Patent ID: 8104375

Claim:
Differential gear unit for motor vehicles, comprising a housing and, therein, a differential gear mechanism, two coaxial gear mechanisms and two controllable friction clutches, the differential gear mechanism comprising an element which can be driven and a first and second output element for outputting torque, and the coaxial gear mechanisms transmitting an additional torque to the first and second output elements according to the degree of engagement of the friction clutches, wherein a) each coaxial gear mechanism comprises one first element which is configured as an internal gear and is connected fixedly in terms of rotation to one side of the associated friction clutch, and one second element which is connected fixedly in terms of rotation to the respective output element, and b) the second element of each coaxial gear mechanism is a sun gear, and a third element is configured as an annular gear having an axis of rotation which is offset with regard to an axis of rotation of each of the first and the second elements, and which has an external toothing system which meshes with the first element and an internal toothing system which meshes with the second element; and wherein each friction clutch comprises a primary part which carries inner disks and a secondary part which carries outer disks, wherein the secondary part is combined structurally with the first element of the respective coaxial gear mechanism.