Take-off and landing buffer protection device for unmanned aerial vehicle

Abstract

The invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle takeoff and landing buffer protection device. Comprising a mounting frame, a fixed seat, a swing rod, a first clockwork spring, a first rotating rod, a supporting piece and a second clockwork spring, fixing seats are arranged on the four sides of the mounting frame, swing rods are rotationally arranged on the fixing seats, first clockwork springs are connected between the fixing seats and the swing rods, first rotating rods are rotationally arranged at the bottoms of the swing rods, supporting pieces are fixed to the two ends of each first rotating rod, and second clockwork springs are connected between the swing rods and the first rotating rods. Landing impact energy is absorbed and dispersed through cooperative deformation of the multiple stages of clockwork springs (the first clockwork spring, the second clockwork spring, the third clockwork spring and the fourth clockwork spring), when the supporting piece makes contact with the ground, impact force sequentially drives the swing rod, the first rotating rod, the rotating frame, the second rotating rod and other components to rotate, and all the stages of springs are forced to deform; and the impact force peak value transmitted to the unmanned aerial vehicle main body structure is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of unmanned aerial vehicles, and particularly relates to a landing buffer protection device for unmanned aerial vehicles. BACKGROUND

[0002] An unmanned aerial vehicle is a kind of aircraft that can fly without direct human control, relying on its own program control or remote instructions. It integrates advanced flight control technology, sensor technology, communication technology and other multi-field achievements, and has the advantages of flexibility, low cost and adaptability to complex and dangerous environments. Today, unmanned aerial vehicles are widely used in many fields such as aerial surveying and mapping, agricultural plant protection, logistics distribution, emergency rescue and environmental monitoring, greatly changing people's work and life style and becoming an important tool for promoting innovation and development in various industries.

[0003] During the landing process of the unmanned aerial vehicle, the main body of the unmanned aerial vehicle will bear a huge impact force from the ground. If there is no effective buffer protection measure, these impact forces will directly act on the fuselage structure, internal electronic components and precision equipment of the unmanned aerial vehicle, which can easily cause damage to the fuselage, failure of electronic components, and thus affect the service life and task execution effect of the unmanned aerial vehicle, and even cause serious damage that cannot be repaired, increase the use cost and safety risk. The existing unmanned aerial vehicle landing buffer device generally relies on simple elastic materials or single spring structure to absorb impact energy. When facing a larger impact force, the buffering effect is limited and it is difficult to effectively protect the main body of the unmanned aerial vehicle. SUMMARY

[0004] In order to overcome the shortcomings of the existing unmanned aerial vehicle landing buffer device which generally relies on simple elastic materials or single spring structure to absorb impact energy, the present application provides a landing buffer protection device for unmanned aerial vehicles.

[0005] The technical solution of the present application is: a landing buffer protection device for unmanned aerial vehicles, comprising a mounting frame, a fixed seat, a swing rod, a first clock spring, a first rotating rod, a support and a second clock spring, the mounting frame is provided with a fixed seat on each side, the fixed seat is rotatably provided with a swing rod, the fixed seat and the swing rod are connected by a first clock spring, the rotating connection part of the fixed seat and the swing rod is provided with a damping, the bottom of the swing rod is rotatably provided with a first rotating rod, the first rotating rod is fixed with a support at both ends, the swing rod and the first rotating rod are connected by a second clock spring, and the rotating connection part of the swing rod and the first rotating rod is provided with a damping.

[0006] In one of the embodiments, a rotating frame, a third clockwork spring, a second rotating rod and a fourth clockwork spring are further included, the rotating frame is rotatably arranged on the swing rod, the third clockwork spring is connected between the swing rod and the rotating frame, a damping is arranged at the rotating connection between the swing rod and the rotating frame, the second rotating rod is rotatably arranged on the rotating frame, the fourth clockwork spring is connected between the rotating frame and the second rotating rod, a damping is arranged at the rotating connection between the rotating frame and the second rotating rod, and the second rotating rod is fixedly provided with a support at both ends.

