Double-airflow electrically-driven small-particle-size seed precise seeding device

Abstract

Belonging to the field of agricultural machinery, the invention discloses a double-airflow electrically-driven small particle size seed precision seeding device, which comprises a seed supply mechanism, a pressure stabilization seed suction mechanism, a seed cleaning mechanism, a seed throwing mechanism and a driving mechanism. According to the seed supply mechanism, the seed box structure is optimally designed, and the reciprocating type auxiliary seed stirring assembly is additionally arranged to drive seeds to move in the seed box in order, so that stable and ordered seed supply is realized; the pressure-stabilizing seed suction mechanism forms a conical opening with a small outer side and a large inner side by designing the inverted conical seed suction holes, so that the suction force is increased when airflow passes through, the seeds can be better adsorbed, and the seed suction holes are prevented from being blocked; meanwhile, the stability of air flow entering the seed suction shaft from the seed suction holes is improved through the pressure-stabilizing air inlet shaft, and the consistency of negative pressure distribution of the seed suction holes in the seed suction barrel is improved; the seed feeding mechanism achieves efficient seed feeding in an air closing-blowing mode, the adsorption force of a seed suction opening to the center is weakened through an air closing block, meanwhile, seeds efficiently and rapidly fall off from the interior of a seed suction barrel through high-pressure airflow, and the consistency of the seed feeding distance is achieved.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery, and in particular to a dual-airflow electrically driven precision seed metering device for small-diameter seeds. Background Technology

[0002] Precision sowing of small-diameter seeds (such as peppers, tomatoes, rapeseed, and cabbage) is a key step in achieving mechanized vegetable production, but their unique physical characteristics present multiple challenges to seed metering. Small-diameter seeds generally have characteristics such as a large coefficient of variation in seed size (usually exceeding 15%), light weight (1,000-seed weight only 1.5-4.5g), and irregular shape (low sphericity), resulting in poor seed mobility during the sowing process, easy bridging, and seriously affecting the stability of seed supply.

[0003] Currently, air suction seed metering is mostly used for small-diameter seeds, where the seeds need to overcome gravity to be adsorbed onto the seed metering disc. Due to the light weight of the seeds, the critical adsorption negative pressure is difficult to control precisely: insufficient negative pressure leads to seed suction failure (missed sowing); excessive negative pressure easily causes clogging of the orifices, which is difficult to clear once clogged. Air suction seed metering devices rely on the disappearance of negative pressure to achieve seed dispensing, but small seeds, due to their small mass and weak inertia, are easily affected by airflow disturbances, resulting in poor seed spacing consistency.

[0004] The patent application number CN202310997250.6 discloses "a kind of air suction type small seed anti-clogging hole seed meter". The patent proposes a solution that integrates high pressure water gun spray and positive pressure air blowing technology. However, the device has a complex structure and high energy consumption (25% more power consumption than the traditional air suction type). In addition, the water gun is prone to cause seed clumping in the environment with humidity >80%.

[0005] Patent application CN201310488122.5 discloses a "precision seed metering device using an air-suction roller type suitable for small seeds of various shapes," which employs a cross-layout of axial seed suction grooves and radial seed flow grooves, with seed suction air holes set at the intersection points. It utilizes a dual seed scraping line system: the upper scraping line is located at the top of the seed pile to remove excess seeds; the lower scraping line is located in the middle of the seed pile to promote secondary seed filling. However, this design has a complex seed suction disc structure and relies on the weight of the seeds for seed delivery, which can easily lead to inconsistent seed delivery distances. Summary of the Invention

[0006] The purpose of this invention is to provide a dual-airflow electric-driven precision seed metering device for small-diameter seeds, which solves the problems of poor seed supply stability, easy clogging of orifices, and poor seeding consistency in the air-suction seed metering method for small-diameter seeds.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] The present invention discloses a dual-airflow electrically driven precision seed metering device for small-diameter seeds, comprising a seed supply mechanism, a pressure-stabilizing seed suction mechanism disposed at the rear of the seed supply mechanism, a seed cleaning mechanism disposed above the pressure-stabilizing seed suction mechanism, a seed feeding mechanism disposed below the pressure-stabilizing seed suction mechanism, and a driving mechanism for driving the seed supply mechanism and the pressure-stabilizing seed suction mechanism to work.

