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

Abstract

The utility model discloses a stator assembly of an air conditioner fan motor, the air conditioner fan motor, an air conditioner fan and an air conditioner. The stator assembly of the air conditioner fan motor comprises a stator iron core, a stator winding and a stator insulator, the stator insulator wraps the stator iron core and the stator winding, the stator insulator is provided with a containing cavity, one axial end of the containing cavity is a closed end, the other axial end of the containing cavity is an opening, and the opening is communicated with the containing cavity. The opening is used for installing the rotor assembly in the accommodating cavity, and the closed end is provided with a reinforcing structure; the cantilever shaft is located in the containing cavity and used for being in rotatable fit with the rotor assembly, and one end of the cantilever shaft is fixedly connected with the closed end. According to the stator assembly of the air conditioner fan motor, the axial size and the volume of the air conditioner fan motor can be shortened, and the number of parts is smaller.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioner fan motors, and more specifically, to a stator 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 parts 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, and need to be further improved. Summary of the Utility Model

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

[0005] Another object of the utility model is to provide an air conditioner fan motor having the above stator 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 stator assembly of the air conditioner fan motor according to the embodiment of the utility model includes: a stator core, a stator winding and a stator insulator, the stator insulator covers the stator core and the stator winding, the stator insulator has a receiving cavity, one axial end of the receiving cavity is a closed end, the other axial end of the receiving cavity is an open mouth, the open mouth is used for installing a rotor assembly in the receiving cavity, and the closed end is provided with a strengthening structure; a cantilever shaft, the cantilever shaft is located in the receiving cavity and is used for rotatably cooperating with the rotor assembly, and one end of the cantilever shaft is fixedly connected to the closed end.

[0009] The stator assembly of the air-conditioning fan motor according to an embodiment of the present utility model includes a stator body and a cantilever shaft. One end of the cantilever shaft is fixed to the stator body, and a plurality of components for forming a bearing chamber at both ends of the stator body are cancelled. Therefore, the number of components of the stator assembly is less. The cantilever shaft and the rotor assembly are rotatably matched, and only the rotor assembly rotates relative to the stator assembly to drive the fan blade to rotate. The cantilever shaft does not need to be connected to the fan blade. Therefore, the axial length of the cantilever shaft is much smaller than that of the rotating shaft of the inner rotor structure air-conditioning fan motor in the related art, that is, the axial dimension of the cantilever shaft is smaller. Thus, the axial dimension and the number of components of the air-conditioning fan motor can be reduced, the axial space occupied by the air-conditioning fan motor can be reduced, and further the volume and the structural complexity of the air-conditioning fan motor can be reduced, which is beneficial to the miniaturization and light-weight design of the air-conditioning fan motor.

[0010] In addition, the stator 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, one end face of the cantilever shaft is exposed outside the outer wall surface of the closed end.

[0012] According to some embodiments of the present utility model, the strengthening structure includes a strengthening convex portion and a first strengthening rib provided on the closed end. One end of the cantilever shaft passes through the strengthening convex portion and is fixedly connected to the strengthening convex portion. The first strengthening rib is connected between the strengthening convex portion and the wall surface of the closed end.

[0013] According to some embodiments of the present utility model, the middle part of the closed end is recessed away from the open end to form a concave cavity. The strengthening convex portion is formed on the bottom wall of the concave cavity, and the first strengthening rib is connected between the strengthening convex portion and the wall surface of the concave cavity.

[0014] According to some embodiments of the present utility model, the strengthening structure includes a second strengthening rib. The second strengthening rib is located in the accommodating cavity and connects the closed end and the circumferential wall surface of the accommodating cavity.

[0015] According to some embodiments of the present utility model, a plurality of first strengthening ribs and a plurality of second strengthening ribs are formed on the side wall surface of the closed end facing the accommodating cavity. The plurality of first strengthening ribs are arranged at intervals in the circumferential direction, the plurality of second strengthening ribs are arranged at intervals in the circumferential direction, and the second strengthening ribs and the first strengthening ribs are arranged in one-to-one correspondence in the radial direction.

[0016] According to some embodiments of the present utility model, at least one concave portion is provided on the outer peripheral surface of the end portion of the stator insulator close to the closed end. The concave portion extends along the circumferential direction of the stator insulator. The strengthening structure includes a third strengthening rib provided in the concave portion. The third strengthening rib connects the bottom wall and the side wall of the concave portion.

[0017] According to some embodiments of the present utility model, a plurality of the concave portions are provided, and the third reinforcing ribs of adjacent concave portions are arranged in one-to-one correspondence in the radial direction.

[0018] According to some embodiments of the present utility model, a plurality of connecting lugs are provided on the circumferential side wall of the stator insulator. The connecting lugs are provided with second connecting portions for installing the stator assembly, and buffer members are provided at the second connecting portions.

[0019] According to some embodiments of the present utility model, the stator insulator is injection-molded and connected to one end of the cantilever shaft.

[0020] According to some embodiments of the present utility model, a groove and / or a protrusion are provided on the circumferential side wall of one end of the cantilever shaft, and the closed end covers the groove and / or the protrusion.

[0021] The air-conditioning blower motor according to an embodiment of the present utility model includes a stator assembly of the air-conditioning blower motor according to an embodiment of the present utility model.

[0022] According to some embodiments of the present utility model, the air-conditioning blower motor further includes a rotor body and a bearing. The cantilever shaft passes through the bearing and cooperates with the rotor body through the bearing. The cantilever shaft is provided with a stopper for limiting the axial position of the bearing. The distance between the stopper closest to the closed end and the closed end is greater than zero.

[0023] According to some embodiments of the present utility model, the air-conditioning blower motor further includes two annular flanges, namely a first annular flange and a second annular flange. The first annular flange is connected to the outer peripheral wall of the rotor body. The stator assembly includes a stator body, and the stator body includes a stator core, a stator winding, and a stator insulator. The second annular flange is connected to the end of the stator body having the open end.

[0024] The first annular flange surrounds the second annular flange, and the outer peripheral surface of the second annular flange extends axially toward the stator assembly and inclines inward; or,

[0025] The second annular flange surrounds the first annular flange, and the outer peripheral surface of the first annular flange extends axially away from the stator body and inclines inward.

