Airflow disturbance based seed filling and guiding corn precision seed metering device

Abstract

The application relates to a guide-flow and set-row type corn precision seed sower based on airflow disturbance seed filling. The guide-flow and set-row type corn precision seed sower based on airflow disturbance seed filling comprises a seed sower shell, a seed tank, a seed suction mechanism, a seed sowing mechanism and a seed protection guide plate. The seed suction mechanism is rotationally installed in the seed sower shell, the seed tank is cooperatively installed on one side of the seed suction mechanism, the seed protection guide plate is installed in the seed sower shell and is located on the upside of the seed suction mechanism, the seed protection guide plate is used for ensuring that the adsorbed seeds cannot be affected by unknown factors and fall off, one end of the seed sowing mechanism is connected with the lower end of the seed protection guide plate, and the other end is located on the outside of the seed sower shell, the seed suction mechanism adsorbs the seeds in the seed tank and uniformly sows the seeds through the seed sowing mechanism. The application adopts an air closing device and a negative pressure air chamber, realizes uniform adsorption and discharge of the seeds, improves sowing uniformity, adopts airflow disturbance seed population and air blowing type seed filling, and can effectively reduce the seed damage rate.

Description

Technical Field

[0001] This application relates to the field of agricultural machinery technology, and in particular to a flow-guiding and sorting precision seed metering device for corn based on airflow disturbance seed filling. Background Technology

[0002] In related technologies, seed meters, as mechanized agricultural production equipment, are increasingly used in various field cultivation methods, such as large-scale field planting and small-scale scientific research sowing. In large-scale production sowing, due to their automation and high efficiency, they require less manpower and can achieve sowing goals faster than manual sowing, leading to their widespread application. However, for small-scale scientific research sowing, seed meters face many technical challenges in actual use, making it difficult to meet the actual needs of small-scale scientific research sowing and thus limiting their application effectiveness.

[0003] Existing seed metering devices suffer from problems such as uneven seeding and high seed loss during seed sowing. To solve these problems, this invention provides a flow-guiding and seed-filling precision seed metering device for corn based on airflow disturbance. Summary of the Invention

[0004] To address or partially address the problems existing in related technologies, this application provides a flow-guiding and discharging precision seed metering device for corn based on airflow disturbance, which can achieve uniform seed adsorption and discharge, thereby improving sowing uniformity.

[0005] This application provides a flow-guided, clustered, and precision seed metering device for corn based on airflow disturbance seed filling, including a seed metering device housing 0101, a seed box 0401, a seed suction mechanism, a seed metering mechanism, and a seed protection guide plate. The seed suction mechanism is rotatably installed inside the seed metering device housing 0101, and the seed box 0401 is fitted and installed on one side of the seed suction mechanism. The seed protection guide plate is installed inside the seed metering device housing 0101 and is located above the seed suction mechanism to ensure that the adsorbed seeds will not fall off due to unknown factors. One end of the seed metering mechanism is connected to the lower end of the seed protection guide plate, and the other end is located outside the seed metering device housing 0101. The seed suction mechanism adsorbs the seeds in the seed box 0401 and then performs uniform seeding through the seed metering mechanism.

[0006] Optionally, in some embodiments, the seed metering device housing 0101 is provided with a seed metering device housing and a connection port 0102 for connecting the airlock, a seed guide pipe port 0103 for installing the seed metering mechanism, a negative pressure air chamber port 0104 for installing the seed suction mechanism, and a seed box fixing shaft port 0105 for fixing the seed box 0401.

[0007] Optionally, in some embodiments, the seed suction mechanism includes a seed dispensing roller 0201, on which seed suction ports 0205 are evenly arrayed. Negative pressure chambers 0202 are provided at both ends of the seed dispensing roller 0201. The negative pressure chambers 0202 are rotatably installed at the negative pressure chamber inlets 0104. The negative pressure chambers 0202 and the seed dispensing roller 0201 are connected to a drive mechanism via a seed dispensing roller drive shaft 0203 to drive rotation. One end of the negative pressure chamber 0202 away from the seed dispensing roller 0201 has a negative pressure airflow outlet 0204 connected to a negative pressure fan, and the other end has a negative pressure airflow inlet 0206 connected to the seed dispensing roller 0201.

