Unmanned aerial vehicle rotor feathering mechanism and unmanned aerial vehicle

Abstract

The utility model provides an unmanned aerial vehicle rotor feathering mechanism and an unmanned aerial vehicle. The unmanned aerial vehicle rotor feathering mechanism comprises a propeller, a rotor motor, a motor fixing base, a fixed magnetic suction cup and a movable magnetic suction cup. The rotor motor comprises a stator structure and an outer rotor structure; the stator structure comprises a mounting seat; the propeller is fixedly installed on the outer rotor structure and rotates along with the outer rotor structure. The motor fixing seat is connected to the mounting seat; the fixed magnetic suction cup is installed on the motor fixing base and provided with at least one set of first magnets. The dynamic magnetic suction cup is mounted on the outer peripheral surface of the outer rotor structure and is provided with at least one group of second magnets; when the rotor motor stops rotating or the rotating speed is lower than a preset threshold value, the movable magnetic suction cup rotates under the magnetic coupling effect of the first magnet and the second magnet so as to drive the outer rotor structure to rotate to a preset smoothening position, and the propeller is kept at the smoothening position. The technical problem that the propeller generates large air dynamic resistance after the rotor wing motor stops working can be solved.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, specifically to a UAV rotor feathering mechanism and a UAV. Background Technology

[0002] The compound-wing vertical takeoff and landing (VTOL) drone is a type of drone that combines the aerodynamic layout of a fixed wing and a rotor, enabling it to achieve vertical takeoff and landing (VTOL) and efficient level flight. Compared to traditional fixed-wing drones, compound-wing drones can take off and land without a runway, and also have the advantages of long endurance, high speed, and long range. Therefore, they have broad application prospects in fields such as oil pipeline inspection, power line inspection, and forest fire prevention.

[0003] However, during level flight cruising, the rotor motors of compound-wing UAVs typically cease operation, and the propellers enter a free-rotating state. Due to airflow disturbances, the propellers may rotate randomly or remain stationary in non-optimal positions. If a stationary propeller is not strictly aligned with the airflow direction (i.e., not in a feathered position), its blades will generate significant aerodynamic drag on the windward side, leading to reduced UAV cruising efficiency and increased energy consumption. Furthermore, changes in airflow can cause irregular propeller rotation, inducing attitude disturbances in the UAV and affecting flight stability.

[0004] Currently, most compound-wing UAVs lack an effective rotor feathering mechanism, resulting in the propeller's inability to automatically adjust to a low-drag position during the cruise phase. Therefore, there is an urgent need for a mechanism that can automatically adjust the propeller to a feathering position after the rotor motor stops, in order to reduce aerodynamic drag, improve cruise efficiency, and enhance flight stability. Utility Model Content

[0005] In view of the problems existing in the prior art, the present invention provides a drone rotor feathering mechanism and a drone, which automatically adjusts the propeller to the feathering position after the rotor motor stops working, so as to reduce aerodynamic drag and improve cruising efficiency.

[0006] To achieve the above and other related objectives, the first aspect of this utility model provides a drone rotor feathering mechanism, comprising: a propeller, a rotor motor, a motor mounting base, a fixed magnetic chuck, and a moving magnetic chuck; the rotor motor includes a stator structure and an outer rotor structure rotatably mounted on the outer periphery of the stator structure, the stator structure including a mounting base; the propeller is fixedly mounted on the outer rotor structure and rotates with the outer rotor structure; the motor mounting base is fixedly connected to the mounting base; the fixed magnetic chuck is fixedly mounted on the motor mounting base and is provided with at least one set of first magnets; the moving magnetic chuck is mounted on the outer peripheral surface of the outer rotor structure and is provided with at least one set of second magnets; wherein, when the rotor motor stops working, the moving magnetic chuck rotates under the magnetic coupling of the first and second magnets, thereby driving the outer rotor structure to rotate to a predetermined feathering position and holding the propeller in the feathering position.

[0007] In one embodiment of this utility model, the moving magnetic chuck and the fixed magnetic chuck are arranged along the axial direction of the motor, and the minimum gap between the moving magnetic chuck and the fixed magnetic chuck in the axial direction of the rotor motor is 0.5~2mm.

[0008] In one embodiment of the present invention, the fixed magnetic chuck includes a groove portion and an annular portion. The groove portion forms a positioning fit with the mounting base. The annular portion is connected to the outer periphery of the groove portion and extends to the outer periphery of the outer rotor structure. The first magnet is mounted on the annular portion.

[0009] In one embodiment of the present invention, the moving magnetic chuck includes two semi-annular shells, which are clamped and fixed to the outer peripheral surface of the outer rotor structure by fasteners, and the second magnet is installed on the semi-annular shell.

[0010] In one embodiment of the present invention, the first magnet includes two sets of first N-pole magnets and two sets of first S-pole magnets, and the first N-pole magnets and the first S-pole magnets are arranged alternately along the circumferential direction of the fixed magnetic chuck.

[0011] In one embodiment of the present invention, the second magnet includes a second N-pole magnet corresponding to the number of the first N-pole magnets and a second S-pole magnet corresponding to the number of the first S-pole magnets; when the propeller is in the flight position, the second N-pole magnets attract the first S-pole magnets, and the second S-pole magnets attract the first N-pole magnets.

