A flexible skin based morphing wing

Abstract

The application belongs to the technical field of unmanned aerial vehicles, and solves the problems of poor stability, complex deformation structure and inability to adjust the sweepback angle of the deformable wing in the prior art.The application provides a deformable wing based on a flexible skin, which comprises fixed wing ribs, movable wing ribs, a flexible skin, a scissor frame, an extension tube and a reciprocating driving member.The movable wing ribs are located on the outer side of the fixed wing ribs, and the flexible skin is wrapped on the outside of the fixed wing ribs and the movable wing ribs.Two adjacent movable wing ribs and the fixed wing ribs and the movable wing ribs are connected through the scissor frame and the extension tube.The reciprocating driving member is arranged between the fuselage and the fixed wing ribs.The inner side end of the scissor frame is connected with the reciprocating driving member, and when the reciprocating driving member moves inward, the scissor frame makes the movable wing ribs unfold.After the scissor frame is unfolded, the reciprocating driving member makes the outer side end of the scissor frame swing backward by moving inward.The wing of the application can be unfolded, stored and adjusted in the sweepback angle, and has simple structure and high stability.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) technology, and more specifically to a deformable wing based on flexible skin. Background Technology

[0002] The increasing demands on unmanned aerial vehicles (UAVs) for reconnaissance, long-range transportation, and medical rescue have led to limitations in the performance of traditional airfoils. Fixed airfoils can only maximize UAV performance under specific conditions, and their inability to adjust to different flight environments hinders performance improvements. Intelligent flexible deformable wings combine flexible materials, deformable structures, and distributed control and sensing technologies to perceive loads and attitudes in real time and adaptively deform, achieving superior performance in various environments and missions. This plays a crucial role in overcoming the shortcomings of traditional airfoils and enhancing UAV performance.

[0003] For example, the patent with publication number CN206068134U provides a variable-span inflatable flexible wing structure. By setting multiple telescopic sleeves and multiple telescopic square tubes between multiple intermediate wing ribs, the wing can be deployed and retracted. However, a set of drive devices is set for each telescopic sleeve and telescopic square tube, which makes the structure complex and costly. Moreover, the coordinated operation of multiple drive devices places high demands on the control system and increases the weight of the wing.

[0004] The patent with publication number CN120903035A provides an inflatable variable-span UAV with an airfoil. It uses multiple X-joint frames to form a telescopic support frame. The deployment and retraction of the wing contouring part can be adjusted by deploying and retracting the telescopic support frame. However, the fork arms of the X-joint frame are set as elastic telescopic structures. Although they can support the flexible skin to adjust the wing shape under air pressure, the overall stability of the X-joint frame is poor. This makes the wing very easy to deform under wind pressure, affecting the stability of the UAV.

[0005] The patent with publication number CN116873189A provides an inflatable deformable wing. The wing's deployment and retraction are adjusted by a structure that works in conjunction with air pressure. The telescopic structure is designed as a telescopic sleeve and an elastic element placed between the telescopic sleeve. During the flight of the drone, the shape of the wing is mainly maintained by the air pressure inside the wing. However, the wing is also prone to deformation under wind pressure, which affects the stability of the drone.

[0006] Meanwhile, the existing deformable wings described above can only achieve wing deployment and retraction, and cannot adjust the wing sweep angle. Therefore, there is an urgent need to develop new types of deformable wings that meet the performance requirements of actual flight in terms of functionality, load-bearing capacity, and reliability. Summary of the Invention

[0007] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this disclosure provides a deformable wing based on flexible skin, which can not only realize the deployment and retraction of the wing, but also adjust the sweep angle of the wing, and has a simple structure and strong stability.

[0008] To achieve the aforementioned objective, the present invention provides a deformable wing based on a flexible skin, comprising a fixed wing rib, a movable wing rib, a flexible skin, a scissor lift, a telescopic tube, and a reciprocating drive component. The fixed wing rib is fixed to the fuselage, the movable wing rib is located outside the fixed wing rib, and the flexible skin covers the outside of the fixed wing rib and the movable wing rib.

[0009] The two adjacent movable ribs and the fixed ribs are connected by the scissor lift and the telescopic tube, and the fixed ribs, movable ribs, scissor lift and telescopic tube form a parallelogram grid;

[0010] The reciprocating drive component is disposed between the fuselage and the fixed wing rib, and the reciprocating drive component can move back and forth along the wingspan direction;

[0011] The inner end of the scissor lift is connected to the reciprocating drive member. When the reciprocating drive member moves inward, it drives the scissor lift to unfold, thereby unfolding the movable wing rib.

