Vehicle door top sealing system

Abstract

Disclosed is a vehicle door top sealing system, belonging to the technical field of automobile parts, and aiming to solve the problems of vehicle body damage, water leakage at connection points, wind noise and rust caused by using a penetrating fixing method for existing sealing strips. The vehicle door top sealing system comprises a glass guide channel, wherein a connecting portion of the glass guide channel is provided with a first connecting rail (7) having a U-shaped cross section, and inner lips (8) and inverted teeth (9) are provided on opposite inner walls of the first connecting rail, such that the glass guide channel can be firmly clamped on a vehicle body sheet metal part in a non-penetrating snap-fit manner; and a sealing portion of the vehicle door top sealing system extends from the connecting portion and is configured to elastically abut against the top of a piece of vehicle door glass (1) to form a main seal. In the vehicle door top sealing system, traditional riveting is replaced with a non-destructive snap-fit structure, fundamentally eliminating the risk of leakage and rust caused by drilling, and greatly simplifying an assembly process. The vehicle door top sealing system significantly improves the waterproof performance, noise reduction performance, durability and reliability of the vehicle by means of a multi-seal design incorporating an outer weatherstrip and an outer sealing lip.

Description

A door top sealing system Technical Field

[0001] This invention relates to the field of automobile manufacturing technology, and more particularly, to a sealing structure for a window glass guide groove suitable for car doors. Background Technology

[0002] In modern automotive design, car doors are not only passageways for passengers to enter and exit, but also key components for ensuring the airtightness of the cabin and isolating it from the external environment (such as rain, dust, and noise). The door sealing system, especially the sealing structure at the top of the windows, is crucial to the overall comfort, durability, and safety of the vehicle.

[0003] Traditional framed car doors have windows that are completely enclosed by the door frame during opening and closing, making glass guidance and sealing relatively easy. However, as consumers increasingly value streamlined and stylish car exteriors, frameless door designs are being used more and more widely across various vehicle types, including coupes, sedans, and even SUVs. In frameless door structures, when the window is closed, its upper edge directly contacts the sheet metal of the roof side panel or a specially designed sealing strip, lacking the support and coverage of a traditional door frame.

[0004] This design places higher technical demands on the roof sealing system. Currently, a common sealing solution for frameless doors is to directly fix pre-formed glass guide channels or sealing strips to the corresponding sheet metal parts of the vehicle body. The fixing method typically uses mechanical fasteners, such as rivets or screws. While this method provides strong connection strength, it has inherent drawbacks:

[0005] (1) Damage to the integrity of the vehicle body structure: In order to install rivets, holes must be drilled in the sheet metal parts of the vehicle body. These holes destroy the original continuous structure and anti-corrosion layer of the sheet metal parts, becoming potential rust initiation points. After long-term use, the metal around the connecting holes is prone to fatigue due to vibration and stress concentration, and may even develop micro-cracks.

[0006] (2) Risk of leakage: Riveting points are inherently difficult to make completely watertight. Even if sealant is used between fasteners and sheet metal parts, over time, material aging, thermal expansion and contraction, and continuous vibration during vehicle operation can cause the sealant to fail, resulting in gaps at the joint. Rainwater or water from washing the vehicle can then seep into the interior through these gaps, causing mold growth on the interior and damage to electronic components, severely impacting the user experience and vehicle value.

[0007] (3) Wind noise problem: The structural discontinuity and potential gaps formed at the riveting points will interfere with airflow when the vehicle is traveling at high speed, becoming a source of wind noise and reducing the acoustic comfort (NVH performance) inside the vehicle.

[0008] To address these issues, the industry has proposed several improvement solutions. For example, Chinese patent application CN202111361784.7 discloses a car door structure that uses a glass guide channel sealing strip containing horizontal and vertical elastic elements. While this solution aims to improve the sealing effect between the glass and the sealing element, the glass guide channel itself still needs to be installed on the car door window frame by means of rivets, failing to fundamentally solve the structural damage and leakage risks caused by riveting.

