JPH01102570U

JPH01102570U -

Info

Publication number: JPH01102570U
Application number: JP1987198921U
Authority: JP
Priority date: 1987-12-28
Filing date: 1987-12-28
Publication date: 1989-07-11

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例である補助リツプ付
オイルシールの断面図、第２図及び第３図はこの
実施例を軸に装着する途中の状態を示す一部断面
図、第４図はこのこの実施例を軸に装着した状態
を示す一部断面図、第５図は空間が負圧になつた
場合の状態を説明する一部断面図、第６図は従来
のオイルシールの断面図であつて、オイルシール
を軸に装着する途中の状態を示すもの、第７図は
軸に装着した状態における従来のオイルシールの
断面図である。１……軸の周面、２……シール本体、３……金
属製補強体、４……リツプ部、５……保持ばね、
６……補助リツプ、７……オイル作用空間、８…
…軸の先端面取部、９……ハウジング部材、１０
……自由端縁、１１……空間、１２……大なる部
分。 Fig. 1 is a sectional view of an oil seal with an auxiliary lip which is an embodiment of the present invention, Figs. 2 and 3 are partial sectional views showing this embodiment in the middle of being installed on a shaft, and Fig. 4. is a partial cross-sectional view showing this embodiment mounted on a shaft, Figure 5 is a partial cross-sectional view illustrating the state when the space becomes negative pressure, and Figure 6 is a cross-sectional view of a conventional oil seal. FIG. 7 is a sectional view of a conventional oil seal in a state where the oil seal is mounted on a shaft. DESCRIPTION OF SYMBOLS 1... Circumferential surface of shaft, 2... Seal body, 3... Metal reinforcement, 4... Lip portion, 5... Holding spring,
6... Auxiliary lip, 7... Oil action space, 8...
... Chamfered end of shaft, 9 ... Housing member, 10
...Free edge, 11...Space, 12...Large part.

Claims

[Scope of utility model registration request]

An oil seal comprising a seal body made of an elastic material and an annular retaining spring, the seal body having an annular lip portion that is pressed against the circumferential surface of a shaft that moves by the retaining spring. The lip part has an annular auxiliary lip extending from the oil space side toward the inside of the oil space at an angle, and the shape and rigidity of the auxiliary lip are similar to that of the oil seal and the chamfered end part. When installing the oil seal around the shaft by relatively moving the shaft having a At the time of mounting, the free edge of the auxiliary lip comes into contact with the shaft and is pressed, thereby inverting the lip part and thereby causing the auxiliary lip to slide on the surface. An oil seal with an auxiliary lip, characterized in that the retaining spring is prevented from falling off.