Damping assembly, motor and fan

Abstract

The invention provides a damping assembly, a motor and a fan. The damping assembly comprises an elastic sleeve gasket which comprises a bottom gasket, an inner wall and an outer wall, the bottom gasket is of an annular structure, the inner wall is connected to the inner circumferential side of the bottom gasket and extends in the axial direction of the bottom gasket, a mounting shaft hole is formed in the inner circumferential side of the inner wall, the outer wall is arranged on the circumferential outer side of the inner wall, one end of the outer wall is connected to the bottom gasket, and the other end of the outer wall extends in the axial direction of the bottom gasket; an annular cavity is formed between the inner wall and the outer wall; the supporting sleeve is of a rigid structure and comprises a shaft barrel and a limiting supporting part fixedly arranged on the periphery of the shaft barrel, the shaft barrel is located in the annular cavity and fixedly connected with the inner wall and the outer wall, and the limiting supporting part is arranged in the outer wall in a penetrating mode and extends out of the outer wall. According to the damping assembly, the problems of obvious vibration transmission, poor damping effect and insufficient assembly stability caused by rigid connection between the fan blade and the motor rotating shaft in the prior art can be solved.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically, to a vibration damping component, a motor, and a fan. Background Technology

[0002] In the assembly and operation of air conditioning fan systems, traditional installation methods generally employ a combination of retaining rings, a rotating shaft, fan blades, and locking nuts. Specifically, the fan blades are mounted on the motor's rotating shaft, initially positioned using retaining rings, and finally locked in place with nuts to ensure stability during high-speed rotation. However, this rigid connection method directly transmits the motor's vibrations along the rotating shaft to the fan blades when the motor is running. When the vibration frequency approaches or coincides with the fan blades' natural frequency, the hard contact between the fan blades and retaining rings amplifies the vibration energy, leading to resonance and ultimately manifesting as significant noise pollution. In severe cases, this can even affect the normal operation of the equipment and the user experience.

[0003] To mitigate this problem, a common industry solution is to introduce vibration-damping rotors or fan blades. Vibration-damping rotors absorb vibrations by adding specific elastic elements internally or externally; vibration-damping fan blades integrate damping materials or designs into their own structure to reduce vibration propagation. While these solutions can reduce noise levels to some extent, they often come with higher production costs. Vibration-damping rotors and fan blades require specialized materials and complex manufacturing processes, which not only increases product price but may also lead to longer production cycles and reduced production efficiency. Furthermore, the structural complexity of these vibration-damping measures increases design difficulty and limits their reliability and applicability under certain environmental conditions.

[0004] In some air conditioning fan systems, attempts have been made to install damping rubber pads between the retaining ring and the fan blades, hoping to absorb some vibration energy through their compressive deformation. However, this approach generally suffers from limited damping effect, poor assembly stability, and unreliable limiting structures. Especially under high-speed or high-vibration environments, it is difficult to effectively absorb vibration energy, resulting in unsatisfactory overall damping performance. Summary of the Invention

[0005] The main objective of this invention is to provide a shock-absorbing component, a motor, and a fan that can solve the problems of significant vibration transmission, poor shock absorption effect, and insufficient assembly stability caused by the rigid connection between the existing fan blades and the motor shaft.

[0006] To achieve the above objectives, according to one aspect of the present invention, a vibration damping component is provided, comprising:

[0007] The elastic sleeve includes a base, an inner wall, and an outer wall. The base has an annular structure. The inner wall is connected to the inner circumferential side of the base and extends along the axial direction of the base. The inner circumferential side of the inner wall forms a mounting shaft hole. The outer wall is located on the circumferential outer side of the inner wall, with one end connected to the base and the other end extending along the axial direction of the base. An annular cavity is formed between the inner wall and the outer wall.

[0008] The support sleeve is a rigid structure. The support sleeve includes a shaft cylinder and a limiting support part fixedly disposed on the outer periphery of the shaft cylinder. The shaft cylinder is located in an annular cavity and is fixedly connected to the inner wall and the outer wall. The limiting support part passes through the outer wall and extends out from the outer wall.

[0009] Furthermore, the shaft and the limiting support are integrally formed.

[0010] Furthermore, the support sleeve and the elastic sleeve are integrally injection molded.

[0011] Furthermore, the shaft and the limiting support are detachably connected, and the shaft and the elastic sleeve are integrally injection molded.

[0012] Furthermore, the shaft cylinder has a perforated hole that penetrates radially through the cylinder wall.

[0013] Furthermore, the limiting support includes a support column and a limiting protrusion disposed on the top of the support column.

[0014] Furthermore, the top of the limiting protrusion is a spherical structure, and the projected area of ​​the limiting protrusion on the cross-section of the support column is greater than the cross-sectional area of ​​the support column.

