Vehicle thin-wall aluminum alloy structure capable of reducing noise in multiple layers
Through multi-layer structural design, foam aluminum layers with specific pore sizes and polyurethane sound-absorbing materials, the problem of noise reduction methods in existing technologies weakening the strength of the vehicle body is solved, and the lightweighting of the vehicle's thin-walled aluminum alloy structure and the improvement of noise reduction performance are achieved.
Patent Information
- Application Number
- CN202422792949.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-11-15
AI Technical Summary
The existing method of reducing noise by designing cavities in thin-walled aluminum alloy structures of vehicles and filling them with elastic sound-absorbing materials is effective but also weakens the strength of the vehicle body structure.
It adopts a multi-layer structural design, including an aluminum alloy vehicle wall outer layer, the first and second elastic sound-absorbing layers, a sound-absorbing reinforcement component and an aluminum alloy vehicle wall inner layer. It utilizes a foam aluminum layer and a pore structure with a specific pore size, combined with polyurethane sound-absorbing material, to enhance structural strength and improve sound absorption performance.
It achieves a dual improvement in the lightweight and noise reduction performance of the vehicle's thin-walled aluminum alloy structure, while enhancing the structural strength and simplifying the assembly and maintenance process.
Smart Images
Figure CN223315096U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle thin-wall structures, in particular to a vehicle thin-wall aluminum alloy structure capable of multi-layer noise reduction. Background Art
[0002] Thin-walled aluminum alloy vehicle structures refer to a lightweight material technology used in vehicle manufacturing. By using aluminum alloy materials to manufacture vehicle body structural parts, thin-walled, hollow, and integrated designs are achieved. This structure features low density, good formability, excellent mechanical properties, and environmental friendliness. It can effectively reduce vehicle weight, lower fuel consumption, and increase driving range, while maintaining or improving vehicle strength and rigidity.
[0003] The vehicle's thin-walled aluminum alloy structure with multi-layer noise reduction is a vehicle structural design that combines lightweighting and noise reduction performance. This structure uses a combination of multiple layers of materials to effectively reduce vehicle interior noise, and the multi-layer panel design significantly improves the noise reduction effect.
[0004] To reduce the noise generated by thin-walled aluminum alloy structures in vehicles, the current technical solution is to design cavities in the aluminum alloy structure and fill these cavities with elastic sound-absorbing materials. Although this method can effectively reduce noise, it also weakens the strength of the vehicle body structure. Therefore, to address the above problem, a thin-walled aluminum alloy structure for vehicles with multi-layer noise reduction is proposed. Utility Model Content
[0005] The purpose of the present utility model is to provide a thin-walled aluminum alloy structure for vehicles with multi-layer noise reduction, so as to solve the problem of designing cavities in the aluminum alloy structure and filling these cavities with elastic sound-absorbing materials. Although this method can effectively reduce noise, it also weakens the strength of the vehicle body structure.
[0006] To achieve the above objectives, the present invention provides the following technical solutions:
[0007] A thin-walled aluminum alloy structure for a vehicle capable of multi-layer noise reduction includes an outer layer of an aluminum alloy vehicle wall and a first elastic sound-absorbing layer. The bottom end of the outer layer of the aluminum alloy vehicle wall is bonded to the top end of the first elastic sound-absorbing layer. The bottom end of the first elastic sound-absorbing layer is bonded to the top end of a sound-absorbing enhancement component. The bottom end of the sound-absorbing enhancement component is bonded to the top end of a second elastic sound-absorbing layer. The bottom end of the second elastic sound-absorbing layer is bonded to the top end of an inner layer of the aluminum alloy vehicle wall. The sound-absorbing enhancement component includes a foam aluminum layer. A sound-reducing hole is opened on the inner side of the foam aluminum layer. The foam aluminum layer is provided with a sound-reducing hole. An arc-shaped groove is provided on the inner side of the aluminum layer, and external through grooves are provided on the upper and lower ends of the foam aluminum layer. An aluminum alloy arc plate is fixedly connected to the inner side of the arc-shaped groove of the foam aluminum layer. Double fixed columns are fixedly connected to the top and bottom ends of the aluminum alloy arc plate. A metal spring block is fixedly connected to one side of the double fixed column. A circular groove is provided on the inner side of the metal spring block. The inner layer of the aluminum alloy vehicle wall includes an aluminum alloy thin plate, and a tapered hole is provided on the inner side of the aluminum alloy thin plate. A straight hole is provided through the upper end of the aluminum alloy thin plate near the tapered hole.
