| 摘要 |
PURPOSE:To enhance the accuracy of the assembling, by fitting a ring-like strain absorbing member made of soft metals onto the outer peripheral section of a circular cylinder, and as well by securing the strain absorbing member in a closed casing by means of shrinkage fit. CONSTITUTION:A strain absorbing member 13 made of soft metals such as, for example, aluminum, is in a ring-like shape, having free end parts 14 in a part thereof. The inner diameter D of the strain absorbing member 13 slightly less than the outer diameter of the circular outer peripheral section 8a of a rotor bearing 8, and therefore, the strain absorbing member 13 is fitted onto the rotor bearing 8 after enlarging of the free end parts 14 of the member 13, and is fastened by the resiliency of the strain absorbing member itself. Any strain which is brought about in the rotor bearing by fastening force of a closed casing 2 due to shrinkage-fit, is absorbed by the strain absorbing member 3, thereby the accuracy of the assembling is enhanced. |
