An agricultural intelligent planting and seeding device

Abstract

The application discloses an agricultural intelligent planting and seeding device and belongs to the technical field of intelligent agricultural tools. The agricultural intelligent planting and seeding device comprises a seeding hopper, a connector is fixed on the front face of the seeding hopper, a discharging pipe is assembled at the bottom of the seeding hopper, an atomization assembly for uniformly spraying fungicides on seeds in the discharging pipe is assembled on the back face of the seeding hopper, a furrow opener is assembled at the front end of the lower surface of the seeding hopper, and support plates are fixed on the two sides of the lower surface of the seeding hopper in a symmetrical mode. The material distribution assembly is arranged, beans are uniformly discharged one by one in the seeding process, the seed accumulation can be effectively avoided, a seeding roller is arranged in the material distribution bin, and only one seed can be accommodated in the seed hole formed in the seeding roller; the structure ensures that the seeds can be sequentially dropped, the seeding uniformity is improved, no additional power source is needed during the operation of the material distribution assembly, the labor cost is reduced, and the device is suitable for long-time operation.

Description

Technical Field

[0001] This invention belongs to the field of intelligent agricultural equipment technology, specifically relating to an intelligent agricultural planting and sowing device. Background Technology

[0002] Currently, the few seeders on the market with microbial agent spraying functions typically perform a surface spray before the seeds fall into the seed furrow. This method ensures that the microbial agent comes into contact with each seed. However, during spraying, the atomized agent liquefies on the tube wall, causing some of the microbial agent to be lost. This can lead to a significant loss of microbial agent during rapid operation. Furthermore, the device cannot achieve uniform seed distribution, sometimes resulting in no seeds falling through the spray tube. The covering process lacks coordination with the spraying process, frequently leading to incomplete soil covering.

[0003] The announcement number CN121100639B discloses an intelligent agricultural sowing device and method for agricultural planting, relating to the technical field of intelligent sowing equipment for legume seeds. It includes a sowing hopper, a support plate vertically mounted on the lower surface of the sowing hopper, a drive wheel rotatably mounted on the lower end of the support plate via a rotating shaft, a connecting rod on the side of the sowing hopper, a furrow opener and a soil coverer mounted on the sowing hopper, and openings at both the top and bottom of the sowing hopper. A sowing block is mounted inside the lower part of the sowing hopper, with the lower surface of the sowing block flush with the lower surface of the sowing hopper. A matching sowing roller is rotatably mounted in a circular groove on the sowing block.

[0004] According to the aforementioned application documents, the existing equipment has poor seed distribution uniformity during the sowing process, which easily leads to seed accumulation or gaps, resulting in intermittent seed dispensing from the sowing tube and affecting the sowing quality. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an intelligent agricultural planting and sowing device that solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides an intelligent agricultural planting and sowing device, including a sowing hopper, a connector fixed to the front of the sowing hopper, a feeding pipe assembled at the bottom of the sowing hopper, an atomizing component for uniformly spraying microbial agents onto the seeds inside the feeding pipe assembled at the back of the sowing hopper, a furrow opener assembled at the front end of the lower surface of the sowing hopper, and support plates symmetrically fixed on both sides of the lower surface of the sowing hopper, with drive wheels rotatably connected to the sides of the two support plates via drive shafts. A material distribution assembly is assembled between the two support plates. The material distribution assembly includes a material distribution bin, the top of which is connected to a discharge pipe. The bottom of the material distribution bin is fixed and connected to a spreading pipe. A seeding roller is installed inside the material distribution bin. Seed holes are opened on the outer surface of the seeding roller. A seeding shaft is rotatably connected through the axis of the seeding roller. A belt is rotatably connected to one end of the seeding shaft. An irregularly shaped seeding block is fixed inside the material distribution bin. A drainage groove is opened on the upper surface of the irregularly shaped seeding block. A screen is installed above the drainage groove and fixed to the inner wall of the material distribution bin. A liquid collection tank is opened inside the material distribution bin.

[0007] According to the above technical solution, the liquid collection tank is located inside the distribution bin and on the side away from the seeding roller.

[0008] According to the above technical solution, the top of the material distribution bin is provided with a hole adapted to the material discharge pipe.

