Sowing device and plant protection unmanned equipment

Abstract

The invention provides a sowing device and unmanned equipment for plant protection, the sowing device comprises a material conveying mechanism provided with a feeding port and a discharging port, a blanking housing fixedly arranged at the discharging port of the material conveying mechanism, a rotatable throwing disc, a throwing disc driving mechanism in transmission connection with the throwing disc, and a material supporting mechanism, the throwing disc driving mechanism is provided with a rotating shaft, and the rotating shaft is provided with a rotating shaft; the projecting disc is fixed on the rotating shaft; the material supporting mechanism comprises a deformation bearing piece, the inner end of the deformation bearing piece is a fixed end fixed to the rotating shaft, the outer end of the deformation bearing piece is a free end, an annular discharging opening is formed between the free end and the inner wall of the discharging cover shell, and the deformation bearing piece automatically deforms under the effect of the weight of materials. And the deformation degree of the deformation bearing piece is in direct proportion to the flow of the material conveying mechanism, so that the opening size of the annular discharging opening is adaptive to the flow of the material conveying mechanism. Under the rotation action of the deformation bearing piece and the action of the annular discharging opening, the materials on the throwing disc are evenly distributed, and therefore the uniformity of the thrown materials is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and in particular to a spreading device and a plant protection unmanned device equipped with the spreading device. Background Art

[0002] As an important tool for modern agriculture, plant protection unmanned devices (such as plant protection drones, plant protection unmanned vehicles, etc.) can efficiently and accurately complete operations such as pesticide spraying, sowing, and fertilizing, effectively reducing the labor intensity of workers, greatly improving the operation efficiency, and being able to operate flexibly in farmland environments of various terrains. Plant protection unmanned devices have been widely used in the field of forest and agricultural plant protection operations, providing efficient and convenient operation methods, and effectively promoting the mechanization, intelligentization, and modernization of agriculture.

[0003] Generally, a spreading device is mounted on a plant protection unmanned device for spreading materials in the form of granules and powders, and is used in operation scenarios such as sowing and fertilizing. The structure of the existing spreading device is as Figure 1 shown. The spreading device includes a spiral feeder 100, a feeding cover 200, a rotatable throwing disc 300, and a throwing disc driving mechanism 400 for driving the throwing disc 300 to rotate. Materials enter through the feeding port of the spiral feeder 100 and are conveyed to the discharging port of the spiral feeder 100. The materials fall from the discharging port into the feeding cover 200 and then fall from the discharging port at the lower end of the feeding cover 200 onto the throwing disc 300. The throwing disc driving mechanism 400 drives the throwing disc 300 to rotate, and under the action of centrifugal force, the materials on the throwing disc 300 are thrown out to achieve automatic spreading or automatic fertilizing.

[0004] However, the above existing spreading device has the following defects in actual use: when the spiral feeder 100 discharges materials, in the case of a relatively small flow rate, the materials will flow out closely along the discharging port of the spiral feeder 100, resulting in the materials falling on the throwing disc 300 being biased to one side of the throwing disc 300, as Figure 2 shown. In addition, when the spiral feeder 100 discharges materials, due to the threaded opening at its discharging port, the materials will start to be discharged when passing through the lowest part of the discharging port, as Figure 3 shown. Combining with the rotation of the spiral feeder 100 driving the materials to rotate together, it causes the discharging position of the materials to be biased to one side, and further causes the materials to fall on the throwing disc 300 being biased to one side of the throwing disc 300, as Figure 2 shown. Finally, the above two factors result in uneven distribution of the materials on the throwing disc 300 after falling. There is a concentrated area 301 of material landing points on the throwing disc 300, and the distribution of the materials on the throwing disc 300 after being thrown out under the action of centrifugal force is also uneven. Most of the materials are concentrated on one side area of the throwing disc 300, and there are a material dense distribution area 302 and a material sparse distribution area 303 in the operation area.

