Patent ID: 6176787
Filing Date: 2001-01-23
Classification: F16D,Y10S

Abstract:
A tripod type constant velocity joint comprising:a tripod housing defining an opening, the tripod housing being formed with three track grooves which are communicated with the opening and are uniformly spaced apart from one another in a circumferential direction, each track groove having a contact groove formed in a side wall section thereof, the contact groove having a bottom wall part which defines a guide surface,a spider disposed in the opening of the tripod housing and having three trunnions which project from an outer surface thereof to be inserted into the three track grooves, respectively, andthree pairs of a needle roller, a spherical roller and a cylindrical roller, which are sequentially and diametrically fitted around the three trunnions of the spider, respectively, the cylindrical roller being engaged into the contact groove;wherein one portion of the guide surface of the contact groove is lengthened at its upper end and the other portion of the guide surface of the contact groove is lengthened at its lower end so that a left upper end and a right lower end of the cylindrical roller are in contact with a left upper end contact point and a right lower end contact point which are defined in the contact groove, respectively, or a right upper end and a left lower end of the cylindrical roller are in contact with a right upper end contact point and a left lower end contact point defined in the contact groove, respectively.