Traction and suspension system
The device has an electrical traction machine ( 20 ) suspended to a body of a hybrid or electric motorization vehicle and providing engine torque (CM) applied to rear wheels ( 3, 4 ). A mechanical link is provided between the machine and a deformable crossmember ( 2 ) to transmit torque effect (CR) with the engine torque to the crossmember for descending the rear wheels with respect to the body of the vehicle and for creating anti-squat effect during acceleration in electric propulsion of the vehicle. The link is provided with a connection shaft ( 30 ) connected to two levers ( 21, 33 ).
1. 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,
comprising:
two rotary electric motors, 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 and a rotor; wherein
the two rotors
are coupled to the propulsive element for transferring to it rotary motion through a transmission shaft, and
have a common rotation axis which is fixed relative to the vehicle's frame; and
the stators are
controllable to rotate about the respective rotor independently of each other, and
rigidly connected substantially to a same point, external to the motors, on which there can be exerted a thrust determined by a coordinated angular displacement of the stators about the respective rotors;
a transmission for transmitting the thrust generated on said point to the propulsive element,
wherein said shaft comprises at least two segments connected together by an articulation joint.
2. System according to claim 1 , wherein the transmission is structured so that the thrust generates a displacement of said point.
3. System according to claim 2 , wherein the transmission for transmitting the thrust is structured to reverse the direction of the thrust generated on said point to direct it towards the propulsive element.
4. System according to claim 3 , wherein the transmission comprises
a lever pivoted on the frame,
the lever comprising an application point for said generated thrust and a force transmission point towards the propulsive element so that when the generated thrust moves the application point the lever moves the force transmission point.
5. System according to claim 4 , wherein the lever comprises an oscillation axis which is fixed relative to the frame.
6. System as claimed in claim 5 , wherein the lever's oscillation axis is intermediate to said application point for said generated thrust and to said force transmission point towards the propulsion element.
7. System according to claim 6 , wherein the lever is connected to the stators of the two rotary electric motors via two respective rigid arms, wherein each rigid arm has a point or end respectively connected to one of a said stators and a point or end connected to the lever.
8. System according to claim 6 , wherein the propulsive element is connected to the lever by means of a rigid arm.
9. System according to claim 5 , wherein the lever is connected to the stators of the two rotary electric motors via two respective rigid arms, wherein each rigid arm has a point or end respectively connected to one of a said stators and a point or end connected to the lever.
10. System according to claim 5 , wherein the propulsive element is connected to the lever by means of a rigid arm.
11. System according to claim 4 , wherein the lever is connected to the stators of the two rotary electric motors via two respective rigid arms, wherein each rigid arm has a point or end respectively connected to one of a said stators and a point or end connected to the lever.
12. System according to claim 11 , wherein the propulsive element is connected to the lever by means of a rigid arm.
13. System according to claim 4 , wherein the propulsive element is connected to the lever by means of a rigid arm.
14. System according to claim 1 , wherein the transmission is structured so that the thrust generates a displacement of said point.