propellers and flight equipment

Abstract

This application relates to a propeller and a flight device. The propeller includes a central shaft, a hub, blades, a folding mechanism, and a clutch mechanism. The central shaft is adapted to be connected to the output shaft of a rotor motor. The hub is connected to the central shaft and can be driven to rotate by the central shaft. The blades are rotatably connected to the hub. The folding mechanism is connected between the hub and the blades to control the blades to unfold or retract relative to the hub. The clutch mechanism is connected between the hub and the blades and includes a drive member, a first clutch member, and a second clutch member. The first clutch member is connected to the drive member, and the second clutch member is connected to the folding mechanism. The first clutch member can engage or disengage with the second clutch member under the drive of the drive member. The above-mentioned propeller, through the design of a special clutch mechanism, introduces the power of the rotor motor into the folding mechanism, eliminating the need for a separate motor for the folding mechanism, simplifying the propeller structure, and reducing the propeller's manufacturing cost.

Description

Technical Field

[0001] This application relates to the field of transportation technology, and more specifically, to a propeller and a flight device. Background Technology

[0002] Medium and large rotorcraft have large blades, requiring significant storage space. As the takeoff weight of the aircraft increases, the blade size becomes even larger, necessitating even more storage space. Aircraft employing blade folding mechanisms can greatly reduce the space required for parking, transportation, and storage; therefore, blade folding has become an essential feature for aircraft.

[0003] In related technologies, the folding mechanism of the propeller blades usually requires a separate drive mechanism, which is complex and makes the propeller and the aircraft too heavy. Summary of the Invention

[0004] This application provides a propeller and a flight device.

[0005] According to a first aspect of this application, an embodiment provides a propeller including a central shaft, a hub, blades, a folding mechanism, and a clutch mechanism. The central shaft is adapted to be connected to the output shaft of a rotor motor. The hub is connected to the central shaft and can be driven to rotate by the central shaft. The blades are rotatably connected to the hub. The folding mechanism is connected between the hub and the blades to control the blades to unfold or retract relative to the hub. The clutch mechanism is connected between the hub and the blades and includes a drive member, a first clutch member, and a second clutch member. The first clutch member is connected to the drive member, and the second clutch member is connected to the folding mechanism. The first clutch member can engage or disengage with the second clutch member under the drive of the drive member. When the first clutch member and the second clutch member are engaged, the central shaft can drive the hub to rotate under the drive of the rotor motor, so that the folding mechanism drives the blades to rotate relative to the hub under the restriction of the second clutch member. When the first clutch member and the second clutch member are disengaged, the central shaft can drive the hub and blades to rotate around the axis of the central shaft under the drive of the rotor motor, thereby providing lift.

[0006] According to a second aspect of this application, an embodiment of this application provides a flight device, including an airframe and the aforementioned propeller, the propeller being mounted on the airframe.

[0007] In the propeller provided in this embodiment, the central shaft can drive the rotor hub to rotate under the drive of the rotor motor, thereby causing the folding mechanism to rotate around the axis of the central shaft. When the first clutch and the second clutch are engaged, the movement of the second clutch is restricted, so the folding mechanism and the second clutch move relative to each other, thereby causing the blades to rotate relative to the rotor hub. When the first clutch and the second clutch are disengaged, the movement of the second clutch is unrestricted. Therefore, the central shaft, the second clutch, and the folding mechanism rotate together around the axis of the central shaft, that is, the rotor hub and the blades rotate around the axis of the central shaft, and the rotor motor provides lift to the propeller.

[0008] The aforementioned propeller incorporates a special clutch mechanism to introduce the power of the rotor motor into the folding mechanism, eliminating the need for a separate motor. In other words, a single rotor motor can complete the folding of the blades and provide lift for the propeller, simplifying the propeller's structure and reducing its manufacturing cost. Attached Figure Description

[0009] To more clearly illustrate the technical solution 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 from these drawings without creative effort.

[0010] Figure 1 A three-dimensional structural schematic diagram of the flight equipment provided in the embodiments of this application is shown.

[0011] Figure 2 A partial three-dimensional structural diagram of a propeller in a folded state, according to an embodiment of this application, is shown.

[0012] Figure 3 It shows Figure 2 The diagram shows a partial cross-sectional view of the propeller.

[0013] Figure 4 It shows Figure 2 The diagram shows a partial three-dimensional structure of the propeller from another perspective.

[0014] Figure 5 It shows Figure 2 The diagram shows a partial three-dimensional structure of the propeller in its deployed state.

[0015] Figure 6 It shows Figure 5 The diagram shows a partial cross-sectional view of the propeller.

[0016] Figure 7 It shows Figure 5 The diagram shows a partial three-dimensional structure of the propeller from another perspective.

[0017] Figure 8 It shows Figure 2 The diagram shows a partial three-dimensional structure of the propeller from another perspective.

[0018] Figure 9 It shows Figure 8 A magnified view of a portion of region A of the propeller shown.

[0019] Figure 10 It shows Figure 2 The diagram shown is a partial three-dimensional structural schematic of the propeller, omitting the hub body.

[0020] Figure 11 It shows Figure 5 The diagram shown is a partial three-dimensional structural schematic of the propeller, omitting the hub body.

[0021] Figure 12 It shows Figure 11 The diagram shows a partial three-dimensional structure of the propeller's folding mechanism and clutch mechanism.

[0022] Figure 13 It shows Figure 3 The diagram shows a partially enlarged cross-sectional view of the propeller.

[0023] Figure 14 It shows Figure 6 The diagram shows a partially enlarged cross-sectional view of the propeller. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0025] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. The specification and claims do not distinguish components based on differences in name, but rather on differences in function. For example, the term "comprising" used throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to"; "generally" means that those skilled in the art can solve the technical problem and basically achieve the technical effect within a certain margin of error.

[0026] The test apparatus and vehicle proposed in this application will be further described below with reference to specific embodiments and accompanying drawings.

[0027] Please see Figure 1 This application provides a propeller 100 and a flight device 200 equipped with the propeller 100. The propeller 100 can be applied to the flight device 200 and can switch between an unfolded and a folded state. In this application embodiment, the propeller 100 can be, but is not limited to, a fixed-pitch propeller, a variable-pitch propeller, or other propellers.

