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US 8,552,675 B2Granted
Motor
AssigneeNidec Corporation
InventorsKyohei Asahi, Eiji Furutachi
Life of this patent
Estimating the term…
Abstract
A motor includes a sensor magnet having a non-circular contour and a magnet cover fixed to an end portion of a shaft to cover the end portion of the shaft. The magnet cover includes a support portion positioned outside the end surface of the end portion of the shaft. In the support portion, a magnet hole having a non-circular cross section as the sensor magnet and extending in the direction of the rotation axis is provided. The sensor magnet is inserted into the magnet hole and fixed to the magnet hole.
Claims8
A motor comprising:
- a motor shaft;
- a sensor magnet;
- and
- a cover member fixed to an end portion of the motor shaft and arranged to at least partially cover an end portion of the motor shaft;
- wherein
- the cover member includes a support portion positioned outside an end surface of the end portion of the motor shaft, the support portion is provided with a space area having a substantially non-circular cross section which extends along a rotation axis, the sensor magnet having a non-circular outer contour which substantially conforms with the cross section of the space area, the sensor magnet being located in the space area;
- the space area has a depth that is greater than a thickness of the sensor magnet in a direction of the rotation axis;
- and
- a gap is defined between an axially lower surface of the sensor magnet and an axially uppermost portion of the motor shaft.
6 more elements
Dependencies are inferred from the claim text.