BORING RIG Russian patent published in 2007 - IPC E21B3/00 E21B19/84 

FIELD: mining, particularly devices for blast-hole drilling in excavation roof.

SUBSTANCE: drilling rig comprises slider movably installed on guiding column, rotator with drilling rod and feeding device having drive shaft kinematically connected with drilling rod and driven shaft provided with friction pulley. Flexible member connected to tightening device passes over friction pulley. Drive shaft of feeding device is hollow and has axial orifice. Rotator and feeding device are separate members, wherein rotator is installed in lower slider part and feeding device is located in upper part thereof so that drilling rod passes through drive shaft orifice.

EFFECT: increased drilling efficiency due to decreased power necessary for drilling rod rotation and reduced drilling crown blade wear.

3 cl, 2 dwg