WO2015102120A1 - Hydraulic control device and construction equipment having same - Google Patents

Hydraulic control device and construction equipment having same 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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WO
WIPO (PCT)
Prior art keywords
coupler
valve
hydraulic
passage
hydraulic pump
Prior art date
Application number
PCT/KR2013/012384
Other languages
French (fr)
Korean (ko)
Inventor
이승현
Original Assignee
볼보 컨스트럭션 이큅먼트 에이비
이승현
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.)
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Application filed by 볼보 컨스트럭션 이큅먼트 에이비, 이승현 filed Critical 볼보 컨스트럭션 이큅먼트 에이비
Priority to PCT/KR2013/012384 priority Critical patent/WO2015102120A1/en
Publication of WO2015102120A1 publication Critical patent/WO2015102120A1/en

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Classifications

    • 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

The disclosed invention relates to a construction equipment traveling control device including a pilot pump for supplying pilot signal pressure for spool conversion to a working device operating means and a left traveling pedal device, and to a right traveling pedal device and an option pedal device, comprising: a pedal adjustment switch; a valve block having a left traveling pedal signal pressure port, a right traveling pedal signal pressure port and a straight traveling signal pressure port, and distributing pilot signal pressure generated when operating the pedal devices; and a selection valve electrically converted when operating the pedal adjustment switch so as to connect at least one of the traveling pedal signal pressure port among the pedal devices to the straight traveling signal pressure port, wherein the straight traveling spool is controlled by the left traveling pedal device and the right traveling pedal device.

Description

유압제어장치 및 이를 구비한 건설기계Hydraulic control device and construction machine equipped with the same
본 발명은 유압제어장치 및 이를 구비한 건설기계에 관한 것으로, 건설기계에 장착되는 브레이커나 해머, 도저블레이드 등을 포함하는 작업장치를 퀵커플러에 의하여 장착 및 사용 시에 커플러의 잠금 상태 및 이탈 상태를 감시하고 제어할 수 있도록 개량된 유압제어장치 및 이를 구비한 건설기계에 관한 것이다.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.
굴삭기를 포함하는 건설기계는 건설현장에서 요구되는 작업에 맞도록 작업장치로써 아암의 선단부에 버켓이나 브레이커나 해머, 쉐어, 도저 블레이드 등을 포함하는 여러가지 옵션장치를 부착하여 사용한다. 통상적으로, 옵션장치는 퀵커플러에 의하여 장착되거나 교체될 수 있으며, 유압에 의하여 작동된다.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. Typically, the option device can be mounted or replaced by a quick coupler and is operated by hydraulic pressure.
하지만, 사용자가 옵션장치의 교체 및 작동 중에 퀵커플러의 연결 상태 및 커플러 실린더의 작동 상태를 육안으로 확인하기 곤란한 문제점이 있다.However, it is difficult for a user to visually check the connection state of the quick coupler and the operation state of the coupler cylinder during the replacement and operation of the option device.
퀵커플러에 관한 유압제어장치의 하나로써 한국특허 제2013-0062322호(2013년 06월 12일자공개)에 건설 기계의 퀵 커플러 유압회로가 공개되어 있다. 도 1은 종래의 퀵커플러를 개략적으로 도시한 것으로써, 통상적으로 퀵커플러는 후크 또는 커플러 투쓰(2)를 구비하며, 커플러 바디(1) 내부에 유압 실린더의 신장 및 수축에 의하여 상기 커플러 투쓰(2)가 옵션장치의 연결부를 고정하도록 구성되어 있다.As a hydraulic control device for a quick coupler, Korean Patent No. 2013-0062322 (published on June 12, 2013) 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.
전술한 퀵 커플러 유압회로는, 작업장치의 교환 시에 잠금 포지션과 해제 포지션 사이에서 항상 유압 펌프가 승압되어야 하고, 그러한 유압펌프의 승압 동안에 작업용 액츄에이터, 예를 들면 붐 실린더나 아암 실린더 및 선회모터의 움직임이 불안정해지며, 그에 따라서 연비가 악화되는 문제점을 해결하기 위하여, 유압펌프의 승압 시간이나 타이밍을 제어하고자 하였다.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.
하지만, 전술한 선행기술 역시 퀵커플러의 잠금 상태 및 해제 상태를 운전실 내에 있는 사용자가 육안으로 확인하거나 인지할 수 없으며, 퀵커플러로부터 작업장치 또는 옵션장치가 이탈되거나 안전 상태인지 여부를 사용자가 직접적으로 판단 및 제어할 수 없는 문제점이 있다.However, 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.
본 발명은 전술한 문제점을 해결하기 위하여 창출된 것으로,The present invention was created to solve the above problems,
사용자가 운전실에 내에서 퀵 커플러의 장착 상태를 확인할 수 있는 편의성을 제공하고, 건설기계의 굴삭 및 평탄 작업 또는 파쇄 작업 중에 옵션장치가 퀵 커플러로부터 이탈되거나 비정상적으로 탈착될 수 있는 정보를 사용자에게 표시할 수 있는 유압제어장치 및 이를 구비한 건설기계를 제공하는데 목적이 있다.Provides the user with the convenience of checking the installation status of the quick coupler in the cab and displays the information to the user that the optional device may be detached from the quick coupler or abnormally detached during the excavation, flattening or shredding of construction machinery. An object of the present invention is to provide a hydraulic control device and a construction machine having the same.
전술한 목적을 달성하기 위하여, 본 발명의 한 특징은,In order to achieve the above object, one feature of the present invention,
엔진;engine;
상기 엔진에 연결된 가변용량형 유압펌프와 고정형 유압펌프;A variable displacement hydraulic pump and a fixed hydraulic pump connected to the engine;
붐이나 아암을 포함하는 작업장치의 구동을 위한 유압 액츄에이터;A hydraulic actuator for driving a work tool including a boom or an arm;
상기 가변용량형 유압펌프와 상기 유압 액츄에이터 사이의 메인유로에 설치되며, 상기 작업장치의 기동, 정지 및 방향전환을 위하여 상기 가변용량형 유압펌프로부터 토출되는 작동유를 제어하는 메인제어밸브;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;
커플러 실린더와 상기 커플러 실린더에 연결되는 커플링 해제유로 및 커플링 잠금유로를 구비하며, 옵션장치의 부착 또는 조립시에는 상기 고정형 유압펌프로부터 공급되는 작동유에 의해 잠금포지션으로 작동하고, 상기 옵션장치의 탈착 또는 분해시에는 상기 가변용량형 유압펌프로부터 공급되는 작동유에 의해 해제포지션으로 작동하는 퀵커플러 밸브블록;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;
커플러 기능 스위치의 해제 조작시에 전환되어, 상기 가변용량형 유압펌프로부터 상기 커플링 해제유로를 통하여 상기 커플러 실린더에 공급되는 작동유의 흐름과 상기 커플링 잠금유로를 통하여 유압탱크에 배출되는 작동유의 흐름을 제어하는 커플러 제어밸브;The flow of hydraulic oil which is switched at the time of release operation of the coupler function switch and is supplied to the coupler cylinder from the variable displacement hydraulic pump through the coupling release flow passage and the hydraulic oil discharged to the hydraulic tank through the coupling lock flow passage. Coupler control valve for controlling the;
상기 퀵커플러 밸브블록과 상기 가변용량형 유압펌프 사이에 설치되며, 상기 커플링 해제유로를 통하여 공급되는 파일럿 신호압력에 의해 절환 시에 상기 메인유로를 상기 커플러 제어밸브에 연결하는 파일럿 방향절환밸브; 및A 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; And
상기 커플러 기능 스위치의 조작에 상응하여 선택적으로 상기 커플러 제어밸브의 전환 작동을 위한 제어신호를 출력하며, 상기 커플링 해제유로 및 커플링 잠금유로 각각의 압력 변화에 의존하여 상기 옵션장치의 부착 또는 조립의 초기에는 안전확인 기능을 제공하고 상기 옵션장치의 작동 중에는 안전모니터링 기능을 제공하는 컨트롤러를 포함하는 유압제어장치를 제공함으로써 달성된다.Selectively outputs a control signal for switching operation of the coupler control valve in response to the operation of the coupler function switch, and attaching or assembling the option device depending on the pressure change of the coupling release passage and the coupling lock passage This is achieved by providing 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.
