CN203637731U - Vibration reducing and sound absorbing pad for automotive side protecting plate - Google Patents
Vibration reducing and sound absorbing pad for automotive side protecting plate Download PDFInfo
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- CN203637731U CN203637731U CN201320691685.XU CN201320691685U CN203637731U CN 203637731 U CN203637731 U CN 203637731U CN 201320691685 U CN201320691685 U CN 201320691685U CN 203637731 U CN203637731 U CN 203637731U
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Abstract
The utility model discloses a vibration reducing and sound absorbing pad for an automotive side protecting plate. The vibration reducing and sound absorbing pad is divided into a top layer, a middle layer and a bottom layer. The vibration reducing and sound absorbing pad is characterized in that the top layer adopts a foamed silica gel plate; the middle layer is a sound absorbing layer which is divided into three layers; the middle layer is a high-damping vibration reducing rubber layer; PET fiber layers made of water-repellency fibers are arranged on two sides of the high-damping vibration reducing rubber layer; the bottom layer adopts an aluminum foil as a heat insulating layer; the top layer is bonded to the middle layer and the middle layer is bonded to the bottom layer by adopting flame retardant glue.
Description
Technical field
the utility model relates to automobile manufacturing field, particularly a kind of vibration damping sound-absorbing pad for automobile side backplate.
Background technology
along with automobile progresses into family, car owner more and more focuses on driving quality, also further lies in the noise while travelling.In fact, the noise in compartment is enough to affect passenger's the listening to of talk, music, the mood of even driving.
automobile is the complex combination formula noise source of a high-speed motion.The vibrations that produce when automotive engine and driving system work, the effect of middle motor tire rolling, vehicle body and the air on the ground of running at high speed are the basic reasons that produces car noise.Car noise main source is divided into by position: engine noise, tire noise, wind noise; Can be divided into by route of transmission: structureborne noise, noise of air, sympathetic response noise; Wherein engine noise derives from the vibrations of the each parts of driving engine, impact, the piston up-down bent axle of burning outburst rotates the noise causing.
automobile side guard plate used is arranged on bottom of car mostly, air conditioner housing, middle control case and carpet adjacent, and this side guard plate plays and covers centre gangway, sets off the effect of vehicle modeling atmosphere by contrast.The driver's side backplate the inside of current most cars does not have sound absorption materials, even if having, is only the technological means that adopts sound insulation or sound-absorbing yet.
the shell of automobile is to be all generally made up of sheet metal, in Vehicle Driving Cycle process, focus is passed to car body its vibrations, in car body, propagate with elastic wave form, when being excited to shake, these thin plates can produce noise, cause the vibrations of other parts on car body, these parts are again to external irradiation noise simultaneously.Noise in automobile finite space comprises through noise and reflection noise two parts.
therefore, for automobile noise reduction, it is inadequate only adding sound-absorbing aerated materials or only adding sound insulation or damping material, and vibration damping and sound-absorbing need to carry out simultaneously.
sound-absorbing is with referring to that passive type material changes sound wave line of propagation, to absorb its energy.Vibration damping is to prevent that noise from propagating and causing body oscillating in sound wave mode, thereby weakens noise.
because the sound absorption factor of aerated materials is subject to the impact of temperature, humidity.While use under high temperature or cryogenic conditions, the velocity of sound changing because of temperature traverse will cause the change of wave length of sound, thereby the sound absorption frequency-response data of material is relatively moved, and its variation tendency is generally that temperature improves, and sound absorption characteristics move to high frequency direction; Temperature reduces, and sound absorption characteristics move to low frequency direction.Humidity also has considerable influence to the sound absorbing capabilities of material, the intrapore aqueous ingredients of material increases the reduction that has caused pore-solids ratio, along with increasing of aqueous ingredients, first the coefficient of sound-absorption that is high-frequency range declines, when aqueous ingredients continues to increase, incidence is expanded to low frequency region thereupon, easily causes product failure.
therefore, conventional single porous sound absorbing material can not meet vibration damping sound-absorption requirement in compartment.
