Glass guide groove sealing structure for automobile door and mounting method of glass guide groove sealing structure

Abstract

The invention relates to the technical field of automobile body sealing, in particular to a glass guide groove sealing structure for an automobile door and a mounting method of the glass guide groove sealing structure. The glass guide groove sealing structure comprises a sealing body, the sealing body comprises a B column section, the B column section is provided with a U-shaped framework, and the U-shaped framework is connected to a vehicle door metal plate in a clamped mode to fix the sealing body. The sealing body extends from the top of the B column section to form an inner sealing lip, the inner sealing lip wraps the inner side of the automobile door metal plate seam allowance edge from the outer side of the automobile door metal plate seam allowance edge, completely covers the edge of the seam allowance edge and continuously extends in the length direction of the B column section, and a sealing space is defined between the inner sealing lip in the wrapping state and the automobile door metal plate seam allowance edge. The problems that an existing zero-order-difference vehicle door B column section is poor in sealing performance, high in sound leakage value and prone to generating wind noise due to lack of a special sealing lip side are solved, the NVH performance of a vehicle is optimized, a quieter and more comfortable in-vehicle environment is created, and the overall driving quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile body sealing, and in particular to a glass run channel sealing structure for automobile doors and an installation method thereof. Background Art

[0002] In automotive design, zero-step-difference doors significantly enhance the vehicle's overall aesthetic and aesthetic appeal by eliminating the step between the door sheet metal and the bodyside, achieving a flush appearance when the door's exterior surface is closed. The glass run channel, a key door component, is installed in the door window frame area (primarily encompassing the A-pillar, B-pillar, and roof section). Its core function is to clamp and guide the door glass as it rises and falls, while also providing the necessary seal to prevent rain and dust intrusion and suppress wind noise and other NVH (noise, vibration, and harshness) issues. In zero-step-difference doors, the glass run channel must not only fulfill its basic sealing and guiding functions but also ensure that the exterior surface of the door glass, when closed, is flush with the exterior surfaces of surrounding trim (such as the high-gloss B-pillar cover and window frame trim), achieving a step-free visual effect.

[0003] To achieve a zero-step-difference effect and improve sealing performance, existing technologies have proposed a zero-step-difference mating structure for the side panel and door glass of a stamped door. This structure incorporates a glass run channel with a U-shaped opening for connection to the door sheet metal between the side panel and the main door frame. A lip assembly is located on the right side of the glass run channel (facing the door glass). This lip assembly typically includes multiple deformable sealing lips (e.g., a first lip, a second lip, and a third lip). These lips contact the door glass, providing sealing force and absorbing tolerances. They also maintain a flush surface between the door glass and the side panel (or side panel trim), achieving a zero-step-difference appearance while reducing wind resistance and noise.

[0004] Although the above-mentioned existing technologies achieve zero step difference and sealing in the roof area (ROOF section), their structures still have significant defects and shortcomings in practical applications, especially in the B-pillar section, a key area of ​​the zero step difference door: First, insufficient sealing in the B-pillar area leads to significant wind noise. The lip assembly and the resulting sealing structure in the aforementioned solution are primarily used in the roof section. The B-pillar area has weak sealing performance, which is more sensitive to wind noise and faces greater airflow impact. This area significantly increases the "sound leakage value," easily generating high-speed wind noise, severely deteriorating the vehicle's NVH performance, and affecting cabin quietness and passenger comfort.

[0005] Secondly, existing structures struggle to achieve a fully sealed lip at the B-pillar. In zero-step-difference door designs, which strive for extreme flatness, the space at the junction of the roof section and the B-pillar is often extremely limited, or even nonexistent. This makes it difficult for existing solutions to effectively integrate and arrange the critical sealing lip structure at the B-pillar. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of the embodiments of the present invention is to provide a glass run channel sealing structure for automobile doors, so as to solve the problems of weak sealing performance, high sound leakage value and easy wind noise generation in the B-pillar section of the existing zero-step difference door due to the lack of a dedicated sealing lip; overcome the difficulty of space limitation at the injection molding joint, and realize a continuous and fully enclosed sealing lip arrangement from the ROOF section to the B-pillar section; while ensuring the beautiful and smooth appearance of the zero-step difference door, significantly improve the sealing performance of the B-pillar area, optimize the vehicle's NVH performance, create a quieter and more comfortable vehicle interior environment, and improve the overall driving quality.

