HOLLOW PISTON HAMMER DEVICE WITH AIR EQUILIBRATION AND IDLE OPENINGS

摘要

An air spring hammer device comprises a drive piston (3), moving axially back and forth, with a front face of hollow embodiment and a hammer piston (6) moving in said hollow. A ventilation slot (13) is embodied in a guide wall (5) of the drive piston (3). The drive piston (3) may be guided in a guide tube (15). The guide tube (15) comprises several idle openings (16). A moving control element (17) is arranged on the exterior of the guide tube (15), in which control openings (18), corresponding to the idle openings (16), are provided. In an idle operating mode, the control element (17) is in an open position, by means of which the ventilation slot (13), the idle openings (16) and the control openings (18) can be brought into connection with the environment.