Undercarriage device of unmanned aerial vehicle

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle undercarriage device which comprises a connecting plate, four fixing blocks, a connecting shaft and supporting plates, the four fixing blocks are arranged on the connecting plate, the supporting plates are rotationally arranged on the fixing blocks through the connecting shaft, and the unmanned aerial vehicle undercarriage device further comprises volute spiral springs. And volute spiral springs for absorbing impact force are arranged at the rotating joints of the supporting plates and the adjacent connecting shafts. When the unmanned aerial vehicle lands, the supporting plate firstly makes contact with the ground, so that the supporting plate naturally rotates outwards under the impact force of the ground, at the moment, the volute spiral spring is stressed to deform, in the process, the volute spiral spring can absorb and relieve the impact force, and the stable buffering effect is provided for the landing process of the unmanned aerial vehicle; therefore, the unmanned aerial vehicle is effectively protected from being damaged by direct impact.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to an undercarriage device for an unmanned aerial vehicle. Background Art

[0002] An unmanned aerial vehicle is a flying vehicle without a crew on board, also known as an unmanned aerial vehicle. It utilizes advanced remote control technology, autonomous flight control systems, and sensor technology to perform various tasks in the air, such as reconnaissance, photography, cargo transportation, etc.

[0003] The bottom of the body of the unmanned aerial vehicle is provided with an undercarriage (bracket) for support. The existing undercarriages of unmanned aerial vehicles mainly have three forms: an integral bracket, a sled bracket, and a strut bracket. The integral bracket is suitable for light unmanned aerial vehicles; the sled bracket has a large static load; the strut bracket has good structural rigidity and a large load capacity. However, the above-mentioned undercarriages do not have shock absorption performance during use and have poor stability. When the unmanned aerial vehicle lands, due to its own weight, there is a large impact force during landing, which easily causes the unmanned aerial vehicle to tilt, and then damages the wings or the body, which is not conducive to the safe landing of the unmanned aerial vehicle.

[0004] Therefore, it is necessary to design an undercarriage device for an unmanned aerial vehicle. Summary of the Utility Model

[0005] In order to overcome the drawback that when the unmanned aerial vehicle lands, due to its own weight, there is a large impact force during landing, which easily causes the unmanned aerial vehicle to tilt, the utility model provides an undercarriage device for an unmanned aerial vehicle.

[0006] An undercarriage device for an unmanned aerial vehicle includes a connecting plate, fixing blocks, connecting shafts, and support plates. There are four fixing blocks on the connecting plate, and support plates are rotatably arranged on the fixing blocks through the connecting shafts. It also includes scroll springs, and scroll springs for absorbing impact forces are arranged at the rotational connection points of the support plates and the adjacent connecting shafts.

[0007] Furthermore, it also includes a first wire winding ring, a second wire winding ring, and a pull rope. The first wire winding ring is rotatably arranged at the bottom of the connecting plate, the second wire winding ring is rotatably arranged on the first wire winding ring, and two convex blocks are designed on the outer sides of the first wire winding ring and the second wire winding ring, and the four convex blocks are evenly spaced. Pull ropes are connected between two of the support plates and the convex blocks on the adjacent first wire winding ring, and pull ropes are connected between the other two support plates and the convex blocks on the adjacent second wire winding ring.

[0008] Furthermore, it also includes a motor. The motor is installed at the center position on the top of the connecting plate, and the output shaft of the motor penetrates through the middle of the connecting plate and is connected to the first wire winding ring.

[0009] Furthermore, it also includes strengthening blocks, and strengthening blocks are arranged at the lower parts of the support plates.

[0010] Furthermore, it further includes a limiting block, and a limiting block is connected to the side of the support plate close to the fixed block.

[0011] Furthermore, it further includes a limiting ring, and limiting rings are arranged at the bottoms of the fixed blocks, and the pulling ropes all pass through the limiting rings.

