Roller seeder

Abstract

The utility model provides a roller seeding machine which comprises a support, a main conveying belt is arranged on the support, and a soil filling mechanism, a hole pressing mechanism and a seeding mechanism are arranged above the main conveying belt. The soil filling mechanism is located at the end of the support, materials are conveyed to the soil filling bin above the main conveying belt from the soil containing bin at the bottom of the main conveying belt through the soil conveying assembly, and the conveying plane of the materials is perpendicular to the conveying plane of the main conveying belt. The seeding mechanism comprises a liftable fixed frame, a rotatable roller, a movable part and a scraper, seed suction holes in the roller adsorb seeds due to a negative pressure environment, and when the seed suction holes rotate to the lowest position of the roller, the movable part is pushed to move towards the inner wall of the roller and clings to and covers a row of seed suction holes, so that the negative pressure environment of the seed suction holes is relieved, the seeds fall off, and then the seeds are sown. And the seeds on the seed suction holes are scraped off through the scraping plate, so that the seeds are ensured to fall into the hole tray. The roller seeder solves the technical problems of non-uniform seeding, seed miss-seeding and incapability of adapting to hole trays with different heights in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of seedling seeding machine technology, specifically to a drum seeder. Background Technology

[0002] In modern agricultural production, seedling planters are key equipment for improving planting efficiency and crop quality, and their level of automation and intelligence directly affects the benefits of agricultural production. Existing seedling planters typically integrate a series of operations such as tray conveying, subsoil filling, hole pressing, sowing, soil covering, and watering, aiming to achieve continuous and standardized seedling operations through mechanization, thereby significantly improving seedling efficiency and survival rate.

[0003] While roller-type adsorption seeding allows for integrated operations, the negative pressure environment prevents the adsorbed seeds from falling into the seed trays promptly, leading to uneven or missed sowing and affecting seeding quality. Furthermore, the height of related devices in existing seeders during the pressing, sowing, and covering stages is typically fixed, making it impossible to adjust for different seed tray models and heights. This fixed design limits the applicability of the seeder and makes it difficult to meet the diverse production needs of modern agriculture.

[0004] Therefore, existing technologies need further development. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a drum seeder to solve the technical problems of uneven sowing, missed sowing, and inability to adapt to seed trays of different heights in related technologies.

[0006] To achieve the above technical objectives, this utility model adopts the following technical solution: A roller seeder is provided, comprising: a support frame, on which a main conveyor belt for conveying seedling trays is mounted; above the main conveyor belt, a soil filling mechanism, a hole pressing mechanism, and a sowing mechanism are sequentially arranged in the conveying direction; the soil filling mechanism is located at the end of the support frame and includes a soil loading bin, a soil conveying component, and a soil filling bin; material is conveyed from the soil loading bin at the bottom of the main conveyor belt to the soil filling bin above the main conveyor belt via the soil conveying component, and its conveying plane is perpendicular to the conveying plane of the main conveyor belt; the sowing mechanism includes a liftable fixed frame mounted on the support frame, a rotatable roller mounted on the fixed frame, a movable component with a cavity structure located inside the roller, and a scraper located outside the roller; the seed suction holes on the roller adsorb seeds due to a negative pressure environment; when the seed suction holes rotate to the lowest point of the roller, the movable component is pushed towards the inner wall of the roller and fits against it, covering a row of seed suction holes, thereby relieving the negative pressure environment of the seed suction holes and causing the seeds to fall; the scraper then scrapes away the seeds on the seed suction holes, ensuring that the seeds fall into the seedling trays.

[0007] Furthermore, the sowing mechanism also includes a hanging rod, one end of which is fixed to a fixed frame and the other end extends outward. The hanging rod and the roller are arranged in parallel. One end of the scraper is suspended on the hanging rod and the other end extends towards the bottom of the roller.

[0008] Furthermore, the seeding mechanism also includes a positive pressure pipeline that passes through the movable part and injects gas into the cavity of the movable part. As the air pressure in the cavity increases, it pushes the seeds in the seed suction hole to fall out.

