Conveying auger, spreading device and unmanned aerial vehicle

Abstract

The application discloses a material conveying auger, a sowing device and a unmanned aerial vehicle. The material conveying auger is used for conveying material in the sowing device, and comprises an auger body, a first spiral structure and a second spiral structure. The first spiral structure and the second spiral structure are sequentially arranged on the outer periphery of the auger body along the axial direction of the auger body. In the state that the auger body rotates, the first spiral structure and the second spiral structure can convey the material along the axial direction. The number of spiral lines of at least a partial region of the second spiral structure is less than the number of spiral lines of the first spiral structure. According to the above-mentioned material conveying auger, the eccentricity problem of the material conveying auger when the material falls can be relieved.

Description

Technical Field

[0001] This invention relates to the field of material conveying, and particularly to a material conveying auger, a spreading device, and a drone. Background Technology

[0002] Due to their advantages such as maneuverability, rapid response, and high operating speed, drones are increasingly being widely used in agricultural fields. Drones can be equipped with spreading devices, which include a conveyor auger for transporting materials to the target material distribution area.

[0003] Currently, the material conveying auger has a serious problem of material eccentricity when discharging material into the target discharge area. Summary of the Invention

[0004] This invention provides a material conveying auger, a spreading device, and a drone, which can alleviate the problem of material eccentricity during material discharge from the material conveying auger.

[0005] In a first aspect, embodiments of the present invention provide a material conveying auger for conveying materials in a spreading device. The material conveying auger includes: an auger body; a first spiral structure and a second spiral structure, which are sequentially arranged on the outer periphery of the auger body along the axial direction. When the auger body is in a rotating state, the first spiral structure and the second spiral structure can convey materials along the axial direction, wherein the number of spirals in at least a portion of the second spiral structure is less than the number of spirals in the first spiral structure.

[0006] According to the foregoing embodiment of the first aspect of the present invention, the second spiral structure includes a transition section and a conveying section. Along the conveying direction of the conveying auger, the first spiral structure, the transition section, and the conveying section are arranged and connected in sequence, and the number of spirals of the second spiral structure in the transition section is set to decrease along the conveying direction.

[0007] According to any of the foregoing embodiments of the first aspect of the present invention, the number of spirals in the transition section of the second spiral structure is set to gradually decrease along the conveying direction.

[0008] According to any of the foregoing embodiments of the first aspect of the present invention, the first spiral structure includes at least two first blades spirally arranged on the outer periphery of the auger body, and the second spiral structure includes at least one second blade spirally arranged on the conveying section and a transition blade spirally arranged on the transition section, wherein at least one first blade is continuously connected to a corresponding second blade through the transition blade, and at least one first blade is cut off at the transition section after being connected to the transition blade.

[0009] According to any of the foregoing embodiments of the first aspect of the present invention, at least one of the first blades is provided with a notch at the connection point between it and the corresponding transition blade.

[0010] According to any of the foregoing embodiments of the first aspect of the present invention, the second spiral structure is a single spiral structure in the conveying section.

[0011] According to any of the foregoing embodiments of the first aspect of the present invention, along the conveying direction of the conveying auger, the inner diameter of at least a portion of the second spiral structure gradually decreases.

[0012] According to any of the foregoing embodiments of the first aspect of the present invention, the pitch of the second helical structure is greater than the pitch of the first helical structure in at least a portion of the region.

[0013] According to any of the foregoing embodiments of the first aspect of the present invention, along the conveying direction of the conveying auger, the pitch of at least a portion of the second spiral structure gradually increases.

[0014] According to any of the foregoing embodiments of the first aspect of the present invention, the outer diameter of at least a portion of the second helical structure is greater than the outer diameter of the first helical structure.

