A spreading device and plant protection unmanned equipment

Abstract

The application provides a kind of spreading device and plant protection unmanned equipment, spreading device includes the material conveying mechanism with feed inlet and discharge outlet, the discharge casing of being fixed at the discharge outlet of material conveying mechanism, rotatable flail disc, flail disc drive mechanism is transmission connected with flail disc, and material supporting mechanism, flail disc drive mechanism has rotating shaft, and flail disc is fixed on rotating shaft;Material supporting mechanism includes deformation support, the inner end of deformation support is fixed end fixed on rotating shaft, the outer end of deformation support is free end, annular discharge port is formed between free end and the inner wall of discharge casing, deformation support is automatically deformed under the weight of material, and the deformation degree of deformation support is proportional to the flow of material conveying mechanism, so that the opening size of annular discharge port is self-adapted to the flow of material conveying mechanism.Under the action of deformation support rotation and annular discharge port, material on flail disc is evenly distributed, so as to improve the uniformity of flung material.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to a seeding device and a plant protection unmanned equipment equipped with the seeding device. Background Technology

[0002] Unmanned agricultural equipment (UAVs and unmanned vehicles) is an important tool in modern agriculture, capable of efficiently and accurately completing tasks such as pesticide spraying, sowing, and fertilization. It effectively reduces labor intensity, significantly improves operational efficiency, and can operate flexibly in various terrains and farmland environments. UAVs are widely used in agricultural and forestry plant protection operations, providing efficient and convenient methods and effectively promoting the mechanization, intelligentization, and modernization of agriculture.

[0003] Typically, agricultural drones are equipped with spreading devices for spreading granular or powdery materials in applications such as seeding and fertilization. The structure of existing spreading devices is as follows: Figure 1 As shown, the spreading device includes a spiral feeder 100, a discharge cover 200, a rotatable slinger 300, and a slinger drive mechanism 400 for driving the slinger 300 to rotate. The material enters through the feed inlet of the spiral feeder 100 and is conveyed to the discharge outlet of the spiral feeder 100. The material falls from the discharge outlet into the discharge cover 200 and from the discharge outlet at the lower end of the discharge cover 200 onto the slinger 300. The slinger drive mechanism 400 drives the slinger 300 to rotate, and under the action of centrifugal force, the material on the slinger 300 is thrown out, realizing automatic spreading or automatic fertilization.

[0004] However, the aforementioned existing spreading device has the following defects in actual use: When discharging material from the spiral feeder 100, under relatively small flow conditions, the material will flow out close to the outlet of the spiral feeder 100, causing the material to fall onto the throwing disc 300 and be biased to one side of the throwing disc 300. Figure 2 As shown. Furthermore, when the spiral feeder 100 discharges material, due to the threaded opening at its outlet, the material begins to be discharged as it passes the lowest point of the outlet, such as... Figure 3 As shown, when the spiral feeder 100 rotates, it causes the material to rotate as well, resulting in the material being discharged to one side. Consequently, when the material falls onto the sling plate 300, it is also biased to one side of the sling plate 300. Figure 2 As shown. Ultimately, the two factors mentioned above result in uneven distribution of material after it falls onto the sling plate 300. There is a concentrated material landing area 301 on the sling plate 300. The distribution of material after it is thrown out by centrifugal force on the sling plate 300 is also uneven. Most of the material is concentrated on one side of the sling plate 300. There are densely distributed material areas 302 and sparsely distributed material areas 303 in the working area.

[0005] Therefore, existing spreading devices suffer from uneven material spreading, which affects the accuracy of spreading. Summary of the Invention

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a spreading device that effectively improves the uniformity of material spreading.

