A kind of collision net recovery structure

Abstract

The present invention relates to a net-collision recovery structure in the field of drone technology, comprising: a center frame, which is mounted on a fuselage and moves as a whole through any mesh of a recovery net when the drone hits the net for recovery; at least two hook rods, which are rotatably connected to the center frame, each hook rod is provided with a spring, and the rod body of the hook rod is connected to the side of the center frame through the spring, and when the drone hits the net for recovery, all the hook rods move through any mesh of the recovery net; a restraining frame, which restrains all the hook rods before the drone hits the net for recovery; wherein, when the drone hits the net for recovery, the restraining frame is hit by the recovery net and slides in the reverse direction along the hook rods so as to separate, so that all the hook rods rotate outward under the elastic force of the spring so that the free ends of the hook rods hook the recovery net. This allows the drone to be firmly and quickly hooked and locked on the recovery net after hitting the recovery net.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicles, in particular to a net-collision recovery structure for recovering unmanned aerial vehicles. Background Art

[0002] At present, drone net recovery technology has been widely used in the drone field. After a drone collides with or lands on the recovery net, the recovery net will give the drone a reaction force to cause the drone to rebound. At this time, if the drone breaks away from the recovery net, it will easily cause damage to the drone. Summary of the invention

[0003] The purpose of the present invention is to provide a net-collision recovery structure, which can enable a drone to firmly and quickly hook and lock on the recovery net after colliding with the recovery net, so as to avoid the risk of the drone escaping from the recovery net at the moment of recovery.

[0004] The object of the present invention is achieved in this way: a collision net recovery structure, comprising:

[0005] The center frame is installed on the fuselage and can move as a whole through any mesh of the recovery net when the UAV hits the net for recovery;

[0006] At least two hook rods, one end of the hook rod is used as a rotation connection end and is rotationally connected to the center frame, and the other end of the hook rod is used as a free end, each hook rod is equipped with a spring, and the rod body of the hook rod is connected to the side of the center frame through the spring, and when the drone hits the net for recovery, all the hook rods move through any mesh of the recovery net;

[0007] A restraining frame, which restrains all hooks before the drone crashes into the net for recovery;

[0008] When the UAV hits the recovery net, the restraining frame is hit by the recovery net and slides in the opposite direction along the hook rod to separate, so that all the hook rods rotate outward under the elastic force of the spring so that the free ends of the hook rods hook the recovery net.

[0009] Furthermore, the head of the center frame is configured as the conical part that first contacts the recovery net, the tip of the conical part points to the recovery net when recovering the drone, and the center frame is configured as an axis-like part and is coaxial with the conical part.

[0010] Furthermore, all hook rods are arranged around the axis of the center frame.

[0011] Furthermore, the restraining frame includes a restraining ring, and the restraining ring covers all the hook rods on its inner circle side before the drone hits the net for recovery, and the inner diameter of the restraining ring is larger than any mesh of the recovery net.

[0012] Furthermore, the restraining frame further comprises at least two extension rods, one end of which is fixedly connected to the outer circumferential side of the restraining ring and extends outwardly in the radial direction of the restraining ring.

[0013] Furthermore, two extension rods are provided, and the two extension rods are located at two opposite positions on the outer circle side of the restraining ring.

[0014] Furthermore, the main body of the center frame is set as a main shaft, a head seat of a rotating body structure is coaxially set at the head of the main shaft, the conical part is coaxially set on the head seat, and the maximum radius of the head seat is greater than the cross-sectional circle radius of the main shaft.

[0015] Furthermore, each hook rod is correspondingly provided with a rotating central axis, and the rotating connecting end of the hook rod is rotatably connected to the head seat through the rotating central axis, and the rotating connecting end of the hook rod and the rotating central axis do not exceed the outer peripheral wall of the head seat, and the axis of the rotating central axis is perpendicular to the axis of the main shaft.

[0016] Furthermore, at least two installation clearance grooves matching the hook rods are arranged on the head seat, and the rotating connection end of each hook rod is movably inserted into the corresponding installation clearance groove and is rotatably arranged in the installation clearance groove through the corresponding rotating central pivot.

