Unmanned aerial vehicle rotor wing protection device

Abstract

The utility model relates to the technical field of unmanned aerial vehicle rotor protection, in particular to an unmanned aerial vehicle rotor protection device. The protection device comprises a protection cover which surrounds the periphery of the unmanned aerial vehicle rotor wing through a fixing assembly. The upper end and the lower end of the protective cover are open, any cross section of the protective cover is round, and the caliber of the upper end of the protective cover is larger than that of the lower end of the protective cover. By designing the big-end-up protective cover with two open ends, the flared protective cover further increases the flow velocity of the rotor wing airflow on the premise of not changing the original airflow of the unmanned aerial vehicle rotor wing, thereby increasing the lift force of the unmanned aerial vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicle (UAV) rotor protection, in particular to a UAV rotor protection device. Background Art

[0002] Drones are widely used in modern society, covering a wide range of fields from military reconnaissance, environmental monitoring to unmanned delivery. With the continuous advancement of drone technology, its rotor, as one of the key components, faces more and more safety risks.

[0003] The rotors of drones rotate at high speeds during flight, posing a potential threat to the surrounding environment and personnel safety. For example, the rotors may cause damage to people or objects, especially during takeoff and landing. In addition, the safety risks of the rotors are more prominent when drones are operated indoors or in crowded environments.

[0004] After consulting the information and combining it with the actual situation, drone rotor protection devices have appeared on the market, but they have not been widely used. The technical problems they face are:

[0005] Existing rotor protection devices are mostly fan cover style, the grid cuts or blocks the rotor airflow, changes the aerodynamics of the UAV rotor, and thus affects the control of the UAV; moreover, any structural protection device increases the weight of the UAV and reduces the UAV's endurance. Summary of the invention

[0006] The utility model aims at the technical problems existing in the prior art and provides a drone rotor protection device to solve the problem that the existing drone protection device has a significant impact on the original performance of the drone.

[0007] The technical solution of the utility model to solve the above technical problems is as follows:

[0008] Provided is a drone rotor protection device, comprising a protective cover that surrounds the drone rotor through a fixing assembly; the upper and lower ends of the protective cover are both open, any cross-section of the protective cover is circular, and the upper end diameter of the protective cover is larger than the lower end diameter.

[0009] Furthermore, the middle section of the protective cover is in the shape of an inverted trumpet, and the angle between the hypotenuse of the middle section and any vertical line on the middle section is greater than 50°.

[0010] Furthermore, the fixing assembly includes:

[0011] A clamp for fixing the protective cover; a fixing seat for installing the clamp; and an adjustment base for supporting and adjusting the fixing seat.

[0012] Furthermore, the protective cover is provided with an annular groove for installing the clamp; at least one folded end of the clamp is provided with a polygonal hole for preventing the clamp from swinging; the fixing seat is clamped with the folded end and fixed by a fastening assembly.

[0013] Furthermore, the upper part of the adjustment base is provided with a first slide groove for sliding installation of the fixing base, which is used to adjust the lateral position of the protective cover; the lower part of the adjustment base is provided with two adjustment parts assembled with the arms of the drone, and any of the adjustment parts is provided with a second slide groove, which is used to adjust the vertical position of the protective cover; the two adjustment parts are fixed by bolts.

[0014] Furthermore, a limit plate is provided at the joint between the bolt and the machine arm to prevent the adjustment base from swinging.

[0015] Furthermore, the protective cover is not hollowed out.

[0016] Furthermore, a guide column is provided on the fixing seat, and a guide hole is correspondingly provided on the upper part of the adjusting base; the guide column is slidably installed in the guide hole, and the fixing seat and the first slide groove are fixed by an adjusting nut.

[0017] Furthermore, the protective device is made of a lightweight hard material.

[0018] The beneficial effects of the utility model are:

[0019] The utility model designs a protective cover with openings at both ends and a larger upper part and a smaller lower part. Under the premise of not changing the original airflow of the UAV rotor, the trumpet-shaped protective cover further increases the flow rate of the rotor airflow, thereby increasing the lift of the UAV.

[0020] In addition, the protective cover has a certain ability to block high-altitude turbulence, preventing crosswinds from changing the direction and size of the rotor airflow, thereby improving the stability of the drone's flight.

