Movable platform for a skillet conveyor system of a vehicle assembly line

1. A movable platform of a skillet conveyor system of a vehicle assembly line, the movable platform comprising:

a substantially flat frame configured to interact with, a track of an assembly line; and

a rotation device for rotating a body of a vehicle, said rotation device being fixed to the substantially flat frame of the movable platform and completely integrated with said movable platform;

wherein said rotation device comprises:

a first rotatable support for supporting and rotating either a front part of the body or a rear part of the body, arranged at a first end of the movable platform; and

a second rotatable support for supporting and rotating the other of either the front part of the body or the rear part of the body, arranged at a second end of the movable platform, opposite to the first end;

wherein the first rotatable support is motorized, and the second rotatable support is driven by the first rotatable support to synchronize the rotation of the first rotatable support and the rotation of the second rotatable support irrespective of whether the body is supported by the first and second rotatable supports,

wherein said rotation device further comprises rotation transmission devices at least partially arranged inside the substantially flat frame of the movable platform,

wherein the movable platform further comprising a first column and a second column arranged orthogonally with respect to said flat frame, wherein the first rotatable support is constrained to the first column so as to be able to rotate with respect to the first column and the second rotatable support is constrained to the second column so as to be able to rotate with respect to the second column, and

wherein each rotatable support is constrained to the respective column by means of two stewing rings, between which an interface disc is interposed.

2. A movable platform according to claim 1 , wherein each rotatable support, integral with a respective first slewing ring of said two slewing rings, is connected to the respective interface disc, integral with a respective second slewing ring of said two slewing rings, by means of fixing means comprising a first pin integral with the interface disc and inserted in at least one elastic bushing inserted in a rigid bushing integral with the rotatable support.

3. A movable platform according to claim 2 , wherein said fixing means comprise a second pin, integral with the interface disc and inserted in a housing integral with the rotatable support; wherein there is provided a clearance between the second pin and the housing.

4. A movable platform according to claim 1 , wherein there is provided a locking device for each rotatable support.

5. A movable platform according to claim 4 , wherein said locking device is a cylinder-piston system, and wherein each rotatable support is provided with an engagement seat for an end of the piston of the respective cylinder-piston system, whereby during an insertion of the end of the piston in the respective engagement seat a rotation of the rotatable supports is forced to a predetermined position.

6. A skillet conveying system of a vehicle assembly line, comprising a plurality of movable platforms according to claim 1 , said movable platforms being arranged in sequence along the assembly line.

7. A movable platform of a skillet conveyor system of a vehicle assembly line, the movable platform comprising a rotation device for rotating a body of a vehicle, said rotation means being fixed to the movable platform and completely integrated with said movable platform,

wherein said rotation device comprises a first rotatable support for supporting and rotating a front part of the body, arranged at a first end of the movable platform, and a second rotatable support for supporting and rotating a rear part of the body, arranged at a second end of the movable platform, opposite to the first end;

wherein either the first rotatable support or the second rotatable support is motorized, and the other of either said first rotatable support or said second rotatable support is driven;

wherein there is provided a synchronization mechanism to synchronize the rotation of the first rotatable support and the rotation of the second rotatable support;

wherein the synchronization mechanism comprises rotation transmission devices at least partially arranged inside a substantially flat frame of the movable platform;

wherein there are provided a first column and a second column arranged orthogonally with respect to said flat frame, wherein the first rotatable support is constrained to the first column so as to be able to rotate with respect to the first column and the second rotatable support is constrained to the second column so as to be able to rotate with respect to the second column; and

wherein each rotatable support is constrained to the respective column by means of two slewing rings, between which an, interface disc is interposed.

8. A movable platform according to claim 7 , wherein each rotatable support, integral with a respective first slewing ring of said two slewing rings, is connected to the respective interface disc, integral with a respective second slewing ring of said two slewing rings, by means of fixing means.

9. A movable platform according to claim 8 , wherein said fixing means comprise a first pin integral with the interface disc and inserted in at least one elastic bushing inserted in a rigid bushing integral with the rotatable support.

10. A movable platform according to claim 9 , wherein said fixing means comprise a second pin, integral with the interface disc and inserted in a housing integral with the rotatable support; wherein there is provided a clearance between the second pin and the housing.

11. A skillet conveyor system of a vehicle assembly line, the skillet conveyor system comprising a plurality of movable platforms arranged in sequence along the assembly line, each of the plurality of movable platforms comprising a rotation device for rotating a body of a vehicle, said rotation device being fixed to the movable platform and completely integrated with said movable platform;

wherein said rotation device comprises:

a first rotatable support for supporting and rotating either a front part of the body or a rear part of the body, arranged at a first end of the movable platform; and

a second rotatable support for supporting and rotating the other of either the front part of the body or the rear part of the body, arranged at a second end of the movable platform, opposite to the first end;

wherein, the first rotatable support is motorized, and the second rotatable support is driven by the first rotatable support to synchronize the rotation of the first rotatable support and the rotation of the second rotatable support irrespective of whether the body is supported by the first and second rotatable supports,

wherein said rotation device further comprises rotation transmission devices at least partially arranged inside a substantially flat frame of the movable platform,

the skillet conveyor system further comprising a first column and a second column arranged orthogonally with respect to said flat frame, wherein the first rotatable support is constrained to the first column so as to be able to rotate with respect to the first column and the second rotatable support is constrained to the second column so as to be able to rotate with respect to the second column, and

wherein each rotatable support is constrained to the respective column by means of two slewing, rings, between which an interface disc is interposed.

12. A skillet conveyor system according to claim 11 , wherein each rotatable support, integral with a respective first slewing ring of said two slewing rings, is connected to the respective interface disc, integral with a respective second slewing ring of said two slewing rings, by means of fixing means comprising a first pin integral with the interface disc and inserted in at least one elastic bushing inserted in a rigid bushing integral with the rotatable support.

13. A skillet conveyor system according to claim 12 , wherein said fixing means comprise a second pin, integral with the interface disc and inserted in a housing integral with the rotatable support; wherein there is provided a clearance between the second pin and the housing.

14. A skillet conveyor system according to claim 11 , wherein there is provided a locking device for each rotatable support.