Variable-diameter single or double pulley and speed variator including such a double pulley

摘要

Pulley which can be used singly or doubly. …??It is composed of a guide structure (3) of segments (4) which can be displaced in accordance with the adjustment of connecting rods (7), advantageously extended symmetrically with respect to a pivot (9) and carrying an opposite counterweight. The segments (4) are arcs of a circle in order to ensure a satisfactory adherence of the belt. The counterweights are advantageously segments (42), which makes it possible to obtain a double pulley formed from two coaxial pulleys, the diameters of which vary in opposite directions. The centrifugal force on the segments (4) can be balanced. …??Application to continuous speed variators. …IMAGE…