| 摘要 |
PURPOSE:To facilitate combination by a single press-fitting process only without forming uneven parts on a shaft member by fitting and combining the uneven part of a molded hole to the uneven part of the external circumference of a combining cylinder part by expanding action putting the cylindrical wall of a shaft member between both uneven parts. CONSTITUTION:One end opening part 2a of the cylindrical shaft member 2 to be combined with a york 12 is fitted and held in the molded hole 3 having uneven parts corresponding to the uneven parts on the external circumference of the combining cylinder part 12a of the york 12 and the combining cylinder par 12a of the york 12 is fitted in one end opening part 2a of the shaft member 2. When a cover member 15 with a diameter greater than the internal diameter of the combining cylinder 12a of the york 12 is press-fitted in such a fitting state, the cylindrical wall of the combining cylinder part 12a is expended in the radial direction. The cylindrical wall part of the shaft member 2 is put forcedly and molded by that expanding action between the uneven parts on the external circumference of the combining cylinder part 12a of the york 12 side and the uneven parts of the molded hole 3 and fitted firmly to the uneven parts of the external circumference of the combining cylinder part 12a of the york 12 side and combined with each other.
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