CN213973867U - Noise-reduction heat insulation pad structure and vehicle - Google Patents
Noise-reduction heat insulation pad structure and vehicle Download PDFInfo
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- CN213973867U CN213973867U CN202022910233.9U CN202022910233U CN213973867U CN 213973867 U CN213973867 U CN 213973867U CN 202022910233 U CN202022910233 U CN 202022910233U CN 213973867 U CN213973867 U CN 213973867U
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Abstract
The utility model provides a heat insulating mattress structure and vehicle of making an uproar falls belongs to the technical field of making an uproar, including making an uproar the heat insulating mattress body that falls, fall the heat insulating mattress body that makes an uproar and be equipped with the resonant cavity, the open end of resonant cavity is towards the noise source. The utility model provides a heat insulating mattress structure of making an uproar falls sets up the resonant cavity on falling the thermal-insulated body of making an uproar, and the noise spreads into in the resonant cavity, and it is undulant to form the gas column, takes place friction and collision with the inner wall of resonant cavity, weakens noise propagation energy, reduces the low and medium frequency noise, and the high frequency noise also can be reduced based on the structure of falling the thermal-insulated body of making an uproar simultaneously. Therefore, the utility model provides a heat insulating mattress structure of making an uproar falls all has the effect of making an uproar to high, medium, low frequency noise.
Description
Technical Field
The utility model belongs to the technical field of make an uproar, more specifically say, relate to a heat insulating mattress structure and vehicle of making an uproar fall.
Background
With the increasing requirements of consumers on the driving comfort of automobiles, silence in the automobiles becomes an important performance of vehicle quality competition, and automobile noise is the problem to be solved for the driving comfort of the automobiles.
Engine noise is the main noise source of vehicles, and how to isolate engine noise is the key point of research of various vehicle enterprises. Among the prior art, mainly through enclose before enclosing seal, promote before enclosing sound insulation sound absorption performance, isolated engine noise, the defect of existence as follows:
(1) the measures of sealing and sound insulation and absorption are adopted, the characteristics of sound insulation and absorption materials are limited, the sound insulation and noise reduction is mainly aimed at medium-high frequency sound insulation and noise reduction, the thickness and the density of a sound insulation layer are required to be increased for noise reduction of medium-low frequency noise, the cost is high, and the vehicle weight is increased.
(2) The engine body noise is reduced, the medium and low frequency noise can be reduced, but the engine body noise is limited by the technical level and the processing technology, the technical difficulty is high, and the cost is high.
On the basis of the performance of the whole vehicle, the two measures are difficult to realize good sound insulation and noise reduction on the middle and low frequency noise, and the requirement of the vehicle on the silence of the sound and the comfort of the whole vehicle are influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a heat insulating mattress structure of making an uproar falls aims at solving current sound insulation and falls measure of making an uproar, and the problem of making an uproar falls in unable centering low frequency noise realization sound insulation.
In order to achieve the above object, the utility model adopts the following technical scheme: there is provided a noise reducing and heat insulating mat structure comprising: the thermal-insulated pad body of making an uproar falls, it is equipped with the resonant cavity to fall the thermal-insulated pad body of making an uproar, the open end of resonant cavity is towards the noise source.
As another embodiment of the present application, the noise reduction and heat insulation pad body is provided with a plurality of groups of resonant cavities which are uniformly distributed, and each group of resonant cavities comprises resonant cavities with different sizes and/or geometric shapes.
As another embodiment of the present application, the geometrical shape of the resonant cavity includes at least two of a circle, an ellipse, and a polygon.
As another embodiment of this application, the heat insulating mattress body of making an uproar falls includes range upon range of continuous first sound-absorbing layer, second puigging, third resonance noise damping layer and fourth sound-absorbing layer, be equipped with multiple geometry and the different through-hole of size on the third resonance noise damping layer, the second puigging seals the one end of through-hole, so that the through-hole forms the resonant cavity.
