Vibration and noise reduction structural component, electric driving system and vehicle

Abstract

The invention relates to a vibration and noise reduction structural component, an electric driving system and a vehicle, the vibration and noise reduction structural component comprises an acoustic black hole plate layer, and at least one cavity is formed in the acoustic black hole plate layer. And at least one part of the surface of the cavity is a cambered surface. The acoustic black hole plate layer further comprises at least one through hole penetrating through the cambered surface of the cavity and the surface of the acoustic black hole plate layer, the through hole is located at the position of the minimum distance between the cambered surface of the cavity and the surface of the acoustic black hole plate layer, and vibration noise from low frequency to high frequency can be accurately absorbed.

Description

Technical Field

[0001] The present application relates to the technical field of vibration reduction and noise reduction, and in particular to a vibration reduction and noise reduction structural component, an electric drive system and a vehicle. Background Art

[0002] The electric drive system is one of the main noise sources of new energy vehicles. To reduce the noise of the electric drive system, two methods are usually used to reduce vibration and noise, namely, using the method of reducing vibration excitation at the noise source and using various acoustic wrapping methods on the noise path. Among the above methods, the method of reducing vibration excitation will sacrifice the power performance of the electric drive system to a certain extent, and the use of acoustic wrapping not only increases costs but also takes up valuable space for layout.

[0003] Through the "acoustic black hole effect", new ways and new ideas are provided for vibration reduction and noise reduction. The concept of acoustic black hole can be compared to the concept of black hole in astrophysics. In astrophysics, a black hole refers to a singularity with infinite density, infinite space-time curvature, infinitely small volume, and infinite heat, which can swallow all light and any matter in the adjacent universe. The concept of an acoustic black hole can be compared with it. The acoustic black hole effect is to gradually reduce the phase velocity and group velocity of the sound wave to zero by adjusting the geometric parameters of the electric drive system cover in a power law. Ideally, the propagation speed of the sound wave at the end of the acoustic black hole structure will be reduced to zero, so there will be no wave reflection, and efficient vibration reduction and noise reduction can be achieved. However, the existing acoustic black hole structural parts cannot accurately absorb the frequency of sound waves, and the control effect of full-frequency vibration noise is not ideal, resulting in poor vibration reduction and noise reduction.

[0004] CN117789686A discloses an adsorption-type acoustic black hole underwater noise reduction flat plate structure and application, comprising a plurality of unit acoustic black hole plates adsorbed on the lower surface of a unit uniform plate, and a unit damping layer connected to the lower surface of the unit acoustic black hole plate, forming a noise reduction flat plate structure; wherein, the upper end surface of the unit acoustic black hole plate is a concave arc surface divided and connected by ABH grooves that are vertically and cross-distributed to each other, the unit uniform plate can concentrate its internal vibration energy on the unit acoustic black hole plate, and utilize the unit damping layer to absorb and dissipate low-frequency vibration noise, thereby realizing underwater noise reduction of the acoustic black hole effect, but the adsorption-type acoustic black hole underwater noise reduction flat plate structure cannot absorb and dissipate full-frequency vibration noise.

[0005] CN117847123A discloses a constrained damping structure containing an acoustic black hole, comprising an acoustic black hole layer and a damping constraint layer; the damping constraint layer comprises alternatingly arranged micro-nano damping layers and carbon fiber constraint layers, the micro-nano damping layers and the carbon fiber constraint layers overlap 6-8 layers, wherein the acoustic black hole layer absorbs and dissipates low-frequency vibration noise, and then the damping constraint layer is used to further enhance the absorption and dissipation of low-frequency vibration noise, but the constrained damping structure containing the acoustic black hole cannot control full-frequency vibration noise. Summary of the invention

[0006] The purpose of this application is to solve the defect that the existing acoustic black hole structure cannot accurately absorb the sound wave frequency, resulting in unsatisfactory control effect on the full-frequency vibration noise.

[0007] In order to achieve the above purpose, the technical solution adopted in this application is as follows:

[0008] According to the first aspect of the present application, a vibration-damping and noise-reducing structural component is provided. The vibration-damping and noise-reducing structural component includes: an acoustic black hole plate layer. At least one cavity is arranged inside the acoustic black hole plate layer. At least a part of the surface of the cavity is a curved surface. The acoustic black hole plate layer also includes at least one perforation penetrating the curved surface of the cavity and the surface of the acoustic black hole plate layer, and the perforation is located at the minimum distance position between the curved surface of the cavity and the surface of the acoustic black hole plate layer.

[0009] According to the above technical means, when the vibration noise enters the cavity set inside the acoustic black hole plate layer, it will gather inside the cavity, and the vibration noise will be reflected and scattered by the arc surface multiple times, thereby increasing the interaction between the vibration noise and the cavity, and then dissipating the sound wave energy, so that the energy of the vibration noise gathers and attenuates and dissipates along the arc surface, which can gradually dissipate the medium and low frequency sound waves, or even reduce to zero, and no longer continue to propagate; at the same time, the perforation has the ability to absorb sound, and after the medium and high frequency noise enters the cavity through the perforation, it will gather inside the cavity and attenuate and dissipate multiple times, which can reduce the propagation of medium and high frequency vibration noise. Moreover, due to the cavity structure in the acoustic black hole plate layer, when the vibration excitation reaches the vibration reduction and noise reduction structural parts, it can play a buffering role and reduce the vibration excitation; therefore, through the above setting, the acoustic black hole plate layer can accurately absorb the vibration noise of multiple frequency bands from low frequency to high frequency, and has a good vibration reduction and noise reduction effect.

[0010] In a possible implementation, the acoustic black hole plate layer includes a first groove plate and a second groove plate.

[0011] The first groove plate includes: a first surface, a second surface and at least one first groove. The first surface and the second surface are arranged opposite to each other. The opening of the first groove faces the first surface.

[0012] The second groove plate includes: a third surface, a fourth surface and at least one second groove. The third surface and the fourth surface are arranged opposite to each other. The opening of the second groove faces the third surface.

[0013] The first surface and the third surface are arranged opposite to each other and connected, at least one first groove and at least one second groove are arranged correspondingly, and the corresponding first grooves and second grooves form a cavity.

[0014] The first groove has a first arc surface, the second groove has a second arc surface, the middle area of ​​the first groove is provided with at least one through hole, and the extension direction of the middle area of ​​the first groove is consistent with the extension direction of the first groove.

[0015] According to the above technical means, the acoustic black hole plate layer can not only accurately absorb vibration noise in multiple frequency bands from low frequency to high frequency, and has a good effect of reducing vibration and noise, but also make the acoustic black hole plate layer more convenient to process and reduce the difficulty of processing.

