A grain collecting structure and sunflower harvester

Abstract

The utility model relates to a kind of seed grain collection structure and sunflower harvester, relate to agricultural machinery technical field, a kind of seed grain collection structure, comprising: sieve box, it is upper opening structure, and its bottom is through and is provided with discharge port;Grain stirring dragon assembly, its feed port is communicated with the discharge port;Grain elevator pipeline, its feed port is communicated with the discharge port of the grain stirring dragon assembly, and its discharge port is communicated with grain box assembly;Blowing seed fan assembly, its blowing port is communicated with the discharge port of the grain stirring dragon assembly and the feed port of the grain elevator pipeline.The utility model can reduce the problem that existing sunflower seed harvesting mode causes seed grain to appear scratch even to break shell, guarantee seed grain harvesting quality.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a grain collection structure and a sunflower harvester. Background Technology

[0002] Sunflower is one of the world's five major oilseed crops, with two varieties: oil sunflower and edible sunflower. In China, the planting area for edible sunflower is approximately 700,000 hectares. Harvesting is a crucial step in the mechanized production of edible sunflower. Currently, most areas in China rely on manual, segmented harvesting, with a machine harvesting rate of less than 30%. This low level of mechanization, significant losses, and high impurity content severely restrict the development of the edible sunflower industry. Mechanized combined harvesting offers advantages such as high efficiency and minimal losses, representing an inevitable trend in future agricultural harvesting. Developing advanced combined harvesting equipment for edible sunflower is of great significance for promoting the development of the edible sunflower industry.

[0003] Currently, in the mechanized harvesting of sunflower seeds, the seed bin is located at the top of the harvester. Sunflower seeds are mostly collected using an auger or scraper to lift and collect them into the seed bin. However, this method of seed collection can cause scratches or even shell breakage due to the contact between the auger or scraper, affecting the quality of the seeds. Utility Model Content

[0004] This utility model provides a grain collection structure and a sunflower harvester, which can reduce the problems of scratches or even shell breakage of seeds in existing sunflower seed harvesting methods and ensure the quality of seed harvesting.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a grain collection structure, including: The screen box has an open top structure and a discharge port that runs through its bottom. The grain auger assembly has its inlet connected to the discharge outlet; The grain conveyor pipe has its inlet connected to the outlet of the grain auger assembly, and its outlet is connected to the grain box assembly. The blowing fan assembly has its blowing port connected to the discharge port of the grain auger assembly and the inlet of the grain elevator pipe.

[0006] The beneficial effects of this utility model are as follows: During use, the threshed sunflower seeds fall into the sieve box from the upper opening and enter the seed auger assembly from the discharge port of the sieve box. Under the push of the seed auger assembly, they are gradually discharged from the discharge port of the seed auger assembly. At the same time, the operating seed blowing fan assembly blows air into the seed elevator pipe, blowing the sunflower seeds discharged from the discharge port of the seed auger assembly into the seed elevator pipe, and then into the seed box assembly through the seed elevator pipe to complete the collection. This achieves wind-powered grain collection. Compared with the existing technology that uses an auger or scraper to scrape upwards to collect grain, this can reduce the problem of scratches or even shell breakage of seeds in the existing sunflower seed harvesting method, and ensure the quality of the harvested seeds.

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

[0008] Furthermore, it also includes a cleaning blower assembly and an exhaust duct with one end connected to the air outlet of the cleaning blower assembly. The upper end of the screen box away from the exhaust duct is provided with a waste discharge port, and the air outlet of the exhaust duct faces the waste discharge port.

[0009] Furthermore, the screen box has a bottom plate that connects the discharge port and the impurity discharge port simultaneously, and the bottom plate is inclined upward from the discharge port toward the impurity discharge port.

[0010] Furthermore, the base plate includes a lower inclined section whose lower end is connected to the discharge port, a middle inclined section whose lower end is connected to the upper end of the lower inclined section, and an upper inclined section whose lower end is connected to the upper end of the middle inclined section. The upper end of the upper inclined section is connected to the impurity discharge port. The inclination angles of the lower inclined section, the upper inclined section, and the middle inclined section increase sequentially, and the middle inclined section is closer to the impurity discharge port relative to the discharge port.

