Unmanned aerial vehicle landing gear folding mechanism and unmanned aerial vehicle
Patent Information
- Application Number
- CN202522418188.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-14
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-14
AI Technical Summary
[0004]本申请旨在提出一种无人机起落架折叠机构及无人机，以解决相关技术中无人机起落架拆装操作不便导致收纳效率低，拆离后起落架易丢失或受损增加维护成本，以及飞行中起落架易松动影响飞行安全的技术问题
本申请提供的无人机起落架折叠机构，固定座安装于无人机机臂，固定座的外壁设置凸起部，在凸起部端面间隔设置有第一凹槽及第二凹槽，凸起部转动连接折叠组件，具体的，折叠组件包括与凸起部转动连接的转动件及设置于转动件上的锁止件，转动件背离所述凸起部的一端用于连接支撑脚，当起落架转动到展开或收起的极限位置时，即支撑脚处于展开状态或折叠状态时，锁止件受弹力的影响滑入第一凹槽或第二凹槽，使得支撑脚被固定保持展开状态或折叠状态，当需要将起落架在展开状态与折叠状态之间进行切换时，通过按压锁止件即可解开锁止，从而即保证了起落架在展开状态或折叠状态时的稳定性，又实现起落架在两种状态之间的快速切换，同时，起落架无需完全从无人机拆离，即避免拆下来的起落架容易出现丢失或意外受损，又提高无人机收纳的效率。
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Figure CN224916258U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a UAV landing gear folding mechanism and a UAV. Background Technology
[0002] As a core support component for drone takeoff and landing, the landing gear not only needs to ensure the stability of the drone during takeoff and landing, but also needs to meet the convenience requirements during drone storage. Its fixation and operation performance directly affect the overall efficiency and operational safety of the drone.
[0003] In related technologies, there are two main methods for fixing drone landing gear. One is screw fixing, which makes the disassembly and assembly of the landing gear extremely complicated and time-consuming when storing the drone, seriously affecting the efficiency of drone storage. The other is quick-release screws, which can speed up the disassembly and assembly to some extent compared to screw fixing, but it still takes a lot of time to disassemble and assemble the landing gear. In addition, the disassembled landing gear is prone to being lost or accidentally damaged. At the same time, the landing gear is also prone to loosening during flight, affecting the flight stability of the drone and posing a safety hazard. Utility Model Content
[0004] This application aims to propose a drone landing gear folding mechanism and a drone to solve the technical problems in related technologies, such as inconvenient drone landing gear disassembly and assembly leading to low storage efficiency, easy loss or damage of the landing gear after disassembly increasing maintenance costs, and easy loosening of the landing gear during flight affecting flight safety.
[0005] In a first aspect, embodiments of this application provide a drone landing gear folding mechanism, including: A mounting base is used to connect the arm of a drone. The outer surface of the mounting base is provided with a protrusion, and the end face of the protrusion is provided with a first groove and a second groove at intervals. The folding assembly includes a rotating member rotatably connected to the protrusion and a locking member disposed on the rotating member. One end of the rotating member opposite to the protrusion is used to connect a support leg. The locking member has an unlocked state and a locked state. When in the unlocked state, the rotating member can rotate around the protrusion to switch the support leg between an unfolded state and a folded state. When in the locked state, the locking member extends at least partially into the first groove or the second groove to lock and fix the rotating member when the support leg is in the unfolded or folded state.
[0006] In some embodiments, a guide groove is provided at one end of the rotating member, and the protrusion extends at least partially into the guide groove and is rotatably connected to the rotating member.
[0007] In some embodiments, the rotating member has a through hole for mounting the locking member, the axis of the through hole being perpendicular to the rotation plane of the rotating member and communicating with the guide groove.
[0008] In some embodiments, the through hole penetrates the opposite end face of the locking member, and a portion of the through hole is provided with an enlarged portion, which extends into the guide groove from the outer end face of the rotating member.
[0009] In some embodiments, the locking member includes a pin disposed in the through hole, a cap connected to one end of the pin extending outside the through hole, and an elastic element sleeved on the pin with its two ends respectively abutting the cap and the outer surface of the rotating member.
[0010] In some embodiments, the pin is provided with a boss located in the enlarged hole portion. When the locking member is switched to the locked state, the boss is at least partially slid into the first groove or the second groove by the elastic force of the elastic element.
[0011] In some embodiments, when the support leg is in a non-expanded or folded state, the projected profile of the boss portion along the axial direction at least partially overlaps with the profile of the protrusion portion.
