Patent ID: 11919733
Assignee: ACHENBACH BUSCHHÜTTEN GMBH & CO. KG
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A reel for winding or unwinding a strip-shaped material, the reel comprising:
a frame, at least one reel head for disposing a coil for winding or unwinding material, a drive arrangement having at least one electric motor, and a shaft that connects the at least one electric motor to the at least one reel head, the at least one electric motor comprising a stator and a rotor and disposed on the frame,
wherein:
the at least one electric motor is a torque motor or a synchronous motor, the shaft connects the rotor directly to the at least one reel head, the rotor being mounted on the stator so as to be axially displaceable relative to the stator, and
wherein the stator is formed from a coil package having a plurality of coils and surrounds the rotor, the rotor is formed from a ring package having a plurality of rings, each ring of the plurality of rings having magnets on a circumference thereof, the rings of the plurality of rings being connected to each other, a length (LR) of the ring package being smaller than a length (LW) of the coil package relative to a longitudinal axis of the shaft, and
wherein a displacement range (V) of the rotor corresponds to a difference of the lengths (LW, LR).