Unmanned aerial vehicle outer frame and unmanned aerial vehicle

Abstract

This utility model relates to the field of unmanned aerial vehicle (UAV) manufacturing technology, and discloses a UAV frame and a UAV. The UAV frame includes a frame assembly and an air inlet lip. The frame assembly is located on the outer periphery of the UAV body and includes a frame body and guide vanes. An air inlet is formed on the frame body, and the guide vanes are mounted on the frame body and housed within the air inlet. The guide vanes are rotatably connected to the frame body, allowing the air inlet to open and close. The air inlet lip is connected to the top of the frame body, and its top folds outwards. This design allows for increased lift during takeoff by utilizing the outward-folding lip, and also reduces frontal area during level flight by adjusting the opening and closing of the guide vanes, thereby reducing flight drag. This optimizes performance under different flight conditions and improves the overall flight efficiency and adaptability of the UAV.

Description

Technical Field

[0001] This utility model relates to the field of drone manufacturing technology, and in particular to drone frames and drones. Background Technology

[0002] With the rapid development of drone technology, various types of drones have been widely used in aerial photography, logistics, surveying and mapping, and optimizing their flight performance has always been a key research focus in the industry. The drone's outer frame provides physical protection for core components such as motors and propellers, preventing damage from collisions and entanglement. It also optimizes the aerodynamic structure to increase lift and reduce drag, provides stable support for each component to ensure overall structural rigidity, and serves as a carrier for functional expansion to adapt to different loads and environments. Therefore, it is a crucial structure for ensuring the safe operation of drones, optimizing flight performance, and expanding application scenarios.

[0003] Currently, some drone frames have outward-curving lips on the frame body to provide additional lift during takeoff. However, during level flight, the outward-curving lips increase the structure's frontal area, leading to increased flight drag. At the same time, the fixed airflow guiding structure cannot adjust the opening and closing of the air inlet according to the level flight state, further aggravating drag and affecting level flight efficiency.

[0004] Therefore, there is an urgent need for a drone frame that can solve the problems of excessive drag and poor lift-drag compatibility caused by unreasonable frame structure design in different flight states. Utility Model Content

[0005] The purpose of this utility model is to provide a drone frame that can solve the problems of excessive drag and poor lift-drag compatibility caused by unreasonable frame structure design in different flight states.

[0006] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0007] A drone frame, comprising:

[0008] The outer frame assembly is located on the outer periphery of the UAV body. The outer frame assembly includes an outer frame body and a guide vane. An air inlet is opened on the outer frame body. The guide vane is installed on the outer frame body and is accommodated in the air inlet. The guide vane is rotatably connected to the outer frame body and can open and close the air inlet.

[0009] An air intake lip is connected to the upper part of the outer frame body, and the top of the air intake lip is folded outward.

[0010] As an optional solution for the drone's outer frame, the air intake lip is an arc-shaped lip that folds from bottom to top and from the inside out.

[0011] As an optional solution for the drone's outer frame, the air intake lip is glued to the frame body.

[0012] As an optional solution for the drone's outer frame, the outer frame body is provided with four parts, which are equidistant from each other and surround the outer periphery of the drone body. The outer frame body is curved.

[0013] As an optional solution for the drone's outer frame, the outer frame assembly includes a first connector, the two ends of which are respectively connected to two adjacent outer frame bodies.

[0014] As an optional solution for the drone's outer frame, the guide vane is a sheet-like structure that is thick in the middle and thin at both sides.

[0015] As an optional solution for the drone's outer frame, the drone's outer frame also includes a rotating unit, which includes:

[0016] A rotation drive component is mounted on the outer frame body;

[0017] A linkage component is provided at intervals below the outer frame body, and the linkage component is connected to the output end of the rotation drive component;

[0018] The first rotating shaft is fixedly connected to the guide vane and is connected to the linkage assembly. The linkage assembly is used to drive the first rotating shaft to rotate under the drive of the rotation drive member, thereby realizing the rotation of the guide vane relative to the outer frame body.