[0016] In a possible implementation, along a first specified direction, the distance between the first arc surface and the second surface decreases in a power exponential law, the first specified direction is a direction from an edge of the first arc surface to a center, and the first specified direction is perpendicular to an extension direction of the first groove. Along a second specified direction, the distance between the second arc surface and the fourth surface decreases in a power exponential law, the second specified direction is a direction from an edge of the second arc surface to a center, and the second specified direction is perpendicular to an extension direction of the second groove.

[0017] According to the above-mentioned technical means, the vibration-damping and noise-reducing structural parts provided in some embodiments of the present application can more effectively gather and absorb vibration noise energy, and further improve the vibration-damping and noise-reducing effect of the acoustic black hole plate layer.

[0018] In a possible implementation, a dimension of the first groove plate along the first direction is equal to a dimension of the second groove plate along the first direction at the same position in the first direction; and the first direction is perpendicular to the second surface.

[0019] According to the above technical means, the vibration-damping and noise-reducing structural parts provided in some embodiments of the present application can make the scattering and energy loss of vibration noise on the two curved surfaces in the cavity consistent, thereby improving the sound absorption effect of the cavity and further improving the vibration-damping and noise-reducing effect of the cavity.

[0020] In a possible implementation, the first surface of the first groove plate has a plurality of first grooves, which are arranged at intervals and arranged along a second direction; the third surface of the second groove plate has a plurality of second grooves, which are arranged at intervals and arranged along a second direction. The second direction is perpendicular to the extension direction of the first grooves.

[0021] According to the above-mentioned technical means, the multiple cavities of the vibration-damping and noise-reducing structural parts provided in some embodiments of the present application can provide a larger sound absorption area and a more complex sound wave propagation path, so that the vibration noise can be more effectively absorbed and dissipated, which can further improve the vibration-damping and noise-reduction effect of the acoustic black hole plate layer.

[0022] In a possible implementation, a plurality of through holes are disposed in a middle region of the first groove, and the plurality of through holes are arranged in sequence along an extension direction of the first groove.

[0023] According to the above-mentioned technical means, the multiple perforations of the vibration-damping and noise-reducing structural parts provided in some embodiments of the present application can absorb more medium and high-frequency vibration noise, further improving the vibration-damping and noise-reducing effect of the acoustic black hole plate layer; and can also form a wide-band sound-absorbing structure, which can further improve the vibration-damping and noise-reducing effect of the acoustic black hole plate layer.

[0024] In a possible implementation manner, the diameter of the perforation is less than or equal to 1 mm.

[0025] According to the above technical means, the vibration reduction and noise reduction structural parts provided in some embodiments of the present application can enable the acoustic black hole plate layer to have good vibration reduction and noise reduction effects in multiple frequency bands from low frequency to high frequency.

[0026] In a possible implementation, the fourth surface of the second groove plate is provided with a damping material, the damping material is correspondingly arranged in the middle area of ​​the second groove, and the extension direction of the middle area of ​​the second groove is consistent with the extension direction of the second groove.

[0027] According to the above technical means, the damping material of the vibration and noise reduction structural parts provided in some embodiments of the present application can effectively absorb the vibration noise that has not been dissipated, and can further improve the vibration and noise reduction effect of the acoustic black hole plate layer.

[0028] In a possible implementation, the vibration and noise reduction structural component further includes: a connecting layer, which is disposed between the first groove plate and the second groove plate and connected to the first surface of the first groove plate and the third surface of the second groove plate.

[0029] According to the above-mentioned technical means, the vibration-damping and noise-reducing structural parts provided in some embodiments of the present application can increase the structural stability of the acoustic black hole plate layer. When damping glue is used as the connecting layer, the damping glue can absorb medium and low frequency vibration noise, which can further improve the vibration-damping and noise-reducing effect of the acoustic black hole plate layer.

[0030] In a possible implementation, the distance between the opening boundary of the first groove closest to the boundary of the first surface in at least one first groove and the boundary of the first surface is greater than the set distance. The distance between the opening boundary of the second groove closest to the boundary of the third surface in at least one second groove and the boundary of the third surface is greater than the set distance.

[0031] According to the above technical means, the vibration-damping and noise-reducing structural components provided in some embodiments of the present application can facilitate the connection between the vibration-damping and noise-reducing structural components and other components.

[0032] In a possible implementation manner, the vibration and noise reduction structural component further includes: a filling layer, which is arranged in the cavity.

[0033] According to the above technical means, the vibration excitation and vibration noise of the present application can be absorbed by the filling layer, which can reduce the reflection and propagation of the vibration noise; and can improve the vibration reduction and noise reduction effect of the vibration reduction and noise reduction structural parts.

[0034] In a possible implementation, the material of the filling layer includes: sound-absorbing cotton.

[0035] According to the above technical means, the vibration-damping and noise-reducing structural parts provided in some embodiments of the present application can enhance the vibration and noise dissipation effect and improve the vibration-damping and noise-reducing effect of the vibration-damping and noise-reducing structural parts.

[0036] In a possible implementation, the material of the acoustic black hole plate layer includes: Al-Si-Cu alloy material.

[0037] According to the above-mentioned technical means, the vibration-damping and noise-reducing structural parts provided in some embodiments of the present application can ensure the stability and reliability of the acoustic black hole plate layer in a complex working environment.

[0038] According to a second aspect of the present application, an electric drive system is provided, comprising: a housing and a vibration reduction and noise reduction object. The housing comprises a cover, and the cover comprises a vibration reduction and noise reduction structural member according to any one of the above possible implementations. The vibration reduction and noise reduction object is arranged inside the housing.

[0039] In a possible implementation manner, the vibration reduction and noise reduction structural member includes an acoustic black hole plate layer. The first groove plate is closer to the vibration reduction and noise reduction object than the second groove plate.

[0040] According to the above-mentioned technical means, the vibration-damping and noise-reducing structural parts provided in some embodiments of the present application can more effectively carry medium and high-frequency vibration noise into the cavity through the sound-absorbing effect of the perforations, and then gather and attenuate and dissipate it in the cavity multiple times, thereby improving the vibration-damping and noise-reducing effect of the electric drive system.

[0041] According to a third aspect of the present application, a vehicle includes: an electric drive system in the above possible implementation manner.

