Torque limited decoupler

Details Torque limited decoupler Torque limited decoupler

2011-07-12

2011-07-12

Le, David D (Department: 3655)

192 clutches and power-stop control

Clutches

Torque responsive

C192S055500, C192S04100R, C474S070000

Reexamination Certificate

active

07975821

ABSTRACT:
A decoupler assembly is provided for allowing an alternator to be rotatably driven by a serpentine belt in an engine of an automotive vehicle and for allowing the speed of the belt to oscillate relative to the alternator. A hub is fixedly carried by a drive shaft from the alternator for rotation therewith. A pulley is rotatably journaled to the hub by a ball bearing assembly. A bare, helical clutch spring is operatively coupled between the hub and pulley for transferring rotational movement from the pulley to the hub during acceleration of the pulley relative to the hub by the serpentine belt and for allowing the hub to overrun the pulley during deceleration of the pulley relative to the hub. A torque limiter, preferably a spring or sleeve, is wrapped about the torsion spring limiting outward expansion of the torsion spring and isolating the torsion spring from torques above a predetermined limit.

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