Noise reduction device for electric drive assembly, electric drive assembly component and vehicle

Abstract

The invention discloses a noise reduction device for an electric drive assembly, an electric drive assembly component and a vehicle, and relates to the technical field of noise reduction, the electric drive assembly comprises an electric drive assembly shell, the electric drive assembly shell is provided with a controller shell, the controller shell comprises a shell main body and an end cover, the shell main body and the end cover are arranged in the first direction, and the shell main body and the end cover are arranged in the first direction. The end cover is provided with a cover end wall, the noise reduction device comprises a plurality of noise reduction bodies, the noise reduction bodies are arranged in the first direction, any two adjacent noise reduction bodies are connected so that the noise reduction bodies can jointly define an installation space, the installation space is used for installing an electric drive assembly, and one of the noise reduction bodies is used for covering the cover end wall. The controller can be completely covered by the noise reduction device, so that the NVH noise of the electric drive assembly is greatly reduced, and the requirement of a user for quiet comfort of the whole vehicle is met.

Description

Technical Field

[0001] The present invention relates to the technical field of noise reduction, and in particular to a noise reduction device for an electric drive assembly, an electric drive assembly component and a vehicle. Background Art

[0002] In the related technologies, with the development of new energy vehicle technology, the core component of new energy vehicles, the electric drive assembly, is developing towards an integrated, high-power density and lightweight assembly structure. The requirements for miniaturization and lightweight of the electric drive assembly cause the noise structure transmission of the electric drive body to be more obvious. The integration of the electric drive assembly is getting higher and higher, and there are more and more components or parts with superimposed resonance, resulting in more and more complex NVH noise changes. Therefore, it is necessary to set a noise reduction device to reduce the noise of the electric drive assembly. However, after the existing noise reduction device is assembled with the electric drive assembly, the cover end wall of the controller is partially exposed at the assembly gap of the noise reduction device, resulting in serious noise leakage at the cover end wall of the controller's end cover, which cannot meet the user's requirements for the quietness and comfort of the vehicle. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a noise reduction device that can achieve complete coverage of the controller by the noise reduction device, thereby greatly reducing the NVH noise of the electric drive assembly to meet the user's requirements for the quietness and comfort of the entire vehicle.

[0004] The present invention further proposes an electric drive assembly having the above-mentioned noise reduction device.

[0005] The present invention further provides a vehicle having the electric drive assembly.

[0006] According to an embodiment of the present invention, a noise reduction device for an electric drive assembly comprises an electric drive assembly shell, the electric drive assembly shell has a controller shell, the controller shell comprises a shell body and an end cover, the shell body and the end cover are arranged along a first direction, and along the first direction, the end cover has a cover end wall, the noise reduction device comprises: a plurality of noise reduction bodies, the plurality of noise reduction bodies are arranged along the first direction, and any two adjacent noise reduction bodies are connected so that the plurality of noise reduction bodies jointly define an installation space, the installation space is used to install the electric drive assembly, and one of the plurality of noise reduction bodies is used to cover the cover end wall.

[0007] According to the noise reduction device for an electric drive assembly according to an embodiment of the present invention, by installing the electric drive assembly in an installation space jointly defined by multiple noise reduction bodies, and one of the multiple noise reduction bodies is used to cover the cover end wall, the noise reduction device can achieve complete coverage of the controller, thereby greatly reducing the NVH noise of the electric drive assembly to meet the user's requirements for the quietness and comfort of the entire vehicle.

[0008] According to some embodiments of the present invention, the plurality of noise reduction bodies include: a first noise reduction body and a second noise reduction body, the first noise reduction body and the second noise reduction body jointly define an installation space, and the first noise reduction body is used to install a controller housing so that the cover end wall is located inside the first noise reduction body.

[0009] According to some embodiments of the present invention, the first noise reduction body includes: a first sound insulation shell and a first sound absorbing structure, at least part of the inner surface of the first sound insulation shell is provided with the first sound absorbing structure, and the first sound absorbing structure is suitable for corresponding to the cover end wall.

[0010] According to some embodiments of the present invention, the first sound absorbing structure includes: a first sound absorbing layer and / or a shock absorbing layer.

[0011] According to some embodiments of the present invention, the shock absorbing layer is located on a side of the first sound absorbing layer facing away from the first sound insulation shell.

[0012] According to some embodiments of the present invention, the shock absorbing layer is disposed in the first sound absorbing layer.

[0013] According to some embodiments of the present invention, a boss structure is formed on the surface of the shock-absorbing layer.

[0014] According to some embodiments of the present invention, the second noise reduction body includes: a second sound insulation shell and a second sound absorbing structure, at least part of the inner surface of the second sound insulation shell is provided with the second sound absorbing structure, the end of the first noise reduction body facing the second noise reduction body is open, and the end of the second noise reduction body facing the first noise reduction body is open, along the first direction, the end of the first sound absorbing structure facing the second noise reduction body is located on the inner side of the end of the first noise reduction body facing the second noise reduction body, the second sound absorbing structure extends out of the second noise reduction body from the end facing the first noise reduction body, and the second sound absorbing structure extends into the first noise reduction body and abuts against the inner surface of the first sound insulation shell.

[0015] According to some embodiments of the present invention, an end portion of the first sound absorbing structure facing the second noise reduction body abuts against an end portion of the second sound absorbing structure facing the first noise reduction body.

[0016] According to some embodiments of the present invention, an end portion of the first sound insulation shell facing the second noise reduction body abuts against an end portion of the second sound insulation shell facing the first noise reduction body.

[0017] According to some embodiments of the present invention, one of the plurality of noise reduction bodies surrounds abutment between the shell body and the end cover to cover the abutment between the shell body and the end cover.

[0018] According to some embodiments of the present invention, the first sound insulation shell has an annular shell wall arranged around the joint between the shell body and the end cover, the annular shell wall includes a shell wall body and a flip cover, the shell wall body is formed with an assembly notch, and the flip cover can be movably arranged on the shell wall body to open or close the assembly notch.

