Unmanned aerial vehicle brake wheel

Abstract

The utility model belongs to the technical field of unmanned plane, concretely relates to an unmanned plane brake wheel, including fork arm, wheel shaft, wheel hub, tyre, bottom cover, brake drum, brake shoe and rocker, the utility model discloses a brake component is integrated in the wheel cavity of wheel hub, has reduced the volume and weight of overall structure, meets the requirement of unmanned plane to light weight and compact structure, has improved the flight performance and endurance of unmanned plane, again adopts the brake mode of brake shoe and brake drum friction, can provide greater braking force, ensures that unmanned plane can stop rapidly and effectively when needing to brake, and realizes the transmission of brake line tension to brake shoe action through rocker, rotating rod and other components, and its structure is simple, transmission efficiency is high, reduces the possibility of energy loss and fault occurrence, and is easy to maintain and overhaul, reduces use cost.

Description

Technical Field

[0001] This utility model belongs to the field of unmanned aerial vehicle (UAV) technology, and specifically relates to a UAV brake wheel. Background Technology

[0002] Small fixed-wing drones are widely used in many fields due to their flexibility, low cost, and ease of operation. As application scenarios expand, lightweight design has become a key area for technological breakthroughs. Achieving lightweight design can reduce the takeoff and landing speed requirements of drones, decreasing reliance on runway length; simultaneously, it can improve their flight speed, range, and endurance, while reducing energy consumption; furthermore, it can reserve more payload space for onboard mission equipment, enhancing the drone's versatility and environmental adaptability.

[0003] The brake wheel is a key component of the take-off and landing system of small fixed-wing UAVs, and its performance directly determines the safety and reliability of take-off and landing. If the brake wheel has a slow response, insufficient braking force, or structural failure, it may cause the UAV to run off the runway, damage the equipment, or even cause casualties.

[0004] However, the brake wheels of current small fixed-wing UAVs generally suffer from problems such as complex structure, large size, and heavy weight, which seriously restrict the realization of lightweight design. Furthermore, the complex structure increases the difficulty and cost of manufacturing and assembly, and reduces reliability and maintainability. The large size occupies internal space and restricts the layout of other equipment. The heavy weight affects flight performance and reduces competitiveness. Utility Model Content

[0005] The purpose of this invention is to provide a brake wheel for unmanned aerial vehicles (UAVs), which solves the technical problems of complex structure, large size and heavy weight of existing brake wheels.

[0006] This utility model discloses a brake wheel for a drone, comprising: Fork arm; The axle is mounted laterally at the bottom end of the fork arm; The hub is rotatably mounted on the axle, and has an annular cavity on one side. The tire is fitted over the outside of the wheel hub; The bottom cover is fixedly fitted onto the axle and seals the wheel cavity; The brake drum is fixedly fitted onto the inner circumference of the wheel cavity; Brake shoes, disposed inside the brake drum, include: Braking body, A support pin, one end of which is connected to the brake body, and the other end of which passes through the wheel cavity. A rotating rod is arranged below the wheel axle, with one end connected to the brake body and the other end passing through the bottom cover and forming a rotational fit with the bottom cover. The rocker arm has one end connected to the end of the rotating rod located outside the bottom cover, and the other end connected to the brake cable.

[0007] This application integrates the braking components into the wheel cavity of the hub, reducing the overall size and weight of the structure, meeting the requirements of UAVs for lightweight and compact structures, and improving the flight performance and endurance of the UAV. Furthermore, by adopting a braking method of friction between the brake shoes and the brake drum, it can provide greater braking force, ensuring that the UAV can decelerate and stop quickly and effectively when braking is required. The transmission of brake cable tension to brake shoe action is achieved through components such as rocker arms and rotating rods. Its structure is simple, has high transmission efficiency, reduces energy loss and the possibility of failure, and is easy to maintain and repair, thus reducing operating costs.

[0008] Based on the above technical solution, the solution of this application can be further improved as follows: Preferably, the braking body comprises: Two horseshoes, in a semi-circular shape, are arranged opposite each other inside the brake drum; The upper mating surface of the shoe has a rotating groove adapted to the support pin, and the end of the rotating rod located inside the bottom cover is flat and fits between the lower mating surfaces of the two shoes. This solution can quickly and accurately convert the tension of the brake cable into friction between the shoe and the brake drum, enabling the drone to decelerate and stop in a short time, improving braking efficiency, ensuring uniform distribution of braking force, reducing vibration and shaking during braking, making the drone braking more stable and reliable, and improving flight safety.

