Homocinetic joint

A constant velocity joint having a first end (1) and a second end (2) and comprising an outer part (3) with a longitudinal outer part axis (4), with an aperture (5) which is centred on the longitudinal outer part axis (4) and extends axially through the outer part (3), with outer running grooves (6, 7) which are distributed in the aperture (5) around the longitudinal outer part axis (4);

• an inner part (8) which is arranged in the aperture (5) of the outer part (3), with a longitudinal inner part axis (9), with a spherical outer face (10) with inner running grooves (11, 12) which are distributed in the outer face (10) around the longitudinal inner part axis (9) and which are separated from one another by webs (13), wherein one outer running groove (6, 7) and one inner running groove (11, 12) each are arranged opposite one another and form a pair of tracks;
• a cage (14) which comprises a longitudinal cage axis (17), which is annular in shape and is provided with circular end apertures (21, 22) and comprises an outer face (15) and an inner face (16) and is arranged in the aperture (5) between the outer part (3) and the inner part (8), which is provided with windows (18) which correspond to the circumferentially distributed pairs of tracks, which extend between the inner face (16) and the outer face (15) and are arranged symmetrically relative to a central cage plane (E) on which the longitudinal cage axis (17) is arranged perpendicularly and which extend in the circumferential direction along a length (LF) which is greater than their width (BF), whose inner face (16) comprises an annular groove (16a) which extends symmetrically relative to the central cage plane (E) and intersects the windows (18) and which, laterally thereto, towards the end faces (19, 20), is provided with hollow spherical faces (16b, 16c) by means of which said cage (14) is guided on the outer face (10) of the inner part (8);
• a diameter (d) of the circular apertures (21, 22) is smaller than a diameter (D) of the spherical outer face (10) of the inner part (8);
• balls (24) of which one each is accommodated and guided in a window (18) and engages an inner running groove and outer running groove respectively, associated with the respective pair of tracks, wherein a width (BI) of the inner part (8), in the region of the webs (13), is greater than the length (LF) of the windows (18) in the circumferential direction and wherein a groove depth (NT) and a groove width (NB) of the groove (16a) of the cage (14) are dimensioned in such a way that, when introducing the inner part (8) into one of the apertures (21, 22) of the cage (14) in a position in which the longitudinal inner part axis (9) and the longitudinal cage axis (17) intersect one another approximately perpendicularly and in which there is contact between a web (13) of the inner part (8) and the groove (16a), the web (13a) arranged diametrically relative thereto can be introduced through the opening (21 or 22) into the cage (14).