Motor housing and motor

Abstract

The utility model discloses a motor shell and a motor, and the motor shell comprises an outer wall, an inner wall and a plurality of air deflectors. Wherein the outer wall surrounds the periphery of the inner wall, an annular air duct is defined between the outer wall and the inner wall, the multiple air deflectors are arranged in the annular air duct at intervals around the periphery of the inner wall, and each air deflector is arranged in the axial direction of the annular air duct; the inner wall comprises a stator clamping part which defines a stator assembly installation space, and the stator clamping part is provided with a heat dissipation window which is communicated with the annular air channel and the stator assembly installation space. According to the motor housing of the utility model, the stator clamping part clamps the stator assembly, so that the fixation difficulty of the stator assembly and the motor housing can be reduced, and the installation stability of the stator assembly can be ensured at the same time; in addition, the stator assembly can effectively dissipate heat through the heat dissipation window, so that the thermal stability of the whole motor is improved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor housing and a motor. Background Art

[0002] Small motors are widely used in various handheld appliances in modern life, such as hair dryers. The design of these motors must not only meet basic requirements such as high efficiency and low noise, but also take into account heat dissipation performance and installation stability.

[0003] Existing small motor housings typically consist of an outer wall, an inner wall, and multiple air deflectors positioned between the outer and inner walls, with the stator assembly embedded within the inner wall. The stator assembly includes the stator core, a core component of the motor that generates significant heat during operation. Failure to effectively dissipate heat can lead to excessive motor temperatures, impacting operating efficiency and even causing damage.

[0004] To improve heat dissipation, existing products design the inner wall shorter than the stator core, leaving a portion of the stator core exposed. This allows the exposed stator core to dissipate heat through convection with the air surrounding the inner wall, improving the motor's thermal stability. However, shortening the inner wall length results in unstable stator assembly installation, increasing the difficulty of securing it. The stability of the stator assembly is crucial to motor operation; if it is not securely installed, it may cause the motor to malfunction due to vibration or impact.

[0005] The above content is only used to assist in understanding the technical solution of the utility model and does not constitute an admission that the above content is prior art. Utility Model Content

[0006] In view of the above problems, the present invention proposes a motor housing, which aims to solve the technical problem that the current motor housing cannot achieve both convenient and stable installation of the stator assembly and efficient heat dissipation.

[0007] To achieve the above-mentioned purpose, the motor housing proposed in the present invention comprises an outer wall, an inner wall and a plurality of air guide plates; wherein,

[0008] The outer wall surrounds the outer circumference of the inner wall and defines an annular air duct between the outer wall and the inner wall. A plurality of air guide plates are arranged in the annular air duct at intervals around the outer circumference of the inner wall, and each air guide plate is arranged along the axial direction of the annular air duct.

[0009] The inner wall includes a stator clamping portion that defines a stator assembly installation space, and a heat dissipation window that communicates with the annular air duct and the stator assembly installation space is formed on the stator clamping portion.

[0010] In one embodiment, a plurality of heat dissipation windows are provided, and the plurality of heat dissipation windows are arranged at intervals.

[0011] In one embodiment, the heat dissipation window extends to one end passing through the inner wall, so that the stator clamping portion between two adjacent heat dissipation windows forms a stator clamping arm for clamping the stator assembly.

[0012] In one embodiment, the inner wall further includes a lap portion for supporting the stator assembly; the lap portion is protruding from the inner circumferential surface of the inner wall.

[0013] In one embodiment, an overlapping portion is provided on the inner peripheral wall of each stator clamping arm.

[0014] In one embodiment, the air guide plate is connected to the outer peripheral surface of the stator clamping arm.

[0015] In one embodiment, the number of the stator clamping arms is greater than or equal to 3, so as to enclose and form the stator assembly installation space for clamping the stator assembly.

[0016] In one embodiment, the inner wall further includes a rotor fixing portion connected to the stator clamping portion in the axial direction, the rotor fixing portion defining a rotor installation space; and the wall thickness of the stator clamping portion is smaller than that of the rotor fixing portion.

[0017] In one embodiment, in the axial direction, a ratio of the length of the stator clamping portion to the length of the rotor fixing portion is greater than or equal to 0.7.

[0018] In one embodiment, the inner wall further includes a lap portion for supporting the stator core; the lap portion is provided at the connection between the rotor fixing portion and the stator clamping portion, and the inner circumference of the lap portion protrudes from the inner circumference of the stator clamping portion.

[0019] In one embodiment, the heat dissipation window extends along an axial straight line or an axial oblique line of the annular air duct.

[0020] In one embodiment, when the heat dissipation window extends along the axial oblique line of the annular air duct, the extension direction of the air guide plate is set at an angle to the axial direction, and the extension direction of the heat dissipation window is consistent with the extension direction of the air guide plate.

