Luftfederschlagwerk mit Rückholluftfeder

摘要

A pneumatic percussion power tool has a percussion tool housing (1), in which a drive piston (2) and a percussion piston (9) are movable in axial direction. The motion of the drive piston (2) generated by a crank mechanism is transmitted to the percussion piston (9) through a pneumatic spring in a first chamber (10), said piston cyclically striking a ram (11) or a tool. The backward motion of the percussion piston (9) rebounding from the ram (11) is supported by increasing air pressure in a third chamber (15) that is supplied with air by the drive piston (2) through a second chamber (14) and a communicating channel (13).