Precise seed-metering device for corn breeding test

Abstract

The invention provides a precise seed-metering device for a corn breeding test, which comprises a rack, a storage tank with an opening at the upper end is arranged on the rack, and the lower part of the rack is a seed-metering part with one side inclined downwards. The rack is provided with a driving wheel on one side of the seed metering part and is internally provided with a driving motor; a telescopic motor is arranged at the inclined upward end of the seed-metering part, a telescopic hole and a seed outlet sliding hole are respectively formed in the upper end and the lower end of the seed-metering part, a plurality of seed-metering sliding strips are connected to the inner bottom of the seed-metering part in a sliding manner, and seed carrying holes are formed in the seed-metering sliding strips. A positioning plate is arranged between the telescopic motor outside the storage tank and the seed metering part, a power output shaft of the telescopic motor is connected with a driving sliding strip, the free end of the driving sliding strip is connected with a push-pull connecting plate, the free end of the middle seed metering sliding strip is connected with the push-pull connecting plate, and the other seed metering sliding strips extend out of one ends of the telescopic holes and are provided with connecting sliding strips; the push-pull connecting plate is provided with a plurality of limiting sliding holes which are in sliding connection with the connecting sliding strips, and the free ends of the connecting sliding strips are detachably connected with the positioning plate and the push-pull connecting plate. The seed metering device can quickly adjust the seed metering quantity and improve the breeding operation efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of agricultural equipment, and relates to a precision seed sowing device for corn breeding test. BACKGROUND

[0002] In corn breeding test, the precision of sowing is extremely high to ensure the accuracy and repeatability of test data. Unlike the pursuit of efficiency and coverage in field production, breeding test often involves multiple plots, different varieties or different treatment combinations, and the number of seeds required for each plot is usually small and needs to be strictly controlled, such as single seed, double seed or specific number of precision sowing. Therefore, as a key component to achieve precision sowing, the precision seed sowing device plays a crucial role in corn breeding test equipment.

[0003] At present, the common precision seed sowing device on the market mainly adopts mechanical structure, such as eye wheel type, air suction type or needle type seed sowing mechanism. Among them, the eye wheel type is widely used in small and medium-sized breeding seeding equipment due to its simple structure and low cost. This kind of seed sowing device usually realizes quantitative seed taking by setting fixed size and number of holes (eye) on the seed sowing disc, and a fixed number of seeds are discharged per revolution. However, the existing seed sowing device is usually optimized for a specific seed sowing number in design. Once the breeding test demand changes (such as from single seed sowing to three or five seed sowing), the user often cannot directly change the seed sowing number by adjusting the mechanism, but must replace the seed sowing disc with corresponding hole configuration. This process is not only tedious and time-consuming, but also easy to cause equipment wear or positioning deviation due to frequent disassembly and assembly, thereby affecting the sowing precision and test consistency. SUMMARY

[0004] The purpose of the present application is to provide a precision seed sowing device for corn breeding test, which adopts a new seed sowing structure design and can quickly adjust the seed sowing number, thereby improving the breeding operation efficiency.

[0005] To solve the above technical problems, the present application provides a precision seed sowing device for corn breeding test, which comprises a rack, an upper opening storage tank is arranged on the rack, the lower part of the storage tank is a seed sowing part with one side inclined downward, a drive wheel is installed on one side of the seed sowing part, a drive motor is installed in the rack to drive the rotation of the drive wheel; A telescopic motor is installed at the upward-sloping end of the seed metering section, and a telescopic hole is provided at the bottom of the seed metering section near the telescopic motor. A seed outlet sliding hole that cooperates with the telescopic hole is provided at the downward-sloping end of the seed metering section. Multiple seed metering slides are slidably connected at the bottom of the seed metering section, and both ends can extend from the telescopic hole and the seed outlet sliding hole respectively. A seed carrying hole is provided through each seed metering slide near the seed outlet sliding hole. A seed pressing wheel is rotatably connected above the seed metering slides in the seed metering section. A positioning plate is provided on the outer side of the storage tank between the telescopic motor and the seed metering part. A through sliding hole is provided in the middle of the positioning plate. The power output shaft of the telescopic motor is connected to a drive slide bar extending from the through sliding hole. The free end of the drive slide bar is connected to a push-pull connecting plate located between the positioning plate and the seed metering part. The free end of the middle seed metering slide bar is connected to the push-pull connecting plate. Except for the middle seed metering slide bar, each of the other seed metering slide bars has a connecting slide bar with a smaller inner diameter at one end extending from the telescopic hole. The push-pull connecting plate has multiple limiting sliding holes that are slidably connected to each connecting slide bar. The free end of each connecting slide bar is detachably connected to the positioning plate and the push-pull connecting plate.