[0021] The present utility model also proposes a motor, comprising a stator assembly, a rotor assembly and a motor housing as described in any of the above embodiments, wherein the stator assembly is fixed in a stator assembly installation space of the motor housing, and the stator clamping portion of the motor housing clamps the outer peripheral wall of the stator assembly; the stator assembly comprises a skeleton and a stator core arranged on the outer periphery of the skeleton, and the heat dissipation window of the motor housing is arranged corresponding to the stator core.

[0022] In one embodiment, the heat dissipation window extends beyond the frame in a direction away from the stator assembly, so as to form an air intake gap between the heat dissipation window and the frame that communicates with the annular air duct and the interior of the stator assembly.

[0023] In one embodiment, the skeleton includes a plurality of winding parts spaced apart around the axial direction, and windings are wound on the winding parts; a heat dissipation channel is formed between two adjacent winding parts, and the heat dissipation channel is connected to the air intake gap.

[0024] In one embodiment, the lower end of the stator core is overlapped on the overlapping portion of the motor housing, the lower end of the skeleton is placed on the inner periphery of the overlapping portion, and the lower end surface of the skeleton is spaced apart from the lower end surface of the heat dissipation window to form the air intake gap.

[0025] The motor housing of this utility model has a heat dissipation window formed on the stator clamping portion of the inner wall, connecting the annular air duct and the stator assembly installation space. When the stator assembly is installed on the inner wall, heat can be effectively dissipated through the heat dissipation window, eliminating the need to shorten the inner wall to increase the heat dissipation area of ​​the stator assembly. This allows the inner wall to be longer to securely clamp the stator assembly, improving heat dissipation while also ensuring stable installation of the stator assembly. Furthermore, because the stator clamping portion directly clamps and secures the stator assembly to the outer periphery, it ensures stable installation of the stator assembly while improving the ease of assembly within the motor housing and reducing the difficulty of securing the stator assembly. Furthermore, the stator assembly can adopt a universal structure, eliminating the need for a specific design, thus avoiding the need for re-molding the stator assembly and reducing the overall manufacturing cost of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 Shows a schematic structural diagram of an embodiment of the motor housing of the utility model;

[0028] Figure 2 for Figure 1 A top view of the motor housing;

[0029] Figure 3 for Figure 1 A cross-sectional view of the motor housing at one angle;

[0030] Figure 4 This is a schematic structural diagram of an embodiment of a motor of the present utility model;

[0031] Figure 5 for Figure 4 Top view of the motor;

[0032] Figure 6 for Figure 5 A cross-sectional view along line VI-VI;

[0033] Figure 7 for Figure 5 A cross-sectional view along line VII-VII;

[0034] Figure 8 for Figure 4 A cross-sectional view of the motor from another angle;

[0035] Figure 9 for Figure 4 A cross-sectional view of the motor from another angle;

[0036] Figure 10 for Figure 4 Exploded diagram of the motor;

[0037] Figure 11 This is a structural schematic diagram of an embodiment of a stator assembly of the present utility model;

[0038] Figure 12 This is a structural diagram of an embodiment of the skeleton of the present utility model.

[0039] Description of Figure Numbers:

[0040]

[0041] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that meet both A and B.

[0045] The utility model provides a motor housing.

[0046] In the embodiment of this utility model, please refer to Figures 1 to 4 The motor housing 100 includes an outer wall 110, an inner wall 120 and a plurality of air guide plates 130; wherein the outer wall 110 surrounds the outer circumference of the inner wall 120 and defines an annular air duct 140 between the outer wall 110 and the inner wall 120, and the plurality of air guide plates 130 are arranged in the annular air duct 140 at intervals around the outer circumference of the inner wall 120, and each air guide plate 130 is arranged along the axial direction of the annular air duct 140; the inner wall 120 includes a stator clamping portion 121 that defines a stator assembly installation space 122, and a heat dissipation window 123 is opened on the stator clamping portion 121 to connect the annular air duct 140 and the stator assembly installation space 122.

[0047] In this embodiment, the motor housing 100 as a whole can be made of aluminum alloy, cast iron, stainless steel, copper, zinc and other materials, which can be selected according to actual use requirements and are not specifically limited here. Specifically, the outer wall 110 and the inner wall 120 are cylindrical, and a plurality of air guide plates 130 are connected between the inner wall 120 surface of the outer wall 110 and the outer wall 110 surface of the inner wall 120 to connect the inner wall 120 and the outer wall 110. In order to ensure structural strength, the outer wall 110, the inner wall 120 and the plurality of air guide plates 130 are integrally formed and connected. The air guide plates 130 are arranged along the axial direction of the annular air duct 140, and the extension direction of the air guide surface of the air guide plates 130 is arranged to intersect the axial and radial directions of the annular air duct 140, that is, the air guide plates 130 extend obliquely along the axial direction of the annular air duct 140 to guide and diffuse the airflow entering the annular air duct 140. The number of air guide plates 130 , the interval between two adjacent air guide plates 130 , and the distance between the inner wall 120 and the outer wall 110 can be designed according to the specifications of the motor and are not specifically limited here.