[0028] The flight equipment 200 can be, but is not limited to, helicopters, flying cars, or other flying devices. The flight equipment 200 includes a fuselage 210, arms 230, and the aforementioned propeller 100. The fuselage 210, as the main body of the flight equipment 200, can be equipped with components such as a cabin for passengers. When the flight equipment 200 is a flying car, the fuselage 210 can also house a driving system (not shown in the figure). The driving system can include drive components such as drive wheels, clutches, transmissions, drive shafts, and transmission gears; steering components such as steering wheels, steering shafts, and steering gears; and speed control components such as accelerators, decelerators, engines, and brake pads.

[0029] Arm 230 is connected to fuselage 210 and can rotate relative to fuselage 210. Propeller 100 is connected to arm 230. Propeller 100 can be equipped with its own rotor motor, and the blades of propeller 100 can be driven by the rotor motor to provide lift; alternatively, propeller 100 can be without rotor motor, and flight equipment 200 can also include drive motor 250, which can drive the blades of propeller 100 to rotate through output shaft. Furthermore, by reducing the structure and weight of propeller 100, the overall flight equipment 200 is made simpler and more compact, achieving lightweighting. In this embodiment, there can be two arms 230, which are respectively connected to opposite sides of fuselage 210. Correspondingly, there are also two drive motors 250 and two propellers 100, with the two drive motors 250 respectively mounted on the two arms 230 and connected to the two propellers 100 respectively.

[0030] In this embodiment, the fuselage 210 may be provided with a receiving space 212, which is used to accommodate at least a portion of the structure of the flight equipment 200. When the propeller 100 is in a folded state, the two arms 230 are at least partially accommodated in the receiving space 212 to avoid the structure extending outward relative to the fuselage 210 from interfering with road travel, and to simplify the overall storage structure of the flight equipment 200.

[0031] Please see Figure 2 and Figure 3The propeller 100 includes a central shaft 10, a hub 30, blades 50, a folding mechanism 70, and a clutch mechanism 90. The central shaft 10 is adapted to connect to the output shaft of a rotor motor. In this embodiment, the rotor motor can be a drive motor 250, and the output shaft of the rotor motor can be the output shaft of the drive motor 250. The central shaft 10 can rotate under the drive of the rotor motor. The hub 30 is connected to the central shaft 10 and can be driven to rotate by the central shaft 10. The blades 50 are connected to the hub 30, and the folding mechanism 70 is connected between the hub 30 and the blades 50 to control the blades 50 to unfold or retract relative to the hub 30. A clutch mechanism 90 is connected between the rotor hub 30 and the rotor blade 50. The clutch mechanism 90 includes a drive member 92, a first clutch member 94, and a second clutch member 96. The first clutch member 94 is connected to the drive member 92, and the second clutch member 94 is connected to the folding mechanism 70. The first clutch member 94 can engage or disengage with the second clutch member 96 under the drive of the drive member 92. When the first clutch member 94 and the second clutch member 96 are engaged, the central shaft 10 can drive the rotor hub 30 to rotate under the drive of the rotor motor, so that the folding mechanism 50 drives the rotor blade 50 to rotate relative to the rotor hub 30 under the restriction of the second clutch member 96. When the first clutch member 94 and the second clutch member 96 are disengaged, the central shaft 10 can drive the rotor hub 30 and the rotor blade 50 to rotate around the axis of the central shaft 10 under the drive of the rotor motor, thereby providing lift.

[0032] The propeller 100, through the design of a special clutch mechanism, introduces the power of the rotor motor 22 into the folding mechanism 70, so that the folding mechanism 70 does not need a separate motor. That is, the rotor motor 22 can complete the folding of the blades 50 and provide lift for the propeller 100, simplifying the structure of the propeller 100 and reducing the manufacturing cost of the propeller 100.

[0033] In this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., 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; they can refer to the internal communication of two components or merely surface contact. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this embodiment, the central shaft 10 is a hollow structure. The central shaft 10 is provided with a central hole 12, a first end 14 and a second end 16. The first end 14 and the second end 16 are located at opposite ends of the central shaft 10. The central hole 12 passes through the first end 14 and the second end 16. The central hole 12 is used to accommodate the drive component 92 to reduce the volume of the propeller 100.

[0036] Furthermore, in this embodiment, the propeller 100 may also include a drive mechanism 20 connected to the central shaft 10. The drive mechanism 20 includes a rotor motor 22 and a housing 24. The rotor motor 22 is disposed within the housing 24, and the central shaft 10 passes through the housing 24 at least partially. Specifically, in this embodiment, the rotor motor 22 can serve as the aforementioned drive motor 250. The output shaft of the rotor motor 22 is connected to the central shaft 10 and drives the central shaft 10 to rotate. In some embodiments, the rotor motor 22 and the output shaft can be an assembled structure, for example, the output shaft is an independent rotating shaft (such as the central shaft 10), and the rotor motor 22 is sleeved on this rotating shaft. In other embodiments, the rotor motor 22 and the output shaft can be an integral structure.

[0037] Please see Figure 4 In this embodiment, the drive mechanism 20 further includes a sensor 26, which is disposed in the housing 24 and electrically connected to the rotor motor 22. The sensor 26 can detect the rotation progress (e.g., rotation angle and speed) of the blade 50 and send control signals to the rotor motor 22. Further, the sensor 26 can be a Hall sensor, which may include components such as Hall elements, Hall switch circuits, and Hall linear circuits. Based on the Hall effect, the Hall sensor obtains the position of the blade 50 relative to the hub 30 by detecting the change in the magnetic field between the blade 50 and the hub 30.

[0038] Please see Figure 5 and Figure 6 In this embodiment, the propeller hub 30 includes a propeller hub body 32 and a limiting part 34 connected to the propeller hub body 32. The propeller hub body 32 is connected to the central shaft 10, and there is a non-rotational connection between the propeller hub body 32 and the central shaft 10 (e.g., by key connection or screw connection), so that the propeller hub body 32 can rotate under the drive of the central shaft 10.

