WO2020166591A1 - Unité de soupape à commande multiple et machine de construction - Google Patents

Unité de soupape à commande multiple et machine de construction Download PDF

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Publication number
WO2020166591A1
WO2020166591A1 PCT/JP2020/005282 JP2020005282W WO2020166591A1 WO 2020166591 A1 WO2020166591 A1 WO 2020166591A1 JP 2020005282 W JP2020005282 W JP 2020005282W WO 2020166591 A1 WO2020166591 A1 WO 2020166591A1
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WO
WIPO (PCT)
Prior art keywords
pilot
pressure oil
control valve
valve
pilot chamber
Prior art date
Application number
PCT/JP2020/005282
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English (en)
Japanese (ja)
Inventor
誠司 青木
藤山　和人
善之 東出
田中　良和
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 CN202080013816.1A priority Critical patent/CN113383168B/zh
Publication of WO2020166591A1 publication Critical patent/WO2020166591A1/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

Definitions

  • the present invention relates to a multi-control valve unit having a plurality of control valves and a construction machine.
  • Patent Document 1 proposes a valve of a type in which a valve for controlling supply and cutoff of a working fluid to a pilot chamber is provided only on one side of a control valve.
  • the valve proposed in Patent Document 1 only proposes a structure with a single control valve. Therefore, when the control valve described in Patent Document 1 is adopted in a multi-control valve unit having a plurality of control valves, there is no disclosure of the structure of the flow passage of the pressure oil provided for each control valve. .. If the pressure oil passages provided for the respective control valves are formed in a random manner, it may lead to an increase in the configuration of the multi-control valve unit having a plurality of control valves.
  • an object of the present invention is to provide a multi-control valve unit and a construction machine having a simple configuration.
  • the multi-control valve unit of the present invention is provided with a housing having a plurality of valve chambers therein, and movably in the axial direction in each of the valve chambers, and moves in the axial direction in the valve chambers.
  • the plurality of spools for switching the connection state between the plurality of ports and adjusting the area of the communicating portion communicating between the plurality of ports, and the first pilot pressure on one side of each of the plurality of spools.
  • a plurality of first pilot chambers for guiding the first pilot pressure to the pressure receiving portion, and a plurality of second pilot pressures for guiding the second pilot pressure to the second pilot pressure receiving portion on the other side of each of the plurality of spools.
  • the first pilot chamber forming member disposed on the one side of the housing so as to cover the plurality of first pilot chambers, and the housing so as to individually cover the plurality of second pilot chambers.
  • the housing so as to individually cover the plurality of second pilot chambers.
  • second pilot chamber forming members which are arranged on the other side opposite to the one side of the above, and which accommodate therein springs for biasing the spool to the neutral position, and the first pilot chamber forming member.
  • a plurality of first proportional valves and a plurality of second proportional valves provided, and provided in the first pilot chamber forming member and connected to each of the plurality of first proportional valves and each of the plurality of second proportional valves Pressure oil flow paths, a plurality of first pilot flow paths that respectively connect the plurality of first proportional valves and the plurality of first pilot chambers, the plurality of second proportional valves and the plurality of second It has a plurality of 2nd pilot channels which each connect with a pilot room.
  • the first pilot chamber forming member is formed with the pressure oil flow passage for allowing the pressure oil supplied to each of the plurality of first pilot chambers and each of the plurality of second pilot chambers to flow. Therefore, it is possible to supply the pressure oil from the pressure oil passage common to the plurality of spools toward the first pilot chamber and the second pilot chamber for each spool. Therefore, the structure of the pressure oil passage in the multi-control valve unit can be simplified, and the structure of the multi-control valve unit can be simplified.
  • the plurality of valve chambers are arranged in a first direction orthogonal to the axial direction of the spool, and the pressure oil flow passage is formed inside the first pilot chamber forming member so as to extend in the first direction. It may have been done.
  • the structure of the pressure oil flow path can be simplified, and the structure of the multi-control valve unit can be further improved. Can be simplified.
  • a plurality of valve chamber rows in which the plurality of valve chambers are arranged in the first direction are arranged in a second direction intersecting with the first direction, and the pressure oil flow paths are provided in the respective valve chamber rows.
  • the pressure oil flow passages provided and provided for each of the valve chamber rows may communicate with each other.
  • the number of pressure oil passages can be reduced because the pressure oil passages provided in each valve chamber row communicate with each other. Therefore, the structure of the multi-control valve unit can be simplified.
  • first pilot chamber forming member is connected to each of the plurality of first proportional valves and each of the plurality of second proportional valves, and the plurality of first pilot chambers and the plurality of second pilot chambers are connected.
  • a drain passage may be provided to guide the pressure oil discharged from the tank to the tank.
  • a drain passage for guiding the pressure oil discharged from the first pilot chamber and the pressure oil discharged from the second pilot chamber to the tank is provided for the plurality of valve chambers, a drain common to the plurality of valve chambers is provided.
  • the pressure oil can be guided from the flow path to the tank. Therefore, the configuration of the drain passage in the multi-control valve unit can be simplified, and the configuration of the multi-control valve unit can be simplified.
  • the plurality of valve chambers are arranged in a first direction orthogonal to the axial direction of the spool, and the drain passage is formed inside the first pilot chamber forming member and extends in the first direction. May be.
  • the drain passage is formed so as to extend in the same direction as the direction in which the plurality of valve chambers are arranged, the configuration of the drain passage can be simplified and the configuration of the multi-control valve unit can be simplified. can do.
  • a plurality of valve chamber rows in which the plurality of valve chambers are arranged in the first direction are arranged in a second direction intersecting with the first direction, and the drain passage is provided in each of the valve chamber rows.
  • the drain passages provided for the respective valve chamber rows may communicate with each other.
  • the number of drain passages can be reduced because the drain passages provided in each valve chamber row communicate with each other. Therefore, the structure of the multi-control valve unit can be simplified.
  • the construction machine of the present invention is a construction machine that controls the drive of an actuator using the multi-control valve unit described above, wherein the multi-control valve unit is arranged such that the one side is positioned downward in the direction of gravity. It is located behind the cabin.
  • the construction machine with the above configuration is equipped with a simplified multi-control valve unit, so the construction machine configuration can be simplified accordingly.
  • the multi-control valve unit since the structure of the multi-control valve unit can be simplified, the multi-control valve unit can be downsized.
  • FIG. 2 is a perspective view of a multi-control valve unit used in the hydraulic drive system for the hydraulic excavator of FIG. 1.
  • 4A is a cross-sectional view of the multi-control valve unit of FIG. 4 seen from the side
  • FIG. 4B is a cross-sectional view of the multi-control valve unit of FIG. 4 seen from the front.
  • FIG. 5 is a cross-sectional view of the multi-control valve unit of the cover of the multi-control valve unit of FIG. 4 in which the pressure oil flow paths communicate with each other, as seen from the front. It is sectional drawing seen from the side about the modification of the multi-control valve unit of FIG.
  • FIG. 2 is a schematic side view of a hydraulic excavator when the multi-control valve unit of FIG. 1 is mounted on the hydraulic excavator.
  • the multi-control valve unit is used as a drive device for a hydraulic excavator that controls driving of an actuator in the hydraulic excavator.
  • FIG. 1 shows a circuit diagram of a hydraulic drive system for a hydraulic excavator of this embodiment.
  • the hydraulic excavator hydraulic drive device 2000 of the present embodiment two hydraulic pumps 200a and 200b are used to supply pressure oil for controlling the drive of the actuator toward each control valve.
  • the hydraulic excavator hydraulic drive device 2000 includes a tank 300.
  • the hydraulic pumps 200a and 200b may be swash plate pumps or swash shaft pumps.
  • two hydraulic pumps 200a and 200b are used to supply pressure oil for controlling the drive of various actuators to each control valve.
  • the present invention is not limited to this.
  • the number of hydraulic pumps for driving the actuator may not be two. For example, three or more hydraulic pumps may be used, or only one hydraulic pump may be used.
  • the hydraulic drive system 2000 for a hydraulic excavator is equipped with 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 a direction in which pressure oil is supplied from the other hydraulic pump 200b. Are arranged in two rows, with a row of control valves lined up along. The rows of the respective control valves are arranged so that the axial directions of the spools are parallel to each other.
  • the control valve does not have to be two rows.
  • the control valves may be arranged in three rows, or the control valves may be arranged in one row.
  • a control valve 510 for driving the bucket On the hydraulic pump 200a side, a control valve 510 for driving the bucket, a control valve 520 for driving the arm, a control valve 530 for driving the boom, and one crawler belt are arranged in order from the side closer to the hydraulic pump 200a.
  • a control valve 540 for driving is provided. However, the arrangement order of these control valves can be changed.
  • a control valve 550 for driving the swing motor On the hydraulic pump 200b side, a control valve 550 for driving the swing motor, a control valve 560 for driving the arm, a control valve 570 for driving the boom, and the other on the other side in this order from the side closer to the hydraulic pump 200b.
  • a control valve 580 for driving the crawler belt is provided. However, the arrangement order 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 positions of the respective control valves, and the branched pressure oil flow paths are connected to the ports of the respective control valves. Connected to. As a result, the pressure oil from the hydraulic pumps 200a and 200b is supplied to each control valve.
  • the hydraulic excavator hydraulic drive device 2000 of the present embodiment includes a bucket cylinder 610 as a hydraulic actuator for controlling drive of a bucket in the hydraulic excavator.
  • a bucket cylinder 610 as a hydraulic actuator for controlling drive of a bucket in the hydraulic excavator.
  • 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 supply/discharge direction is changed.
  • a control valve 510 for switching is connected.
