CN219487567U

CN219487567U - Enclose structure and vehicle before car

Info

Publication number: CN219487567U
Application number: CN202320275843.7U
Authority: CN
Inventors: 米路
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-08-08
Anticipated expiration: 2033-02-21

Abstract

The utility model discloses an automobile front wall structure and an automobile, which comprise a front wall metal plate, wherein the front wall metal plate comprises a front wall metal plate upper end close to a vehicle roof and a front wall metal plate lower end close to a vehicle bottom, the front wall metal plate upper end and/or the front wall metal plate lower end are/is of a double-layer metal plate structure with a cavity, and sound absorbing materials are filled in the cavity. The vehicle comprises the automobile front wall structure. The utility model relates to a technical problem of poor sound insulation performance of a front wall structure in the prior art.

Description

Enclose structure and vehicle before car

Technical Field

The utility model relates to the technical field of automobile vibration noise control, in particular to an automobile front wall structure and an automobile.

Background

In recent years, with the increasing demand of customers for riding comfort of passenger cars, the noise level in the car has become an important direction for improving the product popularity of each car manufacturer.

Because the power system of the whole vehicle is arranged in the engine room, and meanwhile, tyre noise can be generated when the tyre is contacted with the road surface in the running process of the vehicle, the noise generated by the power system and the tyre noise are main noise sources of the vehicle, and the noise of the power system and the noise of the front tyre are closer to the front wall system and can be transmitted into the vehicle through the front wall system. If the sound insulation performance of the front surrounding system is insufficient, the transmission of noise into the vehicle cannot be effectively blocked, the problems of excessive noise in the vehicle and reduced riding comfort are caused, and customer complaints are easily caused. In recent years, new energy automobiles are rapidly developed, noise generated by a power system in a cabin of each new energy automobile is mainly high-frequency and has penetrating power, if the sound insulation performance of a front surrounding system is insufficient, the noise transmitted into the automobile is larger, riding comfort is obviously reduced, and therefore a structural scheme for improving the sound insulation performance of the front surrounding system is urgently needed in the market.

Disclosure of Invention

In view of the above, the utility model aims to provide an automobile front wall structure and an automobile, so as to solve the technical problem that the front wall structure in the prior art is poor in sound insulation performance.

The embodiment of the utility model provides an automobile front wall structure, which comprises a front wall metal plate, wherein the front wall metal plate comprises a front wall metal plate upper end close to a vehicle roof and a front wall metal plate lower end close to a vehicle bottom, the front wall metal plate upper end and/or the front wall metal plate lower end are/is of a double-layer metal plate structure with a cavity, and sound absorbing materials are filled in the cavity.

In some embodiments, the front wall structure of the automobile further comprises inner A-pillar metal plates arranged on two sides of the front wall metal plate, and the double-layer metal plate structure is matched with the inner A-pillar metal plates to form a closed cavity.

In some embodiments, at least one layer of the double-layer sheet metal structure is provided with a filling hole for filling the sound absorbing material.

In some embodiments, the cavity cross section of the cavity is in a quadrilateral shape, and the angles of the inner angles of the quadrilateral are different in size.

In some embodiments, the angle of the internal angle is greater than 40 °.

In some embodiments, the double-layer sheet metal structure comprises a first layer of sheet metal and a second layer of sheet metal which are oppositely arranged along the length direction of the vehicle body, wherein the area of an area formed by surrounding a perpendicular line between the first layer of sheet metal and the second layer of sheet metal is larger than 60% of the area of the quadrangle.

In some embodiments, the double-layer sheet metal structure comprises a first layer of sheet metal and a second layer of sheet metal which are oppositely arranged along the length direction of the vehicle body, and the distance between the first layer of sheet metal and the second layer of sheet metal is 20mm-35mm.

In some embodiments, the sound absorbing material is polyurethane foam.

In some embodiments, the double-layer metal plate structure at the upper end of the front wall metal plate is in sealing connection with the metal plate in the A column through spot welding; and/or the double-layer sheet metal structure at the lower end of the front wall sheet metal is in sealing connection with the floor sheet metal through spot welding.

The embodiment of the utility model also provides a vehicle, which comprises the automobile front wall structure.

According to the automobile front wall structure and the automobile, the upper end and/or the lower end of the front wall sheet metal are/is respectively provided with the double-layer sheet metal structure, and the sound-absorbing material is filled, so that the sound-insulating performance of the upper end and the lower end of the front wall sheet metal is optimized, the double-layer sheet metal and the sheet metal in the A column form a closed quadrilateral cavity through precise spot welding, the sound-insulating performance is greatly improved, meanwhile, noise is reduced through opening holes in the cavity, polyurethane is filled in the cavity for foaming, the sound-insulating performance is further optimized, and through optimizing the design structure of the front wall, the sound-insulating performance of a front wall system is improved, cabin noise entering a cab is reduced, the comfort of passengers is improved, and the requirements of the passengers on the sound quality in the automobile are met.