[0019] According to some embodiments of the present invention, the first sound absorbing structure includes: a first sub-sound absorbing structure and a second sub-sound absorbing structure, the first sub-sound absorbing structure is arranged on the inner surface of the shell wall body, and the second sub-sound absorbing structure is arranged on the inner surface of the flip cover, along the circumference of the annular shell wall, the first sub-sound absorbing structure extends out of the end of the shell wall body, and the end of the second sub-sound absorbing structure is located on the inner side of the end of the flip cover, and when the flip cover closes the assembly notch, the first sub-sound absorbing structure is located on the inner side of the flip cover and abuts against the inner surface of the flip cover.

[0020] According to some embodiments of the present invention, at least one noise reduction body includes: a sound insulation shell and a sound absorbing structure, at least part of the inner surface of the sound insulation shell is provided with the sound absorbing structure, the sound insulation shell is formed with a first assembly hole, and the sound absorbing structure is formed with a second assembly hole, the first assembly hole and the second assembly hole are arranged opposite to each other, and the cross-sectional area of ​​the first assembly hole is smaller than the cross-sectional area of ​​the second assembly hole.

[0021] According to some embodiments of the present invention, each noise reduction body is suitable for abutting against a housing of the electric drive assembly.

[0022] According to an embodiment of the present invention, an electric drive assembly component includes: an electric drive assembly, the electric drive assembly includes an electric drive assembly shell, the electric drive assembly shell has a controller shell, the controller shell includes a shell body and an end cover, the shell body and the end cover are arranged along a first direction and, along the first direction, the end cover has a cover end wall, a noise reduction device, the noise reduction device is the noise reduction device of the above embodiment, the electric drive assembly is installed in the installation space, and one of the multiple noise reduction bodies is used to cover the cover end wall.

[0023] A vehicle according to an embodiment of the present invention includes the electric drive assembly of the above embodiment.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is an exploded schematic diagram of a noise reduction device according to an embodiment of the present invention;

[0027] Figure 2 is a schematic structural diagram of an electric drive assembly according to an embodiment of the present invention;

[0028] Figure 3 It is an exploded schematic diagram of an electric drive assembly, a first noise reduction body, and a second noise reduction body according to an embodiment of the present invention;

[0029] Figure 4It is a schematic diagram of the assembly of the flip cover and the shell wall body according to an embodiment of the present invention;

[0030] Figure 5 is a partial cross-sectional schematic diagram of a first noise reduction body according to a first embodiment of the present invention;

[0031] Figure 6 is a partial cross-sectional schematic diagram of a first noise reduction body according to a second embodiment of the present invention;

[0032] Figure 7 It is a partial cross-sectional schematic diagram of the first noise reduction body according to the third embodiment of the present invention.

[0033] Reference numerals:

[0034] Noise reduction device 100;

[0035] Noise reduction body 10; first noise reduction body 11;

[0036] First sound insulation shell 111; annular shell wall 1111; shell wall body 1112; flip cover 1113; assembly notch 1114;

[0037] First sound absorbing structure 112; first sound absorbing layer 1121; shock absorbing layer 1122; boss structure 1123; first sub-sound absorbing structure 1124; second sub-sound absorbing structure 1125;

[0038] A second noise reduction body 12; a second sound insulation shell 121;

[0039] A first assembly hole 13;

[0040] Installation space 20;

[0041] Velcro 30;

[0042] Electric drive assembly 200 ; electric drive assembly housing 201 ; controller housing 202 ; housing body 203 ; end cover 204 ; cover end wall 2041 . DETAILED DESCRIPTION

[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] Reference below Figure 1-Figure 7 The noise reduction device 100 for the electric drive assembly 200 , the electric drive assembly component and the vehicle according to the embodiment of the present invention are described.

[0045] like Figure 1-Figure 7As shown, according to an embodiment of the present invention, a noise reduction device 100 for an electric drive assembly 200, the electric drive assembly 200 includes an electric drive assembly shell 201, the electric drive assembly shell 201 has a controller shell 202, the controller shell 202 includes a shell body 203 and an end cover 204, the shell body 203 and the end cover 204 are arranged along a first direction, along the first direction, the end cover 204 has a cover end wall 2041, the noise reduction device 100 includes: a plurality of noise reduction bodies 10, the plurality of noise reduction bodies 10 are arranged along the first direction, and any two adjacent noise reduction bodies 10 are connected so that the plurality of noise reduction bodies 10 jointly define an installation space 20, the installation space 20 is used to install the electric drive assembly 200, and one of the plurality of noise reduction bodies 10 is used to cover the cover end wall 2041.

[0046] The electric drive assembly 200 includes an electric drive assembly housing 201, which is an external protective structure of the electric drive assembly 200. The main function is to protect the key components such as the internal motor, controller, and transmission from damage by the external environment, such as dust, moisture, vibration, and impact, and also to dissipate heat and isolate electromagnetic interference, so as to ensure that the electric drive assembly 200 can work stably and efficiently. The electric drive assembly housing 201 has a controller housing 202, and the controller housing 202 includes a housing body 203 and an end cover 204. The housing body 203 and the end cover 204 are arranged along a first direction. Along the first direction, the end cover 204 has a cover end wall 2041. By dividing the controller housing 202 into two parts, the housing body 203 and the end cover 204, the assembly process can be simplified. The abutment between the housing body 203 and the end cover 204 can form an effective heat dissipation channel, improve the heat dissipation efficiency, and help reduce the operating temperature of the controller and extend its service life.

