OUTER BEARING RETENTION STRUCTURES FOR RATCHET HAMMER MECHANISM

摘要

Provided are various embodiments of structures that may be utilized in a power driver, particularly in a power driver having an optional reciprocating "hammer" action, for retaining an outer bearing during assembly or operation of the power driver. In particular, the disclosed structures provide one or more surfaces, particularly inner peripheral surfaces, that limit outward axial movement of the bearing along the input shaft, These structures may include combinations of surfaces defined by retaining means, an input shaft, biasing means and chuck shields for positioning the outer bearing within the power driver.