WO2024182982A1 - 控制方法、制动器、制动系统、车辆、存储介质及产品 - Google Patents

控制方法、制动器、制动系统、车辆、存储介质及产品 Download PDF

Info

Publication number
WO2024182982A1
WO2024182982A1 PCT/CN2023/079923 CN2023079923W WO2024182982A1 WO 2024182982 A1 WO2024182982 A1 WO 2024182982A1 CN 2023079923 W CN2023079923 W CN 2023079923W WO 2024182982 A1 WO2024182982 A1 WO 2024182982A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
transmission member
piston
signal
friction plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/079923
Other languages
English (en)
French (fr)
Inventor
王兴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN202380089880.1A priority Critical patent/CN120513189A/zh
Priority to EP23925707.4A priority patent/EP4674708A4/en
Priority to PCT/CN2023/079923 priority patent/WO2024182982A1/zh
Publication of WO2024182982A1 publication Critical patent/WO2024182982A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/741Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on an ultimate actuator
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00Parts or details
    • F16D65/14Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • F16D65/183Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes with force-transmitting members arranged side by side acting on a spot type force-applying member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00Type of actuator operation force
    • F16D2121/02Fluid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00Type of actuator operation force
    • F16D2121/02Fluid pressure
    • F16D2121/04Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00Type of actuator operation force
    • F16D2121/18Electric or magnetic
    • F16D2121/24Electric or magnetic using motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2123/00Multiple operation forces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00Components of actuators
    • F16D2125/02Fluid-pressure mechanisms
    • F16D2125/06Pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00Components of actuators
    • F16D2125/18Mechanical mechanisms
    • F16D2125/20Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/40Screw-and-nut
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00Components of actuators
    • F16D2125/18Mechanical mechanisms
    • F16D2125/44Mechanical mechanisms transmitting rotation
    • F16D2125/46Rotating members in mutual engagement
    • F16D2125/48Rotating members in mutual engagement with parallel stationary axes, e.g. spur gears

