Motor and air conditioner

Abstract

The embodiment of the utility model provides a motor and an air conditioner. The motor comprises a rotor, a stator, two end covers and a damping ring. The rotor is rotatably accommodated inside the stator. The two end covers are arranged on the two opposite sides of the stator in the axial direction in a covering mode respectively. The periphery of at least one of the two end covers is sleeved with a vibration reduction ring, and at least one of the peripheral face of the vibration reduction ring and the shaft end face of the side, away from the rotor, of the vibration reduction ring forms a vibration reduction structure. The vibration reduction structure comprises at least one protrusion protruding out of the surface of the vibration reduction ring and / or at least one groove recessed into the surface of the vibration reduction ring. According to the motor provided by the embodiment of the invention, the bulges and / or the grooves are formed on the surface of the vibration reduction ring, so that the contact area between the outer peripheral surface and / or the shaft end surface of the vibration reduction ring and the mounting frame can be reduced, the dynamic modulus of the vibration reduction ring can be reduced, namely, the rigidity of the vibration reduction ring can be reduced, and the inherent frequency of the motor can be reduced.

Description

Technical Field

[0001] This application relates to the field of motor technology, and more particularly to a motor and an air conditioner. Background Technology

[0002] DC motors are widely used in household appliances, such as refrigerators and air conditioners. Because these appliances are located indoors, their noise levels are a major concern, and the noise generated by DC motors, as one of the sources of noise in these appliances, is also a subject of considerable attention. Utility Model Content

[0003] In view of this, the embodiments of this application aim to provide a motor and an air conditioner that help reduce motor vibration and noise.

[0004] This application provides an embodiment of a motor, including:

[0005] Rotor;

[0006] The stator, in which the rotor is rotatably housed;

[0007] Two end caps are respectively installed on opposite axial sides of the stator;

[0008] A vibration damping ring is provided on the outer periphery of at least one of the two end caps, and a vibration damping structure is formed on at least one of the outer peripheral surface of the vibration damping ring and the shaft end face of the vibration damping ring on the side away from the rotor.

[0009] The vibration damping structure includes at least one protrusion protruding from the surface of the vibration damping ring, and / or at least one groove recessed into the surface of the vibration damping ring.

[0010] In some embodiments, the thickness of the protrusion protruding from the surface of the damping ring is 0.5 mm to 2 mm; and / or, the depth of the groove is 0.5 mm to 2 mm.

[0011] In some implementations, the protrusion is a rib.

[0012] In some implementations, the cross-sectional profile of the rib is arc-shaped.

[0013] In some embodiments, the ribs formed on the outer peripheral surface extend axially along the damping ring; and / or, the ribs formed on the shaft end face extend radially along the damping ring.

[0014] In some embodiments, the outer peripheral surface is formed with a plurality of ribs, the plurality of ribs on the outer peripheral surface are arranged at intervals along the outer peripheral surface of the damping ring, the shaft end face is formed with a plurality of ribs, the plurality of ribs on the shaft end face are arranged radially, and the ribs on the outer peripheral surface and the ribs on the shaft end face are connected.

[0015] In some implementations, the cross-sectional profile of the groove is arc-shaped.

[0016] In some embodiments, the groove formed on the outer peripheral surface extends axially along the damping ring; and / or, the groove formed on the shaft end face extends radially along the damping ring.

[0017] In some embodiments, the outer peripheral surface is formed with a plurality of grooves, the plurality of grooves on the outer peripheral surface are arranged at intervals along the outer peripheral surface of the damping ring, the shaft end face is formed with a plurality of grooves, the plurality of grooves on the shaft end face are arranged radially, and the grooves on the outer peripheral surface are connected to the grooves on the shaft end face.

[0018] In some implementations, the damping ring is a rubber ring or a silicone ring.

[0019] This application provides an air conditioner, including an impeller, a mounting bracket, and a motor as described in any embodiment of this application. The rotor drives the impeller to rotate, and the vibration damping rings are respectively fitted around the outer periphery of the two end covers. The motor is fixed to the mounting bracket by the two vibration damping rings.

