Pulley freewheel alternator decoupler with a spring bare wire and lubrication with grease.

摘要

A decoupler assembly (20) for transferring torque between a shaft (15) and a drive belt (14) of an engine, said decoupler assembly comprising: a hub (22) configured to be fixedly mounted on the shaft (15 ), said hub (22) a first helical groove (46) formed therein; a carrier (75) rotatably mounted on said hub (22) including said carrier (75) a second helical groove (86) formed therein; a torsion spring (90) extending between one end (92) of the hub and an end (94) of the carrier for transferring torque between said hub (22) and the carrier (75), wherein said end (92 ) the cube is retained within said first helical groove (46) to prevent rotational movement between said end (92) of the hub of said torsion spring (90) and said hub (22) and said end (94) of the carrier is retained within said second helical groove (28) to prevent relative movement between said end (94) of carrier said torsion spring (90) and said carrier (75); a pulley (50) rotatably coupled to said hub (22), said pulley (50) an outer periphery (66) configured to frictionally engage with the drive belt (14), said pulley (50) an inner surface ( 56) formed therein; one bearing member (57) operatively mounted between said pulley (50) said hub (22) rotatably mounting said pulley (50) on said hub (22); a clutch spring (71) securely attached to said carrier (75) and having a plurality of helical coils (72) formed from a material of spring steel is uncoated and which frictionally engages said inner surface (56) said pulley (50) for selectively engaging said hub (22) and said pulley (50), enabling said torsion spring (90) and said clutch spring (71) wound in opposite directions to said spring clutch (71) it expands in a lace grip with said inner surface (56) during acceleration of said pulley (50) relative to said hub (22) and to release the engagement of gripping with said inner surface (56) during deceleration of said pulley (50) relative to said hub (22); a lubricant disposed between said clutch spring (71) and said inner surface (56) of the pulley (50) to minimize wear between them, said same or lubricant compatible with the existing grease in the bearing member (57 ); and a thrust washer (39) seated on said hub (22) in engagement with said carrier support (75).