Definitions

  • the present application relates to the field of braking technology, and in particular to a control method, a brake, a braking system, a vehicle, a storage medium and a product.
  • the braking system is one of the important components of a vehicle, and is directly related to the comprehensive performance of the vehicle and the safety of life and property.
  • the main functions of the braking system are to slow down or even stop a moving vehicle, to keep the speed of a vehicle traveling downhill stable, and to keep a stopped vehicle immobile.
  • the brake system in the related art includes an electronically controlled service brake module and an electronically controlled parking brake module.
  • the electronically controlled service brake module is used to control the speed of the vehicle and even stop the vehicle.
  • the electronically controlled parking brake module is used to keep the parked vehicle immobile.
  • the motor of the electronically controlled parking brake module drives the piston to move through the screw part, so that the friction plate holds the brake disc of the vehicle tightly, thereby realizing parking brake.
  • the electronically controlled service brake module controls the brake fluid to push the piston to move, so that the friction plate holds the brake disc of the vehicle tightly, thereby realizing service brake.
  • the existing braking system has the problem of long parking braking time.
  • the embodiments of the present application provide a control method, a brake, a brake system, a vehicle, a storage medium and a product, which can adjust the gap between the friction plate and the brake disc during service braking, so that the parking brake stroke is reduced, thereby reducing the parking brake time.
  • the present application provides a brake, comprising a friction plate, a piston, a piston cylinder, a first transmission member, and a second transmission member.
  • the piston is arranged inside the piston cylinder, one end of the piston is connected to the first transmission member, the other end of the piston is fixedly connected to the friction plate, and the friction plate is arranged outside the piston cylinder.
  • the second transmission member is transmission-connected to the first transmission member, and the second transmission member is used to be connected to a driving unit, and the driving unit is used to drive the second transmission member to rotate around a rotation axis parallel to the first direction.
  • the first transmission member is used to convert the rotational motion of the second transmission member into the linear motion of the piston along the first direction. When the first transmission member moves along the first direction, the first transmission member is always transmission-connected to the second transmission member and is always connected to the piston.
  • the brake of the embodiment of the present application uses brake fluid to push the piston to drive the friction plate toward the brake disc of the vehicle, so that the friction plate clamps the brake disc to achieve service braking.
  • the driving force output by the drive unit is used to drive the first transmission member to move relative to the piston through the second transmission member. Since the brake fluid is in a high-pressure state at this time, the position of the piston remains stationary, and the first transmission member can move away from the piston in the first direction, so that the relative distance between the piston and the first transmission member increases, thereby reducing the gap between the friction plate and the brake disc after the service braking ends. Therefore, when performing parking braking, the friction plate moves toward the brake disc. The distance the disc travels can be reduced, thereby reducing the parking brake stroke, which can in turn reduce the parking brake time and improve parking efficiency.
  • the end of the piston facing away from the friction plate includes a mating hole
  • the first transmission member includes a screw portion
  • the axis of the screw portion is parallel to the first direction
  • one end of the screw portion is arranged inside the mating hole and connected to the piston
  • the other end of the screw portion is transmission-connected to the second transmission member.
  • the screw part can be used to convert rotation into linear rotation, so that the screw part can drive the piston to move in the first direction, and the screw part can move relative to the piston in the first direction, thereby achieving the purposes of parking brake, adjusting the gap between the friction plate and the brake disc, etc.
  • one end of the screw part is threadedly connected to the piston.
  • one end of the screw part and the piston are used to form a ball screw mechanism.
  • the piston can drive the lead screw part to move in the first direction, or the lead screw part can rotate after receiving the driving force transmitted by the second transmission member, so that the relative spacing between the piston and the lead screw part changes, thereby the spacing between the friction plate and the brake disc can be adjusted.
  • the lead screw part can drive the piston to move linearly in the first direction, thereby realizing parking braking, rapid resetting of the friction plate, zero rolling resistance driving, and driving foreign body removal.
  • the second transmission member includes a spline hole penetrating the second transmission member, and the axis of the spline hole is parallel to the first direction.
  • One end of the first transmission member close to the second transmission member is disposed in the spline hole and spline-connected to the second transmission member.
  • the first transmission member can slide along the first direction inside the second transmission member, so that the first transmission member can move together with the piston, or the first transmission member can slide axially inside the second transmission member relative to the piston.
  • the first transmission member and the second transmission member cooperate with each other, so that the second transmission member can drive the first transmission member to rotate, ensuring that the first transmission member can rotate and can move axially relative to the piston.
  • the outer wall of the first transmission member near one end of the second transmission member includes a plurality of first grooves, each of which extends along the first direction, and the plurality of first grooves are arranged at intervals along the circumference of the first transmission member.
  • the second transmission member includes a plurality of ball members and a third transmission member
  • the third transmission member is sleeved on the outer wall of the first transmission member and is used to connect to the drive unit
  • the inner surface of the third transmission member facing the first transmission member includes a plurality of second grooves, each of which extends along the axial direction of the second transmission member, and the plurality of second grooves are arranged at intervals along the circumference of the second transmission member, and the plurality of second grooves correspond to the plurality of first grooves and the plurality of ball members one by one, respectively, and the opposite ends of each of the ball members are arranged in the corresponding first groove and the second groove.
  • the first transmission member can slide along the first direction inside the second transmission member, so that the first transmission member can move with the piston, or the first transmission member can slide axially inside the second transmission member relative to the piston.
  • the first transmission member and the second transmission member cooperate with each other, so that the second transmission member can drive the first transmission member to rotate, ensuring that the first transmission member can rotate and can move axially relative to the piston.
  • the second transmission member with such a structure can reduce the friction between the first transmission member and the second transmission member, thereby reducing the resistance of the first transmission member sliding inside the second transmission member.
  • the brake further includes a plane bearing, wherein the plane bearing is arranged on the The first transmission member is provided with a first extension portion extending in the radial direction of the first transmission member, the first extension portion is provided between the plane bearing and the piston in the first direction, and the first extension portion is used to abut against the end surface of the plane bearing facing the piston.
  • the plane bearing can ensure that the first transmission member rotates smoothly relative to the piston cylinder.
  • the piston cylinder axially supports the first transmission member in the first direction through the plane bearing, so that the first transmission member can withstand sufficient axial load, so that the piston can move toward the brake disc.
  • the brake further includes an axial limiting mechanism, which is disposed inside the piston cylinder.
  • the axial limiting mechanism is used to prevent the first transmission member from moving along the first direction.
  • the axial limiting mechanism includes an axial matching portion and an axial elastic portion
  • the axial matching portion is fixedly connected to the inner wall of the piston cylinder
  • the axis of the axial elastic portion is parallel to the axis of the first transmission member
  • opposite ends of the axial elastic portion are respectively connected to the axial matching portion and the outer wall of the first transmission member.
  • the elastic force of the axial elastic portion can prevent the first transmission member from moving along the first direction.
  • the number of the axial matching parts and the axial elastic parts are both multiple, the multiple axial matching parts and the multiple axial elastic parts correspond to each other one by one, the multiple axial matching parts are arranged at intervals along the circumference of the first transmission member, and the multiple axial elastic parts are arranged at intervals along the circumference of the first transmission member.
  • the first transmission member includes a second extension part extending along the radial direction of the first transmission member, the second extension part is used to be arranged between the piston and the first extension part of the first transmission member along the first direction, the axial matching part is located between the piston and the second extension part, and the opposite ends of each axial elastic part are respectively connected to the second extension part and the corresponding axial matching part.
  • the number of the axial matching parts and the number of the axial elastic parts are both multiple, the multiple axial matching parts and the multiple axial elastic parts correspond one to one, the multiple axial matching parts are arranged at intervals along the circumference of the first transmission member, and the multiple axial elastic parts are arranged at intervals along the circumference of the first transmission member, each of the axial matching parts is arranged between the first extension part of the first transmission member and the piston along the first direction, and the two ends of each of the axial elastic parts are respectively connected to the first extension part and the corresponding axial matching part.
  • the brake further includes a guide mechanism, a portion of which is disposed on the piston cylinder, and another portion of which is disposed on the first transmission member, and the guide mechanism is used to enable the piston to translate along the first direction.
  • the piston when the brake fluid does not push the piston and the first transmission member rotates, the piston can be driven to move in the first direction, so that the friction plate can move toward or away from the brake disc, thereby realizing functions such as parking brake, adjusting the gap between the friction plate and the brake, quickly resetting the friction plate, driving with zero rolling resistance, and removing foreign objects during driving.
  • the guide mechanism is disposed inside the piston cylinder, a portion of the guide mechanism is disposed on an inner wall of the piston cylinder, and another portion of the guide mechanism is disposed on an outer wall of the first transmission member.
  • the guide mechanism includes at least one guide group, each guide group includes a guide block and a guide groove, and the guide block and the guide groove of each guide group are One is arranged on the inner wall of the piston cylinder, and the other is arranged on the outer wall of the piston.
  • the piston will not rotate around a rotation axis parallel to the first direction, so that the first transmission member can drive the piston to translate along the first direction when it rotates.
  • the piston cylinder is a hollow structure, and the axis of the piston cylinder is parallel to the axis of the friction plate.
  • the outer wall of the piston and the inner wall of the piston cylinder together define a brake cavity with a variable volume, and the piston cylinder includes a liquid inlet opening connected to the brake cavity, and the liquid inlet opening is used to supply brake fluid to enter and exit the brake cavity.
  • the friction plate and the second transmission member are arranged outside the piston cylinder, a part of the first transmission member is arranged inside the piston cylinder, and another part of the first transmission member is arranged outside the piston cylinder and is in transmission connection with the second transmission member.
  • a limiting structure is provided between the piston and the piston cylinder, and the limiting structure is used to locate the relative positions of the piston and the piston cylinder when the piston moves along the first direction, so that the volume of the brake cavity is minimized.
  • Such an arrangement can locate the relative positions of the piston and the piston cylinder when the piston moves away from the brake disc, so that the piston is in the extreme position, thereby minimizing the volume of the brake cavity, and facilitating functions such as brake fluid replacement and exhaust.
  • the piston cylinder further includes an exhaust port communicated with the brake cavity, the exhaust port being used to discharge the gas in the brake cavity.
  • the brake further includes an exhaust member, the exhaust member being used to control the opening and closing of the exhaust port.
  • the gas in the brake cavity can be discharged, so that the brake cavity can be filled with brake fluid.
  • the exhaust member is an exhaust bolt, which is inserted into the exhaust port and threadedly connected to the piston cylinder.
  • Such an arrangement can reduce the cost of the exhaust components while achieving control over the opening and closing of the exhaust port.
  • the exhaust component is an exhaust solenoid valve, which is connected to the exhaust port and electrically connected to a controller, and the controller is used to control the on and off of the exhaust solenoid valve to control the opening and closing of the exhaust port.
  • This arrangement eliminates the need for manual control of the opening and closing of the exhaust port, which helps achieve automatic exhaust.
  • the brake further includes a pressure sensor, and the pressure sensor is used to output a pressure signal according to the pressure of the brake fluid.
  • Detecting the brake fluid pressure through a pressure sensor helps to achieve functions such as hydraulic oil replacement and exhaust, redundant travel braking, and fault detection.
  • the brake further includes a displacement sensor, which is fixedly connected to the piston cylinder, and is configured to output a displacement signal according to movement of the first transmission member along the first direction.
  • the moving distance of the first transmission member in the first direction can be detected.
  • the relative distance between the first transmission member and the piston in the first direction can be obtained.
  • the gap between the brake disc and the friction plate can be obtained, which helps to accurately control the gap between the friction plate and the brake disc.
  • a second aspect of the present application provides a braking system, comprising a drive unit and a brake as described in any one of the first aspects, wherein the drive unit is connected to a second transmission member of the brake.
  • the drive unit includes a motor, a motor shaft of the motor is connected to the second transmission member of the brake: the motor includes an angle sensor, and the angle sensor is used to output an angle signal according to the rotation angle and direction of the motor shaft of the motor.
  • the position of the piston can be obtained according to the angle signal and the moving distance of the first transmission member, so that the position of the friction plate can be obtained, and then the size of the gap between the friction plate and the brake disc can be known, which helps to improve the accuracy of adjusting the gap between the friction plate and the brake disc.
  • the precise detection of the position of the first transmission member can also be achieved.
  • the braking system further includes a brake fluid device, which is connected to the fluid inlet opening of the brake and is used to control the flow of brake fluid into and out of the brake cavity of the brake, thereby realizing functions such as service braking, hydraulic oil replacement and exhaust.
  • a brake fluid device which is connected to the fluid inlet opening of the brake and is used to control the flow of brake fluid into and out of the brake cavity of the brake, thereby realizing functions such as service braking, hydraulic oil replacement and exhaust.
  • the brake fluid device includes a brake fluid pipeline, a first solenoid valve, a second solenoid valve, and an oil pot.
  • the first interface of the brake fluid pipeline is used to communicate with the fluid inlet opening of the brake
  • the second interface of the brake fluid pipeline is connected to the oil pot through the first solenoid valve
  • the third interface of the brake fluid pipeline is connected to the first interface of the second solenoid valve.
  • the second interface of the second solenoid valve is used to supply brake fluid to enter and exit the brake fluid pipeline.
  • the brake cavity and the oil pot can be connected, so that when the piston moves a large stroke and the volume of the brake cavity increases, the brake cavity can always be filled with brake fluid.
  • the braking system further includes a controller, and the controller is electrically connected to the drive unit and the brake, and is used to be electrically connected to a brake fluid device.
  • the controller can control the brake, brake fluid device and drive unit according to signals such as angle signals, pressure signals and displacement signals to achieve functions such as service braking, parking braking and clearance adjustment.
  • a third aspect of the present application provides a vehicle, comprising wheels and a braking system as described in any one of the second aspects, wherein the braking system is used to brake the wheels.
  • a fourth aspect of the present application provides a control method, which is applied to a brake system, the brake system comprising a brake fluid device, a drive unit and the brake according to the first aspect, wherein: the brake comprises a friction plate, a piston, a first transmission member and a second transmission member, the friction plate and the piston are arranged side by side along the first direction, one end of the piston is fixedly connected to the friction plate, the other end of the piston is connected to the first transmission member, the first transmission member is transmission-connected to the second transmission member, and the second transmission member is connected to the drive unit;
  • the control method comprises:
  • the driving unit is controlled to drive the first transmission member to rotate through the second transmission member according to the current relative distance and the preset relative distance, until the current relative distance becomes a first target relative distance.
  • controlling the driving unit to drive the first transmission member to rotate through the second transmission member according to the current relative distance and the preset relative distance until the current relative distance becomes a first target relative distance includes:
  • the piston When the current relative distance is greater than the preset relative distance, the piston is used to receive the hydraulic driving force and drive the first transmission member to move along the first direction.
  • the brake fluid device includes a brake fluid pipeline, a first solenoid valve, a second solenoid valve and an oil pot, the first interface of the brake fluid pipeline is connected to the fluid inlet opening of the brake, the second interface of the brake fluid pipeline is connected to the oil pot through the first solenoid valve, the third interface of the brake fluid pipeline is connected to the first interface of the second solenoid valve, and the second interface of the second solenoid valve is used to supply brake fluid to enter and exit the brake fluid pipeline;
  • the control method further comprises:
  • the driving unit is controlled to drive the first transmission member to rotate through the second transmission member until the current relative distance becomes a second target relative distance, and the first solenoid valve of the brake fluid device is controlled to be closed and the second solenoid valve is turned on.
  • control method further includes:
  • the service brake release signal refers to a signal indicating whether the brake system has finished performing service braking on the vehicle
  • the first solenoid valve of the brake fluid device is controlled to be closed and the second solenoid valve is controlled to be turned on;
  • the driving unit is controlled to drive the first transmission member to rotate through the second transmission member according to the service brake release signal until the current relative distance becomes a third target relative distance.
  • the driving unit includes a motor having an angle sensor, the angle sensor outputting an angle signal when the motor is working, and the brake further includes a pressure sensor and a displacement sensor, the pressure sensor being used to output a pressure signal according to the pressure of the brake fluid, and the displacement sensor being used to output a displacement signal according to the movement of the first transmission member along the first direction;
  • the control method further comprises:
  • the fault indication signal is used to indicate whether the brake fluid device has a fault
  • the control parameter includes the pressure signal, the displacement signal and the angle signal
  • the drive unit is controlled to drive the first transmission member to rotate through the second transmission member according to the fault indication signal and the control parameter, so as to achieve redundant service braking.
  • the method before acquiring the fault indication signal and the control parameter, the method further includes:
  • the volume of the brake chamber of the brake is controlled to be reduced, and the current displacement signal, the pressure signal and the angle signal are obtained;
  • the service brake failure signal refers to that the brake pedal of the vehicle sends a pressure building signal, but the pressure of the brake fluid of the brake system remains unchanged;
  • control method further includes:
  • the driving unit is controlled to drive the first transmission member to rotate through the second transmission member until the current relative distance becomes a fourth target relative distance, and the first solenoid valve of the brake fluid device is controlled to be closed.
  • control method further includes:
  • the exhaust port of the brake cavity is controlled to open, and the driving unit is controlled to drive the first transmission member to rotate through the second transmission member until the volume of the brake cavity reaches a minimum, and the exhaust port of the brake cavity is controlled to close;
  • the first solenoid valve of the brake fluid device When the volume of the brake chamber reaches a minimum, the first solenoid valve of the brake fluid device is controlled to be turned on, and the driving unit is controlled to drive the first transmission member to rotate through the second transmission member, until the volume of the brake chamber reaches a maximum, and the first solenoid valve is controlled to be closed;
  • the exhaust port is controlled to be opened according to the current pressure value and the preset exhaust pressure value until the current pressure value decreases to the target pressure value, and the exhaust port is controlled to be closed.
  • the method further includes:
  • the driving unit is controlled to drive the first transmission member to rotate through the second transmission member until the moving distance of the piston reaches the target distance, and the exhaust port is controlled to be closed.
  • control method further includes:
  • a driving signal Acquire a driving signal, a preset gap value between the friction plate and the brake disc, and a current gap value between the friction plate and the brake disc; wherein the driving signal is used to indicate whether the vehicle is in a driving state;
  • the driving unit is controlled to drive the first transmission member to rotate through the second transmission member according to the driving signal, the current gap value and the preset gap value, until the current gap value becomes a target gap value.
  • a fifth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method described in any one of the fourth aspects.
  • a sixth aspect of the present application provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements any method described in the fourth aspect.
  • FIG1 is a schematic diagram of the structure of a vehicle provided in an embodiment of the present application.
  • FIG2 is a schematic structural diagram of a braking system in the related art
  • FIG3 is a cross-sectional view of a first braking system provided in an embodiment of the present application.
  • FIG4 is a schematic diagram of the gap between the friction plate and the brake disc and the relative distance between the piston and the first transmission member
  • FIG. 5 is a cross-section of a structure in which a first transmission member and a second transmission member are connected in transmission according to an embodiment of the present application. picture;
  • FIG6 is a cross-sectional view of another structure in which a first transmission member is transmission-connected to a second transmission member according to an embodiment of the present application;
  • FIG7 is a partial enlarged view of point A in FIG3;
  • FIG8 is a cross-sectional view of a second braking system provided in an embodiment of the present application.
  • FIG9 is a schematic diagram showing a friction plate that is worn
  • FIG10 is a schematic diagram showing foreign matter entering between the friction plate and the brake disc during driving.
  • volume limiting portion 192. volume matching portion
  • controller 40. controller; 50. displacement sensor; 60. pressure sensor; 70. one-way valve;
  • first sealing ring 82. second sealing ring
  • FIG1 is a schematic diagram of the structure of a vehicle 1 provided in an embodiment of the present application.
  • the vehicle 1 provided in an embodiment of the present application may include a brake disc 2, a wheel 5, a vehicle body 4, and a brake system 3.
  • the brake disc 2 is fixedly connected to the wheel 5.
  • the brake system 3 is fixedly connected to the vehicle body 4, and the brake system 3 is used to clamp the brake disc 2 to achieve driving brake and parking brake.
  • the vehicle body 4 refers to the main structure of the vehicle 1 for connecting the wheel 5, the brake system 3 and other components.
  • the vehicle 1 of the embodiment of the present application can be an electric vehicle/electric vehicle (Electric Vehicle, EV), or it can also be a pure electric vehicle (Pure Electric Vehicle/Battery Electric Vehicle, PEV/BEV), a hybrid electric vehicle (Hybrid Electric Vehicle, HEV), a range extended electric vehicle (Range Extended Electric Vehicle, REEV), a plug-in hybrid electric vehicle (Plug-in Hybrid Electric Vehicle, PHEV), a new energy vehicle (New Energy Vehicle, NEV), etc.
  • Electric Vehicle/Battery Electric Vehicle PEV/BEV
  • Hybrid Electric Vehicle HEV
  • range extended electric vehicle Range Extended Electric Vehicle
  • REEV Range Extended Electric Vehicle
  • PHEV plug-in hybrid electric vehicle
  • New Energy Vehicle New Energy Vehicle
  • the brake system 3 mainly includes a parking brake module and a service brake module.
  • the service brake module uses hydraulic oil (brake fluid) to push the friction plate 11 through a mechanical structure to clamp the brake disc 2, so that the friction plate 11 clamps the brake disc 2 to achieve service braking.
  • the parking brake module uses a motor to push the friction plate 11 through a mechanical structure to clamp the brake disc 2 to achieve parking braking.
  • FIG2 is a schematic diagram of the structure of a brake device in the related art.
  • the brake device in the related art includes a controller 11, a piston 12, two friction plates 13, a caliper body 14, a lead screw 15, a nut 16, a motor 17 and a brake fluid device 18.
  • the caliper body 14 has a piston cavity 141, a liquid inlet 142 and a connection port 143, and the piston cavity 141 is connected with the liquid inlet 142 and the connection port 143 respectively.
  • the piston 12 is movably installed in the piston cavity 141.
  • the lead screw 15 is inserted into the connection port 143, and one end of the lead screw 15 located outside the piston cavity 141 is transmission-connected with the motor 17.
  • the nut 16 is sleeved on one end of the lead screw 15 located in the piston cavity 141 and is threadedly matched with the lead screw 15.
  • the two friction plates 13 are located on opposite sides of the brake disc 2, and one of the two friction plates 13 is fixedly connected to the piston 12, and the other friction plate 13 is fixedly connected to the caliper body 14.
  • the brake fluid device 18 is connected to the fluid inlet 142.
  • the controller 11 is electrically connected to the motor 17 and the brake fluid device 18, respectively. When service braking is required, the controller 11 controls the brake fluid device 18 to deliver brake fluid to the piston cavity 141.
  • the brake fluid pushes the piston 12 to move leftward along the axial direction of the brake disc 2 (such as the X direction in Figure 2), and the two friction plates 13 move toward the brake disc 2 respectively, until the two friction plates 13 hold the brake disc 2 tightly, thereby achieving service braking.
  • the controller 11 controls the motor 17 to work, and the motor 17 drives the lead screw 15 to rotate, and the lead screw 15 drives the nut 16 to move leftward along the axial direction of the lead screw 15.
  • the nut 16 pushes the piston 12 to move leftward, and the two friction plates 13 move toward the brake disc 2 respectively, until the two friction plates 13 hold the brake disc 2 tightly, thereby achieving parking braking.
  • the gap between the friction plate and the brake disc is large, the distance that the friction plate needs to travel toward the brake disc during parking braking is long, so the parking brake stroke is long, and then the parking brake time is long.
  • the gap between the friction plate and the brake disc will also increase, thereby increasing the braking idle stroke, thereby increasing the braking time and braking distance.
  • the increase in the gap between the friction plate and the brake disc will also cause a change in the brake feel.
  • the separation of the friction plate and the brake disc depends on the friction force of the brake disc to completely separate, and there is a drag torque, which will increase the wear of the friction plate and/or the brake disc and produce abnormal noise.
  • the embodiments of the present application provide a control method, a brake, a brake system, a storage medium and a product.
  • the gap between the friction plate and the brake disc can be adjusted, so that after the service braking is completed, the gap between the friction plate and the brake disc becomes smaller. Therefore, during the parking braking process of the brake system, since the gap between the friction plate and the brake disc becomes smaller, the distance that the friction plate needs to travel becomes shorter, thereby shortening the parking brake stroke, reducing the parking brake time, and improving the parking efficiency.
  • FIG3 is a cross-sectional view of the first brake system provided in the embodiment of the present application.
  • the brake system 3 provided in the embodiment of the present application may include a brake fluid device 30, a drive unit 22 and a brake 10.
  • the brake fluid device 30 is used to output a hydraulic driving force transmitted to the brake 10, and the hydraulic driving force enables the brake 10 to clamp the brake disc 2 of the vehicle 1 to achieve driving braking.
  • the drive unit 22 is used to output a driving force transmitted to the brake 10, and the driving force enables the brake 10 to clamp the brake disc 2 of the vehicle 1 to achieve parking braking.
  • the brake 10 may include a friction plate 11, a piston 122, a piston cylinder 121, a first transmission member 123, and a second transmission member 21.
  • the friction plate 11 and the piston 122 are arranged side by side along a first direction, and the friction plate 11 is arranged outside the piston cylinder 121.
  • the piston cylinder 121 is used to connect with the body of the vehicle 1 to fix the brake 10.
  • the piston 122 is arranged inside the piston cylinder 121, one end of the piston 122 is connected to the first transmission member 123, and the other end of the piston 122 is fixedly connected to the friction plate 11.
  • the second transmission member 21 is transmission-connected to the first transmission member 123, and the second transmission member 21 is used to connect to the drive unit 22, and the drive unit 22 is used to drive the second transmission member 21 to rotate around a rotation axis parallel to the first direction (such as the X direction in FIG3 ).
  • the first transmission member 123 is used to convert the rotational motion of the second transmission member 21 into the linear motion of the piston 122 along the first direction.
  • the first transmission member 123 moves along the first direction, the first transmission member 123 is always in transmission connection with the second transmission member 21 and is always connected with the piston 122. It can be understood that the first direction is parallel to the first direction, and the axis of the piston 122 is parallel to the first direction.
  • the first transmission member 123 When the first transmission member 123 is used to convert the rotational motion of the second transmission member 21 into the linear motion of the piston 122 along the first direction, the first transmission member 123 can drive the piston 122 to move along the first direction, or the first transmission member 123 can move along the first direction relative to the piston 122. In addition, in addition to moving along the first direction relative to the piston 122, the first transmission member 123 can also move along the first direction with the piston 122.
