A multi-functional internally filled seed metering device

Abstract

This invention relates to the field of agricultural machinery technology, specifically a multifunctional internally filled seed metering device. It includes a seed metering device housing, a seed metering wheel rotatably mounted within the housing's inner cavity, a seed metering port on the lower side wall of the housing, and several circumferentially distributed seed metering holes on the side wall of the seed metering wheel, each hole matching the seed metering port as the wheel rotates. A seed guide tube, communicating with the lower right side wall of the housing, is installed therewith, its opening facing upwards. An arc-shaped limiting plate is fixed within the housing's inner cavity, with a flexible seed scraping tongue mounted at one end. The bottom end of the flexible seed scraping tongue rolls in contact with the inner side wall of the seed metering wheel. This invention achieves high-speed seed sowing under the combined action of its own weight and centrifugal force, improving sowing efficiency. Furthermore, by replacing the seed metering wheels with different specifications, it can meet the sowing requirements of different crops, achieving multi-purpose functionality.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically a multifunctional internally filled seed metering device. Background Technology

[0002] The seed metering device is the core component of a seeder and greatly affects its working quality. Most seeders currently on the market have the disadvantage of single-function operation, only suitable for sowing a single crop. For example, cotton seeders can only sow cotton seeds, and wheat seeders can only sow wheat seeds, which cannot meet the sowing requirements of miscellaneous grain crops. The very few multi-purpose seed metering devices have the disadvantage of complex structure.

[0003] Therefore, designing a multifunctional inner-side seed metering device has become an urgent requirement for the sowing of miscellaneous grain crops, and is of great significance for meeting the urgent needs of production and improving the level of agricultural mechanization in crop production. Summary of the Invention

[0004] To address the problems of limited performance and complex structure in existing seed metering devices, this invention provides a multifunctional internally filled seed metering device.

[0005] This invention is achieved using the following technical solution:

[0006] A multifunctional internally filled seed metering device includes a seed metering housing fixedly installed on a seeder and open on the left side. A seed metering wheel with its right end open is rotatably mounted in the inner cavity of the seed metering housing. A seed metering port is opened on the lower part of the side wall of the seed metering housing. A seed metering cylinder matching the seed metering port is fixed on the outer wall of the seed metering housing. Several seed metering holes are evenly distributed circumferentially on the side wall of the seed metering wheel, and each seed metering hole matches the seed metering port during the rotation of the seed metering wheel. A seed guide tube communicating with the lower part of the right side wall of the seed metering housing is installed thereon, and the opening of the seed guide tube faces upward. An arc-shaped limiting plate is fixed in the inner cavity of the seed metering housing. A flexible seed scraping tongue is installed at one end of the arc-shaped limiting plate, and the bottom end of the flexible seed scraping tongue makes rolling contact with the inner side wall of the seed metering wheel.

[0007] Furthermore, the arc-shaped limiting plate divides the inner cavity of the seed metering wheel into an empty area at the top and a filling area at the bottom. The area of ​​the seed metering port is the seed metering area, and the area between the filling area and the seed metering area is the seed protection area. Seeds enter the filling area through the seed guide tube, enter the seed metering hole under the action of gravity, and pass through the seed protection area as the seed metering wheel rotates. When the seed metering hole coincides with the seed metering port, the seeds enter the seed metering area and are discharged through the seed metering port under the action of gravity and centrifugal force. The angle between the filling area and the center of the seed metering wheel is 32°, the angle between the seed protection area and the center of the seed metering wheel is 14°, and the angle between the seed metering area and the center of the seed metering wheel is 21°.

[0008] Furthermore, an installation ring is integrally fixed to the inner cavity of the seed metering device housing, a transmission sprocket is fixedly installed at the left end of the seed metering wheel, a seed metering shaft passing through the installation ring is fixed at the middle of the right end of the transmission sprocket, a bearing is installed between the seed metering shaft and the installation ring, the inner ring of the bearing is fixedly connected to the seed metering shaft, and the outer ring is fixedly connected to the installation ring; the transmission sprocket is connected to the walking drive device on the seeder.

[0009] Furthermore, the seed metering device housing and the seed metering wheel are both cylindrical structures; the seed metering device housing and the seeder frame, as well as the seed metering device housing and the arc-shaped limiting plate, are all fixedly connected by bolts; the bearing is a ball bearing.

