PERFORATOR Russian patent published in 2012 - IPC B25D16/00 B25D11/06 E21C37/24 

FIELD: machine building.

SUBSTANCE: invention relates to percussion tools, namely, to perforators. Proposed perforator comprises case, tool holder with bit, motor arranged behind tool holder and perpendicular to its axis, percussion mechanism and coupling mechanism. Reducing shaft is arranged in parallel with output shaft between that latter and tool holder. Reducing shaft has driven gear and herring-bone gear. Driven gear get in mesh with motor shaft while herring-bone gear engages with tool holder. Coupling pin is arranged in reducing shaft to slide along its axis. Coupling mechanism allow selecting drilling and perforator modes. Driven gear and reducing shaft are disengaged by said pin. Said pin passes through reducing shaft to engage with coupling section arranged on tool holder side and to lock tool holder. In perforator mode, selection may be made between neutral position whereat coupling pin is not engaged with coupling section, and locking position whereat said pin is engaged with coupling section to lock tool holder.

EFFECT: higher reliability, smaller sizes.

13 cl, 4 dwg