Unmanned aerial vehicle propeller locking device

Abstract

The utility model relates to the technical field of propeller locking, in particular to an unmanned aerial vehicle propeller locking device which comprises a propeller, a motor mechanism, a locking mechanism and a driving mechanism. The propeller is connected with one end of the motor mechanism, the other end of the motor mechanism is connected with one end of the locking mechanism, and the other end of the locking mechanism is connected with the output end of the driving mechanism. The locking mechanism comprises a brake disc assembly and a brake assembly; the brake assembly comprises a brake caliper component, a cam component and a transmission component. The driving mechanism drives the transmission component to rotate so as to drive the cam component to rotate, and therefore clamping and loosening of the brake disc are achieved. The locking device has the advantages that when the locking device is in a locking state, due to the fact that the cam and the brake caliper component generate mutual counter-acting force, the transmission shaft generates centripetal radial force, the transmission shaft is stabilized in a limiting area of the limiting block and abuts against the limiting block, and a driving mechanism does not need to continuously output power; the problem of extra power consumption caused by long-time locking is solved.

Description

Technical Field

[0001] This utility model relates to the field of propeller locking technology, and in particular to a drone propeller locking device. Background Technology

[0002] Drones are being used more and more widely across various industries, and among the various performance requirements for drones, the demand for long endurance is particularly prominent. In multi-rotor distributed fixed-wing or compound-wing drones, some motors shut down when in low-power cruise mode. Since the motors do not have a self-locking function after shutting down, the airflow during drone flight will drive the propellers to rotate, thereby generating additional forces and torques, which in turn affects flight efficiency.

[0003] To address this issue, aircraft require a power locking device (also known as a power brake), which locks the propeller when the motors are off, preventing it from continuing to rotate. Currently, power locking devices are mainly divided into non-contact locking devices and contact locking devices.

[0004] Non-contact locking devices typically utilize magnetic locking. Chinese Patent Publication No. CN108482646A, published on September 4, 2018, entitled "Non-contact Separate Arrangement of UAV Propeller Locking Device and Locking Method," discloses a method using three sets of permanent magnets to achieve propeller locking. However, when using permanent magnets, the magnetic force fluctuates sinusoidally, causing dynamic imbalance of the propeller during operation, leading to a series of problems, including decreased efficiency and potential mechanical damage. Chinese Patent Publication No. CN209921598U, published on January 10, 2020, entitled "A UAV Propeller Steering Locking Device and Propeller," not only achieves magnetic propeller locking but also overcomes the limitations of ESC selection, avoiding the necessity of using an ESC with braking function. However, whether it is the traditional method of using an electronic speed controller for braking or the method of using an electromagnet in the locking device described in the patent, both require constant power supply during the locking process. Although the patent can reduce power consumption to some extent compared to the traditional method of using an electronic speed controller for braking, the cumulative power consumption during long-endurance flight is still not negligible.

[0005] Contact-type locking is generally a mechanical brake, which only requires a brief power-consuming trigger moment to lock, making it more energy-efficient and reliable. However, mechanical brakes are mostly used in automobiles and are less common in aircraft. Chinese Patent Publication No. CN209567081U, published on November 1, 2019, entitled "A Propeller Locking Mechanism and a Drone Power Unit Containing the Propeller," describes a locking mechanism that uses a push-pull mechanism's top block to lock the motor. This top block contacts an angle-limiting block coaxial with the motor, creating a limit and achieving locking. This locking method can lock a propeller in a specified direction from any position, preventing rotation and limiting the propeller to a position with relatively low airflow resistance. However, this method is only applicable when the propeller is moving at low speed or almost stationary. When the propeller is driven by the airflow to rotate at high speed, the angle limiting block coaxial with the motor rotates at high speed together. The contact position between the top block and the angle limiting block is the position of maximum linear velocity. The angle limiting block will generate a large force and torque in the high-speed rotation state, which can easily damage the push-pull mechanism at the moment of contact, thus creating additional accidental risks. Utility Model Content

