Rotor assembly of air conditioner fan motor, air conditioner fan motor, air conditioner fan and air conditioner

Abstract

The utility model discloses a rotor assembly of an air conditioner fan motor, the air conditioner fan motor, an air conditioner fan and an air conditioner. The rotor assembly of the air conditioner fan motor comprises a rotor iron core, a magnet, a rotor insulator and a bearing, the rotor insulator wraps the rotor iron core and the magnet, one axial end of the rotor insulator is provided with a connecting part, and the connecting part is used for connecting fan blades; an outer ring of the bearing is matched with the rotor insulator, and an inner ring of the bearing is used for penetrating through a cantilever shaft and is matched with the cantilever shaft, so that the rotor insulator can rotate relative to the cantilever shaft. According to the rotor assembly of the air conditioner fan motor, the axial size of the air conditioner fan motor can be shortened, the size of an air conditioner fan is reduced, the number of parts of the air conditioner fan is reduced, and lightweight and miniaturized design of the air conditioner fan is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioner fan motors, and more specifically, to a rotor assembly of an air conditioner fan motor, an air conditioner fan motor, an air conditioner fan and an air conditioner. Background Art

[0002] As one of the main components of an air conditioner, the permanent magnet motor for a fan will inevitably develop in the direction of miniaturization and light weight under the market cost pressure.

[0003] The air conditioner fan motors in the related art have problems such as longer axial dimensions, larger volume, and more parts of the motor, which need to be further improved. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a rotor assembly of an air conditioner fan motor, which can shorten the axial dimension of the air conditioner fan motor, reduce the volume of the air conditioner fan, and reduce the number of parts of the air conditioner fan.

[0005] Another object of the utility model is to provide an air conditioner fan motor having the above rotor assembly of the air conditioner fan motor.

[0006] Another object of the utility model is to provide an air conditioner fan having the above air conditioner fan motor.

[0007] Another object of the utility model is to provide an air conditioner having the above air conditioner fan.

[0008] The rotor assembly of the air conditioner fan motor according to the embodiment of the utility model includes: a rotor core, a magnet and a rotor insulator, the rotor insulator covers the rotor core and the magnet, one axial end of the rotor insulator has a connecting portion for connecting a fan blade; a bearing, an outer ring of the bearing is matched with the rotor insulator, and an inner ring of the bearing is used for passing through a cantilever shaft and is matched with the cantilever shaft so that the rotor insulator can rotate relative to the cantilever shaft.

[0009] According to the rotor assembly of the air-conditioning fan motor of the embodiment of the present utility model, by providing a bearing that cooperates with the rotor insulator, the rotor insulator rotates relative to the cantilever shaft, the rotor body is separated from the cantilever shaft, and at the same time, the fan blade is installed on the rotor insulator, so that the rotation of the rotor insulator drives the fan blade to rotate. Therefore, the axial dimension of the cantilever shaft can be shortened. The rotor insulator cooperates with the bearing, and the bearing chambers provided at the axial two ends of the stator assembly are cancelled. Therefore, the number of parts of the stator assembly is reduced, and further, the number of parts, the axial dimension and the volume of the air-conditioning fan motor can be reduced, which is beneficial to realizing the miniaturization and light-weight design of the air-conditioning fan motor.

[0010] In addition, the rotor assembly of the air-conditioning fan motor according to the above embodiment of the present utility model may further have the following additional technical features:

[0011] According to some embodiments of the present utility model, the rotor insulator has a shaft hole for passing through the cantilever shaft, and a receiving groove is formed on the inner peripheral surface of the shaft hole, and the bearing is disposed in the receiving groove.

[0012] According to some embodiments of the present utility model, one axial end face of the bearing is in limit fit with the groove wall surface of the receiving groove, the receiving groove has an opening opposite to the other axial end face of the bearing, and the other axial end face of the bearing is in limit fit with a stopper disposed on the cantilever shaft.

[0013] According to some embodiments of the present utility model, there are two receiving grooves which are axially spaced apart, and an elastic gasket is abutted between the groove wall surface of at least one receiving groove and one axial end face of the bearing.

[0014] According to some embodiments of the present utility model, the rotor insulator includes an insulating main body and a ring-shaped convex portion. The insulating main body covers the rotor core and the magnet. The ring-shaped convex portion is disposed at the two axial ends of the insulating main body. The inner peripheral wall of the ring-shaped convex portion and the axial end face of the insulating main body jointly define the receiving groove, and a reinforcing rib is connected between the outer peripheral wall of the ring-shaped convex portion and the axial end face of the insulating main body.

[0015] According to some embodiments of the present utility model, the ring-shaped convex portion and the insulating main body are integrally injection-molded.

[0016] According to some embodiments of the present utility model, the inner diameter of the shaft hole is larger than the outer diameter of the cantilever shaft.

[0017] According to some embodiments of the present utility model, two bearings are provided and spaced apart along the axial direction. The axial two end faces of the rotor insulator are respectively a first end face and a second end face. The connecting portion is provided on the second end face. The distance between the bearing close to the first end face and the first end face is D1, and the distance between the bearing close to the second end face and the second end face is D2, and D1 is less than D2.

[0018] According to some embodiments of the present utility model, the inner circumferential surface of the bearing is in interference fit with the cantilever shaft, and the outer circumferential surface of the bearing is in transitional fit with the rotor insulator.

[0019] The air-conditioning blower motor according to an embodiment of the present utility model includes a rotor assembly of the air-conditioning blower motor according to an embodiment of the present utility model.

[0020] According to some embodiments of the present utility model, the air-conditioning blower motor further includes a stator assembly. The stator assembly includes a stator body and a cantilever shaft. The stator body has a receiving cavity. The stator body includes a closed end and an open mouth. The cantilever shaft is located in the receiving cavity and one end is fixed to the closed end. The open mouth is used for the rotor assembly to be inserted into the receiving cavity.

[0021] According to some embodiments of the present utility model, the air-conditioning blower motor further includes two annular flanges. The two annular flanges are respectively a first annular flange and a second annular flange. The first annular flange is connected to the outer peripheral wall of the rotor insulator, and the second annular flange is connected to the end of the stator body having the open mouth.

