Multifunctional seeding machine suitable for farmland and working method thereof

Abstract

The invention relates to a multifunctional seeder suitable for farmland and a working method thereof.The multifunctional seeder comprises mounting racks, an adjusting cross beam and seeding mechanisms, the mounting racks are mounted at the two ends of the adjusting cross beam respectively, the mounting racks are connected with a tractor, and the multiple seeding mechanisms are mounted on the adjusting cross beam at equal intervals; the seeding mechanism comprises a sliding frame arranged on the adjusting cross beam in a sleeving mode, side blocking frames are symmetrically installed on the bottom side of the sliding frame, a rotating cylinder is installed between the two side blocking frames through a bearing, and a plurality of first seed suction hole sets are formed in the two sides of the rotating cylinder at equal intervals; each first seed suction hole group comprises a first large seed suction hole, a first middle seed suction hole and a first small seed suction hole which are arranged at equal intervals; through three innovations of graded suction hole dynamic matching, pneumatic-electric cooperative reseeding and modular line spacing adjustment, the problems that an existing seeding machine is poor in adaptability, low in precision, insufficient in efficiency and the like are solved, and the seeder is particularly suitable for a large-scale farm multi-crop rotation scene.

Description

Technical Field

[0001] The present invention relates to the technical field of farmland planting, and particularly relates to a multifunctional seeder suitable for farmland and its working method. Background Art

[0002] During the farmland planting process, the rapid seeding work is completed by a multifunctional seeder. The multifunctional seeder is a modern seeding device integrating multiple agricultural functions, aiming to improve seeding efficiency, adapt to the needs of different crops, and optimize resource utilization.

[0003] During the seeding process, the sizes of different crop seeds are different. A single seed suction hole cannot adapt to multiple crop seeds. Moreover, during the seeding process, once a seed is not adsorbed on the seed suction hole, there will be a situation of missed seeding during seeding. The detection of missed seeding depends on later manual inspection, and the delayed reseeding leads to uneven emergence. Summary of the Invention

[0004] The problem solved by the present invention is to provide a multifunctional seeder suitable for farmland and its working method, which solves the technical problems that during the seeding process, the sizes of different crop seeds are different, a single seed suction hole cannot adapt to multiple crop seeds, and during the seeding process, once a seed is not adsorbed on the seed suction hole, there will be a situation of missed seeding during seeding. The detection of missed seeding depends on later manual inspection, and the delayed reseeding leads to uneven emergence.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A multifunctional seeder suitable for farmland includes a mounting frame, an adjusting cross beam, and a seeding mechanism. The two ends of the adjusting cross beam are respectively installed with mounting frames, and the mounting frames are connected to a tractor. A number of seeding mechanisms are equidistantly installed on the adjusting cross beam. The seeding mechanism includes a sliding frame sleeved on the adjusting cross beam. Side blocking frames are symmetrically installed on the bottom side of the sliding frame. A rotating cylinder is installed between the two side blocking frames through bearings. A number of groups of first seed suction hole groups are equidistantly opened on both sides of the rotating cylinder. Each group of the first seed suction hole groups includes a first large seed suction hole, a first medium seed suction hole, and a first small seed suction hole arranged at equal intervals. An adjusting component for separately conducting the first large seed suction hole, the first medium seed suction hole, and the first small seed suction hole is installed inside the rotating cylinder. A rotary joint is installed at the center of one side of the rotating cylinder, and the rotary joint is connected to a pneumatic tube. A seed collecting hopper is installed on the bottom side of the side blocking frame. The bottom end of the seed collecting hopper is connected to a seeding tube. A seed scraping inclined plate is arranged on the bottom side of the inner wall of the side blocking frame.

[0007] Preferably, a bolt is threadedly installed on the outer side of the sliding frame, and the inner end of the bolt contacts the adjusting cross beam.

[0008] Preferably, a material cylinder is installed on the side baffle, a main seed bin and a secondary seed bin are arranged in the material cylinder, and an air flow sensor is installed on the main seed bin.

[0009] Preferably, a rotating shaft is rotatably installed in the carriage, a rotating gear is installed on the rotating shaft, external teeth are arranged on the outer side of the rotating cylinder, and the external teeth are meshed with the rotating gear.

