Suspension and traction system for a vehicle equipped with a frame and a propulsive element through rolling on the ground adapted to move the vehicle relative to the ground, the system comprising: - two rotary electric motors (12, 14), which are mounted to impart in the same direction an angular torque to the propulsive element in order to propel the vehicle on the ground, are controllable independently of each other and each comprise a stator (12s, 14s) and a rotor (12r, 14r); - a transmission shaft, wherein the two rotors (12r, 14r) are couplable to the propulsive element for transferring to it rotary motion through the transmission shaft, and have a common rotation axis which is fixable relative to the vehicle's frame; and the stators (12s, 14s) are controllable to rotate about the respective rotor independently of each other, and rigidly connected substantially to a same point, external to the motors (12, 14), movable about the common rotation axis of the rotors (12r, 14r), so that by the coordinated angular displacement of the stators (12s, 14s) about the respective rotors (12r, 14r) a thrust can be exerted on said same point to vary the distance between said point and the propulsive element; - a transmission for transmitting the thrust generated on said point to the propulsive element; characterized in that the transmission shaft comprises at least two segments connected together by an articulation joint. a propulsive element through rolling on the ground adapted to move the vehicle relative to the ground, the system comprising: - two rotary electric motors (12, 14), which are mounted to impart in the same direction an angular torque to the propulsive element in order to propel the vehicle on the ground, are controllable independently of each other and each comprise a stator (12s, 14s) and a rotor (12r, 14r); - a transmission shaft, wherein the two rotors (12r, 14r) are couplable to the propulsive element for transferring to it rotary motion through the transmission shaft, and have a common rotation axis which is fixable relative to the vehicle's frame; and the stators (12s, 14s) are controllable to rotate about the respective rotor independently of each other, and rigidly connected substantially to a same point, external to the motors (12, 14), movable about the common rotation axis of the rotors (12r, 14r), so that by the coordinated angular displacement of the stators (12s, 14s) about the respective rotors (12r, 14r) a thrust can be exerted on said same point to vary the distance between said point and the propulsive element; - a transmission for transmitting the thrust generated on said point to the propulsive element; - two rotary electric motors (12, 14), which are mounted to impart in the same direction an angular torque to the propulsive element in order to propel the vehicle on the ground, are controllable independently of each other and each comprise a stator (12s, 14s) and a rotor (12r, 14r); are mounted to impart in the same direction an angular torque to the propulsive element in order to propel the vehicle on the ground, are controllable independently of each other and each comprise a stator (12s, 14s) and a rotor (12r, 14r); - a transmission shaft, wherein the two rotors (12r, 14r) are couplable to the propulsive element for transferring to it rotary motion through the transmission shaft, and have a common rotation axis which is fixable relative to the vehicle's frame; and the stators (12s, 14s) are controllable to rotate about the respective rotor independently of each other, and rigidly connected substantially to a same point, external to the motors (12, 14), movable about the common rotation axis of the rotors (12r, 14r), so that by the coordinated angular displacement of the stators (12s, 14s) about the respective rotors (12r, 14r) a thrust can be exerted on said same point to vary the distance between said point and the propulsive element; the two rotors (12r, 14r) are couplable to the propulsive element for transferring to it rotary motion through the transmission shaft, and have a common rotation axis which is fixable relative to the vehicle's frame; and are couplable to the propulsive element for transferring to it rotary motion through the transmission shaft, and have a common rotation axis which is fixable relative to the vehicle's frame; and the stators (12s, 14s) are controllable to rotate about the respective rotor independently of each other, and rigidly connected substantially to a same point, external to the motors (12, 14), movable about the common rotation axis of the rotors (12r, 14r), so that by the coordinated angular displacement of the stators (12s, 14s) about the respective rotors (12r, 14r) a thrust can be exerted on said same point to vary the distance between said point and the propulsive element; controllable to rotate about the respective rotor independently of each other, and rigidly connected substantially to a same point, external to the motors (12, 14), movable about the common rotation axis of the rotors (12r, 14r), so that by the coordinated angular displacement of the stators (12s, 14s) about the respective rotors (12r, 14r) a thrust can be exerted on said same point to vary the distance between said point and the propulsive element; - a transmission for transmitting the thrust generated on said point to the propulsive element; characterized in that the transmission shaft comprises at least two segments connected together by an articulation joint.