[0022] The first annular flange is arranged to surround the second annular flange, and the outer circumferential surface of the second annular flange extends axially in a direction close to the stator assembly and inclines inwardly; or,

[0023] The second annular flange is arranged to surround the first annular flange, and the outer circumferential surface of the first annular flange extends axially in a direction away from the stator body and inclines inwardly.

[0024] According to some embodiments of the present utility model, the cantilever shaft is provided with a stop member, and the other end face of the bearing abuts against the stop member, and the distance between the stop member close to the closed end and the closed end is greater than zero.

[0025] According to some embodiments of the present utility model, one end face of the rotor assembly in the axial direction is located outside the receiving cavity, and the other end face of the cantilever shaft is located on the side close to the closed end of the one end face of the rotor assembly in the axial direction.

[0026] The air-conditioning blower according to an embodiment of the present utility model includes the air-conditioning blower motor according to an embodiment of the present utility model.

[0027] An air conditioner according to an embodiment of the present invention includes an air conditioner blower according to an embodiment of the present invention.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 is a front view of an air conditioner blower motor according to an embodiment of the present invention;

[0031] Figure 2 is a cross-sectional view of an air conditioner blower motor according to an embodiment of the present invention;

[0032] Figure 3 is Figure 2 a schematic structural view of part A in;

[0033] Figure 4 is Figure 2 a schematic structural view of part B in;

[0034] Figure 5 is a first three-dimensional structural view of a rotor assembly of an air conditioner blower motor according to an embodiment of the present invention;

[0035] Figure 6 is a cross-sectional view of a rotor assembly of an air conditioner blower motor according to an embodiment of the present invention;

[0036] Figure 7 is a cross-sectional view of a rotor body in a rotor assembly of an air conditioner blower motor according to an embodiment of the present invention;

[0037] Figure 8 is a second three-dimensional structural view of a rotor assembly of an air conditioner blower motor according to an embodiment of the present invention, in which the end of the rotor assembly close to the open end is shown;

[0038] Figure 9 is a third three-dimensional structural view of a rotor assembly of an air conditioner blower motor according to an embodiment of the present invention, in which the end of the rotor assembly away from the open end is shown;

[0039] Figure 10 is a schematic structural view of an air conditioner blower according to an embodiment of the present invention;

[0040] Figure 11 is a schematic structural view of an air conditioner according to an embodiment of the present invention.

[0041] Reference Signs:

[0042] Air conditioner 2000; air conditioner fan 1000; air conditioner fan motor 100;

[0043] Stator assembly 10;

[0044] Stator body 11; receiving cavity 141; closed end 142; open end 143;

[0045] Second annular flange 144; third annular flange 145; cantilever shaft 15; stop member 151;

[0046] Fixed end 152; suspended end 153;

[0047] Rotor assembly 20;

[0048] Rotor core 21; magnet 22; rotor insulator 23; insulating body 231;

[0049] Annular protrusion 232; first segment 2321; second segment 2322; second annular portion 233;

[0050] Reinforcing rib 234; connecting portion 235; first annular flange 236; receiving groove 237;

[0051] Shaft hole 239; first end face 2310; second end face 2311; bearing 24;

[0052] Annular groove 25; rotor body 26;

[0053] Fan blade 30; elastic gasket 40. Detailed Implementation Manner

[0054] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction F", "radial direction", "circumferential direction", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0056] In the description of the present utility model, the "first feature" and the "second feature" may include one or more of such features. The meaning of "a plurality" is two or more. That the first feature is "above" or "below" the second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but in contact through additional features therebetween. That the first feature is "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature.

[0057] Currently, the air-conditioning fan motor usually has a traditional inner rotor structure. The rotating shaft rotates together with the inner rotor, and the output torque of the air-conditioning fan motor is transmitted through the rotating shaft. Since the rotating shaft needs to rotate relative to the stator assembly, bearing chambers need to be additionally designed at both axial ends of the stator assembly to support the bearings. The bearings support the rotating shaft for the rotating shaft to rotate together with the inner rotor, and the rotating shaft needs to extend out of the stator assembly by a relatively long length to facilitate the installation of the fan blade. Therefore, the existing air-conditioning fan motor has a long axial dimension, a large number of components, a large volume, and a complex structure.

[0058] However, the present application proposes a rotor assembly 20 of an air-conditioning fan motor. The rotor assembly 20 includes a rotor body 26 and a bearing 24. The bearing 24 cooperates with the rotor body 26. The cantilever shaft 15 is fixed, and only the rotor body 26 rotates relative to the cantilever shaft 15. The rotor body 26 is connected to the fan blade 30 to drive the fan blade 30 to rotate, thereby reducing the axial F dimension and the number of components of the air-conditioning fan motor 100, and further reducing the volume and the complexity of the structure of the air-conditioning fan motor 100, which is beneficial to the miniaturization and light weight of the air-conditioning fan motor 100.

[0059] The rotor assembly 20 of the air-conditioning fan motor according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0060] Refer to Figures 1 - 10 As shown, the rotor assembly 20 of the air-conditioning fan motor according to an embodiment of the present utility model may include: a rotor body 26 and a bearing 24.

[0061] Specifically, the rotor body 26 includes a rotor core 21, a magnet 22, and a rotor insulator 23. The rotor insulator 23 covers the rotor core 21 and the magnet 22. The rotor insulator 23 has good water-proof, air-proof, and electrical insulation properties. On the one hand, the rotor insulator 23 plays a role in fixing the rotor core 21 and the magnet 22. On the other hand, the rotor insulator 23 can reduce the possibility of contact between the rotor core 21 and the magnet 22 and air and moisture, which is beneficial to extending the service life of the rotor core 21 and the magnet 22.

[0062] In some embodiments, during the injection molding process of the rotor insulator 23, the connection between the rotor core 21 and the magnet 22 and the rotor insulator 23 can be achieved, that is, the rotor insulator 23 is injection-molded to connect the rotor core 21 and the magnet 22, so as to further increase its structural strength and reduce the risk of axial movement of the magnet 22 and the risk of the rotor core 21 breaking away and flying out during the rotation of the rotor body 26.

[0063] More specifically, the rotor insulator 23 can be a PBT (polybutylene terephthalate) material part, so that the rotor insulator 23 has good comprehensive properties such as heat resistance, flame retardancy, and electrical insulation, as well as good processing properties; however, this is not limited thereto, and the rotor insulator 23 can also be other material parts such as plastics.

