Tripod type constant velocity joint

The tripod type constant velocity joint comprising:

• a housing having three track grooves which are defined at trisected positions of the housing along a circumferential direction;
• a spider having three trunnions of generally oval or elliptical cross-sectional shape which are projectedly formed at trisected positions of the spider to be respectively inserted into the track grooves of the housing, each of the trunnions having at least one independent contact surface on each side subjecting to a load;
• inner rollers each having an inner surface of a concavely curved contour for receiving a corresponding one of the trunnions therein;
• a plurality of needle rollers disposed to a circumferential outer surface of each inner roller;
• outer rollers each mounted on an outer surface of each inner roller with the needle rollers engaged there-between;
• and
• retainer rings and retainer clips, each of which installed on the outer surface of the respective inner roller such that they are spaced apart from the needle rollers and the outer rollers by a distance for allowing the needle rollers and the outer rollers to be sufficiently moved in an axial direction, and to prevent the needle rollers and the outer rollers from being released.

The tripod type constant velocity joint comprising:

• a housing having three track grooves which are defined at trisected positions of the housing along a circumferential direction;
• a spider having three trunnions of generally oval or elliptical cross-sectional shape which are projectedly formed at trisected positions of the spider to be respectively inserted into the track grooves of the housing, each of the trunnions having at least one independent contact surface on each side subjecting to a load;
• inner rollers each having an inner surface of a concavely curved contour for receiving a corresponding one of the trunnions therein;
• a plurality of needle rollers disposed to a circumferential outer surface of each inner roller;
• outer rollers each mounted on an outer surface of each inner roller with the needle rollers engaged there-between;
• and
• retainer rings and retainer clips, each of which installed on the inner surface of the respective outer roller such that they are spaced apart from the needle rollers and the outer rollers by a distance for allowing the needle rollers and the inner rollers to be sufficiently moved in an axial direction, and to prevent the needle rollers and the inner rollers from being released.

A tripod type constant velocity joint comprising:

• a housing having three track grooves which are defined at trisected positions of the housing along a circumferential direction;
• a spider having three trunnions, each of the trunnions having a neck portion, and a body portion of generally oval or elliptical cross-sectional shape which is projectedly formed at trisected positions of the spider to be respectively inserted into the track grooves of the housing, said body portion of generally oval or elliptical cross-sectional shape having two opposing side surfaces subjecting to a load and two opposing side surfaces not subjecting to a load, with a thickness between the two opposing side surfaces not subjecting to the load being smaller than that between the two opposing side surfaces subjecting to the load, each of the trunnions having at least one independent contact surface on each side of the two opposing side surfaces subjecting to the load, the at least one independent contact surface disposed on circumferential area of the opposing side surfaces subjecting to the load;
• inner rollers each having an inner surface of a concavely curved contour for receiving a corresponding one of the trunnions therein;
• a plurality of needle rollers disposed to a circumferential outer surface of each inner roller;
• and
• outer rollers each mounted on an outer surface of each inner roller with the needle rollers engaged there-between.