| 摘要 |
1,071,001. Torsional vibration dampers; bearings. MOVIT INDUSTRIEANSTALT. Jan. 18, 1965 [Jan. 30, 1964], No. 2133/65. Headings F2A and F2S. A friction-type torsional vibration damper, particularly for damping the oscillations of the rotor 1 of a motor driven stepwise by changing magnetic fields, comprises an annular inertia mass 2 supported upon three equiangularlyspaced ball-bearings 3a, 3b, 3c which are urged by a circular spring 7 against a bearing race 4 fixed to, or integral with, the shaft 1. The spring 7 is fixed by screws 9 to the base of a circumferential groove 10 around the mass 2, the overlapping ends 7a, 7b of the spring being freely slidable over one another and slotted to receive a tensioning screw 8. The groove 10 is deepened at 10a so that, in this region, the spring can be radially adjusted to impose the correct friction upon the bearings 3a-3b, 3c. The latter can be replaced by roller or needle bearings, and the unbalance, due to the groove deepening at 10a, can be compensated for. The spring may be secured to the mass 2 at only one place between two balls. |
