An optimized NVH performance door exterior water-cutting structure

Abstract

This application discloses an optimized NVH performance exterior water-cutting structure for car doors, belonging to the field of automotive body sealing technology. The structure comprises a car door glass, an exterior water-cutting body, an exterior sheet metal, and an interior sheet metal. The distance between the upper inner wall of the exterior water-cutting body and the top end of the exterior sheet metal is A. An inner lip is provided at one open end of the exterior water-cutting body. An interference value B exists between the inner lip and the exterior sheet metal. A mounting hook is provided at the other open end of the exterior water-cutting body. The distance between the inner wall of the mounting hook and the interior sheet metal is C. This design significantly improves the first-time assembly success rate, effectively reduces labor hours and related costs, and significantly enhances the positional stability of the exterior water-cutting body after assembly, ensuring consistency in the interference between the water-cutting outer lip and the glass, resulting in a more uniform and neat assembly appearance.

Description

Technical Field

[0001] This application belongs to the field of automotive body sealing technology, and specifically relates to an external water-cutting structure for optimizing NVH performance of car doors. Background Technology

[0002] In automobiles, a water-repellent sealing strip refers to the water-repellent sealing strip for car windows, located between the window glass and the door frame. It is divided into inner and outer water-repellent strips. The outer water-repellent strip is installed on the outside of the door and window frame, and its main function is to prevent rainwater and dust from entering the interior of the door or the car. It also guides rainwater along a specific path through water channels to drain it out at the bottom of the door, and also has a certain decorative function.

[0003] The current vehicle exterior water cutter has obvious design flaws: its lower snap-fit ​​bend retains a 1mm gap with the door reinforcement plate, and the outer bottom is either not in contact with the outer sheet metal of the door or has a gap. This not only leads to a low first-time success rate of exterior water cutter assembly, increasing labor time and production costs, but also results in insufficient positional stability and poor appearance consistency after assembly. At the same time, the exterior water cutter has low tolerance for the door sheet metal, and due to insufficient lip pressure, there is a risk of leakage noise, which seriously affects the door sealing performance and user experience. Summary of the Invention

[0004] To address the aforementioned issues, this application provides an optimized NVH performance door external water-cutting structure, which can significantly improve the first-time assembly success rate, effectively reduce labor hours and related costs, and also significantly enhance the positional stability of the external water-cutting after assembly, ensuring consistency in the amount of interference between the water-cutting outer lip and the glass, resulting in a more uniform and neat assembly appearance.

[0005] An optimized NVH performance exterior water-cutting structure for a car door includes a door glass, an exterior sheet metal, and an interior sheet metal. The exterior water-cutting structure includes an exterior water-cutting body. The door glass, exterior water-cutting body, exterior sheet metal, and interior sheet metal are assembled and installed. The distance A between the upper inner wall of the exterior water-cutting body and the top end of the exterior sheet metal is provided. An inner lip is provided at one open end of the exterior water-cutting body. The inner lip and the exterior sheet metal have an interference value B. A mounting hook is provided at the other open end of the exterior water-cutting body. The distance C between the inner wall of the mounting hook and the interior sheet metal is provided.

[0006] Preferably, the value of A is in the range of 0.5mm-1mm, and the preferred value is 0.8mm; Allow reasonable assembly allowance to avoid interference or deformation between the upper part of the exterior water cutter body and the sheet metal due to minor sheet metal errors, while ensuring the flatness of the upper part of the exterior water cutter body.

[0007] Preferably, the interference value B ranges from 0.5mm to 0.8mm, with a preferred value of 0.6mm; The interference value B ranges from 0.5mm to 0.8mm, with a preferred value of 0.6mm. This "slight interference" achieves "lateral fixation" of the lower part of the water-cutting body on the outside of the car door, ensuring a tight fit between the inner lip and the outer sheet metal of the car door. It also compensates for sheet metal tolerances through the elastic deformation of the inner lip, solving the problem of "insufficient lip load" in the prior art, while avoiding noise leakage.

[0008] Preferably, the spacing value of C is 0 mm; With a C value of 0mm, the zero-gap fit achieves the "longitudinal positioning" of the exterior water cutter body of the car door, eliminating positional deviation caused by gaps after assembly, directly improving the positional stability of the exterior water cutter body after assembly, and providing a basis for the consistency of interference between the exterior water cutter body and the door glass.

