Unmanned aerial vehicle arm folding device

Abstract

The utility model relates to the field of unmanned aerial vehicle arm equipment, and discloses an unmanned aerial vehicle arm folding device which comprises an unmanned aerial vehicle body, storage grooves are formed in the left side and the right side of the unmanned aerial vehicle body respectively, first connecting arms are arranged in the four storage grooves respectively, and a first connecting plate is rotationally connected into the other side of each first connecting arm; a second connecting arm is rotationally connected to the interior of the other side of each first connecting plate, and fixing mechanisms are arranged in the four first connecting plates and the second connecting arms; the four fixing mechanisms comprise four first device boxes. By means of the fixing mechanism, the problems that an unmanned aerial vehicle is difficult to store in order, cracks, deformation and other damage conditions occur can be solved, the first supporting plate is pressed by the inserting buckles and overcomes the elasticity of the two sets of springs to move downwards, and therefore the folded vehicle arms are effectively fixed and supported, damage caused by collision is reduced, and the working efficiency of the unmanned aerial vehicle is improved. And the maintenance cost and frequency are reduced.

Description

Drone arm folding device Technical Field

[0001] This utility model relates to the field of drone arm equipment, and in particular to a drone arm folding device. Background Technology

[0002] Background of the device.

[0003] When retracting the drone's arms, the folded arms may unfold again due to external factors such as bumps and swaying. This increases the space occupied by the drone, making it difficult to store neatly, and can damage the arms, affecting the drone's lifespan and causing cracks, deformation, and other damage. When replacing the arms or performing repairs, the lack of a quick-release mechanism may require replacing the entire drone fuselage, not just the arms. Traditional connection methods can tightly integrate the arms with the fuselage, making them difficult to disassemble separately, increasing repair costs, significantly extending repair time, prolonging the entire debugging cycle, and affecting the drone's readiness for deployment. Summary of the Invention

[0004] The main purpose of this utility model is to provide a drone arm folding device, which can effectively solve the problems that make it difficult to store drones neatly, leading to arm damage, affecting the service life of drones, causing cracks, deformation and other damage, increasing maintenance costs, greatly increasing maintenance time, extending the entire debugging cycle, and affecting the time before drones can be put into use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a drone arm folding device, comprising a drone body, with storage slots on both the left and right sides of the drone body, and a first connecting arm disposed inside each of the four storage slots. A first connecting plate is rotatably connected to the other side of each first connecting arm, and a second connecting arm is rotatably connected to the other side of each first connecting plate. Fixing mechanisms are disposed inside the four first connecting plates and the four second connecting arms. The four fixing mechanisms include: four first device boxes, eight locking devices, and four second device boxes. The outer sides of the four first device boxes are fixedly connected to the front sidewalls of the four first connecting arms. A first inclined block is fixedly connected to the top wall of the inner side of each first device box. A first connecting rod is fixedly connected to the inner side of each first inclined block. The eight locking devices are rotatably connected to the outer sides of the left and right ends of the four first connecting rods. A limiting rod is fixedly connected to the inner side of each first inclined block. Each limiting rod is disposed at the rear bottom of two locking devices. The outer sides of the four second device boxes are fixedly connected to the front sidewalls of the second connecting arms. A first support plate is disposed inside the inner side of each second device box.

[0006] Furthermore, each of the first support plates has two first springs fixedly connected to its bottom wall, the bottom ends of each pair of first springs are fixedly connected to the inner bottom wall of a second device box, and each of the first support plates has two second springs fixedly connected to its top wall. Each of the second device boxes has a top plate inside, and the top ends of each pair of second springs are fixedly connected to the bottom wall of a top plate.

[0007] Furthermore, a button is fixedly connected to the top of each of the top plates, and the outer side of each button extends through the top of the second device box and the second connecting arm. A second inclined block is fixedly connected to the front side wall of each of the first support plates, and a buckle is fixedly connected to the front side wall of each of the second inclined blocks. Each buckle and the locking device are correspondingly set.

