| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a motor capable of suppressing an occurrence of such a situation that a rotor becomes unrotatable even when there occurs a situation where a rotation shaft and a bearing member move in such a direction that both separate from each other.SOLUTION: In a motor 1, when the gap between an outer peripheral surface 3c of a magnet 3 and an inner peripheral surface 10c of a stator 10 is G, the radius of a sphere 6 is r, the angle formed by a center axis Ls and a conical surface 2h of a rotation shaft 2 isθ, and the distance between an opening edge of the conical surface 2h and the center axis Ls of the rotation shaft 2 is R, the movable distance d, the radius r, the gap G, the angleθ, and the distance R satisfy a conditional express 1: R>r-cosθ+d-tanθand a conditional express 2: G>d-tanθ. Due to this, a bearing member 7 is displaced to a counter output side L2 and the rotation shaft 2 is inclined, the sphere 6 is prevented from getting out of the conical surface 2h and the magnet 3 is prevented from being attracted to the stator 10.</p> |