[0010] Furthermore, the distance between the inner wall of the seed metering device housing and the outer wall of the seed metering wheel is 0.15mm~0.25mm; the diameter of the bottom end of the seed guide tube is 35mm, and the size of the arc-shaped limiting plate matches the diameter of the bottom end of the seed guide tube; the seed metering port is rectangular in shape with a diameter of 20mm*40mm.

[0011] Furthermore, the seeding reel includes, but is not limited to, corn seeding reels, buckwheat seeding reels, oat seeding reels, sorghum seeding reels, and millet seeding reels;

[0012] The corn seed metering wheel has ten seed metering holes in one row, and the diameter of each seed metering hole on each corn seed metering wheel is 15mm.

[0013] The buckwheat seed metering wheel has two rows of seed metering holes distributed along the left and right sides, with ten holes in each row. The distance between the two rows of seed metering holes is 30mm, and the diameter of the seed metering hole on each buckwheat seed metering wheel is 8mm.

[0014] The oat seeding reel has sixteen seeding holes in one row, and each seeding hole on the oat seeding reel is a long hole of 6mm*30mm.

[0015] The seeding holes on the sorghum seed metering wheel are arranged in a row of ten, and the diameter of the seeding holes on each sorghum seed metering wheel is 6mm.

[0016] The millet seed metering wheel has ten seed holes in a row, and the diameter of each seed hole on the millet seed metering wheel is 3.5 mm.

[0017] Furthermore, seed metering wheels and seed metering device housings of different specifications and models can be made according to the diameter of the seeds and the sowing method. Sowing methods include hill sowing, row sowing, and wide-width uniform sowing.

[0018] When using hill seeding, the distance between two adjacent seed holes on the seed metering wheel is greater than the width of the seed metering opening; hill seeding is divided into single-row hill seeding and double-row hill seeding on wide ridges; single-row hill seeding can be achieved when using a single-row seed metering wheel; double-row hill seeding on wide ridges can be achieved when using a double-row seed metering wheel.

[0019] When using row seeding, the distance between two adjacent seeding holes on the seed metering wheel is less than the width of the seeding opening; single-row row seeding can be achieved; when the seeding holes are long strip structures, wide-width uniform seeding can be achieved.

[0020] The beneficial effects of this invention are:

[0021] 1. Multifunctional internally filled seed metering device: The seed metering device housing is fixedly connected to the frame of the seeder by bolts and nuts, so that the seed metering device can be used with the seeder. The seed metering device housing and the seed metering wheel are matched and snapped together to form a seed storage space. During the rotation of the seed metering wheel, centrifugal force is used to throw the seeds to the edge of the seed metering wheel and into the seed metering hole. When the seed metering hole and the seed metering opening are aligned, the seeds can be discharged, and the sowing is completed.

[0022] 2. The multi-functional inner-fill seed metering device features an arc-shaped limiting plate that prevents a large number of seeds from entering the seed metering wheel. When the seed metering wheel rotates, the arc-shaped limiting plate remains stationary, thus confining the seeds within the filling area, reducing the contact area between the seeds and the seed metering wheel, and minimizing seed damage. Without the arc-shaped limiting plate, seeds entering the seed metering wheel would move in a circular motion under centrifugal force. At this time, the seeds would be stationary relative to the seed metering wheel and would not be able to enter the seed metering holes, thus preventing effective sowing. Therefore, the structural design of the arc-shaped limiting plate helps the seeds escape the effect of centrifugal force, preventing seed damage and improving seed metering performance.

[0023] 3. The multi-functional inner-fill seed metering device can meet the sowing requirements of crops such as corn, buckwheat, oats, sorghum, and millet by changing the seed metering wheels with different sizes of seed metering holes. The number and shape of the seed metering holes can also realize sowing modes such as single-row hole sowing, single-row strip sowing, double-row hole sowing, and wide-width uniform sowing, so that one device can achieve two rows and multiple uses.

[0024] 4. Multifunctional inner-side filling seed metering device: The seed metering wheel is filled with seeds from the inside to the outside. With the help of the seed's own gravity and centrifugal force, high-speed seed metering can be achieved, improving production efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention.

[0026] Figure 2 This is a side view schematic diagram of the present invention.

[0027] Figure 3 This is a schematic diagram of the corn seeding reel in this invention.

[0028] Figure 4 This is a side view of the corn seeding reel in this invention.

[0029] Figure 5 This is a schematic diagram of the buckwheat seeding reel in this invention.

[0030] Figure 6 This is a side view of the buckwheat seeding reel in this invention.

[0031] Figure 7 This is a schematic diagram of the oat seeding reel in this invention.

