COMPACT EPICYCLIC GEARING

A compact epicyclic gearing (50) has a first stage (14) comprising an input shaft (1) kinematically connected to three first sun gears (11), each engaged with a first planet gear (13) rotatably supported by a first planet carrier (9) which is meshed with a first outer gear (15) inside a case (22) of the epicyclic gearing (50).Each first sun gear (11) is joined to a respective shaft (6) at one end thereof a respective pulley (4) is keyed on which an annular belt or chain (3) of an annular gearing (16) engages which is engaged to a pinion (2) keyed on the input shaft (1).The rotation of the input shaft (1) is transmitted by means of the belt or chain (3) to each pulley (4) so as to rotate the respective shaft (6) which supports the corresponding first sun gear (11).The shaft (6) axis is parallel to the axis of the input shaft (1) and rotates along a circumference, dragging in rotation, by means of each first planet gear (13), the first planet carrier (9), whose rotation axis is coaxial to the axis of the input shaft (1).