| 摘要 |
This toy car has a selector on its sides for use, without picking the vehicle up, in selecting operation: (1) as a conventional electrically powered toy vehicle, at at least one speed, on a flat surface; (2) as an electrically powered climbing toy with particularly advantageous weight distribution, at at least one reduced speed with greater torque, on a steep and/or irregular surface; or (3) as an unpowered free-rolling toy vehicle. For climbing operation the car's battery, motor, etc. are in a symmetrical, compact, balanced, low geometry-about level with the wheels. With speed-reduction and selector parts they fill the toy's housing. The reduction mechanism has front-and-rear duplicate gearing: at each end, two worms that are both powered from the motor but through different reductions, and a worm gear shiftable between engagement with either worm by sliding on a square axle. Wheels are mounted to and driven by the axle ends. The worm gear also shifts to a point between the worms, engaged with neither, to give a "rolling neutral". The shifting mechanism sets electrical contacts to power the car only if the worm gear is engaged with one of the worms.
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