[0047] The noise reduction device 100 includes: a plurality of noise reduction bodies 10, for example: the noise reduction device 100 may include two, three, four, etc. noise reduction bodies 10, but the present invention is not limited thereto, and the noise reduction device 100 may also include other numbers of noise reduction bodies 10, as long as the noise reduction device 100 includes a plurality of noise reduction bodies 10. This application is described by taking the noise reduction device 100 including two noise reduction bodies 10 as an example. When the electric drive assembly 200 and the noise reduction device 100 are as follows Figure 3 When placed in the position shown, Figure 3 The X direction in the figure is the first direction, and the multiple noise reduction bodies 10 are arranged along the first direction, and any two adjacent noise reduction bodies 10 are connected so that the multiple noise reduction bodies 10 jointly define an installation space 20. The installation space 20 is used to install the electric drive assembly 200, providing a relatively quiet and stable operating environment for the electric drive assembly 200. The multiple noise reduction bodies 10 can also effectively absorb, reflect and isolate the noise during the operation of the electric drive assembly 200, thereby reducing the noise level of the entire vehicle, and can also significantly improve the NVH performance of the entire vehicle, making the vehicle quieter and more stable during driving.

[0048] The cover end wall 2041 is constructed as a plane or a flat plate structure similar to a plane, so that the cover end wall 2041 can easily amplify and transmit the switching noise of the controller, the motor noise and the noise of the reducer. Therefore, the cover end wall 2041 needs to be covered. One of the multiple noise reduction bodies 10 is used to cover the cover end wall 2041, which helps to reduce noise leakage and vibration transmission at the cover end wall 2041 of the end cover 204, and can achieve complete coverage of the controller by the noise reduction device 100, so as to further absorb, reflect and isolate the noise during operation of the electric drive assembly 200, thereby reducing the noise level of the whole vehicle, and can also further improve the NVH performance of the whole vehicle, making the vehicle quieter and smoother during driving, so as to meet the user's requirements for the quietness and comfort of the whole vehicle.

[0049] Furthermore, the noise reduction device 100 can be made of materials with good sound absorption and sound insulation performance, and also have certain strength and durability. For example, PU foam, sound-absorbing cotton, EPDM (Ethylene Propylene Diene Monomer), damping composite materials and other new materials can be used to make the noise reduction device 100. In addition, the structure of the noise reduction device 100 can be reasonably optimized and designed according to the shape and size of the electric drive assembly 200 to ensure the maximum noise reduction effect, thereby significantly reducing the noise and vibration of the electric drive assembly 200 during operation, and improving the NVH performance, safety and stability of the whole vehicle.

[0050] According to the noise reduction device 100 for the electric drive assembly 200 of the embodiment of the present invention, by installing the electric drive assembly 200 in an installation space 20 defined by multiple noise reduction bodies 10, and one noise reduction body 10 among the multiple noise reduction bodies 10 is used to cover the cover end wall 2041, the noise reduction device 100 can achieve complete coverage of the controller, thereby greatly reducing the NVH noise of the electric drive assembly 200 to meet the user's requirements for the quietness and comfort of the entire vehicle.

[0051] According to some embodiments of the present invention, Figure 1 As shown, the multiple noise reduction bodies 10 include: a first noise reduction body 11 and a second noise reduction body 12. The first noise reduction body 11 and the second noise reduction body 12 jointly define an installation space 20. The first noise reduction body 11 is used to install a controller housing 202 so that the cover end wall 2041 is located in the first noise reduction body 11.

[0052] The first noise reduction body 11 and the second noise reduction body 12 jointly define an installation space 20, and the electric drive assembly 200 is installed in the installation space 20, so that the first noise reduction body 11 and the second noise reduction body 12 can effectively wrap and isolate the noise generated by the electric drive assembly 200, which can significantly reduce the propagation and leakage of noise. The first noise reduction body 11 is used to install the controller housing 202, so that the cover end wall 2041 is located in the first noise reduction body 11, which can effectively wrap and isolate the noise generated at the cover end wall 2041, and achieve complete coverage of the controller housing 202, thereby further improving the NVH noise of the electric drive assembly 200 to meet the user's requirements for the quietness and comfort of the entire vehicle.

[0053] According to some embodiments of the present invention, Figure 5 As shown, the first noise reduction body 11 includes: a first sound insulation shell 111 and a first sound absorbing structure 112 . At least part of the inner surface of the first sound insulation shell 111 is provided with the first sound absorbing structure 112 . The first sound absorbing structure 112 is suitable for corresponding to the cover end wall 2041 .

[0054] Among them, the first noise reduction body 11 includes: a first sound insulation shell 111 and a first sound absorbing structure 112. As an example of the present application, the first sound insulation shell 111 can be made of EPDM material. The EPDM material has excellent sealing and elasticity, and can effectively isolate the propagation path of noise and reduce noise leakage. The first sound insulation shell 111 made of EPDM material has a certain structural strength and can withstand certain external force impact and vibration, ensuring the stability and reliability of the first sound insulation shell 111, and can effectively extend the service life of the first sound insulation shell 111. The first sound absorbing structure 112 can be made of sound absorbing cotton material. The first sound absorbing structure 112 made of sound absorbing cotton material has excellent sound absorbing performance. The sound absorbing cotton material has a large number of microporous structures inside, which can effectively absorb sound wave energy, convert sound energy into heat energy and consume it, thereby reducing the noise level.

[0055] At least part of the inner surface of the first soundproof shell 111 is provided with a first sound absorbing structure 112. For example, the inner surface of one-half, one-third, and other proportional parts of the first soundproof shell 111 can be provided with the first sound absorbing structure 112, but the present invention is not limited thereto. The inner surface of the first soundproof shell 111 can also be provided with the first sound absorbing structure 112, as long as at least part of the inner surface of the first soundproof shell 111 is provided with the first sound absorbing structure 112. The first sound absorbing structure 112 is suitable for corresponding to the cover end wall 2041. When the first sound absorbing structure 112 and the cover end wall 2041 are closely matched, the sealing performance of the first sound absorbing structure 112 to the cover end wall 2041 can be enhanced, which helps to prevent noise from leaking out through the cover end wall 2041. The first sound absorbing structure 112 can also reduce the noise generated by vibration to a certain extent, thereby greatly improving the sound insulation effect, and can also greatly reduce the NVH noise of the electric drive assembly 200, thereby improving the comfort of the vehicle.

