Nok Corporation

Shiho Sato

Takehiro Nakagawa

Hiroki Matsui

Kokichi Hamamoto

Hideaki Nagahamaya

A sealing device capable of preventing turnover of a dust lip and damage to a dust lip caused by insertion of a shaft. A bumper portion () made of a rubber-like elastic body and reducing an impact that the dust lip () receives from the shaft when the shaft is inserted into the sealing device () is provided on the side opposite to the sealed area (O) with respect to the dust lip (), and an inner diameter of a tip of the bumper portion () on an inner peripheral side is set to be larger than an outer diameter of a part of the shaft on which a main lip () and the dust lip () slide and to be smaller than an inner diameter of a part having the largest inner diameter in a portion connecting the main lip () and the dust lip ().

Sealing device

The invention provides a sealing device constructed by combination of a slinger and a lip member, the sealing device being capable of improving a sealing performance, particularly a sealing performance against external dusts. In order to achieve the object, in a sealing device having a slinger which is installed to one member among relatively rotating two members, a lip member which is installed to the other member, and structured such that the slinger integrally has a tubular portion which is fitted to the one member and a flange portion which extends in a diametrical direction, and the lip member having an end face lip which slidably comes into close contact with the flange portion, a bent portion protruding in an axial direction toward the lip member is provided in the flange portion, and a labyrinth structure having a minute gap is provided between the bent portion and the lip member.

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Fukushima, Japan

Shiho Sato