A flush frame vehicle door assembly

Abstract

The application discloses a flush frame door assembly, and belongs to the technical field of automobile parts, which comprises a sheet metal part, a decorative plate, a guide rail and a sealing strip, the decorative plate comprises a first side close to a window glass and a second side away from the window glass, the second side edge of the decorative plate is inwardly bent to form an assembly groove matched with the sheet metal of the automobile, the bottom surface of the decorative plate is provided with a plurality of first mounting seats, the guide rail has an overall L-shaped structure, the guide rail comprises an integrally-formed bottom plate and a side plate, the bottom plate has an up-down bent plate structure, the side plate is provided with second mounting seats corresponding to the first mounting seats, the sealing strip is mounted on the guide rail, first buckling members are arranged on the first mounting seats, and the first buckling members are fixed with the sheet metal of the automobile after penetrating through the second mounting seats. The application realizes the integrated rigid connection of the decorative plate, the guide rail and the sheet metal through the penetrating buckling members, significantly improves the structural stability and sealing reliability, greatly simplifies the assembly process and improves the production efficiency.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and in particular to a flush-frame door assembly. Background Technology

[0002] With the continuous improvement of automotive industrial design, flush-frame door structures have become an important development direction for mid-to-high-end models because they eliminate the step difference between the window glass and the door frame, keeping their outer surfaces on the same plane. This significantly improves the overall aesthetics and aerodynamic performance of the vehicle, while effectively reducing the drag coefficient and driving noise. This type of structure typically consists of core components such as door sheet metal parts, trim panels, sealing strips, and glass sliders. Precise assembly and coordinated operation of these components are essential to ensure the sealing, stability, and durability of the door system.

[0003] Relevant prior art, such as Chinese patent application "A flush-frame car door assembly and its installation method", publication number: CN119659493A, discloses a component including sheet metal parts, a decorative panel, a sealing strip, and a glass slider. The decorative panel includes a base strip and a stop strip. One end of the base strip has a horizontal U-shaped structure, referred to as a U-shaped component. The sealing strip includes a U-shaped groove. The base strip is fixed to the sheet metal part; the U-shaped groove of the sealing strip is installed into the U-shaped groove of the base strip; the glass slider is embedded into the U-shaped groove; the bottom plate of the stop strip is attached to the horizontal plate and moved towards the U-shaped component until the buckle is embedded in the slot, and the stop strip and the base strip are engaged. The baffle on the stop strip acts on the long strip of the sealing strip, causing the long strip of the sealing strip to bend into a horizontal L-shaped structure, wherein the first recess of the long strip is located at the bottom of the baffle, and the second recess of the long strip is located at the top of the baffle. Disassembling the decorative panel into two parts facilitates the installation of the sealing strip and the glass slider, and ensures the structural stability and reliability of the decorative panel after installation.

[0004] While existing flush-frame door assemblies have made significant structural advancements, there is still room for improvement in areas such as the rigidity of the connection between the trim panel and the guide rail, the structural strength of the guide rail, the ease of assembly of the sealing strip, and the collaborative working ability between various components. There is an urgent need for a flush-frame door assembly that can achieve a rigid connection and simultaneous fixation of the trim panel, guide rail, and sheet metal, while also possessing high assembly precision, structural stability, and reliable sealing. Utility Model Content

[0005] The technical problem to be solved by this application is to provide a flush frame door assembly that achieves an integrated rigid connection between the decorative panel, guide rail and sheet metal through a through-type first buckle, which significantly improves structural stability and sealing reliability while greatly simplifying the assembly process and improving production efficiency.

[0006] The technical solution adopted in this application is as follows: a flush-frame car door assembly, including sheet metal parts, decorative panels, guide rails and sealing strips. The decorative panel includes a first side close to the car window glass and a second side away from the car window glass. The edge of the second side of the decorative panel is bent inward to form an assembly groove that mates with the car sheet metal. A plurality of first mounting seats are provided on the bottom surface of the decorative panel. The first mounting seats have a U-shaped structure and protrude from the bottom surface of the decorative panel. The guide rail has an overall L-shaped structure and includes an integrally formed bottom plate and a side plate. The bottom plate is a plate structure that is bent vertically. A second mounting seat is provided on the side plate corresponding to the first mounting seat. The sealing strip is installed on the guide rail. A first fastener is provided on the first mounting seat. The first fastener passes through the second mounting seat and is fixed to the car sheet metal.

