Patent ID: 8814440
Filing Date: 2014-08-26
Classification: F16C

Abstract:
1. A thrust roller bearing comprising a plurality of rollers and an annular retainer having a plurality of pockets for containing the plurality of rollers, the annular retainer is not bent in a thickness direction and is guided by the plurality of rollers, the thickness direction which corresponds to a longitudinal axis of a rotational axis of the thrust roller bearing, wherein each of said plurality of pockets includes roller retaining parts retaining one of said plurality of rollers, each of the roller retainer parts includes a curved line, having a curvature radius, projecting toward said pocket in a cross section provided by cutting said retainer by a plane containing said roller retaining part and perpendicular to a center axis of said roller, and further wherein each of the pockets are arranged generally in a radial manner with respect to the rotational axis of the thrust roller bearing and the roller retainer parts prevent the plurality of rollers from dropping out from the annular retainer in the longitudinal direction of the rotational axis, wherein each said pocket has opposing circumferential side wall surfaces, and each of said roller retaining parts are provided on said circumferential side wall surfaces, and wherein said roller retaining parts include a first roller retaining part provided in one side wall surface of said pocket and abutting on said roller from the upper side of said roller, and a second roller retaining part provided in the other side wall surface of said pocket and abutting on said roller from the lower side of said roller, wherein the retainer is made of metal, and wherein a curvature radius of the roller is R