TWI784751B - Porous noise reduction apparatus as well as tire having the same - Google Patents

Abstract

A porous noise reduction apparatus and a tire having the same are disclosed. The noise reduction apparatus includes a noise reduction device provided on an inner side of a tire. The noise reduction device is provided with a plurality of projecting portions and a plurality of concave portions. Each adjacent projecting and concave portions are connected through an inclined portion. The noise reduction device and the inner side of the tire jointly form a sub-cavity in the tire cavity. The projecting portions, concave portions and inclined portions are selectively provided with a plurality of micropores. Due to the choice of micropore diameter, micropore distribution, and volume ratio of the sub-cavity to the tire cavity, the noise reduction device of the present invention can achieve a better noise reduction effect with a smaller thickness. Therefore, the present invention not only reduces the rolling noise caused by cavity resonance which may occur while a tire is rolling, but also reduces the weight of tire.

Description

Microporous noise reducer and tire with the microporous noise reducer

The invention relates to a tire noise reducer and a tire equipped with the noise reducer, especially a noise reducer provided with micro-holes and a tire equipped with the noise reducer.

When the vehicle is running on the road, the tires collide with the road and deform, which will generate cavity resonance sound inside the tire. At the same time, the vibration of the axle will cause the vibration of the vehicle floor, which will cause noise in the car.

Therefore, Chinese Patent No. CN102119087A provides a tire and wheel noise reduction device and system. The air cavity is mainly defined by a porous barrier, and the barrier also includes a material that can provide sound resistance. Reduce noise.

And Chinese Patent No. CN105313607B provides a pneumatic tire, mainly by forming through holes on the plate-like components to reduce the cavity resonance sound while suppressing the increase in weight and cost.

However, the aforementioned patents have the following disadvantages: in the aforementioned CN102119087A patent, the barrier is actually arranged on the rim, which will hinder the installation of the tire, and cannot reduce the noise when the resonance sound of the cavity diffuses. Vibration may even lead to worsening noise.

In the aforementioned CN105313607B patent case, the thickness of the plate-shaped component is relatively large, and the through-holes do not reach the microporous level. The thickness and weight of the plate will affect the balance of the tire, resulting in unsafe driving.

The inventor of the present invention also proposed a tire with a noise reduction element and the noise reduction element thereof, which was compiled as the No. I714185 patent by the Intellectual Property Bureau of the Republic of China, mainly through the protruding parts and the staggered array distribution on the noise reduction element. The concave part achieves a noise reduction effect. However, the inventor has continued to study intensively and found that the noise reduction effect of the aforementioned I714185 patent still needs to be improved.

Therefore, in order to reduce the cavity resonance sound generated when the tire rolls on the ground, the present inventor proposes a microporous noise reducer installed on a tire, the tire includes a tire inner surface, and the tire inner surface defines a tire The cavity, the microporous noise reducer includes: a noise reduction element, arranged on the inner surface of the tire, the noise reduction element has a plurality of protrusions and a plurality of depressions, the adjacent protrusions and the depressions There is an inclined part connected between the parts, the noise reducing element and the inner surface of the tire form a cavity in the tire cavity, one of the protruding part, the concave part and the inclined part or a combination A plurality of micropores, the diameter of the micropores is between 0.1 and 1 mm, the opening ratio of the micropores on the noise reduction element is greater than 0% and not greater than 20%, and the thickness of the noise reduction element is between 0.1 between 1% and 3 mm, and the volume of the cavity accounts for between 1% and 50% of the volume of the tire cavity.

Further, the noise reduction element includes a plurality of ribs respectively located in the concave portion, the protruding directions of the ribs and the protruding portion both extend away from the inner surface of the tire, and the ribs extend along one axial direction of the tire Extending, the adjacent inclined parts are connected through the ribs, and the microholes are formed on the ribs.

Wherein, the protruding portion, the recessed portion, the inclined portion and the rib are integrally formed.

Wherein, the protrusions and the depressions are distributed in a staggered array.

