| 摘要 |
A ride-height measurement device and method for tractor-trailers measures the elevation from the axis or center point of each of one or more suspension system axles and the bottom surface of its respective trailer subframe or slider, trailer body or tractor frame. The device (10) includes a base (11) and a slide (12) adjustably mounted on the base. An unknown ride-height is measured by placing an elongated top edge (17) of the base flush against the bottom surface of the slider, trailer body or tractor frame. A thumbscrew (23) is loosened to enable slidable adjustment of the slide (12) relative to the base (11), until a bottom edge (47) of the slide contacts the uppermost surface of the axle. An indicator on the base indicates a reading on a selected English (14) or metric scale (15) on the slide, and the measurement then can be preserved if desired by tightening the thumbscrew (23). The device automatically compensates for the vertical distance between the uppermost surface of the axle from which the measurement is taken, and the axis or centre point of the axle. If the measurement differs from the tractor-trailer manufacturer's recommanded ride-height, an adjustment in the ride-height is made. Alternatively, the device can be used to determine if tractor-trailer ride-height is correctly set, by setting the device to the manufacturer's predetermined recommended ride-height measurement, and placing the device between the uppermost surface of the axle and the bottom surface of the slider, trailer body or tractor frame. |