  • the power source for driving the first transmission member 123 to move in the first direction there is no limitation on the power source for driving the first transmission member 123 to move in the first direction.
  • the driving unit 22 does not drive the second transmission member 21 to rotate and the piston 122 receives the hydraulic driving force output by the brake fluid device 30, the first transmission member 123 can move along the first direction with the piston 122.
  • the driving unit 22 drives the piston 122 to move toward the brake disc 2 along the first direction through the second transmission member 21 and the first transmission member 123, so that the friction plate 11 can clamp the brake disc 2 to achieve parking braking.
  • the piston 122 is used to receive the hydraulic driving force output by the brake fluid device 30, and the hydraulic driving force pushes the piston 122 to move toward the brake disc 2 along the first direction, so that the piston 122 pushes the friction plate 11 to move toward the brake disc 2 along the first direction so that the friction plate 11 clamps the brake disc 2 to achieve service braking.
  • the piston 122 can drive the first transmission member 123 to move along the first direction. In other words, the distance between the other end of the piston 122 and the first transmission member 123 will not change. In addition, during the parking braking process, the piston 122 moves toward the brake disc 2 along the first direction, and the position of the first transmission member 123 relative to the brake disc 2 in the first direction remains almost unchanged. It can be considered that the first transmission member 123 does not move axially in the first direction.
  • the first transmission member 123 can receive the driving force output by the driving unit 22 through the second transmission member 21, and the driving force will cause the first transmission member 123 to move along the first direction away from the piston 122 (during the service braking process, the hydraulic driving force keeps the position of the piston 122 stationary), so that the relative distance between the first transmission member 123 and the piston 122 increases, so that after the service braking is completed, the gap between the friction plate 11 and the brake disc 2 can be reduced, and then the distance that the friction plate 11 needs to travel during parking braking can be shortened, which can shorten the parking braking time and improve the parking efficiency.
  • the relative spacing between the first transmission member 123 and the piston 122 may refer to the spacing in the first direction between one end of the first transmission member 123 and one end of the piston 122.
  • the relative spacing between the first transmission member 123 and the piston 122 is the spacing between the right end surface of the piston 122 and the middle of the first transmission member 123 (as shown in B in FIG3 ), or the relative spacing between the first transmission member 123 and the piston 122 may also be the spacing between the right end surface of the piston 122 and the right end surface of the first transmission member 123 (as shown in C in FIG3 ).
  • FIG4 is a schematic diagram of the gap between the friction plate 11 and the brake disc 2 and the relative spacing between the piston 122 and the first transmission member 123.
  • F in FIG4 is a constant value.
  • D and G are constant values, the size of E depends on the size of B or C. Therefore, the gap between the friction plate 11 and the brake disc 2 is negatively correlated with the relative spacing between the first transmission member 123 and the piston 122.
  • the hydraulic driving force keeps the position of the piston 122 stationary, so that the drive unit 22 can drive the first transmission member 123 to move rightward relative to the piston 122 through the second transmission member 21, so that the relative distance between the first transmission member 123 and the piston 122 (such as B or C in Figure 3) increases. It can be understood that no matter how the relative distance between the first transmission member 123 and the piston 122 changes, the piston 122 is always connected to the first transmission member 123.
  • the drive unit 22 can also drive the first transmission member 123 to move leftward relative to the piston 122, so that the relative distance between the first transmission member 123 and the piston 122 is reduced.
  • the driving unit 22 can drive the piston 122 to move toward the brake disc 2 through the second transmission member 21 and the first transmission member 123, so that the friction plate 11 can clamp the brake disc 2.
  • the position of the first transmission member 123 remains unchanged. In other words, the distance between the first transmission member 123 and the brake disc 2 remains unchanged, so that the first transmission member 123 can drive the piston 122 to move to the left, so that the friction plate 11 can clamp the brake disc 2.
  • the embodiment of the present application controls the relative position between the first transmission member 123 and the piston 122 during driving.
  • Increasing the spacing can shorten the distance that the friction plate 11 (or piston 122) needs to travel during parking braking, shorten the parking braking time, and improve parking efficiency.
  • shortening the distance that the friction plate 11 (piston 122) needs to travel during parking braking can also be understood as moving part of the stroke of the piston 122 moving toward the brake disc 2 during parking braking to the process of driving braking in advance, or it can be understood as partially overlapping the driving braking time and the driving braking time.
  • the end of the piston 122 facing away from the friction plate 11 includes a matching hole
  • the first transmission member 123 includes a screw portion 127
  • the axis of the screw portion 127 is parallel to the first direction
  • one end of the screw portion 127 is arranged inside the matching hole and connected to the piston 122
  • the other end of the screw portion 127 is in transmission connection with the second transmission member 21.
  • the screw portion 127 can be used to convert rotation into linear rotation, so that the screw portion 127 can drive the piston 122 to move along the first direction, and the screw portion 127 can move relative to the piston 122 along the first direction, thereby achieving parking brake and adjusting the gap between the friction plate 11 and the brake disc 2, thereby avoiding the problem of increased braking time due to a large gap between the friction plate 11 and the brake disc 2 caused by replacement of the friction plate 11, replacement of the brake disc 2, or wear of one of the friction plate 11 and the brake disc 2.
  • the matching hole may be a blind hole, and the axis of the matching hole is parallel to the axis of the lead screw portion 127.
  • the matching hole may also penetrate the piston 122 along the first direction, which is not limited here.
  • the matching form of the piston 122 and the screw part 127 is similar to a threaded connection.
  • the screw part 127 can drive the piston 122 to move along the first direction while rotating, so that the friction plate 11 is close to the brake disc 2.
  • the screw part 127 can move relative to the piston 122 along the first direction while rotating.
  • the piston 122 When the piston 122 receives the hydraulic driving force and the screw part 127 does not receive the driving force, the piston 122 can drive the screw part 127 to move together while moving along the first direction, and at this time, the relative distance between the piston 122 and the screw part 127 does not change.
  • the following describes a connection method between the piston 122 and the screw part 127 to ensure that the piston 122 can move along the first direction when the screw part 127 rotates.
  • one end of the lead screw portion 127 is passed through the mating hole of the piston 122 and is threadedly connected to the piston 122, so that the piston 122 and the lead screw portion 127 can be similar to a lead screw nut mechanism, and then the piston 122 can drive the lead screw portion 127 to move in a first direction, the lead screw portion 127 can move in the first direction relative to the piston 122, and when the lead screw portion 127 rotates, it can drive the piston 122 to move in the first direction, so as to realize functions such as driving brake and parking brake.
  • the piston 122 is similar to a nut in function, so that the piston 122 and the screw part 127 can form a screw nut mechanism. Therefore, when the piston 122 receives the hydraulic driving force and the screw part 127 does not receive the driving force, the piston 122 can drive the screw part 127 to move along the first direction, and the screw part 127 and the piston 122 are always connected while the driving force is realized.
  • the piston 122 When the piston 122 receives the hydraulic driving force and the screw part 127 receives the driving force, the piston 122 moves along the first direction while the screw part 127 moves in the opposite direction to the direction of movement of the piston 122, so that the relative spacing between the screw part 127 and the piston 122 increases, so as to reduce the distance that the friction plate 11 has to travel in the parking brake, so as to shorten the parking time.
  • the screw part 127 can drive the piston 122 to move along the first direction, so that the friction plate 11 can clamp the brake disc 2, and realize the parking brake.
  • the lead screw portion 127 includes a screw segment, a connecting rod segment and a transmission rod segment which are sequentially connected along a first direction.
  • the screw segment is arranged in the matching hole and is threadedly connected to the piston 122 , and the transmission rod segment is used for transmission connection with the second transmission member 21 .
  • one end of the lead screw portion 127 is inserted into the matching hole of the piston 122, and one end of the lead screw portion 127 is used to define a ball screw mechanism together with the piston 122, which can reduce the friction between the piston 122 and the lead screw portion 127, and help improve the accuracy of the movement of the piston 122 and/or the lead screw portion 127.
  • the piston 122 may include a nut and a steel ball.
  • the nut is sleeved on the screw part 127 and is screw-driven with the screw part 127 through the steel ball.
  • the steel ball can realize rolling friction between the nut and the screw part 127, which can improve the problem of easy wear and low positioning accuracy of the screw part 127.
  • both the screw-nut mechanism and the ball screw mechanism are screw transmission mechanisms, and both can convert the rotational motion of the screw portion 127 into the linear motion of the piston 122, so that the piston 122 drives the friction plate 11 to move along the first direction.
  • the motion forms of the first transmission member 123 include: the first motion form is that the first transmission member 123 moves along the first direction driven by the piston 122 or the second transmission member 21, and the second motion form is that the first transmission member 123 rotates under the action of the second transmission member 21. Therefore, when the drive unit 22 does not output the driving force, the connection mode between the first transmission member 123 and the second transmission member 21 needs to ensure that the first transmission member 123 can move in translation with the piston 122, and when the drive unit 22 outputs the driving force, the connection mode between the first transmission member 123 and the second transmission member 21 needs to ensure that the first transmission member 123 can rotate.
  • FIG5 is a cross-sectional view of a structure of a first transmission member 123 and a second transmission member 21 in transmission connection according to an embodiment of the present application.
  • the second transmission member 21 may include a spline hole 216 that penetrates the second transmission member 21, and the axis of the spline hole 216 is parallel to the first direction.
  • One end of the first transmission member 123 close to the second transmission member 21 is arranged in the spline hole 216 and is spline-connected with the second transmission member 21.
  • the first transmission member 123 can slide along the first direction inside the second transmission member 21, so that the first transmission member 123 can move with the piston 122, or the first transmission member 123 can slide axially inside the second transmission member 21 relative to the piston 122.
  • the first transmission member 123 and the second transmission member 21 cooperate with each other, so that the second transmission member 21 can drive the first transmission member 123 to rotate, ensuring that the first transmission member 123 can rotate and can move axially relative to the piston 122.
  • the structure of the second transmission member 21 can be an annular structure, so that the second transmission member 21 can be sleeved on the outer wall of the other end of the screw part 127 and spline-connected with the first transmission member 123, so that the second transmission member 21 and the first transmission member 123 can abut against each other in the circumferential direction of the screw part 127, and then the second transmission member 21 can drive the first transmission member 123 to rotate.
  • one end of the first transmission member 123 may include a lead screw portion 127 and a plurality of transmission tooth portions 128, each transmission tooth portion 128 extending in a direction parallel to the axial direction of the lead screw portion 127, and a plurality of transmission tooth portions 128 are arranged at intervals along the circumference of the lead screw portion 127 and fixedly connected to the outer wall of the lead screw portion 127.
  • the longitudinal section of each transmission tooth portion 128 may include, but is not limited to, a rectangle (as shown in FIG. 6 ), a triangle, or a semicircle, etc.
  • the longitudinal section of each transmission tooth portion 128 is perpendicular to the axial direction of the lead screw portion 127.
  • Fig. 6 is a cross-sectional view of another structure of the first transmission member 123 and the second transmission member 21 provided in an embodiment of the present application in transmission connection.
  • the outer wall of the first transmission member 123 at one end close to the second transmission member 21 may include a plurality of first grooves 124, each of which extends along the axial direction of the first transmission member 123, and the plurality of first grooves 124 are arranged at intervals along the circumferential direction of the first transmission member 123 (such as the M direction in Fig. 6).
  • the second transmission member 21 may include a plurality of ball members 212 and a third transmission member 211.
  • the third transmission member 211 is sleeved on the outer wall of the first transmission member 123 and is used to be connected to the drive unit 22.
  • the inner surface of the third transmission member 211 facing the first transmission member 123 includes a plurality of second grooves 213.
  • Each second groove 213 extends along the axial direction of the second transmission member 21.
  • the plurality of second grooves 213 are spaced apart along the circumferential direction of the second transmission member 21 (such as the M direction in Figure 6).
  • the plurality of second grooves 213 correspond one-to-one to the plurality of first grooves 124 and the plurality of ball members 212, respectively.
  • the opposite ends of each ball member 212 are respectively arranged in the interior of the corresponding first groove 124 and the interior of the second groove 213.
  • the first transmission member 123 can slide along the first direction inside the second transmission member 21, so that the first transmission member 123 can move with the piston 122, or the first transmission member 123 can slide axially inside the second transmission member 21 relative to the piston 122.
  • the first transmission member 123 and the second transmission member 21 cooperate with each other, so that the second transmission member 21 can drive the first transmission member 123 to rotate, ensuring that the first transmission member 123 can rotate and can move axially relative to the piston 122.
  • the second transmission member 21 with such a structure can reduce the friction between the first transmission member 123 and the second transmission member 21, thereby reducing the resistance of the first transmission member 123 sliding inside the second transmission member 21.
  • the first groove 124 can be provided on the outer wall of the screw portion 127 of the first transmission member 123 , and the extending direction of the first groove 124 is parallel to the axial direction of the screw portion 127 .
  • first groove 124 and the second groove 213 can both be arcuate grooves, and the longitudinal sections of the first groove 124 and the second groove 213 can both be an arcuate segment.
  • the longitudinal sections of the first groove 124 and the second groove 213 are perpendicular to the axial direction of the first transmission member 123 .
  • each ball member 212 may include at least one ball, and the opposite ends of each ball are respectively inserted into the first groove 124 and the second groove 213 corresponding to the ball member 212.
  • the number of balls in each ball member 212 may be the same or different, which is not limited here.
  • the third transmission member 211 may include a driving gear and a driven gear member.
  • the drive unit 22 may include a motor, and the driving gear is sleeved on the output shaft of the motor and fixedly connected to the motor shaft.
  • the driven gear member may include a third transmission member 211 and a plurality of ball members 212.
  • the third transmission member 211 may be a gear sleeved on the outer wall of the first transmission member 123 and cooperated with the first transmission member 123 through the ball member 212, and the third transmission member 211 is meshed with the driving gear. Therefore, the third transmission member 211 may be similar to a gear.
  • the second transmission member 21 may be similar to a reducer in function, and the specific reduction ratio and reduction form of the reducer are not limited here.
  • the second transmission member 21 may be a multi-stage fixed-axis reducer, a planetary gear reducer, a harmonic gear reducer, etc.
  • the second transmission member 21 may include The large gear 214 and the small gear 215 mesh with each other to achieve speed reduction and torque increase.
  • the small gear 215 is mounted on the motor shaft of the motor.
  • the large gear 214 is mounted on the outer wall of the screw part 127 of the first transmission member 123 and is transmission-connected with the screw part 127 of the first transmission member 123.
  • the first transmission member 123 can slide in the large gear 214, so that the first transmission member 123 can move along the first direction relative to the large gear 214.
  • the large gear 214 can also abut against the first transmission member 123 in the circumferential direction, so that the large gear 214 can drive the first transmission member 123 to rotate.
  • the large gear 214 can be transmission-connected with the first transmission member 123 by means of a spline connection.
  • the large gear 214 can include the above-mentioned ball member 212 and the third transmission member 211.
  • FIG. 7 is a partial enlarged view of A in FIG. 7 .
  • the brake 10 may further include a plane bearing 14, which is disposed inside the piston cylinder 121 and fixedly connected to the piston cylinder 121, and is sleeved on the outer wall of the first transmission member 123 and movably connected to the first transmission member 123.
  • the first transmission member 123 includes a first extension portion 125 extending along the radial direction of the first transmission member 123, and the first extension portion 125 is disposed between the plane bearing 14 and the piston 122 along the axial direction of the first transmission member 123, and the first extension portion 125 is used to abut against the end surface of the plane bearing 14 facing the piston 122.
  • the plane bearing 14 can ensure that the first transmission member 123 rotates smoothly relative to the piston cylinder 121.
  • the piston cylinder 121 axially supports the first transmission member 123 along the first direction through the plane bearing 14, so that the first transmission member 123 can withstand sufficient axial load, so that the piston 122 can move toward the brake disc 2.
  • first transmission member 123 can abut against the piston cylinder 121 in the axial direction through the plane bearing 14, so that the relative position of the first transmission member 123 and the piston cylinder 121 remains unchanged.
  • the first transmission member 123 can rotate smoothly to drive the piston 122 to move, thereby realizing parking brake.
  • the first extension portion 125 may be a hollow ring-shaped body, and the ring-shaped body is used to abut against the end surface of the plane bearing 14 at one end facing the brake disc 2 in the first direction.
  • the first extension portion 125 may include two extension blocks, which are arranged at intervals in the circumferential direction of the first transmission member 123, and each extension block is used to contact the plane bearing 14.
  • the first transmission member 123 having the first extension portion 125 may include the first extension portion 125 and the lead screw portion 127.
  • the axial direction of the lead screw portion 127 is parallel to the first direction, and the opposite ends of the lead screw portion 127 are respectively connected to the piston 122 and the second transmission member 21.
  • the first extension portion 125 is arranged on the outer wall of the lead screw portion 127 and is fixedly connected to the lead screw portion 127.
  • the lead screw portion 127 and the first extension portion 125 can be an integral structure or a split structure, which is not limited here.
  • the brake 10 may further include a retaining spring 15, and the plane bearing 14 may be fixedly connected to the piston cylinder 121 via the retaining spring 15.
  • the retaining spring 15 may constrain the plane bearing 14 in the first direction to prevent the position of the plane bearing 14 relative to the piston cylinder 121 from changing.
  • the brake 10 may further include an axial limiting mechanism 16, which is disposed inside the piston cylinder 121.
  • the axial limiting mechanism 16 is used to prevent the first transmission member 123 from moving along the first direction.
  • the axial limiting mechanism 16 may include an axial matching portion 162 and an axial elastic portion 161.
  • the axial matching portion 162 The axial elastic part 161 is fixedly connected to the inner wall of the piston cylinder 121, the axis of the axial elastic part 161 is parallel to the axis of the first transmission member 123, and the opposite ends of the axial elastic part 161 are respectively connected to the axial matching part 162 and the outer wall of the first transmission member 123. Therefore, the elastic force of the axial elastic part 161 can prevent the first transmission member 123 from moving along the first direction.
  • the axial matching portion 162 may be an axial matching block extending in a second direction perpendicular to the first direction, and the two ends of the axial matching block are respectively connected to the inner wall of the piston cylinder 121 and one end of the axial elastic portion 161.
  • the axial elastic portion 161 may be a spring, the two ends of the spring are respectively connected to the axial matching portion 162 and the outer wall of the first transmission member 123, and the axial direction of the spring is parallel to the axial direction of the first transmission member 123.
  • the axial elastic portion 161 may be an elastic block with elasticity, the two ends of the elastic block are respectively connected to the axial matching portion 162 and the outer wall of the first transmission member 123, and the extension direction of the elastic block is parallel to the axial direction of the first transmission member 123.
  • the number of the axial elastic portion 161 and the axial matching portion 162 can be at least one, and at least one axial elastic portion 161 corresponds to at least one axial matching portion 162.
  • the multiple axial matching portions 162 correspond to the multiple axial elastic portions 161
  • the multiple axial matching portions 162 are arranged at intervals along the circumference of the first transmission member 123
  • the multiple axial elastic portions 161 are arranged at intervals along the circumference of the first transmission member 123.
  • the first transmission member 123 may include a second extension portion 126 extending in the radial direction of the first transmission member 123, the second extension portion 126 is used to be arranged between the piston 122 and the first extension portion 125 of the first transmission member 123 along the first direction, the axial matching portion 162 is located between the piston 122 and the second extension portion 126, and the opposite ends of the axial elastic portion 161 are respectively connected to the second extension portion 126 and the axial matching portion 162.
  • the opposite ends of each axial elastic portion 161 are respectively connected to the second extension portion 126 and the corresponding axial matching portion 162.
  • the second extension portion 126 may be a hollow annular portion, and the axial direction of the annular portion is parallel to the first direction.
  • the second extension portion 126 may include a plurality of second extension blocks arranged at intervals around the circumference of the first transmission member 123, and the direction in which each second extension block extends is perpendicular to the first direction.
  • the second extension portion 126 is connected to the first extension portion 125.
  • the size of the second extension portion 126 can be determined according to the position of the axial elastic portion 161, which is not limited here.
  • the first transmission member 123 having the first extension portion 125 and the second extension portion 126 is not limited here.
  • the first transmission member 123 may include a first extension portion 125, a second extension portion 126 and a screw portion 127.
  • the axial direction of the screw portion 127 is parallel to the first direction, and the opposite ends of the screw portion 127 are respectively connected to the piston 122 and the second transmission member 21.
  • the first extension portion 125 and the second extension portion 126 are respectively arranged on the outer wall of the screw portion 127 and are fixedly connected to the screw portion 127.
  • the screw portion 127, the first extension portion 125 and the second extension portion 126 can be an integral structure or a split structure, which is not limited here.
  • the first extension portion 125 can also be used to replace the role of the second extension portion 126.
  • the axial matching portion 162 is located between the first extension portion 125 and the piston 122 along the first direction, and the two ends of the axial elastic portion 161 are respectively The first extension portion 125 and the axial matching portion 162 are respectively connected.
  • the brake 10 may further include a guide mechanism 13, a part of the guide mechanism 13 is disposed on the piston cylinder 121, and another part of the guide mechanism 13 is disposed on the first transmission member 123, and the guide mechanism 13 is used to make the piston 122 move in a first direction.
  • the first transmission member 123 can drive the piston 122 to move in a first direction, so as to realize the functions of driving brake, adjusting the distance between the friction plate 11 and the brake, quickly resetting the friction plate 11, driving with zero rolling resistance, and removing foreign objects during driving.
  • the guide mechanism 13 may be disposed inside the piston cylinder 121, a portion of the guide mechanism 13 may be disposed on the inner wall of the piston cylinder 121, and another portion of the guide mechanism 13 may be disposed on the outer wall of the first transmission member 123.
  • the guide mechanism 13 may include two guide groups, and the two guide groups are arranged at intervals along the circumference of the first transmission member 123.
  • Each guide group may include a guide block 131 and a guide groove 132.
  • One of the guide blocks 131 and the guide groove 132 of each guide group is arranged on the inner wall of the piston cylinder 121, and the other is arranged on the outer wall of the piston 122.
  • the guide block 131 is slidably arranged in the guide groove 132, and the piston 122 will not rotate around the axis of the first transmission member 123, so that the piston 122 can be driven to translate along the first direction when the first transmission member 123 rotates.
  • the number of guide groups in addition to two, may also be one, three, four, five, etc.
  • the longitudinal section of the guide block 131 may be an isosceles trapezoid.
  • the shape of the guide groove 132 can be adapted to the portion of the guide block 131 inserted into the guide groove 132, and no specific limitation is made here.
  • the guide block 131 is fixedly connected to the inner wall of the piston cylinder 121, and the guide groove 132 is provided on the outer wall of the piston 122.
  • the guide block 131 may be fixedly connected to the outer wall of the piston 122, and the guide groove 132 may be provided on the inner wall of the piston cylinder 121.
  • the piston cylinder 121 may be a hollow structure, and the axis of the piston cylinder 121 is parallel to the axis of the friction plate 11.
  • the outer wall of the piston 122 and the inner wall of the piston cylinder 121 together define a brake chamber 171 with a variable volume, and the piston cylinder 121 includes a liquid inlet opening 1211 connected to the brake chamber 171, and the liquid inlet opening 1211 is used to supply brake fluid to enter and exit the brake chamber 171.
  • the friction plate 11 and the second transmission member 21 are arranged outside the piston cylinder 121, a part of the first transmission member 123 is arranged inside the piston cylinder 121, and another part of the first transmission member 123 is arranged outside the piston cylinder 121 and is in transmission connection with the second transmission member 21.
  • the piston cylinder 121 with such a structure can define a brake chamber 171 with a variable volume, and then the service brake can be achieved by controlling the volume of the brake fluid.
  • the piston cylinder 121 includes two openings opposite to each other along the first direction, the friction plate 11 is arranged at one of the openings of the piston cylinder 121 and is connected to the piston 122 through the opening, and the first transmission member 123 is transmission-connected to the second transmission member 21 through the other opening of the piston cylinder 121.
  • first transmission member 123 is suspended in the piston cylinder 121 and is movably connected to the inner wall of the piston cylinder 121 to ensure that the first transmission member 123 can rotate or move along the first direction.
  • the brake cavity 171 may be an annular cavity surrounding the axis of the piston 122, which helps to balance the force on the piston 122.
  • the brake cavity 171 is not limited to being an annular cavity.
  • the shape of the piston 122 can be a stepped shaft.
  • the piston 122 can include a coaxial first shaft section and a second shaft section.
  • the outer diameter of the first shaft section is greater than the outer diameter of the second shaft section, and one end of the first shaft section facing the brake disc 2 is fixedly connected to the friction plate 11.
  • the end of the second shaft section facing away from the first shaft section is transmission-connected to one end of the first transmission member 123.
  • the piston cylinder 121 may include a first shell 1214 and a second shell 1215 of a hollow structure.
  • the first shell 1214 and the second shell 1215 are coaxially arranged, and the first end of the first shell 1214 and the first end of the second shell 1215 are fixedly connected.
  • the first shell 1214 is located between the friction plate 11 and the second shell 1215, and the first shell 1214 and the second shell 1215 are respectively sleeved on the piston 122 and are respectively sealed and connected to the opposite ends of the piston 122.
  • the piston 122 and the end facing away from the friction plate 11 together with the inner wall of the piston cylinder 121 define a secondary cavity 172 with an opening.
  • the secondary cavity 172 can be used to accommodate the axial limit mechanism 16, the plane bearing 14, the retaining spring 15, etc., so as to improve the compactness of the brake 10.
  • the brake 10 may further include a first sealing ring 81 and a second sealing ring 82, which are respectively sleeved on opposite ends of the piston 122 and abut against the inner wall of the piston cylinder 121.
  • the first sealing ring 81 and the second sealing ring 82 can ensure the sealing of the brake cavity 171 under the premise that the piston 122 can move relative to the piston cylinder 121, so as to prevent the brake fluid in the brake cavity 171 from leaking.
  • a limiting structure 19 may be provided between the piston 122 and the piston cylinder 121.
  • the limiting structure 19 is used to position the relative positions of the piston 122 and the piston cylinder 121 when the piston 122 moves along a first direction, so that the volume of the brake chamber 171 is minimized, which helps to realize functions such as brake fluid replacement and exhaust.
  • the limiting structure 19 may include a volume limiting portion 191 and a volume matching portion 192 matching with the volume limiting portion 191.
  • the volume limiting portion 191 is arranged on the outer wall of the piston 122
  • the volume matching portion 192 is arranged on the inner wall of the piston cylinder 121.
  • the volume matching portion 192 cooperates with the volume limiting portion 191 to locate the relative position of the piston 122 and the piston cylinder 121 when the piston 122 moves away from the brake disc 2, so that the piston 122 is in the extreme position, so that the volume of the brake chamber 171 is minimized, which helps to realize the functions of brake fluid replacement and exhaust.
  • the specific structure of the volume limiter 191 is not limited here.
  • the structure of the volume limiter 191 can be determined according to the structure of the volume matching portion 192.
  • the volume matching portion 192 is a step provided on the inner wall of the piston cylinder 121, and the volume limiter 191 can be the end of the piston 122 facing away from the friction plate 11.
  • the piston 122 cannot continue to move to the right, the relative position of the piston 122 and the piston cylinder 121 remains unchanged, and the volume of the brake chamber 171 reaches the minimum.
  • the piston cylinder 121 further includes a The exhaust port 1213 is used to discharge the gas in the brake cavity 171 to ensure that the pressure in the brake cavity 171 is stable within a reasonable range.
