Upper cover grass guide structure of threshing device and harvester threshing device

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to an upper cover grass guide structure of a threshing device and a harvester threshing device, which comprises an upper cover welding part, a grass guide plate and an angle adjusting structure, and the angle adjusting structure comprises a driving unit; the upper cover welding part is provided with a mounting plate, the inner side face of the mounting plate is a straw guide plate mounting face, the straw guide plate mounting face is provided with a first area and a second area, the first area is sequentially provided with a plurality of fixed straw guide plates in the first direction, and the second area is sequentially provided with a plurality of movable straw guide plates in the first direction. One end of the movable straw guide plate is rotationally connected with the mounting plate through a first hinge assembly, a hinge point is formed in the position where the first hinge assembly is located, and the output end of the angle adjusting structure is connected with the other end of the movable straw guide plate and used for driving the movable straw guide plate to rotate around the hinge point; according to the threshing and separating device, the limitation of a traditional threshing and separating device can be solved to a certain extent, and a more ideal separating effect and higher treatment efficiency are expected to be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, and particularly to a grass guiding structure for the upper cover of a threshing device and a threshing device of a harvester. Background Art

[0002] In the process of crop harvesting, threshing and separation is one of the key steps, aiming to efficiently separate grains (such as seeds) from stalks (straw). Traditional threshing and separation devices usually adopt the design of integrally welding the upper cover of the threshing and separation device and the grass guiding plate. Among them, the grass guiding plate is fixed on the upper cover and guides the crop into the separation area through a spiral shape. Although this design can provide a certain separation efficiency, due to its fixed structure, it limits the number of rotations of the crop inside the separation device and cannot flexibly adapt to the changes of different crop characteristics. For example, changes in factors such as the size, density, and moisture content of the crop will cause differences in the behavior of the material during the separation process, thus affecting the separation effect and efficiency.

[0003] Facing this challenge, existing technologies have tried to optimize the separation effect by adjusting the rotation speed of the threshing device drum. However, this method has several limitations:

[0004] 1. Large moment of inertia of the drum: The high-speed rotating drum requires a large initial energy input and a complex transmission system, which not only increases the manufacturing cost of the equipment but also may have an adverse impact on energy consumption.

[0005] 2. Complex transmission: In order to achieve precise control of the drum speed, the transmission system usually requires precise gears or electronic control systems, which increases the complexity of the equipment and the risk of failure.

[0006] 3. Difficulty in adjusting the rotation speed: In actual operation, it is not easy to adjust the drum rotation speed to match different crop characteristics, and it may be affected by various factors such as environmental factors and operator skills. Content of the Utility Model

[0007] The purpose of the utility model is to provide a grass guiding structure for the upper cover of a threshing device, which can solve the limitations of traditional threshing and separation devices to a certain extent, in order to achieve a more ideal separation effect and higher processing efficiency.

[0008] Another purpose of the utility model is to provide a threshing device for a harvester, which can solve the limitations of traditional threshing and separation devices to a certain extent, in order to achieve a more ideal separation effect and higher processing efficiency.

[0009] The technical solution of the utility model is realized as follows:

[0010] The upper cover grass guiding structure of a threshing device includes an upper cover welding assembly, and further includes an angle adjustment structure. The angle adjustment structure includes a driving unit;

[0011] The upper cover welding assembly has a mounting plate. The inner side surface of the mounting plate is a grass guiding plate mounting surface. The grass guiding plate mounting surface has a first region and a second region. In the first region, a plurality of fixed grass guiding plates are arranged in sequence along a first direction. In the second region, a plurality of movable grass guiding plates are arranged in sequence along the first direction. One end of the movable grass guiding plate is rotatably connected to the mounting plate through a first hinge assembly. The position where the first hinge assembly is located forms a hinge point. The output end of the angle adjustment structure is connected to the other end of the movable grass guiding plate for driving the movable grass guiding plate to rotate around the hinge point.

[0012] Further, the first hinge assembly includes a first bolt assembly. In the second region, a plurality of first bolt holes are opened along the first direction. The first bolt holes are arranged in one-to-one correspondence with the movable grass guiding plates. A second bolt hole is opened at one end of the movable grass guiding plate. The first bolt assembly is installed jointly in the first bolt hole and the second bolt hole.

[0013] Further, the first bolt assembly includes a first bolt and a first locking nut;

[0014] The first bolt sequentially passes through the second bolt hole and the first bolt hole and installs the first locking nut.

