| 摘要 |
PURPOSE:To improve sensitivity of rotational operation to decrease an overweight of a steering wheel by providing an ellipse gear unit between the steering wheel and a steering arm. CONSTITUTION:When changing the direction, if a steeing wheel 16 is rotated, the arm parts 5a and 5a of the final cases 5 and 5 are rotated via a steering shaft 18, the first circular gear 19, the second circular gear 21, the medium shaft, the first ellipse gear 22, the second ellipse gear 24, a front shaft, a steering arm 25 and a left and a right rods 26 and 26, then to rotate the final cases 5 and 5 and the front wheels 6 and 6 are turned around to change the direction. When going straight, a long diameter part of the first ellipse gear 22 is engaged with the short diameter part of the second ellipse gear 24 to make a small deceleration ratio and to improve driving streight without the steering wheel being taken easily. When turning, the short diameter part of the first ellipse gear 22 is engaged with the long diameter part of the second ellipse gear 24 to make a big deceleration ratio to decrease the overweight of the steering. |
