Threshing concave assembly and combine harvester

Abstract

The utility model relates to a threshing concave plate assembly and combine harvester relate to agricultural machinery technical field, wherein, a kind of threshing concave plate assembly, comprising: concave plate frame, it is fixedly installed, and overall is circular arc structure, the concave plate frame is opened with the concave plate assembly space that opens towards the center axis place, the concave plate assembly space has installation slot;Concave plate, from the installation slot insertion concave plate assembly space, and detachably connect in the concave plate frame.The utility model is convenient for realizing to the quick release quick change of concave plate, can guarantee the high efficiency of harvesting operation.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a threshing concave plate assembly and a combine harvester. Background Technology

[0002] With the promotion of agricultural land use models based on land transfer, arable land is beginning to show signs of large-scale and standardized development. This has led to a demand in the agricultural machinery market for mid-to-high-end harvesting machinery. Farmers are now seeking large-scale harvesting machines that are highly efficient, have low failure rates, are automated and intelligent, and offer comfortable and reliable operation. Taking the Chinese market as an example, there is a requirement for grain combine harvesters to be adaptable to various regions, including Northeast, North, Central Plains, and Northwest China, capable of harvesting crops such as corn, wheat, beans, miscellaneous grains, sunflowers, and rapeseed.

[0003] Grain combine harvesters mainly employ six technical approaches: single longitudinal axial flow, double longitudinal axial flow, tangential flow + single longitudinal axial flow, tangential flow + double longitudinal axial flow, tangential flow + keyed straw collector, and transverse axial flow. Axial flow drums, tangential flow drums, and their corresponding concave plates are core functional components of the harvesting machinery. When switching the type of crop being harvested, replacing the corresponding concave plate is the most crucial adjustment step. The tangential flow drum concave plate is arranged transversely along the entire machine, with its front and rear ends located within the harvester's threshing chamber, leaving no space for replacement. Furthermore, most tangential flow concave plates are currently integrated, requiring the disassembly of large components such as the header, bridge, drive wheels, and stone collection trough before replacing the entire tangential flow concave plate. This process is extremely complex, requiring forklifts, jacks, and at least four workers, taking approximately 5-10 hours, resulting in a very large workload and high time and labor costs.

[0004] Therefore, how to achieve quick disassembly and replacement of the tangential concave plate in existing technologies to ensure high harvesting efficiency is a pain point that grain combine harvester users urgently need to address. Utility Model Content

[0005] This utility model provides a threshing concave plate assembly and a combine harvester, which facilitates quick disassembly and replacement of the concave plate and ensures high efficiency in harvesting operations.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a threshing concave plate assembly, comprising: A concave plate frame is fixedly installed and has an overall arc-shaped structure. The concave plate frame has a concave plate assembly space that opens towards its central axis and has an installation groove. A recessed plate, which is inserted into the recessed plate assembly space from the mounting slot and is detachably connected to the recessed plate frame.

[0007] The beneficial effects of this utility model are: when different crops need to be harvested and the concave plate needs to be replaced, the concave plate can be removed from the mounting slot and then the concave plate to be replaced can be inserted into the concave plate assembly space from the mounting slot, so as to complete the quick removal and replacement of the concave plate and ensure the high efficiency of the harvesting operation.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the concave plate frame includes a first side plate, a second side plate, two third side plates, and multiple longitudinal partitions. The first side plate and the second side plate are both arc-shaped and arranged parallel to each other. The two third side plates are arranged parallel to each other and spaced apart, and are both perpendicular to the first side plate. The two ends of one third side plate are respectively fixedly connected to one end of the first side plate and one end of the second side plate, and the two ends of the other third side plate are respectively fixedly connected to the other end of the first side plate and the second side plate. The multiple longitudinal partitions are spaced apart between the first side plate and the second side plate, and their two ends are respectively fixedly connected to the two third side plates. The fixing frame is simultaneously fixedly connected to the first side plate, the second side plate, and one of the third side plates. The first side plate, the second side plate, the two third side plates, and each longitudinal partition together form the concave plate assembly space. The concave plate is detachably connected to the first side plate and the second side plate.