As another embodiment of the present application, the first sound absorbing layer and the fourth sound absorbing layer are both sound absorbing cotton layers.
As another embodiment of the present application, the second soundproof layer is an EVA layer.
As another embodiment of the present application, the thickness of the second soundproof layer is 1 to 5 mm.
As another embodiment of the present application, the third resonant sound-deadening layer is a PU foam layer.
As another embodiment of the present application, the thickness of the third resonance sound-deadening layer is 5 to 200 mm.
The utility model also provides a vehicle, install before the engine compartment of vehicle on enclosing the panel beating noise reduction heat insulating mattress structure.
The utility model provides a heat insulating mattress structure of making an uproar falls beneficial effect lies in: compared with the prior art, the utility model discloses heat insulating mattress structure of making an uproar falls sets up the resonant cavity on falling the thermal-insulated body of making an uproar, and the noise spreads into the resonant cavity into, forms the gas column undulant, takes place friction and collision with the inner wall of resonant cavity, weakens noise propagation energy, reduces the low and medium frequency noise, and the structure based on falling the thermal-insulated body of making an uproar simultaneously also can reduce high frequency noise. Therefore, the utility model provides a heat insulating mattress structure of making an uproar falls all has the effect of making an uproar to high, medium, low frequency noise.
The utility model provides a vehicle owing to installed foretell heat insulating mattress structure of making an uproar of falling on enclosing the panel beating before the engine compartment, can effectively reduce the engine low, well, high frequency noise, improves the silence nature of car internal environment to improve the quality of whole car. And because the heat insulating mattress body structure of making an uproar falls, the preparation is easy, simple to operate, and need not to change engine body structure, can not increase the cost of manufacture of whole car and whole car weight, can realize that the engine is low, medium, high frequency noise falls, can improve the competitive advantage of whole car.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic perspective view of a noise-reducing and heat-insulating pad structure provided in an embodiment of the present invention;
fig. 2 is a schematic side view of a noise reduction and heat insulation pad structure according to an embodiment of the present invention.
In the figure: 1. a first sound absorbing layer; 2. a second sound insulating layer; 3. a third resonant sound-deadening layer; 4. a fourth sound absorbing layer; 5. a resonant cavity is provided.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and fig. 2, the noise reduction and heat insulation pad structure of the present invention will now be described. The noise-reducing and heat-insulating pad structure comprises: the thermal-insulated pad body of making an uproar falls, falls the thermal-insulated pad body of making an uproar and is equipped with resonant cavity 5, and the open end of resonant cavity 5 is towards the noise source.
The utility model provides a heat insulating mattress structure of making an uproar falls compares with prior art, sets up resonant cavity 5 on falling the thermal-insulated body of making an uproar, and the noise spreads into resonant cavity 5 in, forms the gas column undulant, takes place friction and collision with resonant cavity 5's inner wall, weakens noise propagation energy, reduces the low and medium frequency noise, and the structure based on falling the thermal-insulated body of making an uproar simultaneously also can reduce high frequency noise. Therefore, the utility model provides a heat insulating mattress structure of making an uproar falls all has the effect of making an uproar to high, medium, low frequency noise.
The size of the resonant cavity 5 is designed according to the structure of different vehicle types and the engine frequency, so that the resonant cavity 5 can realize medium and low frequency noise elimination and energy absorption.
As a specific implementation manner of the noise-reduction and heat-insulation pad structure provided by the present invention, please refer to fig. 1 to 2, the noise-reduction and heat-insulation pad body is provided with a plurality of resonant cavity groups uniformly distributed, and each group of resonant cavity groups includes resonant cavities 5 of different sizes and/or geometric shapes. The combination of the resonant cavities 5 with different sizes and different geometric shapes can better absorb the noise energy of different frequencies and improve the noise reduction effect of the medium and low frequency noise.
