Harvester threshing assembly and combine harvester

Abstract

The utility model provides a kind of harvester threshing assembly and combine harvester, and the harvester threshing assembly includes: concave plate, its left and right two ends are installed on rack, and first concave arc part and second concave arc part are sequentially provided on its upper side along from front to rear direction;First threshing cylinder, it is located the just above of first concave arc part, and its left and right two ends are rotatably installed on rack;Second threshing cylinder, it is located the just above of second concave arc part, and its left and right two ends are rotatably installed on rack;Rap separator, it is located the back side of concave plate and higher than concave plate, and its left and right two ends are rotatably installed on rack.Using the utility model, the cooperation of first threshing cylinder and second threshing cylinder changes the movement direction of straw, improves the rubbing effect of second threshing cylinder to straw, improves the threshing separation efficiency of threshing assembly;Under the condition of fast feeding speed, large flow, still can guarantee clean threshing separation, improves operation speed.

Description

Technical Field

[0001] This utility model relates to the field of harvester technology, specifically to a harvester threshing assembly and a combine harvester. Background Technology

[0002] In recent years, influenced by axial-flow harvesters, models with high harvesting efficiency and multi-functionality have become increasingly popular among users. In the wheeled grain combine harvester market, large harvesters remain the mainstream product, with fewer models featuring a threshing assembly primarily composed of a straw runner. Major companies have also invested relatively little in the research and development of straw runner models. With the continuous development of animal husbandry, the demand for crop straw is increasing, and users have new requirements for the length of crop straw discharged after harvesting and the efficiency of vehicle operations, demanding increasingly longer straw discharges. Traditional axial-flow harvesters cannot simultaneously meet these user needs; therefore, combine harvesters using the tangential flow + straw runner technology route are gradually coming into focus.

[0003] However, in the combine harvesters currently popular in the agricultural machinery market that use the shearing flow + straw-following technology route, the feeding speed is limited by the threshing assembly in order to ensure that the single threshing drum can fully rub the straw. As a result, the operating efficiency is low, the operating time during the operating season is long, and it is difficult to adapt to the development trend of the market. Utility Model Content

[0004] To solve at least one of the above technical problems, this utility model provides a harvester threshing assembly and a combine harvester.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a harvester threshing assembly, including: frame; A concave plate, with its left and right ends mounted on the frame, has a first concave arc portion and a second concave arc portion arranged sequentially on its upper side from front to back. The first threshing drum is located directly above the first concave arc portion and has a gap with the first concave arc portion, and its left and right ends are rotatably mounted on the frame. The second threshing drum is located directly above the second concave arc portion and has a gap with the second concave arc portion. Its left and right ends are rotatably mounted on the frame. The manuscript-following wheel is located behind and above the concave plate, and its left and right ends are rotatably mounted on the frame.

[0006] The beneficial effects of this utility model are: This invention utilizes a first threshing drum for initial threshing and separation. The cooperation between the first and second threshing drums alters the direction of straw movement, enhancing the kneading effect of the second threshing drum on the straw. This allows the second threshing drum to fully thresh and separate the straw, improving the threshing and separation efficiency of the threshing assembly. Consequently, even with high feeding speed and large flow rate, it can still ensure clean threshing and separation with minimal loss, increasing operating speed and improving harvesting efficiency, thus adapting to the market's trend towards high-efficiency operations.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, on the axial projection of the first threshing drum, the axis of the first threshing drum, the axis of the second threshing drum, and the axis of the paper-fed roller are located on the same concave parabolic profile.

[0009] It improves the threshing and separation effect and ensures smooth material movement.

[0010] Furthermore, the parabolic profile satisfies formula A or formula B: Formula A: y=-1 / 105 x 2 +6.46x; where the X-axis extends horizontally forward and the Y-axis extends vertically downward; Formula B: y = 1 / 105 x 2 -6.46x; where the X-axis extends horizontally backward and the Y-axis extends vertically upward.