[0010] Furthermore, it also includes a plurality of fasteners distributed on the first side plate and the second side plate, each of the fasteners including a bolt that is simultaneously inserted into the concave plate and a nut that is threadedly connected to the bolt, and each of the bolts is also inserted into the first side plate or the second side plate.

[0011] Furthermore, the first side plate or the second side plate forms the mounting groove by having an axial through opening along the concave frame.

[0012] Furthermore, the mounting groove opens toward the central axis of the concave plate frame, and the chord length of the opening of the mounting groove toward the central axis of the concave plate frame is smaller than the chord length of its bottom. The concave plate is adapted to and inserted into the mounting groove along the axial direction of the concave plate frame.

[0013] Furthermore, each nut close to the mounting groove is fixedly connected to the first side plate or the second side plate corresponding to the mounting groove, and each nut away from the mounting groove is fixedly connected to the concave plate.

[0014] Furthermore, the bottom of the mounting groove is provided with multiple limiting grooves spaced apart, each of the limiting grooves opening towards the axial outer side of the concave plate frame, and the concave plate is fixedly connected with multiple limiting blocks that are adapted to and inserted into each of the limiting grooves.

[0015] Furthermore, the concave plate frame also includes at least one fixed frame. The fixed frame includes multiple spaced first transverse partitions and multiple spaced first through strips. The two ends of each first transverse partition are fixedly connected to the first side plate and the second side plate, respectively. Each first through strip is detachably connected to each first transverse partition. The first side plate, the second side plate, each longitudinal partition, the fixed frame, and the opposite third side plate together form the concave plate assembly space.

[0016] Furthermore, the concave plate includes a fourth side plate, a fifth side plate, multiple second transverse partitions, and multiple second through strips. The fourth side plate and the fifth side plate are both arc-shaped and arranged parallel to each other. The second transverse partitions are parallel to each other and spaced apart. The two ends of each second transverse partition are fixedly connected to the fourth side plate and the fifth side plate, respectively. Each second through strip is arc-shaped, parallel to each other and spaced apart. Each second through strip is fixedly connected to each second transverse partition.

[0017] This utility model also provides a combine harvester, including the aforementioned threshing concave plate assembly. Attached Figure Description

[0018] Figure 1 This is an installation structure diagram of the threshing concave plate assembly of this utility model; Figure 2 For the present utility model Figure 1 Enlarged view of section A in the middle; Figure 3 For the present utility model Figure 1 Enlarged view of section B; Figure 4 For the present utility model Figure 1 Side view; Figure 5 This is a structural diagram of the concave plate frame of this utility model; Figure 6 For the present utility model Figure 5 Enlarged view of section C; Figure 7 This is a structural diagram of the concave plate of this utility model.

[0019] The attached diagram lists the components represented by each number as follows: 1. Concave frame; 11. First side plate; 12. Second side plate; 13. Third side plate; 14. Longitudinal diaphragm; 15. Fixed frame; 151. First transverse diaphragm; 152. First through strip; 2. Mounting slot; 21. Limiting slot; 22. Limiting block; 3. Concave plate; 31. Fourth side plate; 32. Fifth side plate; 33. Second transverse diaphragm; 34. Second through strip; 4. Fasteners; 41. Bolts; 42. Nuts. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] This utility model provides a threshing concave plate assembly, such as Figures 1-7 ,include: The concave frame 1 is fixedly installed and has an overall arc-shaped structure. The concave frame 1 has a concave assembly space with an opening facing its central axis. The concave assembly space has an installation groove 2. The concave plate 3 is inserted into the concave plate assembly space by self-mounting groove 2 and is detachably connected to the concave plate frame 1.

[0022] By adopting this detachable concave plate assembly, when different crops need to be harvested and the concave plate 3 needs to be replaced, simply remove the concave plate 3 from the mounting slot 2, and then insert the concave plate 3 to be replaced into the concave plate assembly space from the mounting slot 2. This allows for quick removal and replacement of the concave plate 3, ensuring high efficiency in harvesting operations.