[0015] Furthermore, limit support portions are provided at intervals along the circumferential and axial directions on the outer periphery of the shaft cylinder.

[0016] Furthermore, within a section perpendicular to the central axis of the shaft cylinder, the projections of the limiting supports are evenly spaced circumferentially; and / or, at least some of the limiting supports are located at different axial positions of the shaft cylinder.

[0017] Furthermore, the inner surface of the inner wall has an anti-rotation plane.

[0018] According to another aspect of the present invention, an electric motor is provided, including the above-described shock-absorbing assembly. The electric motor further includes a rotating shaft, and the shock-absorbing assembly is sleeved on the rotating shaft and forms an anti-rotation fit with the rotating shaft.

[0019] According to another aspect of the present invention, a fan is provided, including a fan blade and the aforementioned motor, wherein the fan blade is sleeved outside a shock-absorbing assembly and is supported and circumferentially limited by a limiting support portion.

[0020] Furthermore, the fan blade includes a mounting section, the inner circumference of which is provided with a limiting groove, and the limiting support section is installed in the limiting groove.

[0021] Furthermore, the limiting groove is filled with liquid damping material.

[0022] Furthermore, there is an annular filling cavity between the outer wall and the mounting part, and the annular filling cavity is filled with liquid damping material.

[0023] Furthermore, a limiting step is provided on the rotating shaft, and a retaining ring and a flat washer are provided between the bottom pad and the limiting step. A shock-absorbing pad is also provided on the rotating shaft. The shock-absorbing pad is located at the end of the support sleeve away from the limiting step and cooperates with the bottom pad to form an axial limit on the installation part.

[0024] Furthermore, the shaft has an external thread at one end extending from the shock-absorbing component, and a locking nut is connected to the external thread. A flat washer and an elastic washer are provided between the locking nut and the shock-absorbing pad. The flat washer cooperates with the shock-absorbing pad, and the elastic washer is located between the locking nut and the flat washer.

[0025] Applying the technical solution of this invention, a rigid support sleeve is placed inside an elastic gasket. The shaft cylinder is tightly connected to the inner and outer walls of the elastic gasket, forming a stable skeleton that ensures the overall structure of the assembly will not twist or deform due to external vibration. A limiting support is fixed to the outer circumference of the shaft cylinder, penetrating the outer wall and extending outwards. This provides support and limitation for the fan blade mounting portion, thereby restricting the fan blade displacement during motor shaft rotation, especially the relative displacement along the circumferential direction, ensuring the stability and efficiency of torque transmission. The elastic properties of the elastic gasket buffer the vibration transmitted from the motor shaft, reducing direct impact on the fan blade. The presence of the limiting support allows the damping assembly to effectively control the circumferential displacement of the fan blade even in high-vibration environments, ensuring its concentricity with the shaft. This significantly reduces the vibration and noise of the fan blade itself, improving the reliability and service life of the overall assembly. The combination of the support sleeve and the elastic sleeve can integrate the functions of elastic support and limiting. It can utilize the complementary advantages of rigidity and elasticity to achieve multi-level filtering and suppression of vibration, ensuring the smooth operation of the motor. This effectively solves the problems of obvious vibration transmission, poor shock absorption effect and insufficient assembly stability caused by the rigid connection between the existing fan blade and the motor shaft. Attached Figure Description

[0026] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0027] Figure 1 A three-dimensional structural schematic diagram of a shock-absorbing component according to an embodiment of the present invention is shown;

[0028] Figure 2 A cross-sectional view of a shock-absorbing assembly according to an embodiment of the present invention is shown.

[0029] Figure 3 A three-dimensional structural schematic diagram of the support sleeve of a shock-absorbing assembly according to an embodiment of the present invention is shown;

[0030] Figure 4 A schematic diagram of the support sleeve of a shock-absorbing assembly according to an embodiment of the present invention is shown;

[0031] Figure 5 A three-dimensional structural schematic diagram of the motor shaft according to an embodiment of the present invention is shown;

[0032] Figure 6 A perspective structural schematic diagram of the mounting portion of the fan blade according to an embodiment of the present invention is shown;

[0033] Figure 7 A schematic diagram of the mounting portion of the wind turbine blade according to an embodiment of the present invention is shown;

[0034] Figure 8 A schematic diagram of the assembly structure of the fan blade and the shock absorption assembly according to an embodiment of the present invention is shown;

[0035] Figure 9 A schematic diagram of the assembly structure of the fan blade and the shock absorption assembly according to an embodiment of the present invention is shown;

[0036] Figure 10 A schematic diagram of the assembly structure of a wind turbine blade according to an embodiment of the present invention is shown.

