Centrifugal spreading disc, spreading device and agricultural drone

Abstract

The application provides a centrifugal type sowing disc, a sowing device and an agricultural unmanned aerial vehicle, and relates to the field of agriculture. The centrifugal type sowing disc comprises a circular center disc body, a rotating shaft vertically arranged at the center of the center disc body, at least one annular disc body arranged at the outer edge of the center disc body, wherein the at least one annular disc body is coaxially arranged with the center disc body, and the center disc body and the at least one annular disc body are arranged on different planes parallel to each other, respectively, a connecting piece connected between the at least one annular disc body and the center disc body, wherein the connecting direction of the connecting piece is perpendicular to the center disc body, and a driving piece connected to the rotating shaft, used for driving the rotating shaft to rotate, so as to drive the center disc body and the at least one annular disc body to rotate. Compared with the sowing disc formed by a single disc in the prior art, the three-dimensional sowing disc with multiple disc bodies provided by the application can have better sowing uniformity.

Description

Technical Field

[0001] This application relates to the agricultural field, and more specifically, to centrifugal seeding discs, seeding devices, and agricultural drones. Background Technology

[0002] The seeding disc is a key component of modern agricultural seeding machinery. Utilizing advanced physical principles and engineering design, it achieves efficient and uniform seed sowing. The main function of the seeding disc is to remove seeds from the storage bin and accurately sow them into the soil at a specific speed and spacing. This equipment plays a vital role in agricultural production, helping to increase crop yields, save seeds, reduce labor intensity, and achieve agricultural modernization.

[0003] Currently, centrifugal seeding discs are widely used in agricultural drones for fertilization and seeding. In some conventional centrifugal seeding disc designs, the disc is circular and rotates at a certain angular velocity. After the material falls into the disc, it is thrown outward under the action of centrifugal force. When using this type of seeding disc, the material distribution after landing is circular. This shape causes the material to be distributed unevenly along the seeding path, with more material on the sides and less in the middle.

[0004] Therefore, improving the uniformity of centrifugal seeding discs is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] This application provides a centrifugal seeding disc, a seeding device, and an agricultural drone, which can achieve better seeding uniformity.

[0006] In a first aspect, a centrifugal spreading disc is provided, comprising: a circular central disc; a rotating shaft perpendicularly disposed at the center of the central disc; at least one annular disc disposed at the outer edge of the central disc, the at least one annular disc being coaxially disposed with the central disc, and the at least one annular disc and the central disc being respectively disposed on different parallel planes; a connecting member connecting the at least one annular disc and the central disc, the connecting direction of the connecting member being perpendicular to the central disc; and a driving member connected to the rotating shaft for driving the rotating shaft to rotate, thereby causing the central disc and the at least one annular disc to rotate.

[0007] The technical solution of this application improves the existing integrated disc-structured spreading disc into a three-dimensional spreading disc with multiple discs. The material spread by each disc can cover a circular area of ​​a specific width and size. Compared with the circular spreading area formed by a single disc in the prior art, the hollow area of ​​the circular spreading area formed by the central disc in this application is smaller. The outer circular discs can cooperate with the central disc, so that the circular spreading areas generated by the outer discs and the circular spreading areas generated by the central disc overlap to form a larger ring, thereby reducing the area of ​​the hollow area and improving the uniformity of spreading distribution.

[0008] In some possible implementations, the central disc is disposed below at least one annular disc; and / or, in the case where the centrifugal spreading disc includes multiple annular discs, the innermost annular disc is disposed below the outermost annular disc.

[0009] In this implementation method, the material falls from above into different discs and is thrown out by the discs. Other discs will not affect or interfere with the movement of the thrown material. In other words, the thrown material will not fall back onto other discs, thereby further ensuring the uniformity of the spreading disc.

[0010] In some possible implementations, the radius of the central disc is different from the width of at least one annular disc; and / or, in the case where the centrifugal spreading disc includes multiple annular discs, the widths of the multiple annular discs are different from each other.

