Disks e of friction clutch 5 rotate together with carrier H, sliding along its axis. Disk d is rigidly attached to the clutch housing, and disk c is keyed to shaft b. Gear 4 is keyed to shaft b and meshes with planet gears 3 which are connected by a turning pair to carrier H. Intermediate gear 2 is connected by a turning pair to carrier H and meshes with planet gears 3 and with sun gear 1 which is keyed to shaft a. When clutch 5 is shifted to the right, shafts a and b rotate at the same speed in the same direction. When clutch 5 is shifted to the left, shafts a and b rotate in opposite directions with the transmission ratio i_ab=-z₄/z₁ where z₁ and z₄ are the numbers of teeth of gears 1 and 4. When clutch 5 is in its neutral position (as shown) and a resistance torque is applied to shaft b, this shaft is stationary and planet gears 3 roll around stationary gear 4.
$2962$CxG,C$