  • the brake 10 also includes an exhaust member 18, which is used to control the opening and closing of the exhaust port 1213, so as to ensure the sealing of the brake cavity 171 when exhaust is not required.
  • the exhaust member 18 may be an exhaust bolt 181, which is inserted into the exhaust port 1213 and threadedly connected to the piston cylinder 121 to seal the exhaust port 1213.
  • the exhaust bolt 181 is used to seal the exhaust port 1213, and the cost of the exhaust member 18 can be reduced while controlling the opening and closing of the exhaust port 1213, thereby reducing the cost of the brake 10.
  • FIG8 is a cross-sectional view of the second brake system 3 provided in the embodiment of the present application. Therefore, in some embodiments, the exhaust bolt 181 can be replaced with an exhaust solenoid valve 182 (as shown in FIG8 ), and the exhaust solenoid valve 182 is connected to the exhaust port 1213 and is used to be electrically connected to the controller 40, and the controller 40 is used to control the on and off of the exhaust solenoid valve 182 to control the opening and closing of the exhaust port 1213, thereby achieving automatic exhaust without manual operation.
  • the brake 10 may further include a one-way valve 70 , through which the exhaust solenoid valve 182 is connected to the exhaust port 1213 , and the one-way valve 70 is used to allow the brake fluid in the brake chamber 171 to flow out of the exhaust port 1213 in one direction.
  • the brake 10 may further include a pressure sensor 60, which is used to output a pressure signal according to the pressure of the brake fluid.
  • a pressure sensor 60 which is used to output a pressure signal according to the pressure of the brake fluid. According to the pressure signal, functions such as hydraulic oil replacement and exhaust, redundant travel braking, and fault detection can be implemented.
  • the pressure sensor 60 may be arranged on a pipeline connecting the brake fluid device 30 and the fluid inlet opening 1211. Alternatively, the pressure sensor 60 may also be arranged in the brake cavity 171.
  • the brake 10 may further include a displacement sensor 50, which may be fixedly connected to the piston cylinder 121, and the displacement sensor 50 is used to output a displacement signal according to the movement of the first transmission member 123 along the first direction.
  • a displacement sensor 50 which may be fixedly connected to the piston cylinder 121, and the displacement sensor 50 is used to output a displacement signal according to the movement of the first transmission member 123 along the first direction.
  • functions such as running braking, pre-parking, and adjustment of the gap between the friction plate 11 and the brake disc 2 may be implemented.
  • the moving distance of the first transmission member 123 in the first direction can be detected, and the relative distance between the first transmission member 123 and the piston 122 in the first direction can be obtained based on the moving distance.
  • the gap between the brake disc 2 and the friction plate 11 can be obtained based on the relative distance between the first transmission member 123 and the piston 122, which helps to accurately control the gap between the friction plate 11 and the brake disc 2.
  • the specific arrangement position of the displacement sensor 50 is not limited here.
  • the position of the brake disc 2 since the position of the brake disc 2 remains unchanged and the piston cylinder 121 is fixedly connected to the vehicle body, the position of the piston cylinder 121 remains unchanged. Therefore, by measuring the change in the spacing between the first transmission member 123 and one end of the piston cylinder 121 in the first direction, the movement distance of the first transmission member 123 can be obtained, and then the position of the first transmission member 123 can be known. For example, as shown in FIG.
  • the displacement sensor 50 can be arranged inside the piston cylinder 121 and in the arrangement area of the inner wall of the piston cylinder 121, and the arrangement area is opposite to the end face of the piston 122 facing away from the friction plate 11 in the first direction.
  • the displacement sensor 50 By detecting the change in the spacing between the arrangement area and the end face of the piston 122 facing away from the friction plate 11 in the first direction by the displacement sensor 50, the relative spacing between the piston 122 and the first transmission member 123 can be calculated, and then the movement distance of the first transmission member 123 in the first direction can be obtained.
  • the number of friction plates 11 may be two.
  • the plates 11 are arranged on opposite sides of the brake disc 2, and one of the two friction plates 11 is fixedly connected to the piston 122, and the two friction plates 11 are connected.
  • the friction plate 11 also drives the other friction plate 11 to move along the first direction, so that the two friction plates 11 can move along the first direction respectively, and then the two friction plates 11 can clamp the brake disc 2.
  • the number of the friction plates 11 may also be one, which is not limited here.
  • connection between the piston 122 and the friction plate 11 can be threaded connection, clamping connection, etc., which are not limited here.
  • the friction plate 11 is fixedly connected to the piston 122 by screws.
  • the friction plate 11 may be circular in shape, and the axis of the friction plate 11 is parallel to the first direction.
  • the friction plate 11 may also be in other shapes, such as a rectangle or other irregular shapes. It is understood that the first direction is perpendicular to the surface of the friction plate 11 facing the piston 122.
  • the brake 10 may further include a housing 1216, the housing 1216 is fixedly connected to one end of the piston cylinder 121 facing away from the friction plate 11, and the housing 1216 includes a transmission opening 1212, and the transmission opening 1212 is used to connect the interior of the piston cylinder 121 and the interior of the housing 1216.
  • the housing 1216 may be used to accommodate the second transmission member 21 and the drive unit 22, and the second transmission member 21 is transmission-connected to the first transmission member 123 through the transmission opening 1212.
  • the drive unit 22 may include a motor, the motor shaft of the motor is connected to the second transmission member 21 of the brake 10.
  • the motor may include an angle sensor, which is used to output an angle signal according to the rotation angle and direction of the motor shaft of the motor.
  • the position of the piston 122 can be obtained according to the angle signal and the moving distance of the first transmission member 123, so that the position of the friction plate 11 can be obtained, and then the size of the gap between the friction plate 11 and the brake disc 2 can be known, which helps to improve the accuracy of adjusting the gap between the friction plate 11 and the brake disc 2.
  • the position of the first transmission member 123 can be accurately detected.
  • the position of the piston 122 can also be obtained.
  • the brake system 3 may further include a controller 40.
  • the controller 40 is electrically connected to the brake fluid device 30, the drive unit 22, and the brake 10, respectively.
  • the brake 10 can achieve different functions and meet different needs.
  • the controller 40 controls the brake fluid device 30 to control the brake fluid in and out of the brake cavity 171, so that the brake 10 can have a service brake function.
  • the controller 40 controls the action of the drive unit 22 to allow the first transmission member 123 to rotate, so that the brake 10 can have a clearance adjustment function between the friction plate 11 and the brake disc 2, a parking function, and the like.
  • the functions of the brake 10 are not limited to the above-mentioned functions.
  • the controller 40 may also be the controller 40 of the vehicle 1.
  • the controller 40 may also be a specially configured controller 40.
  • the function of the brake fluid device 30 is to inject brake fluid into the brake cavity 171 of the brake 10. Therefore, the specific structure of the brake fluid device 30 is not limited here.
  • the brake fluid device 30 may include a brake fluid pipeline 31, a first solenoid valve 32, a second solenoid valve 33 and an oil pot 34.
  • the first interface of the brake fluid pipeline 31 is used to be connected to the fluid inlet opening 1211 of the brake 10
  • the second interface of the brake fluid pipeline 31 is connected to the oil pot 34 through the first solenoid valve 32
  • the third interface of the brake fluid pipeline 31 is connected to the first interface of the second solenoid valve 33.
  • the second interface of the second solenoid valve 33 is used to supply brake fluid in and out of the brake fluid pipeline 31.
  • the first solenoid valve 32 By controlling the on and off of the first solenoid valve 32, the communication between the brake cavity 171 and the oil pot 34 can be achieved. Therefore, when the piston 122 moves with a large stroke and the volume of the brake chamber 171 increases, the brake chamber 171 can always be filled with brake fluid.
  • the brake fluid in the brake master cylinder (connected to the second interface of the second solenoid valve 33) can enter or flow out of the brake fluid pipeline 31 through the second solenoid valve 33, and then flow into the brake chamber 171 to achieve service braking.
  • the brake 10 may include a pressure sensor 60 for detecting the pressure of the brake fluid
  • the pressure sensor 60 may be arranged on the brake fluid pipeline 31, and the magnitude of the hydraulic driving force acting on the piston 122 may be obtained by detecting the pressure of the brake fluid in the brake fluid pipeline 31.
  • the brake system 3 includes a brake fluid device 30.
  • the brake system 3 may not include the brake fluid device 30, in which case the brake fluid device 30 may be the brake fluid device 30 of the vehicle 1, and correspondingly, the brake system 3 may include a drive unit 22 and a brake 10.
  • the brake system 3 since the brake system 3 has parts such as the exhaust member 18, the pressure sensor 60, the motor with the angle sensor and the displacement sensor 50, the brake system 3 can also have functions such as adaptive adjustment of the gap between the friction plate 11 and the brake disc 2, replacement and exhaust of the hydraulic oil, and follow-up braking.
  • the working principle of the brake system 3 provided in the embodiment of the present application is introduced below in combination with specific scenarios.
  • the brake fluid is injected into the brake cavity 171 through the brake fluid pipeline 31.
  • the piston 122 drives the first transmission member 123 to move leftward together, that is, the first transmission member 123 follows the piston 122 and only moves in translation, thereby achieving non-differential service braking.
  • the distance of the first transmission member 123 moving in translation to the left is controlled within a certain stroke, that is, the distance between the first transmission member 123 and the brake disc 2 is within a certain range, which can prevent the axial elastic part 161 from being compressed to the limit and unable to be used normally.
  • the displacement signal output by the displacement sensor 50 can monitor the translation distance of the first transmission member 123 in real time.
  • the driving unit 22 can drive the first transmission member 123 to rotate through the second transmission member 21, so that the relative distance between the first transmission member 123 and the piston 122 increases, so as to prevent the axial elastic portion 161 from being compressed to the limit.
  • the first solenoid valve 32 is controlled to be closed and the second solenoid valve 33 is turned on, and the brake fluid is injected into the brake chamber 171 through the brake fluid pipeline 31, and the piston 122 is pushed to the left.
  • the piston 122 moves to the left, it will drive the first transmission member 123 to move to the left together.
  • the control drive unit 22 drives the first transmission member 123 to rotate through the second transmission member 21, so that the relative distance between the first transmission member 123 and the piston 122 increases (for example, B in FIG3 ), so that the distance that the friction plate 11 needs to travel during the parking brake can be reduced, thereby shortening the parking brake time and improving the parking efficiency.
  • the distance that the first transmission member 123 moves to the left can be calculated based on the displacement signal output by the displacement sensor 50.
  • the control driving unit 22 drives the piston 122 to move leftward through the second transmission member 21 and the first transmission member 123, and the piston 122 pushes the friction plate 11 to move leftward until the friction plate 11 clamps the brake disc 2, thereby achieving parking braking.
  • the driving unit 22 drives the piston 122 to move rightward through the first transmission member 123 and the second transmission member 21, so that the friction plate 11 is no longer Clamp the brake disc 2 and release the parking brake.
  • FIG9 is a schematic diagram of the friction plate 11 when it is worn.
  • the surface of the friction plate 11 is worn (such as the rectangular dotted area in FIG9 ), resulting in an increase in the gap between the friction plate 11 and the brake disc 2, increasing the idle travel of the brake, increasing the braking time, and increasing the braking distance.
  • the braking feel will also change.
  • it may also be the surface wear of the brake disc 2, or both the friction plate 11 and the brake disc 2 may be worn.
  • the controller 40 controls the first solenoid valve 32 to be turned on and the second solenoid valve 33 to be turned off, so that the oil pot 34 is turned on with the brake chamber 171 and the brake fluid in the master cylinder and the brake chamber 171 is cut off.
  • the controller 40 controls the driving unit 22 to drive the first transmission member 123 to rotate through the second transmission member 21 according to the displacement signal output by the displacement sensor 50, so that the piston 122 moves to the right, so that the relative distance between the piston 122 and the first transmission member 123 increases, and the purpose of adjusting the gap between the friction plate 11 and the brake disc 2 is reduced.
  • the first solenoid valve 32 is closed to achieve the same gap between the friction plate 11 and the brake disc 2 in any non-braking state, so as to achieve the consistency of the basic brake idle stroke, shorten the problem of increased braking time and increased braking distance due to wear, and ensure that the driving experience does not change.
  • the moving distance of the friction plate 11 can be accurately controlled according to the displacement signal to ensure the gap between the friction plate 11 and the brake disc 2.
  • the brake fluid changes from high pressure to low pressure, and the brake disc 2 and the friction plate 11 will be automatically separated under the friction force between the friction plate 11 and the brake disc 2.
  • the friction plate 11 and the brake disc 2 cannot be separated quickly and at a constant distance, resulting in drag, wear and abnormal noise.
  • the controller 40 controls the first solenoid valve 32 to close and controls the second solenoid valve 33 to conduct, wherein the brake pedal signal refers to the signal of the brake pedal brake service brake release of the vehicle 1.
  • the drive unit 22 drives the piston 122 to move to the right through the first transmission member 123 and the second transmission member 21, so that the relative distance between the piston 122 and the first transmission member 123 is reduced, and the piston 122 is dragged back quickly.
  • the brake fluid in the brake cavity 171 will be driven to quickly return to the brake master cylinder (the second interface of the second solenoid valve 33 is connected to the brake master cylinder), which will accelerate the separation of the brake disc 2 and the friction plate 11, and realize the rapid separation of the friction plate 11 and the brake disc 2.
  • the gap between the friction plate 11 and the brake disc 2 can be accurately controlled, the basic brake drag torque can be reduced, and the energy consumption of the whole vehicle can be improved.
  • the moving distance of the piston 122 and the first transmission member 123 can be constantly monitored according to the displacement signal output by the displacement sensor 50.
  • the gap between the friction plate 11 and the brake disc 2 calculated according to the displacement signal should meet the non-contact condition, but the friction plate 11 and the brake disc 2 are still partially in contact.
  • the controller 40 When the controller 40 receives the displacement signal from the displacement sensor 50 and does not receive the brake signal output by the brake pedal of the vehicle 1, the controller 40 controls the second solenoid valve 33 to close, controls the first solenoid valve 32 to conduct, and controls the drive unit 22 to drive the piston 122 to translate to the right through the first transmission member 123 and the second transmission member 21, so that the relative distance between the first transmission member 123 and the piston 122 is reduced, thereby increasing the gap between the friction plate 11 and the brake disc 2.
  • the first solenoid valve 32 is controlled to close, and the second solenoid valve 33 is controlled to conduct. Thereby, the hydraulic volume inside the brake chamber 171 is adjusted, zero rolling resistance driving is achieved, running noise is reduced, braking energy consumption is reduced, and braking efficiency is improved.
  • FIG10 is a schematic diagram of foreign matter entering between the friction plate 11 and the brake disc 2 during driving. As shown in FIG10, during the driving process of the vehicle 1, once foreign matter enters between the brake disc 2 and the friction plate 11, the friction torque of the brake disc 2 will be increased, abnormal noise will be caused, and the surfaces of the brake disc 2 and the friction plate 11 will be damaged, thereby affecting the life of the friction plate 11 and the brake disc 2.
  • the controller 40 controls the drive unit 22 to work according to the displacement signal output by the displacement sensor 50, and the drive unit 22 drives the piston 122 to move rightward through the first transmission member 123 and the second transmission member 21, so that the relative spacing between the first transmission member 123 and the piston 122 is reduced, thereby increasing the gap between the brake disc 2 and the friction plate 11, and then the foreign matter can be discharged.
  • the distance that the piston 122 moves to the left is detected based on the displacement signal output by the displacement sensor 50, so that after the service braking is released, the relative distance between the piston 122 and the first transmission member 123 is adjusted so that the gap between the friction plate 11 and the brake disc 2 is at a preset gap value, thereby realizing the entire process of foreign matter discharge and restoration of normal operating state, improving noise during operation, reducing energy loss, improving braking effect, avoiding damage to components, and extending the service life of components.
  • the controller 40 controls the drive unit 22 to drive the piston 122 to move to the right through the first transmission member 123 and the second transmission member 21, increasing the gap between the friction plate 11 and the brake disc 2 to facilitate the replacement of the friction plate 11.
  • the controller 40 controls the drive unit 22 to output the driving force transmitted to the brake 10, and the brake 10 performs parking braking.
  • the controller 40 recalculates the reasonable gap between the friction plate 11 and the brake disc 2 according to the displacement signal output by the displacement sensor 50, realizes automatic gap adjustment and calibration, so that even if the thickness of the replaced friction plate 11 is inconsistent, it can ensure that the gap between the brake disc 2 and the friction plate 11 is consistent before and after the replacement, and ensure that the driving experience does not change.
  • the brake system 3 In the event of service brake failure, that is, after the brake pedal of the vehicle 1 sends a pressure-building signal, when the pressure sensor 60 detects that the pressure of the brake fluid has not changed, the brake system 3 will automatically perform diagnosis and detection.
  • the process of diagnosis and detection of the brake system 3 is as follows: the controller 40 controls the drive unit 22 to drive the piston 122 to move rightward through the first transmission member 123 and the second transmission member 21, thereby reducing the volume of the brake chamber 171.
  • the controller 40 determines whether the pipeline of the brake fluid device 30 is leaking according to the pressure signal output by the pressure sensor 60, the displacement signal output by the displacement sensor 50, the angle signal output by the angle sensor and other parameters, and feeds back relevant fault information to the driver.
  • the controller 40 controls the first solenoid valve 32 to be turned on, ensuring that the oil pot 34 is connected to the brake chamber 171, and at the same time enters the redundant service brake function.
  • the matching of the pressure signal and the displacement signal refers to the corresponding change in the pressure of the brake fluid and the moving distance of the piston 122.
  • the controller 40 controls the drive unit 22 to drive the first transmission member 123 to work according to the displacement signal output by the displacement sensor 50, the pressure signal output by the pressure sensor 60, the angle signal output by the angle sensor, the wheel speed signal output by the wheel speed sensor of the vehicle 1, and other signals, so that the piston 122 moves in translation. Realize the service braking requirements.
  • the service braking state is monitored, so that the driving force output by the drive unit 22 can temporarily replace the hydraulic driving force output by the brake fluid device 30 to achieve the basic function of service braking.
  • the driving force output by the drive unit 22 can be adjusted according to the wheel speed signal to avoid locking of the brake wheel 5 and increase the safety of the braking system 3.
  • the hydraulic oil replacement and exhaust function is entered: as shown in FIG3 , the exhaust bolt 181 is opened, and the drive unit 22 drives the piston 122 to move rightward through the first transmission member 123 and the second transmission member 21, so that the volume of the brake chamber 171 is minimized, and the exhaust bolt 181 is closed.
  • the oil change process is performed: the controller 40 controls the first solenoid valve 32 to open so that the oil pot 34 is connected to the brake chamber 171, and the controller 40 controls the drive unit 22 to drive the piston 122 to move leftward through the first transmission member 123 and the second transmission member 21, and extracts the brake fluid in the oil pot 34 into the brake chamber 171, and the brake fluid will push the piston 122 to move leftward.
  • the first solenoid valve 32 is controlled to be closed, and the drive unit 22 is controlled to drive the piston 122 to move rightward through the first transmission member 123 and the second transmission member 21, so that the pressure in the brake chamber 171 increases.
  • the pressure sensor 60 detects that the pressure value in the brake chamber 171 reaches the set exhaust pressure value, the exhaust bolt 181 is loosened to exhaust the gas in the brake chamber 171.
  • the piston 122 continues to move to the right for a distance to discharge part of the brake fluid in the brake chamber 171, thereby completely exhausting the gas in the brake chamber 171.
  • the controller 40 controls the drive unit 22 to drive the piston 122 to continue to reciprocate in the first direction through the first transmission member 123 and the second transmission member 21, and calculates and compares the pressure in the brake chamber 171 with the movement stroke of the piston 122 to ensure complete exhaust and replacement of the brake fluid.
  • the controller 40 controls the exhaust solenoid valve 182 to open, and the brake chamber 171 is connected to the outside.
  • the controller 40 controls the drive unit 22 to drive the piston 122 to move rightward through the first transmission member 123 and the second transmission member 21 until the volume of the brake chamber 171 is the smallest, that is, the piston 122 reaches the rightmost side, so that the air in the brake chamber 171 is discharged.
  • the controller 40 controls the exhaust solenoid valve 182 to close so that the brake chamber 171 is closed from the outside, and at the same time controls the first solenoid valve 32 to open so that the oil pot 34 is connected to the brake chamber 171.
  • the controller 40 controls the drive unit 22 to drive the piston 122 to move leftward through the first transmission member 123 and the second transmission member 21, and pumps the brake fluid in the oil pot 34 into the brake chamber 171, so as to automatically fill the brake fluid.
  • the controller 40 controls the exhaust solenoid valve 182, the first solenoid valve 32 and the second solenoid valve 33 to be closed, and controls the drive unit 22 to drive the piston 122 to move rightward through the first transmission member 123 and the second transmission member 21.
  • the embodiment of the present application further provides a control method for the brake system 3 in the above content, and the control method may include:
  • the service brake signal indicates that the vehicle 1 needs to be braked.
  • the acquisition of the service brake signal can be based on whether the pedal mechanism of the vehicle 1 outputs a pressure-building signal or the brake fluid
  • the current relative distance can be calculated based on the displacement signal output by the displacement sensor 50.
  • the first solenoid valve 32 of the brake fluid device 30 is controlled to be closed and the second solenoid valve 33 is turned on, so that the brake fluid can be injected into the brake cavity 171 to push the piston 122 to drive the friction plate 11 to clamp the brake disc 2, thereby achieving service brake.
  • the hydraulic driving force acts on the piston 122 through the brake fluid.
  • the control driving unit 22 drives the first transmission member 123 to rotate through the second transmission member 21 until the current relative spacing becomes the first target relative spacing.
  • the piston 122 is used to receive the hydraulic driving force and drive the first transmission member 123 to move along the first direction.
  • the brake system 3 can achieve the accompanying pre-parking function.
  • a control method provided in an embodiment of the present application may further include:
  • the driving abnormality signal is used to indicate whether the friction plate 11 and the brake disc 2 are in abnormal contact during the driving process of the vehicle 1, wherein whether the friction plate 11 and the brake disc 2 are in abnormal contact can be calculated based on the current relative spacing between the first transmission member 123 and the piston 122.
  • the judgment signal is used to indicate whether the pedal mechanism of the vehicle 1 outputs a brake signal.
  • the first solenoid valve 32 is controlled to be turned on and the second solenoid valve 33 is controlled to be turned off.
  • the driving unit 22 is controlled to drive the first transmission member 123 to rotate through the second transmission member 21 until the current relative distance becomes the second target relative distance, and the first solenoid valve 32 of the brake fluid device 30 is controlled to be closed and the second solenoid valve 33 is controlled to be turned on.
  • the drive unit 22 is controlled to work so that the gap between the friction plate 11 and the brake disc 2 increases. Therefore, by including S21, S22 and S23, the brake system 3 can achieve a zero rolling resistance function.
  • a control method provided in an embodiment of the present application may further include:
  • the service brake release signal refers to a signal indicating whether the brake system 3 has finished applying service brakes to the vehicle 1 .
  • the first solenoid valve 32 of the brake fluid device 30 is controlled to be closed and the second solenoid valve 33 is controlled to be turned on.
  • the first solenoid valve 32 is controlled to be closed and the second solenoid valve 33 is controlled to be turned on.
  • the driving unit 22 is controlled to work, so that the relative distance between the first transmission member 123 and the piston 122 is reduced, the piston 122 is quickly retracted, and the friction plate 11 can be quickly separated from the brake disc 2. Therefore, by including S31, S32 and S33, the brake system 3 can achieve a low-drag fast reset function.
  • a control method provided in an embodiment of the present application further includes:
  • the fault indication signal is used to indicate whether a fault occurs in the brake fluid device 30 , and the control parameters include a pressure signal, a displacement signal and an angle signal.
  • the brake system 3 enters the redundant service braking mode.
  • the drive unit 22 is controlled to work according to the control parameters to achieve service braking and ensure the safety of the vehicle 1.
  • the service braking state can be monitored to avoid locking during the redundant service braking process. Therefore, by including S41 and S42, the brake system 3 can achieve the redundant service braking function.
  • a control method provided by the embodiment of the present application may further include:
  • the service brake failure signal refers to that the brake pedal of the vehicle 1 sends a pressure building signal, but the pressure of the brake fluid of the brake system 3 remains unchanged.
  • whether the brake fluid device 30 is faulty is determined based on the displacement signal and the pressure signal.
  • the moving distance of the piston 122 is calculated based on the displacement signal. If the moving distance of the piston 122 matches the pressure value corresponding to the pressure signal, the brake fluid device 30 is not damaged. If the moving distance of the piston 122 does not match the pressure value corresponding to the pressure signal, the brake fluid device 30 is faulty.
  • a control method provided in an embodiment of the present application may further include:
  • the parking brake signal refers to whether the vehicle 1 is in a parking state
  • the gap abnormality signal refers to the friction
  • the gap between the plate 11 and the brake disc 2 is greater than the adjustment threshold.
  • the first solenoid valve 32 is controlled to be turned on and the second solenoid valve is controlled to be turned off.
  • control the driving unit 22 to drive the first transmission member 123 to rotate through the second transmission member 21 until the current relative distance becomes the fourth target relative distance, and control the first solenoid valve 32 of the brake fluid device 30 to close.
  • the moving distance of the piston 122 during the parking brake process can be monitored according to the current relative spacing, so that the gap size between the friction plate 11 and the brake disc 2 can be obtained, and then it can be obtained whether the gap between the friction plate 11 and the brake disc 2 is greater than the adjustment threshold.
  • the control drive unit 22 is operated so that the current relative spacing between the piston 122 and the first transmission member 123 becomes the fourth target spacing to reduce the gap between the friction plate 11 and the brake disc 2.
  • the first solenoid valve 32 is closed, so that the gap between the friction plate 11 and the brake disc 2 is always the same in any non-braking state, and the consistency of the basic braking idle stroke is achieved. Therefore, by including S51, S52 and S53, the braking system 3 can realize the adaptive adjustment function of the brake caliper distance.
  • a control method provided in an embodiment of the present application may further include:
  • the way of opening or closing the exhaust port 1213 depends on the specific structure of the exhaust member 18 that seals the exhaust port 1213.
  • the exhaust member 18 is an exhaust bolt 181
  • the exhaust port 1213 is opened or closed manually.
  • the exhaust member 18 is an exhaust solenoid valve 182
  • the exhaust port 1213 can be opened or closed automatically.
  • the brake fluid in the brake cavity 171 can be discharged through step S61, and part of the air in the brake cavity 171 can also be discharged.
  • the first solenoid valve 32 of the brake fluid device 30 is controlled to be turned on, and the drive unit 22 is controlled to drive the first transmission member 123 to rotate through the second transmission member 21, until the volume of the brake chamber 171 reaches the maximum, and the first solenoid valve 32 is controlled to be closed.
  • the brake fluid in the oil pot 34 of the brake fluid device 30 can be pumped into the brake cavity 171, so that the brake fluid can be replaced.
  • the current pressure value can be obtained according to the pressure signal output by the pressure sensor 60.
  • the driving unit 22 drives the first transmission member 123 to rotate, which can reduce the volume in the brake cavity 171 and increase the pressure value in the brake cavity 171.
  • the exhaust port 1213 is controlled to be opened, until the current pressure value decreases to the target pressure value, and the exhaust port 1213 is controlled to be closed.
  • the brake system 3 can realize hydraulic oil replacement and exhaust. Function.
  • step S65 in order to exhaust the gas in the brake chamber 171 as much as possible, after the current pressure value is reduced to the target pressure value, step S65 can also be included: controlling the drive unit 22 to drive the first transmission member 123 to rotate through the second transmission member 21 until the moving distance of the piston 122 reaches the target distance, and controlling the exhaust port 1213 to close.
  • a control method provided in an embodiment of the present application may further include:
  • the driving signal is used to indicate whether the vehicle 1 is in a driving state.
  • the control drive unit 22 operates so that the current gap value becomes the target gap value, thereby increasing the gap between the friction plate 11 and the brake disc 2, and foreign matter between the friction plate 11 and the brake disc 2 can be discharged.
  • the target gap value is greater than the preset gap value, which means that the gap between the friction plate 11 and the brake disc 2 is increased, so that the size of the foreign matter is smaller than the gap between the friction plate 11 and the brake disc 2. Therefore, by including S71 and S72, the brake system 3 can realize the function of discharging foreign matter while driving.
  • the embodiment of the present application also provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by the processor, they are used to implement the control method of the above-mentioned braking system 3.
  • the computer-readable storage medium may include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.
  • the embodiment of the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the control method of the above-mentioned braking system 3 is implemented.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Braking Arrangements (AREA)