[0011] This ensures that the parabolic profile is concave upwards, resulting in a concave shape. Simultaneously, the axes of the first threshing drum, the second threshing drum, and the chaff roller are distributed along this parabolic profile, resulting in good threshing and separation effects and smooth material movement.

[0012] Furthermore, the parabolic profile extends along formula B, where the value of x ranges from 0 to 2000.

[0013] This allows the shaft centers of the first threshing drum, the second threshing drum, and the threshing roller to rise sequentially, driving the material to move gradually backward and upward, thus improving the threshing and separation effect.

[0014] Furthermore, the axis of the first threshing cylinder is lower than the axis of the second threshing cylinder, and the axis of the second threshing cylinder is lower than the axis of the paper-fed roller.

[0015] This facilitates the gradual backward and upward movement of materials, improving the threshing and separation effect.

[0016] Furthermore, the diameters of the first threshing cylinder and the threshing wheel are both smaller than the diameter of the second threshing cylinder.

[0017] The second threshing drum improves the straw turning and conveying capacity, resulting in better threshing and separation effects, and can fully utilize the conveying function of the first threshing drum.

[0018] Furthermore, the manuscript-progressing wheel is a multi-faceted prism-shaped cylindrical structure with an edge of not less than 4. The side of the manuscript-progressing wheel is concave, and a lever is fixed at the edge of the manuscript-progressing wheel. The lever extends clockwise along the projection of the manuscript-progressing wheel from left to right.

[0019] It facilitates changing the direction of straw movement and pushes the straw backward along the underside of the straw-carrying wheel, resulting in high conveying efficiency.

[0020] Furthermore, a cantilever plate is provided on the lower side of the scroll wheel. The front end of the cantilever plate is fixedly connected to the top rear side of the concave plate, and the rear end of the cantilever plate extends obliquely upward.

[0021] It facilitates the support of straw for the straw-fed roller to throw backward. The cantilever plate provides elasticity and extends diagonally upward, increasing the throwing distance of the straw-fed roller and ensuring that the straw-fed roller throws the straw onto the rear straw-fed device, preventing the straw from falling prematurely.

[0022] Furthermore, a first drive shaft is coaxially fixed to the middle of the first threshing drum, and a first drive wheel is fixed to one end of the first drive shaft; a second drive shaft is coaxially fixed to the middle of the second threshing drum, and a second drive wheel and a third drive wheel are fixed to one end of the second drive shaft; a third drive shaft is coaxially fixed to the middle of the threshing drum, and a fourth drive wheel is fixed to one end of the third drive shaft; the first drive wheel is connected to the second drive wheel, and the third drive wheel is connected to the fourth drive wheel.

[0023] The four drive wheels enable the first, second, and third drive shafts to work together as a single unit, facilitating the simultaneous rotation of the first threshing drum, the second threshing drum, and the threshing wheel. This simplifies the transmission system and results in a compact structure.

[0024] This utility model also provides a combine harvester, including a body, a bridge body installed at the front of the body, a straw remover installed in the middle of the body, and the aforementioned harvester threshing assembly between the bridge body and the straw remover. The frame is fixed on the body, the front side of the first concave arc portion is connected to the outlet of the bridge body, and the straw remover is connected to the rear side of the second concave arc portion.

[0025] It has high threshing and separation efficiency. Even with fast feeding speed and large flow rate, it can still ensure clean threshing and separation with minimal loss, thereby improving the operation speed and harvesting efficiency, and adapting to the market's trend of high-efficiency operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the threshing assembly of the harvester according to this utility model.

[0027] Figure 2 This is a schematic diagram of the transmission relationship of this utility model.

[0028] Figure 3 This is a schematic diagram of the structure of the combine harvester of this utility model.

[0029] In the accompanying drawings, the technical features represented by each reference numeral are as follows: 1-Concave plate; 2-First threshing cylinder; 3-Second threshing cylinder; 4-Whip-following wheel; 5-First concave arc section; 6-Second concave arc section; 7-Pulley plate; 8-Cantilever plate; 9-First drive shaft; 10-Second drive shaft; 11-Third drive shaft; 12-First drive wheel; 13-Second drive wheel; 14-Third drive wheel; 15-Fourth drive wheel; N-Parabolic profile; 20-Body; 21-Bridge body; 22-Manuscript walker. Detailed Implementation

[0030] 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.