[0008] Furthermore, a limiting plate is fixedly connected to the left side of each of the two left second connecting arms and the rear right side of each of the two right second connecting arms. The left side of the multiple limiting plates is disposed on the rear sidewall of the first connecting plate. A second connecting plate is rotatably connected to the interior of each of the left side of the two left second connecting arms and the right side of each of the two right second connecting arms. A second support plate is fixedly connected to the right sidewall of each second connecting plate. A rotator is fixedly connected to the top of each second support plate. A wing is rotatably connected to the top of each rotator.

[0009] Furthermore, a second connecting rod is rotatably connected to the inside of the right side of the two left first connecting arms and the left side of the two right first connecting arms. A first connecting block is rotatably connected to the outside of the bottom end of each second connecting rod, and a buckle is fixedly connected to the other side of each of the four first connecting blocks.

[0010] Furthermore, each of the storage slots has mounting slots on both the upper and lower sides, and a shell is fixedly connected to the slots on both the left and right sides of the drone body. Each shell has a placement slot at its bottom, and a support rod is slidably connected inside each shell. The top of each support rod is connected through to the top wall of the drone body.

[0011] Furthermore, each of the support rods is fixedly connected to a second connecting block on both the front and rear sides, and each of the second connecting blocks is fixedly connected to two elastic bodies on its bottom wall. The bottom walls of every four elastic bodies are fixedly connected to the internal slots of the outer shell, and each support rod is fixedly connected to a locking block at its bottom.

[0012] Furthermore, each of the buckles is disposed inside the placement groove, the top hole of the buckle is correspondingly disposed to the buckle block, and the upper and lower ends of each of the second connecting rods are disposed inside the mounting groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model, through its fixed mechanism, solves the problems of drones being difficult to store neatly, leading to arm damage, reduced drone lifespan, and cracks, deformation, and other damage. The first support plate, under the pressure of the buckle, overcomes the spring force of the two sets of springs and moves downwards. The first spring is compressed between the first support plate and the bottom wall of the second device box, acting as a buffer and providing support and reset. Simultaneously, the top plate moves downwards with the first support plate under the linkage of the second spring. When the buckle passes the second inclined block, the first support plate rebounds under the reaction force of the spring, causing the buckle to fit tightly against the second inclined block. Furthermore, pressing the button can trigger the unlocking process again, ensuring reliable arm fixation. This effectively improves the fixation and support of folded arms, reduces damage from collisions, and lowers maintenance costs and frequency.

[0015] 2. By incorporating a second connecting rod, buckle, placement slot, second connecting block, elastic body, and locking block, the system effectively addresses the issues that increase maintenance costs, significantly extend maintenance time, prolong the entire debugging cycle, and affect the time it takes for the drone to be put into use. This is achieved by pushing the support rod downwards along the through-channel. This downward movement causes the locking block at the bottom of the support rod to disengage from the top hole slot of the buckle, breaking the vertical lock and completing the first step of unlocking. As the locking block is removed, the buckle in the placement slot is freed from its vertical constraint, gaining a degree of freedom of movement, laying the foundation for subsequent disassembly. Simultaneously, the downward movement of the support rod transmits minute deformations and stress changes to the surrounding structure through mechanical connections, thereby effectively shortening maintenance time, reducing the risk of mission interruption due to equipment failure, reducing the overall space occupied by the drone, and improving portability.

[0016] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0017] Figure 1 is a three-dimensional structural diagram of the UAV arm folding device proposed in this utility model;

[0018] Figure 2 is a schematic diagram of the unfolded arm of the UAV arm folding device proposed in this utility model;

[0019] Figure 3 is a structural diagram of the first connecting arm of the UAV arm folding device proposed in this utility model.

[0020] Figure 4 is a structural diagram of the first inclined block of the UAV arm folding device proposed in this utility model.

[0021] Figure 5 is a cross-sectional view of the internal structure of the first device box of the UAV arm folding device proposed in this utility model.

[0022] Figure 6 is a structural diagram of the second device box of the UAV arm folding device proposed in this utility model;

[0023] Figure 7 is a cross-sectional view of the interior of the second device box of the UAV arm folding device proposed in this utility model.