[0056] According to some embodiments of the present invention, the first sound absorbing structure 112 can be used to be arranged around the joint between the shell body 203 and the end cover 204, and can effectively fill the gap between the shell body 203 and the end cover 204, so as to further improve the sealing performance of the first sound absorbing structure 112 on the joint between the shell body 203 and the end cover 204. The enhanced sealing performance helps prevent noise from leaking through the gap. The first sound absorbing structure 112 can absorb sound waves leaking from the gap, thereby reducing the noise level. When the first sound absorbing structure 112 is tightly fitted at the joint between the shell body 203 and the end cover 204, it can form a stable supporting structure, which helps prevent the first noise reduction body 11 from deforming or loosening under vibration or external force impact, thereby improving the stability and reliability of the first noise reduction body 11.

[0057] According to some embodiments of the present invention, Figure 5-Figure 7 As shown, the first sound absorbing structure 112 includes: a first sound absorbing layer 1121 and / or a shock absorbing layer 1122, for example: Figure 5 As shown in the first embodiment of the present application, the first sound absorbing structure 112 includes a first sound absorbing layer 1121, or the first sound absorbing structure 112 includes: a shock absorbing layer 1122, or as shown in Figure 6 and Figure 7 As shown, as the second embodiment and the third embodiment of the present application, the first sound absorbing structure 112 includes a first sound absorbing layer 1121 and a shock absorbing layer 1122 .

[0058] The first sound-absorbing layer 1121 can be sound-absorbing cotton, and the shock-absorbing layer 1122 can be constructed as an isolation component, a damping plate and other structures. The isolation components can be in a variety of combinations, for example: the isolation component can be a layer of EVA (Ethylene VinylAcetate) hard shell, or a layer of PU foam, or an EVA hard shell and PU foam stacked, or a layer of sound-absorbing cotton, or a layer of EPDM hard shell, or an EPDM hard shell and sound-absorbing cotton stacked, which can be reasonably selected according to actual conditions. The performance of the first sound-absorbing structure 112 can be further optimized by providing a shock-absorbing layer 1122 in the first sound-absorbing structure 112. When the sound wave encounters the shock-absorbing layer 1122, part of the sound wave energy will be absorbed and converted into other forms of energy (such as heat energy), thereby reducing the reflection and propagation of the sound wave, helping to reduce the noise level and improve the sound absorption effect. As a part of the first sound-absorbing structure 112, the shock-absorbing layer 1122 can effectively enhance the stability of the entire structure. Under vibration or external force impact, the shock absorbing layer 1122 can absorb part of the vibration energy, reduce the impact and vibration of the structure, thereby protecting other components from damage, and helping to extend the service life of the first sound absorbing structure 112. The shock absorbing layer 1122 is combined with the first sound absorbing layer 1121 to jointly improve the overall sound insulation performance. When the sound wave encounters the combination of the shock absorbing layer 1122 and the first sound absorbing layer 1121 during propagation, the propagation path of the sound wave will be hindered, thereby reducing the propagation distance and intensity of the sound wave, which helps to reduce the propagation of noise and improve the sound insulation effect.

[0059] According to some embodiments of the present invention, Figure 6 As shown, the shock absorbing layer 1122 is located on a side of the first sound absorbing layer 1121 away from the first sound insulation shell 111 .

[0060] Among them, as the second embodiment of the present application, Figure 6 As shown, the shock absorbing layer 1122 is located on the side of the first sound absorbing layer 1121 away from the first sound insulation shell 111. At this time, the shock absorbing layer 1122 can be constructed as an isolation component, and the isolation component is formed by stacking EVA hard shell and PU foam. The EVA hard shell, PU foam, the sound absorbing cotton in the first sound absorbing layer 1121 and the first sound insulation shell 111 outside the first sound absorbing layer 1121 are cross-arranged, which can more effectively absorb and disperse the energy of sound waves and vibration waves, thereby improving the overall sound absorption and shock absorption performance. Specifically, the EVA hard shell has good hardness and impact resistance, and can provide stable support for the first sound absorbing structure 112. When subjected to external impact or vibration, the EVA hard shell can effectively absorb and disperse these energies and reduce damage to the structure. PU foam is a multifunctional new special foaming material with excellent elasticity and buffering properties. When sound waves or vibration waves pass through PU foam, the tiny bubble structure inside it can effectively absorb and transform these energies, thereby reducing the reflection and propagation of waves.

[0061] Furthermore, an isolation component is separately added to the side of the first sound absorbing layer 1121 away from the first sound insulation shell 111, which can not only cover the cover end wall 2041 of the end cover 204, which helps to reduce noise leakage and vibration transmission at the cover end wall 2041 of the end cover 204, but also reduce the manufacturing cost of the noise reduction device 100, and provide flexible arrangement and combination options for the composition of the shock absorbing layer 1122.

[0062] According to some embodiments of the present invention, Figure 7 As shown, the shock absorbing layer 1122 is disposed in the first sound absorbing layer 1121 .

[0063] Among them, as the third embodiment of the present application, Figure 7 As shown, the shock absorbing layer 1122 at this time can be constructed as a damping plate, which can effectively suppress the resonance amplitude of the noise reduction device 100 by absorbing and consuming vibration energy. When the sound wave or vibration wave passes through the damping plate, the damping material inside it will convert the energy into heat energy through internal friction and vibration, thereby reducing the transmission of the sound wave or vibration wave. Although the damping plate itself does not directly have a sound absorption function, it is arranged in the first sound absorbing layer 1121. The damping plate can cooperate with the first sound absorbing layer 1121. The damping plate can reduce the reflection and resonance of the sound wave during the propagation process, so that more sound wave energy is absorbed by the first sound absorbing layer 1121, which helps to reduce the noise level and provide a quieter acoustic environment, thereby meeting the user's requirements for the quietness and comfort of the entire vehicle.

