A spreader and unmanned spreading apparatus

Abstract

The application discloses a spreader and unmanned spreading equipment, which comprises a driving unit and a flail plate. The driving shaft of the driving unit is connected with the flail plate. The flail plate comprises a base and a plurality of blades connected with the base. The plurality of blades are arranged at intervals around the rotation axis of the flail plate. The angles between the extension directions of the plurality of blades and the radial directions of the flail plate are not equal to 0°. Wherein, the surface of the blade close to the rotation axis of the flail plate is a working surface. When the spreader is in a working state, the driving unit drives the flail plate to rotate in a fixed direction. The fixed direction matches the outer normal direction of the working surface, so that the working surface can push the material towards the direction close to the rotation axis of the flail plate. During the working process, the working surface of the blade can push the material towards the center of the flail plate, so that the material distribution in the whole flail plate is more uniform. The situation that the material at the bottom of the flail plate is more than that at the top is effectively reduced, and the effect that the material can be more uniformly distributed in the working area when being thrown out is realized.

Description

Technical Field

[0001] This application relates to the technical field of automatic seeding machines, and more particularly to a seeder and unmanned seeding equipment. Background Technology

[0002] In the current field of plant protection, drones equipped with electric spreading systems achieve the function of automatically cruising and spreading seeds or fertilizers. Specifically, the spreading system includes a feed hopper and a spreading mechanism, with the spreading mechanism located below the feed hopper. The spreading mechanism includes a conveying component and a spreading component. In the spreading component, the rotating plane of the spinning disc is vertically set. The conveying component delivers material to the spinning disc, which rotates in one direction, causing the material to rotate and spreading out through centrifugal force. Because the material being thrown out has a velocity along the tangential direction of the circumference at the point of throwing out, that is, a horizontal component of velocity, the material at the top and bottom will fly out in significantly opposite horizontal directions. However, due to the influence of the material's own gravity, there is usually a significant amount of material at the bottom than at the top inside the spinning disc, which leads to the problem of uneven distribution of the final material. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a spreader and an unmanned spreading device that can solve the above-mentioned problems existing in the related technology.

[0004] To achieve the above objectives, this application adopts the following technical solution: On the one hand, a spreader is provided, including a drive unit and a spinning disc; The drive shaft of the drive unit is connected to the swivel disc; The swivel disc includes a base and a plurality of blades connected to the base. The plurality of blades are arranged at intervals around the rotation axis of the swivel disc, and the angle between the extension direction of the plurality of blades and the radial direction of the swivel disc is not equal to 0°. The surface of the blade near the rotation axis of the spinning disc is the working surface. When the spreader is in operation, the drive unit drives the spinning disc to rotate in a fixed direction. The fixed direction matches the outer normal direction of the working surface, so that the working surface can push the material towards the rotation axis of the spinning disc.

[0005] Optionally, the working surface is a continuous arc-shaped concave surface; the side of the blade closest to the rotation axis of the swivel disc is the first side, and the side furthest from the rotation axis of the swivel disc is the second side. Extending from the first side to the second side, the angle between the tangent direction of any point on the working surface and the radial direction of that point in the swivel plate gradually decreases.

[0006] Optionally, the working surface extends along an involute in the direction extending from the first side to the second side.

[0007] Optionally, the side of the blade closest to the rotation axis of the swivel disc is the first side, and the cylindrical cavity formed by each first side is the feed chamber. The spreader also includes a material pusher for conveying material to the slinger, the material pusher including a conveying pipe communicating with the feed chamber; when the spreader is in operation, the working surface pushes the material to gather towards the center of the feed chamber, and the material pusher pushes new material from the conveying pipe into the feed chamber.

[0008] Optionally, the radius of the feed chamber is the same as the inner diameter of the feed pipe.

[0009] Optionally, the side of the blade furthest from the rotation axis of the swivel disc is designated as the second side; with the rotation axis of the swivel disc as a reference, the radius of the location of the second side is 1.5-2 times the radius of the location of the first side.

[0010] Optionally, the slinger also includes a retaining ring. Along the axial direction of the slinger, the retaining ring and the base are respectively connected to two opposite sides of the blade. The center of the retaining ring forms a feed hole for communicating with the conveying pipe. Any two adjacent blades, together with the retaining rings and the base on both sides, form a material gathering cavity.

[0011] Optionally, the base is a closed disc shape, and the outer diameter of the base is equal to the outer diameter of the retaining ring.

[0012] Optionally, the spreader further includes a material pusher for conveying material to the spinning disc, the material pusher including a conveying pipe communicating with the feed chamber of the spinning disc; The slinger also includes a retaining ring. Along the axial direction of the slinger, the retaining ring and the base are respectively connected to two opposite sides of the blade. The retaining ring is located on the side of the blade closer to the conveying pipe, and a feed hole communicating with the conveying pipe is formed at the center of the retaining ring. The feed pipe is connected to a first protruding ring, which extends into the feed hole.

[0013] Optionally, a second protruding ring is provided on the side of the retaining ring near the material pusher, the second protruding ring is provided around the outer periphery of the first protruding ring, and the feed hole is provided on the second protruding ring.

[0014] Optionally, a protective cover is also included, the slinger is rotatably installed inside the protective cover, the conveying pipe is connected to the protective cover, and the first protruding ring is disposed on the inner side of the protective cover.

[0015] Optionally, it also includes a protective cover, the swivel disc is rotatably mounted inside the protective cover, the drive unit is mounted on one side of the protective cover, and the drive shaft extends into the protective cover and is connected to the swivel disc.

[0016] Optionally, the protective cover is provided with a feeding hole that communicates with the material pusher, through which the material pusher can push the material into the slinger.

[0017] Optionally, the slinger also includes a retaining ring. Along the axial direction of the slinger, the retaining ring and the base are respectively connected to two opposite sides of the blade. The retaining ring is located on the side of the blade closer to the feed hole, and a feed hole communicating with the feed hole is formed at the center of the retaining ring. The inner side of the protective cover is provided with a first protruding ring that surrounds the material feeding hole, and the side of the retaining ring near the first protruding ring is provided with a second protruding ring that surrounds the outer periphery of the first protruding ring.

[0018] Optionally, the protective cover includes a first protective plate and a second protective plate arranged in parallel. The drive unit is installed on the first protective plate, and the second protective plate is provided with a feeding hole communicating with a material pusher. The material pusher can push the material into the slinger through the feeding hole.

[0019] Optionally, the protective cover further includes a material guide connected between the first protective plate and the second protective plate. The material guide is located above the throwing disc and is used to block the material thrown upward.

[0020] Optionally, with the rotation axis of the spinning disc as the dividing reference, one side of the left and right sides of the spinning disc is the rising part, and the other side is the falling part; in the horizontal direction, the direction from the falling part to the rising part is the first horizontal direction. The material guide includes a first material guide plate, one end of which is close to the edge of the rising part, and the other end extends upward in the first horizontal direction.

[0021] Optionally, one end of the first guide plate is close to the edge of the upper half of the rising part.

[0022] Optionally, the guide component further includes a second guide plate, one end of which is close to the edge of the rising part, and the other end extends upward in a second horizontal direction, which is opposite to the first horizontal direction.

[0023] Optionally, the ends of the first guide plate and the second guide plate near the rising part are connected.

[0024] Optionally, the lower surface of the first guide plate and / or the second guide plate is a continuous arc-shaped concave surface.

[0025] Optionally, the end of the first guide plate and / or the second guide plate away from the swivel plate tends to extend in a horizontal direction.

[0026] Optionally, the guide component further includes a third guide plate, which is spaced below the first guide plate. One end of the third guide plate is close to the edge of the lower half of the rising part, and the other end extends upward in the first horizontal direction.

[0027] Optionally, the guide component further includes a fourth guide plate, which is disposed between the swivel disc and the second guide plate, and extends in the same direction as the inclination direction of the second guide plate.

[0028] Optionally, the lower surface of the first guide plate and / or the second guide plate is provided with a material-blocking protrusion. When the spreader is working, the material-blocking protrusion is used to shorten the distance that the material hitting it is thrown horizontally relative to the throwing disc.

[0029] Optionally, the material-blocking protrusion is configured as a hemispherical shape, and the lower surface of the first guide plate and / or the second guide plate is provided with one or more material-blocking protrusions at intervals.

[0030] Optionally, the first guard plate and the second guard plate are respectively fixedly connected to both sides of the guide member by connectors; Alternatively, one of the first guard plate and the second guard plate may be integrally formed with the guide component, while the other may be fixedly connected to the guide component via a connector.

[0031] Optionally, when the spreader is in operation, the rotation plane of the swivel disc is in a vertical position.

[0032] On the other hand, an unmanned seeding device is provided, including an unmanned vehicle and the aforementioned seeder mounted on the unmanned vehicle.

