Top side rail outer trim panel assembly, method of installation, and vehicle

Abstract

This invention discloses a top edge beam exterior trim assembly, comprising a top edge beam exterior trim body and at least one connected inner panel, the inner panel having a first snap-fit ​​portion. This assembly is detachably connected to a second snap-fit ​​portion on the vehicle's top edge beam mounting bracket via the first snap-fit ​​portion, allowing the lower edge of the exterior trim body to only abut against the upper edge of the corner window glass assembly, with no structural connection between the two. This invention transfers the fixing function of the exterior trim to an independent snap-fit ​​structure between the inner panel and the vehicle body bracket, eliminating reliance on corner window glass positioning or support, and enabling independent disassembly and assembly of the top edge beam exterior trim assembly without the need to remove the corner window glass. This significantly simplifies after-sales maintenance and replacement processes, shortens operation time, avoids damage to the fragile corner window glass during disassembly and assembly, and significantly improves the maintainability, interchangeability, and assembly efficiency of exterior components. This invention also discloses a vehicle and an installation method for the top edge beam exterior trim assembly.

Description

Technical Field

[0001] This invention belongs to the field of automotive technology. Specifically, this invention relates to a top edge beam exterior trim assembly, an installation method, and a vehicle. Background Technology

[0002] With the rapid development of society and the steady progress of science and technology, automobiles have become a means of transportation for more and more families. The roof beams of existing traditional and electric vehicles are mostly sheet metal parts, and the roof beams are mostly part of the body frame. Their installation is generally carried out by stamping and welding. Among them, the exterior trim parts of automobiles have become one of the essential elements of automobile appearance decoration.

[0003] In existing technologies, the traditional roof edge beam is integrated with the side panel, and is welded together from the inner and outer side panels and the inner roof edge beam exterior trim reinforcement plate, etc. When the appearance is damaged or broken and needs to be disassembled for repair, the rear corner window glass (hereinafter referred to as corner window glass), as well as a series of parts such as the side panel and the door, need to be disassembled first before repair. It also requires cutting, secondary welding, etc., which is relatively complicated and results in poor interchangeability. At the same time, the development cost of stamping, welding and painting of sheet metal roof edge beams is high, and the traditional sheet metal roof edge beam exterior trim plate is also heavy.

[0004] Given the technical problems existing in the aforementioned automotive top edge beams, there are currently no relevant solutions, therefore there is an urgent need to find effective solutions to address these issues. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a top edge beam exterior panel assembly, the purpose of which is to enhance the interchangeability of the top edge beam exterior panel and enable the top edge beam exterior panel to be removed without removing the corner window glass.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a top edge beam outer trim panel assembly, including a top edge beam outer trim panel body and at least one top edge beam outer trim panel inner panel connected to the top edge beam outer trim panel body, wherein a first snap-fit ​​portion is provided on the top edge beam outer trim panel inner panel. The top edge beam exterior trim assembly is detachably connected to the second snap-fit ​​portion of the top edge beam mounting bracket fixed on the vehicle body via the first snap-fit ​​portion, so that the lower edge of the top edge beam exterior trim body can abut against the top edge of the corner window glass assembly on the vehicle body, and the top edge beam exterior trim assembly can be disassembled and installed independently of the corner window glass assembly.

[0007] The first snap-fit ​​part is a hook provided on the inner panel of the outer trim panel of the top edge beam, and the second snap-fit ​​part is a slot provided on the mounting bracket of the top edge beam. The hook and the slot are snap-fitted together along the length of the outer trim panel assembly of the top edge beam.

[0008] The end of the inner panel of the outer trim panel of the top edge beam is provided with a top edge beam snap-fit ​​bracket, and the top edge beam snap-fit ​​bracket is provided with the first snap-fit ​​part; the number and position of the top edge beam mounting brackets correspond to the top edge beam snap-fit ​​brackets.

[0009] The top edge beam exterior trim assembly further includes at least one top edge beam exterior trim reinforcement plate disposed along the edge of the top edge beam exterior trim plate body. The top edge beam exterior trim reinforcement plate is provided with mounting holes for connection with the vehicle roof or a welding bracket on the vehicle roof via fasteners.

[0010] The top edge beam exterior trim assembly also includes a first sealing strip disposed at the matching gap between the top edge beam exterior trim body and the vehicle roof, and a second sealing strip disposed at the matching gap between the top edge beam exterior trim body and the vehicle B-pillar.

[0011] The inner panel of the outer trim panel of the top edge beam or the snap-fit ​​bracket of the top edge beam is also provided with a positioning pin, and the mounting bracket of the top edge beam is provided with a corresponding positioning hole. The positioning pin and the positioning hole are used for the installation and positioning of the assembly.

[0012] The top edge beam exterior trim panel body has a waist-shaped hole at its end for connecting to the vehicle side panel via stepped bolts, thereby limiting the fit clearance between the assembly and the rear pillar exterior trim panel and the corner window glass.

[0013] Some of the mounting holes on the top edge beam outer trim panel reinforcement plate are configured to be connected to the vehicle roof or welded bracket via stepped bolts. The flange face of the stepped bolt contacts the mounting surface of the top edge beam outer trim panel reinforcement plate but does not press it tightly. The mounting holes mate with the stepped portion of the stepped bolt to limit Y-axis sway and allow movement in the X-axis.

[0014] The present invention also provides a vehicle including the aforementioned top edge beam exterior trim assembly.

[0015] The present invention also provides a method for installing the top edge beam exterior panel assembly, comprising the following steps: Secure the top edge beam mounting bracket to the vehicle body; The top edge beam exterior trim panel assembly is engaged with the second snap-fit ​​part on the top edge beam mounting bracket by the first snap-fit ​​part on the inner panel of the top edge beam exterior trim panel, thereby achieving the pre-positioning and connection of the assembly on the vehicle body. The top edge beam exterior panel assembly is finally secured to the vehicle body using fasteners.

