Trunk cover plate of vehicle and vehicle

Abstract

The utility model discloses a trunk cover plate of a vehicle and the vehicle, the trunk cover plate comprises a base layer; the filling layer is arranged in the base layer; wherein the base layer sinks towards the inside of the base layer to form a resonant cavity, the resonant cavity comprises an opening part and a cavity part, the opening part is communicated with the outside so as to be used for absorbing noise, the cavity part is communicated with the opening part, and the maximum sectional area of the opening part is smaller than that of the cavity part. Therefore, through the arrangement of the trunk cover plate, resonance can be generated through the resonant cavity and the noise with the specific frequency to achieve the effect of consuming noise energy, so that the coupling noise of the rear row of the vehicle is reduced, and then the riding comfort of a driver and passengers is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a trunk cover of a vehicle and a vehicle. Background Art

[0002] With the gradual increase of intelligent configurations of vehicle models, people's requirements for the quietness of the rear row of vehicles are becoming more and more strict. However, with the gradual improvement of intelligent configurations, a large number of electrical components and control units are also arranged in the trunk of the vehicle. Some of these electrical components will generate electromagnetic noise during operation. During the high-speed driving of the vehicle, the existence of the rear axle will also bring motor noise. The motor noise and the electromagnetic noise of the electrical components will be coupled to generate an uncomfortable noise environment.

[0003] In the related art, during the high-speed driving of the vehicle, only a part of the motor noise can be isolated through the trunk carpet, but the electromagnetic noise of the electrical components cannot be effectively isolated. Although the trunk carpet can reduce the motor noise to a certain extent, the transmitted motor noise and electrical thermal noise will still be transmitted to the rear row passengers. In the noise propagation path, only a layer of trunk cover is used for partition, mainly non-woven fabric plus PHC board, and the sound absorption and insulation performance is poor. Obviously, an effective sound insulation effect cannot be achieved. Therefore, how to improve the sound absorption and insulation performance of the trunk cover becomes particularly important. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a trunk cover of a vehicle and a vehicle, which can resonate with noise at a specific frequency through a resonance cavity to achieve the effect of consuming noise energy, thereby reducing the coupled noise in the rear row of the vehicle.

[0005] The utility model further provides a vehicle.

[0006] The trunk cover of the vehicle according to the first aspect of the utility model includes: a base layer; a filling layer disposed within the base layer; wherein, a resonance cavity is recessed towards the interior of the base layer, the resonance cavity includes an opening portion and a cavity portion, the opening portion is communicated with the outside for absorbing noise, the cavity portion is communicated with the opening portion, and the maximum cross-sectional area of the opening portion is smaller than the maximum cross-sectional area of the cavity portion.

[0007] It is understandable that when the resonance cavity is externally excited (such as the vibration energy of noise), if the excitation frequency matches the natural frequency of the resonance cavity, the resonance cavity will resonate with the noise. In the resonance state, the response amplitude of the resonance cavity will increase, and in the resonance state, the resonance cavity will convert mechanical energy into heat energy through internal friction, material deformation, etc., thereby consuming the externally input energy. In summary, the embodiments in this case utilize the resonance effect generated by the resonance cavity to convert the air vibration energy of the received external sound wave into internal heat energy of itself, thereby achieving the effect of consuming noise energy and reducing noise.

[0008] Thus, by setting the trunk lid, resonance can be generated between the resonance cavity and the noise at a specific frequency to achieve the effect of consuming noise energy, thereby reducing the coupled noise in the rear row of the vehicle and further improving the riding comfort of the driver and passengers.

[0009] In some examples of the present utility model, the cross-sectional areas at various parts of the opening are the same; and / or the cross-sectional area of the cavity part decreases in the direction away from the opening or first remains unchanged and then decreases.

[0010] In some examples of the present utility model, in the thickness direction of the base layer, the height of the resonance cavity is H1, and the thickness of the base layer is H2, and H1 and H2 satisfy the relationship: H1 > 0.5H2.

