WO2020059628A1 - Unité de soupape à commande multiple et dispositif d'entraînement hydraulique pour excavateur hydraulique - Google Patents

Unité de soupape à commande multiple et dispositif d'entraînement hydraulique pour excavateur hydraulique Download PDF

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Publication number
WO2020059628A1
WO2020059628A1 PCT/JP2019/035861 JP2019035861W WO2020059628A1 WO 2020059628 A1 WO2020059628 A1 WO 2020059628A1 JP 2019035861 W JP2019035861 W JP 2019035861W WO 2020059628 A1 WO2020059628 A1 WO 2020059628A1
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WIPO (PCT)
Prior art keywords
spool
control valve
pilot
hydraulic
valve
Prior art date
Application number
PCT/JP2019/035861
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English (en)
Japanese (ja)
Inventor
哲弘 近藤
直希 畑
Original Assignee
川崎重工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 川崎重工業株式会社 filed Critical 川崎重工業株式会社
Priority to CN201980028675.8A priority Critical patent/CN111989497B/zh
Publication of WO2020059628A1 publication Critical patent/WO2020059628A1/fr

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    • 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
    • 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
    • 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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves

Definitions

  • the present invention relates to a multi-control valve unit having a plurality of control valves and a hydraulic drive device for a hydraulic shovel.
  • Patent Document 1 discloses a hydraulic drive device in which pilot chambers of different control valves are connected to each other and has a pressure adjusting valve commonly connected to the pilot chambers.
  • Patent Document 2 discloses a multi-control valve unit using a plurality of control valves.
  • the hydraulic drive device disclosed in Patent Document 1 does not disclose a form in which the control valve is housed.
  • the hydraulic drive device disclosed in Patent Document 2 does not disclose a form in which pilot chambers of respective hydraulic control valves (control valves) communicate with each other. Therefore, when a configuration in which a pilot chamber is connected to another pilot chamber and a pressure control valve commonly connected to these pilot chambers is applied to a multi-control valve unit, the pilot chamber of one control valve is shifted from the pilot chamber of the other control chamber to the other.
  • the flow path extending to the pilot chamber of the control valve is arranged independently of each other among the plurality of control valves, and the configuration of the flow path may be complicated. Further, when external piping for connecting the pilot chambers is performed, a connecting member and piping are required, and piping connection work is also required. Therefore, the size of the multi-control valve unit may be increased, and the cost may increase.
  • an object of the present invention is to provide a multi-control valve unit and a hydraulic drive device for a hydraulic shovel in which the configuration of the flow path of the pressure oil is simple.
  • the multi-control valve unit of the present invention includes a first valve chamber and a second valve chamber therein, and the first valve chamber and the second valve chamber are arranged such that an axial direction of the first valve chamber and an axial direction of the second valve chamber are parallel to each other.
  • a second spool disposed so as to be able to move, a first pilot chamber for guiding pilot pressure to a pilot pressure receiving portion of the first spool, and a second pilot chamber for guiding pilot pressure to a pilot pressure receiving portion of the second spool.
  • a pilot chamber is provided inside, and a predetermined pressure oil can be supplied to both the pilot chamber forming member attached to the housing, the first pilot chamber, and the second pilot chamber, and pilot An electromagnetic proportional pressure reducing valve provided on a forming member, wherein the first spool moves in the axial direction inside the first valve chamber in accordance with the first pilot pressure, thereby causing the first valve chamber to move.
  • the connection state between a plurality of ports is switched within the first valve chamber, and the opening area between the plurality of ports inside the first valve chamber is adjusted, and the second spool is configured to respond to the second pilot pressure according to the second pilot pressure.
  • the connection state between the plurality of ports inside the second valve chamber is switched by moving in the axial direction inside the second valve chamber, and the opening area between the plurality of ports inside the second valve chamber is reduced. It is characterized by adjusting.
  • the first pilot chamber and the second pilot chamber are provided in one pilot chamber forming member, and the electromagnetic proportional pressure reducing valve is provided in the pilot chamber forming member.
  • the flow path between the first and second pilot chambers and the electromagnetic proportional pressure reducing valve are integrated into one member, so that the multi-control valve is formed compact. Therefore, the configuration of the pressure oil flow path is simplified, and the configuration of the multi-control valve can be reduced. Further, not only is there no need for a piping component for connecting a plurality of pilot chambers, but also the work for connecting the piping can be reduced.
  • the electromagnetic proportional pressure reducing valve when viewed along a direction perpendicular to a plane including the axis of the first spool and the axis of the second spool, the axis of the first spool and the axis of the second spool. It may be provided at a position between the shaft.
  • the electromagnetic proportional pressure reducing valve is provided at a position between the axis of the first spool and the axis of the second spool, a space for disposing the electromagnetic proportional pressure reducing valve is provided for the arrangement of the first spool and the second spool. And the spool can overlap in the axial direction of the spool, and the multi-control valve unit can be reduced in size.
