Patent ID: 8448430
Filing Date: 2013-05-28
Classification: F16C,F16H

Abstract:
1. A thrust roller bearing comprising: a plurality of rollers; a retainer to retain said plurality of rollers; an annular first track ring having a track surface on which said roller rolls, a cylindrical outer periphery flange part axially extending from an outer periphery end of said track surface, and a first claw part projecting from a tip end of said outer periphery flange part toward the inner diameter side to limit the axial movement of said retainer; and an annular second track ring having a track surface on which said roller rolls, a cylindrical inner periphery flange part axially extending from an inner periphery end of said track surface, and a second claw part projecting from a tip end of said inner periphery flange part toward the outer diameter side to limit the axial movement of said retainer, wherein bearing internal gaps to allow the eccentric rotation of said first track ring and said second track ring are provided between said outer periphery flange part and an outer edge part of said retainer, and between said inner periphery flange part and an inner edge part of said retainer, at least one of said first and second claw parts is a projection part formed by a bending process, and an edge part of said retainer opposed to said projection part has a first slope part formed at a corner part on the side opposed to said track surface, and a second slope part having a radial length relatively shorter than that of said first slope part, and formed at a corner part on the opposite side in a thickness direction, wherein an outer edge part of said retainer is folded back toward the radial inner side, and said first and second slope parts are formed at corner parts of said folded back portion.