Wheel sound absorption and noise reduction device and wheel having the same

Abstract

The present invention discloses a wheel sound absorption and noise reduction device and a wheel having the same. The wheel sound absorption and noise reduction device includes a porous sound absorption matrix and a plurality of sound absorption structures. The plurality of sound absorption structures are arranged on the porous sound absorption matrix, and each sound absorption structure has a sound absorption inlet extending to the surface of the porous sound absorption matrix. The sound absorption structure includes a converging region and a sound absorption region. The converging region is arranged inside the porous sound absorption matrix and has the same cross-sectional size. One end of the sound absorption region communicates with the converging region and the other end forms the sound absorption inlet. When the sound absorption region extends from the converging region towards the surface of the porous sound absorption matrix, the cross-sectional size gradually increases. According to the wheel sound absorption and noise reduction device of the embodiment of the present invention, the sound absorption inlet is arranged on the porous sound absorption matrix, and the sound absorption inlet communicates the sound absorption region and the converging region. The cavity resonance noise generated during the driving of the vehicle can enter the converging region through the sound absorption inlet and be absorbed by the porous structure of the porous sound absorption matrix, improving the noise reduction ability of the wheel sound absorption and noise reduction device.

Description

Technical Field

[0001] The present invention belongs to the technical field of wheel production and manufacturing, and particularly relates to a wheel sound absorption and noise reduction device and a wheel having the same. Background Art

[0002] The road noise level of a vehicle is one of the important indicators to measure the vehicle quality. During the driving process of the vehicle, the road surface excitation causes the air in the wheel to vibrate, and then resonance noise is generated in the tire cavity. This tire cavity resonance noise seriously affects the riding comfort of the driver and passengers in the cabin.

[0003] In the prior art, in order to reduce the tire cavity resonance noise, sound absorption structures such as micro-perforated plates and Helmholtz resonators are usually selected to be arranged in the circumferential direction of the tire. However, the above-mentioned sound absorption structures can only absorb the sound wave energy of a relatively narrow frequency range, and have poor absorption effects on the medium and low frequency sound wave energy. Moreover, the above-mentioned sound absorption structures also have disadvantages such as high cost and large volume, and cannot achieve the lightweight of the tire, which affects the heat dissipation of the tire and shortens the service life of the tire. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a wheel sound absorption and noise reduction device, which can effectively reduce the tire cavity resonance noise, reduce the material used for the sound absorption structure, realize the lightweight of the wheel sound absorption and noise reduction device, and solve the technical problems that the wheel sound absorption and noise reduction device in the prior art cannot achieve the noise reduction purpose, has a large volume, affects the heat dissipation of the tire and shortens the service life of the tire.

[0005] The present invention also aims to provide a wheel having the above-mentioned wheel sound absorption and noise reduction device.

[0006] According to an embodiment of the present invention, a wheel sound absorption and noise reduction device includes: a porous sound absorption matrix; a plurality of sound absorption structures, the plurality of sound absorption structures are arranged on the porous sound absorption matrix, and each sound absorption structure has a sound absorption inlet extending to the surface of the porous sound absorption matrix; the sound absorption structure includes: a converging area, the converging area is arranged in the porous sound absorption matrix, and the cross-sectional size of the converging area is the same; a sound absorption area, one end of the sound absorption area is communicated with the converging area, and the other end of the sound absorption area forms the sound absorption inlet; the cross-sectional size of the sound absorption area gradually increases when extending from the converging area to the surface of the porous sound absorption matrix.

[0007] The wheel sound absorption and noise reduction device according to an embodiment of the present invention is provided with a plurality of sound absorption structures on a porous sound absorption matrix, and each sound absorption structure has a sound absorption inlet formed on the surface of the porous sound absorption matrix. The cavity resonance noise generated during the driving of the vehicle can enter the sound absorption area through the sound absorption inlet. Since the cross-sectional size gradually increases when the sound absorption area extends from the converging area towards the surface of the porous sound absorption matrix, based on the acoustic black hole energy convergence mechanism, the sound absorption area causes the sound wave energy to gradually gather towards the converging area along the extension direction of the sound absorption area. When the sound wave energy is gathered to the converging area, the sound wave energy can be further absorbed by the porous structure of the porous sound absorption matrix, thereby achieving the purpose of sound absorption and noise reduction, improving the noise reduction ability of the wheel sound absorption and noise reduction device. Moreover, by providing a plurality of sound absorption structures on the porous sound absorption matrix, the plurality of sound absorption structures can also reduce the material used for the porous sound absorption matrix, reduce the production cost, and reduce the weight of the porous sound absorption matrix, realizing the lightweight of the wheel sound absorption and noise reduction device. The wheel sound absorption and noise reduction device of the present application has strong noise reduction ability, low cost and light weight.

[0008] For the wheel sound absorption and noise reduction device according to an embodiment of the present invention, when the sound absorption structure extends from the converging area to the sound absorption area, the half-width value r of the cross-section and the sound absorption structure at different depths x satisfy the following relational expression: wherein, r0 is half of the truncated width value of the cross-section of the converging area; l0 is the depth of the cross-section of the converging area; R is half of the width value of the sound absorption inlet; L is the total depth of the sound absorption structure; where m is greater than 2, the value range of r0 is from 0.1 mm to 1 mm, and the value range of R is from 2 mm to 5 mm.

[0009] For the wheel sound absorption and noise reduction device according to an embodiment of the present invention, the sound absorption structure is a sound absorption hole, and one end of the sound absorption hole forms the sound absorption inlet; the converging area is formed as a columnar first sound absorption hole, and the sound absorption area is formed as a second sound absorption hole in the shape of an inverted curved surface conical column, and the cross-sectional radius of the second sound absorption hole has a power exponential function relationship with the depth of the second sound absorption hole.

[0010] Optionally, fixed surfaces and sound absorption surfaces are respectively formed on opposite sides of the porous sound absorption matrix. The fixed surface is adapted to be attached to the inner surface of the tire, and a plurality of the sound absorption holes extend from the fixed surface towards the side of the sound absorption surface, and the sound absorption inlet is formed on the sound absorption surface.