[0008] Optionally, in some embodiments, the seed metering device further includes a seed cleaning mechanism, which includes a seed cleaning wheel 0301. The seed cleaning wheel 0301 is rotatably mounted on the upper side of the seed metering roller 0201 via a seed cleaning wheel shaft 0302. Both ends of the seed cleaning wheel shaft 0302 pass through the seed guide tube opening 0103 and are mounted on the seed metering device housing 0101 via seed cleaning wheel shaft fasteners 0303. The position of the seed cleaning wheel 0301 corresponds to the position of each row of seed adsorption ports 0205 on the seed metering roller 0201, and is used to clean away the excess seeds adsorbed by the seed adsorption ports 0205, thereby ensuring the single-seed rate of sowing. The cleaned seeds will fall back into the seed box 0401 for subsequent adsorption.

[0009] Optionally, in some embodiments, the seed protection guide plate includes a semi-circular groove 0304 at the upper end and an arc-shaped guide groove 0305 at the lower end. The size of the semi-circular groove 0304 at the upper end corresponds to that of the seed cleaning wheel 0301, which can fix the position of the seed cleaning wheel 0301 on the seed cleaning wheel shaft 0302. The arc dimension of the arc-shaped guide groove 0305 at the lower end corresponds to and is slightly larger than that of the seed metering roller 0201, preventing mutual friction between the arc-shaped guide groove 0305 at the lower end of the seed protection guide plate and the seed metering roller 0201 and hindering the rotation of the seed metering roller 0201. The lower end of the arc-shaped guide groove 0305 at the lower end of the seed protection guide plate is connected to the seed metering mechanism.

[0010] Optionally, in some embodiments, the seed box 0401 has an opening on one side near the seed metering roller 0201 and is matched with the seed metering roller 0201 with a clearance smaller than the diameter of the seed. The bottom of the seed box 0401 is fixedly installed by a hollow seed box shaft 0402. Both ends of the hollow seed box shaft 0402 are fixed to the seed metering device housing 0101 by horseshoe-shaped seed box shaft fasteners 0403. One end of the hollow seed box shaft 0402 is connected to a positive pressure fan, and the other end is closed. The hollow seed box shaft 0402 is provided with ventilation holes that communicate with the seed box 0401.

[0011] Optionally, in some embodiments, the seed metering mechanism includes a seed metering mechanism ground wheel 0501, a ground wheel seed metering wheel axle 0502, a seed metering wheel 0503, a seed guide tube 0504, a seed dispensing tube 0505, and a flexible hose 0506. One end of the flexible hose 0506 is connected to the lower end of the arc-shaped guide groove 0305 at the lower end of the seed guide plate, and the other end of the flexible hose 0506 passes through the seed guide tube opening 0103 and is connected to the seed guide tube 0504. The other end of the seed guide tube 0504 is connected to the seed dispensing tube 0506. 505, the seed tube 0505 is fixed on the circumferential surface of the seed metering wheel 0503. The ground wheel 0501 of the seed metering mechanism is rotatably mounted on both sides of the seed metering wheel 0503 through the ground wheel seed metering wheel shaft 0502, and its radius is greater than the sum of the radius of the seed metering wheel 0503 and the diameter of the seed tube 0505, so as to ensure that the seed tube 0505 is not worn by the ground when the ground wheel 0501 of the seed metering mechanism moves. The ground wheel seed metering wheel shaft 0502 is connected to the seed metering roller drive shaft 0203 through the transmission mechanism.

[0012] The technical solution provided in this application may include the following beneficial effects:

[0013] This application has a simple structure and is easy to install and maintain;

[0014] This application uses an airlock and a negative pressure chamber to achieve uniform seed adsorption and discharge, thereby improving sowing uniformity. The use of airflow disturbance of the seed population and air blowing for seed filling can effectively reduce the seed damage rate.

