Lightweight noise-reducing wheels with embedded acoustic structure

Abstract

This invention discloses a lightweight noise-reducing wheel with an embedded acoustic structure, comprising a rim, spokes, and a quarter-wavelength tube sound-absorbing assembly. The rim is a plastically formed aluminum alloy part, including a groove bottom wall, an inclined wall, and a rim platform. One end of the groove bottom wall is connected to one end of the inclined wall, and the other end is connected to one end of the rim platform. The spokes are aluminum alloy castings, with a first platform and a second platform radially spaced from the first platform on one side. One end of the first platform is fixed to the groove bottom wall, and one end of the second platform is fixed to the other end of the rim platform. The inclined wall, rim platform, second platform, the portion of the rim between the second and first platforms, and the first platform together define an annular cavity. The quarter-wavelength tube sound-absorbing assembly is disposed in the annular cavity to suppress tire cavity resonance noise. This invention effectively reduces wheel weight, has good noise reduction effect, low cost, simple structure, convenient installation, and good versatility.

Description

Technical Field

[0001] This invention relates to the field of lightweight noise-reducing wheel technology, and in particular to a lightweight noise-reducing wheel with an embedded acoustic structure. Background Technology

[0002] The lightweighting effect of unsprung, rotating parts such as wheels is generally better than that of sprung, translational parts in automobiles, making lightweighting of unsprung, rotating parts such as wheels an important research area in automotive lightweighting. Meanwhile, the NVH characteristics of automobiles are important indicators for evaluating vehicle comfort. With the continuous reduction of vibration and noise in automotive powertrains and the promotion of new energy vehicles, tire cavity resonance noise has become a prominent issue affecting vehicle NVH performance. When a car is in motion, the uneven contact between the road surface and the tire tread excites broadband vibrations in the tire, causing resonance in the cavity system formed between the wheel rim and the inner surface of the tire. Standing waves are formed within the cavity, which in turn cause wheel vibration. This vibrational energy is then transmitted to the vehicle interior through the suspension system, generating in-vehicle noise and negatively impacting the overall NVH performance of the vehicle.

[0003] Currently, most aluminum alloy wheels use the same alloy material for both the spokes and rims, manufactured through casting or forging and subsequent machining. For cast aluminum wheels, which are most commonly used in passenger vehicles, both the spokes and rims are integrally cast from A356 aluminum alloy, which has excellent casting properties. However, A356 aluminum alloy has relatively low structural strength, making further weight reduction difficult.

[0004] In the application of reactive mufflers, existing tire cavity resonance noise reduction technology utilizes the Helmholtz resonance principle. Acoustic structures such as Helmholtz resonators are externally mounted on the integrally cast wheel rim through methods such as adhesion, overlapping, or welding. Channels are created in the contact area between the auxiliary air chamber and the tire cavity to connect them, thereby suppressing tire cavity resonance noise. In existing technical solutions, quarter-wavelength tubes are mainly used in muffler design for engine intake systems, and there are no design solutions specifically for suppressing tire cavity resonance noise.

[0005] Existing acoustic structures for suppressing tire cavity resonance employ methods such as adhesion, overlapping, or welding to modify the internal shape of the tire to create Helmholtz resonant cavities. This not only increases the complexity of the manufacturing process and results in poor device durability and high maintenance costs, but also increases the weight of the wheel, contradicting the requirements for lightweight wheels. Furthermore, utilizing the Helmholtz resonance principle requires considering the phenomenon that the tire cavity resonance frequency splits with changes in road load and driving speed. Because Helmholtz resonators have a strong selectivity for sound wave frequencies, using a single Helmholtz resonator tuned to a specific frequency is insufficient for effective sound absorption. Designing multiple resonators tuned to different frequencies to address a wide frequency range of tire cavity resonance noise is challenging and difficult to optimize, lacking universality. Summary of the Invention

[0006] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to propose a lightweight noise-reducing wheel with an embedded acoustic structure, which can effectively reduce the weight of the wheel, has good noise reduction effect, low cost, simple structure, convenient installation and good universality.