[0011] In some possible implementations, the centrifugal spreading disc comprises: n-1 annular discs, where n is a positive integer greater than 1, and the overall radius of the centrifugal spreading disc is c; the radius of the central disc is...

[0012] In some possible implementations, the width of the j-th annular disk, which is the distance from the central disk among the n-1 annular disks, is... Where j is a positive integer less than or equal to n and greater than 0.

[0013] Through the above implementation method, the size of each disc in the centrifugal spreading disc can be specially designed so that the corresponding annular spreading areas of each disc can be connected to each other, thereby achieving the best spreading effect.

[0014] In some possible implementations, the material distributed in the central disc and the n-1 annular discs is in a continuous circular pattern.

[0015] In some possible implementations, the overall distribution of material spread by the centrifugal spreading disc is in the form of hollow rings, the inner diameter of which is related to the number of at least one annular discs; the greater the number of at least one annular discs, the smaller the inner diameter of the hollow rings.

[0016] In this embodiment, the smaller the inner diameter of the hollow ring, the more uniform the spreading effect of the centrifugal spreading disc.

[0017] In some possible implementations, the outer diameter of the hollow ring is related to the angular velocity of the centrifugal spreading disk; the greater the angular velocity, the larger the outer diameter of the hollow ring.

[0018] In this embodiment, the outer diameter of the hollow ring can be increased by increasing the angular velocity of the centrifugal spreading disc, thereby maximizing the spreading effect while ensuring the spreading area.

[0019] In some possible implementations, each of the central disc and at least one annular disc is provided with at least one guide rail.

[0020] In some possible implementations, each disc is provided with multiple guide rails, which are centrally symmetrical with respect to the rotation axis.

[0021] In some possible implementations, the number of annular disks is between 1 and 4.

[0022] In this embodiment, considering both manufacturing costs and spreading uniformity, the number of annular discs is set between 1 and 4, which can achieve the desired effect of both.

[0023] In a second aspect, a spreading device is provided, comprising: a material box, and a centrifugal spreading disc as described in the first aspect or any possible embodiment of the first aspect; the material box is disposed above the centrifugal spreading disc, and the material in the material box falls into the centrifugal spreading disc and is spread out under the action of centrifugal force.

[0024] Thirdly, an agricultural drone is provided, comprising: a power unit and a spreading device as provided in the second aspect, wherein the power unit is used to drive the agricultural drone to move, and the spreading device is used to spread materials while the agricultural drone is moving.

[0025] Installing centrifugal seeding discs with uniform seeding effect in seeding devices and agricultural drones can improve seeding efficiency, reduce material waste (such as seeds), and help improve crop yield and quality. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a centrifugal spreading disc provided in an embodiment of this application.

[0027] Figure 2 yes Figure 1 A schematic top view of the spreading disk shown.

[0028] Figure 3 yes Figure 1 The image shows a top view of a seeding area corresponding to the seeding disk.

[0029] Figure 4 yes Figure 1 A top view of another spreading area corresponding to the spreading disk shown.

[0030] Figure 5 This is a schematic structural diagram of a centrifugal spreading disc provided in an embodiment of this application.

[0031] Figure 6 This is a schematic diagram showing the distribution of the two types of guide rails provided in the embodiments of this application.

[0032] Figure 7 This is a schematic top view of a centrifugal spreading disc provided in an embodiment of this application.

[0033] Figure 8 This is a schematic structural block diagram of a spreading device provided in an embodiment of this application.

[0034] Figure 9 This is a schematic structural block diagram of an agricultural drone provided in an embodiment of this application. Detailed Implementation

[0035] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0036] This application relates to seeding discs, and more specifically, to centrifugal seeding discs. The working principle of a centrifugal seeding disc is simple and effective. Seeds on the disc are subjected to centrifugal force, thus gaining sufficient speed and power to be evenly distributed in the soil. The rotational speed of the seeding disc, the aperture size, and the forward speed of the seeder can all be adjusted according to the characteristics of the seeds and the sowing requirements to ensure uniformity and accuracy of sowing. Centrifugal seeding discs are suitable for sowing large seeds, such as corn, soybeans, and rapeseed. They offer efficient, uniform, and reliable sowing results, increasing crop yield, saving seeds, reducing labor intensity, and achieving agricultural modernization. Of course, in some special applications, centrifugal seeding discs can also be used to sow fertilizers, such as granular solid fertilizers.

