| 摘要 |
A vehicle four-wheel drive system 10, particularly for allowing skid-steer control of a robot, drives axles 12, 14 each comprising two coaxial axle shafts 12a, 12b, 14a, 14b, each axle shaft carrying a wheel 13a, 13b, 15a, 15b. A pair of diagonally opposite axle shafts 12a, 14b are driven by drive means 16a, 17b, preferably electric motors driving the shafts through gearboxes 16b, 17b. Drive transmissions 18, 19, 20, 21, longitudinally transmit drive from axle shafts 12a, 14b to axle shafts 12b, 14a on the same side of the vehicle; preferably a belt-and-pulley system uses V-belts or cogged belts 18, 19 and pulleys 20, 21. Wheels 13a, 14b may be smooth and wheels 13b, 14a studded or treaded, and traction may also be provided by belts 18, 19. Motors (36, Figure 3) may alternatively be provided for each axle shaft (33, Figure 3). |
