CN214164653U - Structure for reducing noise of tire cavity - Google Patents
Structure for reducing noise of tire cavity Download PDFInfo
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- CN214164653U CN214164653U CN202120033870.4U CN202120033870U CN214164653U CN 214164653 U CN214164653 U CN 214164653U CN 202120033870 U CN202120033870 U CN 202120033870U CN 214164653 U CN214164653 U CN 214164653U
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Abstract
The application discloses reduce structure of tire cavity noise includes: composite sound absorbing material and/or light spheres arranged in the tire; the composite sound-absorbing material comprises a sound-absorbing cotton layer and a sound-absorbing cloth layer; the sound-absorbing cotton layer is adhered to the inner surface of the tire; the sound-absorbing cloth layer is adhered to the sound-absorbing cotton layer. Through paste in the tire and inhale cotton layer of sound and inhale the sound cloth layer, including the disturbance of light spheroid to tire inner chamber air, can use the relatively thinner sound cotton of inhaling to reach the effect of the same cavity noise that reduces. The invention has simple operation, relatively less sound-absorbing material usage amount and easy processing, the sponge pellets can be reused, the comprehensive cost is lower, the invention is beneficial to industrial production and popularization, and the problems of larger volume, fussy manufacture, inconvenience for batch application and higher cost of the existing tire noise reduction technology are effectively solved.
Description
Technical Field
The application relates to the technical field of tire noise reduction, in particular to a structure for reducing noise of a tire cavity.
Background
Tire noise is one of important factors influencing the NVH performance of a finished automobile, and with the rapid development of new energy automobiles, the problem of tire noise becomes more prominent after the new energy automobiles cancel a traditional internal combustion engine. The noise of the tire is mainly generated and transmitted when the tire is contacted with the ground, and the problem of reducing the noise of the tire is comprehensively considered when the pattern, the structure and the formula of the tire are designed.
The existing noise reduction means is generally that a porous sound absorption material is arranged on the inner surface of a tire or other porous sound absorption devices in different forms such as pipe installation, multi-piece installation and the like are arranged on the inner surface of the tire; in order to achieve a good noise reduction effect, the sound absorption material has a large volume or adopts a multilayer structure, the surface is in a special shape, is segmented or is fixed by a buckle, and the cost is high; the latter has the disadvantages of complicated manufacturing process, high cost and inconvenience for batch application.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a structure for reducing tire cavity noise, for solve the problem that the existing tire noise reduction technology is large in size, cumbersome to manufacture, inconvenient to use in batches and high in cost.
In order to achieve the above technical object, the present application provides a structure for reducing noise of a tire cavity, including: composite sound absorbing material and/or light spheres arranged in the tire;
the composite sound-absorbing material comprises a sound-absorbing cotton layer and a sound-absorbing cloth layer;
the sound-absorbing cotton layer is adhered to the inner surface of the tire;
the sound-absorbing cloth layer is adhered to the sound-absorbing cotton layer.
Preferably, the sound-absorbing cotton layer has a width of 50 to 75% of the width of the tire.
Preferably, the sound-absorbing cloth layer has a width less than or equal to that of the sound-absorbing cotton layer.
Preferably, the sound absorption cotton layer is symmetrically adhered along the center line of the tire width direction.
Preferably, the sound absorption cloth layer is adhered to the end face, far away from the tire, of the sound absorption cotton layer.
Preferably, the sound-absorbing cloth layers are symmetrically adhered along the center line in the width direction of the tire.
Preferably, the sound-absorbing cotton layer is adhered to the inner surface of the tire by a double-sided adhesive.
Preferably, the sound-absorbing cotton layer is a porous polyurethane cotton layer.
Preferably, the sound absorption cloth layer is a non-woven cloth layer.
Preferably, the lightweight spheres are in particular sponge spheres.
According to the above technical solution, the present application provides a structure for reducing noise of a tire cavity, including: the composite sound absorbing material and/or the light ball body are/is arranged in the tire; the composite sound-absorbing material comprises a sound-absorbing cotton layer and a sound-absorbing cloth layer; the sound-absorbing cotton layer is adhered to the inner surface of the tire; the sound-absorbing cloth layer is adhered to the sound-absorbing cotton layer.
This application mainly is through setting up the structure that reduces the cavity noise at tire inner chamber, on the basis that does not sacrifice other performances of tire, effectively reduces the tire noise by a wide margin, improves the NVH performance of tire. The application pastes the composite sound absorption material and/or the light ball body in the tire, and comprises three schemes of only using the composite sound absorption material, only using the light ball body and using the composite sound absorption material and the light ball body together, wherein the composite sound absorption material uses less material compared with the sound absorption cotton layer; the light ball body disturbs the air in the tire cavity, so that the relatively thin sound-absorbing cotton can achieve the effect of reducing the noise of the cavity; the invention has simple operation, the light ball can be recycled, the comprehensive cost is lower, the invention is beneficial to industrial production and popularization, and the problems of larger volume, fussy manufacture, inconvenient batch application and higher cost of the existing tire noise reduction technology are effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic cross-sectional view of a tire cavity noise reduction structure provided in an embodiment of the present application;
in the figure: 1. a tire; 2. a sound absorbing cotton layer; 3. a sound absorbing cloth layer; 4. a light sphere.
