UAV wing folding mechanism and UAV

Abstract

The present invention discloses a wing folding mechanism for a UAV and a UAV, comprising: a first wing is arranged on a rotating shaft and can rotate around the rotating shaft along a first guide groove, a first elastic member is arranged on the rotating shaft and connected between the first wing and a connecting seat; a second wing is arranged on the rotating shaft and can rotate around the rotating shaft along a second guide groove, a second elastic member is arranged on the rotating shaft and connected between the second wing and a plug; a limiting device is detachably arranged between the first wing and the second wing, the first wing is pressed down to the bottom end of the first guide groove, and the second wing is pushed up to the top end of the second guide groove, so that the first wing is located below the second wing and has the same extension direction as the second wing. The UAV wing folding mechanism of the present invention is simple in form and compact in structure, can quickly transition from a folded wing state to a straight wing state, and is easy to disassemble and assemble.

Description

Technical Field

[0001] The present invention belongs to the technical field of unmanned aerial vehicles, and more specifically, relates to a wing folding mechanism of an unmanned aerial vehicle and the unmanned aerial vehicle. Background Art

[0002] With the continuous advancement of drone technology, drones are widely used in various fields such as military and civilian use. In order to improve the convenience of storage and transportation of drones, drones need to be disassembled when necessary, so the disassembly and assembly of various parts of drones should be simple and fast. In addition, some drones cannot take off autonomously and need to be launched by catapult or canister. During catapult or canister launch, the wings are in a folded state, and after takeoff, the wings need to be quickly changed from the folded state to the straight wing state.

[0003] Therefore, it is expected to develop a UAV wing folding mechanism and a UAV that can achieve rapid transition of wing states and can be easily disassembled and assembled. Summary of the invention

[0004] The purpose of the present invention is to provide a UAV wing folding mechanism and a UAV, which can be suitable for catapult or barrel launch take-off, realize rapid transition of wing states, and are easy to disassemble and transport.

[0005] In order to achieve the above object, the present invention provides a UAV wing folding mechanism, comprising:

[0006] A rotating shaft, wherein a connecting seat is provided at the bottom end of the rotating shaft, a plug is provided at the top end, a first guide groove and a second guide groove are provided on the side of the rotating shaft, the first guide groove and the second guide groove are spiral-shaped and parallel to each other, and the first guide groove is located on a side of the second guide groove close to the connecting seat;

[0007] a first wing and a first elastic member, wherein the first wing is disposed on the rotating shaft and can rotate around the rotating shaft along the first guide groove, and the first elastic member is disposed on the rotating shaft and connected between the first wing and the connecting seat;

[0008] a second wing and a second elastic member, wherein the second wing is disposed on the rotating shaft and can rotate around the rotating shaft along the second guide groove, and the second elastic member is disposed on the rotating shaft and connected between the second wing and the plug;

[0009] a limiting device, wherein the limiting device is detachably disposed between the first wing and the second wing, and the first wing is pressed down to the bottom end of the first guide groove, and the second wing is pushed up to the top end of the second guide groove, so that the first wing is located below the second wing and has the same extension direction as the second wing;

[0010] By removing the limiting device, the first elastic member can push the first wing to rotate along the first guide groove to the top end of the first guide groove, and the second elastic member can push the second wing to rotate along the second guide groove to the bottom end of the second guide groove, so that the first wing and the second wing have the same height and extend in opposite directions.

[0011] Optionally, a first swivel is provided at the root of the first wing, a first slider is provided in the first guide groove, and the first wing is sleeved on the rotating shaft through the first swivel and connected to the first slider;

[0012] A second swivel is provided at the root of the second wing, a second slider is provided in the second guide groove, and the second wing is sleeved on the rotating shaft through the second swivel and connected to the second slider.

[0013] Optionally, the first sliding block includes a first main body portion and a first connecting portion connected to each other, the first main body portion is arranged in the first guide groove, the first connecting portion protrudes from a side surface of the rotating shaft, and the top surface of the first rotating ring is connected to the bottom surface of the first connecting portion;

[0014] The second sliding block includes a second main body portion and a second connecting portion connected to each other, the second main body portion is arranged in the second guide groove, the second connecting portion protrudes from the side surface of the rotating shaft, and the bottom surface of the second rotating ring is connected to the top surface of the second connecting portion.

