SHREDDER DEVICE FOR FOODSTUFFS

Abstract

A shredder device including a feed hopper, a screw conveyor and a shredder module, wherein the screw conveyor includes a screw conveyor shaft driven by a screw conveyor motor unit and having a screw conveyor flight formed thereon, and the shredder module includes a cutting drum having cutting openings formed therein, and a main screw rotatably arranged in the shredder module and having a main screw shaft, which is driven by a main screw motor unit, and a main screw flight which is formed thereon and passes over the cutting openings. The shredder device enables a higher cutting capacity. The main screw shaft is coaxially enclosed by the screw conveyor shaft inside the feed hopper up to the shredder module.

Claims

1. A shredder device for foodstuffs, comprising: a feed hopper, a screw conveyor running at least in sections through the feed hopper, and a shredder module following the screw conveyor in an axial direction (x), wherein the screw conveyor comprises a screw conveyor shaft driven by a screw conveyor motor unit and having a screw conveyor flight integrally formed thereon in sections, and the shredder module comprises a cutting drum having cutting openings formed therein, and a main screw rotatably arranged in the shredder module having a main screw shaft, which is driven by a main screw motor unit, and a main screw flight, which is formed thereon and passes over the cutting openings, wherein the main screw shaft is coaxially enclosed by the screw conveyor shaft inside the feed hopper up to the shredder module.

2. The shredder device according to claim 1, wherein only the main screw shaft of the main screw is enclosed by the screw conveyor shaft.

3. The shredder device according to claim 1, wherein the screw conveyor shaft is designed as a closed tubular body in the axial direction.

4. The shredder device according to claim 1, wherein the screw conveyor motor unit and the main screw motor unit are arranged on a side of the screw conveyor facing away from the shredder module.

5. The shredder device according to claim 1, wherein the feed hopper has a first and second passage opening on opposite sides through which the screw conveyor shaft and the main screw shaft are passed.

6. The shredder device according to claim 5, wherein the shredder module is fastened on the front side around the second passage opening.

7. The shredder device according to claim 5, wherein the screw conveyor shaft and the main screw shaft are mounted in a common bearing block.

8. The shredder device according to claim 7, wherein within the axial direction (x) of the bearing block the screw conveyor shaft is rotatably supported by several first screw conveyor bearings with respect to the bearing block and the main screw shaft is rotatably supported by at least one first main screw bearing relative to the screw conveyor shaft.

9. The shredder device according to claim 8, wherein the first screw conveyor bearings and the at least one first main screw bearing are designed as roller bearings.

10. The shredder device according to claim 7, wherein at the bearing block the screw conveyor shaft has a screw conveyor disconnection point and the main screw shaft has a main screw disconnection point.

11. The shredder device according to claim 7, wherein the bearing block is arranged on an outside of the feed hopper around the first passage opening.

12. The shredder device according to claim 5, wherein a centering insert is inserted into the second passage opening, in which the screw conveyor shaft is rotatably supported by a second screw conveyor bearing and the main screw shaft is rotatably supported by a second main screw bearing.

13. The shredder device according to claim 12, wherein the second screw conveyor bearing and the second main screw bearing are designed as slide bearings.

14. The shredder device according to claim 5, wherein the shredder module comprises a pre-shredding drum which is arranged in the axial direction (x) between the cutting drum and the second passage opening.

15. The shredder device according to claim 14, wherein lands and grooves are formed on an inner side of the pre-shredding drum.

16. The shredder device according to claim 2, wherein the screw conveyor shaft is designed as a closed tubular body in the axial direction, and wherein the screw conveyor motor unit and the main screw motor unit are arranged on a side of the screw conveyor facing away from the shredder module.

17. The shredder device according to claim 16, wherein the feed hopper has a first and second passage opening on opposite sides through which the screw conveyor shaft and the main screw shaft are passed, wherein the shredder module is fastened on the front side around the second passage opening, and wherein the screw conveyor shaft and the main screw shaft are mounted in a common bearing block.

