Motor vibration damping structure, motor and electrical equipment

Abstract

This invention discloses a motor vibration damping structure, a motor, and an electrical device. The motor vibration damping structure includes a motor base, a mounting cover, a first damping frame, and a second damping component. Both the first and second damping components are located between the motor base and the mounting cover, and are spaced apart along the axial direction. The first damping component is embedded in a limiting groove, and the first and second limiting portions are inserted into each other radially along the motor base. Both the motor and the electrical device include the motor vibration damping structure. In this invention, the first and second damping components have a gap along the axial direction of the motor base, and at this gap, the motor base and the mounting cover are separated, reducing the contact area between the motor base and the damping component. This results in less vibration transmitted from the motor base to the mounting cover. Furthermore, by setting the first and second damping components, the motor base and the mounting cover are flexibly connected, avoiding hard friction and collision between them, and weakening the transmission of vibration.

Description

Technical Field

[0001] This invention relates to the field of motor vibration reduction technology, and in particular to a motor vibration reduction structure, a motor, and electrical equipment. Background Technology

[0002] Vibration is inevitable during motor operation. When the motor is applied to the corresponding equipment, it causes the equipment to shake. In related technologies, a highly flexible component is placed between the motor and the equipment to absorb the vibration. Usually, the end of the flexible component is flanged and wrapped around the end face of the motor housing to fix the flexible component to the motor housing. However, the vibration of the motor can still be transmitted to the equipment through the flexible component, resulting in poor vibration absorption. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a motor vibration damping structure that can improve the vibration damping effect on the motor.

[0004] The present invention also proposes a motor having the above-mentioned motor vibration reduction structure.

[0005] The present invention also proposes an electrical device having the above-mentioned motor.

[0006] According to a first aspect of the present invention, a motor vibration damping structure includes:

[0007] Motor mount;

[0008] A mounting cover is arranged around the outside of the motor base, and there is a gap between the motor base and the mounting cover;

[0009] The first shock absorber is located between the motor base and the mounting cover;

[0010] The second shock absorber is located between the motor base and the mounting cover, and the first shock absorber and the second shock absorber are distributed at intervals along the axial direction of the motor base;

[0011] The outer wall of the motor base and / or the inner wall of the mounting cover are provided with a limiting groove. The first shock absorber is embedded in the limiting groove. The outer wall of the motor base is provided with a first limiting part, and the inner wall of the second shock absorber is provided with a second limiting part. The first limiting part and the second limiting part are inserted into each other along the radial direction of the motor base.

[0012] The motor vibration damping structure according to embodiments of the present invention has at least the following beneficial effects:

[0013] In this invention, the first damping component and the second damping component have a gap in the axial direction of the motor base, and at this gap, the motor base and the mounting cover are separated from each other, which reduces the contact area between the motor base and the damping component. The vibration transmitted from the motor base to the mounting cover is small. Furthermore, by setting the first damping component and the second damping component, the motor base and the mounting cover are flexibly connected, avoiding hard friction and collision between the motor base and the mounting cover, and weakening the transmission of vibration.

[0014] According to some embodiments of the present invention, the first shock absorber is disposed around the outer periphery of the motor base and abuts against the motor base and the mounting cover.

[0015] According to some embodiments of the present invention, a plurality of second shock absorbers are provided, and the plurality of second shock absorbers are distributed at circumferential intervals along the motor base.

[0016] According to some embodiments of the present invention, the mounting cover includes a limiting protrusion protruding toward the motor mount, one end of the second shock absorber abuts against the limiting protrusion along the axial direction of the motor mount, and the other end of the second shock absorber abuts against the end face of the motor mount.

[0017] A motor according to a second aspect embodiment of the present invention includes:

[0018] The motor vibration damping structure of the first aspect embodiment;

[0019] The housing has a motor mount arranged around its outer periphery, and an air duct is provided between the motor mount and the housing, with an air inlet and an air outlet forming at both ends of the air duct, respectively.

[0020] The guide vanes are located inside the air duct, and the two opposite sides of the guide vanes are respectively connected to the housing and the motor base.

[0021] According to some embodiments of the present invention, the second shock absorber includes a first air guide portion, which is located at one end of the motor base away from the air inlet, and the first air guide portion is inclined away from the housing along the side wall of the housing in a direction away from the air inlet.

[0022] According to some embodiments of the present invention, the motor further includes a second air guide portion, which is arranged around the end face of the housing near the air outlet, and the side wall of the second air guide portion facing away from the motor base is inclined toward the motor base in a direction away from the air inlet.

