JPH01133503U - - Google Patents

Info

Publication number
JPH01133503U
JPH01133503U JP1988028563U JP2856388U JPH01133503U JP H01133503 U JPH01133503 U JP H01133503U JP 1988028563 U JP1988028563 U JP 1988028563U JP 2856388 U JP2856388 U JP 2856388U JP H01133503 U JPH01133503 U JP H01133503U
Authority
JP
Japan
Prior art keywords
valve
directional control
cylinder
switching
control valve
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
JP1988028563U
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 JP1988028563U priority Critical patent/JPH01133503U/ja
Priority to ES89103400T priority patent/ES2043915T3/es
Priority to US07/316,131 priority patent/US4955283A/en
Priority to EP89103400A priority patent/EP0331076B1/en
Priority to DE89103400T priority patent/DE68909069T2/de
Priority to KR1019890002468A priority patent/KR930005274B1/ko
Publication of JPH01133503U publication Critical patent/JPH01133503U/ja
Pending legal-status Critical Current

Links

Classifications

    • 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
    • E02F3/627—Devices to connect beams or arms to tractors or similar self-propelled machines, e.g. drives therefor
    • 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
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • 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
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • 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
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices
    • 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
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices
    • F15B13/015—Locking-valves or other detent i.e. load-holding devices using an enclosed pilot flow 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
    • 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
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks

Description

【図面の簡単な説明】
第１図は本考案の実施例を示す油圧回路図、第
２図は選択弁の具体例を示す断面図、第３図はパ
イロツト操作弁のレバー操作量とパイロツト圧お
よび選択弁と方向制御弁との切換え時期を示す説
明図、第４図は別の実施例を示す油圧回路図であ
る。 １…メインポンプ、２…方向制御弁、３…パイ
ロツト操作弁、４…シリンダ、５…ロジツク弁、
６…選択弁、２１，２２，２３…管路、４１…ロ
ツド側油室（負荷降下用油室）、４２…ヘツド側
油室（負荷保持用油室）、５１…ロジツク弁の第
１ポート、５２…同第２ポート、５３…ポペツト
、５４…ばね、５５…ばね室。

Claims (1)

  1. 【実用新案登録請求の範囲】 １ 方向制御弁の切換えによつて油圧源からシリ
    ンダの両油室に対する圧油の給排を制御するよう
    に構成した油圧回路において、上記方向制御弁と
    シリンダの負荷保持用油室との間にロジツク弁が
    配置され、ロジツク弁の第１ポートが方向制御弁
    に、第２ポートが上記負荷保持用油室にそれぞれ
    接続され、上記方向制御弁の切換え操作に連動し
    シリンダの負荷降下用油室への圧油供給時にロジ
    ツク弁のばね室を上記第１ポートと方向制御弁と
    の間の管路に連通させ、それ以外の時に上記ばね
    室を第２ポートに連通させる選択弁が設けられて
    いることを特徴とするシリンダの油圧回路。 ２ 上記方向制御弁がパイロツト操作弁からのパ
    イロツト圧によつて切換えられるパイロツト切換
    弁であることを特徴とする請求項１記載のシリン
    ダの油圧回路。 ３ 上記選択弁は、方向制御弁を切換えるための
    パイロツト操作弁からのパイロツト圧によつて切
    換えられるパイロツト切換弁で構成されているこ
    とを特徴とする請求項２記載のシリンダの油圧回
    路。 ４ 上記選択弁の切換え設定圧が方向制御弁の切
    換え設定圧よりも低圧に設定されていることを特
    徴とする請求項３記載のシリンダの油圧回路。 ５ 選択弁がシート弁で構成されていることを特
    徴とする請求項３または４記載のシリンダの油圧
    回路。
JP1988028563U 1988-03-03 1988-03-03 Pending JPH01133503U (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP1988028563U JPH01133503U (ja) 1988-03-03 1988-03-03
ES89103400T ES2043915T3 (es) 1988-03-03 1989-02-27 Un circuito hidraulico para un cilindro.
US07/316,131 US4955283A (en) 1988-03-03 1989-02-27 Hydraulic circuit for cylinder
EP89103400A EP0331076B1 (en) 1988-03-03 1989-02-27 Hydraulic circuit for cylinder
DE89103400T DE68909069T2 (de) 1988-03-03 1989-02-27 Hydraulische Schaltung für Zylinder.
KR1019890002468A KR930005274B1 (ko) 1988-03-03 1989-02-28 실린더용 유압회로

