Patent ID: 6241615
Filing Date: 2001-06-05
Classification: F16D,Y10S

Abstract:
A constant velocity fixed joint comprising:an outer part (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 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) starting from the first open end (10) and extending in a curve-like and undercut-free way towards the second open end (11) and the second outer running grooves (15) starting from the second open end (11) and extending towards the first open end (10) in a curve-like and undercut-free way;an inner part (3) arranged in the cavity of the outer part (1) comprising a longitudinal inner part axis (7), a spherical outer face (19) and first inner running grooves (17) and second inner running grooves (18) which extend in the spherical outer face (19) 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 in a curve-like and undercut-free way towards the second open end (11) 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 in a curve-like and undercut-free way towards the first open end (10);an angular cage (4) comprising an outer face (22), an inner face (21), a longitudinal cage axis (8) and windows (25) which are distributed in accordance with the pairs of opposed first outer running grooves (14) and first inner running grooves (17) as well as with the pairs of second outer running grooves (15) and second inner running grooves (18) and which are open towards said grooves, said windows (25) comprising guiding faces (23, 24) which are offset along the longitudinal cage axis (8) and are arranged opposite one another, and said annular cage (4) further comprising outer lugs (29) which project from the outer face (22) and which are arranged in the region of the windows (25) to one side of the guiding faces (23, 24) for the purpose of outwardly lengthening the latter, and with said annular cage (4) being arranged between the inner part (3) and the inner face (9) of the outer part (1), with its outer face (22) being held at a distance from the inner face (9); anda plurality of balls (5) wherein each ball is associated with a window (25) for the purpose of engaging an associated first outer running groove (14) and first inner running groove (17) as well as an associated second outer running groove (15) and a second inner running groove (18), and which are guided between the guiding faces (23, 24);wherein the outer face (22) of the cage (4), in the circumferential direction between the outer lugs (29), comprises a cylindrical portion (27) whose axis is formed by the longitudinal cage axis (8) and whose cylinder diameter (DZ) is smaller than the free open diameter (DD) of the first open end (10) and wherein the outer face (22) of the cage (4) is provided with end portions (28) which extends inside an envelope sphere (HK) which envelops same and whose center is located in the point of intersection (0) between a plane (26) and the longitudinal cage axis (8), which plane (26) contains the centers of all windows (25) between the guiding faces (23, 24), and wherein the diameter (DK) of the envelope sphere (HK) is greater than the cylinder diameter (DZ).