[0009] Therefore, the industry urgently needs a new type of door top sealing system that can ensure reliable sealing performance while avoiding penetrating damage to the body sheet metal, thereby completely solving the leakage problem at the connection point and improving the overall sealing and durability of the vehicle. Summary of the Invention

[0010] This invention aims to address the problems arising from the use of penetrating fixing methods such as riveting in existing vehicle door sealing systems. This method not only damages the vehicle body sheet metal, easily causing water leakage, wind noise, and corrosion at the connection points, but also involves complex installation processes and low efficiency.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A door top sealing system includes a glass guide channel, the glass guide channel comprising:

[0013] A connecting portion, the connecting portion including a first connecting rail for snap-fitting to a vehicle sheet metal part, the first connecting rail having a U-shaped cross-section to accommodate the edge of the sheet metal part, and having at least one inner lip for abutting against one side of the sheet metal part and at least one countertooth for locking with the other side of the sheet metal part on opposite inner walls of its U-shaped cross-section; and

[0014] A sealing portion extends from the connecting portion and is used to elastically abut against the upper surface of the liftable sliding glass of the vehicle door to form a seal.

[0015] Preferably, the included angle between the sealing part and the connecting part is greater than or equal to 90° and less than 180°.

[0016] Preferably, the sealing portion includes:

[0017] A base with an L-shaped cross-section;

[0018] A sealing cover connected to one side of the base, the sealing cover being used to abut against the movable glass, and a hollow structure being formed between the sealing cover and the base to impart elastic deformation properties to the sealing cover.

[0019] Preferably, the sealing part further includes a second connecting rail connected to the other side of the base, and the inner wall of the second connecting rail is provided with corrugations for forming line contact with the sealing cover when it is deformed by pressure.

[0020] Preferably, the connecting portion is provided with a metal or rigid plastic skeleton that provides reinforcement. The skeleton extends at least along the length of the first connecting rail to provide rigidity and maintain its clamping force on the vehicle sheet metal.

[0021] Preferably, the connecting portion further includes an outer sealing lip that extends obliquely from the first connecting rail toward the sealing portion and is configured to abut against the side of the movable glass.

[0022] Preferably, it further includes an outer water cutter disposed on the outside of the sealing portion, wherein the base is configured to be nested within the inner top surface of the outer water cutter to serve to shield and guide rainwater.

[0023] Preferably, the sealing part further includes a sealing strip, which extends fixedly from the sealing part and abuts against the inner side of the outer water cutter at an angle upward, so as to seal the gap between the base and the outer water cutter.

[0024] Preferably, a wear-resistant layer is integrally formed on the surface of the sealing cover that contacts the moving glass through a co-extrusion process; and the included angle between the sealing part and the connecting part is equal to 90°.

[0025] Preferably, a cured wear-resistant layer is sprayed onto the surface of the sealing cover that contacts the movable glass; and the included angle between the sealing part and the connecting part is greater than 90° and less than 180°, so as to provide an open working space for the sealing cover during spraying.

[0026] The present invention has the following beneficial effects:

[0027] The sealing system of this application is constructed as a multi-layered waterproof barrier, which includes: an outer water shear; an outer sealing lip; and a sealing cover as the main seal. Rainwater is first blocked and guided by the outer water shear, residual water flow and airflow are further isolated and blocked by the outer sealing lip, and finally, the seal formed by the sealing cover and the top of the glass completely isolates the water, ensuring extremely high waterproof reliability.

[0028] This invention employs a snap-fit ​​structure formed by a first connecting rail and its inner lip and reverse teeth to securely fix the glass guide channel to the vehicle body sheet metal in a non-penetrating manner. This method completely avoids drilling holes in the vehicle body, protecting the integrity of the sheet metal and the anti-corrosion layer, thereby eliminating the risk of water leakage, wind noise, and rust caused by gaps in the connection holes.

[0029] The wear-resistant layer on the surface of the sealing cover significantly reduces frictional resistance and noise during the raising and lowering of the glass, making operation smoother and quieter. At the same time, the hollow sealing cover structure and corrugated design not only provide excellent sealing elasticity, but also avoid adhesion and abnormal noise problems that may occur during long-term use or at high temperatures, thus extending the effective service life of the sealing system.

