| 摘要 |
The motor-vehicle is provided with side tracks (C1-C2) with respective electric motors (11-111) which actuate speed reducers (17-117) pivoted with their input shafts (16) on the inner side of said tracks and having keyed on their output shafts respective rubber-coated wheels (18-118) and respective pinions (19-119). The reducers are associated with raising/lowering units (22-122) which, when the motor-vehicle travels on its tracks, keep the rubber-coated wheels lifted from the ground and cause said pinions to mesh with ring gears (20-220) which are keyed to one of the wheels (3) for said tracks which are thus connected to the propelling motors. On the contrary, when the vehicle travels on its wheels, the reducers are lowered to cause the rubber-coated wheels to engage the ground and the tracks are kept in a lifted condition, with simultaneous disengagement of the pinions from the ring gears for said tracks. Provided at the front side of the motor-vehicle is at least one steering wheel (28) which can be raised/lowered simultaneously with the rear wheels and which is provided on its shaft with a potentiometer permitting an accurate control of the motors during the steering of the motor-vehicle. <IMAGE> |
