CN216833439U - Combined type sealing sound insulation structure, rearview mirror assembly and vehicle - Google Patents

Abstract

The utility model provides a combined sealing sound insulation structure, a rearview mirror assembly and a vehicle, which belong to the technical field of vehicles, and comprise a first sound insulator and a second sound insulator, wherein the first sound insulator is provided with a first step surface and a first following surface which is covered on a rearview mirror framework in a following way; the second sound insulator is provided with a second step surface lapped with the first step surface and a second following surface wrapping the rearview mirror framework in a following way; the two ends of the first following-shaped surface and the second following-shaped surface are connected to form a following-shaped hole through which the rearview mirror framework penetrates. According to the combined type sealing sound insulation structure provided by the embodiment, the first sound insulator and the second sound insulator are used for plugging the mounting hole of the rearview mirror framework, the sound insulator which is coated along with the shape can be designed according to the shape of the rearview mirror framework, the gap between the rearview mirror framework and the vehicle door is reliably sealed, and the way of noise transmission is isolated, so that the noise in the vehicle is reduced, and the riding feeling of drivers and passengers is improved; and a step surface lap joint combined structure is adopted, so that the sealing performance is ensured.

Description

Combined type sealing sound insulation structure, rearview mirror assembly and vehicle

Technical Field

The utility model belongs to the technical field of the car, concretely relates to modular sealed sound insulation structure, rear-view mirror assembly and vehicle that have this modular sealed sound insulation structure.

Background

Along with the continuous improvement of living standard, consumers increasingly improve the requirement on the driving comfort of automobiles, and the automobile noise is the problem of the driving comfort of automobiles. When a vehicle runs, air flow passes through a vehicle body to generate turbulence or leakage noise, which is a main reason for generating wind noise, wherein the air flow in the A column area is very complex and the relative speed of the air flow is very high, and a rearview mirror is arranged in the area, so that the rearview mirror becomes one of the largest wind noise parts of the exterior trimming parts of the vehicle body, and the contribution to the noise in the vehicle is very large.

There are three factors affecting the noise of the rearview mirror:

(1) the shape and the geometric structure of the rearview mirror are reasons for generating air flow noise;

(2) the sealing quality of the rearview mirror and the automobile body after installation is the reason for generating leakage noise;

(3) the fitting degree and the assembly precision of the rearview mirror base and the triangular window metal plate are influence factors of noise leakage.

The three points are all required to be scientifically designed, otherwise, a monopole and a broadband wind noise source are easily generated when airflow flows through the rearview mirror area, and then the airflow permeates into the automobile through a gap, so that the wind noise in the automobile is large.

At present, aiming at a rearview mirror arranged on a water cut of a car door, a base of the rearview mirror is provided with a sealing rubber gasket, and a lip edge structure of the sealing rubber gasket is well matched with an outer water cut so as to prevent air flow from entering the car through a gap to form monopole noise; however, the rearview mirror installed at the outer water cut position of the vehicle door is limited in the Z-direction space, so that a rearview mirror framework is exposed, a sealing rubber pad needs to penetrate through an external mirror arm and then is installed on a rearview mirror base, a large-size installation hole exists in the sealing rubber pad of the rearview mirror base, a large non-plugging gap exists between the sealing rubber pad and the rearview mirror framework, and the problems of noise leakage and poor sound insulation effect are caused.

The rear-view mirror is one of the biggest noise sources of the outer convex part of the automobile body, and the sound insulation performance of the rear-view mirror shell is limited, and noise can enter the automobile through the holes of the rear-view mirror shell and the sealing rubber mat, so that the subjective feeling of a driver is influenced, and further the selection of a customer on the automobile type is influenced, and the market competitiveness of an automobile enterprise is influenced.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a modular sealed sound insulation structure, rear-view mirror assembly and vehicle aims at reducing the influence of rear-view mirror noise source in the car, improves the effect of making an uproar falls in the sound insulation.

