CN117508573A - Propeller and flying equipment - Google Patents

Abstract

The present application relates to a propeller and a flying apparatus. The propeller comprises a propeller hub, a propeller blade device and a folding device, wherein the propeller blade comprises a first propeller blade assembly and a second propeller blade assembly, the first propeller blade assembly and the second propeller blade assembly are respectively and rotatably connected to the propeller hub, the folding device is arranged on the propeller hub and connected between the first propeller blade assembly and the second propeller blade assembly so as to control the propeller blade to be unfolded or folded relative to the propeller hub, the folding device comprises a mounting seat, a folding driving mechanism, a first folding driving mechanism and a second folding driving mechanism, the mounting seat is fixedly arranged on the propeller hub, the folding driving mechanism is slidably arranged on the mounting seat, the first folding driving mechanism is connected between the folding driving mechanism and the first propeller blade assembly, and the second folding driving mechanism is connected between the folding driving mechanism and the second propeller blade assembly. The folding device of the propeller can simplify the structure of the folding device by driving the two blade assemblies to rotate simultaneously, so that the quality and the production cost of the propeller are reduced.

Description

Propeller and flying equipment

Technical Field

The present application relates to the technical field of vehicles, and more particularly, to a propeller and a flight apparatus.

Background

The blades of medium and large-sized rotorcraft are large in size and require a large storage space. As the takeoff weight of an aircraft increases, the size of the blades becomes larger and the required storage space becomes larger. The space occupied by the aircraft with the blade folding mechanism during parking, transportation and warehousing can be greatly reduced, so that the blade folding becomes a necessary function of the aircraft.

In the related art, manual folding, hydraulic automatic folding and other modes are generally adopted to realize folding and unfolding of each blade, and a driving mechanism with a large volume is needed, so that the weight of the propeller and the aircraft is overlarge.

Disclosure of Invention

The embodiment of the application provides a propeller and flight equipment.

According to a first aspect of the present application, the embodiment provides a propeller, including the oar hub, the paddle device and folding device, the paddle includes first paddle subassembly and second paddle subassembly, first paddle subassembly and second paddle subassembly rotationally connect respectively in the oar hub, folding device sets up in the oar hub and connects between first paddle subassembly and second paddle subassembly, in order to control the paddle to expand or draw in for the oar hub, folding device includes the mount pad, folding actuating mechanism, first folding actuating mechanism and second folding actuating mechanism, the mount pad is fixedly set up in the oar hub, folding actuating mechanism slidably sets up in the mount pad, first folding actuating mechanism connects between folding actuating mechanism and first paddle subassembly, and be used for driving first paddle subassembly to expand or draw in for the oar hub under folding actuating mechanism's drive, second folding actuating mechanism connects between folding actuating mechanism and second paddle subassembly, and be used for driving second paddle subassembly to expand or draw in for the oar hub under folding actuating mechanism's drive.

According to a second aspect of the present application, an embodiment of the present application provides a flying apparatus, including a body and the propeller described above, the propeller being mounted to the body.

In the propeller provided by the embodiment of the application, the first blade assembly and the second blade assembly are respectively rotatably connected to the hub so as to be unfolded or folded relative to the hub. The folding driving mechanism is arranged on the mounting seat and can slide relative to the mounting seat, the first folding driving mechanism is connected between the folding driving mechanism and the first blade assembly, the second folding driving mechanism is connected between the folding driving mechanism and the second blade assembly, and the folding driving mechanism can simultaneously drive the first folding driving mechanism and the second folding driving mechanism to rotate, so that the first blade assembly and the second blade assembly are simultaneously driven to unfold or fold relative to the hub.

According to the folding device of the propeller, the first folding transmission mechanism and the second folding transmission mechanism are driven to simultaneously drive the two blade assemblies to rotate through the folding driving mechanism, so that the structure of the folding device can be simplified, the quality and the volume of the folding device are reduced, and the quality and the production cost of the propeller are reduced. Further, the folding driving mechanism slides relative to the mounting seat, so that interference caused by movement of the first folding driving mechanism and the second folding driving mechanism can be avoided when the first folding driving mechanism and the second folding driving mechanism are driven, and flexibility of the folding device is improved.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic perspective view of a flight device according to an embodiment of the present application.

Fig. 2 shows a schematic partial perspective view of a propeller provided in an embodiment of the present application in a folded state.

Fig. 3 shows a schematic perspective view of the propeller of fig. 2 in an unfolded state.

Fig. 4 shows a schematic perspective view of the blade arrangement of the propeller of fig. 2.

Fig. 5 shows a schematic structural view of the folding device of the propeller shown in fig. 2.

Fig. 6 shows a schematic perspective view of the propeller of fig. 2.

Fig. 7 shows a schematic view of another perspective view of the propeller of fig. 6.

Fig. 8 shows a schematic view of a partial perspective view of the hub and locking mechanism of the propeller of fig. 6.

Fig. 9 shows a schematic perspective view of the propeller of fig. 6 from another perspective.

Fig. 10 shows a schematic view of a partial perspective view of the hub and the stop mechanism of the propeller of fig. 9.

Detailed Description

In order to enable those skilled in the art to better understand the present application, the following description will make clear and complete descriptions of the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

As a particular component is referred to by some of the terms used in the description and claims, it should be understood by those skilled in the art that a hardware manufacturer may refer to the same component by different terms. The description and claims do not take the difference in name as a way of distinguishing between components, but rather take the difference in functionality of the components as a criterion for distinguishing. As used throughout the specification and claims, the word "comprise" and "comprises" are to be construed as "including, but not limited to"; by "substantially" is meant that a person skilled in the art can solve the technical problem within a certain error range, essentially achieving the technical effect.

The propeller and the flying device proposed in the present application will be further elucidated with reference to the detailed description and the accompanying drawings.

Referring to fig. 1, the embodiment of the present application provides a propeller 100 and a flying apparatus 200 provided with the propeller 100, and the propeller 100 may be applied to the flying apparatus 200, which is capable of being switched between an unfolded state and a folded state. In the present embodiment, the propeller 100 may be, but is not limited to, a fixed pitch propeller, a variable pitch propeller, or the like.

The flying device 200 may be, but is not limited to, a helicopter, a flying car, or the like. The flying apparatus 200 includes the body 210, the horn 230, the driving motor 250, and the propeller 100 described above. The body 210, which is a main body portion of the flying apparatus 200, may be provided with a cabin or the like for riding by a driver and passengers. When the flying device 200 is a flying car, a running system (not shown in the figure) may be further disposed in the machine body 210, where the running system may include driving components such as driving wheels, clutches, speed changing devices, transmission shafts, transmission gears, steering components such as steering wheels, steering shafts, steering gears, and speed control components such as accelerators, reducers, engines, brake pads, and the like.

