Patent ID: 8430758

Claim:
A constant velocity fixed joint comprising: an outer joint part having a longitudinal axis (L 12 ), and a first side (S 1 ) and a second side (S 2 ) arranged so as to be axially opposite one another, and outer ball tracks; an inner joint part having a longitudinal axis (L 13 ) and an attaching mechanism for a shaft pointing to an aperture 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, the pairs of tracks 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 (EM) and, when the joint is articulated, they are guided onto an angle-bisecting plane between the longitudinal axes (L 12 , L 13 ), center lines (M 22 , M 23 ) of the outer and inner ball tracks are positioned in pairs of track planes (BE, BE*) which extend substantially symmetrically and parallel relative to radial planes (ER) through the joint, wherein an opening angle (α) between tangents (T 22 ′, T 23 ′) at track base lines which extend parallel to tangents (T 22 , T 23 ) at the center lines (M 22 , M 23 ) of the outer and inner ball tracks in the joint center plane (EM), opens from the second side (S 2 ) to the first side (S 1 ) when the joint is in the aligned condition with coinciding longitudinal axes (L 12 , L 13 ), in the outer joint part, in a region from the joint center plane (EM) to the first side (S 1 ), the center line (M 22 ) of the outer ball tracks departs radially inwardly, a first reference radius (RB) whose radius center (MBE) is positioned in a point of intersection of a perpendicular line on the tangent (T 22 ) at the center line (M 22 ) of the outer ball track in the joint center plane (EM) and of a parallel axis (PE, PE*) extending parallel to the outer joint part longitudinal axis (L 12 ) through a track plane (BE, BE*), in the inner joint part, in a region from the joint center plane (EM) to the second side (S 2 ), the center line (M 23 ) of the inner ball tracks departs, radially inwardly, a second reference radius (RB′) whose radius center (MBE′) is positioned in a point of intersection of a perpendicular line on the tangent (T 23 ) at the center line (M 23 ) of the inner ball track in the joint center plane (EM) and of a parallel axis (PE, PE*) extending parallel to the inner joint part longitudinal axis (L 13 ) through a track plane (BE, BE*), in the outer joint part, in a region from the joint center plane (EM) to the second side (S 2 ), the center line (M 22 ) of the outer ball tracks moves radially outwardly relative to said first reference radius (RB), in the inner joint part, in a region from the joint center plane (EM) to the first side (S 1 ), the center line (M 23 ) of the inner ball tracks moves radially outwardly relative to said second reference radius (RB′).