A teardrop-shaped multi-rotor drone with laterally folding arms

Abstract

This invention discloses a teardrop-shaped multirotor drone with laterally foldable arms, belonging to the field of multirotor drone technology. It includes: a teardrop-shaped shell, multiple arm assemblies, a frame, a rotating support, a power unit, and a connector. The shell is designed in a teardrop shape to give the multirotor drone an overall teardrop shape. Multiple arm assemblies are evenly arranged on the teardrop-shaped shell in a planar manner. The frame secures the arm assemblies. The rotating support drives the arm assemblies to rotate. The power unit provides power for folding or unfolding the arms. The connector connects the rotating support and the arm assemblies to the frame, so that the rotating support rotates synchronously with the power unit, allowing the arms to fold or unfold towards or away from the teardrop-shaped shell. This multirotor drone's arms can automatically unfold or fold, facilitating transportation, reducing storage space, and lowering storage and transportation costs.

Description

Technical Field

[0001] This invention relates to the field of multi-rotor drone technology, and more particularly to a teardrop-shaped multi-rotor drone with laterally foldable arms. Background Technology

[0002] A multi-rotor drone is a special type of unmanned rotary-wing aircraft with three or more rotor shafts. Its flight principle involves the electric motor at the end of each rotor shaft rotating simultaneously, driving the rotors to rotate synchronously and generating upward lift, thus propelling the multi-rotor drone into flight. As is well known, the torque of the thrust can be altered by changing the relative speeds between the different rotors, thereby controlling the aircraft's trajectory.

[0003] Existing multi-rotor drones have fixed rotor angles, unlike helicopters which can be adjusted during flight. This results in non-adjustable wheelbases for multi-rotor drones, limiting their operation in confined spaces. Consequently, different operational needs can only be met by carrying multiple multi-rotor drones of different specifications. However, transporting multiple multi-rotor drones increases transportation costs and makes transportation more difficult compared to transporting a single multi-rotor drone. Summary of the Invention

[0004] To address some or all of the technical problems existing in the prior art, the present invention provides a teardrop-shaped multi-rotor drone with laterally foldable arms. The arms can automatically unfold or fold laterally, facilitating transportation, reducing storage space and transportation costs, and ensuring the safety of the arms and rotors.

[0005] The technical solution of the present invention is as follows: A teardrop-shaped multirotor drone with laterally foldable arms is provided, comprising: The multi-rotor drone has a teardrop-shaped outer shell and multiple parallel cabins inside the teardrop-shaped outer shell. The power components, flight control components and data transmission components of the drone are respectively arranged inside the multiple parallel cabins, so that the multi-rotor drone is teardrop-shaped as a whole. Multiple robotic arm assemblies are evenly arranged on a teardrop-shaped shell in the form of the same plane, and the multiple robotic arm assemblies can rotate synchronously counterclockwise or clockwise around the center of the teardrop-shaped shell; A partition frame, which is detachably disposed within the teardrop-shaped housing, is used to fix multiple of the arm assemblies; A rotating support member is disposed above the partition frame and is used to drive the multiple arm assemblies to rotate. A power component is disposed above the rotating support component and is used to provide power for folding or unfolding the arm; A connector is disposed at one end of the plurality of robotic arm assemblies and is used to connect the rotating support and the plurality of robotic arm assemblies to the partition frame, so that when the power component rotates, it can drive the rotating support to rotate synchronously, and also enable the plurality of robotic arm assemblies to rotate around the connector, so that the robotic arms in the robotic arm assemblies can be folded or unfolded in a manner that is close to or away from the teardrop-shaped shell.

[0006] Furthermore, in the aforementioned teardrop-shaped multirotor UAV with laterally foldable arms, the arm assembly includes: The main arm has one end rotatably connected to the partition frame, and the other end is used to set the rotor of the multi-rotor UAV. The main arm is configured as an arc-shaped structure, with the concave side of the arc-shaped structure facing the teardrop-shaped outer shell. A secondary arm, one end of which is rotatably connected to the rotating support, and the other end of which is hinged to the main arm.

[0007] Furthermore, in the aforementioned teardrop-shaped multi-rotor UAV with laterally foldable arms, a preset track is provided on the frame.