[0023] The concave plate 3 is provided with at least one piece. Specifically, it can be provided with one, two, three, or four pieces as needed. Two pieces are shown in the figure. When there are multiple pieces, the ends of the multiple concave plates 3 abut against each other to fill the concave plate assembly space at the same time.

[0024] The concave frame 1 has through holes at all four corners for bolt assembly and connection with the whole machine to achieve fixed installation.

[0025] The concave frame 1 includes a first side plate 11, a second side plate 12, two third side plates 13, and multiple longitudinal partitions 14. The first side plate 11 and the second side plate 12 are both arc-shaped and arranged parallel to each other. The two third side plates 13 are arranged parallel to each other and spaced apart, and are both perpendicular to the first side plate 11. The two ends of one third side plate 13 are respectively fixedly connected to one end of the first side plate 11 and the second side plate 12, and the two ends of the other third side plate 13 are respectively fixedly connected to the first side plate 11 and the second side plate 12. At the other end of 12, multiple longitudinal partitions 14 are spaced apart between the first side plate 11 and the second side plate 12, and their two ends are fixedly connected to two third side plates 13 respectively. The fixed frame 15 is fixedly connected to the first side plate 11, the second side plate 12 and one of the third side plates 13. The first side plate 11, the second side plate 12, the two third side plates 13 and each longitudinal partition 14 together form a concave plate assembly space. The concave plate 3 is detachably connected to the first side plate 11 and the second side plate 12.

[0026] When it is necessary to replace a different type of concave plate 3, simply disconnect the concave plate 3 to be replaced from the first side plate 11 and the second side plate 12, and the concave plate 3 to be replaced can be removed. Then, insert the concave plate 3 to be installed into the mounting slot 2. The disassembly and assembly are convenient and quick.

[0027] The first side plate 11 or the second side plate 12 forms a mounting groove 2 by opening through the axial direction of the recessed frame 1. In the installed state, the first side plate 11 and the second side plate 12 are arranged along the lateral direction of the whole machine, that is, perpendicular to the direction of travel. The axial direction of the recessed plate 3 extends along the lateral direction of the whole machine. When replacement is required, the recessed plate 3 can be pulled out from the lateral direction of the whole machine to perform the replacement operation, which is convenient for disassembly and assembly. The mounting groove 2 is opened in the first side plate 11 or the second side plate 12, so that the first side plate 11 or the second side plate 12 opposite to the mounting groove 2 can form a blocking and first limiting effect on the recessed plate 3 inserted along the lateral direction of the whole machine, ensuring that the recessed plate 3 is inserted and installed in place.

[0028] The figure shows that the mounting slot 2 is opened in the second side plate 12.

[0029] Furthermore, the bottom of the mounting groove 2 is provided with multiple limiting grooves 21 spaced apart. Each limiting groove 21 opens towards the axial outer side of the concave plate frame 1, and the concave plate 3 is fixedly connected with multiple limiting blocks 22 that are adapted to and inserted into each limiting groove 21.

[0030] When the concave plate 3 is axially inserted into the mounting groove 2 to fill the concave plate assembly space, the limiting block 22 is simultaneously filled into the limiting groove 21. The limiting groove 21 forms a second limiting effect on the limiting block 22 to ensure the stable installation of the concave plate 3.

[0031] Based on the above embodiments, the concave plate frame 1 further includes at least one fixed frame 15. The fixed frame 15 includes multiple spaced first transverse partitions 151 and multiple spaced first through strips 152. The two ends of each first transverse partition 151 are fixedly connected to the first side plate 11 and the second side plate 12, respectively. Each first through strip 152 is simultaneously detachably connected to one of the third side plates 13 and each of the first transverse partitions 151. The first side plate 11, the second side plate 12, each longitudinal partition 14, the fixed frame 15, and the opposite third side plate 13 together form a concave plate assembly space.

