Driven pulley for a continuously variable transmission
AssigneeCvtech R & D Inc.
InventorJocelyn Labbé
Life of this patent
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Abstract
The driven pulley is part of a continuously-variable transmission (CVT). The driven pulley comprises two coaxially-disposed sheaves defining between them a belt-receiving groove. It also has at least two axisymmetric ramp surfaces attached to one of the sheaves and at least two axisymmetric followers attached to the other sheave, each ramp surface being engageable by a corresponding one of the followers. At least some of the ramp surfaces are provided on corresponding ramp holders that are independent from the sheaves. A method of modifying the settings of a driven pulley and a method of assembling a driven pulley also disclosed.
Claims19
A driven pulley for a continuously-variable transmission, the driven pulley having a rotation axis and comprising two coaxially-disposed sheaves defining between them a belt-receiving groove, the driven pulley having at least two axisymmetric ramp surfaces attached to one of the sheaves and at least two axisymmetric followers attached to the other sheave, each ramp surface being engageable by a corresponding one of the followers;
- characterized in that at least two of the ramp surfaces are each provided on a separate ramp holder, the ramp holders being individually connected to said one of the sheaves and being disposed within a same radial plane.
A method of modifying settings of a driven pulley of a continuously-variable transmission, the method comprising:
- removing a plurality of ramp holders that are each separately connected to a sheave of the driven pulley;
- and then
- inserting a plurality of new individual ramp holders into the sheave of the driven pulley and connecting them to the sheave, the new ramp holders having ramp surfaces that are different in shape compared to ramp surfaces they replace.
A method of assembling a driven pulley of a continuously variable transmission, the method comprising:
- selecting one among a plurality of alternative models of helical ramp surfaces designed to be mounted into the driven pulley;
- and then
- connecting to the driven pulley a plurality of individual ramp holders on which are provided the ramp surfaces of the selected one among the plurality of the alternative models of helical ramp surfaces, the ramp holders with the selected ramp surface model being each independently connected to the driven pulley.
Dependencies are inferred from the claim text.