PERCUSSIVE-INDEXING MECHANISM Russian patent published in 2003 - IPC

FIELD: mining and construction industry, hole punching in bricks and concrete. SUBSTANCE: percussive-indexing mechanism has body with conical surface, disc cam with inner curvilinear surfaces contacting rollers of pushers, central rod, head put on it concentrically, spindle of tool with cylindrical tail part placed concentric in longitudinal hole of central rod and fitted with springs located between two pairs of levers. One pair of levers has hinge joint with central rod, centrifugal weights and rollers, the other pair has hinge joint with head and with first levers, double-layer friction conical clutch. Disc cam is made fast to conical tail part in fixed joint of motor. Spindle has conical surface conjugate to embracing ring of double-layer friction conical clutch and conical surface of body is conjugate to embracing ring of same clutch. EFFECT: prolonged service life of electric motor of mechanism. 3 dwg