| 摘要 |
Disclosed is a hub formed of plastic which carries a fan spider or a blower wheel and has a central bore to accommodate a motor shaft. A cavity is formed in the hub and accommodates a resilient leaf which is threaded on a shaft-engaging set screw extending radially into the central bore. Tightening the set screw on the shaft distorts the resilient member and the internal restoring force thereby exerted by the resilient member holds the hub locked on the shaft despite the normal cold-flow or creep of the hub material.
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