[0024] Figure 8 is a schematic diagram of the connection between the buckle and the locking device of the UAV arm folding device proposed in this utility model.

[0025] Figure 9 is a structural diagram of the mounting groove of the UAV arm folding device proposed in this utility model;

[0026] Figure 10 is a diagram of the buckle structure of the UAV arm folding device proposed in this utility model;

[0027] Figure 11 is a structural diagram of the storage slot of the drone arm folding device proposed in this utility model;

[0028] Figure 12 is a structural diagram of the second connecting block of the UAV arm folding device proposed in this utility model;

[0029] Figure 13 is a block structure diagram of the UAV arm folding device proposed in this utility model.

[0030] Legend:

[0031] 1. Drone body; 2. First connecting arm; 3. Fixing mechanism; 301. First device box; 302. First inclined block; 303. First connecting rod; 304. Positioner; 305. Limiting rod; 306. Second device box; 307. First support plate; 308. First spring; 309. Second spring; 310. Top plate; 311. Button; 312. Second inclined block; 313. Buckle; 4. First connecting plate; 5. Second connecting arm; 6. Storage slot; 7. Limiting plate; 8. Second connecting plate; 9. Second support plate; 10. Rotator; 11. Wing; 12. Second connecting rod; 13. First connecting block; 14. Buckle; 15. Mounting slot; 16. Outer shell; 17. Placement slot; 18. Support rod; 19. Second connecting block; 20. Elastomer; 21. Locking block. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0033] As shown in Figures 1-5: A drone arm folding device includes a drone body 1. The device is characterized by: storage slots 6 on both the left and right sides of the drone body 1; each of the four storage slots 6 houses a first connecting arm 2, which is stored inside the drone body 1. A first connecting plate 4 is rotatably connected to the other side of each first connecting arm 2, and a second connecting arm 5 is rotatably connected to the other side of each first connecting plate 4. The first connecting plate 4 on the other side of the first connecting arm 2 rotatably connects with the interior of the second connecting arm 5, achieving a folding effect by connecting the support structure.

[0034] The four first connecting plates 4 and the second connecting arms 5 are equipped with fixing mechanisms 3. The four fixing mechanisms 3 include: four first device boxes 301, eight locking devices 304 and four second device boxes 306. The outer sides of the four first device boxes 301 are fixedly connected to the inner front sidewalls of the four first connecting arms 2. The inner top wall of each first device box 301 is fixedly connected to a first inclined block 302. The inner side of each first inclined block 302 is fixedly connected to a first connecting rod 303. The first device boxes 301 are used to protect the inner devices from the outside, and the first connecting rods 303 inside the first inclined blocks 302 are used to support and fix the outer devices.

[0035] Eight locking devices 304 are rotatably connected to the outer sides of the left and right ends of the four first connecting rods 303. Each first inclined block 302 has a fixed limiting rod 305 inside, and each limiting rod 305 is located at the rear bottom of two locking devices 304. These locking devices 304 connect to the devices inside the second device box 306, securing the first connecting arm 2 and the second connecting arm 5 during folding. The outer sides of the four second device boxes 306 are fixedly connected to the inner front wall of the second connecting arm 5. Each second device box 306 has a first support plate 307 inside, supporting and securing the internal devices.

[0036] As shown in Figures 1-8, each first support plate 307 has two first springs 308 fixedly connected to its bottom wall. The bottom ends of every two first springs 308 are fixedly connected to the inner bottom wall of a second device box 306. Each first support plate 307 has two second springs 309 fixedly connected to its top wall. Each second device box 306 has a top plate 310 inside. The top ends of every two second springs 309 are fixedly connected to the bottom wall of a top plate 310. The first springs 308 at the bottom of the first support plate 307 are fixed to the inner bottom wall of the second device box 306 to support and fix the top first support plate 307. In addition, the second springs 309 at the top of the first support plate 307 are connected to the top plate 310. When the top plate 310 is pressed, the first support plate 307 is supported by the first springs 308 and the second springs 309, and the plate rebounds and resets.