[0007] To achieve the above objectives, the present invention provides a spreading device, comprising a material conveying mechanism having an inlet and an outlet, a discharge cover fixed at the outlet of the material conveying mechanism, a rotatable slinger, and a slinger drive mechanism pulverizedly connected to the slinger. The slinger drive mechanism has a rotating shaft rotatably supported in the discharge cover, and the slinger is fixed to the rotating shaft. The spreading device further comprises a material supporting mechanism, which includes a deformable support member rotatably disposed within the discharge cover. The deformable support member is distributed below the outlet of the material conveying mechanism and coaxially disposed above the slinger. The inner end of the deformable support member is a fixed end fixed to the rotating shaft, and the outer end of the deformable support member is a free end. An annular discharge port is formed between the free end and the inner wall of the discharge cover. The outlet of the material conveying mechanism communicates with the annular discharge port through the inner cavity of the discharge cover.

[0008] The deformable support automatically deforms under the weight of the material, and the degree of deformation of the deformable support is proportional to the flow rate of the material conveying mechanism, so that the opening size of the annular discharge port is adapted to the flow rate of the material conveying mechanism.

[0009] Furthermore, the deformable support includes a support umbrella surface made of flexible material, several support ribs circumferentially fixed to the support umbrella surface, a shaft fixing member provided at the fixed end, and a first counterweight fixed at the outer end of each support rib. The inner circumference of the support umbrella surface is fixed to the shaft fixing member, and the shaft fixing member is fixedly sleeved on the outer circumference of the rotating shaft.

[0010] Furthermore, the deformable support includes several circumferentially distributed flexible blades, a shaft fixing member provided at the fixed end, and a second counterweight fixed at the outer end of each of the flexible blades. The inner ends of the flexible blades are all fixed to the shaft fixing member, and the shaft fixing member is fixedly sleeved on the outer periphery of the rotating shaft.

[0011] Furthermore, the deformable support includes several circumferentially distributed flexible brushes and a shaft fixing member provided at the fixed end. The inner ends of the several flexible brushes are all fixed to the shaft fixing member, and the shaft fixing member is fixedly sleeved on the outer periphery of the rotating shaft.

[0012] Furthermore, the material conveying mechanism includes a fixedly installed conveyor housing, a horizontally arranged screw feeding unit rotatably supported inside the conveyor housing, and a conveyor motor and a conveyor drive box both installed in the conveyor housing. The conveyor motor is connected to the screw feeding unit via the conveyor drive box. The top of the conveyor housing is provided with the feed inlet at the beginning of the screw feeding unit, and the side of the conveyor housing is provided with the discharge outlet at the end of the screw feeding unit.

[0013] Furthermore, the disc-spinning drive mechanism also includes a disc-spinning motor and a disc-spinning rotation drive box, both fixed to the unloading cover. The disc-spinning motor is connected to the rotating shaft via the disc-spinning rotation drive box.

[0014] Furthermore, a control box is fixed to the outer periphery of the feeding cover, and a controller is installed inside the control box.

[0015] Furthermore, the discharge cover includes a cylindrical body and a conical cover fixed to the lower end of the cylindrical body. The opening size of the conical cover gradually increases in the direction away from the cylindrical body. The slinger is retracted into the conical cover, and the annular discharge port is formed between the free end and the inner wall of the cylindrical body.

[0016] This application also provides an unmanned plant protection device, including a frame, a material box fixedly installed on the frame, and a spreading device as described above. The material conveying mechanism and the discharge cover are both fixedly installed on the frame, and the material box is connected to the feed port of the material conveying mechanism.

[0017] As described above, the seeding device and agricultural unmanned equipment of the present invention have the following beneficial effects:

[0018] Material slides down from the deformable support, and the opening size of the annular discharge port is automatically adjusted. Under the action of the rotating deformable support and the action of the annular discharge port, the material on the throwing disc is evenly distributed, thereby improving the uniformity of the thrown material and thus improving the uniformity of material spreading. In addition, the degree of deformation of the deformable support and the amount of movement of the free end are adapted to the flow rate of the material conveying mechanism to automatically adjust the opening size of the annular discharge port. It can be well adapted to different flow rates of the material conveying mechanism without material blockage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an existing spreading device.

[0020] Figure 2 for Figure 1 A schematic diagram showing the material biased to one side of the spreading disc during the operation of the spreading device.

[0021] Figure 3 for Figure 1 A schematic diagram showing the material being discharged from the outlet of a spiral feeder.

