| 摘要 |
PURPOSE: To prevent the adverse influence to life deterioration and characteristics by solving the leakage of lubricant in a bearing, scattering of the lubricant from the bearing due to a pressure difference between the interior and the exterior of a motor, and generation of a damping effect due to the mixed air between a radial bearing and a thrust bearing in a dynamic pressure fluid bearing used for the motor. CONSTITUTION: A through hole 218 is provided at the center of the spiral groove 106 of a thrust receiving plate 105, sealed by a locking pin, and lubricant is fully filled even in a gap. Accordingly, a damping effect due to the air mixed between a radial bearing and a thrust bearing does not occur. Further, an O-ring 215 is so embedded as to seal between a bearing sleeve and an upper cover 217, and lubricant also fills up the sealed gap, and hence adverse influence does not act on life deterioration and characteristics. |