[0007] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions: A glass run channel sealing structure for a car door comprises a sealing body, the sealing body including a B-pillar section having a U-shaped frame, the U-shaped frame being clipped onto the door sheet metal to fix the sealing body; the sealing body extends an internal sealing lip at the top of the B-pillar section, the internal sealing lip wraps from the outside to the inside of the door sheet metal stop edge, completely covering the stop edge, and extending continuously along the length direction of the B-pillar section, wherein the internal sealing lip defines a sealed space between the internal sealing lip and the door sheet metal stop edge in the wrapped state.

[0008] Optionally, the B-pillar section also includes a first sealing lip, a second sealing lip and a third sealing lip. The first sealing lip, the second sealing lip and the third sealing lip are all located on the inner side of the door glass and directly contact the inner surface of the door glass to form a sealing interface. The first sealing lip, the second sealing lip and the third sealing lip are spaced apart to provide multiple sealing barriers.

[0009] Optionally, the sealing cavity formed by the internal sealing lip and the door sheet metal stop edge is a continuous closed cavity, and the sealing cavity runs through the entire length of the door sheet metal stop edge, and the root of the internal sealing lip is integrally connected to the main part of the B-pillar section of the sealing body.

[0010] Optionally, the sealing body also includes an A-pillar section and a ROOF section. The B-pillar section and the ROOF section are connected by an injection molded joint. A positioning insert is embedded inside the injection molded joint. The positioning insert and the injection molded joint are integrally injection molded and fixed to the inner cavity of the sealing body. The A-pillar section includes an outer lip, an inner lip and a bottom lip. The outer lip, the inner lip and the bottom lip jointly clamp the edge of the door glass.

[0011] Optionally, the opening direction of the U-shaped frame is perpendicular to the door sheet metal plane, and the inner side wall of the U-shaped frame is provided with a snap-on protrusion, which matches the snap-on piece of the B-pillar highlight cover to achieve X-direction fixation.

[0012] An embodiment of the present invention also provides an installation method for the glass run groove sealing structure as described above, comprising: clamping the B-pillar section of the sealing body to the clamping piece of the B-pillar highlight cover plate through a U-shaped frame, so that the internal sealing lip is initially located outside the door sheet metal stop edge; folding the internal sealing lip so that it wraps the door sheet metal stop edge from the outside to the inside, completely covering the stop edge; assembling the door window frame decorative panel to the door sheet metal, so that the door window frame decorative panel is pressed onto the outer surface of the folded internal sealing lip.

[0013] Optionally, before snapping on the B-pillar section, first assemble the ROOF section and A-pillar section of the sealing body to the corresponding positions of the door sheet metal. The ROOF section is fixed to the roof sheet metal through the guide groove buckle, and the outer lip, inner lip and bottom lip of the A-pillar section are adjusted to make it fit tightly with the edge of the door glass.

[0014] Optionally, folding the internal sealing lip includes applying external force to fold the internal sealing lip from the outside of the door sheet metal stop edge to the inside, keeping the connection between the internal sealing lip and the sealing body without distortion during the folding process, and making the internal sealing lip fit smoothly with the upper edge and inner surface of the stop edge after folding.

[0015] Optionally, after assembling the door window frame decorative panel, check the fit between the inner sealing lip and the door sheet metal stop edge. If there is a gap, reposition and apply pressure to fold the inner sealing lip to ensure that the inner sealing lip completely covers the edge of the stop edge and is wrinkle-free.

[0016] Optionally, before folding the inner sealing lip, confirm that the first sealing lip, the second sealing lip and the third sealing lip of the B-pillar segment are all located on the inner side of the door glass and aligned with the glass surface.

[0017] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: 1. The glass run channel sealing structure of the present invention is secured to the door sheet metal by a U-shaped frame in the B-pillar section of the sealing body, forming a basic support. The internal sealing lip extends from the top of the sealing body and is designed to completely wrap around the edge of the door sheet metal stop from the outside to the inside, forming a continuous sealed space between the stop and the stop. This structure blocks the direct intrusion path of external airflow and noise by fully wrapping the stop edge with the lip. At the same time, the sealed space can absorb vibration energy, solving the sound leakage and wind noise problems caused by the lack of a sealing layer in the B-pillar section of the zero-order difference door. The rigid fixation of the U-shaped frame and the flexible wrapping of the internal sealing lip form a synergistic effect, taking into account both installation stability and sealing adaptability.

