ROLLING BEARING

摘要

An object of the present invention is to prevent abrasion powder from accumulating and stacking in pockets in a retainer of a roller bearing, thereby protecting the rollers from brinelling and loss of lubrication for extended life of the roller bearing. On an inner diameter surface of annular regions in the retainer, cutouts are formed from the retainer's axially outer side end surface toward an inner side. The cutout has an outer diametrical position on a more radially outer position than an outer diametrical end of the inner-side projection of the retainer. This improves an axial flow of lubricant oil from an inner diameter side of the retainer toward the cutout which is formed in the annular region, making it less likely that dust such as metal abrasion powder contained in the lubricant oil will stay at the inner-side projection of the pillar.

主权项

1. A roller bearing comprising: an outside member including an inner circumferential surface having a cylindrical outer ring track; an inside member including an outer circumferential surface having a cylindrical inner ring track; a plurality of rollers rotatable between the outer ring track and the inner ring track; and a retainer which holds the rollers at a predetermined interval in a circumferential direction; the retainer being cylindrical as a whole, formed with pockets at a predetermined interval in the circumferential direction for housing the rollers, a pillar between any two pockets which are mutually adjacent in the circumferential direction, and annular regions on two axial sides of the pillar; each pillar having inner-side projections and outer-side projections on a radially inner side and a radially outer side on two axial sides for preventing the rollers from dropping off; wherein the retainer's annular regions have their inner diameter surfaces formed with cutouts from the retainer's axially outer side end surface toward an inner side, the cutouts having their outer diametrical position being on a more radially outer position than an outer diametrical end of the inner-side projection of the retainer.