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

[0028] Additional aspects and advantages of the present utility model 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 utility model. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0030] Figure 1 is the front view of an air-conditioning fan motor according to an embodiment of the present utility model;

[0031] Figure 2 is Figure 1 the sectional view taken along line A-A in

[0032] Figure 3 is Figure 1 the sectional view taken along line B-B in

[0033] Figure 4 is the first sectional view of a stator assembly of an air-conditioning fan motor according to an embodiment of the present utility model;

[0034] Figure 5 is Figure 4 the structural schematic diagram of part C in

[0035] Figure 6 is the second sectional view of a stator assembly of an air-conditioning fan motor according to an embodiment of the present utility model;

[0036] Figure 7 is the first three-dimensional structural diagram of a stator assembly of an air-conditioning fan motor according to an embodiment of the present utility model;

[0037] Figure 8 is the second three-dimensional structural diagram of a stator assembly of an air-conditioning fan motor according to an embodiment of the present utility model;

[0038] Figure 9 is the front view of a stator assembly of an air-conditioning fan motor according to an embodiment of the present utility model;

[0039] Figure 10 is Figure 2 the structural schematic diagram of part A in

[0040] Figure 11 is Figure 2 the structural schematic diagram of part B in

[0041] Figure 12 is the sectional view of an air-conditioning fan according to an embodiment of the present utility model;

[0042] Figure 13 is the structural schematic diagram of an air-conditioning according to an embodiment of the present utility model.

[0043] Reference numerals:

[0044] Air conditioner 2000; air conditioner fan 1000; air conditioner fan motor 100;

[0045] Stator assembly 10;

[0046] Stator body 11; stator core 12; insulating bracket 131; stator insulator 14;

[0047] Receiving cavity 141; closed end 142; outer wall surface 1421 of the closed end 142; concave cavity 1422;

[0048] Open end 143; second annular flange 144; third annular flange 145; recess 146;

[0049] Connecting ear 147; counterbore 1471; second connecting portion 148; opening 1481;

[0050] Buffer member 149; limiting boss 1491; cantilever shaft 15; blocking member 151;

[0051] End face 152 of one end of the cantilever shaft 15; groove 154; clamping groove 155; pin 16; stator winding 17;

[0052] Rotor assembly 20;

[0053] Magnet 22; rotor insulator 23; first connecting portion 235; first annular flange 236;

[0054] Bearing 24; rotor body 26; rotor core 21;

[0055] Fan blade 30;

[0056] Reinforcing convex portion 41; first reinforcing rib 42; second reinforcing rib 43; third reinforcing rib 44; axial direction F. Detailed implementation manners

[0057] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein 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 by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0058] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 therefore should not be construed as a limitation to the present utility model.

[0059] In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features. The meaning of "a plurality" is two or more. The first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. The first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0060] Currently, the air-conditioning fan motor usually has a traditional inner rotor structure. The rotating shaft rotates fixedly 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 and the inner rotor to rotate together, 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, it results in a longer axial dimension of the air-conditioning fan motor, a large number of components, a large volume, and a complex structure.

[0061] However, the present application proposes a stator assembly 10 of an air-conditioning fan motor. The stator assembly 10 includes a stator body 11 and a cantilever shaft 15. One end of the cantilever shaft 15 is fixed to the stator body 11, eliminating a plurality of components at both ends of the stator body 11 for forming bearing chambers. Therefore, the stator assembly 10 has fewer components. The cantilever shaft 15 and the rotor assembly 20 are rotatably matched, and only the rotor assembly 20 rotates relative to the stator assembly 10 to drive the fan blade 30 to rotate. The cantilever shaft 15 does not need to be connected to the fan blade 30. Therefore, the axial dimension F of the cantilever shaft 15 is smaller. Thus, the axial dimension F of the air-conditioning fan motor 100 and the number of components can be reduced, and further the volume and the complexity of the structure of the air-conditioning fan motor 100 can be reduced, which is beneficial to the miniaturization and lightweight design of the air-conditioning fan motor 100.

[0062] The following describes the stator assembly 10 of the air-conditioning fan motor according to an embodiment of the present utility model with reference to the drawings.

[0063] Reference Figures 1 - 12 As shown, the stator assembly 10 of the air-conditioning fan motor according to an embodiment of the present utility model may include: a stator body 11 and a cantilever shaft 15. The stator body 11 includes a stator core 12, a stator winding 17, and a stator insulator 14. The stator insulator 14 covers the stator core 12 and the stator winding 17. The stator insulator 14 has a receiving cavity 141. One axial F end of the receiving cavity 141 is a closed end 142, and the other axial F end of the receiving cavity 141 is an open end 143. The open end 143 is used for installing the rotor assembly 20 in the receiving cavity 141. The closed end 142 is provided with a strengthening structure; the cantilever shaft 15 is located in the receiving cavity 141 and is used for rotatably cooperating with the rotor assembly 20. One end of the cantilever shaft 15 is fixedly connected to the closed end 142.

[0064] Specifically, the stator body 11 includes a stator core 12, a stator winding 17, and a stator insulator 14. The stator insulator 14 covers the stator core 12 and the stator winding 17. The stator insulator 14 has good water-proof, air-proof, and electrical insulation properties. On the one hand, the stator insulator 14 plays a role in fixing the stator core 12 and the stator winding 17. On the other hand, the stator insulator 14 can reduce the possibility of contact between the stator core 12 and the stator winding 17 and air and moisture, which is beneficial to extending the service life of the stator core 12 and the stator winding 17.

[0065] In the related art, the stator insulator includes an insulating main body and end caps covering the axially two ends of the insulating main body. The two end caps define a bearing chamber for accommodating bearings. The bearings in the bearing chambers at both ends are used for passing through and supporting a rotating shaft. The rotating shaft is fixed to the rotor insulator, and the rotor insulator drives a fan blade 30 installed on the rotating shaft to rotate through the rotating shaft.

[0066] In the present application, the stator insulator 14 has a receiving cavity 141. One axial F end of the receiving cavity 141 is a closed end 142, and the other axial F end of the receiving cavity 141 is an open end 143. The cantilever shaft 15 is located in the receiving cavity 141. One end of the cantilever shaft 15 is directly fixedly connected to the closed end 142. The design of the end cap is cancelled. The stator insulator 14 has good structural integrity, fewer components, a smaller volume, and is more convenient to assemble. The axial F herein refers to the extending direction of the central axis of the cantilever shaft 15.

