JPS5781536A - Turnable oil-pressure closed circuit for construction machinery - Google Patents
Turnable oil-pressure closed circuit for construction machineryInfo
- Publication number
- JPS5781536A JPS5781536A JP15578380A JP15578380A JPS5781536A JP S5781536 A JPS5781536 A JP S5781536A JP 15578380 A JP15578380 A JP 15578380A JP 15578380 A JP15578380 A JP 15578380A JP S5781536 A JPS5781536 A JP S5781536A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- pilot
- pressure
- valve
- closed
- 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
Abstract
PURPOSE: To make easier the operation of control on construction machinery by a method in which a turnable oil-pressure circuit is closed when a turning oil- pressure motor is stopped, and the turning oil-pressure motor is turned so that a hold valve is closed by a pilot pressure.
CONSTITUTION: A hold valve 20 by which the main circuit is closed at the position A and a pipeline on a turning oil-pressure motor 3 is blocked at the position B is provided, and higher pilot pressure for the inclined angle control mechanism 18 of a variable capacity type oil-pressure pump 2 is supplied through a shuttle valve 21 to the pilot port of the hold valve 20. And, a check valve 23 is provided to the first pilot pipeline connecting the shuttle valve 21 with the pilot port of the hold valve 20, and the second pilot circuit 24 is provided between the check valve 23 and the shuttle valve 21. When the inclined angle of the oil-pressure pump 2 is 0, the second pipeline 24 is opened, but when the inclined angle is other than 0, the pilot pipeline 24 is closed.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15578380A JPS5781536A (en) | 1980-11-07 | 1980-11-07 | Turnable oil-pressure closed circuit for construction machinery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15578380A JPS5781536A (en) | 1980-11-07 | 1980-11-07 | Turnable oil-pressure closed circuit for construction machinery |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5781536A true JPS5781536A (en) | 1982-05-21 |
JPS6315417B2 JPS6315417B2 (en) | 1988-04-05 |
Family
ID=15613311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15578380A Granted JPS5781536A (en) | 1980-11-07 | 1980-11-07 | Turnable oil-pressure closed circuit for construction machinery |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5781536A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6011773A (en) * | 1983-06-30 | 1985-01-22 | Komatsu Ltd | Control unit of hydraulic close circuit |
-
1980
- 1980-11-07 JP JP15578380A patent/JPS5781536A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6011773A (en) * | 1983-06-30 | 1985-01-22 | Komatsu Ltd | Control unit of hydraulic close circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS6315417B2 (en) | 1988-04-05 |
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