[0020] The motor provided in this application embodiment, by forming protrusions and / or grooves on the surface of the damping ring, helps to reduce the contact area between the outer peripheral surface and / or shaft end face of the damping ring and the mounting bracket, thereby helping to reduce the dynamic modulus of the damping ring, that is, helping to reduce the stiffness of the damping ring, and thus helping to reduce the natural frequency of the motor. Because the natural frequency of the motor is reduced, the minimum excitation frequency of the motor is more likely to exceed the natural frequency, thereby reducing the probability of resonance, and thus helping to reduce vibration and noise. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the motor provided in an embodiment of this application;

[0022] Figure 2 for Figure 1 A schematic cross-sectional view of the structure shown along the AA direction;

[0023] Figure 3 for Figure 2 The structure shown omits the structural diagrams of the shaft and rotor;

[0024] Figure 4 A schematic diagram of the vibration reduction structure provided in the embodiments of this application;

[0025] Figure 5 for Figure 4 The diagram shows a cross-sectional view of the structure along the axial direction of the damping ring.

[0026] Explanation of reference numerals in the attached figures

[0027] 10. Rotor; 20. Stator; 21. First opening; 22. Mounting cavity; 23. Second opening; 30. End cover; 31. First end cover; 31a. Shaft hole; 311. First protrusion; 311a. Receiving groove; 32. Second end cover; 321. Second protrusion; 321a. Opening groove; 40. Vibration damping ring; 41. Vibration damping structure; 40a. Outer peripheral surface; 40b. Shaft end face; 50. Rotating shaft. Detailed Implementation

[0028] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0029] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0031] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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 embodiments of this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] This application provides an embodiment of a motor; please refer to [link / reference]. Figure 2 The motor includes a rotor 10, a stator 20, and two end covers 30.

[0034] The rotor 10 is rotatably housed inside the stator 20. In this embodiment, the stator 20 serves as the external component of the motor.

[0035] Two end caps 30 are respectively installed on opposite axial sides of the stator 20. The end caps 30 help reduce dust, moisture, etc. entering the stator 20 and also provide support for the rotating shaft 50 described below.

[0036] For example, please refer to Figure 1 and Figure 2 The motor includes a damping ring 40, and the damping ring 40 is fitted around the outer periphery of at least one of the two end caps 30. By providing the damping ring 40, it helps to buffer the vibration transmitted by the motor to the mounting bracket below, thereby helping to reduce vibration and lower noise.

[0037] It is understandable that both end caps 30 may be fitted with vibration damping rings 40 on their outer peripheries (e.g., Figure 2 (As shown), or one of the two end caps 30 may have a vibration damping ring 40 fitted around its outer periphery.

[0038] The vibration damping ring 40 is made of an elastic material. For example, the vibration damping ring 40 can be a rubber ring or a silicone ring. In some other embodiments, the vibration damping ring 40 can also be made of other elastic materials.

[0039] In some embodiments, at least one of the outer peripheral surface 40a of the damping ring 40 and the shaft end surface 40b of the damping ring 40 on the side away from the rotor 10 is provided with a damping structure 41.

[0040] It is understandable that the vibration damping structure 41 may be formed on the outer peripheral surface 40a of the damping ring 40, while the vibration damping structure 41 may not be formed on the shaft end face 40b; or the vibration damping structure 41 may be formed on the shaft end face 40b on the side of the damping ring 40 away from the rotor 10, while the vibration damping structure 41 may not be formed on the outer peripheral surface 40a of the damping ring 40; or both the outer peripheral surface 40a and the shaft end face 40b on the side of the damping ring 40 away from the rotor 10 may have the vibration damping structure 41 formed (e.g., Figure 4 (As shown).

[0041] For example, the vibration damping structure 41 includes at least one protrusion protruding from the surface of the damping ring 40, and / or at least one groove recessed into the surface of the damping ring 40. By forming the protrusion and / or groove on the surface of the damping ring 40, it helps to reduce the contact area between the outer peripheral surface 40a and / or the shaft end face 40b of the damping ring 40 and the mounting bracket described below, thereby helping to reduce the dynamic modulus of the damping ring 40, that is, helping to reduce the stiffness of the damping ring 40, thereby helping to reduce the natural frequency of the motor.

[0042] Specifically, the dynamic modulus of the damping ring 40 is Ed, Ed = ζ T *ζ F *E, where ζ T ζ is the temperature coefficient; F is the shape factor, which is related to the ratio of contact area to free area; E is the static modulus. Reducing the contact area between the damping ring 40 and the mounting bracket helps to reduce the dynamic modulus of the damping ring 40.

[0043] Because the motor's natural frequency is reduced, the minimum excitation frequency of the motor is more likely to exceed the natural frequency, thereby reducing the probability of resonance and helping to reduce the vibration transmitted from the motor to the mounting bracket, thus reducing noise.

