Patent ID: 9249833
Filing Date: 2016-02-02
CPC Classification: F16C

Claim Text:
1. A tapered roller bearing comprising: an inner ring having an inner ring raceway surface and a large rib that is adjacent a first axial end of the inner ring raceway surface; an outer ring disposed radially outward of the inner ring so as to be concentric with the inner ring, and having an outer ring raceway surface that faces the inner ring raceway surface; a plurality of tapered rollers rollably disposed between the inner ring raceway surface and the outer ring raceway surface; and a cage that holds the tapered rollers at prescribed intervals in a circumferential direction of the tapered roller bearing, wherein each of the tapered roller has a roller large end face formed as a convex face, and a large rib end face of the large rib, which is in sliding contact with the roller large end face, is formed as a concave face; when a distance R is defined as a distance from a cone center of each of the tapered rollers to a prescribed reference point that is apart from the cone center along the inner ring raceway surface, the large rib end face is formed at such a position that the large rib end face passes through the reference point, and a curvature radius Ri of the large rib end face is set to a value within a range from 100% to 120% of the distance R, and the roller large end face is formed at such a position that the roller large end face passes through the reference point, and a curvature radius Rr of the roller large end face is set to a value within a range from 80% to 100% of the distance R.