[0016] This invention provides a top edge beam exterior panel assembly. By providing a first snap-fit ​​portion on the inner panel, which directly snaps into and fixes the panel to a second snap-fit ​​portion pre-installed on a mounting bracket, the matching relationship between the exterior panel and the corner window glass is simplified to a simple edge abutment. The fixing function is transferred to an independent connecting pair formed by the inner panel snap-fit ​​portion and the vehicle body mounting bracket, enabling independent disassembly and installation of the top edge beam exterior panel assembly without removing the corner window glass. This not only greatly simplifies after-sales maintenance and replacement procedures and shortens operation time, but also avoids the risk of damage to the fragile corner window glass during disassembly. It fundamentally improves the repairability and interchangeability of the top edge beam exterior panel as an exterior component, allowing for disassembly of the top edge beam exterior panel without removing the corner window glass. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation position of the top edge beam exterior panel assembly in this invention; Figure 2 This is a schematic diagram of the internal structure of the top edge beam exterior panel assembly in this invention; Figure 3 This is an exploded view of the top edge beam exterior panel assembly in this invention; Figure 4 In this invention Figure 1 Schematic diagram of the cross-sectional structure of the middle AA section; Figure 5 In this invention Figure 1 Schematic diagram of the cross-sectional structure of the middle BB section; Figure 6 In this invention Figure 1 Schematic diagram of the cross-sectional structure of the middle CC section; Figure 7 In this invention Figure 1 Schematic diagram of the cross-sectional structure of the middle DD; Figure 8 This is a schematic diagram of the third top edge beam snap-fit ​​bracket for the outer trim panel of the top edge beam in this invention; Figure 9 This is a schematic diagram of the stepped bolts used in this invention; Figure 10 This is a schematic diagram of the 1 / 2 overlap of the top edge beam outer trim panel and the top edge beam outer trim panel reinforcement plate in this invention; Figure 11 This is a schematic diagram of the Z-shaped welding bracket in this invention; Figure 12 This is a schematic diagram of the matching between the top edge beam and the rear column exterior panel in this invention; Figure 13 This is a partial structural diagram of the inner panel of the exterior trim; Figure 14 This is a structural diagram of the connection between two adjacent exterior trim panels and reinforcement plates; In the diagram: the spacing or dimensions between parts have been exaggerated to show their positions; the diagram is for illustrative purposes only. The markings in the above figures are as follows: 1. Top edge beam exterior trim assembly; 2. A-pillar exterior trim assembly; 3. Rear pillar exterior trim assembly; 4. C-pillar exterior trim assembly; 5. Corner window glass assembly; 6. Luggage rack assembly; 7. Body frame side beam; 8. Body roof; 9. Body side panel; 10. Top edge beam mounting bracket; 11. Top edge beam exterior trim body; 111. Top edge beam first mounting hole; 112. Top edge beam second mounting hole; 12. First exterior trim inner panel; 121. Top edge beam exterior trim first snap-fit ​​bracket; 122. Top edge beam exterior trim second snap-fit ​​bracket; 13. Second exterior trim inner panel; 131. Top edge beam exterior trim third snap-fit ​​bracket; 14. Second sealing strip; 15. Second... 16. Sealing strip; 16. First exterior trim reinforcement plate; 161. First mounting hole at the top of the top edge beam; 162. Second mounting hole at the top of the top edge beam; 17. Second exterior trim reinforcement plate; 171. Third mounting hole at the top of the top edge beam; 172. Fourth mounting hole at the top of the top edge beam; 18. Third exterior trim reinforcement plate; 181. Fifth mounting hole at the top of the top edge beam; 19. Sponge block; 61. Luggage rack end cover body; 62. Luggage rack base; 63. Luggage rack soft rubber strip; 64. Luggage rack body; 81. Welding bracket (nut to be welded); A. Step bolt; B. Body frame B-pillar outer panel; C. Body frame A-pillar outer panel; D. Z-type welding bracket; 20. Flange face; 21. First snap-fit ​​part. Detailed Implementation

[0018] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. For a clearer understanding of the technical features, objectives, and effects of this invention, In the description of this invention, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "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 and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first," "second," and "third" may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] Firstly, such as Figures 1 to 13As shown, this embodiment of the invention provides a top edge beam exterior trim assembly 1, including a top edge beam exterior trim body 11 and at least one top edge beam exterior trim inner panel connected to the top edge beam exterior trim body 11. A first snap-fit ​​portion 21 is provided on the top edge beam exterior trim inner panel. The top edge beam exterior trim assembly 1 is detachably connected to a second snap-fit ​​portion of a top edge beam mounting bracket 10 fixed on the vehicle body through the first snap-fit ​​portion 21, so that the lower edge of the top edge beam exterior trim body 11 can abut against the top edge of the corner window glass assembly 5 on the vehicle body, and the top edge beam exterior trim assembly 1 can be disassembled and assembled independently of the corner window glass assembly 5.

[0020] Specifically, in this embodiment of the invention, addressing the shortcomings of existing technologies, the present invention provides an integrated automotive top edge beam exterior panel assembly 1 and its installation method. This eliminates the need for traditional welding methods for the top edge beam exterior panel and replaces the traditional adhesive-press method with a snap-fit ​​method for matching it to the corner window glass. Removing the top edge beam exterior panel does not require disassembling the corner window glass; it also changes the approach from sheet metal repair to direct repair or replacement of the plastic top edge beam exterior panel, enhancing its interchangeability.

[0021] By setting a first snap-fit ​​part 21 on the inner panel and directly snapping it with a second snap-fit ​​part pre-installed on the mounting bracket, the matching relationship between the outer trim panel and the corner window glass is simplified to a simple edge abutment. The fixing function is transferred to an independent connecting pair formed by the inner panel snap-fit ​​part and the vehicle body mounting bracket, realizing the independent disassembly and installation of the top edge beam outer trim panel assembly 1 without removing the corner window glass. This not only greatly simplifies the after-sales maintenance and replacement process and shortens the operation time, but also avoids the risk of damage to the fragile corner window glass during disassembly. It fundamentally improves the repairability and interchangeability of the top edge beam outer trim panel as an exterior component, enabling the top edge beam outer trim panel to be disassembled without removing the corner window glass. At the same time, the one-piece top edge beam also reduces the matching visual difference problem of the segmented top edge beam outer trim panels of traditional electric vehicles, with fewer gaps in the appearance, and a closer resemblance to the appearance effect of traditional sheet metal one-piece stamping.

