Abstract In this paper, the content is about the design of walking mechanism , the whole of the hydraulic system ,the whole of layout and the parameter of the EBJ-120TP roadheader. The EBJ-120TP roadheader isone of cantilever part face of total power is225 cutting power is 120kw. The laneway of part face that it can be working is9~18 2m , the slope is??16 . It can incise the one way of anti- presses coal . It belong to medium-sized cantilever roadheader. The main characteristics of that machine is:Structure tightly packed good adaptability ,short fuselage,low center, simple operates, more convenient check. The EBJ-120TP roadheader uses crawler-type walking mechanism. The speed is3 m/min. Right crawler-type walking mechanism is symmetrical with left. They are driven separately, Which link to framework by10 high strength bolts with horizontal and vertical ra
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