[0009] Furthermore, the seeding mechanism is also equipped with a first lifting assembly, which includes a lifting rod and a support plate. The support plate is fixed on the bracket, and the lifting rod is connected to the fixed frame. The lifting rod can be raised and lowered relative to the support plate, thereby driving the roller on the fixed frame to move up and down and adjust the height of the roller.

[0010] Furthermore, the lifting rod is threadedly connected to the support plate, and rotating the lifting rod causes the fixed frame to move up and down.

[0011] Furthermore, the fixed frame is provided with a sliding groove, and the support plate is provided with a slider that matches the sliding groove. When the lifting rod moves the fixed frame up and down, the slider slides in the sliding groove.

[0012] Furthermore, the first lifting assembly also includes multiple fasteners that pass through the fixing frame and enter the slide groove to fix the slider, thereby reinforcing the connection between the fixing frame and the support plate.

[0013] Furthermore, the first lifting assembly also includes a wedge block located within a slide groove. Multiple fasteners are arranged along the length of the wedge block. Adjusting the fasteners to press against the wedge block secures the slider within the slide groove.

[0014] Furthermore, the cavitation cylinder of the cavitation mechanism is detachably mounted on the support.

[0015] Furthermore, a roller brush assembly is provided between the filling mechanism and the cavitation mechanism. The roller brush assembly includes a support frame and a rotatable roller brush inside the support frame. The cavity trays from the filling chamber are scraped flat by the roller brush, so that the material in the cavity trays is evenly spread. A second lifting assembly is provided at both ends of the support frame. The second lifting assembly includes a fixed seat and a threaded rod. The fixed seat is set on the bracket, and the threaded rod is connected to the support frame and threadedly connected to the fixed seat. Rotating the threaded rod drives the roller brush assembly to move up and down, thereby adjusting the distance between the roller brush and the bracket.

[0016] Beneficial effects:

[0017] 1. The roller seeder of this utility model, through the action of moving parts, seed suction holes and scraper, ensures that the seeds can fall in time and accurately when rotating to the lowest point of the roller, avoiding the problem of uneven seed sowing or missed sowing caused by negative pressure environment, thereby improving the sowing quality and crop survival rate.

[0018] 2. By setting up the first lifting component, the height of the sowing mechanism is adjustable, allowing it to be adjusted according to different models and heights of seed trays, greatly expanding the applicability of the seeder and meeting the needs of diversified production in modern agriculture.

[0019] 3. The design of the slide, slider, fastener and wedge in the first lifting assembly not only ensures the smoothness and accuracy of the lifting process, but also improves the stability and durability of the entire sowing mechanism and extends the service life of the equipment through reinforced connection. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the drum seeder used in this embodiment of the utility model from one perspective;

[0021] Figure 2 This is a schematic diagram of the drum seeder used in an embodiment of the present invention from another perspective;

[0022] Figure 3 This is a cross-sectional view of the soil delivery component used in this embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the seeding mechanism used in an embodiment of this utility model;

[0024] Figure 5 This is a schematic diagram of the internal structure of the drum of the sowing mechanism used in this embodiment of the utility model;

[0025] Figure 6 This is a schematic diagram of the connecting block of the sowing mechanism used in an embodiment of this utility model;

[0026] Figure 7 yes Figure 2 A magnified view of part A in the middle;

[0027] Figure 8 yes Figure 1 A magnified view of part B in the middle section.

[0028] The above figures include the following reference numerals:

