Aerial seeding apparatus and unmanned aerial vehicle thereof

Description

Spreading device and drone

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 4, 2023, with application number 202311134102.8 and application name “Spreading device and its drone”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of drones, and more specifically, to a spreading device with a hood brim and a drone thereof. Background Art

[0003] In modern agricultural production, the spreading of materials in granular or powdered form, such as seeds and fertilizers, is often necessary. With the continuous advancement of agricultural modernization and precision agriculture, the development of agricultural machinery has greatly facilitated agricultural modernization. By equipping drones with spreading systems, they can provide efficient and convenient methods for operations such as rice sowing and fertilization.

[0004] Currently, drone spreading systems primarily use centrifugal disks to throw material particles horizontally, creating a parabolic motion. The velocity and angle of the ejected material often result in excessively wide spreads and sparse material, leading to poor spreading results.

[0005] Summary of the Invention

[0006] The present application provides a spreading device and a UAV thereof, which can limit the exit angle of the material, reduce the width, increase the density, and improve the spreading effect by setting a brim at a certain angle to the horizontal plane.

[0007] In a first aspect, a spreading device is provided, which includes: a material bin for storing materials, the materials being discharged from the material bin through a discharge unit connected to the material bin; a spreading plate located below the discharge unit and configured to rotate on a rotating plane to throw out the materials introduced by the discharge unit through centrifugal force; a driving device connected to the spreading plate and configured to drive the spreading plate to rotate; a brim, arranged above the spreading plate and shaped like a hollow cone, configured to rebound the thrown materials so that the material is spread with a width of R f , the angle θ between the inner side of the brim and the horizontal plane conforms to the following relationship:

[0008] in, is the angle between the rebound direction of the material and the horizontal plane, and β is the angle between the velocity direction of the material hitting the brim and the projection of the normal line of the brim surface on the horizontal plane.

[0009] In conjunction with the first aspect, in certain implementations of the first aspect, the angle β between the direction in which the material impacts the brim and the projection of the normal line of the brim surface on the horizontal plane satisfies the following relationship: Among them, R s is the radius of the spreading disc, R m is the distance between the rebound point of the material on the brim and the center of the spread plate, r is the distance between the landing point of the material on the spread plate and the center of the spread plate, and α is the angle between the speed direction of the material when it leaves the spread plate and the tangent direction of the spread plate.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the angle between the material rebound direction and the horizontal plane is According to the sowing width R of the material f and the height H of the spreading disc are determined to satisfy the following relationship: V t =ωR s

[0011] Wherein, ω is the angular velocity of the spreading disc, g is the acceleration due to gravity, d is the diameter of the material, ρ is the density of the material, and μ is the air resistance coefficient under standard atmospheric pressure.

[0012] In combination with the first aspect, in certain implementations of the first aspect, raised guide strips are provided on the spreading disc, and the guide strips are evenly distributed on the spreading disc.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the device further includes an adjustment unit, configured to adjust an angle θ between an inner side surface of the brim and a horizontal plane.

[0014] According to the solution of the present application, the exit angle of the material can be limited, the width can be reduced, the density can be increased, and the spreading effect can be improved.

[0015] In a second aspect, a drone is provided, comprising: a fuselage for providing flight power and controlling flight; a bracket arranged below the fuselage; a spreading device connected to the bracket; wherein the spreading device comprises: a material bin for storing materials, the materials being discharged from the material bin through a discharge unit connected to the material bin; a spreading disc located below the discharge unit and configured to rotate in a rotating plane to throw out the materials introduced by the discharge unit through centrifugal force; a driving device connected to the spreading disc and configured to drive the spreading disc to rotate; a brim arranged above the spreading disc and shaped as a hollow cone for rebounding the thrown materials so that the material spreading width is R f , the angle θ between the inner side of the brim and the rotation plane conforms to the following relationship:

[0016] in, is the angle between the rebound direction of the material and the horizontal plane, and β is the angle between the velocity direction of the material hitting the brim and the projection of the normal line of the brim surface on the horizontal plane.

[0017] In conjunction with the second aspect, in certain implementations of the second aspect, the angle β between the direction in which the material impacts the brim and the projection of the brim surface normal on the horizontal plane satisfies the following relationship: Among them, R s is the radius of the spreading disc, R m is the distance between the rebound point of the material on the brim and the center of the spread plate, r is the distance between the landing point of the material on the spread plate and the center of the spread plate, and α is the angle between the speed direction of the material when it leaves the spread plate and the tangent direction of the spread plate.