본 발명에 따르면, 옵션장치를 부착하거나 교체 혹은 조립하는 초기에 상기 안전확인 기능에 따라서 커플러 결합 및 고정 상태를 사용자가 용이하게 파악할 수 있으며, 안전모니터링 기능에 의하여 건설현장에서 옵션장치를 이용하여 작업대상을 파쇄하거나 평탄 작업을 수행하는 과정에서 옵션장치가 퀵커플러로부터 이탈되거나 탈착 혹은 분리되는 것을 방지한다.According to the present invention, at the initial stage of attaching, replacing or assembling the optional 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.
본 발명에 따른 유압제어장치는, 상기 커플러 제어밸브와 상기 고정형 유압펌프 사이에 연결되는 유압라인에 안전밸브가 구성되며, 상기 안전밸브는 상기 컨트롤러로부터 제공되는 밸브제어신호에 상응하여 개방 및 폐쇄위치로 전환되도록 제어된다.In the hydraulic control apparatus according to the present invention, 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.
또한, 본 발명에 따른 유압제어장치는, 상기 커플러 제어밸브의 하류측에 형성되는 상기 커플링 해제유로 및 상기 커플링 잠금유로 각각에 압력센서가 설치되며, 상기 압력센서들은 상기 커플링 해제유로 및 상기 커플링 잠금유로에 형성되는 유압의 변화에 상응하여 소정의 전류변화 신호를 상기 컨트롤러에 제공한다.In addition, in the hydraulic control apparatus according to the present invention, 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.
본 발명에 따르면, 굴삭 및 상차 혹은 평탄 작업 중에 옵션장치가 퀵 커플러에 조립 및 장착될 경우, 커플러 제어밸브를 통하여 퀵 커플러용 유압실린더에 공급되는 유압의 변화 및 압력센서의 전류변화에 의존하여 안전 상태를 확인하여 사용자에게 표시한다.According to the present invention, when the optional device is assembled and mounted on the quick coupler during excavation, loading or flattening operation, 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.
보다 구체적으로, 본 발명에 따른 컨트롤러가 상기 커플링 해제유로에 설치된 압력센서의 압력변화에 의존하여 안전확인 기능을 수행하며, 미리 설정된 알고리즘에 따라서 결정되는 안전 또는 이상 상태의 정보를 디스플레이 유닛에 출력한다.More specifically, the controller according to the present invention 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.
또한, 본 발명에 따른 컨트롤러는 상기 커플링 잠금유로에 설치된 압력센서의 압력변화에 의존하여 안전모니터링 기능을 수행하며, 미리 설정된 알고리즘에 따라서 결정되는 안전 또는 이상 상태의 정보를 디스플레이 유닛에 출력한다.In addition, the controller according to the present invention 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.
본 발명에 따른 유압제어장치는, 상기 커플러 제어밸브와 상기 고정형 유압펌프 사이에 연결되는 유압라인에 셔틀밸브가 구성되며, 상기 셔틀밸브는 커플러 기능 스위치의 해제 조작시에 상기 파일럿 방향절환밸브를 통하여 도입되는 고압의 작동유를 상기 커플러 제어밸브에 제공한다.In the hydraulic control apparatus according to the present invention, 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.
한편, 본 발명의 다른 특징은, On the other hand, another feature of the present invention,
건설현장에서 지면을 따라 이동하는 하부주행체; 상기 하부주행체 상부에 회전 가능하게 탑재되는 상부프레임; A lower traveling body moving along the ground at the construction site; An upper frame rotatably mounted on the lower running body;
상기 상부프레임 일측에 설치되며, 내부에 안전스위치를 포함하는 다수의 작업장치용 조작수단이 구비된 운전실; 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;
엔진; engine;
상기 엔진에 연결된 가변용량형 유압펌프와 고정형 유압펌프; A variable displacement hydraulic pump and a fixed hydraulic pump connected to the engine;
붐이나 아암을 포함하는 작업장치의 구동을 위한 적어도 하나 이상의 유압 액츄에이터; 상기 가변용량형 유압펌프와 상기 유압 액츄에이터 사이에 설치되며, 상기 작업장치의 기동, 정지 및 방향전환을 위하여 상기 가변용량형 유압펌프로부터 토출되는 작동유를 제어하는 메인제어밸브; 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;
커플러 실린더와 상기 커플러 실린더에 연결되는 커플링 해제유로 및 커플링 잠금유로를 구비하며, 옵션장치의 부착 또는 조립시에는 상기 고정형 유압펌프로부터 공급되는 작동유에 의해 잠금포지션으로 작동하고, 상기 옵션장치의 탈착 또는 분해시에는 상기 가변용량형 유압펌프로부터 공급되는 작동유에 의해 해제포지션으로 작동하는 퀵커플러 밸브블록; 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;
커플러 기능 스위치의 해제 조작시에 전환되어, 상기 가변용량형 유압펌프로부터 상기 커플링 해제유로를 통하여 상기 커플러 실린더에 공급되는 작동유의 흐름과 상기 커플링 잠금유로를 통하여 유압탱크에 배출되는 작동유의 흐름을 제어하는 커플러 제어밸브; The flow of hydraulic oil which is switched at the time of release operation of the coupler function switch and is supplied to the coupler cylinder from the variable displacement hydraulic pump through the coupling release flow passage and the hydraulic oil discharged to the hydraulic tank through the coupling lock flow passage. Coupler control valve for controlling the;
상기 퀵커플러 밸브블록과 상기 가변용량형 유압펌프 사이에 설치되며, 상기 커플링 해제유로를 통하여 공급되는 파일럿 신호압력에 의해 절환 시에 상기 메인유로를 상기 커플러 제어밸브에 연결하는 파일럿 방향절환밸브; 및 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; And
상기 커플러 기능 스위치의 조작에 상응하여 선택적으로 상기 커플러 제어밸브의 전환 작동을 위한 제어신호를 출력하며, 상기 커플링 해제유로 및 커플링 잠금유로 각각의 압력 변화에 의존하여 상기 옵션장치의 부착 또는 조립의 초기에는 안전확인 기능을 제공하고 상기 옵션장치의 작동 중에는 안전모니터링 기능을 제공하는 컨트롤러를 포함하여 구성되는 건설기계를 제공함에 의해 달성된다.Selectively outputs a control signal for switching operation of the coupler control valve in response to the operation of the coupler function switch, and attaching or assembling the option device depending on the pressure change of the coupling release passage and the coupling lock passage This is achieved by providing 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.