[0033] The beneficial effects of this application are as follows: In the spreader provided by this utility model, by designing the blades at a specific angle and setting the rotation direction of the spinning disc to a specific direction, the working surface of the blades can push the material towards the center of the spinning disc during operation, making the material distribution inside the entire spinning disc more uniform. This effectively reduces the situation where there is more material at the bottom than at the top of the spinning disc, and achieves the effect of more uniform material distribution in the working area when it is thrown out. This effectively overcomes the problem of uneven material distribution in the left and right sides of the spreading system in related technologies and improves the quality of spreading. Attached Figure Description

[0034] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0035] Figure 1 This is a schematic diagram of the structure of the spreader described in the embodiments of this application; Figure 2 This is a radial cross-sectional view of the spreader described in the embodiments of this application; Figure 3 This is an axial sectional view of the spreader described in the embodiments of this application; Figure 4 This is one of the exploded schematic diagrams of the dispersant described in the embodiments of this application; Figure 5 This is a second schematic diagram of the explosion of the spreader described in the embodiments of this application; Figure 6 This is the third of the exploded schematic diagrams of the dispersant described in the embodiments of this application; Figure 7 This is a radial cross-sectional view of one embodiment of the swivel disc described in this application. Figure 8 This is a perspective view of another embodiment of the disc-spinning method described in this application. Figure 9 for Figure 8 The radial sectional view of the slinger shown; Figure 10 This is a diagram showing the material gathering effect during the disc-spinning operation described in the embodiments of this application (the shaded area in the diagram represents the material). Figure 11 This is a schematic diagram showing the state of the dispenser in Example 1 during operation; Figure 12 This is a schematic diagram showing the state of the dispenser in Example 2 during operation; Figure 13 This is a schematic diagram showing the state of the dispenser in Example 3 during operation; Figure 14 This is a schematic diagram of the state of the dispenser in Example 4 during operation.

[0036] In the picture: 1. Throwing disc; 101. Rising section; 102. Falling section; 11. Blade; 12. Base; 13. Retaining ring; 131. Feed hole; 132. Second convex ring; 14. Feed chamber; 15. Gathering chamber; 2. Protective cover; 21. Guide component; 211. First guide plate; 212. Second guide plate; 213. Third guide plate; 214. Fourth guide plate; 215. Material blocking protrusion; 22. First guard plate; 23. Second guard plate; 231. Feeding hole; 232. First convex ring; 3. Drive unit. Detailed Implementation

[0037] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" 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 utility model based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the current field of plant protection technology, automated cruise spreading operations based on UAV platforms equipped with electric spreading systems have become an important technological direction. The spreading systems in these technologies typically consist of a feed hopper and a spreading mechanism. The spreading mechanism, located at the bottom of the feed hopper, specifically includes a material conveying component and a spreading component. In the structural design of the spreading component, the rotating plane of the spinning disc is arranged vertically. The material conveying component transports materials such as seeds and fertilizers to the surface of the spinning disc, and the centrifugal force generated by the unidirectional rotation of the disc spreads the materials to the work area.

[0041] From a kinetic perspective, when materials are thrown out, they possess a velocity along the tangent of the circumference of the throwing disc's ejection point. This velocity has a horizontal component, meaning that materials at the top and bottom will fly out in distinctly opposite horizontal directions. However, due to the material's own gravity, there is usually a significant amount of material at the bottom than at the top within the throwing disc. This distribution difference directly disrupts the left-right symmetry of material distribution: taking a clockwise rotation of the throwing disc as an example, materials near the bottom will have a significant leftward velocity, eventually landing in the lower left of the disc, while the bottom material accumulates more due to gravity, resulting in more material landing in the lower left area of ​​the disc. Conversely, materials near the top will have a significant rightward velocity, eventually landing in the lower right of the disc, while the top material, due to its smaller quantity, will result in significantly less material landing on the right side of the disc than on the left, exhibiting a left-right imbalance.

[0042] In summary, the current spreading system has a significant problem of uneven distribution of the final material from left to right.

[0043] To overcome the above technical problems, refer to Figures 1-6 This application provides a distributor, including a drive unit 3 and a spinning disc 1.

[0044] The drive shaft of the drive unit 3 is connected to the sling plate 1. The drive unit 3 can drive the sling plate 1 to rotate, and the sling plate 1 drives the material to rotate, so that the material can obtain a rotational speed. The swivel disc 1 includes a base 12 and a plurality of blades 11 connected to the base 12. The plurality of blades 11 are arranged at intervals around the rotation axis of the swivel disc 1. The angle between the extension direction of the plurality of blades 11 and the radial direction of the swivel disc 1 is not equal to 0°, that is, the extension direction of the blades 11 is inclined relative to the radial direction of the swivel disc 1. In the swivel disc 1, one end of the two opposite ends of the blades 11 must be close to the rotation axis of the swivel disc 1, and the other end is away from the rotation axis. The extension direction of the blades 11 refers to the direction in which the end close to the rotation axis of the swivel disc 1 extends towards the end away from the rotation axis of the swivel disc 1. The blades 11 may extend in a straight line, an arc, or a broken line. Regardless of their shape, the angle between the extension direction of the blades and the radial direction of the swivel disc 1 is not equal to 0°.

[0045] The surface of the blade 11 near the rotation axis of the spinning disc 1 is the working surface. When the spreader is in working condition, the drive unit 3 drives the spinning disc 1 to rotate in a fixed direction. The fixed direction matches the outer normal direction of the working surface, so that the working surface can push the material towards the rotation axis of the spinning disc 1.

[0046] The spreader also includes a material propulsion device (not shown), which is connected to the slinger 1.

[0047] Multiple blades 11 are provided. In one embodiment, the specific extension directions of the blades 11 may differ, that is, for one or more blades, the angle between its extension direction and the radial direction may be different from that of the other blades. In another embodiment, the specific extension directions of each blade 11 may be the same.

[0048] The rotating disc 1 rotates in a fixed direction that matches the outer normal direction of the working surface. The purpose of this rotation is to allow the working surface to push the material towards the axis of rotation. The fixed direction can be either clockwise or counterclockwise. Matching the fixed direction with the outer normal direction of the working surface means that the fixed direction and the outer normal direction of the working surface are in the same direction, or that the outer normal direction of the working surface follows the fixed direction. For example, if the fixed direction is clockwise and the outer normal direction of the working surface is clockwise, then they are matched.

[0049] During operation, the material pusher continuously feeds seeds, fertilizers, and other materials into the spinning disc 1, while simultaneously squeezing the material outwards radially, thus providing the material with a radially outward thrust within the disc 1. (Refer to...) Figure 10 As shown, the drive unit 3 drives the slinger 1 to rotate in a fixed direction. Since the working surface of the blade 11 faces the central axis of the slinger 1, and the fixed direction matches the outer normal direction of the working surface, when the slinger 1 rotates, the working surface can push the material towards the direction close to the rotation axis of the slinger 1, so that the material first gathers and fills the central area of ​​the slinger 1. Figure 10 The shaded area represents the filling effect of the material, and the arrows around the perimeter indicate the direction of material ejection. The material rotates within the throwing disc 1, and simultaneously, driven by the material propeller, it is radially extruded beyond the rotating area of ​​the blades 11. The extruded material then breaks free from the constraints of the blades 11 and, relying on inertia, flies out along the tangent of the throwing point of the throwing disc 1, thus achieving the purpose of spreading the material to the working area. Throughout the process, under the continuous action of the material propeller, newly entering material in the central area gradually flings the material near the outer periphery of the throwing disc 1 radially outward, ensuring continuous spreading.

[0050] In this embodiment, by designing the blades 11 at a specific angle and setting the rotation direction of the spinning disc 1 to a specific direction, the working surface of the blades 11 can push the material towards the center of the spinning disc 1 during operation. This makes the material distribution inside the entire spinning disc 1 more uniform, effectively reducing the situation where there is more material at the bottom than at the top of the disc. This achieves a more uniform distribution of material in the working area when the material is thrown out, effectively overcoming the problem of uneven material distribution in related technology spreading systems and improving the quality of spreading. Because the unevenness of material distribution within the spinning disc 1 is reduced, the problem of uneven material distribution in the final thrown material is also reduced. When the material leaves the constraint of the blades 11 and flies out tangentially, the amount of material on the left and right sides is more similar, improving the uniformity of material spreading in the working area. This helps to improve the effectiveness of plant protection operations, such as more uniform seed sowing which is beneficial to crop growth, and more uniform fertilizer spreading which better meets the nutritional needs of crops.

[0051] Currently, to address the issue of uneven dispersing by the spreader, some mechanisms symmetrically equip two spreaders with opposite rotation directions to solve the unevenness problem through symmetry. However, this approach, using two spreaders, is obviously more expensive and heavier, which is detrimental to loading more material onto drones with limited payload capacity. In contrast, this solution only requires a single spreader to achieve a more uniform dispersing effect. Its equipment is also less expensive and lighter, allowing for a greater weight of material carried by the drone in a single flight, thereby improving operational efficiency.

[0052] In one embodiment, the working surface is concave.

[0053] The concave surface can be formed as an arc-shaped concave surface, with a smooth curve without any sharp edges or protrusions, and the curvature matching the material's movement trajectory. Alternatively, it can be a bent surface composed of multiple flat plates connected at angles to each other. Specifically, the bent surface consists of two or more flat plates connected at a fixed angle, forming an inwardly concave structure. The connection points between the flat plates have controllable obtuse or rounded transitions. Both concave surface forms retain the core design that the angle between the extension direction of blade 11 and the radial direction of the throwing disc 1 is not equal to 0°. Only by changing the curvature of the working surface or the splicing method, the collaborative working logic with the original drive unit 3 and material propulsion device remains unchanged. The concave surface has a natural enveloping guiding characteristic. When the throwing disc 1 rotates, the material is continuously guided by the inner wall of the concave surface to the center of the concave surface (i.e., the direction of the rotation axis of the throwing disc 1). Compared to a planar working surface, the strong guiding property of the concave surface allows the material to fill the central area of ​​the throwing disc 1 faster and more densely, further weakening the gravity accumulation effect where there is more material at the bottom than at the top, making the material distribution more symmetrical before being thrown out.

