Sound insulation device for a vehicle and vehicle

Abstract

This invention discloses a sound insulation device for vehicles and a vehicle. The invention relates to the field of sound insulation device technology. The sound insulation device is fitted to the sheet metal structure of the vehicle and includes: an outer layer structure forming a mounting groove with one open end; a partition structure disposed within the mounting groove and fixed to the bottom wall of the groove, extending along the depth direction of the groove; and a sound insulation structure filling the mounting groove and covering the partition structure. By placing the partition structure within the mounting groove of the outer layer structure and fixing it to the bottom wall of the groove, and extending the partition structure along the depth direction of the groove, noise can be blocked from traveling in a direction perpendicular to the depth direction of the groove. This prevents larger noises within the sound insulation device from propagating to smaller noise areas, avoiding sound leakage and further improving the sound insulation effect of the device.

Description

Technical Field

[0001] This invention relates to the field of sound insulation device technology, and in particular to a sound insulation device for vehicles and the vehicle itself. Background Technology

[0002] In related technologies, the front sound insulation device, as one of the three major components of automotive NVH interior, plays a crucial role in controlling the overall NVH performance of the vehicle. Its acoustic performance design and verification are an important part of the development of the vehicle's acoustic package. While existing sound insulation devices can provide zoned sound insulation, noise can still flow within the device after entering, causing significant noise to reach weaker areas and radiate outwards, thus reducing the device's sound insulation effectiveness. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a sound insulation device for vehicles that can block noise from spreading along a direction perpendicular to the depth of the mounting groove, thereby preventing larger noises within the sound insulation device from propagating to smaller noise areas, avoiding sound leakage, and further improving the sound insulation effect of the sound insulation device.

[0004] The present invention further proposes a sound insulation device for a vehicle as described above, and a vehicle thereof.

[0005] According to an embodiment of the present invention, a sound insulation device for a vehicle is fitted to the sheet metal structure of the vehicle, and the sound insulation device includes: The outer structure forms a mounting groove with one end open; A partition structure is provided in the mounting groove and fixed to the bottom wall of the mounting groove, and the partition structure extends along the depth direction of the mounting groove. The sound insulation structure is filled in the mounting groove and covers the partition structure.

[0006] According to an embodiment of the present invention, a sound insulation device for a vehicle, by placing a partition structure in the mounting groove of the outer layer structure and fixing it to the bottom wall of the mounting groove, and extending the partition structure along the depth direction of the mounting groove, can block noise from moving along a direction perpendicular to the depth direction of the mounting groove, thereby preventing larger noise from spreading to smaller noise areas within the sound insulation device, avoiding sound leakage and other phenomena, and further improving the sound insulation effect of the sound insulation device.

[0007] According to some embodiments of the present invention, the partition structure divides the mounting groove into multiple sound insulation spaces, each sound insulation space extending along the depth direction of the mounting groove, and each sound insulation space is filled with a sound insulation structure.

[0008] According to some embodiments of the present invention, the bottom wall of the groove has multiple sub-bottom walls, and along the depth direction of the mounting groove, the multiple sub-bottom walls and multiple sound insulation spaces correspond one-to-one, and at least two sub-bottom walls have different thicknesses.

[0009] According to some embodiments of the present invention, the sidewall of the mounting groove has a first end facing away from the bottom wall of the groove, and along the depth direction of the mounting groove, the end of the partition structure facing away from the bottom wall of the groove is located on the side of the first end close to the bottom wall of the groove.

[0010] According to some embodiments of the present invention, along the depth direction of the mounting groove, the distance between the end of the partition structure away from the bottom wall of the groove and the first end is L, satisfying the relationship: 2.9mm≤L≤3.1mm.

[0011] In some embodiments of the present invention, the thickness of the partition structure is D1, which satisfies the relationship: 0.5mm≤D1≤1mm.

[0012] In some embodiments of the present invention, the thickness of the outer layer structure is D2, which satisfies the relationship: 1mm≤D2.

[0013] In some embodiments of the present invention, the outer layer structure and the partition structure are integrally formed.

[0014] According to some embodiments of the present invention, the end of the mounting groove sidewall facing away from the bottom wall of the groove is adapted to fit against a sheet metal structure.

[0015] The vehicle according to an embodiment of the present invention includes the sound insulation device for the vehicle described in the above embodiment.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a longitudinal sectional view of the sound insulation device according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of the sound insulation device according to an embodiment of the present invention.

