JPS648366A - Piston pump-motor - Google Patents
Piston pump-motorInfo
- Publication number
- JPS648366A JPS648366A JP62161996A JP16199687A JPS648366A JP S648366 A JPS648366 A JP S648366A JP 62161996 A JP62161996 A JP 62161996A JP 16199687 A JP16199687 A JP 16199687A JP S648366 A JPS648366 A JP S648366A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder barrel
- pressure
- ports
- oil groove
- motor
- 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
Abstract
PURPOSE:To effectively prevent the seizure on a sliding surface, in a valve plate having high-pressure and low-pressure ports, by providing an oil groove which opens in the rotational direction of a cylinder barrel and closes in the middle of the way, on the upper surface of each of slide pads which are provided on the outer circumference or the inner circumference of the high-pressure and low-pressure ports. CONSTITUTION:When a cylinder barrel 3 is turned via a main shaft 1, pistons 4 inside a plurality of cylinders 4a having been formed in the cylinder barrel 3 are slidably turned on a swash plate 6 via a shoe 5, thereby respective pistons 4 are reciprocated inside the cylinders 4a. Thus, the oil taken in through suction ports provided in a valve plate 7 is pressurized, and then is discharged through discharge ports. In such a hydraulic pump-motor as this, on the upper surface of each of slide pads 11 which have been provided on the outer circumferential side of suction and discharge ports 8a, 8b an oil groove 11a is formed. The oil groove 11a is so formed that it is opened against the rotational direction of the cylinder barrel 3, and is closed half-way by a land 11d.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62161996A JPS648366A (en) | 1987-06-29 | 1987-06-29 | Piston pump-motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62161996A JPS648366A (en) | 1987-06-29 | 1987-06-29 | Piston pump-motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS648366A true JPS648366A (en) | 1989-01-12 |
Family
ID=15746054
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62161996A Pending JPS648366A (en) | 1987-06-29 | 1987-06-29 | Piston pump-motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS648366A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003161268A (en) * | 2001-09-17 | 2003-06-06 | Ebara Corp | Axial piston type pump and motor |
CN102713285A (en) * | 2009-10-27 | 2012-10-03 | 日立建机株式会社 | Axial piston hydraulic rotating machine |
CN104019024A (en) * | 2014-06-10 | 2014-09-03 | 柳州柳工液压件有限公司 | Leakproof dynamic pressure type valve plate |
WO2022054808A1 (en) * | 2020-09-14 | 2022-03-17 | 株式会社小松製作所 | Valve plate, cylinder block, and hydraulic motor |
-
1987
- 1987-06-29 JP JP62161996A patent/JPS648366A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003161268A (en) * | 2001-09-17 | 2003-06-06 | Ebara Corp | Axial piston type pump and motor |
CN102713285A (en) * | 2009-10-27 | 2012-10-03 | 日立建机株式会社 | Axial piston hydraulic rotating machine |
CN104019024A (en) * | 2014-06-10 | 2014-09-03 | 柳州柳工液压件有限公司 | Leakproof dynamic pressure type valve plate |
WO2022054808A1 (en) * | 2020-09-14 | 2022-03-17 | 株式会社小松製作所 | Valve plate, cylinder block, and hydraulic motor |
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