[0031] This utility model refers to Figure 1-3 .

[0032] Example 1, such as Figure 1-2 As shown: This utility model provides a harvester threshing assembly, including: frame; A concave plate 1 is mounted on the frame at its left and right ends, and a first concave arc portion 5 and a second concave arc portion 6 are provided sequentially on its upper side from front to back. The first threshing drum 2 is located directly above the first concave arc portion 5 and has a gap with the first concave arc portion 5. Its left and right ends are rotatably mounted on the frame. The second threshing drum 3 is located directly above the second concave arc portion 6 and has a gap with the second concave arc portion 6. Its left and right ends are rotatably mounted on the frame. The manuscript-following wheel 4 is located behind and above the concave plate 1, and its left and right ends are rotatably mounted on the frame.

[0033] principle: During installation, the frame is fixedly mounted on the harvester body 20, or the middle part of the harvester body 20 can be used directly as the frame. The concave plate 1 is an existing structure on the harvester, and its left and right ends are installed with the frame in a manner that is existing technology. Specifically, the left and right ends of the concave plate 1 are hinged with adjusting rods, which are hinged to the frame. The adjusting rods can be configured as multi-segment or telescopic structures, and the two segments of the adjusting rods can be connected by a detachable connection, a tensioner connection, or other means to make the length adjustable, thereby allowing the concave plate 1 to be adjusted. At the same time, the front side of the concave plate 1 is connected to the bridge body 21 at the front of the harvester, and the outlet of the bridge body 21 is directly opposite the gap between the first threshing drum 2 and the first concave arc 5; the rear side of the concave plate 1 is connected to the straw collector 22 in the middle of the harvester, and the straw collector 22 is located below the outlet on the rear side of the second concave arc 6. In addition, the harvester's drive system is connected to the first threshing drum 2, the second threshing drum 3, and the straw collector 4 respectively to drive the rotation of the three.

[0034] During operation, the bridge body 21 at the front of the harvester transports the crop into the interior. After exiting the bridge body 21, the straw enters the gap between the first threshing drum 2 and the first concave arc portion 5. Under the action of the first threshing drum 2, the straw is initially kneaded, achieving a partial threshing and separation effect. Simultaneously, the first threshing drum 2 transports the straw backward to the space between the first concave arc portion 5 and the second concave arc portion 6, causing the straw to leave obliquely upward along the rear arc surface of the first concave arc portion 5. Subsequently, under the action of the second threshing drum 3, the direction of straw movement changes to obliquely downward along the front arc surface of the second concave arc portion 6, entering the gap between the second threshing drum 3 and the second concave arc portion 6. By changing the direction of straw movement, the second threshing drum 3 can fully knead the straw, improving the threshing and separation effect. At the same time, the second threshing drum 3 transports the straw backward to the rear side of the second concave arc portion 6, causing the straw to leave obliquely upward along the rear arc surface of the second concave arc portion 6. Finally, the straw-threshing wheel 4 throws the straw backward along its underside, causing it to fall onto the straw-threshing device 22, completing the threshing process. The straw-threshing device 22 then separates any remaining grains from the straw through vibration and sieving, reducing grain loss and straw damage. The bridge body 21 and the straw-threshing device 22 are existing equipment on the harvester and belong to prior art.

[0035] Note: The side wall of the threshing drum has multiple protrusions or blades, which are used to knead and move the straw.

[0036] In summary, this invention utilizes the first threshing drum 2 for initial threshing and separation. The cooperation between the first threshing drum 2 and the second threshing drum 3 alters the direction of straw movement, enhancing the kneading effect of the second threshing drum 3 on the straw. This allows the second threshing drum 3 to fully thresh and separate the straw, improving the threshing and separation efficiency of the threshing assembly. Consequently, even with high feeding speed and large flow rate, it can still ensure clean threshing and separation with minimal loss, increasing operating speed and achieving improved harvesting efficiency, thus adapting to the market's trend towards high-efficiency operations.

