Dual-corn seed metering device with double discs and synchronization seeding

Abstract

The utility model discloses a double -disc synchronous sowing's double -grain corn seed metering device relates to agricultural implement technical field, including the frame, the frame one end middle fixedly connected with the towing frame, the frame is away from the one side fixedly connected with a plurality of seed boxes of towing frame, the frame middle rotatable connection has the hollow shaft, the seed box is close to the one side of towing frame all is established with two evasion groove, and the position of hollow shaft is located in evasion groove all fixedly connected with the hollow disc, and the hollow disc is connected with the hollow axle inside, the utility model discloses be equipped with two hollow discs on every seed box, and two hollow discs are same, and two hollow discs coaxial transmission make in the sowing, can adsorb corn seed simultaneously, and when rotating to seed metering box, release seed together, and the seed falls into the soil under the guidance of sowing pipe, guarantees the interval of two seeds in the range of requirement, realizes the sowing requirement of double -grain isotope.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, specifically a dual-disc synchronous seed metering device for corn. Background Technology

[0002] Corn planters are the main equipment for mechanized corn planting, significantly improving planting efficiency and precision while reducing labor costs. Their planting efficiency and yield directly impact agricultural production benefits. With the widespread adoption of precision seeding technology, most existing corn planting equipment is now single-seed precision planters. By controlling the rotation speed of the seed metering device and the forward speed of the machine, a set plant spacing is achieved, typically maintained at 25-35cm, to achieve a reasonable density and reduce thinning operations.

[0003] In terms of row spacing control, existing technologies mainly adopt two modes. The first is equal row spacing configuration, such as maintaining the row spacing at 60-70cm. Its advantage is that the seeder has a simple structure, but high-density planting can easily lead to insufficient ventilation and light penetration between plants, severe shading of plants, increased risk of pests and diseases, and easy crushing of plants during later large-scale agricultural machinery operations. The second is simple wide and narrow row configuration, such as maintaining a spacing of 80-90cm between wide rows and 40-50cm between narrow rows. Although it improves ventilation conditions to some extent, the width of the wide rows still cannot fully match the operating width of mainstream large-scale agricultural machinery, resulting in low efficiency and increased operating costs for later management operations such as cultivation, topdressing, and aerial spraying.

[0004] To further increase yield per unit area, some existing technologies have attempted to adopt a double-seed planting scheme, which involves planting two seeds at once to improve the survival rate of the entire population by supplementing the seedlings with the double seed. However, most existing double-seed planting schemes rely on single-disc seed metering devices. These devices use a double-hole design on a single seed metering disc, allowing one hole to hold two seeds. The two seeds are then simultaneously planted using the air suction principle. However, in practical applications, this scheme has been found to have poor adaptability to seed size due to the natural size differences of corn seeds. This can easily lead to problems such as only one seed being held or seed jamming during planting. In addition, even if two seeds are held simultaneously, the lack of a seed guiding and positioning mechanism results in a large deviation in the lateral spacing between the two seeds after they land. The lateral spacing after the seeds land should be within the range of 3-8 cm. Existing technologies cannot guarantee that the seeds will be in the same position, resulting in uneven plant spacing after emergence and poor uniformity of the population. This actually increases the workload of thinning the seedlings later and makes it difficult to achieve the goal of increasing the yield of the entire population.

[0005] To address these issues, we provide a dual-disc synchronous seed metering device for corn to overcome the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a dual-disc synchronous seed metering device for corn, in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A dual-disc synchronous seed metering device for double-grain corn includes a frame. A traction frame is fixedly connected to the middle of one end of the frame. Several seed boxes are fixedly connected to the side of the frame away from the traction frame. A hollow shaft is rotatably connected to the middle of the frame. Two avoidance grooves are opened on the side of each seed box near the traction frame. Hollow discs are fixedly connected to the hollow shaft at the positions of the avoidance grooves. The hollow discs are slidably connected to the avoidance grooves and are internally connected to the hollow shaft. Air extraction components for drawing negative pressure from the hollow shaft are provided on both sides of the frame. A seed metering component that cooperates with the hollow discs to deliver seeds into the soil is provided at the lower end of the frame. A rotating component for driving the hollow shaft to rotate is also provided on the frame.

[0008] As a further embodiment of this utility model: the air extraction assembly includes a negative pressure fan fixed on both sides of the frame, and a rotary joint is provided at both ends of the hollow shaft. The interface at one end of the rotary joint is connected to the hollow shaft, and the interface at the other end of the rotary joint is connected to the air extraction end of the negative pressure fan.