[0011] Optionally, one side of the porous sound absorption matrix is adapted to be connected to the tire, and a plurality of the sound absorption holes are arranged in multiple rows on the porous sound absorption matrix; the sound absorption inlets of the multiple rows of the sound absorption holes are respectively located on different surfaces where the porous sound absorption body is spaced apart from the tire.

[0012] Optionally, dense sound absorption holes are formed in the porous sound absorption matrix. The diameter of the sound absorption holes is 2 μm to 200 μm, and the distance between two adjacent sound absorption holes is 0.5 mm to 5 mm.

[0013] For the wheel sound absorption and noise reduction device according to an embodiment of the present invention, the sound absorption structure is a sound absorption groove. The sound absorption inlets of each sound absorption groove are arranged on the same plane. The sound absorption groove includes a first sound absorption groove formed by a converging area and a second sound absorption groove formed by a sound absorption area. The cross-sectional widths of the first sound absorption grooves are equal, and the cross-sectional width of the second sound absorption groove has a power exponential function relationship with the depth of the second sound absorption groove.

[0014] A wheel according to an embodiment of the present invention includes: a wheel rim; a wheel sound absorption and noise reduction device, which is the aforementioned wheel sound absorption and noise reduction device; a tire, which is installed on the outer side of the wheel rim, and the porous sound absorption matrix is connected to one side surface of the tire facing the wheel rim.

[0015] For the wheel according to an embodiment of the present invention, by connecting the aforementioned wheel sound absorption and noise reduction device to the tire, the wheel sound absorption and noise reduction device can effectively absorb the cavity resonance noise generated inside the wheel during the driving of the vehicle, improve the noise reduction ability of the wheel, meet the requirements of a low-noise wheel, and the aforementioned wheel sound absorption and noise reduction device has a low production cost and a light weight, and can achieve the lightweight of the wheel.

[0016] For the wheel according to an embodiment of the present invention, the maximum width of the porous sound absorption matrix is 60% to 90% of the width of the tire; the overall height of the porous sound absorption matrix is 20 mm to 80 mm.

[0017] For the wheel according to an embodiment of the present invention, the wheel sound absorption and noise reduction device is continuously arranged along the circumferential direction of the tire and is connected end to end; or, the length of the wheel sound absorption and noise reduction device is less than the circumference of the tire, and multiple segments of the wheel sound absorption and noise reduction device are arranged at intervals in the circumferential direction of the tire.

[0018] The additional aspects and advantages of the present invention will become obvious in the following description or be understood through the practice of the present invention. Description of the Drawings

[0019] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0020] Figure 1 It is a cross-sectional view of a wheel according to the first embodiment of the present invention.

[0021] Figure 2 is Figure 1 a partial enlarged view of area I in

[0022] Figure 3 It is Figure 2 a partial enlarged view of Region II in

[0023] Figure 4 a partial structural schematic diagram of the wheel sound absorption and noise reduction device according to the first embodiment of the present invention installed on a tire.

[0024] Figure 5 a partial structural schematic diagram of the wheel sound absorption and noise reduction device according to the second embodiment of the present invention installed on a tire.

[0025] Figure 6 a left view of the wheel sound absorption and noise reduction device according to the second embodiment of the present invention.

[0026] Figure 7 It is Figure 6 a sectional view along line A - A.

[0027] Figure 8 a sectional view of the wheel sound absorption and noise reduction device according to the third embodiment of the present invention installed on a tire.

[0028] Figure 9 It is Figure 8 a partial enlarged view of Region III in

[0029] Figure 10 It is Figure 9 a partial enlarged view of Region IV in

[0030] Figure 11 a partial structural schematic diagram of the wheel sound absorption and noise reduction device according to the third embodiment of the present invention installed on a tire.

[0031] Reference numerals:

[0032] 100, wheel sound absorption and noise reduction device;

[0033] 1, porous sound absorption matrix;

[0034] 11, fixing surface;

[0035] 12, sound absorption surface;

[0036] 13, sound absorption hole;

[0037] 2, sound absorption structure;

[0038] 21, sound absorption cavity; 211, first sound absorption cavity; 212, second sound absorption cavity;

[0039] 22, sound absorption groove; 221, first sound absorption groove; 222, second sound absorption groove;

[0040] 23, sound absorption inlet;

[0041] 1000. Wheel;

[0042] 200. Rim;

[0043] 300. Tire. Detailed implementation manners

[0044] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "inner", "outer", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0046] The wheel sound absorption and noise reduction device 100 of the embodiment of the present invention will be described below with reference to the accompanying drawings of the specification.

[0047] A wheel sound absorption and noise reduction device 100 according to an embodiment of the present invention, as Figure 2 shown, includes: a porous sound absorption matrix 1 and a plurality of sound absorption structures 2.

[0048] Among them, as Figure 2 and Figure 3 shown, a plurality of sound absorption structures 2 are provided on the porous sound absorption matrix 1, and each sound absorption structure 2 has a sound absorption inlet 23 extending to the surface of the porous sound absorption matrix 1. That is to say, the sound absorption inlet 23 is formed on the surface of the porous sound absorption matrix 1, and each sound absorption inlet 23 communicates with a sound absorption structure 2.

[0049] As Figure 3 shown, the sound absorption structure 2 includes a converging region and a sound absorption region.

[0050] The converging region is provided inside the porous sound absorption matrix 1, and the cross-sectional dimensions of the converging region are the same. Here, it means that when extending from one end to the other end of the converging region, the cross-sectional dimensions of the converging region remain unchanged.

[0051] One end of the sound absorption region is connected to the converging region, and the other end of the sound absorption region forms the sound absorption inlet 23. That is to say, the sound absorption region is provided on one side of the converging region and is close to the surface of the porous sound absorption matrix 1.