[0005] Therefore, the existing spreading device has the defect of uneven spreading of materials, which affects the accuracy of spreading. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a spreading device to effectively improve the uniformity of material spreading.

[0007] To achieve the above-mentioned purpose, the present invention provides a spreading device, comprising a material conveying mechanism provided with a feed inlet and a discharge outlet, a discharge cover shell fixedly arranged at the discharge outlet of the material conveying mechanism, a rotatable throwing disc, and a throwing disc driving mechanism transmission-connected to the throwing disc, the throwing disc driving mechanism having a rotating shaft rotatably supported in the discharge cover shell, and the throwing disc being fixed to the rotating shaft; the spreading device also includes a supporting mechanism, the supporting mechanism comprising a deformable supporting member rotatably arranged in the discharge cover shell, the deformable supporting member being distributed on the lower side of the discharge outlet of the material conveying mechanism and being coaxially arranged on the upper side of the throwing disc, the inner end of the deformable supporting member being a fixed end fixed to the rotating shaft, the outer end of the deformable supporting member being a free end, an annular discharge outlet being formed between the free end and the inner wall of the discharge cover shell, and the discharge outlet of the material conveying mechanism being communicated with the annular discharge outlet through the inner cavity of the discharge cover shell;

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

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

[0010] Furthermore, the deformation supporting member includes a plurality of circumferentially distributed flexible blades, an axis fixing member arranged at the fixed end, and a second counterweight fixed at the outer end of each of the flexible blades, the inner ends of the plurality of flexible blades are fixed to the axis fixing member, and the axis fixing member is fixedly sleeved on the outer periphery of the rotating shaft.

[0011] Furthermore, the deformation supporting member includes a plurality of circumferentially distributed flexible brushes and an axis fixing member arranged at the fixed end, the inner ends of the plurality of flexible brushes are fixed to the axis fixing member, and the axis fixing member is fixedly sleeved on the outer circumference of the rotating shaft.

[0012] Furthermore, the material conveying mechanism includes a fixed conveying casing, a spiral feeding unit rotatably supported in the conveying casing and horizontally arranged, and a conveying motor and a conveying drive box both installed on the conveying casing, the conveying motor is transmission-connected to the spiral feeding unit through the conveying drive box, the top of the conveying casing is provided with the feed port at the head end of the spiral feeding unit, and the side of the conveying casing is provided with the discharge port at the tail end of the spiral feeding unit.

[0013] Furthermore, the spinning disc driving mechanism also includes a spinning disc motor and a spinning disc rotation driving box both fixed to the unloading cover shell, and the spinning disc motor is transmission-connected to the rotating shaft through the spinning disc rotation driving box.

[0014] Furthermore, a control box is fixed to the outer peripheral side of the unloading cover shell, and a controller is loaded in the control box.

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

[0016] The present application also provides an unmanned crop protection equipment, including a frame, a material box fixedly installed on the frame, and the spreading device as described above, the material conveying mechanism and the material discharge cover shell 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 spreading device and unmanned plant protection equipment according to the present invention have the following beneficial effects:

[0018] The material slides down from the deformable supporting member, and the opening size of the annular discharge port is automatically adjusted. Under the action of the rotation of the deformable supporting member and the annular discharge port, the material is evenly distributed on the spinner, thereby improving the uniformity of the thrown material and thus improving the uniformity of the material spreading. In addition, the degree of deformation of the deformable supporting member and the movement of the free end are self-adapted to the flow rate of the material conveying mechanism to automatically adjust the opening size of the annular discharge port, which can be better used for different flow rates of the material conveying mechanism without causing blockage. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 for Figure 1 Schematic diagram of material biased to one side of the spinner during operation of the mid-spreader.

[0021] Figure 3 is Figure 1 a schematic diagram showing the discharge of materials from the discharge port of the spiral discharger.

