Noise reduction structure, drainage pipe end and vehicle

Abstract

The noise reduction structure comprises a water pipe head and a sound barrier component, the water pipe head is arranged on a metal plate and penetrates through the two sides of the metal plate, the water pipe head is connected with a water pipe body on the inner side of the metal plate, and the sound barrier component is arranged on the outer side of the metal plate and encloses the water pipe head. Wherein the drainage pipe end head is arranged on the metal plate and comprises an end head body and a drainage port; the first end of the end body is connected with the water pipe body. The water outlet is located in the second end of the end body; the opening end face of the second end of the end body is higher than the opening end face of the water outlet. The noise source structure is arranged in the correspondingly designed sound shadow area to reduce noise of a transmission path by utilizing the characteristic that the noise is reduced under the sound shadow area, so that the problem that noise in a cab is caused by poor noise reduction of the end part of the drainage pipe outside a vehicle is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction, in particular to a noise reduction structure, a drainage pipe end and a vehicle. Background Art

[0002] The noise problem in the vehicle NVH index (Noise, Vibration and Harshness) has always been among the top five complaints in the vehicle market. The vehicle drainage pipe structure, as one of the main pathways for external noise to propagate into the vehicle, has become a key improvement target for blocking external noise. The usual practice is to reduce the opening area of the drainage pipe head outside the vehicle, thereby reducing the noise transmission area and ultimately achieving the purpose of reducing noise in the cockpit. However, in the actual use of the vehicle, the reduction of the drainage pipe head area outside the vehicle will lead to problems such as poor drainage and debris clogging the pipe. In addition, the propagation of noise outside the vehicle is non-directional. Even if the opening area of the drainage pipe head outside the vehicle is reduced, the noise can still be transmitted to the vehicle through spatial reflection, diffraction, etc., that is, the effect of noise reduction achieved by reducing the pipe mouth area is not good.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention and does not constitute any limitation to the present invention. Utility Model Content

[0004] In view of the shortcomings of the existing technology mentioned above, the utility model provides a noise reduction structure, a drain pipe end and a vehicle. By utilizing the noise reduction characteristics in the sound shadow area, the noise source structure is arranged in the corresponding designed sound shadow area to reduce the propagation path noise, so as to solve the problem of poor noise reduction at the end of the drain pipe outside the vehicle, which causes noise in the cockpit.

[0005] The utility model provides a noise reduction structure, including a water pipe head and a sound barrier component. The water pipe head is installed on a sheet metal and passes through both sides of the sheet metal. The water pipe head is connected to a water pipe body on the inner side of the sheet metal. The sound barrier component is installed on the outer side of the sheet metal and encloses the water pipe head therein.

[0006] In one embodiment of the present invention, the opening of the water pipe head located on the outer side of the sheet metal is configured to be flat.

[0007] In one embodiment of the present invention, the end surface position of the sound barrier component on the outer side of the sheet metal is higher than the end surface position of the opening of the water pipe head on the outer side of the sheet metal.

[0008] In one embodiment of the present invention, the water pipe head includes an inner portion connected to the water pipe body and a drain outlet facing the outside of the sheet metal, and the sound barrier component encloses the drain outlet therein.

[0009] In one embodiment of the present invention, the water pipe head and the water pipe body are assembled into an assembly by plugging, and the water pipe head and the sheet metal are sealed by interference fit.

[0010] In one embodiment of the present invention, the cross-sectional space of the inner portion is larger than the cross-sectional space of the water pipe body.

[0011] In one embodiment of the present invention, the cross-sectional space of the drain outlet is smaller than the cross-sectional space of the inner portion.

[0012] In one embodiment of the present invention, the cross-sectional space of the drain outlet is smaller than the cross-sectional space of the sound barrier component, and a gap is left between the side wall of the drain outlet and the side wall of the sound barrier component.

[0013] The utility model also provides a drain pipe end cap, which is installed on a sheet metal and includes an end cap body and a drain outlet; the first end of the end cap body is connected to the water pipe body; the drain outlet is located inside the second end of the end cap body; and the opening end surface position of the second end of the end cap body is higher than the opening end surface position of the drain outlet.

[0014] The utility model provides a vehicle, comprising the above-mentioned noise reduction structure or drainage pipe end head.

