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US 2011/0254395 A1Published application
Electrical motor having rotor support shield
AssigneeSiemens Aktiengesellschaft
InventorsDaniel Friedl, Oliver Memminger
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AssigneeSiemens Aktiengesellschaft
InventorsDaniel Friedl, Oliver Memminger
Estimating the term…
A bearing change in an electrical motor and in particular a generator having permanent magnetic excitation should be able to be carried out safely. To this end, the invention relates to an electrical motor having a shaft (2) on which a rotor is mounted and a bearing unit (5) by means of which the shaft (2) is rotatably mounted. In addition, the electrical motor has a rotor support shield (1) to which the bearing unit (5) is fastened. Furthermore, the rotor support shield (1) is sized so as to be capable of supporting the shaft (2) when the bearing unit (5) is removed and seals a grease chamber (8) of the bearing unit (5) opposite the shaft (2). With the rotor support shield, a permanent magnet-equipped rotor can in particular be prevented from coming into contact with the stator when the bearing is removed.
-11. (canceled)
An electrical motor, comprising:
The electrical motor of claim 1, wherein the bearing unit is a roller bearing.
The electrical motor of claim 1, wherein the rotor support shield is a single-piece part.
The electrical motor of claim 1, wherein the rotor support shield has a peripheral groove which forms part of the grease chamber of the bearing unit.
The electrical motor of claim 1, wherein the rotor support shield and the shaft are spaced from one another at a clearance which is smaller than 0.5 mm, when the electrical motor is ready for operation.
The electrical motor of claim 1, wherein the draw-off device has a ring-shaped configuration and includes a plurality of threaded bores for accepting screws when withdrawing the bearing unit, said screws being supported on the rotor support shield to generate an axial draw-off force.
The electrical motor of claim 1, further comprising a hub screwed to the rotor support shield for support of the bearing unit.
The electrical motor of claim 1, constructed in the form of a permanent magnet generator.
Dependencies are inferred from the claim text.