[0010] Preferably, the rotating shaft is connected to a polygonal shaft, the polygonal shafts at the ends of adjacent rotating shafts are slidably connected to the ends of the shaft sleeves, a first motor is installed on one of the side baffles, and the first motor is connected to one of the rotating shafts.

[0011] Preferably, the adjusting assembly includes adjusting turntables rotatably installed on both sides inside the rotating cylinder, and the two adjusting turntables are connected by a connecting shaft. A plurality of groups of second seed suction hole groups are equidistantly arranged on the adjusting turntable. The second seed suction hole group includes a second large seed suction hole, a second medium seed suction hole and a second small seed suction hole.

[0012] Preferably, a second motor is installed in the middle of the other side of the rotating cylinder, and the output end of the second motor is connected to the adjusting turntable.

[0013] Preferably, the distance between adjacent first large seed suction holes and first medium seed suction holes is greater than the total distance of each group of second seed suction hole groups;

[0014] The diameters of the first large seed suction hole and the second large seed suction hole are 4.5 - 5.5 mm, the diameters of the first medium seed suction hole and the second medium seed suction hole are 3.0 - 3.5 mm, and the diameters of the first small seed suction hole and the second small seed suction hole are 1.5 - 2.0 mm.

[0015] Preferably, a plurality of lifting arms are equidistantly installed inside one of the adjusting turntables, electric push rods are installed on the lifting arms, the telescopic ends of the electric push rods penetrate through the lifting arms and are connected to the adjusting turntable, and sealing plates are installed on the lifting arms.

[0016] A working method of a multifunctional seeder applicable to farmland, and the specific operation steps of the working method are as follows:

[0017] Step 1: Loosen the bolts, adjust the spacing between the sowing mechanisms on the adjusting crossbeam respectively, then tighten the bolts, connect the air pressure pipe with the negative pressure chamber, add seeds to the main seed bin and the auxiliary seed bin respectively. Drive the adjusting turntable to rotate through the operation of the second motor, and then adjust the second seed suction hole group to correspond to the first seed suction hole group. When the second large seed suction hole corresponds to the first seed suction hole group, at this time, the first seed suction hole group is communicated with the inside of the rotating cylinder, and the second medium seed suction hole and the second small seed suction hole of the first seed suction hole group are in a closed state. Similarly, by rotating the adjusting turntable, the communication of the second medium seed suction hole and the second small seed suction hole is realized respectively. According to the size of the seeds, different seed suction holes are used for adsorbing and sowing. Drive the lifting arm and the sealing plate to move and contact the adjusting turntable through the electric push rod, so as to close the first seed suction hole group and the second seed suction hole group of the seeds in the adsorption side baffle frame;

[0018] Step 2: Through the operation of the first motor, the rotation of the rotating shaft is realized by the transmission of the shaft sleeve and the multi-sided shaft. At this time, the rotating gear teeth cooperate with the meshing external teeth to drive the rotating cylinder to rotate. When the rotating cylinder rotates from the bottom of the material cylinder to the top of the material cylinder, at this time, the seed suction holes that are in conduction with the inside of the rotating cylinder adsorb seeds under the action of negative pressure. When the rotating cylinder continues to rotate, the air flow sensor senses the change of the air pressure at the seed suction hole, and judges whether the seed suction hole passing through the main seed bin adsorbs seeds. When the seed suction hole does not adsorb seeds, at this time, open the seed suction hole at the same height on the other side of the material cylinder passing through the auxiliary seed bin, drive the lifting arm and the sealing plate to move through the electric push rod, and open the seed suction hole. At this time, the seed suction hole adsorbs seeds from the auxiliary seed bin;

[0019] Step 3: When the rotating cylinder rotates, the seeds pass through the seed scraping inclined plate in turn. At this time, the seed scraping inclined plate scrapes the seeds and drops them into the seed collecting hopper, and sows them to the ground through the sowing pipe.

