DE69319400D1 - Hydraulische schaltungsanordnung für erdbewegungsmaschinen - Google Patents

Hydraulische schaltungsanordnung für erdbewegungsmaschinen

Info

Publication number
DE69319400D1
DE69319400D1 DE69319400T DE69319400T DE69319400D1 DE 69319400 D1 DE69319400 D1 DE 69319400D1 DE 69319400 T DE69319400 T DE 69319400T DE 69319400 T DE69319400 T DE 69319400T DE 69319400 D1 DE69319400 D1 DE 69319400D1
Authority
DE
Germany
Prior art keywords
earthmover
circuit arrangement
hydraulic circuit
hydraulic
arrangement
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.)
Expired - Fee Related
Application number
DE69319400T
Other languages
English (en)
Other versions
DE69319400T2 (de
Inventor
Genroku Sugiyama
Toichi Hirata
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
Publication of DE69319400D1 publication Critical patent/DE69319400D1/de
Application granted granted Critical
Publication of DE69319400T2 publication Critical patent/DE69319400T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • F15B13/0403—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves a secondary valve member sliding within the main spool, e.g. for regeneration flow
    • 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
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement 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
    • E02F9/22—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
    • 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
    • E02F9/2282—Systems using center bypass type changeover valves
    • 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
    • E02F9/2285—Pilot-operated systems
    • 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
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • 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
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • 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
    • F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
    • F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
    • F15B13/0418—Load sensing elements sliding within a hollow main valve spool
    • 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
    • F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
    • 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
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F15B2211/3053—In combination with a pressure compensating valve
    • F15B2211/30555—Inlet and outlet of the pressure compensating valve being connected to the 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
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • 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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3122—Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
    • F15B2211/3127—Floating position connecting the working ports and the return line
    • 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
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional 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
    • F15B2211/30—Directional control
    • F15B2211/35—Directional control combined with flow control
    • F15B2211/351—Flow control by regulating means in 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
    • F15B2211/30—Directional control
    • F15B2211/365—Directional control combined with flow control and pressure 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
    • F15B2211/40—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
    • F15B2211/42—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
    • F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to the return line
    • 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
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle 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
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6057—Load sensing circuits having valve means between output member and the load sensing circuit using directional control 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
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7058—Rotary 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
    • F15B2211/70—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
    • 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
    • F15B2211/78—Control of multiple output members

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
DE69319400T 1992-04-20 1993-04-20 Hydraulische schaltungsanordnung für erdbewegungsmaschinen Expired - Fee Related DE69319400T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP9980192 1992-04-20
JP9980292 1992-04-20
PCT/JP1993/000508 WO1993021395A1 (en) 1992-04-20 1993-04-20 Hydraulic circuit device for construction machines

Publications (2)

Publication Number Publication Date
DE69319400D1 true DE69319400D1 (de) 1998-08-06
DE69319400T2 DE69319400T2 (de) 1998-12-03

Family

ID=26440908

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69319400T Expired - Fee Related DE69319400T2 (de) 1992-04-20 1993-04-20 Hydraulische schaltungsanordnung für erdbewegungsmaschinen

Country Status (5)

