Mortise structure unmanned aerial vehicle frame and six-rotor unmanned aerial vehicle

Abstract

The utility model provides a kind of mortise and tenon structure unmanned aerial vehicle rack and six-rotor unmanned aerial vehicle, including fuselage, machine arm and landing gear, the fuselage is hexagonal, the machine arm is one-to-one correspondence and is set in the corner end of fuselage, the landing gear is connected in the below of fuselage, the fuselage includes the first triangular frame and the second triangular frame of corner end mutual staggered connection, the first triangular frame includes multiple first connecting rods connected in turn, the second triangular frame includes multiple second connecting rods connected in turn;The first connecting rod and second connecting rod are equipped with tenon and mortise of mutual mortise and tenon cooperation, the first connecting rod and second connecting rod are mortise and tenon connected in the way that the tenon of a connecting rod is embedded in the mortise of another connecting rod, by adopting the mode of mortise and tenon connection between two triangular frames, at least the assembly of fuselage does not need connecting accessories, avoid connecting accessories to occupy space, increase fuselage weight, improve the assembly efficiency of rack, reduce production cost.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle technology, specifically to a tenon-and-mortise structure drone frame and a six-rotor drone. Background Technology

[0002] In recent years, drone technology has developed rapidly worldwide and has been widely used in many fields such as aerial surveying and mapping, agricultural plant protection, logistics and distribution, security inspection, emergency rescue, and infrastructure construction. As application scenarios continue to expand and deepen, the market has placed more stringent demands on drone performance, prompting drones to continue evolving towards greater efficiency, intelligence, and reliability.

[0003] As industry demands continue to upgrade, heavy-duty drones, with their ability to carry large equipment and transport heavy materials, are playing an increasingly important role in industrial applications.

[0004] In the construction sector, the planning and construction of large-scale infrastructure projects such as bridges, railways, tunnels, buildings, and facilities require drones equipped with heavy equipment such as lidar and high-precision mapping cameras for terrain modeling, construction progress monitoring, and structural inspection. In construction sites with rugged terrain and inconvenient transportation, drones can be used for transportation and inspection, and can also carry building materials. The application of drones can solve the problems of low efficiency and specific requirements of traditional transportation methods in terms of construction environment and transportation. They can also replace helicopters in addressing the high costs and landing space requirements of these tasks. For example, in the construction of cross-sea bridges, high-payload drones can carry inspection equipment weighing several kilograms to conduct close-range inspections of key structural parts of the bridge, promptly identifying potential hazards. In the field of emergency rescue, when natural disasters occur, such drones can deliver emergency supplies such as food, medicine, and life jackets to remote disaster areas or inaccessible regions, with a single payload reaching several kilograms or even higher, providing strong support for rescue efforts. In the logistics and transportation sector, some companies are exploring the use of high-payload drones to achieve cross-regional, long-distance cargo transportation to solve the delivery problems of traditional logistics in remote or inaccessible areas.

[0005] To meet heavy payload requirements, drone fuselages are often made of high-strength aluminum alloys, titanium alloys, and other metal materials. These aluminum or titanium alloys are assembled and reinforced with metal connectors, ensuring a certain load-bearing capacity. However, the numerous additional support structures and reinforcement components not only increase the weight of the fuselage but also increase structural complexity, reducing assembly efficiency and maintenance convenience, and raising overall costs. Furthermore, the complex structure leads to an unbalanced center of gravity distribution, making the drone prone to swaying and vibration during flight, affecting flight stability and controllability. For example, some heavy-duty drones used for logistics transportation have excessively reinforced fuselage frames to carry heavier loads, resulting in an unexpectedly high weight. This requires more power to maintain balance during flight and frequently leads to malfunctions such as loose parts and wear.

[0006] To further expand the application boundaries of heavy-payload UAVs and improve their operational efficiency in construction, rescue, logistics, and other fields, it is urgent to overcome existing technological bottlenecks. Solving problems such as high airframe costs, low assembly efficiency, and poor flight stability can significantly improve the assembly efficiency and reliability of heavy-payload UAVs, reduce production costs, and enable them to better adapt to complex environments and diverse mission requirements. Utility Model Content

[0007] The purpose of this utility model is to provide a mortise and tenon structure drone frame and a drone using the mortise and tenon structure drone frame, so as to solve at least one of the above-mentioned technical problems.

[0008] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a mortise and tenon structure drone frame, including a fuselage, arms, and landing gear. The fuselage is hexagonal, and the arms are correspondingly arranged at the corners of the fuselage. The landing gear is connected to the lower part of the fuselage. The fuselage includes a first triangular frame and a second triangular frame whose corners are staggered and connected. The first triangular frame includes multiple first connecting rods connected in sequence, and the second triangular frame includes multiple second connecting rods connected in sequence. The first and second connecting rods are provided with mutually cooperating tenons and mortises, and are mortised and tenoned by the tenon of one connecting rod being embedded in the mortis of the other connecting rod.