[0037] Each top plate 310 is fixedly connected to a button 311. The outer side of each button 311 extends through the top of the second device box 306 and the second connecting arm 5. A second inclined block 312 is fixedly connected to the front side wall of each first support plate 307. A buckle 313 is fixedly connected to the front side wall of each second inclined block 312. Each buckle 313 is correspondingly set with a locking device 304. When the user manually pushes the second connecting arm 5 to fold the arm, this external force causes the first connecting plate 4 to rotate around its rotational connection point with the first connecting arm 2, causing the second connecting arm 5 to bend towards the storage slot 6. As the bending action proceeds, the buckle 313 connected to the front end of the second connecting arm 5 moves synchronously, and its front inclined surface touches the locking device 304. Since the locking device 304 is rotatably connected to the first connecting rod 303, the pressure applied by the inclined surface of the buckle 313 causes the locking device 304 to overcome the restriction of the limiting rod 305 and rotate outward around the first connecting rod 303, gradually releasing the locking restraint on the buckle 313 and realizing unlocking. During this process, the various components are linked in an orderly manner according to the mechanical structure, and the unlocking and bending are smoothly connected.

[0038] As shown in Figures 1-3, limit plates 7 are fixedly connected to the left side of the two left second connecting arms 5 and the rear of the right side of the two right second connecting arms 5. The left side of the multiple limit plates 7 is set on the rear side wall of the first connecting plate 4. By setting the limit plates 7 on the rear side of the second connecting arms 5, the first connecting arms 2 and the second connecting arms 5 that are about to be unfolded are limited to prevent the arms from rotating excessively after unfolding.

[0039] The left side of each of the two left second connecting arms 5 and the right side of each of the two right second connecting arms 5 are rotatably connected to a second connecting plate 8. The right side wall of each second connecting plate 8 is fixedly connected to a second support plate 9. The top of each second support plate 9 is fixedly connected to a rotator 10. The top of each rotator 10 is rotatably connected to a wing 11. The second connecting plate 8 connects to the second support plate 9 to drive the rotator 10 to rotate, thereby driving the wing 11 to fold and store. The right side of each of the two left first connecting arms 2 and the left side of each of the two right first connecting arms 2 are rotatably connected to a second connecting rod 12. The bottom outer side of each second connecting rod 12 is rotatably connected to a first connecting block 13. The other side of each of the four first connecting blocks 13 is fixedly connected to a buckle 14. The second connecting rod 12 on the right side of the first connecting arm 2 can stably drive the first connecting arm 2 to rotate inside the storage slot 6. The first connecting block 13 at the bottom of the second connecting rod 12 connects to the buckle 14 to fix the first connecting arm 2 inside the drone body 1.

[0040] As shown in Figures 1-13, each storage slot 6 has an installation slot 15 on both the upper and lower sides. The installation slot 15 provides a track-like sliding area for the second connecting rod 12. When the second connecting rod 12 slides to the rear of the installation slot 15, it can be detached from the interior of the installation slot 15.

[0041] The drone body 1 has a housing 16 fixedly connected to the slots on both sides. Each housing 16 has a placement slot 17 at the bottom. The housing 16 is used to protect the internal devices from the outside. In addition, the placement slot 17 can be used to place the buckle 14 into the inside of the housing 16 to fix the arm inside the drone body 1.

[0042] Each outer shell 16 has a sliding support rod 18 inside. The top of each support rod 18 is connected through to the top wall of the drone body 1. Each support rod 18 has a second connecting block 19 fixedly connected to its front and rear sides. Each second connecting block 19 has two elastic bodies 20 fixedly connected to its bottom wall. The bottom walls of every four elastic bodies 20 are fixedly connected to the internal slots of the outer shell 16. Each support rod 18 has a locking block 21 fixedly connected to its bottom. Each buckle 14 is set inside the placement slot 17. The top slot of the buckle 14 corresponds to the locking block 21. The upper and lower ends of each second connecting rod 12 are set inside the mounting slot 15. The elastic bodies 20 connected by the second connecting blocks 19 on the front and rear sides achieve an elastic suspension support state. One end of the elastomer 20 is anchored to the internal slot of the outer shell 16, and the other end supports the second connecting block 19. It lifts the support rod 18 upward with its own elasticity, causing the locking block 21 at the bottom of the support rod 18 to be firmly locked into the top slot of the buckle 14, locking the buckle 14 from the vertical dimension, and reinforcing the connection between the arm and the main body from multiple directions to ensure the structural integrity during flight and daily static storage.

