An unmanned aerial vehicle with wing folding mechanism

Abstract

This invention relates to the field of foldable wing unmanned aerial vehicle (UAV) technology, and discloses a design including a fuselage, a movable nose at the top of the fuselage, retractable wings fixedly mounted on the left and right sides of the movable nose, a retraction drive between the movable nose and the retractable wings, a lubrication assembly inside the movable nose, and foldable tail wings on both sides of the tail of the movable nose. A motor drives a first bevel gear to rotate, which in turn drives two second bevel gears to rotate, thereby driving two threaded rods to rotate. The threaded connection between the threaded rods and the inner sleeve causes the inner sleeve to move closer to the movable nose, and causes the transition wing to slide relative to the receiving wing. A transmission gear rolls on a rack plate, thereby moving a chain and causing the end wing to slide inwards towards the transition wing, thus causing the transition wing to retract into the receiving wing and the end wing to retract into the transition wing. This allows the wing to perform "two-stage" retraction and extension, achieving a shorter folded length for the same wingspan.

Description

Technical Field

[0001] This invention relates to the field of foldable wing drone technology, specifically to a drone with a wing folding mechanism. Background Technology

[0002] A drone is an unmanned aerial vehicle, typically controlled by radio remote control or autonomous programs, and is widely used in aerial photography, agriculture, transportation, rescue, surveying, power line inspection, and many other fields. To save packaging space, some drones are equipped with foldable, retractable, or tilting wings.

[0003] Chinese patent CN116215907B, filed on April 11, 2023, discloses a tilt-folding, retractable VTOL variant UAV, comprising a fuselage, a retractable wing, and a tail. The retractable wing and tail are connected to the nose and tail of the fuselage respectively via folding mechanisms. Propellers are rotatably connected to both the wing and tail via drive mechanisms. This invention features a tilt-folding, retractable wing VTOL variant UAV with innovative designs such as a large-scale morphing wing and a significant wing-body tilt-folding mechanism, enabling full-modal conversion between fixed-wing and quadcopter modes. It combines the advantages of strong cruise capability and high payload capacity of fixed-wing UAVs with the high maneuverability and high speed of quadcopter UAVs. Furthermore, this variant UAV improves the environmental adaptability of traditional tilt-wing VTOL UAVs, providing a reference path for the design of future novel variant UAVs.

[0004] In this technical solution, the wing can be extended and retracted by the relative sliding of the main wing spar and the aileron spar; however, the lengths of the main wing spar and the aileron spar are similar, and the length after retraction is still relatively long, so the folding effect can be further improved. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a drone with a wing-folding mechanism, which has advantages such as shorter folded length and smaller storage space for the same wingspan, thus solving the problem that the folded wings are still too long.

[0006] (II) Technical Solution To achieve the goal of shorter folded length and smaller storage space for the same wingspan, the present invention provides the following technical solution: a drone with a wing folding mechanism, including a fuselage, a movable nose provided on the top of the fuselage, telescopic wings fixedly installed on the left and right sides of the movable nose, a retraction drive component provided between the movable nose and the telescopic wings, a lubrication component provided inside the movable nose, and folding tail wings provided on both the left and right sides of the tail of the movable nose.

[0007] Preferably, a sliding shaft is fixedly mounted at the bottom of the movable machine head, the cross section of the sliding shaft is in a "convex" shape, two blind holes are symmetrically formed at the bottom of the sliding shaft, positioning pins are slidably connected in the blind holes, and a second spring is fixedly mounted between the top end of each positioning pin and the top wall of the corresponding blind hole; a sliding groove is formed at the top of the machine body, the sliding shaft is slidably connected in the sliding groove, two first positioning holes are formed on the bottom wall of the front end of the sliding groove on the machine body, the two first positioning holes are distributed left and right, two second positioning holes are formed on the bottom wall of the rear end of the sliding groove on the machine body, the two second positioning holes are distributed front and rear, and the positioning pins are inserted into the first positioning holes or the second positioning holes.

[0008] Preferably, two unlocking members are arranged at the bottom of the machine body; each unlocking member comprises a button, a push rod is fixedly mounted at the top of the button, and a first spring is fixedly mounted at the top of the button; two mounting grooves are formed at the bottom of the machine body, the two mounting grooves are respectively communicated with the first positioning holes and the push rods, the buttons are slidably connected in the mounting grooves, the top ends of the first springs are fixedly mounted on the top walls of the mounting grooves; the push rods are slidably connected in the first positioning holes or the second positioning holes.

