CN213619631U - Enclose before car lightweight and give sound insulation and fill up and car - Google Patents
Enclose before car lightweight and give sound insulation and fill up and car Download PDFInfo
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- CN213619631U CN213619631U CN202022422990.1U CN202022422990U CN213619631U CN 213619631 U CN213619631 U CN 213619631U CN 202022422990 U CN202022422990 U CN 202022422990U CN 213619631 U CN213619631 U CN 213619631U
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Abstract
The utility model discloses embodiment provides a enclose before car lightweight and give sound insulation and fill up and car relates to and encloses before the car and give sound insulation and fill up technical field. Enclose before car lightweight and give sound insulation and fill up, include: the sound insulation layer comprises a first sound absorption layer, a sound insulation layer and a second sound absorption layer which are arranged in a stacked mode; the sound insulation layer is arranged between the first sound absorption layer and the second sound absorption layer; a plurality of sound insulation elements are embedded in the second sound absorption layer, and the sound insulation elements are hollow structural members. The utility model discloses an it establishes hollow structure's syllable-dividing component to inlay in the sound layer is inhaled to the second to can reduce the weight that encloses the pad that gives sound insulation before the car when can enclose the sound insulation performance that gives sound insulation and fill up before effectual improvement car, and then be favorable to alleviateing electric automobile's battery continuation of the journey burden.
Description
Technical Field
The utility model relates to a enclose before the car and give sound insulation and fill up technical field, specifically relate to a enclose before car lightweight and give sound insulation and fill up and car.
Background
At present, an electric vehicle gradually becomes a tool for people to go out, and is limited by a battery technology, the endurance mileage of the electric vehicle is also greatly limited, generally within 300-.
Automotive dash acoustic insulator mats are typically installed between the engine compartment and the passenger compartment to insulate the powertrain from the transmission of air borne noise to the passenger compartment. The conventional automobile front wall sound insulation pad is generally in a structure of soft felt, membrane, hard felt, soft felt, hard felt and single-layer felt, and the single-layer felt has poor sound insulation performance; the soft felt + membrane + hard felt, and the soft felt + hard felt have VOC and odor pollution and poor anti-mould performance, and the structure of the soft felt + membrane + hard felt leads to relatively heavy weight if better sound insulation performance is achieved, thereby increasing the battery endurance load of the electric automobile.
SUMMERY OF THE UTILITY MODEL
The utility model provides an embodiment's purpose provides a enclose before car lightweight and give sound insulation and fill up and car, thereby solved the structure of enclosing before the current car and will make it reach the problem that better sound insulation performance often weight is heavier increased electric automobile's battery continuation of the journey burden.
In order to achieve the above object, the first aspect of the present invention provides a car lightweight front wall sound insulation pad, including:
the sound insulation layer comprises a first sound absorption layer, a sound insulation layer and a second sound absorption layer which are arranged in a stacked mode;
the sound insulation layer is arranged between the first sound absorption layer and the second sound absorption layer; the second sound-absorbing layer is internally embedded with a plurality of sound-insulating elements which are hollow structural members.
The sound insulation layer is made of polypropylene.
Optionally, the first sound absorbing layer is made of sound absorbing cotton, and the second sound absorbing layer is made of polyurethane.
Optionally, the sound-absorbing cotton is double-component sound-absorbing cotton or film-coated sound-absorbing cotton.
Optionally, the sound insulation layer is made of polypropylene.
Optionally, a plurality of sound insulation elements are embedded in the second sound absorption layer, and the sound insulation elements are hollow structural members.
Optionally, the sound insulating element is a spherical structural member.
Optionally, the material of the sound insulation element is silicon dioxide.
Optionally, through holes are configured in the second sound-absorbing layer.
Optionally, a protrusion is disposed on the sound insulation layer, a recess is disposed on the first sound absorption layer, and the recess is engaged with the protrusion.
Optionally, the protruding portion is disposed in an S shape, and the protruding portion is matched with the recessed portion.
In a second aspect of the present invention, there is provided an automobile, including the automobile lightweight front wall sound insulation pad.
The utility model discloses above-mentioned technical scheme is through inhaling the sound layer in the second and inlaying the syllable-dividing component of establishing hollow structure to can reduce the weight that encloses the sound insulation pad before the car when enclosing the sound insulation performance that gives sound insulation and fill up before effectual improvement car, and then be favorable to alleviateing electric automobile's battery continuation of the journey burden.
Other features and advantages of embodiments of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention, but do not constitute a limitation of the embodiments of the invention. In the drawings:
fig. 1 is a cross-sectional view of a lightweight front wall sound insulation pad of an automobile according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of the distribution of the sound-damping elements provided by the preferred embodiment of the present invention;
FIG. 3 is a comparison of sound insulation provided by a preferred embodiment of the present invention;
fig. 4 is a graph comparing sound absorption performance provided by the preferred embodiment of the present invention.
