Unmanned aerial vehicle net recovery device and unmanned aerial vehicle

Abstract

The application discloses a UAV net hanging and recycling device and a UAV, wherein the net hanging and recycling device comprises a hook, a rope and a net; the hook is connected to the top end of a UAV tail wing; one end of the rope is fixedly connected to the hook, and the other end of the rope is fixedly connected to a force bearing structure of a UAV body; the net is arranged at a preset recycling site and can capture the hook, so that the hook can be separated from the UAV tail wing. The application solves the technical problem that in the prior art, the hook is fixedly arranged on a wing, and when recycling, the impact force is concentrated on a local structure, which can easily cause fatigue damage or deformation of the local structure and further affect flight safety, realizes that the main body structure of the UAV body bears force when recycling, avoids that local stress concentration causes fatigue damage or deformation of a local structure, and ensures flight safety.

Description

Technical Field

[0001] This application relates to the field of drone recycling technology, and in particular to a drone netting recycling device and a drone. Background Technology

[0002] Existing methods for recovering small drones mainly include: net-crashing recovery: relying on ground-based barrier nets, but direct collisions with the drone can easily cause structural damage; parachute recovery: landing randomly after the parachute opens, easily affected by wind and unable to be accurately recovered; skid / landing gear landing: requires a flat site and is not suitable for complex terrain.

[0003] There are obvious technical pain points in the existing technology, namely that traditional hooks are mostly fixed to the wings, and the impact force is concentrated on the local structure during recovery. Repeated recovery can easily lead to fatigue or deformation of the local structure, affecting flight safety. Utility Model Content

[0004] This application provides a drone net recovery device and a drone, which solves the technical problem in the prior art where the hooks are mostly fixed to the wings, and the impact force is concentrated in a local structure during recovery, which can easily cause fatigue damage or deformation of the local structure and thus affect flight safety. It realizes the load-bearing capacity of the main fuselage structure during recovery, avoids local stress concentration that causes fatigue damage or deformation of the local structure, and ensures flight safety.

[0005] In a first aspect, this utility model provides a drone netting recovery device, including a hook, a rope, and a net; the hook is connected to the top of the drone's tail fin; one end of the rope is fixedly connected to the hook, and the other end of the rope is fixedly connected to the drone's load-bearing structure; the net is set at a preset recovery site and can capture the hook, so that the hook can be separated from the drone's tail fin.

[0006] In conjunction with the first aspect, in one possible implementation, the hook includes a hook body and an elastic buckle; the hook body is connected to the top of the tail fin of the drone; one end of the rope is fixedly connected to the hook body; the elastic buckle is disposed at the hook end of the hook body, and can form a one-way open closed space with the hook end of the hook body, so that after the net contacts the hook, the net can enter the closed space and be captured.

[0007] In conjunction with the first aspect, one possible implementation also includes a tearing plate; the tearing plate is fixedly connected between the hook and the tip of the drone tail fin, and can be torn apart after the hook is captured, so that the hook can be smoothly separated from the drone tail fin.

[0008] In conjunction with the first aspect, in one possible implementation, the hook body has a connecting hole; one end of the rope is fixedly connected to the connecting hole.

[0009] In conjunction with the first aspect, one possible implementation also includes multiple attachment points; the rope is connected to the drone body through the multiple attachment points.

[0010] In conjunction with the first aspect, in one possible implementation, two mounting points are provided on the fuselage of one of the drones, along the length of the drone fuselage, on one side of the tail fin.

[0011] In conjunction with the first aspect, in one possible implementation, the rope is secured to the tail fin and the outside of the drone fuselage via self-adhesive fasteners.

[0012] In conjunction with the first aspect, in one possible implementation, the rope includes a first rope and a second rope; one end of the first rope and the second rope overlaps and is fixedly connected to the hook; the other ends of the first rope and the second rope are separated and fixedly connected to two corresponding hanging points; a fork point is fixedly provided between the first rope and the second rope.

