Patent ID: 7396285

Claim:
A constant velocity joint in the form of a counter track joint comprising: an outer joint part comprising a first longitudinal axis (A 12 ) and an attaching end and an aperture end which are axially opposed relative to one another, and first outer ball tracks and second outer ball tracks; an inner joint part comprising a second longitudinal axis (A 22 ) and an attaching mechanism for a shaft pointing to the aperture end of the outer joint part, and first inner ball tracks and second inner ball tracks, the first outer ball tracks and the first inner ball tracks form first pairs of tracks with one another, and the second outer ball tracks and the second inner ball tracks form second pairs of tracks with one another, the pairs of tracks each accommodate a torque transmitting ball; and a ball cage positioned between the outer joint part and the inner joint part and comprising circumferentially distributed cage windows which each accommodate at least one of the balls; wherein, when the joint is in the aligned condition, an aperture angle (δ 1 ) of the first pairs of tracks opens in a central joint plane (E) form the aperture end to the attaching end of the outer joint part; wherein, when the joint is in the aligned condition, an aperture angle (δ 2 ) of the second pairs of tracks opens in the central joint plane (E) from the attaching end to the aperture end of the outer joint part, wherein central track lines (L 18 , L 19 ) of the first pairs of tracks each have a curvature with a radius (R 2 ) around a center point (M 2 ), said center point (M 2 ) being in an offset plane extending parallel to the central joint plane (E) and having an axial distance (O 2 ) therefrom; wherein, furthermore, said central track lines (L 18 , L 19 ) each have a turning point (T 1-2 ), said turning point (T 1-2 ) forming a transition from said curvature with radius (R 2 ) into a counter-curvature or into a straight line; wherein, a center angle (β) being defined between said central joint plane (E) and a line through said joint center M and said turning point (T 1-2 ), said center angle (β) being greater than 4°; and wherein, a turning point angle (α) being defined between said offset plane and a line through said center point (M 2 ) and said turning point (T 1-2 ), said turning point angle (α) being within a range of 10°≦α≦18°.