Concaves for an agricultural combine

1. A concave for an agricultural combine, comprising:

a first frame;

a second frame movable between a first position spaced apart from the first frame and a second position juxtaposed on either side of the first frame;

a threshing mat, the threshing mat comprises threshing bars each including a separating grate, and an engagement assembly non-destructively connecting each of the threshing bars to the first frame, wherein the threshing bars form openings therebetween for grain to pass through, the separating grate of each of the threshing bars extends across an adjacent one of the openings for separating grain from threshed crop material, and the separating grate of each of the threshing bars is fixedly connected to an adjacent one of the threshing bars; and

the engagement assemblies allow non-destructive removal of the threshing mat from the first frame, when the second frame is spaced apart from the first frame, and the threshing mat remains non-destructively connected to the first frame via the engagement assemblies and the second frame interacts with the threshing mat on either side of the first frame alone restraining non-destructive removal of the threshing mat from the first frame via the engagement assemblies, when the second frame is in the second position juxtaposed on either side of the first frame.

2. The concave according to claim 1 , wherein the second frame includes stops, the stops are juxtaposed on either side of the first frame and interact with the threshing mat alone restraining the threshing mat from being non-destructively removed from the first frame, when the second frame is juxtaposed to the first frame.

3. The concave according to claim 1 , wherein each said engagement assembly includes engagement elements carried by each of the threshing bars and corresponding complemental engagement elements carried by the first frame.

4. The concave according to claim 3 , wherein each of the engagement elements is a tongue, and each of the complemental engagement elements is a slot.

5. The concave according to claim 1 , further comprising a catch assembly non-destructively catches each of the threshing bars to the second frame, when the second frame is juxtaposed to the first frame.

6. The concave according to claim 5 , wherein each said catch assembly includes catch elements carried by each of the threshing bars and corresponding complemental catch elements carried by the second frame.

7. The concave according to claim 6 , wherein each of the catch elements is one of a key and a keyway, and each of the complemental catch elements is the other one of the key and the keyway.

8. The concave according to claim 7 , wherein the second frame includes stops, the stops are juxtaposed on either side of the first frame, interact with the threshing bars alone restraining the threshing bars from being non-destructively removed from the first frame, when the second frame is juxtaposed to the first frame, and carry the complemental catch elements.

9. A method of assembling a concave for an agricultural combine, comprising:

providing a first frame, threshing bars each including a separating grate, and a second frame movable between a first position spaced apart from the first frame and a second position juxtaposed on either side of the first frame, the second frame being in the first position;

non-destructively connecting each of the threshing bars to the first frame via an engagement assembly thereby allowing non-destructive removal of the threshing bars from the first frame via the engagement assemblies while the second frame is in the first position, the threshing bars being spaced apart forming openings therebetween for grain to pass through, and the separating grate of each of the threshing bars extends across an adjacent one of the openings for separating grain from threshed crop material; and

moving the second frame from the first position to the second position on either side of the first frame and fixedly connecting the separating grate of each of the threshing bars to an adjacent one of the threshing bars forming a threshing mat from the threshing bars while leaving the threshing bars of the threshing mat non-destructively connected to the first frame via the engagement assemblies, the second frame thereby interacting with the threshing mat on either side of the first frame alone restraining non-destructive removable of the threshing mat from the first frame via the engagement assemblies.

10. The method according to claim 9 , wherein the step of fixedly connecting the separating grate of each of the threshing bars to an adjacent one of the threshing bars further includes welding the separating grate of each of the threshing bars to an adjacent one of the threshing bars.

11. The method according to claim 9 , further comprising releasably securing the second frame to the first frame.

12. The method according to claim 9 , wherein the non-destructive removable connections each comprise a tongue-and-groove assembly.