[0029] 1. Support frame; 11. Main conveyor belt; 2. Soil filling mechanism; 21. Soil loading bin; 211. Soil conveying conveyor belt; 212. Flow limiting plate; 22. Soil conveying assembly; 221. Feed hopper; 222. Chain; 223. Discharge port; 23. Soil filling bin; 3. Seeding mechanism; 31. Fixing frame; 311. Slide; 32. Roller; 321. Seed suction hole; 33. Moving parts; 34. Scraper; 35. Hanging rod; 36. Receiving plate; 37. Fixing cylinder; 381. Connecting block; 3811. First through hole; 3812. Ventilation groove; 3813. Second through hole; 382. Elastic pad; 3821. Third through hole; 383. Limiting block; 3831. Limiting groove; 384. Fixing block; 3841. Fourth through hole; 385. Fastener; 4. First lifting assembly; 41. Lifting rod; 42. Support plate; 421. Slider; 43. Fastener; 44. Wedge block; 5. Cavitation mechanism; 51. Cavitation cylinder; 6. Roller brush assembly; 7. Second lifting assembly; 71. Fixing seat; 72. Threaded rod; 8. Soil covering mechanism; 9. Sprinkling mechanism. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0031] According to an embodiment of this utility model, a drum seeder is provided. Please refer to [link / reference]. Figures 1 to 8The system includes: a support frame 1, on which a main conveyor belt 11 for conveying seedling trays is mounted; above the main conveyor belt 11, a soil filling mechanism 2, a hole pressing mechanism 5, and a sowing mechanism 3 are arranged sequentially in the conveying direction; the soil filling mechanism 2 is located at the end of the support frame 1 and includes a soil loading bin 21, a soil conveying component 22, and a soil filling bin 23; material is conveyed from the soil loading bin 21 at the bottom of the main conveyor belt 11 to the soil filling bin 23 above the main conveyor belt 11 via the soil conveying component 22, and its conveying plane is perpendicular to the conveying plane of the main conveyor belt 11; the sowing mechanism 3 includes a liftable fixed component mounted on the support frame 1. The system comprises a fixed frame 31, a rotatable roller 32 mounted on the fixed frame 31, a movable component 33 with a cavity structure located inside the roller 32, and a scraper 34 located outside the roller 32. Seed suction holes 321 on the roller 32 adsorb seeds due to a negative pressure environment. When the seed suction holes 321 rotate to the lowest point of the roller 32, the movable component 33 is pushed towards the inner wall of the roller 32 and fits against it, covering a row of seed suction holes 321, thereby relieving the negative pressure environment of the seed suction holes 321 and causing the seeds to fall. The scraper 34 then scrapes away the seeds from the seed suction holes 321, ensuring that the seeds fall into the seed tray. In the soil filling mechanism 2, the soil filling bin 21 stores materials, and the soil conveying component 22 conveys the materials to the soil filling bin 23. The conveying plane of the soil conveying component 22 is perpendicular to the conveying plane of the main conveyor belt 11, meaning that the conveying direction of the soil conveying component 22 is perpendicular to the conveying plane of the main conveyor belt 11 and will not extend laterally to obstruct the view on both sides of the support 1. In this way, the operator can clearly observe the entire sowing process while the seeder is working, including the conveying of seed trays, the filling of materials, and the sowing of seeds, thus enabling timely detection and resolution of problems. The seed suction holes 321 on the roller 32 adsorb seeds due to the negative pressure environment. When the roller rotates to its lowest position, the moving part 33 is pushed against the inner wall of the roller 32, covering a row of seed suction holes 321, releasing the negative pressure environment and causing the seeds to fall. This process achieves precise seed sowing, avoiding seed waste and misplacement. The scraper 34 further ensures the accuracy of sowing; it scrapes away any remaining seeds on the seed suction holes 321, preventing seeds from being missed or falling into the wrong seed tray holes. The adjustable height of the fixed frame 31 means that the height of the roller 32 from the main conveyor belt 11 is adjustable, thus adapting to seed trays of different heights. The roller seeder of this embodiment solves the technical problems of uneven sowing, missed seed sowing, and inability to adapt to seed trays of different heights in related technologies.

[0032] See Figure 3In this embodiment, the soil loading bin 21 is used to hold soil, and the soil conveying assembly 22 includes multiple feeding hoppers 221 and a chain 222. The feeding hoppers 221 are used to scoop up soil, and the chain 222 conveys the soil-filled feeding hoppers 221, which are spaced apart, from the lower soil loading bin 21 to the higher discharge port 223, where the soil falls into the filling bin 23. A flow limiting plate 212 divides the soil loading bin 21 into two, transporting the soil to the soil loading bin 21 farther away from the soil conveying assembly 22. The soil accumulates in this soil loading bin 21, and then is transported by the lower soil conveying conveyor belt 211 to the soil loading bin 21 closer to the soil conveying assembly 22. The flow limiting plate 212 ensures that the accumulated soil is evenly conveyed when entering the other soil loading bin 21, so that the feeding hoppers 221 can evenly scoop up soil and send it into the filling bin 23, allowing the filling bin 23 to evenly fill the seed trays with soil.

