High-efficiency heavy-load rear axle of electrically-driven crawler

The invention belongs to the technical field of electric driving equipment, and discloses a high-efficiency heavy-load rear axle of an electrically-driven crawler. The high-efficiency heavy-load rearaxle comprises driving devices which are symmetrically arranged, each driving device comprises a direct-current motor and a speed reducer matched with the direct-current motor; a power output disc inthe speed reducer is connected with the power half shaft through a half shaft spline; the symmetrically arranged power half shafts are connected through a drive axle connecting part; the symmetrical speed reducers are connected through a drive axle connecting part to form an integrated structure; the drive axle connecting part is supported on a longitudinal beam in the middle of the chassis through a connecting part fixing piece. The power output end of the power half shaft penetrates through a drive axle tube and then is connected with a disc brake disc; the disc brake disc and a crawler beltdriving disc synchronously