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

Abstract

The invention 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] This invention relates to the field of air conditioner fan motor technology, 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 Technology

[0002] As one of the main components of air conditioners, permanent magnet motors for fans will inevitably develop towards miniaturization and lightweighting in the face of market cost pressures.

[0003] The air conditioner fan motors in related technologies have problems such as long axial dimensions, large size, and many parts, which need to be further improved. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a stator assembly for an air conditioner fan motor that can shorten the axial dimension and volume of the air conditioner fan motor, and also reduce the number of parts.

[0005] Another object of the present invention is to provide an air conditioner fan motor having the stator assembly of the above-mentioned air conditioner fan motor.

[0006] Another object of the present invention is to provide an air conditioner fan having the above-mentioned air conditioner fan motor.

[0007] Another object of the present invention is to provide an air conditioner having the above-mentioned air conditioning fan.

[0008] According to an embodiment of the present invention, the stator assembly of an air conditioner fan motor 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 which is a closed end, and the other axial end of which is an open opening. The open opening is used to mount a rotor assembly into the receiving cavity. The closed end is provided with a reinforcing structure. A cantilever shaft is located in the receiving cavity and is used to rotatably engage with the rotor assembly. One end of the cantilever shaft is fixedly connected to the closed end.

[0009] According to an embodiment of the present invention, the stator assembly of an air conditioner fan motor includes a stator body and a cantilever shaft. One end of the cantilever shaft is fixed to the stator body, eliminating multiple components at both ends of the stator body used to form bearing chambers. Therefore, the number of components in the stator assembly is reduced. The cantilever shaft and the rotor assembly are rotatably coupled, with only the rotor assembly rotating relative to the stator assembly to drive the fan blades to rotate. The cantilever shaft does not need to be connected to the fan blades. Therefore, the axial length of the cantilever shaft is much smaller than the shaft of the internal rotor structure air conditioner fan motor in the related art, i.e., the axial dimension of the cantilever shaft is smaller. Thus, the axial dimension and number of components of the air conditioner fan motor can be reduced, the axial space occupied by the air conditioner fan motor can be reduced, and the volume and structural complexity of the air conditioner fan motor can be reduced, which is conducive to the miniaturization and lightweight design of the air conditioner fan motor.

[0010] In addition, the stator assembly of the air conditioner fan motor according to the above embodiments of the present invention may also have the following additional technical features:

[0011] According to some embodiments of the present invention, one end face of the cantilever shaft is exposed on the outer wall surface of the closed end.

[0012] According to some embodiments of the present invention, the reinforcing structure includes a reinforcing protrusion and a first reinforcing rib disposed at the closed end, one end of the cantilever shaft passes through the reinforcing protrusion and is fixedly connected to the reinforcing protrusion, and the first reinforcing rib is connected between the reinforcing protrusion and the wall surface of the closed end.

[0013] According to some embodiments of the present invention, the middle portion of the closed end is recessed in a direction away from the open opening to form a cavity, the reinforcing protrusion is formed on the bottom wall of the cavity, and the first reinforcing rib is connected between the reinforcing protrusion and the wall surface of the cavity.

[0014] According to some embodiments of the present invention, the reinforcing structure includes a second reinforcing rib, which is located in the receiving cavity and connects the closed end and the circumferential wall of the receiving cavity.

[0015] According to some embodiments of the present invention, a plurality of first reinforcing ribs and a plurality of second reinforcing ribs are formed on the side wall of the closed end facing the receiving cavity. The plurality of first reinforcing ribs are arranged circumferentially spaced apart, and the plurality of second reinforcing ribs are arranged circumferentially spaced apart. The second reinforcing ribs and the first reinforcing ribs are arranged in a radially corresponding manner.

[0016] According to some embodiments of the present invention, the outer peripheral surface of the stator insulator near the closed end is provided with at least one recess, the recess extending circumferentially along the stator insulator, and the reinforcing structure including a third reinforcing rib provided in the recess, the third reinforcing rib connecting the bottom wall and the side wall of the recess.

[0017] According to some embodiments of the present invention, the recess is provided with a plurality of recesses, and the third reinforcing ribs of adjacent recesses are arranged in a radially corresponding manner.

[0018] According to some embodiments of the present invention, the circumferential sidewall of the stator insulator is provided with a plurality of connecting ears, each connecting ear having a second connecting portion for mounting the stator assembly, and a buffer member being provided at the second connecting portion.

[0019] According to some embodiments of the present invention, the stator insulator is injection molded to one end of the cantilever shaft.

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

[0021] The air conditioner fan motor according to an embodiment of the present invention includes a stator assembly of the air conditioner fan motor according to an embodiment of the present invention.

[0022] According to some embodiments of the present invention, the air conditioner fan 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 stop, the stop is used to limit the axial position of the bearing, wherein the distance between the stop closest to the closed end and the closed end is greater than zero.