[0009] In one embodiment, both the first connecting rod and the second connecting rod include a rod body, wherein a tenon groove is cut from one side to the other side along the vertical direction, and the portion from the bottom of the tenon groove to the other end face of the rod body forms a tenon.

[0010] In one embodiment, after the first connecting rod and the second connecting rod are assembled, the two sides of the first connecting rod in the vertical direction of the machine body are flush with the corresponding sides of the second connecting rod.

[0011] In one embodiment, the first connecting rod and the second connecting rod are welded together at the tenon joint.

[0012] In one embodiment, the ends of every two first connecting rods that are close to each other and the ends of every two second connecting rods that are close to each other are connected by a mounting block. The mounting block is provided with a boom mounting sleeve. The center line of the boom mounting sleeve coincides with the angle bisector of the angle defined by the corresponding two connecting rods. The boom is inserted into the boom mounting sleeve.

[0013] In one embodiment, the ends of the first connecting rod and the second connecting rod are each cut to form a first connecting bevel, which abuts against and is welded to the end face of the mounting block.

[0014] In one embodiment, both the first connecting rod and the second connecting rod have support holes through which the arm mounting sleeve at the corner of another triangular frame passes.

[0015] In one embodiment, the fuselage further includes a flight control mounting bracket, which is located at the center of the fuselage and welded to a first triangular frame and a second triangular frame.

[0016] In one embodiment, the flight control mounting frame includes a pair of parallel support rods and a reinforcing rod spanning between the two support rods. The two ends of the support rods are connected to two sides of a triangular frame. A cable protection tube is also connected between the support rods and the first connecting rod or the second connecting rod. The centerline of the cable protection tube is collinear with the centerline of the corresponding arm.

[0017] As a second aspect, this utility model provides a six-rotor drone, which includes the above-mentioned tenon-and-mortise structure drone frame and six rotors, the six rotors being installed one-to-one on each of the arms.

[0018] The beneficial effects of the technical solution provided by this utility model are: The mortise and tenon structure drone frame of this utility model is assembled by using a mortise and tenon connection between two triangular frames. At least the assembly of the fuselage does not require connecting parts, which avoids connecting parts occupying space and increasing the weight of the fuselage, improves the assembly efficiency of the frame and reduces production costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below.

[0020] Figure 1 This is a structural schematic diagram of a tenon-and-mortise structure drone frame provided in one embodiment of the present invention; Figure 2 This is a schematic diagram of the fuselage structure provided in one embodiment of the present invention; Figure 3 for Figure 2 The diagram shows the fuselage without the second connecting rod. Figure 4 This is a schematic diagram of the structure of the first connecting rod provided in one embodiment of the present utility model; Figure 5 This is a schematic diagram of the structure of the second connecting rod provided in one embodiment of the present invention; Figure 6 This is a schematic diagram of the support rod provided in one embodiment of the present invention. Detailed Implementation

[0021] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0022] It should be understood that the steps described in the method embodiments of this utility model may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this utility model is not limited in this respect.

[0023] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "connection" can refer to a direct connection or an indirect connection via intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.

[0024] It should be noted that the concepts of "first" and "second" mentioned in this utility model are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to necessarily be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0025] See Figures 1 to 6This utility model provides a tenon-and-mortise structure drone frame (hereinafter referred to as "frame"), which is formed by processing high-strength aluminum alloy (such as aviation aluminum profile) or titanium alloy, and has great mechanical strength, thus having a strong load-bearing capacity. In addition, a hexacopter drone using this frame is also provided.

[0026] The frame includes a fuselage 100, arms and landing gear 200. The fuselage 100 is hexagonal, and the six arms are arranged radially around the outer periphery of the fuselage, specifically at the corners of the fuselage 100. The landing gear 200 is connected to the lower part of the fuselage 100.

[0027] The fuselage 100 is generally hexagonal, consisting of a first triangular frame 110 and a second triangular frame 120. The first triangular frame 110 and the second triangular frame 120 are connected by mortise and tenon joints with staggered corners, and the centerlines of each arm are coplanar. Six rotors are mounted at the six corners of the hexagonal fuselage via corresponding arms. Preferably, both triangular frames are equilateral triangles, and the two triangular frames are riveted together along the vertical direction. It should be understood that the equilateral triangles are generally equilateral triangles and are centrally symmetrical.

[0028] In one embodiment, the first triangular frame 110 includes three first connecting rods 10 connected in sequence, and the second triangular frame 120 includes three second connecting rods 20 connected in sequence. The first and second connecting rods are provided with mortise and tenon joints that fit together.