[0018] Figure label: Sound insulation device 100; Outer structure 10; mounting groove 11; groove bottom wall 12; groove side wall 13; first end 14; Partition structure 20; Sound insulation space 21; Sound insulation structure 30; Sheet metal structure 200. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] The following is for reference. Figures 1-2 A sound insulation device 100 for a vehicle and a vehicle according to an embodiment of the present invention are described.

[0021] A sound insulation device 100 for a vehicle according to an embodiment of the present invention is fitted to the sheet metal structure 200 of the vehicle, and the sound insulation device 100 includes: The outer layer structure 10 forms a mounting groove 11 with one end open; The partition structure 20 is disposed in the mounting groove 11 and fixed to the bottom wall 12 of the mounting groove 11, and the partition structure 20 extends along the depth direction of the mounting groove 11. The sound insulation structure 30 is filled in the mounting groove 11 and covers the partition structure 20.

[0022] Among them, the sound insulation device 100 can be the front sound insulation pad of the vehicle. The sound insulation device 100 is attached to the sheet metal structure 200 of the vehicle to block noise from entering the cabin and improve the NVH performance of the vehicle.

[0023] The sound insulation device 100 includes an outer structure 10, which forms an installation groove 11 with one end open. The outer structure 10 can be constructed as a rubber structure, and the material of the rubber structure can be rubber, such as EPDM rubber, butyl rubber, etc. It can be reasonably selected and set according to the actual situation. The rubber structure can play the role of sound insulation and vibration reduction, especially the isolation effect of low frequency noise, which is conducive to reducing engine noise and road noise, and can also reduce the resonance of sheet metal structure 200.

[0024] The outer structure 10 forms an open mounting groove 11. The sound insulation structure 30 is filled in the mounting groove 11. The open end of the mounting groove 11 is attached to the sheet metal structure 200. The sound insulation structure 30 can be PUR foam. PUR foam can absorb noise. Through the combined use of the rubber structure and PUR foam, the rubber structure itself has high damping characteristics, which can convert the mechanical vibration energy caused by sound waves into heat energy and consume it, effectively suppressing structural vibration. The PUR foam forms a complex mesh structure. When sound waves enter the pores, they will cause friction between the air and the pore walls. Through viscous loss, the sound energy is converted into heat energy and consumed, playing a sound absorption role, thereby effectively improving the sound insulation effect of the sound insulation device 100.

[0025] The partition structure 20 and the outer layer structure 10 can be made of the same material. The partition structure 20 is located in the mounting groove 11 and fixed to the bottom wall 12 of the mounting groove 11. The partition structure 20 extends along the depth direction of the mounting groove 11 (the longitudinal direction of the sound insulation device 100), which can divide the space in the mounting groove 11 into different areas. The partition structure 20 can block noise from spreading along the direction perpendicular to the depth direction of the mounting groove 11 (the transverse direction of the sound insulation device 100), so as to prevent larger noise in the sound insulation device 100 from spreading to smaller noise areas, avoid sound leakage, and thus improve the sound insulation effect of the sound insulation device 100.

[0026] The sound insulation structure 30 covers the partition structure 20, specifically, Figure 1 and Figure 2 The gray material represents the sound insulation structure 30. The partition structure 20 is located in the mounting groove 11. The sound insulation structure 30 fills the mounting groove 11 and can cover the partition structure 20. The outer structure 10 can convert the mechanical vibration energy caused by sound waves into heat energy and consume it, effectively suppressing structural vibration. When sound waves enter the pores of the sound insulation structure 30, they will cause friction between the air and the pore wall. Through viscous loss, the sound energy is converted into heat energy and consumed, playing a sound absorption role. The partition structure 20 can block noise from moving along the direction perpendicular to the depth of the mounting groove 11, so as to prevent larger noise in the sound insulation device 100 from spreading to the smaller noise area and avoid sound leakage, thereby further improving the sound insulation effect of the sound insulation device 100.

[0027] It can be noted that the outer layer structure 10, the sound insulation structure 30, and the partition structure 20 can also be made of other materials that can meet the sound insulation requirements of the vehicle, and can be reasonably selected and set according to the vehicle's price positioning. As a specific embodiment of the present invention, the outer layer structure 10 and the partition structure 20 are both made of rubber, and the sound insulation structure 30 is made of PUR foam.