[0008] Furthermore, in the aforementioned teardrop-shaped multi-rotor UAV with laterally foldable arms, the rotating support includes: A central rotating part, which is fixedly connected to the power component; The arm rotating part is integrally formed with the central rotating part so that the power component can drive the central rotating part and the arm rotating part to rotate synchronously during the rotation process. The number of arm rotating parts is set to multiple, and the multiple arm rotating parts are evenly arranged on the outer periphery of the central rotating part. One end of the auxiliary arm is rotatably connected to the arm rotating part.

[0009] Furthermore, in the aforementioned teardrop-shaped multirotor UAV with laterally foldable arms, the number of rotating parts of the arms is determined according to the number of arm components of the multirotor UAV.

[0010] Furthermore, in the aforementioned teardrop-shaped multirotor UAV with laterally foldable arms, the connecting member includes: The first connector passes through the preset track on the partition frame and is rotatably connected to one end of the rotating support and the auxiliary arm, respectively. The second connector is rotatably connected to one end of the main arm and the partition frame, respectively.

[0011] Furthermore, in the aforementioned teardrop-shaped multirotor UAV with laterally foldable arms, the first connector and the second connector are rotation axes.

[0012] Furthermore, in the aforementioned teardrop-shaped multirotor UAV with laterally foldable arms, a sliding area for folding the main arm and the auxiliary arm is provided on the teardrop-shaped shell.

[0013] Furthermore, in the aforementioned teardrop-shaped multi-rotor UAV with a laterally foldable arm, the rotor of the multi-rotor UAV on the main arm is positioned downwards.

[0014] Furthermore, in the aforementioned teardrop-shaped multi-rotor drone with laterally foldable arms, the partition is located in the middle of the teardrop-shaped shell, so that the drone's rotor is in the center of the drone.

[0015] The main advantages of the technical solution of this invention are as follows: This invention discloses a teardrop-shaped multi-rotor drone with laterally foldable arms. By setting the drone's outer shell in a teardrop shape and arranging the drone's components inside the teardrop-shaped shell, the overall shape of the drone is teardrop-shaped, thereby reducing flight drag and improving endurance and flight stability. By designing the arms to be laterally foldable and arranging multiple arm components evenly on the teardrop-shaped shell in a plane, the multiple arm components can rotate synchronously counterclockwise or clockwise around the center of the teardrop-shaped shell. This allows the arms in the arm components to fold or unfold in a manner that is close to or away from the teardrop-shaped shell, thereby allowing the length of the arms to be varied. This facilitates transportation, reduces storage space, lowers storage and transportation costs, and ensures the safety of the arms and rotors. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and constitute a part of this invention, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a teardrop-shaped multi-rotor UAV with laterally foldable arms, provided as an embodiment of the present invention, wherein the teardrop-shaped shell is shown in half section. Figure 2 This is a schematic diagram of the structure of a teardrop-shaped multirotor UAV with a laterally foldable arm, provided as an embodiment of the present invention, wherein the teardrop-shaped outer shell is shown in half section. Figure 3 This is a schematic diagram of the unfolded arm of a teardrop-shaped multi-rotor UAV with a laterally foldable arm, provided as an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Teardrop-shaped outer shell; 11. Sliding area; 2. Arm assembly; 21. Main arm; 22. Auxiliary arm; 3. Frame; 31. Preset track; 4. Rotating support component; 41. Central rotating part; 42. Arm rotating part; 5. Power components; 61. First connector. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0019] The following is in conjunction with the appendix Figure 1-3 The technical solutions provided in the embodiments of the present invention will be described in detail.

