CN218949095U

CN218949095U - New energy automobile skateboard chassis internal and external sound absorption metamaterial damping sound insulation structure

Info

Publication number: CN218949095U
Application number: CN202223274523.4U
Authority: CN
Inventors: 樊大申
Original assignee: Suzhou Loud Technology Co ltd
Current assignee: Suzhou Loud Technology Co ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-05-02
Anticipated expiration: 2032-12-07

Abstract

The utility model relates to a new energy automobile sliding plate chassis internal and external sound absorption metamaterial damping and sound insulation structure, which comprises a non-bearing sliding plate chassis, wherein sound absorption metamaterial plates are arranged in and/or outside the non-bearing sliding plate chassis corresponding to a new energy automobile, and are used for absorbing low-frequency noise caused by vibration, and damping and sound insulation parts for reducing or isolating road noise and tire noise to form a new energy automobile setting structure.

Description

New energy automobile skateboard chassis internal and external sound absorption metamaterial damping sound insulation structure

Technical Field

The utility model relates to a new energy automobile and a structure thereof, in particular to a damping and sound-insulating technology of the new energy automobile, and specifically relates to a damping and sound-insulating structure of an inner and outer sound-absorbing metamaterial of a chassis of a sliding plate of the new energy automobile.

Background

The noise source of the conventional gasoline or diesel vehicle is complicated. The main noise sources include engine noise, exhaust pipe noise, engine air inlet noise, air conditioner air outlet noise, wind noise and road noise. In particular, noise generated by the friction between the tires of the vehicle and the road surface, is transmitted to the chassis of the vehicle through the four-wheel damper and then transmitted into the interior of the vehicle through the chassis. This is called road noise. Because the road noise is mainly based on low noise, the road noise is difficult to be blocked by the passive sound insulation material of the traditional acoustic package of the automobile. Most of it still passes into the vehicle and is loud. Although such low frequency noise is not as harsh as medium and high frequency noise, a booming sound is formed because they are much louder than medium and high frequency noise. Drivers may be familiar with such low frequency road noise, and neglect their hearing and physical harm.

But new energy vehicles are currently the fastest growing ones. Most are electric vehicles. The electric car has no engine, no exhaust pipe and no air inlet. A significant portion of the car noise is reduced. Electric vehicles are quite quiet because the sound of the motor is very small. Therefore, road noise caused by friction between the tire and the road surface increases as a first noise source for the electric vehicle. The second is wind noise. Road noise and wind noise are the main noises of electric vehicles.

Wind noise can be improved by optimizing aerodynamic design and sound insulation materials, such as replacing a huge prominent rearview mirror with a camera to improve the aerodynamic performance of the automobile; or a laminated glass window is adopted to reduce wind noise; and can be further eliminated by using another active noise elimination technology of the glass window invented by the inventor. But low frequency road noise from the chassis of the automobile is difficult to isolate by these methods. The utility model aims to solve the problems of road noise, including friction noise generated by tires and the ground, conducted into a vehicle through a chassis of the vehicle.

Road noise and tire noise are mainly low-frequency noise transmitted into the automobile cabin through vibration of the automobile chassis. The low-frequency noise has the characteristics of difficult attenuation, strong penetrating power and the like, and can seriously influence the daily life and physical and mental health of people. The absorption of low frequency noise has been a challenging task due to its inherent weak energy dissipation. While the porous material of conventional acoustic wraps and conventional microperforated sound absorbers can effectively absorb noise, a structural thickness commensurate with the operating wavelength is generally required, which severely hampers its application in the low frequency range.

The sound absorption super-structure material is added inside and outside the chassis of the skateboard of the new energy automobile to realize shock absorption and sound insulation, so that the road noise and sound insulation problem of the space in the new energy automobile can be effectively solved.

Therefore, the novel energy automobile skateboard chassis inner and outer sound absorption metamaterial shock absorption and sound insulation structure is needed to achieve the aims.

Disclosure of Invention

The utility model aims to provide a new energy automobile slide chassis internal and external sound absorption metamaterial damping and sound insulation structure.

