Plant cutter apparatus
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsMakoto Warashina, Hiroaki Uchitani, Hideshi Sasaki
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Abstract
Drive shaft of a plant cutter apparatus includes an elongate main shaft portion made of a titanium alloy, and end shaft portions made of steel and integrally joined to the opposite ends of the main shaft portion. The titanium alloy has substantially the same mechanical strengths as the steel. Therefore, the titanium-alloy-made main shaft portion can secure rigidity that is normally required of the plant cutter's drive shaft, and can also reduce the weight of the drive shaft to thereby minimize unwanted sagging-induced vibrations of the drive shaft caused by the shaft's own weight.
Claims4
A plant cutter apparatus comprising:
- a pipe-shaped handling rod;
- a drive shaft passed through said pipe-shaped handling rod;
- a drive source unit mounted at one end of said handling rod for rotating said drive shaft;
- and
- a cutter blade mounted at another end of said handling rod for being rotated by rotation, via said drive source unit, of said drive shaft,
- said drive shaft being a different-metal-combined shaft that includes a main shaft portion made of a titanium alloy, and end shaft portions made of steel and integrally joined to opposite ends of said main shaft portion.
Dependencies are inferred from the claim text.