A mechanical positioning device (100) for positioning a component (200) comprising:
- a first toothed crown (1) integrally connected, during use, to said component (200), said first crown (1) being configured for rotating around a rotation axis (X) and having a substantially annular form with a first external face (1o), a first internal face (1i), a first upper face (1u), a first lower face (1d);
- said first crown (1) comprising a first toothing (D1) at said first internal face (1i) or at said first external face (1o);
- said first crown (1) also comprising a lower toothing (D1-3) at said first lower face (1d);
- said first toothing (D1) having a number of teeth equal to N1;
- a second toothed crown (2) fixed in rotation with respect to said rotation axis (X);
- said second crown (2) having a substantially annular form with a second external face (2o), a second internal face (2i), a second upper face (2u), a second lower face (2d);
- said second crown (2) comprising a second toothing (D2) at said second internal face (2i) or at said second external face (2o), said second crown (2) also comprising an upper toothing (D2-3) at said second upper face (2u);
- said second toothing (D2) having a number of teeth equal to N2;
- a third toothed crown (3) interposed between said first crown (1) and said second crown (2);
- said third crown (3) being configured for rotating around said rotation axis (X) and having a substantially annular form with a third external face (3o), a third internal face (3i), a third upper face (1u), a third lower face (3d);
- said third crown (3) comprising a third toothing (D3) at said third internal face (31) or at said third external face (3o), a primary coupling toothing (D3-1) at said third upper face (3u) and a secondary coupling toothing (D3-2) at said third lower face (3d);
- said primary coupling toothing (D3-1) having a number of teeth equal to a number of teeth of said lower toothing (D1-3);
- said secondary coupling toothing (D3-2) having a number of teeth equal to a number of teeth of said upper toothing (D2-3);
- at least one satellite gear (4) associated with said third crown (3) and brought into rotation around said rotation axis (X) by said third crown (3);
- said at least one satellite gear (4) being engaged with said first toothing (D1) and with said second toothing (D2);
- said number of teeth N1 and number of teeth N2 being different from each other;
- said device (100) being configurable between the following configurations:
- a closed configuration (P1), wherein said lower toothing (D1-3) and said primary coupling toothing (D3-1) are engaged with each other, said upper toothing (D2-3) and said secondary coupling toothing (D3-2) are engaged with each other, and wherein said first crown (1), second crown (2) and third crown (3) are integral with each other;
- and
- an open configuration (P2), wherein said first crown (1), second crown (2) and third crown (3) are spaced from each other and said lower toothing (D1-3), primary coupling toothing (D3-1), secondary coupling toothing (D3-2), said upper toothing (D2-3) are not engaged with each other.