Sound insulation assembly for automobile, front enclosure for automobile and automobile

Abstract

The utility model discloses a sound insulation assembly for an automobile, a front enclosure for the automobile and the automobile, the sound insulation assembly comprises a first protective plate, a sound insulation base body and a second protective plate which are arranged in a stacked mode, and a plurality of first sound attenuation structures and a plurality of second sound attenuation structures are arranged in the sound insulation base body in an array mode. The first silencing structures and the second silencing structures are arranged in a staggered mode in the thickness direction of the sound insulation base body. The first silencing structure comprises a first through hole and a first sound-absorbing recess, the second silencing structure comprises a second through hole and a second sound-absorbing recess, the first through hole is communicated with the inner wall of the first protective plate and an inner cavity of the first sound-absorbing recess, and the second through hole is communicated with the inner wall of the second protective plate and an inner cavity of the second sound-absorbing recess; the first sound-absorbing recess and the second sound-absorbing recess which are communicated with each other achieve the purpose of noise reduction. According to the sound insulation assembly for the automobile, noise is consumed and weakened through the multiple first sound attenuation structures and the multiple second sound attenuation structures, and the noise reduction effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a sound insulation component for automobile and a front wall baffle for automobile, which can be applied to automobiles. Background Art

[0002] With the rapid development of the automobile market, passengers' requirements for riding comfort are constantly increasing, and the design demand for automobile sound insulation structures is also gradually increasing. The use of automobile sound insulation structures can effectively reduce noise and vibration in the car, giving passengers a quiet and comfortable riding experience. In addition, the government's restrictions on automobile noise pollution are becoming more and more stringent. Therefore, cars with sound insulation structures are becoming more and more popular among passengers and drivers.

[0003] In a car, sound insulation components are usually installed in car parts such as car door panel sound insulation, chassis sound insulation and car roof sound insulation. This sound insulation component includes a heavy layer material of a sound insulation pad, a sound absorbing material of the sound insulation pad and a metal sheet.

[0004] Take the car's front panel as an example. The car's front panel is one of the components of the car's structure. The car's front panel is located between the engine compartment and the car body. Its specific structure is a partition-like structure, which is connected to the car's floor and front pillars and installed under the front panel cover. Since the car's front panel is a partition structure that separates the car's engine compartment and the car body, in order to prevent the noise from the engine compartment from entering the car body and affecting the driver and passengers' riding experience, the front panel must have a good sound insulation effect.

[0005] In the prior art, the front enclosure of a car is often made of steel sheet metal and sound insulation pads. However, due to the heavy weight of the steel sheet metal itself, it is not conducive to energy conservation and emission reduction of the car. If other lighter materials are used for the front enclosure of the car, although the weight requirements are met, the sound insulation effect is poor, and the noise brings a bad riding experience to the driver and passengers.

[0006] For example, the patent document with publication number CN219312680U in the prior art discloses a shock-absorbing and sound-absorbing automobile front wall sound insulation pad, comprising a front wall sound insulation pad body, a rubber airbag is fixedly connected to the upper surface of the bottom end of the front wall sound insulation pad body, a sound-absorbing pad is connected to the upper surface of the rubber airbag, one end of the sound-absorbing pad is fixedly connected to the upper surface of the front wall sound insulation pad body, the other end of the sound-absorbing pad is fixedly connected to a rubber block, the outer wall of the rubber block is movably connected to the bottom end of the rubber airbag, a through hole is opened on the upper surface of the rubber airbag, and the hole wall of the through hole is fixedly connected to an air filling and discharging nozzle, and an auxiliary mechanism is fixedly connected to the upper surface of the rubber block. The sound-absorbing pad of the utility model increases the sound-absorbing ability of the automobile tires through the rubber airbag, reduces the interference of the front tire noise on the interior of the automobile, and effectively improves the sound-absorbing ability of the automobile front wall sound insulation pad, but the patent document does not disclose a solution for further improving the sound insulation effect by using multiple noise reduction methods.

[0007] Therefore, the prior art has the problem that the sound insulation effect of the automobile sound insulation component is poor. Utility Model Content

[0008] The utility model aims to solve the problem that the sound insulation effect of the automobile sound insulation component in the prior art is poor.

[0009] In order to solve the above problems, the embodiment of the utility model provides a sound insulation component for automobile, comprising a first guard plate, a sound insulation base, and a second guard plate which are stacked; wherein a plurality of first sound-absorbing structures and a plurality of second sound-absorbing structures arranged in an array are arranged in the sound insulation base; wherein, in a thickness direction cross section of the sound insulation base, the first sound-absorbing structure extends from the first guard plate to the inside of the sound insulation base, the second sound-absorbing structure extends from the second guard plate to the inside of the sound insulation base, and the first sound-absorbing structure and the second sound-absorbing structure are arranged alternately with each other in the thickness direction; wherein the first sound-absorbing structure comprises a first sound-absorbing recess and a first through hole located on the inner side of the periphery of the first sound-absorbing recess, and in a thickness direction cross section of the sound insulation base, the cross-sectional area of ​​the first sound-absorbing recess gradually increases from the first guard plate toward the inside of the sound insulation base, and the first through hole communicates the inner wall of the first guard plate with the inner cavity of the first sound-absorbing recess;

[0010] The second sound-absorbing structure includes a second sound-absorbing recess and a second through hole located on the inner side of the periphery of the second sound-absorbing recess, wherein, in the thickness direction cross-section of the sound-insulating base, the cross-sectional area of ​​the second sound-absorbing recess gradually increases from the second guard plate toward the inside of the sound-insulating base, and the second through hole connects the inner wall of the second guard plate and the inner cavity of the second sound-absorbing recess; and the peripheries of the first sound-absorbing recess and the second sound-absorbing recess adjacent to each other partially intersect and connect with each other.