  • the first spool and the second spool may switch a connection state between ports for pressure oil supplied by different hydraulic pumps and adjust an opening area.
  • the first spool and the second spool switch the connection state between ports for pressure oil supplied by different hydraulic pumps and adjust the opening area, so that the control valve supplied with pressure oil by different hydraulic pumps ,
  • the electromagnetic proportional pressure reducing valve can be shared.
  • a hydraulic drive device for a hydraulic shovel that controls driving of an actuator by using the multi-control valve unit having the above configuration, wherein the actuator includes an arm cylinder that causes an arm to perform a pushing operation and a pulling operation, The operation of the arm is controlled by controlling the drive of the arm cylinder by moving the spool and the second spool.
  • a hydraulic drive device for a hydraulic excavator that controls driving of an actuator using the multi-control valve unit having the above configuration, wherein the actuator includes a boom cylinder that performs a boom raising operation and a boom lowering operation,
  • the operation of the boom may be controlled by controlling the drive of the boom cylinder by moving the spool and the second spool.
  • the flow path between the first pilot chamber and the second pilot chamber and the electromagnetic proportional pressure reducing valve are provided. Can be put together in a pilot chamber forming member. Therefore, the configuration of the multi-control valve unit can be reduced in size.
  • FIG. 2 is a circuit diagram showing a part around a control valve connected to an arm cylinder in the circuit diagram of FIG. 1 in more detail.
  • FIG. 2 is a perspective view of a multi-control valve unit used in the hydraulic drive device for a hydraulic shovel of FIG. 1.
  • FIG. 2 is a cross-sectional view showing a pilot chamber formed in a pilot chamber forming member in each of two control valves and an electromagnetic proportional pressure reducing valve in the multi-control valve unit of FIG. 1.
  • Fig. 1 shows a circuit diagram of a hydraulic drive device for a hydraulic shovel.
  • the hydraulic drive system 2000 for a hydraulic shovel according to the present embodiment, two hydraulic pumps 200a and 200b are used.
  • the hydraulic drive device 2000 for a hydraulic shovel includes a tank 300.
  • the hydraulic pumps 200a and 200b may be swash plate pumps or oblique shaft pumps.
  • the hydraulic excavator hydraulic drive 2000 includes a plurality of control valves.
  • the plurality of control valves are arranged in two rows. That is, of the two hydraulic pumps 200a and 200b, a row of control valves arranged along the direction in which pressure oil is supplied from one hydraulic pump 200a, and the direction in which pressure oil is supplied from the other hydraulic pump 200b. And two rows of control valves.
  • the rows of the control valves are arranged such that the axial directions of the spools are parallel.
  • a control valve 510 for driving a bucket On the hydraulic pump 200a side, a control valve 510 for driving a bucket, a control valve 520 for driving an arm, a control valve 530 for driving a boom, and one crawler track are arranged in this order from the side closer to the hydraulic pump 200a.
  • a control valve 540 for driving is provided. However, the order of arrangement of these control valves can be changed.
  • a control valve 550 for driving a swing motor On the hydraulic pump 200b side, a control valve 550 for driving a swing motor, a control valve 560 for driving an arm, a control valve 570 for driving a boom, and the other are arranged in this order from the side closer to the hydraulic pump 200b.
  • a control valve 580 for driving the crawler is provided. However, the order of arrangement of these control valves can be changed.
  • the supply lines 310 and 320 which are the flow paths of the pressure oil supplied from the hydraulic pumps 200a and 200b, are branched at the position of each control valve, and the branched flow path of the pressure oil is connected to the port of each control valve. Connected to Thus, pressure oil from the hydraulic pumps 200a and 200b is supplied to each control valve.
  • the hydraulic drive device 2000 for a hydraulic shovel includes, as a hydraulic actuator, a bucket cylinder 610 for controlling driving of a bucket in the hydraulic shovel.
  • a bucket cylinder 610 for controlling driving of a bucket in the hydraulic shovel.
  • pressure oil is supplied to either the head side or the rod side of the bucket cylinder 610, the flow rate of the pressure oil discharged from the other is adjusted, and the direction of supply / discharge is changed.
  • a control valve 510 for switching is connected.
  • the hydraulic drive device 2000 for a hydraulic shovel includes an arm cylinder 620 for controlling driving of the operation of the arm in the hydraulic shovel.
  • Control valves 520 and 560 are connected to the arm cylinder 620 to supply pressure oil to one of the head side and the rod side of the arm cylinder 620 and to adjust the flow rate of the pressure oil discharged from the other. ing.
  • the arm cylinder 620 causes the arm to perform a pushing operation and a pulling operation. By controlling the driving of the arm cylinder 620, the operation of the arm can be controlled.
  • the hydraulic drive device 2000 for a hydraulic shovel includes a boom cylinder 630 that controls driving of a boom operation in the hydraulic shovel.
  • Control valves 530 and 570 are connected to the boom cylinder 630 to supply pressure oil to one of the head side and the rod side of the boom cylinder 630 and to adjust the flow rate of the pressure oil discharged from the other.
  • the boom cylinder 630 causes a boom raising operation and a boom lowering operation to be performed. By controlling the driving of the boom cylinder 630, the operation of the boom can be controlled.
  • the hydraulic drive device 2000 for a hydraulic shovel includes a hydraulic motor 640 that controls driving of one crawler belt of the hydraulic shovel.
  • the hydraulic motor 640 is connected to a control valve 540 that adjusts the flow rate of pressure oil supplied to and discharged from the hydraulic motor 640.