[0019] As an optional solution for the drone's outer frame, the linkage component includes:

[0020] A bidirectional short link, one end of which is connected to the first rotating shaft;

[0021] A bidirectional long link, wherein the opposite end of the bidirectional short link is rotatably connected to the beginning end of the bidirectional long link;

[0022] The second pivot passes through both the bidirectional long link and the bidirectional short link;

[0023] A crank, one end of which is connected to the rotary drive component;

[0024] The first nut is screwed onto the opposite end of the crank, which passes through the tail end of the bidirectional connecting rod.

[0025] As an optional solution for the drone's outer frame, multiple guide vanes are provided, arranged along the contour of the outer frame body. Multiple bidirectional long connecting rods, multiple bidirectional short connecting rods, and multiple second rotating shafts are provided. Two adjacent bidirectional long connecting rods are connected end to end. The second rotating shaft passes through the head end of one of the two adjacent bidirectional long connecting rods, the tail end of the other of the two adjacent bidirectional long connecting rods, and one end of the bidirectional short connecting rod. The two adjacent bidirectional long connecting rods and the bidirectional short connecting rods connected to them can be rotatably connected.

[0026] A drone includes a drone body and a drone frame. The drone body includes a drone fuselage and a propeller, the propeller being mounted on the drone fuselage and the drone fuselage being mounted inside the drone frame.

[0027] The beneficial effects of this utility model are as follows:

[0028] This utility model proposes a drone outer frame. The outer frame assembly is set on the outer periphery of the drone body. The outer frame assembly includes an outer frame body and guide vanes. An air inlet is opened on the outer frame body. The guide vanes are installed on the outer frame body and are accommodated in the air inlet. The guide vanes are rotatably connected to the outer frame body, which can open and close the air inlet. An air inlet lip is connected to the upper part of the outer frame body. The top of the air inlet lip is folded outward. This allows the drone to increase lift during takeoff by using the outward-folding lip, and reduce the frontal area by adjusting the opening and closing of the guide vanes during level flight, thereby reducing flight drag. This optimizes performance under different flight conditions and improves the overall flight efficiency and adaptability of the drone. Attached Figure Description

[0029] Figure 1 This is a first structural schematic diagram of the drone outer frame provided in this embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the second structure of the drone outer frame provided in this embodiment of the utility model;

[0031] Figure 3 This is a schematic diagram of the third structure of the drone frame provided in this embodiment of the utility model;

[0032] Figure 4 This is a schematic diagram of the fourth structure of the drone frame provided in this embodiment of the utility model.

[0033] In the picture:

[0034] 1. Outer frame assembly; 11. Outer frame body; 12. Guide vane; 13. First connector;

[0035] 2. Air intake lip;

[0036] 3. Rotating unit; 31. Rotating drive component; 32. Linkage assembly; 321. Bidirectional short connecting rod; 322. Bidirectional long connecting rod; 323. Second rotating shaft; 324. Crank; 33. First rotating shaft. Detailed Implementation

[0037] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] This embodiment provides a drone frame, such as Figures 1-2As shown, in this embodiment, the drone's outer frame includes an outer frame assembly 1 and an air inlet lip 2. The outer frame assembly 1 is disposed on the outer periphery of the drone body. The outer frame assembly 1 includes an outer frame body 11 and a guide vane 12. An air inlet is provided on the outer frame body 11. The guide vane 12 is installed on the outer frame body 11 and is accommodated in the air inlet. The guide vane 12 is rotatably connected to the outer frame body 11 and can open and close the air inlet. The air inlet lip 2 is connected to the upper part of the outer frame body 11, and the top of the air inlet lip 2 is folded outward. During takeoff, the drone requires significant lift to overcome gravity and lift off the ground. In the outer frame assembly 1, the outward-folding design of the top of the air intake lip 2 creates a guiding effect on the airflow as it passes through the lip. The outward-folding lip expands the air intake area, allowing more airflow to smoothly enter the outer frame. Simultaneously, the folding shape creates an upward component of the airflow at the lip. The effective introduction of airflow and the superposition of this upward component directly increase the overall lift of the drone, meeting the high lift requirement during takeoff. During level flight, the drone has reached a stable altitude, and it is even more important to reduce flight drag to improve endurance and efficiency. The air inlet on the outer frame body 11 is equipped with rotatable guide vanes 12, which are housed within the air intake... In the air inlet, when the guide vane 12 is closed, the vane can completely cover the air inlet, making the outer frame surface form a continuous and smooth shape, avoiding the formation of turbulence in the airflow from the air inlet. When the guide vane 12 is partially open, the air intake can be adjusted by controlling the opening and closing angle to reduce unnecessary airflow impact. Both states can reduce the windward area of ​​the outer frame, thereby reducing air resistance and adapting to the performance requirements of the level flight phase. The above settings can increase lift during takeoff by using the outward-curving lip, and reduce the windward area by adjusting the opening and closing of the guide vane 12 during level flight, thereby reducing flight resistance. It takes into account the performance optimization under different flight conditions and improves the overall flight efficiency and adaptability of the UAV.