[0007] In one of the embodiments, the swing rod comprises a swing sleeve, an extension rod, an adjusting bolt and a nut, the swing sleeve is rotatably arranged on the fixed seat, the extension rod is slidably arranged on the swing sleeve, a locking hole is formed in the swing sleeve, a plurality of adjusting holes are formed in the extension rod, the adjusting bolt is slidably arranged in the locking hole, the nut is matched with the adjusting bolt, and the adjusting bolt passes through one of the adjusting holes.

[0008] In one of the embodiments, a first limiting plate and a second limiting plate for limiting the rotating angle of the swing rod are further included, and the first limiting plate and the second limiting plate are arranged on the fixed seat.

[0009] In one of the embodiments, the support comprises a support block and a rubber pad, a plurality of grooves are arranged at the bottom of the support block, and the rubber pad is arranged on the support block.

[0010] In one of the embodiments, the support block is combined by a cube and a semi-cylinder, the grooves are arranged at the semi-cylinder, and the rubber pad is arranged at the cube.

[0011] In one of the embodiments, a fixing bolt is further included, and the mounting frame is fixed on the unmanned aerial vehicle body through the fixing bolt.

[0012] In one of the embodiments, when the unmanned aerial vehicle body is not landed, the first clockwork spring is in a deformed state, at this time, the swing rod is in contact with and extruded by the first limiting plate.

[0013] Compared with the prior art, the present application has the following advantages: 1. The present application absorbs and disperses the landing impact energy through the cooperative deformation of the multiple clockwork springs (first, second, third and fourth clockwork springs), when the support contacts the ground, the impact force drives the swing rod, the first rotating rod, the rotating frame, the second rotating rod and other components to rotate relatively, forcing the springs at all levels to deform, effectively reducing the impact force peak transmitted to the unmanned aerial vehicle body structure, and protecting the fuselage, internal electronic components and precision equipment from damage.

[0014] 2. The present application increases the number of support points by additionally arranging the rotating frame, the third clockwork spring, the second rotating rod and the fourth clockwork spring, so that the device can better adapt to uneven, inclined or soft landing surfaces, and improve the safe landing ability of the unmanned aerial vehicle in non-ideal sites.

[0015] 3、The present application adopts telescopic design (swivel sleeve + telescopic rod) through the swivel rod, and the user can adjust the length of the swivel rod according to the actual task requirement by locking the adjusting bolt and the nut on the adjusting hole in different positions, so as to adapt to different landing environments and requirements.

[0016] 4、The present application mechanically limits the rotation angle of the swivel rod through the first limiting plate and the second limiting plate, prevents the rotation angle from being too large, avoids the damage of the first clock spring due to excessive deformation, prevents the collision and interference of the device components, and ensures the reliability and safety of the mechanism movement.

[0017] 5、When the unmanned aerial vehicle body lands, the semicylindrical part of the support block first contacts the ground and rotates under force, so that the second or fourth clock spring deforms to absorb impact energy, and the cubic part increases the friction force with the ground to prevent slipping; the groove promotes the initial rotation of the support block to enhance the buffering effect, and the rubber pad increases the friction force between the cubic part and the ground to improve the stability. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of the present application.

[0019] Figure 2 is a schematic diagram of the three-dimensional structure of the mounting bracket, swivel rod and first rotating rod of the present application.

[0020] Figure 3 is a schematic diagram of the three-dimensional structure of the mounting bracket, fixed bolt and swivel rod of the present application.

[0021] Figure 4 is an exploded view of the mounting bracket, swivel rod and first rotating rod of the present application.

[0022] Figure 5 is a schematic diagram of the three-dimensional structure of the first rotating rod, support and second clock spring of the present application.

[0023] Figure 6 is a schematic diagram of the three-dimensional structure of the swivel sleeve, telescopic rod and adjusting bolt of the present application.

[0024] Figure 7 is an exploded view of the swivel sleeve, telescopic rod and adjusting bolt of the present application.

[0025] Figure 8 is a schematic diagram of the three-dimensional structure of the mounting bracket, fixed bolt and fixed seat of the present application.

[0026] Figure 9 is a schematic diagram of the three-dimensional structure of the support block, groove and rubber pad of the present application.