[0052] When the sound absorption area extends from the converging area towards the surface of the porous sound absorption substrate 1, the cross-sectional size gradually increases. It can also be understood that when the sound absorption area extends from the converging area towards the sound absorption inlet 23, the cross-sectional size gradually increases, that is, when the sound absorption area extends from the sound absorption inlet 23 towards the converging area, the cross-sectional size gradually decreases.

[0053] As can be seen from the above structure, for the wheel sound absorption and noise reduction device 100 of the embodiment of the present invention, by arranging a plurality of sound absorption structures 2 on the porous sound absorption substrate 1, on the one hand, the plurality of sound absorption structures 2 can reduce the material used for the porous sound absorption substrate 1 and reduce the production cost of the wheel sound absorption and noise reduction device 100; on the other hand, the plurality of sound absorption structures 2 can reduce the weight of the porous sound absorption substrate 1 and achieve the lightweight of the wheel sound absorption and noise reduction device 100; on the third hand, since each sound absorption structure 2 has a sound absorption inlet 23, during the driving of the vehicle, the cavity resonance noise generated in the cavity formed between the tire 300 and the rim 200 can enter the sound absorption structure 2 through the sound absorption inlet 23. The sound absorption structure 2 can aggregate and transfer the acoustic wave energy to the porous structure in the porous sound absorption substrate 1, and the porous structure of the porous sound absorption substrate 1 absorbs the acoustic wave energy to achieve the purpose of sound absorption and noise reduction, thereby improving the noise reduction ability of the wheel sound absorption and noise reduction device 100.

[0054] During the driving of the vehicle, especially when the vehicle is driving on an uneven road surface, due to road excitation, cavity resonance noise will be generated in the cavity formed between the tire 300 and the rim 200. By arranging a plurality of sound absorption inlets 23 on the surface of the porous sound absorption substrate 1, the sound absorption inlets 23 can play a guiding role in the transfer of acoustic wave energy, ensuring that the acoustic wave energy can be aggregated into the sound absorption area through the sound absorption inlets 23.

[0055] By setting the cross-sectional size of the sound absorption area to gradually increase from the converging area towards the sound absorption inlet 23, that is, the cross-sectional size of the sound absorption inlet 23 is much larger than that of the converging area. The larger cross-sectional size of the sound absorption inlet 23 makes it easy for the acoustic wave energy to enter the interior of the sound absorption structure 2, so as to ensure that the wheel sound absorption and noise reduction device 100 can absorb the acoustic wave energy in different frequency bands, broaden the frequency band of the absorbable acoustic wave energy, and especially has a good absorption effect on medium and low frequency noise.

[0056] It should be noted that the cross-section mentioned here refers to the section parallel to the sound absorption inlet 23.

[0057] When the acoustic wave energy enters the sound absorption area through the sound absorption inlet 23, based on the acoustic black hole energy convergence mechanism, the acoustic wave energy entering the sound absorption area will be transmitted in the direction of the smaller cross-sectional size, that is, the acoustic wave energy will be transmitted through the sound absorption area towards the convergence area. Since the cross-sectional sizes of the convergence areas are the same, the convergence area can concentrate the acoustic wave energy at one end of the sound absorption structure 2 away from the sound absorption inlet 23.

[0058] The convergence area is arranged in the porous sound absorption matrix 1. Since the porous sound absorption matrix 1 itself has a plurality of sound absorption holes 13, the acoustic wave energy can be absorbed by the sound absorption holes 13 of the porous sound absorption matrix 1. The acoustic wave energy can penetrate deep into the porous sound absorption matrix 1 along the sound absorption holes 13 in the porous sound absorption matrix 1. During the process of penetrating deep into the porous sound absorption matrix 1, the sound absorption holes 13 inside the porous sound absorption matrix 1 can play a role in reflecting the acoustic wave energy, increasing the transmission path of the acoustic wave energy and weakening the vibration amplitude of the acoustic wave energy, thereby achieving the purpose of sound absorption and noise reduction and improving the noise reduction ability of the wheel sound absorption and noise reduction device 100.

[0059] It should be noted that since both the sound absorption area and the convergence area are arranged in the porous sound absorption matrix 1, during the process of the acoustic wave energy being transmitted from the sound absorption area to the convergence area, in the sound absorption area, part of the acoustic wave energy can also be absorbed by the sound absorption holes 13 of the porous sound absorption matrix 1, but most of the acoustic wave energy will be concentrated in the convergence area and penetrate deep into the porous sound absorption matrix 1 through the convergence area.

[0060] It can be understood that compared with the prior art, the wheel sound absorption and noise reduction device 100 of the present application can absorb the acoustic wave energy in different frequency bands, and on the premise of achieving the purpose of sound absorption and noise reduction, it can also reduce the material consumption of the porous sound absorption matrix 1, reduce the production cost and realize the lightweight of the wheel sound absorption and noise reduction device 100.

[0061] Optionally, the porous sound absorption matrix 1 can be made of materials such as polyurethane sponge and polypropylene foam. Since the materials of polyurethane sponge and polypropylene foam are relatively light, when the porous sound absorption matrix 1 is made of polyurethane sponge or polypropylene foam, on the premise of ensuring that the porous sound absorption matrix 1 has good sound absorption ability and realizing the lightweight of the porous sound absorption matrix 1, the porous sound absorption matrix 1 also has the advantages of strong impact resistance, high wear resistance and low processing cost, effectively saving the use cost of the porous sound absorption matrix 1.

[0062] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0063] In some embodiments of the present invention, when the sound absorption structure 2 extends from the convergence area to the sound absorption area, the half-width value r of the cross-section and the sound absorption structure 2 at different depths x satisfy the following relational expression:

[0064]

[0065] Wherein, r0 is half of the truncation width value of the cross-section of the converging region; l0 is the depth of the cross-section of the converging region; R is half of the width value of the sound absorption inlet 23; L is the total depth of the sound absorption structure 2, where m is greater than 2.

[0066] It should be noted that m can be selected as an integer or a decimal, and no specific limitation is made here.