[0032] Figure 8 This is a side view of the oat seeding reel in this invention.

[0033] Figure 9 This is a schematic diagram of the seed metering hole of the oat seed metering wheel in this invention.

[0034] Figure 10 This is a schematic diagram of the sorghum seeding wheel in this invention.

[0035] Figure 11 This is a side view of the sorghum seeding reel in this invention.

[0036] Figure 12 This is a schematic diagram of the millet seed reel in this invention.

[0037] Figure 13 This is a side view of the millet seed reel in this invention.

[0038] Figure 14 This is a schematic diagram showing the state of the seed metering wheel and the seed metering device housing during hole sowing in this invention.

[0039] Figure 15 This is a schematic diagram showing the state of the seed metering wheel and the seed metering device housing when using strip seeding in this invention.

[0040] In the diagram: 1-Seed metering device housing, 2-Seed metering wheel, 3-Seed metering port, 4-Seed metering cylinder, 5-Seed metering hole, 6-Seed guide tube, 7-Arc-shaped limiting plate, 8-Flexible scraping tongue, 9-Mounting ring, 10-Drive sprocket, 11-Seed metering shaft, 12-Bearing. Detailed Implementation

[0041] A multi-functional internally filled seed metering device, as shown in the attached image. Figure 1 Appendix Figure 2As shown, the device includes a seed metering housing 1 fixedly mounted on a seeder and open on the left side. A seed metering wheel 2 with its right end open is rotatably mounted inside the seed metering housing 1. A seed metering port 3 is opened on the lower part of the side wall of the seed metering housing 1. A seed metering cylinder 4 matching the seed metering port 3 is fixed on the outer side wall of the seed metering housing 1. Several seed metering holes 5 are evenly distributed circumferentially on the side wall of the seed metering wheel 2, and each seed metering hole 5 matches the seed metering port 3 during the rotation of the seed metering wheel 2. A seed guide tube 6 communicating with the lower part of the right side wall of the seed metering housing 1 is installed thereon, and the opening of the seed guide tube 6 faces upward. An arc-shaped limiting plate 7 is fixed inside the seed metering housing 1. A flexible seed scraping tongue 8 is installed at one end of the arc-shaped limiting plate 7. The bottom end of the flexible seed scraping tongue 8 rolls in contact with the inner side wall of the seed metering wheel 2.

[0042] This invention mainly includes a seed metering device housing 1, a seed metering wheel 2, a seed metering port 3, a seed metering cylinder 4, a seed metering hole 5, a seed guide tube 6, an arc-shaped limiting plate 7, and a flexible seed scraping tongue 8. The seed metering device housing 1 is fixedly connected to the frame of the seeder by bolts and nuts, so that the seed metering device can be used in conjunction with the seeder. The seed metering device housing 1 and the seed metering wheel 2 are matched and fastened to form a seed storage space. During the rotation of the seed metering wheel 2, the seeds can fall into the seed metering wheel 2 by using centrifugal force and the weight of the seeds and then enter the seed metering hole 5. When the seed metering hole 5 coincides with the seed metering port 3, the seeds can be discharged, and the sowing is completed. The seed guide tube 6 is the channel for the seeds to enter the seed metering wheel 2.

[0043] The arc-shaped limiting plate 7 can prevent a large number of seeds from entering the seed metering wheel 2. When the seed metering wheel 2 rotates, the arc-shaped limiting plate 7 remains stationary, thus confining the seeds within the seed filling area, reducing the contact area between the seeds and the seed metering wheel 2, and mitigating damage to the seeds. Without the arc-shaped limiting plate 7, the seeds entering the seed metering wheel 2 will move in a circular motion with the seed metering wheel 2 under the action of centrifugal force. At this time, the seeds are stationary relative to the seed metering wheel 2 and cannot enter the seed metering hole 5, thus making effective sowing impossible. Therefore, the structural design of the arc-shaped limiting plate 7 can confine the seeds within the seed filling area, prevent seed damage, and thus improve seed metering performance.

[0044] The flexible seed scraper tongue 8 is made of flexible material. The bottom end of the flexible seed scraper tongue 8 rolls in contact with the inner wall of the seed metering wheel 2. When the seed metering hole 5 carrying the seeds rotates to the position of the flexible seed scraper tongue 8, the flexible seed scraper tongue 8 can scrape the excess seeds in the seed metering hole 5 back into the seed filling area to achieve seed cleaning.