[0006] In view of this, the present invention aims to provide a drone propeller locking device. The locking mechanism only needs to be powered on once during start-up and shutdown, and does not consume power during long-term locking, thus fundamentally solving the problem of additional power consumption caused by locking.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows: A drone propeller locking device includes a propeller, a motor mechanism, a locking mechanism, and a drive mechanism; one end of the propeller is connected to the motor mechanism, the other end of the motor mechanism is connected to one end of the locking mechanism, and the other end of the locking mechanism is connected to the output end of the drive mechanism; the locking mechanism includes a brake disc assembly and a braking assembly; the brake disc assembly includes a brake disc; the braking assembly includes a brake caliper assembly, a cam assembly, and a transmission assembly; one end of the transmission assembly is connected to the output end of the drive mechanism, and the other end of the transmission assembly is connected to the cam assembly; the brake caliper assembly includes a first brake pad and a second brake pad, and the brake disc is located between the first brake pad and the second brake pad; the drive mechanism drives the transmission assembly to rotate, thereby driving the cam assembly to rotate, and the rotation of the cam assembly controls the distance between the first brake pad and the second brake pad, thereby achieving clamping and releasing of the brake disc.

[0008] Furthermore, the brake disc assembly also includes a motor drive shaft; one end of the motor drive shaft is connected to the motor, and the other end of the motor drive shaft is connected to the brake disc.

[0009] Furthermore, the motor mechanism includes a first motor, a first connecting frame, and a connecting rod; the first connecting frame is connected to the first motor; one end of the connecting rod is connected to the drive mechanism, and the other end of the connecting rod passes through the first connecting frame and is connected to the first brake pad; the first connecting frame has a through first hole.

[0010] Furthermore, the brake caliper component also includes a spring; one end of the spring is connected to the first brake pad, and the other end of the spring is connected to the second brake pad.

[0011] Furthermore, the cam component includes a brake shaft and a cam; the brake shaft is rotatably disposed in the first hole, and the cam is connected to the brake shaft; the brake shaft is provided with a through second hole and a third hole.

[0012] Furthermore, the extension direction of the second hole is perpendicular to the extension direction of the third hole.

[0013] Furthermore, the transmission components include a rotating disk, a limiting block, and a transmission shaft; the rotating disk is connected to the output end of the drive mechanism; the limiting block is located between the drive mechanism and the rotating disk; the limiting block has an open area and a limiting area; one end of the transmission shaft is embedded in the second hole; the other end of the transmission shaft passes through the limiting hole on the rotating disk and is located in the open area or the limiting area.

[0014] Furthermore, the drive shaft includes a drive rod and a connecting ring. The connecting ring is connected to the drive rod, and the axis of the connecting ring is perpendicular to the axis of the drive rod. The connecting ring is located in the second hole, and the pin passes through the third hole and the connecting ring in sequence, thereby connecting the drive shaft to the brake shaft.

[0015] Furthermore, the drive mechanism includes a power source and a second connecting frame, the second connecting frame being connected to the power source, and the limit block and the connecting rod being connected to the second connecting frame respectively.

[0016] Furthermore, the power source is a servo motor or an electric motor.

[0017] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0018] 1) When the locking device is in the locked state, the cam and the brake caliper components generate a mutual reaction force, which causes the drive shaft to generate a centripetal radial force, thereby stabilizing the drive shaft within the limit area of ​​the limit block and abutting against the limit block. There is no need for the drive mechanism to continuously output power, thus solving the problem of additional power consumption caused by long-term locking.

[0019] 2) The locking mechanism is located at the rear of the motor mechanism and can be completely accommodated inside the motor housing of the first motor body. Since there are no other external structures, no additional aerodynamic drag is generated.

[0020] 3) The locking device has a simple overall structure and is lightweight, so it will not add extra weight to the drone. At the same time, the locking device has a stable structure and is easy to design for equal lifespan. It will not be easily damaged by friction caused by mechanical brakes, thus effectively solving the propeller locking problem.