[0044] Furthermore, the protrusions create a gap between the surface of the damping ring 40 and the mounting bracket, which also helps dissipate heat from the damping ring 40. The grooves help guide airflow and also contribute to heat dissipation from the damping ring 40. This improved heat dissipation capacity of the damping ring 40 helps reduce the likelihood of it aging prematurely due to excessive temperature.

[0045] It is understandable that when the outer peripheral surface 40a of the damping ring 40 has a damping structure 41, "protruding from the surface of the damping ring 40" means protruding from the outer peripheral surface 40a. When the shaft end face 40b of the damping ring 40 away from the rotor 10 has a damping structure 41, "protruding from the surface of the damping ring 40" means protruding from the shaft end face 40b.

[0046] It is understandable that when the outer peripheral surface 40a of the damping ring 40 is formed with the damping structure 41, the surface recessed into the damping ring 40 refers to the surface recessed into the outer peripheral surface 40a. When the shaft end face 40b of the damping ring 40 is formed with the damping structure 41, the surface recessed into the damping ring 40 refers to the surface recessed into the shaft end face 40b.

[0047] For example, the ratio of the motor's excitation frequency to its natural frequency is not less than...

[0048] In some embodiments, such as Figure 5 As shown, the thickness h1 of the protrusion extending beyond the surface of the damping ring 40 is 0.5 mm to 2 mm (millimeters). That is, 0.5 mm ≤ h1 ≤ mm, and h1 can be 0.5 mm, 0.8 mm, 1 mm, 1.6 mm, 2 mm, etc. By controlling the thickness of the protrusion extending beyond the surface of the damping ring 40 within a reasonable range, the contact area is reduced while also helping to ensure that the structural strength of the damping ring 40 remains within a reasonable range.

[0049] In some embodiments, the groove depth h2 is 0.5mm to 2mm. That is, 0.5mm ≤ h2 ≤ mm, and h2 can be 0.5mm, 0.8mm, 1mm, 1.6mm, 2mm, etc. By controlling the groove depth within a reasonable range, the contact area is reduced, while also helping to ensure that the overall structural strength of the damping ring 40 is within a reasonable range.

[0050] For example, the protrusion is a rib. The rib has a moderate extension length, which is greater than the thickness mentioned above.

[0051] In some embodiments, the raised ribs formed on the outer peripheral surface 40a extend axially along the damping ring 40. This helps to improve the radial damping capacity of the damping ring 40 and reduce the vibration transmitted radially from the motor to the mounting bracket.

[0052] In some other embodiments, the ribs formed on the outer peripheral surface 40a may also extend circumferentially along the damping ring 40, in which case the ribs are distributed in a ring shape.

[0053] In other embodiments, the ribs formed on the outer peripheral surface 40a may extend spirally on the outer peripheral surface 40a.

[0054] In some embodiments, the raised ribs formed on the shaft end face 40b extend radially along the damping ring 40. This helps to improve the axial damping capacity of the damping ring 40 and reduce the vibration transmitted axially from the motor to the mounting bracket.

[0055] In some embodiments, the cross-sectional profile of the rib is arc-shaped. The arc-shaped rib is smoother and can better disperse the concentrated stress generated by the vibration of the motor, which helps to reduce the probability of cracking in local areas of the vibration damping ring 40 due to excessive stress, and improves the overall impact resistance and durability of the vibration damping ring 40.

[0056] It should be noted that the cross-section of the raised rib is perpendicular to its extension direction. For example, if the raised rib extends axially along the damping ring 40, its cross-section is perpendicular to the axial direction. If the raised rib extends radially along the damping ring 40, its cross-section is perpendicular to the radial direction.

[0057] For example, the cross-sectional shape of the rib is semi-circular.

[0058] In some embodiments, the outer peripheral surface 40a is formed with multiple ribs, which are spaced apart along the outer peripheral surface 40a of the damping ring 40. This helps to ensure uniform stress distribution on the outer peripheral surface 40a, and the multiple ribs can better disperse the vibration energy transmitted radially from the motor to the mounting bracket. Moreover, the spacing between adjacent ribs helps to guide airflow, which helps to dissipate heat from the damping ring 40 more quickly.

[0059] In some embodiments, the shaft end face 40b has multiple ribs arranged radially. This helps to ensure that the shaft end face 40b is subjected to uniform force, and the multiple ribs can better disperse the vibration energy transmitted from the motor along the axial direction to the mounting bracket.

