PULLEY WITH A ONE-WAY CLUTCH

摘要

The present free-wheel pulley comprises a shaft (10) externally presenting a cylindrical surface (12) and which is coupled to a load to be rotatively driven, such as a vehicle alternator. An outer ring (20) is mounted around the shaft (10) and defines an outer profile (21) to be operatively coupled, generally through a belt, to an engine, and defining internally, a plurality of cam surfaces (22) which form, with the cylindrical surface (12) of the shaft (22), wedge-like spaces (E). A roller (30) is mounted in each of said spaces (E) and maintained seated on the cylindrical surface (12) of the shaft (10) and on each respective cam surface (22) of the outer ring (20), each roller (30) being forced by a respective spring toward a narrower end of said space (E) so that each roller (30) rotatively couples the outer ring (20) to the shaft (10) when the rotation of the outer ring (20) is superior to the rotation of the shaft (10).