A vertical take-off and landing drone landing gear

Abstract

The utility model discloses a kind of vertical take-off and landing unmanned aerial vehicle landing gear, it is related to unmanned aerial vehicle landing gear field, including unmanned aerial vehicle and landing gear, the bottom of the unmanned aerial vehicle is provided with two groups of landing gear in both sides, the bottom of the landing gear is provided with guard frame, the top of the guard frame is fixed with two groups of fixed plate by welding, the top of the guard frame one side is fixed with stress plate, and stress plate and fixed plate are welded together, the stress plate top one side is connected with connecting plate. The guard frame of the utility model landing gear bottom sleeve installation can pass through the connecting plate of its one side bolt connection connecting plate and transmit the bending moment of unmanned aerial vehicle single side landing gear to opposite side, so that the landing gear of the bottom of unmanned aerial vehicle both sides jointly bears load, to reduce the degree of landing gear stress bending, and unmanned aerial vehicle in landing process, landing gear is contacted and rubbed with ground through the guard frame of its bottom setting, to avoid abrasion of landing gear of carbon fiber material and ground contact.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) landing gear, specifically a vertical take-off and landing (VTOL) UAV landing gear. Background Technology

[0002] Vertical takeoff and landing (VTOL) drones are a type of unmanned aerial vehicle that can take off, hover, and land vertically without relying on long runways, using their own power systems. Their core advantage lies in their strong adaptability to the takeoff and landing environment. They can be flexibly deployed in narrow urban airspace, unpaved fields, or complex terrain in emergency rescue. These drones combine the vertical takeoff and landing capabilities of multi-rotor drones with the long endurance of fixed-wing drones and are widely used in power line inspection, geological exploration, and emergency communication.

[0003] To balance support stability and takeoff and landing flexibility, the landing gear of existing vertical takeoff and landing drones usually adopts a support leg structure that is tilted and bent towards both sides of the fuselage. The core logic of this design is to expand the lateral support span of the fuselage through outward expansion support, reduce the risk of tipping over during hovering and takeoff and landing, and at the same time, the bent support leg shape can initially buffer the impact load through its own deformation at the moment of ground contact, reducing the vibration impact on the internal equipment of the fuselage.

[0004] The fuselage and landing gear components of existing vertical takeoff and landing (VTOL) drones are generally made of carbon fiber composite materials. However, when a drone makes a rapid descent due to operational errors or sudden airflow, the landing gear at the bottom of the drone is very likely to make contact with the ground on one side first. The instantaneous impact load applied by the ground can easily exceed the bending limit of the carbon fiber landing gear, causing irreversible bending deformation. At the same time, during vertical takeoff and landing, the bottom of the landing gear needs to continuously contact and rub against the ground, and the surface of the carbon fiber material is prone to wear and fuzzing. If the wear depth reaches the internal fiber layer, it will directly affect the structural strength of the landing gear, requiring frequent replacement of the entire landing gear assembly, which greatly increases the maintenance cost of the drone. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a landing gear for a vertical take-off and landing unmanned aerial vehicle (UAV) to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vertical take-off and landing (VTOL) unmanned aerial vehicle (UAV) landing gear, comprising a UAV and landing gear, wherein two sets of landing gear are provided on both sides of the bottom of the UAV, a mounting plate is fixed to the top of the landing gear, a protective frame is provided at the bottom of the landing gear, two sets of fixing plates are welded and fixed to the top of the protective frame, a stress plate is fixed to one side of the top of the protective frame, and the stress plate is welded together with the fixing plate, and a connecting plate is connected to one side of the top of the stress plate.

[0007] By adopting the above technical solution, the problem of frequent replacement of UAV landing gear due to impact and friction damage caused by rapid descent is solved. When the UAV lands rapidly on the ground, the ground impact load acts on the landing gear. The protective frame installed at the bottom of the landing gear can transfer the bending moment of the UAV landing gear on one side to the other side through the connecting plate bolted on one side. This allows the landing gear on both sides of the UAV bottom to share the load, thereby reducing the degree of bending of the landing gear under stress. Furthermore, during the landing process, the landing gear contacts and rubs against the ground through the protective frame at its bottom, thus preventing the carbon fiber landing gear from wearing out due to contact with the ground.

[0008] The present invention is further configured such that the fixing plate is L-shaped and the fixing plate is fixed to the bottom of the landing gear by bolts.

[0009] Preferably, when the landing gear is inserted into the interior of the fixed plate, the bottom of the landing gear can be fixed inside the fixed plate by bolts.