[0009] Clearly defined numerical parameters for A, B, and C reduce assembly difficulty, increase the success rate of first-time assembly, and reduce labor hours and costs. At the same time, the combined design of zero clearance (C value), reasonable interference (B value), and reserved allowance (A value) prevents the outer water-cutting body of the door from shifting after assembly, ensuring consistent appearance. The interference fit between the inner lip and the outer sheet metal of the door enhances the ballast strength of the inner lip and, together with the stable interference with the door glass, avoids noise leakage and improves the NVH performance of the door.

[0010] Preferably, the outer water-cutting body of the car door is provided with multiple sets of outer lips; the outer water-cutting body of the car door is attached to the car door glass through the outer lips, and the interference between the outer water-cutting body of the car door and the car door glass is consistent; The tight fit between the outer lip and the door glass can isolate external noise during driving, such as wind noise (the noise generated by air flowing through the gap between the glass and the door when driving at high speed) and road noise (the noise transmitted by road bumps), reducing the amount of noise entering the cabin.

[0011] Preferably, the outer lip of the door's outer water-cutting body is made of elastic material. During the window raising and lowering process, the outer lip can gently conform to the door glass surface, playing a "scraping and cleaning" role (scraping away a small amount of residual water and dust on the glass surface); at the same time, the elastic conforming design can reduce the frictional resistance when the door glass is raised and lowered, avoiding scratches on the door glass or jamming caused by hard contact, and improving the smoothness of operation.

[0012] Preferably, the outer water-cutting body of the vehicle door is provided with multiple sets of mounting hooks, and the multiple sets of mounting hooks are evenly distributed along the length direction of the outer water-cutting body of the vehicle door; the cross-section of the mounting hook is L-shaped; The exterior water deflector body of the car door is installed with a 0mm gap between the hook and the inner sheet metal of the car door (parameter C), and precise upper and lower gap / interference design (parameters A and B) to ensure that the position is fixed after assembly, avoiding loosening or displacement. At the same time, it ensures that the installation height of the exterior water deflector body of all car doors and the fit with the door glass are consistent, improving the neatness and aesthetics of the vehicle appearance.

[0013] Preferably, the material of the exterior water cutter body of the vehicle door is EPDM rubber; The material of the exterior water deflector body is EPDM rubber. Utilizing its elasticity, weather resistance and waterproofness, it achieves a seal between the door glass and the outer lip of the exterior water deflector body, blocking rainwater and noise.

[0014] Preferably, the outer water cutter body of the car door has excellent elasticity, which can achieve interference fit (B value) between the outer water cutter body of the car door and the outer sheet metal of the car door, maintain ballast force for a long time, and solve the problem of "insufficient lip ballast" in the existing technology; The exterior water deflector body of the car door has strong weather resistance. It is not easy to age and harden due to long-term exposure to the outside, ensuring consistent fit with the door glass, exterior sheet metal and interior sheet metal, and improving appearance stability. The exterior water-cooling body of the door has good compatibility and strong fit with the exterior and interior sheet metal of the door and the door glass, reducing assembly gaps, improving sealing effect, and thus optimizing NVH performance.

[0015] Preferably, a wear-resistant layer is formed on the inner wall of the inner lip edge; The inner lip is prone to wear due to long-term friction with the outer sheet metal of the car door, which affects the sealing performance and service life. Extending the wear-resistant layer (such as polytetrafluoroethylene) can improve the product's durability.

[0016] Preferably, the outer water-cutting body, outer lip, inner lip, and mounting hook of the door are integrally formed.

[0017] Compared with the prior art, this application has the following advantages: Clearly defined numerical parameters for A, B, and C reduce assembly difficulty, increase the success rate of first-time assembly, and reduce labor hours and costs. At the same time, the combined design of zero clearance (C value), reasonable interference (B value), and reserved allowance (A value) prevents the outer water-cutting body of the door from shifting after assembly, ensuring consistent appearance. The interference fit between the inner lip and the outer sheet metal of the door enhances the ballast strength of the inner lip and, together with the stable interference with the door glass, avoids noise leakage and improves the NVH performance of the door.

[0018] 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. Attached Figure Description

[0019] 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.

[0020] Figure 1 A schematic diagram of an external water-cutting structure for optimizing NVH performance is shown. Figure 1 ; Figure 2 A schematic diagram of an external water-cutting structure for optimizing NVH performance is shown. Figure 2 .

