Automobile floor assembly with noise reduction function

Abstract

The utility model provides an automobile bottom plate assembly with a noise reduction function, and relates to the technical field of automobile parts, the automobile bottom plate assembly comprises a bottom plate body, the outer side of the bottom plate body is fixedly connected with a sound insulation and noise reduction component, and the sound insulation and noise reduction component comprises a sound insulation and noise reduction component. A plurality of convex surfaces are fixedly connected to the bottom end of the bottom plate body, a concave surface is fixedly connected to the adjacent side of each convex surface, and the sound insulation and noise reduction assembly is arranged, so that the contact area of the automobile bottom plate assembly is increased through a wave-shaped structure fixedly connected with the convex surfaces and the concave surfaces; the mineral wool material of the sound insulation layer and the polyurethane foam material of the noise reduction layer work cooperatively, noise is effectively isolated and absorbed, the riding comfort is improved, and the influence of the noise on the environment in a vehicle is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an automobile bottom plate assembly with a noise reduction function. Background Art

[0002] The car floor is located under the chassis of the vehicle and is part of the chassis system. The floor is located on the top of the chassis and is the structure between the chassis and the body. It is usually made of metal materials (such as steel plates) and has sufficient strength and rigidity to support the entire vehicle and provide protection and structural support.

[0003] The existing patent CN211308439U discloses a car chassis noise reduction device. The device is a spoiler fixed on the engine compartment bottom guard plate close to the chassis bottom plate; the spoiler is bilaterally symmetrical and has an arc, with a thickness of 3mm; the arc part of the spoiler is 30mm wide, and the overall width of the spoiler is 40mm; the length of the spoiler is the same as the width of the engine compartment bottom guard plate; the arc opening direction of the spoiler is the rear of the car; the rear of the spoiler is 200mm away from the rear of the engine compartment bottom guard plate. From the perspective of aerodynamics, this utility model adopts CFD simulation technology, and by installing the engine compartment bottom guard plate and spoiler at a suitable position, the airflow flow condition of the lower part of the car chassis is changed, thereby reducing the wind noise generated by the airflow, which does not affect the structure and appearance of the whole vehicle, and also meets the platform universalization.

[0004] The above technical solution solves the problem of airflow turbulence and noise when the car is driving at high speed. However, there are still some shortcomings. For example, when the car is driving on an uneven road, the vibration frequency and amplitude of the chassis will change continuously. This change in vibration leads to the generation of noise of different frequencies and intensities. These noises can come from various components of the chassis, such as the suspension system, tires, transmission system, etc., which are vibrated by the uneven road surface, or they can be caused by the resonance effect of the body structure. As the speed and road conditions change, the frequency and intensity of these noises will also change continuously.

[0005] Therefore, the utility model provides an automobile floor assembly with noise reduction function. Utility Model Content

[0006] The purpose of the utility model is to solve the shortcomings of the prior art and provide an automobile floor assembly with a noise reduction function.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: an automobile floor assembly with noise reduction function, comprising a floor body, and a sound insulation and noise reduction component is fixedly connected to the outer side of the floor body;

[0008] The sound insulation and noise reduction component includes a connecting surface, the inner wall of the connecting surface is fixedly connected to the base plate body, the outer side of the connecting surface is provided with shock-absorbing glue, the bottom end of the base plate body is fixedly connected with multiple convex surfaces, and the adjacent side of each convex surface is fixedly connected with a concave surface.

[0009] As a preferred embodiment, a sound insulation layer is arranged inside the convex surface, a noise reduction layer is fixedly connected inside the concave surface, and a shock absorbing layer is arranged at one end of the noise reduction layer away from the sound insulation layer.

[0010] The technical effect of adopting the above further solution is: in the sound insulation and noise reduction component, a sound insulation layer is arranged inside the convex surface, a noise reduction layer is fixedly connected inside the concave surface, and a shock absorbing layer is arranged at one end of the noise reduction layer away from the sound insulation layer. Such a design can achieve multi-level sound insulation, noise reduction and shock absorption effects, and improve the ride comfort of the vehicle.

[0011] As a preferred implementation, a plurality of mounting holes are provided on the outer side of the base plate body.

[0012] The technical effect of adopting the above further solution is: the provision of multiple mounting holes can ensure the uniform distribution of the sound insulation and noise reduction components on the base plate body, and can effectively cover the entire base plate area.

[0013] As a preferred implementation, the material of the sound insulation layer is mineral wool.

[0014] The technical effect of adopting the above further solution is that mineral wool, as the material of the sound insulation layer, can effectively absorb and dissipate sound waves, thereby reducing the noise level in the car and improving riding comfort.