[0015] The beneficial effects of the present invention are as follows: by adopting a structure for reducing the noise in the propagation path and a drain pipe end in the vehicle, the problem of external noise of the vehicle being transmitted into the vehicle through the pipe mouth of the drain pipe is solved. By adopting the principle of sound barrier and utilizing the noise reduction characteristics in the sound shadow area, the drain outlet is arranged in the sound shadow area of the corresponding design, which can greatly reduce the noise being transmitted into the cockpit through the pipe mouth, thereby achieving the effect of improving the NVH perception level in the vehicle.

[0016] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments of the present invention and, together with the specification, explaining the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and it is possible for a person of ordinary skill in the art to derive other drawings based on these drawings without inventive effort. In the accompanying drawings:

[0018] Figure 1 This is a cross-sectional view of the noise reduction structure of the utility model;

[0019] Figure 2 It is a perspective view of the drainage pipe end structure of the present utility model.

[0020] In the figure: 100, water pipe head; 110, inner part; 120, drain outlet; 200, sound barrier component; 300, sheet metal; 400, water pipe body; 500, end body. DETAILED DESCRIPTION

[0021] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless there is a conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific embodiments, not to limit the scope of protection of the present invention.

[0022] See also Figures 1 to 2 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of this utility model. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by this utility model without affecting the efficacy and purpose that can be achieved by this utility model. At the same time, the terms such as position and quantitative relationship quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this utility model without substantially changing the technical content.

[0023] See also Figures 1 to 2 The utility model provides a noise reduction structure, including a water pipe head 100 and a sound barrier component 200. The water pipe head 100 is installed on a sheet metal 300 and passes through both sides of the sheet metal 300. The water pipe head 100 is connected to a water pipe body 400 on the inner side of the sheet metal 300. The sound barrier component 200 is installed on the outer side of the sheet metal 300 and encloses the water pipe head 100 therein.

[0024] Specifically, in an embodiment of the present invention, the sound barrier component 200 and the water pipe head 100 can be two nested tubular structures. The larger sound barrier component 200 encloses the smaller water pipe head 100, so that the sound barrier component 200 confines the water pipe head 100 to its acoustic shadow zone, thereby reducing the propagation path noise. The water pipe head 100 is mounted on the sheet metal 300 of the corresponding structure, and one end of the water pipe head 100 is mounted and connected to the port of the noise source structure, such as the water pipe body 400. This is used to guide the drainage noise in the water pipe body 400 to propagate within the water pipe head 100 and conduct it from the inside of the sheet metal 300 to the outside. When the noise enters the portion of the water pipe head 100 outside the sheet metal 300, it eventually propagates along the opening of the water pipe head 100 to the space outside the sound barrier component 200. The sound insulation effect within the acoustic shadow zone of the sound barrier component 200 further reduces the intensity of the noise propagating to the outside space, thereby achieving a noise reduction effect by reducing the propagation path noise.

[0025] It should be noted that during the process of noise propagating from a noise source structure, such as the water pipe body 400, to the water pipe head 100 and the sound barrier component 200, the water pipe head 100 and the sound barrier component 200 can be structurally designed, for example, by designing different spatial shapes to weaken the transmission intensity of the noise to achieve the purpose of noise reduction. Noise-reducing materials such as sound-absorbing cotton, sound insulation blankets, and acoustic foam can also be selectively added to the water pipe head 100 or made into the sound barrier component 200. These noise-reducing materials can also be installed on the inner walls of the water pipe head 100 and the sound barrier component 200 to maintain structural stability and sealing, further reducing the noise along the propagation path. This will not be discussed in detail here.

[0026] See also Figures 1 to 2 In one embodiment, the opening of the water pipe head 100 located on the outside of the sheet metal 300 is configured to be flat.

[0027] Specifically, by setting the opening of the water pipe head 100 to a flat-mouth shape, on the one hand, the opening area is reduced to reduce the sound transmission area. On the other hand, the flat-mouth shape maintains a certain length size, which can facilitate the smooth passage of foreign objects in the noise source structure such as the water pipe body 400, avoid blockage and keep the water pipe head 100 unobstructed, and can also form different shapes at the opening to suppress the intensity of noise transmission.

[0028] See also Figures 1 to 2In one embodiment, the end surface of the sound barrier component 200 on the outside of the sheet metal 300 is positioned higher than the end surface of the opening of the water pipe head 100 on the outside of the sheet metal 300. The water pipe head 100 includes an inner portion 110 connected to the water pipe body 400 and a drain outlet 120 facing the outside of the sheet metal 300. The sound barrier component 200 encloses the drain outlet 120. The water pipe head 100 and the water pipe body 400 are assembled by plugging together, and the water pipe head 100 and the sheet metal 300 are sealed by an interference fit.