[0012] In some embodiments, the outer end face of the rotating member away from the flared portion is provided with a recessed groove coaxial with the through hole, and one end of the elastic element abuts into the recessed groove.
[0013] Secondly, this application provides a drone that includes a drone landing gear folding mechanism as described in any of the first aspects above.
[0014] In some embodiments, the folding mechanism is connected to the drone's arms and support legs respectively. When the landing gear switches from an extended state to a folded state, the support legs rotate and retract to the circumferential side of the arms.
[0015] Compared with the prior art, the technical solution provided in this application has at least the following beneficial effects: The drone landing gear folding mechanism provided in this application has a fixed base installed on the drone arm. The outer wall of the fixed base has a protrusion, and a first groove and a second groove are spaced apart on the end face of the protrusion. The protrusion is rotatably connected to a folding assembly. Specifically, the folding assembly includes a rotating component rotatably connected to the protrusion and a locking component disposed on the rotating component. One end of the rotating component away from the protrusion is used to connect to a support leg. When the landing gear rotates to the limit position of unfolding or retracting, that is, when the support leg is in the unfolded or folded state, the locking component slides into the first groove or the second groove under the influence of elastic force, so that the support leg is fixed and kept in the unfolded or folded state. When it is necessary to switch the landing gear between the unfolded and folded states, the locking component can be released by pressing it. This ensures the stability of the landing gear in the unfolded or folded state and realizes the rapid switching of the landing gear between the two states. At the same time, the landing gear does not need to be completely removed from the drone, which avoids the easy loss or accidental damage of the removed landing gear and improves the efficiency of drone storage.
[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the unfolded state of the unmanned aerial vehicle arm with an installed folding mechanism according to an embodiment of this application; Figure 2 It is based on Figure 1 A magnified view of part A in the middle; Figure 3 This is a structural schematic diagram of the fixing base provided according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the folding component provided according to an embodiment of this application; Figure 5 This is a first-view structural schematic diagram of the rotating component provided in the embodiments of this application; Figure 6 This is a second-view structural schematic diagram of the rotating component provided in the embodiments of this application; Figure 7 This is a structural schematic diagram of the locking member provided according to an embodiment of this application; Figure 8This is a schematic diagram of the folded state structure of the drone arm with the folding mechanism provided in the embodiments of this application; Figure 9 This is a structural schematic diagram of a drone provided according to an embodiment of this application.
[0019] Figure label: 100. Folding mechanism; 200. Machine arm; 300. Support leg; 301. Rubber foot cover; 10. Fixing base; 11. Protrusion; 111. First groove; 112. Second groove; 113. First shaft hole; 20. Rotating component; 21. Guide groove; 22. Second shaft hole; 23. Through hole; 231. Enlarged hole section; 24. Sunken groove; 30. Locking element; 31. Pin; 311. Boss; 32. Shaft cover; 33. Elastic element. Detailed Implementation
[0020] The embodiments of this application are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely for explaining this application and are not intended to limit this application.
[0021] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. "Multiple" means at least two, that is, two or more; "multiple" means at least two, that is, two or more.
[0022] In this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.
[0025] Currently, there are two main methods for securing drone landing gear. One is screw fixing, which makes disassembling and assembling the landing gear extremely complex and time-consuming when storing the drone, severely impacting storage efficiency. The other is quick-release screws, which, while faster than screw fixing to some extent, still require considerable time. Furthermore, the removed landing gear is prone to loss or accidental damage. Additionally, because the landing gear requires manual disassembly and reassembly of the screws each time, it is susceptible to loosening during drone flight, affecting flight stability and posing safety hazards.
[0026] Based on this, the inventors proposed a drone landing gear folding mechanism to solve the problems of inconvenient disassembly and assembly, easy loss and damage, and easy loosening during flight of drone landing gear in related technologies. It enables the landing gear to be quickly, conveniently and stably unfolded and retracted, while avoiding loss or damage of the landing gear during storage and ensuring stability during flight.
[0027] Please see Figures 1 to 4 This embodiment provides a folding mechanism for a drone landing gear. The folding mechanism 100 includes a fixed base 10 and a folding assembly. The fixed base 10 is used to connect the drone arm 200. The outer surface of the fixed base 10 is provided with a protrusion 11. The end face of the protrusion 11 is provided with a first groove 111 and a second groove 112 at intervals. The folding assembly includes a rotating member 20 rotatably connected to the protrusion 11 and a locking member 30 disposed on the rotating member 20. One end of the rotating member 20 away from the protrusion 11 is used to connect to the support leg 300. The locking member 30 has an unlocked state and a locked state. When it is in the unlocked state, the rotating member 20 can rotate around the protrusion 11 to switch the support leg 300 between an unfolded state and a folded state. When it is in the locked state, the locking member 30 extends at least partially into the first groove 111 or the second groove 112 to lock and fix the rotating member 20 when the support leg 300 is in the unfolded state or the folded state.