[0067] It should also be noted that the cross-section mentioned here refers to the cross-section perpendicular to the sound absorption inlet 23.

[0068] From the above relational expressions, when the sound absorption structure 2 is at different depths x less than the depth l0 of the cross-section of the converging region, the truncation width value of the cross-section of the converging region is equal to the cross-section width value when the sound absorption structure 2 extends from the converging region to the sound absorption region. That is, it is ensured that within the converging region, the truncation width value of the cross-section of the converging region does not change with the depth of the sound absorption structure 2, ensuring that the cross-sectional dimensions of the converging region are the same, enabling the sound wave energy to be transmitted towards the converging region through the sound absorption region and to be concentrated within the converging region, facilitating the sound absorption and noise reduction of the porous sound absorption matrix 1.

[0069] When the sound absorption structure 2 is at different depths x greater than the depth l0 of the cross-section of the converging region, the cross-section width value when the sound absorption structure 2 extends from the converging region to the sound absorption region changes in a power-exponential function relationship with the depth of the sound absorption structure 2. That is, the cross-section width value when the sound absorption structure 2 extends from the converging region to the sound absorption region increases with the increase in the depth of the sound absorption structure 2, facilitating the formation of an inverted curved surface conical columnar structure in the sound absorption region, that is, an acoustic black hole structure. The concept of an acoustic black hole is similar to the concept of a black hole in astrophysics, referring to gradually reducing the phase velocity and group velocity of sound waves, and ideally reducing them to 0, so that no sound wave reflection occurs, and all sound wave energy can be concentrated in the converging region, generating a sound wave aggregation effect and forming a high energy density region. Subsequently, the sound wave energy is absorbed through the sound absorption holes 13 in the porous sound absorption matrix 1, improving the noise reduction ability of the wheel sound absorption and noise reduction device 100.

[0070] Optionally, the value range of r0 is from 0.1 mm to 1 mm. When the value range of r0 is less than 0.1 mm, the truncation width value of the cross-section of the converging region is small, which is not conducive to processing and forming the converging region and increases the manufacturing difficulty; when the value range of r0 is greater than 1 mm, the size of the truncation width value of the cross-section of the converging region increases, resulting in a large truncation width value of the cross-section of the converging region, and then increasing the width value of the sound absorption inlet 23. Since the sound absorption inlet 23 is formed on the surface of the porous sound absorption matrix 1 and the surface size of the porous sound absorption matrix 1 is certain, the larger the width value of the sound absorption inlet 23, the corresponding reduction in the number of the sound absorption inlets 23, and then the reduction in the number of the sound absorption structures 2, reducing the sound absorption capacity of the porous sound absorption matrix 1. Therefore, the value range of r0 is set to 0.1 mm to 1 mm, which can reduce the manufacturing difficulty, facilitate the formation of the converging region and improve the sound absorption and noise reduction ability of the porous sound absorption matrix 1 at the same time.

[0071] Optionally, the value range of R is from 2 mm to 5 mm. Since the cross-sectional size gradually decreases when the sound absorption region extends from the sound absorption inlet 23 to the converging region, when the value range of R is less than 2 mm, the truncation width value of the cross-section of the converging region is much less than 2 mm, resulting in a small truncation width value of the cross-section of the converging region, which is not conducive to processing and forming the converging region and increases the manufacturing difficulty; when the value range of R is greater than 5 mm, the number of the sound absorption structures 2 is reduced, and the sound absorption capacity of the porous sound absorption matrix 1 is reduced. Therefore, the value range of R is set to 2 mm to 5 mm, which can reduce the manufacturing difficulty, facilitate the formation of the converging region and improve the sound absorption and noise reduction ability of the porous sound absorption matrix 1 at the same time.

[0072] It should be noted that since the sound absorption inlet 23 and the converging region are arranged at both ends of the sound absorption region, setting the value range of r0 to 0.1 mm to 1 mm and the value range of R to 2 mm to 5 mm can ensure a certain difference between the width value of the sound absorption inlet 23 and the truncation width value of the cross-section of the converging region, facilitating the formation of a sound absorption region with a gradually decreasing cross-sectional size between the sound absorption inlet 23 and the converging region.

[0073] In some embodiments of the present invention, as Figure 4 shown, the sound absorption structure 2 is a sound absorption hole 21, and one end of the sound absorption hole 21 forms a sound absorption inlet 23. The sound absorption inlet 23 realizes the communication between the sound absorption hole 21 and the external air, ensuring that the sound wave energy can be gathered into the sound absorption hole 21 through the sound absorption inlet 23.

[0074] Optionally, the converging region is formed into a columnar first sound absorption hole 211. The columnar first sound absorption hole 211 can ensure that the radius size at any place in the first sound absorption hole 211 is the same, which helps the sound wave energy to enter the sound absorption structure 2 through the sound absorption inlet 23 and gather in the converging region.

[0075] Optionally, the sound absorption region is formed as a second sound absorption hole 212 of an inverted curved surface conical columnar body, and the cross-sectional radius of the second sound absorption hole 212 has a power exponential function relationship with the depth of the second sound absorption hole 212. When the sound wave energy enters the second sound absorption hole 212 through the sound absorption inlet 23, due to the change in the structural dimensions of the second sound absorption hole 212, the sound wave velocity gradually decreases, and the sound wave is propagated along the extension direction of the second sound absorption hole 212 to the converging region, concentrating the sound wave energy at the position of the converging region, facilitating the absorption by the sound absorption holes 13 in the porous sound absorption matrix 1, thereby improving the noise reduction ability of the wheel sound absorption and noise reduction device 100.

[0076] In the description of the present invention, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe the features, without order or importance.

[0077] It should be noted that when the sound absorption structure 2 is a sound absorption hole 21, r in the above relationship represents the radius at any position in the second sound absorption hole 212, x represents the depth at any position of the sound absorption structure 2, r0 represents the radius of the first sound absorption hole 211; l0 represents the depth of the first sound absorption hole 211, R is the radius of the sound absorption inlet 23; L is the total depth of the sound absorption structure 2.

