Epicyclical gearing comprising a first and a second gear wheel turning around respective mutually parallel axes, each one comprising a respective first and a respective second crown wheel that are adjacent to each other; the gearing also comprising at least one third and at least one fourth gear wheel that are separate and mutually independent, a support body for the third and fourth gear wheels, the support body having hinge pins formed therewith as a one piece structure, the hinge pins providing a mount for the third and fourth gear wheels on the support body in a rotational manner around a third and, respectively, a fourth hinge axis parallel to the axes, the third gear wheel meshing with the respective first crown wheels and the respective fourth gear wheel meshing with the respective second crown wheels.
1. Epicyclical gearing comprising a sun gear comprising two outer straight toothed crowns positioned adjacent one another a first and a second gear wheel turning around respective mutually parallel axes, each comprising a respective first and a respective second crown wheel that are adjacent to each other, the gearing also comprising at least one third and at least one fourth gear wheel that are separate and mutually independent, a support body for said third and fourth gear wheels, hinge pins for mounting said third and fourth gear wheels on said support body in a rotational manner around a third and, respectively, with the support body and said hinge pins being formed as an integral, one piece structure, a fourth hinge axis parallel to said axes, said third gear wheel meshing with said respective first crown wheels and with a respective one of the two outer straight toothed crowns of said sun gear, and said respective fourth gear wheel meshing with said respective second crown wheels and with the other of the two outer straight toothed crowns of said sun gear.
2. The gearing according to claim 1 , wherein said third and fourth hinge axes are mutually coincident.
3. The gearing according to claim 1 , wherein said third and fourth hinge axes are transversally set apart from each other.
4. The gearing according to claim 1 , wherein said third and fourth gear wheels are arranged on axially opposite sides of said support body.
5. The gearing according to claim 1 , wherein said hinge pins of said third and fourth gear wheels protrude from said support body.
6. The gearing according to claim 1 , wherein said third and fourth gear wheels are coupled to said respective hinge pins by means of rolling-contact or self-aligning bearings.
7. The gearing according to claim 1 , further comprising a first set of said third gear wheels and a second set of said fourth gear wheels, said first and second sets being mutually coaxial and independent.
8. The gearing according to claim 7 , wherein said first set of wheels is angularly staggered with respect to said second set of wheels.
9. The gearing according to claim 7 , wherein each third wheel of said first set of wheels is coaxially aligned with a corresponding fourth wheel of said second set of wheels.
10. The gearing according to claim 8 , wherein said first and second set of gear wheels are arranged on axially opposite sides of a common annular support body.
11. The gearing according to claim 10 , wherein said annular body is in the form of a plate.
12. The gearing according to claim 1 , wherein said gear wheels are straight toothed.
13. The gearing according to claim 1 , wherein said support body comprises a plate positioned between said at least one third gear wheel and said at least one fourth gear wheel and around said sun gear.
14. Epicyclical gearing comprising a first and a second gear wheel turning around respective mutually parallel axes, each comprising a respective first and a respective second crown wheel that are adjacent to each other, the gearing also comprising at least one third and at least one fourth gear wheel that are separate and mutually independent, a support body for said third and fourth gear wheels, hinge pins for mounting said third and fourth gear wheels on said support body in a rotational manner around a third and, respectively, a fourth hinge axis parallel to said axes, said third gear wheel meshing with said respective first crown wheels and said respective fourth gear wheel meshing with said respective second crown wheels, and
wherein said third and fourth hinge axes are transversally set apart from each other.
15. Epicyclical gearing comprising a first and a second gear wheel turning around respective mutually parallel axes, each comprising a respective first and a respective second crown wheel that are adjacent to each other, the gearing also comprising at least one third and at least one fourth gear wheel that are separate and mutually independent, a support body for said third and fourth gear wheels, hinge pins for mounting said third and fourth gear wheels on said support body in a rotational manner around a third and, respectively, a fourth hinge axis parallel to said axes, said third gear wheel meshing with said respective first crown wheels and said respective fourth gear wheel meshing with said respective second crown wheels,
further comprising a first set of said third gear wheels and a second set of said fourth gear wheels, said first and second sets being mutually coaxial and independent, and
wherein said first set of wheels is angularly staggered with respect to said second set of wheels.
16. The gearing according to claim 15 , wherein said first and second set of gear wheels are arranged on axially opposite sides of a common annular support body.