  • the hydraulic drive system 2000 for a hydraulic excavator is provided with an arm cylinder 620 for controlling the drive of the operation of the arm in the hydraulic excavator.
  • Control valves 520 and 560 are connected to the arm cylinder 620 to supply pressure oil to either the head side or the rod side of the arm cylinder 620 and to adjust the flow rate of the pressure oil discharged from the other side. ing.
  • the arm cylinder 620 causes the arm to perform a pushing operation and a pulling operation. By controlling the drive of the arm cylinder 620, the operation of the arm can be controlled.
  • the hydraulic drive system 2000 for the hydraulic excavator is equipped with a boom cylinder 630 that controls the drive of the operation of the boom in the hydraulic excavator.
  • Boom cylinder 630 is connected to control valves 530 and 570 for supplying pressure oil to either the head side or the rod side of boom cylinder 630 and adjusting the flow rate of the pressure oil discharged from the other side. ing.
  • the boom cylinder 630 executes a boom raising operation and a boom lowering operation. By controlling the drive of the boom cylinder 630, the operation of the boom can be controlled.
  • the hydraulic drive system 2000 for the hydraulic excavator includes a hydraulic motor 640 that controls the drive of one crawler track in the hydraulic excavator.
  • 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 excavator hydraulic drive device 2000 includes a hydraulic motor 650 that drives a revolving structure in the hydraulic excavator.
  • the hydraulic motor 650 is connected to a control valve 550 that adjusts the flow rate of pressure oil supplied to and discharged from the hydraulic motor 650.
  • the hydraulic drive system 2000 for the hydraulic excavator includes a hydraulic motor 660 that controls the driving of the other crawler belt in the hydraulic excavator.
  • the hydraulic motor 660 is connected to a control valve 580 that adjusts 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 the flow path from the control valve 510 is connected to the bucket cylinder 610.
  • the spool slides inside the valve chamber of the control valve 510 to control the 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 has a pilot pressure receiving portion (first pilot pressure receiving portion) that receives pilot pressure on one side, and a pilot pressure receiving portion (second pilot pressure receiving portion) that receives pilot pressure on the other side. )have.
  • Two pilot chambers are formed for one control valve, and the spool moves in accordance with the pressure difference between the pilot pressures acting on the respective pilot pressure receiving portions in the two pilot chambers.
  • the spool inside the control valve 510 moves to a position where the thrust corresponding to the pilot pressure and the restoring force of the spring 517 (FIGS. 5A and 5B) are in balance.
  • the control valve 510 one of the port on the head side and the rod side of the bucket cylinder 610 and the pump port communicate with each other 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 of the head side and the rod side of the bucket cylinder 610.
  • the other head-side and rod-side ports of the bucket cylinder 610 communicate with the drain port of the tank passage at an opening area determined according to the stroke of the spool, and hydraulic oil is discharged to the tank 300 through the drain line 350a.
  • control valve 520 is configured such that the flow path from the control valve 520 is connected to the arm cylinder 620.
  • the spool slides inside the valve chamber of the control valve 520 to control 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.
  • the control valve 520 moves to a position where the thrust corresponding to the pilot pressure and the restoring force of the spring 527 (FIG. 5A) are in balance.
  • the control valve 520 allows hydraulic fluid to communicate with one of the head-side and rod-side ports of the arm cylinder 620 and the pump port 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 of the head side and the rod side of the arm cylinder 620. As a result, the control valve 520 switches the connection state between the plurality of ports. Further, the other head side and rod side ports of the arm cylinder 620 and the drain port of the tank passage are communicated with each other in 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 the hydraulic oil is discharged to the tank 300 through the drain line 350a.
  • control valve 530 is configured such that the flow path from the control valve 530 is connected to the boom cylinder 630.
  • the spool slides inside the valve chamber of the control valve 530 to control the supply and discharge of the hydraulic oil to the boom cylinder 630. Similar to the control valves 510 and 520, also in the control valve 530, the spool moves in the axial direction inside the valve chamber according to the pilot pressure supplied to the pilot chamber. Specifically, the control valve 530 moves to a position where the thrust force corresponding to the pilot pressure and the restoring force of the spring 537 (FIG. 5A) are in balance.
  • the control valve 530 allows hydraulic fluid to communicate with one of the head side and rod side ports of the boom cylinder 630 and the pump port with an opening area corresponding to the movement amount of the spool. In this way, the hydraulic oil is supplied at an appropriate flow rate to one of the head side and rod side ports of the boom cylinder 630. In this way, the control valve 530 switches the connection state between the plurality of ports. At the same time, the other head-side and rod-side ports of the boom cylinder 630 and the drain port of the tank passage communicate with each other with an opening area that is 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, and discharges the hydraulic oil to the tank 300 through the drain line 350a.
  • the control valve 540 is configured such that the flow path from the control valve 540 is connected to the hydraulic motor 640.
  • the spool is configured to slide inside the valve chamber of the control valve 540 to control the drive of the hydraulic motor 640 that drives one crawler belt.
  • 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 force corresponding to the pilot pressure and the restoring force of the spring 547 (FIG. 5A) are in balance.
  • the control valve 540 allows one of the ports of the hydraulic motor 640 and the pump port to communicate with each other with an opening area corresponding to the movement amount of the spool.
  • the hydraulic oil is supplied to one port of the hydraulic motor at an appropriate flow rate.
  • the other port of the hydraulic motor 640 and the drain port of the tank passage communicate with each other with an opening area determined according to the stroke of the spool, and the hydraulic oil is discharged toward the tank 300 through the drain line 350a.
  • the control valve 550 is configured such that a flow path from the control valve 550 is connected to a hydraulic motor 650 for rotating the revolving structure and controls the drive of the hydraulic motor 650.
  • the drive of the hydraulic motor 650 is controlled by the sliding movement of the spool inside the valve chamber of the control valve 550.
  • the spool moves axially inside the valve chamber according to the pilot pressure supplied to the pilot chamber.
  • the control valve moves to a position where the thrust force according to the pilot pressure and the restoring force of the spring 557 (FIG. 5B) are in balance.
  • the control valve 550 allows one of the ports of the hydraulic motor 650 and the pump port to communicate with each other with an opening area corresponding to the movement amount of the spool.
  • the hydraulic oil is supplied to one port of the hydraulic motor at an appropriate flow rate.
  • the other port of the hydraulic motor 650 and the drain port of the tank passage are communicated with each other with an opening area determined according to the stroke of the spool, and the hydraulic oil is discharged toward the tank 300 through the drain line 350b.
  • the control valve 560 is configured such that the flow path from the control valve 560 is connected to the arm cylinder 620.
  • the spool slides inside the valve chamber of the control valve 560 to control 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.
  • the spool inside the control valve 560 moves to a position where the thrust force according to the pilot pressure and the restoring force of the spring 567 (FIG. 5B) are in balance.
  • the control valve 560 connects one of the head-side port and the rod-side port of the arm cylinder 620 and 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 arm cylinder 620.
  • the other head-side and rod-side ports of the arm cylinder 620 and the tank passage port are communicated with each other in an opening area determined according to the stroke of the spool, and hydraulic oil is discharged to the tank 300 through the drain line 350b. ..
  • the control valve 570 is configured such that the flow path from the control valve 570 is connected to the boom cylinder 630.
  • the spool slides inside the valve chamber of the control valve 570 to control 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 570 moves to a position where the thrust force according to the pilot pressure and the restoring force of the spring 574 (FIGS. 2 and 5B) are in balance.
  • the control valve 570 allows the head side port of the boom cylinder 630 and the pump port to communicate with each other in an opening area corresponding to the movement amount of the spool.
  • the control valve 570 does not have a 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 pressure oil is discharged from the boom cylinder 630 only through the control valve 530. Therefore, the control valve 570 can be driven for the raising operation of the boom and does not participate in the driving during the lowering operation of the boom.
  • the control valve 570 switches the connection state 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 that is also adapted to the boom lowering operation 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 the flow path from the control valve 580 is connected to the hydraulic motor 660.
  • the spool is slidably moved inside the valve chamber of the control valve 580 to switch the drive of the hydraulic motor 660 for driving the other crawler belt.
  • the spool moves axially inside the valve chamber according to the pilot pressure supplied to the pilot chamber.
  • the control valve moves to a position where the thrust force according to the pilot pressure and the restoring force of the spring 587 (FIG. 5B) are in balance.
  • the control valve 580 allows one of the ports of the hydraulic motor 660 and the pump port to communicate with each other in an opening area corresponding to the movement amount of the spool. In this way, the hydraulic oil is supplied to one port of the hydraulic motor at an appropriate flow rate.
  • the other port of the hydraulic motor 660 and the drain port of the tank passage are communicated with each other with an opening area determined according to the stroke of the spool, and the hydraulic oil is discharged toward the tank 300 through the drain line 350b
  • 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.
  • FIG. 2 shows a circuit diagram of the hydraulic system showing the flow path of the pressure oil for supplying the pressure oil to the pilot chamber when moving the spool in the control valves 510 to 580 shown in FIG.
  • the hydraulic drive system 2000 for a hydraulic excavator is provided with a pressure oil passage 330 communicating with each of the control valves 510 to 580. That is, the pressure oil flow path 330 communicates with each of the pilot chambers of the plurality of control valves 510 to 580. Two pilot chambers are provided for each of the control valves 510 to 580.
  • the pressure oil flow passage 330 In the pressure oil flow passage 330, the pressure oil flow passage 330a connected to the control valves 510 to 540 and the pressure oil flow passage 330b connected to the control valves 550 to 580 are in communication with each other.
  • a hydraulic pump 200c is connected to one end of the pressure oil flow path 330. By driving the hydraulic pump 200c, pressure oil is supplied into the pressure oil passage 330.