[0045] As attached Figure 2As shown, the arc-shaped limiting plate 7 divides the inner cavity of the seed metering wheel 2 into an empty area at the top and a filling area at the bottom. The area of ​​the seed metering port 3 is the seed metering area, and the area between the filling area and the seed metering area is the seed protection area. Seeds enter the filling area through the seed guide tube 6, enter the seed metering hole 5 under the action of gravity, and pass through the seed protection area as the seed metering wheel 2 rotates. When the seed metering hole 5 coincides with the seed metering port 3, the seeds enter the seed metering area and are discharged through the seed metering port 3 under the action of gravity and centrifugal force. The angle between the filling area and the center of the seed metering wheel 2 is 32°, the angle between the seed protection area and the center of the seed metering wheel 2 is 14°, and the angle between the seed metering area and the center of the seed metering wheel 2 is 21°.

[0046] During the rotation of the seed metering wheel 2, especially during high-speed rotation, considering the force on the seeds within the seed metering wheel 2, the seed metering port 3 is positioned 30° behind the seed filling area along the rotation direction of the seed metering wheel 2, and the seed metering port 3 is rectangular in shape (20mm*40mm) to ensure the smoothness of the sowing process.

[0047] During sowing, the seed metering device is first installed on the frame of the seeder, and the driving device of the seeder is connected to the seed metering wheel 2, so that the seed metering wheel 2 can rotate with the movement of the seeder and stop rotating when the seeder stops. Then, the seeds are poured into the seed guide tube 6 and fall into the seed metering wheel 2, reaching the seed filling area. The seeds at the bottom enter the seed metering hole 5 under the action of gravity and centrifugal force. As the seed metering wheel 2 rotates, when the seed metering hole 5 carrying the seeds rotates to the position of the flexible seed scraper tongue 8, the flexible seed scraper tongue 8 can scrape the excess seeds in the seed metering hole 5 back into the seed filling area. The seed metering wheel 2 continues to rotate, and the seed metering hole 5 carrying the seeds reaches the seed protection area. When the seed metering hole 5 carrying the seeds coincides with the seed metering port 3, it reaches the seed metering area. The seeds fall under the action of gravity and centrifugal force, and after passing through the seed metering cylinder 4, they fall into the soil, completing the sowing process.

[0048] As attached Figure 1 As shown, an installation ring 9 is integrally fixed in the inner cavity of the seed metering device housing 1. A transmission sprocket 10 is fixedly installed at the left end of the seed metering wheel 2. A seed metering shaft 11 passing through the installation ring 9 is fixed at the middle of the right end of the transmission sprocket 10. A bearing 12 is installed between the seed metering shaft 11 and the installation ring 9. The inner ring of the bearing 12 is fixedly connected to the seed metering shaft 11, and the outer ring is fixedly connected to the installation ring 9. The transmission sprocket 10 is connected to the walking drive device on the seeder.

[0049] The transmission sprocket 10 enables the drive device of the seeder to be connected to the seed metering wheel 2, so that the walking speed of the seeder is related to the rotation speed of the seed metering wheel 2, ensuring the uniformity of seed sowing. At the same time, with the cooperation of the arc-shaped limiting plate 7 and the flexible seed scraping tongue 8, the device can ensure the quality of sowing even when rotating at high speed, thus improving the sowing efficiency.

[0050] The seed metering device housing 1 and the seed metering wheel 2 are both cylindrical structures; the seed metering device housing 1 and the frame of the seeder, and the seed metering device housing 1 and the arc-shaped limiting plate 7 are all fixedly connected by bolts; the bearing 12 is a ball bearing.

[0051] The distance between the inner wall of the seed metering device housing 1 and the outer wall of the seed metering wheel 2 is 0.15mm~0.25mm. This structural design not only allows the seed metering wheel 2 to rotate flexibly without obstruction, but also prevents seeds from getting stuck between the seed metering device housing 1 and the seed metering wheel 2, ensuring the smooth and stable seed metering process. The diameter of the bottom end of the seed guide tube 6 is 35mm, and the size of the arc-shaped limiting plate 7 matches the diameter of the bottom end of the seed guide tube 6. The seed metering port 3 is rectangular in shape, measuring 20mm*40mm.

[0052] In this invention, seed metering wheels 2 of different specifications and models can be made according to the diameter of the seeds and the sowing method. Therefore, the seed metering wheel 2 includes, but is not limited to, corn seed metering wheels, buckwheat seed metering wheels, oat seed metering wheels, sorghum seed metering wheels, and millet seed metering wheels.

