Hammer drill with a mode changeover mechanism

摘要

A hammer drill/driver (10) with a motor (14) having an output member (20), a planetary transmission (16), a clutch assembly (18) and a clutch bypass. The planetary transmission, which includes a ring gear (310), receives rotary power from the output member (44) and produces a rotary output (460). The clutch assembly (18) has a clutch profile (316), which is coupled to the ring gear (310), and a first pin assembly (702) having a first follower (740), a first pin member (720) and a first spring (722) that biases the first follower (740) into contact with the clutch profile (316). The clutch bypass (18b) has a bypass profile, which is coupled to the ring gear (316), and second pin assembly having a second follower, a second pin member, a third spring, which biases the second follower away from the bypass profile, and a fourth spring, which biases the second follower away from the second pin member. A method for operation of a hammer drill/driver is also provided.