[0012] In one embodiment of this utility model, the fixed magnetic chuck is provided with multiple sets of first magnet mounting slots, and a set of first N-pole magnets or a set of first S-pole magnets can be detachably installed in a set of first magnet mounting slots; the movable magnetic chuck is provided with multiple sets of second magnet mounting slots, and a set of second N-pole magnets or a set of second S-pole magnets can be detachably installed in a set of second magnet mounting slots.

[0013] In one embodiment of the present invention, the first N-pole magnet includes a plurality of first N-pole magnet units, the first S-pole magnet includes a plurality of first S-pole magnet units, and the first magnet mounting slot includes a plurality of first slot mounting positions, with one first slot mounting position corresponding to one first N-pole magnet unit or one first S-pole magnet unit.

[0014] In one embodiment of the present invention, the second N-pole magnet includes a plurality of second N-pole magnet units, the second S-pole magnet includes a plurality of second S-pole magnet units, and the second magnet mounting slot includes a plurality of second slot mounting positions, with one second slot mounting position corresponding to one second N-pole magnet unit or one second S-pole magnet unit.

[0015] In a second aspect, this utility model provides a drone, which includes the drone rotor feathering mechanism in any of the above examples.

[0016] This invention relates to a drone rotor feathering mechanism. After the rotor motor stops operating, a moving magnetic chuck rotates under the magnetic coupling of a first and second magnet, driving the outer rotor structure to a predetermined feathering position and holding the propeller in that position. This design effectively reduces the aerodynamic drag generated by the propeller after the rotor motor stops operating, thereby improving the drone's cruising efficiency and reducing energy consumption. Furthermore, since the feathering action of the propeller in this invention utilizes the magnetic attraction principle to lock the rotor motor's rotational position, it does not consume system power and does not introduce any failure risk. Moreover, the fixed magnetic chuck is fixedly installed on the motor mounting base, which in turn is fixedly connected to the rotor motor's mounting base. This installation method requires no modification to the rotor motor's structure; only a simple installation operation is needed on the external mounting base of the rotor motor, greatly simplifying the installation process. In addition, the moving magnetic chuck is installed on the outer circumference of the outer rotor structure. Since the outer rotor structure is an existing component of the rotor motor, the installation of the moving magnetic chuck does not involve any adjustment or modification to the internal structure of the rotor motor. Therefore, the ease of installation can be further maintained. At the same time, it is also convenient to modify the existing UAV rotor feathering mechanism for lifting. Attached Figure Description

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

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the UAV rotor feathering mechanism of this utility model in one embodiment;

[0019] Figure 2 for Figure 1 Enlarged view of a portion of the UAV rotor feathering mechanism in the illustrated embodiment;

[0020] Figure 3 for Figure 1 A magnified view of a portion of the UAV rotor feathering mechanism in the illustrated embodiment from another angle;

[0021] Figure 4 This is a schematic diagram of the rotor motor structure in one embodiment of the UAV rotor feathering mechanism of this utility model;

[0022] Figure 5 This is a partial structural schematic diagram of an exploded view of a component of the UAV rotor feathering mechanism of this utility model in one embodiment;

[0023] Figure 6 This is a schematic diagram of the structure of the UAV rotor feathering mechanism of the present invention, in one embodiment, with a first magnet installed on a fixed magnetic chuck.

[0024] Figure 7 This is a schematic diagram of the structure of the UAV rotor feathering mechanism of the present invention, wherein a first slot is provided on the fixed magnetic chuck;

[0025] Figure 8 This is a schematic diagram of the overall structure of the fixed magnetic chuck in one embodiment of the UAV rotor feathering mechanism of this utility model.

[0026] Figure 9 This is a schematic diagram of the overall structure of the moving magnetic chuck in one embodiment of the UAV rotor feathering mechanism of this utility model.

[0027] Figure 10 This is a schematic diagram of a UAV rotor feathering mechanism according to one embodiment of the present invention, in which a second magnet is installed on a moving magnetic chuck.

[0028] Figure 11 This is a schematic diagram showing the position of the first magnet fixing the magnetic chuck in one embodiment of the UAV rotor feathering mechanism of this utility model;

[0029] Figure 12 This is a schematic diagram showing the position of the second magnet on the moving magnetic chuck when the propeller is in a horizontal propeller state in one embodiment of the UAV rotor feathering mechanism of this utility model.

[0030] Figure 13 This is a schematic diagram of the rotor feathering mechanism of the UAV of the present invention in one embodiment, showing the propeller rotating from the horizontal state under aerodynamic force.

[0031] Figure 14 This is a schematic diagram showing the position of the second magnet on the moving magnetic chuck when the propeller is in a feathering state in one embodiment of the UAV rotor feathering mechanism of this utility model.

[0032] Figure 15 This is a schematic diagram showing a gap between the moving magnetic chuck and the fixed magnetic chuck in one embodiment of the UAV rotor feathering mechanism of this utility model.

[0033] Component designation explanation:

[0034] 100. UAV rotor feathering mechanism; 110. Propeller; 120. Rotor motor; 121. Stator structure; 122. Rotor structure; 123. Mounting base; 124. Positioning shaft; 130. Motor mounting base; 140. Fixed magnetic chuck; 141. Groove; 142. Ring body; 1421. First magnet mounting slot; 14211. First slot mounting position; 150. Moving magnetic chuck; 151. Semi-annular shell; 1511. Second magnet mounting slot; 15111. Second slot mounting position; 160. First magnet; 161. First N-pole magnet; 1611. First N-pole magnet unit; 162. First S-pole magnet; 1621. First S-pole magnet unit; 170. Second magnet; 171. Second N-pole magnet; 1711. Second N-pole magnet unit; 172. Second S-pole magnet; 1721. Second S-pole magnet unit. Detailed Implementation

[0035] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0036] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, equipment, and materials similar to or equivalent to those in the embodiments of this invention.

