CN201736923U - Automotive front wall sound insulation pad - Google Patents
Automotive front wall sound insulation pad Download PDFInfo
- Publication number
- CN201736923U CN201736923U CN2010202342373U CN201020234237U CN201736923U CN 201736923 U CN201736923 U CN 201736923U CN 2010202342373 U CN2010202342373 U CN 2010202342373U CN 201020234237 U CN201020234237 U CN 201020234237U CN 201736923 U CN201736923 U CN 201736923U
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- absorbing layer
- sound
- sound absorbing
- sound insulation
- automobile
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Abstract
The utility model discloses an automotive front wall sound insulation pad which provides an automotive front wall sound insulation pad with simple structure and favorable sound insulating and noise reducing effect, especially can cut off engine noise and has certain vibration reducing function. The utility model solves the technical problems in the prior art that the sound insulation pad has the function of insulating sound in a certain frequency range, and has small action on low frequency sound, especially sound of the frequency under 1000 Hz, so the sound insulating and noise reducing effect is poor, the noise in the automobile is large, and the driving comfortableness is obviously affected. The sound insulation pad comprises an internal sound absorbing layer and an external sound absorbing layer which have gram weight difference. The internal sound absorbing layer is arranged insides and faces to the inside of the automobile, the external sound absorbing layer is arranged outsides and faces to the engine, and the external sound absorbing layer is fixed to the inner side of the front metal plate of the automobile. A sound insulation and vibration reduction layer made by modified rubber is clamped between the internal sound absorbing layer and the external sound absorbing layer.
Description
Technical field
The utility model relates to a kind of vehicle noise insulation pad, relate in particular to a kind of be fixed in the car body before enclose on the panel beating, enclose sound insulating pad before can obviously reducing the automobile of internal car noise.
Background technology
For automobile, NVH performance (noise, vibration and traveling comfort) is to weigh the important indicator of vehicle performance, in order to promote the NVH performance, generally be to enclose sound insulating pad before in the crew module, setting up corresponding to the inboard of automobile dash shield gold, but the soundproof effect that encloses sound insulating pad before commonly used is poor, can only play deadening to the noise of a certain frequency limit, and for low-frequency noise, especially the noise contributions below the 1000Hz is very little, therefore cause internal car noise big, especially can't cut off motor noise, have a strong impact on to take advantage of and driven traveling comfort.
Chinese patent discloses a kind of sound insulating and absorbing mat structure of automobile (CN101570151A), the sound absorbing layer that it is positioned at the waterproof layer on upper strata by one at least and is positioned at lower floor is formed, the waterproof layer on described upper strata is made as foamed materials, and the sound absorbing layer of lower floor is made as the tailor's cushion cotton with sound-absorbing effect, more can add blanket class and thermoplastic elastomer TPE material even on the waterproof layer, each layer member fitted, and also nationality is one-body molded by mould pressing technology.This device is to improve soundproof effect by set up the sound absorbing layer that one deck made by the tailor's cushion cotton below the waterproof layer of mat, but the sound absorbing layer that waterproof layer that foamed materials is made and tailor's cushion cotton are made can only play deadening to the noise in a certain frequency limit equally, and for low-frequency noise, especially the noise contributions below the 1000Hz is very little, therefore the sound insulation and noise reduction weak effect has reduced to take advantage of and has driven traveling comfort.
Summary of the invention
The utility model mainly provided a kind of simple in structure, sound insulation and noise reduction is effective, enclose sound insulating pad before especially can cutting off motor noise and having the automobile of certain vibration-damping function, solved the sound insulating pad that exists in the prior art and can only play deadening the noise of a certain frequency limit, and for low-frequency noise, especially the following noise contributions of 1000Hz is very little, cause sound insulation and noise reduction weak effect, internal car noise big, have a strong impact on and take advantage of the technical matters of driving traveling comfort etc.
Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals: enclose sound insulating pad before a kind of automobile, comprise the interior sound absorbing layer and the outer sound absorbing layer that there are the grammes per square metre difference, described in sound absorbing layer interior towards body inner side, described outer sound absorbing layer is outside towards driving engine and the inboard of enclosing panel beating before being fixed on automobile, in described sound absorbing layer and outside be folded with the sound insulation vibration damping layer of making by modified rubber between the sound absorbing layer.Can absorb crew module's noise by sound absorbing layer in being provided with, outer sound absorbing layer can absorb engine noise, sets up sound insulation vibration damping layer again between inside and outside sound absorbing layer, and three sound absorbing layers are simple in structure, improved the sound insulation and noise reduction ability; Grammes per square metre gradient by the material grammes per square metre difference of inside and outside sound absorbing layer forms has increased the flow resistance that sound wave passes through, and has further promoted sound insulation property; The sound insulation vibration damping layer density that modified rubber is made is big, makes noise reduction better; When the sound insulation vibration damping layer that modified rubber is made was followed the car load motion, the repeatedly repeated deformation of rubber made elastic energy change irreversible heat energy dissipation into, and the effect of damping vibration attenuation is arranged again thus.
Can be the grammes per square metre of the grammes per square metre of interior sound absorbing layer greater than outer sound absorbing layer, as preferably, described in sound absorbing layer and outer sound absorbing layer make by the PET lamination coating, the thickness of interior sound absorbing layer is that 5mm to 15mm, grammes per square metre are 400g/m
2To 800 g/m
2The thickness of outer sound absorbing layer 2 is that 10mm to 20mm, grammes per square metre are 800g/m
2To 1200 g/m
2PET lamination coating cost is low, intensity is high, excellent noise reduction effect; In order to save cost, under the prerequisite that guarantees soundproof effect, be high grammes per square metre PET fiber towards the outer sound absorbing layer that starts pusher side, be low grammes per square metre PET fiber towards the interior sound absorbing layer of crew module's side.
As preferably, described in the fibre section shape of sound absorbing layer and outer sound absorbing layer triangular in shape.Compare with common cylindrical fibre cross section, when the cross section of lamination coating is special triangle, it is more complicated to make sound wave face the fibre section form, perimeter of section is longer, the contact surface of air and fiber is more, so just increase the chance that sound wave contacts with more contact surfaces, thereby improved sound insulation property.
As preferably, described sound insulation vibration damping layer is a metal powder modified butyl rubber material, and its thickness is that 1.5mm to 3mm, density are 1.4 g/cm
3To 1.8 g/cm
3Because the metal powder modified butyl rubber is formulated by reaction by butyl rubber, metal powder and each analog assistant, when the vehicle body steel plate vibrates, the macromolecular chain of rubber produces motion, repeated deformations such as the repeatedly stretching that rubber produces, compression, shearing make system change a part of elastic energy into irreversible heat energy dissipation, thereby reach the purpose of damping vibration attenuation.In addition when material is subjected to vibration that strain takes place, metal powder helps to increase the shear deformation of interlayer poly-mer, because the interpolation of metal powder filler, limit the activity in the mutual transition process of molecule long-chain, strengthened the conversion of energy, improved the damping force characteristics of material, shock damping action has also been played in the friction of metal powder filler simultaneously, in glass transition region, the internal friction effect between filler and poly-mer and the filler increases with the aggravation of molecular motion, thereby has improved damping value; The density ratio lamination coating of metal powder modified butyl rubber material and the density of expanded material are big, and soundproof effect is good.
Therefore, enclosure sound spacer has following advantage before a kind of automobile of the present utility model: by three sound absorbing layers are set, improved sound insulation and noise reduction ability, simple in structure; The sound insulation vibration damping layer density that the metal powder modified rubber is made is big, makes noise reduction better, and the vibration damping of sound insulation simultaneously layer makes elastic energy change heat energy dissipation into when following the car load motion, plays damping of vibrations; There is certain difference in the material grammes per square metre of inside and outside sound absorbing layer, has increased the flow resistance that sound wave passes through, and has further promoted sound insulation property; Leg-of-mutton fibre section is increased the contact surface of sound wave and fiber, has improved sound insulation property.
