Dual-power motor externally-hung marine gearbox

The invention discloses a dual-power motor externally-hung marine gearbox which comprises a diesel engine, a motor and a gearbox body, the motor serves as the main power input of the gearbox body, the diesel engine serves as the auxiliary power input of the gearbox body, and the power of the motor is larger than that of the diesel engine; the motor is arranged outside the gearbox, and an output shaft of the motor is in running fit with a motor input shaft in the gearbox through a coupler. The invention provides a dual-power motor externally-hung marine gearbox, and aims to solve the problem that an existing dual-power marine gearbox can only use a diesel engine as main power input or the power of a motor is too small. The high-power motor serves as the main power input of the marine gearbox, silent high-speed traveling is achieved, meanwhile, the diesel engine can be automatically started quickly under the condition that the motor trips, the ship capsizing accident is effectively avoided, and the sailing safe