[0020] As attached Figure 1-3 As shown, this embodiment of the invention provides a teardrop-shaped multirotor drone with laterally foldable arms. The teardrop-shaped multirotor drone includes: a teardrop-shaped shell 1, multiple arm assemblies 2, a frame 3, a rotating support 4, a power unit 5, and connecting components, wherein: Multiple parallel cabins are arranged inside the teardrop-shaped outer shell 1. The power unit, flight control unit, and data transmission unit of the UAV are respectively housed within each of these cabins, giving the multi-rotor UAV an overall teardrop shape. Multiple arm assemblies 2 are evenly arranged on the teardrop-shaped outer shell 1 in a plane, and can rotate synchronously counterclockwise or clockwise around the center of the teardrop-shaped outer shell 1. A partition frame 3 is detachably installed inside the teardrop-shaped outer shell 1 and is used to fix the multiple arm assemblies 2. A rotating support 4 is installed within the partition frame 3. Above, a rotating support 4 is used to drive multiple robotic arm assemblies 2 to rotate; a power component 5 is located above the rotating support 4 and is used to provide power for the folding or unfolding of the robotic arms; a connector is located at one end of multiple robotic arm assemblies 2 and is used to connect the rotating support 4 and multiple robotic arm assemblies 2 to the partition frame 3 so that when the power component 5 rotates, it can drive the rotating support 4 to rotate synchronously, and also enable multiple robotic arm assemblies 2 to rotate around the connector, so that the robotic arms in the robotic arm assembly 2 can be folded or unfolded in a manner that is close to or away from the teardrop-shaped outer shell 1.

[0021] Therefore, the present invention provides a teardrop-shaped multi-rotor drone with laterally foldable arms. By setting the drone's outer shell to a teardrop shape and arranging the drone's components inside the teardrop-shaped outer shell 1, the overall shape of the drone is teardrop-shaped, thereby reducing flight drag and improving endurance and flight stability. By designing the arms to be laterally foldable and arranging multiple arm components 2 evenly on the teardrop-shaped outer shell 1 in the same plane, the multiple arm components 2 can rotate synchronously counterclockwise or clockwise around the center of the teardrop-shaped outer shell 1, allowing the arms in the arm components 2 to fold or unfold in a manner that is close to or away from the teardrop-shaped outer shell 1. This allows the length of the arms to be varied, thus facilitating transportation, reducing storage space, lowering storage and transportation costs, and ensuring the safety of the arms and rotors.

[0022] In this embodiment of the invention, the purpose of setting the outer shell of the multi-rotor drone to a teardrop shape is: Because of its streamlined structure, similar to that of fish or birds, the teardrop shape is one of the shapes with the least fluid resistance in nature. It can significantly reduce air resistance during flight, especially under high-speed flight or headwind conditions. Low resistance directly reduces energy loss. Actual flight verification has shown that it can extend battery life by 10%-20%, making it suitable for long-distance inspection, logistics transportation and other scenarios. In addition, the teardrop-shaped shell can reduce turbulence and vortices, avoid shaking caused by airflow separation, and improve high-speed flight stability.

[0023] In this embodiment of the invention, the teardrop-shaped shell 1 can be manufactured using integrated molding technology, such as carbon fiber composite materials or 3D printing. The arc-shaped structure of the teardrop-shaped shell 1 naturally possesses compressive strength, dispersing external stress and enhancing wind resistance and collision protection. The teardrop shape also reduces the impact of crosswinds, making it suitable for operation in complex weather conditions. The teardrop-shaped shell 1 is easier to seal, and in practical applications, the addition of a hydrophobic coating can improve reliability in rainy or dusty environments. Furthermore, the arc-shaped structure of the teardrop-shaped shell 1 can also enclose components of multi-rotor drones, reducing the risk of impacts and preventing falls or foreign object intrusion.

[0024] In summary, its low-power flight aligns with the green energy trend and can also reduce the frequency of battery replacements, thereby lowering long-term operating costs.

[0025] Understandably, the size of the teardrop-shaped shell 1 is set according to actual needs. During use, except for the arms and the rotors set on the arms, which are set on the outside of the teardrop-shaped shell 1, the other essential components of the multi-rotor drone are set inside the teardrop-shaped shell 1 or set to be flush with the outer surface of the teardrop-shaped shell 1. This allows the multi-rotor drone to present an overall teardrop shape, giving it the advantages of a teardrop structure.

[0026] For example, a gimbal, including a camera, is installed in the top compartment of the teardrop-shaped shell 1 for exploration and detection; payload equipment and flight control equipment, such as flight control components and data transmission components, are installed in the middle compartment; and a power module, such as a lithium battery, is installed in the bottom compartment to provide power to the entire drone.