[0009] As a further embodiment of this utility model: the seed metering component includes a seed metering box, which is located below the hollow disc. The hollow disc is fixedly connected to the bottom crossbar of the machine frame. The seed metering box has two seeding slots, and a seeding tube is fixedly connected to the lower end of each seeding slot. The bottom of the seeding tube is provided with a seeding foot. A seed-scraping rod for scraping seeds off is provided at the position of the seeding slot below the hollow disc. Several furrowing components are provided on the side of the machine frame near the traction frame, and a soil covering component is provided on the side of the machine frame away from the traction frame.

[0010] As a further embodiment of this utility model: the trenching component includes several vertical arms, each of which is fixedly connected to the side of the frame near the traction frame. The vertical arms correspond to the positions of the seed metering box, and each vertical arm is fixedly connected to a soil-breaking trencher at its lower end.

[0011] As a further embodiment of this utility model: the soil covering component includes a reinforcing frame, which is fixedly connected to the bottom crossbeam of the machine frame. One end of the reinforcing frame is fixedly connected to the vertical arm, and the other end of the reinforcing frame is fixedly connected to a U-shaped fork. Both ends of the U-shaped fork are rotatably connected to a soil covering disc.

[0012] As a further embodiment of this utility model: the rotating component includes a wheel axle, the wheel axle is rotatably connected to the bottom of the end of the frame away from the traction frame, field wheels are fixedly connected to both ends of the wheel axle, and a transmission component is provided between the wheel axle and the hollow shaft.

[0013] As a further embodiment of this utility model: the transmission assembly includes sprockets, which are fixedly connected to the axle and the hollow shaft respectively, and a chain is installed between the sprockets on the axle and the hollow shaft.

[0014] As a further improvement of this utility model, hooks are fixedly connected to the middle of the seed box near the hollow disc.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention features two identical hollow discs on each seed box, which are driven coaxially. This allows for simultaneous adsorption of corn seeds during sowing, and the seeds are released together when the box rotates to the seed metering box. Guided by the sowing tube, the seeds fall into the soil, ensuring that the spacing between the two seeds is within the required range, achieving the requirement of simultaneous sowing of two seeds. Furthermore, the two hollow discs are independently designed, with each disc's suction hole adsorbing only one seed at a time, ensuring precise seed metering and avoiding the problems of inaccurate seed metering and feeding jams found in existing technologies. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure on the other side of this utility model.

[0018] Figure 3 This is a partial structural schematic diagram of the present invention.

[0019] Figure 4 This is a schematic diagram of the bottom structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the internal structure of the seed trough in this utility model.

[0021] The components include: 1. Frame; 2. Traction frame; 3. Hollow disc; 4. Hollow shaft; 5. Seed box; 6. Field wheel; 7. Negative pressure fan; 8. Covering disc; 9. Seeding tube; 10. Soil breaker / furrow opener; 11. Axle; 12. Chain; 13. Sprocket; 14. Rotary joint; 15. Seed metering box; 16. Seed suction hole; 17. Hook frame; 18. Vertical arm; 19. Seed trough; 20. Seed release rod; 21. Seeding base; 22. Reinforcing frame; 23. U-shaped fork frame. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 In this embodiment of the utility model, a double-disc synchronous seed metering device for corn includes a frame 1. A traction frame 2 is fixedly connected to the middle of one end of the frame 1. The traction frame 2 can be connected to a tractor during application to facilitate tractor towing.

[0024] Please see Figures 1-3 A number of seed boxes 5 are fixedly connected to the side of the frame 1 away from the traction frame 2. A hollow shaft 4 is rotatably connected in the middle of the frame 1. Two avoidance grooves are opened on the side of the seed box 5 near the traction frame 2. A hollow disc 3 is fixedly connected to the hollow shaft 4 in the avoidance groove. The hollow disc 3 is slidably connected to the avoidance groove. The hollow disc 3 is internally connected to the hollow shaft 4. A hook frame 17 is fixedly connected to the middle of the seed box 5 near the hollow disc 3. When working, the rotation of the hollow shaft 4 drives the coaxial hollow disc 3 to rotate synchronously. When the seed suction hole 16 on the hollow disc 3 passes through the seed box 5, it will absorb a corn seed. At the same time, the hook 17 on the seed box 5 will slightly move the seeds adsorbed on the seed suction hole 16. Since the hollow shaft 4 and the hollow disk 3 are in a negative pressure state, the adsorbed seeds can be stably attached to the seed suction hole 16 and will not fall off. If the seed suction hole 16 adsorbs more seeds, the excess seeds will be blocked by the hook 17 or moved out of the adsorption range of the seed suction hole 16, thus ensuring that the seed suction hole 16 adsorbs only one seed at a time.

