Plunger and pre-compression chamber link

1. An agricultural baler comprising:

a baling chamber;

a plunger configured for reciprocally moving in the baling chamber;

a first drive that is drivingly linked to the plunger;

a pre-compression chamber comprising a stuffer oriented for pushing a slice of crop material into the baling chamber;

a second drive in driving connection with the stuffer, the first drive and the second drive being linked by a mechanical link to ensure synchronization;

a first rotating shaft connected to the first drive;

a second rotating shaft connected to the second drive; and

a gearbox comprising an intermediary element linking the first and second rotating shafts, the gearbox mounted in the mechanical link wherein the gearbox is provided to adjust a synchronization timing between a position of the plunger and a position of the stuffer, the intermediary element movable between a first position and a second position, the first and second rotating shafts having a relative angular position with respect to each other,

wherein the relative angular position of the first and second shafts when the intermediary element is in the first position is different from the relative angular position of the first and second rotating shafts when the intermediary element is in the second position.

2. The agricultural baler of claim 1 , wherein a position of the intermediary element determines the synchronization timing.

3. The agricultural baler of claim 1 , wherein the intermediary element is movable to adjust the relative position of the first and second rotating shafts, thereby adjusting the synchronization timing.

4. An agricultural baler comprising:

a baling chamber;

a plunger configured for reciprocally moving in the baling chamber;

a first drive that is drivingly linked to the plunger;

a pre-compression chamber comprising a stuffer oriented for pushing a slice of crop material into the baling chamber;

a second drive in driving connection with the stuffer, the first drive and the second drive being linked by a mechanical link to ensure synchronization;

a first rotating shaft connected to the first drive;

a second rotating shaft connected to the second drive;

a coupling comprising an intermediary element linking the first and second rotating shafts, the coupling forming a portion of the mechanical link, wherein the coupling is provided to adjust a synchronization timing between a position of the plunger and a position of the stuffer, the intermediary element movable between a first position and a second position, the first and second rotating shafts having a relative angular position with respect to each other, wherein the relative angular position of the first and second shafts when the intermediary element is in the first position is different from the relative angular position of the first and second rotating shafts when the intermediary element is in the second position; and

an actuator, wherein the intermediary element is a planetary gearbox, wherein the first drive is coupled to the planetary gearbox, wherein the second drive is coupled to the planetary gearbox, and wherein the actuator is coupled to the planetary gearbox, thereby adjusting a relative position of the first drive and the second drive.

5. An agricultural baler comprising:

a baling chamber;

a plunger configured for reciprocally moving in the baling chamber;

a first drive that is drivingly linked to the plunger;

a pre-compression chamber comprising a stuffer oriented for pushing a slice of crop material into the baling chamber;

a second drive in driving connection with the stuffer, the first drive and the second drive being linked by a mechanical link to ensure synchronization;

a first rotating shaft connected to the first drive;

a second rotating shaft connected to the second drive; and

a coupling comprising an intermediary element linking the first and second rotating shafts, the coupling forming a portion of the mechanical link, wherein the coupling is provided to adjust a synchronization timing between a position of the plunger and a position of the stuffer, the intermediary element movable between a first position and a second position, the first and second rotating shafts having a relative angular position with respect to each other,

wherein the relative angular position of the first and second shafts when the intermediary element is in the first position is different from the relative angular position of the first and second rotating shafts when the intermediary element is in the second position,

wherein the intermediary element has a first end being provided with a straight gear and a second end being provided with a helical gear.

6. The agricultural baler of claim 5 , wherein the coupling further comprises an input gear and an output gear, wherein the intermediary element is mounted between the input gear and the output gear, wherein the input gear comprises a helical inner shape matching with the helical gear, and wherein the output gear comprises a straight inner shape matching with the straight gear, the input gear being mounted at a fixed distance with respect to the output gear so that moving the intermediary element or input gear in the direction of its axis results in a change of rotational position of the input gear with respect to the output gear.

7. The agricultural baler of claim 6 , wherein the input gear is connected to one of the first drive and the second drive, and wherein the output gear is connected to the other of the first drive and the second drive.

8. The agricultural baler of claim 5 , further comprising an actuator connected to the intermediary element or input gear for displacing the latter along its longitudinal axis, thereby amending a relative angular position of the input gear with respect to the output gear.

9. The agricultural baler of claim 1 , further comprising a controller and an actuator connected to the controller, and the controller is configured for steering the actuator for repetitive control of the gearbox.