[0015] Optionally, a first limiting groove is provided on the top surface of the first swivel, and a second limiting groove is provided on the bottom surface of the second swivel. When the first wing is located at the top end of the first guide groove and the second wing is located at the bottom end of the second guide groove, the second connecting portion can be embedded in the first limiting groove, and the first connecting portion can be embedded in the second limiting groove.

[0016] Optionally, a first groove is provided on a side wall of the first guide groove close to the plug, the first groove is close to a top end of the first guide groove, and when the first sliding block is located at the top end of the first guide groove, the upper end of the first main body can be embedded in the first groove;

[0017] A second groove is provided on the side wall of the second guide groove close to the connecting seat, and the second groove is close to the bottom end of the second guide groove. When the second sliding block is located at the bottom end of the second guide groove, the lower end of the second main body can be embedded in the second groove.

[0018] Optionally, the limiting device is an explosive bolt, the first slider is provided with a first threaded hole, and the second slider is provided with a second threaded hole;

[0019] When the first wing is located at the bottom end of the first guide groove and the second wing is located at the top end of the second guide groove, the first threaded hole is coaxial with the second threaded hole, and the two ends of the explosive bolt are respectively arranged in the first threaded hole and the second threaded hole.

[0020] Optionally, the first elastic member includes a first compression spring and a first torsion spring, the outer diameter of the first compression spring is smaller than the inner diameter of the first torsion spring, the first compression spring is sleeved on the rotating shaft and connected between the first wing and the connecting seat, the first torsion spring is sleeved on the first compression spring, and two ends of the first torsion spring are respectively connected to the first wing and the connecting seat;

[0021] The second elastic member includes a second compression spring and a second torsion spring, the outer diameter of the second compression spring is smaller than the inner diameter of the second torsion spring, the second compression spring is sleeved on the rotating shaft and connected between the second wing and the plug, the second torsion spring is sleeved on the second compression spring, and the two ends of the second torsion spring are respectively connected to the second wing and the plug.

[0022] Optionally, the plug includes a retaining ring and a nut, the top of the rotating shaft is provided with an external thread, the nut is connected to the rotating shaft through a thread, and the retaining ring is arranged between the nut and the second elastic member.

[0023] Optionally, the rotating shaft is a hollow shaft, and the connecting seat is a flange.

[0024] The present invention also provides a UAV, on which the UAV wing folding mechanism is provided.

[0025] The beneficial effects of the present invention are as follows: the wing folding mechanism of the UAV of the present invention is simple in form, and the rotating shaft includes a guide groove, a connecting seat and a plug for installing an elastic member and a wing. The assembly structure is compact, and the volume of the rotating mechanism is reduced. A limiting device is arranged between the first wing and the second wing to fix the folding angle between the wings, so that the wings are in a folded state. After the UAV is ejected or launched from a tube, the limiting device is removed, and the limit between the wings is released, and the wings are quickly ejected under the thrust and torque of the first elastic member and the second elastic member, thereby realizing a rapid transition from a folded wing state to a straight wing state, and is easy to disassemble and assemble.

[0026] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0028] Figure 1 A schematic diagram of a folding state of a wing folding mechanism of a UAV according to an embodiment of the present invention is shown.

[0029] Figure 2 A schematic diagram of the unfolded state of a UAV wing folding mechanism according to an embodiment of the present invention is shown.

[0030] Figure 3 A schematic diagram of the unfolding process of a UAV wing folding mechanism according to an embodiment of the present invention is shown.

[0031] Figure 4 A schematic structural diagram of a first wing according to an embodiment of the present invention is shown.

[0032] Figure 5 A schematic structural diagram of a second wing according to an embodiment of the present invention is shown.

[0033] Figure 6 A schematic structural diagram of a rotating shaft according to an embodiment of the present invention is shown.

[0034] Figure 7 A schematic structural diagram of a nut according to an embodiment of the present invention is shown.

[0035] Figure 8 A schematic structural diagram of a retaining ring according to an embodiment of the present invention is shown.

[0036] Fig. 9 A schematic structural diagram of a second torsion spring according to an embodiment of the present invention is shown.

[0037] Fig.10 A schematic structural diagram of a second compression spring according to an embodiment of the present invention is shown.

[0038] Fig.11 A schematic structural diagram of a second sliding block according to an embodiment of the present invention is shown.

[0039] Fig.12 A schematic structural diagram of an explosive bolt according to an embodiment of the present invention is shown.