Description of drawings:
Fig. 1 is a part sectional view of the present utility model.
The specific embodiment:
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment:
As shown in Figure 1, enclose in the sound insulating pad before a kind of automobile of the present utility model, comprise through cold-press process take shape in one interior sound absorbing layer 1, sound insulation vibration damping layer 3 and outside sound absorbing layer 2, interior sound absorbing layer 1 interior towards body inner side, outer sound absorbing layer 2 is outside towards driving engine and the inboard of enclosing panel beating 4 before being fixed on automobile, wherein interior sound absorbing layer 1 and outer sound absorbing layer 2 are made by fibre section shape PET lamination coating triangular in shape, and the thickness of interior sound absorbing layer 1 is that 10mm, grammes per square metre are 600g/m
2, the thickness of outer sound absorbing layer 2 is that 15mm, grammes per square metre are 1000g/m
2, sound insulation vibration damping layer 3 is made by metal powder modified butyl rubber material, and its thickness is that 2mm, density are 1.6 g/cm
3
During use, before being fixed on automobile, sound insulating pad encloses the panel beating inboard with before enclosing by buckle, three sound absorbing layer combineds action of making through two kinds of materials during normal vehicle operation, every layer performance all obtains good performance, interior sound absorbing layer 1 absorbs crew module's noise, outer sound absorbing layer 2 absorbs engine noise, the sound insulation value excellence, noise to each frequency limit all has good iris action, when the vehicle body steel plate vibrates, sound insulation vibration damping layer 3 used metal powder modified butyl rubber macromolecular chain produce motion, and rubber produces repeatedly repeated deformation makes the part elastic energy change heat energy dissipation into, reaches the vibration damping purpose.
Specific embodiment described herein only is that casehistory is made in design of the present utility model.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (5)
1. enclose sound insulating pad before an automobile, it is characterized in that: comprise the interior sound absorbing layer (1) and the outer sound absorbing layer (2) that there are the grammes per square metre difference, described in sound absorbing layer (1) interior towards body inner side, described outer sound absorbing layer (2) is outside towards driving engine and enclose the inboard of panel beating (4) before being fixed on automobile, sound absorbing layer in described (1) and outside be folded with the sound insulation vibration damping layer of making by modified rubber (3) between the sound absorbing layer (2).
2. enclose sound insulating pad before a kind of automobile according to claim 1, it is characterized in that: sound absorbing layer (1) and outer sound absorbing layer (2) are made by the PET lamination coating in described, and the thickness of interior sound absorbing layer (1) is that 5mm to 15mm, grammes per square metre are 400g/m
2To 800 g/m
2The thickness of outer sound absorbing layer (2) is that 10mm to 20mm, grammes per square metre are 800g/m
2To 1200 g/m
2
3. enclose sound insulating pad before a kind of automobile according to claim 1 and 2, it is characterized in that: the fibre section shape of sound absorbing layer (1) and outer sound absorbing layer (2) is triangular in shape in described.