[0037] The above figures include the following reference numerals:

[0038] 1. Elastic sleeve; 2. Bottom pad; 3. Inner wall; 4. Outer wall; 5. Mounting shaft hole; 6. Support sleeve; 7. Shaft cylinder; 8. Limiting support part; 9. Hollow hole; 10. Support column; 11. Limiting protrusion; 12. Anti-rotation plane; 13. Rotating shaft; 14. Mounting part; 15. Limiting groove; 16. Liquid damping material; 17. Annular filling cavity; 18. Limiting step; 19. Snap ring; 20. Flat washer; 21. Shock-absorbing pad; 22. External thread; 23. Locking nut; 24. Elastic washer. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] See also Figures 1 to 10As shown, according to an embodiment of the present invention, the shock-absorbing assembly includes: an elastic sleeve 1, comprising a base 2, an inner wall 3, and an outer wall 4. The base 2 has an annular structure. The inner wall 3 is connected to the inner circumferential side of the base 2 and extends along the axial direction of the base 2. An mounting shaft hole 5 is formed on the inner circumferential side of the inner wall 3. The outer wall 4 is disposed on the circumferential outer side of the inner wall 3, with one end connected to the base 2 and the other end extending along the axial direction of the base 2. An annular cavity is formed between the inner wall 3 and the outer wall 4. A support sleeve 6 is a rigid structure. The support sleeve 6 includes a shaft cylinder 7 and a limiting support portion 8 fixedly disposed on the outer circumference of the shaft cylinder 7. The shaft cylinder 7 is located in the annular cavity and is fixedly connected to the inner wall 3 and the outer wall 4. The limiting support portion 8 passes through the outer wall 4 and extends out from the outer wall 4.

[0041] In this embodiment, the elastic sleeve 1 serves as the basic structure, consisting of a bottom pad 2, an inner wall 3, and an outer wall 4. The bottom pad 2 provides the mounting base, facilitating the installation design of the inner wall 3 and the outer wall 4, and providing an axial positioning reference for the inner wall 3 and the outer wall 4. The annular cavity structure between the inner wall 3 and the outer wall 4 facilitates the installation and fixation of the rigid support sleeve 6, enabling the elastic sleeve 1 and the support sleeve 6 to form a fixed and tightly fitted structure. This structure utilizes the elasticity of the elastic sleeve 1 to provide effective buffering, while the rigidity of the support sleeve 6 facilitates torque transmission, ensuring the stability and reliability of torque transmission. The mounting shaft hole 5 formed in the inner wall 3 facilitates the smooth insertion of the motor shaft, achieving a flexible connection between the elastic sleeve 1 and the motor shaft, as well as the rigid torque transmission function.

[0042] A rigid support sleeve 6 is placed inside the elastic sleeve 1. The shaft cylinder 7 is tightly connected to the inner wall 3 and outer wall 4 of the elastic sleeve, forming a stable skeleton to ensure that the overall structure of the component will not be twisted or deformed due to external vibration. The limiting support part 8 is fixed to the outer periphery of the shaft cylinder 7. The limiting support part 8 penetrates the outer wall 4 and extends from the outer wall 4, which can support and limit the installation part of the fan blade, thereby limiting the displacement of the fan blade when the motor shaft rotates, especially the relative displacement along the circumferential direction, ensuring the stability and efficiency of torque transmission.

[0043] When the motor starts and rotates at high speed, it inevitably vibrates to a certain extent. At this time, the elastic properties of the elastic sleeve 1 buffer the vibration transmitted from the motor shaft, reducing the direct impact on the fan blades. The presence of the limiting support 8 allows the damping assembly to effectively control the circumferential displacement of the fan blades even in high-vibration environments, ensuring their concentricity with the shaft. This significantly reduces the vibration and noise of the fan blades themselves, improving the overall assembly reliability and service life. Furthermore, the combination of the support sleeve 6 and the elastic sleeve 1 integrates elastic support and limiting functions. Utilizing the complementary advantages of rigidity and elasticity, it achieves multi-level filtering and suppression of vibration, ensuring the smooth operation of the motor. This effectively solves the problems of significant vibration transmission, poor damping effect, and insufficient assembly stability caused by the rigid connection between the existing fan blades and the motor shaft.

[0044] In one embodiment, the shaft 7 and the limiting support 8 are integrally formed.

[0045] The integrated design of the shaft sleeve 7 and the limiting support part 8 enhances the overall stability and assembly precision of the vibration damping assembly, avoiding the loosening and misalignment problems that may occur with separate assembly. This ensures that the vibration damping assembly can maintain accurate positioning and sufficient strength when bearing the weight of the fan blades and the vibrations generated by the motor operation, effectively preventing the fan blades from swaying and slipping during high-speed rotation, and improving the reliability and service life of the overall assembly. At the same time, the integrated molding process simplifies the manufacturing process, reduces assembly difficulty, and helps to improve production efficiency and product quality consistency.

