| 摘要 |
PURPOSE:To provide a longer life of a bearing by independently applying a positive thrust force on a thrust ball bearing and a reverse thrust force to a reverse thrust force enduring member which is fixed to a casing via an angular ball bearing. CONSTITUTION:When a positive thrust force F1 is applied, the force is endured by a thrust ball bearing 8 via a positive thrust plate 10. If a reverse thrust force F2 reverse to the positive thrust force is applied, a rotor shaft 5 is moved left and the force is endured by a reverse thrust force enduring member 13 via an angular ball bearing 12 which is fit to a positive thrust plate 10 without any load on the thrust ball bearing 8. |