[0011] By adopting the above technical solution, the automobile sound insulation component provided by the utility model is composed of a first guard plate, a sound insulation base and a second guard plate. A plurality of first sound-absorbing structures and a plurality of second sound-absorbing structures arranged in an array are arranged in the sound insulation base, so that the noise is absorbed and consumed multiple times by the plurality of first sound-absorbing structures and the plurality of second sound-absorbing structures, thereby fully reducing the noise. The first sound-absorbing structure extends from the first guard plate to the inside of the sound insulation base, and the second sound-absorbing structure extends from the second guard plate to the inside of the sound insulation base, that is, the first sound-absorbing structure and the second sound-absorbing structure are both arranged between the first guard plate and the second guard plate, and the first sound-absorbing structure and the second sound-absorbing structure are sandwiched between the first guard plate and the second guard plate, so that the structure is compact, the noise entering the guard plate is collected, and the appearance is neat and beautiful.

[0012] In addition, through the first sound-absorbing recess and the first through hole arranged on the inner side of the periphery of the first sound-absorbing recess, after the noise is consumed and weakened by the setting of the first through hole, the noise passes through the first sound-absorbing recess again to achieve secondary consumption of the noise, and finally achieves overall reduction or even elimination of the noise. The structure of the second sound-absorbing structure is similar to that of the first sound-absorbing structure, and can also play a role in reducing noise propagation. And because the peripheries of the first sound-absorbing recess and the second sound-absorbing recess partially intersect and communicate with each other, noise can be transmitted between the first sound-absorbing recess and the second sound-absorbing recess, so that the noise can be consumed again in the first sound-absorbing structure and the second sound-absorbing structure. Through the consumption and weakening of noise by the above-mentioned first sound-absorbing structure and the second sound-absorbing structure, the sound insulation effect is better.

[0013] Therefore, the automobile sound insulation component provided by the utility model has the advantage of good sound insulation effect by consuming and reducing noise.

[0014] According to the automobile sound insulation component provided by the embodiment of the utility model, when looking at the sound insulation base along the thickness direction, multiple first sound-absorbing structures are arranged in an array with equal spacing, wherein the first sound-absorbing recesses of the multiple first sound-absorbing structures have the same shape and the first through holes are also arranged at equal spacing; multiple second sound-absorbing structures are arranged in an array with equal spacing, wherein the second sound-absorbing recesses of the multiple second sound-absorbing structures have the same shape and the second through holes are also arranged at equal spacing; and the first through holes and the second through holes are staggered with each other.

[0015] By adopting the above technical solution, the first sound-absorbing structure and the second sound-absorbing structure are respectively extended toward the inside of the sound-insulating matrix to a distance of half the thickness of the sound-insulating matrix. Such uniform arrangement of the first sound-absorbing structure and the second sound-absorbing structure can improve the sound insulation effect and facilitate actual mass production. Multiple first sound-absorbing structures and multiple second sound-absorbing structures are arranged in an array with equal spacing, which is also convenient for mass production in the production process, and the array-like equal spacing arrangement is neat and beautiful. The first sound-absorbing recess and the second sound-absorbing recess are set to the same shape, which is not only convenient for mass production, but also the shape of the recess can better absorb noise; the first through hole and the second through hole are arranged at equal spacing, which is also convenient for mass production.

[0016] According to the automobile sound insulation component provided by the embodiment of the utility model, each first through hole is located on the inner side of the periphery where the first sound absorbing recess where the first through hole is located and an adjacent second sound absorbing recess intersects with each other, and is communicated with the inner cavity of an adjacent second sound absorbing recess; and each second through hole is located on the inner side of the periphery where the second sound absorbing recess where the second through hole is located and another adjacent first sound absorbing recess intersects with each other, and is communicated with the inner cavity of another adjacent first sound absorbing recess.

[0017] By adopting the above technical solution, the first through hole is arranged on the inner side of the periphery where the first sound-absorbing recess where the first through hole is located intersects with an adjacent second sound-absorbing recess. After the noise is consumed by the first through hole, it can enter the adjacent first sound-absorbing recess to realize secondary consumption of the noise, thereby improving the noise reduction effect. Similarly, the second through hole is arranged on the inner side of the periphery where the second sound-absorbing recess where the second through hole is located intersects with another adjacent first sound-absorbing recess. After the noise is consumed by the second through hole, it can enter the adjacent second sound-absorbing recess to be consumed again, thereby improving the noise reduction effect. The first through hole is connected to the inner cavity of an adjacent second sound-absorbing recess, and the second through hole is connected to the inner cavity of another adjacent first sound-absorbing recess, that is, after the noise in the first through hole or the second through hole is consumed, it can also be transmitted to the inner cavity of the adjacent second sound-absorbing recess or the inner cavity of the first sound-absorbing recess, respectively, thereby realizing the consumption of noise from another angle. The above multiple consumption of noise fully reduces the propagation of noise.