[0064] In addition, the damping plate can also enhance the stability of the structure to a certain extent. Under vibration or external force impact, the damping plate can absorb part of the vibration energy, reduce the impact and vibration of the structure, help to extend the service life of the entire first sound absorbing structure 112, and reduce the risk of structural damage caused by vibration.

[0065] According to some embodiments of the present invention, Figure 7 As shown, a boss structure 1123 may be formed on the surface of the shock absorbing layer 1122 .

[0066] Among them, as the second embodiment of the present application, Figure 7 As shown, the shock-absorbing layer 1122 at this time can be constructed as a damping plate, and a boss structure 1123 can be formed on the surface of the damping plate. The presence of the boss structure 1123 increases the unevenness of the damping plate surface, thereby providing more sound wave reflection points. When the sound wave contacts the boss structure 1123, multiple reflections and scattering will occur to change the propagation path of the sound wave on the damping plate surface, increase the contact area and time between the sound wave and the damping plate material, and also increase the absorption and conversion opportunities of the sound wave inside the damping plate, which helps to more effectively absorb and consume the sound wave energy, thereby improving the sound absorption performance.

[0067] In addition, as part of the surface of the damping plate, the boss structure 1123 can increase the overall strength and rigidity of the damping plate, help resist external vibration and impact, maintain the stability and integrity of the damping plate, and under vibration or external force impact, the boss structure 1123 can disperse and absorb part of the energy, reduce the deformation and damage risk of the damping plate surface, and help maintain the long-term stability and sound absorption performance of the damping plate. Further, the boss structure 1123 can be multiple, for example: the boss structure 1123 can be two, three, four, etc., which can be reasonably set according to actual conditions.

[0068] According to some embodiments of the present invention, the second noise reduction body 12 includes: a second sound insulation shell 121 and a second sound absorbing structure, at least part of the inner surface of the second sound insulation shell 121 is provided with the second sound absorbing structure, the end of the first noise reduction body 11 facing the second noise reduction body 12 is open, and the end of the second noise reduction body 12 facing the first noise reduction body 11 is open, along the first direction, the end of the first sound absorbing structure 112 facing the second noise reduction body 12 is located on the inner side of the end of the first noise reduction body 11 facing the second noise reduction body 12, the second sound absorbing structure extends out of the second noise reduction body 12 facing the first noise reduction body 11, and the second sound absorbing structure extends into the first noise reduction body 11 and abuts against the inner surface of the first sound insulation shell 111.

[0069] Among them, at least part of the inner surface of the second sound insulation shell 121 is provided with a second sound absorbing structure. For example, the inner surface of the second sound insulation shell 121 may be provided with the second sound absorbing structure on half, one third, or other proportional parts, but the present invention is not limited to this. The entire inner surface of the second sound insulation shell 121 may be provided with the second sound absorbing structure, as long as at least part of the inner surface of the second sound insulation shell 121 is provided with the second sound absorbing structure.

[0070] The end of the first noise reduction body 11 facing the second noise reduction body 12 is open, and the end of the second noise reduction body 12 facing the first noise reduction body 11 is open. Along the first direction, the end of the first sound absorbing structure 112 facing the second noise reduction body 12 is located inside the end of the first noise reduction body 11 facing the second noise reduction body 12, and the end of the second sound absorbing structure facing the first noise reduction body 11 extends out of the second noise reduction body 12, and the second sound absorbing structure extends into the first noise reduction body 11 and abuts against the inner surface of the first sound insulation shell 111, so that the first sound absorbing structure 112 The two sound-absorbing structures can cover the gap between the first sound-insulating shell 111 and the second sound-insulating shell 121, and the first sound-insulating shell 111 can cover the gap between the first sound-absorbing structure 112 and the second sound-absorbing structure, so that the gap between the first sound-insulating shell 111 and the second sound-insulating shell 121 is blocked, and the gap between the first sound-absorbing structure 112 and the second sound-absorbing structure is blocked, thereby improving the sealing performance of the noise reduction device 100, reducing the channel for sound leakage, and helping to reduce the NVH noise of the electric drive assembly 200.

[0071] Furthermore, if Figure 1 and Figure 3 As shown, when assembling the noise reduction device 100, one of the first noise reduction body 11 and the second noise reduction body 12 can be assembled first, and then the remaining one can be assembled. After the first noise reduction body 11 and the second noise reduction body 12 are assembled, they can be fixedly connected by Velcro 30, and then fixed to the electric drive assembly 200 by snap buckles, thereby achieving the fixation of the noise reduction device 100.

[0072] According to some embodiments of the present invention, the end of the first sound absorbing structure 112 facing the second noise reduction body 12 abuts against the end of the second sound absorbing structure facing the first noise reduction body 11, so that the first sound absorbing structure 112 and the second sound absorbing structure together form a more complete and continuous sound absorbing surface, which helps to absorb sound wave energy more effectively, further improve the sound absorption effect, and reduce the noise level. And when the ends of the first sound absorbing structure 112 and the second sound absorbing structure abut against each other, a mutually supporting relationship is formed, which helps to reduce structural deformation or damage caused by vibration or impact.

[0073] The first noise reduction body 11 and the second noise reduction body 12 can jointly achieve the purpose of noise reduction. When the ends of the first sound absorbing structure 112 and the second sound absorbing structure are abutted against each other, the synergy between the first noise reduction body 11 and the second noise reduction body 12 is enhanced, which helps to more effectively reduce the noise level, improve the overall noise reduction effect, and also help to ensure the stability and consistency of the noise reduction device 100 at different frequencies and intensities.

