Combined type seed scraping brush mechanism and air-blowing type seed sowing device

By designing a combined scraping brush mechanism in the air-blowed seed discharger, separating the seed space and seed falling space, and using the brush module to clean the excess seeds in the seed groove, solving the problem of double grains in the seed groove and improving seeds Uniformity and effect, and reduce usage costs.

CN222148219UActive Publication Date: 2024-12-13YONGHAO INTELLIGENT TECH (JIANGSU) CO LTD
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Patent Information

Application Number
CN202420595599.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-26
Publication Date
2024-12-13
Estimated Expiration
2034-03-26

AI Technical Summary

Technical Problem

During the sowing process, existing air-blowed seeds are prone to double or multiple seeds in the seed tank, resulting in uneven distribution of crops and affecting the sowing effect.

Method used

A combined shave brush mechanism is designed, including a first shave brush, a second shave brush and a third shave brush. By separating the scheduling shell into a scheduling space and a seed drop space, the scheduling and scheduling are used. The contact of the seed disk realizes the cleaning and stable seed production of excess seeds in the seed tank, reducing the double-grain rate.

Benefits of technology

Improves the uniformity of seeds, reduces the possibility of seed double grains, improves seed effect, and reduces the cost of use through the removable brush module.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a combined type seed scraping brush mechanism and air-blowing type seed-metering device, the combined type seed scraping brush mechanism comprises a first brush, a second brush and a third brush, the second brush is obliquely arranged in a shell of the seed-metering device and divides the shell on one side of a seed-metering disc into an upper seed-metering space and a lower seed-falling space, and the third brush is arranged in the shell on the other side of the seed-metering disc. The first brush is arranged in the seed metering space, the third brush is arranged in the seed falling space and is connected with the top of the second brush, the first brush, the second brush and the third brush are in contact with the surface of a seed metering disc of the seed metering device, and the shell is connected with a reinforcing assembly for clamping the second brush. The combined brush mechanism is adopted, the functions of cleaning redundant seeds in the seed groove and stably discharging the seeds are achieved at the same time, the seed discharging uniformity is improved, the possibility of double seeds is reduced, the seeding effect is improved, the reinforcing assembly is arranged, the reinforcing plate is attached to the surface of the mounting groove and supports the mounting groove, and deformation of the side wall of the mounting groove is reduced.
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Description

Technical Field

[0001] The utility model relates to the technical field of seeding devices, in particular to a combined seed scraping brush mechanism and an air-blowing seeding device. Background Art

[0002] The seed meter is the core component of the seeder and an important factor in determining the working quality and performance of the seeder. Its function is to guide the seeds in the seed box of the seeder into a uniform seed flow or single seeds to control the sowing amount and achieve uniform sowing. The air-blown seed meter uses an air-actuated power source to perform seed taking and seeding operations when the seed disc rotates. In the actual use of the seed meter, there are often two or more seeds in a seed trough. After sowing, two or more seedlings of crops grow in the same position, resulting in uneven distribution of crops and affecting the growth of crops. In order to ensure the sowing effect, it is necessary to clean up the excess seeds in the seed trough. Therefore, a combined seed scraping brush mechanism and an air-blown seed meter are proposed to solve the problems existing in the prior art. Utility Model Content

[0003] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0004] In order to solve the above problems, the utility model discloses a combined seed scraping brush mechanism and an air-blowing seed metering device; the utility model comprises:

[0005] The first brush, the second brush and the third brush, the second brush is tiltedly arranged in the shell of the seed metering device, dividing the shell on one side of the seeding disk into an upper seeding space and a lower seed dropping space, the first brush is arranged in the seeding space, the third brush is arranged in the seed dropping space and connected to the top of the second brush, the first brush, the second brush and the third brush are all in contact with the surface of the seeding disk of the seed metering device, and a reinforcement component for clamping the second brush is connected to the shell.

[0006] Preferably, the number of the second brushes is set to two, which are respectively set to be a second brush A and a second brush B. The second brush B is obliquely arranged below the second brush A. The top and bottom ends of the second brush A are both connected to the shell. The top end of the second brush B is connected to the third brush, and the bottom end is connected to the shell.