[0022] like Figure 1As shown, the A-pillar exterior trim assembly 2, B-pillar exterior trim assembly, C-pillar exterior trim assembly 4, corner window glass assembly 5, and rear pillar exterior trim assembly 3 are located below the top edge beam exterior trim assembly 1, along the length direction (X direction) of the vehicle body. The corner window glass assembly 5 is located between the C-pillar exterior trim assembly 4 and the rear pillar exterior trim assembly 3. The A-pillar exterior trim assembly 2, B-pillar exterior trim assembly, C-pillar exterior trim assembly 4, corner window glass assembly 5, and rear pillar exterior trim assembly 3 are arranged sequentially along the length direction of the vehicle body. The top edge beam outer panel and the rear corner window glass obstruction area have no mounting structure on the vehicle body and abut against the corner window glass. The inner adhesive panel of the top edge beam is equipped with a positioning pin, which, in conjunction with the positioning holes on the mounting bracket, can effectively control the installation accuracy of the top edge beam relative to the vehicle body frame. One end of the top edge beam exterior panel assembly 1 is connected to the A-pillar exterior panel assembly 2 and the upper edge of the windshield, and the other end extends through the front and rear doors and corner windows of the car to the tailgate of the car, where it is connected to the rear pillar exterior panel assembly 3.

[0023] Preferably, the installation position of the top edge beam exterior panel assembly 1 is as follows: Figure 1 The lower part of the top edge beam exterior trim panel 11 is used to abut against the upper part of the corner window glass. When the top edge beam exterior trim panel is removed, there is no need to remove the side panel, door and other parts.

[0024] Preferably, the top side beam mounting bracket 10 has main and auxiliary self-positioning mounting holes at both ends, and the fastening bolts can be used as positioning pins for the top side beam mounting bracket 10 to be installed with the vehicle body frame beam. The top side beam mounting bracket 10 has a positioning hole for the top side beam exterior trim assembly 1 in the middle.

[0025] Preferably, the rear side of the top edge beam exterior panel assembly 1 has a waist hole in the Y direction and a square hole in the X direction to engage with the gantry clip of the rear pillar exterior panel assembly 3. This restricts the Z-direction position of the top edge beam exterior panel assembly 1 relative to the vehicle body frame, while ensuring the surface difference between it and the corner window glass and the rear pillar exterior panel. The front end has mounting holes and clips to engage with the A-pillar's handle structure, preventing the end from lifting up. The middle section has a square clip to engage with the C-pillar exterior panel's handle structure, controlling the matching surface difference.

[0026] In embodiments of the present invention, such as Figure 3 and Figure 13 As shown, the first snap-fit ​​part 21 is a snap hook provided on the inner panel of the outer trim panel of the top edge beam, and the second snap-fit ​​part is a snap groove provided on the mounting bracket 10 of the top edge beam. The snap hook and the snap groove are snap-fitted together along the length direction of the outer trim panel assembly 1 of the top edge beam.

[0027] Furthermore, a top edge beam snap-fit ​​bracket is provided at the end of the inner panel of the outer trim panel of the top edge beam. The top edge beam snap-fit ​​bracket is provided with a first snap-fit ​​part 21. Multiple first snap-fit ​​parts 21 are provided and distributed at opposite ends in the width direction of the top edge beam snap-fit ​​bracket. The number and position of the top edge beam mounting brackets 10 correspond to the top edge beam snap-fit ​​brackets.

[0028] In a preferred embodiment of the present invention, such as Figure 3 As shown, two inner panels are provided for the top edge beam exterior trim panel: a first inner panel 12 and a second inner panel 13. The first inner panel 12 and the second inner panel 13 are arranged sequentially along the length direction (i.e., the vehicle's front-to-back direction, also known as the X-direction) of the top edge beam exterior trim panel body 11. The second inner panel 13 is located directly above the corner window glass assembly 5. Two top edge beam snap-fit ​​brackets are provided on the first inner panel 12: a first snap-fit ​​bracket 121 and a second snap-fit ​​bracket 122. The first snap-fit ​​bracket 121 and the second snap-fit ​​bracket 122 are located at opposite ends of the first inner panel 12 along its length direction (X-direction). A top edge beam snap-fit ​​bracket is provided on the inner panel 13 of the second exterior trim panel. This top edge beam snap-fit ​​bracket is the third snap-fit ​​bracket 131 of the top edge beam exterior trim panel. The main structures of the first snap-fit ​​bracket 121, the second snap-fit ​​bracket 122, and the third snap-fit ​​bracket 131 of the top edge beam exterior trim panel are basically the same, and together they constitute the main snap-fit ​​points for connection with the vehicle body mounting bracket.

[0029] Each top edge beam snap-fit ​​bracket is preferably provided with multiple snap hooks, which are distributed at opposite ends in the width direction of the top edge beam snap-fit ​​bracket. For example, three snap hooks are provided at opposite ends in the width direction of the top edge beam snap-fit ​​bracket, and at each end, three snap hooks are arranged along the length direction of the top edge beam snap-fit ​​bracket.