The arm 230 is connected to the body 210, the driving motor 250 is connected between the arm 230 and the propeller 100, and the driving motor 250 can drive the propeller 100 to rotate through the output shaft 252. Further, by reducing the structure and weight of the propeller 100, the entire flying apparatus 200 is made simpler and more compact, and light weight is achieved. In this embodiment, the number of the arms 230 may be two, the two arms 230 are respectively connected to opposite sides of the machine body 210, and accordingly, the number of the driving motors 250 and the number of the propellers 100 are also two, and the two driving motors 250 are respectively disposed on the two arms 230 and are respectively connected to the two propellers 100 in a one-to-one correspondence.

Referring to fig. 2 and 3, the propeller 100 includes a hub 10, a blade device 30, and a folding device 50, wherein the blade device 30 includes a first blade assembly 32 and a second blade assembly 34, and the first blade assembly 32 and the second blade assembly 34 are rotatably connected to the hub 10 to be unfolded or folded relative to the hub 10, respectively. Referring to fig. 4, the folding device 50 includes a mounting base 52, a folding driving mechanism 54, a first folding driving mechanism 56 and a second folding driving mechanism 58, wherein the mounting base 52 is fixedly disposed on the hub 10, the folding driving mechanism 54 is slidably disposed on the mounting base 52, the first folding driving mechanism 56 is connected between the folding driving mechanism 54 and the first blade assembly 32 and is used for driving the first blade assembly 32 to unfold or fold relative to the hub 10 under the driving of the folding driving mechanism 54, and the second folding driving mechanism 58 is connected between the folding driving mechanism 54 and the second blade assembly 34 and is used for driving the second blade assembly 34 to unfold or fold relative to the hub 10 under the driving of the folding driving mechanism 54.

The folding device 50 of the propeller can drive the first folding transmission mechanism 56 and the second folding transmission mechanism 58 to simultaneously drive the two blade assemblies to rotate through the folding driving mechanism 54, so that the structure of the folding device 50 can be simplified, the mass and the volume of the folding device 50 can be reduced, and the mass and the production cost of the propeller 100 can be reduced. Further, the folding driving mechanism 54 slides relative to the mounting base 52, so that interference to the self-movement of the first folding driving mechanism 56 and the second folding driving mechanism 58 can be avoided when the first folding driving mechanism 56 and the second folding driving mechanism 58 are driven, and flexibility of the folding device 50 is improved.

Referring to fig. 2 again, in the present embodiment, the hub 10 includes a first fixing member 12 and a second fixing member 14, the first fixing member 12 and the second fixing member 14 are substantially the same plate-shaped structure, the second fixing member 14 and the first fixing member 12 are disposed at opposite intervals to form a receiving space 16, and the receiving space 16 is used for receiving a part of the structure of the folding device 50.

In this embodiment, the first fixing member 12 includes a first fixing portion 121, a first positioning portion 123 and a first connecting portion 125, the first fixing portion 121 and the first positioning portion 123 are respectively disposed at two opposite ends of the first fixing member 12, the first connecting portion 125 is connected between the first fixing portion 121 and the first positioning portion 123, the first connecting portion 125 is provided with a first opening 1251, the first opening 1251 penetrates through the first linking portion 125 and is communicated with the accommodating space 16, and the first opening 1251 and the accommodating space 16 jointly accommodate part of the structure of the folding device 50, so as to reduce the volume of the flying apparatus 200 and save the space occupied by the flying apparatus 200.

In this application, the terms "mounted," "connected," "secured," and the like are to be construed broadly, unless otherwise specifically indicated or defined. For example, the connection can be fixed connection, detachable connection or integral connection; can be mechanically or electrically connected; the connection may be direct, indirect via an intermediate medium, or communication between two elements, or only surface contact. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

The second fixing member 14 includes a second fixing portion 141, a second positioning portion 143, and a second connecting portion 145, where the second fixing portion 141 and the second positioning portion 143 are respectively disposed at opposite ends of the second fixing member 14, the second connecting portion 145 is provided with a second opening 1451 (as shown in fig. 9), the second opening 1451 is disposed at a substantially middle position of the second connecting portion 145, and the second opening 1451 is used for mounting an output shaft 252 of the driving motor 250, so as to reduce the volume of the propeller 100 and save space occupied by the flying device 200.

In the present embodiment, the first blade assembly 32 includes a first blade body 321, a first clamping member 323 and a second clamping member 325, the first clamping member 323 and the second clamping member 343 are respectively connected to the first blade body 321, the first clamping member 323 and the second clamping member 325 are disposed at opposite intervals, and the first clamping member 323 and the second clamping member 325 are disposed between the first fixing portion 121 and the second fixing portion 141.

In this embodiment, the first clamping member 323 includes a first mounting portion 3231 and a second mounting portion 3233 that are disposed opposite to each other, the second clamping member 325 includes a third mounting portion 3251 and a fourth mounting portion 3253 that are disposed opposite to each other, the first mounting portion 3231 and the third mounting portion 3251 are movably connected to the first fixing portion 121 and the second fixing portion 141 (e.g. by a structure such as a rotation shaft), a first gap 3203 is disposed between the first mounting portion 3231 and the third mounting portion 3251, and the first gap 3203 is used for accommodating a part of the structure of the folding device 50, so that the first blade assembly 32 is unfolded or folded relative to the hub 10 under the driving of the folding device 50.

Further, the first blade assembly 32 may further include a first shaft 327 (as shown in fig. 3), where the first mounting portion 3231, the third mounting portion 3251, the first fixing portion 121 and the second fixing portion 141 are all provided with through holes, each of which is substantially coaxial, and the first shaft 327 is sequentially inserted through the through holes, that is, the first shaft 327 is sequentially inserted through the first fixing portion 121, the first mounting portion 3231, the third mounting portion 3251 and the second fixing portion 141, so that the first blade assembly 32 is rotatably connected to the hub 10, and the first blade assembly 32 can rotate around the first shaft 327 relative to the hub 10.

The fourth mounting portion 3253 is stacked on the second mounting portion 3233, the second mounting portion 3233 and the fourth mounting portion 3253 are each provided with a through hole, the two through holes are substantially coaxial and communicate, the two through holes together form a first locking portion 3201, and the first locking portion 3201 is configured to cooperate with other structures of the propeller 100 to fix the first blade assembly 32 relative to the hub 10.

The structure of the second blade assembly 34 is substantially the same as that of the first blade assembly 32, in this embodiment, the second blade assembly 34 includes a second blade body 341, a third clamping member 343 and a fourth clamping member 345, the third clamping member 343 and the fourth clamping member 345 are respectively connected to the second blade body 341, the third clamping member 343 and the fourth clamping member 345 are disposed at opposite intervals, and the third clamping member 343 and the fourth clamping member 345 are disposed between the first fixing portion 121 and the second fixing portion 141.