[0022] Figure 4 This is a schematic diagram of the spreading device of this application, in which the material conveying mechanism is of low flow rate.

[0023] Figure 5 This is a schematic diagram of the spreading device of this application, in which the material conveying mechanism has a high flow rate.

[0024] Figure 6 This is a schematic diagram showing the material being thrown out of the throwing disc during the operation of the spreading device in this application.

[0025] Figure 7 This is a schematic diagram of the structure of the deformable support component in the spreading device of this application, according to Embodiment 1.

[0026] Figure 8 for Figure 7 Top view.

[0027] Figure 9 for Figure 7 A schematic diagram of the operation.

[0028] Figure 10 This is a schematic diagram of the structure of the deformable support component in the spreading device of this application, according to Embodiment 2.

[0029] Figure 11 This is a schematic diagram of the structure of the deformable support component in Embodiment 3 of the spreading device of this application.

[0030] Component designation explanation

[0031] 10. Throwing the plate

[0032] 20 Material conveying mechanism

[0033] 21 Feed Inlet

[0034] 22 Discharge port

[0035] 23 Conveyor Casing

[0036] 24 Screw Feeding Unit

[0037] 25 Conveyor Motors

[0038] 26 Transmission Drive Box

[0039] 30 Material feeding cover

[0040] 31. Cylindrical body

[0041] 32 Conical Cover

[0042] 40. Swing drive mechanism

[0043] 41 Rotation axis

[0044] 42 Spinning disc motor

[0045] 43 Rotary drive box for swivel disc

[0046] 50 Material support mechanism

[0047] 51 Support Sleeve

[0048] 52 Springs

[0049] 53 Support Link

[0050] 60 Deformable support component

[0051] 61 Fixed end

[0052] 62 Free End

[0053] 63 Supporting the umbrella surface

[0054] 64 Supporting reinforcement

[0055] 65 axis fixing component

[0056] 66 First counterweight

[0057] 67 Flexible blades

[0058] 68 Second counterweight

[0059] 69 Flexible Brushes

[0060] 70 Annular discharge port

[0061] 80 Control Box

[0062] 90 Material drop area Detailed Implementation

[0063] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0064] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and objectives of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0065] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0066] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0067] This application relates to a spreading device and an agricultural unmanned device equipped with the spreading device. The agricultural unmanned device includes agricultural machinery such as agricultural drones and agricultural unmanned vehicles, which realize the automatic spreading of materials such as seeds, fertilizers, pesticides, and feed. The following description uses an agricultural drone as an example of an agricultural unmanned device.

[0068] The agricultural drone involved in this application includes a frame, a material box, and a spreading device. Both the material box and the spreading device are fixedly installed on the frame. The material box contains seeds, fertilizer, pesticides, and other materials. Figure 4 and Figure 5As shown, the spreading device involved in this application includes a material conveying mechanism 20, a discharge cover 30, a throwing disc 10, a throwing disc drive mechanism 40, and a material support mechanism 50. The material conveying mechanism 20 and the discharge cover 30 are both fixedly installed on the frame, thereby the spreading device is installed as a whole on the frame. The material conveying mechanism 20 is provided with an inlet 21 and an outlet 22. The inlet 21 of the material conveying mechanism 20 is connected to the material box. The discharge cover 30 is fixed at the outlet 22 of the material conveying mechanism 20, and the outlet 22 of the material conveying mechanism 20 is connected to the inner cavity of the discharge cover 30. The sling plate 10 is rotatably provided at the lower end of the discharge cover 30 and is connected to the sling plate drive mechanism 40 for transmission. The sling plate 10 is driven to rotate by the sling plate drive mechanism 40. The lower end of the discharge cover 30 is an open structure. The sling plate drive mechanism 40 has a rotating shaft 41 that extends vertically and is rotatably supported in the discharge cover 30. The sling plate 10 is fixed at the lower end of the rotating shaft 41. Specifically, the material support mechanism 50 includes a deformable support member 60 rotatably disposed within the discharge cover 30. The deformable support member 60 is distributed below the discharge port 22 of the material conveying mechanism 20 and above the slinger 10. The deformable support member 60 is higher than the slinger 10 and is coaxially arranged with the slinger 10. The inner end of the deformable support member 60 is a fixed end 61 fixed to the rotating shaft 41, and the outer end of the deformable support member 60 is a free end 62. An annular discharge port 70 is formed between the free end 62 of the deformable support member 60 and the inner wall of the discharge cover 30. The discharge port 22 of the material conveying mechanism 20 communicates with the annular discharge port 70 through the inner cavity of the discharge cover 30. The top surface of the slinger 10 is a diffuse reflective surface, which is distributed directly below the annular discharge port 70.