[0012] After the scissor lift is fully deployed, the reciprocating drive moves inward to cause the outer end of the scissor lift to swing backward, thereby adjusting the wing sweep angle.

[0013] Optionally, a set of telescopic tubes is provided at both the front and rear ends of the fixed wing rib, and the scissor lift is located between the two sets of telescopic tubes.

[0014] Optionally, both the fixed wing rib and the movable wing rib are provided with through holes, and both the fixed wing rib and the movable wing rib are rotatably sleeved on the outside of the telescopic tube and the scissor lift through the through holes, wherein the through holes are rectangular holes;

[0015] The inner side of the fixed wing rib is provided with a main tube at both the front and rear ends. The outer end of the main tube is fixedly connected to the inner wall of the through hole of the fixed wing rib, and the inner end of the main tube is fixedly connected to the fuselage.

[0016] Optionally, the telescopic tube includes a movable tube, a connecting shaft, and a sliding shaft. The movable tubes are arranged in a one-to-one correspondence with the movable ribs, and adjacent movable tubes are sleeved together. The connecting shaft is fixedly installed on the upper and lower sides of the outer end of the movable tube. The two ends of the connecting shaft are rotatably connected to the two side walls of the through hole of the movable rib. The sliding shaft is fixedly installed on the inner end of the movable tube closest to the fuselage, and the sliding shaft is slidably engaged with the main tube. When the movable ribs are deployed, the movable tube closest to the fuselage can swing backward around the sliding shaft.

[0017] Optionally, the upper and lower sides of the main tube are provided with sliding grooves, and the two ends of the sliding shaft are respectively slidably engaged with the two sliding grooves. When the movable wing rib is deployed, the sliding shaft is located at the outer end of the sliding groove.

[0018] Optionally, the ends of two adjacent forks of the scissor lift are connected by a pivot, and the intersection of two forks in a cross shape is connected by a hinge shaft. The end of the hinge shaft is rotatably connected to the inner wall of the through hole, and the inner end of one of the forks closest to the machine body is connected to the reciprocating drive.

[0019] Two fork arms, which are rotatably mounted outside the same hinge shaft, are respectively provided with arc-shaped grooves and arc-shaped blocks on their opposite surfaces. When the movable wing ribs are deployed, the arc-shaped blocks are inserted into the corresponding arc-shaped grooves.

[0020] Optionally, the reciprocating drive component is provided with a drive groove, and a connecting block is installed on the front fork arm of the scissor lift closest to the fuselage. The connecting block is slidably installed in the drive groove. When the movable wing rib is deployed, the connecting block moves from the rear end to the front end of the drive groove.

[0021] Optionally, the front end of the drive groove is connected to a transverse groove, and the end of the transverse groove away from the drive groove is connected to a longitudinal groove. When the movable wing rib swings backward, the connecting block moves from the rear end of the longitudinal groove to the front end.

[0022] A limiting rod is inserted into the inner end of the telescopic tube. A spring is provided between the inner end of the limiting rod and the machine body. When the reciprocating drive pushes the limiting rod out of the telescopic tube towards the machine body, the connecting block moves from the inner end of the transverse groove to the outer end.

[0023] Optionally, the reciprocating drive includes a reciprocating frame, a lead screw, and a motor. The end of the reciprocating frame is slidably engaged with the main tube. The inner end of the scissor lift is connected to the reciprocating frame. The outer end of the lead screw is rotatably connected to the fixed rib. The lead screw is threadedly engaged with the reciprocating frame. The motor is connected to the inner end of the lead screw.

[0024] Optionally, the fuselage is provided with air vents, and the through holes and air vents form an air inflation / deflation channel. An air inflation / deflation device is connected to the air vents to inflate or deflate the wing.

[0025] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0026] 1. The deformable wing of this application can not only be deployed and retracted, but also has an adjustable sweep angle, thus improving the flight performance of the UAV. Through the optimized combination of a scissor lift, telescopic tube, and reciprocating drive components, a minimalist wing deformation drive mechanism is formed, which can both deploy and retract the wing, and adjust the wing's sweep angle. It has the advantages of simple structure, high stability, and lightweight wing.

