WO2015102120A1 - Dispositif de commande hydraulique et engin de construction qui en est équipé - Google Patents

Dispositif de commande hydraulique et engin de construction qui en est équipé Download PDF

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Publication number
WO2015102120A1
WO2015102120A1 PCT/KR2013/012384 KR2013012384W WO2015102120A1 WO 2015102120 A1 WO2015102120 A1 WO 2015102120A1 KR 2013012384 W KR2013012384 W KR 2013012384W WO 2015102120 A1 WO2015102120 A1 WO 2015102120A1
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WIPO (PCT)
Prior art keywords
coupler
valve
hydraulic
passage
hydraulic pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2013/012384
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English (en)
Korean (ko)
Inventor
이승현
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volvo Construction Equipment AB
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Volvo Construction Equipment AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Volvo Construction Equipment AB filed Critical Volvo Construction Equipment AB
Priority to PCT/KR2013/012384 priority Critical patent/WO2015102120A1/fr
Publication of WO2015102120A1 publication Critical patent/WO2015102120A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3663—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat hydraulically-operated
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20523—Internal combustion engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6346—Electronic controllers using input signals representing a state of input means, e.g. joystick position

Definitions

  • the present invention relates to a hydraulic control device and a construction machine having the same, and the state of the coupler locked and released when the working device including a breaker, hammer, dozer blade, etc. mounted on the construction machine by the quick coupler
  • the present invention relates to an improved hydraulic control device for monitoring and controlling the same and a construction machine having the same.
  • Construction machinery including excavators are used as a work tool to fit the work required at the construction site by attaching various optional devices including buckets, breakers, hammers, shears, dozer blades, etc. to the tip of the arm.
  • the option device can be mounted or replaced by a quick coupler and is operated by hydraulic pressure.
  • Korean Patent No. 2013-0062322 discloses a quick coupler hydraulic circuit of a construction machine.
  • Figure 1 schematically shows a conventional quick coupler, typically a quick coupler having a hook or coupler tooth (2), by the expansion and contraction of the hydraulic cylinder inside the coupler body (1) 2) is configured to fix the connection of the optional device.
  • the above-mentioned quick coupler hydraulic circuit requires that the hydraulic pump always be boosted between the lock position and the release position at the time of replacement of the work device, and during the boosting of such a hydraulic pump, the working actuator, for example the boom cylinder or the arm cylinder and the swing motor In order to solve the problem that the movement becomes unstable, and accordingly the fuel economy is deteriorated, it was intended to control the boosting time or timing of the hydraulic pump.
  • the above-described prior art also does not allow the user in the cab to visually check or recognize the lock state and the unlock state of the quick coupler, and the user can directly check whether the work device or the optional device is detached from the quick coupler or is in a safe state. There is a problem that cannot be determined and controlled.
  • the present invention was created to solve the above problems,
  • An object of the present invention is to provide a hydraulic control device and a construction machine having the same.
  • a hydraulic actuator for driving a work tool including a boom or an arm
  • a main control valve installed in a main flow path between the variable displacement hydraulic pump and the hydraulic actuator and controlling hydraulic oil discharged from the variable displacement hydraulic pump for starting, stopping, and reversing the work device;
  • a coupling release passage and a coupling lock passage connected to the coupler cylinder and the coupler cylinder, and when the option device is attached or assembled, the coupler cylinder operates in the lock position by the hydraulic oil supplied from the fixed hydraulic pump.
  • Quick disconnect valve block to operate in the release position by the hydraulic oil supplied from the variable displacement hydraulic pump when detaching or disassembling;
  • Coupler control valve for controlling the;
  • a pilot direction switching valve installed between the quick coupler valve block and the variable displacement hydraulic pump and connecting the main channel to the coupler control valve when switching by a pilot signal pressure supplied through the coupling release channel;
  • a hydraulic control device that includes a controller that initially provides a safety confirmation function and provides a safety monitoring function during operation of the option device.
  • the user can easily grasp the coupler coupling and fixing state according to the safety check function, and work using the optional device at the construction site by the safety monitoring function. It prevents the option device from being separated, removed or detached from the quick coupler during crushing or flattening.
  • a safety valve is configured in a hydraulic line connected between the coupler control valve and the fixed hydraulic pump, and the safety valve is opened and closed in response to a valve control signal provided from the controller. Is controlled to switch to.