[0007] Preferably, the second brush is mounted on the housing via a second brush fixing frame, and the second brush fixing frame comprises:

[0008] A fixing plate, the fixing plate being closely connected to the side wall of the shell;

[0009] The mounting groove A and the mounting groove B are provided on the fixing plate, and the second brush A and the second brush B are installed in the mounting groove A and the mounting groove B respectively;

[0010] The arc-shaped mounting plate is connected to one side of the fixing plate and close to the edge of the shell. The third brush is connected to the arc-shaped mounting plate, and the top end of the third brush contacts the second brush A and the second brush B.

[0011] Preferably, a brush fixing piece is connected to the shell, the brush fixing piece is connected to the side wall of the shell by bolts, and is crimped to the surface of the fixing plate, and the number of the brush fixing pieces is set to at least three.

[0012] Preferably, a positioning groove is provided on the contact surface between the brush fixing piece and the fixing plate, and a positioning protrusion is connected to the fixing plate. When the brush fixing piece is pressed against the fixing plate, the positioning protrusion is clamped in the positioning groove.

[0013] Preferably, the top ends of the installation grooves A and B are closed, and the reinforcement component is arranged at the upper part between the installation grooves A and B.

[0014] Preferably, the reinforcement assembly comprises:

[0015] A supporting plate, the supporting plate is connected to the fixing plate;

[0016] Reinforcement plates, two reinforcement plates are respectively attached to the outer walls of the installation slot A and the installation slot B, and one end of the reinforcement plate is hinged to the support plate;

[0017] An adjusting plate, the adjusting plate is abutted between the two reinforcing plates, and a sliding groove for the adjusting plate to slide is provided on the side of the reinforcing plate;

[0018] An adjusting bolt, one end of which is rotatably connected to the supporting plate, a rod of the adjusting bolt passes through the supporting plate and is threadedly connected to the adjusting plate, and the other end of the adjusting bolt is connected to a knob.

[0019] Preferably, the first brush is mounted on the housing through a first brush fixing frame, and the first brush fixing frame includes:

[0020] An arc plate, which is mounted on the side wall of the shell and is arranged concentrically with the shell;

[0021] A reinforcing rib, the reinforcing rib is concentrically connected to the arc plate, and a plurality of through holes are provided on the reinforcing rib, and bolts pass through the through holes to connect the arc plate to the shell;

[0022] A brush cylinder, a plurality of brush cylinders are connected to the reinforcing ribs and extend toward the outer wall of the shell body, and a first brush is connected inside the brush cylinder.

[0023] Preferably, the first brush is arranged between the seed inlet and the air inlet of the shell.

[0024] An air-blowing seed meter adopts the combined seed scraping brush mechanism, comprising: a shell and a seeding disk, the seeding disk is rotatably connected to the inner wall of the shell, the combined seed scraping brush mechanism is connected to one side of the shell and contacts the seeding disk, the side wall of the shell is provided with an air inlet and a seed inlet, the bottom end of the shell is provided with a seed drop port, the air inlet and the seed inlet are arranged above the second brush, the seed drop port is arranged below the second brush and is located between the second brush and a third brush.

[0025] The seeding disc is evenly provided with a plurality of seed taking units along the circumferential direction, each seed taking unit is provided with a plurality of seed slots, and the seed slots are penetrated with air holes.

[0026] The shell is divided into two parts, and is formed by connecting two half shells arranged on both sides of the seeding disc, and an observation port is arranged on one half shell.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] The combined seed scraping brush mechanism and the air-blowing seed metering device provided in the present embodiment adopt a combined brush mechanism to divide the interior of the seed metering device into a seeding space and a seed dropping space. When the seeding disc rotates, the functions of cleaning the excess seeds in the seed groove and stably seeding the seeds can be realized at the same time, thereby improving the uniformity of seeding, reducing the possibility of double seeds, and improving the sowing effect. The first brush, the second brush, and the third brush used are all detachably arranged with the shell of the seed metering device and can be replaced separately, thereby reducing the use cost.

[0029] The installation slot is set to be closed at the top, and the second brush is clamped in the installation slot to improve the stability of the second brush. A reinforcement component is set, and the reinforcement plate is attached to the surface of the installation slot to support it and reduce the deformation of the side wall of the installation slot; when the second brush is loose, the adjustment bolt is rotated to drive the adjustment plate to move toward the support plate, so that the two reinforcement plates are expanded outward and pressed against the side wall of the installation slot, reducing the gap between the second brush and the installation slot, and ensuring the installation stability of the second brush.

