| 摘要 |
PURPOSE:To prevent an engaging projection for mounting a pole of a laminated pole core from buckling by producing the synthetic centrifugal force of a pole terminal board which operates at a pole terminal board and a field coil at an axially outside from a holding reaction which acts on the terminal board. CONSTITUTION:The dovetail 4a of a pole terminal board 4 is prolonged axially outwardly to form an extension. This extension is contacted with the dovetail groove 2a of a rim 2 to hole centrifugal force in the end section 11, an escape 12 is formed at the inside part 12 from the section 11 so as not to contact with the rim 2. The sizes of the 11, 12 are determined so that the operating line of holding reaction FR is disposed outside the operating line of the centrifugal force F. In this manner, since the moment which operates on the pole terminal board axially compresses the engaging projection of a pole core, the projection can hardly buckle. |
