Automatic continuously variable positive mechanical transmission with adjustable centrifugal eccentric weights and method for actuating same

An automatic continuously variable positive mechanical transmission comprising:

• a transmission case (64) supporting an input shaft (30), an output shaft (31) and defining a point of support (35, 48);
• a positive kinematic link comprising a first planetary gear train (44) linking the input shaft to the output shaft, said positive kinematic link being at least partially supported by said point of support (35, 48);
• torque compensation means comprising eccentric weights (51, 61) subject to centrifugal forces for producing torque on a first set of planet wheels and a second set of planet wheels in the first planetary gear train;
• wherein the first set of planet wheels and the second set of planet wheels are carried by a common planet wheel carrier (E);
• the first set of planet wheels (1, 3) engages with at least one toothing (2, 4) which forms said point of support (35, 48), said first set of planet wheels is influenced by a first centrifugal device (36) being provided with eccentric weights (51);
• the second set of planet wheels (11, 13, 15) engages with planet wheels (12, 14, 16) linked respectively to the input shaft (30) and to the output shaft (31) and is coupled with a second centrifugal device (37) being provided with eccentric weight (61);
• said first and second centrifugal devices (36, 37) comprise, on a planet wheel of the first and the second sets of planet wheels, a secondary planetary gear train (5, 6, 49;
• 9, 10, 59), and secondary planet wheels (5, 10) of each secondary planetary gear train are linked to the eccentric weights (51, 61) and rotate at a speed equal to that of the common planet wheel carrier (E);
• and
• the eccentricity of the weights are adjustable during operation of the automatic continuously variable positive mechanical transmission.