[0018] According to the automobile sound insulation component provided by the embodiment of the utility model, the sound insulation base includes a first sound insulation layer and a second sound insulation layer which are stacked and have equal thickness, the first sound insulation structure is formed on the first sound insulation layer, and the second sound insulation structure is formed on the second sound insulation layer.

[0019] With the above technical solution, the first sound insulation layer and the second sound insulation layer are stacked in the sound insulation matrix and have equal thickness, and there is no extra space between the first sound insulation layer and the second sound insulation layer, which effectively limits the noise inside the sound insulation matrix, and facilitates the first sound silencing structure and the second sound silencing structure to process the collected noise. The first sound insulation layer and the second sound insulation layer of equal thickness facilitate the user to select the sound insulation layer.

[0020] According to the automotive sound insulation component provided by the embodiment of the utility model, in the sound insulation matrix, the first through hole and the second through hole both extend in the thickness direction, and the diameters are both in the range of 0.8-1.2 mm, and the total area perforation rate of the first through hole and the second through hole in the sound insulation matrix is ​​less than 2% of the overall area of ​​the sound insulation matrix.

[0021] By adopting the above technical solution, the diameters of the first through hole and the second through hole are set within the range of 0.8-1.2 mm. The through holes in this range have the best noise consumption effect and can achieve the maximum noise reduction purpose; the total area perforation rate of the first through hole and the second through hole in the sound insulation matrix is ​​less than 2% of the overall area of ​​the sound insulation matrix, which is not only convenient for drilling, but also can achieve the best noise reduction effect.

[0022] According to the automobile sound insulation component provided by the embodiment of the utility model, the first sound absorbing recess and the second sound absorbing recess are both formed as acoustic black hole structures of the same size, wherein in the thickness direction cross section of the sound insulation substrate, the inner contour line of the first sound absorbing recess or the second sound absorbing recess conforms to the exponential function form h(x)=k*x m(m≥2), wherein x is a different point on the inner contour line of the first sound absorbing recess or the second sound absorbing recess, h(x) is the thickness value corresponding to point x, m is the thickness change order, and k is the change coefficient.

[0023] By adopting the above technical solution, the acoustic black hole structure has the function of absorbing noise waves. The first sound-absorbing recess and the second sound-absorbing recess are set to be acoustic black hole structures of the same size, which can absorb the noise passing through the first sound-absorbing recess and the second sound-absorbing recess, or deflect the noise near the first sound-absorbing recess and the second sound-absorbing recess, thereby absorbing the noise waves. The inner contour trajectory function form of the first sound-absorbing recess or the second sound-absorbing recess is h(x)=k*x m (m≥2), giving the first sound absorbing recess or the second sound absorbing recess a specific quantitative parameter for the structure, so that the designer can obtain the corresponding thickness value h(x) according to different points x on the inner contour line of the first sound absorbing recess or the second sound absorbing recess, which is convenient for design and production.

[0024] According to the automobile sound insulation component provided by the embodiment of the utility model, the first sound absorbing recess and the second sound absorbing recess are filled with a sound absorbing body at least in the middle part.

[0025] By adopting the above technical solution, a sound absorbing body is filled at least between the first sound absorbing recess and the second sound absorbing recess, and the sound absorbing body is used to further absorb noise, thereby improving the noise reduction effect.

[0026] According to the automobile sound insulation component provided by the embodiment of the utility model, the sound insulation matrix is ​​made of PET foam material, the first guard plate and the second guard plate are made of continuously woven glass fiber boards, and the sound absorber is made of melamine foam.

[0027] By adopting the above technical scheme, PET foam material is a lightweight material, which reduces the weight of the sound insulation matrix, realizes the lightweight of the sound insulation matrix, and then achieves the purpose of energy saving and emission reduction; compared with metal sheet materials, the continuous woven glass fiber board is not only lightweight, but also can be formed and combined with PET foam material; melamine foam is used as the material of the sound absorber, which has good sound absorption performance.

[0028] According to the embodiment of the utility model, the automobile front bumper provided by the utility model comprises any one of the above-mentioned automobile sound insulation components, wherein the automobile sound insulation component is coated on the outer side of the automobile front bumper sheet metal.

[0029] By adopting the above technical solution, the automobile sound insulation component is covered on the automobile front panel. The sound insulation component is part of the front panel and does not need to be provided with a separate sound insulation pad. The structure is simple and can fully isolate the propagation of noise between the inside and outside of the automobile front panel, and absorb noise from the outside to the maximum extent, thereby improving the sound insulation effect of the automobile front panel.

[0030] The automobile provided according to the embodiment of the utility model comprises a passenger compartment, an engine compartment and the above-mentioned front bumper for automobile, wherein the front bumper is arranged between the passenger compartment and the engine compartment.