[0009] Preferably, the bottom cover has a first through hole adapted to the rotating rod, and the rotating rod has an integrally formed first limiting ring between the brake body and the bottom cover; by adopting this solution, the axial position and rotational degree of freedom of the rotating rod are controlled, ensuring that the braking system can operate stably and reliably, avoiding problems such as brake failure and uneven braking caused by axial movement or inflexible rotation of the rotating rod, and improving the safety and reliability of UAV braking.

[0010] Preferably, it includes: A limiting block is located on the outside of the bottom cover and beside the wheel axle, and has a limiting hole for the brake cable to pass through. This design fixes the position of the brake cable, preventing it from swinging or jumping significantly during transmission, ensuring that the braking force is stably transmitted to the brake body, thereby enhancing braking stability and achieving a stable and reliable braking effect. It also restrains the brake cable, preventing it from coming off the predetermined position during transmission and improving braking safety.

[0011] Preferably, the wheel hub includes: The wheel hub is rotatably mounted on the wheel axle; The web plate is fixedly sleeved on the outside of the wheel core; The rim is fixedly fitted onto the outside of the web plate, and has annular grooves on its outer periphery for mounting the tire. This design avoids local stress concentration, thereby improving the overall ability to withstand complex loads and exhibiting good deformation resistance. Furthermore, the structure is simple and compact, with a small overall weight, which improves the payload capacity and flight efficiency of the UAV.

[0012] Preferably, it includes: Two bearings are fitted onto the axle at intervals; The wheel core has an installation channel for the wheel axle to pass through, and the two ends of the installation channel have receiving grooves for installing the bearing. This solution stably realizes the relative rotation between the wheel axle and the wheel core, effectively disperses the force, reduces wear, improves the smoothness and reliability of rotation, and provides a precise installation position, ensuring the assembly accuracy of each component. This makes the overall structure compact and reasonable, which is conducive to the efficient and stable operation of the wheel and improves the overall performance.

[0013] Preferably, the wheel hub is formed by two halves joined together, and the two halves are detachably connected. This solution enables convenient and efficient installation and disassembly, facilitates maintenance and replacement, reduces maintenance costs and time, simplifies mold design and processing, and reduces manufacturing difficulty.

[0014] Preferably, the bottom end of the fork arm is provided with a second through hole adapted to the axle, the axle is integrally formed with a second limiting ring, the outer side of the bottom cover is provided with a mounting groove adapted to the second limiting ring, and the bottom cover and the fork arm are detachably connected; by adopting this solution, the number of parts is effectively reduced, the assembly complexity is reduced, and the axle can be quickly disassembled and assembled, improving maintenance efficiency, and avoiding the volume redundancy caused by the traditional multi-level fixing method, thus improving the overall lightweight structure.

