JPS57100235A - Fluid pressure circuit for working machine - Google Patents

Fluid pressure circuit for working machine

Info

Publication number
JPS57100235A
JPS57100235A JP17484380A JP17484380A JPS57100235A JP S57100235 A JPS57100235 A JP S57100235A JP 17484380 A JP17484380 A JP 17484380A JP 17484380 A JP17484380 A JP 17484380A JP S57100235 A JPS57100235 A JP S57100235A
Authority
JP
Japan
Prior art keywords
actuator
fluid pressure
moving part
working machine
pump
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
JP17484380A
Other languages
Japanese (ja)
Inventor
Shigeru Yuki
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP17484380A priority Critical patent/JPS57100235A/en
Publication of JPS57100235A publication Critical patent/JPS57100235A/en
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
    • E02F9/2292—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)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To increase the driving force of a working machine by using a system in which the third fluid pressure actuator driving the first moving part is provided in parallel with the first actuator and the third control valve for the third actuator is connected to the second pump. CONSTITUTION:The third fluid pressure actuator 10 driving the first moving part 8 is provided in parallel with the first actuator 9, the third control valve 21 for the third actuator 10 is connected to the second pump P2, and a tandem valve 19 by which only when the second control valve 19 for the second actuator 12 is in stop position, a pressure fluid is supplied from the second pump P2 is made up. By this, when the first moving part 8 is in single operation, the first and third actuators 9 and 10 are driven on each line by the first and second pumps P1 and P2, so that the moving part 8 can be strongly driven. Also, since the valve 21 is of a tandem type, the needs for specific circuit switching operation can be eliminated when switching composite operation and single operation.
JP17484380A 1980-12-10 1980-12-10 Fluid pressure circuit for working machine Pending JPS57100235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17484380A JPS57100235A (en) 1980-12-10 1980-12-10 Fluid pressure circuit for working machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17484380A JPS57100235A (en) 1980-12-10 1980-12-10 Fluid pressure circuit for working machine

Publications (1)

Publication Number Publication Date
JPS57100235A true JPS57100235A (en) 1982-06-22

Family

ID=15985620

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17484380A Pending JPS57100235A (en) 1980-12-10 1980-12-10 Fluid pressure circuit for working machine

Country Status (1)

Country Link
JP (1) JPS57100235A (en)

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