[0030] Because the glass guide channel in the door top sealing system of this application is not installed on the vehicle body, door, or frame sheet metal parts using fasteners such as rivets, the installation of the glass guide channel will not damage its own structure or the vehicle body sheet metal parts due to rivets. This makes it less likely for gaps to appear at the connection between the glass guide channel, the body sheet metal parts, and the rivets, thus preventing water leakage and dripping. The "one-click" snap-fit ​​installation method eliminates the need for complex processes such as drilling, applying glue, tightening screws, or riveting, significantly simplifying the assembly process on the final assembly line, shortening working hours, reducing manufacturing costs, and ensuring consistent installation quality.

[0031] The wear-resistant layer on the surface of the sealing cover can be achieved through two preferred methods:

[0032] When a low-friction material is integrally formed with the sealing cover body using a co-extrusion process, the included angle between the sealing part and the connecting part is set to 90°. This angle provides ideal conditions for the design of the co-extrusion die and the stable extrusion of the material;

[0033] When a spray coating needs to be applied to the surface of the sealing cover, the included angle is set to be greater than 90° and less than 180°. This larger angle keeps the sealing cover in an "open" state, providing ample working path and space for the spray nozzle, thereby ensuring the uniformity and integrity of the coating.

[0034] This intelligent linkage design of structure and process enables the invention to flexibly select the optimal manufacturing solution based on cost, performance and production needs, greatly improving the production efficiency and application scope of the product, especially meeting the stringent requirements of frameless car doors for high performance and exquisite appearance. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 is a schematic diagram of the structure of the present invention;

[0037] Figure 2 is a cross-sectional view of the present invention;

[0038] Figure 3 is an enlarged view of point A in Figure 2;

[0039] Figure 4 is a schematic diagram of the structure of a glass guide groove according to the present invention.

[0040] Figure 5 is a schematic diagram of another glass guide groove in this invention.

[0041] 1. Moving glass; 2. External water cutter; 3. Spacer strip; 4. Base; 5. Sealing strip; 6. Sealing cover; 7. First connecting rail; 8. Inner lip; 9. Back teeth; 10. Outer sealing lip; 11. Second connecting rail; 12. Frame; 13. Wear-resistant layer; 14. Wavy texture. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] The present invention relates to a door top sealing system designed to improve the sealing performance and durability of vehicle doors, particularly frameless doors. When the window is closed, the upper end of the movable glass 1 contacts the sealing cover 6 in the glass guide channel, causing the sealing cover 6 to undergo elastic deformation, effectively reducing the gap between the movable glass 1 and the sealing cover 6, and enhancing the sealing effect.

[0046] A door top sealing system, as shown in Figure 1, includes a glass guide channel. The glass guide channel includes a sealing part and a connecting part. There is an included angle between the sealing part and the connecting part, and the included angle is greater than or equal to 90° and less than 180°. The connecting part can be used to fix and connect with the vehicle sheet metal parts. The sealing part is used to abut against the upper surface of the movable glass 1.

[0047] The glass guide channel of this invention is typically manufactured using an integral extrusion molding process to ensure the continuity and consistency of its cross-sectional profile. The main body, including the base 4, sealing cover 6, first connecting rail 7, and second connecting rail 11, can be made of ethylene propylene diene monomer (EPDM) rubber, which has excellent weather resistance, aging resistance, and elasticity, or it can be made of thermoplastic elastomer (TPE) or polyvinyl chloride (PVC), depending on specific cost and performance requirements.

[0048] The sealing part is mainly composed of a base 4, a sealing strip 5, a second connecting rail 11, and a sealing cover 6; the connecting part is composed of a first connecting rail 7, an inner lip 8, and a reverse tooth 9.

[0049] As shown in Figure 4, the connecting part is provided with an inner skeleton 12 that extends into the sealing part. This design can help to make the included angle between the sealing part and the connecting part more stable and reduce the deformation of the included angle caused by factors such as high temperature and aging. As shown in Figure 5, the connecting part is provided with a U-shaped inner skeleton 12, but it does not extend into the sealing part, which facilitates the spraying of the sealing part and allows the angle to be freely adjusted within the range of 90°-180°.

[0050] Specifically, the first connecting rail 7 and the second connecting rail 11 form a certain angle. Taking Figure 4 as an example, during the calculation, half of the wall thickness of the first connecting rail 7 is drawn along the vertical direction to form the first center line, and half of the wall thickness of the second connecting rail 11 is drawn along the horizontal direction to form the second center line. The angle between the first center line and the second center line can be obtained by measuring.

