| 摘要 |
PROBLEM TO BE SOLVED: To supply a pocket part of a retainer and a raceway surface with a sufficient lubricant while maintaining stable rotational behavior of the retainer in an under race lubrication bearing. SOLUTION: A shape of the pocket part 2 of the retainer of the under race lubrication bearing is made in a deformed shape with a circumferential inside diameter to have a minimum length necessary for housing a rolling element and an axial inside diameter to have a length not less than the length required for housing the rolling element. The enlarged pocket parts 2 are made to be eccentric alternately in an opposite direction in an axial direction at every one or a plurality of the pocket part 2 in a circumferential direction of the retainer 1. When an inner ring 6 is rotated, oil feed holes 7, 8 are made to be repeatedly exposed with respect to a space of a gap formed in the pocket part 2 in an eccentric direction side of the pocket part 2. COPYRIGHT: (C)2005,JPO&NCIPI
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