13. A method of assembling a concave for an agricultural combine, comprising:

providing a first frame, threshing bars each including a separating grate, and a second frame movable between a first position spaced apart from the first frame and a second position juxtaposed on either side of the first frame, the second frame being in the first position;

non-destructively connecting each of the threshing bars to the first frame via an engagement assembly thereby allowing non-destructive removal of the threshing bars from the first frame via the engagement assemblies while the second frame is in the first position, the threshing bars being spaced apart forming openings therebetween for grain to pass through, and the separating grate of each of the threshing bars extends across an adjacent one of the openings for separating grain from threshed crop material; and

moving the second frame from the first position to the second position on either side of the first frame, removably catching the threshing bars to the second frame via non-destructive removable catch connections, and fixedly connecting the separating grate of each of the threshing bars to an adjacent one of the threshing bars forming a threshing mat from the threshing bars while leaving the threshing bars of the threshing mat non-destructively connected to the first frame via the engagement assemblies, the second frame thereby interacting with the threshing mat on either side of the first frame alone restraining non-destructive removable of the threshing from the first frame via the engagement assemblies.

14. The method according to claim 13 , wherein the step of fixedly connecting the separating grate of each of the threshing bars to an adjacent one of the threshing bars further includes welding the separating grate of each of the threshing bars to an adjacent one of the threshing bars.

15. The method according to claim 13 , further comprising releasably securing the second frame to the first frame.

16. The method according to claim 13 , wherein the non-destructive removable connections each comprise a tongue-and-groove assembly.

17. The method according to claim 13 , wherein the non-destructive removable catch connections each comprise a key-and-keyway assembly.

18. A method of assembling a concave for an agricultural combine, comprising:

providing a frame, threshing bars each including a separating grate, and stops movable between a first position spaced apart from the frame and a second position juxtaposed on either side of the frame, the stops being in the first position;

non-destructively connecting each of the threshing bars to the frame via an engagement assembly thereby allowing non-destructive removal of the threshing bars from the frame via the engagement assemblies while the stops are in the first position, the threshing bars being spaced apart forming openings therebetween for grain to pass through, and the separating grate of each of the threshing bars extends across an adjacent one of the openings for separating grain from threshed crop material; and

moving the stops from the first position to the second position juxtaposed on either side of the frame and fixedly connecting the separating grate of each of the threshing bars to an adjacent one of the threshing bars forming a threshing mat from the threshing bars while leaving the threshing bars of the threshing mat non-destructively connected to the frame via the engagement assemblies, the stops thereby interacting with the threshing bars on either side of the frame alone restraining non-destructive removal of the threshing mat from the frame via the engagement assemblies.

19. The method according to claim 18 , wherein the step of fixedly connecting the separating grate of each of the threshing bars to an adjacent one of the threshing bars further includes welding the separating grate of each of the threshing bars to an adjacent one of the threshing bars.

20. The method according to claim 18 , further comprising releasably securing the stops to the frame.

21. The method according to claim 18 , wherein the non-destructive removable connections each comprise a tongue-and-groove assembly.

22. A method of assembling a concave for an agricultural combine, comprising:

providing a frame, threshing bars each including a separating grate, and stops movable between a first position spaced apart from the frame and a second position juxtaposed on either side of the frame, the stops being in the first position;

non-destructively connecting each of the threshing bars to the frame via an engagement assembly thereby allowing non-destructive removal of the threshing bars from the frame via the engagement assemblies while the stops are in the first position, the threshing bars being spaced apart forming openings therebetween for grain to pass through, the separating grate of each of the threshing bars extends across an adjacent one of the openings for separating grain from threshed crop material; and

moving the stops from the first position to the second position juxtaposed on either side of the frame, removably catching the threshing bars to the stops via non-destructive removable catch connections, and fixedly connecting the separating grate of each of the threshing bars to an adjacent one of the threshing bars forming a threshing mat from the threshing bars while leaving the threshing bars of the threshing mat non-destructively connected to the frame via the engagement assemblies, the stops thereby interacting with the threshing bars on either side of the frame alone restraining non-destructive removal of the threshing mat from the frame via the engagement assemblies.

23. The method according to claim 22 , wherein the step of fixedly connecting the separating grate of each of the threshing bars to an adjacent one of the threshing bars further includes welding the separating grate of each of the threshing bars to an adjacent one of the threshing bars.

24. The method according to claim 22 , further comprising releasably securing the stops to the frame.

25. The method according to claim 22 , wherein the non-destructive removable connections each comprise a tongue-and-groove assembly.

26. The method according to claim 22 , wherein the non-destructive removable catch connections each comprise a key-and-keyway assembly.