[0051] The skeleton 12, acting as a reinforcement, provides rigidity and shape retention to the connection, ensuring secure clamping to the vehicle's sheet metal after installation. The skeleton 12 is typically made of metal, such as stamped steel or aluminum strip, to provide sufficient structural strength. During manufacturing, the metal skeleton 12 is encased within the rubber material of the first connecting rail 7 via a co-extrusion process. In some bending applications requiring high flexibility, the skeleton 12 can also be a segmented metal insert or a high-hardness reinforced plastic.

[0052] In this invention, the top surface of the movable glass 1 is sealed by setting a glass guide channel. The connecting part is responsible for the main function of fixing it to the vehicle sheet metal. However, in this process, fasteners such as rivets, which would damage the vehicle sheet metal and the glass guide channel, are not used to connect the vehicle sheet metal and the glass guide channel. Therefore, the glass guide channel in the door top sealing system of this application can not only seal the top surface of the movable glass 1 in the door, but also prevent water leakage caused by holes at the connection between the vehicle sheet metal and the glass guide channel. Since there is an angle between the sealing part and the connecting part, and the angle is greater than or equal to 90° and less than 180°, the angle between the sealing part and the connecting part can be adjusted according to different processes.

[0053] Preferably, as shown in Figures 2, 3, and 4, the included angle is 90°, and the surface of the sealing part is formed by co-extrusion of a low-friction coefficient sliding material to form a wear-resistant layer 13. The co-extrusion process is chosen because when the included angle is 90°, the wear-resistant coating is obstructed by the outer sealing lip 10 during spraying, making it difficult to spray evenly onto the outer surface of the sealing cover 6. However, by using a low-friction coefficient sliding material co-extruded with the sealing part, the aforementioned technical problem is overcome. Therefore, the sealing part does not need to be unfolded, and the included angle between the sealing part and the connecting part can be maintained at 90°.

[0054] The low-friction coefficient lubricant is prepared according to the formula and preparation method mentioned in any embodiment of Chinese invention patent CN117186524A, preferably the formula and process of embodiment 8.

[0055] The advantages of using a low-friction coefficient lubricant co-extruded with the sealing part in the wear-resistant layer 13 are as follows: it significantly reduces the noise generated when the moving glass 1 contacts the sealing part during lifting and lowering, and also reduces wear on the moving glass 1 and the sealing part in the glass guide channel, extending their service life. Secondly, the lubricant has good wear resistance and aging resistance, which helps maintain long-term sealing performance and reduces maintenance costs. In addition, the low-friction coefficient lubricant can also improve waterproof performance and reduce the possibility of rainwater penetration, which is important for keeping the vehicle interior dry and preventing moisture from corroding the vehicle's electronic equipment and interior trim.

[0056] Preferably, as a novel design, as shown in Figure 5, the angle between the sealing part and the connecting part of this structure is greater than 90° and less than 180°. This is because the spraying action requires the surface of the sealing part to be unfolded, and sufficient space must be reserved for the coating spraying action on the surface of the sealing part. Therefore, the angle between the sealing part and the connecting part must be greater than 90° and less than 180°. At this time, the outer sealing lip 10 will not block the spraying of the coating onto the surface of the sealing part. Therefore, the wear-resistant coating can be formed by directly spraying the wear-resistant coating onto the surface of the sealing part. During the frequent opening and closing of the car window, the sealing part in the glass guide channel is less prone to damage and leakage due to the wear-resistant coating.

[0057] Those skilled in the art will understand that after the wear-resistant coating is sprayed onto the surface of the sealing strip, the solvent is evaporated at high temperature, transforming it into a dense, firm, and complete solid film on the surface of the sealing strip. The wear-resistant coating of this application can be directly purchased on the market, and those skilled in the art do not need to make any inventive effort. As an example of a wear-resistant coating, a polyurethane coating can be selected as the wear-resistant coating for the sealing strip. A water-based polyurethane coating (i.e., waterborne polyurethane) can be selected, using water as the solvent to replace traditional organic dispersion solvents such as xylene and acetone, resulting in a relatively low overall VOC content of the sealing strip.

