CN216833160U

CN216833160U - Back door structure and vehicle

Info

Publication number: CN216833160U
Application number: CN202220767607.2U
Authority: CN
Inventors: 贾艳宾; 岳志强
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-06-28
Anticipated expiration: 2032-04-01

Abstract

The utility model provides a back door structure and vehicle, include back door inner panel, back door planking and the additional plate that stacks the setting in proper order from inside to outside, form first resonant cavity between additional plate and the back door planking, be formed with on the back door planking and correspond a plurality of first resonant opening of intercommunication with first resonant cavity. The utility model discloses utilize resonance noise elimination principle to attenuate in the car acoustic cavity mode, under the prerequisite that does not increase cost weight, promote the noise attenuation performance of back door structure, can effectively improve power assembly, road surface excitation and cause in the car acoustic cavity mode to produce the problem of interior roaring of car, promote driving silence nature and travelling comfort.

Description

Back door structure and vehicle

Technical Field

The utility model belongs to the technical field of vehicle parts, concretely relates to back door structure and vehicle.

Background

With the development of the automobile industry, consumers have higher and higher expectations for the driving comfort of vehicles, the in-vehicle noise is an important index affecting the driving comfort, and whether the in-vehicle noise is controlled in place or not has an important influence on the quality of the vehicles.

One important source of noise in a vehicle is the vibrational excitation of the powertrain and the excitation resulting from the friction of the tires against the road surface, the body of the vehicle as a whole being the ultimate receptor for vibration. The back door in the vehicle body is a large opening and closing member in the vehicle body, and forms a vehicle closed acoustic cavity system with other parts of the vehicle body, so that the vibration of the back door has a large influence on the noise in the vehicle. The existing back door structure can not effectively attenuate the energy generated by the sound cavity mode of the car door, and the sound cavity mode in the car generates the problem of in-car rumbling caused by the excitation of a power assembly and a road surface, so that the problem is not beneficial to controlling the noise in the car.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a back door structure and vehicle aims at realizing the noise elimination design of back door, promotes vehicle back door noise attenuation performance, provides the guarantee for vehicle operation silence nature and travelling comfort.

In order to achieve the above object, the utility model adopts the following technical scheme:

in a first aspect, there is provided a back door structure comprising:

the back door comprises a back door inner plate, a back door outer plate and an additional plate which are sequentially overlapped from inside to outside, wherein a first resonant cavity is formed between the additional plate and the back door outer plate, and a plurality of first resonant openings correspondingly communicated with the first resonant cavity are formed in the back door outer plate.

With reference to the first aspect, in a possible implementation manner, a second resonant opening is formed on the back door inner panel, and the second resonant opening is communicated with the first resonant cavity through the first resonant opening.

With reference to the first aspect, in a possible implementation manner, a plurality of second resonant cavities corresponding to inner sides of the first resonant cavities are formed between the back door inner panel and the back door outer panel, and the first resonant openings and the second resonant openings are respectively communicated with the second resonant cavities;

the total opening area of all the first resonance openings is larger or smaller than the total opening area of all the second resonance openings.

With reference to the first aspect, in one possible implementation manner, the first resonance opening is provided in plurality.

With reference to the first aspect, in one possible implementation manner, the plurality of first resonance openings are symmetrically distributed on left and right sides of the rear door outer panel.

With reference to the first aspect, in one possible implementation manner, the first resonant opening corresponds to an upper portion of the first resonant cavity.

With reference to the first aspect, in one possible implementation manner, the second resonant opening is provided in plurality.

With reference to the first aspect, in one possible implementation manner, a plurality of the second resonance openings are distributed in a row in a width direction of the back door inner panel.

With reference to the first aspect, in one possible implementation manner, the second resonant openings are formed in a plurality of rows in the up-down direction.

Compared with the prior art, the scheme shown in the embodiment of the application, through set up first resonance opening on the back door planking, combine the first resonant cavity that forms between additional plate and the back door planking, utilize resonance noise elimination principle to attenuate in-car acoustic cavity mode, promote the noise attenuation performance of back door structure, can effectively improve power assembly, road surface excitation causes in-car acoustic cavity mode to produce the problem of in-car roaring sound, promote and drive silence nature and travelling comfort.

In a second aspect, the embodiment of the present invention further provides a vehicle, including the above-mentioned back door structure.

Compared with the prior art, the scheme shown in the embodiment of the application has the advantages that the back door structure is adopted, so that noise in the vehicle is effectively suppressed, and the driving comfort level and the quality sense of the vehicle are improved.

Drawings

Fig. 1 is a schematic side view of a back door structure according to an embodiment of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is an exploded view of a back door structure according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of an outer panel of the back door of FIG. 2;

FIG. 6 is a schematic structural view of an inner panel of the back door of FIG. 2;

fig. 7 is a schematic view of the resonance noise elimination principle of the back door structure according to the embodiment of the present invention.