[0039] Specifically, in this embodiment, the rotor hub body 32 includes a first body portion 321, a second body portion 323, and a third body portion 325. The first body portion 321 and the second body portion 323 are substantially the same plate-like structure, and are arranged at intervals relative to each other. The first body portion 321 has a first opening 3211, which penetrates through the first body portion 321 and is located approximately in the middle of the first body portion 321. The second body portion 323 has a second opening 3231, which penetrates through the second body portion 323 and is located approximately in the middle of the second body portion 323.

[0040] The third body portion 325 is connected between the first body portion 321 and the second body portion 323. In this embodiment, the third body portion 325 is generally a hollow columnar structure. A receiving hole 3251 is provided on the side of the third body portion 325 away from the rotor motor 22. The receiving hole 3251 extends through the third body portion 3251 and communicates with the first opening 3211 and the second opening 3231. The receiving hole 3251 is used to accommodate part of the clutch mechanism 90, thereby reducing the volume of the flight equipment 200 and saving the space occupied by the flight equipment 200. In this embodiment, the first body portion 321, the second body portion 323, and the third body portion 325 can be an integrally formed structure or an assembled connection structure; this specification does not limit this.

[0041] The limiting part 34 is connected to the first body part 321 and is used to cooperate with the blade 50 to limit the position of the blade 50 in the deployed state, so as to prevent the blade 50 from wobbling relative to the hub 30. The limiting part 34 is at least partially spaced from the receiving hole 3251. Specifically, in this embodiment, the limiting part 34 includes a first limiting plate 341 and a second limiting plate 343. The first limiting plate 341 is spaced apart from the first body part 321 and is arranged substantially parallel to the first body part 321. The second limiting plate 343 is connected between the first limiting plate 341 and the first body part 321. The second limiting plate 343 is bent relative to the first limiting plate 341 to reduce the volume of the limiting part 34 and save space occupied by the propeller 100.

[0042] Please see Figures 7 to 9In this embodiment, the propeller hub 30 further includes a third limiting member 36, which limits the extreme position of the propeller blade 50 relative to the propeller hub 30 when deployed. The third limiting member 36 is disposed on the side of the limiting portion 34 facing the receiving hole 3251. Specifically, the third limiting member 36 is disposed on the side of the second limiting plate 343 facing the receiving hole 3251. When the propeller blade 50 is in the deployed state relative to the propeller hub 30, the third limiting member 36 abuts against the propeller blade 50 to stop the propeller blade 50 from rotating. Furthermore, since the third limiting member 36 is used as a consumable part, it is detachably connected to the limiting portion 34 for easy replacement after wear. The third limiting member 36 can be made of an elastic or plastic material, for example, it can be made of plastic, reducing the weight of the propeller hub 30 and manufacturing costs.

[0043] In this embodiment, the blade 50 is rotatably connected to the hub 30 via a pin 501 and can be unfolded or retracted relative to the hub 30 under the action of the folding mechanism 70. There are at least two blades 50, including a first blade 52 and a second blade 54, which are rotatably connected to opposite sides of the hub 30. Specifically, in this embodiment, the first blade 52 includes a first blade body 521, a first clamping member 523, and a second clamping member 525. The first clamping member 523 and the second clamping member 525 are respectively connected to the first blade body 521 and are spaced apart to form a first clamping space 527. At least one end of the hub body 32 near the first blade 52 is partially accommodated in the first clamping space 527. Specifically, the first clamping member 523 and the second clamping member 525 are movably connected to the hub body 32 (e.g., connected by a pin 501 or other rotating shafts). The first clamping space 527 is also used to accommodate part of the folding mechanism 70 so that the first blade 52 can be unfolded or retracted relative to the hub 30 under the drive of the folding mechanism 70.

[0044] In this embodiment, the length of the first clamping member 523 is greater than the length of the second clamping member 525. The first clamping member 523 is provided with a first locking part 5201 on the side away from the first blade body 521. The first locking part 5201 is used to cooperate with a part of the clutch mechanism 90 so that the first blade 52 is fixed relative to the blade hub 30.

[0045] Furthermore, the first blade 52 also includes a first pin 529. The first clamping member 523, the second clamping member 525, and the hub body 32 are all provided with through holes. The through holes of the first clamping member 523, the second clamping member 525, and the hub body 32 are approximately coaxial. The first pin 529 is sequentially inserted through the through holes, that is, the first pin 529 is sequentially inserted through the first clamping member 523, the hub body 52, and the second clamping member 525, so that the first blade 52 is rotatably connected to one side of the hub 30, and the first blade 52 can rotate relative to the hub 30 around the first pin 529.

[0046] In this embodiment, the first blade 52 further includes a first limiting member 526, which is disposed on the side of the first blade body 521 facing the folding direction. When the first blade body 521 is in a folded state relative to the hub 30, the first limiting member 526 abuts against the side of the hub body 32 facing the first blade body 521 to restrict the folding movement of the first blade body 521. When the first blade body 521 is in an unfolded state relative to the hub 30, the first blade body 521 abuts against the third limiting member 36 to restrict the unfolding movement of the first blade body 521. Furthermore, the first limiting member 526 is detachable, and the material used for the first limiting member 526 is weaker in strength and hardness than the material of the hub body 32, allowing the first limiting member 526 to be used as a consumable part, thereby reducing the weight of the first blade 52 and the manufacturing cost.

[0047] In this embodiment, the first blade 52 is also provided with a first positioning hole 528. The first positioning hole 528 is disposed on the side of the first clamping member 523 facing the first body part 321. The hub body 32 also includes a first positioning member 328. The first positioning member 328 is movably disposed on the side of the first body part 321 facing the first clamping member 523 and is correspondingly disposed with the first positioning hole 528. When the first blade 52 is in a folded state relative to the hub 30, the first positioning member 328 cooperates with the first positioning hole 328 to limit the position of the first blade 52 relative to the hub 30, so as to prevent the first blade 52 after folding from swinging in the unfolding direction when it is stored in the body 210.

[0048] Specifically, in this embodiment, the second blade 54 includes a second blade body 541, a third clamping member 543, and a fourth clamping member 545. The third clamping member 543 and the fourth clamping member 545 are respectively connected to the second blade body 541. The third clamping member 543 and the fourth clamping member 545 are arranged at intervals to form a second clamping space 547. At least one end of the hub body 32 near the second blade 54 is accommodated in the second clamping space 547. Specifically, the third clamping member 543 and the fourth clamping member 545 are movably connected to the hub body 32 (e.g., connected by a pin 501 or other rotating shafts). The second clamping space 547 is also used to accommodate part of the structure of the folding mechanism 70, so that the second blade 54 unfolds or retracts relative to the hub 30 under the drive of the folding mechanism 70.