[0078] Optionally, as Figure 4 shown, fixing surfaces 11 and sound absorption surfaces 12 are respectively formed on opposite side surfaces of the porous sound absorption matrix 1. The fixing surface 11 is adapted to be attached to the inner surface of the tire 300. A plurality of sound absorption holes 21 extend from the fixing surface 11 towards the side of the sound absorption surface 12, and a sound absorption inlet 23 is formed on the sound absorption surface 12. By providing the fixing surface 11 on the porous sound absorption matrix 1, the fixing surface 11 can attach the porous sound absorption matrix 1 to the tire 300, realizing the fixed connection between the porous sound absorption matrix 1 and the tire 300. The porous sound absorption matrix 1 is in a stable position and can effectively absorb sound wave energy, achieving the purpose of sound absorption and noise reduction.

[0079] Optionally, the shape of the fixing surface 11 matches the shape of the inner surface of the tire 300. Ensure that the porous sound absorption matrix 1 can be closely attached to the inner surface of the tire 300 through the fixing surface 11.

[0080] Optionally, the fixing surface 11 can be attached to the inner surface of the tire 300 through a strong double-sided adhesive or a sealing layer. It is used to increase the connection strength between the porous sound absorption matrix 1 and the inner surface of the tire 300, ensuring that the porous sound absorption matrix 1 can effectively absorb the cavity resonance noise of the tire, achieving the purpose of sound absorption and noise reduction.

[0081] It should be noted that the above structure means that one side surface of the porous sound absorption matrix 1 is a sound absorption surface 12, and the sound absorption surface 12 is formed on one side surface of the porous sound absorption matrix 1 and is arranged away from the inner surface of the tire 300.

[0082] Optionally, asFigure 5 As shown, one side of the porous sound-absorbing matrix 1 is adapted to be connected to the tire 300, and a plurality of sound-absorbing holes 21 are arranged in multiple rows on the porous sound-absorbing matrix 1; the sound-absorbing inlets 23 of the multiple rows of sound-absorbing holes 21 are respectively located on different surfaces of the porous sound-absorbing matrix 1 spaced apart from the tire 300. By arranging the sound-absorbing inlets 23 of the multiple rows of sound-absorbing holes 21 on different surfaces of the porous sound-absorbing matrix 1, so that multiple sides of the porous sound-absorbing matrix 1 all form sound-absorbing surfaces 12, further improving the sound-absorbing and noise-reducing ability of the wheel sound-absorbing and noise-reducing device 100.

[0083] In a specific example, in combination with Figure 6 and Figure 7 As shown, the sound-absorbing holes 21 are symmetrically arranged on opposite side surfaces of the porous sound-absorbing matrix 1 and extend along the width direction of the porous sound-absorbing matrix 1. The multiple rows of sound-absorbing holes 21 simultaneously transfer the sound wave energy into the porous sound-absorbing matrix 1, and the sound-absorbing holes 13 in the porous sound-absorbing matrix 1 absorb the sound wave energy, thereby improving the noise-reducing ability of the wheel sound-absorbing and noise-reducing device 100.

[0084] Optionally, as Figure 3 shown, the porous sound-absorbing matrix 1 is formed with dense sound-absorbing holes 13, and the diameter of the sound-absorbing holes 13 is 2 μm to 200 μm. When the diameter of the sound-absorbing holes 13 is less than 2 μm, it will cause the size of the sound-absorbing holes 13 to be small, which is not conducive to the processing and forming of the porous sound-absorbing matrix 1 and increases the manufacturing difficulty; when the diameter of the sound-absorbing holes 13 is greater than 200 μm, since the volume of the porous sound-absorbing matrix 1 is certain, the number of the sound-absorbing holes 13 will decrease correspondingly as the diameter of the sound-absorbing holes 13 increases, resulting in the sound wave energy being unable to effectively impact the hole walls of the sound-absorbing holes 13 during the transmission process, reducing the sound-absorbing ability of the porous sound-absorbing matrix 1. Therefore, the diameter of the sound-absorbing holes 13 in the porous sound-absorbing matrix 1 is set to 2 μm to 200 μm, which can reduce the manufacturing difficulty, facilitate the formation of the porous sound-absorbing matrix 1 and at the same time improve the sound-absorbing and noise-reducing ability of the porous sound-absorbing matrix 1.

[0085] Optionally, the distance between two adjacent sound absorption holes 21 is 0.5 mm to 5 mm. When the distance between two adjacent sound absorption holes 21 is less than 0.5 mm, during the manufacturing process of the sound absorption holes 21, due to the errors of the processing machine, it is easy to cause two adjacent sound absorption holes 21 to communicate with each other, which is not conducive to processing into a plurality of sound absorption structures 2; when the distance between two adjacent sound absorption holes 21 is greater than 5 mm, since the surface size of the porous sound absorption matrix 1 is certain, the larger the distance between two adjacent sound absorption holes 21, the fewer the number of sound absorption holes 21. The fewer sound absorption holes 21 will not only fail to ensure good sound absorption and shock absorption capabilities but also increase the weight of the porous sound absorption matrix 1, making it impossible to achieve the lightweight of the porous sound absorption matrix 1. Therefore, setting the distance between two adjacent sound absorption holes 21 to 0.5 mm to 5 mm can reduce the manufacturing difficulty, facilitate the formation of the porous sound absorption matrix 1, improve the sound absorption and noise reduction capabilities of the porous sound absorption matrix 1, and achieve the lightweight of the porous sound absorption matrix 1.

[0086] Of course, in some other examples, the diameter of the sound absorption holes 13 and the distance between two adjacent sound absorption holes 21 are not limited to the above settings, and those skilled in the art can also select the appropriate diameter of the sound absorption holes 13 and the distance between two adjacent sound absorption holes 21 according to the specific noise reduction frequency band and the cavity size of the tire 300.

