JPS563302A - Automatic piston stroke switching device for main fluid pressure cylinder and auxiliary fluid pressure cylinder - Google Patents
Automatic piston stroke switching device for main fluid pressure cylinder and auxiliary fluid pressure cylinderInfo
- Publication number
- JPS563302A JPS563302A JP7775879A JP7775879A JPS563302A JP S563302 A JPS563302 A JP S563302A JP 7775879 A JP7775879 A JP 7775879A JP 7775879 A JP7775879 A JP 7775879A JP S563302 A JPS563302 A JP S563302A
- Authority
- JP
- Japan
- Prior art keywords
- fluid pressure
- pressure cylinder
- main hydraulic
- switching device
- auxiliary fluid
- 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
- 239000012530 fluid Substances 0.000 title abstract 6
- 238000000605 extraction Methods 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
Landscapes
- Reciprocating Pumps (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To miniaturize a device and to reduce an energy loss, by a method wherein fluid pressure extraction ports made in stroke ends of auxiliary fluid pressure cylinders are connected to control pressure sockets of a switch valve for a main hydraulic cylinder through the medium of pilot switch valves.
CONSTITUTION: Fluid pressure extraction ports 8L4 and 8R4 made in stroke ends of auxiliary fluid pressure cylinders 8L and 8R are connected to control pressure sockets 9L and 9R of a switch valve 9 for main hydraulic cylinder through the medium of pilot switch valves 17L and 17R. This permits the reciprocating movement of main hydraulic cylinders 4L and 4R without the need for a balance piston type sequence valve, a pressure accumulator, and a check valve. Thereby a device can be miniaturized and a production cost can be reduced. Besides, this eliminates a pressure loss resulting from the existence of the aforesaid valves, and thus, an energy loss can be reduced.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7775879A JPS563302A (en) | 1979-06-20 | 1979-06-20 | Automatic piston stroke switching device for main fluid pressure cylinder and auxiliary fluid pressure cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7775879A JPS563302A (en) | 1979-06-20 | 1979-06-20 | Automatic piston stroke switching device for main fluid pressure cylinder and auxiliary fluid pressure cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS563302A true JPS563302A (en) | 1981-01-14 |
Family
ID=13642819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7775879A Pending JPS563302A (en) | 1979-06-20 | 1979-06-20 | Automatic piston stroke switching device for main fluid pressure cylinder and auxiliary fluid pressure cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS563302A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5866185U (en) * | 1981-10-29 | 1983-05-06 | 株式会社新潟鐵工所 | Drive operation device for flow path switching valve |
| JPH02119443U (en) * | 1989-03-06 | 1990-09-26 | ||
| CN104074703A (en) * | 2014-07-04 | 2014-10-01 | 徐州徐工施维英机械有限公司 | Positive-reverse switchover hydraulic system for concrete pump, and concrete pump truck |
-
1979
- 1979-06-20 JP JP7775879A patent/JPS563302A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5866185U (en) * | 1981-10-29 | 1983-05-06 | 株式会社新潟鐵工所 | Drive operation device for flow path switching valve |
| JPH02119443U (en) * | 1989-03-06 | 1990-09-26 | ||
| CN104074703A (en) * | 2014-07-04 | 2014-10-01 | 徐州徐工施维英机械有限公司 | Positive-reverse switchover hydraulic system for concrete pump, and concrete pump truck |
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