JPH0234384U

JPH0234384U -

Info

Publication number: JPH0234384U
Application number: JP11451788U
Authority: JP
Priority date: 1988-08-31
Filing date: 1988-08-31
Publication date: 1990-03-05

Description

[Brief explanation of drawings]

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図は本考案におけるバルブレ
バーの係合部を示す図である。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 sectional view showing an embodiment of the power steering device according to the present invention, FIG. 2 is a cross-sectional view of the embodiment shown in FIG. 1, and FIG. It is a figure showing an engaging part. 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.

補正昭６３．１２．２２図面の簡単な説明を次のように補正する。明細書の第１３頁第４行目〜同頁第５行目の「
、第３図は〜示す図」を削除する。Amendment December 22, 1983 The brief description of the drawing is amended as follows. "In the 4th line of page 13 of the specification to the 5th line of the same page"
, "Figure 3 shows ~" is deleted.

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. In a hydraulic power steering device comprising a control valve device for causing hydraulic fluid in a pressure chamber to flow out into the reservoir, the engaging surface of the engaging portion of the valve lever has a width at both ends in the sliding direction of the power piston. 1. A hydraulic power steering device, characterized in that the input shaft has a shape that decreases from the central portion toward the central portion, and a gap is provided between the input shaft and the annular groove of the spool valve when the input shaft is in a neutral state.