FIELD: mining.
SUBSTANCE: invention refers to mechanisms of percussion action for destructing rocks and artificial surfaces. Mechanism contains case, drive shaft arranged in the case, where crank is secured to the drive shaft and kinematically tied with contrivance including tool, slider, connecting rod, rocking arm, socket sleeve, hydro-cylinder with rod and spring secured in the cylinder case; the said case has stops for the spring; also two journals are welded on the cylinder case; by means of these journals the hydro-cylinder is pivotally connected with the case; also the upper end of the rocking arm is pivotally connected with the connecting rod which in its turn is pivotally connected to the slider. The mechanism contains supporting pin; additionally the case is movable relative to the supporting pin by means of carriage made in form of steel forged piece with lugs and a threaded aperture wherein a guide with supporting pin is installed; the guide is rigidly tied to a lever of an excavator by means of fingers, while it is movably tied with the case mounted at the lug of the excavator hydro-cylinder; a lower portion of the rocking arm is made in form of fork consisting of two parallel cheeks; the cheeks in their lower portion are pivotally connected with bushings through two axes; the bushings are welded to side walls of the case; in the middle of the fork there is installed an axis whereon cartridge is pivotally installed; from the exterior side of the rocking arm two cheeks of the rocking arm are arranged; they are rigidly secured with the rod with two stops by means of which they compress the spring; the crank has a groove in form of a slanting shear at 15 degrees angle to the line of orientation of the crank relative to the rocking arm in its main position at the extreme upper point; the geometrical dimensions of the crank and the rocking arm are determined from concentricity of the crank (e).
EFFECT: increased power of mechanisms of percussion action for destructing rocks and artificial surfaces.
2 cl, 5 dwg