[0060] For example, the ribs on the outer peripheral surface 40a and the ribs on the shaft end surface 40b are connected. This helps to further improve the vibration damping capacity of the vibration damping structure 41. It also facilitates manufacturing.

[0061] In some embodiments, the groove formed on the outer peripheral surface 40a extends along the axial direction of the damping ring 40.

[0062] In some embodiments, the groove formed on the shaft end face 40b extends radially along the damping ring 40.

[0063] In some embodiments, the cross-sectional profile of the groove is arc-shaped. Arc-shaped grooves help reduce local stress concentration.

[0064] It should be noted that the cross-section of the groove is perpendicular to the extending direction of the rib. For example, if the groove extends along the axial direction of the damping ring 40, the cross-section of the groove is perpendicular to the axial direction of the damping ring 40. If the groove extends radially along the damping ring 40, the cross-section of the groove is perpendicular to the radial direction of the damping ring 40.

[0065] For example, the cross-sectional profile of the groove is semi-circular.

[0066] For example, the outer peripheral surface 40a is formed with multiple grooves, which are spaced apart along the outer peripheral surface 40a of the damping ring 40. This helps to make the force on the outer peripheral surface 40a more uniform, and the multiple grooves help to better disperse the vibration energy transmitted radially from the motor to the mounting bracket. Moreover, the multiple grooves help to guide airflow, which helps to dissipate the heat of the damping ring 40 more quickly.

[0067] For example, the shaft end face 40b has multiple grooves arranged radially. This helps to ensure that the force is evenly distributed throughout the shaft end face 40b, and the multiple grooves can better distribute the energy transmitted by the motor to the mounting bracket along the axial direction.

[0068] For example, the groove on the outer peripheral surface 40a is connected to the groove on the shaft end surface 40b.

[0069] For ease of description, the two end caps 30 are referred to as the first end cap 31 and the second end cap 32, respectively. The motor includes a rotating shaft 50, which is connected to the rotor 10. The first end cap 31 is provided with a shaft hole 31a, through which the first axial end of the rotating shaft 50 passes. This facilitates the connection of the first axial end of the rotating shaft 50 to an external load (such as the impeller described below).

[0070] For example, the stator 20 includes a first opening 21, a second opening 23, and a mounting cavity 22, which connects the first opening 21 and the second opening 23. The rotor 10 is rotatably housed in the mounting cavity 22. A first end cap 31 covers the first opening 21, and a second end cap 32 covers the second opening 23.

[0071] In this embodiment, the first axial end of the rotating shaft 50 passes through the first opening 21 and exits the shaft hole 31a. During motor assembly, the rotor 10 is inserted into the mounting cavity 22 through the first opening 21.

[0072] In some embodiments, the motor includes a first bearing, and a portion of the first end cover 31 protrudes along the axial direction of the shaft 50 toward a direction away from the mounting cavity 22 to form a first protrusion 311.

[0073] For example, the first protrusion 311 forms a receiving groove 311a communicating with the first opening 21 on the side facing the mounting cavity 22. The first bearing is disposed in the receiving groove 311a, and the rotating shaft 50 is connected to the first bearing. That is, the first bearing is sleeved on the rotating shaft 50 to provide axial and radial support for the portion of the rotating shaft 50 near the second end.

[0074] For example, the damping ring 40 is fitted around the outer periphery of the first protrusion 311.

[0075] In some embodiments, a portion of the second end cap 32 protrudes along the axial direction of the pivot 50 toward a direction away from the mounting cavity 22 to form a second protrusion 321.

[0076] For example, the second protrusion has an opening groove 321a that communicates with the second opening 23 on the side facing the mounting cavity, and the axial second end of the rotating shaft 50 is accommodated in the opening groove 321a.

[0077] For example, the damping ring 40 is fitted around the outer periphery of the second protrusion 321.

[0078] In some embodiments, the motor includes a second bearing disposed within an opening slot 321, and the axial second end of the rotating shaft 50 is connected to the second bearing. This allows the second bearing to provide radial and axial support to the axial second end of the rotating shaft 50, helping to improve the stability of the rotating shaft 50 and the rotor 10 during rotation.

