A vehicle driving apparatus includes: an electric motor including a rotor provided movably in an axial direction relative to a rotor shaft and a stator disposed on an outside of the rotor in a radial direction; a first gear provided movably in the axial direction relative to the rotor shaft and disposed so as to face an end face of the rotor; a power transmission path including a second gear engaged with the first gear and coupling the first gear and wheels to each other; and an actuator that moves the rotor to a first position and a second position. The rotor is moved to the second position by the actuator. The first gear is urged in the axial direction due to a magnetic force applied between the rotor and the first gear. A tooth surface of the first gear is pushed against a tooth surface of the second gear.

A motor and a cleaner comprising the same. The motor comprises a stator including a stator core; a rotating shaft arrangeable inside the stator; a rotor rotatable about the rotating shaft by electromagnetically interacting with the stator while the rotating shaft is arranged inside the stator; a housing to accommodate the stator and the rotor; and a bearing coupleable to the housing such that while the bearing is coupled to the housing, the bearing allows the stator and the rotor to be stably coupled to each other. While the stator and the rotor are accommodated in the housing, a center of the stator core and a center of the rotor along an extension direction of the rotating shaft is arranged at different positions from each other with respect to the extension direction of the rotating shaft.

A rotor has at least one first rotor body with a first group of permanent magnets and a second rotor body with a second group of permanent magnets. The first and the second rotor bodies are rotated relative to each other about a common rotational axis against the effect of a first torsional stiffness by a mechanical field-attenuation mechanism. The field-attenuation mechanism includes a lever element. The first rotor body is coupled to a first lever section, and the second rotor body is coupled to a second lever section of the lever element. The first and second lever sections are arranged on opposite sides of the lever such that by tilting the lever element, the first and the second rotor bodies are rotated relative to each other in a targeted manner to produce a desired adjustment of the mechanical field-attenuation mechanism.