Unmanned aerial vehicle undercarriage folding and unfolding device

Abstract

The utility model discloses an unmanned aerial vehicle undercarriage deploying and retracting device which comprises a mounting plate, a deploying and retracting assembly and a buffer assembly, the deploying and retracting assembly comprises fixed legs, the tops of the fixed legs are fixedly connected to the bottom of the mounting plate, the bottoms of the fixed legs are movably connected with rotating legs through pin shafts, the number of the rotating legs is four, and the rotating legs are evenly distributed. The inner side of the rotating leg is fixedly connected with an arc-shaped strip, the top of the arc-shaped strip penetrates through the top of the fixed leg, the surface of the arc-shaped strip is meshed with a gear block, the interior of the gear block is fixedly connected with a rotating rod, the rotating rod is located at the bottom of the mounting plate, and the surface of the rotating rod is fixedly connected with a first bevel gear. According to the unmanned aerial vehicle, the supporting legs are rotationally stored through the folding and unfolding assemblies, the undercarriage is stored when the unmanned aerial vehicle flies, the situation that the size of the unmanned aerial vehicle is increased through the undercarriage is avoided, the probability that the unmanned aerial vehicle collides with obstacles is reduced, and the operation difficulty of the unmanned aerial vehicle is reduced.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, specifically to a UAV landing gear retraction and extension device. Background Technology

[0002] A drone is an unmanned aerial vehicle that does not require direct human control and flies by relying on preset programs or remote control. It integrates advanced navigation and positioning, flight control and sensor technologies, and can flexibly perform diverse tasks such as aerial reconnaissance, environmental monitoring and logistics delivery. With its high efficiency, safety and precision, it has shown broad application prospects in agriculture, surveying and mapping, emergency rescue, film and television shooting and other fields, and has become an important carrier of modern science and technology and industrial innovation.

[0003] According to a patent application published on the China Patent Network with announcement number CN220616231U, a drone landing gear includes a landing gear body. One end of a support rod is fixed to the landing gear body, and the other end of the support rod is fixed to the lower end face of a movable frame. A pressure plate is provided above the movable frame, and a support plate is provided on the side of the movable frame. The device also includes a bidirectional threaded rod, with a bearing connected to the support plate. The bidirectional threaded rod and the support plate are locked together by a fastening nut. A limit block is also fixed to the bidirectional threaded rod, and a knob is fixed to the left end of the bidirectional threaded rod through the support plate. The drone landing gear uses an adjustable mounting mechanism, which can be adjusted according to the actual size of the drone to accommodate drones of different sizes, improving the adaptability of the device. Combined with the buffer protection mechanism, it can ensure the stability of the drone landing and effectively prevent the drone from tipping over or colliding due to vibration. However, the drone landing gear has poor storage performance. The landing gear is difficult to store during drone flight. The difficult-to-store landing gear increases the size of the drone, increases the chance of the drone hitting obstacles, and increases the difficulty of operating the drone.

[0004] Therefore, it is necessary to redesign and modify the drone landing gear to effectively prevent it from being difficult to retract or extend. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a drone landing gear retraction and extension device, which has the advantages of retracting and extending the landing gear and solves the problem of difficulty in retracting and extending it.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a drone landing gear retraction and extension device, including a mounting plate, a retraction and extension assembly, and a buffer assembly;

[0007] The retractable assembly includes a fixed leg, the top of which is fixedly connected to the bottom of the mounting plate. A rotating leg is movably connected to the bottom of the fixed leg via a pin. There are four rotating legs evenly distributed. An arc-shaped strip is fixedly connected to the inner side of each rotating leg, with its top extending through to the top of the fixed leg. A gear block meshes with the surface of the arc-shaped strip. A rotating rod is fixedly connected inside the gear block. The rotating rod is located at the bottom of the mounting plate. A helical gear one is fixedly connected to the surface of the rotating rod. A helical gear two meshes with the surface of the helical gear one. A long rod is fixedly connected inside the helical gear two. The long rod is located at the top of the mounting plate. A dual-axis motor is fixedly connected to the inner side of the long rod.

[0008] In a preferred embodiment of this invention, the buffer assembly includes a buffer leg, which is movably connected to a rotating leg. A fixing plate is fixedly connected to the surface of both the buffer leg and the rotating leg. A spring is fixedly connected to the inner side of the fixing plate. The rotating leg is located inside the spring. A buffer airbag is fixedly connected to the bottom of the rotating leg. The bottom of the buffer airbag is fixedly connected to the top of the buffer leg.

[0009] As a preferred embodiment of this invention, the bottom of the dual-axis motor is fixedly connected to a support plate, and the top of the support plate is fixedly connected to the bottom of the mounting plate.

