| 摘要 |
A transport drawbar for an agricultural tractor has an elongate forward drawbar section of substantially uniform rectangular cross section that moun ts on the tractor in the conventional way, An elongate second drawbar section extends to the rear from the forward section. The second drawbar section has the same vertical thickness as the forward drawbar section and a substantially greater width. A trailing drawbar section extends to the rear from the second drawbar section, the trailing drawbar section having the same vertical thickness as the forward and second sections and a width substantially the same as the width of the forward section. Two tapering transition sections are provided between the second drawbar section and the forward and trailing drawbar sections respectively. Two angular offsets are formed in the second drawbar section such that the trailing drawbar section is paralle l to and offset downwardly from the second drawbar section. This drawbar can be used as a conventional tractor drawbar for pulling implements in the field. It also ha s sufficient strength and stiffness that it can be used for transporting bulk cargo. The drawbar is manufactured by dame cutting a blank for the drawbar and die forming the angular offsets in the blank. The formed blank is heat treated. Pivot pin holes are formed in the forward section of the blank and a draw pin hole in the trailing section . The blank is then quenched and shot peened.
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