[0079] For example, such as Figure 3 As shown, the diameter D1 of the first opening 21 is smaller than the diameter D2 of the second opening 23. This allows the radial thickness of the cavity wall of the mounting cavity 22 near the first opening 21 to be greater than the radial thickness of the cavity wall of the mounting cavity 22 near the second opening 23, resulting in a higher load-bearing capacity at the end of the stator 20 near the first opening 21 compared to the end near the second opening 23. Furthermore, the rotating shaft 50 extends from the end of the stator 20 with the greater load-bearing capacity, making the overall motor structure more stable and helping to reduce motor vibration and noise.

[0080] Based on the motor provided in the embodiments of this application, an air conditioner is provided in the embodiments of this application. The air conditioner includes an impeller, a mounting bracket, and a motor in any embodiment of this application.

[0081] Motors can be used in the outdoor unit of air conditioners, as well as indoor floor-standing or wall-mounted units. When motors are used in indoor floor-standing or wall-mounted units, the noise can affect users' rest, especially when the air conditioner is running at night, as users are particularly sensitive to noise. Therefore, motor noise control is particularly important. The motor provided in this application helps reduce noise during motor operation and is suitable for use in air conditioners.

[0082] In some embodiments, the rotor 10 drives the impeller to rotate.

[0083] For example, the first axial end of the rotating shaft 50 is connected to the impeller, and the rotor 10 drives the rotating shaft 50 to rotate, thereby driving the impeller to rotate.

[0084] In some embodiments, the motor is fixed to the mounting bracket by two damping rings 40.

[0085] In some embodiments, the stator 20 is arranged at a distance from the mounting bracket. That is, the stator 20 is suspended and does not contact the mounting bracket, which helps to reduce the vibration transmission path, reduce the mechanical contact points, reduce the vibration transmitted to the mounting bracket, and reduce noise.

[0086] The various embodiments / implementations provided in this application can be combined with each other without creating contradictions.

[0087] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An electric machine characterized in that, The motor comprises: a rotor; a stator, the rotor being rotatably accommodated in the interior of the stator; two end covers, respectively covering the axially opposite sides of the stator; a damping ring, the outer periphery of at least one of the two end covers being sleeved with the damping ring, at least one of the outer peripheral surface of the damping ring and the axial end surface of the damping ring away from the rotor being formed with a damping structure; the damping structure comprises at least one protrusion protruding from the surface of the damping ring, and / or at least one groove recessed in the surface of the damping ring.

2. The electric machine of claim 1, wherein, The thickness of the protrusion protruding from the surface of the damping ring is 0.5mm-2mm; and / or the depth of the groove is 0.5mm-2mm.

3. The electric machine of claim 1, wherein, The protrusion is a protruding rib.

4. The electric machine of claim 3, wherein, The cross-sectional profile shape of the protruding rib is arc-shaped.

5. The electric machine of claim 3, wherein, The protruding rib formed on the outer peripheral surface extends in the axial direction of the damping ring; and / or the protruding rib formed on the axial end surface extends in the radial direction of the damping ring.

6. The electric machine of claim 3, wherein, The outer peripheral surface is formed with a plurality of protruding ribs, the plurality of protruding ribs on the outer peripheral surface are arranged at intervals along the outer peripheral surface of the damping ring, the axial end surface is formed with a plurality of protruding ribs, the plurality of protruding ribs on the axial end surface are arranged in a radial manner, and the protruding ribs on the outer peripheral surface and the protruding ribs on the axial end surface are connected.

7. The electric machine of claim 1, wherein, The cross-sectional profile shape of the groove is arc-shaped.

8. The electric machine of claim 1, wherein, The groove formed on the outer peripheral surface extends in the axial direction of the damping ring; and / or the groove formed on the axial end surface extends in the radial direction of the damping ring.

9. The electric machine of claim 8, wherein, The outer peripheral surface is formed with a plurality of grooves, the plurality of grooves on the outer peripheral surface are arranged at intervals along the outer peripheral surface of the damping ring, the axial end surface is formed with a plurality of grooves, the plurality of grooves on the axial end surface are arranged in a radial manner, and the grooves on the outer peripheral surface and the grooves on the axial end surface are connected.

10. The electric machine of any of claims 1-9, wherein, The damping ring is a rubber ring or a silica gel ring.

11. An air conditioner characterized by comprising: The motor comprises a impeller, a mounting frame, and the motor of any one of claims 1-10, the rotor driving the impeller to rotate, the outer periphery of each of the two end covers being sleeved with the damping ring, and the motor being fixed to the mounting frame through the two damping rings.

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