[0010] As a preferred embodiment of this invention, the bottom of the buffer leg is fixedly connected to a base plate, and the number of base plates is two.

[0011] As a preferred embodiment of this invention, a connecting plate is fixedly connected to the inner side of the fixed leg, and the connecting plate is located at the bottom of the rotating rod.

[0012] As a preferred embodiment of this utility model, a protective frame is fixedly connected to the top of the connecting plate, and the first helical gear and the second helical gear are located inside the protective frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model utilizes a retractable assembly to rotate and store the support legs, and to store the landing gear during drone flight, thus avoiding the landing gear increasing the size of the drone, reducing the chance of the drone hitting obstacles, and reducing the difficulty of operating the drone.

[0015] 2. By setting up a buffer component, this utility model can provide buffer protection for the drone during landing, thus improving the landing stability of the drone.

[0016] 3. By setting a support plate, this utility model can support the dual-axis motor, thereby improving the stability of the dual-axis motor.

[0017] 4. By setting a base plate, this utility model can connect the buffer legs to each other, making it easier for the buffer legs to rotate simultaneously and improving the rotational stability of the buffer legs.

[0018] 5. By setting a connecting plate, this utility model can strengthen the connection of the fixed legs and improve the overall strength of the fixed legs.

[0019] 6. By setting up a protective frame, this utility model can protect helical gear one and helical gear two, thereby improving their safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a three-dimensional schematic diagram of the long rod of this utility model;

[0022] Figure 3 This is a three-dimensional schematic diagram of the rotating leg of this utility model;

[0023] Figure 4 This is a three-dimensional schematic diagram of the buffer leg of this utility model.

[0024] In the diagram: 1. Mounting plate; 2. Retractable assembly; 201. Fixed leg; 202. Rotating leg; 203. Arc-shaped strip; 204. Gear block; 205. Rotating rod; 206. Helical gear one; 207. Helical gear two; 208. Long rod; 209. Dual-axis motor; 3. Buffer assembly; 301. Buffer leg; 302. Fixed plate; 303. Spring; 304. Buffer airbag; 4. Support plate; 5. Base plate; 6. Connecting plate; 7. Protective frame. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1 to 4 As shown, the UAV landing gear retraction and extension device provided by this utility model includes a mounting plate 1, a retraction and extension assembly 2, and a buffer assembly 3.

[0027] The retractable assembly 2 includes a fixed leg 201, the top of which is fixedly connected to the bottom of the mounting plate 1. The bottom of the fixed leg 201 is movably connected to a rotating leg 202 via a pin. There are four rotating legs 202, which are evenly distributed. An arc-shaped strip 203 is fixedly connected to the inner side of the rotating leg 202. The top of the arc-shaped strip 203 extends through to the top of the fixed leg 201. A gear block 204 meshes with the surface of the arc-shaped strip 203. A rotating rod 205 is fixedly connected inside the gear block 204. The rotating rod 205 is located at the bottom of the mounting plate 1. A helical gear 1 206 is fixedly connected to the surface of the rotating rod 205. A helical gear 207 meshes with the surface of the helical gear 1 206. A long rod 208 is fixedly connected inside the helical gear 207. The long rod 208 is located at the top of the mounting plate 1. A dual-axis motor 209 is fixedly connected to the inner side of the long rod 208.

[0028] refer to Figure 4 The buffer assembly 3 includes a buffer leg 301, which is movably connected to a rotating leg 202. A fixing plate 302 is fixedly connected to the surface of both the buffer leg 301 and the rotating leg 202. A spring 303 is fixedly connected to the inner side of the fixing plate 302. The rotating leg 202 is located inside the spring 303. A buffer airbag 304 is fixedly connected to the bottom of the rotating leg 202. The bottom of the buffer airbag 304 is fixedly connected to the top of the buffer leg 301.

[0029] As a technical optimization of this utility model, by setting the buffer component 3, the drone can be buffered and protected during landing, thus improving the landing stability of the drone.

[0030] refer to Figure 2 The bottom of the dual-axis motor 209 is fixedly connected to a support plate 4, and the top of the support plate 4 is fixedly connected to the bottom of the mounting plate 1.

[0031] As a technical optimization of this utility model, by setting the support plate 4, the dual-axis motor 209 can be supported, thereby improving the stability of the dual-axis motor 209.

[0032] refer to Figure 2 The bottom of the buffer leg 301 is fixedly connected to a base plate 5, and there are two base plates 5.

[0033] As a technical optimization of this utility model, by setting the base plate 5, the buffer legs 301 can be connected to each other, which facilitates the simultaneous rotation of the buffer legs 301 and improves the rotational stability of the buffer legs 301.

[0034] refer to Figure 1 A connecting plate 6 is fixedly connected to the inner side of the fixed leg 201, and the connecting plate 6 is located at the bottom of the rotating rod 205.

