Abstract: An articulated coupling joint (1) for rail vehicles comprises a first coupling part (2) which has an outer surface (4) which is curved in the form of a spherical surface and forms a first contact face (5), and comprises a second coupling part (3) which has an inner surface (7) corresponding to the outer surface (4) and forming a second contact face (6) and has a holding ring (10) which is suitable for producing a welded connection to a connecting structure, the coupling parts (2, 3) being pivotable relative to one another, and a sealing ring (8, 8?) which contacts both coupling parts (2, 3) being provided for protecting the contact faces (5, 6) of the coupling parts (2, 3).