[0011] Furthermore, it also includes a waste auger assembly with the feed inlet connected to the waste discharge port, a waste elevator assembly with the feed inlet connected to the waste auger assembly discharge port, and a waste collection box connected to the waste elevator assembly discharge port.

[0012] Furthermore, it also includes a sieve plate, which is horizontally placed at the upper opening of the sieve box.

[0013] Furthermore, the sieve plate is inclined, with its lower end close to the exhaust duct and its upper end forming the waste discharge port together with the sieve box, and at least the middle and upper ends of the sieve plate are located on the air blowing path of the exhaust duct outlet.

[0014] This utility model also provides a sunflower harvester, including a grain collection structure, a frame, a header, a bridge connecting the feed end to the discharge port of the header, a tangential roller assembly connecting the feed end to the discharge end of the bridge, and a longitudinal axial roller assembly connecting the feed end to the discharge end of the tangential roller assembly. The grain collection structure, the bridge, the tangential roller assembly, and the longitudinal axial roller assembly are all mounted on the frame. The frame is also equipped with a vibrating conveyor assembly located directly below the tangential roller assembly. The discharge end of the vibrating conveyor assembly is connected to the screen plate, and the screen plate is located directly below the longitudinal axial roller assembly.

[0015] Furthermore, it also includes a dial roller assembly, a sunflower tray elevator, and a sunflower tray box, all mounted on the frame. The feed inlet of the dial roller assembly is connected to the discharge outlet of the longitudinal axial flow roller assembly, the feed inlet of the sunflower tray elevator is connected to the discharge outlet of the dial roller assembly, and the sunflower tray box is connected to the discharge outlet of the sunflower tray elevator.

[0016] Furthermore, the longitudinal axial flow drum assembly includes a longitudinal axial flow drum and a concave plate both mounted on the frame. The concave plate is spaced apart on the outside of the longitudinal axial flow drum and forms a threshing chamber with the longitudinal axial flow drum that communicates with the discharge end of the tangential flow drum assembly. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the grain collection structure of this utility model; Figure 2 For the present utility model Figure 1 A magnified view of a portion of the image; Figure 3 This is a partial structural diagram of the grain collection structure of this utility model; Figure 4 For the present utility model Figure 3 A partial structural sectional view; Figure 5 This is a right-side side view of the sunflower harvester of this utility model; Figure 6 This is a left-side side view of the sunflower harvester of this utility model; Figure 7 This is a front view of the sunflower harvester of this utility model; Figure 8 This is a partial structural diagram of the longitudinal axial flow roller assembly of this utility model.

[0018] The attached diagram lists the components represented by each number as follows: 1. Screen box; 11. Discharge port; 12. Impurity discharge port; 13. Base plate; 131. Lower inclined section; 132. Middle inclined section; 133. Upper inclined section; 2. Grain auger assembly; 3. Grain conveyor piping; 31. Grain box assembly; 4. Seed blowing fan assembly; 5. Cleaning fan assembly; 51. Exhaust duct; 6. Waste auger assembly; 61. Waste elevator assembly; 62. Waste collection box; 7. Sieve plate; 8. Frame; 81. Header; 811. Stalk puller roller; 812. Reel; 813. Feed auger; 82. Bridge; 83. Truncate roller assembly; 84. Longitudinal axial roller assembly; 841. Longitudinal axial roller; 842. Concave plate; 85. Vibrating conveyor assembly; 86. Dial roller assembly; 87. Sunflower tray elevator; 88. Sunflower tray box. Detailed Implementation

[0019] 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.

[0020] Example 1 like Figures 1-4 This utility model provides a grain collection structure, comprising: The screen box 1 has an open top structure and a discharge port 11 is provided through the bottom of the screen box. The grain auger assembly 2 has its inlet connected to the discharge outlet 11; The grain conveyor pipe 3 has its inlet connected to the outlet of the grain auger assembly 2, and its outlet is connected to the grain box assembly 31. The blowing fan assembly 4 has its blowing port connected to the discharge port of the grain auger assembly 2 and the inlet of the grain elevator pipe 3.