[0015] Further, the first hinge assembly further includes a first spacer sleeve. The first spacer sleeve is arranged between the screw part of the first bolt and the inner walls of the first bolt hole and the second bolt hole.

[0016] Further, the outer side surface of the mounting plate is an adjustment structure mounting surface. The angle adjustment structure is installed on the adjustment structure mounting surface;

[0017] The angle adjustment structure further includes a hinge seat, a sliding plate and a second bolt assembly;

[0018] In the second region, a plurality of sliding track holes are further arranged along the first direction. A plurality of third bolt holes are opened on the sliding plate along the first direction. A fourth bolt hole is opened at the other end of the movable grass guiding plate. The sliding track holes, the third bolt holes, and the fourth bolt holes are arranged in one-to-one correspondence with the movable grass guiding plates. The second bolt assembly is installed jointly in the third bolt hole, the fourth bolt hole and the sliding track holes.

[0019] The driving unit uses an electric push rod, a hydraulic cylinder or a cylinder. The fixed end of the driving unit is rotatably connected to the mounting plate through a hinge seat. The telescopic rod end of the driving unit is connected to the sliding plate.

[0020] Furthermore, the second bolt assembly includes a second bolt and a second locking nut. The second bolt sequentially passes through the fourth bolt hole, the sliding track hole, and the third bolt hole and is installed with the second locking nut.

[0021] Furthermore, a wear-resistant plate is also provided between the second bolt and the mounting plate. The second bolt passes through the wear-resistant plate, and a second spacer sleeve is provided between the second bolt and the inner wall of the fourth bolt hole and the inner wall of the sliding track hole.

[0022] Furthermore, the movable grass guiding plate includes a connected mounting portion and a grass guiding portion. The mounting portion is connected to the mounting plate. The grass guiding portion is used for guiding grass, and an anti-entangling grass inclined surface is provided at the edge portion of the grass guiding portion.

[0023] Furthermore, the first region is an arc surface and the second region is a flat surface.

[0024] A threshing device of a harvester includes the upper cover grass guiding structure of the threshing device described above.

[0025] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0026] This application uses a driving unit to drive each movable grass guiding plate to rotate around the hinge point to adjust its angle, and uses the angle adjustment of the adjustable movable grass guiding plate to change the residence time of the material in the threshing cylinder. The angle can be adjusted according to requirements, thereby reducing the breakage rate of grains. Moreover, compared with the prior art method of adjusting the threshing effect by adjusting the rotation speed of the threshing cylinder, this method is more convenient and the response is faster.

[0027] Strong adaptability: By adjusting the angle of the movable grass guiding plate, it can better adapt to the characteristics of different crops, such as the size, density, and moisture content of the crops, and optimize the separation effect.

[0028] Simplified operation: It avoids the need to directly adjust the rotation speed of the cylinder, simplifies the equipment operation process, and reduces the operation complexity and potential failure risks.

[0029] Improved efficiency: It optimizes the flow path and residence time of the crops in the threshing device, and significantly improves the separation efficiency and processing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a top view structural schematic diagram of the grass guiding structure of the upper cover of the present utility model;

[0032] Figure 2 It is a bottom view structural schematic diagram of the grass guiding structure of the upper cover of the present utility model;

[0033] Figure 3 It is a front view structural schematic diagram of the grass guiding structure of the upper cover of the present utility model;

[0034] Figure 4 For the present utility model Figure 3 It is a sectional structural schematic diagram at C-C of the present utility model;

[0035] Figure 5 For the present utility model Figure 4 It is a partial enlarged structural diagram at A of the present utility model;

[0036] Figure 6 It is a top view structural schematic diagram of the welded upper cover of the present utility model;

[0037] Figure 7 It is a bottom view structural schematic diagram of the welded upper cover of the present utility model;

[0038] Figure 8 It is a structural schematic diagram of the movable grass guiding plate of the present utility model;

[0039] Figure 9 It is a structural schematic diagram of the first spacer sleeve of the present utility model;

[0040] Figure 10 It is a structural schematic diagram of the second spacer sleeve of the present utility model.