[0009] According to the above technical solution, a volumetric extrusion assembly is assembled on the side of one side of the support plate. The volumetric extrusion assembly includes a C-shaped pressure block, which is fixed to one side of the support plate. An annular groove is formed on the inner wall of the C-shaped pressure block. A bushing is fixed at the center of the annular groove. Three rollers are rotatably connected to the outer surface of the bushing in a circular and uniform manner. A peristaltic pump tube is provided on the outer surface of the three rollers. An L-shaped rod is rotatably connected to the axis of each of the three rollers. The other end of each L-shaped rod is fixed to the drive shaft.

[0010] According to the above technical solution, a hole adapted to fix the peristaltic pump tube is opened on one side of the liquid collection tank.

[0011] According to the above technical solution, the laying trajectory of the peristaltic pump tube is placed on the outer surface of the roller and closely attached to the inner wall of the C-shaped pressure block.

[0012] According to the above technical solution, a compaction and covering soil assembly is installed on the lower surface of the material distribution bin. The compaction and covering soil assembly includes two sleeves, which are fixed to the lower surface of the material distribution bin. Springs are installed inside the two sleeves, and limit plates are fixed to the other ends of the two springs. Compacting columns are fixed to the lower surfaces of the two limit plates, and compaction plates are fixed to the lower surfaces of the two sleeves. Two fixing frames are fixed to the lower surface of the material distribution bin. A rotating shaft is rotatably connected to the side of the two fixing frames near the ground. Gear 1 is fixed to the side of the rotating shaft near the support plate. Gear 2 is fixed to the end of the drive shaft away from the drive wheel. Gear 2 meshes with gear 1. A cam is fixed to the side of the rotating shaft away from the support plate. A mounting frame is installed at the lower end of the seeding hopper, and a covering soil device is hinged to the bottom of the mounting frame.

[0013] According to the above technical solution, the outer surface of the sleeve is provided with holes adapted to slide connection with the limiting plate.

[0014] According to the above technical solution, the cam is below the limiting plate and the rotation trajectory of the cam can touch the limiting plate.

[0015] The advantages of this application are: (1) By setting up a material distribution component, this application can achieve uniform discharge of soybean seeds one by one during the sowing process, which can effectively avoid seed accumulation. The material distribution bin is equipped with a sowing roller, and the seed hole opened on the sowing roller can only hold one seed. This structure ensures that the seeds can fall in an orderly manner, improving the sowing uniformity. The material distribution component does not require an additional power source during operation, reducing labor costs and making it suitable for long-term operation.

[0016] (2) This application achieves the reuse of microbial agent during the sowing process by using a volume extrusion component and a liquid collection tank in cooperation with each other, which greatly reduces the waste of microbial agent. This circulation structure enables the liquefied microbial agent to be recycled and reused, which can effectively prevent the problem of microbial agent loss after liquefaction on the pipe wall in traditional equipment. The utilization of microbial agent is greatly improved, which not only saves the cost of microbial agent, but also ensures that the amount of microbial agent attached to the surface of each seed is uniform.

[0017] (3) This application achieves the functions of compaction and soil covering during the sowing process by using the compaction and soil covering components and the drive shaft. This can effectively improve the efficiency of soil covering operations. The compaction frequency is related to the sowing speed. When the operation speed is fast, the compaction frequency will increase, and when the speed is slow, it will decrease. This can effectively avoid the problem of incomplete soil covering. This structure does not require any external force and improves the tightness of contact between the soil and the seeds after sowing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall appearance structure of the present invention; Figure 2 This is a partial structural diagram of the present invention. Figure 1 ; Figure 3 This is a partial structural diagram of the present invention. Figure 2 ; Figure 4 This is a partial structural diagram of the present invention. Figure 3 ; Figure 5 This is a schematic diagram of the volumetric extrusion structure of the present invention; Figure 6 This is an enlarged structural schematic diagram of the three-dimensional view A of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the main components of the present invention. Figure 1 ; Figure 8 This is a partial structural diagram of the present invention. Figure 3 ; Figure 9 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 10 This is a schematic diagram of the cross-sectional structure of the main components of the present invention. Figure 2 .