[0054] Reference Figure 7Ideally, the working surface is a concave arc shape. When a concave arc shape is used, there are no sharp corners, which can avoid the accumulation of dust at sharp corners and has a good guiding and gathering effect on materials.

[0055] In one embodiment, reference is made to Figure 9 The working surface is a plane.

[0056] With this type of working surface, the blade 11 has a simpler structure and form, and lower cost.

[0057] In one embodiment, the working surface is a continuous arc-shaped concave surface; the side of the blade 11 closest to the rotation axis of the swivel disc 1 is the first side, and the side furthest from the rotation axis of the swivel disc 1 is the second side. Extending from the first side to the second side, the angle between the tangent direction of any point on the working surface and the radial direction of that point in the swivel disc 1 gradually decreases.

[0058] Specifically, the first side, closer to the rotation axis of the slinger 1, is the feed side where material enters the working surface of the blade 11. The second side, farther from the rotation axis of the slinger 1, is the discharge side where material exits after moving on the working surface. Extending from the first side (feed side) to the second side (discharge side), the angle between the tangent direction at any point on the working surface and the radial direction of the slinger 1 at that point continuously decreases. For example, referring to… Figure 7 The included angle ∠α at the first side may be 140°, ∠β at the middle position is 130°, and ∠γ at the second side is 125°. The entire working surface maintains a continuous arc shape without any breaks or sharp corners. While achieving a gradual change in included angle, it retains the core advantages of the arc concave surface, such as preventing dust accumulation and providing smooth guidance.

[0059] In this embodiment, the difference in the included angle at different radial positions is used to match the movement requirements of the material within the throwing disc 1. Specifically, the first side is close to the center of the throwing disc 1, where the angle between the tangent of the working surface and the radial direction is larger. This means that the opening width of the blade 11 in this area is wider, and the material pusher needs to squeeze the material outward radially. The wider opening reduces the material flow resistance, avoids material congestion on the feed side, and ensures that the material can quickly and smoothly enter the working surface of the blade 11, providing sufficient material for subsequent gathering and throwing. Conversely, as the material moves towards the second side (outer periphery of the throwing disc 1), the angle between the tangent of the working surface and the radial direction gradually decreases. The wrapping and guiding force of the blade 11 on the material is enhanced. The smaller angle allows the working surface to push the material more accurately towards the center of the throwing disc 1, preventing the material from prematurely detaching from the constraint due to centrifugal force when it approaches the outer periphery. This ensures that the material fully fills the central area before being thrown, further reducing the impact of material accumulation at the bottom.

[0060] This embodiment resolves the contradiction that a large angle is beneficial for feeding but results in weak aggregation, while a small angle is beneficial for aggregation but results in feeding blockage. It achieves the dual goals of preventing congestion on the feeding side and strong aggregation on the outer perimeter, simultaneously improving the flow efficiency and distribution uniformity of materials within the throwing disc 1. This allows materials to more fully fill the central area before being thrown out, reducing the distribution difference of more at the bottom and less at the top. At the same time, smooth feeding ensures a stable material supply, avoiding dispersal interruptions caused by material shortages or congestion, resulting in more uniform material distribution in both left-right and front-back directions.

[0061] In one embodiment, the working surface extends along an involute from the first side to the second side.

[0062] The geometric characteristics of the involute determine that the area near the reference circle (first side) has a large unfolding angle (corresponding to a large included angle) and a wide opening, which is conducive to material feeding by the material pusher; the area far from the reference circle (second side) has a small unfolding angle (corresponding to a small included angle) and strong wrapping, which is conducive to gathering materials.

[0063] Furthermore, the tangent direction of the involute is exactly the same as the linear velocity direction of the point where the material rotates around the axis of rotation. When the slinger 1 drives the blade 11 to rotate, the tangent direction of any point on the working surface is the same as the inertial motion direction of the material at that point. This means that when the material moves on the working surface, it will slide smoothly along the involute trajectory, avoiding material damage (such as seed breakage) or local accumulation caused by sudden changes in force.

[0064] In one embodiment, the side of the blade 11 closest to the rotation axis of the swivel disc 1 is the first side, and the cylindrical cavity formed by each first side is the feed chamber 14. The spreader also includes a material pusher for conveying material to the sling plate 1. The material pusher includes a conveying pipe that communicates with the feed chamber 14. When the spreader is in operation, the working surface pushes the material to gather towards the center of the feed chamber 14, and the material pusher pushes new material from the conveying pipe into the feed chamber 14.

[0065] The material pusher includes an auger installed inside the conveying pipe. When the auger rotates, it applies an axial thrust to the material inside, thereby continuously pushing the material in the conveying pipe into the feeding chamber 14 of the slinger 1. The material diffuses outward in the radial direction in the feeding chamber 14.

[0066] During operation, the material pusher delivers material to the feeding chamber 14 through the conveying pipe. Simultaneously, as the slinger 1 rotates, the working surface of the blades 11 continuously pushes the material entering the feeding chamber 14 towards its center, creating a dual effect of feeding and gathering. This dual effect allows the material to quickly and densely fill the entire feeding chamber 14. Because the feeding chamber 14 is cylindrical and located in the center, the material is evenly distributed within the chamber, preventing accumulation at the bottom and top due to gravity. Once the feeding chamber 14 is full, the material pusher continues to deliver new material. Under the extrusion force of the pusher, the new material exerts an outward pushing force on the existing "old material" within the feeding chamber 14. Affected by this pushing force, the material on the outer periphery of the feeding chamber 14 gradually breaks through the constraint of the first side of the blades 11 and diffuses towards the outer periphery of the slinger 1 (the area where the working surface of the blades 11 is located), entering a "waiting to be thrown out" state. The material diffused to the outer periphery of the throwing disc 1 will gain rotational speed as the disc 1 rotates. When it moves to the outer side of the second side of the blade 11, it will break free from the constraint of the blade 11 and be thrown outward along the tangential direction under its own inertia. At the same time, the material pusher continuously replenishes the material, and the feed chamber 14 is always kept full. The material on the outer periphery is continuously squeezed out and thrown out, forming a cycle of "filling-squeezing-throwing out", achieving uninterrupted continuous spreading.

[0067] In one embodiment, reference is made to Figures 7-9 The radius of the feed chamber 14 is the same as the inner diameter of the feed pipe.

[0068] If the radius of the feed chamber 14 does not match the inner diameter of the conveying pipe (e.g., the radius of the feed chamber 14 is smaller), a step will be formed at the junction of the two. When the material enters the feed chamber 14 from the conveying pipe, it will be blocked by the step, resulting in local accumulation, jamming, or even blockage of the conveying pipe outlet. In this embodiment, the feed chamber 14 is a cylindrical cavity, and its cross-sectional radius (i.e., the distance from the rotation axis of the swivel disc 1 to the first side of the blade 11) is equal to the inner diameter of the conveying pipe. The fact that the two are the same size eliminates the aforementioned step resistance. After the material flows out along the conveying pipe, it can directly and smoothly enter the feed chamber 14 without being stuck due to abrupt changes in the channel, ensuring that the conveying path is unobstructed throughout.

[0069] In one embodiment, the side of the blade 11 away from the rotation axis of the swivel disc 1 is the second side; with the rotation axis of the swivel disc 1 as a reference, the radius of the location of the second side is 1.5-2 times the radius of the location of the first side.

[0070] With the rotation axis of the spinning disc 1 as the origin, measure the distances (i.e., radii) from the first and second sides of the blade 11 to the origin, respectively. The ratio between the two sides is fixed within the range of 1.5-2. For example, if the radius of the first side is 5cm, the radius of the second side is 7.5-10cm.

[0071] The inertial velocity of the material is proportional to the radius of rotation at the point of ejection. The radius of the second side is 1.5-2 times that of the first side, allowing the material in the outer perimeter area to obtain sufficient centrifugal force to meet the requirements of spreading the material to the target working area. This prevents the material from being thrown out before it is fully gathered due to a path that is too short, and also prevents the material from remaining in the throwing disc for too long due to a path that is too long. If the ratio is less than 1.5 times, the centrifugal force is insufficient, the material is spread too close, and the gathering effect is poor. If it is greater than 2 times, the centrifugal force is too large, which can easily lead to the material being spread too far and a surge in energy consumption.

[0072] In one embodiment, the number of blades 11 is 5 to 8.

[0073] This number of blades 11 ensures a good material gathering effect while avoiding excessively dense blades 11 that could affect the discharge speed.

[0074] In one embodiment, reference is made to Figure 3 and Figure 6 The slinger 1 also includes a retaining ring 13. Along the axial direction of the slinger 1, the retaining ring 13 and the base 12 are respectively connected to two opposite sides of the blade 11. The center of the retaining ring 13 forms a feed hole 131 for communicating with the conveying pipe. Any two adjacent blades 11, together with the retaining rings 13 and the base 12 on both sides, form a material gathering cavity 15.

[0075] The slinger 1 mainly consists of blades 11, retaining rings 13, and a base 12. The retaining rings 13 and the base 12 are connected to opposite sides of the blades 11 along the axial direction of the slinger 1, forming a cage-like structure. This structure provides a stable frame for the slinger 1, allowing the blades 11 to maintain a relatively fixed position and shape during operation. A feed hole 131 is formed in the center of the retaining ring 13, which connects to a conveying pipe. The conveying pipe transports material to the feed hole 131, allowing it to enter the slinger 1, providing a clear channel for material entry. Any two adjacent blades 11, together with the retaining rings 13 and the base 12 on both sides, form a material-gathering cavity 15. This means that multiple material-gathering cavities 15 are formed in the slinger 1, evenly distributed around the feed cavity 14. These material-gathering cavities 15 form a radial channel connecting the feed cavity 14 internally and the external environment externally.

