Power assembly, motor and aircraft

Abstract

The utility model provides a power assembly, a motor and an aircraft, the power assembly comprises a motor and blades, the motor comprises a stator and a rotor, the rotor can rotate around a preset axis relative to the stator, the rotor comprises a main body part, a connecting part and a first detachable coupling part, and the first detachable coupling part is connected with the main body part through the connecting part; the paddle comprises a paddle body and a second detachable coupling part, one end of the paddle body is a paddle tip part, the other end of the paddle body is a paddle root part, the second detachable coupling part is arranged at the paddle root part, and the second detachable coupling part is detachably connected with the first detachable coupling part; the main body part is of an annular structure, at least part of the first detachable coupling part is located on the outer side of the periphery of the main body part, at least part of the first detachable coupling part and the outer surface of the periphery of the main body part are oppositely arranged, and at least part of the paddle root part and the projection position of the main body part on the preset axis are overlapped. According to the power assembly, the motor and the aircraft, the axial size of the power assembly can be reduced, and the miniaturization design of the aircraft is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft, and in particular to a power component, a motor and an aircraft. Background Art

[0002] With the advancement of science and technology, aircraft have found widespread use in applications such as crop protection, aerial photography, express delivery, and search and rescue. The power assembly of an aircraft generally consists of a motor and propeller blades. To facilitate maintenance or replacement, the propeller blades are typically detachably connected to the motor. However, the power assembly of aircraft in related art suffers from an unreasonable structural design, resulting in a large axial dimension and hindering the miniaturization of the aircraft. Utility Model Content

[0003] The utility model provides a power assembly, a motor and an aircraft, aiming to reduce the axial size of the power assembly and realize the miniaturization design of the aircraft.

[0004] An embodiment of the present invention provides a power assembly, comprising:

[0005] A motor, comprising a stator and a rotor, wherein the rotor is rotatable relative to the stator about a predetermined axis, the rotor comprising a main body, a connecting portion, and a first detachable coupling portion, wherein the first detachable coupling portion is connected to the main body via the connecting portion; and

[0006] The propeller comprises a propeller body and a second detachable coupling portion, wherein one end of the propeller body is a propeller tip portion and the other end is a propeller root portion, and the second detachable coupling portion is provided at the propeller root portion, and the second detachable coupling portion is detachably connected to the first detachable coupling portion to mount the propeller on the motor so that the rotor can drive the propeller to rotate;

[0007] In which, the main body is an annular structure, at least part of the first disassembly coupling part is located outside the periphery of the main body, and at least part of the first disassembly coupling part is arranged facing the peripheral outer surface of the main body, so that at least part of the propeller root overlaps with the projection position of the main body on the preset axis.

[0008] In the power assembly of the embodiment of the present utility model, a fixing member is further included, and the second detachable coupling portion is detachably connected to the first detachable coupling portion through the fixing member, so that the blade can rotate synchronously with the rotor;

[0009] There is at least a partial overlap between the projection position of the fixing member on the preset axis and the projection position of the main body on the preset axis.

[0010] In the power assembly of the embodiment of the present utility model, the connecting portion extends radially along the main body portion, the first disassembly coupling portion is protruded from the connecting portion, and the first disassembly coupling portion is at least partially provided outside the periphery of the main body portion.

[0011] In the power assembly of the embodiment of the present utility model, the first detachable coupling portion includes a plurality of;

[0012] The first detachable coupling portions are respectively arranged at equal intervals along the circumference of the main body; and / or,

[0013] The blades connected to the first detachable coupling parts are respectively arranged at equal intervals along the circumference of the main body.

[0014] In the power assembly of an embodiment of the present invention, the propeller root is provided with a positioning portion, which cooperates with the outer side of the periphery of the main body, and / or the positioning portion can cooperate with the connecting portion and / or the first disassembly coupling portion to position the propeller blade so that the propeller blade extends radially along the main body.

[0015] In the power assembly of the embodiment of the present utility model, the positioning portion includes an arcuate surface, and the arcuate surface abuts against the peripheral outer wall of the main body.

[0016] In the power assembly of the embodiment of the present utility model, the positioning portion includes a first limiting surface and a second limiting surface that are relatively spaced apart, and at least a portion of the connecting portion is located between the first limiting surface and the second limiting surface.

[0017] In the power assembly of the embodiment of the present invention, a recessed area is formed on the arc-shaped surface, and the recessed area is recessed in a direction away from the main body.

[0018] In the power assembly of the embodiment of the present invention, the recessed area is formed in the middle of the arc-shaped surface.

[0019] In the power assembly of an embodiment of the present utility model, the fixing part includes a fixing portion and a limiting portion, one end of the fixing portion is connected to the limiting portion, and the other end of the fixing portion passes through the blade and the first disassembly coupling portion in sequence for mechanical coupling, and the limiting portion is used to limit the movement of the blade in a direction parallel to the preset axis.

[0020] In the power assembly of the embodiment of the present utility model, the second disassembly coupling portion is provided with a through portion, the fixing portion passes through the through portion and the first disassembly coupling portion in sequence, and the maximum outline dimension of the limiting portion is greater than the maximum outline dimension of the through portion; and / or,

[0021] The surface of the limiting portion close to the fixing portion abuts against the blade.

[0022] The power assembly of the embodiment of the present invention further includes a blade protection cover, wherein the blade protection cover is formed with a receiving space, and the motor and the blades are arranged in the receiving space.

[0023] In the power assembly of the embodiment of the present invention, the stator is provided with a first coupling portion and a second coupling portion at both ends along the preset axis, respectively. The first coupling portion and the second coupling portion are connected to different parts of the blade guard, respectively.

[0024] In the power assembly of the embodiment of the present invention, the stator includes a shaft, and the shaft passes through the main body, so that the stator can be provided with the first coupling part and the second coupling part.

[0025] In the power assembly of the embodiment of the present invention, the stator further includes at least one mounting member connected to one end of the shaft, and the first coupling portion and / or the second coupling portion are arranged on the at least one mounting member.

[0026] In the power assembly of an embodiment of the present invention, the blade guard includes a protective member and a support member, the protective member is an annular structure to form a duct; the first coupling part and / or the second coupling part is connected to the protective member through the support member.

[0027] In the power assembly of an embodiment of the present invention, the support member includes a plurality of support parts, and the plurality of support parts are arranged at radial intervals along the duct, one end of each support part is fixedly connected to the protective member, and the other end is fixedly connected to the first coupling part or the second coupling part.

[0028] Another embodiment of the present invention further provides a motor, comprising:

[0029] The rotor comprises a stator and a rotor, wherein the rotor is rotatable relative to the stator around a preset axis, and the rotor comprises a main body, a connecting portion, and a first detachable coupling portion, wherein the first detachable coupling portion is connected to the main body via the connecting portion;

[0030] The first detachable coupling portion is used to be detachably connected to the second detachable coupling portion of the blade, the blade includes a blade body, one end of the blade body is a blade tip portion, and the other end is a blade root portion, and the second detachable coupling portion is provided at the blade root portion;

[0031] The main body is annular in structure, at least part of the first disassembly coupling part is located outside the periphery of the main body, and at least part of the first disassembly coupling part is arranged facing the peripheral outer surface of the main body, so that at least part of the propeller root overlaps with the projection position of the main body on the preset axis.

