Structure for reducing wind noise of vehicle roof system

Abstract

The invention discloses a wind noise reducing structure of a vehicle roof system, and belongs to the technical field of automobiles, the wind noise reducing structure comprises a turbulent flow main body and an in-vehicle ceiling, the inner wall of the turbulent flow main body is clamped with a skylight, and one side of the outer wall of the turbulent flow main body is fixedly connected with a running water collecting box; the turbulent flow comb is arranged at one end, far away from the flowing water collecting box, of the bottom of the turbulent flow main body, the turbulent flow comb is composed of a plurality of small hills which are alternately arranged, the cross section of the turbulent flow comb is triangular, and extending angles are subjected to round corner passivation treatment and are uniformly distributed at the distance of about 20mm from the bottom edges; the problems that in the using process of a traditional vehicle top noise reduction structure, due to the fact that airflow inside and outside a skylight opening has large speed difference, an unstable shear layer is formed at the front edge of the opening, the airflow is introduced into a compartment to form wind vibration noise, a driver is prone to being irritable and tired, and the noise reduction effect is poor are further solved. Therefore, the riding comfort of the automobile is influenced.

Description

Technical Field

[0001] This application belongs to the field of automotive technology, and specifically relates to a structure for reducing wind noise in a vehicle roof system. Background Technology

[0002] Current technology mounts sunroofs on the car roof. As the area enclosed by the sunroof becomes increasingly larger, the opening cavity also becomes larger. Due to the significant velocity difference between the airflow inside and outside the sunroof opening, an unstable shear layer forms at the leading edge of the opening. Under the influence of this unstable shear layer, vortices detach from the leading edge and move with the airflow towards the trailing edge. When the vortex reaches the trailing edge, it collides with it, breaks up, and generates a pressure wave that propagates throughout the car. This pressure wave, reaching the leading edge of the opening, triggers another vortex detachment. This process repeats continuously, causing the shear layer to vibrate at a specific frequency, resulting in periodic pressure pulsations within the car. This is the cause of sunroof wind vibration noise. Furthermore, when the vibration frequency of the shear layer matches the natural frequency of the open car interior, resonance occurs, and the sunroof wind vibration noise is most pronounced at this point. Wind-induced vibration noise is characterized by low frequency (around 20Hz) and high intensity (above 100dB). Such a riding environment can easily make drivers and passengers feel irritable and tired, and has a great impact on the ride comfort of the car.

[0003] The existing technology has the following problems: Existing vehicle roof noise reduction structures, during use, cause unstable shear layers to form at the leading edge of the sunroof opening due to the significant speed difference between the airflow inside and outside the sunroof opening. This wind noise is transmitted into the passenger compartment, easily causing driver irritability and fatigue, thus affecting the comfort of the car ride. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a structure for a vehicle roof system to reduce wind noise.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A structure for reducing wind noise in a vehicle roof system includes a spoiler body and an interior roof. The inner wall of the spoiler body is fitted with a sunroof, and a water collection box is fixedly connected to one side of the outer wall of the spoiler body. The top of the vehicle interior roof is fixedly connected to a roof panel, and an installation frame is fixedly connected between the vehicle interior roof and the roof panel.

[0006] A further improvement to the technical solution of the present invention is that an electrically controlled telescopic platform is fixedly connected to both ends of the inner wall of the mounting frame.

[0007] A further improvement of the technical solution of the present invention is that an extension plate is installed at the output end of the electrically controlled telescopic platform.

[0008] A further improvement of the technical solution of the present invention is that a turbulence comb is fixedly connected to one end of the bottom of the turbulence body.

[0009] A further improvement of the technical solution of the present invention is that the top of the extension plate is fixedly connected to both ends of the bottom of the turbulence body.

[0010] A further improvement of the technical solution of the present invention is that: a sliding groove is provided on the inner wall of the mounting frame near the electric control telescopic platform, and the inner wall of the sliding groove is slidably connected to both ends of the outer wall of the water collection box.

[0011] A further improvement of the technical solution of the present invention is that a sunshade is slidably connected to one end of the inner wall of the chute near the water collection box.