  • the hydraulic drive system 2000 for the hydraulic excavator is provided with a drain passage 360 communicating with each of the control valves 510 to 580. That is, the drain passage 360 communicates with each of the pilot chambers of the plurality of control valves 510 to 580. Two pilot chambers are provided for each of the control valves 510 to 580.
  • the drain flow path 360 In the drain flow path 360, the drain flow path 360a connected to the control valves 510 to 540 and the drain flow path 360b connected to the control valves 550 to 580 are in communication with each other.
  • the tank 300a is connected to the other end of the drain passage 360 opposite to the one end on the side where the hydraulic pump 200c is arranged.
  • the drain passage 360 guides the pressure oil discharged from each of the plurality of pilot chambers (first pilot chamber) and the pressure oil discharged from each of the plurality of pilot chambers (second pilot chamber) to tank 300a. Circulate pressure oil.
  • the control valve 510 includes a pilot chamber (first pilot chamber) 511 and a pilot chamber (second pilot chamber) 512. Between the pressure oil flow passage 330a and the pilot chamber 511, a branch flow passage 331 branched from the pressure oil flow passage 330a is formed toward the pilot chamber 511. Further, a branch channel 361 branched from the drain channel 360a toward the pilot chamber 511 is formed between the drain channel 360a and the pilot chamber 511.
  • the control valve 510 is connected to both the branch flow passage 331 and the branch flow passage 361, is connected to the flow passage 511a communicating with the pilot chamber 511, and is discharged from the pressure oil supplied to the pilot chamber 511 and the pilot chamber 511.
  • the solenoid proportional valve 513 controls the pressure oil supplied from the pressure oil flow passage 330a to the pilot chamber 511 via the branch flow passage 331 and the flow passage 511a (first pilot flow passage). Further, the pressure oil discharged from the pilot chamber 511 to the drain flow path 360a via the flow path 511a and the branch flow path 361 is controlled.
  • the control valve 510 is connected to both the branch flow passage 332 and the branch flow passage 362, is connected to the flow passage 512 a communicating with the pilot chamber 512, and is discharged from the pressure oil supplied to the pilot chamber 512 and the pilot chamber 512. It has an electromagnetic proportional valve (second proportional valve) 514 for controlling the pressure oil to be generated.
  • the electromagnetic proportional valve 514 controls the pressure oil supplied from the pressure oil flow passage 330a to the pilot chamber 512 via the branch flow passage 332 and the flow passage 512a (second pilot flow passage). Further, the pressure oil discharged from the pilot chamber 512 to the drain flow path 360a via the flow path 512a and the branch flow path 362 is controlled.
  • the control valve 520 includes a pilot chamber (first pilot chamber) 521 and a pilot chamber (second pilot chamber) 522.
  • a branch passage 333 branched from the pressure oil passage 330a is formed so as to connect the pressure oil passage 330a and the pilot chamber 521.
  • a branch flow passage 363 branched from the drain flow passage 360a is formed so as to connect the drain flow passage 360a and the pilot chamber 521.
  • the control valve 520 is connected to both the branch flow passage 333 and the branch flow passage 363, is connected to the flow passage 521a (first pilot flow passage) communicating with the pilot chamber 512, and is supplied to the pilot chamber 521. It has an electromagnetic proportional valve (first proportional valve) 523 for controlling oil and pressure oil discharged from the pilot chamber 521.
  • a branch passage 334 is formed so as to connect the pressure oil passage 330a and the pilot chamber 522 to each other. Further, a branch channel 364 branched from the drain channel 360a is formed so as to connect the drain channel 360a and the pilot chamber 522.
  • the control valve 520 is connected to both the branch flow passage 334 and the branch flow passage 364, is connected to the flow passage 522 a (second pilot flow passage) communicating with the pilot chamber 522, and is supplied to the pilot chamber 522. It has an electromagnetic proportional valve (second proportional valve) 524 for controlling the oil and the pressure oil discharged from the pilot chamber 522.
  • control valve 530 includes a pilot chamber (first pilot chamber) 531 and a pilot chamber (second pilot chamber) 532.
  • a branch channel 335 branched from the pressure oil channel 330a is formed so as to connect the pressure oil channel 330a and the pilot chamber 531.
  • a branch flow channel 365 branched from the drain flow channel 360a is formed so as to connect the drain flow channel 360a and the pilot chamber 531.
  • the control valve 530 is connected to both the branch flow passage 335 and the branch flow passage 365, is connected to the flow passage 531a (first pilot flow passage) communicating with the pilot chamber 531, and is supplied to the pilot chamber 531. It has an electromagnetic proportional valve (first proportional valve) 533 for controlling oil and pressure oil discharged from the pilot chamber 531.
  • a branch channel 336 branched from the pressure oil channel 330a is formed so as to connect between the pressure oil channel 330a and the pilot chamber 532. Further, a branch channel 366 branched from the drain channel 360a is formed so as to connect the drain channel 360a and the pilot chamber 532.
  • the control valve 530 is connected to both the branch flow passage 336 and the branch flow passage 366, is connected to the flow passage 532 a (second pilot flow passage) communicating with the pilot chamber 532, and is supplied to the pilot chamber 532. It has an electromagnetic proportional valve (second proportional valve) 534 for controlling the oil and the pressure oil discharged from the pilot chamber 532.
  • control valve 540 includes a pilot chamber (first pilot chamber) 541 and a pilot chamber (second pilot chamber) 542.
  • a branch channel 337 branched from the pressure oil channel 330a is formed so as to connect the pressure oil channel 330a and the pilot chamber 541.
  • a branch channel 367 branched from the drain channel 360a is formed so as to connect between the drain channel 360a and the pilot chamber 541.
  • the control valve 540 is connected to both the branch channel 337 and the branch channel 367, is connected to the channel 541 a (first pilot channel) communicating with the pilot chamber 541, and is supplied to the pilot chamber 541. It has an electromagnetic proportional valve (first proportional valve) 543 for controlling oil and pressure oil discharged from the pilot chamber 541.
  • a branch channel 338 branched from the pressure oil channel 330a is formed so as to connect between the pressure oil channel 330a and the pilot chamber 542. Further, a branch channel 368 branched from the drain channel 360a is formed so as to connect between the drain channel 360a and the pilot chamber 542.
  • the control valve 540 is connected to both the branch flow passage 338 and the branch flow passage 368, is connected to the flow passage 542 a (second pilot flow passage) communicating with the pilot chamber 542, and is supplied to the pilot chamber 542. It has an electromagnetic proportional valve (second proportional valve) 544 for controlling the oil and the pressure oil discharged from the pilot chamber 542.
  • control valve 550 includes a pilot chamber (first pilot chamber) 551 and a pilot chamber (second pilot chamber) 552.
  • a branch passage 339 branched from the pressure oil passage 330b is formed so as to connect the pressure oil passage 330b and the pilot chamber 551.
  • a branch channel 369 branched from the drain channel 360b is formed so as to connect the drain channel 360b and the pilot chamber 551.
  • the control valve 550 is connected to both the branch flow channel 339 and the branch flow channel 369, is connected to the flow channel 551a (first pilot flow channel) communicating with the pilot chamber 551, and is supplied to the pilot chamber 551. It has an electromagnetic proportional valve (first proportional valve) 553 for controlling oil and pressure oil discharged from the pilot chamber 551.
  • a branch channel 340 branched from the pressure oil channel 330b is formed so as to connect between the pressure oil channel 330b and the pilot chamber 552. Further, a branch flow passage 370 branched from the drain flow passage 360b is formed so as to connect the drain flow passage 360b and the pilot chamber 552.
  • the control valve 550 is connected to both the branch flow passage 340 and the branch flow passage 370, is connected to the flow passage 552a (second pilot flow passage) communicating with the pilot chamber 552, and is supplied to the pilot chamber 552. It has an electromagnetic proportional valve (second proportional valve) 554 for controlling oil and pressure oil discharged from the pilot chamber 552.
  • control valve 560 includes a pilot chamber (first pilot chamber) 561 and a pilot chamber (second pilot chamber) 562.
  • a branch channel 341 branched from the pressure oil channel 330b is formed so as to connect between the pressure oil channel 330b and the pilot chamber 561.
  • a branch flow channel 371 branched from the drain flow channel 360b is formed so as to connect the drain flow channel 360b and the pilot chamber 561.
  • the control valve 560 is connected to both the branch flow passage 341 and the branch flow passage 371, is connected to the flow passage 561a (first pilot flow passage) communicating with the pilot chamber 561, and is supplied to the pilot chamber 561. It has an electromagnetic proportional valve (first proportional valve) 563 for controlling oil and pressure oil discharged from the pilot chamber 561.
  • a branch flow passage 342 branched from the pressure oil flow passage 330b is formed so as to connect the pressure oil flow passage 330b and the pilot chamber 562. Further, a branch channel 372 branched from the drain channel 360b is formed so as to connect the drain channel 360b and the pilot chamber 562.
  • the control valve 560 is connected to both the branch flow channel 342 and the branch flow channel 372, is connected to the flow channel 562a (second pilot flow channel) communicating with the pilot chamber 562, and is supplied to the pilot chamber 562. It has an electromagnetic proportional valve (second proportional valve) 564 for controlling oil and pressure oil discharged from the pilot chamber 562.
  • the control valve 570 has a pilot chamber 571. In the present embodiment, the control valve 570 includes only one pilot chamber 571.
  • a branch passage 343 is formed so as to connect the pressure oil passage 330b and the pilot chamber 571 to each other. Further, a branch flow channel 373 branched from the drain flow channel 360b is formed so as to connect the drain flow channel 360b and the pilot chamber 572.
