| 摘要 |
<p>A forklift truck comprises two driven front wheels 12L, 12R and a single driven central rear wheel 14. The truck is operable in a sideways mode (FIGS. 2A-2C) in which the rear wheel is fixed at an angle substantially parallel to an axis passing through the two front wheels and the two front wheels are steered in synchronism in opposite directions of rotation. The truck is further operable in a rotational mode in which the center of rotation C of the truck is disposed inside a notional circle 200 passing through all three wheels. The truck enters the rotational mode from the sideways mode by automatic reversal of the drive direction of the rear wheel, by actuating a changeover valve 40, when the center of rotation moves from outside to inside the notional circle.</p> |
