JPH0482377U

JPH0482377U -

Info

Publication number: JPH0482377U
Application number: JP12522390U
Authority: JP
Priority date: 1990-11-29
Filing date: 1990-11-29
Publication date: 1992-07-17
Anticipated expiration: 2005-11-29
Also published as: KR920010152A; KR100236732B1; JP2502901Y2

Description

[Brief explanation of drawings]

第１図は本考案に係る斜板式ピストンポンプ・
モータの全体断面図、第２図は本考案に係る他の
実施例を示す斜板式ピストンポンプ・モータの全
体断面図、第３図は第１図のＡ−Ａ断面図であり
、第４図は第１図のＢ−Ｂ断面図である。１０……シヤフト、１２……シリンダブロツク
、１４……シリンダ穴、１６……ピストン、１８
……カバー、２０……バルブプレート、２２……
流通孔、２４ａ，２４ｂ……軸受、２６……シユ
ー、２８……斜板、３０ａ，３０ｂ……吐出ポー
ト、３２……ブツシユ、３４……供給ポート、３
６……まゆ形ポート、４０，４６……段付穴、４
２，４８……ピストン、４４，５０……小径孔…
…。 Figure 1 shows the swash plate type piston pump according to the present invention.
2 is an overall sectional view of a swash plate type piston pump motor showing another embodiment of the present invention; FIG. 3 is an AA sectional view of FIG. 1; FIG. 4 is an overall sectional view of the motor; is a sectional view taken along line B-B in FIG. 1; 10...Shaft, 12...Cylinder block, 14...Cylinder hole, 16...Piston, 18
...Cover, 20...Valve plate, 22...
Distribution hole, 24a, 24b... bearing, 26... shoe, 28... swash plate, 30a, 30b... discharge port, 32... bush, 34... supply port, 3
6... Cocoon-shaped port, 40, 46... Stepped hole, 4
2,48...Piston, 44,50...Small diameter hole...
….

Claims

[Claims for Utility Model Registration] (1) A cylinder block and a shaft are integrally constructed and rotatably supported by bearings, and pistons are slid into each of a plurality of cylinder holes formed in the cylinder block. In addition to being movably inserted, the end face of this cylinder block is positioned by a cover, and is slidably and fluid-tightly pressed against a valve plate that is movable in the axial direction of the cylinder block, and furthermore, the back surface of the valve plate A swash plate type piston pump/motor is provided with a bush that communicates with a port on the suction side or the discharge side, and the end face of the valve plate is pressed against the end face of the cylinder block by hydraulic pressure acting on the bush. A plurality of cocoon-shaped ports that switch the supply of low-pressure oil, a small-diameter hole that introduces pressure oil from between the cocoon-shaped ports, and a surface that communicates with the small-diameter hole from the surface opposite to the surface that slides on the end surface of the cylinder block. A swash plate type piston, comprising: a stepped hole; and a piston fitted into the stepped hole so as to be slidable in the axial direction, and the valve plate is pressed against the end face of the cylinder block by pressure. pump motor. (2) The valve plate is composed of a plurality of cocoon-shaped ports and a small-diameter hole that introduces the pressure oil in the cylinder hole between the cocoon-shaped ports, and an end face of the cylinder block and an end face of the cylinder block are provided on the valve plate side of the cover. A stepped hole is formed that communicates with the small diameter hole from the sliding surface side, and a hollow piston is inserted into the stepped hole so as to be able to slide in the axial direction, and the valve plate is connected to the end surface of the cylinder block by hydraulic pressure. The swash plate type piston pump motor according to claim 1, wherein the swash plate type piston pump motor is pressed against the motor.