Rear wall ventilation grille for improving NVH of vehicle

Abstract

The utility model discloses a rear wall ventilation grille for improving vehicle NVH (Noise Vibration and Harshness), which comprises a ventilation grille main body arranged on a mounting hole of a rear wall metal plate; the window is formed in the ventilation grille main body; and the air curtain is rotatably arranged on the ventilation grille main body, and the window can be blocked by the air curtain. When the automobile door is closed, the air pressure in the automobile is increased, and the air curtain starts to rotate under the action of the internal and external pressure difference, so that the rear part of the automobile is communicated with the external air pressure, the internal and external pressures are kept the same, and the problems of unsmooth door closing, strenuous door closing and the like are avoided. According to the rear wall ventilation grille, the ventilation grille body is arranged on the rear wall ventilation grille, so that airflow can flow into a vehicle only from the rear side, air disturbance generated when the airflow flows into the vehicle is greatly reduced, generated noise is reduced, and the NVH of the vehicle is improved.

Description

Technical Field

[0001] This application relates to the field of ventilation grille technology, and in particular to a rear ventilation grille for improving vehicle NVH. Background Technology

[0002] The function of the ventilation grille is to connect the rear of the car with the outside air pressure, preventing the air pressure inside the car from increasing when the door is closed, which could cause problems such as difficulty in closing the door or difficulty in closing it.

[0003] Existing vehicles with cargo boxes, such as pickup trucks and dump trucks, typically have their ventilation grilles installed on both sides of the rear sheet metal. This placement on the sides makes it easy for air to be drawn in from the sides, generating significant air turbulence and resulting in abnormal noises. Furthermore, the existing ventilation grille air curtains also produce considerable noise during rotation, which is detrimental to improving the vehicle's NVH (Noise, Vibration, and Harshness) levels.

[0004] Therefore, it is necessary to propose a rear ventilation grille to improve vehicle NVH, which has become an important technical problem that urgently needs to be solved. Utility Model Content

[0005] This application provides a rear ventilation grille to improve vehicle NVH, aiming to solve the problems in the prior art where ventilation grilles are usually installed on both sides of the rear sheet metal. Setting them on both sides makes it easy for air to be drawn in from the side, generating large air disturbances and resulting in abnormal noises. In addition, the existing ventilation grille air curtains also generate a lot of abnormal noises during rotation, which is not conducive to improving vehicle NVH.

[0006] To achieve the above objectives, this application proposes a rear ventilation grille for improving vehicle NVH, comprising: a ventilation grille body, the ventilation grille body being disposed on mounting holes in the rear sheet metal; a window, the window being opened in the ventilation grille body; and an air curtain, the air curtain being rotatably disposed in the ventilation grille body, the air curtain being able to block the window.

[0007] In some embodiments, it further includes a limiting portion disposed on the ventilation grille body, with a portion of the limiting portion located inside the window.

[0008] In some embodiments, the device further includes a plurality of snap-fit ​​components, each including: a snap-fit ​​bracket disposed on the ventilation grille body near the edge of the ventilation grille body; and a snap-fit ​​tongue disposed on the ventilation grille body, the snap-fit ​​tongue having a stepped surface.

[0009] In some embodiments, it further includes: at least two connection holes, the at least two connection holes being disposed in the ventilation grille body, and the at least two connection holes being provided with internal threads.

[0010] In some embodiments, the air curtain includes: a rubber layer; a sponge layer, wherein the sponge layer is bonded to the rubber layer.

[0011] In some embodiments, it further includes a collection trough disposed on the ventilation grille body.

[0012] This application proposes a rear ventilation grille for improving vehicle NVH (Noise, Vibration, and Harshness), comprising: a ventilation grille body, a window, and an air curtain. The ventilation grille body is mounted on mounting holes in the rear sheet metal; the window is opened in the ventilation grille body; and the air curtain is rotatably mounted on the ventilation grille body, and the air curtain can block the window. When the door is closed, the air pressure inside the vehicle increases. Under the action of the pressure difference between the inside and outside, the air curtain begins to rotate, thereby connecting the rear of the vehicle with the outside air pressure, maintaining the same pressure inside and outside, and avoiding problems such as difficulty in closing the door or the effort required to close it. By setting the ventilation grille body on the rear ventilation grille, airflow can flow into the vehicle only from the rear, significantly reducing the air turbulence caused by airflow entering the vehicle, thereby reducing noise and improving the vehicle's NVH. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0014] Figure 1 This is a structural schematic diagram of the rear sheet metal with a ventilation grille body installed in one embodiment of this application, viewed from one angle.