[0033] See Figure 4 In this embodiment of the roller seeder, the sowing mechanism 3 also includes a hanging rod 35. One end of the hanging rod 35 is fixed to the fixing frame 31, and the other end extends outward. The hanging rod 35 and the roller 32 are arranged parallel to each other. One end of the scraper 34 is suspended on the hanging rod 35, and the other end extends towards the bottom of the roller 32. The design of the hanging rod 35 and the scraper 34 allows them to be maintained and replaced relatively independently. The scraper 34 is provided with a receiving tray 36 for catching seeds that fail to fall in time. When the scraper 34 is worn or damaged, the operator can easily remove it from the hanging rod 35 for replacement without disassembling the entire sowing mechanism. This greatly reduces maintenance costs and time costs.

[0034] See Figure 5 In this embodiment of the roller seeder, the seeding mechanism 3 also includes a positive pressure pipe that passes through the movable member 33 and injects gas into the cavity of the movable member 33. As the air pressure in the cavity increases, it pushes the seeds in the seed suction holes 321 to fall out. When the movable member 33 moves against the inner wall of the roller 32 under the thrust, it covers a row of seed suction holes 321, thereby relieving the negative pressure environment of the seed suction holes 321. After the negative pressure is relieved, the seeds in each seed suction hole 321 fall out under the action of gravity. The introduction of the positive pressure pipe allows the seed suction holes 321 to still be subjected to positive pressure, further promoting seed falling. This helps to reduce seed omissions and makes the sowing results more uniform.

[0035] See Figure 5 and Figure 6In this embodiment, the sowing mechanism 3 further includes a fixed cylinder 37, a connecting block 381, an elastic pad 382, ​​a limiting block 383, and a fixing block 384. The fixed cylinder 37 is fixed inside the roller 32. The thickness of the fixing block 384 is less than the thickness of the movable part 33, making the movable part 33 form a cavity structure. The elastic pad 382 is a silicone pad, and the movable part 33 is an annular wear-resistant nylon strip. The fixed cylinder 37, connecting block 381, elastic pad 382, ​​limiting block 383, and fixing block 384 are connected sequentially using fasteners 385. A limiting groove 3831 is provided in the limiting block 383, and the fixing block 384 is located in the limiting groove 3831, forming a movable sliding groove between the fixing block 384 and the limiting block 383. The movable part 33 is located in the movable sliding groove. The connecting block 381 is provided with a first through hole 3811 and a ventilation groove 3812, and the ventilation groove 3812 matches the shape of the movable part 33. By filling the first through hole 3811 with gas, the gas enters the ventilation groove 3812, causing the silicone pad in the ventilation groove 3812 to deform and bulge, thereby pushing out the wear-resistant nylon strip, which then moves in the moving slide groove to fit against the inner wall of the roller 32.

[0036] See Figure 6 In this embodiment, the connecting block 381 is provided with a second through hole 3813, the elastic pad 382 is provided with a third through hole 3821, and the fixing block 384 is provided with a fourth through hole 3841. The second through hole 3813, the third through hole 3821, and the fourth through hole 3841 are connected. The positive pressure pipeline blows air into the second through hole 3813, so that the gas passes through the third through hole 3821 and the fourth through hole 3841 and enters the cavity of the movable part 33, thereby blowing off the seeds on the roller 32. Since the wear-resistant nylon strip is attached to the inner wall of the roller 32, there is no negative pressure at this time. After the gas in the positive pressure pipeline passes through the second through hole 3813, the third through hole 3821, and the fourth through hole 3841 in sequence and enters the cavity of the movable part 33, it blows directly onto the roller 32, causing the air pressure inside the cavity to increase, pushing the seeds on the seed suction hole 321 to fall off, thus completing the release of the seeds.