[0021] Illustrations: 1. Door glass; 2. Door exterior water cutter body; 3. Door exterior sheet metal; 4. Door interior sheet metal; 5. Inner lip; 6. Outer lip; 7. Installed folding hook. Detailed Implementation

[0022] 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.

[0023] like Figure 1 As shown, an optimized NVH performance door external water-cutting structure is disclosed. The door includes a door glass 1, an outer door sheet metal 3, and an inner door sheet metal 4. The external water-cutting structure includes an external water-cutting body 2. The door glass 1, the external water-cutting body 2, the outer door sheet metal 3, and the inner door sheet metal 4 are assembled and installed. The distance between the upper inner wall of the external water-cutting body 2 and the top end of the outer door sheet metal 3 is A. An inner lip 5 is provided at one open end of the external water-cutting body 2. The inner lip 5 and the outer door sheet metal 3 have an interference value B. A mounting hook 7 is provided at the other open end of the external water-cutting body 2. The distance between the inner wall of the mounting hook 7 and the inner door sheet metal 4 is C. like Figure 2As shown, the value of A ranges from 0.5mm to 1mm, with a preferred value of 0.8mm; Allow reasonable assembly allowance to avoid interference or deformation between the upper part of the outer water cutter body 2 and the sheet metal due to minor sheet metal errors, while ensuring the flatness of the upper part of the outer water cutter body 2.

[0024] like Figure 2 As shown, the interference value B ranges from 0.5mm to 0.8mm, with a preferred value of 0.6mm; The interference value B ranges from 0.5mm to 0.8mm, with a preferred value of 0.6mm. This "slight interference" achieves "lateral fixation" of the lower part of the outer water-cutting body 2 of the car door, ensuring a tight fit between the inner lip 5 and the outer sheet metal 3 of the car door. It also compensates for sheet metal tolerances through the elastic deformation of the inner lip 5, solving the problem of "insufficient lip load" in the prior art, while avoiding noise leakage.

[0025] like Figure 2 As shown, the spacing value of C is 0mm; With a C value of 0mm, the zero-gap fit achieves the "longitudinal positioning" of the outer water cutter body 2 of the car door, eliminating positional deviation caused by gaps after assembly, directly improving the positional stability of the outer water cutter body 2 after assembly, and providing a basis for the consistency of interference between the outer water cutter body 2 of the car door and the door glass 1.

[0026] Clearly defined numerical parameters for A, B, and C can reduce assembly difficulty, increase the success rate of first-time assembly, and reduce labor hours and costs. At the same time, the combined design of zero clearance (C value), reasonable interference (B value), and reserved allowance (A value) prevents the outer water-cutting body 2 of the door from shifting after assembly, ensuring consistent appearance. The interference fit between the inner lip 5 and the outer sheet metal 3 of the door enhances the ballast force of the inner lip 5, and the stable interference with the door glass 1 avoids noise leakage and improves the NVH performance of the door.

[0027] like Figure 1 As shown, the outer water-cutting body 2 of the car door is provided with multiple sets of outer lips 6; the outer water-cutting body 2 of the car door is attached to the car door glass 1 through the outer lips 6, and the interference between the outer water-cutting body 2 of the car door and the car door glass 1 is consistent. The tight fit between the outer lip 6 and the door glass 1 can isolate external noise such as wind noise (the noise generated by air flowing through the gap between the glass and the door when driving at high speed) and road noise (the noise transmitted by road bumps) during the driving process, and reduce its entry into the cabin. The outer lip 6 of the car door's outer water-cutting body 2 is made of elastic material. During the raising and lowering of the car window, the outer lip 6 can gently fit against the surface of the car door glass 1, playing a "scraping and cleaning" role (scraping away a small amount of water and dust remaining on the glass surface); at the same time, the elastic fit design can reduce the frictional resistance when the car door glass 1 is raised and lowered, avoiding scratches on the car door glass 1 or jamming during raising and lowering caused by hard contact, and improving the smoothness of operation.

[0028] The outer water-cutting body 2 of the vehicle door is provided with multiple sets of mounting hooks 7, and the multiple sets of mounting hooks 7 are evenly distributed along the length direction of the outer water-cutting body 2 of the vehicle door; the cross-section of the mounting hooks 7 is L-shaped; The exterior water cutter body 2 of the car door is fixed in position after assembly by installing the hook 7 with a 0mm gap (parameter C) between it and the inner sheet metal 4 of the car door, and by precise upper and lower gap / interference design (parameters A and B), avoiding loosening or displacement. At the same time, it ensures that the installation height of the exterior water cutter body 2 of all car doors and the fit with the door glass 1 are consistent, improving the neatness and aesthetics of the vehicle appearance.

