METHOD FOR MANUFACTURING A PULLEY DEVICE, A PULLEY DEVICE ACCORDING TO SUCH A MANUFACTURING METHOD AND AN ENGINE FITTED WITH SUCH A PULLEY

摘要

The invention relates to a method for manufacturing a pulley device for a tension roller or a roller of a transmission element providing a pulley, at least two rolling-element bearings and a sleeve, the rolling-element bearings being assembled adjacently on the sleeve before the pulley is formed by injecting material onto the rolling-element bearings.

主权项

1. A method for manufacturing a pulley device for a tension roller or a roller of a transmission element providing a pulley, at least two rolling-element bearings and a sleeve, the method comprising:
(a) preassembling at least two rolling-element bearings, each having a single row of rolling elements, the rolling-element bearings each including an inner ring having a bore, an outer ring having an outer cylindrical surface, and a single row of rolling elements seated radially between the inner rings and the outer rings, wherein the rings rotate relatively about a central axis (X1), (b) positioning a sleeve coaxially with the rolling-element bearings, (c) assembling the at least two rolling-element bearings on an outer cylindrical surface of the sleeve, the inner rings of the rolling-element bearings bearing axially and successively against one another, the sleeve being common to all of the inner rings of the rolling-element bearings, and such that the outer cylindrical surface of the sleeve interferes with the bores of the inner rings of the axially adjacent rolling-element bearings, and (d) forming a plastic pulley by injecting material onto the outer cylindrical surfaces of the outer rings of the rolling-element bearings.