Detailed Description
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection claimed herein.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
The embodiment of the application discloses a structure for reducing noise of a tire cavity.
Referring to fig. 1, an embodiment of the present application provides a structure for reducing noise of a tire cavity, including: composite sound absorbing material and/or light spheres 4 disposed within the tire; the composite sound-absorbing material comprises a sound-absorbing cotton layer 2 and a sound-absorbing cloth layer 3; the sound absorption cotton layer 2 is adhered to the inner surface of the tire 1; the sound absorption cloth layer 3 is adhered on the sound absorption cotton layer 2
Specifically, the sound-absorbing cloth layer 3 is adhered to the sound-absorbing cotton layer 2 to form a novel composite sound-absorbing material; the sound-absorbing cotton layer 2 is tightly adhered along the circumference of the inner surface of the tire 1 without interruption, and can be matched with the light ball 4 to disturb the air in the inner cavity of the tire 1, so that the effect of reducing the noise of the cavity by using relatively thin sound-absorbing cotton can be achieved.
In the embodiment, only the composite sound absorbing material, only the light ball 4 or both the composite sound absorbing material and the light ball 4 are used, and the three schemes can achieve better noise reduction effect than the prior art; the light ball 4 disturbs the air in the tire cavity, so that the relatively thin sound-absorbing cotton can achieve the effect of reducing the cavity noise; and use composite sound absorbing material to compare in only with inhaling the cotton layer of sound, can reduce the material use amount of inhaling the cotton layer of sound when inhaling the sound effect and promoting, effectively solve current tire and fall the technical volume of making an uproar great, the preparation is loaded down with trivial details, be not convenient for batch application and the higher problem of cost.
The above is the first embodiment provided in the present application, and the following is the second embodiment provided in the present application, please refer to fig. 1 specifically.
A structure for reducing tire cavity noise, comprising: a sound-absorbing cotton layer 2, a sound-absorbing cloth layer 3 and a light ball 4; the sound absorption cotton layer 2 is adhered to the inner surface of the tire 1; the sound absorption cloth layer 3 is adhered on the sound absorption cotton layer 2; the light ball 4 can be movably arranged in the tire 1.
Further, the width of the sound-absorbing cotton layer 2 accounts for 50% to 75% of the width of the tire 1.
Specifically, the thickness of the sound-absorbing cotton layer 2 may be 5 to 30 mm. The tire width as referred to herein refers to the nominal section width of the tire; the sound absorption cotton layer 2 accounts for 50 to 75 percent of the width of the tire 1, so that the noise reduction effect can be effectively realized.
Further, the width of the sound-absorbing cloth layer 3 is less than or equal to the width of the sound-absorbing cotton layer 2.
Specifically, the sound-absorbing cloth layer 3 may be single or plural; when the single piece is used, the sound absorption cloth layer 3 is adhered on the sound absorption cotton layer 2, and the width of the sound absorption cloth layer is less than or equal to that of the sound absorption cotton layer 2; when the number of the sound absorbing cloth layers is multiple, the sound absorbing cloth layers 3 are alternately adhered on the sound absorbing cotton layer 2, and the sum of the widths in the width direction can be equal to the width of the sound absorbing cotton layer 2 or smaller than the width of the sound absorbing cotton layer 2; when the sum of the widths of the plurality of sound-absorbing cloth layers 3 is smaller than the width of the sound-absorbing cotton layer 2, gaps exist between the plurality of sound-absorbing cloth layers 3.
The length of the sound-absorbing cloth layer 3 in the circumferential direction of the inner surface of the tire 1 is equal to the length of the sound-absorbing cotton layer 2.
Further, the sound absorbing cotton layer 2 is symmetrically adhered along the center line of the tire 1 in the width direction.
Further, the sound absorbing cloth layer 3 is attached to the end surface of the sound absorbing cotton layer 2 away from the tire 1. Specifically, the sound absorbing cotton layer 2 is a block layer having a plurality of end faces, and the sound absorbing cloth layer 3 may be attached to each end face, and in this embodiment, the sound absorbing cloth layer 3 is attached to an end face of the sound absorbing cotton layer 2 away from the tire 1.
Further, the sound-absorbing fabric layers 3 are attached symmetrically along the center line in the width direction of the tire 1.
Further, the sound absorbing cotton layer 2 is adhered to the inner surface of the tire 1 by a double-sided adhesive. In practical application, the inner surface of the tire 1 is pretreated, after the inner surface of the tire 1 is kept clean and dry, a double-sided adhesive is coated on the lower surface of the sound absorption cotton layer, then the sound absorption cotton layer is adhered to the inner surface of the tire 1, no gap is left in the whole circumference, the sound absorption cloth layer 3 is adhered to the upper surface of the sound absorption cotton layer 2, and finally the light ball 4 is placed in the inner cavity of the tire 1 before the tire is installed into a rim.