[0046] In one embodiment, the support sleeve 6 and the elastic sleeve 1 are integrally injection molded.

[0047] The support sleeve 6 and the elastic sleeve 1 are tightly integrated through a one-piece injection molding process, ensuring the structural integrity and functional coordination of the shock absorption assembly. The rigid structure of the support sleeve 6 provides the necessary support strength and stability for the shock absorption assembly, while the elastic structure of the elastic sleeve 1 effectively absorbs and buffers the vibrations generated by the fan blades during operation. The application of one-piece injection molding technology not only simplifies the production and assembly process but also enhances the bonding force between components, avoiding separation or loosening problems caused by long-term use or vibration, thereby improving the overall assembly quality and durability.

[0048] In one embodiment, when the support sleeve 6 and the elastic sleeve 1 are integrally injection molded, after the support sleeve 6 is prepared, it is placed in the molding core, and then the material of the molding elastic sleeve 1 is injected into the molding core, so that the support sleeve 6 is embedded in the elastic sleeve 1 and is integrally formed with the elastic sleeve 1, thereby further improving the bonding and structural stability between the two.

[0049] In one embodiment, the elastic sleeve 1 is injection molded from elastic rubber material, and the support sleeve 6 is a rigid plastic part.

[0050] In some embodiments, the elastic sleeve 1 may also be injection molded from other materials with elastic properties, and the support sleeve 6 may also be made from other rigid materials such as metal.

[0051] In one embodiment, the shaft cylinder 7 and the limiting support part 8 are detachably connected, and the shaft cylinder 7 and the elastic sleeve 1 are integrally injection molded.

[0052] In this embodiment, the shaft cylinder 7 and the limiting support part 8 are detachably connected, making the limiting support part 8 easy to maintain and adjust, ensuring the stability and safety of the fan blade during use. The shaft cylinder 7 and the elastic sleeve 1 are tightly integrated through integral injection molding. This integrated design not only simplifies the assembly process but also enhances the connection strength and vibration damping effect between the fan blade and the motor shaft. By separating the limiting support part 8 from the shaft cylinder 7, worn parts can be replaced independently, extending the service life of the entire vibration damping fan blade assembly structure. The integral molding of the elastic sleeve 1 and the shaft cylinder 7 forms an elastic composite structure that can effectively absorb and disperse vibrations generated by motor operation, reducing noise and improving equipment operating efficiency. Through optimized connection methods and integrated design, this embodiment enables the vibration damping component to possess high performance, high reliability, and ease of management, making it more convenient and effective to achieve motor vibration damping.

[0053] In one embodiment, the limiting support part 8 is detachably connected to the shaft cylinder 7 through a snap-fit ​​or threaded connection. During the assembly process of the support sleeve 6 and the elastic sleeve 1, the shaft cylinder 7 of the support sleeve 6 is first put into the elastic sleeve 1. The outer wall of the elastic sleeve 1 is provided with a clearance position that is aligned with the corresponding hole of the shaft cylinder 7. Then, the limiting support part 8 is installed into the corresponding hole of the shaft cylinder 7 from the outside, so as to realize the assembly and fixation between the limiting support part 8 and the shaft cylinder 7.

[0054] In one embodiment, the shaft cylinder 7 has a hollow hole 9 that radially penetrates the cylinder wall of the shaft cylinder 7.

[0055] The hollow holes 9 on the shaft cylinder 7 penetrate radially through the cylinder wall of the shaft cylinder 7, allowing the rubber material to penetrate and pass through these hollow holes 9 during the injection molding process of the support sleeve 6 and the elastic sleeve 1, forming a physical lock with the shaft cylinder 7. This greatly enhances the bonding force between the rubber parts and the support sleeve 6, improves the structural strength and durability of the overall shock absorption assembly, and at the same time, the design of the hollow holes 9 also reduces the weight of the support sleeve 6 and optimizes its mechanical properties, ensuring that the shock absorption assembly can maintain a stable working state when subjected to high-frequency vibration and impact during motor operation, effectively extending the service life of the motor and the fan blades.

[0056] In one embodiment, the limiting support 8 includes a support post 10 and a limiting protrusion 11 disposed on the top of the support post 10.

[0057] The limiting support part 8 consists of a support column 10 and a limiting protrusion 11 at its top, providing both precise positioning and effective limiting for the fan blade installation. Specifically, the support column 10 is anchored between the fan blade and the vibration damping assembly, providing stable radial support for the fan blade. The limiting protrusion 11 at its top can be precisely embedded in the limiting groove 15 of the fan blade shaft hole. This geometric matching not only ensures the fan blade's firm positioning in the circumferential direction, preventing the fan blade from shifting or wobbling during high-speed rotation, but also, through the elastic contact between the limiting protrusion 11 and the limiting groove 15, further absorbs minor vibrations, significantly improving the smoothness and quietness of the fan blade operation. Ultimately, this achieves significant optimization of the motor drive system in terms of vibration damping and noise reduction, increasing the overall reliability of the system and the user experience. Through the structural design of the limiting support part 8, the stability of the fan blade is enhanced, and the limiting protrusion 11 at its top improves the efficiency of vibration damping and noise reduction.