[0007] Compared with the prior art, the advantage of this application is that a first fastener is provided on the first mounting base. After passing through the second mounting base, the first fastener is fixed to the automotive sheet metal, realizing a direct and rigid connection between the decorative panel, guide rail, and sheet metal parts. This fundamentally solves the problems of assembly error accumulation, relative displacement between components, and vibration and abnormal noise commonly found in split designs, significantly improving the structural rigidity and long-term reliability of the entire door assembly.

[0008] The L-shaped, one-piece molded guide rail provides a stable mounting platform for the sealing strip. The vertically bent base plate structure enhances its rigidity, better bearing and distributing the load from the sealing strip and glass, ensuring the long-term stability of the sealing strip's installation position, thus laying a solid foundation for excellent sealing performance.

[0009] The structural design of this application simplifies complex multi-layer assembly into a single "through" fastening operation. The decorative panel is precisely aligned with the second mounting seat of the guide rail via its first mounting base, and then simultaneously locked by a snap-fit ​​component, greatly simplifying the assembly process, improving the cycle time and efficiency of the production line, and reducing assembly costs.

[0010] In some embodiments of this application, a protruding ridge is provided on the bottom surface of the first side of the decorative panel. The protruding ridge is provided along the edge of the first side of the decorative panel and has an inverted structure. The protruding ridge acts on the sealing strip.

[0011] The inverted structure's protruding ridges work in conjunction with the guide rail to effectively limit and constrain the sealing strip from above, preventing it from shifting, warping, or coming off during vehicle vibration or window lifting. This ensures that the sealing lip of the sealing strip always maintains the correct contact position with the glass, improving sealing reliability.

[0012] In some embodiments of this application, the bottom surface of the decorative panel is provided with a plurality of positioning posts for inserting into the automotive sheet metal, and the automotive sheet metal is provided with positioning holes corresponding to the positioning posts, with one end of the positioning post inserted into the positioning hole of the automotive sheet metal.

[0013] The engagement of the positioning pins and positioning holes provides precise pre-positioning and radial limiting for the decorative panel before the fasteners are tightened, ensuring the relative positional accuracy between the decorative panel and the sheet metal parts, preventing misalignment during final tightening, and simplifying the assembly alignment process.

[0014] In some embodiments of this application, a pad is provided on the outer periphery of the positioning post, the pad fills the gap between the automotive sheet metal and the decorative panel, the pad is a rectangular block structure, and a slot is provided in the middle of the pad for the positioning post to pass through.

[0015] The spacer fills the gap between the decorative panel and the sheet metal parts, eliminating vibration and noise that may be caused by assembly gaps, and further improving assembly stability and NVH performance.

[0016] In some embodiments of this application, the assembly groove has a V-shaped structure, and multiple reinforcing ribs are regularly arranged inside the assembly groove. The reinforcing ribs have an L-shaped structure, and the automotive sheet metal is inserted above the reinforcing ribs.

[0017] The V-shaped mounting groove has a self-guiding function, facilitating the quick insertion and alignment of sheet metal parts. The internal L-shaped reinforcing ribs significantly enhance the structural strength and deformation resistance of the mounting groove, preventing deformation during long-term use or under external forces, and ensuring the firmness of the connection between the trim panel and the vehicle body.

[0018] In some embodiments of this application, the bottom surface of the second mounting base is fitted with the automotive sheet metal, and the top surface of the second mounting base is fitted with the decorative panel.

[0019] The second mounting bracket functions as a connecting bridge, with its top and bottom surfaces tightly fitting the decorative panel and sheet metal, respectively. This ensures effective force transmission between the decorative panel, guide rail, and sheet metal, and precisely controls the interlayer gap, making the connection more stable.

[0020] In some embodiments of this application, the base plate is provided with multiple downwardly recessed mounting grooves, and a second fastener is provided at the mounting groove, and the base plate is fixed to the automotive sheet metal by the second fastener.

[0021] By adding an independent second fastening point to the base plate, the guide rail and sheet metal are directly anchored in another dimension. This creates the advantage of multi-point fixing, greatly enhancing the installation stability of the guide rail body, preventing it from twisting or warping due to stress, and further ensuring the installation accuracy of the sealing strip.

[0022] In some embodiments of this application, a plurality of reinforcing plates are regularly arranged on the top surface of the base plate. The reinforcing plates are arranged along the width direction of the base plate and perpendicular to the top surface of the base plate. The plurality of reinforcing plates are arranged parallel to each other, and the sealing strip is in contact with the reinforcing plates.