Abstract

一种控制方法、制动器(10)、制动系统(3)、车辆(1)、存储介质及产品,其中,制动器(10)包括摩擦片(11)、活塞缸(121)、活塞(122)、第一传动件(123)和第二传动件(21)。活塞缸(121)和活塞(122)共同围成容纳制动液的制动腔体(171)。活塞(122)的两端分别与摩擦片(11)和第一传动件(123)的一端相连,第二传动件(21)用于传动连接第一传动件(123)的另一端和驱动单元(22)。制动液推动活塞(122)移动的过程中,驱动单元(22)通过第二传动件(21)带动第一传动件(123)沿第一方向远离活塞(122)运动,使得第一传动件(123)和活塞(122)之间的相对间距增加,从而在行车制动结束后可以减小摩擦片(11)和制动盘(2)之间的间隙。

Description

控制方法、制动器、制动系统、车辆、存储介质及产品 技术领域
本申请涉及制动技术领域,特别涉及一种控制方法、制动器、制动系统、车辆、存储介质及产品。
背景技术
制动系统是车辆的重要组成部分之一,制动系统直接关系到车辆的综合性能以及生命财产的安全。其中,制动系统的主要功能是使行驶中的车辆减速甚至停车、使下坡行驶的车辆速度保持稳定、使已停驶的车辆保持不动。
相关技术中的制动系统包括电控行车制动模块和电控驻车制动模块。电控行车制动模块用于控制车辆速度、甚至停车。电控驻车制动模块用于使停驶的车辆保持不动。电控停车制动模块的电机通过丝杠部驱动活塞运动,使得摩擦片抱紧车辆的制动盘,从而实现驻车制动。电控行车制动模块通过控制制动液推动活塞运动,使得摩擦片抱紧车辆的制动盘,从而实现行车制动。
然而,现有的制动系统存在驻车制动时间较长的问题。
发明内容
本申请实施例提供一种控制方法、制动器、制动系统、车辆、存储介质及产品,可以在行车制动的过程中调整摩擦片与制动盘之间的间隙,使得驻车制动行程减小,进而降低驻车制动时间。
本申请第一方面提供一种制动器,包括摩擦片、活塞、活塞缸、第一传动件和第二传动件。所述活塞设置于所述活塞缸的内部,所述活塞的一端与所述第一传动件相连,所述活塞的另一端与所述摩擦片固定连接,所述摩擦片设置于所述活塞缸的外部。所述第二传动件与所述第一传动件传动连接,所述第二传动件用于与驱动单元相连,所述驱动单元用于带动所述第二传动件绕平行于第一方向的转动轴线旋转。所述第一传动件用于将所述第二传动件的旋转运动转换为所述活塞沿所述第一方向的直线运动,当所述第一传动件沿所述第一方向移动时,所述第一传动件与所述第二传动件始终传动连接、且与所述活塞始终相连。
本申请实施例的制动器在进行行车制动的过程中,利用制动液推动活塞带动摩擦片朝向车辆的制动盘移动,使得摩擦片夹紧制动盘,实现行车制动。在行车制动的过程中,利用驱动单元输出的驱动力通过第二传动件带动第一传动件相对于活塞移动,由于此时制动液处于高压状态,从而活塞的位置保持不动,进而第一传动件可以沿第一方向远离活塞运动,使得活塞与第一传动件的相对间距增加,因而在行车制动结束后可以减小摩擦片与制动盘之间的间隙。因此,在进行驻车制动时,摩擦片朝向制动 盘行进的距离可以变小,从而驻车制动行程减小,进而可以降低驻车制动时间,提升驻车效率。
在一种可能的实施方式中,所述活塞背向所述摩擦片的一端包括配合孔,所述第一传动件包括丝杠部,所述丝杠部的轴线平行于所述第一方向,所述丝杠部的一端设置于所述配合孔的内部并与所述活塞相连,所述丝杠部的另一端与所述第二传动件传动连接。
利用丝杠部可以将转动转换为直线转动,从而丝杠部可以带动活塞沿第一方向移动、丝杠部可以相对于活塞沿第一方向移动,因而可以实现驻车制动、调整摩擦片和制动盘的间隙等目的。
在一种可能的实施方式中,所述丝杠部的一端与所述活塞螺纹连接。或者,所述丝杠部的一端与所述活塞用于构成滚珠丝杠机构。
如此设置,在行车制动过程中,活塞可以带动丝杠部沿第一方向移动,或者,丝杠部接收到第二传动件传递的驱动力后可以转动,使得活塞和丝杠部之间的相对间距发生变化,从而摩擦片和制动盘之间的间距可调。另外,在制动液没有推动活塞移动、且丝杠部转动时,丝杠部可以带动活塞沿第一方向作直线移动,从而可以实现驻车制动、摩擦片快速复位、零滚阻行车、行车异物排出等功能。
在一种可能的实施方式中,所述第二传动件包括贯穿所述第二传动件的花键孔,所述花键孔的轴线平行于所述第一方向。所述第一传动件靠近所述第二传动件的一端设置于所述花键孔内并与所述第二传动件花键连接。
如此设置,第一传动件可以在第二传动件的内部沿第一方向滑动,从而第一传动件可以随活塞一起移动、或者第一传动件可以相对于活塞在第二传动件的内部作轴向滑动。另外,在第一传动件的周向上,第一传动件与第二传动件相互配合,使得第二传动件能够带动第一传动件转动,确保第一传动件可以自转、并可以相对于活塞作轴向移动。
在一种可能的实施方式中,所述第一传动件靠近所述第二传动件的一端的外壁包括多个第一凹槽,每个所述第一凹槽沿所述第一方向延伸,所述多个第一凹槽沿所述第一传动件的周向间隔设置。所述第二传动件包括多个滚珠件和第三传动件,所述第三传动件套设于所述第一传动件的外壁并用于与所述驱动单元相连,所述第三传动件朝向所述第一传动件的内表面包括多个第二凹槽,每个所述第二凹槽沿所述第二传动件的轴向延伸,所述多个第二凹槽沿所述第二传动件的周向间隔设置,所述多个第二凹槽分别与所述多个第一凹槽和所述多个滚珠件一一对应,每个所述滚珠件的相对两端分别设置于相对应的所述第一凹槽的内部和所述第二凹槽的内部。
如此设置,第一传动件可以在第二传动件的内部沿第一方向滑动,从而第一传动件可以随活塞一起移动、或者第一传动件可以相对于活塞在第二传动件的内部作轴向滑动。另外,在第一传动件的周向上,第一传动件与第二传动件相互配合,使得第二传动件能够带动第一传动件转动,确保第一传动件可以自转、并可以相对于活塞作轴向移动。另外,采用如此结构的第二传动件,可以减小第一传动件和第二传动件之间的摩擦力,进而可以减小第一传动件在第二传动件内部滑动的阻力。
在一种可能的实施方式中,所述制动器还包括平面轴承,所述平面轴承设置于所 述活塞缸的内部并与所述活塞缸固定连接,所述平面轴承套设于所述第一传动件的外壁并与所述第一传动件活动连接。所述第一传动件包括沿所述第一传动件的径向延伸的第一延伸部,沿所述第一方向所述第一延伸部设置于所述平面轴承和所述活塞之间,所述第一延伸部用于与所述平面轴承朝向所述活塞的一端的端面抵接。
通过平面轴承,可以保证第一传动件相对于活塞缸平顺转动。另外,在第一传动件带动活塞沿第一方向移动的过程中,活塞缸通过平面轴承沿第一方向轴向支撑第一传动件,从而第一传动件可以承受足够的轴向载荷,使得活塞可以朝向制动盘移动。
在一种可能的实施方式中,所述制动器还包括轴向限位机构,所述轴向限位机构设置于所述活塞缸的内部。所述第一传动件沿所述第一方向移动时,所述轴向限位机构用于避免所述第一传动件沿所述第一方向发生窜动。
在一种可能的实施方式中,所述轴向限位机构包括轴向配合部和轴向弹性部,所述轴向配合部固定连接于所述活塞缸的内壁,所述轴向弹性部的轴线平行于所述第一传动件的轴线,所述轴向弹性部的相对两端分别与所述轴向配合部和所述第一传动件的外壁相连。通过轴向弹性部的弹力,可以避免第一传动件沿第一方向发生窜动。
在一种可能的实施方式中,所述轴向配合部和所述轴向弹性部的数量均为多个,多个所述轴向配合部和多个所述轴向弹性部一一对应,多个轴向配合部沿所述第一传动件的周向间隔设置,多个所述轴向弹性部沿所述第一传动件的周向间隔设置。所述第一传动件包括沿所述第一传动件的径向延伸的第二延伸部,所述第二延伸部沿所述第一方向用于设置于所述活塞和所述第一传动件的第一延伸部之间,所述轴向配合部位于所述活塞和所述第二延伸部之间,每个所述轴向弹性部的相对两端分别与所述第二延伸部和相对应的所述轴向配合部相连。
在一种可能的实施方式中,所述轴向配合部和所述轴向弹性部的数量均为多个,多个所述轴向配合部和多个所述轴向弹性部一一对应,多个轴向配合部沿所述第一传动件的周向间隔设置,多个所述轴向弹性部沿所述第一传动件的周向间隔设置,每个所述轴向配合部沿所述第一方向设置于所述第一传动件的第一延伸部和所述活塞之间,每个所述轴向弹性部的两端分别与所述第一延伸部和相对应的所述轴向配合部相连。
在一种可能的实施方式中,所述制动器还包括导向机构,所述导向机构的一部分设置于所述活塞缸,所述导向机构的另一部分设置于所述第一传动件,所述导向机构用于使所述活塞沿所述第一方向平动。
如此设置,在制动液没有推动活塞且第一传动件转动时,可以驱动活塞沿第一方向移动,使得摩擦片可以朝向或背向制动盘移动,实现驻车制动、调节摩擦片与制动之间的间隙、摩擦片快速复位、零滚阻行车、行车异物排出等功能。
在一种可能的实施方式中,所述导向机构设置于所述活塞缸的内部,所述导向机构的一部分设置于所述活塞缸的内壁,所述导向机构的另一部分设置于所述第一传动件的外壁。
通过将导向机构设置于活塞缸的内部,有助于提高制动器的结构紧凑性,进而可以减小制动器的体积。
在一种可能的实施方式中,所述导向机构包括至少一组导向组,每组所述导向组包括一个导向块和一个导向槽,每组所述导向组的所述导向块和所述导向槽中的其中 一个设置在所述活塞缸的内壁上、另一个设置在所述活塞的外壁上。
如此设置,活塞不会绕平行于第一方向的转动轴线发生转动,从而第一传动件转动时可以带动活塞沿第一方向平动。
在一种可能的实施方式中,所述活塞缸为中空结构,所述活塞缸的轴线平行于所述摩擦片的轴线。所述活塞的外壁与所述活塞缸的内壁共同限定出容积可变的制动腔体,所述活塞缸包括与所述制动腔体连通的进液开口,所述进液开口用于供制动液进出所述制动腔体。所述摩擦片和所述第二传动件设置于所述活塞缸的外部,所述第一传动件的一部分设置于所述活塞缸的内部,所述第一传动件的另一部分设置于所述活塞缸的外部并与所述第二传动件传动连接。
采用如此结构的活塞缸,在实现利用制动液推动活塞的前提下,有助于减小制动器的体积。
在一种可能的实施方式中,所述活塞与所述活塞缸之间设置有限位结构,所述限位结构用于在所述活塞沿所述第一方向移动时定位所述活塞和所述活塞缸的相对位置,使得所述制动腔体的容积最小。
如此设置,可以在活塞背向制动盘移动时,定位活塞和活塞缸的相对位置,使得活塞处于极限位置,从而制动腔体的容积最小,有助于实现制动液更换、排气等功能。
在一种可能的实施方式中,所述活塞缸还包括与所述制动腔体连通的排气口,所述排气口用于导出所述制动腔体内的气体。所述制动器还包括排气件,所述排气件用于控制所述排气口的开闭。
通过排气件控制排气口的导通或关闭,可以将制动腔体内的气体排出,使得制动腔体内可以充满制动液。
在一种可能的实施方式中,所述排气件为排气螺栓,所述排气螺栓插设于所述排气口内并与所述活塞缸螺纹连接。
如此设置,在实现控制排气口的开闭的前提下,可以降低排气件的成本。
在一种可能的实施方式中,所述排气件为排气电磁阀,所述排气电磁阀与所述排气口相连并用于与控制器电连接,所述控制器用于控制所述排气电磁阀的通断以控制所述排气口的开闭。
如此设置,可以无需人工控制排气口的开闭,有助于实现自动排气。
在一种可能的实施方式中,所述制动器还包括压力传感器,所述压力传感器用于根据所述制动液的压力输出压力信号。
通过压力传感器检测制动液的压力大小,有助于实现液压油更换与排气、冗余行程制动以及故障检测等功能。
在一种可能的实施方式中,所述制动器还包括位移传感器,所述位移传感器固定连接于所述活塞缸,所述位移传感器用于根据所述第一传动件沿所述第一方向的移动输出位移信号。
通过位移传感器,可以检测第一传动件在第一方向上的移动距离,根据移动距离可以得到第一传动件和活塞在第一方向上的相对间距,根据第一传动件和活塞的相对间距可以得到制动盘和摩擦片之间的间隙,有助于精确控制摩擦片和制动盘之间的间隙。
本申请第二方面提供一种制动系统,包括驱动单元和如第一方面任一项所述的制动器,所述驱动单元与所述制动器的第二传动件相连。
在一种可能的实施方式中,所述驱动单元包括电机,所述电机的电机轴与所述制动器的所述第二传动件相连:所述电机包括角度传感器,所述角度传感器用于根据所述电机的电机轴的转动角度和转向输出角度信号。
根据角度信号和第一传动件的移动距离可以得到活塞的位置,从而可以得到摩擦片的位置,进而可以知道摩擦片与制动盘之间的间隙的大小,有助于提高调整摩擦片和制动盘之间的间隙的精度。另外,还可以实现第一传动件位置的精确检测。
在一种可能的实施方式中,所述制动系统还包括制动液装置,所述制动液装置与所述制动器的进液开口相连通,所述制动液装置用于控制制动液进出所述制动器的制动腔体,从而可以实现行车制动、液压油更换与排气等功能。
在一种可能的实施方式中,所述制动液装置包括制动液管路、第一电磁阀、第二电磁阀和油壶。所述制动液管路的第一接口用于与所述制动器的进液开口相连通,所述制动液管路的第二接口通过所述第一电磁阀与所述油壶相连通,所述制动液管路的第三接口与所述第二电磁阀的第一接口相连通。所述第二电磁阀的第二接口用于供制动液进出所述制动液管路。
通过控制第一电磁阀的通断,可以实现制动腔体与油壶的连通,从而在活塞进行大行程移动而使得制动腔体的容积变大时,可以使制动腔体内始终有满腔的制动液。
在一种可能的实施方式中,所述制动系统还包括控制器,所述控制器分别所述驱动单元和所述制动器电连接、且用于与制动液装置电连接。
如此设置,控制器可以根据角度信号、压力信号和位移信号等信号控制制动器、制动液装置和驱动单元,实现行车制动、驻车制动、间隙调整等功能。
本申请第三方面提供一种车辆,包括车轮以及如第二方面任一项所述的制动系统,所述制动系统用于制动车轮。
本申请第四方面提供一种控制方法,应用于制动系统,所述制动系统包括制动液装置、驱动单元和第一方面所述的制动器,其中:所述制动器包括摩擦片、活塞、第一传动件和第二传动件,所述摩擦片和所述活塞沿所述第一方向并排设置,所述活塞的一端与所述摩擦片固定连接,所述活塞的另一端与所述第一传动件相连,所述第一传动件与所述第二传动件传动连接,所述第二传动件与所述驱动单元相连;
所述控制方法包括:
获取行车制动信号、预设相对间距以及所述第一传动件与所述活塞之间的当前相对间距;其中,所述行车制动信号指的是需要对车辆进行行车制动;
根据所述行车制动信号控制所述制动液装置输出作用于所述活塞的液压驱动力,实现行车制动;
根据所述当前相对间距和所述预设相对间距控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前相对间距变为第一目标相对间距。
在一种可能的实施方式中,根据所述当前相对间距和所述预设相对间距控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前相对间距变为第一目标相对间距,包括:
当所述当前相对间距小于或等于预设相对间距时,控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前相对间距变为第一目标相对间距;
当所述当前相对间距大于预设相对间距时,所述活塞用于接收液压驱动力并带动所述第一传动件沿所述第一方向移动。
在一种可能的实施方式中,所述制动液装置包括制动液管路、第一电磁阀、第二电磁阀和油壶,所述制动液管路的第一接口与所述制动器的进液开口相连通,所述制动液管路的第二接口通过所述第一电磁阀与所述油壶相连通,所述制动液管路的第三接口与所述第二电磁阀的第一接口相连通,所述第二电磁阀的第二接口用于供制动液进出所述制动液管路;
所述控制方法还包括:
获取到行车异常信号和判断信号;其中,所述行车异常信号用于指示车辆行车过程中摩擦片与制动盘是否接触异常,所述判断信号用于指示所述车辆的踏板机构是否输出制动信号;
根据所述行车异常信号和所述判断信号控制所述制动液装置的所述第一电磁阀导通、所述第二电磁阀关闭;
根据所述行车异常信号和所述判断信号控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前相对间距变为第二目标相对间距、并控制所述制动液装置的所述第一电磁阀关闭、所述第二电磁阀导通。
在一种可能的实施方式中,所述控制方法还包括:
获取行车制动解除信号,其中,所述行车制动解除信号指的是所述制动系统对车辆进行行车制动是否结束的信号;
根据所述行车制动解除信号控制所述制动液装置的第一电磁阀关闭、第二电磁阀导通;
根据所述行车制动解除信号控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前相对间距变为第三目标相对间距。
在一种可能的实施方式中,所述驱动单元包括具有角度传感器的电机,所述角度传感器在所述电机工作时输出角度信号,所述制动器还包括压力传感器和位移传感器,所述压力传感器用于根据制动液的压力输出压力信号,所述位移传感器用于根据所述第一传动件沿所述第一方向的移动输出位移信号;
所述控制方法还包括:
获取故障指示信号和控制参数;其中,所述故障指示信号用于指示所述制动液装置是否发生故障,所述控制参数包括所述压力信号、所述位移信号和所述角度信号;
根据所述故障指示信号和所述控制参数控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,以实现冗余行车制动。
在一种可能的实施方式中,在所述获取故障指示信号和控制参数之前,还包括:
获取到行车制动失效信号时控制所述制动器的制动腔体的容积缩小、并获取当前的所述位移信号、所述压力信号和所述角度信号;其中,所述行车制动失效信号指的是车辆的制动踏板发出建压信号,但所述制动系统的制动液的压力保持不变;
根据所述当前的所述位移信号、所述压力信号和所述角度信号中的至少两个生成 所述故障指示信号。
在一种可能的实施方式中,所述控制方法还包括:
获取驻车制动信号和间隙异常信号;其中,驻车制动信号指的是车辆是否处于驻车状态,间隙异常信号指的是摩擦片与制动盘之间的间隙大于调整阈值;
根据所述驻车制动信号控制制动液装置的第一电磁阀导通、第二电磁关闭;
根据所述驻车制动信号和所述间隙异常信号控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前相对间距变为第四目标相对间距、并控制所述制动液装置的所述第一电磁阀关闭。
在一种可能的实施方式中,所述控制方法还包括:
获取到液压油更换与排气信号时控制所述制动腔体的排气口打开、并控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述制动腔体的容积达到最小、并控制所述制动腔体的排气口关闭;
在所述制动腔体的容积达到最小时控制所述制动液装置的第一电磁阀导通、并控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述制动腔体的容积达到最大、并控制所述第一电磁阀关闭;
控制所述驱动单元通过所述第二传动件带动所述第一传动件转动、并获取所述制动腔体内的当前压力值;
根据所述当前压力值和预设排气压力值控制所述排气口打开,直至所述当前压力值降低为目标压力值、并控制所述排气口关闭。
在一种可能的实施方式中,在所述当前压力值降低为目标压力值之后,还包括:
控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述活塞的移动距离为目标距离、并控制所述排气口关闭。
在一种可能的实施方式中,所述控制方法还包括:
获取行车信号、所述摩擦片和制动盘之间的预设间隙值、所述摩擦片和制动盘之间的当前间隙值;其中,所述行车信号用于表明车辆是否处于行车状态;
根据所述行车信号、所述当前间隙值和预设间隙值控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前间隙值变为目标间隙值。
本申请第五方面提供一种计算机可读存储介质,所述计算机可读存储介质中存储有计算机执行指令,所述计算机执行指令被处理器执行时用于实现如第四方面任一项所述的方法。
本申请第六方面提供一种计算机程序产品,其包括计算机程序,该计算机程序被处理器执行时实现第四方面任一项所述的方法。
附图说明
图1为本申请实施例提供的一种车辆的结构示意图;
图2为相关技术中的一种制动系统的结构示意图;
图3为本申请实施例提供的第一种制动系统的剖面图;
图4为摩擦片和制动盘之间的间隙与活塞和第一传动件之间的相对间距的示意图;
图5为本申请实施例提供的第一传动件与第二传动件传动连接的一种结构的剖面 图;
图6为本申请实施例提供的第一传动件与第二传动件传动连接的另一种结构的剖面图;
图7为图3中A处的局部放大图;
图8为本申请实施例提供的第二种制动系统的剖面图;
图9为摩擦片出现磨损时的示意图;
图10为行车过程中异物进入摩擦片和制动盘之间的示意图。
附图标记说明:
1、车辆;
2、制动盘;
3、制动系统;
10、制动器;
11、摩擦片;
121、活塞缸;
1211、进液开口;1212、传动开口;1213、排气口;
1214、第一外壳;1215、第二外壳;1216、容纳壳体;
122、活塞;
123、第一传动件;
124、第一凹槽;
125、第一延伸部;
126、第二延伸部;
127、丝杠部;128、传动齿部;
13、导向机构;
131、导向块;132、导向槽;
14、平面轴承;
15、卡簧;
16、轴向限位机构;
161、轴向弹性部;162、轴向配合部;
171、制动腔体;172、副空腔;
18、排气件;
181、排气螺栓;182、排气电磁阀;
19、限位结构;
191、容积限位部;192、容积配合部;
21、第二传动件;
211、第三传动件;212、滚珠件;213、第二凹槽;
214、大齿轮;215、小齿轮;216、花键孔;
22、驱动单元;
30、制动液装置;
31、制动液管路;32、第一电磁阀;33、第二电磁阀;34、油壶;
40、控制器;50、位移传感器;60、压力传感器;70、单向阀;
81、第一密封圈;82、第二密封圈;
4、车体;5、车轮。
具体实施方式
图1为本申请实施例提供的一种车辆1的结构示意图。如图1所示,本申请实施例提供的车辆1可以包括制动盘2、车轮5、车体4和制动系统3。制动盘2固定连接于车轮5。制动系统3固定连接于车体4,制动系统3用于夹紧制动盘2以实现行车制动驻车制动。其中,车体4指的是车辆1中用于连接车轮5、制动系统3等部件的主体结构。
其中,本申请实施例的车辆1可以是电动车/电动汽车(Electric Vehicle,EV),或者还可以为纯电动汽车(Pure Electric Vehicle/Battery Electric Vehicle,PEV/BEV)、混合动力汽车(Hybrid Electric Vehicle,HEV)、增程式电动汽车(Range Extended Electric Vehicle,REEV)、插电式混合动力汽车(Plug-in Hybrid Electric Vehicle,PHEV)、新能源汽车(New Energy Vehicle,NEV)等。
可以理解的是,制动系统3主要包括驻车制动模块和行车制动模块。行车制动模块采用液压油液(制动液)通过机械结构推动摩擦片11夹紧制动盘2移动,使得摩擦片11夹紧制动盘2,以实现行车制动。驻车制动模块采用电机通过机械结构推动摩擦片11移动,使得摩擦片11夹紧制动盘2,以实现驻车制动。
图2为相关技术中的一种制动装置的结构示意图。如图2所示,相关技术中的制动装置包括控制器11、活塞12、两个摩擦片13、钳体件14、丝杠15、螺母16、电机17和制动液装置18。钳体件14具有活塞腔体141、进液口142和连接口143,活塞腔体141分别与进液口142和连接口143连通。活塞12可活动地安装在活塞腔体141内。丝杠15穿设于连接口143,丝杠15位于活塞腔体141外的一端与电机17传动连接。螺母16套设在丝杠15位于活塞腔体141的一端上并与丝杠15螺纹配合。两个摩擦片13位于制动盘2的相对两侧,两个摩擦片13中的一个摩擦片13与活塞12固定连接、另一个摩擦片13与钳体件14固定连接。制动液装置18与进液口142相连。控制器11分别与电机17和制动液装置18电连接。当需要进行行车制动时,控制器11控制制动液装置18向活塞腔体141输送制动液,制动液推动活塞12沿制动盘2的轴向(如图2中X方向)向左移动的同时两个摩擦片13分别朝向制动盘2移动,直至两个摩擦片13抱紧制动盘2,实现行车制动。当需要进行驻车制动时,控制器11控制电机17工作,电机17驱动丝杠15转动,丝杠15驱动螺母16沿丝杠15的轴向向左移动,螺母16推动活塞12向左移动的同时两个摩擦片13分别朝向制动盘2移动,直至两个摩擦片13抱紧制动盘2,实现驻车制动。
在上述方案中,由于摩擦片与制动盘之间的间隙较大,这就导致驻车制动过程中摩擦片朝向制动盘所需要行进的距离较远,从而驻车制动行程较长,进而出现驻车制动时间较长的问题。另外,随着制动盘和/或摩擦片的磨损量增大,摩擦片与制动盘之间的间隙也会之间增大,从而会增加制动空行程,进而增加了制动时间、制动距离。 另外,摩擦片与制动盘的间隙增大,还会导致制动脚感发生变化。除此之外,摩擦片与制动盘分离依靠的是制动盘的摩擦力推动才能够完全分离,存在拖滞力矩,会增加摩擦片和/或制动盘的磨损、产生异响。
有鉴于此,本申请实施例提供一种控制方法、制动器、制动系统、存储介质以及产品。其中,在制动系统进行行车制动的过程中,可以调整摩擦片与制动盘之间的间隙大小,从而在行车制动结束以后,使得摩擦片与制动盘之间的间隙变小。因此,制动系统在进行驻车制动的过程中,由于摩擦片与制动盘之间的间隙变小,从而摩擦片需要行进的距离变短,进而可以缩短驻车制动行程,可以降低驻车制动时间,提升驻车效率。
下面结合附图,对本申请实施例提供的制动器以及包括制动器的制动系统的结构进行详细描述。
图3为本申请实施例提供的第一种制动系统的剖面图。如图3所示,本申请实施例提供的制动系统3可以包括制动液装置30、驱动单元22和制动器10。制动液装置30用于输出传递至制动器10上的液压驱动力,液压驱动力使得制动器10可以夹紧车辆1的制动盘2,实现行车制动。驱动单元22用于输出传递至制动器10上的驱动力,驱动力可以使制动器10夹紧车辆1的制动盘2,实现驻车制动。
如图3所示,制动器10可以包括摩擦片11、活塞122、活塞缸121、第一传动件123和第二传动件21。摩擦片11和活塞122沿第一方向并排设置,摩擦片11设置于活塞缸121的外部。活塞缸121用于与车辆1的车体连接,以固定制动器10。活塞122设置于活塞缸121的内部,活塞122的一端与第一传动件123相连,活塞122的另一端与摩擦片11固定连接。第二传动件21与第一传动件123传动连接,第二传动件21用于与驱动单元22相连,驱动单元22用于带动第二传动件21绕平行于第一方向(如图3中X向)的转动轴线旋转。第一传动件123用于将第二传动件21的旋转运动转换为活塞122沿第一方向的直线运动,当第一传动件123沿第一方向移动时,第一传动件123与第二传动件21始终传动连接、且与活塞122始终相连。可以理解的是,第一方向的平行于第一方向,活塞122的轴线平行于第一方向。
当第一传动件123用于将第二传动件21的旋转运动转换为活塞122沿第一方向的直线运动时,第一传动件123可以带动活塞122沿第一方向移动、或者第一传动件123可以相对于活塞122沿第一方向移动。另外,第一传动件123除了相对于活塞122沿第一方向运动外,第一传动件123也可以随着活塞122一起沿第一方向移动。
对于驱动第一传动件123的沿第一方向移动的动力源,这里不作限制。例如,当驱动单元22没有带动第二传动件21转动、且活塞122接收到制动液装置30输出的液压驱动力时,第一传动件123可以随着活塞122沿第一方向移动。
当制动器10进行驻车制动时,驱动单元22通过第二传动件21和第一传动件123带动活塞122沿第一方向朝向制动盘2移动,使得摩擦片11可以夹紧制动盘2,实现驻车制动。当制动器10进行行车制动时,活塞122用于接收制动液装置30输出的液压驱动力,液压驱动力推动活塞122沿第一方向朝向制动盘2移动,从而活塞122推动摩擦片11沿第一方向朝向制动盘2移动以使得摩擦片11夹紧制动盘2,实现行车制动。
