Feeding device and unmanned aerial vehicle

Abstract

The present invention provides a feeding device and an unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicles. The feeding device includes a shell, a drive shaft and a conveying assembly. A feeding channel is provided in the shell; the drive shaft is rotatably connected to the shell. The conveying assembly is arranged in the feeding channel. The conveying assembly includes an output part, a transmission part and a sealing part; the transmission part is connected to the drive shaft; the sealing part is arranged on the radial outer periphery of the transmission part, and at least part of the sealing part is biased toward the drive shaft; the output part is connected to the transmission part so that the output part rotates with the transmission part. A sealing groove is also provided on the inner side wall of the shell; the sealing part is accommodated in the sealing groove, and a gap is formed between the sealing part and the sealing groove. The unmanned aerial vehicle provided by the present invention adopts the above-mentioned feeding device. The feeding device and the unmanned aerial vehicle provided by the present invention can improve the technical problem in the prior art that materials entering the bearing or the gap around the bearing can easily cause bearing damage.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and in particular to a feeding device and an unmanned aerial vehicle. Background Art

[0002] With the development of science and technology, more and more intelligent machines are replacing manual labor. Intelligent machines can not only maintain the consistency of operations to ensure the stability of continuous operations, but also can perform operations at inconvenient times and places for manual labor, saving a lot of labor consumption and improving work efficiency.

[0003] For example, in the prior art, drones are increasingly being used in various fields. For example, in the agricultural field, drones have been put into practical use in a wide range of fields for spreading operations. In the prior art, during the spreading operation of drones, since the end of the conveying auger is rotatably matched through a bearing, the gap formed between the bearing and the housing is prone to material entering, thereby affecting the rotation of the conveying auger and even causing damage to the bearing. Summary of the invention

[0004] The purpose of the present invention includes providing a feeding device which can improve the technical problem in the prior art that materials enter the bearing or the gap around the bearing and easily cause damage to the bearing.

[0005] The purpose of the present invention also includes providing a drone that can improve the technical problem in the prior art that materials enter the bearings or the gaps around the bearings, which can easily cause bearing damage.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] An embodiment of the present invention provides a feeding device, which is applied to a spreading system of a drone, and the feeding device includes a housing, a drive shaft, and a conveying assembly;

[0008] A feeding channel is provided in the shell; the driving shaft is rotatably connected to the shell;

[0009] The conveying assembly is arranged inside the feeding channel, and the conveying assembly includes an output part, a transmission part and a sealing part; the transmission part is connected to the driving shaft so that the transmission part rotates following the driving shaft; the sealing part is arranged on the radial outer periphery of the transmission part, and at least part of the sealing part is biased toward the driving shaft; the output part is connected to the transmission part so that the output part rotates following the transmission part;

[0010] A sealing groove is also formed on the inner side wall of the shell; the sealing portion is accommodated in the sealing groove, and a gap is formed between the sealing portion and the sealing groove.

[0011] The beneficial effects of the feeding device provided by the present invention compared with the prior art include:

[0012] In the feeding device, the driving shaft can rotate relative to the housing, and at the same time drive the transmission part to rotate. When the transmission part rotates, it can drive the sealing part and the output part to rotate, and the material can be transported during the rotation of the output part. In addition, since at least part of the sealing part is arranged to one side of the driving shaft, when the sealing part cooperates with the sealing groove, at least part of the sealing part can form a circuitous gap with the peripheral wall of the sealing groove, thereby increasing the difficulty of the material passing through the gap, and preventing the material from passing through the gap into the inside of the bearing or into the gap around the bearing, thereby avoiding the material from damaging the bearing. Therefore, the technical problem in the prior art that the material enters the bearing or the gap around the bearing and easily causes the bearing to be damaged can be improved.

[0013] Optionally, the sealing portion includes a first sealing member and a second sealing member; the first sealing member is arranged on the outer side of the transmission portion, and the first sealing member forms an angle with the axis of the transmission portion; the second sealing member is arranged on the first sealing member, and the second sealing member forms an angle with the first sealing member;

[0014] A first cavity and a second cavity are formed inside the sealing groove; the first cavity accommodates the first sealing member; and the second cavity accommodates the second sealing member.