[0010] The present invention is further configured such that the shape of one side wall of the force-bearing plate matches the shape of one side wall of the landing gear.

[0011] Preferably, when the ground impacts the protective frame, the protective frame will distribute and transmit the impact force to the landing gear through its top wall and stress plate, thereby reducing the stress generated by the ground impacting the landing gear.

[0012] The present invention is further configured such that the length of the load-bearing plate is equal to one-third of the total length of the landing gear and the mounting plate.

[0013] Preferably, the area at the bottom, which is one-third the length of the landing gear, is the area where the maximum bending moment is generated when the UAV lands rapidly. The connecting plate can connect the two landing gears into a whole to form a frame structure, and transfer the bending moment originally borne by one side to the other side through the connecting plate, so that the landing gears on both sides of the bottom of the UAV share the load, thereby reducing the maximum bending moment of a single landing gear.

[0014] The present invention is further configured such that arc-shaped plates are fixed at both ends of the protective frame, and the arc-shaped plates are curved upward.

[0015] Preferably, the upward-curved arc plate allows the drone to glide smoothly over the unadjusted ground during takeoff and landing, thereby enhancing the drone's flexibility in taking off and landing in complex terrain.

[0016] The present invention is further configured such that side skirts are fixed on both sides of the protective frame, and the corners of the side skirts are rounded.

[0017] Preferably, the side skirts increase the contact area between the protective frame and the ground, thereby dispersing the impact load from the ground on the protective frame.

[0018] The present invention is further configured such that both ends of the connecting plate are arc-shaped, and the arc-shaped wall surface at the end of the connecting plate is in contact with the wall surface of the load-bearing plate.

[0019] Preferably, the connecting plate is arc-shaped at both ends, which increases the contact area between the ends of the connecting plate and the load-bearing plate, thereby reducing the stress generated by the contact between the connecting plate and the load-bearing plate.

[0020] The present invention is further configured such that the length of the protective frame is greater than the distance between the two sets of landing gears on one side of the bottom of the drone, and the protective frame is made of aluminum alloy.

[0021] Preferably, the production cost of aluminum alloy protective frames is lower than that of carbon fiber landing gear, and aluminum alloy protective frames are more wear-resistant than carbon fiber landing gear.

[0022] In summary, the present invention has the following main advantages: This invention solves the problem of frequent replacement of drone landing gear due to impact and friction damage caused by rapid descent by setting up a drone, landing gear, protective frame, fixed plate, load-bearing plate, and connecting plate. When the drone rapidly lands on the ground, the ground impact load acts on the landing gear. The protective frame installed at the bottom of the landing gear can transfer the bending moment of the landing gear on one side to the other side through the connecting plate bolted to one side, so that the landing gear on both sides of the bottom of the drone shares the load, thereby reducing the degree of bending of the landing gear under stress. Furthermore, during the landing process, the landing gear comes into contact with the ground through the protective frame at its bottom, thus avoiding wear and tear on the carbon fiber landing gear.

[0023] This invention, by setting up a protective frame, curved plates, and side skirts, ensures that if the drone tilts slightly during descent, the side skirts on the curved wall will contact the ground first, thereby reducing the impact damage from the ground to the sides of the protective frame. Furthermore, the side skirts increase the contact area between the protective frame and the ground, thus dispersing the impact load from the ground on the protective frame. The curved plates, which are integrally fixed at both ends of the protective frame, allow the drone to glide smoothly over uneven ground during takeoff and landing, enhancing the drone's flexibility in taking off and landing in complex terrain. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall device of this utility model; Figure 2 This is a schematic diagram of the landing gear installation of this utility model; Figure 3This is a schematic diagram of the installation of the protective frame of this utility model; Figure 4 This is a schematic diagram of the landing gear of this utility model; Figure 5 This is a structural diagram of the protective frame of this utility model; Figure 6 This is a schematic diagram of the welding of the wear-resistant column of this utility model.

[0025] Explanation of reference numerals in the attached figures: 1. Unmanned aerial vehicle (UAV); 2. Landing gear; 201. Mounting plate; 3. Protective frame; 301. Curved plate; 302. Fixing plate; 303. Load-bearing plate; 304. Side skirt; 305. Wear-resistant column; 4. Connecting plate. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of this utility model will be described below based on its overall structure.

