Anti-collision protection device for unmanned aerial vehicle

Abstract

The present invention relates to the field of unmanned aerial vehicles, and in particular to an anti-collision protection device for unmanned aerial vehicles, which solves the problem that the existing devices are inconvenient to protect the blades from the vertical direction. The present invention comprises a main frame, a plurality of sub-frames are arranged on the main frame, an anti-collision protection mechanism is arranged on the sub-frame, the anti-collision protection mechanism comprises a plurality of anti-collision protection parts, the anti-collision protection parts comprise a protection plate relatively rotatably arranged on the sub-frame and an anti-collision part relatively slidably arranged on the sub-frame, the rotation axis A of the protection plate is along the vertical direction, the sliding direction of the anti-collision part is along the radial direction of the sub-frame, and an elastic limiting part for elastically limiting the anti-collision part is arranged, the anti-collision part is connected by transmission to the protection plate, when the anti-collision part moves close to the center of the sub-frame, the protection plate is driven to rotate toward the center of the sub-frame, and a plurality of anti-collision protection parts are connected by transmission, a plurality of anti-collision protection mechanisms are connected by transmission, and a plurality of anti-collision parts and a plurality of protection plates move synchronously; when the unmanned aerial vehicle has a side collision, the present invention can provide comprehensive protection for the blades.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and in particular to an anti-collision protection device for unmanned aerial vehicles. Background Art

[0002] Drone is a general term for unmanned aerial vehicles. Civilian drones are widely used in aerial photography, agriculture, plant protection, express delivery, disaster relief, wildlife observation, infectious disease monitoring, surveying and mapping, news reporting, power inspection, disaster relief, film and television shooting and other fields. Civilian drones mainly include a frame, motor, propeller blades and a main controller. Their working principle is to drive the motor and propeller blades to rotate through the main controller, so that the propeller blades generate downward airflow, thereby generating lift.

[0003] During the flight of a drone, it may be hit for various reasons, which may cause damage to the entire structure. In particular, when the blades are damaged by impact, it will directly affect the normal flight of the drone. Therefore, certain anti-collision protection devices for drones have emerged. At present, the anti-collision protection device for the blades mainly adopts a certain anti-collision ring body set on the side of the blades. Through the anti-collision ring body, it can play an anti-collision role from the side when the drone has a side collision. However, when the drone has a side collision at a high speed, it will also roll over. When the impact surface is a plane, the anti-collision ring can still play an anti-collision protection role, but the drone When used in various complex environments, the impact surface is often not a plane, so that when the UAV hits the side and rolls over, the protruding part of the impact surface can still contact and collide with the blade, causing damage to the blade; there is also a UAV anti-collision protection device that sets a certain protection frame on the entire outer side of the blade, which can simultaneously provide anti-collision protection for the circumference and upper and lower sides of the blade, but will have a certain impact on the airflow generated by the blade. Therefore, this structure is generally far away from the blade, which will make the entire device larger, which to a certain extent limits the flight of the UAV, that is, the existing device is not convenient for protecting the blade in the vertical direction.

[0004] Therefore, the present invention provides an anti-collision protection device for a drone to solve the above problems. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an anti-collision protection device for a drone. The technical problem to be solved is: to provide an anti-collision protection device for a drone that does not affect the flight of the drone in normal times and can fully protect the blades when the drone collides sideways.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: The invention discloses an anti-collision protection device for an unmanned aerial vehicle, comprising a main frame, a plurality of sub-frames being arranged on the main frame, an anti-collision protection mechanism being arranged on the sub-frame, the anti-collision protection mechanism comprising a plurality of anti-collision protection parts, the anti-collision protection parts comprising a protection plate which is relatively rotatably arranged on the sub-frame and an anti-collision part which is relatively slidably arranged on the sub-frame, the rotation axis A of the protection plate is along the vertical direction, the sliding direction of the anti-collision part is along the radial direction of the sub-frame, and an elastic limiting part for elastically limiting the anti-collision part is arranged, the anti-collision part is transmission-connected with the protection plate, when the anti-collision part moves close to the center of the sub-frame, the protection plate is driven to rotate toward the center of the sub-frame, and a plurality of anti-collision protection parts are transmission-connected, a plurality of anti-collision protection mechanisms are transmission-connected, and a plurality of anti-collision parts and a plurality of protection plates move synchronously.