[0021] Furthermore, the outer wall of the protective cover forms a structure similar to the spoiler on the front of an airplane wing. No matter which direction the drone moves, the annular protective cover can act as a spoiler, further increasing the lift of the drone, which can not only offset the negative impact of the drone's rotor protection device's own gravity on the drone's endurance, but also increase the drone's endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall schematic diagram of the assembly of the utility model and the UAV;

[0023] Figure 2 It is a schematic diagram of the assembly of the utility model and the rotor;

[0024] Figure 3 It is a side view of the utility model assembled with the rotor;

[0025] Figure 4 for Figure 3 Sectional view at "AA" in the figure;

[0026] Figure 5 It is a side view of the overall structure of the utility model;

[0027] Figure 6 It is a schematic diagram of the overall structure of the utility model;

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. fixing assembly; 11. clamp; 12. fixing seat; 121. guide column; 13. adjusting base; 131. first slide groove; 132. adjusting part; 1321. second slide groove; 133. guide hole;

[0030] 2. Protective cover; 21. Ring groove;

[0031] 3. Bolt; 31. Limit plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. In addition, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0033] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "left", "right", "horizontal", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. 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. Therefore, they should not be understood as limitations on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use scenarios of other materials.

[0037] The utility model provides the following preferred embodiments: Example

[0038] In order to solve the problem that the existing UAV rotor protection device affects the original performance of the UAV, this embodiment proposes a structural design of a protection device, so that it can reduce the impact on the aerodynamic performance of the UAV as much as possible while providing effective protection.

[0039] like Figures 1 to 6 As shown, the protective device includes a protective cover 2 that surrounds the UAV rotor through a fixing component 1; the upper and lower ends of the protective cover 2 are both open, any cross-section of the protective cover 2 is circular, and the upper end diameter of the protective cover 2 is larger than the lower end diameter.

[0040] Specifically, the upper and lower ends of the protective cover 2 are both open structures, and any cross section thereof is circular, and the diameter of the upper end is larger than the diameter of the lower end. It is understandable that the diameter of the upper end opening of the protective cover 2 needs to be larger than the diameter of the lower end opening to form a tapered structure, so that the protective cover 2 can maximize the smooth flow of airflow while surrounding the rotor.

[0041] It should be understood that the protective cover 2 in this embodiment is made of a light and hard material, such as carbon fiber or high-strength plastic, which not only ensures the robustness of the protective cover 2, but also effectively reduces the weight, minimizing the impact on the endurance of the drone. Moreover, this material has high impact resistance and durability, and can maintain stable performance under different environmental conditions.

[0042] Furthermore, the upper and lower openings of the protective cover 2 are designed to provide uniform airflow in different flight postures. The protective cover 2 not only provides protection for the rotor when the drone is stationary, but also optimizes the airflow distribution through its shape during the flight of the drone, thereby enhancing the aerodynamic performance of the drone. The wide-diameter design of the upper end of the trumpet-shaped protective cover 2 plays a role in collecting and guiding airflow to a certain extent, effectively increasing the air flow rate near the rotor, thereby enhancing the lift of the drone.

[0043] Furthermore, the protective cover 2 is reliably connected to the drone body through the fixing assembly 1. The fixing assembly 1 can be implemented in various forms, such as bolt 3 clamp 11 type fixing, clamping mechanism clamping fixing, etc.

[0044] The benefit of this embodiment is that the protective cover 2 with a specific structural design can not only effectively protect the drone rotor and the surrounding environment, but also avoid excessive interference of existing protective devices on the airflow, and finally achieve the height of improving the flight stability and endurance of the drone. Through this embodiment, reliable rotor protection can be provided in various application scenarios of the drone, while minimizing the impact on the overall performance of the drone or even improving its original performance. Example

[0045] According to the UAV rotor protection device described in the above-mentioned embodiments, this embodiment further optimizes the structural design of the protective cover 2 to achieve better aerodynamic performance.

[0046] like Figure 4 As shown, the middle section of the protective cover 2 is in the shape of an inverted trumpet, and the angle α between the hypotenuse of the middle section and any vertical line on the middle section is greater than 50°.

[0047] Specifically, the middle section of the protective cover 2 presents an inverted trumpet-shaped geometric configuration, which can significantly improve the airflow characteristics while protecting the rotor. Specifically, the angle α between the hypotenuse of the middle section and any vertical line on the middle section is limited to be greater than 50°, because according to aerodynamic research, once the angle of the turbulence is greater than 40°, the angle α is limited to be greater than 50°. In this way, the turbulence angle of the protective cover 2 can be less than 40°, thereby avoiding increasing the navigation burden of the drone and playing a role in smoothing the turbulence.

