Constant velocity universal joint

A constant velocity universal joint comprising:

• an outer joint member having three axial track grooves formed in an inner periphery thereof, each of said track grooves having axial roller guideways on both sides thereof;
• a tripod member having three radially-projecting trunnions;
• and
• roller assemblies respectively mounted on said trunnions of said tripod member, said roller assemblies including rollers to be guided along said roller guideways in directions parallel to the axis of said outer joint member and support rings for supporting said rollers rotatably, said roller assemblies being capable of tilting movements with respect to said trunnions,
• the constant velocity universal joint further comprising
• tilt suppressing means for suppressing tilts of said roller assemblies within a cross section perpendicular to the axis of the joint due to inward components of load applied to contact portions between said trunnions and said roller assemblies,
• wherein said tilt suppression means are effected by establishing two-point angular contact between the outer peripheries of said rollers and said roller guideways, and making the contact angle at angular contact points on the trunnion-bottom sides greater than the contact angle at angular contact points on the trunnion-extremity sides.