Patent ID: 7534185

Claim:
Continuously variable mechanical transmission mechanism that allows extending the range of variation that contains: A) a core that comprises: a core input shaft (I) and a core output shaft ( 0 ); a first differential (Da) and a second differential (Db), a variator (V) connected to a first shaft ( 6 ) of the first differential (Da) and to a first shaft ( 7 ) of the second differential (Db), so that the variator (V) allows to regulate the proportion of the power that passes through each one of said differentials, from the core input shaft (I) to the core output shaft (o), having each one of said first differential (Da) and second differential (Db) a second shaft connected to the core input shaft (I) and a third shaft connected to the core output shaft (o); and B) an input shaft (I′) of the mechanism configured to be alternatively connected to the core input shaft (I) and to the core output shaft (o), and an output shaft (o′) of the mechanism configured to be alternatively connected to the core output shaft (o) and to the core input shaft (I), so that when the input shaft (I′) of the mechanism is connected to the core input shaft (I), the output shaft (o′) of the mechanism is connected to the core output shaft (o), and when the input shaft (I′) of the mechanism is connected to the core output shaft (o), the output shaft (o′) of the mechanism is connected to the core input shaft (I), C) comprising the mechanism in addition four gear ratios units (R 2n , R 2n+ , S 2n , S 2n+1 ), each one comprising a multiplicity of gear ratios, being configurated so that: the connection between the input shaft (I′) of the mechanism and the core input shaft (I) is done via a first (R 2n ) of said gear ratio units and according to a gear ratio selected from said first (R 2n ) unit, the connection between the input shaft (I′) of the mechanism and the core output shaft (o) is done via a second (R 2n+1 ) of said gear ratio units and according to a gear ratio selected from said second (R 2n+1 ) unit, the connection between the output shaft (o′) of the mechanism and the core input shaft (I) is done via a third (S 2n+1 ) of said gear ratio units and according to a gear ratio selected from said third (S 2n+1 ) unit, the connection between the output shaft (o′) of the mechanism and the core output shaft (o) is done via a fourth (S 2n ) of said gear ratio units and according to a gear ratio selected from said fourth (S 2n ) unit.