[0006] By adopting the above technical solution, when corn breeding seed metering operations are required, the staff holds the handrail and pushes the seed metering device forward. The drive motor starts and drives the drive wheel to rotate through the drive shaft. The rotating seed pressing wheel presses the corn seeds in the storage tank into the seed carrying hole on the seed metering slide. Since the size of the seed carrying hole is just enough to fit only one corn kernel, precise seed extraction is achieved.

[0007] To increase the number of seeds, separate the seed-dispensing slider that needs to participate in seeding from the positioning plate, and then connect it to the push-pull connecting plate. In this way, the seed-dispensing slider can extend out from the bottom of the seed-dispensing part along with the push-pull connecting plate, and the seed-carrying hole on it can carry out the seeds for seeding. To reduce the number of seeds, separate the threaded connector corresponding to the seed-dispensing slider from the push-pull connecting plate, and then thread it to the threaded hole on the positioning plate, so that the position of the seed-dispensing slider is fixed and it no longer participates in seeding.

[0008] The present invention is further configured such that an electrical control box is provided at one end of the storage tank of the frame, and a battery and an integrated circuit board are provided inside the electrical control box, and the drive motor and the telescopic motor are both electrically connected to the integrated circuit board.

[0009] The present invention is further configured such that the power output shaft of the drive motor is connected to the middle part of the drive wheel through a drive shaft, a drive pulley is provided on the drive shaft, one end of the seed pressing wheel extends out of the seed dispensing part and is provided with a transmission pulley that cooperates with the drive pulley, and the drive pulley and the transmission pulley are driven by a belt.

[0010] The present invention is further configured such that an encoder for detecting the rotational speed of the drive shaft is mounted on the frame.

[0011] The present invention is further configured such that the outer periphery of the pressing wheel is provided with a plurality of pressing strips distributed in a circular pattern.

[0012] The present invention is further configured such that, except for the connecting slide bar located in the middle, the free ends of the other connecting slide bars are rotatably connected to threaded connectors, the positioning plate has a plurality of threaded holes that are threadedly connected to the threaded connectors one by one, and the push-pull connecting plate has a plurality of threaded sleeves that are threadedly connected to the threaded connectors one by one on the side near the positioning plate.

[0013] The present invention is further configured such that each connecting slide bar has a T-shaped connecting shaft at its free end, and each threaded connector has a T-shaped rotating hole that is rotatably connected to the corresponding T-shaped connecting shaft.

[0014] The present invention is further configured such that the middle part of each threaded connector is a knob section without threads, and the thread directions of each threaded connector at both ends of the corresponding knob section are opposite.

[0015] The present invention is further configured such that handrails are provided on both the left and right sides of the storage tank of the frame.

[0016] The present invention is further configured such that a furrow shovel located below and in front of the seed outlet sliding hole is connected to the frame, and a soil covering shovel located below and behind the seed outlet sliding hole is connected to the frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Firstly, the precision seed metering device of this invention achieves flexible adjustment of the seed metering quantity through an adjustable seed metering slider design. In actual breeding experiments, different experimental needs often involve different seed numbers. Traditional seed metering devices require changing the seed metering disc to meet this requirement, which is cumbersome and prone to errors. However, the seed metering device of this invention can quickly change the number of seed metering sliders involved in seed metering through simple connection or separation operations, thereby adapting to different seed number requirements and greatly improving the efficiency and flexibility of breeding operations.

[0019] Secondly, the precision seed metering device of this invention is also equipped with a furrow shovel and a covering shovel, realizing integrated sowing and covering operations. The furrow shovel can automatically open suitable sowing furrows before sowing, while the covering shovel can quickly cover the seeds with soil after sowing, protecting the seeds from external environmental interference and improving seed survival rate. This design not only simplifies the sowing process but also improves sowing efficiency and quality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 Used to demonstrate the structure at the bottom of the seed metering section; Figure 3 It is a partial cross-sectional view used to show the telescopic holes and seed outlet sliding holes at the seed metering section; Figure 4 This is a partial sectional view used to show the connection between the drive pulley and the transmission pulley; Figure 5 Primarily used to display the batteries inside the electrical control box; Figure 6 This is used to demonstrate the connection between the seed metering slide and the push-pull connecting plate.