[0035] As a technical optimization of this utility model, by setting the connecting plate 6, the fixed leg 201 can be connected and strengthened, thereby improving the overall strength of the fixed leg 201.

[0036] refer to Figure 2 A protective frame 7 is fixedly connected to the top of the connecting plate 6, and helical gear 1 206 and helical gear 2 207 are located inside the protective frame 7.

[0037] As a technical optimization of this utility model, by setting the protective frame 7, the helical gear 1 206 and the helical gear 207 can be protected, thereby improving the safety of the helical gear 1 206 and the helical gear 207.

[0038] The working principle and usage process of this utility model are as follows: When it is necessary to perform a storage operation on the landing gear of the drone, the dual-axis motor 209 can be started. The dual-axis motor 209 then drives the long rod 208 to rotate. Under the drive of the long rod 208, the second helical gear 207 starts to rotate synchronously, and through the meshing transmission between the gears, the power is transmitted to the first helical gear 206, causing it to rotate. The rotation of the first helical gear 206 further drives the rotating rod 205 connected to it to rotate. The gear block 204 on the rotating rod 205 rotates accordingly and meshes with the teeth on the arc-shaped bar 203, driving the arc-shaped bar 203 to rotate. The rotation of the arc-shaped bar 203 drives the rotating leg 202 to rotate around the pin shaft. The landing gear is rotated until it is fully rotated to the bottom of the mounting plate 1, thus retracting the landing gear. If the landing gear needs to be lowered, the operation process is reversed. In addition, when the UAV performs a landing mission, the bottom of the buffer leg 301 will first contact the ground. At the moment of contact, the ground reaction force pushes the buffer leg 301 upward, which in turn compresses the spring 303 and the buffer airbag 304. The spring 303 disperses the impact force and converts it into multiple small vibrations through its elastic deformation, while the buffer airbag 304 effectively absorbs these small vibrations by utilizing the air compression and release characteristics inside it, thereby achieving comprehensive buffer protection for the UAV during landing.

[0039] In summary, this drone landing gear retraction device utilizes retraction components to rotate and store the support legs, retracting the landing gear during drone flight. This prevents the landing gear from increasing the drone's size, reduces the likelihood of the drone hitting obstacles, simplifies drone operation, and solves the problem of difficult retraction.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drone landing gear retraction device, comprising a mounting plate (1), a retraction assembly (2), and a buffer assembly (3); Its features are: The retractable assembly (2) includes a fixed leg (201), the top of which is fixedly connected to the bottom of the mounting plate (1). A rotating leg (202) is movably connected to the bottom of the fixed leg (201) via a pin. There are four rotating legs (202) evenly distributed. An arc-shaped strip (203) is fixedly connected to the inner side of each rotating leg (202). The top of the arc-shaped strip (203) extends through to the top of the fixed leg (201). A gear block (20) meshes with the surface of the arc-shaped strip (203). 4) A rotating rod (205) is fixedly connected inside the gear block (204). The rotating rod (205) is located at the bottom of the mounting plate (1). A helical gear one (206) is fixedly connected to the surface of the rotating rod (205). A helical gear two (207) meshes with the surface of the helical gear one (206). A long rod (208) is fixedly connected inside the helical gear two (207). The long rod (208) is located at the top of the mounting plate (1). A dual-shaft motor (209) is fixedly connected to the inner side of the long rod (208).

2. The UAV landing gear retraction device according to claim 1, characterized in that: The buffer assembly (3) includes a buffer leg (301), which is movably connected to a rotating leg (202). A fixing plate (302) is fixedly connected to the surface of both the buffer leg (301) and the rotating leg (202). A spring (303) is fixedly connected to the inner side of the fixing plate (302). The rotating leg (202) is located inside the spring (303). A buffer airbag (304) is fixedly connected to the bottom of the rotating leg (202). The bottom of the buffer airbag (304) is fixedly connected to the top of the buffer leg (301).

3. The UAV landing gear retraction device according to claim 1, characterized in that: The bottom of the dual-axis motor (209) is fixedly connected to a support plate (4), and the top of the support plate (4) is fixedly connected to the bottom of the mounting plate (1).

4. The UAV landing gear retraction device according to claim 2, characterized in that: The bottom of the buffer leg (301) is fixedly connected to a base plate (5), and there are two base plates (5).

5. The UAV landing gear retraction device according to claim 1, characterized in that: A connecting plate (6) is fixedly connected to the inner side of the fixed leg (201), and the connecting plate (6) is located at the bottom of the rotating rod (205).

6. The UAV landing gear retraction device according to claim 5, characterized in that: The top of the connecting plate (6) is fixedly connected to a protective frame (7), and the first helical gear (206) and the second helical gear (207) are located inside the protective frame (7).

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