TORSIONAL VIBRATION DAMPERS HAVING A HUB WITH SPOKES ACTING AS A SECOND SPRING IN SERIES WITH AN ELASTOMERIC MEMBER
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United States of America Patent
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Issued Date -
Mar 2, 2017
app pub date -
Aug 26, 2016
filing date -
Aug 27, 2015
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Abstract
Torsional vibration dampers for rotating shafts are disclosed that have a hub or a hub portion of a pulley-hub monolithic body that has an innermost sleeve defining a bore, an outermost ring concentric with and spaced radially outward from the innermost sleeve, and a plurality of spokes connecting the innermost sleeve to the outermost ring that each have torsional flexibility to act as a first spring to attenuate torsional vibrations. The dampers include an elastomeric member positioned concentrically against the outermost ring or the innermost sleeve of the hub, where the elastomeric member acts as a second spring to attenuate torsional vibrations, and an inertia member positioned concentrically against the elastomeric member, which places the first spring and second spring in series. The dampers may be crankshaft, driveline, or direct drive dampers, and the equivalent spring rate for the first and second springs is governed by the elastomeric member.
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