[0015] In a second aspect, embodiments of the present invention provide a spreading device, comprising: a housing having a material conveying channel, a spreading chamber, and an inlet, the spreading chamber being connected to one end of the material conveying channel, and the inlet being located on one circumferential side of the material conveying channel; a material conveying auger according to any of the foregoing embodiments of the first aspect of the present invention, the material conveying auger being installed in the material conveying channel, the inlet being able to expose a portion of the first spiral structure of the material conveying auger, the material conveying auger being used to convey material from the inlet to the spreading chamber; and a spreading assembly, at least partially located in the spreading chamber, the spreading assembly being used to spread the material in the spreading chamber outward.

[0016] Thirdly, embodiments of the present invention provide a drone, comprising: a fuselage; and a dispersing device according to any of the foregoing embodiments of the second aspect of the present invention, the dispersing device being mounted on the fuselage.

[0017] According to an embodiment of the present invention, in the auger conveying system, a first spiral structure and a second spiral structure are sequentially arranged on the outer periphery of the auger body along the axial direction of the auger body. The number of spirals in at least a portion of the second spiral structure is less than the number of spirals in the first spiral structure. The smaller number of spirals in at least a portion of the second spiral structure results in a larger material-accommodating space per unit axial length compared to the first spiral structure. The material is more loosely distributed at the second spiral structure, and the friction between the material and the second spiral structure is smaller, thereby further reducing the tangential velocity of the material at the second spiral structure. After being conveyed by the second spiral structure, the material falls into the target falling area, significantly alleviating the problem of material eccentricity during auger discharge. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a perspective view of the first embodiment of the material conveying auger of the present invention;

[0020] Figure 2 This is a cross-sectional schematic diagram of the first embodiment of the material conveying auger of the present invention;

[0021] Figure 3 This is a perspective view of the second embodiment of the material conveying auger of the present invention;

[0022] Figure 4 This is a cross-sectional schematic diagram of the second embodiment of the material conveying auger of the present invention;

[0023] Figure 5 This is a perspective view of the third embodiment of the material conveying auger of the present invention;

[0024] Figure 6 This is a cross-sectional schematic diagram of the third embodiment of the material conveying auger of the present invention;

[0025] Figure 7 This is a perspective view of an embodiment of the spreading device of the present invention;

[0026] Figure 8 This is a top view schematic diagram of an embodiment of the spreading device of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100-Material conveying auger;

[0029] 110 - Screwdriver body;

[0030] 120 - First helical structure; 121 - First blade;

[0031] 130 - Second spiral structure; 130a - Transition section; 130b - Conveying section; 131 - Transition blade; 1311 - Cut-off end; 132 - Second blade;

[0032] 140-gap;

[0033] 200 - Shell; 210 - Material conveying channel; 220 - Spreading chamber; 230 - Inlet; 240 - Spreading port;

[0034] 300 - Spreading component; 310 - Spreading tray; 320 - Second rotation drive component;

[0035] 400 - First rotation drive component;

[0036] X - Conveying direction.

[0037] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0040] Furthermore, the use of terms such as "first" and "second" in this invention 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 with "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 by this invention.

[0041] This invention provides a material conveying auger and a spreading device, wherein the material conveying auger is used to convey materials in the spreading device.

[0042] Figure 1 , Figure 2 This is a perspective view and a cross-sectional view of a first embodiment of the material conveying auger of the present invention. The material conveying auger 100 includes an auger body 110, a first spiral structure 120, and a second spiral structure 130. The first spiral structure 120 and the second spiral structure 130 are sequentially arranged on the outer periphery of the auger body 110 along the axial direction. When the auger body 110 is in a rotating state, the first spiral structure 120 and the second spiral structure 130 can convey materials along the axial direction. In this embodiment, the number of spirals in at least a portion of the second spiral structure 130 is less than the number of spirals in the first spiral structure 120.