[0021] The beneficial effects of this embodiment are as follows: During use, the threshed sunflower seeds fall into the sieve box 1 from the upper opening of the sieve box 1. The seeds are separated from impurities in the sieve box 1 and enter the seed auger assembly 2 from the discharge port 11 of the sieve box 1. Under the push of the seed auger assembly 2, the seeds are gradually discharged from the discharge port of the seed auger assembly 2. At the same time, the operating seed blowing fan assembly 4 blows air into the seed elevator pipe 3, blowing the sunflower seeds discharged from the discharge port of the seed auger assembly 2 into the seed elevator pipe 3, and then into the seed box assembly 31 through the seed elevator pipe 3 for collection. This achieves wind-powered grain collection. Compared with the existing technology that uses an auger or scraper to scrape upwards to collect grain, this method can reduce the problem of scratches or even shell breakage of seeds in the existing sunflower seed harvesting method, and ensure the quality of the harvested seeds.

[0022] In this embodiment of the utility model, the specific structure and working principle of the grain auger assembly 2 are commonplace, and they are all conventional means or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0023] Example 2 like Figures 1-4 Based on Example 1, the grain collection structure of this utility model also includes a cleaning fan assembly 5 and an exhaust pipe 51 with one end connected to the air outlet of the cleaning fan assembly 5. The upper end of the sieve box 1 away from the exhaust pipe 51 is provided with a waste discharge port 12, and the air outlet of the exhaust pipe 51 faces the waste discharge port 12.

[0024] The beneficial effect of the preferred solution in the above embodiments is that when the threshed sunflower seeds fall into the screen box 1 from the upper opening, the cleaning fan assembly 5 is activated and blows air from the exhaust pipe 51 toward the impurity discharge port 12. During this process, the airflow needs to pass horizontally through the upper opening of the screen box 1, blowing impurities and shriveled seeds toward the impurity discharge port 12 and out of the impurity discharge port 12 to complete the cleaning operation. Meanwhile, the plump seeds enter the seed auger assembly 2 from the discharge port 11 of the screen box 1 for subsequent collection.

[0025] Example 3 like Figure 1 and Figure 2 Based on embodiments 1 and 2, the screen box 1 has a bottom plate 13 that connects the discharge port 11 and the impurity discharge port 12 simultaneously. The bottom plate 13 is inclined upward from the discharge port 11 toward the impurity discharge port 12.

[0026] The beneficial effect of adopting the preferred solution in the above embodiments is that, during the cleaning operation, the plump grains fall onto the bottom plate 13, and the grains can be guided by the bottom plate 13 which is inclined downward toward the discharge port 11, so as to quickly complete the grain collection. At the same time, the bottom plate 13 which is inclined upward toward the impurity discharge port 12 can form a blocking effect on the grains, preventing the grains from being blown out of the impurity discharge port 12.

[0027] Example 4 like Figure 1 and Figure 2 Based on embodiments 1-3, the base plate 13 includes a lower inclined section 131 connected to the discharge port 11 at its lower end, a middle inclined section 132 connected to the upper end of the lower inclined section 131 at its lower end, and an upper inclined section 133 connected to the upper end of the middle inclined section 132 at its lower end. The upper end of the upper inclined section 133 is connected to the waste discharge port 12. The inclination angles of the lower inclined section 131, the upper inclined section 133, and the middle inclined section 132 increase sequentially, and the middle inclined section 132 is closer to the waste discharge port 12 than the discharge port 11.

[0028] The beneficial effect of the preferred scheme in the above embodiments is that during the cleaning operation, the lower inclined section 131, the middle inclined section 132, and the upper inclined section 133 together form a receiving and guiding function for the grains. During this process, the middle inclined section 132, which is relatively closer to the discharge port 12, can form a barrier and blockage, preventing the grains falling on the lower inclined section 131 from being blown onto the upper inclined section 133 and discharged under the action of airflow. At the same time, during the process of blowing impurities and shriveled grains towards and out of the discharge port 12 through the cleaning blower assembly 5 and the exhaust pipe 51, the impurities fall onto the upper inclined section 133, and the impurities and shriveled grains on the upper inclined section 133 can be continuously discharged by the continuous airflow.