[0043] Preferably, such as Figures 1-2 As shown, in this embodiment, the air intake lip 2 is an arc-shaped lip that folds from bottom to top and from the inside to the outside. When airflow passes through, the arc-shaped structure can guide the airflow more smoothly, further enhancing the guiding effect. This not only expands the air intake area to introduce more airflow, but also makes the airflow form a more stable and stronger upward force at the lip, thereby more effectively increasing lift during the takeoff phase and meeting the high lift requirements of the UAV when it leaves the ground. At the same time, the arc-shaped design can reduce the drag caused by airflow impact compared with other folding shapes, improving air intake efficiency and flight stability.

[0044] Optionally, in this embodiment, the air intake lip 2 and the outer frame body 11 are glued together, which can achieve a tight fixation between the two, ensure the sealing of the connection, and prevent airflow leakage from the connection point, thus affecting the air intake efficiency and lift effect. At the same time, the glued connection does not require additional connectors, does not form a protruding structure on the surface of the outer frame, maintains the overall smooth shape of the outer frame, reduces air resistance caused by connectors, and the glued connection is simple to operate. It can adapt to the complex connection surface between the curved lip and the outer frame body 11, ensuring connection strength while reducing overall weight, and further optimizing the flight performance of the UAV. In other embodiments, the air intake lip 2 and the outer frame body 11 can also be connected by snap-fit ​​or welding.

[0045] Optionally, in this embodiment, both the drone frame and the air intake lip 2 are made of honeycomb hollow carbon fiber material. Utilizing the material's high strength and low density, this significantly reduces the overall weight while ensuring the structural stability of the outer frame assembly 1 to withstand airflow impacts and flight loads. This reduces the drone's energy consumption during flight, improving its endurance. The honeycomb hollow structure enhances the material's resistance to deformation, maintaining the morphological stability of the outer frame and lip, ensuring the stable operation of design functions such as air intake guidance, lift enhancement, and drag reduction. Furthermore, carbon fiber material has strong weather resistance, adapting to different flight environments, further improving the drone's durability and overall flight performance. In other embodiments, the drone frame and air intake lip 2 can also be made of glass fiber reinforced composite material or aramid fiber composite material.

[0046] Preferably, such as Figures 1-2 As shown, in this embodiment, four outer frame bodies 11 are provided. The four outer frame bodies 11 are equidistantly spaced and arranged around the outer periphery of the UAV body. The outer frame bodies 11 are curved surfaces, which allows airflow to be distributed more evenly around the UAV. The four outer frame bodies 11 can stably introduce airflow from different directions. The curved surface shape reduces the obstruction and turbulence when the airflow passes through, which not only enhances the stability of airflow introduction and the balance of lift during takeoff, but also further optimizes the smoothness of the outer frame surface during level flight, reduces the overall wind resistance, and improves the stability, aerodynamic efficiency, and adaptability of the UAV under different flight conditions. In other embodiments, three, five, or six outer frame bodies 11 may also be provided.