[0022] Figure 4 is a schematic structural diagram of the spreading device of the present application, in which the material conveying mechanism has a small flow rate in this figure.

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

[0024] Figure 6 is a schematic diagram showing the throwing out of materials on the throwing disc during the operation of the spreading device of the present application.

[0025] Figure 7 is a schematic structural diagram of the first embodiment of the deformable support member in the spreading device of the present application.

[0026] Figure 8 is Figure 7 the top view of

[0027] Figure 9 is Figure 7 the operation schematic diagram of

[0028] Figure 10 is a schematic structural diagram of the second embodiment of the deformable support member in the spreading device of the present application.

[0029] Figure 11 is a schematic structural diagram of the third embodiment of the deformable support member in the spreading device of the present application.

[0030] Description of Component Labels

[0031] 10 Throwing Disc

[0032] 20 Material Conveying Mechanism

[0033] 21 Feed Inlet

[0034] 22 Discharge Outlet

[0035] 23 Conveyor Housing

[0036] 24 Screw Feeding Unit

[0037] 25 Conveyor Motor

[0038] 26 Conveyor Drive Box

[0039] 30 Feeding Hood

[0040] 31 Cylindrical Barrel

[0041] 32 Conical Hood

[0042] 40 Throwing Disc Drive Mechanism

[0043] 41 Rotating shaft

[0044] 42 Turntable motor

[0045] 43 Turntable rotation drive box

[0046] 50 Stock supporting mechanism

[0047] 51 Supporting sliding sleeve

[0048] 52 Spring

[0049] 53 Supporting connecting rod

[0050] 60 Deformable supporting member

[0051] 61 Fixed end

[0052] 62 Free end

[0053] 63 Supporting umbrella surface

[0054] 64 Supporting rib

[0055] 65 Shaft fixing member

[0056] 66 First counterweight

[0057] 67 Flexible blade

[0058] 68 Second counterweight

[0059] 69 Flexible brush

[0060] 70 Annular blanking port

[0061] 80 Control box

[0062] 90 Material falling area Specific implementation mode

[0063] The following specific embodiments illustrate the implementation modes 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 noted that the structures, proportions, sizes, etc. depicted in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have any technical substantial meaning. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear description and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0065] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element present at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or it can also be indirectly connected to the other element through an intermediate element.

[0066] In addition, the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0067] This application relates to a spreading device and a plant protection unmanned device equipped with the spreading device. The plant protection unmanned device is an agricultural instrument such as a plant protection unmanned aerial vehicle or a plant protection unmanned vehicle, which realizes the automatic spreading of materials such as seeds, fertilizers, pesticides, and feeds. The following takes the plant protection unmanned aerial vehicle as an example to expand the description.

[0068] The plant protection unmanned aerial vehicle involved in this application includes a frame, a material box, and a spreading device. The material box and the spreading device are both fixedly installed on the frame, and the material box is loaded with materials such as seeds, fertilizers, and pesticides. As Figure 4 and Figure 5As shown in the figure, the sowing device involved in the present application includes a material conveying mechanism 20, a blanking housing 30, a throwing disc 10, a throwing disc driving mechanism 40, and a material supporting mechanism 50. The material conveying mechanism 20 and the blanking housing 30 are both fixedly installed on the frame, thereby installing the sowing device as a whole on the frame. The material conveying mechanism 20 is provided with a feed inlet 21 and a discharge outlet 22, and the feed inlet 21 of the material conveying mechanism 20 is communicated with the material box; the blanking housing 30 is fixedly arranged at the discharge outlet 22 of the material conveying mechanism 20, so the discharge outlet 22 of the material conveying mechanism 20 is communicated with the inner cavity of the blanking housing 30; the throwing disc 10 is rotatably arranged at the lower end of the blanking housing 30 and is in transmission connection with the throwing disc driving mechanism 40. The throwing disc driving mechanism 40 drives the throwing disc 10 to rotate. The lower end of the blanking housing 30 is an open structure; the throwing disc driving mechanism 40 has a rotating shaft 41 that extends vertically and is rotatably supported in the blanking housing 30, and the throwing disc 10 is fixed to the lower end of the rotating shaft 41. Particularly, the material supporting mechanism 50 includes a deformable supporting member 60 that is rotatably arranged in the blanking housing 30. The deformable supporting member 60 is distributed on the lower side of the discharge outlet 22 of the material conveying mechanism 20 and above the throwing disc 10. The deformable supporting member 60 is higher than the throwing disc 10 as a whole. The deformable supporting member 60 is coaxially arranged with the throwing disc 10. The inner end of the deformable supporting member 60 is a fixed end 61 fixed to the rotating shaft 41, and the outer end of the deformable supporting member 60 is a free end 62. An annular blanking port 70 is formed between the free end 62 of the deformable supporting member 60 and the inner wall of the blanking housing 30. The discharge outlet 22 of the material conveying mechanism 20 is communicated with the annular blanking port 70 through the inner cavity of the blanking housing 30. The top surface of the throwing disc 10 is a diffuse reflection surface, and the diffuse reflection surface is distributed directly below the annular blanking port 70.