[0028] Specifically, the mounting base 10 can be a fixing ring adapted to the outer contour of the UAV arm 200, thereby achieving fixation by fitting the fixing ring onto the arm 200. To facilitate the unfolding and folding of the support leg 300 and reduce the space occupied by the support leg 300 after folding, the mounting base 10 can be installed at the end of the arm 200 near the motor mount. After the mounting base 10 is installed, the rotating component 20 is located below the arm 200. The rotation angle range of the rotating component 20 can be 0°-170°, which can be selected according to actual needs. It should be understood that the rotation angle of the rotating component 20 can be the angle formed by the intersection of the axes of the support leg 300 and the arm 200. At the same time, the extended or folded state of the support leg 300 is located at the maximum and minimum rotation angle of the rotating member 20, respectively. When the support leg 300 is in the folded state, the support leg 300 is retracted and located below the outer contour of the arm 200. When the support leg 300 is in the extended state, the support leg 300 rotates to the maximum angle that can be formed with the axis of the arm 200. Also, when the support leg 300 is in the extended or folded state, the locking member 30 can automatically extend into the first groove 111 or the second groove 112 to lock and fix the rotating member 20, thereby ensuring the stability of the support leg 300 when it is in the extended or folded state.
[0029] It should be noted that the locking member 30 is slidably connected to the rotating member 20. Specifically, the locking member 30 can slide relative to the rotating member 20 in a direction perpendicular to the plane of rotation. The protrusion 11 can be a connecting lug. The first groove 111 and the second groove 112 are formed on the outer wall surrounding the rotation axis, which is the axis of rotational connection between the rotating member 20 and the protrusion 11. The first groove 111 and the second groove 112 can be arc-shaped grooves. At the same time, the first groove 111 and the second groove 112 penetrate through the opposite end face of the protrusion 11 in the thickness direction. During rotation, the protrusion 11 can keep the locking member 30 in the unlocked state, that is, the locking member 30 and the protrusion 11 can rotate relative to each other. When the support foot 300 is in the unfolded or folded state, due to the setting of the first groove 111 and the second groove 112, the locking member 30 is extended into the first groove 111 or the second groove 112 under the action of elastic force. Thus, in the direction of relative rotation between the rotating member 20 and the protrusion 11, the interaction between the locking member 30 and the first groove 111 or the second groove 112 achieves locking and fixing of the rotating member 20.
[0030] The UAV landing gear folding mechanism 100 provided in this embodiment has a fixed base 10 mounted on the UAV arm 200. The outer wall of the fixed base 10 is provided with a protrusion 11. A first groove 111 and a second groove 112 are provided at intervals on the end face of the protrusion 11. The protrusion 11 is rotatably connected to a folding assembly. Specifically, the folding assembly includes a rotating member 20 rotatably connected to the protrusion 11 and a locking member 30 provided on the rotating member 20. The end of the rotating member 20 facing away from the protrusion 11 is used to connect to a support leg 300. When the landing gear rotates to the limit position of unfolding or retracting, that is, when the support leg 300 is in the unfolded state. When the landing gear is in the unfolded or folded state, the locking member 30 slides into the first groove 111 or the second groove 112 under the influence of the spring force, so that the support leg 300 is fixed in the unfolded or folded state. When it is necessary to switch the support leg 300 between the unfolded and folded states, the locking member 30 can be pressed to unlock it. This ensures the stability of the landing gear in the unfolded or folded state and enables quick switching between the two states. At the same time, the landing gear does not need to be completely removed from the drone, which avoids the landing gear from being easily lost or accidentally damaged, and improves the efficiency of drone storage.