[0015] The design of the seed guide plate and seed cleaning wheel in this application ensures the single-seed rate of sowing. The use of ground wheels and seed metering wheels enables the seed metering mechanism to move, improving work efficiency. The use of seals and bolts ensures the stability and safety of the seed metering device.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0018] Figure 1 This is a schematic diagram of the structure of a flow-guiding and sorting type precision seed metering device for corn based on airflow disturbance seed filling, as shown in the embodiments of this application;

[0019] Figure 2 This is a schematic diagram of the internal structure of a flow-guiding and sorting type precision corn seed metering device based on airflow disturbance seed filling, as shown in an embodiment of this application.

[0020] Figure 3This is an exploded view of a flow-guiding and sorting type precision corn seed metering device based on airflow disturbance seeding, as shown in an embodiment of this application.

[0021] Figure 4 This is a schematic diagram of the seed suction mechanism shown in the embodiments of this application;

[0022] Figure 5 This is a schematic diagram of the seed box structure shown in an embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the structure of the seed protection guide plate and the seed cleaning mechanism shown in the embodiments of this application;

[0024] Figure 7 This is a schematic diagram of the seeding mechanism shown in the embodiments of this application.

[0025] 0101-Seed metering device housing, 0102-Connection port between seed metering device housing and airlock, 0103-Seed guide pipe port, 0104-Negative pressure chamber port, 0105-Seed box fixing shaft port;

[0026] 0201-Seed metering roller, 0202-Negative pressure air chamber, 0203-Seed metering roller drive shaft, 0204-Negative pressure airflow outlet, 0205-Seed adsorption port, 0206-Negative pressure airflow inlet;

[0027] 0301-Seed cleaning wheel, 0302-Seed cleaning wheel shaft, 0303-Seed cleaning wheel shaft fastener, 0304-Upper semi-circular groove of seed protection guide plate, 0305-Lower arc-shaped guide groove of seed protection guide plate;

[0028] 0401-Seed box, 0402-Hollow seed box shaft, 0403-Horseshoe-shaped seed box shaft fastener;

[0029] 0501-Ground wheel of seed metering mechanism, 0502-Ground wheel seed metering wheel axle, 0503-Seed metering wheel, 0504-Seed guide tube, 0505-Seed feeding tube, 0506-Hose, 0507-U-shaped clamping component. Detailed Implementation

[0030] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0031] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] To address the aforementioned issues, this application provides a flow-guiding and discharging precision seed metering device for corn based on airflow disturbance, which can achieve uniform seed adsorption and discharge, thereby improving sowing uniformity.

[0035] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0036] See Figure 1-3The aforementioned airflow-driven precision seed metering device for corn includes a seed metering housing 0101, a seed box 0401, a seed suction mechanism, a seed metering mechanism, and a seed guarding guide plate. The seed suction mechanism is rotatably installed inside the seed metering housing 0101 and connected to a negative pressure fan. The seed box 0401 is fitted to one side of the seed suction mechanism and connected to a positive pressure fan. The seed guarding guide plate is installed inside the seed metering housing 0101 and is located above the seed suction mechanism to ensure that the adsorbed seeds will not fall due to unknown factors. One end of the seed metering mechanism is connected to the lower end of the seed guarding guide plate, and the other end is located outside the seed metering housing 0101. The seed suction mechanism adsorbs the seeds in the seed box 0401 and then performs uniform seed metering through the seed metering mechanism.

