Electromechanical coupling transmission device of crawler

The invention relates to an electromechanical coupling transmission device of a crawler. The device comprises an engine, a power coupling and gear shifting mechanism, two motors, a power control unit and an energy storage system, wherein the two motors are connected with sun gears of two planet rows of the power coupling and gear shifting mechanism respectively, a gear ring of the two planet rowsof the power coupling and gear shifting mechanism is shared, a clutch is arranged between the two sun gears and the shared gear ring, and the shared gear ring is provided with a brake and output through a planet carrier. The transmission device removes a steering gear set and a zero shaft of double-flow transmission of the crawler, and has flexible allocation, capability of making full use of space and compact structure. Because of the power coupling and gear shifting mechanism, the requirement for the motors is reduced, and the research and manufacture risks of the motors are reduced.