Vehicle body tail structure of vehicle and vehicle

Abstract

The utility model relates to the field of automobile manufacturing, in particular to a vehicle body tail structure of a vehicle and the vehicle, the vehicle body tail structure comprises a rear bumper, and a noise reduction part is arranged on the inner side, facing the interior of the vehicle, of the rear bumper. Specifically, the transmission path of the electric drive noise at the vehicle tail door sequentially passes through the electric drive assembly, the rear bumper and the interior of the vehicle, and the noise reduction part is arranged on the inner side, facing the interior of the vehicle, of the rear bumper and located between the interior of the vehicle and the rear bumper of the transmission path. Therefore, when the noise generated by the electric drive assembly is transmitted to the interior of the vehicle through the transmission path, the noise must pass through the noise reduction part, so that the noise on the transmission path can be absorbed through the noise reduction part, and the electric drive noise is reduced.

Description

Technical Field

[0001] The utility model relates to the field of automobile manufacturing, and particularly relates to a vehicle body tail structure and a vehicle. Background Art

[0002] New energy vehicles have no engine compared with traditional fuel vehicles, or use an extended-range direct power supply, and the engine noise in the vehicle is significantly reduced. However, the electric drive noise of the new powertrain has become a very important noise source. Especially in the case of rear-wheel drive, without the background noise of the engine, the electric drive noise has become the focus of attention.

[0003] However, in the related art, the noise reduction of the electric drive body is mainly optimized from aspects such as gear accuracy and housing stiffness. However, due to factors such as process, cost, and cycle, it is often impossible to achieve. Summary of the Utility Model

[0004] The present application provides a vehicle body tail structure and a vehicle. The vehicle body tail structure can improve the sound insulation level on the noise transmission path, thereby reducing the electric drive noise.

[0005] To solve the above technical problems, a technical solution adopted by the present application is: to provide a vehicle body tail structure, which includes a rear bumper, and a noise reduction member is provided on the inner side of the rear bumper facing the vehicle interior.

[0006] Wherein, along the X direction from the vehicle head to the vehicle tail, the thickness of the noise reduction member is 10 mm - 50 mm.

[0007] Wherein, along the Y direction from the vehicle bottom to the vehicle roof, the length of the noise reduction member is 215 mm - 255 mm.

[0008] Wherein, the vehicle body tail structure further includes an inner rear panel and a sealing strip. The sealing strip is arranged on the inner rear panel, and the rear bumper overlaps on the sealing strip; the noise reduction member is arranged between the rear bumper and the inner rear panel, and the projection of the inner rear panel facing the noise reduction member covers the sealing strip.

[0009] Wherein, the vehicle body tail structure further includes an outer rear panel. The outer rear panel is arranged on the side of the inner rear panel facing the rear bumper, and one end of the outer rear panel is fixedly connected to the inner rear panel. The sealing strip is located at the connection between the outer rear panel and the inner rear panel; the noise reduction member is arranged between the rear bumper and the outer rear panel, and one end of the noise reduction member facing the outer rear panel extends to abut against the outer rear panel.

[0010] Among them, the rear bumper includes a first decorative panel and a second decorative panel. One end of the first decorative panel facing the sealing strip is connected to the second decorative panel, and the second decorative panel overlaps on the sealing strip; the noise reduction member includes a first noise reduction portion, a second noise reduction portion and a third noise reduction portion. The opposite ends of the second noise reduction portion are respectively connected to the first noise reduction portion and the third noise reduction portion. The first noise reduction portion is connected to the inner side of the first decorative panel, the second noise reduction portion is connected to the second decorative panel, and the third noise reduction portion extends towards the rear outer panel and abuts against the rear outer panel.

[0011] Among them, the length range that the first noise reduction portion covers at least the first decorative panel is 215 mm - 255 mm.

[0012] Among them, the noise reduction member is a sound-absorbing cotton with a uniform thickness, and the thickness of the sound-absorbing cotton is 10 mm - 50 mm.

[0013] Among them, along the Z direction from the left side to the right side of the vehicle, the length of the noise reduction member is greater than the length of the sealing strip.

[0014] This application also includes a second technical solution, providing a vehicle including the above-mentioned body tail structure.