[0074] According to some embodiments of the present invention, the end of the first soundproof shell 111 facing the second noise reduction body 12 abuts against the end of the second soundproof shell 121 facing the first noise reduction body 11, so that the first soundproof shell 111 and the second soundproof shell 121 together form a more complete and continuous soundproof barrier, which helps to more effectively block the propagation path of noise and improve the noise reduction performance. And when the end of the first soundproof shell 111 facing the second noise reduction body 12 abuts against the end of the second soundproof shell 121 facing the first noise reduction body 11, a mutually supporting relationship is formed between the first soundproof shell 111 and the second soundproof shell 121, which helps to reduce structural deformation or damage caused by vibration or impact.

[0075] The first noise reduction body 11 and the second noise reduction body 12 can jointly achieve the purpose of noise reduction. When the end of the first sound insulation shell 111 facing the second noise reduction body 12 abuts against the end of the second sound insulation shell 121 facing the first noise reduction body 11, the synergy between the first noise reduction body 11 and the second noise reduction body 12 is enhanced, which helps to more effectively reduce the noise level, improve the overall noise reduction effect, and also help to ensure the stability and consistency of the noise reduction device 100 at different frequencies and intensities.

[0076] According to some embodiments of the present invention, Figure 1 and Figure 3 As shown, one of the multiple noise reduction bodies 10 surrounds the joint between the shell body 203 and the end cover 204 to cover the joint between the shell body 203 and the end cover 204, which helps to reduce noise leakage and vibration transmission at the joint between the shell body 203 and the end cover 204, and can further achieve complete coverage of the controller by the noise reduction device 100, so as to further absorb, reflect and isolate the noise during the operation of the electric drive assembly 200, thereby reducing the noise level of the whole vehicle, and can also further improve the NVH performance of the whole vehicle, making the vehicle quieter and smoother during driving, so as to meet the user's requirements for the quietness and comfort of the whole vehicle.

[0077] According to some embodiments of the present invention, Figure 1 and Figure 3 As shown, the first sound insulation shell 111 may have an annular shell wall 1111 used to be arranged around the abutment between the shell body 203 and the end cover 204, the annular shell wall 1111 includes a shell wall body 1112 and a flip cover 1113, the shell wall body 1112 is formed with an assembly notch 1114, and the flip cover 1113 can be movably arranged on the shell wall body 1112 to open or close the assembly notch 1114.

[0078] Among them, the first sound insulation shell 111 has an annular shell wall 1111 used to be set around the abutment between the shell body 203 and the end cover 204. By setting the annular shell wall 1111, the abutment between the shell body 203 and the end cover 204 is better sealed, which helps to prevent noise from leaking through the gap at the abutment between the shell body 203 and the end cover 204, thereby greatly improving the sound insulation effect. The annular shell wall 1111 includes a shell wall body 1112 and a flap 1113. The shell wall body 1112 is formed with an assembly notch 1114. The shape and size of the assembly notch 1114 are adapted to the shape and size of the flap 1113, so that the flap 1113 can be movably arranged on the shell wall body 1112 to open or close the assembly notch 1114. When it is necessary to assemble other components from the assembly notch 1114, the flap 1113 can be opened to open the assembly notch 1114. When the assembly is completed, the flap 1113 can be closed to close the assembly notch 1114, which can ensure the sealing of the assembly notch 1114, thereby reducing the channel for sound leakage. In this way, the assembly notch 1114 can be easily opened during the assembly process, and the sealing of the assembly notch 1114 can also be ensured when the flap 1113 is closed, which not only reduces the difficulty of assembly, but also does not affect the sealing of the noise reduction device 100, thereby reducing the channel for sound leakage.

[0079] At the same time, the design of the flip cover 1113 also facilitates the disassembly and repair of the first sound insulation shell 111 when necessary, thereby reducing maintenance costs. Since the flip cover 1113 can be opened, when a fault occurs inside the first sound insulation shell 111 or cleaning is required, the first sound insulation shell 111 can be easily entered for inspection and repair, thereby improving the maintainability of the first sound insulation shell 111 and extending its service life.

[0080] It can be explained that the design of the shell wall body 1112 and the flap 1113 has high flexibility and can be adjusted and optimized according to the needs of specific application scenarios. The flap 1113 and the shell wall body 1112 can also be fixedly connected by Velcro 30 to achieve sealing of the flap 1113.

[0081] According to some embodiments of the present invention, Figure 4 As shown, the first sound absorbing structure 112 includes: a first sub-sound absorbing structure 1124 and a second sub-sound absorbing structure 1125. The first sub-sound absorbing structure 1124 is arranged on the inner surface of the shell wall body 1112, and the second sub-sound absorbing structure 1125 is arranged on the inner surface of the flip cover 1113. Along the circumference of the annular shell wall 1111, the first sub-sound absorbing structure 1124 extends out of the end of the shell wall body 1112, and the end of the second sub-sound absorbing structure 1125 is located inside the end of the flip cover 1113. When the flip cover 1113 closes the assembly notch 1114, the first sub-sound absorbing structure 1124 is located inside the flip cover 1113 and abuts against the inner surface of the flip cover 1113.

[0082] Among them, Figure 4 As shown, the first sound absorbing structure 112 includes: a first sub-sound absorbing structure 1124 and a second sub-sound absorbing structure 1125. The first sub-sound absorbing structure 1124 is arranged on the inner surface of the shell wall body 1112, and the second sub-sound absorbing structure 1125 is arranged on the inner surface of the flip cover 1113, thereby achieving full coverage of the internal space of the annular shell wall 1111, being able to more effectively absorb and transform sound wave energy, and reducing the reflection and transmission of sound waves inside the annular shell wall 1111, thereby enhancing the overall sound absorption and sound insulation effects.