[0007] Preferably, the anti-collision protection mechanism includes an annular rack rotatably set on the sub-frame, a cylindrical gear A meshing with the annular rack is provided on the rotating shaft A, a bevel gear A is also provided on the rotating shaft A, the bevel gear A is meshingly connected with the bevel gear B, the bevel gear B is connected to the ball screw, a support member A is rotatably provided on the ball screw, the support member A is relatively fixedly connected to the sub-frame, the ball screw is provided with a sleeve rod on the external thread sleeve, the anti-collision member is arranged on the sleeve rod, and the elastic limit member includes a rotating plate rotatably set on the side of the ball screw close to the sleeve rod, and a spring is connected to one end of the rotating plate and the sleeve rod.

[0008] Preferably, the sub-frame includes an upper ring body and a lower ring body arranged up and down, and the rotation axis A is arranged between the upper ring body and the lower ring body, and is rotationally connected to the upper ring body and the lower ring body respectively. In a natural state, the protective plate is stored between the upper ring body and the lower ring body.

[0009] Preferably, the annular rack is rotatably arranged on the circumferential side of the lower ring body, and a fixing rod is arranged between the support member A and the upper ring body.

[0010] Preferably, an even number of anti-collision protection mechanisms are provided, and a transmission mechanism is provided between adjacent anti-collision protection mechanisms. The transmission mechanism includes a rotating shaft B arranged between the upper ring body and the lower ring body. The rotating shaft B is rotatably connected to the upper ring body and the lower ring body respectively along the vertical direction. A cylindrical gear B meshing with an annular rack is provided on the rotating shaft B. A bevel gear C is also provided on the rotating shaft B. The bevel gear C is meshingly connected with a bevel gear D. A connecting rod is provided between two adjacent bevel gears D. A support member B is rotatably provided on the connecting rod, and the support member B is connected to the main frame.

[0011] Preferably, it also includes a deceleration and reset mechanism, which includes a hydraulic damper arranged between the main frame and the support member B. The support member B is slidably arranged on the main frame and is threadedly connected to the connecting rod.

[0012] Preferably, the rotating shaft B is provided with an auxiliary plate.

[0013] Preferably, when the protection plate is rotated to a minimum angle, it is located between the upper ring body and the lower ring body, and when it is rotated to a maximum angle, it is along the radial direction of the sub-frame.

[0014] Preferably, the anti-collision member is ring-shaped and made of elastic material.

[0015] The beneficial effects of the present invention are: 1. When the present invention is used in practice, the main frame is used to fix the drone, and the sub-frame is arranged on the peripheral side of the drone blades. When the drone is flying normally, the protective plate is away from the blades, and the blades are not blocked in the vertical direction. When the blades rotate, it can ensure smooth generation of airflow, thereby improving the efficiency of airflow generated by the rotation of the blades. When the drone has a side collision, the corresponding anti-collision parts are squeezed and move close to the center of the sub-frame, and drive all the anti-collision parts to move close to the center of the sub-frame synchronously, and all the protective plates rotate toward the center of the sub-frame synchronously, and the blades are protected in the vertical direction by the protective plates. When the side collision causes the drone to roll over, even if there is a protruding part on the impact surface, the protective plate can effectively prevent the blades from colliding with the protruding part, thereby providing comprehensive anti-collision protection for the blades, and the protective plate can automatically reset, so that after adjusting the drone to fly normally, the drone can resume normal flight.

[0016] 2. The overall structure of the present invention is compact, occupies little space, has little restriction on the flight scene of the UAV, and generates little resistance to the UAV during flight.