[0021] The components include: 1. Frame; 2. Storage trough; 3. Seed metering section; 4. Handrail; 5. Drive wheel; 6. Drive motor; 7. Encoder; 8. Telescopic motor; 9. Telescopic hole; 10. Seed dispensing slide hole; 11. Seed metering slide bar; 12. Seed carrying hole; 13. Seed pressing wheel; 14. Pressing bar; 15. Drive pulley; 16. Transmission pulley; 17. Belt; 18. Positioning plate; 19. Through slide hole; 20. Drive slide bar; 21. Push-pull connecting plate; 22. Connecting slide bar; 23. Limiting slide hole; 24. T-shaped connecting shaft; 25. Threaded connector; 26. Knob section; 27. Threaded hole; 28. Threaded connecting sleeve; 29. ​​Furrow shovel; 30. Covering shovel; 31. Electrical control box; 32. Battery. Detailed Implementation

[0022] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a more detailed account of a precision seed metering device for maize breeding experiments proposed in this invention. The advantages and features of the invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise scales, used only to facilitate and clarify the illustration of the embodiments of the invention. The same or similar reference numerals in the drawings represent the same or similar parts.

[0023] Example, refer to Figures 1-6 A precision seed metering device for maize breeding experiments includes a frame 1. A storage trough 2 with an open top is mounted on the frame 1. The lower part of the storage trough 2 is a seed metering section 3 that slopes downwards on one side. A handrail 4 is provided on both the left and right sides of the storage trough 2 on the frame 1 to facilitate manual pushing of the seed metering device for seed metering. A drive wheel 5 is mounted on one side of the seed metering section 3 on the frame 1. A drive motor 6 is installed inside the frame 1 to drive the drive wheel 5. The power output shaft of the drive motor 6 is connected to the middle of the drive wheel 5 via a drive shaft. An encoder 7 is mounted on the frame 1 to detect the rotational speed of the drive shaft, so as to automatically adjust the seeding spacing according to the travel speed.

[0024] A telescopic motor 8 is installed at the upward-sloping end of the seed metering section 3, and a telescopic hole 9 is opened at the bottom of the seed metering section 3 near the telescopic motor 8. A seed outlet sliding hole 10 that cooperates with the telescopic hole 9 is opened at the downward-sloping end of the seed metering section 3. Five seed metering slide strips 11 are slidably connected at the bottom of the seed metering section 3, and both ends can extend from the telescopic hole 9 and the seed outlet sliding hole 10 respectively. A seed carrying hole 12 is opened through each row of seed slide strips 11 near the seed outlet sliding hole 10. The size of the seed carrying hole 12 is just enough to fit only one kernel of corn.

[0025] A seed pressing wheel 13 is rotatably connected above the seed pressing slide 11 inside the seed metering section 3. Multiple circumferentially distributed pressing strips 14 are provided on the outer periphery of the seed pressing wheel 13. When rotating, the pressing strips 14 drive the corn seeds to be pressed into the seed carrying hole 12. A drive pulley 15 is provided on the drive shaft. One end of the seed pressing wheel 13 extends out of the seed metering section 3 and is provided with a transmission pulley 16 that cooperates with the drive pulley 15. The outer diameter of the transmission pulley 16 is much smaller than the outer diameter of the drive pulley 15. The drive pulley 15 and the transmission pulley 16 are driven by a belt 17. Thus, during the movement, the driving wheel 5 drives the seed pressing wheel 13 to rotate.

[0026] A positioning plate 18 is provided on the outer side of the storage tank 2 between the telescopic motor 8 and the seed metering part 3. A through sliding hole 19 is provided in the middle of the positioning plate 18. A drive slide 20 extending from the through sliding hole 19 is connected to the power output shaft of the telescopic motor 8. A push-pull connecting plate 21 located between the positioning plate 18 and the seed metering part 3 is connected to the free end of the drive slide 20. The seed metering slide 11 located in the middle is connected to the push-pull connecting plate 21. Except for the seed metering slide 11 in the middle, each of the other seed metering slides 11 is provided with a connecting slide 22 with a smaller inner diameter at one end extending out of the telescopic hole 9. Four limiting sliding holes 23 are provided through the push-pull connecting plate 21 and are slidably connected to each connecting slide 22.

