| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an oscillation righting mechanism of a tricycle which can suppress the height of the tricycle to low height to expand a space for load-carrying platform, can determine a neutral point mechanically and accurately, and can maintain a stable righting function at all times. SOLUTION: A pair of levers 41, 42 on the right and left one end of which is supported on a load-carrying platform receiver (rear frame) 29 rotatably are provided, both levers 41, 42 are energized in the direction of reverse rotation by using their one end shaft support section (support shaft 43) as the center by springs 46, 47 on the right and left which are provided between an intermediate section of each lever 41, 42 and the load-carrying platform receiver 29 to bring the other ends (upper end part) 41a, 42a of each lever 41, 42 into contact with a main pipe 14 of a front frame, and a stopper part (bearing pipe 35) with which the intermediate sections 41b, 42b of each lever 41, 42 come into contact is provided in the load-carrying platform receiver (rear frame) 29 to constitute an oscillation restoration mechanism 10 of a tricycle. Consequently, since oscillation on the right and left of a front frame is restored by independent springs 46, 47 on the right and left respectively, permanent set in fatigue due to secular change does not occur in the springs 46, 47 easily and it is possible to maintain a stable righting function at all times.</p> |