[0040] Fig.13 A schematic structural diagram of a first sliding block according to an embodiment of the present invention is shown.

[0041] Fig.14 A schematic structural diagram of a first torsion spring according to an embodiment of the present invention is shown.

[0042] Fig.15 A schematic structural diagram of a first compression spring according to an embodiment of the present invention is shown.

[0043] Description of Reference Numerals

[0044] 1. first wing; 101. first swivel; 102. first wing threaded hole; 103. first limiting groove; 2. second wing; 201. second swivel; 202. second wing threaded hole; 203. second limiting groove; 3. rotating shaft; 301. second guide groove; 302. first guide groove; 303. countersunk hole; 304. first groove; 305. second groove; 4. nut; 5. retaining ring; 6. second torsion spring; 7. second compression spring; 8. second slider; 801. second connecting part; 802. second connecting hole; 803. second threaded hole; 9. explosive bolt; 901. second threaded end; 902. first threaded end; 10. first slider; 1001. first connecting part; 1002. first connecting hole; 1003. first threaded hole; 11. first torsion spring; 12. first compression spring. DETAILED DESCRIPTION

[0045] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0046] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] The invention discloses a wing folding mechanism for a drone, comprising:

[0048] A rotating shaft, a connecting seat is provided at the bottom end of the rotating shaft, a plug is provided at the top end, a first guide groove and a second guide groove are provided on the side of the rotating shaft, the first guide groove and the second guide groove are spiral-shaped and parallel to each other, and the first guide groove is located on a side of the second guide groove close to the connecting seat;

[0049] A first wing and a first elastic member, wherein the first wing is disposed on the rotating shaft and can rotate around the rotating shaft along the first guide groove, and the first elastic member is disposed on the rotating shaft and connected between the first wing and the connecting seat;

[0050] A second wing and a second elastic member, wherein the second wing is disposed on the rotating shaft and can rotate around the rotating shaft along the second guide groove, and the second elastic member is disposed on the rotating shaft and connected between the second wing and the plug;

[0051] A limiting device, which is detachably arranged between the first wing and the second wing, presses the first wing down to the bottom end of the first guide groove, and pushes the second wing up to the top end of the second guide groove, so that the first wing is located below the second wing and has the same extension direction as the second wing;

[0052] By removing the limiting device, the first elastic member can push the first wing to rotate along the first guide groove to the top end of the first guide groove, and the second elastic member can push the second wing to rotate along the second guide groove to the bottom end of the second guide groove, so that the first wing and the second wing have the same height and extend in opposite directions.

[0053] Specifically, the wing folding mechanism of the UAV of the present invention is simple in form, and the rotating shaft includes a guide groove, a connecting seat and a plug for installing an elastic member and a wing. The assembly structure is compact, and the volume of the rotating mechanism is reduced. A limiting device is arranged between the first wing and the second wing to fix the folding angle between the wings, so that the wings are in a folded state. After the UAV is ejected or launched from a tube, the limiting device is removed, and the limit between the wings is released, and the wings are quickly ejected under the thrust and torque of the first elastic member and the second elastic member, thereby realizing a rapid transition from a folded wing state to a straight wing state, and is easy to disassemble and assemble.

[0054] Furthermore, through the design of the spiral guide groove, the wing has a height difference in the folded state, which effectively avoids the interference problem of the folded wing and keeps the height of the wing consistent in the straight state, thereby ensuring flight stability.

[0055] As an optional solution, a first swivel is provided at the root of the first wing, a first slider is provided in the first guide groove, and the first wing is sleeved on the rotating shaft through the first swivel and connected to the first slider;

[0056] A second rotating ring is arranged at the root of the second wing, a second sliding block is arranged in the second guide groove, and the second wing is sleeved on the rotating shaft through the second rotating ring and connected to the second sliding block.

[0057] Specifically, the wing is installed by using the cooperation of the rotating ring and the slider, so that the wing can rotate around the rotating axis and move along the guide groove at the same time, thereby realizing the unfolding and folding of the wing.

[0058] As an optional solution, the first sliding block includes a first main body portion and a first connecting portion connected to each other, the first main body portion is arranged in the first guide groove, the first connecting portion protrudes from the side surface of the rotating shaft, and the top surface of the first rotating ring is connected to the bottom surface of the first connecting portion;

[0059] The second sliding block comprises a second main body and a second connecting part which are connected to each other. The second main body is arranged in the second guide groove. The second connecting part protrudes from the side of the rotating shaft. The bottom surface of the second rotating ring is connected to the top surface of the second connecting part.