[0047] Preferably, such as Figures 1-2As shown, in this embodiment, the outer frame assembly 1 includes a first connector 13. The two ends of the first connector 13 are respectively connected to two adjacent outer frame bodies 11, which can integrate four independent outer frame bodies 11 into a stable overall structure, enhance the overall rigidity and structural strength of the outer frame assembly 1, prevent individual outer frame bodies 11 from shifting or deforming during airflow impact or flight turbulence, and make the outer frame layout around the UAV body more regular, reduce airflow turbulence between the outer frames, further optimize the smoothness of airflow through the outer frame assembly 1, ensure the stability of airflow introduction and lift enhancement during takeoff, and maintain the continuity of the outer frame surface shape during level flight to reduce drag, thereby improving the safety and structural reliability of UAV flight.

[0048] Preferably, such as Figures 1-2 As shown, in this embodiment, the first connector 13 is a slender cylindrical structure. The two ends of the first connector 13 are respectively inserted into two adjacent outer frame bodies 11. The slender shape of the first connector 13 minimizes its frontal area, avoiding excessive obstruction of airflow. The cylindrical shape of the outer surface makes it easier for airflow to slide along the surface, reducing turbulence. This ensures a stable connection to the four outer frame bodies 11 while reducing interference with the aerodynamic performance of the UAV, further adapting to the requirements of low drag and high stability under different flight conditions, and improving overall flight efficiency. The first connector 13 can also be a plate structure or a hinged structure, etc.

[0049] Preferably, in this embodiment, the outer frame assembly 1 further includes limiting clamps, which are installed on both sides of the outer frame body 11. Two limiting clamps are provided on each side of the outer frame body 11. The two limiting clamps are arranged at intervals in the vertical direction and limit and clamp the first connector 13. The two clamps arranged at intervals in the vertical direction on each side and clamping the first connector 13 can firmly connect the first connector 13 to the outer frame body 11, avoid relative displacement between the two in airflow impact or flight vibration, ensure the reliability of the connection structure, and at the same time, the vertically spaced clamping method can form a precise limit on the first connector 13, ensuring its positional stability, thereby maintaining the equidistant surrounding layout of the four outer frame bodies 11 and the regularity of the overall structure, reducing airflow turbulence caused by loose connection, which not only strengthens the structural strength and stability of the outer frame assembly 1, but also ensures the consistency of aerodynamic performance under different flight conditions, and improves the safety and adaptability of UAV flight.

[0050] Preferably, such as Figures 1-2As shown, in this embodiment, the guide vane 12 is a sheet-like structure that is thick in the middle and thin at both sides. This structure can reduce the overall weight of the vane and the additional load on the UAV while ensuring the structural strength of the vane itself to stably perform the opening and closing of the air inlet. The shape of being thick in the middle and thin at both sides conforms to the aerodynamic principle. When the vane is closed, it can make the outer frame surface fit the continuous and smooth shape more closely, further reducing the frictional resistance when the airflow passes through. When the vane is partially open, its streamlined structure can guide the airflow to pass through the air inlet more smoothly, reducing the turbulence generated by the airflow impact. This allows it to better meet the needs of adjusting the air intake volume and reducing the frontal area during the level flight phase, further improving the endurance and efficiency of the UAV during level flight. At the same time, when the vane is in a suitable opening and closing state during the takeoff phase, it can also help optimize the smoothness of the airflow entering the inner part of the outer frame. In conjunction with the design of the air intake lip 2, it can better take into account the performance optimization under different flight conditions.

[0051] Preferably, such as Figures 1-4 As shown, in this embodiment, the UAV frame also includes a rotating unit 3. The rotating unit 3 includes a rotating drive 31, a linkage component 32, and a first rotating shaft 33. The rotating drive 31 is mounted on the frame body 11. The linkage component 32 is spaced below the frame body 11 and is connected to the output end of the rotating drive 31. The first rotating shaft 33 is fixedly connected to the guide vane 12 and is connected to the linkage component 32. The linkage component 32 is used to drive the first rotating shaft 33 to rotate under the drive of the rotating component, precisely controlling the rotation of the guide vane 12 relative to the frame body 11, realizing the switching of the air inlet's closed and partially open states. It can flexibly adjust the guide vane 12 according to the needs during level flight to ensure the continuous and smooth surface shape of the frame to avoid turbulence, or adjust the air intake to reduce airflow impact, thereby effectively reducing flight resistance and adapting to the requirements of low resistance, high endurance, and high efficiency during level flight. This further improves the performance optimization capability and overall flight efficiency and adaptability of the UAV under different flight states.