[0030] During assembly, multiple hooks on each top edge beam mounting bracket engage with the corresponding slots along the Y-axis. When the hooks mate with their corresponding slots, effective rigid constraints are formed in the Y-axis and vertical (Z-axis) directions, ensuring the top edge beam exterior panel assembly 1 remains stable in these directions after assembly, without any risk of loosening. Crucially, the engagement between the hooks and slots along the length (X-axis) of the top edge beam exterior panel body 11 is designed with a preset gap. This gap is precisely calculated, allowing the hooks to undergo a slight relative sliding displacement within the slots along the X-axis. The inner panel of the top edge beam exterior panel is injection molded from a polymer material, while the top edge beam mounting bracket 10 is made of metal; the two have significantly different coefficients of thermal expansion. When the ambient temperature changes, the hooks will expand and contract along their length. At this time, the gap-fit ​​design between the hooks and slots in the X-axis comes into play. The hooks of the inner panel of the top edge beam exterior panel can generate a slight relative displacement with respect to the slots along the X-axis. This sliding process directly absorbs and releases the internal stress (i.e., thermal stress) accumulated at the connection point due to the inconsistent thermal expansion / contraction of different materials. This effectively avoids the stress concentration acting on the fixed point, which may lead to problems such as overload of the connection structure, plastic deformation, abnormal noise, or affecting the appearance matching accuracy. It improves the dimensional adaptability and reliability of the assembly in a wide temperature range environment.

[0031] To further enhance the overall rigidity and deformation resistance of the assembly, specific reinforcing structures are provided on the inner panels 12 and 13 of the first and second outer trim panels, excluding the area where the top edge beam clips are attached. These reinforcing structures preferably consist of numerous intersecting reinforcing ribs, forming a honeycomb-like grooved shape with a dense grid. When the inner panels are bonded to the outer trim panel body 11 of the top edge beam using adhesives or other methods, this honeycomb-like reinforcing structure significantly increases the surface area and structural moment of inertia of the inner panels. Without adding excessive weight, it greatly enhances the local rigidity and overall bending and torsional resistance of this area, ensuring the shape stability of large injection-molded parts under complex stress conditions.

[0032] Preferably, the lower flange of the top edge beam exterior panel body 11 is constructed to a shorter dimension. Simultaneously, the mounting points (e.g., auxiliary positioning holes and corresponding fasteners) for securing the rear of the top edge beam exterior panel assembly 1 are located outside the edge region of the corner window glass assembly 5. Correspondingly, the constraint positions of the third snap-fit ​​bracket of the top edge beam and its cooperating top edge beam mounting bracket 10 are also located outside the upper edge contour of the corner window glass assembly 5 and are fixedly connected to the body frame side beam 7. Importantly, the constraint positions of the third snap-fit ​​bracket of the top edge beam and the top edge beam mounting bracket 10 are outside the upper edge of the corner window glass assembly 5 and are fixedly installed to the body frame side beam 7; the distance between them is greater than the width of the upper edge of the corner window glass assembly 5.

[0033] Furthermore, the rear pillar exterior panel assembly 3 is fixed in the X-direction using a combination of T-shaped nails and C-shaped grooves on its rear side adjacent to the rear edge of the corner window glass assembly 5. After installing the top edge beam exterior panel assembly 1 and the corner window glass, the bolts at the auxiliary positioning holes and the hooks on the third snap-fit ​​bracket of the top edge beam engaging with the slots on the top edge beam mounting bracket 10 will not affect the corner window glass assembly 5 during installation and removal. Therefore, when removing the top edge beam exterior panel assembly 1, it is not necessary to remove the corner window glass assembly 5, making disassembly and replacement convenient.

[0034] like Figures 2 to 7 As shown, the top edge beam exterior trim assembly 1 of this embodiment of the invention further includes at least one top edge beam exterior trim reinforcement plate disposed along the edge of the top edge beam exterior trim body 11. Adjacent top edge beam exterior trim reinforcement plates are interlocked, and all top edge beam exterior trim reinforcement plates are arranged sequentially along the length direction of the top edge beam exterior trim body 11. The top edge beam exterior trim reinforcement plates and the top edge beam exterior trim inner plate are arranged sequentially along the width direction of the top edge beam exterior trim body 11. The top edge beam exterior trim reinforcement plates are provided with mounting holes for connection to the vehicle roof 8 or a welding bracket 81 on the vehicle roof 8 via fasteners.

[0035] In this embodiment of the invention, a positioning pin is provided on the inner panel of the outer trim panel of the top edge beam or on the snap-fit ​​bracket of the top edge beam, and a positioning hole is provided on the mounting bracket 10 of the top edge beam accordingly. The positioning pin and the positioning hole cooperate for the installation and positioning of the assembly.

[0036] In a preferred embodiment of the present invention, to ensure the installation accuracy and repeatability of the top edge beam exterior panel assembly 1 on the vehicle body frame, and to achieve a stable and consistent gap surface difference with surrounding components, positioning pins are provided on the first, second, and third top edge beam snap-fit ​​brackets. Correspondingly, corresponding positioning holes are provided on the three mating top edge beam mounting brackets 10. During assembly, the positioning pins are first inserted into the positioning holes to achieve precise pre-positioning of the top edge beam exterior panel assembly 1 relative to the vehicle body frame in its initial position, laying the foundation for subsequent snap-fit ​​operations. The hooks on each snap-fit ​​bracket and their corresponding slots on the top edge beam mounting bracket 10 are matched one-to-one in both quantity and spatial position. This design ensures that after the positioning pins complete the guidance, the hooks on the inner panel can smoothly and accurately engage with the corresponding slots on the top edge beam mounting bracket 10, thereby completing the final snap-fit ​​fixation of the assembly on the vehicle body frame side beam 7.

