Tilling shaft for power tiller

Details Tilling shaft for power tiller Tilling shaft for power tiller

A - Human Necessities

01

B

A01B 33/10 (2006.01) A01B 33/02 (2006.01) A01B 33/08 (2006.01) F16D 1/08 (2006.01)

Patent

CA 2184396

A tilling shaft for a power tiller includes: an insertion portion formed on a distal end side of the tilling shaft projecting from a power transmission case of the power tiller, the insertion portion having a substantially circular cross section; a polygonal shaft portion formed on a proximal end of the tilling shaft adjacent the insertion portion; and a tapered portion formed between the polygonal shaft portion and the insertion portion such that a diameter of the tapered portion is gradually increased from a distal end side toward a proximal end of the tapered portion. The diameter of the insertion portion may be identical to the diameter of an imaginary circle inscribed within the polygonal shaft portion. Alternatively, the diameter of the insertion portion may be slightly larger than the diameter of the imaginary circle, and a plurality of ribbon-shaped supporting surfaces are formed on the insertion portion in such a manner as to be flush with respective side surfaces of the polygonal shaft portion.

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