| 摘要 |
A mobile carrier frame 1 for supporting bulk material handling equipment has an elongate chassis 2. A front wheel assembly 3 is mounted at a front end of the chassis 2. A rear wheel assembly 4 is mounted at a rear end of the chassis 2. Wheels of the front wheel assembly 3 and rear wheel assembly 4 are movable between a standard travel mode for longitudinal movement of the chassis 2 and a parallel travel mode for sideways movement of the chassis 2. Independent drive means is provided for the front wheel assembly 3 and the rear wheel assembly 4. A speed differential limiter is operable to limit the speed variation between the front wheels and the rear wheels to a maximum of 10% when the front wheel drive means and rear wheel drive means are operating together in the parallel travel mode. |
