Inner rotor cylinder shaft hub motor

The invention provides an inner rotor cylinder shaft hub motor, which comprises an end cover assembly, a machine core assembly and a hub assembly, and is characterized in that the machine core assembly is arranged in a working cavity between the end cover assembly and the hub assembly; the movement assembly comprises a cylinder shaft, a duplex planetary gear, a planetary support, a sun gear, a rotor, a stator coil assembly and a sheath. One end of the cylinder shaft penetrates through the hub assembly and is connected with an external frame. The cylinder shaft is fixedly connected with the inner side of the sheath, the sheath and the planetary support are installed on the two sides of the stator coil assembly respectively, and the duplex planetary gear is installed on the planetary support. The sun gear is arranged outside the cylinder shaft, the rotor is fixedly installed outside one end of the sun gear, and the gear end of the sun gear is connected with an inner gear ring of the end cover assembly through t