[0032] During harvesting, multiple spaced-apart first transverse partitions 151 and multiple spaced-apart first threading strips 152 together form a fixed frame 15, serving as a universal fixed frame for different types of threshing concave plate assemblies. Only the concave plate 3 needs to be replaced. The reason for using this fixed frame 15 is that, in terms of area, after replacing the concave plate 3, the concave plate 3 and the fixed frame 15 together form the new concave plate assembly required for the operation, which can relatively reduce the area that the concave plate 3 needs to replace, and thus relatively reduce the workload.

[0033] As one of the parallel solutions, only one fixed frame 15 is provided, and the fixed frame 15 is located at the end of the concave frame 1, and is simultaneously fixedly connected to the first side plate 11, the second side plate 12, and one of the third side plates 13. At this time, the first side plate 11, the second side plate 12, the other third side plate 13, each longitudinal partition plate 14, and the first transverse partition plate 151 opposite to the other third side plate 13 together form a concave assembly space.

[0034] As a second parallel solution, only one fixed frame 15 is provided, and the fixed frame 15 is located in the middle of the concave plate frame 1, and is fixedly connected to both the first side plate 11 and the second side plate 12. In this case, by separating the fixed frame 15, two concave plate assembly spaces are formed.

[0035] As a third parallel option, only two fixed frames 15 are provided, and the two fixed frames 15 are located at the two ends of the concave frame 1 respectively (e.g. Figure 6 At this point, both fixed frames 15 are simultaneously fixedly connected to the first side plate 11 and the second side plate 12, and are also fixedly connected to the two third side plates 13 respectively. At this point, the first side plate 11, the second side plate 12, the other third side plate 13, each longitudinal partition plate 14, and the two fixed frames 15 together form a concave plate assembly space.

[0036] As a fourth parallel arrangement, only two fixing frames 15 are provided, with one fixing frame 15 located at the end of the concave plate frame 1 and the other fixing frame 15 located in the middle of the concave plate frame 1. In this case, the separation of the two fixing frames 15 forms two concave plate assembly spaces.

[0037] As other parallel solutions, the fixed frame 15 is provided with at least three, and is distributed in a manner such as parallel solution two / three / four, or a combination of multiple methods, to form multiple concave plate assembly spaces.

[0038] like Figure 7 In this embodiment of the present invention, the concave plate 3 includes a fourth side plate 31, a fifth side plate 32, multiple second transverse partitions 33, and multiple second through strips 34. The fourth side plate 31 and the fifth side plate 32 are both arc-shaped and arranged parallel to each other. The second transverse partitions 33 are parallel to each other and spaced apart. The two ends of each second transverse partition 33 are fixedly connected to the fourth side plate 31 and the fifth side plate 32, respectively. The second through strips 34 are all arc-shaped and arranged parallel to each other and spaced apart. Each second through strip 34 is fixedly connected to each second transverse partition 33.

[0039] When in use, the combined action of the roller's impact, kneading, and squeezing completes the removal of crops through the gaps formed by the fourth side plate 31, the fifth side plate 32, multiple second transverse partitions 33, and multiple second through strips 34.

[0040] like Figures 5-7 The threshing concave plate assembly of this utility model also includes a plurality of fasteners 4 distributed on the first side plate 11 and the second side plate 12. Each fastener 4 includes a bolt 41 that is simultaneously inserted into the concave plate 3 and a nut 42 threadedly connected to the bolt 41. Each bolt 41 is also inserted into the first side plate 11 or the second side plate 12. When it is necessary to remove and replace the concave plate 3, it is only necessary to unscrew the bolt 41 to quickly complete the disassembly and replacement.

[0041] Based on the above embodiments, multiple first insertion holes are provided through the first side plate 11 and the second side plate 12 of the concave plate frame 1, and multiple second insertion holes are provided through the fourth side plate 31 and the fifth side plate 32 of the concave plate 3. Each first insertion hole can communicate with each second insertion hole to allow the insertion of the rod of each bolt 41.

