Damping and sound-absorbing cotton structure for automobile

Abstract

The utility model discloses a shock absorption and sound absorption cotton structure for an automobile, and relates to the technical field of shock absorption and sound absorption cotton, the shock absorption and sound absorption cotton structure comprises an outer top plate, an inner sound absorption mechanism is fixedly connected below the outer top plate, and a plurality of groups of fixed rotating seats are fixedly connected above the inner sound absorption mechanism; through the telescopic synergistic effect of the multiple sets of damping rods and the supporting springs, directional attenuation is conducted on vibration energy perpendicular to the outer top plate, and energy dispersion caused by multi-degree-of-freedom vibration is avoided; a double-side rotating seat, a first damping rod and a second damping rod are matched, a multi-stage dissipation path of vibration energy in the vertical direction is formed, the damping efficiency is remarkably improved, the vibration energy enters the sound absorption cotton layer in a directional mode through the hard dense-hole bottom plate, and high-frequency noise attenuation is achieved; the high-density sponge layer absorbs low and medium frequency sound waves through pore resonance, the aluminum foil layer forms a sound and heat isolation barrier through the dual functions of sound reflection and heat radiation blocking, and finally the integrity of a sound wave gradient attenuation path is guaranteed through supporting of the rubber supporting columns.

Description

TECHNICAL FIELD

[0001] The utility model relates to shock absorption sound absorption cotton technical field especially, a shock absorption sound absorption cotton structure for car. BACKGROUND

[0002] With the development of modernization, the car has become the indispensable tool in people's life. However, people's control requirements for automobile noise and vibration are also higher and higher, therefore, effectively controlling automobile noise and vibration plays a positive role in the development of automobile industry. Through the search, the existing traditional damping system relies on single element such as spring to consume energy, lacks multidirectional linkage mechanism, vertical impact energy cannot be converted into deformation dissipation in other directions through mechanical structure, the pressure and use intensity of single direction energy consumption element are too large, and local element overload damage is easy to cause, therefore, a shock absorption sound absorption cotton structure for car is provided to solve the above problems. SUMMARY

[0003] The utility model discloses a shock absorption sound absorption cotton structure for car, which can convert vertical vibration energy into deformation dissipation in multiple directions, significantly improve the shock absorption efficiency, and solve the problems in the background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme: a shock absorption sound absorption cotton structure for car, comprising: an outer top plate, a plurality of groups of fixed rotating seats are fixedly connected above the inner sound absorption mechanism, a first damping rod is rotatably connected to the inner side of the fixed rotating seat, a first supporting spring is sleeved on the outer side of the first damping rod, a group of second damping rods are fixedly connected above the inner sound absorption mechanism and located between every two groups of fixed rotating seats, a second supporting spring is sleeved on the outer side of the second damping rod, a double-side rotating seat is fixedly connected above the second damping rod, and a supporting top block is fixedly connected above the double-side rotating seat.

[0005] The inner sound absorption mechanism comprises a hard dense hole bottom plate, an acoustic cotton layer is arranged below the hard dense hole bottom plate, a high-density sponge layer is arranged below the acoustic cotton layer, an aluminum foil layer is arranged below the high-density sponge layer, a bottom glue layer is arranged below the aluminum foil layer, and a plurality of groups of rubber supporting columns are fixedly connected between the hard dense hole bottom plate and the bottom glue layer.

[0006] As a further scheme of the utility model: the first supporting spring and the first damping rod are fixedly connected to the outer sides of the two ends respectively.

[0007] As a further scheme of the utility model: the double-side rotating seat is rotatably connected to the other end of the first damping rod.

[0008] As a further scheme of the utility model: the two ends of the second supporting spring are fixedly connected with the upper side of the inner sound absorption mechanism and the lower side of the double-side rotating seat respectively.

[0009] As a further scheme of the utility model: the upper side of the supporting top block is fixedly connected with the lower side of the outer top plate.

[0010] As a further scheme of the utility model: the fixed rotating seat and the second damping rod are both fixed on the upper side of the hard dense hole bottom plate.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1. In the utility model, the first damping rod and the first supporting spring are in cooperation with each other in the extension and retraction, and the second damping rod and the second supporting spring are in axial compression deformation, so that the vibration energy perpendicular to the surface of the outer top plate or the inner sound absorption mechanism is attenuated in the direction, and the energy dispersion caused by the multi-degree-of-freedom vibration is avoided; the linkage design of the double-side rotating seat and the fixed rotating seat converts the vertical impact into the rotational displacement of the first damping rod and the axial movement of the second damping rod, forms a multi-stage dissipation path of the vertical vibration energy, and significantly improves the shock absorption efficiency.