[0048] The inner wall 120 includes a stator clamping portion 121 to define a stator assembly installation space 122 for mounting the stator assembly 200. Therefore, the stator assembly 200 is clamped and fixed within the stator assembly installation space 122 by the stator clamping portion 121. Furthermore, since the heat dissipation window 123 is provided on the stator clamping portion 121, the heat dissipation area of ​​the stator assembly 200 is increased, eliminating the need to shorten the stator clamping portion 121. This ensures a stable installation of the stator assembly 200 while making installation of the stator assembly 200 more convenient and effectively reducing the difficulty of securing the stator assembly 200. It should be noted that the stator clamping portion 121 in the present application can be clamped on the outer periphery of the stator assembly 200, and the stator clamping portion 121 has a certain elastic restoring force. When the stator assembly 200 needs to be assembled, the stator clamping portion 121 can be opened to a certain extent. After the stator assembly 200 is assembled in place, the stator clamping portion 121 can be tightly clamped on the outer periphery of the stator assembly 200 through elastic force, thereby achieving a stable installation of the stator assembly 200.

[0049] In order to further improve the heat dissipation effect of the stator assembly 200, the length of the stator clamping portion 121 is optionally less than the length of the stator assembly 200. In this way, the stator assembly 200 is partially clamped in the stator assembly installation space 122 and partially exposed on the inner wall 120, so as to increase the heat dissipation area and improve the heat dissipation effect. The number of heat dissipation windows 123 can be one or more. In order to take into account the heat dissipation effect and installation stability of the stator assembly 200, the heat dissipation windows 123 are usually set to multiple. The stator clamping portion 121 can be designed as a cylindrical structure with multiple holes, a mesh structure, or a claw-shaped structure with multiple notches. Therefore, the shape of the heat dissipation window 123 can be many. For example, the heat dissipation window 123 can be set as a rectangular, circular, semicircular, corrugated, etc. The heat dissipation window 123 can be a closed hole opened on the stator clamping portion 121 or a notch. It can be selected and designed according to actual needs. The shape and size of the heat dissipation window 123 are not specifically limited here.

[0050] The motor housing of the present invention defines a heat dissipation window 123 on the stator clamping portion 121 of the inner wall 120, which connects the annular air duct 140 and the stator assembly mounting space 122. When the stator assembly 200 is mounted on the inner wall 120, heat can be effectively dissipated through the heat dissipation window 123. This eliminates the need to shorten the inner wall 120 to increase the heat dissipation area of ​​the stator assembly 200. Thus, the inner wall 120 can be made longer to securely clamp the stator assembly 200, improving heat dissipation while also ensuring the stability of the stator assembly 200. Furthermore, because the stator clamping portion 121 is directly clamped and fixed to the outer periphery of the stator assembly 200, the stator assembly 200 is easily assembled within the motor housing 100 while ensuring a secure mounting of the stator assembly 200. Furthermore, the stator assembly 200 can adopt a universal structure, eliminating the need for a specific design. This avoids the need for re-molding the stator assembly 200, thereby reducing the overall manufacturing cost of the motor.

[0051] Furthermore, a plurality of heat dissipation windows 123 are provided, and the plurality of heat dissipation windows 123 are arranged at intervals. The number of heat dissipation windows 123 can be many, such as three, five, seven, etc., which is not specifically limited here. By providing a plurality of heat dissipation windows 123, the heat dissipation area can be effectively increased, and the heat dissipation effect of the stator assembly 200 can be improved. Specifically, the plurality of heat dissipation windows 123 are arranged at intervals in the circumferential direction of the annular air duct 140. In this way, when the stator assembly 200 is installed in the stator assembly installation space 122, the circumferential side of the stator assembly 200 can be cooled through the heat dissipation windows 123, thereby avoiding heat concentration in some areas of the circumferential side of the stator assembly 200, so as to further improve the thermal stability of the motor.

[0052] In one embodiment, if Figures 1 to 4 As shown, the heat dissipation window 123 extends to one end that passes through the inner wall 120, so that the stator clamping portion 121 between two adjacent heat dissipation windows 123 forms a stator clamping arm 124 for clamping the stator assembly 200. In this way, the heat dissipation window 123 is a notch that passes through one end of the inner wall 120. When the heat dissipation window 123 is set as a notch, the stator clamping portion 121 between two adjacent heat dissipation windows 123 can be formed into a stator clamping arm 124, one end of which is formed as a free end. In this way, the stator clamping arm 124 has a certain elastic deformation force, which makes it easier to assemble and disassemble the stator assembly 200 in the stator clamping portion 121. The elastic clamping force of the multiple stator clamping arms 124 can more firmly clamp the stator assembly 200, thereby improving the stability of the connection between the stator assembly 200 and the motor housing 100.