The utility model realizes the aim through the following technical scheme:

the utility model provides a new energy automobile slide chassis is inside and outside to inhale sound metamaterial shock attenuation sound insulation structure, includes non-bearing slide chassis, and non-bearing slide chassis corresponds the inside and/or outside of new energy automobile and is provided with sound absorption super structure material board, and sound absorption super structure material board is used as the low frequency noise that arouses by the vibration absorption, alleviates or separates the shock attenuation sound insulation portion of road noise and child noise, forms shock attenuation sound insulation new energy automobile and presumes structure.

Furthermore, the sound absorption super-structure material plate is in a thin plate shape and has small density, so that the light shock absorption and sound insulation body is formed.

Further, the light damping sound insulation body is combined with the non-bearing sliding plate chassis to form a non-bearing damping sound insulation chassis structure.

Further, the sound absorption super-structure material plate setting position includes: the uppermost layer of the non-bearing slide plate chassis of the new energy automobile, or the inside or outside of the alloy plate of the uppermost layer, and the upper surface of the metal plate of the lowermost layer of the chassis.

Further, the sound absorbing metamaterial plate comprises a sequential design structure with internal key physical dimensions, and forms a special composite body with extraordinary acoustic performance which is not possessed by conventional materials or base materials constituting the metamaterial.

Furthermore, the sound absorption super-structure material plate has a series of new acoustic effects of local resonance, sub-wavelength and topological effect, has super-acoustic performance, and forms a high-efficiency sound absorption structure in a wider frequency range under a smaller volume.

Further, the interior of the sound absorption super-structure material plate is in a honeycomb structure.

Furthermore, the sound absorption super-structure material plate is obtained through manual preparation, the structural size unit is smaller than the wavelength of sound waves, the sound absorption super-structure material plate has a strong dispersion effect, the sound loss in the structure is obvious, and a structure for efficiently absorbing and isolating low-frequency noise is formed.

Further, the sound absorption super-structure material plate is arranged on other traditional or non-traditional automobile chassis other than the skateboard chassis, so that a high-universality sound absorption structure is formed.

Furthermore, the sound absorption super-structure material plate is arranged at the position where the vehicle door, the ceiling and the vehicle frame are easy to vibrate, so that the high-efficiency integrated sound absorption vehicle structure is formed.

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

1) The sound insulation type car can run quietly, and the comfort level of driving and sitting is improved.

2) Noise pollution of the space in the vehicle is eliminated, and the largest automobile noise source is isolated: road tire noise.

3) The automobile chassis sound absorption super-structure material vibration and sound insulation plate noise reduction is cheaper than the acoustic active noise reduction technology of the loudspeaker in the automobile, and the effect is better.

4) The technology is most suitable for new energy electric automobiles, further reduces noise in the automobiles and improves riding comfort.

Drawings

Fig. 1 is a schematic diagram of the structure of the present utility model.

FIG. 2 is a second schematic structural view of the present utility model.

Fig. 3 is a structural scan schematic of a sound absorbing metamaterial slab of the present utility model.

Detailed Description

The method for solving the road noise and sound insulation problem of the space in the modern automobile is to adopt a method of externally adding a sound absorption super-structure material vibration absorption and sound insulation plate in the chassis of the sliding plate.

The sound insulation and noise elimination of the automobile can be realized by filling the automobile body and the interior trim with sound insulation materials, so that the noise can be prevented from penetrating the automobile body. This is also called a passive noise cancellation method. The method for passively insulating the sound absorbing material in the vehicle is generally effective for medium-high frequency noise and ineffective for low-frequency vibration. Because bass sound insulation requires a thick and heavy sound insulation material, the weight and thickness of the automobile are increased. Bass vibrations, in particular the sound of car tires and road friction, still penetrate through the car chassis. Becomes the first source of noise in automobiles.

Aiming at the characteristics of the automobile chassis, particularly the popular non-bearing slide plate chassis structure of the new energy automobile, the embodiment provides a novel road noise isolation method, and the novel sound absorption super-structure material plate is added inside and/or outside the automobile slide plate chassis to absorb low-frequency noise caused by vibration, so that the purposes of reducing or isolating road noise and tire noise are achieved. Due to the characteristics of light and thin acoustic super-structure materials, the defects of the traditional acoustic bag are overcome, and a brand new efficient and feasible solution for reducing road noise is provided.