[0015] Through the above technical solution, this utility model achieves the following beneficial effects: 1. This application reduces the overall size and weight of the structure by integrating the braking components into the wheel cavity of the hub, which meets the requirements of UAVs for lightweight and compact structure, improves the flight performance and endurance of UAVs, and provides greater braking force by using the braking method of friction between the brake shoes and the brake drum, ensuring that the UAV can decelerate and stop quickly and effectively when braking is required. The transmission of the brake cable tension to the brake shoe action is realized through components such as rocker arms and rotating rods. Its structure is simple, has high transmission efficiency, reduces energy loss and the possibility of failure, and is easy to maintain and repair, thus reducing the cost of use. 2. This application can quickly and accurately convert the tension of the brake cable into the frictional force between the brake horseshoe and the brake drum, enabling the UAV to decelerate and stop in a short time, improving braking efficiency, ensuring uniform distribution of braking force, reducing vibration and shaking during braking, making the UAV braking smoother and more reliable, and improving flight safety. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a perspective view of the UAV brake wheel described in a specific embodiment of this application; Figure 2 This is a perspective view of the UAV brake wheel described in a specific embodiment of this application; Figure 3 for Figure 1 The diagram shows a front view sectional view of the UAV's brake wheel. Figure 4 for Figure 3 The diagram shown is a structural schematic of the drone's brake wheel. Figure 5 for Figure 3 The diagram shows the assembly of the brake shoes in the brake wheel of the UAV. Figure 6 for Figure 5 The diagram shows the structure of the rotating rod in the brake shoe; Figure 7 for Figure 5 A schematic diagram of the brake element in the brake shoe is shown. Explanation of reference numerals in the attached figures: 1. Fork arm; 101. Second through hole; 2. Wheel axle; 201. Second limit ring; 3. Hub; 3A. Half body; 301. Wheel cavity; 31. Wheel core; 3101. Mounting channel; 3102. Receiving groove; 32. Web plate; 33. Wheel rim; 3301. Ring groove; 4. Tires; 5. Bottom cover; 501. First through hole; 502. Mounting groove; 6. Brake drum; 7. Brake shoe; 71. Brake body; 711. Brake shoe; 7111. Rotating groove; 72. Support pin; 73. Rotating rod; 7301. First limit ring; 8. Rocker arm; 9. Limiting block; 901. Limiting hole; 10. Bearings. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0019] The terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as “first” or “second” may explicitly or implicitly include one or more of the stated features.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral 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 utility model according to the specific circumstances.

[0021] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0022] Example: like Figure 1 As shown in the figure, this application discloses a UAV brake wheel for rapidly and effectively decelerating the UAV during landing, so that the UAV can stop safely within a limited runway. It has the advantages of simplified structure, compact size, light weight and excellent braking performance. The specific structure includes: fork arm 1, wheel axle 2, wheel hub 3, tire 4, bottom cover 5, brake drum 6, brake shoe 7 and rocker arm 8.

[0023] The fork arm 1 is the support structure for the brake wheel, preferably in the shape of a "Y". It serves to support and fix other components, and is used to fix the wheel to the landing gear of the UAV. When braking, it bears the huge reaction force generated by braking, ensuring that the wheel maintains a stable position and does not wobble or deviate.

[0024] For example, to meet the needs of lightweight design, multiple hollow slots can be opened on the fork arm 1, thereby significantly reducing the overall weight.

[0025] The axle 2 is mounted laterally at the bottom of the fork arm 1. It has a cylindrical structure, which serves as a support and the central axis for the rotation of the hub 3.

[0026] The hub 3 is rotatably mounted on the axle 2, and has an annular cavity 301 on one side, with a depth of two-thirds of the thickness of the hub 3. This cavity provides an installation location for the braking system and integrates braking components such as the brake drum 6, making the entire braking system structure compact.

[0027] The tire 4 is mounted on the outside of the hub 3 and is in direct contact with the ground. It is used to enable the movement and braking of the drone and is preferably made of rubber material.

[0028] The bottom cover 5 is fixedly mounted on the wheel axle 2 and seals the wheel cavity 301. It has a disc-shaped structure and is used to provide a relatively closed and clean working environment for the brake drum 6, brake shoe 7 and other components inside the wheel cavity 301. At the same time, it can also play a supporting and fixing role, enhancing the structural stability.

[0029] The brake drum 6 is fixedly mounted on the inner circumference of the wheel cavity 301. It has a cylindrical structure. During braking, its inner surface comes into close contact with the brake shoe 7 to generate friction, thereby converting the kinetic energy of the UAV into heat energy, thus achieving the purpose of deceleration and stopping.

[0030] Brake shoe 7 is located inside brake drum 6, and specifically includes: Braking body 71 is a component that directly contacts the brake drum 6 to generate friction. The support pin 72 is a cylindrical structure. One end of it is connected to the brake body 71, and the other end passes through the wheel cavity 301. It plays the role of supporting and positioning the brake body 71, so that the brake body 71 can make a circular motion around the support pin 72 during braking. The rotating rod 73 is located below the wheel axle 2. One end is connected to the brake body 71 for transmission, and the other end passes through the bottom cover 5 and forms a rotational engagement with the bottom cover 5. It is used to transmit power to the brake body 71, thereby driving the brake body 71 to rotate around the support pin 72, so that the brake body 71 contacts the brake drum 6 to realize the braking function.