[0030] The combined seed scraping brush mechanism and air-blowing seed metering device described in the present invention, and other advantages, objectives and features of the present invention will be partially reflected through the following description, and will also be partially understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is a schematic diagram of the structure of the air-blowing seed metering device in the utility model;

[0033] Figure 2 This is a schematic diagram of the internal structure of the seed meter in the utility model;

[0034] Figure 3 It is a structural schematic diagram of the seeding disc in the utility model;

[0035] Figure 4 This is a schematic diagram of the installation structure of the brush mechanism in the utility model;

[0036] Figure 5 It is a schematic diagram of the installation structure of the first brush fixing frame and the first brush in the utility model;

[0037] Figure 6 It is a schematic diagram of the installation structure of the second brush fixing frame and the second brush in the utility model;

[0038] Figure 7 This is a schematic diagram of the structure of the second brush fixing frame in the utility model;

[0039] Figure 8 It is a schematic diagram of the installation structure of the reinforcement component in the utility model.

[0040] In the figure: 1. first brush; 2. second brush; 3. third brush; 4. shell; 5. seeding space; 6. seed drop space; 7. first brush fixing frame; 8. arc plate; 9. reinforcing rib; 10. brush cylinder; 11. seed inlet; 12. air inlet; 13. second brush fixing frame; 14. fixing plate; 15. mounting slot A; 16. mounting slot B; 17. arc-shaped mounting plate; 18. seed drop port; 19. seeding disc; 20. seed slot; 21. air hole; 22. observation port; 23. brush fixing piece; 25. positioning protrusion; 26. second brush A; 27. second brush B; 41. support plate; 42. reinforcement plate; 43. adjustment bolt; 44. adjustment plate. DETAILED DESCRIPTION

[0041] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] Example

[0043] The utility model will be further described below in conjunction with the accompanying drawings.

[0044] like Figure 1-7As shown, the combined scraping brush mechanism provided in this embodiment includes:

[0045] The first brush 1, the second brush 2 and the third brush 3, the second brush 2 is tiltedly arranged in the shell 4 of the seed meter, and the shell 4 on one side of the seed disc 19 is divided into an upper seeding space 5 and a lower seed dropping space 6, the first brush 1 is arranged in the seeding space 5, the third brush 3 is arranged in the seed dropping space 6 and connected to the top of the second brush 2, the first brush 1, the second brush 2 and the third brush 3 are all in contact with the surface of the seed disc 19 of the seed meter.

[0046] The first brush 1 is mounted on the housing 4 through a first brush fixing frame 7. The first brush fixing frame 7 includes:

[0047] The arc plate 8 is mounted on the side wall of the housing 4 and is arranged concentrically with the housing 4;

[0048] A reinforcing rib 9, the reinforcing rib 9 is concentrically connected to the arc plate 8, and a plurality of through holes are provided on the reinforcing rib 9, and bolts pass through the through holes to connect the arc plate 8 to the housing 4;

[0049] A brush tube 10 , wherein a plurality of brush tubes 10 are connected to the reinforcing ribs 9 and extend toward the outer wall of the shell 4 , and the first brush 1 is connected inside the brush tube 10 .

[0050] The first brush 1 is arranged between the seed inlet 11 and the air inlet 12 of the housing 4 .

[0051] The number of the second brushes 2 is set to two, which are respectively set to the second brush A26 and the second brush B27. The second brush B27 is tilted below the second brush A26. The top and bottom ends of the second brush A26 are both connected to the shell 4. The top end of the second brush B27 is connected to the third brush 3, and the bottom end is connected to the shell 4.

[0052] The second brush 2 is mounted on the housing 4 via a second brush fixing frame 13. The second brush fixing frame 13 includes:

[0053] A fixing plate 14, the fixing plate 14 is closely connected to the side wall of the housing 4;

[0054] The mounting groove A15 and the mounting groove B16 are provided on the fixing plate 14, and the second brush A26 and the second brush B27 are installed in the mounting groove A15 and the mounting groove B16 respectively;

[0055] The arc-shaped mounting plate 17 is connected to one side of the fixing plate 14 and close to the edge of the shell 4. The third brush 3 is connected to the arc-shaped mounting plate 17, and the top end of the third brush 3 contacts the second brush A26 and the second brush B27.

