Vibration reducing structure for bass loudspeaker of vehicle door

Abstract

The utility model provides a vehicle door bass loudspeaker vibration reduction structure, which comprises a vibration reduction part, the vibration reduction part is used for reducing vibration noise of a vehicle door bass loudspeaker, the vibration reduction part is arranged at the rear end of the vehicle door bass loudspeaker, the vibration reduction part is integrally circular, the vibration reduction part and the vehicle door bass loudspeaker are coaxially arranged, and the vibration reduction part is used for reducing the vibration noise of the vehicle door bass loudspeaker. And the diameter of the vibration reducing part is smaller than the inner diameter of the rear end of the vehicle door woofer, so that an annular gap is formed between the edge of the vibration reducing part and the inner side edge of the rear end of the vehicle door woofer. According to the vehicle door bass loudspeaker vibration reduction structure provided by the utility model, through the elaborately designed vibration reduction piece, the arc-shaped reflecting plate and the connecting assembly thereof, and reasonable material selection and structure optimization, remarkable vibration and noise reduction effects are realized, the NVH (Noise Vibration and Harshness) performance of a vehicle is improved, and the service life of the vehicle is prolonged. And a quiet and comfortable riding environment is provided for a driver and passengers.

Description

Technical Field

[0001] This utility model relates to the field of automotive audio technology, specifically to a vibration reduction structure for a car door subwoofer. Background Technology

[0002] In existing car audio systems, speakers generate rearward-vibrating sound waves during operation. These sound waves can cause resonance in the outermost sheet metal of the vehicle's door panels, thus increasing NVH (noise, vibration, and harshness) noise both inside and outside the vehicle. This phenomenon is particularly pronounced in low-frequency speakers because low-frequency sound waves have higher energy and are more prone to causing structural resonance. Currently, solutions on the market often have limited effectiveness and cannot effectively reduce the vibration and noise caused by speakers.

[0003] To address this, a vibration reduction structure for car door subwoofers is proposed. Utility Model Content

[0004] The present invention aims to solve the problems mentioned in the background art by providing a vibration reduction structure for a car door subwoofer.

[0005] The specific technical solution is as follows:

[0006] A vibration reduction structure for a car door subwoofer includes: a vibration reduction component, which is used to reduce the vibration noise of the car door subwoofer, and the vibration reduction component is installed at the rear end of the car door subwoofer. The vibration reduction component is generally circular and is coaxially arranged with the car door subwoofer. The diameter of the vibration reduction component is smaller than the inner diameter of the rear end of the car door subwoofer, so that an annular gap is formed between the edge of the vibration reduction component and the inner edge of the rear end of the car door subwoofer.

[0007] As a preferred embodiment of this utility model, the rear end of the vibration reduction member protrudes from the inner side of the rear end of the car door subwoofer.

[0008] As a preferred embodiment of this utility model, the vibration reduction component includes an arc-shaped reflector. The arc-shaped reflector is installed at the rear end of the door subwoofer via a connecting assembly, and the convex arc surface of the arc-shaped reflector faces the front end of the door subwoofer. Under the action of the arc-shaped reflector, the sound waves generated by the door subwoofer when it is working are reflected to a 65-75 degree direction and emitted towards the outer door panel, which can effectively reduce the vibration of the door caused by the operation of the door subwoofer, improve the NVH performance of the vehicle, and enhance the driving and riding experience.

[0009] As a preferred embodiment of this utility model, the arc-shaped reflector is made of a lightweight, high-strength material, which includes, but is not limited to, aluminum alloy or high-temperature plastic composite material, in order to reduce weight and improve durability.

[0010] As a preferred embodiment of this utility model, the connecting assembly includes a circular connecting seat and a mounting seat. The circular connecting seat is integrally disposed at the middle position of the arc-shaped reflector, and the mounting seat is fixedly installed inside the rear end of the car door subwoofer. The mounting seat is fixedly connected to the circular connecting seat by screws.

[0011] As a preferred embodiment of this utility model, the edge of the circular connecting seat is integrally formed with a plurality of mounting holes arranged in a circumferential and equal angle. The mounting seat is provided with threaded holes. The screw shank passes through the mounting holes and is screwed into the threaded holes on the mounting seat, thereby fixing the circular connecting seat on the mounting seat, and thus fixing the arc-shaped reflector to the rear end of the car door subwoofer.

