JPH01150202U - - Google Patents

Info

Publication number
JPH01150202U
JPH01150202U JP1988046812U JP4681288U JPH01150202U JP H01150202 U JPH01150202 U JP H01150202U JP 1988046812 U JP1988046812 U JP 1988046812U JP 4681288 U JP4681288 U JP 4681288U JP H01150202 U JPH01150202 U JP H01150202U
Authority
JP
Japan
Prior art keywords
hydraulic
valve
circuit
hydraulic pump
group
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.)
Pending
Application number
JP1988046812U
Other languages
English (en)
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 JP1988046812U priority Critical patent/JPH01150202U/ja
Priority to US07/329,674 priority patent/US5081837A/en
Publication of JPH01150202U publication Critical patent/JPH01150202U/ja
Pending 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
    • 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
    • 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
    • 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
    • F15B2211/20538—Type of pump constant 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
    • F15B2211/31—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
    • F15B2211/40—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
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • 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
    • F15B2211/75—Control of speed of the output member
    • 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

Description

【図面の簡単な説明】
第１図は本考案による油圧制御回路の一実施例
を示す回路図である。 １……第２のコントロールバルブ群（ヒツチコ
ントロールバルブ）、２……第１のコントロール
バルブ群（アタツチメント作業機のコントロール
バルブ）、４……開閉弁、８……チツエク弁、４
０……ばね、４１……パイロツト通路、Ｐ１……
第１の油圧ポンプ、Ｐ２……第２の油圧ポンプ。

Claims (1)

    【実用新案登録請求の範囲】
  1. 少なくとも２つの油圧ポンプと各々が１つ以上
    からなるコントロールバルブ群が直列に接続され
    ている油圧回路であつて、各油圧ポンプの吐出側
    がチエツク弁を介して接続され上流側のコントロ
    ールバルブ群の上流に接続されるとともに、一方
    の油圧ポンプはチエツク弁よりも上流側が開閉弁
    を介してタンク通路に接続され、前記開閉弁が、
    常態においてばねにより流れ方向が決められ、第
    １のコントロールバルブ群の下流側から導かれた
    圧力により開閉されることで要時に一方の油圧ポ
    ンプの吐出量を他方の油圧ポンプの吐出量と合流
    して回路に供給するようになつていることを特徴
    とする油圧制御回路。
JP1988046812U 1988-04-08 1988-04-08 Pending JPH01150202U (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1988046812U JPH01150202U (ja) 1988-04-08 1988-04-08
US07/329,674 US5081837A (en) 1988-04-08 1989-03-28 Hydraulic control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988046812U JPH01150202U (ja) 1988-04-08 1988-04-08

Publications (1)

Publication Number Publication Date
JPH01150202U true JPH01150202U (ja) 1989-10-17

Family

ID=12757744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988046812U Pending JPH01150202U (ja) 1988-04-08 1988-04-08

Country Status (2)

Country Link
US (1) US5081837A (ja)
JP (1) JPH01150202U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03259003A (ja) * 1990-03-09 1991-11-19 Kubota Corp 作業車輌用油圧回路

Families Citing this family (22)

