| 摘要 |
PROBLEM TO BE SOLVED: To improve the travel speed change and steering function of right and left traveling crawlers by automatically changing the steering quantity between the right and left traveling crawlers by the vehicle speed change of the right and left traveling crawlers. SOLUTION: This crawler working vehicle is provided with a gear shift member 25 for driving right and left traveling crawlers 2 at the same speed in the same direction, and a steering member 28 for driving the right and left traveling crawlers 2 at the same speed in the reverse directions. The steering quantity between the right and left traveling crawlers 2 is automatically changed by the vehicle speed change of the right and left traveling crawlers 2 that changes the gear shift quantity of the shift member 25, and the speed difference between the turning inside traveling crawler 2 and the turning outside traveling crawler 2 is changed only by changing vehicle speed to increase the speed difference between the right and left traveling carwlers 2 by the enlarged quantity of a turning radius conseqauent to speed increase, while the speed difference between the right and left traveling crawlers 2 is reduced by the reduced quantity of the turning radius consequent to speed reduction so as to change the vehicle speed without changing the turning radius. |