[0037] Figure 1 A schematic diagram of a centrifugal spreading disc 100 provided in an embodiment of this application is shown.

[0038] like Figure 1As shown, the spreading disc 100 is a circular design with a ring of guide rails 101 arranged symmetrically around its center. During operation, the spreading disc 100 rotates at a certain angular velocity ω. After the material falls from above, it is propelled by the guide rails 101 on the disc and thrown outwards along the guide rails under centrifugal force. With this design, at a certain angular velocity, the speed at which the material leaves the spreading disc 100 is within a certain range, ensuring that the material distributed within a specific area after landing.

[0039] Figure 2 It shows Figure 1 A schematic top view of the spreading disk 100 shown. Figure 3 It shows Figure 1 A top view of the spreading area corresponding to the spreading disk 100 shown.

[0040] See Figure 2 and Figure 3 As shown, let the plane containing the spreading disk 100 be a horizontal plane with an angular velocity of ω. Assume the material falls vertically onto the spreading disk 100, and let the radius of the landing point be b. The material is immediately driven by the guide rail 101 upon landing on the spreading disk 100, and rotates with the spreading disk 100. Finally, it moves outward along the guide rail 101 and is thrown out at the outer edge of the guide rail 101. The radius of the spreading disk 100 is c.

[0041] When the material leaves the spreading disc by 100°, its tangential velocity (or linear velocity) v t =ωc, radial velocity 100 degrees away from the seeding disk Assuming the time it takes for the material to fall to the ground after being thrown out is t, then its linear velocity v t The distance d of the motion along the tangential direction t =tωc, the distance traveled radially is

[0042] Ignoring the influence of the radius of the spreading disk 100, the radius of the material distribution can be considered as follows: Right now Therefore, it can be seen that its distribution area is a ring, and the width of the ring is...

[0043] In the above calculation formula, the unit of angular velocity ω is rad / s, the units of radius b and radius c are m, and the unit of linear velocity v is... t and radial velocity v r The unit is m / s, and the distance is d. t d r The units for the radius d of the material distribution and the width Δd of the ring are meters.

[0044] When equipped with the above Figure 1When the agricultural machinery with the spreading disc 100 spreads the material along the set route, the distribution of the material along the spreading route can be as follows: Figure 4 As shown, the distribution shows a trend of more seeds on both sides and less in the middle, resulting in uneven sowing.

[0045] In view of this, this application provides a new centrifugal spreading disc that can achieve better spreading uniformity.

[0046] Figure 5 A schematic structural diagram of a centrifugal spreading disc 200 provided in an embodiment of this application is shown.

[0047] like Figure 5 As shown, the centrifugal spreading disc 200 includes: a circular central disc 210, at least one annular disc 220, a rotating shaft 230, a connector 240, and a driving component (not shown in the figure).

[0048] Specifically, the rotating shaft 230 is perpendicularly disposed at the center of the central disk 210. At least one annular disk 220 is disposed on the outer edge of the central disk 210, and the at least one annular disk 220 is coaxially disposed with the central disk 210, and the at least one annular disk 220 and the central disk 210 are respectively disposed on different parallel planes. A connecting member 240 connects the at least one annular disk 220 and the central disk 210, and the connecting direction of the connecting member 240 is perpendicular to the central disk 210. A driving member is connected to the rotating shaft 230 and is used to drive the rotating shaft 230 to rotate, thereby causing the central disk 210 and the at least one annular disk 220 to rotate.

[0049] In this embodiment, the centrifugal spreading disc 200 is not a single disc structure, but includes a central disc 210 and at least one annular disc 220 coaxially arranged with the central disc 210. When the centrifugal spreading disc 200 is placed horizontally, the at least one annular disc 220 and the central disc 210 are respectively arranged at different horizontal heights.