[0023] According to some embodiments of the present invention, the air conditioner fan motor further includes two annular flanges, namely a first annular flange and a second annular flange, wherein the first annular flange is connected to the outer peripheral wall of the rotor body, and the second annular flange is connected to the end of the stator body having the open opening.

[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 inwardly at an incline; or...

[0025] The second annular flange is arranged around the first annular flange, and the outer peripheral surface of the first annular flange extends inwardly in a direction away from the stator body along the axial direction.

[0026] An air conditioning fan according to an embodiment of the present invention includes an air conditioning fan motor according to an embodiment of the present invention.

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

[0028] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

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

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

[0031] Figure 2 yes Figure 1 Sectional view of AA in the middle;

[0032] Figure 3 yes Figure 1 Cross-sectional view of the middle section (BB);

[0033] Figure 4 This is a first cross-sectional view of the stator assembly of an air conditioner fan motor according to an embodiment of the present invention;

[0034] Figure 5 for Figure 4 A structural diagram of section C;

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

[0036] Figure 7 This is a first perspective structural view of the stator assembly of an air conditioner fan motor according to an embodiment of the present invention;

[0037] Figure 8 This is a second perspective structural view of the stator assembly of an air conditioner fan motor according to an embodiment of the present invention;

[0038] Figure 9 This is a front view of the stator assembly of an air conditioner fan motor according to an embodiment of the present invention;

[0039] Figure 10 for Figure 2 A schematic diagram of the structure of part A;

[0040] Figure 11 for Figure 2 A structural diagram of section B;

[0041] Figure 12 This is a cross-sectional view of an air conditioning fan according to an embodiment of the present invention;

[0042] Figure 13 This is a schematic diagram of the structure of an air conditioner according to an embodiment of the present invention.

[0043] Figure label:

[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 support 131; stator insulator 14;

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

[0048] Opening 143; Second annular flange 144; Third annular flange 145; Recess 146;

[0049] Connecting ear 147; recess 1471; second connecting part 148; opening 1481;

[0050] Buffer component 149; Limiting boss 1491; Cantilever shaft 15; Stop component 151;

[0051] One end face 152 of the cantilever shaft 15; groove 154; slot 155; pin 16; stator winding 17.

[0052] Rotor assembly 20;

[0053] Magnet 22; Rotor insulator 23; First connecting part 235; First annular flange 236;

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

[0055] Fan blades 30;

[0056] Reinforcing protrusion 41; First reinforcing rib 42; Second reinforcing rib 43; Third reinforcing rib 44; Axial direction F. Detailed Implementation

[0057] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying 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 with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] In the description of this invention, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them, and "above," "over," and "on top" the second feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0060] Currently, air conditioner fan motors typically use a traditional internal rotor structure, where the shaft and internal rotor rotate together, transmitting the motor's output torque through the shaft. Because the shaft needs to rotate relative to the stator assembly, additional bearing housings are required at both ends of the stator assembly to support the bearings, allowing the shaft to rotate with the internal rotor. Furthermore, the shaft needs to extend a considerable distance beyond the stator assembly to accommodate the fan blades. This results in air conditioner fan motors having a long axial dimension, numerous components, large size, and complex structure.

[0061] This application proposes a stator assembly 10 for an air conditioner 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. This eliminates the need for multiple components at both ends of the stator body 11 that form bearing chambers, thus reducing the number of components in the stator assembly 10. The cantilever shaft 15 and the rotor assembly 20 are rotatably coupled. Only the rotor assembly 20 rotates relative to the stator assembly 10 to drive the fan blades 30 to rotate. The cantilever shaft 15 does not need to be connected to the fan blades 30, thus reducing the axial dimension F of the cantilever shaft 15. As a result, the axial dimension F and the number of components in the air conditioner fan motor 100 can be reduced, thereby reducing the size and structural complexity of the air conditioner fan motor 100, which is beneficial for the miniaturization and lightweight design of the air conditioner fan motor 100.

[0062] The stator assembly 10 of an air conditioner fan motor according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0063] Reference Figures 1-12As shown, the stator assembly 10 of the air conditioner fan motor according to an embodiment of the present invention 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 end of the receiving cavity 141 is a closed end 142, and the other axial end of the receiving cavity 141 is an open opening 143. The open opening 143 is used to install the rotor assembly 20 in the receiving cavity 141. The closed end 142 is provided with a reinforcing structure. The cantilever shaft 15 is located in the receiving cavity 141 and is used to rotatably engage 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 serves to fix the stator core 12 and the stator winding 17. On the other hand, the stator insulator 14 can reduce the possibility of the stator core 12 and the stator winding 17 coming into contact with air and moisture, which is beneficial to extending the service life of the stator core 12 and the stator winding 17.