[0012] A further improvement of the technical solution of the present invention is that an installation plate is fixedly connected to one side of the outer wall of the sunshade.

[0013] A further improvement of the technical solution of the present invention is that: one side of the outer wall of the mounting plate is fixedly connected to the end of the outer wall of the water collection box near the turbulence-causing body.

[0014] A further improvement of the technical solution of the present invention is that: a U-shaped plate is fixedly connected to the side of the outer wall of the sunshade away from the mounting plate, and one side of the outer wall of the U-shaped plate is in contact with one end of the inner wall of the mounting frame.

[0015] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures pointed out in the description, claims and drawings.

[0016] Compared with the prior art, this application has the following advantages: This invention provides a structure for reducing wind noise in a vehicle roof system. By setting a baffle comb at the bottom of the baffle body away from the water collection box, and because the baffle comb is composed of multiple alternating "hills" with a triangular cross-section and rounded corners, and is evenly distributed with the base edges spaced approximately 20 mm apart, this invention further solves the problem of unstable shear layers forming at the leading edge of the sunroof opening due to the large speed difference between the airflow inside and outside the sunroof opening during use. This wind noise is transmitted into the passenger compartment and easily causes drivers to become irritable and fatigued, thus affecting the comfort of the car ride. Attached Figure Description

[0017] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A structural diagram of the present invention is shown; Figure 2 A structural diagram of the mounting frame of the present invention is shown; Figure 3 A structural diagram of the turbulence comb of the present invention is shown; Figure 4 A diagram of the skylight closure structure of the present invention is shown; Figure 5 The present invention is shown Figure 4 Enlarged structural diagram at point A Figure 6 A diagram showing the unfolding structure of the sunroof of the present invention is provided. Figure 7 The present invention is shown Figure 6 Structural diagram at point B.

[0019] Legend: 1. Spoiler body; 2. Interior roof; 3. Sunroof; 4. Water collection box; 5. Roof panel; 6. Mounting frame; 7. Electrically controlled telescopic platform; 8. Extension plate; 9. Spoiler comb; 10. Slide; 11. Sun visor; 12. Mounting plate; 13. U-shaped plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown in the figure, the structure of a vehicle roof system for reducing wind noise according to an embodiment of the present invention includes a spoiler body 1 and an interior roof 2. A sunroof 3 is snapped onto the inner wall of the spoiler body 1, and a water collection box 4 is fixedly connected to one side of the outer wall of the spoiler body 1. A roof panel 5 is fixedly connected to the top of the interior roof 2, and an installation frame 6 is fixedly connected between the interior roof 2 and the roof panel 5. An electrically controlled telescopic platform 7 is fixedly connected to both ends of the inner wall of the installation frame 6. An extension plate 8 is installed at the output end of the electrically controlled telescopic platform 7. A spoiler comb 9 is fixedly connected to one end of the bottom of the spoiler body 1, and the top of the extension plate 8 is fixedly connected to both ends of the bottom of the spoiler body 1. like Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a sliding groove 10 is provided on the inner wall of the mounting frame 6 near the side of the electrically controlled telescopic platform 7, and the inner wall of the sliding groove 10 is slidably connected to both ends of the outer wall of the water collection box 4. A sunshade 11 is slidably connected to the inner wall of the sliding groove 10 near the end of the water collection box 4. An installation plate 12 is fixedly connected to one side of the outer wall of the sunshade 11. One side of the outer wall of the installation plate 12 is fixedly connected to the end of the outer wall of the water collection box 4 near the turbulence-disrupting body 1. A U-shaped plate 13 is fixedly connected to the outer wall of the sunshade 11 away from the installation plate 12, and one side of the outer wall of the U-shaped plate 13 is in contact with one end of the inner wall of the mounting frame 6.

[0022] The technical problem to be solved by this invention is to avoid the vibration frequency of the shear layer of the sunroof 3 from being consistent with the natural frequency of the open car body, which would cause the sunroof 3 to be affected by resonance, generate wind vibration noise, and thus make the driver and passengers feel irritable and tired, which would have a great impact on the ride comfort of the car.