[0037] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0038] Please see Figures 1 to 15This utility model provides a drone rotor feathering mechanism 100 and a drone. After the rotor motor 120 stops working, the drone rotor feathering mechanism 100 rotates under the magnetic coupling of the first magnet 160 and the second magnet 170 using a moving magnetic chuck 150. This rotation drives the outer rotor structure 122 to a predetermined feathering position and holds the propeller 110 in that position. This design effectively reduces the aerodynamic drag generated by the propeller 110 after the rotor motor 120 stops working, thereby improving the drone's cruising efficiency and reducing energy consumption.

[0039] Please see Figures 1 to 3 The UAV rotor feathering mechanism 100 provided by this utility model includes: a propeller 110, a rotor motor 120, a motor mounting base 130, a fixed magnetic chuck 140, and a moving magnetic chuck 150.

[0040] Please participate Figure 4 and Figure 5 The rotor motor 120 includes a stator structure 121 and an outer rotor structure 122. The outer rotor structure 122 is rotatably mounted on the outer periphery of the stator structure 121, and the rotatable mounting method includes, but is not limited to, bearing rotation connection. A mounting base 123 is provided at one end of the stator structure 121 in the axial direction, and a positioning shaft 124 is provided at one end of the outer rotor structure 122 in the axial direction. The positioning shaft 124 and the mounting base 123 are respectively located at both ends of the rotor motor 120 in the axial direction. The positioning shaft 124 is inserted into the center mounting of the propeller 110 for mounting and positioning the propeller 110. The end of the propeller 110 is fixedly connected to the end face of the outer rotor structure 122 by bolts or other fasteners. Rotation of the outer rotor structure 122 drives the propeller 110 to rotate synchronously. One side of the motor mounting base 130 is connected to the fuselage of the UAV by fasteners, and the other side is fixedly connected to the mounting base 123, thereby achieving a fixed connection between the motor and the UAV fuselage. When the rotor motor 120 is energized, that is, when the rotor motor 120 is working normally, the outer rotor structure 122 rotates relative to the stator structure 121 under the action of the electromagnetic field, thereby driving the propeller 110 to rotate, thus providing lift for the UAV's vertical take-off and hovering in the air.

[0041] It should be noted that since the external rotor motor is a conventional component structure in the prior art, the other internal structures of the stator structure 121 and the external rotor structure 122 will not be described in detail in this embodiment. For specific structures, please refer to the relevant structural descriptions of external rotor motors in the prior art.

[0042] Please see Figure 3 and Figure 5A fixed magnetic chuck 140 is fixedly installed on a motor mounting base 130, and the fixed magnetic chuck 140 is provided with at least one set of first magnets 160. The fixing method of the fixed magnetic chuck 140 to the motor mounting base 130 is not limited. For example, the fixed magnetic chuck 140 can be connected to the motor mounting base 130 by fasteners, or the fixed magnetic chuck 140 can be disposed between the motor mounting base 130 and the mounting base 123, and the fixed connection between the fixed magnetic chuck 140 and the mounting base 123 is achieved by the clamping force between the motor mounting base 130 and the mounting base 123. The fixed magnetic chuck 140 can be an approximately disc-shaped structure or an approximately ring-shaped structure, etc. Specifically, in this embodiment, the fixed magnetic chuck 140 is an approximately disc-shaped structure, the fixed magnetic disk is clamped between the mounting base 123 and the motor mounting base 130, and is fixedly installed between the motor mounting base 130 and the mounting base 123 by fasteners.

[0043] Please see Figure 2 and Figure 5 The moving magnetic chuck 150 is mounted on the outer peripheral surface of the outer rotor structure 122, and the moving magnetic chuck 150 is provided with at least one set of second magnets 170. The number of second magnets 170 can be the same as the number of first magnets 160, or they can be different. Optionally, in this embodiment, the number of second magnets 170 is the same as the number of first magnets 160. The moving magnetic chuck 150 can be an integral annular structure sleeved on the outer peripheral surface of the outer rotor structure 122, or it can be a plurality of spliced ​​segment structures sleeved on the outer peripheral surface of the outer rotor structure 122. The plurality of spliced ​​segment structures are connected and held tightly to the outer peripheral surface of the outer rotor structure 122 by fasteners.

[0044] After the rotor motor 120 stops working, the moving magnetic chuck 150 rotates under the magnetic coupling of the first magnet 160 and the second magnet 170, driving the outer rotor structure 122 to rotate to a predetermined plane position and holding the propeller 110 in the plane position. It should be noted that the plane position is where the direction of the propeller 110 is consistent with the heading of the UAV; in the plane position, the propeller 110 generates almost no aerodynamic drag. Specifically, when the rotor motor 120 stops working, the rotational speed of the propeller 110 drops rapidly. When the resultant force of the rotational inertia force of the propeller 110 and the airflow disturbance force in the external environment is less than the magnetic force between the first magnet 160 and the second magnet 170, the moving magnetic chuck 150 will begin to rotate under the magnetic coupling of the first magnet 160 and the second magnet 170 until it drives the outer rotor structure 122 to rotate to the predetermined plane position.