[0020] The beneficial effects of the present invention are: it has a multi-stage suction hole dynamic switching function. By rotating the adjusting turntable, the first large seed suction hole, the first medium seed suction hole and the first small seed suction hole with different diameters in the first seed suction hole group on the rotating cylinder are respectively communicated with the rotating cylinder, realizing the rapid switching and adjustment of the diameter of the seed suction hole, and the hierarchical aperture matches the seed size, optimizing the air flow field;

[0021] The main seed bin and the auxiliary seed bin store seeds separately. The adsorption state is monitored in real time through the air flow sensor. When not adsorbed, the seed suction hole at the same position of the auxiliary seed bin is automatically opened. The opening and closing of the sealing plate are controlled by the electric push rod. Through the double seed suction holes arranged on both sides of the rotating cylinder, automatic reseeding is realized;

[0022] Through three major innovations of hierarchical suction hole dynamic matching, gas-electricity collaborative reseeding and modular row spacing adjustment, the pain points of poor adaptability, low precision and insufficient efficiency of existing seeders are solved, and it is especially suitable for the multi-crop rotation scenario of large-scale farms. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the overall structure of the present invention;

[0024] Figure 2 First schematic diagram of the seeding mechanism of the present invention;

[0025] Figure 3 Second schematic diagram of the seeding mechanism of the present invention;

[0026] Figure 4 First sectional view of the seeding mechanism of the present invention;

[0027] Figure 5 First internal structure schematic diagram of the seeding mechanism of the present invention;

[0028] Figure 6 Second internal structure schematic diagram of the seeding mechanism of the present invention;

[0029] Figure 7 Second sectional view of the seeding mechanism of the present invention.

[0030] Legend:

[0031] 1. Mounting frame; 2. Adjusting cross beam; 3. Seeding mechanism; 4. Slide carriage; 5. Bolt; 6. Side retaining frame; 7. Bearing; 8. Rotating cylinder; 9. Material cylinder; 10. Main seed bin; 11. Auxiliary seed bin; 12. Airflow sensor; 13. First seed suction hole group; 14. First large seed suction hole; 15. First medium seed suction hole; 16. First small seed suction hole; 17. Adjusting turntable; 18. Connecting shaft; 19. Second seed suction hole group; 20. Second large seed suction hole; 21. Second medium seed suction hole; 22. Second small seed suction hole; 23. Lifting arm; 24. Electric push rod; 25. Sealing plate; 26. Rotating shaft; 27. Rotating gear; 28. Polygonal shaft; 29. Bush; 30. First motor; 31. External teeth; 32. Rotary joint; 33. Pneumatic tube; 34. Second motor; 35. Seed collecting hopper; 36. Seeding tube; 37. Seed scraping inclined plate. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0033] The following gives specific embodiments.

[0034] Refer to Figures 1 to 7, A multi-functional seeder suitable for farmland, comprising a mounting frame 1, an adjusting crossbeam 2 and a seeding mechanism 3. The two ends of the adjusting crossbeam 2 are respectively installed with the mounting frame 1, and the mounting frame 1 is connected to a tractor. A number of seeding mechanisms 3 are installed at equal intervals on the adjusting crossbeam 2. A bolt 5 is installed on the outer side of the sliding carriage 4 in a threaded manner, and the inner end of the bolt 5 contacts the adjusting crossbeam 2. Loosen the bolt 5, adjust the spacing between the seeding mechanisms 3 on the adjusting crossbeam 2 respectively, and then tighten the bolt 5 to fix the seeding mechanism 3.