[0042] Beneficial effects of this application:

[0043] (1) The vibration reduction and noise reduction structural member of the present application utilizes the acoustic black hole effect by setting a cavity inside the acoustic black hole plate layer, so that when the vibration noise enters the cavity, it will be gathered inside the cavity, and will be reflected and scattered multiple times on the curved surface of the cavity, thereby increasing the interaction between the vibration noise and the cavity, and then dissipating the energy of the sound wave, so that the energy of the vibration noise is gathered, attenuated and dissipated along the curved surface of the cavity, which can gradually dissipate the medium and low frequency sound waves, or even reduce to zero, and no longer continue to propagate; at the same time, the perforation has the sound absorption ability, and after the medium and high frequency noise enters the cavity through the perforation, it will be gathered inside the cavity and attenuated and dissipated multiple times, which can reduce the propagation of medium and high frequency vibration noise. Moreover, due to the cavity structure in the acoustic black hole plate layer, when the vibration excitation reaches the vibration reduction and noise reduction structural member, it plays a buffering role, which can reduce the vibration excitation; therefore, through the above-mentioned setting, the acoustic black hole plate layer can accurately absorb the vibration noise of multiple frequency bands from low frequency to high frequency, and has a good vibration reduction and noise reduction effect.

[0044] (2) The vibration-damping and noise-reducing structural member of the present application can form multiple cavities by setting multiple first grooves and multiple second grooves, which can provide a larger sound absorption area and a more complex sound wave propagation path, so that vibration noise can be more effectively absorbed and dissipated, and the vibration-damping and noise-reducing effect of the acoustic black hole plate layer can be further improved.

[0045] (3) The vibration-damping and noise-reducing structural member of the present application can absorb more medium- and high-frequency vibration noise by setting multiple perforations on the first groove, further improving the vibration-damping and noise-reducing effect of the acoustic black hole plate layer; and can also form a wide-band sound-absorbing structure, which can further improve the vibration-damping and noise-reducing effect of the acoustic black hole plate layer.

[0046] (4) The vibration-damping and noise-reducing structural member of the present application can improve the stability of the vibration-damping and noise-reducing structural member by providing a connecting layer.

[0047] (5) The vibration-damping and noise-reducing structural component of the present application is provided with a filling layer, and vibration excitation and vibration noise can be absorbed by the filling layer, which can reduce the reflection and propagation of vibration noise and improve the vibration-damping and noise-reducing effect of the vibration-damping and noise-reducing structural component.

[0048] (6) When the vibration-reducing and noise-reducing structural parts of the present application are applied to the cover of the electric drive system, the vibration-reducing and noise-reducing structural parts can make the electric drive system achieve the effect of vibration reduction and noise reduction. At the same time, when processing the acoustic black hole layer of the vibration-reducing and noise-reducing structural parts, part of the material is removed, and the cross-sectional area is reduced by about two-thirds. In theory, a single component can reduce the weight by 60%, thus achieving the lightweight of the cover. Moreover, the cover itself also has the functions of dustproof and electromagnetic shielding. When the vibration-reducing and noise-reducing structural parts are used in the cover, since the vibration-reducing and noise-reducing structural parts are complete plate-like structures, the dustproof and electromagnetic shielding functions of the cover will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A cross-sectional view of a first groove plate of a vibration and noise reduction structural member shown as an exemplary embodiment;

[0050] Figure 2 The diagram shows a schematic structural diagram of a first groove plate of a vibration and noise reduction structural member according to an exemplary embodiment;

[0051] Figure 3 A schematic structural diagram of a first groove plate of a vibration and noise reduction structural member is shown as another exemplary embodiment;

[0052] Figure 4 A cross-sectional view of a second groove plate of a vibration and noise reduction structural member shown as an exemplary embodiment;

[0053] Figure 5 The figure shows a schematic structural diagram of a second groove plate of a vibration and noise reduction structural member according to an exemplary embodiment;

[0054] Figure 6 The figure shows a cross-sectional view of an acoustic black hole plate layer of a vibration and noise reduction structural member as an exemplary embodiment;

[0055] Figure 7 A top view of a first groove plate of a vibration and noise reduction structural member shown as an exemplary embodiment;

[0056] Figure 8 A bottom view of a second groove plate of a vibration and noise reduction structural member shown as an exemplary embodiment;

[0057] Fig. 9 A schematic diagram of the structure of a first groove plate of a vibration and noise reduction structural member is shown as another exemplary embodiment;

[0058] Fig.10 Shown is a schematic diagram of an electric drive system showing an exemplary embodiment.

[0059] In the figure, 10—acoustic black hole plate layer, 100—first groove plate, 110—first surface, 120—second surface, 130—first groove, 131—first arc surface, 140—perforation, 200—second groove plate, 210—third surface, 220—fourth surface, 230—second groove, 231—second arc surface, 20—connecting layer, 30—filling layer, H—cavity, 3—shell, 31—cover. DETAILED DESCRIPTION

[0060] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0061] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0062] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. Unless otherwise specified, the above-mentioned directional description can be flexibly set in the process of actual application under the condition that the relative positional relationship shown in the accompanying drawings is met.

[0063] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] In the present application, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, article or device including the element.

[0065] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0066] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0067] In the drawings of this application, for example, 1 / 2 indicates that both component 1 and component 2 can refer to the component, for example, Figure 1 130 / 131 indicates that both the first groove 130 and the first arc surface 131 can be represented by this component. Other similar reference numerals in the drawings also follow the above description. Other similar reference numerals in the drawings also follow the above description.

[0068] The NVH performance of a vehicle refers to the comprehensive performance of noise, vibration and harshness, and is a key indicator for measuring the quality of automobile manufacturing. NVH performance directly affects the driving experience of automobile users and is one of the key indicators for measuring the quality of automobile manufacturing; NVH performance is related to the user's comfort experience in daily driving and the safe transportation of goods. Therefore, it is crucial for automobile manufacturers and parts manufacturers to improve NVH performance.

[0069] In some embodiments of the present disclosure, a vehicle is provided, comprising an electric drive system.

[0070] As the core power source of the vehicle, the performance of the electric drive system is directly related to the driving experience, energy consumption level and service life of the whole vehicle. The electric drive system includes motors, electronic controls, reducers, etc. The motor is the core component of the electric drive system, and its main function is to convert electrical energy into mechanical energy or mechanical energy into electrical energy. The electronic control is the core control component in the electric drive system, which is mainly responsible for receiving instructions from the vehicle control unit (VCU), controlling the current, voltage and other parameters of the motor, so that the motor works in the required direction, speed, torque and response time; in addition, during the energy recovery process, the electronic control also plays the role of recharging the power battery. The reducer is an important transmission component in the electric drive system, and its main function is to convert the high-speed, low-torque output of the motor into a low-speed, high-torque output, thereby improving the starting force and traction of the car; at the same time, the reducer can also adjust the speed of the wheel to match the wheel speed with the vehicle speed, and reduce the load and wear of the motor.