[0012] As a preferred embodiment of this utility model, a plurality of reinforcing ribs are integrally provided between the outer side of the circular connecting seat and the concave arc surface of the arc-shaped reflector, and the plurality of reinforcing ribs are arranged in a circumferential and equidistant manner around the circular connecting seat.

[0013] As a preferred embodiment of this utility model, the shape design of the arc-shaped reflector is based on the following wave equation:

[0014]

[0015] Where u(x,y,z,t) represents the sound wave displacement at position (x,y,z) and time t, and c is the sound wave propagation speed in the medium. By solving this equation and combining it with the parameters of the car door subwoofer, the optimal curvature and size of the arc-shaped reflector can be determined to achieve the best sound wave reflection effect and vibration reduction.

[0016] As a preferred embodiment of this utility model, the edge shape design of the arc-shaped reflector is optimized using the following diffraction equation:

[0017]

[0018] Where Iθ is the sound wave intensity at a diffraction angle of θ, I0 is the sound wave intensity without diffraction, and a is the radius or related dimensional parameter of the arc-shaped reflector. This equation is used to optimize the edge shape of the arc-shaped reflector to reduce energy loss caused by sound wave diffraction and enhance sound wave reflection in a set direction.

[0019] As a preferred embodiment of this utility model, when the car door subwoofer is installed on the inner door panel, the arc-shaped reflector is located between the inner door panel and the outer door panel.

[0020] This utility model has the following beneficial effects:

[0021] The vibration reduction structure for the car door subwoofer provided by this utility model achieves significant vibration reduction and noise reduction effects through carefully designed vibration reduction components, arc-shaped reflectors and their connecting components, as well as reasonable material selection and structural optimization, thereby improving the NVH performance of the vehicle and providing a quieter and more comfortable riding environment for the driver and passengers. Attached Figure Description

[0022] Figure 1 Schematic diagram of the application of the vibration reduction structure for the car door subwoofer provided in this embodiment of the utility model Figure 1 ;

[0023] Figure 2 Schematic diagram of the application of the vibration reduction structure for the car door subwoofer provided in this embodiment of the utility model Figure 2 ;

[0024] Figure 3 A cross-sectional view of the application of the vibration reduction structure for a car door subwoofer provided in an embodiment of this utility model;

[0025] Figure 4 An exploded view of the application of the vibration reduction structure for a car door subwoofer provided in this embodiment of the utility model;

[0026] Figure 5 for Figure 4 Enlarged structural diagram at point A;

[0027] Figure 6 A schematic diagram of the vibration reduction structure for a car door subwoofer provided in an embodiment of this utility model;

[0028] Figure 7 A schematic plan view of the application of the vibration reduction structure for a car door subwoofer provided in an embodiment of this utility model;

[0029] Figure 8 A schematic diagram showing the sound wave direction of a car door subwoofer when it is operating without vibration damping components installed.

[0030] Figure 9 A schematic diagram showing the sound wave direction when the subwoofer in the car door is working after the vibration damping device is installed.

[0031] In the attached image:

[0032] 1. Vibration reduction component; 101. Arc-shaped reflector; 102. Circular connecting seat; 103. Mounting hole; 104. Reinforcing rib; 105. Screw; 2. Door subwoofer; 201. Mounting bracket. Detailed Implementation

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0035] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Example

[0038] The vibration reduction structure for the car door subwoofer provided in this embodiment, such as Figures 1-9As shown, the system includes a vibration damping component 1, which reduces the vibration noise of the door subwoofer 2. The vibration damping component 1 is installed at the rear end of the door subwoofer 2. The vibration damping component 1 is generally circular and coaxially arranged with the door subwoofer 2. The diameter of the vibration damping component 1 is smaller than the inner diameter of the rear end of the door subwoofer 2, creating an annular gap between the edge of the vibration damping component 1 and the inner edge of the rear end of the door subwoofer 2. The circular shape and coaxial arrangement of the vibration damping component 1 ensure structural consistency and stability. Because the diameter of the vibration damping component 1 is smaller than the inner diameter of the rear end of the door subwoofer 2, the annular gap between them acts as a sound wave dissipation channel, effectively dispersing and guiding sound waves, reducing the vibration energy directly acting on the outermost sheet metal of the door panel, thereby significantly reducing NVH noise.