在行车制动的过程中,如果驱动单元22没有输出驱动力,那么活塞122可以带动第一传动件123沿第一方向移动,换言之活塞122的另一端与第一传动件123之间的间距不会发生变化。另外,在驻车制动的过程中,活塞122沿第一方向朝向制动盘2移动,第一传动件123在第一方向上相对于制动盘2的位置几乎保持不变,可以认为第一传动件123在第一方向不发生轴向移动。
因此,在行车制动的过程中,第一传动件123可以通过第二传动件21接收驱动单元22输出的驱动力,驱动力会使得第一传动件123沿第一方向背向活塞122(在行车制动的过程中,液压驱动力使得活塞122的位置保持不动)移动,使得第一传动件123和活塞122之间的相对间距增加,从而在行车制动结束后,可以减小摩擦片11与制动盘2之间的间隙,进而可以缩短驻车制动时摩擦片11所需要行进的距离,可以缩短驻车制动时间,提升驻车效率。
在本申请实施例中,第一传动件123和活塞122的相对间距可以指的是第一传动件123的一端和活塞122的一端在第一方向上的间距。例如图3所示,第一传动件123和活塞122之间的相对间距为活塞122的右端面与第一传动件123的中部之间的间距(如图3中的B所示),或者,第一传动件123和活塞122之间的相对间距也可以为活塞122的右端面与第一传动件123的右端面之间的间距(如图3中的C所示)。
图4为摩擦片11和制动盘2之间的间隙与活塞122和第一传动件123之间的相对间距的示意图。如图4所示,摩擦片11与制动盘2之间的间隙E=F-D-C,或者,E=F-G-B-D。由于在驻车制动过程中,由于第一传动件123相对于制动盘2的位置几乎不发生变化,即图4中的F为定值。又因为D和G为定值,故而E的大小取决于B或C的大小,因此,摩擦片11与制动盘2之间的间隙与第一传动件123与活塞122之间的相对间距呈负相关。其中,活塞122与第一传动件123的相对间距越小,那么摩擦片11与制动盘2的间隙也越大。活塞122与第一传动件123的相对间距越大,那么摩擦片11越靠近制动盘2,摩擦片11与制动盘2的间隙也就越大。因此,可以通过调整活塞122与第一传动件123之间的相对间距来调整摩擦片11与制动盘2的间隙。
在行车制动过程中,由于活塞122接收到制动液装置30输出的液压驱动力,液压驱动力使得活塞122的位置保持不动,从而驱动单元22可以通过第二传动件21带动第一传动件123相对于活塞122向右移动,使得第一传动件123与活塞122之间的相对间距(如图3中的B或C)增加。可以理解的是,无论第一传动件123与活塞122之间的相对间距如何变化后,活塞122始终与第一传动件123相连。另外,驱动单元22除了可以带动第一传动件123相对于活塞122向右移动外,还可以带动第一传动件123相对于活塞122向左移动外,使得第一传动件123与活塞122之间的相对间距减小。
在驻车制动过程中,由于活塞122未接收到液压驱动力,从而驱动单元22可以通过第二传动件21和第一传动件123带动活塞122朝向制动盘2移动,使得摩擦片11可以夹紧制动盘2。其中,在活塞122向左移动的过程中,第一传动件123的位置保持不变,换言之,第一传动件123与制动盘2之间的间距保持不变,如此可以确保第一传动件123可以带动活塞122向左移动,使得摩擦片11可以夹紧制动盘2。
因此,本申请实施例通过在行车过程中控制第一传动件123和活塞122之间的相 对间距增加,可以缩短驻车制动时摩擦片11(或活塞122)所需要行进的距离,可以缩短驻车制动时间,提升驻车效率。可以理解的是,缩短驻车制动时摩擦片11(活塞122)所需要行进的距离也可以理解为将活塞122在驻车制动朝向制动盘2移动的部分行程提前挪到行车制动的过程中来,或者可以理解为行车制动时间和行车制动时间部分重叠。
在一些可能的实现方式中,如图3所示,活塞122背向摩擦片11的一端包括配合孔,第一传动件123包括丝杠部127,丝杠部127的轴线平行于第一方向,丝杠部127的一端设置于配合孔的内部并与活塞122相连,丝杠部127的另一端与第二传动件21传动连接。利用丝杠部127可以将转动转换为直线转动,从而丝杠部127可以带动活塞122沿第一方向移动、丝杠部127可以相对于活塞122沿第一方向移动,因而可以实现驻车制动、调整摩擦片11和制动盘2的间隙,进而可以避免由于更换摩擦片11、更换制动盘2、摩擦片11和制动盘2中的其中一个磨损等情形所导致摩擦片11与制动盘2之间的间距大而出现刹车时间增加的问题。
如图3所示,配合孔可以为盲孔,且配合孔的轴线平行于丝杠部127的轴线。然而,在一些实施例中,配合孔也可以沿第一方向贯穿活塞122,这里不作限制。
可以理解的是,活塞122与丝杠部127的配合形式类似于螺纹连接。其中,在活塞122没有接收到制动液装置30输出的液压驱动力且丝杠部127接收到驱动单元22输出的驱动力时,丝杠部127转动的同时可以驱动活塞122沿第一方向移动,使得摩擦片11贴近制动盘2。活塞122接收到液压驱动力且丝杠部127接收到驱动力时,丝杠部127转动的同时可以相对于活塞122沿第一方向移动。活塞122接收到液压驱动力且丝杠部127没接收到驱动力时,活塞122沿第一方向移动的同时可以带动丝杠部127一起移动,此时活塞122与丝杠部127之间的相对间距未发生变化。
下面阐述活塞122与丝杠部127的连接方式,确保丝杠部127转动时能够使得活塞122沿第一方向移动。
在一些可能的实现方式中,如图3所示,丝杠部127的一端穿设于活塞122的配合孔内并与活塞122螺纹连接,从而活塞122和丝杠部127可以类似于丝杠螺母机构,进而活塞122可以带动丝杠部127沿第一方向移动、丝杠部127可以相对于活塞122沿第一方向移动、丝杠部127转动时可以带动活塞122沿第一方向移动,以实现行车制动、驻车制动等功能。
可以理解的是,活塞122在功能上类似于螺母,从而活塞122与丝杠部127可以构成一个丝杠螺母机构。故而在活塞122接收到液压驱动力且丝杠部127没有接收到驱动力时,活塞122可以带动丝杠部127沿第一方向移动,实现行车制动的同时丝杠部127与活塞122始终连接。在活塞122接收到液压驱动力且丝杠部127接收到驱动力时,活塞122沿第一方向移动的同时丝杠部127可以沿与活塞122所运动方向的相反方向移动,使得丝杠部127与活塞122的相对间距增加,以减小驻车制动中摩擦片11所要行进的距离,实现缩短驻车时间。在活塞122没有接收到液压驱动力且丝杠部127接收到驱动力时,丝杠部127可以带动活塞122沿第一方向移动,使得摩擦片11可以夹紧制动盘2,实现驻车制动。
在本申请实施例中,对应丝杠部127的具体结构不作限制。例如一些实施例中, 丝杠部127包括沿第一方向依次连接的螺杆段、连接杆段和传动杆段。螺杆段设置于配合孔内并与活塞122螺纹连接,传动杆段用于与第二传动件21传动连接。
由于活塞122与丝杠部127螺纹连接,活塞122与丝杠部127发生相对运动的过程中两者相互滑动,因此丝杠部127容易磨损、丝杠部127和活塞122的定位精度变低。因此,在一些可能的实现方式中,丝杠部127的一端穿设于活塞122的配合孔内,丝杠部127的一端用于与活塞122共同限定出滚珠丝杠机构,可以减小活塞122和丝杠部127之间的摩擦力,有助于提高活塞122和/或丝杠部127移动的精度。
对于活塞122的具体结构,这里不作限制。其中,可以理解的是,活塞122可以包括螺母和钢球。螺母套设在丝杠部127上并通过钢球与丝杠部127螺旋传动配合。通过钢球可以实现螺母与丝杠部127滚动摩擦,可以改善丝杠部127易磨损、定位精度低的问题。
可以理解的是,丝杠螺母机构和滚珠丝杠机构都是螺旋传动机构,都可以将丝杠部127的旋转运动转换为活塞122的直线运动,从而活塞122带动摩擦片11沿第一方向移动。
在本申请实施例中,第一传动件123的运动形态包括:第一种是第一传动件123在活塞122或第二传动件21的带动下沿第一方向移动,第二种是第一传动件123在第二传动件21的作用下发生旋转运动。因此,在驱动单元22没有输出驱动力时第一传动件123与第二传动件21的连接方式需要保证第一传动件123可以跟随活塞122平动,在驱动单元22输出驱动力时第一传动件123与第二传动件21的连接方式需要保证第一传动件123可以转动。下面阐述第二传动件21如何与第一传动件123传动连接。
图5为本申请实施例提供的第一传动件123与第二传动件21传动连接的一种结构的剖面图。在一些可能的实现方式中,第二传动件21可以包括贯穿第二传动件21的花键孔216,花键孔216的轴线平行于第一方向。第一传动件123靠近第二传动件21的一端设置于花键孔216内并与第二传动件21花键连接。如此设置,第一传动件123可以在第二传动件21的内部沿第一方向滑动,从而第一传动件123可以随活塞122一起移动、或者第一传动件123可以相对于活塞122在第二传动件21的内部作轴向滑动。另外,在第一传动件123的周向上,第一传动件123与第二传动件21相互配合,使得第二传动件21能够带动第一传动件123转动,确保第一传动件123可以自转、并可以相对于活塞122作轴向移动。
可以理解的是,如图5所示,第二传动件21的结构可以为环形结构,从而第二传动件21可以套设在丝杠部127的另一端的外壁上并与第一传动件123花键连接,从而在丝杠部127的周向上第二传动件21与第一传动件123可以抵接,进而第二传动件21可以带动第一传动件123转动。
对于第一传动件123与第二传动件21花键连接的具体结构,这里不作限制。示例性地,在一些实施例中,第一传动件123的一端可以包括丝杠部127和多个传动齿部128,每个传动齿部128延伸的方向平行于丝杠部127的轴向,多个传动齿部128沿丝杠部127的周向间隔设置并固定连接于丝杠部127的外壁。每个传动齿部128的纵截面可以包括但不限于为矩形(如图6所示)、三角形或半圆形等。每个传动齿部128的纵截面垂直于丝杠部127的轴向。
图6为本申请实施例提供的第一传动件123与第二传动件21传动连接的另一种结构的剖面图。在一些可能的实现方式中,如图6所示,第一传动件123靠近第二传动件21的一端的外壁可以包括多个第一凹槽124,每个第一凹槽124沿第一传动件123的轴向延伸,多个第一凹槽124沿第一传动件123的周向(如图6中M向)间隔设置。第二传动件21可以包括多个滚珠件212和第三传动件211,第三传动件211套设于第一传动件123的外壁并用于与驱动单元22相连,第三传动件211朝向第一传动件123的内表面包括多个第二凹槽213,每个第二凹槽213沿第二传动件21的轴向延伸,多个第二凹槽213沿第二传动件21的周向(如图6中M向)间隔设置,多个第二凹槽213分别与多个第一凹槽124和多个滚珠件212一一对应,每个滚珠件212的相对两端分别设置于相对应的第一凹槽124的内部和第二凹槽213的内部。
第一传动件123可以在第二传动件21的内部沿第一方向滑动,从而第一传动件123可以随活塞122一起移动、或者第一传动件123可以相对于活塞122在第二传动件21的内部作轴向滑动。另外,在第一传动件123的周向上,第一传动件123与第二传动件21相互配合,使得第二传动件21能够带动第一传动件123转动,确保第一传动件123可以自转、并可以相对于活塞122作轴向移动。另外,采用如此结构的第二传动件21,可以减小第一传动件123和第二传动件21之间的摩擦力,进而可以减小第一传动件123在第二传动件21内部滑动的阻力。
可以理解的是,如图3所示,第一凹槽124可以设置于第一传动件123的丝杠部127的外壁,第一凹槽124延伸的方向平行于丝杠部127的轴向。
可以理解的是,第一凹槽124和第二凹槽213均可以为弧形槽,第一凹槽124和第二凹槽213的纵截面均可以为一个弧形段。第一凹槽124和第二凹槽213的纵截面垂直于第一传动件123的轴向。
可以理解的是,每个滚珠件212可以包括至少一个滚珠,每个滚珠的相对两端分别插设于该滚珠件212相对应的第一凹槽124和第二凹槽213内。另外,每个滚珠件212的滚珠数量可以相同或不相同,这里不作限制。
对于第三传动件211的具体结构,这里不作限制。其中,可以根据第二传动件21与驱动单元22的连接方式而定,例如在一些实施例中,第二传动件21可以包括主动齿轮和从动齿轮件。驱动单元22可以包括电机,主动齿轮套设在电机的输出轴上并与电机轴固定连接。从动齿轮件可以包括第三传动件211和多个滚珠件212。第三传动件211可以为套设于第一传动件123的外壁的齿轮并通过滚珠件212与第一传动件123配合,且第三传动件211与主动齿轮啮合。因此,第三传动件211可以类似于一个齿轮。
在上述内容中,阐述了第二传动件21与第一传动件123传动连接的两种结构,然而这两种传动连接的结构对于第二传动件21的结构并不构成限制,只要第二传动件21的作用是传动连接第一传动件123和驱动单元22便可,因此,在本申请实施例中,对于第二传动件21的具体结构不作限制。
在一些实施例中,第二传动件21在功能上可以是类似于一个减速器,减速器的具体减速比和减速的形式,这里不作限制。例如,第二传动件21可以是多级定轴减速器、行星齿轮减速器、谐波齿轮减速器等。示例性地,如图3所示,第二传动件21可以包 括相互啮合的大齿轮214和小齿轮215,实现降速增矩。小齿轮215套装在电机的电机轴上。大齿轮214套装在第一传动件123的丝杠部127的外壁上并与第一传动件123的丝杠部127传动连接。其中,第一传动件123可以在大齿轮214内滑动,从而第一传动件123可以相对于大齿轮214沿第一方向移动。另外,大齿轮214也可以在周向上与第一传动件123抵接,从而大齿轮214可以带动第一传动件123转动。示例性地,大齿轮214可以通过花键连接的方式与第一传动件123传动连接。或者大齿轮214可以包括上述的滚珠件212和第三传动件211。
图7为图7中A处的局部放大图。在一些可能的实现方式中,如图7所示,制动器10还可以包括平面轴承14,平面轴承14设置于活塞缸121的内部并与活塞缸121固定连接,平面轴承14套设于第一传动件123的外壁并与第一传动件123活动连接。第一传动件123包括沿第一传动件123的径向延伸的第一延伸部125,沿第一传动件123的轴向第一延伸部125设置于平面轴承14和活塞122之间,第一延伸部125用于与平面轴承14朝向活塞122的一端的端面抵接。因此,通过平面轴承14,可以保证第一传动件123相对于活塞缸121平顺转动。另外,在第一传动件123带动活塞122沿第一方向移动的过程中,活塞缸121通过平面轴承14沿第一方向轴向支撑第一传动件123,从而第一传动件123可以承受足够的轴向载荷,使得活塞122可以朝向制动盘2移动。
可以理解的是,通过平面轴承14,使得第一传动件123在轴向上可以与活塞缸121抵接,从而第一传动件123与活塞缸121的相对位置保持不变。利用活塞缸121作为支座,第一传动件123可以平顺转动以带动活塞122移动,实现驻车制动。
对于第一延伸部125的具体结构,这里不作限制。例如图7所示,第一延伸部125可以中空结构的为环形体,环形体用于与平面轴承14在第一方向上朝向制动盘2的一端的端面抵接。或者,在一些实施例中,第一延伸部125可以包括两个延伸块,两个延伸块绕第一传动件123的周向间隔设置,每个延伸块用于与平面轴承14接触。
对于具有第一延伸部125的第一传动件123的具体结构,这里不作限制。例如一些实施例中,第一传动件123可以包括第一延伸部125和丝杠部127。丝杠部127的轴向平行于第一方向,丝杠部127的相对两端分别与活塞122和第二传动件21传动连接。第一延伸部125设置于丝杠部127的外壁并与丝杠部127固定连接。另外,丝杠部127和第一延伸部125可以为一体结构或分体结构,这里不作限制。
对于将平面轴承14与活塞缸121固定连接的方式,这里不做限制。例如,在一些实施例中,制动器10还可以包括卡簧15,平面轴承14通过卡簧15与活塞缸121固定连接。在第一传动件123沿第一方向移动的过程中,由于第一延伸部125可能与平面轴承14分开,因而卡簧15可以在第一方向上对平面轴承14进行约束,避免平面轴承14相对于活塞缸121的位置发生变化。
在一些可能的实现方式中,如图7所示,制动器10还可以包括轴向限位机构16,轴向限位机构16设置于活塞缸121的内部。第一传动件123沿第一方向移动时,轴向限位机构16用于避免第一传动件123沿第一方向发生窜动。
对于轴向限位机构16的具体结构,这里不作具体限制。例如在一些可能的实现方式中,轴向限位机构16可以包括轴向配合部162和轴向弹性部161,轴向配合部162 固定连接于活塞缸121的内壁,轴向弹性部161的轴线平行于第一传动件123的轴线,轴向弹性部161的相对两端分别与轴向配合部162和第一传动件123的外壁相连。因此,通过轴向弹性部161的弹力,可以避免第一传动件123沿第一方向发生窜动。
在申请实施例中,对于轴向配合部162的结构不作限制。例如一些实施例中,轴向配合部162可以为沿垂直于第一方向的第二方向延伸的轴向配合块,轴向配合块的两端分别与活塞缸121的内壁和轴向弹性部161的一端相连。
在申请实施例中,对于轴向弹性部161的结构不作限制。例如一些实施例中,轴向弹性部161可以为弹簧,弹簧的两端分别与轴向配合部162和第一传动件123的外壁相连,弹簧的轴向平行于第一传动件123的轴向。或者一些实施例中,轴向弹性部161可以为具有弹性的弹性块,弹性块的两端分别与轴向配合部162和第一传动件123的外壁相连,弹性块的延伸方向平行于第一传动件123的轴向。
在本申请实施例中,轴向弹性部161和轴向配合部162的数量均可以为至少一个,且至少一个轴向弹性部161和至少一个轴向配合部162一一对应。其中,当轴向配合部162和轴向弹性部161的数量均可以为多个时,多个轴向配合部162和多个轴向弹性部161一一对应,多个轴向配合部162沿第一传动件123的周向间隔设置,多个轴向弹性部161沿第一传动件123的周向间隔设置。
在一些实施例中,如图7所示,第一传动件123可以包括沿第一传动件123的径向延伸的第二延伸部126,第二延伸部126沿第一方向用于设置于活塞122和第一传动件123的第一延伸部125之间,轴向配合部162位于活塞122和第二延伸部126之间,轴向弹性部161的相对两端分别与第二延伸部126和轴向配合部162相连。其中宁,当轴向弹性部161的数量为多个时,每个轴向弹性部161的相对两端分别与第二延伸部126和相对应的轴向配合部162相连。
对于第二延伸部126的结构,这里不作限制。例如一些实施例中,第二延伸部126可以是中空的环状部,环状部的轴向平行于第一方向。或者一些实施例中,第二延伸部126可以包括多个绕第一传动件123的周向间隔设置的第二延伸块,每个第二延伸块延伸的方向垂直于第一方向。
如图7所示,第二延伸部126与第一延伸部125在第一方向上没有间隙,即第二延伸部126与第一延伸部125相连。然而在一些实施例中,第二延伸部126在第一方向上与第一延伸部125存在间隙。另外,第二延伸部126的尺寸可以根据轴向弹性部161的位置而定,这里不作限制。
对于具有第一延伸部125和第二延伸部126的第一传动件123的具体结构,这里不作限制。例如一些实施例中,第一传动件123可以包括第一延伸部125、第二延伸部126和丝杠部127。丝杠部127的轴向平行于第一方向,丝杠部127的相对两端分别与活塞122和第二传动件21传动连接。第一延伸部125和第二延伸部126分别设置于丝杠部127的外壁并与丝杠部127固定连接。另外,丝杠部127、第一延伸部125和第二延伸部126可以为一体结构或分体结构,这里不作限制。
需要说明的是,除了通过第二延伸部126与轴向弹性部161相连外,在一些可能的实现方式中,也可以利用第一延伸部125替代第二延伸部126的作用,此时轴向配合部162沿第一方向位于第一延伸部125和活塞122之间,轴向弹性部161的两端分 别与第一延伸部125和轴向配合部162相连。
在本申请实施例中,为了确保通过第一传动件123的转动带动活塞122沿第一方向平动,需要避免活塞122平行于第一方向的转动轴线转动,即活塞122沿第一方向平动。因此,在一些可能的实现方式中,如图3所示,制动器10还可以包括导向机构13,导向机构13的一部分设置于活塞缸121,导向机构13的另一部分设置于第一传动件123,导向机构13用于使活塞122沿第一方向平动。因此在驻车制动的过程中,第一传动件123可以带动活塞122沿第一方向平动,实现行车制动、调节摩擦片11与制动之间的间距、摩擦片11快速复位、零滚阻行车、行车异物排出等功能。
在一些实施例中,导向机构13可以设置于活塞缸121的内部,导向机构13的一部分设置于活塞缸121的内壁,导向机构13的另一部分设置于第一传动件123的外壁。通过将导向机构13设置于活塞缸121的内部,有助于提高制动器10的结构紧凑性,进而可以减小制动器10的体积。
对于导向机构13的具体结构,这里不作限制。例如,在一些可能的实现方式中,如图3所示,导向机构13可以包括两组导向组,两组导向组沿第一传动件123的周向间隔设置。每组导向组可以包括一个导向块131和一个导向槽132。每组导向组的导向块131和导向槽132中的其中一个设置在活塞缸121的内壁上、另一个设置在活塞122的外壁上。将导向块131滑设于导向槽132内,活塞122不会绕第一传动件123的轴线发生转动,从而第一传动件123转动时可以带动活塞122沿第一方向平动。
可以理解的是,导向组的数量除了为两个外,也可以为一、三、四、五等数量。
对于导向块131的具体形状,这里不作限制。例如,在一些实施例中,导向块131的纵截面可以为等腰梯形。
可以理解的是,导向槽132的形状可以与导向块131插入导向槽132内的部分适配,这里不作具体限制。
如图3所示,导向块131固定连接在活塞缸121的内壁上,导向槽132设置在活塞122的外壁上。然而,在一些实施例中,也可以导向块131固定连接在活塞122的外壁上,导向槽132设置在活塞缸121的内壁上。
在一些可能的实现方式中,活塞缸121可以为中空结构,活塞缸121的轴线平行于摩擦片11的轴线。活塞122的外壁与活塞缸121的内壁共同限定出容积可变的制动腔体171,活塞缸121包括与制动腔体171连通的进液开口1211,进液开口1211用于供制动液进出制动腔体171。摩擦片11和第二传动件21设置于活塞缸121的外部,第一传动件123的一部分设置于活塞缸121的内部,第一传动件123的另一部分设置于活塞缸121的外部并与第二传动件21传动连接。采用如此结构的活塞缸121,可以限定出容积可变的制动腔体171,进而可以通过控制制动液的体积来实现行车制动。
可以理解的是,活塞缸121包括沿第一方向相对的两个开口,摩擦片11设置于活塞缸121的其中一个开口处并通过该开口与活塞122连接,第一传动件123通过活塞缸121的另一个开口与第二传动件21传动连接。
可以理解的是,第一传动件123悬空于在活塞缸121内并与活塞缸121的内壁活动连接,以保证第一传动件123可以转动或沿第一方向移动。
可以理解的是,如图3所示,当活塞122向左移动至摩擦片11夹紧制动盘2时, 制动腔体171的容积可以达到最大。当活塞122向右移动至极限位置时,制动腔体171的容积可以达到最小。
如图3所示,制动腔体171可以为环绕活塞122的轴线的环形腔体,有助于使活塞122受力平衡。当然,制动腔体171不限于为环形腔体。
如图3所示,为了限定出制动腔体171以及确保制动液可以推动活塞122移动,活塞122的形状可以为阶梯轴。例如在一些实施例中,活塞122可以包括同轴的第一轴段和第二轴段。第一轴段的外径大于第二轴段的外径,第一轴段朝向制动盘2的一端与摩擦片11固定连接。第二轴段背向第一轴段的一端与第一传动件123的一端传动连接。
对于活塞缸121的具体结构,这里不作限制。例如,在一些实施例中,活塞缸121可以包括中空结构的第一外壳1214和第二外壳1215。第一外壳1214和第二外壳1215同轴设置,第一外壳1214的第一端和第二外壳1215的第一端固定连接。第一外壳1214位于摩擦片11和第二外壳1215之间,第一外壳1214和第二外壳1215分别套设在活塞122上并分别与活塞122的相对两端密封连接。
如图3所示,活塞122与背向摩擦片11的一端与活塞缸121的内壁共同限定出一个具有开口的副空腔172,换言之,活塞122与中空结构的活塞缸121的内壁共同限定出相互隔开的制动腔体171和副空腔172。副空腔172可以用于容纳上述内容中的轴向限位机构16、平面轴承14、卡簧15等,从而可以提高制动器10的紧凑性。
在一些可能的实现方式中,如图3所示,制动器10还可以包括第一密封圈81和第二密封圈82,第一密封圈81和第二密封圈82分别套设在活塞122的相对两端上并与活塞缸121的内壁抵接。通过第一密封圈81和第二密封圈82,可以在活塞122能够相对于活塞缸121移动的前提下保证制动腔体171的密封性,以免制动腔体171内的制动液泄露。
在一些可能的实现方式中,参见图7所示,活塞122和活塞缸121之间可以设置有限位结构19,限位结构19用于在活塞122沿第一方向移动时定位活塞122和活塞缸121的相对位置,使得制动腔体171的容积最小,有助于实现制动液更换、排气等功能。
本申请实施例中,对于限位结构19的具体结构不作限制。例如一些实施例中,限位结构19可以包括容积限位部191和与容积限位部191配合的容积配合部192。容积限位部191设置于活塞122的外壁,容积配合部192设置于活塞缸121的内壁。容积配合部192与容积限位部191配合,可以在活塞122背向制动盘2移动时,定位活塞122和活塞缸121的相对位置,使得活塞122处于极限位置,从而制动腔体171的容积最小,有助于实现制动液更换、排气等功能。
对于容积限位部191的具体结构,这里不作限制。其中,容积限位部191的结构可以根据容积配合部192的结构而定。例如在一些实施例中,容积配合部192为设置在活塞缸121的内壁上的台阶,容积限位部191可以为活塞122背向摩擦片11的一端。活塞122背向摩擦片11的一端的端面与台阶抵触时,活塞122无法继续向右移动,活塞122与活塞缸121的相对位置保持不变,制动腔体171的容积达到最小。
在一些可能的实现方式中,如图3所示,活塞缸121还包括与制动腔体171连通 的排气口1213,排气口1213用于导出制动腔体171内的气体,以保证制动腔体171内的压力稳定在合理范围内。制动器10还包括排气件18,排气件18用于控制排气口1213的开闭,从而在无需排气时保证制动腔体171的密封性。
在一些实施例中,排气件18可以为排气螺栓181,排气螺栓181插设于排气口1213内并与活塞缸121螺纹连接以将排气口1213密封。采用排气螺栓181密封排气口1213,在控制排气口1213开闭的前提下可以降低排气件18的成本,从而可以降低制动器10的成本。
由于采用排气螺栓181作为排气件18时需要人手动打开排气口1213,存在操作不便的问题。图8为本申请实施例提供的第二种制动系统3的剖面图。因此,在一些实施例中,可以将排气螺栓181替换为排气电磁阀182(如图8所示),排气电磁阀182与排气口1213相连并用于与控制器40电连接,控制器40用于控制排气电磁阀182的通断以控制排气口1213的开闭,从而可以实现自动排气,无需人工操作。
在一些实施例中,如图8所示,制动器10还可以包括单向阀70,排气电磁阀182通过单向阀70与排气口1213相连,单向阀70用于使制动腔体171内的制动液从排气口1213单向流出。
在一些可能的实现方式中,参见图3所示,制动器10还可以包括压力传感器60,压力传感器60用于根据制动液的压力输出压力信号。根据压力信号,可以实现液压油更换与排气、冗余行程制动以及故障检测等功能。
