OPERATING ELEMENT OF MINING MACHINE FOR COAL EXTRACTION IN FORMATIONS WITH HARD INCLUSIONS Russian patent published in 2012 - IPC E21C27/24 

FIELD: mining.

SUBSTANCE: The invention relates to mining, in particular, to design of operating element of a mining machine. The operating element of mining machine for coal extraction in formations with hard inclusions comprises a revolving gear and a cutting section installed on rotatable output gear shaft. A power transmission which rotates the output gear shaft of this revolving gear is installed inside the frame of revolving gear. The cutting section receives power pulses from unbalanced vibrator positioned inside of it. The cutting section is kinematically connected by coaxially positioned outer and inner torsion bars with output gear shaft and unbalanced vibrator respectively. The unbalanced vibrator is actuated through inner torsion bar. There is an additional transmission installed inside the frame of the revolving gear, which is positioned in parallel with the power transmission or the output gear shaft. This additional transmission rotates the inner torsion bar relaying the rotation to the unbalanced vibrator.

EFFECT: reduced size of operating element while retaining efficiency of extracting thin coal layers with hard inclusions.

5 cl, 4 dwg