[0043] According to an embodiment of the present invention, in the auger 100, a first spiral structure 120 and a second spiral structure 130 are sequentially arranged on the outer periphery of the auger body 110 along the axial direction of the auger body 110. The number of spirals in at least a portion of the second spiral structure 130 is less than the number of spirals in the first spiral structure 120. The smaller number of spirals in at least a portion of the second spiral structure 130 results in a larger material holding space per unit axial length compared to the first spiral structure 120. The material is more loosely distributed at the second spiral structure 130, and the friction between the material and the second spiral structure 130 is smaller, thereby further reducing the tangential velocity of the material at the second spiral structure 130. After being conveyed by the second spiral structure 130, the material falls into the target dropping area, which can significantly alleviate the problem of material eccentricity during material dropping in the auger 100.

[0044] In some embodiments, the first helical structure 120 is a multi-helix structure. In this embodiment, the first helical structure 120 is a double-helix structure. In other embodiments, the first helical structure 120 can be a triple-helix structure, a quadruple-helix structure, or other multi-helix structures with other numbers of helices. The conveying auger 100 of this embodiment is used to convey materials in a spreading device. In scenarios where the spreading output and usage per acre are relatively small, the multi-helix structure of the first helical structure 120 allows for a higher axial velocity of the material when the conveying auger 100 is conveying materials, reducing the rotational speed required to drive the conveying auger 100, thereby correcting to some extent the problems of reduced spreading output efficiency and inaccurate spreading output caused by lower rotational speed.

[0045] When the conveying auger 100 is used in a spreading device, the housing of the spreading device has a conveying channel, a spreading chamber, and an inlet. The spreading chamber is connected to one end of the conveying channel, and the inlet is located on one side of the conveying channel. The conveying auger 100 is installed in the conveying channel, and the inlet exposes a portion of the first spiral structure 120 of the conveying auger 100. The material passes through the inlet, sequentially through the first spiral structure 120 and the second spiral structure 130, and falls into the spreading chamber.

[0046] In some embodiments, the second spiral structure 130 includes a transition section 130a and a conveying section 130b. Along the conveying direction X of the conveying auger 100, the first spiral structure 120, the transition section 130a, and the conveying section 130b are arranged and connected in sequence.

[0047] In this article, the conveying direction X of the conveying auger 100 refers to the direction in which the conveying auger 100 pushes the material axially when the auger body 110 is in a state of rotational motion. When the auger body 110 is in a state of rotational motion, the material can pass through the second spiral structure 130 in sequence. Specifically, the material can pass through the first spiral structure 120, the transition section 130a, and the conveying section 130b in sequence.

[0048] In some embodiments, the number of spirals in the transition section 130a of the second spiral structure 130 is set to decrease along the conveying direction X. Therefore, the number of spirals in the conveying section 130b of the second spiral structure 130 is less than the number of spirals in the first spiral structure 120. The material holding space per unit axial length at the conveying section 130b is relatively larger than that of the first spiral structure 120, and the tangential velocity of the material at the conveying section 130b can be reduced. The conveying section 130b is located downstream of the conveying auger 100 in the conveying direction X. After passing through the conveying section 130b, the material is discharged, thereby alleviating the problem of material eccentricity during material discharge from the conveying auger 100.

[0049] In some embodiments, the difference between the number of spirals in the first spiral structure 120 and the number of spirals in the second spiral structure 130 in the conveying section 130b is greater than or equal to 2. In some embodiments, the number of spirals in the second spiral structure 130 in the transition section 130a is set to gradually decrease along the conveying direction X. For example, the first spiral structure 120 is a three-spiral structure, and the second spiral structure 130 in the conveying section 130b is a single-spiral structure. The second spiral structure 130 first changes from a three-spiral structure to a double-spiral structure along the conveying direction X, and then changes from a double-spiral structure to a single-spiral structure, thus achieving the goal of setting the number of spirals in the second spiral structure 130 in the transition section 130a to gradually decrease along the conveying direction X. By setting the number of spirals in the second spiral structure 130 in the transition section 130a to gradually decrease along the conveying direction X, the stability of the material conveying process in the transition section 130a is ensured, thereby ensuring the stability of the material discharge amount when the conveying auger 100 discharges material.