[0041] In the figure:

[0042] 1 - Welded upper cover; 101 - First region; 102 - Second region; 103 - Adjusting structure mounting surface; 104 - Sliding track hole; 105 - Mounting hole; 106 - First bolt hole;

[0043] 2 - Fixed grass guiding plate; 3 - Movable grass guiding plate; 301 - Mounting part; 3011 - Second bolt hole; 3012 - Fourth bolt hole; 302 - Grass guiding part; 3021 - Anti - entanglement inclined surface;

[0044] 4 - Angle adjusting structure; 401 - Driving unit; 402 - Hinge seat; 403 - Slide plate; 404 - Bracket; 405 - First hinge assembly; 4051 - First bolt; 4052 - First lock nut; 4053 - First spacer sleeve;

[0045] 406 - Second bolt assembly; 4061 - Second bolt; 4062 - Second lock nut; 407 - Wear-resistant plate; 408 - Second spacer sleeve; 5 - Gasket. Detailed implementation mode

[0046] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0048] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0049] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0050] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0051] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arrangement", "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0052] The following will, with reference to the accompanying drawings, elaborate on some embodiments of the present utility model. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0053] Embodiment 1

[0054] In view of the limitations of the traditional method in the prior art, a grass guiding structure for the upper cover of a disengaging device is proposed. Referring to Figures 1-9 , it includes an upper cover welding 1, and also includes an angle adjustment structure 4. The angle adjustment structure 4 includes a driving unit 401. The driving unit 401 can be an electric push rod, a hydraulic cylinder or a pneumatic cylinder that can be telescoped.

[0055] As Figures 1-2 , the upper cover welding 1 has a mounting plate. The inner side surface of the mounting plate is a grass guiding plate mounting surface. The grass guiding plate mounting surface has a first area 101 and a second area 102. A plurality of fixed grass guiding plates 2 are sequentially arranged in the first area 101 along a first direction, and a plurality of movable grass guiding plates 3 are sequentially arranged in the second area 102 along the first direction. One end of the movable grass guiding plate 3 is rotationally connected to the mounting plate through a first hinge assembly 405. The position where the first hinge assembly 405 is located forms a hinge point. The output end of the angle adjustment structure 4 is simultaneously connected to the other ends of the plurality of movable grass guiding plates 3, and is used to drive the movable grass guiding plates 3 to rotate around the hinge point, so as to adjust the angle of the movable grass guiding plates 3.

[0056] In this embodiment, the driving unit 401 is preferably an electric push rod. The fixed end of the electric push rod is rotationally connected to the mounting plate through a hinge seat 402. The hinge seat 402 includes a support and a connecting bolt. The support is integrated with the upper cover welding 1. The end (i.e., the fixed end) of the electric push rod is installed on the support through the connecting bolt, and can rotate with the connecting bolt as the hinge point. As the electric push rod extends and retracts, it can drive the movable grass guiding plates 3 to rotate.

[0057] Specifically, as Figures 4-7, the first hinge assembly 405 adopts a first bolt 4051 assembly. In the second region 102, a plurality of first bolt holes 106 are formed along the first direction. The first bolt holes 106 are arranged in one-to-one correspondence with the movable grass guide plate 3. A second bolt hole 3011 is formed at one end of the movable grass guide plate 3. The first bolt 4051 assembly is jointly installed in the first bolt hole 106 and the second bolt hole 3011. The first bolt 4051 assembly includes a first bolt 4051 and a first locking nut 4052; the first bolt 4051 sequentially passes through the second bolt hole 3011 and the first bolt hole 106 and installs the first locking nut 4052. The first bolt 4051 is the hinge point, and the screw part of the first bolt 4051 is equivalent to the rotating shaft, and the movable grass guide plate 3 can rotate around the screw part of the first bolt 4051.

[0058] In this embodiment, the first bolt 4051 adopts a round head square neck bolt, and the round head part of the round head square neck bolt is located below the movable grass guide plate 3 (i.e., inside the mounting plate). The surface of the round head part of the round head square neck bolt is smooth, which can prevent grass entanglement.

[0059] The first hinge assembly 405 further includes a first spacer sleeve 4053. A first spacer sleeve 4053 is arranged between the screw part of the first bolt 4051 and the inner walls of the first bolt hole 106 and the second bolt hole 3011. The movable grass guide plate 3 is installed on the upper cover weldment 1, and by designing the first spacer sleeve 4053, there is a certain gap between the movable grass guide plate 3 and the upper cover weldment 1 for flexible rotation (such as Figure 5 and Figure 9 ), and the end of the first bolt 4051 (i.e., located outside the mounting plate) is fastened by the first locking nut 4052, and a gasket 5 can be sleeved between the first locking nut 4052 and the mounting plate.