[0027] The meanings of the reference numerals in the diagram are as follows: 1. UAV body; 2. Mounting frame; 3. Fixing bolt; 4. Fixing base; 401. First limiting plate; 402. Second limiting plate; 5. Swing rod; 501. Swing sleeve; 502. Telescopic rod; 503. Adjusting bolt; 504. Nut; 505. Locking hole; 506. Adjusting hole; 6. First spring; 7. First rotating rod; 8. Support component; 801. Support block; 802. Groove; 803. Rubber pad; 9. Second spring; 10. Rotating frame; 11. Third spring; 12. Second rotating rod; 13. Fourth spring. Detailed Implementation

[0028] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are shown.

[0029] A drone takeoff and landing buffer protection device, such as Figures 1-5 As shown, the device includes a mounting frame 2, a fixed base 4, a swing rod 5, a first spring 6, a first rotating rod 7, a support member 8, and a second spring 9. The mounting frame 2 is installed at the bottom of the UAV body 1. Fixed bases 4 are provided on all four sides of the mounting frame 2. The fixed bases 4 are connected to the swing rod 5 through bearings or hinge structures, so that the swing rod 5 can rotate around the rotation point of the fixed base 4. Two first springs 6 are connected between the fixed base 4 and the swing rod 5. Damping is provided at the rotation connection between the fixed base 4 and the swing rod 5. The first springs 6 generate elastic deformation when the swing rod 5 rotates. A first rotating rod 7 is rotatably provided at the bottom of the swing rod 5. Support members 8 are fixed at both ends of the first rotating rod 7. The support members 8 are in direct contact with the ground. Two second springs 9 are connected between the swing rod 5 and the first rotating rod 7. Damping is provided at the rotation connection between the swing rod 5 and the first rotating rod 7.

[0030] When the drone body 1 lands, the bottom support 8 is the first to contact the ground or other landing surface. Due to the weight of the drone body 1 and the momentum it has during descent, a significant impact force is generated. This impact force, after acting on the support 8, is quickly transmitted to the swing arm 5 through the first rotating rod 7. The first rotating rod 7 rotates relative to its rotation point at the bottom of the swing arm 5, simultaneously driving the swing arm 5 to rotate around its rotation fulcrum on the fixed base 4. During the rotation of the swing arm 5 and the first rotating rod 7, the first spring 6 and the second spring 9 are deformed by external forces. Through their own elastic deformation, the first spring 6 and the second spring 9 convert the impact energy concentrated on the drone body 1 into their own elastic potential energy and store it, attenuating the peak impact force transmitted to the drone body 1. This effectively protects the internal precision structure and external components of the drone body 1, preventing damage caused by a hard landing.

[0031] likeFigures 3-4 As shown, the device further comprises a rotating frame 10, a third clockwork spring 11, a second rotating rod 12 and a fourth clockwork spring 13, the rotating frame 10 is rotatably arranged on the swing rod 5, the third clockwork spring 11 is connected between the swing rod 5 and the rotating frame 10, a damping is arranged at the rotating connection between the swing rod 5 and the rotating frame 10, the second rotating rod 12 is rotatably arranged on the rotating frame 10, the fourth clockwork spring 13 is connected between the rotating frame 10 and the second rotating rod 12, a damping is arranged at the rotating connection between the rotating frame 10 and the second rotating rod 12, and the support 8 is fixedly arranged at both ends of the second rotating rod 12. By adding the rotating frame 10, the third clockwork spring 11, the second rotating rod 12 and the fourth clockwork spring 13, the number of supports 8 is increased, more support points are provided when the unmanned aerial vehicle main body 1 lands, and the adaptability of the device to complex and uneven landing surfaces is enhanced. For example, when landing on uneven ground, multiple supports 8 can simultaneously contact the ground, disperse pressure and reduce the risk of single-point overload; the third clockwork spring 11 and the fourth clockwork spring 13 are deformed, further enhancing the buffering capacity.