[0009] Preferably, the telescopic wing comprises two accommodating wings fixedly mounted on the left and right sides of the movable machine head, a transition wing is inserted into one end of each accommodating wing away from the movable machine head, a terminal wing is inserted into one end of each transition wing away from the corresponding accommodating wing, and an extension transmission member is arranged between the accommodating wings, the transition wings and the terminal wings.

[0010] Preferably, the extension transmission member comprises a rack plate, and the rack plate is fixedly mounted on the inner wall of one end of the accommodating wing close to the movable machine head; a cushion block is fixedly mounted on the bottom wall of one end of the transition wing located inside the accommodating wing, the cushion block is attached to the bottom of the rack plate, a transmission gear is arranged on the front side of the cushion block, the transmission gear is rotatably connected to the inner bottom wall of the transition wing, and the transmission gear is meshed with the rack plate; a support plate is fixedly mounted on the inner top wall of one end of the transition wing close to the movable machine head, a gasket is fixedly mounted on the inner bottom wall of the terminal wing, and the gasket is attached to the bottom of the support plate; the tops of both ends of the support plate are rotatably connected with chain wheels, the two chain wheels are connected through a chain, the transmission gear is coaxially fixed with one of the chain wheels, and a connecting block is fixedly mounted between the gasket and the chain.

[0011] Preferably, the retraction drive includes two outer tubes fixedly installed on the left and right sides of the movable head, the outer tubes being located directly below the receiving wing, and a support beam 1 fixedly installed between the end of the outer tube away from the movable head and the receiving wing; an inner tube is inserted into the outer tube, and a support beam 2 is fixedly installed between the inner tube and the end of the transition wing away from the movable head; a threaded rod is threadedly connected to the inner tube, the threaded rod being arranged along the axial direction of the outer tube, and the threaded rod is rotatably connected to the side of the movable head; the retraction drive also includes a motor fixedly installed inside the movable head, the output end of the motor being connected to a bevel gear 1, and bevel gears 2 fixedly installed at opposite ends of the two threaded rods, the two bevel gears 2 meshing on the left and right sides of the bevel gear 1 respectively.

[0012] Preferably, the lubrication assembly includes an oil reservoir fixedly installed inside the movable head, with an arched plate at the center of the bottom of the oil reservoir, the motor located inside the arched plate, and the outer sleeve fixedly installed through the side of the oil reservoir; two partition plates distributed on the left and right are fixedly installed inside the oil reservoir, and a threaded rod is rotatably connected to the partition plates, forming a sandwich between the partition plates and the inner wall of the oil reservoir; each partition plate is connected to an oil inlet pipe and an L-shaped pipe on opposite sides, the oil inlet pipe and the L-shaped pipe being located at the bottom and top of the partition plate respectively, and both the oil inlet pipe and the L-shaped pipe are equipped with a one-way valve, the end of the L-shaped pipe away from the partition plate being located directly above the second bevel gear, and a sealing plug is provided at the top of the movable head.

[0013] Preferably, the folding tail fin includes a fixed cover that is fixedly installed on the side of the tail end of the fuselage. A turntable is rotatably connected inside the fixed cover. A support is fixedly installed at the center of the turntable. The tail fin body is hinged to the support. The fixed cover and the turntable are connected by screws.

[0014] Preferably, a swing limiter is provided between the tail fin body and the support.

[0015] Preferably, the swing limiting component includes a support shaft fixedly installed on the side of the tail end of the fuselage, the support shaft being arranged along the axis of the fixed cover; an insertion tube is sleeved on the outer side of the support shaft, and spiral grooves are arrayed on the circumferential surface of the support shaft; a sliding ball is arrayed and fixed on the inner wall of the insertion tube near the fixed cover end, the sliding ball being slidably connected in the spiral groove; a protrusion is fixedly installed on the circumferential surface of the insertion tube, the protrusion being parallel to the axis of the insertion tube; the insertion tube and the protrusion are slidably connected through the turntable and the center of the support; an insertion hole is opened on the tail fin body, and the insertion tube and the protrusion are inserted into the insertion hole.

