Filtering pulley
AssigneeMuviq S.R.L.
InventorsGianluca Cariccia, Andrea Guala, Gilberto Delle Rose
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Abstract
A filtering pulley for an accessory transmission of an internal combustion engine has a hub, a crown, a filtering unit for transmitting the torque that is interposed between the hub and the crown, a torsion spring, a carrier, and a torque limiting joint. The torque limiting joint has an open-loop strip spring and is configured to slide with respect to a surface of the crown when the torque transmitted between the crown and the hub reaches a predetermined level.
Claims15
Filtering pulley for an accessory transmission of an internal combustion engine, comprising a hub, an annular crown provided with a profile configured to cooperate with a transmission belt, externally coaxial around an axis to said hub and supported in free rotational motion on the hub itself, and a filtering unit for transmitting the torque interposed between said hub and said crown and comprising a torsion spring, a carrier and a torque limiting joint,
- said carrier cooperating by sliding with respect to a portion integral with one of said hub and said crown, said carrier defining a spring holder and a projection extending along said axis and configured to cooperate with said torque limiting joint,
- said torsion spring being operatively interposed between said carrier and said one between said hub and said crown and being provided with two ends cooperating in contact with respective spring holders integral with said carrier and said one between said hub and said crown,
- said torque limiting joint being coupled by interference on one surface of the other between said crown and said hub
- said torque limiting joint comprising an open loop strip spring and being configured to slide with respect to said surface when the torque transmitted between said crown and said hub reaches a predetermined level,
- wherein said strip spring defines a pair of axial projections configured to cooperate selectively circumferentially in contact with, respectively, at least one axial projection integral with said hub and at least one projection axial integral with said carrier.
Dependencies are inferred from the claim text.