[0011] In some examples of the present utility model, the base layer is configured as a fiberglass board.

[0012] In some examples of the present utility model, the filling layer includes: a sound-absorbing layer, which is arranged at the bottom inside the base layer; a foaming layer, which is arranged above the sound-absorbing layer along the thickness direction of the base layer.

[0013] In some examples of the present utility model, the filling layer further includes: a rubber layer, which is arranged between the sound-absorbing layer and the foaming layer, and the rubber layer includes a plurality of rubber particles to form resonance with noise at a specific frequency.

[0014] In some examples of the present utility model, the sound-absorbing layer is configured as flexible sound-absorbing cotton.

[0015] In some examples of the present utility model, the trunk lid of the vehicle further includes: a support column, which is connected between the upper surface and the lower surface of the base layer along the thickness direction of the base layer; and / or in the direction perpendicular to the thickness direction of the base layer, the support column is arranged between adjacent resonance cavities.

[0016] In some examples of the present utility model, the support column is configured as a cylindrical shape; and / or the support column is provided with a plurality of sound-absorbing holes distributed at intervals along the circumferential direction.

[0017] A vehicle according to the second aspect of the present utility model includes: the trunk lid of the above-mentioned vehicle.

[0018] The additional aspects and advantages of the present utility model will be partly given in the following description, partly become apparent from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0019] The above-mentioned and / or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0020] Figure 1 is a sectional view of the trunk lid according to an embodiment of the present utility model;

[0021] Figure 2 is a schematic structural view of the support column according to an embodiment of the present utility model.

[0022] Reference Signs:

[0023] 100, trunk lid;

[0024] 1, base layer; 11, resonance cavity; 111, opening part; 112, cavity part;

[0025] 2, filling layer; 21, sound-absorbing layer; 22, foaming layer; 23, rubber layer;

[0026] 3, support column; 31, sound-absorbing holes. Detailed Description of the Embodiments

[0027] The embodiments of the present utility model will be described in detail below. The embodiments described with reference to the drawings are exemplary.

[0028] Reference will be made below to Figure 1 - Figure 2 Describe the trunk lid 100 of the vehicle according to an embodiment of the present utility model, which can resonate with the resonance cavity 11 and specific frequency noise to achieve the effect of consuming noise energy, thereby reducing the coupled noise in the rear row of the vehicle.

[0029] In conjunction with Figure 1 - Figure 2As shown, the trunk cover 100 of the vehicle according to the first embodiment of the utility model comprises a base layer 1 and a filling layer 2. The base layer 1 is mainly used as a support carrier of the trunk cover 100, so as to maintain the shape and structural integrity of the trunk cover 100; the filling layer 2 can be filled inside the base layer 1, which can increase the structural strength of the base layer 1, absorb sound and reduce noise, reduce shock and buffer, and insulate heat according to design requirements, thereby improving the practicality and reliability of the trunk cover 100; and the multi-layer composite trunk cover 100 can effectively buffer the impact force of the outside world, such as encountering collisions, bumps, etc. during transportation or use, and can protect the items in the trunk from damage, thereby improving the safety of the trunk.

[0030] Specifically, the filling layer 2 is arranged in the base layer 1, and the base layer 1 is recessed with a resonance cavity 11 toward the inside thereof, and the resonance cavity 11 includes an opening portion 111 and a cavity portion 112, the opening portion 111 is connected to the outside to absorb noise, and the cavity portion 112 is connected to the opening portion 111, and the maximum cross-sectional area of the opening portion 111 is smaller than the maximum cross-sectional area of the cavity portion 112. Among them, the maximum cross-sectional area of the opening portion 111 refers to the maximum cross-sectional area of the opening portion 111 obtained by cutting the opening portion 111 along a direction perpendicular to the thickness of the base layer 1, and the maximum cross-sectional area of the cavity portion 112 refers to the maximum cross-sectional area of the cavity portion 112 obtained by cutting the cavity portion 112 along a direction perpendicular to the thickness of the base layer 1.

