JPH03124986U

JPH03124986U -

Info

Publication number: JPH03124986U
Application number: JP3491490U
Authority: JP
Priority date: 1990-03-30
Filing date: 1990-03-30
Publication date: 1991-12-18

Description

[Brief explanation of drawings]

第１図は本考案に従つた液圧式動力舵取装置の
一実施例を示す縦断面図、第２図は第１図に示す
実施例の横断面図である。１０……液圧式動力舵取装置、１１……ハウジ
ング、１１ａ……内孔、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、１７ｂ……
凹部、１８……バルブスプール、４０……ピン、
４０ａ……球状部、５０……サイドカバー、５０
ａ……孔、Ｐ……液圧ポンプ、Ｒ……リザーバ。 FIG. 1 is a longitudinal cross-sectional view showing an embodiment of a hydraulic power steering device according to the present invention, and FIG. 2 is a cross-sectional view of the embodiment shown in FIG. 1. DESCRIPTION OF SYMBOLS 10... Hydraulic power steering device, 11... Housing, 11a... Inner hole, 12... Input shaft, 13...
...Power piston, 14... Output shaft, 15... One working hydraulic pressure chamber, 16... The other working hydraulic pressure chamber, 17...
...Valve lever, 17a...Engagement part, 17b...
Recess, 18...valve spool, 40...pin,
40a...Spherical part, 50...Side cover, 50
a...hole, P...hydraulic pump, R...reservoir.

Claims

[Scope of utility model registration request]

The housing is slidably fitted in a liquid-tight manner into an inner hole formed in the housing, and has one end rotatably supported by the housing and the other end rotatably supported by a side cover fixed to the housing. A reciprocating hydraulically actuated cylinder device comprising a power piston that engages with an output shaft to move the steering linkage of the vehicle, and a hydraulic pressure for sending hydraulic fluid in a reservoir to the reciprocating hydraulically actuated cylinder device a pump, which is housed in the power piston so as to be relatively rotatable in accordance with the rotation of the input shaft and to move integrally with the power piston, and an engagement extending in the sliding direction of the power piston at an end thereof; a valve lever including an engaging portion having a surface and protruding outward from the power piston; a valve spool that is slidably engaged with an engaging portion and slidably reciprocated by the rotation of the input shaft; The hydraulic fluid from the hydraulic pump is caused to flow into one of the hydraulic pressure chambers, and the hydraulic fluid from the other hydraulic pressure chamber is caused to flow into the reservoir, and in response to rotation of the input shaft in the other direction. In the hydraulic power steering device, the hydraulic power steering device includes a control valve device that allows hydraulic fluid from the hydraulic pump to flow into the other hydraulic pressure chamber and causes hydraulic fluid in the one hydraulic pressure chamber to flow out to the reservoir. A recessed portion having the engaging surface on the inner periphery is formed at the tip of the engaging portion of the valve lever, and the engaging portion is accommodated within the outer diameter of the power piston to form the power piston into a straight cylinder shape. The valve lever and the valve spool are connected by a pin having one end slidably engaged with the recess and the other end being immovable relative to the valve spool, and further the valve spool is slidable. 1. A hydraulic power steering device, characterized in that the hole accommodated in the side cover is formed in the side cover.