| 摘要 |
PURPOSE:To reduce stress to be generated at connecting bolt and enhance reliability of the machine regardless of the material being used at a lump shaped iron core by a mechanism wherein a metal plate having a projection is disposed between the end surface of a lump shaped iron core and a joining bolt head, thereby the belt head is fixed not to be displaced toward the outside of the radial direction. CONSTITUTION:An anular metal plate 14 having a projection 15 is disposed between the end surface of a lump shaped iron core 7a and a joining bolt head 8, and its projection is inserted into a concave groove 16 being cut on the end surface of the iron core 7a, thereby the metal plate 14 is made so as not to be displaced toward the radial direction. The outside part for radial direction at the joint bolt head 8 is welded to the metal plate 14 so as not to be displaced toward radial direction. Accordingly, when a centrifugal force is applied on the joint bolt 8 on account of the rotation of the electric rotary machine, the bolt 8 deforms in the manner as shown by the ''dash and two dots'' chain line in the Fig. wherein its both ends being fixedly suspended. Due to this mechanism, damages to occur at the device is prevented resulting in the enhancement of reliability thereof. |
