A blower motor

Abstract

The utility model provides a kind of air blower motor, comprising: a heat sink, the central annular region of the first side of heat sink is equipped with a mounting shaft, the rim of heat sink is equipped with a shock-absorbing sealing shoulder around central annular region, shock-absorbing sealing shoulder includes a annular shoulder and the butt joint area of the partial outer perimeter of annular shoulder outward extension, butt joint area includes first screw hole and the shock-absorbing protrusion around first screw hole;A shell, with the first side of heat sink butt joint;A motor, sleeve joint in mounting shaft;A motor upper cover, cover motor;A motor rear cover, butt joint heat sink second side, after motor rear cover, heat sink and shell are laminated and are screwed, the end surface of annular side wall and annular shoulder interference fit form annular sealing crimping trajectory, the shock-absorbing protrusion of heat sink elastically supports shell.The utility model can effectively buffer vibration transmission by an integrated component, can also play the role of sealing waterproof, reduce assembly difficulty, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment, and more specifically, to a blower motor. Background Technology

[0002] The vehicle's air conditioning system is used to cool, heat, ventilate, and purify the air inside the car, thus providing a comfortable environment for passengers. The blower is a crucial component of the vehicle's air conditioning system, used to drive the flow of air. The noise level of the blower during operation directly affects passenger comfort.

[0003] In existing technology, a blower includes a casing, a stator, a rotor, and an impeller. The stator and rotor are at least partially installed inside the casing. The impeller is connected to the rotor via a shaft. When the rotor rotates, it drives the impeller to rotate, thereby driving the gas. During operation, the stator windings are energized to generate a magnetic field, which drives the rotor, which includes magnets, to rotate. The energization of the windings generates a large amount of heat; therefore, a heat sink is usually installed inside the casing to dissipate heat from the windings. In existing technology, the heat sink is located inside the casing and is detachably connected to it. Vibrations generated during blower operation cause the heat sink to move relative to the casing and impact the casing, resulting in significant noise.

[0004] The design of traditional vibration damping structures is crucial to the vibration and noise levels of blowers, but the reconciliation of vibration and noise is difficult, a major headache for blower manufacturers. Currently, the three main vibration damping structure designs on the market are as follows:

[0005] 1. An embedded design is adopted, in which the rubber pad is embedded between the stator and the bracket;

[0006] 2. It adopts a boss-type design, and the seal is achieved through contact with the boss.

[0007] 3. The split shock absorption structure is designed and connected by three rubber pads fixed to three fixed points on the bracket.

[0008] However, each of the above three structures has its drawbacks:

[0009] 1. The disadvantages of the embedded shock absorption structure design are: difficult assembly, inability to guarantee the coaxiality of the rotor, poor noise performance, and lack of waterproofing.

[0010] 2. The disadvantages of the boss damping structure design are: vibration, noise and waterproofing rely entirely on a single surface, which is difficult to make compatible and easily leads to vibration, noise and waterproofing problems. Various problems often occur in actual applications.

[0011] 3. The disadvantages of the split shock absorption structure design are: it is connected by three shock absorption pads, lacks waterproofing, and the assembly can only be assembled manually.

[0012] Therefore, this utility model provides a blower motor. Utility Model Content

[0013] To address the problems in the existing technology, the purpose of this utility model is to provide a blower motor that overcomes the difficulties of the existing technology. It can effectively buffer vibration transmission through an integrated component, thereby reducing vibration and noise while also providing a sealing and waterproof function, reducing assembly difficulty, and improving production efficiency.

[0014] An embodiment of this utility model provides a blower motor, comprising:

[0015] A heat sink is provided with a mounting shaft in the central annular region on the first side of the heat sink, and a shock-absorbing sealing shoulder is provided around the central annular region on the edge of the heat sink. The shock-absorbing sealing shoulder includes at least an annular shoulder and a docking area extending outward from a partial outer periphery of the annular shoulder. The docking area includes a first screw hole and a shock-absorbing protrusion around the first screw hole.

[0016] A housing that abuts against a first side of the heat sink, the housing including a mounting hole through which the mounting shaft passes and an circumferential sidewall surrounding the mounting hole;

[0017] A motor is fitted onto the mounting shaft;

[0018] A motor cover, which covers the motor;

[0019] A motor rear cover is connected to the second side of the heat sink. After the motor rear cover, heat sink, and outer shell are stacked and screwed together, the end face of the circumferential side wall is interference-fitted with the annular shoulder to form an annular sealing and pressing track. The shock-absorbing protrusion of the heat sink elastically supports the outer shell.