[0017] 3. In the natural state, the protection plate of the present invention is stored in the sub-frame, so that the blades are exposed, which is also convenient for cleaning the blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the anti-collision protection mechanism in the present invention; Figure 3 It is a schematic diagram of the specific structure of the anti-collision protection member in the present invention; Figure 4 It is a schematic diagram of the specific structure of the elastic limiting member in the present invention; Figure 5 It is a schematic diagram of the connection of the transmission mechanism on an anti-collision protection mechanism in the present invention; Figure 6 It is a schematic diagram of the specific structure of the transmission mechanism in the present invention; Figure 7 It is a schematic diagram of the specific structure of the deceleration and reset mechanism in the present invention; Figure 8 It is a schematic diagram of the rotation of the annular rack and the connecting rod when the protection plate in the present invention protects the blade.

[0019] Fig. 9 It is a schematic diagram of the structure of the protection plate in the present invention when protecting the blade.

[0020] In the figure: 1. main frame, 2. auxiliary frame, 201. upper ring body, 202. lower ring body, 3. anti-collision protection mechanism, 301. anti-collision member, 302. sleeve rod, 303. ball screw, 304. bevel gear B, 305. rotating shaft A, 306. cylindrical gear A, 307. bevel gear A, 308. ring rack, 309. protection plate, 310. support member A, 311. rotating plate, 312. spring, 313. fixed rod, 4. transmission mechanism, 401. cylindrical gear B, 402. bevel gear C, 403. rotating shaft B, 404. bevel gear D, 405. connecting rod, 406. support member B, 5. deceleration reset mechanism, 501. hydraulic damper. DETAILED DESCRIPTION

[0021] The following will refer to the attached Figures 1 to 9 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0022] An anti-collision protection device for an unmanned aerial vehicle, as shown in the attached Figure 1 , Figure 2 As shown, it includes a main frame 1. In this embodiment, the main frame 1 is in a square frame shape, including four frame rods symmetrically arranged front, back, left and right. A plurality of sub-frames 2 are arranged on the main frame 1. In this embodiment, there are four sub-frames 2, which are arranged at the four corners of the main frame 1, that is, between two adjacent frame rods. An anti-collision protection mechanism 3 is provided on the sub-frame 2.

[0023] During specific use, the device is fixed to the drone through the main frame 1, and each sub-frame 2 is located at each blade of the drone. This embodiment is suitable for a drone with four groups of blades arranged along a square frame, so that each anti-collision protection mechanism 3 can perform anti-collision protection on the corresponding blade. This part of the mechanism is a prior art and will not be described in detail here.

[0024] In addition, it should be noted that, during specific production and manufacturing, the main frame 1 may be further provided with other structures for fixing the main frame 1 to the drone, and the sub-frame 2 and the anti-collision protection mechanism 3 may be provided in different numbers according to different drone models.

[0025] As attached Figure 1 , Figure 2 , Figure 3 , Fig. 9As shown, the anti-collision protection mechanism 3 includes a plurality of anti-collision protection parts. In this embodiment, one anti-collision protection mechanism 3 includes five anti-collision protection parts. The anti-collision protection parts include a protection plate 309 relatively rotatably arranged on the sub-frame 2 and an anti-collision part 301 relatively slidably arranged on the sub-frame 2. The rotation axis A305 of the protection plate 309 is along the vertical direction. One end of the protection plate 309 is rotatably arranged on the sub-frame 2 through the rotation axis A305. The other end can be moved closer to or away from the center of the sub-frame 2 by rotation. The sliding direction of the anti-collision part 301 is along the radial direction of the sub-frame 2. The anti-collision part 301 is close to or away from the center of the sub-frame 2, and an elastic limiting part for elastically limiting the anti-collision part 301 is provided. The anti-collision part 301 is connected to the protection plate 309 by transmission. In the natural state, the anti-collision member 301 is affected by the elastic limiting member and moves away from the center of the sub-frame 2, and the protection plate 309 moves away from the rotation axis A305 and away from the center of the sub-frame 2. When the anti-collision member 301 moves close to the center of the sub-frame 2, it drives the protection plate 309 to rotate toward the center of the sub-frame 2, and multiple anti-collision protection members are transmission-connected, multiple anti-collision protection mechanisms 3 are transmission-connected, multiple anti-collision members 301 and multiple protection plates 309 move synchronously, that is, all anti-collision members 301 move away from the center of the corresponding sub-frame 2 together, and all protection plates 309 move away from the center of the corresponding sub-frame 2 together, all anti-collision members 301 move close to the center of the corresponding sub-frame 2 together, and all protection plates 309 move close to the center of the corresponding sub-frame 2 together.