[0015] As a preferred implementation, the material of the noise reduction layer is polyurethane foam, and the noise reduction layer is fixedly connected to the sound insulation layer by a two-component structural adhesive.

[0016] The technical effect of adopting the above further solution is: as the material of the noise reduction layer, the polyurethane foam can effectively reduce the noise generated by the engine, wheels, road surface and other parts, and improve the comfort and quietness in the car.

[0017] As a preferred implementation, the shock absorbing layer is made of rubber, and the shock absorbing layer and the noise reduction layer are fixedly connected by hot-melt welding.

[0018] The technical effect of adopting the above further solution is that as the material of the shock-absorbing layer, rubber can absorb and disperse vibration energy, thereby improving the driving stability and riding comfort of the vehicle.

[0019] Compared with the prior art, the advantages and positive effects of the utility model are:

[0020] By providing a sound insulation and noise reduction component, the automobile floor assembly is fixedly connected with a wavy structure having convex and concave surfaces, and the internal convex and concave surfaces are further fixedly connected with a sound insulation layer and a noise reduction layer, thereby increasing the contact area, thereby leading to a more uniform pressure distribution between the floor body and the sound insulation and noise reduction component, wherein the mineral wool material of the sound insulation layer and the polyurethane foam material of the noise reduction layer work together to effectively isolate and absorb noise. Such a configuration not only improves the riding comfort, but also reduces the impact of noise on the interior environment of the vehicle, and effectively solves the problem of noise generation of different frequencies and intensities caused by changes in chassis vibration frequency and amplitude when the vehicle is driving at high speed and passing through uneven roads. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of an automobile floor assembly with noise reduction function provided by the utility model;

[0022] Figure 2 A schematic diagram of the connection surface structure of a vehicle floor assembly with noise reduction function provided by the utility model;

[0023] Figure 3 A schematic diagram of a convex structure of a vehicle floor assembly with noise reduction function provided by the utility model;

[0024] Figure 4 The utility model provides a structural schematic diagram of a sound insulation and noise reduction component of an automobile floor assembly with noise reduction function.

[0025] Legend:

[0026] 1. Base plate body; 2. Sound insulation and noise reduction components; 21. Connection surface; 22. Shock-absorbing glue; 23. Convex surface; 24. Concave surface; 25. Sound insulation layer; 26. Noise reduction layer; 27. Shock-absorbing layer; 3. Installation hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1 - Figure 3As shown, this embodiment provides a technical solution: an automobile floor assembly with noise reduction function, comprising a floor body 1, a sound insulation and noise reduction component 2 is fixedly connected to the outer side of the floor body 1, the sound insulation and noise reduction component 2 comprises a connecting surface 21, the inner wall of the connecting surface 21 is fixedly connected to the floor body 1, a shock absorbing rubber 22 is arranged on the outer side of the connecting surface 21, a plurality of convex surfaces 23 are fixedly connected to the bottom end of the floor body 1, and a concave surface 24 is fixedly connected to the adjacent side of each convex surface 23, the floor body 1 is the foundation of the whole structure, and its bottom end is fixedly connected to There are multiple convex surfaces 23 and concave surfaces 24. Since the convex and concave connections form a wave shape, the wavy convex-concave connection can increase the contact area of ​​the connecting surface 21, thereby improving the contact effect between the base plate body 1 and the sound insulation and noise reduction component 2. By increasing the contact area, the pressure can be distributed more evenly, and the stability and reliability of the connection are improved. At the same time, a shock-absorbing rubber 22 is provided on the outer side of the connecting surface 21. This shock-absorbing rubber 22 has excellent shock-absorbing performance and can effectively reduce the degree of vibration and noise transmitted from the chassis to the vehicle compartment.

[0029] Furthermore, Figure 3 - Figure 4 As shown: a sound insulation layer 25 is provided inside the convex surface 23, a noise reduction layer 26 is fixedly connected inside the concave surface 24, and a shock absorbing layer 27 is provided at one end of the noise reduction layer 26 away from the sound insulation layer 25. The sound insulation layer 25 is located inside the convex surface 23, and its function is to isolate external noise and prevent it from entering the interior of the vehicle. The noise reduction layer 26 is fixedly connected to the inside of the concave surface 24, and its main function is to absorb and eliminate the noise generated inside the vehicle. The function of the shock absorbing layer 27 is to further reduce the vibration and impact transmitted from the chassis, reduce their impact on the vehicle compartment, and further improve the ride comfort.