[0064] The outer ring of the bearing 24 is fitted with the rotor insulator 23, and the inner ring of the bearing 24 is used to pass through the cantilever shaft 15 and is fitted with the cantilever shaft 15, so that the rotor insulator 23 can rotate relative to the cantilever shaft 15; one axial end of the rotor insulator 23 has a connecting portion 235, and the connecting portion 235 is used to connect the fan blade 30. That is to say, the cantilever shaft 15 is fitted with the rotor insulator 23 through the bearing 24, so that the rotor insulator 23 can rotate relative to the cantilever shaft 15, the cantilever shaft 15 is fixed, and the rotor insulator 23 directly drives the fan blade 30 to rotate, and the fan blade 30 is used to drive the gas flow.

[0065] In the related art, the fan blade is installed on the rotating shaft, and the rotating shaft drives the fan blade to rotate. In order to enable the rotating shaft to be better connected to the fan blade, the rotating shaft usually extends a long distance out of the rotor insulator, resulting in a longer axial dimension and a heavier weight of the entire fan motor. In this application, the fan blade 30 is directly installed at one axial end of the rotor insulator 23. Therefore, the axial dimension F of the cantilever shaft 15 can be set to be smaller, which is beneficial to reducing the axial dimension F and weight of the entire fan motor; at the same time, the fan blade 30 is installed at one axial end of the rotor insulator 23, and the connection area between the fan blade 30 and the rotor assembly 20 is larger, and the connection stability is also better.

[0066] In the related art, the bearing is installed and fitted with the stator assembly. At both axial ends of the stator assembly, bearing chambers need to be formed to accommodate and support the bearing. For example, the stator assembly needs to be provided with end caps that cooperate with the stator body to jointly define two axially spaced bearing chambers. At the same time, the waterproofing problem of the bearing chambers also needs to be considered, and there are a large number of components. In this application, the bearing 24 cooperates with the rotor insulator 23. For example, it directly cooperates with the shaft hole 239 of the rotor insulator 23 itself, so that there is no need to set too many components; one axial end of the stator assembly 10 can be set to be open, and there is no need to set components for forming the bearing chamber, and multiple components can be eliminated; secondly, the bearing 24 is also directly arranged in the accommodation cavity of the stator body 11. Therefore, the waterproof-related structure can be greatly simplified. Thus, the embodiments of this application are beneficial to reducing the number of components, volume and axial length of the air-conditioning fan motor 100.

[0067] Compared with the related art, the fan blade is installed on the rotating shaft, and the rotor assembly needs to be completely installed inside the stator assembly, and the fan blade needs to be spaced apart from the stator assembly by a certain distance. In this application, the fan blade 30 is directly installed on the rotor assembly 20, and one side of the stator assembly 10 is open. Therefore, the structural arrangement in this application can be more compact, which is beneficial to reducing the size of the entire air-conditioning fan 1000.

[0068] Among them, the outer ring of the bearing 24 and the rotor insulator 23 can be in transitional fit. Correspondingly, the inner ring of the bearing 24 and the cantilever shaft 15 are in interference fit. In this way, the installation stability of the bearing 24 is better.

[0069] According to the rotor assembly 20 of the air-conditioning fan motor according to the embodiment of the present utility model, by providing the bearing 24 that cooperates with the rotor insulator 23, the rotor insulator 23 rotates relative to the cantilever shaft 15, and the rotor body 26 is separated from the cantilever shaft 15. At the same time, the fan blade 30 is installed on the rotor insulator 23, so that the rotation of the rotor insulator 23 drives the fan blade 30 to rotate. Thus, the axial dimension F of the cantilever shaft 15 can be shortened. The rotor insulator 23 cooperates with the bearing 24, and the bearing chambers provided at both axial ends F of the stator assembly 10 are cancelled. Therefore, the number of components of the stator assembly 10 is reduced, and further, the number of components, axial dimension F and volume of the air-conditioning fan motor 100 can be reduced, which is beneficial to realizing the miniaturization and lightweight design of the air-conditioning fan motor 100.

[0070] According to some embodiments of the present utility model, reference can be made to Figure 6 and Figure 7 , the rotor insulator 23 has a shaft hole 239 for passing through the cantilever shaft 15, and a receiving groove 237 is formed on the inner peripheral surface of the shaft hole 239, and the bearing 24 is arranged in the receiving groove 237.

[0071] For example, reference can be made to Figure 6, the bearing 24 is located on both sides of the magnet 22 in the axial direction F. The circumferential side wall of the shaft hole 239 of the part of the magnet 22 provided on the rotor insulator 23 in the axial direction F can be located inside the circumferential side wall of the receiving groove 237, so as to facilitate minimizing the radial dimension of the rotor insulator 23; the wall thickness of the rotor insulator 23 located radially inside the magnet 22 can also be relatively thin, which is beneficial to reducing the mass of the rotor insulator 23.

[0072] Exemplarily, the circumferential side wall of at least part of the receiving groove 237 and the magnet 22 can be arranged opposite to each other in the radial direction. In this way, the dimension of the rotor insulator 23 in the axial direction F can be shortened.

[0073] By providing the receiving groove 237 for accommodating the bearing 24 on the inner circumferential wall of the shaft hole 239, the receiving groove 237 provides an installation position for the bearing 24. During installation, the bearing 24 can be directly placed in the receiving groove 237, which is convenient for installation; at the same time, the receiving groove 237 can limit the axial position of the bearing 24, and the receiving groove 237 is not prone to deformation, and the limiting effect on the bearing 24 is good.

[0074] The bearing 24 is arranged in the shaft hole 239, and the receiving groove 237 formed by the inner circumferential surface of the shaft hole 239 accommodates the bearing 24. There is no need to set additional components to form a space for accommodating the bearing, which is beneficial to reducing the number of components, improving the assembly efficiency, and shortening the axial dimension F.

[0075] In some embodiments, both ends of the shaft hole 239 of the cantilever shaft 15 are open, and the axially opposite ends of the shaft hole 239 are formed as openings opposite to the end face of the other axial end of the bearing 24 of the receiving groove 237. In this way, the two bearings 24 cooperating with the cantilever shaft 15 can be respectively inserted into the receiving groove 237 from the axially opposite ends of the shaft hole 239 in the axial direction F, which can reduce the installation difficulty of the bearing 24.