  • a pressure sensor is provided in each of the coupling release passage and the coupling lock passage formed downstream of the coupler control valve, and the pressure sensors are the coupling release passage and A predetermined current change signal is provided to the controller corresponding to the change in the hydraulic pressure formed in the coupling lock flow path.
  • safety is dependent on the change in the hydraulic pressure supplied to the hydraulic cylinder for the quick coupler through the coupler control valve and the current change of the pressure sensor. Check the status and show it to the user.
  • the controller performs a safety check function in dependence on the pressure change of the pressure sensor installed in the decoupling passage, and outputs the safety or abnormal state information determined by a preset algorithm to the display unit. do.
  • the controller performs a safety monitoring function in accordance with the pressure change of the pressure sensor installed in the coupling lock flow path, and outputs the information of the safety or abnormal state determined in accordance with a predetermined algorithm to the display unit.
  • a shuttle valve is configured in a hydraulic line connected between the coupler control valve and the fixed hydraulic pump, and the shuttle valve is provided through the pilot directional control valve during the release operation of the coupler function switch.
  • the high pressure hydraulic fluid introduced is provided to the coupler control valve.
  • An cab installed on one side of the upper frame and provided with a plurality of operating device operating means including a safety switch therein;
  • At least one hydraulic actuator for driving a work tool comprising a boom or an arm;
  • a main control valve installed between the variable displacement hydraulic pump and the hydraulic actuator and controlling hydraulic oil discharged from the variable displacement hydraulic pump for starting, stopping, and reversing the work device;
  • a coupling release passage and a coupling lock passage connected to the coupler cylinder and the coupler cylinder, and when the option device is attached or assembled, the coupler cylinder operates in the lock position by the hydraulic oil supplied from the fixed hydraulic pump.
  • Quick disconnect valve block to operate in the release position by the hydraulic oil supplied from the variable displacement hydraulic pump when detaching or disassembling;
  • Coupler control valve for controlling the;
  • a pilot direction switching valve installed between the quick coupler valve block and the variable displacement hydraulic pump and connecting the main channel to the coupler control valve when switching by a pilot signal pressure supplied through the coupling release channel;
  • a construction machine comprising a controller that initially provides a safety confirmation function and a controller that provides a safety monitoring function during operation of the optional device.
  • the hydraulic control device in the case of carrying out excavation work, flattening or crushing work by attaching and assembling an optional device to a construction machine by a quick coupler, changes in the hydraulic pressure supplied to the coupler cylinder through the coupler control valve and The safety status can be checked and controlled depending on the current change of the pressure sensor, and the result can be displayed to the user as an indication and an alarm, so that the quick coupler and the optional device can be operated stably.
  • the hydraulic control device and the construction machine having the same according to the present invention there is an advantage that can prevent the accident that the option device is abnormally detached or detached from the quick coupler during construction work.
  • FIG. 1 is a side view schematically showing a conventional quick coupler
  • FIG. 2 is a hydraulic circuit diagram showing a hydraulic control apparatus according to an embodiment of the present invention.
  • FIG. 3 is a flow chart schematically illustrating a process in which a safety monitoring function is performed with respect to a quick coupler valve and a coupler control valve during a construction operation according to an embodiment of the present invention
  • FIG. 4 is a graph illustrating a change in pressure in a quick coupler valve block when a safety check function and a safety monitoring function are performed according to an embodiment of the present invention
  • FIG. 5 is a graph illustrating a current change with respect to a pressure change between a quick coupler valve block and a coupler control valve according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram showing an excavator equipped with a hydraulic control device according to an embodiment of the present invention
  • the pressure change or the coupling of the coupling release passage 22 between the quick coupler valve block 20 and the coupler control valve 15 installed in the quick coupler body 40 is useful to prevent the release of the option device depending on the pressure change of the locking passage 23.
  • a hydraulic control apparatus includes an engine E and a variable displacement hydraulic pump P1 and a fixed hydraulic pump 3 connected to the engine E.
  • FIG. It is configured to include.
  • the variable displacement hydraulic pump P1 is optional as well as a hydraulic actuator for driving a work device including a boom 65 or an arm 66, for example, the boom cylinder 68 and the arm cylinder 69.
  • One side of the arm 66 is equipped with a hydraulic cylinder 60 for driving an option device 67 including a breaker or a hammer and a dozer blade instead of the above-described bucket cylinder, and a quick end of the arm 66 Coupler body 40 is coupled.
