| 摘要 |
Disclosed is a hub formed of plastic which carries a fan spider, blower wheel or other driven member and has a central bore to accommodate a motor shaft. A cavity is formed in the hub and accommodates a resilient leaf is 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. A reinforcing steel band in the hub extends from the areas of engagement of the distorted resilient member with the cavity walls to and around a portion of the central bore surface.
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