[0015] The beneficial effect of this application is: Different from the prior art, the body tail structure provided by this application includes a rear bumper, and a noise reduction member is provided on the inner side of the rear bumper facing the vehicle interior. Specifically, the transmission path of the electric drive noise at the tailgate passes through the electric drive assembly, the rear bumper, and the vehicle interior in sequence. Since the noise reduction member is provided on the inner side of the rear bumper facing the vehicle interior and is located between the vehicle interior and the rear bumper in the transmission path. Therefore, when the electric drive assembly generates noise and transmits it to the vehicle interior through the transmission path, it must pass through the noise reduction member, so that the noise on the transmission path can be absorbed by the noise reduction member, reducing the electric drive noise. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0017] Figure 1 is a schematic structural diagram of an embodiment of the body tail structure of the vehicle of this application;

[0018] Figure 2 is Figure 1 the A-A cross-sectional structural diagram of;

[0019] Figure 3 is Figure 2 the partial enlarged structural diagram of. Detailed Embodiments

[0020] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe in detail the specific embodiments of the present application with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only for explaining the present application and not for limiting the present application. Additionally, it should be noted that for the sake of description, only the parts related to the present application rather than all the structures are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0021] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0022] In the description of the present application, the terms "first" and "second" are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0023] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0024] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic structural diagram of an embodiment of the vehicle body tail structure provided by the present application. Figure 2 Figure 1Schematic diagram of the A-A sectional structure. In one aspect of the present application, a vehicle body tail structure 100 is provided. The vehicle body tail structure 100 includes a rear bumper 1, and a noise reduction member 2 is provided on the inner side of the rear bumper 1 facing the vehicle interior. Specifically, the transmission path of the electric drive noise at the tailgate sequentially passes through the electric drive assembly, the rear bumper 1, and the vehicle interior. Since the noise reduction member 2 is provided on the inner side of the rear bumper 1 facing the vehicle interior and is located between the vehicle interior and the rear bumper 1 in the transmission path. Therefore, when the electric drive assembly generates noise and transmits it to the vehicle interior through the transmission path, it must pass through the noise reduction member 2, so that the noise reduction member 2 can absorb the noise on the transmission path and reduce the electric drive noise.

[0025] In the case where the vehicle adopts a rear-wheel drive form, the electric drive assembly will inevitably generate electric drive noise during use. The electric drive noise can be transmitted to the vehicle interior through the vehicle body tail, affecting the driving and riding experience. The vehicle body tail structure 100 provided by the present application can block the transmission of the electric drive noise on the transmission path by providing the noise reduction member 2 on the rear bumper 1, thereby improving the sound insulation level of the vehicle body tail structure 100 and reducing the noise inside the vehicle. Since the effect of reducing the electric drive noise can be achieved only by providing the noise reduction member 2 on the rear bumper 1, the vehicle body tail structure 100 provided by the present application also has the effects of simple structure and assembly process, low cost, etc., and is also applicable to the later noise tuning stage, and can quickly identify noise problems and implement solutions.

[0026] In an embodiment of the present application, in combination with Figure 1 and Figure 2 As shown, along the X direction from the front of the vehicle to the rear of the vehicle, the thickness H of the noise reduction member 2 is 10 mm - 50 mm.

[0027] Specifically, the X direction is the vehicle body length direction. The thickness H of the noise reduction member 2 is the length of the noise reduction member 2 along the X direction. Since too large a thickness H of the noise reduction member 2 will cause difficulties in installation, easy aging, falling off, etc., along the X direction, the thickness H of the noise reduction member 2 can be in the range of 10 mm to 50 mm, such as 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, etc., for easy installation and improved stability. Within the range of 10 mm - 50 mm, the larger the thickness H of the noise reduction member 2, the better the sound absorption effect, and the thickness H of the noise reduction member 2 can be increased according to requirements to improve the noise reduction effect. Of course, the thickness H of the noise reduction member 2 can also be slightly greater than 50 mm or slightly less than 10 mm within the error range, such as 51 mm, 9 mm, etc.

[0028] In a specific embodiment, the noise reduction member 2 can be a sound-absorbing cotton with a uniform thickness. The sound-absorbing cotton can absorb the electric drive noise and improve the noise reduction effect. Although the sound-absorbing cotton has the characteristic that the greater the thickness, the better the sound absorption effect, but due to the too large thickness of the sound-absorbing cotton, it will cause difficulties in edge sealing and is prone to aging, falling off, etc. Therefore, it is recommended that the thickness of the sound-absorbing cotton does not exceed 50 mm, and if the thickness is too small, the sound absorption effect will be reduced, so the thickness is not recommended to be less than 10 mm. That is to say, the thickness of the sound-absorbing cotton can be 10 mm - 50 mm. Of course, the specific size can also be determined according to the actual manufacturing cost, space size and noise reduction requirements.

