| 摘要 |
PURPOSE:To increase the radial spring constant and the damping constant of the output bearing device without increasing the attracting force by constructing the device in such a manner that a stationary side magnet and a rotary body side magnetic material form opposing parts at the upper part and the lower part of the rotary body side magnetic material to produce the attracting force. CONSTITUTION:A magnetic material 22 is provided at the upper end of a rotary body 21. At the upper and lower parts of the rotary body side magnetic material 22, magnetic materials 24, 25 extend from both magnetic parts of the stationary side permanent magnet 23 so tht they form opposing parts against this rotary body side magnetic material, and this magnetic material is secured to the stationary body 23. By constructing the subject device in this manner, the axial attracting force is obtained as a difference between axial attracting forces produced at the opposing part of the rotary side magnetic material 22 and the stationary side magnetic materials 24 and 25. On the other hand, the radial spring constant and the damping constant are obtained as the sum of those at the opposing parts. |