[0026] Working principle: After the device is fixed to the drone, in a natural state, multiple anti-collision parts 301 are arranged on the side of the blades through the sub-frame 2, and are away from the blades under the action of the elastic limit parts. At the same time, multiple protection plates 309 are away from the blades, so that the blades are not blocked in the vertical direction. When the blades rotate, it can ensure smooth airflow, improve the efficiency of airflow generated by the rotation of the blades, and make the drone fly normally. Through the multiple anti-collision protection parts on the multiple anti-collision protection mechanisms 3, collision protection from all directions can be performed. When one of the anti-collision protection parts in one of the anti-collision protection mechanisms 3 is hit and drives the anti-collision part 301 close to the corresponding blade, it drives all the protection plates 309 to rotate toward the corresponding blade, thereby protecting all the blades. For specific state diagrams, please refer to the attached Fig. 9As shown, when the UAV rolls over due to collision with the impact surface with the protruding part, the protruding part can be avoided from colliding with the blade at the moment of the UAV rollover, so that it can play an anti-collision protection role in various environments and is flexible to use. Afterwards, under the action of the elastic limiter, each anti-collision part 301 and the protection plate 309 are reset. After resetting, the UAV can continue to fly normally. In addition, in the present invention, the protection plate 309 is usually stored in the sub-frame 2. Compared with the structure in which the protection frame is provided on the entire outer side of the blade, the structure of the entire device is relatively compact, occupies less space, and has less restrictions on the flight scene of the UAV. For example, it is easy to enter a small space during disaster relief, and avoid attracting the attention of wild animals due to excessive size when observing wild animals. In addition, due to its small size, the resistance generated during flight is small, which can make the power generated by the blade more efficient.

[0027] As attached Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, in this embodiment, the sub-frame 2 includes an upper ring body 201 and a lower ring body 202 arranged in an upper and lower position, the frame rod of the main frame 1 is used to connect two adjacent upper ring bodies 201, the anti-collision protection mechanism 3 includes an annular rack 308 rotatably arranged on the lower ring body 202, and the rotation axis A305 is arranged between the upper ring body 201 and the lower ring body 202, and is rotatably connected to the upper ring body 201 and the lower ring body 202 respectively, so that the upper ring body 201 and the lower ring body 202 are relatively fixed, and a cylindrical gear A306 meshingly connected to the annular rack 308 is provided on the rotation axis A305, and a bevel gear A307 is also provided on the rotation axis A305, and the bevel gear A307 is meshingly connected There is a bevel gear B304, which is connected to a ball screw 303. A support member A310 is rotatably provided on the ball screw 303. The support member A310 is used to support the ball screw 303 and limit the rotational movement of the ball screw 303. In this embodiment, the support member A310 and the upper ring body 201 are connected by an inverted "L"-shaped fixing rod 313. The ball screw 303 is externally threaded with a sleeve rod 302. The anti-collision member 301 is arranged on the sleeve rod 302. The elastic limit member includes a rotating plate 311 rotatably arranged on the side of the ball screw 303 close to the sleeve rod 302. The rotating plate 311 is connected to one end of the sleeve rod 302 with a spring 312.

