| 摘要 |
The apparatus includes a motor with a shaft for rotating a fan. A retaining ring and a thrust washer are located around the shaft on one side of the hub of the fan and a torque washer is located on the outer side of the hub with the end of the shaft extending through a central aperture of the torque washer. The retaining ring supports the thrust washer and the thrust washer engages and supports the hub of the fan. The aperture of the torque washer and the side of the shaft at the end thereof have planar surfaces which engage each other which prevents rotation between the torque washer and the shaft. Bosses are formed on the outer side of the hub which fit into apertures formed through the torque washer outward of the central aperture to transfer torque radially outward to the hub. A screw has a threaded shaft extending through the central aperture of the torque washer and which is screwed into a threaded aperture formed in the end of the motor shaft to tighten the torque washer to the hub. The head of the screw has serrations for engagement with the torque washer to prevent the screw from being unscrewed from the shaft during rotation.
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