Description of the reference numerals
100-first sound absorbing layer, 200-sound insulating layer, 300-second sound absorbing layer, 310-sound insulating element.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
As shown in fig. 1, the utility model discloses an aspect provides a before car lightweight encloses sound insulation pad, includes:
a first sound absorbing layer 100, a sound insulating layer 200, and a second sound absorbing layer 300, which are stacked; the soundproof layer 200 is disposed between the first sound-absorbing layer 100 and the second sound-absorbing layer 300; a plurality of sound insulating members 310 are embedded in the second sound absorbing layer 300, and the sound insulating members 310 are hollow structural members.
Thus, in the present embodiment, the sound insulation element 310 having a hollow structure is embedded in the second sound absorption layer 300, so that the weight of the front wall sound insulation pad of the automobile can be reduced while the sound insulation performance of the front wall sound insulation pad of the automobile is effectively improved, and the battery life of the electric automobile can be favorably reduced.
Specifically, the first sound absorbing layer 100 and the second sound absorbing layer 300 are fixed to both sides of the sound insulating layer 200, respectively, and are tightly bonded to the sound insulating layer 200, thereby forming a laminated structure of the first sound absorbing layer 100, the sound insulating layer 200, and the second sound absorbing layer 300. Here, the first sound absorbing layer 100 and the second sound absorbing layer 300 may be bonded to both surfaces of the sound insulating layer 200, or may be fixed to both surfaces of the sound insulating layer 200 by a fixing member, and the fixing method of the first sound absorbing layer 100, the second sound absorbing layer 300, and the sound insulating layer 200 is not limited in this embodiment. In practical application, the first sound absorption layer 100 faces the engine compartment, the second sound absorption layer 300 faces the cab, the second sound absorption layer 300 is fixedly connected to a front baffle of the automobile, and the front baffle of the automobile is arranged between the second sound absorption layer 300 and the cab and used for isolating the cab from the engine compartment. In the running process of the automobile, the noise generated by the running of the engine is absorbed by the first sound absorption layer 100, isolated by the sound insulation layer 200 and secondarily absorbed by the second sound absorption layer 300, so that the noise generated by the engine can be effectively reduced. Wherein, puigging 200 is the PP layer of being made by polypropylene, cross-linking promoter, foaming auxiliary agent, and compared with current EVA, EPDM material, the weight of PP layer is lighter.
In order to improve the absorption of noise sound waves, through holes are formed in the second sound absorbing layer 300, preferably, the first sound absorbing layer 100 is made of sound absorbing cotton, and the second sound absorbing layer 300 is a PU foam layer made of polyurethane, wherein the sound absorbing cotton may be bi-component sound absorbing cotton or film-coated sound absorbing cotton. The soundproof layer 200 has a density of 100kg/m3The thickness is 3-5mm, and the density of the second sound-absorbing layer 300 is 35kg/m3The thickness is 15 to 20mm, and preferably, the thickness of the soundproof layer 200 is 4mm, and the thickness of the second sound-absorbing layer 300 is 18 mm. Inhale cotton and polyurethane of sound and be loose porous material, inside has the through-hole that link up each other, and after the sound wave entering of external noise inhales cotton or polyurethane of sound, the noise sound wave received the friction of air molecule, viscous resistance and makes and inhale the inside tiny fiber vibration of cotton or polyurethane of sound and do work, changes the noise sound wave into heat energy and consumes, and then realizes the absorption to the noise sound wave. The present embodimentIn the middle, the second sound absorbing layer 300 is a polyurethane foam sheet, specifically, the second sound absorbing layer is obtained by foaming polyurethane and then cutting the polyurethane into a sheet with a predetermined thickness, and the polyurethane foam sheet has low density, so that the weight of the automobile front wall sound insulating pad can be further reduced.