[0049] In this embodiment, the length of the third clamping member 543 is greater than that of the fourth clamping member 545. The third clamping member 543 is provided with a second locking part 5401 on the side away from the second blade body 541. The second locking part 5401 is used to cooperate with a part of the clutch mechanism 90 so that the second blade 54 is fixed relative to the blade hub 30.

[0050] Furthermore, the second blade 54 also includes a second pin 549. The third clamping member 543, the fourth clamping member 545, and the hub body 32 are all provided with through holes. The through holes of the third clamping member 543, the fourth clamping member 545, and the hub body 32 are approximately coaxial. The second pin 549 is sequentially inserted through the above-mentioned through holes, that is, the second pin 549 is sequentially inserted through the third clamping member 543, the hub body 54, and the fourth clamping member 545, so that the second blade 54 is rotatably connected to one side of the hub 30, and the second blade 54 can rotate relative to the hub 30 around the second pin 549.

[0051] In this embodiment, the second blade 54 further includes a second limiting member 546, which is disposed on the side of the second blade body 541 facing the folding direction. When the second blade body 541 is in a folded state relative to the hub 30, the second limiting member 546 abuts against the side of the hub body 32 facing the second blade body 541 to restrict the folding movement of the second blade body 541. When the second blade 54 is in an unfolded state relative to the hub 30, the second blade body 541 abuts against the third limiting member 36 to restrict the unfolding movement of the second blade body 541. Furthermore, the second limiting member 546 is detachable, and the material used for the second limiting member 546 is weaker in strength and hardness than the material of the hub body 32, allowing the second limiting member 546 to be used as a consumable part, thereby reducing the weight of the second blade 54 and the manufacturing cost.

[0052] In this embodiment, the second blade 54 is further provided with a second positioning hole 548, which is located on the side of the third clamping member 543 facing the first body portion 321. The rotor hub body 32 also includes a second positioning member 329, which is movably located on the side of the first body portion 321 facing the third clamping member 543 and corresponds to the second positioning hole 548. When the second blade 54 is in a folded state relative to the rotor hub 30, the second positioning member 329 cooperates with the second positioning hole 548 to limit the position of the second blade 54 relative to the rotor hub 30, so as to prevent the second blade 54 from swinging in the unfolding direction when it is retracted into the body 210 after folding. The radial blocking force provided by the first positioning member 328 and the second positioning member 329 can resist the inertial force generated when the rotor hub 30 is adjusted, the inertial force generated when the arm 230 is retracted, and the wind load, etc., while the blocking force is less than the torque generated by the folding mechanism 70 during the unfolding process.

[0053] Please see Figures 10 to 12 In this embodiment, the folding mechanism 70 includes a driven member 72 and a flexible traction member 74. The driven member 72 is connected to the blade 50, and the flexible traction member 74 is connected between the second clutch member 96 and the driven member 72. When the blade 50 rotates relative to the hub 30, the flexible traction member 74 can be released or wound between the second clutch member 96 and the driven member 72. In this embodiment, the material of the flexible traction member 74 is not limited; for example, the flexible traction member 74 can be a flexible component such as steel wire, nylon rope, round belt, or chain. Specifically, in this embodiment, the driven member 72 is sleeved on the pin 501 and can rotate around the pin 501. The number of driven members 72 is at least two, including a first driven member 721 and a second driven member 723. The first driven member 721 and the second driven member 723 are respectively disposed on opposite sides of the second clutch member 96. The first driven member 721 is disposed between the first body part 321 and the second body part 323 and accommodated in the first clamping space 527. The first driven member 721 is sleeved on the first pin 529 and can rotate around the first pin 529. The first driven member 721 is connected between the first clamping member 523 and the second clamping member 525 through the first pin 529, and the first driven member 721 is relatively fixedly connected to the first blade body 521 so as to drive the first blade body 521 to rotate relative to the blade hub 10. The second follower 723 is disposed between the first body part 321 and the second body part 323 and accommodated in the second clamping space 547. The second follower 723 is sleeved on the second pin 549 and can rotate around the second pin 549. The second follower 741 is connected between the third clamping member 543 and the fourth clamping member 545 through the second pin 549. The second follower 723 is relatively fixedly connected to the second blade body 541 so as to drive the second blade body 541 to rotate relative to the blade hub 10.

[0054] The two ends of the flexible traction member 74 are respectively connected to both sides of the second clutch member 96 and are wrapped around the side of the driven member 72 away from the second clutch member 96. There are at least two flexible traction members 74, including a first flexible traction member 741 and a second flexible traction member 743. The two ends of the first flexible traction member 741 are respectively connected to both sides of the second clutch member 96 and are wrapped around the side of the first driven member 721 away from the second clutch member 96. The first flexible traction member 741 drives the first blade 52 to unfold or retract relative to the hub 30 by winding or releasing. Further, the outer peripheral wall of the first driven member 721 is provided with a second groove 7211, which extends circumferentially along the first driven member 721. The first flexible traction member 741 is at least partially embedded in the first groove 7211, and can be wound or released along the extending direction of the first groove 7211. The two ends of the second flexible traction member 743 are respectively connected to the two sides of the second clutch member 96 and are wrapped around the side of the second driven member 723 away from the second clutch member 96. The second flexible traction member 743 drives the second blade 54 to unfold or retract relative to the hub 30 by winding or releasing. Further, the outer peripheral wall of the second driven member 723 is provided with a third groove 7231, which extends circumferentially along the second driven member 723. The second flexible traction member 743 is at least partially embedded in the third groove 7231, and the second flexible traction member 743 can be wound or released along the extending direction of the third groove 7231.