  • the control valve 570 is connected to both the branch flow channel 343 and the branch flow channel 373, is connected to the flow channel 571a communicating with the pilot chamber 571, and discharges the pressure oil supplied to the pilot chamber 571 and the pilot chamber 571. It has an electromagnetic proportional valve 573 for controlling the pressure oil to be generated.
  • the control valve 570 also has a spring 574 that biases the spool to the neutral position.
  • the control valve 580 also includes a pilot chamber (first pilot chamber) 581 and a pilot chamber (second pilot chamber) 582.
  • a branch channel 344 branched from the pressure oil channel 330b is formed so as to connect between the pressure oil channel 330b and the pilot chamber 581.
  • a branch flow channel 374 branched from the drain flow channel 360b is formed so as to connect the drain flow channel 360b and the pilot chamber 581.
  • the control valve 580 is connected to both the branch flow channel 344 and the branch flow channel 374, is connected to the flow channel 581 a (first pilot flow channel) communicating with the pilot chamber 581, and is supplied to the pilot chamber 581. It has an electromagnetic proportional valve (first proportional valve) 583 for controlling oil and pressure oil discharged from the pilot chamber 581.
  • a branch channel 345 branched from the pressure oil channel 330b is formed so as to connect between the pressure oil channel 330b and the pilot chamber 582. Further, a branch flow channel 375 branched from the drain flow channel 360b is formed so as to connect between the drain flow channel 360b and the pilot chamber 582.
  • the control valve 580 is connected to both the branch flow channel 345 and the branch flow channel 375, is connected to the flow channel 582 a (second pilot flow channel) communicating with the pilot chamber 582, and is supplied to the pilot chamber 582. It has an electromagnetic proportional valve (second proportional valve) 584 for controlling oil and pressure oil discharged from the pilot chamber 582.
  • control valves 510, 520, 530, 540, 550, 560, 580 have the first proportional valve for controlling the pilot pressure inside the first pilot chamber and the pilot pressure inside the second pilot chamber. And a second proportional valve for controlling Further, the control valve 570 has one proportional valve for controlling the pilot pressure inside one pilot chamber.
  • the electromagnetic proportional valves 513, 514 provided in the control valve 510 will be described in more detail with reference to FIG.
  • the control valve 510 controls the pressure oil supplied to the pilot chamber 511 and the pressure oil discharged from the pilot chamber 511, and an electromagnetic proportional valve 513 for controlling the oil pressure inside the pilot chamber 511.
  • An electromagnetic proportional valve 514 that controls the pressure oil supplied to the pilot chamber 512 and the pressure oil discharged from the pilot chamber 512 and controls the oil pressure inside the pilot chamber 512.
  • the solenoid proportional valve 513 switches the flow path of the connection destination connected to the flow path 511a communicating with the pilot chamber 511 according to the applied electric signal, and adjusts the flow rate of the pressure oil flowing through the flow path.
  • the solenoid proportional valve 513 the flow passage connected to the flow passage 511 a is switched between the branch flow passage 331 and the branch flow passage 361. Thereby, either the supply of the pressure oil to the pilot chamber 511 or the discharge of the pressure oil from the pilot chamber 511 can be selectively performed.
  • the pressure oil When supplying the pressure oil to the pilot chamber 511, the pressure oil is supplied to the solenoid proportional valve 513 via the branch flow passage 331 branched from the pressure oil passage 330a, and the pressure oil passing through the solenoid proportional valve 513 is The pressure oil is supplied to the pilot chamber 511 through a flow path 511a that allows pressure oil to flow between the electromagnetic proportional valve 513 and the pilot chamber 511. Further, when the pressure oil is discharged from the pilot chamber 511, the pressure oil inside the pilot chamber 511 passes through the electromagnetic proportional valve 513 via the flow passage 511 a, merges with the drain flow passage 360 a via the branch flow passage 362.
  • the solenoid proportional valve 513 adjusts the pressure oil supplied from the pressure oil flow passage 330a to the pilot chamber 511, and adjusts the pressure oil discharged from the first pilot chamber 511 to the drain flow passage 360a, thereby controlling the pilot oil flow.
  • the pressure in chamber 511 can be adjusted.
  • the solenoid proportional valve 514 can switch the connection destination flow path connected to the flow path 512a communicating with the pilot chamber 512 according to the applied electric signal.
  • the flow path connected to the flow path 512a is switched between the branch flow path 332 and the branch flow path 362. Either the supply of the pressure oil to the pilot chamber 512 or the discharge of the pressure oil from the pilot chamber 512 can be selectively performed.
  • the pressure oil is supplied to the pilot chamber 512, the pressure oil is supplied to the solenoid proportional valve 514 via the branch passage 332 branched from the pressure oil passage 330 a, and the pressure oil passing through the solenoid proportional valve 514 is The oil is supplied to the pilot chamber 512 through a flow path 512a that allows pressure oil to flow between the electromagnetic proportional valve 514 and the pilot chamber 512. Further, when the pressure oil is discharged from the pilot chamber 512, the pressure oil inside the pilot chamber 512 passes through the electromagnetic proportional valve 514 via the flow path 512 a, merges with the drain flow path 360 a via the branch flow path 362.
  • the solenoid proportional valve 514 adjusts the pressure oil supplied from the pressure oil passage 330a to the pilot chamber 512, adjusts the pressure oil discharged from the pilot chamber 512 to the drain passage 360a, and adjusts the pilot oil 512.
  • the pressure of can be adjusted.
  • an electric signal corresponding to the tilt angle of the operating lever is output to the control device (not shown).
  • the control device detects that the operating lever has been tilted by the driver, the control device adjusts the electromagnetic proportionality so that the pressure of the pressure oil inside each pilot chamber becomes a pressure according to the tilt angle of the operating lever. Controls the current supplied to the valve. As a result, the pressure oil flows into the pilot chambers via the solenoid proportional valves so that the pressure of the pressure oils in the respective pilot chambers becomes a pressure according to the tilt angle of the operation lever. As a result, each pilot pressure is controlled so that the pilot pressure in the pilot pressure receiving portion inside each pilot chamber becomes the pilot pressure according to the tilt angle of the operation lever.
  • control valves 510 to 580 shown in FIGS. 1 to 3 are housed inside the housing 100 (see FIGS. 4 to 7) to form a multi-control valve unit 1000.
  • FIG. 4 shows a perspective view of the multi-control valve unit 1000.
  • the regions where the control valves 510 to 580 shown in FIG. 4 are shown in FIG. 4, in the multi-control valve unit 1000, the regions where the control valves 510 to 580 shown in FIG.
  • the multi-control valve unit 1000 has a housing 100.
  • the housing 100 has a rectangular parallelepiped box shape. Inside the housing 100, a plurality of valve chambers of control valves 510 to 580 for controlling various actuators are housed.
  • a plurality of valve chambers are arranged in the D1 direction (first direction) orthogonal to the axial direction of the spool to form a valve chamber row.
  • four valve chambers are arranged in a row in the D1 direction to form a valve chamber row.
  • a plurality of valve chamber rows in which four valve chambers are arranged in the D1 direction are arranged in the D2 direction (second direction) intersecting the D1 direction.
  • two valve chamber rows are arranged in the D2 direction.
  • the axial direction of the spool orthogonal to the D1 direction and the D2 direction is referred to as the D3 direction.
  • the housing 100 is formed with pump ports 110a and 110b through which the pressure oil from the hydraulic pumps 200a and 200b passes.
  • the housing 100 has two pump ports 110a and 110b formed therein. Therefore, the pressure oil supplied from the two hydraulic pumps can be introduced into the housing 100 in different systems through the pressure oil passages communicating with the two pump ports 110a and 110b.
  • a cover (first pilot chamber forming member) 700 is attached to the housing 100.
  • the cover 700 is provided only on one side of the housing 100, and is attached below the housing 100 in FIG.
  • covers 700a and 700b that are different for each valve chamber row are attached to the housing 100, respectively.
  • FIG. 5 shows a sectional view of the multi-control valve unit 1000.
  • FIG. 5A shows a cross-sectional view of the internal configuration of the multi-control valve unit 1000 of FIG. 4 as seen in the D2 direction
  • FIG. 5B shows the internal configuration of the multi-control valve unit 1000.
  • a cross-sectional view of the configuration as viewed in the direction D1 is shown.
  • the cover 700 is arranged so as to face downward in the direction of gravity so that the multi-control valve unit 1000 has the posture (FIG. 8) when mounted on a hydraulic excavator.
  • valve chambers 516, 526, 536, 546, 556, 566, 576, Only 586 are arranged.
  • No pilot chamber is formed inside the housing 100.
  • the valve chambers 516 to 586 are arranged such that their axial directions are parallel to each other.
  • spools 515, 525, 535, 545, 555, 565, 575 and 585 are arranged so that their axial directions are parallel to each other.
  • a spring chamber is formed which extends from the valve chamber to the outside of the housing 100 and has a pilot chamber for the corresponding control valve formed therein.
  • the members 120a to 120h are attached.
  • a pilot chamber (second pilot chamber) of the corresponding control valve is formed inside the spring chamber forming members 120a to 120h.
  • the spring chamber forming members 120a to 120h are attached to the housing 100 so that the tips of the spring chamber forming members 120a to 120h project to the outside of the housing 100.
  • the spring chamber forming members 120a to 120h are arranged so as to individually cover the plurality of pilot chambers.
  • springs 517, 527, 537, 547, 557, 567, 574, 587 for returning the respective spools 515 to 585 to the neutral positions are arranged inside the spring chamber forming members 120a to 120h. Further, inside each of the spring chamber forming members 120a to 120h, an upper ring and a lower ring are arranged in order to hold the springs 517 to 587 at predetermined positions inside the spring chamber forming members 120a to 120h. There is.
