Roof side seal cross section for frameless door system

Abstract

The utility model relates to a roof side sealing strip section structure for frameless door system relates to the technical field of automobile body sealing, including the soft lap joint lip and support hard glue, the soft lap joint lip is semicircular, it covers in the joint of interior trim guard plate in the lap joint mode, one end of soft lap joint lip is equipped with the composite structure lip, support hard glue is equipped with U-shaped structure, the inside of U-shaped structure is clamped on the body side wall stop mouth sheet metal, the inside of soft lap joint lip is connected to the outside top of U-shaped structure, one end of U-shaped structure extends outward, the end part that U-shaped structure extends outward is equipped with sealing lip, the outward extending part of U-shaped structure and support hard glue side and composite structure lip form the clamping space of door glass. Realize high integration and part simplification, reduce the comprehensive cost greatly, optimize assembly technology, improve production efficiency, improve appearance quality and sealing reliability, integrate multifunction in an all-in-one, eliminate the risk of abnormal sound and corrosion.

Description

Technical Field

[0001] This utility model relates to the field of automotive body sealing technology, and in particular to a cross-sectional structure of a roof-side sealing strip for frameless door systems. Background Technology

[0002] In frameless door design, the roof sealing system is a key technical challenge. Currently, the mainstream solution in the industry is a split dual-seal strip structure, with a typical design as follows: As attached Figure 2 As shown, a traditional sealing system consists of two independently installed sealing strips: 1. Assembly of Bubble-tube Sealing Strip and Metallic Trim Strip: This assembly is first fixed to a dedicated metallic trim strip via snap-fit ​​or adhesive bonding. This metallic trim strip serves both decorative and mounting frame functions. Then, the entire assembly is installed onto the side panel of the vehicle body. The bubble tube (or sponge adhesive) on this sealing strip is pressed against the top of the glass after the door is closed and the glass is raised, forming the main sealing interface. Its main functions are sealing, sound insulation, and providing flexible clamping force.

[0003] 2. Side panel sealing strip: This sealing strip is independently installed on the flange of the side panel of the vehicle body. Its main function is not sealing, but rather supporting and limiting the door glass from the inside when the door is closed, preventing excessive shaking of the glass due to wind pressure and vibration during vehicle operation, and improving the static and dynamic stability of the glass.

[0004] This split design, consisting of "one seal and one support," achieves basic functions, but its inherent system complexity and the matching problems between parts bring about many engineering and quality defects.

[0005] Its main defects are as follows: 1. High number of parts and high system cost: This system requires two independent sealing strips, a dedicated bright metal trim strip, and corresponding mounting clips and other accessories. The increased number of parts directly leads to higher mold costs, material costs, management costs, and assembly costs.

[0006] 2. The assembly process is complex and inefficient: First, the bubble tube sealing strip needs to be assembled onto the metal trim strip to form a sub-assembly. Then, this sub-assembly is installed onto the side panel of the vehicle body. Finally, the side panel sealing strip is installed separately. The entire process involves numerous steps, consuming significant production line time and labor costs.

[0007] 3. Significant issues with matching and aesthetics: The matching gaps and surface differences between the metallic bright trim strips and the body, as well as between the two sealing strips, are difficult to control, which can easily result in visual discontinuity or unevenness, affecting the overall appearance quality and premium feel of the vehicle.

[0008] 4. Potential noise and corrosion risks: Friction between the metallic trim and the body panels, as well as with other parts, may produce noise under vehicle vibration. Additionally, gaps at the joints of multiple parts can become breeding grounds for moisture and dirt, increasing the risk of corrosion in the metal components over the long term.

[0009] 5. Poor coordination between sealing and support: As they are two independent flexible bodies, they may not be able to achieve perfect coordination when responding to dynamic deformation of the glass. Under extreme conditions, the relative positions of the glass's support and sealing points may change slightly, affecting sealing stability or generating wind noise.

[0010] 6. Disadvantages of lightweighting: The use of bright metallic trim adds unnecessary vehicle weight, which goes against the technological trend of lightweighting in automobiles. Utility Model Content

[0011] To address the aforementioned issues, a cross-sectional structure for the roof-side sealing strip of a frameless door system is proposed.

