JPS55145219A - Hydraulic circuit of hydraulic excavator - Google Patents

Hydraulic circuit of hydraulic excavator

Info

Publication number
JPS55145219A
JPS55145219A JP5153679A JP5153679A JPS55145219A JP S55145219 A JPS55145219 A JP S55145219A JP 5153679 A JP5153679 A JP 5153679A JP 5153679 A JP5153679 A JP 5153679A JP S55145219 A JPS55145219 A JP S55145219A
Authority
JP
Japan
Prior art keywords
pump
pumps
passage
discharge
hydraulic
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
JP5153679A
Other languages
Japanese (ja)
Other versions
JPS6229571B2 (en
Inventor
Yukio Moriya
Kazuhiro 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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP5153679A priority Critical patent/JPS55145219A/en
Publication of JPS55145219A publication Critical patent/JPS55145219A/en
Publication of JPS6229571B2 publication Critical patent/JPS6229571B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To enable a vehicle to go straight irrespective of difference of discharge between variable double pumps on one side and on the other side by a method wherein two double pumps and other two double pumps are connected with one another so as to control the discharge instataneously.
CONSTITUTION: The 1st variable double pump P' consisting of the 1st and 2nd pumps P1, P2, and the 2nd variable double pump P" consisting of the 3rd and 4th pumps P3, P4 are connected respectively with an engine E. The discharge passage 3 of the 1st pump P1 is connected with the 1st main passage 51 through the 1st rotary valve 41, the discharge passage 6 of the 2nd pump P2 is connected with the 2nd main passage 52 through the 2nd rotary valve 42, the discharge passage 7 of the 3rd pump P3 and the discharge passage 8 of the 4th pump P4 are connected respectively with the 1st main passage 51 and the 2nd main passage 52. On the 1st and 2nd main passages 51, 52 respectively are provided valves which supply and control hydraulic pressure to actuators such as a running motor 14, an arm cylinder 20, a boom cylinder 31, etc.
COPYRIGHT: (C)1980,JPO&Japio
JP5153679A 1979-04-27 1979-04-27 Hydraulic circuit of hydraulic excavator Granted JPS55145219A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5153679A JPS55145219A (en) 1979-04-27 1979-04-27 Hydraulic circuit of hydraulic excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5153679A JPS55145219A (en) 1979-04-27 1979-04-27 Hydraulic circuit of hydraulic excavator

Publications (2)

Publication Number Publication Date
JPS55145219A true JPS55145219A (en) 1980-11-12
JPS6229571B2 JPS6229571B2 (en) 1987-06-26

Family

ID=12889739

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5153679A Granted JPS55145219A (en) 1979-04-27 1979-04-27 Hydraulic circuit of hydraulic excavator

Country Status (1)

Country Link
JP (1) JPS55145219A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531366A (en) * 1981-05-29 1985-07-30 Kabushiki Kaisha Komatsu Seisakusho Hydraulic circuit system for use in swivel type excavators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531366A (en) * 1981-05-29 1985-07-30 Kabushiki Kaisha Komatsu Seisakusho Hydraulic circuit system for use in swivel type excavators

Also Published As

Publication number Publication date
JPS6229571B2 (en) 1987-06-26

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