18. The shredder device according to claim 17, wherein within the axial direction (x) of the bearing block the screw conveyor shaft is rotatably supported by several first screw conveyor bearings with respect to the bearing block and the main screw shaft is rotatably supported by at least one first main screw bearing relative to the screw conveyor shaft, wherein the first screw conveyor bearings and the at least one first main screw bearing are designed as roller bearings, and wherein at the bearing block the screw conveyor shaft has a screw conveyor disconnection point and the main screw shaft has a main screw disconnection point.

19. The shredder device according to claim 18, wherein the bearing block is arranged on an outside of the feed hopper around the first passage opening, and wherein a centering insert is inserted into the second passage opening, in which the screw conveyor shaft is rotatably supported by a second screw conveyor bearing and the main screw shaft is rotatably supported by a second main screw bearing.

20. The shredder device according to claim 19, wherein the second screw conveyor bearing and the second main screw bearing are designed as slide bearings, and wherein the shredder module comprises a pre-shredding drum which is arranged in the axial direction (x) between the cutting drum and the second passage opening.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0029] For a better understanding, the invention is explained in more detail below with reference to four figures showing in

[0030] FIG. 1: a perspective view from behind of a shredder device cut in the longitudinal direction;

[0031] FIG. 2: a perspective side view from the front of the shredder device according to FIG. 1;

[0032] FIG. 3: an enlarged detail of a longitudinal section through the shredder device in the area of a bearing block; and

[0033] FIG. 4: an enlarged detail of a longitudinal section through the shredder device in the area of a shredder module.

DETAILED DESCRIPTION OF THE INVENTION

[0034] FIG. 1 shows a perspective view of a longitudinal section through the shredder device according to the invention, which has a machine frame 70 which is placed stationary on the floor by means of several support feet 71 attached to it. The machine frame 70 carries a feed hopper 50, which is open at the top, into which the food to be comminuted is placed, homogenized and loosened by a mixing shaft 54 running through the feed hopper 50.

[0035] At a lower end of the feed hopper 50 there is a screw conveyor 10 with which the food to be comminuted is fed to a shredder module 20. The shredder module 20 is arranged on the downstream side of the screw conveyor 10 in the axial direction x. The screw conveyor 10 comprises a screw conveyor shaft 12 and a screw conveyor flight 13, the screw conveyor shaft 12 being passed through a first passage opening 51 formed in the feed hopper 50 and being coupled to a screw conveyor motor unit 11, which can be seen particularly well in FIG. 2. In a second passage opening 52, which is arranged on the opposite side of the feed hopper 50 with respect to the first passage opening 51, the food to be comminuted enters the shredder module 20. A centering insert 63 is placed into the second passage opening 52.

[0036] The shredder module 20 has at its end a cylindrical cutting drum 30 with a plurality of radially oriented cutting openings 31 therein. In the axial direction x, the shredder module 20 is accomplished by a main screw 32 having a main screw flight 34 rotating over the cutting openings 31. By rotating the main screw 32, the main screw flight 34 pushes the food to be shredded in the direction of a discharge opening 37 through which the residues contained in the food emerge from the shredder module 20 and are removed by means of a residue chute 38.

[0037] The food to be used is relatively softer and is pressed into the cutting openings 31 due to the pressure built up by the main screw 32, held therein and sheared off due to the rotary movement of the main screw flight 34. A food discharge 39 occurs through the cutting openings 31.

[0038] The main screw 32 takes over the comminution work and has a separate main screw motor unit 35 for this purpose, which is kinematically coupled to a main screw shaft 33. The main screw shaft 33 extends in the axial direction through the shredder module 20 and is formed with the main screw flight 34 exclusively in this section. In the second passage opening 52, the main screw shaft 33 enters coaxially into the interior of the hollow screw conveyor shaft 12 and passes through it over its entire axial length. Within the feed hopper 50, the main screw shaft 33 is received by the screw conveyor shaft 12 and completely surrounded by it.

[0039] FIG. 3 illustrates in an enlarged view the passage of the screw conveyor shaft 12 and the main screw shaft 33 mounted therein through the first passage opening 51 of the feed hopper 50. A bearing block 60, which absorbs the radial and axial forces of both the screw conveyor shaft 12 and the main screw shaft 33, is arranged in alignment with the first passage opening 51 on an outside 53 of the feed hopper 50. For this purpose, the bearing block 60 has a plurality of first screw conveyor bearings 61 arranged one behind the other in the axial direction x, which act on the screw conveyor shaft 12 from the outside. The main screw shaft 33 is supported with respect to the screw conveyor shaft 12 with a first main screw bearing 62, which is also overlapped by the bearing block 60 in the axial direction x.

