| 摘要 |
PURPOSE:To cancel drifting of a car and a cap by increasing damping force of variable damping force type shock absorbers provided in parallel to a chassis spring and a spring which supports the cab at the time of dumping of a load- carrying platform. CONSTITUTION:At the time of normal running, each variable damping force type shock absorber 5 (10, 19) mounted on a coil spring and a chassis spring supporting front wheels, ear wheels and a cab is in a state as shown in the figure. That is, the small hole 26 of a rotary valve 25 in a rod 22 is in a state of coordinating with a restriction 27 of the rod 22. Accordingly, upper and lower parts of a piston 23 are connected to each other not only through a restriction 24 but also through the restriction 27, and fluid resistance of oil is small. On the other hand, when a load-carrying platform is dumped, the rotary valve 25 is rotated by a control means, the small hole 26 is moved to the position where it does not coordinate with the restriction 27 and the restriction 27 is closed. Accordingly, damping force of each shock absorber 5 (10, 19) increases and the desired object can be achieved. |