[0028] Working principle: Since the ball screw 303 can only rotate, the sleeve rod 302 can automatically position away from the ball screw 303 under the action of the spring 312 and will not rotate. When the anti-collision member 301 is hit and moves close to the blade, the sleeve rod 302 is driven to move close to the blade, and the sleeve rod 302 drives the ball screw 303 to rotate. The ball screw 303 drives the bevel gear B304 to rotate. The bevel gear B304 drives the bevel gear A307 to rotate. The bevel gear A307 drives the rotating shaft A305 to rotate. The rotating shaft A305 drives the cylindrical gear A306 to rotate. The cylindrical gear A306 drives the annular rack 308 to rotate. The annular rack 308 drives the remaining cylindrical gears A306 to rotate, thereby driving the remaining protection plates 309 and the anti-collision member 301 to move, so that each protection plate 309 and the anti-collision member 301 in an anti-collision protection mechanism 3 rotates synchronously.

[0029] In addition, it should be noted that in this embodiment, if each anti-collision member 301 and the protection plate 309 are to move, it is necessary to overcome the elastic force of the spring 312 in each sleeve rod 302. In actual use, the number of springs 312 can be appropriately reduced to reduce the force to be overcome, but it is necessary to add a limit device to limit the sliding movement of the sleeve rod 302. The limit device can be connected to a certain sliding device on the fixed rod 313 to allow the sleeve rod 302 to slide with the sliding device to prevent the sleeve rod 302 from rotating in a natural state.

[0030] In addition, it should be noted that even if the number of springs 312 is not reduced, a limiting device for limiting the sliding movement of the sleeve rod 302 can be added to prevent the sleeve rod 302 from rotating during movement.

[0031] As attached Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 8 As shown, in this embodiment, an even number of anti-collision protection mechanisms 3 are provided, specifically four, and a transmission mechanism 4 is provided between adjacent anti-collision protection mechanisms 3. The transmission mechanism 4 includes a rotating shaft B403 arranged on the adjacent sub-frame 2 and located between the upper ring body 201 and the lower ring body 202. The rotating shaft B403 is rotatably connected to the upper ring body 201 and the lower ring body 202 respectively along the vertical direction. A cylindrical gear B401 meshing with the annular rack 308 is provided on the rotating shaft B403. A bevel gear C402 is also provided on the rotating shaft B403. The bevel gear C402 is meshingly connected with a bevel gear D404. A connecting rod 405 is provided between two adjacent bevel gears D404. A support member B406 is rotatably provided on the connecting rod 405. The support member B406 is connected to the main frame 1. The support member B406 is used to support the connecting rod 405 and limit the rotational movement of the connecting rod 405.

[0032] Working principle: When the annular rack 308 rotates, it drives the cylindrical gear B401 to rotate, the cylindrical gear B401 drives the rotating shaft B403 to rotate, the rotating shaft B403 drives the bevel gear C402 to rotate, the bevel gear C402 drives the bevel gear D404 to rotate, the bevel gear D404 drives the connecting rod 405 to rotate, and the adjacent anti-collision protection mechanism 3 is driven to move through the connecting rod 405, thereby making the four anti-collision protection mechanisms 3 move synchronously. Specifically, when the four anti-collision protection mechanisms 3 move synchronously, the rotation direction of the four annular racks 308 and the four connecting rods 405 can refer to the attached Figure 8 shown.

[0033] As attached Figure 6 , Figure 7 As shown, it also includes a deceleration and reset mechanism 5, which includes a hydraulic damper 501 arranged between the main frame 1 and the support member B406, and the support member B406 is slidably arranged on the main frame 1. Specifically, a slider 502 is provided on the main frame 1, and the support member B406 is threadedly connected to the connecting rod 405.

