FIFTH-WHEEL AND COUPLING METHOD THEREFOR

The invention relates to a fifth-wheel coupling for releasably coupling a fifth-wheel tractor (10) to a semitrailer (20), comprising a fifth-wheel plate (1) on the fifth-wheel tractor (10), a kingpin (2), which is arranged on the semitrailer (20) and can be brought into engagement with the fifth-wheel plate (1) and is provided with an inner bore (21) oriented coaxial to the kingpin axis (Z), and an electrical and pneumatic insertion coupling for releasably connecting electrical and pneumatic lines (32, 31) between the fifth-wheel tractor (10) and the semitrailer (20), wherein the insertion coupling has a first insertion coupling part (11) on the fifth-wheel plate (1) and a second insertion coupling part (22) in the inner bore (21) of the kingpin (2), which are rotationally symmetric and can be inserted one into the other and can rotate relative to each other about the kingpin axis (Z), and the first insertion coupling part (11) is arranged on the fifth-wheel plate (1) in such a way that the first insertion coupling part can be moved by means of a lifting device (12) from a decoupled, retracted idle position (R) into a protruding coupling position (K) in which the first insertion coupling part is coupled into the second insertion coupling part (22), wherein a centering unit (13) is provided on the lifting device (12), which centering unit centers the relative position of the first insertion coupling part (11) in the idle position (R), wherein the centering is released in the coupling position (K) of the first insertion coupling part (11) in the second insertion coupling part (22) after the coupling operation. The invention further relates to a method for coupling a fifth-wheel coupling. L'invention concerne une sellette d'attelage pour l'accouplement détachable d'un tracteur de semi-remorque (10) à une semi-remorque (20), comprenant un plateau de sellette (1) sur le tracteur de semi-remorque (10), un pivot d'attelage (2) disposé sur la semi-remorque (20) et pouvant être amené en prise avec le plateau de sellette (1), lequel pivot d'attelage est pourvu d'un alésage intérieur (21) orienté coaxialement à l'axe du pivot d'attelage (Z), et un accouplement enfichable électrique et pneumatique pour la liaison libérable de lignes électriques et pneumatiques (32, 31) entre le tracteur de semi-remorque (10) et la semi-remorque (20), l'accouplement enfichable comprenant une première partie d'accouplement enfichable (11) sur le plateau d'attelage (1) et une deuxième pa