[0015] Among them, a gap is formed between the first seal and the peripheral wall surrounding the first cavity, and a gap is formed between the second seal and the peripheral wall surrounding the second cavity. In addition, since the first seal and the second seal form an angle, an angle is formed between some of the gaps, so that the gap between the sealing part and the sealing groove is maze-shaped, thereby increasing the difficulty of materials passing through the gap, thereby preventing materials from entering the inside of the bearing or entering the gap around the bearing, thereby providing effective protection for the bearing, thereby improving the technical problem in the prior art that materials entering the bearing or the gap around the bearing can easily cause damage to the bearing.

[0016] Optionally, the second sealing member is in a straight cylindrical shape, and an axis of the second sealing member is colinear with an axis of the transmission part.

[0017] Optionally, the first sealing member is arranged perpendicular to the axis of the transmission portion.

[0018] Optionally, the first seal is arranged at one end of the transmission part close to the drive shaft; and the second seal is arranged at a side of the second seal close to the drive shaft.

[0019] Optionally, the second sealing member is arranged on a side of the first sealing member away from the transmission portion.

[0020] Optionally, a first screw-out portion is provided on the inner side wall of the sealing groove; the first screw-out portion is provided along a first spiral path, and the first spiral path is opposite to the rotation direction of the driving shaft; there is a gap between the first screw-out portion and the sealing portion;

[0021] And / or; a second screw-out portion is arranged on the outer wall of the sealing portion; the second screw-out portion is arranged along a second spiral path, and the second spiral path is opposite to the rotation direction of the drive shaft; there is a gap between the second screw-out portion and the inner wall of the sealing groove.

[0022] Optionally, the feeding device further comprises an oil seal; the oil seal is connected to the radial outer periphery of the driving shaft, and the oil seal is located on a side of the transmission part away from the output part.

[0023] Optionally, the transmission part and the sealing part are integrally formed.

[0024] A drone includes a feeding device. The feeding device includes a housing, a drive shaft, and a conveying assembly;

[0025] A feeding channel is provided in the shell; the driving shaft is rotatably connected to the shell;

[0026] The conveying assembly is arranged inside the feeding channel, and the conveying assembly includes an output part, a transmission part and a sealing part; the transmission part is connected to the driving shaft so that the transmission part rotates following the driving shaft; the sealing part is arranged on the radial outer periphery of the transmission part, and at least part of the sealing part is biased toward the driving shaft; the output part is connected to the transmission part so that the output part rotates following the transmission part;

[0027] A sealing groove is also formed on the inner side wall of the shell; the sealing portion is accommodated in the sealing groove, and a gap is formed between the sealing portion and the sealing groove.

[0028] The drone provided by the present invention adopts the above-mentioned feeding device. The beneficial effects of the drone relative to the prior art are the same as the beneficial effects of the above-mentioned feeding device relative to the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a cross-sectional structural schematic diagram of the spreading system provided in the embodiment of the present application;

[0031] Figure 2 It is a schematic cross-sectional structural diagram of a housing provided in an embodiment of the present application;

[0032] Figure 3 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0033] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0034] Icons: 10-feeding device; 11-spreading device; 100-housing; 101-feeding port; 102-gap; 110-feeding channel; 120-hole; 130-sealing groove; 131-first cavity; 132-second cavity; 200-driving device; 210-driving shaft; 220-bearing; 300-conveying assembly; 310-transmission part; 320-sealing part; 321-first sealing member; 322-second sealing member; 330-output part; 400-oil seal. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] 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 invention claimed for protection, 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.

[0037] 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, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do 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 invention.

[0039] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0040] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0041] The present application provides a drone (not shown), which can spread materials according to the user's setting method to spread the materials to the user's specified location. In the case where the drone is used in the agricultural field, the materials can be seeds, fertilizers or medicines, etc.; in the case where the drone is used in the breeding field, the materials can be feed, etc.; of course, in the case where the drone is used in other fields, the drone can also be used to spread solid particles or condensed materials.