본 발명에 따른 유압제어장치는, 퀵커플러에 의해 옵션장치를 건설기계에 부착 및 조립하여 굴삭 작업이나 평탄 작업 또는 파쇄 작업을 수행하는 경우, 커플러 제어밸브를 통하여 커플러 실린더에 공급되는 유압의 변화 및 압력센서의 전류변화에 의존하여 안전 상태를 확인 및 제어할 수 있고, 그 결과를 사용자에게 표시 및 경보로 제공하도록 함으로써 퀵커플러 및 옵션장치를 안정적으로 운영할 수 있는 장점이 있다.The hydraulic control device according to the present invention, 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.
또한, 본 발명에 따른 유압제어장치 및 이를 구비한 건설기계는, 건설작업 중에 퀵 커플러로부터 옵션장치가 비정상적으로 탈착되거나 이탈되는 사고를 미연에 방지할 수 있는 장점이 있다.In addition, 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.
도 1은 종래의 퀵 커플러를 개략적으로 도시한 측면도,1 is a side view schematically showing a conventional quick coupler;
도 2는 본 발명의 일실시예에 따른 유압제어장치를 도시한 유압회로도,2 is a hydraulic circuit diagram showing a hydraulic control apparatus according to an embodiment of the present invention;
도 3은 본 발명의 일실시예에 따라 건설작업 중에 퀵커플러 밸브와 커플러 제어밸브 관하여 안전모니터링 기능이 수행되는 과정을 개략적으로 도시한 플로우 챠트,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;
도 4는 본 발명의 일실시예에 따라 안전확인 기능 및 안전모니터링 기능 수행시에 퀵커플러 밸브블록 내의 압력의 변화를 설명하는 그래프,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;
도 5는 본 발명의 일실시예에 따라 퀵커플러 밸브블록과 커플러 제어밸브 사이의 압력 변화에 대한 전류변화를 설명하는 그래프,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;
도 6은 본 발명의 일실시예에 따라 유압제어장치가 설비된 굴삭기를 도시한 개략도,Figure 6 is a schematic diagram showing an excavator equipped with a hydraulic control device according to an embodiment of the present invention,
본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정해서 해석되어서는 아니 되며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적법하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야 한다. The terms or words used in this specification and claims are not to be construed as being limited to their ordinary or dictionary meanings, and the inventors may legally define the concept of terms in order to best describe their invention. On the basis of the principle that the present invention should be interpreted as meanings and concepts corresponding to the technical idea of the present invention.
이하 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명의 일실시예에 의한 유압제어장치는 퀵커플러 바디(40) 내에 설치되는 퀵커플러 밸브블록(20)과 커플러 제어밸브(15) 사이에서 커플링 해제유로(22)의 압력변화 또는 커플링 잠금유로(23)의 압력변화에 의존하여 옵션장치의 이탈을 방지하는데 유용하다.In the hydraulic control apparatus 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. It is useful to prevent the release of the option device depending on the pressure change of the locking passage 23.
보다 구체적으로, 도 2 내지 도 6을 참조하면, 일실시예에 따른 유압제어장치는 엔진(E)과 상기 엔진(E)에 연결된 가변용량형 유압펌프(P1)와 고정형 유압펌프(3)를 포함하여 구성된다. 상기 가변용량형 유압펌프(P1)는, 붐(65)이나 아암(66)을 포함하는 작업장치의 구동을 위한 유압 액츄에이터, 예를 들면, 붐실린더(68)와 아암실린더(69) 뿐만 아니라 옵션장치(67)에 유압을 제공한다. More specifically, referring to FIGS. 2 to 6, a hydraulic control apparatus according to an embodiment 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. Provide hydraulic pressure to the device 67.
상기 아암(66)의 일측에는 전술한 버켓 실린더 대신에 브레이커나 해머 및 도저 블레이드를 포함하는 옵션장치(67)를 구동하기 위한 유압실린더(60)가 장착되며, 상기 아암(66)의 선단부에 퀵커플러 바디(40)가 결합된다.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.
상기 퀵커플러 바디(40)는 종래와 동일한 구조의 후크 또는 투스(2)를 구비하며, 상기 퀵커플러 바디(40) 내부에 구성된 퀵커플러 밸브블록(20)에 형성되는 유압에 의하여 상기 옵션장치(67)와 커플링 결합으로 고정된다. 상기 퀵커플러 밸브블록(20)은 후술한다.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.
본 발명에 의한 유압제어장치는, 상기 가변용량형 유압펌프(P1)와 상기 유압 액츄에이터 사이의 메인유로(11)에 설치되며, 상기 작업장치의 기동, 정지 및 방향전환을 위하여 상기 가변용량형 유압펌프(P1)로부터 토출되는 작동유를 제어하는 메인제어밸브(32)를 포함하여 구성된다. 상기 메인제어밸브(32)는 붐(65)이나 아암(66) 및 옵션장치(67)의 구동을 위한 다수의 작업장치용 스풀(12a, 12b)을 내부에 구성하고 있다.The hydraulic control apparatus according to the present invention 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.
본 발명에 의한 퀵커플러 밸브블록(20)은, 커플러 실린더(21)와 상기 커플러 실린더(21)에 연결되는 커플링 해제유로(22) 및 커플링 잠금유로(23)를 구비하며, 옵션장치(67)의 부착 또는 조립시에는 상기 고정형 유압펌프(3)로부터 공급되는 작동유에 의해 잠금포지션으로 작동하고, 상기 옵션장치(67)의 탈착 또는 분해시에는 상기 가변용량형 유압펌프(P1)로부터 공급되는 작동유에 의해 해제포지션으로 작동한다. 상기 커플링 해제유로(22) 상에는 커플러 해제조작시 안전을 위한 파이럿 체크밸브(19)가 더 설치될 수 있다.The quick coupler valve block 20 according to the present invention 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.
본 발명에 관한 설명에 있어서, 해제는 퀵 커플러의 탈착을 위하여 상기 커플러 실린더(21)의 튜브 내측으로 피스톤이 수축되거나 혹은 그를 위한 밸브전환 상태를 의미하며, 잠금은 상기 커플러 실린더(21)의 튜브 외측으로 피스톤이 신장되거나 혹은 그를 위한 밸브전환 상태를 설명하는 것으로 해석될 수 있다.In the description of the present invention, 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.
본 발명에 따른 커플러 제어밸브(15)는, 제어라인(28)을 통하여 밸브전환신호를 인가받는 솔레노이드부를 구비하며, 상기 커플링 해제유로(22) 및 커플링 잠금유로(23)에 연결되도록 구성된다. The coupler control valve 15 according to the present invention 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.
바람직하게는, 상기 커플러 제어밸브(15)는 커플러 기능 스위치(24)의 해제 조작시에 전환되어, 상기 가변용량형 유압펌프(P1)로부터 상기 커플링 해제유로(22)를 통하여 상기 커플러 실린더(21)에 공급되는 작동유의 흐름과 상기 커플링 잠금유로(23)를 통하여 유압탱크(T)에 배출되는 작동유의 흐름을 제어한다.Preferably, 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.
