Unmanned aerial vehicle frame and unmanned aerial vehicle of variable configuration

Abstract

The utility model relates to the technical field of unmanned plane, provide a variable configuration's unmanned plane frame and unmanned plane, unmanned plane frame includes two first frame body, two second frame body and first machine arm seat, two first frame body interval arrangement, two second frame body are located between two first frame body between with two first frame body and form the basic frame, first machine arm seat is located in each corner of basic frame, first machine arm seat is connected with adjacent first frame body and second frame body respectively, and first machine arm seat is used for connecting the body machine arm of unmanned plane, wherein, at least one of first frame body and second frame body is detachably connected with second machine arm seat, and second machine arm seat is used for connecting the extension machine arm of unmanned plane, the utility model discloses through detachably connecting second machine arm seat on at least one of first frame body and second frame body, and connecting the extension machine arm on second machine arm seat, and unmanned plane can adjust self configuration according to different task demand to adapt to different load.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a UAV frame with variable configuration and the UAV itself. Background Technology

[0002] Multirotor drones mainly come in four-rotor, six-rotor, and eight-rotor configurations. Different configurations differ in payload capacity, stability, and maneuverability. Quadrotor drones are simple in structure and low in cost, but their payload capacity is relatively weak. Six-rotor and eight-rotor drones have stronger payload capacities, but their structures are relatively complex and their costs are higher.

[0003] In related technologies, multi-rotor drones have been widely used in logistics delivery, agricultural plant protection, and surveying and mapping. However, as operational scenarios extend to narrow spaces (such as pipeline inspection between urban buildings) and complex weather conditions (such as wind power equipment maintenance in mountainous areas), and different payload requirements need to be met, the traditional fixed configuration of drone frames makes drones less maneuverable in narrow spaces and difficult to move flexibly; when facing different payloads, they cannot effectively adjust the airframe structure to optimize flight performance, thus limiting their application scenarios. Utility Model Content

[0004] This invention provides a variable configuration drone frame and drone to address the aforementioned technical deficiencies in the prior art, enabling the drone to quickly adjust its configuration to adapt to different payloads according to different mission requirements.

[0005] The first aspect of this utility model provides a variable configuration unmanned aerial vehicle (UAV) frame, comprising:

[0006] Two primary frames are arranged at intervals;

[0007] Two second frames are located between the two first frames, and together with the two first frames, they form a basic frame.

[0008] The first arm mount is located at each corner of the basic frame. The first arm mount is connected to the adjacent first frame and second frame respectively. The first arm mount is used to connect the main arm of the UAV.

[0009] The first frame and the second frame are detachably connected to a second arm mount, which is used to connect the extended arm of the UAV.

[0010] According to the variable configuration drone frame provided by this utility model, the length of each first frame body is greater than the length of the second frame body;

[0011] Each of the first frames is provided with a mounting position, and the second arm mount is detachably connected to the mounting position.

[0012] The variable configuration drone frame provided by this utility model further includes:

[0013] Two reinforcing frames are spaced apart between the two first frames and are connected to each of the first frames respectively. The positions of the reinforcing frames correspond to the positions of the second boom base.

[0014] According to the variable configuration UAV frame provided by this utility model, each of the reinforcing frames includes:

[0015] Frame body;

[0016] A connector is detachably connected to both ends of the frame body. The cross-sectional area of ​​the connector is larger than that of the frame body. The connector at each end is detachably connected to the corresponding first frame body.

[0017] The variable configuration drone frame provided by this utility model further includes a first adapter component, which is adapted to be folded, and the main body arm is connected to the first arm base through the first adapter component.

[0018] According to the variable configuration UAV frame provided by this utility model, the first adapter component includes:

[0019] The first fixed tube is connected to the first machine arm base;

[0020] The first movable tube is rotatably connected to the first fixed tube, and the first movable tube is used to connect to the main arm of the UAV.

[0021] A first locking member is provided on the first fixed tube and is used to lock the first movable tube.

[0022] According to the variable configuration UAV frame provided by this utility model, the first fixed tube includes a tube body, and the tube body is provided with a plurality of connecting parts spaced apart along the length direction;

[0023] The tube is fitted inside the first boom seat, and each of the connecting parts abuts against the inner wall of the first boom seat and is detachably connected to the first boom seat.

[0024] The variable configuration UAV frame provided by this utility model further includes a second adapter component, the second adapter component comprising:

[0025] The second fixed tube is connected to the second boom base;

[0026] The second movable tube is rotatably connected to the second fixed tube, and the second movable tube is used to connect the extended arm of the UAV;

[0027] The second locking member is provided on the second fixed tube and is used to lock the second movable tube.

