Patent ID: 9649923
Date: 2017-05-16
CPC Classifications: B60G,B60K,B60L,B62D,Y02T

Claim:
1. An electric-propulsion vehicle, comprising: a motor-driven front axle assembly; and a motor-driven rear axle assembly; wherein said assemblies both comprise: a supporting frame, two wheel-suspension units, an electric motor for driving the wheels in rotation, a control unit for controlling said motor, a differential transmission unit with one or more gear ratios, and a steering device for regulating the angular position of the wheel supports of said suspension units with respect to said frame; said motor, said transmission unit, said suspension units, and said steering device being mounted on said supporting frame; wherein said suspension units are of the articulated-quadrilateral type with oscillating bottom arm and top arm, and comprise a shock-absorber device that engages, at the bottom, said bottom arm and, at the top, said supporting frame or else the frame of the motor vehicle on which the passenger compartment thereof is obtained, and in that, in each axle assembly, said suspension units and said steering device are integrated on said supporting frame so as to determine within said assembly the kinematic chain, and the geometrical configuration of said chain, that are designed to define the position and the orientation of the wheel support with respect to the frame of said motor vehicle, in such a way that said axle assembly constitutes a pre-assembled module removably mounted on said frame of said motor vehicle.