[0007] The lightweight noise-reducing wheel with an embedded acoustic structure according to an embodiment of the present invention includes:

[0008] The wheel rim is a plastically formed aluminum alloy part. The wheel rim includes a groove bottom wall, an inclined wall, and a wheel rim platform. One end of the groove bottom wall is connected to one end of the inclined wall, and the other end of the inclined wall is connected to one end of the wheel rim platform.

[0009] The spokes are aluminum alloy castings. One side of the spokes is provided with a first platform and a second platform, and there is a radial distance between the first platform and the second platform. One end of the first platform is fixed to the bottom wall of the groove, and one end of the second platform is fixed to the other end of the rim platform. The inclined wall, the rim platform, the second platform, the portion of the rim between the second platform and the first platform, and the first platform together define an annular cavity.

[0010] A quarter-wavelength tube sound-absorbing assembly is disposed in the annular cavity to suppress tire cavity resonance noise.

[0011] According to an embodiment of the present invention, a lightweight noise-reducing wheel with an embedded acoustic structure is first placed between the first platform and the second platform of the wheel spoke. Then, the bottom wall of the groove of the wheel rim is fixed to one end of the first platform of the wheel spoke by friction stir welding. The other end of the wheel rim platform is fixed to one end of the second platform by friction stir welding. The quarter-wavelength tube sound-absorbing assembly is located in an annular cavity defined by the inclined wall, the wheel rim platform, the second platform, the part of the wheel rim between the second platform and the first platform, and the first platform. The inclined wall of the wheel rim presses against the quarter-wavelength tube sound-absorbing assembly.

[0012] According to an embodiment of the present invention, the lightweight noise-reducing wheel with an embedded acoustic structure features a rim integrally formed from an aluminum alloy plate through plastic molding, and spokes integrally cast from an aluminum alloy plate. The rim and spokes are welded together by friction stir welding to define an annular cavity, effectively reducing the wheel's weight. This annular cavity also facilitates the placement of a quarter-wavelength tube sound-absorbing assembly, avoiding the need for connecting parts or welding to install the assembly. This further reduces wheel weight and provides excellent noise reduction. In summary, the lightweight noise-reducing wheel with an embedded acoustic structure according to the present invention effectively reduces wheel weight, offers good noise reduction, is low-cost, has a simple structure, is easy to install, and has good versatility.

[0013] According to one embodiment of the present invention, the quarter-wavelength tube assembly includes a circular tube and a partition, the partition being disposed inside the circular tube to divide the circular tube cavity into multiple independent sub-cavities in the circumferential direction; the circular tube is provided with multiple protruding through holes communicating with the multiple sub-cavities respectively, and the inclined wall of the rim is provided with an opening for the multiple protruding through holes to pass through respectively, the multiple protruding through holes communicating with the tire cavity through the openings.

[0014] According to a further embodiment of the present invention, the annular cavity of the annular tube is divided into an inner annular cavity and an outer annular cavity that are not connected to each other in the radial direction; the partitions are an inner partition and an outer partition; the inner annular cavity is divided into a plurality of independent inner sub-cavities in the circumferential direction by the inner partitions, and the outer annular cavity is divided into a plurality of independent outer sub-cavities in the circumferential direction by the outer partitions, wherein the outer partitions and the inner partitions are offset from each other in the circumferential direction; the outward protruding through holes are divided into an inner outward protruding through hole corresponding to the inner sub-cavities and an outer outward protruding through hole corresponding to the outer sub-cavities, and the openings are divided into an inner opening and an outer opening, the inner outward protruding through hole correspondingly passes through the inner opening and communicates with the tire cavity, and the outer outward protruding through hole correspondingly passes through the outer opening and communicates with the tire cavity.