[0030] In order to solve the noise and resonance problems generated by the car during driving, such as Figure 1 and Figure 4As shown: the material of the sound insulation layer 25 is mineral wool, the material of the noise reduction layer 26 is polyurethane foam, the noise reduction layer 26 and the sound insulation layer 25 are fixedly connected by a two-component structural adhesive, the shock absorption layer 27 is made of rubber, and the shock absorption layer 27 and the noise reduction layer 26 are fixedly connected by hot melt welding. Mineral wool is an excellent sound insulation material that can effectively isolate the propagation of external noise. It has a high density and good sound absorption performance, and can effectively reduce the noise from the vehicle chassis and the road surface. Mineral wool also has the characteristics of high temperature resistance and corrosion resistance, and can maintain a good sound insulation effect in the car floor for a long time. Polyurethane foam is a lightweight material with high sound absorption performance. Through its fine bubble structure, it can effectively absorb and disperse the noise generated in the car and improve the riding comfort. The noise reduction layer 26 and the sound insulation layer 25 are fixedly connected by a two-component structural adhesive to ensure that the two are stable and can effectively cooperate to reduce noise. The rubber material has good elasticity and shock absorption performance. By using hot melt welding to fix the shock absorption layer 27 and the noise reduction layer 26, a firm connection between the two can be ensured to achieve a better shock absorption effect. The excellent properties of rubber materials can effectively eliminate vibrations and impacts transmitted from the chassis and improve ride comfort.

[0031] A plurality of mounting holes 3 are provided on the outer side of the base plate body 1. The number and position of the mounting holes 3 are usually determined according to the design of the vehicle base plate and the shape and size of the sound insulation and noise reduction component 2 to ensure that the base plate can be completely covered and the uniformity and stability of the connection are guaranteed.

[0032] Working principle:

[0033] like Figure 1 - Figure 4 As shown:

[0034] When in use: First, the automobile floor body 1 serves as the basis of the entire structure, and its outer side is combined with the sound insulation and noise reduction component 2 by a fixed connection method, wherein the bottom end of the floor body 1 is designed with a plurality of convex surfaces 23 and concave surfaces 24. This wavy convex-concave structure increases the contact area between the floor body 1 and the sound insulation and noise reduction component 2, thereby driving the improvement of the stability and reliability of the overall connection. The interior of the convex surface 23 and the concave surface 24 are respectively installed with a sound insulation layer 25 and a noise reduction layer 26, and the sound insulation layer 25 and the noise reduction layer 26 are fixedly connected by a two-component structural adhesive to ensure that the two are stable and can work together effectively to achieve a better noise reduction effect. The sound insulation layer 25 effectively isolates external noise through the characteristics of mineral wool materials, while the noise reduction layer 26 absorbs and eliminates the noise generated inside the vehicle through polyurethane foam, and a shock-absorbing layer 27 is also arranged between the floor and the sound insulation layer 25 and the noise reduction layer 26. The shock-absorbing layer 27 is made of rubber material, which effectively reduces vibration and noise transmission and improves riding comfort. Then the shock-absorbing adhesive 22 has good shock absorption performance and can effectively reduce vibration and impact from the chassis. This setting further improves the shock absorption effect, thereby enhancing the driving comfort of the entire vehicle.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An automobile floor assembly with noise reduction function, comprising a floor body (1), characterized in that: A sound insulation and noise reduction component (2) is fixedly connected to the outer side of the base plate body (1); The sound insulation and noise reduction component (2) comprises a connection surface (21), the inner wall of the connection surface (21) is fixedly connected to the base plate body (1), the outer side of the connection surface (21) is provided with a shock-absorbing rubber (22), the bottom end of the base plate body (1) is fixedly connected to a plurality of convex surfaces (23), and the adjacent side of each convex surface (23) is fixedly connected to a concave surface (24).

2. The automobile floor assembly with noise reduction function according to claim 1, characterized in that: A sound insulation layer (25) is disposed inside the convex surface (23), a noise reduction layer (26) is fixedly connected inside the concave surface (24), and a shock absorbing layer (27) is disposed at one end of the noise reduction layer (26) away from the sound insulation layer (25).

3. The automobile floor assembly with noise reduction function according to claim 1, characterized in that: A plurality of mounting holes (3) are provided on the outer side of the base plate body (1).

4. The automobile floor assembly with noise reduction function according to claim 2, characterized in that: The material of the sound insulation layer (25) is mineral wool.

5. The automobile floor assembly with noise reduction function according to claim 2, characterized in that: The material of the noise reduction layer (26) is polyurethane foam, and the noise reduction layer (26) and the sound insulation layer (25) are fixedly connected by a two-component structural adhesive.

6. The automobile floor assembly with noise reduction function according to claim 2, characterized in that: The shock absorbing layer (27) is made of rubber material, and the shock absorbing layer (27) and the noise reduction layer (26) are fixedly connected by hot-melt welding.

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