[0053] As attached Figure 3 Appendix Figure 4 As shown, the seeding holes 5 on the corn seeding wheel are arranged in a row of ten, and the diameter of the seeding holes 5 on each corn seeding wheel is 15mm.

[0054] As attached Figure 5 Appendix Figure 6 As shown, the seeding holes 5 on the buckwheat seeding wheel are arranged in two rows along the axial direction, with ten holes in each row. The distance between the two rows of seeding holes 5 is 30 mm, and the diameter of the seeding holes 5 on each buckwheat seeding wheel is 8 mm.

[0055] As attached Figure 7 Appendix Figure 8 Appendix Figure 9 As shown, the seeding holes 5 on the oat seeding wheel are arranged in a row, with sixteen holes in each row. Each seeding hole 5 on the oat seeding wheel is a long hole measuring 6mm x 30mm.

[0056] As attached Figure 10 Appendix Figure 11 As shown, the seeding holes 5 on the sorghum seeding wheel are arranged in a row of ten, and the diameter of the seeding holes 5 on each sorghum seeding wheel is 6mm.

[0057] As attached Figure 12 Appendix Figure 13 As shown, the seeding holes 5 on the millet seeding wheel are arranged in a row of ten, and the diameter of the seeding holes 5 on each millet seeding wheel is 3.5 mm.

[0058] In this invention, seed reels 2 of different specifications and models can be made according to the diameter of the seeds and the sowing method. The sowing methods include hill sowing, row sowing, and wide-width uniform sowing.

[0059] As attached Figure 14 As shown, when using hill sowing, the distance between two adjacent seed holes 5 on the seed metering wheel 2 is greater than the width of the seed metering opening 3. Therefore, when using hill sowing, the number of seed metering wheels 2 can be set to ten per row, the width of the seed metering opening 3 is 40mm, and the distance between two adjacent seed holes 5 is 45mm. Hill sowing is divided into single-row hill sowing and double-row hill sowing. When using a single row of seed metering wheels 2, single-row hill sowing can be achieved. When using a double row of seed metering wheels 2, double-row hill sowing on large ridges can be achieved.

[0060] As attached Figure 15 As shown, when using row sowing, the distance between two adjacent seeding holes 5 on the seed metering wheel 2 is less than the width of the seeding opening 3. Therefore, when using row sowing, the number of seed metering wheels 2 can be set to sixteen per row, the width of the seeding opening 3 is 40mm, and the distance between two adjacent seeding holes 5 is 28.5mm, which can realize single-row row sowing. When the seeding hole 5 is a long strip structure, it can realize strip wide uniform sowing of crops such as wheat and oats.

[0061] By replacing the seed metering holes 5 with seed metering wheels 2 of different sizes, the sowing requirements of crops such as corn, buckwheat, oats, sorghum, and millet can be met. Changes in the number and shape of the seed metering holes 5 can also realize sowing modes such as single-row hole sowing, single-row strip sowing, double-row hole sowing, and wide-width uniform sowing, enabling one device to achieve two rows and multiple uses.

[0062] In the specific implementation process, the inner diameter of the seed metering wheel 2 is 130mm and the outer diameter is 146mm; the outer diameter of the seed metering device housing 1 is 156mm; the distance between the right end of the seed metering wheel 2 and the inner bottom wall of the seed metering device housing 1 is 1mm; and the seed metering cylinder 4 is rectangular in shape with dimensions of 20mm*40mm.

[0063] In the description of this invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description, and is 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 invention.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multifunctional inner-side seed metering device, characterized in that: The device includes a seed metering housing (1) fixedly installed on a seeder and open on the left side. A seed metering wheel (2) with its right end open is rotatably installed in the inner cavity of the seed metering housing (1). A seed metering port (3) is opened on the lower part of the side wall of the seed metering housing (1). A seed metering cylinder (4) matching the seed metering port (3) is fixed on the outer side wall of the seed metering housing (1). Several seed metering holes (5) are evenly distributed in the circumferential direction on the side wall of the seed metering wheel (2). Each seed metering hole (5) matches the seed metering port (3) during the rotation of the seed metering wheel (2). A seed guide tube (6) communicating with the lower part of the right side wall of the seed metering housing (1) is installed. The opening of the seed guide tube (6) faces upward. An arc-shaped limiting plate (7) is fixed in the inner cavity of the seed metering housing (1). A flexible seed scraping tongue (8) is installed at one end of the arc-shaped limiting plate (7). The bottom end of the flexible seed scraping tongue (8) rolls in contact with the inner side wall of the seed metering wheel (2). The arc-shaped limiting plate (7) divides the inner cavity of the seed metering wheel (2) into an empty area at the top and a filling area at the bottom. The area of ​​the seed metering port (3) is the seed metering area, and the area between the filling area and the seed metering area is the seed protection area. The seeds enter the filling area through the seed guide tube (6), enter the seed metering hole (5) under the action of gravity, and pass through the seed protection area as the seed metering wheel (2) rotates. When the seed metering hole (5) coincides with the seed metering port (3), the seeds enter the seed metering area and are discharged through the seed metering port (3) under the action of gravity and centrifugal force. The angle between the filling area and the center of the seed metering wheel (2) is 32°, the angle between the seed protection area and the center of the seed metering wheel (2) is 14°, and the angle between the seed metering area and the center of the seed metering wheel (2) is 21°.