Further, the noise reduction element includes a first noise reduction surface corresponding to the inner surface of the tire, a plate combined with the first noise reduction surface or the protrusion, and there are a plurality of holes on the plate, and the holes The hole diameter is between 0.1mm and 10mm.

Further, a connecting piece is arranged between the noise reducing element and the inner surface of the tire.

Wherein, the thickness of the noise reduction element is less than 1 mm.

Wherein, the opening ratio of the micropores on the noise reduction element is less than 1%.

Wherein, the diameter of the micropores is less than 0.4 mm.

Wherein, the protruding part, the concave part and the inclined part jointly form one of the following shapes: concave polyhedron, cone, cylinder and truncated cone.

The inventor further proposes a tire with a micro-hole noise reducer, which includes the aforementioned micro-hole noise reducer, and further includes: an inner surface of the tire, the inner surface of the tire defines a tire cavity.

According to the above-mentioned technical characteristics, the following effects can be preferably achieved:

1. By setting micropores of specific size and opening ratio on the noise reduction element, the noise reduction element can achieve a good noise reduction effect with only a very thin thickness, and effectively use the noise reduction element to weaken the original tire rolling The cavity resonance sound generated when on the ground has the functions of low weight and noise reduction.

2. The noise reduction element is set on the inner surface of the tire, which will not affect the installation of the tire.

3. The holes on the board body and the micro-holes on the ribs can further improve the noise reduction effect.

4. A connecting piece is further provided between the noise reduction element and the inner surface of the tire, which can further reduce the impact force of the tire.

5. With the planar protruding part, it is convenient to combine with the board body.

6. The protruding part, the concave part, the inclined part and the rib are integrally formed, so that the noise reducing element can be flexed according to the shape of the tire.

100: Tires with microporous noise reducers

1,1a: microporous noise reducer

11, 11a, 11b: noise reduction components

111, 111a: the first noise reduction surface

112: Second noise reduction surface

113, 113a, 113b: protrusions

114, 114b: depression

115, 115b: inclined part

116: Rib

117: Concave space

118: Cavity

119, 119b: microporous

12: link

13a: board body

131a: hole

2: tires

21: The inner surface of the tire

22: tire cavity

[The first figure] is the three-dimensional appearance view of the first embodiment of the present invention.

[The second figure] is a sectional view of the first embodiment of the present invention.

[The third figure] is an enlarged view of the noise reduction element part of the first embodiment of the present invention.

[Figure 4] is a plan view of the noise reducing element part of the first embodiment of the present invention.

[FIG. 5] is a side view of the first embodiment of the noise reduction element of the present invention, showing a view along the tire tangent.

[Figure 6] is the second side view of the noise reduction element part of the first embodiment of the present invention, showing the view along the tire axis.

[Fig. 7] is a side view of the part of the noise reduction element of the second embodiment of the present invention, showing the view along the tire axial direction.

[Eighth Figure] is an enlarged view of the noise reduction element part of the third embodiment of the present invention.

Based on the above technical features, the main functions of the microporous noise reducer and the tire with the microporous noise reducer of the present invention will be clearly presented in the following embodiments.

Please refer to the first and second figures, which disclose the first embodiment of the microporous noise reducer 1 of the present invention, which is installed on a tire 2 to become a tire 100 with a microporous noise reducer of the present invention. 2 comprises an inner tire surface 21 which delimits a tire cavity 22.

The microporous noise reducer 1 includes: a noise reduction element 11 and a connecting piece 12 .