[0029] On the rear bumper 1, there may also be various snap protrusions, screw holes, etc. that need to be connected to other structures. When installing the sound-absorbing cotton, it is necessary to avoid these structures. However, it is difficult to avoid some structures with a whole sound-absorbing cotton, which will cause unreliable bonding or welding, making the sound-absorbing cotton easy to fall off and reducing the stability. Therefore, the sound-absorbing cotton can be divided into several sound-absorbing parts, and the sound-absorbing parts can be installed on the rear bumper 1 and can avoid structures such as screw holes and snap protrusions, thereby improving the stability.

[0030] In another specific embodiment, the noise reduction member 2 can also include other components for noise reduction.

[0031] In an embodiment of the present application, as Figure 2 shown, along the Y direction from the vehicle bottom to the vehicle roof, the width D of the noise reduction member 2 is 215 mm - 255 mm.

[0032] Specifically, the Y direction is the vehicle body height direction. Along the Y direction, the width D of the noise reduction member 2 is within the range of 215 mm - 255 mm. For example, the width D is 215 mm, 225 mm, 235 mm, 245 mm, 255 mm, etc., to increase the sound absorption area of the noise reduction member 2 and improve the noise reduction effect. In another embodiment, within the allowable error range, the width D of the noise reduction member 2 can also be slightly less than 215 mm. In yet another embodiment, within the allowable error range, the width D of the noise reduction member 2 can also be slightly greater than 255 mm. Of course, the width D of the noise reduction member 2 can also be comprehensively evaluated and adjusted according to the manufacturing cost, space and noise reduction requirements.

[0033] In the above specific embodiments, the noise reduction member 2 can be a sound-absorbing cotton, that is, the width D of the sound-absorbing cotton is in the range of 215 mm - 255 mm. Since the sound absorption volume of the sound-absorbing cotton is related to the sound absorption coefficient and the sound absorption area, when the sound absorption coefficient remains unchanged, the larger the sound absorption area, the larger the sound absorption volume, and the larger the amount of sound-absorbing cotton, the stronger the ability of the sound-absorbing cotton to absorb the noise radiated by the external sound source, and the less the sound energy transmitted into the vehicle. Therefore, the width D of the sound-absorbing cotton can be greater than 215 mm according to the space on the rear bumper 1 and the noise reduction requirements to increase the sound absorption area and improve the sound absorption volume and noise reduction effect. For the convenience of installation and to improve or avoid the aging and falling off of the sound-absorbing cotton, the width D of the sound-absorbing cotton can be designed to be less than 255 mm.

[0034] Further, as Figure 1 shown, along the Z direction from the left side to the right side of the vehicle, the length L1 of the noise reduction member 2 is greater than the length L2 of the sealing strip 3, which can increase the sound absorption area of the noise reduction member 2 and improve the noise reduction effect.

[0035] The Z direction is the vehicle body width direction. The length L1 being greater than the length L2 means that the length L1 of the noise reduction member 2 along the Z direction covers the left and right two boundaries of the sealing strip 3 along the Z direction, so that the noise reduction member 2 can effectively block the noise coming from all directions and reduce the noise leakage points, improving the sound insulation performance.

[0036] In an embodiment of the present application, the body tail structure 100 further includes an inner rear panel 4 and a sealing strip 3. The sealing strip 3 is arranged on the inner rear panel 4, and the rear bumper 1 overlaps on the sealing strip 3. The noise reduction member 2 is arranged between the rear bumper 1 and the inner rear panel 4, and the projection of the inner rear panel 4 towards the noise reduction member 2 covers the sealing strip 3.