[0028] First embodiment: Please refer to Figure 1 — Figure 5 The system includes a drone 1 and landing gear 2. Two sets of landing gear 2 are installed on both sides of the bottom of the drone 1. A mounting plate 201 is fixed to the top of the landing gear 2, and a protective frame 3 is installed at the bottom of the landing gear 2. Two sets of fixing plates 302 are welded and fixed to the top of the protective frame 3. A stress plate 303 is fixed to one side of the top of the protective frame 3, and the stress plate 303 is welded to the fixing plate 302. A connecting plate 4 is connected to one side of the top of the stress plate 303. This system solves the problem of frequent replacement of drone landing gear due to impact and friction damage caused by rapid descent. The drone 1 quickly lands on the ground, and the ground impact load acts on the landing gear 2. The protective frame 3 installed at the bottom of the landing gear 2 can transfer the bending moment of the landing gear 2 on one side of the drone 1 to the other side through the connecting plate 4 bolted to one side. This allows the landing gear 2 on both sides of the bottom of the drone 1 to share the load, thereby reducing the degree of bending of the landing gear 2 under the force. In addition, during the landing process, the landing gear 2 contacts and rubs against the ground through the protective frame 3 at its bottom, thereby preventing the carbon fiber landing gear 2 from being worn by contact with the ground.

[0029] For details regarding the above embodiments, please refer to [link / reference]. Figure 5The fixing plate 302 is L-shaped and is fixed to the bottom of the landing gear 2 by bolts. When the landing gear 2 is inserted into the interior of the fixing plate 302, the fixing plate 302 can fix the bottom of the landing gear 2 to the interior of the fixing plate 302 by bolts.

[0030] For details regarding the above embodiments, please refer to [link / reference]. Figure 3 and Figure 4 The shape of one side wall of the stress plate 303 matches that of one side wall of the landing gear 2. When the ground impacts the protective frame 3, the protective frame 3 will distribute and transmit the impact force to the landing gear 2 through its top wall and the stress plate 303, thereby reducing the stress generated by the ground impacting the landing gear 2.

[0031] For details regarding the above embodiments, please refer to [link / reference]. Figure 3 The length of the load-bearing plate 303 is equal to one-third of the total length of the landing gear 2 and the mounting plate 201. The area at the bottom of the landing gear 2, which is one-third of the total length, is the area where the UAV 1 generates the maximum bending moment during rapid descent. The connecting plate 4 can connect the two landing gears 2 into a whole to form a frame structure. The bending moment originally borne by one side is transferred to the other side through the connecting plate 4, so that the landing gears 2 on both sides of the bottom of the UAV 1 share the load, thereby reducing the maximum bending moment of a single landing gear 2.

[0032] For details regarding the above embodiments, please refer to [link / reference]. Figure 3 The protective frame 3 has arc-shaped plates 301 fixed at both ends, and the arc-shaped plates 301 are curved upward. The upward curved plates 301 enable the UAV 1 to smoothly glide over the unadjusted ground during take-off and landing, thereby enhancing the flexibility of the UAV 1 in complex terrain.

[0033] For details regarding the above embodiments, please refer to [link / reference]. Figure 5 Side skirts 304 are fixed on both sides of the protective frame 3. The corners of the side skirts 304 are rounded. The side skirts 304 increase the contact area between the protective frame 3 and the ground, thereby dispersing the impact load of the ground on the protective frame 3.

[0034] For details regarding the above embodiments, please refer to [link / reference]. Figure 3 The two ends of the connecting plate 4 are arc-shaped, and the arc-shaped wall surface at the end of the connecting plate 4 is in contact with the wall surface of the force plate 303. The arc-shaped design at both ends of the connecting plate 4 increases the contact area between the end of the connecting plate 4 and the force plate 303, thereby reducing the stress generated by the contact between the connecting plate 4 and the force plate 303.

[0035] For details regarding the above embodiments, please refer to [link / reference]. Figure 2The length of the protective frame 3 is greater than the distance between the two sets of landing gear 2 on one side of the bottom of the UAV 1. The protective frame 3 is made of 6061 aluminum alloy. The production cost of the protective frame 3 made of 6061 aluminum alloy is lower than that of the carbon fiber landing gear 2. In addition, the protective frame 3 made of 6061 aluminum alloy is more wear-resistant than the landing gear 2 made of carbon fiber.

