CN220842953U - Spreading equipment and drones - Google Patents

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, and specifically, to a spreading mechanism and an unmanned aerial vehicle, wherein the unmanned aerial vehicle comprises a spreading mechanism, and the spreading mechanism comprises a spreading component and a conveying component, and the conveying component comprises a shell and an auger, and the auger is rotatably arranged on the shell, and the shell has a feeding end and a discharging end; the auger is used to convey the material entering the shell from the feeding end to the discharging end, and to convey the material from the discharging end to the spreading component for spreading; wherein the auger comprises a first auger section and a second auger section connected to each other, and along the direction in which the material is conveyed in the shell, the second auger section is closer to the discharging end relative to the first auger section, and the radial width of the blades of the second auger section is greater than the radial width of the blades of the first auger section. The spreading mechanism of the utility model can improve the problem of easy blockage and material jamming during material transportation, which is conducive to improving the transportation efficiency and improving the problem of high energy consumption.

Description

Spreading equipment and drones

Technical Field

The utility model relates to the technical field of unmanned aerial vehicles, and in particular to a spreading mechanism and a unmanned aerial vehicle.

Background technique

Drones are gradually being widely used in agriculture-related fields. For drones equipped with spreading mechanisms, they are becoming more popular and widely used and recognized because of their advantages such as flexibility, quick response, low unmanned flight operation requirements, and high operating speed. The spreading mechanism includes a conveying component for conveying materials such as seeds or fertilizers. The conveying component can convey materials such as seeds or fertilizers to the spreading component for spreading, so as to complete the spreading operation of related materials.

However, the spreading mechanism provided by the related art is prone to blockage and material jamming during material transportation, resulting in reduced transportation efficiency and high energy consumption.

Utility Model Content

The utility model aims to provide a spreading mechanism and a UAV, wherein the spreading mechanism can improve the problem of easy blockage and material jamming during material transportation, is conducive to improving the transportation efficiency, and improves the problem of high energy consumption.

The embodiment of the utility model is achieved as follows:

In a first aspect, the utility model provides a spreading mechanism that can be used for a drone, comprising:

Spreading components;

The conveying assembly includes a shell and an auger. The auger is rotatably arranged on the shell. The shell has an inlet end and an outlet end. The auger is used to convey the material entering the shell from the inlet end to the outlet end, and to convey the material from the outlet end to the spreading assembly for spreading.

The auger includes a first auger section and a second auger section which are connected to each other. Along the direction of material conveying in the shell, the second auger section is closer to the discharge end relative to the first auger section, and the radial width of the blades of the second auger section is greater than the radial width of the blades of the first auger section.

In an optional embodiment, a feed port is provided at the feed end, and the first auger section is distributed opposite to the feed port.

In an optional embodiment, the feed inlet is disposed above the auger and the feed inlet is distributed upward, and the first auger section is the portion of the auger that can be covered by the material falling from the feed inlet.

In an optional embodiment, the second auger section is the remaining portion outside the first auger section.

In an optional embodiment, a discharge port is provided at the discharge end, and along the extension direction of the rotation axis of the auger, the discharge port is located at an end of the second auger section away from the first auger section.

In an optional embodiment, the shell includes a conveying pipe and a feeding hopper, one end of the conveying pipe is connected to the feeding hopper, and the other end of the conveying pipe is provided with a discharge port.

In an optional embodiment, a feed port is provided above the feed hopper; the first auger section is provided in the feed hopper and is distributed opposite to the feed port, and the second auger section is provided in the conveying pipe.

In an optional embodiment, the inner cavity of the hopper is larger than the inner cavity of the conveying pipe.

In an optional embodiment, the shell includes a reducer, and the feed hopper and the conveying pipe are connected by the reducer; the inner diameter of the reducer gradually increases from one end close to the feed hopper to the end away from the feed hopper, and the inner diameter of the conveying pipe is equal to or greater than the inner diameter of the end of the reducer away from the feed hopper.

In an optional embodiment, the diameter of the rotating shaft of the first auger section is equal to the diameter of the rotating shaft of the second auger section.

In an optional embodiment, the diameter of the rotating shaft of the first auger section is greater than the diameter of the rotating shaft of the second auger section.

In an optional embodiment, the outer diameter of the blades of the first auger section is d1, and the outer diameter of the blades of the second auger section is d2, wherein 1.025≤d2/d1≤1.12.

In an optional embodiment, the pitch of the blades of the first auger section is smaller than the pitch of the blades of the second auger section.

