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 PDFInfo
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE 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
- B60T13/00—Transmitting 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
- B60T13/74—Transmitting 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
- B60T13/741—Transmitting 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/18—Actuating 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
- F16D65/183—Actuating 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/24—Electric or magnetic using motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2123/00—Multiple operation forces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/06—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
- F16D2125/40—Screw-and-nut
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/44—Mechanical mechanisms transmitting rotation
- F16D2125/46—Rotating members in mutual engagement
- F16D2125/48—Rotating 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.
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Abstract
Description
Claims (33)
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
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| 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 |
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2023
- 2023-03-06 CN CN202380089880.1A patent/CN120513189A/zh active Pending
- 2023-03-06 WO PCT/CN2023/079923 patent/WO2024182982A1/zh not_active Ceased
- 2023-03-06 EP EP23925707.4A patent/EP4674708A4/en active Pending
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| 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 |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP4674708A1 (en) | 2026-01-07 |
| CN120513189A (zh) | 2025-08-19 |
| EP4674708A4 (en) | 2026-04-22 |
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