utility model content
for the noise of above-mentioned existence, the utility model adopts a kind of vibration damping sound-absorbing pad for automobile side backplate, is divided into top layer, interlayer and bottom, it is characterized in that described top layer adopts foamed silica gel plate; Described interlayer is sound absorbing layer, and described sound absorbing layer is divided into three layers, and centre is high damping vibration attenuation rubber layer, and high damping vibration attenuation rubber layer both sides are to refuse the PET fibrage that water cellulose is made; Described bottom adopts aluminium foil as thermal insulation layer; Between described top layer and interlayer, interlayer and bottom, adopt fire retardant glue bonding.
further, in the vibration damping sound-absorbing pad of described automobile side backplate, PET fiber layer thickness, between 17mm and 50mm, can be filled re-entrant portion effectively.
further, the water cellulose of refusing in the vibration damping sound-absorbing pad of described automobile side backplate is 0.89dtex, product pore-solids ratio is high, can promote absorption noise performance, makes an uproar and import the noise reso-nance problems causing in compartment in the road that while effectively solving running car, wind is made an uproar, tire and ground friction produce.
further, the vibration damping sound-absorbing pad bottom back of the automobile side backplate of described automobile side backplate is provided with gum, can directly vibration damping sound-absorbing pad be sticked on automobile side backplate to easy construction.
adopt the technical program to have following beneficial effect:
(1) in vibration damping sound-absorbing pad, add high damping vibration attenuation rubber, the existing elastomeric state of this vibration isolation rubber has again high glutinous state, has good vibration damping, buffering, sound insulation value,
in the driving process of automobile, car body is passed in vibrations by focus, in car body, propagate with elastic wave form, auto body is as metal case, when being excited to shake, thin plate can produce noise, cause the vibrations of other parts on car body, these parts, again to external irradiation noise, add this high damping vibration attenuation rubber can play the effect of the resonance of reinforcing body construction and control car body and community noise simultaneously.This is because paste after vibration damping/sound absorbing material, can change the natural frequency in railway carriage, controls resonance and sympathetic response that pass-by noise and car body produce, thereby effectively completely cuts off, absorption of noise, realizes the object of vibration and noise reducing.
(2) in vibration damping sound-absorbing pad, add porous PET fibrage, can absorb the extraneous high frequency acoustic pressure in compartment of importing into.Sound-absorbing porous material has the minim gap that is interlinked to the outside in many and hole continuously, in the time that sound wave incides material surface, a part reflects at material surface, when a part enters material internal along pore, cause air vibration in hole, produce friction with hole wall, effect near the air of hole wall and fiber surface because of friction force and viscous force, make quite a few acoustic energy be converted into heat energy and be consumed, make acoustic attenuation, reflective sound wave weakens and reaches sound-absorbing effect.
(3) PET fibrage adopts and refuses water cellulose and make, and PET itself, containing additive, accomplish 100% recyclable recycling, and this product is not environment friendly and pollution-free.
(3) use and refuse the PET fibrage that water cellulose is made, make fiber itself just there is the water of refusing characteristic, can adapt to better in Vehicle Driving Cycle process the harsies environment such as rainwater.
(4) vibration damping sound-absorbing pad uses ultra-fine 0.89 dtex fiber heat bonding to make, and has better lapping level, has increased space, makes noise in the process being delivered in car body, has more path to transform the noise that absorbs automobile side backplate position.
accompanying drawing explanation
fig. 1 is the utility model structural representation;
fig. 2 is that the utility model uses view;
in its figure: 1-foamed silica gel plate; 2-PET fibrage 1; 3-high damping vibration attenuation rubber layer; 4-PET fibrage 2; 5-aluminium foil layer; 6-gum; 7-vibration damping sound-absorbing pad; 8-side guard plate.