[0069] The deformable support 60 is used to support the material falling from the outlet 22 of the material conveying mechanism 20. The deformable support 60 automatically deforms under the weight of the material, and the degree of deformation of the deformable support 60 is proportional to the flow rate of the material conveying mechanism 20. Since the free end 62 at the outer end of the deformable support 60 is in a free state, under the deformation action of the deformable support 60, the free end 62 of the deformable support 60 will automatically move towards or away from the inner wall of the discharge cover 30, automatically adjusting the opening size of the annular discharge port 70 so that the opening size of the annular discharge port 70 is adapted to the flow rate of the material conveying mechanism 20. The annular discharge port 70 is an annular gap, and the opening size of the annular discharge port 70 refers to the width of the annular discharge port 70 in the radial direction (i.e., the horizontal direction) of the rotating shaft 41.

[0070] During operation, the material from the agricultural drone's material container enters the material conveying mechanism 20 via its inlet 21. The material is then conveyed to its outlet 22, from which it falls into the discharge cover 30 and onto the deformable support 60. The deformable support 60 deforms according to the weight of the material it supports. When the flow rate of the material conveying mechanism 20 is low, such as... Figure 4 As shown, less material falls from the discharge port 22, the material supported by the deformable support 60 is lighter, the deformation of the deformable support 60 is small, the free end 62 of the deformable support 60 is closer to the inner wall of the discharge cover 30, and the opening size of the annular discharge port 70 is smaller; when the flow rate of the material conveying mechanism 20 is large, such as Figure 5 As shown, a large amount of material falls from the discharge port 22, the material supported by the deformable support 60 is relatively heavy, the deformable support 60 deforms greatly, the free end 62 of the deformable support 60 is relatively far from the inner wall of the discharge cover 30, and the opening size of the annular discharge port 70 is relatively large; finally, the material slides off the deformable support 60 and falls onto the diffuse reflection surface of the sling plate 10 through the annular discharge port 70.

[0071] This application adds a deformable support 60, which rotates coaxially with the throwing disc 10, inside the discharge cover 30 of the spreading device. This has the following advantages: 1. As material slides down from the deformable support 60, under the rotation of the deformable support 60 and the action of the annular discharge port 70, the material fills the entire top surface of the deformable support 60 and flows out from the annular discharge port 70. Thus, the material falls evenly onto the throwing disc 10 and is distributed in a ring shape. Figure 6 As shown, the material falling area 90 on the throwing disc 10 is annular, and the material on the throwing disc 10 is evenly distributed rather than concentrated in one place. Thus, when the material is thrown out by the rotation of the throwing disc 10, the uniformity of the thrown material is improved, thereby increasing the uniformity of material distribution. 2. The degree of deformation of the deformable support 60 and the amount of movement of the free end 62 are adapted to the flow rate of the material conveying mechanism 20 to automatically adjust the opening size of the annular discharge port 70. This allows for better adaptation to different flow rates of the material conveying mechanism 20 without causing material blockage. 3. The automatic adjustment of the opening size of the annular discharge port 70, combined with the rotation of the deformable support 60, allows the material to be more evenly distributed within the annular discharge port 70, thus falling more evenly onto the throwing disc 10, ultimately significantly improving the uniformity of distribution.