[0050] The at least one annular disc 220 and the central disc 210 can be connected by a connector 240. The connector 240 may include a rigid connector, which, while fixing the multiple discs together, also ensures a height difference between the discs. Optionally, connectors 240 can be provided between each pair of adjacent discs in the at least one annular disc 220 and the central disc 210. The number of connectors 240 between adjacent discs can be set according to actual needs, for example... Figure 5 As shown, four connectors 240 can be provided between two adjacent discs, and these four connectors 240 can be evenly distributed on the edge of the disc.

[0051] Optionally, between two adjacent annular disks 220, multiple connectors 240 can be connected to the inner edge of one annular disk 220 and the outer edge of the other annular disk 220. Between the central disk 210 and its adjacent annular disks 220, multiple connectors 240 can be connected to the edge of the central disk 210 and the inner edge of the annular disk 220.

[0052] In addition, in this embodiment of the application, the rotating shaft 230 may be disposed at the center of the central disk 210 and at the center of at least one annular disk 220. The rotating shaft 230 may be fixedly connected to the central disk 210. When the rotating shaft 230 is driven to rotate by the driving member, the central disk 210 may drive at least one annular disk 220 to rotate through the connecting member 240.

[0053] The technical solution of this application improves the existing integrated disc-structured spreading disc into a three-dimensional spreading disc with multiple discs. The material spread by each disc can cover a circular area of ​​a specific width and size. As analyzed in the above application embodiment, for a spreading disc consisting of only a single disc, the radius of the hollow area in the hollow ring of material distribution is tωc. That is, with ω and t constant, the smaller the radius c of the spreading disc, the smaller the inner diameter of the hollow ring of material distribution, and the smaller the area of ​​the hollow area. Compared with the spreading disc in the prior art consisting of only a single disc, the radius of the central disc in this application embodiment is smaller. Therefore, compared with the annular spreading area formed by a single disc in the prior art, the hollow area of ​​the annular spreading area formed by the central disc in this application embodiment is smaller. The outer annular disc can cooperate with the central disc, so that the annular spreading area generated by the annular disc and the annular spreading area generated by the central disc overlap, thereby forming a larger ring, reducing the area of ​​the hollow area and improving the uniformity of spreading distribution.

[0054] Optionally, in some embodiments, the central disc 210 is disposed below at least one annular disc 220; and / or, in the case where the centrifugal spreading disc 200 includes a plurality of annular discs 220, the inner annular disc 220 of the plurality of annular discs 220 is disposed below the outer annular disc 220.

[0055] For example, such as Figure 5 As shown, the central disc 210 is located at the bottom, and two annular discs 220 are arranged above the central disc 210 in ascending order of size.

[0056] In this implementation method, the material falls from above into different discs and is thrown out by the discs. Other discs will not affect or interfere with the movement of the thrown material. In other words, the thrown material will not fall back onto other discs, thereby further ensuring the uniformity of the spreading disc.

[0057] Alternatively, in some other embodiments, the central disc 210 may be positioned above the annular disc 220, and / or, the innermost annular disc 220 may be positioned above the outermost annular disc 220. In this embodiment, the disc size can be designed to prevent interference with materials ejected from other discs.

[0058] Optionally, see [link to relevant documentation] Figure 5 As shown, each of the central disc 210 and at least one annular disc 220 is provided with at least one guide rail 250. The guide rail 250 is arranged radially along the disc and can be used to guide the movement direction of the material falling onto the disc, so that the material can be spread more evenly into the soil.

[0059] Figure 6 A schematic diagram showing the distribution of two types of guide rails 250 is provided. Figure 6 This can be a schematic top view of the centrifugal spreading disc 200.

[0060] like Figure 6 As shown, each disc can be provided with multiple guide rails 250, and the multiple guide rails 250 on each disc can be centrally symmetrical with respect to the rotation axis 230.