[0029] The tenon and mortise mentioned above are opposite assembly surfaces. The first connecting rod 10 and the second connecting rod 20 are connected by mortise and tenon joints in which the tenon of one connecting rod is embedded in the mortise of the other connecting rod.

[0030] Understandably, the first connecting rod 10 is provided with a mortise 11, and the second connecting rod 20 is provided with a tenon 22 corresponding to the mortise 11; conversely, the first connecting rod 10 is provided with a tenon 12, and the second connecting rod 20 is provided with a mortise 21; or both the first connecting rod 10 and the second connecting rod 20 are provided with tenons and mortises, all of which can achieve the mortise and tenon connection between the first connecting rod 10 and the second connecting rod 20. Therefore, by providing at least one of the first connecting rod 10 and the second connecting rod 20 with a mortise and tenon, and the other providing a tenon at a position corresponding to the mortise and tenon, and a mortise at a position corresponding to the tenon, the first connecting rod and the second connecting rod are mortised and tenoned together, facilitating the assembly of the two connecting rods.

[0031] In one embodiment, both the first connecting rod 10 and the second connecting rod 20 include a rod body. The rod body is cut with the tenon groove from one side to the other in the vertical direction. The remaining part of the rod body after cutting the tenon groove in the vertical direction of the body 100, that is, the part of the rod body from the bottom of the tenon groove to the other end face of the rod body, forms a tenon. In this embodiment, the sum of the depth of the tenon groove and the height of the tenon is equal to the height of the rod body in the vertical direction of the body 100.

[0032] In one embodiment, after the first connecting rod 10 and the second connecting rod 20 are assembled, the two sides of the first connecting rod 10 in the vertical direction of the body 100 are flush with the corresponding sides of the second connecting rod 20.

[0033] Optionally, the first connecting rod 10 and the second connecting rod 20 have the same rod structure, both of which are formed by processing square rods or square tubes. The dimensions of the square rods (or square tubes) along the vertical direction of the machine body 100 are the same, so that the outer surface of the tenon and mortise of the two connecting rods after they are engaged and assembled is a continuous surface, ensuring the flatness of the connecting rod surface.

[0034] In one embodiment, the first connecting rod 10 and the second connecting rod 20 are welded together at a mortise and tenon joint. Thus, through the mortise and tenon connection between the connecting rods, combined with welding, the frame has sufficient structural strength, eliminating the need for connecting accessories and reducing the weight of the frame.

[0035] In one embodiment, the adjacent ends of every two first connecting rods 10 and the adjacent ends of every two second connecting rods 20 are connected by mounting blocks 30. The mounting blocks 30 have mounting holes into which arm mounting sleeves 40 are inserted. The centerline of the arm mounting sleeve 40 coincides with the angle bisector of the angle defined by the corresponding two connecting rods. The arm is inserted into the arm mounting sleeve 40. By using mounting blocks 30 at the corners of the fuselage 100 to connect the adjacent ends of two connecting rods and mounting the arm onto the mounting blocks 30, the structural stability of the UAV is improved.

[0036] In one embodiment, the ends of the first connecting rod 10 and the second connecting rod 20 are each cut to form a first connecting bevel, which abuts against and is welded to the end face of the mounting block 30.

[0037] In one embodiment, the first connecting rod 10 has a support hole 13 for placing the end of the arm mounting sleeve 40 on the second triangular frame, and the second connecting rod 20 has a support hole 23 for the arm mounting sleeve 40 at the corner of the first triangular frame to pass through. The arm mounting sleeve 40 passes through the mounting hole of the mounting block 30 and is inserted into the corresponding support hole. The arm mounting sleeve 40 can be fastened to each hole by a tight fit, or by a clearance fit and welding.

[0038] In one embodiment, the fuselage 100 further includes a flight control mounting bracket, which is located at the center of the fuselage 100 and welded to the first triangular frame 110 and the second triangular frame 120.

[0039] In one embodiment, the flight control mounting bracket includes a pair of parallel support rods 50 and a reinforcing rod 60 spanning between the two support rods 50. The two ends of the support rods 50 are connected to two sides of a triangular frame. A cable protection tube 41 is also connected between the support rods 50 and the first connecting rod 10 or the second connecting rod 20. The center line of the cable protection tube 41 is collinear with the center line of the corresponding arm. The cable protection tube 41 can both store the cables and reduce the resonance generated by the rotor to a certain extent.

[0040] The support rod 50 is connected to the intersection of the first triangular frame 110 and the second triangular frame 120. Its end is provided with an end face and a second connecting slope 52 that is inclined to the end face. The end face is connected to one of the triangular frames, and the second connecting slope 52 is connected to the other triangular frame.

