| 摘要 |
PROBLEM TO BE SOLVED: To obtain a thin dynamic pressure bearing which has an aerodynamic pressure radial bearing, displays an excellent performance, and has a long life, when the motor is used for shaft-horizontal posture. SOLUTION: An aerodynamic pressure bearing is formed by providing a shaft 1 arranged with its shaft center in a horizontal posture, and having groove patterns 1a, 1b carved in its periphery, and fitting a bearing bush 2 at a specified gap freely-rotatably. One side of the aerodynamic pressure bearing is made to be an air intake side, and the other side is a tightly sealed side. The groove patterns 1a, 1b are carved in the shaft 1 so as to incline as against the shaft center direction of the shaft 1 at least on the air taking-in side.
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