[0037] During operation, as the impeller shaft inside the airlock rotates, seeds continuously enter the seed metering device housing 0101 through the airlock and fall into the seed box 0401. This ensures that the positive pressure does not leak from the airlock. The high-speed rotation of the seed suction mechanism, along with the activation of the positive and negative pressure fans, fills the inside of the seed metering device housing 0101 with positive pressure, while some areas of the seed suction mechanism are filled with negative pressure. The pressure in the remaining areas is comparable to atmospheric pressure. The entire seed metering device housing 0101 is completely sealed. Seeds fall into the seed box 0401 through the airlock located above the seed metering device housing 0101. The working principle of the airlock is that when seeds enter the impeller-type airlock, the impeller rotates according to the properties of the material and the conveying requirements. During the rotation of the impeller, the material is evenly distributed on the blades, forming a stable material layer. The outlet inside the airlock housing is closed to prevent material leakage, while simultaneously ensuring that the positive pressure inside the seed metering device housing 0101 does not leak.

[0038] In some embodiments, the seed metering device housing 0101 is provided with a seed metering device housing and a connection port 0102 for connecting the airlock, a seed guide pipe port 0103 for installing the seed metering mechanism, a negative pressure air chamber port 0104 for installing the seed suction mechanism, and a seed box fixing shaft port 0105 for fixing the seed box 0401.

[0039] In some implementations, see Figure 4 The seed suction mechanism includes a seed metering roller 0201, on which seed suction ports 0205 are evenly arrayed. Negative pressure air chambers 0202 are provided at both ends of the seed metering roller 0201. The negative pressure air chambers 0202 are rotatably installed at the negative pressure air chamber inlets 0104. The negative pressure air chambers 0202 and the seed metering roller 0201 are connected to a drive mechanism through the seed metering roller drive shaft 0203 to drive the rotation. One end of the negative pressure air chamber 0202 away from the seed metering roller 0201 has a negative pressure airflow outlet 0204 connected to a negative pressure fan, and the other end has a negative pressure airflow inlet 0206 connected to the seed metering roller 0201.

[0040] In some implementations, see Figure 6 The seed metering device further includes a seed cleaning mechanism, which includes a seed cleaning wheel 0301. The seed cleaning wheel 0301 is rotatably mounted on the upper side of the seed metering roller 0201 via a seed cleaning wheel shaft 0302. Both ends of the seed cleaning wheel shaft 0302 pass through the seed guide tube opening 0103 and are mounted on the seed metering device housing 0101 via seed cleaning wheel shaft fasteners 0303. The position of the seed cleaning wheel 0301 corresponds to the position of each row of seed adsorption ports 0205 on the seed metering roller 0201, and is used to clean away excess seeds adsorbed by the seed adsorption ports 0205, thereby ensuring the single-seed rate of sowing. The cleaned seeds will fall back into the seed box 0401 for subsequent adsorption. The seed protection guide plate includes a semi-circular groove 0304 at the upper end and an arc-shaped guide groove 0305 at the lower end. The size of the semi-circular groove 0304 at the upper end corresponds to that of the seed cleaning wheel 0301, which can fix the position of the seed cleaning wheel 0301 on the seed cleaning wheel shaft 0302. The arc dimension of the arc-shaped guide groove 0305 at the lower end corresponds to and is slightly larger than that of the seed dispensing roller 0201, to prevent friction between the arc-shaped guide groove 0305 and the seed dispensing roller 0201 and hinder the rotation of the seed dispensing roller 0201. The lower end of the arc-shaped guide groove 0305 at the lower end of the seed protection guide plate is connected to the seed dispensing mechanism.