[0067] The open end 143 is used to install the rotor assembly 20 into the receiving cavity 141. That is to say, the outer diameter of the open end 143 is larger than the maximum outer diameter of the rotor assembly 20. The other end of the receiving cavity 141 is directly designed as the open end 143, which is convenient for the installation of the rotor assembly 20. At the same time, the number of components is small, which is convenient for assembly. The rotor assembly 20 is installed in the receiving cavity 141. That is to say, the air-conditioning blower motor 100 in the present application is an inner-rotor motor, and the structure is more compact. The cantilever shaft 15 is used for rotatably cooperating with the rotor assembly 20. That is to say, only the rotor assembly 20 rotates relative to the stator body 11. The rotor assembly 20 is used to connect with the fan blade 30 to drive the fan blade 30 to rotate, and the fan blade 30 is used to drive the gas flow. The cantilever shaft 15 is fixed relative to the stator body 11, and the cantilever shaft 15 only plays a role of supporting and limiting the rotor assembly 20. Therefore, the axial dimension F of the cantilever shaft 15 can be designed to be shorter. Thus, it is beneficial to shorten the axial dimension F of the air-conditioning blower motor 100.

[0068] The closed end 142 is provided with a strengthening structure, and the strengthening structure can be a strengthening cavity formed by the stator insulator 14, a reinforcing rib arranged on the stator insulator 14, etc. The strengthening structure is used to strengthen the closed end 142, so that the closed end 142 has a higher structural strength, thereby enhancing the installation strength and stability of the cantilever shaft 15, reducing the possibility that the rotor assembly 20 has radial runout during rotation, resulting in a large operating noise of the air-conditioning blower motor 100 and affecting the operating stability of the air-conditioning blower motor 100. At the same time, the stator body 11 is not easily damaged and has a long service life.

[0069] For the stator assembly 10 of the air-conditioning blower motor according to the embodiment of the present invention, the stator assembly 10 includes a stator body 11 and a cantilever shaft 15. One end of the cantilever shaft 15 is fixed to the stator body 11, and a plurality of components for forming the bearing 24 chamber at both ends of the stator body 11 are cancelled. Therefore, the number of components of the stator assembly 10 is less; the cantilever shaft 15 and the rotor assembly 20 are rotatably cooperated, and only the rotor assembly 20 rotates relative to the stator assembly 10 to drive the fan blade 30 to rotate. The cantilever shaft 15 does not need to be connected to the fan blade 30. Therefore, the axial length F of the cantilever shaft 15 is much smaller than the rotating shaft of the air-conditioning blower motor with an inner-rotor structure in the related art, that is, the axial dimension F of the cantilever shaft 15 is smaller; thus, the axial dimension F and the number of components of the air-conditioning blower motor 100 can be reduced, the axial F space occupied by the air-conditioning blower motor 100 can be reduced, and further the volume and structural complexity of the air-conditioning blower motor 100 can be reduced, which is beneficial to the miniaturization and lightweight design of the air-conditioning blower motor 100.

[0070] According to some embodiments of the present invention, reference can be made to Figure 5 As shown, one end face 152 of the cantilever shaft 15 is exposed outside the outer wall surface 1421 of the closed end 142.

[0071] It should be noted that the cantilever shaft 15 can be used as an insert to realize the connection between the stator body 11 and the cantilever shaft 15 during the molding process of the stator body 11. One end face 152 of the cantilever shaft 15 is exposed outside the outer end face of the closed end 142, and the other end of the cantilever shaft 15 is suspended in the accommodation cavity 141. In this way, during injection molding, the injection molding module can abut against both end faces of the cantilever shaft 15, so as to facilitate the positioning of the position of the cantilever shaft 15, reduce the possibility of axial F displacement of the cantilever shaft 15 during injection molding, and is conducive to making the axial fixed position of the cantilever shaft 15 more accurate.

[0072] In some embodiments, reference may be made to Figure 2 and Figure 3 , the rotor assembly 20 includes a rotor body 26 and a bearing 24. The outer ring of the bearing 24 is in transitional fit with the rotor body 26, and the inner ring of the bearing 24 is in interference fit with the outer peripheral surface of the cantilever shaft 15. Since the cantilever shaft 15 is a metal part, the bearing 24 and the cantilever shaft 15 are in interference fit, so that the installation accuracy and stability of the bearing 24 are both good. Since the cantilever shaft 15 and the bearing 24 are in interference fit, if one end face 152 of the cantilever shaft 15 is covered inside the closed end 142, during the installation process of the bearing 24, only the stator body 11 can be fixed, and one end of the cantilever shaft 15 cannot be directly fixed. The structural strength of the stator body 11 is low, the fixing effect on one end of the cantilever shaft 15 is poor, and it is easy to be damaged under the relatively large installation pressure of the bearing 24.

[0073] In the embodiment of the present application, one end face 152 of the cantilever shaft 15 is exposed outside the outer wall surface 1421 of the closed end 142. Therefore, when installing the bearing 24, one end face 152 of the cantilever shaft 15 can be directly clamped and fixed. The fixing effect on the cantilever shaft 15 is good, and the cantilever shaft 15 is not easy to move under the installation pressure. The influence of the bearing 24 installation process on the rotor body 26 is small, and the possibility of damage to the rotor body 26 during the installation process of the bearing 24 is reduced.

[0074] According to some embodiments of the present invention, reference may be made to Figure 3 , Figure 4 , Figure 6 and Figure 7 , the strengthening structure includes a strengthening convex part 41 and a first strengthening rib 42 provided on the closed end 142. One end of the cantilever shaft 15 passes through the strengthening convex part 41 and is fixedly connected to the strengthening convex part 41. The first strengthening rib 42 is connected between the strengthening convex part 41 and the wall surface of the closed end 142.

[0075] Specifically, the strengthening convex part 41 can axially F protrude outward relative to the closed end 142, that is, the strengthening convex part 41 is located outside the accommodation cavity 141; or, as Figure 3 , Figure 4 , Figure 6and Figure 7 As shown in Figure 7 , the reinforcing protrusion 41 can protrude axially F inward relative to the closed end 142, that is, the reinforcing protrusion 41 is located within the accommodation cavity 141.

