Multi-rotor unmanned aerial vehicle undercarriage

Abstract

The multi-rotor unmanned aerial vehicle undercarriage comprises a fuselage fixing assembly and a connecting assembly arranged at the bottom of the fuselage fixing assembly, inclined strut assemblies are arranged on the front side and the rear side of the connecting assembly respectively, and bottom prying assemblies are arranged on the left sides and the right sides of the two inclined strut assemblies; the machine body fixing assembly comprises a polygonal pipe body frame, and the two ends of symmetrical pipe bodies on the two sides of the polygonal pipe body frame extend outwards respectively. The connecting assembly comprises two straight pipe bodies corresponding to the lower portions of the extending pipe bodies. The inclined strut assembly comprises trapezoidal pipe bodies fixed to the ends of the same sides of the two straight pipe bodies. The bottom prying assembly comprises W-shaped pipe bodies fixed to the ends of the same sides of the two trapezoidal pipe bodies. According to the landing gear, the overall strength and stability of the landing gear are enhanced through the structures such as the trapezoidal pipe body and the W-shaped pipe body, so that the large multi-rotor unmanned aerial vehicle can take off and land safely in more diversified environments, and the landing gear adapts to uneven ground conditions by optimizing the structural design of the landing gear, especially the W-shaped pipe body design in the bottom prying assembly.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, specifically to a landing gear for a multi-rotor UAV. Background Technology

[0002] A multi-rotor drone is an aircraft that uses multiple rotors to provide lift and thrust. Unlike fixed-wing aircraft, it relies on the coordinated action of multiple rotors to achieve stable flight. Landing gear is an indispensable part of a multi-rotor drone; it is an accessory device located at the bottom of the drone used for takeoff and landing support. The landing gear is the only component that supports the entire drone, making it an integral part; without it, the drone cannot take off and land stably.

[0003] Existing multi-rotor drone landing gear typically consists of components such as triangular mounting plates, mounting holes, support frames, and support rods. Traditional multi-rotor drone landing gear usually supports the drone during takeoff and landing through support frames and support rods. This method is not strong enough for large multi-rotor drones. Most drone landing gears have many restrictions on takeoff and landing, and generally require relatively flat ground for takeoff and landing. Utility Model Content

[0004] This invention proposes a landing gear for multi-rotor unmanned aerial vehicles (UAVs), which solves the limitation of traditional landing gears in the prior art that require high flatness of the take-off and landing ground.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A multi-rotor unmanned aerial vehicle (UAV) landing gear includes a fuselage fixing assembly and a connecting assembly located at its bottom. The connecting assembly has diagonal bracing assemblies on its front and rear sides, and bottom skid assemblies on its left and right sides. The fuselage fixing assembly includes a polygonal tube frame, with two symmetrical tubes extending outwards from their ends. The connecting assembly includes two straight tubes below the corresponding extended tubes. The diagonal bracing assemblies include trapezoidal tubes fixed to the same side ends of the two straight tubes. The bottom skid assemblies include W-shaped tubes fixed to the same side ends of the two trapezoidal tubes.

[0007] Furthermore, the polygonal tube frame is a hexagonal tube frame, and each tube is provided with a connector A that is fixed to the fuselage of the UAV by bolts.

[0008] Furthermore, connectors B, which are sleeved and fixed to the wall of the straight pipe, are respectively installed at both ends of the symmetrically arranged extension tubes.

[0009] Furthermore, each end of the straight pipe body is provided with a connector C that is sleeved and fixed to the wall of the trapezoidal pipe body.

[0010] Furthermore, each end of the trapezoidal tube is provided with a connector D that is sleeved and fixed to the wall of the W-shaped tube.

[0011] Furthermore, grounding sleeves are provided on both sides of the W-shaped tube.

[0012] Furthermore, it also includes a cross bracing assembly, which includes cross bracing tubes respectively located below the two trapezoidal tubes. The two ends of the cross bracing tubes are respectively fixed to the two inclined sides of the trapezoidal tubes by connecting pieces E.

[0013] Furthermore, it also includes a longitudinal bracing assembly, which includes two longitudinal bracing tubes connected to the adjacent inclined sides of the two trapezoidal tubes. The two ends of the longitudinal bracing tubes are respectively fixed to the inclined side wall of the two trapezoidal tubes on the same side by means of connecting pieces F.