[0013] In conjunction with the first aspect, in one possible implementation, the projection of the midpoint of the line connecting the two attachment points onto the vertical plane coincides with the center of gravity of the UAV body.

[0014] Secondly, this utility model embodiment provides a drone, including the drone body and the aforementioned net-hanging recovery device.

[0015] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:

[0016] This embodiment of the invention employs a hook, a rope, and a net. The hook is connected to the top of the drone's tail fin. One end of the rope is fixedly connected to the hook, and the other end is fixedly connected to the drone's load-bearing structure. The net is placed at a pre-designated recovery site, enabling the hook to be captured and separated from the drone's tail fin. This effectively solves the technical problem in the prior art where hooks are mostly fixed to the wing, causing impact force to concentrate on a local structure during recovery, which can easily lead to fatigue damage or deformation of the local structure and thus affect flight safety. This invention ensures that the main fuselage structure can bear the load during recovery, avoids local stress concentration that could cause fatigue damage or deformation of the local structure, and guarantees flight safety. Attached Figure Description

[0017] 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 of this utility model 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 based on these drawings without creative effort.

[0018] Figure 1 A side view of a drone net-attachment and recovery device installed on a drone, as provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram showing the connection between the hook and the tail fin of a drone provided in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the structure after the rope is connected to the drone body, as provided in an embodiment of this application.

[0021] Figure 4 This is a schematic diagram illustrating the state of the drone before it is captured, as provided in an embodiment of this application.

[0022] Figure 5 This is a schematic diagram illustrating the state of a drone when it comes into contact with a net, as provided in an embodiment of this application.

[0023] Figure 6 This is a schematic diagram illustrating the state of a drone when it is captured and suspended, as provided in an embodiment of this application.

[0024] Icons: 1-Hook; 11-Hook body; 111-Connecting hole; 12-Elastic buckle; 2-Rope; 21-First rope; 22-Second rope; 23-Bifurcation point; 3-Hanging net; 4-Drone tail wing; 5-Drone body; 6-Tear plate; 7-Hanging point. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0026] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "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; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0027] Reference Figure 1 , Figure 3 This utility model provides a drone net recovery device, including a hook 1, a rope 2 and a net 3; the hook 1 is connected to the top of the drone tail 4; one end of the rope 2 is fixedly connected to the hook 1, and the other end of the rope 2 is fixedly connected to the load-bearing structure of the drone body 5; the net 3 is set in a preset recovery site and can capture the hook 1, so that the hook 1 can be separated from the drone tail 4. Specifically, in this embodiment, the hook 1 can be attached to the top of the drone tail wing 4 by adhesive bonding, or it can be pre-attached to the top of the drone tail wing 4 by snap-fit ​​(the snap-fit ​​structure can be a protrusion fixedly provided below the hook 1, and a groove that engages with the protrusion is provided at the top of the drone tail wing 4. Before the hook 1 is captured by the net 3, the hook 1 can be connected to the top of the drone tail wing 4 through this snap-fit ​​structure. After the hook 1 is captured, the protrusion can be pulled out of the groove and thus separated). Before the drone is recovered, when the hook 1 is captured by the net 3, the hook 1 can then separate from the drone tail wing 4 due to the impact force of inertia. Afterwards, the hook 1 pulls the load-bearing structure of the drone body 5 through the rope 2, and finally the drone is successfully recovered. In this embodiment, the net 3 needs to be set up in advance on the preset recovery site. Before the drone is recovered, it approaches the net 3 at a 3° glide angle. In this embodiment, the hook 1 is forged from titanium alloy, and the rope 2 is made of paracord. The hook 1 and rope 2 are installed on both tail wings of the drone to improve reliability. The tension direction of the rope 2 is consistent with the longitudinal axis of the drone body 5, which can reduce the impact of pitch moment. During the recovery process, the hook 1 falls off from the top of the drone tail wing 4 to avoid damage to the wingtip of the drone tail wing 4.