In order to achieve the above object, the present invention adopts the following technical solutions: the utility model provides a modular sound insulation structure that seals for seal the gap between rear-view mirror skeleton and door, include:

the first sound insulator is provided with a first step surface and a first following surface which is covered with the rearview mirror framework in a following shape; and

the second sound insulator is provided with a second step surface lapped with the first step surface and a second following surface wrapping the rearview mirror framework in a following shape; the two ends of the first following surface and the second following surface are connected to form a following hole through which the rearview mirror framework penetrates.

With reference to the first aspect, in a possible implementation manner, the first sound insulator includes a sound absorption layer for attaching the rearview mirror framework to the vehicle door, and a mass layer coated on an exposed surface of the sound absorption layer.

With reference to the first aspect, in one possible implementation manner, the thickness of the mass layer is 1-2 mm.

With reference to the first aspect, in a possible implementation manner, the first sound insulator includes a first support portion attached to the vehicle door, and the thickness of the first support portion is 8-20 mm.

With reference to the first aspect, in a possible implementation manner, the first sound insulator further includes a first inserting portion integrally formed with the first supporting portion, and the first conformal surface is located on the first inserting portion.

With reference to the first aspect, in one possible implementation manner, the second sound insulator is made of a sound absorbing material.

With reference to the first aspect, in one possible implementation manner, the second sound insulator includes a second support portion attached to the vehicle door, and the thickness of the second support portion is 10 to 20 mm.

With reference to the first aspect, in a possible implementation manner, the second sound insulator further includes a second insertion portion integrally formed with the second support portion, and the second conformal surface is located on the second insertion portion.

In a second aspect, the embodiment of the present invention further provides a rearview mirror assembly, including the combined sealed sound insulation structure.

The utility model provides a sound insulation structure and rear-view mirror assembly are sealed to combination formula compares with prior art, and beneficial effect lies in: by adopting the combined sound insulation structure, the sound insulator coated along with the shape can be designed according to the shape of the rearview mirror framework, the gap between the rearview mirror framework and the vehicle door is reliably sealed, and the way of noise transmission is isolated, so that the noise in the vehicle is reduced, and the riding feeling of drivers and passengers is improved. The embodiment of the utility model provides a third aspect still provides a vehicle, including rear-view mirror skeleton, door and the sealed sound insulation structure of combination formula.

The utility model provides a vehicle owing to adopted this kind of modular sealed sound insulation structure, can reduce the interior noise of car, improves the quality of whole car to can improve the market competition of whole car.

Drawings

Fig. 1 is a schematic structural diagram of a combined sealing sound insulation structure provided by an embodiment of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic view of a split structure of a combined sealing sound insulation structure provided by an embodiment of the present invention;

fig. 4 is a schematic view of an installation structure of a combined type sealing sound insulation structure provided by an embodiment of the present invention;

FIG. 5 is an exploded view of the door and mirror frame of the vehicle provided in FIG. 4;

FIG. 6 is an exploded view of the mounting structure of the combined sealed sound insulation structure provided in FIG. 4;

FIG. 7 is a schematic rear view of the mounting structure of the combined sealed sound insulation structure provided in FIG. 4;

fig. 8 is a schematic diagram of a noise propagation path using the combined sealed sound insulation structure provided in the present embodiment;

FIG. 9 is a graph of sound transmission loss versus opening;

description of reference numerals:

1. a first sound insulator; 11. a first support section; 12. a first insertion part; 13. a mass layer; 14. a sound absorbing layer; 2. a second sound insulator; 21. a second support portion; 22. a second insertion part; 23. a second step surface; 3. a following hole; 4. a vehicle door; 41. mounting holes; 5. a rearview mirror frame; 6. a source of noise.

