Propulsion wheel motor for an electric vehicle

摘要

A wheel assembly for an electric vehicle includes a wheel rim that is concentrically disposed about a central axis. A propulsion-braking module is disposed within an interior region of the wheel rim. The propulsion-braking module rotatably supports the wheel rim for rotation about the central axis. The propulsion-braking module includes a liquid cooled electric motor having a rotor rotatable about the central axis, and a stator disposed radially inside the rotor relative to the central axis. A motor-wheel interface hub is fixedly attached to the wheel rim, and is directly attached to the rotor for rotation with the rotor. The motor-wheel interface hub directly transmits torque from the electric motor to the wheel rim at a 1:1 ratio. The propulsion-braking module includes a drum brake system having an electric motor that rotates a cam device, which actuates the brake shoes.

主权项

1. A wheel assembly for an electric vehicle, the wheel assembly comprising:
a wheel rim concentrically disposed about a central axis and extending along the central axis to define an interior region; and a propulsion-braking module disposed within the interior region of the wheel rim, and rotatably supporting the wheel rim for rotation about the central axis, the propulsion-braking module including:
an electric motor having a rotor rotatable about the central axis, and a stator disposed radially inside the rotor relative to the central axis;a motor-wheel interface hub fixedly attached to the wheel rim for rotation with the wheel rim, and directly attached to the rotor for rotation with the rotor, and operable to directly transmit torque from the electric motor to the wheel rim at a 1:1 ratio;an inner water jacket housing disposed radially inside the stator relative to the central axis, and operable to circulate a cooling liquid circumferentially about an outer radial surface of the inner water jacket housing, between the outer radial surface of the inner water jacket housing and an inner radial surface of the stator;a vehicle interface adapter attached to the stator and disposed concentrically about the central axis; anda rotor clamp attached to the motor-wheel interface hub for rotation therewith, and for securing the rotor between the motor-wheel interface hub and the rotor clamp, and radially supporting the vehicle interface adapter relative to the central axis.