[0031] Please see Figures 3 to 5 In some embodiments, a guide groove 21 is provided at one end of the rotating member 20, and the protrusion 11 extends at least partially into the guide groove 21 and is rotatably connected to the rotating member 20. Specifically, a first shaft hole 113 is provided through the end face of the protrusion 11 along the thickness direction, and a second shaft hole 22 is provided on the rotating member 20 through the opposite end face. At the same time, the second shaft hole 22 passes through the guide groove 21, so that the rotating member 20 and the protrusion 11 are rotatably connected by a rotating shaft passing through the first shaft hole 113 and the second shaft hole 22. Furthermore, the guide groove 21 is open on the top and side end faces of the rotating member 20, so that when the rotating member 20 rotates to the landing gear in the deployed state, one side end face of the protrusion 11 can just abut against part of the inner wall of the guide groove 21. Thus, in the deployed state, the guide groove 21 provided by the rotating member 20 can limit multiple end faces of the protrusion 11, improving the stability of the connection between the rotating member 20 and the fixed seat 10.
[0032] Please see Figures 4 to 6In some embodiments, the rotating member 20 has a through hole 23 for mounting the locking member 30. The axis of the through hole 23 is perpendicular to the rotation plane of the rotating member 20 and communicates with the guide groove 21. The through hole 23 penetrates the opposite end face of the locking member 30, and a portion of the through hole 23 is provided with an enlarged portion 231. The enlarged portion 231 extends from the outer end face of the rotating member 20 into the guide groove 21. Specifically, the opening direction of the through hole 23 is the same as the opening direction of the second shaft hole 22. The enlarged portion 231 can be opened from one end face of the rotating member 20 and extend into the guide groove 21. At the same time, the enlarged portion 231 is connected to the guide groove 21. The arrangement of the enlarged portion 231... This restricts the sliding formation of the locking member 30 within the through hole 23, allowing the locking member 30 to slide more easily into the first groove 111 or the second groove 112 when switching from the unlocked state to the locked state. To improve stability in the locked state, the first groove 111 or the second groove 112 can be set as part of the circle containing the enlarged hole 231. That is, during the rotation of the rotating member 20, there is a moment when the contour of the first groove 111 or the second groove 112 and the enlarged hole 231 exactly combine to form a complete cylindrical cavity, allowing the locking member 30 to slide naturally into the first groove 111 or the second groove 112.
[0033] Please see Figures 4 to 7 In some embodiments, the locking member 30 includes a pin 31 disposed in the through hole 23, a shaft cover 32 connected to one end of the pin 31 extending outside the through hole 23, and an elastic element 33 sleeved on the pin 31 with its two ends respectively abutting against the shaft cover 32 and the outer surface of the rotating member 20. The pin 31 is provided with a boss portion 311 located in the enlarged hole portion 231. When the locking member 30 is switched to the locked state, the boss portion 311 is at least partially slid into the first groove 111 or the second groove 112 by the elastic force of the elastic element 33.
[0034] In this embodiment, the boss portion 311 protrudes from the circumferential contour of the pin 31. The boss portion 311 can be a cylindrical segment, and the diameter of the boss portion 311 is larger than the diameter of the pin 31. The shaft cover 32 is fixedly connected to the end of the pin 31 away from the boss portion 311. During installation, the pin 31 can be inserted through the enlarged hole portion 231 and exit from the other end face of the locking member 30. After the elastic element 33 is coaxially sleeved on the pin 31, the shaft cover 32 and the pin 31 are fixedly connected. The fixed connection can be a threaded connection. After the locking member 30 is installed, the two ends of the elastic element 33 abut against the side wall of the shaft cover 32 and the rotating member 20, respectively, while the pin 31 can slide in the through hole 23.
[0035] It should be noted that the elastic element 33 can be a spring structure. When the locking member 30 is in the locked state, the elastic element 33 is in its original length state. During the unfolding or folding of the landing gear, taking the switching from the unfolded state to the folded state of the support leg 300 as an example, the principle of the locking member 30 is as follows: manually pressing the shaft cover 32 causes the boss 311 to disengage from the first groove 111. At this time, the rotation of the rotating member 20 and the boss 11 is unrestricted, so the support leg 300 can be manually moved closer to the arm 200 and rotated. The diameter of the boss portion 311 is larger than the diameter of the pin 31. The inner end face of the boss portion 311 abuts against the end face of the protrusion portion 11. At this time, the elastic element 33 is in a compressed state. When the support foot 300 rotates to the folded state, the second groove 112 and the flared portion form a cylindrical cavity. The inner end face of the boss portion 311 separates from the end face of the protrusion portion 11 and is subjected to the elastic force of the elastic element 33, thereby causing the boss portion 311 to extend and slide into the second groove 112, thereby achieving locking and fixation when the support foot 300 is in the folded state.
