Unmanned aerial vehicle propeller blade folding device and unmanned aerial vehicle

Abstract

The application relates to the technical field of unmanned aerial vehicles, and particularly discloses an unmanned aerial vehicle propeller blade folding device and an unmanned aerial vehicle. The device comprises a propeller base provided with a containing space and a mounting hole, a propeller clamp assembly arranged at the mounting hole, the propeller clamp assembly being used for fixing the propeller blade and being capable of rotating along the central axis of the mounting hole; a locking assembly arranged in the containing space, the locking assembly comprising a pressing rod, a lower pressing plate arranged in the containing space and connected to one end of the pressing rod, and a baffle fixedly connected with the propeller base and used for encapsulating the lower pressing plate in the containing space; limit holes are arranged at two ends of the lower pressing plate respectively, a top pin is slidably connected to the limit holes, one end of the top pin extends to the outer surface of the upper surface of the propeller base, and the other end of the top pin is coaxially provided with an elastic piece abutting against the baffle. The device can control the top pin to synchronously decouple the propeller clamp assembly by extruding the pressing rod, the vibration of the propeller blade and the front and back swinging phenomenon of the propeller blade are reduced, the propeller blade can be synchronously folded and unlocked, and the operation is more convenient.

Description

Technical Field

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

[0002] Currently, the propeller blades used in multi-rotor drones are mainly of two types: integrated propeller blades and folding propeller blades (two blades are fixed to the blade clamp by a pin). For integrated propeller blades, the fixed blades are inconvenient to store, especially the integrated blades installed on medium and large drones are large in size. When entering or leaving the mission site, a large space is required for transportation or disassembly and separate packaging for transportation, which increases transportation and disassembly costs.

[0003] Foldable propeller blades are easy to store as they can rotate, solving the design flaws of integrated propeller blades. However, existing foldable propeller drones experience uneven force on the blades during flight due to forward and backward movements and the influence of their own inertia, causing the propeller blades to swing back and forth, resulting in tip path plane (TPP) tilting and response lag. Furthermore, to facilitate folding, there is a gap between the blades and the blade clamps, leading to significant vibrations during flight, making the drone unstable and generating considerable noise. Additionally, this type of propeller requires step-by-step operation for decoupling, increasing the operational difficulty. Utility Model Content

[0004] This utility model proposes a drone propeller blade folding device and a drone, aiming to at least solve the problems in the related art where the propeller base structure of drones suffers from uneven force on the blades during flight and the influence of its own inertia, causing the propeller blades to swing back and forth, resulting in TPP tilting and response lag. At the same time, the vibration is large, making the drone's flight attitude unstable, generating a lot of noise, and making decoupling operation difficult.

[0005] In a first aspect, this application provides a drone propeller blade folding device, comprising: The paddle holder has a receiving space and mounting holes respectively provided on both sides of the receiving space; A propeller clamp assembly is disposed at the mounting hole. The propeller clamp assembly is used to fix the propeller blade, and the propeller clamp assembly rotates along the central axis of the mounting hole when driven. A locking assembly is disposed within the receiving space. The locking assembly includes a pressing rod extending into the receiving space at one end, a lower pressure plate disposed within the receiving space and connected to one end of the pressing rod, and a baffle fixedly connected to the propeller seat and encapsulating the lower pressure plate within the receiving space. Limiting holes are respectively provided at both ends of the lower pressure plate, and a top pin is slidably connected to the limiting holes. One end of the top pin extends beyond the upper surface of the propeller seat, and the other end is coaxially provided with an elastic element that abuts against the baffle. The pressing rod is squeezed to control the top pin to decouple the propeller clamp assembly.

[0006] In some embodiments, a first limiting groove and a second limiting groove are stacked in the accommodating space, the lower pressure plate is installed in the first limiting groove and can selectively slide along the depth direction of the first limiting groove, and the baffle is installed in the second limiting groove and fixedly connected to the paddle seat.

[0007] In some embodiments, the bottom of the first limiting groove is provided with a first guide hole that penetrates the paddle seat along the direction away from the second limiting groove, and one end of the pressing rod passes through the first guide hole and is connected to the lower pressure plate.

[0008] In some embodiments, a second guide hole is provided at the bottom of the first limiting groove near the first guide hole, penetrating the propeller seat, and one end of the top pin protrudes from the top surface of the propeller seat through the second guide hole.