[0060] In this embodiment, the inner side surface of the mounting plate is the grass guide plate mounting surface (such as Figure 1 ), and the outer side surface of the mounting plate is the adjustment structure mounting surface 103, and the angle adjustment structure 4 is installed on the adjustment structure mounting surface 103. The angle adjustment structure 4 further includes a hinge seat 402, a slide plate 403 and a second bolt assembly 406; in the second region 102 of the mounting part 301, a plurality of sliding track holes 104 are further arranged along the first direction. A plurality of third bolt holes are formed in the slide plate 403 along the first direction. A fourth bolt hole 3012 is formed at the other end of the movable grass guide plate 3. The sliding track holes 104, the third bolt holes, and the fourth bolt hole 3012 are arranged in one-to-one correspondence with the movable grass guide plate 3. The second bolt assembly 406 is jointly installed in the third bolt hole, the fourth bolt hole 3012 and the sliding track holes 104.

[0061] Among them, the second bolt assembly 406 includes a second bolt 4061 and a second lock nut 4062. The second bolt 4061 passes through the fourth bolt hole 3012, the sliding track hole 104, and the third bolt hole in sequence and installs the second lock nut 4062, as Figures 4-7 .

[0062] In this embodiment, the second bolt 4061 also adopts a round head square neck bolt, and the round head part of the round head square neck bolt is located below the movable grass guide plate 3 (i.e., inside the mounting plate). The surface of the round head part of the round head square neck bolt is smooth, which can prevent grass entanglement.

[0063] A wear-resistant plate 407 is also arranged between the second bolt 4061 and the mounting plate. The second bolt 4061 passes through the wear-resistant plate 407, and a second spacer sleeve 408 is arranged between the second bolt 4061 and the inner wall of the fourth bolt hole 3012 and the inner wall of the sliding track hole 104 (as Figure 5 and Figure 10 ). A plurality of through holes are correspondingly arranged on the wear-resistant plate 407 for the second bolt 4061 to pass through, and also for the second spacer sleeve 408 to pass through.

[0064] The other end of the second bolt 4061 passes through the movable grass guide plate 3. A second spacer sleeve 408 is designed therebetween to ensure a gap so that the components can move flexibly. The one in contact with the upper cover weld 1 is the wear-resistant plate 407. The material of the wear-resistant plate 407 is nylon material. Outside the nylon wear-resistant plate 407 is the sliding plate 403. Then, the components are installed and locked through the second lock nut 4062. During the rotation of the movable grass guide plate 3, the second bolt 4061 can drive the second spacer sleeve 408 to move back and forth in the track formed by the sliding track hole 104 on the upper cover weld 1.

[0065] The end of the electric push rod is rotatably connected to the mounting plate through a hinge seat 402. The front end (i.e., the telescopic rod end) of the electric push rod is connected to the sliding plate 403. Specifically, a bracket 404 is arranged on the sliding plate 403 to form a sliding plate 403 weldment. The front end of the electric push rod and the bracket 404 are connected together by a connecting bolt and can rotate around the connecting bolt as a hinge point (the hinge method of the front end and the end of the electric push rod is similar). As the electric push rod extends and retracts, it can drive the sliding plate 403 to move. Since the other ends of the plurality of movable grass guide plates 3 are respectively connected to the sliding plate 403 through the second hinge assembly, when the sliding plate 403 moves, it drives the plurality of movable grass guide plates 3 to rotate simultaneously.

[0066] As Figure 2 and Figure 8, the movable straw guiding plate 3 is a bent part, which includes a connected installation part 301 and a straw guiding part 302. Both the installation part 301 and the straw guiding part 302 are plate-like structures. The installation part 301 is connected to the installation plate, and the second bolt holes 3011 and the fourth bolt holes 3012 are respectively formed on the installation part 301. Preferably, both the second bolt holes 3011 and the fourth bolt holes 3012 are square through holes. The straw guiding part 302 is used for guiding straw, and anti-entangling straw inclined surfaces 3021 are respectively arranged at the edge parts of two corners of the straw guiding part 302. The anti-entangling straw inclined surfaces 3021 are to prevent the movement of straw from being blocked and affecting the operation performance of the drum.

