초록 ▼

A harrow assembly having a main frame section and two wing frame sections articulated on generally fore and aft axes on opposite ends of the main frame section is disclosed herein. Each frame section has a rockshaft rotatable thereon and the rockshafts are in axial alignment when the sections are in

A harrow assembly having a main frame section and two wing frame sections articulated on generally fore and aft axes on opposite ends of the main frame section is disclosed herein. Each frame section has a rockshaft rotatable thereon and the rockshafts are in axial alignment when the sections are in end-to-end relation with an interconnection between adjacent ends of the respective rockshafts. The interconnection includes a pair of arms that have contacting surfaces defined thereon and the contact point between the surfaces is generally in alignment with the hinge axis between the respective sections when the assembly is in a normal earthworking position.

대표청구항 ▼

In a harrow assembly including a center main frame section and a pair of outer wing sections pivoted on the outer ends of said main frame section for articulated movement about hinge axes extending fore and aft of the path of travel of the assembly, a main shaft journaled for rotation on said main f

In a harrow assembly including a center main frame section and a pair of outer wing sections pivoted on the outer ends of said main frame section for articulated movement about hinge axes extending fore and aft of the path of travel of the assembly, a main shaft journaled for rotation on said main frame section about an axis extending transversely of a fore and aft path of travel of the assembly, a pair of wing shafts rotated on the respective wing sections and axially aligned with said main shaft when said sections are in end-to-end relation, means for rotating said main shaft on said main section, and connection means between said main shaft and said wing shafts for rotating said wing shafts with said main shaft, the improvement of each of said connection means including a first arm fixed to said main shaft and extending generally rearwardly with respect to said main shaft, said first arm having a downwardly directed convex, generally arcuate elongated surface defined thereon with a lowermost edge of said surface being vertically aligned with a fore and aft axis, and a second arm fixed to an adjacent end of a wing shaft and extending generally rearwardly with respect to said wing frame, said second arm having an elongated upwardly directed surface adapted to engage said arcuate surface along a line of contact between said surfaces defining extended surface contact which is generally aligned with said fore and aft axis when said assembly is in a normal earthworking position.