[0018] In conjunction with the second aspect, in certain implementations of the second aspect, the angle between the material rebound direction and the horizontal plane is According to the sowing width R of the material f and the height H of the spreading disc are determined to satisfy the following relationship: V t =ωR s

[0019] Where ω is the angular velocity of the spreader, g is the acceleration due to gravity, d is the diameter of the material, ρ is the density of the material, and μ is the air resistance coefficient under standard atmospheric pressure.

[0020] In combination with the second aspect, in certain implementations of the second aspect, raised guide strips are provided on the spreading disc, and the guide strips are evenly distributed on the spreading disc.

[0021] In combination with the second aspect, in certain implementations of the second aspect, the device further includes an adjustment unit, which is used to adjust an angle θ between the inner side surface of the brim and the horizontal plane.

[0022] According to the solution of the present application, the exit angle of the material can be limited, the width can be reduced, the density can be increased, and the spreading effect can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic diagram of a spreading device provided in an embodiment of the present application.

[0024] FIG2 is a schematic diagram of the structure of the brim and spreading plate provided in an embodiment of the present application.

[0025] FIG3 is a schematic diagram of material rebound analysis provided in an embodiment of the present application.

[0026] FIG4 is a schematic diagram of a parabolic analysis of materials provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solution in this application will be described below with reference to the accompanying drawings.

[0028] The terms "including" and "having" and any variations thereof in the embodiments of the present application shown below are intended to cover non-exclusive inclusions, for example, a system, product or device comprising a series of units is not necessarily limited to those units explicitly listed, but may include other units not explicitly listed or inherent to these products or devices.

[0029] In the embodiments of this application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. An embodiment or design described as "exemplarily" or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. The use of words such as "exemplarily" or "for example" is intended to present related concepts in a concrete manner to facilitate understanding.

[0030] FIG1 is a schematic diagram of a spreading device 100 provided in an embodiment of the present application.

[0031] As shown in FIG1 , the spreading device comprises at least:

[0032] The material warehouse 110 is used to store materials.

[0033] It should be understood that the material can be solid particles such as seeds, fertilizers, feed or pesticides, and this application does not limit this.

[0034] The embodiment of the present application does not limit the shape, size, and material of the material bin 110. Those skilled in the art can select or design according to actual needs. For example, the upper part of the material bin 110 can be barrel-shaped, the bottom can be in the shape of an inverted funnel, and can be made of a plastic material with stable performance, not easy to deform, and light weight. In another example, the upper part of the material bin 110 can be box-shaped, the bottom can be in the shape of an inverted funnel, and the material can be a metal material with high strength and stable performance.

[0035] The unloading unit 120 is connected to the material bin 110 , and the material in the material bin 110 is discharged from the material bin through the unloading unit 120 .

[0036] It should be understood that in some embodiments, the unloading unit can be integrated with the material bin, or it can be arranged as a separate component below the material bin. However, the materials will be discharged from the material bin through the unloading unit, and the specific arrangement of the unloading unit is not limited in the embodiments of the present application.

[0037] In some embodiments, a regulating valve may be provided in the unloading unit, and the regulating valve is used to adjust the amount and speed of the material passing through.

[0038] As shown in FIG2 , the spreading disc 130 is located below the unloading unit 120 and can rotate on a rotation plane to throw out the material introduced by the unloading unit through centrifugal force.

[0039] The spreading disc 130 is provided with raised guide strips which are evenly distributed on the spreading disc.

[0040] For example, the guide strips may be straight protrusions, which are arranged along the radius of the circle of the spreading disc and are evenly distributed around the center of the circle.

[0041] As another example, the guide strips may be curved strip-shaped protrusions that are centrally symmetrically distributed around the center of the spreading disc.

[0042] The driving device 140 is connected to the spreading disc 130 to drive the spreading disc 130 to rotate.

[0043] It should be understood that the driving device can be arranged above or below the spreading disc and connected to the spreading disc through a transmission structure. This application does not limit the location and manner of setting the driving device.

[0044] The rotation of the spreading disc generates centrifugal force, which throws the solid granular material that falls on the spreading disc out of the spreading disc in a centrifugal manner. Due to the gravity of the material itself, the centrifugal force, the upward reaction force of the spreading disc on the particles and the supporting force of the guide strip, the solid material in the spreading disc is thrown out under the action of centrifugal force.

[0045] For example, the material of the spreading disc 130 is not limited, and those skilled in the art can select or design it according to actual needs. In some embodiments, the spreading disc 130 can be disc-shaped and made of metal. In other embodiments, the spreading disc 130 can also be made of plastic.

[0046] It should be understood that the material is thrown out by the spreading disc in a parabolic motion, and the material's ejection speed and angle often result in the material width being too large and the material being sparse. Therefore, this application proposes a spreading device that limits the ejection angle, reduces the width, and increases the spreading density by adding a brim to the spreader.