[0060] Specifically, the top surface of the first swivel is connected to the bottom surface of the first connecting part, and the bottom surface of the second swivel is connected to the top surface of the second connecting part, which facilitates the connection between the first elastic member and the first swivel and the connection between the second elastic member and the second swivel, thereby ensuring the pushing effect of the elastic member on the wing.

[0061] As an optional solution, a first limiting groove is provided on the top surface of the first swivel, and a second limiting groove is provided on the bottom surface of the second swivel. When the first wing is located at the top end of the first guide groove and the second wing is located at the bottom end of the second guide groove, the second connecting part can be embedded in the first limiting groove, and the first connecting part can be embedded in the second limiting groove.

[0062] Specifically, by providing the first limiting groove and the second limiting groove, the pair of wings can be locked and limited to each other in the unfolded state, thereby fixing the angle between the pair of wings and keeping the relative position between the pair of wings unchanged during flight.

[0063] As an optional solution, a first groove is provided on the side wall of the first guide groove close to the plug, and the first groove is close to the top of the first guide groove. When the first slider is located at the top of the first guide groove, the upper end of the first main body can be embedded in the first groove;

[0064] A second groove is provided on the side wall of the second guide groove close to the connecting seat, and the second groove is close to the bottom end of the second guide groove. When the second sliding block is located at the bottom end of the second guide groove, the lower end of the second main body can be embedded in the second groove.

[0065] Specifically, by providing the first groove and the second groove, the position of a pair of sliders can be fixed when a pair of wings are in an unfolded state, thereby preventing the pair of wings from rotating relative to the rotating shaft, thereby improving the stability of the wings.

[0066] As an optional solution, the limiting device is an explosive bolt, the first slider is provided with a first threaded hole, and the second slider is provided with a second threaded hole;

[0067] When the first wing is located at the bottom end of the first guide groove and the second wing is located at the top end of the second guide groove, the first threaded hole is coaxial with the second threaded hole, and the two ends of the explosive bolt are respectively arranged in the first threaded hole and the second threaded hole.

[0068] Specifically, an explosive bolt is used as a limiting device. After the UAV takes off, a command can be sent to the explosive bolt to detonate the explosive inside it, causing it to break on its own, thereby releasing the limit between a pair of wings and quickly popping them open, quickly transitioning from a folded state to a straight wing state.

[0069] As an optional solution, the first elastic member includes a first compression spring and a first torsion spring, the outer diameter of the first compression spring is smaller than the inner diameter of the first torsion spring, the first compression spring is sleeved on the rotating shaft and connected between the first wing and the connecting seat, the first torsion spring is sleeved on the first compression spring, and the two ends of the first torsion spring are respectively connected to the first wing and the connecting seat;

[0070] The second elastic member includes a second compression spring and a second torsion spring. The outer diameter of the second compression spring is smaller than the inner diameter of the second torsion spring. The second compression spring is sleeved on the rotating shaft and connected between the second wing and the plug. The second torsion spring is sleeved on the second compression spring. The two ends of the second torsion spring are respectively connected to the second wing and the plug.

[0071] Specifically, the first elastic member and the second elastic member are sleeved on the rotating shaft by using torsion springs and compression springs of different diameters, which provide torque and thrust at the same time, thereby realizing the wing rotation and deployment function while minimizing the volume of the rotating mechanism.

[0072] As an optional solution, the plug includes a retaining ring and a nut, the top of the rotating shaft is provided with an external thread, the nut and the rotating shaft are connected by threads, and the retaining ring is arranged between the nut and the second elastic member.

[0073] Specifically, the plug adopts a retaining ring and a nut, which is convenient for disassembly and can provide a stable and reliable supporting force for the elastic member.

[0074] As an optional solution, the rotating shaft is a hollow shaft and the connecting seat is a flange.

[0075] Specifically, the shaft is designed as a hollow structure to reduce the weight of the structure, and the connecting seat adopts a flange structure to facilitate connection and disassembly with the drone.

[0076] The invention also discloses a UAV, on which the UAV wing folding mechanism is provided.