In the embodiment of the present application, the third clamping member 343 includes a fifth mounting portion 3431 and a sixth mounting portion 3433 that are disposed opposite to each other, the fourth clamping member 345 includes a seventh mounting portion 3451 and an eighth mounting portion 3453 that are disposed opposite to each other, the fifth mounting portion 3431 and the seventh mounting portion 3451 are movably connected to the first fixing portion 121 and the second fixing portion 141, a second gap 3403 is disposed between the fifth mounting portion 3431 and the seventh mounting portion 3451, and the second gap 3403 is used for accommodating a part of the structure of the folding device 50, so that the second blade assembly 34 is unfolded or folded relative to the hub 10 under the driving of the folding device 50.

Further, the second blade assembly 34 may further include a second rotating shaft 347 (as shown in fig. 3), where the fifth mounting portion 3431, the seventh mounting portion 3451, the first fixing portion 121 and the second fixing portion 141 are provided with through holes, each of which is substantially coaxial, and the second rotating shaft 347 is sequentially inserted through the through holes, that is, the second rotating shaft 347 is sequentially inserted through the first fixing portion 121, the fifth mounting portion 3431, the seventh mounting portion 3451 and the second fixing portion 141, so that the second blade assembly 34 is rotatably connected to the hub 10, and the second blade assembly 34 can rotate around the first rotating shaft 327 relative to the hub 10.

The eighth mounting portion 3453 is stacked on the sixth mounting portion 3433, and the sixth mounting portion 3433 and the eighth mounting portion 3453 are each provided with a through hole, the two through holes being substantially coaxial and communicating, the two through holes together forming a first locking portion 3201, the first locking portion 3201 being adapted to cooperate with other structures of the propeller 100 to fix the second blade assembly 34 relative to the hub 10.

Referring to fig. 5, in the present embodiment, the mounting base 52 has a guiding structure 521, and the guiding structure 521 is disposed along a first direction X. The guide structure 521 is generally a rail structure (e.g., a rail bar, a guide slot, etc.) and the guide structure 521 is capable of guiding the folding drive mechanism 54 as it slides relative to the mounting 52. The mounting seat 52 further includes a first end 523 and a second end 525 disposed opposite to each other, wherein the first end 523 and the second end 525 are disposed at opposite ends of the guiding structure 521, the first end 523 is connected between the first fixing portion 121 and the guiding structure 521, the second end 525 is connected between the first positioning portion 123 and the guiding structure 521, and the first end 523 and the second end 525 enable the mounting seat 52 to be fixedly disposed on the hub 10.

In the present embodiment, the folding driving mechanism 54 is accommodated in the installation space 16 and at least partially exposed to the first opening 1251, and the folding driving mechanism 54 slidably cooperates with the guide structure 521 to slide in the first direction X relative to the installation base 50. The folding drive mechanism 54 may include a folding drive 541 and a worm gear mechanism 543, where the folding drive 541 is coupled to the guide 521 and is capable of sliding relative to the guide 521, for example, the folding drive 541 may be slidably coupled by a rail or a nested engagement of the rail structure and the guide 521. The worm gear 543 is connected between the folding driving member 541 and the first folding transmission assembly 56, and is also connected between the folding driving member 541 and the second folding transmission assembly 58. Specifically, the worm gear 543 is connected to the output end of the folding driving member 541, and can rotate under the driving of the folding driving member 541, so as to drive the first folding transmission mechanism 56 and the second folding transmission mechanism 58 to move. In this embodiment, the folding driving member 541 may be an electric rotation driving member, such as a rotating motor, or may be a pneumatic rotation driving member (such as a rotating cylinder) or a hydraulic rotation driving member (such as a rotating hydraulic cylinder). The worm in the worm gear mechanism 543 is connected to the output shaft of the folding driving member 541, and the worm rotates under the driving of the folding driving member 541, the worm wheel in the worm gear mechanism 543 is meshed with the worm, the output shaft of the worm wheel is connected to the first folding transmission mechanism 56 and the second transmission mechanism 58, and the worm wheel can rotate under the driving of the worm to drive the first folding transmission mechanism 56 and the second folding transmission mechanism 58 to move.

In this embodiment, the folding driving mechanism 54 further includes a housing 545, the housing 545 is connected to the mounting base 52, the folding driving member 541 and the worm gear mechanism 543 are accommodated in the housing 545, the housing assembly housing 545 provides a closed space for the folding driving member 541 and the worm gear mechanism 543, so that the folding driving member 541 and the worm gear mechanism 543 are isolated from the external environment, the waterproof and dustproof effects are achieved, meanwhile, local leakage of internal grease or lubricating oil is prevented, and the service life and reliability of the folding driving mechanism 50 are improved.

The first folding transmission mechanism 56 includes a first transmission lever 561 and a first transmission connection member 563, and the first transmission lever 561 is connected to one side of the folding driving structure 54 and can be rotated by the folding driving structure 54. The first transmission connecting piece 563 is slidably sleeved on the first transmission rod 561 and connected with the first blade assembly 32, and the first transmission connecting piece 563 is driven by the first transmission rod 561 to rotate so as to enable the first blade assembly 32 to rotate relative to the hub 10.

In this embodiment, the first transmission rod 561 is a screw rod, the first transmission connector 563 includes a first connection rod portion 5631 and a first nut portion 5633, and the first nut portion 5633 is sleeved on the first transmission rod 561 and is screwed with the first transmission rod 561, so as to drive the first transmission connector 563 to translate along the axial direction of the first transmission rod 561. The first link portion 5631 is connected between the first blade assembly 32 and the first nut portion 5633, specifically, the first link portion 5631 may be integrally connected with the first nut portion 5633, and one end of the first link portion 5631 is fixed with respect to the first nut portion 5633 and may translate along the axial direction of the first transmission lever 561 along with the first nut portion 5633. The other end of the first link portion 5631 is rotatably connected to the first blade assembly 32, for example, rotatably connected to/sleeved on the first rotation shaft 327, and when the first link portion 5631 is translated along with the first nut portion 5633, the first link portion 5631 can generate a rotation movement trend around the first rotation shaft 327 due to the length-limited movement track of the first link portion 5631, and the rotation movement trend of the first link portion 5631 is not limited due to the translation of the whole folding device 50 along the mounting base 52, and the translation of the whole folding device 50 along the guide structure 521 while the first link portion 5631 is rotated. Therefore, the first blade assembly 32 can be driven to rotate by the translational and rotational movement of the first link portion 5631, for example, in the first example, an end of the first link portion 5631 away from the first nut portion 5633 may be relatively fixedly connected to the first blade body 321 or the first clamping member 323 or the second clamping member 325 of the first blade assembly 32, and when the first link portion 5631 rotates, it can drive the first blade assembly 32 to rotate around the first rotation axis 327; as another example, in the second embodiment, an end of the first link portion 5631 remote from the first nut portion 5633 is rotatably sleeved on the first rotation shaft 327, and the first blade assembly 32 is driven to rotate by providing other rotation driving components to cooperate with the rotation of the first link portion 5631.

