JPH0259363U

JPH0259363U -

Info

Publication number: JPH0259363U
Application number: JP1988138453U
Authority: JP
Priority date: 1988-10-24
Filing date: 1988-10-24
Publication date: 1990-04-27

Description

[Brief explanation of drawings]

第１図は本考案の一実施例に係る油密シールの
要部を示す回動軸との関係で示す縦断面図、第２
図は従来の油密シールを示す第１図相当図、第３
図は油密シールが用いられている機器の一例とし
て動力舵取装置を示す縦断面図である。２…ハウジング、５…出力軸（回動軸）、６…
蓋状ハウジング（ハウジング）、８ａ…内リツプ
部、８ｂ…外リツプ部、８ｃ…基部、９…バツク
アツプリング、９ａ…内面、９ｂ…環状溝（凹部
）、９ｃ…摺接面（凸部）、１０…油密シール。 Fig. 1 is a vertical cross-sectional view showing the main parts of an oil-tight seal according to an embodiment of the present invention in relation to the rotation axis;
The figures are equivalent to Figure 1 and 3, which show conventional oil-tight seals.
The figure is a longitudinal sectional view showing a power steering device as an example of equipment in which an oil-tight seal is used. 2...Housing, 5...Output shaft (rotation shaft), 6...
Lid-shaped housing (housing), 8a...inner lip part, 8b...outer lip part, 8c...base, 9...backup spring, 9a...inner surface, 9b...annular groove (recess), 9c...sliding surface (protrusion) , 10...Oil-tight seal.

Claims

[Scope of utility model registration request]

It has curved annular inner and outer lips, and a back-up spring made of a low-friction material fitted to the inner periphery of the base at the intersection of these inner and outer lips,
In the oil-tight seal, which is press-fitted between the housing and the rotating shaft supported through the housing, and which seals between the housing and the rotating shaft by the mutually outward returning forces of the inner and outer lip portions, the back-up An oil-tight seal characterized in that an uneven portion is provided on the inner surface of the ring that comes into sliding contact with the rotation shaft.