[0012] The technical solution of this utility model is as follows: a cross-sectional structure of a roof side sealing strip for a frameless car door system, including a soft overlapping lip and a supporting hard rubber. The soft overlapping lip is semi-circular and covers the joint of the interior trim panel in an overlapping manner. One end of the soft overlapping lip is provided with a composite structure lip. The supporting hard rubber is provided with a U-shaped structure. The inner side of the U-shaped structure is clamped on the sheet metal of the side panel of the car body. The top of the outer side of the U-shaped structure is connected to the inner side of the soft overlapping lip. One end of the U-shaped structure extends outward, and the outwardly extending end of the U-shaped structure is provided with a sealing lip. The outwardly extending part of the U-shaped structure, together with the side of the supporting hard rubber and the composite structure lip, forms a clamping space for the car door glass.

[0013] Preferably, a steel strip is embedded inside the supporting rigid rubber.

[0014] Preferably, the U-shaped structure supporting the hard rubber has a first clamping lip and a second clamping lip on its inner side. The first clamping lip and the second clamping lip together form a clamping channel, which is used to clamp the sheet metal of the side panel of the vehicle body.

[0015] Preferably, the supporting hard rubber has an outer soft lip near the sealing lip, and the outer soft lip extends outward from the end away from the sealing lip. The outwardly extended part gently overlaps with the R-corner area of ​​the body side panel sheet metal. An inner sealing lip is provided at the opening of the supporting hard rubber near the U-shaped structure.

[0016] Preferably, the supporting hard rubber has a buffer sealing lip on the side away from the outer soft lip.

[0017] Preferably, the soft overlapping lip further includes a composite structural connecting rib, one end of which is connected to the composite structural lip, and the other end is connected to the outer surface of the supporting hard rubber. The composite structural connecting rib, the composite structural lip, and the outer surface of the supporting hard rubber wrap together to form a hollow bubble tube structure.

[0018] The beneficial effects of this utility model are as follows: This utility model directly installs the sealing strip on the side panel stop of the vehicle body, completely eliminating the separate metal bright trim strip and the foam tube sealing strip assembly assembled with it, and integrating them into a single, co-extruded sealing strip cross-section. By reducing the number of parts and simplifying the assembly process, it effectively reduces the system's mold cost, material cost, logistics cost, and assembly manufacturing cost. The original multi-step assembly process is simplified to a one-time installation, greatly improving assembly efficiency and consistency. By eliminating the external metal bright trim strip, matching gap and surface difference problems are avoided, making the roofline simpler and smoother. At the same time, the integrated design ensures that the sealing lip and support relative to the glass remain fixed, providing a more coordinated and stable sealing and support effect. This ensures high sealing performance and stable support capacity under low glass lifting resistance. By eliminating the metal bright trim strip and reducing friction between parts, the possibility of abnormal noise caused by this assembly is fundamentally eliminated, and the risk of water accumulation and corrosion is reduced. Attached Figure Description

[0019] Figure 1 This is a side view of the vehicle described in this utility model; Figure 2 for Figure 1 AA cross-sectional view of existing technology in China; Figure 3 for Figure 1 AA cross-sectional view of this embodiment; Figure 4 This is a schematic diagram of the cross-sectional structure of the roof-side sealing strip of the present invention used in frameless car door systems.

[0020] The component names corresponding to the various reference numerals in the diagram are as follows: 1. Sealing strip; 11. Soft overlapping lip; 111. Composite structure lip; 112. Composite structure connecting rib; 12. Supporting hard rubber; 121. Steel strip; 122. First clamping lip; 123. Second clamping lip; 124. Inner sealing lip; 125. Outer soft lip; 126. Sealing lip; 127. Buffer sealing lip; 2. Interior trim panel; 3. Door glass; 4. Body side panel sheet metal. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0022] refer to Figure 3 , 4 As shown in the figure, this application discloses a cross-sectional structure of a roof-side sealing strip for a frameless door system, including a sealing strip 1. The sealing strip 1 includes a soft overlapping lip 11 and a supporting hard rubber 12. The soft overlapping lip 11 is semi-circular and overlaps the joint of the interior trim panel 2, effectively concealing the assembly gap. The angle, length, and size of the soft overlapping lip 11 can be parametrically adjusted according to the shape of the interior trim panel 2, ensuring excellent adaptability and perceived quality. One end of the soft overlapping lip 11 is provided with a composite structure lip 111.