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988028563U JPH01133503U (ja) 1988-03-03 1988-03-03

Publications (1)

Publication Number Publication Date
JPH01133503U true JPH01133503U (ja) 1989-09-12

Family

ID=12252110

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988028563U Pending JPH01133503U (ja) 1988-03-03 1988-03-03

Country Status (6)

Country Link
US (1) US4955283A (ja)
EP (1) EP0331076B1 (ja)
JP (1) JPH01133503U (ja)
KR (1) KR930005274B1 (ja)
DE (1) DE68909069T2 (ja)
ES (1) ES2043915T3 (ja)

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JP2559612B2 (ja) * 1988-02-29 1996-12-04 株式会社小松製作所 操作弁装置
JPH0663521B2 (ja) * 1988-02-29 1994-08-22 株式会社小松製作所 操作弁装置
WO1990001588A1 (en) * 1988-08-02 1990-02-22 Kabushiki Kaisha Komatsu Seisakusho Moving speed regulator for hydraulically driven working machines
DE3922553C2 (de) * 1989-07-08 2002-03-14 Mannesmann Rexroth Ag Vorrichtung zur Entlastung eines unter hohem Druck stehenden mit Hydraulikflüssigkeit gefüllten Arbeitsraumes
IT1244021B (it) * 1990-11-21 1994-06-28 Siti Circuito idraulico per un apparato di pressatura e apparato di pressatura impiegante il circuito idraulico
US5207059A (en) * 1992-01-15 1993-05-04 Caterpillar Inc. Hydraulic control system having poppet and spool type valves
SE470446B (sv) * 1992-08-21 1994-03-28 Electrolux Ab Hydraulmotor försedd med en by-pass-ledning mellan in- och utloppsledning, i vilken by-pass-ledning är anordnad en huvudventil för pådrag respektive stopp av hydraulmotorn
US5349151A (en) * 1993-02-08 1994-09-20 Savair Inc. Low impact flow control device
US5331882A (en) * 1993-04-05 1994-07-26 Deere & Company Control valve system with float valve
GB2294978B (en) * 1993-08-13 1998-03-11 Komatsu Mfg Co Ltd Flow control device for hydraulic circuit
JPH07127607A (ja) * 1993-09-07 1995-05-16 Yutani Heavy Ind Ltd 作業機械の油圧装置
JPH07139507A (ja) * 1993-11-15 1995-05-30 Shin Caterpillar Mitsubishi Ltd 建設機械のアクチュエータ制御装置
CN1149331A (zh) * 1994-03-29 1997-05-07 株式会社小松制作所 导向压力传动的方向控制阀及工作油缸控制装置
US5540258A (en) * 1994-09-30 1996-07-30 Samsung Heavy Industries Co., Ltd. Holding check control valve
US5490384A (en) * 1994-12-08 1996-02-13 Caterpillar Inc. Hydraulic flow priority system
DE19528981C1 (de) * 1995-08-07 1996-10-02 Heilmeier & Weinlein Verfahren zum Steuern eines Hydroverbrauchers und hydraulische Steuervorrichtung zur Durchführung des Verfahrens
DE69626537T2 (de) * 1995-12-15 2004-02-12 Parker Hannifin Plc, Hemel Hempstead Steuerventile
US5921165A (en) * 1996-08-08 1999-07-13 Hitachi Construction Machinery Co., Ltd. Hydraulic control system
JP3478931B2 (ja) * 1996-09-20 2003-12-15 新キャタピラー三菱株式会社 油圧回路