[0019] Explanation of key figure labels: 100. Seeding hopper; 200. Connector; 300. Support plate; 400. Atomizing assembly; 401. Feeding pipe; 500. Furrow opener; 600. Volumetric extrusion assembly; 601. Bushing; 602. Roller; 603. L-shaped rod; 604. Peristaltic pump pipe; 605. Annular groove; 606. C-shaped pressure block; 700. Distributing assembly; 701. Seeding shaft; 702. Seeding roller; 703. Seed hole; 704. Irregularly shaped seeding block; 705. Liquid collection device. 706. Trough; 707. Screen; 708. Diversion trough; 709. Distribution bin; 710. Spreading pipe; 710. Belt; 800. Compacting and covering assembly; 801. Sleeve; 802. Compacting column; 803. Limiting plate; 804. Rotating shaft; 805. Gear one; 806. Spring; 807. Cam; 808. Compacting plate; 809. Fixing frame; 810. Gear two; 811. Mounting frame; 812. Covering device; 901. Drive wheel; 902. Drive shaft. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0021] Example 1, as Figures 1-4As shown, an intelligent agricultural planting and sowing device includes a sowing hopper 100. A connector 200 is fixed to the front of the sowing hopper 100. A feeding pipe 401 is assembled at the bottom of the sowing hopper 100. An atomizing component 400 for uniformly spraying microbial agents onto the seeds inside the feeding pipe 401 is assembled at the back of the sowing hopper 100. A furrow opener 500 is assembled at the front end of the lower surface of the sowing hopper 100. Support plates 300 are symmetrically fixed to both sides of the lower surface of the sowing hopper 100. The sides of the two support plates 300 are rotatably connected to drive wheels 901 via drive shafts 902. A material distribution assembly 700 is assembled between the support plates 300. The material distribution assembly 700 includes a material distribution bin 708. The top of the material distribution bin 708 is connected to the discharge pipe 401, and the bottom of the material distribution bin 708 is fixed and connected to a spreading pipe 709. The top of the material distribution bin 708 has a hole adapted to the discharge pipe 401. A sowing roller 702 is installed inside the material distribution bin 708. The purpose of the sowing roller 702 is to ensure that the seeds can be sown more evenly. When the sowing roller 702 rotates, it enables the material distribution assembly 700 to sow evenly. The outer surface of the sowing roller 702 is... The device includes a seed hole 703. To ensure the seeding is suitable for individual seeds, a seeding shaft 701 is rotatably connected through the axis of the seeding roller 702. A belt 710 is rotatably connected to one end of the seeding shaft 701. To ensure uniform seeding speed, the drive wheel 901 rolls against the ground as the device moves forward, transmitting rotational power to the belt 710 via the drive shaft 902. The belt 710 then transmits the power to the seeding shaft 701. Irregularly shaped seed blocks 704 are fixed inside the distribution bin 708. The upper surface of the irregularly shaped seeding block 704 is provided with a drainage groove 707. The drainage groove 707 is provided to guide the atomized bacterial agent after it is liquefied in the pipeline. A screen 706 is provided above the drainage groove 707 and fixed to the inner wall of the distribution bin 708. The inside of the distribution bin 708 is provided with a liquid collection tank 705. The liquid collection tank 705 is provided to collect the bacterial agent for reuse. Excess bacterial agent will gather into liquid and flow into the liquid collection tank 705 through the drainage groove 707. The liquid collection tank 705 is located inside the distribution bin 708 and on the side away from the seeding roller 702.

