A drone propeller protection device

Abstract

This utility model relates to the field of unmanned aerial vehicle (UAV) technology and provides a UAV propeller protection device, including a lower protective cover. The UAV propeller protection device further includes an upper protective cover, which is disposed on top of the lower protective cover and is coaxially arranged with the lower protective cover; and four connecting columns, the top ends of which are connected to the bottom of the lower protective cover. In this utility model, by setting a snap-fit ​​component, the arc-shaped plate of the snap-fit ​​component can rotate through a pivot. During assembly, the limiting ring pushes the arc-shaped plate to automatically open, and the elastic element automatically resets to achieve fastening. During disassembly, only external force is needed to push the arc-shaped plate to compress the elastic element to release the locking of the limiting ring, and disassembly can be completed without the aid of tools. Compared with the traditional bolt fixing operation that requires tightening nuts one by one, this design greatly shortens the disassembly time and makes it more convenient to replace the connecting columns and repair the protective cover in the future, thus reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a UAV propeller protection device. Background Technology

[0002] With the rapid iteration of consumer and industrial drone technologies, drones have been widely used in aerial surveying, agricultural plant protection, power line inspection, and logistics transportation. As the core power component of a drone, the propeller's operational stability directly determines its flight safety and operational efficiency. However, in real-world applications, drones often face complex operating environments, such as collisions with obstacles like trees and buildings during low-altitude flight, propeller scraping due to uneven ground or foreign object interference during takeoff and landing, and blade deformation caused by vibration and compression during transportation and storage. These situations can easily lead to propeller damage.

[0003] In the prior art, such as Chinese Patent Publication No. CN221757762U, a fixed base, a retaining ring, and a cantilever are included. One end of the fixed base is welded to the bottom side wall of the retaining ring, the bottom of the cantilever is in contact with the surface of the fixed base, and a propeller is installed on one end of the cantilever and engaged with the inside of the retaining ring. The feature is that a fixed protective device is welded to the outer wall of the fixed base and the retaining ring. The fixed protective device consists of a fixed mechanism and a protective mechanism. The fixed end of the fixed mechanism is welded to the bottom of the fixed base, and the connecting end is fixedly connected to the outer wall of the cantilever. The fixed end of the protective mechanism is welded to the outer ring of the retaining ring, and the inside covers the propeller. The protective device is applicable to different types of UAVs through the cooperation of the clamping part, the fastening part, and the locking part. At the same time, the protective barrier formed by the protective mechanism covers the propeller, which can better protect the propeller from damage.

[0004] While the above-mentioned solutions have the advantages mentioned above, their disadvantages are that the original protective cover is a fixed welded structure. When the propeller needs to be replaced or repaired, the entire protective device needs to be disassembled, which is cumbersome. In addition, the original protective mechanism forms a rigid protective barrier by adding a lower protective cover, a protective cover, and a connecting column. Although it can block impacts, the impact energy can be directly transmitted to the retaining ring and the fuselage. Utility Model Content

[0005] The purpose of this invention is to solve the problem that in the existing technology, the protective cover is a fixed welded structure, which requires disassembling the entire protective device when the propeller needs to be replaced or repaired, making the operation cumbersome.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a drone propeller protection device, comprising a lower protective cover, and the drone propeller protection device further comprising: An upper protective cover is disposed on top of the lower protective cover, and the upper protective cover and the lower protective cover are coaxially arranged; The number of connecting posts is set to four, and the top of the multiple connecting posts is connected to the bottom of the lower protective cover; The number of rubber pads is set to four, and the multiple rubber pads are all attached to the bottom of the connecting column, and the multiple rubber pads are all attached to the top of the lower protective cover; The number of snap-fit ​​components is set to four, and all of the snap-fit ​​components are located on the top of the lower protective cover, and all of the snap-fit ​​components are coaxially arranged with the connecting column; The number of buffer components is set to four, and all of the buffer components are disposed on the outer surface of the connecting column.

