| 摘要 |
<p>Mobile vehicles, such as lift trucks, are normally mounted on pairs of front and rear wheels for locomotion purposes. The rear wheels are steerable to move the truck into various work positions. However, the turning radius and maneuverability of vehicles of this type are limited, particularly when working in narrow aisles. The vehicle (10) of the present invention includes a frame assembly (13), a plurality of wheels (72, 74) mounted on the frame assembly (13) for universal movement about a pivot point (110), and a support and drive system (70) for driving the wheels (72, 74) and for infinitely positioning the wheels (72, 74) relative to a supporting surface (11) to move the vehicle (10) in any chosen direction.</p> |