[0058] Preferably, the sealing part includes a base 4 with an L-shaped and strip-shaped cross section and a sealing cover 6 fixedly connected to the base 4. The base 4 and the sealing cover 6 are hollow, and the sealing cover 6 has elastic deformation properties.

[0059] The base 4 provides support for the sealing cover 6, allowing it to be structurally attached. The base 4 also possesses a certain degree of rigidity, enabling it to absorb the force exerted when the movable glass 1 moves upward. The sealing cover 6 is hollow between itself and the base 4, and it exhibits elastic deformation properties. When the movable glass 1 moves upward and contacts the sealing cover 6, the sealing cover 6 deforms and wraps around the top of the movable glass 1 until it comes into contact with the corrugated pattern 14. At this point, the gap between the movable glass 1 and the sealing cover 6 decreases, improving the sealing effect when the movable glass 1 closes the car door.

[0060] The corrugated pattern 14 changes the contact method between the sealing cover 6 and the inner wall of the second connecting rail 11 from surface contact to line contact. This is because rubber becomes sticky in high temperatures. When the moving glass 1 impacts the buffer sealing cover 6 repeatedly, it can cause the sealing cover 6 to stick to the bottom wall of the second connecting rail 11. The corrugated pattern 14 can effectively prevent the sealing cover 6 from sticking to the bottom wall of the second connecting rail 11 and from producing abnormal noise. At the same time, when opening and closing the door or crossing a bumpy road, the sealing cover 6 can effectively buffer the moving glass 1 and prevent abnormal noise.

[0061] Preferably, it also includes an outer water cutter 2, and a spacer 3 of the same length is fixedly connected to the inner side of the outer water cutter 2. The base 4 can be embedded between the spacer 3 and the inner top surface of the outer water cutter 2.

[0062] The outer water-cutting shear 2 primarily serves to provide an additional layer of waterproofing before the sealing between the movable glass 1 and the sealing cover 6. The opening between the outer water-cutting shear 2 and the movable glass 1 is located below the top surface of the movable glass 1, thus preventing rainwater from flowing directly between the movable glass 1 and the sealing cover 6 when it falls from the sky. Simultaneously, the outer water-cutting shear 2 also shields the glass guide channel, enhancing the aesthetics of the vehicle's sheet metal components.

[0063] Preferably, the sealing part further includes a sealing strip 5, which is fixedly connected to one side of the second connecting rail 11 and faces the side of the connecting part. The sealing strip 5 is inclined upward and abuts against the outer water cutter 2.

[0064] The sealing strip 5 is designed to further reduce the gap between the base 4 and the outer water cutter 2 when the sealing part is fitted with the outer water cutter 2, thereby enhancing its waterproof performance.

[0065] Preferably, the connecting part includes a first connecting rail 7 with a U-shaped cross-section. A plurality of inner lips 8 are fixedly connected to one inner sidewall of the first connecting rail 7, and a plurality of reverse teeth 9 are fixedly connected to the other inner sidewall of the first connecting rail 7. When the connecting part is connected to a vehicle sheet metal part, the vehicle sheet metal part is embedded in the first connecting rail 7, and the reverse teeth 9 and inner lips 8 abut against the sides of the vehicle sheet metal part, thus fixing the sealing system to the vehicle sheet metal. A rigid frame 12 is provided inside the first connecting rail 7 to improve the deformation resistance of the sealing system, making the installation of the sealing system more secure.

[0066] The U-shaped first connecting rail 7 replaces the conventional glass guide channel structure, avoiding the use of fasteners such as rivets that would damage the vehicle sheet metal and the glass guide channel. This prevents damage to the vehicle sheet metal and the glass guide channel, which could lead to water leakage at the connection point when fasteners such as rivets pass through the vehicle sheet metal and the glass guide channel. In addition, the inner lip 8 and several reverse teeth 9 also serve to connect the first connecting rail 7 to the vehicle sheet metal, resulting in better connection strength and sealing effect when the first connecting rail 7 is connected to the vehicle sheet metal.

[0067] Preferably, the connecting part further includes an outer sealing lip 10, which is fixedly connected to the side of the first connecting rail 7 facing the sealing part, and the outer sealing lip 10 is inclined upward, and the outer sealing lip 10 is used to abut against the end face of the movable glass 1.

