EP2660478A1 - Hydraulisches steuersystem eines auslegerdrehgelenkverbundantriebs einer einer baumaschine - Google Patents
Hydraulisches steuersystem eines auslegerdrehgelenkverbundantriebs einer einer baumaschine Download PDFInfo
- Publication number
- EP2660478A1 EP2660478A1 EP10861359.7A EP10861359A EP2660478A1 EP 2660478 A1 EP2660478 A1 EP 2660478A1 EP 10861359 A EP10861359 A EP 10861359A EP 2660478 A1 EP2660478 A1 EP 2660478A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- boom
- control valve
- hydraulic
- flow rate
- spool
- 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.)
- Granted
Links
Images
Classifications
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- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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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
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
-
- 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
- E02F9/2025—Particular purposes of control systems not otherwise provided for
- E02F9/2037—Coordinating the movements of the implement and of the frame
-
- 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
- E02F9/2221—Control of flow rate; Load sensing arrangements
- E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
- E02F9/2242—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance including an electronic controller
-
- 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
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
- F15B2211/30595—Assemblies of multiple valves having multiple valves for multiple output members with additional valves between the groups of valves for multiple output members
-
- 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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
-
- 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
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a directional control valve
-
- 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
- F15B2211/40—Flow control
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/428—Flow control characterised by the type of actuation actuated by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/455—Control of flow in the feed line, i.e. meter-in control
-
- 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
- F15B2211/665—Methods of control using electronic components
- F15B2211/6658—Control using different modes, e.g. four-quadrant-operation, working mode and transportation mode
-
- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
Definitions
- the present invention relates to a hydraulic control system for a combined boom and swing operation of a construction machine such as an excavator. More particularly, the present invention relates to a hydraulic system for a construction machine, in which the driving speeds of the boom and the swing device are adjusted according to working conditions during a combined operation in which boom-up and swing manipulations are carried out to perform an excavating and loading work, thereby ensuring a smooth work .
- a conventional hydraulic control system for a combined boom and swing operation of a construction machine in accordance with the prior art as shown in Fig. 1 includes:
- a non-explained reference numeral 11 denotes a boom confluence spool that allows the hydraulic fluid discharged from the first hydraulic pump 1 to join the hydraulic fluid discharged from the second hydraulic pump 2 when a boom-up operation is performed.
- an operator manipulates a boom manipulation lever 4 to shift a boom spool 5 and a boom confluence spool 11 so that the hydraulic fluid supplied to the boom cylinder via the boom spool 5 from the second hydraulic pump 2 and the hydraulic fluid supplied to the boom cylinder from the first hydraulic pump 1 via the boom confluence spool 11 join each other to cause the boom cylinder to be driven to perform a boom-up operation.
- an operator manipulates a manipulation lever (not shown) for the swing device to shift a swing spool 6 so that the hydraulic fluid supplied to the arm cylinder from the first hydraulic pump 1 via the swing spool 6 causes the swing device to be driven to swivel the upper swing structure.
- the hydraulic fluid discharged from the first hydraulic pump 1 is supplied to the boom cylinder via the boom spool 5 to drive the boom cylinder and the hydraulic fluid discharged from the first hydraulic pump 1 is distributingly supplied to the boom cylinder and the swing device, respectively, due to a difference in the pressure between the front ends of the boom confluence spool 11 and the swing spool 6.
- the present invention was made to solve the aforementioned problem occurring in the prior art, and it is an object of the present invention to provide a hydraulic control system for a combined boom and swing operation of a construction machine, in which an operator can easily adjust the driving speeds of the boom and the swing device depending on various kinds of working conditions such as the excavation depth or the height of a dump vehicle during a combined operation in which the boom and the swing device are manipulated to smoothly perform an excavating and loading work.
- Another object of the present invention to provide a hydraulic control system for a combined boom and swing operation of a construction machine, in which in the case where an operator selects a certain work mode needed for the working conditions within an operator cab during the excavating and loading work, the flow rate of the hydraulic fluid distributed to a boom confluence spool and a swing spool is controlled depending on the selected work mode so that the driving speeds of the boom and the swing device can be adjusted under the working conditions needed by the operator.
