Patent ID: 8480308
Filing Date: 2013-07-09
Classification: F16C

Abstract:
1. A tapered roller bearing comprising: an outer ring; an inner ring; a plurality of tapered rollers interposed between the outer ring and the inner ring; and a cage for the tapered rollers, wherein Ra is smaller than Rb where Ra represents a radius of curvature of a large end face of the tapered roller and Rb represents a radius of curvature of an end face of a large rib portion of the inner ring, wherein RCO/LRO is within a range of 30 to 150, and RCI/LRI is within a range of 50 to 260 where RCO represents a crowning radius of the outer ring, LRO represents a raceway length of the outer ring, RCI represents a crowning radius of the inner ring and LRI represents a raceway length of the inner ring, wherein a crown of each of raceway surfaces of the inner and outer rings has a vertex of the crown located at a center of the raceway length of each of the raceway surfaces of the inner and outer rings, and wherein a crown of a rolling contact surface of the tapered roller has a vertex of the crown located at a center of a roller effective length of the rolling contact surface.