본 발명에 따른 파일럿 방향절환밸브(16)는, 상기 퀵커플러 밸브블록(20)과 상기 가변용량형 유압펌프(P1) 사이에 설치되며, 상기 커플링 해제유로(22)를 통하여 공급되는 파일럿 신호압력에 의해 절환 시에 상기 메인유로(11)를 상기 커플러 제어밸브(15)에 연결한다. 상기 파일럿 방향절환밸브(16)는 스풀절환시에 상기 커플러 제어밸브(15)에 상기 가변용량형 유압펌프(P1)로부터 토출되는 유압을 제공하기 위하여 상기 메인유로(11)와 연결되는 내부유로(16a)를 구비한다.Pilot directional control valve 16 according to the present invention, 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).
본 발명에 의한 컨트롤러(5)는, 상기 커플러 기능 스위치(24)의 조작에 상응하여 선택적으로 상기 커플러 제어밸브(15)의 전환 작동을 위한 제어신호를 출력하며, 상기 커플링 해제유로(22) 및 커플링 잠금유로(23) 각각의 압력 변화에 의존하여 상기 옵션장치(67)의 부착 또는 조립이나 교체의 초기에 안전확인 기능을 제공하고 상기 옵션장치(67)의 작동 중에는 안전모니터링 기능을 제공한다.The controller 5 according to the present invention 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.
본 발명에 따른 유압제어장치는, 상기 커플러 제어밸브(15)의 하류측에 형성되는 상기 커플링 해제유로(22) 및 상기 커플링 잠금유로(23) 각각에 압력센서(29, 30)가 설치되며, 상기 압력센서(29, 30)들은 상기 커플링 해제유로(22) 및 상기 커플링 잠금유로(23) 내에 형성되는 유압의 변화에 상응하여 소정의 전류변화 신호를 상기 컨트롤러(5)에 제공한다.In the hydraulic control apparatus according to the present invention, 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.
본 발명에 따르면, 굴삭 작업이나 평탄 작업 혹은 파쇄 작업 도중에 옵션장치(67)가 퀵커플러 바디(40)에 조립 및 장착될 경우, 커플러 제어밸브(15)를 통하여 커플러 실린더(21)에 공급되는 유압의 변화 및 압력센서(29, 30)의 전류변화에 의존하여 안전 상태를 확인하여 사용자에게 표시 또는 경보를 제공한다.According to the present invention, 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.
보다 구체적으로, 본 발명에 따른 컨트롤러(5)가 상기 커플링 해제유로(22)에 설치된 압력센서(29)의 압력변화에 의존하여 안전확인 기능을 수행하며, 미리 설정된 알고리즘에 따라서 결정되는 안전 또는 이상 상태의 정보를 디스플레이 유닛(6)에 출력한다. 상기 디스플레이 유닛(6)은 사용자에게 안전 상태 또는 기능 작동 상태를 인식하도록 하기 위한 이미지나 기호 또는 문자를 출력할 수 있다.More specifically, the controller 5 according to the present invention 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.
전술한 안전확인 기능은 상기 옵션장치(67)가 퀵커플러 바디(40)에 조립 및 장착되는 초기에 수행되는 것이 바람직하다.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.
전술한 안전확인 기능뿐만 아니라 후술하는 안전모니터링 기능은, 상기 옵션장치(67)가 건설현장에서 사용되는 도중에, 상기 커플링 해제유로(22) 및 커플링 잠금유로(23) 각각의 압력 변화에 의존하여 사용자에게 커플러 실린더(21)의 유압 상태에 관한 정보를 운전실(61)에 있는 사용자에게 제공하는 일련의 프로세스를 포함한다.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.
보다 구체적으로, 도 3에 도시된 바와 같이, 상기 안전모니터링 기능은 상기 옵션장치(67)가 조립 및 장착된 이후에 옵션장치(67)를 이용하여 건설작업을 진행하는 과정에서 수행되는 것이 바람직하다.More specifically, as shown in FIG. 3, 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. .
본 발명에 의한 안전모니터링 기능은, 상기 압력센서(29)로부터 상기 커플링 해제유로(22)의 압력변화를 감지하여 상기 컨트롤러(5)로 전송하는 단계와 상기 압력변화의 출력값을 미리 설정된 범위와 비교 및 판단하는 단계 및 상기 단계에서 압력변화의 출력값이 미리 설정된 범위에 포함될 경우, 상기 디스플레이 유닛(6)을 통하여 커플러 잠금 상태로 지시하고, 상기 단계에서 압력변화의 출력값이 미리 설정된 범위에 포함되지 않을 경우에는, 상기 커플러 제어밸브(15)의 밸브 개구도를 조절하고 이어서 미리 설정된 타임 딜레이 이후에 상기 압력센서(29)의 압력변화를 다시 감지하도록 제어하는 단계를 포함하여 구성된다.The safety monitoring function according to the present invention 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. When the output value of the pressure change is included in the preset range in the comparing and judging step and the step, 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.
상기 커플링 해제유로(22)의 압력변화에 의존하는 안전모니터링 기능은, 상기 컨트롤러(5) 내에 미리 설정된 알고리즘에 따라서 판단 및 결정되는 안전 또는 이상 상태가 사용자에게 알람 정보 또는 표시 정보로써 디스플레이 유닛(6)에 출력될 수 있다.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.
본 발명에 따르면, 전술한 안전모니터링 기능이 상기 커플링 잠금유로(23)의 압력변화에 의존하여 수행될 수 있다.According to the present invention, the above-described safety monitoring function may be performed depending on the pressure change of the coupling lock passage 23.
예를 들면, 상기 커플링 잠금유로(23)의 압력변화에 관한 안전모니터링 기능은, 상기 압력센서(30)으로부터 상기 커플링 잠금유로(23)의 압력변화를 감지하여 상기 컨트롤러(5)로 전송하는 단계와 상기 압력변화의 출력값을 미리 설정된 범위와 비교 및 판단하는 단계 및 상기 단계에서 압력변화의 출력값이 미리 설정된 범위에 포함될 경우, 상기 디스플레이 유닛(6)을 통하여 커플러 잠금 상태로 지시한다.For example, 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.
또한, 상기 안전모니터링 기능은 상기 단계에서 압력변화의 출력값이 미리 설정된 범위에 포함되지 않을 경우, 상기 커플러 제어밸브(15)의 밸브 개구도가 상기 컨트롤러(5)에 의한 제어신호에 조절되며, 이어서 미리 설정된 타임 딜레이 이후에 상기 압력센서(30)의 압력변화를 다시 감지하도록 단계별로 진행된다.In addition, 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.
전술한, 안전모니터링 기능은 상기 퀵커플러 밸브블록(20)과 상기 커플러 제어밸브(15) 사이에 구성되는 유로의 압력변화에 응답하는 것이며, 커플링 해제유로(22)와 커플링 잠금유로(23)에서 동시에 변화하는 경우에도 적용된다.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).
한편, 본 발명에 따른 유압제어장치는, 상기 커플러 제어밸브(15)와 상기 고정형 유압펌프(3) 사이에 연결되는 유압라인(10)에 안전밸브(4)가 구성되며, 상기 안전밸브(4)는 상기 컨트롤러로(5)부터 제공되는 밸브제어신호에 상응하여 개방 및 폐쇄위치로 전환되도록 제어된다. 상기 안전밸브(4)는 전기적으로 연결되는 제어라인(27)을 통하여 상기 컨트롤러(5)로부터 밸브의 개구도 또는 밸브포트 전환에 관한 제어신호를 인가받는 솔레노이드 밸브로 구성할 수 있다.On the other hand, the hydraulic control device according to the present invention, 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.