[0016] (III) Beneficial Effects Compared with the prior art, the present invention provides a drone with a wing folding mechanism, which has the following beneficial effects:

[0017] 1. This UAV with a wing folding mechanism uses a motor to drive a bevel gear one to rotate, which in turn drives two bevel gears two to rotate, thereby driving two threaded rods to rotate. The threaded connection between the threaded rods and the inner sleeve causes the inner sleeve to move closer to the movable nose, and also causes the transition wing to slide relative to the receiving wing. A transmission gear rolls on a rack plate, driving one of the sprockets to rotate, which in turn moves the chain. This, combined with the connecting block, causes the end wing to slide inwards towards the transition wing, thus causing the transition wing to retract into the receiving wing, and the end wing to retract into the transition wing. This allows the wing to perform "two-stage" retraction and extension, achieving a shorter folded length for the same wingspan.

[0018] 2. This drone with a wing-folding mechanism, by pushing the button upwards, moves the push rod upwards, causing the positioning pin to retract into the blind hole. Then, it pushes the movable head backwards. When the sliding shaft moves to the rear end of the slide groove, the movable head rotates 90°. When the positioning pin aligns with the second positioning hole, under the elastic action of the second spring, the positioning pin is inserted into the second positioning hole. At this time, the retracted telescopic wing is stably placed along the length of the fuselage; thus, the space occupied by the drone is reduced, achieving the purpose of small storage space.

[0019] 3. For this drone with a wing folding mechanism, first remove the screws, then rotate the tail wing body and support as a whole 90° along the turntable axis, so that the insertion tube rotates relative to the support shaft, and the ball slides along the spiral groove, thereby driving the insertion tube and the protrusion to slide relative to the turntable, so that the end of the insertion tube is pulled out from the tail wing body. At this time, turn the tail wing body 90° relative to the support, so that the tail wing body fits against the side of the fuselage, thereby achieving the purpose of folding the tail wing body and further reducing the space occupied by the drone. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a drone with a wing folding mechanism proposed in this invention; Figure 2 This is a three-dimensional cross-sectional view of the fuselage of a drone with a wing folding mechanism proposed in this invention. Figure 3 This is a schematic diagram of the three-dimensional structure of a telescopic wing of a UAV with a wing folding mechanism proposed in this invention; Figure 4 This is a three-dimensional structural diagram of the extension transmission component in the telescopic wing of a UAV with a wing folding mechanism proposed in this invention. Figure 5 This is a three-dimensional cross-sectional view of the telescopic wing and retraction drive component of a UAV with a wing folding mechanism proposed in this invention. Figure 6This is a three-dimensional structural diagram of the retraction drive component of a drone with a wing folding mechanism proposed in this invention; Figure 7 This is a schematic diagram of the front cross-sectional structure of the lubrication assembly of a drone with a wing folding mechanism proposed in this invention. Figure 8 This is a three-dimensional structural diagram of a folding tail wing of a UAV with a wing folding mechanism proposed in this invention. Figure 9 This is a three-dimensional structural diagram of a swing limiter for a drone with a wing folding mechanism proposed in this invention.

[0021] In the diagram: 100, fuselage; 200, movable nose; 300, retractable wing; 400, retraction drive component; 500, lubrication assembly; 600, folding tail fin; 700, swing limit component; 101. Slide groove; 102. Positioning hole one; 103. Positioning hole two; 104. Button; 105. Push rod; 106. Spring one; 107. Mounting groove; 201. Sliding shaft; 202. Blind hole; 203. Locating pin; 204. Spring 2; 301. Receiving wing; 302. Transition wing; 303. End wing; 304. Rack plate; 305. Pad block; 306. Transmission gear; 307. Support plate; 308. Gasket; 309. Sprocket; 310. Chain; 311. Connecting block; 401. Outer tube; 402. Support beam one; 403. Inner sleeve; 404. Support beam two; 405. Threaded rod; 406. Motor; 407. Bevel gear one; 408. Bevel gear two; 501. Oil reservoir; 502. Arched plate; 503. Spare plate; 504. Oil inlet pipe; 505. L-shaped pipe; 506. Check valve; 507. Sealing plug; 601. Fixing cover; 602. Turntable; 603. Support; 604. Tail wing body; 605. Screw; 701, Support shaft; 702, Insert tube; 703, Spiral groove; 704, Slipper ball; 705, Raised strip; 706, Insertion hole. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below 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 embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-9A drone with a wing-folding mechanism includes a fuselage 100, a movable nose 200 at the top of the fuselage 100, which can slide along the length of the fuselage 100 and rotate relative to the fuselage 100. Telescopic wings 300 are fixedly mounted on the left and right sides of the movable nose 200, and a retraction drive component 400 is provided between the movable nose 200 and the telescopic wings 300. A lubrication assembly 500 is provided inside the movable nose 200, and folding tail fins 600 are provided on both the left and right sides of the tail of the movable nose 200. First, the retractable wing 300 is retracted by the retraction drive 400, and then the movable head 200 is pushed to move backward along the length of the fuselage 100. After that, the movable head 200 is rotated 90° so that the retracted retractable wing 300 is set along the length of the fuselage 100, thereby reducing the space occupied by the drone and making it easier to store and carry. The folding tail wing 600 is rotated 90° relative to the fuselage 100 and then deflected forward so that the folding tail wing 600 fits against the side of the fuselage 100, thereby reducing the space occupied by the drone and making it easier to store and carry.