[0023] The supporting rigid rubber 12 has a U-shaped structure. The inner side of the U-shaped structure is clamped to the sheet metal 4 of the side panel of the vehicle body. The top of the outer side of the U-shaped structure is connected to the inner side of the soft overlapping lip 11. One end of the U-shaped structure extends outward, and the outwardly extending end of the U-shaped structure has a sealing lip 126. The outwardly extending part of the U-shaped structure, together with the side of the supporting rigid rubber 12 and the composite structure lip 111, forms the clamping space of the door glass 3. When the door glass 3 is raised to the closed position, the composite structure lip 111 and the sealing lip 126 work together to form a flexible clamping and support for the door glass 3 and provide the main sealing force. A low-friction coefficient coating is provided on the contact surfaces of the composite structure lip 111 and the sealing lip 126 with the door glass 3. This design significantly reduces the resistance during the raising and lowering of the door glass 3 while ensuring sealing and support force, improving the smoothness of operation and reducing abnormal noise and motor load.

[0024] The internal structure of the supporting hard rubber 12 has a steel strip 121 embedded in it, which further enhances the stability of the clamping and the overall support rigidity, ensuring that the sealing strip 1 will not collapse or twist during long-span installation and will fit closely to the body contour.

[0025] The U-shaped structure supporting the hard rubber 12 has a first clamping lip 122 and a second clamping lip 123 on its inner side. The first clamping lip 122 and the second clamping lip 123 together form an efficient clamping channel, which is used to clamp the body side panel sheet metal 4. This clamping structure can be adaptively adjusted according to the actual shape of the body side panel sheet metal 4, and is not limited to the double lip form shown in the figure.

[0026] An outer soft lip 125 is provided on the outer side of the supporting hard rubber 12 near the sealing lip 126. The end of the outer soft lip 125 away from the sealing lip 126 extends outward, and the outwardly extended part smoothly overlaps with the R-corner area of ​​the body side panel sheet metal 4. This design eliminates the harsh gap between hard parts, significantly improving the appearance and overall look. An inner sealing lip 124 is provided on the supporting hard rubber 12 near the opening of the U-shaped structure. The outer soft lip 125 and the inner sealing lip 124 together form a sealed and waterproof channel. This channel can effectively prevent external water from entering the body through the gap of the body side panel sheet metal 4, and at the same time, it can isolate wind noise, avoiding potential corrosion and abnormal noise caused by internal water accumulation.

[0027] A buffer sealing lip 127 is provided on the side of the supporting hard rubber 12 away from the outer soft lip 125. The sealing lip 126 and the buffer sealing lip 127 together form the first line of sealing defense of the system, effectively isolating wind noise, dust and rainwater during daily driving. Another key function of the buffer sealing lip 127 is to buffer and stop when the door glass 3 rises to the mechanical upper limit, preventing the door glass 3 from impacting the hard structure and causing noise and damage. At the same time, it can effectively buffer the minor vibrations of the door glass 3 during driving and raising and lowering.

[0028] The soft overlapping lip 11 also includes a composite structure connecting rib 112. One end of the composite structure connecting rib 112 is connected to the composite structure lip 111, and the other end is connected to the outer side of the supporting hard rubber 12. The composite structure connecting rib 112, the composite structure lip 111, and the outer side of the supporting hard rubber 12 wrap together to form a hollow bubble tube structure.

[0029] In extreme situations (such as heavy rain or high-pressure water jet washing), if the first line of defense formed by the sealing lip 126 and the buffer sealing lip 127 temporarily fails, the hollow bubble tube structure and the composite structure lip 111 will act as a second waterproof barrier, tightly adhering to the door glass 3. Simultaneously, the unique shape of this structure effectively guides and drains intruding rainwater to the outside of the door, preventing water accumulation from damaging the vehicle's interior and greatly improving the system's reliability and durability.

[0030] The specific working principle is as follows: the functions of the traditional separate "bubble tube sealing strip" and "stop support sealing strip" are integrated into a single, co-extruded sealing strip section. Replacing the original bubble tube sealing strip, it features a hollow bubble tube or a dense sealing lip, responsible for pressing against the glass to form a dynamic seal. Replacing the original stop seal strip, it is typically made of a higher-hardness rubber material or co-extruded plastic components, responsible for firmly supporting the glass from the inside and limiting its movement. The metal trim strip, which serves as both the mounting base and decorative element, is completely eliminated. The sealing strip no longer needs to be assembled onto an additional metal component; instead, it connects directly to the vehicle body sheet metal through its own snap-fit ​​structure. This is not merely a reduction in parts, but a complete revolution in the installation hierarchy and concept. The entire sealing system is secured via a single mounting point (i.e., the side panel stop). The traditional dual mounting paths (bright trim path and stop path) are simplified into a single, reliable mounting path. This ensures the uniqueness and stability of the relative positions between the sealing strip and the vehicle body, and between the sealing strip and the glass, eliminating matching problems caused by accumulated manufacturing tolerances at the two mounting points. Since the sealing and support functions are integrated into a single flexible body, their relative positions and stress relationships can be simulated and optimized in an integrated manner during the design phase.