In an optional embodiment, the pitch of the blades of the first auger section is 5-15 mm smaller than the pitch of the blades of the second auger section.

In a second aspect, the utility model provides a drone, comprising a drone body, a material storage assembly and a spreading mechanism of any one of the aforementioned embodiments; the material storage assembly is arranged on the drone body; the conveying assembly is connected to the material storage assembly and is used to receive materials output from the material storage assembly.

The beneficial effects of the drone and the spreading mechanism of the utility model embodiment include: the drone provided by the utility model embodiment includes a drone body, a material storage component and a spreading mechanism; the material storage component is arranged on the drone body; the conveying component of the spreading mechanism is connected to the material storage component and is used to receive the material output from the material storage component; the spreading component of the spreading mechanism is used to spread the material conveyed by the conveying component; wherein the conveying component includes a shell and an auger, the auger is used to convey the material entering the shell, and the auger includes a first auger section and a second auger section connected to each other, and along the direction of material conveying in the shell, the second auger section is relative to the first auger section The auger section is close to the discharge end, and the radial width of the blades of the second auger section is greater than the radial width of the blades of the first auger section; in this way, when the material is transported from the feed end to the discharge end of the shell under the action of the auger, since the radial width of the blades of the second auger section is greater than the radial width of the blades of the first auger section, when the material moving toward the discharge end contacts the second auger section, the contact area between the material and the corresponding blades increases, so as to reduce the material conveying pressure, thereby improving the problem of easy clogging and jamming of the material, which is beneficial to improving the material conveying efficiency and improving the problem of increased energy consumption in conveying the material due to easy clogging of the material.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic structural diagram of a conveying assembly in an embodiment of the utility model at a first viewing angle;

FIG2 is a schematic diagram of the structure of the conveying assembly in the embodiment of the utility model at a second viewing angle;

Fig. 3 is a cross-sectional view taken along the A-A direction in Fig. 1;

FIG4 is a schematic diagram of the structure of the auger in an embodiment of the present utility model;

5 is a line graph of the conveying efficiency at different ratios between the outer diameter of the blades of the second auger section and the outer diameter of the blades of the first auger section in an embodiment of the utility model.

Icon: 010- conveying component; 100- shell; 101- feed end; 102- discharge end; 110- feed hopper; 111- feed port; 120- conveying pipe; 121- discharge port; 122- reducer; 200- auger; 210- first auger section; 220- second auger section.

Detailed ways

In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in the subsequent drawings.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

This embodiment provides a drone that can be used to spread materials such as seeds and fertilizers.

The drone includes a drone body and a spreading mechanism arranged on the drone body, wherein the drone body is used to drive the spreading mechanism to move synchronously, so that during the movement of the spreading mechanism, the spreading mechanism can be used to complete the spreading operation of materials such as seeds and fertilizers.

Furthermore, the UAV also includes a material storage component, which is arranged on the UAV body, and the material storage component is used to store materials, and can transport the stored materials to the spreading mechanism for material spreading operations; the above-mentioned material storage component can transport the stored materials to the spreading mechanism for material spreading operations, which may refer to the stored materials in the material storage component falling into the spreading mechanism under the action of its own weight, or it may refer to being transported to the spreading mechanism under the action of the conveying component.

The spreading mechanism of this embodiment includes a conveying component 010 (as shown in Figures 1 and 2) and a spreading component. The conveying component 010 is connected to the material storage component and is used to receive the material output from the material storage component. That is, the material stored in the material storage component can be conveyed to the conveying component 010, and then the conveying component 010 conveys the material to the spreading component for spreading operations.

It should be noted that the connection mode between the conveying assembly 010 and the material storage assembly can be selected as needed; in this embodiment, the conveying assembly 010 is connected to the material storage assembly by fasteners such as bolts. Of course, in other embodiments, the conveying assembly 010 can also be connected to the material storage assembly by a clamping connection, etc.; in other embodiments, the conveying assembly 010 can also be connected to the material storage assembly by a bracket connected to the drone body, rather than being directly connected to the material storage assembly, which is not specifically limited here.

Please refer to Figures 1, 2 and 3. In this embodiment, the conveying component 010 includes a shell 100 and an auger 200. The auger 200 is rotatably disposed in the shell 100 and is used to convey the material in the shell 100; specifically, the shell 100 has a feed end 101 and a discharge end 102. The auger 200 is used to convey the material entering the shell 100 from the feed end 101 to the discharge end 102, and to convey the material from the discharge end 102 to the spreading component for spreading.