[0024] Please see Figure 2 The bottom of the movable head 200 is fixedly installed with a sliding shaft 201. The cross-section of the sliding shaft 201 is convex. The top of the body 100 is provided with a sliding groove 101. The sliding shaft 201 is slidably connected in the sliding groove 101. The sliding groove 101 is narrow at the top and wide at the bottom, which is adapted to the sliding shaft 201 to prevent the sliding shaft 201 from detaching from the sliding groove 101.

[0025] Two blind holes 202 are symmetrically formed at the bottom of the sliding shaft 201. Specifically, the two blind holes 202 are distributed left and right and are symmetrical about the axis of the sliding shaft 201. A positioning pin 203 is slidably connected inside the blind hole 202. The positioning pin 203 is stepped, and the diameter of its top end is larger than the diameter of its bottom end. A spring 204 is fixedly installed between the top end of the positioning pin 203 and the top wall of the blind hole 202; the elasticity of the spring 204 causes the positioning pin 203 to have a downward tendency to move.

[0026] The machine body 100 has two positioning holes 102 on the bottom wall at the front end of the slide 101. The two positioning holes 102 are distributed left and right. The machine body 100 has two positioning holes 103 on the bottom wall at the rear end of the slide 101. The two positioning holes 103 are distributed front and back. The positioning pin 203 is inserted into the positioning hole 102 or the positioning hole 103.

[0027] When the sliding shaft 201 slides to the front end of the slide groove 101, the positioning pin 203 is inserted into the positioning hole 102. The positioning pin 203 cooperates with the positioning hole 102 to suppress the rotation of the movable head 200 and the sliding shaft 201. At this time, the telescopic wing 300 is perpendicular to the fuselage 100. When the sliding shaft 201 slides to the rear end of the slide groove 101, the movable head 200 is rotated 90° so that the positioning pin 203 is inserted into the positioning hole 203. The positioning pin 203 cooperates with the positioning hole 203 to suppress the rotation of the movable head 200 and the sliding shaft 201. At this time, the telescopic wing 300 is parallel to the fuselage 100.

[0028] Please see Figure 2 The bottom of the body 100 has two unlocking components; each component includes a button 104, a push rod 105 fixedly mounted on the top of the button 104, and a spring 106 fixedly mounted on the top of the button 104. The bottom of the body 100 has two mounting slots 107, which communicate with positioning hole 102 and push rod 105 respectively. The button 104 is slidably connected within the mounting slot 107, the top of spring 106 is fixedly mounted on the top wall of the mounting slot 107, and push rod 105 is slidably connected within positioning hole 102 or positioning hole 103. The elasticity of spring 106 causes the button 104 to tend to move downwards. When spring 106 is in a freely extended state, the bottom of the button 104 is flush with the bottom of the body 100, and push rod 105 is located below positioning pin 203. By pushing the button 104 upward, the push rod 105 moves upward, thereby pushing the positioning pin 203 upward through the push rod 105, causing the positioning pin 203 to retract into the blind hole 202; at this time, the movable head 200 can be pushed to move along the length of the body 100.

