ASSEMBLY AND METHOD OF ASSEMBLING A MOTOR VEHICLE ALTERNATOR PULLEY AND A MOTOR VEHICLE ALTERNATOR COMPRISING ONE SUCH ASSEMBLY

摘要

The invention relates to an assembly comprising a drive pulley (30) and the rotor of a rotating electrical machine for a motor vehicle, such as an alternator or an alternator starter. The inventive assembly consists of (i) a shaft (18) bearing a rotor and a front ball bearing (26) and (ii) a pulley (30) comprising a peripheral operating area (92) which is intended to co-operate with a belt and a central hub (93) having an axial hole (94) for the passage of the shaft (18) of the rotor. The invention is characterised in that the pulley (30) comprises an inner grooved section (95) for the press fitting thereof on a complementary outer grooved section of the shaft (18) of the rotor.