[0076] The cantilever shaft 15 is an installation structure for supporting the rotation of the rotor assembly 20. One end of the cantilever shaft 15 is fixed, and the other end of the cantilever shaft 15 is suspended. The longer the cantilever shaft 15 is, the farther it is from the closed end 142, and the worse the support strength will be, and the more likely it is to have radial runout. In the embodiment of the present application, a reinforcing protrusion 41 is provided at the closed end 142. One end of the cantilever shaft 15 passes through the reinforcing protrusion 41 and is fixedly connected to the reinforcing protrusion 41. Thus, the connection area between the cantilever shaft 15 and the stator body 11 is larger, which is beneficial to increasing the installation strength and stability of the cantilever shaft 15, and reducing the problems that the radial runout of the rotor assembly 20 during rotation causes the deterioration of the motor noise and affects the stability of the motor.

[0077] At the same time, a first reinforcing rib 42 is provided to connect the reinforcing protrusion 41 and the wall surface of the closed end 142, so as to enhance the structural strength of the reinforcing protrusion 41, reduce the possibility of deformation of the reinforcing protrusion 41, and further increase the installation strength and stability of the cantilever shaft 15.

[0078] In some embodiments, the reinforcing protrusion 41 and the first reinforcing rib 42 can be integrally formed with the stator insulator 14 to reduce the number of components and assembly processes. At the same time, the integrality between the reinforcing protrusion 41 and the stator insulator 14 is better, and it is not easy to separate between the reinforcing protrusion 41 and the stator insulator 14. It can be understood that the axial F and radial dimensions of the reinforcing protrusion 41 need to meet the forming and operating conditions of the air-conditioning fan 1000.

[0079] According to some embodiments of the present invention, reference can be made to Figure 3 , a concave cavity 1422 is formed by the middle part of the closed end 142 recessing in a direction away from the open end 143. The reinforcing protrusion 41 is formed on the bottom wall of the concave cavity 1422, and a first reinforcing rib 42 is connected between the reinforcing protrusion 41 and the wall surface of the concave cavity 1422.

[0080] That is to say, only a part of the closed end 142 recesses in a direction away from the open end 143 to form the concave cavity 1422. Compared with directly increasing the axial F distance between the entire closed end 142 and the open end 143, only the middle part of the closed end 142 recesses in a direction away from the open end 143 to form the concave cavity 1422. In this way, the volume of the stator body 11 is smaller, the mass is lighter, and the closed end 142 is formed with the concave cavity 1422. In this way, the overall structural strength of the closed end 142 is also higher, and it is not easy to deform. The reinforcing protrusion 41 is formed on the bottom wall of the concave cavity 1422, so that the reinforcing protrusion 41 is not easy to deform and shake either, and further increase the installation strength and stability of the cantilever shaft 15.

[0081] Specifically, the first reinforcing rib 42 is connected between the reinforcing convex part 41 and the radial and circumferential wall surfaces of the concave cavity 1422, so that the connection area between the first reinforcing rib 42 and the closed end 142 is larger, and the supporting effect on the reinforcing convex part 41 is better.

[0082] Exemplarily, the first reinforcing rib 42 can be a strip-shaped reinforcing rib, or the first reinforcing rib 42 can be a triangular reinforcing rib, or the first reinforcing rib 42 can also be a trapezoidal reinforcing rib, etc., which are not specifically limited herein.

[0083] According to some embodiments of the present invention, reference can be made to Figure 3 、 Figure 4 、 Figure 7 and Figure 9 The reinforcing structure includes a second reinforcing rib 43. The second reinforcing rib 43 is located in the accommodating cavity 141 and is connected to the circumferential wall surface of the closed end 142 and the accommodating cavity 141.

[0084] Specifically, the second reinforcing rib 43 is connected between the circumferential edge of the closed end 142 and the circumferential wall surface of the accommodating cavity 141. By providing the second reinforcing rib 43 to strengthen the closed end 142, it is beneficial to further reduce the possibility of the closed end 142 deforming under the action of the cantilever shaft 15, and thus it is beneficial to further increase the installation strength and stability of the cantilever shaft 15. Compared with increasing the overall thickness of the part of the closed end 142 where there is no concave cavity 1422 as a whole, only arranging a plurality of second reinforcing ribs 43 to strengthen the part of the closed end 142 where there is no concave cavity 1422, in this way, the mass of the stator body 11 is lighter, which is beneficial to the lightweight design of the air-conditioning blower motor 100.

[0085] The wall body of the closed end 142 where the concave cavity 1422 is formed is the first wall body, the circumferential edge of the closed end 142 is the second wall body, the second wall body can be connected to the first wall body and the circumferential wall body of the accommodating cavity 141, and the circumferential wall body of the accommodating cavity 141 and the second wall body play a role in supporting the first wall body.

[0086] Exemplarily, the second reinforcing rib 43 can be a strip-shaped reinforcing rib, or the second reinforcing rib 43 can be a triangular reinforcing rib, or the second reinforcing rib 43 can also be a trapezoidal reinforcing rib, etc., which are not specifically limited herein.

[0087] In some embodiments, the second reinforcing rib 43 or the first reinforcing rib 42 can also be directly connected between the wall surface of the concave cavity 1422 and the wall surface of the accommodating cavity 141.

[0088] According to some embodiments of the present invention, such as Figure 7 and Figure 9As shown, a plurality of first reinforcing ribs 42 and a plurality of second reinforcing ribs 43 are formed on one side wall surface of the closed end 142 facing the accommodating cavity 141. The plurality of first reinforcing ribs 42 are arranged at intervals in the circumferential direction, the plurality of second reinforcing ribs 43 are arranged at intervals in the circumferential direction, and the second reinforcing ribs 43 and the first reinforcing ribs 42 are arranged in a one-to-one correspondence in the radial direction.

[0089] That is to say, the second reinforcing rib 43 is arranged on the force transmission path of the first reinforcing rib 42. When the first reinforcing rib 42 exerts a force on the closed end 142, the second reinforcing rib 43 can better transmit the force, so that the closed end 142 is not easily deformed, so as to further increase the installation strength and stability of the cantilever shaft 15.

[0090] Specifically, the plurality of first reinforcing ribs 42 are arranged at uniform intervals in the circumferential direction, and the plurality of second reinforcing ribs 43 are arranged at uniform intervals in the circumferential direction.

