Threshing concave plate, threshing mechanism and combine harvester

Abstract

A threshing concave plate (1), a threshing mechanism and a combine harvester. The threshing concave plate (1) is provided with a feeding port (101), wherein a feeding baffle (2) is further fixed to an upper side of the feeding port (101). The threshing mechanism comprises a roller (4) and the threshing concave plate (1). The combine harvester comprises the threshing mechanism.

Description

Threshing concave plate, threshing mechanism and combine harvester Technical Field

[0001] The utility model relates to the field of threshing concave plates, in particular to a threshing concave plate, a threshing mechanism and a combine harvester. Background Art

[0002] Currently, horizontal-axis flow harvesters are prone to clogging at the bridge and concave plate inlet (i.e., the feed port of the threshing mechanism) during harvesting, especially when harvesting relatively wet crops. This problem is primarily caused by weeds flowing through this area. On existing harvesters, the concave plate inlet is simply a rectangular channel, which does not effectively prevent weeds from flowing through.

[0003] Utility Model Content

[0004] The technical problem to be solved by the utility model is how to prevent grass from turning back at the concave plate inlet.

[0005] The utility model solves the above technical problems with the following technical solutions: a threshing concave plate, the threshing concave plate has a concave plate inlet, and a feed baffle is fixed on the upper side of the concave plate inlet.

[0006] The beneficial effects of this utility model include the addition of a feed baffle at the concave inlet, which blocks material from being carried back by the bridge conveyor mechanism in front, thereby preventing it from being carried back by the bridge conveyor mechanism and forming back-straw. The feed baffle is positioned above the material flow path, thus maintaining its position without affecting the entry of material into the threshing concave and preventing material within the threshing concave from returning back across the bridge. The feed baffle is fixed to the threshing concave, simplifying the structure and strengthening the threshing concave.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the feed baffle is vertically arranged, and a plurality of baffle teeth are provided on its lower edge.

[0009] The beneficial effect of adopting this further solution is that, in the bridge conveying mechanism, the outer end of the chain rake is typically serrated to increase the gripping power of the chain rake. However, at the connection between the bridge and the threshing mechanism, the chain rake teeth easily snag the material, preventing it from slipping out. This is especially true for wet crops, whose stalks are soft and tough, making them more difficult to slip out. If the feed baffle were a conventional rectangular plate, its grip would be poor, making it difficult to catch the material between the chain rake teeth, resulting in relatively poor anti-weeding effect. The feed baffle teeth in this solution provide a higher gripping power for the material and better anti-weeding effect.

[0010] Furthermore, the longitudinal middle portion of the feed baffle bulges backward, or the threshing concave plate further includes a bending plate, which is fixed to the rear side of the feed baffle, and the longitudinal middle portion of the bending plate bulges backward.

[0011] The beneficial effect of adopting the above further scheme is: setting the middle part of the bent plate or the feed baffle to bulge backward, firstly, it plays a reinforcing role to prevent the feed baffle from deforming, and secondly, the backward convex surface can guide the material in the threshing concave plate, and can guide the material above the drum to the drum to prevent the material from re-entering the bridge.

[0012] Furthermore, both sides of the upper end of the threshing concave are bent forward or backward respectively.

[0013] The above-mentioned further solution has the following advantages: Existing threshing concave plates are mostly arc-shaped, requiring multiple mounting brackets to be welded to their edges before being secured to the frame. This makes it difficult to ensure the coplanarity and position of the mounting brackets. In this solution, the upper end of the threshing concave plate is bent to form a flange that can be directly secured to the frame, eliminating the need for mounting brackets and simplifying assembly.

[0014] The utility model also provides a threshing mechanism, comprising a roller and the threshing concave plate, wherein the roller is rotatably installed in the threshing concave plate.

[0015] The beneficial effects are: the feed baffle prevents weeds from turning back, the drum rotates around its own axis, and cooperates with the threshing concave plate to realize threshing.

[0016] The utility model also provides a combine harvester, comprising the threshing mechanism.

[0017] Furthermore, it also includes a bridge conveying mechanism, and the discharge end of the bridge conveying mechanism is located in front of the concave plate inlet.

[0018] Furthermore, the bridge conveying mechanism includes a conveying chain and a plurality of chain rakes, and the plurality of chain rakes are fixed on the conveying chain at intervals.

[0019] The beneficial effect of adopting the above further solution is that the conveyor chain drives multiple chain rakes to move, and brings and throws the materials into the concave plate inlet. The materials hanging on the chain rakes are scraped off by the feed baffle, fall into the threshing concave plate, and are taken away by the roller.

[0020] Furthermore, the chain rake has a plurality of chain rake teeth, and the plurality of chain rake teeth are arranged in an alternating manner with the plurality of baffle teeth of the feed baffle.

[0021] The beneficial effect of this further solution is that the chain rake teeth increase the chain rake's ability to grab material. Each chain rake tooth corresponds to the recessed area between two adjacent baffle teeth, effectively grabbing material that bounces up between the chain rake teeth. Material caught by the baffle teeth is quickly removed by the roller, achieving a better anti-weed effect.

