| 摘要 |
PURPOSE:To provide the automatic restoring action on a rotary shaft, by providing auxiliary annular magnets, which generate reverse force to the main permanent magnets so as to correct a tilt of the rotary shaft, in each of a pair of main annular magnets supporting the rotary shaft by attractive or repulsive force of the magnets. CONSTITUTION:If a shaft 5 tilts to the right side, an auxiliary magnet 19 generating repulsive force goes out of a magnet facing surface in the left side of the shaft 5, while an auxiliary magnet 20 goes out in the right side. Consequently, in the right side of the shaft 5, repulsive force produced between the magnets 19, 20 decreases, further a distance producing attractive force is equal to that when the shaft is not tilted. While in the left side of the shaft, a facing distance provided between main magnets 17, 18 decreases to a distance (e), and repulsive force, being generated between the auxiliary magnet 20 and the main magnet 17, corresponds to a distance (f). In this way, if the shaft 5 is tilted, magnetic attractive force in its tilted direction generates unbalance so as to correct a tilt, thus automatically correcting the tilt. |