[0012] The beneficial effects and remarkable improvements of the present utility model are as follows:

[0013] When the drone lands, the support plate will first contact the ground, and thus will be subjected to the impact force of the ground and naturally rotate outwards. At this time, the scroll spring will be deformed by the force. In this process, the scroll spring can absorb and slow down this impact force, providing a stable buffering effect for the landing process of the drone, thereby effectively protecting the drone from the damage caused by direct impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the connecting plate, fixed block and connecting shaft of the present utility model.

[0016] Figure 3 It is a sectional view of the connecting shaft of the present utility model.

[0017] Figure 4 It is a sectional view of the connecting plate of the present utility model.

[0018] Figure 5 It is an exploded view of the present utility model.

[0019] Among them, the above-mentioned drawings include the following reference numerals: 1 - connecting plate, 2 - fixed block, 3 - connecting shaft, 4 - support plate, 5 - scroll spring, 6 - limiting block, 7 - first winding ring, 8 - second winding ring, 9 - limiting ring, 10 - pulling rope, 11 - motor, 12 - reinforcing block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The preferred technical solutions of the present utility model will be described in detail below with reference to the drawings.

[0021] Embodiment: An undercarriage device for a drone, refer to Figures 1 to 5, including a connecting plate 1, fixing blocks 2, connecting shafts 3, support plates 4, scroll springs 5, limit blocks 6, first winding rings 7, second winding rings 8, limit rings 9, pull ropes 10, motors 11 and reinforcement blocks 12. The left and right sides of the connecting plate 1 are connected with fixing blocks 2 in a front-back symmetric manner. Each fixing block 2 is fixedly connected with a connecting shaft 3. A support plate 4 is rotatably connected to the connecting shaft 3. There is a scroll spring 5 between the support plate 4 and the adjacent connecting shaft 3. When the drone lands and the support plate 4 first touches the ground, it will be impacted by the ground force and rotate outwards naturally. Under the action of the scroll spring 5, this impact force can be significantly reduced, providing a smooth buffering effect for the landing process of the drone, thereby protecting the drone from damage caused by direct impact. A limit block 6 is connected to the side of the support plate 4 close to the fixing block 2 to limit the rotation amplitude of the support plate 4. The center position of the bottom of the connecting plate 1 is rotatably connected with a first winding ring 7, and on the outside of the first winding ring 7, a second winding ring 8 is rotatably connected. The second winding ring 8 is rotatably connected to the bottom of the connecting plate 1. Two convex blocks are designed on the outside of both the first winding ring 7 and the second winding ring 8, and the four convex blocks are symmetrically and evenly spaced. When the convex block on the first winding ring 7 rotates to contact the convex block on the second winding ring 8, the second winding ring 8 will be pushed. A limit ring 9 is connected to the bottom of each fixing block 2. A pull rope 10 passes through the limit ring 9. The two ends of two of the pull ropes 10 are respectively connected between the adjacent support plate 4 and the convex block on the first winding ring 7, and the two ends of the other two pull ropes 10 are respectively connected between the adjacent support plate 4 and the convex block on the second winding ring 8. A motor 11 for providing power is installed at the center position of the top of the connecting plate 1. The output shaft of the motor 11 passes through the middle of the connecting plate 1 and is connected to the first winding ring 7. A reinforcement block 12 is connected to the lower part of the support plate 4. When the drone lands, the reinforcement block 12 can increase the footprint, thereby improving the stability of the drone when landing.

[0022] When the drone landing gear device needs to be used, first, the connecting plate 1 needs to be firmly installed at the bottom of the drone. After installation, the landing gear device is in the unfolded state initially. When the drone is ready for flight operations, the landing gear device can be folded.

[0023] The specific steps are as follows: Start the motor 11 to drive the first winding ring 7 and the bumps thereon to start rotating. When the bumps on the first winding ring 7 come into contact with the bumps on the second winding ring 8, the second winding ring 8 will be pushed and rotate synchronously. During this process, the first winding ring 7 will first pull the pull rope 10 connected to it and wind the pull rope 10 around itself. This action drives the support plate 4 connected to the pull rope 10 to rotate inwards along the connecting shaft 3, and at the same time, the scroll spring 5 is deformed under the pulling force. As the first winding ring 7 continues to rotate, the bumps thereon will successively drive each pull rope 10 to be pulled, so that each support plate 4 rotates along the connecting shaft 3 with the pulling of the pull rope 10, thus completing the folding of the two support plates 4. At the same time, when the second winding ring 8 is pushed by the bumps on the first winding ring 7, it also performs the same operation: pulling the connected pull rope 10, winding the pull rope 10 around itself, and driving the connected support plate 4 to fold, ensuring the smooth folding of the entire landing gear device. After the landing gear device is completely folded, turn off the motor 11. At this time, the drone can perform flight operations.