[0031] The rocker arm 8 has one end connected to the end of the rotating rod 73 located outside the bottom cover 5, and the other end connected to the brake cable. It is used to convert the linear motion of the brake cable into the rotational motion of the rotating rod 73. When the brake cable is pulled, the rocker arm 8 rotates around the connection point between it and the rotating rod 73, thereby triggering the action of the brake shoe 7 to achieve braking of the drone.

[0032] This invention integrates the braking components into the wheel cavity 301 of the hub 3, reducing the overall size and weight of the structure, meeting the requirements of UAVs for lightweight and compact structures, and improving the flight performance and endurance of the UAV. Furthermore, the braking method of friction between the brake shoe 7 and the brake drum 6 can provide greater braking force, ensuring that the UAV can decelerate and stop quickly and effectively when braking is required. The transmission of the brake cable tension to the brake shoe 7 is achieved through components such as the rocker arm 8 and the rotating rod 73. Its structure is simple, the transmission efficiency is high, energy loss and the possibility of failure are reduced, and it is easy to maintain and repair, thus reducing the cost of use.

[0033] In some embodiments, such as Figure 6 and Figure 7 As shown, the braking body 71 includes: Two horseshoes 711 are semi-circular rings arranged opposite each other inside the brake drum 6 to match the shape of the inner surface of the brake drum 6, so as to make full contact with the inner surface of the brake drum 6 during braking, thereby increasing the friction area and improving the braking effect. The upper mating surface of the shoe 711 is provided with a rotating groove 7111 that is adapted to the support pin 72. This groove provides a precise track for the shoe 711 to move around the support pin 72 during braking, ensuring that the shoe 711 can move along the predetermined trajectory and that the contact position between the two remains accurate. The end of the rotating rod 73 located inside the bottom cover 5 is flat and fits between the lower mating surfaces of the two shoes 711. This design ensures uniform force transmission and prevents the shoe 711 from deforming or being damaged due to uneven force, thus improving reliability and stability.

[0034] When in a non-braking state, the two shoe horses 711 will retract inward around the support pin 72 under the influence of gravity, as they are only affected by their own weight. At this time, there is a certain gap between the shoe horses 711 and the inner surface of the brake drum 6, which ensures that the shoe horses 711 will not rub against the brake drum 6 during normal flight and gliding of the UAV, thereby avoiding non-braking wear, extending the service life of the braking components, reducing maintenance costs, reducing energy consumption, and improving the flight efficiency and endurance of the UAV.

[0035] When braking is required, the brake cable is pulled, which drives the rotating rod 73 to rotate via the rocker arm 8. The flat end of the rotating rod 73 applies a force to the lower mating surface of the shoe 711, causing the two shoes 711 to overcome their own weight and expand outward around the support pin 72, gradually contacting the inner surface of the brake drum 6 and generating friction, thereby realizing the braking function.

[0036] Through the above design of the brake body 71, the tension of the brake cable can be quickly and accurately converted into friction between the brake shoe 711 and the brake drum 6, enabling the UAV to decelerate and stop in a short time, improving braking efficiency, ensuring uniform distribution of braking force, reducing vibration and shaking during braking, making the UAV braking more stable and reliable, and improving flight safety.

[0037] Based on the above embodiments, such as Figure 4 As shown, the bottom cover 5 has a first through hole 501 that matches the rotating rod 73, which provides an installation position for the rotating rod 73, ensuring the positioning accuracy during installation and playing a radial limiting role; the rotating rod 73 has an integrally formed first limiting ring 7301 between the brake body 71 and the bottom cover 5, which is used to limit the axial movement of the rotating rod 73, ensuring that it forms a stable transmission fit with the shoe 711, thereby realizing a reliable braking function.

[0038] Through the synergistic effect of the first through hole 501 and the first limiting ring 7301, the axial position and rotational degree of freedom of the rotating rod 73 are precisely controlled, ensuring that the braking system can operate stably and reliably. This avoids problems such as brake failure and uneven braking caused by the axial movement or inflexible rotation of the rotating rod 73, thereby improving the safety and reliability of UAV braking.