  • the spools 515 to 585 are configured to be maintained in a neutral position by being biased by springs 517 to 587 and move according to the pilot pressure in the pilot chamber.
  • the spring chamber forming members 120a to 120h form pilot chambers (second pilot chambers) therein and also function as spring chambers for housing the springs 517 to 587 therein.
  • pilot chambers second pilot chambers
  • the form in which the entire pilot chamber (second pilot chamber) is formed inside the spring chamber forming members 120a to 120h has been described, but the present invention is not limited to the above embodiment.
  • a configuration in which only a part of the pilot chamber (second pilot chamber) is formed inside the spring chamber forming members 120a to 120h may be adopted. At least a part of the pilot chamber (second pilot chamber) may be formed inside the spring chamber forming members 120a to 120h.
  • the spring chamber forming member 120a is attached to the housing 100 so as to form the pilot chamber 512 of the control valve 510.
  • the spring chamber forming member 120b is attached to the housing 100 so as to form the pilot chamber 522 of the control valve 520.
  • the spring chamber forming member 120c is attached to the housing 100 so as to form the pilot chamber 532 of the control valve 530.
  • the spring chamber forming member 120d is attached to the housing 100 so as to form the pilot chamber 542 of the control valve 540.
  • the spring chamber forming member 120e is attached to the housing 100 so as to form the pilot chamber 552 of the control valve 550.
  • the spring chamber forming member 120f is attached to the housing 100 so as to form the pilot chamber 562 of the control valve 560. Further, the spring chamber forming member 120g is attached to the housing 100 so as to form the pilot chamber 571 of the control valve 570. Further, the spring chamber forming member 120h is attached to the housing 100 so as to form the pilot chamber 582 of the control valve 580.
  • a cover 700 forms a pilot chamber (first pilot chamber) on one side of the housing 100.
  • a recess is formed inside the cover 700, and the cover 700 is attached to the housing 100 so as to cover the end of the valve chamber, so that a pilot chamber is formed between the housing 100 and the cover 700.
  • the cover 700 is arranged on one side of the housing 100 so as to cover the plurality of pilot chambers.
  • the control valve may be configured such that only a part of the pilot chamber is formed in the cover 700 and a part of the pilot chamber is formed inside the housing 100. At least a part of the pilot chamber may be formed in the cover 700.
  • a pilot chamber 511 of the control valve 510 a pilot chamber 521 of the control valve 520, a pilot chamber 531 of the control valve 530, and a pilot chamber 541 of the control valve 540 are formed inside the cover 700a.
  • a pilot chamber 551 of the control valve 550, a pilot chamber 561 of the control valve 560, and a pilot chamber 581 of the control valve 580 are formed inside the cover 700b.
  • a pressure oil flow path 330a is formed in the cover 700a along the direction D1 in FIGS. 4 and 5(a).
  • a pressure oil flow path 330b is formed in the cover 700b along the direction D1.
  • the pressure oil passages 330a and 330b are formed over substantially the entire D1 direction of the covers 700a and 700b. Therefore, the pressure oil flow path 330a is formed in communication with each of the plurality of pilot chambers 511, 512, 521, 522, 531, 532, 541, 542. Further, the pressure oil flow path 330b is formed in communication with each of the plurality of pilot chambers 551, 552, 561, 562, 571, 572, 581, 582.
  • drain channel 360a is formed in the cover 700a along the direction D1 of FIGS. 4 and 5(a).
  • a drain flow path 360b is formed in the cover 700b along the direction D1.
  • the drain channels 360a and 360b are formed over substantially the entire D1 direction of the covers 700a and 700b. Therefore, the drain passage 360a is formed in communication with each of the plurality of pilot chambers 511, 512, 521, 522, 531, 532, 541, 542.
  • the drain passage 360b is formed so as to communicate with each of the plurality of pilot chambers 551, 552, 561, 562, 571, 581, 582.
  • two electromagnetic proportional valves are attached to one control valve at positions corresponding to the control valve on the cover 700.
  • the control valve 510 has an electromagnetic proportional valve 513 and an electromagnetic proportional valve 514 attached to the cover 700a.
  • the electromagnetic proportional valve 513 is connected to the branch flow passage 331 and the branch flow passage 361 and also connected to the flow passage 511a (FIG. 2). Therefore, using the solenoid proportional valve 513, it is possible to control the amount of pressure oil supplied from the pressure oil passage 330a to the pilot chamber 511 and the amount of pressure oil discharged from the pilot chamber 511 to the drain passage 360a. Thus, the pilot pressure (first pilot pressure) inside the pilot chamber 511 can be controlled.
  • the solenoid proportional valve 514 is connected to the branch flow passage 332 and the branch flow passage 362 and also connected to the flow passage 512a to be attached.
  • the solenoid proportional valve 514 it is possible to control the amount of pressure oil supplied from the pressure oil passage 330a to the pilot chamber 512 and the amount of pressure oil discharged from the pilot chamber 512 to the drain passage 360b.
  • the pilot pressure (second pilot pressure) inside pilot chamber 512 can be controlled.
  • the spool 515 inside the valve chamber 516 of the control valve 510 can be moved.
  • the control valve 520 has a solenoid proportional valve 523 and a solenoid proportional valve 524 attached to the cover 700a.
  • the solenoid proportional valve 523 is connected to the branch flow channel 333 and the branch flow channel 363, and also connected to the flow channel 521a and attached. Therefore, using the solenoid proportional valve 523, it is possible to control the amount of pressure oil supplied from the pressure oil passage 330a to the pilot chamber 521 and the amount of pressure oil discharged from the pilot chamber 521 to the drain passage 360a. Thus, the pilot pressure inside the pilot chamber 521 can be controlled.
  • the solenoid proportional valve 524 is connected to the branch flow passage 334 and the branch flow passage 364 and also connected to the flow passage 522a and attached.
  • the solenoid proportional valve 524 it is possible to control the amount of pressure oil supplied from the pressure oil flow passage 330a to the pilot chamber 522 and the amount of pressure oil discharged from the pilot chamber 522 to the drain flow passage 360a.
  • the pilot pressure inside the pilot chamber 522 can be controlled.
  • the spool 525 inside the valve chamber 526 of the control valve 520 can be moved.
  • Electromagnetic proportional valves 533 and 534 are attached to the control valve 530 on the cover 700a.
  • the electromagnetic proportional valve 533 is connected to the branch flow passage 335 and the branch flow passage 365, and also connected to the flow passage 531a and attached. Therefore, using the solenoid proportional valve 533, it is possible to control the amount of pressure oil supplied from the pressure oil passage 330a to the pilot chamber 531 and the amount of pressure oil discharged from the pilot chamber 531 to the drain passage 360a. Thus, the pilot pressure inside the pilot chamber 531 can be controlled.
  • the solenoid proportional valve 534 is connected to the branch flow passage 336 and the branch flow passage 366, and also connected to the flow passage 532a and attached.
  • the solenoid proportional valve 534 it is possible to control the amount of pressure oil supplied from the pressure oil flow passage 330a to the pilot chamber 532 and the amount of pressure oil discharged from the pilot chamber 532 to the drain flow passage 360a.
  • the pilot pressure inside pilot chamber 532 can be controlled.
  • the spool 535 inside the valve chamber 536 of the control valve 530 can be moved.
  • the control valve 540 has solenoid proportional valves 543 and 544 attached to the cover 700a.
  • the solenoid proportional valve 543 is connected to the branch flow channel 337 and the branch flow channel 367 and also connected to the flow channel 541a. Therefore, using the solenoid proportional valve 543, it is possible to control the amount of pressure oil supplied from the pressure oil passage 330a to the pilot chamber 541 and the amount of pressure oil discharged from the pilot chamber 541 to the drain passage 360a. Thus, the pilot pressure inside the pilot chamber 541 can be controlled.
  • the solenoid proportional valve 544 is connected to the branch flow passage 338 and the branch flow passage 368, and also connected to the flow passage 542a and attached.
  • the solenoid proportional valve 544 it is possible to control the amount of pressure oil supplied from the pressure oil passage 330a to the pilot chamber 542 and the amount of pressure oil discharged from the pilot chamber 542 to the drain passage 360a.
  • the pilot pressure inside the pilot chamber 542 can be controlled.
  • the spool 545 inside the valve chamber 546 of the control valve 540 can be moved.
  • the control valve 550 has electromagnetic proportional valves 553 and 554 attached to the cover 700b.
  • the electromagnetic proportional valve 553 is connected to the branch flow passage 339 and the branch flow passage 369 and also connected to the flow passage 551a. Therefore, by using the solenoid proportional valve 553, the amount of pressure oil supplied from the pressure oil passage 330b to the pilot chamber 551 and the amount of pressure oil discharged from the pilot chamber 551 to the drain passage 360b can be controlled. Thus, the pilot pressure inside the pilot chamber 551 can be controlled.
  • the solenoid proportional valve 554 is connected to the branch flow channel 340 and the branch flow channel 370, and also connected to the flow channel 552a.
  • the solenoid proportional valve 554 it is possible to control the amount of pressure oil supplied from the pressure oil passage 330b to the pilot chamber 552 and the amount of pressure oil discharged from the pilot chamber 552 to the drain passage 360b.
  • the pilot pressure inside the pilot chamber 552 can be controlled.
  • the spool 555 inside the valve chamber 556 of the control valve 550 can be moved.
  • Electromagnetic proportional valves 563 and 564 are attached to the control valve 560 on the cover 700b.
