Patent ID: 8939044
Filing Date: 2015-01-27
Classification: F16C,F16H,Y10T

Abstract:
1. A retainer made of a synthetic resin for use in a deep groove ball bearing, said retainer comprising: a cylindrical first split retainer member made of a synthetic resin; and a cylindrical second split retainer member made of a synthetic resin and configured to be inserted in the first split retainer member, wherein the first split retainer member has a first axial side in which first cutouts are formed so as be circumferentially spaced apart from each other, and the second split retainer member has a second axial side in which second cutouts are formed so as be circumferentially spaced apart from each other, an axial direction of the first and second split retainer members being perpendicular to a circumferential direction of the first and second split retainer members, wherein a coupling arrangement is configured to keep the split retainer members axially joined to each other with the second split retainer member being inserted into the first split retainer member, wherein the first cutouts and the second cutouts are arranged in pairs when the split retainer members are joined, and each pair forms a circular pocket when the second split retainer member is inserted into the first split retainer member for receiving a ball of the deep groove ball bearing in the circular pocket, wherein the split retainer members are configured such that a radially outer surface portion of the second split retainer member protrudes beyond a distal end of the first split retainer member in the axial direction when the split retainer members are joined, and the radially outer surface portion of the second split retainer member has a diameter smaller than a diameter of a radially outer surface of the first split retainer member, wherein the split retainer members are configured such that a radially inner surface portion of the first split retainer member protrudes beyond a distal end of the second split retainer member in the axial direction when the split retainer members are joined, and the radially inner surface portion of the first split retainer member has a diameter larger than a diameter of a radially inner surface of the second split retainer member.