[0042] It should be noted that the drone can move along the set route according to the user's settings, so as to spread the materials at each designated location in the set route, thereby completing the spreading operation set by the user. The movement mode of the drone can be flying, walking on land, walking in water or walking on the water surface, etc. Optionally, the drone can be equipped with a propeller or a jet structure to realize the flight of the drone, walking in water or walking on the water surface; the drone can be equipped with walking wheels or tracks to realize the walking of the drone on land.

[0043] Among them, the UAV includes a main body, a control system and a spreading system. The main body is provided with a power system, a storage system and an energy system. The power system may include one or more of a propeller, a jet structure, a walking wheel or a crawler track; the power system and the control system are electrically connected, and the control system can control the power system to drive the body to move, so that the UAV can move along a set route. The energy system may include a battery or a gas engine; the energy system is connected to the power system to provide mobile energy to the power system. The storage system is used to store materials, and the spreading system can be connected to the storage system to receive the materials exported from the storage system and spread the received materials to a designated location; of course, the spreading system and the control system are electrically connected, and the control system can control the spreading system to transport and spread the materials.

[0044] See also Figure 1, the sowing system includes a feeding device 10 and a sowing device 11. The feeding device 10 is connected to the storage system, and the materials exported from the storage system are received by the feeding device 10. After receiving the materials, the feeding device 10 can transport the materials to the sowing device 11. The sowing device 11 is connected to the feeding device 10, and the sowing device 11 can receive the materials transported by the feeding device 10, and the sowing device 11 is used to sow the received materials to a designated location to complete the sowing operation set by the user. It should be noted that the feeding device 10 and the sowing device 11 are both electrically connected to the control system, and the control system can control the feeding device 10 to transport materials, wherein the control system can control the feeding device 10 to transport materials, the transport rate, the transport amount, and the transport time, etc. of the materials; similarly, the control system can control the sowing device 11 to sow materials to control the sowing rate, the sowing amount, and the sowing time, etc. of the materials.

[0045] In the embodiments of this application, please refer to Figure 1 and Figure 2 The feeding device 10 includes a housing 100, a driving device 200 and a conveying assembly 300. A feed port 101 is provided on the housing 100, and the housing 100 is connected to the storage system through the feed port 101, so that the storage system can introduce materials into the internal space of the housing 100 from the feed port 101. The conveying assembly 300 is rotatably arranged in the internal space of the housing 100. When the material enters the internal space of the housing 100, the material can contact the conveying assembly 300; and when the conveying assembly 300 rotates relative to the housing 100, the conveying assembly 300 can convey the material toward the sowing device 11. The driving device 200 is arranged outside the housing 100, and the driving shaft 210 of the driving device 200 passes through the housing 100 and is transmission-connected with the conveying assembly 300, so that the driving device 200 can provide power to the conveying assembly 300 through the driving shaft 210.

[0046] Please refer to Figure 3 and Figure 4 In order to facilitate the transmission connection between the drive shaft 210 and the conveying assembly 300, the housing 100 is provided with a hole 120 for the drive shaft 210 to pass through. Of course, in order to ensure that the drive shaft 210 is stably assembled in the hole 120, at least one bearing 220 is provided inside the hole 120, and the drive shaft 210 cooperates with the bearing 220, so that the drive shaft 210 and the housing 100 can be rotated together. In the prior art, during the material conveying process, materials often move into the bearing 220 or into the gap around the bearing 220, thereby affecting the rotation of the bearing 220, which will affect the operation of the drive shaft 210, and thus affect the operation of the conveying assembly 300, affecting the conveying efficiency; it may even damage the bearing 220, reducing the user experience.

[0047] In order to improve the above technical problems, in other words, to improve the technical problem in the prior art that materials enter the bearing 220 or the gap around the bearing 220 and easily cause damage to the bearing 220, a feeding device 10 in an embodiment of the present application and a drone using the feeding device 10 are provided.