[0039] In addition, the presence of the annular gap not only helps the sound waves to dissipate, but also prevents the sound waves from directly impacting the internal structure of the door, further improving the acoustic performance.

[0040] Specifically, in this embodiment, the rear end of the vibration damping member 1 protrudes from the inner rear end of the door subwoofer 2. This design increases the travel distance of the sound wave before reflection, allowing the arc-shaped reflector 101 to more fully change the direction of the sound wave and improve the reflection efficiency. The protruding design also increases the contact area between the vibration damping member 1 and the door subwoofer 2, enhancing the rigidity and stability of the structure and helping to better absorb and disperse vibration.

[0041] Specifically, in this embodiment, the vibration reduction component 1 includes an arc-shaped reflector 101. The arc-shaped reflector 101 is installed at the rear end of the door subwoofer 2 via a connecting assembly, and the convex arc surface of the arc-shaped reflector 101 is positioned facing the front end of the door subwoofer 2. Under the action of the arc-shaped reflector 101, the sound waves generated when the door subwoofer 2 is working are reflected to a 65-75 degree direction and emitted towards the outer door panel, which can effectively reduce the vibration of the door caused by the operation of the door subwoofer 2, improve the NVH performance of the vehicle, and enhance the driving and riding experience. The arc-shaped reflector 101 is made of lightweight and high-strength materials, including but not limited to aluminum alloy or high-temperature plastic composite materials, to reduce weight and improve durability.

[0042] The above solution has the following technical effects:

[0043] Precise control of sound wave direction: The convex arc surface of the arc-shaped reflector 101 faces the front end of the subwoofer 2 in the car door. This design allows the sound waves generated when the speaker is working to be precisely reflected in a direction of 65-75 degrees. In this embodiment, a direction of approximately 70 degrees is preferred, radiating towards the outer door panel. This angle selection is based on in-depth research into the characteristics of sound wave propagation, which can minimize door vibration without sacrificing sound quality, thereby improving the vehicle's NVH performance.

[0044] Optimized material selection: The arc-shaped reflector 101, made of lightweight, high-strength materials (such as aluminum alloy or high-temperature plastic composite materials), ensures sufficient strength and durability while reducing weight, without affecting the overall structure of the door and ease of installation.

[0045] Specifically, in this embodiment, the connecting assembly includes a circular connecting seat 102 and a mounting seat 201. The circular connecting seat 102 is integrally disposed at the middle position of the arc-shaped reflector 101. The mounting seat 201 is fixedly installed inside the rear end of the car door subwoofer 2. The mounting seat 201 is fixedly connected to the circular connecting seat 102 by screws 105. The edge of the circular connecting seat 102 is integrally formed with a plurality of mounting holes 103 arranged in a circumferential and equidistant manner. The mounting seat 201 is provided with threaded holes. The screw 105 passes through the mounting holes 103 and is screwed into the threaded holes on the mounting seat 201, thereby fixing the circular connecting seat 102 on the mounting seat 201, thereby fixing the arc-shaped reflector 101 to the rear end of the car door subwoofer 2.

[0046] By combining the circular connector 102 and the mounting base 201, the arc-shaped reflector 101 is fixed to the rear end of the subwoofer 2 in the car door using screws 105. This connection method is simple, reliable, easy to install and maintain, and also ensures the stability of the reflector. The multiple mounting holes 103 arranged at equal angles on the edge of the circular connector 102 match the threaded holes on the mounting base 201, ensuring high-precision positioning during installation and avoiding performance degradation due to installation errors.

[0047] Specifically, in this embodiment, a plurality of reinforcing ribs 104 are integrally provided between the outer side of the circular connecting seat 102 and the concave arc surface of the arc-shaped reflector 101. The plurality of reinforcing ribs 104 are arranged in a circumferential angle around the circular connecting seat 102. The plurality of reinforcing ribs 104 arranged in a circumferential angle around the circular connecting seat 102 not only increases the overall rigidity of the arc-shaped reflector 101, but also effectively prevents deformation problems that may occur during long-term use. In addition, the design of the reinforcing ribs 104 takes into account the characteristics of stress distribution, and can evenly disperse stress when subjected to large pressure, thus extending the service life of the structure. At the same time, it also helps to maintain the working state of the reflector and ensure that it can stably perform its vibration reduction and noise reduction functions for a long time.