[0050] In this embodiment, the second spiral structure 130 is a single spiral structure in the conveying section 130b, thereby significantly increasing the material holding space of the second spiral structure 130 per unit axial length while ensuring that the material can be conveyed normally, thus making it easier to reduce the tangential velocity of the material at the second spiral structure 130.

[0051] In this embodiment, the first helical structure 120 is a double helical structure and the second helical structure 130 is a single helical structure in the conveying section 130b as an example. In other embodiments, the number of helices in the first helical structure 120 and the number of helices in the second helical structure 130 in the conveying section 130b can be other numbers, as long as the number of helices in the second helical structure 130 in the conveying section 130b is less than the number of helices in the first helical structure 120.

[0052] The first spiral structure 120 and the second spiral structure 130 each include blades spirally arranged around the outer periphery of the auger body 110, and spiral grooves that can accommodate materials are formed between the spirally arranged blades.

[0053] In some embodiments, the first helical structure 120 includes at least two first blades 121 helically arranged around the outer periphery of the auger body 110, and the second helical structure 130 includes at least one second blade 132 helically arranged in the conveying section 130b and a transition blade 131 helically arranged in the transition section 130a. In some embodiments, at least one first blade 121 is continuously connected to a corresponding second blade 132 via the transition blade 131, and the connection between the at least one first blade 121 and the transition blade 131 is terminated at the transition section 130a.

[0054] For example, the first spiral structure 120 includes two first blades 121 spirally arranged around the outer periphery of the auger body 110, and the second spiral structure 130 includes a second blade 132 spirally arranged in the conveying section 130b and a transition blade 131 spirally arranged in the transition section 130a. One of the first blades 121 is continuously connected to the second blade 132 through the transition blade 131, and the other first blade 121 is connected to the transition blade 131 and then cut off in the transition section 130a.

[0055] like Figure 1 At least one first blade 121 is connected to the transition blade 131 and then cut off at the transition section 130a, so that the transition blade 131 has a cut-off end 1311.

[0056] In the above embodiment, at least one first blade 121 is continuously connected to a corresponding second blade 132 via a transition blade 131, ensuring that at least one blade extends from the inlet of the spreading device to the target material drop point along the axial direction of the conveying auger 100, thus ensuring the effectiveness of material transmission. After the connection between at least one first blade 121 and the transition blade 131, the connection is terminated at the transition section 130a, thereby reducing the number of spirals in the second spiral structure 130 along the conveying direction X in the transition section 130a.

[0057] In some embodiments, at least one first blade 121 is provided with a notch 140 at the connection point with the corresponding transition blade 131. When the conveying auger 100 is used in a spreading device, the position of the notch 140 corresponds to the edge of the inlet on the housing of the conveying auger 100. By providing the notch 140 at the connection point between the first blade 121 and the corresponding transition blade 131, the problems of material blockage and jamming during the conveying process can be alleviated, and the reliability of the conveying auger 100 and the spreading device can be improved.

[0058] like Figure 2 In some embodiments, the outer diameter of at least a portion of the second helical structure 130 is larger than the outer diameter of the first helical structure 120.

[0059] The outer diameter of the first spiral structure 120 is the diameter of the end edge of the first spiral structure 120 furthest from the auger body 110, which is also the diameter of the outer ring structure of the first spiral structure 120. The outer diameter of the second spiral structure 130 is the diameter of the end edge of the second spiral structure 130 furthest from the auger body 110, which is also the diameter of the outer ring structure of the second spiral structure 130. When the conveying auger 100 is used in a spreading device, the position of the first spiral structure 120 corresponds to the inlet of the spreading device's housing, and the second spiral structure 130 is located within the conveying channel of the spreading device's housing, with a clearance fit to the inner wall of the housing. By setting the outer diameter of at least a portion of the second spiral structure 130 to be larger than the outer diameter of the first spiral structure 120, the second spiral structure 130 can fit more tightly with the inner wall of the housing, thereby improving the stability of the conveying auger 100 in transporting materials.

