Aerial survey unmanned aerial vehicle spiral blade protection mechanism

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, in particular to an aerial survey unmanned aerial vehicle spiral blade protection mechanism which comprises an unmanned aerial vehicle body. The protection device is installed in the unmanned aerial vehicle body, and the two ends of the protection device penetrate to the exterior of the unmanned aerial vehicle body; the protection device comprises a servo motor, an output shaft of the servo motor is fixedly connected with a worm, the surface of the worm is in meshed connection with two worm wheels which are rotationally connected with the unmanned aerial vehicle body, and one end of each worm wheel is fixedly connected with a protection frame; the protection device has the dual effects of protecting the spiral blades of the unmanned aerial vehicle and protecting the structure from rising and falling, so that the bearing load of the existing unmanned aerial vehicle can be reduced, the endurance of the unmanned aerial vehicle is prolonged, meanwhile, the condition that the shooting of the unmanned aerial vehicle video recording device is shielded can be avoided, and the shooting effect of the unmanned aerial vehicle video recording device is improved.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a protective mechanism for the propeller blades of an aerial surveying UAV. Background Technology

[0002] Aerial survey drones are devices used for monitoring and management. They are characterized by their mobility, efficiency, speed, precision, low operating costs, wide applicability, and short operating time. They have significant advantages in rapidly acquiring high-resolution images of small areas and regions with difficult flight conditions. Currently, while existing aerial survey drones can land smoothly on flat ground, they cannot land properly in mountainous terrain, resulting in some damage to the fuselage during landing. Collisions can also cause significant damage to the fuselage. Because operations take place in mountainous areas, unpredictable events can occur. To reduce the damage to the drone itself caused by such events, [further measures are needed].

[0003] Currently, a Chinese patent discloses a mountain surveying and mapping drone (publication number CN219056610U). When in use, this mountain surveying and mapping drone improves the landing cushioning of the drone during operation in mountainous areas by using a reinforcing rod, thereby improving the stability of the drone during takeoff and landing in mountainous terrain and increasing the drone's work efficiency. When in use, the drone can adjust the shooting angle of the camera device through the fixed rod and telescopic rod in the camera device, thereby improving the completion effect of the surveying and mapping work and increasing work efficiency.

[0004] Because the propeller blade protection structure and the landing protection structure of the above-mentioned device are set up separately, this not only increases the load on the aerial survey drone and reduces the drone's endurance, but also the landing protection structure is always located at the bottom of the aerial survey drone, which will block part of the camera's field of view and affect the camera's normal shooting.

[0005] Therefore, a protective mechanism for the propeller blades of aerial surveying UAVs is proposed to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a propeller blade protection mechanism for aerial surveying UAVs in order to solve the above-mentioned problems, thereby improving the problem of the existing propeller blade protection mechanisms for aerial surveying UAVs having limited functionality and insufficient practicality.

[0007] This utility model achieves the above-mentioned objective through the following technical solution: a propeller blade protection mechanism for an aerial surveying UAV, comprising: a UAV body; a protection device, wherein the protection device is installed inside the UAV body, and both ends of the protection device extend to the outside of the UAV body.

[0008] Preferably, the protective device includes a servo motor, the output shaft of which is fixedly connected to a worm gear. Two worm wheels, each rotatably connected to the drone body, are meshed with the surface of the worm gear. One end of each worm wheel is fixedly connected to a protective frame, and the other end of the protective frame passes through the drone body and is fixedly connected to the other end of the worm wheel. The end of the drone body is located inside the protective frame. The design of the worm wheel and worm gear allows the worm gear to lock the protective frame when it is not rotating, eliminating the need for an additional positioning structure. This simplifies the overall structure of the protective device and reduces its weight. This protective device provides dual protection for the drone's propeller blades and landing protection, reducing the load on existing drones and extending their flight time. It also prevents obstruction of the drone's camera, improving its recording quality.

[0009] Preferably, the two worm gears are symmetrically distributed on both sides of the worm, and the worm gears are located below the servo motor. This ensures that the worm simultaneously drives the two worm gears to rotate in opposite directions, so as to ensure that the two protective frames can rotate in mirror image.

[0010] Preferably, the protective frame has rounded corners, and the protective frame is made of carbon fiber material. This ensures the overall strength of the protective frame while reducing its weight. Furthermore, the rounded corner design reduces the risk of the protective frame injuring people in the surrounding area, thus achieving a good protective effect.

[0011] Preferably, the protective frame is covered with a protective sleeve, which is located on the outside of the UAV body. The protective sleeve is made of fluororubber material, which can not only reduce the impact force generated when the protective frame collides, but also reduce the vibration generated when the UAV body lands on the ground, thereby playing a shock absorption and buffering role.

[0012] Preferably, the surface of the protective cover is provided with a reflective film, which is a glass microsphere material component. This makes the drone body more conspicuous, so that people around can locate the drone body in a bright light environment.