  • the quick coupler body 40 has a hook or tooth 2 having the same structure as in the related art, and the option device is provided by hydraulic pressure formed in the quick coupler valve block 20 configured inside the quick coupler body 40. 67) and a coupling coupling.
  • the quick coupler valve block 20 will be described later.
  • the hydraulic control apparatus is installed in the main flow passage 11 between the variable displacement hydraulic pump P1 and the hydraulic actuator, and the variable displacement hydraulic pressure is used to start, stop, and change the direction of the work device. It is configured to include a main control valve 32 for controlling the hydraulic oil discharged from the pump (P1).
  • the main control valve 32 has a plurality of work device spools 12a and 12b therein for driving the boom 65 or the arm 66 and the option device 67 therein.
  • the quick coupler valve block 20 includes a coupler cylinder 21, a coupling release passage 22 and a coupling lock passage 23 connected to the coupler cylinder 21, and an optional device ( 67) when the attachment or assembly of the operation is operated in the lock position by the hydraulic oil supplied from the fixed-type hydraulic pump (3), when the option device 67 is removed or disassembled it is supplied from the variable displacement hydraulic pump (P1) It is operated in the release position by the working oil.
  • the pilot check valve 19 for safety in the coupler release operation may be further installed on the coupling release passage 22.
  • release means a state in which the piston is contracted or a valve switching state therefor for the quick coupler to be detached from the inside of the tube of the coupler cylinder 21, and the locking means the tube of the coupler cylinder 21. It can be interpreted to explain the expansion of the piston outwardly or the valve switching state therefor.
  • the coupler control valve 15 includes a solenoid part receiving a valve switching signal through a control line 28 and is configured to be connected to the coupling release passage 22 and the coupling lock passage 23. do.
  • the coupler control valve 15 is switched at the time of the release operation of the coupler function switch 24, so that the coupler cylinder (from the variable displacement hydraulic pump P1 through the coupling release passage 22) The flow of the hydraulic oil supplied to the 21 and the hydraulic oil discharged to the hydraulic tank (T) through the coupling lock passage 23 is controlled.
  • Pilot directional control valve 16 is installed between the quick coupler valve block 20 and the variable displacement hydraulic pump (P1), the pilot signal supplied through the coupling release passage (22) When switching by pressure, the main flow passage 11 is connected to the coupler control valve 15.
  • the pilot direction switching valve 16 is an internal flow passage connected to the main flow passage 11 to provide hydraulic pressure discharged from the variable displacement hydraulic pump P1 to the coupler control valve 15 at the time of spool switching ( 16a).
  • the controller 5 selectively outputs a control signal for switching operation of the coupler control valve 15 in response to the operation of the coupler function switch 24, and the coupling release passage 22. And a safety check function at the beginning of the attachment, assembly or replacement of the option device 67 depending on the pressure change of each coupling lock flow path 23 and a safety monitoring function during the operation of the option device 67. do.
  • pressure sensors 29 and 30 are installed in each of the coupling release passage 22 and the coupling lock passage 23 formed on the downstream side of the coupler control valve 15.
  • the pressure sensors 29 and 30 may provide a predetermined current change signal to the controller 5 in response to a change in hydraulic pressure formed in the decoupling passage 22 and the coupling lock passage 23. do.
  • the hydraulic pressure supplied to the coupler cylinder 21 through the coupler control valve 15 when the option device 67 is assembled and mounted on the quick coupler body 40 during the excavation, flattening or crushing operation In accordance with the change and the current change of the pressure sensor (29, 30) to check the safety status to provide an indication or alarm to the user.
  • the controller 5 performs a safety check function in accordance with the pressure change of the pressure sensor 29 installed in the decoupling passage 22, and the safety or Information on the abnormal state is output to the display unit 6.
  • the display unit 6 may output an image, symbol or text for the user to recognize a safe state or a function operating state.
  • the safety check function described above is preferably performed at the initial stage when the option device 67 is assembled and mounted on the quick coupler body 40.
  • the safety monitoring function described below, as well as the safety monitoring function described above, depend on the pressure change of each of the decoupling passage 22 and the coupling lock passage 23 while the option device 67 is used at the construction site. Thereby providing a user with information about the hydraulic condition of the coupler cylinder 21 to the user in the cab 61.
  • the safety monitoring function is preferably performed in the course of construction work using the option device 67 after the option device 67 is assembled and mounted. .
  • the safety monitoring function includes detecting a change in pressure of the decoupling passage 22 from the pressure sensor 29 and transmitting the pressure change to the controller 5 and outputting the output value of the pressure change in a preset range.