[0009] Furthermore, the seed supply mechanism includes a seed box, and a left seed box support and a right seed box support are respectively provided on the left and right sides of the seed box. The left seed box support and the right seed box support are mounted on the pressure stabilizing seed suction mechanism, and an auxiliary seed stirring component is provided inside the seed box.

[0010] Furthermore, the auxiliary seed stirring component includes a lead screw disposed above the seed box, the lead screw having a bidirectional thread, a lead screw slider being threadedly connected to the lead screw, a guide bar disposed above the lead screw, a guide bar slider disposed on the guide bar, a seed stirring fixing seat disposed on one side of the lead screw slider and the guide bar slider, and a seed stirring rod disposed below the seed stirring fixing seat.

[0011] Furthermore, the pressure-stabilizing seed suction mechanism includes a left vertical plate and a right vertical plate, and a seed suction assembly is rotatably disposed between the left and right vertical plates. The seed suction assembly includes a seed suction barrel, and a left barrel end cap and a right barrel end cap are respectively disposed on the left and right sides of the seed suction barrel. The left barrel end cap and the right barrel end cap are respectively rotatably disposed on the left vertical plate and the right vertical plate. A seed suction chamber is formed between the seed suction barrel, the left barrel end cap and the right barrel end cap. A pressure-stabilizing air intake shaft is disposed inside the seed suction chamber, and a seed suction shaft is disposed on the right side of the pressure-stabilizing air intake shaft.

[0012] Furthermore, the seed suction bucket is configured as a thin-walled circular structure, and the main body of the seed suction bucket is provided with a single row or multiple rows of seed suction holes according to the seed dispensing requirements.

[0013] Furthermore, the seed suction hole is configured as an inverted conical structure, with a smaller outer dimension and a larger inner dimension.

[0014] Furthermore, the pressure-stabilizing intake shaft is configured as a hollow shaft structure with circular holes of different diameters.

[0015] Furthermore, the seed cleaning mechanism includes a seed cleaning air shaft, which is positioned above the seed suction barrel, and several seed cleaning needles are positioned below the seed cleaning air shaft.

[0016] Furthermore, the seed-feeding mechanism includes a seed-feeding air shaft that extends into the seed-suction chamber and connects to an air pipe. An air pressure distribution block is located at the other end of the air pipe, and an air-sealing block is located below the air pressure distribution block. A seed-feeding needle is located at the air outlet at the bottom of the air-sealing block. An inoculation hopper seat is located between the left and right upright plates, and several inoculation hoppers are arranged on the inoculation hopper seat. The inoculation hoppers are located directly below the seed-suction barrel, and the seed-feeding needle is located directly above the inoculation hoppers.

[0017] Furthermore, the driving mechanism includes a drive motor, which is mounted on the left upright plate. The drive motor drives the seed suction barrel to rotate through a first transmission component, and the seed suction barrel drives the lead screw to rotate through a second transmission component.

[0018] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0019] The seed supply mechanism of this invention optimizes the seed box structure and adds a reciprocating auxiliary stirring component to drive the seeds to move in an orderly manner within the seed box, thereby achieving stable and orderly seed supply and solving the problem of poor seed flow and easy bridging during the seed distribution process.

[0020] The pressure-stabilizing seed suction mechanism of this invention, by designing an inverted conical seed suction hole, forms a cone-shaped opening with a small outer side and a large inner side. When the airflow passes through, the suction force increases, which can better adsorb seeds, while preventing the intake of small and easily clogged debris and avoiding blockage of the seed suction hole. At the same time, the pressure-stabilizing air intake shaft improves the stability of the airflow entering the seed suction shaft from the seed suction hole, improves the consistency of the negative pressure distribution of the seed suction hole on the seed suction barrel, and solves the problem of easy blockage of the seed suction port during the seed suction process.

