A decoupler is provided for an endless drive member that is driven by an engine, comprising a hub that is mountable to a shaft; a pulley that is engageable with the endless drive member; an isolation spring that is a helical torsion spring having a first helix direction, wherein during torque transfer through the isolation spring, the isolation spring expands radially; a wrap spring clutch that surrounds the isolation spring and is positioned for torque transfer in series with the isolation spring between the hub and the pulley, wherein the wrap spring clutch is helical and has a second helix direction; and a sleeve that is positioned radially between the isolation spring and the wrap spring clutch, wherein the sleeve includes a plurality of coils, wherein at least one of the coils has a wave that extends in a circumferential direction.
IMPROVED SLEEVE CONFIGURATION FOR INHIBITING SPRING ENTANGLEMENT
CONFIGURATION DE MANCHON AMELIOREE SERVANT A EMPECHER L'EMMELEMENT DE RESSORT
2015-11-13
Patent
Electronic Resource
English