[0028] According to the variable configuration UAV frame provided by this utility model, the first arm base includes a base body, and the base body extends outwardly to provide a first connecting arm, a second connecting arm, and a third connecting arm; the central axes of the first connecting arm, the second connecting arm, and the third connecting arm are located in the same plane, and the included angle between the central axes of two adjacent connecting arms is equal; wherein, the main body arm is adapted to be mounted on the first connecting arm, the first frame is connected to the second connecting arm, and the second frame is connected to the third connecting arm;

[0029] or,

[0030] The second boom base includes a frame and a cylinder. The frame is snapped onto the first frame or the second frame and is detachably connected to the first frame or the second frame. The cylinder is fixedly connected to the frame and is arranged perpendicular to the frame. The extended boom is adapted to be mounted on the cylinder.

[0031] A second aspect of this invention provides a drone, which includes a body and a variable-configuration drone frame as described in any one of the claims, the body being mounted on the variable-configuration drone frame.

[0032] The variable-configuration drone frame provided by this utility model allows the drone to quickly adjust its configuration to adapt to different payloads by detachably connecting a second arm mount to at least one of a first frame and a second frame, and then connecting an extension arm to the second arm mount. For light-load missions, only the main arm is used, reducing unnecessary weight and size and improving flight flexibility. For heavy-load missions, the extension arm is installed to increase lift and load-bearing capacity, enabling the drone to carry large equipment, saving on drone purchase costs and improving work efficiency.

[0033] Traditional drones require two different configurations to meet the needs of both light and heavy-load tasks, resulting in high operating costs. However, the variable-configuration drone provided in this invention allows a single drone to be adjusted for different tasks, avoiding the need to manufacture separate drones for light and heavy-load missions. For example, in agriculture, inspecting a field first requires a drone carrying a lightweight camera (light-load mission) to conduct a preliminary check of crop growth, navigating the complex terrain and crops. If more detailed soil testing is needed, requiring heavier soil sampling and analysis equipment (heavy-load mission), the drone can quickly switch configurations to continue performing subsequent tasks in the same field, avoiding the need to alternate between different types of drones, improving work efficiency while saving on purchase costs.

[0034] Furthermore, the drone provided by this utility model, because it includes the aforementioned variable configuration drone frame, possesses all the advantages of the aforementioned variable configuration drone frame. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the 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.

[0036] Figure 1 This is a schematic diagram of the structure of a variable configuration UAV frame (four-arm structure) provided in this embodiment of the utility model.

[0037] Figure 2 This is a top view (four-arm structure) of a variable configuration UAV frame provided in this embodiment of the utility model.

[0038] Figure 3 This is a schematic diagram of the structure of a variable configuration UAV frame (six-arm structure) provided in an embodiment of the present invention.

[0039] Figure 4 This is a structural schematic diagram of the reinforcing frame in the variable configuration UAV frame provided in this embodiment of the utility model.

[0040] Figure 5 This is a schematic diagram of the connection structure between the first adapter component and the first arm mount in the variable configuration UAV frame provided in this embodiment of the utility model.

[0041] Figure 6 This is a schematic diagram of the structure of the first arm mount in the variable configuration UAV frame provided in this embodiment of the utility model.

[0042] Figure 7 This is a schematic diagram of the structure of the first adapter component in the variable configuration UAV frame provided in this embodiment of the utility model.

[0043] Figure 8 This is a schematic diagram of the connection structure between the second adapter component and the second arm mount in the variable configuration UAV frame provided in this embodiment of the utility model.

[0044] Figure 9 This is a schematic diagram of the structure of the second arm mount in the variable configuration UAV frame provided in this embodiment of the utility model.

[0045] Figure 10 This is a schematic diagram of the structure of the second adapter component in the variable configuration UAV frame provided in this embodiment of the utility model.

[0046] Figure label:

[0047] 10. First frame; 11. Installation position;

[0048] 20. Second frame;

[0049] 30. First boom base; 31. Base body; 32. First connecting arm; 33. Second connecting arm; 34. Third connecting arm; 35. First limiting step; 36. Second limiting step;

[0050] 40. Second boom base; 41. Frame; 42. Cylinder;

[0051] 50. Reinforcing frame; 51. Frame body; 52. Connecting parts;

[0052] 60. First adapter component; 61. First fixed tube; 611. Tube body; 612. Connecting part; 62. First movable tube; 63. First locking member;

[0053] 70. Second adapter component; 71. Second fixed tube; 72. Second movable tube; 73. Second locking component; 80. Main arm; 90. Extending arm. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0055] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0056] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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 the embodiments of this application. 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.

[0058] Figure 1 This is a schematic diagram of the structure of a variable configuration UAV frame (four-arm structure) provided in this embodiment of the utility model. Figure 2 This is a top view (four-arm structure) of a variable configuration UAV frame provided in this embodiment of the utility model. Figure 3 This is a schematic diagram of the structure of a variable configuration UAV frame (six-arm structure) provided in an embodiment of the present invention.

[0059] See Figures 1 to 3 This utility model provides a variable configuration drone frame, which includes two first frames 10, two second frames 20 and four first arm mounts 30.

[0060] The first frame 10 and the second frame 20 can be made of lightweight, high-strength aluminum alloy or carbon fiber. The two first frames 10 are elongated and arranged in parallel with each other. The spacing between them is determined according to the overall size design requirements of the UAV. For example, the two first frames 10 can be made of 80*40*3 rectangular carbon fiber tubing.