[0076] During operation, the material is conveyed through the feed pipe to the feed hole 131 at the center of the baffle ring 13, and then enters the inside of the spinning disc 1. Since the material gathering chamber 15 is connected to the feed chamber 14, the material is distributed into each material gathering chamber 15. During the rotation of the spinning disc 1, the working surface of the blades 11 applies an inward gathering force to the material, while the material inside is subjected to an outward extrusion force. The "cage-like" structure and the presence of the material gathering chambers 15 restrict the direction of material movement. The material can only move within the radial channel of the material gathering chamber 15 and cannot axially escape the rotation coverage of the blades 11. As the spinning disc 1 continues to rotate, the material gradually moves outward from the material gathering chambers 15 under the pressure of the new material inside and the centrifugal force of the rotating material itself. When the material reaches the outer periphery of the spinning disc 1, it breaks free from the constraints of the blades 11 and the baffle ring 13, and flies outward along the tangential direction of the spinning disc 1, thus achieving material spreading.

[0077] In this embodiment, the radial channel formed by the material-gathering chamber 15 prevents the material from axially leaving the rotational coverage area of ​​the blades 11 due to the inward gathering force of the blades 11 and the outward extrusion force of the internal material. This ensures that the material is always gathered within the effective range of the spinning disc 1, guaranteeing a stable gathering effect. This stable gathering effect helps the material to be evenly distributed within the spinning disc 1, and the material moves and gathers in an orderly manner within the material-gathering chamber 15, avoiding situations where there is too much or too little material in certain areas, thus providing a foundation for subsequent uniform spreading.

[0078] In one embodiment, the base 12 is a closed disc shape, and the outer diameter of the base 12 is equal to the outer diameter of the retaining ring 13.

[0079] The enclosed disc-shaped base 12 and the retaining ring 13 with the same outer diameter cooperate with each other, enhancing the overall structural strength of the slinger 1. During high-speed rotation, it can withstand greater centrifugal force and material impact force, reducing deformation and damage to the slinger 1, and improving the reliability and service life of the equipment. The regular structural design helps to reduce the unbalanced force generated by the slinger 1 during rotation, thereby reducing equipment vibration and noise. This not only improves the working environment but also reduces wear on other parts of the equipment.

[0080] In one embodiment, reference is made to Figure 3 The spreader also includes a material pusher for conveying material to the slinger 1, the material pusher including a conveying pipe communicating with the feed chamber 14; The slinger 1 also includes a retaining ring 13. Along the axial direction of the slinger 1, the retaining ring 13 and the base 12 are respectively connected to two opposite sides of the blade 11. The retaining ring 13 is located on the side of the blade 11 close to the conveying pipe. The center of the retaining ring 13 forms a feed hole 131 that communicates with the conveying pipe. The feed pipe is connected to a first protruding ring 232, which extends into the feed hole 131.

[0081] The first convex ring 232 can be an integral structure on the conveying pipe or a structure independent of the conveying pipe.

[0082] The first protruding ring 232 extends into the feed hole 131, which is equivalent to setting a sealing barrier in the connection channel between the conveying pipe and the spinning disc 1. When the material enters the spinning disc 1 through the feed hole 231 and the first protruding ring 232, the cooperation between the retaining ring 13 and the first protruding ring 232 prevents the material from leaking from the gap between the conveying pipe and the spinning disc 1, ensuring that all the material can enter the spinning disc 1 for spreading.

[0083] In this embodiment, the overlapping sealing structure of the retaining ring 13 and the first convex ring 232 effectively avoids material leakage in the connection channel between the conveying pipe and the spinning disc. This means that more material can be accurately conveyed to the spinning disc 1 for spreading, reducing material waste and improving material utilization. The leak-proof design reduces the risk of equipment jamming and malfunction due to material leakage. For example, it prevents material from entering the drive components of the spinning disc 1 or the friction area between the protective cover 2 and the spinning disc 1, reducing equipment wear and damage and extending the service life of the equipment.

[0084] In one embodiment, a second protruding ring 132 is provided on the side of the retaining ring 13 near the material pusher. The second protruding ring 132 is provided around the outer periphery of the first protruding ring 232, and the feed hole 131 is provided on the second protruding ring 132.

[0085] By providing a second convex ring 132 on the retaining ring 13, the overlap dimension between the first convex ring 232 and the retaining ring 13 in the axial direction can be effectively increased, thereby providing a better sealing and leak-proof effect.

[0086] In one embodiment, a protective cover 2 is also included, the swivel disc 1 is rotatably installed inside the protective cover 2, the material conveying pipe is connected to the protective cover 2, and the first protruding ring 232 is disposed on the inner side of the protective cover 2.

[0087] The first protruding ring 232 is set directly on the inner side of the protective cover 2. That is, the first protruding ring 232 is a structure independent of the material conveying pipe. During installation, the material conveying pipe can be directly connected to the outer wall of the protective cover 2 without extending the material conveying pipe into the protective cover 2 and the spinning disc 1. This facilitates installation and avoids the problem of the spinning disc 1 colliding with the material conveying pipe due to assembly errors.

[0088] In one embodiment, the spreader further includes a protective cover 2, the spinning disc 1 is rotatably mounted inside the protective cover 2, the drive unit 3 is mounted on one side of the protective cover 2, and the drive shaft extends into the protective cover 2 and is connected to the spinning disc 1.

[0089] Specifically, when some material is ejected from the spinning disc 1, due to the dynamic effect of the disc's rotation, this material carries an upward velocity component. Under normal circumstances, it would move along a parabolic trajectory, potentially colliding with the landing gear or propeller components above the drone. The protective cover 2, positioned above the spinning disc 1, forms a physical barrier. When material with an upward velocity component reaches the protective cover 2, it is intercepted, altering its trajectory and preventing it from continuing to impact the drone's critical components, thus ensuring the drone's safety during the dispersal operation.

[0090] The drive unit 3 is mounted on one side of the protective cover 2, which provides a stable support base to prevent the drive unit 3 from shifting position due to vibration. The drive shaft extends along a fixed direction into the protective cover 2 to connect to the spinning disc 1, ensuring that the drive shaft and the rotation axis of the spinning disc 1 are coaxial, reducing eccentric losses during power transmission and making the spinning disc 1 rotate more smoothly. Furthermore, the protective cover 2 integrates the spinning disc 1 and the drive unit 3 into a compact module, facilitating quick docking and installation with carriers such as drones and tractors, reducing assembly steps of scattered parts, and lowering the risk of component damage during transportation and storage.

[0091] In one embodiment, reference is made to Figure 3 and Figure 4 The protective cover 2 is provided with a feeding hole 231 that communicates with the material pusher, and the material pusher can push the material into the throwing disc 1 through the feeding hole 231.

[0092] The material feed hole 231 is located on the side of the protective cover 2 connected to the material pusher. Its diameter matches the outer diameter of the material pusher's feed pipe, ensuring no gaps after connection. Simultaneously, the axis of the feed hole 231 is aligned with the axis of the feed chamber 14 (center feed hole 131 of the retaining ring 13) of the slinger 1, forming a straight channel from the pusher to the feed hole 231 to the feed chamber 14. The end of the material pusher's feed pipe is fixedly connected to the protective cover 2 via clips, threads, or flanges, ensuring no relative displacement during drone flight or slinger 1 rotation, thus preventing material leakage. After the material pusher is activated, the auger pushes the material along the feed pipe. The material passes through the feed hole 231 on the protective cover 2 and directly enters the center feed hole 131 of the retaining ring 13 of the slinger 1, ultimately reaching the feed chamber 14.

[0093] If the protective cover 2 does not have a material conveying hole 231, an additional material conveying pipe needs to be built outside the protective cover 2 to connect to the feeding chamber 14. This can easily cause gaps due to multiple connections. In this embodiment, the design with a material conveying hole 231 integrates the channel into the protective cover 2, requiring only one connection, thus completely reducing material leakage points. This is especially suitable for fine particles or powdery materials.

[0094] In one embodiment, the protective cover 2 includes a first protective plate 22 and a second protective plate 23 arranged in parallel. The drive unit 3 is installed on the first protective plate 22. The second protective plate 23 is provided with a feeding hole 231 communicating with a material pusher. The material pusher can push the material into the sling plate 1 through the feeding hole 231.

[0095] The protective cover 2 includes a first protective plate 22 and a second protective plate 23 arranged in parallel, forming an installation space that allows the rotating disc 1 to operate. Furthermore, the first protective plate 22 and the second protective plate 23 also provide independent connection points for the drive unit 3 and the material conveying hole 231, respectively. The parallel arrangement of the first protective plate 22 and the second protective plate 23 makes full use of space, arranging the drive unit 3 and the material conveying hole 231 on different protective plates, making the internal structure of the equipment clearer and the installation and layout of each component more rational. The drive unit 3 and the material conveying system are independent of each other, reducing interference between them. The drive unit 3 can focus on providing stable power to the rotating disc 1, while the material conveying system ensures that the material accurately and smoothly enters the rotating disc 1, improving the overall operating efficiency and reliability of the equipment.