[0048] It should be understood that when the spoiler angle of the protective cover 2 is less than 40°, the protective cover 2 can effectively guide the airflow without significantly increasing the windward area. This design allows the air to flow more smoothly when passing through the protective cover 2, reducing the generation of eddies and thus reducing energy losses. When the airflow blows through the protective cover 2, it exerts a certain thrust on the protective cover 2, and the upward component of the thrust forms the lift of the drone.

[0049] In addition, in order to further optimize the aerodynamic performance, the inner and outer surfaces of the protective cover 2 may be specially treated, such as adding a coating or providing flow-guiding grooves, etc., to reduce surface friction.

[0050] The benefit of this embodiment is that by limiting the angle of the middle cross-section edge of the protective cover 2, the shape of the protective cover 2 is limited, and while providing effective protection, the aerodynamic performance of the drone is improved. Not only does it reduce wind resistance, but it can also provide additional lift in a specific flight state, thereby increasing the endurance and flight stability of the drone. Example

[0051] According to the UAV rotor protection device described in the above-mentioned embodiment, the present embodiment further refines the structural design of the fixing component 1 to achieve stable installation and adjustment of the protective cover 2 within a certain range.

[0052] like Figures 2 to 6 As shown, the fixing assembly 1 includes three main parts: a clamp 11 for fixing the protective cover 2, a fixing seat 12 for installing the clamp 11, and an adjustment base 13 for supporting and adjusting the fixing seat 12. This structure not only ensures a firm connection between the protective cover 2 and the drone body, but also provides multi-dimensional adjustment capabilities to meet the needs of different models of drones and different installation environments.

[0053] It should be understood that the clamp 11, as a component that is in direct contact with the protective cover 2, should ensure its strength and hardness. This embodiment recommends the use of an elastic clamp 11 made of a high-strength alloy material, the inner wall of which can be covered with a non-slip rubber layer. This not only ensures the strength and durability of the clamp 11, but also avoids damage to the surface of the protective cover 2 during the tightening process. A fine-tuning mechanism can be provided at the opening of the clamp 11 to achieve tension adjustment through precise threads to ensure that the protective cover 2 can remain stable under various flight conditions.

[0054] Furthermore, the fixing seat 12, as an intermediate piece connecting the clamp 11 and the adjustment base 13, can be made of lightweight aviation-grade aluminum alloy to ensure high strength and low weight. The fixing seat 12 can also be provided with a plurality of preset holes, and the installation position can be flexibly adjusted according to different drone models.

[0055] It is understandable that the adjustment base 13, as the basis of the entire fixing assembly 1, should have a certain range of adjustment capabilities. The adjustment base 13 can be designed in a modular manner, and the surface of the base can be provided with a fine-tuning slide groove in the XY plane, which can be used in conjunction with a locking mechanism to achieve the positioning of the protective cover 2 in the horizontal plane. In the vertical direction, the adjustment base 13 can adopt a multi-stage telescopic structure.

[0056] The benefit of this embodiment is that, through the three-layer fixing assembly 1 structure, the protective cover 2 is stably installed and adjusted within a certain range, thereby improving the applicability and reliability of the protective device. Example

[0057] According to the fixing assembly 1 of the UAV rotor protection device described in the above-mentioned embodiment, this embodiment further optimizes the connection structure between the protective cover 2, the clamp 11 and the fixing seat 12 to improve the stability of the overall device.

[0058] like Figure 6 As shown, the protective cover 2 is provided with an annular groove 21 for installing the clamp 11; at least one folded end of the clamp 11 is provided with a polygonal hole for preventing the clamp 11 from swinging; the fixing seat 12 is clamped with the folded end and fixed by a fastening assembly.

[0059] Specifically, the cross section of the annular groove 21 can be a special trapezoidal structure, which not only increases the contact area with the clamp 11, but also provides positioning in both radial and axial directions. The inner wall of the annular groove 21 can be surface treated to form a concave-convex structure, which can increase friction to enhance the fixing effect of the clamp 11.

[0060] It should be understood that the clamp 11 needs to be lightweight while ensuring strength. In addition, a polygonal hole is designed on at least one folded end of the clamp 11. This geometric configuration can effectively prevent the clamp 11 from swinging under high-speed rotation and severe vibration environments.

[0061] Furthermore, the design of the fixing seat 12 takes into account the clamping requirements with the folded end of the clamp 11. The fixing seat 12 is designed with mounting ears that match the folded end of the clamp 11 at the corresponding position, and the cooperation between the two ensures that automatic clamping can be achieved during assembly.