[0058] In one embodiment, the top of the limiting protrusion 11 is a spherical structure, and the projected area of ​​the limiting protrusion 11 on the cross-section of the support column 10 is greater than the cross-sectional area of ​​the support column 10.

[0059] In this embodiment, the top of the limiting protrusion 11 adopts a spherical structure, and the projected area of ​​the limiting protrusion 11 on the cross-section of the support column 10 is larger than the cross-sectional area of ​​the support column 10. This makes the connection between the fan blade and the motor shaft more stable. The spherical limiting protrusion 11 can achieve point contact in the limiting groove 15 on the inner wall of the fan blade shaft hole, which can minimize the vibration transmission caused by hard contact and achieve a good vibration reduction and noise reduction effect. At the same time, the rigid structure of the limiting support part 8 formed by the support column 10 and the limiting protrusion 11 can be used to effectively prevent the fan blade from circumferentially displacing relative to the shaft in a high vibration environment, ensuring the precise positioning of the fan blade and the stability of long-term operation. The large ratio of the projected area of ​​the limiting protrusion 11 to the cross-sectional area of ​​the support column 10 can effectively limit the outer wall 4 of the elastic sleeve 1, preventing the outer wall 4 from detaching from the support column 10 and ensuring the stability and reliability of the connection structure between the elastic sleeve 1 and the support sleeve 6.

[0060] In one embodiment, the outer periphery of the cylinder 7 is provided with limiting support portions 8 at intervals along the circumferential and axial directions, respectively.

[0061] The limiting support parts 8, spaced circumferentially and axially along the outer periphery of the shaft cylinder 7, achieve balanced support and precise positioning of the fan blade in three-dimensional space. This not only ensures accurate positioning of the fan blade center and reduces additional vibration caused by assembly deviations, but also effectively disperses stress concentration at hard contact points by staggering the limiting support parts 8 on different circumferential surfaces, avoiding excessive local wear and promoting uniform dissipation of vibration energy. When liquid damping material 16 is filled between the outer wall 4 and the mounting part 14, the above structure allows the liquid damping material 16 to form an asymmetrical distribution between the fan blade and the vibration damping assembly, maximizing the coverage and effectiveness of the liquid damping material 16, significantly enhancing the vibration damping capability of the entire system. This ensures stable and efficient operation of the motor and fan blade while significantly reducing operating noise, improving user experience and product performance.

[0062] In one embodiment, within a cross-section perpendicular to the central axis of the cylinder 7, the projections of the limiting support portions 8 are evenly spaced along the circumference.

[0063] Within a cross-section perpendicular to the central axis of the shaft cylinder 7, the projections of the limiting support parts 8 are evenly spaced circumferentially, ensuring that the fan blades receive balanced and continuous support in the circumferential direction. This evenly distributed support structure effectively prevents the fan blades from becoming eccentric during high-speed rotation, reducing the resulting vibration and noise. At the same time, this layout also helps to make the power transmission between the fan blades and the motor shaft smoother, reducing wear caused by local stress concentration, enhancing the overall stability and durability of the components, significantly improving the comprehensive performance of the vibration reduction system, and ensuring that the motor-driven fan blades maintain optimal dynamic balance and quiet operation under various working conditions.

[0064] In one embodiment, at least part of the limiting support 8 is located at different axial positions of the shaft cylinder 7.

[0065] At least some of the limiting support parts 8 are located at different axial positions on the shaft cylinder 7. This allows the limiting support parts 8 at different axial positions to make multi-point contact with the inner wall of the fan blade shaft hole, ensuring not only the axial and radial stability of the fan blade and avoiding the skew or swaying that might occur with support in a single plane, but also, because the support points are distributed at different heights on the shaft cylinder, helping to establish a continuous support network throughout the entire circumference of the fan blade. This effectively disperses the vibration energy generated during motor operation, reduces the peak effect of vibration transmission, and improves the overall system's vibration damping performance. Simultaneously, the multi-point support design also helps to evenly distribute the load on the fan blade, reduce excessive stress in specific areas, extend the service life of the fan blade and vibration damping components, and ensure the long-term reliability and stability of the motor drive system.

[0066] In one embodiment, the inner surface of the inner wall 3 has an anti-rotation plane 12.