[0071] During the operation of the motor, due to the action of electromagnetic force, radial and tangential electromagnetic force waves will be generated, causing periodic vibration of the stator and rotor; the elastic deformation of the balls and outer ring raceways of the motor bearings will produce vibration and noise during operation; friction noise may also be generated at the sliding connection between the brush and the slip ring or commutator.

[0072] Electronic components in the electronic control system may generate high-frequency electronic noise when working, which is usually transmitted through electromagnetic radiation or conduction.

[0073] The gears in the reducer will produce friction, vibration and collision during the meshing process, thereby generating noise; the bearings in the reducer may also generate periodic vibration and noise during operation.

[0074] In some embodiments of the present disclosure, Fig.10 As shown, an electric drive system is provided, including: a housing 3 and a vibration reduction and noise reduction object. The vibration reduction and noise reduction object is arranged inside the housing 3. The housing 3 includes a cover 31, and the cover 31 includes a vibration reduction and noise reduction structural member.

[0075] Exemplarily, the electric drive system includes a motor, an electronic control and a reducer.

[0076] Exemplarily, the housing 3 is, for example, the housing of the motor, the electric control and the reducer. The vibration and noise reduction object may be the part of the motor, the electric control or the reducer located in its housing 3.

[0077] Exemplarily, the cover 31 is, for example, an upper and lower cover plate of the electric control, and the upper and lower cover plates are part of the electric control housing.

[0078] Here, the vibration reduction and noise reduction structural member may be a part of the cover 31 or the entire cover 31 , or may be provided at any part of the cover 31 that requires vibration reduction and noise reduction in the vibration reduction and noise reduction object.

[0079] In a vehicle, in an electric drive system, for example, the above-mentioned motor, electronic control or reducer will generate complex vibration noise during operation due to various factors such as motor operation, gear meshing, bearing friction, etc. The vibration noise covers multiple frequency bands from low frequency to high frequency. The generated vibration noise will be transmitted to the housing 3, and the cover 31 on the housing 3 will generate radiation noise due to the vibration, thereby affecting the NVH performance of the vehicle.

[0080] At this time, the vibration reduction and noise reduction structural member on the cover 31 can play a role in reducing noise radiation. Therefore, for vibration noise in different frequency bands, the design of the vibration reduction and noise reduction structural member is very important.

[0081] In some implementations, the "acoustic black hole effect" provides a new approach and new ideas for vibration and noise reduction. Ideally, the propagation speed of sound waves through an acoustic black hole will be reduced to zero, so there will be no wave reflection, achieving efficient vibration and noise reduction. However, the existing acoustic black hole structure only dissipates the low-frequency noise transmitted to it, and cannot accurately absorb vibration noise in multiple frequency bands from low to high frequencies, so the effect of vibration and noise reduction is not good.

[0082] Based on this, some embodiments of the present application provide a vibration and noise reduction structural component. Figure 6As shown, the vibration reduction and noise reduction structural member includes: an acoustic black hole plate layer 10, and at least one cavity H is arranged inside the acoustic black hole plate layer 10. At least a part of the surface of the cavity H is a curved surface. The acoustic black hole plate layer 10 also includes at least one through-hole 140 penetrating the curved surface of the cavity H and the surface of the acoustic black hole plate layer 10, and the through-hole 140 is located at the minimum distance position between the curved surface of the cavity H and the surface of the acoustic black hole plate layer 10.

[0083] It can be understood that the perforation 140 penetrates the curved surface of the cavity H and the surface of the acoustic black hole slab 10. It can be understood that the perforation 140 not only penetrates the surface of the acoustic black hole slab 10, but also penetrates the curved surface of the cavity H, forming a passage from the outside of the acoustic black hole slab 10 to the inside of the cavity H. The perforation 140 is located at the minimum distance position between the curved surface of the cavity H and the surface of the acoustic black hole slab 10, which refers to the shortest distance from the surface of the acoustic black hole slab 10 to the curved surface of the cavity H, that is, the position where the curved surface is closest to the surface of the acoustic black hole slab 10. The curved surface of the cavity H helps to disperse the reflection direction of the sound wave, reduce the concentrated reflection of the sound wave, and thus reduce the vibration noise.

[0084] Here, the formation method of the cavity H is not limited.

[0085] At least one cavity H is arranged inside the acoustic black hole plate layer 10. By using the acoustic black hole effect, when the vibration noise enters the cavity H, it will gather inside the cavity, and the vibration noise will be reflected and scattered by the arc surface of the cavity H for many times, thereby increasing the interaction between the vibration noise and the cavity H, and then dissipating the energy of the sound wave, so that the energy of the vibration noise gathers and attenuates and dissipates along the arc surface of the cavity H, which can gradually dissipate the medium and low frequency sound waves, or even reduce them to zero, and no longer continue to propagate; at the same time, the perforation 140 has a sound absorption capacity, and after the medium and high frequency noise enters the cavity H through the perforation 140, it will gather inside the cavity H and attenuate and dissipate many times, which can reduce the propagation of medium and high frequency vibration noise. Moreover, due to the cavity H structure in the acoustic black hole plate layer 10, when the vibration excitation reaches the vibration reduction and noise reduction structural member, it plays a buffering role, which can reduce the vibration excitation; therefore, through the above-mentioned setting, the acoustic black hole plate layer 10 can accurately absorb the vibration noise of multiple frequency bands from low frequency to high frequency, and has a good vibration reduction and noise reduction effect. That is to say, the vibration-damping and noise-reducing structural component of the present application is not only suitable for low-frequency structural vibrations, but the cavity H forms a Helmholtz resonator that can absorb medium and high-frequency noise, and the frequency coverage is more sufficient.

[0086] In some embodiments, the acoustic black hole slab layer 10 includes a first groove plate 100 and a second groove plate 200 .

[0087] The first groove plate 100 includes: a first surface 110, a second surface 120 and at least one first groove 130. The first surface 110 and the second surface 120 are arranged opposite to each other. The opening of the first groove 130 faces the first surface 110. It can be understood that the first surface 110 of the first groove plate 100 is recessed inwardly to form the first groove 130. It should be noted that after the first groove 130 is formed, the first surface 110 of the first groove plate 100 only includes a portion that is not recessed inwardly.

[0088] The second groove plate 200 includes: a third surface 210, a fourth surface 220 and at least one second groove 230. The third surface 210 and the fourth surface 220 are arranged opposite to each other. The opening of the second groove 230 faces the third surface 210. It can be understood that the third surface 210 of the second groove plate 200 is recessed inwardly to form the second groove 230. It should be noted that after the second groove 230 is formed, the third surface 210 of the second groove plate 200 only includes a portion that is not recessed inwardly.