[0034] Working principle: when the connecting rod 405 rotates, it drives the support member B406 to slide on the main frame 1 and squeezes the hydraulic damper 501. When the connecting rod 405 is reset, the hydraulic damper 501 can slow down the rotation speed of the connecting rod 405 and slow down the reset speed of the connecting rod 405. In specific use, when the drone is hit, the anti-collision protection mechanism 3 will slowly reset after protecting the blades through movement, ensuring that the anti-collision protection mechanism 3 will not reset in advance before the blades come into contact with the impact object, especially when the impact force of the drone is too large and the rollover is serious, the drone may fall. The deceleration and reset mechanism 5 can prevent the anti-collision protection mechanism 3 from resetting in advance before the drone falls, and can also prevent the ground from colliding with the blades when the drone falls.

[0035] In addition, it should be noted that in this embodiment, the protection plate 309 is a single-layer structure, located above the blade, mainly to protect the blade from the upper side when a rollover occurs in a collision. In order to be able to provide comprehensive protection for the blade when the drone falls, the protection plate 309 can also be a double-layer structure, and when protecting the blade, protection is provided from the upper and lower sides of the blade respectively.

[0036] As attached Figure 1 , Figure 2 , Figure 5 , Fig. 9As shown, in this embodiment, an auxiliary plate is provided on the rotating shaft B403, and a rotating shaft C is provided between the upper ring body 201 and the lower ring body 202, and a cylindrical gear C meshing with the annular rack 308 is provided on the rotating shaft C, and an auxiliary plate is also provided on the rotating shaft C, that is, five protection plates 309 and three auxiliary plates are provided on one sub-frame 2, and the five protection plates 309 and the three auxiliary plates move synchronously, which can provide more comprehensive coverage and better protection effect when protecting the blades.

[0037] As attached Figure 1 , Figure 2 , Fig. 9 As shown, in this embodiment, when the protection plate 309 rotates to the minimum angle, it is located between the upper ring body 201 and the lower ring body 202. When it rotates to the maximum angle, along the radial direction of the sub-frame 2, it can be specifically achieved through the rotation range of the rotation axis A305. For example, the rotation range of the rotation axis A305 is 0-90°. When the rotation axis A305 rotates 0°, the state of the protection plate 309 is as shown in the attached figure. Figure 1 , Figure 2 As shown in the figure, it can be completely separated from the blades and does not cause any obstruction to the blades in the vertical direction. When the rotation axis A305 rotates 90°, as shown in the figure Fig. 9 As shown, each protection plate 309 can reasonably cover the blades, avoiding large gaps at the axis position, and achieving a better protection effect.

[0038] As attached Figure 1 , Figure 2 As shown, the anti-collision piece 301 is ring-shaped and made of elastic material, that is, the anti-collision piece 301 can produce a certain deformation when it is hit. When a slight collision occurs and the impact force is small, the anti-collision piece 301 can directly play an anti-collision protection role through the deformation. During this process, the protection plate 309 will not move, which can reduce the unnecessary impact of the protection plate 309 on the blades. When the collision force is large and rollover occurs, after the anti-collision piece 301 is deformed to the maximum, the protection plate 309 starts to move to protect the blades.

[0039] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An anti-collision protection device for an unmanned aerial vehicle, comprising a main frame (1), a plurality of sub-frames (2) being arranged on the main frame (1), and an anti-collision protection mechanism (3) being arranged on the sub-frames (2), characterized in that: The anti-collision protection mechanism (3) comprises a plurality of anti-collision protection members, the anti-collision protection members comprising a protection plate (309) relatively rotatably arranged on the sub-frame (2) and an anti-collision member (301) relatively slidably arranged on the sub-frame (2), the rotation axis A (305) of the protection plate (309) being along the vertical direction, the sliding direction of the anti-collision member (301) being along the radial direction of the sub-frame (2), and an elastic limiting member for elastically limiting the anti-collision member (301), the anti-collision member (301) being transmission-connected to the protection plate (309), when the anti-collision member (301) moves close to the center of the sub-frame (2), the protection plate (309) is driven to rotate toward the center of the sub-frame (2), and the plurality of anti-collision protection members are transmission-connected to each other, the plurality of anti-collision protection mechanisms (3) are transmission-connected to each other, and the plurality of anti-collision members (301) and the plurality of protection plates (309) move synchronously.