[0023] According to some embodiments of the present invention, the second limiting part protrudes toward the motor base relative to the inner wall of the second shock absorber, and the guide vane is provided with a mounting groove on the side facing the motor base, and the second limiting part is embedded in the mounting groove.

[0024] According to some embodiments of the present invention, the motor base includes a first base and a second base distributed along the axial direction, and the guide vane includes a first guide section and a second guide section arranged along the axial direction. The first guide section is located between the first base and the housing, and the second guide section is located between the second base and the housing. The first guide section is bent circumferentially along the housing, and the extension direction of the second guide section is parallel to the axial direction of the housing.

[0025] An electrical appliance according to a third aspect embodiment of the present invention includes:

[0026] The motor of the second aspect embodiment;

[0027] The main body of the equipment is connected to the mounting cover.

[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 present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0030] Figure 1 This is a schematic diagram of one embodiment of the motor vibration damping structure of the present invention;

[0031] Figure 2 for Figure 1 Cross-sectional view of the vibration damping structure of the electric motor;

[0032] Figure 3 for Figure 2 A schematic diagram of one embodiment of the second shock absorber;

[0033] Figure 4 for Figure 2 A schematic diagram of one embodiment of the motor mount;

[0034] Figure 5 for Figure 2 A cross-sectional view of one embodiment of the mounting cover;

[0035] Figure 6 This is a cross-sectional view of one embodiment of the motor of the present invention;

[0036] Figure 7 for Figure 6 A schematic diagram of one embodiment of the guide vane.

[0037] Figure label:

[0038] Motor base 100, first limiting part 110, first base 120, second base 130; mounting cover 200, limiting groove 210, limiting ridge 220, limiting protrusion 230; first shock absorber 300; second shock absorber 400, second limiting part 410, first air guide part 420; housing 500, air duct 510, air inlet 520, air outlet 530, second air guide part 540; guide vane 600, mounting groove 610, first guide section 620, second guide section 630; stator 700; rotating shaft 800. Detailed Implementation

[0039] 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.

[0040] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are 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 limiting this invention.

[0041] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0042] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0043] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the 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.

[0044] An embodiment of the present invention provides a motor vibration damping structure, referring to... Figure 1 and Figure 2 The motor vibration damping structure includes a motor base 100, a mounting cover 200, a first damping element 300, and a second damping element 400. The mounting cover 200 is arranged around the outside of the motor base 100, and there is a gap between the motor base 100 and the mounting cover 200. The first damping element 300 and the second damping element 400 are both located between the motor base 100 and the mounting cover 200, and both are used to reduce the vibration transmitted from the motor base 100 to the mounting cover 200. Specifically, the outer wall of the motor base 100 and / or the inner wall of the mounting cover 200 are provided with a limiting groove 210. The first damping element 300 is embedded in the limiting groove 210 to limit the first damping element 300 between the motor base 100 and the mounting cover 200, so that the first damping element 300 maintains stable contact with the motor base 100 and the mounting cover 200, and plays a damping role; see reference. Figure 3 and Figure 4 The outer wall of the motor base 100 is provided with a first limiting part 110, and the inner wall of the second shock absorber 400 is provided with a second limiting part 410. The first limiting part 110 and the second limiting part 410 are inserted into each other in the radial direction of the motor base 100. Due to the mutual limiting of the first limiting part 110 and the second limiting part 410, the second shock absorber 400 is stably installed between the motor base 100 and the mounting cover 200, and plays a role in shock absorption.

[0045] It should be noted that in this embodiment, the first damping member 300 and the second damping member 400 are distributed at intervals along the axial direction of the motor base 100. Therefore, there is a gap between the first damping member 300 and the second damping member 400 in the axial direction of the motor base 100. At this gap, the motor base 100 and the mounting cover 200 are separated from each other, which reduces the contact area between the motor base 100 and the damping member. The vibration transmitted from the motor base 100 to the mounting cover 200 is small. Furthermore, by setting the first damping member 300 and the second damping member 400, the motor base 100 and the mounting cover 200 are flexibly connected, avoiding hard friction and collision between the motor base 100 and the mounting cover 200, and weakening the transmission of vibration and noise.