[0055] The first flexible traction member 741 includes a first connecting portion 7411 and a second connecting portion 7413. One end of the first connecting portion 7411 is disposed on the first side 9601 of the second clutch member 96 and the other end is disposed on the first side 7213 of the first driven member 721. One end of the second connecting portion 7413 is disposed on the second side 9603 of the second clutch member 96 and the other end is disposed on the second side 7213 of the first driven member 721. When the first clutch 94 and the second clutch 96 are engaged, the rotation of the second clutch 96 is restricted. The first driven member 721 rotates around the axis of the central shaft 10 under the drive of the first pin 529. Since the two ends of the first connecting part 7411 are relatively fixed on the first driven member 721 and the second clutch 96, and the two ends of the second connecting part 7413 are also relatively fixed on the first driven member 721 and the second clutch 96, during the rotation of the first driven member 721, the first connecting part 7411 is released and the second connecting part 7413 is wound, or the first connecting part 7411 is wound and the second connecting part 7413 is released, so as to drive the first blade 52 to rotate relative to the hub 30, so that the first blade 52 unfolds or retracts relative to the hub 30.

[0056] In some embodiments, the first connecting portion 7411 and the second connecting portion 7413 may be a continuous strip. The first connecting portion 7411 being fixed relative to the first follower 721 can be considered as the end of the first connecting portion 7411 located on the first follower 721 being connected to the second connecting portion 7413. Both of them together bypass the first follower 721, thereby realizing the connection between the first connecting portion 7411 and the first follower 721. Similarly, the second connecting portion 7413 being fixed relative to the first follower 721 can be considered as the end of the second connecting portion 7413 located on the first follower 721 being connected to the first connecting portion 7411. Both of them together bypass the first follower 721, thereby realizing the connection between the second connecting portion 7413 and the first follower 721. In other embodiments, the first connecting portion 7411 and the second connecting portion 7413 can be two independent parts. The first connecting portion 7411 is fixed to the end of the first driven member 721 and the second connecting portion 7413 is fixed to the end of the first driven member 721 independently. The term "relatively fixed" means that the two ends of the first connecting portion 7411 are fixed to the corresponding parts by physical connection, and the two ends of the second connecting portion 7413 are fixed to the corresponding parts by physical connection.

[0057] The second flexible traction member 743 includes a third connecting portion 7431 and a fourth connecting portion 7433. One end of the third connecting portion 7431 is disposed on the first side 9601 of the second clutch member 96 and the other end is disposed on the first side 7233 of the second driven member 723. One end of the fourth connecting portion 7433 is disposed on the second side 9603 of the second clutch member 96 and the other end is disposed on the second side 7235 of the second driven member 723. When the second clutch 94 and the second clutch 96 are engaged, the rotation of the second clutch 96 is restricted. The second driven member 723 rotates around the axis of the central shaft 10 under the drive of the second pin 549. Since the two ends of the third connecting part 7431 are relatively fixed on the second driven member 723 and the second clutch 96, and the two ends of the fourth connecting part 7433 are also relatively fixed on the second driven member 723 and the second clutch 96, during the rotation of the second driven member 723, the third connecting part 7431 is released and the fourth connecting part 7433 is wound, or the third connecting part 7431 is wound and the fourth connecting part 7433 is released, so as to drive the second blade 54 to rotate relative to the hub 30, so that the second blade 54 unfolds or retracts relative to the hub 30.

[0058] In some embodiments, the third connecting portion 7431 and the fourth connecting portion 7433 may be a continuous strip. The third connecting portion 7431 being fixed relative to the second follower 723 can be considered as the end of the third connecting portion 7431 located on the second follower 723 being connected to the fourth connecting portion 7433. Both of them bypass the second follower 723, thereby realizing the connection between the third connecting portion 7431 and the second follower 723. Similarly, the fourth connecting portion 7433 being fixed relative to the second follower 723 can be considered as the end of the fourth connecting portion 7433 located on the second follower 723 being connected to the third connecting portion 7431. Both of them bypass the second follower 723, thereby realizing the connection between the fourth connecting portion 7433 and the second follower 723. In other embodiments, the third connecting portion 7431 and the fourth connecting portion 7433 can be two independent parts. The third connecting portion 7431 is fixed to the end of the second driven member 723 and the fourth connecting portion 7433 is fixed to the end of the second driven member 723 independently. The term "relatively fixed" means that the two ends of the third connecting portion 7431 are fixed to the corresponding parts by physical connection, and the two ends of the fourth connecting portion 7433 are fixed to the corresponding parts by physical connection.

[0059] In this embodiment, the first connecting portion 7411 and the second connecting portion 7413 are arranged side by side with intervals, for example, they are approximately parallel. The third connecting portion 7431 and the fourth connecting portion 7433 are arranged intersectingly (this does not mean that there must be a physical point of contact, but that their extension paths intersect; for example, the line containing the third connecting portion 7431 and the line containing the fourth connecting portion 7433 are skewed), to ensure that the first blade 52 and the second blade 54 fold or unfold in the same direction. It should be understood that in some other embodiments, the first connecting portion 7411 and the second connecting portion 7413 may be arranged intersectingly, and the third connecting portion 7431 and the fourth connecting portion 7433 may be arranged parallel to each other.

[0060] In this embodiment, the assembly form of the flexible traction member 74 is not limited. For example, in some embodiments, the first flexible traction member 741 and the second flexible traction member 743 can be an integral structure. In other embodiments, the first flexible traction member 741 and the second flexible traction member 743 can be two independent structures. For another example, in some embodiments, the first connecting portion 7411 and the second connecting portion 7413 can be an integral structure, and the third connecting portion 7431 and the fourth connecting portion 7433 can be an integral structure. In other embodiments, the first connecting portion 7411 and the second connecting portion 7413 can be two independent structures, and the third connecting portion 7431 and the fourth connecting portion 7433 can be two independent structures.

[0061] In summary, in this embodiment, the central shaft 10 can drive the rotor hub 30 to rotate under the drive of the rotor motor 22, thereby driving the first pin 529 and the second pin 549 to rotate around the axis of the central shaft 10. Therefore, the first follower 721 and the second follower 723 also rotate around the axis of the central shaft 10. When the first clutch 94 and the second clutch 96 are engaged, the movement of the second clutch 96 is restricted. Since the two ends of the first flexible traction member 741 are fixed on the first driven member 721 and the second clutch 96, and the two ends of the second flexible traction member 743 are fixed on the second driven member 723 and the second clutch 96, during the rotation of the first driven member 721 and the second driven member 723, the first flexible traction member 741 and the second flexible traction member 743 will be wound or released, thereby driving the blade 50 to rotate relative to the hub 30. When the first clutch 94 and the second clutch 96 are disengaged, the movement of the second clutch 96 is unrestricted. Therefore, the central shaft 10, the second clutch 96, the first driven member 721 and the second driven member 723 rotate together around the axis of the central shaft 10, that is, the hub 30 and the blade 50 rotate around the axis of the central shaft 10, and the rotor motor 22 provides lift to the propeller 100.