对于压力传感器60的具体布置位置,这里不作限制。例如在一些实施例中,可以将压力传感器60布置在连接制动液装置30和进液开口1211的管路上。或者,也可以将压力传感器60布置在制动腔体171内。
在一些可能的实现方式中,参见图3所示,制动器10还可以包括位移传感器50,位移传感器50可以固定连接于活塞缸121,位移传感器50用于根据第一传动件123沿第一方向的移动输出位移信号。根据位移信号,可以实现随行制动、预驻车、摩擦片11与制动盘2的间隙调整等功能。
通过位移传感器50,可以检测第一传动件123在第一方向上的移动距离,根据移动距离可以得到第一传动件123和活塞122在第一方向上的相对间距,根据第一传动件123和活塞122的相对间距可以得到制动盘2和摩擦片11之间的间隙,有助于精确控制摩擦片11和制动盘2之间的间隙。
在本申请实施例中,对于位移传感器50的具体布置位置这里不作限制。在一些实施例中,由于制动盘2的位置始终保持不变,且活塞缸121与车体固定连接,因而活塞缸121的位置始终保持不变。因此,可以通过测量第一传动件123与活塞缸121上的一端在第一方向上的间距变化,就可以得到第一传动件123的移动距离,进而可以知道第一传动件123的位置。例如图3所示,可以将位移传感器50布置在活塞缸121的内部、并位于活塞缸121的内壁的布置区域内,布置区域在第一方向与活塞122背向摩擦片11的一端的端面相对。通过位移传感器50检测布置区域与活塞122背向摩擦片11的一端的端面在第一方向上的间距变化,可以计算得到活塞122和第一传动件123之间的相对间距,进而可以得到第一传动件123在第一方向上的移动距离。
在一些可能的实现方式中,如图3所示,摩擦片11的数量可以为两个,两个摩擦 片11设置在制动盘2的相对两侧,两个摩擦片11中的一个摩擦片11与活塞122固定连接,两个摩擦片11相连。活塞122带动一个摩擦片11沿第一方向移动时,该摩擦片11也会带动另一个摩擦片11沿第一方向移动,从而两个摩擦片11可以分别沿第一方向移动,进而两个摩擦片11可以夹紧制动盘2。
然而,摩擦片11的数量除了为两个以外,在一些实施例中,摩擦片11的数量也可以为一个,这里不作限制。
活塞122与摩擦片11的连接方式可以是螺纹连接、卡接等方式,这里不作限制。示例性地,如图3所示,摩擦片11通过螺钉与活塞122固定连接。
在本申请实施例中,摩擦片11的形状可以为圆形,摩擦片11的轴线平行于第一方向。当然,摩擦片11的形状也可以为其它形状,例如矩形或其它不规则的形状。可以理解的是,第一方向垂直于摩擦片11朝向活塞122的表面。
在一些可能的实现方式中,如图3所示,如图3所示,制动器10还可以包括容纳壳体1216,容纳壳体1216与活塞缸121背向摩擦片11的一端固定连接,容纳壳体1216包括传动开口1212,传动开口1212用于连通活塞缸121的内部和容纳壳体1216的内部。容纳壳体1216可以用于容纳第二传动件21和驱动单元22,第二传动件21通过传动开口1212与第一传动件123传动连接。
在一些可能的实现方式中,驱动单元22可以包括电机,电机的电机轴与制动器10的第二传动件21相连。电机可以包括角度传感器,角度传感器用于根据电机的电机轴的转动角度和转向输出角度信号。
根据角度信号和第一传动件123的移动距离可以得到活塞122的位置,从而可以得到摩擦片11的位置,进而可以知道摩擦片11与制动盘2之间的间隙的大小,有助于提高调整摩擦片11和制动盘2之间的间隙的精度。另外,还可以实现第一传动件123位置的精确检测。另外,还可以得到活塞122的位置。
在一些可能的实现方式中,如图3所示,制动系统3还可以包括控制器40。控制器40分别与制动液装置30、驱动单元22和制动器10电连接。通过控制器40控制制动液装置30和驱动单元22,可以使制动器10可以实现不同的功能,满足不同的需求。例如,控制器40控制制动液装置30来控制制动液进出制动腔体171,使得制动器10可以具备行车制动功能。控制器40控制驱动单元22的动作来使得第一传动件123可以转动,使得制动器10可以具备摩擦片11与制动盘2的间隙调整功能、驻车功能等。当然,制动器10具备的功能不仅限于上述的几种功能。
需要说明的是,控制器40除了是制动系统3的控制器40外,在一些实施例中,控制器40也可以是车辆1的控制器40。或者,控制器40也是专门设置的控制器40。
本申请实施例中,制动液装置30的作用是向制动器10的制动腔体171内注入制动液,因此,这里不对制动液装置30的具体结构做限制。例如,在一些可能的实现方式中,制动液装置30可以包括制动液管路31、第一电磁阀32、第二电磁阀33和油壶34。制动液管路31的第一接口用于与制动器10的进液开口1211相连通,制动液管路31的第二接口通过第一电磁阀32与油壶34相连通,制动液管路31的第三接口与第二电磁阀33的第一接口相连通。第二电磁阀33的第二接口用于供制动液进出制动液管路31。通过控制第一电磁阀32的通断,可以实现制动腔体171与油壶34的连通, 从而在活塞122进行大行程移动而使得制动腔体171的容积变大时,可以使制动腔体171内始终有满腔的制动液。另外,通过第二电磁阀33可以使制动主缸(与第二电磁阀33的第二接口相连通)中的制动液进入或流出制动液管路31,进而流入制动腔体171内,实现行车制动。
在上述内容中,由于制动器10可以包括压力传感器60,用于检测制动液的压力。其中,压力传感器60可以布置在制动液管路31上,通过检测制动液管路31内的制动液的压力可以得到作用到活塞122上的液压驱动力的大小。
需要说明的是,在本申请实施例中,制动系统3包括制动液装置30。然而,在一些实施例中,制动系统3也可以不包括制动液装置30,此时制动液装置30可以是车辆1的制动液装置30,相对应地,制动系统3可以包括驱动单元22和制动器10。
本申请实施例中,由于制动系统3具有排气件18、压力传感器60、具有角度传感器的电机和位移传感器50等零件,因此,制动系统3还可以具有摩擦片11与制动盘2的间隙自适应调整功能、液压油更换与排气、随行制动等功能。下面结合具体场景,介绍本申请实施例提供的制动系统3的工作原理。
随行制动功能:
参见图3所示,在常规行车制动工况下,制动液通过制动液管路31注入到制动腔体171中,制动液推动活塞122左移的同时,活塞122带动第一传动件123共同左移,即第一传动件123跟随活塞122仅进行平动,实现无差异行车制动。其中,在活塞122向左平移的过程中,第一传动件123向左平移的距离控制在一定行程之内,即第一传动件123与制动盘2之间的间距在一定范围内,可以避免轴向弹性部161被压缩到极限而无法正常使用。
其中,通过位移传感器50输出的位移信号可以实时监控第一传动件123的平动距离。当第一传动件123的平动距离超过极限值后,可以通过驱动单元22通过第二传动件21带动第一传动件123转动,使得第一传动件123和活塞122的相对间距增加,以避免轴向弹性部161被压缩到极限。
随行预驻车功能:
参见图3所示,在常规行车制动工况下,控制第一电磁阀32关闭、第二电磁阀33导通,制动液通过制动液管路31注入到制动腔体171中、并推动活塞122左移。活塞122左移的同时会带动第一传动件123共同左移。在第一传动件123向左移动的距离超过预设的距离之后,控制驱动单元22通过第二传动件21带动第一传动件123转动,使得第一传动件123与活塞122之间的相对间距增加(例如图3中的B),从而在进行驻车制动的过程中可以减小摩擦片11需要行进的距离,进而可以缩短驻车制动时间,提升驻车效率。其中,第一传动件123向左移动的距离可以根据位移传感器50输出的位移信号计算得到。
驻车功能:
参见图3所示,在行车制动结束后需要进行驻车时,控制驱动单元22通过第二传动件21和第一传动件123带动活塞122向左移动,活塞122推动摩擦片11向左移动,直至摩擦片11夹紧制动盘2,实现驻车制动。需要解除驻车制动时,驱动单元22通过第一传动件123和第二传动件21带动活塞122向右移动,便可以使摩擦片11不再 夹紧制动盘2,解除驻车制动。
制动卡钳距离自适应调整功能:
图9为摩擦片11出现磨损时的示意图。在长时间行车制动之后,如图9所示,摩擦片11的表面发生磨损(如图9中矩形的虚线区域),导致摩擦片11与制动盘2的间隙增加,增大了制动空行程,增长了制动时间,增长了制动距离,同时制动脚感也会发生改变。另外,除了由于摩擦片11磨损导致摩擦片11与制动盘2的间隙增加外,也可能是制动盘2的表面磨损,或者,摩擦片11和制动盘2都发生磨损。
在驻车制动中,控制器40控制第一电磁阀32导通、并控制第二电磁阀33关闭,使得油壶34与制动腔体171导通并切断制动主缸与制动腔体171中的制动液流通。同时控制器40根据位移传感器50输出的位移信号控制驱动单元22通过第二传动件21带动第一传动件123转动,使得活塞122向右移动,使得活塞122与第一传动件123之间的相对间距增加,实现调整摩擦片11与制动盘2之间的间隙减小的目的。调节完成之后关闭第一电磁阀32,实现在任意非制动状态下,摩擦片11与制动盘2之间的间隙始终相同,实现基础制动空行程的一致性,缩短由于磨损导致的刹车时间增长和刹车距离增大的问题,保证驾驶体验不改变。其中,根据位移信号可以精确控制摩擦片11的移动距离,保证摩擦片11和制动盘2之间的间隙。
低拖滞快速复位功能:
在行车制动结束之后,制动液从高压变为低压,在摩擦片11和制动盘2之间的摩擦力作用下,制动盘2与摩擦片11会进行自动的分离。但由于内摩擦作用,摩擦片11与制动盘2分离无法实现快速分离、恒定距离,出现拖滞、磨损和异响。
参见图3所示,控制器40在接收到制动踏板信号后控制第一电磁阀32关闭、并控制第二电磁阀33导通,其中,制动踏板信号指的是车辆1的制动踏板制动行车制动解除的信号。随后驱动单元22通过第一传动件123和第二传动件21带动活塞122向右移动,使得活塞122与第一传动件123之间的相对间距减小,实现拖动活塞122快速退回。活塞122快速退回的过程中会带动制动腔体171内的制动液快速会到制动主缸(第二电磁阀33的第二接口与制动主缸相连)中,会加速制动盘2与摩擦片11分离,实现摩擦片11和制动盘2快速分离。另外,根据位移传感器50输出的位移信号,可以实现摩擦片11与制动盘2的间隙的精确控制,降低基础制动拖滞力矩,提升整车能耗。
零滚阻行车功能:
在行车过程中,可以根据位移传感器50输出的位移信号时刻监控活塞122和第一传动件123的移动距离。然而,在特定工况下,例如制动盘2存在偏磨情况下或者异物夹在制动盘2与摩擦片11之间的情况下,根据位移信号计算出的摩擦片11与制动盘2之间的间隙应该满足不接触条件,但摩擦片11与制动盘2仍然存在部分接触。控制器40在接收到位移传感器50发出的位移信号、且没有接收到车辆1的制动踏板输出的制动信号的情况下,控制器40控制第二电磁阀33关闭、并控制第一电磁阀32导通、控制驱动单元22通过第一传动件123和第二传动件21带动活塞122向右平移,使得第一传动件123和活塞122之间的相对间距减小,从而摩擦片11与制动盘2之间的间隙变大。在完成调节之后,控制第一电磁阀32关闭、并控制第二电磁阀33导通, 从而完成制动腔体171内部的液压体积调节,实现零滚阻行车,降低运行噪音,降低制动能耗,改善制动效能。
行车异物排出功能:
图10为行车过程中异物进入摩擦片11和制动盘2之间的示意图。如图10所示,在车辆1的行车过程中,一旦异物进入制动盘2与摩擦片11之间,即会增大制动盘2的摩擦力矩、会造成异响、损坏制动盘2和摩擦片11表面,从而影响摩擦片11和制动盘2的寿命。在这种工况下,摩擦片11与制动盘2之间的间隙大于设定的自适应的距离后,控制器40根据位移传感器50输出的位移信号控制驱动单元22工作,驱动单元22通过第一传动件123和第二传动件21带动活塞122向右移动,使得第一传动件123和活塞122之间的相对间距减小,从而制动盘2与摩擦片11之间的间隙增大,进而可以排出异物。在下一次行车制动过程中,根据位移传感器50输出的位移信号检测活塞122向左移动的距离,从而在行车制动解除之后,调整活塞122和第一传动件123之间的相对间距,使得摩擦片11与制动盘2的间隙处于预设的间隙值,从而实现了异物排出并恢复正常运行状态的整个过程,改善了运行过程中的噪音,降低了能量损耗,改善制动效果,避免零部件的损伤,延长零部件使用寿命。
驻车摩擦片11更换与复位功能:
在驻车过程中,由于摩擦片11的长时间使用,已经无法满足日常行车制动的基本需求,需要进行更换。参见图3所示,控制器40控制驱动单元22通过第一传动件123和第二传动件21带动活塞122向右移动,增大摩擦片11与制动盘2的间隙,以方便摩擦片11的更换。在更换完成之后,控制器40控制驱动单元22输出传递至制动器10的驱动力,制动器10进行驻车制动。其中,控制器40根据位移传感器50输出的位移信号重新计算摩擦片11与制动盘2的合理间隙,实现自动间隙调整和标定,从而即便更换的摩擦片11厚度不一致,也可以保证更换前后制动盘2与摩擦片11的间隙的一致,保证驾驶体验不改变。
冗余行车制动以及故障检测功能:
在发生行车制动失效的情况下,即车辆1的制动踏板发出建压信号后,压力传感器60检测到制动液的压力未发生变化时,制动系统3便会自动进行诊断与检测。
制动系统3进行诊断与检测的过程为:控制器40控制驱动单元22通过第一传动件123和第二传动件21带动活塞122向右移动,缩小制动腔体171的容积。控制器40根据压力传感器60输出的压力信号、位移传感器50输出的位移信号、角度传感器输出的角度信号等参数判断制动液装置30的管路是否发生泄漏,并反馈相关故障信息给驾驶员。其中,当压力信号和位移信号相匹配时,则认为制动液装置30的管路正常无损坏,控制器40控制第一电磁阀32导通,保证油壶34与制动腔体171连通,同时进入冗余行车制动功能。其中,压力信号和位移信号相匹配指的是制动液的压力变化与活塞122的移动距离对应的上。当压力信号和位移信号未相匹配时,则认为制动液装置30的管路发生故障,并给出管路泄露指示,同时进入冗余行车制动功能。
制动系统3执行冗余制动功能时:控制器40根据位移传感器50输出的位移信号、压力传感器60输出的压力信号、角度传感器输出的角度信号、车辆1的轮速传感器输出的轮速信号等信号控制驱动单元22带动第一传动件123工作,使得活塞122平移, 实现行车制动需求。同时,通过以上的压力信号、角度信号、位移信号等信号的正向反馈,监控行车制动状态,从而驱动单元22输出的驱动力可以暂时替代制动液装置30输出的液压驱动力,实现行车制动的基本功能。另外,在制动过程中,根据轮速信号,可以修整驱动单元22输出的驱动力,避免制动车轮5抱死,增加制动系统3的安全性。
液压油更换与排气功能:
在制动器10更换或制动液更换的过程中,进入液压油更换与排气功能:参见图3所示,打开排气螺栓181,同时驱动单元22通过第一传动件123和第二传动件21带动活塞122向右移动,使得制动腔体171的容积最小、并关闭排气螺栓181。然后执行换油过程:控制器40控制第一电磁阀32打开以使得油壶34与制动腔体171导通,同时控制器40控制驱动单元22通过第一传动件123和第二传动件21带动活塞122向左移动,抽取油壶34内制动液到制动腔体171内,制动液会推动活塞122向左移动。在制动腔体171的容积达到最大之后,控制第一电磁阀32关闭、并控制驱动单元22通过第一传动件123和第二传动件21带动活塞122向右移动,使得制动腔体171内的压力升高。压力传感器60检测到制动腔体171内的压力值达到设定的排气压力值时,松开排气螺栓181,排出制动腔体171内的气体。在制动腔体171内的压力降低之后,活塞122继续向右移动一段距离,将制动腔体171内的部分制动液排出,实现制动腔体171内的气体的完全排空。将排气螺栓181锁紧完成后,控制器40控制驱动单元22通过第一传动件123和第二传动件21带动活塞122沿第一方向继续往复平移,并进行制动腔体171压力与活塞122的移动行程计算对比,保证实现完全排气与制动液的更换。
液压油自动更换与排气功能:
参见图8所示,控制器40控制排气电磁阀182开启,制动腔体171与外部导通。同时控制器40控制驱动单元22通过第一传动件123和第二传动件21带动活塞122向右移动直至制动腔体171的容积最小,即活塞122到达最右侧,实现制动腔体171内空气的排出。然后,控制器40控制排气电磁阀182关闭以使得制动腔体171与外部关闭,同时控制第一电磁阀32开启以使得油壶34与制动腔体171导通。接着控制器40控制驱动单元22通过第一传动件123和第二传动件21带动活塞122向左移动,将油壶34中的制动液抽到制动腔体171中,实现制动液的自动的填充。在制动腔体171的容积达到最大之后,制动腔体171内部填充满制动液,此时控制器40控制排气电磁阀182、第一电磁阀32和第二电磁阀33关闭,且控制驱动单元22通过第一传动件123和第二传动件21带动活塞122右移。通过对比压力传感器60检测到的压力值与活塞122的移动距离对比计算出制动腔体171内部是否还残留空气。如果还有残留空气,则继续以上操作,以排出气体。
本申请实施例还提供一种应用于上述内容中的制动系统3的控制方法,该控制方法可以包括:
S11、获取行车制动信号、预设相对间距以及第一传动件123与活塞122之间的当前相对间距。其中,行车制动信号指的是需要对车辆1进行行车制动。
行车制动信号的获取可以根据车辆1的踏板机构是否输出建压信号、或者制动液 的压力是否发生变化等得到,这里不作限制。当前相对间距可以根据位移传感器50输出的位移信号计算得到。
S12、根据行车制动信号控制制动液装置30输出作用于活塞122的液压驱动力,实现行车制动。
具体地,根据行车制动信号得到需要进行行车制动后,控制制动液装置30的第一电磁阀32关闭、第二电磁阀33导通,从而制动液可以注入到制动腔体171内以推动活塞122带动摩擦片11夹紧制动盘2,实现行车制动。其中,液压驱动力通过制动液作用于活塞122。
S13、根据当前相对间距和预设相对间距控制驱动单元22通过第二传动件21带动第一传动件123转动,直至当前相对间距变为第一目标相对间距。
具体地,当前相对间距小于或等于预设相对间距时,控制驱动单元22通过第二传动件21带动第一传动件123转动,直至当前相对间距变为第一目标相对间距。当前相对间距大于预设相对间距时,活塞122用于接收液压驱动力并带动第一传动件123沿第一方向移动。
其中,通过在当前相对间距小于或等于预设相对间距后调整第一传动件123和活塞122的相对间距,可以避免行车过程中一直调整,可以在重刹车、急刹车等有可能刹停的情况下调整,有助于减小第一传动件123的磨损。另外,还可以在当前相对间距大于预设相对间距时,实现无差异行车制动。可以理解的是,预设相对间距小于第一目标相对间距。因此,通过包括S11、S12和S13,制动系统3可以实现随行预驻车功能。
在一些可能的实现方式中,本申请实施例提供的一种控制方法还可以包括:
S21、获取到行车异常信号和判断信号。
行车异常信号用于指示车辆1行车过程中摩擦片11与制动盘2是否接触异常,其中,可以根据第一传动件123和活塞122的当前相对间距计算得到摩擦片11与制动盘2是否接触异常。判断信号用于指示车辆1的踏板机构是否输出制动信号。
S22、根据行车异常信号和判断信号控制制动液装置30的第一电磁阀32导通、第二电磁阀33关闭。
具体地,在根据行车异常信号表明车辆1行车过程中摩擦片11与制动盘2是否接触异常,且车辆1的踏板机构没有输出制动信号时,控制第一电磁阀32导通、第二电磁阀33关闭。
S23、根据行车异常信号和判断信号控制驱动单元22通过第二传动件21带动第一传动件123转动,直至当前相对间距变为第二目标相对间距、并控制制动液装置30的第一电磁阀32关闭、第二电磁阀33导通。
具体地,在根据行车异常信号表明车辆1行车过程中摩擦片11与制动盘2是否接触异常,且车辆1的踏板机构没有输出制动信号时,通过控制驱动单元22工作,使得摩擦片11和制动盘2的间隙增加。因此,通过包括S21、S22和S23,制动系统3可以实现零滚阻功能。
在一些可能的实现方式中,本申请实施例提供的一种控制方法还可以包括:
S31、获取行车制动解除信号。
其中,行车制动解除信号指的是制动系统3对车辆1进行行车制动是否结束的信号。
S32、根据行车制动解除信号控制制动液装置30的第一电磁阀32关闭、第二电磁阀33导通。
具体地,通过行车制动解除信号得到行车制动结束后,控制第一电磁阀32关闭、第二电磁阀33导通。
S33、根据行车制动解除信号控制驱动单元22通过第二传动件21带动第一传动件123转动,直至当前相对间距变为第三目标相对间距。
具体地,通过行车制动解除信号得到行车制动结束后,控制驱动单元22工作,使得第一传动件123和活塞122之间的相对间距减小,实现活塞122快速退回,摩擦片11能够与制动盘2快速分离。因此,通过包括S31、S32和S33,制动系统3可以实现低拖滞快速复位功能。
在一些可能的实现方式中,本申请实施例提供的一种控制方法还包括:
S41、获取故障指示信号和控制参数。
其中,故障指示信号用于指示制动液装置30是否发生故障,控制参数包括压力信号、位移信号和角度信号。
S42、根据故障指示信号和控制参数控制驱动单元22通过第二传动件21带动第一传动件123转动,以实现冗余行车制动。
具体地,通过故障指示信号得到制动液装置30发生故障后,制动系统3进入冗余行车制动模式。制动系统3处于冗余行车制动模式时,根据控制参数控制驱动单元22工作,实现行车制动,确保车辆1行驶的安全性。另外,通过控制参数的正向反馈,可以监控行车制动状态,避免冗余行车制动的过程中出现抱死。因此,通过包括S41和S42,制动系统3可以实现冗余行车制动功能。
在申请实施例中,在执行步骤S41之前,本申请实施例提供的一种控制方法还可以包括:
S43、获取到行车制动失效信号时控制制动器10的制动腔体171的容积缩小、并获取当前的位移信号、压力信号和角度信号。
其中,行车制动失效信号指的是车辆1的制动踏板发出建压信号,但制动系统3的制动液的压力保持不变。
S44、根据当前的位移信号、压力信号和角度信号中的至少两个生成故障指示信号。
示例性地,根据位移信号和压力信号判断制动液装置30是否故障。其中,根据位移信号计算出活塞122的移动距离,如果活塞122的移动距离与压力信号对应的压力数值相匹配时则制动液装置30没有损坏。如果活塞122的移动距离与压力信号对应的压力数值无法匹配时则制动液装置30出现故障。
因此,通过包括S41、S42、S43和S44,制动系统3可以实现冗余行车制动以及故障检测功能。
在一些可能的实现方式中,本申请实施例提供的一种控制方法还可以包括:
S51、获取驻车制动信号和间隙异常信号。
其中,驻车制动信号指的是车辆1是否处于驻车状态,间隙异常信号指的是摩擦 片11与制动盘2之间的间隙大于调整阈值。
S52、根据驻车制动信号控制制动液装置30的第一电磁阀32导通、第二电磁关闭。
具体地,通过驻车制动信号得到车辆1处于驻车状态时,控制第一电磁阀32导通、第二电磁关闭。
S53、根据驻车制动信号和间隙异常信号控制驱动单元22通过第二传动件21带动第一传动件123转动,直至当前相对间距变为第四目标相对间距、并控制制动液装置30的第一电磁阀32关闭。
具体地,在车辆1驻车制动的过程中,可以根据当前相对间距可以监控驻车制动过程中活塞122的移动距离,从而可以得到摩擦片11与制动盘2的之间的间隙大小,进而可以得到摩擦片11与制动盘2之间的间隙是否大于调整阈值。当摩擦片11与制动盘2之间的间隙过大于调整阈值且车辆1处于驻车状态时,控制驱动单元22工作,使得活塞122和第一传动件123的当前相对间距变为第四目标间距,以减小摩擦片11和制动盘2之间的间隙。在调节相对间距完成后关闭第一电磁阀32,可以实现在任意非制动状态下,摩擦片11和制动盘2之间的间隙始终相同,实现基础制动空行程的一致性。因此,通过包括S51、S52和S53,制动系统3可以实现制动卡钳距离自适应调整功能。
在一些可能的实现方式中,本申请实施例提供的一种控制方法还可以包括:
S61、获取到液压油更换与排气信号时控制制动器10的排气口1213打开、并控制驱动单元22通过第二传动件21带动第一传动件123转动,直至制动器10的制动腔体171的容积达到最小、并控制制动器10的排气口1213关闭。
其中,将排气口1213打开或关闭的方式取决于密封排气口1213的排气件18的具体结构。例如当排气件18为排气螺栓181时,则手动打开或关闭排气口1213。当排气件18为排气电磁阀182时,可自动打开或关闭排气口1213。另外,通过步骤S61可以将制动腔体171内的制动液排出,另外还可以将制动腔体171内的部分空气排出。
S62、在制动腔体171的容积达到最小时控制制动液装置30的第一电磁阀32导通、并控制驱动单元22通过第二传动件21带动第一传动件123转动,直至制动腔体171的容积达到最大、并控制第一电磁阀32关闭。
其中,通过使制动腔体171的容积从最小变到最大,可以将制动液装置30的油壶34中的制动液抽入到制动腔体171内,可以实现制动液更换。
S63、控制驱动单元22通过第二传动件21带动第一传动件123转动、并获取制动腔体171内的当前压力值。
其中,当前压力值可以根据压力传感器60输出的压力信号得到。另外,驱动单元22带动第一传动件123转动,可以使得制动腔体171内的容积减小,进而使得制动腔体171内的压力值增加。
S64、根据当前压力值和预设排气压力值控制排气口1213打开,直至当前压力值降低为目标压力值、并控制排气口1213关闭。
具体地,当当前压力值等于或大于预设排气压力值时控制排气口1213打开,直至当前压力值降低为目标压力值、并控制排气口1213关闭。
因此,通过包括S61、S62、S63和S64,制动系统3可以实现液压油更换与排气 功能。
在本申请实施例中,为了尽可能的排出制动腔体171内的气体,在当前压力值降低为目标压力值之后,还可以包括步骤S65:控制驱动单元22通过第二传动件21带动第一传动件123转动,直至活塞122的移动距离为目标距离、并控制排气口1213关闭。
在一些可能的实现方式中,本申请实施例提供的一种控制方法还可以包括:
S71、获取行车信号、摩擦片11和制动盘2之间的预设间隙值、摩擦片11和制动盘2之间的当前间隙值。其中,行车信号用于表明车辆1是否处于行车状态。
S72、根据行车信号、当前间隙值和预设间隙值控制驱动单元22通过第二传动件21带动第一传动件123转动,直至当前间隙值变为目标间隙值。
具体地,通过行车信号得到车辆1处于行车状态时,根据当前间隙值和预设间隙值判断是否调整摩擦片11和制动盘2之间的间隙。其中,当当前间隙值或等于预设间隙值时,控制驱动单元22工作,使得当前间隙值变为目标间隙值,进而摩擦片11与制动盘2的间隙增加,摩擦片11与制动盘2之间的异物可被排出。可以理解的是,目标间隙值大于预设间隙值,目睹是增加摩擦片11与制动盘2之间的间隙,使得异物的尺寸小于摩擦片11与制动盘2之间的间隙。因此,通过包括S71和S72,制动系统3可以实现行车异物排出功能。
本申请实施例还提供一种计算机可读存储介质,计算机可读存储介质中存储有计算机执行指令,计算机执行指令被处理器执行时用于实现上述制动系统3的控制方法。其中,计算机可读存储介质可以包括:U盘、移动硬盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁盘或者光盘等各种可以存储程序代码的介质。
本申请实施例还提供一种计算机程序产品,其包括计算机程序,该计算机程序被处理器执行时实现上述制动系统3的控制方法。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。

