| 摘要 |
As one of the truck wheels (9) rotates it drives a pump, preferably a second pump cylinder (8), causing another cylinder (11) to store the energy in a spring device (12). The cylinder is connected to the lifting cylinder (1) via a line containing a valve (13). Opening the valve allows the energy stored in the spring device to be used to raise the lifting cylinder. The truck has two wheels and its lifting cylinder is used to move a lifting part, preferably with two forks. A first hydraulic pump cylinder (2) for hydraulic fluid is connected to the lifting cylinder. A lever arm is used to pressurise the hydraulic fluid by manual pumping. |