[0029] Specifically, in the embodiment of the present invention, by limiting the relationship between the end face position of the sound barrier component 200 and the end face position of the opening of the water pipe head 100, it is ensured that the sound barrier component 200 confines the water pipe head 100 within its sound shadow area, thereby maintaining the effect of reducing the noise in the propagation path.

[0030] More specifically, the purpose of reducing propagation path noise is to meet the noise intensity requirements within the corresponding space. Specifically, since the noise intensity requirements differ between the inside and outside of sheet metal 300, noise can be directed along the propagation path to locations with lower noise intensity requirements, thereby meeting the requirements at locations with higher noise intensity requirements. By installing a water pipe head 100, which connects to a noise source structure such as the water pipe body 400, through sheet metal 300 and providing a sealed connection between the water pipe head 100 and sheet metal 300 using an interference fit, the path for direct noise transmission from the inside to the outside of sheet metal 300 is further reduced, ensuring that the outside of sheet metal 300 meets the higher noise intensity requirements.

[0031] It should be noted that the water pipe head 100 is connected to a noise source structure, such as the water pipe body 400, by plugging and directing the noise at the water pipe body 400 outward through the water pipe head 100 inside. By adjusting the structural position of the water pipe head 100, a better sound barrier and noise reduction effect can be achieved, without the need to adaptively analyze and select different sound barrier component 200 structures based on the different characteristics of different noise source structures, such as the water pipe body 400. This optimizes the ease of use of the sound barrier component 200, allowing the water pipe head 100 with a noise reduction structure to be directly installed and connected to different noise source structures, such as the water pipe body 400, while achieving the same optimized effect of reducing propagation path noise as the sound barrier component 200.

[0032] See also Figures 1 to 2 In one embodiment, the cross-sectional space of the inner portion 110 is larger than the cross-sectional space of the water pipe body 400. The cross-sectional space of the drain outlet 120 is smaller than the cross-sectional space of the inner portion 110. The cross-sectional space of the drain outlet 120 is smaller than the cross-sectional space of the sound barrier member 200, and a gap is left between the sidewalls of the drain outlet 120 and the sidewalls of the sound barrier member 200.

[0033] Specifically, in this embodiment of the present invention, the water pipe head 100, which connects to a noise source structure such as the water pipe body 400, can be divided into an inner portion 110 and a drain outlet 120. By varying the cross-sectional space between the inner portion 110 and the drain outlet 120 and the noise source structure such as the water pipe body 400, the noise propagation path can be reduced to a certain extent. After noise is generated in the relatively small space of the water pipe body 400 and enters the relatively large space of the inner portion 110, that is, as the noise transitions from the small space to the larger space, the noise energy is dispersed over the larger area, reducing the sound pressure per unit area and, consequently, the noise intensity. Similarly, within the relatively larger space of the inner portion 110, the noise traverses a longer propagation path, and absorption by the air medium also attenuates the noise. When the noise propagates again from the larger space of the inner portion 110 to the smaller space of the drain outlet 120, it refocuses within the smaller space, increasing the local noise level while effectively reducing the overall noise intensity.

[0034] More specifically, the large space within inner portion 110 significantly absorbs high-frequency noise from pipe body 400. By transitioning noise from a small space to a large space, the noise burden within the small space can be reduced. The transition from a large space to a small space can then readjust the noise distribution, helping to reduce the discomfort caused by localized noise concentration. The cross-sectional space within drain outlet 120, which is larger than that of inner portion 110, forms an acoustic shadow zone between the opening of pipe head 100 and sound barrier component 200. The gap formed between the side walls prevents vibrations of the side walls of pipe head 100 caused by noise transmission from being directly transmitted to the side walls of sound barrier component 200, maintaining the effect of reducing noise along the propagation path.

[0035] See also Figures 1 to 2 The present invention also provides a drain pipe end cap, which is mounted on a sheet metal 300 and includes an end cap body 500 and a drain outlet 120; the first end of the end cap body 500 is connected to the water pipe body 400; the drain outlet 120 is located inside the second end of the end cap body 500; and the opening end surface position of the second end of the end cap body 500 is higher than the opening end surface position of the drain outlet 120.