[0053] In one embodiment, please refer to Figure 1 、 Figure 3 、 Figure 6 、 Figure 7 and Figure 9 The inner wall 120 also includes a lap joint 126 for supporting the stator assembly 200; the lap joint 126 is protruded from the inner circumference of the inner wall 120. The lap joint 126 can be connected to the stator clamping arm 124, or it can be connected to other structures of the inner wall 120 (such as the rotor fixing portion 127 described below). By making the inner circumference of the lap joint 126 protrude from the inner wall 120, that is, protruding from the inner circumference of the stator clamping arm 124, when the stator assembly 200 is installed in the stator assembly installation space 122, the lap joint 126 can support and axially limit the stator assembly 200, thereby improving the assembly reliability of the stator assembly 200 in the motor housing 100. In addition, in certain circumstances, the lap joint 126 can raise the height of the frame 210 of the stator assembly 200, allowing the airflow at the heat dissipation gap 123 to flow into the interior of the frame 210 of the stator assembly 200, further improving the heat dissipation effect.

[0054] Optionally, the overlapping portion 126 is connected to the inner circumferential surface of the stator clamping arm 124. This allows the overlapping portion 126 to avoid the heat dissipation gap 123, thereby preventing the overlapping portion 126 from affecting heat dissipation. Furthermore, each stator clamping arm 124 is provided with an overlapping portion 126 on the inner circumferential wall. This ensures that the stator core 220 is supported and limited by multiple overlapping portions 126 along the circumference, thereby improving the installation stability of the stator core 220 in the inner wall 120. The overlapping portion 126 also provides a certain degree of structural reinforcement for the stator clamping arm 124.

[0055] In one embodiment, if Figures 1 to 10 As shown, the air deflector 130 is connected to the outer circumferential surface of the stator clamping arm 124. In this way, the air deflector 130 is prevented from being located at the heat dissipation window 123 and affecting heat dissipation. In addition, connecting the air deflector 130 to the outer circumferential surface of the stator clamping arm 124 can improve the connection strength between the air deflector 130 and the inner wall 120. At the same time, the air deflector 130 can also provide support for the stator clamping arm 124, increase the structural strength of the stator clamping arm 124, and improve the clamping effect of the stator clamping arm 124 on the stator assembly 200. Furthermore, multiple air deflectors 130 are connected to the outer circumferential surfaces of multiple stator clamping arms 124 in a one-to-one correspondence. In this way, each stator clamping arm 124 can be strengthened and supported by the air deflector 130.

[0056] In one embodiment, the number of stator clamping arms 124 is greater than or equal to three, enclosing a stator assembly installation space 122 for clamping the stator assembly 200. Providing at least three stator clamping arms 124 to clamp the stator assembly 200 not only increases the clamping area of ​​the stator clamping portion 121 on the stator assembly 200, thereby improving the clamping effect of the stator clamping portion 121 on the stator assembly 200, but also increases the number of heat dissipation windows 123, thereby improving the heat dissipation effect of the entire motor.

[0057] In one embodiment, please refer to Figures 1 to 3 、 Figures 6 to 9 The inner wall 120 further includes a rotor fixing portion 127 axially connected to the stator clamping portion 121 , and the rotor fixing portion 127 defines a rotor installation space 128 ; the wall thickness of the stator clamping portion 121 is smaller than the wall thickness of the rotor fixing portion 127 .

[0058] In this embodiment, the rotor fixing portion 127 and the stator clamping portion 121 are sequentially connected in the axial direction of the annular air duct 140. The rotor installation space 128 of the rotor fixing portion 127 is used to install and fix the rotor assembly 300. If the thickness of the stator clamping arm 124 is less than that of the rotor fixing portion 127, the stator clamping arm 124 is more easily elastically deformed, thereby facilitating the assembly of the stator assembly 200. Moreover, the thinner stator clamping portion 121 can more quickly transfer heat from the stator assembly 200 to the annular air duct 140, thereby improving the heat dissipation effect of the entire stator assembly 200. In addition, since the radial dimension of the stator assembly 200 is generally larger than the radial dimension of the rotor assembly 300, by making the thickness of the stator clamping arm 124 less than that of the rotor fixing portion 127, the stator assembly installation space 122 enclosed by multiple stator clamping arms 124 is larger, which can accommodate stator assemblies 200 of larger sizes.

[0059] Furthermore, in the axial direction, the ratio of the length of the stator clamping portion 121 to the length of the rotor fixing portion 127 is greater than or equal to 0.7.

[0060] In this embodiment, the stator clamping portion 121 is used to clamp the entire stator assembly 200, and the rotor fixing portion 127 is used to fix the rotor assembly 300. Generally, the stator clamping portion 121 and the rotor fixing portion 127 are adjacent to each other. The length of the stator clamping portion 121 refers to the distance from the connection between the stator clamping portion 121 and the rotor assembly 300 to the top of the stator clamping portion 121. In embodiments where the inner wall of the stator clamping portion 121 is provided with a protruding overlap portion 126, the length refers to the distance from the bottom of the overlap portion 126 to the top of the stator clamping portion 121.

[0061] By making the ratio of the length of the stator clamping portion 121 to the length of the rotor fixing portion 127 greater than or equal to 0.7, the length of the stator clamping portion 121 is close to or greater than the length of the rotor fixing portion 127. Due to the provision of the heat dissipation window 123, the stator clamping portion 121 can have sufficient length to clamp the stator assembly 200, thereby improving the clamping stability of the stator clamping portion 121 on the stator assembly 200 and effectively preventing the motor from malfunctioning due to vibration or impact.