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 merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to fig. 3, a combined sealing and sound insulation structure according to the present invention will be described. Sealed sound insulation structure of combination formula for seal the gap between rear-view mirror skeleton and door, include: the sound insulation structure comprises a first sound insulator 1 and a second sound insulator 2, wherein the first sound insulator 1 is provided with a first step surface and a first following surface which covers a rearview mirror framework 5 in a following manner; the second sound insulator 2 is provided with a second step surface 23 lapped with the first step surface and a second following surface which covers the rearview mirror framework 5 in a following shape; the two ends of the first following surface and the second following surface are connected to form a following hole 3 through which a rearview mirror framework 5 passes.

According to the combined type sealing sound insulation structure provided by the embodiment, the first sound insulator 1 and the second sound insulator 2 are used for plugging the mounting hole 41 of the rearview mirror framework 5 on the vehicle door 4, the first sound insulator 1 and the second sound insulator 2 which are coated in a shape-following manner can be designed according to the shape of the rearview mirror framework 5, the gap between the rearview mirror framework 5 and the vehicle door 4 is reliably sealed, and the way of noise transmission is isolated, so that the noise in the vehicle is reduced, and the riding feeling of drivers and passengers is improved; first sound insulator 1 and second sound insulator 2 adopt the cooperation of side ladder, can guarantee the lapped good nature of side, prevent that the noise from getting into from the side to guarantee sealed good nature.

In some embodiments, referring to fig. 8, first sound insulator 1 includes sound absorbing layer 14 for attaching mirror housing 5 to door 4, and mass layer 13 covering an exposed surface of sound absorbing layer 14. The frequency of a noise source in the rearview mirror area belongs to high-frequency noise, and both sound absorption and sound insulation are required; one side close to the door 4 adopts the sound absorbing layer 14, and the sound absorbing layer 14 adopts porous material or fiber material, through the interference joint of soft elastic sound absorbing layer 14 and rear-view mirror skeleton 5, realizes reliable sealed, keeps away from the greater quality layer 13 of density for the exposed surface of door 4, plays the effect of sound insulation, inhales the cooperation of sound and sound insulation, guarantees the good performance of sealed sound insulation. The first conformal surface of the first sound insulator 1 of the embodiment is wrapped on the rearview mirror framework 5 in a conformal manner, a sound absorption layer is adopted on one side close to the vehicle door, a quality layer is adopted on the exposed surface far away from the vehicle door, and good sealing, sound absorption and sound insulation effects are achieved for the installation position of the rearview mirror.

In some embodiments, the mass layer, i.e. the heavy coating, refers to a material with a relatively high bulk density in the sound insulation structure, and mainly plays a role in sound insulation, wherein the commonly used mass layer is an EVA material (Ethylene-vinyl acetate copolymer and rubber-plastic foam material made of the same) and an EPDM (Ethylene Propylene Diene Monomer, which is a copolymer of Ethylene, Propylene and a small amount of non-conjugated Diene). In this embodiment, the mass layer 13 has a thickness of 1mm to 2mm and a density of 1700 grams per square meter to 2300 grams per square meter. The mass layer 13 has higher density than the sound absorption layer 14, has certain strength and can play a good sound insulation effect.

In some embodiments, referring to fig. 3, first sound insulator 1 includes a first support 11 abutting door 4, first support 11 having a thickness of 8mm to 20 mm. The first support portion 11 and the door 4 are joined to each other, thereby achieving a good sealing effect.

As shown in fig. 1 to 4, when a first sound insulator 1 and a second sound insulator 2 are installed, the first sound insulator 1 is inserted downward into the upper side of a rearview mirror framework 5, the second sound insulator 2 is inserted downward into the lower side of the rearview mirror framework 5, and the overlapping portion of the second sound insulator 2 is located on the inner side of the overlapping portion of the first sound insulator 1. The present embodiment is described below with reference to the second support portion 21 provided in the second sound insulator 1: first supporting part 11 and second supporting part 21 all paste with door 4 mutually, play the effect of support, and the both ends of first supporting part 11 and the mutual overlap joint in both ends of second supporting part 21 correspondingly, first step face sets up the both ends at first supporting part 11, and the second step face sets up the both ends at second supporting part 21.