[0042] Based on the above technical solution, the opening of the mounting groove 2 will be specifically described below.

[0043] Example 1 like Figure 5 and Figure 6 A threshing concave plate assembly, wherein the mounting groove 2 is open toward the central axis of the concave plate frame 1, and the chord length of the opening of the mounting groove 2 toward the central axis of the concave plate frame 1 is smaller than the chord length of its bottom. The concave plate 3 is adapted and inserted into the mounting groove 2 along the axial direction of the concave plate frame 1.

[0044] The groove wall of the mounting groove 2 forms a limiting effect on the insertion of the concave plate 3, ensuring that the concave plate 3 will not shake or move in other directions during the installation process and when it is installed in place; after the concave plate 3 is installed in place, the concave plate 3 can be installed on the concave plate frame 1 by fastener 4.

[0045] Specifically, the mounting groove 2 can be a dovetail groove structure or a stepped groove structure; the figure shows a dovetail groove structure. The dovetail groove wall limits the movement of the recessed plate 3, preventing it from detaching from the recessed plate frame 1 along its axis.

[0046] This application applies to a combine harvester in which the tangential flow drum concave plate is arranged laterally along the whole machine. Therefore, when installing the concave plate 3, the concave plate 3 can be installed along the lateral direction of the whole machine.

[0047] In this embodiment 1, each nut 42 close to the mounting groove 2 is fixedly connected to the first side plate 11 or the second side plate 12 corresponding to the mounting groove 2, and each nut 42 away from the mounting groove 2 is fixedly connected to the concave plate 3.

[0048] When inserting the mounting recess 3 along the side of the whole machine, the end of the recess 3 with the nut 42 fixed on it is the first to be inserted into the front end of the mounting groove 2, and is quickly installed in place away from the obstruction of the first side plate 11 or the second side plate 12 of the mounting groove 2. After that, tighten each bolt 41 in place.

[0049] As one of the parallel solutions, when the mounting groove 2 is opened on the second side plate 12, the nuts 42 of each fastener 4 located on the first side plate 11 are fixedly connected to the concave plate 3, while the other nuts 42 are fixedly connected to the inner side of the second side plate 12.

[0050] As a second parallel solution, when the mounting groove 2 is opened on the first side plate 11, the nuts 42 of each fastener 4 located on the first side plate 11 are fixedly connected to the first side plate 11, while the other nuts 42 are fixedly connected to the concave plate 3.

[0051] Example 2 The difference between Embodiment 2 and Embodiment 1 is that the mounting groove 2 opens towards the central axis of the concave plate frame 1, and the chord length of the opening of the mounting groove 2 towards the central axis of the concave plate frame 1 is equal to the chord length of its bottom, forming a "U"-shaped groove structure. When it is necessary to disassemble the concave plate 3, loosen the fastener 4, lift the concave plate 3 towards the central axis of the concave plate frame 1, causing the concave plate 3 to disengage from the concave plate assembly space of the concave plate frame 1. Then, pull the concave plate 3 out of the space between the concave plate frame 1 and the tangential roller to complete the disassembly of the concave plate 3. The installation of other concave plates 3 is completed by using the reverse steps.

[0052] It should be noted that, at this time, the thickness of the concave plate 3 is less than the gap between the concave plate 3 and the roller.

[0053] Based on the above scheme, mounting grooves 2 are provided on both the first side plate 11 and the second side plate 12, and the two mounting grooves open towards each other to receive the fourth side plate 31 and the fifth side plate 32 of the concave plate 3 respectively.

[0054] This utility model also provides a combine harvester, which includes the above-mentioned threshing concave plate assembly.

[0055] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A threshing concave plate assembly, characterized in that, include: The concave frame (1) is fixedly installed and has an overall arc-shaped structure. The concave frame (1) has a concave assembly space with an opening facing its central axis. The concave assembly space has an installation groove (2). A concave plate (3) is inserted into the concave plate assembly space from the mounting groove (2) and is detachably connected to the concave plate frame (1).