[0039] In some embodiments, such as Figure 1 As shown, it includes: The limiting block 9 is located on the outside of the bottom cover 5 and next to the wheel axle 2, and has a limiting hole 901 for the brake cable to pass through.

[0040] For example, the limiting block 9 has an inlet and outlet communicating with the limiting hole 901 on the side away from the bottom cover 5, so that the brake cable can be inserted laterally into the limiting hole 901, thereby improving the installation and adjustment efficiency.

[0041] By setting the brake cable position, the brake cable will not swing or jump significantly during transmission, ensuring that the braking force can be stably transmitted to the brake body 71, thereby enhancing braking stability and achieving a stable and reliable braking effect; it also restrains the brake cable, preventing it from coming off the predetermined position during transmission and improving braking safety.

[0042] In some embodiments, such as Figures 2-4 As shown, the hub 3 includes: The wheel hub 31 is mounted on the wheel axle 2 and can rotate freely around the wheel axle 2, and supports the weight of the entire wheel hub 3; The web plate 32 is fixedly sleeved on the outside of the wheel core 31 and has a disc-shaped structure. It serves to connect the wheel core 31 and the wheel rim 33, increasing the overall rigidity and strength. The rim 33 is fixedly sleeved on the outside of the web 32 and has an annular groove 3301 on its outer periphery for mounting the tire 4, which can withstand various loads transmitted from the tire 4.

[0043] Preferably, the web plate 32 has a plurality of weight-reducing holes evenly arranged around the wheel core 31 to reduce weight while ensuring structural strength, and the weight-reducing holes are connected to the wheel cavity 301, thereby playing a role in heat dissipation.

[0044] The design of hub 3 described above avoids local stress concentration, thereby improving the overall ability to withstand complex loads and exhibiting good deformation resistance; moreover, the structure is simple and compact, with a small overall weight, which improves the payload capacity and flight efficiency of the UAV.

[0045] Based on the above embodiments, such as Figure 3 As shown, it includes: Two bearings 10 are fitted onto the axle 2 at intervals; The wheel core 31 has an installation channel 3101 through which the wheel axle 2 passes, and the two ends of the installation channel 3101 have receiving grooves 3102 for installing the bearing 10.

[0046] Through the above design, the relative rotation between the wheel axle 2 and the wheel core 31 is realized more stably, effectively dispersing the force, reducing wear, improving rotational smoothness and reliability, and providing a precise installation position to ensure the assembly accuracy of each component. This makes the overall structure compact and reasonable, which is conducive to the efficient and stable operation of the wheel and improves the overall performance.

[0047] In this embodiment, as Figure 4 As shown, the hub 3 is composed of two halves 3A joined together, and the two halves 3A are detachably connected.

[0048] For example, the hub 3 is divided into two radially from the web 32, and the web 32 has a plurality of first mounting holes arranged in a circumferentially spaced manner, so that a detachable connection can be achieved by bolt and nut assembly.

[0049] Preferably, a connecting plate is provided on the inner circumference of the brake drum 6 near the web plate 32. The connecting plate has a second mounting hole that corresponds one-to-one with the mounting hole, so that the brake drum 6 and the two halves 3A can be installed and fixed synchronously, which improves the efficiency of disassembly and assembly.

[0050] When installing the wheel hub 3 onto the tire 4, the detachable connection design of the two halves 3A makes the installation process easier; the operator can first position and fix one half 3A to the tire 4, and then install the other half 3A, and firmly join the two halves 3A together through the detachable connection structure.

[0051] The above design enables convenient and efficient installation and disassembly, facilitates maintenance and replacement, reduces maintenance costs and time, simplifies mold design and processing, and reduces manufacturing difficulty.

[0052] In some embodiments, such as Figure 3-4 As shown, the bottom end of the fork arm 1 is provided with a second through hole 101 that is adapted to the wheel axle 2, the wheel axle 2 is integrally formed with a second limiting ring 201, the outer side of the bottom cover 5 is provided with a mounting groove 502 that is adapted to the second limiting ring 201, and the bottom cover 5 and the fork arm 1 are detachably connected.