[0028] According to an embodiment of the present invention, the sound insulation device 100 for a vehicle, by providing a partition structure 20 in the mounting groove 11 of the outer layer structure 10 and fixing it to the bottom wall 12 of the mounting groove 11, and extending the partition structure 20 along the depth direction of the mounting groove 11, can block noise from moving along a direction perpendicular to the depth direction of the mounting groove 11, so as to prevent larger noise in the sound insulation device 100 from spreading to a smaller noise area, and avoid sound leakage and other phenomena, thereby further improving the sound insulation effect of the sound insulation device 100.

[0029] According to some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the partition structure 20 divides the mounting groove 11 into multiple sound insulation spaces 21, and the multiple sound insulation spaces 21 extend along the depth direction of the mounting groove 11. Each sound insulation space 21 is filled with a sound insulation structure 30.

[0030] The device includes multiple partition structures 20, which are distributed laterally along the mounting groove 11. These partition structures divide the mounting groove 11 into multiple sound-insulating spaces 21. Adjacent partition structures 20 are connected to each other, allowing the cross-sectional shape of the sound-insulating space 21 to be triangular, quadrilateral, pentagonal, hexagonal, etc., which can be reasonably selected and set according to actual conditions. All sound-insulating spaces 21 extend along the depth direction of the mounting groove 11. Each sound-insulating space 21 is filled with a sound-insulating structure 30. When sound waves enter the sound-insulating space 21 from the outer structure 10, the sound-insulating structure 30 converts sound energy into heat energy through viscous loss, thus absorbing sound. The partition structures 20 surrounding the sound-insulating space 21 can block noise from flowing along a direction perpendicular to the depth direction of the mounting groove 11, preventing noise from flowing between different sound-insulating spaces 21 within the sound insulation device 100. This prevents larger noise from spreading to smaller noise areas, avoiding sound leakage and further improving the sound insulation effect of the sound insulation device 100.

[0031] According to some embodiments of the present invention, such as Figure 1 As shown, the bottom wall 12 of the groove has multiple sub-bottom walls. Along the depth direction of the mounting groove 11, the multiple sub-bottom walls and multiple sound insulation spaces 21 correspond one-to-one, and at least two sub-bottom walls have different thicknesses.

[0032] The bottom wall 12 of the tank has multiple sub-bottom walls. In some embodiments of the present invention, the bottom wall 12 of the tank may have two, three, four or other numbers of sub-bottom walls. However, the present invention is not limited to this. The bottom wall 12 of the tank may also have other numbers of sub-bottom walls, as long as the bottom wall 12 of the tank has multiple sub-bottom walls.

[0033] Along the depth direction of the mounting groove 11, multiple sub-bottom walls and multiple sound insulation spaces 21 correspond one-to-one. At least two sub-bottom walls have different thicknesses. In some embodiments of the present invention, there may be two, three, four or more sub-bottom walls with different thicknesses. However, the present invention is not limited to this. There may also be other numbers of sub-bottom walls with different thicknesses, as long as at least two sub-bottom walls have different thicknesses.

[0034] Specifically, the thickness of the sub-base wall can be designed according to the noise level at different locations. Through simulation and other methods, the noise level of each soundproof space 21 is analyzed. The noise level of the area with the highest noise is set as m dB, and the thickness of the sub-base wall corresponding to the area with the highest noise is a mm. The noise level of the second highest noise area (usually around the area with the highest noise) is n dB, and the thickness of the sub-base wall corresponding to this area is b mm. To ensure the lightweight design concept of the soundproofing device 100 and to save costs, the thickness b of the sub-base wall corresponding to the second highest noise area should be less than the thickness a of the sub-base wall corresponding to the area with the highest noise. To avoid the "weakest link" effect in sound insulation, it is best to ensure that the noise radiated from the two areas is equal.

[0035] Based on acoustic principles, it can be deduced that doubling the thickness doubles the surface density. At the same time, according to the sound insulation quality law, doubling the surface density increases the sound insulation by approximately 20 log2 = 6 dB. Then, substituting m, n, and a into the formula 20 log(a / b) = mn, we can obtain the optimal thickness of b.

[0036] The noise levels in each area are compared and analyzed with those in the area with the highest noise level. The optimal thickness for each area is determined using the formula described above. The outer layer structure 10 and the partition structure 20 are then produced by CIM injection molding according to the designed thickness. The outer layer structure 10 is then placed in a foaming mold, and the sound insulation structure 30 is foamed in the sound insulation space 21 to form the sound insulation device 100 (rubber foam sound insulation pad). This method ensures the sound insulation effect of the sound insulation device 100 while saving materials and reducing its weight.