[0061] The second frame 20 can be long or curved. Both ends of the second frame 20 are connected to the two first frames 10 respectively. Corresponding screw holes are provided at the connection part 612. The second frame 20 can also be made of rectangular carbon fiber tubing.

[0062] The first arm mount 30 can be cast from aluminum alloy. It is installed at the four corners of the base frame. The first arm mount 30 can be fixedly connected to the adjacent first frame 10 and second frame 20, such as by welding or adhesive bonding. Alternatively, it can be detachably connected, such as by riveting or screwing, allowing for easy disassembly and troubleshooting. The first frame 10, second frame 20, and first arm mount 30 are interconnected to form the base frame, serving as the main load-bearing structure of the multi-rotor UAV.

[0063] The second arm mount 40 is detachably connected to at least one of the first frame 10 and the second frame 20. Specifically, the second arm mount 40 can be detachably connected to the first frame 10, the second frame 20, or both simultaneously. The second arm mount 40 is used to connect the drone's extension arm 90, allowing for configuration changes to the drone's frame by removing the second arm mount 40 from at least one of the first frame 10 and the second frame 20. When the extension arm 90 needs to be installed, it is mounted on the second arm mount 40 and connected to the drone's power system, control system, etc., such as power lines and signal transmission lines.

[0064] It should be noted that both the main arm 80 and the extended arm 90 are made of carbon fiber to reduce weight, and their lengths are determined based on the design flight performance of the UAV. Furthermore, both the main arm 80 and the extended arm 90 can use 2mm thick variable-diameter carbon tubing with an outer diameter of 50mm to 60mm. During manufacturing, the main arm 80 and the extended arm 90 have different lengths, which can be shortened to the specified length using the same mold.

[0065] For example, when the drone needs to fly in a lightly loaded and confined space, such as for simple environmental monitoring tasks indoors, there is no need to extend the arms 90. The drone relies on its four main arms 80 connected to the first arm mount 30 on the basic frame to provide the lift and attitude control required for flight.

[0066] The drone's flight control system adjusts the motor speeds on its four main arms 80 based on a preset flight path and sensor feedback (such as indoor spatial layout and obstacle positions), enabling the drone to perform flexible turning, ascent, and descent. Because there is no additional weight or bulk from the extended arms 90, the drone can fly more agilely in confined spaces, such as easily navigating narrow passages or conducting comprehensive monitoring within compact rooms.

[0067] For example, when heavy-load tasks are required, such as carrying large monitoring equipment in complex outdoor environments (e.g., mountainous areas, seaside locations), the operator first installs the extended arm 90 onto the second arm mount 40. After the extended arm 90 is installed, the entire UAV system is reconfigured, including adjusting the parameters of the flight control system to adapt to the new center of gravity and aerodynamic characteristics. Then, the heavy-load equipment, such as large high-definition cameras and meteorological monitoring instruments, is installed on the UAV.

[0068] During flight, the extended arm 90 provides greater lift and allows the drone to maintain a more stable flight attitude under complex weather conditions, such as strong winds and unstable airflow. The flight control system coordinates the rotational speeds of the motors on the main arm 80 and the extended arm 90 based on information from sensors (such as anemometers and gyroscopes) to ensure the drone operates safely and stably under heavy-load and complex conditions.

[0069] It is understood that the variable-configuration UAV frame provided in this embodiment of the invention, by detachably connecting a second arm mount 40 to at least one of the first frame 10 and the second frame 20, and connecting an extension arm 90 to the second arm mount 40, allows the UAV to quickly adjust its configuration to adapt to different loads according to different mission requirements, achieving multi-purpose functionality and reducing design cycle and manufacturing costs. For light-load missions, the number of arms is reduced, using only the main arm 80, reducing unnecessary weight and volume, improving flight flexibility, and increasing flight time requirements. For heavy-load missions, the extension arm 90 is installed, and equipped with motors and propellers, increasing lift and load-bearing capacity, enabling the carrying of large equipment for operations, saving on UAV purchase costs, and improving work efficiency.

[0070] Traditional drones require two different configurations to meet the needs of both light and heavy-load tasks, resulting in high operating costs. However, the variable-configuration drone provided in this invention allows a single drone to be adjusted for different tasks, avoiding the need to manufacture separate drones for light and heavy-load missions. For example, in agriculture, inspecting a field first requires a drone carrying a lightweight camera (light-load mission) to conduct a preliminary check of crop growth, navigating the complex terrain and crops. If more detailed soil testing is needed, requiring heavier soil sampling and analysis equipment (heavy-load mission), the drone can quickly switch configurations to continue performing subsequent tasks in the same field, avoiding the need to alternate between different types of drones, improving work efficiency while saving on purchase costs.

