Patent ID: 6620066
Filing Date: 2003-09-16
Classification: H02K

Abstract:
Drive unit (1) for an alternator (2) of a motor vehicle, the alternator comprising a drive shaft (3) which can rotate around its own first axis (6): said drive unit (1) comprising a driven pulley (36) which can rotate around its own second axis (37): and means (42) for connection of said pulley (36) to said drive shaft (3); characterised in that it additionally comprises a revolution-multiplier device (43) and a torque-limiter device (15), which are in series with one another, wherein said revolution-multiplier device (43) comprises inner toothing (45), which is coaxial relative to, and integral with said pulley (36), and a pinion (4) which can rotate around said first axis (6) and engages with said inner toothing (45): said torque-limiter device (15) facing said pinion (4) axially, and wherein said torque-limiter device (15) comprises a first ring (16) which is integral with said pinion (4), a second ring (17) which is keyed onto said drive shaft (3), and resilient means (19) for compressing the said first and second rings (16, 17) axially against one another.