Drawings

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings illustrate various embodiments by way of example in general and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive of the present apparatus or method. The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic view of an overall structure of a front wall of an automobile according to an embodiment of the present utility model;

FIG. 2 is a schematic view of an upper end structure of a front wall of an automobile according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a Y-direction cross section of a front wall of an automobile according to an embodiment of the utility model;

FIG. 4 is a schematic cross-sectional view of a cavity at the upper end of a front wall of an automobile according to an embodiment of the utility model;

FIG. 5 is a graph showing the effect of improving the sound insulation performance of the upper end structure optimization of the front wall of the automobile in the embodiment of the utility model;

FIG. 6 is a schematic view of a lower end structure of a front wall of an automobile according to an embodiment of the utility model;

FIG. 7 is a schematic cross-sectional view of a cavity at the lower end of a front wall of an automobile according to an embodiment of the utility model;

fig. 8 is a graph showing the effect of improving the sound insulation performance of the lower end structure optimization of the front wall of the automobile in the embodiment of the utility model.

Wherein the above figures include the following reference numerals:

1. sheet metal in the column A; 2. front wall metal plates; 21. the upper end of the front wall sheet metal; 211. a lower sheet metal layer; 212. upper sheet metal; 22. the lower end of the front wall sheet metal; 221. sheet metal is arranged in the lower end of the front wall; 222. the lower end of the front wall is externally protruded with a metal plate; 3. a first round hole; 4. a second round hole; 5. foaming polyurethane; 6. floor panel beating.

Detailed Description

Hereinafter, specific embodiments of the present utility model will be described in detail with reference to the accompanying drawings, but not limiting the utility model.

It should be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the above description should not be taken as limiting, but merely as exemplification of the embodiments. Other modifications within the scope and spirit of the utility model will occur to persons of ordinary skill in the art.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and, together with a general description of the utility model given above, and the detailed description of the embodiments given below, serve to explain the principles of the utility model.

These and other characteristics of the utility model will become apparent from the following description of a preferred form of embodiment, given as a non-limiting example, with reference to the accompanying drawings.

It is also to be understood that, although the utility model has been described with reference to some specific examples, a person skilled in the art will certainly be able to achieve many other equivalent forms of the utility model, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.

The above and other aspects, features and advantages of the present utility model will become more apparent in light of the following detailed description when taken in conjunction with the accompanying drawings.

Specific embodiments of the present utility model will be described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the utility model, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the utility model in unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not intended to be limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present utility model in virtually any appropriately detailed structure.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The specification may use the word "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the utility model.

The utility model will be further described with reference to the drawings and specific examples.

The first embodiment of the utility model provides an automobile front wall structure, as shown in fig. 1, comprising a metal plate 1 and a front wall metal plate 2 in a column a on two sides, wherein one end of the front wall metal plate 2 folded to a roof is a front wall metal plate upper end 21, one end of the front wall metal plate 2 folded to a bottom of the automobile is a front wall metal plate lower end 22, the front wall metal plate upper end 21 and/or the front wall metal plate lower end 22 are/is of a double-layer metal plate structure, the double-layer metal plate structure can improve the sound insulation performance of a front wall system, the double-layer metal plate structure and the metal plate 1 in the column a respectively form a closed cavity, sound absorbing materials are filled in the closed cavity, preferably, the sound absorbing materials are polyurethane foam 5, and the density is 80kg/m ³ Cabin noise entering the cab can be reduced, and passenger comfort is improved.

At present, most passenger cars are designed to use 0.7mm front wall metal plates, front wall inner sound insulation pads and front wall outer sound insulation pads, the front wall metal plates are made of steel plates, more mounting brackets are arranged at the inner sides of the upper ends of the front wall metal plates, cabin air chambers are arranged at the outer sides of the front wall metal plates, so that the coverage rate of the front wall inner sound insulation pads and the front wall outer sound insulation pads is very low, and the sound insulation performance of a front wall system is reduced.

In this embodiment, double-deck sheet metal structure includes first layer panel beating and the second floor panel beating that sets up relatively along automobile body length direction, specifically is as shown in fig. 2, enclose panel beating upper end 21's cavity by upper sheet metal 212, lower floor's panel beating 211 and A post in 1 enclose, and confined cavity can promote sound insulation performance, set up on the at least one deck panel beating of double-deck sheet metal structure be used for filling sound absorbing material's filling hole, preferably, first round hole 3 has been seted up to the double-deck panel beating structure equidistance of preceding enclosing panel beating upper end 21, first round hole 3 sets up on double-deck panel beating structure's lower floor's panel beating 211, preferably, and the equidistance is opened six first round holes 3 that the diameter is 20mm on lower floor's panel beating 211, first round hole 3 both can promote sound insulation performance in the cavity of preceding enclosing upper end 21, can be used for filling polyurethane foaming 5 simultaneously.

