WO2012060331A1 - Dispositif à commande hydraulique pour machine de construction - Google Patents

Dispositif à commande hydraulique pour machine de construction Download PDF

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Publication number
WO2012060331A1
WO2012060331A1 PCT/JP2011/075078 JP2011075078W WO2012060331A1 WO 2012060331 A1 WO2012060331 A1 WO 2012060331A1 JP 2011075078 W JP2011075078 W JP 2011075078W WO 2012060331 A1 WO2012060331 A1 WO 2012060331A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
oil
filter
pressure
drive device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/075078
Other languages
English (en)
Japanese (ja)
Inventor
小高　克明
優太 中村
征勲 茅根
一村　和弘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to EP11837981.7A priority Critical patent/EP2636910B1/fr
Priority to KR1020137011676A priority patent/KR101850570B1/ko
Priority to CN201180053096.2A priority patent/CN103201523B/zh
Publication of WO2012060331A1 publication Critical patent/WO2012060331A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/225—Control of steering, e.g. for hydraulic motors driving the vehicle tracks
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/615—Filtering means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/625—Accumulators

Definitions

  • the present invention relates to a hydraulic drive device for a work machine that is provided in a work machine such as a wheel excavator and includes a filter that collects dust mixed in oil flowing through an oil passage.
  • Patent Document 1 There is one described in Patent Document 1 as this type of prior art.
  • the prior art disclosed in Patent Document 1 is provided in an oil passage upstream of a hydraulic circuit to which pressure oil discharged from a hydraulic pump is supplied, and collects dust mixed in the oil discharged from the hydraulic pump.
  • a check and a non-return check that is arranged in the oil passage so as to be juxtaposed with the filter, allows the oil flow from the hydraulic pump side to the hydraulic circuit side, and prevents the oil flow from the hydraulic circuit side to the hydraulic pump side.
  • a configuration with a valve is shown.
  • the above-described prior art is a filter provided on the upstream side of the hydraulic pump, but a filter provided in the hydraulic circuit on the downstream side of the hydraulic pump is also known in the past. That is, the hydraulic circuit on the downstream side of the hydraulic pump is provided with a valve body and a relief valve that regulates the maximum switching pressure of the valve body, and the oil passage is connected to the oil passage that connects the valve body and the relief valve.
  • a configuration including a filter that collects dust flowing through the pipe is also known. What was comprised in this way can implement
  • a relief valve is provided between the valve body and the filter, and when the oil passage portion connecting the valve body and the filter becomes high pressure, the high pressure is reduced. It is conceivable to configure the relief valve to escape.
  • the relief valve is generally expensive, if the relief valve is provided in this way, there is a problem that the manufacturing cost of the hydraulic drive device increases.
  • the present invention has been made from the actual state in the above-described prior art, and its purpose is to provide the valve body and the filter even when the filter disposed in the oil passage connecting the valve body and the relief valve is clogged. It is an object of the present invention to provide a hydraulic drive device for a work machine that can guide high-pressure oil in an oil passage portion that communicates to a relief valve with a relatively inexpensive structure.
  • a hydraulic drive device for a work machine includes a hydraulic pump, a valve body that is switched according to pressure oil discharged from the hydraulic pump, and a maximum switching pressure of the valve body.
  • a hydraulic drive device for a work machine including a relief valve that regulates pressure and a filter provided in an oil passage that communicates the valve body and the relief valve, the oil passage is provided in parallel with the filter, A check valve is provided which allows oil to flow from the valve body side to the relief valve side and prevents oil flow from the relief valve side to the valve body side.
  • the present invention configured in this manner causes clogging in the filter disposed in the oil passage that connects the valve body and the relief valve, and when the oil passage portion that connects the valve body and the filter becomes high pressure, the filter
  • the oil is led to the relief valve through a relatively inexpensive check valve arranged in parallel to the relief valve, that is, generally a check valve that is less expensive than a relief valve, etc. Can escape.
  • a high pressure is not confined in the oil passage portion, and damage to the entire hydraulic circuit including the oil passage and the valve body can be prevented.
  • the hydraulic drive device for a work machine includes, in the above invention, a valve to which pressure oil discharged from the hydraulic pump is supplied, and in the valve, the valve body, the relief valve, and the oil A passage, the filter, and the check valve are provided.
  • the hydraulic drive device for a work machine includes, in the above invention, a brake valve and an accumulator capable of supplying pressure oil to the brake valve, and the valve can supply pressure oil to the accumulator. It is characterized by comprising a charge valve, wherein the valve element is composed of an on-off valve capable of releasing the high pressure oil when the accumulated pressure of the accumulator becomes higher than a predetermined pressure.