[0048] In some embodiments of this application, please refer to Figure 1 and Figure 3 , a feeding channel 110 is provided in the housing 100, and the conveying assembly 300 is rotatably provided in the feeding channel 110; the feed port 101 is communicated with the feeding channel 110, and after the material enters the feeding channel 110, the material contacts the conveying assembly 300, and the conveying assembly 300 can convey the material along the feeding channel 110 during the rotation relative to the housing 100. In addition, the conveying assembly 300 includes an output part 330, a transmission part 310 and a sealing part 320; the transmission part 310 is connected to the drive shaft 210 so that the transmission part 310 rotates with the drive shaft 210; the output part 330 is connected to the transmission part 310 so that the output part 330 rotates with the transmission part 310; the transmission part 310 can transmit the power transmitted by the drive shaft 210 to the output part 330, and the output part 330 can convey the material during the rotation process. The sealing part 320 is arranged on the radial outer periphery of the transmission part 310, and at least part of the sealing part 320 is arranged biased toward the drive shaft 210. Correspondingly, a sealing groove 130 is also provided on the inner side wall of the housing 100, that is, a sealing groove 130 is provided on the inner peripheral wall surrounding the feeding channel 110, the sealing groove 130 is communicated with the hole 120 through which the driving shaft 210 passes, and the sealing groove 130 is configured to accommodate the sealing portion 320, so that the sealing portion 320 can block the hole 120 through which the driving shaft 210 passes, thereby preventing the material from falling into the bearing 220 or entering the gap around the bearing 220. In other words, the sealing portion 320 is accommodated in the sealing groove 130, and a gap 102 is formed between the sealing portion 320 and the sealing groove 130.

[0049] It should be noted that, since the transmission part 310 and the sealing part 320 both rotate relative to the shell 100 during the rotation of the driving shaft 210, it is necessary to form a gap 102 between the sealing part 320 and the surrounding wall forming the sealing groove 130, thereby preventing the sealing part 320 from being damaged due to friction between the sealing part 320 and the surrounding wall forming the sealing groove 130, while ensuring that the driving shaft 210 can stably transmit power to the output part 330.

[0050] Among them, since at least part of the sealing part 320 is disposed toward the driving shaft 210, the gap 102 formed between at least part of the sealing part 320 and the peripheral wall surrounding the sealing groove 130 is circuitous, thereby increasing the difficulty of the material passing through the gap 102 and entering the bearing 220 or entering the gap around the bearing 220, thereby preventing the material from entering the inside of the bearing 220 or entering the gap around the bearing 220, thereby achieving the purpose of protecting the bearing 220. Not only can the safety of the bearing 220 be ensured and damage to the bearing 220 be avoided, but also the driving shaft 210 can be ensured to rotate stably, thereby driving the output part 330 to stably transport the material.

[0051] It is worth noting that, “at least part” means that part of the sealing part 320 may be arranged biased toward the drive shaft 210; or all of the sealing parts 320 may be arranged biased toward the drive shaft 210. In the case where all of the sealing parts 320 are arranged biased toward the drive shaft 210, a gap extending biased toward the drive shaft 210 may be formed between the side of the sealing part 320 away from the transmission part 310 and the peripheral wall surrounding the sealing groove 130, and a gap extending away from the drive shaft 210 may be formed between the side of the sealing part 320 close to the transmission part 310 and the peripheral wall surrounding the sealing groove 130, thereby forming a circuitous gap 102, thereby increasing the difficulty of materials passing through the gap 102, and preventing materials from entering the inside of the bearing 220 or entering the gap around the bearing 220. Of course, when the partial sealing portion 320 is arranged biased toward the drive shaft 210, a gap extending toward the drive shaft 210 is formed on the side of the partial sealing portion 320 away from the transmission portion 310, and a gap extending away from the drive shaft 210 is formed on the side of the partial sealing portion 320 close to the transmission portion 310, thereby forming a tortuous gap 102, which can increase the difficulty of materials passing through the gap 102 and prevent materials from entering the interior of the bearing 220 or entering the gap around the bearing 220.

