ROTATIVE-PERCUSSIVE DRILLING MACHINE Russian patent published in 2016 - IPC E21B6/00 E21C37/24 B25D9/06 

FIELD: mining.

SUBSTANCE: invention relates to drilling, namely to mechanisms with a pneumatic drive. Rotative-percussive drilling machine comprises a housing, combined with a handle, rotor, rotary mechanism, associated with a working tool with the help of a bushing and a harmonic gear drive, including a generator, rigid wheel and a flexible wheel, pneumatic percussion mechanism with a head, arranged in the housing of the rotor with a cylindrical longitudinal channel which connects a free running chamber of the pneumatic percussion mechanism with the power system, head divides the central cylindrical channel into free running chambers on the side of a working tool shank and a working stroke chamber on the side of a cover with a central hole, by which the working stroke chamber communicates with the power system, channels for discharging extracted air from the working stroke chamber and free running chamber into atmosphere are made in a rotor wall. Head has a central hole, in which there is a tube passing through the central hole of the cover to make an annular gap of the channel, communicating the working stroke chamber with the power system, and a central hole of the head, communicating the working stroke chamber and free running chamber with the power system.

EFFECT: reduced rotor misbalance and transverse vibrations, increased service life of bearings and reduced vibration level of the housing.

1 cl, 1 dwg