Ball Deflecting Chamfer

摘要

A cam shaft is disclosed having an asymmetric chamfer for guiding a ball bearing deeper into a cam shaft groove to avoid ball loss when an immediate deceleration force is applied. The chamfer spaces the ball from an opening in the front face of a hammer that moves axially relative to the cam shaft when a tool having the cam shaft and hammer is dropped. The ball is therefore less likely to escape through the front opening of the hammer when the impact wrench is dropped.

主权项

1. A cam shaft adapted for use in a tool, the cam shaft comprising:
a base; a shaft extending from the base in an axial direction; a cam shaft groove disposed circumferentially around the shaft and adapted to movably retain a ball, the cam shaft groove including a plurality of groove portions extending at an angle relative to the axial direction and intersecting at a vertex; and a chamfer defined within the cam shaft groove and adapted to deflect the ball away from the vertex and toward the base when a force in the axial direction is applied to the cam shaft.