公开(公告)号：US06739402B1

公开(公告)日：2004-05-25

申请号：US10359736

申请日：2003-02-07

申请人： Brian Olson ,  Lloyd Wach ,  Mel Svenson

发明人： Brian Olson ,  Lloyd Wach ,  Mel Svenson

IPC分类号： B60D1145

CPC分类号： B60D1/44 ,  A01B59/042 ,  B60D1/02 ,  B60D1/145 ,  Y10T29/49622

摘要： A transport drawbar for an agricultural tractor has an elongate forward drawbar section of substantially uniform rectangular cross section that mounts 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 parallel 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 has sufficient strength and stiffness that it can be used for transporting bulk cargo. The drawbar is manufactured by flame 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.

摘要翻译： 用于农用拖拉机的运输牵引杆具有以常规方式安装在拖拉机上的基本均匀的矩形横截面的细长的前拉杆部分。 细长的第二牵引杆部分从前部延伸到后部。 第二牵引杆部具有与前拉杆部相同的垂直厚度，并且具有相当大的宽度。 后牵引杆部分从第二牵引杆部分延伸到后部，牵引牵引杆部分具有与前部和第二部分相同的垂直厚度，并且宽度与前部的宽度基本相同。 两个锥形过渡部分分别设置在第二牵引杆部分和前后牵引杆部分之间。 在第二牵引杆部分中形成两个角度偏移，使得后牵引杆部分平行于第二牵引杆部分并从第二牵引杆部分向下偏移。 该牵引杆可用作现场牵引车牵引杆。 它还具有足够的强度和刚度，可用于运输散装货物。 牵引杆通过火焰切割用于牵引杆的坯料和模具来形成空白中的角度偏移。 将形成的坯料进行热处理。 在坯料的前部形成枢轴销孔，在尾部形成一个拉销孔。 然后将坯料淬火并喷丸硬化。