JPS5786603A - Hydraulic pressure controlling circuit for hydraulic cylinder - Google Patents
Hydraulic pressure controlling circuit for hydraulic cylinderInfo
- Publication number
- JPS5786603A JPS5786603A JP16143380A JP16143380A JPS5786603A JP S5786603 A JPS5786603 A JP S5786603A JP 16143380 A JP16143380 A JP 16143380A JP 16143380 A JP16143380 A JP 16143380A JP S5786603 A JPS5786603 A JP S5786603A
- Authority
- JP
- Japan
- Prior art keywords
- valves
- change
- valve
- convergence
- divergence
- 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)
- Jib Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To permit extension control of hydrulic cylinders to be synchronized with high accuracy independently of the variation of load and oil temperature by combining three divergence valves and convergence valves, in the apparatus for elevating heavy articles through extension control of at least four hydraulic cylinders.
CONSTITUTION: The hydraulic cylinders 6aW6d for attaching and detaching a swirling body for a lower traveling body are installed at four corners of the upper swirling body in the construction machinery such as a large track crane etc. Respective two cylinders (6a, 6b) and (6c, 6d) in the front and in the rear are connected to a pressure source through solenoid valves (14a, 14b) and (15a, 15b) for extension switching. In this case, the first divergence and convergence valve 21 is installed between a main change-over valve 8 and both change-over valves 14 and 15 in each cylinder extension side driving circuir 11, and the second and the third divergence and convergence valves 22 and 23 are installed between said valve 21 and the change-over valve 15. The bypass line 24 having a change-over valve 25 interposed is connected to the head side line to each cylinder.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16143380A JPS5786603A (en) | 1980-11-18 | 1980-11-18 | Hydraulic pressure controlling circuit for hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16143380A JPS5786603A (en) | 1980-11-18 | 1980-11-18 | Hydraulic pressure controlling circuit for hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5786603A true JPS5786603A (en) | 1982-05-29 |
Family
ID=15735012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16143380A Pending JPS5786603A (en) | 1980-11-18 | 1980-11-18 | Hydraulic pressure controlling circuit for hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5786603A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653378A (en) * | 2012-05-02 | 2012-09-05 | 华菱星马汽车（集团）股份有限公司 | Hydraulic device for synchronization action of two side hydraulic supporting legs of lorry-mounted crane |
| CN111878470A (en) * | 2020-07-30 | 2020-11-03 | 三一重工股份有限公司 | Boom hydraulic system and operation equipment |
-
1980
- 1980-11-18 JP JP16143380A patent/JPS5786603A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653378A (en) * | 2012-05-02 | 2012-09-05 | 华菱星马汽车（集团）股份有限公司 | Hydraulic device for synchronization action of two side hydraulic supporting legs of lorry-mounted crane |
| CN111878470A (en) * | 2020-07-30 | 2020-11-03 | 三一重工股份有限公司 | Boom hydraulic system and operation equipment |
| CN111878470B (en) * | 2020-07-30 | 2022-02-18 | 三一重工股份有限公司 | Boom hydraulic system and operation equipment |
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