CN203637730U - Vibration reducing and sound absorbing pad for automotive back side wall - Google Patents
Vibration reducing and sound absorbing pad for automotive back side wall Download PDFInfo
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- CN203637730U CN203637730U CN201320691662.9U CN201320691662U CN203637730U CN 203637730 U CN203637730 U CN 203637730U CN 201320691662 U CN201320691662 U CN 201320691662U CN 203637730 U CN203637730 U CN 203637730U
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Abstract
The utility model discloses a vibration reducing and sound absorbing pad for an automotive back side wall. 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 water-repellency non-woven fabric as a water and dust preventing layer; 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 with the middle layer and the middle layer is bonded with the bottom layer by adopting flame retardant glue.
Description
technical field
the utility model relates to automobile manufacturing field, the vibration damping sound-absorbing pad that particularly a kind of automotive back encloses.
background technology
along with social development, automobile becomes the traffic means of transport that people are indispensable.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.
automobile body side wall is owing to there being seal case strength beam structure, so there is bypass cavity structure, while running at high speed, can produce High Speed Airflow Within at gusset, gusset High Speed Airflow Within is to produce the root that cavity wind is made an uproar and transmitted car external noise, therefore suppresses wind and makes an uproar and must block cavity air-flow with external noise.
automotive back encloses present position and is often subject to rain erosion, water stain more, 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.
current automotive back encloses vibration damping sound-absorbing and often adopts filling compressed sponge to clog rear side wall cavity, for blocking air-flow in cavity, but produces little effect.Cause the noise transmission of rear side wall simultaneously in compartment, affected ride-on vehicles comfort.
utility model content
for the noise of above-mentioned existence, the utility model adopts a kind of vibration damping sound-absorbing pad enclosing for automotive back to be divided into top layer, interlayer and bottom, it is characterized in that described top layer adopts to refuse water nonwoven fabrics as water proof and dust proof layer; 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 that described automotive back encloses, 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 that described automotive back encloses is 0.89dtex, and product pore-solids ratio is high, can promote absorption noise performance, effectively solves and imports the noise reso-nance problems causing in compartment into.
further, after the vibration damping sound-absorbing pad bottom that described automotive back encloses, be provided with gum, can directly vibration damping sound-absorbing pad be sticked on automobile door plate to easy construction.
adopt the technical program to have following beneficial effect:
(1) adopt after vibration damping sound-absorbing pad at rear side wall, can absorb and while starting motor-driven turning, import the high frequency acoustic pressure in compartment into.Use detest rear side wall vibration damping sound-absorbing pad that water material makes solved because of environment poor, the puzzlement that noise brings greatly.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.
(2) the PET fibrage in rear side wall damping sound-absorbing pad adopts and detests 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 detest the PET acoustical cotton that water cellulose is made, make fiber itself just there is the water of detesting characteristic, can adapt to better harsh environment in Vehicle Driving Cycle process, product uses ultra-fine 0.89 dtex fiber heat bonding to make simultaneously, there is better lapping level, increase space, made noise in the process being delivered in car body, had more path to absorb, transform noise.
accompanying drawing explanation
fig. 1 is the utility model structural representation;
fig. 2 is that the utility model uses view;
in its figure: 1-refuses water nonwoven layer; 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-rear side wall.
the specific embodiment
the utility model illustrates specific implementation method using Fig. 2 as most preferred embodiment, and Fig. 1 is that automotive back encloses schematic diagram, and Fig. 2 is that automotive back encloses the effect schematic diagram using after damping sound-absorbing pad;
the vibration damping sound-absorbing pad enclosing for automotive back as shown in Figure 1, is divided into top layer, interlayer and bottom, it is characterized in that described top layer adopts to refuse water nonwoven fabrics as water proof and dust proof layer 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.
and this vibration damping sound-absorbing pad light weight, lightweight is the megatrend of whole automobile manufacturing field development, can not increase too many vehicle body deadweight, thereby reduced oil consumption after construction.Adopt aluminium foil layer 5 as thermal insulation layer, can effectively stop that external heat is in compartment, in heat insulation, install and use procedure in cracky not, be difficult for agingly, weather resistance is good, long service life.At bottom--after aluminium foil layer, be laid with gum layer 6.When installation, can directly vibration damping sound-absorbing pad 8 be torn to gum layer 6 and be applied to automotive back and place, easy construction.
employing refuse water nonwoven fabrics as water proof and dust proof layer 1 as top layer, it is moderate as water proof and dust proof layer softness, waterproof, deadweight that this refuses water nonwoven fabrics, environmental protection, long service life.
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 (3)
1. the vibration damping sound-absorbing pad enclosing for automotive back, is divided into top layer, interlayer and bottom, it is characterized in that described top layer adopts to refuse water nonwoven fabrics as water proof and dust proof layer; 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 enclosing for automotive back 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 enclosing for automotive back as claimed in claim 1, is characterized in that the water cellulose of refusing in described PET fibrage is 0.89dtex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320691662.9U CN203637730U (en) | 2013-11-05 | 2013-11-05 | Vibration reducing and sound absorbing pad for automotive back side wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320691662.9U CN203637730U (en) | 2013-11-05 | 2013-11-05 | Vibration reducing and sound absorbing pad for automotive back side wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203637730U true CN203637730U (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320691662.9U Expired - Fee Related CN203637730U (en) | 2013-11-05 | 2013-11-05 | Vibration reducing and sound absorbing pad for automotive back side wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203637730U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106079797A (en) * | 2016-08-02 | 2016-11-09 | 常熟市嘉淀纺织有限公司 | One quickly disappears hot Sound-proof material |
| CN106882128A (en) * | 2017-03-22 | 2017-06-23 | 山东国金汽车制造有限公司 | A kind of automobile is left back to enclose lower backplate |
-
2013
- 2013-11-05 CN CN201320691662.9U patent/CN203637730U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106079797A (en) * | 2016-08-02 | 2016-11-09 | 常熟市嘉淀纺织有限公司 | One quickly disappears hot Sound-proof material |
| CN106882128A (en) * | 2017-03-22 | 2017-06-23 | 山东国金汽车制造有限公司 | A kind of automobile is left back to enclose lower backplate |
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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 |