[0041] Optionally, the arm mounting sleeve 40, the cable protection tube 41, and the arm are all formed by processing round tubes, preferably made of carbon fiber tubes. While meeting the strength requirements, this further reduces the weight of the frame, thereby improving the drone's endurance.

[0042] The frame of this utility model has a body 100 part with a square cross-section straight rod tenon and tenon joint and a round tube and hole insertion tenon and tenon joint. The entire frame is tenon and tenon jointed and fixed by welding, without the need for connecting accessories, thereby reducing the weight of the frame itself and improving the endurance of the drone.

[0043] The landing gear 200 adopts a frame structure, primarily made of lightweight alloy, to ensure sufficient strength to support the weight of the UAV while reducing its own weight. The landing gear 200 plays a crucial role in the UAV's takeoff and landing. First, it maintains a safe distance between the fuselage and the ground, preventing the aircraft from tilting due to instability when taking off or landing close to the ground, thus avoiding rotor collisions and protecting the rotor and fuselage. Second, the landing gear creates sufficient space between the rotor and the ground, effectively reducing airflow interference between the aircraft and the ground during takeoff and landing, improving stability and safety during the process. The landing gear 200 is installed at the bottom of the frame, typically symmetrically mounted at the four corners of the fuselage 100, ensuring stable support and maintaining the aircraft's balance during takeoff and landing. In this invention, the landing gear 200 is welded to the fuselage.

[0044] As a second aspect, this utility model also discloses a drone, which includes the above-mentioned mortise and tenon structure drone frame, battery, flight control module and six rotors, the six rotors being installed one-to-one at the end of the arm away from the fuselage 100 and electrically connected to the battery and flight control module.

[0045] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features of the utility model in this utility model that have similar functions.

[0046] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A tenon-and-mortise structure unmanned aerial vehicle (UAV) frame, comprising a fuselage, arms, and landing gear, wherein the fuselage is hexagonal, the arms are correspondingly disposed at the corners of the fuselage, and the landing gear is connected to the lower part of the fuselage, characterized in that, The fuselage includes a first triangular frame and a second triangular frame connected at staggered corners. The first triangular frame includes multiple first connecting rods connected in sequence, and the second triangular frame includes multiple second connecting rods connected in sequence. The first and second connecting rods are provided with tenons and mortises that cooperate with each other and are connected by mortise and tenon joints in such a way that the tenon of one connecting rod is embedded in the mortise of the other connecting rod.

2. The mortise and tenon structure UAV frame according to claim 1, characterized in that, Both the first connecting rod and the second connecting rod include a rod body, and the rod body is cut with a tenon groove from one side to the other side in the vertical direction, and the part from the bottom of the tenon groove to the other end face of the rod body forms a tenon.

3. The mortise and tenon structure UAV frame according to claim 1, characterized in that, After the first connecting rod and the second connecting rod are assembled, the two sides of the first connecting rod in the vertical direction of the machine body are flush with the corresponding sides of the second connecting rod.

4. The mortise and tenon structure UAV frame according to claim 1, characterized in that, The first connecting rod and the second connecting rod are welded together at the tenon and mortise joint.

5. The mortise and tenon structure UAV frame according to claim 1, characterized in that, The ends of every two first connecting rods that are close to each other and the ends of every two second connecting rods that are close to each other are connected by a mounting block. The mounting block is provided with a boom mounting sleeve. The center line of the boom mounting sleeve coincides with the angle bisector of the angle defined by the corresponding two connecting rods. The boom is inserted into the boom mounting sleeve.

6. The mortise and tenon structure UAV frame according to claim 5, characterized in that, The ends of the first connecting rod and the second connecting rod are each cut to form a first connecting bevel, which abuts against and is welded to the end face of the mounting block.

7. The mortise and tenon structure UAV frame according to claim 5, characterized in that, Both the first and second connecting rods have support holes for the arm mounting sleeve at the corner of another triangular frame to pass through.

8. The tenon-and-mortise structure UAV frame according to claim 1, characterized in that, The fuselage also includes a flight control mounting bracket, which is located at the center of the fuselage and welded to the first triangular frame and the second triangular frame.

9. The mortise and tenon structure UAV frame according to claim 8, characterized in that, The flight control mounting frame includes a pair of parallel support rods and a reinforcing rod spanning between the two support rods. The two ends of the support rods are connected to two sides of a triangular frame. A cable protection tube is also connected between the support rod and the first connecting rod or the second connecting rod. The center line of the cable protection tube is collinear with the center line of the corresponding arm.

10. A hexacopter unmanned aerial vehicle, characterized in that, The unmanned aerial vehicle (UAV) includes a mortise and tenon structure frame as described in any one of claims 1 to 9 and six rotors, wherein the six rotors are mounted one-to-one on each of the arms.

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