  • the display unit 6 indicates to the coupler locked state, and the output value of the pressure change is not included in the preset range in the step. Otherwise, adjusting the valve opening degree of the coupler control valve 15 and then controlling to detect the pressure change of the pressure sensor 29 again after a preset time delay.
  • the safety monitoring function which depends on the pressure change of the decoupling passage 22, may be configured to display a display unit (not shown) as alarm information or display information to a user as a safety or abnormal state determined and determined according to a preset algorithm in the controller 5. 6) can be output.
  • the above-described safety monitoring function may be performed depending on the pressure change of the coupling lock passage 23.
  • the safety monitoring function relating to the pressure change of the coupling lock flow path 23 detects the pressure change of the coupling lock flow path 23 from the pressure sensor 30 and transmits it to the controller 5. And comparing and determining the output value of the pressure change with a preset range, and if the output value of the pressure change is included in the preset range in the step, the display unit 6 indicates the coupler locked state.
  • the safety monitoring function if the output value of the pressure change in the step is not included in the preset range, the valve opening degree of the coupler control valve 15 is adjusted to the control signal by the controller 5, and then After the preset time delay, the pressure sensor 30 detects the pressure change again.
  • the above-described safety monitoring function is to respond to the pressure change of the flow path constituted between the quick coupler valve block 20 and the coupler control valve 15, and the coupling release flow passage 22 and the coupling lock flow passage 23. This also applies to simultaneous changes in).
  • the safety valve 4 is configured in the hydraulic line 10 connected between the coupler control valve 15 and the fixed hydraulic pump (3), the safety valve (4) ) Is controlled to switch to the open and closed positions in response to the valve control signal provided from the controller 5.
  • the safety valve 4 may be configured as a solenoid valve that receives a control signal for opening degree or valve port switching of the valve from the controller 5 through the control line 27 electrically connected.
  • the safety valve 4 can be controlled irrespective of whether the coupler function switch 24 is operated, and whether or not the coupler function switch 24 is operated depending on the operation of the safety switch 8 by a user. Regardless of the flow rate of the fixed hydraulic pump 3 provided through the supply line 10 can be controlled.
  • the safety valve (4) of the fixed hydraulic pump (3) provided to the supply line (10) or the coupler cylinder (21) depending on the operation of the coupler function switch 24 and the safety switch (8) Flow rate can be controlled.
  • the hydraulic valve connected between the coupler control valve 15 and the fixed hydraulic pump 3 is further configured with a shuttle valve 18, the shuttle valve 18 is the release operation of the coupler function switch 24
  • the high pressure hydraulic fluid introduced through the pilot directional control valve 16 is selected and provided to the coupler control valve 15.
  • the flow rate supplied to the coupler control valve 15 through the pilot direction switching valve 16 may be determined by the hydraulic pressure discharged from the variable displacement hydraulic pump (P1).
  • the non-return check valve 17 may be further installed in the hydraulic oil supply line 10 of the fixed hydraulic pump 3 connected between the shuttle valve 18 and the safety valve 4.
  • the above-described hydraulic control device is applied to a construction machine.
  • the construction machine according to the present invention, the lower running body 62 moving along the ground at the construction site, the upper frame 63 rotatably mounted on the lower running body, An engine installed in one side of the upper frame 62 and equipped with an cab 61 and an engine room 64 provided with a plurality of operating device operating means 9 including a safety switch 8 therein ( E), at least one hydraulic actuator for driving a work device including a variable displacement hydraulic pump P1 and a fixed hydraulic pump 3, a boom 65 or an arm 66 connected to the engine E ( 13) installed between the variable displacement hydraulic pump P1 and the hydraulic actuator 13 to control the hydraulic fluid discharged from the variable displacement hydraulic pump P1 for starting, stopping and reorienting the work device.
  • the main control valve 32 is configured to include.
  • the construction machine according to the present invention has a coupler cylinder 21 and a coupling release passage 22 and a coupling lock passage 23 connected to the coupler cylinder 21 and the attachment of the option device 67.
  • the assembly is operated at the lock position by the hydraulic oil supplied from the fixed hydraulic pump 3, and released by the hydraulic oil supplied from the variable displacement hydraulic pump P1 when the option device 67 is detached or disassembled.
  • the coupler cylinder is switched between the quick coupler valve block 20 and the coupler function switch 24 which are operated in a position and are changed from the variable displacement hydraulic pump P1 to the coupling release passage 22.