  • the solenoid proportional valve 563 is connected to the branch flow channel 341 and the branch flow channel 371, and is also connected to the flow channel 561a and attached. Therefore, by using the solenoid proportional valve 563, it is possible to control the amount of pressure oil supplied from the pressure oil passage 330b to the pilot chamber 561 and the amount of pressure oil discharged from the pilot chamber 561 to the drain passage 360b. Thus, the pilot pressure inside the pilot chamber 561 can be controlled.
  • the solenoid proportional valve 564 is connected to the branch flow channel 342 and the branch flow channel 372 and also connected to the flow channel 562a to be attached.
  • the solenoid proportional valve 564 it is possible to control the amount of pressure oil supplied from the pressure oil passage 330b to the pilot chamber 562 and the amount of pressure oil discharged from the pilot chamber 562 to the drain passage 360b.
  • the pilot pressure inside pilot chamber 562 can be controlled.
  • the spool 565 inside the valve chamber 566 of the control valve 560 can be moved.
  • An electromagnetic proportional valve 573 is attached to the cover 700b of the control valve 570.
  • the electromagnetic proportional valve 573 is connected to the branch flow passage 343 and the branch flow passage 373, and also connected to the flow passage 571a and attached. Therefore, using the solenoid proportional valve 573, it is possible to control the amount of pressure oil supplied from the pressure oil passage 330b to the pilot chamber 571 and the amount of pressure oil discharged from the pilot chamber 571 to the drain passage 360b.
  • the pilot pressure inside the pilot chamber 571 can be controlled.
  • the spool 575 inside the valve chamber 576 for the control valve 570 can be moved.
  • the control valve 580 has electromagnetic proportional valves 583 and 584 attached to the cover 700b.
  • the solenoid proportional valve 583 is connected to the branch flow channel 344 and the branch flow channel 374, and also connected to the flow channel 581a and attached. Therefore, using the solenoid proportional valve 583, it is possible to control the amount of pressure oil supplied from the pressure oil passage 330b to the pilot chamber 581 and the amount of pressure oil discharged from the pilot chamber 581 to the drain passage 360b. Thus, the pilot pressure inside the pilot chamber 581 can be controlled. Further, the solenoid proportional valve 584 is connected to the branch flow channel 345 and the branch flow channel 375 and also connected to the flow channel 582a to be attached.
  • the solenoid proportional valve 584 it is possible to control the amount of pressure oil supplied from the pressure oil passage 330b to the pilot chamber 582 and the amount of pressure oil discharged from the pilot chamber 582 to the drain passage 360b.
  • the pilot pressure inside the pilot chamber 582 can be controlled.
  • the spool 585 inside the valve chamber 586 of the control valve 580 can be moved.
  • one of the solenoid proportional valves arranged two for each control valve is provided on one side of the housing 100. It is attached to the placed cover 700. That is, the solenoid proportional valve is provided only on one side of the spool in each of the control valves 510 to 580.
  • the control valve 510 uses an electromagnetic proportional valve 514 to control the pilot pressure inside the pilot chamber 512 on the other side of the spool. Therefore, in this embodiment, the flow path 512a connected between the solenoid proportional valve 514 and the pilot chamber 512 is formed so as to penetrate the inside of the housing 100 in the D3 direction that is the same as the axial direction of the spool. ..
  • the pressure oil in the pressure oil flow passage 330a is supplied to the inside of the pilot chamber 512 through the flow passage 512a that crosses the housing 100, and the pressure oil inside the pilot chamber 512 passes through the flow passage 512a and the drain flow passage. It is discharged to 360a.
  • the solenoid proportional valve 514 is used to control the direction and flow rate of the pressure oil flowing through the inside of the flow path 512a that crosses the housing 100 in the D3 direction (FIG. 4).
  • pressure oil inside the pilot chamber 522 is supplied and discharged through a flow path 522a that crosses the housing 100 in the D3 direction.
  • the pressure oil inside the pilot chamber 532 is supplied and discharged through a port 532a that traverses the housing 100 in the D3 direction.
  • the pressure oil inside the pilot chamber 542 is supplied and discharged through the flow path 542a that crosses the housing 100 in the D3 direction.
  • pressure oil inside the pilot chamber 552 is supplied and discharged through a flow passage 552a that crosses the housing 100 in the D3 direction.
  • control valve 560 pressure oil inside the pilot chamber 562 is supplied and discharged through a flow path 562a that crosses the housing 100 in the D3 direction.
  • control valve 570 the pressure oil inside the pilot chamber 571 is supplied and discharged through the flow path 571a that crosses the housing 100 in the D3 direction.
  • control valve 580 the pressure oil inside the pilot chamber 582 is supplied and discharged through the flow path 582a that crosses the housing 100 in the D3 direction.
  • FIG. 6 shows a cross-sectional view of the flow passages of a portion where the pressure oil passages 330a and 330b communicate with each other and a portion where the drain passages 360a and 360b communicate with each other.
  • the pressure oil flow passage 330a and the pressure oil flow passage 330b are communicated with each other at the end (the end on the control valve 510 side) in the direction opposite to the D1 direction shown in FIG. 5A. ..
  • the drain flow path 360a and the drain flow path 360b communicate with each other at the end portion in the direction opposite to the D1 direction shown in FIG.
  • the pressure oil flow passages 330a and 330b are the end portions in the direction opposite to the D1 direction in FIG. Has been changed.
  • the direction of the flow path is changed so as to face upward in FIG.
  • the pressure oil flow passages 330a and 330b extend upward, and inside the housing 100, the directions of the flow passages are further changed so as to face toward each other. Therefore, the pressure oil passages 330a, 330b, 330c are configured so that the pressure oil passages 330a, 330b communicate with each other in the pressure oil passage 330c inside the housing 100.
  • the drain flow passages 360a and 360b are end portions in the direction opposite to the D1 direction of FIG.
  • drain flow paths 360a and 360b extend upward and inside the housing 100, the directions of the flow paths are further changed so as to face toward each other. Therefore, the drain flow paths 360a, 360b, 360c are configured so that the drain flow paths 360a, 360b communicate with each other through the drain flow path 360c inside the housing 100.
  • the position where the pressure oil passages 330a and 330b communicate with each other and the position where the drain passages 360a and 360b communicate with each other are the same position in the D1 direction. Is.
  • the hydraulic excavator hydraulic drive device 2000 is provided with a hydraulic pump 200c for supplying pressure oil to the pressure oil passage 330.
  • a hydraulic pump 200c for supplying pressure oil to the pressure oil passage 330.
  • pressure oil is supplied from the control valve 580 to the control valve 550 in the pressure oil flow passage 330a, further flows into the pressure oil flow passage 330b, and the control valve 510 Is supplied to the control valve 540. Therefore, the pressure oil can be supplied toward the control valves 510 to 580.
  • the hydraulic drive device 2000 for a hydraulic excavator is configured such that the pressure oil in the pressure oil passage 330 is not supplied by the hydraulic pump 200c, but the pressure oil is supplied into the pressure oil passage 330 by another configuration.
  • a part of the pressure oil from the supply lines 310, 320 to which the pressure oil is supplied by the hydraulic pumps 200a, 200b shown in FIG. It may be used for supply.
  • the pressure of the pressure oil from the hydraulic pumps 200a and 200b is too high to be used for supplying the pressure oil in the pressure oil flow passage 330, the pressure of the pressure oil supplied in the pressure oil flow passage 330 is increased.
  • a configuration may be used to reduce
  • a pressure reducing valve may be used to reduce the pressure of the pressure oil supplied into the pressure oil passage 330.
  • FIG. 7 illustrates a configuration in which the hydraulic pump 200c is not used, but instead a part of the pressure oil from the supply lines 310 and 320 to which the pressure oil is supplied by the hydraulic pumps 200a and 200b is guided to the pressure oil flow passage 330.
  • a sectional view of the housing 100a and the flow path of the pressure oil is shown.
  • a cover 800 is attached to the housing 100a shown in FIG. Inside the cover 800, a flow path 810 communicating with the pressure oil flow path 330a and through which the pressure oil flows, a pressure reducing valve 820 connected to the flow path 810 and capable of reducing the pressure of the pressure oil flowing therethrough, A flow path 830 is provided which is connected to the pressure reducing valve 820 and through which pressure oil flows.
  • the flow path 830 is connected to, for example, the supply line 310, and a part of the pressure oil flowing through the supply line 310 is supplied to the flow path 830.
  • the pressure oil supplied from the supply line 310 to the flow path 830 is supplied to the flow path 810 via the pressure reducing valve 820 and is supplied to the pressure oil flow path 330a. Since the pressure oil flowing inside the supply line 310 has a higher pressure than the pressure oil flowing inside the pressure oil passage 330a, the pressure oil inside the supply line 310 cannot be used as it is. In the configuration of FIG. 7, since the pressure oil from the supply line 310 is supplied to the pressure oil passage 330a via the pressure reducing valve 820, the pressure of the pressure oil in the passage 330a can be reduced to an appropriate pressure. Therefore, the pressure oil having an appropriate pressure can be supplied to the pressure oil channel 330a.
  • the pressure oil pump 200c can be omitted. As a result, the number of pressure oil pumps can be reduced. Therefore, the manufacturing cost of the hydraulic drive system 2000 for a hydraulic excavator can be kept low.
  • the flow path 830 is connected to the supply line 310, the flow path 830 may be connected to the supply line 320.
  • the pressure oil may be introduced from another configuration. At that time, a configuration for appropriately adjusting the pressure of the pressure oil before being supplied to the pressure oil passage 330 may be used.
  • the configuration for appropriately adjusting the pressure of the pressure oil need not be the pressure reducing valve, and may be another configuration. At that time, not only the structure for reducing the pressure but also the structure for increasing the pressure may be used.