[0029] Please see Figure 2 The telescopic wing 300 includes two receiving wings 301 fixedly installed on the left and right sides of the movable nose 200. A transition wing 302 is inserted into the end of the receiving wing 301 away from the movable nose 200, and an end wing 303 is inserted into the end of the transition wing 302 away from the receiving wing 301. An extension transmission component is provided between the receiving wing 301, the transition wing 302, and the end wing 303. The receiving wing 301, the transition wing 302, and the end wing 303 are all hollow.

[0030] The extension transmission component includes a rack plate 304, which is fixedly installed on the inner wall of the receiving wing 301 near the movable head 200. A transition wing 302 is located on the bottom wall of one end inside the receiving wing 301, and a pad 305 is fixedly installed thereon. The pad 305 fits against the bottom of the rack plate 304, thereby supporting the free end of the rack plate 304 and preventing the rack plate 304 from bending downwards due to its own weight.

[0031] A transmission gear 306 is provided on the front side of the pad 305. The transmission gear 306 is rotatably connected to the inner bottom wall of the transition wing 302 and meshes with the rack plate 304. Thus, when the transition wing 302 slides relative to the receiving wing 301, it drives the transmission gear 306 to rotate.

[0032] A support plate 307 is fixedly installed on the inner top wall of the transition wing 302 near the movable nose 200. The support plate 307 is L-shaped and is inserted into the end wing 303. A gasket 308 is fixedly installed on the inner bottom wall of the end wing 303 and fits against the bottom of the support plate 307. The gasket 308 supports the free end of the support plate 307 and prevents the support plate 307 from bending downward.

[0033] Both ends of the pallet 307 are rotatably connected to sprockets 309. The two sprockets 309 are connected by a chain 310. A transmission gear 306 is coaxially fixed to one of the sprockets 309. A connecting block 311 is fixedly installed between a washer 308 and the chain 310. Therefore, when the transmission gear 306 rotates, it drives one of the sprockets 309 to rotate, thereby moving the chain 310. Through the connecting block 311, this causes the end wing 303 to move relative to the transition wing 302. Specifically, when the transition wing 302 moves to the right relative to the receiving wing 301, the extension transmission component causes the end wing 303 to move to the right relative to the transition wing 302; similarly, when the transition wing 302 moves to the left relative to the receiving wing 301, the end wing 303 moves to the left relative to the transition wing 302. This allows the wing, composed of the receiving wing 301, transition wing 302, and end wing 303, to extend or retract.

[0034] Please see Figures 5-6 The retraction drive unit 400 includes two outer tubes 401 fixedly installed on the left and right sides of the movable head 200. The outer tubes 401 are located directly below the receiving wing 301. A support beam 402 is fixedly installed between the end of the outer tube 401 away from the movable head 200 and the receiving wing 301. Thus, the receiving wing 301 is supported by the cooperation of the outer tubes 401 and the support beam 402.

[0035] An inner sleeve 403 is inserted into the outer sleeve 401. A second support beam 404 is fixedly installed between the inner sleeve 403 and the end of the transition wing 302 away from the movable nose 200. Thus, the transition wing 302 is supported by the cooperation of the inner sleeve 403 and the second support beam 404. Specifically, the inner sleeve 403 has a D-shaped cross-section, and the opening profile of the outer sleeve 401 is adapted to the cross-section of the inner sleeve 403, so that the inner sleeve 403 does not rotate relative to the outer sleeve 401 when it slides relative to the outer sleeve 401.

[0036] The inner wall of the inner sleeve 403 is threaded, and a threaded rod 405 is threadedly connected to the inner sleeve 403. The threaded rod 405 is arranged along the axis of the outer sleeve 401 and is rotatably connected to the side of the movable head 200. The retraction drive component 400 also includes a motor 406 fixedly installed in the movable head 200. The output end of the motor 406 is connected to a bevel gear 407. Bevel gears 408 are fixedly installed on opposite ends of the two threaded rods 405, and the two bevel gears 408 mesh with the left and right sides of the bevel gear 407, respectively. Thus, the motor 406 drives the bevel gear 407 to rotate, which in turn drives the two bevel gears 408 to rotate, which in turn drives the two threaded rods 405 to rotate. With the threaded connection between the inner sleeve 403 and the threaded rods 405, the inner sleeve 403 slides relative to the outer sleeve 401, which in turn drives the transition wing 302 to slide relative to the receiving wing 301.