[0027] Each connecting slide 22 has a T-shaped connecting shaft 24 at its free end, and each T-shaped connecting shaft 24 is rotatably connected to a threaded connector 25 at its free end. Each threaded connector 25 has a T-shaped rotating hole that rotatably connects to the corresponding T-shaped connecting shaft 24. The middle part of each threaded connector 25 has a knob section 26 without threads at one end, and the thread directions at both ends of the corresponding knob section 26 of each threaded connector 25 are opposite. The positioning plate 18 has four threaded holes 27 that are threadedly connected to the threaded connectors 25 one by one. When the threaded connectors 25 are connected to the positioning plate 18, the position of this seeding slide 11 is fixed. The push-pull connecting plate 21 has four threaded sleeves 28 that are threadedly connected to the threaded connectors 25 one by one on the side near the positioning plate 18. When the threaded connectors 25 are connected to the push-pull connecting plate 21, this seeding slide 11 can freely extend and retract at the bottom of the seeding section 3 with the push-pull connecting plate 21 to carry out the seeds for seeding.

[0028] The frame 1 is connected downward to a furrow shovel 29 located below and in front of the seed outlet 10, which is used to open a seed outlet furrow in front for seed outlet. The frame 1 is also connected downward to a soil covering shovel 30 located below and behind the seed outlet 10. The soil covering shovel 30 is used to scrape the surrounding soil into the seed outlet furrow to cover the seeds.

[0029] An electrical control box 31 is installed at one end of the storage tank 2 on the frame 1. Inside the electrical control box 31, there is a battery 32 and an integrated circuit board (not shown). The drive motor 6, encoder 7 and telescopic motor 8 are all electrically connected to the integrated circuit board.

[0030] Working principle: When corn seed metering is required, the operator holds the handle 4 and pushes the seed metering device forward. The drive motor 6 starts, driving the drive wheel 5 to rotate via the drive shaft. Simultaneously, the drive pulley 15 on the drive shaft drives the transmission pulley 16 via the belt 17, which in turn rotates the seed pressing wheel 13. The pressing strips 14 on the outer circumference of the seed pressing wheel 13 press the corn seeds in the storage trough 2 into the seed carrying hole 12 on the seed metering slide 11. Since the seed carrying hole 12 is just the right size to hold only one corn kernel, precise seed removal is achieved. At the same time, the encoder 7 detects the rotation speed of the drive shaft in real time and transmits the signal to the integrated circuit board. The integrated circuit board automatically adjusts the rotation speed of the drive motor 6 according to the travel speed to ensure the uniformity of the seeding spacing.

[0031] To increase the number of seeds to be sown, the threaded connector 25 corresponding to the sowing slide 11 that needs to participate in sowing is separated from the positioning plate 18, and then threadedly connected to the threaded sleeve on the push-pull connecting plate 21. In this way, the sowing slide 11 can extend out from the bottom of the sowing section 3 along with the push-pull connecting plate 21, and the seed carrying hole 12 on it can carry out the seeds for sowing. To reduce the number of seeds to be sown, the threaded connector 25 corresponding to the sowing slide 11 is separated from the push-pull connecting plate 21, and then threadedly connected to the threaded hole 27 on the positioning plate 18, so that the position of the sowing slide 11 is fixed and it no longer participates in sowing.

[0032] As the seed metering device moves forward, the furrow shovel 29 located below and in front of the seed outlet 10 opens a seed metering groove. The seeds in the seed carrying hole 12 fall into the seed metering groove when the seed metering slide 11 extends to the seed outlet 10. Then, the soil covering shovel 30 located below and behind the seed outlet 10 scrapes the surrounding soil into the seed metering groove to cover the seeds, thus completing the entire seed metering process.

[0033] It should also be noted that all terms such as "set up" and similar descriptive words in this application (especially the specification) indicate that two structures have or exist a connection relationship. However, the specific means by which the two are connected are not limited in detail, and are usually conventional connection methods. That is, the means should be understood as prior art and do not need to be elaborated. For example, "m is set up with n" only indicates that structure m has structure n, and whether the two are connected by welding, riveting, adhesive, or integral molding is within the scope of protection of this application. Similarly, "x is rotatably set up with y" only indicates that y and x can rotate relative to each other, and whether the two are connected by a bearing, or whether y directly passes through x and is rotatably connected to x, or other feasible methods, are all within the scope of protection of this application.