[0045] In one embodiment, the first magnet 160 may be one of an N-pole magnet and a S-pole magnet, and the second magnet 170 may be the other of an N-pole magnet and a S-pole magnet. When the rotor motor 120 stops or its speed is below a preset threshold, the first magnet 160 and the second magnet 170 attract each other, causing the moving magnetic chuck 150 to rotate, thereby driving the outer rotor structure 122 to rotate to a predetermined parasitic position. In another embodiment, the first magnet 160 may contain both an N-pole magnet and a S-pole magnet, and the second magnet 170 may contain both an N-pole magnet and a S-pole magnet. When the rotor motor 120 stops or its speed is below a preset threshold, the N-pole magnet of the first magnet 160 and the S-pole magnet of the second magnet 170 attract each other, and the S-pole magnet of the first magnet 160 and the N-pole magnet of the second magnet 170 attract each other, thereby causing the moving magnetic chuck 150 to rotate, thereby driving the outer rotor structure 122 to rotate to a predetermined parasitic position. It should be noted that when the rotor motor 120 is powered on and rotates, the torque generated can resist the attraction between the first magnet 160 and the second magnet 170, so that the rotor motor 120 can operate normally.

[0046] In this embodiment, when the rotor motor 120 stops or its speed falls below a preset threshold, the moving magnetic chuck 150 rotates under the magnetic coupling of the first magnet 160 and the second magnet 170, driving the outer rotor structure 122 to rotate to a predetermined feathering position and holding the propeller 110 in that position. This design effectively reduces the aerodynamic drag generated by the propeller 110 after the rotor motor 120 stops working, thereby improving the drone's cruise efficiency and reducing energy consumption. Simultaneously, the fixed magnetic chuck 140 is fixedly mounted on the motor mounting base 130, which in turn is fixedly connected to the motor mounting base 123. This installation method requires no modification to the structure of the rotor motor 120 itself; only a simple installation operation is needed on the external mounting base of the rotor motor 120, greatly simplifying the installation process. Furthermore, the moving magnetic chuck 150 is mounted on the outer peripheral surface of the outer rotor structure 122. Since the outer rotor structure 122 is an existing component of the rotor motor 120, the installation of the moving magnetic chuck 150 does not involve any adjustment or modification to the internal structure of the rotor motor 120, thus further maintaining the ease of installation.

[0047] Please see Figure 15In one embodiment of this utility model, the moving magnetic chuck 150 and the fixed magnetic chuck 140 are arranged along the axial direction of the rotor motor 120. The minimum gap h between the moving magnetic chuck 150 and the fixed magnetic chuck 140 in the axial direction of the motor is any value within the range of 0.5 to 2 mm, for example, h can be 0.5 mm, 1.0 mm, or 2 mm. The gap between the moving magnetic chuck 150 and the fixed magnetic chuck 140 in the axial direction of the motor can be set with equal gaps along the circumferential direction of the motor, or it can be set with unequal gaps, as long as the minimum gap h between the moving magnetic chuck 150 and the fixed magnetic chuck 140 in the axial direction of the rotor motor 120 is any value within the range of 0.5 to 2 mm. This arrangement ensures that when the moving magnetic chuck 150 rotates relative to the fixed magnetic chuck 140, there will be no friction or collision between them, thus ensuring the smooth rotation of the moving magnetic chuck 150. On the other hand, since the first magnet 160 is disposed on the fixed magnetic chuck 140 and the second magnet 170 is disposed on the moving magnetic chuck 150, by limiting the minimum gap h between the moving magnetic chuck 150 and the fixed magnetic chuck 140 in the axial direction of the motor to the range of 0.5~2mm, it can be ensured that the first magnet 160 and the second magnet 170 maintain a better magnetic attraction distance, thereby ensuring the magnitude of the magnetic attraction force and ensuring the stability and reliability of the magnetic coupling.

[0048] Please see Figure 5 and Figure 8 In one embodiment of this utility model, the fixed magnetic chuck 140 includes a groove portion 141 and an annular portion 142. The groove portion 141 is sandwiched between the motor fixing seat 130 and the mounting seat 123, and the contour shape of the groove portion 141 matches that of the mounting seat 123 to form a positioning fit. Specifically, in this embodiment, the mounting seat 123 has an approximately frustum-shaped structure, and the groove portion 141 has a corresponding frustum-shaped hole structure. The mounting seat 123 is engaged in the groove portion 141, forming a frustum-shaped surface contact, thereby forming a positioning fit. The annular portion 142 is connected to the outer periphery of the groove portion 141 and extends from the outer periphery of the groove portion 141 to the outer periphery of the outer rotor structure 122. The first magnet 160 is installed on the ring body 142. There are various installation methods. For example, the first magnet 160 can be fixedly connected to the ring body 142 by fasteners, or it can be snapped to the ring body 142 by a snap-fit ​​structure, or it can be bonded to the ring body 142 by an adhesive structure, etc.

[0049] By providing the groove portion 141 and the ring portion 142, on the one hand, since the groove portion 141 can form a positioning fit with the motor mounting base 123, the radial and axial displacement of the fixed magnetic chuck 140 can be effectively limited, thereby improving the accuracy and stability of the mounting position of the fixed magnetic chuck 140 relative to the rotor motor 120. On the other hand, the extended design of the ring portion 142 can be adjusted according to the specific shape and size of the outer rotor structure 122 to ensure optimal magnetic coupling effect. This flexibility allows the fixed magnetic chuck 140 to better adapt to the design requirements of different rotor motors 120.