[0043] It should be noted that this utility model is a drone arm folding device. First, when the drone is ready to be folded and stored, the arm is in the working position of unfolded flight. At this time, the components in the fixing mechanism 3 maintain a specific relative state. The first connecting arm 2, the first connecting plate 4, and the second connecting arm 5 are closely cooperated and stably supported. Under the coordinated action of the first inclined block 302 and the limiting rod 305, the locking device 304 is in a locked posture that locks the buckle 313, ensuring that the entire arm is rigidly connected and can withstand various forces during flight.

[0044] When the user manually applies force to push the second connecting arm 5 in an attempt to fold the arm, this external force causes the first connecting plate 4 to rotate around its rotational connection point with the first connecting arm 2, causing the second connecting arm 5 to bend towards the storage slot 6. As the bending action proceeds, the buckle 313 connected to the front end of the second connecting arm 5 moves synchronously, and its inclined front end contacts the locking device 304. Since the locking device 304 is rotatably connected to the first connecting rod 303, the pressure applied by the inclined surface of the buckle 313 causes the locking device 304 to overcome the restriction of the limiting rod 305 and rotate outward around the first connecting rod 303, gradually releasing the locking restraint on the buckle 313 and achieving unlocking. During this process, the various components are linked in an orderly manner according to the mechanical structure, and the unlocking and bending are smoothly connected.

[0045] The second connecting arm 5 continues to rotate until it is completely folded into the predetermined position in the storage slot 6. At this point, the buckle 313 is precisely aligned with the position of the second device box 306. In this final folded posture, the buckle 313 extends into the corresponding area of ​​the second device box 306, and the entire arm is compactly stored on both sides of the drone body 1. The moment the buckle 313 enters the second device box 306, it presses against the second inclined block 312 on the first support plate 307 inside the second device box 306. Under the pressure of the buckle 313, the first support plate 307 overcomes the elastic force of the two sets of springs and moves downward. The first spring 308 is compressed between the first support plate 307 and the bottom wall of the second device box 306, playing a buffering and supporting reset role; at the same time, the top plate 310 moves downward with the first support plate 307 under the linkage of the second spring 309. After the buckle 313 passes the second inclined block 312, the first support plate 307 rebounds under the reaction force of the spring, causing the buckle 313 to fit tightly against the second inclined block 312. The buckle 313 is firmly locked in the locking space formed by the second inclined block 312 and related structures. Moreover, the top plate 310 rises under the push of the second spring 309, making the button 311 protrude from the surface of the second connecting arm 5. On the one hand, this visually indicates to the user that the arm is locked; on the other hand, when the button 311 is pressed, it can trigger the unlocking process again, ensuring that the arm is reliably fixed.

[0046] When the arm needs to be deployed and the drone needs to be put back into flight mode, the user presses the button 311 protruding from the top of the second connecting arm 5. The button 311 is pressed down, causing the top plate 310 to move downward against the elastic force of the second spring 309. The top plate 310 pulls the first support plate 307 downward simultaneously, compressing the first spring 308 and causing the second inclined block 312 to disengage from the tight fit with the buckle 313, releasing the buckle 313. As the buckle 313 is released, the locking device 304, which was originally holding the buckle 313, returns to its initial locked position and waits for the buckle to be released. At this time, the arm is freed from the locking restriction and is only constrained by the rotating connection structure. It can be smoothly deployed under the action of external force, completing the transition from folded and fixed to unlocked and ready to be deployed, preparing for the drone to take off. The entire workflow is precise and efficient, and the mechanical logic is rigorous and clear.