[0052] It should be noted that, when all the sealing parts 320 are disposed toward the drive shaft 210, an acute angle is formed between the sealing part 320 and the axis of the transmission part 310, so that the sealing part 320 can pass through the circuitous gap 102. In addition, when part of the sealing part 320 is disposed toward the drive shaft 210, the angle between the axis of the sealing part 320 and the transmission part 310 can be zero angle or acute angle.

[0053] Optionally, the transmission part 310 and the sealing part 320 are integrally formed. The transmission part 310 and the sealing part 320 can be directly formed by injection molding or casting. Of course, the transmission part 310 and the sealing part 320 can also be formed by cutting. It should be understood that in other embodiments of the present application, other formation methods can also be used between the transmission part 310 and the sealing part 320. For example, the sealing part 320 is connected to the transmission part 310 by welding; for another example, the sealing part 320 is connected to the transmission part 310 by plugging or snapping; for another example, the sealing part 320 is connected to the transmission part 310 by key connection, etc.

[0054] Optionally, see Figure 3 and Figure 4 In some embodiments of the present application, the sealing part 320 includes a first sealing member 321 and a second sealing member 322; the first sealing member 321 is disposed on the outer side of the transmission part 310, and the first sealing member 321 forms an angle with the axis of the transmission part 310; the second sealing member 322 is disposed on the first sealing member 321, and the second sealing member 322 forms an angle with the first sealing member 321. Correspondingly, a first cavity 131 and a second cavity 132 are formed inside the sealing groove 130; the first cavity 131 accommodates the first sealing member 321; the second cavity 132 accommodates the second sealing member 322. In this case, a gap 102 is formed between the first seal 321 and the peripheral wall surrounding the first cavity 131, and a gap 102 is formed between the second seal 322 and the peripheral wall surrounding the second cavity 132. In addition, since the first seal 321 and the second seal 322 form an angle, an angle is formed between parts of the gaps 102, so that the gap 102 between the sealing portion 320 and the sealing groove 130 is maze-shaped, thereby increasing the difficulty of materials passing through the gap 102, thereby preventing materials from entering the interior of the bearing 220 or entering the gap around the bearing 220, thereby providing effective protection for the bearing 220, thereby improving the technical problem in the prior art that materials entering the bearing 220 or the gap around the bearing 220 can easily cause damage to the bearing 220.

[0055] It should be noted that the second seal 322 can be regarded as being arranged on one side of the drive shaft 210, so that the sealing structure formed by the first seal 321 and the second seal 322 can cover the sealing groove 130 to provide effective protection for the bearing 220. In order to provide a tight sealing effect, the first seal 321 and the second seal 322 both form a ring around the transmission part 310.

[0056] Optionally, in some embodiments of the present application, the second seal 322 is in a straight cylindrical shape, and the axis of the second seal 322 is colinear with the axis of the transmission part 310. In other words, the arrangement of the second seal 322 can be regarded as: a zero angle is formed between the straight line where the extension direction of the second seal 322 is located and the axis of the transmission part 310. Correspondingly, the internal space of the second cavity 132 is formed in a straight cylindrical shape to facilitate the accommodation of the second seal 322. When the second seal 322 is accommodated in the second cavity 132, a gap 102 is formed between the second seal 322 and the peripheral wall of the second cavity 132, so that a circuitous gap 102 can be formed between the side of the second seal 322 close to the transmission part 310 and the peripheral wall surrounding the second cavity 132, thereby preventing materials from entering the interior of the bearing 220 or entering the gap around the bearing 220.

[0057] In addition, it is worth mentioning that when the second seal 322 is set to a straight cylindrical type, the second seal 322 can be easily assembled into the second cavity 132, and it is also convenient to remove the second seal 322 from the second cavity 132, thereby facilitating the disassembly and assembly of the second seal 322 and the second cavity 132; in other words, it can facilitate the disassembly and assembly between the sealing part 320 and the sealing groove 130.

