JPS6284581U

JPS6284581U -

Info

Publication number: JPS6284581U
Application number: JP17693685U
Authority: JP
Priority date: 1985-11-19
Filing date: 1985-11-19
Publication date: 1987-05-29

Description

[Brief explanation of drawings]

第１図は本考案に係わる自動車のパワーステア
リング装置の一実施例を示す縦断側面図、第２図
はバルブハウジングの上端部と入力軸との間に介
装されるオイルシールの一例を示す拡大縦断側面
図、第３図はバルブハウジングの下端部とピニオ
ンハウジングとの間に介装されるオイルシールの
一例を示す拡大縦断側面図である。１……オイルポンプ、２……油路切換弁、３…
…パワーシリンダ、４……オイルタンク、５……
反力ピストン、７ａ……高圧油路、８ａ，８ｂ…
…低圧油路、２０ａ……バルブハウジング、２０
ｂ……ピニオンハウジング、２１……入力軸、２
２……トーシヨンバー、２３……シリンダブロツ
ク、２３ａ……ピニオン、２４ａ……ピニオン２
３ａにラツクを介して噛合した出力軸、３１，３
５……オイルシール、３５ａ_１……オイルシール
背面、３５ｂ_１……オイルシール外周面、３５ｂ
_２……環状シール部。 Fig. 1 is a vertical sectional side view showing an embodiment of an automobile power steering device according to the present invention, and Fig. 2 is an enlarged view showing an example of an oil seal interposed between the upper end of the valve housing and the input shaft. FIG. 3 is an enlarged vertical side view showing an example of an oil seal interposed between the lower end of the valve housing and the pinion housing. 1...Oil pump, 2...Oil passage switching valve, 3...
...Power cylinder, 4...Oil tank, 5...
Reaction piston, 7a... High pressure oil path, 8a, 8b...
...Low pressure oil path, 20a...Valve housing, 20
b...Pinion housing, 21...Input shaft, 2
2... Torsion bar, 23... Cylinder block, 23a... Pinion, 24a... Pinion 2
Output shaft meshed with 3a through a rack, 31, 3
5...Oil seal, 35a ₁ ...Oil seal rear surface, 35b ₁ ...Oil seal outer peripheral surface, 35b
₂ ...Annular seal portion.

Claims

[Scope of utility model registration request]

an input shaft connected to the steering wheel;
A torsion bar that transmits the rotation of the input shaft to the cylinder block, an output shaft meshed with a pinion provided on the cylinder block via a rack, a power cylinder connected to the output shaft, and a link between the input shaft and the output shaft. an oil passage switching valve that switches an oil passage to the power cylinder according to the rotation angle difference; a high-pressure oil passage that supplies hydraulic oil discharged from the oil pump to the power cylinder via the oil passage switching valve; A regulating force is applied between the low-pressure oil passage that returns hydraulic oil from the power cylinder to the oil tank via the oil passage switching valve, and the input shaft and output shaft to limit the rotation angle difference between the respective shafts. The reaction piston on the cylinder block side, the pinion housing surrounding the pinion of the cylinder block, the valve housing surrounding the other parts, the outer peripheral surface of the oil seal that contacts the inner peripheral surface of the valve housing, and the pinion In a power steering device comprising an annular oil seal having a rear surface of the oil seal in contact with an inner circumferential surface of a housing, an annular oil seal protrudes diagonally outward at a corner between the outer circumferential surface of the oil seal and the rear surface of the oil seal. A power steering device characterized by forming an annular seal portion.