[0060] In some embodiments, along the conveying direction X of the conveying auger 100, the inner diameter of at least a portion of the second spiral structure 130 gradually decreases.

[0061] In some embodiments, the inner diameter of the entire second spiral structure 130 gradually decreases along the conveying direction X of the conveying auger 100. In some embodiments, the inner diameter of a portion of the second spiral structure 130 gradually decreases along the conveying direction X of the conveying auger 100.

[0062] The inner diameter of the second spiral structure 130 is the diameter at the connection between the second spiral structure 130 and the outer circumferential surface of the auger body 110, which is also the diameter of the inner ring structure of the second spiral structure 130.

[0063] In some embodiments, the inner diameter of the first spiral structure 120 is constant along the conveying direction X of the auger 100. The inner diameter of the first spiral structure 120 is the diameter at the connection between the first spiral structure 120 and the outer peripheral surface of the auger body 110, which is also the diameter of the inner ring structure of the first spiral structure 120.

[0064] When the inner diameter of the first spiral structure 120 is constant and the inner diameter of the second spiral structure 130 gradually changes, the outer circumferential surface of the auger body 110 at the first spiral structure 120 is cylindrical, and the outer circumferential surface of the auger body 110 at the second spiral structure 130 is conical.

[0065] In the above embodiment, as the inner diameter of a portion of the second spiral structure 130 gradually decreases along the conveying direction X of the conveying auger 100, the material holding space of the second spiral structure 130 per unit axial length gradually increases, thus alleviating the material conveying pressure at the second spiral structure 130 and improving the material conveying efficiency to a certain extent. Furthermore, the frictional loss between the material and the second spiral structure 130 decreases, further slowing down the tangential velocity of the material as it rotates with the second spiral structure 130, and further mitigating the problem of material eccentricity.

[0066] In the first embodiment described above, the pitch of the second spiral structure 130 is the same as that of the first spiral structure 120, and the inner diameter of the second spiral structure 130 gradually decreases in at least a portion of the conveying direction X of the auger 100. In other embodiments, the second spiral structure 130 can be improved in other ways to further alleviate the material discharge eccentricity problem.

[0067] Figure 3 , Figure 4 This is a perspective view and a cross-sectional view of the second embodiment of the material conveying auger of the present invention. Some parts of the structure of the second embodiment are the same as those of the first embodiment. The differences between the second embodiment and the first embodiment will be described below, while the similarities will not be described in detail.

[0068] In the second embodiment, the pitch of at least a portion of the second helical structure 130 is greater than the pitch of the first helical structure 120. Further, in this embodiment, the pitch of at least a portion of the second helical structure 130 gradually increases along the conveying direction X of the conveying auger 100.

[0069] In some embodiments, the pitch of the entire second spiral structure 130 gradually increases along the conveying direction X of the auger 100. In some embodiments, the pitch of a portion of the second spiral structure 130 gradually increases along the conveying direction X of the auger 100.

[0070] In the second embodiment described above, along the conveying direction X of the conveying auger 100, the inner diameter of the second spiral structure 130 is constant, and the pitch of the second spiral structure 130 gradually increases in at least a part of the area, so that the material holding space of the second spiral structure 130 per unit axial length gradually increases, the material conveying pressure is relieved at the second spiral structure 130, and the problem of material drop eccentricity can be further alleviated.

[0071] Figure 5 , Figure 6This is a perspective view and a cross-sectional view of the third embodiment of the material conveying auger of the present invention. Some parts of the structure of the third embodiment are the same as those of the first embodiment. The differences between the third embodiment and the first embodiment will be described below, while the similarities will not be described in detail.