[0077] Specifically, the wing folding mechanism of the UAV is simple in form, compact in assembly, light in weight, and easy to disassemble and maintain. It can reduce the transportation space of the UAV and realize rapid assembly of the UAV, and can realize wing folding and rapid unfolding.

[0078] Example

[0079] This embodiment discloses a wing folding mechanism for a drone. Figure 1 In the folded wing state, Figure 2 In straight wing state, Figure 3 Figure 1 is a schematic diagram of the unfolding process from the folded wing state to the straight wing state. Figure 1 , Figure 2As shown, the UAV wing folding mechanism includes a first wing 1, a second wing 2, a rotating shaft 3, a nut 4, a retaining ring 5, a second torsion spring 6, a second compression spring 7, a second slider 8, an explosive bolt 9, a first slider 10, a first torsion spring 11 and a first compression spring 12.

[0080] like Figure 4 As shown, a first swivel 101 is provided at the root of the first wing 1, and a first limiting groove 103 and a pair of first wing threaded holes 102 are provided on the top surface of the first swivel 101;

[0081] like Figure 5 As shown, a second swivel 201 is provided at the root of the second wing 2, and a second limiting groove 203 and a pair of second wing threaded holes 202 are provided on the bottom surface of the second swivel 201;

[0082] like Figure 6 As shown, a connecting flange is provided at the bottom end of the rotating shaft 3, and a first guide groove 302 and a second guide groove 301 are provided on the side of the rotating shaft 3. The first guide groove 302 and the second guide groove 301 are spiral and parallel to each other. The first guide groove 302 is located on a side of the second guide groove 301 close to the connecting flange; a first groove 304 is provided on a side wall of the first guide groove 302 close to the top end of the rotating shaft 3, and a second groove 305 is provided on a side wall of the second guide groove 301 close to the connecting flange;

[0083] Figure 7 The nut 4 is used to connect with the upper end of the rotating shaft 3 through threaded fittings. Figure 8 The retaining ring 5 has an inner thread on its inner ring for matching with the outer thread on the upper end of the rotating shaft 3;

[0084] Fig. 9 is the second torsion spring 6, Fig.10 is a second compression spring 7, the inner diameter of the second torsion spring 6 is greater than the outer diameter of the second compression spring 7;

[0085] like Fig.11 As shown, the second sliding block 8 includes a second main body portion and a second connecting portion 801 connected to each other, and the second connecting portion 801 is provided with a second connecting hole 802 and a second threaded hole 803;

[0086] Fig.12 The explosive bolt 9 has a first threaded end 902 and a second threaded end 901 at both ends;

[0087] like Fig.13 As shown, the first slider 10 includes a first main body and a first connecting portion 1001 that are connected to each other, and the first connecting portion 1001 is provided with a first connecting hole 1002 and a first threaded hole 1003;

[0088] Fig.14 is the first torsion spring 11, Fig.15 The first compression spring 12 has an inner diameter that is greater than an outer diameter of the first compression spring 12 .

[0089] The positional relationship of each component is as follows:

[0090] The first compression spring 12 is sleeved on the bottom of the rotating shaft 3, and the first torsion spring 11 is sleeved on the first compression spring 12, so the two do not interfere with each other, and the lower end surface of the first torsion spring 11 is fixed to the upper surface of the connecting flange at the bottom end of the rotating shaft 3. Since the inner diameter of the first torsion spring 11 is larger than the outer diameter of the first compression spring 12, the two do not interfere with each other. In order to prevent the two from interfering with each other, an annular groove can also be provided on the upper surface of the connecting flange, so that the lower ends of the first torsion spring 11 and the first compression spring 12 are respectively located in an annular groove to achieve limiting.

[0091] The first wing 1 is sleeved on the rotating shaft 3 through the first rotating ring 101, and the lower surface of the first rotating ring 101 is fixedly connected to the upper end surface of the first torsion spring 11;

[0092] The first main body of the first slider 10 is slidably disposed in the first guide groove 302, the lower surface of the first connecting portion 1001 is in contact with the upper surface of the first rotating ring 101, and the first connecting hole 1002 on the first connecting portion 1001 corresponds to the first wing threaded hole 102 on the first rotating ring 101, and is fastened with a countersunk screw;

[0093] The second main body of the second sliding block 8 is slidably disposed in the second guide groove 301;

