DIFFERENTIEL COMPORTANT UN BOITIER POUVANT ETRE ENTRAINE ET DES PLANETAIRES COAXIAUX DE DIFFERENTS DIAMETRES

PURPOSE: To reduce the size of the whole of a differential unit and to reduce the cost by connecting two driving gears to each other through a number of differential gears parallel to the axis, and holding the differential gears in the individual friction pockets in a differential gear case. CONSTITUTION: A differential gear 3 meshes with a driving pinion 1, and a differential gear 4 meshes with a driving gear wheel 2, and the differential gears 3, 4 are positioned in the respective friction pockets 5, 6. A differential gear case 7 is built up from two split cases 8, 9 by a screw 10, the driving pinion 1 is stored in the split case 8 and a driving gear wheel 2 is stored in the split case 9. Since the differential gears 3, 4 are directly connected to the driving gears 1, 2, a number of differential gears 3, 4 can be arranged in the circumferential direction so that the outside diameter of the unit can be reduced. Further, the differential gears 3, 4 are positioned parallel to the axis, whereby two driving gears 1, 2 can be made close to each other so as to reduce the full length of the unit.