[0017] Furthermore, the opening of the installation clearance groove is connected to the tail end surface and the outer peripheral surface of the head seat.

[0018] The beneficial effects of the present invention are:

[0019] 1. After the drone hits or lands on the recovery net, it can be firmly and quickly hooked and locked on the recovery net to avoid the risk of the drone escaping from the recovery net at the moment of recovery. Before the drone hits the net for recovery, the tie ring puts all the hook rods on its inner circle side so that the hook rod compresses the spring and the spring accumulates a certain amount of elastic potential energy. When the drone hits the recovery net, the tie ring and the extension rod contact the recovery net at the same time. At the same time, the head seat, the main shaft and the hook rod pass through any mesh in the recovery net together. At this time, the tie ring and the extension rod slide in the opposite direction relative to the hook rod so that the tie ring slips off the hook rod. When the tie ring slips off the hook rod, the hook rod has completely penetrated the recovery net. At the same time, under the elastic force of the spring, all the hook rods quickly rotate outward to open so that the free end of the hook rod can hook the recovery net, thereby achieving the purpose of recovering the drone.

[0020] 2. The structure of the present invention can be used repeatedly and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the network collision state of the present invention.

[0023] Figure 3 It is a schematic diagram of the state of the present invention after the collision net recovery is completed.

[0024] Figure 4 It is a three-dimensional structural schematic diagram of the present invention.

[0025] Figure 5 It is a schematic diagram of Example 1.

[0026] Figure 6 It is a schematic diagram of Example 2.

[0027] In the figure, 1 is a head seat, 1a is a conical part, 1b is a mounting groove, 2 is a hook rod, 3 is a rotating central axis, 4 is a spring, 5 is a restraining ring, 6 is an extension rod, 7 is a main shaft, 8 is a recovery net, 8a is a mesh, and 9 is a fuselage. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-6 The present invention is further illustrated with reference to the accompanying drawings and specific embodiments.

[0029] Combination Figure 1-4 As shown, a net recovery structure is installed on the fuselage 9, including:

[0030] The center frame is mounted on the fuselage 9 and moves as a whole through any mesh 8a of the recovery net 8 when the UAV hits the net for recovery;

[0031] Two hook rods 2, one end of the hook rod 2 is used as a rotation connection end and is rotationally connected to the center frame, and the other end of the hook rod 2 is used as a free end. Each hook rod 2 is equipped with a spring 4, and the rod body of the hook rod 2 is connected to the side of the center frame through the spring 4. When the drone hits the net for recovery, all the hook rods 2 move through any mesh 8a of the recovery net 8;

[0032] The restraint frame restrains all hooks 2 before the drone crashes into the net for recovery.

[0033] When the UAV hits the net for recovery, the restraining frame is hit by the recovery net 8 and slides in the opposite direction along the hook rod 2 so as to separate, so that all the hook rods 2 rotate outward under the elastic force of the spring 4 so that the free end of the hook rod 2 hooks the recovery net 8.

[0034] The head of the above-mentioned center frame is configured as the conical part 1a that first contacts the recovery net 8. The tip of the conical part 1a points to the recovery net 8 when recovering the drone. The conical part 1a plays a good guiding and positioning role, so that the center frame can smoothly pass through any mesh 8a of the recovery net 8. The center frame is configured as an axis-like part and is coaxial with the conical part 1a; all hooks 2 are arranged around the axis of the center frame; the main body of the center frame is configured as a main shaft 7, and a head seat 1 of a rotating body structure is coaxially arranged at the head of the main shaft 7, and the conical part 1a is coaxially arranged on the head seat 1. The maximum radius of the head seat 1 is greater than the cross-sectional circle radius of the main shaft 7. As long as the head seat 1 passes through any one of the recovery nets 8 The main shaft 7 will inevitably pass through any mesh 8a of the recovery net 8; each hook rod 2 is correspondingly provided with a rotating central axis 3, and the rotating connecting end of the hook rod 2 is rotatably connected to the head seat 1 through the rotating central axis 3, and the rotating connecting end of the hook rod 2 and the rotating central axis 3 do not exceed the outer peripheral wall of the head seat 1, and do not interfere with the process of the head seat 1 penetrating the mesh 8a. The axis of the rotating central axis 3 is perpendicular to the axis of the main shaft 7. Therefore, after the hook rod 2 is released, the distance between the free ends of the two hook rods 2 is greater than the diameter of the mesh 8a, so that the two hook rods 2 can smoothly hook the recovery net 8. At this time, the two hook rods 2 are opened outward at a certain angle based on the axis of the main shaft 7.