[0025] Please see Figure 1 and Figure 2 The frame 1 has suction assemblies on both sides for drawing negative pressure from the hollow shaft 4. The suction assemblies include negative pressure fans 7 fixed on both sides of the frame 1. Both ends of the hollow shaft 4 are provided with rotary joints 14. One end of the rotary joint 14 is connected to the hollow shaft 4, and the other end of the rotary joint 14 is connected to the suction end of the negative pressure fan 7. When working, the negative pressure fan 7 will draw air from the inside of the hollow shaft 4, so that the hollow shaft 4 and the hollow disc 3 are in a negative pressure state, thereby continuously generating suction at the seed suction hole 16. The rotary joints 14 can connect the rotating hollow shaft 4 to the suction end of the negative pressure fan 7.

[0026] Please see Figures 3-5The lower end of the frame 1 is provided with a seed metering component that works with the hollow disc 3 to deliver seeds into the soil. The seed metering component includes a seed metering box 15, which is located below the hollow disc 3. The hollow disc 3 is fixedly connected to the bottom crossbar of the frame 1. The seed metering box 15 is provided with two seeding slots 19. The lower end of each seeding slot 19 is fixedly connected to a sowing tube 9. The bottom of the sowing tube 9 is provided with a sowing foot 21. The seeding slot 19 is located below the hollow disc 3 and is provided with a seed-scraping rod 20 for scraping the seeds off. After the seed suction hole 16 that adsorbs the seeds moves into the seed metering box 15, the corn seeds adsorbed on the seed suction hole 16 will be scraped off by the seed-scraping rod 20 inside the seed metering box 15. At this time, the corn seeds are sown into the soil under the guidance of the sowing tube 9.

[0027] Please see Figure 1 The frame 1 is provided with several furrowing components on the side near the traction frame 2. Each furrowing component includes several vertical arms 18. The vertical arms 18 are fixedly connected to the side of the frame 1 near the traction frame 2. The vertical arms 18 are positioned corresponding to the seed metering box 15. The lower end of each vertical arm 18 is fixedly connected to a soil breaking furrow opener 10. The soil breaking furrow opener 10 can be used to break the soil and make furrows during sowing, and at the same time, it works with the sowing tube 9 and the sowing foot 21 to sow the seeds.

[0028] Please see Figure 2 and Figure 5 The frame 1 is also provided with a soil covering component on the side away from the traction frame 2. The soil covering component includes a reinforcing frame 22, which is fixedly connected to the bottom crossbar of the frame 1. One end of the reinforcing frame 22 is fixedly connected to the vertical arm 18, and the other end of the reinforcing frame 22 is fixedly connected to a U-shaped fork 23. Both ends of the U-shaped fork 23 are inclined and rotatably connected to a soil covering disc 8. The U-shaped fork 23 can keep the soil covering disc 8 on both sides of the trench opened by the soil breaking and trenching device 10. When the frame 1 is moved by the tractor, the inclined soil covering disc 8 will push the soil on both sides of the trench into the trench to achieve soil covering.

[0029] Please see Figure 2 The frame 1 is also equipped with a rotating assembly for driving the hollow shaft 4 to rotate. The rotating assembly includes an axle 11, which is rotatably connected to the bottom of the frame 1 at the end away from the traction frame 2. Field wheels 6 are fixedly connected to both ends of the axle 11. A transmission assembly is provided between the axle 11 and the hollow shaft 4. The transmission assembly includes a sprocket 13, which is fixedly connected to the axle 11 and the hollow shaft 4 respectively. A chain 12 is installed between the sprocket 13 on the axle 11 and the hollow shaft 4. When the frame 1 is towed by a tractor, the field wheels 6 roll on the ground and rotate. The rotation of the field wheels 6 causes the axle 11 to rotate, which drives the sprocket 13 and the chain 12 to rotate, thereby driving the hollow shaft 4 to rotate.