- a hydraulic control system for a combined boom and swing operation of a construction machine which includes first and second variable displacement hydraulic pumps, an actuator for a swing device and a work apparatus, which is connected to the first hydraulic pump, an actuator for a work apparatus connected to the second hydraulic pump, and a flow rate control valve configured to control a low rate of a hydraulic fluid supplied respectively to the actuators for the swing device and the work apparatus from the first and second hydraulic pumps, the hydraulic control system including:
- the electronic proportional pressure control valve is mounted inside the flow rate control valve.
- the electronic proportional pressure control valve is mounted outside the flow rate control valve.
- variable flow rate control valve uses a variable orifice whose opening area is variably adjusted in proportion to the control signal pressure from the electronic proportional pressure control valve.
- the hydraulic control system for a combined boom and swing operation of a construction machine in accordance with an embodiment of the present invention as constructed above has the following advantages.
- An operator can easily adjust the driving speeds of the boom and the swing device depending on various kinds of working conditions such as the excavation depth or the height of a dump vehicle during a combined operation in which the boom and the swing device are manipulated to perform an excavating and loading work, thereby improving workability.
- the driving speeds of the boom and the swing device can be adjusted under the working conditions needed by the operator, thereby improving convenience of the operator.
- a hydraulic control system for a combined boom and swing operation of a construction machine in accordance with an embodiment of the present invention as shown in Fig. 2 includes first and second variable displacement hydraulic pumps, an actuator for a swing device and a work apparatus, which is connected to the first hydraulic pump, an actuator for a work apparatus connected to the second hydraulic pump, and a flow rate control valve configured to control a flow rate of a hydraulic fluid supplied respectively to the actuators for the swing device and the work apparatus from the first and second hydraulic pumps.
- the hydraulic control system includes:
- the electronic proportional pressure control valve 9 is mounted inside the flow rate control valve (MCV) 3.
- the electronic proportional pressure control valve 9 may be constructed as an electro proportional pressure reducing valve (EPPRV), and may be mounted inside the flow rate control valve (MCV) 3.
- EPPRV electro proportional pressure reducing valve
- the electronic proportional pressure control valve 9 is mounted outside the flow rate control valve.
- variable flow rate control valve 10 may use a variable orifice whose opening area is variably adjusted in proportion to the control signal pressure from the electronic proportional pressure control valve 9.
- a non-explained reference numeral 11 denotes a boom confluence spool that allows the hydraulic fluid of the first hydraulic pump 1 to join the hydraulic fluid of the second hydraulic pump 2 when a boom-up operation is performed.
- the operator manipulates the boom manipulation lever 4 to conduct a boom-up operation and drives the swing device to swivel an upper swing structure in order to perform an excavating and loading work
- the operator manipulates the work mode selection switch 8 to select a certain work mode suitable for various kinds of working conditions such as the height of the ground surface of an excavation work site or the height of a dump vehicle.
- a part of a pilot signal pressure passing by the boom manipulation lever 4 is supplied to a boom spool 5 to shift the boom spool according to the boom-up manipulation of the boom manipulation lever 4.
- the hydraulic fluid discharged from the second hydraulic pump 2 is supplied to a boom cylinder (not shown) after passing through the boom spool 5 to perform the boom-up operation.
- a part of the pilot signal pressure passing by the boom manipulation lever 4 is supplied to the electronic proportional pressure control valve 9 mounted in the pilot flow path 7.
- the electronic proportional pressure control valve 9 outputs a pilot signal pressure in proportion to a select signal corresponding to a work mode selected according to the manipulation of the work mode selection switch 8.
- the signal pressure passing through the electronic proportional pressure control valve 9 is supplied to the variable flow rate control valve 10 so that the opening area of the variable flow rate control valve 10 is controlled. That is, the opening diameter of the variable flow rate control valve 10 is controlled in proportion to the control signal pressure outputted from the electronic proportional pressure control valve 9 depending on the selected work mode.
