CN220220623U - Automobile front wall sound absorption pad - Google Patents
Automobile front wall sound absorption pad Download PDFInfo
- Publication number
- CN220220623U CN220220623U CN202320622212.8U CN202320622212U CN220220623U CN 220220623 U CN220220623 U CN 220220623U CN 202320622212 U CN202320622212 U CN 202320622212U CN 220220623 U CN220220623 U CN 220220623U
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- Prior art keywords
- sound absorbing
- sound
- front wall
- noise
- pipe
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- 238000010521 absorption reaction Methods 0.000 title abstract description 15
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 229920000742 Cotton Polymers 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 15
- 238000009413 insulation Methods 0.000 description 7
- 230000008030 elimination Effects 0.000 description 5
- 238000003379 elimination reaction Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000741 silica gel Substances 0.000 description 4
- 229910002027 silica gel Inorganic materials 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model discloses an automobile front wall sound absorption pad, and belongs to the field of automobile noise reduction pads. The technical scheme includes that the automobile front wall sound absorbing pad comprises a front wall plate and sound absorbing components mounted on the front wall plate, wherein a plurality of sound absorbing holes are formed in the side face, close to a noise source, of the sound absorbing components, and 1/4 wave tubes are uniformly distributed in each sound absorbing hole; according to the utility model, the noise generated in the running process of the engine can be absorbed through the arrangement of the sound absorbing assembly, the noise in the automobile cab is reduced, the driving experience of a driver is increased, the noise absorbing effect of the sound absorbing assembly can be increased through the arrangement of the sound absorbing pore canal, the noise emitted by the engine can be eliminated through the arrangement of the 1/4 wave tube, and the noise absorbing effect of the sound absorbing assembly is further increased.
Description
Technical Field
The utility model belongs to the technical field of automobile silencing pads, and particularly relates to an automobile front wall sound absorbing pad.
Background
The front wall sound absorbing pad of the automobile body is a part arranged on the front wall metal plate of the automobile body, and is used for absorbing the transmission sound of an engine, and the transmission sound of the engine of the automobile is directly influenced by the design of the front wall sound absorbing pad, so that the comfort of passengers is influenced.
In the prior art, the utility model patent with the application number of CN201921609560.1 discloses a sound and heat insulation pad for the front wall of an automobile engine compartment, which comprises a heat insulation layer, a sound insulation layer and a protective surface layer which are sequentially connected; the heat insulation layer comprises a first silica gel layer and a second silica gel layer, a plurality of honeycomb holes are formed in the first silica gel layer and the second silica gel layer, and the two layers of honeycomb holes are connected in a staggered manner so as to form partial conduction; the sound insulation layer comprises a sound absorption cotton layer, and the thickness of the sound absorption cotton layer is larger than that of the heat insulation layer; the protective surface layer comprises a plastic film layer.
The mode that this application eliminated engine noise is single, hardly carries out the targeted absorption to certain noise frequency, and engine noise frequency distribution is extensive, and the noise of different frequencies appears in different engines, therefore, the dash board sound absorbing structure of traditional form is not applicable to the absorption of different engine noise yet.
Disclosure of Invention
The present utility model provides a solution to at least one of the above technical problems.
The technical scheme adopted by the utility model is as follows:
a sound pad is inhaled to enclose before car, including preceding bounding wall and install on preceding bounding wall inhale the sound subassembly, inhale and have offered a plurality of sound pore that inhale on the side that inhale the sound subassembly and be close to the noise source, every inhale the sound pore in equipartition and be equipped with 1/4 wave length pipe.
Preferably, the 1/4 wavelength tube comprises a main tube, at least one end of the main tube is open, the open end of the main tube faces the noise source, the side wall of the main tube is provided with an auxiliary tube with one end open and one end closed, and the open end of the auxiliary tube is connected into the inner cavity of the main tube.
Preferably, the secondary pipe diameter is smaller than the primary pipe diameter.