[0061] like Figure 6 As shown in section (a), the multiple guide rails 250 on each disk can be linear guide rails. Or, as... Figure 6 As shown in part (b), the multiple guide rails 250 on each disc can be arc-shaped guide rails.

[0062] Optionally, in some embodiments, the number of annular disks 220 is between 1 and 4. As an example, Figures 5 to 6 The diagram shows two annular discs 220. The number of annular discs 220 can be designed according to actual needs. A higher number of annular discs 220 results in a more complex overall spreading disk and higher manufacturing costs, but better spreading uniformity. Conversely, a lower number of annular discs 220 results in a lower overall complexity and manufacturing cost, but also lower spreading uniformity. Therefore, in this embodiment, considering both manufacturing cost and spreading uniformity, the number of annular discs 220 is set between 1 and 4, achieving a balance between the two.

[0063] Optionally, in some embodiments, the radius of the central disk 210 is the same as the radius of at least one annular disk 220.

[0064] Alternatively, in other embodiments, the radius of the central disc 210 may be different from the width of at least one annular disc 220; and / or, in the case where the centrifugal spreading disc 200 includes a plurality of annular discs 220, the widths of the plurality of annular discs 220 are different from each other.

[0065] In this embodiment, the dimensions of each disc in the centrifugal spreading disc 200 can be specially designed so that the corresponding annular spreading areas of each disc can be connected to each other, thereby achieving the best spreading effect. Specifically, the dimensions of each disc can be calculated through the following process.

[0066] Figure 7 A schematic top view of a centrifugal spreading disc 200 provided in an embodiment of this application is shown. As an example, such as... Figure 7 As shown, each layer of the disk has two guide rails.

[0067] In polar coordinates, let the seeding disk 200 be the unit circle with a radius of 1. Divide it into several parts along the radial direction to form multiple concentric circles, and set guide rails between adjacent concentric circles. For example... Figure 7 As shown, the starting point of the first guide rail 251 in the innermost ring is k0 = 0, and the ending point is k1, meaning the radius of the central disk 210 in the innermost ring is k1. The starting point of the second guide rail 252 in the middle ring is k1, and the ending point is k2, meaning the radius of the annular disk 220 in the middle ring is k2. And so on. If the radius is divided into n parts, with n disks and n rings of guide rails, then the starting point of the i-th guide rail in the i-th ring is k0 = 0. i-1 The endpoint is k i The radius of the i-th annular disk 220 is k. i The starting point of the nth guide rail on the outermost ring is k. n-1 The endpoint is k n =1, the radius of the nth annular disk 220 on the outermost ring is 1. In Figure 7 In the middle, the outermost guide rail is the third guide rail 253, with its starting point at k2 and its ending point at 1. The radius of the outermost ring disk 220 is 1.

[0068] See above Figure 2 and Figure 3 Analysis of the material distribution on a single disk shows that the radius of the material distribution corresponding to a single disk is... Extending this to multiple disks yields the following results.

[0069] The radius d of the i-th annulus of material distribution formed by the i-th disk is... i for:

[0070]

[0071] Among them, b iLet be the radius of the material at the point where it lands on the i-th disk.

[0072] Therefore, d i The scope is:

[0073]

[0074] In order for two adjacent rings to be connected without overlapping, it is required that d i The upper limit is equal to d i+1 The lower limit, that is:

[0075]

[0076] After sorting, we get:

[0077] 2k i 2 -k i-1 2 =k i+1 2 ;

[0078] Based on the condition k0=0, k n =1, solving for the general term gives:

[0079]

[0080] The radius d of the circular distribution ring formed by the i-th disk i The scope is:

[0081]

[0082] Using n discs, n annular distributions of material can be obtained. These annular distributions are superimposed to form a whole. The innermost annular distribution is generated by the first disc (i.e., the central disc 210) located in the innermost circle of the spreading disc 200. The radius of this innermost annular distribution is... The outermost ring distribution is generated by the nth disk (i.e., the ring disk 220 with the largest radius) located on the outermost ring of the spreading disk 200, and the radius of this outermost ring is...