[0021] 4) The limit block is equipped with an open area and a limit area, so the locking function of the locking device can be realized without setting any other structures. Attached Figure Description

[0022] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the drone propeller locking device according to an embodiment of the present utility model;

[0024] Figure 2 This is an exploded view of the unmanned aerial vehicle propeller locking device without a propeller according to an embodiment of the present utility model;

[0025] Figure 3 This is a structural schematic diagram of the motor mechanism provided according to an embodiment of the present utility model;

[0026] Figure 4 This is a structural schematic diagram of the locking mechanism provided according to an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the braking assembly provided according to an embodiment of the present utility model;

[0028] Figure 6 This is a structural schematic diagram of the limiting block provided according to an embodiment of the present utility model;

[0029] Figure 7 This is a schematic diagram of the drive mechanism provided according to an embodiment of the present utility model;

[0030] Figure 8 This is a schematic diagram of the braking assembly in an unlocked state according to an embodiment of the present utility model;

[0031] Figure 9 This is a schematic diagram of the braking assembly in a locked state according to an embodiment of the present invention.

[0032] The reference numerals in the accompanying drawings include: 1. Propeller; 2. Motor mechanism; 21. First motor; 211. Second connecting hole; 22. First connecting frame; 221. First body; 2211. First hole; 222. Connecting part; 223. Limiting part; 224. First connecting hole; 23. Connecting rod; 3. Locking mechanism; 31. Brake disc assembly; 311. Brake disc; 312. Motor drive shaft; 32. Braking assembly; 321. Brake caliper assembly; 3211. First brake pad; 3212. Second brake pad; 3213. Spring 322. Spring; 3221. Cam assembly; 3222. Brake shaft; 3222. Cam; 3223. Second hole; 3224. Third hole; 323. Transmission component; 3231. Rotating disk; 3232. Limiting block; 3233. Transmission shaft; 3234. Limiting hole; 3235. Transmission rod; 3236. Connecting ring; 3237. Open area; 3238. Limiting area; 3239. Clearance opening; 4. Drive mechanism; 41. Power source; 42. Second connecting frame; 421. Fifth hole; 422. Sixth hole. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and do not constitute a limitation thereof.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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 of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] like Figures 1-7 As shown in the figure, an embodiment of the present invention provides a drone propeller locking device, including a propeller 1, a motor mechanism 2, a locking mechanism 3, and a drive mechanism 4. The propeller 1 is connected to one end of the motor mechanism 2, the other end of the motor mechanism 2 is connected to one end of the locking mechanism 3, and the other end of the locking mechanism 3 is connected to the output end of the drive mechanism 4.

[0039] Motor mechanism 2, as shown Figure 3 As shown, the device includes a first motor 21, a first connecting frame 22, and two connecting rods 23. The first connecting frame 22 includes a first body 221 and two connecting parts 222, which are respectively connected to both ends of the first body 221 and are perpendicular to the first body 221. Each connecting part 222 is provided with a limiting part 223 and a first connecting hole 224. The first motor 21 is provided with two second connecting holes 211 that are adapted to the two first connecting holes 224. When the first connecting frame 22 is connected to the first motor 21, the limiting part 223 abuts against the edge of the first motor 21, and bolts are used to fix the first connecting frame 22 to the first motor 21 through the first connecting holes 224 and the second connecting holes 211.

[0040] The first body 221 has a through hole 2211 and two fourth holes, with the axis of the first hole 2211 perpendicular to the axes of the two fourth holes. When the first connecting frame 22 is connected to the first motor 21, the axis of the first hole 2211 is perpendicular to the axis of the first motor 21, while the axis of the fourth holes is parallel to the axis of the first motor 21. Two connecting rods 23 pass through the two fourth holes and are connected to the first body 221. The ends of the two connecting rods 23 away from the first body 221 are connected to the drive mechanism 4, and the first threaded holes at the other ends of the two connecting rods 23 are connected to the locking mechanism 3 by bolts.