[0096] The drive unit 3 provides rotational power to the spinning disc 1. It may include components such as a motor and a transmission device. When the drive unit 3 is started, the motor transmits power to the spinning disc 1 through the transmission device (such as a belt, gear, etc.), causing the spinning disc 1 to start rotating at high speed.

[0097] From a kinematic perspective, the velocity vector of the material as it is thrown out from the edge of the throwing disc 1 is along the tangent of the circumference at the point of ejection, resulting in differentiated velocity components on the left and right sides. Taking the clockwise rotation of the throwing disc 1 as an example, the material thrown out from the left side generates an upward velocity component. Under inertia, this part of the material is prone to impacting the drone's landing gear or propeller components along a parabolic trajectory.

[0098] To overcome the above technical problems, in one embodiment, the protective cover 2 further includes a material guide 21 connected between the first protective plate 22 and the second protective plate 23. The material guide 21 is located above the throwing disc 1 and is used to block the material thrown upward.

[0099] The newly added guide component 21 is connected between the first guard plate 22 and the second guard plate 23, and is located above the swivel plate 1. The guide component 21 forms a shielding area above the swivel plate 1.

[0100] The drone's landing gear and propellers are critical components for flight and stability. Damage caused by material impact can affect the drone's flight balance and safety, and may even lead to flight accidents. The guide component 21 effectively prevents direct impact from upward-splashed material on the drone's landing gear and propellers, significantly reducing flight risks and extending the lifespan of these critical components.

[0101] The protective cover of the spreader in related technologies is mostly a semi-cylindrical or fan-shaped structure arranged around the throwing disc 1, covering the upper half of the throwing disc 1 to form a physical barrier. When the material thrown upward hits the protective cover, it will fall back due to momentum loss and fall back into the rotating area of ​​the throwing disc 1. However, this type of protective cover structure has significant technical defects: on the one hand, the falling material needs to be repeatedly flicked by the throwing disc 1, which reduces the system's energy utilization rate and increases the power consumption of the driving motor of the throwing disc 1; on the other hand, the falling material that cannot be thrown out in time will cause a certain degree of discharge congestion, significantly increasing the risk of material blockage.

[0102] To overcome the above technical problems, refer to Figures 11-14 In the spreader provided in this embodiment, the rotation axis of the spinning disc 1 is used as the dividing reference. One side of the left and right sides of the spinning disc 1 is the rising part 101, and the other side is the falling part 102. In the horizontal direction, the direction from the falling part 102 to the rising part 101 is the first horizontal direction. The guide component 21 includes a first guide plate 211, one end of which is close to the edge of the rising part 101, and the other end extends upward in the first horizontal direction.

[0103] by Figure 11 Taking the scheme shown as an example, the spinning disc 1 rotates clockwise. Taking the rotation axis of the spinning disc 1 as the dividing reference, the left part of the spinning disc 1 is the rising part 101, and the right part is the falling part 102. The first horizontal direction is from right to left.

[0104] During rotation, the rising section 101 imparts an upward velocity component to the material, while the descending section 102 causes the material to move downwards. The first guide plate 211 is a plate-shaped structure with one end close to the edge of the rising section 101 and the other end extending away from the throwing disc 1. The position and extension direction of the first guide plate 211 are related to the movement of the throwing disc 1 and the direction of material ejection, so that the first guide plate 211 can effectively guide the material ejected by the rising section 101.

[0105] Specifically, one end of the first guide plate 211 is close to the edge of the riser 101. When the material ejected by the riser 101 has an upward velocity component, it will collide with the first guide plate 211. Since the other end of the first guide plate 211 extends upward in a first horizontal direction, according to the principles of force decomposition and kinematics, the material's direction of motion changes after impacting the first guide plate 211. The material will move along the extension direction of the first guide plate 211, instead of falling back into the rotating area of ​​the slinger 1 as in the case of the shield in related technologies. This guiding method allows the material to be directly guided horizontally, avoiding the material from flying directly upward and hitting the drone's landing gear and propellers, while also preventing repeated collisions between the material and the slinger 1, reducing kinetic energy consumption. At the same time, because the material is guided in a specific direction, the risk of material blockage is reduced.

[0106] In summary, in this embodiment, by guiding the material thrown out by the rising part 101 through the first guide plate 211, the material is prevented from falling back into the rotating area of ​​the throwing disc 1 and being repeatedly struck. This eliminates the need for the throwing disc 1 to provide additional kinetic energy for the falling material, thereby improving the overall energy utilization rate of the system. For example, with the same motor power, more energy can be used to effectively throw out and spread the material, rather than being wasted on ineffective collisions between the material and the throwing disc 1. Due to the improved energy utilization rate of the system, the drive unit 3 does not need to provide excessive energy to maintain the rotation of the throwing disc 1 and the spreading of the material. This extends the service life of the motor and reduces energy consumption, resulting in significant economic benefits for spreaders that require long-term operation.

[0107] Furthermore, the first guide plate 211 changes the movement trajectory of the material, preventing the material from falling back onto the throwing disc 1, reducing the risk of material blockage, making the spreader more stable and reliable during operation, reducing equipment failures and downtime caused by material blockage, and improving operating efficiency. Users can carry out large-area spreading operations with greater confidence without worrying about frequent equipment failures affecting the operation progress.

[0108] In one embodiment, one end of the first guide plate 211 is close to the edge of the upper half of the rising part 101.

[0109] The first guide plate 211 is close to the upper edge of the rising part 101, which can guide the material as soon as it gains upward kinetic energy. This avoids energy loss and material dispersion caused by the material colliding with other parts after moving upward a certain distance, so that the material can be guided horizontally to a greater distance and the spreading range can be widened.

[0110] Furthermore, the end of the first guide plate 211 is close to the upper half of the rising part 101, which allows more material thrown out by the rising part 101 on the left side to be guided to the left side area, avoiding too little material on the left side and improving the uniformity of the left and right spreading distribution.

[0111] In one embodiment, the height of the end of the first guide plate 211 close to the rising part 101 is set to ¼ to 1 of the total height of the upper half of the rising part 101.

[0112] The inventors discovered that in the descending section 102 on the right, the material ejected from the upper part of the descending section 102 has a rightward velocity component and eventually lands on the right. The material ejected from the lower part of the descending section 102 has a leftward velocity component, but because the material ejected from the descending section 102 has a downward velocity component and is closer to the ground, its flight time in the air is short, allowing it to reach the ground and stop flying more quickly. Therefore, the distance it can fly to the left is shorter, resulting in more material actually remaining in the right side area of ​​the dispenser. In contrast, in the ascending section 101 on the left, the material ejected from the upper part of the ascending section 101 has upward and rightward velocities, and the material in the upper part of the ascending section 101 is at a higher position. This allows the material ejected from the ascending section 101 to have a longer flight time in the air, meaning that this part of the material can ultimately fly a greater distance to the right, and more material actually remaining in the right side area of ​​the dispenser. Therefore, in general, without the interference guidance of the first guide component 211, the most likely spreading result is that there is more material on the right side than on the left side.

[0113] In this embodiment, the starting point of the first guide plate 211 is set at more than ¼ of the total height of the rising part 101. This can intercept the material on the left side that would originally fly to the right and guide it to be thrown to the left, so that the material is added to the left area. This solves the problem of more material on the right side than on the left to a certain extent and achieves the effect of balancing the uniformity of the left and right spreading.

[0114] In one embodiment, the height of the end of the first guide plate 211 close to the rising part 101 is set to ¼ to ½ of the total height of the upper half of the rising part 101.

[0115] Specifically, taking the left side as the rising section 101 and the right side as the descending section 102 as an example, in the lower half of the descending section 102 on the right, the rotating disc 1 gives the material a downward velocity. Simultaneously, due to the continuous rotation of the disc 1, the material also has a leftward velocity component. This is because when the disc 1 rotates, each point on its surface has a tangential velocity. When the material in the lower half of the descending section 102 detaches from the disc 1, it inherits this tangential velocity, thus forming a leftward velocity component. Ultimately, in addition to moving downwards, this part of the material also shifts to the left, causing some material to fall into the left-side area.

[0116] Conversely, in the upper half of the left rising part 101, the rotation of the sling plate 1 gives the material an upward speed. Also based on the rotational characteristics of the sling plate 1, the material also has a rightward component speed. When the material is thrown out from the upper half of the rising part 101, it will deflect to the right while moving upward.

[0117] The first guide plate 211 is positioned approximately half the total height of the upper half of the riser 101. This arrangement allows some material that is thrown upwards and to the right to be retained above the first guide plate 211. The description of "upwards and to the right" needs to be considered in conjunction with the overall motion analysis. In reality, within the upper half of the riser 101, the main movement trend of the material is upwards and to the right. This portion of material avoids the guidance of the first guide plate 211; that is, under the influence of its own motion characteristics, it ultimately fills the right-hand area.

[0118] In this embodiment, considering that the material thrown out by the lower half of the descending part 102 will fall into the left area, and the material thrown out by the ascending part 101 located below the first guide plate 211 will be blocked in the left area, if the starting point of the first guide plate 211 is set too high, the amount of material spread in the right area may be relatively small. The reasonable setting of the connection height between the first guide plate 211 and the ascending part 101 is less than half the total height of the upper half of the ascending part 101, which retains the material to be supplemented to the right area, can ensure the amount of material in the right area, make the amount of material spread on the left and right sides more balanced, and thus improve the uniformity of the right spread distribution.

