CN214929476U - Noise reduction system for motor cabin of new energy vehicle - Google Patents

Abstract

The utility model discloses a new forms of energy car motor compartment noise reduction system, it includes the motor cabin and falls the cavity of making an uproar, the motor cabin sets up in falling the cavity of making an uproar, fall the cavity of making an uproar and include that the top falls the board of making an uproar, fall the board of making an uproar in the bottom, two side direction fall the board of making an uproar and before enclose the board of making an uproar, the board of making an uproar all standing sets up outside the top surface of motor cabin in the top, fall the board of making an uproar all standing and set up outside the bottom surface of motor cabin in the bottom, two side direction fall the board of making an uproar all standing and set up outside the face of motor cabin with all standing, before enclose and fall the board of making an uproar all standing and set up outside the front of motor cabin. The noise reduction system for the motor cabin of the new energy vehicle has the advantages that the total noise reduction area is larger, the noise reduction amount is larger, and the noise reduction performance is higher; in addition, the system has a relatively simple structure, low requirements on manufacturing and installation processes and is easier to realize in terms of manufacturing processes.

Description

Noise reduction system for motor cabin of new energy vehicle

Technical Field

The utility model belongs to the technology of making an uproar falls in the new forms of energy car especially relates to a new forms of energy car motor compartment noise reduction system.

Background

With the gradual deterioration of global environment, the major countries and economic bodies in the world aim at carbon neutralization, and a plurality of related policies are promulgated, wherein new energy vehicles become the development direction in the aspect of automobiles. People often think that new energy vehicles are quieter than traditional fuel vehicles, which is not true. Compared with the traditional fuel vehicle, the new energy vehicle is additionally provided with the motor, the masking effect of the internal combustion engine is avoided, the high-frequency noise of the motor is particularly prominent, and the auditory sensation is more harsh and annoying.

In order to create a more comfortable ride environment for consumers, various major host plants have taken some measure in noise control. Among them, the acoustic package is one of the control methods for effectively reducing the transmission of noise from the sound source to the inside of the vehicle, and has been used in the conventional fuel vehicle.

Referring to fig. 1, fig. 1 is a schematic diagram of an inner space and an outer space of a new energy vehicle in the prior art. The new forms of energy car includes passenger cabin 1 and motor compartment 2, is provided with motor 3 in the motor compartment 2, and motor 3 and other annex in the motor compartment 2 can produce the noise, through enclosing panel beating 4 transmission to passenger cabin 1 before, bring annoying impression for the passenger. The acoustic package is arranged, so that noise in the passenger compartment 1 of the new energy vehicle can be effectively reduced, and the noise of the motor compartment 2 can be controlled.

At present, the acoustic package scheme of the new energy vehicle mostly adopts the scheme of the traditional fuel vehicle. In addition, some host computer factories can carry out cladding to the motor that is one of the main sound source of new forms of energy car increase acoustics package, has certain effect of making an uproar of falling. When the automobile acoustic bag is proposed, the sound absorption performance and the sound insulation performance of the scheme are generally considered. When a motor which is one of main sound sources of a new energy vehicle is subjected to acoustic coating, the space requirements on heat dissipation and pipeline connection are considered, 100% of coverage area cannot be guaranteed, and the coverage area can only reach 60% -80%. This will tend to affect the overall noise reduction.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a new forms of energy car motor cabinet noise reduction system to there is the poor problem of noise reduction effect in solving prior art new forms of energy car.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a new energy automobile motor compartment noise reduction system, its includes the motor cabin and falls the cavity of making an uproar, the motor cabin set up in fall the cavity of making an uproar, wherein, fall the cavity of making an uproar including the top fall the board of making an uproar, fall the board of making an uproar bottom, two side direction fall the board of making an uproar and before enclose and fall the board of making an uproar, fall the board of making an uproar bottom set up with full coverage outside the top surface of motor cabin, two side direction fall the board of making an uproar full coverage set up in outside the both sides face of motor cabin, before enclose fall the board of making an uproar full coverage set up in outside the front of motor cabin.

In particular, the top noise reduction plate adopts either or both of an automobile interior sound insulation pad or an automobile interior sound absorption pad.

In particular, the bottom noise reduction plate adopts any one or two of an automobile interior sound insulation pad or an automobile interior sound absorption pad.

