Patent ID: 9599160
Date: 2017-03-21
CPC Classifications: F16C

Claim:
1. A tapered roller bearing comprising: an inner ring having a tapered inner ring raceway surface; an outer ring having a tapered outer ring raceway surface; a plurality of tapered rollers that is able to roll on the inner ring raceway surface and the outer ring raceway surface, the tapered rollers each having a roller large end face that is a convex curved surface; and an annular cage that holds the tapered rollers at intervals along a circumferential direction, wherein the inner ring includes a large rib portion having, on a large diameter side thereof, a rib surface that is a concave curved surface and that contacts the roller large end face, and inequalities represented by R>Ri>Rr are satisfied, where Rr is a curvature radius of the roller large end face, Ri is a curvature radius of the rib surface in a longitudinal cross section of the inner ring, and R is a curvature radius of the rib surface when the rib surface is viewed from a radially outer side in a direction orthogonal to a virtual straight line connecting a cone center to a center of a contact ellipse obtained by contact between the roller large end face and the rib surface.