JPS55145219A - Hydraulic circuit of hydraulic excavator - Google Patents
Hydraulic circuit of hydraulic excavatorInfo
- 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
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
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)
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 |
-
1979
- 1979-04-27 JP JP5153679A patent/JPS55145219A/en active Granted
Cited By (1)
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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