Constant velocity universal ball joint with noise-reducing cage stop faces

A constant velocity universal ball joint comprising:

• an outer joint part with substantially longitudinally extending outer ball tracks;
• an inner joint part with substantially longitudinally extending inner ball tracks, said tracks in the outer joint part and inner joint part being positioned radially opposite one another to form pairs;
• torque-transmitting balls being jointly received in said track pairs;
• and
• a ball cage including circumferentially distributed cage windows, said cage holding the balls in a common plane and guiding said balls on to the angle-bisecting plane when the joint is articulated, said cage windows having a greater extension than said balls in the circumferential direction, and, in longitudinal section, said cage windows narrowing radially inwardly, circumferentially extending flanks of said cage windows forming a stop relative to the respective balls during a relative radial displacement between the ball cage and the balls.

A constant velocity universal ball joint comprising:

• an outer joint part with substantially longitudinally extending outer ball tracks;
• an inner joint part with substantially longitudinally extending inner ball tracks, said tracks in the outer joint part and inner joint part being positioned radially opposite one another to form pairs;
• torque-transmitting balls being jointly received in said tracks;
• a ball cage including circumferentially distributed cage windows, said cage holding the balls in a common plane and guiding the balls on to the angle-bisecting plane when the joint is articulated, said cage windows having a greater extension in the circumferential direction than said balls;
• and
• a resilient coating material on one of the mutual guiding surfaces of the outer joint part and ball cage facing one another.