Description of reference numerals:

100. a back door inner panel; 200. a rear door outer panel; 300. an additional plate; 400. a first resonant cavity; 510. a first resonant opening; 520. a second resonant opening; 600. a second resonant cavity; 700. the glass is mounted and left empty.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It should be noted that the term "inner" in the present application refers to a direction toward the passenger compartment, and vice versa refers to "outer"; the term "left and right" refers to the width direction of the outer plate of the back door, and "up and down" refers to the height direction of the outer plate of the back door; the specific directions are indicated in the drawings.

Referring to fig. 1 to 7, a back door structure according to the present invention will be described. The back door structure comprises a back door inner plate 100, a back door outer plate 200 and an additional plate 300 which are sequentially overlapped from inside to outside, wherein a first resonant cavity 400 is formed between the additional plate 300 and the back door outer plate 200, and a plurality of first resonant openings 510 which are correspondingly communicated with the first resonant cavity 400 are formed in the back door outer plate 200.

The back door structure that this embodiment provided, compared with the prior art, through set up first resonance opening 510 on back door planking 200, combine the first resonant cavity 400 that forms between additional board 300 and back door planking 200, utilize resonance noise elimination principle to attenuate in-car acoustic cavity mode, under the prerequisite that does not increase cost weight, promote the noise attenuation performance of back door structure, can effectively improve the power assembly, the problem that interior acoustic cavity mode produced in-car roaring sound is aroused in the road surface excitation, promote driving silence nature and travelling comfort.

As a specific embodiment of the back door outer panel 100 and the back door inner panel 200, a glass installation clearance 700 is formed at upper portions of the back door inner panel 100 and the back door outer panel 200 to implement installation of back door glass, and the additional panel 300 is located below the glass installation clearance 700.

In some embodiments, referring to fig. 1 to 7, a plurality of second resonance openings 520 are formed on the back door inner panel 100, and the second resonance openings 520 communicate with the first resonance cavity 400 through the first resonance openings 510. In this embodiment, the first resonant cavity 400 is communicated with the space in the vehicle through the back door outer plate 200 and the back door inner plate 100, and the purpose of adjusting the absorption frequency of the first resonant cavity more effectively can be achieved by using the coupling relationship between the first resonant cavity 400 and the passenger compartment, so that the effectiveness of resonance noise elimination is improved.

In some embodiments, referring to fig. 1 and 7, a second resonant cavity 600 corresponding to the inner side of the first resonant cavity 400 is formed between the back door inner panel 100 and the back door outer panel 200, and the first resonant opening 510 and the second resonant opening 520 are respectively communicated with the second resonant cavity 600; the total opening area of all the first resonant openings 510 is greater than or less than the total opening area of all the second resonant openings 520.

In this embodiment, the volume of the first resonant cavity 400 is V1, the opening area of the first resonant opening 510 is Sc1, the plate thickness of the back door outer plate 200 is Lc1, the opening area of the second resonant opening 520 is Sc2, the depth of the second resonant cavity 600 in the inward and outward direction is Lc2 (or the plate thickness of the back door inner plate 100 is Lc2), and the volume of the second resonant cavity 60 is V2, and by increasing and decreasing the number and the area of the first resonant opening 510 and the second resonant opening 520, and by designing the total opening area of the back door outer plate 200 and the total opening area of the back door inner plate 100 differently, the resonant opening areas Sc1 and Sc2 corresponding to different frequencies are formed, so that a multi-frequency resonant cavity structure is formed, multi-frequency energy generated by a car interior acoustic cavity mode is attenuated, and then the resonant silencing effect is further enhanced.

The present embodiment is exemplified such that the individual opening area of the first resonant openings 510 is smaller than the individual opening area of the second resonant openings 520, and the total opening area of the first resonant openings 510 is smaller than the total opening area of the second resonant openings 520. Of course, the difference in the area of the individual resonant openings may be that the individual opening area of the first resonant opening 510 is larger than the individual opening area of the second resonant opening 520, or that both are equal; the difference of the total opening area may also be that the total opening area of the first resonant opening 510 is larger than the total opening area of the second resonant opening 520, and for a specific arrangement principle, it is sufficient that the opening area of the inner side is not equal to the opening area of the outer side, and the specific embodiment is not limited herein.

In some embodiments, referring to fig. 4 and 5, in order to further enhance the attenuation of multi-frequency energy, the first resonant opening 510 is provided in a plurality, and the plurality of openings can be distributed at different positions according to specific resonant requirements.

In specific implementation, referring to fig. 4 and 5, in order to ensure the structural strength and the stress uniformity of the back door outer panel 200, a plurality of first resonant openings 510 are exemplarily and symmetrically distributed on the left and right sides of the back door outer panel 200 in this embodiment. It should be understood that the plurality of first resonant openings 510 may be asymmetrically distributed on the rear door outer panel 200; furthermore, the plurality of first resonant openings 510 may be regularly distributed or irregularly distributed, which is only required to balance the resonance and the structural strength, and is not limited herein.

