Patent ID: 8624455

Claim:
An electrical motor, comprising: a shaft; a rotor mounted on the shaft; a bearing unit for rotatably supporting the shaft; a rotor support shield dimensioned to extend to the shaft, with a gap being defined between confronting surfaces of the rotor support shield and the shaft and being sufficiently small to support the shaft, when the bearing unit is removed, said rotor support shield shaped to bound a grease chamber and to seal off the grease chamber with respect to the shaft, said grease chamber adapted for lubrication of the bearing unit and disposed axially outwards of the bearing unit; a hub connected to the rotor support shield, with the bearing unit being arranged axially inwards at a distance to the rotor support shield between the hub and the shaft; an external cover connected to the hub to seal the grease chamber against the outside; and a draw-off device arranged between the bearing outer ring of the bearing unit and the rotor support shield to allow the bearing unit to be withdrawn from the shaft.