[0022] In practical use, before sowing, the operator first connects the connector 200 to the rear of the sowing hopper 100 and the tractor. The tractor then drives the device to work in an orderly manner along the field. After the device is started, the operator pours the soybean seeds into the sowing hopper 100. Under the action of the seeds' own weight, the seeds will roll down to the bottom of the sowing hopper 100 and pass through the feeding pipe 401. When seeds pass through the feeding pipe 401, the atomizing component 400 starts to work, evenly spraying the microbial agent onto each seed that passes through the feeding pipe 401, so that the surface of each seed is covered with a layer of microbial agent. As the device moves forward, the drive wheel 901 rolls in contact with the ground, transmitting rotational power to the belt 710 via the drive shaft 902. The belt 710 then transmits the power to the sowing shaft 701, which in turn rotates the sowing roller 702 inside the distribution bin 708. After the seeds fall from the feed pipe 401 into the distribution bin 708, they first come into contact with the screen 706. Because the surface of the screen 706 has many small pores, it filters out excess inoculant sprayed onto the seed surface. This excess inoculant then accumulates into a liquid, flowing through the drainage channel 707 into the collection tank 705. Since the seed hole 703 is designed to hold only one bean seed at a time... Therefore, when the seeding roller 702 rotates, the seeds fall one by one in an orderly manner. During the seed falling process, the rotation speed of the seeding roller 702 is synchronized with the rotation speed of the drive wheel 901. When the tractor's forward speed increases, the rotation of the seeding roller 702 also increases, and when the tractor's forward speed decreases, the rotation of the seeding roller 702 also decreases, and the seed falling will also decrease. During the spraying process of the atomizing component 400, some of the microbial agent will also liquefy on the pipe wall and flow into the distribution bin 708 along the inner wall of the pipe. Then, it will be introduced into the collection bin 705 for storage through the diversion channel 707. This can effectively avoid the waste and loss of microbial agent. During the distribution process, no other external force is required as a power source.

[0023] Example 2, as Figures 5-7As shown, based on Embodiment 1, a volumetric compression assembly 600 is mounted on the side of a support plate 300. The volumetric compression assembly 600 includes a C-shaped pressure block 606, which is fixed to one side of the support plate 300. An annular groove 605 is provided on the inner wall of the C-shaped pressure block 606. The purpose of providing the annular groove 605 is to ensure that the rollers 602 do not shift. A bushing 601 is fixed at the center of the annular groove 605. Three rollers 602 are rotatably connected to the outer surface of the bushing 601 in a circular shape. When the three rollers 602 rotate, they will rotate along the annular groove 605 on the inner wall of the C-shaped pressure block 606. A peristaltic pump tube 604 is provided on the outer surface of the three rollers 602. When one of the three rollers 602 presses over the peristaltic pump tube 604, that section of the peristaltic pump tube 604 will be flattened. At this time, the volume inside the peristaltic pump tube 604 will decrease, and the bacterial agent inside the peristaltic pump tube 604 will be pushed forward. When the roller 602 no longer squeezes the peristaltic pump tube 604, the peristaltic pump tube 604 will return to its original shape through its own elasticity. When the volume inside the peristaltic pump tube 604 increases, a negative pressure suction force will be generated inside the peristaltic pump tube 604, which will perform a suction action on the bacterial agent in the collection tank 705. The purpose of setting the peristaltic pump tube 604 is to ensure that the bacterial agent can be well delivered. The laying trajectory of the peristaltic pump tube 604 is placed on the outer surface of the roller 602 and closely attached to the inner wall of the C-shaped pressure block 606. A hole adapted to fix the peristaltic pump tube 604 is opened on one side of the collection tank 705. An L-shaped rod 603 is rotatably connected to the axis of each of the three rollers 602, and the other end of the L-shaped rod 603 is fixed on the drive shaft 902.

[0024] When the above-mentioned equipment is in use, the volumetric compression component 600 will also be activated to collect the liquid bacterial agent and press it back into the seeding hopper 100. When the drive wheel 901 rotates, it will drive the drive shaft 902 to rotate. The rotation of the drive shaft 902 will drive the three fixed L-shaped rods 603 to rotate. The rotation of the three L-shaped rods 603 will drive the three rollers 602 to rotate. When the three rollers 602 rotate, they will rotate along the annular groove 605 on the inner wall of the C-shaped pressure block 606. At this time, the peristaltic pump tube 604 is repeatedly squeezed by the three rollers 602. When one of the rollers 602 passes over the peristaltic pump tube 604, that section of the peristaltic pump tube 604 is flattened. At this point, the internal volume of the peristaltic pump tube 604 decreases, and the bacterial agent inside the peristaltic pump tube 604 is pushed forward. When the rollers 602 stop squeezing the peristaltic pump tube 604, the peristaltic pump tube 604 will return to its original shape through its own elasticity. When the internal volume of the peristaltic pump tube 604 increases, negative pressure is generated inside the peristaltic pump tube 604. The suction force draws the bacterial agent from the collection tank 705. Since one end of the peristaltic pump pipe 604 is connected to the collection tank 705 and the other end is connected to the upper surface of the seeding hopper 100, the peristaltic pump pipe 604 delivers the bacterial agent to the seeding hopper 100 for effective secondary utilization. The volumetric extrusion component 600 is related to the forward speed of the tractor. The faster the tractor moves forward, the faster the roller 602 rotates, and the larger the amount of bacterial agent used. The slower the tractor moves forward, the smaller the amount of bacterial agent used.