[0037] It is particularly important to note that the functions of the three positioning pairs (i.e., the combination of positioning pins and positioning holes) are designed to be differentiated to optimize tolerance allocation and accommodate the thermal expansion and contraction characteristics of the materials. Here, the fit between the first top edge beam snap-fit ​​bracket and its corresponding top edge beam mounting bracket 10 is selected as the primary positioning point. This primary positioning point provides a tight fit in both the length direction (X-direction) and width direction (Z-direction, i.e., the vertical direction) of the top edge beam outer trim panel, strictly limiting the assembly's four degrees of freedom (front-to-back and vertical) in these two directions, thus establishing the assembly's reference mounting position. In contrast, the second and third top edge beam snap-fit ​​brackets serve as auxiliary positioning points. These two positioning points primarily provide constraints in their width direction (Z-direction) to maintain the assembly's posture stability and mounting flatness in this direction; while in the length direction (X-direction), their fit is designed with appropriate tolerances or clearances. This positioning method, while ensuring the overall assembly accuracy, allows the assembly to expand or contract along its length due to temperature changes. It can generate a small amount of adaptive displacement at the auxiliary positioning point, thereby effectively absorbing thermal stress and preventing internal stress, deformation, or abnormal noise caused by completely rigid constraints. At the same time, it reduces the adverse effects of the cumulative tolerance of the dimensional chain between multiple positioning points on the assembly.

[0038] In a preferred embodiment of the present invention, such as Figure 3 As shown, three outer trim reinforcement plates are provided on the top edge beam: the first outer trim reinforcement plate 16, the second outer trim reinforcement plate 17, and the third outer trim reinforcement plate 18. Some of the mounting holes on the top edge beam outer trim reinforcement plates are configured to connect to the vehicle roof 8 or the welded bracket 81 via stepped bolts A. The flange face 20 of the stepped bolt A contacts but does not press against the mounting surface of the top edge beam outer trim reinforcement plate. The mounting holes mate with the stepped portion of the stepped bolt A to limit Y-axis sway and allow X-axis movement.

[0039] To accommodate the dimensional deformation of the top edge beam exterior panel assembly 1 under temperature changes and ensure its reliable connection with the vehicle roof 8, this invention employs differentiated fastening methods in the top connection structure. Along the top upper edge of the top edge beam exterior panel assembly 1, five mounting holes are provided on the first exterior panel reinforcement plate 16, the second exterior panel reinforcement plate 17, and the third exterior panel reinforcement plate 18: a first mounting hole 161, a second mounting hole 162, a third mounting hole 171, a fourth mounting hole 172, and a fifth mounting hole 181. These mounting holes are generally evenly distributed and are used for connection to the vehicle roof 8 or the welded bracket 81 on the vehicle roof 8 via fasteners. The top mounting holes 161, 162, 171, 172, and 181 of the top edge beam are arranged sequentially along the X direction. The top mounting holes 161 and 162 are located on the first outer trim panel reinforcement plate 16, the top mounting holes 171 and 172 are located on the second outer trim panel reinforcement plate 17, and the top mounting hole 181 is located on the third outer trim panel reinforcement plate 18.

[0040] To release the thermal expansion and contraction stress along the length (X direction) of the assembly caused by changes in ambient temperature, the above-mentioned mounting holes employ two different types of fastening methods: The first mounting hole 111 and the first mounting hole 161 at the top of the top edge beam on the outer panel body 11 of the top edge beam are fastened with ordinary first bolts. These connection points provide rigid constraints and mainly serve the functions of positioning and foundation fixing.

[0041] The second mounting hole 162, third mounting hole 171, fourth mounting hole 172, and fifth mounting hole 181 on the top of the top edge beam are fastened with a second bolt. This second bolt is a stepped bolt AA. The stepped bolt AA has a flange face 20, the diameter of which is larger than the nominal diameter of the external thread portion on its bolt. The flange face 20 connects to the end of the bolt. In the assembled state, the flange face 20 contacts the corresponding mounting surface on the top edge beam reinforcing plate, but is not subjected to clamping force; that is, the bolt tightening torque does not cause the flange face 20 to press against the mounting area. Simultaneously, the inner diameter of the mounting hole matches the diameter of the stepped portion on the bolt AA, thus limiting the sway of the assembly in the left-right direction (Y direction) of the vehicle; while in the critical length direction (X direction), relative free movement between the mounting hole and the bolt is allowed.

[0042] This combined fastening method creates a constraint system that ensures the basic positioning and installation strength of the assembly through rigid fixing at some points (the first bolt); and through flexible connections at other points (stepped bolts AA), it restricts unnecessary Y-axis displacement while intentionally releasing constraints in the X-axis, which is susceptible to thermal stress. This allows the top edge beam exterior panel assembly 1 to freely expand and contract along its length when the temperature changes, effectively absorbing internal thermal stress and avoiding deformation, abnormal noise, or overload of connectors caused by a completely rigid connection, significantly improving the assembly's environmental adaptability and long-term reliability.

[0043] In embodiments of the present invention, such as Figures 2 to 4 As shown, one end of the top edge beam exterior panel body 11 (near the front of the vehicle) is provided with a first mounting hole 111 for the top edge beam, and the other end of the top edge beam exterior panel body 11 (near the rear of the vehicle) is provided with a first oblong hole for auxiliary positioning. This first oblong hole is used to accommodate a stepped bolt A to partially connect the top edge beam exterior panel assembly 1 to the inner side panel 9 of the vehicle body. The length of the first oblong hole is greater than the nominal diameter of the external thread portion on the bolt A. The length direction of the first oblong hole is parallel to the X-direction. This oblong hole design provides an adjustment margin for the installation position in the vehicle's front-rear direction (X-direction). Through this connection point, the position of the top edge beam exterior panel assembly 1 in the X-direction can be slightly adjusted before final tightening, thereby precisely controlling the fit clearance between it and the rear pillar exterior panel assembly 3 and the corner window glass assembly 5, ensuring uniformity of appearance matching. The side panel 9 on the vehicle body is located inside the rear pillar exterior panel and the corner window glass assembly 5. Meanwhile, a second oblong hole is provided on the third exterior trim reinforcement plate 18 located at the rear end of the top edge beam exterior trim assembly 1. This second oblong hole is also adapted for connection with stepped bolts A. The length of the second oblong hole is greater than the nominal diameter of the external thread portion on the bolt A, and the length direction of the second oblong hole is parallel to the X-direction. During assembly, the operator can first adjust the relative gap between the rear end of the top edge beam exterior trim assembly 1 and the rear spoiler of the vehicle body to the design value, and then use the stepped bolts A to pass through the second oblong hole for tightening, thereby locking the adjusted gap state. This design enables direct and convenient control of key appearance gaps during assembly.