[0037] Furthermore, along the axial projection of the first threshing drum 2, the axis of the first threshing drum 2, the axis of the second threshing drum 3, and the axis of the paper-following wheel 4 are located on the same concave parabolic contour N.

[0038] It improves the threshing and separation effect and ensures smooth material movement.

[0039] Furthermore, the parabolic profile N satisfies formula A or formula B: Formula A: y=-1 / 105 x 2 +6.46x; where the X-axis extends horizontally forward and the Y-axis extends vertically downward; Formula B: y = 1 / 105 x 2 -6.46x; where the X-axis extends horizontally backward and the Y-axis extends vertically upward.

[0040] Note: The expressions in formulas A and B above define the shape of the parabolic profile N, thereby defining the distribution positions of the axis of the first threshing drum 2, the axis of the second threshing drum 3, and the axis of the threshing wheel 4, which is an improvement in the structure.

[0041] This ensures that the parabolic profile N is concave upwards, thus making the parabolic profile N a concave shape; at the same time, the axis of the first threshing drum 2, the axis of the second threshing drum 3, and the axis of the threshing wheel 4 are distributed along the parabolic profile N of this shape, resulting in good threshing and separation effect and smooth material movement.

[0042] Furthermore, the parabolic profile N extends along formula B, where the value of x ranges from 0 to 2000.

[0043] Note: The significance of the range of x values ​​lies in the fact that a finite segment is extracted from the infinite domain of the parabola as the parabolic profile N, thereby limiting the curvature range, smoothness, and other shapes of the parabolic profile N, which is an improvement in construction. At the same time, since y and x have a one-to-one correspondence, even if the length unit is limited, the relationship between y and x remains unchanged, and thus the shape of the parabolic profile N remains unchanged. Therefore, the range of x values ​​does not need to be limited by the length unit, and its length unit can be adjusted proportionally according to the actual situation such as the size of the harvester and the size of the threshing drum.

[0044] This allows the shafts of the first threshing drum 2, the second threshing drum 3, and the threshing wheel 4 to rise sequentially, driving the material to move gradually backward and upward, thus improving the threshing and separation effect.

[0045] Furthermore, the axis of the first threshing drum 2 is lower than the axis of the second threshing drum 3, and the axis of the second threshing drum 3 is lower than the axis of the paper-fed roller 4.

[0046] This facilitates the gradual backward and upward movement of materials, improving the threshing and separation effect.

[0047] Furthermore, the diameters of the first threshing drum 2 and the threshing wheel 4 are both smaller than the diameter of the second threshing drum 3.

[0048] Note: When the draft wheel 4 is a polygonal prism or rectangular cylindrical structure, the diameter of the circumscribed circle of its cross section is the diameter of the draft wheel 4; the diameter of the draft wheel 4 refers to the outer diameter of the solid structure's motion profile when it rotates.

[0049] The second threshing drum 3 improves the ability of turning and conveying straw, resulting in better threshing and separation effect, and can give full play to the conveying function of the first threshing drum 2.

[0050] Furthermore, the manuscript-pursuing wheel 4 is a multi-faceted prism-shaped cylindrical structure with an edge of not less than 4. The side of the manuscript-pursuing wheel 4 is concave. A lever 7 is fixed at the edge of the manuscript-pursuing wheel 4, and the lever 7 extends clockwise along the projection of the manuscript-pursuing wheel 4 from left to right.

[0051] Preferably, the manuscript-pursuing wheel 4 has a rectangular cylindrical structure, and the four sides of the manuscript-pursuing wheel 4 are concave. A lever 7 is fixed at the edge of the four sides of the manuscript-pursuing wheel 4, and the lever 7 extends in a clockwise direction along the projection of the manuscript-pursuing wheel 4 from left to right.

[0052] Note: The view direction in the attached diagram is the direction of projection from left to right along the draft wheel 4. That is, the dial 7 extends in the direction of "forward-upward-backward-downward".