[0025] Example 3, as Figures 8-10As shown, based on Embodiment 2, a compaction and covering soil assembly 800 is installed on the lower surface of the distribution bin 708. The compaction and covering soil assembly 800 includes two sleeves 801, which are fixed to the lower surface of the distribution bin 708. Springs 806 are installed inside the two sleeves 801, and limit plates 803 are fixed to the other ends of the two springs 806. Holes adapted for sliding connection with the limit plates 803 are opened on the outer surface of the sleeves 801. Compacting columns 802 are fixed to the lower surfaces of the two limit plates 803, and springs 806 are installed thereon. 6. To ensure the compaction column 802 is reset, a compaction plate 808 is fixed to the lower surface of the two sleeves 801. The purpose of setting the compaction plate 808 is to ensure the compaction area of ​​the land and increase the seed survival rate. Two fixing frames 809 are fixed to the lower surface of the distribution bin 708. A rotating shaft 804 is connected through and rotatably to the side of the two fixing frames 809 near the ground. A gear 805 is fixed to the side of the rotating shaft 804 near the support plate 300. A gear 810 is fixed to the end of the drive shaft 902 away from the drive wheel 901. 0 meshes with gear 805. A cam 807 is fixed to the side of the rotating shaft 804 away from the support plate 300. When the cam 807 rotates one revolution, it pushes the limiting plate 803 once. When the protruding part of the cam 807 rotates to the top, the cam 807 contacts the limiting plate 803, causing the limiting plate 803 to be pushed upwards. The limiting plate 803 drives the compaction column 802 to rise. When the compaction column 802 rises, the spring 806 inside the sleeve 801 is compressed. When the cam 807 continues to rotate... When the limiting plate 803 loses its support, the spring 806 will quickly return to its original position. The spring 806 will push the limiting plate 803 downwards to return to its original position. The tamping column 802 will drive the tamping plate 808 to move. The cam 807 is below the limiting plate 803 and the rotation trajectory of the cam 807 can touch the limiting plate 803. The lower surface end of the seeding hopper 100 is equipped with a mounting frame 811. The bottom of the mounting frame 811 is hinged with a soil covering device 812. The movement of the soil covering device 812 will push the excess soil on both sides of the seed furrow back into the furrow, further completing the soil covering action.