[0044] In addition, the third exterior trim reinforcement plate 18 is equipped with a dedicated snap-fit ​​hole, which is used to cooperate with the snap-fit ​​structure on the spoiler for installation. This independent snap-fit ​​mounting point can provide a clear positioning reference for the spoiler in the Z direction (up and down direction), thereby effectively ensuring a stable surface difference between the spoiler and the rear end of the top side beam exterior trim assembly 1, and improving the overall look and refinement of the rear styling.

[0045] To address the risk of deformation and warping of the front end of the top edge beam exterior panel assembly 1 due to material creep, temperature changes, or vibration during long-term use, this invention incorporates a dual anti-warping constraint structure in its front end region. Specifically, a first mounting hole 111 for the top edge beam is provided in the area at the front end of the top edge beam exterior panel assembly 1, which is obscured by the upper part of the A-pillar exterior panel assembly 2. This mounting hole aligns with the corresponding hole on the A-pillar exterior panel C of the vehicle frame and is secured with a standard bolt. This direct bolt connection provides strong rigid constraint in the vertical direction (Z-direction), firmly anchoring the front end of the top edge beam exterior panel assembly 1 to the vehicle frame, thus providing a fundamental guarantee against warping. Simultaneously, as a supplement and reinforcement, at least one hook structure is integrated into the first exterior panel reinforcement plate 16 located at the front end. This hook is designed to adapt to and form a snap-fit ​​engagement with the Z-shaped bracket welded and fixed to the edge of the vehicle roof 8. Once the top edge beam exterior panel assembly 1 is installed in place, the interlocking action between this hook and the Z-shaped bracket creates an additional mechanical limit in the geometric structure that prevents the front end from moving upward (positive Z-direction). like Figure 14 As shown, to enhance the overall structural rigidity of the top edge beam exterior panel assembly 1, particularly to improve the local strength of multiple reinforcing plates in the junction area, this invention optimizes the connection relationship between adjacent reinforcing plates. Specifically, two top edge beam exterior panel reinforcing plates arranged adjacent to each other along the length of the top edge beam have mutually interlocking positioning structures at their close end regions. The specific form of this positioning structure is as follows: a positioning protrusion is formed at the end of one reinforcing plate; and a positioning groove adapted to the shape of the positioning protrusion is formed at the corresponding end of the other adjacent reinforcing plate. When each reinforcing plate is assembled with the top edge beam exterior panel body 11, the positioning protrusion is embedded in the corresponding positioning groove, achieving fitting and interlocking between the two.

[0046] In one embodiment of the present invention, such as Figure 2 and Figure 3 As shown, the second exterior trim reinforcement plate 17, located in the middle, has a positioning groove at each end along its length. Correspondingly, the rear end of the first exterior trim reinforcement plate 16 in front of it, and the front end of the third exterior trim reinforcement plate 18 behind it, each have a positioning protrusion. These positioning protrusions and positioning grooves are fitted into each other during assembly.

[0047] This cross-fitting positioning structure changes the simple juxtaposition of multiple independent reinforcing plates. Through the mechanical interlocking of positioning protrusions and positioning grooves, a continuous and stable transition connection is formed at the junction of adjacent reinforcing plates. This effectively compensates for the inherent structural discontinuity at the end of a single reinforcing plate and eliminates the problem of local stiffness reduction that may occur due to weakened support in that area. Therefore, when the top edge beam exterior panel assembly 1 is subjected to external forces in the area between adjacent reinforcing plates, this positioning structure can work together with each reinforcing plate to resist deformation, significantly improving the overall bending and torsional resistance and dimensional stability of the assembly, especially in weak connection areas, and ensuring the flatness of the appearance surface.

[0048] like Figures 2 to 6 As shown, the top edge beam exterior trim assembly 1 of this embodiment of the invention also includes a first sealing strip disposed at the matching gap between the top edge beam exterior trim body 11 and the vehicle roof 8, and a second sealing strip 1514 disposed at the matching gap between the top edge beam exterior trim body 11 and the vehicle B pillar.

[0049] A first sealing strip is provided along the length of the longitudinal matching gap between the top edge beam outer trim panel 11 and the roof 8. This sealing strip is located in the uncovered area of ​​the roof rack assembly 6, and its function is to effectively prevent rainwater or car wash water flowing down the roof from entering the cavity at the bottom of the top edge beam outer trim panel assembly 1. At the same time, a second sealing strip 1514 is provided at the matching overlap between the top edge beam outer trim panel 11 and the outer panel B of the B-pillar of the vehicle frame. This sealing strip serves two purposes: firstly, it covers the visual gap that may be caused by the accumulation of tolerances between the plastic trim panel and the metal sheet metal, improving the appearance quality; secondly, it forms a sealing barrier, working in conjunction with the water-guiding flange that flips up on the side of the roof 8 to guide any water that may intrude to the front and rear of the vehicle for discharge, preventing it from entering the passenger compartment.

[0050] An elastic buffer block, such as a sponge block 19, is embedded between the bottom of the outer trim panel reinforcement plate of the top edge beam and the corresponding mounting bracket or sheet metal on the roof 8. This buffer block fills the assembly gap between the trim panel and the body in the Z direction. Its function is to absorb and attenuate structural impacts that may be caused by road vibration or relative micro-displacement of components during vehicle operation, thereby effectively suppressing or eliminating abnormal noises caused by such contact.