[0031] By adopting the above technical solution, the sound insulation component is arranged on the front fender to reduce the noise from the engine compartment and ensure a quiet and comfortable riding environment in the passenger compartment.

[0032] The beneficial effects of the utility model are:

[0033] The utility model provides a car sound insulation component and a car, the car sound insulation component comprises a first guard plate, a sound insulation matrix, and a second guard plate which are stacked, wherein a plurality of first sound-absorbing structures and a plurality of second sound-absorbing structures in the sound insulation matrix have a consumption and reduction effect on sound, the first through hole included in the first sound-absorbing structure and the second through hole included in the second sound-absorbing structure have a preliminary consumption effect on noise, and the noise after consumption is consumed again through the first sound-absorbing recess and the second sound-absorbing recess, further reducing the noise; the first sound-absorbing recess of the first sound-absorbing structure and the second sound-absorbing recess of the second sound-absorbing structure are connected to each other at their peripheries, and the noise can continue to propagate to the second sound-absorbing structure through the above-mentioned connecting channel after being reduced by the first sound-absorbing structure for further noise reduction, and the noise after being reduced by the second sound-absorbing structure can also propagate to the first sound-absorbing structure for further noise reduction, so that the noise can be fully reduced. The consumption and reduction of noise by the above-mentioned sound insulation matrix improves the sound insulation effect of the car sound insulation component. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of a front wall sound insulation structure in the prior art;

[0035] Figure 2 A schematic diagram of the overall cross-sectional structure of a first guard plate, a sound insulation base and a second guard plate of a sound insulation assembly for an automobile provided in an embodiment of the utility model;

[0036] Figure 3 A schematic structural diagram of an acoustic black hole unit of a sound insulation assembly for an automobile provided by an embodiment of the utility model;

[0037] Figure 4 A schematic diagram of the acoustic black hole sound absorption principle provided by an embodiment of the utility model;

[0038] Figure 5 It is a schematic diagram of the structure of the front panel metal and the front sound insulation pad of the automobile.

[0039] Description of reference numerals:

[0040] 1. Sound insulation components;

[0041] 10. First guard plate;

[0042] 11. Inner wall of the first guard plate;

[0043] 20. Second guard plate;

[0044] 21. Inner wall of the second guard plate;

[0045] 30. Sound insulation matrix;

[0046] 31. The first sound-absorbing structure;

[0047] 310, first sound absorbing recess; 311, first through hole;

[0048] 32. The second sound-absorbing structure;

[0049] 320, second sound absorbing recess; 321, second through hole;

[0050] 33. The first sound insulation layer;

[0051] 34. Second sound insulation layer;

[0052] 35. Sound absorber;

[0053] 36. Car front wall guard;

[0054] 360. Automobile front panel metal;

[0055] 37. Passenger compartment;

[0056] 38. Engine compartment;

[0057] 39. Acoustic black hole structure;

[0058] 40. Front wall sound insulation pad;

[0059] 41. Heavy layer material of sound insulation pad;

[0060] 42. Sound-absorbing materials of sound insulation pads;

[0061] 43. Metal sheet;

[0062] F. Thickness direction of the sound insulation substrate. DETAILED DESCRIPTION

[0063] With the continuous development of automobiles and their supporting facilities, passengers in the passenger compartment of automobiles pay more and more attention to comfortable and quiet riding experience. The quietness of automobiles has gradually become an important indicator to measure performance. In this regard, all automobiles on the market will be treated with sound insulation, which can effectively reduce the noise inside the car, including the roar of the engine, the vibration of the car body, the friction of the wheels, etc. If these noises are too loud, it will seriously affect the comfort of the car and the normal driving of the driver and passengers. Through sound insulation treatment, a quiet interior space can be created to improve the comfort of the passengers.

[0064] In the existing technology, there are various means of automobile sound insulation treatment. The following are some of the main sound insulation treatment methods:

[0065] To deal with the roar of the engine, sound insulation materials are usually added to the engine. For example, high-grade sound-absorbing foam materials are installed under the hood, which can not only absorb a lot of noise, but also slow down the vibration of the engine compartment hood, thereby significantly reducing the engine noise.

[0066] As for the friction sound of the wheels, on the one hand, using tires with good quietness can reduce the noise generated by the friction between the tires and the road, thereby reducing the noise level inside the car. On the other hand, a sound insulation layer will be installed at the bottom plate of the car body.

[0067] In addition, the gaps in the interlayer of the car body can be soundproofed by adding sound insulation structural parts.

[0068] From the above, it can be seen that even though there are various means of automobile sound insulation treatment in the prior art, sound insulation structural parts are indispensable structures in various sound insulation treatment means.

[0069] In the prior art, the sound insulation structural parts are mainly sound insulation pads, see Figure 1 as well as Figure 5 The sound insulation pad 40 includes a heavy layer material 41 and a sound absorbing material 42. Such a sound insulation pad 40 is usually used in conjunction with a metal sheet 43. In order to improve the sound insulation effect, designers usually use multiple layers of heavy layer material 41 and sound absorbing material 42, or use heavy layer material 41 and sound absorbing material 42 with larger thickness. In this case, although the sound insulation effect is improved, the thickness and weight of the sound insulation pad 40 will be increased, thereby increasing the space occupied by the sound insulation pad 40 on the car and increasing the weight of the car.