[0009] In some embodiments, the propeller clamp assembly includes a rotating shaft, a limiting plate, and a propeller cover. The rotating shaft is rotatably connected to the mounting hole, the limiting plate is sleeved on the rotating shaft, and the propeller cover is connected to the end of the rotating shaft opposite to the mounting hole. A connection area for the propeller blade is formed between the propeller cover and the limiting plate.

[0010] In some embodiments, a first limiting pin is provided on the surface of the limiting plate facing the propeller cover, and a second limiting pin is provided on the surface of the propeller cover facing the limiting plate. The first limiting pin and the second limiting pin are used to fix the propeller blade.

[0011] In some embodiments, the end of the limiting plate away from the first limiting pin is provided with a pin hole, which is configured to cooperate with the top pin to selectively lock the propeller blade.

[0012] In some embodiments, the limiting plate has a locked state and an unlocked state. When in the locked state, one end of the top pin extends into the pin hole to restrict the rotational freedom of the propeller clamp assembly. When the limiting plate is in the unlocked state, one end of the top pin exits the pin hole to release the rotational freedom of the propeller clamp assembly.

[0013] In some embodiments, the bottom surface of the limiting plate is provided with a guide groove extending from one end face to the pin hole, the guide groove being used to guide the top pin to slide into the pin hole when the limiting plate rotates.

[0014] Secondly, embodiments of this application provide a drone, the drone including a drone propeller folding device as described in any of the first aspects above.

[0015] Compared with the prior art, one or more technical solutions provided in this application have at least the following beneficial effects or advantages: This device utilizes a propeller clamp assembly and a locking assembly. The propeller clamp assembly secures the propeller blades and can rotate around its connection point with the propeller mount. The locking assembly comprises a pressing rod, a lower pressure plate, a baffle, a top pin, and an elastic element. The pressing rod controls the downward movement of the lower pressure plate and the top pin. The elastic element resets the lower pressure plate and the top pin after they are pressed down. When the propeller blades need to be deployed, the propeller blades and the propeller clamp assembly rotate together. When the propeller blades are fully deployed to the corresponding position, the top pin automatically springs back to its original position under the action of the elastic element, interlocking with the pin hole of the propeller clamp assembly. This secures the folded propeller blades into a single unit, significantly reducing propeller blade vibration and swaying. After flight, when folding the propeller blades, pressing the pressing rod in conjunction with the lower pressure plate presses down the top pin, separating it from the pin hole of the propeller clamp assembly. Then, rotating both propeller blades allows for simultaneous folding and unlocking, converting the single unit propeller into a folding propeller, making operation more convenient.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the propeller blade folding device provided according to an embodiment of this application; Figure 2 This is an exploded view of the propeller blade folding device provided in the embodiments of this application; Figure 3 This is a schematic diagram of the propeller mount provided according to an embodiment of this application; Figure 4 This is a side view of the propeller mount provided according to an embodiment of this application; Figure 5 It is based on Figure 4 A cross-sectional view along the AA direction; Figure 6 This is a schematic diagram of the propeller clamp assembly provided according to an embodiment of this application; Figure 7 This is a schematic diagram of the locking component provided according to an embodiment of this application.

[0019] Figure label: 100. Folding device; 200. Propeller blade; 10. Paddle mount; 11. Mounting hole; 12. Accommodation space; 121. First limiting groove; 122. Second limiting groove; 123. First guide hole; 124. Second guide hole; 20. Propeller clamp assembly; 21. Rotating shaft; 22. Limiting plate; 221. First limiting pin; 222. Pin hole; 223. Guide groove; 23. Propeller cover; 231. Second limiting pin; 24. Sleeve; 25. Washer nut; 30. Locking assembly; 31. Pressing rod; 311. Button cover; 32. Lower pressure plate; 321. Third guide hole; 33. Baffle; 331. Protrusion; 34. Top pin; 341. Baffle plate; 35. Elastic element. Detailed Implementation

[0020] The embodiments of this application are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely for explaining this application and are not intended to limit this application.

[0021] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. "Multiple" means at least two, that is, two or more; "multiple" means at least two, that is, two or more.