[0046] It should be noted that, since the first damping component 300 and the second damping component 400 are axially spaced and separated from each other, the first damping component 300 and the second damping component 400 of different materials can be selected according to the vibration amplitude of different areas of the motor base 100. The first damping component 300 and the second damping component 400 can then be installed at corresponding positions on the motor base 100 to provide targeted vibration damping for different areas of the motor base 100. It is conceivable that both the first damping component 300 and the second damping component 400 should be made of flexible material to ensure that they are tightly attached to the outer wall of the motor base 100 and the inner wall of the mounting cover 200, and absorb the vibration generated by the motor base 100 through deformation.

[0047] Furthermore, since the first damping member 300 and the second damping member 400 are spaced apart axially, space is provided for the structural design of the motor base 100 or mounting cover 200, which is beneficial to improving the structural strength of the motor base 100 or mounting cover 200. For example, the motor base 100 or mounting cover 200 can be thickened at the interval between the first damping member 300 and the second damping member 400 to fit into the gap between them. This can limit the first damping member 300 or the second damping member 400 axially and increase the structural strength of the motor base 100 or mounting cover.

[0048] In one embodiment, the first shock absorber 300 is arranged around the outer periphery of the motor base 100. The inner and outer sides of the first shock absorber 300 abut against the motor base 100 and the mounting cover 200, respectively. The first shock absorber 300 is squeezed between the motor base 100 and the mounting cover 200, so that the first shock absorber 300 is in close contact with the motor base 100 and the mounting cover 200. In addition, since the first shock absorber 300 is annular and the first shock absorber 300 and the second shock absorber 400 are spaced apart, it can achieve the effect of centering the motor base 100 and preventing swaying.

[0049] The first damping component 300 can be a silicone ring, a rubber ring, etc. The first damping component 300 is easy to obtain and has a low cost.

[0050] like Figure 5 As shown, in one embodiment, the inner wall of the mounting cover 200 is provided with a limiting groove 210, and a portion of the first damping member 300 is embedded in the limiting groove 210. The limiting groove 210 limits the first damping member 300 in the axial direction, and a portion of the first damping member 300 protrudes to the outside of the limiting groove 210 and abuts against the motor base 100, thereby realizing a flexible connection between the mounting cover 200 and the motor base 100.

[0051] Furthermore, the inner wall of the mounting cover 200 protrudes towards the electronic base and is provided with limiting ridges 220. There are at least two limiting ridges 220, which are located on both sides of the limiting groove 210. Thus, the limiting ridges 220 are located on both sides of the first damping member 300 and abut against the first damping member 300. By providing the limiting ridges 220, the limiting effect on the first damping member 300 can be strengthened, and the structural strength of the mounting cover 200 can be improved.

[0052] Multiple first shock absorbers 300 can be provided, and the multiple first shock absorbers 300 are distributed at intervals along the axial direction of the motor base 100, with adjacent first shock absorbers 300 being separated from each other; different first shock absorbers 300 can be made of different materials, and multiple first shock absorbers 300 can be used in combination to optimize the shock absorption effect on the motor base 100.

[0053] In one embodiment, the second shock absorber 400 is annular and is arranged around the outer periphery of the motor base 100, so that the entire outer peripheral surface of the second shock absorber 400 is in contact with the mounting cover 200 and the entire inner peripheral surface of the second shock absorber 400 is in contact with the motor base 100, and the connection strength between the motor base 100 and the mounting cover 200 is high.

[0054] In other embodiments, multiple second damping members 400 are provided, and the multiple second damping members 400 are distributed at intervals along the circumference of the motor base 100. Adjacent second damping members 400 have gaps in the circumference of the motor base 100, which can further reduce the contact area between the motor base 100 and the damping members, as well as the vibration transmitted from the motor base 100 to the mounting cover 200.

[0055] To facilitate the assembly of the second shock absorber 400, it is designed as a ring and fitted onto the outside of the motor base 100, thus enabling its installation. The second shock absorber 400 also has a through hole that extends radially through the motor base 100. This through hole reduces the contact area between the motor base 100 and the second shock absorber 400, further reducing vibration. In another embodiment, the second shock absorber 400 is designed as a ring and surrounds the outer periphery of the motor base 100. Multiple protrusions are provided on the sidewall of the second shock absorber 400 facing the motor base 100 or the sidewall of the second shock absorber 400 facing the mounting cover 200. These protrusions abut against the motor base 100 or the mounting cover 200, with gaps between adjacent protrusions, which also reduces the contact area between the motor base 100 and the second shock absorber 400.