  • the hydraulic drive device 2000 for a hydraulic shovel includes a hydraulic motor 650 that drives a swing body of the hydraulic shovel.
  • the hydraulic motor 650 is connected to a control valve 550 for adjusting the flow rate of pressure oil supplied to and discharged from the hydraulic motor 650.
  • the hydraulic drive device 2000 for a hydraulic shovel includes a hydraulic motor 660 for controlling the driving of the other crawler belt in the hydraulic shovel.
  • the hydraulic motor 660 is connected to a control valve 580 for adjusting the flow rate of pressure oil supplied to and discharged from each pilot chamber of the hydraulic motor 660.
  • the control valve 510 is configured such that a flow path from the control valve 510 is connected to the bucket cylinder 610.
  • the slide movement of the spool inside the valve chamber of the control valve 510 controls supply and discharge of hydraulic oil to and from the bucket cylinder 610.
  • the spool moves in the axial direction inside the valve chamber according to the pilot pressure supplied to the pilot chamber.
  • the spool inside the control valve 510 moves to a position where the thrust corresponding to the pilot pressure and the return spring force (not shown) are balanced.
  • the control valve 510 allows one of the ports on the head side and the rod side of the bucket cylinder 610 to communicate with the pump port with an opening area corresponding to the amount of movement of the spool.
  • the hydraulic oil is supplied at an appropriate flow rate to one of the head side and the rod side of the bucket cylinder 610.
  • the other port on the head side and the rod side of the bucket cylinder 610 and the port of the tank passage communicate with an opening area determined according to the stroke of the spool, and the hydraulic oil is discharged.
  • the control valve 520 is configured such that a flow path from the control valve 520 is connected to the arm cylinder 620.
  • the sliding movement of the spool inside the valve chamber of the control valve 520 controls the supply and discharge of hydraulic oil to and from the arm cylinder 620.
  • the spool moves in the axial direction inside the valve chamber according to the pilot pressure supplied to the pilot chamber.
  • control valve 520 moves to a position where the thrust corresponding to the pilot pressure and the return spring force (not shown) are balanced.
  • the control valve 520 allows hydraulic oil to communicate between one port on the head side and the rod side of the arm cylinder 620 and the pump port with an opening area corresponding to the amount of movement of the spool.
  • the operating oil is supplied at an appropriate flow rate to one of the head side and the rod side of the arm cylinder 620.
  • the control valve 520 switches the connection state between the plurality of ports.
  • the other port on the head side and the rod side of the arm cylinder 620 and the port of the tank passage communicate with an opening area determined according to the stroke of the spool, and the hydraulic oil is discharged. That is, the control valve 520 switches the connection state between the plurality of ports so that the hydraulic oil in the arm cylinder 620 flows toward the tank 300, and discharges the hydraulic oil to the tank 300.
  • the control valve 530 is configured such that a flow path from the control valve 530 is connected to the boom cylinder 630.
  • the slide movement of the spool inside the valve chamber of the control valve 530 controls supply and discharge of hydraulic oil to and from the boom cylinder 630.
  • the spool moves in the axial direction inside the valve chamber according to the pilot pressure supplied to the pilot chamber.
  • control valve 530 moves to a position where the thrust corresponding to the pilot pressure and the return spring force (not shown) are balanced.
  • Hydraulic oil is communicated by the control valve 530 between one port on the head side and the rod side of the boom cylinder 630 and the pump port with an opening area corresponding to the movement amount of the spool.
  • the control valve 530 switches the connection state between the plurality of ports.
  • the other port on the head side and the rod side of the boom cylinder 630 communicates with the port of the tank passage with an opening area determined according to the stroke of the spool, and hydraulic oil is discharged from the boom cylinder 630.
  • the control valve 530 switches the connection state between the plurality of ports so that the hydraulic oil in the boom cylinder 630 flows toward the tank 300 to discharge the hydraulic oil to the tank 300.
  • the control valve 540 is configured such that a flow path from the control valve 540 is connected to the hydraulic motor 640.
  • the control valve 540 is configured to control the drive of a hydraulic motor 640 for driving one crawler belt by sliding the spool inside the valve chamber.
  • the spool moves in the axial direction inside the valve chamber according to the pilot pressure supplied to the pilot chamber.
  • the control valve moves to a position where the thrust corresponding to the pilot pressure and the return spring force (not shown) are balanced.
  • One of the ports of the hydraulic motor 640 and the pump port are communicated by the control valve 540 with an opening area corresponding to the amount of movement of the spool. In this way, the hydraulic oil is supplied at an appropriate flow rate to one port of the hydraulic motor.
  • the other port of the hydraulic motor 640 and the port of the tank passage are communicated with an opening area determined according to the stroke of the spool, and hydraulic oil is discharged toward the tank 300.
  • the control valve 550 has a flow path from the control valve 550 connected to a hydraulic motor 650 for rotating the revolving structure, and is configured to control the driving of the hydraulic motor 650.
  • the drive of the hydraulic motor 650 is controlled by the slide movement of the spool inside the valve chamber of the control valve 550.
  • the control valve 560 is configured such that a flow path therefrom is connected to the arm cylinder 620.
