Lift truck 2 has plat forms 3, 4 and 5 which are shown in the raised position to the right of axis y-y, and in the lowered position to the left of this axis. The plat forms can be raised and lowered with translational motion along axis y-y. The plat forms are raised by flexible links 6 and 7, attached to drive pulley 1 which rotates about axis A of truck 2. Flexible links 6 and 7 run over identical pulleys a, d, b, f and e, and are attached to the top platform at points D. Pulleys a rotate about axes K and L of the truck. When pulley 1 rotates clockwise, the plat forms are raised along axis y-y. Here flexible link 6 moves in the direction of arrow k as shown in the right-hand drawing. The plat forms are lowered by gravity and the action of flexible link 8 (shown at the right by dash lines) which runs over pulleys a₁, d, d₁, f and f₁, and is attached at point D. Link 8 moves In the direction of arrow m, being wound on a separate pulley which rotates counterclockwise.
$3557$CFL,MH$