[0023] Regularly arranged vertical reinforcing plates are a highly efficient and lightweight reinforcement structure. Without significantly increasing weight and cost, they significantly improve the local bending stiffness and load-bearing capacity of the base plate, while providing a uniform support surface for the sealing strip.

[0024] In some embodiments of this application, the top surface of the side panel is folded outward to form a flange, the second mounting base is set below the flange, and there is a gap between the flange and the decorative panel.

[0025] The flanged design enhances the rigidity and resistance to deformation of the side panel edges. The pre-existing gap between the flange and the decorative panel is an important design feature, providing a buffer space for tolerance absorption and thermal expansion and contraction, thus avoiding rigid interference and frictional noise caused by manufacturing errors or temperature changes.

[0026] In some embodiments of this application, the sealing strip includes a U-shaped strip and a base strip. The inner surface of the U-shaped strip is covered with a wear-resistant layer. The U-shaped strip contacts the glass slider through the wear-resistant layer. One end of the base strip is connected to the U-shaped strip, and the other end of the base strip has a horizontal Y-shaped structure.

[0027] The wear-resistant layer on the inner side of the U-shaped strip directly and effectively reduces the frictional resistance of the glass slider during sliding, ensuring smooth and quiet operation of the window glass, improving the user experience, and reducing wear on the sealing strip, thus extending its service life. The Y-shaped structure of the base strip provides stable support and a contact surface with the guide rail.

[0028] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0029] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0030] Figure 1 This is a schematic diagram of the structure of this application. Figure 1 ; Figure 2 This is a schematic diagram of the structure of this application. Figure 2 ; Figure 3 for Figure 2 Sectional view of section AA; Figure 4 for Figure 2 Sectional view of section BB.

[0031] The specific explanations of the reference numerals in the attached drawings are as follows: 1. Sheet metal part; 2. Decorative panel; 3. Guide rail; 4. Sealing strip; 5. Assembly groove; 6. First mounting base; 7. Base plate; 8. Side plate; 9. Second mounting base; 10. First fastener; 11. Protruding ridge; 12. Positioning post; 13. Positioning hole; 17. Second fastener; 19. Flanged edge; 20. U-shaped strip; 21. Base strip; 22. Glass slider. Detailed Implementation

[0032] The present application will now be described in detail with reference to the accompanying drawings.

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0034] A flush-frame door assembly, embodiment one as follows Figure 1 , Figure 2 As shown: The system includes sheet metal part 1, decorative panel 2, guide rail 3, and sealing strip 4. Decorative panel 2 includes a first side near the window glass and a second side away from the window glass. The edge of the second side of decorative panel 2 is bent inward to form an assembly groove 5 that mates with the automotive sheet metal. Multiple first mounting seats 6 are provided on the bottom surface of decorative panel 2. The first mounting seats 6 have a U-shaped structure and protrude from the bottom surface of decorative panel 2. The guide rail 3 has an overall L-shaped structure and includes an integrally formed base plate 7 and side plates 8. The base plate 7 is a plate structure with vertical bends. The L-shaped integrally formed guide rail 3 provides a stable mounting platform for the sealing strip 4. The vertically bendable base plate 7 structure enhances its rigidity, better bearing and distributing the load from the sealing strip 4 and the glass, ensuring the long-term stability of the sealing strip 4's installation position, thus laying a solid foundation for good sealing performance.

[0035] A second mounting seat 9 is provided on the side panel 8 corresponding to the first mounting seat 6. The sealing strip 4 is mounted on the guide rail 3. A first fastener 10 is provided on the first mounting seat 6. The first fastener 10 passes through the second mounting seat 9 and is fixed to the automotive sheet metal. This achieves a direct and rigid connection between the decorative panel 2, the guide rail 3, and the sheet metal part 1. This fundamentally solves the problems of assembly error accumulation, relative displacement between components, and vibration and abnormal noise commonly found in split designs, significantly improving the structural rigidity and long-term reliability of the entire door assembly.

[0036] The structural design of this application simplifies the complex multi-layer assembly into a single "through" fastening operation. The decorative panel 2 is precisely aligned with the second mounting seat 9 of the guide rail 3 via its first mounting seat 6, and then simultaneously locked by a snap-fit ​​component, which greatly simplifies the assembly process, improves the cycle time and efficiency of the production line, and reduces assembly costs.