4. enclose sound insulating pad before a kind of automobile according to claim 1 and 2, it is characterized in that: described sound insulation vibration damping layer (3) is a metal powder modified butyl rubber material, and its thickness is that 1.5mm to 3mm, density are 1.4 g/cm
3To 1.8 g/cm
3
5. enclose sound insulating pad before a kind of automobile according to claim 3, it is characterized in that: described sound insulation vibration damping layer (3) is a metal powder butyl rubber material, and its thickness is that 1.5mm to 3mm, density are 1.4 g/cm
3To 1.8 g/cm
3
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202342373U CN201736923U (en) | 2010-06-23 | 2010-06-23 | Automotive front wall sound insulation pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202342373U CN201736923U (en) | 2010-06-23 | 2010-06-23 | Automotive front wall sound insulation pad |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201736923U true CN201736923U (en) | 2011-02-09 |
Family
ID=43552205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202342373U Expired - Fee Related CN201736923U (en) | 2010-06-23 | 2010-06-23 | Automotive front wall sound insulation pad |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201736923U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102673490A (en) * | 2012-05-26 | 2012-09-19 | 无锡吉兴汽车声学部件科技有限公司 | Center console lower deadening pad for improving automotive acoustic performance |
| CN105538841A (en) * | 2015-12-30 | 2016-05-04 | 芜湖馨源海绵有限公司 | Sound-insulating pad used inside automobile and preparation process of sound-insulating pad |
| CN108248697A (en) * | 2018-01-26 | 2018-07-06 | 重庆千能实业有限公司 | A kind of antetheca harden structure of automobile |
| CN108248695A (en) * | 2018-01-30 | 2018-07-06 | 重庆千能实业有限公司 | A kind of front wall board of automobile assembly |
| CN108891106A (en) * | 2018-06-08 | 2018-11-27 | 昆山同昌汽车新材料有限公司 | A kind of structure and manufacturing process of sound insulating and absorbing front wall |
| CN110154935A (en) * | 2019-06-12 | 2019-08-23 | 奇瑞商用车（安徽）有限公司 | Body front wall sound insulating pad and electric car with it |
| CN112537263A (en) * | 2020-10-29 | 2021-03-23 | 安徽江淮汽车集团股份有限公司 | Automobile with noise reduction and sound collection device |
| CN114274521A (en) * | 2021-12-15 | 2022-04-05 | 东风汽车集团股份有限公司 | Processing method of sound absorption cotton, sound absorption cotton and wheel cover type sound absorption cotton |
-
2010
- 2010-06-23 CN CN2010202342373U patent/CN201736923U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102673490A (en) * | 2012-05-26 | 2012-09-19 | 无锡吉兴汽车声学部件科技有限公司 | Center console lower deadening pad for improving automotive acoustic performance |
| CN105538841A (en) * | 2015-12-30 | 2016-05-04 | 芜湖馨源海绵有限公司 | Sound-insulating pad used inside automobile and preparation process of sound-insulating pad |
| CN108248697A (en) * | 2018-01-26 | 2018-07-06 | 重庆千能实业有限公司 | A kind of antetheca harden structure of automobile |
| CN108248695A (en) * | 2018-01-30 | 2018-07-06 | 重庆千能实业有限公司 | A kind of front wall board of automobile assembly |
| CN108891106A (en) * | 2018-06-08 | 2018-11-27 | 昆山同昌汽车新材料有限公司 | A kind of structure and manufacturing process of sound insulating and absorbing front wall |
| CN110154935A (en) * | 2019-06-12 | 2019-08-23 | 奇瑞商用车（安徽）有限公司 | Body front wall sound insulating pad and electric car with it |
| CN110154935B (en) * | 2019-06-12 | 2021-06-01 | 奇瑞商用车（安徽）有限公司 | Enclose before automobile body and give sound insulation and fill up and have its electric automobile |
| CN112537263A (en) * | 2020-10-29 | 2021-03-23 | 安徽江淮汽车集团股份有限公司 | Automobile with noise reduction and sound collection device |
| CN114274521A (en) * | 2021-12-15 | 2022-04-05 | 东风汽车集团股份有限公司 | Processing method of sound absorption cotton, sound absorption cotton and wheel cover type sound absorption cotton |
| CN114274521B (en) * | 2021-12-15 | 2023-10-03 | 东风汽车集团股份有限公司 | Processing method of sound-absorbing cotton, sound-absorbing cotton and wheel cover type sound-absorbing cotton |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20140623 |
|
| EXPY | Termination of patent right or utility model |