Shaft assemblies suitable for circuit breakers and related circuit breakers

摘要

Shaft assemblies include an elongate shaft having a plurality of closely spaced apart external notches with wall segments having a greater outer diameter than an outer diameter of the notches residing therebetween and at least one self-retaining locking ring that engages one of the notches to axially lock into position on the shaft and provide a pull out force that is between about 100 lbf to about 1000 lbf. The notches can have a width that is between about 0.010 inches to about 0.020 inches, on average, and a depth that is between about 0.001 inches to about 0.010 inches, on average.

主权项

1. A cam assembly for a circuit breaker, comprising:
a shaft comprising at least one notch; a cam held on the shaft; and at least one self-retaining locking ring that directly engages a respective one of the at least one notch to lock the cam in an axial position on the shaft, wherein the at least one notch comprises at least one circumferentially extending notch that is discontinuous about a perimeter of the shaft with opposing perimeter portions of a respective notch being separated by at least one flat segment.