According to the second example described above, a plurality of driving teeth engaged with each other are provided between the first blade assembly 32 and the first transmission connection 563 to drive the first blade assembly 32 to rotate in cooperation with the rotation of the first connection 5631. Specifically, for example, in the embodiment of the present application, the first transmission connection member 563 may further include a plurality of first driving teeth 5635, and the first driving teeth 5635 are disposed on a side of the first transmission connection member 563 facing the first blade assembly 32, for example, integrally connected to an outer circumference of the first connection member 5631. The plurality of first driving teeth 5635 are substantially part of a tooth structure of a gear whose geometric center may be located on the first link portion 5631, so that the plurality of first driving teeth 5635 may be considered to be sequentially spaced along a predetermined circular arc and fixedly coupled with respect to the first link portion 5631.

Further, the first folding transmission 56 further includes a first rotating member 565, where the first rotating member 565 is connected to the first blade assembly 32 and disposed in the first gap 3203, and the first rotating member 565 is provided with a plurality of first engaging teeth 5651, and the first engaging teeth 5651 are disposed on a side of the first rotating member 565 facing the first driving teeth 5635, and the plurality of first engaging teeth 5651 are engaged with the plurality of first driving teeth 5635, so that the first folding driving mechanism 56 can drive the first blade assembly 32 to rotate under the driving of the folding driving mechanism 54. Specifically, the plurality of first mating teeth 5651 are generally part of a tooth structure of a gear, and a geometric center of the gear may be located on the first rotation shaft 327, so that the plurality of first mating teeth 5651 may be considered to be sequentially spaced along a predetermined circular arc (a center of the circular arc may generally fall on an axis of the first rotation shaft 327) and fixedly connected with respect to the fourth mounting portion 3253 or the first blade body 321, and when the first nut portion 5633 translates along the guide structure 521, the first driving teeth 5635 are driven to translate along the guide structure 521, and due to engagement between the first driving teeth 5635 and the first mating teeth 5651, the translational movement of the first driving teeth 5635 forces the first mating teeth 5651 to rotate about the first rotation shaft 327, thereby driving the fourth mounting portion 3253 or the first blade body 321 to rotate about the first rotation shaft 327.

In the embodiment of the present application, the specific connection structure between the first mating tooth 5651 and the first blade assembly 32 should not be limited, and the mounting position of the first mating tooth 5651 should not be limited, for example, the first mating tooth 5651 may be an independent multi-tooth structure, which is rotatably sleeved outside the first rotation shaft 327 and fixedly connected with respect to the fourth mounting portion 3253 or the second mounting portion 3233, and when the first mating tooth 5651 rotates around the first rotation shaft 327, the first blade assembly 32 is driven to rotate by the fourth mounting portion 3253 or the second mounting portion 3233; as another example, the first mating teeth 5651 may be a tooth-like structure that is attached to the fourth mounting portion 3253 or the second mounting portion 3233 (e.g., the first mating teeth 5651 may be integrally formed with the fourth mounting portion 3253 or the second mounting portion 3233); for another example, the first mating teeth 5651 may be a tooth-like structure that is attached to the first blade body 321 (e.g., the first mating teeth 5651 may be integrally formed with the first blade body 321), and so on.

Further, in the embodiment of the present application, the first mating teeth 5651 may be a plurality of teeth on a complete gear or a plurality of teeth on a partial gear, and similarly, the first driving teeth 5635 may be a plurality of teeth on a complete gear or a plurality of teeth on a partial gear, and specific examples thereof should not be limited by the present specification and the drawings of the present specification. In this embodiment, the first engagement teeth 5651 are engaged with the first driving teeth 5635, so that the first folding transmission mechanism 56 is more stable in transmission, and the folding device 50 can bear a larger load, and is suitable for a large-load propeller 100. In other embodiments, the first mating teeth 5651 and the first drive teeth 5635 may be omitted, and the first folding transmission 56 directly drives the first blade assembly 32 to fold via the first transmission lever 561, for specific implementations reference is made to the first example illustrated above.

In addition, in a possible third example, similar to the first example, one end of the first transmission connector 563 is relatively fixedly connected to the first blade body 321 or the first clamping member 323 or the second clamping member 325 of the first blade assembly 32, and the other end is slidably sleeved on the first transmission rod 561. In this case, the first transmission rod 561 may not have a screw structure (for example, may be a polished rod), and the folding driving mechanism 54 may be a translational driving member, and for example, the folding driving mechanism 54 may be a linear motor or a linear cylinder. The folding driving mechanism 54 can slide the first transmission connection member 563 along the first transmission rod 561 by driving the first transmission rod 561 and the second transmission rod 581 to translate along the first direction X, so that the first connection member 5631 rotates to drive the first blade assembly 32 to rotate.

The second folding transmission mechanism 58 includes a second transmission rod 581 and a second transmission connecting member 583, where the second transmission rod 581 is connected to one side of the folding driving structure 54, and the second transmission rod 581 can be driven by the folding driving structure 54 to rotate. In this embodiment, the second transmission rod 581 is a screw rod, the second transmission rod 581 and the first transmission rod 583 are respectively connected to two opposite sides of the folding driving structure 54, the second transmission rod 581 and the first transmission rod 583 are disposed along the second direction Y and are coaxially connected, the first direction X intersects with the second direction Y, and an included angle between the first direction X and the second direction Y may be greater than or equal to 45 degrees, in this embodiment, the first direction X and the second direction Y may be perpendicular to each other. In this embodiment, the second transmission rod 581 and the second transmission connecting piece 583 may be integrally formed, that is, the two screw structures may be formed on the same main rod, and the main rod is connected to the output shaft of the worm wheel, or the main rod is inserted into the central hole of the worm wheel, so that the screw thread of the second transmission rod 581 and the screw thread of the second transmission connecting piece 583 are respectively located on two opposite sides of the worm. Further, the screw thread of the first transmission lever 561 is rotated in the opposite direction to the screw thread of the second transmission lever 581, so that the rotational direction of the first blade assembly 32 with respect to the hub 10 is opposite to the rotational direction of the second blade assembly 34 with respect to the hub 10.

