Patent ID: 8240776

Claim:
A continuous mining machine comprising a main frame ( 3 ) supported on propulsion crawlers ( 6 ); a yoke assembly ( 4 ) pivotally attached to a front end of the main frame; a cutter boom ( 1 ) having cutting drums ( 29 ) attached at a first end of the cutter boom and the yoke assembly attached to a second end of the cutter boom; swing cylinders ( 5 ) attached to the main frame ( 3 ) and to the yoke assembly ( 4 ); cutter boom lift cylinders ( 14 ) attached to the yoke assembly ( 4 ) and the cutter boom ( 1 ); a gathering conveyor ( 2 ) attached to the yoke assembly ( 4 ); gathering conveyor lift cylinders ( 15 ) attached to the yoke assembly ( 4 ) and the gathering conveyor ( 2 ); wherein the cutter boom ( 1 ) and gathering conveyor ( 2 ) can be raised or lowered independently via respective lift cylinders while simultaneously able to articulate left or right via connection to the yoke assembly and actuation of swing cylinders ( 15 ); a single first input gear/shaft ( 18 ) driven by two independent electric motors ( 16 ) at each of the respective ends of the first input gear/shaft ( 18 ), said first input gear/shaft ( 18 ), is coupled to a second gear ( 19 ), said second gear ( 19 ) is splined onto a third shaft/gear ( 20 ), said third shaft/gear ( 20 ) is coupled to a fourth gear ( 21 ), said fourth gear ( 21 ) is splined onto fifth shaft ( 22 ), said fifth shaft ( 22 ) is coupled to sixth gear ( 23 ), said sixth gear ( 23 ) is coupled to idler gear ( 24 ), said idler gear ( 24 ) is coupled to output gear ( 25 ), said output gear ( 25 ) is splined onto cutter drum shaft ( 26 ), ends of said cutter drum shaft ( 26 ) are splined onto hubs ( 27 ), said hubs ( 27 ) are rotatably fixed to cutting drums ( 29 ) utilizing keys ( 28 ).