[0023] During operation, a roof panel 5 is installed on top of the interior roof 2, and an installation frame 6 is installed between the interior roof 2 and the roof panel 5. An electrically controlled telescopic platform 7 (composed of a motor, lead screw, push block, and output end mounting block, etc., and exhibiting a curved movement trajectory, which is existing technology) is installed at both ends of the inner wall of the installation frame 6. A sliding groove 10 is installed on the side of the inner wall of the installation frame 6 closest to the electrically controlled telescopic platform 7. A water collection box 4 is then installed in the sliding groove 10, and pushed along the sliding groove 10 to move between the interior roof 2 and the roof panel 5. At this point, the sunroof 3 is installed on the inner wall of the spoiler body 1. Since the spoiler body 1 is a detachable structure and has a pre-set snap-fit ​​C-shaped opening on its inner wall, it is easy to install the sunroof 3 on the inner wall of the spoiler body 1 using a snap-fit ​​structure. By placing the spoiler body 1 with the sunroof 3 installed in the groove on the surface of the roof panel 5, one end of the bottom of the spoiler body 1 is embedded in the water collection box 4. Since the two ends of the bottom of the spoiler body 1 are provided with extension plates 8, when the spoiler body 1 and the sunroof 3 are placed on the surface of the roof panel 5, the bottom of the extension plate 8 contacts the output end of the electronically controlled telescopic platform 7. The bottom of the extension plate 8 and the output end of the electronically controlled telescopic platform 7 are fixed with bolts. Then, the sunshade 11 is installed in the slide groove 10. By providing a mounting plate 12 on one side of the outer wall of the sunshade 11, one side of the outer wall of the mounting plate 12 contacts the bottom of one side of the outer wall of the water collection box 4. Since the two ends of the bottom of the water collection box 4 are provided with extension columns, the extension columns are inserted into the inner cavity of the mounting plate 12 and fixed with bolts, thereby completing the installation of the sunroof 3. It should be further explained that by setting a turbulence comb 9 at the bottom of the turbulence body 1 away from the water collection box 4, and because the turbulence comb 9 is composed of multiple alternating "hills" with a triangular cross-section and rounded corners, and is evenly distributed with the base edges spaced approximately 20 mm apart, due to the significant velocity difference between the airflow inside and outside the sunroof 3 opening, an unstable shear layer is formed at the leading edge of the opening. Under the action of the unstable shear layer, the vortex detaches from the leading edge of the opening and moves with the airflow towards the trailing edge of the opening. When the vortex reaches the trailing edge of the opening, it collides with the trailing edge, breaks up, and generates a pressure wave that propagates to both inside and outside the carriage. The pressure wave transmitted to the inside of the carriage... The force wave, upon reaching the leading edge of the opening, will trigger the shear layer to detach again. This process repeats cyclically, causing the shear layer to vibrate at a specific frequency. The pressure pulsation inside the carriage also fluctuates periodically. When the vibration frequency of the shear layer matches the natural frequency of the open carriage, resonance will occur. This noise is characterized by low frequency (around 20Hz) and high intensity (above 100dB), easily causing irritation and fatigue for passengers, significantly impacting the ride comfort. However, when using a spoiler comb, the airflow entering from the roof will impact these raised "hills," breaking the originally continuous, high-speed airflow into dispersed smaller streams (i.e., "airflow fragmentation"). (Effect) This avoids the formation of a stable shear layer and vortex in the sunroof 3 opening cavity by a large area of ​​airflow. The shedding and impact of vortexes are the core causes of wind vibration noise. The broken airflow cannot form a strong vortex, which reduces the possibility of wind noise generation from the root. This further solves the problem that in the use of traditional vehicle roof noise reduction structures, due to the large speed difference between the airflow inside and outside the sunroof 3 opening, an unstable shear layer is formed at the front edge of the opening, which is transmitted into the cabin and forms wind vibration noise. This can easily cause the driver to become irritable and tired, thus affecting the comfort of the car ride. It should be further explained that by setting a U-shaped plate 13 on the side of the outer wall of the sun visor 11 away from the mounting plate 12, and with one side of the outer wall of the U-shaped plate 13 in contact with one end of the inner wall of the mounting frame 6, when the sunroof 3 is opened, the U-shaped plate 13 disengages from the mounting frame 6. When the airflow enters the air between the sunroof 3 and the sun visor 11 through the baffle comb 9, the airflow is divided by the baffle comb 9. Due to the design of the U-shaped plate 13, the gap between the sun visor 11 and the sunroof 3 is widened, so that the cut small streams of airflow are drawn into the U-shaped plate 13 and frequently collide and mix with the small streams of airflow in the U-shaped plate 13, so that it cannot form a pressure wave that reflects back and forth, further consuming the energy of the airflow, thereby achieving the purpose of greatly reducing the air pressure fluctuation inside the vehicle. The pressure wave with small amplitude vibration generated in the U-shaped plate 13 is evenly diffused to the surroundings through the sun visor 11 and absorbed by the mounting frame 6 through the groove 10, so that the energy generated by the pressure wave is quickly weakened. It should be further explained that during vehicle operation, the water collection box 4 can collect any residual rainwater that may seep out after the sunroof 3 is closed, preventing liquid from seeping into the interior of the vehicle through gaps. At the same time, the sliding cooperation between the water collection box 4 and the slide 10 allows it to move synchronously with the spoiler body 1 and the sun visor 11 during the opening and closing of the sunroof 3, ensuring that the movement of each component is coordinated and consistent, while avoiding jamming or displacement, further ensuring the stability of the noise reduction effect of the spoiler comb 9 and the U-shaped plate 13.