상기 안전밸브(4)는 상기 커플러 기능스위치(24)의 조작여부와 무관하게 제어될 수 있는 바, 사용자에 의한 안전스위치(8)의 조작에 의존하여 상기 커플러 기능스위치(24)의 조작여부와 상관없이 상기 공급라인(10)을 통하여 제공되는 상기 고정형 유압펌프(3)의 유량을 제어할 수 있다. 상기 안전밸브(4)는 상기 커플러 기능스위치(24)와 상기 안전스위치(8)의 조작에 의존하여 상기 공급라인(10) 혹은 상기 커플러 실린더(21)에 제공되는 상기 고정형 유압펌프(3)의 유량을 제어할 수 있다.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.
상기 커플러 제어밸브(15)와 상기 고정형 유압펌프(3) 사이에 연결되는 유압라인에는 셔틀밸브(18)가 더 구성되며, 상기 셔틀밸브(18)는 상기 커플러 기능 스위치(24)의 해제 조작시에 상기 파일럿 방향절환밸브(16)를 통하여 도입되는 고압의 작동유를 선택하여 상기 커플러 제어밸브(15)에 제공한다.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.
여기서, 상기 파일럿 방향절환밸브(16)를 통하여 상기 커플러 제어밸브(15)에 공급되는 유량은 상기 가변용량형 유압펌프(P1)로부터 토출되는 유압에 의해 결정될 수 있다. 상기 셔틀밸브(18)와 상기 안전밸브(4) 사이에 연결되는 고정형 유압펌프(3)의 작동유 공급라인(10)에 역류방지 체크밸브(17)가 더 설치될 수 있다.Here, 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.
한편, 본 발명에 따르면 전술한 유압제어장치가 건설기계에 적용된다.Meanwhile, according to the present invention, the above-described hydraulic control device is applied to a construction machine.
도 2 및 도 6을 참조하면, 본 발명에 따른 건설기계는, 건설현장에서 지면을 따라 이동하는 하부주행체(62)와, 상기 하부주행체 상부에 회전 가능하게 탑재되는 상부프레임(63), 상기 상부프레임(62) 일측에 설치되며, 내부에 안전스위치(8)를 포함하는 다수의 작업장치용 조작수단(9)이 구비된 운전실(61), 엔진룸(64) 내부에 장착되는 엔진(E), 상기 엔진(E)에 연결된 가변용량형 유압펌프(P1)와 고정형 유압펌프(3), 붐(65)이나 아암(66)을 포함하는 작업장치의 구동을 위한 적어도 하나 이상의 유압 액츄에이터(13), 상기 가변용량형 유압펌프(P1)와 상기 유압 액츄에이터(13) 사이에 설치되며 상기 작업장치의 기동, 정지 및 방향전환을 위하여 상기 가변용량형 유압펌프(P1)로부터 토출되는 작동유를 제어하는 메인제어밸브(32)를 포함하여 구성된다.2 and 6, 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.
또한, 본 발명에 따른 건설기계는, 커플러 실린더(21)와 상기 커플러 실린더(21)에 연결되는 커플링 해제유로(22) 및 커플링 잠금유로(23)를 구비하며 옵션장치(67)의 부착 또는 조립시에는 상기 고정형 유압펌프(3)로부터 공급되는 작동유에 의해 잠금포지션으로 작동하고 상기 옵션장치(67)의 탈착 또는 분해시에는 상기 가변용량형 유압펌프(P1)로부터 공급되는 작동유에 의해 해제포지션으로 작동하는 퀵커플러 밸브블록(20)과, 커플러 기능 스위치(24)의 해제 조작시에 전환되어 상기 가변용량형 유압펌프로(P1)부터 상기 커플링 해제유로(22)를 통하여 상기 커플러 실린더(21)에 공급되는 작동유의 흐름과 상기 커플링 잠금유로를 통하여 유압탱크(T)에 배출되는 작동유의 흐름을 제어하는 커플러 제어밸브(15), 상기 퀵커플러 밸브블록(20)과 상기 가변용량형 유압펌프(P1) 사이에 설치되며 상기 커플링 해제유로(22)를 통하여 공급되는 파일럿 신호압력에 의해 절환 시에 상기 메인유로(11)를 상기 커플러 제어밸브(15)에 연결하는 파일럿 방향절환밸브(16) 및 상기 커플러 기능 스위치(24)의 조작에 상응하여 선택적으로 상기 커플러 제어밸브(15)의 전환 작동을 위한 제어신호를 출력하며 상기 커플링 해제유로(22) 및 커플링 잠금유로(23) 각각의 압력 변화에 의존하여 상기 옵션장치(67)의 부착 또는 조립의 초기에는 안전확인 기능을 제공하고 상기 옵션장치(67)의 작동 중에는 안전모니터링 기능을 제공하는 컨트롤러(5)를 포함하여 구성된다.In addition, 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. Alternatively, 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. Coupler control valve 15, the quick coupler valve block 20 and the variable capacity to control the flow of the working oil supplied to the 21 and the flow of the working oil discharged to the hydraulic tank (T) through the coupling lock flow path Brother A pilot direction switching valve installed between the pressure pumps P1 and connecting the main flow passage 11 to the coupler control valve 15 at the time of switching by the pilot signal pressure supplied through the decoupling passage 22. (16) and a control signal for selectively switching the operation of the coupler control valve 15 corresponding to the operation of the coupler function switch 24, and the coupling release passage 22 and the coupling lock passage 23 A controller 5 which provides a safety confirmation function at the beginning of the attachment or assembly of the option device 67 depending on each pressure change and provides a safety monitoring function during operation of the option device 67. do.
본 발명에 의한 건설기계가 굴삭기로 적용될 경우, 통상적으로 상기 상부프레임(3) 상에 상기 붐(5)이 피봇가능하게 장착되며, 붐실린더(65)의 신장 및 수축 구동에 의해 건설기계의 상하 방향으로 작동된다. 또한, 아암(66)은 상기 붐(65)의 선단부에서 피봇 가능하게 연결되어 아암실린더(69)의 신장 및 수축 구동에 의해 건설기계의 전후 방향으로 움직이며, 옵션장치(67)는 상기 아암(6)의 선단부에 퀵커플러 바디(40)에 의해 연결 및 고정된다.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. In addition, 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).
상기 메인컨트롤밸브(32)는 전술한 바와 같이 작업장치로써 브레이커나 해머를 포함하는 옵션장치용 스풀(12a)을 포함하며, 종래의 건설기계에 잘 알려진 프론트 작업장치로써 붐(65)이나 아암(66) 등 여러가지 작업장치용 밸브스풀(12b)을 포함하여 구성할 수 있음은 당업자에게 자명하게 해석될 것이다. As described above, 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.
본 발명에 의한 유압제어장치의 작동원리를 설명한다.The operation principle of the hydraulic control apparatus according to the present invention will be described.