[0072] In the third embodiment, along the conveying direction X of the auger 100, the inner diameter of at least a portion of the second spiral structure 130 gradually decreases, and the pitch of at least a portion of the second spiral structure 130 gradually increases. Therefore, in the third embodiment, the second spiral structure 130 varies both its inner diameter and pitch along the conveying direction X of the auger 100, thereby maximizing the material carrying capacity per unit axial length of the second spiral structure 130 and significantly mitigating the problem of material eccentricity during discharge.

[0073] This invention provides a spreading device. Figure 7 , Figure 8 This is a perspective view and a top view of an embodiment of the spreading device of the present invention. The spreading device includes a housing 200, a spreading assembly 300, and a conveying auger 100 of any of the aforementioned embodiments.

[0074] The housing 200 has a material conveying channel 210, a spreading chamber 220 and a material inlet 230. The spreading chamber 220 is connected to one end of the material conveying channel 210, and the material inlet 230 is located on one side of the circumference of the material conveying channel 210.

[0075] The conveying auger 100 includes an auger body 110, a first spiral structure 120, and a second spiral structure 130. The first spiral structure 120 and the second spiral structure 130 are sequentially arranged on the outer periphery of the auger body 110 along its axial direction. When the auger body 110 is rotating, the first spiral structure 120 and the second spiral structure 130 can convey materials axially. The number of spirals in at least a portion of the second spiral structure 130 is less than the number of spirals in the first spiral structure 120.

[0076] The conveying auger 100 is installed in the conveying channel 210. The inlet 230 exposes part of the first spiral structure 120 of the conveying auger 100. The conveying auger 100 is used to convey materials from the inlet 230 to the spreading chamber 220.

[0077] In this embodiment, the material is, for example, seeds, fertilizer, etc.

[0078] The spreading assembly 300 is at least partially located in the spreading chamber 220, and the spreading assembly 300 is used to spread the material in the spreading chamber 220 outward.

[0079] According to an embodiment of the present invention, a spreading device includes a conveying auger 100. A first spiral structure 120 and a second spiral structure 130 of the conveying auger 100 are sequentially arranged on the outer periphery of the auger body 110 along the axial direction of the auger body 110. The number of spirals in at least a portion of the second spiral structure 130 is less than the number of spirals in the first spiral structure 120. The smaller number of spirals in at least a portion of the second spiral structure 130 results in a larger material holding space per unit axial length compared to the first spiral structure 120. The material is more loose at the second spiral structure 130, and the friction between the material and the second spiral structure 130 is smaller, thereby further reducing the tangential velocity of the material at the second spiral structure 130. After being conveyed by the second spiral structure 130, the material falls into the spreading chamber 220, which can significantly alleviate the problem of material eccentricity during material falling from the conveying auger 100.

[0080] In some embodiments, the spreading device further includes a first rotation drive 400, which is mounted on the housing 200 and connected to the conveying auger 100 in a driving manner. The first rotation drive 400 is capable of driving the conveying auger 100 to rotate. The first rotation drive 400 is, for example, a motor.

[0081] In some embodiments, the housing 200 further includes a dispensing port 240 located on one side of the dispensing chamber 220. The dispensing assembly 300 includes, for example, a dispensing disc 310 and a second rotation drive 320. The dispensing disc 310 is rotatably connected to the dispensing chamber 220, and the second rotation drive 320 is drively connected to the dispensing disc 310 to drive the dispensing disc 310 to rotate. When the dispensing disc 310 rotates, it dispenses the material in the dispensing chamber 220 outward from the dispensing port 240.

[0082] This invention also provides an unmanned aerial vehicle (UAV) comprising a fuselage and a dispersing device according to any of the foregoing embodiments, the dispersing device being mounted on the fuselage. The fuselage drives the dispersing device in flight. The dispersing device includes a housing 200, a dispersing assembly 300, and a conveying auger 100. The conveying auger 100 includes an auger body 110, a first spiral structure 120, and a second spiral structure 130. The first spiral structure 120 and the second spiral structure 130 are sequentially arranged along the axial direction of the auger body 110 on its outer periphery. When the auger body 110 is in a rotating state, the first spiral structure 120 and the second spiral structure 130 can convey material along the axial direction. The number of spirals in at least a portion of the second spiral structure 130 is less than the number of spirals in the first spiral structure 120.

