公开(公告)号：US5232056A

公开(公告)日：1993-08-03

申请号：US795593

申请日：1991-11-21

申请人： John D. Long ,  John O. Nieting

发明人： John D. Long ,  John O. Nieting

IPC分类号： A01B59/04 ,  F16C11/04 ,  F16C33/08

CPC分类号： F16C11/04 ,  A01B59/04 ,  F16C33/08 ,  Y10S411/957

摘要： A drawbar assembly includes a self-locking bushing which is supported from the drawbar mounting bracket by a conventional nut and bolt fastener. Each end of the bushing includes radial line projections which bite into the mounting bracket and into a washer interposed between the nut and the bushing when the nut is threaded onto the bolt. By capturing both bushing ends, the bushing cannot rotate to loosen the nut or wear against the mounting bracket and washer. The bushing is formed as a single component with the radial line projections by a powdered metal process and hardened to provide wear resistance. Dissimilar metals in the bushing and the drawbar at the pivotal connection reduce wear.

摘要翻译： 牵引杆组件包括通过常规螺母和螺栓紧固件从牵引杆安装支架支撑的自锁衬套。 衬套的每个端部包括径向线突起，当螺母拧到螺栓上时，径向线突起咬入到安装支架中并进入插入螺母和衬套之间的垫圈中。 通过捕获两个衬套端部，衬套不能旋转以松开螺母或磨损安装支架和垫圈。 衬套通过粉末金属工艺形成为具有径向线突起的单个部件并且被硬化以提供耐磨性。 在枢轴连接的衬套和拉杆中的异种金属减少了磨损。