[0029] Example 5 like Figures 1-4 as well as Figure 6 Based on embodiments 1-4, the grain collection structure of this utility model also includes a waste auger assembly 6 with the feed inlet connected to the waste discharge outlet 12, a waste elevator assembly 61 with the feed inlet connected to the discharge outlet of the waste auger assembly 6, and a waste collection box 62 with the discharge outlet of the waste elevator assembly 61.

[0030] The beneficial effect of adopting the preferred solution in the above embodiments is that, during the cleaning operation, impurities and shriveled seeds can enter the impurity auger assembly 6 from the impurity discharge port 12, and be transported into the impurity collection box 62 by the impurity elevator assembly 61 for centralized processing.

[0031] In this embodiment of the invention, the specific structures and working principles of the waste auger assembly 6 and the waste elevator assembly 61 are commonplace, belonging to conventional methods or common knowledge, and will not be elaborated further here. Those skilled in the art can make arbitrary selections according to their needs or convenience. For simplicity, the waste elevator assembly 61 can be a scraper elevator or a spiral elevator, etc.

[0032] Example 6 like Figure 1 and Figure 2 Based on Examples 1-5, the grain collection structure of this utility model also includes a sieve plate 7, which is horizontally placed at the upper opening of the sieve box 1.

[0033] The beneficial effect of adopting the preferred solution in the above embodiments is that the falling grains are blocked by the sieve plate 7, so that the grains fall relatively evenly and enter the sieve box 1 for cleaning, thus ensuring the cleaning effect.

[0034] Example 7 like Figure 1 and Figure 2Based on embodiments 1-6, the sieve plate 7 is inclined, with its lower end close to the exhaust duct 51 and its upper end forming a waste discharge port 12 together with the sieve box 1. At least the middle and upper ends of the sieve plate 7 are located on the air outlet blowing path of the exhaust duct 51.

[0035] The beneficial effects of the preferred solution in the above embodiments are that the inclined arrangement of the sieve plate 7 allows the grains falling on it to roll automatically to a certain extent, reducing the accumulation of material. At the same time, at least the middle and upper ends of the sieve plate 7 are located on the air blowing path of the exhaust duct 51, so that the airflow formed by the air blown out of the exhaust duct 51 can blow towards the sieve plate 7, blowing the grains on the sieve plate 7 to form a fine turning effect, reducing blockage and improving the material leakage and uniformity effect.

[0036] Example 8 like Figures 5-8 This utility model also provides a sunflower harvester, including a grain collection structure as described in Examples 1-6, and further including a frame 8, a header 81, a bridge 82 connecting the feed end to the discharge port of the header 81, a tangential roller assembly 83 connecting the feed end to the discharge end of the bridge 82, and a longitudinal axial roller assembly 84 connecting the feed end to the discharge end of the tangential roller assembly 83. The grain collection structure, the bridge 82, the tangential roller assembly 83, and the longitudinal axial roller assembly 84 are all mounted on the frame 8. The frame 8 is also equipped with a vibrating conveyor assembly 85 located directly below the tangential roller assembly 83. The discharge end of the vibrating conveyor assembly 85 is connected to a screen plate 7, and the screen plate 7 is located directly below the longitudinal axial roller assembly 84.

[0037] The beneficial effect of adopting the preferred solution in the above embodiments is that, during sunflower harvesting, the position of the sunflower harvester header is adjusted so that the height of the front plane of the header 81 is lower than the height of the sunflower disc. The harvester moves forward and feeds the sunflower disc into the row-type sunflower header 81. After the sunflower disc is cut, it is discharged into the tangential flow drum assembly 83 through the bridge 82. The tangential flow drum assembly 83 performs preliminary threshing on the sunflower disc. The threshed sunflower seeds fall onto the vibrating conveyor assembly 85. The vibrating conveyor assembly 85 transports the sunflower seeds to the screen plate 7 for subsequent cleaning. At the same time, the tangential flow drum assembly 83 feeds the sunflower disc with threshed sunflower seeds into the longitudinal axial flow drum assembly 84. The longitudinal axial flow drum assembly 84 rubs and threshes the sunflower disc. The sunflower seeds fall onto the screen plate 7 through the gap between the concave plates of the longitudinal axial flow drum assembly 84 for subsequent cleaning.

