Rolling Bearing

Abstract

When a minimum thickness of a part where an outer ring raceway is provided on a middle portion in the axial direction of an outer ring is h, and a diameter of each rolling element is Da, the relationship 0.4Da≦h 0.8Da is satisfied. As a result, even when the outer ring 4 a is fixed in a transmission case of low-rigidity, elastic deformation of the outer ring can be prevented without needlessly increasing the thickness h of the outer ring. When an outer diameter of an outer ring is D, a width of this outer ring in the axial direction is W, a minimum thickness of a part where the outer ring raceway is provided on a middle portion in the axial direction of the outer ring is h, and a diameter of each ball is Da, the respective dimensions are controlled such that a value K calculated by {(h 1.5 ·W)/(Da 1.1 ·D 0.5 )} satisfies the relationship 1.20≦K≦2.00. As a result, sufficient rigidity of the outer ring can be maintained, and premature flaking based on elastic deformation of the outer ring can be prevented without needlessly increasing the size of the outer ring.

1 . A rolling bearing comprising: 
 an inner ring formed with an inner ring raceway on an outer peripheral surface;    an outer ring formed with an outer ring raceway on an inner peripheral surface; and    a plurality of rolling elements rotatably provided between the inner ring raceway and the outer ring raceway,    and when an outer diameter of the outer ring is D, a width of the outer ring in the axial direction is W, a minimum thickness of a part where the outer ring raceway is provided on a middle portion in the axial direction of the outer ring is h, and a diameter of each rolling element is Da, the relationship 1.20≦{(h 1.5 ·W)/(Da 1.1 ·D 0.5 )}≦2.00 is satisfied.