[0032] Another embodiment of the present invention further provides an aircraft, comprising:

[0033] racks; and

[0034] The power assembly or the motor as described above is installed on the frame, and is used to provide flight power for the aircraft.

[0035] Technical effect: The power assembly, motor and aircraft provided by the embodiments of the present invention are detachably connected through a first disassembly coupling portion on the outer side of the periphery of the main body of the motor and a second disassembly coupling portion on the root of the blade, so that there is at least partial overlap between the projection position of the root of the blade on the preset axis and the projection position of the main body on the preset axis, so that the blade can share at least part of the axial height with the main body, thereby reducing the overall axial size of the power assembly, which is beneficial to reducing the occupied space of the aircraft including the power assembly and facilitating the miniaturization design of the aircraft.

[0036] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory and cannot limit the disclosure of the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] FIG1(A) is a schematic structural diagram of an aircraft provided in one embodiment of the present invention;

[0039] FIG1(B) is a schematic structural diagram of an aircraft provided in one embodiment of the present invention;

[0040] Figure 2 This is a schematic structural diagram of a power assembly provided by an embodiment of the present utility model;

[0041] Figure 3 This is a schematic structural diagram of an aircraft provided by an embodiment of the present utility model;

[0042] Figure 4 This is a schematic structural diagram of a power assembly provided by an embodiment of the present utility model;

[0043] Figure 5 This is a cross-sectional view of a power assembly provided by one embodiment of the present utility model;

[0044] Figure 6 This is an exploded schematic diagram of a power assembly provided by an embodiment of the present utility model;

[0045] Figure 7 This is a partial structural diagram of a power assembly provided by an embodiment of the present utility model;

[0046] Figure 8 This is a partial structural diagram of a power assembly provided by an embodiment of the present utility model;

[0047] Figure 9 This is a partial structural diagram of a power assembly provided by an embodiment of the present utility model;

[0048] Figure 10 This is a partial structural diagram of a power assembly provided by an embodiment of the present utility model;

[0049] Figure 11 This is a partial structural diagram of a power assembly provided by an embodiment of the present utility model;

[0050] Figure 12 This is a partial structural diagram of a power assembly provided by an embodiment of the present utility model;

[0051] Figure 13 This is a partial structural diagram of a blade provided by an embodiment of the present utility model;

[0052] Figure 14 This is an exploded schematic diagram of a power assembly provided by an embodiment of the present utility model;

[0053] Figure 15 This is a schematic structural diagram of a power assembly provided by an embodiment of the present utility model;

[0054] Figure 16 This is an exploded schematic diagram of a power assembly provided by an embodiment of the present utility model;

[0055] Figure 17 It is an exploded schematic diagram of a power assembly provided by an embodiment of the present utility model.

[0056] Description of reference numerals:

[0057] 1000, aircraft;

[0058] 100. Power components;

[0059] 10. Motor; 11. Stator; 111. Shaft; 1111. First portion; 1112. Second portion; 112. First coupling portion; 113. Second coupling portion; 114. Mounting member; 115. Anti-dropping member; 116. Coil structure; 12. Rotor; 121. Main body; 1211. Magnetic structure; 1212. Connecting member; 1213. Yoke; 1214. Magnet; 122. Connecting portion; 123. First detachable coupling portion; 124. Chamber;

[0060] 20. Blade; 21. Blade body; 211. Blade tip; 212. Blade root; 22. Second detachable coupling portion; 221. Through portion; 23. Positioning portion; 231. Arc-shaped surface; 232. Recessed area; 233. First limiting surface; 234. Second limiting surface;

[0061] 30. Blade protection cover; 31. Accommodation space; 32. Protective member; 33. Support member; 331. Support portion; 332. First assembly portion; 333. Second assembly portion;

[0062] 40. Fixing member; 41. Fixing portion; 42. Limiting portion; 50. Supporting member;

[0063] 200, frame; 201, fuselage; 202, arm. DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0066] It should also be understood that the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0067] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0068] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0069] 1 , an embodiment of the present invention provides an aircraft 1000. The aircraft 1000 can be used in fields such as plant protection, aerial photography, express delivery, and search and rescue.

[0070] For example, aircraft 1000 may include a rotorcraft, a fixed-wing aircraft, a helicopter, or a fixed-wing-rotor hybrid aircraft. Rotorcraft include single-rotor aircraft or multi-rotor aircraft. Multi-rotor aircraft include two-rotor unmanned aerial vehicles, three-rotor unmanned aerial vehicles, four-rotor unmanned aerial vehicles, six-rotor unmanned aerial vehicles, eight-rotor unmanned aerial vehicles, ten-rotor unmanned aerial vehicles, or twelve-rotor unmanned aerial vehicles. The number of rotors may be an odd number or an even number, and is not specifically limited in this embodiment of the present application.

[0071] See also Figure 1(A) to Figure 2In some embodiments, the aircraft 1000 includes a power assembly 100 or a motor 10 , which is used to provide flight power for the aircraft 1000 .

[0072] 1(A), in some embodiments, aircraft 1000 further includes a frame 200, and a power assembly 100 or motor 10 is mounted on frame 200. Power assembly 100 includes motor 10 and propellers 20, and motor 10 is used to drive propellers 20 to rotate, thereby providing flight power for aircraft 1000.

[0073] 1 (A), in some embodiments, the power assembly 100 further includes a blade guard 30, the blade guard 30 is connected to the frame 200 and / or the stator 11 of the motor 10 (see Figure 4 The blade guard 30 is provided on the outside of the blade 20 and can provide protection, thereby reducing the probability of the blade 20 being damaged by direct collision with an obstacle, and reducing the risk of cuts to people or other objects caused by the rotation of the blade, thereby improving safety in use.

[0074] For example, referring to FIG1(A), the frame 200 includes a body 201, and the blade protection cover 30 is connected to the body 201. Of course, in other embodiments, referring to FIG1(A), the frame 200 includes a body 201, and the blade protection cover 30 is connected to the body 201. Figure 3 , the frame 200 includes a fuselage 201 and an arm 202, and the blade protection cover 30 is connected to the fuselage 201 through the arm 202. The number of blade protection covers 30 can be designed according to actual needs, such as one, two, three, four or more. For example, as shown in Figure 1 (B), a plurality of protection covers 30 can overlap with each other to form a columnar structure, and the axis of the columnar structure is approximately perpendicular to the heading axis of the aircraft 1000. Optionally, the protection cover 30 is a circular structure. In other embodiments, the blade protection cover 30 can also be omitted.

[0075] Referring to Figures 1(A) and 1(B), multiple power assemblies 100 are movably connected to the frame 200 via corresponding connecting mechanisms, allowing the multiple power assemblies 100 to be folded or unfolded. When folded, the power assemblies 100 effectively reduce the size of the aircraft 1000, making it easier to carry and store the aircraft 1000.

[0076] For example, taking the example of a power assembly 100 including four, the unfolded state of the power assembly 100 is shown in FIG1(A). The folded state of the power assembly 100 is shown in FIG1(B). In the unfolded state, the four power assemblies form a first group of power assemblies and a second group of power assemblies in pairs. The first group of power assemblies is located at the rear side of the frame 200 in the unfolded state, and the second group of power assemblies is located at the front side of the frame 200 in the unfolded state. The first group of power assemblies is folded first, and the second group of power assemblies is folded later to complete the folding of the four power assemblies. In the folded state, the second group of power assemblies is stacked on the outside of the first group of power assemblies.