In some embodiments, referring to fig. 3, first sound insulator 1 further includes a first socket 12 integrally formed with first supporting portion 11, and the first following surface is located on first socket 12. The structure of the insertion part is not limited in this embodiment because the shape of the insertion part needs to be designed after the mirror frame 5, and is not limited to the structural shape shown in the figure.

Note that, the first sound insulator 1 is named from a structure on a propagation path because it is a layered structure having sound absorption and sound insulation, and the above embodiment is named according to the mounting structure of the first sound insulator 1 for the convenience of description of the structure.

As shown in fig. 1 to 3, the first sound insulator 1 having the sound absorbing layer 14 and the mass layer 13 is a sound absorbing material, and the second sound insulator 2 is a sound absorbing material. Specifically, the second sound insulator 2 is made of a porous or fibrous material. The embodiment considers the outer rearview mirror broadband sound insulation source control of a monopole noise source generated by rearview mirror leakage; through the optimized combination of the materials of the sound insulator, the noise transmission path from the rearview mirror to the interior of the vehicle is optimized, and the transmission of the broadband wind noise generated by the rearview mirror to the interior of the vehicle is reduced; each sound insulator is clamped on the rearview mirror framework 5 through self interference, other mounting points or mounting structures are not needed, the manufacturing cost is low, and the mounting is simple and convenient; can satisfy the requirement of rear-view mirror installation area sealing and sound insulation and absorption performance, avoid the regional wind noise of rear-view mirror installation to directly enter into door plant cavity through the through hole of rear-view mirror casing and rear-view mirror skeleton 5, and then transmit the problem in the car. In some embodiments, referring to fig. 3, second insulator 2 comprises a second support 21 abutting door 4, second support 21 having a thickness of 10mm to 20 mm. The lap joint formed by the support part with a certain thickness and the vehicle door 4 can play a good sealing effect.

In some embodiments, referring to fig. 3, second sound insulator 2 further comprises a second socket 22 integrally formed with second support 21, and the second following surface is located on second socket 22. Similarly, the structure of the insertion part is not limited in this embodiment because the shape of the insertion part needs to be designed after the mirror frame 5, and is not limited to the structural shape shown in the drawings.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

It should be noted that the following surfaces or the insertion parts of the first sound insulator 1 and the second sound insulator 2 provided in the drawings of the present embodiment are designed based on the fact that the rearview mirror is installed at the water cut part of the vehicle door, but the combined sealing sound insulation structure and the matching manner of sound absorption and sound insulation can be applied to other sealing parts of the rearview mirror, and the sealing sound insulation structure provided in the present embodiment is applicable to all vehicle types.

Based on the same inventive concept, as shown in fig. 4 to 7, the embodiment of the present application further provides a rearview mirror assembly including the combined type sealed sound insulation structure.

Based on the same inventive concept, as shown in fig. 4 to 8, the embodiment of the present application further provides a vehicle, which includes a rearview mirror frame 5, a vehicle door 4 and the combined sealing sound insulation structure.

As shown in fig. 4 to 8, the first sound insulator 1 is inserted from top to bottom into the upper side of the mirror frame 5, and the second sound insulator 2 is inserted from bottom to top into the lower side of the mirror frame 5.

The utility model provides a vehicle, as shown in FIG. 8, the noise propagation approach is: noise that noise source 6 sent passes through second sound insulator 2, rear-view mirror skeleton 5 and first sound insulator 1, and in the reentrant vehicle, the sealed cushion cooperation of combined type sound insulation structure and rear-view mirror base is good, guarantees the performance of sealed sound insulation, reduces noise in the car, improves the quality of whole car to can improve the market competition of whole car.

In order to illustrate the sealing and sound insulation effects of the present embodiment, the relationship between sound transmission loss and open cell ratio is described in detail, and the relationship between sound transmission loss and open cell ratio is shown in formula (1), and the graph is shown in fig. 9:

the opening rate is as follows: the open area accounts for the entire area ratio.

