Impact screwdriver, has air outlet hole of switching valve and through hole connected with forwardly rotating air inlet channel when through hole of switching valve aligns with rearwardly rotating-air inlet channel

摘要

The screwdriver has a motor housing (21) arranged in a receiving space (12) of an outer housing (11). An air outlet hole (424) of a switching valve (42) of a switch, and a through hole are connected with a rearwardly rotating-air inlet channel (24) when a through hole (423) of the valve aligns with a forwardly rotating-air inlet channel (23). Another air outlet hole (425) of the valve and another through hole (427) are connected with the forwardly rotating air inlet channel when the through hole of the valve aligns with the rearwardly rotating-air inlet channel.