[0062] Furthermore, in the axial direction, the length of the stator clamping portion 121 is greater than or equal to the length of the rotor fixing portion 127 .

[0063] In one embodiment, the inner wall 120 further includes a lap portion 126 for supporting the stator core 220 ; the lap portion 126 is provided at the connection between the rotor fixing portion 127 and the stator clamping portion 121 , and the inner circumference of the lap portion 126 protrudes from the inner circumference of the stator clamping portion 121 .

[0064] In this embodiment, the overlapping portion 126 is provided at the connection between the rotor fixing portion 127 and the clamping arm, thereby enhancing the connection strength between the stator clamping portion 121 and the rotor fixing portion 127. This is particularly true when the stator clamping portion 121 includes multiple stator clamping arms 124, effectively strengthening the connection strength between the stator clamping arms 124 and the rotor fixing portion 127. Furthermore, by having the inner circumference of the overlapping portion 126 protrude beyond the inner circumference of the stator clamping portion 121, the overlapping portion 126 can support and axially limit the stator core 220 when the stator assembly 200 is installed in the stator assembly installation space 122, thereby improving the assembly reliability of the stator assembly 200 within the motor housing 100. Furthermore, in certain circumstances, the overlapping portion 126 can raise the height of the stator assembly 200's frame 210, allowing airflow from the heat dissipation gap 123 to flow into the interior of the stator assembly 200's frame 210, further enhancing heat dissipation.

[0065] In one embodiment, if Figure 1 、 Figure 3 and Figure 4 As shown, the heat dissipation window 123 extends along the axial direction of the annular air duct 140. In this way, the processing difficulty of the heat dissipation window 123 can be reduced, and the structural strength of the stator clamping portion 121 can be ensured, so that the stator clamping portion 121 clamps the stator assembly 200 more firmly and reliably.

[0066] In another embodiment, the heat dissipation window 123 extends obliquely along the axial direction of the annular air duct 140. With the stator clamping portion 121 at the same height, extending the heat dissipation window 123 obliquely along the axial direction of the annular air duct 140 can increase the length of the heat dissipation window 123, thereby increasing the area of ​​the heat dissipation window 123 and further improving the heat dissipation effect of the motor.

[0067] Furthermore, the extension direction of the air deflector 130 is arranged at an angle to the axial direction, and the extension direction of the heat dissipation window 123 is aligned with the extension direction of the air deflector 130. This aligns the extension direction of the heat dissipation window 123 with the airflow direction within the annular air duct 140, further improving the heat dissipation effect. Furthermore, the extension direction of the stator clamping arm 124 can also be aligned with the extension direction of the air deflector 130, further ensuring the connection strength between the air deflector 130 and the stator clamping portion 121.

[0068] The utility model also proposes a motor, please refer to Figures 4 to 10The motor includes a stator assembly 200, a rotor assembly 300, and a motor housing 100. The specific structure of the motor housing 100 is similar to that of the above-mentioned embodiments. The stator assembly 200 is fixed within the stator assembly installation space 122 of the motor housing 100, and the stator clamping portion 121 of the motor housing 100 clamps the outer peripheral wall of the stator assembly 200. The stator assembly 200 includes a frame 210 and a stator core 220 disposed on the outer periphery of the frame 210. The heat dissipation window 123 of the motor housing 100 is provided corresponding to the stator core 220. Since the present motor adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be detailed here.

[0069] The shape, structure and connection method of the skeleton 210 and the stator core 220 of the stator assembly 200 can refer to existing designs and are not specifically limited here. Generally, the skeleton 210 is annular as a whole, and the stator core 220 is arranged on the periphery of the skeleton 210 in an arc or long block shape. The stator assembly 200 is embedded in the stator assembly installation space 122 of the motor housing 100, and the periphery of the stator core 220 is clamped and fixed by the stator clamping portion 121. While ensuring the stable installation of the stator assembly 200, it can improve the assembly convenience of the stator assembly 200 in the motor housing 100 and reduce the difficulty of fixing the stator assembly 200; and the stator assembly 200 can adopt a universal structure without the need to design a specific structure, thereby avoiding the need to re-open the mold of the stator assembly 200, thereby reducing the manufacturing cost of the entire motor. The heat dissipation window 123 of the motor housing 100 is arranged corresponding to the stator core 220, which can increase the exposed area of ​​the stator core 220 in the annular air duct 140 while stably installing the stator assembly 200, thereby improving the overall heat dissipation effect of the motor.

