Agricultural drawbar and self-locking bushing therefor

Details Agricultural drawbar and self-locking bushing therefor Agricultural drawbar and self-locking bushing therefor

A - Human Necessities

01

B

A01B 59/042 (2006.01) A01B 59/04 (2006.01) F16C 11/04 (2006.01) F16C 33/08 (2006.01)

Patent

CA 2081430

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.

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