As shown in fig. 2, in order to further improve the sound insulation performance, a plurality of sound insulation elements 310 are embedded in the second sound absorbing layer 300 of the present embodiment, and the sound insulation elements 310 are hollow structural members. Preferably, the sound insulation member 310 is a spherical structure, wherein the sound insulation member 310 is glass beads made of silica. The glass beads are uniformly dispersed in the polyurethane foam sheet, in a specific example of the present embodiment, the glass beads may be disposed in the polyurethane foam layer in an n × m structure, for example, a plurality of layers of glass beads are disposed in the polyurethane foam layer, each layer of glass beads is arranged in an n × m structure, the glass beads of each layer may be aligned one by one, or may be staggered, that is, the glass beads of the first row and the first column of the first layer and the glass beads of the first row and the first column of the second layer may be disposed in alignment, or the glass beads of the first row and the first column of the second layer may be disposed in alignment with the gaps between the glass beads of the first row and the first column of the first layer and the glass beads of the first row and the second column of the first layer, and the glass beads of the first row and the second column of the second layer may be disposed in alignment with the gaps between the glass beads of the first row and the second column of the first row and the glass beads of the first row and the, and so on; in another specific example of this embodiment, the glass beads are multiple layers, and each layer is arranged in a star-shaped structure, wherein each layer of glass beads may be aligned one by one or staggered, and details are not repeated here. Because the interior of the glass beads is hollow, noise can be effectively isolated, and simultaneously, each glass bead and the polyurethane foaming sheet form a small mass spring, so that the resonance frequency of the polyurethane foaming sheet can be effectively reduced, and the sound insulation performance of the polyurethane foaming sheet is improved; and the polyurethane foaming sheet and the PP layer form a large mass spring, so that resonance is further reduced, and the sound insulation performance of the PP layer and the polyurethane foaming layer is further improved.
In this embodiment, first sound-absorbing layer 100, sound-insulating layer 200 and second sound-absorbing layer 300 are fixed through the bonding of adhesive, because can produce a large amount of vibrations in the car operation process, in order to enclose the life-span of sound-insulating pad before the extension car, avoid enclosing the sound-insulating pad before the car and lead to first sound-absorbing layer 100 because of long-term vibration, the separation of sound-insulating layer 200 and second sound-absorbing layer 300, dislocation, thereby cause the sound insulation performance of enclosing the sound-insulating pad before the car to descend, be provided with the bellying on sound-insulating layer 200 of this embodiment, be provided with the depressed part on first sound-absorbing layer 100, depressed part and bellying block, as preferred, the bellying is the setting of S type, the bellying matches with the depressed part. For example, in order to enable the sound-absorbing cotton to be matched with the PP layer, a base may be disposed on a side of the first sound-absorbing layer 100 close to the sound-insulating layer 200, the base may be made of polypropylene or other materials, an S-shaped concave portion matched with the S-shaped convex portion of the sound-insulating layer 200 is disposed on a side of the base close to the sound-insulating layer 200, and the sound-absorbing cotton is fixed on a side of the base away from the sound-insulating layer 200, so that the sound-absorbing cotton is matched with the PP layer through the base; the sound-absorbing cotton can be directly adhered to the sound-insulating layer 200, and due to the protruding portions on the sound-insulating layer 200, corresponding concave portions are formed on the side, close to the sound-insulating layer 200, of the sound-absorbing cotton. Thus, when the first sound absorbing layer 100 and the sound insulating layer 200 are bonded by using the adhesive, the S-shaped concave portion of the first sound absorbing layer 100 is engaged with the S-shaped convex portion of the sound insulating layer 200, so that the surface contact area between the first sound absorbing layer 100 and the sound insulating layer 200 is greatly increased, and the adhesive property thereof is remarkably improved, and simultaneously, the first sound absorbing layer 100 and the sound insulating layer 200 are mutually limited due to the engagement of the concave portion of the first sound absorbing layer 100 and the convex portion of the sound insulating layer 200, so that the vibration resistance of the first sound absorbing layer 100 and the sound insulating layer 200 is further improved. Meanwhile, in order to increase the contact area between the second sound-absorbing layer 300 and the sound-insulating layer 200, an S-shaped convex portion may be provided on the side of the sound-insulating layer 200 close to the second sound-absorbing layer 300, and a corresponding and matching S-shaped concave portion may be provided on the side of the second sound-absorbing layer 300 close to the sound-insulating layer 200. In the present embodiment, the convex portions provided on the sound-insulating layer 200 may be in a grid pattern, or may be distributed in a plurality of rows on the sound-insulating layer 200, and accordingly, the concave portions of the first sound-absorbing layer 100 or the second sound-absorbing layer 300 corresponding to the sound-insulating layer 200 may be in a grid pattern, or may be distributed in a plurality of rows on the sound-insulating layer 200.