[0027] 2. This application separates the wing deployment process from the sweep angle adjustment process by using a reciprocating drive component, a limit rod, and a scissor lift. This ensures that after the wing is deployed, the limit rod can lock the telescopic tube, guaranteeing that the wing has extremely strong stability and rigidity under high wind resistance conditions, thereby improving the flight performance of the UAV. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of a deformable wing based on flexible skin according to the present invention.

[0030] Figure 2 This is the present invention. Figure 1 A schematic diagram of the structure with the flexible skin removed.

[0031] Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the middle;

[0032] Figure 4 This is a schematic diagram of the scissor lift mechanism of the present invention;

[0033] Figure 5 This is the present invention. Figure 4 A diagram showing the disassembly of the scissor lift;

[0034] Figure 6 This is a schematic diagram of the telescopic tube and the main tube of the present invention;

[0035] Figure 7 This is a schematic diagram of the telescopic tube and the main tube of the present invention after being cut open;

[0036] Figure 8 This is the present invention. Figure 7 Enlarged view at point B in the middle;

[0037] Figure 9 This is a schematic diagram of the reciprocating drive component of the present invention.

[0038] The components are as follows: 1. Fixed wing rib; 2. Movable wing rib; 3. Flexible skin; 4. Scissor lift; 401. Fork arm; 402. Rotating shaft; 403. Hinge shaft; 5. Telescopic tube; 501. Movable tube; 502. Connecting shaft; 503. Sliding shaft; 6. Reciprocating drive component; 601. Reciprocating frame; 602. Lead screw; 603. Motor; 7. Through hole; 8. Main tube; 9. Sliding groove; 10. Arc groove; 11. Arc block; 12. Drive groove; 13. Connecting block; 14. Horizontal groove; 15. Longitudinal groove; 16. Limiting rod; 17. Spring; 18. Air hole; 19. Extension arm; 20. Insertion hole; 21. Through groove; 22. Stop bar; 23. Fuselage. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should fall within the scope of the technical content disclosed in the present invention. It should be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0041] Please refer to Figure 1 and Figure 2 This embodiment discloses a deformable wing based on flexible skin, including a fixed wing rib 1, a movable wing rib 2, a flexible skin 3, a scissor lift 4, a telescopic tube 5, and a reciprocating drive component 6. The fixed wing rib 1 is fixed to the fuselage 23, the movable wing rib 2 is located outside the fixed wing rib 1, and the flexible skin 3 covers the outside of the fixed wing rib 1 and the movable wing rib 2.

[0042] The two adjacent movable wing ribs 2 and the fixed wing rib 1 and movable wing rib 2 are connected by scissor lift 4 and telescopic tube 5, and the fixed wing rib 1, movable wing rib 2, scissor lift 4 and telescopic tube 5 form a parallelogram grid.

[0043] The reciprocating drive 6 is disposed between the fuselage 23 and the fixed wing rib 1, and the reciprocating drive 6 can move back and forth along the wingspan direction;

[0044] The inner end of the scissor lift 4 is connected to the reciprocating drive 6. When the reciprocating drive 6 moves inward, it drives the scissor lift 4 to unfold, causing the movable wing rib 2 to unfold.

[0045] After the scissor lift 4 is fully deployed, the reciprocating drive 6 moves inward to cause the outer end of the scissor lift 4 to swing backward, which can adjust the sweep angle of the wing.

[0046] The flexible skin 3 is made of highly elastic material, and the skin mold is made by 3D printing or other methods.

[0047] Before fabricating the flexible skin 3, a release agent is evenly sprayed onto the skin mold. Then, uncured elastic material is poured into the skin mold and a vacuum is applied. After a curing process, the highly elastic flexible skin 3 is demolded. The flexible material is highly customizable and can be designed to suit different UAV models and mission requirements.

[0048] The flexible skin 3, fixed wing rib 1, and movable wing rib 2 are assembled according to the design spacing to obtain a complete deformable wing.

[0049] During operation, the reciprocating drive component 6 moves inward, causing the scissor lift 4 to deploy. The scissor lift 4 then causes the movable wing rib 2 to move outward and deploy. During the deployment of the movable wing rib 2, the telescopic tube 5 moves along with the movable wing rib 2, thereby ensuring the stability of the movable wing rib 2 and the rigidity of the wing, while the flexible skin 3 is stretched. When the movable wing rib 2 moves to its outermost position, the wing reaches a fully deployed state, thus realizing the wing deployment and deformation process.