Please refer to the second figure to the fourth figure, the noise reducing element 11 is disposed on the tire inner surface 21 without affecting the installation of the tire 2 . The noise reduction element 11 includes a first noise reduction surface 111 and a second noise reduction surface 112 opposite to each other, and the first noise reduction surface 111 corresponds to the tire inner surface 21 . The second noise reduction surface 112 has staggered A plurality of protruding parts 113 and a plurality of recessed parts 114 distributed in an array, an inclined part 115 is respectively connected between the adjacent protruding parts 113 and the recessed parts 114, and a plurality of ribs 116 are respectively located in the recessed parts 114 , the adjacent inclined portions 115 are connected via the ribs 116 . Both the protruding directions of the ribs 116 and the protrusions 113 extend away from the inner surface 21 of the tire, and the ribs 116 extend along an axial direction of the tire 2 and are arranged along a circumferential direction of the tire 2 And surround this tire 2. Preferably, the protruding portion 113, the concave portion 114, the inclined portion 115 and the rib portion 116 are integrally formed, so that the noise reducing element 11 can be flexed according to the shape of the tire 2, and the The protruding portion 113 , the recessed portion 114 and the inclined portion 115 jointly form one of the following shapes: a concave polyhedron, a cone, a cylinder, and a truncated cone.

The connecting piece 12 is arranged between the noise reduction element 11 and the tire inner surface 21, which can slow down the impact force of the tire 2, and can also assist the bonding, sticking, and bonding of the microporous noise reducer 1 and the tire 2 , fixation, protection, reinforcement, and more. The connecting member 12 can be porous material or adhesive, etc., which is not limited in the present invention.

Please refer to the fourth figure to the sixth figure, the protruding portion 113 and the adjacent inclined portion 115 form two concave spaces 117, and the concave portion 114 extends into the adjacent concave space 117 .

The noise reduction element 11 and the tire inner surface 21 form a cavity 118 in the tire cavity 22 [the tire inner surface 21 and the tire cavity 22 please match the second figure], the protruding part 113, the There are a plurality of micropores 119 on one of the concave portion 114, the inclined portion 115 and the rib portion 116 or a combination thereof, and the volume of the cavity 118 accounts for between 1% and 50% of the volume of the tire cavity 22 . The thickness of the noise reduction element 11 is between 0.1 and 3 millimeters, preferably less than 1 millimeter; the opening ratio of the microholes 119 on the noise reduction element 11 is greater than 0% and not greater than 20%, preferably less than 1%; and the diameter of the micropores 119 is between 0.1 mm and 1 mm, preferably less than 0.4 mm.

Please refer to the seventh figure, which discloses the second embodiment of the microporous noise reducer 1a of the present invention. The biggest difference between this embodiment and the first embodiment is that this embodiment also has a plate body 13a combined with the noise reducer. Component 11a, the link is not shown in the drawings.

In more detail, the plate body 13a is combined with the first noise reduction surface 111a or the protruding portion 113a, and there are a plurality of holes 131a on the plate body 13a, and the diameter of the holes 131a ranges from 0.1 mm to 10 mm. mm, the plate body 13a can further enhance the noise reduction effect.

Please refer to the eighth figure, which discloses the third embodiment of the present invention. In the eighth figure, only the noise reduction element 11b is drawn. The biggest difference between this embodiment and the first embodiment is that in the first embodiment In [the first embodiment, please match the third figure], the protruding part 113, the concave part 114 and the inclined part 115 together form a concave polyhedron; and in this embodiment, the protruding part 113b, the The concave portion 114b and the inclined portion 115b together form a truncated cone.

In this embodiment, the protruding portion 113b, the recessed portion 114b and the inclined portion 115b are all provided with the microhole 119b, which can also effectively reduce noise.

Referring again to the second and sixth figures, the tire 100 with the microporous noise reducer of the first embodiment was tested on a real vehicle, and the specification of the selected tire 2 was 225/50R17.

The tire 2 without the microporous noise reducer 1 was used as a first control group, and the tire 2 with the microporous noise reducer 1 installed but without the micropore 119 was used as the first control group. It is a second control group, and the tire 100 with the micro-hole noise reducer is the experimental group. Wherein, the microporous noise reducer 1 has a thickness of 0.2 mm and a net weight of 80 grams. The micropores 119 have a porosity of 3.9% and a diameter of 0.4 mm.

