Ntn Corporation

Eiji Funahashi

Takayuki Norimatsu

Hisashi Ohtsuki

Motoharu Niki

Koji Kametaka

Katsumi Sugiyama

Koji Sahashi

Kenro Adachi

A wheel bearing includes a sealing devicepositioned between inner and outer membersand. This sealing deviceincludes an elastic member, which eventually forms an encoder grid and is provided on a first annular sealing plate. A second annular sealing plateis provided with sealing lipsto. An engagementbetween a cylindrical wallof the first annular sealing plateand the inner memberis provided with an elastic membermade of a material dissimilar to that for the elastic material. This elastic membermay be a rubber coated layer, resin paint layer, a thin film of adhesive material or a ring-shaped rubber member. Thereby, any possible ingress of water across an engagement surface of the annular sealing plate is prevented, accompanied by increase of the lifetime of the bearing, with no problem associated with separation and displacement of the annular sealing plates. The magnetic flux density can also be easily secured.

Wheel bearing and sealing device therefor

A wheel bearing includes a sealing device positioned between inner and outer members and . This sealing device includes an elastic member , which eventually forms an encoder grid and is provided on a first annular sealing plate . A second annular sealing plate is provided with sealing lips to . An engagement between a cylindrical wall of the first annular sealing plate and the inner member is provided with an elastic member made of a material dissimilar to that for the elastic material . This elastic member may be a rubber coated layer, resin paint layer, a thin film of adhesive material or a ring-shaped rubber member. Thereby, any possible ingress of water across an engagement surface of the annular sealing plate is prevented, accompanied by increase of the lifetime of the bearing, with no problem associated with separation and displacement of the annular sealing plates. The magnetic flux density can also be easily secured.

A detector for detecting the rotating speed of a wheel bearing having a pulser ring mounted between bearing rings of a wheel bearing at one end thereof. One of the bearing rings is adapted to rotate together with a wheel and the other is fixed. A ring is provided axially outside of the pulser ring and press-fitted on the fixed bearing ring. A rotating speed sensor is mounted on the ring and has a detecting portion inserted in a hole formed in the ring. A seal member is provided in the space between the ring and the rotatable bearing ring to seal the space. In another arrangement, the ring is mounted on the fixed one of the bearing rings and the detected portion of the pulser ring is located opposite to the detecting portion of the rotating speed sensor with a radial gap defined therebetween.

Growing community of inventors

Iwata, Japan

Eiji Funahashi