[0041] During operation, multiple seed cleaning wheels 0301 are installed above the seed metering roller 0201. The positions of these seed cleaning wheels 0301 correspond to the positions of each row of seed adsorption ports 0205 on the seed metering roller 0201. The function of the seed cleaning wheels 0301 is to remove excess seeds adsorbed by the seed adsorption ports 0205, thereby ensuring the single-seed rate of sowing. The removed seeds will fall back into the seed box 0401 for subsequent adsorption. The position of the seed cleaning wheels 0301 is fixed by the seed cleaning wheel shaft 0302 and the semi-circular groove 0304 at the upper end of the seed guide plate. The seed cleaning wheel shaft 0302 passes through the seed cleaning wheel 0301 and the seed metering device housing 0101. The seed cleaning wheel shaft 0302 is fixed to the outside of the seed metering device housing 0101 by a circular seed cleaning wheel shaft fastener 0303. The seed cleaning wheel shaft 0302 and the seed metering device housing 0101 are sealed with a sealing part to prevent positive pressure leakage. The size of the semi-circular groove 0304 at the upper end of the seed guide plate corresponds to that of the seed cleaning wheel 0301, which serves to fix the position of the seed cleaning wheel 0301 on the seed cleaning wheel shaft 0302. The arc dimension of the arc-shaped seed guide groove 0305 at the lower end of the seed guide plate corresponds to the size of the seed dispensing roller 0201 and is slightly larger, to prevent the arc-shaped seed guide groove 0305 at the lower end of the seed guide plate from rubbing against the seed dispensing roller 0201 and hindering the rotation of the seed dispensing roller 0201.

[0042] In some implementations, see Figure 5The seed box 0401 has an opening on one side near the seed metering roller 0201 and is matched with the seed metering roller 0201 with a gap smaller than the diameter of the seed. The bottom of the seed box 0401 is fixedly installed by a hollow seed box shaft 0402. Both ends of the hollow seed box shaft 0402 are fixed to the seed metering device housing 0101 by horseshoe-shaped seed box shaft fasteners 0403. One end of the hollow seed box shaft 0402 is connected to a positive pressure fan, and the other end is closed. The hollow seed box shaft 0402 is provided with ventilation holes that connect to the seed box 0401.

[0043] In some implementations, see Figure 7 The seed metering mechanism includes a ground wheel 0501, a ground wheel seed metering wheel axle 0502, a seed metering wheel 0503, a seed guide tube 0504, a seed dispensing tube 0505, and a flexible hose 0506. One end of the flexible hose 0506 is connected to the lower end of the arc-shaped guide groove 0305 at the lower end of the seed guide plate. The other end of the flexible hose 0506 passes through the seed guide tube opening 0103 and is connected to the seed guide tube 0504. The other end of the seed guide tube 0504 is connected to the seed dispensing tube 0505. The seed tube 0505 is fixed on the circumferential surface of the seed metering wheel 0503. The ground wheel 0501 of the seed metering mechanism is rotatably mounted on both sides of the seed metering wheel 0503 through the ground wheel seed metering wheel shaft 0502, and its radius is greater than the sum of the radius of the seed metering wheel 0503 and the diameter of the seed tube 0505, so as to ensure that the seed tube 0505 is not worn by the ground when the ground wheel 0501 of the seed metering mechanism moves. The ground wheel seed metering wheel shaft 0502 is connected to the seed metering roller drive shaft 0203 through a transmission mechanism.

[0044] During operation, the lower end of the arc-shaped seed guide groove 0305 of the seed guide plate is close to the flexible tube 0506. When the seed metering roller 0201 rotates, when the seed suction port 0205 rotates to a position above the flexible tube 0506, the pressure difference between the inner and outer sides of the seed suction port 0205 is lost, releasing the seeds. The released seeds fall into the flexible tube 0506, and the positive pressure airflow inside the seed metering device housing 0101 will accelerate the seeds out of the flexible tube 0506. Under the action of the airflow, the seeds move through the flexible tube 0506 to the seed guide tube 0504, which connects the flexible tube 0506 to the seed delivery tube 0505, and then through the seed guide tube 0504 to the seed delivery tube 0505. The seed delivery tube 0505 is not a completely circular tube, but an incompletely circular tube with a missing part, which is in close contact with the seed metering wheel 0503 of the seed delivery mechanism. Here, the seeds are clamped together by the seed delivery tube 0505 and the seed metering wheel 0503 under a frictional force. Under the action of the positive pressure airflow inside the seed delivery tube 0505, the seeds are ejected at a relatively high speed opposite to the running speed of the seed metering device, thus achieving zero-speed seed delivery. The movement of the seed metering mechanism is achieved by the seed metering mechanism ground wheels 0501 on both sides of the seed metering wheel 0503, and the seed metering mechanism moves passively.