[0027] For example, scenarios in which the teardrop-shaped multi-rotor UAV of the present invention is used for operations include at least the following: Logistics and transportation, such as long-range and wind-resistant express delivery to areas such as mountainous regions or across the sea; Inspection and monitoring, such as efficient inspection of power grids and oil and gas pipelines, with low noise to avoid disturbing wild animals; Emergency rescue, such as: material delivery or search and rescue missions in severe weather; Military reconnaissance, for example: coating the teardrop-shaped shell 1 with stealth materials to give the multi-rotor UAV a low radar cross-section, thereby improving its stealth.

[0028] To make the teardrop-shaped multi-rotor drone fly more smoothly, the partition 3 is placed in the middle of the teardrop-shaped shell 1 so that the drone's rotor is in the center of the drone.

[0029] Furthermore, such as Figure 1 As shown, in this embodiment of the invention, the robotic arm assembly 2 includes: a main robotic arm 21 and a secondary robotic arm 22, wherein: One end of the main arm 21 is rotatably connected to the partition 3, and the other end of the main arm 21 is used to set the rotor of the multi-rotor UAV. The main arm 21 is set as an arc-shaped structure, with the concave side of the arc-shaped structure facing the teardrop-shaped shell 1. One end of the auxiliary arm 22 is rotatably connected to the rotating support 4, and the other end of the auxiliary arm 22 is hinged to the main arm 21.

[0030] With this configuration, during the unfolding and folding of the robotic arm, the power unit 5 applies power to drive the rotating support 4 to rotate. The rotation of the rotating support 4 causes one end of the auxiliary robotic arm 22 to rotate. During the rotation, the other end of the auxiliary robotic arm 22 can drive the main robotic arm 21 to rotate. Specifically, when the power unit 5 drives the rotating support 4 to rotate counterclockwise, the other end of the auxiliary robotic arm 22 can drive the other end of the main robotic arm 21 to move closer to the teardrop-shaped outer shell 1, thereby realizing the folding of the robotic arm assembly 2. When the power unit 5 drives the rotating support 4 to rotate clockwise, the other end of the auxiliary robotic arm 22 can drive the other end of the main robotic arm 21 to move away from the teardrop-shaped outer shell 1, thereby realizing the unfolding of the robotic arm assembly 2. This makes the folding and unfolding of the robotic arm more reliable and efficient.

[0031] In addition, by setting the main arm 21 as an arc-shaped structure, it can be maximized during unfolding and folding, while also reducing the space occupied by the arm after folding, thereby reducing the space occupied by the multi-rotor drone.

[0032] For example, the main arm 21 adopts an X-shaped layout.

[0033] In order to facilitate the rotation of the auxiliary arm 22 by the power component 5 to realize the unfolding and folding of the arm, a preset track 31 is provided on the partition frame 3.

[0034] For example, the preset track 31 is set as an arc track, and the arc radius and arc length of the arc track are determined according to the rotation radius and rotation length of the power component 5.

[0035] In some optional implementations of this embodiment, the power component 5 is set as a servo motor.

[0036] Further, see Figure 1 In this embodiment of the invention, the rotating support 4 includes: a central rotating part 41 and a machine arm rotating part 42, wherein: The central rotating part 41 is fixedly connected to the power component 5; the arm rotating part 42 is integrally formed with the central rotating part 41 so that the power component 5 can drive the central rotating part 41 and the arm rotating part 42 to rotate synchronously during the rotation process. The number of arm rotating parts 42 is set to multiple, and the multiple arm rotating parts 42 are evenly arranged on the outer periphery of the central rotating part 41. One end of the auxiliary arm 22 is rotatably connected to the arm rotating part 42.

[0037] This configuration, which integrates the central rotating part 41 and the arm rotating part 42 into a single structure, ensures the strength of the rotating support 4 and guarantees the flight stability of the multi-rotor UAV.

[0038] In some optional implementations of this embodiment, the rotating support 4 is configured as a plate-like structure.

[0039] For example, such as Figure 1 As shown, the central rotating part 41 of the rotating support 4 is set as a circular structure, and the arm rotating part 42 is set as a rectangular structure, and the two are integrally formed.

[0040] In this embodiment of the invention, the number of arm rotating parts 42 is determined according to the number of arm components of the multi-rotor UAV.