[0014] The beneficial effects of the technical solution provided in this application are as follows:

[0015] This multi-rotor UAV landing gear solution enhances the overall strength and stability of the landing gear by introducing structures such as polygonal tube frames, straight tube frames, trapezoidal tube frames, and W-shaped tube frames. This enables large multi-rotor UAVs to take off and land safely in more diverse environments. By optimizing the structural design of the landing gear, especially the W-shaped tube design in the skid assembly, this solution can better adapt to uneven ground conditions and reduce dependence on take-off and landing sites. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the landing gear of the multi-rotor UAV of this utility model;

[0018] Figure 2 This is a schematic diagram of the polygonal tube frame and connector A of this utility model;

[0019] Figure 3 This is a schematic diagram of the polygonal tube frame, straight tube body, and connector B of this utility model;

[0020] Figure 4 This is a schematic diagram of the polygonal tube frame, trapezoidal tube, and connector C of this utility model;

[0021] Figure 5 This is a schematic diagram of the W-shaped tube body, grounding sleeve, trapezoidal tube body, and connector D of this utility model;

[0022] Figure 6 This is a schematic diagram of the horizontal and vertical bracing components of this utility model.

[0023] In the diagram: 10 Fuselage fixing assembly, 11 Polygonal tube frame, 12 Connector A, 13 Connector B; 20 Connecting assembly, 21 Straight tube body, 22 Connector C; 30 Diagonal brace assembly, 31 Trapezoidal tube body, 32 Connector D; 40 Horizontal brace assembly, 41 Horizontal brace tube body, 42 Connector E; 50 Longitudinal brace assembly, 51 Longitudinal brace tube body, 52 Connector F; 60 Bottom skid assembly, 61 W-shaped tube body, 62 Grounding sleeve. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and 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.

[0025] Reference Figure 1-6 A multi-rotor unmanned aerial vehicle (UAV) landing gear includes a fuselage fixing assembly 10 and a connecting assembly 20 located at its bottom. The connecting assembly 20 has diagonal bracing assemblies 30 on its front and rear sides, and bottom skid assemblies 60 on its left and right sides. The fuselage fixing assembly 10 includes a polygonal tube frame 11, with two symmetrical tubes extending outwards from their ends. The connecting assembly 20 includes two straight tubes 21 below the corresponding extending tubes. The diagonal bracing assemblies 30 include trapezoidal tubes 31 fixed to the same side of the two straight tubes 21. The bottom skid assemblies 60 include W-shaped tubes 61 fixed to the same side of the two trapezoidal tubes 31.

[0026] The stability and adaptability of the multi-rotor UAV landing gear are enhanced by forming a robust frame structure. The two trapezoidal tubes 31 of the bracing assembly 30 are arranged longitudinally, while the W-shaped tube 61 of the bottom skid assembly 60 and the straight tube 21 of the connecting assembly 20 are respectively fixed between the two trapezoidal tubes 31. This design allows the landing gear to distribute the load when bearing the weight of the UAV, reducing stress on any single component and thus improving the durability of the landing gear. Furthermore, this frame structure contributes to stable takeoff and landing of the UAV on uneven ground because it better absorbs and disperses forces generated by ground irregularities.

[0027] When the drone is preparing to take off or land, the fuselage fixing assembly 10 first connects to the drone fuselage to ensure the overall stability of the landing gear. The connecting assembly 20 connects to the polygonal tube frame 11 via a straight tube body 21, providing basic support for the landing gear. The diagonal brace assembly 30 and the bottom skid assembly 60 connect to the straight tube body 21 via trapezoidal tube bodies 31 and W-shaped tube bodies 61, respectively, forming a stable frame structure. This frame structure not only enhances the strength of the landing gear but also improves its adaptability to different ground conditions, enabling the drone to operate safely on a wider variety of terrains.