[0050] As the reciprocating drive unit 6 continues to move inward, the outer end of the scissor lift 4 rotates backward. At this time, the movable wing rib 2 moves backward and maintains its front-to-back orientation. The telescopic tube 5 follows the movable wing rib 2 to make an adaptive rotation, thereby achieving the purpose of adjusting the wing sweep angle.

[0051] In this embodiment, the cooperation of the scissor lift 4, the telescopic tube 5, and the reciprocating drive 6 enables the deployment, retraction, and sweep angle adjustment of the wing. The structure is extremely simple. Compared with the existing technology that uses an electric telescopic rod to control the wing deployment and a servo motor to adjust the wing sweep angle, this greatly simplifies the structural complexity, eliminates the need for too many additional control and transmission components, and has the advantage of a lighter overall weight after the wing is deformed.

[0052] Please refer to Figure 2 The fixed wing rib 1 has a set of telescopic tubes 5 at both its front and rear ends, and the scissor lift 4 is located between the two sets of telescopic tubes 5. In this embodiment, the distance between the scissor lift 4 and the two sets of telescopic tubes 5 is the same. When the wing deforms, the forces on the fixed wing rib 1 and the movable wing rib 2 are more balanced, which can improve the stability of the wing. Specifically, the front-rear direction in this embodiment refers to the front-rear direction when the UAV is flying.

[0053] Please refer to Figure 2 Both the fixed wing 1 and the movable wing 2 are provided with through holes 7. Both the fixed wing 1 and the movable wing 2 are rotatably connected to the outside of the telescopic tube 5 and the scissor lift 4 through the through holes 7. The through holes 7 are rectangular holes.

[0054] Please refer to Figure 1 and Figure 2 The fuselage 23 is provided with air vents 18, and through holes 7 and air vents 18 form an air inflation / deflation channel. An air inflation / deflation device is connected to the air vents 18 to inflate or deflate the wing. Through holes 7 connect the area between the fuselage 23 and the fixed wing rib 1, the area between the fixed wing rib 1 and the movable wing rib 2, and the area between two adjacent movable wing ribs 2, so that the interior of the wing forms a complete cavity.

[0055] When the wing deforms, air is injected into or expelled from the wing through the inflation device and air vents 18. By controlling the inflation amount, the stiffness and shape of the wing can be quickly changed, achieving precise control over lift and drag. For example, when lift needs to be increased, appropriate inflation can increase the wing area and camber, thereby increasing the lift coefficient; when drag needs to be reduced, adjusting the inflation amount can make the wing more streamlined and reduce air resistance.

[0056] Please refer to Figure 2 The inner side of the fixed wing rib 1 is provided with a main tube 8 at both the front and rear ends. The outer end of the main tube 8 is fixedly connected to the inner wall of the through hole 7 of the fixed wing rib 1, and the inner end of the main tube 8 is fixedly connected to the fuselage 23.

[0057] In this embodiment, the main tube 8 connects the fixed wing rib 1 to the fuselage 23. The main tube 8 and the fixed wing rib 1 together form the mounting base for the movable wing rib 2. At the same time, the area between the fixed wing rib 1 and the fuselage 23 can accommodate the reciprocating drive component 6 and provide space for the reciprocating drive component 6 to drive the movement of the wing deformation.

[0058] Please refer to Figure 6The telescopic tube 5 includes a movable tube 501, a connecting shaft 502, and a sliding shaft 503. The movable tube 501 is arranged one-to-one with the movable wing rib 2, and two adjacent movable tubes 501 are sleeved together. The connecting shaft 502 is fixedly installed on the upper and lower sides of the outer end of the movable tube 501. The two ends of the connecting shaft 502 are rotatably connected to the two side walls of the through hole 7 of the movable wing rib 2, respectively. The sliding shaft 503 is fixedly installed on the inner end of the movable tube 501 closest to the fuselage 23, and the sliding shaft 503 is slidably engaged with the main tube 8. When the movable wing rib 2 is deployed, the movable tube 501 closest to the fuselage 23 can swing backward with the sliding shaft 503 as the center.