[0071] Continue reading Figures 1 to 3 In some embodiments of this utility model, the length of each first frame 10 is greater than the length of the second frame 20, which means that the basic frame formed by the interconnection of the first frame 10, the second frame 20, and the first boom base 30 is rectangular. Each first frame 10 is provided with a mounting position 11, and the second boom base 40 is detachably connected to the mounting position 11, which means that the boom is extended along the long side of the rectangular basic frame.

[0072] Because rectangular structures offer good geometric stability, with right angles at their four corners, the force distribution is relatively uniform. During drone flight, especially when facing airflow disturbances or maneuvers, the rectangular base frame can better resist torsional and deformation forces.

[0073] For example, when a drone flies in strong winds, the rectangular frame can distribute the wind force from all directions to each frame and arm base, reducing the situation of excessive local stress and thus ensuring the overall structural stability of the drone.

[0074] Extending the drone's arms along the long side of the rectangular base frame—specifically, by connecting the second arm mount 40 to the mounting position 11 on the first frame 10 (long side)—helps optimize the drone's center of gravity distribution. From a structural mechanics perspective, extending the drone's arms along the long side effectively increases the length of the lifting arm without disrupting the original structural balance.

[0075] When the drone carries a heavy load, the lift generated by the extended arm 90 can be more effectively coordinated with the structure of the basic frame, reducing instability caused by center of gravity shift and further enhancing the flight stability of the drone under heavy load conditions.

[0076] Continue reading Figures 1 to 3, in some embodiments of the present utility model, the variable configuration UAV frame further includes two reinforcing frames 50, which are arranged at intervals between the two first frames 10 and are respectively connected to each first frame 10. The position of the reinforcing frame 50 corresponds to the position of the second arm base 40.

[0077] Equivalently, the reinforcing frame 50 divides the rectangular basic frame into a structure in the shape of a Chinese character "mu". This division method changes the stress distribution pattern of the fuselage. In a traditional rectangular fuselage structure, stress is prone to concentrate on certain weak parts, especially when bearing large loads or complex external forces, elastic deformation is likely to occur. The "mu" structure enables the stress to be more evenly distributed in each part, enabling each part to provide support and strengthening to other parts. For example, when the UAV is flying and is subjected to forces from different directions (such as horizontal wind force, vertical gravity, and inertial force during maneuvering flight), each small area in the "mu" structure (divided by the first frame 10, the second frame 20, the reinforcing frame 50, etc.) can share the stress in different directions, avoiding excessive concentration of stress in a certain local area, thereby reducing the elastic deformation of the fuselage and improving the overall strength of the fuselage. When the UAV performs complex tasks or flies in a harsh environment, this improvement in overall strength can ensure the integrity of the UAV frame and reduce the risk of flight failures caused by frame deformation.

[0078] When the UAV with a variable configuration UAV frame is in a flight state, especially when performing some tasks that require a large pulling force, such as carrying heavy goods or flying in a strong wind environment, the arms will be subjected to a large pulling force. The two reinforcing frames 50 are arranged at intervals between the two first frames 10 and are connected to the first frames 10, and their positions correspond to the second arm base 40. When the extended arm 90 is connected to the second arm base 40, through the reinforcing frame 50, the extended arms 90 on both sides of the fuselage are structurally connected into a straight line, which is beneficial to the effective transmission of the pulling force in the structure.

[0079] For example, when one side of the UAV arm is subjected to a large lateral pulling force (such as the pulling force generated by centrifugal force during turning), due to the presence of the reinforcing frame 50, the pulling force can be quickly transmitted to the structure on the other side through the reinforcing frame 50, enabling the entire fuselage to maintain overall stability in the Z-axis direction, avoiding the unbalanced situation where one side is deformed while the other side is not deformed, and improving the reliability of the UAV structure under complex loading conditions.

[0080] Figure 4 It is a schematic structural diagram of the reinforcing frame 50 in the variable configuration UAV frame provided by the embodiments of the present utility model.

[0081] Refer to Figure 4In some embodiments of this utility model, each reinforcing frame 50 includes a frame body 51 and a connector 52. The connector 52 is detachably connected to both ends of the frame body 51. The cross-sectional area of ​​the connector 52 is larger than the cross-sectional area of ​​the frame body 51. Each end of the connector 52 is detachably connected to the corresponding first frame 10, thereby giving the reinforcing frame 50 better scalability and versatility. The frame body 51 can be made of 30*20*2 rectangular carbon fiber tubing.

[0082] The cross-sectional area of ​​the connector 52 is larger than that of the frame body 51. This design plays a crucial role in stress dispersion at the structural connection 612. When the UAV is subjected to various forces during flight, such as aerodynamic forces, its own weight, and the forces generated by the payload, the connector 52 with its larger cross-sectional area can more evenly transmit the forces from the first frame 10 to the frame body 51.

[0083] For example, when the drone takes off and lands, it generates a large impact force. The connector 52 can act as a "buffer zone" to distribute the impact force over a larger area, preventing excessive local stress on the frame body 51, thereby improving the load-bearing capacity of the entire reinforced frame 50 and helping to maintain the stability of the drone's fuselage structure.