[0050] To further facilitate the installation of the moving magnetic chuck 150 on the rotor motor 120, optionally, please refer to Figure 5 and Figure 10 In one embodiment of this utility model, the moving magnetic chuck 150 includes two semi-annular shells 151. The two semi-annular shells 151 are clamped and fixed to the outer peripheral surface of the outer rotor structure 122 by fasteners, and the second magnet 170 is installed on the semi-annular shells 151. The two semi-annular shells 151 can be arranged in a symmetrical or asymmetrical structure. Optionally, in this embodiment, in order to simplify the manufacturing process, the two semi-annular shells 151 are arranged in a symmetrical structure. Each end of the semi-annular shell 151 in the circumferential direction is provided with a docking end. The two semi-annular shells 151 are connected by docking at the docking ends and fastened together by fasteners. After docking, the two semi-annular shells 151 form a ring structure. The inner diameter of the ring structure matches the outer peripheral surface size of the outer rotor structure 122, so that the ring structure can be firmly clamped and fixed to the outer peripheral surface of the outer rotor structure 122 under the fastening action of the fasteners.

[0051] The second magnet 170 can be installed on only one of the semi-annular housings 151, or it can be installed on both semi-annular housings 151. In actual design, the specific installation position of the second magnet 170 needs to be determined according to the installation position of the first magnet 160 to ensure that effective magnetic coupling can be achieved between the moving magnetic chuck 150 and the fixed magnetic chuck 140.

[0052] In this embodiment, the moving magnetic chuck 150 employs a design with two semi-annular housings 151. This facilitates the installation of the moving magnetic chuck 150 from the outside of the outer rotor structure 122 without complex assembly steps. This design is particularly suitable for rapid assembly in space-constrained UAV rotor feathering mechanisms 100. Furthermore, the inner diameter of the semi-annular housing 151 can be adjusted according to the outer circumferential dimensions of the outer rotor structure 122 to ensure a tight fit between the moving magnetic chuck 150 and the outer rotor structure 122. This allows the moving magnetic chuck 150 to adapt to outer rotor structures 122 of different sizes, exhibiting good versatility and adaptability.

[0053] Please see Figure 6 In one embodiment of this utility model, the first magnet 160 includes two sets of first N-pole magnets 161 and two sets of first S-pole magnets 162, which are alternately arranged along the circumferential direction of the fixed magnetic chuck 140. The specific arrangement of the two sets of first N-pole magnets 161 and two sets of first S-pole magnets 162 on the fixed magnetic chuck 140 is not limited. For example, the two sets of first N-pole magnets 161 can be symmetrically arranged along the center of the fixed magnetic chuck 140, and the two sets of first S-pole magnets 162 can also be symmetrically arranged along the center of the fixed magnetic chuck 140. Alternatively, the two sets of first N-pole magnets 161 and two sets of first S-pole magnets 162 can also be arranged in other ways besides central symmetry. Optionally, in this embodiment, the two sets of first N-pole magnets 161 and the two sets of first S-pole magnets 162 are symmetrically arranged along the center of the fixed magnetic chuck 140. This configuration facilitates the installation and positioning of the two sets of first N-pole magnets 161 and the two sets of first S-pole magnets 162 on the fixed magnetic disk. For example... Figure 11 As shown, for ease of description, the arrangement direction of the two sets of first N pole magnets 161 is defined as the horizontal direction, and the arrangement direction of the two sets of first S pole magnets 162 is defined as the vertical direction.

[0054] In this embodiment, by alternately arranging N-pole and S-pole magnets in the circumferential direction of the fixed magnetic chuck 140, a uniform and alternating magnetic field distribution can be formed in the circumference of the fixed magnetic chuck 140. This magnetic field distribution can enhance the strength of the magnetic coupling between the first magnet 160 and the second magnet 170, allowing the moving magnetic chuck 150 to more stably drive the outer rotor structure 122 to rotate under the action of magnetic force. Compared with a single polarity arrangement, the alternating arrangement of magnets can generate a stronger magnetic field gradient, thereby improving the efficiency of magnetic coupling. At the same time, when the N pole of the first magnet 160 and the S pole of the second magnet 170 are opposite each other, an attractive force is generated, pushing the moving magnetic chuck 150 closer to the fixed magnetic chuck 140; while when the N pole of the first magnet 160 and the N pole of the second magnet 170 are opposite each other, a repulsive force is generated, pushing the moving magnetic chuck 150 away from the fixed magnetic chuck 140. Therefore, this design utilizes the alternating effects of attraction and repulsion to allow the moving magnetic chuck 150 to rotate smoothly to the predetermined feathering position under the influence of the magnetic field. This design further improves the efficiency and stability of magnetic coupling, ensures that the moving magnetic chuck 150 accurately performs the feathering function, reduces aerodynamic drag, and improves the drone's cruise efficiency.

[0055] Please see Figure 5 and Figure 10In one embodiment of this utility model, the second magnet 170 includes a second N-pole magnet 171 corresponding to the number of first N-pole magnets 161 and a second S-pole magnet 172 corresponding to the number of first S-pole magnets 162. That is, when there are two sets of first N-pole magnets 161, there are also two sets of second N-pole magnets 171; when there are two sets of first S-pole magnets 162, there are also two sets of second S-pole magnets 172. When the propeller 110 is in the parasitic position, the second N-pole magnets 171 and the first S-pole magnets 162 are attracted to each other, and the second S-pole magnets 172 and the first N-pole magnets 161 are attracted to each other. The specific arrangement of the two sets of second N-pole magnets 171 and the two sets of second S-pole magnets 172 on the moving magnetic chuck 150 can refer to the arrangement of the two sets of first N-pole magnets 161 and the two sets of first S-pole magnets 162 on the fixed magnetic chuck 140, and will not be repeated here.