[0015] According to one embodiment of the present invention, the quarter-wavelength tube assembly is fixed to the wall of the annular cavity by an adhesive layer.

[0016] According to one embodiment of the present invention, one end of the first platform is located on the inner circumferential surface of the bottom wall of the tank, and the first platform is fixed to the bottom wall of the tank by an axial weld, the axial weld being located between the first platform and the inner circumferential surface of the bottom wall of the tank.

[0017] According to one embodiment of the present invention, one end of the second platform is provided with a step, and the other end of the rim platform is located on the step, and the other end of the rim platform is fixed to the step by a radial weld.

[0018] According to one embodiment of the present invention, the outer surface of the rim platform in the radial direction is flush with the outer surface of the second platform in the radial direction.

[0019] According to some embodiments of the present invention, the rim platform and the second platform are fixedly connected to form the first bead seat of the wheel.

[0020] According to some embodiments of the present invention, the rim is a 6061 aluminum alloy plastic-formed part; the spokes are A356 aluminum alloy castings.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a perspective view of a lightweight noise-reducing wheel with an embedded acoustic structure according to an embodiment of the present invention.

[0024] Figure 2 This is a partial cross-sectional view of a lightweight noise-reducing wheel with an embedded acoustic structure according to an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the structure of a quarter-wavelength tube sound-absorbing assembly for a lightweight noise-reducing wheel with an embedded acoustic structure, according to another embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the quarter-wavelength tube structure in the quarter-wavelength tube sound absorption assembly of the lightweight noise-reducing wheel with embedded acoustic structure, according to another embodiment of the present invention.

[0027] Figure 5This is a partial structural diagram of a quarter-wavelength tube sound-absorbing assembly for a lightweight noise-reducing wheel with an embedded acoustic structure, according to another embodiment of the present invention, wherein the quarter-wavelength tube sound-absorbing assembly is in a straightened state.

[0028] Figure label:

[0029] Lightweight noise-reducing wheels with embedded acoustic structure 1000

[0030] Rim 1

[0031] 11 Bottom wall of the groove; 12 Sloping wall; 121 Opening; 13 Rim platform

[0032] 2 spokes

[0033] First platform 21, Second platform 22, Steps 221

[0034] Quarter-wavelength tube sound absorption assembly 3

[0035] Circular tube 31, sub-cavity 311, outer sub-cavity 3111, inner sub-cavity 3112, outwardly protruding through hole 312

[0036] Inner convex through hole 3121, outer convex through hole 3122, annular cavity 313, inner annular cavity 3131

[0037] Outer annular cavity 3132, partition 32, inner partition 321, outer partition 322

[0038] Annular cavity 4

[0039] Adhesive layer 5

[0040] Axial weld 6

[0041] Radial weld 7 Detailed Implementation

[0042] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote 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 limiting the present invention.

[0043] The following is combined with Figures 1 to 5 This invention describes a lightweight noise-reducing wheel 1000 with an embedded acoustic structure, according to an embodiment of the present invention.

[0044] like Figures 1 to 5As shown, the lightweight noise-reducing wheel 1000 with an embedded acoustic structure according to an embodiment of the present invention includes a rim 1, spokes 2, and a quarter-wavelength tube sound-absorbing assembly 3. The rim 1 is a plastically formed aluminum alloy part, and includes a groove bottom wall 11, an inclined wall 12, and a rim platform 13. One end of the groove bottom wall 11 is connected to one end of the inclined wall 12, and the other end of the inclined wall 12 is connected to one end of the rim platform 13. The spokes 2 are aluminum alloy castings, and a first platform 21 and a second platform 22 are provided on one side of the spokes 2. The first platform 21 and the second platform 22 are spaced apart in the radial direction. One end of the first platform 21 is fixed to the groove bottom wall 11, and one end of the second platform 22 is fixed to the other end of the rim platform 13. The inclined wall 12, the rim platform 13, the second platform 22, the portion of the rim 1 between the second platform 22 and the first platform 21, and the first platform 21 together define an annular cavity 4. The quarter-wavelength tube sound-absorbing assembly 3 is disposed in the annular cavity 4 to suppress tire cavity resonance noise.

