A Brief Introduction To Hammer Drills

Hammer drill with a hammer tube rotatably mounted in the housing, which can be driven in rotation via a transmission gear of a transmission, which is arranged on the hammer tube, and has a hammer mechanism arranged in the hammer tube , the percussion mechanism has a piston that can be driven into a reciprocating stroke, and has a work type changeover switch for the work types "hammer drilling" and "chiseling", the work type changeover switch having a manually operable Switching knob and a switching mechanism connected to the switching knob, which couples the hammer tube to the transmission gear in the set position of the switching knob "hammer drilling" and makes the hammer tube non-rotatable in the set position "drilling" is fixed in the housing, characterized in that the switching mechanism has a switching ring which can be fixed on the hammer tube in a non-rotatable and axially movable manner, the switching ring on its outer side facing away from the hammer tube has at least one radial A protruding locking cam, which is designed to be inserted into at least one axial groove fastened to the transmission gear on the one hand with a positive fit in the circumferential direction and on the other hand with a positive fit in the circumferential direction Inserted into the axial tooth portion fixed to the housing.