In particular, the lateral noise reduction plate adopts either or both of an automobile interior sound insulation pad or an automobile interior sound absorption pad.

In particular, the front wall noise reduction plate adopts any one or two of an automobile interior sound insulation pad or an automobile interior sound absorption pad.

Particularly, the top noise reduction plate and the front wall noise reduction plate are assembled on a metal plate of the new energy automobile through buckles.

Particularly, the bottom noise reduction plate is integrated on a bottom guard plate of the new energy automobile, and the lateral noise reduction plate is attached to the back face of an outer wheel arc cover of the new energy automobile.

The beneficial effects of the utility model are that, compare with prior art new forms of energy car motor compartment noise reduction system has following advantage:

1) the motor cabin of the new energy vehicle is regarded as a whole, a high-noise-reduction motor cabin ornament system is constructed, all parts in the system have high noise reduction performance in terms of acoustic performance, and high-frequency noise of the motor cabin can be effectively reduced. Compared with the existing motor coating scheme, the motor coating scheme has the advantages that the total noise reduction area is larger, the noise reduction amount is larger, and the performance is better.

2) From manufacturing process, for the motor cladding piece that the structure is complicated, the utility model provides a motor cabin gadget system structure of high sound of inhaling is simple relatively, and manufacturing and installation technological requirement are low, realize more easily.

Drawings

FIG. 1 is a schematic diagram of the inner and outer spaces of a new energy vehicle in the prior art;

fig. 2 is a schematic perspective view of a noise reduction system of a new energy vehicle motor compartment according to an embodiment of the present invention;

fig. 3 is a sound pressure level curve of motor noise in a simulation prediction model of the noise reduction system of the motor compartment of the new energy vehicle according to the embodiment of the present invention;

fig. 4 is a sound absorption coefficient of a material scheme in a simulation prediction model of the noise reduction system of the new energy vehicle motor compartment according to the embodiment of the present invention;

fig. 5 is an acoustic effect prediction diagram of the noise reduction system of the electric motor compartment of the new energy vehicle provided by the embodiment of the present invention.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 2 to 5, in the present embodiment, the noise reduction system for a new energy vehicle motor compartment includes a motor compartment 2 and a noise reduction cavity 5, the motor compartment 2 is disposed in the noise reduction cavity 5 as a whole, and the noise reduction cavity 5 includes a top noise reduction plate 6, a bottom noise reduction plate 7, two lateral noise reduction plates 8, and a front wall noise reduction plate 9.

Fall the board 6 full coverage ground of making an uproar and set up outside the top surface of motor cabin 2, fall the board 6 of making an uproar on the top and assemble on new energy automobile's panel beating through the buckle, fall the material selection of the board 6 of making an uproar on the top and mainly include following three kinds: firstly, materials mainly used for sound insulation are adopted: a combination of a heavy layer (EPDM, EVA, TPO, etc.), a heavy layer (EPDM, EVA, TPO, etc.) + a decoupling layer (felt, PU foam, etc.); secondly, materials with sound absorption as main materials are adopted: sound absorbing cotton, felt, PU, etc.; thirdly, materials for absorbing and insulating sound: a combination of a hard layer and a soft layer (a variable density structure), a combination of a surface layer (felt, sound absorbing cotton, etc.) + a heavy layer (EPDM, EVA, TPO, etc.) + a decoupling layer (felt, PU foam, etc.).

Fall board 7 of making an uproar bottom and set up outside the bottom surface of motor cabin 2 with covering entirely, fall board 7 of making an uproar bottom and integrate on new energy automobile's end backplate, paste on end backplate or direct compound on end backplate through the adhesive, fall the material selection of board 7 of making an uproar bottom and mainly include following three kinds: firstly, materials mainly used for sound insulation are adopted: a combination of a heavy layer (EPDM, EVA, TPO, etc.), a heavy layer (EPDM, EVA, TPO, etc.) + a decoupling layer (felt, PU foam, etc.); secondly, materials with sound absorption as main materials are adopted: sound absorbing cotton, felt, PU, etc.; thirdly, materials for absorbing and insulating sound: a combination of a hard layer and a soft layer (a variable density structure), a combination of a surface layer (felt, sound absorbing cotton, etc.) + a heavy layer (EPDM, EVA, TPO, etc.) + a decoupling layer (felt, PU foam, etc.).