The second transmission connecting piece 583 is slidably sleeved on the second transmission rod 581 and connected with the second blade assembly 34, and the second transmission connecting piece 583 is driven by the second transmission rod 581 to rotate so as to enable the second blade assembly 34 to rotate relative to the hub 10. Further, the second transmission connecting piece 583 includes a second connecting rod portion 5831 and a second nut portion 5833, where the second nut portion 5833 is sleeved on the second transmission rod 581 and is screwed with the second transmission rod 581, so as to drive the second transmission connecting piece 583 to translate along the axial direction of the first transmission rod 561. The second link portion 5831 is connected between the second blade assembly 34 and the second nut portion 5833, and specifically, the second link portion 5831 may be integrally connected with the second nut portion 5833, and one end of the second link portion 5831 may be fixed with respect to the second nut portion 5833 and may be translatable along the axial direction of the second transmission rod 581 along with the second nut portion 5833. The other end of the second link portion 5831 is rotatably connected to the second blade assembly 34, for example, rotatably connected to/sleeved on the second rotation shaft 347, and when the second link portion 5831 translates along with the second nut portion 5833, the second link portion 5831 can generate a rotation movement trend around the second rotation shaft 347 due to the length-limited movement track of the second link portion 5831, and the rotation movement trend of the second link portion 5831 is not limited due to the translation of the whole folding device 50 along the mounting seat 52, and the whole folding device 50 translates along the guide structure 521 while the second link portion 5831 rotates. Therefore, the second blade assembly 34 can be driven to rotate by the translational and rotational movement of the second link portion 5831, for example, in the fourth example, an end of the second link portion 5831 away from the second nut portion 5833 may be relatively fixedly connected to the second blade body 341 or the third clamping member 343 or the fourth clamping member 345 of the second blade assembly 34, and when the second link portion 5831 rotates, it can drive the second blade assembly 34 to rotate around the second rotation shaft 347; as another fifth example, an end of the second link portion 5831 remote from the second nut portion 5833 is rotatably sleeved on the second rotating shaft 347, and other rotation driving components are provided to cooperate with rotation of the second link portion 5831 to drive the second paddle assembly 34 to rotate.

According to the fourth example described above, a plurality of driving teeth engaged with each other are provided between the second blade assembly 34 and the second transmission link 583 to drive the second blade assembly 34 to rotate in cooperation with the rotation of the second link portion 5831. Specifically, for example, in the embodiment of the present application, the second transmission connection member 583 may further include a plurality of second driving teeth 5835, where the second driving teeth 5835 are disposed on a side of the second transmission connection member 583 facing the second blade assembly 34, for example, integrally connected to an outer circumference of the second link portion 5831. The plurality of second driving teeth 5835 are generally part of a gear whose geometric center may be located on the second link portion 5831, and thus the plurality of second driving teeth 5835 may be considered to be sequentially spaced apart along a predetermined circular arc and fixedly coupled with respect to the second link portion 5831.

Further, the second folding transmission 58 further includes a second rotating member 585, where the second rotating member 585 is connected to the second paddle assembly 34 and disposed in the second gap 3403. The second rotating member 585 is provided with a plurality of second engaging teeth 5851, the second engaging teeth 5851 are disposed on a side of the second rotating member 585 facing the second driving teeth 5835, and the plurality of second engaging teeth 5851 are engaged with the plurality of second driving teeth 5835, so that the second folding driving mechanism 58 can drive the second blade assembly 34 to rotate under the driving of the folding driving mechanism 54. Specifically, the plurality of second mating teeth 5851 are generally part of a gear whose geometric center may be located on the second rotating shaft 347, so that the plurality of second mating teeth 5851 may be considered to be sequentially spaced along a predetermined circular arc (the center of which may generally fall on the axis of the second rotating shaft 347) and fixedly connected with respect to the eighth mounting portion 3453 or the second blade body 341, and when the second nut portion 5833 translates along the guide structure 521, the second driving teeth 5835 are driven to translate along the guide structure 521, and due to the engagement between the second driving teeth 5835 and the second mating teeth 5851, the translational movement of the second driving teeth 5835 forces the second mating teeth 5851 to rotate about the second rotating shaft 347, thereby driving the eighth mounting portion 3453 or the second blade body 341 to rotate about the second rotating shaft 347.

In the embodiment of the present application, the specific connection structure between the second mating tooth 5851 and the second blade assembly 34 should not be limited, and the installation position of the second mating tooth 5851 should not be limited, for example, the second mating tooth 5851 may be an independent multi-tooth structure, which is rotatably sleeved outside the second rotating shaft 347 and fixedly connected with respect to the eighth installation portion 3453 or the sixth installation portion 3433, and when the second mating tooth 5851 rotates around the second rotating shaft 347, the second blade assembly 34 is driven to rotate by the eighth installation portion 3453 or the sixth installation portion 3433; as another example, the second mating teeth 5851 may be tooth-like structures attached to the eighth mounting portion 3453 or the sixth mounting portion 3433 (e.g., the second mating teeth 5851 may be integrally formed with the eighth mounting portion 3453 or the sixth mounting portion 3433); for another example, the second mating teeth 5851 may be a tooth-like structure attached to the second blade body 341 (e.g., the second mating teeth 5851 may be integrally formed with the second blade body 341), and so on.

Further, in the embodiment of the present application, the second mating teeth 5851 may be a plurality of teeth on a complete gear or a plurality of teeth on a partial gear, and similarly, the second driving teeth 5835 may be a plurality of teeth on a complete gear or a plurality of teeth on a partial gear, and specific examples thereof should not be limited by the present specification and the drawings of the present specification. In this embodiment, the second engagement teeth 5851 and the second driving teeth 5835 are engaged with each other, so that the second folding transmission mechanism 58 is more stable in transmission, and the folding device 50 can bear a larger load, so as to be suitable for a large-load propeller 100. In other embodiments, the second mating teeth 5851 and the second driving teeth 5835 may be omitted, and the second folding transmission 58 directly drives the second blade assembly 34 to fold through the second transmission rod 581, and for specific implementation, reference may be made to the fourth example listed above.

In addition, in a possible sixth example, similar to the fourth example, one end of the second transmission connecting member 583 is relatively fixedly connected to the second blade body 341 or the second clamping member 343 or the second clamping member 345 of the second blade assembly 34, and the other end is slidably sleeved on the second transmission rod 581. In this case, the second transmission rod 581 may have no screw structure (for example, may be a polished rod), and the folding driving mechanism 54 may be a translational driving member, and for example, the folding driving mechanism 54 may be a linear motor or a linear cylinder. The folding driving mechanism 54 can slide the second transmission connecting piece 583 along the second transmission rod 581 by driving the second transmission rod 581 and the second transmission rod 581 to translate along the second direction X, so that the second link portion 5831 rotates to drive the second paddle assembly 34 to rotate.

