Clutch for a screw gun

摘要

A clutch specially adapted for a screw gun includes an output clutch and a driving clutch. The output clutch is movable axially to engage the driving clutch. A helical spline arrangement on the driving clutch causes the driving clutch to move axially towards the output clutch a short distance when torque is transferred through the clutch. When the clutch slips and the torque is released, the driving clutch moves axially away from the output clutch a short distance and a gap is created between the output clutch and driving clutch which prevents clashing. Also, a retaining ring is mounted to an input spindle to limit the axial movement of the driving clutch.