  • the boom 5 When the construction machine according to the present invention is applied to an excavator, the boom 5 is pivotally mounted on the upper frame 3, and the up and down of the construction machine by the extension and contraction drive of the boom cylinder (65) Direction is activated.
  • the arm 66 is pivotally connected at the distal end of the boom 65 to move in the front-rear direction of the construction machine by the extension and contraction drive of the arm cylinder 69, the option device 67 is the arm ( It is connected and fixed by the quick coupler body 40 at the tip of 6).
  • the main control valve 32 includes a spool 12a for an optional device including a breaker or a hammer as a work device, and a boom 65 or an arm (a front work device well known in a conventional construction machine). It will be apparent to those skilled in the art that the valve spool 12b for various work tools, etc. may be configured.
  • the user releases the coupler function switch 24 in order to replace a work device or a front work device including the option device 67 in the cab 61.
  • a predetermined control signal is input to the controller 5 through the control line 25, and the controller 5 is a valve switching signal to the coupler control valve 15 through the control line 28.
  • the coupler control valve 15 is switched to the left in the figure depending on the valve change signal. At this time, some of the hydraulic pressure discharged from the supply line 10 connected from the fixed hydraulic pump 3 passes through the coupler control valve 15 and partially sends a direction switching signal to the pilot direction switching valve 16. The hydraulic pressure is supplied to the coupler cylinder 21 of the quick coupler valve block 20 through the coupling release passage 22.
  • the high-pressure drawing oil provided through the main flow passage 11 of the variable displacement hydraulic pump P1 through the pilot directional control valve 16 is coupled to the quick coupler valve block through the coupling release flow passage 22.
  • the option device 67 can be released from the quick coupler body 40 by being supplied to the coupler cylinder 31 installed at 20). In this process, the hydraulic pressure which kept the coupler cylinder 21 in the locked state is returned to the hydraulic tank T through the coupling lock flow path 23, the coupler control valve 15, and the return line 14. .
  • the hydraulic or hydraulic oil of the coupling release passage 22 is returned to the hydraulic tank T through the switched coupler control valve 15 and the return line 14.
  • the hydraulic control apparatus operates depending on the pressure change of the coupling lock passage and the coupling release passage, and the pressure changes according to the coupler lock and release states as shown in FIG. 4.
  • section A indicates that the quick coupler remains locked
  • section B indicates that the quick coupler is in the unlocking state
  • section C indicates that the quick coupler is in the locked state
  • section D the relief after the quick coupler locks. It indicates the status of being If there is no change in the operation of the quick coupler after the D section, the pressure of the coupler lock passage 23 converges in the stabilization direction with the pressure in the section "A" state for a certain time.
  • the detection and output in the pressure sensor (29, 30) mounted on the decoupling passage 22 and the coupling lock passage 23 is compared through the controller (4) And judged.
  • the pressure sensors 29 and 30 may be output as a linear straight line value in which the current value, which is an output value, increases as the measured pressure value increases, and the pressure sensor measurement section E represents a release pressure section including a pressure tolerance. It can be determined by the range.
  • the controller 5 when a predetermined output value is input from the pressure sensor 29 of the coupling release passage 22 to the controller 5 at a current value corresponding to the section E, the controller 5 is assembled with the quick coupler. And determine that the mounting is normally maintained in a safe state, and provide information of a safe state to the user through the display unit 6. On the other hand, if the current output from the pressure sensor 30 of the coupling lock passage 23 in the construction process corresponds to the value of the section F, the coupling and fastening of the quick coupler is loosened or disengaged, so that the controller 5 It is determined that the abnormal state to adjust the opening degree of the coupler control valve 15.
  • the controller 5 instructs the display unit 6 to alarm or display by a safety monitoring function, and thus the user may perform repairs or separately designated maintenance work.
  • the present invention is to control the flow rate of the coupler control valve and the uncoupling flow path and the coupling lock flow path while confirming the coupling or detachment of the option device in the construction process by attaching or replacing the option device using a quick coupler in the construction machine Very useful.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

L'invention concerne un dispositif de commande de déplacement d'équipement de construction comprenant une pompe pilote pour fournir une pression de signal pilote pour conversion de tiroir à un moyen d'actionnement de dispositif de travail des moyens de déplacement et dispositif de pédale de déplacement à gauche, et à un dispositif de pédale de déplacement à droite et un dispositif de pédale d'option, comprenant un commutateur de réglage de pédale ; un bloc soupape ayant une prise de pression de signal de pédale de déplacement à gauche, une prise de pression de signal de pédale de déplacement à droite, et une prise de pression de signal de déplacement neutre, et distribuant une pression de signal pilote générée lorsque les pédales sont actionnées ; et une soupape de sélection convertie électriquement lorsque le commutateur de réglage de pédale est actionné de manière à raccorder au moins une des prises de pression de signal de pédale de déplacement des dispositifs de pédale à la prise de pression de signal de déplacement neutre, le tiroir de déplacement neutre étant commandé par le dispositif de pédale de déplacement à gauche et le dispositif de pédale de déplacement à droite.
