Electric motor with brush plate
AssigneeHilti Aktiengesellschaft
InventorsHelmut Burger, Stefan Aust
Life of this patent
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Abstract
An electric motor fixedly axially securable in a housing includes a brush plate with a plurality of axially projecting, uniformly circumferentially distributed, convexly shaped, locking segments formed on the brush plate. The brush plate and the locking segments may be formed of an injection-moldable plastic material. The locking segments may be spherically shaped, and the there may be four locking segments. The brush plate may include a plurality of radial, circumferentially distributed, stop surfaces with which are associated a corresponding plurality of radially inwardly projecting radial guides in the housing.
Claims5
An electric motor fixedly axially secured in a housing (1), comprising:
- a brush plate (5) having, as monolithically formed elements thereof, a plurality of locking segments (7), wherein the locking segments (7) are axially projecting, uniformly circumferentially distributed, convexly shaped, locking segments (7) each of which is monolithically formed on the brush plate (5), with each locking segment (7) contacting the housing (1) at a respective initial contact region (10a) of each locking segment (7), and with each initial contact region (10a) having a respective first surface area;
- wherein each of the plurality of locking segments (7) responds to pressure on the housing (1) to form a respective pressure contact region (10b) having a second surface area larger than the first surface area.
Dependencies are inferred from the claim text.