[0070] In one embodiment, if Figures 6 to 9 As shown, the heat dissipation window 123 extends beyond the skeleton 210 in a direction away from the stator assembly 200, so as to form an air intake gap 125 between the skeleton 210 and the stator assembly 200, which connects the annular air duct 140 and the interior of the stator assembly 200. In other words, the heat dissipation window 123 is not completely blocked by the skeleton 210 and the stator core 220, and the skeleton 210 is located above the bottom wall of the heat dissipation window 123. In this way, an air intake gap 125 connecting the annular air duct 140 and the interior of the stator assembly 200 can be formed between the bottom wall of the skeleton 210 and the bottom wall of the heat dissipation window 123. Then, the airflow in the annular air duct 140 can enter the interior of the stator assembly 200 through the air intake gap 125, thereby achieving heat dissipation and cooling of the internal structure of the stator assembly 200, improving the heat dissipation effect of the entire motor, and further ensuring the thermal stability of the motor. The height of the air intake gap 125 can be selected and designed according to actual needs and is not specifically limited here.

[0071] Further, please refer to Figures 4 to 12The skeleton 210 includes a plurality of winding sections 211 spaced axially apart, with windings 230 wound around each section. Adjacent winding sections 211 enclose a heat dissipation channel 212, which communicates with the air intake gap 125. This allows airflow within the annular air duct 140 to flow through the air intake gap 125 into the heat dissipation channel 212 of the skeleton 210, achieving air circulation within the stator assembly 200 and effectively dissipating heat and cooling the plurality of windings 230.

[0072] In one embodiment, please refer to Figure 1 、 Figure 3 、 Figure 6 、 Figure 7 and Figure 9 The inner wall 120 also includes a lap joint 126 for supporting the stator core 220; the inner circumference of the lap joint 126 protrudes from the inner circumference of the stator clamping arm 124; the lower end of the stator core 220 is lapped on the lap joint 126 of the motor housing 100, and the lower end of the skeleton 210 is placed on the inner circumference of the lap joint 126, and the lower end surface of the skeleton 210 is spaced apart from the lower end surface of the heat dissipation window 123 to form an air intake gap 125.

[0073] In this embodiment, by making the inner circumferential surface of the overlap portion 126 protrude from the inner circumferential surface of the stator clamping arm 124, the overlap portion 126 can support and axially limit the stator core 220 when the stator assembly 200 is installed in the stator assembly installation space 122, thereby improving the assembly reliability of the stator assembly 200 in the motor housing 100. In addition, by limiting and supporting the entire stator assembly 200 through the overlap portion 126, rather than limiting and supporting the stator assembly 200 through the lower end surface of the frame 210, the height of the stator assembly 200 frame 210 can be raised, allowing the lower end surface of the frame 210 to be separated from the lower end surface of the heat dissipation window 123 to form an air intake gap 125.

[0074] In one embodiment, please refer to Figure 1 、 Figure 3 、 Figure 6 、 Figure 7 and Figure 9 The inner wall 120 also includes a lap portion 126 for supporting the stator core 220; the inner circumferential surface of the lap portion 126 protrudes from the inner circumferential surface of the stator clamping arm 124; each stator clamping arm 124 is provided with a lap portion 126 on the inner circumferential wall; the lower end of the stator core 220 is lapped on the lap portion 126 of the motor housing 100, and the lower end of the skeleton 210 is placed on the inner circumference of the lap portion 126, and the lower end surface of the skeleton 210 is spaced apart from the lower end surface of the heat dissipation window 123 to form an air intake gap 125.

[0075] In this embodiment, by ensuring that the inner circumferential surface of the overlap portion 126 protrudes beyond the inner circumferential surface of the stator clamping arm 124, the overlap portion 126 can support and axially limit the stator core 220 when the stator assembly 200 is installed in the stator assembly installation space 122, thereby improving the assembly reliability of the stator assembly 200 within the motor housing 100. Each stator clamping arm 124 is provided with an overlap portion 126 on its inner circumferential wall. This allows the overlap portion 126 to avoid the heat dissipation gap 123, thereby preventing the overlap portion 126 from affecting heat dissipation, while ensuring the formation of the air intake gap 125. Furthermore, the presence of multiple overlap portions 126 around the circumference of the stator core 220 for support and positioning improves the installation stability of the stator core 220 within the inner wall 120. Furthermore, the overlap portion 126 can also provide structural reinforcement for the stator clamping arm 124 to a certain extent.

[0076] In one embodiment, please refer to Figures 1 to 3 、 Figures 6 to 10 The inner wall 120 also includes a rotor fixing portion 127 axially connected to the stator clamping portion 121, and the rotor fixing portion 127 defines a rotor installation space 128; the wall thickness of the stator clamping portion 121 is less than the wall thickness of the rotor fixing portion 127; the motor also includes a rotor assembly 300, the rotor assembly 300 includes a rotating shaft 310, a magnet 320, a bearing assembly 330, an impeller 340 and a sleeve 350, the rotating shaft 310 is sequentially penetrated by the magnet 320, the bearing assembly 330 and the impeller 340; the magnet 320 is arranged in the skeleton 210; the sleeve 350 and the bearing assembly 330 are arranged in the rotor installation space 128; the sleeve 350 is sleeved on the outside of the bearing assembly 330 and is fixedly connected to the rotor fixing portion 127 of the motor housing 100; the impeller 340 is fixedly connected to the end of the rotating shaft 310 away from the stator assembly 200, so as to drive the airflow into the annular air duct 140.

