IMPLEMENT FRAME CONSTRUCTION INCLUDING TUBE WITHIN A TUBE

摘要

An implement frame construction includes a fore-and-aft extending apertured tube with transversely extending tool mounting tubes with cross section matching the shape of the apertures. The tubes are inserted through the apertures to provide a mechanical connection not solely reliant on joint weld strength. The resulting joints are fillet welded on both sides of the fore-and-aft tube and provide more bending and torsional resistance than a butt-welded joint without need for gussets. The smaller tube runs continuously through the joint to reduce the number of components and welds necessary for a given frame configuration. The components themselves position the frame tubes relative to each other to simplify weld fixturing and increase resistance to parallelograming. Hinge areas are provided with welded tube-within-tube construction to prevent wall collapse and retain mounting bolt torque. A main frame section is constructed with continuous foreand-aft extending hitch tubes which transfer loading directly from the transverse tubes to the towing vehicle and include aft ends for supporting trailing hitch structure. Wing frame sections are built with a similar tube construction, and one frame configuration may be used for right or left wings.