Various combinations of resonant cavities 5 are exemplified below; first, circular and rectangular combinations; second, circular and triangular combinations; third, circular, rectangular and triangular combinations; fourth, oval, circular, rectangular, triangular combinations, etc., are not listed here. In addition, aiming at different combinations with different sizes, the circle comprises circular resonant cavities 5 with different diameters; the triangles comprise isosceles triangles and irregular triangles, and the sizes of the triangles can be different or the same; similarly, the length and the width of the rectangle can be the same or different, and the combination can combine the silencing resonant cavity with better noise reduction effect.
According to the frequency of the engine, resonant cavities 5 with different shapes and size combinations are designed, and the optimal noise reduction of medium and low frequency noise can be achieved.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 2, the geometric shape of the resonant cavity 5 includes at least two of a circle, an ellipse and a polygon. The polygon includes triangle, rectangle, pentagon, hexagon, etc., and is preferably a regular polygon.
As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 and fig. 2, the noise reduction and heat insulation pad body includes a first sound absorption layer 1, a second sound absorption layer 2, a third resonance sound absorption layer 3 and a fourth sound absorption layer 4 which are stacked and connected, a through hole with various geometric shapes and different sizes is provided on the third resonance sound absorption layer 3, and the second sound absorption layer 2 is sealed at one end of the through hole, so that the through hole forms a resonant cavity 5. After the Noise is transmitted to the Noise reduction and heat insulation pad body, the fourth sound absorption layer 4 absorbs the medium-high frequency Noise energy to realize primary Noise reduction, the third resonance sound absorption layer 3 weakens the medium-low frequency Noise energy to realize secondary Noise reduction, the second sound absorption layer 2 realizes tertiary Noise reduction, and the first sound absorption layer 1 absorbs the sound to reduce the Noise of the Noise source to the NVH level (Noise, Vibration and Harshness, Noise-Noise, Vibration and Harshness), so that the better Noise reduction effect is achieved.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 2, the first sound absorbing layer 1 and the fourth sound absorbing layer 4 are both sound absorbing cotton layers. The sound-absorbing cotton is of a multi-capillary fiber structure, so that medium and high frequency noise energy can be absorbed. In this embodiment, the first sound absorbing layer 1 and the fourth sound absorbing layer 4 are both 5 to 100mm thick.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 2, the second sound insulation layer 2 is an EVA (Ethylene Vinyl Acetate) layer. Because EVA structure density is big, the sound insulation is effectual, completely cuts off the intermediate frequency noise. And because the sound insulation layer has the effect of sound insulation and has larger density, the sound insulation layer is sealed at one end of the through hole to form the resonant cavity 5 with one sealed end, so that the energy of the medium and low frequency noise is weakened in the resonant cavity 5, and the effect of reducing the medium and low frequency noise is achieved.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 2, the thickness of the second sound insulation layer 2 is 1-5 mm.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 2, the third resonant sound-deadening layer 3 is a PU foam layer. The PU foam layer (Polyurethane) is a dense sponge layer, can effectively isolate medium and high frequency noise, and meanwhile, the PU foam layer is manufactured into the resonant cavity 5 by means of stamping and the like, so that the aim of eliminating the medium and low frequency noise is fulfilled.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 2, the thickness of the third resonance noise damping layer 3 is 5-200 mm.
In this embodiment, the fourth sound absorbing layer 4, the third resonant sound absorbing layer 3 and the second sound absorbing layer 2 are used to form an inlet of the medium-low frequency resonant cavity 5, a cavity of the resonant cavity 5 and a seal of the resonant cavity 5, so that medium-low frequency noise of the engine can be reduced in a targeted manner.
The resonant cavity 5 has the following calculation formula:
wherein f is the noise frequency;
lc is the distance from the fourth sound absorbing layer 4 to the opening of the third resonance sound absorbing layer 3;
sc is the sectional area of the resonant cavity 5;
v is the volume of the resonator 5.
The opening distance Lc can be adjusted by the thickness of the sound-absorbing cotton.