[0056] It should be noted that when the rotor motor 120 stops or its speed is below a preset threshold, the relative position between the first magnet 160 and the second magnet 170 can be arbitrary. Please refer to [link / reference needed]. Figure 12 The following example illustrates the situation where the propeller 110 is in a horizontal propeller state when the rotor motor 120 stops or its speed is lower than a preset threshold.

[0057] When propeller 110 is in the horizontal propeller position, its direction is exactly perpendicular to the UAV's flight direction, meaning propeller 110 is in the position of maximum aerodynamic drag. In this position, under initial conditions, please refer to... Figure 12 The two sets of second S-pole magnets 172 on the moving magnetic chuck 150 are arranged vertically, corresponding to the positions of the two sets of first S-pole magnets 162 on the movable magnetic chuck 150. The two sets of second N-pole magnets 171 are arranged horizontally, corresponding to the positions of the two sets of first N-pole magnets 161 on the movable magnetic chuck 150. In this state, the two sets of first S-pole magnets 162 and the two sets of second S-pole magnets 172 will generate mutual repulsion, and the two sets of first N-pole magnets 161 and the two sets of second N-pole magnets 171 will also generate mutual repulsion. Combined with the unstable aerodynamic force, this forces the outer rotor structure 122 to rotate unstablely.

[0058] like Figure 13As shown, if the outer rotor structure 122 rotates in the direction of the arrow under the influence of aerodynamic force, during the rotation, the rotor motor 120 will gradually move towards the position with the greatest magnetic force under the magnetic force between the first magnet 160 and the second magnet 170. When the outer rotor structure 122 rotates to the position with the greatest magnetic force, that is, when the first S-pole magnet 162 attracts the adjacent second N-pole magnet 171, and the first N-pole magnet 161 attracts the adjacent second S-pole magnet 172, that is, when the magnetic poles of the magnets at corresponding positions of the fixed magnetic chuck 140 and the moving magnetic chuck 150 are completely opposite, as... Figure 14 As shown, at this time, the magnetic force generated between the first magnet 160 and the second magnet 170 will be greater than the aerodynamic force on the propeller 110, thereby forcing the outer rotor structure 122 to stop rotating, that is, keeping the propeller 110 in the paramount position.

[0059] In this embodiment, when the propeller 110 is in the feathering position, the second N-pole magnet 171 attracts the first S-pole magnet 162, and the second S-pole magnet 172 attracts the first N-pole magnet 161. This magnetic attraction ensures that the moving magnetic chuck 150 and the outer rotor structure 122 are stably maintained in the feathering position, reducing deviations caused by external forces or vibrations. Simultaneously, by setting the polarity correspondence between the second magnet 170 and the first magnet 160, the magnetic coupling efficiency is maximized during feathering. The magnetic force of opposite poles attracting each other can transmit power more efficiently, ensuring that the moving magnetic chuck 150 smoothly drives the outer rotor structure 122 to rotate to the feathering position.

[0060] Please see Figure 6 and Figure 7In one embodiment of this utility model, the fixed magnetic chuck 140 is provided with multiple sets of first magnet mounting slots 1421. Specifically, the first magnet mounting slots 1421 are provided in the ring body portion 142. A set of first N-pole magnets 161 or a set of first S-pole magnets 162 can be detachably installed in a set of first magnet mounting slots 1421. The shape of the first magnet mounting slot 1421 can be any shape that matches the shape of the first N-pole magnet 161 or the first S-pole magnet 162, such as a T-shaped slot structure, a rectangular slot structure, or an irregularly shaped slot structure. The shapes of the first N-pole magnet 161 and the first S-pole magnet 162 can be the same or different. Optionally, in this embodiment, the shapes of the first N-pole magnet 161 and the first S-pole magnet 162 are the same, which facilitates the setting of the first magnet mounting slots 1421. In this embodiment, the first N-pole magnet 161 or a set of first S-pole magnets 162 can be directly snapped into the first magnet mounting slots 1421, thereby achieving detachable installation. This arrangement facilitates the removal and removal of the first N-pole magnet 161 or a set of first S-pole magnets 162 within the first magnet mounting slot 1421, making it easier to adjust the magnetic force of the first magnet 160. In another embodiment, the first N-pole magnet 161 or a set of first S-pole magnets 162 may also be installed within the first magnet mounting slot 1421 and then fixedly connected within the first magnet mounting slot 1421 by fasteners or adhesives.

[0061] It should be noted that the opening of the first magnet mounting slot 1421 faces away from the motor mounting base 130. This arrangement ensures that when the drone rotor feathering mechanism 100 is installed onto the drone fuselage, the opening of the first magnet mounting slot 1421 faces upwards, preventing the first magnet 160 from detaching from the first magnet mounting slot 1421 under the magnetic force of the second magnet 170, thereby improving the stability of the first magnet 160 installation. Simultaneously, it also facilitates flexible adjustment of the number of the first N-pole magnet 161 or the first S-pole magnet 162 in the first magnet 160 after the movable magnetic chuck 150 has been installed and fixed.