[0021] The seed-feeding mechanism of this invention adopts an air-sealing-blowing method to achieve efficient seed feeding. It uses an air-sealing block to reduce the adsorption force of the seed suction hole on the center, while high-pressure airflow from inside the seed suction bucket enables the seeds to fall off efficiently and quickly, achieving consistent seed feeding distance and solving the problem of seed feeding consistency. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the dual-airflow electrically driven precision seed metering device for small-diameter seeds of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the dual-airflow electrically driven precision seed metering device for small-diameter seeds of the present invention;

[0025] Figure 3 This is a cross-sectional view of the seed suction bucket of the present invention;

[0026] Figure 4This is a schematic diagram of the seed cleaning mechanism of the present invention;

[0027] Figure 5 This is a schematic diagram of some parts of the seed-feeding mechanism of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the air-sealing block and the air pressure distribution block of the present invention.

[0029] Explanation of reference numerals in the attached drawings: 101, Seed box; 102, Lead screw bearing seat; 103, Smooth rod support; 104, Lead screw; 105, Smooth rod; 106, Smooth rod slider; 107, Seed stirring fixing seat; 108, Lead screw slider; 109, Seed stirring rod; 110, Left support of the seed box; 111, Right support of the seed box;

[0030] 201. Left upright plate; 202. Left side end cap; 203. Seed suction bucket; 204. Pressure stabilizing air intake shaft; 205. Seed suction shaft; 206. Right positioning end cap; 207. Right side end cap; 208. Right upright plate;

[0031] 301. Seed cleaning air shaft; 302. Fixing base; 303. Seed cleaning needle;

[0032] 401. Seeding air shaft; 402. Shaft positioning end cap; 403. Air tube; 404. Air pressure distribution block; 405. Left fixing plate; 406. Right fixing plate; 407. Air-sealing block; 408. Seeding needle; 409. Inoculation hopper; 410. Inoculation hopper base;

[0033] 501. Drive motor; 502. Main drive pulley; 503. Driven pulley; 504. Main drive belt; 505. Secondary drive pulley; 506. Seed stirring pulley; 507. Seed stirring drive belt. Detailed Implementation

[0034] like Figure 1-6 As shown, a dual-airflow electrically driven precision seed metering device for small-diameter seeds includes a seed supply mechanism, a pressure-stabilizing seed suction mechanism is provided behind the seed supply mechanism, a seed cleaning mechanism is provided above the pressure-stabilizing seed suction mechanism, and a seed feeding mechanism is provided below the pressure-stabilizing seed suction mechanism. It also includes a drive mechanism for driving the seed supply mechanism and the pressure-stabilizing seed suction mechanism to work.

[0035] like Figure 1As shown, the seed supply mechanism includes a seed box 101. The left and right sides of the seed box 101 are respectively bolted to a left support 110 and a right support 111. The left support 110 and the right support 111 are bolted to a left upright plate 201 and a right upright plate 208. An auxiliary seed stirring assembly is provided inside the seed box 101. The auxiliary seed stirring assembly includes a lead screw 104 disposed above the seed box 101. Lead screw bearing seats 102 are connected to the top surfaces of both the left support 110 and the right support 111. Both ends of the lead screw 104 are mounted on... On the lead screw bearing seat 102, the lead screw 104 has a bidirectional thread, and a lead screw slider 108 is threadedly connected to the lead screw 104. A guide bar 105 is provided above the lead screw 104. A guide bar support 103 is connected to the top surface of the lead screw bearing seat 102. Both ends of the guide bar 105 are mounted on the guide bar support 103. A guide bar slider 106 is slidably mounted on the guide bar 105. A seed stirring fixing seat 107 is connected to one side of the lead screw slider 108 and the guide bar slider 106. A seed stirring rod 109 is connected to the bottom of the seed stirring fixing seat 107.

[0036] When the lead screw 104 rotates, it drives the lead screw slider 108, the guide screw slider 106, the seed stirring fixing seat 107, and the seed stirring rod 109 to reciprocate linearly along the axial direction, causing the seeds to move in an orderly manner within the seed box. The seed supply mechanism, through optimized design of the seed box structure and the addition of a reciprocating auxiliary seed stirring component, drives the seeds to move in an orderly manner within the seed box, achieving stable and orderly seed supply and solving the problem of poor seed flow and bridging during seed distribution.