[0037] According to some embodiments of the present invention, such as Figure 1 As shown, the sidewall 13 of the mounting groove 11 has a first end 14 facing away from the bottom wall 12 of the groove. Along the depth direction of the mounting groove 11, the end of the partition structure 20 facing away from the bottom wall 12 of the groove is located on the side of the first end 14 close to the bottom wall 12 of the groove.

[0038] The mounting groove 11 has a first end 14 on its sidewall 13 facing away from the bottom wall 12. The first end 14 is attached to the sheet metal structure 200. Along the depth direction of the mounting groove 11, the end of the partition structure 20 facing away from the bottom wall 12 is located on the side of the first end 14 close to the bottom wall 12, so that the end of the partition structure 20 facing away from the bottom wall 12 is separated from the first end 14. This allows for flow between the ends of each sound insulation space 21 facing away from the bottom wall 12. When filling the sound insulation structure 30, it is not necessary to fill each sound insulation space 21 separately, and multiple PUR injection holes do not need to be designed. It is only necessary to fill the sound insulation structure 30 into one sound insulation space 21 to fill the entire mounting groove 11 with the sound insulation structure 30. This reduces the difficulty of the filling process and the mold cost of the sound insulation structure 30, thereby reducing the production cost of the sound insulation device 100 and helping to reduce the overall vehicle production cost.

[0039] According to some embodiments of the present invention, along the depth direction of the mounting groove 11, the distance between the end of the partition structure 20 away from the bottom wall 12 of the groove and the first end 14 is L, satisfying the relationship: 2.9mm≤L≤3.1mm.

[0040] Wherein, along the depth direction of the mounting groove 11, the distance L between the end of the partition structure 20 away from the bottom wall 12 of the groove and the first end 14 can be any value within 2.9mm-3.1mm. For example, L can be 2.9mm, 2.91mm, 3.0mm, 3.1mm, etc., but the present invention is not limited to this. L can also be other values ​​within 2.9mm-3.1mm, as long as L satisfies the relationship: 2.9mm≤L≤3.1mm.

[0041] As a specific embodiment of the present invention, L can be 3.0mm. This setting ensures that the sound insulation structure 30 can flow within the mounting groove 11 during filling, eliminating the need for separate filling into each sound insulation space 21. This reduces the difficulty of the filling process and the mold cost of the sound insulation structure 30, thereby reducing the production cost of the sound insulation device 100 and contributing to a reduction in the overall vehicle production cost. It also prevents the distance between the end of the partition structure 20 away from the bottom wall 12 of the groove and the first end 14 from being too large, which would reduce the noise blocking effect of the partition structure 20. This ensures that the partition structure 20 can effectively block noise from flowing along the direction perpendicular to the depth of the mounting groove 11, preventing noise from flowing between different sound insulation spaces 21 within the sound insulation device 100. This prevents larger noise from propagating to smaller noise areas, avoiding sound leakage and further improving the sound insulation effect of the sound insulation device 100.

[0042] According to some embodiments of the present invention, the thickness of the partition structure 20 is D1, which satisfies the relationship: 0.5mm≤D1≤1mm.

[0043] The thickness D1 of the partition structure 20 can be any value between 0.5mm and 1mm. For example, D1 can be 0.5mm, 0.6mm, 0.7mm, 1mm, etc. However, the present invention is not limited to this. D1 can also be other values ​​between 0.5mm and 1mm, as long as D1 meets the relationship: 0.5mm≤D1≤1mm.

[0044] 0.5mm-1mm is the thinnest thickness that can be achieved by the current rubber structure injection molding process. Since the partition structure 20 is inside the sound insulation device 100, it is not easily torn or damaged. Therefore, there is no need to set a large thickness. As long as the thickness of the partition structure 20 is sufficient to block the transmission of noise, it is fine. A smaller thickness of the partition structure 20 can reduce the weight of the sound insulation device 100, reduce the amount of material used, and thus reduce the production cost of the sound insulation device 100.

[0045] In some embodiments of the present invention, the thickness of the outer layer structure 10 is D2, satisfying the relationship: 1mm≤D2.

