JPS648366A - Piston pump-motor - Google Patents

Piston pump-motor

Info

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
Application number
JP62161996A
Other languages
Japanese (ja)
Inventor
Kunio Sagi
Koichiro Nomura
Takayoshi Hamada
Katsutoshi Ohara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP62161996A priority Critical patent/JPS648366A/en
Publication of JPS648366A publication Critical patent/JPS648366A/en
Pending legal-status Critical Current

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.
JP62161996A 1987-06-29 1987-06-29 Piston pump-motor Pending JPS648366A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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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