JPS5614607A - Hydraulic circuit for hydraulic shovel - Google Patents

Hydraulic circuit for hydraulic shovel

Info

Publication number
JPS5614607A
JPS5614607A JP8811179A JP8811179A JPS5614607A JP S5614607 A JPS5614607 A JP S5614607A JP 8811179 A JP8811179 A JP 8811179A JP 8811179 A JP8811179 A JP 8811179A JP S5614607 A JPS5614607 A JP S5614607A
Authority
JP
Japan
Prior art keywords
arm
change
line
over valve
turning motor
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
JP8811179A
Other languages
Japanese (ja)
Inventor
Toichi Hirata
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 JP8811179A priority Critical patent/JPS5614607A/en
Publication of JPS5614607A publication Critical patent/JPS5614607A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (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 achieve an effective utilization of the energy of a motor, by branching the output line of the third pump and communicating the thusformed branch line with a change-over valve of an arm through a throttle valve.
CONSTITUTION: An output line C of the third pump 3 is branched into lines (h) and (i). The line (h) is led to a change-over valve 31 for a turning motor while the line (i) is communicated with a change-over valve 22 for an arm through a throttle valve E. When the turning motor and arm are simultanenously operated, a flow of pressure oil required for the actuation and acceleration of the turning motor is supplied to the turning motor through the line (h) and change-over valve 31 and remaining pressure oil is fed to an arm hydraulic cylinder via the throttle vavle E and change-over valve 22 of the arm. Thus, the turning motor is driven with priority by the pressure oil from the third pump 3 and, at the same time, the actuation speed of the hydraulic cylinder for the arm can be accelerated, resulting in an effective utilization of the energy of the motor.
COPYRIGHT: (C)1981,JPO&Japio
JP8811179A 1979-07-13 1979-07-13 Hydraulic circuit for hydraulic shovel Pending JPS5614607A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8811179A JPS5614607A (en) 1979-07-13 1979-07-13 Hydraulic circuit for hydraulic shovel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8811179A JPS5614607A (en) 1979-07-13 1979-07-13 Hydraulic circuit for hydraulic shovel

Publications (1)

Publication Number Publication Date
JPS5614607A true JPS5614607A (en) 1981-02-12

Family

ID=13933765

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8811179A Pending JPS5614607A (en) 1979-07-13 1979-07-13 Hydraulic circuit for hydraulic shovel

Country Status (1)

Country Link
JP (1) JPS5614607A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57184137A (en) * 1981-05-06 1982-11-12 Hitachi Constr Mach Co Ltd Oil-pressure circuit for oil-pressure working machine
JPS57184136A (en) * 1981-05-06 1982-11-12 Hitachi Constr Mach Co Ltd Oil-pressure circuit for oil-pressure working machine
WO1998012391A1 (en) * 1996-09-19 1998-03-26 Yanmar Diesel Engine Co., Ltd. Hydraulic circuit for turning excavator
JP2013148175A (en) * 2012-01-20 2013-08-01 Kobelco Contstruction Machinery Ltd Hydraulic circuit of construction machine
JP2015148300A (en) * 2014-02-07 2015-08-20 ナブテスコ株式会社 Hydraulic drive device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57184137A (en) * 1981-05-06 1982-11-12 Hitachi Constr Mach Co Ltd Oil-pressure circuit for oil-pressure working machine
JPS57184136A (en) * 1981-05-06 1982-11-12 Hitachi Constr Mach Co Ltd Oil-pressure circuit for oil-pressure working machine
JPH0128177B2 (en) * 1981-05-06 1989-06-01 Hitachi Construction Machinery
WO1998012391A1 (en) * 1996-09-19 1998-03-26 Yanmar Diesel Engine Co., Ltd. Hydraulic circuit for turning excavator
JP2013148175A (en) * 2012-01-20 2013-08-01 Kobelco Contstruction Machinery Ltd Hydraulic circuit of construction machine
JP2015148300A (en) * 2014-02-07 2015-08-20 ナブテスコ株式会社 Hydraulic drive device

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