[0065] In related technologies, the stator insulator includes an insulating body and end caps that cover the axial openings at both ends of the insulating body. The two end caps define bearing chambers for accommodating bearings. The bearings in the bearing chambers at both ends are used to pass through and support the rotating shaft. The rotating shaft is fixed to the rotor insulator. The rotor insulator drives the fan blades 30 mounted on the rotating shaft to rotate through the rotating shaft.

[0066] In this application, the stator insulator 14 has a receiving cavity 141. One end of the receiving cavity 141 along the axial direction F is a closed end 142, and the other end along the axial direction F is an open opening 143. The cantilever shaft 15 is located in the receiving cavity 141, and one end of the cantilever shaft 15 is directly and fixedly connected to the closed end 142. The end cap design is eliminated, resulting in better overall structural integrity of the stator insulator 14, fewer parts, smaller size, and easier assembly. Here, axial direction F refers to the extension direction of the central axis of the cantilever shaft 15.

[0067] The open end 143 is used to mount the rotor assembly 20 into the receiving cavity 141. That is, 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 an open end 143 to facilitate the installation of the rotor assembly 20. This also reduces the number of parts and facilitates assembly. The rotor assembly 20 is mounted in the receiving cavity 141, meaning that the air conditioner fan motor 100 in this application is an internal rotor motor, resulting in a more compact structure. The cantilever shaft 15 is used for rotatable engagement with the rotor assembly 20, meaning that only the rotor assembly 20 rotates relative to the stator body 11. The rotor assembly 20 is connected to the fan blades 30 to drive the fan blades 30 to rotate, and the fan blades 30 drive the gas flow. The cantilever shaft 15 is fixed relative to the stator body 11, and the cantilever shaft 15 only serves to support and limit the rotor assembly 20. Therefore, the axial dimension F of the cantilever shaft 15 can be designed to be shorter, which is beneficial for shortening the axial dimension F of the air conditioner fan motor 100.

[0068] The closed end 142 is provided with a reinforcing structure, which can be a reinforcing cavity formed by the stator insulator 14, a reinforcing rib provided in the stator insulator 14, etc. The reinforcing structure is used to strengthen the closed end 142 so that the closed end 142 has high structural strength, thereby enhancing the installation strength and stability of the cantilever shaft 15, reducing the radial runout of the rotor assembly 20 during rotation, which could lead to large operating noise in the air conditioner fan motor 100 and affect the operating stability of the air conditioner fan motor 100. At the same time, it also makes the stator body 11 less prone to damage and has a longer service life.

[0069] According to an embodiment of the present invention, the stator assembly 10 of the air conditioner fan motor 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 multiple components at both ends of the stator body 11 used to form the bearing 24 chambers. Therefore, the number of components in the stator assembly 10 is reduced. The cantilever shaft 15 and the rotor assembly 20 are rotatably coupled. Only the rotor assembly 20 rotates relative to the stator assembly 10 to drive the fan blades 30 to rotate. The cantilever shaft 15 does not need to be connected to the fan blades 30. Therefore, the axial length F of the cantilever shaft 15 is much smaller than the shaft of the internal rotor structure air conditioner fan motor 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 the volume and structural complexity of the air conditioner fan motor 100 can be reduced, which is conducive to the miniaturization and lightweight design of the air conditioner fan 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 on 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 connect the stator body 11 and the cantilever shaft 15 during the stator body 11 molding process. One end face 152 of the cantilever shaft 15 is exposed on the outer end face of the closed end 142, and the other end of the cantilever shaft 15 is suspended in the receiving 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 cantilever shaft 15 and reduce the possibility of axial movement of the cantilever shaft 15 during injection molding, which helps to make 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 transition-fitted to the rotor body 26, and the inner ring of the bearing 24 is interference-fitted to the outer circumferential surface of the cantilever shaft 15. Since the cantilever shaft 15 is a metal part, the interference fit between the bearing 24 and the cantilever shaft 15 provides good installation accuracy and stability. Due to the interference fit between the cantilever shaft 15 and the bearing 24, if one end face 152 of the cantilever shaft 15 is enclosed within the closed end 142, only the stator body 11 can be fixed during the installation of the bearing 24, and one end of the cantilever shaft 15 cannot be directly fixed. The stator body 11 has low structural strength, resulting in poor fixing effect on one end of the cantilever shaft 15, and is prone to damage under the large installation pressure of the bearing 24.

[0073] In this embodiment, one end face 152 of the cantilever shaft 15 is exposed on 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, resulting in a good fixing effect on the cantilever shaft 15. The cantilever shaft 15 is not easy to move under installation pressure, and the bearing 24 installation process has little impact on the rotor body 26, reducing the possibility of damage to the rotor body 26 during the installation of the bearing 24.

