JPS5532817A - Hydraulic circuit for hydraulic shovel - Google Patents
Hydraulic circuit for hydraulic shovelInfo
- Publication number
- JPS5532817A JPS5532817A JP10494378A JP10494378A JPS5532817A JP S5532817 A JPS5532817 A JP S5532817A JP 10494378 A JP10494378 A JP 10494378A JP 10494378 A JP10494378 A JP 10494378A JP S5532817 A JPS5532817 A JP S5532817A
- Authority
- JP
- Japan
- Prior art keywords
- switch valve
- additional
- revolving
- arm
- pump
- 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
Links
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To enable a revolving motion irrespective of loads on an arm and to allow more than a given revolving force required to be obtained, by constituting an additional switch valve so that the valve can be changed-over due to the difference in pressure between at both sides of a throttle located at a pipe passage of an arm hydraulic cylinder.
CONSTITUTION: An additional pump 3a is connected to a prime mover 4, an additional switch valve 30a to the additional pump, an additional revolving switch valve 31a to a revolving hydraulic motor 50, and an additional arm switch valve 32a to an arm hydraulic cylinder 40. The additional revolving switch valve 31a, which is positioned upstream the additional arm 32a, and a revolving switch valve 21 are operated in conjunction with each other by means of a double-drawing mechanism Z, and the additional arm switch valve 32a is changed-over and controlled by virtue of the difference in pressure between at the front and the rear of a throttle E. Throttles F1 and F2 are situated in a pressured oil feed circuit which leads to the switch valve 32a and positions in the switch valve 31a. The pressured oil from a pump 3a is fed to the switch valve 32a through the throttles F1 and F2 by means of the switch valve 31a.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10494378A JPS5532817A (en) | 1978-08-30 | 1978-08-30 | Hydraulic circuit for hydraulic shovel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10494378A JPS5532817A (en) | 1978-08-30 | 1978-08-30 | Hydraulic circuit for hydraulic shovel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5532817A true JPS5532817A (en) | 1980-03-07 |
Family
ID=14394163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10494378A Pending JPS5532817A (en) | 1978-08-30 | 1978-08-30 | Hydraulic circuit for hydraulic shovel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5532817A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59165978U (en) * | 1983-04-22 | 1984-11-07 | 株式会社クボタ | tractor hydraulic circuit |
| US5116186A (en) * | 1988-08-02 | 1992-05-26 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for controlling hydraulic cylinders of a power shovel |
-
1978
- 1978-08-30 JP JP10494378A patent/JPS5532817A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59165978U (en) * | 1983-04-22 | 1984-11-07 | 株式会社クボタ | tractor hydraulic circuit |
| JPH025103Y2 (en) * | 1983-04-22 | 1990-02-07 | ||
| US5116186A (en) * | 1988-08-02 | 1992-05-26 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for controlling hydraulic cylinders of a power shovel |
| US5356259A (en) * | 1988-08-02 | 1994-10-18 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for controlling hydraulic cylinders of a power shovel |
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