[0056] In one embodiment, the first limiting part 110 protrudes from the outer wall of the motor base 100 toward the mounting cover 200, and the second limiting part 410 is recessed from the inner wall of the second shock absorber 400 toward the mounting cover 200. The first limiting part 110 is inserted into the second limiting part 410, and the first limiting part 110 and the second limiting part 410 mutually limit each other in the axial and circumferential directions of the motor base 100. In another embodiment, as... Figure 3 and Figure 4 As shown, the first limiting part 110 is recessed on the outer wall of the motor base 100 and faces away from the mounting cover 200, and the second limiting part 410 is protruding on the inner wall of the second shock absorber 400 and faces away from the mounting cover 200. The second limiting part 410 is inserted into the first limiting part 110, and the first limiting part 110 and the second limiting part 410 mutually limit each other in the axial and circumferential directions of the motor base 100.

[0057] In addition, such as Figure 5 As shown, the mounting cover 200 includes a limiting protrusion 230 protruding toward the motor base 100. One end of the second damping member 400 abuts against the limiting protrusion 230 along the axial direction of the motor base 100, and the other end of the second damping member 400 abuts against the end face of the motor base 100. Thus, both ends of the second damping member 400 are limited by the limiting protrusion 230 and the end face of the motor base 100, respectively, and can be stably installed between the mounting cover 200 and the motor base 100.

[0058] like Figure 6 As shown, the present invention also provides a motor, including the above-mentioned motor vibration damping structure, and further including a housing 500 and a guide vane 600. The motor base 100 is arranged around the outer periphery of the housing 500. An air duct 510 is provided between the motor base 100 and the housing 500. An air inlet 520 and an air outlet 530 are respectively formed at both ends of the air duct 510. The guide vane 600 is located inside the air duct 510, and the opposite sides of the guide vane 600 are respectively connected to the housing 500 and the motor base 100. The guide vane 600 is used to guide the airflow entering the air duct 510 so that the airflow is blown out along the axial direction of the motor base 100.

[0059] It should be noted that the housing 500 contains a stator 700 and a rotating shaft 800. The stator 700 is arranged around the outside of the rotating shaft 800. An impeller can be connected to the end of the rotating shaft 800. The impeller rotates with the rotating shaft 800 and generates airflow. The airflow enters the air duct 510 through the air inlet 520 and is discharged from the air outlet 530 by the guide vanes 600. The vibration generated by the rotation of the rotating shaft 800 and the vibration generated by the airflow in the air duct 510 can be transmitted outward through the motor base 100. The vibration transmission from the motor base 100 to the mounting cover 200 can be reduced by the spaced first damping member 300 and second damping member 400 between the motor base 100 and the mounting cover 200.

[0060] Furthermore, the second shock absorber 400 includes a first air guide 420, which is located at the end of the motor base 100 facing away from the air inlet 520 and abuts against the end face of the motor base 100. The first air guide 420 is inclined away from the housing 500 in a direction away from the air inlet 520 towards the side wall of the housing 500, so that the first air guide 420 is flared. When the motor is working, a high-speed airflow is generated in the air duct 510. Since the air duct 510 is arranged around the outside of the housing 500, a negative pressure zone is easily generated in the area of ​​the housing 500 facing away from the air duct 510 under the drive of the high-speed airflow. Turbulence exists in the airflow in the negative pressure zone, affecting the air pressure and air speed at the air outlet 530. Based on this, by setting the first air guide 420 to be flared, the first air guide 420 guides the airflow discharged from the air outlet 530 to diffuse, which facilitates airflow. Moreover, the airflow is far away from the central area of ​​the housing 500, which can reduce the negative pressure zone and its impact on the airflow.

[0061] Furthermore, the first air guide 420 abuts against the end face of the motor base 100, and the inner edges of the two overlap at the joint, so that the inner wall of the motor base 100 and the inner wall of the first air guide 420 transition smoothly, so that the airflow blown out from the air outlet 530 is directly guided by the first air guide 420 and diffused, reducing the collision between the airflow and the first air guide 420 when transitioning to the first air guide 420, and reducing noise.

[0062] It should be noted that the first air guide 420 abuts against the end face of the motor base 100 in the direction of the air inlet 520, and the end face of the second shock absorber 400 abuts against the limiting protrusion 230 in the direction of the air inlet 520. The second shock absorber 400 is stably installed between the motor base 100 and the mounting cover 200 and provides airflow guidance.