Compare with the automobile of current soft felt + membrane + hard felt before enclosing sound-proof pad, enclose sound-proof pad before the automobile of this embodiment than its weight reduction 0.5kg-1kg, compare and enclose sound-proof pad before the automobile of current soft felt + membrane + hard felt, enclose sound-proof pad before the automobile of this embodiment has better sound insulation performance and sound absorption performance. The following explains the sound insulation performance and the sound absorption performance of the automobile front wall sound insulation pad of the embodiment and the existing automobile front wall sound insulation pad of the soft felt + membrane + hard felt with experimental data, and the experimental process is the prior art and is not repeated herein. As shown in fig. 3, which is a comparison graph of the sound insulation performance of the automotive front wall sound insulation pad of the present embodiment and the automotive front wall sound insulation pad of the conventional soft felt + membrane + hard felt, the abscissa in the graph is the sound frequency, and the ordinate is the sound insulation amount, as can be seen from fig. 3, when the sound frequency is greater than 2000hz, the sound insulation amount of the automotive front wall sound insulation pad of the present embodiment starts to be greater than that of the automotive front wall sound insulation pad of the conventional soft felt + membrane + hard felt, and as the sound frequency becomes greater, the difference between the sound insulation amount of the automotive front wall sound insulation pad of the present embodiment and that of the automotive front wall sound insulation pad of the conventional soft felt + membrane + hard felt becomes greater, that is, when the sound frequency is greater than 2000hz, the automotive front wall sound insulation pad of the present embodiment has better sound insulation performance, and the noise generated by the engine during the driving of the automobile is mostly high-frequency noise, therefore, the automotive front wall sound insulation pad of the present embodiment can better insulate the cabin noise of the engine than the conventional automotive front wall sound insulation pad. As shown in fig. 4, the experimental comparison graph of the sound absorption performance of the automobile front wall sound insulation pad of the embodiment is compared with the existing automobile front wall sound insulation pad of soft felt + membrane + hard felt, the abscissa in the graph is sound frequency, and the ordinate is sound absorption coefficient, as can be seen from fig. 4, the sound absorption coefficient of the automobile front wall sound insulation pad of the embodiment is obviously higher than that of the existing automobile front wall sound insulation pad of soft felt + membrane + hard felt, therefore, the automobile front wall sound insulation pad of the embodiment has better sound absorption performance compared with the prior art.
In a second aspect of the present invention, there is provided an automobile, including the automobile lightweight front wall sound insulation pad.
In conclusion, this embodiment is through will inhaling the sound cotton first sound absorbing layer of material, the puigging of polypropylene material and the second sound absorbing layer of polyurethane foam material and range upon range of setting gradually, and set up a plurality of hollow glass microballons in the second sound absorbing layer to enclose the pad that gives sound insulation before comparing current car, the effectual sound insulation performance who encloses the pad that gives sound insulation before the car that has improved, the effectual weight that encloses the pad that gives sound insulation before the car that has reduced simultaneously.
The present invention has been described in detail with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the details of the above embodiments, and the technical idea of the embodiments of the present invention can be within the scope of the present invention, and can be modified to various simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content of the embodiments of the present invention should be considered as the same as long as it does not violate the idea of the embodiments of the present invention.
Claims (10)
1. The utility model provides a enclose before car lightweight and give sound insulation and fill up which characterized in that includes:
the sound insulation layer comprises a first sound absorption layer, a sound insulation layer and a second sound absorption layer which are arranged in a stacked mode; the sound insulation layer is arranged between the first sound absorption layer and the second sound absorption layer; the second sound-absorbing layer is internally embedded with a plurality of sound-insulating elements which are hollow structural members.
2. The automobile lightweight front wall sound insulation mat according to claim 1, wherein the first sound absorption layer is made of sound absorbing cotton, and the second sound absorption layer is made of polyurethane.
3. The automobile lightweight front wall sound insulation pad according to claim 2, wherein the sound-absorbing cotton is two-component sound-absorbing cotton or film-coated sound-absorbing cotton.
4. The automobile lightweight front wall sound insulation mat according to claim 1, wherein the sound insulation layer is made of polypropylene.
5. The automotive light-weighted cowl sound insulating mat according to claim 1, wherein the sound insulating member is a spherical structural member.
6. The automotive light-weighted cowl sound insulating mat according to claim 1, wherein the sound insulating member is made of silica.
7. The automotive lightweight cowl mat according to claim 1, wherein a through hole is formed in the second sound-absorbing layer.
8. The automotive lightweight cowl sound insulating mat according to claim 1, wherein a protrusion is provided on the sound insulating layer, a recess is provided on the first sound absorbing layer, and the recess engages with the protrusion.
9. The automotive light-weight cowl sound insulating mat according to claim 8, wherein the protrusion is provided in an S-shape, and the protrusion is matched with the recess.
10. An automobile, characterized by comprising the automobile lightweight cowl louver blade according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022422990.1U CN213619631U (en) | 2020-10-27 | 2020-10-27 | Enclose before car lightweight and give sound insulation and fill up and car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022422990.1U CN213619631U (en) | 2020-10-27 | 2020-10-27 | Enclose before car lightweight and give sound insulation and fill up and car |
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| CN213619631U true CN213619631U (en) | 2021-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113682004A (en) * | 2021-09-29 | 2021-11-23 | 无锡吉兴汽车部件有限公司 | Lightweight sound insulation pad and preparation method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113682004A (en) * | 2021-09-29 | 2021-11-23 | 无锡吉兴汽车部件有限公司 | Lightweight sound insulation pad and preparation method and application thereof |
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