JPS55120802U - - Google Patents

Info

Publication number
JPS55120802U
JPS55120802U JP1979019754U JP1975479U JPS55120802U JP S55120802 U JPS55120802 U JP S55120802U JP 1979019754 U JP1979019754 U JP 1979019754U JP 1975479 U JP1975479 U JP 1975479U JP S55120802 U JPS55120802 U JP S55120802U
Authority
JP
Japan
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.)
Pending
Application number
JP1979019754U
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 filed Critical
Priority to JP1979019754U priority Critical patent/JPS55120802U/ja
Priority to US06/121,735 priority patent/US4367624A/en
Publication of JPS55120802U publication Critical patent/JPS55120802U/ja
Pending legal-status Critical Current

Links

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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80—Component parts
    • E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
    • E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically
    • 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
    • E02F9/2292—Systems with 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
    • 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
    • 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
    • F15B2211/20584—Combinations of pumps with high and low 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30585—Assemblies of multiple valves having a single valve 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
    • F15B2211/30—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
    • F15B2211/32—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
    • F15B2211/60—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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/67—Methods for controlling pilot 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel
    • 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
JP1979019754U 1979-02-20 1979-02-20 Pending JPS55120802U (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1979019754U JPS55120802U (ja) 1979-02-20 1979-02-20
US06/121,735 US4367624A (en) 1979-02-20 1980-02-15 Control system for hydraulic actuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1979019754U JPS55120802U (ja) 1979-02-20 1979-02-20

Publications (1)

Publication Number Publication Date
JPS55120802U true JPS55120802U (ja) 1980-08-27

Family

ID=12008124

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1979019754U Pending JPS55120802U (ja) 1979-02-20 1979-02-20

Country Status (2)

Country Link
US (1) US4367624A (ja)
JP (1) JPS55120802U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010112475A (ja) * 2008-11-06 2010-05-20 Hitachi Constr Mach Co Ltd 作業機械の油圧駆動装置

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5810960U (ja) * 1981-07-10 1983-01-24 日立建機株式会社 油圧ショベルの油圧回路
US4610599A (en) * 1983-09-01 1986-09-09 Allis-Chalmers Corporation Apparatus for controlling a hydraulic turbine
US4588357A (en) * 1984-07-24 1986-05-13 Power Draulics-Nielsen, Inc. Hydraulic throttle control
US4984427A (en) * 1989-09-01 1991-01-15 Kabushiki Kaisha Kobe Seiko Sho Control circuit for hydraulic actuator
AU631727B2 (en) * 1990-03-09 1992-12-03 Kubota Corporation Hydraulic circuit for a working vehicle having a plurality of hydraulic actuators
JPH07502240A (ja) * 1991-04-10 1995-03-09 クラーク・マテリアル・ハンドリング・カンパニー コンテナ搬送装置
JPH06123123A (ja) * 1992-05-22 1994-05-06 Hitachi Constr Mach Co Ltd 油圧駆動装置
US5335494A (en) * 1993-01-21 1994-08-09 Deere & Company Hydraulic system for reel mower vehicles
DE19939796C1 (de) * 1999-08-21 2000-11-23 Orenstein & Koppel Ag Verfahren und Arbeitsmaschine zur Herstellung von Bodenflächen
JP3846776B2 (ja) * 2001-02-06 2006-11-15 新キャタピラー三菱株式会社 作業機械におけるブームシリンダの油圧制御回路
JP4137431B2 (ja) * 2001-11-09 2008-08-20 ナブテスコ株式会社 油圧回路
US6892535B2 (en) * 2002-06-14 2005-05-17 Volvo Construction Equipment Holding Sweden Ab Hydraulic circuit for boom cylinder combination having float function
JP4825765B2 (ja) * 2007-09-25 2011-11-30 株式会社クボタ バックホーの油圧システム
US8978374B2 (en) 2011-10-21 2015-03-17 Caterpillar Inc. Meterless hydraulic system having flow sharing and combining functionality
JP5978985B2 (ja) * 2012-12-26 2016-08-24 コベルコ建機株式会社 油圧制御装置及びこれを備えた建設機械
WO2014208795A1 (ko) * 2013-06-28 2014-12-31 볼보 컨스트럭션 이큅먼트 에이비 플로팅기능을 갖는 건설기계용 유압회로 및 플로팅기능 제어방법
US9863120B2 (en) * 2015-04-29 2018-01-09 Caterpillar Inc. System and method for controlling a machine implement
US10352335B2 (en) * 2015-12-22 2019-07-16 Kubota Corporation Hydraulic system of work machine
US11215201B2 (en) * 2018-03-28 2022-01-04 Kubota Corporation Hydraulic system for working machine
JP7091185B2 (ja) * 2018-08-09 2022-06-27 株式会社クボタ 作業機の油圧システム及び作業機の油圧制御方法
CN114109936B (zh) * 2021-11-29 2022-10-21 浙江大学 一种臂架液压传动系统及其控制方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5311694A (en) * 1976-07-19 1978-02-02 Yoshitsuka Seiki Kk Automatic continuous film feeder

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336955A (en) * 1941-09-19 1943-12-14 Conrad L Ott Grinding machine
US3355994A (en) * 1966-01-13 1967-12-05 New York Air Brake Co Hydraulic system
DE2148502B2 (de) * 1971-09-29 1978-11-02 G.L. Rexroth Gmbh, 8770 Lohr Ein- oder mehrkreisiges Hydrauliksystem
US3835647A (en) * 1972-01-27 1974-09-17 Gen Signal Corp Multiple speed hydraulic drive circuit
US3952510A (en) * 1975-06-06 1976-04-27 Caterpillar Tractor Co. Flow sensing and control apparatus
US4210061A (en) * 1976-12-02 1980-07-01 Caterpillar Tractor Co. Three-circuit fluid system having controlled fluid combining
US4112821A (en) * 1976-12-03 1978-09-12 Caterpillar Tractor Co. Fluid control system for multiple circuited work elements
US4142445A (en) * 1977-03-17 1979-03-06 Caterpillar Tractor Co. Crossover plural circuit fluid system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5311694A (en) * 1976-07-19 1978-02-02 Yoshitsuka Seiki Kk Automatic continuous film feeder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010112475A (ja) * 2008-11-06 2010-05-20 Hitachi Constr Mach Co Ltd 作業機械の油圧駆動装置

Also Published As

Publication number Publication date
US4367624A (en) 1983-01-11

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