[0041] With this configuration, the arm rotating part 42 can serve as an identifier and positioning element, avoiding confusion during the connection of the rotating support 4 and the auxiliary arm 22, thus improving assembly efficiency. Furthermore, the number of arm rotating parts 42 can be set according to the number of rotors of the multi-rotor drone, ensuring accurate connection to the corresponding number of auxiliary arms 22. In addition, the integral molding of the central rotating part 41 and the arm rotating part 42 avoids complex connection and fixing structures between them. Therefore, by reducing or matching the number of rotating support 4, the overall weight of the multi-rotor drone can be reduced.

[0042] For example, the rotating support 4 is made of carbon fiber sheet, which can ensure the strength of the rotating support 4 while also reducing its weight.

[0043] Furthermore, such as Figure 1 As shown, in this embodiment of the invention, the connector includes: a first connector 61 and a second connector, wherein: The first connector 61 passes through the preset track 31 on the partition 3 and is rotatably connected to one end of the rotating support 4 and the auxiliary arm 22 respectively; the second connector is rotatably connected to one end of the main arm 21 and the partition 3 respectively.

[0044] This configuration enables the rotatable connection between the rotating support 4 and the auxiliary arm 22, as well as the rotatable connection between the main arm 21 and the partition frame 3, simplifying the transmission structure.

[0045] As an example, both the first connector 61 and the second connector are configured as optical axes, or both the first connector 61 and the second connector are configured as rotation axes.

[0046] As another example, the first connector 61 is configured as either an optical axis or a rotary axis, and the second connector is configured as either an optical axis or a rotary axis.

[0047] In order for the first connector 61 to reliably and effectively connect the auxiliary arm 22 to the rotating support 4, the length of the first connector 61 is set to be greater than the sum of the thicknesses of the auxiliary arm 22, the partition 3, and the rotating support 4.

[0048] In order to avoid collision and interference between the main arm 21 and the auxiliary arm 22 and the teardrop-shaped shell 1 during the folding or unfolding process driven by the power component 5, a sliding area 11 for folding the main arm 21 and the auxiliary arm 22 is provided on the teardrop-shaped shell 1.

[0049] For example, the sliding area 11 is set as a rectangular or arc-shaped opening, the direction of which is along the sliding direction of the main arm 21 and the auxiliary arm 22, and the size of the opening is determined according to the extension length and extension range of the main arm 21 and the auxiliary arm 22.

[0050] In order to lower the center of gravity of the teardrop-shaped multi-rotor drone and improve its agility during high-speed flight, the rotors on the main arm 21 are set downwards.

[0051] In summary, the folding and unfolding principle of the arm assembly 2 in the teardrop-shaped multirotor UAV with laterally foldable arms according to embodiments of the present invention includes: When the arm assembly 2 needs to be folded, the power component 5 drives the rotating support component 4 to rotate counterclockwise. The counterclockwise rotation of the rotating support component 4 can drive one end of the auxiliary arm 22 to rotate counterclockwise. During the counterclockwise rotation of one end of the auxiliary arm 22, the other end of the auxiliary arm 22 drives the main arm 21, which is hinged to it, to rotate. The other end of the main arm 21 moves towards the teardrop-shaped outer shell 1 under the drive of the other end of the auxiliary arm 22. One end of the main arm 21 rotates around the second connecting member, thereby realizing the folding of the arm assembly 2.

[0052] When the arm assembly 2 needs to be deployed, the power component 5 drives the rotating support component 4 to rotate clockwise. The clockwise rotation of the rotating support component 4 can drive one end of the auxiliary arm 22 to rotate clockwise. During the clockwise rotation of one end of the auxiliary arm 22, the other end of the auxiliary arm 22 drives the main arm 21, which is hinged to it, to rotate. The other end of the main arm 21 moves away from the teardrop-shaped outer shell 1 under the drive of the other end of the auxiliary arm 22. One end of the main arm 21 rotates around the second connecting member, thereby realizing the deployment of the arm assembly 2.

[0053] Furthermore, in some optional implementations of the present invention, in order to avoid interference between the main arm 21 and the auxiliary arm 22, and interference between the arm assembly 2 and other components on the teardrop-shaped multi-rotor UAV during the unfolding and folding process, one end of the main arm 21 connected to the partition 3 and / or one end of the auxiliary arm 22 connected to the rotating support 4 are set as an arc-shaped structure or a bent structure.