the specific embodiment
the utility model illustrates specific implementation method using Fig. 1 as most preferred embodiment:
a vibration damping sound-absorbing pad for automobile side backplate, is divided into top layer, interlayer and bottom as shown in Figure 1, it is characterized in that described top layer adopts foamed silica gel plate 1; Described interlayer is sound absorbing layer, and described sound absorbing layer is divided into three layers, and centre is high damping vibration attenuation rubber layer 3, and high damping vibration attenuation rubber layer both sides are to refuse the PET fibrage 2,4 that water cellulose is made; Described bottom adopts aluminium foil layer 5 as thermal insulation layer; Between described top layer and interlayer and bottom, adopt fire retardant glue bonding.
bottom adopts aluminium foil layer 5 as thermal insulation layer, can effectively stop that external heat is in compartment.At bottom--after aluminium foil layer, be laid with gum 6.When installation, can directly tear gum layer and be applied to relevant position, cracky not in use procedure, be difficult for aging, long service life.
interlayer, as sound absorbing layer, adds high damping vibration attenuation rubber layer 3 therein, and this vibration isolation rubber not only has elastomeric state but also have high glutinous state, has good vibration damping, buffering, sound insulation value.Because producing vibrations in the driving process of automobile, car body is passed in vibrations by focus, in car body, propagates with elastic wave form, auto body is as metal case, when thin plate is excited to shake, can produce noise, cause the vibrations of other parts on car body simultaneously, these parts are again to external irradiation noise.Adopt the propagation shaking that can completely cut off or decay of high damping vibration attenuation rubber, realize the object of vibration and noise reducing.
pET fibrage 2,4 employings of interlayer are refused water cellulose and are made, because fiber itself just has the water of refusing characteristic, can adapt to better the harsh environment of automobile side backplate position in Vehicle Driving Cycle process, and itself is not containing any additive, in the time of burning, can not send penetrating odor, realize environment-protecting asepsis, can not produce infringement to ambient environment.
adopt foamed silica gel plate 1 as top layer, this foamed silica gel plate softness, nonflammable, waterproof, deadweight are moderate, environmental protection, and soundproof effect and damping effect are good, long service life.
this vibration damping sound-absorbing pad light weight, and lightweight is the megatrend of whole automobile manufacturing field development, can not increase too many vehicle body deadweight after construction, thus reduce oil consumption.
the foregoing is only a preferred embodiment of the present utility model; can not limit protection domain of the present utility model with it; the utility model also can have other structural change; as long as the equalization of doing according to protection domain of the present utility model changes and modifies, all should belong in the scope that the utility model contains.
Claims (4)
1. for a vibration damping sound-absorbing pad for automobile side backplate, be divided into top layer, interlayer and bottom, it is characterized in that described top layer adopts foamed silica gel plate; Described interlayer is sound absorbing layer, and described sound absorbing layer is divided into three layers, and centre is high damping vibration attenuation rubber layer, and high damping vibration attenuation rubber layer both sides are to refuse the PET fibrage that water cellulose is made; Described bottom adopts aluminium foil as thermal insulation layer; Between described top layer and interlayer, interlayer and bottom, adopt fire retardant glue bonding.
2. the vibration damping sound-absorbing pad of automobile side backplate as claimed in claim 1, is characterized in that described PET fiber layer thickness is between 17mm and 50mm.
3. the vibration damping sound-absorbing pad of automobile side backplate as claimed in claim 1, is characterized in that the water cellulose of refusing in described PET fibrage is 0.89dtex.
4. the vibration damping sound-absorbing pad of automobile side backplate as claimed in claim 1, is characterized in that described bottom back is provided with gum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320691685.XU CN203637731U (en) | 2013-11-05 | 2013-11-05 | Vibration reducing and sound absorbing pad for automotive side protecting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320691685.XU CN203637731U (en) | 2013-11-05 | 2013-11-05 | Vibration reducing and sound absorbing pad for automotive side protecting plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203637731U true CN203637731U (en) | 2014-06-11 |
Family
ID=50868999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320691685.XU Expired - Fee Related CN203637731U (en) | 2013-11-05 | 2013-11-05 | Vibration reducing and sound absorbing pad for automotive side protecting plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203637731U (en) |
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2013
- 2013-11-05 CN CN201320691685.XU patent/CN203637731U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20211105 |