Electric hand tool unit, e.g. drill, has driven part with radially outward extending cam narrower in peripheral direction than recess it engages; torque coupling takes place via protrusions and cam

摘要

The device has a drive part (12) with protrusions (28) joined together in the peripheral direction and within an opening by a wall section to bound a radially inwardly open recess (32). A driven part (14) has a radially outward extending cam (34) narrower than the recess in the peripheral direction that engages the recess, whereby the torque coupling between the parts takes place via the protrusions and cam.