[0037] See Figure 7 In this embodiment of the roller seeder, the sowing mechanism 3 is further equipped with a first lifting assembly 4. The first lifting assembly 4 includes a lifting rod 41 and a support plate 42. The support plate 42 is fixed on the bracket 1, and the lifting rod 41 is connected to the fixed frame 31. The lifting rod 41 can be raised and lowered relative to the support plate 42, thereby driving the roller 32 on the fixed frame 31 to move up and down and adjust the height of the roller 32. Through the cooperation of the lifting rod 41 and the support plate 42, the height of the roller 32 can be precisely adjusted, thereby sowing seeds in seed trays of different heights.

[0038] See Figure 7In this embodiment of the roller seeder, the lifting rod 41 is threadedly connected to the support plate 42. Rotating the lifting rod 41 causes the fixed frame 31 to move up and down. The threaded connection design allows for fine-tuning by rotating the lifting rod, thereby achieving precise control of the roller height.

[0039] See Figure 7 In this embodiment of the roller seeder, the fixed frame 31 is provided with a sliding groove 311, and the support plate 42 is provided with a slider 421 that matches the sliding groove 311. When the lifting rod 41 moves the fixed frame 31 up and down, the slider 421 slides within the sliding groove 311. During the lifting process, the sliding of the slider 421 within the sliding groove 311 ensures that the fixed frame 31 moves up and down smoothly, avoiding swaying or deviation, thereby improving the stability of the entire seeder.

[0040] See Figure 7 In this embodiment of the roller seeder, the first lifting assembly 4 also includes a plurality of fasteners 43. The plurality of fasteners 43 pass through the fixing frame 31 and enter the slide groove 311, thereby fixing the slider 421 and reinforcing the connection between the fixing frame 31 and the support plate 42. The fasteners 43 passing through the fixing frame 31 and entering the slide groove 311 firmly fix the slider 421 in the slide groove, thereby greatly enhancing the stability of the connection between the fixing frame 31 and the support plate 42.

[0041] See Figure 7 In this embodiment of the roller seeder, the first lifting assembly 4 further includes a wedge 44 located within a slide groove 311. Multiple fasteners 43 are arranged along the length of the wedge 44. Adjusting the fasteners 43 to press against the wedge 44 securely fixes the slider 421 within the slide groove 311. The wedge 44's location within the slide groove 311, combined with the fasteners 43 pressing against it, allows the slider 421 to be more firmly fixed within the slide groove.

[0042] See Figure 1 and Figure 2 In this embodiment of the roller seeder, the pressing cylinder 51 of the pressing mechanism 5 is detachably mounted on the support 1, so that the pressing cylinder 51 that matches the height of the seed tray and the shape of the seed tray holes can be selected. A soil covering mechanism 8 and a watering mechanism 9 are also provided behind the sowing mechanism 3. The seed trays after sowing are conveyed by the main conveyor belt 11 to the soil covering mechanism 8, which covers the seed trays with soil. Finally, the watering mechanism 9 performs a watering operation, thereby completing the automated sowing process.

[0043] See Figure 8In this embodiment of the roller seeder, a roller brush assembly 6 is also provided between the soil filling mechanism 2 and the hole pressing mechanism 5. The roller brush assembly 6 includes a support frame and a rotatable roller brush inside the support frame. The hole trays transmitted from the soil filling chamber 23 are scraped and leveled by the roller brush, so that the material in the hole trays is evenly spread. Second lifting assemblies 7 are provided at both ends of the support frame. The second lifting assembly 7 includes a fixed seat 71 and a threaded rod 72. The fixed seat 71 is mounted on the bracket 1, and the threaded rod 72 is connected to the support frame and threadedly connected to the fixed seat 71. Rotating the threaded rod 72 drives the roller brush assembly 6 to move up and down, thereby adjusting the distance between the roller brush and the bracket 1. The roller brush scrapes and levels the hole trays transmitted from the soil filling chamber 23, ensuring that the soil in the hole trays is evenly spread. The design of the second lifting assembly 7 allows the height of the roller brush to be finely adjusted according to actual needs.