[0062] Please see Figure 9 and Figure 10 The moving magnetic chuck 150 is provided with multiple sets of second magnet mounting slots 1511. A set of second N-pole magnets 171 or a set of second S-pole magnets 172 can be detachably installed within a set of second magnet mounting slots 1511. The shape of the second magnet mounting slots 1511 can refer to the shape of the first magnet mounting slot 1421 described above. The detachable installation method of the second N-pole magnets 171 and the second S-pole magnets 172 within the second magnet mounting slots 1511 can also refer to the installation method of the first N-pole magnets 161 and the first S-pole magnets 162 within the first magnet mounting slot 1421 described above, and will not be repeated here.

[0063] Similarly, the opening of the second magnet mounting slot 1511 faces the side closest to the motor mounting base 130. This arrangement ensures that when the drone rotor feathering mechanism 100 is installed onto the drone fuselage, the opening of the second magnet mounting slot 1511 faces upward, preventing the second magnet 170 from detaching from the second magnet mounting slot 1511 under the magnetic force of the first magnet 160, thereby improving the stability of the second magnet 170 installation.

[0064] In this embodiment, by providing a first magnet mounting slot 1421 and a second magnet mounting slot 1511, a detachable mounting slot design can be adopted, making the installation and removal of magnets simpler and faster, greatly reducing the time and labor required for installation and maintenance. Simultaneously, the first magnet mounting slot 1421 not only positions the first magnet 160 but also reduces its mounting height on the fixed magnetic chuck 140. Similarly, the second magnet mounting slot 1511 not only positions the second magnet 170 but also reduces its mounting height on the moving magnetic chuck 150, thereby reducing the magnetic attraction distance between the first magnet 160 and the second magnet 170 and improving the overall compactness of the installation structure.

[0065] Please see Figure 6 and Figure 7 In one embodiment of this utility model, the first N-pole magnet 161 includes a plurality of first N-pole magnet units 1611, and the first S-pole magnet 162 includes a plurality of first S-pole magnet units 1621. The first magnet mounting groove 1421 includes a plurality of first slot mounting positions 14211, each first slot mounting position 14211 corresponding to one first N-pole magnet unit 1611 or one first S-pole magnet unit 1621. Each first N-pole magnet unit 1611 and each first S-pole magnet unit 1621 can be independently installed and removed within the corresponding first slot mounting position 14211. The plurality of first N-pole magnet units 1611 and the plurality of first S-pole magnet units 1621 can be arranged in a circumferential array along the ring portion 142, or they can be arranged in a non-array arrangement. Optionally, in this embodiment, the plurality of first N-pole magnet units 1611 and the plurality of first S-pole magnet units 1621 are respectively arranged in a circumferential array along the ring portion 142. This configuration allows for convenient control of the magnetic force of the first N-pole magnet 161 and the first S-pole magnet 162.

[0066] In this embodiment, by designing the first N-pole magnet 161 and the first S-pole magnet 162 as multiple magnet units and providing multiple corresponding first slot mounting positions 14211, the number and arrangement of the magnet units can be flexibly adjusted according to actual needs. For example, increasing or decreasing the number of magnet units, or changing the arrangement order of the magnet units, can flexibly adjust the magnetic force corresponding to the first magnet 160, thereby avoiding the inability to stably attract due to weak magnetic force or the impact of excessive magnetic force on the normal operation of the rotor motor 120. Simultaneously, when a magnet unit is damaged, the corresponding magnet unit can be quickly replaced without disassembling the entire fixed magnetic chuck 140. This design not only simplifies the maintenance process but also reduces maintenance costs.

[0067] Please see Figure 9 and Figure 10 In one embodiment of this utility model, the second N-pole magnet 171 includes a plurality of second N-pole magnet units 1711, the second S-pole magnet 172 includes a plurality of second S-pole magnet units 1721, and the second magnet mounting groove 1511 includes a plurality of second slot mounting positions 15111, with one second slot mounting position 15111 corresponding to one second N-pole magnet unit 1711 or one second S-pole magnet unit 1721. Each second N-pole magnet unit 1711 and each second S-pole magnet unit 1721 can be independently installed and removed within the corresponding second slot mounting position 15111. The plurality of second N-pole magnet units 1711 and the plurality of second S-pole magnet units 1721 can be arranged in a circumferential array along the moving magnetic chuck 150, or they can be arranged in a non-array arrangement. Optionally, in this embodiment, the plurality of second N-pole magnet units 1711 and the plurality of second S-pole magnet units 1721 are respectively arranged in a circumferential array along the ring portion 142. This configuration allows for convenient control of the magnetic force of the second N-pole magnet 171 and the second S-pole magnet 172.

[0068] In this embodiment, by designing the second N-pole magnet 171 and the second S-pole magnet 172 as multiple magnet units and providing multiple corresponding second slot mounting positions 15111, the number and arrangement of the magnet units can be flexibly adjusted according to actual needs. For example, increasing or decreasing the number of magnet units, or changing the arrangement order of the magnet units, can flexibly adjust the magnetic force corresponding to the second magnet 170, thereby avoiding the inability to stably attract due to weak magnetic force or the impact of excessive magnetic force on the normal operation of the rotor motor 120. Simultaneously, when a magnet unit is damaged, the corresponding magnet unit can be quickly replaced without disassembling the entire moving magnetic suction cup 150. This design not only simplifies the maintenance process but also reduces maintenance costs.

