PROCESS OF EXTRACTION OF CUTTING BIT HOLDER, AID AND TOOL FOR ITS IMPLEMENTATION Russian patent published in 2000 - IPC

FIELD: mining industry. SUBSTANCE: proposed process and tools can be used in mining combines. Process of extraction of cutting bit holder from cam of cutting chain of drum of mining combine of continuous action includes execution of internal rotary fixing formation in hole of cutting bit holder, execution of additional rotary fixing formation on rod of tool for extraction, insertion of additional rotary fixing formations for mutual engagement between cutting bit holder and tool for extraction by relative rotation and application of extraction force to cutting bit holder via rod and via rotary fixing formations made in the form of screw thread being in engagement. Their mutual engagement is carried out by way of screwing on. Aid for extraction of holder from cam of cutting chain of drum of mining combine of continuous action includes internal rotary fixing formation in hole of cutting bit holder and additional external rotary fixing formation on rod of extraction mechanism. Rod is put into hole of cutting bit holder. Additional rotary fixing formations are made for possible engagement by way of their relative rotation for application of extraction force to cutting bit holder via tool for extraction and via rotary fixing formations being in mutual engagement, in operation, made in the form of screw thread and screwed on together. Tool for extraction of cutting bit holder has internal rotary fixing formation in its hole, rod, external rotary fixing formation near one end of rod and engagement aid for application of extraction force to rod near opposite end of rod. EFFECT: reduced break-down of equipment, simplified design of aid and tool and diminished wear of equipment. 11 cl, 2 dwg