[0035] The seeding mechanism 3 includes a carriage 4 sleeved on the adjusting cross beam 2. Side retaining frames 6 are symmetrically installed on the bottom side of the carriage 4. A rotating cylinder 8 is installed between the two side retaining frames 6 through a bearing 7. A plurality of groups of first seed suction hole groups 13 are equidistantly arranged on both sides of the rotating cylinder 8. Each group of first seed suction hole groups 13 includes a first large seed suction hole 14, a first medium seed suction hole 15, and a first small seed suction hole 16 arranged at equal intervals. An adjusting component for separately conducting the first large seed suction hole 14, the first medium seed suction hole 15, and the first small seed suction hole 16 is installed inside the rotating cylinder 8. A rotary joint 32 is installed at the center of one side of the rotating cylinder 8, and the rotary joint 32 is connected to a pneumatic tube 33. A seed collecting hopper 35 is installed on the bottom side of the side retaining frame 6. The bottom end of the seed collecting hopper 35 is connected to a seeding tube 36. A seed scraping inclined plate 37 is arranged on the bottom side of the inner wall of the side retaining frame 6. A material cylinder 9 is installed on the side retaining frame 6. A main seed bin 10 and a secondary seed bin 11 are arranged inside the material cylinder 9. An air flow sensor 12 is installed on the main seed bin 10. A rotating shaft 26 is rotatably installed inside the carriage 4. A rotating tooth 27 is installed on the rotating shaft 26. External teeth 31 are arranged on the outside of the rotating cylinder 8, and the external teeth 31 are meshed with the rotating tooth 27. The rotating shaft 26 is connected to a polygonal shaft 28. The polygonal shafts 28 at the ends of adjacent rotating shafts 26 are slidably connected to the ends of the shaft sleeves 29. A first motor 30 is installed on one of the side retaining frames 6, and the first motor 30 is connected to one of the rotating shafts 26. The adjusting component includes adjusting turntables 17 rotatably installed on both sides inside the rotating cylinder 8, and the two adjusting turntables 17 are connected through a connecting shaft 18. A plurality of groups of second seed suction hole groups 19 are equidistantly arranged on the adjusting turntables 17. The second seed suction hole groups 19 include a second large seed suction hole 20, a second medium seed suction hole 21, and a second small seed suction hole 22. A second motor 34 is installed in the middle of the other side of the rotating cylinder 8, and the output end of the second motor 34 is connected to the adjusting turntable 17. A plurality of lifting arms 23 are equidistantly installed inside one of the adjusting turntables 17. Electric push rods 24 are installed on the lifting arms 23, and the telescopic ends of the electric push rods 24 penetrate through the lifting arms 23 and are connected to the adjusting turntable 17. Sealing plates 25 are installed on the lifting arms 23, which has the function of dynamically switching multi-level suction holes. By rotating the adjusting turntable 17, the first large seed suction hole 14, the first medium seed suction hole 15, and the first small seed suction hole 16 with different diameters in the first seed suction hole group 13 on the rotating cylinder 8 are respectively conducted with the rotating cylinder 8, realizing the rapid switching and adjustment of the diameter of the seed suction holes, grading the aperture to match the seed size, optimizing the air flow field, storing seeds separately in the main seed bin 10 and the secondary seed bin 11, monitoring the adsorption state in real time through the air flow sensor 12, automatically opening the seed suction holes at the same position of the secondary seed bin 11 when not adsorbed, controlling the opening and closing of the sealing plate 25 through the electric push rod 24, and realizing automatic reseeding through the double seed suction holes arranged on both sides of the rotating cylinder 8. Through three innovations of dynamic matching of graded suction holes, pneumatic and electric collaborative reseeding, and modular row spacing adjustment, it solves the pain points of poor adaptability, low precision, and insufficient efficiency of existing seeders, and is especially suitable for the multi-crop rotation scenario of large-scale farms;

[0036] The distance between the adjacent first large seed suction holes 14 and the first medium seed suction holes 15 is greater than the total distance of each group of second seed suction hole groups 19. The diameters of the first large seed suction holes 14 and the second large seed suction holes 20 are 4.5 - 5.5 mm, which are used for adsorbing and sowing seeds with a diameter of 4 - 6 mm. The diameters of the first medium seed suction holes 15 and the second medium seed suction holes 21 are 3.0 - 3.5 mm, which are used for adsorbing and sowing seeds with a diameter of 3 - 4 mm. The diameters of the first small seed suction holes 16 and the second small seed suction holes 22 are 1.5 - 2.0 mm, which are used for adsorbing and sowing seeds with a diameter of 1 - 2 mm.

[0037] Working principle: Step 1: Loosen the bolt 5, adjust the distance between the sowing mechanisms 3 on the adjusting crossbeam 2 respectively, and then tighten the bolt 5. Connect the air pressure pipe 33 with the negative pressure cavity. Add seeds into the main seed bin 10 and the auxiliary seed bin 11 respectively. Drive the adjusting turntable 17 to rotate through the operation of the second motor 34, and then adjust the second seed suction hole group 19 to correspond to the first seed suction hole group 13. When the second large seed suction holes 20 correspond to the first seed suction hole group 13, at this time, the first seed suction hole group 13 is connected with the inside of the rotating cylinder 8, and the second medium seed suction holes 21 and the second small seed suction holes 22 of the first seed suction hole group 13 are in a closed state. Similarly, by rotating the adjusting turntable 17, the connection of the second medium seed suction holes 21 and the second small seed suction holes 22 is realized respectively. According to the size of the seeds, different seed suction holes are used for adsorbing and sowing. Drive the lifting arm 23 and the sealing plate 25 to move through the electric push rod 24 to contact the adjusting turntable 17, and then close the first seed suction hole group 13 and the second seed suction hole group 19 of the seeds in the adsorption side baffle 6;

