The mechanical variator is based on an epicyclic transmission for variable ratios. The motor rotates the solar rings (5-6) which rotate the satellites (8). In turn these are in contact with the fixed outer ring (7) and external mobile ring (9).
The satellites rotate around their axes while simultaneously originate the rotation of the satellite carrier (output shaft).
By varying the axial position of the movable outer raceway (9) via the control screw, ball holder ring (14) and fixed cam (15), the satellites are forced to vary their radial position of revolution. Thus, the rolling diameters change, as does the angular speed of the output shaft.
When the rolling contact point of the outer rings (7) (9) is near the centre of satellites (8) the output speed will reduce: the output shaft will rotate more slowly thus increasing the output torque value.
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