[0084] Since the connector 52 mainly undertakes the functions of connection and stress distribution, it is designed as a structure with a large cross-sectional area, while the frame body 51 has a relatively small cross-sectional area. This allows for optimized use of materials while meeting structural strength requirements.

[0085] For example, high-strength but relatively expensive materials can be used for connector 52, which will not significantly increase costs due to its small size (although the cross-sectional area is large, the length may be short); while the frame body 51 can use more economical materials, as long as it meets its functional requirements in the structure. This material selection and design based on the functional requirements of different components helps to save material costs while ensuring the overall structural strength of the UAV fuselage.

[0086] Additionally, it should be noted that when expanding to a six-axis boom, the frame body 51 is glued to the connector 52, and the connector 52 is connected to the first frame body 10 and the second boom base 40 using M6*55 screws. An M6 threaded hole is also provided on the side wall of the connector 52 for connecting emergency parachute lines. In emergency situations, the parachute lines are held at four points inside the fuselage to prevent the propeller from cutting them.

[0087] Figure 5 This is a schematic diagram of the connection structure between the first adapter component 60 and the first arm base 30 in the variable configuration drone frame provided in this embodiment of the utility model. Figure 6This is a schematic diagram of the structure of the first arm mount 30 in the variable configuration UAV frame provided in this embodiment of the utility model. Figure 7 This is a schematic diagram of the structure of the first adapter component 60 in the variable configuration UAV frame provided in this embodiment of the utility model.

[0088] Continue reading Figures 5 to 7 In some embodiments of this utility model, the variable configuration drone frame further includes a first adapter 60, which is adapted to be folded, and the main body arm 80 is connected to the first arm base 30 through the first adapter 60.

[0089] The first adapter 60 is foldable so that the main body arm 80 can be folded via the first adapter 60 when the drone is not in use or when it needs to be transported or stored.

[0090] For example, in military applications, when drones need to be transported to combat zones, the folded main arm 80 can significantly reduce the overall space occupied by the drone, making it easier to load multiple drones into limited transport vehicles (such as helicopters, armored vehicles, etc.). In the civilian sector, for some small drone enthusiasts or commercial users, the folded drone is easier to store in smaller storage spaces, such as a regular car trunk or a small storage box.

[0091] Furthermore, the folding function of the first adapter 60 gives the connection structure between the main body arm 80 and the first arm base 30 greater flexibility. When the drone needs to pass through narrow passages or fly in complex spatial structures, such as when conducting inspection tasks between skyscrapers in a city or inside complex building structures, the foldable main body arm 80 can adjust its angle according to the actual situation to avoid collisions with obstacles.

[0092] Continue reading Figure 7 In some embodiments of this utility model, the first adapter 60 includes a first fixed tube 61, a first movable tube 62, and a first locking member 63.

[0093] The first fixed tube 61 is connected to the first arm base 30. The first fixed tube 61 can be made of high-strength aluminum alloy, which has good mechanical properties and light weight. Multiple screw holes are provided at one end connected to the first arm base 30 for tight connection by bolts, and a circular rotating shaft is provided at the other end for rotatable connection with the first movable tube 62.

[0094] The first movable tube 62 can be made of aluminum alloy or carbon fiber composite material, which has both high strength and good flexibility. One end of the first movable tube 62 is designed as a semi-circular groove that matches the rotation axis of the first fixed tube 61. The groove is inlaid with a wear-resistant polytetrafluoroethylene bushing to reduce friction during rotation. A connection interface is provided at the end that connects to the main body arm 80. The shape of the connection interface is adapted to the end of the main body arm 80, and a secure connection can be made by means of slots and bolts.

[0095] A first locking member 63 is disposed on the first fixed tube 61 and is used to lock the first movable tube 62. The first locking member 63 may be made of stainless steel and includes a threaded locking rod and a rotatable handle. The locking rod passes through a threaded hole on the first fixed tube 61, and when the handle is rotated, the locking rod can extend into the corresponding locking hole on the first movable tube 62, thereby realizing the locking function.

[0096] When the drone is ready to take off and perform a mission, the main arm 80 must first be deployed. The operator holds the main arm 80 and rotates the first movable tube 62 outward around the rotation axis of the first fixed tube 61 until the main arm 80 reaches the predetermined deployment angle. This predetermined angle can be determined according to the design requirements and mission needs of the drone. For example, in a regular flight mission, it may be an angle that is horizontal or slightly tilted upward relative to the first arm mount 30.

[0097] Then, the operator rotates the handle of the first locking member 63, causing the locking rod to extend into the locking hole of the first movable tube 62, thus firmly locking the first movable tube 62 in the predetermined position. In this way, the main body arm 80 is stably connected to the first arm base 30 through the first adapter 60, and the UAV can take off normally to perform its mission.