[0035] Two mounting clearance grooves 1b are arranged on the head seat 1, which are matched with the hook rods 2 one by one. The rotating connection end of each hook rod 2 is movably inserted into the corresponding mounting clearance groove 1b, and is rotatably arranged in the mounting clearance groove 1b through the corresponding rotating central axis 3; the opening of the mounting clearance groove 1b is connected with the rear end face and the outer peripheral surface of the head seat 1, so that the rotation movement of the hook rod 2 is not hindered after the restraint is released.

[0036] The above-mentioned restraining frame includes a restraining ring 5. Before the UAV hits the net for recovery, all the hook rods 2 are covered on the inner circle side of the restraining ring 5. The inner diameter of the restraining ring 5 is larger than any mesh 8a of the recovery net 8 to ensure that the restraining ring 5 will not pass through the mesh 8a when hitting the recovery net 8. The restraining frame also includes two extension rods 6. One end of the extension rod 6 is fixedly connected to the outer circle side of the restraining ring 5 and extends outward along the radial direction of the restraining ring 5. The two extension rods 6 are located at two opposite positions on the outer circle side of the restraining ring 5. The extension rods 6 can increase the contact range between the restraining frame and the recovery net 8, so that the entire restraining frame can be quickly blocked by the recovery net 8, thereby increasing the reliability of the design.

[0037] The basic principle is as follows: before the UAV hits the net for recovery, the restraining ring 5 puts all the hook rods 2 on its inner circle side so that the hook rod 2 compresses the spring 4, allowing the spring 4 to accumulate a certain amount of elastic potential energy. When the UAV hits the recovery net 8, the restraining ring 5 and the extension rod 6 contact the recovery net 8 at the same time. At the same time, the head seat 1, the main shaft 7, and the hook rod 2 pass through any mesh 8a in the recovery net 8 together. At this time, the restraining ring 5 and the extension rod 6 slide in the opposite direction relative to the hook rod 2, so that the restraining ring 5 slips off the hook rod 2. When the restraining ring 5 slips off the hook rod 2, the hook rod 2 has completely penetrated the recovery net 8. At the same time, under the elastic force of the spring 4, all the hook rods 2 quickly rotate outward to open, so that the free end of the hook rod 2 can hook the recovery net 8, thereby completing the recovery operation of the UAV after hitting the net.

[0038] Example 1

[0039] like Figure 5 As shown, the net-hitting recovery structure is installed at the head of the fuselage 9, and the center frame extends forward as a whole, so that the conical part 1a of the head seat 1 is at the frontmost side. When the net-hitting recovery is performed, the recovery net 8 is in an upright state, so that the center frame is perpendicular to the recovery net 8, and the head of the fuselage 9 gives the recovery net 8 a strong impact force, but at the same time, the binding ring 5 and the extension rod 6 slide in the opposite direction relative to the hook rod 2, that is, the binding ring 5 and the extension rod 6 slide backward to make the binding ring 5 slip off the hook rod 2. When the binding ring 5 slips off the hook rod 2, the hook rod 2 has completely penetrated the recovery net 8 forward. At the same time, under the elastic force of the spring 4, all the hook rods 2 quickly rotate outward to open, so that the free end of the hook rod 2 can hook the recovery net 8, thereby completing the net-hitting recovery operation of the drone.