[0031] It is understandable that the opening of the opening portion 111 is relatively small, and the sound wave energy can enter the larger cavity in the cavity portion 112 through the opening. Such an arrangement can make the resonance cavity 11 structure into a "small mouth and big belly" shape, so that the resonance cavity 11 structure can be close to the shape of the Helmholtz resonance cavity 11, so that the resonance cavity 11 and the sound wave energy of a specific frequency (that is, the frequency band that matches the natural frequency of the resonance cavity 11 itself) resonate, thereby converting the noise energy into internal energy for dissipation, thereby achieving a noise reduction effect. For example, when the resonance cavity 11 is subjected to external excitation (such as the vibration energy of the noise), if the excitation frequency matches the natural frequency of the resonance cavity 11, the resonance cavity 11 will resonate with the noise. In the resonant state, the response amplitude of the resonance cavity 11 will increase, and in the resonant state, the resonance cavity 11 will convert mechanical energy into heat energy through internal friction, material deformation, etc., thereby consuming the external input energy. In summary, the embodiment of the present case utilizes the resonance effect generated by the resonance cavity 11 to convert the air vibration energy of the received external sound waves into internal heat energy, thereby achieving the effect of consuming noise energy and reducing noise.

[0032] Furthermore, noise can enter the cavity portion 112 through the opening 111. The sound waves entering the cavity portion 112 will generate pressure fluctuations, and these pressure fluctuations will cause the air in the cavity to vibrate. When the vibration frequency of the sound waves matches the natural frequency of the resonance cavity 11, resonance will occur. At this time, the air vibration in the cavity will reach the maximum amplitude. Moreover, at the resonance frequency, the energy of the sound waves will be largely absorbed and converted into heat energy (since the sound waves will be repeatedly reflected in the cavity portion 112 after entering through the opening 111, resulting in the gradual dissipation of the sound wave energy), thereby achieving the effect of dissipating the noise energy and further improving the spatial quietness of the rear row of the vehicle.

[0033] For example, during the high-speed driving of the vehicle, the existence of the rear axle will bring motor noise, and the motor noise is coupled with the electromagnetic noise of the electrical components. The trunk lid 100 in this case can resonate with the coupled noise through the resonance cavity 11 to consume the sound wave energy of a specific frequency, thereby preventing the electromagnetic coupling noise from being transmitted to the rear passengers and further improving the spatial quietness of the rear row of the vehicle.

[0034] In particular, designers can select the appropriate internal volume shape of the cavity portion 112 and the opening size of the opening 111 according to the target noise frequency range to be absorbed.

[0035] Thus, by providing the trunk lid 100, resonance can be generated between the resonance cavity 11 and the noise of a specific frequency to achieve the effect of consuming the noise energy, thereby reducing the coupled noise in the rear row of the vehicle and further improving the riding comfort of the passengers.

[0036] According to some alternative embodiments of the present invention, in combination with Figure 1 As shown, the cross-sectional area of the cavity portion 112 decreases in the direction away from the opening 111. Among them, in the thickness direction of the base layer 1 (that is, Figure 1 the up and down direction shown), an arc transition section is connected between the opening 111 and the cavity portion 112. In this way, the stress can be more evenly transitioned, avoiding the problem of local stress concentration, thereby improving the structural stability of the base layer 1; the cross-sectional area of the cavity portion 112 gradually becomes smaller in the direction away from the opening 111. In this way, a Helmholtz resonance cavity 11 shape of "small mouth and big belly" can be constructed, so as to ensure that the resonance cavity 11 can smoothly resonate with the sound waves of a specific frequency, thereby achieving the effect of dissipating the sound wave energy. For example, the cavity portion 112 is constructed in a hemispherical shape or a bowl shape, etc., and is not limited thereto.

