Patent ID: 6709164
Filing Date: 2004-03-23
Classification: F16C

Abstract:
A tapered roller bearing having a center axis, comprising:an outer race having an inner peripheral surface with a raceway surface formed therearound in a concave shape in on axial direction; an inner race having an outer peripheral surface with a raceway surface formed therearound in a concave shape in the axial direction; and a plurality of rolling elements having a rolling contact surface and located between the raceway surfaces so that the rolling contact surface is defined by third generatrices having a fixed radius of curvature R3 to be convex in the axial direction; wherein the raceway surfaces have a center section and opposite ends in the axial direction adjacent to the center section, wherein the center section is defined by first generatrices having a fixed radius of curvature R1 in a concave-shape in the axial direction and that the radius of curvature R1 of the outer race is located away from the center axis of the tapered roller bearing, wherein the opposite ends are defined by second generatrices having a fixed radius of curvature R2 such that the opposite ends separate from the rolling contact surface of the rolling element; and wherein the radius of curvature R3 of the rolling contact surface satisfies Equation [1] below: R3=sÃ—R1 wherein 0.65&lE;s&lE;0.95â€ƒâ€ƒEq. [1].