| 摘要 |
<p>1,047,023. Torsional vibration dampers; resilient drives. BORG-WARNER CORPORATION. Aug. 6, 1963 [Aug. 17, 1962], No. 31005/63. Headings F2S and F2U. A torsional vibration damper comprises a hub 1 with a radial flange 7 which extends between a pair of annular drive plates 10, 10 bolted to a spacer ring 12 and floating retainer plates 14, 14 which are located between the flange 7 and the drive plates 10, the flange 7, the retainer plates 14, and the drive plates 10 being provided with groups of apertures A, B and C the sets in each of which consist of a series of more or less registered apertures in the respective plates and each set within the same group having substantially identical dimensions. As shown group A comprises two sets of apertures diametrically opposed each set consisting of an elongated aperture 20 in each drive plate 10 and an aperture 22 in the flange 7 which is of equal arcuate length to a pair of circumferentially - spaced spring - retaining apertures 24, 26 in each of the floating plates 14, spring assemblies 28, 30 with spring seats 32 engaging respectively in the apertures 24, 26. The group C is located in a circle at the same radius as the group A the group B being arranged inwardly on a smaller concentric circle and the arrangement of the sets of apertures in groups B, C are identical to the sets in group A but for the fact that they incorporate a single spring assembly in a single aperture in each of the retainer plates 14. The extra length of the apertures 20 of group A in the drive plates 10 permit 8 degrees of angular movement relative to the flange 7 before any of the spring assemblies are engaged, the springs of groups B, C transmitting a load to the flange 7 only after the spring combinations 28, 30 of group A have accumulated 3 degrees and 8 degrees of angular movement respectively. The springs of groups A, B and C respectively yield totals of 11 degrees, 8 degrees and 3 degrees in one direction. Fig. 3 (not shown) illustrates a torque vs. deflection graph, the spring rates of the spring assemblies in groups A, B and C being progressively higher.</p> |