[0037] Optionally, the cross-sectional area of the cavity portion 112 remains unchanged first and then decreases in the direction away from the opening portion 111. Such an arrangement can also form a Helmholtz resonance cavity 11 with a shape of "small mouth and large belly", so as to ensure that the resonance cavity 11 can smoothly resonate with sound waves of a specific frequency, thereby achieving the effect of dissipating sound wave energy. For example, the cavity portion 112 is constructed to be close to a can shape, a teapot shape, etc., but not limited thereto.

[0038] Another option is that the cross-sectional area of the cavity portion 112 increases first and then decreases in the direction away from the opening portion 111. In this way, a Helmholtz resonance cavity 11 with a shape of "small mouth and large belly" can also be formed, so as to achieve the noise reduction effect. For example, the cavity portion 112 is constructed to be close to a spherical shape, but not limited thereto.

[0039] Another option is that the cross-sectional area of the cavity portion 112 remains unchanged in the direction away from the opening portion 111. In this way, a Helmholtz resonance cavity 11 with a shape of "small mouth and large belly" can also be formed, so as to achieve the noise reduction effect. For example, the cavity portion 112 is constructed in a cube shape, a regular polyhedron shape, etc., but not limited thereto.

[0040] According to some alternative embodiments of the present invention, in combination with Figure 1 As shown, in the thickness direction of the base layer 1, the height of the resonance cavity 11 is H1, and the thickness of the base layer 1 is H2. H1 and H2 satisfy the relationship: H1 > 0.5H2.

[0041] Among them, as described above, on the basis of satisfying the structural strength of the base layer 1 (that is, the base layer 1 will not overly weaken the structural strength of the luggage compartment cover 100 due to the opening of the resonance cavity 11), the cavity space inside the resonance cavity 11 can be increased as much as possible, so as to consume as much noise energy as possible, thereby improving the resonance noise reduction effect of the resonance cavity 11. In addition, the opening of the resonance cavity 11 is also beneficial to the lightweight design effect of the luggage compartment cover 100.

[0042] According to some alternative embodiments of the present invention, the base layer 1 is constructed as a fiberglass board. Among them, the fiberglass board is a board made of glass fibers and resin composites, which has high tensile strength and bending strength and can withstand large loads. The porous structure on the surface of the fiberglass board can also effectively absorb the sound wave energy in the air, reduce the propagation and reflection of noise, and compared with metal materials, it has a lower density and lighter weight, which is convenient for transportation and installation. In addition, the fiberglass board is convenient to be formed into a hard material by hot pressing with a mold. That is to say, such a design method of constructing the base layer 1 as a fiberglass board can ensure the structural reliability, sound absorption and noise reduction effect, and lightweight design effect of the base layer 1.

[0043] According to some alternative embodiments of the present invention, in combination with Figure 1As shown, the filling layer 2 includes a sound-absorbing layer 21 and a foaming layer 22. The sound-absorbing layer 21 is disposed at the bottom within the base layer 1, and along the thickness direction of the base layer 1, the foaming layer 22 is disposed above the sound-absorbing layer 21.

[0044] Specifically, along the thickness direction of the base layer 1, the sound-absorbing layer 21 and the foaming layer 22 within the base body are arranged in sequence from bottom to top. Both the sound-absorbing layer 21 and the foaming layer 22 can absorb noise energy, and such an arrangement can gradually weaken the noise energy in the transmission path of the noise from below the trunk lid 100 to above the trunk lid 100, thereby providing a quieter rear row space for the driver and passengers, and further improving the driving and riding comfort of users.

[0045] Among them, the main function of the sound-absorbing layer 21 (porous material) is to absorb sound wave energy, reduce the reflection and transmission of sound, and by absorbing noise, it can improve the acoustic quality of the rear row space of the vehicle and reduce echo and reverberation; the foaming layer 22 can provide good shock absorption and buffering effects, thereby reducing the transmission of impact and vibration; and the foaming material has a lower density, which helps to reduce the weight of the overall structure; and there are a large number of tiny pores inside the foaming layer 22, and these pores can absorb sound wave energy and convert it into heat energy, thereby reducing the reflection and transmission of sound.