[0040] Example 2

[0041] like Figure 6 As shown, the net-collision recovery structure is installed on the landing gear directly below the fuselage 9, and three sets are arranged. The center frame extends downward as a whole, so that the conical part 1a of the head seat 1 is at the lowest side. When the UAV lands, the recovery net 8 is in a flat state, so that the center frame is perpendicular to the recovery net 8. Under the weight of the fuselage 9, the landing gear gives the recovery net 8 a certain impact force. At the same time, the binding ring 5 and the extension rod 6 slide in the opposite direction relative to the hook rod 2, that is, the binding ring 5 and the extension rod 6 slide upward, so that the binding ring 5 slips off the hook rod 2. When the binding ring 5 slips off the hook rod 2, the hook rod 2 has completely penetrated the recovery net 8 downward. At the same time, under the elastic force of the spring 4, all the hook rods 2 quickly rotate outward to open, so that the free end of the hook rod 2 can hook the recovery net 8, thereby completing the net-collision recovery operation of the UAV.

[0042] The above are preferred embodiments of the present invention. A person skilled in the art may make various changes or improvements on this basis. Without departing from the general concept of the present invention, these changes or improvements should fall within the scope of protection required by the present invention.

Claims

1. A net-collision recovery structure, characterized in that: include: A center frame is mounted on the fuselage (9) and can move as a whole through any mesh hole (8a) of the recovery net (8) when the UAV hits the net for recovery; At least two hook rods (2), one end of the hook rod (2) serving as a rotational connection end and rotationally connected to a central frame, the other end of the hook rod (2) serving as a free end, each hook rod (2) being provided with a spring (4), the rod body of the hook rod (2) being connected to the side of the central frame via the spring (4), and all the hook rods (2) movingly passing through any mesh (8a) of the recovery net (8) when the drone crashes into the net for recovery; A restraining frame, which restrains all hooks (2) before the drone hits the net for recovery; When the UAV hits the net for recovery, the restraining frame is hit by the recovery net (8) and slides in the reverse direction along the hook rod (2) so as to separate, so that all the hook rods (2) rotate outward under the elastic force of the spring (4) so ​​that the free ends of the hook rods (2) hook the recovery net (8); The head of the center frame is configured as the conical part (1a) that first contacts the recovery net (8), the tip of the conical part (1a) points to the recovery net (8) when recovering the drone, and the center frame is configured as an axis-like part and is coaxial with the conical part (1a); The restraining frame comprises a restraining ring (5), wherein the restraining ring (5) covers all hook rods (2) on its inner circle side before the drone hits the net for recovery, and the inner diameter of the restraining ring (5) is larger than any mesh (8a) of the recovery net (8).

2. A net recovery structure according to claim 1, characterized in that: All hook rods (2) are arranged around the axis of the center frame.

3. A net recovery structure according to claim 1, characterized in that: The restraining frame further comprises at least two extension rods (6), one end of which is fixedly connected to the outer circumferential side of the restraining ring (5) and extends outwardly in the radial direction of the restraining ring (5).

4. A net recovery structure according to claim 3, characterized in that: Two extension rods (6) are provided, and the two extension rods (6) are located at two opposite positions on the outer circle side of the restraining ring (5).

5. A net recovery structure according to claim 2, characterized in that: The main body of the center frame is arranged as a main shaft (7), a head seat (1) of a rotating body structure is coaxially arranged at the head of the main shaft (7), the conical part (1a) is coaxially arranged on the head seat (1), and the maximum radius of the head seat (1) is greater than the cross-sectional circle radius of the main shaft (7).

6. A net recovery structure according to claim 5, characterized in that: Each hook rod (2) is correspondingly provided with a rotating central axis (3), and the rotating connection end of the hook rod (2) is rotatably connected to the head seat (1) via the rotating central axis (3), and the rotating connection end of the hook rod (2) and the rotating central axis (3) do not extend beyond the outer peripheral wall of the head seat (1), and the axis of the rotating central axis (3) is perpendicular to the axis of the main shaft (7).

7. A net recovery structure according to claim 6, characterized in that: At least two mounting clearance grooves (1b) are arranged on the head seat (1) and are matched with the hook rods (2) one by one. The rotating connection end of each hook rod (2) is movably inserted into the corresponding mounting clearance groove (1b) and is rotatably arranged in the mounting clearance groove (1b) through the corresponding rotating central axis (3).

8. A net recovery structure according to claim 7, characterized in that: The opening of the installation clearance groove (1b) is connected to the tail end surface and the outer peripheral surface of the head seat (1).

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