Improvements in or relating to continuously-variable-ratio...

Details Improvements in or relating to continuously-variable-ratio... Improvements in or relating to continuously-variable-ratio...

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 15/28 (2006.01) F16H 15/38 (2006.01) F16H 61/664 (2006.01)

Patent

CA 2213289

A variator for a continously-variable-ratio transmission (CVT) of the half- toroidal traction roller type in which a ratio change results when a roller (6) exercices a first freedom of movement by rotating about a first or precession axis (10). In addition, the roller mounting has a further freedom of movement about a second or tilt axis (16). The precession axis (10) is inclined at an angle ("the castor angle") to a plane lying normal to the axis of the races, and each equilibrium value of the ratio angle correlates with a unique angular orientation of the roller (6) about the tilt axis (16).

Variateur destiné à une transmission à changement de vitesses continu du type à cylindres de traction à course semi-toroïdale, dans lequel un changement de rapport est obtenu lorsqu'un cylindre (6) exerce une première liberté de mouvement en tournant autour d'un premier axe ou axe de précession (10). De plus, le support du cylindre dispose d'une autre liberté de mouvement suivant un deuxième axe ou axe d'inclinaison (16). L'axe de précession (10) est incliné suivant un certain angle (angle de chasse) par rapport à un plan normal à l'axe des courses, et chaque valeur d'équilibre de l'angle du rapport est en corrélation avec une orientation angulaire unique du cylindre (6) par rapport à l'axe d'inclinaison (16).

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