[0047] When the arms are normally installed on the main body 1 of the drone and are in a working state, the first connecting arms 2 on the left and right sides maintain a stable structure thanks to their placement in the storage slots 6 and the connection system built between them by the second connecting rods 12. The upper and lower ends of the second connecting rods 12 are precisely embedded in the mounting slots 15 of the corresponding storage slots 6. This embedding design not only limits the axial movement of the second connecting rods 12, but also ensures the lateral stability of the arms, enabling them to withstand complex forces during flight. At the same time, the first connecting block 13, which is rotatably connected to the outer side of the bottom end of the second connecting rod 12, has its fixed buckle 14 securely placed in the placement slot 17 opened at the bottom of the outer shell 16, fitting tightly and effectively preventing accidental dislodgement.

[0048] The support rod 18, as a key locking and reinforcing element, runs through the top of the drone body 1 and cleverly integrates with the interior of the outer shell 16. It achieves a flexible, suspended support state by relying on the elastic body 20 connected to the second connecting blocks 19 on both the front and rear sides. One end of the elastic body 20 is anchored to a groove inside the outer shell 16, while the other end supports the second connecting block 19. Its own elasticity lifts the support rod 18 upwards, causing the locking block 21 at the bottom of the support rod 18 to firmly engage with the top groove of the buckle 14, locking the buckle 14 vertically. This multi-directional reinforcement of the connection between the arm and the main body ensures structural integrity during flight and when stationary.

[0049] When disassembling the arm, the operation begins by pressing the top of the support rod 18. External force is applied to the top of the support rod 18, overcoming the upward elasticity of the elastic body 20, and pushing the support rod 18 downwards along the through-channel. This downward movement causes the bottom locking block 21 of the support rod 18 to disengage from the top slot of the buckle 14, breaking the vertical lock and completing the first step of unlocking. As the locking block 21 is removed, the buckle 14 is freed from its vertical constraint within the placement slot 17, gaining a certain degree of freedom of movement, laying the foundation for subsequent disassembly. Simultaneously, as the support rod 18 moves downwards, it transmits minute deformations and stress changes to the surrounding structure through mechanical connections. The elastic body 20 further compresses and stores energy, adjusting its shape to adapt to the displacement. Due to the unlocking of the locking block 21, the first connecting block 13, along with the buckle 14, undergoes adaptive displacement and rotation within the placement slot 17 due to the combined effects of the arm's own weight and the external force applied during operation, fine-tuning its posture within the limited space of the placement slot 17. Therefore, the two ends of the second connecting rod 12 are subjected to uneven force in the mounting groove 15. Due to its rotational connection characteristics, it begins to adjust the angle adaptively, and gradually relaxes the lateral constraint on the arm as the arm loosens due to unlocking.

[0050] As the unlocking process continues, the connection between the arm and the drone body 1 weakens. Under continuous external force, the arm is gently pried and pulled manually or with tools. Utilizing the rotational flexibility of components such as the second connecting rod 12 and the first connecting block 13, the arm slowly detaches from the storage slot 6. During this process, each component adjusts its relative position in an orderly manner according to the principles of mechanical kinematics to avoid interference or jamming. The disassembly is complete when the arm is completely detached from the storage slot 6 and physically separated from the drone body 1. After disassembly, the elastic body 20, based on its elastic recovery characteristics, relaxes and returns to its original position, pushing the support rod 18 upwards and resetting. The locking block 21 rises to its initial height, and the latch 14 returns to its original position in the placement slot 17, ready for use. The installation slot 15 remains empty, awaiting the installation of a new arm or subsequent maintenance operations, preparing for the next assembly and use.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A folding arm device for unmanned aerial vehicles (UAVs), comprising the main body of the UAV (1), characterized in that: The main body (1) of the drone has storage slots (6) on both the left and right sides. Each of the four storage slots (6) has a first connecting arm (2) inside. Each first connecting arm (2) is rotatably connected to a first connecting plate (4) on the other side. Each first connecting plate (4) is rotatably connected to a second connecting arm (5) on the other side. Each of the four first connecting plates (4) and the two connecting arms (5) has a fixing mechanism (3) inside. The four fixing mechanisms (3) include: four first device boxes (301), eight locking devices (304), and four second device boxes (306). The outer sides of the four first device boxes (301) are fixedly connected to the front sidewalls of the four first connecting arms (2). Inside, each of the first device boxes (301) has a first inclined block (302) fixedly connected to its inner top wall, and a first connecting rod (303) fixedly connected to the inside of each of the first inclined blocks (302). The eight positioning devices (304) are rotatably connected to the outer sides of the left and right ends of the four first connecting rods (303). Each of the first inclined blocks (302) has a limiting rod (305) fixedly connected to its inside. Each limiting rod (305) is located at the bottom rear side of the two positioning devices (304). The outer sides of the four second device boxes (306) are fixedly connected to the inside of the front side wall of the second connecting arm (5). Each of the second device boxes (306) has a first support plate (307) inside.