[0067] In this embodiment, the inner surface of the inner wall 3 is provided with an anti-rotation plane 12, which provides additional positioning and anti-rotation functions for the engagement between the shock-absorbing assembly and the motor shaft, thereby enhancing the connection stability between the fan blade and the motor shaft. The anti-rotation plane 12 of the shock-absorbing assembly cooperates with the limiting support part 8, which not only restricts the free rotation of the fan blade in the circumferential direction, but also ensures the precise alignment of the fan blade and the shaft, thereby effectively reducing vibration and noise caused by fan blade eccentricity.

[0068] See also Figures 1 to 10 As shown, according to an embodiment of the present invention, the motor includes the above-mentioned shock-absorbing component, and the motor also includes a rotating shaft 13. The shock-absorbing component is sleeved on the rotating shaft 13 and forms an anti-rotation fit with the rotating shaft 13.

[0069] The motor includes the aforementioned vibration damping assembly and a rotating shaft 13. The vibration damping assembly is fitted around the rotating shaft 13 and forms an anti-rotation fit with it. During operation, the vibration damping assembly effectively absorbs and dissipates the vibration energy transmitted by the rotating shaft 13, significantly reducing the overall vibration level and noise of the motor. Furthermore, the anti-rotation fit design between the vibration damping assembly and the rotating shaft 13 ensures the stability of the fan blades during high-speed operation, preventing blade misalignment or damage due to vibration, thereby extending the motor's service life and improving its performance and reliability.

[0070] See also Figures 1 to 10 As shown, according to an embodiment of the present invention, the fan includes a fan blade and the aforementioned motor. The fan blade is sleeved outside the shock absorption assembly and is supported and circumferentially limited by the limiting support portion 8.

[0071] By adopting the above structure, the fan achieves better vibration reduction and assembly stability. Specifically, the tight fit between the elastic sleeve 1 and the support sleeve 6 in the vibration damping assembly not only provides the radial support required by the fan blades, but also effectively prevents circumferential movement and skewness of the fan blades during high-speed rotation through the accurate fit between the limiting support part 8 and the inner wall of the fan blade shaft hole, thereby avoiding additional vibration and noise caused by fan blade eccentricity.

[0072] In one embodiment, the fan blade includes a mounting portion 14, and a limiting groove 15 is provided on the inner periphery of the mounting portion 14, with a limiting support portion 8 installed in the limiting groove 15.

[0073] In this embodiment, a limiting groove 15 is provided on the inner circumference of the mounting portion 14 of the fan blade, which matches the limiting support portion 8 of the vibration damping assembly. The limiting support portion 8 is installed in the limiting groove 15, ensuring circumferential limiting of the fan blade during assembly, effectively preventing eccentricity and slippage of the fan blade during operation, and improving the accuracy and stability of assembly. Through the precise cooperation between the limiting support portion 8 and the limiting groove 15, the vibration damping assembly can not only provide elastic support in the radial direction, but also limit the displacement of the fan blade in the circumferential direction, further enhancing the torque transmission and vibration damping effect of the overall structure.

[0074] In one embodiment, the diameter of the circle containing the bottom of the limiting groove 15 is D1, and the diameter of the circle containing the top of the spherical surface of the limiting protrusion 11 of the limiting support part 8 is D, where D=D1. This ensures that the top of the spherical surface of the limiting protrusion 11 abuts against the bottom of the limiting groove 15, thereby circumferentially limiting the mounting part 14 of the fan blade and ensuring the coaxiality of the fan blade and the rotating shaft 13 of the motor.

[0075] In one embodiment, the limiting groove 15 is filled with liquid damping material 16.

[0076] In this embodiment, the limiting groove 15 is filled with liquid damping material 16, which significantly enhances the vibration absorption capacity and noise reduction effect of the vibration damping fan assembly structure. When the motor vibrates during operation, the liquid damping material 16, as a filling medium, plays a role in energy conversion and consumption within the limiting groove 15. Through its viscosity and internal friction characteristics, it converts mechanical vibration into heat energy, effectively reducing the vibration transmission between the fan blade and the motor shaft and reducing the resonance phenomenon of the system. At the same time, the fluidity of the liquid damping material 16 allows it to fill the tiny gaps in the limiting groove, forming a complete damping layer, which further improves the sealing and vibration isolation performance of the vibration damping component. Even under high speed or high intensity vibration conditions, it can maintain a stable vibration damping effect, significantly improving the noise control level and user experience of the product.

[0077] In one embodiment, an annular filling cavity 17 is provided between the outer wall 4 and the mounting portion 14, and the annular filling cavity 17 is filled with liquid damping material 16.