  • a hydraulic drive device for a work machine is the above-described invention, wherein the work machine includes a wheel excavator, and includes a priority valve and a steering valve to which pressure oil discharged from the hydraulic pump is supplied, An oil passage for introducing pressure oil to the charge valve via the priority valve is provided, another filter is provided in another oil passage connecting the hydraulic pump and the priority valve, and the other oil passage is provided with the other oil passage.
  • a check valve is arranged in parallel with the filter to allow the oil flow from the hydraulic pump side to the priority valve side and to block the oil flow from the priority valve side to the hydraulic pump side. It is a feature.
  • the present invention is provided with a filter in the oil passage connecting the valve body and the relief valve, and allows the oil to flow from the valve body side to the relief valve side in parallel with the filter in the above oil passage. Since a check valve is provided to block the flow of oil from the relief valve side to the valve body side, even if the filter is clogged, the valve body and the filter are connected via a relatively inexpensive check valve. The high-pressure oil in the communicating oil passage can be guided to the relief valve. Thereby, it is possible to prevent damage to the entire hydraulic circuit while suppressing an increase in the manufacturing cost of the hydraulic drive device including the oil passage and the valve body, and it is possible to realize excellent protection of the hydraulic circuit at a low cost. .
  • FIG. 1 It is a side view which shows the wheel shovel mentioned as an example of the working machine with which the hydraulic drive device which concerns on this invention is provided. It is a hydraulic circuit diagram which shows the hydraulic drive device which concerns on this embodiment with which the wheel shovel shown in FIG. 1 is equipped.
  • the work machine provided with the hydraulic drive device is, for example, a wheel excavator.
  • the wheel excavator includes a traveling body 1 having a front wheel 2 and a rear wheel 3, a revolving body 4 disposed on the traveling body 1, and the revolving body 4 can be rotated in the vertical direction.
  • the working device 5 includes a boom 6 that is rotatably provided on the revolving body 4, an arm 7 that is rotatably provided at the tip of the boom 6, and a bucket 8 that is rotatably provided at the tip of the arm 7. Is included.
  • a driver's cab 9 is disposed at the front position on the revolving structure 4 and a counterweight 10 is disposed at the rear position.
  • a machine room 11 is disposed between the cab 9 and the counterweight 11, and the main part of the hydraulic drive device according to the present embodiment is accommodated in the machine room 11.
  • the hydraulic drive apparatus includes a hydraulic pump 20, a priority valve 21 connected to the hydraulic pump 20, and an operation of a steering wheel (not shown) connected to the priority valve 21. And a steering valve 22 for supplying pressure oil to a steering cylinder (not shown).
  • the brake valve 23 for supplying pressure oil for braking the front wheel 2 and the rear wheel 3 to a brake device (not shown) according to the depression operation of the brake pedal 23 a disposed in the cab 9, and the front wheel 2 and the rear wheel 3
  • a valve 25 for supplying pressure oil for braking the front wheel 2 and the rear wheel 3 to a brake device (not shown) according to the depression operation of the brake pedal 23 a disposed in the cab 9, and the front wheel 2 and the rear wheel 3
  • a pair of accumulators 24 corresponding to the respective accumulators 24 for accumulating pressure oil supplied to the brake valve 23, and a charge capable of supplying pressure oil to the accumulator 24, connected to the above-described priority valve 21 via an oil passage 26.
  • a valve 25 for supplying pressure oil
  • An oil passage 38 that connects the hydraulic pump 20 and the priority valve 21 includes a filter 28 that collects dust mixed in the pressure oil flowing through the oil passage 38, and a pressure from the hydraulic pump 20 side to the priority valve 21 side.
  • a check valve 29 that allows oil flow and blocks oil flow from the priority valve 21 side to the hydraulic pump 20 side is provided in parallel.
  • the priority valve 21 described above is a neutral position 21a1 which is a switching position where pressure oil can be supplied to the accumulator 24, and an operation position 21a2 which is a switching position where pressure oil is supplied to the steering valve 23 in response to an operation of a steering wheel (not shown). And a relief valve 21b that regulates the maximum switching pressure of the direction switching valve 21a.
  • the relief valve 21 b is connected to the tank 27.
  • the steering valve 22 described above includes a pump unit 22b that supplies pressure oil to a steering cylinder (not shown), and a direction switching valve that controls the flow of pressure oil supplied to the pump unit 22b via the direction switching valve 21a of the priority valve 21. 22a.
  • the direction switching valve 22a includes a switching position 22a1 that enables supply of pressure oil that normally rotates the pump portion 22b, a switching position 22a2 that enables supply of pressure oil that reversely rotates the pump portion 22b, and pressure oil to the pump portion 22b. And a neutral position 22a3 for preventing the supply of.
  • the charge valve 25 described above enables the supply of pressure oil to each of the accumulators 24, and checks the flow of pressure oil from the accumulator 24 side, and check valves 30, 31 direction. And a check valve 32 that prevents the flow of pressure oil from the check valves 30 and 31 side.