[0076] According to some embodiments of the present invention, reference can be made to Figure 3 、 Figure 4 、 Figure 6 , the end face of one axial end of the bearing 24 is in limiting cooperation with the groove wall surface of the receiving groove 237. Here, the groove wall surface of the receiving groove 237 refers to the axial groove wall surface of the receiving groove 237. The receiving groove 237 has an opening opposite to the end face of the other axial end of the bearing 24. When installing the bearing 24, the bearing 24 can be inserted into the receiving groove 237 from this opening, and the end face of the other axial end of the bearing 24 is in limiting cooperation with the stopper 151 provided on the cantilever shaft 15.

[0077] Here, the cooperation between the stopper 151 provided on the cantilever shaft 15 and the groove wall surface of the receiving groove 237 can limit both sides of the axial direction F of the bearing 24, realizing the fixation of the axial position of the bearing 24 relative to the cantilever shaft 15. At the same time, the bearings 24 at both ends cooperate with the receiving grooves 237 at both ends, so that the bearings 24 at both ends can limit the axial position of the rotor assembly 20 relative to the cantilever shaft 15, preventing the rotor assembly 20 and the bearing 24 from moving significantly relative to the cantilever shaft 15, which is beneficial to reducing the operating noise of the air-conditioning fan motor 100.

[0078] More specifically, the stopper 151 abuts against the axial end face of the inner ring of the bearing 24 in the axial direction F. The outer ring of the bearing 24 rotates relative to the stopper 151, and the stopper 151 is spaced apart from the outer ring of the bearing 24 in the radial direction. Thus, the stopper 151 does not generate friction with the outer ring of the bearing 24, reducing heat generated by friction and noise generated by friction, and improving the operating efficiency of the air-conditioning fan motor 100.

[0079] Specifically, the stopper 151 can be snap-connected to the cantilever shaft 15, or the stopper 151 can also be threadedly connected to the cantilever shaft 15, etc., and no specific limitation is made here.

[0080] According to some embodiments of the present invention, reference can be made to Figure 2 and Figure 4 , there are two receiving grooves 237 which are spaced apart in the axial direction F, and an elastic gasket 40 is abutted between the groove wall surface of at least one receiving groove 237 and the axial end face of the bearing 24.

[0081] That is to say, only one elastic gasket 40 can be provided, and one elastic gasket 40 abuts between the groove wall surface of one receiving groove 237 and the axial end face of the bearing 24; or, for the two receiving grooves 237, an elastic gasket 40 is abutted between each receiving groove 237 and the axial end face of the bearing 24 provided in this receiving groove 237.

[0082] The elastic gasket 40 is used to provide an axial pre-tightening force, so that the other end face of the bearing 24 abuts against the stopper 151 with a certain prestress, ensuring that the clearance of the bearing 24 is appropriate, which is beneficial to reducing the problem of vibration noise generated due to the axial movement of the bearing 24.

[0083] More specifically, the elastic gasket 40 abuts between the outer ring of the bearing 24 and the groove wall surface of the receiving groove 237, so that the receiving groove 237 is not easily rotated relative to the elastic gasket 40, and the elastic gasket 40 is not easily rotated relative to the outer ring of the bearing 24. Thus, the rotational synchronism between the outer ring of the bearing 24 and the rotor insulator 23 can be improved, making the outer ring of the bearing 24 not easily slip relative to the rotor insulator 23, and reducing the possibility of relative friction between the bearing 24 and the rotor insulator 23.

[0084] Specifically, the middle part of the elastic gasket 40 is hollow to avoid the cantilever shaft 15. The elastic gasket 40 can be a corrugated gasket. Along the circumferential direction of the elastic gasket 40, the elastic gasket 40 extends in a wavy shape, which can provide a large pre-tightening force, is not easily damaged, and is convenient for processing.

[0085] According to some embodiments of the present invention, reference can be made to Figures 5 - 9 As shown, the rotor insulator 23 includes an insulating body 231 and an annular convex portion 232. The insulating body 231 covers the rotor core 21 and the magnet 22. The annular convex portion 232 is provided at both axial ends F of the insulating body 231. The inner circumferential wall of the annular convex portion 232 and the axial end face F of the insulating body 231 jointly define a receiving groove 237. A reinforcing rib 234 is connected between the outer circumferential wall of the annular convex portion 232 and the axial end face F of the insulating body 231. Specifically, annular convex portions 232 can be provided at both axial ends of the insulating body 231.

[0086] Here, the outer diameter of the annular convex portion 232 is smaller than the outer diameter of the insulating body 231. By providing the annular convex portions 232 at both axial ends F of the insulating body 231, the inner circumferential surface of the annular convex portion 232 and the axial end face F of the insulating body 231 define the receiving groove 237, and then a reinforcing rib 234 is connected between the outer circumferential surface of the annular convex portion 232 and the axial end face F of the insulating body 231 to strengthen the structure of the annular convex portion 232, so that the actual volume and weight of the rotor insulator 23 can be minimized as much as possible, and thus it is beneficial to reduce the size and weight of the air-conditioning fan motor 100.

[0087] More specifically, the axial dimension F of the annular convex portion 232 is greater than the axial dimension F of the bearing 24 to facilitate good support for receiving the bearing 24; a plurality of reinforcing ribs 234 are evenly spaced along the circumferential direction of the annular convex portion 232 to facilitate good support for various circumferential parts of the annular convex portion 232 and reduce the possibility of radial runout of the rotor body 26 during rotation.

[0088] According to some embodiments of the present invention, the annular convex portion 232 and the insulating body 231 are integrally injection-molded. In this way, the number of components of the rotor assembly 20 is less, the assembly is more convenient, and the integrity of the annular convex portion 232 and the insulating body 231 is better. The annular convex portion 232 and the insulating body 231 are not easily separated, and the connection stability is better.

[0089] In other embodiments, the annular convex portion 232 and the insulating body 231 can also be separately formed and then connected by heat melting, or connected by a connecting member, or connected to each other through sub-connecting portions provided on the annular convex portion 232 and the insulating body 231.