[0074] According to some embodiments of the present invention, reference can be made to Figure 3 , Figure 4 , Figure 6 and Figure 7 The reinforcing structure includes a reinforcing protrusion 41 and a first reinforcing rib 42 located 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. The first reinforcing rib 42 is connected between the reinforcing protrusion 41 and the wall surface of the closed end 142.

[0075] Specifically, the reinforcing protrusion 41 can protrude outward relative to the closed end 142 along the axial direction F, that is, the reinforcing protrusion 41 is located outside the receiving cavity 141; or, as Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, the reinforcing protrusion 41 can protrude inward relative to the closed end 142 along the axial direction F, that is, the reinforcing protrusion 41 is located inside the receiving cavity 141.

[0076] The cantilever shaft 15 is a mounting structure that supports the rotation of the rotor assembly 20. One end of the cantilever shaft 15 is fixed, and the other end is suspended. The longer the cantilever shaft 15 is, the farther it is from the closed end 142, the weaker the support strength will be, and the more prone it will be to radial runout. In this embodiment, 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. This increases the connection area between the cantilever shaft 15 and the stator body 11, which helps to increase the installation strength and stability of the cantilever shaft 15 and reduces the problem of radial runout of the rotor assembly 20 during rotation, which leads to worsened motor noise and affected motor stability.

[0077] Meanwhile, the first reinforcing rib 42 is provided to connect the reinforcing protrusion 41 and the wall of the closed end 142, thereby enhancing the structural strength of the reinforcing protrusion 41, reducing the possibility of deformation of the reinforcing protrusion 41, and further increasing 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 parts and assembly steps. Simultaneously, the integration of the reinforcing protrusion 41 and the stator insulator 14 is improved, and separation between them is less likely. It is understood that the axial F and radial dimensions of the reinforcing protrusion 41 need to meet the molding 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 The middle part of the closed end 142 is recessed in the direction away from the open opening 143 to form a cavity 1422. A reinforcing protrusion 41 is formed on the bottom wall of the cavity 1422. A first reinforcing rib 42 is connected between the reinforcing protrusion 41 and the wall of the cavity 1422.

[0080] In other words, only a portion of the closed end 142 is recessed away from the open opening 143 to form a cavity 1422. Compared to directly increasing the axial distance F between the entire closed end 142 and the open opening 143, only the middle part of the closed end 142 is recessed away from the open opening 143 to form a cavity 1422. In this way, the stator body 11 is smaller in volume and lighter in weight. Moreover, the closed end 142 has a cavity 1422, so 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 cavity 1422, so the reinforcing protrusion 41 is also not easy to deform and wobble. This can further increase the installation strength and stability of the cantilever shaft 15.

[0081] Specifically, the first reinforcing rib 42 is connected between the radial and circumferential walls of the reinforcing protrusion 41 and the cavity 1422, so that the connection area between the first reinforcing rib 42 and the closed end 142 is larger and the support effect on the reinforcing protrusion 41 is better.

[0082] For example, 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., without specific limitations.

[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, which is located in the receiving cavity 141 and connects the closed end 142 and the circumferential wall of the receiving cavity 141.

[0084] Specifically, the second reinforcing rib 43 connects the circumferential edge of the closed end 142 and the circumferential wall of the receiving cavity 141. By providing the second reinforcing rib 43 to strengthen the closed end 142, the possibility of deformation of the closed end 142 under the action of the cantilever shaft 15 is further reduced, thereby further increasing the installation strength and stability of the cantilever shaft 15. Compared to increasing the overall thickness of the portion of the closed end 142 without the recess 1422, by only providing multiple second reinforcing ribs 43 to strengthen the portion of the closed end 142 without the recess 1422, the stator body 11 is lighter, which is beneficial for the lightweight design of the air conditioner fan motor 100.

[0085] The wall of the closed end 142 with a cavity 1422 is the first wall, and the circumferential edge of the closed end 142 is the second wall. The second wall can connect the first wall and the circumferential wall of the receiving cavity 141. The circumferential wall of the receiving cavity 141 and the second wall play the role of supporting the first wall.

[0086] For example, 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., without specific limitations.

[0087] In some embodiments, the second reinforcing rib 43 or the first reinforcing rib 42 may also be directly connected between the wall of the recess 1422 and the wall of the receiving 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 the side wall of the closed end 142 facing the receiving cavity 141. The plurality of first reinforcing ribs 42 are arranged circumferentially spaced apart, and the plurality of second reinforcing ribs 43 are arranged circumferentially spaced apart. The second reinforcing ribs 43 and the first reinforcing ribs 42 are arranged in a radially corresponding manner.

[0089] In other words, the second reinforcing rib 43 is arranged on the force transmission path of the first reinforcing rib 42. When the first reinforcing rib 42 applies force to the closed end 142, the second reinforcing rib 43 can better transmit the force, making the closed end 142 less prone to deformation, so as to further increase the installation strength and stability of the cantilever shaft 15.