[0038] Step 2: Through the operation of the first motor 30, the rotation of the rotating shaft 26 is realized through the transmission of the shaft sleeve 29 and the polygonal shaft 28. At this time, the rotating rotating teeth 27 cooperate with the meshing external teeth 31 to drive the rotating cylinder 8 to rotate. When the rotating cylinder 8 rotates from the bottom of the material cylinder 9 to the top of the material cylinder 9, at this time, the seed suction holes that are in conduction with the inside of the rotating cylinder 8 adsorb the seeds under the action of negative pressure. When the rotating cylinder 8 continues to rotate, the air flow sensor 12 senses the change of the air pressure at the seed suction holes to judge whether the seed suction holes passing through the main seed bin 10 adsorb seeds. When the seed suction holes do not adsorb seeds, at this time, open the seed suction holes at the same height on the other side of the material cylinder 9 passing through the auxiliary seed bin 11, drive the lifting arm 23 and the sealing plate 25 to move through the electric push rod 24, and open the seed suction holes. At this time, the seed suction holes adsorb seeds from the auxiliary seed bin 11;

[0039] Step 3: When the rotating cylinder 8 rotates, the seeds pass through the seed scraping inclined plate 37 in sequence. At this time, the seed scraping inclined plate 37 scrapes the seeds and drops them into the seed collecting hopper 35, and sows them onto the ground through the sowing pipe 36.

[0040] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A multifunctional seeder suitable for farmland, characterized in that: The invention comprises a mounting frame (1), an adjusting crossbeam (2) and a sowing mechanism (3), wherein the mounting frames (1) are respectively mounted at both ends of the adjusting crossbeam (2), and the mounting frames (1) are connected to a tractor, and a plurality of sowing mechanisms (3) are mounted at equal intervals on the adjusting crossbeam (2), and the sowing mechanism (3) comprises a slide frame (4) sleeved on the adjusting crossbeam (2), a side block frame (6) is symmetrically mounted on the bottom side of the slide frame (4), a rotating drum (8) is mounted between two side block frames (6) via bearings (7), and a plurality of groups of first seed suction hole groups (13) are evenly spaced on both sides of the rotating drum (8), and each group of the first seed suction hole groups (13) has a plurality of first seed suction hole groups (13) and a plurality of first seed suction hole groups (13) arranged on the two sides of the rotating drum (8). The invention comprises a first large seed suction hole (14), a first middle seed suction hole (15) and a first small seed suction hole (16) which are arranged at equal intervals. An adjusting component for independently conducting the first large seed suction hole (14), the first middle seed suction hole (15) and the first small seed suction hole (16) is installed inside the rotating drum (8). A rotating joint (32) is installed at the center of one side of the rotating drum (8), and the rotating joint (32) is connected to an air pressure pipe (33). A seed collecting bucket (35) is installed at the bottom side of the side baffle (6), and a sowing pipe (36) is connected to the bottom end of the seed collecting bucket (35). A seed scraping inclined plate (37) is arranged at the bottom side of the inner wall of the side baffle (6).

2. A multifunctional seeder suitable for farmland according to claim 1, characterized in that: The outer side of the slide (4) is threadedly mounted with a bolt (5), and the inner end of the bolt (5) is in contact with the adjusting beam (2).

3. A multifunctional seeder suitable for farmland according to claim 2, characterized in that: A barrel (9) is installed on the side baffle (6), a main seed bin (10) and a secondary seed bin (11) are provided in the barrel (9), and an airflow sensor (12) is installed on the main seed bin (10).

4. A multifunctional seeder suitable for farmland according to claim 3, characterized in that: A rotating shaft (26) is rotatably mounted inside the slide (4), a rotating tooth (27) is mounted on the rotating shaft (26), and an external tooth (31) is arranged on the outside of the rotating cylinder (8), and the external tooth (31) is meshed with the rotating tooth (27).

5. A multifunctional seeder suitable for farmland according to claim 4, characterized in that: The rotating shaft (26) is connected to a polygonal shaft (28), and the polygonal shaft (28) at the end of an adjacent rotating shaft (26) is slidably connected to the end of a shaft sleeve (29), and a first motor (30) is installed on one of the side baffles (6), and the first motor (30) is connected to one of the rotating shafts (26).