2. The anti-collision protection device for an unmanned aerial vehicle according to claim 1, characterized in that: The anti-collision protection mechanism (3) comprises an annular rack (308) rotatably arranged on the sub-frame (2); a cylindrical gear A (306) meshingly connected to the annular rack (308) is arranged on the rotating shaft A (305); a bevel gear A (307) is also arranged on the rotating shaft A (305); the bevel gear A (307) is meshingly connected to a bevel gear B (304); the bevel gear B (304) is connected to a ball screw (303); the ball screw (303) is connected to the ball screw (304); 3) is rotatably provided with a support member A (310), the support member A (310) is relatively fixedly connected to the sub-frame (2), the ball screw (303) is externally threaded with a sleeve rod (302), the anti-collision member (301) is arranged on the sleeve rod (302), and the elastic limit member includes a rotating plate (311) rotatably provided on a side of the ball screw (303) close to the sleeve rod (302), and a spring (312) is connected to one end of the rotating plate (311) and the sleeve rod (302).

3. The anti-collision protection device for an unmanned aerial vehicle according to claim 2, characterized in that: The sub-frame (2) comprises an upper ring body (201) and a lower ring body (202) which are arranged in an upper and a lower position. The rotation axis A (305) is arranged between the upper ring body (201) and the lower ring body (202) and is rotationally connected to the upper ring body (201) and the lower ring body (202) respectively. In a natural state, the protection plate (309) is stored between the upper ring body (201) and the lower ring body (202).

4. The anti-collision protection device for an unmanned aerial vehicle according to claim 3, characterized in that: The annular rack (308) is rotatably arranged on the circumference of the lower ring body (202), and a fixing rod (313) is arranged between the support member A (310) and the upper ring body (201).

5. The anti-collision protection device for an unmanned aerial vehicle according to claim 3, characterized in that: An even number of anti-collision protection mechanisms (3) are provided, and a transmission mechanism (4) is provided between adjacent anti-collision protection mechanisms (3). The transmission mechanism (4) comprises a rotating shaft B (403) provided between an upper ring body (201) and a lower ring body (202), the rotating shaft B (403) being rotatably connected to the upper ring body (201) and the lower ring body (202) respectively in a vertical direction, a cylindrical gear B (401) meshingly connected to an annular rack (308) is provided on the rotating shaft B (403), a bevel gear C (402) is also provided on the rotating shaft B (403), the bevel gear C (402) is meshingly connected to a bevel gear D (404), a connecting rod (405) is provided between two adjacent bevel gears D (404), a support member B (406) is rotatably provided on the connecting rod (405), and the support member B (406) is connected to the main frame (1).

6. The anti-collision protection device for an unmanned aerial vehicle according to claim 5, characterized in that: The invention also comprises a deceleration and reset mechanism (5), wherein the deceleration and reset mechanism (5) comprises a hydraulic damper (501) arranged between the main frame (1) and the support member B (406), wherein the support member B (406) is slidably arranged on the main frame (1) and is threadedly connected to the connecting rod (405).

7. The anti-collision protection device for an unmanned aerial vehicle according to claim 5, characterized in that: An auxiliary plate is provided on the rotating shaft B (403).

8. The anti-collision protection device for a drone according to any one of claims 1 to 7, characterized in that: When the protection plate (309) is rotated to the minimum angle, it is located between the upper ring body (201) and the lower ring body (202); when it is rotated to the maximum angle, it is located along the radial direction of the sub-frame (2).

9. The anti-collision protection device for a drone according to any one of claims 1 to 7, characterized in that: The anti-collision piece (301) is ring-shaped and is made of elastic material.

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