* Cited by examiner, † Cited by third party
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US5513732A (en) * 1994-08-05 1996-05-07 Ford Motor Company Regulation of hydraulic pressure in a system having multiple pressure sources
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
AU720849B2 (en) * 1996-03-28 2000-06-15 Clark Equipment Company Multifunction valve stack
US6128900A (en) * 1998-01-28 2000-10-10 Case Corporation Hydraulic fluid supply system
US6170412B1 (en) * 1998-05-01 2001-01-09 Flexi-Coil Ltd. Hydraulic system having boost pump in parallel with a primary pump and a boost pump drive therefor
US6357231B1 (en) 2000-05-09 2002-03-19 Clark Equipment Company Hydraulic pump circuit for mini excavators
US6881165B2 (en) * 2001-02-07 2005-04-19 Toyota Jidosha Kabushiki Kaisha Hydraulic control apparatus of vehicle and control method
DE50303037D1 (de) * 2002-04-10 2006-05-24 Luk Lamellen & Kupplungsbau Hydrauliksystem, automatikgetriebe
GB2387674B (en) * 2002-04-20 2005-09-07 Agco Sa Load sensing hydraulic system
US7047735B2 (en) * 2004-07-30 2006-05-23 Deere & Company Increasing hydraulic flow to tractor attachments
US7665299B2 (en) * 2007-03-12 2010-02-23 Clark Equipment Company Hydraulic power management system
US8997478B2 (en) * 2011-09-22 2015-04-07 Deere & Company Multi-pump system with pump-flow diversion
CN102518171B (zh) * 2011-12-31 2014-08-13 中外合资沃得重工（中国）有限公司 具有合流加速功能的挖掘机铲斗液压系统
CN102900715B (zh) * 2012-10-08 2015-06-24 北京索普液压机电有限公司 叉车液压控制系统及叉车
CN103244499B (zh) * 2013-05-24 2015-10-07 柳州柳工挖掘机有限公司 一种行走双泵合流系统
KR101763284B1 (ko) * 2013-07-24 2017-07-31 볼보 컨스트럭션 이큅먼트 에이비 건설기계용 유압회로
JP6491523B2 (ja) * 2015-04-15 2019-03-27 Ｋｙｂ株式会社 流体圧制御装置
CN105065351A (zh) * 2015-07-15 2015-11-18 沙洲职业工学院 一种液压控制系统
JP6510396B2 (ja) * 2015-12-28 2019-05-08 日立建機株式会社 作業機械
TR201708846A2 (tr) * 2017-06-15 2017-09-21 Hema Enduestri Anonim Sirketi Hi̇droli̇k kaldiricilar i̇çi̇n bi̇r kontrol valfi̇
US11168711B2 (en) * 2019-10-24 2021-11-09 Deere & Company Hydraulic system for a multi-function machine
DE102021130272A1 (de) * 2021-11-19 2023-05-25 Still Gesellschaft Mit Beschränkter Haftung Hydrauliksystem für ein Flurförderzeug

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4825468B1 (ja) * 1968-01-10 1973-07-28

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US3760689A (en) * 1972-02-24 1973-09-25 Harnischfeger Corp Control system for automatically sequencing operation of a plurality of hydraulic pumps for supplying a plurality of hydraulic actuators
FR2324899A1 (fr) * 1974-01-14 1977-04-15 Poclain Sa Installation hydraulique permettant un stockage d'energie aux faibles puissances d'utilisation
US3868821A (en) * 1974-03-20 1975-03-04 Tyrone Hydraulics Automatic pump control system
FR2271429B1 (ja) * 1974-05-16 1978-03-31 Poclain Sa
JPS5821121B2 (ja) * 1974-11-22 1983-04-27 カヤバ工業株式会社 ノウヨウトラクタノ サギヨウキコントロ−ルベン
US3975909A (en) * 1975-02-26 1976-08-24 Tyrone Hydraulics, Inc. Engine sensor hydraulic control system
US4141280A (en) * 1977-07-11 1979-02-27 Caterpillar Tractor Co. Dual pump flow combining system
US4164119A (en) * 1978-03-27 1979-08-14 J. I. Case Company Hydraulic pump unloading system
JPS5837303A (ja) * 1981-08-31 1983-03-04 Kayaba Ind Co Ltd 農用トラクタの作業機コントロ−ル弁
US4819430A (en) * 1983-01-21 1989-04-11 Hydreco, Inc. Variably charged hydraulic circuit
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Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4825468B1 (ja) * 1968-01-10 1973-07-28

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03259003A (ja) * 1990-03-09 1991-11-19 Kubota Corp 作業車輌用油圧回路

Also Published As

Publication number Publication date
US5081837A (en) 1992-01-21

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