[0062] The benefit of this embodiment is that, by designing the annular groove 21, the polygonal hole and the corresponding clamping structure, a stable connection between the protective cover 2, the clamp 11 and the fixing seat 12 is achieved, thereby improving the rigidity and vibration resistance of the overall structure. Example

[0063] According to the fixing assembly 1 of the UAV rotor protection device described in the aforementioned embodiment, this embodiment further optimizes the structural design of the adjustment base 13 to achieve proper adjustment of the protective cover 2 in multiple dimensions, thereby adapting to the needs of different models of UAVs and various installation environments.

[0064] like Figure 2 and Figure 6 As shown, the upper part of the adjustment base 13 is provided with a first slide groove 131 for sliding installation of the fixing base 12, which is used to adjust the lateral position of the protective cover 2; the lower part of the adjustment base 13 is provided with two adjustment parts 132 assembled with the arms of the drone, and any of the adjustment parts 132 is provided with a second slide groove 1321, which is used to adjust the vertical position of the protective cover 2; the two adjustment parts 132 are fixed by bolts 3.

[0065] Specifically, a first slide groove 131 for slidingly installing the fixing seat 12 is designed on the upper part of the adjustment base 13. Since the fixing seat 12 is fixedly connected to the protective cover 2, the lateral distance of the protective cover 2 can be adjusted by adjusting the assembly position of the fixing seat 12 and the first slide groove 131 to adapt to the UAV rotor that needs to be protected.

[0066] It should be understood that two adjustment parts 132 for assembly with the drone arm are designed at the lower part of the adjustment base 13. This dual adjustment structure enhances the stability of the entire device. Each adjustment part 132 is provided with a second slide groove 1321 for adjusting the vertical position of the protective cover 2. These second slide grooves 1321 can provide an appropriate adjustment range and maintain the best mechanical fixing ability at any position.

[0067] Furthermore, the two adjusting parts 132 are fixed by bolts 3. This design not only provides a reliable connection, but also adds an additional adjustment dimension to the entire system. The bolts 3 used should be made of high-strength and lightweight materials to reduce the deadweight of the utility model.

[0068] The benefit of this embodiment is that, by designing a multi-dimensional adjustment structure, the protection cover 2 can be adjusted in the lateral and vertical positions, thereby improving the applicability of the protection device. Example

[0069] According to the structure of the adjustment base 13 of the UAV rotor protection device recorded in the aforementioned embodiment, this embodiment further optimizes the connection structure between the bolt 3 and the UAV arm, and effectively solves the possible swing problem of the adjustment base 13 by introducing the limit plate 31 design, thereby improving the stability of the entire protection device.

[0070] like Figure 6 As shown, a limit plate 31 is provided at the joint between the bolt 3 and the machine arm to prevent the adjustment base 13 from swinging.

[0071] It should be explained that the limit plate 31 and the bolt 3 can be designed as an integral body, and should have high rigidity and strength while ensuring light weight. The geometric shape of the limit plate 31 can not only fit the surface contour of the arm, but also provide balanced support in all directions, effectively preventing any unnecessary swing of the adjustment base 13 during flight.

[0072] The benefit of this embodiment is that the well-designed limit plate 31 structure effectively solves the swing problem that may occur in the adjustment base 13, and improves the stability and reliability of the entire protective device. It not only provides an excellent fixing effect under static conditions, but also can dynamically adapt to various complex stress states during flight. Example

[0073] According to the structure of the protective cover 2 of the UAV rotor protection device described in the above embodiment, this embodiment specifically limits it to not being hollowed out, because once hollowed out, its ability to turbulence is weakened. It is understandable that, although the protective cover 2 is not hollowed out, in order to reduce its weight and ensure its strength, a hollow structure or a hollow multi-layer structure can be provided, which has both the effect of turbulence and the strength of not being easily deformed.

[0074] The benefit of this embodiment is that a spoiler structure is formed by providing a non-hollow protective cover 2. During the navigation of the UAV, the protective cover 2 can provide a certain lift for the UAV, thereby compensating for or enhancing the range of the UAV. Example

[0075] According to the structure of the adjustment base 13 of the UAV rotor protection device recorded in the aforementioned embodiment, this embodiment refines the connection and guiding mechanism between the fixing base 12 and the adjustment base 13, introduces the guide column 121 and the guide hole 133, and adopts an adjustment nut fixing scheme to achieve more stable and precise position adjustment of the protective cover 2.