[0094] The first threaded end 902 of the explosive bolt 9 is disposed in the first threaded hole 1003 on the first connecting portion 1001, and the second threaded end 901 is disposed in the second threaded hole 803 on the second connecting portion 801, so as to fix the relative positions of the first slider 10 and the second slider 8;

[0095] The second wing 2 is sleeved on the rotating shaft 3 through the second rotating ring 201, and the lower surface of the second rotating ring 201 is in contact with the upper surface of the second connecting portion 801, and the second connecting hole 802 on the second connecting portion 801 corresponds to the second wing threaded hole 202 on the second rotating ring 201, and is fastened with a countersunk screw;

[0096] The second compression spring 7 is sleeved on the upper part of the rotating shaft 3, and the second torsion spring 6 is sleeved on the second compression spring 7. Since the inner diameter of the second torsion spring 6 is larger than the outer diameter of the second compression spring 7, there is no interference between the two, and the lower end surface of the second torsion spring 6 is fixed on the upper surface of the second rotating ring 201;

[0097] The retaining ring 5 is screwed on the upper end of the rotating shaft 3, and the upper end surface of the second torsion spring 6 is fixed on the lower surface of the retaining ring 5. In order to prevent the two from interfering, an annular groove can also be provided on the lower surface of the retaining ring 5, so that the upper ends of the second torsion spring 6 and the second compression spring 7 are respectively located in an annular groove to achieve position limiting;

[0098] The nut 4 is screwed onto the upper end of the rotating shaft 3 and fits with the retaining ring 5 .

[0099] Under the limiting action of the explosive bolt 9, the first wing 1 is pressed down to the bottom end of the first guide groove 302, the first compression spring 12 is compressed, and the first torsion spring 11 is tightened; the second wing 2 is pushed up to the top end of the second guide groove 301, the second compression spring 7 is compressed, and the second torsion spring 6 is tightened. At this time, the first wing 1 is located below the second wing 2 and has the same extension direction as the second wing 2;

[0100] After the drone is ejected, a command is sent to the explosive bolt 9, the explosive inside the explosive bolt 9 explodes, and the limit of the first wing 1 and the second wing 2 is released. Under the joint action of the first compression spring 12 and the first torsion spring 11, the first wing 1 rotates along the first guide groove 302 to the top of the first guide groove 302. Under the joint action of the second compression spring 7 and the second torsion spring 6, the second wing 2 rotates along the second guide groove 301 to the bottom of the second guide groove 301. At this time, the first wing 1 and the second wing 2 have the same height and extend in opposite directions.

[0101] When the first wing 1 is located at the top end of the first guide groove 302 and the second wing 2 is located at the bottom end of the second guide groove 301, the second connecting part 801 can be embedded in the first limiting groove 203, the first connecting part 1001 can be embedded in the second limiting groove 203, and the upper end of the first main body can be embedded in the first groove 304, and the lower end of the second main body can be embedded in the second groove 305.

[0102] The wing folding mechanism of the UAV of this embodiment is simple in form, and the rotating shaft includes functional area designs such as guide grooves, connecting flanges, and upper external threads, which simultaneously realize the folding of the wings, the transfer of wing loads to the fuselage, and the rapid disassembly and assembly of the wings. Its assembly method is compact, and torsion springs and compression springs of different diameters are sleeved on the rotating shaft. While realizing the wing folding function, the volume of the rotating mechanism is minimized; through the design of the spiral guide groove, a pair of wings have a height difference in the folded wing state, which effectively avoids the interference problem of the folded wings, and the height of the pair of wings can be kept consistent in the straight wing state; the folding angle of the pair of wings is fixed by explosive bolts, and the rapid transition of the wings from the folded wing state to the straight wing state is realized by the explosives in the detonated explosive bolts. The overall weight of the mechanism is light, and disassembly and maintenance are convenient, which can reduce the transportation space of the UAV and realize the rapid assembly of the UAV.