[0020] Preferably, the damping protrusion includes an annular damping shoulder surrounding the first screw hole, and the damping protrusion also includes a plurality of semi-cylindrical damping protrusions distributed along the trajectory of the annular damping shoulder, the central axis of the semi-cylindrical damping protrusions pointing to the central axis of the first screw hole.

[0021] Preferably, the shock-absorbing sealing shoulder and the shock-absorbing protrusion are both integrally injection molded rubber layers wrapped around the outer edge of the heat sink.

[0022] Preferably, the mating area is exposed outside the annular sealing compression track.

[0023] Preferably, the diameter of the annular sealing compression track is larger than the diameter of the central annular region.

[0024] Preferably, the housing further includes a plurality of second screw holes and a circumferential sidewall disposed around the periphery of the circumferential sidewall, the circumferential sidewall being fitted around the circumferential sidewall and the second screw holes;

[0025] The motor rear cover is provided with several third screw holes in its circumference, which are screwed together with the third screw holes of the motor rear cover, the first screw hole of the heat sink plate, and the second screw hole of the outer shell.

[0026] Preferably, the circumferential sidewall of the housing mates with the rear cover of the motor to form a sealed space for accommodating the motor and the heat sink.

[0027] Preferably, the housing is provided with an alignment recess surrounding the mounting hole, and the heat sink is embedded in the alignment recess.

[0028] Preferably, the alignment recess is a rounded rectangle, and the central annular area of ​​the heat sink, the shock-absorbing sealing shoulder, and the docking area are integrally formed to form a rounded rectangle pattern that coincides with the alignment recess.

[0029] Preferably, the motor cover has an output hole, and the motor shaft extends out of the motor cover from the output hole.

[0030] The blower motor of this invention can effectively buffer vibration transmission through an integrated component, which can reduce vibration and noise while also sealing and waterproofing, reducing assembly difficulty and improving production efficiency. Attached Figure Description

[0031] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0032] Figure 1 This is a cross-sectional view of the blower motor of this utility model.

[0033] Figure 2 This is a cross-sectional view of the assembly state of the outer casing and heat sink plate in the blower motor of this utility model.

[0034] Figure 3 This is a bottom view of the assembly state of the outer casing and heat sink plate in the blower motor of this utility model.

[0035] Figure 4 This is a schematic diagram of the outer casing of the blower motor of this utility model.

[0036] Figure 5 This is a top view of the heat sink in the blower motor of this utility model.

[0037] Figure 6 This is a perspective view of the heat sink in the blower motor of this utility model.

[0038] Figure 7 This is a perspective view of the rear cover of the blower motor of this utility model.

[0039] Figure Labels

[0040] 1. Shaft

[0041] 2. Motor cover

[0042] 3 motors

[0043] 4. Outer shell

[0044] 41 First circumference towards the sidewall

[0045] 42 Second week towards the side wall

[0046] 43 mounting holes

[0047] 44 Second screw hole

[0048] 45 Alignment recess

[0049] 5. Heat sink

[0050] 50 Sealed docking trajectory

[0051] 51 convex platform

[0052] 52 First screw hole

[0053] 53 Shock Absorber Bump

[0054] 531 Circular shock-absorbing shoulder platform

[0055] 532 Semi-cylindrical shock absorber protrusion

[0056] 54 mounting shaft

[0057] 55. Central Circular Area

[0058] 6. Motor rear cover

[0059] 61 Third screw hole Detailed Implementation

[0060] The following specific examples illustrate the implementation methods of this application. Those skilled in the art can easily understand the other advantages and effects of this application from the content disclosed herein. This application can also be implemented or applied through other different specific embodiments, and various details in this application can be modified or changed according to different viewpoints and application systems without departing from the spirit of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0061] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement the application. This application may be embodied in many different forms and is not limited to the embodiments described herein.

[0062] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0063] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0064] For the purpose of clearly describing this application, devices that are not relevant to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0065] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0066] When we say that a device is "above" another device, this can mean that it is directly above the other device, or it can mean that other devices are present in between. Conversely, when we say that a device is "directly" "above" another device, there are no other devices present in between.