[0018] 2. By innovatively adding an internal sealing lip to the seal body, the structure can closely fit the edge of the door sheet metal stop, forming a multiple seal, effectively isolating external noise. This not only significantly improves the sealing performance, but also optimizes the vehicle's NVH performance, creating a quieter and smoother environment inside the vehicle.

[0019] 3. Compared with the common zero-order difference door guide groove structure, the sealing lip design of the present invention is more coherent, avoiding the breakpoints and discontinuities commonly found in traditional designs, ensuring the consistency and reliability of the sealing effect, and reducing the risk of sealing failure due to structural incoherence.

[0020] 4. By adding a sealing lip, not only the sealing performance is enhanced, but also the installation stability of the door guide channel is improved. This additional lip provides more stable support during installation, ensuring the precise alignment of the guide channel and the door structure, reducing sealing problems caused by improper installation or vibration during vehicle operation, and improving overall reliability and durability.

[0021] 5. In summary, the new zero-step difference door glass guide channel structure proposed in this application, by optimizing the sealing lip design, not only significantly improves the sealing performance and NVH performance, but also enhances the continuity and installation stability of the parts, bringing users a higher quality driving experience.

[0022] Additional advantages of the present invention will be given in the description which follows, and in part will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the embodiments of this application or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some of the embodiments described in this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. In addition, the sizes or spacings between components are exaggerated to show the positions of the components, and the schematic diagrams are for illustrative purposes only.

[0024] Figure 1 Schematic diagram of a glass run channel sealing structure provided by an embodiment of the present invention; Figure 2 2. This is a schematic diagram of a glass run channel sealing structure provided by an embodiment of the present invention installed on a vehicle body; Figure 3 Schematic diagram of an injection-molded joint provided by an embodiment of the present invention; Figure 4 This is an exploded diagram illustrating the installation of a glass run channel sealing structure provided by an embodiment of the present invention; Figure 5 Schematic diagram of the lip structure of the glass run channel B-pillar section provided by an embodiment of the present invention; Figure: 1. A-pillar section of sealing body; 2. B-pillar section of sealing body; 3. First sealing lip; 4. Second sealing lip; 5. Third sealing lip; 6. Inner sealing lip; 7. B-pillar highlight cover; 8. Window frame trim; 9. Front door glass run channel; 10. Rear door glass run channel; 11. Front door sheet metal; 12. Rear door sheet metal; 13. Front door highlight cover; 14. Rear door highlight cover; 15. Front side door glass; 16. Rear side door glass; 17. Rear door window frame trim; 18. ROOF section; 19. Injection molded connector; 21. Glass. DETAILED DESCRIPTION It should be noted that the following detailed description is illustrative and is intended to further illustrate the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] Explanation of terms: Side: refers to the side structure of the car body, located outside the door.

[0026] Sealing lip (also known as sealing layer edge): refers to an elastic sheet or strip structure extending from the sealing body or guide groove structure, which is used to contact and seal with adjacent components (such as car door glass, sheet metal).

[0027] NVH: The abbreviation of noise, vibration and harshness, is an important indicator to measure the driving comfort of a car.

[0028] Example 1 In order to solve the technical problems raised by the background technology, this embodiment extends an internal sealing lip 6 on the sealing body of the B-pillar of the vehicle door. While ensuring the zero-step difference structure, it significantly improves the sealing performance of the door sheet metal stop edge, creates a quiet and smooth vehicle interior environment, and brings high-quality driving experience to users.

[0029] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, this embodiment proposes a glass run channel sealing structure for a car door, comprising a sealing body, wherein the sealing body comprises a B-pillar section, the B-pillar section having a U-shaped frame, and the U-shaped frame is clamped on the door sheet metal to fix the sealing body; Figure 5As shown, the sealing body extends an internal sealing lip 6 at the top of the B-pillar section. The internal sealing lip 6 wraps from the outer side to the inner side of the door sheet metal stop edge, completely covering the edge of the stop edge, and extends continuously along the length direction of the B-pillar section, wherein the internal sealing lip 6 defines a sealing space between the door sheet metal stop edge and the internal sealing lip 6 in the wrapped state.