  • FIG. 8 shows a schematic side view of the multi-control valve unit 1000 and the hydraulic excavator 3000 when the multi-control valve unit 1000 is mounted on the hydraulic excavator 3000.
  • the multi-control valve unit 1000 is arranged such that the axial direction of the spool is along the direction of gravity so as to facilitate maintenance.
  • the multi-control valve unit 1000 is often arranged at the rear of the cabin because of the arrangement position of other configurations. Therefore, in the present embodiment, as shown in FIG. 8, the multi-control valve unit 1000 is mounted on the hydraulic excavator 3000 at a position behind the cabin with the cover 700 and the solenoid proportional valve positioned downward.
  • all solenoid proportional valves are provided on one side of the spool.
  • the solenoid proportional valve is provided only at a position below the spool. Therefore, as shown in FIG. 8, when the multi-control valve unit 1000 is mounted on the hydraulic excavator 3000 so that the upper portion of the multi-control valve unit 1000 is exposed to the outside, the electromagnetic proportional valve is exposed to the outside. Can be suppressed. In particular, it is possible to prevent the solenoid proportional valve from being exposed to the outside at the upper part of the hydraulic excavator 3000.
  • the electromagnetic proportional valves of the multi-control valve unit 1000 are installed on both sides in the axial direction of the spool, the electromagnetic proportional valves will also be installed on the upper side of the multi-control valve unit 1000. At that time, the upper portion of the multi-control valve unit is exposed to the outside, and the solenoid proportional valve is attached thereto, so that the solenoid proportional valve is exposed to the outside.
  • the solenoid proportional valve when the solenoid proportional valve is exposed to the outside at the upper part of the hydraulic excavator 3000, the driver walks on the hydraulic excavator 3000 when getting on the hydraulic excavator or performing maintenance on the hydraulic excavator 3000. There is a possibility of collision between the driver and the solenoid proportional valve at that time. When a collision occurs, the solenoid proportional valve is relatively prone to failure. Therefore, a collision of the solenoid proportional valve and the driver may cause a failure of the solenoid proportional valve.
  • the solenoid proportional valve can be arranged only on one side of the multi-control valve unit 1000, the multi-control valve unit 1000 shown in FIG. It can only be placed in the lower position. Therefore, the solenoid proportional valve is housed inside the hydraulic excavator 3000 and can be prevented from being exposed to the outside above the hydraulic excavator 3000. Therefore, it is possible to prevent the collision between the solenoid proportional valve and the driver.
  • the solenoid proportional valve originally arranged at the upper position in the axial direction of the spool in the multi-control valve unit 1000 so as to further project upward in the axial direction of the spool is originally a lower valve. It is arranged at a position overlapping with the position where the solenoid proportional valve on the side was arranged. Therefore, in the multi-control valve unit 1000, the length of the portion protruding upward in the axial direction of the spool can be reduced. That is, it is possible to reduce the length of the portion that protrudes upward from the housing 100 in the axial direction of the spool. As a result, the length of the multi-control valve unit 1000 along the axial direction of the spool can be reduced, and the multi-control valve unit 1000 can be downsized.
  • the multi-control valve unit 1000 all the electromagnetic proportional valves are provided only on one side with respect to the spool, so there is a space in the other side of the multi-control valve unit 1000. That is, on the other side opposite to the one side where the electromagnetic proportional valve is attached to the housing 100 via the cover 700, there is a space in the space corresponding to the removal of the electromagnetic proportional valve. Therefore, an additional configuration can be added to the space.
  • a sensor that can detect the position of the spool can be attached to the space. Since the position of the spool in each control valve can be detected by the sensor, the operating condition of the device in the multi-control valve unit 1000 can be managed by managing the position of the spool. Therefore, by using the operation status data of the multi-control valve unit 1000, the control of the multi-control valve unit 1000 can be performed over a wider range.
  • the solenoid proportional valve since the solenoid proportional valve is provided only on one side of the spool, the positional relationship between the solenoid proportional valve and the spool is the same for all spools. become.
  • all the solenoid proportional valves control the pilot pressure in the pilot chamber from a position lower than the spool, thereby controlling the balance of the pilot pressures in the two pilot chambers to prevent the spool from moving. Control.
  • the secondary pressure characteristics of the solenoid proportional valves can be made uniform among all the solenoid proportional valves. Since the secondary pressure characteristics among all the solenoid proportional valves are made uniform, it is not necessary to adjust the secondary pressure for moving the spool for each solenoid proportional valve.
  • the pressure oil flow passage 330a is formed in the cover 700a, and the pressure oil flow passage 330a is provided in each of the pilot chambers (first pilot chambers) on one side of the four control valves 510 to 540. And the pilot chamber (second pilot chamber) on the other side. Therefore, in the cover 700a, the pressure oil passage 330a can be commonly used between the four control valves 510 to 540. This makes it possible to simplify the flow path configuration of the pressure oil flow path 330a between the four control valves 510 to 540, and to simplify the configuration of the multi-control valve unit 1000. Therefore, the multi-control valve unit 1000 can be downsized, and the manufacturing cost of the multi-control valve unit 1000 can be reduced.
  • a pressure oil flow passage 330b is formed in the cover 700b, and the pressure oil flow passage 330b is provided in each of the four control valves 550 to 580 on one side of the pilot chamber (first pilot chamber) and on the other side. It communicates with each of the pilot chambers (second pilot chamber). Therefore, in the cover 700b, the pressure oil passage 330b can be commonly used among the four control valves 550 to 580. This makes it possible to simplify the flow path configuration of the pressure oil flow path 330b between the four control valves 550 to 580, and to simplify the configuration of the multi-control valve unit 1000. Therefore, the multi-control valve unit 1000 can be further downsized, and the manufacturing cost of the multi-control valve unit 1000 can be further reduced.
  • the four valve chambers are arranged in the D1 direction orthogonal to the axial direction of the spool between the four control valves 510 to 540, and the pressure oil flow passage 330a is located inside the cover 700a. It is formed so as to extend in the direction. Therefore, the direction in which the four valve chambers are arranged inside the cover 700a is the same as the direction in which the pressure oil passage 330a extends.
  • the pressure oil passage 330a is formed to extend in the same direction as the direction in which the four valve chambers are arranged inside the cover 700a, the structure of the pressure oil passage 330a can be simplified. Therefore, the configuration of the multi-control valve unit 1000 can be simplified. Further, the pressure oil passage 330b is also formed inside the cover 700b so as to extend in the same direction as the direction in which the four valve chambers are arranged. Therefore, the structure of the pressure oil passage 330b can be simplified. You can Therefore, the configuration of the multi-control valve unit 1000 can be simplified.
  • valve chambers are arranged in the D1 direction, and two valve chambers are arranged in the D2 direction intersecting the D1 direction.
  • the oil flow paths 330a and 330b are in communication with each other. Since the pressure oil flow passages 330a and 330b communicate with each other, the number of pressure oil flow passages 330a and 330b can be reduced, and the flow passage configuration inside the multi-control valve unit 1000 can be further simplified. ..
  • the pressure oil flow passage 330 is formed by one flow passage. Therefore, the number of pipes connected to the pressure oil passage 330 for supplying oil to the pressure oil passage 330 can be reduced. If the pressure oil passage is provided for each control valve, it is necessary to provide a pipe connected to the pressure oil passage for supplying oil to the pressure oil passage for each pressure oil passage. Therefore, the number of pipes connected to the pressure oil flow path increases, which may complicate the configuration of the pipes.
  • the drain flow passage 360a is provided in the cover 700a, and the drain flow passage 360a is provided at each of the drain ports for guiding the pressure oil to the tank in the four valve chambers of the control valves 510 to 540. It is in communication. Therefore, in the cover 700a, the drain flow path 360a can be commonly used between the four control valves 510 to 540.
  • the multi-control valve unit 1000 can be downsized, and the manufacturing cost of the multi-control valve unit 1000 can be reduced.
  • the four valve chambers are arranged in the D1 direction orthogonal to the axial direction of the spool between the four control valves 510 to 540, and the drain passage 360a has the D1 direction inside the cover 700a. Is formed to extend. Therefore, the direction in which the four valve chambers are arranged inside the cover 700a is the same as the direction in which the drain passage 360a extends.
  • the drain passage 360a is formed inside the cover 700a so as to extend in the same direction as the direction in which the four valve chambers are arranged, the structure of the drain passage 360a can be simplified. Therefore, the configuration of the multi-control valve unit 1000 can be simplified. Also, the drain flow path 360b is formed to extend in the same direction as the direction in which the four valve chambers are arranged inside the cover 700b, so that the configuration of the drain flow path 360b can be simplified. .. Therefore, the configuration of the multi-control valve unit 1000 can be simplified.
  • a valve chamber row in which four valve chambers are arranged in the D1 direction is arranged in two in the D2 direction that intersects the D1 direction, and a drain provided for each valve chamber row
  • the flow paths 360a and 360b are in communication with each other. Since the drain flow paths 360a and 360b are in communication with each other, the number of drain flow paths 360a and 360b can be reduced, and the flow path configuration inside the multi-control valve unit 1000 can be simplified.
  • the drain flow path 360 is formed by one flow path. Therefore, it is possible to reduce the number of pipes connected to the drain passage 360 for guiding the oil discharged from each of the control valves 510 to 580 to the tank 300a. If the drain passage is provided separately for each control valve, it is necessary to provide a pipe connected to the drain passage for guiding the oil discharged from the control valve to the tank. .. Therefore, the number of pipes connected to the drain flow path increases, which may complicate the configuration of the pipes.
  • the respective flow paths are configured such that the pressure oil flow path 330a and the drain flow path 360a extend in the same direction. Therefore, the flow path structure inside the cover 700a can be simplified.