[0046] The thickness D2 of the outer layer structure 10 can be 1mm, 2mm, 3mm, etc., but the present invention is not limited to this. The thickness D2 of the outer layer structure 10 can also be greater than 1mm, as long as D2 satisfies the relationship: 1mm≤D2. Based on actual process limitations and other factors (such as easy tearing if too thin), the minimum thickness of the outer layer structure 10 is set to 1mm. All areas of the outer layer structure 10 with an optimal thickness lower than 1mm, as calculated above, are changed to 1mm. This ensures the reliability of the sound insulation device 100 and thus ensures its sound insulation effect.

[0047] According to some embodiments of the present invention, the outer layer structure 10 and the partition structure 20 can be integrally molded by CIM injection molding, which will not produce connection gaps, thereby improving the sound insulation effect of the sound insulation device 100. Furthermore, the integral molding has higher manufacturing precision, better structural strength, is not prone to deformation, and has strong stability, which is conducive to improving the reliability and sound insulation effect of the sound insulation device 100.

[0048] In some embodiments of the present invention, the end of the sidewall 13 of the mounting groove 11 facing away from the bottom wall 12 is adapted to fit against the sheet metal structure 200, which can reduce the resonance risk of the sheet metal structure 200, prevent sound leakage, and further improve the sound insulation effect of the sound insulation device 100. Furthermore, the sidewall 13 of the mounting groove 11 is edge-recessed (the edge of the mold cavity is made into a slope, step, or thin edge shape; during injection molding, the thickness naturally decreases as the material flows to the edge), making the edge of the sidewall 13 of the mounting groove 11 beveled, rounded, and thin, rather than a right-angled thick edge. This facilitates the assembly of the sound insulation device 100, prevents the sidewall 13 from warping, avoids the sound insulation device 100 from scratching hands, the sheet metal structure 200, and surrounding components, and also helps reduce the risk of sound leakage.

[0049] According to an embodiment of the present invention, a vehicle includes the sound insulation device 100 for a vehicle described above. By placing a partition structure 20 in the mounting groove 11 of the outer layer structure 10 and fixing it to the bottom wall 12 of the mounting groove 11, and extending the partition structure 20 along the depth direction of the mounting groove 11, noise is blocked from moving in a direction perpendicular to the depth direction of the mounting groove 11, so as to prevent larger noise in the sound insulation device 100 from spreading to smaller noise areas and to avoid sound leakage, thereby further improving the sound insulation effect of the sound insulation device 100.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A sound insulation device for a vehicle, the sound insulation device being fitted to the sheet metal structure of the vehicle, characterized in that, The sound insulation device includes: The outer structure forms a mounting groove with one end open; A partition structure is disposed within the mounting groove and fixed to the bottom wall of the mounting groove, and the partition structure extends along the depth direction of the mounting groove. A sound insulation structure is provided, which is filled within the mounting groove and covers the partition structure.

2. The sound insulation device for vehicles according to claim 1, characterized in that, The partition structure divides the mounting groove into multiple soundproof spaces, each of which extends along the depth direction of the mounting groove and is filled with the soundproof structure.

3. The sound insulation device for vehicles according to claim 2, characterized in that, The bottom wall of the groove has multiple sub-bottom walls. Along the depth direction of the mounting groove, the multiple sub-bottom walls and the multiple sound insulation spaces correspond one-to-one, and at least two of the sub-bottom walls have different thicknesses.

4. The sound insulation device for vehicles according to claim 2, characterized in that, The mounting groove has a first end facing away from the bottom wall of the groove. Along the depth direction of the mounting groove, the end of the partition structure facing away from the bottom wall of the groove is located on the side of the first end close to the bottom wall of the groove.

5. The sound insulation device for a vehicle according to claim 4, characterized in that, Along the depth direction of the mounting groove, the distance between the end of the partition structure away from the bottom wall of the groove and the first end is L, which satisfies the relationship: 2.9mm≤L≤3.1mm.

6. The sound insulation device for a vehicle according to claim 2, characterized in that, The thickness of the partition structure is D1, which satisfies the relationship: 0.5mm≤D1≤1mm.

7. The sound insulation device for a vehicle according to any one of claims 1-6, characterized in that, The thickness of the outer layer is D2, which satisfies the relationship: 1mm≤D2.

8. The sound insulation device for a vehicle according to any one of claims 1-6, characterized in that, The outer layer structure and the partition structure are integrally formed.

9. The sound insulation device for a vehicle according to any one of claims 1-6, characterized in that, The end of the mounting groove sidewall facing away from the bottom wall of the groove is adapted to fit against a sheet metal structure.

10. A vehicle, characterized in that, Includes the sound insulation device for a vehicle as described in any one of claims 1-9.

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