  • the charge valve 25 is held at the closed position 33a when the pressure of the accumulator 24 is low, and is switched to the open position 33b when the pressure of the accumulator 24 is increased to a predetermined pressure, that is, the on-off valve 33; And a relief valve 34 that regulates the maximum switching pressure of the on-off valve 33.
  • the on-off valve 33 and the relief valve 34 are connected to the tank 27.
  • the charge valve 25 includes a filter 36 that is provided in an oil passage 35 that connects the open / close valve 33 and the relief valve 34 and collects dust mixed in the pressure oil flowing through the oil passage 35. Furthermore, in the present embodiment, the charge valve 25 is arranged in parallel with the filter 36 in the oil passage 35 described above to allow the flow of pressure oil from the on-off valve 33 side to the relief valve 34 side, and from the relief valve 34 side. A check valve 37 that prevents the flow of pressure oil toward the on-off valve 33 is included. Such a check valve 37 is generally known to be less expensive than a relief valve or the like.
  • oil passage 26 connecting the priority valve 21 and the charge valve 25 described above has one end connected to the outlet port of the direction switching valve 21a of the priority valve 21 and the other end opened and closed with the check valve 32 of the charge valve 25.
  • An oil passage communicating with the valve 33 is connected.
  • the direction switching valve 22a of the steering valve 22a is switched to one of the switching positions 22a1 and 22a2, and the direction of the priority valve 21 is changed.
  • the switching valve 21a tends to be switched to the operation position 21a side. Accordingly, a considerable amount of the pressure oil discharged from the hydraulic pump 20 passes through the filter 28, the operation position 21a2 of the direction switching valve 21a of the priority valve 21, and the switching position 22a1 or the switching position 22a2 of the direction switching valve 22a of the steering valve 22. Then, it is supplied to the pump part 22b, and further supplied from the pump part 22b to a steering cylinder (not shown). Thereby, the traveling direction of the traveling body 1 is determined.
  • the direction switching valve 21a1 of the priority valve 21 is held at the neutral position 21a1. Accordingly, the pressure oil discharged from the hydraulic pump 20 is supplied to the charge valve 25 via the switching position 21 a 1 of the direction switching valve 21 a 1 of the priority valve 21 and the oil passage 26. At this time, if the accumulated pressure of the accumulator 24 is less than the predetermined pressure, the on-off valve 33 is held at the closed position 33a, and the hydraulic oil of the hydraulic pump 20 is supplied with the check valve 32 and the check valves 30, 31. To each of the accumulators 24.
  • the on-off valve 33 is switched to the open position 33b by the switching pressure applied to the oil passage 35 portion located between the on-off valve 33 and the filter 36.
  • high pressure oil exceeding a predetermined pressure is released to the tank 27 through the open position 33 b of the on-off valve 33.
  • the switching pressure exceeds the set pressure of the relief valve 34, the relief valve 34 is activated, and high pressure oil exceeding the set pressure is released to the tank 26 via the filter 36 and the relief valve 34.
  • the dust mixed in the pressure oil flowing through the oil passage 38 is collected by the filter 28 provided in the oil passage 38 connected to the hydraulic pump 20, and the hydraulic pump 20, the priority valve 21, the pressure oil flowing upstream of the hydraulic circuit including the steering valve 22, the charge valve 25, the accumulator 24, the brake valve 23, and the like is cleaned. Further, dust mixed in the pressure oil flowing in the oil passage 35 is collected by a filter 36 provided in the oil passage 35 that connects the on-off valve 33 and the relief valve 34 of the charge valve 25, and downstream of the hydraulic circuit. The pressure oil flowing through is cleaned. That is, the pressure oil flowing through this hydraulic circuit is kept clean by the filter 28 and the filter 36, and the good operating performance of each hydraulic device including the priority valve 21, the steering valve 22, the charge valve 25, the brake valve 23, etc. Maintained.
  • the filter 36 disposed in the oil passage 35 that connects the on-off valve 33 and the relief valve 34 is clogged, and the oil passage that connects the on-off valve 33 and the filter 36.
  • the portion 35 becomes high pressure pressure oil is supplied to the relief valve 34 via a relatively inexpensive check valve provided in parallel with the filter 36, that is, a check valve 37 that is generally less expensive than a relief valve or the like.
  • the operation of the relief valve 34 allows high pressure oil to escape.
  • the pressure oil cleaning function by the filter 36 declines as described above, the entire hydraulic circuit is damaged while suppressing an increase in the manufacturing cost of the hydraulic drive device including the oil passage 35 and the on-off valve 33. Therefore, excellent protection of the hydraulic circuit can be realized at low cost.
  • the filter 36 and the check valve 37 are arranged in parallel to the oil passage 35 that connects the on-off valve 33 and the relief valve 34 included in the charge valve 25.
  • the priority valve A filter and a check valve may be arranged in parallel in an oil passage that connects the direction switching valve 21a and the relief valve 21b.
  • this invention is not limited that a working machine is a wheel excavator.