[0030] The working principle of this utility model is as follows: First, the tractor is connected to the tractor through the traction frame 2, and the tractor provides the traction power. When the tractor pulls the frame 1, the field wheel 6 rotates synchronously due to rolling the ground, which drives the wheel axle 11 fixed to it to rotate. The two sprockets 13 are transmitted through the chain 12, which transmits the rotation power of the field wheel 6 to the hollow shaft 4, so that the hollow shaft 4 obtains continuous rotation power. At the same time, when the frame 1 moves, the soil breaking and furrowing device 10 breaks the soil in advance to form a furrow for accommodating seeds, which prepares for the subsequent seeds to fall in. When sowing, the negative pressure fan 7 fixed on both sides of the frame 1 is started. The negative pressure fan 7 draws air to form a negative pressure inside the hollow shaft 4. Since the hollow shaft 4 is connected to the hollow disc 3 that is slidably connected in the seed box 5, the hollow disc 3 forms a negative pressure synchronously. When the hollow shaft 4 rotates, it drives the coaxially fixed hollow disk 3 to rotate synchronously. When the seed suction hole 16 on the hollow disk 3 passes through the seed box 5, it absorbs one corn seed. The hollow disk 3, which absorbs the seed, continues to rotate. When the seed suction hole 16 carrying the seed moves to the inside of the seed metering box 15 below the hollow disk 3, the seed-dispensing rod 20 will scrape the seed off the seed suction hole 16. The scraped seed falls into the two seed-dropping grooves 19 inside the seed metering box 15 and is guided along the seeding tube 9 fixed at the lower end of the seed-dropping groove 19. Finally, it is delivered into the soil through the seeding foot 21 at the bottom of the seeding tube 9. As the frame 1 moves, the inclined soil covering plate 8 pushes the soil on both sides of the groove into the groove, realizing the soil covering of the fallen seed and completing the entire sowing process.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Although this specification describes embodiments, not every embodiment contains only one technical solution. This method of description is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dual-disc synchronous seed metering device for double-kernel corn, comprising a frame (1), characterized in that: A traction frame (2) is fixedly connected to one end of the frame (1). Several seed boxes (5) are fixedly connected to the side of the frame (1) away from the traction frame (2). A hollow shaft (4) is rotatably connected to the middle of the frame (1). Two avoidance grooves are opened on the side of the seed box (5) close to the traction frame (2). Hollow discs (3) are fixedly connected to the hollow shaft (4) in the avoidance grooves. The hollow discs (3) are slidably connected to the avoidance grooves. The hollow discs (3) are internally connected to the hollow shaft (4). Air extraction components for drawing negative pressure from the hollow shaft (4) are provided on both sides of the frame (1). A seed metering component that cooperates with the hollow discs (3) to send seeds into the soil is provided at the lower end of the frame (1). A rotating component for driving the hollow shaft (4) to rotate is also provided on the frame (1).

2. The dual-disc synchronous seed metering device for double-grain corn as described in claim 1, characterized in that, The air extraction assembly includes a negative pressure fan (7) fixed on both sides of the frame (1). Both ends of the hollow shaft (4) are provided with a rotary joint (14). One end of the rotary joint (14) is connected to the hollow shaft (4), and the other end of the rotary joint (14) is connected to the air extraction end of the negative pressure fan (7).

3. The dual-disc synchronous seed metering device for double-grain corn as described in claim 1, characterized in that, The seed metering assembly includes a seed metering box (15), which is located below the hollow disc (3). The hollow disc (3) is fixedly connected to the bottom crossbar of the frame (1). The seed metering box (15) has two seed troughs (19). The lower end of each seed trough (19) is fixedly connected to a seeding tube (9). The bottom of the seeding tube (9) is provided with a seeding foot (21). The seed trough (19) located below the hollow disc (3) is provided with a seed-scraping rod (20) for scraping the seeds off. The side of the frame (1) near the traction frame (2) is provided with several ditching components. The side of the frame (1) away from the traction frame (2) is also provided with a soil covering component.

4. A dual-disc synchronous seed metering device for double-grain corn as described in claim 3, characterized in that, The trenching assembly includes several vertical arms (18), which are fixedly connected to the side of the frame (1) near the traction frame (2). The vertical arms (18) correspond to the seed box (15), and the lower end of each vertical arm (18) is fixedly connected to a soil-breaking trencher (10).

5. A dual-disc synchronous seed metering device for double-grain corn as described in claim 3, characterized in that, The soil covering assembly includes a reinforcing frame (22), which is fixedly connected to the bottom crossbar of the frame (1). One end of the reinforcing frame (22) is fixedly connected to the vertical arm (18), and the other end of the reinforcing frame (22) is fixedly connected to a U-shaped fork (23). Both ends of the U-shaped fork (23) are inclined and rotatably connected to a soil covering plate (8).

6. A dual-disc synchronous seed metering device for double-grain corn as described in claim 1, characterized in that, The rotating assembly includes a wheel axle (11), which is rotatably connected to the bottom of the end of the frame (1) away from the traction frame (2). Both ends of the wheel axle (11) are fixedly connected to field wheels (6), and a transmission assembly is provided between the wheel axle (11) and the hollow shaft (4).

7. A dual-disc synchronous seed metering device for double-grain corn as described in claim 6, characterized in that, The transmission assembly includes a sprocket (13), which is fixedly connected to the axle (11) and the hollow shaft (4) respectively. A chain (12) is installed between the sprocket (13) on the axle (11) and the hollow shaft (4).

8. A dual-disc synchronous seed metering device for double-grain corn as described in claim 1, characterized in that, The seed box (5) is fixedly connected to a hook frame (17) in the middle near the hollow plate (3).

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