[0036] Specifically, in the embodiment of the present invention, the end head body 500 can be understood as the aforementioned water pipe head 100, and the sheet metal can be understood as the sheet metal 300 of the vehicle body structure (the vehicle sheet metal, or the two sides of the sheet metal, i.e., the interior and exterior portions of the vehicle). Thus, by attaching the water pipe body 400 of the drain pipe to the end head body 500, and making the end face of the end head body 500 higher than the end face of the drain outlet 120 (that is, when viewed from the direction of the end head body and the drain outlet, the end head body encloses the drain outlet within itself), an acoustic shadow area of the drain outlet 120 is formed, thereby reducing the noise intensity of the noise at the drain pipe outlet along the propagation path.

[0037] More specifically, the structure of the drain pipe end (that is, the end body) can be installed at the drain pipe of the vehicle. By setting the end body 500 connected to the pipe mouth of the drain pipe to a special flat mouth shape at the pipe mouth of the drain outlet 120 outside the vehicle sheet metal 300, on the one hand, foreign matter in the drain pipe can be discharged smoothly, and on the other hand, its pipe mouth area can be reduced. At the same time, a barrier (that is, a sound barrier component on the end body) that is higher than the plane of the drain outlet 120 is added to the periphery of the drain outlet 120 outside the vehicle sheet metal 300, so that this barrier can limit the drain outlet 120 to the sound shadow area, thereby reducing the noise transmitted to the vehicle cockpit through the pipe mouth of the drain pipe.

[0038] The utility model provides a vehicle, comprising the above-mentioned noise reduction structure or drainage pipe end head.

[0039] Specifically, in embodiments of the present invention, the aforementioned noise reduction structure or drainpipe tip is employed in vehicles to prevent external noise from being transmitted into the vehicle through the drainpipe's orifice, while also avoiding the problem of foreign matter clogging that can occur with conventional, small-sized orifices. By leveraging the principle of sound barriers and the significant reduction in noise within acoustic shadows, the drain outlet is positioned within a correspondingly designed acoustic shadow, significantly reducing the transmission of noise into the cabin through the orifice, thereby enhancing the perceived NVH (Non-Volatile Heating, or NVH) level within the vehicle.

[0040] In summary, the utility model effectively overcomes some practical problems in the prior art and thus has high utilization value and use significance.

[0041] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A noise reduction structure, characterized in that: The invention comprises a water pipe head (100) and a sound barrier component (200), wherein the water pipe head (100) is mounted on a sheet metal (300) and passes through both sides of the sheet metal (300), the water pipe head (100) is connected to a water pipe body (400) on the inner side of the sheet metal (300), and the sound barrier component (200) is mounted on the outer side of the sheet metal (300) and encloses the water pipe head (100) therein.

2. The noise reduction structure according to claim 1, characterized in that: The opening of the water pipe head (100) located outside the sheet metal (300) is configured to be flat.

3. The noise reduction structure according to claim 2, characterized in that: The end surface position of the sound barrier component (200) on the outside of the sheet metal (300) is higher than the end surface position of the opening of the water pipe head (100) on the outside of the sheet metal (300).

4. The noise reduction structure according to claim 1, characterized in that: The water pipe head (100) includes an inner portion (110) connected to the water pipe body (400) and a drain outlet (120) facing the outside of the sheet metal (300), and the sound barrier component (200) encloses the drain outlet (120) therein.

5. The noise reduction structure according to claim 4, characterized in that: The water pipe head (100) and the water pipe body (400) are assembled into an assembly by plugging, and the water pipe head (100) and the sheet metal (300) are sealed by interference fit.

6. The noise reduction structure according to claim 4, characterized in that: The cross-sectional space of the inner portion (110) is larger than the cross-sectional space of the water pipe body (400).

7. The noise reduction structure according to claim 6, characterized in that: The cross-sectional space of the drain port (120) is smaller than the cross-sectional space of the inner portion (110).

8. The noise reduction structure according to claim 7, characterized in that: The cross-sectional space of the drain outlet (120) is smaller than the cross-sectional space of the sound barrier component (200), and a gap is left between the side wall of the drain outlet (120) and the side wall of the sound barrier component (200).

9. A drainage pipe end, characterized in that: The drain pipe end includes a noise reduction structure as described in any one of claims 1 to 8, the drain pipe end is installed on a sheet metal (300), and the drain pipe end includes an end body (500) and a drain outlet (120); the first end of the end body (500) is connected to the water pipe body (400); the drain outlet (120) is located in the second end of the end body (500); and the opening end surface position of the second end of the end body (500) is higher than the opening end surface position of the drain outlet (120).

10. A vehicle, characterized in that: It comprises the noise reduction structure according to any one of claims 1 to 8 or the drain pipe end according to claim 9.

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