2. The UAV arm folding device according to claim 1, characterized in that: Two first springs (308) are fixedly connected to the bottom wall of each first support plate (307). The bottom ends of each pair of first springs (308) are fixedly connected to the inner bottom wall of a second device box (306). Two second springs (309) are fixedly connected to the top wall of each first support plate (307). A top plate (310) is provided inside each second device box (306). The top ends of each pair of second springs (309) are fixedly connected to the bottom wall of a top plate (310).

3. The UAV arm folding device according to claim 2, characterized in that: Each of the top plates (310) is fixedly connected to a button (311) at its top. The outer side of each button (311) extends through the top of the second device box (306) and the second connecting arm (5). Each of the first support plates (307) is fixedly connected to a second inclined block (312) on its front sidewall. Each of the second inclined blocks (312) is fixedly connected to a buckle (313) on its front sidewall. Each buckle (313) is correspondingly set with a locking device (304).

4. The UAV arm folding device according to claim 1, characterized in that: Limiting plates (7) are fixedly connected to the left side of the two left second connecting arms (5) and the rear of the right side of the two right second connecting arms (5). The left side of the multiple limiting plates (7) is located on the rear side wall of the first connecting plate (4). The interior of the left side of the two left second connecting arms (5) and the right side of the two right second connecting arms (5) is rotatably connected to a second connecting plate (8). The right side wall of each second connecting plate (8) is fixedly connected to a second support plate (9). The top of each second support plate (9) is fixedly connected to a rotator (10). The top of each rotator (10) is rotatably connected to a wing (11).

5. The UAV arm folding device according to claim 4, characterized in that: The right side of the two left first connecting arms (2) and the left side of the two right first connecting arms (2) are rotatably connected to the second connecting rod (12). The bottom outer side of each second connecting rod (12) is rotatably connected to the first connecting block (13). The other side of the four first connecting blocks (13) is fixedly connected to the buckle (14).

6. The UAV arm folding device according to claim 1, characterized in that: Each of the storage slots (6) has an installation slot (15) on both the upper and lower sides. The outer shell (16) is fixedly connected to the slots on both the left and right sides of the drone body (1). Each outer shell (16) has a placement slot (17) at the bottom. Each outer shell (16) has a support rod (18) slidably connected inside. The top of each support rod (18) is connected through to the top wall of the drone body (1).

7. The UAV arm folding device according to claim 6, characterized in that: Each of the support rods (18) is fixedly connected to the front and rear sides with a second connecting block (19), and each of the second connecting blocks (19) has two elastic bodies (20) fixedly connected to the bottom wall. The bottom walls of each of the four elastic bodies (20) are fixedly connected to the internal slots of the outer shell (16), and each of the support rods (18) has a locking block (21) fixedly connected to the bottom.

8. The UAV arm folding device according to claim 5, characterized in that: Each of the buckles (14) is located inside the placement groove (17), and the top hole of the buckle (14) is correspondingly set with the buckle block (21). The upper and lower ends of each of the second connecting rods (12) are located inside the mounting groove (15).

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