PERCUSSIVE-ROTARY MECHANISM Russian patent published in 1995 - IPC

FIELD: drilling of blast holes. SUBSTANCE: percussive-rotary mechanism has body accommodating coaxially arranged spindle and rod, spring-loaded pushers connected by means of levers with sliders, one of which is disengageable with spindle and disk cam disengageable with pushers. To increase operate reliability, rod has half-coupling whose end face is conical in shape and disk cam is installed on rod and spring-loaded relative to half-coupling. One slider is installed on disk cam, and other slider is installed on half-coupling for rotational and translational motion. EFFECT: higher efficiency. 2 dwg