  • the slide movement of the spool inside the valve chamber of the control valve 560 controls supply and discharge of hydraulic oil to and from the arm cylinder 620.
  • the spool moves in the axial direction inside the valve chamber according to the pilot pressure supplied to the pilot chamber.
  • the spool inside the control valve 560 moves to a position where the thrust according to the pilot pressure and the return spring force (not shown) are balanced.
  • One port on the head side and the rod side of the arm cylinder 620 is communicated with the pump port by the control valve 560 with an opening area corresponding to the amount of movement of the spool.
  • the operating oil is supplied at an appropriate flow rate to one of the head side and the rod side of the arm cylinder 620.
  • the other port on the head side and the rod side of the arm cylinder 620 and the port of the tank passage communicate with an opening area determined according to the stroke of the spool, and the hydraulic oil is discharged.
  • the control valve 570 is configured such that a flow path from the control valve 570 is connected to the boom cylinder 630.
  • the slide movement of the spool inside the valve chamber of the control valve 570 controls the supply of hydraulic oil to the boom cylinder 630.
  • the spool moves in the axial direction inside the valve chamber according to the pilot pressure supplied to the pilot chamber.
  • the spool inside the control valve 630 moves to a position where the thrust according to the pilot pressure and the return spring force (not shown) are balanced.
  • the control valve 630 allows the head side port of the boom cylinder 630 to communicate with the pump port with an opening area corresponding to the amount of movement of the spool.
  • the control valve 570 has no flow path connected to the tank 300. Therefore, the pressure oil cannot be discharged from the boom cylinder 630 through the control valve 570. The discharge of the pressure oil from the boom cylinder 630 is performed only through the control valve 530. Therefore, the control valve 570 can be driven for the raising operation of the boom, and is not involved in the driving for the lowering operation of the boom.
  • the control valve 570 switches the connection between the ports so that the hydraulic oil is supplied to the boom cylinder 630 at an appropriate flow rate.
  • a control valve connected to the tank may be used instead, and the pressure oil may be discharged from the boom cylinder through the control valve.
  • a control valve adapted to the operation of lowering the boom may be used instead of the control valve 570. That is, instead of the control valve 570, a control valve of the same type as the control valve 530 may be applied.
  • the control valve 580 is configured such that a flow path from the control valve 580 is connected to the hydraulic motor 660.
  • the drive of the hydraulic motor 660 for driving the other crawler belt is switched.
  • each control valve has a valve chamber and a spool that can slide inside the valve chamber.
  • the spool is configured to be movable in the axial direction inside the valve chamber according to the pilot pressure.
  • a plurality of valve chambers are arranged such that the axial directions of the respective valve chambers are parallel to each other.
  • the spool is arranged inside the valve chamber so that the axial directions of the spool inside the valve chamber are parallel to each other.
  • FIG. 2 shows a more detailed circuit diagram of the hydraulic system of the control valves 520 and 560 connected to the arm cylinder 620 among the control valves 510 to 580 shown in FIG.
  • the control valve 520 includes pilot chambers 521 and 522.
  • the control valve 560 includes pilot chambers 561 and 562.
  • a pilot chamber (first pilot chamber) 521 and a pilot chamber (second pilot chamber) 561 are connected to form a pressure oil flow path 900.
  • An electromagnetic proportional pressure reducing valve 800 is attached to the flow path 900.
  • the electromagnetic proportional pressure reducing valve 800 is disposed between the pilot chamber 521 and the pilot chamber 561.
  • the electromagnetic proportional pressure reducing valve 800 is configured to be able to adjust the pressure of the pressure oil inside the flow path 900.
  • the pilot chamber 521 and the pilot chamber 561 are formed inside the pilot chamber forming member 130a.
  • Electromagnetic proportional pressure reducing valve 800 is provided in flow path 900 connecting pilot chamber 521 and pilot chamber 561. Therefore, the electromagnetic proportional pressure reducing valve 800 is configured to be able to simultaneously adjust both the pressure of the pressure oil in the pilot chamber 521 and the pressure of the pressure oil in the pilot chamber 561.
  • the pilot chamber 522 is connected to the pilot chamber 522 opposite to the pilot chambers 521 and 561.
  • An electromagnetic proportional pressure reducing valve 810 is disposed in a flow path 910 formed by connecting the pilot chamber 522 and the pilot chamber 562.
  • an electric signal corresponding to the inclination angle of the operation lever is output to a control device (not shown).
  • the control device detects that the operation lever has been depressed by the driver, the control device controls the electromagnetic proportional pressure reducing valve so that the pressure of the pressure oil inside the flow paths 900 and 910 becomes a pressure corresponding to the inclination angle of the operation lever.
  • the current supplied to 800 and 810 is controlled. Accordingly, the pressure oil flows into the flow paths 900 and 910 via the electromagnetic proportional pressure reducing valves 800 and 810 such that the pressure of the pressure oil inside the flow paths 900 and 910 becomes a pressure corresponding to the inclination angle of the operation lever.
  • the pilot pressure is controlled so that the pilot pressure in the pilot pressure receiving portions inside the pilot chambers 521 and 561 becomes a pilot pressure corresponding to the inclination angle of the operation lever.
  • pilot chamber 521 in the control valve 520 and the pilot chamber 561 in the control valve 560 are connected via a flow path, the pressure of the pressure oil in the pilot chamber 521 and the pressure of the pressure oil in the pilot chamber 561 are the same. become.
