JPS5786654A - Closed hydraulic circuit - Google Patents
Closed hydraulic circuitInfo
- Publication number
- JPS5786654A JPS5786654A JP16075780A JP16075780A JPS5786654A JP S5786654 A JPS5786654 A JP S5786654A JP 16075780 A JP16075780 A JP 16075780A JP 16075780 A JP16075780 A JP 16075780A JP S5786654 A JPS5786654 A JP S5786654A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pilot
- chambers
- passages
- hydraulic 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.)
- Granted
Links
Abstract
PURPOSE: To improve the neutral speed reduction performance of a hydraulic shovel or the like in its turning or the like and improve the holding performance of the shovel or the like on a slope, by always detecting pilot pressure for the operation of a hydraulic pump to judge whether or not a speed reduction circuit should be put in operation.
CONSTITUTION: Chambers A, B on the piston 3A of a controller 3 for regulating the hydraulic pump 2a of a closed hydraulic circuit are connected to a pilot oil pressure source through a pilot valve 6. Chambers C, D on pistons 3B, 3C are connected to the pilot ports of a changeover valve 10 through passages (c)W (f) at both the sides of the hydraulic pump 2a and through a changeover valve 8 and passages (g), (h). Passages (k), (l) for connecting the pilot valve 6 to the chambers A, B of the controller 3 are coupled to each other through a shuttle valve 5. The shuttle valve 5 is connected to the port of the changeover valve 8. Piston chambers E, F on pistons 4a, 4b are connected to an oil pressure source through the changeover valve 10.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16075780A JPS5786654A (en) | 1980-11-17 | 1980-11-17 | Closed hydraulic circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16075780A JPS5786654A (en) | 1980-11-17 | 1980-11-17 | Closed hydraulic circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5786654A true JPS5786654A (en) | 1982-05-29 |
JPS6115307B2 JPS6115307B2 (en) | 1986-04-23 |
Family
ID=15721802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16075780A Granted JPS5786654A (en) | 1980-11-17 | 1980-11-17 | Closed hydraulic circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5786654A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06307540A (en) * | 1993-04-22 | 1994-11-01 | Kayaba Ind Co Ltd | Pump control device for hydrostatic power transmitting mechanism |
-
1980
- 1980-11-17 JP JP16075780A patent/JPS5786654A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06307540A (en) * | 1993-04-22 | 1994-11-01 | Kayaba Ind Co Ltd | Pump control device for hydrostatic power transmitting mechanism |
Also Published As
Publication number | Publication date |
---|---|
JPS6115307B2 (en) | 1986-04-23 |
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