[0037] Example 2, as Figures 1 to 4 As shown, a protruding rib 11 is provided on the bottom surface of the first side of the decorative panel 2. The protruding rib 11 is provided along the edge of the first side of the decorative panel 2 and has an inverted structure. The protruding rib 11 acts on the sealing strip 4. Through the coordinated action of the inverted structure of the protruding rib 11 and the guide rail 3, an effective limit and constraint is formed on the sealing strip 4 from above, preventing the sealing strip 4 from shifting, warping, or falling off during vehicle vibration or glass raising and lowering. This ensures that the sealing lip of the sealing strip 4 always maintains the correct contact position with the glass, improving the sealing reliability.

[0038] The bottom surface of the decorative panel 2 is provided with multiple positioning pins 12 for insertion into the automotive sheet metal. Corresponding positioning holes 13 are provided on the automotive sheet metal, and one end of each positioning pin 12 is inserted into a positioning hole 13 in the automotive sheet metal. The cooperation between the positioning pins 12 and the positioning holes 13 provides precise pre-positioning and radial limiting for the decorative panel 2 before the fasteners are tightened, ensuring the relative positional accuracy between the decorative panel 2 and the sheet metal part 1, preventing misalignment during final tightening, and simplifying the assembly alignment operation.

[0039] The positioning post 12 is surrounded by pads that fill the gap between the automotive sheet metal and the decorative panel 2. The pads are rectangular blocks with a slot in the center for the positioning post 12 to pass through. The pads fill the gap between the decorative panel 2 and the sheet metal 1, eliminating vibration and noise that may be caused by assembly gaps, and further improving assembly stability and NVH performance.

[0040] The assembly groove 5 has a V-shaped structure, and multiple reinforcing ribs are regularly arranged inside the assembly groove 5. The reinforcing ribs have an L-shaped structure, and the automotive sheet metal is inserted above the reinforcing ribs. The V-shaped assembly groove 5 has a self-guiding function, which facilitates the quick insertion and centering of the sheet metal part 1. The internal L-shaped reinforcing ribs significantly enhance the structural strength and deformation resistance of the assembly groove 5, preventing deformation during long-term use or under external forces, and ensuring the firmness of the connection between the decorative panel 2 and the vehicle body.

[0041] The bottom surface of the second mounting base 9 is in contact with the automotive sheet metal, and the top surface of the second mounting base 9 is in contact with the decorative panel 2.

[0042] The second mounting base 9 functions as a connecting bridge. Its top and bottom surfaces are tightly fitted to the decorative panel 2 and the sheet metal, respectively, ensuring the effective transmission of force among the decorative panel 2, the guide rail 3, and the sheet metal, and precisely controlling the interlayer gap to make the connection more stable.

[0043] The base plate 7 has multiple downwardly recessed mounting grooves, and second fasteners 17 are provided at these grooves. The base plate 7 is fixed to the automotive sheet metal via the second fasteners 17. Adding independent fixing points for the second fasteners 17 to the base plate 7 achieves direct anchoring of the guide rail 3 to the sheet metal in another dimension. This multi-point fixing provides an advantage, greatly enhancing the installation stability of the guide rail 3 and preventing it from twisting or warping under stress, further ensuring the installation accuracy of the sealing strip 4.

[0044] Multiple reinforcing plates are regularly arranged on the top surface of the base plate 7. These reinforcing plates are positioned along the width of the base plate 7 and perpendicular to its top surface. The reinforcing plates are arranged parallel to each other, and the sealing strip 4 is in contact with and connected to them. This regularly arranged vertical reinforcing plate structure is an efficient and lightweight strengthening structure. Without significantly increasing weight or cost, it significantly improves the local bending stiffness and load-bearing capacity of the base plate 7, while also providing a uniform support surface for the sealing strip 4.

[0045] The top surface of the side panel 8 is folded outward to form a flange 19. The second mounting base 9 is positioned below the flange 19, and there is a gap between the flange 19 and the decorative panel 2. The flange 19 design enhances the rigidity and deformation resistance of the edge of the side panel 8. The reserved gap between the flange 19 and the decorative panel 2 is an important design feature, providing a buffer space for tolerance absorption and thermal expansion and contraction, and avoiding rigid interference and frictional noise caused by manufacturing errors or temperature changes.