[0090] According to some embodiments of the present invention, reference can be made to Figure 2, the inner diameter of the shaft hole 239 is greater than the outer diameter of the cantilever shaft 15.

[0091] In this way, the inner side wall of the shaft hole 239 can be spaced apart from the cantilever shaft 15, avoiding friction between the inner side wall of the shaft hole 239 and the cantilever shaft 15, which is beneficial to improving the operating efficiency of the air-conditioning fan motor 100.

[0092] According to some embodiments of the present invention, reference may be made to Figure 2 and Figure 6 , there are two bearings 24 and they are spaced apart along the axial direction F. The two end faces of the rotor insulator 23 along the axial direction F are respectively the first end face 2310 and the second end face 2311. The connecting portion 235 is provided on the second end face 2311. The cantilever shaft 15 includes a fixed end 152 and a suspended end 153. The fixed end 152 of the cantilever shaft 15 is close to the first end face 2310 and far from the second end face 2311. On the premise of meeting the layout requirements, the two bearings 24 should be arranged as close as possible to the first end face 2310, that is, close to the fixed end 152 of the cantilever shaft 15, so that the torque received by the fixed end 152 of the cantilever shaft 15 can be as small as possible, reducing the possibility of damage and deformation of the closed end 142 of the stator body 11.

[0093] Exemplarily, for example, reference may be made to Figure 6 , the distance between the bearing 24 close to the first end face 2310 and the first end face 2310 is D1, and the distance between the bearing 24 close to the second end face 2311 and the second end face 2311 is D2. D1 is less than D2, so that the bearing 24 close to the second end face 2311 is as close as possible to the first end face 2310, and the torque received by the fixed end 152 of the cantilever shaft 15 can be as small as possible, reducing the possibility of damage and deformation of the closed end 142 of the stator body 11.

[0094] In some embodiments, the axial dimension F of the annular convex portion 232 close to the first end face 2310 is smaller than the axial dimension F of the annular convex portion 232 close to the second end face 2311. Reference may be made to Figure 6 and Figure 7 , the annular convex portion 232 close to the second end face 2311 includes a first section 2321 and a second section 2322 that are axially connected. The first section 2321 is used to accommodate the bearing 24 and is matched with the outer peripheral surface of the outer ring of the bearing 24. The second section 2322 is located on the side of the first section 2321 close to the second end face 2311, and the inner diameter of the second section 2322 is greater than the inner diameter of the first section 2321. In this way, when the bearing 24 is installed in the receiving groove 237 close to the second end face 2311, the second section 2322 can play a guiding role for the bearing 24, so that it is more convenient to install the bearing 24 in the first section 2321.

[0095] According to some embodiments of the present utility model, the inner circumferential surface of the bearing 24 is in interference fit with the cantilever shaft 15, and the outer circumferential surface of the bearing 24 is in transitional fit with the rotor insulator 23.

[0096] It should be noted that the cantilever shaft 15 is usually a metal part. The inner circumferential surface of the bearing 24 is in interference fit with the cantilever shaft 15, and the cantilever shaft 15 is not easily deformed. The installation and fixation stability of the bearing 24 and the cantilever shaft 15 is good, and the installation accuracy is high. The outer circumferential surface of the bearing 24 is in transitional fit with the rotor insulator 23. In this way, the installation of the bearing 24 is not likely to cause deformation of the rotor insulator 23.

[0097] In some embodiments, the rotor core 21 is a multi-piece rotor core, and the number of poles of the rotor core is the same as that of the air-conditioning fan motor 100. The rotor core 21 adopts a segmented structure to improve the utilization rate of the motor silicon steel material stamping and reduce the leakage magnetic effect of the conduction channels on the rotor core 21. A plurality of magnets 22 are correspondingly disposed in a plurality of mounting grooves of the rotor core 21. The rotor core 21 and the plurality of magnets 22 are integrally encapsulated by the rotor insulator 23 made of PBT material to ensure the safety of the rotor assembly 20 during operation.

[0098] Next, the rotor assembly 20 of the air-conditioning fan motor according to a specific embodiment of the present utility model will be described in detail with reference to the accompanying drawings. It should be understood that the following description is only an exemplary illustration and should not be construed as a limitation of the utility model.

[0099] As Figures 1 - 10 shown, the rotor assembly 20 of the air-conditioning fan motor according to a specific embodiment of the present utility model includes a rotor body 26 and a bearing 24. The rotor body 26 includes a rotor core 21, a magnet 22, and a rotor insulator 23. The rotor insulator 23 covers the rotor core 21 and the magnet 22. One axial end of the rotor insulator 23 has a connecting portion 235 for connecting the fan blade 30. The outer ring of the bearing 24 is in transitional fit with the rotor insulator 23, and the inner ring of the bearing 24 is used for passing through the cantilever shaft 15 and is in interference fit with the cantilever shaft 15 so that the rotor insulator 23 can rotate relative to the cantilever shaft 15.

[0100] There are two bearings 24 spaced apart along the axial direction F. The two axial end faces of the rotor insulator 23 along the axial direction F are respectively a first end face 2310 and a second end face 2311. The connecting portion 235 is disposed on the second end face 2311. The rotor insulator 23 has a shaft hole 239 for passing through the cantilever shaft 15. A receiving groove 237 is formed on the inner circumferential surface of the shaft hole 239. The bearing 24 is disposed in the receiving groove 237. The setting of the receiving groove 237 can, on the one hand, reduce the radial dimension of the rotor insulator 23, and at the same time, can also play a good limiting role for the bearing 24.

[0101] One axial end face of the bearing 24 is in limit fit with the groove wall surface of the receiving groove 237. The receiving groove 237 has an opening opposite to the axial other end face of the bearing 24. The axial other end face of the bearing 24 is in limit fit with the stop member 151 provided on the cantilever shaft 15, so as to realize the axial limit of the bearing 24.

[0102] There are two receiving grooves 237 which are spaced apart along the axial direction F. An elastic gasket 40 is abutted between the groove wall surface of one of the receiving grooves 237 and the axial one end face of the bearing 24, so as to improve the synchronism of the rotation of the outer ring of the bearing 24 and the rotor insulator 23 and reduce the relative slip between the outer ring of the bearing 24 and the rotor insulator 23.

