JPH0234385U

JPH0234385U -

Info

Publication number: JPH0234385U
Application number: JP11451888U
Authority: JP
Priority date: 1988-08-31
Filing date: 1988-08-31
Publication date: 1990-03-05

Description

[Brief explanation of the drawing]

第１図は本考案に従つた動力舵取装置の一実施
例を示す縦断面図、第２図は第１図に示す一実施
例の横断面図、第３図のａ〜ｄは本考案の説明図
である。１０……動力舵取装置、１１……ハウジング、
１２……入力軸、１３……パワーピストン、１４
……出力軸、１５……一方作動液圧室、１６……
他方作動液圧室、１７……バルブレバー、１７ａ
……係合部、１８……バルブスプール、１８ａ…
…環状溝、Ｐ……液圧ポンプ、Ｒ……リザーバ。 FIG. 1 is a longitudinal cross-sectional view showing an embodiment of a power steering device according to the present invention, FIG. 2 is a cross-sectional view of the embodiment shown in FIG. 1, and figures a to d of FIG. FIG. 10... Power steering device, 11... Housing,
12...Input shaft, 13...Power piston, 14
...Output shaft, 15...One side working hydraulic pressure chamber, 16...
On the other hand, a working hydraulic pressure chamber, 17... Valve lever, 17a
...Engaging portion, 18...Valve spool, 18a...
...Annular groove, P...hydraulic pump, R...reservoir.

Claims

[Scope of utility model registration request]

A reciprocating hydraulic cylinder device comprising a housing and a power piston fluid-tightly and slidably fitted into an inner hole formed in the housing to operate a steering link mechanism of a vehicle; a hydraulic pump for sending hydraulic fluid in a reservoir to a pressure-actuated cylinder device, housed within the power piston so as to be relatively rotatable and move integrally with the power piston according to rotation of the input shaft; a valve lever including an engaging portion having an engaging surface extending in the sliding direction of the power piston at an end thereof and protruding outward from the power piston; The valve lever is slidably accommodated in a hole formed in the direction, and an annular groove formed on the outer periphery of the valve lever is slidably engaged with an engaging portion of the valve lever, so that the valve lever is slidably moved back and forth by rotation of the input shaft. and a valve spool for causing hydraulic fluid from the hydraulic pump to flow into one of the two hydraulic chambers of the reciprocating hydraulic cylinder in response to unidirectional rotation of the input shaft. At the same time, the hydraulic fluid in the other hydraulic pressure chamber is caused to flow out into the reservoir, and in response to the rotation of the input shaft in the other direction, the hydraulic fluid from the hydraulic pump is caused to flow into the other hydraulic pressure chamber. A hydraulic power steering device comprising a control valve device for causing hydraulic fluid in a pressure chamber to flow out into the reservoir, further comprising a neutral position regulating means for regulating a neutral position of the valve lever, and an engaging portion of the valve lever. When the input shaft is in neutral, the engaging surface of the valve spool is connected to the annular surface of the annular groove of the valve spool on the side that slides in the annular groove as the power piston moves during rotation of the input shaft. A hydraulic power steering device, characterized in that the engaging portion is inclined so as to be positioned in a direction opposite to the sliding direction of the valve spool when the input shaft rotates relative to the annular groove.