[0030] In the glass 21 guide groove sealing structure, the B-pillar section of the sealing body is clipped onto the door sheet metal via a U-shaped frame. The U-shaped frame provides a stable mounting base for the sealing body, ensuring that the sealing body is not easily displaced during vehicle driving vibrations. The internal sealing lip 6 wraps from the outside of the door sheet metal stop edge to the inside and completely covers the edge, filling the gap between the stop edge and the sealing body. The sealed space can block the intrusion of outside air, rainwater, and noise, solving the problem of insufficient sound insulation and waterproof performance caused by insufficient sealing at the B-pillar of zero-order difference doors. The internal sealing lip 6 extends continuously along the length of the B-pillar section, avoiding the sealing breakpoints that may occur in traditional structures and ensuring the continuity of the seal.

[0031] like Figure 4 、 Figure 5 As shown, it includes the sealing body A-pillar section 1, the sealing body B-pillar section 2, the first sealing lip 3, the second sealing lip 4, the third sealing lip 5, the inner sealing lip 6, the B-pillar highlight cover 7, the window frame decorative panel 8, the front door glass run groove 9, the rear door glass run groove 10, the front door sheet metal 11, the rear door sheet metal 12, the front door highlight cover 13, the rear door highlight cover 14, the front side door glass 15, the rear side door glass 16, the rear door window frame decorative panel 17, the ROOF section 18, the injection joint 19, and the glass 21.

[0032] The B-pillar section also includes a first sealing lip 3, a second sealing lip 4 and a third sealing lip 5. The first sealing lip 3, the second sealing lip 4 and the third sealing lip 5 are all located on the inner side of the vehicle door glass 21 and are in direct contact with the inner surface of the vehicle door glass 21 to form a sealing interface. The first sealing lip 3, the second sealing lip 4 and the third sealing lip 5 are spaced apart to provide multiple sealing barriers.

[0033] The first, second, and third sealing lips 3, 4, and 5 are all located inside the door glass 21 and spaced apart. The first lip provides the primary sealing interface, the second lip assists in compensating for the glass 21's lifting and lowering tolerances, and the third lip forms the final barrier. These three spaced-apart lips form a stepped, multi-seal structure, blocking noise transmission paths. Combined with the internal sealing lip 6, which wraps around the sheet metal stop, this creates a fully closed-loop soundproofing loop in the B-pillar area, from the inside of the glass 21 to the sheet metal joint, synergistically optimizing NVH performance.

[0034] The sealing cavity formed by the internal sealing lip 6 and the door sheet metal stop edge is a continuous closed cavity. The sealing cavity runs through the entire length of the door sheet metal stop edge, and the root of the internal sealing lip 6 is integrally connected to the main part of the B-pillar section 2 of the sealing body.

[0035] The sealed cavity formed by the internal sealing lip 6 and the stopper edge is a continuous, closed cavity that runs the entire length of the stopper edge without interruptions, preventing localized sound leakage. The base of the lip is integrally molded with the seal body to ensure a strong connection and prevent cracking during folding. This closed cavity converts sheet metal vibration energy into air vibration and dissipates it, working together with the multiple glass 21 sealing lips to suppress high-frequency wind noise.

[0036] The sealing body also includes an A-pillar section and a ROOF section 18. The B-pillar section and the ROOF section 18 are connected by an injection molded joint 19. A positioning insert is embedded in the injection molded joint 19. The positioning insert and the injection molded joint 19 are integrally injection molded and fixed to the inner cavity of the sealing body. The A-pillar section includes an outer lip, an inner lip and a bottom lip. The outer lip, the inner lip and the bottom lip jointly clamp the edge of the door glass 21.

[0037] The seal body connects the B-pillar section and the roof section 18 via an injection-molded joint 19. This joint incorporates an integrally molded positioning insert, enhancing joint rigidity and ensuring precise positioning between the three sections. The outer, inner, and bottom lips of the A-pillar section work together to clamp the edge of the glass 21, forming a basic seal. The roof section 18 uses a traditional clip-on fastener to provide a reference for installation. The continuous design of the sealing lip 6 within the B-pillar section and the A / ROOF section 18 achieves a full-circle seal from roof to door sill, eliminating any weak points in the B-pillar.

