Patent ID: 9381970
Filing Date: 2016-07-05
CPC Classification: B60K,B60L,B62K,B62M,Y02T

Claim Text:
1. An electric propulsion unit and torque transmission group for operating a rear wheel of an electric scooter with a step-through body and with an upright sitting portion, said electric propulsion unit comprising: at least one synchronous electric motor, wherein said synchronous electric motor comprises an internal stator and an external rotor with a cup-shaped form rotating on a fixed shaft rigidly connected to the stator, the motor being designed to be installed in a barycentric position with respect to the scooter substantially at the base of the upright sitting portion with the fixed shaft transverse to the longitudinal axis of the scooter, and said transmission group comprising at least one first and one second reduction stage formed with a belt-and-pulley transmission, said transmission group further comprising a support sliding in said casing for an intermediate shaft inserted between said first and second reduction stages, so as to allow relative tensioning of the transmission belts.