[0013] Preferably, the surface of the protective frame is fixedly connected with two positioning rings, which are rotatably connected to the inside of the UAV body. This can limit the position of the protective frame and reduce the probability of the protective frame becoming loose.

[0014] Preferably, a limiting cavity is formed inside the drone body. The limiting cavity has a fan-shaped cross-section. One end of one of the protective frames extends to the outside of the limiting cavity. A limiting block is fixedly connected to the surface of one of the protective frames and disposed inside the limiting cavity. One end of the limiting block contacts the limiting cavity. This can limit the rotation angle of the protective frame and prevent the protective frame from rotating excessively, so that the protective frame can perform drone propeller protection operations or drone landing protection operations at the optimal angle.

[0015] Preferably, trigger switches are embedded in both of the two opposing inner walls of the limiting cavity. One of the trigger switches is in contact with the limiting block at this time. This can stop the servo motor in time after the protective frame rotates to the limit angle, avoid the servo motor from running continuously, and reduce the probability of damage due to increased running resistance of the servo motor.

[0016] The beneficial effects of this utility model are:

[0017] 1. This protective device has the dual effect of protecting the drone's propeller blades and landing protection structure. This not only reduces the load on the existing drone, thereby extending the drone's endurance, but also avoids the drone's camera being blocked, thus improving the shooting effect of the drone's camera.

[0018] 2. The design of worm gear and worm is adopted. Since the worm has a locking function for the worm wheel, when the worm is not rotating, the worm can lock the protective frame through the worm wheel, so that the protective frame is kept at the corresponding angle. There is no need to set up an additional positioning structure for the protective frame, thus simplifying the overall structure of the protective device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the protective device in this utility model when it is flattened.

[0020] Figure 2 This is a schematic diagram showing the resetting of the protective device in this utility model;

[0021] Figure 3 This is a schematic diagram of the protective device in this utility model;

[0022] Figure 4 This is a schematic diagram of the connection between the worm gear and the worm in this utility model;

[0023] Figure 5 This is a partial structural diagram of the present invention.

[0024] In the diagram: 1. UAV body; 11. Limiting cavity; 2. Protective device; 21. Servo motor; 22. Worm gear; 23. Worm wheel; 24. Protective frame; 25. Protective sleeve; 26. Positioning ring; 27. Limiting block; 28. Trigger switch. Detailed Implementation

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

[0026] In practical implementation: such as Figure 1-5 As shown, a propeller blade protection mechanism for an aerial surveying UAV includes: a UAV body 1; and a protection device 2, which is installed inside the UAV body 1 and extends to the outside of the UAV body 1 at both ends (the UAV to which this application applies needs to be a model with a compilable control system and a camera device located at the bottom of the UAV).

[0027] like Figure 3 , Figure 4 and Figure 5 As shown, the protective device 2 includes a servo motor 21, the output shaft of which is fixedly connected to a worm gear 22. Two worm wheels 23, each rotatably connected to the drone body 1, are meshed with the surface of the worm gear 22. One end of each worm wheel 23 is fixedly connected to a protective frame 24, and the other end of the protective frame 24 passes through the drone body 1 and is fixedly connected to the other end of the worm wheel 23. The end of the drone body 1 is located inside the protective frame 24. The two worm wheels 23 are symmetrically distributed on both sides of the worm gear 22 and are located below the servo motor 21. The edges of the protective frame 24 are rounded, and the protective frame 24 is made of carbon fiber. A protective sleeve 25 is fitted over the surface of the protective frame 24, and the protective sleeve 25 is located outside the drone body 1. The protective sleeve 25 is made of fluororubber. A reflective film, made of glass microspheres, is provided on the surface of the protective sleeve 25. Two positioning rings 26 are fixedly connected to the surface of the protective frame 24 and are rotatably connected to the inside of the drone body 1.

[0028] like Figure 3 and Figure 5As shown, a limiting cavity 11 is formed inside the UAV body 1. The limiting cavity 11 has a fan-shaped cross-section. One end of a protective frame 24 extends through to the outside of the limiting cavity 11. A limiting block 27 is fixedly connected to the surface of one of the protective frames 24 and is disposed inside the limiting cavity 11. One end of the limiting block 27 contacts the limiting cavity 11. Trigger switches 28 are embedded in the two opposite inner walls of the limiting cavity 11. One of the trigger switches 28 is in contact with the limiting block 27 at this time. (The control system in the UAV body 1 is electrically connected to the servo motor 21. The servo motor 21 is electrically connected to the trigger switch 28. During the rotation of the protective frame 24, the protective frame 24 synchronously drives the limiting block 27 to rotate in the limiting cavity 11. When the protective frame 24 is flattened or reset to the initial position, the limiting block 27 just contacts the inner wall of the limiting cavity 11 and the adjacent trigger switch 28. At this time, the trigger switch 28 controls the servo motor 21 to shut down according to the preset command, so that the protective frame 24 stops rotating.)