[0037] Please see Figure 5 and Figure 7 The lubrication assembly 500 includes an oil reservoir 501 fixedly installed inside the movable head 200. An arched plate 502 is provided at the center of the bottom of the oil reservoir 501. A motor 406 is located inside the arched plate 502, and the output end of the motor 406 passes through the arched plate 502, so that the bevel gear 407 is located inside the oil reservoir 501. An outer sleeve 401 is fixedly installed through the side of the oil reservoir 501. Two spacer plates 503 are fixedly installed inside the oil reservoir 501, distributed on the left and right. A threaded rod 405 passes through and is rotatably connected to the spacer plates 503. A sandwich is formed between the spacer plates 503 and the inner wall of the oil reservoir 501.

[0038] Each partition plate 503 is connected to an oil inlet pipe 504 and an L-shaped pipe 505 on opposite sides. The oil inlet pipe 504 and the L-shaped pipe 505 are located at the bottom and top of the partition plate 503, respectively. A one-way valve 506 is provided on both the oil inlet pipe 504 and the L-shaped pipe 505. The end of the L-shaped pipe 505 away from the partition plate 503 is located directly above the bevel gear 408. The top of the movable head 200 is provided with an oil injection hole that communicates with the oil storage box 501. The oil injection hole is used to inject lubricating oil into the oil storage box 501. A sealing plug 507 is provided on the top of the movable head 200. The sealing plug 507 is used to seal the oil injection hole.

[0039] The piston structure is formed by the outer sleeve 401 and the inner sleeve 403. When the inner sleeve 403 moves away from the moving head 200 relative to the outer sleeve 401, the interlayer is under negative pressure. The lubricating oil inside the oil storage box 501 enters the interlayer through the oil inlet pipe 504. The lubricating oil in the interlayer then enters the outer sleeve 401 to lubricate the threaded rod 405 and the inner sleeve 403. When the inner sleeve 403 moves closer to the moving head 200, the hydraulic pressure in the interlayer increases, and the lubricating oil is sprayed through the L-shaped pipe 505 onto the surface of the second bevel gear 408 to lubricate the first bevel gear 407 and the second bevel gear 408.

[0040] Please see Figure 8 The folding tail fin 600 includes a fixed cover 601 fixedly mounted on the side of the tail end of the fuselage 100. A turntable 602 is rotatably connected inside the fixed cover 601. A support 603 is fixedly mounted at the center of the turntable 602. The tail fin body 604 is hinged to the support 603. The fixed cover 601 and the turntable 602 are connected by screws 605. This allows the turntable 602 to rotate relative to the fuselage 100, and the tail fin body 604 to deflect relative to the turntable 602. The screws 605 prevent the turntable 602 from rotating further relative to the fixed cover 601.

[0041] Please see Figures 8-9 A swing limiting component 700 is provided between the tail fin body 604 and the support 603. The swing limiting component 700 includes a support shaft 701 fixedly installed on the side of the tail end of the fuselage 100, and the support shaft 701 is arranged along the axis of the fixed cover 601. An insertion tube 702 is sleeved on the outside of the support shaft 701, and spiral grooves 703 are arrayed on the circumferential surface of the support shaft 701. Sliding balls 704 are arrayed and fixed on the inner wall of the insertion tube 702 near the fixed cover 601, and the sliding balls 704 are slidably connected in the spiral grooves 703. A protrusion 705 is fixedly installed on the circumferential surface of the insertion tube 702, and the protrusion 705 is parallel to the axis of the insertion tube 702. The insertion tube 702 and the protrusion 705 are slidably connected through the turntable 602 and the center of the support 603. An insertion hole 706 is provided on the tail fin body 604, and the insertion tube 702 and the protrusion 705 are inserted into the insertion hole 706. Thus, the support 603 and the tail fin body 604 are connected together by the insertion tube 702, which suppresses the deflection of the tail fin body 604 relative to the support 603 and keeps the tail fin body 604 and the support 603 in a parallel state.