[0083] Because of d i The upper limit is equal to d i+1 The lower limit is such that all the rings form a continuous, non-overlapping splicing ring. Therefore, the radius of the splicing ring of the material distribution is... Width of splicing ring

[0084]

[0085] The theoretical range of values ​​for n is 1, 2, 3, ..., ∞.

[0086] When n=1,

[0087] When n=2,

[0088] When n approaches ∞, D ∞ ∈[0,tω],ΔD ∞ =tω.

[0089] The above derivation shows that by increasing the number of discs, the width of the splicing ring for material distribution can be gradually increased, meaning the material distribution gradually concentrates towards the center. The radius of the splicing ring will gradually decrease, starting from D1. Reduce to D ∞ The loss is tω, but this loss can be compensated by increasing ω.

[0090] Therefore, in this embodiment, the overall distribution of material spread by the centrifugal spreading disc 200 is a hollow ring. The inner diameter of the hollow ring is related to the number of at least one annular disc 220. The larger the number of at least one annular disc 220, the smaller the inner diameter of the hollow ring, and the more uniform the spreading effect of the centrifugal spreading disc 200.

[0091] Furthermore, the outer diameter of the hollow ring is also related to the number of at least one annular disc 220. The larger the number of at least one annular disc 220, the smaller the outer diameter of the hollow ring, which may affect the spreading area and thus reduce the spreading efficiency. However, the outer diameter of the hollow ring is also related to the angular velocity ω of the centrifugal spreading disc 200. The larger the angular velocity ω, the larger the outer diameter of the hollow ring. The outer diameter of the hollow ring can be increased by increasing the angular velocity ω of the centrifugal spreading disc 200, thereby maximizing the spreading effect while ensuring the spreading area.

[0092] The above example uses a centrifugal seeding disc 200 with a radius of 1 for calculation. When the radius of the centrifugal seeding disc 200 is c, the radius k of the i-th disc from the inside out... i The calculation is as follows:

[0093]

[0094] The first disk is the central disk 210, and its radius is...

[0095] When i is greater than 1, the i-th disk is a ring disk, that is, the radius of the i-th ring disk is... The radius of the hollow circle in the i-th annular disk is equal to the radius k of the (i-1)-th disk. i-1 Therefore, the width Δk of the i-th annular disk is... i The following can be calculated:

[0096]

[0097] In other words, the centrifugal spreading disc 200 may include n-1 annular discs 220, wherein the width of the j-th annular disc 220, which is located at a distance from the central disc 210, is... Where j is a positive integer less than or equal to n-1 and greater than 0.

[0098] In the above calculation formula, the radius c of the centrifugal spreading disc 200 is in meters, and the radii k1, k2, ..., k of each disc in the centrifugal spreading disc 200 are... i ... k n The unit is also m, and d is the radius of the i-th annulus of material distribution formed by the i-th disk. i The radius D of the splicing ring of the material distribution n Width ΔD of the splicing ring n The unit is m, and the unit of angular velocity ω is rad / s.

[0099] This application also provides a spreading device. Figure 8 A schematic structural block diagram of a spreading device 300 provided in an embodiment of this application is shown.

[0100] like Figure 8 As shown, the spreading device 300 includes a material box 310 and a centrifugal spreading disc 200 provided in any of the embodiments above. The material box 310 can be disposed above the centrifugal spreading disc 200, and the material contained therein can fall onto the surface of the centrifugal spreading disc 200 under the action of gravity. When the centrifugal spreading disc 200 rotates, the material can be spread out under the action of centrifugal force.

[0101] Optionally, the material contained in the material bin 310 may be granular seeds or fertilizer, etc.

[0102] Optionally, in addition to the material bin 310 and the centrifugal spreading disc 200, the spreading device 300 may further include a material distribution device, an adjusting device, a control device, and a monitoring device, etc. The material distribution device distributes the material from the material bin 310 to the centrifugal spreading disc 200. The adjusting device can adjust the rotational speed of the centrifugal spreading disc 200 to regulate the spreading speed. The control device may include an electronic control system for automatically adjusting sowing parameters, such as sowing rate and sowing quantity. The monitoring device can monitor the sowing rate and sowing quantity in real time to ensure the accuracy and uniformity of sowing.