  • pilot chamber 522 in the control valve 520 and the pilot chamber 562 in the control valve 560 are connected via a flow path, the pressure of the pressure oil in the pilot chamber 522 and the pressure of the pressure oil in the pilot chamber 562 are connected. Is the same as
  • the control valves 510 to 580 shown in FIG. 1 are housed inside the housing 100 (see FIGS. 3 and 4) to constitute the multi-control valve unit 1000.
  • FIG. 3 is a perspective view of the multi-control valve unit 1000.
  • areas where the control valves 510 to 580 shown in FIG. 1 are located are divided by broken lines and indicated by reference numerals.
  • the multi-control valve unit 1000 includes the housing 100.
  • the housing 100 has a rectangular parallelepiped box shape.
  • a plurality of valve chambers of control valves 510 to 580 for controlling various actuators are housed inside the housing 100.
  • the housing 100 is formed with pump ports 110a and 110b through which pressure oil from the hydraulic pumps 200a and 200b passes.
  • two pump ports 110 a and 110 b are formed in the housing 100. Therefore, the pressure oil supplied from the two hydraulic pumps can be guided to the inside of the housing 100 by separate systems through the flow path of the pressure oil communicating with the two pump ports 110a and 110b.
  • control valves Inside the housing 100, a row of control valves arranged along a direction in which pressure oil from one hydraulic pump 200a is supplied through the pump port 110a, and a line passing through the pump port 110b from the other hydraulic pump 200b. And a row of control valves arranged along the direction in which the pressure oil is supplied. Therefore, in the present embodiment, the control valves are arranged in two rows inside the housing 100.
  • each control valve only the valve chamber of the control valve is disposed inside the housing 100. No pilot chamber is formed inside the housing 100. Inside the housing 100, the valve chambers are arranged such that their axial directions are parallel to each other.
  • Pilot chamber forming members 120 and 130 extending from a valve chamber of a control valve disposed inside the housing 100 to the outside of the housing 100 and having a pilot chamber for a corresponding control valve formed therein are attached to the housing 100. .
  • the pilot chambers of the corresponding control valves are formed inside the pilot chamber forming members 120 and 130.
  • the pilot chamber forming members 120 and 130 are attached to the housing 100 such that the distal end portions of the pilot chamber forming members 120 and 130 project outside the housing 100.
  • the pilot chamber forming members 120 and 130 include a pilot chamber forming member 120 corresponding to one control valve, and a pilot chamber forming member 130 attached across the two control valves.
  • a pilot chamber forming member 120a is mounted corresponding to control valve 510, and a pilot chamber forming member 120b is mounted corresponding to control valve 550.
  • a pilot chamber forming member 130a is attached across the control valves 520 and 560, and a pilot chamber forming member 130b is attached across the control valves 530 and 570.
  • a pilot chamber forming member 120c is mounted corresponding to control valve 540, and a pilot chamber forming member 120d is mounted corresponding to control valve 580.
  • the pilot chamber forming members 120a and 120b are provided at positions relatively close to the pump ports 110a and 110b, and the pilot chamber forming members 120 are relatively far from the pump ports 110a and 110b.
  • Forming members 120c and 120d are provided.
  • the pilot chamber forming members 120a, 120b and the pilot chamber forming members 120c, 120d Pilot chamber forming members 130a and 130b are arranged at positions between them.
  • the pilot chamber forming member 130a is disposed closer to the pump ports 110a and 110b than the pilot chamber forming member 130b.
  • the pilot chambers of the respective control valves are formed inside the pilot chamber forming members 120 and 130.
  • the pilot chamber forming members 130a and 130b have pilot chambers for two corresponding control valves therein.
  • a pilot chamber forming member 130 a having a pilot chamber for two control valves 520 and 560 for adjusting the flow rate of the pressure oil supplied to the port of the arm cylinder 620 is attached to the housing 100.
  • a pilot chamber forming member 130b having a pilot chamber for control valves 530 and 570 for adjusting the flow rate of the pressure oil supplied to the port of the boom cylinder 630 is attached to the housing 100.
  • the control valve 520 for adjusting the flow rate of the pressure oil supplied to the port of the arm cylinder 620 is formed corresponding to the flow path from the pump port 110a, and the control valve 560 is corresponding to the flow path from the pump port 110b. It is formed.
  • the pilot chamber forming member 130a corresponding to the control valves 520, 560 for the arm cylinder 620 is attached across the two control valves 520, 560 so as to have both the pilot chambers for the two control valves 520, 560. ing.
  • a control valve 530 for adjusting the flow rate of the pressure oil supplied to the port of the boom cylinder 630 is formed corresponding to the flow path from the pump port 110a, and the control valve 570 is connected to the flow path from the pump port 110b. It is formed correspondingly.
  • the pilot chamber forming member 130b corresponding to the control valves 530, 570 for the boom cylinder 630 is attached across the two control valves 530, 570 so as to have both pilot chambers for the two control valves 530, 570. ing.
  • the pilot chamber forming members 130a, 130b are provided with electromagnetic proportional pressure reducing valves 800a, 800b so as to protrude outward from the pilot chamber forming members 130a, 130b.
  • the electromagnetic proportional pressure reducing valve 800a is provided to protrude outward from the pilot chamber forming member 130a provided relatively close to the pump ports 110a and 110b. I have.