[0083] According to an embodiment of the present invention, the drone's dispersing device includes a conveying auger 100. In the conveying auger 100, the number of spirals in at least a portion of the second spiral structure 130 is less than the number of spirals in the first spiral structure 120. This results in the material holding space of the second spiral structure 130 per unit axial length being larger than that of the first spiral structure 120. The material is more loose at the second spiral structure 130, and the friction between the material and the second spiral structure 130 is smaller, thereby further reducing the tangential velocity of the material at the second spiral structure 130. After being conveyed by the second spiral structure 130, the material falls into the dispersing chamber 220, which can significantly alleviate the problem of material eccentricity when the conveying auger 100 discharges material.

[0084] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A material conveying auger for conveying materials in a spreading device, characterized in that, The conveying auger includes: Screw auger body; The first spiral structure and the second spiral structure are sequentially arranged on the outer periphery of the auger body along the axial direction of the auger body. When the auger body is in a state of rotational motion, the first spiral structure and the second spiral structure can transport materials along the axial direction. Wherein, the number of spirals in at least a portion of the second spiral structure is less than the number of spirals in the first spiral structure; the second spiral structure includes a transition section and a conveying section, and the first spiral structure, the transition section, and the conveying section are arranged and connected in sequence along the conveying direction of the conveying auger; wherein, the first spiral structure is a multi-spiral structure, and the second spiral structure is a single-spiral structure in the conveying section, so that the material falls into the target falling area after being conveyed by the second spiral structure, which can alleviate the problem of material eccentricity when the conveying auger discharges material; The first spiral structure includes at least two first blades spirally arranged around the outer periphery of the auger body, and the second spiral structure includes at least one second blade spirally arranged in the conveying section and a transition blade spirally arranged in the transition section. At least one first blade is continuously connected to a corresponding second blade through the transition blade, and the connection between the at least one first blade and the transition blade is terminated at the transition section.

2. The conveying auger as described in claim 1, characterized in that, The number of spirals in the transition section of the second spiral structure is set to decrease along the conveying direction.

3. The conveying auger as described in claim 2, characterized in that, The number of spirals in the transition section of the second spiral structure is set to gradually decrease along the conveying direction.

4. The conveying auger as described in claim 1, characterized in that, At least one of the first blades has a notch at the connection point with the corresponding transition blade.

5. The conveying auger as described in claim 1, characterized in that, Along the conveying direction of the conveying auger, the inner diameter of at least a portion of the second spiral structure gradually decreases.

6. The conveying auger as described in claim 1, characterized in that, The pitch of the second helical structure is greater than that of the first helical structure in at least a portion of the region.

7. The conveying auger as described in claim 6, characterized in that, Along the conveying direction of the conveying auger, the pitch of the second spiral structure gradually increases in at least a portion of the region.

8. The conveying auger as described in claim 1, characterized in that, The outer diameter of at least a portion of the second helical structure is larger than the outer diameter of the first helical structure.

9. A spreading device, characterized in that, include: The housing has a material conveying channel, a dispensing chamber, and a material inlet. The dispensing chamber is connected to one end of the material conveying channel, and the material inlet is located on one circumferential side of the material conveying channel. The conveying auger as described in any one of claims 1 to 8, wherein the conveying auger is installed in the conveying channel, the inlet is capable of exposing a portion of the first spiral structure of the conveying auger, and the conveying auger is used to convey material from the inlet to the dispensing chamber; as well as A dispensing assembly, at least partially located in the dispensing chamber, is used to dispense material from the dispensing chamber outwards.

10. A drone, characterized in that, include: body; as well as The spreading device as described in claim 9 is mounted on the machine body.

Images