[0024] Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A structure for reducing wind noise in a vehicle roof system, characterized in that: Includes a spoiler body (1) and a roof (2) inside the vehicle. The inner wall of the spoiler body (1) is fitted with a sunroof (3), and a water collection box (4) is fixedly connected to one side of the outer wall of the spoiler body (1). The top of the interior roof (2) is fixedly connected to the roof panel (5), and an installation frame (6) is fixedly connected between the interior roof (2) and the roof panel (5).

2. The structure for reducing wind noise in a vehicle roof system according to claim 1, characterized in that: Electrically controlled telescopic platforms (7) are fixedly connected to both ends of the inner wall of the mounting frame (6).

3. The structure for reducing wind noise in a vehicle roof system according to claim 2, characterized in that: An extension plate (8) is installed at the output end of the electrically controlled telescopic platform (7).

4. The structure for reducing wind noise in a vehicle roof system according to claim 1, characterized in that: A turbulence comb (9) is fixedly connected to one end of the bottom of the turbulence body (1).

5. The structure for reducing wind noise in a vehicle roof system according to claim 3, characterized in that: The top of the extension plate (8) is fixedly connected to both ends of the bottom of the turbulence body (1).

6. The structure for reducing wind noise in a vehicle roof system according to claim 2, characterized in that: The inner wall of the mounting frame (6) is provided with a sliding groove (10) on the side near the electric telescopic platform (7), and the inner wall of the sliding groove (10) is slidably connected to both ends of the outer wall of the water collection box (4).

7. The structure for reducing wind noise in a vehicle roof system according to claim 6, characterized in that: A sunshade (11) is slidably connected to one end of the inner wall of the chute (10) near the water collection box (4).

8. The structure for reducing wind noise in a vehicle roof system according to claim 7, characterized in that: A mounting plate (12) is fixedly connected to one side of the outer wall of the sunshade (11).

9. The structure for reducing wind noise in a vehicle roof system according to claim 8, characterized in that: One side of the outer wall of the mounting plate (12) is fixedly connected to the end of the outer wall of the water collection box (4) near the turbulence body (1).

10. A structure for reducing wind noise in a vehicle roof system according to claim 8, characterized in that: A U-shaped plate (13) is fixedly connected to the side of the outer wall of the sunshade (11) away from the mounting plate (12), and one side of the outer wall of the U-shaped plate (13) is in contact with one end of the inner wall of the mounting frame (6).

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