[0045] Specifically, such as Figure 1 and Figure 2 As shown, the rim 1 is an aluminum alloy plastic forming part, which is precise and convenient to process, low in cost and light in weight. At the same time, the rim 1 needs to have a certain rigidity to ensure the overall rigidity of the wheel. The rim 1 includes a groove bottom wall 11, an inclined wall 12 and a rim platform 13. One end of the groove bottom wall 11 is connected to one end of the inclined wall 12, and the other end of the inclined wall 12 is connected to one end of the rim platform 13.

[0046] The spokes 2 are made of cast aluminum alloy, which is precise, easy to process, and low in cost. One side of the spokes 2 has a first platform 21 and a second platform 22, with a radial gap between them. One end of the first platform 21 is fixed to the bottom wall 11 of the groove, and one end of the second platform 22 is fixed to the other end of the rim platform 13. The inclined wall 12, the rim platform 13, the second platform 22, the portion of the rim 1 between the second platform 22 and the first platform 21, and the first platform 21 together define the annular cavity 4. It can be understood that the rim 1 is integrally plastically formed from an aluminum alloy plate, and the spokes 2 are integrally cast from aluminum alloy. The first platform 21 and the bottom wall 11 can be welded together using friction stir welding, and the second platform 22 can be welded to the other end of the rim platform 13, thus welding the rim 1 and spokes 2 together and defining the annular cavity 4. This effectively reduces the weight of the wheel and defines the annular cavity 4, facilitating the placement of the quarter-wavelength tube sound-absorbing assembly 3. Furthermore, the shape of the annular cavity 4 can be designed according to actual conditions.

[0047] A quarter-wavelength tube sound-absorbing assembly 3 is installed in the annular cavity 4 to suppress tire cavity resonance noise. Understandably, since the annular cavity 4 is a circumferentially open cavity, a plastic circular flexible tube can be used for the quarter-wavelength tube sound-absorbing assembly 3, thus ensuring its airtightness, reducing cost, decreasing wheel weight, and ensuring wheel dynamic balance. When resonance occurs in the tire cavity, a first-order standing wave sound field is formed within the cavity. The sound wave propagation speed may change with different vehicle speeds, resulting in different resonance frequencies. However, the sound wave wavelength is equal to the circumference of the center of the tire cavity cross-section. Therefore, the quarter-wavelength tube sound-absorbing assembly 3 can... It suppresses tire cavity resonance noise under different working conditions and has good universality. Before the rim 1 and spoke 2 are fixedly installed, the quarter-wavelength tube sound absorption assembly 3 is pre-placed between the first platform 21 and the second platform 22. When the rim 1 and spoke 2 are welded and fixed, the inclined wall 12 of the rim 1 presses the quarter-wavelength tube sound absorption assembly 3 to achieve circumferential fixation of the quarter-wavelength tube sound absorption assembly 3. The quarter-wavelength tube sound absorption assembly 3 is directly installed in the annular cavity 4, avoiding the use of connectors or welding for installation, which can further reduce the weight of the wheel and has a good noise reduction effect.

[0048] According to an embodiment of the present invention, a lightweight noise-reducing wheel 1000 with an embedded acoustic structure is first placed between the first platform 21 and the second platform 22 of the spoke 2. Then, the bottom wall 11 of the groove of the rim 1 is fixed to one end of the first platform 21 of the spoke 2 by friction stir welding. The other end of the rim platform 13 of the rim 1 is fixed to one end of the second platform 22 by friction stir welding. The quarter-wavelength tube sound-absorbing assembly 3 is located in the annular cavity 4 defined by the inclined wall 12, the rim platform 13, the second platform 22, the part of the rim 1 between the second platform 22 and the first platform 21, and the first platform 21. The inclined wall 12 of the rim 1 presses the quarter-wavelength tube sound-absorbing assembly 3.