[0022] In this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0025] Please see Figures 1 to 3 This embodiment discloses a drone propeller blade folding device. The folding device 100 includes a propeller base 10, a propeller clamp assembly 20, and a locking assembly 30. The propeller base 10 has a receiving space 12 and mounting holes 11 respectively disposed on both sides of the receiving space 12. The receiving space 12 is disposed in the middle area of ​​the propeller base 10. The mounting holes 11 are disposed on the left and right sides of the propeller base 10. The two mounting holes 11 are symmetrically arranged and penetrate the propeller base 10 in a vertical direction. The propeller clamp assembly 20 is disposed in the mounting holes 11. The propeller clamp assembly 20 is used to fix the propeller blade 200, and the propeller clamp assembly 20 can rotate along the central axis of the mounting holes 11. Specifically, after the propeller clamp assembly 20 is installed in the mounting hole 11, it is fixed and limited in the vertical direction, that is, the propeller clamp assembly 20 can only rotate. The locking assembly 30 is set in the receiving space 12. The locking assembly 30 can lock and unlock the propeller clamp assembly 20, so that the propeller blade 200 can be folded during transportation to save space and facilitate transportation. Before the drone needs to fly, the propeller clamp assembly 20 can be rotated to achieve interlocking through the locking assembly 30, thereby reducing the vibration of the propeller blade 200 and the back-and-forth swing of the propeller blade 200, making the drone more responsive during operation and optimizing the drone's handling feel.

[0026] The locking assembly 30 includes a pressing rod 31 extending into the receiving space 12, a lower pressure plate 32 disposed in the receiving space 12 and connected to one end of the pressing rod 31, and a baffle 33 fixedly connected to the propeller seat 10 and encapsulating the lower pressure plate 32 in the receiving space 12. The lower pressure plate 32 has limit holes at both ends, and a top pin 34 is slidably connected to the limit holes. One end of the top pin 34 extends to the outside of the upper surface of the propeller seat 10, and the other end is coaxially provided with an elastic element 35 that abuts against the baffle 33. The pressing rod 31 is squeezed to control the top pin 34 to synchronously decouple the propeller clamp assembly 20.

[0027] It should be understood that the pressing rod 31 can extend vertically from the top of the paddle seat 10 through a preset through hole into the receiving space 12 and be fixedly connected to the lower pressing plate 32. The lower pressing plate 32 has a certain shape in the receiving space 12 along the vertical direction. That is, the baffle 33 is not used to fix the lower pressing plate 32. Instead, the baffle 33 is set so that the lower pressing plate 32 can squeeze the elastic element 35 together with the top pin 34 during the pressing process. Thus, the elastic element 35 accumulates elastic potential energy during the pressing process. When the pressing rod 31 is released, the lower pressing plate 32 and the top pin 34 are reset through the elastic force of the elastic element 35.

[0028] The propeller clamp assembly 20 can be provided with a pin hole 222. During the rotation of the propeller clamp assembly 20, the trajectory of the pin hole 222 needs to meet the requirement that at a certain moment it is exactly above the top pin 34. Thus, when it is necessary to lock the propeller blade 200, the top pin 34 is controlled to extend into the pin hole 222 to lock the propeller clamp assembly 20, so that the propeller clamp assembly 20 cannot rotate. When it is necessary to unlock, the top pin 34 is moved downward in the vertical direction by squeezing the pressing rod 31, so that the top pin 34 is disengaged from the pin hole 222, thereby unlocking the propeller clamp assembly 20.

[0029] It should be noted that there are two top pins 34, located on the left and right sides of the pressing rod 31 respectively. The elastic element 35 can be a spring structure or other structure made of elastic material. The baffle 33 can be fixed to the propeller seat 10 with bolts. Similarly, one end of the pressing rod 31 can also be fixed to the lower pressure plate 32 with bolts. After the drone is assembled, when it is needed to fly, the propeller blade 200 is manually rotated to drive the propeller clamp assembly 20 to rotate. When it is rotated to a fully flat position, the propeller clamp assembly 20 can be locked by the top pins 34. At the same time, the locking assembly 30 is synchronously decoupled. Specifically, the top pin 34 is reset under the action of the elastic element 35 and is pushed into the pin hole 222 on the fixing plate to achieve interlocking. If it is necessary to fold and store the integrated propeller, the pressing rod 31 can be pressed down. Under the action of the lower pressure plate 32, the top pin 34 mechanism is pressed down, the top pin 34 is separated from the propeller clamp assembly 20, the propeller blade 200 is folded, and synchronous unlocking is achieved.