[0046] The sealing strip 4 includes a U-shaped strip 20 and a base strip 21. The inner surface of the U-shaped strip 20 is covered with a wear-resistant layer. The U-shaped strip 20 contacts the glass slider 22 through this wear-resistant layer. One end of the base strip 21 is connected to the U-shaped strip 20, and the other end of the base strip 21 has a horizontal Y-shaped structure. The wear-resistant layer on the inner side of the U-shaped strip 20 directly and effectively reduces the frictional resistance of the glass slider 22 during sliding, ensuring smooth and quiet operation of the window glass, improving the user experience, and reducing wear on the sealing strip 4, thus extending its service life. The Y-shaped structure of the base strip provides stable support and a contact surface with the guide rail 3.

[0047] The rest of the contents of Example 2 are the same as those of Example 1.

[0048] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A flush-frame car door assembly, characterized in that, The system includes sheet metal parts (1), decorative panels (2), guide rails (3) and sealing strips (4). The decorative panels (2) include a first side close to the car window glass and a second side away from the car window glass. The edge of the second side of the decorative panels (2) is bent inward to form an assembly groove (5) that cooperates with the car sheet metal. The bottom surface of the decorative panels (2) is provided with multiple first mounting seats (6). The first mounting seats (6) are U-shaped and protrude from the bottom surface of the decorative panels (2). The guide rail (3) is L-shaped in general. The guide rail (3) includes an integrally formed base plate (7) and a side plate (8). The base plate (7) is a plate structure that is bent up and down. The side plate (8) is provided with a second mounting seat (9) corresponding to the first mounting seat (6). The sealing strip (4) is installed on the guide rail (3). The first mounting seat (6) is provided with a first buckle (10). The first buckle (10) passes through the second mounting seat (9) and is fixed to the car sheet metal.

2. The flush-frame door assembly according to claim 1, characterized in that, The bottom surface of the first side of the decorative panel (2) is provided with a protruding ridge (11). The protruding ridge (11) is provided along the edge of the first side of the decorative panel (2). The protruding ridge (11) has an inverted structure and acts on the sealing strip (4).

3. A flush-frame car door assembly according to claim 1, characterized in that, The bottom surface of the decorative panel (2) is provided with a plurality of positioning posts (12) for inserting into the automotive sheet metal. The automotive sheet metal is provided with positioning holes (13) corresponding to the positioning posts (12). One end of the positioning post (12) is inserted into the positioning hole (13) of the automotive sheet metal.

4. A flush-frame door assembly according to claim 3, characterized in that, The outer periphery of the positioning post (12) is provided with pads that fill the gap between the automotive sheet metal and the decorative panel (2). The pads are rectangular blocks with a slot in the middle for the positioning post (12) to pass through.

5. A flush-frame car door assembly according to claim 1, characterized in that, The assembly groove (5) has a V-shaped structure, and multiple reinforcing ribs are regularly arranged inside the assembly groove (5). The reinforcing ribs have an L-shaped structure, and the automotive sheet metal is inserted above the reinforcing ribs.

6. A flush-frame door assembly according to claim 1, characterized in that, The bottom surface of the second mounting base (9) is in contact with the automotive sheet metal, and the top surface of the second mounting base (9) is in contact with the decorative panel (2).

7. A flush-frame car door assembly according to claim 1, characterized in that, The base plate (7) is provided with multiple downward recessed mounting grooves, and a second fastener (17) is provided at the mounting groove. The base plate (7) is fixed to the automotive sheet metal by the second fastener (17).

8. A flush-frame door assembly according to claim 1, characterized in that, The top surface of the base plate (7) is regularly arranged with multiple reinforcing plates. The reinforcing plates are arranged along the width direction of the base plate (7) and perpendicular to the top surface of the base plate (7). The multiple reinforcing plates are arranged parallel to each other. The sealing strip (4) is in contact with the reinforcing plates.

9. A flush-frame door assembly according to claim 1, characterized in that, The top surface of the side panel (8) is folded outward to form a flange (19), and the second mounting base (9) is set below the flange (19). There is a gap between the flange (19) and the decorative panel (2).

10. A flush-frame door assembly according to claim 1, characterized in that, The sealing strip (4) includes a U-shaped strip (20) and a base strip (21). The inner side of the U-shaped strip (20) is covered with a wear-resistant layer. The U-shaped strip (20) contacts the glass slider (22) through the wear-resistant layer. One end of the base strip (21) is connected to the U-shaped strip (20), and the other end of the base strip (21) has a horizontal Y-shaped structure.

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