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JPS57127026A - Hydraulic circuit for hydraulic shovel - Google Patents

Hydraulic circuit for hydraulic shovel

Info

Publication number
JPS57127026A
JPS57127026A JP1013081A JP1013081A JPS57127026A JP S57127026 A JPS57127026 A JP S57127026A JP 1013081 A JP1013081 A JP 1013081A JP 1013081 A JP1013081 A JP 1013081A JP S57127026 A JPS57127026 A JP S57127026A
Authority
JP
Japan
Prior art keywords
cylinder
hydraulic
switch valves
direction switch
arm
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
JP1013081A
Other languages
Japanese (ja)
Other versions
JPS6245927B2 (en
Inventor
Takeshi Furuichi
Kenzo Yanagibashi
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 JP1013081A priority Critical patent/JPS57127026A/en
Publication of JPS57127026A publication Critical patent/JPS57127026A/en
Publication of JPS6245927B2 publication Critical patent/JPS6245927B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)

Abstract

PURPOSE:To enable the use of 100% of a total horse power in case each cylinder is independently operated in a direction of expansion of a rod, by a method wherein at least either of an arm cylinder and a bucket cylinder is connected to both direction switch valves of two switch valve groups. CONSTITUTION:A bottom side oil chamber 5a in an arm cylinder 5 is connected to both switching boards 11D1, 12D1 of direction switch valves 11D and 12D of two switch valve groups 11 and 12. A rod side oil chamber 5b is coupled to both switching boards 11D2 and 12D2. Other actuators are connected to other direction switch valves 11A-11C, 12A-12C. A shuttle valve 14 is built into an arm pilot valve 13, and a hydraulic pilot signal is sent to a regulator for the direction switch valves 11D and 12D and variable hydraulic pumps 7-10 for control. The circuit permits the use of 100% of a total horse power in case the arm cylinder or a bucket cylinder is operated individually.
JP1013081A 1981-01-28 1981-01-28 Hydraulic circuit for hydraulic shovel Granted JPS57127026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1013081A JPS57127026A (en) 1981-01-28 1981-01-28 Hydraulic circuit for hydraulic shovel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1013081A JPS57127026A (en) 1981-01-28 1981-01-28 Hydraulic circuit for hydraulic shovel

Publications (2)

Publication Number Publication Date
JPS57127026A true JPS57127026A (en) 1982-08-07
JPS6245927B2 JPS6245927B2 (en) 1987-09-29

Family

ID=11741698

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1013081A Granted JPS57127026A (en) 1981-01-28 1981-01-28 Hydraulic circuit for hydraulic shovel

Country Status (1)

Country Link
JP (1) JPS57127026A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61261536A (en) * 1985-05-15 1986-11-19 Hitachi Constr Mach Co Ltd Oil-pressure circuit for oil-pressure type working machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61261536A (en) * 1985-05-15 1986-11-19 Hitachi Constr Mach Co Ltd Oil-pressure circuit for oil-pressure type working machine
JPH0530943B2 (en) * 1985-05-15 1993-05-11 Hitachi Construction Machinery

Also Published As

Publication number Publication date
JPS6245927B2 (en) 1987-09-29

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