[0089] The first surface 110 and the third surface 210 are disposed opposite to each other and connected, at least one first groove 130 and at least one second groove 230 are disposed correspondingly, and the corresponding first groove 130 and second groove 230 form a cavity H, such as Figure 6 The part shown in the dotted box.

[0090] The first groove 130 has a first arc surface 131 , and the second groove 230 has a second arc surface 231 .

[0091] In some examples, the first groove 130 is a semi-cylindrical groove. The first groove 130 further includes two planes that are opposite to each other, and the first arc surface 131 is connected between the two planes.

[0092] In some examples, the second groove 230 is a semi-cylindrical groove, and the second groove 230 further includes two planes arranged opposite to each other, and the second arc surface 231 is connected between the two planes.

[0093] At least one through hole 140 is disposed in the middle area of ​​the first groove 130, and the extension direction AA of the middle area of ​​the first groove 130 is consistent with the extension direction AA of the first groove 130. The middle area of ​​the first groove 130 corresponds to the relatively thinnest area of ​​the first groove plate 100, and corresponds to the relatively most concave position of the first groove 130.

[0094] Here, the formation method of the first groove 130 and the second groove 230 is not limited, and any method that can form a groove can be used, for example, any of machining, stamping, injection molding, laser cutting, laser engraving, electrolytic machining, ultrasonic machining and other special processing methods.

[0095] By respectively setting grooves in the first groove plate 100 and the second groove plate 200, the first groove plate 100 and the second groove plate 200 form a cavity H, and the acoustic black hole effect can be used to make the cavity H also play a role, which can make the energy of the vibration noise gather, decay and dissipate along the first arc surface 131 and the second arc surface 231, and the medium and low frequency sound waves gradually dissipate, or even drop to zero, and no longer continue to propagate; at the same time, the perforation 140 on the middle area of ​​the first groove 130 can reduce the propagation of medium and high frequency vibration noise. And the cavity H structure plays a buffering role, which can reduce vibration excitation; therefore, through the above-mentioned setting, not only can the vibration noise of multiple frequency bands from low frequency to high frequency be accurately absorbed, and it has a good effect of vibration reduction and noise reduction, but also the acoustic black hole plate layer 10 can be more convenient to process and reduce the difficulty of processing.

[0096] In some embodiments, Figure 1 As shown, along the first designated direction X1, the distance between the first arc surface 131 and the second surface 120 decreases in a power law, and the first designated direction X1 is a direction from the edge of the first arc surface 131 to the center, and the first designated direction is perpendicular to the extension direction of the first groove 130. Figure 4 As shown, along the second specified direction X2, the distance between the second arc surface 231 and the fourth surface 220 decreases exponentially, and the second specified direction X2 is the direction pointing from the edge of the second arc surface 231 to the center, and the second specified direction is perpendicular to the extension direction of the second groove 230.

[0097] The above arrangement, that is, when the vibration noise is transmitted to the first curved surface 131 and the second curved surface 231, since the curvature of the first curved surface 131 and the curvature of the second curved surface 231 change in a power law, the vibration noise in multiple frequency bands from low frequency to high frequency can be more effectively gathered and absorbed by the cavity H, thereby further improving the vibration reduction and noise reduction effect of the acoustic black hole plate layer 10.

[0098] In some embodiments, Figure 6 As shown, the dimension D of the first groove plate 100 along the first direction Y is equal to the dimension D of the second groove plate 200 along the first direction Y at the same position in the first direction Y. The first direction Y is perpendicular to the second surface 120 .

[0099] For example, position C of the first groove plate 100 and position B of the second groove plate 200 are at the same position in the first direction Y, and the dimension D1 at position C of the first groove plate 100 along the first direction Y is equal to the dimension D1 at position B of the second groove plate 200 along the first direction Y.

[0100] Through the above-mentioned setting, the symmetry and consistency of the cavity H can be ensured, so that the propagation path and reflection mode of the vibration noise in the cavity H are consistent, and the vibration noise scattering and energy loss are also consistent, thereby improving the sound absorption effect of the cavity H, and further improving the vibration reduction and noise reduction effect of the cavity H.

[0101] In some examples, such as Figure 6 As shown, position C of the first groove plate 100 and position B of the second groove plate 200 are at the same position in the first direction Y, and the dimension D1 at position C of the first groove plate 100 along the first direction Y may not be equal to the dimension D1 at position B of the second groove plate 200 along the first direction Y. At this time, the cavity H does not have symmetry and consistency, so that the propagation path and reflection mode of the vibration noise in the cavity H are diverse, and the scattering and energy loss of the vibration noise in the cavity H are also diverse, which can also achieve the effect of vibration reduction and noise reduction.

[0102] In some embodiments, Figure 3 and Figure 7 As shown, the first surface 110 of the first groove plate 100 has a plurality of first grooves 130, and the plurality of first grooves 130 are arranged at intervals and arranged along the second direction X. Figure 5 and Figure 8 As shown, the third surface 210 of the second groove plate 200 has a plurality of second grooves 230 , and the plurality of second grooves 230 are arranged at intervals along the second direction X. The second direction X is perpendicular to the extension direction of the first grooves 130 .

[0103] It should be noted that Figure 7 is a diagram from the perspective of the opening direction of the first groove 130 in the first groove plate 100, Figure 8 The figure is a view from the opening direction of the second groove 230 in the second groove plate 200.

[0104] Exemplarily, the number of the plurality of first grooves 130 may be 2, 3, 4 or 5, etc., which is not limited here and can be set according to actual needs.

[0105] Here, the size and specification of each first groove 130 of the plurality of first grooves 130 may be the same or different, and there is no limitation on this, and the size and specification may be set according to actual needs.

[0106] Exemplarily, the number of the plurality of second grooves 230 may be 2, 3, 4 or 5, etc., which is not limited here and can be set according to actual needs.

[0107] Here, the size and specification of each of the plurality of second grooves 230 may be the same or different, and there is no limitation here, and the size and specification may be set according to actual needs.

[0108] That is to say, the arrangement of the plurality of first grooves 130 and the plurality of second grooves 230 can form a plurality of cavities H, and the size and specification of each of the plurality of cavities H can be the same or different.

[0109] Through the above-mentioned setting, a cavity H array is formed in the acoustic black hole plate layer 10. Multiple cavities H can provide a larger sound absorption area and a more complex sound wave propagation path, so that vibration noise in multiple frequency bands from low frequency to high frequency can be more effectively absorbed and dissipated, which can further improve the vibration reduction and noise reduction effect of the acoustic black hole plate layer 10.