[0037] like Figure 1-3 As shown, the pressure-stabilizing seed suction mechanism includes a left vertical plate 201 and a right vertical plate 208. A seed suction assembly is rotatably arranged between the left vertical plate 201 and the right vertical plate 208. The seed suction assembly includes a seed suction bucket 203. A left bucket end cap 202 and a right bucket end cap 207 are respectively connected to the left and right sides of the seed suction bucket 203. The left bucket end cap 202 and the right bucket end cap 207 are rotatably mounted on the left vertical plate 201 and the right vertical plate 208, respectively. A seed suction chamber is formed between the seed suction bucket 203, the left bucket end cap 202, and the right bucket end cap 207. A pressure-stabilizing air intake shaft 204 is arranged inside the seed suction chamber. A seed suction shaft 205 is arranged on the right side of the pressure-stabilizing air intake shaft 204. The pressure-stabilizing air intake shaft 204 is fixedly connected to the seed suction shaft 205, coaxially installed in the right positioning end cap 206, and passes through the right positioning end cap 206 to enter the seed suction chamber.

[0038] The seed suction bucket 203 is configured as a thin-walled annular structure. The main body of the seed suction bucket 203 is provided with a single row or multiple rows of seed suction holes according to the seed dispensing requirements. The seed suction holes are configured as an inverted conical structure. The outer size of the seed suction hole is small and the inner size is large. When the airflow passes through, the suction force increases, which can better adsorb the seeds. At the same time, small and easily clogged debris is sucked in to avoid clogging the seed suction port.

[0039] The pressure-stabilizing air intake shaft 204 is a hollow shaft structure with circular holes of different diameters. Since it is a unilateral seed suction, if the holes are all the same diameter, the airflow at the near end and far end of the seed suction port will be inconsistent. Therefore, different diameters are used to keep the airflow at each hole as consistent as possible. The design of the pressure-stabilizing air intake shaft 204 improves the stability of the airflow entering the pressure-stabilizing air intake shaft 204 from the seed suction hole and improves the consistency of the negative pressure distribution at the seed suction hole on the seed suction barrel 203.

[0040] The seed suction barrel 203 rotates clockwise around the central power output shaft. The entire seed suction barrel 203 has a hollow structure. The seed suction barrel 203 has an inverted trumpet-shaped seed suction hole on its shell. The vacuum pump is connected to the seed suction shaft 205, and the pressure stabilizing air intake shaft 204 is fixedly connected to the seed suction shaft 205. During operation, the pressure stabilizing seed suction mechanism connects to the vacuum pump to provide negative pressure to the seed suction barrel 203. The seed suction barrel 203 carries the seeds in the seed box to the lowest point of the seed suction barrel 203. A seed feeding needle is connected in the cavity to provide positive pressure to the lowest point and blow out the seeds.

[0041] like Figure 4 As shown, the seed cleaning mechanism includes a seed cleaning air shaft 301, which is positioned above the seed suction barrel 203. The two sides of the seed cleaning air shaft 301 are fixedly mounted on the left upright plate 201 and the right upright plate 208 respectively via fixing seats 302. Several seed cleaning needles 303 are installed below the seed cleaning air shaft 301. The number of seed cleaning needles 303 varies depending on the number of seed rows. The seed cleaning needles 303 are arranged vertically, with their bottoms aligned with the seed discharge holes of the seed suction barrel 203. Airflow enters the air pipe through the air inlet on the seed cleaning air shaft 301 and forms an airflow layer through the lower seed cleaning needles 303, blowing away excess seeds adsorbed on the surface of the seed suction barrel 203, thus completing the seed cleaning process.

[0042] like Figure 2 As shown, the seed-feeding mechanism includes a seed-feeding air shaft 401, which is coaxially mounted inside the shaft positioning end cover 402 and passes through the left barrel end cover 202 into the seed suction chamber, and is connected to an air pipe 403. The other end of the air pipe 403 is connected to an air pressure distribution block 404. The left and right sides of the air pressure distribution block 404 are respectively fixedly connected to a left fixing plate 405 and a right fixing plate 406. The left fixing plate 405 is coaxially fixed to the seed-feeding air shaft 401, and the right fixing plate 406 is coaxially mounted on the pressure-stabilizing air intake shaft 204. Figure 5As shown, the air pressure distribution block 404 has a long strip structure with an internal cavity. Airflow enters the cavity from one side of the air pipe 403, and air outlets are evenly distributed at the bottom. The seeding needle 408 is fixedly connected to it. Figure 6 As shown, the air-sealing block 407 is fixedly connected to the lower part of the air pressure distribution block 404. It has a fan-shaped structure and forms a certain gap with the inner wall of the seed suction barrel 203. The air-sealing block 407 has a through hole through which the seed-feeding needle 408 can pass. After passing through the through hole, the seed-feeding needle 408 extends to the bottom of the air-sealing block 407.