[0051] The top edge beam exterior trim assembly 1 provided in this embodiment of the invention has significant technical advantages in material selection, manufacturing process, and structural integration, which together contribute to its excellent overall performance. In terms of materials, the top edge beam exterior trim body 11 is preferably made of engineering plastics such as PC+ABS, PC, or PMMA+ASA. These materials not only meet diverse appearance and texture requirements such as high-gloss injection molding, spraying, or leather-like textures, but also have a relatively low coefficient of thermal expansion compared to metals. This characteristic is crucial for larger top edge beam components, ensuring that the dimensional changes of the assembly are controlled within design tolerances when the vehicle experiences a wide temperature range, thereby guaranteeing the long-term stability of the matching gaps with surrounding components (such as corner window glass and roof).

[0052] In terms of manufacturing and connection processes, the outer trim panel body 11 of the top edge beam, the inner panel, and multiple reinforcing plates are all made of polymer composite materials and molded separately using injection molding. Each component is precisely positioned using robotic tooling and fixedly connected using adhesive bonding. This greatly simplifies mold complexity and production processes, effectively reducing development and manufacturing costs. The application of polymer materials significantly reduces component weight, contributing to the overall vehicle lightweighting goal. Injection molding makes it possible to manufacture unibody, long exterior parts, avoiding the seam problems inherent in traditional segmented designs.

[0053] Most importantly, the top edge beam exterior panel assembly 1 no longer relies on pressing and fixing to the corner window glass. Instead, it is installed on the vehicle body through its own independent snap-fit ​​and screw-fit system, and its relationship with the corner window glass is only abutting. This makes the assembly a truly independent and detachable module. It enables the independent and convenient installation and removal of the top edge beam exterior panel assembly 1 without disassembling the corner window glass and other complex peripheral components, greatly improving maintenance efficiency and parts interchangeability.

[0054] The top edge beam exterior panel assembly 1 provided by the present invention has the following advantages: 1. This invention uses an inner panel hook to engage and fix the top edge beam outer trim panel with the top edge beam mounting bracket 10 slot, thus changing the matching method between the top edge beam outer trim panel and the rear corner window glass from the traditional pressing method to a snap-fit ​​method. Disassembly does not require the removal of the corner window glass. The top edge beam outer trim panel can be removed without removing the corner window glass, changing from sheet metal repair to direct replacement of the top edge beam outer trim panel, enhancing the interchangeability of the top edge beam outer trim panel.

[0055] 2. The various sub-components of the top edge beam exterior panel assembly 1 of the present invention are made by injection molding of plastic particles, which makes them lighter than traditional sheet metal side panels, thus significantly reducing the overall vehicle weight and ensuring the vehicle's lightweight requirements. In addition, by using a combination of processes such as injection molding of plastic particles and adhesive bonding to replace traditional sheet metal stamping, painting, welding and other processes, the development cost is lower.

[0056] 3. The top edge beam exterior trim panel of the present invention is connected to the vehicle body frame by hooks and slots, which is convenient for installation. After the top edge beam exterior trim panel is installed, other parts can be installed, which solves the problem that the traditional top edge beam cannot be disassembled after welding.

[0057] 4. The outer trim panel of the top edge beam of the present invention is an integral piece, which solves the defects of traditional electric vehicle segmented top edge beams, such as many gaps and easy air and water leakage.

[0058] Secondly, embodiments of the present invention also provide a vehicle including a top edge beam exterior trim assembly 1 with the above-described structure. This top edge beam exterior trim assembly 1 can be referred to... Figures 1 to 14 The details will not be elaborated further here. Since the vehicle of the present invention includes the top edge beam exterior panel assembly 1 in the above embodiments, it has all the advantages of the top edge beam exterior panel assembly 1 described above.

[0059] Thirdly, embodiments of the present invention also provide an installation method for the top edge beam exterior panel assembly 1, comprising the following steps: Secure the top edge beam mounting bracket 10 to the vehicle body; The top edge beam exterior trim panel assembly 1 is engaged with the second snap-fit ​​part on the top edge beam mounting bracket 10 via the first snap-fit ​​part 21 on the inner panel of the top edge beam exterior trim panel, thereby achieving the pre-positioning and connection of the assembly on the vehicle body. Use fasteners to finally secure the top edge beam exterior panel assembly 1 to the vehicle body. Example

[0060] This embodiment also provides an installation method for the top edge beam exterior panel assembly 1, including the following steps: S1. Installation positioning base: At least three top side beam mounting brackets 10 are pre-installed and fixed in the preset positions of the body frame side beams 7 using fasteners, providing a base for the subsequent snap-fit ​​of the top side beam exterior trim assembly 1; S2. Assembly Positioning and Fixing: Lift the top edge beam exterior panel assembly 1 to the installation position, and perform initial alignment and pre-positioning by using the positioning pins of multiple top edge beam snap-fit ​​brackets on its inner panel and the positioning holes on the corresponding top edge beam mounting brackets 10. Subsequently, snap the hooks on each top edge beam snap-fit ​​bracket into the corresponding slots on the top edge beam mounting brackets 10 along the direction perpendicular to the length of the top edge beam (Y direction), completing the initial positioning of the assembly and the Y and Z direction constraints; After completing the pre-positioning of the clips, perform the final tightening in sequence: The assembly is connected to the side panel 9 via a stepped bolt A passing through the waist-shaped hole (second mounting hole 112 on the top side beam) at the rear of the assembly. This waist-shaped hole provides adjustment allowance in the vehicle's longitudinal direction (X direction) for fine-tuning the gap between the rear of the assembly and the rear pillar exterior trim panel and corner window glass. After adjustment, it is tightened. Using ordinary bolts, pass through the first mounting hole 111 of the top edge beam at the front end of the assembly and the first mounting hole 161 at the top of the top edge beam corresponding to the front reinforcement plate, and rigidly fasten it to the outer A-pillar panel and roof area of ​​the vehicle body to establish the main fixing points. The stepped bolt A is used to connect to the vehicle roof 8 or roof welding bracket 81 by passing through the remaining mounting holes (such as the second to fifth mounting holes) on the top reinforcing plate of the assembly. In this step, the flange face 20 of the stepped bolt A contacts the mounting surface of the reinforcing plate but is not pressed tightly, so that the assembly can undergo a slight displacement in the X direction due to thermal expansion and contraction, thereby releasing thermal stress; S3. Assemble the front peripheral components: Install the A-pillar exterior trim assembly 2 to the A-pillar area of ​​the vehicle body, and connect its upper edge to the pre-set slot at the front end of the top edge beam exterior trim assembly 1 through a snap-fit ​​structure (such as a snap hook); S4. Assemble the rear peripheral components: Install the rear pillar outer trim panel assembly 3 to the corresponding position on the vehicle body. Its top is inserted into the pre-set square clip hole at the rear end of the top side beam outer trim panel assembly 1 through the gantry clip structure to achieve Y-axis and Z-axis positioning. S5. Install side trim pieces: Install the C-pillar trim panel to the C-pillar area of ​​the vehicle body, and its top is also connected to the pre-set clip holes on the side of the top edge beam outer trim panel assembly 1 through a snap-fit ​​structure (such as a gantry clip); S6. Assemble the rear components: Install the spoiler, which is connected to the buckle hole on the rear end reinforcement plate of the top side beam outer trim panel assembly 1 by a buckle, and can also be fixed in the Z direction by bolts; S7. Assemble the top components: Install the roof rack assembly 6 onto the welded bracket 81 of the roof cover 8 using fasteners. The sealing strip at the bottom of the roof rack overlaps with the top edge of the roof edge beam exterior panel assembly 1 to form a waterproof seal; S8. Final assembly of corner window glass: Finally, the corner window glass assembly 5 is bonded and fixed to the side panel of the vehicle body along the Y direction using an adhesive (such as polyurethane glue). At this time, the top edge of the corner window glass only forms an abutment fit with the lower flange of the already installed top edge beam exterior trim assembly 1, and there is no mechanical connection or pressing fixation between the two.