[0045] The working process of this application:

[0046] After the seed metering device starts working, the impeller shaft inside the airlock, the negative pressure fan connected to the negative pressure air outlet 0204 of the negative pressure chamber, the positive pressure fan connected to the hollow seed box shaft 0402, and the seed metering roller drive shaft all begin to operate. As the impeller shaft inside the airlock rotates, seeds continuously enter the seed metering device housing 0101 through the airlock and fall into the seed box 0401, ensuring that positive pressure does not leak from the airlock. Driven by the seed metering roller drive shaft 0203, the seed metering roller 0201 rotates at high speed. After the positive and negative pressure fans start working, the inside of the seed metering device housing 0101 is filled with positive pressure, a portion of the inside of the seed metering roller 0201 is filled with negative pressure, and the pressure in the remaining areas of the seed metering roller 0201 is equivalent to atmospheric pressure.

[0047] The entire seed metering device housing 0101 is completely sealed. Seeds fall into the seed box 0401 through the airlock located above the seed metering device housing and the connection port 0102 between the seed metering device housing and the airlock. The working principle of the airlock is that when the seeds enter the impeller-type airlock, the impeller rotates according to the properties of the material and the conveying requirements. During the rotation of the impeller, the material is evenly distributed on the blades, forming a stable material layer. The outlet inside the airlock housing is closed to prevent material leakage, while also ensuring that the positive pressure inside the seed metering device housing 0101 does not leak. The hollow shaft 0402 passing through the seed metering device housing 0101 and the seed box 0401 serves to fix the posture and position of the seed box 0401, provide a positive pressure greater than atmospheric pressure inside the seed metering device housing 0101, and also activate the seed population inside the seed box 0401. The protrusions on the hollow shaft 0402 correspond to the grooves in the seed box 0401 to fix the position of the seed box 0401. The horseshoe-shaped hollow shaft fastener 0403 serves to fix the position of the hollow shaft 0402. A sealing part is used to seal between the hollow shaft 0402 and the housing 0101 to prevent positive pressure leakage.

[0048] Multiple seed-cleaning wheels 0301 are installed above the seed metering roller 0201. The positions of these wheels correspond to the positions of each row of seed adsorption ports 0205 on the seed metering roller 0201. The function of the seed-cleaning wheels 0301 is to remove excess seeds adsorbed by the seed adsorption ports 0205, thereby ensuring a high single-seed sowing rate. The removed seeds fall back into the seed box 0401 for subsequent adsorption. The position of the seed-cleaning wheels 0301 is fixed by the seed-cleaning wheel shaft 0302 and the semi-circular groove 0304 at the upper end of the seed guide plate. The seed-cleaning wheel shaft 0302 passes through the seed-cleaning wheel 0301 and the housing 0101. It is fixed to the outside of the seed metering housing 0101 by a circular seed-cleaning wheel shaft fastener 0303. A sealing component is used to seal the seed-cleaning wheel shaft 0302 with the seed metering housing 0101 to prevent positive pressure leakage. The size of the semi-circular groove 0304 at the upper end of the seed guide plate corresponds to that of the seed cleaning wheel 0301, which serves to fix the position of the seed cleaning wheel 0301 on the seed cleaning wheel shaft 0302. The arc dimension of the arc-shaped seed guide groove 0305 at the lower end of the seed guide plate corresponds to the size of the seed dispensing roller 0201 and is slightly larger, to prevent the arc-shaped seed guide groove 0305 at the lower end of the seed guide plate from rubbing against the seed dispensing roller 0201 and hindering the rotation of the seed dispensing roller 0201.