[0119] In addition, in practical applications, the amount of material ultimately distributed to the left and right sides can be controlled by appropriately adjusting the height of the end of the first guide plate 211 close to the rising part 101. Specifically, while keeping the gap between the end of the first guide plate 211 and the edge of the rising part 101 unchanged, when the height of the end of the first guide plate 211 close to the rising part 101 is higher, more material ejected from the rising part 101 will be intercepted by the first guide plate 211 and guided to the left side, while the material ejected from the area above the first guide plate 211 will eventually fly to the right side of the slinger 1 due to its own rightward velocity component. Therefore, when the material on the left side is relatively less than that on the right side due to the cooperation of the material propulsion device, the protective cover 2, the slinger 1, or the flight attitude of the drone and other factors, the first guide plate 211 can be offset upward relative to the slinger 1 to increase the amount of material intercepted and guided to the left by the first baffle plate, so that more material can be ejected to the left. Conversely, when there is more material on the left side than on the right side, the height of the first guide plate 211 is reduced to decrease the amount of material intercepted by the first guide plate 211 and guided to the left side.

[0120] In one embodiment, the gap between the end of the first guide plate 211 close to the rising part 101 and the sling plate 1 is 2~8mm.

[0121] By controlling the gap between the edge of the first guide plate 211 and the rising part 101 to be 2~8mm, sufficient safety space can be reserved for the rotation of the slinger 1, avoiding friction and collision between the rotating slinger 1 and the first guide plate 211. It can also effectively separate and intercept materials, ensuring that materials flying out from the area below the first guide plate 211 can be intercepted and guided horizontally by the first guide plate 211.

[0122] Additionally, the amount of material ultimately distributed to the left and right sides can be controlled by adjusting the gap between the edge of the first guide plate 211 and the rising part 101, such as... Figure 14 As shown, when the material on the right side is relatively less than that on the left due to the coordination of the material propulsion unit, protective cover 2, and slinger 1, or due to the flight attitude of the UAV and other factors, the first guide plate 211 can be offset to the left relative to the slinger 1, increasing the gap between the first guide plate 211 and the slinger 1. This reduces the amount of material intercepted by the first baffle plate and guided to the left, allowing more material to pass through the gap and be ejected to the right. Conversely, when the material on the left side is relatively less than that on the right side, the gap between the first guide plate 211 and the slinger 1 is reduced, allowing more material to be intercepted by the first guide plate 211 and guided to the left.

[0123] Preferably, the gap between the end of the first guide plate 211 close to the rising part 101 and the sling plate 1 is 2~4mm.

[0124] In one embodiment, the guide member 21 further includes a second guide plate 212, one end of which is close to the edge of the rising part 101, and the other end extends upward in a second horizontal direction, which is opposite to the first horizontal direction.

[0125] One end of the second guide plate 212 is close to the edge of the rising part 101, which can promptly capture part of the material thrown out from the rising part 101. Since the second guide plate 212 extends upward in a second horizontal direction opposite to the first horizontal direction, when the material comes into contact with the second guide plate 212, it will be guided by the second guide plate 212, causing the material to fly out along the extending direction of the second guide plate 212. Specifically, refer to... Figure 11 The first guide plate 211 extends to the left, which can guide the material to fly out to the left; the second guide plate 212 extends to the right, which can guide the material to fly out to the right. That is, the material flying out of the area above the lower edge of the second guide plate 212 in the rising part 101 can be guided to the right side, which avoids the material flying directly upward and hitting the landing gear or propeller of the drone, and also avoids the material falling back into the tossing disc 1.

[0126] In one embodiment, the first guide plate 211 and the second guide plate 212 are connected at the ends near the rising part 101.

[0127] The structure connecting the first guide plate 211 and the second guide plate 212 provides a relatively stable transition channel for the material. When the material enters the guiding system from the rising part 101 of the sling plate 1, the connecting end can orderly divert the material and guide it out separately. This avoids the problem of a blind zone between the first guide plate 211 and the second guide plate 212, which would cause some material to fall back into the sling plate. This basically ensures that most of the material can be guided out, reducing the possibility of material accumulation and blockage.

[0128] Furthermore, the first guide plate 211 and the second guide plate 212 are connected at their ends near the rising part 101, which enhances the overall integrity of the guiding system. This connection method allows the two guide plates to support each other when under force, reducing the risk of deformation or damage to a single guide plate due to uneven force, thereby improving the reliability and service life of the guiding system.

[0129] In one embodiment, the lower surface of the first guide plate 211 and / or the second guide plate 212 is a continuous arc-shaped concave surface.

[0130] The continuous arc-shaped concave surface design can prevent materials from accumulating and clogging on the guide plate, allowing materials to flow smoothly along the arc-shaped concave surface, ensuring the smooth operation of the guiding system and improving the operating efficiency of the equipment.

[0131] In one embodiment, the end of the first guide plate 211 and / or the second guide plate 212 away from the swivel plate 1 tends to extend in a horizontal direction.

[0132] That is, the tangent direction of the end of the first guide plate 211 and / or the second guide plate 212 away from the sling plate 1 tends to be horizontal. Preferably, the angle between the tangent direction of this end and the horizontal direction is -10° to 10°.

[0133] The material is thrown out from the rising part 101 of the throwing disc 1. When the material comes into contact with the first guide plate 211 or the second guide plate 212, it begins to be constrained and guided by the guide plate. As the end of the guide plate away from the throwing disc 1 tends to extend horizontally, the speed of the material in the vertical direction gradually decreases and the speed in the horizontal direction gradually stabilizes. This is because the components of the support force and friction force of the guide plate on the material in the vertical and horizontal directions have changed, which makes the motion state of the material change from inclined upward to stable motion in an approximately horizontal direction. This prevents the material from flying upward and hitting the landing gear or propellers of the drone, while allowing the material to fly a greater horizontal distance and obtain a wider spreading range.

[0134] The inventors further discovered that the horizontal component of the material thrown upwards near the bottom of the spinning disc 1 has a relatively large velocity. Since this portion of the material is also thrown upwards to some extent, it ultimately causes the material to reach the drone's landing gear or propellers at a considerable distance from the spinning disc 1. To solve this problem, a straightforward approach is to increase the size of the guide plate, extending it horizontally relative to the spinning disc 1 to provide a larger shielding area. However, a large guide plate creates a long cantilever structure, leading to decreased overall structural stability. For example, the high-speed rotation of the spinning disc 1 generates significant vibrations, which are amplified by the long cantilever guide plate. Furthermore, a large guide plate is more expensive and increases the risk of impact during flight.

[0135] Therefore, in the spreader provided in this embodiment, reference is made to Figure 11 The guide member 21 further includes a third guide plate 213, which is spaced below the first guide plate 211. One end of the third guide plate 213 is close to the edge of the lower half of the rising part 101, and the other end extends upward in the first horizontal direction.

[0136] The third guide plate 213 is spaced below the first guide plate 211. This spaced arrangement makes full use of the space and avoids interference with the first guide plate 211. One end of the third guide plate 213 is close to the edge of the lower half of the rising part 101, which can capture the material that is thrown upward from the bottom of the throwing plate 1 with a large horizontal velocity at close range and in a timely manner, and guide and control this part of the material from the source. The other end of the third guide plate 213 extends upward in the first horizontal direction. After the material is thrown out from the bottom of the throwing plate 1, it has a certain upward and horizontal velocity. The upward extension of the third guide plate 213 can better receive and guide the material, so that it moves in the expected direction, preventing the material from flying directly to the landing gear or propellers of the drone. At the same time, it can also guide the material horizontally to prevent the material from falling back into the throwing plate 1.

[0137] The presence of the third guide plate 213 acts as a barrier in the material's flight path below, limiting the horizontal flight distance and ensuring that the material is intercepted and guided at a closer distance. Furthermore, by rationally designing the length and extension angle of the third guide plate 213, the material's flight range can be precisely controlled, ensuring that the material is accurately distributed to the target area.

[0138] In this embodiment, compared to the large-sized long cantilever guide plate, the third guide plate 213 is relatively small and has a more rational structure. It does not form a long cantilever structure, therefore it is less sensitive to vibrations generated by the rotation of the spinning disc 1, effectively reducing the amplification effect of vibrations. This makes the spreader more stable during high-speed rotation, improving the overall flight safety and reliability of the UAV. Furthermore, the smaller size of the third guide plate 213 requires less material, thus reducing raw material costs. The smaller third guide plate 213 significantly reduces the probability of collisions with surrounding objects during UAV flight. Even in the event of a minor collision, its simple structure and light weight have minimal impact on the UAV's flight status.

[0139] The inventors further discovered that because the guide plate can guide the material horizontally away from the throwing disc 1, it converts the material's original vertical upward momentum into horizontal momentum, ultimately resulting in a greater horizontal velocity component and a longer horizontal distance for the material. This leads to a phenomenon where more material lands further away from the throwing disc 1, and less material lands closer to it, thus exhibiting the problem of more material being scattered further away than closer.

[0140] The third guide plate 213 added below the first guide plate 211 in this embodiment can come into closer contact with some of the material flying out from the bottom of the slinger 1. The third guide plate 213 can apply a downward pressure to this part of the material, pressing the material that was originally flying upward and far away to the near. This close-range pressing action effectively controls the flight trajectory of the bottom material and increases the amount of material at the near distance.