[0103] The rotor insulator 23 includes an insulating main body 231 and an annular convex portion 232. The insulating main body 231 covers the rotor core 21 and the magnet 22. The annular convex portions 232 are provided at both axial ends of the insulating main body 231 in the axial direction F. The inner peripheral wall of the annular convex portion 232 and the axial end face of the insulating main body 231 together define the receiving groove 237. A reinforcing rib 234 is connected between the outer peripheral wall of the annular convex portion 232 and the axial end face of the insulating main body 231, so that the annular convex portion 232 has good supporting performance for the bearing 24 and reduces the possibility of radial runout of the rotor body 26 during rotation.

[0104] The annular convex portion 232 and the insulating main body 231 are integrally injection-molded. The inner diameter of the shaft hole 239 is larger than the outer diameter of the cantilever shaft 15. The distance between the bearing 24 close to the first end face 2310 and the first end face 2310 is D1, and the distance between the bearing 24 close to the second end face 2311 and the second end face 2311 is D2. D1 is less than D2, so that the distances between the end of the cantilever shaft 15 connected to the stator body 11 and the two bearings 24 are both as small as possible, so as to facilitate reducing the torque received by the end of the cantilever shaft 15 connected to the stator body 11.

[0105] Reference may be made to Figure 1 and Figure 2 In addition, a second aspect of the present utility model further provides an air-conditioning fan motor 100.

[0106] According to the second aspect embodiment of the present utility model, the air-conditioning blower motor 100 includes the rotor assembly 20 of the air-conditioning blower motor in the above embodiment. Since the rotor assembly 20 of the air-conditioning blower motor according to the embodiment of the present utility model has the above beneficial technical effects, therefore, for the air-conditioning blower motor 100 according to the embodiment of the present utility model, by providing a bearing 24 that cooperates with the rotor insulator 23, the rotor insulator 23 rotates relative to the cantilever shaft 15, the rotor body 26 is separated from the cantilever shaft 15, and at the same time, the fan blade 30 is installed on the rotor insulator 23, so that the rotation of the rotor insulator 23 drives the fan blade 30 to rotate. Thus, the axial F dimension of the cantilever shaft 15 can be shortened. The rotor insulator 23 cooperates with the bearing 24, and the bearing chambers provided at both axial F ends of the stator assembly 10 are cancelled. Therefore, the number of components of the stator assembly 10 is reduced, and further, the number of components, the axial F dimension, and the volume of the air-conditioning blower motor 100 can be reduced, which is beneficial to realizing the miniaturization and lightweight design of the air-conditioning blower motor 100.

[0107] According to some embodiments of the present utility model, reference may be made to Figure 1 and Figure 2 , the air-conditioning blower motor 100 further includes a stator assembly 10. The stator assembly 10 includes a stator body 11 and a cantilever shaft 15. The stator body 11 has a receiving cavity 141. The stator body 11 includes a closed end 142 and an open end 143. The cantilever shaft 15 is located in the receiving cavity 141 and one end is fixed to the closed end 142. The open end 143 is used for the rotor assembly 20 to be inserted into the receiving cavity 141. That is to say, the air-conditioning blower motor 100 in the embodiment of the present utility model is an inner rotor motor, and the structure is more compact.

[0108] The two axial F ends of the cantilever shaft 15 are respectively a fixed end 152 and a suspended end 153. The fixed end 152 of the cantilever shaft 15 is directly fixed to the closed end 142 of the stator assembly 10. That is to say, the cantilever shaft 15 will not rotate relative to the stator assembly 10. Thus, the stator assembly 10 does not need to be provided with multiple components to form a bearing chamber for installing the bearing 24. The cantilever shaft 15 can be directly fixed to the stator assembly 10, which can reduce the number of components of the stator assembly 10 and the volume of the stator assembly 10.

[0109] According to some embodiments of the present utility model, the air-conditioning blower motor 100 further includes two annular flanges, which are respectively a first annular flange 236 and a second annular flange 144. The first annular flange 236 is connected to the outer peripheral wall of the rotor insulator 23. The second annular flange 144 is connected to the end of the stator body 11 having the open end 143. The first annular flange 236 is disposed around the second annular flange 144. The first annular flange 236 is located radially outside the second annular flange 144. The outer peripheral surface of the second annular flange 144 extends axially F in a direction close to the stator assembly 10 and inclines inward.

[0110] According to some embodiments of the present utility model, reference may be made to Figure 2 , the air conditioner blower motor 100 further includes two annular flanges, which are the first annular flange 236 and the second annular flange 144 respectively. The first annular flange 236 is connected to the outer peripheral wall of the rotor insulator 23, and the second annular flange 144 is connected to the end of the stator body 11 having an open end 143. The second annular flange 144 is disposed around the first annular flange 236, and the second annular flange 144 is located radially inside the first annular flange 236. The outer peripheral surface of the first annular flange 236 extends obliquely inward in a direction away from the stator body 11 along the axial direction F.

[0111] It should be noted that the annular flange located on the outer ring can play a role in blocking water. When water flows towards the stator body 11 in the radial direction (or from top to bottom), the annular flange located on the outer ring will block the water and conduct axial F diversion, reducing the possibility of water directly entering the gap between the stator body 11 and the rotor insulator 23.

[0112] The water blocked by the annular flange on the outer ring will flow towards the annular flange on the inner ring. For the embodiment where the second annular flange 144 is disposed on the inner ring, the outer peripheral surface of the second annular flange 144 extends obliquely inward in a direction close to the stator assembly 10 along the axial direction F, so that the second annular flange 144 can conduct the water in the direction close to the stator assembly 10 along the axial direction F, that is, in a direction away from the mating gap between the rotor insulator 23 and the stator body 11; as Figure 2 shown, for the embodiment where the first annular flange 236 is disposed on the inner ring, the outer peripheral surface of the first annular flange 236 extends obliquely inward in a direction away from the stator body 11 along the axial direction F, so that the first annular flange 236 can conduct the water in a direction away from the stator body 11, that is, in a direction away from the mating gap between the rotor insulator 23 and the stator body 11; thus, the possibility of water flowing into the mating gap between the rotor insulator 23 and the stator body 11 can be reduced, achieving a good waterproof effect.