[0058] It should be understood that in other embodiments of the present application, the second seal 322 may be arranged differently. For example, the second seal 322 may also be formed in a conical shape. In other words, the second seal 322 roughly forms an acute angle with the axis of the transmission part 310. At this time, the space enclosed by the second seal 322 gradually increases or decreases from the side close to the first seal 321 to the side away from the first seal 321. In this case, the side of the second seal 322 close to the transmission part 310 may also form a circuitous gap 102 with the peripheral wall of the second cavity 132.

[0059] It should be noted that when an acute angle is formed between the second seal 322 and the axis of the transmission part 310, in order to facilitate the disassembly and assembly between the second seal 322 and the second cavity 132, the second seal 322 can be made of a soft and elastic material. The second seal 322 made of elastic material can not only facilitate the disassembly and assembly between the second seal 322 and the second cavity 132.

[0060] In addition, in some embodiments of the present application, the first seal 321 is arranged perpendicular to the axis of the transmission part 310. In other words, the first seal 321 is generally a plate-shaped structure, and the first seal 321 is annular. On the one hand, the hole 120 through which the drive shaft 210 passes can be covered by the first seal 321, and on the other hand, the manufacturing of the first seal 321 can be facilitated.

[0061] It is worth noting that the first seal 321 is set perpendicular to the axis of the transmission part 310. When the first seal 321 is accommodated in the first cavity 131, the first seal 321 can be roughly flush with the inner circumferential wall of the housing 100, thereby preventing the formation of additional gaps 102 to affect the transportation of materials. Of course, in other embodiments of the present application, the first seal 321 can also be in other ways. For example, the first seal 321 is tilted toward the drive shaft 210 or tilted away from the drive shaft 210, thereby making the first seal 321 roughly conical.

[0062] In addition, in an embodiment of the present application, the first seal 321 is arranged at one end of the transmission part 310 close to the drive shaft 210, thereby facilitating the sealing part 320 to be accommodated as a whole in the sealing groove 130; the second seal 322 is arranged on a side of the second seal 322 close to the drive shaft 210, that is, the second seal 322 is arranged biased toward the drive shaft 210.

[0063] Optionally, in some embodiments of the present application, the second seal 322 is disposed on a side of the first seal 321 away from the transmission part 310. Based on this, the formation of the first seal 321 and the second seal 322 can be regarded as that the second seal 322 is a flange formed completely on a side of the first seal 321 away from the transmission part 310. In this case, the production of the first seal 321 and the second seal 322 can be facilitated.

[0064] It should be understood that in other embodiments of the present application, the first seal 321 and the second seal 322 may be arranged differently. For example, the second seal 322 is arranged in the middle of the first seal 321, so that the cross-sections of the first seal 321 and the second seal 322 are two T-shaped. For another example, the second seal 322 is arranged on one side of the first seal 321 close to the transmission part 310, etc.

[0065] In addition, in some embodiments of the present application, the first seal 321 and the second seal 322 are formed into a one-piece seal portion 320, thereby improving the connection stability between the first seal 321 and the second seal 322, and also eliminating the gap 102 generated when the first seal 321 and the second seal 322 are separated, thereby improving the sealing performance. Of course, in other embodiments of the present application, the first seal 321 and the second seal 322 may be arranged differently, for example, the second seal 322 is arranged on the first seal 321 by welding; for another example, the second seal 322 is detachably connected to the first seal 321 by plugging or screw connection, etc.

[0066] It should be noted that the tortuous gap 102 formed by the sealing part 320 can prevent large particles from entering the gap 102, while some smaller particles can also enter the gap 102 on the side of the second sealing member 322 away from the transmission part 310. In order to improve the smaller particles staying in the gap 102 on the side of the second sealing member 322 away from the transmission part 310, in some embodiments of the present application, a first screw-out portion (not shown) is provided on the inner side wall of the sealing groove 130; the first screw-out portion is provided along a first spiral path, and the first spiral path is opposite to the rotation direction of the drive shaft 210; there is a gap 102 between the first screw-out portion and the sealing part 320. And / or; a second screw-out portion (not shown) is provided on the outer side wall of the sealing part 320; the second screw-out portion is provided along a second spiral path, and the second spiral path is opposite to the rotation direction of the drive shaft 210; there is a gap 102 between the second screw-out portion and the inner side wall of the sealing groove 130.

