| 摘要 |
PURPOSE:To obtain the titled motor of excellent cooling effect by providing metal rings in one body with a flange in the manner such that the ring envelops the outer cicumference of the iron core of the ring shaped stator, in concentrical and contacted status. CONSTITUTION:Metal ring 5 is formed in one body with a flange 3 or attached by welding, soldering, and the like, in the manner that the former ring envelops an iron core 1 in concentrical and contacted status. Accordingly, when the temperature at the iron core 1 rises, its outer diameter is enlarged by thermal expansion and the contact pressure at the surface with the ring 5 increases, making the contact heat resistance between the iron core and the metal ring smaller. |