[0110] The following describes in detail the size, shape, etc. of the first groove plate 100 and the second groove plate 200. The first groove plate 100 is configured the same as the second groove plate 200, and the following describes the first groove plate 100 as an example.

[0111] like Fig. 9 As shown, the dimension y of the first groove plate 100 along the first direction Y and the dimension x of the first groove 130 along the second direction X can be obtained by the following formula (1):

[0112]

[0113] Wherein m≥2, ε is the curvature of the first curved surface 131, L is the dimension of the second surface 120 along the second direction X, ydown is the distance between the middle area of ​​the first curved surface 131 and the second surface 120, lABH is the dimension of the projection of the first curved surface 131 on the second surface 120 along the second direction X, and yall is the distance between the first surface 110 and the second surface 120.

[0114] The above formula can be used to accurately obtain the sizes of the first groove 130 and the first curved surface 131 in the first groove plate 100. The second groove 230 and the second curved surface 231 in the second groove plate 200 can also be obtained by the above settings.

[0115] In some embodiments, Figure 2 , Figure 3 and Figure 7 As shown, a plurality of through holes 140 are disposed in the middle region of the first groove 130 , and the plurality of through holes 140 are sequentially arranged along the extension direction of the first groove 130 .

[0116] It is worth noting that the sizes of the plurality of through holes 140 may be the same or different; that is, the sizes of the plurality of through holes 140 are not limited and may be set according to actual needs.

[0117] Through the above arrangement, the multiple perforations can absorb more medium and high frequency vibration noise, and can further increase the interaction between the vibration noise and the first curved surface 131 and the second curved surface 231, so that the vibration noise is reflected and scattered multiple times in the cavity H, consuming the vibration noise energy, and further improving the vibration reduction and noise reduction effect of the acoustic black hole plate layer 10. Moreover, compared with a single or identical perforation 140 that can only have a good sound absorption effect within a specific frequency range, perforations of different sizes have different sound absorption characteristics for vibration noise of different frequencies. Multiple perforations 140 of different sizes can also form a wide-band sound absorption structure, which can further improve the vibration reduction and noise reduction effect of the acoustic black hole plate layer 10.

[0118] The size setting of the perforation 140 is described in detail below. According to the micro-perforated plate theory, the sound absorption coefficient α of the perforation 140 can be expressed as the following relation (2):

[0119] α=1-|r1| 2 , (2);

[0120] According to the vibration condition of the particle sound pressure in the perforated sound absorbing structure 140, the relationship between the acoustic impedance Z and the acoustic load reflection coefficient r1 can be expressed as the following equation (3):

[0121]

[0122] Where ρ is the air density, c is the speed of sound, and substituting the acoustic impedance Z and the acoustic load reflection coefficient r1 into equation (2), we can obtain the following equation (4):

[0123]

[0124] Wherein, R is the radius of the small hole, ω is the angular frequency, M is the acoustic mass, and D is the distance between the first groove 130 and the second groove 230. The relational equation (5) of the relative acoustic impedance r' and the relational equation (6) of the relative acoustic mass m' are respectively:

[0125]

[0126] Substituting the relational equation (5) of the relative acoustic impedance r' and the relational equation (6) of the relative acoustic mass m' into the above relational equation (4), the sound absorption coefficient of the through hole 140 can be obtained as follows:

[0127]

[0128] It is known that the relative acoustic impedance r', the relative acoustic mass m', the aperture d of the micro-perforation 140, and the frequency f of the vibration noise to be absorbed satisfy the following relationships (8), (9), (10), (11), and (12):

[0129]

[0130] Wherein, m is the acoustic mass, mm is the acoustic mass constant, mr is the acoustic resistance constant, t is the size of the middle area of ​​the first groove 130 along the first direction Y, and μ is the kinematic viscosity coefficient.

[0131] Substituting the known sound speed and equations (8), (9), (10), (11), and (12) into equation (7), we can obtain the equation (13) for the sound absorption coefficient α of the perforation 140, the frequency f of the vibration noise to be absorbed, the opening ratio p of the perforation 140 (i.e., the ratio of the total area of ​​the perforation 140 to the area of ​​the first groove 130), and the aperture d of the perforation 140:

[0132]

[0133] It is known that the speed of sound c = 340m / s, the kinematic viscosity μ = 1.56*10-5m2 / s, and the size t of the middle area of ​​the first groove 130 along the first direction Y, the relationship between the sound absorption coefficient α, the frequency f of the vibration noise, the porosity p, and the aperture d can be obtained according to the relationship (13). Among them, the sound absorption coefficient α and the frequency f of the vibration noise are the effects to be obtained, that is, the frequency f of the vibration noise is known, and the sound absorption coefficient α is the known effect to be achieved (with a value of 0 to 1). Therefore, the relationship (13) is the relationship between the porosity p and the aperture d. According to the actual application of the allowable porosity of the vibration reduction and noise reduction structural member of this application, the matching aperture can be calculated.

[0134] The structural setting parameters of the through hole 140, namely, the opening ratio p and the aperture d, can be accurately obtained through the above formula.

[0135] In some embodiments, the diameter of the through hole 140 is less than or equal to 1 mm.

[0136] For example, the diameter of the through hole 140 may be 0.1 mm, 0.3 mm, 0.5 mm, 0.7 mm, or 1 mm, etc., which is not limited here.

[0137] It can be understood that when the diameter of the perforation 140 is less than 1 mm, a wide-band absorption effect can be obtained; when the diameter of the perforation 140 is equal to 0.1 mm, the frequency of the absorbed vibration noise can reach several thousand GHz. In this way, the acoustic black hole plate layer 10 can have a good vibration reduction and noise reduction effect in multiple frequency bands from low frequency to high frequency.

[0138] In some embodiments, Figures 4 to 6 As shown, the fourth surface 220 of the second groove plate 200 is provided with a damping material 240 , and the damping material 240 is correspondingly arranged in the middle area of ​​the second groove 230 , and the extension direction of the middle area of ​​the second groove 230 is consistent with the extension direction of the second groove 230 .

[0139] Through the above-mentioned arrangement, when the vibration noise gathers in the cavity H and gradually reaches the middle area of ​​the second groove 230, most of the vibration noise is attenuated and dissipated, but a part of the vibration noise that has not been completely dissipated remains. The damping material 240 is arranged correspondingly in the middle area of ​​the second groove 230, which can effectively absorb this part of the vibration noise that has not been completely dissipated, and can further improve the vibration reduction and noise reduction effect of the acoustic black hole plate layer 10.

