JPS5487355A - Method of controlling variable capacity oil hydraulic motor in service machine - Google Patents
Method of controlling variable capacity oil hydraulic motor in service machineInfo
- Publication number
- JPS5487355A JPS5487355A JP15452477A JP15452477A JPS5487355A JP S5487355 A JPS5487355 A JP S5487355A JP 15452477 A JP15452477 A JP 15452477A JP 15452477 A JP15452477 A JP 15452477A JP S5487355 A JPS5487355 A JP S5487355A
- Authority
- JP
- Japan
- Prior art keywords
- oil hydraulic
- piston
- capacity oil
- spring
- 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.)
- Granted
Links
Abstract
PURPOSE: To prevent overloading of the service machine with the input horsepowder to all oil hydraulic motors made constant by causing the operating force of a constant capacity oil hydraulic motor to act upon a piston section and reducing the average value of the operating pressures of variable capacity oil hydraulic motors.
CONSTITUTION: A servo-valve 8 is provided with a first chamber 12 for receiving the discharge pressure of a pump P1 and a second chamber 13 for receiving the discharge pressure of a pump P2, and the return pressure of the pump P3 is coupled through a line 11 to a chamber 18 between lands 15 and 16 of a piston 14, with lines 6 and 7 opened and closed by the respective lands 15 and 16. On the left side of the piston 14 a spring support 19 is provided to support a spring 21, with the other end thereof supported by a spring support 20 interlocked to the piston. Thus, a piston 22 assumes a position determined by a spring 23 and the discharge pressure from a pump P3, and the set pressure of the spring 21 is changed by the operating pressure of a constant capacity oil hydraulic motor C3 to vary angles of variable capacity oil hydraulic motors V1 and V2 with a servo-valve 3.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52154524A JPS6038586B2 (en) | 1977-12-23 | 1977-12-23 | Control method for variable displacement hydraulic motor in work equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52154524A JPS6038586B2 (en) | 1977-12-23 | 1977-12-23 | Control method for variable displacement hydraulic motor in work equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5487355A true JPS5487355A (en) | 1979-07-11 |
JPS6038586B2 JPS6038586B2 (en) | 1985-09-02 |
Family
ID=15586133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52154524A Expired JPS6038586B2 (en) | 1977-12-23 | 1977-12-23 | Control method for variable displacement hydraulic motor in work equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6038586B2 (en) |
-
1977
- 1977-12-23 JP JP52154524A patent/JPS6038586B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6038586B2 (en) | 1985-09-02 |
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