Motor-driven hammer assembly - has gear output end with crank pin seated in planetary wheel rolling on inner stationary gear

摘要

The hammer tool consists of grip (3) with attached housing (1) in which electric motor (5) with cooling fan impeller (6) is fitted. The electric motor (5) has a shaft (9) with its end machined to form pinion (10) driving gear (12) provided with journal (11) seated in bearing (8). The other face of the gear (12) is fitted with pin (13) on which the planetary wheel (14) is seated. The planetary wheel (14) rolls off on inner gear (15). The rolling movement of the planetary wheel results in a rectilinear movement of crank pin (16) and a reciprocating movement of the tool along axis (19). The movement of the crank pin (16) drives cylinder (18) which operates via an air cushion piston (23) and striker (23), which operates by intermediary of anvil (24) the tool.