| 摘要 |
PURPOSE:To prevent a damage of a member by means of absorption of the difference in heat expansion, by forming opposite ends and opening ends making contact with each other in the conical surface of a virtual cone and producing a slide along the conical surface. CONSTITUTION:The inside surface of a step portion 13 and the inside surface of a step portion 14 are formed so as to form the conical surface of a virtual cone S, M. When a shaft 11 is expanded relatively to a member 12 due to the difference in heat expansion, the inside surfaces of the step portions 13, 14 move along the conical surface of the virtual cone S, M. Accordingly, the state of contact between the inside surfaces of the step portions 13, 14 and opening ends 16, 17 of a amount hole 15 is not varied and any excessive contact force between the shaft 11 and the member 12 is not produced to prevent damage of the member 12.
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