[0028] Reference Figure 2 The hook 1 includes a hook body 11 and an elastic buckle 12. The hook body 11 is connected to the top of the drone tail wing 4. One end of the rope 2 is fixedly connected to the hook body 11. The elastic buckle 12 is set at the hook end of the hook body 11 and can form a one-way open closed space with the hook end of the hook body 11. After the net 3 contacts the hook 1, the net 3 can enter the closed space and be captured. The elastic buckle 12 in this embodiment is a conventional structure in the art. It can open inward to the hook body 11 after being subjected to force, and automatically spring back and abut against one side of the hook body 11 when not subjected to force, thereby forming a one-way open closed space (one-way here refers to the inward direction of the hook body 11). In this embodiment, the drone tail wing 4 specifically refers to the drone vertical tail wing. Before the drone is recovered, it approaches the net 3 at a 3° glide angle. When the hook 1 at the top of the drone vertical tail wing hits the capture rope on the net 3, due to the inertia of motion and the certain force of the leading edge of the vertical tail wing, the net 3 can be captured. With the sweep angle, the capture rope will slide along the leading edge of the vertical tail fin from the point of impact to the wingtip until it slides into the hook body 11. As it slides towards the opening of the hook body 11, the elastic buckle 12 automatically opens under the pressure of the capture rope, and the capture rope slides into the hook groove of the hook body 11 until the inner bottom. At the same time, the elastic buckle 12 rebounds to its initial state under the action of the rebound force, ensuring that the capture rope cannot be hooked, so that the hook 1 is locked on the capture rope on the net 3. Under the traction of the rope 2, the hook 1 falls off the wingtip of the UAV tail fin 4. After the rope 2 is fully extended, it tightens and releases the force to stop the UAV, thus completing the safe recovery of the UAV. Compared with the traditional wing hook 1, the recovery loss in this embodiment can be reduced by more than 60%; the maximum allowable net landing speed is 35m / s, which is suitable for the recovery of fixed-wing UAVs weighing 5-25kg; in this embodiment, the distance between the upper and lower adjacent capture ropes on the net is the same as or slightly less than the height of the UAV to ensure the success rate of the UAV being netted.

[0029] Reference Figure 2 The hook 1 also includes a tearing plate 6; the tearing plate 6 is fixedly connected between the hook 1 and the top of the drone tail 4, and can be torn open after the hook 1 is captured, so that the hook 1 and the drone tail 4 can be separated smoothly. Specifically, in this embodiment of the application, a tearing plate 6 is provided between the hook 1 and the top of the drone tail 4, so that the tearing plate 6 can be torn open after the hook 1 is captured, so that the hook 1 and the drone tail 4 can be separated smoothly.

[0030] Reference Figure 2 The hook body 11 has a connecting hole 111; one end of the rope 2 is fixedly connected to the connecting hole 111. Specifically, in this embodiment, the hook body 11 has a connecting hole 111, and the rope 2 is fixedly connected to the hook body 11 through the connecting hole 111. Alternatively, a lug or connecting ring can be provided on the hook body 11, and the rope 2 can be fixedly connected to the hook body 11 through the lug or connecting ring.

[0031] Reference Figure 1 , Figure 3 It also includes multiple attachment points 7; the rope 2 is connected to the drone body 5 through multiple attachment points 7. Specifically, in this embodiment, the drone body 5 can be provided with multiple attachment points 7, preferably four attachment points 7, which are respectively arranged in pairs on the upper sides of the drone body 5. The attachment points 7 are selected from the structure of hanging ears or hanging rings, as long as they can fix the rope 2 to the drone body 5.

[0032] Reference Figure 3 Two attachment points 7 are provided along the length of the drone body 5 on one side of one of the drone tail fins 4. Specifically, in this embodiment, two attachment points 7 are provided on both sides of the drone body opposite the two tail fins. Similarly, ropes 2 are provided on both tail fins, and the ropes 2 are connected to the corresponding two attachment points 7 to ensure the reliability and stability of the drone during recovery. Specifically, the ropes 2 are fixed to the outside of the drone tail fin 4 and the drone body 5 by self-adhesive fasteners.