[0083] Along the circumference of the annular shell wall 1111, the first sub-sound absorbing structure 1124 extends out of the end of the shell wall body 1112, and the end of the second sub-sound absorbing structure 1125 is located inside the end of the flip cover 1113. When the flip cover 1113 closes the assembly notch 1114, the first sub-sound absorbing structure 1124 is located inside the flip cover 1113 and abuts against the inner surface of the flip cover 1113, and the end of the flip cover 1113 abuts against the end of the shell wall body 1112, and the end of the first sub-sound absorbing structure 1124 extending out of the shell wall body 1112 abuts against the end of the second sub-sound absorbing structure 1125. The flap 1113 is connected so that the gap between the first sub-sound absorbing structure 1124 and the second sub-sound absorbing structure 1125 can be covered, and the first sub-sound absorbing structure 1124 can cover the gap between the shell wall body 1112 and the flap 1113, so that the gap between the shell wall body 1112 and the flap 1113 is blocked, and the gap between the first sub-sound absorbing structure 1124 and the second sub-sound absorbing structure 1125 is blocked, thereby improving the sealing performance between the shell wall body 1112 and the flap 1113, reducing the channel for sound leakage, and helping to reduce the NVH noise of the electric drive assembly 200.

[0084] According to some embodiments of the present invention, at least one noise reduction body 10 includes: a sound insulation shell and a sound absorbing structure, at least part of the inner surface of the sound insulation shell is provided with the sound absorbing structure, the sound insulation shell is formed with a first assembly hole 13, and the sound absorbing structure is formed with a second assembly hole, the first assembly hole 13 and the second assembly hole are arranged opposite to each other, and the cross-sectional area of ​​the first assembly hole 13 is smaller than the cross-sectional area of ​​the second assembly hole.

[0085] The soundproof shell is the outer shell structure of each noise reduction body 10, and the sound-absorbing structure is the internal structure of each noise reduction body 10. Taking the first noise reduction body 11 as an example, the soundproof shell is the first soundproof shell 111, and the sound-absorbing structure is the first sound-absorbing structure 112. Taking the second noise reduction body 12 as an example, the soundproof shell is the second soundproof shell 121, and the sound-absorbing structure is the second sound-absorbing structure. The soundproof shell is provided with a sound-absorbing structure on at least part of the inner surface, and the soundproof shell is formed with a first assembly hole 13, and the sound-absorbing structure is formed with a second assembly hole. The first assembly hole 13 and the second assembly hole are arranged opposite to each other. By setting the first assembly hole 13 and the second assembly hole, the electric drive assembly 200 can be partially connected to the outside to achieve assembly between the electric drive assembly 200 and other components or connection of the wiring harness. The cross-sectional area of ​​the first assembly hole 13 is smaller than the cross-sectional area of ​​the second assembly hole. It can be explained that the sound insulation shell is made of hard material, and the sound absorption structure is made of soft sound absorption cotton. Therefore, if the first assembly hole 13 formed by the sound insulation shell is too small, it cannot be assembled. The second assembly hole formed by the sound absorption structure can be deformed and will not hinder the assembly between the electric drive assembly 200 and other components or the connection of the wiring harness. Such a setting can not only ensure the assembly between the electric drive assembly 200 and other components or the connection of the wiring harness, but also reduce the size of the opening of the sound absorption structure, thereby reducing the noise leakage at the opening of the sound absorption structure, and further improving the sound absorption effect of the noise reduction device 100.

[0086] According to some embodiments of the present invention, Figure 3 As shown, each noise reduction body 10 is suitable for abutting against the electric drive assembly housing 201, which can effectively reduce the channel for sound leakage, thereby enhancing the noise reduction effect, so that the noise reduction body 10 can more fully exert its sound insulation and sound absorption performance, limit the noise generated by the electric drive assembly 200 to a minimum range, and improve the overall noise reduction efficiency. The abutment between the noise reduction body 10 and the electric drive assembly housing 201 not only helps to reduce noise, but also enhances the stability of the structure. Through a tight connection, the noise reduction body 10 can provide additional support for the electric drive assembly 200, reduce structural deformation or damage caused by vibration or external impact, and help to extend the service life of the electric drive assembly 200 and maintain it in good working condition.

[0087] like Figure 3As shown, the electric drive assembly component according to an embodiment of the present invention includes: an electric drive assembly 200, the electric drive assembly 200 includes an electric drive assembly shell 201, the electric drive assembly shell 201 has a controller shell 202, the controller shell 202 includes a shell body 203 and an end cover 204, the shell body 203 and the end cover 204 are arranged along a first direction, along the first direction, the end cover 204 has a cover end wall 2041, a noise reduction device 100, the noise reduction device 100 is the noise reduction device 100 of the above embodiment, the electric drive assembly 200 is installed in the installation space 20, and one of the multiple noise reduction bodies 10 is used to cover the cover end wall 2041.

[0088] Among them, the electric drive assembly 200 includes an electric drive assembly housing 201, which is the external protection structure of the electric drive assembly 200. Its main function is to protect the key components such as the internal motor, controller, and transmission from damage by the external environment, such as dust, moisture, vibration, and impact, etc. It also plays the role of heat dissipation and isolation of electromagnetic interference, ensuring that the electric drive assembly 200 can work stably and efficiently. The electric drive assembly housing 201 has a controller housing 202, and the controller housing 202 includes a housing body 203 and an end cover 204. The housing body 203 and the end cover 204 are arranged along a first direction. Along the first direction, the end cover 204 has a cover end wall 2041. The close fit between the housing body 203 and the end cover 204 can form an effective heat dissipation channel, improve the heat dissipation efficiency, help reduce the operating temperature of the controller, and extend its service life.

[0089] The installation space 20 is used to install the electric drive assembly 200, providing a relatively quiet and stable operating environment for the electric drive assembly 200. The multiple noise reduction bodies 10 can also effectively absorb, reflect and isolate the noise during the operation of the electric drive assembly 200, thereby reducing the noise level of the entire vehicle, and can also significantly improve the NVH performance of the entire vehicle, making the vehicle quieter and smoother during driving.