[0046] In summary, by arranging the sound-absorbing layer 21 and the foaming layer 22 together, on the one hand, a good sound absorption and noise reduction effect can be obtained, and on the other hand, the trunk lid 100 also has the ability of shock absorption and buffering (that is, the foaming layer 22 can provide a certain degree of structural support for the trunk lid 100 to prevent it from deforming or being damaged during use), thereby improving the practicality and structural stability of the trunk lid 100.

[0047] Specifically, in combination with Figure 1 As shown, the filling layer 2 further includes a rubber layer 23. The rubber layer 23 is disposed between the sound-absorbing layer 21 and the foaming layer 22. The rubber layer 23 includes a plurality of rubber particles to form resonance with noise of a specific frequency.

[0048] It can be understood that when the frequency of the noise is close to or equal to the natural frequency of the rubber particles, the rubber particles will generate resonance. In the resonance state, the rubber particles can effectively absorb and dissipate the sound vibration energy (when the rubber particles resonate, they will convert mechanical energy into heat energy through internal friction and deformation. In this way, the vibration energy is dissipated instead of being transmitted to other parts), thereby effectively reducing the vibration amplitude of the trunk lid 100, and further enabling the rubber layer 23 to provide an efficient resonance noise reduction effect within a specific frequency range.

[0049] Among them, by designing particles of different sizes and shapes, coverage of different frequency ranges can be achieved, which is applicable to a variety of vibration sources. In this way, the rubber layer 23 can provide effective noise reduction effects in a wide frequency range. In addition, the rubber material has good durability and anti-aging properties, and can maintain a stable noise reduction effect during long-term use, thereby improving the practicability and service life of the luggage compartment cover 100.

[0050] Optionally, designers can target different frequency bands of noise and conduct targeted treatment on the selection of different layer materials, thereby improving the flexibility and pertinence of the sound absorption and noise reduction effects.

[0051] Furthermore, the sound absorption layer 21 is configured as flexible sound-absorbing cotton. Among them, the interior of the sound absorption layer 21 is usually in a porous and fluffy state, which can effectively absorb sound energy, reduce reflected sound, thereby achieving the effect of sound absorption and noise reduction, and further improving the quietness of the rear space of the vehicle.

[0052] In addition, due to its softness and compressibility, the flexible sound-absorbing cotton can be easily installed in spaces of various shapes and sizes, such as curved surfaces or irregular corners, thereby improving its installation flexibility and applicability. Moreover, the flexible sound-absorbing cotton usually has a small density, resulting in a light weight, which is convenient for transportation and installation.

[0053] According to some optional embodiments of the present invention, in combination with Figure 1 and Figure 2 as shown, the luggage compartment cover 100 further includes a support column 3. Along the thickness direction of the base layer 1, the support column 3 is connected between the upper surface and the lower surface of the base layer 1.

[0054] Specifically, along the thickness direction of the base layer 1, the support column 3 can play a role in structurally supporting the upper and lower surfaces inside the base layer 1, thereby improving the overall structural strength and bending and torsional stiffness of the luggage compartment cover 100, reducing the risk of bending deformation when it is subjected to external pressure or load, and also dispersing the load borne at the weak stress positions on the base layer 1, reducing the risk of local stress concentration on the base layer 1, and further improving the overall structural stability and durability of the cover.

[0055] Optionally, in the direction perpendicular to the thickness direction of the base layer 1, the support column 3 is arranged between adjacent resonance cavities 11. Since the structural strength of the base layer 1 near the resonance cavity 11 is relatively low, the area near the resonance cavity 11 is a weak stress area. With the above arrangement, without interfering with the normal resonance noise cancellation work of the resonance cavity 11, the structural strength and stiffness of the area near the resonance cavity 11 can be effectively enhanced through the support column 3, thereby reducing the risk of local deformation of the luggage compartment cover 100.

