JPS57243A - Independent circuit for slewing of oil-pressure shovel - Google Patents
Independent circuit for slewing of oil-pressure shovelInfo
- Publication number
- JPS57243A JPS57243A JP7239480A JP7239480A JPS57243A JP S57243 A JPS57243 A JP S57243A JP 7239480 A JP7239480 A JP 7239480A JP 7239480 A JP7239480 A JP 7239480A JP S57243 A JPS57243 A JP S57243A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- switch valve
- pressure
- pilot
- slewing motor
- 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
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To smoothly turn a slewing motor of an oil-pressure shovel even when an arm cylinder, etc., are operated concurrently by breaking a pilot switch valve when the operating pressure of the slewing motor is above a certain value.
CONSTITUTION: In case where the slewing motor 2 and the arm cylinder 6 are concurrently operated, the oil of the first oil-pressure pump 1 operates the slewing motor 2 by operation of a switch valve 3, at the same time pilot oil actuates a pilot switch valve 13, and oil paths 14 and 15 leading to the arm cylinder 6 are intercepted. Accordingly, the oil of the first oil-pressure pump does not flow in the arm cylinder 6, and the slewing motor 2 is operated by the first oil-pressure pump alone to start its smooth turning. On the other hand, the switch valve 20 is switched by a switch valve 7, pilot oil from an auxiliary oil-pressure pump 22 switches a pilot switch valve 9, and the oil of the second oil-pressure pump 8 flows to a cyliner 6. When the pressure of oil acting on the switch valve 13 is lowered to less than a certain value, the switch valve 13 is restored to its original condition, oil of the pump 1 partly flowd to the cylinder 6, and the cylinder 6 is operated with fast speeds by the combined action of oil form the pump 8.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7239480A JPS57243A (en) | 1980-05-29 | 1980-05-29 | Independent circuit for slewing of oil-pressure shovel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7239480A JPS57243A (en) | 1980-05-29 | 1980-05-29 | Independent circuit for slewing of oil-pressure shovel |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58168259A Division JPS5980509A (en) | 1983-09-14 | 1983-09-14 | Operation circuit for plural fluid pressure actuator |
| JP58168258A Division JPS5980508A (en) | 1983-09-14 | 1983-09-14 | Operation circuit for plural fluid-pressure actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57243A true JPS57243A (en) | 1982-01-05 |
| JPS6232295B2 JPS6232295B2 (en) | 1987-07-14 |
Family
ID=13488004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7239480A Granted JPS57243A (en) | 1980-05-29 | 1980-05-29 | Independent circuit for slewing of oil-pressure shovel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57243A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61133102U (en) * | 1985-02-07 | 1986-08-20 |
-
1980
- 1980-05-29 JP JP7239480A patent/JPS57243A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61133102U (en) * | 1985-02-07 | 1986-08-20 | ||
| JPH0416002Y2 (en) * | 1985-02-07 | 1992-04-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6232295B2 (en) | 1987-07-14 |
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