Preferably, the secondary pipe is located at an end of the primary pipe close to the noise source.
Preferably, the sound absorbing duct is arranged transversely and longitudinally along the sound absorbing assembly.
Preferably, the sound absorbing assembly is more densely packed in the region closer to the noise source.
Preferably, the sound absorbing duct length is longer nearer to the noise source.
Preferably, the 1/4 wavelength tube is formed of a metal structure or a plastic structure.
Preferably, the 1/4 wave tube is detachably connected with the sound absorbing duct.
Preferably, the material of the sound absorbing assembly is sound absorbing cotton, and the sound absorbing assembly comprises at least one layer of sound absorbing cotton.
By adopting the technical scheme, the utility model has the following beneficial effects:
1. according to the utility model, the noise generated in the running process of the engine can be absorbed through the arrangement of the sound absorbing assembly, the noise in the automobile cab is reduced, the driving experience of a driver is increased, the noise absorbing effect of the sound absorbing assembly can be increased through the arrangement of the sound absorbing pore canal, the noise emitted by the engine can be eliminated through the arrangement of the 1/4 wave tube, and the noise absorbing effect of the sound absorbing assembly is further increased.
In addition, inhale the material of sound subassembly and inhale the sound cotton for inhaling the sound subassembly and inhale the sound cotton including at least one deck sound, inhale the sound cotton and both can play the effect of noise absorption, can play the effect of buffering protection again, can also play thermal-insulated effect of heat preservation simultaneously, the heat of isolated engine gets into in the driver's cabin.
2. As a preferred embodiment of the utility model, noise generated by the operation of the engine enters the main pipe through the opening end of the main pipe, part of sound waves entering the main pipe are absorbed by the pipe wall and the sound absorbing component of the main pipe, the sound waves entering the main pipe enter the auxiliary pipe at the same time, and the sound waves entering the auxiliary pipe are reflected by the closed end of the auxiliary pipe back into the main pipe to be opposite to the sound waves in the main pipe in phase, so that the cancellation of the sound waves with the same frequency is realized, and the noise is further reduced.
3. As a preferred implementation mode of the utility model, the diameter of the main pipe is larger than that of the auxiliary pipe, so that noise of a low-frequency part can be conveniently counteracted, main pipes and auxiliary pipes with different diameters can be designed according to noise frequency characteristics of different engines, so that the noise elimination frequency is matched with the corresponding noise frequency of the engines, and further the 1/4 wave length pipe can effectively treat the noise of the engines, thereby achieving the best sound absorption and elimination effect and improving the user experience.
4. As a preferred embodiment of the utility model, the 1/4 wave tube is formed by a metal structure or a plastic structure, so that the structural strength of the wave tube can be increased, the service life of the wave tube can be prolonged, the 1/4 wave tube is detachably connected with the sound-absorbing duct, the 1/4 wave tube can be conveniently taken out of the sound-absorbing duct, dust in the tube can be cleaned, and the damaged 1/4 wave tube can be replaced.
5. As a preferred embodiment of the utility model, the sound absorbing pore canal is arranged transversely and longitudinally along the sound absorbing assembly, the contact surface of sound waves and the sound absorbing assembly can be increased by the arrangement mode, the noise absorbing effect of the sound absorbing assembly is improved, the sound absorbing pore canal is arranged more densely in the area, which is closer to the noise source, of the sound absorbing assembly, and the length of the sound absorbing pore canal, which is closer to the noise source, is longer, so that the sound absorbing assembly can absorb noise more pertinently, and the noise absorbing efficiency and the absorption efficiency of the engine can be further improved.
Drawings
FIG. 1 is a schematic diagram of a specific embodiment of the present utility model;
fig. 2 is a schematic structural view of a sound absorbing assembly according to an embodiment of the present utility model;
FIG. 3 is a second schematic view of a sound absorbing assembly according to an embodiment of the present utility model;
FIG. 4 is a schematic view of the structure of a 1/4 wavelength tube according to an embodiment of the present utility model.
