JPH0482376U

JPH0482376U -

Info

Publication number: JPH0482376U
Application number: JP12522290U
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: JP2502900Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係る多重ピストンポンプ・モ
ータの全体断面図、第２図は第１図のＡ−Ａ断面
図、第３図は第２図のＢ−Ｏ−Ｃ断面図、第４図
は第１図のＥ−Ｅ断面図、第５図は第２図のＢ−
Ｏ−Ｄ断面図であり、第６図は第２図のＣ−Ｏ−
Ｄ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……ポートプレート、２２ａ，
２２ｂ……吐出ポート、２３ａ，２３ｄ……流通
孔、２３ｂ，２３ｃ……溝、２４……吸込みポー
ト、２６ａ，２６ｂ，２６ｃ，２８ａ，２８ｂ，
２８ｃ……流通路、３０ａ，３０ｂ……段付穴、
３２ａ，３２ｂ……中空穴、３４ａ，３４ｂ……
段付ブツシユ、３６ａ，３６ｂ……吐出ポート、
４０ａ，４０ｂ……油室、４２ａ，４２ｂ……弾
性体。 Fig. 1 is an overall cross-sectional view of a multiple piston pump/motor according to the present invention, Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1, Fig. 3 is a cross-sectional view taken along B-OC in Fig. 2, and Fig. 4 is a cross-sectional view taken along the line A-A in Fig. 1. The figure is a sectional view taken along line E-E in Figure 1, and Figure 5 is a cross-sectional view taken along line B-- in Figure 2.
It is an O-D sectional view, and FIG. 6 is a C-O-
It is a D sectional view. 10...Shaft, 12...Cylinder block, 14...Cylinder hole, 16...Piston, 18
...Cover, 20...Port plate, 22a,
22b...Discharge port, 23a, 23d...Flow hole, 23b, 23c...Groove, 24...Suction port, 26a, 26b, 26c, 28a, 28b,
28c...Flow path, 30a, 30b...Stepped hole,
32a, 32b...Hollow hole, 34a, 34b...
Stepped bush, 36a, 36b...discharge port,
40a, 40b...oil chamber, 42a, 42b...elastic body.

Claims

[Claims for Utility Model Registration] (1) A piston is fitted into each of a plurality of cylinder holes formed in a cylinder block so as to be able to slide in the axial direction, and the end face of this cylinder block is positioned by a cover, The cylinder block is slidably and liquid-tightly pressed against a movable port plate in the axial direction, and a plurality of concentric circles with different radii are formed on the end face of the cylinder block from each cylinder hole toward the port plate. A plurality of ports having different radii and separated from each other are opened on a concentric circle of the port plate in order to communicate with the plurality of flow paths, and are independent from the plurality of ports. In a multiple piston pump/motor configured to be able to discharge fluid, the cylinder block and the shaft are integrally configured, and one of the plurality of ports formed on the port plate is provided on the port plate side of the cover. A plurality of stepped holes are formed corresponding to the stepped holes, stepped bushes are inserted into these stepped holes so as to be slidable in the axial direction, and each stepped portion of the bush is connected to a corresponding port and other ports. A multi-piston pump/motor, characterized in that it is configured to introduce pressure oil respectively. (2) The bush has a hollow interior so as to correspond to one of the plurality of ports formed in the port plate, and the hollow part of the bush is formed on the discharge side (pump pump) formed in the cover. (in the case of a motor) or a port on the suction side (in the case of a motor), and each stepped part of the bushing is provided with a corresponding port on the discharge side or suction side and other positions with different radii. 2. The multi-piston pump/motor according to claim 1, wherein pressure is introduced into each port, and the end surface of the port plate is pressed against the end surface of the bush in a fluid-tight manner by the action of the pressure.