[0098] When the drone completes its mission and needs to be stored or transported, the operator first rotates the handle of the first locking member 63 in the opposite direction to unscrew the locking rod from the locking hole of the first movable tube 62, thus releasing the locking state. The operator then holds the main arm 80 and rotates the first movable tube 62 around the rotation axis towards the first arm base 30 until the main arm 80 is folded to its minimum size. For example, the main arm 80 can be folded to a position parallel or nearly parallel to the first arm base 30, which minimizes the overall size of the drone for easy storage or transport.

[0099] Continue reading Figure 7In some embodiments of this utility model, the first fixed tube 61 includes a tube body 611, and the tube body 611 is provided with a plurality of connecting parts 612 at intervals along the length direction; wherein, the tube body 611 is sleeved inside the first arm seat 30, and each connecting part 612 abuts against the inner wall of the first arm seat 30 and is detachably connected to the first arm seat 30 respectively.

[0100] The multi-connection-point design enables a more stable connection between the tube body 611 and the first arm base 30. Compared to a single connection point, multiple connection parts 612 can distribute various forces (such as tension, pressure, torque, etc.) from the main arm 80.

[0101] For example, when the UAV performs maneuvers or encounters airflow disturbances during flight, the main arm 80 will apply complex forces to the first fixed tube 61. Multiple connecting parts 612 can evenly transmit these forces to the first arm base 30, reducing the situation of excessive local stress, thereby enhancing the stability of the entire connection structure and ensuring the structural integrity of the UAV during flight.

[0102] The tube 611 is fitted inside the first boom base 30, creating a nested relationship between the tube 611 and the first boom base 30. This nesting relationship increases the rigidity of the entire connection structure. When subjected to external forces, the tube 611 and the first boom base 30 can support each other and jointly resist deformation.

[0103] For example, during the takeoff and landing of the drone, a large impact force is generated. The structure of the tube body 611 fitted inside the first arm base 30 can effectively resist the deformation risk caused by this impact force, making the drone arm connection 612 more stable and reducing flight failures caused by structural deformation.

[0104] Each connector 612 is detachably connected to the first boom base 30, facilitating maintenance and component replacement. If any part of the tube 611 or the first boom base 30 is damaged during use, maintenance personnel can easily disassemble the connector 612 and replace the damaged component individually without requiring extensive disassembly and reassembly of the entire boom connection structure.

[0105] Continue reading Figure 6In some embodiments of this utility model, the first arm base 30 includes a base body 31, from which a first connecting arm 32, a second connecting arm 33, and a third connecting arm 34 extend outward. The central axes of the first connecting arm 32, the second connecting arm 33, and the third connecting arm 34 are located in the same plane, and the included angle between the central axes of adjacent connecting arms is equal, so that the forces on the components connected to each connecting arm (the first frame 10, the second frame 20, and the first fixing tube 61) can be evenly distributed on the base body 31. For example, when the UAV is subjected to forces from different directions during flight (such as aerodynamic forces, its own weight, or the force generated by the load), these forces will be transmitted to the corresponding connecting arms through the first frame 10, the second frame 20, and the first fixing tube 61. Due to the symmetrical distribution of the connecting arms, the forces are evenly distributed to the base body 31, avoiding excessive local stress on the base body 31 and thus preventing structural damage, thereby improving the stability of the entire structure.

[0106] The first frame 10 is connected to the first connecting arm 32, the second frame 20 is connected to the second connecting arm 33, and the first fixing tube 61 is connected to the third connecting arm 34.

[0107] During flight, the UAV may encounter various complex airflow conditions, which can generate torsional forces on the arms. Due to the symmetrical layout of the three connecting arms (first connecting arm 32, second connecting arm 33, and third connecting arm 34) of the first arm mount 30, when a component on one connecting arm is subjected to a torsional force, the other two connecting arms can balance and resist the torsion. For example, when the first frame 10 is subjected to a torsional force, the torsional force transmitted to the base 31 through the first connecting arm 32 will be balanced by the second connecting arm 33 and the third connecting arm 34, thereby enhancing the torsional resistance of the first arm mount 30 and ensuring the stability of the UAV structure under complex stress conditions.

[0108] Continue reading Figure 6 In some embodiments of this utility model, a first limiting step 35 is provided between the first connecting arm 32 and the base 31, a first frame 10 is sleeved on the first connecting arm 32, the end face of the first frame 10 abuts against the first limiting step 35, and the surface of the first frame 10 is flush with the surface of the base 31. A second limiting step 36 is provided between the second connecting arm 33 and the base 31, a second frame 20 is sleeved on the second connecting arm 33, the end face of the second frame 20 abuts against the second limiting step 36, and the surface of the second frame 20 is flush with the surface of the base 31.

[0109] The first limiting step 35 and the second limiting step 36 provide precise positioning and limiting for the first frame 10 and the second frame 20. When the first frame 10 is fitted onto the first connecting arm 32, its end face abuts against the first limiting step 35, ensuring that the first frame 10 is accurately positioned and fixed on the first connecting arm 32, preventing axial displacement due to external forces during use. Similarly, the second frame 20 can also be precisely positioned and limited on the second connecting arm 33 through the second limiting step 36, thereby ensuring the stability of the entire structure.

