Patent ID: 9222506
Filing Date: 2015-12-29
Classification: F16C

Abstract:
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 rollers 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; a key inserted into the first key groove and the second key groove, and a seal provided between the inner and outer rings at the axial end portion of the inner ring; wherein 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 wherein 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, wherein the key is in a shape of a quadrilateral prism or cylinder.