[0087] In some embodiments of the present invention, as shown in Figure 8 、 Figure 9 and Figure 10 the sound absorption structure 2 is a sound absorption groove 22, and the sound absorption inlets 23 of each sound absorption groove 22 are all arranged on the same surface. The sound absorption groove 22 includes a first sound absorption groove 221 formed by a converging region and a second sound absorption groove 222 formed by a sound absorption region. The cross-sectional widths of the first sound absorption grooves 221 are all equal, and the cross-sectional width of the second sound absorption groove 222 and the depth of the second sound absorption groove 222 are in a power exponential function relationship. Through the sound absorption inlet 23, the cavity resonance noise generated during the vehicle driving can be gathered into the sound absorption groove 22. Since the cross-sectional width of the second sound absorption groove 222 and the depth of the second sound absorption groove 222 are in a power exponential function relationship, based on the acoustic black hole energy convergence mechanism, the second sound absorption groove 222 can gather the sound wave energy at one end of the sound absorption groove 22 far from the sound absorption inlet 23, which is convenient for the sound absorption holes 13 in the porous sound absorption matrix 1 to absorb, thereby improving the sound absorption and noise reduction capabilities of the wheel sound absorption and noise reduction device 100.

[0088] Optionally, as shown in Figure 11As shown, one side of the porous sound-absorbing substrate 1 is attached to the inner surface of the tire 300, and a plurality of sound-absorbing grooves 22 extend towards the side away from the inner surface of the tire 300 and form a plurality of sound-absorbing grooves 22 on the porous sound-absorbing substrate 1. Attaching the porous sound-absorbing substrate 1 to the inner surface of the tire 300 realizes the fixed connection between the porous sound-absorbing substrate 1 and the tire 300, ensures the stable position of the porous sound-absorbing substrate 1, and ensures that the sound wave energy can be concentrated in the first sound-absorbing groove 221 through the second sound-absorbing groove 222 and absorbed through the sound-absorbing holes 13 in the porous sound-absorbing substrate 1, so as to achieve the purpose of sound absorption and noise reduction of the wheel sound absorption and noise reduction device 100.

[0089] It should be noted that since the cross-sectional width of the second sound-absorbing groove 222 and the depth of the second sound-absorbing groove 222 are in a power-exponential function relationship, when the second sound-absorbing groove 222 has a certain depth, a wedge-shaped body can be formed in the structure of the porous sound-absorbing substrate 1 between two adjacent sound-absorbing grooves 22. The wedge-shaped body can increase the reflection of the sound wave energy in the cavity of the tire 300 and concentrate the sound wave energy in the second sound-absorbing groove 222.

[0090] Next, the wheel 1000 of the embodiment of the present invention will be described with reference to the accompanying drawings of the specification.

[0091] A wheel 1000 according to an embodiment of the present invention, as Figure 1 shown, includes: a rim 200, a wheel sound absorption and noise reduction device 100, and a tire 300.

[0092] Among them, the wheel sound absorption and noise reduction device 100 is the aforementioned wheel sound absorption and noise reduction device 100.

[0093] Combined with Figure 1 and Figure 2 shown, the tire 300 is installed on the outer side of the rim 200, and the porous sound-absorbing substrate 1 is connected to the side of the tire 300 facing the rim 200. That is to say, the wheel sound absorption and noise reduction device 100 is connected to the side of the tire 300 facing the rim 200 and is located in the cavity formed by the tire 300 and the rim 200.

[0094] From the above structure, it can be seen that for the wheel 1000 of the embodiment of the present invention, by connecting the aforementioned wheel sound absorption and noise reduction device 100 to the tire 300, on the one hand, during the driving of the vehicle, the wheel sound absorption and noise reduction device 100 can absorb the cavity resonance noise generated in the cavity, improve the noise reduction ability of the tire 300, and meet the requirements of a low-noise tire; on the other hand, since a plurality of sound-absorbing structures 2 are provided on the aforementioned wheel sound absorption and noise reduction device 100, the weight of the wheel sound absorption and noise reduction device 100 is relatively light. Setting the wheel sound absorption and noise reduction device 100 with a relatively light weight on the tire 300 can realize the lightweight of the tire 300, and further make the fuel of the vehicle more economical and the handling more stable.

[0095] In some embodiments of the present invention, the maximum width of the porous sound-absorbing matrix 1 is 60% to 90% of the width of the tire 300. When the maximum width of the porous sound-absorbing matrix 1 is less than 60% of the width of the tire 300, the width of the porous sound-absorbing matrix 1 will be relatively narrow. Correspondingly, the surface area of the porous sound-absorbing matrix 1 will be relatively small, resulting in a reduction in the sound-absorbing inlets 23 provided on the surface of the porous sound-absorbing matrix 1 and a decrease in the sound-absorbing ability. When the maximum width of the porous sound-absorbing matrix 1 is greater than 90% of the width of the tire 300, when the porous sound-absorbing matrix 1 is disposed on the side surface of the tire 300, the porous sound-absorbing matrix 1 will increase the weight of the tire 300 and it is impossible to achieve the lightweight of the tire 300. Therefore, by setting the maximum width of the porous sound-absorbing matrix 1 to 60% to 90% of the width of the tire 300, while meeting the requirements of a low-noise tire, the weight of the tire 300 can be reduced and the lightweight of the tire 300 can be achieved.