[0038] The opening direction of the U-shaped frame is perpendicular to the door sheet metal plane, and the inner side wall of the U-shaped frame is provided with a snap-on protrusion, which matches the snap-on piece of the B-pillar highlight cover 7 to achieve X-direction fixation.

[0039] The U-shaped frame opening is perpendicular to the door sheet metal plane, ensuring maximum contact between the frame and sheet metal. The inner wall's snap-in projection mates with the snap-in tab on the B-pillar's high-gloss cover 7, limiting X-axis displacement and preventing seal lip misalignment. The gap between the frame base and the sheet metal absorbs manufacturing tolerances and prevents lip deformation caused by interference fit. The vertical snap-in direction is orthogonal to the folding direction of the inner sealing lip 6, preventing installation interference.

[0040] In summary, this embodiment aims to achieve a zero-step difference door effect and improve the door sealing performance by extending an internal sealing lip 6 from the sealing body for the guide groove structure of the B-pillar glass 21 of the door. The specific structure includes: Segmented sealing body: The sealing body is divided into A-pillar section, B-pillar section and ROOF section18.

[0041] Glass 21 guide groove A-pillar section: directly contacts the glass 21 to achieve sealing between the A-pillar and the glass 21.

[0042] The glass 21 guide groove B-pillar section includes a sealing body, which forms a "U"-shaped sealing groove on the cross section. The "U"-shaped groove contains a "U"-shaped frame, and the "U"-shaped frame serves as the clamping installation position of the sealing body.

[0043] The top of the sealing body extends to form an internal sealing lip 6, which is wrapped around the edge of the stop of the front door sheet metal 11 to optimize the sealing performance and enhance the driving experience.

[0044] The internal sealing lip 6 and the door sheet metal stop edge form a sealed cavity, which can isolate the B-pillar noise, create a quiet and smooth vehicle interior environment, and bring users a high-quality driving experience.

[0045] Example 2 This embodiment provides an installation method for the glass 21 guide groove sealing structure as described in Example 1, including: clamping the B-pillar section of the sealing body to the clamping piece of the B-pillar highlight cover 7 through a U-shaped frame, so that the internal sealing lip 6 is initially located outside the door sheet metal stop edge; folding the internal sealing lip 6 so that it wraps the door sheet metal stop edge from the outside to the inside, completely covering the stop edge; assembling the door window frame decorative panel 8 onto the door sheet metal, so that the door window frame decorative panel 8 is pressed onto the outer surface of the folded internal sealing lip 6.

[0046] The core process of the installation method is divided into three steps: Positioning and snap-in connection: The B-pillar section is pre-fixed through mechanical interlocking of the U-shaped frame and the B-pillar highlight cover 7, ensuring that the internal sealing lip 6 is initially located outside the stop edge, reserving operating space for folding.

[0047] Lip folding: Wrap the lip from the outside to the inside to completely cover the edge of the stopper to form a continuous sealing interface.

[0048] Decorative panel pressing: The door window frame decorative panel 8 presses the outer surface of the folded lip to provide mechanical protection and maintain the shape of the lip.

[0049] This method replaces traditional adhesive sealing by physical wrapping, solving the space limitation problem of not being able to arrange the lip at the injection-molded joint 19.

[0050] Furthermore, before snapping on the B-pillar section, first assemble the ROOF section 18 of the sealing body and the A-pillar section to the corresponding positions of the door sheet metal. The ROOF section 18 is fixed to the roof sheet metal through the guide groove buckle, and the outer lip, inner lip and bottom lip of the A-pillar section are adjusted so that they fit tightly with the edge of the door glass 21.

[0051] Before installing the B-pillar, complete the assembly of the ROOF segment 18 and the A-pillar. The ROOF segment 18 is secured to the roof panel using guide slots and clips, establishing the base position for the sealing system. The outer, inner, and bottom lips of the A-pillar are adjusted to fit snugly against the edge of the glass 21, ensuring a secure seal. This process ensures a precise reference for B-pillar installation, preventing misalignment of the internal sealing lip 6 due to cumulative tolerances across multiple segments.