[0110] The first frame 10 and the second frame 20 are connected to the first connecting arm 32 and the second connecting arm 33 respectively through the cooperation of the sleeve and the limiting step, forming a stable connection. This connection method can effectively transmit force and torque, enabling the first frame 10 and the second frame 20 to work better with the foundation 31 when subjected to external forces, thereby improving the load-bearing capacity and deformation resistance of the entire structure.

[0111] Furthermore, the surfaces of the first frame 10 and the second frame 20 are flush with the surface of the base 31, making installation and use more convenient. For example, when installing other components, they can be placed directly on the flush surface without additional adjustments or processing, improving installation efficiency. At the same time, during use, the flush surface also helps reduce stress concentration and wear, extending the service life of the components.

[0112] It should be noted that the first frame 10 and the first connecting arm 32 are detachably or fixedly connected; the second frame 20 and the second connecting arm 33 are also detachably or fixedly connected. The detachable connection method makes maintenance and replacement more convenient. When the first frame 10 or the second frame 20 is damaged, it only needs to be removed from the connecting arm and a new part replaced, without the need for large-scale disassembly and reassembly of the entire structure, thus reducing maintenance costs and difficulty.

[0113] Figure 8 This is a schematic diagram of the connection structure between the second adapter component 70 and the second arm mount 40 in the variable configuration UAV frame provided in this embodiment of the utility model. Figure 9 This is a schematic diagram of the structure of the second arm mount 40 in the variable configuration UAV frame provided in this embodiment of the utility model. Figure 10 This is a schematic diagram of the structure of the second adapter component 70 in the variable configuration UAV frame provided in this embodiment of the utility model.

[0114] Continue reading Figures 8 to 10 In some embodiments of this utility model, the variable configuration drone frame further includes a second adapter component 70, which includes a second fixed tube 71, a second movable tube 72, and a second locking component 73.

[0115] The second fixed tube 71 is connected to the second arm base 40; the second movable tube 72 is rotatably connected to the second fixed tube 71, and the second movable tube 72 is used to connect the extended arm 90 of the UAV; the second locking member 73 is provided on the second fixed tube 71 and is used to lock the second movable tube 72.

[0116] It should be noted that the second movable tube 72 has the same structure as the first movable tube 62, and the second locking member 73 has the same structure as the first locking member 63. Please refer to the above description and working process for details. The second fixed tube 71 has a slightly different structure from the first fixed tube 61. The second fixed tube 71 is a tubular structure that adapts to the structure of the second arm base 40.

[0117] Continue reading Figure 9 In some embodiments of this utility model, the second boom base 40 includes a frame 41 and a cylinder 42. The frame 41 is secured to the first frame 10 or the second frame 20 and is detachably connected to the first frame 10 or the second frame 20. The cylinder 42 is fixedly connected to the frame 41 and is arranged perpendicularly to the frame 41. The vertical structure increases the structural strength of the entire second boom base 40.

[0118] When the extended arm 90 is connected to the cylinder 42 and bears a load, the cylinder 42 can effectively transfer the force to the frame 41, and then the frame 41 distributes it to the first frame 10 or the second frame 20, avoiding structural damage caused by excessive local stress. The cylinder 42 is used to connect the extended arm 90 of the UAV.

[0119] The frame 41 has a rectangular structure with an opening on one side forming a slot. The size of the slot matches the shape of the first frame 10 or the second frame 20. The frame 41 has screw holes for detachable connection to the first frame 10 or the second frame 20 via bolts.

[0120] The cylinder 42 is cylindrical and hollow inside, and its inner diameter is determined according to the connection requirements of the extension arm 90. A connecting thread is provided at the end of the cylinder 42 for threaded connection with the extension arm 90. Reinforcing ribs are provided on the exterior of the cylinder 42 to improve its strength and rigidity.

[0121] When the second arm base 40 needs to be installed, first align the frame body 41 with the first frame body 10 or the second frame body 20. The operator inserts the card slot of the frame body 41 into the first frame body 10 or the second frame body 20, ensuring that the card slot has a transitional fit with the frame body, completely wrapping three sides of the frame body, and reducing the deformation of the frame body in the Z direction; then, use bolts to pass through the screw holes at the four corners of the frame body 41 to firmly connect the frame body 41 with the first frame body 10 or the second frame body 20. Next, insert one end of the extended arm 90 into the cylinder body 42. If the end of the extended arm 90 has a thread matching the connection thread of the cylinder body 42, rotate the extended arm 90 to make the two thread connections tight; if other connection methods (such as snap fasteners, etc.) are used, then connect the extended arm 90 with the cylinder body 42 according to the corresponding connection operation.

[0122] In addition, when it is necessary to increase the mission payload of the drone (such as additional sensors, cameras, etc.), the function of the drone can be easily expanded by connecting the extended arm 90 to the cylinder body 42, without the need for large-scale modification of the basic structure of the drone.

