Abstract: The invention is directed to a freewheel mechanism comprising: a) an input shaft, which rotates at an input speed; b) an output shaft, which rotates at an output speed; c) a first differential-gear or planetary-gear system, which is arranged between the two shafts and comprises at least one toothed orbital or planetary gear, which is rotatably mounted in a first orbital-gear or planetary-gear carrier and meshes with two internal toothed rings on two further rotary connections of the first differential-gear or planetary-gear system, the speeds thereof determining the speed of the first orbital-gear or planetary-gear carrier in the first differential-gear or planetary-gear system; d) a second differential-gear or planetary-gear system, which comprises at least one toothed orbital or planetary gear, which is rotatably mounted in a second orbital-gear or planetary-gear carrier and meshes with two internal toothed rings on two further rotary connections of the second differential-gear or planetary-gear system, the