[0053] It facilitates changing the direction of straw movement and pushes the straw backward along the underside of the straw-carrying wheel 4, resulting in high conveying efficiency.

[0054] Furthermore, a cantilever plate 8 is provided on the lower side of the scroll wheel 4. The front end of the cantilever plate 8 is fixedly connected to the top rear side of the concave plate 1, and the rear end of the cantilever plate 8 extends obliquely upward.

[0055] The cantilever plate 8 provides elasticity by supporting the straw for the straw-throwing wheel 4 to throw backward. It also extends upward at an angle, increasing the throwing distance of the straw-throwing wheel 4 and ensuring that the straw-throwing wheel 4 throws the straw onto the rear straw-throwing device 22, thus preventing the straw from falling prematurely.

[0056] Furthermore, a first drive shaft 9 is coaxially fixed in the middle of the first threshing drum 2, and a first drive wheel 12 is fixed at one end of the first drive shaft 9; a second drive shaft 10 is coaxially fixed in the middle of the second threshing drum 3, and a second drive wheel 13 and a third drive wheel 14 are fixed at one end of the second drive shaft 10; a third drive shaft 11 is coaxially fixed in the middle of the threshing drum 4, and a fourth drive wheel 15 is fixed at one end of the third drive shaft 11; the first drive wheel 12 is connected to the second drive wheel 13, and the third drive wheel 14 is connected to the fourth drive wheel 15.

[0057] Preferably, an input wheel is also fixed to the other end of the third drive shaft 11. The input wheel is used to connect to the output wheel of the harvester's engine to obtain power. Furthermore, the first drive wheel 12 is connected to the second drive wheel 13 via belt drive, and the third drive wheel 14 is connected to the fourth drive wheel 15 via belt drive. Additionally, end plates are fixed to both ends of the first threshing drum 2, the second threshing drum 3, and the straw collector 22, and the first drive shaft 9, the second drive shaft 10, and the third drive shaft 11 are fixedly connected to their corresponding end plates.

[0058] The four drive wheels enable the first drive shaft 9, the second drive shaft 10, and the third drive shaft 11 to work together, which facilitates the simultaneous rotation of the first threshing drum 2, the second threshing drum 3, and the chaff roller 4, simplifying the transmission system and resulting in a compact structure.

[0059] Example 2, as follows Figure 3 As shown: This utility model also provides a combine harvester, including a body 20, a bridge body 21 installed at the front of the body 20, a threshing device 22 installed in the middle of the body 20, and the aforementioned harvester threshing assembly is provided between the bridge body 21 and the threshing device 22. The frame is fixed on the body 20, the front side of the first concave arc portion 5 is connected to the outlet of the bridge body 21, and the threshing device 22 is connected to the rear side of the second concave arc portion 6.

[0060] It has high threshing and separation efficiency. Even with fast feeding speed and large flow rate, it can still ensure clean threshing and separation with minimal loss, thereby improving the operation speed and harvesting efficiency, and adapting to the market's trend of high-efficiency operation.

[0061] In the description of this utility model, it should be understood that if descriptive terms indicating orientation, direction, or positional relationship appear, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of understanding this utility model and simplifying the description, and does not indicate or imply that the part, element, or whole referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0062] Furthermore, if sequential descriptive terms such as "first," "second," etc., appear, their purpose in this specification is for ease of understanding or simplification. For example, to distinguish multiple technical features of the same type or function, which must be mentioned separately, this specification may use prefixes or suffixes to differentiate them. Therefore, they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this utility model, if descriptive terms describing structural relationships are used, such as "installation," "connection," "joining," and "fixing," they should be interpreted broadly unless otherwise explicitly specified and limited. For example, "installation," "connection," and "joining" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. "Fixing" can refer to an integral fixation or a detachable fixation using fasteners; it can be a direct fixation or a fixation through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood based on the specific circumstances, the context, and the coherence of the preceding and following text.

[0064] In this utility model, if descriptive terms containing subordinate or connecting meanings appear, such as "above" or "below" the second feature, they should not be interpreted restrictively unless otherwise explicitly specified and limited. For example, "above" or "below" can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood according to the specific circumstances, the context, and the coherence of the preceding and following text.