[0077] Optionally, the connecting mechanism includes a first rotating shaft, and the plurality of power assemblies 100 can respectively rotate around the corresponding first rotating shaft, so that the plurality of power assemblies 100 can overlap with each other to form a coaxial power mechanism assembly. Optionally, the angle formed between the axial line of at least one first rotating shaft and the heading axis of the aircraft 1000 is an acute angle. Optionally, the plurality of power assemblies 100 can respectively rotate around the corresponding first rotating shaft in a set order, and overlap with each other to form a coaxial power mechanism assembly, and the axis of the power mechanism assembly is approximately perpendicular to the heading axis of the aircraft 1000. Optionally, the power mechanism assembly includes a cylindrical structure.

[0078] See also Figures 4 to 6 In some embodiments, a power assembly 100 includes a motor 10 and a propeller 20. The motor 10 includes a stator 11 and a rotor 12. The rotor 12 is rotatable relative to the stator 11 about a predetermined axis. The rotor 12 includes a main body 121, a connecting portion 122, and a first detachable coupling portion 123. The first detachable coupling portion 123 is connected to the main body 121 via the connecting portion 122. The propeller 20 includes a propeller body 21 and a second detachable coupling portion 22. One end of the propeller body 21 is a propeller tip 211, and the other end of the propeller body 21 is a propeller root 212. The second detachable coupling portion 22 is disposed at the propeller root 212 and is detachably connected to the first detachable coupling portion 123 to mount the propeller 20 on the motor 10, so that the rotor 12 can drive the propeller 20 to rotate. In which, the main body 121 is an annular structure, at least part of the first disassembly coupling part 123 is located outside the periphery of the main body 121, and at least part of the first disassembly coupling part 123 is arranged facing the peripheral outer surface of the main body 121, so that at least part of the propeller root 212 overlaps with the projection position of the main body 121 on the preset axis.

[0079] In the power assembly 100 of the above embodiment, the first detachable coupling portion 123 on the outer periphery of the main body 121 of the motor 10 is detachably connected to the second detachable coupling portion 22 on the root portion 212 of the blade 20. This allows the projected position of the root portion 212 of the blade 20 on the predetermined axis to at least partially overlap with the projected position of the main body 121 on the predetermined axis. This allows the blade 20 to share at least a portion of its axial height with the main body 121, fully utilizing the space within the axial height range of the main body 121. This reduces the overall axial dimension of the power assembly 100, facilitating a reduction in the space occupied by the aircraft 1000 including the power assembly 100 and facilitating a compact design for the aircraft 1000. Furthermore, because the first detachable coupling portion 123 and the second detachable coupling portion 22 are detachably connected, the blade 20 can be detachably connected to the motor 10. When at least one of the blade 20 and the motor 10 needs to be replaced or maintained, the blade 20 can be more conveniently detached from the motor 10 for easier replacement or maintenance. Since the first disassembly coupling portion 123 is located outside the periphery of the main body portion 121 of the motor 10, and at least a portion of the first disassembly coupling portion 123 is arranged facing the peripheral outer surface of the main body portion 121, when the aircraft 1000 has a blade protection cover 30, when the blade 20 is disassembled, the operating space for disassembly and assembly will not be restricted by the blade protection cover 30, so that the blade 20 can be disassembled and assembled without disassembling the blade protection cover 30, making the disassembly and assembly of the blade 20 more convenient.

[0080] In the related art, the blades 20 in the power assembly 100 are fixed above the motor 10, which increases the axial height occupied by the blades 20 and the motor 10. If multiple power mechanisms 100 are folded into a power mechanism assembly in the aforementioned manner, the overall envelope volume of the power mechanism assembly is positively correlated with the superposition of the axial heights of multiple power assemblies, thereby increasing the overall envelope volume of the power mechanism assembly, which is not conducive to the miniaturization design of the aircraft 1000. If the power assembly 100 also includes a blade guard 30, since the blade guard 30 is arranged around the outside of the blade 20 and the motor 10, the height of the blade guard 30 also needs to be adaptively increased to accommodate the blade 20 and the motor 10, thereby increasing the volume and weight of the blade guard 30. To this end, in the above embodiment, the blades 20 can share at least a portion of their axial height with the main body 121 of the motor 10, thereby reducing the overall axial dimension of the power assembly 100 and the envelope volume of the power mechanism assembly, thereby facilitating a reduction in the space occupied by the aircraft 1000 and facilitating a miniaturized design of the aircraft 1000. When the power assembly 100 includes the blade guard 30, this further facilitates a lightweight design of the aircraft 1000.

[0081] For example, the axial height or axial dimension refers to the height along the direction of the preset axis. The axial height range of the main body 121 is as follows: Figure 5 As shown in m. For example, the preset axis is as follows Figure 5 As shown by the dotted line n in .

[0082] See also Figures 7 to 9 In some embodiments, at least a portion of the blade root 212 overlaps with the projection position of the main body 121 on the preset axis, including: the projection position of the blade root 212 on the preset axis overlaps with the projection position of the main body 121 on the preset axis; or, a portion of the blade root 212 overlaps with the projection position of the main body 121 on the preset axis, and another portion of the blade root 212 does not overlap with the projection position of the main body 121 on the preset axis, such as Figure 7 The projection position of the blade root 212 on the preset axis overlaps with the projection position of the main body 121 on the preset axis, including at least one of the following situations: the projection position of the blade root 212 on the preset axis completely overlaps with the projection position of the main body 121 on the preset axis; the axial length of the projection position of the blade root 212 on the preset axis is less than the axial length of the projection position of the main body 121 on the preset axis, that is, the blade root 212 is located within the axial height range of the main body 121, as shown in FIG. Figure 8 As shown; the axial length of the blade root 212 at the projected position of the preset axis is greater than the axial length of the main body 121 at the projected position on the preset axis, that is, the main body 121 is located within the axial height range of the blade root 212, as shown Figure 9 shown.

[0083] Exemplarily, the axial height of the propeller root 212 can be less than or equal to the axial height of the main body 121, and the projection position of the propeller root 212 on the preset axis overlaps with the projection position of the main body 121 on the preset axis, so that the blade 20 can share as much axial height as possible with the main body 121, so that after the propeller root 212 is connected to the motor 10, the axial height jointly occupied by the propeller root 212 and the main body 121 is as small as possible, thereby reducing the axial height of the power assembly 100 as much as possible.

[0084] Exemplarily, the axial height of the blade root portion 212 may be less than or equal to the axial height of the main body portion 121 ; alternatively, the axial height of the blade root portion 212 may also be greater than the axial height of the main body portion 121 .

[0085] The detachable connection between the first detachable coupling portion 123 and the second detachable coupling portion 22 may include at least one of the following: threaded connection, magnetic connection, screw locking connection, snap connection, interference fit connection, etc.