[0015] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0016] Figure 3 This is a structural schematic diagram of the rear sheet metal with a ventilation grille body installed in one embodiment of this application from another perspective.

[0017] Figure 4 for Figure 3 Enlarged view of part B in the middle;

[0018] Figure 5 This is a schematic diagram of the structure of the ventilation grille body in one embodiment of this application;

[0019] Figure 6 This is a cross-sectional view of the ventilation grille body in one embodiment of this application;

[0020] Figure 7 for Figure 6 Enlarged view of a section in the middle C;

[0021] Figure 8 This is a schematic diagram of the structure of the first air curtain in one embodiment of this application;

[0022] Figure 9 This is a schematic diagram of the structure of the second air curtain in one embodiment of this application;

[0023] Figure 10 A cross-sectional view of an air curtain in one embodiment of this application.

[0024] 1. Rear panel sheet metal, 2. Ventilation grille body, 21. Limiting part, 22. Clip bracket, 23. Clip tongue, 24. First air curtain, 25. Connecting hole, 26. Second air curtain, 27. Collection groove, 28. Window, 201. Rubber layer, 2011. Sealing part, 2012. Rotating shaft part, 2013. Anti-detachment part, 202. Sponge layer. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0028] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0029] See Figure 1 , Figure 3 , Figure 5 and Figure 6As shown, this application proposes a rear ventilation grille for improving vehicle NVH, comprising: a ventilation grille body 2, which is disposed on a mounting hole in the rear sheet metal 1; a window 28, which is opened in the ventilation grille body 2; and an air curtain, which is rotatably disposed in the ventilation grille body 2 and can block the window 28.

[0030] The ventilation grille body 2 forms the structural basis for the rear ventilation grille used to improve vehicle NVH (Noise, Vibration, and Harshness). All other components of the rear ventilation grille are directly or indirectly mounted on the ventilation grille body 2. The rear sheet metal 1 serves as the mounting base for the ventilation grille body 2. The mounting holes on the rear sheet metal 1 have the same shape as the outer contour of the ventilation grille body 2 and are used to mount the ventilation grille body 2. The window 28 is a through-slot on the ventilation grille body 2, connecting the rear of the vehicle to the outside air pressure. Air curtains are used to block or open the window 28.

[0031] Specifically, when the car door is closed, the air pressure inside the vehicle increases. Under the influence of the pressure difference between the inside and outside, the air curtain begins to rotate, thereby connecting the rear of the car with the outside air pressure and maintaining the same pressure inside and outside. This avoids problems such as difficulty in closing the door or the need for effort to close it. By setting the ventilation grille body 2 on the rear ventilation grille, airflow can flow into the vehicle only from the rear, significantly reducing the air turbulence caused by airflow entering the vehicle, thereby reducing noise and improving the vehicle's NVH (Noise, Vibration, and Harshness).

[0032] In detail, the ventilation grille body 2 has three rows of windows 28 arranged sequentially along its width, with each row containing four windows 28. The third row of windows 28 is closer to the bottom of the ventilation grille body 2. The air curtain includes a sealing part 2011, a rotating shaft part 2012, and an anti-detachment part arranged sequentially. The sealing part 2011 is used to seal the windows 28. Each window 28 of the ventilation grille body 2 is provided with a paired mounting slot. The rotating shaft part 2012 is partially located within the mounting slot. The cross-sectional area of ​​the anti-detachment part is larger than that of the mounting slot, effectively preventing the air curtain from detaching from the mounting slot. The air curtain is flexible and can deform to be installed into the mounting slot. See reference. Figure 5 , Figure 6 , Figure 8 and Figure 9 As shown, in the first row and the first row of windows 28, the sealing parts 2011 of the air curtains on the two left and two right windows 28 are an integral structure, thus forming the first air curtain 24. In the third row of windows 28, the sealing parts 2011 of the air curtains on the four windows 28 are an integral structure, thus forming the second air curtain 26.

[0033] See Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, in some embodiments, a limiting part 201321 is also included. The limiting part 201321 is disposed on the ventilation grille body 2, and part of the limiting part 201321 is located inside the window 28. The limiting part 201321 is used to restrict the rotation direction of the air curtain inside the window 28. That is, when the air pressure inside the vehicle increases, the air curtain can rotate, while when the air pressure outside the vehicle is high, the sealing part 2011 of the air curtain abuts against the limiting part 201321, thereby limiting the rotation direction of the air curtain by the limiting part 201321 and preventing the high-pressure airflow from the outside from seeping into the driver's cabin.