[0044] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0045] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0046] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0047] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0048] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A drum seeder, characterized in that, include: The support (1) is provided with a main conveyor belt (11) for conveying seedling trays. Above the main conveyor belt (11) are a soil filling mechanism (2), a hole pressing mechanism (5) and a sowing mechanism (3) arranged in sequence according to the conveying direction. The filling mechanism (2) is located at the end of the support (1) and includes a filling bin (21), a soil conveying assembly (22) and a filling bin (23). The material is conveyed from the filling bin (21) at the bottom of the main conveyor belt (11) to the filling bin (23) above the main conveyor belt (11) through the soil conveying assembly (22), and its conveying plane is perpendicular to the conveying plane of the main conveyor belt (11). The sowing mechanism (3) includes a movable fixed frame (31) mounted on the support (1), a rotatable roller (32) mounted on the fixed frame (31), a movable movable part (33) with a cavity structure located inside the roller (32), and a scraper (34) located outside the roller (32). The seed suction holes (321) on the roller (32) adsorb seeds due to the negative pressure environment. When the seed suction holes (321) rotate to the lowest point of the roller (32), the movable part (33) is pushed towards the inner wall of the roller (32) and fits against it, covering a row of seed suction holes (321), thereby relieving the negative pressure environment of the seed suction holes (321) and causing the seeds to fall. The seeds on the seed suction holes (321) are then scraped off by the scraper (34) to ensure that the seeds fall into the seed tray.

2. The drum seeder according to claim 1, characterized in that, The sowing mechanism (3) also includes a hanging rod (35), one end of which is fixed on the fixed frame (31) and the other end extends outward. The hanging rod (35) and the roller (32) are arranged in parallel. One end of the scraper (34) is suspended on the hanging rod (35) and the other end extends towards the bottom of the roller (32).

3. The drum seeder according to claim 2, characterized in that, The seeding mechanism (3) also includes a positive pressure pipeline that passes through the movable part (33) and injects gas into the cavity of the movable part (33). As the air pressure in the cavity increases, it pushes the seeds in the seed suction hole (321) to fall out.

4. The drum seeder according to claim 1, characterized in that, The seeding mechanism (3) is also provided with a first lifting component (4), which includes a lifting rod (41) and a support plate (42). The support plate (42) is fixed on the bracket (1). The lifting rod (41) is connected to the fixed frame (31). The lifting rod (41) can be raised and lowered relative to the support plate (42), thereby driving the roller (32) on the fixed frame (31) to move up and down and adjust the height of the roller (32).

5. The drum seeder according to claim 4, characterized in that, The lifting rod (41) is threadedly connected to the support plate (42). Rotating the lifting rod (41) causes the fixed frame (31) to move up and down.

6. The drum seeder according to claim 5, characterized in that, The fixed frame (31) is provided with a sliding groove (311), and the support plate (42) is provided with a slider (421) that is adapted to the sliding groove (311). When the lifting rod (41) drives the fixed frame (31) to move up and down, the slider (421) slides in the sliding groove (311).

7. The drum seeder according to claim 6, characterized in that, The first lifting assembly (4) also includes a plurality of fasteners (43), which pass through the fixing frame (31) and enter the slide groove (311) to fix the slider (421) and reinforce the connection between the fixing frame (31) and the support plate (42).

8. The drum seeder according to claim 7, characterized in that, The first lifting assembly (4) also includes a wedge (44), which is located in the slide groove (311). A plurality of fasteners (43) are arranged along the length direction of the wedge (44). The fasteners (43) are adjusted to press against the wedge (44), thereby fixing the slider (421) in the slide groove (311).

9. The drum seeder according to claim 1, characterized in that, The cavitation cylinder (51) of the cavitation mechanism (5) is detachably mounted on the bracket (1).

10. The drum seeder according to claim 1, characterized in that, A roller brush assembly (6) is also provided between the filling mechanism (2) and the cavitation mechanism (5). The roller brush assembly (6) includes a support frame and a rotatable roller brush inside the support frame. The cavity trays transmitted from the filling chamber (23) are scraped flat by the roller brush, so that the material in the cavity trays is evenly spread. The support frame is provided with a second lifting component (7) at both ends. The second lifting component (7) includes a fixed seat (71) and a threaded rod (72). The fixed seat (71) is set on the bracket (1). The threaded rod (72) is connected to the support frame. The threaded rod (72) is threadedly connected to the fixed seat (71). Rotating the threaded rod (72) drives the roller brush assembly (6) to move up and down, thereby adjusting the distance between the roller brush and the bracket (1).

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