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

Abstract

Le problème à résoudre dans le cadre de cette invention est de faire en sorte que, même si un filtre disposé dans un trajet d'huile permettant de relier une soupape et une soupape de décharge se bouche, l'huile à haute pression dans une partie du trajet d'huile, la partie reliant la soupape et le filtre, puisse être amenée jusqu'à la soupape de décharge au moyen d'une structure relativement bon marché. Selon la présente invention, la solution consiste en une pompe hydraulique (20); et une soupape de charge (25) vers laquelle l'huile comprimée provenant de la pompe hydraulique (20) est distribuée dans un trajet d'huile (26). La soupape de charge (25) comprend une soupape, telle qu'une soupape tout-ou-rien (33), commutée par l'huile comprimée déchargée de la pompe hydraulique (20); une soupape de décharge (34) permettant de déterminer la valeur maximale de la pression pour commuter la soupape tout-ou-rien (33); et un filtre (36) disposé dans le trajet d'huile (35) pour relier la soupape tout-ou-rien (33) et la soupape de décharge (34). Le trajet d'huile (35) est doté d'une soupape à clapet (37) qui est disposée parallèlement au filtre (36), permet l'écoulement de l'huile comprimée à partir du côté de la soupape tout-ou-rien (33) vers le côté de la soupape de décharge (34), et bloque l'écoulement de l'huile comprimée depuis le côté de la soupape de décharge (34) vers le côté de la soupape tout-ou-rien (33).
PCT/JP2011/075078 2010-11-05 2011-10-31 Dispositif à commande hydraulique pour machine de construction Ceased WO2012060331A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP11837981.7A EP2636910B1 (fr) 2010-11-05 2011-10-31 Dispositif à commande hydraulique pour machine de construction
KR1020137011676A KR101850570B1 (ko) 2010-11-05 2011-10-31 작업 기계의 유압 구동 장치
CN201180053096.2A CN103201523B (zh) 2010-11-05 2011-10-31 作业机械的液压驱动装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010248558A JP5481350B2 (ja) 2010-11-05 2010-11-05 作業機械の油圧駆動装置
JP2010-248558 2010-11-05

Publications (1)

Publication Number Publication Date
WO2012060331A1 true WO2012060331A1 (fr) 2012-05-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/075078 Ceased WO2012060331A1 (fr) 2010-11-05 2011-10-31 Dispositif à commande hydraulique pour machine de construction

Country Status (5)

Country Link
EP (1) EP2636910B1 (fr)
JP (1) JP5481350B2 (fr)
KR (1) KR101850570B1 (fr)
CN (1) CN103201523B (fr)
WO (1) WO2012060331A1 (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN108373129A (zh) * 2018-04-28 2018-08-07 浙江大学舟山海洋研究中心 超低温速冻生产线的同步升降装置
CN111120437A (zh) * 2020-02-05 2020-05-08 山东路得威工程机械制造有限公司 一种工程机械的多模转向行走系统

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CN103711172B (zh) * 2013-12-18 2015-12-09 广西柳工机械股份有限公司 装载机四泵定量合流液压系统
CN105986595B (zh) * 2015-02-04 2019-10-01 卡特彼勒（青州）有限公司 用于机器的液压系统及机器
CN110382784B (zh) 2017-12-26 2022-03-11 日立建机株式会社 作业机械
KR102343033B1 (ko) * 2021-04-19 2021-12-27 주식회사 모트롤 유압 시스템

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EP2636910A1 (fr) 2013-09-11
KR20130143581A (ko) 2013-12-31
CN103201523B (zh) 2015-05-06
KR101850570B1 (ko) 2018-04-19
JP2012097885A (ja) 2012-05-24
JP5481350B2 (ja) 2014-04-23
CN103201523A (zh) 2013-07-10
EP2636910A4 (fr) 2016-07-13

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