JPS5586907A - Three-pump hydraulic circuit for construction machinery or the like - Google Patents
Three-pump hydraulic circuit for construction machinery or the likeInfo
- Publication number
- JPS5586907A JPS5586907A JP16234778A JP16234778A JPS5586907A JP S5586907 A JPS5586907 A JP S5586907A JP 16234778 A JP16234778 A JP 16234778A JP 16234778 A JP16234778 A JP 16234778A JP S5586907 A JPS5586907 A JP S5586907A
- Authority
- JP
- Japan
- Prior art keywords
- pumps
- directional control
- engine
- control valve
- pump
- 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
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To select an optimal pump depending on necessity and efficiently use the output of an engine, by providing two hydraulic pumps of equal small capacity and a pump whose capacity is double that of the former pumps.
CONSTITUTION: Two hydraulic pumps 2a', 2b' of equal small capacity and a hydraulic pump 2c', whose capacity is double that of the former pumps, are coupled to the output shaft of the engine 1 of construction equipment. The discharge ports of the pumps are connected to the inlet ports 8aW8c of a two-position six-port directional control valve 8. Two outlet ports 8d, 8e of the directional control valve 8 are connected through ducts 9a, 9b to tandem directional control valves 5a, 5b, which control oil supply to actuators 6 (6aW6f). Optional switching can be effected by the directional control valve 8 to utilize the three pumps for work or running or utilize only two pumps 2a', 2b'. This results in effectively using the output of the engine.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16234778A JPS5586907A (en) | 1978-12-22 | 1978-12-22 | Three-pump hydraulic circuit for construction machinery or the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16234778A JPS5586907A (en) | 1978-12-22 | 1978-12-22 | Three-pump hydraulic circuit for construction machinery or the like |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5586907A true JPS5586907A (en) | 1980-07-01 |
Family
ID=15752822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16234778A Pending JPS5586907A (en) | 1978-12-22 | 1978-12-22 | Three-pump hydraulic circuit for construction machinery or the like |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5586907A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6180855U (en) * | 1984-10-31 | 1986-05-29 | ||
JPS61188653U (en) * | 1985-05-18 | 1986-11-25 | ||
JPS6386170U (en) * | 1986-11-19 | 1988-06-06 |
-
1978
- 1978-12-22 JP JP16234778A patent/JPS5586907A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6180855U (en) * | 1984-10-31 | 1986-05-29 | ||
JPS61188653U (en) * | 1985-05-18 | 1986-11-25 | ||
JPH0519393Y2 (en) * | 1985-05-18 | 1993-05-21 | ||
JPS6386170U (en) * | 1986-11-19 | 1988-06-06 |
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