Torque-transmission device

In a winding device adapted to simultaneously wind several widths of material onto reel cores, the winding device having a driven reel axle on which at least one reel core is rotatably arranged, and having a torque-transmission device to transmit a torque from the reel axle to the reel core, the torque-transmission device having a sliding hub element disposed on the reel axle and a core-receiving element which slides in the reel core and which is affixed in the reel core in the rotating and axial directions, the improvement in the winding device comprising the torque-transmission device (3, 103) being disposed in the radial direction between the reel axle (1, 101) and the reel core (2, 102) completely inside said reel core (2, 102) wherein the hub element (4, 104) is attached to the reel axle (1, 101) in the axial direction, the torque-transmission device (3, 103) comprising a plurality of torque-transmission modules wherein each torque-transmission module has a hub module (11-13) disposed on the reel axle, a core-receiving module (24-26) which slides in the reel core and which is affixed in the reel core in the rotating and axial directions, and means (18-23, 118) for generating a magnetic coupling field between the hub module (11-13) and the core-receiving module (24-26) sufficient to transmit a torque from the hub module (11-13) to the core-receiving module (24-26), said hub modules (11-13) and said core-receiving modules (24-26) of adjacent torque-transmission modules being screwed together rigidly, respectively, to form said sliding hub element and said core-receiving element, so as to allow for shifting in the axial direction jointly, said generating means including means for changing the magnetic coupling field between each hub module (11-13) and its associated core-receiving module (24-26) by jointly shifting said core-receiving modules (24-26) axially, thereby jointly changing the magnetic coupling between each hub module (11-13) and the adjacent core-receiving module (24-26).