[0096] Optionally, the overall height of the porous sound-absorbing matrix 1 is 20 mm to 80 mm. Since the sound-absorbing structure 2 with a certain depth is provided inside the porous sound-absorbing matrix 1, when the overall height of the porous sound-absorbing matrix 1 is less than 20 mm, it is not conducive to forming a converging region with the same cross-sectional size and a sound-absorbing region with a gradually increasing cross-sectional size when extending from the converging region to the surface of the porous sound-absorbing matrix 1, thereby reducing the sound-absorbing and noise-reducing ability of the porous sound-absorbing matrix 1. When the overall height of the porous sound-absorbing matrix 1 is greater than 80 mm, the porous sound-absorbing matrix 1 with an excessively high overall height will increase the material consumption during production, increase the production cost, and the weight of the porous sound-absorbing matrix 1 with more material used will also increase, making it impossible to achieve the lightweight of the porous sound-absorbing matrix 1. Therefore, the overall height of the porous sound-absorbing matrix 1 is set between 20 mm and 80 mm. While ensuring that the porous sound-absorbing matrix 1 can effectively absorb and reduce noise, the weight of the porous sound-absorbing matrix 1 can be reduced, and the lightweight of the tire 300 can be achieved by attaching the porous sound-absorbing matrix 1 to the tire 300.

[0097] In some embodiments of the present invention, the wheel sound-absorbing and noise-reducing device 100 is continuously arranged along the circumferential direction of the tire 300 and connected end to end. The wheel sound-absorbing and noise-reducing device 100 connected end to end forms an integral body for the wheel sound-absorbing and noise-reducing device 100 attached to the circumferential direction of the tire 300, increasing the volume of the porous sound-absorbing matrix 1 inside the tire 300, thereby maximizing the number of the sound-absorbing structures 2 and improving the sound-absorbing and noise-reducing ability of the wheel sound-absorbing and noise-reducing device 100, so that the tire 300 meets the requirements of a low-noise tire.

[0098] Of course, in some other examples, the wheel sound absorption and noise reduction device 100 is not limited to the above-mentioned end-to-end arrangement. The length of the wheel sound absorption and noise reduction device 100 can also be less than the circumference of the tire 300, and multiple wheel sound absorption and noise reduction devices 100 are arranged at circumferential intervals on the tire 300. The wheel sound absorption and noise reduction devices 100 arranged at circumferential intervals can reduce the material used in the production and manufacturing of the wheel sound absorption and noise reduction device 100, achieve the lightweight of the wheel sound absorption and noise reduction device 100 while reducing the production cost of the wheel sound absorption and noise reduction device 100, and further achieve the lightweight of the tire 300 when the wheel sound absorption and noise reduction device 100 is attached to the tire 300, thereby improving the fuel economy and handling stability of the vehicle.

[0099] It should be noted that when multiple wheel sound absorption and noise reduction devices 100 are arranged at circumferential intervals on the tire 300, the distance between adjacent two wheel sound absorption and noise reduction devices 100 is not specifically limited, and those skilled in the art can set it according to the specific noise reduction frequency band and the cavity size of the tire 300.

[0100] In a specific example, the wheel sound absorption and noise reduction device 100 is arranged at the central position of the tire 300 along the width direction of the tire 300. Since the contact surface between the central position in the width direction of the tire 300 and the road surface is the largest, the noise generated at the central position in the width direction is also the largest. Arranging the wheel sound absorption and noise reduction device 100 at the central position of the tire 300 along the width direction of the tire 300 can further improve the noise reduction ability of the tire 300.

[0101] Of course, in some other examples, the wheel sound absorption and noise reduction device 100 can also be arranged on any one side in the width direction of the tire 300, without specific limitation.

[0102] Next, the specific structures of the wheel sound absorption and noise reduction device 100 and the wheel 1000 having the same in the specific embodiments of the present invention will be described with reference to the accompanying drawings of the specification. The embodiments of the present invention can be all the embodiments after combining the foregoing multiple technical solutions, and are not limited to the following specific embodiments, and all of these fall within the protection scope of the present invention.

[0103] Embodiment 1

[0104] A wheel sound absorption and noise reduction device 100, as Figure 2 shown, includes: a porous sound absorption matrix 1 and a plurality of sound absorption structures 2.

[0105] Among them, as shown in combination with Figure 2 and Figure 3 shown, a plurality of sound absorption structures 2 are arranged on the porous sound absorption matrix 1, and each sound absorption structure 2 has a sound absorption inlet 23 extending to the surface of the porous sound absorption matrix 1.

[0106] As Figure 3As shown, the sound absorption structure 2 includes a converging region and a sound absorption region.

[0107] The converging region is provided in the porous sound absorption matrix 1, and the cross-sectional dimensions of the converging region are the same.

[0108] One end of the sound absorption region is connected to the converging region, and the other end of the sound absorption region forms a sound absorption inlet 23; the cross-sectional dimensions gradually increase when the sound absorption region extends from the converging region towards the surface of the porous sound absorption matrix 1.

[0109] Embodiment 2

[0110] A wheel sound absorption and noise reduction device 100, on the basis of Embodiment 1, as Figure 4 shown, the sound absorption structure 2 is a sound absorption hole 21, and one end of the sound absorption hole 21 forms a sound absorption inlet 23.

[0111] The converging region is formed as a columnar first sound absorption hole 211, and the sound absorption region is formed as a second sound absorption hole 212 in the shape of an inverted curved conical column, and the cross-sectional radius of the second sound absorption hole 212 has a power exponential function relationship with the depth of the second sound absorption hole 212.

[0112] Embodiment 3

[0113] A wheel sound absorption and noise reduction device 100, on the basis of Embodiment 2, as Figure 4 shown, opposite sides of the porous sound absorption matrix 1 respectively form a fixing surface 11 and a sound absorption surface 12, the fixing surface 11 is adapted to be attached to the inner surface of the tire 300, and a plurality of sound absorption holes 21 extend from the fixing surface 11 towards the sound absorption surface 12, and a sound absorption inlet 21 is formed on the sound absorption surface 12.

[0114] Embodiment 4

[0115] A wheel sound absorption and noise reduction device 100, on the basis of Embodiment 2, as Figure 5 shown, one side of the porous sound absorption matrix 1 is adapted to be connected to the tire 300, and a plurality of sound absorption holes 21 are arranged in multiple rows on the porous sound absorption matrix 1.

[0116] The sound absorption inlets 21 of the multiple rows of sound absorption holes 21 are respectively located on different surfaces where the porous sound absorption matrix 1 is spaced apart from the tire 300.