[0056] A brush fixing member 23 is connected to the housing 4 . The brush fixing member 23 is connected to the side wall of the housing 4 by bolts and is pressed onto the surface of the fixing plate 14 . The number of the brush fixing members 23 is at least three.

[0057] A positioning groove is formed on the contact surface between the brush fixing piece 23 and the fixing plate 14 , and a positioning protrusion 25 is connected to the fixing plate 14 . When the brush fixing piece 23 is pressed against the fixing plate 14 , the positioning protrusion 25 is clamped in the positioning groove.

[0058] The working principle of the utility model is:

[0059] The combined seed scraping brush mechanism provided in this embodiment is used in an air-blowing seed metering device, and includes three brush modules, namely a first brush 1, a second brush 2 and a third brush 3. The three brush modules can be detachably connected to the housing 4 of the seed metering device and are in contact with the seed plate 19. The second brush 2 divides the seeding disk 19 into a seeding space 5 and a seed dropping space 6. The airflow is concentrated in the seeding space 5, and the seeds can be arranged in the seed groove of the seeding disk 19 under the action of the airflow pressure; the second brush 2 can block the airflow from flowing into the seed dropping space 6. After losing the action of the airflow pressure, the seeds are separated from the seeding disk 19 and discharged from the bottom of the shell 4 of the seeding device for sowing; the first brush 1 is arranged in the seeding space of the seeding device, and when the seeding disk 19 rotates, the first brush 1 is used to scrape off the excess seeds on the seeding disk 19; the third brush 3 is arranged close to the top of the second brush 2, and when the seed groove of the seeding disk 19 rotates into the seed dropping space 6, the seeds are pressed into the seed groove by the third brush 3. When it rotates close to the seed dropping port, the seeds will fall off and be discharged only after being separated from the third brush 3.

[0060] The first brush 1, the second brush 2 and the third brush 3 are all arranged on the brush holder. When the first brush 1 is installed, the brush heads of the multiple first brushes 1 are connected one by one in the brush tube 10, and then the first brush holder 7 is installed on the inner wall of the housing 4 of the seed meter by bolts. The second brush 2 and the third brush 4 are arranged in combination and are both installed on the second brush holder 13, wherein the second brush 2 is provided with two, and the two second brushes 2 are at a preset angle, which can complement each other and better block the airflow; when the second brush 2 and the third brush 4 are installed, the second brush A26 is installed in the installation groove A15, the second brush B27 is installed in the installation groove B16, the third brush 3 is installed on the arc-shaped installation plate 17, and then the fixing plate 14 is fitted on the side wall of the housing 4; then the positioning groove on the brush fixing part 23 is aligned with the positioning protrusion 25 on the fixing plate 14, and the brush fixing part 23 is installed on the housing 4 by bolts, and the brush fixing part 23 presses the fixing plate 14.

[0061] An air-blowing seed metering device adopts the combined seed scraping brush mechanism, comprising: a shell 4 and a seeding disk 19, the seeding disk 19 is rotatably connected to the inner wall of the shell 4, the combined seed scraping brush mechanism is connected to one side of the shell 4 and contacts with the seeding disk 19, the side wall of the shell 4 is provided with an air inlet 12 and a seed inlet 11, the bottom end of the shell 4 is provided with a seed drop port 18, the air inlet 12 and the seed inlet 11 are arranged above the second brush 2, the seed drop port 18 is arranged below the second brush 2, and is located between the second brush 2 and the third brush 3.

[0062] The seeding disc 19 is evenly provided with a plurality of seed taking units along the circumferential direction. A plurality of seed taking slots 20 are provided in each seed taking unit. Air holes 21 are penetrated through the seed slots 20 .

[0063] The shell 4 is divided into two parts, and is formed by connecting two half shells arranged on both sides of the seeding disc 19. An observation port 22 is provided on one half shell.

