Patent ID: 8109175

Claim:
A transmission between a drive element ( 22 ) and wheels ( 2 A, 2 B) of a self-propelled tractor vehicle, comprising: housed at least partially inside a box ( 40 ), a drive shaft ( 1 ) of the wheels and a progressive friction clutch that comprises at least one rotary driving element ( 30 ) and two driven elements ( 5 A, 5 B) that are carried by the drive shaft ( 1 ) and are integral in rotation with the drive shaft, whereby said at least one driving element ( 30 ) and said driven elements ( 5 A, 5 B) are, under the action of an input control element ( 20 ), brought into variable-tightening support contact to obtain a variation of the torque that is transmitted to the shaft ( 1 ), wherein the drive shaft ( 1 ) is formed by two half-shafts ( 1 A, 1 B) that are mounted to rotate freely relative to one another, and are each able to be connected, directly or indirectly, to one of the wheels ( 2 A, 2 B) of the vehicle to be driven, whereby each of the driven elements ( 5 A, 5 B) is carried by one of the two half-shafts ( 1 A, 1 B).