[0140] In some embodiments, Figure 6-7 As shown, the vibration reduction and noise reduction structural component also includes: a connecting layer 20, which is arranged between the first groove plate 100 and the second groove plate 200, and connected to the first surface 110 of the first groove plate 100 and the third surface 210 of the second groove plate 200.

[0141] Exemplarily, the connection layer 20 may be connected using damping glue.

[0142] The setting of the above-mentioned connecting layer 20 can make the entire acoustic black hole plate layer 10 except the perforation 140 in a sealed state, increase the structural stability of the acoustic black hole plate layer 10, and reduce the possibility of loosening of the first groove plate 100 and the second groove plate 200 when the vibration excitation is transmitted to the acoustic black hole plate layer 10, thereby improving the vibration reduction effect; in addition, when damping glue is used for connection, the damping glue can absorb medium and low frequency vibration noise, which can further improve the vibration reduction and noise reduction effect of the acoustic black hole plate layer 10.

[0143] In some embodiments, Figure 7 As shown, the distance between the opening boundary of the first groove 130 closest to the boundary of the first surface 110 and the boundary of the first surface 110 is greater than the set distance. Figure 8 As shown, a distance E between an opening boundary of the second groove 230 closest to the boundary of the third surface 210 in at least one second groove 230 and the boundary of the third surface 210 is greater than a set distance.

[0144] For example, Figure 7 Taking the example that the first groove plate 100 includes five first grooves 130, the first groove 130 closest to the boundary of the first surface 110 among at least one first groove 130 is the first first groove 130 and the fifth first groove 130, wherein the distance E between the first first groove 130 and the left boundary of the first surface 110 is greater than the set distance, and the distance E between the first first groove 130 and the upper boundary of the first surface 110 is greater than the set distance. The distance between the fifth first groove 130 and the boundary of the first surface 110 can refer to the above description and will not be repeated here.

[0145] For example, Figure 8Taking the example that the second groove plate 200 includes five second grooves 230, the second grooves 230 closest to the boundary of the third surface 210 among at least one second groove 230 are the first second groove 230 and the fifth second groove 230, wherein the distance E between the first second groove 230 and the left boundary of the third surface 210 is greater than the set distance, and the distance E between the upper boundaries of the first second groove 230 is greater than the set distance. The distance between the fifth second groove 230 and the boundary of the third surface 210 can refer to the above description and will not be repeated here.

[0146] Exemplarily, a distance E between an opening boundary of at least one first groove 130 closest to the boundary of the first surface 110 and the boundary of the first surface 110 may be 5 mm, 6 mm, 7 mm, 8 mm or 9 mm, etc., which is not limited here.

[0147] Exemplarily, a distance E between an opening boundary of at least one second groove 230 closest to the boundary of the third surface 210 and the boundary of the third surface 210 may be 5 mm, 6 mm, 7 mm, 8 mm or 9 mm, etc., which is not limited here.

[0148] The above arrangement can reserve a part of the boundary area of ​​the acoustic black hole plate layer 10 to facilitate the connection between the vibration reduction and noise reduction structural parts and other components (for example, components in the vehicle electric drive system, which may be electrodes, electronic controls or reducers, etc.), for example, other components are connected to the boundary area of ​​the acoustic black hole plate layer 10. The connection method is, for example, screw fixing and sealing, for example, screw holes are set in the boundary area of ​​the acoustic black hole plate layer 10, and screws are passed through the screw holes to achieve fixation with other components.

[0149] In some embodiments, Figure 6 to Figure 8 As shown, the vibration reduction and noise reduction structural component further includes: a filling layer 30, which is arranged in the cavity H.

[0150] Exemplarily, the filling layer 30 may be a sound absorbing material or a damping material having a sound absorbing effect.

[0151] When the vibration noise enters the cavity and encounters the filling layer 30, the vibration excitation and the vibration noise can be absorbed by the filling layer, which can reduce the reflection and propagation of the vibration noise. Through the above arrangement, the vibration reduction and noise reduction effect of the vibration reduction and noise reduction structural component can be improved.

[0152] In some embodiments, the material of the filling layer 30 includes: sound-absorbing cotton.

[0153] The sound-absorbing cotton is porous, and has a large number of small holes and gaps inside, which can cause viscosity and friction when vibration excitation and vibration noise propagate in it, enhance the dissipation effect, and further improve the vibration and noise reduction effect of the vibration and noise reduction structural parts.

[0154] In some embodiments, the material of the acoustic black hole plate layer 10 includes: Al—Si—Cu alloy material.

[0155] Al-Si-Cu alloy material (ADC12) aluminum alloy has good mechanical properties, including high tensile strength and yield strength, as well as certain toughness and hardness, so that the acoustic black hole plate layer 10 made of ADC12 aluminum alloy can withstand large loads and impacts, ensuring its stability and reliability in complex working environments.

[0156] Regarding the application of the vibration reduction and noise reduction structural parts in any of the above embodiments in vehicles, for new energy vehicles, the battery has occupied most of the chassis space. In order to reduce the noise of the electric drive system, it is already very difficult to reserve acoustic packaging space. Therefore, it is necessary to achieve vibration reduction and noise reduction of the electric drive system without changing the spatial layout or with very small changes in the spatial layout. Based on the components of the electric drive system itself, the vibration reduction and noise reduction structural parts in any of the above embodiments can be used in the cover 31 of the electric drive system housing 3 to achieve the purpose of vibration reduction and noise reduction. At the same time, when processing the acoustic black hole layer 10 of the vibration reduction and noise reduction structural parts, part of the material is removed, and the cross-sectional area is reduced by about two-thirds. In theory, a single component can reduce weight by 60%, achieving lightweight cover 31.

[0157] Moreover, the cover 31 itself also has the functions of dustproof and electromagnetic shielding. When the vibration-damping and noise-reducing structural component in any of the above-mentioned embodiments is used in the cover 31, since the vibration-damping and noise-reducing structural component is a complete plate-like structure, it will not affect the dustproof and electromagnetic shielding functions of the cover 31.

[0158] In some embodiments, the vibration reduction and noise reduction structural member includes an acoustic black hole plate layer 10. The acoustic black hole plate layer 10 includes: a first groove plate 100 and a second groove plate 200. The first groove plate 100 is closer to the vibration reduction and noise reduction object than the second groove plate 200.

[0159] Here, the vibration and noise reduction object is, for example, at least one of the aforementioned motor, electronic control and reducer.

[0160] Through the above arrangement, the perforation 140 on the first groove plate 100 can be made closer to the vibration and noise reduction object. In this way, the medium and high frequency vibration noise generated by the vibration and noise reduction object 2 can enter the cavity H more effectively through the sound absorption effect of the perforation 140, be gathered and attenuated and dissipated multiple times, thereby improving the vibration and noise reduction effect of the electric drive system.

