Nok Corporation

Akihiro Komyo

Takehiro Nakagawa

Hiroki Matsui

Toru Nakashima

Shinya Omoto

Yusuke Kamiya

Shota Toma

Shinichi Ishibashi

Tomoki Nishide

A seal device prevents sealing fluid on the inner-machine side from leaking to the outer-machine side between a housing and a rotating shaft inserted into a shaft hole on the housing. The seal lip is attached to the inner periphery of the shaft hole to slidingly contact the seal flange attached to the outer periphery of the rotating shaft. The thread groove, which exerts a fluid pumping action when the shaft is rotating, is provided on the seal flange so as to intersect with a lip end of the seal lip. The thread groove is formed so as to have a relatively small cross-sectional area in a sliding area in the seal flange that the seal lip comes in sliding contact with and have a relatively large cross-sectional area in an inner peripheral side area located on an inner peripheral side more than the sliding area.

Seal device

To provide a sealing structure with an annular pocket and a sealing apparatus that can efficiently reduce exposure of a seal lip of the sealing apparatus to foreign matter entering from the outside. In a sealing structure () with a torsional damper and an oil seal, a hub pocket () has an outer circumferential surface () in an annular shape centered about an axis x that extends along the axis x and is formed in an outer shell part () that is opposed to a shaft member on an outer periphery side, a dust discharging hole () or a dust discharging groove () connected to the hub pocket () is formed in the outer shell part (), and the dust discharging hole () or the dust discharging groove () is inclined at a predetermined angle in such a manner that a discharge opening (out) is directed in an opposite direction to a rotational direction of the shaft member.

Sealing structure with annular pocket and sealing apparatus

A sealing structure with a torsional damper and an oil seal includes a damper pulley and an oil seal. The damper pulley includes, in a disk part of a hub on a front cover side, an annular projection that protrudes between the window and the boss part. The oil seal includes a side lip and a flange. The side lip extends to the inside of an annular groove of the damper pulley. The flange is opposed to the projection of the damper pulley to cover the projection so that a gap is formed between the flange and the projection.

Sealing structure with torsional damper and oil seal

Growing community of inventors

Fukushima, Japan

Akihiro Komyo