- the flow rate of the hydraulic fluid discharged from the first hydraulic pump 1 and supplied to the spool 6 for the swing device is reduced to match the selected work mode, and the flow rate of the hydraulic fluid supplied to the boom confluence spool 11 is increased.
- the boom-up operation is performed at a relatively high speed as compared to the swing operation of the upper swing structure so that the loading work can be carried out safely.
- Fig. 3 it can be seen that the hydraulic fluid discharged from the first hydraulic pump 1 is supplied to the boom cylinder in proportion to a pilot signal pressure Pi1 outputted from the electronic proportional pressure control valve 9 to fit the work mode (meaning a line"a"on the graph of Fig. 3 ) selected by the manipulation of the work mode selection switch 8.
- the hydraulic control system for a combined boom and swing operation of a construction machine in accordance with an embodiment of the present invention, it is possible to adjust the driving speeds of the boom and the swing device depending on various kinds of working conditions such as the excavation depth or the height of a dump vehicle during a combined operation in which boom-up and swing manipulations are carried out to perform an excavating and loading work.
- the driving speeds of the boom and the swing device are adjusted under the working conditions needed by the operator, thereby improving convenience and manipulability.
Landscapes
- 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)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/KR2010/009361 WO2012091187A1 (ko) | 2010-12-27 | 2010-12-27 | 건설기계의 붐-선회 복합구동 유압 제어시스템 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2660478A1 true EP2660478A1 (de) | 2013-11-06 |
EP2660478A4 EP2660478A4 (de) | 2014-08-20 |
EP2660478B1 EP2660478B1 (de) | 2017-03-15 |
Family
ID=46383250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10861359.7A Not-in-force EP2660478B1 (de) | 2010-12-27 | 2010-12-27 | Hydraulisches steuersystem eines auslegerdrehgelenkverbundantriebs einer einer baumaschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US20130291530A1 (de) |
EP (1) | EP2660478B1 (de) |
JP (1) | JP2014505810A (de) |
KR (1) | KR20130137192A (de) |
CN (1) | CN103299089B (de) |
WO (1) | WO2012091187A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3428350A4 (de) * | 2016-03-11 | 2019-12-18 | Hitachi Construction Machinery Co., Ltd. | Steuerungsvorrichtung für baumaschinen |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101729584B1 (ko) * | 2012-08-27 | 2017-04-24 | 볼보 컨스트럭션 이큅먼트 에이비 | 건설기계용 유압시스템 |
US9926135B2 (en) * | 2012-10-09 | 2018-03-27 | The Heil Co. | Externally controlled switch mechanism |
CN103015473A (zh) * | 2012-12-10 | 2013-04-03 | 三一重机有限公司 | 挖掘机、动臂对回转优先控制方法及优先阀 |
JP6220228B2 (ja) * | 2013-10-31 | 2017-10-25 | 川崎重工業株式会社 | 建設機械の油圧駆動システム |
KR102131447B1 (ko) | 2013-11-12 | 2020-07-08 | 현대모비스 주식회사 | 차량의 에어벤트 |
EP3255285B1 (de) * | 2015-01-08 | 2020-11-11 | Volvo Construction Equipment AB | Antriebssteuerungsverfahren für hydraulischen aktuator einer baumaschine |
CN109563696B (zh) * | 2017-05-09 | 2021-05-07 | 日立建机株式会社 | 作业机械 |
WO2019066111A1 (en) * | 2017-09-29 | 2019-04-04 | Volvo Construction Equipment Ab | FLOW CONTROL VALVE AND HYDRAULIC MACHINE COMPRISING THE SAME |
CA3081344C (en) * | 2017-11-01 | 2023-10-17 | Clark Equipment Company | Control system for power machine |