[0052] Furthermore, folding the internal sealing lip 6 includes applying external force to fold the internal sealing lip 6 from the outside of the door sheet metal stop edge to the inside, and keeping the connection between the internal sealing lip 6 and the sealing body without distortion during the folding process, so that the internal sealing lip 6 fits smoothly with the upper edge and inner surface of the stop edge after folding.

[0053] The folding operation requires a special tool to apply external force, folding the lip from the outside to the inside. During the operation, the angle of force applied by the tool is controlled so that the lip first extends horizontally outward to cover the upper edge of the lip, then bends vertically downward to fit the inner surface of the lip. The stress state at the connection between the lip and the seal body is monitored throughout the folding process to prevent distortion or wrinkles and ensure a smooth fit to ensure the closure integrity of the sealing cavity.

[0054] Furthermore, after assembling the door window frame decorative panel 8, check the fitting state of the internal sealing lip 6 and the door sheet metal stop edge. If there is a gap, reposition and apply pressure to fold the internal sealing lip 6 to ensure that the internal sealing lip 6 completely covers the edge of the stop edge and there are no wrinkles.

[0055] After the door and window frame trim panel 8 is assembled, the fit quality of the internal sealing lip 6 must be verified: visually inspect the lip to ensure it completely covers the edge of the stopper. Palpate to check for gaps between the lip and the sheet metal. If a localized gap exists, use a specialized tool to perform targeted pressure-reinforcement and folding of the defective area. During pressure-reinforcement, the tool's working surface must match the lip's curvature to avoid damaging the sealing layer. This step ensures the continuity of the sealing cavity.

[0056] Furthermore, before folding the inner sealing lip 6 , it is confirmed that the first sealing lip 3 , the second sealing lip 4 and the third sealing lip 5 of the B-pillar segment are all located inside the door glass 21 and aligned with the surface of the glass 21 .

[0057] The status check before the folding operation includes: confirming that the first sealing lip 3, the second sealing lip 4 and the third sealing lip 5 are located on the inner side of the door glass 21 and are aligned parallel to the surface of the glass 21; checking that the internal sealing lip 6 does not touch the stop edge and maintains the initial suspended state; this pre-check avoids the misalignment of the sealing lips of the glass 21 affecting the subsequent folding operation, and ensures that the sealing functions of the B-pillar section are independent and do not interfere with each other.

[0058] Specifically: The door sheet metal features a glass guide channel (21). The channel structure consists of a bright metal strip (high-gloss cover), a sealing body, and an injection-molded connector (19) connecting the two sides of the sealing body. The bright metal strip is fastened to the sealing body, creating a visual appearance. The sealing body comprises the A-pillar, B-pillar, and C-pillar sections. The sealing body's ROOF section (18) continues the traditional design. The injection-molded connector (19) incorporates a positioning insert, which is integrally molded and located within the sealing body. The A-pillar section of the glass guide channel (21) is connected to the sealing body via the injection-molded connector (19). The A-pillar section includes an outer lip, an inner lip, and a bottom lip, which directly mate with the glass (21). The B-pillar section of the glass guide channel (21) mates with the glass (21) through the flexible guide rails on the front door's B-pillar.

[0059] As a zero-order difference door glass 21 guide groove lip structure, the sealing body B-pillar section 2 is composed of a first sealing lip 3, a second sealing lip 4 and a third sealing lip 5. The first sealing lip 3, the second sealing lip 4 and the third sealing lip 5 are all located on the inner side of the glass 21. The assembly plan is to wait until the sealing body ROOF section 18 and the sealing body A-pillar section 1 and other surrounding components are assembled in place.

[0060] Assemble the sealing body B-pillar section 2, which includes a "U"-shaped frame. Insert the "U"-shaped frame into the B-pillar highlight cover 7 snap-on piece in the X direction. At this time, the first sealing lip 3, the second sealing lip 4 and the third sealing lip 5 are all located on the inner side of the glass 21.

[0061] Check whether the inner sealing lip 6 extending from the B-pillar section 2 of the sealing body is assembled in place. After the inner sealing lip 6 is assembled in place, use a special auxiliary tool to flip the inner sealing lip 6 over the edge of the door sheet metal stop.

[0062] After the inner sealing lip 6 is turned out of the door sheet metal stop edge until it is flat, it is assembled into the door window frame decorative panel 8.