[0063] The motor also includes a second air guide section 540, which is arranged around the end face of the housing 500 near the air outlet 530. The side wall of the second air guide section 540 facing away from the motor base 100 is inclined toward the motor base 100 in a direction away from the air inlet 520, so that the second air guide section 540 is flared. The wall thickness of the second air guide section 540 gradually decreases in the direction away from the air inlet 520. Therefore, the airflow in the air duct 510 can gradually move away from the negative pressure area and separate from the negative pressure area, which can reduce the interference of the negative pressure area on the airflow.

[0064] In one embodiment, when the second limiting part 410 is configured as a protrusion, the second limiting part 410 protrudes towards the motor base 100 relative to the inner wall of the second damping member 400. The guide vane 600 has a mounting groove 610 on its side facing the motor base 100, and the second limiting part 410 is embedded in the mounting groove 610 to limit the movement of the second damping member 400. It should be noted that the first limiting part 110 is configured as a radially penetrating hole in the motor base 100, which communicates with the mounting groove 610. The second limiting part 410 is simultaneously inserted into both the mounting hole and the mounting groove 610, thereby fixing the second damping member 400 between the mounting cover 200 and the motor base 100.

[0065] In this embodiment, the second limiting part 410 is simultaneously inserted into the first limiting part 110 and the guide vane 600, increasing the insertion depth of the second limiting part 410 and increasing the limiting strength of the second limiting part 410; and by utilizing the thickness of the guide vane 600 in the circumferential direction of the motor base 100, the guide vane 600 and the motor base 100 cooperate to limit the second shock absorber 400.

[0066] It should be noted that the guide vanes 600 are detachably connected to the motor base 100 and the housing 500 on opposite sides. For example, the inner wall of the motor base 100 and the outer wall of the housing 500 are provided with slots for the guide vanes 600 to be inserted. In addition, the thickness of the guide vanes 600 in the circumferential direction gradually increases from the air inlet 520 to the air outlet 530. On the one hand, the guide vanes 600 have sufficient thickness to provide the mounting slots 610 for the second limiting part 410 to be inserted. On the other hand, since a negative pressure zone is generated on the leeward side of the guide vanes 600, which interferes with the airflow, increasing the thickness of the guide vanes 600 reduces the inclination of the leeward side of the guide vanes 600, which helps to reduce the negative pressure zone and its impact on the airflow.

[0067] Specifically, such as Figure 7 As shown, the motor base 100 includes a first base 120 and a second base 130 distributed along the axial direction. The guide vane 600 includes a first guide section 620 and a second guide section 630 arranged along the axial direction. The first guide section 620 is located between the first base 120 and the housing 500, and the second guide section 630 is located between the second base 130 and the housing 500. The first guide section 620 is curved circumferentially around the housing 500, and the extension direction of the second guide section 630 is parallel to the axial direction of the housing 500. The first guide section 620 is located near the air inlet 520, and the second guide section 630 is located near the air outlet 530. The airflow generated by the impeller has a certain velocity component in the circumferential direction. The airflow first enters the air duct 510 through the air inlet 520. The curved shape of the first guide section 620 guides the airflow in the circumferential direction, causing the airflow to gradually flow axially. Finally, guided by the second guide section 630, the airflow is discharged from the air outlet 530, giving the airflow a high axial degree.

[0068] The thickness of both the first guide section 620 and the second guide section 630 can gradually change along the axial direction, or the thickness of the second guide section 630 can remain unchanged while the thickness of the first guide section 620 gradually changes along the axial direction.

[0069] An embodiment of the present invention also provides an electrical device, including the aforementioned motor and a device body connected to a mounting cover 200. Vibration transmitted from the motor to the mounting cover 200 and the device body can be reduced by providing a first damping member 300 and a second damping member 400 within the motor mount 100 and the mounting cover 200. The device body includes an actuator for connecting to and being driven by the motor to rotate. For example, if the electrical device is a fan, the actuator is an impeller connected to a rotating shaft 800 within the motor.

[0070] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. An electric machine characterized in that, The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively.

2. The electric machine of claim 1, wherein, The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively.

3. The electric machine of claim 1, wherein, The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively.

4. The electric machine of claim 1, wherein, The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively.

5. The electric machine of claim 1, wherein, The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively.

6. The electric machine of claim 1, wherein, The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively.

7. The electric machine of claim 1, wherein, The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively.

8. An electrical device, characterized by The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an air outlet respectively. The motor further comprises a shell, the motor base is annularly arranged on the outer periphery of the shell, and an air duct is formed between the motor base and the shell, two ends of the air duct form an air inlet and an

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