[0090] Specifically, multiple first reinforcing ribs 42 are evenly spaced apart along the circumference, and multiple second reinforcing ribs 43 are evenly spaced apart along the circumference.

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

[0092] For example, a recess 146 is defined between the circumferential outer wall surface of the portion of the closed end 142 in which the cavity 1422 is formed and the outer wall surface of the circumferential edge of the closed end 142.

[0093] By providing a recess 146 on the outer peripheral surface of the stator insulator 14 near the closed end 142, and simultaneously providing a third reinforcing rib 44 to strengthen the position where the recess 146 is provided, the volume and weight of the stator insulator 14 can be reduced, which is beneficial to the lightweight and miniaturized design of the air conditioner fan motor 100. On the other hand, the end of the stator insulator 14 near 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 recess 146 is positioned to avoid 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] For example, one can refer to Figure 3As shown, multiple recesses 146 can 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 of the multiple recesses 146 gradually decreases. On the one hand, this facilitates molding and demolding. On the other hand, the size and volume of the stator body 11 can also be smaller. At the same time, the structural strength of the end of the stator insulator 14 near the closed end 142 is also higher.

[0096] For example, the recess 146 may be arranged around the stator insulator 14, or the recess 146 may be only an arcuate recess 146, with a plurality of arcuate recesses 146 spaced apart along the circumference of the stator insulator 14.

[0097] For example, the third reinforcing rib 44 can be a strip-shaped reinforcing rib, or the third reinforcing rib 44 can be a triangular reinforcing rib, or the third reinforcing rib 44 can also be a trapezoidal reinforcing rib, etc., without specific limitations.

[0098] According to some embodiments of the present invention, reference can be made to Figure 3 and Figure 8 The recess 146 is provided with multiple parts, and the third reinforcing ribs 44 of adjacent recesses 146 are arranged in a radially corresponding manner.

[0099] In other words, the outermost third reinforcing rib 44 is located on the force transmission path of the innermost third reinforcing rib 44. When the innermost third reinforcing rib 44 is subjected to force, the outermost third reinforcing rib 44 can better transmit the force, making the closed end 142 less prone to deformation, thereby further increasing the installation strength and stability of the cantilever shaft 15.

[0100] According to some embodiments of the present invention, reference can be made to Figure 8 and Figure 9 The stator insulator 14 has a plurality of connecting ears 147 on its circumferential sidewall. Each connecting ear 147 has a second connecting part 148. The second connecting part 148 is used for the installation of the stator assembly 10, that is, the connecting ear 147 is used to install the air conditioner fan motor 100 on the external support component.

[0101] More specifically, the connecting ear 147 is located on the radial 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 ear 147 is radially positioned to correspond to the stator core 12 and the stator winding 17. In this way, the connecting ear 147 can better support the stator body 11, which helps to reduce the vibration of the stator body 11 during operation.

[0102] In some embodiments, a buffer 149 is provided at the second connecting portion 148. It should be noted that the second connecting portion 148 is used to connect to the external support member through the connector, and the buffer 149 is disposed between the connector and the second connecting portion 148 to reduce the possibility of direct contact between the connector and the second connecting portion 148. The buffer 149 plays a role in buffering and shock absorption, which helps to reduce the operating noise generated by the air conditioner fan motor 100 during operation.

[0103] For example, one can refer to Figure 8 and Figure 9 The second connecting part 148 is a connecting hole that passes through the axial direction F. The connecting hole opens 1481 on the radial side away from the stator insulator 14. A cylindrical buffer member 149 passes 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. The size of the opening 1481 is smaller than the outer diameter of the cylindrical buffer member 149, so that the cylindrical buffer member 149 is not easy to fall out of the opening 1481. Limiting bosses 1491 are formed at both ends of the cylindrical buffer member 149, and a groove 1471 is formed on the connecting lug 147. The groove 1471 is used to accommodate the limiting bosses 1491. The outer diameter of the limiting bosses 1491 is larger than the outer diameter of the middle part of the cylindrical buffer member 149, so that the limiting bosses 1491 can limit the cylindrical buffer member 149, making it difficult for the cylindrical buffer member 149 to come out of the connecting hole along the axial direction F. The 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 to one end of the cantilever shaft 15.

[0105] Compared to the connection between the cantilever shaft 15 and the stator insulator 14 using threaded connections or other methods, the stator insulator 14 is injection molded to one end of the cantilever shaft 15. This results in better connection stability between the stator insulator 14 and the cantilever shaft 15, making it less likely for the stator insulator 14 to come off, and also increasing the installation accuracy of the cantilever shaft 15. At the same time, the connection between the stator insulator 14 and the cantilever shaft 15 does not require additional assembly steps, which helps to improve the assembly efficiency of the air conditioner fan motor 100.