Claims (33)

  1. 一种制动器,其特征在于,包括摩擦片、活塞、活塞缸、第一传动件和第二传动件;
    所述活塞设置于所述活塞缸的内部,所述活塞的一端与所述第一传动件相连,所述活塞的另一端与所述摩擦片固定连接,所述摩擦片设置于所述活塞缸的外部;
    所述第二传动件与所述第一传动件传动连接,所述第二传动件用于与驱动单元相连,所述驱动单元用于带动所述第二传动件绕平行于第一方向的转动轴线旋转;
    所述第一传动件用于将所述第二传动件的旋转运动转换为所述活塞沿所述第一方向的直线运动,当所述第一传动件沿所述第一方向移动时,所述第一传动件与所述第二传动件始终传动连接、且与所述活塞始终相连。
  2. 根据权利要求1所述的制动器,其特征在于,所述活塞背向所述摩擦片的一端包括配合孔,所述第一传动件包括丝杠部,所述丝杠部的轴线平行于所述第一方向,所述丝杠部的一端设置于所述配合孔的内部并与所述活塞相连,所述丝杠部的另一端与所述第二传动件传动连接。
  3. 根据权利要求2所述的制动器,其特征在于,所述丝杠部的一端与所述活塞螺纹连接;或者,
    所述丝杠部的一端与所述活塞用于构成滚珠丝杠机构。
  4. 根据权利要求1至3任一项所述的制动器,其特征在于,所述第二传动件包括贯穿所述第二传动件的花键孔,所述花键孔的轴线平行于所述第一方向;所述第一传动件靠近所述第二传动件的一端设置于所述花键孔内并与所述第二传动件花键连接;或者,
    所述第一传动件靠近所述第二传动件的一端的外壁包括多个第一凹槽,每个所述第一凹槽沿所述第一方向延伸,所述多个第一凹槽沿所述第一传动件的周向间隔设置;所述第二传动件包括多个滚珠件和第三传动件,所述第三传动件套设于所述第一传动件的外壁并用于与所述驱动单元相连,所述第三传动件朝向所述第一传动件的内表面包括多个第二凹槽,每个所述第二凹槽沿所述第二传动件的轴向延伸,所述多个第二凹槽沿所述第二传动件的周向间隔设置,所述多个第二凹槽分别与所述多个第一凹槽和所述多个滚珠件一一对应,每个所述滚珠件的相对两端分别设置于相对应的所述第一凹槽的内部和所述第二凹槽的内部。
  5. 根据权利要求1至4任一项所述的制动器,其特征在于,所述制动器还包括平面轴承,所述平面轴承设置于所述活塞缸的内部并与所述活塞缸固定连接,所述平面轴承套设于所述第一传动件的外壁并与所述第一传动件活动连接;
    所述第一传动件包括沿所述第一传动件的径向延伸的第一延伸部,沿所述第一方向所述第一延伸部设置于所述平面轴承和所述活塞之间,所述第一延伸部用于与所述平面轴承朝向所述活塞的一端的端面抵接。
  6. 根据权利要求1至5任一项所述的制动器,其特征在于,所述制动器还包括轴向限位机构,所述轴向限位机构设置于所述活塞缸的内部;
    所述第一传动件沿所述第一方向移动时,所述轴向限位机构用于避免所述第一传动件沿所述第一方向发生窜动。
  7. 根据权利要求6所述的制动器,其特征在于,所述轴向限位机构包括轴向配合部和轴向弹性部,所述轴向配合部固定连接于所述活塞缸的内壁,所述轴向弹性部的轴线平行于所述第一传动件的轴线,所述轴向弹性部的相对两端分别与所述轴向配合部和所述第一传动件的外壁相连。
  8. 根据权利要求1至7任一项所述的制动器,其特征在于,所述制动器还包括导向机构,所述导向机构的一部分设置于所述活塞缸,所述导向机构的另一部分设置于所述第一传动件,所述导向机构用于使所述活塞沿所述第一方向平动。
  9. 根据权利要求8所述的制动器,其特征在于,所述导向机构设置于所述活塞缸的内部,所述导向机构的一部分设置于所述活塞缸的内壁,所述导向机构的另一部分设置于所述第一传动件的外壁。
  10. 根据权利要求1至9任一项所述的制动器,其特征在于,所述活塞缸为中空结构,所述活塞缸的轴线平行于所述摩擦片的轴线;
    所述活塞的外壁与所述活塞缸的内壁共同限定出容积可变的制动腔体,所述活塞缸包括与所述制动腔体连通的进液开口,所述进液开口用于供制动液进出所述制动腔体;
    所述摩擦片和所述第二传动件设置于所述活塞缸的外部,所述第一传动件的一部分设置于所述活塞缸的内部,所述第一传动件的另一部分设置于所述活塞缸的外部并与所述第二传动件传动连接。
  11. 根据权利要求10所述的制动器,其特征在于,所述活塞与所述活塞缸之间设置有限位结构,所述限位结构用于在所述活塞沿所述第一方向移动时定位所述活塞和所述活塞缸的相对位置,使得所述制动腔体的容积最小。
  12. 根据权利要求10或11所述的制动器,其特征在于,所述活塞缸还包括与所述制动腔体连通的排气口,所述排气口用于导出所述制动腔体内的气体;
    所述制动器还包括排气件,所述排气件用于控制所述排气口的开闭。
  13. 根据权利要求12所述的制动器,其特征在于,所述排气件为排气螺栓,所述排气螺栓插设于所述排气口内并与所述活塞缸螺纹连接;或者,
    所述排气件为排气电磁阀,所述排气电磁阀与所述排气口相连并用于与控制器电连接,所述控制器用于控制所述排气电磁阀的通断以控制所述排气口的开闭。
  14. 根据权利要求10至13任一项所述的制动器,其特征在于,所述制动器还包括压力传感器,所述压力传感器用于根据所述制动液的压力输出压力信号。
  15. 根据权利要求1至14任一项所述的制动器,其特征在于,所述制动器还包括位移传感器,所述位移传感器固定连接于所述活塞缸,所述位移传感器用于根据所述第一传动件沿所述第一方向的移动输出位移信号。
  16. 一种制动系统,其特征在于,包括驱动单元和如权利要求1至15任一项所述的制动器,所述驱动单元与所述制动器的第二传动件相连。
  17. 根据权利要求16所述的制动系统,其特征在于,所述驱动单元包括电机,所述电机的电机轴与所述制动器的所述第二传动件相连:
    所述电机包括角度传感器,所述角度传感器用于根据所述电机的电机轴的转动角度和转向输出角度信号。
  18. 根据权利要求16或17所述的制动系统,其特征在于,所述制动系统还包括制动液装置,所述制动液装置与所述制动器的进液开口相连通,所述制动液装置用于控制制动液进出所述制动器的制动腔体。
  19. 根据权利要求18所述的制动系统,其特征在于,所述制动液装置包括制动液管路、第一电磁阀、第二电磁阀和油壶;
    所述制动液管路的第一接口用于与所述制动器的进液开口相连通,所述制动液管路的第二接口通过所述第一电磁阀与所述油壶相连通,所述制动液管路的第三接口与所述第二电磁阀的第一接口相连通;
    所述第二电磁阀的第二接口用于供制动液进出所述制动液管路。
  20. 根据权利要求16至19任一项所述的制动系统,其特征在于,所述制动系统还包括控制器,所述控制器分别所述驱动单元和所述制动器电连接、且用于与制动液装置电连接。
  21. 一种车辆,其特征在于,包括车轮以及如权利要求16至20任一项所述的制动系统,所述制动系统用于制动车轮。
  22. 一种控制方法,应用于制动系统,其特征在于,所述制动系统包括制动液装置、驱动单元和权利要求1至16任一项所述的制动器,其中:所述制动器包括摩擦片、活塞、第一传动件和第二传动件,所述摩擦片和所述活塞沿所述第一方向并排设置,所述活塞的一端与所述摩擦片固定连接,所述活塞的另一端与所述第一传动件相连,所述第一传动件与所述第二传动件传动连接,所述第二传动件与所述驱动单元相连;
    所述控制方法包括:
    获取行车制动信号、预设相对间距以及所述第一传动件与所述活塞之间的当前相对间距;其中,所述行车制动信号指的是需要对车辆进行行车制动;
    根据所述行车制动信号控制所述制动液装置输出作用于所述活塞的液压驱动力,实现行车制动;
    根据所述当前相对间距和所述预设相对间距控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前相对间距变为第一目标相对间距。
  23. 根据权利要求22所述的方法,其特征在于,根据所述当前相对间距和所述预设相对间距控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前相对间距变为第一目标相对间距,包括:
    当所述当前相对间距小于或等于预设相对间距时,控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前相对间距变为第一目标相对间距;
    当所述当前相对间距大于预设相对间距时,所述活塞用于接收液压驱动力并带动所述第一传动件沿所述第一方向移动。
  24. 根据权利要求22所述的方法,其特征在于,所述制动液装置包括制动液管路、第一电磁阀、第二电磁阀和油壶,所述制动液管路的第一接口与所述制动器的进液开口相连通,所述制动液管路的第二接口通过所述第一电磁阀与所述油壶相连通,所述制动液管路的第三接口与所述第二电磁阀的第一接口相连通,所述第二电磁阀的第二接口用于供制动液进出所述制动液管路;
    所述控制方法还包括:
    获取到行车异常信号和判断信号;其中,所述行车异常信号用于指示车辆行车过程中摩擦片与制动盘是否接触异常,所述判断信号用于指示所述车辆的踏板机构是否输出制动信号;
    根据所述行车异常信号和所述判断信号控制所述制动液装置的所述第一电磁阀导通、所述第二电磁阀关闭;
    根据所述行车异常信号和所述判断信号控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前相对间距变为第二目标相对间距、并控制所述制动液装置的所述第一电磁阀关闭、所述第二电磁阀导通。
  25. 根据权利要求22所述的方法,其特征在于,所述控制方法还包括:
    获取行车制动解除信号,其中,所述行车制动解除信号指的是所述制动系统对车辆进行行车制动是否结束的信号;
    根据所述行车制动解除信号控制所述制动液装置的第一电磁阀关闭、第二电磁阀导通;
    根据所述行车制动解除信号控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前相对间距变为第三目标相对间距。
  26. 根据权利要求22所述的方法,其特征在于,所述驱动单元包括具有角度传感器的电机,所述角度传感器在所述电机工作时输出角度信号,所述制动器还包括压力传感器和位移传感器,所述压力传感器用于根据制动液的压力输出压力信号,所述位移传感器用于根据所述第一传动件沿所述第一方向的移动输出位移信号;
    所述控制方法还包括:
    获取故障指示信号和控制参数;其中,所述故障指示信号用于指示所述制动液装置是否发生故障,所述控制参数包括所述压力信号、所述位移信号和所述角度信号;
    根据所述故障指示信号和所述控制参数控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,以实现冗余行车制动。
  27. 根据权利要求26所述的方法,其特征在于,在所述获取故障指示信号和控制参数之前,还包括:
    获取到行车制动失效信号时控制所述制动器的制动腔体的容积缩小、并获取当前的所述位移信号、所述压力信号和所述角度信号;其中,所述行车制动失效信号指的是车辆的制动踏板发出建压信号,但所述制动系统的制动液的压力保持不变;
    根据所述当前的所述位移信号、所述压力信号和所述角度信号中的至少两个生成所述故障指示信号。
  28. 根据权利要求22所述的方法,其特征在于,所述控制方法还包括:
    获取驻车制动信号和间隙异常信号;其中,驻车制动信号指的是车辆是否处于驻车状态,间隙异常信号指的是摩擦片与制动盘之间的间隙大于调整阈值;
    根据所述驻车制动信号控制制动液装置的第一电磁阀导通、第二电磁关闭;
    根据所述驻车制动信号和所述间隙异常信号控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前相对间距变为第四目标相对间距、并控制所述制动液装置的所述第一电磁阀关闭。
  29. 根据权利要求22所述的方法,其特征在于,所述控制方法还包括:
    获取到液压油更换与排气信号时控制所述制动腔体的排气口打开、并控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述制动腔体的容积达到最小、并控制所述制动腔体的排气口关闭;
    在所述制动腔体的容积达到最小时控制所述制动液装置的第一电磁阀导通、并控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述制动腔体的容积达到最大、并控制所述第一电磁阀关闭;
    控制所述驱动单元通过所述第二传动件带动所述第一传动件转动、并获取所述制动腔体内的当前压力值;
    根据所述当前压力值和预设排气压力值控制所述排气口打开,直至所述当前压力值降低为目标压力值、并控制所述排气口关闭。
  30. 根据权利要求29所述的方法,其特征在于,在所述当前压力值降低为目标压力值之后,还包括:
    控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述活塞的移动距离为目标距离、并控制所述排气口关闭。
  31. 根据权利要求22所述的方法,其特征在于,所述控制方法还包括:
    获取行车信号、所述摩擦片和制动盘之间的预设间隙值、所述摩擦片和制动盘之间的当前间隙值;其中,所述行车信号用于表明车辆是否处于行车状态;
    根据所述行车信号、所述当前间隙值和预设间隙值控制所述驱动单元通过所述第二传动件带动所述第一传动件转动,直至所述当前间隙值变为目标间隙值。
  32. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质中存储有计算机执行指令,所述计算机执行指令被处理器执行时用于实现如权利要求22至31任一项所述的方法。
  33. 一种计算机程序产品,其特征在于,包括计算机程序,该计算机程序被处理器执行时实现权利要求22至31任一项所述的方法。
PCT/CN2023/079923 2023-03-06 2023-03-06 控制方法、制动器、制动系统、车辆、存储介质及产品 Ceased WO2024182982A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202380089880.1A CN120513189A (zh) 2023-03-06 2023-03-06 控制方法、制动器、制动系统、车辆、存储介质及产品
EP23925707.4A EP4674708A4 (en) 2023-03-06 2023-03-06 CONTROL METHOD, BRAKE, BRAKING SYSTEM, VEHICLE, RECORDING MEDIA AND PRODUCT
PCT/CN2023/079923 WO2024182982A1 (zh) 2023-03-06 2023-03-06 控制方法、制动器、制动系统、车辆、存储介质及产品

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2023/079923 WO2024182982A1 (zh) 2023-03-06 2023-03-06 控制方法、制动器、制动系统、车辆、存储介质及产品

Publications (1)

Publication Number Publication Date
WO2024182982A1 true WO2024182982A1 (zh) 2024-09-12

Family

ID=92673914

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/079923 Ceased WO2024182982A1 (zh) 2023-03-06 2023-03-06 控制方法、制动器、制动系统、车辆、存储介质及产品

Country Status (3)

Country Link
EP (1) EP4674708A4 (zh)
CN (1) CN120513189A (zh)
WO (1) WO2024182982A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05321961A (ja) * 1992-05-15 1993-12-07 Toyota Motor Corp ディスクブレーキ
CN103994164A (zh) * 2013-02-18 2014-08-20 株式会社万都 电动钳式制动器
JP2020001641A (ja) * 2018-06-29 2020-01-09 株式会社アドヴィックス 常用兼駐車ブレーキ装置
US20220024434A1 (en) * 2020-07-24 2022-01-27 Mando Corporation Electromechanical brake and operation method thereof
CN115366863A (zh) * 2021-05-18 2022-11-22 沃尔沃汽车公司 机动车制动摩擦片损耗监测系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9520616D0 (en) * 1995-10-09 1995-12-13 Lucas Ind Plc Improvements in electrically-operated disc brake assemblies for vehicles
NL1009197C2 (nl) * 1998-05-18 1999-11-19 Skf Eng & Res Centre Bv Schroefactuator, en remklauw met een dergelijke schroefactuator.
DE102005022400B4 (de) * 2005-05-13 2016-08-18 Robert Bosch Gmbh Hydraulische Fahrzeugbremse mit Feststelleinrichtung und Verfahren zur Funktionsüberprüfung der Feststellbremse
JP2018168918A (ja) * 2017-03-29 2018-11-01 株式会社ジェイテクト ボールねじ装置
KR102878771B1 (ko) * 2020-01-13 2025-10-31 현대모비스 주식회사 차량용 브레이크 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05321961A (ja) * 1992-05-15 1993-12-07 Toyota Motor Corp ディスクブレーキ
CN103994164A (zh) * 2013-02-18 2014-08-20 株式会社万都 电动钳式制动器
JP2020001641A (ja) * 2018-06-29 2020-01-09 株式会社アドヴィックス 常用兼駐車ブレーキ装置
US20220024434A1 (en) * 2020-07-24 2022-01-27 Mando Corporation Electromechanical brake and operation method thereof
CN115366863A (zh) * 2021-05-18 2022-11-22 沃尔沃汽车公司 机动车制动摩擦片损耗监测系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4674708A4 *

Also Published As

Publication number Publication date
EP4674708A1 (en) 2026-01-07
CN120513189A (zh) 2025-08-19
EP4674708A4 (en) 2026-04-22

Similar Documents

Publication Publication Date Title
CN104670482B (zh) 蜗轮蜗杆式飞机电刹车系统及工作方法
JP6927478B2 (ja) 電動ブレーキ装置およびそれを備えたブレーキシステム
US20100006380A1 (en) Commercial-vehicle braking system and commercial vehicle
CN105715707B (zh) 电动推杆式汽车盘式制动器控制装置
CN113483038A (zh) 一种带自补偿的制动器及其制动方法
CN104442784A (zh) 集成电机电控制动主缸驱动系统
CN105691213B (zh) 一种电磁制动与摩擦制动集成制动装置的工作方法
CN105673731B (zh) 一种电磁制动与摩擦制动集成制动装置
CN112443596B (zh) 线控制动系统及车辆
US20240246518A1 (en) Brake apparatus and method of controlling the same
US20130333552A1 (en) Device for receiving and dispensing hydraulic fluid, in particular for a hybrid or electric vehicle, and braking system for a hybrid or electric vehicle
CN117864084A (zh) 叉车制动系统及具有其的叉车
CN109340277B (zh) 液压制动夹钳
US20180273009A1 (en) Braking control device for vehicle
CN109027063B (zh) 风力发电机组的变压力偏航制动液压系统及其控制方法
EP4674708A1 (en) Control method, brake, braking system, vehicle, storage medium, and product
CN112145582B (zh) 盘式制动器、线控制动系统以及车辆
US20190315356A1 (en) System and method for preventing overheating of axle in construction machine
CN204527620U (zh) 蜗轮蜗杆式飞机电刹车系统
CN117002271B (zh) 一种多模式控制方法及制动控制单元
WO2017010900A1 (en) Brake kinetic energy recovery system
CN103925318B (zh) 一种常闭式停车制动器
CN208010808U (zh) 一种柱塞缸推动锥形导轨的径向摩擦式离合器
CN119428604B (zh) 一种带机械备份制动的车辆液压制动装置及应用
KR101813965B1 (ko) 전동 브레이크 장치의 디스크 패드 간극 제어 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23925707

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202380089880.1

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 202380089880.1

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2023925707

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2023925707

Country of ref document: EP

Effective date: 20251002

ENP Entry into the national phase

Ref document number: 2023925707

Country of ref document: EP

Effective date: 20251002

ENP Entry into the national phase

Ref document number: 2023925707

Country of ref document: EP

Effective date: 20251002

WWP Wipo information: published in national office

Ref document number: 2023925707

Country of ref document: EP