| 摘要 |
An electromagnetically actuated wrap spring clutch is provided. The inventive clutch includes a shaft hub disposed about a longitudinal axis and an input hub that is coaxial with the shaft hub. The input hub includes a first portion having a first diameter and a second portion having a second diameter wherein the second diameter is smaller than the first diameter and the second portion is nearer the shaft hub than the first portion. The clutch also includes a spring connected to the input hub and disposed radially outwardly of a portion of the shaft hub and the first and second portions of the input hub. The spring may be symmetrical, having a uniform diameter and including first and second tangs disposed at either end of the spring wherein both tangs extend radially outwardly. The clutch further includes a control collar connected to the spring and a coil disposed about shaft hub. The use of the multiple diameter input hub and symmetrical spring reduce assembly time, cost, and clutch engagement time.
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