[0113] Exemplarily, the first annular flange 236 can be integrally formed with the rotor insulator 23, or the first annular flange 236 can be separately formed and then connected to the rotor insulator 23. For example, the rotor insulator 23 is injection-molded and connected to the first annular flange 236 as a whole.

[0114] Exemplarily, the second annular flange 144 can be integrally formed with the stator assembly 10, or the second annular flange 144 can also be separately formed and then connected to the stator assembly 10. For example, the stator assembly 10 is injection-molded and connected to the second annular flange 144 as a whole.

[0115] In some embodiments, the air-conditioning blower motor 100 may further include a third annular flange 145. Refer to Figure 2 , for the embodiment in which the second annular flange 144 surrounds the first annular flange 236, the third annular flange 145 is connected to the end of the stator body 11 having the open end 143, and the first annular flange 236 surrounds the third annular flange 145. In this way, it is beneficial to reduce the possibility of moisture and impurities entering the mating gap between the rotor insulator 23 and the stator body 11. For the embodiment in which the first annular flange 236 surrounds the second annular flange 144, the third annular flange 145 is connected to the end of the stator assembly 10 having the open end 143, and the third annular flange 145 surrounds the first annular flange 236. In this way, it is beneficial to reduce the possibility of impurities entering the mating gap between the rotor insulator 23 and the stator body 11, and is also beneficial to further increase the waterproofness of the air-conditioning blower motor 100.

[0116] In some embodiments, as Figure 2 , Figure 5 and Figure 7 shown, an annular groove 25 is formed on the axial F end face of the rotor insulator 23 near the open end 143. The part of the axial F end of the rotor insulator 23 near the open end 143 located inside the annular groove 25 forms an annular convex portion 232. The reinforcing rib 234 for strengthening the annular convex portion 232 is arranged in the annular groove 25, and the reinforcing rib 234 connects the radially opposite wall surfaces of the annular groove 25. The part of the axial F end of the rotor insulator 23 near the open end 143 located outside the annular groove 25 forms a second annular portion 233, and the second annular portion 233 is connected with a first annular flange 236. In this way, the axial F dimension of the rotor insulator 23 is smaller, which is beneficial to reducing the size of the air-conditioning blower motor 100 and the axial F dimension of the cantilever shaft 15, and at the same time, the weight of the rotor assembly 20 can also be reduced.

[0117] In some embodiments, the axial F end face of the annular convex portion 232 near the open end 143 is located axially F inside the axial F end face of the second annular portion 233. In this way, the annular convex portion 232 is not likely to interfere with the installation of the fan blade 30, and it is beneficial to save materials and reduce the weight of the rotor insulator 23.

[0118] According to some embodiments of the present invention, refer to Figure 3 and Figure 4, a retaining member 151 is provided on the cantilever shaft 15, and the other end face of the bearing 24 abuts against the retaining member 151. Specifically, for the bearing 24 close to the closed end 142, a retaining member 151 is provided between the other end face of the bearing 24 and the closed end 142. The retaining member 151 is installed on the cantilever shaft 15 and is used for limiting cooperation with the other end face of the bearing 24. For the bearing 24 close to the open end 143, a retaining member 151 is provided between the other end face of the bearing 24 and the open end 143. The retaining member 151 is installed on the cantilever shaft 15 and is used for limiting cooperation with the other end face of the bearing 24.

[0119] The distance L between the retaining member 151 close to the closed end 142 and the closed end 142 is greater than zero. Here, it means that the minimum distance between the part of the closed end 142 opposite to the retaining member 151 in the axial direction F and the retaining member 151 is greater than zero. That is to say, the retaining member 151 and the closed end 142 do not contact. In this way, the possibility that the pressure of the rotor insulator 23 on the bearing 24 is transmitted to the closed end 142 through the retaining member 151 can be reduced, and thus the possibility of deformation and damage of the stator body 11 can be reduced.

[0120] Exemplarily, the distance between the retaining member 151 close to the closed end 142 and the closed end 142 can be L, L≥0.5mm. For example, L is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc., but not limited thereto. When the process and the strength of the retaining member 151 permit, the smaller the distance between the retaining member 151 close to the closed end 142 and the closed end 142, the better, so as to reduce the moment received at the end of the cantilever shaft 15 connected to the closed end 142.

[0121] Specifically, the retaining member 151 can be a circlip retaining ring. A groove for installing the circlip retaining ring is provided on the cantilever shaft 15. During installation, the circlip retaining ring is clamped in the groove, with a simple structure and convenient installation.

[0122] According to some embodiments of the present invention, reference can be made to Figure 2 , one end face in the axial direction of the rotor assembly 20 is located outside the accommodation cavity 141. In this way, on the one hand, it is convenient to connect one end face in the axial direction of the rotor assembly 20 with the fan blade 30, and the fan blade 30 is not easy to contact the stator assembly 10; on the other hand, a part of the wall surface of the rotor assembly 20 extending out of the accommodation cavity 141 can be connected with the first annular flange 236 to achieve a better waterproof effect.

[0123] The other end face of the cantilever shaft 15 is located axially inside one end face in the axial direction of the rotor assembly 20. That is to say, the axial dimension F of the cantilever shaft 15 is shorter. In this way, the moment received at the end of the cantilever shaft 15 connected to the closed end 142 is smaller, and at the same time, the cantilever shaft 15 is not easy to interfere with the installation of the fan blade 30.

[0124] Such asFigure 10 As shown, the air-conditioning fan 1000 according to an embodiment of the present invention includes the air-conditioning fan motor 100 according to an embodiment of the present invention. Since the air-conditioning fan motor 100 according to an embodiment of the present invention has the above-mentioned beneficial technical effects, therefore, for the air-conditioning fan 1000 according to an embodiment of the present invention, by providing a bearing 24 that cooperates with the rotor insulator 23, the rotor insulator 23 rotates relative to the cantilever shaft 15, the rotor body 26 is separated from the cantilever shaft 15, and at the same time, the fan blade 30 is installed on the rotor insulator 23, so that the rotation of the rotor insulator 23 drives the fan blade 30 to rotate. Thus, the axial dimension F of the cantilever shaft 15 can be shortened. The rotor insulator 23 cooperates with the bearing 24, and the bearing chambers provided at both axial ends F of the stator assembly 10 are cancelled. Therefore, the number of components of the stator assembly 10 is reduced, and further, the number of components, the axial dimension F and the volume of the air-conditioning fan motor 100 can be reduced, which is beneficial to realizing the miniaturization and lightweight design of the air-conditioning fan motor 100.