Furthermore, the shell 100 is provided with a discharge port 121 and a feed port 111. Specifically, the feed end 101 is provided with the feed port 111, and the discharge end 102 is provided with the discharge port 121; the feed port 111 is used to receive the material transported from the storage component, that is, the material can enter the shell 100 from the feed port 111, and the material in the shell 100 can be transported by the auger 200 and output from the discharge port 121.

Furthermore, a spreading assembly is disposed on the housing 100 for spreading the material output from the discharge port 121 ; in this way, the efficiency of material spreading can be ensured.

In one embodiment, the spreading assembly may include a throwing tray, which can rotate under the drive of a motor, and the material output from the housing 100 through the discharge port 121 can be beaten, spread or centrifuged out by the throwing tray. The throwing tray can be arranged horizontally, so that the material falls into the throwing tray and is thrown out horizontally under the action of centrifugal force; the throwing tray can also be arranged non-horizontally, so that the material can be beaten by the blades on the throwing tray and thrown downward. The specific structure of the spreading assembly will not be described in detail here.

In order to enable the auger 200 to reliably transport the material in the shell 100 and reduce the problem of material clogging near the feed port 111, the feed port 111 and the auger 200 are relatively distributed, so that when the material enters the shell 100 from the feed port 111, the auger 200 can be used to reliably push the material near the feed port 111.

Furthermore, the feed port 111 is disposed above the shell 100 , so that the material falling into the shell 100 from the feed port 111 can reliably contact the auger 200 , thereby ensuring that the material can be reliably pushed toward the discharge port 121 by the auger 200 .

Please refer to Figure 2. In this embodiment, the shell 100 includes a conveying pipe 120 and a hopper 110. One end of the conveying pipe 120 is connected to the hopper 110. The other end of the conveying pipe 120 is provided with a discharge port 121. The hopper 110 is provided with an inlet port 111, that is, the inlet port 111 is provided above the hopper 110. The auger 200 is rotatably provided in the conveying pipe 120 and extends into the hopper 110. In this way, the material in the shell 100 can be effectively discharged from the discharge port 121 to reduce the blockage of the material in the shell 100.

It should be noted that the spreading mechanism further includes a motor (not shown), which is coaxially connected to the auger 200 so as to utilize the motor to drive the auger 200 to rotate, thereby reliably conveying the material in the housing 100 .

In order to improve the problem of clogging and jamming of materials in the housing 100 when the auger 200 is conveying, improve the conveying efficiency, and improve the problem of high energy consumption, please refer to Figures 3 and 4. The auger 200 of this embodiment includes a first auger section 210 and a second auger section 220 connected to each other. Along the direction of material conveying in the housing 100, the second auger section 220 is closer to the discharge end 102 relative to the first auger section 210, and the radial width R2 of the blades of the second auger section 220 is greater than the radial width R1 of the blades of the first auger section 210. In this way, when the material is transported from the feed end 101 of the shell 100 to the discharge end 102 under the action of the auger 200, since the radial width R2 of the blades of the second auger section 220 is greater than the radial width R1 of the blades of the first auger section 210, when the material moving toward the discharge end 102 contacts the second auger section 220, the contact area between the material and the corresponding blades increases, so that the material conveying pressure is reduced, so as to improve the problem of easy clogging and jamming of the material, which is beneficial to improving the material conveying efficiency and improving the problem of increased energy consumption in conveying materials due to easy clogging of the material.

Furthermore, the first auger section 210 is arranged in the feed hopper 110 and is arranged opposite to the feed inlet 111; the second auger section 220 is arranged in the conveying pipe 120, that is, the feed inlet 111 is arranged above the auger 200, and the feed inlet 111 is arranged upward, the first auger section 210 is the part of the auger that can be covered by the material falling from the feed inlet 111, and the part of the auger 200 that cannot be covered by the material when the material falls from the feed inlet 111 into the feed hopper 110 is the second auger section 220. In this way, the first auger section 210 arranged in the feed hopper 110 can be used to reliably convey the material entering the feed hopper 110 to the conveying pipe 120, and then the second auger section 220 with a larger radial width of the blades in the conveying pipe 120 can be used to reliably convey the material to be output from the discharge port 121, effectively improving the problem of material blockage at various positions in the housing 100, and ensuring a higher material conveying efficiency.