[0049] According to an embodiment of the present invention, the lightweight noise-reducing wheel 1000 with an embedded acoustic structure has a rim 1 integrally formed from an aluminum alloy plate and a spoke 2 integrally cast from an aluminum alloy plate. The rim 1 and spoke 2 are welded together by friction stir welding to define an annular cavity 4, thereby effectively reducing the weight of the wheel. The annular cavity 4 also facilitates the placement of the quarter-wavelength tube sound-absorbing assembly 3, avoiding the use of connectors or welding to install the quarter-wavelength tube sound-absorbing assembly 3, further reducing the wheel weight and achieving good noise reduction. In summary, the lightweight noise-reducing wheel 1000 with an embedded acoustic structure of the present invention can effectively reduce wheel weight, has good noise reduction effect, low cost, simple structure, convenient installation, and good versatility.

[0050] like Figures 3 to 5As shown, according to one embodiment of the present invention, the quarter-wavelength tube assembly includes an annular tube 31 and a partition 32. The partition 32 is disposed inside the annular tube 31 to divide the annular tube cavity 313 of the annular tube 31 into a plurality of independent sub-cavities 311 in the circumferential direction. The annular tube 31 is provided with a plurality of outwardly protruding through holes 312 that communicate with the plurality of sub-cavities 311 respectively. The inclined wall 12 of the rim 1 is provided with an opening 121 for the plurality of outwardly protruding through holes 312 to pass through respectively. The plurality of outwardly protruding through holes 312 communicate with the tire cavity through the opening 121. Understandably, the shape of the annular tube 31 matches that of the annular cavity 4. The annular tube 31 is fitted into the annular cavity 4. The cross-sections of the multiple sub-cavities 311 in the axial direction are all the same. The corresponding outward protruding through holes 312 on the multiple sub-cavities 311 pass through the opening 121 and communicate with the tire cavity. In this way, the incident sound waves in the tire cavity can be transmitted to the sub-cavities 311. The sound waves are reflected when they reach the baffle 32. The reflected sound waves return to the tire cavity. The sound waves with opposite phases at the same frequency can cancel each other out after superposition, so as to achieve the purpose of noise reduction. When the tire cavity resonates, a first-order standing wave sound field is formed in the tire cavity. The sound wave propagation speed may change with the different driving speeds of the car, resulting in different resonance frequencies. However, the wavelength of the sound wave is equal to the circumference of the center of the tire cavity cross-section. The length of the sub-cavity 311 is designed to be one-quarter of the circumference of the tire cavity, that is, a quarter-wavelength tube is used. In this way, the quarter-wavelength tube sound absorption assembly 3 can suppress the tire cavity resonance noise under different working conditions, and has good universality.