In the present embodiment, the worm wheel in the worm gear mechanism 543 is used as the output end of the folding driving mechanism 54, and the output shaft of the worm wheel is used to coaxially connect the first transmission rod 561 and the second transmission rod 581, or the first transmission rod 561 and the second transmission rod 581 may be inserted through the center hole of the worm wheel to directly be used as the output shaft of the worm wheel.

In summary, in the present embodiment, the folding driving member 541 drives the worm gear mechanism 543 to rotate, so as to drive the first transmission rod 561 and the second transmission rod 581 to rotate, so that the first nut portion 5633 translates along the first transmission rod 561 (along the negative direction of the second direction Y), and the second nut portion 5833 translates along the second transmission rod 581 (along the positive direction of the second direction Y), and the folding driving member 541 translates along the guiding structure 521, so as to drive the first transmission connecting member 563 and the second transmission connecting member 583 to simultaneously have the movements of the first direction X and the second direction Y to rotate, and finally, the plurality of first mating teeth 5651 and the plurality of first driving teeth 5635 are meshed to enable the first folding driving mechanism 56 to drive the first blade assembly 32 to rotate under the driving of the folding driving mechanism 54, and the plurality of second mating teeth 5851 and the plurality of second driving teeth 5835 are meshed to enable the second folding driving mechanism 58 to drive the second blade assembly 34 under the driving of the folding driving mechanism 54.

Therefore, the above-mentioned folding device 50 adopts the combination of the mounting base 52 and the folding driving mechanism 54, so that the driving reduction ratio of the folding device 100 is increased, and only the folding driving mechanism 54 with smaller volume is required to drive the first folding transmission mechanism 56 and the second folding transmission mechanism 58, so that the quality of the folding device 50 is reduced, and the quality of the propeller 100 is reduced. Further, the folding device 50 can drive two blade assemblies to rotate simultaneously, so that the structure of the propeller 100 is simplified, and the production cost of the propeller 100 is reduced. Further, the whole folding device 50 has a certain process position locking capability due to the self-locking characteristic of the worm gear and the high rigidity of the first transmission rod 561 and the second transmission rod 581.

Referring to fig. 6 to 8, in the present embodiment, the propeller 100 further includes a locking device 70, wherein the locking device 70 is disposed between the hub 10 and the blade device 30, and the locking device 70 can cooperate with the first locking portion 3201 and the second locking portion 3401 to lock the blade device 30, thereby fixing the position of the blade device 30 relative to the hub 10. Specifically, the locking device 70 includes a locking driving member 72, a first locking member 74, and a second locking member 76, wherein the locking driving member 72 is disposed on the hub 10, and the first locking member 74 and the second locking member 76 are respectively connected to both sides of the locking driving member 72.

In the embodiment of the present application, the lock driving member 72 is disposed between the first positioning portion 123 and the second positioning portion 143 at a substantially middle position. In some embodiments, the locking driver 72 may include a stator fixedly disposed between the first and second positioning portions 123 and 143, and an output rotor connected between the stator and the first and second locking members 74 and 76. The lock drive 72 may be a magnetically driven rotary drive, for example, the stator and the output rotor are electromagnets, and the output rotor can be rotated relative to the stator by controlling the magnitude and direction of the current input to the electromagnets. In other embodiments, the lock actuator 72 may be a rotary motor, a rotary cylinder, or the like.

In the present embodiment, the first locking member 74 is capable of moving relative to the hub 10 to be caught or disengaged with the first locking portion 3201 under the driving of the locking driving member 72, and further, the first blade assembly 32 is capable of rotating relative to the hub 10 in a state in which the first locking member 74 is disengaged with the first locking portion 3201; in a state where the first locking member 74 is engaged with the first locking portion 3201, the first locking member 74 is sequentially inserted through the first positioning portion 123, the first locking portion 3201, and the second positioning portion 143, so as to fix the position of the first blade assembly 32 relative to the hub 10. The second locking member 76 is movable relative to the hub 10 to be caught or disengaged from the second locking portion 3401 by the driving of the locking driving member 72, and further, the second blade assembly 34 is rotatable relative to the hub 10 in a state in which the second locking member 76 is disengaged from the second locking portion 3401; in a state that the second locking member 76 is clamped with the second locking portion 3401, the second locking member 76 is sequentially inserted through the first positioning portion 123, the second locking portion 3401 and the second positioning portion 143 to fix the position of the second blade assembly 34 relative to the hub 10. Further, the first locking member 74 and the second locking member 76 have a taper at an end thereof adjacent to the second positioning portion 143, so as to perform guiding and deviation rectifying functions when the blade device 30 is deployed relative to the hub 10.

In this embodiment, the locking device 70 further includes a connecting member 75, a first locking member 74 and a second locking member 76 are respectively connected to opposite ends of the connecting member 75, the locking driving member 72 is connected to the connecting member 75 and located between the first locking member 74 and the second locking member 76, and the locking driving member 72 can drive the first locking member 74 and the second locking member 76 to move relative to the hub 10 through the connecting member 75.

In this embodiment, the locking device 70 further includes a locking transmission member 78, where the locking transmission member 78 is disposed through the locking driving member 72 and connected between the locking driving member 72 and the connecting member 75, and the locking transmission member 78 can drive the connecting member 75 to move under the driving of the locking driving member 72, so as to drive the first locking member 74 and the second locking member 76 to move relative to the hub 10, so as to implement conversion between the rotational movement of the locking driving member 72 and the linear movement of the first locking member 74 and the second locking member 76.

In some embodiments, the locking transmission 78 may be a sliding lead screw nut mechanism, and in other embodiments, the locking transmission 78 may be a rolling lead screw nut mechanism. In the present embodiment, the locking transmission 78 includes a threaded shaft and a nut at least partially received within the locking drive 72 and coupled to the output rotor, the threaded shaft extending through the nut. Further, the screw rod is in threaded engagement with the nut, and the nut is driven to rotate by the output rotor, so that the screw rod is driven to move relative to the nut.

Further, the axial direction of the screw is substantially parallel to the axial directions of the first locking member 74 and the second locking member 76, and the screw is substantially parallel to the axial directions of the first rotation shaft 327 and the second rotation shaft 347, so that the first locking member 74 and the second locking member 76 move along the axial direction of the screw, that is, the first locking member 74 is disengaged from the first locking portion 3201 in the axial direction of the screw, and the second locking member 76 is disengaged from the second locking portion 3401 in the axial direction of the screw.