[0064] The air-blowing seeding device provided in this embodiment adopts the combined seed scraping brush mechanism. The central axis of the seeding disc 19 is connected to the driving device of the seeding machine, the air inlet 12 is connected to the air supply device of the seeding machine, the seed inlet 11 is connected to the seed box through a pipeline, and the seed drop port 18 is connected to the seed guide pipe. When the seeding device is in use, the seeding disc 19 rotates to pass through the seed pool formed at the seed inlet 11 to take seeds, and the air flows into the seeding space 5 and blows toward the seeding disc 19. The airflow flows through the air hole 21 to the shell 4 on the other side of the seeding disc 19, so that the seeds are firmly adsorbed on the seed groove 20 under the action of wind force. , the seeds are evenly arranged in the seed slot 20; as the seed plate 19 rotates, when passing through the first brush 1, the brush head of the first brush 1 contacts the seeds in the seed slot 20, and the excess seeds in the seed slot 20 are swept off, preventing the phenomenon of more than 20 corn seeds in one seed slot, thereby improving the uniformity of seeding and reducing the double-grain rate; when passing through the second brush 2, the air pressure suddenly decreases, the seeds in the seed slot 20 contact the third brush 3, and are squeezed in the seed slot 20, keeping the seeding method unchanged; when rotating close to the seed drop port, the seeds are separated from the third brush 3, and the seeds fall off and are discharged.

[0065] An observation port 22 is provided on the half shell on one side to facilitate users and maintenance personnel to observe the internal status of the seed metering device.

[0066] The beneficial effects of the utility model are:

[0067] The combined seed scraping brush mechanism and air-blowing seed meter provided in the present embodiment adopt a combined brush mechanism to divide the interior of the seed meter into a seeding space 5 and a seed dropping space 6. When the seeding disc 19 rotates, it can simultaneously realize the functions of cleaning the excess seeds in the seed groove and stably seeding the seeds, thereby improving the uniformity of seeding, reducing the possibility of double seeds, and improving the sowing effect. The first brush 1, the second brush 2 and the third brush 3 used are all detachably arranged with the shell 4 of the seed meter and can be replaced separately, thereby reducing the cost of use.

[0068] like Figure 8 As shown, in one embodiment, the top ends of the mounting groove A15 and the mounting groove B16 are closed, and the reinforcement component is arranged at the upper part between the mounting groove A15 and the mounting groove B16.

[0069] The reinforcement components include:

[0070] A support plate 41, the support plate 41 is connected to the fixing plate 14;

[0071] Reinforcement plates 42, two reinforcement plates 42 are respectively attached to the outer walls of the mounting groove A15 and the mounting groove B16, and one end of the reinforcement plate 42 is hinged to the support plate 41;

[0072] An adjusting plate 44, the adjusting plate 44 is abutted between the two reinforcing plates 42, and a sliding groove for the adjusting plate 44 to slide is provided on the side of the reinforcing plate 42;

[0073] The adjusting bolt 43 has one end rotatably connected to the supporting plate 41 , a rod of the adjusting bolt 43 passes through the supporting plate 41 and is threadedly connected to the adjusting plate 44 , and the other end of the adjusting bolt 43 is connected to a knob.

[0074] The working principle and beneficial effects of the above technical solution are:

[0075] The mounting groove is set to a top-closed form, and the second brush 2 is clamped in the mounting groove to improve the stability of the second brush 2. The second brush 2 is in contact with the seeding disc 19 and has a large friction force. When the seeding disc 19 rotates, it will generate a force on the second brush 2, causing it to loosen from the mounting groove. Therefore, a reinforcement component is set, and the reinforcement plate 42 is attached to the surface of the mounting groove to support it and reduce the deformation of the side wall of the mounting groove; when the second brush 2 is loose, the rotating adjustment bolt 43 drives the adjustment plate 44 to move toward the support plate 41, so that the two reinforcement plates 42 are expanded outward, pressing the side wall of the mounting groove, reducing the gap between the second brush 2 and the mounting groove, and further clamping the second brush 2 to ensure the installation stability of the second brush 2. A sliding groove for the adjustment plate 44 to slide is set on the side of the reinforcement plate 42, which guides the adjustment plate 44.

[0076] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0077] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. Combined scraping brush mechanism, It is characterized in that include: A first brush (1), a second brush (2) and a third brush (3), wherein the second brush (2) is arranged obliquely in a shell (4) of a seeding device, and the shell (4) on one side of a seeding disk (19) is divided into an upper seeding space (5) and a lower seeding space (6), wherein the first brush (1) is arranged in the seeding space (5), and the third brush (3) is arranged in the seeding space (6) and connected to the top of the second brush (2), wherein the first brush (1), the second brush (2) and the third brush (3) are all in contact with the surface of the seeding disk (19) of the seeding device, and a reinforcing component for clamping the second brush (2) is connected to the shell (4).