[0067] Preferably, the sliding track hole 104 can be an arc hole, a long strip hole or a kidney-shaped hole, so that the second bolt 4061 can move therein. The straw guiding plate installation surface is divided into two parts. The first area 101 is an arc surface for installing and fixing the straw guiding plate 2, and the second area 102 is a plane for installing the movable straw guiding plate 3. The number of the movable straw guiding plates 3 is designed to be 4 (as Figure 2 shown), which can adjust the straw guiding performance within a reasonable range, and the distance between adjacent movable straw guiding plates 3 is the same as the distance between adjacent fixed straw guiding plates 2. The preferred way of this application is to use an electric push rod to drive the sliding plate 403 to pull the movable straw guiding plate 3 to move back and forth, thereby adjusting the angle of the movable straw guiding plate 3. There are various adjustment methods for the angle of the movable straw guiding plate 3, and it also includes manual adjustment, hydraulic adjustment, etc. The design of the first spacer sleeve 4053 and the second spacer sleeve 408 makes the movement of each component flexible. The nylon wear-resistant plate 407 is used to improve the service life, and the lock nut is used to improve the reliability.

[0068] It should be noted that the position of the hinge point is closer to the fixed straw guiding plate 2 than the position of the sliding track, that is, the first bolt 4051 is closer to the fixed straw guiding plate 2 than the second bolt 4061. A plurality of installation holes 105 are respectively formed at the opposite ends of the upper cover weldment 1 to integrally install the upper cover straw guiding structure in the separation section of the separation chamber of the separating device, so as to adjust the separation time, improve the separation effect and reduce the breakage rate.

[0069] Embodiment 2

[0070] This embodiment provides a separating device for a harvester, including the upper cover straw guiding structure of the threshing device.

[0071] Compared with the prior art, this application has the following beneficial effects: By adjusting the angle of the movable straw guiding plate 3, the residence time of materials in the threshing drum can be changed, and the angle can be adjusted according to needs, so as to reduce the breakage rate of grains. Moreover, compared with the method of adjusting the rotation speed of the threshing drum to adjust the threshing effect, this method is more convenient and the reaction is more rapid.

[0072] The beneficial effect of the technical solution of the present utility model is:

[0073] In response to the challenges faced by the prior art, the technical solution of this application proposes an upper cover grass guiding structure that can be detached from the device. This application highlights the potential of the solution and particularly focuses on how to improve the adaptability and efficiency of the threshing and separation process by changing physical parameters (such as the angle of the grass guiding plate) rather than directly adjusting the parameters of the power system (such as the roller speed). Such a design concept reflects an innovation based on the prior art, aiming to solve the limitations of traditional threshing and separation devices in order to achieve a more ideal separation effect and higher processing efficiency.

[0074] This design aims to optimize the separation effect by changing the residence time of the material in the threshing device without directly adjusting the roller speed. Specifically, by adjusting the angle of the grass guiding plate, the flow path and time of the crop in the threshing area can be controlled, making the separation between the straw and the grains more sufficient and capable of adapting to the characteristics of different crops. By dynamically adjusting the angle of the grass guiding plate, the threshing process of the crops is optimized, enhancing the adaptability and processing efficiency of the equipment and simplifying the operation process. It is an innovative design in the field of agricultural machinery.

[0075] 1. Angle adjustment structure 4: A driving unit 401 (such as an electric push rod, a hydraulic cylinder or a pneumatic cylinder) is designed and connected to the mounting plate on the upper cover weldment 1 through a hinge seat 402 to drive the movable grass guiding plate 3 to rotate around the hinge point.

[0076] 2. Hinge assembly and bolt assembly: Fixed points are set on the mounting plate, and the grass guiding plate is connected to the upper cover weldment 1 through bolt assemblies (the first bolt 4051 assembly, the second bolt assembly 406), and the angle of the grass guiding plate is adjusted by adjusting the bolt assemblies.