[0049] Another function of the arc-shaped seed-protecting guide groove 0305 at the lower end of the seed-protecting guide plate is to ensure that the adsorbed seeds will not fall due to unknown factors, and to ensure that the seeds can fall smoothly into the seed guide tube 0506 during the seed feeding process after the seed suction process is completed. The end of the arc-shaped seed-protecting guide groove 0305 at the lower end of the seed-protecting guide plate is close to the flexible tube 0506. When the seed discharging roller 0201 rotates, when the seed suction port 0205 rotates to a position above the flexible tube 0506, the pressure difference between the inner and outer sides of the seed suction port 0205 will be lost, releasing the seeds. The released seeds fall into the hose 0506. The positive pressure airflow inside the seed metering device housing 0101 accelerates the seeds out of the hose 0506. Under the action of the airflow, the seeds move through the hose 0506 to the seed guide tube 0504, which connects the hose 0506 to the seed delivery tube 0505. The seed delivery tube 0505 is not a perfectly circular tube, but rather an incompletely circular tube with a missing section that is in close contact with the seed metering wheel 0503 of the seed delivery mechanism. Here, the seeds are clamped by friction between the seed delivery tube 0505 and the seed metering wheel 0503. Under the action of the positive pressure airflow inside the seed delivery tube 0505, the seeds are ejected at a relatively high speed opposite to the operating speed of the seed metering device, thus achieving zero-speed seed delivery. The seed metering mechanism moves passively via the seed metering mechanism ground wheels 0501 on both sides of the seed metering wheel 0503.

[0050] The seed metering wheel 0503 is connected to the ground wheel 0501 of the seed metering mechanism via the ground wheel axle 0502. The seed metering roller 0201 rotates via the drive shaft 0203 connected to the transmission mechanism. Negative pressure chambers 0202 are located on both sides of the seed metering roller 0201. As the seed metering roller 0201 rotates, the position and orientation of the negative pressure chambers 0202 remain constant, providing negative pressure to one-third of the internal area of ​​the seed metering roller 0201 and connecting it to the outside. Multiple partitions are installed inside the seed metering roller 0201, dividing the internal area into several independent sections. A circular channel on the outside of the negative pressure chamber 0202 connects to a negative pressure fan, providing negative pressure to a portion of the internal area of ​​the seed meterer. The negative pressure airflow is divided into multiple negative pressure adsorption areas within the negative pressure chamber 0202 through air passages to prevent uneven airflow distribution within the seed metering roller 0201.

[0051] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0052] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0053] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A precision seed metering device for maize based on airflow disturbance seed filling, characterized in that: The aforementioned airflow-driven precision seed metering device for corn includes a seed metering housing (0101), a seed box (0401), a seed suction mechanism, a seed metering mechanism, and a seed protection guide plate. The seed suction mechanism is rotatably installed inside the seed metering housing (0101), and the seed box (0401) is installed on one side of the seed suction mechanism. The seed protection guide plate is installed inside the seed metering housing (0101) and is located above the seed suction mechanism to ensure that the seeds being suctioned will not fall off due to unknown factors. One end of the seed metering mechanism is connected to the lower end of the seed protection guide plate, and the other end is located outside the seed metering housing (0101). The seed suction mechanism suctions the seeds in the seed box (0401) and then performs uniform seed metering through the seed metering mechanism. The seed suction mechanism includes a seed metering roller (0201), which is connected to a drive mechanism via a seed metering roller drive shaft (0203) and rotates. The seed box (0401) has an opening on one side near the seed metering roller (0201) and is matched with the seed metering roller (0201) with a clearance smaller than the diameter of the seed. The bottom of the seed box (0401) is fixedly installed via a hollow seed box shaft (0402). Both ends of the hollow seed box shaft (0402) are fixed to the seed metering device housing (0101) via horseshoe-shaped seed box shaft fasteners (0403). One end of the hollow seed box shaft (0402) is connected to a positive pressure fan, and the other end is closed. The hollow seed box shaft (0402) is provided with ventilation holes that connect to the seed box (0401). The seed metering mechanism includes a ground wheel (0501), a ground wheel seed metering wheel axle (0502), a seed metering wheel (0503), a seed guide tube (0504), a seed delivery tube (0505), and a flexible hose (0506). One end of the flexible hose (0506) is connected to the lower end of the arc-shaped guide groove (0305) at the lower end of the seed guide plate. The other end of the flexible hose (0506) passes through the seed guide tube opening (0103) and is connected to the seed guide tube (0504). The other end of the seed guide tube (0504) is connected to the seed delivery tube (0505). The seed delivery tube (0505) is fixed on the circumferential surface of the seed metering wheel (0503). The ground wheel (0501) is rotatably mounted on both sides of the seed metering wheel (0503) via the ground wheel seed metering wheel shaft (0502), and its radius is greater than the sum of the radius of the seed metering wheel (0503) and the diameter of the seeding tube (0505), ensuring that the seeding tube (0505) is not worn by the ground when the ground wheel (0501) of the seed metering mechanism moves. The ground wheel seed metering wheel shaft (0502) is connected to the seed metering roller drive shaft (0203) through the transmission mechanism. The seeding tube (0505) is not a completely circular tube, but an incomplete circular tube with a missing part. The missing part is in close contact with the seed metering wheel (0503) of the seed metering mechanism.