[0091] According to some embodiments of the present invention, reference may be made to Figure 3 and Figure 8 As shown, at least one recess 146 is provided on the outer peripheral surface of the end portion of the stator insulator 14 close to the closed end 142. The recess 146 extends along the circumferential direction of the stator insulator 14. The reinforcing structure includes a third reinforcing rib 44 provided in the recess 146, and the third reinforcing rib 44 connects the bottom wall and the side wall of the recess 146.

[0092] Exemplarily, the recess 146 is defined between the outer circumferential wall surface of the portion of the closed end 142 where the concave cavity 1422 is formed and the outer wall surface of the circumferential edge of the closed end 142.

[0093] By providing the recess 146 on the outer peripheral surface of the end portion of the stator insulator 14 close to the closed end 142 and simultaneously providing the third reinforcing rib 44 to strengthen the position where the recess 146 is provided, on the one hand, the volume and weight of the stator insulator 14 can be reduced, which is beneficial to the lightweight and miniaturized design of the air-conditioning blower motor 100; on the other hand, the end portion of the stator insulator 14 close to the closed end 142 can also have better structural strength, and the fixing strength and stability between the stator insulator 14 and the cantilever shaft 15 are also better.

[0094] It should be noted that the recess 146 is located on the axial F side of the stator winding 17 and the stator core 12, that is, the setting position of the recess 146 avoids the stator winding 17 and the stator core 12, so that the stator insulator 14 has a good fixing effect on the stator winding 17 and the stator core 12.

[0095] Exemplarily, reference may be made to Figure 3As shown, a plurality of recesses 146 may be provided along the axial direction F. Along the axial direction F and in the direction close to the closed end 142, the radius of the circumferential wall surface of the plurality of recesses 146 gradually decreases. On the one hand, it is convenient for molding and demolding. On the other hand, the size and volume of the stator body 11 can also be smaller, and at the same time, the structural strength of the end of the stator insulator 14 close to the closed end 142 is relatively high.

[0096] Exemplarily, the recesses 146 may be arranged around the stator insulator 14, or the recesses 146 may also be only arc-shaped recesses 146, and a plurality of arc-shaped recesses 146 are arranged at intervals along the circumferential direction of the stator insulator 14.

[0097] Exemplarily, the third reinforcing rib 44 may be a strip-shaped reinforcing rib, or the third reinforcing rib 44 may be a triangular reinforcing rib, or the third reinforcing rib 44 may also be a trapezoidal reinforcing rib, etc., and no specific limitation is made here.

[0098] According to some embodiments of the present invention, reference may be made to Figure 3 and Figure 8 , a plurality of recesses 146 are provided, and the third reinforcing ribs 44 of adjacent recesses 146 are arranged in one-to-one correspondence in the radial direction.

[0099] That is to say, the third reinforcing rib 44 on the radially outer side is located on the force transmission path of the third reinforcing rib 44 on the radially inner side. When the third reinforcing rib 44 on the radially inner side is stressed, the third reinforcing rib 44 on the radially outer side can better transmit the acting force, so that the closed end 142 is not easily deformed, so as to achieve the effect of further increasing the installation strength and stability of the cantilever shaft 15.

[0100] According to some embodiments of the present invention, reference may be made to Figure 8 and Figure 9 , a plurality of connecting lugs 147 are provided on the circumferential side wall of the stator insulator 14, and the connecting lugs 147 are provided with second connecting portions 148, and the second connecting portions 148 are used for the installation of the stator assembly 10, that is, the connecting lugs 147 are used to install the air-conditioning fan motor 100 on an external support member.

[0101] More specifically, the connecting lugs 147 are provided on the radially outer side of the stator winding 17 and the stator core 12. The stator core 12 and the stator winding 17 are relatively heavy. The connecting lugs 147 are arranged corresponding to the stator core 12 and the stator winding 17 in the radial direction. In this way, the connecting lugs 147 can better support the stator body 11, which is beneficial to reducing the vibration degree of the stator body 11 during operation.

[0102] In some embodiments, a buffer member 149 is provided at the second connecting portion 148. It should be noted that the second connecting portion 148 is used to be connected to an external support member through a connecting member, and the buffer member 149 is provided between the connecting member and the second connecting portion 148 to reduce the possibility of direct contact between the connecting member and the second connecting portion 148. The buffer member 149 functions to buffer and dampen vibrations, thereby helping to reduce the operating noise generated by the air-conditioning blower motor 100 during operation.

[0103] Exemplarily, reference may be made to Figure 8 and Figure 9 where the second connecting portion 148 is a connecting hole that penetrates axially along F. The connecting hole has an opening 1481 on the side facing away from the stator insulator 14 in the radial direction. A cylindrical buffer member 149 is inserted through the connecting hole. The size of the opening 1481 is smaller than the outer diameter of the cylindrical buffer member 149. The opening 1481 is provided to facilitate the installation of the cylindrical buffer member 149. Since the size of the opening 1481 is smaller than the outer diameter of the cylindrical buffer member 149, the cylindrical buffer member 149 is not easily disengaged from the opening 1481. Limited protrusions 1491 are formed at both ends of the cylindrical buffer member 149. The connecting ear 147 is formed with a sunk groove 1471 for accommodating the limited protrusions 1491. The outer diameter of the limited protrusions 1491 is larger than the outer diameter of the middle part of the cylindrical buffer member 149. Thus, the limited protrusions 1491 can limit the cylindrical buffer member 149, making it not easily axially disengage from the connecting hole along F. The sunk groove 1471 can position the radial installation position of the cylindrical buffer member 149 to reduce the possibility of the cylindrical buffer member 149 slipping.

[0104] According to some embodiments of the present invention, the stator insulator 14 is injection-molded and connected to one end of the cantilever shaft 15.

[0105] Compared with connecting the cantilever shaft 15 and the stator insulator 14 by means of threaded connection or other connection methods, the stator insulator 14 is injection-molded and connected to one end of the cantilever shaft 15. In this way, the connection stability between the stator insulator 14 and the cantilever shaft 15 is better, the stator insulator 14 is not easily disengaged, and the installation accuracy of the cantilever shaft 15 is also higher. At the same time, the connection between the stator insulator 14 and the cantilever shaft 15 does not require additional assembly steps, which is conducive to improving the assembly efficiency of the air-conditioning blower motor 100.