[0024] When the drone needs to land, the motor 11 can be started to run in reverse, driving the first winding ring 7 and the bumps thereon to start rotating in reverse. At this time, the restoring force of the scroll spring 5 and the first winding ring 7 rotating in reverse act together to drive the pull rope 10 to rotate in reverse and gradually release. As the first winding ring 7 continues to rotate in reverse, the pull rope 10 wound around it before is gradually released. This release process causes the support plate 4 connected to the pull rope 10 to rotate in reverse along the connecting shaft 3 under the action of the restoration of the scroll spring 5, thus gradually returning to the initial unfolded state.

[0025] At the same time, due to the design of the bump structure, the bumps on the first winding ring 7 will push the second winding ring 8 in reverse, causing the second winding ring 8 to also start rotating in reverse. During this process, the pull rope 10 on the second winding ring 8 is also released, and then drives the connected support plate 4 to rotate in reverse and unfold under the action of the restoration of the scroll spring 5. The synchronous operation of the first winding ring 7 and the second winding ring 8 ensures that the support plates 4 on both sides of the landing gear device can be evenly and synchronously unfolded.

[0026] When all the support plates 4 have completely returned to the unfolded state, turn off the motor 11. At this time, the landing gear device is ready and can stably support the drone for landing or ground operations. During the landing process of the drone, when the support plate 4 touches the ground, it will naturally rotate outwards due to the impact force from the ground. At this time, the scroll spring 5 will play an important role, significantly absorbing and reducing this impact force by deforming, providing a smooth buffering effect for the landing process of the drone, and thus effectively protecting the drone from damage caused by direct impact.

[0027] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those skilled in the art.

Claims

1. A drone landing gear device, comprising a connecting plate (1), a fixing block (2), a connecting shaft (3) and a supporting plate (4), wherein the connecting plate (1) is provided with four fixing blocks (2), and the fixing blocks (2) are all provided with supporting plates (4) rotatably via the connecting shaft (3), characterized in that: It also includes a volute spring (5), and a volute spring (5) for absorbing impact force is provided at the rotation connection between the support plate (4) and the adjacent connecting shaft (3).

2. A UAV landing gear device according to claim 1, characterized in that: The invention also comprises a first winding ring (7), a second winding ring (8) and a pull rope (10); the first winding ring (7) is rotatably provided at the bottom of the connecting plate (1); the second winding ring (8) is rotatably provided on the first winding ring (7); two protrusions are designed on the outer sides of the first winding ring (7) and the second winding ring (8); and the four protrusions are evenly spaced and distributed; the pull rope (10) is connected between the protrusions on the adjacent first winding ring (7) of the two supporting plates (4); and the pull rope (10) is connected between the protrusions on the adjacent second winding ring (8) of the other two supporting plates (4).

3. A UAV landing gear device according to claim 2, characterized in that: It also includes a motor (11), which is installed at the top center of the connecting plate (1), and the output shaft of the motor (11) passes through the middle of the connecting plate (1) and is connected to the first winding ring (7).

4. A UAV landing gear device according to claim 3, characterized in that: It also includes a reinforcement block (12), which is arranged at the lower part of the support plate (4).

5. A UAV landing gear device according to claim 4, characterized in that: It also comprises a limiting block (6), and the limiting block (6) is connected to a side of the support plate (4) close to the fixing block (2).

6. A UAV landing gear device according to claim 5, characterized in that: It also includes a limiting ring (9), the bottom of each fixing block (2) is provided with a limiting ring (9), and the pull rope (10) passes through the limiting ring (9).

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