Find the sound transmission loss as 35dB point on the abscissa, draw a straight line, it intersects with the sound transmission loss curve of different aperture ratio. The sound transmission loss at the aperture ratio of 1%, 2%, 5%, 10%, 20%, etc. was 20dB, 17dB, 12dB, 8dB, 6dB, respectively. The open porosity increases and the sound transmission loss decreases sharply.

Acoustic loss and sealing relationship: when the aperture ratio is 1%, the sound transmission loss is reduced from 35dB to 20dB in an ideal state; if the open porosity is only 0.1%, the sound transmission loss is 24dB, that is, the sound insulation of the structure is designed well, but the sound insulation effect is not as good as that of the sound insulation but the open porosity is low due to the high open porosity.

TL_hole＝-10log[γ+10^-TL/10(1-γ)] (1)

Wherein TL is the sound transmission loss without holes and gaps;

TL_holethe loss of sound transmission when the opening ratio is γ.

As can be seen from the above analysis, although the sealing rubber mat is arranged between the rearview mirror base and the vehicle door 4, the rearview mirror framework 5 cannot be wrapped by the sealing rubber mat, and a large gap exists between the inner hole of the sealing rubber mat and the rearview mirror framework, so that the mounting positions of the rearview mirror and the vehicle door need to be sealed and sound-insulated, and turbulent noise generated by air flow crossing the rearview mirror is blocked and is transmitted into the vehicle through the mounting positions.

The combined type sealing sound insulation structure provided by the embodiment can make up the defects of the sealing rubber mat and prevent the noise generated by the rearview mirror from being transmitted to the interior of the vehicle through the installation position of the rearview mirror.

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 (10)

1. The utility model provides a modular sealed sound insulation structure for gap between sealed rear-view mirror skeleton and door, its characterized in that includes:

the first sound insulator (1) is provided with a first step surface and a first following surface which is covered with the rearview mirror framework (5) in a following way; and

the second sound insulator (2) is provided with a second step surface (23) lapped with the first step surface and a second following surface which covers the rearview mirror framework (5) in a following way; the two ends of the first following surface and the second following surface are connected to form a following hole (3) through which the rearview mirror framework (5) penetrates.

2. The combined type sealing sound insulation structure as claimed in claim 1, wherein the first sound insulator (1) comprises a sound absorption layer (14) for attaching the rearview mirror framework (5) and the vehicle door (4) and a quality layer (13) coated on the exposed surface of the sound absorption layer (14).

3. The combined, sealed acoustical structure of claim 2, wherein the mass layer has a thickness of 1mm to 2 mm.

4. A combined sealed sound-insulating structure according to claim 1, characterised in that said first sound insulator (1) comprises a first support (11) abutting against said vehicle door (4), said first support (11) having a thickness of 8mm to 20 mm.

5. A combined sealed sound-insulating structure according to claim 4, characterised in that the first sound insulator (1) further comprises a first plug part (12) formed integrally with the first support part (11), the first conformal surface being located on the first plug part (12).

6. A combined sealed sound-insulating structure according to claim 1, characterised in that the second sound insulator (2) is of sound-absorbing material.

7. A combined sealed sound-insulating structure according to claim 1, characterised in that the second sound insulator (2) comprises a second support (21) which abuts the vehicle door (4), the second support (21) having a thickness of 10mm-20 mm.

8. A combined sealed sound-insulating structure according to claim 7, characterised in that the second sound insulator (2) further comprises a second spigot portion (22) integrally formed with the second support portion (21), the second conformal surface being located on the second spigot portion (22).

9. A rearview mirror assembly comprising a modular sealed sound insulating structure as claimed in any one of claims 1 to 8.

10. A vehicle, characterized by comprising a rear-view mirror frame (5), a door (4) and a combined sealed sound-insulating structure according to any one of claims 1-8.

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