ROLLING BEARING APPARATUS

摘要

In a creep preventing rolling bearing apparatus 21, an inner ring 12 is provided with a first key groove 13 opened at an inner peripheral face 12i in an axial end portion 12t. The first key groove 13 is provided so as to have a predetermined length L in the axial direction from the axial end portion 12t at a position having a certain depth D from an outer peripheral face 12o in a radial direction. A rotation shaft 17 is provided with a second key groove 13′ on an outer peripheral face 17o along an axial direction. The first key groove 13 and the second key groove 13′ are aligned and a key 18 is inserted, whereby the first key groove 13 and the second key groove 13′ are fixed at the same time.

主权项

1. A rolling bearing apparatus comprising:
a rolling bearing comprising an outer ring, an inner ring having a first key groove formed along an axial direction on an inner peripheral face of an axial end portion of the inner ring, and a plurality of rolling elements held between the inner ring and the outer ring in a rollable manner; a rotation shaft having a second key groove on an outer peripheral face thereof on which the rolling bearing is incorporated; and a key inserted into the first key groove and the second key groove, characterized in that the first key groove is opened at the inner peripheral face of the inner ring in the axial end portion of the inner ring, and the first key groove is formed so as to have a predetermined length in the axial direction from the axial end portion of the inner ring at a position having a certain depth from an outer peripheral face of the inner ring in a radial direction.