[0067] Although the terms first, second, etc., are used in some instances herein to refer to various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, first interface and second interface, etc., are used. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0068] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this application. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in the specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0069] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the content of this present application, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0070] Figure 1 This is a cross-sectional view of the blower motor of this utility model. Figure 2 This is a cross-sectional view of the assembly state of the outer casing and heat sink plate in the blower motor of this utility model. Figure 3 This is a bottom view of the assembly state of the outer casing and heat sink plate in the blower motor of this utility model. Figure 4 This is a schematic diagram of the outer casing of the blower motor of this utility model. Figure 5 This is a top view of the heat sink in the blower motor of this utility model. Figure 6 This is a perspective view of the heat sink in the blower motor of this utility model. Figure 7 This is a perspective view of the rear cover of the blower motor in this utility model. Figures 1 to 7As shown, an embodiment of this utility model provides a blower motor, including: a heat sink 5, a housing 4, a motor 3, a motor cover 2, and a motor rear cover 6. The heat sink 5 has a mounting shaft 54 ​​in the central annular region on its first side. The heat sink 5 has a shock-absorbing sealing shoulder 51 surrounding the central annular region along its edge. The shock-absorbing sealing shoulder 51 includes at least an annular shoulder and a mating area extending outward from a portion of the annular shoulder. The mating area includes a first screw hole 52 and shock-absorbing protrusions 53 surrounding both sides of the first screw hole 52. The housing 4 is mated to the first side of the heat sink 5. The housing 4 includes a mounting hole 43 through which the mounting shaft 54 ​​passes and an circumferential sidewall 41 surrounding the mounting hole 43. The motor 3 is sleeved onto the mounting shaft 54. The motor cover 2 covers the motor 3. The motor rear cover 6 is connected to the second side of the heat sink 5. After the motor rear cover 6, heat sink 5, and outer shell 4 are stacked and screwed together, the end face of the circumferential side wall 41 is interference-fitted with the annular shoulder, forming an annular sealing pressure track 50. The shock-absorbing protrusion 53 of the heat sink 5 elastically supports the outer shell 4. This utility model creatively changes the traditional circular heat sink structure. By setting a docking area for screwing and shock absorption around the annular shoulder, and the annular shoulder and docking area are integrally formed, the integrated structure of the outer edge of the heat sink structure simultaneously achieves the effects of shock absorption, noise reduction, and sealing. It also greatly improves the component integration, reduces assembly difficulty, and improves production efficiency.

[0071] In a preferred embodiment, the damping protrusion 53 includes an annular damping shoulder 531 surrounding the first screw hole 52. The damping protrusion 53 also includes a plurality of semi-cylindrical damping protrusions 532 distributed along the trajectory of the annular damping shoulder 531. The central axis of the semi-cylindrical damping protrusions 532 points to the central axis of the first screw hole 52, but is not limited thereto.

[0072] In a preferred embodiment, both the shock-absorbing sealing shoulder 51 and the shock-absorbing protrusion 53 are integrally injection-molded rubber layers wrapped around the outer edge of the heat sink 5, but this is not a limitation. The shock-absorbing structure in this utility model adopts an integral injection-molded design, which can not only reduce vibration and noise but also seal and waterproof. The shock-absorbing structure adopts a circular column design, and the upper and lower surfaces of the shock-absorbing structure are designed with toothed grooves. It is made of TPE material, which effectively buffers vibration transmission and reduces noise propagation. The sealing surface adopts a flat design and is interference-fitted with the circumferential sidewall of the outer shell to prevent water from entering the motor and achieve a waterproof effect.

[0073] In a preferred embodiment, the mating area is exposed outside the annular sealing crimping track 50, but this is not a limitation.

[0074] In a preferred embodiment, the diameter of the annular sealing crimping track 50 is larger than the diameter of the central annular region, but is not limited thereto.

[0075] In a preferred embodiment, the outer casing 4 further includes a plurality of second screw holes 44 and a circumferential sidewall 42 disposed around the periphery of the circumferential sidewall 41, the circumferential sidewall 42 being fitted around the circumferential sidewall 41 and the second screw holes 44. The motor rear cover 6 is provided with a plurality of third screw holes 61 in its circumferential direction, which are screwed together with the third screw holes 61 of the motor rear cover 6, the first screw holes 52 of the heat sink 5, and the second screw holes 44 of the outer casing 4, but are not limited thereto.

[0076] In a preferred embodiment, the circumferential sidewall 42 of the housing 4 mates with the motor rear cover 6 to form a sealed space for accommodating the motor 3 and the heat sink 5, but this is not a limitation.

[0077] In a preferred embodiment, the housing 4 is provided with a positioning recess 45 surrounding the mounting hole 43, and the heat sink 5 is embedded in the positioning recess 45, but this is not a limitation.

[0078] In a preferred embodiment, the alignment recess 45 is a rounded rectangle, and the central annular area of ​​the heat sink 5, the shock-absorbing sealing shoulder 51, and the mating area are integrally formed to form a rounded rectangle pattern that overlaps with the alignment recess 45, but this is not a limitation.