[0056] According to some alternative embodiments of the present utility model, the support column 3 is configured as a cylindrical shape. Among them, the mechanical properties of the cylindrical shape are the same in all directions on the outer circumference, and it evenly disperses the stress from all directions on the outer circumferential surface, reducing the risk of local stress concentration, thereby improving the stress uniformity and structural stability of the support column 3; moreover, the cylindrical support column 3 has a simple structure, so it is easier to achieve the effect of standardized manufacturing and processing.

[0057] Specifically, as shown in combination with Figure 1 and Figure 2 , a plurality of sound-absorbing holes 31 are arranged at intervals along the circumferential direction of the support column 3. Such an arrangement can enable the support column 3 to absorb the sound energy from different directions through the sound-absorbing holes 31 arranged at intervals on the outer circumferential surface while enhancing the structural strength of the trunk lid 100, reducing the reflected sound, and thus further improving the sound-absorbing and noise-reducing effect of the trunk lid 100.

[0058] The vehicle according to the second aspect embodiment of the present utility model includes the trunk lid 100 of the vehicle in the above embodiment. Thus, the vehicle with this trunk lid 100 can effectively perform sound-absorbing and noise-reducing processing on the electromagnetic coupling noise in the rear row, thereby improving the quietness of the rear row space during vehicle driving, enhancing the riding comfort of the passengers, and further improving the market competitiveness of the whole vehicle.

[0059] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0060] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "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 a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0061] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0062] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

[0063] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0064] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A trunk lid of a vehicle, characterized in that, Comprising: Base layer; Filling layer, the filling layer is arranged inside the base layer; Wherein, a resonance cavity is recessed towards the inside of the base layer, the resonance cavity includes an opening part and a cavity part, the opening part is communicated with the outside for absorbing noise, the cavity part is communicated with the opening part, and the maximum cross-sectional area of the opening part is smaller than the maximum cross-sectional area of the cavity part.

2. The trunk lid of the vehicle according to claim 1, characterized in that, The cross-sectional area of the cavity part decreases in the direction away from the opening part; or The cross-sectional area of the cavity part remains unchanged first and then decreases in the direction away from the opening part; or The cross-sectional area of the cavity part increases first and then decreases in the direction away from the opening part; or The cross-sectional area of the cavity part remains unchanged in the direction away from the opening part.

3. The trunk lid of the vehicle according to claim 1, characterized in that, In the thickness direction of the base layer, the height of the resonance cavity is H1, the thickness of the base layer is H2, and H1 and H2 satisfy the relationship: H1 > 0.5H2.

4. The trunk lid of the vehicle according to claim 1, characterized in that, The base layer is constructed as a fiberglass board.

5. The trunk lid of a vehicle according to claim 1, characterized in that, The filling layer includes: Sound-absorbing layer, the sound-absorbing layer is arranged at the bottom inside the base layer; Foaming layer, along the thickness direction of the base layer, the foaming layer is arranged above the sound-absorbing layer.

6. The trunk lid of the vehicle according to claim 5, characterized in that, The filling layer further includes: Rubber layer, the rubber layer is arranged between the sound-absorbing layer and the foaming layer, and the rubber layer includes a plurality of rubber particles.

7. The trunk lid of the vehicle according to claim 5, characterized in that, The sound-absorbing layer is constructed as flexible sound-absorbing cotton.

8. The trunk lid of the vehicle according to claim 1, characterized in that, Further comprising: Support columns, along the thickness direction of the base layer, the support columns are connected between the upper surface and the lower surface of the base layer; And / or In the direction perpendicular to the thickness direction of the base layer, the support columns are arranged between adjacent resonance cavities.

9. The trunk lid of a vehicle according to claim 8, characterized in that, The support columns are constructed as cylindrical; and / or The support columns are circumferentially provided with a plurality of spaced-apart sound-absorbing holes.

10. A vehicle, characterized in that, Comprising: The trunk lid of the vehicle according to any one of claims 1-9.

Images