[0028] Furthermore, the polygonal tube frame 11 is a hexagonal tube frame, with each tube having a connector A12 that is bolted to the UAV fuselage. As the main support structure for the landing gear, the polygonal tube frame 11's hexagonal design provides uniform force distribution and high structural strength. Connector A12 includes an arc-shaped cover and two arc-shaped blocks (not marked in the figure). The arc-shaped cover is located below the tube, while the two arc-shaped blocks are located above the tubes of the tube frame, corresponding to the two ends of the arc-shaped cover below the tube. Bolts extend upwards through the arc-shaped cover and are threaded to the bottom of the fuselage. The arc-shaped cover and arc-shaped blocks cooperate to clamp the tube, forming a stable connection. This connection method not only ensures a secure connection between the landing gear and the UAV fuselage but also allows for quick installation and disassembly, facilitating UAV maintenance and transportation.

[0029] Furthermore, connectors B13 are fitted onto the ends of the two symmetrically arranged extension tubes, respectively, and fixed to the wall of the straight tube 21. Connector B13 consists of two arc-shaped blocks and one H-shaped block (not marked in the figure). The two arc-shaped blocks clamp the upper part of the extension tube and the lower part of the straight tube 21, respectively, while the H-shaped block, with its upper and lower arc shapes, clamps the lower part of the extension tube and the upper part of the straight tube 21, corresponding to the upper and lower arc-shaped blocks. The sides of all three are fixed with bolts, forming a stable connection. This connection method not only ensures a firm connection between the extension tube and the straight tube but also allows for quick disassembly when needed, facilitating the maintenance and transportation of the UAV.

[0030] Furthermore, each end of the straight pipe body 21 is provided with a connector C22 that is sleeved and fixed to the wall of the trapezoidal pipe body 31. The connector C22 consists of two symmetrically arranged T-shaped caps (not marked in the figure), with a T-shaped groove with an arc between them. During installation, the two T-shaped caps are symmetrically spliced ​​together, and the T-shaped groove surrounds both the straight pipe body 21 and the trapezoidal pipe body 31. This design allows the T-shaped caps to fit tightly against the surfaces of the straight and trapezoidal pipe bodies, thus forming a stable connection. The two T-shaped caps are fixed with bolts, further enhancing the strength of the connection.

[0031] Furthermore, each end of the trapezoidal tube 31 is provided with a connector D32 that is sleeved and fixed to the wall of the W-shaped tube 61. The connector D32 consists of two symmetrically arranged arc-shaped caps (not marked in the figure), which are respectively clamped above and below the W-shaped tube 61. The upper arc-shaped cap has an integrally formed sleeve that surrounds the exterior of the trapezoidal tube 31. During installation, the two arc-shaped caps are fixed with bolts, thereby achieving a stable connection between the trapezoidal tube and the W-shaped tube. This connection method not only ensures a firm connection between the trapezoidal tube and the W-shaped tube but also allows for quick disassembly when needed.

[0032] Furthermore, grounding sleeves 62 are provided on both sides of the W-shaped tube 61. The grounding sleeves 62 are directly installed at both ends of the W-shaped tube 61. When the UAV lands, the grounding sleeves are the first to contact the ground, acting as a buffer and reducing direct impact on the W-shaped tube. During takeoff, the grounding sleeves also provide support, ensuring the stability of the UAV at the moment of takeoff. This design makes the landing gear more stable when bearing the weight of the UAV and external impacts, improving the operational safety of the UAV in complex environments.

[0033] Furthermore, the system also includes a cross brace assembly 40, which comprises cross brace tubes 41 respectively located below the two trapezoidal tubes 31. The two ends of each cross brace tube 41 are respectively fixed to the two inclined sides of the trapezoidal tube 31 via connectors E42. The cross brace assembly 40 connects the two trapezoidal tubes 31 via the cross brace tubes 41, and the two ends of the cross brace tubes are fixed via connectors E42. Connector E42 includes two arc-shaped caps and a U-shaped seat (not marked in the figure). The arc-shaped caps are clamped around the inclined sides of the trapezoidal tube, while the U-shaped seat is fixed to the end of the cross brace tube 41. A protrusion is rotatably mounted inside the U-shaped seat via a pivot. The protrusion is integrally formed with the arc-shaped cap located inside the trapezoidal tube, and the two arc-shaped caps are fixed with bolts. This design allows the protrusion to rotate within the U-shaped seat to adapt to different installation angles and force directions, thus providing a more flexible and stable connection. When a drone is subjected to takeoff and landing impacts or moves on uneven ground, the cross brace assembly can provide additional support, reduce stress on the main support structure, and improve the overall durability of the landing gear.