  • the respective flow passages are configured so that the pressure oil flow passage 330b and the drain flow passage 360b extend in the same direction. Therefore, the flow path configuration inside the cover 700b can be simplified.
  • the hydraulic excavator 3000 is configured to control the drive of the actuator using the multi-control valve unit 1000 described above.
  • the multi-control valve unit 1000 is arranged at a position behind the cabin so that one side where the solenoid proportional valve is arranged is located below the spool in the direction of gravity.
  • the configuration of the hydraulic excavator 3000 can be simplified. Therefore, the manufacturing cost of the hydraulic excavator 3000 can be suppressed, and the hydraulic excavator 3000 can be downsized.
  • the solenoid proportional valve is housed inside and protected by the hydraulic excavator 3000, the solenoid proportional valve can be prevented from malfunctioning, and a highly reliable hydraulic excavator can be provided. ..
  • the configuration in which the direction in which the plurality of valve chambers of the control valves 510 to 540 are arranged is the same as the direction in which the pressure oil flow passage 330a extends inside the cover 700a has been described.
  • the invention is not limited to the above embodiment.
  • the direction in which the plurality of valve chambers of the control valves 510 to 540 are arranged may be different from the direction in which the pressure oil flow path 330a extends.
  • the direction in which the plurality of valve chambers in the control valves 550 to 580 are arranged may be different from the direction in which the pressure oil flow passage 330b extends inside the cover 700b.
  • the present invention is not limited to the above embodiment.
  • the position where the pressure oil flow passage 330a and the pressure oil flow passage 330b communicate with each other may be outside the housing 100.
  • a common cover that covers one side of the spool is provided in the housing, and the pressure oil flow communicating with the control valves 510 to 540 is provided inside the common cover.
  • the passage 330a and the pressure oil passage 330b communicating with the control valves 550 to 580 may be in communication with each other.
  • the pressure oil flow passage 330a formed inside the cover 700a and the pressure oil flow passage 330b formed inside the cover 700b are in a direction opposite to the D1 direction in each cover 700.
  • the position where the pressure oil flow passage 330a and the pressure oil flow passage 330b communicate with each other may not be the end portion in the direction opposite to the D1 direction.
  • the pressure oil flow passage 330a and the pressure oil flow passage 330b may be configured to communicate with each other at a position between a plurality of control valves arranged in the D1 direction.
  • the pressure oil flow passage 330a and the pressure oil flow passage 330b do not necessarily need to communicate with each other. If the pressure oil flow passages are commonly used for one row of control valves to simplify the flow passage structure for the pressure oil flow passages, the pressure oil flow passages formed for each row do not necessarily communicate with each other. You don't have to.
  • the mode in which the direction in which the plurality of valve chambers in the control valves 510 to 540 are arranged and the direction in which the drain passage 360a extends inside the cover 700a are the same direction has been described. Is not limited to the above embodiment.
  • the direction in which the plurality of valve chambers of the control valves 510 to 540 are arranged may be different from the direction in which the drain passage 360a extends.
  • the direction in which the plurality of valve chambers in the control valves 550 to 580 are arranged may be different from the direction in which the drain passage 360b extends inside the cover 700b.
  • the drain channel 360a formed inside the cover 700a and the drain channel 360b formed inside the cover 700b communicate with each other inside the housing 100.
  • the invention is not limited to the above embodiment.
  • the position where the drain passage 360a and the drain passage 360b communicate with each other may be outside the housing 100.
  • the drain channel 360a formed inside the cover 700a and the drain channel 360b formed inside the cover 700b have end portions in the opposite direction to the D1 direction in each cover 700.
  • the present invention is not limited to the above-described embodiment.
  • the position where the drain passage 360a and the drain passage 360b communicate with each other does not have to be the end portion in the direction opposite to the D1 direction. Further, the drain passage 360a and the drain passage 360b do not necessarily need to communicate with each other.
  • the pressure oil flow paths 330a and 330b and the drain flow paths 360a and 360b extend in the same direction.
  • the pressure oil flow paths 330a and 330b and the drain flow paths 360a and 360b may extend in different directions.
  • the pressure oil passage 330a and the drain passage 360a are formed in the same cover 700a, and the pressure oil passage 330b and the drain passage 360b are formed in the same cover 700b.
  • the present invention is not limited to the above embodiment.
  • the pressure oil flow path and the drain flow path may be formed on different members.
  • the pressure 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. By connecting the flow path to the port of each control valve, pressure oil is supplied to each control valve.
  • the present invention is not limited to the above-described embodiment, and the pressure oil supplied from the hydraulic pumps 200a and 200b is configured to be supplied to each control valve through the flow paths other than the supply lines 310 and 320. Good.
  • the pressure oil may be supplied to each control valve through the center bypass line where the pressure oil is directly supplied from the hydraulic pumps 200a and 200b to each control valve.
  • a pressure oil passage as a center bypass line may be configured so that pressure oil is supplied to each control valve from the hydraulic pump 200a through the control valves 510 to 540 in order. Further, a flow path of pressure oil as a center bypass line may be configured so that pressure oil is supplied to each control valve from the hydraulic pump 200b through the control valves 550 to 580 in order.
  • control valve for controlling the drive of the boom, the arm and the bucket and the control valve for controlling the drive of the hydraulic motor for the turning operation and the traveling drive of the cabin are provided inside the housing 100.
  • the respective configurations provided have been described.
  • the actuator whose drive 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 above actuators.
  • a multi-control valve unit having a control valve that drives an actuator of a type not used in this embodiment may be used.
  • valve chamber row configured by arranging the four valve chambers and the spool in rows and the two rows of spools are arranged inside the housing 100.
  • present invention is not limited to the above embodiment.
  • the number of valve chambers and spools forming the row of valve chambers and the row of spools need not be four. The number may be five or more, or may be three or less.
  • the construction machine in which the multi-control valve unit 1000 is mounted is described as a hydraulic excavator, but the present invention is not limited to the above-described embodiment.
  • the construction machine equipped with the multi-control valve unit of the present invention may be another type of construction machine such as a hydraulic crane.
  • one of the plurality of control valves in the multi-control valve unit 1000 is provided with one solenoid proportional valve and the other control valves are provided with two electromagnetic proportional valves.
  • An electromagnetic proportional valve is provided. Therefore, in the present embodiment, some control valves of the plurality of control valves are provided with the first proportional valve and the second proportional valve, and both the first proportional valve and the second proportional valve are on one side. It has the structure provided in the cover arranged at. Thus, only some control valves of the plurality of control valves are provided with the first proportional valve and the second proportional valve, and both the first proportional valve and the second proportional valve are arranged on one side.
  • the present invention also includes a multi-control valve unit having a structure provided in the cover.
  • a multi-control valve unit having a structure provided in the cover.
  • the multi-control valve unit only some control valves of the plurality of control valves are provided with the first proportional valve and the second proportional valve, and the first proportional valve and the second proportional valve are provided.
  • the configuration in which the cover is disposed on one side is provided has been described, but the present invention is not limited to the above-described embodiment.
  • all control valves include a first proportional valve and a second proportional valve, and both the first proportional valve and the second proportional valve are arranged on one side.
  • the cover may be provided on the cover.

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

Abstract

L'invention concerne une machine de construction et une unité de soupape à commande multiple présentant une configuration simple. L'unité de soupape à commande multiple comprend : une pluralité de premières chambres pilotes ; une pluralité de secondes chambres pilotes ; un canal d'écoulement d'huile sous pression qui est formé dans un premier élément de formation de chambre pilote et à travers lequel de l'huile sous pression devant être fournie aux premières chambres pilotes et aux secondes chambres pilotes est mise en circulation ; une pluralité de premières vannes proportionnelles qui règlent l'huile sous pression devant être fournie par le canal d'écoulement d'huile sous pression aux premières chambres pilotes respectives ; une pluralité de secondes vannes proportionnelles qui règlent l'huile sous pression devant être fournie par le canal d'écoulement d'huile sous pression aux secondes chambres pilotes respectives ; une pluralité de premiers canaux d'écoulement pilote à travers lesquels l'huile sous pression est mise en circulation entre les premières vannes proportionnelles et les premières chambres pilotes respectives ; et une pluralité de seconds canaux d'écoulement pilote à travers lesquels l'huile sous pression est mise en circulation entre les secondes vannes proportionnelles et les secondes chambres pilotes respectives.
PCT/JP2020/005282 2019-02-14 2020-02-12 Unité de soupape à commande multiple et machine de construction WO2020166591A1 (fr)

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JP2023130534A (ja) 2020-08-06 2023-09-21 シャープ株式会社 端末装置、基地局装置、方法、および、集積回路
JP2023178723A (ja) * 2022-06-06 2023-12-18 カヤバ株式会社 制御弁

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH054185A (ja) * 1991-06-28 1993-01-14 Smc Corp 真空供給装置
JP2018017347A (ja) * 2016-07-28 2018-02-01 キャタピラー エス エー アール エル 弁装置およびこれを備えた流体圧システム

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KR102169315B1 (ko) * 2014-05-23 2020-10-23 두산인프라코어 주식회사 건설기계를 위한 파일럿 신호용 블록 조립체 및 이를 갖는 컨트롤 밸브 조립체
CN204099328U (zh) * 2014-08-12 2015-01-14 徐工集团工程机械股份有限公司 一种比例多路阀的先导装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH054185A (ja) * 1991-06-28 1993-01-14 Smc Corp 真空供給装置
JP2018017347A (ja) * 2016-07-28 2018-02-01 キャタピラー エス エー アール エル 弁装置およびこれを備えた流体圧システム

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CN113383168B (zh) 2023-12-08

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