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

[0070] During the operation of the above-mentioned spreading device, the materials in the material box of the plant protection UAV enter the material conveying mechanism 20 through the feeding port 21 provided on the material conveying mechanism 20, and the material conveying mechanism 20 conveys the materials to its discharging port 22. The materials fall from the discharging port 22 of the material conveying mechanism 20 into the blanking housing 30 and land on the deformable supporting member 60. The deformable supporting member 60 deforms with the weight of the supported materials: when the flow rate of the material conveying mechanism 20 is small, as Figure 4 shown, less materials fall from the discharging port 22, the weight of the materials supported by the deformable supporting member 60 is light, the deformable supporting member 60 deforms little, the free end 62 of the deformable supporting member 60 is relatively close to the inner wall of the blanking housing 30, and the opening size of the annular blanking port 70 is small; when the flow rate of the material conveying mechanism 20 is large, as Figure 5 shown, more materials fall from the discharging port 22, the weight of the materials supported by the deformable supporting member 60 is heavy, the deformable supporting member 60 deforms greatly, the free end 62 of the deformable supporting member 60 is relatively far from the inner wall of the blanking housing 30, and the opening size of the annular blanking port 70 is large; finally, the materials slide off the deformable supporting member 60 and fall onto the diffuse reflection surface of the throwing disc 10 through the annular blanking port 70.

[0071] After adding the deformable supporting member 60 that rotates coaxially with the throwing disc 10 in the blanking housing 30 of the spreading device in this application, the following advantages are achieved: 1. The materials slide down from the deformable supporting member 60. Under the action of the rotation of the deformable supporting member 60 and the annular blanking port 70, the materials fill the entire top surface of the deformable supporting member 60 and flow out from the annular blanking port 70, so that the materials fall evenly on the throwing disc 10 and are distributed in a ring shape, as Figure 6 shown, the material falling area 90 on the throwing disc 10 is annular, and the materials on the throwing disc 10 are evenly distributed instead of concentrated in a certain place; in this way, when the materials on the throwing disc 10 are thrown out by the rotation of the throwing disc 10, the uniformity of the thrown materials can be improved, thereby improving the uniformity of material spreading. 2. The degree of deformation of the deformable supporting member 60 and the movement amount of the free end 62 are self-adapted to the flow rate of the material conveying mechanism 20 to automatically adjust the opening size of the annular blanking port 70, and it can be well applied to different flow rates of the material conveying mechanism 20 without jamming. 3. The opening size of the annular blanking port 70 is automatically adjusted, combined with the rotation of the deformable supporting member 60, which can make the materials more evenly distributed in the annular blanking port 70, and thus fall more evenly on the throwing disc 10, ultimately greatly improving the spreading uniformity.