2. The threshing concave plate assembly according to claim 1, characterized in that, The concave frame (1) includes a first side plate (11), a second side plate (12), two third side plates (13), and multiple longitudinal partitions (14). The first side plate (11) and the second side plate (12) are both arc-shaped and arranged parallel to each other. The two third side plates (13) are arranged parallel to each other and spaced apart, and are both perpendicular to the first side plate (11). The two ends of one of the third side plates (13) are respectively fixedly connected to one end of the first side plate (11) and the second side plate (12), and the two ends of the other third side plate (13) are respectively fixedly connected to one end of the first side plate (11) and the second side plate (12). The ends are respectively fixedly connected to the other ends of the first side plate (11) and the second side plate (12). Multiple longitudinal partitions (14) are spaced apart between the first side plate (11) and the second side plate (12), and their two ends are respectively fixedly connected to two third side plates (13). The first side plate (11), the second side plate (12), the two third side plates (13) and each longitudinal partition (14) together form the concave plate assembly space. The concave plate (3) is detachably connected to the first side plate (11) and the second side plate (12).

3. The threshing concave plate assembly according to claim 2, characterized in that, It also includes a plurality of fasteners (4) distributed on the first side plate (11) and the second side plate (12), each of the fasteners (4) including a bolt (41) that is simultaneously inserted into the concave plate (3) and a nut (42) threaded to the bolt (41), each of the bolts (41) being inserted into the first side plate (11) or the second side plate (12).

4. The threshing concave plate assembly according to claim 3, characterized in that, The first side plate (11) or the second side plate (12) forms the mounting groove (2) by opening through the concave frame (1) along the axial direction.

5. The threshing concave plate assembly according to claim 4, characterized in that, The mounting groove (2) opens toward the central axis of the concave frame (1), and the chord length of the opening of the mounting groove (2) toward the central axis of the concave frame (1) is smaller than the chord length of its bottom. The concave plate (3) is adapted to and inserted into the mounting groove (2) along the axial direction of the concave frame (1).

6. The threshing concave plate assembly according to claim 5, characterized in that, Each nut (42) near the mounting groove (2) is fixedly connected to the first side plate (11) or the second side plate (12) corresponding to the mounting groove (2), and each nut (42) away from the mounting groove (2) is fixedly connected to the concave plate (3).

7. The threshing concave plate assembly according to claim 4, characterized in that, The bottom of the mounting groove (2) is provided with multiple limiting grooves (21) spaced apart. Each limiting groove (21) opens towards the axial outer side of the concave plate frame (1), and the concave plate (3) is fixedly connected with multiple limiting blocks (22) that are adapted to and inserted into each limiting groove (21).

8. The threshing concave plate assembly according to claim 2, characterized in that, The concave plate frame (1) further includes at least one fixed frame (15), the fixed frame (15) includes multiple spaced first transverse partitions (151) and multiple spaced first through strips (152), the two ends of each first transverse partition (151) are fixedly connected to the first side plate (11) and the second side plate (12) respectively, and each first through strip (152) is detachably connected to each first transverse partition (151). The first side plate (11), the second side plate (12), each longitudinal partition (14), the fixed frame (15) and the opposite third side plate (13) together form the concave plate assembly space.

9. A threshing concave plate assembly according to any one of claims 1-8, characterized in that, The concave plate (3) includes a fourth side plate (31), a fifth side plate (32), multiple second transverse partitions (33), and multiple second through strips (34). The fourth side plate (31) and the fifth side plate (32) are both arc-shaped and arranged parallel to each other. Each second transverse partition (33) is parallel to each other and spaced apart. The two ends of each second transverse partition (33) are fixedly connected to the fourth side plate (31) and the fifth side plate (32), respectively. Each second through strip (34) is arc-shaped and arranged parallel to each other and spaced apart. Each second through strip (34) is fixedly connected to each second transverse partition (33).

10. A combine harvester, characterized in that, Includes the threshing concave plate assembly as described in any one of claims 1-9.

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