| 摘要 |
In a vehicle provided with a boom assembly that extends laterally therefrom during use, a self-leveling mount for said assembly employs a swinging linkage having dampening device incorporated into the pivotal connections of the linkage to suppress side-to-side oscillation of the boom. Each such device includes a tubular member arranged on a fore-and-aft axis of the vehicle, an axle in the member movable with an associated leg of the linkage, a resilient bushing in the member around the axle, and means subjecting the bushing to axial compression to force the bushing radially outwardly and inwardly into frictional engagement with the inner surface of the member and an outer surface of the axle it surrounds. Compression of the bushing is caused by force against pressure elements in the form of washers that bear against the ends of the bushing, thereby eliminating the need for oil-filled shock absorbers or other costly components to suppress boom oscillation.
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