[0036] Optionally, when the support leg 300 is in a non-expanded or folded state, the projection of the boss portion 311 along the axial direction at least partially overlaps with the outline of the protrusion portion 11. This arrangement allows the inner end face of the boss portion 311 to be limited and blocked by the side end face of the protrusion portion 11, thereby facilitating the rotation of the rotating member 20. At the same time, it enables the automatic switching of the locking member 30 from the unlocked state to the locked state.
[0037] Continue reading Figures 4 to 7 In some embodiments, the outer end face of the rotating member 20 away from the flared part is provided with a recessed groove 24 coaxial with the through hole 23. One end of the elastic element 33 abuts into the recessed groove 24. By setting the recessed groove 24, one end of the elastic element 33 is limited, thereby improving the stability of the elastic element 33 during the compression process.
[0038] Please see Figure 1 , Figure 8 and Figure 9This embodiment provides a drone, which includes a drone landing gear folding mechanism 100 as described in any of the above embodiments. The folding mechanism 100 is connected to the drone's arm 200 and support foot 300. The support foot 300 can be made of carbon tubing. A rubber foot cover 301 can be fitted on the end of the support foot 300 away from the folding mechanism 100. Since the landing gear is connected to the drone body in both the retracted and extended states, the carbon tubing support foot 300 is lightweight, which helps to reduce the overall weight of the drone and improve its endurance and maneuverability. The folding mechanism 100 can automatically lock at the extreme positions of the landing gear in both the extended and retracted states by the elastic force of the elastic element 33, without the need for additional locking operations, and has good stability. At the same time, when switching between the extended and retracted states of the landing gear, it is only necessary to press down the axle cover 32 and rotate it, without complicated operations. When the landing gear switches from the extended state to the retracted folded state, the support foot 300 rotates and folds into the circumferential side of the arm 200. Therefore, when the landing gear is in the retracted and folded state, the entire drone occupies less space.
[0039] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model.
[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.
[0041] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0042] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A folding mechanism for the landing gear of a drone, characterized in that, include: A mounting base is used to connect the arm of a drone. The outer surface of the mounting base is provided with a protrusion, and the end face of the protrusion is provided with a first groove and a second groove at intervals. The folding assembly includes a rotating member rotatably connected to the protrusion and a locking member disposed on the rotating member. One end of the rotating member opposite to the protrusion is used to connect a support leg. The locking member has an unlocked state and a locked state. When in the unlocked state, the rotating member can rotate around the protrusion to switch the support leg between an unfolded state and a folded state. When in the locked state, the locking member extends at least partially into the first groove or the second groove to lock and fix the rotating member when the support leg is in the unfolded or folded state.
2. The UAV landing gear folding mechanism according to claim 1, characterized in that, One end of the rotating component has a guide groove, and the protrusion extends at least partially into the guide groove and is rotatably connected to the rotating component.
3. The UAV landing gear folding mechanism according to claim 2, characterized in that, The rotating component has a through hole for installing the locking component. The axis of the through hole is perpendicular to the rotation plane of the rotating component and communicates with the guide groove.
4. The UAV landing gear folding mechanism according to claim 3, characterized in that, The through hole penetrates the opposite end face of the locking member, and a portion of the through hole is provided with an enlarged portion, which extends to the outer end face of the rotating member and into the guide groove.
5. The UAV landing gear folding mechanism according to claim 4, characterized in that, The locking element includes a pin disposed in the through hole, a cap connected to one end of the pin extending outside the through hole, and an elastic element sleeved on the pin with its two ends respectively abutting the cap and the outer surface of the rotating element.
6. The UAV landing gear folding mechanism according to claim 5, characterized in that, The pin is provided with a boss located in the enlarged hole. When the locking member is switched to the locked state, the boss is at least partially slid into the first groove or the second groove by the elastic force of the elastic element.
7. The UAV landing gear folding mechanism according to claim 6, characterized in that, When the support leg is in a non-expanded or folded state, the projected outline of the boss portion along the axial direction at least partially overlaps with the outline of the protrusion portion.
8. The UAV landing gear folding mechanism according to claim 5, characterized in that, The outer end face of the rotating component away from the flared part is provided with a recessed groove coaxial with the through hole, and one end of the elastic element abuts into the recessed groove.
9. A drone, characterized in that, The drone includes a drone landing gear folding mechanism as described in any one of claims 1-8.
10. The UAV according to claim 9, characterized in that, The folding mechanism is connected to the drone's arms and support legs respectively. When the landing gear switches from the unfolded state to the folded state, the support legs rotate and fold into the circumferential side of the arms.