[0103] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A wing folding mechanism for a drone, characterized in that: include: A rotating shaft, wherein a connecting seat is provided at the bottom end of the rotating shaft, a plug is provided at the top end, a first guide groove and a second guide groove are provided on the side of the rotating shaft, the first guide groove and the second guide groove are spiral-shaped and parallel to each other, and the first guide groove is located on a side of the second guide groove close to the connecting seat; a first wing and a first elastic member, wherein the first wing is disposed on the rotating shaft and can rotate around the rotating shaft along the first guide groove, and the first elastic member is disposed on the rotating shaft and connected between the first wing and the connecting seat; a second wing and a second elastic member, wherein the second wing is disposed on the rotating shaft and can rotate around the rotating shaft along the second guide groove, and the second elastic member is disposed on the rotating shaft and connected between the second wing and the plug; a limiting device, wherein the limiting device is detachably disposed between the first wing and the second wing, and the first wing is pressed down to the bottom end of the first guide groove, and the second wing is pushed up to the top end of the second guide groove, so that the first wing is located below the second wing and has the same extension direction as the second wing; By removing the limiting device, the first elastic member can push the first wing to rotate along the first guide groove to the top end of the first guide groove, and the second elastic member can push the second wing to rotate along the second guide groove to the bottom end of the second guide groove, so that the first wing and the second wing have the same height and extend in opposite directions.

2. The drone wing folding mechanism according to claim 1, characterized in that: A first swivel is provided at the root of the first wing, a first slider is provided in the first guide groove, and the first wing is sleeved on the rotating shaft through the first swivel and connected to the first slider; A second swivel is provided at the root of the second wing, a second slider is provided in the second guide groove, and the second wing is sleeved on the rotating shaft through the second swivel and connected to the second slider.

3. The drone wing folding mechanism according to claim 2, characterized in that: The first sliding block comprises a first main body and a first connecting portion connected to each other, the first main body is arranged in the first guide groove, the first connecting portion protrudes from the side of the rotating shaft, and the top surface of the first rotating ring is connected to the bottom surface of the first connecting portion; The second sliding block includes a second main body portion and a second connecting portion connected to each other, the second main body portion is arranged in the second guide groove, the second connecting portion protrudes from the side surface of the rotating shaft, and the bottom surface of the second rotating ring is connected to the top surface of the second connecting portion.

4. The drone wing folding mechanism according to claim 3, characterized in that: A first limiting groove is provided on the top surface of the first swivel, and a second limiting groove is provided on the bottom surface of the second swivel. When the first wing is located at the top end of the first guide groove and the second wing is located at the bottom end of the second guide groove, the second connecting portion can be embedded in the first limiting groove, and the first connecting portion can be embedded in the second limiting groove.

5. The drone wing folding mechanism according to claim 3, characterized in that: A first groove is provided on a side wall of the first guide groove close to the plug, the first groove is close to the top of the first guide groove, and when the first sliding block is located at the top of the first guide groove, the upper end of the first main body can be embedded in the first groove; A second groove is provided on the side wall of the second guide groove close to the connecting seat, and the second groove is close to the bottom end of the second guide groove. When the second sliding block is located at the bottom end of the second guide groove, the lower end of the second main body can be embedded in the second groove.

6. The drone wing folding mechanism according to claim 2, characterized in that: The limiting device is an explosive bolt, the first slider is provided with a first threaded hole, and the second slider is provided with a second threaded hole; When the first wing is located at the bottom end of the first guide groove and the second wing is located at the top end of the second guide groove, the first threaded hole is coaxial with the second threaded hole, and the two ends of the explosive bolt are respectively arranged in the first threaded hole and the second threaded hole.

7. The drone wing folding mechanism according to claim 1, characterized in that: The first elastic member includes a first compression spring and a first torsion spring, the outer diameter of the first compression spring is smaller than the inner diameter of the first torsion spring, the first compression spring is sleeved on the rotating shaft and connected between the first wing and the connecting seat, the first torsion spring is sleeved on the first compression spring, and the two ends of the first torsion spring are respectively connected to the first wing and the connecting seat; The second elastic member includes a second compression spring and a second torsion spring, the outer diameter of the second compression spring is smaller than the inner diameter of the second torsion spring, the second compression spring is sleeved on the rotating shaft and connected between the second wing and the plug, the second torsion spring is sleeved on the second compression spring, and the two ends of the second torsion spring are respectively connected to the second wing and the plug.

8. The drone wing folding mechanism according to claim 1, characterized in that: The plug includes a retaining ring and a nut. The top of the rotating shaft is provided with an external thread. The nut is connected to the rotating shaft through threads. The retaining ring is arranged between the nut and the second elastic member.

9. The drone wing folding mechanism according to claim 1, characterized in that: The rotating shaft is a hollow shaft, and the connecting seat is a flange.

10. A drone, characterized in that: The drone is provided with a drone wing folding mechanism according to any one of claims 1-9.

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