[0077] In this embodiment, the rotor fixing portion 127 and the stator clamping portion 121 are sequentially connected in the axial direction of the annular air duct 140. The rotor mounting space 128 of the rotor fixing portion 127 is used to install and secure the rotor assembly 300. The thickness of the stator clamping arm 124 is smaller than that of the rotor fixing portion 127, making it easier for the stator clamping arm 124 to elastically deform, thereby facilitating the assembly of the stator assembly 200. Furthermore, the thinner stator clamping portion 121 can more quickly transfer heat from the stator assembly 200 to the annular air duct 140, thereby improving the heat dissipation of the entire stator assembly 200.

[0078] The specific structure and connection method of the rotating shaft 310, magnet 320, bearing assembly 330, and impeller 340 can refer to existing designs and are not specifically limited here. The impeller 340 drives a sufficient amount of airflow into the annular air duct 140. By providing a sleeve 350 that fits around the outer periphery of the bearing assembly 330, the bearing assembly 330 is integrated into a single structure, preventing the upper and lower bearings and springs of the bearing assembly 330 from becoming separated, thereby further facilitating the assembly and fixation of the entire rotor assembly 300 within the inner wall 120.

[0079] In one embodiment, please refer to Figures 1 to 3 、 Figures 6 to 10 The inner wall 120 further includes a rotor fixing portion 127 connected to the stator clamping portion 121 in the axial direction, and the rotor fixing portion 127 defines a rotor installation space 128; the wall thickness of the stator clamping portion 121 is less than the wall thickness of the rotor fixing portion 127; in the axial direction, the ratio of the length of the stator clamping portion 121 to the length of the rotor fixing portion 127 is greater than or equal to 0.8; the motor further includes a rotor assembly 300, which includes a rotating shaft 310, a magnet 320, a bearing assembly 330, and an impeller 340 and sleeve 350, the shaft 310 is sequentially penetrated by the magnet 320, the bearing assembly 330 and the impeller 340; the magnet 320 is arranged in the frame 210; the sleeve 350 and the bearing assembly 330 are arranged in the rotor installation space 128; the sleeve 350 is sleeved on the outside of the bearing assembly 330 and is fixedly connected to the rotor fixing part 127 of the motor housing 100; the impeller 340 is fixedly connected to the end of the shaft 310 away from the stator assembly 200, so as to drive the airflow into the annular air duct 140.

[0080] In this embodiment, the rotor fixing portion 127 and the stator clamping portion 121 are sequentially connected in the axial direction of the annular air duct 140. The rotor mounting space 128 of the rotor fixing portion 127 is used to install and secure the rotor assembly 300. The thickness of the stator clamping arm 124 is smaller than that of the rotor fixing portion 127, making it easier for the stator clamping arm 124 to elastically deform, thereby facilitating the assembly of the stator assembly 200. Furthermore, the thinner stator clamping portion 121 can more quickly transfer heat from the stator assembly 200 to the annular air duct 140, thereby improving the heat dissipation of the entire stator assembly 200. In the axial direction, the ratio of the length of the stator clamping portion 121 to the length of the rotor fixing portion 127 is greater than or equal to 0.8. In this way, the length of the stator clamping portion 121 can be close to or greater than the length of the rotor fixing portion 127. Since the heat dissipation window 123 is provided, the stator clamping portion 121 can have a sufficient length to clamp the stator assembly 200, thereby improving the clamping stability of the stator clamping portion 121 on the stator assembly 200 and effectively preventing the motor from malfunctioning due to vibration or impact.

[0081] The specific structure and connection method of the rotating shaft 310, magnet 320, bearing assembly 330 and impeller 340 can refer to existing designs and are not specifically limited here. A sufficient amount of airflow can be driven into the annular air duct 140 by the impeller 340. By setting a sleeve 350 to be sleeved on the outer periphery of the bearing assembly 330, the bearing assembly 330 can be integrated into an integrated structure, preventing the upper and lower bearings and springs of the bearing assembly 330 from being separated, thereby making it easier to assemble and fix the entire rotor assembly 300 in the inner wall 120. And because the bearing assembly 330 is installed in the sleeve 350, the length of the rotor fixing part 127 can be shortened, so that the overall axial length of the impeller 340 and the rotor fixing part 127 can be set shorter, thereby shortening the length of the entire motor, which is conducive to achieving miniaturization of the motor.

[0082] Furthermore, if Figure 6 、 Figure 7 、 Figure 9 and Figure 10 As shown, the impeller 340 includes a hub 341 and a plurality of blades 345 arranged on the periphery of the hub 341. The hub 341 includes a connecting portion 342 and a surrounding wall 343 surrounding and connected to the periphery of the connecting portion 342. The connecting portion 342 is fixedly connected to the rotating shaft 310. The surrounding wall 343 encloses a receiving groove 344. The plurality of blades 345 are connected to the outer periphery of the surrounding wall 343. The end of the sleeve 350 away from the stator assembly 200 extends out of the rotor fixing portion 127 and is accommodated in the receiving groove 344. The surrounding wall 343 and the rotor fixing portion 127 are arranged in the axial direction.