[0042] In use, the motor 406 drives the bevel gear 407 to rotate, which in turn drives the two bevel gears 408 to rotate, thereby driving the two threaded rods 405 to rotate. In conjunction with the threaded connection between the threaded rods 405 and the inner sleeve 403, the inner sleeve 403 moves closer to the movable head 200 and drives the transition wing 302 to slide relative to the receiving wing 301. During this process, the transmission gear 306 rolls on the rack plate 304, driving one of the sprockets 309 to rotate, thereby driving the chain 310 to move. In conjunction with the connecting block 311, it drives the end wing 303 to slide into the transition wing 302, thereby causing the transition wing 302 to retract into the receiving wing 301 and the end wing 303 to retract into the transition wing 302. By pushing button 104 upward, push rod 105 pushes positioning pin 203 upward, causing positioning pin 203 to retract into blind hole 202. Then pushes movable head 200 backward. When slide shaft 201 moves to the rear end of slide groove 101, rotate movable head 200 90°. When positioning pin 203 is aligned with positioning hole 2 103, under the elastic action of spring 2 204, positioning pin 203 is inserted into positioning hole 2 103. At this time, the retracted telescopic wing 300 is stably placed along the length of fuselage 100. First, remove screw 605. Then, rotate the tail fin body 604 and support 603 together by 90° along the axis of turntable 602, so that the insertion tube 702 rotates relative to the support shaft 701. The sliding ball 704 slides along the spiral groove 703, thereby driving the insertion tube 702 and the protrusion 705 to slide relative to the turntable 602, so that the end of the insertion tube 702 is pulled out from the tail fin body 604. At this time, turn the tail fin body 604 to deflect 90° relative to the support 603, so that the tail fin body 604 fits against the side of the fuselage 100.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drone with a wing folding mechanism, comprising a fuselage (100), characterized in that: The fuselage (100) is provided with a movable nose (200) on the top, and telescopic wings (300) are fixedly installed on the left and right sides of the movable nose (200). A retraction drive component (400) is provided between the movable nose (200) and the telescopic wings (300). A lubrication component (500) is provided inside the movable nose (200). Folding tail wings (600) are provided on both the left and right sides of the tail of the movable nose (200).

2. The UAV with a wing folding mechanism according to claim 1, characterized in that: The movable head (200) is fixedly installed with a sliding shaft (201) at the bottom. The cross-section of the sliding shaft (201) is convex. Two blind holes (202) are symmetrically opened at the bottom of the sliding shaft (201). A positioning pin (203) is slidably connected in the blind hole (202). A spring (204) is fixedly installed between the top of the positioning pin (203) and the top wall of the blind hole (202). The top of the body (100) is provided with a slide groove (101), and the slide shaft (201) is slidably connected in the slide groove (101). The body (100) has two positioning holes (102) on the bottom wall at the front end of the slide groove (101), and the two positioning holes (102) are distributed left and right. The body (100) has two positioning holes (103) on the bottom wall at the rear end of the slide groove (101), and the two positioning holes (103) are distributed front and back. The positioning pin (203) is inserted into the positioning hole (102) or the positioning hole (103).

3. The UAV with a wing folding mechanism according to claim 2, characterized in that: Two unlocking components are provided at the bottom of the body (100); The unlocking component includes a button (104), a push rod (105) is fixedly installed on the top of the button (104), and a spring (106) is fixedly installed on the top of the button (104). The bottom of the body (100) has two mounting slots (107), which are connected to the positioning hole (102) and the push rod (105) respectively. The button (104) is slidably connected in the mounting slot (107), and the top of the spring (106) is fixedly installed on the top wall of the mounting slot (107). The push rod (105) is slidably connected in positioning hole one (102) or positioning hole two (103).

4. The UAV with a wing folding mechanism according to claim 1, characterized in that: The telescopic wing (300) includes two receiving wings (301) fixedly installed on the left and right sides of the movable nose (200). A transition wing (302) is inserted into the end of the receiving wing (301) away from the movable nose (200), and an end wing (303) is inserted into the end of the transition wing (302) away from the receiving wing (301). An extension transmission component is provided between the receiving wing (301), the transition wing (302) and the end wing (303).