[0007] In a preferred embodiment, the snap-fit ​​component includes: A fixing block is installed at the bottom end of the connecting column; A limiting ring is installed at the bottom of the fixing block; The mounting slot is located at the top of the lower protective cover; Mounting plate, installed on the bottom wall of the mounting groove; A hinge groove is formed on the top of the mounting plate; A rotating shaft is installed in the middle of the inner cavity of the hinge groove; Two arc-shaped plates are rotatably mounted on the rotating shaft. The two arc-shaped plates are hinged to the mounting plate through the rotating shaft. The curvature of the inner wall of the two arc-shaped plates is adapted to the outer surface of the limiting ring.

[0008] The technical effects of adopting the above-mentioned further solution are as follows: the fixing block is fixed to the bottom of the connecting column, which drives the limiting ring to be positioned synchronously; the mounting groove and the mounting plate provide a fixed base for the snap-fit ​​structure; the hinge groove and the rotating shaft provide a rotation fulcrum for the arc plate; the curvature of the inner wall of the arc plate is adapted to the outer surface of the limiting ring, so that the arc plate can fit tightly against the limiting ring.

[0009] In a preferred embodiment, the snap-fit ​​component further includes: Two connecting blocks are installed on one side of the two arc-shaped plates; Two elastic elements are installed between the mounting plate and the two connecting blocks.

[0010] The technical effect of adopting the above-mentioned further solution is as follows: the elastic element connects the mounting plate and the connecting block. In its natural state, the connecting block is pushed by its own tension, so that the arc plate is always tightly fastened to the limiting ring. When the drone vibrates during flight or the connecting column is subjected to slight impact, the elastic element can absorb the force through deformation, preventing the arc plate from gapping due to vibration, and always maintaining the clamping state of the limiting ring, preventing the connecting column from loosening and ensuring structural stability.

[0011] In a preferred embodiment, the buffer includes: A highly elastic silicone sleeve is attached to the outer surface of the connecting post; Multiple annular grooves are formed on the outer surface of the connecting post.

[0012] The technical effect of adopting the above-mentioned further solution is that the high-elasticity silicone sleeve is pasted on the outer surface of the connecting column to prevent the impact force from being directly transmitted to the connection node between the lower protective cover and the connecting column, thereby reducing the damage to the components caused by impact.

[0013] In a preferred embodiment, the buffer further includes: Multiple high-density sponge pads are attached to the inner surfaces of the lower and upper protective covers; Multiple scratch-resistant and wear-resistant coatings are sprayed onto the surface of the high-density sponge pad.

[0014] The technical effects of adopting the above-mentioned further solution are as follows: the high-density sponge pad is pasted on the inside of the protective cover. When the propeller approaches the protective cover due to vibration or slight collision, the sponge pad buffers the impact force through compression deformation, avoiding rigid contact between the propeller blades and the protective cover, which would lead to wear. The scratch-resistant and wear-resistant coating sprayed on the surface of the sponge pad can directly resist the friction between the propeller and the sponge pad when rotating at high speed, preventing the sponge pad from breaking, extending the service life of the buffer component, and at the same time preventing sponge debris from falling off and affecting the operation of the propeller.

[0015] As a preferred embodiment, the drone propeller protection device further includes: A retaining ring is located at the middle of the bottom of the lower protective cover, and the outer ring of the retaining ring is welded to the inner wall of the lower protective cover.

[0016] The technical effect of adopting the above-mentioned further solution is that the outer ring of the retaining ring is welded to the inner wall of the lower protective cover to form a solid annular support structure, providing stable bottom support for the lower protective cover.

[0017] As a preferred embodiment, the drone propeller protection device further includes: A fixing seat is installed on one side of the retaining ring, and the bottom of the fixing seat is in contact with the surface of the retaining ring.

[0018] The technical effect of adopting the above-mentioned further solution is that the force of the device is distributed to the two nodes of the retaining ring and the fixed seat, avoiding damage caused by excessive force on a single connection point; the fixed seat can be fixed to the UAV fuselage by bolts or other means, further improving the overall connection strength between the device and the fuselage, and preventing the device from falling off during flight.

