| 摘要 |
A cylindrical roller bearing wherein the end surface of the rollers comes in contact with the guiding surface of the rib of the inner race with a contact ellipse therebetween, and at least one of the end surface and the guiding surface has a curved, convex surface, and provided that a second principal curvature plane passes through the center axis of the inner race and the center of the contact ellipse, that a first principal curvature plane perpendicularly crosses both the second principal curvature plane and the contact ellipse and extends through the center of the contact ellipse, that the cross sections of the end surface appearing in the first and second principal curvature planes have the principal radii (Rr2 and Rr1) of curvature, respectively, and that the cross sections of the guiding surface appearing in the first and second principal curvature planes have the proximal radii (Rf2 and Rf1) of curvature, respectively, the relationship between these principal radii of curvature is such that (1/Rf1)-(1/Rf2)+(1/Rr1)=(1/Rr2)<0.
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