JP3919399B2 (ja) * 1998-11-25 2007-05-23 カヤバ工業株式会社 油圧制御回路
DE60019500T2 (de) 1999-07-23 2006-02-23 Kabushiki Kaisha Toyota Jidoshokki, Kariya Steuervorrichtung für Zylinder
US6409142B1 (en) * 1999-10-20 2002-06-25 Hitachi Construction Machinery Co. Ltd. Pipe breakage control valve device
JP3727828B2 (ja) * 2000-05-19 2005-12-21 日立建機株式会社 配管破断制御弁装置
KR20030052031A (ko) * 2001-12-20 2003-06-26 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 건설중장비용 유압밸브의 제어장치
JP3915622B2 (ja) * 2002-07-30 2007-05-16 コベルコ建機株式会社 油圧アクチュエータ回路の負荷保持装置
KR100611718B1 (ko) * 2005-06-17 2006-08-11 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 홀딩밸브를 갖는 압력보상형 유압회로
US7213502B2 (en) * 2005-09-09 2007-05-08 Caterpillar Inc Robustly stable servo-controlled metering poppet valve
WO2007069748A1 (ja) * 2005-12-14 2007-06-21 Kayaba Industry Co., Ltd. アクチュエータ制御装置
MX2008008389A (es) * 2005-12-30 2009-01-09 Roger Hirsch Punto de compresion de una maquina de soldadura por resistencia sensor de seguridad.
DE602006006676D1 (de) * 2006-09-01 2009-06-18 Parker Hannifin Ab Ventilanordnung
EP1895169A1 (en) * 2006-09-04 2008-03-05 OIL CONTROL S.p.A. A high pressure relief and control valve assembly
WO2011003210A1 (de) * 2009-07-06 2011-01-13 Bucher Hydraulics Ag Anordnung zur bereitstellung eines veränderbaren drosselquerschnitts für einen fluidstrom
US8863509B2 (en) * 2011-08-31 2014-10-21 Caterpillar Inc. Meterless hydraulic system having load-holding bypass
US8944103B2 (en) 2011-08-31 2015-02-03 Caterpillar Inc. Meterless hydraulic system having displacement control valve
US8966891B2 (en) 2011-09-30 2015-03-03 Caterpillar Inc. Meterless hydraulic system having pump protection
CN105358844B (zh) * 2013-04-22 2017-05-24 派克汉尼芬公司 用于控制液压致动器中压力的方法
CN104019072A (zh) * 2014-06-11 2014-09-03 山重建机有限公司 一种先导式多路阀系统和液压系统
US20170023149A1 (en) * 2015-07-22 2017-01-26 Cnh Industrial America Llc Hydraulic signal control system and method
DE102016006545A1 (de) * 2016-05-25 2017-11-30 Hydac System Gmbh Ventilvorrichtung
DE102016124118B4 (de) * 2016-12-13 2021-12-09 Voith Patent Gmbh Hydraulischer Antrieb mit Eil- und Lasthub
WO2019182128A1 (ja) * 2018-03-22 2019-09-26 住友重機械工業株式会社 ショベル
CN115667733A (zh) * 2020-05-22 2023-01-31 沃尔沃建筑设备公司 液压机
WO2022241586A1 (zh) * 2021-05-16 2022-11-24 浙江吉利控股集团有限公司 一种液压控制阀、液压控制系统及变速器

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Also Published As

Publication number Publication date
KR890014843A (ko) 1989-10-25
US4955283A (en) 1990-09-11
EP0331076B1 (en) 1993-09-15
DE68909069T2 (de) 1994-02-03
KR930005274B1 (ko) 1993-06-17
DE68909069D1 (de) 1993-10-21
EP0331076A1 (en) 1989-09-06
ES2043915T3 (es) 1994-01-01

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