[0054] For example, the folding of the main arm 21 and the auxiliary arm 22 in the arm assembly 2 is controlled by a flight controller, which controls the folding and unfolding of the arms through controls on a remote controller paired with it.

[0055] In summary, the present invention provides a teardrop-shaped multi-rotor drone with laterally foldable arms. The arms can automatically unfold or fold laterally, thus facilitating transportation, reducing storage space, lowering storage and transportation costs, and ensuring the safety of the arms and rotors.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, the terms "front," "back," "left," "right," "upper," and "lower" in this document refer to the placement shown in the accompanying drawings.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water-drop type multi-rotor unmanned aerial vehicle whose arms are laterally foldable, characterized in that, include: The multi-rotor drone has a teardrop-shaped outer shell and multiple parallel cabins inside the teardrop-shaped outer shell. The power components, flight control components and data transmission components of the drone are respectively arranged inside the multiple parallel cabins, so that the multi-rotor drone is teardrop-shaped as a whole. Multiple robotic arm assemblies are evenly arranged on a teardrop-shaped shell in the form of the same plane, and the multiple robotic arm assemblies can rotate synchronously counterclockwise or clockwise around the center of the teardrop-shaped shell; A partition frame, which is detachably disposed within the teardrop-shaped housing, is used to fix multiple of the arm assemblies; A rotating support member is disposed above the partition frame and is used to drive the multiple arm assemblies to rotate. A power component is disposed above the rotating support component and is used to provide power for folding or unfolding the arm; A connector is disposed at one end of the plurality of robotic arm assemblies and is used to connect the rotating support and the plurality of robotic arm assemblies to the partition frame, so that when the power component rotates, it can drive the rotating support to rotate synchronously, and also enable the plurality of robotic arm assemblies to rotate around the connector, so that the robotic arms in the robotic arm assemblies can be folded or unfolded in a manner that is close to or away from the teardrop-shaped shell.

2. The water-drop type multi-rotor unmanned aerial vehicle with laterally foldable arms according to claim 1, characterized in that, The robotic arm assembly includes: The main arm has one end rotatably connected to the partition frame, and the other end is used to set the rotor of the multi-rotor UAV. The main arm is configured as an arc-shaped structure, with the concave side of the arc-shaped structure facing the teardrop-shaped outer shell. A secondary arm, one end of which is rotatably connected to the rotating support, and the other end of which is hinged to the main arm.

3. The water-drop type multi-rotor unmanned aerial vehicle with laterally foldable arms according to claim 2, characterized in that, A preset track is provided on the partition frame.

4. The water-drop type multi-rotor unmanned aerial vehicle with laterally foldable arms according to claim 3, characterized in that, The rotating support includes: A central rotating part, which is fixedly connected to the power component; The arm rotating part is integrally formed with the central rotating part so that the power component can drive the central rotating part and the arm rotating part to rotate synchronously during the rotation process. The number of arm rotating parts is set to multiple, and the multiple arm rotating parts are evenly arranged on the outer periphery of the central rotating part. One end of the auxiliary arm is rotatably connected to the arm rotating part.

5. The water-drop type multi-rotor unmanned aerial vehicle with laterally foldable arms according to claim 4, characterized in that, The number of rotating parts of the arm is determined based on the number of arm components of the multi-rotor UAV.

6. The water-drop type multi-rotor unmanned aerial vehicle with laterally foldable arms according to claim 5, characterized in that, The connector includes: The first connector passes through the preset track on the partition frame and is rotatably connected to one end of the rotating support and the auxiliary arm, respectively. The second connector is rotatably connected to one end of the main arm and the partition frame, respectively.

7. A teardrop-shaped multi-rotor UAV with laterally foldable arms according to claim 6, characterized in that, The first connector and the second connector are rotating shafts.

8. A teardrop-shaped multi-rotor UAV with laterally foldable arms according to claim 2, characterized in that, The teardrop-shaped outer shell has a sliding area for folding the main arm and the auxiliary arm.

9. A teardrop-shaped multi-rotor UAV with laterally foldable arms according to claim 2, characterized in that, The rotors of the multi-rotor UAV on the main arm are set downwards.

10. A teardrop-shaped multi-rotor UAV with laterally foldable arms according to claim 1, characterized in that, The partition is located in the middle of the teardrop-shaped shell so that the drone's rotor is in the center of the drone.

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