[0141] The third guide plate 213 and the first guide plate 211 above form a synergistic effect of layered guidance. The first guide plate 211 can guide some of the material to a distance to achieve a larger spreading range; while the third guide plate 213 focuses on controlling the material at the bottom and guiding it to a closer position. The two work together to make the distribution of the material in the near and far directions more reasonable. That is, through the synergistic effect of the third guide plate 213 and the first guide plate 211, this embodiment achieves the effect of enhancing the uniformity of the near and far distribution of spreading.

[0142] Similarly, the second guide plate 212 extending along the second horizontal direction has the main function of guiding the material out along a specific second horizontal direction. Although this guiding method can effectively prevent the material from hitting the drone landing gear and propellers above, and can also prevent the material from falling back into the throwing disc 1, it has obvious defects: because it can only guide the material to fly to a relatively far distance, it lacks control over the distribution of the material in the near direction, which can easily lead to the problem of more material in the far direction and less material in the near direction.

[0143] In response to this, in one embodiment, reference is made to Figure 12 The guide component 21 further includes a fourth guide plate 214, which is disposed between the slinger 1 and the second guide plate 212. The fourth guide plate 214 extends in the same direction as the inclination direction of the second guide plate 212.

[0144] In this embodiment, the fourth guide plate 214 is positioned between the throwing disc 1 and the second guide plate 212. It is located on the initial flight path of the material after it is thrown from the throwing disc 1, enabling timely intervention and guidance of the material. By placing the second guide plate 212 at this crucial position, the flight trajectory of the material can be controlled more effectively, preventing unreasonable distribution of the material during flight. The fourth guide plate 214 extends in the same direction as the inclination of the second guide plate 212, allowing it to work in synergy with the second guide plate 212 to guide the material horizontally, preventing it from falling back into the throwing disc 1, while also supplementing and controlling the nearby distribution of the material.

[0145] Specifically, the fourth guide plate 214 guides materials thrown from or near the bottom of the throwing disc 1 at close range. When these materials come into contact with the fourth guide plate 214, the fourth guide plate 214 changes the flight direction of the materials, causing them to fly closer. By reasonably designing the tilt angle and length of the fourth guide plate 214, the flight distance and distribution range of the materials at close range can be precisely controlled, increasing the amount of materials at close range. The second guide plate 212 is mainly responsible for guiding materials to a longer distance, while the fourth guide plate 214 focuses on controlling the materials at close range. The two work together to form a layered guidance mechanism. This layered guidance method can reasonably distribute materials to different distance ranges according to the flight characteristics of the materials and operational needs, thereby achieving a uniform distribution of materials in both near and far directions. That is, by setting the fourth guide plate 214, this embodiment effectively solves the problem of more materials at far distances and less at close ranges caused by the second guide plate 212, making the material coverage in the entire spreading area more uniform and improving the operational effect and quality.

[0146] To address the issue of uneven material distribution under the guidance of the first guide plate 211 and the second guide plate 212, refer to... Figure 11 or Figure 13 In another embodiment, the lower surface of the first guide plate 211 and / or the second guide plate 212 is provided with a material blocking protrusion 215. When the spreader is working, the material blocking protrusion 215 is used to shorten the distance that the material hitting it is thrown horizontally relative to the throwing disc 1.

[0147] The material-stopping protrusion 215 protrudes from the lower surface of the first guide plate 211 and / or the second guide plate 212. Its shape can be designed according to actual needs, such as a long strip protrusion, a hemispherical protrusion, or an irregularly shaped block. The material-stopping protrusion 215 is integrally formed with the guide plate or fixed to the lower surface of the guide plate by welding, bolting, or other methods. The integral forming method can ensure the integrity and strength of the structure, while welding or bolting facilitates the replacement and adjustment of the material-stopping protrusion 215 to adapt to different operational needs.

[0148] Specifically, when the spreader is working, some material will strike the deflector protrusion 215. At the moment of collision, an interaction force will be generated between the material and the deflector protrusion 215. This force will change the momentum direction of the material. That is, the material that was originally flying forward along the direction of the guide plate will change its flight direction after colliding with the deflector protrusion 215. Some of its momentum will be converted into momentum in other directions or downwards, thereby shortening the distance the material is thrown horizontally relative to the throwing disc 1. In addition, the collision process will also cause energy loss of the material. When the material collides with the deflector protrusion 215, some of its kinetic energy will be converted into internal energy and other forms of energy, which will reduce the speed of the material. The reduction in speed will directly lead to a shorter flight distance of the material in the horizontal direction, and more material will stay in the area closer to the throwing disc 1.

[0149] In this embodiment, by setting the material-blocking protrusion 215, some of the material that would have flown far away is blocked and its flight direction is changed, which significantly increases the amount of material in the near area and makes the material distribution more even in the near and far ranges of the entire spreading area, thus improving the quality and effect of the operation.

[0150] Different operational scenarios have different requirements for the distribution of materials at different distances. For example, in the sowing of some crops that require dense planting, more material may be needed nearby; while in large-area uniform sowing operations, it is necessary to ensure that the distribution of materials at different distances and nearby areas is relatively balanced. By adjusting the position, shape and number of the material blocking protrusions 215, these diverse operational needs can be flexibly met.

[0151] In one embodiment, reference is made to Figure 11 The guide component 21 includes a first guide plate 211, a second guide plate 212 and a third guide plate 213. The lower surface of the second guide plate 212 is provided with a material blocking protrusion 215.

[0152] In this embodiment, the first guide plate 211 is directly set on the side of the rising part 101 facing away from the falling part 102, without interfering with the sling plate 1. The space within this range is larger, so it is easy to add a third guide plate 213 on this side. Moreover, the third guide plate 213 can block the material flying obliquely upward nearby, which is beneficial to shorten the length of the third guide plate 213, alleviate the problem of long cantilever, and can also guide the material in layers to improve the uniformity of the material distribution at different distances.

[0153] In contrast, one end of the second guide plate 212 is close to the rising part 101, and the other end extends along the second horizontal direction. Specifically, a large section of it directly covers the top of the spinning disc 1, so from the perspective of the entire spreader, the cantilever it forms is relatively short. In addition, the space between the second guide plate 212 and the spinning disc 1 is quite congested, making it difficult to install the fourth guide plate 214. Therefore, a baffle protrusion 215 is provided on the lower surface of the second guide plate 212 to change the distance of some material flying horizontally, which can meet the requirement of improving the uniformity of material distribution at different distances. At the same time, the installation cost of the baffle protrusion 215 is lower than that of installing the fourth baffle plate.

[0154] In one embodiment, the material-blocking protrusion 215 is configured in a hemispherical shape, and the lower surface of the first guide plate 211 and / or the second guide plate 212 is provided with one or more material-blocking protrusions 215 at intervals.

[0155] The hemispherical shape allows the force on the retaining protrusion 215 to be distributed more evenly across the entire curved surface when impacted by material. Compared with some shapes where local stress is concentrated (such as a pointed cone), this uniform force distribution can reduce the risk of damage to the retaining protrusion 215 due to excessive local stress and extend its service life.

[0156] When material impacts the hemispherical retaining protrusion 215 at a certain velocity, according to the principle of force interaction, the material will experience a reaction force from the curved surface. The direction of this reaction force is related to the position and angle at which the material impacts the curved surface, causing a change in the material's flight direction. For example, if the material impacts the top of the hemispherical protrusion perpendicularly, it may rebound in the opposite direction to its original flight direction; if the material impacts the side at a certain angle, it will change its flight direction at the corresponding angle, scattering into the surrounding area, thereby increasing the distribution of nearby material.

[0157] Whether installed singly or at intervals, the hemispherical material-blocking protrusions 215 effectively shorten the distance the material is thrown horizontally relative to the throwing disc 1, increasing the amount of material in the vicinity. In practical applications, by rationally designing and adjusting the parameters of the material-blocking protrusions 215, the distribution of material in both near and far directions can be made more balanced. When multiple material-blocking protrusions 215 are set, in addition to improving the near-far distribution, the lateral distribution of the material can also be optimized. Material-blocking protrusions 215 at different positions can guide the material to spread in different directions, so that the material can more evenly cover the entire spreading area on the horizontal plane.

[0158] In one embodiment, the first guard plate 22 and the second guard plate 23 are respectively fixedly connected to both sides of the guide member 21 by connectors.

[0159] The first guard plate 22 and the second guard plate 23 are independent components, and are respectively fixedly connected to both sides of the guide member 21 by connectors (such as bolts, nuts, clips, etc.). This connection method makes the installation and disassembly of each guard plate relatively independent and does not affect each other. For example, during installation, the first guard plate 22 can be accurately fixed to one side of the guide member 21 by connectors, and then the second guard plate 23 can be fixed to the other side in the same way.

[0160] When the guard plate is damaged or needs replacement, since the guard plate and the guide component 21 are independently connected via connectors, the damaged guard plate can be easily disassembled and a new guard plate installed without requiring large-scale disassembly or modification of the guide component 21. This significantly shortens equipment maintenance time and reduces maintenance costs. Furthermore, this connection method allows for greater flexibility in the design and manufacturing of the guard plate and guide component 21. The guard plate can be designed with different shapes, sizes, and materials according to different usage requirements and material characteristics, while the guide component 21 can also be independently optimized.

[0161] In another embodiment, refer to Figure 4 One of the first guard plate 22 and the second guard plate 23 is integrally formed with the guide member 21, and the other is fixedly connected to the guide member 21 through a connector.