Optionally, the inner cavity of the feed hopper 110 is larger than the inner cavity of the conveying pipe 120; when the material is conveyed from the feed hopper 110 to the conveying pipe 120 under the action of the auger 200, the material is conveyed from a large space to a small space. By configuring a second auger section 220 with a larger radial width of blades in the conveying pipe 120, the resistance caused by the smaller conveying space can be overcome, blockage can be improved, and the conveying efficiency can be improved.

Optionally, the housing includes a reducer 122, and the hopper 110 and the conveying pipe 120 are connected by the reducer 122; the inner diameter of the reducer 122 gradually increases from the end close to the hopper 110 to the end far from the hopper 110, and the inner diameter of the conveying pipe 120 is equal to or greater than the inner diameter of the end of the reducer 122 far from the hopper 110. By arranging the reducer 122 with an enlarged diameter between the hopper 110 and the conveying pipe, the problem of blockage in the process of conveying materials from the hopper 110 to the conveying pipe 120 can be improved.

Optionally, the length H1 of the hopper 110 is greater than the length H2 of the delivery pipe 120, so that the problem of material clogging and jamming in the housing 100 can be further improved. Of course, in other embodiments, the length H1 of the hopper 110 can also be less than or equal to the length H2 of the delivery pipe 120.

In order to further improve the problem of material blockage at the discharge port 121, the discharge port 121 is arranged at the end of the shell 100. Specifically, the discharge port 121 is arranged at the end of the conveying pipe 120 away from the hopper 110, that is, along the extension direction of the rotation axis of the auger 200, the discharge port 121 is located at the end of the second auger section 220 away from the first auger section 210. In this way, when the auger 200 pushes the material in the shell 100 to move, the material can be directly pushed out by the blades of the auger 200 from the discharge port 121 opened at the end of the conveying pipe 120, so as to improve the problem of material easy blockage near the discharge port 121.

Of course, in other embodiments, the discharge port 121 may also be disposed on the side wall of the conveying pipe 120 ; or, in other embodiments, the feed port 111 may also be disposed at the end of the feed hopper 110 away from the conveying pipe 120 .

It should be understood that in other embodiments, the auger 200 may also include a third auger section, which is connected to the end of the second auger section 220 away from the first auger section 210, and the third auger section is located in the conveying pipe 120, and the radial width of the blades of the third auger section is greater than the radial width R2 of the blades of the second auger section 220; or, the auger 200 may also include a fourth auger section, which is connected to the end of the first auger section 210 away from the second auger section 220, and the fourth auger section is located in the hopper 110, and the radial width of the blades of the fourth auger section is less than the radial width R1 of the blades of the first auger section 210.

The structure of the auger 200 can be selected as needed; in the present embodiment, the auger 200 comprises a rotating shaft and spiral blades connected to the rotating shaft; wherein, the portion of the auger 200 located in the feed hopper 110 is the first auger section 210, and the portion of the auger 200 located in the conveying pipe 120 is the second auger section 220, that is, the rotating shaft of the first auger section 210 and the rotating shaft of the second auger section 220 are integrally formed, and the blades of the first auger section 210 and the blades of the second auger section 220 are continuous and uninterrupted integrated spiral blades.

Of course, in other embodiments, the rotating shaft of the first auger section 210 and the rotating shaft of the second auger section 220 can be connected by threaded connection or welding, and the blades of the first auger section 210 and the blades of the second auger section 220 have the same rotation direction, and the end of the blade of the first auger section 210 close to the second auger section 220 is abutted, clamped, plugged or overlapped with the end of the blade of the second auger section 220 close to the first auger section 210.

Furthermore, the diameter of the rotating shaft of the first auger section 210 is equal to the diameter of the rotating shaft of the second auger section 220; the outer diameter of the blades of the first auger section 210 is smaller than the outer diameter of the second auger section 220, so that the radial width R1 of the blades of the first auger section 210 is smaller than the radial width R2 of the blades of the second auger section 220.

Of course, in other embodiments, the diameter of the rotating shaft of the first auger section 210 is greater than the diameter of the second auger section 220; the outer diameter of the blade of the first auger section 210 is less than or equal to the outer diameter of the blade of the second auger section 220, and the radial width R1 of the blade of the first auger section 210 can be made smaller than the radial width R2 of the blade of the second auger section 220. Of course, in the embodiment where the diameter of the rotating shaft of the first auger section 210 is greater than the diameter of the second auger section 220, the outer diameter of the blade of the first auger section 210 can be made larger than the outer diameter of the blade of the second auger section 220 while ensuring that the radial width R1 of the blade of the first auger section 210 is smaller than the radial width R2 of the blade of the second auger section 220. In this way, it can also be ensured that when the material is transported to the second auger section 220, the contact area with the corresponding blade is increased.