[0070] Therefore, the sound insulation structural parts in the prior art have a poor sound insulation effect when the thickness and mass are small, that is, the lightweight demand of the sound insulation component and the good sound insulation effect cannot be taken into account at the same time.

[0071] In response to the above problems, the present application provides a sound insulation component for automobiles, which can be used in automobiles. This sound insulation component has a sound insulation matrix. By setting a plurality of first sound-absorbing structures and a plurality of second sound-absorbing structures in the sound insulation matrix, when the sound passes through the sound insulation matrix, the air vibration and the noise sound wave vibration in the plurality of first sound-absorbing structures and the plurality of second sound-absorbing structures offset each other and consume the sound, thereby achieving noise reduction. This sound insulation matrix can also improve the sound insulation effect without increasing the thickness of the sound insulation matrix. That is, in the case of small thickness and mass, it has the advantage of good sound insulation effect, and can simultaneously meet the lightweight requirements of the sound insulation component and good sound insulation effect.

[0072] It should be understood that the automobile sound insulation component provided in the embodiment of the present application can be applied to various sound insulation locations such as between the automobile passenger compartment and the engine compartment, the automobile floor, the rear surround, etc.

[0073] In order to more clearly understand the automobile sound insulation assembly provided by the present application, the structure of the sound insulation assembly is described in detail below with reference to the accompanying drawings.

[0074] See also Figure 2 The automobile sound insulation component 1 includes a first guard plate 10, a sound insulation base 30 and a second guard plate 20, wherein the sound insulation base 30 is composed of a first sound absorbing structure 31 and a second sound absorbing structure 32 arranged in an array. In this embodiment, the first sound absorbing structure 31 and the second sound absorbing structure 32 are arranged alternately in the thickness cross-sectional direction of the sound insulation base 30, and the first through hole 311 in the first sound absorbing structure 31 is connected to the first sound absorbing recess 310; the second through hole 321 in the second sound absorbing structure 32 is connected to the second sound absorbing recess 320. The first sound absorbing recess in the first sound absorbing structure 31 and the second sound absorbing recess in the second sound absorbing structure 32 are also arranged alternately, and the peripheral edges of the adjacent first sound absorbing recess 310 and the second sound absorbing recess 320 are interconnected, that is, the adjacent first sound absorbing structure 31 and the second sound absorbing structure 32 are also interconnected.

[0075] In the utility model, the automobile sound insulation component 1 realizes the consumption or reduction of noise through the sound insulation matrix 30, and the first sound-absorbing structure 31 and the second sound-absorbing structure 32 in the sound insulation matrix 30 play the main role in the noise reduction process. The first sound-absorbing structure 31 includes a first through hole 311 and a first sound-absorbing recess 310, wherein the first through hole 311 connects the first guard plate inner wall 11 and the first sound-absorbing recess 310. When the noise generated by the engine compartment 38 first passes through the first through hole 311, the noise wave will undergo diffraction, reflection and absorption. While the noise wave and the first through hole 311 are interacting with each other as described above, a sound pressure difference is formed inside and outside the first through hole 311, thereby generating the edge vibration of the first through hole 311, converting the sound wave energy into mechanical energy and consuming it, thereby realizing the preliminary noise reduction process; after the noise reduction process, the sound wave 310 is reduced to a certain extent. The sound waves after the noise are transmitted to the first sound absorbing recess 310 again, and the first sound absorbing recess 310 consumes the noise again; since the first sound absorbing recess 310 and the second sound absorbing recess 320 are interconnected in the embodiment, the noise consumed and weakened in the first sound-absorbing structure 31 can also be transmitted to the second sound-absorbing structure 32. The second through hole 321 of the second sound-absorbing structure 32 connects the inner wall 21 of the second guard plate 20 and the second sound-absorbing recess. When the thickness of the sound insulation component remains unchanged, the noise is continuously consumed and weakened, and the purpose of noise reduction is finally achieved.

[0076] The structure of the sound insulation base 30 will be explained in detail below.

[0077] The structure of the sound insulation base 30 is not limited, and can be a plate, a block, etc.

[0078] In one embodiment, the sound insulation base 30 is configured as a plate-like structure made of PET foam material.

[0079] In another embodiment, the sound insulation base 30 is a plate-like structure made of a porous sound-absorbing material, and a first protective plate 10 and a second protective plate 20 are stacked on both sides of the porous sound-absorbing material. The porous sound-absorbing material can consume and reduce noise to achieve the effect of sound insulation and noise reduction.

[0080] Based on the two implementations of the above-mentioned sound insulation substrate 30, please continue to refer to Figure 2 The sound insulation base 30 includes a first sound insulation layer 33 and a second sound insulation layer 34 which are stacked.

[0081] The structure and arrangement of the first sound insulation layer 33 and the second sound insulation layer 34 are not limited, and the two can be arranged as an integral structure or separately.

