| 摘要 |
A vehicle for leisure or competitive use has a chassis (50) supporting two wheels (12) on a common axis (14) which can be independently driven by respective battery-powered electric motors (22) or internal-combustion engines or be independently kept stationary. Two laterally-spaced castor wheels (18) are disposed in one plane at a longer distance on one side of the axis, and are mounted on the chassis by independent resilient suspension means (52, 54, 56, 58, 60 and 62). Two laterally-spaced castor wheels (20) are disposed in another plane inclined to said one plane at a shorter distance on the other side of the axis, and are mounted directly on the chassis. A seat (32) protected by a roll-bar (38) is provided in the vicinity of the axis, and two twist grip speed controllers (64) for the respective motors or engines are located on the chassis within reach of the seat. A wheel (42) acts simply as a deflector. The disposition of the seat and the batteries relative to the axis is so arranged that there is insufficient weight on the castor wheels (18) to resist the torque exerted at the wheels (12) during sudden acceleration, as a result of which the vehicle will perform a so-called "wheely" whereby it rears up until the castor wheels (20) contact the ground as shown in broken lines. Deceleration will cause the vehicle to fall back onto its castor wheels (18). The vehicle can also be caused to turn rapidly in tight circles by appropriate independent control of the motors or engines. A remotely-controlled toy vehicle can employ the same principle of operation. |
