| 摘要 |
A torsional vibration damper (24) has an outer drive plate (30) connected to a pair of retainer plates (38, 40) by an outer array of damping spr ings (32) disposed partly in windows formed in the outer drive plate and partly in fi rst windows formed in the retainer plates, and an inner drive plate (34) which is connected to the retainer plate by an inner array of damping springs (36) dispos ed partly in second windows formed in the retainer plates and partly in windows formed in the inner drive plate. The adjacent peripheries of the drive plates (3 0, 34) have a plurality of notches that are defined by radial tangs (42, 44) that are a rranged in confronting pairs when the torsional vibration damper is in a neutral positio n. The retainer plates are spaced apart and connected to each other by drive blocks (46) that are disposed partly in each notch of the outer drive plate and partly in each notch of the inner drive plate. The drive blocks engage the radial tangs of the drive plates to limit the relative angular displacements of the drive plates wit h respect to the retainer plates and the compression of the damping springs. Retai ner plate (40) carries an annular friction disk (52) that is biased into engagement with the inner drive plate (34) by spring (54).
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