In order to optimize the attenuation capability of multi-frequency energy, referring to fig. 4 and 5, the present embodiment exemplarily makes the first resonance opening 510 correspond to the upper portion of the first resonance cavity 400. It should be understood, however, that the first resonant opening 510 may also correspond to the middle, lower portion, or other position of the first resonant cavity 400, and it is sufficient to satisfy the functional requirement of resonant sound attenuation, and is not limited herein.

In some embodiments, referring to fig. 2-4 and 6, in order to further enhance the attenuation of multi-frequency energy, the second resonant opening 520 is provided with a plurality of openings, which may be distributed at different positions according to specific resonant requirements.

Specifically, referring to fig. 2 to 4 and 6, in order to optimize the distribution mode of the second resonance openings 520 and enhance the acoustic cavity modal attenuation capability, a plurality of the second resonance openings 520 are distributed in a row in the width direction of the back door inner panel 100.

More specifically, the second resonant openings 520 are disposed offset from the first resonant openings 510 in the front-to-rear direction.

More specifically, referring to fig. 2 to 4 and 6, the second resonant openings 520 are formed in a plurality of rows in the up-down direction. The exemplary embodiment divides the plurality of second resonant openings 520 into two upper and lower rows, wherein only one second resonant opening 520 is disposed in the upper row, three second resonant openings 520 are disposed in the lower row, and the plurality of second resonant openings 520 are substantially mirror-symmetrically distributed along the centerline of the back door inner panel 100. However, the distribution of the second resonant openings 520 is not limited to the above exemplary manner, and the performance requirement of resonant sound attenuation and the setting requirement of structural strength can be satisfied, which is not listed here.

In some embodiments, the number of the first resonant openings 510 may be equal to or different from the number of the second resonant openings 520, which is not limited herein. In the present embodiment, the number of the first resonant openings 510 is exemplarily set to two, and the number of the second resonant openings 520 is exemplarily set to four, as shown in fig. 4 to 6.

In some embodiments, referring to fig. 1 to 4, the additional plate 300 is a bent plate body protruding outward, so that the first resonant cavity 400 has a triangular cross section in the left-right direction. According to the embodiment, the additional plate 300 forms a triangular structure, and the characteristics of strong stability and high strength of the triangular structure are utilized, so that the strength of the additional plate 300 is improved, the integral strength of the back door structure is improved, the back door structure has better vibration attenuation capability, and the noise intensity in a vehicle is reduced; meanwhile, the design of the additional plate 300 can also increase cross-country elements, motion elements and the like for the back door, so that the attractiveness of the vehicle is enhanced, and the requirements of users are more fitted in appearance.

It should be understood that the protruding position of the additional plate 300 may be located at the upper part, the lower part or the middle part of the additional plate 200, and is set according to the structure and appearance requirements, and is not limited herein.

In some embodiments, referring to fig. 4, a reinforcing support member is further disposed in the first resonant cavity 400, and is supported between the back door outer plate 100 and the additional plate 300, so that structural strength can be provided between the additional plate 300 and the back door outer plate 100, and the structural strength and rigidity of the whole back door structure can be further improved, thereby promoting the vibration attenuation performance of the back door assembly.

Based on the same inventive concept, the embodiment of the application also provides a vehicle, which comprises the back door structure.

Compared with the prior art, the vehicle provided by the embodiment has the advantages that the noise in the vehicle is effectively inhibited, and the driving comfort level and the texture of the vehicle are improved by adopting the back door structure.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A back door structure, comprising:

2. A back door structure according to claim 1, wherein a plurality of second resonance openings are formed in the back door inner panel, and the second resonance openings communicate with the first resonance chamber through the first resonance openings.

3. The back door structure as claimed in claim 2, wherein a second resonance cavity corresponding to an inner side of the first resonance cavity is formed between the back door inner plate and the back door outer plate, and the first resonance opening and the second resonance opening are respectively communicated with the second resonance cavity;

4. A back door structure according to claim 3, wherein there are a plurality of said first resonant openings.

5. A back door structure according to claim 4, wherein a plurality of the first resonant openings are symmetrically distributed on both left and right sides of the back door outer panel.

6. A back door structure according to claim 4, wherein the first resonant opening corresponds to an upper portion of the first resonant cavity.

7. A back door structure according to claim 3, wherein there are a plurality of said second resonant openings.

8. A back door structure according to claim 7, wherein a plurality of the second resonance openings are distributed in a row in a width direction of the back door inner panel.

9. A back door structure according to claim 8, wherein the second resonance openings are formed in a plurality of rows in an up-down direction.

10. A vehicle comprising a back door structure as claimed in any one of claims 1 to 9.