[0034] See Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments, multiple snap-fit ​​components are also included. Each snap-fit ​​component includes: a snap-fit ​​bracket 22, which is disposed near the edge of the ventilation grille body 2; the snap-fit ​​bracket 22 serves as the structural basis for the latch 23, which is disposed on the ventilation grille body 2 and has a stepped surface. The stepped surface includes an abutment surface and a limiting surface. During the process of inserting the ventilation grille body 2 into the mounting hole, the ventilation grille body 2 continuously moves towards the mounting hole. Under the action of the inner wall surface of the mounting hole, the latch 23 deforms towards the center of the ventilation grille body 2, thereby causing the abutment surface to abut against the inner wall surface of the mounting hole. As the ventilation grille body 2 continues to move towards the mounting hole, after the abutment surface abuts against the ventilation grille body 2, the initial installation of the ventilation grille is completed.

[0035] See Figure 3 and Figure 4 As shown, in some embodiments, it further includes at least two connecting holes 25, which are disposed on the ventilation grille body 2, and internal threads are provided in the at least two connecting holes 25. When the ventilation grille body 2 is installed on the rear sheet metal 1, the ventilation grille body 2 and the rear sheet metal 1 partially overlap. The connecting holes 25 are disposed on the overlapping part of the ventilation grille body 2 and the rear sheet metal 1, and a firm connection between the ventilation grille body 2 and the rear sheet metal 1 is achieved by fasteners, thereby improving the reliability of the ventilation grille body 2.

[0036] See Figure 10 As shown, in some embodiments, the air curtain includes: a rubber layer 201; and a sponge layer 202, the sponge layer 202 being bonded to the rubber layer 201. The rubber layer 201 and the sponge layer 202 can reduce the abnormal noise generated by the air curtain colliding with the ventilation grille body 2 during rotation, thus improving the vehicle's NVH performance.

[0037] In this embodiment, the rubber layer 201 is made of EPDM soft rubber, and the sponge layer 202 is made of foamed EPDM sponge. The air curtain sealing part 2011, the rotating shaft part 2012, and the anti-detachment part are all integrally formed rubber layers 201, with a preferred thickness of 1mm. The sponge layer 202 is pasted on the sealing part 2011, with a preferred thickness of 2mm. During the rotation of the air curtain, the sealing part 2011 is mainly prone to collision with the ventilation grille body 2.

[0038] See Figure 5 and Figure 6 As shown, in some embodiments, it further includes a collection trough 27, which is disposed on the ventilation grille body 2. The collection trough 27 is a rectangular sealed groove used to collect dust and prevent dust from directly entering the cab. The collection trough 27 is located near the bottom end of the ventilation grille body 2.

[0039] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A rear ventilation grille for improving vehicle NVH, characterized in that, include: Ventilation grille body (2), the ventilation grille body (2) is set on the mounting holes of the rear sheet metal (1); Window (28), said window (28) is opened in the ventilation grille body (2); An air curtain is rotatably mounted on the ventilation grille body (2) and can block the window (28).

2. The rear ventilation grille for improving vehicle NVH according to claim 1, characterized in that, Also includes: A limiting part (21) is provided on the ventilation grille body (2), and the limiting part (21) is partially located inside the window (28).

3. A rear ventilation grille for improving vehicle NVH according to claim 2, characterized in that, It also includes multiple snap-fit ​​connectors, the snap-fit ​​connectors including: A clip bracket (22) is disposed on the ventilation grille body (2) near the edge of the ventilation grille body (2). The tongue (23) is disposed on the ventilation grille body (2) and the tongue (23) is provided with a stepped surface.

4. A rear ventilation grille for improving vehicle NVH according to claim 1, characterized in that, Also includes; At least two connecting holes (25) are provided in the ventilation grille body (2), and at least two connecting holes (25) are provided with internal threads.

5. A rear ventilation grille for improving vehicle NVH according to claim 1, characterized in that, The air curtain includes: Rubber layer (201); A sponge layer (202) is bonded to the rubber layer (201).

6. A rear ventilation grille for improving vehicle NVH according to claim 5, characterized in that, Also includes: Collection trough (27) is provided on the ventilation grille body (2).

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