[0106] According to some embodiments of the present invention, reference may be made to Figure 5 and Figure 10 where a groove 154 is provided on the circumferential side wall of one end of the cantilever shaft 15, and the closed end 142 covers the groove 154.

[0107] According to some embodiments of the present invention, a protrusion is provided on the circumferential side wall of one end of the cantilever shaft 15, and the closed end 142 covers the protrusion.

[0108] According to some embodiments of the present utility model, a groove 154 and a protrusion are provided on the circumferential side wall of one end of the cantilever shaft 15, and the closed end 142 covers the groove 154 and the protrusion.

[0109] Exemplarily, only one groove 154 may be provided, or multiple grooves 154 may be provided. Exemplarily, only one protrusion may be provided, or multiple protrusions may be provided.

[0110] One end of the cantilever shaft 15 is connected to the closed end 142 of the stator insulator 14. By providing a groove 154 and a protrusion on the circumferential side wall of one end of the cantilever shaft 15, the connection area between the cantilever shaft 15 and the stator insulator 14 can be increased, the bonding force between the cantilever shaft 15 and the stator insulator 14 can be increased, and the possibility of the cantilever shaft 15 being axially disengaged from the stator insulator 14 in the F direction can be reduced, which is beneficial to increasing the installation stability and installation strength of the cantilever shaft 15.

[0111] In some embodiments, the stator assembly 10 of the air-conditioning fan motor further includes a pin 16 for connecting the stator winding 17 and the power supply. The stator insulator 14 is injection-molded to connect the pin 16 (as Figure 8 shown), the stator winding 17, the stator core 12, and the insulating bracket 131.

[0112] In some embodiments, during the process of injection-molding the stator insulator 14, the connection between the stator core 12 and the stator winding 17 and the stator insulator 14 can be realized, that is, the stator insulator 14 is injection-molded to connect the stator core 12 and the stator winding 17, so as to further increase the structural strength of the stator body 11 and reduce the risk of the stator winding 17 axially moving in the F direction and the stator core 12 being disengaged and thrown out during the rotation of the stator body 11; at the same time, the stator insulator 14 covers the stator core 12 and the stator winding 17 to play a role in waterproof insulation.

[0113] Exemplarily, the stator insulator 14 may be a BMC (bulk molding compound) material part. The bulk molding compound has excellent flow characteristics, insulation, and flame retardancy, is easy to process, and the stator insulator 14 made of BMC has better insulation and flame retardancy performance.

[0114] Next, the stator assembly 10 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.

[0115] As Figures 1 - 11As shown in the figure, the stator assembly 10 of the air-conditioning fan motor according to a specific embodiment of the present utility model includes a stator core 12, a stator winding 17, a stator insulator 14 and a cantilever shaft 15. The stator insulator 14 covers the stator core 12 and the stator winding 17. The stator insulator 14 has a receiving cavity 141. One axial end of the receiving cavity 141 is a closed end 142, and the other axial end of the receiving cavity 141 is an open mouth 143. The open mouth 143 is used for installing the rotor assembly 20 in the receiving cavity 141, and the closed end 142 is provided with a strengthening structure; the cantilever shaft 15 is located in the receiving cavity 141 and is used for rotatably cooperating with the rotor assembly 20. One end of the cantilever shaft 15 is fixedly connected to the closed end 142. The stator insulator 14 is injection-molded and connected to one end of the cantilever shaft 15. One end face 152 of the cantilever shaft 15 is exposed outside the outer wall surface 1421 of the closed end 142. The axial dimension of the stator assembly 10 is small, the number of components is small, and the volume is small, which is beneficial to the miniaturized design of the air-conditioning fan 1000.

[0116] The strengthening structure includes a strengthening convex portion 41 and a first strengthening rib 42 provided on the closed end 142. One end of the cantilever shaft 15 passes through the strengthening convex portion 41 and is fixedly connected to the strengthening convex portion 41. The first strengthening rib 42 is connected between the strengthening convex portion 41 and the wall surface of the closed end 142.

[0117] The middle part of the closed end 142 is recessed in a direction away from the open mouth 143 to form a concave cavity 1422. The strengthening convex portion 41 is formed on the bottom wall of the concave cavity 1422. A first strengthening rib 42 is connected between the strengthening convex portion 41 and the wall surface of the concave cavity 1422. The strengthening structure includes a second strengthening rib 43. The second strengthening rib 43 is located in the receiving cavity 141 and connects the closed end 142 and the circumferential wall surface of the receiving cavity 141. A plurality of first strengthening ribs 42 and a plurality of second strengthening ribs 43 are formed on the side wall of the closed end 142 facing the receiving cavity 141. The plurality of first strengthening ribs 42 are arranged at intervals in the circumferential direction, and the plurality of second strengthening ribs 43 are arranged at intervals in the circumferential direction. The second strengthening ribs 43 and the first strengthening ribs 42 are arranged in one-to-one correspondence in the radial direction.

[0118] Two recesses 146 are provided on the outer peripheral surface of the end of the stator insulator 14 close to the closed end 142. The recesses 146 extend around the circumference of the stator insulator 14. The strengthening structure includes a third strengthening rib 44 provided in the recesses 146. The third strengthening rib 44 connects the bottom wall and the side wall of the recess 146. The third strengthening ribs 44 of the two recesses 146 are arranged in one-to-one correspondence in the radial direction.

[0119] In this way, the closed end 142 has a small volume and high structural strength, which is beneficial to improving the installation stability and reliability of the cantilever shaft 15.

[0120] The circumferential side wall of the stator insulator 14 is provided with a plurality of connecting lugs 147. The connecting lugs 147 are provided with second connecting portions 148 for the installation of the stator assembly 10, and buffer members 149 are provided at the second connecting portions 148. The circumferential side wall of one end of the cantilever shaft 15 is provided with a groove, and the closed end 142 covers the groove to increase the connection area between the cantilever shaft 15 and the stator insulator 14.

[0121] Reference may be made to Figures 1 - 3 , and in the second aspect of the present invention, an air-conditioning fan motor 100 is further proposed.