[0117] Embodiment 5

[0118] A wheel sound absorption and noise reduction device 100, on the basis of Embodiment 1, in combination with Figure 9 and Figure 10As shown, the sound absorption structure 2 is a sound absorption groove 22. The sound absorption inlets 21 of each sound absorption groove 22 are all provided on the same plane. The sound absorption groove 22 includes a first sound absorption groove 221 formed by a converging region and a second sound absorption groove 222 formed by a sound absorption region. The cross-sectional widths of the first sound absorption grooves 221 are all equal, and the cross-sectional width of the second sound absorption groove 222 has a power-exponential function relationship with the depth of the second sound absorption groove 222.

[0119] Example 6

[0120] A wheel 1000, as Figure 1 shown, includes: a rim 200, a wheel sound absorption and noise reduction device 100, and a tire 300.

[0121] Among them, the wheel sound absorption and noise reduction device 100 is the wheel sound absorption and noise reduction device 100 in Example 1.

[0122] Combined with Figure 1 and Figure 2 shown, the tire 300 is installed on the outer side of the rim 200, and the porous sound absorption matrix 1 is connected to one side surface of the tire 300 facing the rim 200.

[0123] Example 7

[0124] A wheel 1000, on the basis of Example 6, the wheel sound absorption and noise reduction devices 100 are arranged continuously along the circumferential direction of the tire 300 and are connected end to end.

[0125] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0126] For other components of the wheel sound absorption and noise reduction device 100 and the wheel 1000 having the same according to the embodiments of the present invention, such as the sound absorption principle of the porous sound absorption matrix 1, are known to those of ordinary skill in the art and will not be described in detail here.

[0127] In the description of this specification, the descriptions referring to the terms "embodiment", "example", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0128] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A wheel sound absorption and noise reduction device, characterized in that, Comprising: A porous sound-absorbing substrate; A plurality of sound-absorbing structures, the plurality of sound-absorbing structures being provided on the porous sound-absorbing substrate, and each sound-absorbing structure having a sound-absorbing inlet extending to the surface of the porous sound-absorbing substrate; the sound-absorbing structure includes: A converging region, the converging region being provided within the porous sound-absorbing substrate, and the cross-sectional dimensions of the converging region being the same; A sound-absorbing region, one end of the sound-absorbing region being connected to the converging region, and the other end of the sound-absorbing region forming the sound-absorbing inlet; the cross-sectional dimensions of the sound-absorbing region gradually increase when extending from the converging region towards the surface of the porous sound-absorbing substrate; When the sound-absorbing structure extends from the converging region to the sound-absorbing region, half of the width value r of the cross-section and the sound-absorbing structure at different depths x satisfy the following relationship: Wherein, r0 is half of the truncated width value of the cross-section of the converging region; l0 is the depth of the cross-section of the converging region; R is half of the width value of the sound-absorbing inlet; L is the total depth of the sound-absorbing structure; where m is greater than 2, the value range of r0 is 0.1 mm to 1 mm, and the value range of R is 2 mm to 5 mm; Alternatively, the sound-absorbing structure is a sound-absorbing hole, one end of the sound-absorbing hole forming the sound-absorbing inlet; the converging region is formed as a columnar first sound-absorbing hole, and the sound-absorbing region is formed as an inverted curved surface conical columnar second sound-absorbing hole, and the cross-sectional radius of the second sound-absorbing hole and the depth of the second sound-absorbing hole are in a power-exponential function relationship; Alternatively, the sound-absorbing structure is a sound-absorbing groove, the sound-absorbing inlets of each sound-absorbing groove are all provided on the same surface, the sound-absorbing groove includes a first sound-absorbing groove formed by the converging region and a second sound-absorbing groove formed by the sound-absorbing region, the cross-sectional widths of the first sound-absorbing grooves are all equal, and the cross-sectional width of the second sound-absorbing groove and the depth of the second sound-absorbing groove are in a power-exponential function relationship.

2. The wheel sound absorption and noise reduction device according to claim 1, characterized in that The opposite two side surfaces of the porous sound-absorbing substrate respectively form a fixing surface and a sound-absorbing surface, the fixing surface is adapted to be attached to the inner surface of the tire, and the plurality of sound-absorbing holes extend from the fixing surface towards the sound-absorbing surface side, and the sound-absorbing inlets are formed on the sound-absorbing surface.

3. The wheel sound absorption and noise reduction device according to claim 1, characterized in that, One side surface of the porous sound-absorbing substrate is adapted to be connected to the tire, and the plurality of sound-absorbing holes are arranged in multiple rows on the porous sound-absorbing substrate; the sound-absorbing inlets of the multiple rows of sound-absorbing holes are respectively located on different surfaces spaced apart from the porous sound-absorbing substrate and the tire.

4. The wheel sound absorption and noise reduction device according to claim 2 or 3, characterized in that, Dense sound-absorbing holes are formed within the porous sound-absorbing substrate, the diameter of the sound-absorbing holes is 2 μm to 200 μm, and the distance between adjacent two sound-absorbing holes is 0.5 mm to 5 mm.

5. A wheel, characterized in that, Comprising: A rim; A wheel sound-absorbing and noise-reducing device, the wheel sound-absorbing and noise-reducing device being the wheel sound-absorbing and noise-reducing device according to any one of claims 1-4; A tire, the tire being mounted on the outer side of the rim, and the porous sound-absorbing substrate being connected to one side surface of the tire facing the rim.

6. The wheel according to claim 5, wherein The maximum width of the porous sound-absorbing substrate is 60% to 90% of the tire width; the overall height of the porous sound-absorbing substrate is 20 mm to 80 mm.

7. The wheel according to claim 5, characterized in that, The wheel sound absorption and noise reduction device is continuously arranged along the circumferential direction of the tire and is connected end to end; Alternatively, the length of the wheel sound absorption and noise reduction device is less than the circumference of the tire, and multiple segments of the wheel sound absorption and noise reduction device are arranged at circumferential intervals of the tire.

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