[0041] In this embodiment, the first motor 21 is a bidirectional output dual-axis motor, including a first output shaft and a second output shaft. The first output shaft is connected to the propeller 1 and is used to drive the propeller 1 to rotate. The second output shaft is connected to the locking mechanism 3. When the locking mechanism 3 performs a locking operation, the locking mechanism 3 locks the propeller 1 through the second output shaft. It should be noted that in this embodiment, the second connecting hole 211 is built into the first motor 21. In other embodiments, if it is difficult to install the second connecting hole 211 of the first motor 21 with the first connecting bracket 22, a motor mount can be added for transition. The motor mount only needs to be able to connect the first connecting bracket 22 and the first motor 21, and will not be described in detail here.

[0042] Locking mechanism 3, such as Figures 4-6 As shown, the system includes a brake disc assembly 31 and a braking assembly 32. The brake disc assembly 31 includes a brake disc 311 and a motor drive shaft 312. One end of the motor drive shaft 312 is connected to the second output shaft of the first motor 21, and the other end of the motor drive shaft 312 is connected to the brake disc 311. The axes of the brake disc 311, the motor drive shaft 312, and the first motor 21 are located on the same axis.

[0043] The braking assembly 32 includes a brake caliper component 321, a cam component 322, and a transmission component 323. One end of the transmission component 323 is connected to the output end of the drive mechanism 4, and the other end of the transmission component 323 is connected to the cam component 322.

[0044] The brake caliper component 321 includes a first brake pad 3211, a second brake pad 3212, and a spring 3213. The first brake pad 3211 has two through holes, and the second brake pad 3212 has two second threaded holes corresponding to the positions of the two through holes. A bolt is screwed into the second threaded holes of the second brake pad 3212 and passes through the through holes of the first brake pad 3211 to be screwed into the first threaded hole of the connecting rod 23 near the end of the first body 221. The first brake pad 3211 is movable along the length of the connecting rod 23.

[0045] One end of the spring 3213 is connected to the first brake pad 3211, and the other end of the spring 3213 is connected to the second brake pad 3212. At this time, the spring 3213 does not deform. The brake disc 311 is located between the first brake pad 3211 and the second brake pad 3212, and there is a gap between the disc and the first brake pad 3211 and the second brake pad 3212 to ensure that they do not come into contact with each other in the unlocked state.

[0046] The drive mechanism 4 drives the transmission component 323 to rotate, which in turn drives the cam component 322 to rotate. The rotation of the cam component 322 controls the distance between the first brake pad 3211 and the second brake pad 3212, thereby achieving the clamping and releasing of the brake disc 311.

[0047] When it is necessary to lock the propeller 1, the drive mechanism 4 drives the transmission component 323 to rotate, which in turn drives the cam component 322 to rotate. The rotation of the cam component 322 pushes the first brake pad 3211 to move towards the brake disc 311, pushing the brake disc 311 to press against the second brake pad 3212, thereby clamping the brake disc 311 and locking the propeller 1 through the motor drive shaft 312. When it is necessary to release the lock on the propeller 1, the drive mechanism 4 drives the transmission component 323 to rotate in the opposite direction, which in turn drives the cam component 322 to rotate, causing the cam component 322 to disengage from the first brake pad 3211. The elastic force of the spring 3213 moves the first brake pad 3211 away from the second brake pad 3212 and returns the first brake pad 3211 to its unclamped position. Due to the effect of rotational inertia, the brake disc 311 will automatically separate from the second brake pad 3212 under the reaction force of friction, thereby releasing the lock on the propeller 1.

[0048] The cam component 322 includes a brake shaft 3221, a cam 3222, a limiting ring 3225, and a limiting shaft 3226. The cam 3222 is connected to the connecting end of the brake shaft 3221. The limiting ring 3225 is sleeved on the outer surface of the brake shaft 3221 and abuts against the end face of the first body 221. The brake shaft 3221 passes through a first hole 2211 and is connected to the cam 3222, allowing it to rotate within the first hole 2211. The brake shaft 3221 has a through second hole 3223, a third hole 3224, and a seventh hole. The extending direction of the second hole 3223 is perpendicular to the extending direction of the third hole 3224. The extending direction of the seventh hole is parallel to the extending direction of the third hole 3224 and is located below the second hole 3223 and above the limiting ring 3225. The limiting shaft 3226 passes through the seventh hole. The limiting ring 3225 and the limiting shaft 3226 are used to limit the axial position of the cam component 322. In this embodiment, the second hole 3223 is a rectangular hole, and the third hole 3224 and the seventh hole are both round holes.