[0086] See also Figure 5 and Figure 6 In some embodiments, the power assembly 100 further includes a fixing member 40, through which the second detachable coupling portion 22 is detachably connected to the first detachable coupling portion 123, allowing the blade 20 to rotate synchronously with the rotor 12. The projected position of the fixing member 40 on the predetermined axis and the projected position of the main body 121 on the predetermined axis at least partially overlap, so that the fixing member 40 and the main body 121 can share at least a portion of the axial height. When the blade 20 is connected to the motor 10, the axial height jointly occupied by the fixing member 40 and the main body 121 can be minimized, fully utilizing the space within the axial height range of the main body 121, thereby further reducing the overall axial size of the power assembly 100.

[0087] See also Figures 10 to 12 In some embodiments, the projection position of the fixing member 40 on the preset axis overlaps with the projection position of the main body 121 on the preset axis, including: the projection position of the fixing member 40 on the preset axis overlaps with the projection position of the main body 121 on the preset axis; or, a portion of the fixing member 40 overlaps with a portion of the main body 121 on the preset axis, and another portion of the fixing member 40 does not overlap with the projection position of the main body 121 on the preset axis, such as Figure 10 The projection position of the fixing member 40 on the preset axis overlaps with the projection position of the main body 121 on the preset axis, including: the projection position of the fixing member 40 on the preset axis completely overlaps with the projection position of the main body 121 on the preset axis; the axial length of the projection position of the fixing member 40 on the preset axis is less than the projection position of the main body 121 on the preset axis, that is, the fixing member 40 is located within the axial height range of the main body 121, as shown in FIG. Figure 11 The axial length of the fixing member 40 at the projection position of the preset axis is greater than the projection position of the main body 121 on the preset axis, that is, the main body 121 is located within the axial height range of the fixing member 40, as shown Figure 12 shown.

[0088] Exemplarily, the axial height of the fixing member 40 may be less than or equal to the axial height of the main body 121 ; or, the axial height of the fixing member 40 may be greater than the axial height of the main body 121 .

[0089] Exemplarily, the fixing member 40 includes at least one of the following: a screw, a magnetic structure or other quick-release structure.

[0090] Exemplarily, the fixing member 40 passes through the first detachable coupling portion 123 and the second detachable coupling portion 22 to achieve the connection between the first detachable coupling portion 123 and the second detachable coupling portion 22 .

[0091] Exemplarily, one of the first detachable coupling portion 123 and the second detachable coupling portion 22 includes a threaded hole, and the other includes a through hole. The fixing member 40 is provided with the through hole and the threaded hole to achieve a detachable connection between the blade 20 and the motor 10.

[0092] See also Figure 5 and Figure 6 In some embodiments, the connecting portion 122 extends radially along the main body 121, and the first disassembly coupling portion 123 is protruding from the connecting portion 122. The first disassembly coupling portion 123 is at least partially disposed on the outer periphery of the main body 121. In this way, the projection position of the connecting portion 122 on the preset axis can be at least partially located within the axial height range of the main body 121, so that the connecting portion 122 can at least partially share the axial height with the main body 121, thereby further reducing the axial height of the power assembly 100, which is more conducive to reducing the occupied space of the aircraft 1000 and achieving a miniaturized design. For example, the connecting portion 122 can be integrally formed with at least a portion of the main body 121; alternatively, the connecting portion 122 can be provided separately from at least a portion of the main body 121.

[0093] See also Figure 6 In some embodiments, the first detachable coupling portions 123 include a plurality of first detachable coupling portions 123, each of which is evenly spaced along the circumference of the main body 121. This arrangement facilitates more uniform spacing of the blades 20 connected to each first detachable coupling portion 123 along the circumference of the main body 121, effectively ensuring the dynamic balance of the blades 20.

[0094] See also Figure 6 In some embodiments, the first detachable coupling portion 123 includes a plurality of blades 20 connected to each first detachable coupling portion 123 , and the blades 20 are arranged at equal intervals along the circumference of the main body 121 to effectively ensure the dynamic balance of the blades 20 .

[0095] See also Figure 14 In some embodiments, the blade root 212 is provided with a positioning portion 23, and the positioning portion 23 cooperates with the outer peripheral edge of the main body 121, and / or the positioning portion 23 can cooperate with the connecting portion 122 and / or the first disassembly coupling portion 123 to position the blade 20, so that the blade 20 extends radially along the main body 121, so as to ensure that the installation position of the blade 20 is more precise, thereby providing a guarantee for the blade 20 to have good dynamic balance.

[0096] The structure and / or shape of the positioning portion 23 can be designed according to actual needs. For example, the positioning portion 23 includes a curved surface 231, and the curved surface 231 abuts against the peripheral outer wall of the main body 121. With this arrangement, the structure of the positioning portion 23 is simple, and the positioning effect of the blade 20 is good. For example, the number of blades 20 can include one or more. For example, the number of blades 20 includes multiple, and the root portion 212 of each blade 20 is correspondingly provided with at least one positioning portion 23 to achieve positioning of each blade 20 and ensure the dynamic balance of each blade 20.

[0097] See also Figure 13 In some embodiments, the arcuate surface 231 is formed with a recessed area 232 that is recessed away from the main body 121. This helps reduce the difficulty of processing and save material while ensuring the positioning accuracy of the blade 20. It also reduces the contact area between the arcuate surface 231 and the main body 121, thereby reducing friction between the positioning portion 23 and the main body 121, making it easier for users to disassemble and assemble.

[0098] See also Figure 13 In some embodiments, the recessed area 232 is formed in the middle of the arc surface 231. While ensuring that the arc surface 231 can abut and cooperate with the main body 121 to position the blade 20, it can take into account the positioning effect of the positioning portion 23 and reduce the friction between the positioning portion 23 and the main body 121.

[0099] See also Figure 14 In some embodiments, positioning portion 23 can cooperate with connecting portion 122 and / or first detachable coupling portion 123 to position blade 20. For example, positioning portion 23 includes two first and second limiting surfaces 233 and 234 spaced apart from each other. At least a portion of connecting portion 122 is located between first and second limiting surfaces 233 and 234, so that first and second limiting surfaces 233 and 234 can limit connecting portion 122, thereby limiting the position of blade 20. Precise positioning of blade 20 can be achieved without interfering with positioning portion 23 of other blades 20, effectively ensuring the dynamic balance of blade 20.

[0100] See also Figure 6In some embodiments, the fixing member 40 includes a fixing portion 41 and a limiting portion 42. One end of the fixing portion 41 is connected to the limiting portion 42, and the other end of the fixing portion 41 sequentially passes through the blade 20 and the first detachable coupling portion 123 to mechanically couple the blade 20. The limiting portion 42 is used to limit the movement of the blade 20 in a direction parallel to the predetermined axis. For example, the other end of the fixing portion 41 sequentially passes through the second detachable coupling portion 22 and the first detachable coupling portion 123 to achieve mechanical coupling between the blade 20 and the rotor 12. This allows the fixing member 40 to share at least a portion of the axial height of the second detachable coupling portion 22 and the first detachable coupling portion 123, further reducing the axial height of the power assembly 100. The limiting portion 42 limits the movement of the blade 20 in a direction parallel to the predetermined axis, thereby reducing the vertical flapping of the blade 20 along the predetermined axis and reducing the space reserved for the vertical flapping of the blade 20, thereby reducing the axial height of the power assembly 100 to a certain extent.

