Electric motor with integral gearbox

An electric motor with an integral gearbox, the electric motor comprising:

• a stator provided with a first member disposed on an inner circumferential surface of an enclosure to generate an electromagnetic force;
• a rotor provided with a second member disposed on an outer circumferential surface to face an inner circumferential surface of the stator to generate the electromagnetic force together with the first member;
• a gear assembly provided inside the rotor and configured to be shiftable;
• and
• a control unit that controls the gear assembly,
• wherein a gear tooth coupled to a gear plate provided in the gear assembly is disposed inside the rotor, and
• the gear assembly is configured to transmit power to an output shaft as the rotor rotates, and
• wherein the gear assembly includes one or more gear plates that rotate as the rotor rotates;
• a connecting gear disposed to be selectively coupled to any one of the one or more gear plates;
• a moving part that moves the connecting gear in an axial direction;
• and
• an output shaft that rotates together as the connecting gear rotates to transmit a rotating force to a load, and
• wherein the control unit moves the moving part according to a shift signal to allow the connection gear to be coupled to or decoupled from any one of the one or more gear plates to control the output shaft.