[0049] The transmission component 323 includes a rotating disk 3231, a limiting block 3232, and a transmission shaft 3233. The rotating disk 3231 is connected to the output end of the drive mechanism 4. The limiting block 3232 is connected to the drive mechanism 4 and is located between the drive mechanism 4 and the rotating disk 3231. The rotating disk 3231 has a limiting hole 3234, and the connecting section of the transmission shaft 3233 is embedded in the second hole 3223. The free end of the transmission shaft 3233 passes through the limiting hole 3234. The transmission shaft 3233 includes a transmission rod 3235 and a connecting ring 3236. The connecting ring 3236 is connected to the connecting end of the transmission rod 3235, and the axis of the connecting ring 3236 is perpendicular to the axis of the transmission rod 3235. The free end of the transmission rod 3235 passes through the limiting hole 3234. The connecting ring 3236 is located inside the second hole 3223. The pin passes through the third hole 3224 and the connecting ring 3236 in sequence, thereby connecting the drive shaft 3233 to the brake shaft 3221. The limiting block 3232 has an open area 3237, a limiting area 3238, and a clearance opening 3239. The clearance opening 3239 is used to avoid the rotating disk 3231. The open area 3237 is located below the clearance opening 3239, and the limiting area 3238 is located on the side wall of the limiting block 3232 near the clearance opening 3239.

[0050] In this embodiment, in order to reduce the weight of the rotating disk 3231, a weight-reducing hole is also provided on the rotating disk 3231.

[0051] When the locking mechanism 3 is in the unlocked state, the free end of the drive shaft 3233 passing through the limiting hole 3234 is located within the open area 3237. Figure 8 As shown in Figure A). At this time, cam 3222 is not in contact with the first brake pad 3211 (as shown in Figure A). Figure 8 As shown in Figure B), there is a gap between the brake disc 311 and the first brake pad 3211 and the second brake pad 3212, allowing the brake disc 311 to rotate freely.

[0052] When the locking mechanism 3 is in the locked state, the free end of the drive shaft 3233 is located in the limiting area 3238. Figure 9 As shown in Figure A). At this time, cam 3222 abuts against the first brake pad 3211 (as shown in Figure A). Figure 9 As shown in Figure B), the brake disc 311 is clamped by the first brake pad 3211 and the second brake pad 3212.

[0053] The drive mechanism 4 includes a power source 41 and a second connecting frame 42. The output end of the power source 41 is connected to the rotating disk 3231. The power source 41 is a servo motor or a motor. The second connecting frame 42 is provided with two fifth holes 421 and two sixth holes 422. The two fifth holes 421 are respectively connected to two connecting rods 23. The fifth holes 421 are elongated holes that can adjust the position of the two connecting rods 23. The limiting block 3232 is connected to the second connecting frame 42 through the two sixth holes 422. Specifically, bolts pass through the limiting block 3232 and the two sixth holes 422 in sequence, so that the limiting block 3232 is connected to the second connecting frame 42.

[0054] The working process of the UAV propeller locking device is described below with reference to the accompanying drawings.

[0055] Power source 41 drives the free end of drive shaft 3233 to rotate from open area 3237 to limiting area 3238 via rotating disk 3231. During the rotation of drive shaft 3233, connecting ring 3236 rotates around pin in second hole 3223, simultaneously driving brake shaft 3221 to rotate, which in turn drives cam 3222 to rotate, causing cam 3222 to contact first brake pad 3211 and push the first brake pad 3211 to move, thereby achieving the clamping of brake caliper component 321 on brake disc 311 and completing the locking of propeller 1. At this time, cam 3222 and brake caliper component 321 generate mutual reaction force, which is transmitted to drive shaft 3233, causing drive shaft 3233 to contact limiting area 3238 and generate pressure, thereby stabilizing drive shaft 3233 within limiting area 3238 of limiting block 3232 and abutting against limiting block 3232, without the need for power source 41 to continuously output power.

