| 摘要 |
The disclosure herein describes a mechanism adapted to take up the overload exerted on the track of a crawler-type vehicle when an obstruction is lodged between the track and the wheel. The mechanism consists of a first cylinder filled with a fluid, such as oil or grease, and which receives a piston with one end connected to a wheel axle of the vehicle; the cylinder is hydraulically connected to a second fluid-filled cylinder by means of hydraulic conduits and valves. When the inward force on the wheel axle exceeds a predetermined value, the grease or oil in the first cylinder is transferred to the second cylinder; when the obstruction is removed, a prestressed spring in the second cylinder causes the return of the grease or oil into the first cylinder which, in turn, actuates its piston to return the wheel to its original position. A safety check valve is provided to allow the grease to be discharged outside the mechanism if the inward force on the wheel axle exceeds a second predetermined value greater than the first predetermined value.
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