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model.
In the drawings:
1. a dash panel; 2. a sound absorbing assembly; 3. a sound absorbing duct; 301. a main pipe; 302. and a secondary pipe.
Detailed Description
In order to more clearly illustrate the general inventive concept, a detailed description is given below by way of example with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.
In addition, in the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, the descriptions of the terms "implementation," "embodiment," "one embodiment," "example," or "particular example" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1 to 4, a sound absorbing pad for a front wall of an automobile comprises a front wall plate 1 and a sound absorbing assembly 2 arranged on the front wall plate 1, wherein a plurality of sound absorbing holes 3 are formed in the side surface, close to a noise source, of the sound absorbing assembly 2, and 1/4 wave tubes are uniformly distributed in each sound absorbing hole 3; the automobile front coaming 1 is the automobile engine cabin in one side of inhaling the sound subassembly 2 dorsad, and the noise that the engine operation in-process produced is inhaled through inhaling the sound subassembly 2, can reduce the noise in the automobile cab, increases driver's driving experience, inhales the noise absorbing effect that sound subassembly 2 can be increased in the setting of sound duct 3, can eliminate the noise that the engine sent through the setting of 1/4 wave length pipe, further increase the absorbing effect who inhales the noise of sound subassembly 2.
Referring to fig. 1 to 3, as a preferred embodiment of the sound absorbing assembly 2, the sound absorbing assembly 2 is made of sound absorbing cotton, the sound absorbing assembly 2 includes at least one layer of sound absorbing cotton, the sound absorbing cotton can not only absorb noise, but also play a role in buffering protection, and meanwhile, can play a role in heat preservation and heat insulation, and isolate heat of an engine from entering a cab.
Referring to fig. 4, as a preferred embodiment of the 1/4 wavelength tube, the 1/4 wavelength tube includes a main tube 301, the main tube 301 has at least one opening, the opening end of the main tube 301 faces the noise source, the side wall of the main tube 301 is provided with an auxiliary tube 302 with one opening end and one closing end, the opening end of the auxiliary tube 302 is connected to the inner cavity of the main tube 301, the noise generated by the engine running enters the main tube 301 through the opening end of the main tube 301, part of the sound wave entering the main tube 301 is absorbed by the tube wall of the main tube 301 and the sound absorbing assembly 2, the sound wave entering the main tube 301 enters the auxiliary tube 302 at the same time, and the sound wave entering the auxiliary tube 302 is reflected by the closing end of the auxiliary tube 302 back into the main tube 301 to be opposite to the sound wave phase of the main tube 301, thereby realizing cancellation of the sound wave with the same frequency, and further reducing the noise, which needs to be explained as: the length of the tube cavity of the auxiliary tube 302 should be 1/4 of the acoustic wave wavelength corresponding to the resonance frequency, and the calculation formula of the natural frequency of the resonator is as follows:
where c is the acoustic velocity in units of: m/s; l is the length of the wavelength tube, unit: m.
As a preferred example of the above embodiment, the diameter of the secondary pipe 302 is smaller than that of the primary pipe 301, so that the sound wave reflected from the secondary pipe 302 into the primary pipe 301 can be expanded to a certain extent, and from the design point of view, the diameter of the primary pipe 301 is larger than that of the secondary pipe 302, so that noise in a low-frequency part can be conveniently counteracted, and the primary pipe 301 and the secondary pipe 302 with different diameters can be designed according to the noise frequency characteristics of different engines, so that the noise elimination frequency is matched with the corresponding noise frequency of the engines, and further, the noise of the engines can be effectively processed by the 1/4 wave length pipe, and the best sound absorption and noise elimination effects can be achieved. For example, in the production process of an automobile, after the model of the engine is determined, the noise frequency generated during the running of the engine can be detected through the sound frequency detection device, the corresponding 1/4 wave tube is designed according to the noise frequency of the engine, the 1/4 wave tube is installed in the sound absorption duct 3, and in the running process of the engine, the specific 1/4 wave tube can obtain the best sound absorption and noise elimination effect, so that the automobile experience of a user is improved.