[0051] like Figure 3 and Figure 5As shown, according to a further embodiment of the present invention, the annular cavity 313 of the annular tube 31 is divided into an inner annular cavity 3131 and an outer annular cavity 3132 that are not connected to each other in the radial direction; the partitions 32 are an inner partition 321 and an outer partition 322; the inner annular cavity 3131 is divided into multiple independent inner sub-cavities 3112 in the circumferential direction by the inner partitions 321, and the outer annular cavity 3132 is divided into multiple independent inner sub-cavities 3112 in the circumferential direction by the outer partitions 322. The upper part is divided into multiple independent outer sub-cavities 3111, wherein the outer layer partition 322 and the inner layer partition 321 are staggered from each other in the circumferential direction; the outward protruding through hole 312 is divided into an inner outward protruding through hole 3121 that communicates with the inner sub-cavity 3112 and an outer outward protruding through hole 3122 that communicates with the outer sub-cavity 3111; the opening 121 is divided into an inner opening and an outer opening; the inner outward protruding through hole 3121 passes through the inner opening and communicates with the tire cavity, and the outer outward protruding through hole 3122 passes through the outer opening and communicates with the tire cavity. It is understandable that if the diameter of the opening 121 on the inclined wall 12 of the rim 1 is too large, it will reduce the strength of the rim 1. Therefore, it is necessary to limit the diameter of the opening 121 on the inclined wall 12 of the rim 1 within a reasonable range to ensure the strength of the rim 1. This is achieved by dividing the annular cavity 313 into an inner annular cavity 3131 and an outer annular cavity 3132. The inner annular cavity 3131 is provided with an inner outward protruding through hole 3121, and the outer annular cavity 313 is provided with an outer outward protruding through hole 3122. Therefore, the opening 121 on the inclined wall 12 of the rim 1 can be divided into an inner opening and an outer opening, which avoids the opening diameter of the opening 121 on the inclined wall 12 of the rim 1 being too large and ensures the strength of the rim 1; the outer layer partition 322 and the inner layer partition 321 are staggered from each other in the circumferential direction. For example, the outer layer partition 322 and the inner layer partition 321 are staggered by 45° in the circumferential direction. In this way, the strength of the rim 1 can be further guaranteed, while ensuring the noise reduction effect of the quarter-wavelength tube sound absorption assembly 3.

[0052] It should be noted that the annular cavity 313 can be a single-layer annular cavity 313, a double-layer annular cavity 313, or a multi-layer annular cavity 313.

[0053] like Figure 2 As shown, according to one embodiment of the present invention, the quarter-wavelength tube assembly is fixed to the wall of the annular cavity 4 by an adhesive layer 5. It can be understood that before the rim 1 and spokes 2 are fixedly installed, the quarter-wavelength tube sound-absorbing assembly 3 is pre-placed between the first platform 21 and the second platform 22 and fixed to the spokes 2 by the adhesive layer 5, so as to position and fix the quarter-wavelength tube sound-absorbing assembly 3, which facilitates the welding and installation of the rim 1 and the hub.

[0054] like Figure 2As shown, according to one embodiment of the present invention, one end of the first platform 21 is located on the inner circumferential surface of the bottom wall 11 of the groove. The first platform 21 is fixed to the bottom wall 11 of the groove by an axial weld 6, which is located between the first platform 21 and the inner circumferential surface of the bottom wall 11. It can be understood that when the rim 1 and the spoke 2 are fixedly installed, the inner circumferential surface of the bottom wall 11 is in contact with the first platform 21. The inner circumferential surface of the bottom wall 11 and the first platform 21 can be welded and fixed by friction stir welding to form the axial weld 6, which is a simple welding method.

[0055] like Figure 2 As shown, according to one embodiment of the present invention, one end of the second platform 22 is provided with a step 221, and the other end of the rim platform 13 is located on the step 221. The other end of the rim platform 13 is fixed to the step 221 by a radial weld 7. It can be understood that when the rim 1 and the spokes 2 are fixedly installed, by providing the step 221 at one end of the second platform 22, the other end of the rim platform 13 can be quickly positioned and placed on the step 221, which facilitates the positioning and installation of the rim 1 and the spokes 2. The other end of the rim platform 13 and the step 221 at one end of the second platform 22 can be welded and fixed by friction stir welding to form a radial weld 7, which is a simple welding method.

[0056] According to one embodiment of the present invention, the outer surface of the rim platform 13 in the radial direction is flush with the outer surface of the second platform 22 in the radial direction, which is a reasonable structure and facilitates tire installation.

[0057] According to some embodiments of the present invention, the rim platform 13 and the second platform 22 are fixedly connected to form the first bead seat of the wheel. It is understood that the first bead seat is used to hold the tire, and its structure is simple and reasonable.

