Ntn Corporation

Yukihiro Takeda

Hideshi Nishiwaki

Seiichi Takada

Yasuhiko Shimizu

Hirofumi Yoshida

Makoto Tanaka

The bearing unit includes a bearingand bearing unit forming component parts such as, for example, a housingin which the bearing is incorporated, a shaft, coversandand a sealing memberfor the housing. In this bearing unit, at least one of the bearing unit forming component parts is fitted with an IC tagand an IC tagis also fitted to the bearing. The IC tagfitted to the bearing unit forming component part is of a read/write type whereas the IC tagfitted to the bearingis of a read-only type. The read-only IC tagfitted to the bearingis recorded with information necessary to correlate the bearing unit forming component part, to which the IC tagis fitted, with the bearing unit

IC tag equipped bearing unit

A gas vent plug is mounted in an aperture communicating with a bearing cavity, and includes a metal annular body, and an elastic tubular body constituted of an elastic member in tube form, integral with the metal annular body, and having a vent at one end face of the tube, protruding outwards in the axial direction of the tube. A circular groove is provided at one end face of the elastic tubular body so as to encircle the vent. Accordingly, variation in the working pressure is eliminated even in the case where the interference is increased when the gas vent plug is mounted in the aperture.

Gas vent plug, bearing device, and bearing

A bearing assembly includes a full type tapered roller bearing and a roller presser which prevents separation of the rollers not only during transportation but while the outer ring is not mounted. The roller presser includes a ring member, and a plurality of arms extending from one side of the ring member. Each arm is inserted in one of the triangular spaces defined by the tapered raceway of the outer ring and the adjacent tapered rollers. The arms press the rollers against the inner ring. A pair of diametrically opposed bridges are provided, each extending between the free ends of a pair of adjacent arms. The bridges engage two diametrically opposed rollers, thereby preventing separation of the rollers not only during transportation but also while the outer ring is not mounted.

Growing community of inventors

Kuwana, Japan

Yukihiro Takeda