The test results of cavity resonance sound are shown in the table below, and the values in brackets are the difference from the first control group:

According to the above test results, it can be found that compared with the first control group, the interior sound of the second control group is reduced by 1 to 4dB(A), while that of the experimental group is reduced by 4 to 6dB(A). Tire 100 outperformed the second control group in each test condition.

In addition, the experiment of the perforated noise reduction panel shows that the acoustic resistance is inversely proportional to the aperture, the smaller the aperture, the better the acoustic resistance, and thus improve the noise reduction effect; the larger the opening ratio, the lower the sound quality of the perforated noise reduction panel, especially When the opening ratio is greater than 20%, its acoustic effect is not significant. Therefore, the tire 100 with the micro-hole noise reducer can obtain a large sound resistance by opening the micro-hole 119 so that the sound passes through the micro-hole 119 and the cavity 118 . The noise reduction element 11 only needs a very thin thickness to achieve a good noise reduction effect, and the noise reduction element 11 is effectively used to weaken the original cavity resonance sound generated when the tire 2 rolls on the ground, and has both low weight and Noise reduction function.

Based on the description of the above-mentioned embodiments, it is possible to fully understand the operation of the present invention, use and the effect that the present invention produces, but the above-mentioned embodiments are only preferred embodiments of the present invention, and should not be used to limit the implementation of the present invention. The scope, that is, the simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the description of the invention, all fall within the scope of the present invention.

11: Noise reduction components

111: The first noise reduction surface

112: Second noise reduction surface

113: protruding part

114: depression

115: Inclined part

116: Rib

119: microporous

Claims (11)

A microporous noise reducer installed on a tire, the tire includes a tire inner surface, the tire inner surface defines a tire cavity, the microporous noise reducer includes: a noise reduction element, arranged on the tire inner surface The noise reduction element has a plurality of protrusions and a plurality of depressions, and an inclined portion is respectively connected between the adjacent protrusions and the depressions. The noise reduction element and the inner surface of the tire are in the tire cavity A cavity is formed in the cavity, and there are a plurality of micropores on one or a combination of the protruding part, the concave part and the inclined part, and the diameter of the micropores is between 0.1 and 1 mm. The noise reduction The opening ratio of the micropores on the element is greater than 0% and not greater than 20%, the thickness of the noise reduction element is between 0.1 and 3 mm, and the volume of the cavity accounts for 1% of the volume of the tire cavity to 50%. The microporous noise reducer according to claim 1, further, the noise reduction element includes a plurality of ribs respectively located in the concave part, and the protruding directions of the ribs and the protruding parts are far away from the inner surface of the tire Extending, the ribs extend along one axial direction of the tire, the adjacent inclined parts are connected through the ribs, and the micropores are formed on the ribs. The microporous noise reducer according to claim 2, wherein the protrusion, the depression, the slope and the rib are integrally formed. The microporous noise reducer according to claim 1, wherein the protrusions and the depressions are distributed in a staggered array. The microporous noise reducer as described in claim 1, further, the noise reduction element includes a first noise reduction surface corresponding to the inner surface of the tire, and a plate is combined with the first noise reduction surface or the protrusion, Moreover, there are a plurality of holes on the plate body, and the diameter of the holes is between 0.1 mm and 10 mm. The microporous noise reducer as claimed in claim 1, further, a connecting piece is arranged between the noise reduction element and the inner surface of the tire. The microporous noise reducer as claimed in claim 1, wherein the thickness of the noise reduction element is less than 1 mm. The microporous noise reducer according to claim 1, wherein the porosity of the micropores on the noise reducing element is less than 1%. The microporous noise reducer according to claim 1, wherein the diameter of the micropores is less than 0.4 mm. The microporous noise reducer according to claim 1, wherein the protrusion, the depression and the slope jointly form one of the following shapes: a concave polyhedron, a cone, a cylinder and a truncated cone. A tire with a microporous noise reducer, comprising the microporous noise reducer as described in any one of Claims 1 to 10, further comprising: a tire inner surface defining a tire cavity.

Images