[0019] As a preferred embodiment, the drone propeller protection device further includes: The number of openings is set to four, and all of the openings are opened on the top of the high-density sponge pad. The openings are coaxially arranged with the mounting groove and the rubber pad.

[0020] The technical advantage of adopting the above-mentioned further solution is that the opening is coaxial with the mounting groove, which can directly expose the snap-fit ​​component below.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This utility model features a snap-fit ​​component. The arc-shaped plate of the snap-fit ​​component can rotate via a pivot. During assembly, the limiting ring pushes the arc-shaped plate to open automatically, and the elastic element automatically resets to achieve locking. During disassembly, only external force is needed to push the arc-shaped plate to compress the elastic element, which can release the locking ring and complete disassembly without the need for tools. Compared with the traditional bolt fixing operation that requires tightening nuts one by one, this design significantly shortens the disassembly time and makes it more convenient to replace the connecting column and repair the protective cover in the future, thus reducing maintenance costs.

[0022] This invention utilizes carbon fiber composite material for both the upper and lower protective covers. This material combines high strength and lightweight properties. When encountering obstacles such as branches and stones, the protective covers can directly withstand most of the impact force, preventing the obstacles from directly contacting the propeller. Simultaneously, the bending and fracture resistance of carbon fiber prevents damage to the protective covers under impact, ensuring the integrity of the protective structure. A 3-5mm thick high-elasticity silicone sleeve adhered to the outer surface of the connecting column, along with an annular groove along the length of the connecting column, constitutes a middle-layer energy-absorbing structure. When the impact force is transmitted to the connecting column, the high-elasticity silicone sleeve deforms due to its own elasticity. The annular grooves absorb impact energy, increasing the deformation space of the silicone sleeve, improving energy absorption efficiency, and reducing the transmission of impact force to the retaining ring, mounting base, and drone fuselage, thus preventing damage to the fuselage due to impact. The high-density sponge pads adhered to the inner surfaces of the lower and upper protective covers form an inner buffer barrier. If an obstacle breaks through the outer protective cover, the high-density sponge pads can further buffer the remaining impact force through compression deformation, preventing the impact from acting directly on the propeller. At the same time, the scratch-resistant and wear-resistant coating sprayed on the surface of the sponge pads can reduce frictional wear between the propeller and the sponge pads during high-speed rotation, protecting the propeller blades and extending the service life of the sponge pads. Attached Figure Description

[0023] Figure 1 This is a perspective view of an embodiment of this application; Figure 2 This is a perspective view of the protective cover in an embodiment of this application; Figure 3 This is an embodiment of the present application. Figure 3 Enlarged view of point A; Figure 4 This is a perspective view of the protective cover according to an embodiment of this application; Figure 5 This is a perspective view of the connector according to an embodiment of this application.

[0024] Legend: 1. Fixed base; 2. Snap ring; 3. Lower protective cover; 4. Upper protective cover; 5. High-density sponge pad; 6. Scratch-resistant and wear-resistant coating; 7. Connecting column; 8. Limiting ring; 9. Fixing block; 10. Rubber pad; 11. Annular groove; 12. High-elasticity silicone sleeve; 13. Mounting groove; 14. Arc plate; 15. Connecting block; 16. Elastic element; 17. Mounting plate; 18. Hinge groove; 19. Rotating shaft; 20. Opening. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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] Example 1: Please see Figures 1-5 This embodiment provides a drone propeller protection device, the specific idea of ​​which is as follows: A drone propeller protection device includes a lower protective cover 3, and the drone propeller protection device also includes an upper protective cover 4, a connecting column 7, a rubber pad 10, and a snap-fit ​​component.

[0027] The upper protective cover 4, which plays a protective role, is located on top of the lower protective cover 3, and the upper protective cover 4 and the lower protective cover 3 are coaxially arranged.

[0028] In addition, the number of connecting posts 7 is set to four, and the top of the multiple connecting posts 7 is riveted to the bottom of the lower protective cover 3.