[0101] See also Figure 13 In some embodiments, the second detachable coupling portion 22 is provided with a through portion 221. The fixing portion 41 sequentially passes through the through portion 221 and the first detachable coupling portion 123. The maximum outline dimension of the limiting portion 42 is greater than the maximum outline dimension of the through portion 221, so that the limiting portion 42 can limit the movement of the blade 20 in a direction parallel to the predetermined axis. Exemplarily, the through portion 221 includes a through hole.

[0102] See also Figure 5 and Figure 6 In some embodiments, the surface of the limiting portion 42 near the fixing portion 41 abuts against the blade 20. This can effectively reduce the amount of up and down swinging of the blade 20 along the preset axis, minimize the space reserved for up and down swinging of the blade 20, and further reduce the axial height of the power assembly 100. The reduction in the amount of up and down swinging of the blade 20 along the preset axis can also effectively reduce the wear of the through portion 221 and the fixing portion 41, thereby extending the service life. Exemplarily, the surface of the limiting portion 42 near the fixing portion 41 abuts against the root portion 212 of the blade 20 or the first detachable coupling portion 123. Exemplarily, the side periphery of the limiting portion 42 can abut against the blade 20 to further reduce the amount of up and down swinging of the blade 20 along the preset axis. In other embodiments, the side periphery of the limiting portion 42 may not abut against the blade 20.

[0103] See also Figure 15In some embodiments, power assembly 100 further includes a blade guard 30. Blade guard 30 defines a receiving space 31 within which motor 10 and propellers 20 are positioned. Thus, blade guard 30 provides protection. Furthermore, since the axial dimensions occupied by motor 10 and propellers 20 are reduced, the axial dimensions of blade guard 30 can also be adaptively reduced, thereby reducing the size and weight of the blade guard. This effectively reduces the space occupied by aircraft 1000 and improves the endurance of aircraft 1000. In the case of having a blade guard 30, since the first disassembly coupling portion 123 is located outside the periphery of the main body 121 of the motor 10, and at least a portion of the first disassembly coupling portion 123 is arranged facing the peripheral outer surface of the main body 121, when disassembling and assembling the blade 20, the blade guard 30 will not limit the operating space for disassembly and assembly, so that the blade 20 can be disassembled and assembled without disassembling the blade guard 30, making the disassembly and assembly of the blade 20 more convenient.

[0104] See also Figure 15 In some embodiments, the blade guard 30 includes a protective member 32 and a support member 33. The protective member 32 is an annular structure to form a duct; the first coupling portion 112 and / or the second coupling portion 113 are connected to the protective member 32 via the support member 33. The protective member 32 can provide protection, reducing the probability of the blades 20 or the power assembly 100 directly colliding with obstacles and damaging the blades 20 or the power assembly 100, and reducing the safety risk of the blades 20 or the power assembly 100 causing damage to people or other objects when rotating. For example, the support member 33 can also provide protection to a certain extent, preventing the blades 20 or the power assembly 100 from easily damaging people or other objects. The protective member 32 is an annular structure to form a duct, thereby improving the power efficiency of the motor 10 and the blades 20, thereby improving the endurance of the aircraft 1000.

[0105] See also Figure 15 In some embodiments, the support member 33 includes a plurality of support portions 331, which are arranged at intervals along the radial direction of the duct. One end of each support portion 331 is fixedly connected to the protective member 32, and the other end of each support portion 331 is fixedly connected to the first coupling portion 112 or the second coupling portion 113. The provision of multiple support portions 331 is conducive to improving the mechanical properties of the blade guard 30, and can also protect the blades 20 and / or the motor 10 in the direction of the preset axis, preventing the blades 20 and / or the motor 10 from easily damaging people or other objects, thereby improving the safety of the power assembly 100. In addition, the spacing left between the multiple support portions 331 facilitates the disassembly of the blades 20 and / or the motor 10, making the disassembly and assembly of the blades 20 and / or the motor 10 convenient. Optionally, the support portion 331 includes a spoke structure or a wire structure.

[0106] See also Figure 5 In some embodiments, a first coupling portion 112 and a second coupling portion 113 are provided at both ends of the stator 11 along a predetermined axis. The first coupling portion 112 and the second coupling portion 113 are respectively connected to different portions of the blade guard 30. In this way, both ends of the stator 11 along the predetermined axis can be connected to different portions of the blade guard 30, achieving a double-end connection or support for the motor 10, improving connection rigidity, and facilitating enhanced reliability of the motor 10 or power assembly 100.

[0107] In a traditional motor, the motor's shaft is part of the rotor, and the motor's base is part of the stator. The motor's base provides a single-end support interface and is therefore only suitable for single-sided support. To this end, in the embodiment of the present application, the stator 11 can provide a first coupling portion 112 and a second coupling portion 113. These two coupling portions can be connected to the ends of the duct, respectively. The duct is then connected to the aircraft's fuselage via a connecting mechanism, thereby meeting the dual-end support interface requirements of the aircraft's power assembly.

[0108] Furthermore, since the interface requirements of double-end support must be met, it may be inconvenient to install the blades at the interface of the double-end support. Therefore, the setting position of the blades is flexibly designed in the embodiment of the present application, and the root of the blade can be set on the outer side of the periphery of the main body of the motor, so as to achieve double-end support without affecting the reliable installation of the blades, so as to ensure that the connection stiffness and flight power requirements are met at the same time. In addition, when a double-end supported interface is provided in the axial direction of the main body 121 of the motor 10 to connect the blade guard 30, the blade guard 30 may close the axial space of the main body of the motor 10 or reduce the axial gap. Since the first disassembly coupling portion 123 is located outside the periphery of the main body 121 of the motor 10, and at least a part of the first disassembly coupling portion 123 is arranged facing the peripheral outer surface of the main body 121, when disassembling and assembling the blade 20, the operating space for disassembly and assembly will not be restricted by the blade guard 30, and thus the blade 20 can be disassembled and assembled without disassembling the blade guard 30, making the disassembly and assembly of the blade 20 more convenient.

[0109] See also Figure 5In some embodiments, the stator 11 includes a shaft 111, which passes through a main body 121, so that the stator 11 can be provided with a first coupling portion 112 and a second coupling portion 113. The provision of the shaft 111 allows the stator 11 to be provided with the first coupling portion 112 and the second coupling portion 113 at both ends along a preset axis. The shaft 111 passing through the main body 121 not only provides a double-end support interface, but also allows the shaft 11 to share at least part of the axial height with the main body 121, which is beneficial for reducing the axial size of the motor 10, and further beneficial for reducing the axial size of the power assembly 100. Exemplarily, the preset axis is the axis of the shaft 111.

[0110] See also Figure 15 Exemplarily, the support member 33 includes a first assembly portion 332 and a second assembly portion 333. The first assembly portion 332 and the second assembly portion 333 are spaced apart along a preset axis. A portion of the plurality of support portions 331 is connected to the first assembly portion 332, and another portion of the plurality of support portions 331 is connected to the second assembly portion 333. The first assembly portion 332 is connected to the first coupling portion 112, and the second assembly portion 333 is connected to the second coupling portion 113, so that the motor 10 can be connected or supported at both ends, which is beneficial to improving the reliability of the motor 10 or the power assembly 100. The protective member 32, the first assembly portion 332, the second assembly portion 333, and the plurality of support portions 331 cooperate to form the accommodating space 31. Exemplarily, the number of support portions 331 connected to the first assembly portion 332 includes at least two, and at least two support portions 331 radiate from the first assembly portion 332 ; the number of support portions 331 connected to the second assembly portion 333 includes at least two, and the at least two support portions 331 radiate from the second assembly portion 333 .