[0067] It should be noted that the inner sidewall of the sealing groove 130 refers to the inner sidewall of the sidewalls forming the second cavity 132 away from the transmission part 310 . The outer sidewall of the sealing part 320 refers to the sidewall of the second sealing member 322 away from the transmission part 310 .

[0068] When the driving shaft 210 drives the transmission part 310 to rotate, the transmission part 310 drives the sealing part 320 to rotate, thereby causing the sealing part 320 and the peripheral wall surrounding the sealing groove 130 to rotate relative to each other; based on this, when the first screw-out part and / or the second screw-out part are provided, the first screw-out part and the second screw-out part can provide an outward conveying force to the material in the gap 102, thereby allowing the small particles entering the gap 102 to be discharged, and preventing the small particles from staying in the gap 102. Of course, the spiral direction of the first screw-out part and the spiral direction of the second screw-out part should be opposite to the rotation direction of the driving shaft 210, so as to achieve the purpose of screwing out the material.

[0069] Here, “and / or” means that the first screw-out portion can be provided only on the inner wall of the sealing groove 130 , or the second screw-out portion can be provided only on the sealing portion 320 ; or the first screw-out portion can be provided on the inner wall of the sealing groove 130 , and the second screw-out portion can be provided on the outer side of the sealing portion 320 .

[0070] It should be noted that, when the first screw-out portion and the second screw-out portion are provided at the same time, in order to prevent the first screw-out portion and the second screw-out portion from colliding and rubbing against each other, there is a gap 102 between the first screw-out portion and the second screw-out portion. In other words, there is a certain gap 102 between the highest point of the first screw-out portion and the highest point of the second screw-out portion, thereby preventing the first screw-out portion and the second screw-out portion from affecting each other. Of course, when only the first screw-out portion is provided, there is a gap 102 between the first screw-out portion and the sealing portion 320; when only the second screw-out portion is provided, there is a gap 102 between the second screw-out portion and the peripheral wall surrounding the sealing groove 130.

[0071] In addition, the first screw-out portion can also be regarded as a thread disposed on the peripheral wall surrounding the sealing groove 130, and similarly, the second screw-out portion can also be regarded as a thread disposed outside the sealing portion 320. Of course, in other embodiments of the present application, the first screw-out portion and the second screw-out portion can also be disposed in other ways, for example, protrusions arranged along a spiral path, etc.

[0072] In other embodiments of the present application, the first screw-out portion and the second screw-out portion may also be eliminated.

[0073] In addition, in the embodiment of the present application, in order to further improve the safety of the bearing 220, the feeding device 10 further includes an oil seal 400; the oil seal 400 is connected to the radial outer periphery of the driving shaft 210, and the oil seal 400 is located on the side of the transmission part 310 away from the output part 330. The provision of the oil seal 400 can further improve the protection of the bearing 220. Even if part of the material passes through the gap 102, the material can be isolated from the bearing 220 by the oil seal 400, thereby achieving the purpose of protecting the bearing 220.

[0074] Optionally, in some embodiments of the present application, there may be multiple oil seals 400, so that oil seals 400 are provided on both sides of the axial direction of the bearing 220 to improve the protection of the bearing 220. Of course, it should be understood that in other embodiments of the present application, the oil seals 400 may also be eliminated.