Further, the sound-absorbing cotton layer 2 is specifically a porous polyurethane cotton layer using a porous polyurethane material having a foam density of 15 to 50kg/m3。
Further, the sound-absorbing fabric layer 2 is specifically a nonwoven fabric layer.
Further, the light ball 4 is specifically a sponge ball, the diameter of the sponge ball is less than 100mm, the weight of the sponge ball is less than 10g, and the number of the sponge balls can be set as single or multiple according to actual needs; through light spheroid 4, can reduce the thickness of inhaling cotton layer 2 of sound and realize same reduction cavity noise effect, alleviate the weight of inhaling cotton layer 2 of sound, strengthen its heat dispersion and tear resistance.
It should be noted that:
the sound absorption cotton layer 2 adopts polyurethane foam material to meet the compression permanent deformation characteristic measured under 50% volume compression according to the national standard GB/T6669;
the sound absorption cotton layer 2 adopts polyurethane foam materials to meet the high-temperature aging performance measured according to the national standard GB/T9640 and the low-temperature flexibility performance measured according to GB/T33622;
the sound absorption cotton layer 2 is made of polyurethane foam material and meets the tensile strength and the elongation at break measured according to the national standard GB/T6344.
Specifically, according to the test methods of national standards GB9743 and GB9744, the tire adopting the structure provided by the application can pass high-speed and endurance tests, the sound-absorbing cotton layer 2, the sound-absorbing cloth layer 3 and the light ball 4 are not obviously deformed and damaged, and the sound-absorbing cotton layer 2, the sound-absorbing cloth layer 3 and the tire 1 are not fallen off or relatively displaced.
The tire with the structure tests the force transfer function by a method of freely hanging and knocking the wheel center, a high-speed uniformity testing machine is used for carrying out boss impact test at the speed of 80km/h, and the amplitude of a cavity frequency band within a specific frequency range of 160-260 Hz is greatly reduced.
The tire noise detected in the vehicle is mainly caused by the noise in the cavity and is interference caused by the air resonance of the cavity of the pneumatic tire, and the noise is mainly concentrated in a specific frequency range of 160-260 Hz. A microphone is arranged at a designated position on a test vehicle to record the noise inside the vehicle, the speed of 60km/h and the speed of 80km/h are respectively used, on a rough asphalt concrete track, the cavity noise of the tire with the structure is observed to be reduced by 2-2.5 dB (A) relative to a comparison tire, and the finally realized noise reduction effect is better.
Although the present invention has been described in detail with reference to examples, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.
Claims (10)
1. A structure for reducing noise in a tire cavity, comprising: composite sound absorbing material and/or light spheres arranged in the tire;
the composite sound-absorbing material comprises a sound-absorbing cotton layer and a sound-absorbing cloth layer;
the sound-absorbing cotton layer is adhered to the inner surface of the tire;
the sound-absorbing cloth layer is adhered to the sound-absorbing cotton layer.
2. The structure for reducing noise of a tire cavity according to claim 1, wherein the width of the sound-absorbing cotton layer is 50 to 75% of the width of the tire.
3. A tire cavity noise reducing structure as defined in claim 1 or claim 2, wherein said sound-absorbing cloth layer has a width less than or equal to the width of said sound-absorbing cotton layer.
4. The structure for reducing noise of a tire cavity according to claim 1, wherein the sound-absorbing cotton layer is symmetrically adhered along a center line in the width direction of the tire.
5. The structure of claim 4, wherein the sound-absorbing cloth layer is adhered to the end surface of the sound-absorbing cotton layer far from the tire.
6. The structure for reducing noise of a tire cavity according to claim 5, wherein the sound-absorbing cloth layer is attached symmetrically along a center line in the tire width direction.
7. The structure for reducing noise of a tire cavity according to claim 1, wherein the sound-absorbing cotton layer is adhered to the inner surface of the tire by a double-sided adhesive.
8. A tire cavity noise reduction structure as in claim 1, wherein said sound absorbing cotton layer is specifically a porous polyurethane cotton layer.
9. The structure for reducing noise of a tire cavity as set forth in claim 1, wherein said sound-absorbing fabric layer is a nonwoven fabric layer.
10. A structure for reducing noise of a tire cavity as claimed in claim 1, wherein the lightweight sphere is a sponge sphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120033870.4U CN214164653U (en) | 2021-01-07 | 2021-01-07 | Structure for reducing noise of tire cavity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120033870.4U CN214164653U (en) | 2021-01-07 | 2021-01-07 | Structure for reducing noise of tire cavity |
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| CN214164653U true CN214164653U (en) | 2021-09-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659819A (en) * | 2021-01-07 | 2021-04-16 | 万力轮胎股份有限公司 | Structure for reducing noise of tire cavity |
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- 2021-01-07 CN CN202120033870.4U patent/CN214164653U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659819A (en) * | 2021-01-07 | 2021-04-16 | 万力轮胎股份有限公司 | Structure for reducing noise of tire cavity |
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