[0031] When the glass is pressed in, the sealing and supporting parts deform together as a whole, avoiding mutual interference or functional cancellation that may occur in a split structure. The stiffness of the supporting part and the compressive load of the sealing part can be precisely designed to ensure sufficient support to prevent glass vibration while optimizing the resistance of glass lifting and lowering and ensuring excellent NVH performance.

[0032] The integrated cross-sectional structure incorporates dedicated drainage and flow guidance channels. These channels can quickly guide liquids flowing down the glass surface or accidentally intruding to the ends of the sealing strip or pre-designed drainage holes for discharge, preventing water accumulation at the junction of the sealing strip and the body sheet metal, thereby improving the system's durability and corrosion resistance.

[0033] The beneficial effects are as follows: This utility model directly installs the sealing strip on the side panel stop of the vehicle body, completely eliminating the separate metal bright trim strip and the foam tube sealing strip assembly assembled with it, and integrating them into a single, co-extruded sealing strip cross-section. By reducing the number of parts and simplifying the assembly process, it effectively reduces the system's mold cost, material cost, logistics cost, and assembly manufacturing cost. The original multi-step assembly process is simplified to a one-time installation, greatly improving assembly efficiency and consistency. By eliminating the external metal bright trim strip, matching gap and surface difference problems are avoided, making the roofline simpler and smoother. At the same time, the integrated design ensures that the sealing lip and support relative to the glass remain fixed, providing a more coordinated and stable sealing and support effect. This ensures high sealing performance and stable support capacity under low glass lifting resistance. By eliminating the metal bright trim strip and reducing friction between parts, the possibility of abnormal noise caused by this assembly is fundamentally eliminated, and the risk of water accumulation and corrosion is reduced.

[0034] It should be noted that the terms "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. "A plurality of" means two or more. "Installed," "connected," and "joined" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. A cross-sectional structure for a roof-side sealing strip in a frameless door system, characterized in that, Includes a soft overlapping lip (11) and a supporting hard rubber (12). The soft overlapping lip (11) is semi-circular and overlaps the joint of the interior trim panel (2). One end of the soft overlapping lip (11) is provided with a composite structure lip (111). The supporting hard rubber (12) is provided with a U-shaped structure. The inner side of the U-shaped structure is clamped on the sheet metal (4) of the side wall of the vehicle body. The top of the outer side of the U-shaped structure is connected to the inner side of the soft overlapping lip (11). One end of the U-shaped structure extends outward. The end of the U-shaped structure that extends outward is provided with a sealing lip (126). The outward extension of the U-shaped structure, together with the side of the supporting hard rubber (12) and the composite structure lip (111), forms the clamping space of the door glass (3).

2. The cross-sectional structure of the roof-side sealing strip for a frameless door system according to claim 1, characterized in that, The supporting rigid rubber (12) has a steel strip (121) embedded inside.

3. The cross-sectional structure of the roof-side sealing strip for a frameless door system according to claim 1, characterized in that, The U-shaped structure of the supporting hard rubber (12) has a first clamping lip (122) and a second clamping lip (123) on its inner side. The first clamping lip (122) and the second clamping lip (123) together form a clamping channel, which is used to clamp the body side panel sheet metal (4).

4. The cross-sectional structure of the roof-side sealing strip for a frameless door system according to claim 1, characterized in that, The supporting hard rubber (12) is provided with an outer soft lip (125) near the sealing lip (126). The outer soft lip (125) extends outward from the end away from the sealing lip (126), and the outwardly extended part gently overlaps with the R-corner area of ​​the body side panel sheet metal (4). An inner sealing lip (124) is provided at the opening of the U-shaped structure near the supporting hard rubber (12).

5. The cross-sectional structure of the roof-side sealing strip for a frameless door system according to claim 1, characterized in that, The supporting hard rubber (12) has a buffer sealing lip (127) on the side away from the outer soft lip (125).

6. The cross-sectional structure of the roof-side sealing strip for a frameless door system according to claim 1, characterized in that, The soft overlapping lip (11) also includes a composite structure connecting rib (112). One end of the composite structure connecting rib (112) is connected to the composite structure lip (111), and the other end is connected to the outer side of the supporting hard rubber (12). The composite structure connecting rib (112), the composite structure lip (111), and the outer side of the supporting hard rubber (12) wrap together to form a hollow bubble tube structure.

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