[0078] In this embodiment, the annular filling cavity 17 formed between the outer wall 4 and the mounting part 14 is filled with liquid damping material 16. This design effectively increases the damping effect of the connection part by utilizing the viscoelastic properties of the liquid damping material 16 after curing. This allows the vibration energy generated during motor operation to be absorbed and dispersed by the liquid damping material 16 in the annular filling cavity 17, thereby significantly reducing vibration and noise during transmission. Compared with solid damping materials, the liquid damping material 16 can more evenly cover the entire annular filling cavity 17 during filling, forming a damping layer without bubbles or dead corners, ensuring the consistency and reliability of the shock absorption effect. In addition, after curing, the liquid damping material 16 is tightly bonded to the elastic sleeve 1 and the fan blade mounting part 14, enhancing the sealing and stability of the entire assembly structure, avoiding loosening and leakage problems caused by vibration, and improving the overall performance of the assembly.

[0079] In one embodiment, the liquid damping material 16 may be a suitable flowable polymer solution or gel, which can be solidified after injection to fill gaps and achieve vibration reduction without dead angles.

[0080] In one embodiment, a limiting step 18 is provided on the rotating shaft 13, and a retaining ring 19 and a flat washer 20 are provided between the bottom pad 2 and the limiting step 18. A shock-absorbing pad 21 is also provided on the rotating shaft 13. The shock-absorbing pad 21 is provided at the end of the support sleeve 6 away from the limiting step 18, and cooperates with the bottom pad 2 to form an axial limit on the mounting part 14.

[0081] In this embodiment, a limiting step 18 is provided on the rotating shaft 13. The limiting step 18 and the base pad 2 form a stable structure through a retaining ring 19 and a flat washer 20. A shock-absorbing pad 21 is installed at the other end of the rotating shaft 13. The shock-absorbing pad 21 is located on the side of the support sleeve 6 away from the limiting step 18 and works together with the base pad 2 to axially limit the mounting part 14. This design ensures the accurate axial positioning of the mounting part 14. The cooperation of the base pad 2, retaining ring 19, flat washer 20, and shock-absorbing pad 21 with the support sleeve 6 improves the positioning accuracy during assembly. At the same time, the setting of the shock-absorbing pad 21 further enhances the axial stability of the mounting part 14, effectively absorbs axial vibration, avoids connection loosening and noise problems caused by axial displacement, and improves the reliability and service life of the overall assembly structure.

[0082] In one embodiment, the shaft 13 has an external thread 22 at one end extending from the shock-absorbing component. A locking nut 23 is connected to the external thread 22. A flat washer 20 and an elastic washer 24 are provided between the locking nut 23 and the shock-absorbing pad 21. The flat washer 20 cooperates with the shock-absorbing pad 21, and the elastic washer 24 is located between the locking nut 23 and the flat washer 20.

[0083] In this embodiment, the end of the rotating shaft 13 is provided with an external thread 22, which is used to connect with the locking nut 23 to fix the relative position of the fan blade and the motor shaft. A flat washer 20 and an elastic washer 24 are sequentially arranged between the locking nut 23 and the damping washer 21. The flat washer 20 cooperates with the damping washer 21 to provide a flat support surface and reduce stress concentration during the tightening process; while the elastic washer 24 is located between the locking nut 23 and the flat washer 20, its function is to provide a preload when tightening the nut, ensuring that the fan blade is stable and does not loosen at high speeds, while absorbing the axial force generated by vibration, further improving the overall vibration damping effect. This structural design, by introducing damping materials and elastic elements into the traditional fixing method, can effectively reduce the vibration transmission at the connection between the fan blade and the motor shaft, reducing noise and extending the service life of the motor.

[0084] In the embodiments of this application, the assembly process of the fan is as follows: First, the elastic sleeve 1 of the damping component is fitted onto the rotating shaft 13 of the motor, wherein the inner wall 3 of the elastic sleeve 1 forms soft contact with the rotating shaft 13, while the outer wall 4 leaves a certain gap with the inner wall of the fan blade shaft hole. Subsequently, the fan blade mounting part 14 is installed outside the damping component, and the limiting groove 15 of the inner wall of the shaft hole of the mounting part 14 is precisely aligned with the limiting protrusion 11 of the limiting support part 8 on the support sleeve 6 to achieve circumferential limiting of the fan blade. Next, liquid damping material 16 is injected into the gap between the shaft hole of the mounting part 14 and the outer wall 4 of the damping component. After the liquid damping material 16 solidifies, it forms a stable damping layer, further absorbing and dissipating vibration energy. Finally, a damping pad 21 is installed at the end of the shaft cylinder 7 away from the limiting step 18, and the mounting part 14 of the fan blade is firmly fixed to the motor shaft 13 by the locking nut 23. A flat washer 20 and an elastic washer 24 are placed between the damping pad 21 and the locking nut 23 to improve the connection stability of the fan blade and reduce the axial vibration of the fan blade. Throughout the assembly process, the components achieve precise fit and seamless connection, ensuring the stable operation of the fan blade under the drive of the motor, effectively reducing vibration and noise, and improving the performance of the motor drive system and the user experience.