[0161] It should be noted that the vibration reduction and noise reduction structural parts of the present application can be applied not only to the parts of the vehicle that need vibration reduction and noise reduction, but also to other parts that need vibration reduction and noise reduction. For example, high-rise buildings, bridges, tunnels and other structures will generate vibration and noise under external excitations such as wind loads and vehicle driving. By installing vibration reduction and noise reduction structural parts at key parts of the structure, the transmission of vibration and noise can be reduced, and the comfort and safety of the structure can be improved. For example, in the field of aerospace, vibration reduction and noise reduction structural parts can be applied to the fuselage, engine compartment, cabin interior and other parts of aircraft such as aircraft and rockets to reduce the impact of vibration and noise on crew members and passengers, while protecting the key components of the aircraft from vibration damage. And, in the field of shipbuilding and marine engineering, vibration reduction and noise reduction structural parts can be applied to the hull structure, engine compartment and other parts of the ship to reduce the transmission of vibration and noise, while protecting the key components of the ship from vibration damage.

[0162] In addition, vibration-damping and noise-reducing structural parts can also be used in household appliances such as refrigerators, washing machines, air conditioners and other equipment to reduce the noise and vibration generated during equipment operation and enhance the user experience.

[0163] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A vibration and noise reduction structural component, characterized in that: include: Acoustic black hole slab (10); At least one cavity (H) is arranged inside the acoustic black hole slab (10); at least a portion of the surface of the cavity (H) is a curved surface; the acoustic black hole slab (10) further comprises at least one through-hole (140) penetrating the curved surface of the cavity (H) and the surface of the acoustic black hole slab (10), and the through-hole (140) is located at the minimum distance position between the curved surface of the cavity (H) and the surface of the acoustic black hole slab (10).

2. The vibration and noise reduction structural component according to claim 1, characterized in that: The acoustic black hole plate layer (10) comprises: a first groove plate (100) and a second groove plate (200); The first groove plate (100) comprises: a first surface (110), a second surface (120) and at least one first groove (130); the first surface (110) and the second surface (120) are arranged opposite to each other; the opening of the first groove (130) faces the first surface (110); The second groove plate (200) comprises: a third surface (210), a fourth surface (220) and at least one second groove (230); the third surface (210) and the fourth surface (220) are arranged opposite to each other; the opening of the second groove (230) faces the third surface (210); The first surface (110) and the third surface (210) are arranged opposite to each other and connected, the at least one first groove (130) and the at least one second groove (230) are arranged correspondingly, and the corresponding first groove (130) and the second groove (230) form the cavity (H); The first groove (130) has a first curved surface (131), the second groove (230) has a second curved surface (231), the middle area of ​​the first groove (130) is provided with the at least one through hole (140), and the extension direction of the middle area of ​​the first groove (130) is consistent with the extension direction of the first groove (130).

3. The vibration and noise reduction structural member according to claim 2, characterized in that: Along a first specified direction (X1), the distance between the first arc surface (131) and the second surface (120) decreases in a power law, the first specified direction (X1) is a direction pointing from the edge of the first arc surface (131) to the center, and the first specified direction (X1) is perpendicular to the extension direction of the first groove (130); Along a second specified direction (X2), the distance between the second arc surface (231) and the fourth surface (220) decreases according to a power law, and the second specified direction (X2) is a direction pointing from the edge of the second arc surface (231) to the center, and the second specified direction (X2) is perpendicular to the extension direction of the second groove (230).

4. The vibration and noise reduction structural member according to claim 3, characterized in that: The dimension of the first groove plate (100) along the first direction (Y) is equal to the dimension of the second groove plate (200) along the first direction (Y) at the same position in the first direction (Y); the first direction (Y) is perpendicular to the second surface (120).

5. The vibration and noise reduction structural member according to any one of claims 2 to 4, characterized in that: The first surface (110) of the first groove plate (100) has a plurality of first grooves (130), and the plurality of first grooves (130) are arranged at intervals and arranged along a second direction (X); The third surface (210) of the second groove plate (200) has a plurality of second grooves (230), and the plurality of second grooves (230) are arranged at intervals and arranged along a second direction (X); The second direction (X) is perpendicular to the extension direction of the first groove (130).

6. The vibration and noise reduction structural member according to claim 5, characterized in that: A plurality of through holes (140) are provided in a middle region of the first groove (130), and the plurality of through holes (140) are arranged in sequence along an extension direction of the first groove (130).

7. The vibration and noise reduction structural member according to claim 6, characterized in that: The diameter of the perforation (140) is less than or equal to 1 mm.

8. The vibration and noise reduction structural member according to claim 2, characterized in that: The fourth surface (220) of the second groove plate (200) is provided with a damping material, and the damping material is arranged correspondingly in the middle area of ​​the second groove (230), and the extension direction of the middle area of ​​the second groove (230) is consistent with the extension direction of the second groove (230).

9. The vibration and noise reduction structural member according to claim 2, characterized in that: Also includes: A connecting layer (20) is provided between the first groove plate (100) and the second groove plate (200), and is connected to the first surface (110) of the first groove plate (100) and the third surface (210) of the second groove plate (200).

10. The vibration and noise reduction structural member according to claim 2, characterized in that: The distance between the opening boundary of the first groove (130) closest to the boundary of the first surface (110) among the at least one first groove (130) and the boundary of the first surface (110) is greater than a set distance; The distance between the opening boundary of the second groove (230) closest to the boundary of the third surface (210) among the at least one second groove (230) and the boundary of the third surface (210) is greater than the set distance.

11. The vibration and noise reduction structural member according to claim 10, characterized in that: Also includes: A filling layer (30) is arranged in the cavity (H).

12. The vibration and noise reduction structural member according to claim 11, characterized in that: The material of the filling layer (30) includes: sound-absorbing cotton.

13. The vibration and noise reduction structural member according to claim 2, characterized in that: The material of the acoustic black hole plate layer (10) includes: Al-Si-Cu alloy material.

14. An electric drive system, characterized in that: include: Shell (3), vibration and noise reduction object; The housing (3) comprises: a cover (31); the cover (31) comprises the vibration reduction and noise reduction structural member according to any one of claims 1 to 13; The vibration and noise reduction object is arranged inside the shell (3).

15. The electric drive system according to claim 14, characterized in that: The vibration reduction and noise reduction structural component comprises an acoustic black hole plate layer (10); the first groove plate (100) is closer to the vibration reduction and noise reduction object than the second groove plate (200).

16. A vehicle, characterized in that: include: An electric drive system as claimed in claim 14 or 15.

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