When 1/4 wavelength pipe design production, accessory pipe 302 sets up in the one end that is close to the noise source of main pipe 301, can further increase the cancellation effect of noise, and 1/4 wavelength pipe is formed by metal construction or plastic structure, can increase its structural strength, increases life, and 1/4 wavelength pipe is connected with inhaling sound duct 3 can dismantle, is convenient for take out 1/4 wavelength pipe from inhaling sound duct 3, clears up the dust in the pipe, changes the 1/4 wavelength pipe that damages.
Referring to fig. 1 to 3 as a preferred embodiment of the sound-absorbing duct 3, the sound-absorbing duct 3 is arranged transversely and longitudinally along the sound-absorbing assembly 2, by this arrangement, the contact surface between sound waves and the sound-absorbing assembly 2 can be increased, the effect of the sound-absorbing assembly 2 on absorbing noise is increased, the sound-absorbing duct 3 is arranged more densely in the area of the sound-absorbing assembly 2 closer to the noise source, and the length of the sound-absorbing duct 3 is longer in the area closer to the noise source, so that the sound-absorbing assembly 2 absorbs noise more specifically, and the absorption efficiency and absorption efficiency of engine noise can be further increased.
The utility model can be realized by adopting or referring to the prior art at the places which are not described in the utility model.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.
The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are to be included in the scope of the claims of the present utility model.
Claims (9)
1. The utility model provides a enclose before car and inhale sound pad, includes the dash board and installs on the dash board inhale the sound subassembly, its characterized in that inhale and offer a plurality of sound pore channels of inhaling on the side that the sound subassembly is close to the noise source, every inhale the sound in the pore channel equipartition and be equipped with 1/4 wave length pipe, 1/4 wave length pipe is including being responsible for, be responsible for at least one end opening, the open end of being responsible for is towards the noise source, be responsible for the lateral wall and be equipped with one end opening one end confined accessory pipe, the open end termination of accessory pipe is the main pipe inner chamber.
2. The automotive front wall sound absorbing mat of claim 1, wherein the secondary pipe diameter is smaller than the primary pipe diameter.
3. The automotive front wall sound absorbing pad of claim 2, wherein the secondary pipe is located at an end of the primary pipe adjacent to the noise source.
4. The automotive front wall sound absorbing pad of claim 1, wherein the sound absorbing duct is arranged in a transverse direction and a longitudinal direction of the sound absorbing assembly.
5. The automotive front wall sound absorbing pad of claim 4, wherein the sound absorbing assembly is more densely packed in the area closer to the noise source.
6. The automotive front wall sound absorbing pad of claim 5 wherein said sound absorbing duct length is longer nearer to the source of noise.
7. The front wall sound absorbing pad of an automobile according to any one of claims 1 to 4, wherein the 1/4 wave tube is formed of a metal structure or a plastic structure.
8. The front wall sound absorbing pad of an automobile according to any one of claims 1 to 4, wherein the 1/4 wave tube is detachably connected to the sound absorbing duct.
9. The automotive front wall sound absorbing pad of claim 1, wherein the sound absorbing member is made of sound absorbing cotton, and the sound absorbing member comprises at least one layer of sound absorbing cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320622212.8U CN220220623U (en) | 2023-03-23 | 2023-03-23 | Automobile front wall sound absorption pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320622212.8U CN220220623U (en) | 2023-03-23 | 2023-03-23 | Automobile front wall sound absorption pad |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220220623U true CN220220623U (en) | 2023-12-22 |
Family
ID=89195028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320622212.8U Active CN220220623U (en) | 2023-03-23 | 2023-03-23 | Automobile front wall sound absorption pad |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220220623U (en) |
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2023
- 2023-03-23 CN CN202320622212.8U patent/CN220220623U/en active Active
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