[0122] The air-conditioning fan motor 100 according to the embodiment of the second aspect of the present invention includes the stator assembly 10 of the air-conditioning fan motor in the above embodiment. Since the stator assembly 10 of the air-conditioning fan motor according to the embodiment of the present invention has the above beneficial technical effects, the stator assembly 10 of the air-conditioning fan motor 100 according to the embodiment of the present invention includes a stator body 11 and a cantilever shaft 15. One end of the cantilever shaft 15 is fixed to the stator body 11, and a plurality of components for forming the bearing 24 chamber at both ends of the stator body 11 are cancelled. Therefore, the number of components of the stator assembly 10 is smaller; the cantilever shaft 15 and the rotor assembly 20 are rotatably matched, and only the rotor assembly 20 rotates relative to the stator assembly 10 to drive the fan blade 30 to rotate, and the cantilever shaft 15 does not need to be connected to the fan blade 30. Therefore, the axial length F of the cantilever shaft 15 is much smaller than the rotating shaft of the air-conditioning fan motor with an inner rotor structure in the related art, that is, the axial dimension F of the cantilever shaft 15 is smaller; thus, the axial dimension F and the number of components of the air-conditioning fan motor 100 can be reduced, the axial F space occupied by the air-conditioning fan motor 100 can be reduced, and further the volume and structural complexity of the air-conditioning fan motor 100 can be reduced, which is beneficial to the miniaturization and lightweight design of the air-conditioning fan motor 100.

[0123] According to some embodiments of the present invention, as Figure 2 and Figure 3 shown, the air-conditioning fan motor 100 further includes a rotor body 26 and a bearing 24. The cantilever shaft 15 passes through the bearing 24 and cooperates with the rotor body 26 through the bearing 24.

[0124] The rotor body 26 may include 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.

[0125] The outer ring of the bearing 24 is fitted with the rotor body 26, and the inner ring of the bearing 24 is used to pass through and cooperate with the cantilever shaft 15 so that the rotor insulator 23 can rotate relative to the cantilever shaft 15; one axial F end of the rotor insulator 23 has a first connecting portion 235, and the second connecting portion 235 is used to connect the fan blade 30. That is to say, the cantilever shaft 15 cooperates 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.

[0126] The cantilever shaft 15 is provided with a stopper 151. Specifically, the stopper 151 can be snap-fitted with 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. The stopper 151 is used to limit the axial F position of the bearing 24 to reduce the possibility of the bearing 24 axially F moving relative to the cantilever shaft 15.

[0127] The distance between the stopper 151 closest 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 stopper 151 in the axial F direction and the stopper 151 is greater than zero. That is to say, the stopper 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 stopper 151 can be reduced, and thus the possibility of deformation and damage of the stator body 11 can be reduced.

[0128] In some embodiments, the distance between the stopper 151 closest to the closed end 142 and the reinforcing convex portion 41 is greater than zero to reduce the possibility that the pressure of the rotor insulator 23 on the bearing 24 is transmitted to the reinforcing convex portion 41 and reduce the possibility of damage and deformation of the reinforcing convex portion 41.

[0129] Exemplarily, the distance between the stopper 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. Under the condition that the process and the strength of the stopper 151 permit, the smaller the distance between the stopper 151 close to the closed end 142 and the closed end 142, the better, to reduce the torque received at the end of the cantilever shaft 15 connected to the closed end 142.

[0130] Specifically, the stopper 151 can be a circlip retaining ring, and the cantilever shaft 15 is provided with a groove 155 for installing the circlip retaining ring. During installation, the circlip retaining ring is clamped in the groove 155, with a simple structure and convenient installation.

[0131] According to some embodiments of the present utility model, the air-conditioning fan motor 100 further includes two annular flanges, namely 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 body 26, and the second annular flange 144 is connected to the end of the stator body 11 having an 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, and the outer peripheral surface of the second annular flange 144 extends obliquely inward in the direction of the stator assembly 10 along the axial direction F.

[0132] According to some embodiments of the present utility model, reference may be made to Figure 2 and Figure 3 , the air-conditioning fan motor 100 further includes two annular flanges, namely 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, 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, the second annular flange 144 is located radially inside the first annular flange 236, and the outer peripheral surface of the first annular flange 236 extends obliquely inward in the direction away from the stator body 11 along the axial direction F.

[0133] It should be noted that the annular flange located on the outer ring can play a role in blocking water. When water flows radially (or from top to bottom) towards the stator body 11, the annular flange 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.

[0134] 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 the direction of the stator assembly 10 along the axial direction F. Thus, the second annular flange 144 can conduct the water in the direction of the stator assembly 10 along the axial direction F, that is, in the 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 the direction away from the stator body 11 along the axial direction F. Thus, the first annular flange 236 can conduct the water in the direction away from the stator body 11, that is, in the direction away from the mating gap between the rotor insulator 23 and the stator body 11; thereby, 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.

[0135] 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.

[0136] 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.

[0137] In some embodiments, the air-conditioning blower motor 100 may further include a third annular flange 145, which can be referred to Figure 2 and Figure 3 , 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 beneficial to further increase the waterproofness of the air-conditioning blower motor 100.

[0138] As Figure 12 shown, the air-conditioning blower 1000 according to the embodiment of the present invention includes the air-conditioning blower motor 100 according to the embodiment of the present invention. Since the air-conditioning blower motor 100 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the stator assembly 10 of the air-conditioning blower 1000 according to the embodiment of the present invention includes a stator body 11 and a cantilever shaft 15. One end of the cantilever shaft 15 is fixed to the stator body 11, and a plurality of components for forming the bearing 24 chamber at both ends of the stator body 11 are cancelled. Therefore, the stator assembly 10 has fewer components; the cantilever shaft 15 and the rotor assembly 20 are rotatably matched, and only the rotor assembly 20 rotates relative to the stator assembly 10 to drive the fan blade 30 to rotate. The cantilever shaft 15 does not need to be connected to the fan blade 30. Therefore, the axial length F of the cantilever shaft 15 is much smaller than the rotating shaft of the air-conditioning blower motor with an inner rotor structure in the related art, that is, the axial dimension F of the cantilever shaft 15 is smaller; thus, the axial dimension F and the number of components of the air-conditioning blower motor 100 can be reduced, the axial F space occupied by the air-conditioning blower motor 100 can be reduced, and further the volume and structural complexity of the air-conditioning blower motor 100 can be reduced, which is beneficial to the miniaturization and lightweight design of the air-conditioning blower motor 100.

