| 摘要 |
PURPOSE: A bearing preload regulating device is provided to cope with the wide change range of rotational speed of a spindle by using an elastically deformable member for proper preload. CONSTITUTION: A bearing preload regulating device(100) comprises a main spindle(110), a housing(120), a bearing unit(130), a rotor(140), and an elastically deformable member(150). A first sill(112) is formed in one end of the main spindle. The housing covers the main spindle and comprises a second sill(121) in the inner portion. The bearing unit is coupled with the first sill and supports the main spindle to be rotated. The rotor is stretched in circumferential direction while the main spindle is rotated. The elastically deformable member is filled with the fluid and extended in circumferential direction to press the bearing unit. |