[0079] In a preferred embodiment, the motor cover 2 is provided with an output hole, and the rotating shaft 1 of the motor 3 extends out of the motor cover 2 from the output hole, but is not limited thereto.

[0080] This invention connects the heat sink to the mounting housing via a shock-absorbing sealing shoulder, avoiding direct contact between the heat sink and the mounting housing. This prevents impacts between the heat sink and the mounting housing during vibration. The shock absorber dampens noise generated by collisions between the heat sink and the mounting housing, resulting in lower noise levels in the blower housing, blower assembly, and vehicle air conditioning system during operation, thus improving the noise reduction performance of the blower assembly. When used in a vehicle air conditioning system, the blower assembly produces less noise, thereby improving the comfort of vehicles using such systems. Furthermore, the shock-absorbing sealing shoulder also uses an interference fit with the circumferential sidewall of the housing to prevent water from entering the motor, enhancing waterproofing.

[0081] The specific embodiments of this utility model are as follows:

[0082] refer to Figures 1 to 7As shown, the blower motor of this utility model includes: a heat sink 5, a housing 4, a motor 3, a motor upper cover 2, and a motor rear cover 6. A mounting shaft 54 ​​is provided in the central annular region of the first side of the heat sink 5, and a shock-absorbing sealing shoulder 51 is provided around the edge of the heat sink 5, surrounding the central annular region. The central annular region of the heat sink 5, the shock-absorbing sealing shoulder 51, and the mating area are integrally formed into a rounded rectangular pattern. In this utility model, there are four mating areas, each forming one of the four corners of the rounded rectangular pattern. The shock-absorbing sealing shoulder 51 includes at least an annular shoulder and a mating area extending outward from a portion of the outer periphery of the annular shoulder. The mating area includes a first screw hole 52 and shock-absorbing protrusions 53 surrounding the first screw hole 52. In this utility model, there are four shock-absorbing protrusions 53, distributed at the four corners of the rounded rectangle. The housing 4 is mated to the first side of the heat sink 5, and the housing 4 includes a mounting hole 43 through which the mounting shaft 54 ​​passes and an circumferential sidewall 41 surrounding the mounting hole 43. Motor 3 is sleeved onto mounting shaft 54. Motor cover 2 covers motor 3. Motor rear cover 6 mates with the second side of heat sink 5. After the motor rear cover 6, heat sink 5, and outer shell 4 are stacked and screwed together, the end face of the circumferential side wall 41 is interference-fitted with the annular shoulder, forming an annular sealing pressure track 50. The shock-absorbing protrusions 53 on both sides of the heat sink 5 elastically support the outer shell 4 and motor rear cover 6, greatly enhancing the shock absorption effect. The shock-absorbing protrusions 53 include an annular shock-absorbing shoulder 531 surrounding the first screw hole 52, and several semi-cylindrical shock-absorbing protrusions 532 distributed along the track of the annular shock-absorbing shoulder 531. The central axis of the semi-cylindrical shock-absorbing protrusions 532 points towards the central axis of the first screw hole 52. The shock-absorbing sealing shoulder 51 and the shock-absorbing protrusions 53 are integrally molded rubber layers wrapped around the outer edge of the heat sink 5. The diameter of the annular sealing pressure track 50 is larger than the diameter of the central annular area, and the mating area is exposed outside the annular sealing pressure track 50. In this utility model, the shock-absorbing protrusion 53 adopts a cylindrical design with toothed structure on the upper and lower end faces. The overall height of the annular shock-absorbing shoulder 531 on both sides of the first screw hole 52 is 10 to 11 mm, the outer diameter of the annular shock-absorbing shoulder 531 is 17 to 18 mm, the height of the semi-cylindrical shock-absorbing protrusion 532 is 1.5 to 2 mm, and the tooth width of the semi-cylindrical shock-absorbing protrusion 532 is 1.5 to 2 mm, but not limited thereto.