[0047] The brim 150 is arranged above the spreading plate 130 and is in the shape of a hollow cone, which is used to rebound the thrown material so that the material is spread with a width of R f , the angle θ between the inner side of the brim and the horizontal plane conforms to the following relationship:

[0048] in, is the angle between the material rebound direction and the horizontal plane, and β is the angle between the direction in which the material hits the brim and the projection of the brim surface normal on the horizontal plane.

[0049] The material spreading width is the horizontal distance from the rebound point of the material on the brim to the ground.

[0050] Furthermore, as shown in FIG3 , the angle β between the direction in which the material hits the brim and the projection of the normal line of the brim surface on the horizontal plane satisfies the following relationship:

[0051] Among them, R s is the radius of the spreading disc, R m is the distance between the rebound point of the material on the brim and the center of the spread plate, r is the landing radius of the material falling on the spread plate, and α is the angle between the direction of the movement speed of the material when it leaves the spread plate and the tangent direction of the spread plate.

[0052] Furthermore, as shown in FIG4 , the angle between the material rebound direction and the horizontal plane According to the material's sowing width R f and the height H of the spreading disc, satisfying the following relationship: V t =ωR s

[0053] Where ω is the angular velocity of the spreader, g is the acceleration due to gravity, d is the diameter of the material, ρ is the density of the material, and μ is the air resistance coefficient under standard atmospheric pressure.

[0054] The brim can be installed by being clipped onto the bracket, connected to the bracket by bolts, connected to the bracket by hinges, or other connection methods, which are not limited in this application.

[0055] It should be understood that in the embodiments of the present application, the brim may also be referred to as a baffle, a reflector, etc., and the present application does not limit this.

[0056] The bottom angle θ of the brim can be adjusted as needed using the adjustment unit. Generally speaking, if you want to reduce the sowing width, you can adjust the bottom angle of the brim to a larger angle, thereby limiting the range of material spread by the sowing disc. If you want to increase the sowing width, you can adjust the bottom angle of the brim to a smaller angle, thereby expanding the range of material spread by the sowing disc.

[0057] This application does not limit the setting method and setting position of the adjustment unit.

[0058] According to the embodiment provided in the present application, by providing a brim at a certain angle to the spreading disc surface, the exit angle of the material can be limited, the spreading width can be reduced, the spreading density can be increased, and the spreading effect can be improved.

[0059] An embodiment of the present application provides a drone.

[0060] It should be understood that the UAV may be a rotary-wing UAV, a fixed-wing UAV, an unmanned helicopter, or a fixed-wing-rotor hybrid UAV. Rotary-wing UAVs include multi-rotor UAVs. Multi-rotor UAVs include two-rotor UAVs, four-rotor UAVs, six-rotor UAVs, eight-rotor UAVs, ten-rotor UAVs, or twelve-rotor UAVs. The UAV may also communicate wirelessly or wired with a control terminal, thereby enabling control of the UAV via the control terminal.

[0061] The UAV includes a fuselage for providing flight power and controlling flight.

[0062] The bracket is set under the fuselage.

[0063] It should be understood that the fuselage is the structural carrier of the drone, used to install control components such as the flight control motherboard and parts such as batteries, thereby providing flight power and controlling flight direction, angle, and altitude. At the same time, the bracket used to support the drone's takeoff and landing can be fastened to the lower part of the fuselage with screws. The bracket can be a fixed tripod that is open during the drone's flight operation to allow for landing at any time. Other accessories required for the drone can also be fixedly installed on the bracket. This application does not limit the configuration of the drone fuselage and bracket.

[0064] The spreading device is connected to the bracket.

[0065] It should be understood that the spreading device is the spreading device in the above embodiment, and reference may be made to the above description, which will not be repeated here.

[0066] An embodiment of the present application provides a drone.

[0067] It should be understood that the UAV may be a rotary-wing UAV, a fixed-wing UAV, an unmanned helicopter, or a fixed-wing-rotor hybrid UAV. Rotary-wing UAVs include multi-rotor UAVs. Multi-rotor UAVs include two-rotor UAVs, four-rotor UAVs, six-rotor UAVs, eight-rotor UAVs, ten-rotor UAVs, or twelve-rotor UAVs. The UAV may also communicate wirelessly or wired with a control terminal, thereby enabling control of the UAV via the control terminal.

[0068] The UAV includes a fuselage for providing flight power and controlling flight.

[0069] The bracket is set under the fuselage.