[0013] 2. In the utility model, the sound waves are guided to enter the sound absorption cotton layer in the direction through the micropore structure of the hard dense hole bottom plate, the high-frequency noise is rapidly attenuated through the fiber friction; the high-density sponge layer precisely absorbs the medium and low-frequency sound waves through the pore resonance effect, the aluminum foil layer forms a sound-heat isolation barrier through the double functions of sound reflection and heat radiation blocking, and finally, the acoustic layers are stably spaced through the elastic support of the rubber support column, and the integrity of the sound wave gradient attenuation path is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the overall structure schematic view of the utility model;

[0015] Fig. 2 It is the structure schematic view of the second perspective of the utility model;

[0016] Fig. 3 It is the structure schematic view of the fixed rotating seat in the utility model;

[0017] Fig. 4 It is the structure schematic view of the second damping rod and the second supporting spring in the utility model.

[0018] In the diagram: 1. Outer top plate; 2. Inner sound absorption mechanism; 3. Fixed rotating seat; 4. First damping rod; 5. First support spring; 6. Second damping rod; 7. Second support spring; 8. Double-sided rotating seat; 9. Support top block; 21. Rigid perforated bottom plate; 22. Sound-absorbing cotton layer; 23. High-density sponge layer; 24. Aluminum foil layer; 25. Base adhesive layer; 26. Rubber support column. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying 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, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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. The embodiments of this utility model will be described below based on its overall structure.

[0021] Reference Figs. 1 to 4In this embodiment of the present invention, a shock-absorbing and sound-absorbing cotton structure for automobiles includes: an outer top plate 1, an inner sound-absorbing mechanism 2 fixedly connected to the lower part of the outer top plate 1, multiple sets of fixed rotating seats 3 fixedly connected to the upper part of the inner sound-absorbing mechanism 2, a first damping rod 4 rotatably connected to the inner side of the fixed rotating seat 3, a first support spring 5 sleeved on the outer side of the first damping rod 4, the first support spring 5 being fixedly connected to the outer sides of both ends of the first damping rod 4 respectively, a second damping rod 6 fixedly connected to the upper part of the inner sound-absorbing mechanism 2 between every two sets of fixed rotating seats 3, a second support spring 7 sleeved on the outer side of the second damping rod 6, a double-sided rotating seat 8 fixedly connected to the upper part of the second damping rod 6, the inner sides of both ends of the double-sided rotating seat 8 being rotatably connected to the other end of the first damping rod 4 respectively, the two ends of the second support spring 7 being fixedly connected to the upper part of the inner sound-absorbing mechanism 2 and the lower part of the double-sided rotating seat 8 respectively, a support top block 9 fixedly connected to the upper part of the double-sided rotating seat 8, and the upper part of the support top block 9 being fixedly connected to the lower part of the outer top plate 1;

[0022] When the outer top plate 1 is subjected to vibration and impact, the support block 9 transmits the pressure to the double-sided rotating seat 8. The first damping rods 4 on both sides of the double-sided rotating seat 8 rotate around the fixed rotating seat 3. At this time, the first support spring 5 and the first damping rod 4 absorb the longitudinal impact energy through extension and contraction deformation. Meanwhile, the second damping rod 6 generates axial displacement under the drive of the double-sided rotating seat 8. The second support spring 7 absorbs the lateral vibration energy through compression deformation, forming a multi-directional damping buffer system, which effectively attenuates the transmission of vibration in different directions.

[0023] The internal sound absorption mechanism 2 includes a rigid perforated base plate 21, a fixed rotating seat 3 and a second damping rod 6, both of which are fixed above the rigid perforated base plate 21. A sound-absorbing cotton layer 22 is provided below the rigid perforated base plate 21, a high-density sponge layer 23 is provided below the sound-absorbing cotton layer 22, an aluminum foil layer 24 is provided below the high-density sponge layer 23, and a base adhesive layer 25 is provided below the aluminum foil layer 24. Several sets of rubber support columns 26 are fixedly connected between the rigid perforated base plate 21 and the base adhesive layer 25.

[0024] The uniformly distributed micropores on the surface of the rigid, porous base plate 21 guide sound waves into the sound-absorbing cotton layer 22 for multi-level scattering. The sound-absorbing cotton layer 22 converts sound energy into heat energy through fiber friction. The high-density sponge layer 23 absorbs mid-to-low frequency sound waves through pore resonance. The aluminum foil layer 24 reflects residual sound waves and blocks heat radiation conduction. The rubber support column 26 forms an elastic support network in the vertical direction. Combined with the bonding and fixing of the base adhesive layer 25, it prevents the material layers from undergoing excessive deformation when subjected to vibration, which would affect the service life. At the same time, the shear deformation of the rubber support column 26 further consumes vibration energy, achieving composite attenuation of sound and vibration energy.

