TOWING TROLLEY FOR MINING DRAWKNIFE Russian patent published in 2012 - IPC E21C27/34 

FIELD: mining.

SUBSTANCE: invention refers to mining industry, and namely to towing trolley for underground mining drawknife. Towing trolley for underground mining drawknife includes a towing trolley body inserted in the drawknife body cavity, which is provided on rear side of the cavity guide with a connection element to fix the drawknife chain, and on front side of the cavity guide - with front part, the ends of which indicate the movement direction and form thrust surfaces to interact with counter-thrust surfaces in the drawknife body cavity; at that, a damping device is integrated into the front part of towing trolley and acts with damping in both movement directions. Connection element is movable relative to thrust surfaces with overcoming of back force of damping system of damping device, which is located between thrust surfaces. The provision is made for a receiving body that is rigidly connected to the connection element to receive the damping system. Thrust surfaces form ends of movable bushing, in inner space of which the receiving body is located in movable manner; at that, inner sides of thrust surfaces preferably form thrusts for relative movement between movable bushing and receiving body.

EFFECT: increasing the device efficiency.

16 cl, 12 dwg