[0029] The number of rubber pads 10 is set to four, and multiple rubber pads 10 are attached to the bottom of the connecting column 7, and multiple rubber pads 10 are attached to the top of the lower protective cover 3.

[0030] In addition, the number of snap-fit ​​components is set to four, with multiple snap-fit ​​components located on the top of the lower protective cover 3, and multiple snap-fit ​​components coaxially arranged with the connecting post 7.

[0031] As examples, in this embodiment, the snap-fit ​​component includes: a fixing block 9, a limiting ring 8, a mounting groove 13, a mounting plate 17, a hinge groove 18, a rotating shaft 19, two arc-shaped plates 14, two connecting blocks 15, and two elastic elements 16.

[0032] The fixing block 9 is fixedly installed at the bottom end of the connecting column 7.

[0033] In addition, the limiting ring 8, which serves as a limit, is fixedly installed at the bottom of the fixing block 9.

[0034] The mounting slot 13 is located on the top of the lower protective cover 3.

[0035] In addition, the mounting plate 17 is fixedly installed on the bottom wall of the mounting groove 13.

[0036] The hinge groove 18 is located on the top of the mounting plate 17.

[0037] In addition, the pivot 19 is installed in the middle of the inner cavity of the hinge groove 18.

[0038] Two arc-shaped plates 14 are rotatably mounted on the rotating shaft 19, and the curvature of the inner wall of the two arc-shaped plates 14 is adapted to the outer surface of the limiting ring 8.

[0039] Two connecting blocks 15 are fixedly installed on one side of the outside of the two arc-shaped plates 14.

[0040] In addition, two elastic elements 16 are installed between the two connecting blocks 15 and the two sides of the mounting plate 17.

[0041] In this embodiment, during installation, the fixing block 9 at the bottom of the connecting post 7 drives the limiting ring 8 to move down synchronously. After the limiting ring 8 contacts the two arc-shaped plates 14 of the snap-fit ​​component, it pushes the arc-shaped plates 14 to rotate outward around the rotating shaft 19. At this time, the connecting block 15 on one side of the arc-shaped plate 14 compresses the elastic element 16. When the limiting ring 8 completely enters the area surrounded by the arc-shaped plate 14, the elastic element 16 releases the tension, pushes the connecting block 15 to drive the arc-shaped plate 14 to reset. By utilizing the curvature that matches the inner wall of the arc-shaped plate 14 with the outer surface of the limiting ring 8, the arc-shaped plate 14 tightly snaps onto the limiting ring 8, thus completing the snap-fit ​​locking of the connecting post 7.

[0042] Example 2: Please see Figures 1-5 Based on Example 1, this example provides a drone propeller protection device, the specific concept of which is as follows: The drone propeller protection device also includes: a retaining ring 2, a fixing base 1, an opening 20, and a buffer.

[0043] The retaining ring 2 is located at the middle of the bottom of the lower protective cover 3, and the outer ring of the retaining ring 2 is welded to the inner wall of the lower protective cover 3.

[0044] The fixing seat 1 is fixedly installed on one side of the retaining ring 2, and the bottom of the fixing seat 1 is in contact with the surface of the retaining ring 2.

[0045] The number of openings 20 is set to four, and multiple openings 20 are opened on the top of the high-density sponge pad 5. Multiple openings 20 are coaxially arranged with the mounting groove 13 and the rubber pad 10.

[0046] The number of buffer components is set to four, and multiple buffer components are set on the outer surface of the connecting column 7.

[0047] As some examples, in this embodiment, the buffer includes: a highly elastic silicone sleeve 12, a plurality of annular grooves 11, a plurality of high-density sponge pads 5, and a scratch-resistant and abrasion-resistant coating 6.

[0048] The lower protective cover 3 and the upper protective cover 4 are made of carbon fiber composite material.

[0049] In addition, a high-elasticity silicone sleeve 12 is attached to the outer surface of the connecting post 7, and the thickness of the high-elasticity silicone sleeve 12 is set to 3-5mm.

[0050] Multiple annular grooves 11 are formed along the length of the outer surface of the connecting column 7.

