Electric motor operated impeller
AssigneeRobert Bosch GmbH
InventorsClaude Bleger, Jochen Goehre, Claudius Muschelknautz
Life of this patent
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Abstract
An electric motor operated impeller has a drive motor having a motor shaft, a stator and a rotor rotated about a rotary axis, an impeller housing having a receiving casing which extends in direction of the rotary axis of the rotor and accommodating the electric drive motor. The receiving casing has a wall against which the stator of the drive motor radially abuts a bottom and an opposite edge. A support supports the shaft of the motor and is provided with throughflow openings for cooling air. The wall of the casing has at least one channel-shaped expansion extending parallel to the rotary axis and formed so that the expansion is open toward the edge of the casing and closed toward the bottom of the casing.
Claims5
An electric motor operated impeller, comprising a drive motor having a motor shaft , a collector and sliding brushes abutting against said collector, said brushes located diametrically opposite to one another, a stator and a rotor rotated about a rotary axis;
- an impeller housing having a receiving casing which extends in the direction of said rotary axis of said rotor and accommodates said electric drive motor, said receiving casing having a wall against which said stator of said drive motor radially abuts, a bottom and an opposite edge;
- supporting means for supporting said shaft of said motor and provided with throughflow openings for cooling air, said wall of said casing having at least one channel-shaped expansion extending parallel to said rotary axis and formed so that said expansion is open toward said edge of said casing and closed toward said bottom of said casing , said wall being provided with second such expansion, said expansions being located diametrically opposite to one another, and around said sliding brushes.
Dependencies are inferred from the claim text.