[0038] An engine assembly is installed on the frame 8 to provide power. The hydraulic cylinder controls the bridge 82 to adjust its vertical position, thereby driving the sunflower machine cutter 81 and changing its vertical position so that the cutter 81 is lower than the height of the sunflower tray.

[0039] Based on the above embodiment, the header 81 is equipped with a stalk-pulling roller 811, a reel 812, and a feeding auger 813. The stalk-pulling roller 811 separates the stalk from the flower head, allowing the flower head to detach from the stalk and enter the subsequent processing stage. At the same time, the stalk is left in the field or guided to the straw processing device. The reel 812 keeps the plants upright and orderly, making it easier for the stalk-pulling roller to accurately grab the stalk. It also guides the plants into the working width of the harvester to avoid missed harvesting. The feeding auger 813 collects the scattered flower heads and evenly and continuously conveys them to the tangential drum assembly 83 to ensure that the material enters the threshing stage stably and prevents blockage.

[0040] The specific structures and working principles of the tangential flow drum assembly 83, the longitudinal axial flow drum assembly 84, and the vibrating conveyor assembly 85 are all commonplace and belong to conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0041] Example 9 like Figures 5-8 Based on embodiment 8, the sunflower harvester of this utility model also includes a dial roller assembly 86, a sunflower tray elevator 87, and a sunflower tray box 88, all mounted on the frame 8. The feed inlet of the dial roller assembly 86 is connected to the discharge outlet of the longitudinal axial flow roller assembly 84, the feed inlet of the sunflower tray elevator 87 is connected to the discharge outlet of the dial roller assembly 86, and the sunflower tray box 88 is connected to the discharge outlet of the sunflower tray elevator 87.

[0042] The beneficial effect of adopting the preferred solution in the above embodiments is that the threshed sunflower trays enter the tray roller assembly 86 through the longitudinal axial flow roller assembly 84, and are then transported to the sunflower tray elevator 87 through the tray roller assembly 86. The sunflower tray elevator 87 lifts the sunflower trays into the sunflower tray box 88 for storage.

[0043] In this embodiment of the invention, the specific structure and working principle of the dial roller assembly 86 and the sunflower disc elevator 87 are commonplace, belonging to conventional methods or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience. As a simple explanation, the sunflower disc elevator 87 can be a scraper elevator or a spiral elevator, etc. The figure shows a chain-climbing scraper elevator.

[0044] Example 10 like Figure 1 and Figure 8 Based on embodiments 8-9, the longitudinal axial flow drum assembly 84 includes a longitudinal axial flow drum 841 and a concave plate 842 both mounted on the frame 8. The concave plate 842 is spaced apart on the outside of the longitudinal axial flow drum 841 and forms a threshing chamber with the longitudinal axial flow drum 841 that communicates with the discharge end of the tangential flow drum assembly 83.

[0045] The beneficial effect of the preferred scheme in the above embodiments is that the material after preliminary threshing by the tangential flow drum assembly 83 enters the threshing chamber formed by the longitudinal axial flow drum 841 and the concave plate 842 from the discharge end. The high-speed rotation of the longitudinal axial flow drum 841 generates spiral propulsion force and centrifugal force, causing the material to move spirally along the axis in the threshing chamber and rub and squeeze against the concave plate 842, thereby achieving secondary separation of the grains from the flower disc / stem. The sieve holes of the concave plate 842 allow the grains to pass through and fall onto the sieve plate 7, while the unthreshed material continues to move with the drum until it is discharged, thus completing efficient threshing and separation.

