HUB DRIVE STRUCTURE

A hub drive structure includes an electric machine set (20), a gear set (300), an outer rotor input set (60), and a hub mounted on a hub shaft (10). The electric machine set (20) includes an internal hood (21) that is fixed through a shaft tube arm (22) to the hub shaft (10), so that when a motor is supplied with electrical power to operate a rotor (27) to drive the hub (70), a firm and sound supporting force is obtained to effectively increase the initial driving force of the hub (70) and thus reduce unnecessary kinetic loss, and further, the rotor (27) of the electric machine set (20) and the gear set (300) are coaxially mounted on an output sleeve (28) of the electric machine set (20) to effectively ensure concentricity of the gear set (300) to thereby improve the operation stability thereof and reduce the phenomenon of jitter noise.