본 발명에 의한 유압제어장치 및 이를 구비한 건설기계는, 운전실(61)에서 사용자가 옵션장치(67)를 포함하는 작업장치 혹은 프론트 작업장치를 교체하기 위하여 상기 커플러 기능 스위치(24)를 해제 상태로 조작하면, 소정의 제어신호가 제어라인(25)을 통하여 상기 컨트롤러(5)로 입력되고, 상기 컨트롤러(5)는 제어라인(28)을 통하여 상기 커플러 제어밸브(15)에 밸브전환신호로 출력한다. In the hydraulic control device and the construction machine having the same according to the present invention, 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. In this case, 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. Output
도 2를 참조하면, 상기 밸브전환신호에 의존하여 상기 커플러 제어밸브(15)는 도면상 좌측으로 절환된다. 이때, 상기 고정형 유압펌프(3)로부터 연결되는 공급라인(10)으로부터 토출되어 대기중인 유압이 상기 커플러 제어밸브(15)를 거쳐 일부는 상기 파일럿 방향 절환 밸브(16)에 방향 절환 신호를 보내고 일부는 상기 커플링 해제유로(22)를 통하여 상기 퀵커플러 밸브블록(20)의 커플러 실린더(21)에 필요한 유압으로 공급된다.Referring to FIG. 2, 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.
이와 동시에, 상기 파일럿 방향절환밸브(16)를 통하여 상기 가변용량형 유압펌프(P1)의 메인유로(11)를 통하여 제공되는 고압의 작도유가 커플링 해제유로(22)를 통하여 퀵커플러 밸브블록(20)에 설치된 커플러 실린더(31)에 공급됨에 의하여 옵션장치(67)를 퀵커플러 바디(40)로부터 해제할 수 있게 된다. 이 과정에서, 상기 커플러 실린더(21)를 잠금상태로 유지하던 유압은 상기 커플링 잠금유로(23)와 상기 커플러 제어밸브(15) 및 복귀라인(14)를 통하여 유압탱크(T)로 귀환된다.At the same time, 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. .
한편, 상기 옵션장치(67)의 교체가 완료된 경우, 사용자는 상기 커플러 기능스위치(24)를 역으로 조작하며, 상기 커플러 제어밸브(15)는 도면상 우측으로 전환된다. 이때, 상기 공급라인(10)을 통해 제공되는 유압이 커플링 잠금유로(23) 및 파일럿 체크밸브(19)를 통하여 커플러 실린더(21)에 공급되어 상기 커플러 실린더(21)는 잠금상태를 유지한다.On the other hand, when the replacement of the option device 67 is completed, the user operates the coupler function switch 24 in reverse, and the coupler control valve 15 is switched to the right in the drawing. At this time, the hydraulic pressure provided through the supply line 10 is supplied to the coupler cylinder 21 through the coupling lock passage 23 and the pilot check valve 19 to maintain the coupler cylinder 21 in a locked state. .
상기 커플링 해제유로(22)의 유압 또는 작동유는 상기 전환된 커플러 제어밸브(15)와 상기 복귀라인(14)을 통하여 유압탱크(T)로 복귀된다.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.
전술한 바와 같이 본 발명에 따른 유압제어장치는 커플링 잠금유로 및 커플링 해제유로의 압력변화에 의존하여 작동하며, 도 4에 도시된 바와 같이 커플러 잠금 및 해제 상태에 따라서 압력이 변화한다. 여기서, A 구간은 퀵커플러가 잠금 상태를 유지하는 것을 지시하는 것이며, B 구간은 퀵커플러가 해제 동작 중인 상태, C 구간은 퀵커플러가 잠금 동작 중인 상태, D 구간은 퀵커플러가 잠금 동작 이후 릴리프 중인 상태를 지시하는 것이다. 상기 D 구간 이후에 퀵커플러의 작동에 변화가 없으면, 상기 커플러 잠금유로(23)의 압력은 일정 시간을 두고 구간 “A”상태의 압력으로 안정화 방향으로 수렴된다.As described above, the hydraulic control apparatus according to the present invention 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. Here, 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, and 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.
한편, 도 5에 도시된 바와 같이, 상기 커플링 해제유로(22) 및 커플링 잠금유로(23) 상에 장착된 압력센서(29, 30)에서 감지 및 출력은 상기 컨트롤러(4)를 통하여 비교 및 판단된다. 예를 들면, 상기 압력 센서(29, 30)는 측정된 압력값이 증가할수록 출력값인 전류 값이 높아지는 선형적인 직선 값으로 출력될 수 있으며, 압력 센서 측정구간 E는 압력 공차를 포함한 해제 압력 구간의 범위로 결정될 수 있다.On the other hand, as shown in Figure 5, 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. For example, 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.
예를 들면, 상기 커플링 해제유로(22)의 압력센서(29)로부터 소정의 출력값이 구간 E에 해당하는 전류값으로 상기 컨트롤러(5)로 입력되면, 상기 컨트롤러(5)는 퀵커플러의 조립 및 장착이 정상적으로 유지되어 안전한 상태로 판단하여 상기 디스플레이 유닛(6)을 통하여 사용자에게 안전 상태의 정보를 제공한다. 반면에, 건설작업 과정에서 상기 커플링 잠금유로(23)의 압력센서(30)로부터 출력되는 전류가 구간 F의 값에 해당하면 퀵커플러의 결합 및 고정이 느슨해지거나 이탈되고 있어서 상기 컨트롤러(5)는 이상 상태로 판단하여 상기 커플러 제어밸브(15)의 개구도를 조절한다.For example, 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.
이 과정에서, 상기 컨트롤러(5)는 안전모니터링 기능에 의하여 상기 디스플레이 유닛(6)에 경보나 표시를 지시하며, 그에 따라서 사용자는 수리나 별도로 정해진 유지보수 작업을 수행할 수 있을 것이다.In this process, 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.
한편, 본 발명에 의한 굴삭기에 적용할 경우, 전술한 바와 같이, 사용자의 커플러 기능 스위치(24)의 조작과 상기 커플링 해제유로(22)와 커플링 잠금유로(23) 사이의 압력변화에 의존하여 안전확인 기능 및 안전모니터링 기능이 수행되는 작동원리는 전술한 바와 마찬가지이므로 자세한 설명은 생략한다.On the other hand, when applied to the excavator according to the present invention, as described above, depending on the operation of the coupler function switch 24 of the user and the pressure change between the decoupling passage 22 and the coupling lock passage 23 Therefore, the operation principle of performing the safety check function and the safety monitoring function is the same as described above, so a detailed description thereof will be omitted.
이상의 실시 예들은 첨부된 도면 및 실시예에 따라 구체적으로 설명되었으나, 첨부된 도면 및 상기의 실시예는 본 발명에 대한 당해 기술분야에서 통상의 지식을 가진 자의 이해를 돕기 위해 예시적으로 설명된 것이다. 따라서, 상기의 실시예는 제한적인 것이 아닌 예시적인 것으로 여겨져야 하며, 본 발명의 범위는 첨부된 특허청구범위에 기재된 발명에 따라 해석되어야 하고, 그 범위는 당해 기술분야에서 통상의 지식을 가진 자에 의한 다양한 변경, 대안, 균등물을 포함한다.Although the above embodiments have been described in detail with reference to the accompanying drawings and embodiments, the accompanying drawings and the above embodiments have been described by way of example to help those skilled in the art to understand the present invention. . Accordingly, the above embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention should be construed in accordance with the invention set forth in the appended claims, the scope of which should be understood by those skilled in the art. Include various changes, alternatives, and equivalents by
본 발명은 건설기계에 퀵커플러를 이용하여 옵션장치를 부착 혹은 교체하거나 건설작업 과정에서 옵션장치의 결합 및 이탈 상태를 확인하면서 커플러 제어밸브와 커플링 해제유로 및 커플링 잠금유로의 유량을 제어하는데 매우 유용하다.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.

