Patent ID: 7591730

Claim:
A constant velocity fixed joint comprising; an outer joint part having a longitudinal axis (L 12 ), and an attaching end and an aperture end positioned axially opposite one another, and outer ball tracks; an inner joint part having a longitudinal axis (L 13 ), an attaching mechanism 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 which each accommodate a torque transmitting ball, wherein each two adjoining pairs of tracks comprise outer ball tracks whose center lines are positioned in planes (E 1 , E 2 ) which extend substantially parallel relative to one another, and inner ball tracks whose center lines are positioned in planes (E 1 ′, E 2 ′) which extend substantially parallel relative to one another; and an annular ball cage between the outer joint part and the inner joint part and comprising circumferentially distributed cage windows which each accommodate the torque transmitting balls of two of said adjoining pairs of tracks; wherein, in an aligned joint, centers (K 1 , K 2 ) of the balls are held by the ball cage in the joint center plane (EM) and, when the joint is articulated, the ball centers are guided onto the angle-bisecting plane between the longitudinal axes (L 12 , L 13 ); wherein track cross-sections of the outer ball tracks and the inner ball tracks of each pair of tracks are symmetrical relative to axes of symmetry (ES 1 , ES 2 ) which, together with the outer and inner ball track planes (E 1 , E 2 , E 1 ′, E 2 ′), form identically sized angles (φ 1 , φ 2 ) opening in opposite directions, and each comprise a common point (M, M′); and wherein the track cross-sections of the outer ball tracks and the inner ball tracks are formed so as to generate contact with the balls in two points.