[0162] One of the first guard plate 22 and the second guard plate 23 (e.g., the first guard plate 22) and the guide component 21 are integrally molded. This means that they are formed in one step using the same process or material during manufacturing, exhibiting integrity and continuity. The integral molding structure can eliminate gaps and stress concentration problems that may exist at the connection points, improving the strength and reliability of the component. For example, an integral structure of the plastic guide component 21 and the guard plate manufactured using injection molding can achieve a seamless connection between the guard plate and the guide component 21, reducing the possibility of material leakage.

[0163] The other (such as the second guard plate 23) is fixedly connected to the guide plate 21 by connectors (such as bolts, nuts, clips, etc.). This combination method not only utilizes the advantages of the one-piece molding structure, but also retains the flexibility of the connection method, which facilitates the disassembly and assembly of the internal sling plate 1.

[0164] In one embodiment, when the spreader is in operation, the rotation plane of the swivel disc 1 is in a vertical position.

[0165] The rotating plane of the spinning disc 1 is in a vertical orientation, meaning it is perpendicular to the horizontal plane. However, it is not limited to a perfectly vertical orientation. If the rotating plane of the spinning disc 1 is tilted to a certain extent, but generally inclined towards verticality, it also falls under the category of a vertical orientation. For example, if a perfectly vertical orientation is defined as 0°, then a spinning disc with its rotating plane in the range (-45°, 45°) also falls under the category of a vertical orientation.

[0166] On the other hand, an unmanned seeding device is provided, including an unmanned vehicle and the aforementioned seeder mounted on the unmanned vehicle.

[0167] Among these, unmanned vehicles can be drones, unmanned vehicles, etc. They can drive spreaders to move in the field and complete tasks such as automatically spreading fertilizer and seeds.

[0168] Similarly, based on the spreader in this embodiment, the unmanned spreading equipment provided in this embodiment has the advantage of high uniformity of spreading effect.

[0169] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, 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. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0170] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0171] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0172] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A spreader, characterized in that, It includes a drive unit (3) and a slinger (1); The drive shaft of the drive unit (3) is connected to the swivel disc (1); The swivel disc (1) includes a base (12) and a plurality of blades (11) connected to the base (12). The plurality of blades (11) are arranged at intervals around the rotation axis of the swivel disc (1). The angle between the extension direction of the plurality of blades (11) and the radial direction of the swivel disc (1) is not equal to 0°. Among them, the surface of the blade (11) near the rotation axis of the spinning disc (1) is the working surface. When the spreader is in working state, the drive unit (3) drives the spinning disc (1) to rotate in a fixed direction. The fixed direction matches the outer normal direction of the working surface so that the working surface can push the material in a direction close to the rotation axis of the spinning disc (1).

2. The spreader according to claim 1, characterized in that, The working surface is a continuous arc-shaped concave surface; the side of the blade (11) closest to the rotation axis of the sling disk (1) is the first side, and the side furthest from the rotation axis of the sling disk (1) is the second side. Extending from the first side to the second side, the angle between the tangent direction of any point on the working surface and the radial direction of that point in the swivel disc (1) gradually decreases.

3. The spreader according to claim 2, characterized in that, The working surface extends along an involute from the first side to the second side.

4. The spreader according to claim 1, characterized in that, The side of the blade (11) near the rotation axis of the swivel disc (1) is the first side, and the cylindrical cavity formed by each first side is the feed chamber (14). The spreader also includes a material pusher for conveying material to the slinger (1), the material pusher including a conveying pipe communicating with the feed chamber (14); when the spreader is in working state, the working surface pushes the material to gather towards the center of the feed chamber (14), and the material pusher pushes new material from the conveying pipe into the feed chamber (14).

5. The spreader according to claim 4, characterized in that, The radius of the feed chamber (14) is the same as the inner diameter of the feed pipe.

6. The spreader according to claim 5, characterized in that, The side of the blade (11) away from the rotation axis of the swivel disc (1) is the second side; with the rotation axis of the swivel disc (1) as the reference, the radius of the position of the second side is 1.5-2 times the radius of the position of the first side.

7. The spreader according to claim 5, characterized in that, The slinger (1) also includes a retaining ring (13). Along the axial direction of the slinger (1), the retaining ring (13) and the base (12) are respectively connected to the two opposite sides of the blade (11). The center of the retaining ring (13) forms a feed hole (131) for communicating with the feed pipe. Any two adjacent blades (11) together with the retaining ring (13) and the base (12) on both sides form a material gathering cavity (15).

8. The spreader according to claim 7, characterized in that, The base (12) is a closed disc, and the outer diameter of the base (12) is equal to the outer diameter of the retaining ring (13).

9. The spreader according to claim 1, characterized in that, It also includes a material pusher for conveying material to the sling (1), the material pusher including a conveying pipe communicating with the feed chamber (14) of the sling (1); The slinger (1) also includes a retaining ring (13). Along the axial direction of the slinger (1), the retaining ring (13) and the base (12) are respectively connected to two opposite sides of the blade (11). The retaining ring (13) is located on the side of the blade (11) close to the conveying pipe. The center of the retaining ring (13) forms a feed hole (131) that communicates with the conveying pipe. The feed pipe is connected to a first protruding ring (232), which extends into the feed hole (131).

10. The spreader according to claim 9, characterized in that, A second protruding ring (132) is provided on the side of the retaining ring (13) near the material pusher. The second protruding ring (132) is provided around the outer periphery of the first protruding ring (232), and the feed hole (131) is provided on the second protruding ring (132).

11. The spreader according to claim 10, characterized in that, It also includes a protective cover (2), the swivel disc (1) is rotatably installed inside the protective cover (2), the material conveying pipe is connected to the protective cover (2), and the first convex ring (232) is disposed on the inner side of the protective cover (2).

12. The spreader according to claim 1, characterized in that, It also includes a protective cover (2), the swivel disc (1) is rotatably installed inside the protective cover (2), the drive unit (3) is installed on one side of the protective cover (2), and the drive shaft extends into the protective cover (2) and is connected to the swivel disc (1).

13. The spreader according to claim 12, characterized in that, The protective cover (2) is provided with a feeding hole (231) that communicates with the material pusher. The material pusher can push the material into the slinger (1) through the feeding hole (231).

14. The spreader according to claim 12, characterized in that, The protective cover (2) includes a first protective plate (22) and a second protective plate (23) arranged in parallel. The drive unit (3) is installed on the first protective plate (22). The second protective plate (23) is provided with a feeding hole (231) communicating with the material pusher. The material pusher can push the material into the sling plate (1) through the feeding hole (231).

15. The spreader according to claim 14, characterized in that, The protective cover (2) also includes a material guide (21) connected between the first protective plate (22) and the second protective plate (23). The material guide (21) is located above the throwing disc (1) and is used to block the material thrown upward.

16. The spreader according to claim 15, characterized in that, With the rotation axis of the spinning disc (1) as the dividing reference, one side of the left and right sides of the spinning disc (1) is the rising part (101), and the other side is the falling part (102); in the horizontal direction, the direction from the falling part (102) to the rising part (101) is the first horizontal direction. The guide member (21) includes a first guide plate (211), one end of which is close to the edge of the rising part (101), and the other end extends upward in the first horizontal direction.

17. The spreader according to claim 16, characterized in that, One end of the first guide plate (211) is close to the edge of the upper half of the rising part (101).

18. The spreader according to claim 16, characterized in that, The guide member (21) further includes a second guide plate (212), one end of which is close to the edge of the rising part (101), and the other end extends upward in a second horizontal direction, which is opposite to the first horizontal direction.

19. The spreader according to claim 18, characterized in that, The first guide plate (211) and the second guide plate (212) are connected to the ends near the rising part (101).

20. The spreader according to claim 18, characterized in that, The lower surface of the first guide plate (211) and / or the second guide plate (212) is a continuous arc-shaped concave surface.

21. The spreader according to claim 18, characterized in that, The first guide plate (211) and / or the second guide plate (212) tend to extend horizontally at the end away from the swivel disc (1).

22. The spreader according to claim 17, characterized in that, The guide component (21) further includes a third guide plate (213), which is spaced below the first guide plate (211). One end of the third guide plate (213) is close to the edge of the lower half of the rising part (101), and the other end extends upward in the first horizontal direction.

23. The spreader according to claim 18, characterized in that, The guide component (21) further includes a fourth guide plate (214), which is disposed between the swivel disc (1) and the second guide plate (212). The fourth guide plate (214) extends in the same direction as the inclination direction of the second guide plate (212).

24. The spreader according to claim 18, characterized in that, The lower surface of the first guide plate (211) and / or the second guide plate (212) is provided with a material blocking protrusion (215). When the spreader is working, the material blocking protrusion (215) is used to shorten the distance that the material hitting it is thrown horizontally relative to the throwing disc (1).

25. The spreader according to claim 24, characterized in that, The material-blocking protrusion (215) is configured in a hemispherical shape, and the lower surface of the first guide plate (211) and / or the second guide plate (212) is provided with one or more material-blocking protrusions (215) at intervals.

26. The spreader according to claim 15, characterized in that, The first guard plate (22) and the second guard plate (23) are respectively fixedly connected to both sides of the guide member (21) by connectors; Alternatively, one of the first guard plate (22) and the second guard plate (23) may be integrally formed with the guide member (21), and the other may be fixedly connected to the guide member (21) through a connector.

27. The spreader according to any one of claims 1-26, characterized in that, When the spreader is in operation, the rotation plane of the swivel disc (1) is in a vertical position.

28. An unmanned seeding device, characterized in that, Includes an unmanned vehicle and a seeder as described in any one of claims 1-27 mounted on the unmanned vehicle.

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