| 摘要 |
PURPOSE:To reduce a distance between the peripheral surface of a shaft and the circumferential surface of an armature winding by making a roller bearing as a double row roller bearing forming a double row internal track on the circumferential surface of an outside wheel, and fitting outside and fixing the armature winding directly to the peripheral surface of the outside wheel. CONSTITUTION:A plurality of rolling bodies 19 are respectively provided between a pair of internal tracks 17 and an external track 18 formed in the peripheral surfaces of a pair of inside wheels 15, and a rotary shaft 3 is capable of rotating at the inside of the outside wheel 16. By such a roller bearing, when the rotary shaft 3 is held on the inside of the outside wheel 16, one inside wheel 15 is stuck on the peripheral surface of the rotary shaft 3 in advance, and the other inside wheel 15 is pushed in the direction of the shaft. According to the constitution, the other inside wheel 15 is stuck on the rotary shaft in a state to provide appropriate preload for each of the rolling bodies 19. |
