Patent ID: 7854658

Claim:
A constant velocity joint comprising: an outer joint part which comprises a first longitudinal axis and an attaching end and an aperture end arranged so as to be axially opposite one another, and outer ball tracks; an inner joint part which comprises a second longitudinal axis and an attachment for a shaft pointing towards the aperture end of the outer joint part, and inner ball tracks, the outer ball tracks and the inner ball tracks form pairs of tracks with one another which, each accommodate a torque transmitting ball; and an annular ball cage between the outer joint part and the inner joint part and comprising circumferentially distributed cage windows which each accommodate at least one of the torque transmitting balls, the centers of the balls are held by the cage in a joint center plane and, upon articulation of the joint, are guided onto an angle-bisecting plane between the first and second longitudinal axes, wherein center lines of the outer and inner ball tracks of pairs of tracks are positioned in radial planes through the joint, and for first pairs of tracks, a first opening angle (α 1 ) between tangents at track base lines extending parallel to tangents at the center lines of the ball tracks in the joint center plane when the joint is in the aligned condition with coinciding longitudinal axes, opens from the attaching end to the aperture end, for second pairs of tracks, a second opening angle (α 2 ) between tangents at track base lines extending parallel to tangents at the center lines of the ball tracks in the joint center plane when the joint is in the aligned condition with coinciding longitudinal axes, opens from the aperture end to the attaching end, and for the second pairs of tracks: in the outer joint part, the center line of the ball tracks of the second pairs of tracks in a region from the joint center plane to the attaching end radially inwardly departs a first reference radius centered in a point of intersection of a perpendicular line on a tangent at the center line of the ball track in the joint center plane and the first longitudinal axis, in the inner joint part, the center line of the ball tracks of the second pairs of tracks in a region from the joint center plane to the aperture end radially inwardly departs a second reference radius centered in a point of intersection of a perpendicular line on a tangent at the center line of the ball track in the joint center plane and the second longitudinal axis, in the outer joint part, the center line of the ball tracks of the second pairs of tracks in the region from the joint center plane to the aperture end moves radially outwardly beyond said first reference radius, and in the inner joint part, the center line of the ball tracks of the second pairs of tracks in the region from the joint center plane to the attaching end moves radially outwardly beyond said second reference radius.