Patent ID: 8057312
Filing Date: 2011-11-15
Classification: F16C,F16D,Y10S

Abstract:
1. A tripod constant-velocity joint having a tubular outer member including three guide grooves defined in an inner wall thereof, the guide grooves being spaced a predetermined distance from each other and extending in axial directions, the tubular outer member being coupled to a first transmission shaft, and an inner member inserted in a hollow space inside the outer member and coupled to a second transmission shaft, comprising: a plurality of trunnions disposed on the inner member and projecting into the guide grooves; rollers having outer circumferential surfaces held in contact with side walls of the guide grooves of the outer member, the rollers being rotatable along the side walls; and a plurality of rolling bodies having flat bottom surfaces and interposed between the rollers and the trunnions, wherein each of the rolling bodies has a tapered reduced-diameter portion and a beveled surface, which are interposed between a constant-diameter main portion and the bottom surface, the beveled surface having a greater diameter reducing rate than the tapered reduced-diameter portion.