[0062] The aforementioned propeller 100, through a special clutch mechanism design, introduces the power of the rotor motor 22 into the folding mechanism 70. This eliminates the need for a separate motor in the folding mechanism 70; a single rotor motor 22 can complete the folding of the blades 50 and provide lift for the propeller 100, simplifying the structure of the propeller 100 and reducing its manufacturing cost. Furthermore, the use of a flexible traction member 74 in the transmission scheme avoids damage to the rotor hub 30 from the moving parts. The blades 50 can complete the folding action solely through the flexible traction member 74, saving space and weight compared to traditional linkages and gears, allowing for a more compact layout of the propeller 100. Moreover, the power of the folding mechanism 70 comes from the rotor motor 22, eliminating the need for separate actuators and slip rings with wiring, significantly reducing the weight and cost of the folding mechanism 70.

[0063] Please see Figure 13 and Figure 14 The drive element 92 is disposed within the central hole 12 and is exposed via the first end 14 and fixedly connected to the housing 24 (e.g., Figure 3As shown in the diagram, this design prevents the drive component 92 from rotating due to the rotation of the central shaft 10. Therefore, a slip ring structure is not required for power transmission, reducing component wear and simplifying inspection and maintenance. The clutch mechanism 90 also exhibits good reliability. Specifically, in this embodiment, the drive component 92 includes a fixed part 921 and a drive part 923. The fixed part 921 is fixedly disposed within the central hole 12 and fixedly connected to the housing 24, preventing it from rotating due to the rotation of the central shaft 10. The drive part 923 is slidably nested with the fixed part 921 and provides a non-rotating connection relative to the fixed part 921. In this embodiment, the drive component 92 can be an electric actuator. A motor is disposed within the drive component 92, connected between the fixed part 921 and the drive part 923. The drive part 923 can move relative to the fixed part 921 along the axial direction of the central shaft 12 under the drive of the motor. In other embodiments, the drive component 92 can be a rotary motor, linear motor, cylinder, hydraulic cylinder, or other drive device.

[0064] The first clutch 94 is disposed at the part of the driving member 92 near the second end 16. Specifically, in this embodiment, the first clutch 94 is disposed on the side of the driving part 923 facing the central axis 10. The first clutch 94 can engage or disengage with the second clutch 96 under the drive of the driving part 923. Further, the first clutch 94 and the driving member 92 can be integrally formed or assembled. The specific structure of the first clutch 94 in this application is not limited. The first clutch 94 can be a meshing tooth, a flange, or a key connection structure. It can be integrally formed at the end of the driving member 92 and protrude relative to the driving member 92 along the radial direction of the driving member 92, thereby engaging with the second clutch 96 and restricting the rotational movement of the second clutch 96 in the circumferential direction, but not restricting the rotational movement of the second clutch 96 in the axial direction.

[0065] The second clutch element 96 is rotatably sleeved on the end of the central shaft 10, and the outer peripheral wall of the second clutch element 96 is provided with a first groove 961 (e.g., Figure 12 As shown, a first groove 961 extends circumferentially along the second clutch member 96. A first flexible traction member 741 is at least partially embedded in the first groove 961 and is capable of being wound or released along the extending direction of the first groove 961. A second flexible traction member 743 is at least partially embedded in the first groove 961 and is capable of being wound or released along the extending direction of the first groove 961.

[0066] Specifically, in this embodiment, the second clutch member 96 includes an outer sleeve 963, an inner sleeve 965, and a clutch portion 967. The outer sleeve 963 is disposed outside the second end 16 of the central shaft 10, and the first groove 961 is disposed on the side of the outer sleeve 963 opposite to the inner sleeve 965. In this embodiment, the end of the first connecting portion 7411 away from the first driven member 721 is relatively fixedly disposed on one side of the outer sleeve 963, the end of the second connecting portion 7413 away from the first driven member 721 is relatively fixedly disposed on the other side of the outer sleeve 963, the end of the third connecting portion 7431 away from the second driven member 723 is relatively fixedly disposed on one side of the outer sleeve 963, and the end of the fourth connecting portion 7433 away from the second driven member 723 is relatively fixedly disposed on the other side of the outer sleeve 963.

[0067] The inner sleeve 965 is connected to the outer sleeve 963 and disposed within the central hole 12. Both the outer sleeve 963 and the inner sleeve 965 can be generally cylindrical, so the outer sleeve 963 can be fitted over the inner sleeve 965, and the outer sleeve 963 and the inner sleeve 965 have a certain degree of rotational freedom.

[0068] The clutch portion 967 is connected to the inner sleeve portion 965 and is used to engage or disengage with the second clutch member 94. Further, the clutch portion 967 can be engaged with the first clutch member 94 via a key connection to prevent rotation. Specifically, in this embodiment, the clutch portion 967 is formed on the inner wall of the cylindrical structure of the inner sleeve portion 965. The clutch portion 967 is used to engage or nest with the first clutch member 94 to form a circumferential holding effect, thereby achieving a non-rotational connection with the first clutch member 94. Further, the specific structure of the clutch portion 967 in this embodiment is not limited. The clutch portion 967 can be a meshing tooth, a flange, or a key connection structure, which can be integrally formed on the inner wall of the cylindrical structure of the inner sleeve portion 965, thereby engaging with the first clutch member 94.

[0069] It should be understood that in other embodiments of this application, the connection method between the second clutch 94 and the first clutch 94 is not limited. In some other embodiments, the second clutch 94 and the first clutch 94 can be connected by an electromagnetic clutch. When energized, the second clutch 94 and the first clutch 94 are engaged, and when de-energized, the second clutch 94 and the first clutch 94 are disengaged.

