JPH0421772U

JPH0421772U -

Info

Publication number: JPH0421772U
Application number: JP6348790U
Authority: JP
Priority date: 1990-06-15
Filing date: 1990-06-15
Publication date: 1992-02-24
Anticipated expiration: 2005-06-15
Also published as: JPH0752384Y2

Description

[Brief explanation of drawings]

第１図はこの考案の第１実施例を示す断面図、
第２図は第１図の−矢視断面図、第３図はリ
テーナプレートの延長部近傍の断面図、第４図は
この考案の第２実施例を示す要部断面図、第５図
はピストンの他の実施例を示す断面図である。４……回転軸、８……斜板、９……傾斜面、１
８……ピストン、２１……ピストン・シリンダ組
立体、３１，５１，６３……リテーナプレート、
３２，５２……基部、３８，５３……延長部、３
９，５４……第１凹部、４５，５６……第２凹部
。 FIG. 1 is a sectional view showing the first embodiment of this invention;
Fig. 2 is a sectional view taken along the - arrow in Fig. 1, Fig. 3 is a sectional view of the vicinity of the extended portion of the retainer plate, Fig. 4 is a sectional view of the main part showing the second embodiment of this invention, and Fig. 5 is It is a sectional view showing other examples of a piston. 4... Rotating shaft, 8... Swash plate, 9... Inclined surface, 1
8... Piston, 21... Piston/cylinder assembly, 31, 51, 63... Retainer plate,
32, 52... base, 38, 53... extension part, 3
9, 54...first recess, 45, 56...second recess.

Claims

[Claims for Utility Model Registration] (1) In a swash plate type fluid pump/motor comprising a swash plate having an inclined surface inclined with respect to the rotation axis and a piston/cylinder assembly, the inclined surface of the swash plate and A substantially donut-shaped base that extends in parallel and locks the front end of each piston, an extension that extends from the radially outer end of the base toward the inclined surface, and a base that is provided on the inner circumferential surface of the extension. A retainer plate made of a thin material is provided, and a second recess opposite to the first recess is formed on the outer peripheral surface of the swash plate, and the extension part is elastically deformed so as to expand in diameter. The swash plate type is characterized in that a plurality of balls are interposed between the first recess and the second recess in the extended state, and the piston is pressed against the inclined surface by the elastic restoring force of the extension. Fluid pump motor. (2) In a swash plate type fluid pump motor comprising a swash plate having an inclined surface inclined with respect to the rotation axis and a piston/cylinder assembly, a front end of each piston extends parallel to the inclined surface of the swash plate. comprising a substantially donut-shaped base portion in which is locked, an extension portion extending from the radially inner end of the base portion toward the inclined surface side, and a first recess provided in the inner circumferential surface of the extension portion, A retainer plate made of a thin material is provided, a second recess is formed on the outer circumferential surface of the swash plate, and the extension part is elastically deformed so as to reduce the diameter of the second recess. A swash plate type fluid pump/motor, characterized in that a plurality of balls are interposed between the second recess and the piston to be pressed against the inclined surface by the elastic restoring force of the extension.