Full-hydraulic underground crawler-type crane

The invention discloses a full-hydraulic underground crawler-type crane and belongs to the technical field of underground mine carrying equipment. The technical problem to be solved by the invention is to provide an underground mine lifting device which is less in space constraint, low requirement on the top of a roadway, high in safety, high in working efficiency and low in labor intensity of workers. The technical scheme adopted by the invention is as follows: a lifting mechanism, a rack and a travelling mechanism are sequentially arranged from top to bottom in a vertical direction, wherein both the lifting mechanism and the travelling mechanism comprise motors and speed reducers; the lifting mechanism comprises a large lifting arm, an amplitude regulating oil cylinder, a small lifting arm, a steel wire rope, a rope regulating winch, a counter weight and a hydraulic medium converting device; the rope regulating winch, the counter weight and the hydraulic medium converting device are mounted at the top of th