[0125] As Figure 11 As shown, the air conditioner 2000 according to an embodiment of the present invention includes the air-conditioning fan 1000 according to an embodiment of the present invention. Since the air-conditioning fan 1000 according to an embodiment of the present invention has the above-mentioned beneficial technical effects, therefore, for the air conditioner 2000 according to an embodiment of the present invention, by providing a bearing 24 that cooperates with the rotor insulator 23, the rotor insulator 23 rotates relative to the cantilever shaft 15, the rotor body 26 is separated from the cantilever shaft 15, and at the same time, the fan blade 30 is installed on the rotor insulator 23, so that the rotation of the rotor insulator 23 drives the fan blade 30 to rotate. Thus, the axial dimension F of the cantilever shaft 15 can be shortened. The rotor insulator 23 cooperates with the bearing 24, and the bearing chambers provided at both axial ends F of the stator assembly 10 are cancelled. Therefore, the number of components of the stator assembly 10 is reduced, and further, the number of components, the axial dimension F and the volume of the air-conditioning fan motor 100 can be reduced, which is beneficial to realizing the miniaturization and lightweight design of the air-conditioning fan motor 100.

[0126] The other constitutions and operations of the air-conditioning fan motor 100, the air-conditioning fan 1000 and the air conditioner 2000 according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0127] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0128] In the description of this specification, the descriptions referring to the terms "embodiment", "specific embodiment", "example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0129] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A rotor assembly of an air conditioner fan motor, characterized in that: include: A rotor core, a magnet and a rotor insulator, wherein the rotor insulator covers the rotor core and the magnet, and an axial end of the rotor insulator has a connecting portion, and the connecting portion is used to connect a fan blade; A bearing, wherein the outer ring of the bearing cooperates with the rotor insulator, and the inner ring of the bearing is used to penetrate the cantilever shaft and cooperate with the cantilever shaft, so that the rotor insulator can rotate relative to the cantilever shaft.

2. The rotor assembly of the air conditioner fan motor according to claim 1, characterized in that: The rotor insulator has an axial hole for passing the cantilever shaft, and an accommodating groove is formed on the inner circumferential surface of the axial hole, and the bearing is arranged in the accommodating groove.

3. The rotor assembly of the air conditioner fan motor according to claim 2, characterized in that: The end face of one axial end of the bearing is limitedly matched with the groove wall of the accommodating groove, and the accommodating groove has an opening opposite to the other axial end face of the bearing, and the other axial end face of the bearing is limitedly matched with a stopper provided on the cantilever shaft.

4. The rotor assembly of the air conditioner fan motor according to claim 3, characterized in that: The receiving grooves are provided with two and are spaced apart in the axial direction, and an elastic gasket is abutted between the groove wall surface of at least one of the receiving grooves and the axial end surface of the bearing.

5. The rotor assembly of the air conditioner fan motor according to claim 2, characterized in that: The rotor insulator includes an insulating body and an annular protrusion, the insulating body covers the rotor core and the magnet, the annular protrusion is arranged at both axial ends of the insulating body, the inner circumferential wall of the annular protrusion and the axial end surface of the insulating body jointly define the accommodating groove, and a reinforcing rib is connected between the outer circumferential wall of the annular protrusion and the axial end surface of the insulating body.

6. The rotor assembly of the air conditioner fan motor according to claim 5, characterized in that: The annular protrusion and the insulating body are integrally injection-molded.

7. The rotor assembly of the air conditioner fan motor according to claim 2, characterized in that: The inner diameter of the shaft hole is greater than the outer diameter of the cantilever shaft.

8. The rotor assembly of the air conditioner fan motor according to claim 1, characterized in that: The bearings are provided with two and are spaced apart in the axial direction. The end faces at both axial ends of the rotor insulator are respectively a first end face and a second end face. The connecting portion is provided at the second end face. The distance between the bearing close to the first end face and the first end face is D1, and the distance between the bearing close to the second end face and the second end face is D2, and D1 is smaller than D2.

9. The rotor assembly of the air conditioner fan motor according to claim 1, characterized in that: The inner circumferential surface of the bearing is interference-fitted with the cantilever shaft, and the outer circumferential surface of the bearing is transition-fitted with the rotor insulator.

10. An air conditioner fan motor, characterized in that: It comprises a rotor assembly of an air conditioner fan motor according to any one of claims 1-9.

11. The air conditioner fan motor according to claim 10, characterized in that: It also includes a stator assembly, which includes a stator body and a cantilever shaft. The stator body has a accommodating cavity. The stator body includes a closed end and an open mouth. The cantilever shaft is located in the accommodating cavity and one end is fixed to the closed end. The open mouth is used to allow the rotor assembly to be installed in the accommodating cavity.

12. The air conditioner fan motor according to claim 11, characterized in that: The rotor insulator also includes two annular flanges, which are respectively a first annular flange and a second annular flange, wherein the first annular flange is connected to the outer peripheral wall of the rotor insulator, and the second annular flange is connected to the end of the stator body having the open opening. The first annular flange is arranged around the second annular flange, and the outer peripheral surface of the second annular flange extends axially toward the direction of the stator assembly and inwardly inclined; or, The second annular flange is arranged around the first annular flange, and the outer peripheral surface of the first annular flange extends in an axial direction away from the stator body and in an inwardly inclined manner.

13. The air conditioner fan motor according to claim 11, characterized in that: The cantilever shaft is provided with a stopper, the other end surface of the bearing abuts against the stopper, and the distance between the stopper close to the closed end and the closed end is greater than zero.

14. The air conditioner fan motor according to claim 12, characterized in that: An axial end surface of the rotor assembly is located outside the accommodating cavity, and the other end surface of the cantilever shaft is located on a side of the axial end surface of the rotor assembly close to the closed end.

15. An air conditioner fan, characterized in that: Comprising an air conditioning fan motor according to any one of claims 10-14.

16. An air conditioner, characterized in that: Comprising the air conditioning fan according to claim 15.

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