[0106] According to some embodiments of the present invention, reference can be made to Figure 5 and Figure 10 The circumferential sidewall of one end of the cantilever shaft 15 is provided with a groove 154, 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 sidewall of one end of the cantilever shaft 15, and the closed end 142 covers the protrusion.

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

[0109] For example, there may be only one groove 154, or there may be multiple grooves 154. For example, there may be only one protrusion, or there may be multiple protrusions.

[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 sidewall 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 detaching from the stator insulator 14 in the axial direction F 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 conditioner 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 (e.g., Figure 8 (as shown), stator winding 17, stator core 12 and insulating support 131.

[0112] In some embodiments, the connection between the stator core 12 and the stator winding 17 and the stator insulator 14 can be achieved during the injection molding process of the stator insulator 14. 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 axial movement of the stator winding 17 and the stator core 12 being 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 waterproofing and insulation.

[0113] For example, the stator insulator 14 can be made of BMC (bulk molding compound). Bulk molding compound has excellent flow characteristics, insulation and flame retardancy, and is easy to process. The stator insulator 14 made of BMC material also has better insulation and flame retardancy performance.

[0114] The stator assembly 10 of an air conditioner fan motor according to a specific embodiment of the present invention is described in detail below with reference to the accompanying drawings. It is to be understood that the following description is merely illustrative and should not be construed as limiting the invention.

[0115] like Figures 1 to 11As shown, the stator assembly 10 of an air conditioner fan motor according to a specific embodiment of the present invention 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, and 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 opening 143. The open opening 143 is used to mount the rotor assembly 20 into the receiving cavity 141. The closed end 142 is provided with a reinforcing structure. The cantilever shaft 15 is located in the receiving cavity 141 and is used for rotatable engagement with the rotor assembly 20. One end of the cantilever shaft 15 is fixedly connected to the closed end 142. One end of the cantilever shaft 15 is injection molded to the stator insulator 14. The end face 152 of one end of the cantilever shaft 15 is exposed on the outer wall surface 1421 of the closed end 142. The stator assembly 10 has a small axial dimension, fewer parts, and a small size, which is beneficial for the miniaturization design of the air conditioner fan 1000.

[0116] The reinforcing structure includes a reinforcing protrusion 41 and a first reinforcing rib 42 located 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. The first reinforcing rib 42 is connected between the reinforcing protrusion 41 and the wall of the closed end 142.

[0117] A cavity 1422 is formed by a recess in the middle of the closed end 142, moving away from the open opening 143. A reinforcing protrusion 41 is formed on the bottom wall of the cavity 1422, and a first reinforcing rib 42 connects the reinforcing protrusion 41 and the wall of the cavity 1422. The reinforcing structure includes a second reinforcing rib 43, which is located in the receiving cavity 141 and connects the closed end 142 and the circumferential wall of the receiving cavity 141. A plurality of first reinforcing ribs 42 and a plurality of second reinforcing ribs 43 are formed on the side wall of the closed end 142 facing the receiving cavity 141. The plurality of first reinforcing ribs 42 are arranged circumferentially spaced apart, and the plurality of second reinforcing ribs 43 are arranged circumferentially spaced apart. The second reinforcing ribs 43 and the first reinforcing ribs 42 are arranged in a radially corresponding manner.

[0118] The stator insulator 14 has two recesses 146 on its outer peripheral surface near the closed end 142. The recesses 146 extend circumferentially around the stator insulator 14. The reinforcing structure includes a third reinforcing rib 44 disposed in the recess 146, which connects the bottom wall and the side wall of the recess 146. The third reinforcing ribs 44 of the two recesses 146 are arranged radially in a one-to-one correspondence.

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

[0120] The stator insulator 14 has a plurality of connecting ears 147 on its circumferential sidewall. Each connecting ear 147 has a second connecting portion 148 for mounting the stator assembly 10. A buffer member 149 is provided at the second connecting portion 148. The circumferential sidewall of one end of the cantilever shaft 15 has 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] You can refer to Figures 1 to 3 The second aspect of the present invention also proposes an air conditioner fan motor 100.

[0122] According to a second aspect of the present invention, the air conditioner fan motor 100 includes the stator assembly 10 of the air conditioner fan motor described above. Since the stator assembly 10 of the air conditioner fan motor according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the stator assembly 10 of the air conditioner 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, eliminating multiple components at both ends of the stator body 11 used to form the bearing 24 chamber. Therefore, the number of components in the stator assembly 10 is less. The cantilever shaft 15 and the rotor assembly 20 are rotatably coupled. 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 shaft of the internal rotor structure air conditioner fan motor 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 the volume and structural complexity of the air conditioner fan motor 100 can be reduced, which is conducive to the miniaturization and lightweight design of the air conditioner fan motor 100.