5. The UAV with a wing folding mechanism according to claim 4, characterized in that: The extension transmission component includes a rack plate (304), which is fixedly installed on the inner wall of the receiving wing (301) near the movable head (200); The transition wing (302) is fixedly installed on the bottom wall of one end inside the receiving wing (301) with a pad (305). The pad (305) is attached to the bottom of the rack plate (304). A transmission gear (306) is provided on the front side of the pad (305). The transmission gear (306) is rotatably connected to the bottom wall inside the transition wing (302) and meshes with the rack plate (304). A support plate (307) is fixedly installed on the inner top wall of the transition wing (302) near the movable nose (200), and a gasket (308) is fixedly installed on the inner bottom wall of the end wing (303), with the gasket (308) attached to the bottom of the support plate (307). Both ends of the pallet (307) are rotatably connected to sprockets (309), and the two sprockets (309) are connected by a chain (310). The transmission gear (306) is coaxially fixed with one of the sprockets (309), and a connecting block (311) is fixedly installed between the gasket (308) and the chain (310).

6. The UAV with a wing folding mechanism according to claim 5, characterized in that: The retraction drive (400) includes two outer tubes (401) fixedly installed on the left and right sides of the movable head (200). The outer tubes (401) are located directly below the receiving wing (301). A support beam (402) is fixedly installed between the end of the outer tube (401) away from the movable head (200) and the receiving wing (301). An inner tube (403) is inserted into the outer tube (401), and a second support beam (404) is fixedly installed between the inner tube (403) and the end of the transition wing (302) away from the movable nose (200). The inner sleeve (403) is internally threaded with a threaded rod (405), the threaded rod (405) is arranged along the axial direction of the outer sleeve (401), and the threaded rod (405) is rotatably connected to the side of the movable head (200); The retraction drive (400) also includes a motor (406) fixedly installed in the movable head (200). The output end of the motor (406) is connected to a bevel gear (407). Two bevel gears (408) are fixedly installed on opposite ends of the two threaded rods (405). The two bevel gears (408) mesh on the left and right sides of the bevel gear (407) respectively.

7. The UAV with a wing folding mechanism according to claim 6, characterized in that: The lubrication assembly (500) includes an oil reservoir (501) fixedly installed inside the movable head (200), an arched plate (502) is provided at the bottom center of the oil reservoir (501), the motor (406) is located inside the arched plate (502), and the outer sleeve (401) is fixed through and fixed to the side of the oil reservoir (501). The oil storage box (501) has two partition plates (503) fixedly installed inside, which are distributed on the left and right. The threaded rod (405) is rotatably connected to the partition plate (503). A sandwich is formed between the partition plate (503) and the inner wall of the oil storage box (501). Each of the partition plates (503) is connected to an oil inlet pipe (504) and an L-shaped pipe (505) on opposite sides. The oil inlet pipe (504) and the L-shaped pipe (505) are located at the bottom and top of the partition plate (503), respectively. A one-way valve (506) is provided on the oil inlet pipe (504) and the L-shaped pipe (505). The end of the L-shaped pipe (505) away from the partition plate (503) is located directly above the second bevel gear (408). A sealing plug (507) is provided on the top of the movable head (200).

8. The UAV with a wing folding mechanism according to claim 7, characterized in that: The folding tail fin (600) includes a fixed cover (601) fixedly installed on the side of the tail end of the fuselage (100). A turntable (602) is rotatably connected inside the fixed cover (601). A support (603) is fixedly installed at the center of the turntable (602). The tail fin body (604) is hinged to the support (603). The fixed cover (601) and the turntable (602) are connected by screws (605).

9. The UAV with a wing folding mechanism according to claim 8, characterized in that: A swing limiter (700) is provided between the tail fin body (604) and the support (603).

10. The UAV with a wing folding mechanism according to claim 9, characterized in that: The swing limiting member (700) includes a support shaft (701) fixedly installed on the side of the tail end of the fuselage (100), and the support shaft (701) is arranged along the axis of the fixed cover (601); The support shaft (701) is fitted with a tube (702) on its outer side. The support shaft (701) has an array of spiral grooves (703) on its circumferential surface. The tube (702) has an array of sliding balls (704) fixed on the inner wall of one end near the fixed cover (601). The sliding balls (704) are slidably connected in the spiral grooves (703). A protrusion (705) is fixedly installed on the circumferential surface of the insertion tube (702). The protrusion (705) is parallel to the axis of the insertion tube (702). The insertion tube (702) and the protrusion (705) are slidably connected through the turntable (602) and the support (603) at the center. An insertion hole (706) is opened on the tail fin body (604). The insertion tube (702) and the protrusion (705) are inserted into the insertion hole (706).

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