[0082] In one embodiment, the first sound insulation layer 33 and the second sound insulation layer 34 are separately stacked, and the thickness of the first sound insulation layer 33 and the second sound insulation layer 34 are equal. This design facilitates mold processing of the first sound insulation layer 33 and the second sound insulation layer 34, and realizes mass production. The first sound insulation layer 33 is stacked with a first guard plate 10 on one side away from the second sound insulation layer 34, and the second sound insulation layer 34 is stacked with a second guard plate 20 on one side away from the first sound insulation layer 33. The first guard plate 10 and the second guard plate 20 are stacked with the first sound insulation layer 33 and the second sound insulation layer 34 to form a sound insulation component 1.

[0083] In another embodiment, the first sound insulation layer 33 and the second sound insulation layer 34 are configured as an integrally formed structure. The integrally formed configuration enables the first sound insulation layer 33 and the second sound insulation layer 34 to be connected as a whole, which has a simple structure and is easy to produce and process. At the same time, the first sound insulation layer 33 and the second sound insulation layer 34 can still achieve the effect of sound insulation and noise reduction.

[0084] For further information, see Figure 2 When the sound insulation substrate 30 includes a first sound insulation layer 33 and a second sound insulation layer 34 stacked, a plurality of first sound absorbing structures 31 are arranged on the first sound insulation layer 33, and a plurality of second sound absorbing structures 32 are arranged on the second sound insulation layer 34. The plurality of first sound absorbing structures 31 include first through holes 311 and first sound absorbing recesses 310, wherein the first sound absorbing recesses 310 have the same shape and the first through holes 311 are arranged at equal intervals, and the plurality of second sound absorbing recesses 320 have the same shape and the second through holes 321 are arranged at equal intervals. The above arrangement is convenient for subsequent mass production.

[0085] Furthermore, the thickness dimensions of the first sound-absorbing structure 31 and the second sound-absorbing structure 32 along the thickness direction F of the sound-insulating substrate may be half each, or may be set to other equal parts.

[0086] In one embodiment, see Figure 2 The first sound-absorbing structure 31 and the second sound-absorbing structure 32 are both set to be half the thickness along the thickness direction F of the sound insulation substrate. The setting of half the thickness is regular and orderly. Sound waves propagate evenly and orderly in the first sound-absorbing structure 31 and the second sound-absorbing structure 32, which is convenient for monitoring and detecting noise.

[0087] In another embodiment, along the thickness direction F of the sound insulation substrate, the thickness dimensions of the first sound insulation structure 31 and the second sound insulation structure 32 may also be set to 1 / 3 and 2 / 3 of the thickness respectively; or the thickness dimensions of the first sound insulation structure 31 and the second sound insulation structure 32 may also be set to 1 / 4 and 3 / 4 of the thickness respectively. As long as the thickness dimensions of the first sound insulation structure 31 and the second sound insulation structure 32 along the thickness direction F of the sound insulation substrate meet the normal propagation of noise waves, and the thickness dimension rules are convenient for mass production, the present embodiment does not specifically limit the specific thickness dimensions.

[0088] Furthermore, the positions of the first through hole 311 and the second through hole 321 relative to the interior of the first sound absorbing recess 310 and the interior of the second sound absorbing recess 320 respectively may be located inside the first sound absorbing recess 310 or at the inner edge of the second sound absorbing recess 320, or may be located inside the first sound absorbing recess 310 or at the outer edge of the second sound absorbing recess 320.

[0089] In one embodiment, see Figure 2 The first through hole 311 and the second through hole 321 are staggered with each other. The first through hole 311 is located at the inner edge of the first sound absorbing recess 310, and the first through hole 311 is located at the intersection of the first sound absorbing recess 310 and the second sound absorbing recess 320. The first through hole 311 and the second sound absorbing recess 320 are interconnected. The interconnected arrangement allows noise to propagate between the first sound absorbing recess 310 and the second sound absorbing recess 320. The noise consumed and weakened by the first sound absorbing recess 310 can be propagated to the second sound absorbing recess 320 through the communicating hole to be consumed and weakened again. The noise consumed and weakened by the second sound absorbing recess 320 can also be propagated to the first sound absorbing recess 310 through the communicating hole to be consumed and weakened again, thereby achieving a sufficient noise reduction effect. It should be noted that the specific structures of the first sound absorbing recess 310 and the second sound absorbing recess 320 can be bowl-shaped, groove-shaped, etc., as long as they are convenient for absorbing noise, and this embodiment does not make any specific limitation on this.

[0090] In another embodiment, the first through hole 311 and the second through hole 321 are respectively arranged outside the edge of the first sound absorbing recess 310 and the second sound absorbing recess 320, but the first through hole 311 and the second through hole 321 are also connected to the first sound absorbing recess 310 and the second sound absorbing recess 320, respectively. At this time, the first through hole 311 and the second through hole 321 can be respectively arranged inside the second sound absorbing recess 320 and the first sound absorbing recess 310. It should be noted that, in another embodiment, the first through hole 311, the first sound absorbing recess 310 and the second sound absorbing recess 320 and the second through hole 321, the second sound absorbing recess 320 and the first sound absorbing recess 310 can be connected to each other as long as the normal propagation of sound waves is met, and they are interconnected and convenient for mass production. The specific position relationship is not specifically limited in this embodiment.