[0072] Furthermore, such as Figure 4 and Figure 5As shown, the material conveying mechanism 20 includes a fixedly mounted conveyor housing 23, a horizontally mounted screw feeding unit 24 rotatably supported within the conveyor housing 23, and a conveyor motor 25 and a conveyor drive box 26, both mounted on the conveyor housing 23. The central axis of the screw feeding unit 24 extends horizontally. The conveyor motor 25 is connected to the screw feeding unit 24 via the conveyor drive box 26, driving the screw feeding unit 24 to rotate. Along the feeding direction of the screw feeding unit 24, the two ends of the screw feeding unit 24 are the beginning and the end, respectively, meaning the screw feeding unit 24 conveys material from its beginning to its end. The top of the conveyor housing 23 has an inlet 21 at the beginning of the screw feeding unit 24, and the side of the conveyor housing 23 has an outlet 22 at the end of the screw feeding unit 24. The outlet 22 is close to the discharge cover 30. The conveyor motor 25 and the conveyor drive box 26 are fixed at the end of the conveyor housing 23 away from the discharge cover 30. Preferably, the transmission drive box 26 is a gearbox.

[0073] Furthermore, such as Figure 4 and Figure 5 As shown, the sling drive mechanism 40 also includes a sling motor 42 and a sling rotation drive box 43. Both the sling motor 42 and the sling rotation drive box 43 are fixed to the top of the unloading cover 30. The sling motor 42 is connected to the rotating shaft 41 through the sling rotation drive box 43, driving the rotating shaft 41 to rotate, thereby driving the deformable support 60 and the sling 10 to rotate. Preferably, the sling rotation drive box 43 is a gearbox.

[0074] Furthermore, such as Figure 4 and Figure 5 As shown, a control box 80 is fixed on the outer periphery of the material feeding cover 30. The control box 80 contains a controller. The conveying motor 25 and the sling motor 42 are both connected to the controller for automatic control of the flow rate of the material conveying mechanism 20 and the rotation speed of the sling motor 10, so as to flexibly adjust the material spreading range and improve the flexibility of the spreading operation.

[0075] Furthermore, such as Figure 4 and Figure 5 As shown, the feeding cover 30 includes a cylindrical body 31 and a conical cover 32 fixed to the lower end of the cylindrical body 31. The cylindrical body 31 has a cylindrical structure, and the conical cover 32 has a conical structure. The opening size of the conical cover 32 gradually increases in the direction away from the cylindrical body 31, that is, the conical cover 32 is a trumpet shape with the opening facing downwards. The slinger 10 is retracted inside the conical cover 32, and the lower end of the conical cover 32 is slightly lower than the lower end of the slinger 10. An annular feeding port 70 is formed between the free end 62 of the deformable support 60 and the inner wall of the cylindrical body 31. Of course, in other embodiments, the cylindrical body 31 can be a square column structure, and the conical cover 32 can be a square cone structure.

[0076] Furthermore, such as Figure 6 As shown, the sling plate 10 is disc-shaped and made of metal to enhance its structural strength. Of course, in other embodiments, the sling plate 10 can also be made of plastic. The outer diameter of the sling plate 10 is larger than the inner diameter of the cylindrical body 31, so that the outer edge of the sling plate 10 is distributed on the outer periphery of the annular discharge port 70, allowing all the material to fall onto the sling plate 10.

[0077] Furthermore, the deformable support 60 has multiple embodiments, and three preferred embodiments of the deformable support 60 are provided below.

[0078] Example 1 of deformable support component 60: Figures 7 to 9 As shown, the deformable support 60 has an umbrella-shaped structure. The deformable support 60 includes a support umbrella surface 63 made of flexible material, several supporting ribs 64 circumferentially fixed to the support umbrella surface 63, a shaft fixing member 65 located at the fixed end 61, and a first counterweight 66 fixed at the outer end of each supporting rib 64. The inner circumference of the support umbrella surface 63 is fixed to the shaft fixing member 65, and the shaft fixing member 65 is fixedly sleeved on the outer circumference of the rotating shaft 41. The deformable support 60 is thus fixed to the rotating shaft 41 by the shaft fixing member 65 and rotates together with the spinning disc 10. When no material is falling, the deformable support member 60 of the umbrella-shaped structure fully opens under the action of centrifugal force, with a large unfolding angle. At this time, the free end 62 can abut against the inner wall of the discharge cover 30, or the free end 62 can directly form a small gap with the inner wall of the discharge cover 30. Once material falls on the support umbrella surface 63, the increased weight drives the support umbrella surface 63 to retract towards its central axis, automatically reducing its unfolding angle and forming an annular discharge port 70. This annular discharge port 70 allows the material to flow out and fall onto the diffuse reflective surface of the sling plate 10.