[0123] According to some embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the air conditioner fan motor 100 also 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 serves to fix the rotor core 21 and the magnet 22. On the other hand, the rotor insulator 23 can reduce the possibility of the rotor core 21 and the magnet 22 coming into contact with 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 bearing 24 mates with rotor body 26, and the inner ring of bearing 24 passes through and mates with cantilever shaft 15, allowing rotor insulator 23 to rotate relative to cantilever shaft 15. One axial end of rotor insulator 23 has a first connecting portion 235, and a second connecting portion 235 is used to connect fan blade 30. In other words, cantilever shaft 15 mates with rotor insulator 23 via bearing 24, allowing rotor insulator 23 to rotate relative to cantilever shaft 15, while cantilever shaft 15 remains stationary. Rotor insulator 23 directly drives fan blade 30 to rotate, and fan blade 30 drives gas flow.

[0126] The cantilever shaft 15 is provided with a stop 151. Specifically, the stop 151 can be snapped into the cantilever shaft 15, or the stop 151 can be threaded into the cantilever shaft 15, etc., without specific limitations. The stop 151 is used to limit the axial F position of the bearing 24 to reduce the possibility of axial F movement of the bearing 24 relative to the cantilever shaft 15.

[0127] The distance between the stop 151 closest to the closed end 142 and the closed end 142 is greater than zero. This means that the minimum distance between the part of the closed end 142 opposite to the stop 151 in the axial direction F and the stop 151 is greater than zero. In other words, the stop 151 and the closed end 142 do not contact each other. This reduces the possibility that the pressure of the rotor insulator 23 on the bearing 24 can be transmitted to the closed end 142 through the stop 151, thereby reducing the possibility of deformation and damage to the stator body 11.

[0128] In some embodiments, the distance between the stop 151 closest to the closed end 142 and the reinforcing protrusion 41 is greater than zero, so as to reduce the possibility that the pressure of the rotor insulator 23 on the bearing 24 is transmitted to the reinforcing protrusion 41 through the stop 151, and reduce the possibility that the reinforcing protrusion 41 will be damaged or deformed.

[0129] For example, the distance between the stop 151 near the closed end 142 and the closed end 142 can be L, where L ≥ 0.5 mm. For example, L can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc., but is not limited to this. Where the process and the strength of the stop 151 allow, the distance between the stop 151 near the closed end 142 and the closed end 142 should be as small as possible to reduce the torque at the end where the cantilever shaft 15 is connected to the closed end 142.

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

[0131] According to some embodiments of the present invention, the air conditioner 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 with an open opening 143. The first annular flange 236 is arranged around the second annular flange 144 and is located radially outside the second annular flange 144. The outer peripheral surface of the second annular flange 144 extends inwardly along the axial direction F towards the stator assembly 10.

[0132] According to some embodiments of the present invention, reference can be made to Figure 2 and Figure 3 The air conditioner fan motor 100 also 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 with an open opening 143. The second annular flange 144 is arranged around the first annular flange 236 and is located radially inside the first annular flange 236. The outer peripheral surface of the first annular flange 236 extends inwardly along the axial direction F away from the stator body 11.

[0133] It should be noted that the annular flange on the outer ring can act as a water barrier. When water flows radially (or from top to bottom) toward the stator body 11, the annular flange on the outer ring will block the water and guide it axially, reducing the possibility of water directly entering the gap between the stator body 11 and the rotor insulator 23.

[0134] Water blocked by the outer annular flange will flow to the annular flange located in the inner ring. In the embodiment where the second annular flange 144 is located in the inner ring, the outer peripheral surface of the second annular flange 144 extends inwardly along the axial direction F towards the stator assembly 10, thereby guiding the water along the axial direction F towards the stator assembly 10, that is, guiding it away from the mating gap between the rotor insulator 23 and the stator body 11; Figure 2 As shown, in the embodiment where the first annular flange 236 is located on the inner ring, the outer circumferential surface of the first annular flange 236 extends inwardly along the axial direction F away from the stator body 11, thereby guiding water away from the stator body 11, that is, 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.

[0135] For example, the first annular flange 236 can be integrally formed with the rotor insulator 23, or the first annular flange 236 can be separately formed from the rotor insulator 23 and then connected to each other. For example, the rotor insulator 23 can be injection molded to form an integral part with the first annular flange 236.

[0136] For example, the second annular flange 144 can be integrally formed with the stator assembly 10, or the second annular flange 144 can be separately formed from the stator assembly 10 and then connected to each other. For example, the stator assembly 10 is injection molded to connect the second annular flange 144 as an integral unit.