[0077] 3. Wear-resistant plate 407 and spacer sleeves: A wear-resistant plate 407 and spacer sleeves (the first spacer sleeve 4053 and the second spacer sleeve 408) are added between the grass guiding plate and the upper cover weldment 1 to extend the service life of the structure and ensure the smoothness of the adjustment process.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0079] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A grass guiding structure of an upper cover of a threshing device, comprising an upper cover weld (1), characterized in that: It also includes an angle adjustment structure (4), wherein the angle adjustment structure (4) includes a drive unit (401); The upper cover weld (1) has a mounting plate, the inner side surface of the mounting plate is a grass guide plate mounting surface, the grass guide plate mounting surface has a first area (101) and a second area (102), the first area (101) is provided with a plurality of fixed grass guide plates (2) in sequence along a first direction, the second area (102) is provided with a plurality of movable grass guide plates (3) in sequence along the first direction, one end of the movable grass guide plate (3) is rotatably connected to the mounting plate via a first hinge assembly (405), the position of the first hinge assembly (405) forms a hinge point, and the output end of the angle adjustment structure (4) is simultaneously connected to the other end of the plurality of movable grass guide plates (3) for driving the movable grass guide plates (3) to rotate around the hinge point.

2. The upper cover grass guide structure of the threshing device according to claim 1 is characterized in that: The first hinge assembly (405) includes a first bolt (4051) assembly, and a plurality of first bolt holes (106) are opened in the second area (102) along the first direction. The first bolt holes (106) are arranged in a one-to-one correspondence with the movable grass guide plate (3). A second bolt hole (3011) is opened at one end of the movable grass guide plate (3), and the first bolt hole (106) and the second bolt hole (3011) are jointly installed in the first bolt hole (106) and the second bolt hole (3011).

3. The upper cover grass guide structure of the threshing device according to claim 2 is characterized in that: The first bolt (4051) assembly comprises a first bolt (4051) and a first locking nut (4052); The first bolt (4051) is sequentially inserted into the second bolt hole (3011) and the first bolt hole (106) and the first locking nut (4052) is installed.

4. The upper cover grass guide structure of the threshing device according to claim 3, characterized in that: The first hinge assembly (405) further includes a first spacer sleeve (4053), and the first spacer sleeve (4053) is arranged between the screw portion of the first bolt (4051) and the inner wall of the first bolt hole (106) and the inner wall of the second bolt hole (3011).

5. The upper cover grass guide structure of the threshing device according to claim 1, characterized in that: The outer side surface of the mounting plate is an adjustment structure mounting surface (103), and the angle adjustment structure (4) is mounted on the adjustment structure mounting surface (103); The angle adjustment structure (4) further comprises a hinge seat (402), a slide plate (403) and a second bolt assembly (406); A plurality of sliding track holes (104) are also arranged in the second area (102) along the first direction, a plurality of third bolt holes are opened on the slide plate (403) along the first direction, a fourth bolt hole (3012) is opened at the other end of the movable grass guide plate (3), the sliding track hole (104), the third bolt hole, the fourth bolt hole (3012) and the movable grass guide plate (3) are arranged in a one-to-one correspondence, and the second bolt assembly (406) is installed in the third bolt hole, the fourth bolt hole (3012) and the sliding track hole (104); The driving unit (401) adopts an electric push rod, a hydraulic cylinder or a pneumatic cylinder. The fixed end of the driving unit (401) is rotatably connected to the mounting plate via a hinge seat (402), and the telescopic rod end of the driving unit (401) is connected to the slide plate (403).

6. The upper cover grass guide structure of the threshing device according to claim 5, characterized in that: The second bolt assembly (406) includes a second bolt (4061) and a second locking nut (4062), and the second bolt (4061) is sequentially inserted into the fourth bolt hole (3012), the sliding track hole (104), and the third bolt hole and the second locking nut (4062) is installed.

7. The upper cover grass guide structure of the threshing device according to claim 6, characterized in that: A wear-resistant plate (407) is also arranged between the second bolt (4061) and the mounting plate, the second bolt (4061) is passed through the wear-resistant plate (407), and a second spacer sleeve (408) is arranged between the second bolt (4061) and the inner wall of the fourth bolt hole (3012) and the inner wall of the sliding track hole (104).

8. The upper cover grass guide structure of the threshing device according to claim 1, characterized in that: The movable grass guide plate (3) comprises a mounting portion (301) and a grass guide portion (302) which are connected to each other, wherein the mounting portion (301) is connected to the mounting plate, the grass guide portion (302) is used for guiding grass, and an anti-grass entanglement inclined surface (3021) is provided at the edge of the grass guide portion (302).

9. The upper cover grass guide structure of the threshing device according to claim 1, characterized in that: The first area (101) is an arc surface, and the second area (102) is a plane.

10. A threshing device for a harvester, characterized in that: The invention comprises the upper cover grass guiding structure of the threshing device according to any one of claims 1 to 9.

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