| 摘要 |
1,092,428. Vibration-dampers. B. E. O'CONNOR. July 16, 1965 [July 29, 1964], No. 30274/65. Heading F2S. A torsional vibration damper, e.g. for the crank-shaft of an I.C. engine, comprises a plurality of ring-shaped elements consisting of identical elements 10 which alternate with identical elements 12 each of the elements 10, 12 comprising a hub portion 24, and inner and outer rings 20, 16. Rigid spokes 18, 26, and 22, 28 connect respectively the outer rings 16 of the elements to the inner rings 20 and the inner rings 20 to the hubs 24, the spokes 18, 28 being diametrically opposed to the spokes 22, 26 and the outer spokes 18, 26 respectively of the elements 10, 12 being adjacent the inner spokes 28, 22 of the elements 12, 10. The spokes are axially aligned and in the same axial plane. Thin sheet metal shims (30), Fig. 2, not shown, are secured, e.g. by welding, between adjacent hub portions to form the hub of the inertia mass one of the elements having a flange (32) bolted to a crankshaft flange (36). Two, diametrically opposed, groups of four sets of small disc-shaped friction pads 44, 46 have their pads located between the pairs of adjacent surfaces of the elements 10, 12 each pad having one surface bonded to the surface of one of the elements 10, 12. Two sets of friction pads in each group are positioned between the outer, and two between the inner, rings of adjacent elements. Clamping pressure is applied to the elements 10, 12 and to each group of friction pads by means of a bolt 62, which extends through the spaces between the inner and outer rings of the elements 10, 12 and which has its head and a nut 64 located in annular washers 58, 58 carried by a pair of plates 48, 50 secured, by slidable rivet connections 52, 59, to the hub of the inertia mass. In operation, due to the location of the spokes 18, 22, and 26, 28, the outer and inner rings of the elements 10, 12 distort in opposite directions, the vibration energy being absorbed by the friction pads. In a modification, Fig. 7, not shown, the composite inertia mass is substantially the same as that described above and is enclosed by a casing, the spacing of the outer rings of the inertia elements being less than that between the inner rings and the easing being filled with viscous fluid. The housing is formed of two sheet metal stampings, with nested outer walls reinforced at their edges by a pair of metal rings brazed to the housing, and having outwardly-bowed side walls. |