[0065] Furthermore, "above," "on top of," and "above" the first feature in relation to 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," "under," and "below" the first feature in relation to 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.

[0066] 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. The illustrative expressions of the above terms in this specification 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, examples, and features described in this specification, and such combinations or integrations should all fall within the scope of the present invention.

[0067] 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. Variations, modifications, substitutions, and modifications made by those skilled in the art to the above embodiments within the scope of information available through public channels and in conjunction with the technical teachings given in this application are still covered within the protection scope of this application.

Claims

1. A harvester threshing assembly, characterized in that: include: frame; The concave plate (1) is mounted on the frame at both ends, and the upper side of the plate is provided with a first concave arc portion (5) and a second concave arc portion (6) in sequence from front to back. The first threshing drum (2) is located directly above the first concave arc portion (5) and has a gap with the first concave arc portion (5). Its left and right ends are rotatably mounted on the frame. The second threshing drum (3) is located directly above the second concave arc portion (6) and has a gap with the second concave arc portion (6). Its left and right ends are rotatably mounted on the frame. The manuscript roller (4) is located behind the concave plate (1) and higher than the concave plate (1), and its left and right ends are rotatably mounted on the frame.

2. The harvester threshing assembly according to claim 1, characterized in that: On the axial projection of the first threshing drum (2), the axis of the first threshing drum (2), the axis of the second threshing drum (3) and the axis of the chaff roller (4) are located on the same concave parabolic profile.

3. The harvester threshing assembly according to claim 2, characterized in that: The axis of the first threshing drum (2) is lower than the axis of the second threshing drum (3), and the axis of the second threshing drum (3) is lower than the axis of the threshing wheel (4).

4. The harvester threshing assembly according to claim 3, characterized in that: The diameter of the first threshing drum (2) and the diameter of the threshing wheel (4) are both smaller than the diameter of the second threshing drum (3).

5. The harvester threshing assembly according to claim 1, characterized in that: The manuscript-pursuing wheel (4) is a multi-faceted cylindrical structure with an edge of not less than 4. The side of the manuscript-pursuing wheel (4) is concave. A dial plate (7) is fixed at the edge of the manuscript-pursuing wheel (4). The dial plate (7) extends clockwise along the manuscript-pursuing wheel (4) from left to right.

6. The harvester threshing assembly according to claim 5, characterized in that: The manuscript wheel (4) is a quadrangular cylindrical structure.

7. The harvester threshing assembly according to claim 1, characterized in that: The lower side of the scroll wheel (4) is also provided with a cantilever plate (8), the front end of the cantilever plate (8) is fixedly connected to the top of the rear side of the concave plate (1), and the rear end of the cantilever plate (8) extends obliquely upward.

8. The harvester threshing assembly according to claim 1, characterized in that: The first threshing drum (2) is coaxially fixed with a first drive shaft (9) in the middle, and a first drive wheel (12) is fixed at one end of the first drive shaft (9); the second threshing drum (3) is coaxially fixed with a second drive shaft (10) in the middle, and a second drive wheel (13) and a third drive wheel (14) are fixed at one end of the second drive shaft (10); the paper-following drum (4) is coaxially fixed with a third drive shaft (11) in the middle, and a fourth drive wheel (15) is fixed at one end of the third drive shaft (11); the first drive wheel (12) is connected to the second drive wheel (13) in a drive connection, and the third drive wheel (14) is connected to the fourth drive wheel (15) in a drive connection.

9. A combine harvester, comprising a body (20), a bridge body (21) mounted at the front of the body (20), and a seed-moving device (22) mounted at the middle of the body (20), characterized in that: Between the bridge body (21) and the threshing machine (22), there is also a harvester threshing assembly as described in any one of claims 1-8. The frame is fixed on the machine body (20). The front side of the first concave arc part (5) is connected to the outlet of the bridge body (21), and the threshing machine (22) is connected to the rear side of the second concave arc part (6).

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