Patent ID: 7758430

Claim:
A structure for a tripod constant velocity joint, comprising: an inner roller and an outer roller provided between a track of a housing and a trunnion of a spider; a roller groove formed on a central portion of an outer surface of the outer roller in a circumferential direction of the outer roller; and at least four recesses formed on a surface of the trunnion to reduce a contact area with the inner roller wherein each of the recesses of the trunnion is formed between a wide angle part and a narrow angle part, the wide angle part being formed in a rotating direction of the trunnion on a section contacting a pitch circle of the trunnion, and the narrow angle part being formed in a direction perpendicular to the rotating direction of the trunnion and being narrower than the wide angle part, and the wide angle part and the narrow angle part are formed at the same rotation radius from a central axis of the trunnion.