[0008] As a further optimization of this utility model, the internal structure of the outer layer of the aluminum alloy vehicle wall is the same as that of the aluminum alloy thin plate, and the inner layer of the outer layer of the aluminum alloy vehicle wall also has tapered holes and straight holes, and the straight holes inside the outer layer of the aluminum alloy vehicle wall pass through the lower end of the outer layer of the aluminum alloy vehicle wall.
[0009] As a further optimized content of the present invention, wherein: the inner side of the first elastic sound absorbing layer is provided with a straight hole, the opening shape of the straight hole is a cylinder, and the straight hole passes through the inner side of the first elastic sound absorbing layer.
[0010] As a further optimization of the present invention, the inner sides of the flush holes of the first elastic sound-absorbing layer fit in with the inner sides of the double solid columns at the upper end, and the number of the flush holes is the same as the number of the double solid columns at the upper end.
[0011] As a further optimization of the present invention, the internal structure of the second elastic sound absorbing layer is the same as that of the first elastic sound absorbing layer, the flush holes opened in the second elastic sound absorbing layer are fitted with the inner sides of the double solid columns at the lower end, and a distance is provided between the second elastic sound absorbing layer and the first elastic sound absorbing layer.
[0012] As a further optimization of the present invention, the tapered hole is formed in a cone-shaped shape, the straight hole is formed in a cylinder-shaped shape, the top of the aluminum alloy sheet is fitted with the bottom of the second elastic sound-absorbing layer, the metal spring block at the lower end is engaged with the inside of the tapered hole, the double solid column portion at the lower end is located inside the straight hole, and the bottom end of the metal spring block at the lower end is fitted with the bottom end of the tapered hole.
[0013] As a further optimization of the present invention, the top of the foam aluminum layer is in contact with the bottom of the first elastic sound-absorbing layer, the bottom of the foam aluminum layer is in contact with the top of the second elastic sound-absorbing layer, the middle end of the aluminum alloy arc plate is in the shape of an arc body, the number of the aluminum alloy arc plates corresponds one to one to the number of the arc grooves, and the double solid column part is located inside the outer through groove.
[0014] Compared with the prior art, the beneficial effects of the present invention are:
[0015] In the present invention, by providing a second elastic sound-absorbing layer, a sound-absorbing enhancement component and an inner layer of an aluminum alloy vehicle wall, the device achieves a dual improvement in the lightweight and noise reduction performance of the vehicle's thin-walled aluminum alloy structure. By using foamed aluminum material and a pore structure with a specific pore size range, not only the sound absorption performance is improved, but also the structural strength is enhanced. At the same time, the use of polyurethane sound-absorbing material further reduces noise, and the unique installation method simplifies the assembly process, facilitates subsequent maintenance and replacement, and ensures an improvement in the overall performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the sound absorption enhancement component of the utility model;
[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the structure at A;
[0019] Figure 4 This is a schematic diagram of the structure of the first elastic sound-absorbing layer of the utility model;
[0020] Figure 5 This is a schematic diagram of the structure of the foam aluminum layer of the utility model;
[0021] Figure 6 This is a schematic diagram of the aluminum alloy arc plate structure of the utility model.
[0022] In the figure: 1. Aluminum alloy outer layer; 2. First elastic sound absorbing layer;
[0023] 3. Sound absorption enhancement component; 31. Aluminum foam layer; 32. Sound reduction hole; 33. Arc groove; 34. External through groove; 35. Aluminum alloy arc plate; 36. Double fixed column; 37. Metal spring block; 38. Circular groove;
[0024] 4. Second elastic sound absorbing layer;
[0025] 5. Aluminum alloy car wall inner layer; 51. Aluminum alloy sheet; 52. Tapered hole; 53. Straight hole;
[0026] 6. Qi Kong. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.