  • an electromagnetic proportional pressure reducing valve 800b is provided to protrude outward from a pilot chamber forming member 130b provided at a position relatively far from the pump ports 110a and 110b.
  • the pilot chamber forming member 130a provided at a position relatively close to the pump ports 110a and 110b is connected to the control unit connected to the arm cylinder 620.
  • a pilot chamber for the valves 520 and 560 is formed.
  • pilot chamber forming member 130b provided at a position relatively far from pump ports 110a and 110b forms pilot chambers of control valves 530 and 570 connected to boom cylinder 630.
  • FIG. 4 shows a pilot chamber 521 formed in the pilot chamber forming member 130a of the control valve 520, a pilot chamber 561 formed in the pilot chamber forming member 130a of the control valve 560, and a peripheral portion of the flow path 900 connecting these.
  • an electromagnetic proportional pressure reducing valve 800a is disposed in a flow path 900 between the pilot chamber 521 and the pilot chamber 561.
  • the electromagnetic proportional pressure reducing valve 800a includes a spool (first spool) 525 inside the valve chamber (first valve chamber) 524 of the control valve 520 and a spool (second spool) inside the valve chamber (second valve chamber) 564 of the control valve 560. It is provided at a position between the pilot chamber 521 and the pilot chamber 561 when viewed along the axial direction of the (two spools) 565. That is, when the control valve 520 and the control valve 560 are viewed in a direction perpendicular to a plane including the axis of the spool 525 and the axis of the spool 565, the electromagnetic proportional pressure reducing valve 800a And is provided at a position between them.
  • the pilot chamber 521 is formed in the pilot chamber forming member 130a at a position on an axial extension of the spool 525 disposed inside the valve chamber 524 of the control valve 520.
  • the pilot chamber 561 is formed on the pilot chamber forming member 130a at a position on an axial extension of the spool 565 disposed inside the valve chamber 564 of the control valve 560.
  • the electromagnetic proportional pressure reducing valve 800a is provided on the pilot chamber forming member 130a.
  • the pilot chamber forming member 130a includes a spring chamber 523 at a position corresponding to the control valve 520.
  • the spring chamber 523 is provided with a spring 523a.
  • the spring 523a urges when the spool 525 strokes to the pilot chamber 521 side, and also urges when the spool 525 strokes to the opposite side to the pilot chamber 521.
  • the pilot chamber forming member 130a includes a spring chamber 563 at a position corresponding to the control valve 560.
  • the spring chamber 563 is provided with a spring 563a.
  • the spring 563a is energized when the spool 565 strokes to the pilot chamber 561 side, and is also energized when the spool 565 strokes to the opposite side to the pilot chamber 561.
  • pilot chamber forming members 120 and 130 are attached to the housing 100. Pilot chambers for the respective control valves are formed in the pilot chamber forming members 120 and 130.
  • the pilot chamber inside the pilot chamber forming members 120 and 130 is arranged at a position facing the valve chamber, and a control valve is formed.
  • the pressure oil is supplied to the pilot chamber 521 of the control valve 520 and the control chamber 521 in accordance with the depressed amount of the operation lever. It is supplied to the pilot chamber 561 of the valve 560.
  • the pressure of the hydraulic oil in the pilot chamber 521 (first pilot pressure) and the pressure of the hydraulic oil in the pilot chamber 561 (second pilot pressure) ) Will be the same. Therefore, the spool 525 of the control valve 520 and the spool 565 of the control valve 560 move according to the pressure of the pressure oil in the pilot chamber 521 and the pilot chamber 561. The spool 525 of the control valve 520 and the spool 565 of the control valve 560 move similarly.
  • the pilot chamber forming member 130a is provided with the pilot chamber 521, the pilot chamber 561, and the electromagnetic proportional pressure reducing valve 800a, and the multi-control valve unit 1000 is configured. Since the pilot chamber 521, the pilot chamber 561, and the electromagnetic proportional pressure reducing valve 800a are provided in one pilot chamber forming member 130a, the number of components is reduced, and the configuration of the multi-control valve unit 1000 is simplified accordingly. In addition, since the flow paths connected to the pilot chamber 521 and the pilot chamber 561 are formed collectively in one pilot chamber forming member 130a, the configuration of the flow path is simplified. Therefore, the configuration of the flow path of the multi-control valve unit 1000 is simplified. As described above, since the configuration of the multi-control valve unit 1000 is simplified, the manufacturing cost of the multi-control valve unit 1000 can be reduced.
  • the pilot chamber 521 formed in the pilot chamber forming member 130a of the control valve 520 and the pilot chamber 561 formed in the pilot chamber forming member 130a of the control valve 560 are connected to each other. Is provided with an electromagnetic proportional pressure reducing valve 800a. That is, in the control valve 520 and the control valve 560, the electromagnetic proportional pressure reducing valve 800a is shared between the pilot chambers 521 and 561. Therefore, the number of electromagnetic proportional pressure reducing valves can be reduced as compared with a configuration in which each of the pilot chamber 521 and the pilot chamber 561 is separately provided with an electromagnetic proportional pressure reducing valve. Therefore, the configuration of the multi-control valve unit 1000 can be simplified, and the manufacturing cost of the multi-control valve unit 1000 can be reduced.
  • the size of the multi-control valve unit 1000 can be reduced accordingly. Therefore, even if the space for mounting the multi-control valve unit 1000 is limited, the multi-control valve unit 1000 can be mounted inside the space. Further, since there are few restrictions on space, the multi-control valve unit 1000 can be widely applied.