[0037] Specifically, the sealing strip 3 can be connected to the inner rear panel 4 by bonding, snap connection, etc. to improve the stability. Since the rear bumper 1 also overlaps on the sealing strip 3, the sealing strip 3 can seal the hollow cavity 6 formed by the rear bumper 1 and the inner rear panel 4. Because the projection of the inner rear panel 4 towards the noise reduction member 2 covers the sealing strip 3, that is, the transmission path of the electric drive noise can be successively through the electric drive assembly, the hollow cavity 6, the sealing strip 3, and the vehicle interior, as Figure 2 shown, so the sealing strip 3 can also play a role in hindering the transmission of the electric drive noise. Therefore, in order to improve the sound insulation level on the transmission path, the noise reduction member 2 can be arranged between the rear bumper 1 and the inner rear panel 4 and close to the sealing strip 3, so that the noise reduction member 2 is located between the sealing strip 3 and the hollow cavity 6, thereby the noise on the transmission path can be absorbed by the noise reduction member 2, and compared with only relying on the sealing strip 3 for sealing and noise reduction, the noise reduction effect is further improved. After the noise reduction member 2 is arranged, the transmission path of the electric drive noise becomes successively through the electric drive assembly, the hollow cavity 6, the noise reduction member 2, the sealing strip 3, and the vehicle interior.

[0038] In one embodiment of the present application, the rear body structure 100 further includes an outer rear panel 5. The outer rear panel 5 is disposed on the side of the inner rear panel 4 facing the rear bumper 1, and one end of the outer rear panel 5 is adhesively connected to the inner rear panel 4. The sealing strip 3 is located at the connection between the outer rear panel 5 and the inner rear panel 4. The noise reduction member 2 is disposed between the rear bumper 1 and the outer rear panel 5, and one end of the noise reduction member 2 extending towards the outer rear panel 5 abuts against the outer rear panel 5.

[0039] Specifically, the outer rear panel 5 and the inner rear panel 4 can be connected by welding. The sealing strip 3 is provided at the connection on the side facing the vehicle interior, which can achieve a sealing and noise reduction effect and also improve the connection stability. Since the outer rear panel 5 is located on the side of the inner rear panel 4 facing the noise reduction member 2, the transmission path of the electric drive noise can also sequentially pass through the electric drive assembly, the outer rear panel 5, the rear bumper 1, the sealing strip 3, and the vehicle interior. Therefore, the noise reduction member 2 can be disposed between the rear bumper 1 and the outer rear panel 5 to block the transmission of the electric drive noise, improve the sound insulation level on the noise transmission path, and thus reduce the electric drive noise.

[0040] Furthermore, one end of the noise reduction member 2 can also extend to abut against the outer rear panel 5, thereby increasing the sound absorption area on the electric drive noise transmission path and enhancing the noise reduction effect.

[0041] In one embodiment of the present application, in combination with Figure 2 and Figure 3 shown, Figure 3 is Figure 2 a partial enlarged structural schematic diagram. The rear bumper 1 includes a first decorative panel 11 and a second decorative panel 12. One end of the first decorative panel 11 facing the sealing strip 3 is connected to the second decorative panel 12, and the second decorative panel 12 overlaps the sealing strip 3. The noise reduction member 2 includes a first noise reduction portion 21, a second noise reduction portion 22, and a third noise reduction portion 23. Opposite ends of the second noise reduction portion 22 are respectively connected to the first noise reduction portion 21 and the third noise reduction portion 23. The first noise reduction portion 21 is connected to the inner side of the first decorative panel 11, the second noise reduction portion 22 is connected to the second decorative panel 12, and the third noise reduction portion 23 extends towards the outer rear panel 5 and abuts against the outer rear panel 5.

[0042] Specifically, the first noise reduction portion 21 is disposed on the inner side of the first decorative panel 11 and is connected to one end of the second noise reduction portion 22 facing the first decorative panel 11, which can absorb the noise transmitted to the first decorative panel 11. In a specific embodiment, the width D range of the first noise reduction portion 21 covering at least the first decorative panel 11 is 215 mm - 255 mm. The first noise reduction portion 21 can include structures such as sound-absorbing cotton. Therefore, the first noise reduction portion 21 also has the beneficial effects of structures such as sound-absorbing cotton, which will not be elaborated here.

[0043] The second noise reduction part 22 can be a rib plate welded and connected to the second trim panel 12, and one end of the second noise reduction part 22 facing the rear outer panel 5 is connected to the third noise reduction part 23. By arranging the rib plate between the hollow cavity 6 and the sealing strip 3, the stiffness of the second trim panel 12 can be improved, and the sound insulation level on the transmission path can also be improved, enhancing the noise reduction effect.

