Drive shaft for use in portable working machine
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsHideshi Sasaki, Makoto Warashina, Hiroaki Uchitani
Life of this patent
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Abstract
A drive shaft to be inserted into a pipe-shaped operating pole for use in a portable working machine is provided. The drive shaft has at least one resin bush integrally formed on its outer peripheral surface. Thus integrally forming the bush on the drive shaft allows agreement between the axis center of the operating pole, the axis center of the bush and the axis center of the drive shaft, preventing the change of position of the bush during the use of the working machine, and resulting in the reduction of vibration of the drive shaft with the simple configuration.
Claims4
A drive shaft being able to be inserted into a pipe-shaped operating pole for use in portable working machines, said drive shaft comprising:
- one or more resin bushes integrally mounted on the periphery of said drive shaft to be slidable on said operating pole.
A method of integrally forming a plurality of bushes on the outer peripheral surface of a drive shaft to be able to be inserted into a pipe-shaped operating pole for use in portable working machines, said method comprising the steps of:
- placing one of a plurality of predetermined portions of said drive shaft in a molding die for clamping;
- injecting molten resin into a molding cavity of said molding die for forming said bush;
- opening said molding die after said bush is cooled;
- and
- moving said drive shaft to place a next one of said predetermined portions of said drive shaft in said molding die.
Dependencies are inferred from the claim text.