The thickness of each layer can be properly adjusted according to the frequency and the design requirement of different vehicle types.
The utility model discloses a four-layer structure design can effectively reduce high, well, low frequency noise, uses on the vehicle, can design the resonant cavity 5 of different structure shapes according to the difference of engine frequency, when reaching the high frequency noise in reducing, reduces well low frequency noise, improves personnel's in the car travelling comfort.
The utility model discloses a technical means to noise problem proposes, obviously, this kind of heat insulating mattress structure of making an uproar that falls still has the effect that conventional is thermal-insulated, does not make a detailed explanation here.
The utility model also provides a vehicle, install before the engine compartment of vehicle on enclosing the panel beating noise reduction heat insulating mattress structure.
The utility model provides a vehicle owing to installed foretell heat insulating mattress structure of making an uproar that falls on enclosing the panel beating before the engine compartment, can effectively reduce the engine low, well, high frequency noise, promotes NVH level in the car, and the driving experience in the comfortable quiet car of giving driver and crew to improve the quality of whole car.
The noise reduction and heat insulation pad body is simple in structure, easy to manufacture and convenient to install, the structure of the engine body is not required to be changed, the manufacturing cost of the whole vehicle and the weight of the whole vehicle can not be increased, the noise reduction of low, medium and high-frequency noise of the engine can be realized, and the competitive advantage of the whole vehicle can be improved.
The utility model provides a heat insulating mattress structure of making an uproar falls not only can use in different motorcycle types, also can use on other noise sources, reaches the noise of making an uproar falls to the noise of different frequency channels.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. Noise-reducing and heat-insulating pad structure, comprising: the noise reduction and heat insulation pad body is provided with a resonant cavity, and the open end of the resonant cavity faces a noise source;
the noise reduction and heat insulation pad body is provided with a plurality of groups of uniformly distributed resonant cavity groups, and each group of resonant cavity group comprises resonant cavities with different sizes and/or geometrical shapes.
2. The noise reducing and insulating mat structure of claim 1, wherein the geometry of the resonant cavity comprises at least two of a circle, an ellipse, and a polygon.
3. The noise-reducing and heat-insulating pad structure as claimed in any one of claims 1 to 2, wherein the noise-reducing and heat-insulating pad body comprises a first sound-absorbing layer, a second sound-insulating layer, a third resonant sound-absorbing layer and a fourth sound-absorbing layer which are stacked and connected, the third resonant sound-absorbing layer is provided with through holes with various geometric shapes and sizes, and the second sound-insulating layer is sealed at one end of the through holes so that the through holes form the resonant cavities.
4. The noise reducing and insulating mat structure of claim 3, wherein said first and fourth sound absorbing layers are sound absorbing cotton layers.
5. The noise reducing and insulating mat structure of claim 3, wherein said second layer of insulation is an EVA layer.
6. The noise reducing and insulating mat structure of claim 3, wherein the second acoustical layer has a thickness of 1-5 mm.
7. The noise and heat insulating pad structure of claim 3, wherein the third resonant sound-damping layer is a PU foam layer.
8. A noise and heat insulating pad structure as claimed in claim 3, wherein the third resonant sound-damping layer has a thickness of 5-200 mm.
9. The vehicle is characterized in that the noise-reducing and heat-insulating pad structure as claimed in any one of claims 1-8 is mounted on a front wall sheet metal of an engine compartment of the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022910233.9U CN213973867U (en) | 2020-12-07 | 2020-12-07 | Noise-reduction heat insulation pad structure and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022910233.9U CN213973867U (en) | 2020-12-07 | 2020-12-07 | Noise-reduction heat insulation pad structure and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213973867U true CN213973867U (en) | 2021-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022910233.9U Active CN213973867U (en) | 2020-12-07 | 2020-12-07 | Noise-reduction heat insulation pad structure and vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN213973867U (en) |
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- 2020-12-07 CN CN202022910233.9U patent/CN213973867U/en active Active
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