[0070] It should be understood that the fuselage is the structural carrier of the drone, used to install control components such as the flight control motherboard and parts such as batteries, thereby providing flight power and controlling flight direction, angle, and altitude. At the same time, the bracket used to support the drone's takeoff and landing can be fastened to the lower part of the fuselage with screws. The bracket can be a fixed tripod that is open during the drone's flight operation to allow for landing at any time. Other accessories required for the drone can also be fixedly installed on the bracket. This application does not limit the configuration of the drone fuselage and bracket.

[0071] The spreading device is connected to the bracket.

[0072] It should be understood that the spreading device is the spreading device in the above embodiment, and reference may be made to the above description, which will not be repeated here.

[0073] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0074] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0075] It should be understood that different embodiments can be used independently or in combination based on certain internal or external connections, and different implementation methods in the embodiments can be used independently or in combination.

[0076] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A spreading device, characterized in that: include: A material bin, used to store materials, the materials are discharged from the material bin through a material unloading unit connected to the material bin; A spreading plate, located below the material discharging unit, is used to rotate in a rotating plane to throw out the material introduced by the material discharging unit through centrifugal force; A driving device, connected to the spreading disc, and used to drive the spreading disc to rotate; The brim is arranged above the spreading plate and is in the shape of a hollow cone, which is used to rebound the thrown material so that the spreading width of the material is R f , the angle θ between the inner side of the brim and the horizontal plane meets the following relationship: in, is the angle between the rebound direction of the material and the horizontal plane, and β is the angle between the velocity direction of the material hitting the brim and the projection of the normal line of the brim surface on the horizontal plane.

2. The device according to claim 1, characterized in that The angle β between the direction in which the material hits the brim and the projection of the normal line of the brim surface on the horizontal plane satisfies the following relationship: Among them, R s is the radius of the spreading disc, R m is the distance between the rebound point of the material on the brim and the center of the spreading plate, r is the distance between the landing point of the material falling on the spreading plate and the center of the spreading plate, and α is the angle between the speed direction of the material when leaving the spreading plate and the tangent direction of the spreading plate.

3. The device according to claim 2, characterized in that The angle between the material rebound direction and the horizontal plane According to the sowing width R of the material f and the height H of the spreading plate are determined to satisfy the following relationship: V t =ωR s Wherein, ω is the angular velocity of the spreading disc, g is the acceleration of gravity, d is the diameter of the material, ρ is the density of the material, and μ is the air resistance coefficient under standard atmospheric pressure.

4. The spreading device according to any one of claims 1 to 3, characterized in that The spreading disc is provided with raised guide strips, and the guide strips are evenly distributed on the spreading disc.

5. The spreading device according to any one of claims 1 to 3, characterized in that The device further comprises an adjusting unit, and the adjusting unit is used to adjust an angle θ between an inner side surface of the brim and a horizontal plane.

6. A drone, characterized in that: include: The fuselage is used to provide flight power and control flight; A bracket, arranged below the fuselage; a spreading device connected to the support; Wherein, the spreading device comprises: A material bin, used to store materials, the materials are discharged from the material bin through a material unloading unit connected to the material bin; A spreading plate, located below the material discharging unit, is used to rotate in a rotating plane to throw out the material introduced by the material discharging unit through centrifugal force; A driving device, connected to the spreading disc, and used to drive the spreading disc to rotate; The brim is arranged above the spreading plate and is in the shape of a hollow cone, which is used to rebound the thrown material so that the spreading width of the material is R f , the angle θ between the inner side of the brim and the rotation plane meets the following relationship: in, is the angle between the rebound direction of the material and the horizontal plane, and β is the angle between the velocity direction of the material hitting the brim and the projection of the normal line of the brim surface on the horizontal plane.

7. The drone according to claim 6, characterized in that: The angle β between the direction in which the material hits the brim and the projection of the normal line of the brim surface on the horizontal plane satisfies the following relationship: Among them, R s is the radius of the spreading disc, R m is the distance between the rebound point of the material on the brim and the center of the spreading plate, r is the distance between the landing point of the material falling on the spreading plate and the center of the spreading plate, and α is the angle between the speed direction of the material when leaving the spreading plate and the tangent direction of the spreading plate.

8. The drone according to claim 7, characterized in that: The angle between the material rebound direction and the horizontal plane According to the sowing width R of the material f and the height H of the spreading plate are determined to satisfy the following relationship: V t =ωR s Wherein, ω is the angular velocity of the spreading disc, g is the acceleration of gravity, d is the diameter of the material, ρ is the density of the material, and μ is the air resistance coefficient under standard atmospheric pressure.

9. The drone according to any one of claims 6 to 8, characterized in that: The spreading disc is provided with raised guide strips, and the guide strips are evenly distributed on the spreading disc.

10. The drone according to any one of claims 6 to 8, characterized in that: The device also includes a control unit, which is used to adjust the angle θ between the inner side surface of the brim and the horizontal plane.

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