[0029] See also Figure 1-6 , the utility model provides a technical solution:
[0030] A thin-walled aluminum alloy structure for a vehicle with multi-layer noise reduction includes an aluminum alloy vehicle wall outer layer 1 and a first elastic sound-absorbing layer 2. The bottom end of the aluminum alloy vehicle wall outer layer 1 is bonded to the top end of the first elastic sound-absorbing layer 2. The bottom end of the first elastic sound-absorbing layer 2 is bonded to the top end of a sound-absorbing enhancement component 3. The bottom end of the sound-absorbing enhancement component 3 is bonded to the top end of a second elastic sound-absorbing layer 4. The bottom end of the second elastic sound-absorbing layer 4 is bonded to the top end of an aluminum alloy vehicle wall inner layer 5. The sound-absorbing enhancement component 3 includes a foam aluminum layer 31. A sound-reducing hole 32 is opened inside the foam aluminum layer 31. An arc is opened inside the foam aluminum layer 31. shaped groove 33, the upper and lower ends of the foam aluminum layer 31 are provided with external through grooves 34, the inner side of the arc-shaped groove 33 provided in the foam aluminum layer 31 is fixedly connected with an aluminum alloy arc plate 35, the top and bottom ends of the aluminum alloy arc plate 35 are fixedly connected with double fixed columns 36, one side of the double fixed column 36 is fixedly connected with a metal spring block 37, and the inner side of the metal spring block 37 is provided with a circular groove 38, the inner layer 5 of the aluminum alloy vehicle wall includes an aluminum alloy thin plate 51, the inner side of the aluminum alloy thin plate 51 is provided with a tapered hole 52, and the upper end of the aluminum alloy thin plate 51 near the tapered hole 52 is provided with a straight hole 53.
[0031] As a further implementation of this solution, the internal structure of the aluminum alloy vehicle wall outer layer 1 is the same as that of the aluminum alloy thin plate 51. The aluminum alloy vehicle wall outer layer 1 also has a tapered hole 52 and a straight hole 53. The straight hole 53 inside the aluminum alloy vehicle wall outer layer 1 passes through the lower end of the aluminum alloy vehicle wall outer layer 1, facilitating the fixed connection between the aluminum alloy vehicle wall outer layer 1 and the aluminum alloy vehicle wall inner layer 5 via the sound absorption enhancement component 3.
[0032] As a further implementation of the present invention, a straight hole 6 is provided on the inner side of the first elastic sound absorbing layer 2. The straight hole 6 is in the shape of a cylinder and passes through the inner side of the first elastic sound absorbing layer 2. The inner sides of the straight holes 6 provided in the first elastic sound absorbing layer 2 are fitted with the inner sides of the double fixing columns 36 at the upper end. The number of the straight holes 6 is the same as the number of the double fixing columns 36 at the upper end. The internal structure of the second elastic sound absorbing layer 4 is the same as that of the first elastic sound absorbing layer 2. The straight holes 6 provided in the second elastic sound absorbing layer 4 are fitted with the inner sides of the double fixing columns 36 at the lower end. A spacing is provided between the second elastic sound absorbing layer 4 and the first elastic sound absorbing layer 2 to facilitate the double fixing columns 36 at the upper end to pass through the straight holes 6 of the first elastic sound absorbing layer 2, thereby improving the stability of the first elastic sound absorbing layer 2. The double fixing columns 36 at the lower end can pass through the straight holes 6 inside the second elastic sound absorbing layer 4, thereby improving the stability of the second elastic sound absorbing layer 4 after installation, and providing better noise reduction performance through the first elastic sound absorbing layer 2 and the second elastic sound absorbing layer 4.
[0033] As a further implementation of this solution, the tapered hole 52 is formed into a cone, and the straight hole 53 is formed into a cylinder. The top of the aluminum alloy sheet 51 is bonded to the bottom of the second elastic sound-absorbing layer 4, and the lower metal spring block 37 is engaged with the interior of the tapered hole 52. The lower double fixing column 36 is partially located within the straight hole 53, and the bottom end of the lower metal spring block 37 is bonded with the bottom end of the tapered hole 52. The combined structural design of the cone and cylinder improves the tightness and stability of the connection. At the same time, the bonding design enhances the impact resistance of the structure, ensuring long-term operational reliability.