[0032] As shown in Figures 6-7 The swing rod 5 comprises a swing sleeve 501, an extension rod 502, an adjusting bolt 503 and a nut 504. The swing sleeve 501 is rotatably arranged on the fixed seat 4. The extension rod 502 is slidably arranged in the swing sleeve 501, allowing the extension rod 502 to freely slide along the axis of the swing sleeve 501. A locking hole 505 is formed in the swing sleeve 501. A plurality of adjusting holes 506 are formed at equal intervals along the length of the extension rod 502. The adjusting bolt 503 is slidably arranged in the locking hole 505. The nut 504 is fitted on the adjusting bolt 503. The adjusting bolt 503 passes through one of the adjusting holes 506. By selecting different adjusting holes 506 on the extension rod 502, the length of the swing rod 5 can be adjusted within a predetermined range. The locking hole 505 and the adjusting hole 506 cooperate with the adjusting bolt 503 and the nut 504 to provide a firm and reliable mechanical lock, ensuring that the length of the swing rod 5 remains stable during flight and landing. This adjustability greatly improves the versatility and adaptability of the device to different task scenarios.

[0033] As shown in Figure 4 and Figure 8As shown, the first limiting plate 401 and the second limiting plate 402 are also included for limiting the rotation angle of the swing rod 5, and the first limiting plate 401 and the second limiting plate 402 are arranged on the fixed seat 4. The core role of the first limiting plate 401 and the second limiting plate 402 is to strictly mechanically limit the angle range of the swing rod 5 rotating around the fixed seat 4. When the unmanned aerial vehicle lands, the swing rod 5 rotates upward due to the impact force, and its movement track will be blocked by the second limiting plate 402; while in the resetting process after the buffering ends, or in other cases of downward swing, it will be blocked by the first limiting plate 401. This hard block effectively controls the rotation angle of the swing rod 5 within a safe preset range, protects the first clockwork spring 6, prevents it from exceeding the elastic limit due to excessive angle and causing plastic deformation or even breaking, prevents the swing rod 5 from rigidly colliding with the fixed seat 4, the mounting frame 2 or other adjacent components, avoids structural damage, ensures the reliability and predictability of the entire mechanism movement, and improves the durability and operation safety of the device in repeated use.

[0034] As shown in Figure 5 and Figure 9 , the support 8 includes a support block 801 and a rubber pad 803, the bottom of the support block 801 is provided with a plurality of grooves 802, and the support block 801 is provided with the rubber pad 803. The grooves 802 and the rubber pad 803 are used to increase the friction between the support block 801 and the ground or other landing plane, the grooves 802 at the bottom of the support block 801 promote and guide the expected rotation (rather than slipping) of the support block 801 at the moment of landing, thereby ensuring that the second clockwork spring 9 or the fourth clockwork spring 13 can effectively start and absorb impact energy; when the support block 801 rotates by a certain angle, the rubber pad 803 becomes the main contact medium with the ground. It greatly increases the static friction and sliding friction between the cubic part and the ground, providing excellent anti-slip stability.

[0035] The support block 801 is composed of a cube and a semi-cylinder, the main body is a geometric cube, but a semi-cylinder is fused and connected at the bottom, the grooves 802 are located at the semi-cylinder, and the rubber pad 803 is located at the cube. When the unmanned aerial vehicle body 1 lands, the semi-cylinder part of the support block 801 first contacts the ground or other landing plane, the support block 801 rotates under force, at this time the second clockwork spring 9 or the fourth clockwork spring 13 deforms, absorbs and disperses impact energy, until the cubic part of the support block 801 contacts the ground or other landing plane, one side of the cubic part is attached to the ground or other landing plane, forming a stable surface contact, and the large flat bottom surface significantly increases the contact area and static friction between the support block 801 and the ground. This enhanced friction is crucial for preventing the unmanned aerial vehicle body 1 from slipping, rolling over or drifting with the wind after landing, ensuring a stable attitude after landing.

[0036] AsFigure 3 and Figure 8 As shown in FIG. 1, the mounting frame 2 is fixed on the unmanned aerial vehicle body 1 by the fixing bolt 3, which provides a stable and reliable mechanical connection, can withstand the vibration in flight, the maneuvering load and the huge impact force when landing, and ensures that the entire buffer device will not be separated from the main body. Secondly, the bolt connection method has the characteristics of standardization, making the installation, disassembly and maintenance of the device very convenient, and facilitating the user to replace.

