Constant velocity fixed joint comprising:
- an outer part (1, 1′) comprising a first open end (10) and a second open end (11), a longitudinal outer part axis (6), a cavity which is centered on the longitudinal outer part axis (6) and which is open towards both open ends (10, 11) and first outer running grooves (14) and second outer running grooves (15) formed in an inner face (9) delimiting the cavity, wherein the first outer running grooves (14) and the second outer running grooves (15) are arranged in a regular sequence around the longitudinal outer part axis (6) in planes which are distributed around the longitudinal outer part axis (6) and contain same, the first outer running grooves (14), while starting from the first open end (10), extending towards the second open end (11) and the second outer running grooves (15), while starting from the second open end (11), extending towards the first open end (10), both the first and the second outer running grooves (14, 15) extending in a curve-like and undercut-free way;
- an inner part (3) arranged in the cavity of the outer part (1, 1′) comprising a longitudinal inner part axis (7), a spherical face (19) and first inner running grooves (17) and second inner running grooves (18) arranged in the spherical outer face and extend in planes which are distributed around the longitudinal inner part axis (7) and contain same, each of the first inner running grooves (17) being arranged opposite a first outer running groove (14) and, while starting from the first open end (10), extending towards the second open end (11), in a curve-like and undercut-free way, and each of the second inner running grooves (18) being arranged opposite a second outer running groove (15) and, while starting from the second open end (11), extending towards the first open end (10) in a curve-like and undercut-free way;
- a cage (4) comprising a continuous inner cage face (21) which is centered on the longitudinal cage axis (8) and comprises hollow spherical portions (30) defining a groove (36), an outer face (22) delimited at least partially by a sphere in the form of an envelope sphere, as well as windows (25) with lateral guiding faces (23, 24), said windows (25) extending radially in accordance with the pairs of inner running grooves (17, 18) and outer running grooves (14, 15), the cage (4), by means of its hollow spherical portions (30) of the inner cage face (21), being guided on the spherical outer face (19) of the inner part (3) and with the outer face (22) of the cage (4) being arranged at a distance from the inner face (9) of the outer part (1, 1′) and comprising outer lugs (29) which increase the size of the two lateral guiding faces (23, 24) and project beyond the outer face (22), and all said windows (25) comprising a common central plane (26) extending centrally between the lateral guiding faces (23, 24);
- and
- a plurality of balls (5) wherein each ball is received by opposed inner running grooves (17, 18) and outer running grooves (14, 15) and are guided in the windows (25) of the cage (4) between the lateral guiding faces (23, 24).