Patent ID: 7955208

Claim:
A torque distributing apparatus comprising a differential gear unit transmitting an input torque to first and second output shafts while allowing a differential rotation between the first and second output shafts, a planetary gear set arranged between the first and second output shafts, a motor driving the planetary gear set, and a speed change gear set compensating a speed change ratio of the planetary gear set, wherein: the planetary gear set is arranged coaxially outward of the first output shaft, and has a plurality of planetary gears, a planetary carrier carrying the planetary gears revolvably and rotatably, a first gear engaging with the planetary gears and a second gear engaging with the planetary gears, wherein the planetary carrier is an input element of a torque of the motor; the speed change gear set is arranged coaxially outward of the first output shaft, and has a plurality of planetary gears, a planetary carrier carrying the planetary gears rotatably, a third gear engaging with the planetary gears and a fourth gear engaging with the planetary gears, wherein the planetary carrier is fixed to a nonrotatable portion; the first gear of the planetary gear set is integrated with the third gear of the speed change gear set; one of the second gear and the fourth gear is connected with the first output shaft for no relative rotation, and the other is connected with the differential gear unit; and the motor is arranged outward of the planetary gear set and the speed change gear set and is coaxial with the planetary gear set and the speed change gear set, wherein the speed change gear set is arranged axially between the planetary gear set and the differential gear unit, and wherein the fourth gear directly drives a member of the differential gear unit.