DE102019201182A1 (de) * | 2019-01-30 | 2020-07-30 | Putzmeister Engineering Gmbh | Fahrzeug |
CN113544340B (zh) * | 2019-03-19 | 2023-08-18 | 住友建机株式会社 | 挖土机 |
EP4335981B1 (de) * | 2022-09-08 | 2024-10-30 | XCMG European Research Center GmbH | Baumaschine mit einem hydrauliksystem |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH093977A (ja) * | 1995-06-23 | 1997-01-07 | Daewoo Heavy Ind Co Ltd | 掘削機の流量制御装置 |
JP2002047691A (ja) * | 2000-08-03 | 2002-02-15 | Komatsu Ltd | 作業用車両 |
EP1672128A2 (de) * | 2004-12-16 | 2006-06-21 | Doosan Infracore Co., Ltd. | Hydraulische Steuereinrichtung für Bagger mit verbesserter Ladeleistung an Steigungen |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3106164B2 (ja) * | 1988-03-03 | 2000-11-06 | 日立建機株式会社 | 油圧機械の油圧駆動方法及び油圧駆動装置 |
EP0419673B1 (de) * | 1989-03-22 | 1997-01-08 | Hitachi Construction Machinery Co., Ltd. | Hydraulisches antriebssystem für das bauwesen und für baumaschinen |
US5125232A (en) * | 1990-05-29 | 1992-06-30 | Kubota Corporation | Control change system for a hydraulic working vehicle |
JP2583148B2 (ja) * | 1990-06-19 | 1997-02-19 | 株式会社小松製作所 | 油圧式掘削機の油圧制御回路 |
KR960013596B1 (ko) * | 1992-07-29 | 1996-10-09 | 현대중장비산업 주식회사 | 건설기계의 작업 자동제어 장치 |
JP3078947B2 (ja) * | 1993-03-30 | 2000-08-21 | 株式会社神戸製鋼所 | 流体圧アクチュエータの駆動制御装置 |
JP3477687B2 (ja) * | 1993-11-08 | 2003-12-10 | 日立建機株式会社 | 流量制御装置 |
US6050090A (en) * | 1996-06-11 | 2000-04-18 | Kabushiki Kaisha Kobe Seiko Sho | Control apparatus for hydraulic excavator |
JPH10220411A (ja) * | 1997-02-06 | 1998-08-21 | Hitachi Constr Mach Co Ltd | 油圧パイロット操作装置 |
US20050139273A1 (en) * | 2003-12-29 | 2005-06-30 | Tecnord S.R.L. | Electromechanically controlled proportional valve |
KR100900436B1 (ko) * | 2007-05-21 | 2009-06-01 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 무한궤도형 중장비의 주행장치 |
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2010
- 2010-12-27 JP JP2013547272A patent/JP2014505810A/ja active Pending
- 2010-12-27 WO PCT/KR2010/009361 patent/WO2012091187A1/ko active Application Filing
- 2010-12-27 EP EP10861359.7A patent/EP2660478B1/de not_active Not-in-force
- 2010-12-27 US US13/996,818 patent/US20130291530A1/en not_active Abandoned
- 2010-12-27 KR KR1020137016543A patent/KR20130137192A/ko not_active Application Discontinuation
- 2010-12-27 CN CN201080071033.5A patent/CN103299089B/zh not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH093977A (ja) * | 1995-06-23 | 1997-01-07 | Daewoo Heavy Ind Co Ltd | 掘削機の流量制御装置 |
JP2002047691A (ja) * | 2000-08-03 | 2002-02-15 | Komatsu Ltd | 作業用車両 |
EP1672128A2 (de) * | 2004-12-16 | 2006-06-21 | Doosan Infracore Co., Ltd. | Hydraulische Steuereinrichtung für Bagger mit verbesserter Ladeleistung an Steigungen |
Non-Patent Citations (1)
Title |
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See also references of WO2012091187A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3428350A4 (de) * | 2016-03-11 | 2019-12-18 | Hitachi Construction Machinery Co., Ltd. | Steuerungsvorrichtung für baumaschinen |
Also Published As
Publication number | Publication date |
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KR20130137192A (ko) | 2013-12-16 |
EP2660478A4 (de) | 2014-08-20 |
WO2012091187A1 (ko) | 2012-07-05 |
CN103299089A (zh) | 2013-09-11 |
CN103299089B (zh) | 2016-08-10 |
EP2660478B1 (de) | 2017-03-15 |
US20130291530A1 (en) | 2013-11-07 |
JP2014505810A (ja) | 2014-03-06 |
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