Alternatively, in other embodiments, the diameter of the rotating shaft of the first auger section 210 is smaller than the diameter of the second auger section 220 , and it is only necessary to ensure that the radial width R2 of the blades of the second auger section 220 is larger than the radial width R1 of the blades of the first auger section 210 .

In this embodiment, the first auger section 210 and the second auger section 220 are both equal-diameter augers.

Of course, in other embodiments, at least one of the first auger section 210 and the second auger section 220 may also be a variable diameter auger, for example: the first auger section 210 is a variable diameter auger, and the second auger section 220 is a constant diameter auger, wherein the outer diameter of the blades of the first auger section 210 gradually increases from the feed end 101 to the discharge end 102; or, the first auger section 210 is a constant diameter auger, and the second auger section 220 is a variable diameter auger, wherein the outer diameter of the blades of the second auger section 220 gradually increases from the feed end 101 to the discharge end 102.

The ratio of the outer diameter d1 of the blade of the first auger section 210 to the outer diameter d2 of the blade of the second auger section 220 can be set as needed; for example: 1.025≤d2/d1≤1.12. In this embodiment, d2/d1 is 1.097.

In the related art, the outer diameter d1 of the blade of the first auger section 210 is equal to the outer diameter d2 of the blade of the second auger section 220, for example: d1 = d2 = 79 mm, d2/d1 = 1, and the conveying efficiency is 0.449; when the outer diameter d1 of the blade of the first auger section 210 is smaller than the outer diameter d2 of the blade of the second auger section 220, and 1.025≤d2/d1≤1.12, the conveying efficiency is significantly improved (please refer to Figure 5), for example: when d1 = 115 When d1=85.7mm, d2=94, d2/d1=1.097, the conveying efficiency is 0.486; when d1=110mm, d2=114, d2/d1=1.036, the conveying efficiency is 0.488; when d1=120mm, d2=123, d2/d1=1.025, the conveying efficiency is 0.484.

In order to further improve the problem of clogging and jamming when transporting materials in the housing 100, the pitch of the auger 200 can also be optimized; in this embodiment, the auger 200 is a non-fixed pitch auger; specifically, the pitch S1 of the blades of the first auger section 210 is smaller than the pitch S2 of the blades of the second auger section 220. In this way, the pitch of the auger 200 near the discharge end 102 is relative to the pitch of the auger 200 near the feed end 101. When the auger 200 transports the material in the housing 100, the material is transported from the end of the auger 200 with a smaller pitch to the end with a larger pitch. The material filling rate in the housing 100 decreases as the material moves toward the discharge end 102, and the pressure of transporting the material is relieved, thereby improving the problem of easy jamming during material transportation, which is conducive to improving the efficiency of the conveying component 010 in transporting the material to the sowing component, and thereby improving the operating efficiency of the sowing mechanism in sowing the material.

The pitch S1 of the blades of the first auger section 210 and the pitch S2 of the blades of the second auger section 220 can be selected as needed; optionally, the pitch S1 of the blades of the first auger section 210 is 5-15 mm smaller than the pitch S2 of the blades of the second auger section 220, for example: 5 mm, 7 mm, 9 mm, 11 mm, 13 mm, 15 mm, etc. In this embodiment, the pitch S1 of the blades of the first auger section 210 is 5 mm smaller than the pitch S2 of the blades of the second auger section 220.

In this embodiment, the pitch of the first auger section 210 is equidistant, and the pitch of the second auger section 220 is equidistant.

Of course, in other embodiments, at least one of the first auger section 210 and the second auger section 220 has a non-fixed pitch, for example: the pitch of the second auger section 220 is equidistant, and the pitch of the first auger section 210 gradually increases from one end away from the second auger section 220 to one end close to the second auger section 220; or, the pitch of the first auger section 210 is equidistant, and the pitch of the second auger section 220 gradually increases from one end close to the first auger section 210 to one end away from the first auger section 210.

The working principle of the spreading mechanism of this embodiment includes: the auger 200 of the conveying assembly 010 can convey the material in the shell 100 toward the discharge port 121, so that the material is conveyed to the spreading assembly through the discharge port 121, and is beaten and spread out by the spreading assembly.