Referring to fig. 1-3, an internal and external sound absorption metamaterial vibration absorption and insulation structure for a new energy automobile skateboard chassis comprises a non-bearing skateboard chassis 100, wherein sound absorption metamaterial plates 200 are arranged in and/or outside the non-bearing skateboard chassis 100 corresponding to the new energy automobile, and the sound absorption metamaterial plates 200 are used for absorbing low-frequency noise caused by vibration, and reducing or isolating road noise and tire noise to form a vibration absorption and insulation new energy automobile setting structure.

The sound absorbing super structure material plate 200 is thin plate-shaped and has a small density, forming a light shock absorbing and sound insulating body.

The light damping sound insulation body is combined with the non-bearing skateboard chassis to form a non-bearing damping sound insulation chassis structure.

The method of providing the sound absorbing super structure material plate 200 acts on the uppermost metal plate of the non-load bearing skateboard chassis 100 of the new energy automobile, or the inside or outside of the alloy plate, and can also be added on the lowermost metal plate of the non-load bearing skateboard chassis 100.

The sound absorbing metamaterial panel 200 is a special composite or structure that is designed to achieve extraordinary acoustic properties that are not possessed by conventional materials or substrates comprising the metamaterial by a sequence of physical dimensions critical to the material. The acoustic super-structure material has a series of new acoustic effects such as local resonance, sub-wavelength and topological effect, has super-normal acoustic performance, and can realize high-efficiency sound absorption within a wider frequency range under a smaller volume.

The non-bearing skateboard chassis 100 is provided with the sound absorption super-structure material plate 200 at a specific position, and the sound absorption super-structure material plate can be additionally arranged at three layer positions, so that the effects of preventing road noise and tire noise from being transmitted into the vehicle through the chassis and preventing the noise from generating resonance in the ground are achieved. Either one plate, or two plates, or three plates together are added at different level locations.

The non-load bearing skateboard chassis 100 is composed of upper and lower metal plates and a structural frame, and the middle interlayer space is often separated into a honeycomb shape, and a battery pack or an electronic control and communication module is placed. In each honeycomb space, the upper and lower layers of steel plates are easy to vibrate along with jolt of automobile tires on a road. The vibration of the uppermost steel plate is blocked, so that low-frequency noise can be prevented from entering the automobile cabin.

The noise wave is generated by striking the metal plate of the non-bearing skateboard chassis 100, so that the metal plate vibrates to transmit noise, and the single-layer plate, the hollow plate, the vacuum plate and the laminated plate vibrate due to the striking of sound waves, and the sound waves are generated by the vibration; therefore, the sound absorption super-structure material plate 200 is filled in the adjacent layer of the vibration plate, so that the conduction of low-frequency sound waves generated by the vibration of the metal plate can be effectively restrained, and the low-frequency noise generated by the vibration can be blocked and absorbed.

The sound absorption super-structure material plate 200 can be additionally arranged on the inner layer of the bottom metal plate of the non-bearing skateboard chassis 100, so that low-frequency noise generated by vibration of the bottom metal plate of the non-bearing skateboard chassis 100 can be absorbed to be continuously transmitted into the vehicle and the non-bearing skateboard chassis 100.

The sound absorption super-structure material plate 200 can be additionally arranged below the upper metal plate of the non-bearing skateboard chassis 100, so that low-frequency noise generated by vibration of the non-bearing skateboard chassis 100 can be absorbed and continuously transmitted to the upper metal plate of the non-bearing skateboard chassis 100.

In both positions, the sound absorbing super structure material plate 200 is added inside the non-load bearing skateboard chassis 100 and exists as a whole of the non-load bearing skateboard chassis 100.

The sound absorption super-structure material plate 200 can be additionally arranged on the upper layer of the upper layer metal plate of the non-bearing skateboard chassis 100 to absorb and block low-frequency noise generated by vibration of the upper layer metal plate of the non-bearing skateboard chassis 100, and the low-frequency noise can be continuously conducted into the automobile.

The sound absorbing super-structure material plate 200 can be additionally arranged at any one of the three positions; alternatively, the sound absorbing metamaterial plate 200 can be added at any two of the above three positions; we can also add sound absorbing metamaterial plates 200 at all three locations.

