JPH0128174B2 - - Google Patents

Info

Publication number
JPH0128174B2
JPH0128174B2 JP56079350A JP7935081A JPH0128174B2 JP H0128174 B2 JPH0128174 B2 JP H0128174B2 JP 56079350 A JP56079350 A JP 56079350A JP 7935081 A JP7935081 A JP 7935081A JP H0128174 B2 JPH0128174 B2 JP H0128174B2
Authority
JP
Japan
Prior art keywords
hydraulic
switching valve
right travel
valve
switching
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
Application number
JP56079350A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57197333A (en
Inventor
Toichi Hirata
Toshimichi Ikeda
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
Priority to JP7935081A priority Critical patent/JPS57197333A/ja
Publication of JPS57197333A publication Critical patent/JPS57197333A/ja
Publication of JPH0128174B2 publication Critical patent/JPH0128174B2/ja
Granted 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
    • E02F9/2292—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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
JP7935081A 1981-05-27 1981-05-27 Oil-pressure circuit for oil-pressure shovel Granted JPS57197333A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7935081A JPS57197333A (en) 1981-05-27 1981-05-27 Oil-pressure circuit for oil-pressure shovel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7935081A JPS57197333A (en) 1981-05-27 1981-05-27 Oil-pressure circuit for oil-pressure shovel

Publications (2)

Publication Number Publication Date
JPS57197333A JPS57197333A (en) 1982-12-03
JPH0128174B2 true JPH0128174B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1989-06-01

Family

ID=13687447

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7935081A Granted JPS57197333A (en) 1981-05-27 1981-05-27 Oil-pressure circuit for oil-pressure shovel

Country Status (1)

Country Link
JP (1) JPS57197333A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61165429A (ja) * 1985-01-17 1986-07-26 Yutani Juko Kk 建設機械の油圧回路
JPS61165428A (ja) * 1985-01-17 1986-07-26 Yutani Juko Kk 建設機械の油圧回路
JPH0352275Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1985-10-16 1991-11-12
JPS62117923A (ja) * 1985-11-15 1987-05-29 Kobe Steel Ltd 建設機械の走行制御回路
JPH086354B2 (ja) * 1989-10-31 1996-01-24 株式会社小松製作所 油圧式掘削機の油圧回路
JP5528276B2 (ja) 2010-09-21 2014-06-25 株式会社クボタ 作業機の油圧システム
CN103597218B (zh) * 2011-06-09 2016-04-06 沃尔沃建造设备有限公司 用于工程机械的液压系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5152190U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1974-10-19 1976-04-20
JPS5626153Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1976-08-06 1981-06-20
JPS5437038U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1977-08-18 1979-03-10
JPS5752661Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1977-08-19 1982-11-16
JPS585734Y2 (ja) * 1977-11-11 1983-01-31 株式会社クボタ バックホウ兼ド−ザ作業車の流体圧回路
JPS5830865Y2 (ja) * 1978-01-12 1983-07-07 株式会社クボタ ド−ザ作業車の回路

Also Published As

Publication number Publication date
JPS57197333A (en) 1982-12-03

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