JPS56143806A - Oleo-hydraulic joining circuit - Google Patents
Oleo-hydraulic joining circuitInfo
- Publication number
- JPS56143806A JPS56143806A JP4625980A JP4625980A JPS56143806A JP S56143806 A JPS56143806 A JP S56143806A JP 4625980 A JP4625980 A JP 4625980A JP 4625980 A JP4625980 A JP 4625980A JP S56143806 A JPS56143806 A JP S56143806A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- valve
- capacity variable
- variable pump
- switch
- 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 prevent the cavitation of a capacity variable pump by providing a switch-over valve within a communication pipe and an on-off valve within a connection pipe between an actuator and the capacity variable pump so that a sufficient amount of oil can be supplied to the pump.
CONSTITUTION: Within the communication pipes 21 and 22 is provided the switch- over valve 23 and between an oil pressure motor 9 and the capacity variable pump 8 is provided the on-off valve 20. When the on-off valve 20 opened and the switch- over valve 23 is in position A, the oil pressure motor 9 is driven by the oil discharged out of the capacity variable pump 8. To the contrary, when the on-off valve 20 is closed and the switch-over valve 23 is in position B, the discharged oil is supplied to the connection pipe 5a via the communication pipe 21, thereby increasing the operation speed of an oil pressure cylinder 4. The oil pressure cylinder 4 is driven by the total amount of discharged oil from an oil pressure pump 2 and the capacity variable pump 8. Therefore, the returning oil into the connection pipe 6a is sufficient enough and hence the discharge port 8b of the capacity variable pump 8 is supplied with a sufficient amount of oil.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4625980A JPS595167B2 (en) | 1980-04-10 | 1980-04-10 | hydraulic merging circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4625980A JPS595167B2 (en) | 1980-04-10 | 1980-04-10 | hydraulic merging circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56143806A true JPS56143806A (en) | 1981-11-09 |
JPS595167B2 JPS595167B2 (en) | 1984-02-03 |
Family
ID=12742194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4625980A Expired JPS595167B2 (en) | 1980-04-10 | 1980-04-10 | hydraulic merging circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS595167B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02217529A (en) * | 1989-02-18 | 1990-08-30 | Kubota Ltd | Hydraulic circuit construction of full swiveling type operation car |
-
1980
- 1980-04-10 JP JP4625980A patent/JPS595167B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02217529A (en) * | 1989-02-18 | 1990-08-30 | Kubota Ltd | Hydraulic circuit construction of full swiveling type operation car |
Also Published As
Publication number | Publication date |
---|---|
JPS595167B2 (en) | 1984-02-03 |
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