[0091] For further information, please see Figure 1 In order to ensure the initial noise reduction effect of the first through hole 311 and the second through hole 321, when the diameter size of the first through hole 311 and the second through hole 321 in this embodiment is set to 0.8mm-1.2mm, it can achieve the maximum consumption of sound waves, and when the perforation rate is less than 2%, it can also achieve the maximum sound wave consumption.

[0092] It should be noted that the diameter size of the first through hole 311 and the second through hole 321 in this embodiment can be set to 0.8 mm, 1.0 mm, or 1.2 mm, as long as the consumption of sound waves is satisfied and it is convenient for mass production. This embodiment does not make any specific limitation on this.

[0093] Specifically, the perforation ratio б of the total area S of the first through hole 311 and the second through hole 321 relative to the entire area So of the sound insulation base 30 is expressed as:

[0094] б=S / So*100%

[0095] Wherein, б is the perforation rate, S is the total area of ​​the first through hole 311 and the second through hole 321, and So is the overall area of ​​the sound insulation base 30;

[0096] For further information, see Figure 2 as well as Figure 3The first sound-absorbing recess 310 and the second sound-absorbing recess 320 are in the shape of an acoustic black hole structure 39. The acoustic black hole structure 39 can collect sound waves passing through it and also absorb sound waves near its structure. Specifically, when the bending wave propagates to the edge of the acoustic black hole structure 39, the accumulated phase will reach infinity. Theoretically, the bending wave will not be able to reach the edge of the structure, and all the wave energy can be concentrated at the tip of the structure. In this scheme, when the bending wave propagates into the acoustic black hole structure 39, the propagation speed of the wave whose initial propagation direction points to the center of the black hole gradually decreases, and the wave that deviates from the center of the black hole will deflect toward the center of the black hole, and finally the absorption and consumption of the wave is achieved.

[0097] See also Figures 2 to 4 Specifically, the inner contour line of the first sound absorbing recess 310 or the second sound absorbing recess 320 conforms to the exponential function:

[0098] h(x)=k*x m (m≥2)

[0099] Wherein x is any point on the inner contour line of the first sound absorbing recess 310 or the second sound absorbing recess 320 , h(x) is the thickness value corresponding to point x, m is the thickness variation order, and k is the variation coefficient.

[0100] Furthermore, the first sound absorbing recess 310 and the second sound absorbing recess 320 are filled with a sound absorbing body 35, and the sound absorbing body 35 is used to absorb the noise consumed and weakened by the first through hole 311 or the second through hole 321. It should be noted that the sound absorbing body 35 can be melamine foam, a porous sound absorbing body, a film sound absorbing body, etc. Taking the multi-hole sound absorbing body as an example, the multi-hole sound absorbing body is composed of many tiny holes and has a high multi-hole sound absorption performance. It is usually made of plastic, foam or fiber material. The specific material type of the sound absorbing body 35 can be any material as long as it meets the good sound absorption and lightweight effects, and this embodiment does not make any specific restrictions on this.

[0101] The material of the sound insulation base 30 is not limited, and can be made of PET foam material or porous material.

[0102] In one embodiment, the sound insulation matrix 30 is made of PET foam material.

[0103] It should be understood that PET foam material is Polyethylene terephthalatefa foam material, which is a lightweight material made of polyethylene terephthalate through a foaming process and has excellent chemical and physical properties.

[0104] In another embodiment, the sound insulation matrix 30 is made of a porous material, and the porous material can also achieve the effect of noise reduction and sound insulation by absorbing and consuming noise.

[0105] The structure and arrangement of the first guard plate 10 and the second guard plate 20 are explained in detail below.

[0106] The structure and arrangement of the first guard plate 10 and the second guard plate 20 are not limited.

[0107] In one embodiment, the first guard plate 10, the sound insulation matrix 30 and the second guard plate 20 are stacked, and the first guard plate 10 and the second guard plate 20 are set as a flat plate structure, which is made of a continuously woven fiberglass board, is light and low in cost. The design of the flat plate structure can fully fit the sound insulation matrix 30, thereby improving the sound insulation effect. The size and plane shape of the flat plate structure can be a quadrilateral, an ellipse, etc., as long as it satisfies the good stacking and fitting effect with the sound insulation matrix 30, and is neat and beautiful. The specific size and plane shape of the flat plate structure are not specifically limited in this embodiment.

[0108] The following takes the front fender 36 of an automobile as an example to further explain the sound insulation component of the present invention in detail.

[0109] See also Figure 2 and Figure 5 The utility model also provides a front panel for an automobile, and the front panel 36 of the automobile can be provided with the sound insulation component 1 of the above structure.

[0110] The sound insulation component 1 can be fixed to the front fender 36 of the automobile by means of a bayonet connection or adhesive bonding.

[0111] In one embodiment, the sound insulation component 1 is fixedly connected to the front fender 36 of the automobile by means of a bayonet socket connection.

[0112] In another embodiment, the sound insulation component 1 is tightly fitted to the front fender 36 of the automobile by gluing.

[0113] It should be understood that the automobile sound insulation component provided by the present invention is not limited to being used in the front panel 36 of the automobile, but can also be used in various sound insulation structures such as the floor and rear panel of the automobile.