PCT/KR2013/012384 2013-12-30 2013-12-30 Dispositif de commande hydraulique et engin de construction qui en est équipé Ceased WO2015102120A1 (fr)

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KR20150117480A (ko) * 2014-04-10 2015-10-20 두산인프라코어 주식회사 굴삭기의 퀵 커플러 제어 방법 및 이를 수행하기 위한 장치
CN107269608A (zh) * 2017-07-25 2017-10-20 广州中船文冲船坞有限公司 Fpso船舶舵叶液压锁止系统
CN108884842A (zh) * 2016-03-31 2018-11-23 株式会社多田野 液压系统以及紧急情况操作方法
CN109681493A (zh) * 2018-12-29 2019-04-26 湖北航天技术研究院总体设计所 基于液控自锁的调平控制回路和控制方法
EP3546655A4 (fr) * 2017-02-28 2020-07-08 Komatsu Ltd. Circuit couplage rapide et procédé de fixation/détachement de couplage rapide
WO2020196956A1 (fr) * 2019-03-27 2020-10-01 Volvo Construction Equipment Ab Circuit de coupleur rapide d'un engin de chantier doté d'un système de mise sous pression automatique
US20230098551A1 (en) * 2020-03-16 2023-03-30 Komatsu Ltd. Hydraulic system for work machine, work machine, and method for controlling hydraulic system
EP4335975A1 (fr) * 2022-09-06 2024-03-13 Oilquick AB Système de sécurité pour machine
EP4382675A4 (fr) * 2022-03-31 2025-08-20 Hitachi Construction Machinery Tierra Co Ltd Engin de chantier

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Cited By (13)

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Publication number Priority date Publication date Assignee Title
KR102241176B1 (ko) 2014-04-10 2021-04-16 두산인프라코어 주식회사 굴삭기의 퀵 커플러 제어 방법 및 이를 수행하기 위한 장치
KR20150117480A (ko) * 2014-04-10 2015-10-20 두산인프라코어 주식회사 굴삭기의 퀵 커플러 제어 방법 및 이를 수행하기 위한 장치
CN108884842A (zh) * 2016-03-31 2018-11-23 株式会社多田野 液压系统以及紧急情况操作方法
EP3546655A4 (fr) * 2017-02-28 2020-07-08 Komatsu Ltd. Circuit couplage rapide et procédé de fixation/détachement de couplage rapide
US11105063B2 (en) 2017-02-28 2021-08-31 Komatsu Ltd. Quick coupler circuit and quick coupler attachment/detachment method
CN107269608A (zh) * 2017-07-25 2017-10-20 广州中船文冲船坞有限公司 Fpso船舶舵叶液压锁止系统
CN109681493A (zh) * 2018-12-29 2019-04-26 湖北航天技术研究院总体设计所 基于液控自锁的调平控制回路和控制方法
WO2020196956A1 (fr) * 2019-03-27 2020-10-01 Volvo Construction Equipment Ab Circuit de coupleur rapide d'un engin de chantier doté d'un système de mise sous pression automatique
US11598067B2 (en) 2019-03-27 2023-03-07 Volvo Construction Equipment Ab Quick coupler circuit of construction machine with automatic pressurization system
US20230098551A1 (en) * 2020-03-16 2023-03-30 Komatsu Ltd. Hydraulic system for work machine, work machine, and method for controlling hydraulic system
EP4105390A4 (fr) * 2020-03-16 2024-02-21 Komatsu Ltd. Système hydraulique pour engin de chantier et procédé de commande d'un tel système hydraulique
EP4382675A4 (fr) * 2022-03-31 2025-08-20 Hitachi Construction Machinery Tierra Co Ltd Engin de chantier
EP4335975A1 (fr) * 2022-09-06 2024-03-13 Oilquick AB Système de sécurité pour machine

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