[0083] The outer casing 4 also includes a plurality of second screw holes 44 and a circumferential sidewall 42 disposed around the periphery of the circumferential sidewall 41, the circumferential sidewall 42 being fitted around the circumferential sidewall 41 and the second screw holes 44. The motor rear cover 6 is provided with a plurality of third screw holes 61 circumferentially, which are screwed together with the third screw holes 61 of the motor rear cover 6, the first screw holes 52 of the heat sink 5, and the second screw holes 44 of the outer casing 4. The circumferential sidewall 42 of the outer casing 4 mates with the motor rear cover 6, forming a sealed space for accommodating the motor 3 and the heat sink 5. The outer casing 4 is provided with a positioning recess 45 surrounding the mounting hole 43, into which the heat sink 5 is embedded. The positioning recess 45 is a rounded rectangle, allowing the heat sink 5, with its rounded rectangular outer contour, to be embedded. The motor upper cover 2 is provided with an output hole, through which the shaft 1 of the motor 3 extends beyond the motor upper cover 2. The sealing surface and shock-absorbing structure of the blower in this utility model adopt an integrated injection molding design, which is wrapped around the end face of the frame. By adopting an integrated injection molding design, it not only ensures its excellent shock absorption and noise reduction effect, but also improves the waterproof rating, reduces the assembly difficulty, facilitates automated assembly on the production line, and improves production efficiency.

[0084] In summary, the purpose of this utility model is to provide a blower motor that can effectively buffer vibration transmission through an integrated component, thereby reducing vibration and noise while also providing a sealing and waterproof function, reducing assembly difficulty, and improving production efficiency.

[0085] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A blower motor, characterized in that, include: A heat sink (5) is provided with a mounting shaft (54) in the central annular area on the first side of the heat sink (5). A shock-absorbing sealing shoulder (51) is provided around the central annular area on the edge of the heat sink (5). The shock-absorbing sealing shoulder (51) includes at least an annular shoulder and a docking area extending outward from a partial outer periphery of the annular shoulder. The docking area includes a first screw hole (52) and a shock-absorbing protrusion (53) surrounding the first screw hole (52). A housing (4) is mated to the first side of the heat sink (5), the housing (4) including a mounting hole (43) through which the mounting shaft (54) passes and an circumferential sidewall (41) surrounding the mounting hole (43); A motor (3) is sleeved on the mounting shaft (54); A motor cover (2) is provided to cover the motor (3); A motor rear cover (6) is connected to the second side of the heat sink (5). After the motor rear cover (6), the heat sink (5) and the outer shell (4) are stacked and screwed together, the end face of the circumferential side wall (41) is interference-fitted with the annular shoulder to form an annular sealing pressing track (50). The shock-absorbing protrusion (53) of the heat sink (5) elastically supports the outer shell (4).

2. A blower motor as described in claim 1, characterized in that, The damping protrusion (53) includes an annular damping shoulder (531) surrounding the first screw hole (52), and the damping protrusion (53) also includes a plurality of semi-cylindrical damping protrusions (532) distributed along the trajectory of the annular damping shoulder (531), the central axis of the semi-cylindrical damping protrusions (532) pointing to the central axis of the first screw hole (52).

3. A blower motor as described in claim 2, characterized in that, The shock-absorbing sealing shoulder (51) and the shock-absorbing protrusion (53) are both integrally molded rubber layers that wrap around the outer edge of the heat sink (5).

4. A blower motor as described in claim 1, characterized in that, The docking area is exposed outside the annular sealing pressing track (50).

5. A blower motor as described in claim 4, characterized in that, The diameter of the annular sealing compression track (50) is greater than the diameter of the central annular region.

6. A blower motor as described in claim 1, characterized in that, The outer shell (4) also includes a plurality of second screw holes (44) and a circumferential sidewall (42) disposed around the periphery of the circumferential sidewall (41), wherein the circumferential sidewall (42) surrounds the circumferential sidewall (41) and the second screw holes (44); The motor rear cover (6) is provided with several third screw holes (61) in the circumferential direction. The third screw holes (61) of the motor rear cover (6), the first screw hole (52) of the heat sink (5) and the second screw hole (44) of the outer shell (4) are screwed together.

7. A blower motor as described in claim 6, characterized in that, The circumferential sidewall (42) of the outer casing (4) is engaged with the motor rear cover (6) to form a sealed space for accommodating the motor (3) and the heat sink (5).

8. A blower motor as described in claim 1, characterized in that, The outer casing (4) is provided with a positioning recess (45) surrounding the mounting hole (43), and the heat sink (5) is embedded in the positioning recess (45).

9. A blower motor as described in claim 8, characterized in that, The alignment recess (45) is a rounded rectangle. The central annular area of ​​the heat sink (5), the shock-absorbing sealing shoulder (51), and the docking area are integrally formed to form a rounded rectangle pattern that coincides with the alignment recess (45).

10. A blower motor as described in claim 1, characterized in that, The motor cover (2) is provided with an output hole, and the shaft (1) of the motor (3) extends out of the motor cover (2) from the output hole.

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