[0051] Multiple high-density sponge pads 5 are attached to the inner surfaces of the lower protective cover 3 and the upper protective cover 4.

[0052] In addition, the surfaces of multiple high-density sponge pads 5 are coated with a scratch-resistant and wear-resistant coating 6, which not only prevents the propeller from rubbing against the inner wall of the protective cover when rotating at high speed, but also further buffers the impact force in the event of a minor collision.

[0053] In this embodiment, the upper protective cover 4 and the lower protective cover 3 are made of carbon fiber composite material. This material has both high strength and lightweight characteristics. When encountering obstacles such as branches and stones, the protective cover can directly resist most of the impact force, preventing the obstacles from directly contacting the propeller. At the same time, the bending and fracture resistance of carbon fiber material can prevent the protective cover from being damaged under impact, ensuring the integrity of the protective structure. The 3-5mm thick high-elasticity silicone sleeve 12 pasted on the outer surface of the connecting column 7, and the annular groove 11 opened along the length of the connecting column 7, constitute the middle energy absorption structure. When the impact force is transmitted to the connecting column 7, the high-elasticity silicone sleeve 12 deforms through its own elasticity. The annular groove 11 absorbs impact energy, increases the deformation space of the silicone sleeve, improves energy absorption efficiency, and reduces the transmission of impact force to the retaining ring 2, fixing seat 1, and drone fuselage, preventing damage to the fuselage due to impact. The high-density sponge pad 5 attached to the inner surface of the lower protective cover 3 and the upper protective cover 4 forms an inner buffer barrier. If an obstacle breaks through the outer protective cover, the high-density sponge pad 5 can further buffer the remaining impact force through compression deformation, preventing the impact from acting directly on the propeller. At the same time, the scratch-resistant and wear-resistant coating 6 sprayed on the surface of the sponge pad can reduce the frictional wear between the propeller and the sponge pad when the propeller rotates at high speed, protecting the propeller blades and extending the service life of the sponge pad.

[0054] Working principle: In use, first, fix the tops of the four connecting posts 7 to the bottom of the lower protective cover 3 using a riveting process, ensuring that the connecting posts 7 are perpendicular and stable to the lower protective cover 3. Then, attach rubber pads 10 to the bottom of each connecting post 7, making the rubber pads 10 completely fit the top surface of the lower protective cover 3. The elastic deformation of the rubber pads 10 fills the assembly gap between the connecting posts 7 and the lower protective cover 3, reducing vibration transmission. Then, align the fixing block 9 and the limiting ring 8 on the top of the upper protective cover 4 with the mounting groove 13 on the top of the lower protective cover 3, and then press the upper protective cover 4 downwards to make the limiting ring 13 ... The positioning ring 8 moves into the two arc-shaped plates 14. The two arc-shaped plates 14 are obstructed by the force above, and thus open to both sides through the elastic element 16. The two arc-shaped plates 14 rotate on the rotating shaft 19, so that the positioning ring 8 enters into the two arc-shaped plates 14. After entering, the two arc-shaped plates 14 return to their original position. Using the curvature that matches the outer surface of the positioning ring 8, the arc-shaped plates 14 naturally fit against the outer wall of the positioning ring 8. The elastic element 16 pushes the arc-shaped plates 14 tightly to fasten the positioning ring 8 through its own tension, thus completing the fixation of the connecting column 7 and the lower protective cover 3.

[0055] When the drone encounters obstacles such as tree branches or buildings during flight, the upper protective cover 4 and the lower protective cover 3 (made of carbon fiber composite material) first bear the external impact force. The high strength of the material can prevent the protective cover from breaking directly. If the impact force is transmitted to the connecting post 7, the high-elasticity silicone sleeve 12 on the outer surface of the connecting post 7 will absorb the impact energy through deformation. The annular groove 11 further enhances the deformation space of the silicone sleeve, reducing the transmission of impact force to the retaining ring 2 and the fixing seat 1. If the obstacle breaks through the outer layer of the protective cover, the high-density sponge pad 5 on the inner side will further cushion the remaining impact. The impact resistance and the scratch-resistant and wear-resistant coating 6 prevent the propeller from being damaged by friction with the sponge pad when it rotates at high speed. At the same time, when the drone is flying, the vibration generated by the high-speed rotation of the propeller will be transmitted to the lower protective cover 3 through the retaining ring 2. The rubber pad 10 at the bottom of the connecting column 7 can weaken the vibration through elastic deformation, preventing the vibration from causing the protective cover to collide with the propeller. In the closed space formed by the upper protective cover 4 and the lower protective cover 3, the high-density sponge pad 5 can reduce the airflow eddies. Combined with the ventilation effect of the opening 20, it can prevent the propeller wake from accumulating in the protective cover and ensure the stable propeller wind power output.