[0056] When the locking mechanism 3 is unlocked, the power source 41 drives the rotating disk 3231 to rotate the transmission shaft 3233 in the opposite direction, so that the free end of the transmission shaft 3233 rotates from the limiting area 3238 to the open area 3237. The cam 3222 releases its contact with the brake caliper component 321, and the brake caliper component 321 releases its clamping on the brake disc 311, thereby releasing the lock on the propeller 1.

[0057] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A drone propeller locking device, characterized in that, It includes a propeller, a motor mechanism, a locking mechanism, and a drive mechanism; the propeller is connected to one end of the motor mechanism, the other end of the motor mechanism is connected to one end of the locking mechanism, and the other end of the locking mechanism is connected to the output end of the drive mechanism; The locking mechanism includes a brake disc assembly and a braking assembly; the brake disc assembly includes a brake disc; the braking assembly includes a brake caliper assembly, a cam assembly, and a transmission assembly; one end of the transmission assembly is connected to the output end of the drive mechanism, and the other end of the transmission assembly is connected to the cam assembly; the brake caliper assembly includes a first brake pad and a second brake pad, and the brake disc is located between the first brake pad and the second brake pad; The drive mechanism drives the transmission component to rotate, which in turn drives the cam component to rotate. The rotation of the cam component controls the distance between the first brake pad and the second brake pad, thereby achieving the clamping and releasing of the brake disc.

2. The UAV propeller locking device according to claim 1, characterized in that, The brake disc assembly also includes a motor drive shaft; one end of the motor drive shaft is connected to the motor, and the other end of the motor drive shaft is connected to the brake disc.

3. The UAV propeller locking device according to claim 1, characterized in that, The motor mechanism includes a first motor, a first connecting frame, and a connecting rod; the first connecting frame is connected to the first motor; one end of the connecting rod is connected to the drive mechanism, and the other end of the connecting rod passes through the first connecting frame and is connected to the first brake pad; the first connecting frame has a through hole.

4. The UAV propeller locking device according to claim 3, characterized in that, The brake caliper component also includes a spring; one end of the spring is connected to the first brake pad, and the other end of the spring is connected to the second brake pad.

5. The UAV propeller locking device according to claim 4, characterized in that, The cam component includes a brake shaft and a cam; the brake shaft is rotatably disposed in the first hole, and the cam is connected to the brake shaft; the brake shaft is provided with a through second hole and a third hole.

6. The UAV propeller locking device according to claim 5, characterized in that, The extension direction of the second hole is perpendicular to the extension direction of the third hole.

7. The UAV propeller locking device according to claim 5, characterized in that, The transmission component includes a rotating disk, a limiting block, and a transmission shaft; the rotating disk is connected to the output end of the driving mechanism; the limiting block is located between the driving mechanism and the rotating disk; the limiting block has an open area and a limiting area; the connecting end of the transmission shaft is embedded in the second hole; the free end of the transmission shaft passes through the limiting hole on the rotating disk and is located in the open area or the limiting area.

8. The UAV propeller locking device according to claim 7, characterized in that, The drive shaft includes a drive rod and a connecting ring. The connecting ring is connected to the drive rod, and the axis of the connecting ring is perpendicular to the axis of the drive rod. The connecting ring is located in the second hole, and the pin passes through the third hole and the connecting ring in sequence, thereby connecting the drive shaft to the brake shaft.

9. The UAV propeller locking device according to claim 7, characterized in that, The drive mechanism includes a power source and a second connecting frame, the second connecting frame being connected to the power source, and the limiting block and the connecting rod being connected to the second connecting frame respectively.

10. The UAV propeller locking device according to claim 9, characterized in that, The power source is a servo motor or an electric motor.

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