JPS5774441A - Construction machinery such as power shovel - Google Patents

Construction machinery such as power shovel

Info

Publication number
JPS5774441A
JPS5774441A JP55151242A JP15124280A JPS5774441A JP S5774441 A JPS5774441 A JP S5774441A JP 55151242 A JP55151242 A JP 55151242A JP 15124280 A JP15124280 A JP 15124280A JP S5774441 A JPS5774441 A JP S5774441A
Authority
JP
Japan
Prior art keywords
revolving
valve
motor
priority
type pressure
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
JP55151242A
Other languages
Japanese (ja)
Inventor
Toshio 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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Daikin Kogyo 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 Daikin Industries Ltd, Daikin Kogyo Co Ltd filed Critical Daikin Industries Ltd
Priority to JP55151242A priority Critical patent/JPS5774441A/en
Publication of JPS5774441A publication Critical patent/JPS5774441A/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

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 enable revolving of a revolving body without interference through the operation of other movement bodies, by a method wherein a priority type pressure compensating valve, which supplies pressure oil from an existing pump with priority to a revolving motor, and feeds a surplus oil to other movement bodies, is mounted. CONSTITUTION:A hydraulic circuit for a power shovel, provided with cylinders 19, 20, and 30 moving a bucket C to a desired position and a revolving motor 7 moving a revolving body D, is equipped with two variable volume type pumps 1, 1' and two switching valve blocks (a) and (b). A priority type pressure compensating valve 37, which feeds a first pump discharge amount preferently to the revolving motor 7 and supplies only a surplus oil to a right running motor 14, a boom cylinder 20, or an arm cylinder 19, is mounted at the first block (a). A decomposition type pressure compensating valve 42 is installed at a branch pressure line 8 branching from the valve 37. Meanwhile, compensating valves 37' and 42' are mounted at the block (b) in an approximately similar manner.
JP55151242A 1980-10-27 1980-10-27 Construction machinery such as power shovel Pending JPS5774441A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55151242A JPS5774441A (en) 1980-10-27 1980-10-27 Construction machinery such as power shovel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55151242A JPS5774441A (en) 1980-10-27 1980-10-27 Construction machinery such as power shovel

Publications (1)

Publication Number Publication Date
JPS5774441A true JPS5774441A (en) 1982-05-10

Family

ID=15514357

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55151242A Pending JPS5774441A (en) 1980-10-27 1980-10-27 Construction machinery such as power shovel

Country Status (1)

Country Link
JP (1) JPS5774441A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57140434A (en) * 1981-02-20 1982-08-31 Kobe Steel Ltd Oil-pressure circuit for oil-pressure shovel
JPS58213927A (en) * 1982-06-07 1983-12-13 Daikin Ind Ltd Construction machine such as power shovel
JP2014149044A (en) * 2013-02-01 2014-08-21 Toshiba Mach Co Ltd Hydraulic control system, and construction machine having the same mounted thereon

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5151681A (en) * 1974-10-29 1976-05-07 Daikin Ind Ltd RYUTAISOCHI
JPS5151682A (en) * 1974-10-29 1976-05-07 Daikin Ind Ltd RYUTAISOCHI
JPS5151683A (en) * 1974-10-29 1976-05-07 Daikin Ind Ltd
JPS5266165A (en) * 1975-11-28 1977-06-01 Yutani Juko Kk Hydraulic circuit of excavator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5151681A (en) * 1974-10-29 1976-05-07 Daikin Ind Ltd RYUTAISOCHI
JPS5151682A (en) * 1974-10-29 1976-05-07 Daikin Ind Ltd RYUTAISOCHI
JPS5151683A (en) * 1974-10-29 1976-05-07 Daikin Ind Ltd
JPS5266165A (en) * 1975-11-28 1977-06-01 Yutani Juko Kk Hydraulic circuit of excavator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57140434A (en) * 1981-02-20 1982-08-31 Kobe Steel Ltd Oil-pressure circuit for oil-pressure shovel
JPS6330452B2 (en) * 1981-02-20 1988-06-17 Kobe Steel Ltd
JPS58213927A (en) * 1982-06-07 1983-12-13 Daikin Ind Ltd Construction machine such as power shovel
JP2014149044A (en) * 2013-02-01 2014-08-21 Toshiba Mach Co Ltd Hydraulic control system, and construction machine having the same mounted thereon

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