Further, as shown in fig. 3 and fig. 4, the cross section of the cavity of the closed cavity formed by the upper end 21 of the front panel beating is in a quadrilateral shape, the angles of the inner angles of the quadrilateral are different, and preferably, the panel beating adopts a steel plate with the thickness of more than 0.5mm; as shown in FIG. 4, the length of the vertical line segment is shown as a length of 25 mm.ltoreq.a.ltoreq.b.ltoreq.35 mm; the angle alpha is more than or equal to 45 degrees; the angle beta is more than or equal to 45 degrees; the area of the middle area formed by the vertical line segments a and b accounts for more than 60% of the total area, so that the cavity shape of the upper end 21 of the front wall sheet metal is ensured, the weight cost can be reduced to the greatest extent while the front wall sound insulation performance is improved, and the transition design is avoided, so that the optimal cost performance is formed.

Further, the metal plates in the closed cavity are connected through spot welding, two layers of welding are arranged at the welding positions, and the welding spot interval is 50mm; the overlapping deviation of the plate is controlled within +/-1 mm; the gap between the overlapping surfaces of the plates is not more than 0.5mm; the diameter of the nugget is more than or equal to 5.1mm; and the sound insulation performance of the welding position is ensured.

Further, in the coating stage, the foam gun stretches into the first round hole 3 to spray foam until filling the cavity, and the density of the foam is 60kg/m ³ The method comprises the steps of carrying out a first treatment on the surface of the The rate of spray foaming of the foaming gun is 100g/s; the lowest injection quantity of the foaming gun is 10g; the single injection tolerance of the foaming gun is +/-3 g; the temperature of the foaming material is 30-40 ℃, and if the ambient temperature is not in the range, heating or refrigerating equipment is needed; the outer diameter of the nozzle of the foaming gun is 10mm; ensures that polyurethane foam 5 in the cavity of the upper end 21 of the front wall sheet metal can be lifted to the maximum extentRaise sound insulating performance.

Further, by optimizing the structure of the upper end 21 of the front wall metal plate, the sound insulation performance of the front wall system is greatly improved, and as can be seen from comparison of the sound insulation effects of table 1, after optimization, the sound insulation amount of the front wall system is improved by 0.7-2.3dB in the frequency band of 400-8000Hz, and as can be seen in fig. 5, the sound pressure level of the optimized curve is higher, the sound insulation effect is greatly improved, and therefore noise entering the vehicle is greatly reduced.

Table 1 front wall sheet metal upper end structure optimization sound insulation effect improvement comparison

Further, at present, most passenger cars have front wall lower end metal plates as areas where the front wall inner sound insulation pad and the carpet overlap, the areas are also extension areas of legs of front passengers, and the front wall inner sound insulation pad and the carpet are limited by leg space, especially the carpet is very thin in the areas, and only one layer of carpet blank is usually left without sound absorption materials, so that the sound insulation performance of a front wall system is reduced.

In this embodiment, the double-deck sheet metal structure includes the relative first layer panel beating and the second layer panel beating that set up along automobile body length direction, specifically as shown in fig. 6, enclose the cavity of panel beating lower extreme 22 before by enclose inside panel beating 221 of lower extreme, enclose in the front in lower extreme evagination panel beating 222 and the A post panel beating 1 constitute, set up on the at least one deck panel beating of double-deck sheet metal structure and be used for filling the filling hole of sound absorbing material, preferably, the second round hole 4 has been seted up to the equidistance of double-deck sheet metal structure, the setting of second round hole 4 is on the preceding lower extreme evagination panel beating 222 of double-deck sheet metal structure, preferably, on enclose in the front on the lower extreme evagination panel beating 222 equidistant eight second round holes 4 that the diameter is 10mm, the second round hole 4 both can promote enclose in the cavity of panel beating lower extreme 22 before, can be used for filling polyurethane foaming 5 simultaneously.

Further, as shown in fig. 3 and fig. 7, the cross section of the cavity of the closed cavity formed by the lower end 22 of the front panel beating is in a quadrilateral shape, and the angles of the interior angles of the quadrilateral are different, preferably, as shown in fig. 7, the panel beating adopts a steel plate with the thickness of more than 0.5mm; the lengths of the illustrated vertical segments c and d satisfy: c is more than or equal to 20mm and d is more than or equal to 30mm; the angle gamma is more than or equal to 40 degrees; the angle delta is more than or equal to 40 degrees; the area of the middle area formed by the vertical line segments c and d accounts for more than 60% of the total area, and the cavity shape of the lower end 22 of the front wall sheet metal is set according to the conditions, so that the weight cost can be reduced to the greatest extent while the front wall sound insulation performance is improved, the transition design is avoided, and the optimal cost performance is formed.