Country Link
US (1) US5446979A (de)
EP (1) EP0593782B1 (de)
KR (1) KR0132687B1 (de)
DE (1) DE69319400T2 (de)
WO (1) WO1993021395A1 (de)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4341244C2 (de) * 1993-12-03 1997-08-14 Orenstein & Koppel Ag Steuerung zur Aufteilung des durch mindestens eine Pumpe zur Verfügung gestellten Förderstromes bei Hydrauliksystemen auf mehrere Verbraucher
JP2892939B2 (ja) * 1994-06-28 1999-05-17 日立建機株式会社 油圧掘削機の油圧回路装置
US5784812A (en) * 1994-07-13 1998-07-28 O&K Orenstein & Koppel Ag Method of controlling the positioning of an outfit tilting cylinder mounted on the descending lift frame of movable construction machines
JP3013225B2 (ja) * 1995-01-11 2000-02-28 新キャタピラー三菱株式会社 吊り作業制御装置
US5615553A (en) * 1995-06-28 1997-04-01 Case Corporation Hydraulic circuit with load sensing feature
JP3511425B2 (ja) * 1995-09-18 2004-03-29 日立建機株式会社 油圧システム
JP3183815B2 (ja) * 1995-12-27 2001-07-09 日立建機株式会社 油圧ショベルの油圧回路
US5722190A (en) * 1996-03-15 1998-03-03 The Gradall Company Priority biased load sense hydraulic system for hydraulic excavators
US6018895A (en) * 1996-03-28 2000-02-01 Clark Equipment Company Valve stack in a mini-excavator directing fluid under pressure from multiple pumps to actuable elements
KR100205568B1 (ko) * 1996-07-10 1999-07-01 토니헬샴 로우더의 유압장치
JPH1037907A (ja) * 1996-07-26 1998-02-13 Komatsu Ltd 圧油供給装置
JP3517817B2 (ja) * 1997-02-24 2004-04-12 新キャタピラー三菱株式会社 油圧パイロット回路
US5940997A (en) * 1997-09-05 1999-08-24 Hitachi Construction Machinery Co., Ltd. Hydraulic circuit system for hydraulic working machine
JPH11166248A (ja) * 1997-12-05 1999-06-22 Komatsu Ltd 油圧駆動式作業車両
US6145287A (en) * 1998-03-05 2000-11-14 Sauer Inc. Hydrostatic circuit for harvesting machine
JP4111286B2 (ja) * 1998-06-30 2008-07-02 コベルコ建機株式会社 建設機械の走行制御方法及び同装置
US6357231B1 (en) 2000-05-09 2002-03-19 Clark Equipment Company Hydraulic pump circuit for mini excavators
JP3649139B2 (ja) * 2001-03-15 2005-05-18 コベルコ建機株式会社 走行制御装置
US6860291B2 (en) * 2001-04-17 2005-03-01 Bucher Hydraulics Gmbh Directional control valve comprising an internal pressure regulator
KR100813774B1 (ko) * 2001-12-31 2008-03-13 두산인프라코어 주식회사 소형 굴삭기의 유압펌프 제어장치
WO2004029369A1 (ja) * 2002-09-26 2004-04-08 Hitachi Construction Machinery Co., Ltd. 建設機械
US6926113B2 (en) * 2003-10-22 2005-08-09 Cnh America Llc Cushioned steering for articulated vehicle
DE102007048400A1 (de) 2007-06-06 2008-12-11 Zf Friedrichshafen Ag Schaltvorrichtung für Kraftfahrzeug-Wechselgetriebe
DE102007026421A1 (de) * 2007-06-06 2008-12-11 Zf Friedrichshafen Ag Servounterstützungseinrichtung
US8068969B2 (en) * 2007-11-30 2011-11-29 Caterpillar Inc. Power distribution system
EP2339185B1 (de) 2009-12-22 2013-02-13 HAWE Hydraulik SE Hydrauliksteuerung
GB2503158B (en) * 2011-03-15 2017-08-30 Husco Int Inc System for allocating fluid from multiple pumps to a plurality of hydraulic functions on a priority basis
ITPR20110039A1 (it) * 2011-05-13 2012-11-14 Walvoil Spa Distributore idraulico con collegamento in parallelo alle nicchie di regolazione della portata del cursore e al compensatore locale
JP5572586B2 (ja) * 2011-05-19 2014-08-13 日立建機株式会社 作業機械の油圧駆動装置
CN102434519B (zh) * 2011-11-29 2014-10-15 三一汽车起重机械有限公司 一种工程机械及其分合流液压控制系统
KR101893611B1 (ko) 2011-12-28 2018-08-31 두산인프라코어 주식회사 굴삭기 주행 연비 절감 시스템
US9702378B2 (en) * 2012-03-29 2017-07-11 Kyb Corporation Control valve apparatus of power shovel
US20140165767A1 (en) * 2012-12-19 2014-06-19 Deere And Company Manual synchronized gear shift assist
US9462740B2 (en) 2014-06-19 2016-10-11 Cnh Industrial America Llc Long distance electronic load sense signal communication for implement control
WO2017204698A1 (en) * 2016-05-23 2017-11-30 Volvo Construction Equipment Ab Hydraulic system
FR3055375B1 (fr) * 2016-08-25 2019-05-10 Robert Bosch Gmbh Circuit hydraulique de commande multiple
KR102564414B1 (ko) * 2018-10-29 2023-08-08 에이치디현대인프라코어 주식회사 건설기계의 주행 제어 시스템 및 건설기계의 주행 제어 방법