[0068] The outer sealing lip 10 provides a third layer of waterproofing for the top sealing system of the vehicle door. This allows rainwater to be further blocked by the outer sealing lip 10 against the end face of the movable glass 1 after it has penetrated the gap between the movable glass 1 and the sealing cover 6. This prevents rainwater from directly entering the vehicle interior, ensuring the vehicle remains dry and improving the waterproof performance of the sealing system.

[0069] During installation, align the connecting part of the glass guide channel, i.e., the U-shaped first connecting rail 7, with the edge of the sheet metal flange on the door window frame or the top of the vehicle body, and press firmly to complete the assembly. During this process, the U-shaped opening of the first connecting rail 7 serves as a guide.

[0070] Multiple inner lips 8 on the inner wall first come into contact with the sheet metal. They have a certain degree of elasticity and can accommodate the thickness tolerance of the sheet metal while providing initial positioning and sealing.

[0071] As it is pressed further in, the edge of the sheet metal part will pass over the inverted teeth 9. The special angle design of the inverted teeth 9 makes it easy to slide in but not easy to come out. Its tip or tooth surface will press tightly against the other side surface of the sheet metal part, working together with the inner lip 8 to generate a strong clamping force, thereby firmly fixing the entire glass guide channel to the vehicle body.

[0072] It should be understood that the present invention is not limited to the precise structure shown in the accompanying drawings. For example:

[0073] The number, shape, and distribution of the inner lip edge 8 and the reverse teeth 9 can be adjusted according to the thickness of the sheet metal to be clamped and the required clamping force. For example, for thicker sheet metal, the angle of the reverse teeth can be smaller; for applications requiring greater pull-out force, the number of reverse teeth can be increased.

[0074] The cross-sectional shape of the sealing cover 6 can also be diversified. For example, it can be a double cavity structure to provide more complex compression and rebound characteristics, or it can have a specific texture preset on its contact surface with the glass to improve the sealing effect.

[0075] In some designs, where waterproofing requirements are extremely high, the sealing strip 5 and the outer water cutter 2 can be designed to have a tighter interlocking structure, or even be co-extruded into a single component.

[0076] Through the above supplementary explanation, the technical solution, internal working logic, and significant advantages of this invention compared to existing technologies become clearer. This invention systematically solves the sealing problem at the top of frameless car doors through an ingenious non-destructive installation structure and multiple sealing designs.

[0077] In summary, the door top sealing system of the present invention aims to improve the sealing performance and durability of vehicle doors, especially frameless doors. When the window is closed, the upper end of the movable glass 1 contacts the sealing cover 6 in the glass guide channel, causing the sealing cover 6 to undergo elastic deformation, effectively reducing the gap between the movable glass 1 and the sealing cover 6, and enhancing the sealing effect.

[0078] During the upward movement of the movable glass 1, the outer sealing lip 10 will first contact the inner end face of the movable glass 1. The lip 10 is inclined upward and is flexible, which can smoothly guide the glass and form the first dynamic seal, effectively blocking most of the oncoming airflow and rainwater when traveling at high speed.

[0079] As the movable glass 1 continues to rise, just before its top edge contacts the sealing cover 6, the outermost water shear 2 of the system acts like an eaves, providing shelter. It not only protects the underlying sealing structure from direct sunlight and debris but also guides and drains rainwater from the roof outwards, reducing the amount of water reaching the core sealing area at its source.

[0080] When the upper surface of the movable glass 1 abuts against the sealing cover 6, since the base 4 and the sealing cover 6 are hollow, and the sealing cover (6) itself has excellent elasticity, it will undergo controlled elastic deformation under the pressure of the glass, tightly wrapping the top contour of the glass, forming a continuous and pressure-uniform main sealing surface, achieving the effect of isolating water and noise.

[0081] After the glass is fully closed, the pressurized sealing cover 6 may come into contact with the inner wall of the second connecting rail 11. The corrugated pattern 14 on this inner wall greatly reduces the contact area by changing the surface contact to a line contact. This effectively prevents the rubber from softening and sticking in hot weather, avoiding abnormal noises or tearing when the window is opened; at the same time, it also provides cushioning for the glass under bumpy road conditions, reducing vibration noise.

