JPS6480629A - Hydraulic circuit of construction equipment - Google Patents

Hydraulic circuit of construction equipment

Info

Publication number
JPS6480629A
JPS6480629A JP23773187A JP23773187A JPS6480629A JP S6480629 A JPS6480629 A JP S6480629A JP 23773187 A JP23773187 A JP 23773187A JP 23773187 A JP23773187 A JP 23773187A JP S6480629 A JPS6480629 A JP S6480629A
Authority
JP
Japan
Prior art keywords
pipe lines
pumps
selector valves
flow regulators
receiving sections
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
JP23773187A
Other languages
Japanese (ja)
Inventor
Masaaki Tono
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.)
Kobelco Construction Machinery Co Ltd
Original Assignee
Yutani Heavy Industries 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 Yutani Heavy Industries Ltd filed Critical Yutani Heavy Industries Ltd
Priority to JP23773187A priority Critical patent/JPS6480629A/en
Publication of JPS6480629A publication Critical patent/JPS6480629A/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
    • E02F9/2221—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

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 improve the operational efficiency by providing to the place close to a driver's seat by a means to be given to the receiving sections of a fine controller provided to the plural number of the flow regulators of the hydraulic pumps by selecting a signal from the outside simultaneously or an optional receiving section. CONSTITUTION:The discharge oil from a pilot pump 3 is connected to the pipe lines 21-23, and the first and the second pumps 1 and 2, the receiving sections (c) and (d) for a fine controller of the flow regulators 26 and 27 and the outlet ports of the selector valves 19 and 20 are connected at the pipe lines 24 and 25. And, the selector valves 19 and 20 are switched to C position to cut off the pipe lines 22 and 23, and the pipe lines 22-25 are interconnected by switching to D position. Both the first and the second pumps 1 and 2 are supplied to the groups of selector valves A and B having a negative control function only and have each cylinder 12, 11 and 9 of a boom, a bucket and an arm belonging thereto display their full capabilities. Accordingly, a safe and accurate working can be accomplished.
JP23773187A 1987-09-22 1987-09-22 Hydraulic circuit of construction equipment Pending JPS6480629A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23773187A JPS6480629A (en) 1987-09-22 1987-09-22 Hydraulic circuit of construction equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23773187A JPS6480629A (en) 1987-09-22 1987-09-22 Hydraulic circuit of construction equipment

Publications (1)

Publication Number Publication Date
JPS6480629A true JPS6480629A (en) 1989-03-27

Family

ID=17019646

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23773187A Pending JPS6480629A (en) 1987-09-22 1987-09-22 Hydraulic circuit of construction equipment

Country Status (1)

Country Link
JP (1) JPS6480629A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5587865A (en) * 1978-12-27 1980-07-03 Komatsu Ltd Control circuit of variable capacity pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5587865A (en) * 1978-12-27 1980-07-03 Komatsu Ltd Control circuit of variable capacity pump

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