2. The multifunctional inner-side filling seed metering device according to claim 1, characterized in that: The inner cavity of the seed metering device housing (1) is integrally fixed with an installation ring (9). A transmission sprocket (10) is fixedly installed on the left end of the seed metering wheel (2). A seed metering shaft (11) passing through the installation ring (9) is fixed in the middle of the right end of the transmission sprocket (10). A bearing (12) is installed between the seed metering shaft (11) and the installation ring (9). The inner ring of the bearing (12) is fixedly connected to the seed metering shaft (11), and the outer ring is fixedly connected to the installation ring (9). The transmission sprocket (10) is connected to the walking drive device on the seeder.

3. The multifunctional inner-side filling seed metering device according to claim 2, characterized in that: The seed metering device housing (1) and seed metering wheel (2) are both cylindrical structures; the seed metering device housing (1) and the frame of the seeder, and the seed metering device housing (1) and the arc-shaped limiting plate (7) are all fixedly connected by bolts; the bearing (12) is a ball bearing.

4. A multifunctional inner-side filling seed metering device according to claim 3, characterized in that: The distance between the inner wall of the seed metering device housing (1) and the outer wall of the seed metering wheel (2) is 0.15mm~0.25mm; the diameter of the bottom end of the seed guide tube (6) is 35mm, and the size of the arc-shaped limiting plate (7) matches the diameter of the bottom end of the seed guide tube (6); the seed metering port (3) is rectangular in shape with a diameter of 20mm*40mm.

5. A multifunctional inner-side filling seed metering device according to claim 1, characterized in that: The seeding reel (2) includes, but is not limited to, corn seeding reels, buckwheat seeding reels, oat seeding reels, sorghum seeding reels, and millet seeding reels; the seeding holes (5) on the corn seeding reel are in one row, with ten holes in each row, and the diameter of the seeding holes (5) on each corn seeding reel is 15mm; the seeding holes (5) on the buckwheat seeding reel are in two rows distributed along the left and right sides, with ten holes in each row, and the distance between the two rows of seeding holes (5) is 30mm, and the diameter of the seeding holes (5) on each buckwheat seeding reel is... The diameter is 8mm; the number of seed holes (5) on the oat seeding wheel is one row, with sixteen holes in each row, and each seed hole (5) on the oat seeding wheel is a long hole of 6mm*30mm; the number of seed holes (5) on the sorghum seeding wheel is one row, with ten holes in each row, and the diameter of each seed hole (5) on the sorghum seeding wheel is 6mm; the number of seed holes (5) on the millet seeding wheel is one row, with ten holes in each row, and the diameter of each seed hole (5) on the millet seeding wheel is 3.5mm.

6. A multifunctional inner-side filling seed metering device according to claim 5, characterized in that: Seeding wheels (2) and seed metering device housings (1) of different specifications and models can be made according to the diameter of the seeds and the sowing method. The sowing methods include hill sowing, strip sowing, and wide-width uniform sowing. When hill sowing is used, the distance between two adjacent seed holes (5) on the seed metering wheel (2) is greater than the width of the seed outlet (3). Hill sowing is divided into single-row hill sowing and double-row hill sowing on a large ridge. When using a single-row seed metering wheel (2), single-row hill sowing can be achieved. When using a double-row seed metering wheel (2), double-row hill sowing on a large ridge can be achieved. When using strip sowing, the distance between two adjacent seed holes (5) on the seed metering wheel (2) is less than the width of the seed outlet (3). Single-row strip sowing can be achieved. When the seed hole (5) is a long strip structure, wide-width uniform sowing in a strip shape can be achieved.

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