[0059] In this embodiment, both the main tube 8 and the movable tube 501 are square tubes, with the inner end of the movable tube 501 closest to the fuselage 23 inserted into the main tube 8. By setting up the scissor lift 4, during wing deployment and retraction, since each fork arm 401 of the scissor lift 4 will deploy or retract the same distance, all movable tubes 501 move the same distance, and all movable wing ribs 2 deploy and retract synchronously. Adjacent movable wing ribs 2 maintain a relatively stable state. Compared to the prior art method of pushing and pulling the outermost movable wing rib 2 solely through the extended end of an electric telescopic rod, the prior art's movable wing rib 2 in the middle and the outermost movable wing rib 2 are in a relatively mobile state. During wing deformation, the wing undergoes random movements, affecting lift and drag, leading to decreased UAV stability. In this application, the wing exhibits extremely strong overall integrity throughout the entire wing deformation process, making lift and drag easier to control and improving balance.

[0060] Please refer to Figure 2 , Figure 3 , Figures 6 to 8 The upper and lower sides of the main tube 8 are provided with sliding grooves 9. The two ends of the sliding shaft 503 are respectively slidably engaged with the two sliding grooves 9. When the movable wing rib 2 is unfolded, the sliding shaft 503 is located at the outer end of the sliding groove 9.

[0061] In this embodiment, during the wing deployment and retraction process, the sliding shaft 503 slides within the sliding groove 9. When the wing is not fully deployed, the sliding shaft 503 does not move to the outer end of the sliding groove 9. At this time, since the main tube 8 and the movable tube 501 closest to the fuselage 23 automatically form a limit in the swing direction of the telescopic tube 5, the wing deployment process and the sweep angle adjustment process will not interfere with each other.

[0062] Please refer to Figure 4 The ends of two adjacent forks 401 of the scissor lift 4 are connected by a pivot 402. The intersection of the two forks 401 in a cross shape is connected by a hinge 403. The end of the hinge 403 is rotatably connected to the inner wall of the through hole 7. The inner end of one of the forks 401 closest to the body 23 is connected to the reciprocating drive 6.

[0063] Please refer to Figure 5 Two fork arms 401, which are rotatably mounted outside the same hinge shaft 403, are respectively provided with arc-shaped grooves 10 and arc-shaped blocks 11 on their opposite surfaces. When the movable wing rib 2 is unfolded, the arc-shaped blocks 11 are inserted into the corresponding arc-shaped grooves 10.

[0064] In this embodiment, the hinge shaft 403 is disposed within the through hole 7, allowing the movable rib 2 to be fitted onto the intersection of the fork arms 401 within the scissor lift 4. This significantly reduces the size of the through hole 7 and maximizes the strength and rigidity of the movable rib 2 after it is fitted onto the scissor lift 4, thereby improving the rigidity and stability of the wing. Simultaneously, during the wing swing adjustment of the sweep angle, the connecting shaft 502 and the hinge shaft 403 are aligned, effectively limiting the movable rib 2 at three points and providing strong stability.

[0065] After the wing is fully deployed, the arc-shaped groove 10 and the arc-shaped block 11 form a limit on the scissor lift 4, preventing the scissor lift 4 from continuing to deploy. Thus, the scissor lift 4 will not malfunction during the adjustment of the wing sweep angle. Under the force of the reciprocating drive component 6, the scissor lift 4 as a whole maintains strong stability and has extremely high rigidity, thereby improving the stability of the wing.

[0066] Please refer to Figures 3 to 5 The reciprocating drive unit 6 is provided with a drive groove 12. Among the two fork arms 401 closest to the fuselage 23 of the scissor fork 4, a connecting block 13 is installed on the fork arm 401 located on the front side. The connecting block 13 is slidably installed in the drive groove 12. When the movable wing rib 2 is deployed, the connecting block 13 moves from the rear end to the front end of the drive groove 12.

[0067] In this embodiment, the drive slot 12, in conjunction with the connecting block 13, effectively connects the reciprocating drive component 6 and the scissor lift 4. Please refer to... Figure 3 and Figure 5 Of the two fork arms 401 closest to the fuselage 23 of the scissor lift 4, the inner end of the fork arm 401 located on the front side is fixedly connected to an extension arm 19, and a connecting block 13 is rotatably mounted on the inner end of the extension arm 19. After the wing sweep angle is adjusted, the extension arm 19 is in a state where the inner end is tilted backward, which makes it easier for the scissor lift 4 to reset.