[0029] The material of the external water-cutting body 2 of the vehicle door is EPDM rubber; The material of the outer water-cutting body 2 of the car door is EPDM rubber. Utilizing its elasticity, weather resistance and waterproofness, it achieves a seal between the car door glass 1 and the outer lip 6 of the outer water-cutting body 2 of the car door, blocking rainwater and noise.

[0030] The outer water-cutting body 2 of the car door has excellent elasticity, which can achieve interference fit (B value) between the outer water-cutting body 2 and the outer sheet metal 3 of the car door, maintain ballast force for a long time, and solve the problem of "insufficient lip ballast" in the existing technology; The exterior water-cutting body 2 of the car door has strong weather resistance. The exterior water-cutting body 2 is exposed to the outside for a long time and is not easy to age and harden. It ensures the consistency of the fit with the door glass 1, the exterior sheet metal 3 and the interior sheet metal 4 of the car door, and improves the appearance stability. The exterior water-cooling body 2 of the car door has good compatibility and strong fit with the exterior sheet metal 3, the interior sheet metal 4 and the door glass 1, reducing assembly gaps, improving sealing effect, and thus optimizing NVH performance.

[0031] A wear-resistant layer is provided on the inner wall of the inner lip 5; The inner lip 5 is prone to wear due to long-term friction with the outer sheet metal 3 of the car door, which affects the sealing performance and service life. Extending the wear-resistant layer (such as polytetrafluoroethylene) can improve the product's durability.

[0032] The outer water-cutting body 2, outer lip 6, inner lip 5, and mounting hook 7 of the car door are integrally molded.

[0033] 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. An optimized NVH performance exterior water-cutting structure for a car door, the car door comprising a door glass (1), an exterior sheet metal (3), and an interior sheet metal (4), characterized in that: The exterior water-cutting structure of the car door includes an exterior water-cutting body (2); the car door glass (1), the exterior water-cutting body (2), the exterior sheet metal (3) and the interior sheet metal (4) are assembled and installed; the distance between the upper inner wall of the exterior water-cutting body (2) and the top end of the exterior sheet metal (3) is A; an inner lip (5) is provided at the opening end of one side of the exterior water-cutting body (2); the inner lip (5) and the exterior sheet metal (3) have an interference value B; a mounting hook (7) is provided at the opening end of the other side of the exterior water-cutting body (2); the distance between the inner wall of the mounting hook (7) and the interior sheet metal (4) is C.

2. The optimized NVH performance door external water-cutting structure according to claim 1, characterized in that: The value of A ranges from 0.5mm to 1mm, with a preferred value of 0.8mm.

3. The optimized NVH performance door external water-cutting structure according to claim 1, characterized in that: The interference value B ranges from 0.5mm to 0.8mm, with a preferred value of 0.6mm.

4. The optimized NVH performance door external water-cutting structure according to claim 1, characterized in that: The spacing value of C is 0mm.

5. The optimized NVH performance door external water-cutting structure according to claim 1, characterized in that: The outer water-cutting body (2) of the car door is provided with multiple sets of outer lips (6); the outer water-cutting body (2) of the car door is attached to the car door glass (1) through the outer lips (6), and the interference between the outer water-cutting body (2) of the car door and the car door glass (1) is consistent.

6. The optimized NVH performance door external water-cutting structure according to claim 5, characterized in that: The outer water-cutting body (2) of the car door is provided with multiple sets of mounting hooks (7), and the multiple sets of mounting hooks (7) are evenly distributed along the length direction of the outer water-cutting body (2).

7. The optimized NVH performance door external water-cutting structure according to claim 6, characterized in that: The cross-section of the mounting hook (7) is L-shaped.

8. The optimized NVH performance door external water-cutting structure according to claim 1, characterized in that: The material of the exterior water-cutting body (2) of the car door is EPDM rubber.

9. The optimized NVH performance door external water-cutting structure according to claim 8, characterized in that: A wear-resistant layer is provided on the inner wall of the inner lip edge (5).

10. The optimized NVH performance door external water-cutting structure according to claim 9, characterized in that: The outer water-cutting body (2), outer lip (6), inner lip (5) and mounting hook (7) of the car door are integrally molded.

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