[0034] As a further implementation of this solution, the top of the foam aluminum layer 31 is bonded to the bottom of the first elastic sound-absorbing layer 2, and the bottom of the foam aluminum layer 31 is bonded to the top of the second elastic sound-absorbing layer 4. The middle end of the aluminum alloy arc plate 35 is in the shape of an arc body. The number of aluminum alloy arc plates 35 corresponds one to one to the number of arc grooves 33. The double solid columns 36 are partially located inside the outer through groove 34. The foam aluminum layer 31 can increase the strength of the overall structure. The foam aluminum layer 31 can improve the absorption performance of the sound wave frequency range through the setting of the sound reduction hole 32, while reducing the overall mass of the structure, which contributes to the overall weight reduction design of the vehicle.
[0035] Workflow: When ensuring the noise reduction effect of the thin-walled aluminum alloy of the vehicle and the strength of the thin-walled aluminum alloy structure, the installation is carried out first. The fixation between the foam aluminum layer 31 and the aluminum alloy arc plate 35 is prefabricated in advance. The aluminum alloy arc plate 35 is evenly fixed inside the arc groove 33. At the same time, the installation directions of the aluminum alloy arc plates 35 in the same row are opposite and alternate. The setting vectors of the aluminum alloy arc plates 35 and the arc groove 33 are several rows and columns. This installation method can improve the strength of the foam aluminum layer 31. The double solid columns 36 and the metal spring blocks 37 at the upper and lower ends protrude from the upper and lower ends of the foam aluminum layer 31 respectively, which is convenient for later installation and fixation. The second elastic sound-absorbing layer 4 The sound absorption enhancement component 3 is laid flat on the upper part of the inner layer 5 of the aluminum alloy vehicle wall, and the parallel holes 6 opened in the second elastic sound absorbing layer 4 are aligned with the straight holes 53 respectively. The sound absorption enhancement component 3 is placed on the second elastic sound absorbing layer 4 as a whole, so that the metal spring block 37 at the lower end of the sound absorption enhancement component 3 is aligned with the parallel holes 6 opened in the second elastic sound absorbing layer 4. The foam aluminum layer 31 is pressed downward as a whole. During the pressing process, the metal spring block 37 at the lower end is deformed. The zigzag groove 38 reserves space for the metal spring block 37 to move when it is deformed. The metal spring block 37 gradually enters the interior of the tapered hole 52 through the parallel holes 6 and the straight hole 53 of the second elastic sound absorbing layer 4. When the metal spring block 37 enters the interior of the tapered hole 52, the metal spring block 37 Under the action of the zigzag shape, the horizontal outer side of the metal spring block 37 is fitted with the horizontal inner side of the tapered hole 52, and at the same time, the bottom end of the metal spring block 37 is fitted with the bottom end of the tapered hole 52. The outer layer 1 of the aluminum alloy vehicle wall and the first elastic sound-absorbing layer 2 are fixed to the sound-absorbing enhancement component 3 according to the above principle. This installation method can reduce the difficulty of assembly and facilitate later maintenance or replacement. According to the shape and arrangement of the aluminum alloy arc plate 35, the aluminum alloy arc plate 35 has strong compressive and impact resistance, thereby improving the structural strength of the vehicle's thin-walled aluminum alloy. The material of the foam aluminum layer 31 is foam aluminum, and the aperture size of the sound-reducing hole 32 inside the foam aluminum layer 31 directly affects its sound wave frequency range. Absorption performance, the smaller the hole, the greater the sound absorption capacity, the aperture of the sound reduction hole 32 is between 0.5-1.0mm, and the porosity is 70-90%. The sound reduction hole 32 improves the sound absorption performance of the foam aluminum layer 31. At the same time, the foam aluminum layer 31 can increase the strength of the overall structure. The second elastic sound absorption layer 4 and the first elastic sound absorption layer 2 are made of polyurethane sound absorption material. The first elastic sound absorption layer 2 and the second elastic sound absorption layer 4 have a high sound absorption coefficient and reduce the overall mass of the structure, which contributes to the overall weight reduction design of the vehicle. In summary, the device has good noise reduction performance without weakening the strength of the vehicle body structure. Moreover, the device is also relatively convenient to assemble, which provides convenience for later maintenance.
