Patent ID: 8226518
Filing Date: 2012-07-24
Classification: F16H

Abstract:
1. A continuously variable transmission, comprising: a continuously variable speed device; the continuously variable speed device comprising a first epicyclic gear and a variator of a belt type with a first and a second pulley; the first epicyclic gear is coupled to the first and second pulley and to an intermediate shaft; the variable speed device is able to reduce the rotation speed of the intermediate shaft to zero from either rotation direction; the continuously variable transmission further comprising an entry shaft, a reducer and a second epicyclical gear; the entry shaft is coupled to the first pulley of the belt type variator and to the second epicyclic gear; the reducer is placed axially between the first and second epicyclic gear and is coupled to the intermediate shaft and the second epicyclic gear; a final outlet shaft of the continuously variable transmission is coupled to the second epicyclic gear; the speed of the final outlet shaft may be varied in any rotation direction and to zero by means of a combination of different diameters of the first pulley together with various forms of interlocking of reducer elements generating either a reducer transmission ratio of 1:1 or a different reducer transmission ratio; wherein: the first pulley is coupled to a sun of the first epicyclical gear; the second pulley is coupled to a crown wheel of the first epicyclic gear through transmission means; the reducer is an epicyclic gear; the intermediate shaft is coupled to a satellite carrier of the first epicyclic gear and to a sun of the reducer; a crown wheel of the reducer is coupled to a sun of the second epicyclic gear; a satellite carrier of the second epicyclic gear is coupled to the final outlet shaft; the entry shaft having a first and a second gear pinion; a crown wheel of the second epicyclic gear is coupled to the second gear pinion of the entry shaft; the first pulley is coupled to the entry shaft by a first gear pinion; the reducer generating a reducer transmission ratio of 1:1 when the sun and a satellite carrier of the reducer are interlocked or generating a different reducer transmission ratio when the satellite carrier is stopped by an interlocking mechanism.