[0072] Furthermore, as Figure 4 and Figure 5As shown, the material conveying mechanism 20 includes a fixed conveying housing 23, a spiral feeding unit 24 rotatably supported in the conveying housing 23 and arranged horizontally, and a conveying motor 25 and a conveying drive box 26 both mounted on the conveying housing 23. The central axis of the spiral feeding unit 24 extends horizontally. The conveying motor 25 is connected to the spiral feeding unit 24 through the conveying drive box 26 to drive the spiral feeding unit 24 to rotate. Along the feeding direction of the spiral feeding unit 24, the two ends of the spiral feeding unit 24 are respectively the head end and the tail end, that is, the spiral feeding unit 24 conveys the material from its head end to its tail end; the top of the conveying housing 23 is provided with a feed port 21 at the head end of the spiral feeding unit 24, and the side of the conveying housing 23 is provided with a discharge port 22 at the tail end of the spiral feeding unit 24, and the discharge port 22 is close to the unloading cover 30. The conveying motor 25 and the conveying drive box 26 are fixed at one end of the conveying housing 23 away from the unloading cover 30. Preferably, the transmission drive box 26 is a gear box.

[0073] Furthermore, if Figure 4 and Figure 5 As shown, the spinning disc driving mechanism 40 also includes a spinning disc motor 42 and a spinning disc rotation driving box 43, both of which are fixed to the top of the unloading cover shell 30, and the spinning disc motor 42 is connected to the rotating shaft 41 through the spinning disc rotation driving box 43, driving the rotating shaft 41 to rotate, thereby driving the deformation support member 60 and the spinning disc 10 to rotate. Preferably, the spinning disc rotation driving box 43 is a gear box.

[0074] Furthermore, if Figure 4 and Figure 5 As shown, a control box 80 is fixed on the outer peripheral side of the discharge cover shell 30, and a controller is loaded in the control box 80. The conveying motor 25 and the swing plate motor 42 are both communicated with the controller for automatically controlling the flow rate of the material conveying mechanism 20 and the rotation speed of the swing plate 10, flexibly adjusting the material spreading range, and improving the flexibility of the spreading operation.

[0075] Furthermore, if Figure 4 and Figure 5 As shown, the material discharge housing 30 includes a cylindrical body 31 and a conical body 32 fixed at the lower end of the cylindrical body 31. The cylindrical body 31 is a cylindrical structure, and the conical body 32 is a conical structure. The opening size of the conical body 32 gradually increases in the direction away from the cylindrical body 31, that is, the conical body 32 is a trumpet-shaped opening facing downward, and the spinning disc 10 is folded in the conical body 32. The lower end of the conical body 32 is slightly lower than the lower end of the spinning disc 10; the annular material discharge port 70 is formed between the free end 62 of the deformable support member 60 and the inner wall of the cylindrical body 31. Of course, in other embodiments, the cylindrical body 31 can be a square columnar structure, and the conical body 32 can be a square conical structure.

[0076] Furthermore, ifFigure 6 As shown, the throwing disc 10 is disc-shaped and made of metal to enhance its structural strength. Of course, in other embodiments, the throwing disc 10 can also be a plastic disc. The outer diameter of the throwing disc 10 is larger than the inner diameter of the cylindrical barrel 31, so that the outer edge of the throwing disc 10 is distributed on the outer peripheral side of the annular blanking port 70, enabling all the materials to fall onto the throwing disc 10.