[0034] Furthermore, the system also includes a longitudinal support assembly 50. The longitudinal support assembly 40 comprises two longitudinal support tubes 51 connected to the adjacent inclined sides of two trapezoidal tubes 31. The two ends of each longitudinal support tube 51 are respectively fixed to the inclined wall of the two trapezoidal tubes 31 on the same side by connecting pieces F52. The longitudinal support assembly 50 connects the adjacent inclined sides of the two trapezoidal tubes 31 through the longitudinal support tubes 51, and the two ends of the longitudinal support tubes are fixed by the connecting pieces F52. The connecting piece F52 includes two arc-shaped blocks and a U-shaped seat (not marked in the figure). The arc-shaped blocks symmetrically clamp the two sides of the inclined wall of the trapezoidal tube, while the U-shaped seat is fixed to the end of the longitudinal support tube 51. The U-shaped seat is rotatably connected to one side of the two arc-shaped blocks via a pivot, and the other side of the two arc-shaped blocks is fixed by bolts. This design allows the arc-shaped blocks to rotate within the U-shaped seat to adapt to different installation angles and force directions, thus providing a more flexible and stable connection. When the drone is taking off, landing, or moving on uneven ground, the longitudinal bracing assembly can provide additional longitudinal support, reducing stress on the main support structure and improving the overall durability and reliability of the landing gear.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A landing gear for a multi-rotor unmanned aerial vehicle (UAV), comprising a fuselage fixing assembly (10) and a connecting assembly (20) disposed at its bottom, wherein each of the front and rear sides of the connecting assembly (20) is provided with a diagonal brace assembly (30), and the left and right sides of the two diagonal brace assemblies (30) are provided with a bottom skid assembly (60); characterized in that, The fuselage fixing assembly (10) includes a polygonal tube frame (11), in which two symmetrical tubes extend outward from their ends; the connecting assembly (20) includes two straight tubes (21) below the corresponding extended tubes; the diagonal bracing assembly (30) includes a trapezoidal tube (31) fixed to the same side end of the two straight tubes (21); the bottom skid assembly (60) includes a W-shaped tube (61) fixed to the same side end of the two trapezoidal tubes (31).

2. The landing gear for a multi-rotor unmanned aerial vehicle as described in claim 1, characterized in that, The polygonal tube frame (11) is a hexagonal tube frame, and each tube is provided with a connector A (12) that is fixed to the fuselage of the UAV by bolts.

3. The landing gear for a multi-rotor unmanned aerial vehicle as described in claim 2, characterized in that, The two ends of the symmetrically arranged extension tubes are respectively fitted with connectors B (13) that are sleeved and fixed to the wall of the straight tube (21).

4. The landing gear for a multi-rotor unmanned aerial vehicle as described in claim 1, characterized in that, The straight pipe body (21) is provided with connectors C (22) at both ends, which are sleeved and fixed to the wall of the trapezoidal pipe body (31).

5. The landing gear for a multi-rotor unmanned aerial vehicle as described in claim 1, characterized in that, The trapezoidal tube (31) is provided with connectors D (32) at both ends, which are sleeved and fixed to the wall of the W-shaped tube (61).

6. The landing gear for a multi-rotor unmanned aerial vehicle as described in claim 1, characterized in that, The W-shaped tube (61) is provided with grounding sleeves (62) on both sides.

7. The landing gear for a multi-rotor unmanned aerial vehicle as described in claim 1, characterized in that, It also includes a cross bracing assembly (40), which includes a cross bracing tube (41) respectively located below two trapezoidal tubes (31). The two ends of the cross bracing tube (41) are respectively fixed to the two inclined tube walls of the trapezoidal tube (31) by means of a connecting piece E (42).

8. The landing gear for a multi-rotor unmanned aerial vehicle as described in claim 1, characterized in that, It also includes a longitudinal bracing assembly (50), which includes two longitudinal bracing tubes (51) connected to the adjacent inclined sides of the two trapezoidal tubes (31). The two ends of the longitudinal bracing tubes (51) are respectively fixed to the inclined side wall of the two trapezoidal tubes (31) on the same side by means of connecting pieces F (52).

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