[0079] Preferably, the supporting rib 64 can be a rigid rib or a flexible rib supported by an elastic metal. The flexible material used to make the umbrella surface 63 is preferably a flexible woven material.

[0080] In addition, such as Figure 9 As shown, based on the umbrella-shaped structure of the deformable support 60, the material support mechanism 50 also includes a support sleeve 51 slidably sleeved on the rotating shaft 41, a spring 52 sleeved on the rotating shaft 41, and a support connecting rod 53 connecting the support sleeve 51 and each support rib 64. The two ends of the support connecting rod 53 are hinged to the support sleeve 51 and the support rib 64 respectively. One end of the spring 52 is fixed to the rotating shaft 41, and the other end of the spring 52 acts on the support sleeve 51. After the spreading is completed, the force applied to the support ribs 64 by the spring 52, the support sleeve 51, and the support connecting rod 53 can better drive the deformable support 60 back to its initial state.

[0081] Example 2 of deformable support component 60: Figure 10As shown, the deformable support 60 is a blade structure, comprising several circumferentially distributed flexible blades 67, a shaft fixing member 65 located at the fixed end 61, and a second counterweight 68 fixed at the outer end of each flexible blade 67. The inner ends of the flexible blades 67 are fixed to the shaft fixing member 65, which is fixedly sleeved on the outer circumference of the rotating shaft 41. When no material falls, the deformable support 60 of the blade structure is fully open in its initial state with a large unfolding angle. At this time, the free end 62 can abut against the inner wall of the discharge cover 30, or the free end 62 can directly form a small gap with the inner wall of the discharge cover 30. Once material falls on the flexible blades 67, the increased weight drives the flexible blades 67 to bend and deform downwards. The multiple flexible blades 67 retract, automatically reducing their unfolding angle to form an annular discharge port 70. The material flows out from the annular discharge port 70 and falls onto the diffuse reflective surface of the slinger 10. Furthermore, there is a portion of the flexible blades 67 stacked vertically between adjacent flexible blades 67. The flexible blades 67 are preferably elastic metal sheets.

[0082] Example 3 of deformable support component 60: Figure 11 As shown, the deformable support 60 is a brush structure, comprising several circumferentially distributed flexible brushes 69 and a shaft fixing member 65 located at the fixed end 61. The inner ends of the flexible brushes 69 are fixed to the shaft fixing member 65, which is fixedly sleeved on the outer circumference of the rotating shaft 41. When no material falls, the deformable support 60 of the brush structure is fully open in its initial state with a large unfolding angle. At this time, the free end 62 can abut against the inner wall of the discharge cover 30, or the free end 62 can directly form a small gap with the inner wall of the discharge cover 30. Once material falls on the flexible brushes 69, the increased weight drives the flexible brushes 69 to bend and deform downward, automatically reducing their unfolding angle to form an annular discharge port 70. The material flows out from the annular discharge port 70 and falls onto the diffuse reflection surface of the slinger 10. In addition, the flexible brushes 69 can be a multi-layered structure with each layer of flexible brushes 69 sparsely arranged. The flexible brush 69 is preferably made of rubber.