[0030] In this embodiment, the propeller clamp assembly 20 and the locking assembly 30 are used to fix the propeller blade 200 and can rotate around the connection point with the propeller seat 10. The locking assembly 30 is configured with a pressing rod 31, a lower pressing plate 32, a baffle 33, a top pin 34, and an elastic element 35. The pressing rod 31 can control the lower pressing plate 32 and the top pin 34 to move downwards, and the elastic element 35 is used to reset the lower pressing plate 32 and the top pin 34 after they are pressed down. When it is necessary to deploy the propeller blade 200, the propeller blade 200 and the propeller clamp assembly 20 are controlled to rotate together. When the propeller blade 200 rotates... When fully unfolded to the corresponding position, the top pin 34 will automatically spring back to its original position under the action of the elastic element 35, interlocking with the pin hole 222 of the propeller clamp assembly 20, thereby fixing the folded propeller blade into an integrated propeller, greatly reducing the vibration of the propeller blade 200 and the back-and-forth swaying phenomenon of the propeller blade 200. After the flight, when folding the propeller blade, the top pin 34 is pressed down by pressing the pressing rod 31 in conjunction with the lower pressing plate 32, so that the top pin 34 is separated from the pin hole 222 of the propeller clamp assembly 20. Then, the propeller blades on both sides can be rotated to achieve synchronous folding and unlocking, changing from an integrated propeller to a folding propeller, making the operation more convenient.

[0031] Please see Figures 2 to 5 In some embodiments, the mounting hole 11 of the propeller holder 10 can be a cylindrical hole that runs vertically through the bearing. A receiving space 12 is disposed between two mounting holes 11. The receiving space 12 is provided with a first limiting groove 121 and a second limiting groove 122 from top to bottom. The lower pressure plate 32 is installed in the first limiting groove 121 and can slide along the depth direction of the first limiting groove 121. The baffle 33 is installed in the second limiting groove 122 and is fixedly connected to the propeller holder 10. The depth of the first limiting groove 121 in the vertical direction should be greater than the thickness of the lower pressure plate 32. In order to make the lower pressure plate 32 move only in the vertical direction and avoid the lower pressure plate 32 from circumferentially offset, the projection contour of the first limiting groove 121 from top to bottom should be adapted to the projection contour of the lower pressure plate 32 from top to bottom. Similarly, the projection contours of the baffle 33 and the second limiting groove 122 can also be adapted to each other.

[0032] This configuration facilitates the installation of the propeller clamp assembly 20 and the locking assembly 30 on the propeller mount 10. At the same time, the multiple components of the propeller clamp assembly 20 have matching areas within the accommodating space 12, making the structure more compact. On the other hand, it facilitates the synchronous decoupling control of the propeller clamp assemblies 20 on both sides through the locking assembly 30.

[0033] Optionally, the bottom of the first limiting groove 121 is provided with a first guide hole 123 penetrating the propeller seat 10 in a direction opposite to the second limiting groove 122. One end of the pressing rod 31 passes through the first guide hole 123 and is connected to the lower pressure plate 32. The bottom of the first limiting groove 121 is provided with a second guide hole 124 penetrating the propeller seat 10 near the first guide hole 123. One end of the top pin 34 passes through the second guide hole 124 and protrudes from the top surface of the propeller seat 10. It should be understood that the first guide hole 123 can be set at the middle position of the propeller seat 10 and opened vertically to communicate with the receiving space 12. The vertical contour of the first guide hole 123 is adapted to the pressing rod 31, and the vertical contour of the second guide hole is adapted to the top pin 34. This arrangement makes the movement of the top pin 34 and the lower pressure plate 32 more stable, and also makes it easier for the operator to fold the propeller blade 200.

