| 摘要 |
A bicycle with two front wheels includes: a main frame provided at its front end with a vertically oriented head tube; a pair of front wheels non-rotatably provided on both ends of a front wheel shaft held below the head tube; a rear wheel that is rotatably supported by a rear end of the main frame; driving means for driving the front wheels; and steering means for steering the front wheels. The steering means includes a steering handle, and a steering shaft extending from the steering handle downward and including a vertical steering shaft portion that is rotatably supported by the head tube and that has a lower end for turning the front wheel shaft. The driving means includes a horizontal driving shaft pivotally supported by the main frame, and a vertical driving body that can be rotated by the horizontal driving shaft and that is coaxial with the head tube, and the vertical driving body rotates the front wheel shaft through driving-interconnection means.
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