Two side direction fall the board 8 of making an uproar and set up outside the both sides face of motor cabin 2 with full coverage, and the board 8 of making an uproar pastes in new energy automobile's foreign steamer arc back of falling, and the material selection of the board 8 of making an uproar of making a lateral fall mainly includes following three kinds: firstly, materials mainly used for sound insulation are adopted: a combination of a heavy layer (EPDM, EVA, TPO, etc.), a heavy layer (EPDM, EVA, TPO, etc.) + a decoupling layer (felt, PU foam, etc.); secondly, materials with sound absorption as main materials are adopted: sound absorbing cotton, felt, PU, etc.; thirdly, materials for absorbing and insulating sound: a combination of a hard layer and a soft layer (a variable density structure), a combination of a surface layer (felt, sound absorbing cotton, etc.) + a heavy layer (EPDM, EVA, TPO, etc.) + a decoupling layer (felt, PU foam, etc.).

Enclose before and fall board 9 and set up outside the front of motor cabin 2 with covering totally, enclose before and fall board 9 of making an uproar and assemble in new energy automobile's panel beating through the buckle on, before enclose and fall the material selection of board 9 of making an uproar and mainly include following three kinds: firstly, materials mainly used for sound insulation are adopted: a combination of a heavy layer (EPDM, EVA, TPO, etc.), a heavy layer (EPDM, EVA, TPO, etc.) + a decoupling layer (felt, PU foam, etc.); secondly, materials with sound absorption as main materials are adopted: sound absorbing cotton, felt, PU, etc.; thirdly, materials for absorbing and insulating sound: a combination of a hard layer and a soft layer (a variable density structure), a combination of a surface layer (felt, sound absorbing cotton, etc.) + a heavy layer (EPDM, EVA, TPO, etc.) + a decoupling layer (felt, PU foam, etc.).

Fig. 3 is a sound pressure level curve of motor noise set in the simulation prediction model. FIG. 4 is an acoustic absorption coefficient for a material scheme employed in a simulation prediction model. Fig. 5 shows the result of predicting the noise in the passenger compartment of the motor compartment decoration system with or without high sound absorption when only the motor noise is considered in the same vehicle model. The results show that the scheme adopting the motor cabin noise reduction system has obvious noise reduction effect in the middle and high frequency bands.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (7)

1. The utility model provides a new energy automobile motor compartment noise reduction system, its characterized in that, it includes the motor cabin and falls the cavity of making an uproar, the motor cabin set up in fall the cavity of making an uproar, fall the cavity of making an uproar and include that the board falls the board of making an uproar, fall the board of making an uproar bottom, two side directions fall the board of making an uproar and before enclose and fall the board of making an uproar, fall the board of making an uproar bottom set up with full coverage outside the bottom surface of motor cabin, two side directions fall the board of making an uproar set up with full coverage outside the both sides face of motor cabin, before enclose and fall the board of making an uproar set up with full coverage outside the front of motor cabin.

2. The noise reduction system of the electric motor cabin of the new energy vehicle as claimed in claim 1, wherein the top noise reduction plate is one or two of an automotive interior sound insulation pad and an automotive interior sound absorption pad.

3. The noise reduction system of the electric motor cabin of the new energy vehicle as claimed in claim 1, wherein the bottom noise reduction plate is one or a combination of an automotive interior sound insulation pad and an automotive interior sound absorption pad.

4. The noise reduction system of the electric motor cabin of the new energy vehicle as claimed in claim 1, wherein the lateral noise reduction plate is one or two of an automotive interior sound insulation pad and an automotive interior sound absorption pad.

5. The system of claim 1, wherein the cowl noise reduction panel is one or more of an automotive interior sound insulation pad and an automotive interior sound absorption pad.

6. The noise reduction system for the electric motor cabin of the new energy vehicle as claimed in claim 1, wherein the top noise reduction plate and the front wall noise reduction plate are both assembled on a metal plate of the new energy vehicle through a buckle.

7. The noise reduction system for the electric motor cabin of the new energy vehicle as claimed in claim 1, wherein the bottom noise reduction plate is integrated on a bottom guard plate of the new energy vehicle, and the lateral noise reduction plate is attached to the back surface of an outer arc cover of the new energy vehicle.

Images