[0044] The third noise reduction part 23 abuts against the rear outer panel 5, which can increase the sound absorption area on the noise transmission path and also improve the stability of the second trim panel 12. In another specific embodiment, the third noise reduction part 23 can also be lapped on the rear outer panel 5 to facilitate later disassembly, repair, replacement, and maintenance.

[0045] In another specific embodiment, the first noise reduction part 21, the second noise reduction part 22, and the third noise reduction part 23 can also be other structures. The first noise reduction part 21 can also be arranged on the rear outer panel 5 to hinder the transmission of the electric drive noise passing through the rear outer panel 5, but it may affect the production line rhythm.

[0046] In other embodiments, the first noise reduction part 21 can also be arranged on both the first trim panel 11 and the rear outer panel 5 to further enhance the noise reduction effect.

[0047] On the other hand, the present application also provides a vehicle, which includes the above-mentioned body tail structure 100. Specifically, since the vehicle includes the body tail structure 100 described in the above embodiment, therefore, it also has the beneficial effects of the above-mentioned body tail structure 100, which will not be elaborated here.

[0048] It should be noted that terms such as "horizontal" and "vertical" do not mean that the components are absolutely horizontal or vertical, but can be slightly inclined; terms such as "parallel" and "perpendicular" do not mean that the fittings are absolutely parallel or perpendicular to each other, but can form a certain angular deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In addition, the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the products of the present application are usually placed during use. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present application.

[0049] It can be understood that the meaning of "a plurality of" in this text is at least two, such as two, three, etc., unless there are specific restrictive descriptions. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices. The term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.

[0050] The above description is only the implementation manner of this application, and does not limit the patent scope of this application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, is equally included in the patent protection scope of this application.

Claims

1. A body tail structure of a vehicle, characterized in that, It includes a rear bumper (1), and a noise reduction member (2) is provided on the inner side of the rear bumper (1) facing the interior of the vehicle; In the X direction from the front to the rear of the vehicle, the thickness of the noise reduction member (2) is 10 mm - 50 mm; In the Y direction from the bottom to the top of the vehicle, the width of the noise reduction member (2) is 215 mm - 255 mm.

2. The body tail structure according to claim 1, characterized in that, The body tail structure further includes an inner rear panel (4) and a sealing strip (3). The sealing strip (3) is arranged on the inner rear panel (4), and the rear bumper (1) overlaps on the sealing strip (3); The noise reduction member (2) is arranged between the rear bumper (1) and the inner rear panel (4).

3. The body tail structure according to claim 2, characterized in that, The body tail structure further includes an outer rear panel (5). The outer rear panel (5) is arranged on the side of the inner rear panel (4) facing the rear bumper (1), and one end of the outer rear panel (5) is adhesively connected to the inner rear panel (4). The sealing strip (3) is located at the connection between the outer rear panel (5) and the inner rear panel (4); The noise reduction member (2) is arranged between the rear bumper (1) and the outer rear panel (5), and one end of the noise reduction member (2) facing the outer rear panel (5) extends to abut against the outer rear panel (5).

4. The body tail structure according to claim 3, characterized in that, The rear bumper (1) includes a first decorative panel (11) and a second decorative panel (12). One end of the first decorative panel (11) facing the sealing strip (3) is connected to the second decorative panel (12), and the second decorative panel (12) overlaps on the sealing strip (3); The noise reduction member (2) includes a first noise reduction portion (21), a second noise reduction portion (22) and a third noise reduction portion (23). The opposite ends of the second noise reduction portion (22) are respectively connected to the first noise reduction portion (21) and the third noise reduction portion (23). The first noise reduction portion (21) is connected to the inner side of the first decorative panel (11), the second noise reduction portion (22) is connected to the second decorative panel (12), and the third noise reduction portion (23) extends towards the outer rear panel (5) and abuts against the outer rear panel (5).

5. The body tail structure according to claim 4, characterized in that, The length range that the first noise reduction portion (21) at least covers the first decorative panel (11) is 215 mm - 255 mm.

6. The body tail structure according to claim 2, characterized in that The noise reduction member (2) is a sound-absorbing cotton with a uniform thickness, and the thickness of the sound-absorbing cotton is 10 mm - 50 mm.

7. The body tail structure according to claim 2, characterized in that, In the Z direction from the left to the right of the vehicle, the length of the noise reduction member (2) is greater than the length of the sealing strip (3).

8. A vehicle, characterized in that, It includes the body tail structure according to any one of claims 1 - 7.

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