[0048] Specifically, in this embodiment, in order to further optimize the acoustic performance of the arc-shaped reflector 101, its shape design is based on the following wave equation:

[0049]

[0050] Where u(x,y,z,t) represents the sound wave displacement at position (x,y,z) and time t, and c is the sound wave propagation speed in the medium. By solving this equation and combining it with specific parameters of the car door subwoofer 2, such as frequency response and power, the optimal curvature and size of the arc-shaped reflector 101 can be determined to achieve the best sound wave reflection effect and vibration reduction.

[0051] The design of the arc-shaped reflector 101 also takes into account the diffraction effect of sound waves, by introducing a diffraction equation:

[0052]

[0053] Where Iθ is the sound wave intensity at a diffraction angle of θ, I0 is the sound wave intensity without diffraction, and a is the radius or related dimensional parameter of the arc-shaped reflector 101. This equation is used to optimize the edge shape of the arc-shaped reflector 101 to reduce energy loss caused by sound wave diffraction and enhance sound wave reflection in a specific direction.

[0054] The wave equation is a mathematical formula describing the propagation of waves in a medium. It reveals the finite propagation speed of waves, the laws governing the variation of wave shape with time and space, and phenomena such as wave superposition, interference, and diffraction. In the vibration reduction structure of the aforementioned car door subwoofer, the wave equation was used to determine the optimal curvature and dimensions of the arc-shaped reflector 101. The specific application is as follows:

[0055] Determine the sound wave displacement: Using the wave equation, the sound wave displacement u(x,y,z,t) at a specific location and time can be calculated, which helps to understand the propagation of sound waves inside the car door.

[0056] Optimize the reflector design: By combining specific parameters of the car door subwoofer 2 (such as frequency response, power, etc.) and solving the wave equation, the optimal curvature and size of the arc-shaped reflector 101 can be determined to achieve the best sound wave reflection effect and vibration reduction.

[0057] The diffraction equation describes the propagation of waves as they pass through obstacles or holes. In the aforementioned vibration reduction structure for a car door subwoofer, the diffraction equation is used to optimize the edge shape of the arc-shaped reflector 101 to reduce energy loss caused by sound wave diffraction and enhance sound wave reflection in specific directions. Specific applications are as follows:

[0058] Calculate the diffraction intensity: The sound wave intensity I(θ) at a specific diffraction angle can be calculated using the diffraction equation, which helps to understand the diffraction of the sound wave at the edge of the arc-shaped reflector 101.

[0059] Optimize edge shape: Based on the calculation results of the diffraction equation, the edge shape of the arc-shaped reflector 101 can be adjusted to reduce energy loss caused by sound wave diffraction and enhance sound wave reflection in a specific direction, thereby improving the acoustic performance of the car door subwoofer.

[0060] By introducing wave equations and diffraction equations, and optimizing the design of the arc-shaped reflector 101, the following technical effects can be achieved:

[0061] Improved acoustic performance: The optimized arc-shaped reflector 101 can reflect sound waves more effectively and guide them in a specific direction (such as radiating them towards the outer door panel at a 65-75 degree angle), thereby improving the acoustic performance of the door subwoofer.

[0062] Reduce vibration and noise: By optimizing the design of the arc-shaped reflector 101, the vibration of the door caused by the operation of the door subwoofer 2 can be reduced, thereby reducing vibration and noise and improving the vehicle's NVH performance.

[0063] Enhancing the driving and riding experience: Reducing vibration and noise and improving acoustic performance will improve driving and riding comfort, allowing passengers to enjoy a more pleasant auditory experience while driving.

[0064] In summary, by introducing wave equations and diffraction equations and optimizing the design of the arc-shaped reflector 101, the acoustic performance of the car door subwoofer can be significantly improved, vibration noise reduced, and the driving and riding experience enhanced.

[0065] Specifically, in this embodiment, when the door subwoofer 2 is installed on the inner door panel, the arc-shaped reflector 101 is located between the inner door panel and the outer door panel, so that the arc-shaped reflector 101 can effectively disperse and guide sound waves, reduce the vibration energy directly acting on the outermost sheet metal of the door panel, and thus significantly reduce NVH noise.

[0066] In summary, the vibration reduction structure for the car door subwoofer provided in this embodiment, through carefully designed vibration reduction components, arc-shaped reflectors and their connecting assemblies, as well as reasonable material selection and structural optimization, achieves significant vibration reduction and noise reduction effects, improves the vehicle's NVH performance, and provides a quieter and more comfortable riding environment for the driver and passengers.