The specific setting location is set according to the engineering application design according to the cost, weight and effect.

The sound insulation performance of the sound absorbing super structure material panel 200 is mainly composed of: the actual thickness of the sheet material, the material of the sheet material and the acoustic reflection absorption properties, most importantly, are determined by the internal honeycomb structure of the super-structured material. The internal structure of the sound absorption super-structure material is that the sound wave is purposefully controlled and modulated when passing through the material by the intentional design of the material structure, so that macroscopic material parameters such as negative elastic modulus and negative refractive index, or wave regulation effect which are not easily obtained in the conventional material are obtained.

The sound absorption super-structure material plate 200 is a composite structure manufactured artificially, and the structural dimension unit is much smaller than the sound wave wavelength, so that the sound absorption super-structure material plate has special properties which are not possessed by many natural materials, has strong dispersion effect, has obvious sound loss in the structure, and can obtain absorption and isolation effects on low-frequency noise by using super-structures which are much smaller than the sound wave wavelength.

The sound absorbing metamaterial panel 200 may also be used in other conventional or non-conventional automotive chassis other than skateboard chassis.

The sound absorbing super structure material plate 200 can also be used for the parts such as a car door, a ceiling, a car frame and the like which are easy to vibrate.

The specific related elements can be summarized as follows:

1) The traditional acoustic package is effective in the sound insulation of middle and high tones, has limited road noise and tire noise effects on low frequency, does not reach the sound insulation effect and needs a thick sound-absorbing material, and the embodiment achieves the sound insulation effect through the light shock absorption partition setting, and reduces the weight increase of the automobile chassis at the same time;

2) The sound absorption and insulation board 200 made of sound absorption super-structure material is arranged at the upper, lower, inner and outer positions of the non-bearing type skateboard chassis 100 to isolate low-frequency road noise and tire noise of the automobile chassis;

3) The type of main noise is subdivided, and a new solution is provided for the road tire noise of the automobile, namely the low-frequency chassis vibration noise which is difficult to eliminate in the past;

4) The non-bearing skateboard chassis 100 may be a single layer, or two or even three layers;

5) The metal plate can be applied to chassis, metal plates or nonmetal plates of automobile roofs, side frames and automobile doors.

Compared with the prior art, the beneficial effects of this embodiment lie in:

What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims

1. The utility model provides a new energy automobile slide chassis inside and outside sound absorption metamaterial shock attenuation sound insulation structure which characterized in that: the novel energy automobile setting structure comprises a non-bearing slide plate chassis, wherein sound absorption super-structure material plates are arranged inside and/or outside the non-bearing slide plate chassis corresponding to a novel energy automobile and used for absorbing low-frequency noise caused by vibration, and damping and sound insulation parts for reducing or insulating road noise and tire noise are formed.

2. The new energy automobile skateboard chassis internal and external sound absorption metamaterial damping sound insulation structure according to claim 1, wherein the structure is characterized in that: the sound absorption super-structure material plate is in a thin plate shape.

3. The new energy automobile skateboard chassis internal and external sound absorption metamaterial damping sound insulation structure according to claim 2, wherein the structure is characterized in that: the sound absorption super structure material board sets up the position and includes: the uppermost layer of the non-bearing slide plate chassis of the new energy automobile, or the inside or outside of the alloy plate of the uppermost layer, and the upper surface of the metal plate of the lowermost layer of the chassis.

4. The new energy automobile skateboard chassis internal and external sound absorption metamaterial damping sound insulation structure according to claim 3, wherein: the interior of the sound absorption super-structure material plate is in a honeycomb structure.

5. The new energy automobile skateboard chassis internal and external sound absorption metamaterial damping sound insulation structure according to claim 4, wherein: the sound absorption super-structure material plate is arranged on other traditional or non-traditional automobile chassis except the skateboard chassis, so that a high-universality sound absorption structure is formed.

6. The new energy automobile skateboard chassis internal and external sound absorption metamaterial damping sound insulation structure according to claim 1 or 5, wherein: the sound absorption super-structure material plate is arranged at the position where the vehicle door, the ceiling and the vehicle frame are easy to vibrate, so that the high-efficiency integrated sound absorption vehicle structure is formed.