Bit retention device

摘要

A bit retention device includes a shaft having a sidewall defining a hexagonal cavity extending from a first end thereof and a ball groove extending through the sidewall and communicating with the hexagonal cavity. A ball is disposed in the ball groove and a ball spring engages the ball and biases the ball toward the first end. An actuator sleeve surrounding the shaft includes an internal ramp engaging the ball. A spring biased plunger assembly is disposed in the bore for biasing a bit received in the bore in a direction toward the insertion end.

主权项

1. A bit retention device, comprising:
a shaft having a front end, a rear end, a sidewall defining a bit receiving cavity extending from the front end toward the rear end, and an opening extending through the sidewall and communicating with the bit receiving cavity; a ball received in the opening; a ball spring substantially surrounding the shaft, and having an inward projecting portion that projects at least partially into the opening to bias the ball toward the front end, and that has a curvilinear shape that is complementary to a shape of the ball; and an actuator sleeve substantially surrounding the shaft and having an internal wall that engages the ball, wherein the actuator sleeve is moveable between a first position in which the internal wall pushes the ball radially inward toward the cavity, and a second position in which the internal wall allows the ball to move radially outward from the cavity.