Patent ID: 8829750

Claim:
An electric motor/gear mechanism unit comprising: a housing, an iron-free rotor winding rotatably arranged in an interior of the housing, a collector connected to the rotor winding, a rotor shaft extending through the collector, and a gear mechanism which is connected to the rotor shaft and which has an output shaft, wherein the gear mechanism is arranged in an interior of the rotor winding with an external, internally toothed annulus gear, wherein gears of the gear mechanism are produced from a non-magnetic material, the housing and the annulus gear being formed of a magnetically soft material, wherein the gear mechanism is a planetary gear unit, and wherein the planetary gear unit is configured such that it comprises at least one stage, each gear stage comprising a planetary carrier which is rotatable about an axis of rotation, a sun gear, an annulus gear and at least one planet gear, an end face of the planetary carrier further being provided with at least one journal which projects therefrom and on which the planet gear is rotatably supported, and at least said at least one planet gear of a first gear stage being implemented such that it is at least radially displaceable relative to an axis of rotation of the planetary carrier.