[0111] The structure, shape, and number of the first coupling portion 112 and the second coupling portion 113 can be designed according to actual needs. For example, the number of the first coupling portion 112 can be one, two, three, or more. The number of the second coupling portion 113 can be one, two, three, or more.

[0112] The first coupling portion 112 may have the same structure and / or shape as the second coupling portion 113; or, the first coupling portion 112 may have a different structure and / or shape than the second coupling portion 113, which is not limited here. The connection method between the first coupling portion 112 and the blade guard 30 includes at least one of the following: quick-release connection, threaded connection, wire fastening connection, glue connection, etc. The connection method between the second coupling portion 113 and the blade guard 30 includes at least one of the following: screw locking connection, threaded connection, wire fastening connection, glue connection, etc. Exemplarily, the first coupling portion 112 includes at least one of the following: a threaded hole, a threaded column, a through hole, a structure for connecting to a connecting line (such as a hook, a hole or a column), etc. The second coupling portion 113 includes at least one of the following: a threaded hole, a threaded column, a through hole, a structure for connecting to a connecting line (such as a hook, a hole or a column), etc.

[0113] See also Figure 5 In some embodiments, the stator 11 further includes at least one mounting member 114 , the mounting member 114 is connected to one end of the shaft 111 , and the first coupling portion 112 and / or the second coupling portion 113 are disposed on the at least one mounting member 114 .

[0114] The number of mounting members 114 may include one, two, or more. For example, the number of mounting members 114 is one, one of the first coupling portion 112 and the second coupling portion 113 is provided on the mounting member 114, and the other of the first coupling portion 112 and the second coupling portion 113 is provided on the shaft body 111. For another example, the number of mounting members 114 is two, the two mounting members 114 are respectively connected to the two ends of the shaft body 111, one of the first coupling portion 112 and the second coupling portion is provided on one of the mounting members 114, and the other of the first coupling portion 112 and the second coupling portion 113 is provided on the other mounting member 114. The mounting member 114 may include at least one of the following: a flange structure, a seat structure, or any other suitable structure.

[0115] See also Figure 5 and Figure 16Exemplarily, the stator 11 includes a mounting member 114a, a first coupling portion 112 is provided at one end of the shaft 111 away from the mounting member 114a, and a second coupling portion 113 is provided at one end of the shaft 111 away from the first coupling portion 112 and / or the mounting member 114a. The shaft 111 includes a first portion 1111 and a second portion 1112, one end of the second portion 1112 is connected to the first portion 1111, and the other end of the second portion 1112 is passed through the mounting member 114a. The maximum outline dimension of the first portion 1111 is greater than the maximum outline dimension of the second portion 1112, and the first portion 1111 can be used to axially limit the shaft 111 and / or the mounting member 114a. The power assembly 100 also includes an anti-slip member 115, which is connected to one end of the shaft 111, and the anti-slip member 115 is used to axially limit the shaft 111 and / or the supporting member 50. Exemplarily, the anti-slip component 115 and the mounting component 114a are respectively connected to the two ends of the shaft body 111. The first part 1111 can limit the shaft body 111 and / or the mounting component 114a along one of the positive direction and the negative direction of the preset axis. The anti-slip component 115 can limit the shaft body 111 and / or the supporting component 50 along the other of the positive direction and the negative direction of the preset axis to prevent the shaft body 111 from loosening and improve the connection reliability of the power component 100.

[0116] See also Figure 17 For example, the stator 11 includes a mounting member 114a and a mounting member 114b. The first coupling portion 112 is provided at one end of the shaft 111 away from the mounting member 114a and / or the mounting member 114b. The second coupling portion 113 is provided at one end of the shaft 111 away from the first coupling portion 112 and / or the mounting member 114a. The shaft 111 includes a first portion 1111 and a second portion 1112. One end of the second portion 1112 is connected to the first portion 1111, and the other end of the second portion 1112 is passed through the mounting member 114a and the mounting member 114b in sequence. The maximum outline dimension of the first portion 1111 is greater than the maximum outline dimension of the second portion 1112. The first portion 1111 can be used to axially limit the shaft 111 or the mounting member 114a. The power assembly 100 also includes an anti-slip component 115, which is connected to one end of the shaft body 111. The first part 1111 can limit the shaft body 111 and / or the mounting component 114a along one of the positive and negative directions of the preset axis. The anti-slip component 115 can limit the shaft body 111 and / or the mounting component 114b along the other of the positive and negative directions of the preset axis to prevent the shaft body 111 from loosening, thereby improving the connection reliability of the power assembly 100.

[0117] Exemplarily, the anti-slip member 115 includes an anti-slip ring or any other suitable anti-slip structure. The connection between the anti-slip member 115 and the shaft 111 includes at least one of the following: welding, threaded connection, snap connection, screw locking connection, etc.

[0118] See also Figure 6 and Figure 16 For example, one of the stator 11 and the main body 121 includes a coil structure 116, and the other includes a magnetic structure 1211. For example, the stator 11 includes the coil structure 116, and the main body 121 includes the magnetic structure 1211. When energized, the coil structure 116 can cooperate with the magnetic structure 1211 to generate a magnetic force to drive the rotor 12 to rotate. The coil structure 116 is provided on the mounting member 114a.

[0119] See also Figure 16 or Figure 17 , combined with Figure 6 Exemplarily, the main body 121 includes a magnetic structure 1211 and a connector 1212, and the magnetic structure 1211 is provided on the connector 1212. The connector 122 extends radially along the main body 121. The connector 122 can be integrally formed with the connector 1212, or the connector 122 can be separately provided with the connector 1212. The magnetic structure 1211 includes a magnet 1214 and a yoke 1213, and the yoke 1213 and the magnet 1214 are provided on the connector 1212. The yoke 1213 and the connector 1212 together form the outer contour of the annular structure of the main body 121. Exemplarily, the positioning portion 23 cooperates with the outer peripheral edge of the yoke 1213 to position the blade 20. Exemplarily, the peripheral outer surface of the main body 121 includes the peripheral outer surface of the connector 1212 and the peripheral outer surface of the yoke 1213.

[0120] See also Figure 5 and Figure 16 Exemplarily, the power assembly 100 further includes a supporting member 50, which is used to connect the stator 11 and the rotor 12. The rotor 12 is provided with a chamber 124 for accommodating the supporting member 50. The shaft 111 passes through the chamber 124. The supporting member 50 is provided between the rotor 12 and the shaft 111. The supporting member 50 can provide a certain support or supporting effect on the rotor 12, so that the rotor 12 is more reliable and stable when rotating relative to the stator 11. Exemplarily, the supporting member 50 may include but is not limited to bearings. The number of supporting members 50 can be designed according to actual needs, such as one, two, three or more. Exemplarily, the chamber 124 is formed in the connecting member 1212.

[0121] Illustratively, the power assembly 100 of this embodiment is suitable for a blade guard 30 with a double-end assembly portion in an aircraft 1000 , meeting the design requirements of a motor and blade that is scratch-free and highly reliable.

