| 摘要 |
<p>The purpose of the present invention is to improve the precision of a combination verticality of a shaft and a thrust plate by changing the combination structure of the shaft and the thrust plate. Particularly, the operation performance and the reliability of a motor driving are improved and the reliability of a thrust dynamic pressure generation is secured by improving the combination verticality of the shaft and the thrust plate by combining a combination guide part, which protrudes to the outer circumference of the shaft, with a combination groove of the thrust plate, and my improving the combination verticality of the shaft and the thrust plate.</p> |