[0053] Specifically, the second through hole 101 is used to limit the radial displacement of the wheel axle 2 and achieve positioning; the second limiting ring 201 is an annular protrusion extending outward from the surface of the wheel axle 2, which can be integrally formed by turning, and is used to limit the axial displacement of the wheel axle 2; the mounting groove 502 is used to accommodate the second limiting ring 201 and form a mechanical self-locking, and improves the structural compactness; the bottom cover 5 and the fork arm 1 are fixed by bolt connection, which facilitates disassembly and assembly.

[0054] The above design effectively reduces the number of parts, lowers assembly complexity, and enables quick assembly and disassembly of wheel axle 2, improving maintenance efficiency. It also avoids the volume redundancy caused by traditional multi-level fixing methods, thus improving the overall lightweight structure.

[0055] Further explanation regarding this application: During the take-off and landing of the drone, the hub 3, tire 4 and brake drum 6 form a whole and rotate around the axle 2 as the central axis.

[0056] When braking is required, the brake cable pulls the rocker arm 8. Under the action of the tension, the rocker arm 8 rotates around its connection point with the rotating rod 73. Because the rocker arm 8 is designed using the lever principle, it can amplify a small tension into a large rotational torque, which is then transmitted to the rotating rod 73. The rotating rod 73 rotates around its own axis under the action of the torque, and then transmits the rotational motion to the brake body 71 through the transmission connection, causing the brake body 71 to rotate around the support pin 72. After the brake body 71 rotates, its friction material brake surface comes into close contact with the inner surface of the brake drum 6, generating friction. The friction hinders the rotation of the brake drum 6. Since the brake drum 6 is fixed inside the hub 3, and the hub 3 is connected to the tire 4, the friction ultimately acts on the tire 4, slowing down the rotational speed of the tire 4, thereby achieving braking of the drone.

[0057] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A brake wheel for a drone, characterized in that, include: Fork arm; The axle is mounted laterally at the bottom end of the fork arm; The hub is rotatably mounted on the axle, and has an annular cavity on one side. The tire is fitted over the outside of the wheel hub; The bottom cover is fixedly fitted onto the axle and seals the wheel cavity; The brake drum is fixedly fitted onto the inner circumference of the wheel cavity; Brake shoes, disposed inside the brake drum, include: Braking body, A support pin, one end of which is connected to the brake body, and the other end of which passes through the wheel cavity. A rotating rod is arranged below the wheel axle, with one end connected to the brake body and the other end passing through the bottom cover and forming a rotational fit with the bottom cover. The rocker arm has one end connected to the end of the rotating rod located outside the bottom cover, and the other end connected to the brake cable.

2. The UAV brake wheel according to claim 1, characterized in that, The braking element includes: Two horseshoes, in a semi-circular shape, are arranged opposite each other inside the brake drum; The upper mating surface of the horseshoe has a rotating groove adapted to the support pin, and the end of the rotating rod located inside the bottom cover is flat and fits between the lower mating surfaces of the two horseshoes.

3. The UAV brake wheel according to claim 2, characterized in that, The bottom cover has a first through hole adapted to the rotating rod, and the rotating rod has an integrally formed first limiting ring between the brake body and the bottom cover.

4. The UAV brake wheel according to claim 1, characterized in that, include: A limiting block is provided on the outside of the bottom cover and next to the wheel axle, and has a limiting hole for the brake cable to pass through.

5. The UAV brake wheel according to claim 1, characterized in that, The wheel hub includes: The wheel hub is rotatably mounted on the wheel axle; The web plate is fixedly sleeved on the outside of the wheel core; The rim is fixedly fitted outside the web and has annular grooves on its outer periphery for mounting the tire.

6. The UAV brake wheel according to claim 5, characterized in that, include: Two bearings are fitted onto the axle at intervals; The wheel core has an installation channel through which the wheel axle passes, and the two ends of the installation channel have receiving grooves for installing the bearing.

7. The UAV brake wheel according to claim 5, characterized in that, The wheel hub is composed of two halves joined together, and the two halves are detachably connected.

8. The UAV brake wheel according to claim 1, characterized in that, The bottom end of the fork arm is provided with a second through hole that matches the axle. A second limiting ring is integrally formed on the axle. The outer side of the bottom cover is provided with a mounting groove that matches the second limiting ring. The bottom cover and the fork arm are detachably connected.

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