[0036] Second embodiment: Please refer to Figure 6 The bottom of the protective frame 3 is welded with multiple sets of wear-resistant columns 305, and the wear-resistant columns 305 are set as semi-cylindrical. The wear-resistant columns 305 are made of tungsten carbide alloy semi-cylindrical bodies with a diameter of 2mm, and the spacing between the multiple sets of wear-resistant columns 305 is set to 2cm. When the drone 1 lands, the wear-resistant columns 305 at the bottom of the protective frame 3 will rub against the ground, which can reduce the wear on the bottom wall of the protective frame 3 and thus extend the service life of the protective frame 3.

[0037] In practical operation, the four sets of carbon fiber landing gear 2 are fixed to the bottom of the drone 1 by bolts through the mounting plate 201 integrally fixed on its top. Then, a protective frame 3 is placed on the bottom of the two sets of landing gear 2 on one side of the bottom of the drone 1, and the two sets of landing gear 2 are respectively inserted into the L-shaped fixing plate 302 fixed on the top of the protective frame 3. Then, the fixing plate 302 is bolted to the bottom of the landing gear 2, and the bottom of the stress plate 303 welded to one side of the protective frame 3 is bolted to the landing gear 2. The wall surface of the stress plate 303 is in close contact with the wall surface of the landing gear 2. After contact, a set of protective frames 3 are then fixedly fitted onto the landing gear 2 on the other side of the bottom of the drone 1. When protective frames 3 are installed on the bottom of both landing gear 3 on both sides of the bottom of the drone 1, the personnel then bolt the two ends of a set of connecting plates 4 to the load-bearing plate 303 on one side of the protective frame 3. If the drone 1 lands quickly on the ground, the ground impact load will act on the landing gear 2. The protective frame 3 installed on the bottom of the landing gear 2 can transfer the bending moment of the landing gear 2 on one side of the drone 1 to the other side through the connecting plate 4 bolted on one side, so that the landing gear 2 on both sides of the bottom of the drone 1 can share the load, thereby reducing the degree of bending of the landing gear 2 under the force.

[0038] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A landing gear for a vertical take-off and landing unmanned aerial vehicle (UAV), comprising a UAV (1) and a landing gear (2), characterized in that: The UAV (1) has two sets of landing gear (2) on both sides of its bottom. The top of the landing gear (2) is fixed with a mounting plate (201). The bottom of the landing gear (2) is provided with a protective frame (3). The top of the protective frame (3) is welded and fixed with two sets of fixing plates (302). A stress plate (303) is fixed on one side of the top of the protective frame (3), and the stress plate (303) is welded to the fixing plate (302). A connecting plate (4) is connected to one side of the top of the stress plate (303).

2. The landing gear for a vertical takeoff and landing unmanned aerial vehicle according to claim 1, characterized in that: The fixing plate (302) is L-shaped and is fixed to the bottom of the landing gear (2) by bolts.

3. The landing gear for a vertical takeoff and landing unmanned aerial vehicle according to claim 1, characterized in that: The shape of one side wall of the load-bearing plate (303) matches that of one side wall of the landing gear (2).

4. The landing gear for a vertical takeoff and landing unmanned aerial vehicle according to claim 1, characterized in that: The length of the load-bearing plate (303) is equal to one-third of the total length of the landing gear (2) and the mounting plate (201).

5. The landing gear for a vertical takeoff and landing unmanned aerial vehicle according to claim 1, characterized in that: The protective frame (3) has arc-shaped plates (301) fixed at both ends, and the arc-shaped plates (301) are curved upwards.

6. The landing gear for a vertical takeoff and landing unmanned aerial vehicle according to claim 1, characterized in that: The protective frame (3) is fixed with side skirts (304) on both sides, and the corners of the side skirts (304) are rounded.

7. The landing gear for a vertical takeoff and landing unmanned aerial vehicle according to claim 1, characterized in that: The two ends of the connecting plate (4) are arc-shaped, and the arc-shaped wall surface at the end of the connecting plate (4) is in contact with the wall surface of the force plate (303).

8. The landing gear for a vertical takeoff and landing unmanned aerial vehicle according to claim 1, characterized in that: The length of the protective frame (3) is greater than the distance between the two sets of landing gear (2) on one side of the bottom of the UAV (1), and the protective frame (3) is made of 6061 aluminum alloy.

9. The landing gear for a vertical takeoff and landing unmanned aerial vehicle according to claim 1, characterized in that: The bottom of the protective frame (3) is fixed with multiple sets of wear-resistant columns (305). The wear-resistant columns (305) are set as semi-cylinders and the diameter of the wear-resistant columns (305) is set to 2mm.

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