TRASMISSIONE MECCANICA VARIABILE IN MODO CONTINUO MEDIANTE ALMENO UN ORGANO FLESSIBILE

摘要

Mechanical transmission (10) by means of at least one flexible member (11), comprising: - a drive shaft (12.1) and a driven shaft (12.2) with mutually spaced and parallel axes, wherein said drive shaft (12.1) is rotated by means of motor means (M); - a drive pulley (13.1), connected to said drive shaft (12.1 ), and a driven pulley (13.2), connected to said driven shaft (12.2), said flexible member (11) being circulated between said pulleys (13.1, 13.2), in said plane; - a plurality of first operating cylinders (14.1) controlled by means of pressurized fluid, provided in said drive pulley (13.1) in radial arrangement, and a plurality of second operating cylinders (14.2) controlled by means of pressurized fluid, provided in said driven pulley (13.2) in radial arrangement; - a first control operating cylinder (20.1) by means of pressurized fluid, comprising a piston and a corresponding piston rod (20.10) that is kinematically connected with respect to said drive shaft (12.1) and that transforms the circular motion of said drive shaft (12.1) into harmonic motion of the respective piston; - a second control operating cylinder (20.2) by means of pressurized fluid, comprising a piston and a corresponding piston rod (20.20) that is kinematically connected with respect to said drive shaft (12.1) and that transforms the circular motion of said drive shaft (12.1 ) into harmonic motion of the respective piston, - a first control circuit (15.1) by means of pressurized fluid, branched in a fluid-tight manner between a passage (20.11) of pressurized fluid of said first control operating cylinder (20.1), a passage (16.11) of pressurized fluid of a first fluid-tight chamber (16.1) for distribution of pressurized fluid, provided in said drive pulley (13.1), and fluid tank means (17.1); - a second control circuit (15.2) by means of pressurized fluid, branched in a fluid- tight manner between a passage (20.21) of pressurized fluid of said second control operating cylinder (20.2), a passage (16.21) of pressurized fluid of a second fluid- tight chamber for distribution of pressurized fluid (16.2) provided in said driven pulley (13.2), and fluid tank means (17.2).