  • the configuration of the flow path of the pressure oil for guiding the pressure oil to each electromagnetic proportional pressure reducing valve can be simplified. Since the configuration of the pressure oil flow path is simplified, the manufacturing cost of the multi-control valve unit 1000 can be reduced.
  • the electromagnetic proportional pressure reducing valve 800a is provided at a position between the pilot chamber 521 and the pilot chamber 561. And the space for disposing the valve chambers 524, 564 and the spools 525, 565 can be overlapped in the axial direction of the spools 525, 565. Therefore, the size of the multi-control valve unit 1000 can be reduced in the direction intersecting the axial direction of the spools 525 and 565.
  • the electromagnetic proportional pressure reducing valve 800a is shared between the control valves 520 and 560 that switch the connection state between the flow paths of the pressure oil supplied by the different hydraulic pumps 200a and 200b. Let me. Therefore, in the control valves 520 and 560 to which the pressure oil is supplied by the different hydraulic pumps 200a and 200b, the pilot proportional chambers 521 and 561 can share the electromagnetic proportional pressure reducing valve 800a.
  • the electromagnetic proportional pressure reducing valve 800a is shared between the pilot chambers 521 and 561. Therefore, in the control valves 520 and 560 connected to the arm cylinder 620, the electromagnetic proportional pressure reducing valve 800a is shared, and the configuration is simplified. In the control valves 520 and 560 connected to the arm cylinder 620, the configuration of the flow path between the pilot chambers 521 and 561 is simplified.
  • one pilot chamber forming member is provided between the respective control valves 530 and 570 with the pilot chamber and the electromagnetic proportional. It is configured to provide a pressure reducing valve.
  • the multi-control valve unit 1000 not only the pilot chamber forming member 130a in which the pilot chambers 521 and 561 of the control valves 520 and 560 connected to the arm cylinder 620 are formed, but also the boom cylinder 630 The pilot chambers of the control valves 530 and 570 connected to the control valve 530 and 570 are formed on the pilot chamber forming member 130b corresponding to the control valves 530 and 570.
  • the multi-control valve unit can have a simpler configuration and can be downsized.
  • the pilot chambers 521 and 561 of the control valves 520 and 560 connected to the arm cylinder 620 are formed in the pilot chamber forming member 130a, and the pilot chambers of the control valves 530 and 570 connected to the boom cylinder 630 are formed.
  • the form formed in the pilot chamber forming member 130b has been described, the present invention is not limited to the above embodiment. Only one of the pilot chambers 521 and 561 of the control valves 520 and 560 connected to the arm cylinder 620 and the pilot chamber of the control valves 530 and 570 connected to the boom cylinder 630 has two control valves.
  • the formed pilot chamber may be configured to be formed in one pilot chamber forming member. At this time, between the control valve connected to the arm cylinder 620 and the control valve connected to the boom cylinder 630, the pilot chamber formed in either control valve is formed in one pilot chamber forming member. May be configured.
  • two hydraulic pumps are provided, and the control valves connected to different hydraulic pumps share the electromagnetic proportional pressure reducing valve.
  • the number of hydraulic pumps is not limited to two. In a hydraulic system using three or more hydraulic pumps, two of the hydraulic pumps may be configured such that an electromagnetic proportional pressure reducing valve is shared between control valves connected to different hydraulic pumps. Good.
  • the hydraulic oil from the hydraulic pumps 200a and 200b is supplied through the supply lines 310 and 320, and the supply lines 310 and 320 are branched at the positions of the respective control valves.
  • Pressure oil is supplied to each control valve by connecting the flow path to the port of each control valve.
  • the present invention is not limited to the above embodiment, and is configured such that the pressure oil supplied from the hydraulic pumps 200a and 200b is supplied to each control valve through a flow path other than the supply lines 310 and 320. Is also good.
  • the pressure oil may be supplied to each control valve through a center bypass line in which the pressure oil is directly supplied from the hydraulic pumps 200a and 200b to each control valve.
  • a pressure oil flow path as a center bypass line may be configured to supply pressure oil to each control valve from hydraulic pump 200a through control valves 510 to 540 in order. Further, a flow path of the pressure oil as a center bypass line may be configured to supply the pressure oil to each control valve from the hydraulic pump 200b through the control valves 550 to 580 in order.
  • a control valve for controlling the driving of the boom, the arm and the bucket and a control valve for controlling the driving of the hydraulic motor for the turning operation of the cabin and the traveling drive are provided inside the housing 100.
  • the configuration provided for each has been described.
  • the present invention is not limited to the above embodiment.
  • the actuator whose driving is controlled by the control valve may have another configuration.
  • a multi-control valve unit having some types of control valves may be used to control the driving of only some of the actuators.
  • a multi-control valve unit having a control valve for driving a type of actuator not used in the present embodiment may be used.
  • Pilot chamber forming member 200a Housing 130a, 130b Pilot chamber forming member 200a, 200b Hydraulic pump 510, 520, 530, 540, 550, 560, 570, 580
  • Control valve 521 Pilot chamber (first pilot chamber) 524 valve room (first valve room) 525 spool (first spool) 561 Pilot room (2nd pilot room) 564 valve room (second valve room) 565 spool (second spool) 620 Arm cylinder 630 Boom cylinder 800a, 800b
  • Electromagnetic proportional pressure reducing valve 1000 Multi control valve unit