[0123] Therefore, the variable-configuration drone frame provided by the embodiment of the present utility model has a simple overall structure, and the variable arm assembly (the second arm base 40, the second adapter 70, and the extended arm 90) is convenient to disassemble and assemble, with low maintenance costs. The entire drone frame can be mutually converted between a four-axis basic version, an enhanced version (with a strengthened frame body 50), and a six-axis version, and can be used for different loads and working conditions, enabling the drone to quickly switch between flexible flight in a light-load narrow space and stable operation in a heavy-load complex working condition.

[0124] Since the drone frame is symmetric about both the X-axis and the Y-axis, and the center of gravity and the center of the fuselage are both on the Z-axis, it is beneficial to improve the stability of the drone. The extended arms 90 on both sides of the fuselage are connected into a straight line through the strengthened frame body 50, effectively transmitting the tensile force and preventing plastic deformation in the Z-axis direction; and the basic frame is divided into a "mesh" structure through the strengthened frame body 50, reducing the elastic deformation of the fuselage while improving the overall strength of the fuselage.

[0125] In addition, the materials used for the drone frame are mainly composed of carbon fiber and aluminum alloy, with high strength and light weight, achieving the lightweight design of the drone and effectively improving the flight time. In addition, each arm can be folded, which not only ensures that the wheelbase in the unfolded state is sufficient to adapt to a more powerful power system and provides sufficient power for the drone, but also saves space in the folded state, facilitating storage and transportation and realizing the vehicle-mounted mobile function.

[0126] The embodiment of the present utility model also provides a drone, which includes a fuselage and the variable-configuration drone frame according to any one of the above, and the fuselage is arranged on the variable-configuration drone frame. The variable-configuration drone frame can be quickly adjusted according to different mission requirements.

[0127] 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 this 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A variable-configuration unmanned aerial vehicle (UAV) frame, characterized in that, include: Two primary frames are arranged at intervals; Two second frames are located between the two first frames, and together with the two first frames, they form a basic frame. The first arm mount is located at each corner of the basic frame. The first arm mount is connected to the adjacent first frame and second frame respectively. The first arm mount is used to connect the main arm of the UAV. The first frame and the second frame are detachably connected to a second arm mount, which is used to connect the extended arm of the UAV.

2. The variable configuration UAV frame according to claim 1, characterized in that, The length of each of the first frames is greater than the length of the second frame; Each of the first frames is provided with a mounting position, and the second arm mount is detachably connected to the mounting position.

3. The variable configuration UAV frame according to claim 2, characterized in that, Also includes: Two reinforcing frames are spaced apart between the two first frames and are connected to each of the first frames respectively. The positions of the reinforcing frames correspond to the positions of the second boom base.

4. The variable configuration UAV frame according to claim 3, characterized in that, Each of the aforementioned reinforcing frames includes: Frame body; A connector is detachably connected to both ends of the frame body. The cross-sectional area of ​​the connector is larger than that of the frame body. The connector at each end is detachably connected to the corresponding first frame body.

5. The variable configuration UAV frame according to any one of claims 1 to 4, characterized in that, It also includes a first adapter component, which is adapted to be folded, and the main arm is connected to the first arm base through the first adapter component.

6. The variable configuration UAV frame according to claim 5, characterized in that, The first adapter component includes: The first fixed tube is connected to the first machine arm base; The first movable tube is rotatably connected to the first fixed tube, and the first movable tube is used to connect to the main arm of the UAV. A first locking member is provided on the first fixed tube and is used to lock the first movable tube.

7. The variable configuration UAV frame according to claim 6, characterized in that, The first fixed tube includes a tube body, and the tube body is provided with a plurality of connecting parts at intervals along its length; The tube is fitted inside the first boom seat, and each of the connecting parts abuts against the inner wall of the first boom seat and is detachably connected to the first boom seat.

8. The variable configuration UAV frame according to any one of claims 1 to 4, characterized in that, It also includes a second adapter component, the second adapter component comprising: The second fixed tube is connected to the second boom base; The second movable tube is rotatably connected to the second fixed tube, and the second movable tube is used to connect the extended arm of the UAV; The second locking member is provided on the second fixed tube and is used to lock the second movable tube.

9. The variable configuration UAV frame according to any one of claims 1 to 4, characterized in that, The first arm base includes a base body, from which a first connecting arm, a second connecting arm, and a third connecting arm extend outward; the central axes of the first connecting arm, the second connecting arm, and the third connecting arm are located in the same plane, and the included angles between the central axes of adjacent connecting arms are all equal; wherein, the main arm is adapted to be mounted on the first connecting arm, the first frame is connected to the second connecting arm, and the second frame is connected to the third connecting arm; or, The second boom base includes a frame and a cylinder. The frame is snapped onto the first frame or the second frame and is detachably connected to the first frame or the second frame. The cylinder is fixedly connected to the frame and is arranged perpendicular to the frame. The extended boom is adapted to be mounted on the cylinder.

10. A drone, characterized in that, It includes a body and a variable configuration drone frame as described in any one of claims 1 to 9, wherein the body is disposed on the variable configuration drone frame.

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