[0025] The working principle of this utility model is as follows: When the outer top plate 1 is subjected to external impact, the support top block 9 transmits the pressure to the double-sided rotating seat 8, driving the first damping rod 4 connected at both ends to rotate around the fixed rotating seat 3. At this time, the first support spring 5 absorbs the longitudinal vibration energy with the extension and contraction deformation of the first damping rod 4. At the same time, the displacement of the double-sided rotating seat 8 forces the second damping rod 6 to move axially. The second support spring 7 strengthens the absorption of longitudinal vibration energy through compression deformation combined with the damping effect of the second damping rod 6. The hard, densely perforated bottom plate 21 of the inner sound absorption mechanism 2 is provided with a rubber support column 26. Its elastic compression and shear deformation further disperse the vertical and lateral vibrations. With the bonding and fixing of the bottom adhesive layer 25, it prevents the high-density sponge layer 23, sound-absorbing cotton layer 22 and other material layers from being misaligned due to vibration, forming a multi-dimensional mechanical energy dissipation system.

[0026] External noise is introduced into the sound-absorbing cotton layer 22 through the microporous structure of the rigid, densely perforated base plate 21. The sound waves are converted into heat energy due to multiple scattering and friction in the fiber gaps. The low- and mid-frequency sound waves that are not completely absorbed penetrate into the high-density sponge layer 23 and are further attenuated by the air resonance effect in the pores. When the residual sound waves reach the aluminum foil layer 24, its smooth surface reflects the sound waves to form a sound barrier, while blocking the heat radiation conduction of the engine compartment. The elastic support of the rubber support column 26 in the vertical direction maintains the stability of the structure of each material layer and avoids the change of the interlayer gap from affecting the acoustic performance. Finally, the gradient absorption and reflection isolation of sound wave energy from high frequency to low frequency is achieved.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A shock-absorbing and sound-absorbing cotton structure for automobiles, characterized in that, include: An outer top plate (1) is fixedly connected to an inner sound-absorbing mechanism (2) below the outer top plate (1). Multiple sets of fixed rotating seats (3) are fixedly connected above the inner sound-absorbing mechanism (2). A first damping rod (4) is rotatably connected to the inner side of the fixed rotating seat (3). A first support spring (5) is sleeved on the outer side of the first damping rod (4). A set of second damping rods (6) is fixedly connected above the inner sound-absorbing mechanism (2) between every two sets of fixed rotating seats (3). A second support spring (7) is sleeved on the outer side of the second damping rod (6). A double-sided rotating seat (8) is fixedly connected above the second damping rod (6). A support top block (9) is fixedly connected above the double-sided rotating seat (8). The internal sound-absorbing mechanism (2) includes a rigid perforated base plate (21), a sound-absorbing cotton layer (22) is provided below the rigid perforated base plate (21), a high-density sponge layer (23) is provided below the sound-absorbing cotton layer (22), an aluminum foil layer (24) is provided below the high-density sponge layer (23), a base adhesive layer (25) is provided below the aluminum foil layer (24), and a number of rubber support columns (26) are fixedly connected between the rigid perforated base plate (21) and the base adhesive layer (25).

2. The shock-absorbing and sound-absorbing cotton structure for automobiles according to claim 1, characterized in that, The first support spring (5) is fixedly connected to the outer ends of the first damping rod (4).

3. The shock-absorbing and sound-absorbing cotton structure for automobiles according to claim 1, characterized in that, The inner sides of both ends of the double-sided rotating seat (8) are rotatably connected to the other end of the first damping rod (4).

4. The shock-absorbing and sound-absorbing cotton structure for automobiles according to claim 1, characterized in that, The two ends of the second support spring (7) are fixedly connected to the top of the inner sound-absorbing mechanism (2) and the bottom of the double-sided rotating seat (8), respectively.

5. The shock-absorbing and sound-absorbing cotton structure for automobiles according to claim 1, characterized in that, The upper part of the support block (9) is fixedly connected to the lower part of the outer top plate (1).

6. The shock-absorbing and sound-absorbing cotton structure for automobiles according to claim 1, characterized in that, The fixed rotating seat (3) and the second damping rod (6) are both fixed above the rigid perforated bottom plate (21).

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