[0029] When this utility model is in use, after the drone body 1 takes off, the operator can control the servo motor 21 to rotate in the corresponding direction through the control system of the drone body 1. The servo motor 21 drives the worm 22 to rotate, and the worm 22 simultaneously drives the two worm wheels 23 to rotate. Since the two worm wheels 23 are located on both sides of the worm 22, the rotation directions of the two worm wheels 23 are opposite. The two worm wheels 23 drive the two protective frames 24 to rotate upwards in opposite directions until the two protective frames 24 are flattened at the same time. At this time, the protective frames 24 can just cover the spiral blade in the drone body 1. Even if the drone body 1 collides with the surrounding objects, the protective frames 24 can make contact with the objects in advance, which reduces the probability of the spiral blade of the drone body 1 being hit, thereby protecting the integrity of the spiral blade of the drone body 1. At this time, both protective frames 24 are above the camera device located at the bottom of the drone body 1, and the camera device can carry out shooting work in an unobstructed environment.

[0030] Before the drone body 1 lands, the staff can control the servo motor 21 to rotate in the opposite direction through the control system of the drone body 1. The servo motor 21 drives the worm gear 22 to rotate in the opposite direction. The worm gear 22 simultaneously drives the two worm wheels 23 to rotate in the opposite direction. The two worm wheels 23 respectively drive the two protective frames 24 to rotate downwards towards each other until the two protective frames 24 return to their original positions. At this time, the lowest point of the two protective frames 24 is together below the drone body 1. During the subsequent landing process, the protective frames 24 can make contact with the ground in advance, so that the drone body 1 can land stably.

[0031] In summary, the protective device 2 has the dual effect of protecting the drone's propeller blades and its take-off and landing protection structure. This not only reduces the load on the existing drone and thus extends its flight time, but also prevents the drone's camera from being blocked, thereby improving the shooting effect of the drone's camera.

[0032] It should be noted that the UAV body 1, servo motor 21 and trigger switch 28 mentioned above are all devices with relatively mature existing technology. The specific models can be selected according to actual needs. At the same time, the power supply of the UAV body 1, servo motor 21 and trigger switch 28 can be powered by the built-in power supply or by the mains power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A protective mechanism for the propeller blades of an aerial surveying unmanned aerial vehicle (UAV), characterized in that, include: Unmanned aerial vehicle (UAV) body (1); Protective device (2), the protective device (2) is installed inside the UAV body (1), and both ends of the protective device (2) extend to the outside of the UAV body (1); The protective device (2) includes a servo motor (21), the output shaft of which is fixedly connected to a worm (22). The surface of the worm (22) is meshed with two worm wheels (23), both of which are rotatably connected to the UAV body (1). One end of the worm wheel (23) is fixedly connected to a protective frame (24), and the other end of the protective frame (24) passes through the UAV body (1) and is fixedly connected to the other end of the worm wheel (23). The end of the UAV body (1) is located inside the protective frame (24).

2. The propeller blade protection mechanism for an aerial survey UAV according to claim 1, characterized in that: The two worm gears (23) are symmetrically distributed on both sides of the worm (22), and the worm gears (23) are located below the servo motor (21).

3. The propeller blade protection mechanism for an aerial survey UAV according to claim 1, characterized in that: The protective frame (24) has rounded corners and is made of carbon fiber material.

4. The propeller blade protection mechanism for an aerial survey UAV according to claim 1, characterized in that: The protective frame (24) is covered with a protective sleeve (25), which is located on the outside of the UAV body (1). The protective sleeve (25) is a fluororubber material component.

5. The propeller blade protection mechanism for an aerial survey UAV according to claim 4, characterized in that: The surface of the protective sleeve (25) is provided with a reflective film, which is a glass microsphere material component.

6. The propeller blade protection mechanism for an aerial survey UAV according to claim 1, characterized in that: The protective frame (24) has two positioning rings (26) fixedly connected to its surface, and the positioning rings (26) are rotatably connected to the inside of the UAV body (1).

7. The propeller blade protection mechanism for an aerial survey UAV according to claim 1, characterized in that: The UAV body (1) has a limiting cavity (11) inside. The limiting cavity (11) has a fan-shaped cross-section. One end of one of the protective frames (24) extends to the outside of the limiting cavity (11). A limiting block (27) is fixedly connected to the surface of one of the protective frames (24) and is disposed inside the limiting cavity (11). One end of the limiting block (27) is in contact with the limiting cavity (11).

8. The propeller blade protection mechanism for an aerial survey UAV according to claim 7, characterized in that: Both of the two opposing inner walls of the limiting cavity (11) are fitted with trigger switches (28), one of which is in contact with the limiting block (27) at this time.

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