| 摘要 |
PURPOSE:To simplify a structure and enable field magnetic poles to be exactly fixed, by fitting the elastic retainers of U-shaped cross sections in a space between the magnetic poles, and by fitting a cylindrical magnetic pole cover made of sheet metal material on the inner peripheral face of the magnetic poles. CONSTITUTION:A plurality of field magnetic poles 4, 5 are arranged via space on the inner peripheral face of a cylindrical yoke 2, and the retaining hardwares 3 of U-shaped cross sections are fitted in a space between the field magnetic poles. Also on the inner peripheral face of the field magnetic poles, a cylindrical magnetic pole cover 6 made of sheet metal material is fitted. The connected section 61 of the magnetic pole cover 6 is arranged in one of the spaces between the field magnetic poles, and the sections corresponding to other spaces are transformed, and the field magnetic poles 4, 5 are made to come in pressed contact with the inner face of the yoke 2. As the result, a fixing force excellent against thermal impact and mechanical impact, and high reliability can be obtained. |