[0022] Furthermore, the minimum distance between the feed baffle and the chain rake is less than or equal to 50 mm; the minimum distance between the feed baffle and the drum is greater than the threshing gap and less than or equal to 50 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional diagram of the threshing concave plate of the present invention;

[0024] Figure 2 is a front view of the feed baffle of the present invention;

[0025] FIG3 is a left side view of one type of feed baffle of the present invention;

[0026] FIG4 is a left side view of another feed baffle of the present invention;

[0027] FIG5 is a cross-sectional view of the combine harvester of the present invention, showing only the relevant structure near the concave plate inlet;

[0028] FIG6 is a partial enlarged view of the concave plate inlet in FIG5;

[0029] Figure 7 is a front view of the chain rake of the present invention;

[0030] FIG8 is a left side view of the chain rake of FIG7 .

[0031] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0032] 1. Threshing concave; 101. Concave inlet; 2. Feed baffle; 3. Bending plate; 4. Roller; 5. Bridge conveying mechanism; 501. Conveyor chain; 502. Chain rake. DETAILED DESCRIPTION

[0033] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0034] As shown in FIG. 1 to FIG. 4 , this embodiment provides a threshing concave. The threshing concave 1 has a concave inlet 101 , and a feed baffle 2 is fixed on the upper side of the concave inlet 101 .

[0035] A feed baffle 2 is installed at the concave inlet 101. It blocks material from being carried back by the bridge conveyor 5, preventing it from being carried back by the bridge conveyor 5 and causing back-flow. Positioned above the material flow path, the feed baffle 2 maintains its position without affecting material entering the threshing concave 1 while preventing material from returning back across the bridge. Attaching the feed baffle 2 to the threshing concave 1 simplifies the structure while also strengthening the threshing concave 1.

[0036] Specifically, the feed baffle 2 is a strip-shaped plate, and the feed baffle 2 is arranged horizontally.

[0037] The feed baffle 2 can be a flat plate or a plate with a bent structure. Its lower edge can be a straight edge or a serrated shape.

[0038] On the basis of the above technical solution, as shown in FIG2 , the feed baffle 2 is vertically arranged, and a plurality of baffle teeth are provided on its lower edge.

[0039] In the bridge conveyor mechanism 5, the outer end of the chain rake 502 is typically serrated to enhance its gripping power. However, at the junction of the bridge and the threshing mechanism, the chain rake 502's teeth easily snag on the material, preventing it from slipping out. This is especially true for wet crops, whose stalks are soft and resilient, making them more difficult to slip out. If the feed baffle 2 were a conventional rectangular plate, its gripping power would be poor, making it difficult to capture material between the chain rake teeth, resulting in relatively poor anti-weeding effectiveness. The feed baffle 2 of this embodiment, with its teeth, provides greater gripping power and improved anti-weeding effectiveness.

[0040] Optionally, as shown in FIG2 , a plurality of grooves are provided on the lower edge of the feed baffle 2. The grooves are rectangular, triangular, arc-shaped, or other shapes, and baffle teeth are formed between adjacent grooves, that is, the baffle teeth are integrally formed with the feed baffle 2. Alternatively, the baffle teeth are separately processed and fixedly connected to the feed baffle 2, and the baffle teeth can be rod-shaped or plate-shaped.

[0041] On the basis of the above technical solution, the longitudinal middle part of the feed baffle 2 bulges backward, or the threshing concave 1 further includes a bending plate 3, which is fixed to the rear side of the feed baffle 2, and the longitudinal middle part of the bending plate 3 bulges backward.

[0042] The middle part of the bending plate 3 or the feed baffle 2 is convex backward. First, it plays a reinforcing role to prevent the feed baffle 2 from being deformed. Second, the backward convex surface can guide the material in the threshing concave 1, and can guide the material above the drum 4 to the drum 4 to prevent the material from re-entering the bridge.

[0043] On the basis of the above technical solution, both sides of the upper end of the threshing concave 1 are bent forward or backward respectively.

[0044] Most of the existing threshing concave plates 1 are in the shape of circular arc plates, and need to be welded with multiple mounting seats at the edges, and then fixed to the frame through the mounting seats. The coplanarity and position of the mounting seats are difficult to ensure.

[0045] In this solution, the upper end of the threshing concave plate 1 is bent to form a flange, and the flange can be directly fixed to the frame without installing a mounting base, which is simple to assemble.

[0046] Specifically, the threshing concave plate 1 is shaped like an arc plate with a central angle of 180 degrees in the middle, with both ends bent outward for installation on the frame. The arc axis of the threshing concave plate 1 is arranged in the left-right direction, and the concave plate inlet 101 is provided on the front side of the threshing concave plate 1, which is applied to a transverse axial flow combine harvester.

[0047] This embodiment further provides a threshing mechanism, comprising a drum 4 and the threshing concave plate, wherein the drum 4 is rotatably mounted in the threshing concave plate 1 .

[0048] The feed baffle 2 prevents weeds from turning back, and the drum 4 rotates around its own axis and cooperates with the threshing concave plate 1 to achieve threshing.