Claims (14)

  1. 엔진;engine;
    상기 엔진에 연결된 가변용량형 유압펌프와 고정형 유압펌프;A variable displacement hydraulic pump and a fixed hydraulic pump connected to the engine;
    붐이나 아암을 포함하는 작업장치의 구동을 위한 유압 액츄에이터;A hydraulic actuator for driving a work tool including a boom or an arm;
    상기 가변용량형 유압펌프와 상기 유압 액츄에이터 사이의 메인유로에 설치되며, 상기 작업장치의 기동, 정지 및 방향전환을 위하여 상기 가변용량형 유압펌프로부터 토출되는 작동유를 제어하는 메인제어밸브;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;
    커플러 실린더와 상기 커플러 실린더에 연결되는 커플링 해제유로 및 커플링 잠금유로를 구비하며, 옵션장치의 부착 또는 조립시에는 상기 고정형 유압펌프로부터 공급되는 작동유에 의해 잠금포지션으로 작동하고, 상기 옵션장치의 탈착 또는 분해시에는 상기 가변용량형 유압펌프로부터 공급되는 작동유에 의해 해제포지션으로 작동하는 퀵커플러 밸브블록;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;
    커플러 기능 스위치의 해제 조작시에 전환되어, 상기 가변용량형 유압펌프로부터 상기 커플링 해제유로를 통하여 상기 커플러 실린더에 공급되는 작동유의 흐름과 상기 커플링 잠금유로를 통하여 유압탱크에 배출되는 작동유의 흐름을 제어하는 커플러 제어밸브;The flow of hydraulic oil which is switched at the time of release operation of the coupler function switch and is supplied to the coupler cylinder from the variable displacement hydraulic pump through the coupling release flow passage and the hydraulic oil discharged to the hydraulic tank through the coupling lock flow passage. Coupler control valve for controlling the;
    상기 퀵커플러 밸브블록과 상기 가변용량형 유압펌프 사이에 설치되며, 상기 커플링 해제유로를 통하여 공급되는 파일럿 신호압력에 의해 절환 시에 상기 메인유로를 상기 커플러 제어밸브에 연결하는 파일럿 방향절환밸브; 및A 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; And
    상기 커플러 기능 스위치의 조작에 상응하여 선택적으로 상기 커플러 제어밸브의 전환 작동을 위한 제어신호를 출력하며, 상기 커플링 해제유로 및 커플링 잠금유로 각각의 압력 변화에 의존하여 상기 옵션장치의 부착 또는 조립의 초기에는 안전확인 기능을 제공하고 상기 옵션장치의 작동 중에는 안전모니터링 기능을 제공하는 컨트롤러를 포함하는 것을 특징으로 하는 유압제어장치.Selectively outputs a control signal for switching operation of the coupler control valve in response to the operation of the coupler function switch, and attaching or assembling the option device depending on the pressure change of the coupling release passage and the coupling lock passage The initial control of the hydraulic control device characterized in that it comprises a controller for providing a safety monitoring function during the operation of the optional device.
  2. 제 1 항에 있어서,The method of claim 1,
    상기 커플러 제어밸브와 상기 고정형 유압펌프 사이에 연결되는 유압라인에 안전밸브가 구성되며, Safety valve is configured in the hydraulic line connected between the coupler control valve and the fixed hydraulic pump,
    상기 안전밸브는 상기 컨트롤러로부터 제공되는 밸브제어신호에 상응하여 개방 및 폐쇄위치로 전환되는 것을 특징으로 하는 유압제어장치.And the safety valve is switched to the open and closed positions corresponding to the valve control signal provided from the controller.
  3. 제2항에 있어서,The method of claim 2,
    상기 커플러 제어밸브의 하류측에 형성되는 상기 커플링 해제유로 및 상기 커플링 잠금유로 각각에 압력센서가 설치되며, A pressure sensor is provided in each of the coupling release passage and the coupling lock passage formed on the downstream side of the coupler control valve,
    상기 압력센서들은 상기 커플링 해제유로 및 상기 커플링 잠금유로에 형성되는 유압의 변화에 상응하여 소정의 전류변화 신호를 상기 컨트롤러에 제공하는 것을 특징으로 하는 유압제어장치.And the pressure sensors provide a predetermined current change signal to the controller in response to a change in oil pressure formed in the decoupling flow path and the coupling lock flow path.
  4. 제 3 항에 있어서,The method of claim 3, wherein
    상기 컨트롤러는 상기 커플링 해제유로에 설치된 압력센서의 압력변화에 의존하여 안전확인 기능을 수행하며, 미리 설정된 알고리즘에 따라서 결정되는 안전 또는 이상 상태의 정보를 디스플레이 유닛에 출력하는 것을 특징으로 하는 유압제어장치.The controller performs a safety check function depending 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. Device.
  5. 제 3 항에 있어서,The method of claim 3, wherein
    상기 컨트롤러는 상기 커플링 잠금유로에 설치된 압력센서의 압력변화에 의존하여 안전모니터링 기능을 수행하며, 미리 설정된 알고리즘에 따라서 결정되는 안전 또는 이상 상태의 정보를 디스플레이 유닛에 출력하는 것을 특징으로 하는 유압제어장치.The controller performs a safety monitoring function depending on the pressure change of the pressure sensor installed in the coupling lock channel, and outputs the safety or abnormal state information determined by a preset algorithm to the display unit. Device.
  6. 제 3 항에 있어서,The method of claim 3, wherein
    상기 커플러 제어밸브와 상기 고정형 유압펌프 사이에 연결되는 유압라인에 셔틀밸브가 구성되며, 상기 셔틀밸브는 커플러 기능 스위치의 해제 조작시에 상기 파일럿 방향절환밸브를 통하여 도입되는 고압의 작동유를 상기 커플러 제어밸브에 제공하는 것을 특징으로 하는 유압제어장치.A shuttle valve is configured in a hydraulic line connected between the coupler control valve and the fixed hydraulic pump, and the shuttle valve controls the high pressure hydraulic oil introduced through the pilot directional valve during the release operation of the coupler function switch. Hydraulic control device characterized in that provided to the valve.
