| 摘要 |
PROBLEM TO BE SOLVED: To provide a cone bearing device wherein wearing between a cone bearing and a rotary unit can be prevented by increasing a level of fluid pressure generated from a dynamic pressure generating groove to decrease a floating time of the rotary shaft. SOLUTION: A cone bearing device includes a fixed shaft 40 fixed with one end to a lower part bearing bracket, a cone bearing 45 connected to the other end of the fixed shaft 40, and a bushing formed respectively in the inside with a cone groove receiving the cone bearing 45 and a through hole extended to the cone groove to insert the fixed shaft 40 capable of sliding. The cone bearing 45 includes a first dynamic pressure generating groove 45a formed in an outer side surface and a second dynamic pressure generating groove 45b formed in an upper end surface. |