[0085] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0086] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0087] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A shock absorbing assembly characterized by, The utility model relates to a damping assembly for motor, comprising: An elastic sleeve pad (1) comprises a bottom pad (2), an inner wall (3) and an outer wall (4), the bottom pad (2) is annular structure, the inner wall (3) is connected on the inner circumferential side of the bottom pad (2) and extends along the axial direction of the bottom pad (2), the inner circumferential side of the inner wall (3) forms a mounting shaft hole (5), the outer wall (4) is arranged on the circumferential outer side of the inner wall (3), one end is connected on the bottom pad (2), and the other end extends along the axial direction of the bottom pad (2), and the annular cavity is formed between the inner wall (3) and the outer wall (4); A support sleeve (6) is rigid structure, the support sleeve (6) comprises a shaft cylinder (7) and a limiting support part (8) fixedly arranged on the outer periphery of the shaft cylinder (7), the shaft cylinder (7) is located in the annular cavity and is fixedly connected with the inner wall (3) and the outer wall (4), and the limiting support part (8) is arranged in the outer wall (4) and extends out from the outer wall (4).

2. The shock absorbing assembly of claim 1, wherein, The shaft cylinder (7) is integrally formed with the limiting support part (8).

3. The shock absorbing assembly of claim 2, wherein, The support sleeve (6) is integrally injection molded with the elastic sleeve pad (1).

4. The shock absorbing assembly of claim 1, wherein, The shaft cylinder (7) is detachably connected with the limiting support part (8), and the shaft cylinder (7) is integrally injection molded with the elastic sleeve pad (1).

5. The shock absorbing assembly of any one of claims 1 to 4, wherein, The shaft cylinder (7) is provided with a hollow hole (9), and the hollow hole (9) penetrates the cylinder wall of the shaft cylinder (7) in the radial direction.

6. The shock absorbing assembly of any one of claims 1 to 4, wherein, The limiting support part (8) comprises a support column (10) and a limiting convex part (11) arranged on the top of the support column (10).

7. The shock absorbing assembly of claim 6, wherein, The top of the limiting convex part (11) is a spherical surface structure, and the projection area of the limiting convex part (11) on the cross section of the support column (10) is greater than the cross-sectional area of the support column (10).

8. The shock absorbing assembly of any one of claims 1 to 4, wherein, The outer periphery of the shaft cylinder (7) is respectively provided with the limiting support part (8) in the circumferential direction and the axial direction.

9. The shock absorbing assembly of claim 8, wherein, In the cross section perpendicular to the central axis of the shaft cylinder (7), the projections of the limiting support parts (8) are uniformly and spacedly arranged in the circumferential direction, and / or at least part of the limiting support parts (8) are located at different axial positions of the shaft cylinder (7).

10. The shock absorbing assembly of any one of claims 1 to 4, wherein, The inner surface of the inner wall (3) has an anti-rotation flat surface (12).

11. An electric machine characterized by The motor further comprises a rotating shaft (13), and the damping assembly is sleeved outside the rotating shaft (13) and forms an anti-rotation fit with the rotating shaft (13).

12. A fan, characterized by The motor comprises a fan blade and the motor of claim 11, and the fan blade is sleeved outside the damping assembly and is supported and circumferentially limited by the limiting support part (8).

13. The fan of claim 12, wherein, The fan blade comprises a mounting part (14), and the inner periphery of the mounting part (14) is provided with a limiting groove (15), and the limiting support part (8) is mounted in the limiting groove (15).

14. The fan of claim 13, wherein, The limiting groove (15) is filled with a liquid damping material (16).

15. The fan of claim 13, wherein, The outer wall (4) and the mounting part (14) have an annular filling cavity (17) therebetween, and the annular filling cavity (17) is filled with a liquid damping material (16).

16. The fan of claim 13, wherein, The rotating shaft (13) is provided with a limiting step (18), a snap ring (19) and a flat washer (20) are arranged between the bottom pad (2) and the limiting step (18), and a damping washer (21) is further arranged on the rotating shaft (13), the damping washer (21) is arranged at one end of the supporting sleeve (6) away from the limiting step (18) and cooperates with the bottom pad (2) to axially limit the mounting portion (14).

17. The fan of claim 16, wherein, The rotating shaft (13) is provided with an external thread (22) at one end of the damping assembly, a locking nut (23) is connected to the external thread (22), a flat washer (20) and an elastic washer (24) are arranged between the locking nut (23) and the damping washer (21), the flat washer (20) cooperates with the damping washer (21), and the elastic washer (24) is located between the locking nut (23) and the flat washer (20).

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