JPS55108538A - Hydraulic circuit for hydraulic shovel - Google Patents

Hydraulic circuit for hydraulic shovel

Info

Publication number
JPS55108538A
JPS55108538A JP1631679A JP1631679A JPS55108538A JP S55108538 A JPS55108538 A JP S55108538A JP 1631679 A JP1631679 A JP 1631679A JP 1631679 A JP1631679 A JP 1631679A JP S55108538 A JPS55108538 A JP S55108538A
Authority
JP
Japan
Prior art keywords
turning
valve
discharge oil
pump
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.)
Pending
Application number
JP1631679A
Other languages
Japanese (ja)
Inventor
Atsuro Akiyama
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP1631679A priority Critical patent/JPS55108538A/en
Publication of JPS55108538A publication Critical patent/JPS55108538A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

PURPOSE: To ensure optimum efficient operation of hydraulic circuit by a method wherein the discharge oil of hydraulic pump S are supplied to a given main actuator for turning for example in accordance with the mode of combining actuators for turning, arm operction and boom operction.
CONSTITUTION: The discharge oil of a hydraulic pump P1 is returned to a tank 10 after passing flow control valves 21W24 in the order of mention. In the meanwhile, the discharge oil of a hydraulic pump P2 is fed to the first flow course 61 through the upper position 41a of a preferential valve 41 and returned to the tank 10 after passing flow control valves 43W46 in the order of mention. When wall excavation is made after turning and arm contraction, the flow control valve 43 for turning is transferred to the upper position 43a for example, and the ones 24 and 45 for arm to lower positions 26b and 45b. Consequently, the discharge oil of the pump P1 is fed to the push-side oil chamber of an arm cylinder C2 through circuits 11 and (c). Further, the discharge oil of the pump P2 is fed to a flow course 61 after passing the initial valve 41 and further to a turning motor M3. The discharge pressure gradually raised of the pump P2 is introduced into the lower pilot chamber of the valve 41 to transfer the valve 41 to lower position 41B.
COPYRIGHT: (C)1980,JPO&Japio
JP1631679A 1979-02-14 1979-02-14 Hydraulic circuit for hydraulic shovel Pending JPS55108538A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1631679A JPS55108538A (en) 1979-02-14 1979-02-14 Hydraulic circuit for hydraulic shovel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1631679A JPS55108538A (en) 1979-02-14 1979-02-14 Hydraulic circuit for hydraulic shovel

Publications (1)

Publication Number Publication Date
JPS55108538A true JPS55108538A (en) 1980-08-20

Family

ID=11913094

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1631679A Pending JPS55108538A (en) 1979-02-14 1979-02-14 Hydraulic circuit for hydraulic shovel

Country Status (1)

Country Link
JP (1) JPS55108538A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58172564U (en) * 1982-05-15 1983-11-18 株式会社神崎高級工機製作所 Bucket actuation device for front loaders, etc.
JPS59121061U (en) * 1983-02-04 1984-08-15 新キャタピラ−三菱株式会社 Hydraulic excavator hydraulic circuit
JPS59129954U (en) * 1983-02-16 1984-08-31 セイレイ工業株式会社 Backhoe hydraulic system
JPS59233035A (en) * 1983-06-15 1984-12-27 Kayaba Ind Co Ltd Oil-pressure circuit for construction vehicle
JPS6027165U (en) * 1983-07-29 1985-02-23 新キャタピラ−三菱株式会社 Hydraulic excavator hydraulic circuit
WO2006098085A1 (en) 2005-03-14 2006-09-21 Yanmar Co., Ltd. Hydraulic circuit structure of work vehicle

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6343252Y2 (en) * 1982-05-15 1988-11-11
JPS58172564U (en) * 1982-05-15 1983-11-18 株式会社神崎高級工機製作所 Bucket actuation device for front loaders, etc.
JPS59121061U (en) * 1983-02-04 1984-08-15 新キャタピラ−三菱株式会社 Hydraulic excavator hydraulic circuit
JPH0510041Y2 (en) * 1983-02-04 1993-03-11
JPH0342125Y2 (en) * 1983-02-16 1991-09-04
JPS59129954U (en) * 1983-02-16 1984-08-31 セイレイ工業株式会社 Backhoe hydraulic system
JPS59233035A (en) * 1983-06-15 1984-12-27 Kayaba Ind Co Ltd Oil-pressure circuit for construction vehicle
JPH0413506B2 (en) * 1983-06-15 1992-03-09 Kayaba Industry Co Ltd
JPS6027165U (en) * 1983-07-29 1985-02-23 新キャタピラ−三菱株式会社 Hydraulic excavator hydraulic circuit
JPH0352273Y2 (en) * 1983-07-29 1991-11-12
WO2006098085A1 (en) 2005-03-14 2006-09-21 Yanmar Co., Ltd. Hydraulic circuit structure of work vehicle
EP1889976A1 (en) * 2005-03-14 2008-02-20 Yanmar Co., Ltd. Hydraulic circuit structure of work vehicle
EP1889976A4 (en) * 2005-03-14 2009-03-25 Yanmar Co Ltd Hydraulic circuit structure of work vehicle
US7954315B2 (en) 2005-03-14 2011-06-07 Yanmar Co., Ltd. Hydraulic circuit structure of work vehicle

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