[0037] When the unmanned aerial vehicle body 1 is not landed, the first clock spring 6 is in a deformed state, at which time the swing rod 5 is in contact with and extruded by the first limiting plate 401. By pre-setting the deformed state of the first clock spring 6, the swing rod 5 is in close contact with and extruded by the first limiting plate 401 during flight, forming a mechanical locking effect, inhibiting the accidental swing of the swing rod 5 due to airflow disturbance, vibration or acceleration change in the flight process, ensuring the stability of the structure of the device in the flight state, and avoiding unnecessary energy consumption or unnecessary friction loss between components.

Claims

1. A takeoff and landing buffer protection device for unmanned aerial vehicles (UAVs), comprising a mounting bracket (2), characterized in that, It also includes a fixed seat (4), a swing rod (5), a first spring (6), a first rotating rod (7), a support (8), and a second spring (9). The mounting bracket (2) is provided with fixed seats (4) on all four sides. A swing rod (5) is rotatably provided on the fixed seat (4). A first spring (6) is connected between the fixed seat (4) and the swing rod (5). Damping is provided at the rotatable connection between the fixed seat (4) and the swing rod (5). A first rotating rod (7) is rotatably provided at the bottom of the swing rod (5). Supports (8) are fixed at both ends of the first rotating rod (7). A second spring (9) is connected between the swing rod (5) and the first rotating rod (7). Damping is provided at the rotatable connection between the swing rod (5) and the first rotating rod (7).

2. The unmanned aerial vehicle (UAV) takeoff and landing buffer protection device as described in claim 1, characterized in that, It also includes a rotating frame (10), a third spring (11), a second rotating rod (12) and a fourth spring (13). The rotating frame (10) is rotatably mounted on the swing rod (5). The third spring (11) is connected between the swing rod (5) and the rotating frame (10). Damping is provided at the rotatable connection between the swing rod (5) and the rotating frame (10). The second rotating rod (12) is rotatably mounted on the rotating frame (10). The fourth spring (13) is connected between the rotating frame (10) and the second rotating rod (12). Damping is provided at the rotatable connection between the rotating frame (10) and the second rotating rod (12). Support members (8) are fixed at both ends of the second rotating rod (12).

3. The unmanned aerial vehicle (UAV) takeoff and landing buffer protection device as described in claim 1, characterized in that, The swing arm (5) includes a swing sleeve (501), a telescopic rod (502), an adjusting bolt (503), and a nut (504). The fixed base (4) is provided with a rotatable swing sleeve (501), and the swing sleeve (501) is provided with a sliding telescopic rod (502). The swing sleeve (501) has a locking hole (505), and the telescopic rod (502) has multiple adjusting holes (506). The adjusting bolt (503) is provided with a sliding adjustment bolt (503) in the locking hole (505). The adjusting bolt (503) is fitted with a nut (504), and the adjusting bolt (503) passes through one of the adjusting holes (506).

4. The unmanned aerial vehicle (UAV) takeoff and landing buffer protection device as described in claim 1, characterized in that, It also includes a first limiting plate (401) and a second limiting plate (402) for limiting the rotation angle of the swing arm (5), and the first limiting plate (401) and the second limiting plate (402) are provided on the fixed base (4).

5. The unmanned aerial vehicle (UAV) takeoff and landing buffer protection device as described in claim 1, characterized in that, The support member (8) includes a support block (801) and a rubber pad (803). The bottom of the support block (801) is provided with multiple grooves (802), and the support block (801) is provided with a rubber pad (803).

6. The unmanned aerial vehicle (UAV) takeoff and landing buffer protection device as described in claim 5, characterized in that, The support block (801) is composed of a cube and a semi-cylinder, with a groove (802) located at the semi-cylinder and a rubber pad (803) located at the cube.

7. The unmanned aerial vehicle (UAV) takeoff and landing buffer protection device as described in claim 1, characterized in that, It also includes fixing bolts (3), and the mounting bracket (2) is fixed to the main body of the drone (1) by fixing bolts (3).

8. The unmanned aerial vehicle (UAV) takeoff and landing buffer protection device as described in claim 4, characterized in that, When the main body of the drone (1) has not landed, the first spring (6) is in a deformed state. At this time, the swing rod (5) contacts and presses against the first limiting plate (401).

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