| 摘要 |
Disclosed herein is a spindle motor including a rotating part in which a hub is coupled to a rotating shaft and a fixing part in which a sleeve is coupled to the rotating shaft, wherein the rotating shaft has a thrust hydrodynamic bearing part formed on a lower end thereof, and the thrust hydrodynamic bearing part has a scroll groove formed therein. The thrust hydrodynamic bearing part of the spindle motor is formed in a micro-gap between a lower portion of the rotating shaft and an upper portion of a support to reduce frictional force, thereby making it possible to increase efficiency in power consumption, assembling accuracy is mitigated, thereby making it possible to increase a degree of freedom in design, the scroll groove is formed in the thrust hydrodynamic bearing part, thereby making it possible to solve problems of rotation unbalance and dynamic pressure unbalance. |