Therefore, the locking mechanism 70 can utilize the rotational movement of the locking driving member 72 and convert the rotational movement into the linear movement of the locking transmission member 78, thereby realizing the clamping and releasing of the first locking member 74 relative to the first locking portion 3201 and the second locking member 76 relative to the second locking portion 3401, finally completing the releasing and locking functions after folding and unfolding the blade device 30, improving the stability between the blade device 30 and the hub 10, and improving the reliability of the propeller 100. Further, the first locking member 74 is not coaxial with the first transmission rod 561 and the second locking member 76 is not coaxial with the second transmission rod 581, so that the first locking member 74 and the second locking member 76 can have both locking function and guiding function under linear motion, thereby reducing the number of parts to be arranged and thus the complexity of the locking mechanism 70 and the overall mass of the propeller 100.

Referring to fig. 9 and 10, in the present embodiment, the propeller 100 further includes a limiting device 90, where the limiting device 90 is disposed on the second fixing member 14, and the limiting device 90 can be matched with the first locking member 74 and the second locking member 76 to fix the position of the first locking member 74 relative to the first locking portion 3201 and the position of the second locking member 76 relative to the second locking portion 3401. Specifically, in the present embodiment, the limiting device 90 includes a limiting driving member 92, a first limiting member 94 and a second limiting member 96, the limiting driving member 92 is disposed on the hub 10, and the first limiting member 94 and the second limiting member 96 are respectively connected to two sides of the limiting driving member 92.

In the embodiment of the present application, the limit driver 92 is disposed between the lock driver 72 and the second positioning portion 143 and is located at a substantially middle position. In some embodiments, the limit drive 92 may include a stator fixedly disposed between the lock drive 72 and the second positioning portion 143, and an output rotor connected between the stator and the first and second limit members 94, 96. The limit driver 92 may be a magnetically driven rotary driver, for example, the stator and the output rotor are electromagnets, and the output rotor can be rotated relative to the stator by controlling the magnitude and direction of the current input to the electromagnets. In other embodiments, the limit drive 92 may be a rotary drive such as a rotary motor, a rotary cylinder, or the like.

In this embodiment, the first limiting member 94 and the second limiting member 96 are disposed between the two through holes of the second mounting portion 143, and the first limiting member 94 can move relative to the first locking member 72 under the driving of the limiting driving member 92 to be clamped with or separated from the first locking member 74, specifically, the first limiting member 94 can move towards the center direction of the through hole on the second mounting portion 143, which is matched with the first locking member 74, under the driving of the limiting driving member 92 to be clamped with the first locking member 74 in the through hole; or the first stopper 94 is movable in a direction away from the through hole of the second mounting portion 143 to which the first locking member 74 is engaged, by the stopper driving member 92, so as to be disengaged from the first locking member 74 in the through hole. Further, the first stopper 94 is movable with respect to the first locking portion 3201 in a state where it is disengaged from the first locking member 74. In the present embodiment, the first locking member 74 is provided with the groove 7401, the first limiting member 94 is locked into the groove 7401 toward one end of the first locking member 74, the groove 7401 is circumferentially provided along the outer wall of the first locking member 74, so that the first limiting member 94 is locked with the first locking member 74, at this time, the first limiting member 94 can fix the position of the first locking member 74 relative to the first locking portion 3201, so that the first locking member 74 cannot move along the axial direction of the first rotating shaft 327, and therefore, the first limiting member 94 can play a role of limiting the first locking member 74 and locking the locking device 70.

The second limiting member 94 is capable of moving relative to the second locking member 72 under the driving of the limiting driving member 92 to be engaged with or disengaged from the second locking member 76, specifically, the second limiting member 96 is capable of moving toward the center direction of the through hole on the second mounting portion 143 engaged with the second locking member 76 under the driving of the limiting driving member 92 to be engaged with the second locking member 76 in the through hole; or the second stopper 96 is movable in a direction away from the through hole of the second mounting portion 143 to which the second locking member 76 is fitted, by the driving of the stopper driving member 92, so as to be disengaged from the second locking member 72 in the through hole. Further, the second lock 76 is movable with respect to the second lock 3401 in a state where the second stopper 94 is disengaged from the second lock 76. In the present embodiment, the second locking member 76 is provided with the groove 7601, the groove 7601 is circumferentially disposed along the outer wall of the second locking member 76, the second limiting member 96 is snapped into the groove 7601 toward one end of the second locking member 76, so that the second limiting member 94 is snapped with the second locking member 76, at this time, the second limiting member 94 can fix the position of the second locking member 76 relative to the second locking portion 3401, so that the second locking member 76 cannot move along the axial direction of the second rotating shaft 347, and therefore, the second limiting member 96 can play a role of limiting the second locking member 76 and locking the locking device 70. In summary, in the present embodiment, the first limiting member 94 and the second limiting member 96 can avoid the first locking member 74 and the second locking member 76 from being separated under different operating conditions and installation modes, so that the risk of single-point failure of the first locking member 74 and the second locking member 76 is reduced.

Further, the first limiting member 94 is provided with a first rack 941, the second limiting member 96 is provided with a second rack 961, the limiting device 90 further includes a transmission gear 98, the transmission gear 98 is connected to an output shaft (not shown in the drawing) of the limiting driving member 92, the first rack 941 and the second rack 961 are respectively meshed with the transmission gear 98, and the transmission gear 98 can drive the first limiting member 94 and the second limiting member 96 to rotate under the driving of the limiting driving member 92.

In this embodiment, the limiting device 90 further includes a cover plate 99, where the cover plate 99 covers the first limiting member 94, the second limiting member 96 and the transmission gear 98, and the cover plate 99 can protect the structure of the limiting device 90, so that the limiting device 90 is isolated from the external environment, and functions of water resistance and dust resistance are achieved.

When the blade device 30 is folded relative to the hub 10, the first limiting member 94 is clamped with the first locking member 74, the second limiting member 96 is clamped with the second locking member 76, so that the limiting driving member 92 firstly rotates to drive the transmission gear 98 to rotate, and then drives the first limiting member 94 to move and unlock with the second limiting member 96, after unlocking, the locking driving member 72 rotates to drive the locking driving member 78 to linearly move, and the connecting member 75 further drives the first locking member 74 and the second locking member 76 to linearly move, and when the first locking member 74 is separated from the first locking portion 3201 and the second locking member 76 is separated from the second locking portion 3401, the folding driving member 541 drives the worm gear mechanism 543 to rotate, and then drives the first transmission rod 561 and the second transmission rod 581 to rotate, and under the action of the first mounting member 567, the first driving tooth 5635 and the first matching tooth 5651 are in a meshed state, so that the first matching tooth 5651 rotates around the first rotating shaft 327, namely, the first assembly 32 rotates around the first rotating shaft 327, and finally the first assembly 32 rotates around the first rotating shaft 327, and the first assembly 32 is folded relative to the hub 10; the second driving teeth 5835 are engaged with the second mating teeth 5851 by the second mounting member 587, such that the second mating teeth 5851 perform a rotational movement about the second axis of rotation 327, i.e., the second blade assembly 34 performs a rotational movement about the second axis of rotation 327, and the second blade assembly 34 is finally folded relative to the hub 10. Meanwhile, since the screw thread of the first transmission rod 561 is rotated in the opposite direction to the screw thread of the second transmission rod 581, the folding driving structure 54 slides along the mount 52 by the combined action of the first mount 567, the second mount 587, the first nut portion 5633, the second nut portion 5833, and the mount 52 until the blade device 30 is rotated to a desired angle.