[0043] An inoculation hopper 409 is located directly below the seed suction bucket 203. An inoculation hopper seat 410 is connected between the left upright plate 201 and the right upright plate 208. The inoculation hopper 409 is fixedly connected to the inoculation hopper seat 410. The seed dispensing needle 408 is located directly above the inoculation hopper 409. Airflow enters through the seed dispensing air shaft 401, enters the air pressure distribution block 404 through the air pipe 403, and exits through the seed dispensing needle 408, blowing the seeds adsorbed by the seed dispensing hole of the seed suction bucket 203 into the inoculation hopper 409.

[0044] The seed-feeding device designed in this invention adopts an air-sealing-blowing method to achieve efficient seed feeding. It uses an air-sealing block to reduce the suction force of the seed suction port on the center, while high-pressure airflow from inside the seed suction bucket enables the seeds to fall off efficiently and quickly, thus solving the problem of seed feeding consistency.

[0045] like Figure 2 As shown, the driving mechanism includes a drive motor 501, which is mounted on the left upright plate 201. The drive motor 501 drives the seed suction bucket 203 to rotate via a first transmission assembly. The first transmission assembly includes a main drive pulley 502, a driven pulley 503, and a main drive belt 504. The main drive pulley 502 is mounted on the output shaft of the drive motor 501, and the driven pulley 503 is mounted on the left end cover 202 of the pressure-stabilizing seed suction mechanism. The pulley 502 and the driven pulley 503 are connected by a main drive belt 504; the seed suction bucket 203 drives the lead screw 104 to rotate through a second transmission assembly. The second transmission assembly includes a secondary drive pulley 505, a seed stirring pulley 506, and a seed stirring drive belt 507. The secondary drive pulley 505 is mounted on the right end cover 207 of the bucket, and the seed stirring pulley 506 is mounted on the lead screw 104. The secondary drive pulley 505 and the seed stirring pulley 506 are connected by a seed stirring drive belt 507.

[0046] During operation, the drive motor 501 drives the main drive pulley 502 to rotate. The rotation of the main drive pulley 502 drives the driven pulley 503 to rotate through the main drive belt 504, thereby driving the seed suction bucket 203 to rotate. The rotation of the seed suction bucket 203 drives the auxiliary drive pulley 505 to rotate. The rotation of the auxiliary drive pulley 505 drives the seed stirring pulley 506 to rotate through the seed stirring drive belt 507, thereby driving the lead screw 104 to rotate.

[0047] The working process of this invention is as follows:

[0048] First, the left upright plate 201 and the right upright plate 208 are bolted to the tractor. Then, as the tractor moves forward, the drive motor 501 is started. The drive motor 501 drives the main drive pulley 502 to rotate. The rotation of the main drive pulley 502 drives the driven pulley 503 to rotate through the main drive belt 504, thereby driving the seed suction bucket 203 to rotate. The rotation of the seed suction bucket 203 drives the auxiliary drive pulley 505 to rotate. The rotation of the auxiliary drive pulley 505 drives the seed stirring pulley 506 to rotate through the seed stirring drive belt 507, thereby driving the lead screw 104 to rotate.

[0049] This device can be used in conjunction with existing seedling production lines via the left and right upright plates, or it can be used independently by connecting it to a tractor.

[0050] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A dual-airflow electrically driven precision seed metering device for small-diameter seeds, characterized in that: The device includes a seed supply mechanism, a pressure-stabilizing seed suction mechanism located behind the seed supply mechanism, a seed cleaning mechanism located above the pressure-stabilizing seed suction mechanism, and a seed dispensing mechanism located below the pressure-stabilizing seed suction mechanism. It also includes a drive mechanism for driving the seed supply mechanism and the pressure-stabilizing seed suction mechanism.

