Patent ID: 7270607
Filing Date: 2007-09-18
Classification: C21D,C23C,F16D,Y10S

Abstract:
1. A constant velocity universal joint, comprising: an outer coupling member; an inner coupling member; and a drive transmitting member operatively interposed between the outer and inner coupling members; wherein at least one of said outer coupling member, said inner coupling member, and said drive transmitting member has a carbonitrided layer, in which the outer coupling member has an inner peripheral surface formed with an axially extending track groove defined at three locations in a circumferential direction thereof and also has roller guide faces defined on respective sides of the track groove, the inner coupling member comprises a tripod member having a bearing shank formed at three locations in a circumferential direction thereof so as to protrude radially outwardly therefrom, and the drive transmitting member includes a roller rotatably mounted on the corresponding bearing shank through a plurality of needle rollers and operatively accommodated within the corresponding track groove in the outer coupling member, with an outer peripheral surface of said roller being guided by the roller guide faces.