[0070] In this embodiment, the clutch mechanism 90 further includes a locking member 98. Both the locking member 98 and the driving member 92 pass through the receiving hole 3251, making the structure of the clutch mechanism 90 more compact. The locking member 98 is connected to the driving member 92 and can move along the axial direction of the central shaft 10 under the drive of the driving member 92. The locking member 92 can move relative to the hub 30 under the drive of the driving member 92 to engage or disengage with the first locking part 5201 and / or the second locking part 5401. Furthermore, when the first locking part 5201 is disengaged from the locking member 98, the first blade 52 can rotate relative to the hub 30. When the second locking part 5401 is disengaged from the locking member 98, the second blade 54 can rotate relative to the hub 30. When the first locking part 5201 and the second locking part 5401 are engaged with the locking member 98, i.e., when the first blade 52 and the second blade 54 are in the deployed state, the locking member 98 is sequentially inserted through the first locking part 5201, the second locking part 5401, and the limiting part 34 to fix the position of the first blade 52 and the second blade 54 relative to the hub 30. Furthermore, in this embodiment, the axis of the first pin 529, the axis of the second pin 549, and the axis of the central shaft 10 are coplanar, ensuring that even when the locking member 98 fails, the blade 50 can still be in the deployed position under centrifugal force, so that the flight equipment 200 still has lift and can make an emergency landing.

[0071] In this embodiment, the clutch mechanism 90 also includes a bearing 99, and the locking member 98 is rotatably connected to the driving member 92 through the bearing 99, so that the degrees of freedom of the rotation direction of the locking member 98 and the driving member 92 do not restrict each other, thereby improving the flexibility of the clutch mechanism 90.

[0072] In summary, in this embodiment, the first blade 52 and the second blade 54 share a locking element 98, which reduces the number of locking elements 98 and reduces the cost and weight of the propeller 100 to a certain extent.

[0073] When the blade 50 is in the deployed state, the first locking part 5201 and the second locking part 5401 are engaged with the locking member 98. When the blade 50 needs to be folded relative to the hub 30, the driving part 923 of the driving member 92 moves downward relative to the fixed part 921, and the locking member 98 disengages from the limiting part 34, the first locking part 5201, and the second locking part 5401. At this time, the first blade 52 and the second blade 54 are in the unlocked state. At the same time, the first clutch member 94 is engaged with the clutch part 967, and the movement of the second clutch member 96 is restricted. Meanwhile, the rotor motor 22 drives the central shaft 10 to rotate. At this time, except for the driving member 92 and the second clutch member 96, all other components rotate (revolve) with the central shaft 10. Specifically, because the movement of the second clutch 96 is restricted, the rotor motor 22 rotates, and the central shaft 10 drives the rotor hub 30 to rotate clockwise. Since the first pin 529 is connected to the rotor hub 30, the first pin 529 also rotates clockwise (revolves) around the axis of the central shaft 10. As can be seen from the connection relationship described above, the first driven member 721 also rotates clockwise (revolves) around the axis of the central shaft 10. Because both ends of the first connecting part 7411 are fixed to the first driven member 721 and the second clutch 96, and both ends of the second connecting part 7413 are also fixed to the first driven member 721 and the second clutch 96, the first driven member... As the moving part 721 revolves, the first connecting part 7411 wraps around the first groove 961 on the second clutch 96. Simultaneously, a section of the second connecting part 7413, which was pre-wound onto the second groove 7211 on the first driven part 721, is released from the first driven part 721. Under the drag force of the first flexible traction member 741, the first driven part 721 rotates counterclockwise around the first pin 529. The final effect is that while the propeller hub 30 rotates clockwise relative to the ground, the first driven part 721 rotates counterclockwise relative to the propeller hub 30, and the first blade 52 folds counterclockwise relative to the propeller hub 30. The folding process of the second blade 54 is similar.

[0074] The motion process when the blade 50 unfolds relative to the hub 30 is the reverse of the folding process described above.

[0075] In the propeller provided in this embodiment, the central shaft can drive the rotor hub to rotate under the drive of the rotor motor, thereby causing the folding mechanism to rotate around the axis of the central shaft. When the first clutch and the second clutch are engaged, the movement of the second clutch is restricted, so the folding mechanism and the second clutch move relative to each other, thereby causing the blades to rotate relative to the rotor hub. When the first clutch and the second clutch are disengaged, the movement of the second clutch is unrestricted. Therefore, the central shaft, the second clutch, and the folding mechanism rotate together around the axis of the central shaft, that is, the rotor hub and the blades rotate around the axis of the central shaft, and the rotor motor provides lift to the propeller.

[0076] The aforementioned propeller incorporates a special clutch mechanism to introduce the power of the rotor motor into the folding mechanism, eliminating the need for a separate motor. In other words, a single rotor motor can complete the folding of the blades and provide lift for the propeller, simplifying the propeller's structure and reducing its manufacturing cost.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A propeller, characterized in that, include: A central shaft, adapted to be connected to the output shaft of a rotor motor, the central shaft having a central hole that passes through a first end and a second end of the central shaft that are disposed opposite to each other; The hub is connected to the central shaft and can be driven to rotate by the central shaft; The blades are rotatably connected to the hub via pins; A folding mechanism is connected between the propeller hub and the propeller blade to control the propeller blade to unfold or retract relative to the propeller hub. The folding mechanism includes a follower and a flexible traction member. The follower is sleeved on the pin and connected to the propeller blade through the pin. A clutch mechanism is connected between the propeller hub and the propeller blade. The clutch mechanism includes a driving member, a first clutch member, and a second clutch member. The driving member is disposed in the central hole. The first clutch member is connected to the driving member and disposed at a position of the driving member near the second end. The second clutch member is connected to the folding mechanism. The first clutch member can engage or disengage with the second clutch member under the drive of the driving member. The second clutch is disposed at one end of the central shaft. The flexible traction member is connected between the second clutch and the driven member. The two ends of the flexible traction member are respectively connected to the two sides of the second clutch and are wrapped around the driven member on the side away from the second clutch. The second clutch includes an outer sleeve, an inner sleeve, and a clutch part. The outer sleeve is sleeved outside the second end. The inner sleeve is connected to the outer sleeve and disposed in the central hole. The clutch part is connected to the inner sleeve and is used to connect with the first clutch by a key so that the first clutch and the second clutch are engaged to prevent rotation. When the first clutch and the second clutch are engaged, the central shaft can drive the rotor hub to rotate under the drive of the rotor motor, so that the folding mechanism drives the blades to rotate relative to the rotor hub under the restriction of the second clutch; when the blades rotate relative to the rotor hub, the flexible traction member is released or wound between the second clutch and the driven member; when the first clutch and the second clutch are disengaged, the central shaft can drive the rotor hub and the blades to rotate around the axis of the central shaft under the drive of the rotor motor, thereby providing lift.