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Valve Housings (AREA)

Abstract

L'invention concerne une unité de soupape à commande multiple ayant une configuration simple de passage d'écoulement d'huile hydraulique et un dispositif d'entraînement hydraulique pour une excavatrice hydraulique. Dans cette unité de soupape à commande multiple, un élément de formation de chambre pilote, pourvu à l'intérieur, avec une première chambre pilote qui guide une première pression pilote pour commander une première bobine et une seconde chambre pilote qui guide une seconde pression pilote pour commander une seconde bobine, est fixé à un boîtier et une soupape de réduction de pression proportionnelle électromagnétique capable de commander la première pression pilote et la seconde pression pilote est disposée dans l'élément de formation de chambre pilote.
PCT/JP2019/035861 2018-09-18 2019-09-12 Unité de soupape à commande multiple et dispositif d'entraînement hydraulique pour excavateur hydraulique WO2020059628A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201980028675.8A CN111989497B (zh) 2018-09-18 2019-09-12 多控制阀单元及油压挖掘机用油压驱动装置

Applications Claiming Priority (2)

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JP2018173914A JP7149140B2 (ja) 2018-09-18 2018-09-18 マルチコントロールバルブユニット及び油圧ショベル用油圧駆動装置
JP2018-173914 2018-09-18

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WO2020059628A1 true WO2020059628A1 (fr) 2020-03-26

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018021288A1 (fr) * 2016-07-29 2018-02-01 住友建機株式会社 Excavatrice et soupape de commande pour excavatrice

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006007935A1 (de) 2006-02-21 2007-10-25 Liebherr France Sas Steuervorrichtung und hydraulische Vorsteuerung
JP5087047B2 (ja) 2009-06-18 2012-11-28 日立建機株式会社 油圧作業機械
JP5463219B2 (ja) 2010-07-01 2014-04-09 日立建機株式会社 油圧作業機の油圧駆動装置
JP6495857B2 (ja) * 2016-03-31 2019-04-03 日立建機株式会社 建設機械

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018021288A1 (fr) * 2016-07-29 2018-02-01 住友建機株式会社 Excavatrice et soupape de commande pour excavatrice

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JP2020045950A (ja) 2020-03-26
JP7149140B2 (ja) 2022-10-06
CN111989497A (zh) 2020-11-24
CN111989497B (zh) 2023-02-17

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