JPS5690104A - Controller for cylinder stroke of fluid pressure cylinder - Google Patents
Controller for cylinder stroke of fluid pressure cylinderInfo
- Publication number
- JPS5690104A JPS5690104A JP16662179A JP16662179A JPS5690104A JP S5690104 A JPS5690104 A JP S5690104A JP 16662179 A JP16662179 A JP 16662179A JP 16662179 A JP16662179 A JP 16662179A JP S5690104 A JPS5690104 A JP S5690104A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- pressure
- port
- piston
- cylinder
- 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
Abstract
PURPOSE: To prevent damage to the sealing packing of a piston in a fluid pressure cylinder by returning the oil flowing in through the high-pressure port to the oil tank immediately before the piston reaches the maximum position of its extension in the fluid pressure cylinder so that the piston never passes the low-pressure port.
CONSTITUTION: A suction port 12a of a pump 12 is connected to an oil tank 13 while a discharge port 12b of the pump 12 is connected through a directional control valve 14 to a high-pressure port 6 of an oil-pressure cylinder 1, and the high-pressure port 6 and the oil tank 13 are connected to each other through a pilot operated releif valve 23. Moreover, a low-pressure port 9 of the oil-pressure cylinder 1 and the oil tank 13 are connected to each other and the oil-pressure cylinder 1 is provided with an end part 8, which is connected to a pilot port 23a. When the directional control valve 14 is operated to supply pressure oil from the high-pressure port 6 to a head chamber 1a and a piston 4 moves and reaches near the maximum position of its extension in the oil-pressure cylinder 1, the piston 4 blocks in the low-pressure port 9. Accordingly, the pressure oil in the head chamber 1a returns to the oil tank 13, so that a packing 10 never passes the low-pressure port.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16662179A JPS5690104A (en) | 1979-12-20 | 1979-12-20 | Controller for cylinder stroke of fluid pressure cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16662179A JPS5690104A (en) | 1979-12-20 | 1979-12-20 | Controller for cylinder stroke of fluid pressure cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5690104A true JPS5690104A (en) | 1981-07-22 |
Family
ID=15834682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16662179A Pending JPS5690104A (en) | 1979-12-20 | 1979-12-20 | Controller for cylinder stroke of fluid pressure cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5690104A (en) |
-
1979
- 1979-12-20 JP JP16662179A patent/JPS5690104A/en active Pending
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