[0122] Exemplarily, the rotor 12 includes a yoke 1231, a magnet 1214, a connector 1212, and a first disassembly coupling portion 123. The supporting member 50 serves as a component for connecting the stator 11 and the rotor 12. The stator 11 includes a shaft 111, a mounting member 114, a coil structure 116, and an anti-slip member 115. The blade 20 is connected to the rotor 12 through a fixing member 40. Among them, a threaded hole is opened on the shaft 111 (corresponding to the above-mentioned first coupling portion 112), and a threaded hole is opened on the mounting member 114 (corresponding to the above-mentioned second coupling portion 113), so that the motor 10 has a double-end support interface. The yoke 1231 is completed by a stamping process, the iron core of the coil structure 116 is completed by riveting silicon steel sheets, the coil of the coil structure 116 is arranged on the iron core, and the magnet 1214 can be completed by sintering. The connector 1212, the mounting member 114 and the shaft 111 can be completed by turning and milling machining processes. The outer ring of the shaft body 111 is welded to the inner ring of the anti-slip component 115 to prevent the shaft system from slipping off and enhance the reliability of the shaft system.

[0123] For example, shaft 111 is part of stator 10 and is fixedly connected to anti-slip member 115 and mounting member 114. The inner ring of support member 50 has a clearance fit with shaft 111, while the outer ring of support member 50 has an interference fit with connector 1212, thereby connecting stator 10 to rotor 20. Cavity 124 is designed in connector 1212, not in mounting member 114.

[0124] Exemplarily, the blade 20 is formed by injection molding. The positioning portion 23 (such as the arc surface 231) provided at the root portion 212 of the blade 20 is transitionally matched with the yoke 1231 to ensure the radial position symmetry accuracy of the two blades 20, thereby ensuring their dynamic balance; at the same time, a recessed area 232 is formed in the middle of the positioning portion 23 (such as the arc surface 231) to facilitate user disassembly and assembly. The blade 20 is fixed to the first disassembly coupling portion 123 of the motor 10 by the fixing member 40. The end face of the fixing member 40 is tightly against the blade 20 and locked, which can effectively reduce the swinging amount of the blade 20, compress the envelope volume of the blade 20, and reduce the stacking space of the entire machine. The assembly process of the blade 20: the blade 20 is first placed on the first disassembly coupling portion 123, and the positioning portion 23 cooperates with the yoke 1213 for precise positioning, and is symmetrically distributed around the motor 10; the blade 20 is locked to the first disassembly coupling portion 123 of the motor 10 by the fixing member 40 to complete the installation.

[0125] For example, the double-end support interface structure in the stator shaft system of the motor 10 can have various forms, and the anti-slip member 115 and the mounting member 114 can have various structural designs, such as: 1) Double-end flange threaded connection: The first coupling portion 112 and the second coupling portion are designed on the upper flange structure and / or the lower flange structure; the upper flange structure corresponds to the aforementioned mounting member 114a, and the lower flange structure corresponds to the aforementioned mounting member 114b. 2) Double-end flange wire fixation: The connection method between the motor 10 and the blade guard 30 includes at least one of the following: threaded fixation, wire connection, glue connection, etc.

[0126] For example, a positioning portion 23 is designed at the root 212 of the blade 20. The positioning portion 12 may include an arc shape. The positioning portion 12 is precisely positioned with the yoke 1213 to ensure radial symmetry of the blade 20, thereby reducing its dynamic imbalance. After ensuring the dynamic balance, the fixing member 40 can lock the blade 20. Regarding the fixing method of the first disassembly coupling portion 123 of the blade 20 and the motor 10, in addition to including an arc shape, the positioning portion 12 may also be designed with a rectangular groove positioning portion 12 at the root 212 of the blade 20. The rectangular groove positioning portion 12 cooperates with the connecting portion 122 to ensure its dynamic balance. The rectangular groove includes the aforementioned first limiting surface 233 and the second limiting surface 234.

[0127] See also Figures 4 to 6 , an embodiment of the present invention further provides a motor 10, comprising a stator 11 and a rotor 12, the rotor 12 being capable of rotating relative to the stator 11 around a preset axis, the rotor 12 comprising a main body 121, a connecting portion 122 and a first detachable coupling portion 123, the first detachable coupling portion 123 being connected to the main body 121 through the connecting portion 122; wherein the first detachable coupling portion 123 is used to be detachably connected to the second detachable coupling portion 22 of the blade 20, the blade 20 comprising a paddle body 21, one end of the paddle body 21 being a paddle tip portion 211, and the other end being a paddle root portion 212, the second detachable coupling portion 22 being arranged at the paddle root portion 212; the main body 121 is an annular structure, at least a portion of the first detachable coupling portion 123 is located outside the periphery of the main body 121, and at least a portion of the first detachable coupling portion 123 is arranged facing the peripheral outer surface of the main body 121, so that at least a portion of the paddle root portion 212 overlaps with the projection position of the main body 121 on the preset axis.

[0128] In the motor 10 of the above embodiment, the first detachable coupling portion 123 on the outer periphery of the main body 121 of the motor 10 is detachably connected to the second detachable coupling portion 22 on the root portion 212 of the blade 20. This allows the projected position of the root portion 212 of the blade 20 on the predetermined axis to at least partially overlap with the projected position of the main body 121 on the predetermined axis. This allows the blade 20 to share at least a portion of its axial height with the main body 121, fully utilizing the space within the axial height range of the main body 121. This reduces the overall axial dimension of the power assembly 100, facilitating a reduction in the space occupied by the aircraft 1000 including the power assembly 100 and facilitating a compact design for the aircraft 1000. Furthermore, due to the detachable connection between the first detachable coupling portion 123 and the second detachable coupling portion 22, the blade 20 can be detachably connected to the motor 10. When at least one of the blade 20 and the motor 10 needs to be replaced or maintained, the blade 20 can be more conveniently detached from the motor 10 for easier replacement or maintenance. Since the first disassembly coupling portion 123 is located outside the periphery of the main body portion 121 of the motor 10, and at least a portion of the first disassembly coupling portion 123 is arranged facing the peripheral outer surface of the main body portion 121, when the aircraft 1000 has a blade protection cover 30, when the blade 20 is disassembled, the operating space for disassembly and assembly will not be restricted by the blade protection cover 30, so that the blade 20 can be disassembled and assembled without disassembling the blade protection cover 30, making the disassembly and assembly of the blade 20 more convenient.

[0129] In the related art, the blades 20 in the power assembly 100 are fixed above the motor 10, which increases the axial height occupied by the blades 20 and the motor 10. If multiple power mechanisms 100 are folded into a power mechanism assembly in the aforementioned manner, the overall envelope volume of the power mechanism assembly is positively correlated with the superposition of the axial heights of multiple power assemblies, thereby increasing the overall envelope volume of the power mechanism assembly, which is not conducive to the miniaturization design of the aircraft 1000. If the power assembly 100 also includes a blade guard 30, since the blade guard 30 is arranged around the outside of the blade 20 and the motor 10, the height of the blade guard 30 also needs to be adaptively increased to accommodate the blade 20 and the motor 10, thereby increasing the volume and weight of the blade guard 30. To this end, in the above embodiment, the blades 20 can share at least a portion of their axial height with the main body 121 of the motor 10, thereby reducing the overall axial dimension of the power assembly 100 and the envelope volume of the power mechanism assembly, thereby facilitating a reduction in the space occupied by the aircraft 1000 and facilitating a miniaturized design of the aircraft 1000. When the power assembly 100 includes the blade guard 30, this further facilitates a lightweight design of the aircraft 1000.