[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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 grain gathering structure, characterized by, include: The screen box (1) has an open top structure and a discharge port (11) is provided through the bottom. The grain auger assembly (2) has its inlet connected to the discharge port (11); The grain elevator pipe (3) has its inlet connected to the outlet of the grain auger assembly (2), and its outlet is connected to the grain box assembly (31). The blowing fan assembly (4) has its blowing port connected to the discharge port of the grain auger assembly (2) and the inlet of the grain elevator pipe (3).

2. The grain collecting structure according to claim 1, wherein It also includes a cleaning fan assembly (5) and an exhaust pipe (51) with one end connected to the air outlet of the cleaning fan assembly (5). The upper end of the screen box (1) away from the exhaust pipe (51) is provided with a waste discharge port (12), and the air outlet of the exhaust pipe (51) faces the waste discharge port (12).

3. The grain collecting structure according to claim 2, wherein The screen box (1) has a bottom plate (13) that connects the discharge port (11) and the waste discharge port (12) at the same time. The bottom plate (13) is inclined upward from the discharge port (11) toward the waste discharge port (12).

4. The grain collecting structure according to claim 3, wherein The base plate (13) includes a lower inclined section (131) connected to the discharge port (11) at its lower end, a middle inclined section (132) connected to the upper end of the lower inclined section (131) at its lower end, and an upper inclined section (133) connected to the upper end of the middle inclined section (132) at its lower end. The upper end of the upper inclined section (133) is connected to the waste discharge port (12). The inclination angles of the lower inclined section (131), the upper inclined section (133), and the middle inclined section (132) increase sequentially, and the middle inclined section (132) is closer to the waste discharge port (12) than the discharge port (11).

5. The grain collecting structure according to claim 2, wherein It also includes a waste auger assembly (6) whose feed inlet is connected to the waste discharge port (12), a waste elevator assembly (61) whose feed inlet is connected to the waste elevator assembly (6) outlet, and a waste collection box (62) connected to the waste elevator assembly (61) outlet.

6. The grain collecting structure according to any one of claims 2 to 5, wherein It also includes a sieve plate (7), which is placed horizontally at the upper opening of the sieve box (1).

7. The grain collecting structure according to claim 6, wherein The sieve plate (7) is inclined and its lower end is close to the exhaust pipe (51), and its upper end together with the sieve box (1) forms the discharge port (12). At least the middle and upper ends of the sieve plate (7) are located on the air outlet blowing path of the exhaust pipe (51).

8. A sunflower harvester characterised by, The grain collection structure as described in claim 6 further includes a frame (8), a header (81), a bridge (82) with its feed end connected to the discharge port of the header (81), a tangential roller assembly (83) with its feed end connected to the discharge end of the bridge (82), and a longitudinal axial roller assembly (84) with its feed end connected to the discharge end of the tangential roller assembly (83). The grain collection structure, the bridge (82), the tangential roller assembly (83), and the longitudinal axial roller assembly (84) are all mounted on the frame (8). The frame (8) is also equipped with a vibrating conveyor assembly (85) located directly below the tangential roller assembly (83). The discharge end of the vibrating conveyor assembly (85) is connected to the sieve plate (7), and the sieve plate (7) is located directly below the longitudinal axial roller assembly (84).

9. A sunflower harvester according to claim 8, characterised in that, It also includes a dial roller assembly (86), a sunflower tray lifter (87), and a sunflower tray box (88), all mounted on the frame (8). The feed inlet of the dial roller assembly (86) is connected to the discharge outlet of the longitudinal axial flow roller assembly (84), the feed inlet of the sunflower tray lifter (87) is connected to the discharge outlet of the dial roller assembly (86), and the sunflower tray box (88) is connected to the discharge outlet of the sunflower tray lifter (87).

10. A sunflower harvester according to claim 8, characterised in that, The longitudinal axial flow drum assembly (84) includes a longitudinal axial flow drum (841) and a concave plate (842) both mounted on the frame (8). The concave plate (842) is spaced apart on the outside of the longitudinal axial flow drum (841) and forms a threshing chamber with the longitudinal axial flow drum (841) that communicates with the discharge end of the tangential flow drum assembly (83).

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