JPS5757903A - Fluid circuit - Google Patents
Fluid circuitInfo
- Publication number
- JPS5757903A JPS5757903A JP55131895A JP13189580A JPS5757903A JP S5757903 A JPS5757903 A JP S5757903A JP 55131895 A JP55131895 A JP 55131895A JP 13189580 A JP13189580 A JP 13189580A JP S5757903 A JPS5757903 A JP S5757903A
- Authority
- JP
- Japan
- Prior art keywords
- flow direction
- load pressure
- actuators
- pressure
- control valves
- 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
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To operate a machine in its optimum state used in a cargo-handling machine of oil hydraulic shovel and crane or the like, by correctly performing speed control for a plurality of actuators without being affected by other load pressure.
CONSTITUTION: A spring chamber of a pressure reducing pressure compensating valve 36 and load pressure sensing port of the second flow direction control valves 38a, 38b are connected to a spring chamber of a power match valve 81a through a shuttle valve 52. In this way, when load pressure of the second flow direction contr ol valves 37a, 37b is higher than load pressure of the second flow direction control valves 38a, 38b, a large amount of fluid to the second actuators 25, 26 and small amount of fluid to the first actuators 28, 30 are supplied, while in a reverse case, the first and second flow direction control valves 37a, 37b, 38, 38b are pressure compensated altogether, thus workability and safety can be improved.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55131895A JPS5757903A (en) | 1980-09-22 | 1980-09-22 | Fluid circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55131895A JPS5757903A (en) | 1980-09-22 | 1980-09-22 | Fluid circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5757903A true JPS5757903A (en) | 1982-04-07 |
JPS642801B2 JPS642801B2 (en) | 1989-01-18 |
Family
ID=15068659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55131895A Granted JPS5757903A (en) | 1980-09-22 | 1980-09-22 | Fluid circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5757903A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991013217A1 (en) * | 1990-02-28 | 1991-09-05 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system in construction machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5257478A (en) * | 1975-11-05 | 1977-05-11 | Daikin Ind Ltd | Fluid equipment |
-
1980
- 1980-09-22 JP JP55131895A patent/JPS5757903A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5257478A (en) * | 1975-11-05 | 1977-05-11 | Daikin Ind Ltd | Fluid equipment |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991013217A1 (en) * | 1990-02-28 | 1991-09-05 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system in construction machine |
Also Published As
Publication number | Publication date |
---|---|
JPS642801B2 (en) | 1989-01-18 |
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