[0130] Illustratively, the motor 10 includes the motor 10 of any of the foregoing embodiments. The stator 11 includes the stator 11 of any of the foregoing embodiments. The rotor 12 includes the rotor 12 of any of the foregoing embodiments. The main body 121 may include the main body 121 of any of the foregoing embodiments. The connecting portion 122 may include the connecting portion 122 of any of the foregoing embodiments. The first detachable coupling portion 123 may include the first detachable coupling portion 123 of any of the foregoing embodiments. The blade 20 includes the blade 20 of any of the foregoing embodiments. The paddle body 21 includes the paddle body 21 of any of the foregoing embodiments. The second detachable coupling portion 22 may include the second detachable coupling portion 22 of any of the foregoing embodiments.

[0131] In the present invention, unless otherwise expressly specified or limited, the terms "installed", "connected", "connected", "mechanically coupled" and "coupled" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrally connected. They can be mechanically connected or electrically connected. They can be directly connected or indirectly connected through an intermediate medium. They can be internal communication between two elements or an interactive relationship between two elements. The mechanical coupling or coupling of two components includes direct coupling and indirect coupling, for example, direct fixed connection, connection through a transmission mechanism, etc. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0132] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0133] The disclosure above provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described above. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0134] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific method steps, features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific method steps, features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0135] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A power assembly, characterized in that: include: A motor, comprising a stator and a rotor, wherein the rotor is rotatable relative to the stator about a predetermined axis, the rotor comprising a main body, a connecting portion, and a first detachable coupling portion, wherein the first detachable coupling portion is connected to the main body via the connecting portion; and The propeller comprises a propeller body and a second detachable coupling portion, wherein one end of the propeller body is a propeller tip portion and the other end is a propeller root portion, and the second detachable coupling portion is provided at the propeller root portion, and the second detachable coupling portion is detachably connected to the first detachable coupling portion to mount the propeller on the motor so that the rotor can drive the propeller to rotate; In which, the main body is an annular structure, at least part of the first disassembly coupling part is located outside the periphery of the main body, and at least part of the first disassembly coupling part is arranged facing the peripheral outer surface of the main body, so that at least part of the propeller root overlaps with the projection position of the main body on the preset axis.

2. The power assembly according to claim 1, characterized in that: Also included is a fixing member, wherein the second detachable coupling portion is detachably connected to the first detachable coupling portion via the fixing member, so that the blade can rotate synchronously with the rotor; There is at least a partial overlap between the projection position of the fixing member on the preset axis and the projection position of the main body on the preset axis.

3. The power assembly according to claim 1, characterized in that: The connecting portion extends along the radial direction of the main body portion, the first detachable coupling portion is protruded from the connecting portion, and the first detachable coupling portion is at least partially arranged outside the periphery of the main body portion.

4. The power assembly according to claim 1, characterized in that: The first detachable coupling portion includes a plurality of; The first detachable coupling portions are respectively arranged at equal intervals along the circumference of the main body; and / or, The blades connected to the first detachable coupling parts are respectively arranged at equal intervals along the circumference of the main body.

5. The power assembly according to claim 1, characterized in that: The root of the propeller is provided with a positioning portion, which cooperates with the outer side of the periphery of the main body, and / or the positioning portion can cooperate with the connecting portion and / or the first disassembly coupling portion to position the blade so that the blade extends radially along the main body.

6. The power assembly according to claim 5, characterized in that: The positioning portion includes an arcuate surface, and the arcuate surface abuts against the peripheral outer wall of the main body.

7. The power assembly according to claim 5, characterized in that: The positioning portion includes a first limiting surface and a second limiting surface that are relatively spaced apart from each other, and at least a portion of the connecting portion is located between the first limiting surface and the second limiting surface.

8. The power assembly according to claim 6, characterized in that: The arc-shaped surface forms a recessed area, and the recessed area is recessed in a direction away from the main body.

9. The power assembly according to claim 8, characterized in that: The recessed area is formed in the middle of the arc-shaped surface.

10. The power assembly according to claim 2, characterized in that: The fixing member includes a fixing portion and a limiting portion, one end of the fixing portion is connected to the limiting portion, and the other end of the fixing portion passes through the blade and the first disassembly coupling portion in sequence for mechanical coupling, and the limiting portion is used to limit the movement of the blade in a direction parallel to the preset axis.

11. The power assembly according to claim 10, characterized in that: The second detachable coupling portion is provided with a through portion, the fixing portion passes through the through portion and the first detachable coupling portion in sequence, and the maximum outline dimension of the limiting portion is larger than the maximum outline dimension of the through portion; and / or, A surface of the limiting portion close to the fixing portion abuts against the blade.

12. The power assembly according to any one of claims 1 to 11, characterized in that: It also includes a blade protection cover, which is formed with a receiving space, and the motor and the blades are arranged in the receiving space.

13. The power assembly according to claim 12, characterized in that: The stator is provided with a first coupling portion and a second coupling portion at two ends along the preset axis, respectively. The first coupling portion and the second coupling portion are connected to different portions of the blade protection cover, respectively.

14. The power assembly according to claim 13, characterized in that: The stator includes a shaft body, and the shaft body passes through the main body, so that the stator can be provided with the first coupling part and the second coupling part.

15. The power assembly according to claim 14, characterized in that The stator further includes at least one mounting member connected to one end of the shaft, and the first coupling portion and / or the second coupling portion are disposed on the at least one mounting member.

16. The power assembly according to claim 13, characterized in that The blade protection cover includes a protection member and a support member. The protection member is an annular structure to form a duct. The first coupling portion and / or the second coupling portion is connected to the protection member through the support member.

17. The power assembly according to claim 16, characterized in that The support member includes a plurality of support portions, which are arranged at intervals along the radial direction of the duct. One end of each support portion is fixedly connected to the protective member, and the other end is fixedly connected to the first coupling portion or the second coupling portion.

18. A motor, characterized in that: include: The rotor comprises a stator and a rotor, wherein the rotor is rotatable relative to the stator around a preset axis, and the rotor comprises a main body, a connecting portion, and a first detachable coupling portion, wherein the first detachable coupling portion is connected to the main body via the connecting portion; The first detachable coupling portion is used to be detachably connected to the second detachable coupling portion of the blade, the blade includes a blade body, one end of the blade body is a blade tip portion, and the other end is a blade root portion, and the second detachable coupling portion is provided at the blade root portion; The main body is annular in structure, at least part of the first disassembly coupling part is located outside the periphery of the main body, and at least part of the first disassembly coupling part is arranged facing the peripheral outer surface of the main body, so that at least part of the propeller root overlaps with the projection position of the main body on the preset axis.

19. An aircraft, characterized in that: include: frame; as well as The power assembly according to any one of claims 1 to 17 or the motor according to claim 18, wherein the power assembly or the motor is mounted on the frame, and the power assembly or the motor is used to provide flight power for the aircraft.

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