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

[0078] Embodiment 1 of the deformable support member 60: As Figures 7 to 9 shown, the deformable support member 60 has an umbrella-like structure. The deformable support member 60 includes a support umbrella surface 63 made of a 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 fixedly provided at the outer ends of the respective support ribs 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 member 60 is integrally fixed to the rotating shaft 41 through the shaft fixing member 65 and rotates together with the throwing disc 10. When no material is falling, the umbrella-like deformable support member 60 is fully opened under the action of centrifugal force and has a relatively large unfolding angle. At this time, the free end 62 can abut against the inner wall of the blanking housing 30, or there can be a small gap directly formed between the free end 62 and the inner wall of the blanking housing 30. Once material falls on the support umbrella surface 63, the increased weight causes the support umbrella surface 63 to converge towards its central axis, automatically reducing its unfolding angle to form an annular blanking port 70, which allows the material to flow out and fall onto the diffuse reflection surface of the throwing disc 10.

[0079] Preferably, the support ribs 64 can be rigid rib strips or flexible rib strips supported by elastic metals. The flexible material for making the support umbrella surface 63 is preferably a flexible woven material.

[0080] In addition, as Figure 9 shown, based on the umbrella-like structure of the deformable support member 60, the material supporting mechanism 50 further includes a support sliding sleeve 51 slidably sleeved on the rotating shaft 41, a spring 52 sleeved on the rotating shaft 41, and a support connecting rod 53 connected between the support sliding sleeve 51 and the respective support ribs 64. The two ends of the support connecting rod 53 are respectively hinged to the support sliding sleeve 51 and the support rib 64. 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 sliding sleeve 51. After the sowing is completed, the acting force exerted on the support ribs 64 by the spring 52, the support sliding sleeve 51, and the support connecting rod 53 can better drive the deformable support member 60 to return to its initial state.

[0081] Embodiment 2 of the deformable support member 60: As Figure 10As shown, the deformable support member 60 is a blade structure. The deformable support member 60 includes several flexible blades 67 distributed circumferentially, a shaft fixing member 65 provided at the fixed end 61, and a second counterweight 68 fixedly provided at the outer ends of the flexible blades 67. The inner ends of the several flexible blades 67 are all 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. When there is no material falling, the deformable support member 60 of the blade structure is fully opened in the initial state and has a large unfolding angle. At this time, the free end 62 can abut against the inner wall of the blanking housing 30, or there can be a small gap directly formed between the free end 62 and the inner wall of the blanking housing 30. Once there is material falling on the flexible blades 67, the increased weight drives the flexible blades 67 to bend downward and deform, and the multiple flexible blades 67 fold up, automatically reducing their unfolding angle to form an annular blanking port 70, and the material flows out from the annular blanking port 70 and falls onto the diffuse reflection surface of the throwing disc 10. In addition, a part of adjacent two flexible blades 67 overlaps up and down. The flexible blade 67 is preferably an elastic metal sheet.

[0082] Embodiment Three of the Deformable Support Member 60: As Figure 11 shown, the deformable support member 60 is a brush structure. The deformable support member 60 includes several flexible brushes 69 distributed circumferentially and a shaft fixing member 65 provided at the fixed end 61. The inner ends of the several flexible brushes 69 are all 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. When there is no material falling, the deformable support member 60 of the brush structure is fully opened in the initial state and has a large unfolding angle. At this time, the free end 62 can abut against the inner wall of the blanking housing 30, or there can be a small gap directly formed between the free end 62 and the inner wall of the blanking housing 30. Once there is material falling on the flexible brushes 69, the increased weight drives the flexible brushes 69 to bend downward and deform, automatically reducing their unfolding angle to form an annular blanking port 70, and the material flows out from the annular blanking port 70 and falls onto the diffuse reflection surface of the throwing disc 10. In addition, the flexible brushes 69 can be a multi-layer structure with upper and lower layers overlapping, and the flexible brushes 69 of each layer are sparsely arranged. The flexible brush 69 is preferably made of rubber material.

[0083] In summary, the present invention effectively overcomes various drawbacks in the prior art and has high industrial utilization value.