[0083] In this embodiment, the number of blades 345 can be selected and designed based on actual needs and is not limited here. Since the bearing assembly 330 is installed in the sleeve 350, the bearing assembly 330 has sufficient installation length, which can shorten the length of the rotor fixing portion 127, allowing the end of the sleeve 350 away from the stator assembly 200 to extend out of the rotor fixing portion 127. At the same time, since the portion of the sleeve 350 extending out of the rotor fixing portion 127 is accommodated in the receiving groove 344 enclosed by the surrounding wall 343, the overall axial length of the impeller 340, the rotor fixing portion 127, and the sleeve 350 can be set to be shorter, thereby shortening the length of the entire motor and facilitating the miniaturization of the motor.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A motor housing, characterized in that: It includes an outer wall, an inner wall and a plurality of wind guide plates; wherein, The outer wall surrounds the outer circumference of the inner wall and defines an annular air duct between the outer wall and the inner wall. A plurality of air guide plates are arranged in the annular air duct at intervals around the outer circumference of the inner wall, and each air guide plate is arranged along the axial direction of the annular air duct. The inner wall includes a stator clamping portion that defines a stator assembly installation space, and a heat dissipation window that communicates with the annular air duct and the stator assembly installation space is formed on the stator clamping portion.

2. The motor housing according to claim 1, wherein There are multiple heat dissipation windows, and the multiple heat dissipation windows are arranged at intervals.

3. The motor housing according to claim 2, wherein: The heat dissipation window extends to one end passing through the inner wall, so that the stator clamping portion between two adjacent heat dissipation windows forms a stator clamping arm for clamping the stator assembly.

4. The motor housing according to claim 3, wherein: The inner wall further includes a lap portion for supporting the stator assembly; the lap portion is protruding from the inner circumferential surface of the inner wall.

5. The motor housing according to claim 4, wherein: The inner peripheral wall of each stator clamping arm is provided with a lap portion.

6. The motor housing according to any one of claims 3 to 5, characterized in that: The air guide plate is connected to the outer peripheral surface of the stator clamping arm.

7. The motor housing according to any one of claims 3 to 5, characterized in that The number of the stator clamping arms is greater than or equal to 3, so as to enclose and form the stator assembly installation space for clamping the stator assembly.

8. The motor housing according to any one of claims 1 to 3, characterized in that The inner wall further includes a rotor fixing portion connected to the stator clamping portion in the axial direction, and the rotor fixing portion defines a rotor installation space; the wall thickness of the stator clamping portion is smaller than the wall thickness of the rotor fixing portion.

9. The motor housing according to claim 8, wherein: In the axial direction, a ratio of the length of the stator clamping portion to the length of the rotor fixing portion is greater than or equal to 0.

7.

10. The motor housing according to claim 8, wherein The inner wall also includes a lap portion for supporting the stator core; the lap portion is provided at the connection between the rotor fixing portion and the stator clamping portion, and the inner circumference of the lap portion protrudes from the inner circumference of the stator clamping portion.

11. The motor housing according to any one of claims 1 to 5, characterized in that The heat dissipation window extends along an axial straight line or an axial oblique line of the annular air duct.

12. The motor housing according to claim 11, wherein: When the heat dissipation window extends along the axial oblique line of the annular air duct, the extension direction of the air guide plate is set at an angle to the axial direction, and the extension direction of the heat dissipation window is consistent with the extension direction of the air guide plate.

13. A motor, characterized in that: The invention comprises a stator assembly, a rotor assembly and a motor housing according to any one of claims 1 to 12, wherein the stator assembly is fixed in a stator assembly installation space of the motor housing, and the stator clamping portion of the motor housing clamps the outer peripheral wall of the stator assembly; the stator assembly comprises a skeleton and a stator core arranged on the outer periphery of the skeleton, and the heat dissipation window of the motor housing is arranged corresponding to the stator core.

14. The motor according to claim 13, wherein The heat dissipation window extends in a direction away from the stator assembly to exceed the frame, so as to form an annular air duct communicating with the motor housing and an air intake gap inside the stator assembly between the heat dissipation window and the frame.

15. The motor according to claim 14, wherein The skeleton includes a plurality of winding parts arranged at intervals in the axial direction of the motor housing, and windings are wound on the winding parts; a heat dissipation channel is formed between two adjacent winding parts, and the heat dissipation channel is communicated with the air intake gap.

16. The motor according to claim 14 or 15, characterized in that The motor housing is a motor housing as described in claim 4, 5 or 10, the lower end of the stator core is overlapped on the overlapping part of the motor housing, the lower end of the skeleton is placed on the inner periphery of the overlapping part, and the lower end surface of the skeleton is spaced apart from the lower end surface of the heat dissipation window to form the air intake gap.

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