[0076] like Figure 3 , Figure 5 and Figure 6 As shown, a guide column 121 is provided on the fixing seat 12, and a guide hole 133 is provided on the upper part of the adjusting base 13 correspondingly;

[0077] The guide column 121 is slidably installed in the guide hole 133, and the fixing seat 12 and the first sliding groove 131 are fixed by an adjusting nut.

[0078] The benefit of this embodiment is that the adjustment female fixing scheme of the guide column 121 and the guide hole 133 structure realizes the lateral adjustment of the position of the protective cover 2. Through this embodiment, the UAV rotor protection device can adapt to different UAVs, improving the applicability of the protection device. Example

[0079] According to the overall structure of the UAV rotor protection device recorded in the above-mentioned embodiments, this embodiment further optimizes the material selection of the protection device and adopts lightweight hard material to achieve a balance between high strength and low weight, thereby improving the flight performance and protection effect of the UAV.

[0080] It is understandable that in order to further improve the performance of the material, the present embodiment can introduce nano-coating technology on the surface of the lightweight hard material. The coating is a composite of graphene and titanium dioxide nanoparticles, which not only has super-hydrophobic and self-cleaning functions, but also effectively absorbs and scatters radar waves, thereby improving the stealth performance of the drone. The thickness of the coating is precisely controlled by atomic layer deposition technology to ensure that the weight of the device is not significantly increased. In addition, considering the needs of different flight missions, a replaceable functional module system is designed in this embodiment. These modules are made of the same lightweight hard material, but are optimized for different application scenarios. For example, modules for high-altitude flight have added additives that resist UV and ozone aging, while modules for marine environments have enhanced resistance to salt spray corrosion.

[0081] The benefit of this embodiment is that by using lightweight hard materials, a balance between strength, weight and functionality of the protective device is achieved. Not only does it improve the flight performance and safety of the drone, but it also gives the protective device more functions and adaptability through the application of materials. Through this embodiment, the drone rotor protective device can provide reliable protection in various extreme environments and complex tasks, while minimizing the impact on flight performance, providing strong technical support for the application expansion of drones.

[0082] The beneficial effects of the present invention are specifically embodied in that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A UAV rotor protection device, characterized in that: The protective device comprises a protective cover (2) surrounding the rotor of the drone via a fixing assembly (1); The upper and lower ends of the protective cover (2) are both open, any cross-section of the protective cover (2) is circular, and the diameter of the upper end of the protective cover (2) is larger than the diameter of the lower end thereof.

2. The UAV rotor protection device according to claim 1, characterized in that: The middle section of the protective cover (2) is in the shape of an inverted trumpet, and the angle between the hypotenuse of the middle section and any vertical line on the middle section is greater than 50°.

3. The UAV rotor protection device according to claim 1, characterized in that: The fixing assembly (1) comprises: A clamp (11) for fixing the protective cover (2); A fixing seat (12) for mounting the clamp (11); and An adjustment base (13) for supporting and adjusting the fixing base (12).

4. The UAV rotor protection device according to claim 3, characterized in that: The protective cover (2) is provided with an annular groove (21) for mounting the clamp (11); A polygonal hole is provided on at least one folded end of the clamp (11) to prevent the clamp (11) from swinging; The fixing seat (12) is clamped with the folded end and fixed by a fastening assembly.

5. The UAV rotor protection device according to claim 3, characterized in that: The upper part of the adjustment base (13) is provided with a first slide groove (131) for slidingly mounting the fixing base (12), which is used to adjust the lateral position of the protective cover (2); the lower part of the adjustment base (13) is provided with two adjustment parts (132) assembled with the arms of the drone; any of the adjustment parts (132) is provided with a second slide groove (1321), which is used to adjust the vertical position of the protective cover (2); The two adjusting parts (132) are fixed by bolts (3).

6. The UAV rotor protection device according to claim 5, characterized in that: A limit plate (31) is provided at the joint between the bolt (3) and the machine arm, for preventing the adjustment base (13) from swinging.

7. The UAV rotor protection device according to claim 2, characterized in that: The protective cover (2) is not hollowed out.

8. The UAV rotor protection device according to claim 5, characterized in that: The fixing seat (12) is provided with a guide column (121), and a guide hole (133) is correspondingly provided on the upper part of the adjusting base (13); The guide column (121) is slidably mounted in the guide hole (133), and the fixing seat (12) and the first sliding groove (131) are fixed via an adjusting nut.

9. The UAV rotor protection device according to claim 1, characterized in that: The protective device is made of light and hard material.

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