[0026] In practical use, as the device moves forward, the furrow opener 500 first creates suitable furrows in the soil for sowing. As seeds are discharged one by one into the furrows through the sowing pipe 709, the soil compaction assembly 800 repeatedly compacts the soil layer. As the drive shaft 902 rotates continuously during forward movement, the gear 810 fixed to the end of the drive shaft 902 also rotates. Due to the meshing of gear 810 and gear 805, the rotation of gear 810 drives gear 805 to rotate, which in turn drives the rotating shaft 804 to rotate. The fixing bracket 809 prevents the rotating shaft 804 from shifting. When the rotating shaft 804 rotates, the cam 807 also rotates. When the cam 807 completes one revolution, it engages with the limiting plate. When cam 803 performs a pushing action, and the protruding part of cam 807 rotates to the top, cam 807 contacts limit plate 803, and limit plate 803 is pushed upward. At this time, limit plate 803 drives compaction column 802 to rise. When compaction column 802 rises, spring 806 in sleeve 801 is compressed. When cam 807 continues to rotate, limit plate 803 loses support, spring 806 quickly returns to its original position, and spring 806 pushes limit plate 803 downward. Compaction column 802 drives compaction plate 808 to perform an impact, thereby compacting the soil. At this time, cover soil 812 pushes excess soil on both sides of the planting furrow back into the furrow, further completing the covering action. When the tractor moves forward quickly, the compaction frequency will also increase, and when the tractor moves forward slowly, the compaction frequency will also decrease.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An intelligent agricultural planting and sowing device, comprising a sowing hopper, a connector fixed to the front of the sowing hopper, a feeding pipe assembled at the bottom of the sowing hopper, an atomizing component for uniformly spraying microbial agents onto the seeds inside the feeding pipe assembled at the back of the sowing hopper, a furrow opener assembled at the front end of the lower surface of the sowing hopper, and support plates symmetrically fixed on both sides of the lower surface of the sowing hopper, with drive wheels rotatably connected to the sides of both support plates via drive shafts. Its features are: A material distribution assembly is assembled between the two support plates. The material distribution assembly includes a material distribution bin, the top of which is connected to a discharge pipe. The bottom of the material distribution bin is fixed and connected to a spreading pipe. A seeding roller is installed inside the material distribution bin. Seed holes are opened on the outer surface of the seeding roller. A seeding shaft is rotatably connected through the axis of the seeding roller. A belt is rotatably connected to one end of the seeding shaft. An irregularly shaped seeding block is fixed inside the material distribution bin. A drainage groove is opened on the upper surface of the irregularly shaped seeding block. A screen is installed above the drainage groove and fixed to the inner wall of the material distribution bin. A liquid collection tank is opened inside the material distribution bin.

2. The intelligent agricultural planting and sowing device according to claim 1, characterized in that, The liquid collection tank is located inside the distribution bin and on the side away from the seeding roller.

3. The intelligent agricultural planting and sowing device according to claim 2, characterized in that, The top of the material distribution bin has holes adapted to the material discharge pipe.

4. The intelligent agricultural planting and sowing device according to claim 3, characterized in that, A volumetric extrusion assembly is mounted on the side of one side of the support plate. The volumetric extrusion assembly includes a C-shaped pressure block, which is fixed to one side of the support plate. An annular groove is formed on the inner wall of the C-shaped pressure block. A bushing is fixed at the center of the annular groove. Three rollers are rotatably connected to the outer surface of the bushing in a circular and uniform manner. A peristaltic pump tube is provided on the outer surface of the three rollers. An L-shaped rod is rotatably connected to the axis of each of the three rollers. The other end of each L-shaped rod is fixed to the drive shaft.

5. The intelligent agricultural planting and sowing device according to claim 4, characterized in that, One side of the liquid collection tank is provided with a hole adapted to fix the peristaltic pump tube.

6. The intelligent agricultural planting and sowing device according to claim 5, characterized in that, The peristaltic pump tube is laid along the outer surface of the roller and closely adheres to the inner wall of the C-shaped pressure block.

7. The intelligent agricultural planting and sowing device according to claim 6, characterized in that, The lower surface of the material distribution bin is equipped with a compaction and covering soil assembly. The compaction and covering soil assembly includes two sleeves, which are fixed to the lower surface of the material distribution bin. Springs are installed inside the two sleeves, and limit plates are fixed to the other ends of the two springs. Compacting columns are fixed to the lower surfaces of the two limit plates, and compaction plates are fixed to the lower surfaces of the two sleeves. Two fixing frames are fixed to the lower surface of the material distribution bin. A rotating shaft is rotatably connected to the two fixing frames on the side near the ground. Gear 1 is fixed to the side of the rotating shaft near the support plate. Gear 2 is fixed to the end of the drive shaft away from the drive wheel. Gear 2 meshes with gear 1. A cam is fixed to the side of the rotating shaft away from the support plate. A mounting frame is installed at the lower end of the seeding hopper, and a covering soil device is hinged to the bottom of the mounting frame.

8. The intelligent agricultural planting and sowing device according to claim 7, characterized in that, The outer surface of the sleeve is provided with holes adapted to slide connection with the limiting plate.

9. The intelligent agricultural planting and sowing device according to claim 8, characterized in that, The cam is located below the limiting plate, and the rotation trajectory of the cam can touch the limiting plate.

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