[0083] In summary, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0084] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A spreading device, comprising a material conveying mechanism (20) having an inlet (21) and an outlet (22), a discharge cover (30) fixed at the outlet (22) of the material conveying mechanism (20), a rotatable slinger (10), and a slinger drive mechanism (40) pulverizedly connected to the slinger (10), the slinger drive mechanism (40) having a rotating shaft (41) rotatably supported in the discharge cover (30), the slinger (10) being fixed to the rotating shaft (41), characterized in that: It also includes a material support mechanism (50), which includes a deformable support member (60) rotatably disposed in the discharge cover (30). The deformable support member (60) is distributed below the discharge port (22) of the material conveying mechanism (20) and coaxially disposed above the slinger (10). The inner end of the deformable support member (60) is a fixed end (61) fixed to the rotating shaft (41), and the outer end of the deformable support member (60) is a free end (62). An annular discharge port (70) is formed between the free end (62) and the inner wall of the discharge cover (30). The discharge port (22) of the material conveying mechanism (20) communicates with the annular discharge port (70) through the inner cavity of the discharge cover (30). The deformable support (60) automatically deforms under the weight of the material, and the degree of deformation of the deformable support (60) is proportional to the flow rate of the material conveying mechanism (20), so that the opening size of the annular discharge port (70) is adapted to the flow rate of the material conveying mechanism (20).

2. The spreading device according to claim 1, characterized in that: The deformable support member (60) includes a support umbrella surface (63) made of flexible material, several support ribs (64) circumferentially fixed to the support umbrella surface (63), a shaft fixing member (65) provided at the fixed end (61), and a first counterweight (66) fixed at the outer end of each support rib (64). The inner circumference of the support umbrella surface (63) is fixed to the shaft fixing member (65), and the shaft fixing member (65) is fixedly sleeved on the outer circumference of the rotating shaft (41).

3. The spreading device according to claim 1, characterized in that: The deformable support (60) includes several circumferentially distributed flexible blades (67), a shaft fixing member (65) provided at the fixed end (61), and a second counterweight (68) fixed at the outer end of each flexible blade (67). The inner ends of the several flexible blades (67) are fixed to the shaft fixing member (65), and the shaft fixing member (65) is fixedly sleeved on the outer periphery of the rotating shaft (41).

4. The spreading device according to claim 1, characterized in that: The deformable support (60) includes several circumferentially distributed flexible brushes (69) and a shaft fixing member (65) provided at the fixed end (61). The inner ends of the several flexible brushes (69) are fixed to the shaft fixing member (65), and the shaft fixing member (65) is fixedly sleeved on the outer periphery of the rotating shaft (41).

5. The spreading device according to claim 1, characterized in that: The material conveying mechanism (20) includes a fixedly installed conveyor housing (23), a horizontally arranged spiral feeding unit (24) rotatably supported inside the conveyor housing (23), and a conveyor motor (25) and a conveyor drive box (26) both installed in the conveyor housing (23). The conveyor motor (25) is connected to the spiral feeding unit (24) through the conveyor drive box (26). The top of the conveyor housing (23) is provided with the feed inlet (21) at the beginning of the spiral feeding unit (24), and the side of the conveyor housing (23) is provided with the discharge outlet (22) at the end of the spiral feeding unit (24).

6. The spreading device according to claim 1, characterized in that: The sling drive mechanism (40) also includes a sling motor (42) and a sling rotation drive box (43) both fixed to the unloading cover (30). The sling motor (42) is connected to the rotating shaft (41) through the sling rotation drive box (43).

7. The spreading device according to claim 1, characterized in that: A control box (80) is fixed to the outer periphery of the unloading cover (30), and a controller is installed inside the control box (80).

8. The spreading device according to claim 1, characterized in that: The discharge cover (30) includes a cylindrical body (31) and a conical cover (32) fixed at the lower end of the cylindrical body (31). The size of the opening of the conical cover (32) gradually increases in the direction away from the cylindrical body (31). The slinger (10) is retracted into the conical cover (32). The annular discharge port (70) is formed between the free end (62) and the inner wall of the cylindrical body (31).

9. An unmanned plant protection device, comprising a frame and a material box fixedly installed on the frame, characterized in that: It also includes the spreading device according to any one of claims 1-8, wherein the material conveying mechanism (20) and the discharge cover (30) are both fixedly installed on the frame, and the material box is connected to the feed port (21) of the material conveying mechanism (20).

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