[0058] According to some embodiments of the present invention, the rim 1 is a 6061 aluminum alloy plastic-formed part; the spokes 2 are A356 aluminum alloy castings. It is understood that the 6061 aluminum alloy plastic-formed part has good plastic forming performance and light weight, which can realize the lightweighting of the wheel; the A356 aluminum alloy casting has good casting performance, mature technology and low cost.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A lightweight noise-reducing wheel with an embedded acoustic structure, characterized in that, include: The wheel rim is a plastically formed aluminum alloy part. The wheel rim includes a groove bottom wall, an inclined wall, and a wheel rim platform. One end of the groove bottom wall is connected to one end of the inclined wall, and the other end of the inclined wall is connected to one end of the wheel rim platform. The spokes are aluminum alloy castings. One side of the spokes is provided with a first platform and a second platform, and there is a radial distance between the first platform and the second platform. One end of the first platform is fixed to the bottom wall of the groove, and one end of the second platform is fixed to the other end of the rim platform. The inclined wall, the rim platform, the second platform, the portion of the spokes between the second platform and the first platform, and the first platform together define an annular cavity. One end of the first platform is located on the inner circumferential surface of the bottom wall of the tank, and the first platform is fixed to the bottom wall of the tank by friction stir welding; One end of the second platform is provided with a step, and the other end of the rim platform is located on the step. The other end of the rim platform is fixed to the step by friction stir welding. A quarter-wavelength tube sound-absorbing assembly, wherein the quarter-wavelength tube sound-absorbing assembly is disposed in the annular cavity, for suppressing tire cavity resonance noise; The process involves first placing the quarter-wavelength tube sound-absorbing assembly between the first platform and the second platform of the wheel spoke, then fixing the bottom wall of the groove of the wheel rim to one end of the first platform of the wheel spoke by friction stir welding, and fixing the other end of the wheel rim platform to the step of the second platform by friction stir welding.

2. The lightweight noise-reducing wheel with an embedded acoustic structure according to claim 1, characterized in that, The quarter-wavelength tube sound-absorbing assembly includes a circular tube and a partition. The partition is disposed inside the circular tube and divides the circular tube cavity into multiple independent sub-cavities in the circumferential direction. The circular tube is provided with multiple protruding through holes that communicate with the multiple sub-cavities respectively. The inclined wall of the rim is provided with an opening for the multiple protruding through holes to pass through. The multiple protruding through holes communicate with the tire cavity through the openings.

3. The lightweight noise-reducing wheel with an embedded acoustic structure according to claim 2, characterized in that, The annular tube is divided into an inner annular tube and an outer annular tube, which are not connected to each other, in the radial direction. The partitions are an inner partition and an outer partition. The inner annular tube is divided into multiple independent inner sub-cavities in the circumferential direction by the inner partitions. The outer annular tube is divided into multiple independent outer sub-cavities in the circumferential direction by the outer partitions. The outer partitions are offset from the inner partitions in the circumferential direction. The outward protruding through holes are divided into an inner outward protruding through hole that communicates with the inner sub-cavities and an outer outward protruding through hole that communicates with the outer sub-cavities. The openings are divided into an inner opening and an outer opening. The inner outward protruding through hole communicates with the tire cavity through the inner opening. The outer outward protruding through hole communicates with the tire cavity through the outer opening.

4. The lightweight noise-reducing wheel with an embedded acoustic structure according to claim 1, characterized in that, The quarter-wavelength tube sound-absorbing assembly is fixed to the wall of the annular cavity by an adhesive layer.

5. The lightweight noise-reducing wheel with an embedded acoustic structure according to claim 1, characterized in that, The outer surface of the rim platform in the radial direction is flush with the outer surface of the second platform in the radial direction.

6. The lightweight noise-reducing wheel with an embedded acoustic structure according to any one of claims 1-5, characterized in that, The rim platform and the second platform are fixedly connected to form the first bead seat of the wheel.

7. The lightweight noise-reducing wheel with an embedded acoustic structure according to any one of claims 1-5, characterized in that, The rim is a 6061 aluminum alloy plastic-formed part; the spokes are A356 aluminum alloy castings.

Images