Further, in the coating stage, the foaming gun stretches into the second round hole 4 to spray and foam until the cavity is filled, and the density of the foam is 60kg/m ³ The method comprises the steps of carrying out a first treatment on the surface of the The rate of spray foaming of the foaming gun is 100g/s; the lowest injection quantity of the foaming gun is 10g; the single injection tolerance of the foaming gun is +/-3 g; the temperature of the foaming material is 30-40 ℃, and if the ambient temperature is not in the range, heating or refrigerating equipment is needed; the outer diameter of the nozzle of the foaming gun is 10mm; the polyurethane foam 5 in the cavity of the lower end 22 of the front wall sheet metal can be guaranteed to improve the sound insulation performance to the greatest extent.

Further, by optimizing the structure of the lower end 22 of the front wall sheet metal, the sound insulation performance of the front wall system is greatly improved, specifically, as can be seen from comparison of the sound insulation effect of table 2, after optimization, the sound insulation amount of the front wall system is improved by 0.8-2.5dB in the frequency band of 400-8000Hz, specifically, as shown in fig. 8, compared with the original state curve, the sound pressure level of the optimized curve is higher, the sound insulation effect is greatly improved, and therefore noise entering the vehicle is greatly reduced.

Table 2 front wall sheet metal lower end structure optimization sound insulation effect improvement comparison

Sound insulation amount	Original state frequency band	Optimized frequency band
			400	34.3	35.2
500	40.1	40.9
			630	41.2	42.4
800	43.8	45.8
			1000	46.7	48.2
1250	50.9	52.7
			1600	57.7	60.1
2000	58.8	61.3
			2500	62.7	63.5
3150	63	64.0
			4000	65.5	66.7
5000	69.2	71.7
			6300	72.1	74.2
8000	74.8	76.1

The second embodiment of the utility model also provides a vehicle, comprising any one of the front wall structures of the automobile, wherein the design structures of the front wall lower end metal plate and the front wall lower end metal plate are respectively optimized, so that the sound insulation performance of the front wall system is improved, the noise entering a cab is reduced, the comfort of passengers is improved, and the requirements of the passengers on the sound quality in the automobile are met.

The foregoing embodiment numbers of the present utility model are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

In the foregoing embodiments of the present utility model, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be oriented 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described in general terms in the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the utility model.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. Enclose structure before car, a serial communication port, including enclose the panel beating before, enclose the panel beating before including being close to the roof enclose the panel beating upper end and be close to the preceding panel beating lower extreme of vehicle bottom before enclose the panel beating upper end and/or before enclose the panel beating lower extreme for having the double-deck sheet metal structure of cavity, the cavity intussuseption is filled with sound absorbing material.

2. The automobile front wall structure according to claim 1, further comprising an inner-A-column metal plate arranged on two sides of the front wall metal plate, wherein the double-layer metal plate structure and the inner-A-column metal plate are matched to form a closed cavity.

3. The automobile front wall structure according to claim 1, wherein at least one layer of sheet metal of the double-layer sheet metal structure is provided with a filling hole for filling the sound absorbing material.

4. The automobile front wall structure according to claim 1, wherein the cavity cross section of the cavity is in a quadrilateral shape, and the angles of the interior angles of the quadrilateral are different.

5. The automobile front wall structure according to claim 4, wherein the angle of the inner angle is greater than 40 °.

6. The automobile front wall structure according to claim 4, wherein the double-layer sheet metal structure comprises a first layer of sheet metal and a second layer of sheet metal which are oppositely arranged along the length direction of the automobile body, and the area of an area formed by surrounding a perpendicular line between the first layer of sheet metal, the second layer of sheet metal and the first layer of sheet metal and the second layer of sheet metal is larger than 60% of the area of the quadrangle.

7. The automobile front wall structure according to claim 1, wherein the double-layer sheet metal structure comprises a first layer of sheet metal and a second layer of sheet metal which are oppositely arranged along the length direction of the automobile body, and the distance between the first layer of sheet metal and the second layer of sheet metal is 20mm-35mm.

8. The automobile front wall structure according to claim 1, wherein the sound absorbing material is polyurethane foam.

9. The automobile front wall structure according to claim 2, wherein the double-layer sheet metal structure at the upper end of the front wall sheet metal is in sealing connection with the sheet metal in the A column through spot welding; and/or the double-layer sheet metal structure at the lower end of the front wall sheet metal is in sealing connection with the floor sheet metal through spot welding.

10. A vehicle characterized by comprising an automotive front wall structure according to any one of claims 1 to 9.