10. An agricultural baler comprising:

a baling chamber;

a plunger configured for reciprocally moving in the baling chamber;

a plunger drive in driving connection with the plunger;

a pre-compression chamber comprising a stuffer configured for periodically pushing a slice of crop material into the baling chamber;

a stuffer drive in driving connection with the stuffer;

a mechanical link linking the plunger drive and the stuffer drive, the mechanical link comprising:

a first rotating shaft connected to the plunger drive;

a second rotating shaft connected to the stuffer drive, the first and second rotating shafts having a relative angular position with respect to each other; and

a gearbox comprising an intermediary element linking the first and second rotating shafts and configured for adjusting a synchronization timing of a position of the plunger and a position of the stuffer, the intermediary element movable between a first position and a second position,

wherein the relative angular position of the first and second shafts when the intermediary element is in the first position is different from the relative angular position of the first and second rotating shafts when the intermediary element is in the second position.

11. The agricultural baler of claim 10 , wherein a position of the intermediary element determines the synchronization timing.

12. The agricultural baler of claim 10 , wherein the intermediary element is movable to adjust the relative position of the first and second rotating shafts, thereby adjusting the synchronization timing.

13. An agricultural baler comprising:

a baling chamber;

a plunger configured for reciprocally moving in the baling chamber;

a plunger drive in driving connection with the plunger;

a pre-compression chamber comprising a stuffer configured for periodically pushing a slice of crop material into the baling chamber;

a stuffer drive in driving connection with the stuffer;

a mechanical link linking the plunger drive and the stuffer drive to permit the synchronization of the plunger and the stuffer, the mechanical link comprising:

a first rotating shaft connected to the plunger drive;

a second rotating shaft connected to the stuffer drive, the first and second rotating shafts having a relative angular position with respect to each other; and

an intermediary element linking the first and second rotating shafts and configured for adjusting a synchronization timing of a position of the plunger and a position of the stuffer, the intermediary element movable between a first position and a second position,

wherein the relative angular position of the first and second shafts when the intermediary element is in the first position is different from the relative angular position of the first and second rotating shafts when the intermediary element is in the second position;

an actuator, wherein the intermediary element is a planetary gearbox, wherein the plunger drive is coupled to the planetary gearbox, wherein the stuffer drive is coupled to the planetary gearbox, and wherein the actuator is coupled to the planetary gearbox, thereby adjusting a relative position of the plunger drive and the stuffer drive.

14. An agricultural baler comprising:

a baling chamber;

a plunger configured for reciprocally moving in the baling chamber;

a plunger drive in driving connection with the plunger;

a pre-compression chamber comprising a stuffer configured for periodically pushing a slice of crop material into the baling chamber;

a stuffer drive in driving connection with the stuffer;

a mechanical link linking the plunger drive and the stuffer drive to permit the synchronization of the plunger and the stuffer, the mechanical link comprising:

a first rotating shaft connected to the plunger drive;

a second rotating shaft connected to the stuffer drive, the first and second rotating shafts having a relative angular position with respect to each other; and

an intermediary element linking the first and second rotating shafts and configured for adjusting a synchronization timing of a position of the plunger and a position of the stuffer, the intermediary element movable between a first position and a second position,

wherein the relative angular position of the first and second shafts when the intermediary element is in the first position is different from the relative angular position of the first and second rotating shafts when the intermediary element is in the second position;

wherein the intermediary element has a first end being provided with a straight gear and a second end being provided with a helical gear.

15. The agricultural baler of claim 14 , wherein the intermediary element further comprises an input gear and an output gear, wherein the intermediary element is mounted between the input gear and the output gear, wherein the input gear comprises a helical inner shape matching with the helical gear, and wherein the output gear comprises a straight inner shape matching with the straight gear, the input gear being mounted at a fixed distance with respect to the output gear so that moving the intermediary element or input gear in the direction of its axis results in a change of rotational position of the input gear with respect to the output gear.

16. The agricultural baler of claim 15 , wherein the input gear is connected to one of the plunger drive and the stuffer drive, and wherein the output gear is connected to another of the plunger drive and the stuffer drive.

17. The agricultural baler of claim 14 , further comprising an actuator connected to the intermediary element or input gear for displacing the latter along its longitudinal axis, thereby amending a relative angular position of the input gear with respect to the output gear.

18. The agricultural baler of claim 10 , further comprising a controller and an actuator connected to the controller, and the controller is configured for steering the actuator for repetitive control of the gearbox.