2. The propeller as claimed in claim 1, characterized in that, The propeller also includes a rotor motor and a housing. The rotor motor is disposed inside the housing, the output shaft of the rotor motor is connected to the central shaft, and the drive component is fixedly connected to the housing.

3. The propeller as described in claim 2, characterized in that, The central shaft passes through the housing at least partially, and the drive member is fixedly connected to the housing by being exposed at the first end of the central hole.

4. The propeller as described in claim 3, characterized in that, The driving component includes a fixing part and a driving part. The fixing part is disposed in the central hole and fixedly connected to the housing. The driving part is slidably nested with the fixing part and is anti-rotationally connected relative to the fixing part. The first clutch is connected to the driving part.

5. The propeller as claimed in claim 1, characterized in that, The number of blades is at least two, and the at least two blades include a first blade and a second blade. The first blade is rotatably connected to one side of the hub via a first pin, and the second blade is rotatably connected to the other side of the hub via a second pin. The number of driven members is at least two, and the at least two driven members include a first driven member and a second driven member. The first driven member and the second driven member are respectively disposed on both sides of the second clutch member. The first driven member is sleeved on the first pin, and the second driven member is sleeved on the second pin. The number of flexible traction components is at least two, and the at least two flexible traction components include a first flexible traction component and a second flexible traction component. The two ends of the first flexible traction component are respectively connected to both sides of the second clutch component and are wrapped around the side of the first driven component away from the second clutch component. The two ends of the second flexible traction component are respectively connected to both sides of the second clutch component and are wrapped around the side of the second driven component away from the second clutch component.

6. The propeller as claimed in claim 5, characterized in that, The first flexible traction member includes a first connecting portion and a second connecting portion. One end of the first connecting portion is disposed on a first side of the second clutch member and the other end is disposed on a first side of the first driven member. One end of the second connecting portion is disposed on a second side of the second clutch member and the other end is disposed on a second side of the first driven member. The first connecting portion and the second connecting portion are arranged side by side with a gap between them; or / and The second flexible traction member includes a third connecting part and a fourth connecting part. One end of the third connecting part is disposed on the first side of the second clutch member and the other end is disposed on the second side of the second driven member. One end of the fourth connecting part is disposed on the second side of the second clutch member and the other end is disposed on the first side of the second driven member. The third connecting part and the fourth connecting part are arranged crosswise.

7. The propeller as claimed in claim 5, characterized in that, The second clutch is rotatably sleeved on the end of the central shaft. The outer peripheral wall of the second clutch is provided with a first groove, which extends along the circumferential direction of the second clutch. The first flexible traction member is at least partially embedded in the first groove, and the second flexible traction member is at least partially embedded in the first groove. The outer peripheral wall of the first driven member is provided with a second groove, which extends along the circumferential direction of the first driven member; the first flexible traction member is at least partially embedded in the second groove; The outer peripheral wall of the second driven member is provided with a third groove, which extends along the circumference of the second driven member; the second flexible traction member is at least partially embedded in the third groove.

8. The propeller as claimed in claim 5, characterized in that, The axis of the first pin, the axis of the second pin, and the axis of the central shaft are coplanar.

9. The propeller as described in any one of claims 1 to 8, characterized in that, The clutch mechanism further includes a locking member connected to the drive member. There are two blades, including a first blade and a second blade. The first blade and the second blade are rotatably connected to the hub. The first blade is provided with a first locking part, and the second blade is provided with a second locking part. The locking member moves relative to the hub under the drive of the drive member to engage or disengage from the first locking part and / or the second locking part.

10. The propeller as claimed in claim 9, characterized in that, The propeller hub includes a propeller hub body, a first positioning member, and a second positioning member. The propeller hub body is connected to the central shaft. The first positioning member is movably disposed on the propeller hub body, and the second positioning member is movably disposed on the propeller hub body. The first blade is rotatably connected to the hub body and has a first positioning hole. The first positioning member cooperates with the first positioning hole to limit the position of the first blade relative to the hub. The second blade is rotatably connected to the hub body and has a second positioning hole. The second positioning member cooperates with the second positioning hole to limit the position of the second blade relative to the hub.

11. The propeller as claimed in claim 9, characterized in that, The propeller hub includes a hub body and a limiting portion connected to the hub body. The hub body has a receiving hole, and the locking member and the driving member pass through the receiving hole. The limiting portion is at least partially spaced from the receiving hole. When the first blade and the second blade are in the deployed state, the first locking portion and the second locking portion are located between the limiting portion and the receiving hole, and the locking member passes through the first locking portion, the second locking portion and the limiting portion.

12. The propeller as claimed in claim 11, characterized in that, The first blade is provided with a first limiting member, which is disposed on the side of the first blade facing the folding direction. When the first blade is in a folded state relative to the blade hub, the first limiting member abuts against the blade hub body; and / or The second blade is provided with a second limiting member, which is disposed on the side of the second blade facing the folding direction. When the second blade is in a folded state relative to the blade hub, the second limiting member abuts against the blade hub body; and / or The propeller hub also includes a third limiting member, which is disposed on the side of the limiting portion facing the receiving hole. When the first blade is in the unfolded state relative to the propeller hub, the third limiting member abuts against the first blade. When the second blade is in the unfolded state relative to the propeller hub, the third limiting member abuts against the second blade.

13. The propeller as claimed in claim 9, characterized in that, The central shaft is a hollow structure, and the driving component is disposed inside the central shaft; the clutch mechanism also includes a bearing, and the locking component is rotatably connected to the driving component through the bearing.

14. A flight device, characterized in that, include: Organism; as well as The propeller according to any one of claims 1-13, wherein the propeller is mounted on the body.

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