[0068] Please refer to Figure 3 and Figure 9 The front end of the drive groove 12 is connected to a transverse groove 14, and the end of the transverse groove 14 away from the drive groove 12 is connected to a longitudinal groove 15. When the movable wing rib 2 swings backward, the connecting block 13 moves from the rear end of the longitudinal groove 15 to the front end.

[0069] Please refer to Figure 7 and Figure 8A limiting rod 16 is inserted into the inner end of the telescopic tube 5. A spring 17 is provided between the inner end of the limiting rod 16 and the machine body 23. When the reciprocating drive 6 pushes the limiting rod 16 out of the telescopic tube 5 towards the machine body 23, the connecting block 13 moves from the inner end of the transverse groove 14 to the outer end.

[0070] Please refer to Figure 8 The inner end of the movable tube 501 closest to the fuselage 23 is provided with a socket 20, and the limiting rod 16 is inserted into the socket 20.

[0071] By setting the transverse groove 14, after the wing is deployed, the connecting block 13 moves within the transverse groove 14, and the scissor lift 4 remains in the deployed state, thus keeping the wing stably in the deployed state. Simultaneously, it provides additional travel for the reciprocating drive 6. This additional travel separates the two processes of wing deployment and sweep angle adjustment, allowing the limiting rod 16 to limit the telescopic tube 5 by inserting into the insertion hole 20 after the wing is deployed, preventing the telescopic tube 5 from swinging. This allows the wing to be locked more stably in the deployed state, improving wing stability.

[0072] When the connecting block 13 moves to the outer end of the transverse groove 14, as the reciprocating drive 6 continues to move inward, the connecting block 13 moves forward along the longitudinal groove 15, causing the scissor lift 4 to swing around the hinge axis 403 closest to the fuselage 23, thereby achieving the function of adjusting the wing sweep angle.

[0073] Please refer to Figure 9 The reciprocating drive unit 6 includes a reciprocating frame 601, a lead screw 602, and a motor 603. The end of the reciprocating frame 601 is slidably engaged with the main tube 8. The inner end of the scissor lift 4 is connected to the reciprocating frame 601. The outer end of the lead screw 602 is rotatably connected to the fixed wing rib 1. The lead screw 602 is threadedly engaged with the reciprocating frame 601. The motor 603 is connected to the inner end of the lead screw 602.

[0074] Please refer to Figure 3 and Figure 6 The end of the reciprocating frame 601 is slidably sleeved outside the main body tube 8. The upper and lower sides of the main body tube 8 are provided with through grooves 21. The two sides of the inner end of the limiting rod 16 are fixedly connected with stop rods 22. The stop rods 22 extend out of the through grooves 21. During the process of the reciprocating frame 601 driving the scissor frame 4 to unfold, the reciprocating frame 601 moves inward. When the wing is fully unfolded, the inner end face of the reciprocating frame 601 contacts the stop rods 22. During the process of the limiting rod 16 being pulled out of the insertion hole 20, the spring 17 is compressed.

