Bead breaker device

1. A breaker device ( 1 ) comprising:

an arm ( 2 ) which slides along a sliding axis (X—X) in a pipe ( 3 ), said arm ( 2 ) also supported to slide vertically on a post ( 4 ) projecting up from a base;

an orientable bead breaker tool ( 10 ) rotatably engaged to an end of said arm ( 2 );

an actuating device ( 14 , 15 , 17 ) fixed on said arm ( 2 ) which moves said tool ( 10 ) between a first thrusting position and a second penetration position;

wherein said actuating device ( 14 , 15 , 17 ) includes a thrusting body ( 14 ) abutting said tool ( 10 ) and an elastic element ( 17 ) having opposite ends respectively engaged between said arm ( 2 ) and said tool ( 10 );

wherein said thrusting body ( 14 ) moves said tool ( 10 ) to the thrusting position by rotating said tool ( 10 ) on said arm ( 2 ) in a first direction and said spring element moves said tool ( 10 ) to the second penetration position by rotating said tool ( 10 ) on said arm ( 2 ) in a second direction opposite to the first direction.

2. The bead breaker device ( 1 ) according to claim 1 , wherein said thrusting body ( 14 ) is actuated by a cylinder-piston group ( 15 ) fixed to a plate ( 16 ) cantilevered from said sliding arm ( 2 ).

3. The bead breaker device ( 1 ) according to claim 2 , wherein said cylinder-piston group ( 15 ) is a pneumatic jack.

4. The bead breaker device ( 1 ) according to claim 1 , wherein said tool ( 10 ) comprises an oblong support body ( 11 ) rotatably abutting the end of said arm ( 2 ) and a disc ( 12 ) fixed to an end of said support body ( 11 ) for engagement with the bead of the tire.

5. The bead breaker device ( 1 ) according to claim 4 , wherein the end of said support body ( 11 ) opposite the one engaged to the disc ( 12 ) abuts said thrusting body ( 14 ).

6. The bead breaker device ( 1 ) according to claim 4 , wherein said support body ( 11 ) has a projection ( 11 b ) abuts against the end of said arm ( 2 ), when said tool ( 10 ) is in said penetration position.

7. The bead breaker device ( 1 ) according to claim 4 , wherein said support body ( 11 ) is provided with a nose ( 11 a ) fixed to said elastic means ( 17 ).

8. The breaker device ( 1 ) according to claim 1 , wherein said elastic means comprise a spring ( 17 ) having a first end inserted with a tight fit in a recess formed at the end of said arm ( 2 ) and arranged transversally to said sliding axis (X—X) of the arm ( 2 ).

9. The bead breaker device ( 1 ) according to claim 1 further comprising tilting means suitable for tilting said sliding arm ( 2 ) to the opposite side of said wheel, said tilting means allowing the rotation of said arm ( 2 ) about a rotation axis (Y—Y) parallel to and distal from the sliding axis (X—X).

10. The bead breaker device ( 1 ) according to claim 9 , wherein said tilting means comprise a tilting frame ( 18 ) hinged at one end to a sled ( 9 ), associated so that it can slide vertically with said post ( 4 ), through an articulation pin ( 19 ) extending along said rotation axis (Y—Y) and at the other end associated with said pipe ( 3 ), engagement elements ( 21 , 22 , 23 , 24 ) and disengagement elements ( 27 ) respectively suitable for locking said frame ( 18 ) in a work position and for unlocking said frame to allow it to be tilted.

11. The bead breaker device ( 1 ) according to claim 10 , wherein said engagement means ( 21 , 22 , 23 , 24 ) comprise an upper fastening pin ( 21 ) and a lower fastening pin ( 22 ) having the respective aces extending parallel and symmetrically to said rotation axis (Y—Y), said fastening pins ( 21 , 22 ) each being slidably inserted in a respective pair of opposite slots ( 25 , 26 ) formed on said sled ( 9 ) and extending vertically for a limited portion, at least one return spring ( 23 ) placed between the two fastening pins ( 21 , 22 ) suitable for applying a force drawing them together, at least one fastening body ( 24 ) associated with said tilting frame ( 18 ) and suitable for alternately attaching with the ends of each fastening pin ( 21 , 22 ).

12. The bead breaker device ( 1 ) according to claim 11 , wherein said fastening body ( 24 ) is provided with a pair of U-shaped grooves ( 24 a ) suitable for engaging with the ends of said fastening pins ( 21 , 22 ).

13. The bead breaker device ( 1 ) according to claim 11 , wherein said disengagement means comprises a pair of jacks ( 27 ) fixed to said sled ( 9 ) and respectively cooperating with said upper fastening pin ( 21 ) and lower fastening pin ( 22 ) and able to be actuated in contrast to said at least one return spring ( 23 ) to disengage said fastening pins ( 21 , 22 ) from said fastening body ( 24 ) allowing it to be tilted.

14. The bead breaker device ( 1 ) according to claim 13 , wherein said jacks ( 27 ) are actuated through a button ( 29 ) arranged on a handle ( 30 ) fixed to said pipe ( 3 ).

15. The bead breaker device ( 1 ) according to claim 9 comprising damping means ( 31 ) of the rotation speed of the arm ( 2 ) about the rotation axis (Y—Y).

16. The bead breaker device ( 1 ) according to claim 15 , wherein said damping means comprise a pneumatic jack ( 31 ).