2. The combined seed scraping brush mechanism according to claim 1, It is characterized in that The number of the second brushes (2) is set to two, which are respectively set to be a second brush A (26) and a second brush B (27). The second brush B (27) is arranged obliquely below the second brush A (26). The top and bottom ends of the second brush A (26) are both connected to the shell (4). The top end of the second brush B (27) is connected to the third brush (3), and the bottom end is connected to the shell (4).

3. The combined seed scraping brush mechanism according to claim 2, It is characterized in that The second brush (2) is mounted on the housing (4) via a second brush fixing frame (13), and the second brush fixing frame (13) comprises: A fixing plate (14), the fixing plate (14) being closely connected to a side wall of the housing (4); A mounting groove A (15) and a mounting groove B (16), wherein the mounting groove A (15) and the mounting groove B (16) are provided on the fixing plate (14), and the second brush A (26) and the second brush B (27) are respectively installed in the mounting groove A (15) and the mounting groove B (16); The arc-shaped mounting plate (17) is connected to one side of the fixing plate (14) and close to the edge of the housing (4); the third brush (3) is connected to the arc-shaped mounting plate (17), and the top end of the third brush (3) is in contact with the second brush A (26) and the second brush B (27).

4. The combined seed scraping brush mechanism according to claim 3, It is characterized in that The top ends of the installation groove A (15) and the installation groove B (16) are closed, and the reinforcement component is arranged at the upper part between the installation groove A (15) and the installation groove B (16).

5. The combined seed scraping brush mechanism according to claim 4, It is characterized in that The reinforcement components include: A support plate (41), the support plate (41) is connected to the fixing plate (14); Reinforcement plates (42), two reinforcement plates (42) are respectively attached to the outer walls of the installation groove A (15) and the installation groove B (16), and one end of the reinforcement plate (42) is hinged to the support plate (41); An adjusting plate (44), the adjusting plate (44) abuts between the two reinforcing plates (42), and a sliding groove for the adjusting plate (44) to slide is provided on the side of the reinforcing plate (42); An adjusting bolt (43), one end of which is rotatably connected to the support plate (41), a rod of the adjusting bolt (43) passes through the support plate (41) and is threadedly connected to the adjusting plate (44), and the other end of the adjusting bolt (43) is connected to a knob.

6. The combined seed scraping brush mechanism according to claim 1, It is characterized in that The first brush (1) is mounted on the housing (4) via a first brush fixing frame (7), and the first brush fixing frame (7) comprises: An arc-shaped plate (8), the arc-shaped plate (8) is mounted on the side wall of the housing (4) and is arranged concentrically with the housing (4); A reinforcing rib (9), the reinforcing rib (9) is concentrically connected to the arc-shaped plate (8), and a plurality of through holes are provided on the reinforcing rib (9), and bolts pass through the through holes to connect the arc-shaped plate (8) to the housing (4); A brush tube (10), wherein a plurality of brush tubes (10) are connected to the reinforcing rib (9) and extend toward the outer wall of the housing (4); and a first brush (1) is connected inside the brush tube (10).

7. The combined seed scraping brush mechanism according to claim 6, It is characterized in that The first brush (1) is arranged between the seed inlet (11) and the air inlet (12) of the housing (4).

8. An air-blowing seed metering device, using the combined seed scraping brush mechanism according to any one of claims 1 to 7, It is characterized in that include: A shell (4) and a seeding disk (19), wherein the seeding disk (19) is rotatably connected to the inner wall of the shell (4), a combined seed scraping brush mechanism is connected to one side of the shell (4) and contacts the seeding disk (19), an air inlet (12) and a seed inlet (11) are provided on the side wall of the shell (4), a seed drop port (18) is provided at the bottom end of the shell (4), the air inlet (12) and the seed inlet (11) are arranged above the second brush (2), and the seed drop port (18) is arranged below the second brush (2) and between the second brush (2) and the third brush (3).

9. The air-blowing seed metering device according to claim 8, It is characterized in that The seeding disc (19) is evenly provided with a plurality of seed taking units along the circumferential direction, each seed taking unit is provided with a plurality of seed slots (20), and the seed slots (20) are penetrated with air holes (21).

10. The air-blowing seed metering device according to claim 9, It is characterized in that The shell (4) is divided into two parts, and is formed by connecting two half shells arranged on both sides of the seeding disc (19). An observation port (22) is provided on one half shell.