[0082] The glass guide channel installation method of this invention avoids the use of fasteners such as rivets, reduces damage to the vehicle body sheet metal, lowers the risk of gaps at the connection, and effectively prevents water leakage and dripping. The first connecting rail 7, inner lip 8, and reverse teeth 9 achieve a fixed connection between the glass guide channel and the vehicle body sheet metal, ensuring the connection strength and sealing effect of the sealing system and reducing the possibility of water leakage.

[0083] Regarding the processing technology of the sealing cover 6, the present invention provides two different processing methods. If a low-friction coefficient lubricant is to be co-extruded to form a co-extruded lubricant, the included angle between the sealing part and the connecting part should be kept at 90° to ensure uniform material distribution and low friction characteristics. Conversely, if a coating is to be sprayed on the surface of the sealing cover 6, the sealing cover 6 needs to be kept in an open state, and the included angle should be kept within the range of greater than 90° and less than 180° to facilitate uniform spraying and curing of the coating, while not affecting the production and processing of the glass guide channel.

[0084] This design not only improves the sealing performance of the door but also enhances its durability and ease of maintenance. By reducing friction between the movable glass 1 and the sealing cover 6, it reduces noise and wear during the raising and lowering of the movable glass 1, extending the service life of the components. At the same time, by optimizing the processing technology of the sealing cover 6, production efficiency and product quality are improved, enabling the door (especially frameless doors) to maintain its aesthetics while also possessing excellent functionality and practicality.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sealing system for the top of a vehicle door, characterized in that, Includes a glass guide channel, the glass guide channel comprising: A connecting portion, the connecting portion including a first connecting rail (7) for snap-fitting to a vehicle sheet metal part, the first connecting rail (7) having a U-shaped cross-section to accommodate the edge of the sheet metal part, and having at least one inner lip (8) for abutting against one side of the sheet metal part and at least one countertooth (9) for locking with the other side of the sheet metal part on opposite inner walls of its U-shaped cross-section; and A sealing part extends from the connecting part and is used to elastically abut against the upper end surface of the liftable sliding glass (1) of the car door to form a seal.

2. The system according to claim 1, characterized in that, The included angle between the sealing part and the connecting part is greater than or equal to 90° and less than 180°.

3. The system according to claim 1 or 2, characterized in that, The sealing part includes: A base with an L-shaped cross section (4); A sealing cover (6) is connected to one side of the base (4), the sealing cover (6) is used to abut against the movable glass (1), and a hollow structure is formed between the sealing cover (6) and the base (4) to give the sealing cover (6) elastic deformation properties.

4. The system according to claim 3, characterized in that, The sealing part also includes a second connecting rail (11) connected to the other side of the base (4), and a corrugated pattern (14) is provided on the inner wall of the second connecting rail (11) for forming a line contact with the sealing cover (6) when it is deformed by pressure.

5. The system according to claim 1 or 2, characterized in that, The connecting part is provided with a metal or rigid plastic skeleton (12) that provides reinforcement. The skeleton (12) extends at least along the length of the first connecting rail (7) to provide rigidity and maintain its clamping force on the vehicle sheet metal.

6. The system according to claim 1 or 2, characterized in that, The connecting portion further includes an outer sealing lip (10) that extends obliquely from the first connecting rail (7) toward one side of the sealing portion and is configured to abut against the side of the movable glass (1).

7. The system according to claim 3, characterized in that, It also includes an outer water cutter (2) disposed on the outside of the sealing part, wherein the base (4) is configured to be nested within the inner top surface of the outer water cutter (2) to serve to shield and guide rainwater.

8. The system according to claim 7, characterized in that, The sealing part also includes a sealing strip (5), which extends fixedly from the sealing part and abuts against the inner side of the outer water cutter (2) at an angle to close the gap between the base (4) and the outer water cutter (2).

9. The system according to claim 3, characterized in that, On the surface of the sealing cover (6) that contacts the moving glass (1), a wear-resistant layer (13) is integrally formed by co-extrusion process; and the included angle between the sealing part and the connecting part is equal to 90°.

10. The system according to claim 3, characterized in that, A wear-resistant layer (13) is sprayed onto the surface of the sealing cover (6) that contacts the movable glass (1); and the included angle between the sealing part and the connecting part is greater than 90° and less than 180°, so as to provide an open working space for the sealing cover (6) during spraying.

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