JPS5667027A - Hydraulic circuit of hydraulic shovel - Google Patents

Hydraulic circuit of hydraulic shovel

Info

Publication number
JPS5667027A
JPS5667027A JP14275779A JP14275779A JPS5667027A JP S5667027 A JPS5667027 A JP S5667027A JP 14275779 A JP14275779 A JP 14275779A JP 14275779 A JP14275779 A JP 14275779A JP S5667027 A JPS5667027 A JP S5667027A
Authority
JP
Japan
Prior art keywords
selection valve
hydraulic
shovel
hydraulic pump
running
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.)
Granted
Application number
JP14275779A
Other languages
Japanese (ja)
Other versions
JPS6229570B2 (en
Inventor
Yusaku Nozawa
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 JP14275779A priority Critical patent/JPS5667027A/en
Publication of JPS5667027A publication Critical patent/JPS5667027A/en
Publication of JPS6229570B2 publication Critical patent/JPS6229570B2/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
    • E02F9/2253—Controlling the travelling speed of vehicles, e.g. adjusting travelling speed according to implement loads, control of hydrostatic transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To prevent the deterioration of the operability of the shovel by connecting either a running selection valve or an arm selection valve to a different hydraulic pump corresponding to the operational condition of a swing selection valve. CONSTITUTION:In the hydraulic circuit of the hydraulic shovel, the swing selection valve 9 is connected to the 1st hydraulic pump 2, while the 2nd right-running selection valve 12 to the 2nd hydraulic pump 3. When the swing selection valve 9 is positioned at neutral, either one of the 1st left-running selection valve 6 or the arm selection valve 7 or both of them are connected to the 1st hydraulic pump 2. When the swing selection valve 9 is at the position of operation, the 1st left-running selection valve 6 and the arm selection valve 7 are connected to the 2nd hydraulic pump 3. Even when the swinging and other operations of the shovel are conducted simultaneously, neither change in the speed of swinging and that of an arm nor zigzag running takes place, and no deterioration of the operability is also caused.
JP14275779A 1979-11-06 1979-11-06 Hydraulic circuit of hydraulic shovel Granted JPS5667027A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14275779A JPS5667027A (en) 1979-11-06 1979-11-06 Hydraulic circuit of hydraulic shovel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14275779A JPS5667027A (en) 1979-11-06 1979-11-06 Hydraulic circuit of hydraulic shovel

Publications (2)

Publication Number Publication Date
JPS5667027A true JPS5667027A (en) 1981-06-05
JPS6229570B2 JPS6229570B2 (en) 1987-06-26

Family

ID=15322859

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14275779A Granted JPS5667027A (en) 1979-11-06 1979-11-06 Hydraulic circuit of hydraulic shovel

Country Status (1)

Country Link
JP (1) JPS5667027A (en)

Also Published As

Publication number Publication date
JPS6229570B2 (en) 1987-06-26

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