[0075] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A deformable wing based on flexible skin, characterized in that, It includes a fixed wing rib (1), a movable wing rib (2), a flexible skin (3), a scissor lift (4), a telescopic tube (5), and a reciprocating drive (6). The fixed wing rib (1) is fixed to the fuselage (23), the movable wing rib (2) is located outside the fixed wing rib (1), and the flexible skin (3) covers the outside of the fixed wing rib (1) and the movable wing rib (2). The two adjacent movable wing ribs (2) and the fixed wing rib (1) and the movable wing rib (2) are connected by the scissor lift (4) and the telescopic tube (5), and the fixed wing rib (1), movable wing rib (2), scissor lift (4) and telescopic tube (5) form a parallelogram grid; The reciprocating drive (6) is disposed between the fuselage (23) and the fixed wing rib (1), and the reciprocating drive (6) can move back and forth along the wingspan direction; The inner end of the scissor lift (4) is connected to the reciprocating drive (6). When the reciprocating drive (6) moves inward, it drives the scissor lift (4) to unfold, thereby unfolding the movable wing rib (2). After the scissor lift (4) is fully deployed, the reciprocating drive (6) moves inward to cause the outer end of the scissor lift (4) to swing backward, thereby adjusting the sweep angle of the wing. The telescopic tube (5) includes a movable tube (501), a connecting shaft (502), and a sliding shaft (503). The movable tube (501) is arranged in a one-to-one correspondence with the movable wing rib (2). Two adjacent movable tubes (501) are sleeved together. The connecting shaft (502) is fixedly installed on the upper and lower sides of the outer end of the movable tube (501). The two ends of the connecting shaft (502) are rotatably connected to the two side walls of the through hole (7) of the movable wing rib (2). The sliding shaft (503) is fixedly installed on the inner end of the movable tube (501) closest to the fuselage (23). The sliding shaft (503) is slidably engaged with the main tube (8). When the movable wing rib (2) is deployed, the movable tube (501) closest to the fuselage (23) can swing backward with the sliding shaft (503) as the center. The reciprocating drive component (6) is provided with a drive groove (12). Among the two forks (401) of the scissor lift (4) closest to the fuselage (23), a connecting block (13) is installed on the fork (401) located on the front side. The connecting block (13) is slidably installed in the drive groove (12). When the movable wing rib (2) is deployed, the connecting block (13) moves from the rear end of the drive groove (12) to the front end. The front end of the drive groove (12) is connected to a transverse groove (14), and the end of the transverse groove (14) away from the drive groove (12) is connected to a longitudinal groove (15). When the movable wing rib (2) swings backward, the connecting block (13) moves from the rear end of the longitudinal groove (15) to the front end. A limiting rod (16) is inserted into the inner end of the telescopic tube (5). A spring (17) is provided between the inner end of the limiting rod (16) and the machine body (23). When the reciprocating drive (6) pushes the limiting rod (16) out of the telescopic tube (5) towards the machine body (23), the connecting block (13) moves from the inner end of the transverse groove (14) to the outer end.

2. The deformable wing based on flexible skin according to claim 1, characterized in that, Both ends of the fixed wing rib (1) are provided with a set of telescopic tubes (5), and the scissor lift (4) is located between the two sets of telescopic tubes (5).

3. The deformable wing based on flexible skin according to claim 1, characterized in that, Both the fixed wing rib (1) and the movable wing rib (2) are provided with through holes (7). Both the fixed wing rib (1) and the movable wing rib (2) are rotatably sleeved on the outside of the telescopic tube (5) and the scissor lift (4) through the through holes (7). The through holes (7) are rectangular holes. The inner side of the fixed wing rib (1) is provided with a main tube (8) at both the front and rear ends. The outer end of the main tube (8) is fixedly connected to the inner wall of the through hole (7) of the fixed wing rib (1), and the inner end of the main tube (8) is fixedly connected to the fuselage (23).

4. A deformable wing based on flexible skin according to claim 1, characterized in that, The main tube (8) is provided with sliding grooves (9) on both the upper and lower sides. The two ends of the sliding shaft (503) are respectively slidably engaged with the two sliding grooves (9). When the movable wing rib (2) is deployed, the sliding shaft (503) is located at the outer end of the sliding groove (9).

5. A deformable wing based on flexible skin according to claim 4, characterized in that, The ends of two adjacent forks (401) of the scissor lift (4) are connected by a pivot (402), and the intersection of the two forks (401) in a cross shape is connected by a hinge (403). The end of the hinge (403) is rotatably connected to the inner wall of the through hole (7), and the inner end of one of the forks (401) closest to the fuselage (23) is connected to the reciprocating drive (6). Two fork arms (401) rotatably mounted outside the same hinge shaft (403) are respectively provided with arc grooves (10) and arc blocks (11) on their opposite surfaces. When the movable wing rib (2) is unfolded, the arc block (11) is inserted into the corresponding arc groove (10).

6. A deformable wing based on flexible skin according to claim 3, characterized in that, The reciprocating drive unit (6) includes a reciprocating frame (601), a lead screw (602), and a motor (603). The end of the reciprocating frame (601) is slidably engaged with the main tube (8). The inner end of the scissor lift (4) is connected to the reciprocating frame (601). The outer end of the lead screw (602) is rotatably connected to the fixed wing rib (1). The lead screw (602) is threadedly engaged with the reciprocating frame (601). The motor (603) is connected to the inner end of the lead screw (602).

7. A deformable wing based on flexible skin according to claim 3, characterized in that, The fuselage (23) is provided with an air hole (18), and the through hole (7) and the air hole (18) form an air filling and emptying channel. An air filling and emptying device is connected to the air hole (18) to fill and empty the air inside the wing.

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