[0090] One of the multiple noise reduction bodies 10 is used to cover the cover end wall 2041 of the end cover 204, which helps to reduce noise leakage and vibration transmission at the cover end wall 2041 of the end cover 204, and can achieve complete coverage of the controller by the noise reduction device 100, so as to further absorb, reflect and isolate the noise during the operation of the electric drive assembly components, thereby reducing the noise level of the entire vehicle, and can also further improve the NVH performance of the entire vehicle, making the vehicle quieter and smoother during driving, so as to meet the user's requirements for the quietness and comfort of the entire vehicle.

[0091] The vehicle according to the embodiment of the present invention, including the electric drive assembly of the above embodiment, can achieve complete coverage of the controller by the noise reduction device 100, so as to greatly reduce the NVH noise of the electric drive assembly, thereby meeting the user's requirements for the quietness and comfort of the entire vehicle.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0093] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A noise reduction device for an electric drive assembly, characterized in that: The electric drive assembly includes an electric drive assembly housing, the electric drive assembly housing has a controller housing, the controller housing includes a housing body and an end cover, the housing body and the end cover are arranged along a first direction, along the first direction, the end cover has a cover end wall, and the noise reduction device includes: A plurality of noise reduction bodies are arranged along the first direction, and any two adjacent noise reduction bodies are connected so that the plurality of noise reduction bodies jointly define an installation space, the installation space is used to install the electric drive assembly, and one of the plurality of noise reduction bodies is used to cover the cover end wall.

2. The noise reduction device according to claim 1, characterized in that: The multiple noise reduction bodies include: a first noise reduction body and a second noise reduction body, the first noise reduction body and the second noise reduction body jointly define an installation space, the first noise reduction body is used to install the controller housing so that the cover end wall is located in the first noise reduction body.

3. The noise reduction device according to claim 2, characterized in that: The first noise reduction body comprises: a first sound insulation shell and a first sound absorbing structure. At least part of the inner surface of the first sound insulation shell is provided with the first sound absorbing structure. The first sound absorbing structure is suitable for corresponding to the cover end wall.

4. The noise reduction device according to claim 3, characterized in that: The first sound absorbing structure includes: a first sound absorbing layer and / or a shock absorbing layer.

5. The noise reduction device according to claim 4, characterized in that: The shock-absorbing layer is located on a side of the first sound-absorbing layer away from the first sound-insulating shell.

6. The noise reduction device according to claim 4, characterized in that: The shock-absorbing layer is arranged in the first sound-absorbing layer.

7. The noise reduction device according to claim 6, characterized in that: A boss structure is formed on the surface of the shock-absorbing layer.

8. The noise reduction device according to claim 3, characterized in that: The second noise reduction body includes: a second sound insulation shell and a second sound absorbing structure, the second sound absorbing structure is provided on at least part of the inner surface of the second sound insulation shell, the end of the first noise reduction body facing the second noise reduction body is open, and the end of the second noise reduction body facing the first noise reduction body is open, along the first direction, the end of the first sound absorbing structure facing the second noise reduction body is located on the inner side of the end of the first noise reduction body facing the second noise reduction body, the end of the second sound absorbing structure facing the first noise reduction body extends out of the second noise reduction body, and the second sound absorbing structure extends into the first noise reduction body and abuts against the inner surface of the first sound insulation shell.

9. The noise reduction device according to claim 8, characterized in that: An end portion of the first sound absorbing structure facing the second noise reduction body abuts against an end portion of the second sound absorbing structure facing the first noise reduction body.

10. The noise reduction device according to claim 8, characterized in that: An end portion of the first soundproof shell facing the second noise reduction body abuts against an end portion of the second soundproof shell facing the first noise reduction body.

11. The noise reduction device according to claim 3, characterized in that: One of the plurality of noise reduction bodies surrounds abutment between the shell body and the end cover to cover the abutment between the shell body and the end cover.

12. The noise reduction device according to claim 11, characterized in that: The first sound insulation shell has an annular shell wall arranged around the abutment between the shell body and the end cover, the annular shell wall includes a shell wall body and a flip cover, the shell wall body is formed with an assembly notch, and the flip cover can be movably arranged on the shell wall body to open or close the assembly notch.

13. The noise reduction device according to claim 12, characterized in that: The first sound absorbing structure comprises: a first sub-sound absorbing structure and a second sub-sound absorbing structure, wherein the first sub-sound absorbing structure is arranged on the inner surface of the shell wall body, and the second sub-sound absorbing structure is arranged on the inner surface of the flip cover, and along the circumference of the annular shell wall, the first sub-sound absorbing structure extends out of the end of the shell wall body, and the end of the second sub-sound absorbing structure is located inside the end of the flip cover, and when the flip cover closes the assembly notch, the first sub-sound absorbing structure is located inside the flip cover and abuts against the inner surface of the flip cover.

14. The noise reduction device according to claim 1, characterized in that: At least one of the noise reduction bodies includes: a sound insulation shell and a sound absorbing structure, at least part of the inner surface of the sound insulation shell is provided with the sound absorbing structure, the sound insulation shell is formed with a first assembly hole, and the sound absorbing structure is formed with a second assembly hole, the first assembly hole and the second assembly hole are arranged opposite to each other, and the cross-sectional area of ​​the first assembly hole is smaller than the cross-sectional area of ​​the second assembly hole.

15. The noise reduction device according to any one of claims 1 to 14, characterized in that: Each of the noise reduction bodies is suitable for abutting against the electric drive assembly housing.

16. An electric drive assembly, characterized in that: include: An electric drive assembly, wherein the electric drive assembly comprises an electric drive assembly housing, wherein the electric drive assembly housing has a controller housing, wherein the controller housing comprises a housing body and an end cover, wherein the housing body and the end cover are arranged along a first direction, and wherein the end cover has a cover end wall along the first direction; A noise reduction device, wherein the noise reduction device is a noise reduction device according to any one of claims 1 to 15, wherein the electric drive assembly is installed in the installation space, and one of the multiple noise reduction bodies is used to cover the cover end wall.

17. A vehicle, characterized in that: Comprising the electric drive assembly according to claim 16.

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