[0075] In summary, in the feeding device 10 and the drone provided in the embodiment of the present application, the driving shaft 210 can rotate relative to the housing 100, and at the same time drive the transmission part 310 to rotate, and the transmission part 310 can drive the sealing part 320 and the output part 330 to rotate while rotating, and the material can be transported during the rotation of the output part 330. In addition, since at least part of the sealing part 320 is arranged to one side of the driving shaft 210, when the sealing part 320 cooperates with the sealing groove 130, the sealing part 320 can at least partially form a circuitous gap 102 with the surrounding wall of the sealing groove 130, thereby increasing the difficulty of the material passing through the gap 102, and preventing the material from passing through the gap 102 into the inside of the bearing 220 or into the gap around the bearing 220, thereby avoiding the material from causing damage to the bearing 220. Therefore, it can be achieved to improve the technical problem in the prior art that the material enters the bearing 220 or the gap around the bearing 220, which easily causes the bearing 220 to be damaged. Furthermore, a gap 102 is formed between the first seal 321 and the peripheral wall surrounding the first cavity 131, and a gap 102 is formed between the second seal 322 and the peripheral wall surrounding the second cavity 132. In addition, since the first seal 321 and the second seal 322 form an angle, an angle is formed between parts of the gaps 102, so that the gap 102 between the sealing portion 320 and the sealing groove 130 is labyrinth-shaped, thereby increasing the difficulty of materials passing through the gap 102, thereby preventing materials from entering the interior of the bearing 220 or entering the gap around the bearing 220, thereby providing effective protection for the bearing 220, thereby improving the technical problem in the prior art that materials entering the bearing 220 or the gap around the bearing 220 easily cause damage to the bearing 220.

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

Claims

1. A feeding device, applied to a spreading system of an unmanned aerial vehicle, characterized in that: The feeding device comprises a housing, a driving shaft and a conveying assembly; A feeding channel is provided in the shell; the driving shaft is rotatably connected to the shell; The conveying assembly is arranged inside the feeding channel, and the conveying assembly includes an output part, a transmission part and a sealing part; the transmission part is connected to the driving shaft so that the transmission part rotates following the driving shaft; the sealing part is arranged on the radial outer periphery of the transmission part, and at least part of the sealing part is biased toward the driving shaft; the output part is connected to the transmission part so that the output part rotates following the transmission part; A sealing groove is also formed on the inner side wall of the housing; the sealing portion is accommodated in the sealing groove, and a gap is formed between the sealing portion and the sealing groove; The sealing part includes a first sealing member and a second sealing member; the first sealing member is arranged on the outer side of the transmission part, and the first sealing member forms an angle with the axis of the transmission part; the second sealing member is arranged on the first sealing member, and the second sealing member forms an angle with the first sealing member; the first sealing member is arranged perpendicular to the axis of the transmission part; A first cavity and a second cavity are formed inside the sealing groove; the first cavity accommodates the first sealing member; the second cavity accommodates the second sealing member; a first screw-out portion is provided on the inner side wall of the sealing groove; the first screw-out portion is provided along a first spiral path, and the first spiral path is opposite to the rotation direction of the drive shaft; there is a gap between the first screw-out portion and the sealing portion; And / or; a second screw-out portion is provided on the outer side wall of the sealing portion; the second screw-out portion is provided along a second spiral path, the second spiral path is opposite to the rotation direction of the drive shaft; there is a gap between the second screw-out portion and the inner side wall of the sealing groove; The transmission part and the sealing part are integrally formed.

2. The feeding device according to claim 1, characterized in that: The second sealing member is in a straight cylindrical shape, and an axis of the second sealing member is colinear with an axis of the transmission part.

3. The feeding device according to claim 1, characterized in that: The first seal is arranged at one end of the transmission part close to the driving shaft; the second seal is arranged at one side of the first seal close to the driving shaft.

4. The feeding device according to claim 3, characterized in that: The second sealing member is arranged on a side of the first sealing member away from the transmission portion.

5. The feeding device according to any one of claims 1 to 4, characterized in that: The feeding device further comprises an oil seal; the oil seal is connected to the radial outer periphery of the driving shaft, and the oil seal is located on a side of the transmission part away from the output part.

6. A drone, characterized in that: It comprises a feeding device as described in any one of claims 1-5.

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