[0114] In one embodiment, see Figure 1 The automobile sound insulation component provided by the utility model is applied to the sheet metal outer side of the automobile front wall guard 36 .

[0115] Furthermore, the utility model also provides a car, in which a front fender 36 is arranged between a passenger compartment 37 and an engine compartment 38 of the car, so as to block noise from the engine and provide passengers in the passenger compartment 37 with a quiet and comfortable riding experience.

[0116] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A sound insulation component for an automobile, characterized in that: It comprises a first protective plate, a sound insulation matrix and a second protective plate which are stacked; wherein, A plurality of first sound-absorbing structures and a plurality of second sound-absorbing structures arranged in an array are provided in the sound-insulating matrix; wherein, in a thickness-direction cross section of the sound-insulating matrix, the first sound-absorbing structure extends from the first guard plate to the inside of the sound-insulating matrix, the second sound-absorbing structure extends from the second guard plate to the inside of the sound-insulating matrix, and the first sound-absorbing structure and the second sound-absorbing structure are arranged alternately with each other in the thickness direction of the sound-insulating matrix; wherein The first sound-absorbing structure comprises a first sound-absorbing recess and a first through hole located inside the periphery of the first sound-absorbing recess, wherein in a thickness-direction cross section of the sound-insulating base, a cross-sectional area of ​​the first sound-absorbing recess gradually increases from the first guard plate toward the inside of the sound-insulating base, and the first through hole communicates with an inner wall of the first guard plate and an inner cavity of the first sound-absorbing recess; The second sound-absorbing structure comprises a second sound-absorbing recess and a second through hole located on the inner side of the periphery of the second sound-absorbing recess, wherein, in the thickness direction cross section of the sound-insulating base, the cross-sectional area of ​​the second sound-absorbing recess gradually increases from the second guard plate toward the inside of the sound-insulating base, and the second through hole communicates with the inner wall of the second guard plate and the inner cavity of the second sound-absorbing recess; and The peripheries of the first sound absorbing recess and the second sound absorbing recess adjacent to each other partially intersect and communicate with each other.

2. The automobile sound insulation assembly according to claim 1, characterized in that: When looking at the sound insulation matrix along the thickness direction of the sound insulation matrix, the multiple first sound insulation structures are arranged in an array with equal spacing, wherein the first sound absorbing recesses of the multiple first sound insulation structures have the same shape and the first through holes are also arranged with equal spacing; the multiple second sound insulation structures are arranged in an array with equal spacing, wherein the second sound absorbing recesses of the multiple second sound insulation structures have the same shape and the second through holes are also arranged with equal spacing; and the first through holes and the second through holes are staggered with each other.

3. The automobile sound insulation component according to claim 2, characterized in that: in Each of the first through holes is located inside the periphery where the first sound absorbing recess where the first through hole is located intersects with an adjacent second sound absorbing recess, and is communicated with an inner cavity of an adjacent second sound absorbing recess; and Each of the second through holes is located at the inner side of the periphery where the second sound absorbing recess where the second through hole is located intersects with another adjacent first sound absorbing recess, and is communicated with the inner cavity of another adjacent first sound absorbing recess.

4. The automobile sound insulation component according to claim 3, characterized in that: The sound insulation substrate comprises a first sound insulation layer and a second sound insulation layer which are stacked and have equal thickness; the first sound insulation structure is formed on the first sound insulation layer; and the second sound insulation structure is formed on the second sound insulation layer.

5. The automobile sound insulation component according to any one of claims 1 to 4, characterized in that: in In the sound insulation matrix, the first through hole and the second through hole both extend along the thickness direction of the sound insulation matrix, and their diameters are both within the range of 0.8-1.2 mm, and the total area perforation rate of the first through hole and the second through hole in the sound insulation matrix is ​​less than 2% of the overall area of ​​the sound insulation matrix.

6. The automobile sound insulation component according to any one of claims 1 to 4, characterized in that: in The first sound absorbing recess and the second sound absorbing recess are both formed into acoustic black hole structures of the same size, wherein in the thickness direction cross section of the sound insulation matrix, the inner contour line of the first sound absorbing recess or the second sound absorbing recess conforms to the exponential function form h(x)=k*x m (m≥2), wherein x is a different point on the inner contour line of the first sound absorbing recess or the second sound absorbing recess, h(x) is the thickness value corresponding to point x, m is the thickness variation order, and k is the variation coefficient.

7. The automobile sound insulation component according to any one of claims 1 to 4, characterized in that: in At least the middle portions of the first sound absorbing recess and the second sound absorbing recess are filled with a sound absorber.

8. The automobile sound insulation component according to claim 7, characterized in that: The sound insulation matrix is ​​made of PET foam material, the first guard plate and the second guard plate are made of continuously woven glass fiber boards, and the sound absorber is made of melamine foam.

9. A front wall guard for an automobile, characterized in that: The front fender for automobile comprises the automobile sound insulation assembly according to any one of claims 1 to 8; wherein The automobile sound insulation component is coated on the outer side of the front panel metal of the automobile.

10. A car, comprising a passenger compartment and an engine compartment, characterized in that: Also includes the front wall guard for an automobile as claimed in claim 9; wherein, The automobile front fence is arranged between the passenger compartment and the engine compartment.

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