[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A multi-layered, thin-walled aluminum alloy structure for a vehicle capable of reducing noise, comprising an aluminum alloy vehicle wall outer layer (1) and a first elastic sound-absorbing layer (2), characterized in that: The bottom end of the outer layer (1) of the aluminum alloy vehicle wall is bonded to the top end of the first elastic sound absorbing layer (2), the bottom end of the first elastic sound absorbing layer (2) is bonded to the top end of the sound absorbing enhancement component (3), the bottom end of the sound absorbing enhancement component (3) is bonded to the top end of the second elastic sound absorbing layer (4), the bottom end of the second elastic sound absorbing layer (4) is bonded to the top end of the inner layer (5) of the aluminum alloy vehicle wall, the sound absorbing enhancement component (3) comprises a foam aluminum layer (31), a sound reduction hole (32) is provided on the inner side of the foam aluminum layer (31), an arc-shaped groove (33) is provided on the inner side of the foam aluminum layer (31), and the upper and lower ends of the foam aluminum layer (31) are both open. An outer through groove (34) is provided, and an aluminum alloy arc plate (35) is fixedly connected to the inner side of the arc groove (33) provided on the foam aluminum layer (31), and a double fixed column (36) is fixedly connected to the top and bottom ends of the aluminum alloy arc plate (35), and a metal spring block (37) is fixedly connected to one side of the double fixed column (36), and a circular groove (38) is provided on the inner side of the metal spring block (37). The inner layer (5) of the aluminum alloy vehicle wall includes an aluminum alloy thin plate (51), and a tapered hole (52) is provided on the inner side of the aluminum alloy thin plate (51), and a straight hole (53) is provided through the upper end of the aluminum alloy thin plate (51) near the tapered hole (52).
2. The multi-layered thin-walled aluminum alloy structure for vehicles capable of noise reduction according to claim 1, characterized in that: The internal structure of the aluminum alloy vehicle wall outer layer (1) is the same as that of the aluminum alloy thin plate (51), and the aluminum alloy vehicle wall outer layer (1) also has a tapered hole (52) and a straight hole (53). The straight hole (53) inside the aluminum alloy vehicle wall outer layer (1) passes through the lower end of the aluminum alloy vehicle wall outer layer (1).
3. The multi-layered thin-walled aluminum alloy structure for vehicles capable of noise reduction according to claim 1, characterized in that: A flush hole (6) is provided on the inner side of the first elastic sound absorbing layer (2); the flush hole (6) is cylindrical in shape, and the flush hole (6) passes through the inner side of the first elastic sound absorbing layer (2).
4. The multi-layered thin-walled aluminum alloy structure for vehicles capable of noise reduction according to claim 1, characterized in that: The inner sides of the flush holes (6) formed in the first elastic sound-absorbing layer (2) are fitted with the inner sides of the double solid columns (36) at the upper end, and the number of the flush holes (6) is the same as the number of the double solid columns (36) at the upper end.
5. The multi-layered thin-walled aluminum alloy structure for vehicles capable of noise reduction according to claim 1, characterized in that: The internal structure of the second elastic sound absorbing layer (4) is the same as that of the first elastic sound absorbing layer (2); the flush holes (6) provided in the second elastic sound absorbing layer (4) are fitted with the inner sides of the double fixed columns (36) at the lower end; and a distance is provided between the second elastic sound absorbing layer (4) and the first elastic sound absorbing layer (2).
6. The multi-layered thin-walled aluminum alloy structure for vehicles capable of noise reduction according to claim 1, characterized in that: The tapered hole (52) is formed in a cone-shaped shape, and the straight hole (53) is formed in a cylindrical shape. The top end of the aluminum alloy sheet (51) is fitted with the bottom end of the second elastic sound-absorbing layer (4). The metal spring block (37) at the lower end is engaged with the interior of the tapered hole (52). The double-fixed column (36) at the lower end is partially located within the straight hole (53). The bottom end of the metal spring block (37) at the lower end is fitted with the bottom end of the tapered hole (52).
7. The multi-layered thin-walled aluminum alloy structure for vehicles capable of noise reduction according to claim 1, characterized in that: The top end of the foam aluminum layer (31) is bonded to the bottom end of the first elastic sound absorbing layer (2), and the bottom end of the foam aluminum layer (31) is bonded to the top end of the second elastic sound absorbing layer (4). The middle end of the aluminum alloy arc plate (35) is in the shape of an arc body. The number of the aluminum alloy arc plates (35) corresponds to the number of the arc grooves (33). The double solid columns (36) are partially located inside the outer through groove (34).