[0033] Reference Figure 6 The rope 2 includes a first rope 21 and a second rope 22; one end of the first rope 21 and the second rope 22 overlaps and is fixedly connected to the hook 1; the other ends of the first rope 21 and the second rope 22 are separated and fixedly connected to two corresponding hanging points 7; a fork point 23 is fixedly provided between the first rope 21 and the second rope 22. Specifically, in order to further ensure the stability of the force when the drone is recovered and when it is suspended after recovery, the rope 2 is set as a first rope 21 and a second rope 22, and a fork point 23 is provided on the first rope 21 and the second rope 22. The distance from the fork point 23 to the two corresponding hanging points 7 is equal, so that after the drone is recovered and suspended, the fork point 23 and the two corresponding hanging points 7 form an isosceles triangle.

[0034] Reference Figure 6 The projection of the midpoint of the line connecting the two attachment points 7 onto the vertical plane coincides with the center of gravity of the drone body 5. In this embodiment, the projection of the midpoint of the line connecting the two attachment points 7 onto the vertical plane coincides with the center of gravity of the drone body 5, so that the drone is stable under force when it is recovered and suspended.

[0035] This utility model embodiment also provides a drone, including the drone body and the above-mentioned net-hanging and recovery device.

[0036] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0037] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. An unmanned aerial vehicle netting recovery apparatus, comprising: Includes hooks (1), ropes (2), and netting (3); The hook (1) is connected to the top of the tail fin (4) of the UAV; One end of the rope (2) is fixedly connected to the hook (1), and the other end of the rope (2) is fixedly connected to the load-bearing structure of the UAV body (5); The net (3) is set at a preset recycling site and can capture the hook (1), so that the hook (1) can be separated from the tail fin (4) of the UAV.

2. The unmanned aerial vehicle net recovery apparatus of claim 1, wherein, The hook (1) includes a hook body (11) and an elastic buckle (12); The hook (11) is connected to the top of the tail fin (4) of the UAV; One end of the rope (2) is fixedly connected to the hook body (11); The elastic buckle (12) is provided at the hook end of the hook body (11) and can form a one-way open closed space with the hook end of the hook body (11). After the net (3) contacts the hook (1), the net (3) can enter the closed space and be captured.

3. The unmanned aerial vehicle net recovery apparatus of claim 1, wherein, It also includes a tear plate (6); The tear plate (6) is fixedly connected between the hook (1) and the top of the drone tail wing (4), and can be torn open after the hook (1) is captured, so that the hook (1) and the drone tail wing (4) can be separated smoothly.

4. The unmanned aerial vehicle net recovery apparatus of claim 2, wherein, The hook body (11) is provided with a connecting hole (111); One end of the rope (2) is fixedly connected to the connecting hole (111).

5. The drone net recovery apparatus of claim 1, wherein, It also includes multiple hanging points (7); The rope (2) is connected to the drone body (5) through multiple hanging points (7).

6. The drone net recovery apparatus of claim 5, wherein, Two mounting points (7) are provided on the fuselage (5) of one of the drone tail wings (4) along the length of the drone fuselage (5).

7. The drone net recovery apparatus of claim 1, wherein, The rope (2) is fixed to the outside of the UAV tail wing (4) and the UAV body (5) by self-adhesive fasteners.

8. The unmanned aerial vehicle net recovery apparatus of claim 5, wherein, The rope (2) includes a first rope (21) and a second rope (22); One end of the first rope (21) and the second rope (22) overlaps and is fixedly connected to the hook (1); The other ends of the first rope (21) and the second rope (22) are separated and fixedly connected to the corresponding two hanging points (7); A fork point (23) is fixedly provided between the first rope (21) and the second rope (22).

9. The drone net recovery apparatus of claim 8, wherein, The projection of the midpoint of the line connecting the two hanging points (7) onto the vertical plane coincides with the center of gravity of the UAV body (5).

10. An unmanned aerial vehicle (UAV) comprising an UAV body (5) and a net-hanging recovery device as described in any one of claims 1-9.

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