JPH0465966U

JPH0465966U -

Info

Publication number: JPH0465966U
Application number: JP10633490U
Authority: JP
Priority date: 1990-10-08
Filing date: 1990-10-08
Publication date: 1992-06-09

Description

[Brief explanation of the drawing]

図面のうち第１図〜第３図は本考案の実施例に
係るもので、第１図はアキシヤルピストン型油圧
ポンプ・モータの断面図、第２図は第１図−
線断面図、第３図は押付力ＦＰと支持油圧力ＦＶ
とを説明する説明図、第４図・第５図は夫々従来
技術に係る第２図相当図である。４……シリンダバレル、５……弁板、５Ａ……
インナシールランド、５Ｂ……アウタシールラン
ド、８……ピストン、１７……高圧ポート、１８
……低圧ポート、２０……シリンダバレルのの中
心軸、２１……第１偏心点、２２……第２偏心点
、２４……インナシールランドの内縁、２５……
アウタシールランドの外縁。 Among the drawings, FIGS. 1 to 3 relate to an embodiment of the present invention, in which FIG. 1 is a cross-sectional view of an axial piston type hydraulic pump/motor, and FIG. 2 is a cross-sectional view of an axial piston type hydraulic pump/motor.
Line sectional view, Figure 3 shows pressing force FP and support hydraulic pressure FV
4 and 5 are diagrams corresponding to FIG. 2 according to the prior art, respectively. 4...Cylinder barrel, 5...Valve plate, 5A...
Inner seal land, 5B... Outer seal land, 8... Piston, 17... High pressure port, 18
... Low pressure port, 20 ... Center axis of cylinder barrel, 21 ... First eccentric point, 22 ... Second eccentric point, 24 ... Inner edge of inner seal land, 25 ...
The outer edge of the outer seal land.

Claims

[Claims for Utility Model Registration] A plurality of axial pistons, a cylinder barrel into which these pistons are inserted, and a valve plate that has a high pressure port exclusively for the high pressure side and a low pressure port exclusively for the low pressure side and slides into contact with the end surface of the cylinder barrel. In the axial piston type hydraulic pump/motor, the inner edge of the inner seal land inside the high-pressure and low-pressure ports of the valve plate has a first eccentric point that is eccentric toward the high-pressure port side with respect to the central axis of the cylinder barrel. The outer seal land outside the high-pressure and low-pressure ports of the valve plate is formed in a circular shape centered on a second eccentric point that is eccentric toward the low-pressure port side with respect to the central axis of the cylinder barrel. Axial piston type hydraulic pump/motor.