[0049] 5 and 6 , the rotation axis of the drum 4 is parallel to the axis of the threshing concave 1 . The feed baffle 2 is located above and in front of the drum 4 .

[0050] As shown in FIG. 1 to FIG. 8 , this embodiment further provides a combine harvester including the threshing mechanism.

[0051] Specifically, the combine harvester further includes a frame, and the threshing concave plate 1 is fixed on the frame.

[0052] On the basis of the above technical solution, the combine harvester further comprises a bridge conveying mechanism 5 , and a discharging end of the bridge conveying mechanism 5 is located in front of the concave plate inlet 101 .

[0053] Specifically, the bridge includes a bridge conveying mechanism 5 and a bridge housing. The bridge conveying mechanism 5 is installed in the bridge housing, and the rear end of the bridge housing is connected to the concave plate inlet 101.

[0054] On the basis of the above technical solution, the bridge conveying mechanism 5 includes a conveying chain 501 and a plurality of chain rakes 502 , and the plurality of chain rakes 502 are fixed on the conveying chain 501 at intervals.

[0055] The conveyor chain 501 drives multiple chain rakes 502 to move, and brings and throws the materials into the concave plate inlet 101. The materials hung on the chain rakes 502 are scraped off by the feed baffle 2, fall into the threshing concave plate 1, and are taken away by the roller 4.

[0056] On the basis of the above technical solution, the chain rake 502 has a plurality of chain rake teeth, and the plurality of chain rake teeth are arranged in an alternating manner with the plurality of baffle teeth of the feed baffle 2 .

[0057] The chain rake teeth increase the material grabbing ability of the chain rake 502. Each chain rake tooth corresponds to the recessed portion between two adjacent baffle teeth, which can effectively grab the material that is reversed between the chain rake teeth. The material caught by the baffle teeth will be quickly taken away by the roller 4, thereby achieving a better anti-weed effect.

[0058] Optionally, as shown in Figures 7 and 8, the chain rake 502 is provided with a plurality of grooves in rectangular, triangular, arc-shaped, or other shapes, with chain rake teeth formed between adjacent grooves, i.e., the chain rake teeth are integrally formed with the chain rake 502. Alternatively, the chain rake teeth and the chain rake 502 are separately processed and fixedly connected, and the chain rake teeth can be rod-shaped or plate-shaped.

[0059] On the basis of the above technical solution, the minimum distance between the feed baffle 2 and the chain rake 502 is less than or equal to 50 mm; the minimum distance between the feed baffle 2 and the drum 4 is greater than the threshing gap and less than or equal to 50 mm.

[0060] In other words, the feed baffle 2 is arranged above the trajectory of the chain rake 502 and the movement trajectory of the threshing teeth of the drum 4. The distance between the feed baffle 2 and the movement trajectory of the threshing teeth of the drum is greater than the threshing gap, but not greater than 50 mm. The feed baffle 2 is not greater than 50 mm away from the movement trajectory of the chain rake 502 and does not interfere with the bridge housing.

[0061] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0062] In the description of the present invention, “a plurality of” means at least two, such as two, three, etc., unless otherwise clearly defined.

[0063] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0065] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A threshing concave, the threshing concave (1) having a concave inlet (101), characterized in that: A feed baffle (2) is also fixed on the upper side of the concave plate inlet (101).

2. A threshing concave according to claim 1, characterized in that: The feed baffle (2) is arranged vertically, and has a plurality of baffle teeth on its lower edge.

3. A threshing concave according to claim 1, characterized in that: The threshing concave plate (1) further comprises a bending plate (3), wherein the bending plate (3) is fixed to the rear side of the feed baffle (2), and the middle part of the bending plate (3) protrudes backwards in the longitudinal direction, or the middle part of the feed baffle (2) protrudes backwards in the longitudinal direction.

4. A threshing concave according to any one of claims 1 to 3, characterized in that: The upper end of the threshing concave plate (1) is bent outward.

5. A threshing mechanism, characterized in that: It comprises a roller (4) and a threshing concave according to any one of claims 1 to 4, wherein the roller (4) is rotatably mounted on the inner side of the threshing concave (1).

6. A combine harvester, characterized in that: It comprises the threshing mechanism as claimed in claim 5.

7. A combine harvester according to claim 6, characterized in that: It also includes a bridge conveying mechanism (5), the discharge end of the bridge conveying mechanism (5) is located in front of the concave plate inlet (101), and the bridge conveying mechanism (5) includes a conveying chain (501) and a plurality of chain rakes (502), and the plurality of chain rakes (502) are fixed on the conveying chain (501) at intervals.

8. A combine harvester according to claim 7, characterized in that: The chain rake (502) has a plurality of chain rake teeth.

9. A combine harvester according to claim 8, characterized in that: The plurality of chain rake teeth and the plurality of baffle teeth of the feed baffle (2) are arranged in an alternating manner.

10. A combine harvester according to any one of claims 7 to 9, characterized in that: The minimum distance between the feed baffle (2) and the chain rake (502) is less than or equal to 50 mm; the minimum distance between the feed baffle (2) and the roller (4) is greater than the threshing gap and less than or equal to 50 mm.

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