[0040] The screw conveyor shaft 12 is led out of the bearing block 60 on the side of the bearing block 60 facing away from the feed hopper 50 and is connected to the screw conveyor motor unit 11 shown in FIG. 2. In the exemplary embodiment shown, the screw conveyor motor unit 11 has a drive motor 11a and a power transmission means 11b in the form of a chain, into which a pinion which is fixedly formed on the screw conveyor shaft 12 engages.

[0041] The main screw shaft 33 also emerges from the bearing block 60 on the side facing away from the feed hopper 50 and projects beyond the screw conveyor shaft 12 in the axial direction x.

[0042] For simple dismantling, for example for cleaning or repair purposes, the screw conveyor 10 has a screw conveyor disconnection point 14 and the main screw 32 has a main screw disconnection point 36. The screw conveyor disconnection point 14 is formed in the immediate vicinity of the first passage opening 51 within the feed hopper 50 and is visible from above when the screw conveyor 10 is inserted into the shredder device, which considerably simplifies the insertion. The main screw disconnection point 36 is located offset in the axial direction x relative to the screw conveyor disconnection point 14 and is encompassed from the outside by the bearing block 60. The arrangement of the screw conveyor disconnection point 14 and main screw disconnection point 36 offset in the axial direction x also simplifies installation, since the screw conveyor 10 with the main screw shaft 33 inserted therein can be pushed in axially in the assembled state and contact their disconnection points 14, 36 one after the other.

[0043] FIG. 4 shows in an enlarged view the connection of the shredder module 20 to the second passage opening 52, in which the screw conveyor shaft 12 is rotatably received by means of a second screw conveyor bearing 64 carried by the centering insert 63. The second screw conveyor bearing 64 is formed from a bearing sleeve, on the outside of which the centering insert 63 and the inside of the hollow screw conveyor shaft 12 rests. The inside of the bearing sleeve forms a second main screw bearing 65 on which the outside of the main screw shaft 33 is supported.

[0044] The shredder module 20 also has a pre-shredding drum 40 which is attached to the front side of the cutting drum 30. An end of the pre-shredding drum 40 facing away from the cutting drum 30 engages the second passage opening 52 on the front side. On an inside 41, the pre-shredding drum 40 is provided with a surface made up of lands 42 and grooves 43. The grooves 43 form a spiral-like groove through the lands 42 and provide a wave-like surface. The main screw flight 34 of the section of the main screw 32 running axially through the pre-shredding drum 40 transports the food to be shredded in the direction of the cutting drum 30, with the food to be minced being pre-shredded at the lands 42 and grooves 43.

LIST OF REFERENCE NUMBERS

[0045] 10 screw conveyor [0046] 11 screw conveyor motor unit [0047] 11a drive motor [0048] 11b power transmission means [0049] 12 screw conveyor shaft [0050] 13 screw conveyor flight [0051] 14 screw conveyor disconnection point [0052] 20 shredder module [0053] 30 cutting drum [0054] 31 cutting openings [0055] 32 main screw [0056] 33 main screw shaft [0057] 34 main screw flight [0058] 35 main screw motor unit [0059] 36 main screw disconnection point [0060] 37 discharge opening for residues [0061] 38 residue chute [0062] 39 food discharge [0063] 40 pre-shredding drum [0064] 41 inside of the pre-shredding drum [0065] 42 lands [0066] 43 grooves [0067] 50 feed hopper [0068] 51 first passage opening [0069] 52 second passage opening [0070] 53 outside feed hopper [0071] 54 mixing shaft [0072] 60 bearing block [0073] 61 first screw conveyor bearing [0074] 62 first main screw bearing [0075] 63 centering insert [0076] 64 second screw conveyor bearing [0077] 65 second main screw bearing [0078] 70 machine frame [0079] 71 support feet [0080] x axial direction