[0034] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A precision seed metering device for maize breeding experiments, comprising a frame (1), wherein the frame (1) is provided with a storage trough (2) with an open top, characterized in that, The lower part of the storage tank (2) is a seed dispensing section (3) that slopes downwards on one side. The frame (1) is equipped with a drive wheel (5) on one side of the seed dispensing section (3). The frame (1) is equipped with a drive motor (6) for driving the drive wheel (5) to rotate. A telescopic motor (8) is installed at the upward tilting end of the seed metering part (3) along its tilting direction. A telescopic hole (9) is provided at the bottom of the seed metering part (3) near the telescopic motor (8). A seed outlet sliding hole (10) that cooperates with the telescopic hole (9) is provided at the downward tilting end of the seed metering part (3). Multiple seed metering slides (11) are slidably connected at the bottom of the seed metering part (3) and are arranged side by side. Both ends can extend from the telescopic hole (9) and the seed outlet sliding hole (10) respectively. A seed carrying hole (12) is provided at the point near the seed outlet sliding hole (10) of each seed metering slide (11). A seed pressing wheel (13) is rotatably connected above the seed metering slides (11) in the seed metering part (3). A positioning plate (18) is provided on the outer side of the storage tank (2) between the telescopic motor (8) and the seed metering part (3). A through sliding hole (19) is provided in the middle of the positioning plate (18). The power output shaft of the telescopic motor (8) is connected to a drive slide bar (20) extending from the through sliding hole (19). The free end of the drive slide bar (20) is connected to a push-pull connecting plate (21) located between the positioning plate (18) and the seed metering part (3). The seed metering slide bar in the middle The free end of (11) is connected to the push-pull connecting plate (21). Except for the middle seeding slide (11), each of the other seeding slides (11) is provided with a connecting slide (22) with a smaller inner diameter at one end extending out of the telescopic hole (9). The push-pull connecting plate (21) is provided with a plurality of limiting slide holes (23) that are slidably connected to each connecting slide (22). The free end of each connecting slide (22) is detachably connected to the positioning plate (18) and the push-pull connecting plate (21).

2. The precision seed metering device for maize breeding experiments according to claim 1, characterized in that, The frame (1) is provided with an electrical control box (31) at one end of the storage tank (2). The electrical control box (31) is provided with a battery (32) and an integrated circuit board. The drive motor (6) and the telescopic motor (8) are both electrically connected to the integrated circuit board.

3. A precision seed metering device for maize breeding experiments according to claim 1, characterized in that, The power output shaft of the drive motor (6) is connected to the middle of the drive wheel (5) through the drive shaft. A drive pulley (15) is provided on the drive shaft. One end of the seed pressing wheel (13) extends out of the seed dispensing part (3) and is provided with a transmission pulley (16) that cooperates with the drive pulley (15). The drive pulley (15) and the transmission pulley (16) are driven by a belt (17).

4. A precision seed metering device for maize breeding experiments according to claim 1, characterized in that, An encoder (7) for detecting the rotational speed of the drive shaft is mounted on the frame (1).

5. A precision seed metering device for maize breeding experiments according to claim 1, characterized in that, The outer periphery of the seed pressing wheel (13) is provided with multiple pressing strips (14) arranged in a circular pattern.

6. A precision seed metering device for maize breeding experiments according to claim 1, characterized in that, Except for the connecting slide (22) located in the middle, the free ends of the other connecting slides (22) are rotatably connected to threaded connectors (25). The positioning plate (18) has multiple threaded holes (27) that are threadedly connected to the threaded connectors (25) one by one. The push-pull connecting plate (21) is provided with multiple threaded sleeves (28) that are threadedly connected to the threaded connectors (25) one by one on the side close to the positioning plate (18).

7. A precision seed metering device for maize breeding experiments according to claim 6, characterized in that, Each connecting slide bar (22) has a T-shaped connecting shaft (24) at its free end, and each threaded connector (25) has a T-shaped rotating hole that is rotatably connected to the corresponding T-shaped connecting shaft (24).

8. A precision seed metering device for maize breeding experiments according to claim 6, characterized in that, The middle part of each threaded connector (25) is a knob section (26) without threads, and the thread directions of each threaded connector (25) at both ends of the corresponding knob section (26) are opposite.

9. A precision seed metering device for maize breeding experiments according to claim 1, characterized in that, The frame (1) is provided with handrails (4) on both the left and right sides of the storage tank (2).

10. A precision seed metering device for maize breeding experiments according to claim 1, characterized in that, The frame (1) is connected downward to a furrow shovel (29) located in front of and below the seed outlet sliding hole (10), and the frame (1) is connected downward to a soil covering shovel (30) located behind and below the seed outlet sliding hole (10).

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