JPS56109904A - Hydraulic control circuit for hydraulic cylinder - Google Patents
Hydraulic control circuit for hydraulic cylinderInfo
- Publication number
- JPS56109904A JPS56109904A JP938180A JP938180A JPS56109904A JP S56109904 A JPS56109904 A JP S56109904A JP 938180 A JP938180 A JP 938180A JP 938180 A JP938180 A JP 938180A JP S56109904 A JPS56109904 A JP S56109904A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- direction control
- oil
- flow distributing
- branched pipes
- 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
Landscapes
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To control the extending and retraction of at least four hydraulic cylinders accurately in synchronization without relation to the change in load pressure and the oil temperature in the apparatus for hoisting and lowering the heavy materials such as a turning body and the like of a crane truck by controlling the extension and retraction of said hydraulic cylinders.
CONSTITUTION: Between a main direction control valve 8 in an extending-side driving circuit 11 for four jack cylinders 6aW6d and the first and second direction control valves 14 and 15, is provided the first flow distributing and collecting valve 21 which combines the returning oil from front and rear pipes 12 and 13 to the driving circuit 11. Between said valve 21 and the first direction control valve 14, is provided the second flow distributing and combining valve 22 which distributes the oil in the front pipe 12 to branched pipes 12a and 12b are combines the returning oil from the branched pipes 12a and 12b to the front pipe 12. Furthermore, between the valve 21 and the second direction control valve 15, is provided the third flow distributing and combining valve 23 for branched pipes 13c and 13d for the similar function.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP938180A JPS56109904A (en) | 1980-01-31 | 1980-01-31 | Hydraulic control circuit for hydraulic cylinder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP938180A JPS56109904A (en) | 1980-01-31 | 1980-01-31 | Hydraulic control circuit for hydraulic cylinder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56109904A true JPS56109904A (en) | 1981-08-31 |
Family
ID=11718868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP938180A Pending JPS56109904A (en) | 1980-01-31 | 1980-01-31 | Hydraulic control circuit for hydraulic cylinder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56109904A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61103003A (en) * | 1984-10-24 | 1986-05-21 | Hitachi Constr Mach Co Ltd | Control circuit of hydraulic cylinder |
CN102287411A (en) * | 2011-09-23 | 2011-12-21 | 徐州重型机械有限公司 | Hydraulic control valve, dual-cylinder stretching system and high-altitude job engineering machine |
CN102518837A (en) * | 2012-01-06 | 2012-06-27 | 徐州重型机械有限公司 | High-precision flow distributing and collecting valve and crane |
CN102582425A (en) * | 2011-12-20 | 2012-07-18 | 徐州重型机械有限公司 | Walking hydraulic control system and self-walking type engineering machinery utilizing same |
CN104500465A (en) * | 2014-11-28 | 2015-04-08 | 宁波中意液压马达有限公司 | Hydraulic chassis driving system of multifunctional agricultural locomotive |
-
1980
- 1980-01-31 JP JP938180A patent/JPS56109904A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61103003A (en) * | 1984-10-24 | 1986-05-21 | Hitachi Constr Mach Co Ltd | Control circuit of hydraulic cylinder |
CN102287411A (en) * | 2011-09-23 | 2011-12-21 | 徐州重型机械有限公司 | Hydraulic control valve, dual-cylinder stretching system and high-altitude job engineering machine |
CN102582425A (en) * | 2011-12-20 | 2012-07-18 | 徐州重型机械有限公司 | Walking hydraulic control system and self-walking type engineering machinery utilizing same |
CN102582425B (en) * | 2011-12-20 | 2015-06-17 | 徐州重型机械有限公司 | Walking hydraulic control system and self-walking type engineering machinery utilizing same |
CN102518837A (en) * | 2012-01-06 | 2012-06-27 | 徐州重型机械有限公司 | High-precision flow distributing and collecting valve and crane |
CN104500465A (en) * | 2014-11-28 | 2015-04-08 | 宁波中意液压马达有限公司 | Hydraulic chassis driving system of multifunctional agricultural locomotive |
CN104500465B (en) * | 2014-11-28 | 2017-01-04 | 宁波中意液压马达有限公司 | Multifunctional agricultural locomotive fluid pressure underpan drive system |
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