[0034] Please see Figure 2 and Figure 6 Two propeller clamp assemblies 20 are respectively installed in the mounting holes 11 on both sides of the propeller base 10. Specifically, the propeller clamp assembly 20 may include a rotating shaft 21, a limiting plate 22, and a propeller cover 23. The rotating shaft 21 is rotatably connected to the mounting hole 11, the limiting plate 22 is sleeved on the rotating shaft 21, and the propeller cover 23 is connected to the end of the rotating shaft 21 away from the mounting hole 11. A connection area of ​​the propeller blade 200 is formed between the propeller cover 23 and the limiting plate 22. The limiting plate 22 can be sleeved on the rotating shaft 21 by opening a through hole that matches the outer contour of the rotating shaft 21. In order to avoid friction between the lower surface of the limiting plate 22 and the propeller base 10, a boss can be provided on the rotating shaft 21. The boss protrudes in a direction away from the central axis of the rotating shaft 21 to support the lower surface of the limiting plate 22.

[0035] To prevent relative sliding between the limiting plate 22 and the rotating shaft 21, the outer contour of the rotating shaft 21 can be set to be non-circular. During the installation process, firstly, the rotating shaft 21 is installed in the mounting hole 11, and the rotating shaft 21 is rotatably connected to the mounting hole 11. Then, the limiting plate 22 is sleeved on the rotating shaft 21. Next, the corresponding propeller blade 200 is sleeved on the rotating shaft 21. Then, the propeller cover 23 is installed on the rotating shaft 21. The propeller cover 23 and the limiting plate 22 achieve upper and lower limit fixation of the propeller blade 200. The irregular setting of the outer contour of the rotating shaft 21 restricts the circumferential degree of freedom of the propeller blade 200 after it is sleeved, so that the propeller blade 200 can only rotate synchronously with the propeller clamp assembly 20.

[0036] Optionally, in order to reduce the frictional force of the relative rotation between the rotating shaft 21 and the mounting hole 11 and to facilitate the installation of the propeller clamp assembly 20, the propeller clamp assembly 20 may also include a sleeve 24 and a washer nut 25. The sleeve 24 can be installed between the rotating shaft 21 and the mounting hole 11. The sleeve 24 can be a bearing structure. The sleeve 24 and the mounting hole 11 are relatively fixed. The rotating shaft 21 can be opened with a through hole along the central axis. So when fixing the propeller blade 200, the bolts pass through the propeller cover 23, the propeller blade 200 and the rotating shaft 21 in sequence and are screwed to the washer nut 25, thereby installing the entire propeller clamp assembly 20 on the mounting hole 11.

[0037] Optionally, a first limiting pin 221 is provided on the surface of the limiting plate 22 facing the propeller cover 23, and a second limiting pin 231 is provided on the surface of the propeller cover 23 facing the limiting plate 22. The first limiting pin 221 and the second limiting pin 231 are used to fix the propeller blade 200. With the setting of the first limiting pin 221 and the second limiting pin 231, and with through holes opened at the relative positions of the propeller blade 200, the first limiting pin 221 and the second limiting pin 231 can be inserted into the through holes when the propeller blade 200 is installed, thereby making the propeller blade 200 more securely installed on the propeller clamp assembly 20.

[0038] In one example, the end of the limiting plate 22 away from the first limiting pin 221 is provided with a pin hole 222. The pin hole 222 is configured to cooperate with the top pin 34 to selectively lock the propeller blade 200. The limiting plate 22 has a locked state and an unlocked state. When it is in the locked state, one end of the top pin 34 extends into the pin hole 222 to restrict the rotation of the propeller clamp assembly 20. When the limiting plate 22 is in the unlocked state, one end of the top pin 34 exits the pin hole 222, allowing the propeller clamp assembly 20 to rotate. Specifically, the position of the pin hole 222 needs to satisfy that at a certain moment during the rotation of the limiting plate 22, it is coaxial with the top pin 34, or at a certain moment the top pin 34 can slide into the pin hole 222, thereby realizing the fixation of the propeller clamp assembly 20 and the propeller blade 200 by the top pin 34.

[0039] Optionally, the bottom surface of the limiting plate 22 is provided with a guide groove 223 extending from one end face to the pin hole 222. The guide groove 223 allows the top pin 34 to slide into the pin hole 222 more quickly. That is, the guide groove 223 can guide the top pin 34 and reduce the resistance between the top pin 34 and the limiting plate 22.