[0069] This utility model also provides a drone, which includes a fuselage and a drone rotor feathering mechanism 100 as described in any of the above embodiments. The fuselage includes arms, and the drone rotor feathering mechanism 100 is mounted on the arms. The number of drone rotor feathering mechanisms 100 is not limited and needs to be determined according to the flight performance of the drone. The structure of other components of the drone can be referred to in the description of drone structures in the prior art, and will not be repeated in this embodiment. For the specific structure of the drone rotor feathering mechanism 100 in this embodiment, please refer to the above embodiments.

[0070] Since this UAV adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments. That is, when the rotor motor 120 stops or its speed is lower than a preset threshold, the moving magnetic chuck 150 rotates under the magnetic coupling of the first magnet 160 and the second magnet 170, which can drive the outer rotor structure 122 to rotate to a predetermined feathering position and hold the propeller 110 in that position. This design can effectively reduce the aerodynamic drag generated by the propeller 110 after the rotor motor 120 stops working, thereby improving the UAV's cruise efficiency and reducing energy consumption. At the same time, the fixed magnetic chuck 140 is fixedly installed on the motor mounting base 130, and the motor mounting base 130 is fixedly connected to the motor mounting base 123. This installation method does not require any modification to the structure of the rotor motor 120 itself, but only requires a simple installation operation on the mounting base outside the rotor motor 120, which greatly simplifies the installation process. Furthermore, the moving magnetic chuck 150 is mounted on the outer peripheral surface of the outer rotor structure 122. Since the outer rotor structure 122 is an existing component of the rotor motor 120, the installation of the moving magnetic chuck 150 does not involve any adjustment or modification to the internal structure of the rotor motor 120, thus further maintaining the ease of installation.

[0071] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A rotor feathering mechanism for an unmanned aerial vehicle (UAV), characterized in that, include: A rotor motor, the rotor motor including a stator structure and an outer rotor structure rotatably mounted on the outer periphery of the stator structure, the stator structure including a mounting base; The propeller is fixedly installed on the outer rotor structure and rotates with the outer rotor structure; A motor mounting bracket is fixedly connected to the mounting base; A fixed magnetic chuck is fixedly installed on the motor mounting base and is provided with at least one set of first magnets; A moving magnetic chuck is installed on the outer peripheral surface of the outer rotor structure and is provided with at least one set of second magnets; When the rotor motor stops working, the moving magnetic chuck rotates under the magnetic coupling of the first magnet and the second magnet, thereby driving the outer rotor structure to rotate to a predetermined propeller position and keeping the propeller in the propeller position.

2. The UAV rotor feathering mechanism according to claim 1, characterized in that, The moving magnetic chuck and the fixed magnetic chuck are arranged along the axial direction of the motor, and the minimum gap between the moving magnetic chuck and the fixed magnetic chuck in the axial direction of the rotor motor is 0.5~2mm.

3. The UAV rotor feathering mechanism according to claim 1, characterized in that, The fixed magnetic chuck includes a groove and an annular portion. The groove is positioned in conjunction with the mounting base. The annular portion is connected to the outer periphery of the groove and extends to the outer periphery of the outer rotor structure. The first magnet is mounted on the annular portion.

4. The UAV rotor feathering mechanism according to claim 1, characterized in that, The moving magnetic chuck includes two semi-annular housings, which are clamped and fixed to the outer circumferential surface of the outer rotor structure by fasteners, and the second magnet is mounted on the semi-annular housing.

5. The UAV rotor feathering mechanism according to any one of claims 1 to 4, characterized in that, The first magnet includes two sets of first N-pole magnets and two sets of first S-pole magnets, which are arranged alternately along the circumferential direction of the fixed magnetic chuck.

6. The UAV rotor feathering mechanism according to claim 5, characterized in that, The second magnet includes a second N-pole magnet corresponding to the number of the first N-pole magnets and a second S-pole magnet corresponding to the number of the first S-pole magnets; when the propeller is in the propeller position, the second N-pole magnet attracts the first S-pole magnet, and the second S-pole magnet attracts the first N-pole magnet.

7. The UAV rotor feathering mechanism according to claim 6, characterized in that, The fixed magnetic chuck is provided with multiple sets of first magnet mounting slots, and a set of first N pole magnets or a set of first S pole magnets can be detachably installed in a set of first magnet mounting slots. The moving magnetic chuck is provided with multiple sets of second magnet mounting slots, and a set of second N pole magnets or a set of second S pole magnets can be detachably installed in a set of second magnet mounting slots.

8. The UAV rotor feathering mechanism according to claim 7, characterized in that, The first N-pole magnet includes a plurality of first N-pole magnet units, the first S-pole magnet includes a plurality of first S-pole magnet units, and the first magnet mounting slot includes a plurality of first slot mounting positions, with one first slot mounting position corresponding to one first N-pole magnet unit or one first S-pole magnet unit.

9. The UAV rotor feathering mechanism according to claim 7, characterized in that, The second N-pole magnet includes a plurality of second N-pole magnet units, the second S-pole magnet includes a plurality of second S-pole magnet units, and the second magnet mounting slot includes a plurality of second slot mounting positions, one second slot mounting position corresponds to one second N-pole magnet unit or one second S-pole magnet unit, and the number of second slot mounting positions is greater than the number of second N-pole magnet units or second S-pole magnet units.

10. A drone, characterized in that, Includes the drone rotor feathering mechanism as described in any one of claims 1 to 9.

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