[0056] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0057] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A drone propeller protection device, comprising a lower protective cover (3), characterized in that, The drone propeller protection device also includes: An upper protective cover (4) is disposed on top of the lower protective cover (3), and the upper protective cover (4) and the lower protective cover (3) are coaxially disposed. Connecting posts (7), the number of which is set to four, the top of the multiple connecting posts (7) is connected to the bottom of the lower protective cover (3); Rubber pads (10), the quantity is set to four, multiple rubber pads (10) are all pasted on the bottom end of the connecting column (7), and multiple rubber pads (10) are all attached to the top of the lower protective cover (3); The number of snap-fit ​​components is set to four, and all of the snap-fit ​​components are located on the top of the lower protective cover (3), and all of the snap-fit ​​components are coaxially arranged with the connecting post (7); The number of buffer components is set to four, and all of the buffer components are disposed on the outer surface of the connecting column (7).

2. The UAV propeller protection device according to claim 1, characterized in that, The snap-fit ​​component includes: A fixing block (9) is installed at the bottom end of the connecting column (7); A limiting ring (8) is installed at the bottom of the fixing block (9); A mounting slot (13) is provided on the top of the lower protective cover (3); a mounting plate (17) is installed on the bottom wall of the mounting slot (13); A hinge groove (18) is provided on the top of the mounting plate (17); A rotating shaft (19) is installed in the middle of the inner cavity of the hinge groove (18); Two arc-shaped plates (14) are rotatably mounted on the rotating shaft (19). The two arc-shaped plates (14) are hinged to the mounting plate (17) through the rotating shaft (19). The curvature of the inner wall of the two arc-shaped plates (14) is adapted to the outer surface of the limiting ring (8).

3. The UAV propeller protection device according to claim 2, characterized in that, The snap-fit ​​connector also includes: Two connecting blocks (15) are installed on one side of the two arc-shaped plates (14); Two elastic elements (16) are installed between the mounting plate (17) and the two connecting blocks (15).

4. The UAV propeller protection device according to claim 1, characterized in that, The buffer includes: A high-elasticity silicone sleeve (12) is attached to the outer surface of the connecting post (7); Multiple annular grooves (11) are formed on the outer surface of the connecting post (7).

5. A drone propeller protection device according to claim 4, characterized in that, The buffer also includes: Multiple high-density sponge pads (5) are attached to the inner surfaces of the lower protective cover (3) and the upper protective cover (4); Multiple scratch-resistant and wear-resistant coatings (6) are sprayed onto the surface of the high-density sponge pad (5).

6. A drone propeller protection device according to claim 1, characterized in that, The drone propeller protection device also includes: A retaining ring (2) is located at the middle position of the bottom of the lower protective cover (3), and the outer ring of the retaining ring (2) is welded to the inner wall of the lower protective cover (3).

7. A drone propeller protection device according to claim 6, characterized in that, The drone propeller protection device also includes: A fixing seat (1) is installed on one side of the retaining ring (2), and the bottom of the fixing seat (1) is in contact with the surface of the retaining ring (2).

8. A drone propeller protection device according to claim 5, characterized in that, The drone propeller protection device also includes: The number of openings (20) is set to four. All of the openings (20) are opened on the top of the high-density sponge pad (5). The openings (20) are coaxially arranged with the mounting groove (13) and the rubber pad (10).

Images