[0052] Preferably, such as Figures 1-4As shown, in this embodiment, the linkage assembly 32 includes a bidirectional short connecting rod 321, a bidirectional long connecting rod 322, a second rotating shaft 323, a crank 324, and a first nut. One end of the bidirectional short connecting rod 321 is connected to the first rotating shaft 33, and the other end of the bidirectional short connecting rod 321 is rotatably connected to the first end of the bidirectional long connecting rod 322. The second rotating shaft 323 passes through both the bidirectional long connecting rod 322 and the bidirectional short connecting rod 321. One end of the crank 324 is connected to the rotation drive member 31, and the other end of the crank 324 passes through... The tail end of the bidirectional long connecting rod 322 is screwed to the first nut, which can stably transmit the power of the rotating drive component 31 to the first rotating shaft 33, precisely drive the guide vane 12 to rotate to adjust the air inlet state, realize the synchronous or coordinated action between the guide vanes 12, ensure the consistency of adjustment, and at the same time, the connection method of each component is stable and the transmission is efficient, which can precisely control the opening and closing angle of the guide vane 12, ensure flexible adaptation to different drag requirements during level flight, further improve the reliability and accuracy of the UAV frame adjustment, and optimize flight efficiency.

[0053] Preferably, such as Figures 1-4 As shown, in this embodiment, multiple guide vanes 12 are provided, arranged along the contour of the outer frame body 11. Multiple bidirectional long connecting rods 322, bidirectional short connecting rods 321, and second rotating shafts 323 are also provided. Adjacent bidirectional long connecting rods 322 are connected end-to-end. The second rotating shaft 323 passes through the head end of one of the adjacent bidirectional long connecting rods 322, the tail end of the other of the adjacent bidirectional long connecting rods 322, and one end of the bidirectional short connecting rod 321. The adjacent bidirectional long connecting rods 322 and the bidirectional short connecting rods 321 connected to them can rotate. The dynamic connection enables all guide vanes 12 to move synchronously under the drive of the rotating unit 3, that is, to simultaneously complete the switching between closed and partially open states, ensuring the consistency of the actions of each guide vane 12, making the opening and closing states of each air inlet uniform and consistent, avoiding airflow turbulence on the outer frame surface due to the adjustment difference of a single vane, ensuring the continuous and smooth shape of the outer frame surface during level flight to reduce drag. At the same time, the linkage structure of multiple components is stable and reliable, and can accurately respond to adjustment needs, further improving the drag control effect of the UAV outer frame during level flight and the stability of the overall flight performance. Meanwhile, the structure of multiple guide vanes 12 arranged along the contour of the outer frame body 11 and cooperating with multiple sets of linkage components 32 can better fit the contour curve of the outer frame body 11. By dividing the outer frame contour into multiple fitting segments, each guide vane 12 can be fitted to a local contour, achieving fine fitting of complex or irregular outer frame contours. This avoids problems such as incomplete closure, airflow leakage, or uneven surface caused by a single large-sized blade being difficult to fit completely with the air inlet due to the curvature of the outer frame contour. It ensures that all guide vanes 12 can be closely matched with the contour of the outer frame body 11 when opening and closing, so that the outer frame surface always remains continuous and smooth to reduce drag, while ensuring the accuracy of air intake adjustment, significantly improving the adaptability of the outer frame under different contour shapes and the stability of overall flight performance.