6. A multifunctional seeder suitable for farmland according to claim 5, characterized in that: The adjustment assembly comprises an adjustment dial (17) rotatably mounted on both sides of the inside of the rotating drum (8), and the two adjustment dials (17) are connected via a connecting shaft (18), and a plurality of groups of second seed suction holes (19) are evenly spaced on the adjustment dial (17), and the second seed suction hole groups (19) comprise a second large seed suction hole (20), a second medium seed suction hole (21) and a second small seed suction hole (22).

7. A multifunctional seeder suitable for farmland according to claim 6, characterized in that: A second motor (34) is installed in the middle of the other side of the rotating drum (8), and an output end of the second motor (34) is connected to the adjusting rotating disk (17).

8. The multifunctional seeder suitable for farmland according to claim 7, characterized in that: The spacing between adjacent first large seed suction holes (14) and first medium seed suction holes (15) is greater than the total spacing between each group of second seed suction holes (19); The diameters of the first large seed suction hole (14) and the second large seed suction hole (20) are 4.5-5.5 mm, the diameters of the first medium seed suction hole (15) and the second medium seed suction hole (21) are 3.0-3.5 mm, and the diameters of the first small seed suction hole (16) and the second small seed suction hole (22) are 1.5-2.0 mm.

9. A multifunctional seeder suitable for farmland according to claim 8, characterized in that: A plurality of lifting arms (23) are installed at equal intervals on the inner side of one of the adjusting turntables (17); an electric push rod (24) is installed on the lifting arm (23); and a telescopic end of the electric push rod (24) passes through the lifting arm (23) and is connected to the adjusting turntable (17); and a sealing plate (25) is installed on the lifting arm (23).

10. The working method of a multifunctional seeder suitable for farmland according to claim 9, characterized in that: The specific steps of this working method are as follows: Step 1: Loosen the bolts (5), adjust the spacing between the sowing mechanisms (3) on the adjustment beam (2), and then tighten the bolts (5), connect the air pressure tube (33) with the negative pressure chamber, add seeds to the main seed bin (10) and the auxiliary seed bin (11), and drive the adjustment dial (17) to rotate through the second motor (34), thereby adjusting the second seed suction hole group (19) to correspond to the first seed suction hole group (13). When the second large seed suction hole (20) corresponds to the first seed suction hole group (13), the first seed suction hole group (13) is connected to the inside of the rotating drum (8). , while the second middle seed suction hole (21) and the second small seed suction hole (22) of the first seed suction hole group (13) are in a closed state. Similarly, by rotating the adjusting turntable (17), the second middle seed suction hole (21) and the second small seed suction hole (22) are connected respectively. Different seed suction holes are used for adsorption sowing according to the size of the seeds. The electric push rod (24) drives the lifting arm (23) and the sealing plate (25) to move and contact with the adjusting turntable (17), thereby closing the first seed suction hole group (13) and the second seed suction hole group (19) of the seeds in the adsorption side retaining frame (6); Step 2: The first motor (30) works, and the shaft sleeve (29) and the polygonal shaft (28) are driven to rotate the shaft (26). At this time, the rotating gear (27) cooperates with the meshing external gear (31) to drive the rotating drum (8) to rotate. When the rotating drum (8) rotates and moves from the bottom of the barrel (9) to the top of the barrel (9), the seed suction holes that are connected to the rotating drum (8) absorb seeds under the action of negative pressure. When the rotating drum (8) continues to rotate, the air pressure change at the seed suction holes is sensed by the air flow sensor (12) to determine whether the seed suction holes passing through the main seed bin (10) absorb seeds. When the seed suction holes do not absorb seeds, the seed suction holes at the same height on the other side of the barrel (9) passing through the auxiliary seed bin (11) are opened, and the lifting arm (23) and the sealing plate (25) are driven to move by the electric push rod (24) to open the seed suction holes. At this time, the seed suction holes absorb seeds from the auxiliary seed bin (11); Step 3: When the drum (8) rotates, the seeds pass through the scraping inclined plate (37) in sequence. At this time, the scraping inclined plate (37) scrapes the seeds and drops them into the seed collecting bucket (35), and then they are sown on the ground through the sowing tube (36).

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