[0067] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vibration reduction structure for a car door subwoofer, characterized in that, include: A vibration reducing component (1) is used to reduce the vibration noise of the door subwoofer. The vibration reducing component (1) is installed at the rear end of the door subwoofer (2). The vibration reducing component (1) is circular in shape. The vibration reducing component (1) is coaxially arranged with the door subwoofer (2). The diameter of the vibration reducing component (1) is smaller than the inner diameter of the rear end of the door subwoofer (2), so that an annular gap is formed between the edge of the vibration reducing component (1) and the inner edge of the rear end of the door subwoofer (2).

2. The vibration reduction structure for the car door subwoofer according to claim 1, characterized in that, The rear end of the vibration reducing member (1) protrudes from the inner side of the rear end of the door subwoofer (2).

3. The vibration reduction structure for the car door subwoofer according to claim 2, characterized in that, The vibration reduction component (1) includes an arc-shaped reflector (101), which is installed at the rear end of the door subwoofer (2) via a connecting assembly. The convex arc surface of the arc-shaped reflector (101) is positioned facing the front end of the door subwoofer (2). Under the action of the arc-shaped reflector (101), the sound waves generated by the door subwoofer (2) when it is working are reflected to a 65-75 degree direction and emitted towards the outer door panel. This can effectively reduce the vibration of the door caused by the operation of the door subwoofer (2), improve the NVH performance of the vehicle, and enhance the driving and riding experience.

4. The vibration reduction structure for the car door subwoofer according to claim 3, characterized in that, The arc-shaped reflector (101) is made of a lightweight, high-strength material, including but not limited to aluminum alloy or high-temperature plastic composite material, to reduce weight and improve durability.

5. The vibration reduction structure for a car door subwoofer according to claim 4, characterized in that, The connecting assembly includes a circular connector (102) and a mounting base (201). The circular connector (102) is integrally disposed at the middle position of the arc-shaped reflector (101). The mounting base (201) is fixedly installed inside the rear end of the door subwoofer (2). The mounting base (201) is fixedly connected to the circular connector (102) by screws (105).

6. The vibration reduction structure for a car door subwoofer according to claim 5, characterized in that, The circular connector (102) has a plurality of mounting holes (103) integrally formed at its edge, arranged in a circumferential and equidistant manner. The mounting base (201) is provided with threaded holes. The screw (105) passes through the mounting holes (103) and is screwed into the threaded holes on the mounting base (201), thereby fixing the circular connector (102) on the mounting base (201) and fixing the arc-shaped reflector (101) on the rear end of the car door subwoofer (2).

7. The vibration reduction structure for a car door subwoofer according to claim 6, characterized in that, A plurality of reinforcing ribs (104) are integrally provided between the outer side of the circular connecting seat (102) and the concave arc surface of the arc-shaped reflector (101), and the plurality of reinforcing ribs (104) are arranged in a circumferential and equidistant manner around the circular connecting seat (102).

8. The vibration reduction structure for a car door subwoofer according to claim 7, characterized in that, The shape design of the arc-shaped reflector (101) is based on the following wave equation: Where u(x,y,z,t) represents the sound wave displacement at position (x,y,z) and time t, and c is the sound wave propagation speed in the medium. By solving this equation and combining it with the parameters of the car door subwoofer (2), the optimal curvature and size of the arc-shaped reflector (101) can be determined to achieve the best sound wave reflection effect and vibration reduction.

9. The vibration reduction structure for a car door subwoofer according to claim 8, characterized in that, The edge shape design of the arc-shaped reflector (101) is optimized using the following diffraction equation: Where I(θ) is the sound wave intensity when the diffraction angle is θ, I0 is the sound wave intensity without diffraction, and a is the radius or related dimensional parameter of the arc-shaped reflector (101). This equation is used to optimize the edge shape of the arc-shaped reflector (101) to reduce energy loss caused by sound wave diffraction and enhance sound wave reflection in a set direction.

10. The vibration reduction structure for a car door subwoofer according to any one of claims 3-9, characterized in that, When the door subwoofer (2) is installed on the inner door panel, the arc-shaped reflector (101) is located between the inner door panel and the outer door panel.

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