[0137] In some embodiments, the air conditioner fan motor 100 may further include a third annular flange 145, which can be referred to as Figure 2 and Figure 3 In the embodiment where 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 with an open opening 143, and the first annular flange 236 surrounds the third annular flange 145. This helps to reduce the possibility of moisture and impurities entering the fitting gap between the rotor insulator 23 and the stator body 11. In the embodiment where 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 with an open opening 143, and the third annular flange 145 surrounds the first annular flange 236. This helps to reduce the possibility of impurities entering the fitting gap between the rotor insulator 23 and the stator body 11, and further increases the water resistance of the air conditioner fan motor 100.

[0138] like Figure 12 As shown, the air conditioner fan 1000 according to an embodiment of the present invention includes an air conditioner fan motor 100 according to an embodiment of the present invention. Since the air conditioner fan motor 100 according to the embodiments of the present invention has the above-mentioned beneficial technical effects, the stator assembly 10 of the air conditioner fan 1000 according to the embodiments 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, eliminating multiple components at both ends of the stator body 11 used to form the bearing 24 chamber. Therefore, the number of components in the stator assembly 10 is less. The cantilever shaft 15 and the rotor assembly 20 are rotatably coupled. 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 shaft of the internal rotor structure air conditioner fan motor 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 the volume and structural complexity of the air conditioner fan motor 100 can be reduced, which is conducive to the miniaturization and lightweight design of the air conditioner fan motor 100.

[0139] like Figure 13 As shown, 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 the embodiments of the present invention has the above-mentioned beneficial technical effects, the stator assembly 10 of the air conditioner 2000 according to the embodiments 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, eliminating multiple components at both ends of the stator body 11 used to form the bearing 24 chamber. Therefore, the number of components in the stator assembly 10 is less. The cantilever shaft 15 and the rotor assembly 20 are rotatably coupled. 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 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 the volume and structural complexity of the air conditioner fan motor 100 can be reduced, which is conducive to the miniaturization and lightweight design of the air conditioner fan motor 100.

[0140] Other configurations and operations of the air conditioner fan motor 100, air conditioner fan 1000, and air conditioner 2000 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0141] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0142] In the description of this specification, the references to terms such as "embodiment," "specific embodiment," and "example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0143] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator assembly for an air conditioner fan motor, characterized in that, include: The stator core, stator winding, and stator insulator are provided. 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, and the other axial end of the receiving cavity is an open opening. The open opening is used to install the rotor assembly in the receiving cavity. The closed end is provided with a reinforcing structure. A cantilever shaft is located in the receiving cavity and is rotatably engaged with the rotor assembly, one end of which is fixedly connected to the closed end.

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

3. The stator assembly of the air conditioner fan motor according to claim 1, characterized in that, The reinforcing structure includes a reinforcing protrusion and a first reinforcing rib at the closed end. One end of the cantilever shaft passes through the reinforcing protrusion and is fixedly connected to it. The first reinforcing rib connects the reinforcing protrusion and the wall of the closed end.

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

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

6. The stator assembly of the air conditioner fan motor according to claim 1, characterized in that, The closed end has a plurality of first reinforcing ribs and a plurality of second reinforcing ribs formed on the side wall facing the receiving cavity. The plurality of first reinforcing ribs are arranged circumferentially spaced apart, and the plurality of second reinforcing ribs are arranged circumferentially spaced apart. The second reinforcing ribs and the first reinforcing ribs are arranged in a radially corresponding manner.

7. The stator assembly of the air conditioner fan motor according to claim 1, characterized in that, The stator insulator has at least one recess on the outer peripheral surface of the end near the closed end, the recess extends circumferentially along the stator insulator, and the reinforcing structure includes a third reinforcing rib disposed in the recess, the third reinforcing rib connecting the bottom wall and the side wall of the recess.

8. The stator assembly of the air conditioner fan motor according to claim 7, characterized in that, The recess is provided with multiple portions, and the third reinforcing ribs of adjacent recesses are arranged in a radially corresponding manner.

9. The stator assembly of the air conditioner fan motor according to claim 1, characterized in that, The stator insulator has a plurality of connecting ears on its circumferential sidewalls. Each connecting ear has a second connecting part for mounting the stator assembly. A buffer is provided at the second connecting part.

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

11. The stator assembly of the air conditioner fan motor according to claim 10, characterized in that, The circumferential sidewall of one end of the cantilever shaft is provided with a groove and / or a protrusion, and the closed end covers the groove and / or the protrusion.

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

13. The air conditioner fan motor according to claim 12, characterized in that, It also 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 stop, the stop is used to limit the axial position of the bearing, wherein the distance between the stop closest 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, It also 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, and the second annular flange is connected to the end of the stator body with the open opening. 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 inwardly at an incline; or... The second annular flange is arranged around the first annular flange, and the outer peripheral surface of the first annular flange extends inwardly in a direction away from the stator body along the axial direction.

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

16. An air conditioner, characterized in that, Including the air conditioning fan as described in claim 15.

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