2. The dual-airflow electrically driven precision seed metering device for small-diameter seeds according to claim 1, characterized in that: The seed supply mechanism includes a seed box (101), and a seed box left support (110) and a seed box right support (111) are respectively provided on the left and right sides of the seed box (101). The seed box left support (110) and the seed box right support (111) are provided on the pressure stabilizing seed suction mechanism. An auxiliary seed stirring component is provided inside the seed box (101).

3. The dual-airflow electrically driven precision seed metering device for small-diameter seeds according to claim 2, characterized in that: The auxiliary seed stirring assembly includes a lead screw (104) disposed above the seed box (101), the lead screw (104) is provided with a bidirectional thread, the lead screw (104) is threadedly connected to a lead screw slider (108), a light bar (105) is disposed above the lead screw (104), a light bar slider (106) is disposed on the light bar (105), a seed stirring fixing seat (107) is disposed on one side of the lead screw slider (108) and the light bar slider (106), and a seed stirring rod (109) is disposed below the seed stirring fixing seat (107).

4. The dual-airflow electrically driven precision seed metering device for small-diameter seeds according to claim 3, characterized in that: The pressure-stabilizing seed suction mechanism includes a left vertical plate (201) and a right vertical plate (208). A seed suction assembly is rotatably arranged between the left vertical plate (201) and the right vertical plate (208). The seed suction assembly includes a seed suction bucket (203). A left bucket end cap (202) and a right bucket end cap (207) are respectively arranged on the left and right sides of the seed suction bucket (203). The left bucket end cap (202) and the right bucket end cap (207) are respectively rotatably arranged on the left vertical plate (201) and the right vertical plate (208). A seed suction chamber is formed between the seed suction bucket (203), the left bucket end cap (202) and the right bucket end cap (207). A pressure-stabilizing air intake shaft (204) is arranged inside the seed suction chamber. A seed suction shaft (205) is arranged on the right side of the pressure-stabilizing air intake shaft (204).

5. The dual-airflow electrically driven precision seed metering device for small-diameter seeds according to claim 4, characterized in that: The seed suction bucket (203) is configured as a thin-walled circular structure, and the main body of the seed suction bucket (203) is provided with a single row or multiple rows of seed suction holes according to the seed dispensing requirements.

6. The dual-airflow electrically driven precision seed metering device for small-diameter seeds according to claim 5, characterized in that: The seed suction hole is designed with an inverted conical structure, with a smaller outer dimension and a larger inner dimension.

7. The dual-airflow electrically driven precision seed metering device for small-diameter seeds according to claim 4, characterized in that: The pressure-stabilizing intake shaft (204) is configured as a hollow shaft structure with circular holes of different diameters.

8. The dual-airflow electrically driven precision seed metering device for small-diameter seeds according to claim 4, characterized in that: The seed cleaning mechanism includes a seed cleaning air shaft (301), which is located above the seed suction barrel (203), and several seed cleaning needles (303) are located below the seed cleaning air shaft (301).

9. The dual-airflow electrically driven precision seed metering device for small-diameter seeds according to claim 4, characterized in that: The seed feeding mechanism includes a seed feeding air shaft (401), which extends into the seed suction chamber and is connected to an air pipe (403). An air pressure distribution block (404) is provided at the other end of the air pipe (403). An air-sealing block (407) is provided below the air pressure distribution block (404). A seed feeding needle (408) is provided at the air outlet at the bottom of the air-sealing block (407). An inoculation bucket seat (410) is provided between the left upright plate (201) and the right upright plate (208). A plurality of inoculation buckets (409) are provided on the inoculation bucket seat (410). The inoculation buckets (409) are located directly below the seed suction bucket (203), and the seed feeding needle (408) is located directly above the inoculation buckets (409).

10. The dual-airflow electrically driven precision seed metering device for small-diameter seeds according to claim 4, characterized in that: The driving mechanism includes a drive motor (501), which is mounted on the left upright plate (201). The drive motor (501) drives the seed suction barrel (203) to rotate through the first transmission component, and the seed suction barrel (203) drives the lead screw (104) to rotate through the second transmission component.

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