Patent ID: 7217226

Claim:
An electric motor assembly, comprising: an electric motor including a shaft rotatably mounted about an axis of the electric motor and extending axially from the electric motor to transfer torque from the electric motor, at least a portion of the shaft being tapered as the shaft extends from the electric motor to an outer end of the shaft, the outer end of the shaft being configured to receive a securing member, and a flywheel assembly defining a bore extending axially through a center of the flywheel assembly, at least a portion of the bore being tapered as the bore extends axially from an inner periphery facing the electric motor to the outer periphery of the flywheel assembly, wherein the flywheel assembly includes a flywheel, a radial fan with a plurality of radial blades, and a pulley; wherein tie shaft of the electric motor extends through the bore of the flywheel assembly such that the taper of the shaft and the bore center the flywheel assembly on the shaft and create a self-holding taper arrangement, and wherein the securing member is secured onto the outer end of the shaft.