The movement process when the blade arrangement 30 is deployed relative to the hub 10 is reversed to the folding process described above.

In the propeller provided by the embodiment of the application, the first blade assembly and the second blade assembly are respectively rotatably connected to the hub so as to be unfolded or folded relative to the hub. The folding driving mechanism is arranged on the mounting seat and can slide relative to the mounting seat, the first folding driving mechanism is connected between the folding driving mechanism and the first blade assembly, the second folding driving mechanism is connected between the folding driving mechanism and the second blade assembly, and the folding driving mechanism can simultaneously drive the first folding driving mechanism and the second folding driving mechanism to rotate, so that the first blade assembly and the second blade assembly are simultaneously driven to unfold or fold relative to the hub.

According to the folding device of the propeller, the first folding transmission mechanism and the second folding transmission mechanism are driven to simultaneously drive the two blade assemblies to rotate through the folding driving mechanism, so that the structure of the folding device can be simplified, the quality and the volume of the folding device are reduced, and the quality and the production cost of the propeller are reduced. Further, the folding driving mechanism slides relative to the mounting seat, so that interference caused by movement of the first folding driving mechanism and the second folding driving mechanism can be avoided when the first folding driving mechanism and the second folding driving mechanism are driven, and flexibility of the folding device is improved.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (11)

1. A propeller, comprising:

a hub;

a blade arrangement, the blade comprising a first blade assembly and a second blade assembly, the first blade assembly and the second blade assembly being respectively rotatably connected to the hub; and

the folding device is arranged on the hub and connected between the first blade assembly and the second blade assembly so as to control the blades to be unfolded or folded relative to the hub; the folding device includes:

the installation seat is fixedly arranged on the hub;

the folding driving mechanism is slidably arranged on the mounting seat;

the first folding transmission mechanism is connected between the folding driving mechanism and the first blade assembly and is used for driving the first blade assembly to unfold or fold relative to the hub under the driving of the folding driving mechanism; and

the second folding transmission mechanism is connected between the folding driving mechanism and the second blade assembly and is used for driving the second blade assembly to unfold or fold relative to the hub under the driving of the folding driving mechanism.

2. The propeller of claim 1, wherein the first folding transmission mechanism comprises a first transmission rod and a first transmission connector, the second folding transmission mechanism comprises a second transmission rod and a second transmission connector, the first transmission rod and the second transmission rod are respectively connected to two opposite sides of the folding driving mechanism, the first transmission connector is sleeved on the first transmission rod and connected with the first blade assembly, and the second transmission connector is sleeved on the second transmission rod and connected with the second blade assembly.

3. The propeller of claim 2, wherein the first folding transmission further comprises a first rotating member coupled to the first blade assembly, the first rotating member being provided with a plurality of first mating teeth; the first transmission connecting piece is sleeved outside the first transmission rod in a sliding manner, and is provided with a plurality of first driving teeth which are meshed with the first matching teeth; or/and (b)

The second folding transmission mechanism further comprises a second rotating piece connected to the second blade assembly, and the rotating piece is provided with a plurality of second matching teeth; the second transmission connecting piece is slidably sleeved outside the second transmission rod, a plurality of second driving teeth are arranged on the second transmission connecting piece, and the second driving teeth are meshed with the second matching teeth.

4. The propeller of claim 2, wherein the first drive rod is a lead screw, the first drive connection member includes a first link portion and a first nut portion, the first link portion is connected between the first nut portion and the first blade assembly, and the first drive rod is threaded through the nut portion and is screwed with the first nut portion;

The second transmission rod is a screw rod, the second transmission connecting piece comprises a second connecting rod portion and a second nut portion, the second connecting rod portion is connected between the second nut portion and the second blade assembly, and the second transmission rod penetrates through the nut portion and is screwed with the nut portion.

5. The propeller of claim 4, wherein the first drive rod is coaxially coupled to the second drive rod, and wherein the screw threads of the screw of the first drive rod are of opposite hand to the screw threads of the screw of the second drive rod.

6. The propeller of claim 2, wherein the mount has a guide structure disposed along a first direction, the fold drive mechanism slidably cooperating with the guide structure to slide relative to the mount along the first direction, the first drive rod and the second drive rod being disposed along a second direction and coaxially connected, the second direction intersecting the first direction.

7. The propeller as recited in any one of claims 1-6, further comprising a locking device connected between the hub and the blade device, the locking device comprising a locking drive, a first locking member, and a second locking member, the locking drive being disposed at the hub, the first locking member and the second locking member being connected to the locking drive, respectively; the first blade assembly is provided with a first locking part, the second blade assembly is provided with a second locking part, and the first locking part moves relative to the hub under the drive of the locking driving part so as to be clamped with or separated from the first locking part; the second locking piece moves relative to the hub under the drive of the locking driving piece so as to be clamped with or separated from the second locking part.

8. The propeller of claim 7, wherein the locking device further comprises a connecting member, the first locking member and the second locking member being connected to opposite ends of the connecting member, respectively, the locking driving member being connected to the connecting member and being located between the first locking member and the second locking member; the locking device further comprises a locking transmission piece, and the locking transmission piece penetrates through the locking driving piece and is connected between the locking driving piece and the connecting piece, so that the first locking piece and the second locking piece are driven by the locking driving piece to move.

9. The propeller of claim 7, further comprising a stop device, the stop device comprising a stop drive, a first stop and a second stop, the stop drive being disposed on the hub, the first stop being coupled to the stop drive and moving under the drive of the stop drive to engage or disengage the first locking member, the second stop being coupled to the stop drive and moving under the drive of the stop drive to engage or disengage the second locking member.

10. The propeller of claim 9, wherein the limit device further comprises a transfer gear coupled to the output shaft of the limit drive; the first limiting part is provided with a first rack, the second limiting part is provided with a second rack, and the first rack and the second rack are respectively meshed with the transmission gear.

11. A flying apparatus, comprising:

a body; and

the propeller of any one of claims 1-10, said propeller being mounted to said body.