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030623A (en) * 1971-12-13 1977-06-21 Caterpillar Tractor Co. Hydraulic circuitry for an excavator
US3922855A (en) * 1971-12-13 1975-12-02 Caterpillar Tractor Co Hydraulic circuitry for an excavator
US3841423A (en) * 1972-01-24 1974-10-15 Clark Equipment Co Hydrostatic propulsion system
US3782478A (en) * 1973-03-02 1974-01-01 Allis Chalmers Fluid control system for earthworking apparatus including automatic pressure regulating means
US4023364A (en) * 1976-07-19 1977-05-17 Caterpillar Tractor Co. Swing flow supplemental travel for an excavator
US4078681A (en) * 1976-08-24 1978-03-14 Caterpillar Tractor Co. Dual pump hydraulic control system with predetermined flow crossover provision
JPS5727923Y2 (de) * 1977-01-08 1982-06-18
JPS5397285A (en) * 1977-02-04 1978-08-25 Toshiba Corp Method of evacuating air from electric bulb
US4336687A (en) * 1980-04-21 1982-06-29 Eaton Corporation Load sensing controller
JPS58146632A (ja) * 1982-02-24 1983-09-01 Hitachi Constr Mach Co Ltd 土木建設機械の油圧駆動システム
KR870000506B1 (ko) * 1981-05-02 1987-03-12 니시모도 후미히라(西元文平) 토목 건설기계의 유압회로 시스템
SE463902B (sv) * 1988-04-15 1991-02-11 Harry Holm Haallare till en behaallare foer flytande produkter
JPH0766798B2 (ja) * 1988-08-17 1995-07-19 古河電池株式会社 蓄電池端子部の気密形成法
JPH0254861U (de) * 1988-10-07 1990-04-20
JPH0674054B2 (ja) * 1989-07-19 1994-09-21 株式会社加藤製作所 油圧走行車両に於ける直進走行制御回路装置
US5203678A (en) * 1990-01-11 1993-04-20 Hitachi Construction Machinery Co., Ltd. Valve apparatus and hydraulic drive system
DE69213880T2 (de) * 1991-05-09 1997-02-27 Hitachi Construction Machinery Co., Ltd., Tokio/Tokyo Hydraulisches steuerungssystem für baumaschine
US5179835A (en) * 1991-08-15 1993-01-19 Eaton Corporation Brake valve for use in load sensing hydraulic system

Also Published As

Publication number Publication date
EP0593782A4 (de) 1995-03-22
EP0593782B1 (de) 1998-07-01
KR940701487A (ko) 1994-05-28
EP0593782A1 (de) 1994-04-27
DE69319400T2 (de) 1998-12-03
KR0132687B1 (ko) 1998-04-18
US5446979A (en) 1995-09-05
WO1993021395A1 (en) 1993-10-28

Similar Documents

Publication Publication Date Title
DE69319400D1 (de) Hydraulische schaltungsanordnung für erdbewegungsmaschinen
DE69525136D1 (de) Hydraulikkreislauf für hydraulikbagger
DE68909069D1 (de) Hydraulische Schaltung für Zylinder.
DE69506612D1 (de) Steuerschaltung für induktive Belastung
DE69720382D1 (de) Hydraulischer Schaltkreis für hydraulische Arbeitsmaschine
DE69308268D1 (de) Verbesserungen für hydraulische Antivibrationslagen
DE69307248D1 (de) Integrierte Schaltung für Microwellen
DE69129120D1 (de) Bauelement für intensitätsteilung
DE69322437D1 (de) Schnittstelle für Jontophorese
DE69505091D1 (de) Schaltungsganordnung
DE69505203D1 (de) Hydraulischer Kreislauf
DE69129297D1 (de) Hydraulikkreislauf
DE69322315D1 (de) Steuerschaltung für induktive last
DE69302112D1 (de) Steckdose für die Fernmeldetechnik
DE69617114D1 (de) Schaltkreis für induktive Last
DE69508316D1 (de) Hydraulischer Kreislauf
DE59510929D1 (de) Load-sensing Schaltung
DE59301134D1 (de) Hydraulische Steuereinrichtung für mehrere Verbraucher
FI972125A0 (fi) Hydraulinen murtovasara
DE69620709D1 (de) Hydaulikkreislauf für eine Geschirrspülmaschine
DE69029904D1 (de) Hydraulische schaltungsanordnung
DE69200545D1 (de) Ablassschraube für hydraulischen Kreislauf.
DE69216055D1 (de) Hydraulischer kreislauf für schwenkbare arbeitsvorrichtung
DE69327005D1 (de) Werkzeug für kombinationsverbinder
DE59500116D1 (de) Fahrerhaus-Baureihe für Frontlenker-Lastkraftwagen

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee