FIELD: mining industry.
SUBSTANCE: device has body with external and internal stepped surfaces and axial ring-shaped supports, for, respectively, rotor and for stepped inserts coupled by links, made on upper end with side tracks and stopping clamps, supporting slanting surfaces for wedges with dies, socket for hoisting hook and drive, localizer, leading pipe clamp and crosspiece for chisels. Each axial ring-shaped support of inserts is positioned above ring-shaped support of body, upper end of body is made with faceted aperture for crosspiece for chisels and with grooves for responding shelves of inserts, made on upper step of the latter. Inserts are made with inner cone, positioned between their supporting planes and sharing slanting angle with it, no less than 1:6.
EFFECT: higher reliability, higher personnel safety, higher serviceability.
5 cl, 13 dwg
