| 摘要 |
PURPOSE:To facilitate the adjustment in the axial position of a motor shaft by supporting said shaft in its axial direction by means of the magnetical attraction force of an inner magnet ring mounted to the shaft and an outer magnet ring mounted to motor housing. CONSTITUTION:A motor shaft 3 mounted partly with a rotary mirror 1 is supported in its radial direction by means of dynamopneumatic journal bearings 11 and is supported in its axial direction by means of the magnetical attraction force an inner magnet ring 14 mounted to the shaft 3 and an outer magnet ring 17 mounted to motor housing 8. A means of adjusting the positions of the magnets which can vary the supporting position in the axial direction of the shaft 3 mounted with the mirror 1 by adjusting the mounting position of either of the magnet 17 or the magnet 14 according to need is provided. The means for adjusting the position of the magnets is constituted of a belleville spring 21 and a ring 22 for adjusting position. |