[0063] The B-pillar section 2 of the sealing body adopts a zero-step difference door guide groove structure, which is optimized and the cross-section is modified on the basis of the zero-step difference door guide groove structure. Compared with the common zero-step difference door guide groove structure, it extends an internal sealing lip 6 at the B-pillar, thereby effectively improving the sealing performance while ensuring the zero-step difference structure.

[0064] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A glass run channel sealing structure for a car door, characterized in that: The sealing body includes a B-pillar section, the B-pillar section has a U-shaped frame, and the U-shaped frame is clamped on the door sheet metal to fix the sealing body; The sealing body extends an internal sealing lip at the top of the B-pillar section. The internal sealing lip wraps from the outside to the inside of the door sheet metal stop edge, completely covering the edge of the stop edge and extending continuously along the length of the B-pillar section. The internal sealing lip defines a sealed space between the internal sealing lip and the door sheet metal stop edge in the wrapped state.

2. The glass run channel sealing structure according to claim 1, wherein: The B-pillar section also includes a first sealing lip, a second sealing lip and a third sealing lip. The first sealing lip, the second sealing lip and the third sealing lip are all located on the inner side of the vehicle door glass and directly contact the inner surface of the vehicle door glass to form a sealing interface. The first sealing lip, the second sealing lip and the third sealing lip are spaced apart to provide multiple sealing barriers.

3. The glass run channel sealing structure according to claim 2, wherein: The sealing cavity formed by the internal sealing lip and the door sheet metal stop edge is a continuous closed cavity. The sealing cavity runs through the entire length of the door sheet metal stop edge, and the root of the internal sealing lip is integrally connected to the main part of the B-pillar section of the sealing body.

4. The glass run channel sealing structure according to claim 1, wherein: The sealing body also includes an A-pillar section and a ROOF section. The B-pillar section and the ROOF section are connected by an injection molded joint. A positioning insert is embedded in the injection molded joint. The positioning insert and the injection molded joint are integrally injection molded and fixed to the inner cavity of the sealing body. The A-pillar section includes an outer lip, an inner lip and a bottom lip. The outer lip, the inner lip and the bottom lip jointly clamp the edge of the car door glass.

5. The glass run channel sealing structure according to claim 1, wherein: The opening direction of the U-shaped frame is perpendicular to the door sheet metal plane, and the inner side wall of the U-shaped frame is provided with a snap-on protrusion, which matches the snap-on piece of the B-pillar highlight cover to achieve X-direction fixation.

6. A method for installing the glass run channel sealing structure according to any one of claims 1 to 5, comprising: The B-pillar section of the sealing body is clamped to the clamping piece of the B-pillar highlight cover through a U-shaped frame, so that the internal sealing lip is initially located outside the door sheet metal stop edge; the internal sealing lip is folded so that it wraps the door sheet metal stop edge from the outside to the inside, completely covering the stop edge; the door window frame decorative panel is assembled to the door sheet metal, so that the door window frame decorative panel is pressed onto the outer surface of the folded internal sealing lip.

7. The installation method according to claim 6, wherein: Before attaching the B-pillar section, first assemble the ROOF section and A-pillar section of the sealing body to the corresponding positions of the door sheet metal. The ROOF section is fixed to the roof sheet metal through the guide groove buckle. Adjust the outer lip, inner lip and bottom lip of the A-pillar section to make it fit tightly with the edge of the door glass.

8. The installation method according to claim 6, wherein: Folding the internal sealing lip includes applying external force to fold the internal sealing lip from the outside of the door sheet metal stop edge to the inside, keeping the connection between the internal sealing lip and the sealing body without distortion during the folding process, and making the internal sealing lip fit smoothly with the upper edge and inner surface of the stop edge after folding.

9. The installation method according to claim 8, wherein: After assembling the door window frame decorative panel, check the fit between the inner sealing lip and the door sheet metal stop edge. If there is a gap, reposition and apply pressure to fold the inner sealing lip to ensure that the inner sealing lip completely covers the edge of the stop edge and there are no wrinkles.

10. The installation method according to claim 6, wherein: Before folding the inner sealing lip, make sure that the first sealing lip, second sealing lip, and third sealing lip of the B-pillar segment are all located on the inner side of the door glass and aligned with the glass surface.

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