2. The precision seed metering device for maize based on airflow disturbance seed filling according to claim 1, characterized in that: The seed metering device housing (0101) is provided with a seed metering device housing and a connection port (0102) for connecting the airlock, a seed guide pipe port (0103) for installing the seed metering mechanism, a negative pressure air chamber port (0104) for installing the seed suction mechanism, and a seed box fixing shaft port (0105) for fixing the seed box (0401).

3. The precision seed metering device for maize based on airflow disturbance seed filling according to claim 2, characterized in that: The seed metering roller (0201) has seed adsorption ports (0205) evenly arranged in an array. Negative pressure air chambers (0202) are provided at both ends of the seed metering roller (0201). The negative pressure air chambers (0202) are rotatably installed at the negative pressure air chamber inlet (0104). The negative pressure air chambers (0202) are driven to rotate by a drive mechanism connected to the seed metering roller drive shaft (0203). The negative pressure air chamber (0202) has a negative pressure airflow outlet (0204) connected to a negative pressure fan at one end away from the seed metering roller (0201), and a negative pressure airflow inlet (0206) connected to the seed metering roller (0201) at the other end.

4. The flow-guiding and sorting precision seed metering device for maize based on airflow disturbance seed filling according to claim 3, characterized in that: The seed metering device also includes a seed cleaning mechanism, which includes a seed cleaning wheel (0301). The seed cleaning wheel (0301) is rotatably mounted on the upper side of the seed metering roller (0201) via a seed cleaning wheel shaft (0302). The two ends of the seed cleaning wheel shaft (0302) pass through the seed guide tube opening (0103) and are mounted on the seed metering device housing (0101) via seed cleaning wheel shaft fasteners (0303). The position of the seed cleaning wheel (0301) corresponds to the position of each row of seed adsorption ports (0205) on the seed metering roller (0201), and is used to clean away the excess seeds adsorbed by the seed adsorption ports (0205) to ensure the single seed rate of sowing. The cleaned seeds will fall back into the seed box (0401) for subsequent adsorption.

5. The flow-guiding and sorting precision seed metering device for maize based on airflow disturbance seed filling according to claim 4, characterized in that: The seed protection guide plate includes a semi-circular groove (0304) at the upper end and an arc-shaped guide groove (0305) at the lower end. The size of the semi-circular groove (0304) at the upper end corresponds to the size of the seed cleaning wheel (0301), which can fix the position of the seed cleaning wheel (0301) on the seed cleaning wheel shaft (0302). The arc size of the arc-shaped guide groove (0305) at the lower end corresponds to the size of the seed dispensing roller (0201) and is slightly larger, so as to prevent the arc-shaped guide groove (0305) at the lower end of the seed protection guide plate from rubbing against the seed dispensing roller (0201) and hindering the rotation of the seed dispensing roller (0201). The lower end of the arc-shaped guide groove (0305) at the lower end of the seed protection guide plate is connected to the seed dispensing mechanism.

Images