[0040] Please see Figure 2 and Figure 7In some embodiments, a button cover 311 can be provided at the end of the pressing rod 31 away from the lower pressure plate 32. The button cover 311 facilitates the operator to press down the pressing rod 31. The lower pressure plate 32 has third guide holes 321 on both sides. A baffle 341 is provided circumferentially on the top pin 34. The baffle 341 is provided radially along the top pin 34. The outer contour of the baffle 341 along the vertical direction is larger than the third guide hole 321. Thus, when the top pin 34 slides in the third guide hole 321, it is prevented from disengaging from the third guide hole 321. At the same time, it can limit one end of the elastic member 35. Two protrusions 331 can be provided at intervals on the top surface of the baffle 33. The protrusions 331 are positioned corresponding to the third guide holes 321. That is, the protrusions 331 can limit and fix the other end of the elastic member 35, thereby preventing the elastic member 35 from shifting during the compression process.

[0041] In some embodiments, a drone is also provided, which includes a drone propeller folding device as described in any of the above embodiments.

[0042] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0044] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0045] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A drone propeller blade folding device, characterized in that, include: The paddle holder has a receiving space and mounting holes respectively provided on both sides of the receiving space; A propeller clamp assembly is disposed at the mounting hole. The propeller clamp assembly is used to fix the propeller blade, and the propeller clamp assembly rotates along the central axis of the mounting hole when driven. A locking assembly is disposed within the receiving space. The locking assembly includes a pressing rod extending into the receiving space at one end, a lower pressure plate disposed within the receiving space and connected to one end of the pressing rod, and a baffle fixedly connected to the propeller seat and encapsulating the lower pressure plate within the receiving space. Limiting holes are respectively provided at both ends of the lower pressure plate, and a top pin is slidably connected to the limiting holes. One end of the top pin extends beyond the upper surface of the propeller seat, and the other end is coaxially provided with an elastic element that abuts against the baffle. The pressing rod is squeezed to control the top pin to decouple the propeller clamp assembly.

2. The UAV propeller blade folding device according to claim 1, characterized in that, The accommodating space is provided with a first limiting groove and a second limiting groove stacked on top of each other. The lower pressure plate is installed in the first limiting groove and can selectively slide along the depth direction of the first limiting groove. The baffle is installed in the second limiting groove and is fixedly connected to the paddle seat.

3. The UAV propeller blade folding device according to claim 2, characterized in that, The bottom of the first limiting groove is provided with a first guide hole that penetrates the paddle seat in a direction away from the second limiting groove, and one end of the pressing rod passes through the first guide hole and is connected to the lower pressure plate.

4. The UAV propeller blade folding device according to claim 3, characterized in that, The bottom of the first limiting groove is provided with a second guide hole that penetrates the propeller seat, and one end of the top pin protrudes from the top surface of the propeller seat through the second guide hole.

5. The UAV propeller blade folding device according to claim 1, characterized in that, The propeller clamp assembly includes a rotating shaft, a limiting plate, and a propeller cover. The rotating shaft is rotatably connected to the mounting hole. The limiting plate is sleeved on the rotating shaft. The propeller cover is connected to the end of the rotating shaft away from the mounting hole, and a connection area for the propeller blade is formed between the propeller cover and the limiting plate.

6. The UAV propeller blade folding device according to claim 5, characterized in that, The limiting plate has a first limiting pin on its surface facing the propeller cover, and the propeller cover has a second limiting pin on its surface facing the limiting plate. The first limiting pin and the second limiting pin are used to fix the propeller blade.

7. The UAV propeller blade folding device according to claim 6, characterized in that, The limiting plate has a pin hole at one end away from the first limiting pin. The pin hole is configured to cooperate with the top pin to selectively lock the propeller blade.

8. The UAV propeller blade folding device according to claim 7, characterized in that, The limiting plate has a locked state and an unlocked state. When it is in the locked state, one end of the top pin extends into the pin hole to restrict the rotational freedom of the propeller clamp assembly. When the limiting plate is in the unlocked state, one end of the top pin exits the pin hole to release the rotational freedom of the propeller clamp assembly.

9. The UAV propeller blade folding device according to claim 7, characterized in that, The bottom surface of the limiting plate is provided with a guide groove extending from one end face to the pin hole. The guide groove is used to guide the top pin to slide into the pin hole when the limiting plate rotates.

10. A drone, characterized in that, The drone includes a drone propeller folding device as described in any one of claims 1-9.

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