To sum up, when the conveying component 010 of the spreading mechanism of the utility model conveys materials, since the radial width R2 of the blades of the second auger section 220 is greater than the radial width R1 of the blades of the first auger section 210, when the material moving toward the discharge end 102 contacts the second auger section 220, the contact area between the material and the corresponding blades increases, so that the material conveying pressure is reduced, so as to improve the problem of easy clogging and jamming of the material, which is beneficial to improving the material conveying efficiency and improving the problem of increased energy consumption in conveying materials due to easy clogging of the material.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (14)

1. A mechanism of scattering, can be used for unmanned aerial vehicle, its characterized in that includes:

A sowing component;

The conveying assembly (010), the conveying assembly (010) comprises a shell (100) and an auger (200), the auger (200) is rotatably arranged on the shell (100), and the shell (100) is provided with a feeding end (101) and a discharging end (102); the auger (200) is used for conveying materials entering the shell (100) from the feeding end (101) to the discharging end (102) and conveying the materials from the discharging end (102) to the sowing assembly for sowing; wherein,

The auger (200) comprises a first auger section (210) and a second auger section (220) which are connected with each other, and along the direction that materials are conveyed in the shell (100), the second auger section (220) is close to the discharging end (102) relative to the first auger section (210), and the radial width of the blades of the second auger section (220) is larger than that of the blades of the first auger section (210).

2. The spreading mechanism according to claim 1, wherein the feeding end (101) is provided with a feeding opening (111), and the first auger section (210) is distributed opposite to the feeding opening (111).

3. The spreading mechanism according to claim 2, wherein the feed inlet (111) is disposed above the auger (200), the feed inlet (111) is disposed upward, and the first auger section (210) is a portion of the auger that can be covered by material falling from the feed inlet (111).

4. A spreading mechanism according to claim 3, wherein said second auger section (220) is the remainder of said first auger section (210).

5. A spreading mechanism according to claim 1, wherein the discharge end (102) is provided with a discharge opening (121) and the discharge opening (121) is located at an end of the second auger section (220) remote from the first auger section (210) in the direction of extension of the rotational axis of the auger (200).

6. The sowing mechanism according to claim 5, wherein the housing (100) comprises a conveying pipe (120) and a feeding hopper (110), one end of the conveying pipe (120) is connected with the feeding hopper (110), and the other end of the conveying pipe (120) is provided with the discharge port (121).

7. The sowing mechanism according to claim 6, wherein a feed inlet (111) is provided above the feed hopper (110); the first auger segments (210) are arranged in the feeding hopper (110) and are distributed opposite to the feeding port (111), and the second auger segments (220) are arranged in the conveying pipe (120).

8. A spreading mechanism according to claim 6, wherein the inner cavity of the hopper (110) is larger than the inner cavity of the delivery tube (120).

9. The spreading mechanism according to claim 7, wherein the housing comprises a reducer pipe (122), the hopper (110) and the delivery pipe (120) being connected by the reducer pipe (122); the inner diameter of the reducer pipe (122) gradually increases from one end close to the feeding hopper (110) to one end far away from the feeding hopper (110), and the inner diameter of the conveying pipe (120) is equal to or larger than the inner diameter of one end, far away from the feeding hopper (110), of the reducer pipe (122).

10. A spreading mechanism according to claim 1, wherein the diameter of the rotation axis of the first auger section (210) is equal to the diameter of the rotation axis of the second auger section (220); or alternatively

The diameter of the rotation shaft of the first auger section (210) is larger than the diameter of the rotation shaft of the second auger section (220).

11. The spreading mechanism according to claim 1, wherein the outer diameter of the blades of the first auger section (210) is d1 and the outer diameter of the blades of the second auger section (220) is d2, wherein 1.025.ltoreq.d2/d1.ltoreq.1.12.

12. A spreading mechanism according to any one of claims 1-11, wherein the pitch of the blades of the first auger section (210) is smaller than the pitch of the blades of the second auger section (220).

13. A spreading mechanism according to claim 12, wherein the pitch of the blades of the first auger section (210) is 5-15mm smaller than the pitch of the blades of the second auger section (220).

14. An unmanned aerial vehicle comprising an unmanned aerial vehicle body, a storage assembly and the sowing mechanism of any one of claims 1-13; the storage component is arranged on the unmanned aerial vehicle body; the conveying assembly (010) is connected with the storage assembly and is used for receiving materials output from the storage assembly.