[0084] The above embodiments are only illustrative of the principles and effects of the present invention, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by 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) provided with a feeding port (21) and a discharging port (22), a blanking housing (30) fixedly arranged at the discharging port (22) of the material conveying mechanism (20), a rotatable throwing disc (10), and a throwing disc driving mechanism (40) in transmission connection with the throwing disc (10). The throwing disc driving mechanism (40) has a rotating shaft (41) rotatably supported in the blanking housing (30), and the throwing disc (10) is fixed to the rotating shaft (41), characterized in that: The material supporting mechanism (50) further comprises a material supporting mechanism (50), the material supporting mechanism (50) comprising a deformable supporting member (60) rotatably arranged in the material discharging cover shell (30), the deformable supporting member (60) being distributed on the lower side of the material discharging port (22) of the material conveying mechanism (20) and being coaxially arranged on the upper side of the spinning plate (10), the inner end of the deformable supporting member (60) being a fixed end (61) fixed to the rotating shaft (41), the outer end of the deformable supporting member (60) being a free end (62), an annular material discharging port (70) being formed between the free end (62) and the inner wall of the material discharging cover shell (30), the material discharging port (22) of the material conveying mechanism (20) being in communication with the annular material discharging port (70) via the inner cavity of the material discharging cover shell (30); The deformable support member (60) automatically deforms under the weight of the material, and the degree of deformation of the deformable support member (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 automatically adapted to the flow rate of the material conveying mechanism (20).

2. The seeding device according to claim 1, wherein: The deformable supporting member (60) comprises a supporting umbrella surface (63) made of a flexible material, a plurality of supporting ribs (64) circumferentially fixed to the supporting umbrella surface (63), an axis fixing member (65) arranged 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 supporting umbrella surface (63) is fixed to the axis fixing member (65), and the axis fixing member (65) is fixedly sleeved on the outer circumference of the rotating shaft (41).

3. The sowing device according to claim 1, characterized in that: The deformation support member (60) comprises a plurality of circumferentially distributed flexible blades (67), an axis fixing member (65) arranged at the fixed end (61), and a second counterweight (68) fixedly arranged at the outer end of each of the flexible blades (67), the inner ends of the plurality of flexible blades (67) are fixed to the axis fixing member (65), and the axis fixing member (65) is fixedly sleeved on the outer circumference of the rotating shaft (41).

4. The sowing device according to claim 1, characterized in that: The deformation support member (60) comprises a plurality of circumferentially distributed flexible brushes (69) and an axis fixing member (65) arranged at the fixed end (61), the inner ends of the plurality of flexible brushes (69) are fixed to the axis fixing member (65), and the axis fixing member (65) is fixedly sleeved on the outer circumference of the rotating shaft (41).

5. The sowing device according to claim 1, characterized in that: The material conveying mechanism (20) comprises a fixed conveying casing (23), a spiral feeding unit (24) rotatably supported in the conveying casing (23) and arranged horizontally, and a conveying motor (25) and a conveying drive box (26) both mounted on the conveying casing (23); the conveying motor (25) is transmission-connected to the spiral feeding unit (24) via the conveying drive box (26); the top of the conveying casing (23) is provided with the feeding port (21) at the head end of the spiral feeding unit (24); and the side of the conveying casing (23) is provided with the discharging port (22) at the tail end of the spiral feeding unit (24).

6. The sowing device according to claim 1, characterized in that: The disc driving mechanism (40) further includes a disc motor (42) and a disc rotation driving box (43) both fixed to the blanking housing (30), and the disc motor (42) is in transmission connection with the rotating shaft (41) through the disc rotation driving box (43).

7. The sowing device according to claim 1, characterized in that: A control box (80) is fixed to the outer peripheral side of the blanking housing (30), and a controller is loaded in the control box (80).

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

9. A plant protection unmanned device, comprising a frame and a material box fixedly installed on the frame, characterized in that: It further includes the sowing device according to any one of claims 1-8. The material conveying mechanism (20) and the blanking housing (30) are both fixedly installed on the frame, and the material box is communicated with the feeding port (21) of the material conveying mechanism (20).

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