JPS56167035A - Hydraulic circuit for hydraulic power shovel - Google Patents

Hydraulic circuit for hydraulic power shovel

Info

Publication number
JPS56167035A
JPS56167035A JP6894480A JP6894480A JPS56167035A JP S56167035 A JPS56167035 A JP S56167035A JP 6894480 A JP6894480 A JP 6894480A JP 6894480 A JP6894480 A JP 6894480A JP S56167035 A JPS56167035 A JP S56167035A
Authority
JP
Japan
Prior art keywords
circuit
control valve
direction control
hydraulic
oil supply
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
JP6894480A
Other languages
Japanese (ja)
Other versions
JPS6238499B2 (en
Inventor
Toichi Hirata
Toshimichi Ikeda
Seiji Tamura
Kuniaki Yoshida
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 JP6894480A priority Critical patent/JPS56167035A/en
Publication of JPS56167035A publication Critical patent/JPS56167035A/en
Publication of JPS6238499B2 publication Critical patent/JPS6238499B2/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

Landscapes

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

Abstract

PURPOSE:To improve the operability at the single operation mode and improve combination operability of the special actuator with other actuators while enabling acceleration of the special actuator in a hydraulic circuit of a hydraulic power shovel with several actuators. CONSTITUTION:An arm direction control valve 11, a boom direction control valve 10, a spiral direction control valve 12 and a direction control valve for left travelling are arranged in one valve block V from the downstream side to make a selector valve group 13, in which a pressure oil supply circuit 26 of a main pump 2 is divided into right and left parallel circuits 124 and 114 and a center bypass circuit 134. A pressure oil supply circuit 27 of an accelerating pump 3 is connected to a center bypass circuit 131 between the control valves. Circuits 120 and 110 with separately connect two ports P1 and P2 of the control valve 11 and pressure oil supply circuits 124 and 114 of the main pump 2 and the circuit 131 are connected together by way of a circuit provided with a check valves 300 and 200 for checking the flow to the center bypass side.
JP6894480A 1980-05-26 1980-05-26 Hydraulic circuit for hydraulic power shovel Granted JPS56167035A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6894480A JPS56167035A (en) 1980-05-26 1980-05-26 Hydraulic circuit for hydraulic power shovel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6894480A JPS56167035A (en) 1980-05-26 1980-05-26 Hydraulic circuit for hydraulic power shovel

Publications (2)

Publication Number Publication Date
JPS56167035A true JPS56167035A (en) 1981-12-22
JPS6238499B2 JPS6238499B2 (en) 1987-08-18

Family

ID=13388278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6894480A Granted JPS56167035A (en) 1980-05-26 1980-05-26 Hydraulic circuit for hydraulic power shovel

Country Status (1)

Country Link
JP (1) JPS56167035A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58137104U (en) * 1982-03-10 1983-09-14 東芝機械株式会社 composite control valve
JP2021025545A (en) * 2019-07-31 2021-02-22 ナブテスコ株式会社 Fluid control valve, fluid system, and construction machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58137104U (en) * 1982-03-10 1983-09-14 東芝機械株式会社 composite control valve
JP2021025545A (en) * 2019-07-31 2021-02-22 ナブテスコ株式会社 Fluid control valve, fluid system, and construction machine

Also Published As

Publication number Publication date
JPS6238499B2 (en) 1987-08-18

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