[0139] As shown Figure 13 in the figure, the air conditioner 2000 according to an embodiment of the present invention includes an air conditioner fan 1000 according to an embodiment of the present invention. Since the air conditioner fan 1000 according to an embodiment of the present invention has the above beneficial technical effects, for the air conditioner 2000 according to an embodiment of the present invention, the stator assembly 10 includes a stator body 11 and a cantilever shaft 15. One end of the cantilever shaft 15 is fixed to the stator body 11, and a plurality of components for forming the bearing 24 chamber at both ends of the stator body 11 are cancelled. Therefore, the number of components of the stator assembly 10 is smaller; the cantilever shaft 15 and the rotor assembly 20 are rotatably matched, and only the rotor assembly 20 rotates relative to the stator assembly 10 to drive the fan blade 30 to rotate. The cantilever shaft 15 does not need to be connected to the fan blade 30. Therefore, the axial length F of the cantilever shaft 15 is much smaller than the axial dimension of the rotating shaft of the air conditioner fan motor with an inner rotor structure in the related art, that is, the axial dimension F of the cantilever shaft 15 is smaller; thus, the axial dimension F and the number of components of the air conditioner fan motor 100 can be reduced, the axial space occupied by the air conditioner fan motor 100 can be reduced, and further the volume and the structural complexity of the air conditioner fan motor 100 can be reduced, which is beneficial to the miniaturization and light weight design of the air conditioner fan motor 100.

[0140] The other configurations and operations of the air conditioner fan motor 100, the air conditioner 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.

[0141] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can 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.

[0142] In the description of this specification, the descriptions referring to terms such as "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 invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0143] Although 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. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A stator assembly of an air conditioner fan motor, characterized in that, Comprising: A stator core, a stator winding, and a stator insulator. The stator insulator wraps the stator core and the stator winding. The stator insulator has a receiving cavity. One axial end of the receiving cavity is a closed end, and the other axial end of the receiving cavity is an open mouth. The open mouth is used for installing a rotor assembly in the receiving cavity, and the closed end is provided with a strengthening structure; A cantilever shaft located in the receiving cavity and used for rotatably cooperating with the rotor assembly. One end of the cantilever shaft is fixedly connected to the closed end.

2. The stator assembly of the air-conditioning fan motor according to claim 1, characterized in that, One end face of the cantilever shaft is exposed outside the outer wall surface of the closed end.

3. The stator assembly of the air-conditioning blower motor according to claim 1, characterized in that, The strengthening structure includes a strengthening convex part and a first strengthening rib provided on the closed end. One end of the cantilever shaft passes through the strengthening convex part and is fixedly connected to the strengthening convex part. The first strengthening rib is connected between the strengthening convex part and the wall surface of the closed end.

4. The stator assembly of the air conditioner blower motor according to claim 3, characterized in that, The middle part of the closed end is recessed in a direction away from the open mouth to form a concave cavity. The strengthening convex part is formed on the bottom wall of the concave cavity, and the first strengthening rib is connected between the strengthening convex part and the wall surface of the concave cavity.

5. The stator assembly of the air-conditioning fan motor according to claim 1, characterized in that, The strengthening structure includes a second strengthening rib. The second strengthening rib is located in the receiving cavity and connects the closed end and the circumferential wall surface of the receiving cavity.

6. The stator assembly of the air conditioner blower motor according to claim 1, wherein, A plurality of first strengthening ribs and a plurality of second strengthening ribs are formed on the side wall of the closed end facing the receiving cavity. The plurality of first strengthening ribs are arranged at intervals in the circumferential direction, and the plurality of second strengthening ribs are arranged at intervals in the circumferential direction. The second strengthening ribs and the first strengthening ribs are arranged in a one-to-one correspondence in the radial direction.

7. The stator assembly of the air-conditioning fan motor according to claim 1, characterized in that, At least one concave part is provided on the outer peripheral surface of the end of the stator insulator near the closed end. The concave part extends along the circumferential direction of the stator insulator. The strengthening structure includes a third strengthening rib provided in the concave part. The third strengthening rib connects the bottom wall and the side wall of the concave part.

8. The stator assembly of the air-conditioning fan motor according to claim 7, characterized in that, A plurality of the concave parts are provided, and the third strengthening ribs of adjacent concave parts are arranged in a one-to-one correspondence in the radial direction.

9. The stator assembly of the air-conditioning fan motor according to claim 1, characterized in that, A plurality of connecting ears are provided on the circumferential side wall of the stator insulator. The connecting ears are provided with second connecting parts for installing the stator assembly, and buffer members are provided at the second connecting parts.

10. The stator assembly of the air-conditioning fan motor according to claim 1, characterized in that, The stator insulator is injection-molded and connected to one end of the cantilever shaft.

11. The stator assembly of the air-conditioning fan motor according to claim 10, characterized in that, A groove and / or a protrusion are provided on the circumferential side wall of one end of the cantilever shaft, and the closed end wraps the groove and / or the protrusion.

12. An air conditioner blower motor, characterized in that, Comprising the stator assembly of the air-conditioning fan motor according to any one of claims 1-11.

13. The air-conditioning blower motor according to claim 12, characterized in that, It further includes a rotor body and a bearing. The cantilever shaft passes through the bearing and cooperates with the rotor body through the bearing. The cantilever shaft is provided with a stopper for limiting the axial position of the bearing. Among them, the distance between the stopper closest to the closed end and the closed end is greater than zero.

14. The air-conditioning fan motor according to claim 13, characterized in that, It further includes two annular flanges, namely a first annular flange and a second annular flange respectively. The first annular flange is connected to the outer peripheral wall of the rotor body. The stator assembly includes a stator body, and the stator body includes a stator core, a stator winding and a stator insulator. The second annular flange is connected to the end of the stator body having the open end. The first annular flange is arranged to surround the second annular flange, and the outer peripheral surface of the second annular flange extends axially in a direction close to the stator assembly and inclines inwards; or, The second annular flange is arranged to surround the first annular flange, and the outer peripheral surface of the first annular flange extends axially in a direction away from the stator body and inclines inwards.

15. An air-conditioning fan, characterized in that, It includes the air-conditioning fan motor according to any one of claims 12-14.

16. An air conditioner, characterized in that, It includes the air-conditioning fan according to claim 15.

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