DE68923934T2 - Hydraulische steuereinheit für hydraulikbagger. - Google Patents

Hydraulische steuereinheit für hydraulikbagger.

Info

Publication number
DE68923934T2
DE68923934T2 DE68923934T DE68923934T DE68923934T2 DE 68923934 T2 DE68923934 T2 DE 68923934T2 DE 68923934 T DE68923934 T DE 68923934T DE 68923934 T DE68923934 T DE 68923934T DE 68923934 T2 DE68923934 T2 DE 68923934T2
Authority
DE
Germany
Prior art keywords
hydraulic
valve
pressure
control
relief
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
DE68923934T
Other languages
German (de)
English (en)
Other versions
DE68923934D1 (de
Inventor
Nobuhisa Kamikawa
Kimio Nishida
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Publication of DE68923934D1 publication Critical patent/DE68923934D1/de
Application granted granted Critical
Publication of DE68923934T2 publication Critical patent/DE68923934T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • E02F3/76—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
    • 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
    • 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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/002—Hydraulic systems to change the pump delivery

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
DE68923934T 1988-02-25 1989-02-13 Hydraulische steuereinheit für hydraulikbagger. Expired - Fee Related DE68923934T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63042904A JPH01220706A (ja) 1988-02-25 1988-02-25 油圧式掘削機の油圧制御装置
PCT/JP1989/000140 WO1989008190A1 (fr) 1988-02-25 1989-02-13 Unite de commande hydraulique pour excavateurs hydrauliques

Publications (2)

Publication Number Publication Date
DE68923934D1 DE68923934D1 (de) 1995-09-28
DE68923934T2 true DE68923934T2 (de) 1996-04-11

Family

ID=12649020

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68923934T Expired - Fee Related DE68923934T2 (de) 1988-02-25 1989-02-13 Hydraulische steuereinheit für hydraulikbagger.

Country Status (6)

Country Link
US (1) US5077974A (enExample)
EP (1) EP0372081B1 (enExample)
JP (1) JPH01220706A (enExample)
KR (1) KR0141982B1 (enExample)
DE (1) DE68923934T2 (enExample)
WO (1) WO1989008190A1 (enExample)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07103593B2 (ja) * 1990-06-06 1995-11-08 株式会社小松製作所 積み込み作業車両の制御装置及び方法
JPH04121503U (ja) * 1991-04-16 1992-10-30 住友建機株式会社 油圧式建設車両の自動昇圧回路
US5456077A (en) * 1994-04-22 1995-10-10 Mcneilus Truck And Manufacturing, Inc. Remote unloader hydraulic valve system
US5540049A (en) * 1995-08-01 1996-07-30 Caterpillar Inc. Control system and method for a hydraulic actuator with velocity and force modulation control
JP4026969B2 (ja) * 1999-01-22 2007-12-26 株式会社小松製作所 建設機械の油圧回路
US6408676B1 (en) 1999-03-31 2002-06-25 Caterpillar Inc. Method and apparatus for determining the status of a relief valve
KR100797315B1 (ko) * 2001-07-16 2008-01-23 두산인프라코어 주식회사 굴삭기의 주행 및 프론트작업의 복합작업용 유압제어장치
KR100594851B1 (ko) * 2002-04-30 2006-07-03 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 유압식 브레이크장치
JP4082935B2 (ja) * 2002-06-05 2008-04-30 株式会社小松製作所 ハイブリッド式建設機械
KR100988429B1 (ko) * 2003-12-26 2010-10-18 두산인프라코어 주식회사 굴삭기의 주행복합작업용 유압제어장치
KR100988443B1 (ko) * 2003-12-26 2010-10-18 두산인프라코어 주식회사 굴삭기의 주행 및 프론트작업의 복합동작용 유압제어장치
EP1676963A3 (en) * 2004-12-30 2008-12-31 Doosan Infracore Co., Ltd. Fluid pump control system for excavators
US9086143B2 (en) 2010-11-23 2015-07-21 Caterpillar Inc. Hydraulic fan circuit having energy recovery
CN102140807B (zh) * 2011-01-11 2012-05-23 徐州徐工挖掘机械有限公司 一种提高挖掘机挖掘操纵特性和平整作业特性的方法
CN103352886B (zh) * 2013-06-28 2015-12-23 山河智能装备股份有限公司 能量回收利用液压控制阀

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE757640A (fr) * 1969-10-16 1971-04-16 Borg Warner Systemes hydrauliques, notamment pour la regulation d'une pompea debit variable
JPS5217795Y2 (enExample) * 1971-04-26 1977-04-22
JPS54126146U (enExample) * 1978-02-22 1979-09-03
DE3024399A1 (de) * 1980-06-28 1982-01-21 Linde Ag, 6200 Wiesbaden Regeleinrichtung fuer ein aggregat aus mehreren, von einer gemeinsamen primaerenergiequelle angetriebenen pumpe
US4571941A (en) * 1980-12-27 1986-02-25 Hitachi Construction Machinery Co, Ltd. Hydraulic power system
JPS57184749A (en) * 1981-05-01 1982-11-13 Hitachi Constr Mach Co Ltd Control device for hydraulic system
JPS5876853U (ja) * 1981-11-19 1983-05-24 株式会社小松製作所 油圧駆動装置
US4481770A (en) * 1982-03-22 1984-11-13 Caterpillar Tractor Co. Fluid system with flow compensated torque control
JPH0633772B2 (ja) * 1983-12-29 1994-05-02 カヤバ工業株式会社 可変容量ポンプの制御装置
JPS60250132A (ja) * 1984-05-25 1985-12-10 Kayaba Ind Co Ltd 建設車両の油圧制御回路
JPS6193552A (ja) * 1984-10-15 1986-05-12 Matsushita Electric Works Ltd 充電式電気機器
JPS6193552U (enExample) * 1984-11-27 1986-06-17
JPS6256801A (ja) * 1985-09-06 1987-03-12 Toshiba Corp 曲り導体のピツチ間距離測定器
JPS6256801U (enExample) * 1985-09-30 1987-04-08
JPS62167880A (ja) * 1986-01-20 1987-07-24 Nippon Kokan Kk <Nkk> 管内外面のコ−テイング装置
JPH0740702Y2 (ja) * 1986-04-11 1995-09-20 株式会社小松製作所 移動式建設機械の油圧駆動装置

Also Published As

Publication number Publication date
KR0141982B1 (ko) 1999-02-18
EP0372081B1 (en) 1995-08-23
JPH01220706A (ja) 1989-09-04
DE68923934D1 (de) 1995-09-28
EP0372081A1 (en) 1990-06-13
KR900700699A (ko) 1990-08-16
EP0372081A4 (enExample) 1994-03-16
WO1989008190A1 (fr) 1989-09-08
US5077974A (en) 1992-01-07

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Legal Events

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