[0103] This application also provides an agricultural drone. Figure 9 A schematic structural block diagram of an agricultural drone 400 provided in an embodiment of this application is shown.

[0104] like Figure 9 As shown, the agricultural drone 400 may include a power unit 410 and a spreading device 300 provided in the above embodiment. The power unit 410 is used to drive the agricultural drone 400 to move, and the spreading device 300 is used to spread materials when the agricultural drone 400 moves.

[0105] Optionally, the agricultural drone 400 can be a drone that flies in the sky, or it can be an unmanned agricultural machine that travels on land.

[0106] By incorporating a centrifugal spreading disc 200 with uniform spreading effect into the aforementioned spreading device 300 and agricultural drone 400, spreading efficiency can be improved, material (such as seeds) waste can be reduced, and crop yield and quality can be increased.

[0107] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, 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 on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0108] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0109] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0110] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0111] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A centrifugal spreading disc, characterized in that, include: A circular central disc; The rotation axis is vertically positioned at the center of the central disk. At least one annular disk is disposed on the outer edge of the central disk. The at least one annular disk is coaxially disposed with the central disk, and the at least one annular disk and the central disk are respectively disposed on different parallel planes. Among the multiple disks formed by the central disk and the at least one annular disk, the inner ring disk of two adjacent disks is disposed below the outer ring disk. A connector is attached between the inner edge of the outer ring disc and the outer edge of the inner ring disc. The connection direction of the connector is perpendicular to the central disc, and adjacent discs are separated from each other in the direction perpendicular to the central disc. A driving component, connected to the rotating shaft, is used to drive the rotating shaft to rotate, thereby causing the central disk and the at least one annular disk to rotate; The centrifugal spreading disc comprises n-1 annular discs, where n is a positive integer greater than 1, and the overall radius of the centrifugal spreading disc is c. The width of the j-th annular disk, which is the distance from the central disk among the n-1 annular disks, is , where j is a positive integer less than or equal to n-1 and greater than 0, and the material distribution of the central disk and the n-1 annular disks is a continuous ring.

2. The centrifugal spreading disc according to claim 1, characterized in that, The radius of the central disk is different from the width of the at least one annular disk; and / or, In the case where the centrifugal spreading disc comprises multiple annular discs, the widths of the multiple annular discs are different from each other.

3. The centrifugal spreading disc according to claim 1 or 2, characterized in that, The radius of the central disk is .

4. The centrifugal spreading disc according to claim 1 or 2, characterized in that, The overall distribution of the material spread by the centrifugal spreading disc is a hollow ring. The inner diameter of the hollow ring is related to the number of the at least one annular disc. The larger the number of the at least one annular disc, the smaller the inner diameter of the hollow ring.

5. The centrifugal spreading disc according to claim 4, characterized in that, The outer diameter of the hollow ring is related to the angular velocity of the centrifugal spreading disk; the greater the angular velocity, the larger the outer diameter of the hollow ring.

6. The centrifugal spreading disc according to claim 1 or 2, characterized in that, Each of the central disk and the at least one annular disk is provided with at least one guide rail.

7. The centrifugal spreading disc according to claim 6, characterized in that, Each disk is provided with multiple guide rails, which are centrally symmetrical with respect to the rotation axis.

8. The centrifugal spreading disc according to claim 1 or 2, characterized in that, The number of the annular disks is between 1 and 4.

9. A spreading device, characterized in that, include: The material bin, and the centrifugal spreading disc as described in any one of claims 1 to 8; The material box is positioned above the centrifugal spreading disc. After the material in the material box falls into the centrifugal spreading disc, it is spread out under the action of centrifugal force.

10. An agricultural unmanned aerial vehicle, characterized in that, include: The power unit and the spreading device as claimed in claim 9, wherein the power unit is used to drive the agricultural drone to move, and the spreading device is used to spread materials while the agricultural drone is moving.

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