  7. 건설현장에서 지면을 따라 이동하는 하부주행체;A lower traveling body moving along the ground at the construction site;
    상기 하부주행체 상부에 회전 가능하게 탑재되는 상부프레임; An upper frame rotatably mounted on the lower running body;
    상기 상부프레임 일측에 설치되며, 내부에 안전스위치를 포함하는 다수의 작업장치용 조작수단이 구비된 운전실;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;
    엔진;engine;
    상기 엔진에 연결된 가변용량형 유압펌프와 고정형 유압펌프;A variable displacement hydraulic pump and a fixed hydraulic pump connected to the engine;
    붐이나 아암을 포함하는 작업장치의 구동을 위한 적어도 하나 이상의 유압 액츄에이터;At least one hydraulic actuator for driving a work tool comprising a boom or an arm;
    상기 가변용량형 유압펌프와 상기 유압 액츄에이터 사이에 설치되며, 상기 작업장치의 기동, 정지 및 방향전환을 위하여 상기 가변용량형 유압펌프로부터 토출되는 작동유를 제어하는 메인제어밸브;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;
    커플러 실린더와 상기 커플러 실린더에 연결되는 커플링 해제유로 및 커플링 잠금유로를 구비하며, 옵션장치의 부착 또는 조립시에는 상기 고정형 유압펌프로부터 공급되는 작동유에 의해 잠금포지션으로 작동하고, 상기 옵션장치의 탈착 또는 분해시에는 상기 가변용량형 유압펌프로부터 공급되는 작동유에 의해 해제포지션으로 작동하는 퀵커플러 밸브블록;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;
    커플러 기능 스위치의 해제 조작시에 전환되어, 상기 가변용량형 유압펌프로부터 상기 커플링 해제유로를 통하여 상기 커플러 실린더에 공급되는 작동유의 흐름과 상기 커플링 잠금유로를 통하여 유압탱크에 배출되는 작동유의 흐름을 제어하는 커플러 제어밸브;The flow of hydraulic oil which is switched at the time of release operation of the coupler function switch and is supplied to the coupler cylinder from the variable displacement hydraulic pump through the coupling release flow passage and the hydraulic oil discharged to the hydraulic tank through the coupling lock flow passage. Coupler control valve for controlling the;
    상기 퀵커플러 밸브블록과 상기 가변용량형 유압펌프 사이에 설치되며, 상기 커플링 해제유로를 통하여 공급되는 파일럿 신호압력에 의해 절환 시에 상기 메인유로를 상기 커플러 제어밸브에 연결하는 파일럿 방향절환밸브; 및A 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; And
    상기 커플러 기능 스위치의 조작에 상응하여 선택적으로 상기 커플러 제어밸브의 전환 작동을 위한 제어신호를 출력하며, 상기 커플링 해제유로 및 커플링 잠금유로 각각의 압력 변화에 의존하여 상기 옵션장치의 부착 또는 조립의 초기에는 안전확인 기능을 제공하고 상기 옵션장치의 작동 중에는 안전모니터링 기능을 제공하는 컨트롤러를 포함하여 구성되는 것을 특징으로 하는 건설기계.Selectively outputs a control signal for switching operation of the coupler control valve in response to the operation of the coupler function switch, and attaching or assembling the option device depending on the pressure change of the coupling release passage and the coupling lock passage The initial construction of the construction machine comprising a controller that provides a safety confirmation function and provides a safety monitoring function during the operation of the optional device.
  8. 제 7 항에 있어서,The method of claim 7, wherein
    상기 커플러 제어밸브와 상기 고정형 유압펌프 사이에 연결되는 유압라인에 안전밸브가 구성되며, Safety valve is configured in the hydraulic line connected between the coupler control valve and the fixed hydraulic pump,
    상기 안전밸브는 상기 안전스위치의 조작시에 상기 컨트롤러로부터 제공되는 밸브제어신호에 상응하여 개방 및 폐쇄위치로 전환되는 것을 특징으로 하는 건설기계.And the safety valve is switched to the open and closed positions in response to a valve control signal provided from the controller when the safety switch is operated.
  9. 제 7 항에 있어서,The method of claim 7, wherein
    상기 커플러 제어밸브의 하류측에 형성되는 상기 커플링 해제유로 및 상기 커플링 잠금유로 각각에 압력센서가 설치되며,A pressure sensor is provided in each of the coupling release passage and the coupling lock passage formed on the downstream side of the coupler control valve,
    상기 압력센서들은 상기 커플링 해제유로 및 상기 커플링 잠금유로에 형성되는 유압의 변화에 상응하여 소정의 전류변화 신호를 상기 컨트롤러에 제공하는 것을 특징으로 하는 건설기계.And the pressure sensors provide a predetermined current change signal to the controller in response to a change in hydraulic pressure formed in the decoupling passage and the coupling lock passage.
  10. 제 9 항에 있어서,The method of claim 9,
    상기 컨트롤러는 상기 커플링 해제유로에 설치된 압력센서의 압력변화에 의존하여 안전확인 기능을 수행하며, 미리 설정된 알고리즘에 따라서 결정되는 안전 또는 이상 상태의 정보를 사용자에게 지시하는 것을 특징으로 하는 건설기계.And the controller performs a safety check function depending on a pressure change of a pressure sensor installed in the decoupling passage, and instructs a user of safety or abnormal state information determined according to a preset algorithm.
  11. 제 9 항에 있어서,The method of claim 9,
    상기 컨트롤러는 상기 커플링 잠금유로에 설치된 압력센서의 압력변화에 의존하여 안전모니터링 기능을 수행하며, 미리 설정된 알고리즘에 따라서 결정되는 안전 또는 이상 상태의 정보를 사용자에게 지시하는 것을 특징으로 하는 건설기계.And the controller performs a safety monitoring function depending on a pressure change of a pressure sensor installed in the coupling lock channel, and instructs a user of safety or abnormal state information determined according to a preset algorithm.
  12. 제 9 항에 있어서,The method of claim 9,
    상기 커플러 제어밸브와 상기 고정형 유압펌프 사이에 연결되는 유압라인에 셔틀밸브가 구성되며, Shuttle valve is configured in the hydraulic line connected between the coupler control valve and the fixed hydraulic pump,
    상기 셔틀밸브는 커플러 기능 스위치의 해제 조작시에 상기 파일럿 방향절환밸브를 통하여 도입되는 고압의 작동유를 상기 커플러 제어밸브에 제공하는 것을 특징으로 하는 건설기계.And the shuttle valve provides the coupler control valve with high-pressure hydraulic oil introduced through the pilot directional control valve at the time of release operation of the coupler function switch.
  13. 제 7 항에 있어서,The method of claim 7, wherein
    상기 옵션장치는 브레이커나 도저블레이드, 브레이커, 해머 또는 쉐어를 포함하여 구성되는 것을 특징으로 하는 건설기계.The optional device is a construction machine, characterized in that comprises a breaker or dozer blade, breaker, hammer or shear.
  14. 제 12 항 또는 제 13 항에 있어서,The method according to claim 12 or 13,
    상기 건설기계는 굴삭기로 구성되는 것을 특징으로 하는 건설기계.The construction machine is a construction machine, characterized in that consisting of an excavator.
PCT/KR2013/012384 2013-12-30 2013-12-30 Hydraulic control device and construction equipment having same WO2015102120A1 (en)

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EP3546655A4 (en) * 2017-02-28 2020-07-08 Komatsu Ltd. Quick coupler circuit and quick coupler attachment/detachment method
WO2020196956A1 (en) * 2019-03-27 2020-10-01 Volvo Construction Equipment Ab Quick coupler circuit of construction machine with automatic pressurization system
EP4105390A4 (en) * 2020-03-16 2024-02-21 Komatsu Ltd. Hydraulic system for work machine, work machine, and method for controlling hydraulic system
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CN109681493A (en) * 2018-12-29 2019-04-26 湖北航天技术研究院总体设计所 Leveling control loop and control method based on hydraulic control self-lock
WO2020196956A1 (en) * 2019-03-27 2020-10-01 Volvo Construction Equipment Ab Quick coupler circuit of construction machine with automatic pressurization system
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EP4105390A4 (en) * 2020-03-16 2024-02-21 Komatsu Ltd. Hydraulic system for work machine, work machine, and method for controlling hydraulic system
EP4335975A1 (en) * 2022-09-06 2024-03-13 Oilquick AB Safety system for machine

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