[0054] This embodiment also discloses a drone. In this embodiment, the drone includes a drone body and a drone frame. The drone body includes a drone fuselage and a propeller. The propeller is mounted on the drone fuselage, and the drone fuselage is mounted inside the drone frame. By mounting the drone fuselage inside the drone frame and the propeller on the drone fuselage, performance optimization can be achieved for different flight states. During takeoff, the outward folding design of the top of the air intake lip 2 on the outer frame expands the air intake area and creates an upward force in the airflow, increasing lift to meet the ground takeoff requirements. During level flight, by adjusting the opening and closing of the rotatable guide vanes 12 at the air intake of the outer frame, a smooth surface can be formed or the air intake volume can be adjusted, reducing the frontal area and air resistance, and improving endurance and efficiency. Its advantages are that it can improve the overall flight efficiency and adaptability of the drone, enhance flight stability, safety and durability, while reducing weight to reduce energy consumption.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An outer frame of a drone, characterized in that, include: The outer frame assembly (1) is disposed on the outer periphery of the UAV body. The outer frame assembly (1) includes an outer frame body (11) and a guide vane (12). An air inlet is provided on the outer frame body (11). The guide vane (12) is installed on the outer frame body (11) and is accommodated in the air inlet. The guide vane (12) is rotatably connected to the outer frame body (11) and can open and close the air inlet. Air intake lip (2) is connected to the upper part of the outer frame body (11), and the top of the air intake lip (2) is folded outward.

2. The drone outer frame of claim 1, wherein, The air intake lip (2) is an arc-shaped lip that folds from bottom to top and from the inside to the outside.

3. The drone outer frame of claim 1, wherein, The air intake lip (2) is glued to the outer frame body (11).

4. The drone outer frame of claim 1, wherein, The outer frame body (11) is provided in four parts, and the four outer frame bodies (11) are equidistant and surround the outer periphery of the UAV body. The outer frame body (11) is curved.

5. The UAV frame according to claim 4, characterized in that, The outer frame assembly (1) further includes a first connector (13), the two ends of which are respectively connected to two adjacent outer frame bodies (11).

6. The drone outer frame of claim 1, wherein, The guide vane (12) is a sheet-like structure that is thick in the middle and thin at both sides.

7. The outer frame of the drone according to any one of claims 1-6, wherein, The drone frame also includes a rotating unit (3), which includes: A rotation drive (31) is mounted on the outer frame body (11); Linkage components (32) are spaced apart below the outer frame body (11) and are connected to the output end of the rotation drive component (31). The first rotating shaft (33) is fixedly connected to the guide vane (12) and the first rotating shaft (33) is connected to the linkage component (32). The linkage component (32) is used to drive the first rotating shaft (33) to rotate under the drive of the rotation drive component (31), thereby realizing the rotation of the guide vane (12) relative to the outer frame body (11).

8. The drone outer frame of claim 7, wherein, The linkage component (32) includes: A bidirectional short link (321), one end of which is connected to the first rotating shaft (33); A bidirectional long connecting rod (322), wherein the opposite end of the bidirectional short connecting rod (321) is rotatably connected to the first end of the bidirectional long connecting rod (322); The second pivot (323) passes through both the bidirectional long connecting rod (322) and the bidirectional short connecting rod (321); A crank (324), one end of which is connected to the rotation drive (31); The first nut is screwed onto the opposite end of the crank (324) through the tail end of the bidirectional long connecting rod (322).

9. The drone outer frame of claim 8, wherein, Multiple guide vanes (12) are provided, and multiple guide vanes (12) are arranged along the outline of the outer frame body (11). Multiple bidirectional long connecting rods (322), multiple bidirectional short connecting rods (321), and multiple second rotating shafts (323) are provided. Two adjacent bidirectional long connecting rods (322) are connected end to end. The second rotating shaft (323) is simultaneously inserted through the first end of one of the two adjacent bidirectional long connecting rods (322), the tail end of the other of the two adjacent bidirectional long connecting rods (322), and one end of the bidirectional short connecting rod (321). Two adjacent bidirectional long connecting rods (322) and the bidirectional short connecting rods (321) connected to them can be rotatably connected.

10. A drone, characterized in that, The drone includes a drone body and a drone frame as described in any one of claims 1-9, wherein the drone body includes a drone fuselage and a propeller, the propeller being mounted on the drone fuselage and the drone fuselage being mounted within the drone frame.

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