[0061] This method changes the traditional assembly and maintenance logic, making the top edge beam exterior panel assembly 1 an independently detachable module. By first independently installing and fixing the top edge beam exterior panel assembly 1, then assembling the surrounding components, and finally installing the corner window glass assembly 5, the top edge beam exterior panel assembly 1 can be replaced without disassembling the corner window glass assembly 5.

[0062] The reverse disassembly method for the top edge beam exterior panel assembly 1 is as follows: When the top edge beam exterior panel assembly 1 needs repair or replacement, it is not necessary to disassemble the corner window glass assembly 5. Simply remove the luggage rack assembly 6, spoiler, C-pillar trim panel, rear pillar exterior panel assembly 3, and A-pillar exterior panel assembly 2 in the reverse order of the installation steps described above. Then loosen all relevant bolts (including ordinary bolts and step bolts A), and finally disengage the clips on the top edge beam exterior panel assembly 1 from the mounting bracket slots to remove the assembly as a whole.

[0063] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of the present invention without departing from the spirit and principles of the present invention and the content of the technical solution are all within the protection scope of this technical solution.

Claims

1. The top edge beam exterior trim panel assembly, characterized in that, It includes a top edge beam outer trim panel body and at least one top edge beam outer trim panel inner panel connected to the top edge beam outer trim panel body, wherein a first snap-fit ​​portion is provided on the top edge beam outer trim panel inner panel. The top edge beam exterior trim assembly is detachably connected to the second snap-fit ​​portion of the top edge beam mounting bracket fixed on the vehicle body via the first snap-fit ​​portion, so that the lower edge of the top edge beam exterior trim body can abut against the top edge of the corner window glass assembly on the vehicle body, and the top edge beam exterior trim assembly can be disassembled and installed independently of the corner window glass assembly.

2. The top edge beam exterior panel assembly according to claim 1, characterized in that, The first snap-fit ​​part is a hook provided on the inner panel of the outer trim panel of the top edge beam, and the second snap-fit ​​part is a slot provided on the mounting bracket of the top edge beam. The hook and the slot are snap-fitted together along the length of the outer trim panel assembly of the top edge beam.

3. The top edge beam exterior panel assembly according to claim 2, characterized in that, The end of the inner panel of the outer trim panel of the top edge beam is provided with a top edge beam snap-fit ​​bracket, and the top edge beam snap-fit ​​bracket is provided with the first snap-fit ​​part; the number and position of the top edge beam mounting brackets correspond to the top edge beam snap-fit ​​brackets.

4. The top edge beam exterior panel assembly according to any one of claims 1 to 3, characterized in that, It also includes at least one top edge beam outer trim panel reinforcement plate disposed along the edge of the top edge beam outer trim panel body, the top edge beam outer trim panel reinforcement plate being provided with mounting holes for connection to the vehicle roof or a welding bracket on the vehicle roof via fasteners.

5. The top edge beam exterior panel assembly according to any one of claims 1 to 3, characterized in that, It also includes a first sealing strip disposed at the matching gap between the outer trim panel body of the top edge beam and the roof of the vehicle, and a second sealing strip disposed at the matching gap between the outer trim panel body of the top edge beam and the B-pillar of the vehicle.

6. The top edge beam exterior panel assembly according to any one of claims 1 to 3, characterized in that, The inner panel of the outer trim panel of the top edge beam or the snap-fit ​​bracket of the top edge beam is also provided with a positioning pin, and the mounting bracket of the top edge beam is provided with a corresponding positioning hole. The positioning pin and the positioning hole are used for the installation and positioning of the assembly.

7. The top edge beam exterior panel assembly according to any one of claims 1 to 3, characterized in that, The top edge beam exterior trim panel body has a waist-shaped hole at its end for connecting to the vehicle side panel via stepped bolts, thereby limiting the fit clearance between the assembly and the rear pillar exterior trim panel and the corner window glass.

8. The top edge beam exterior panel assembly according to claim 4, characterized in that, Some of the mounting holes on the top edge beam outer trim panel reinforcement plate are configured to be connected to the vehicle roof or welded bracket via stepped bolts. The flange face of the stepped bolt contacts the mounting surface of the top edge beam outer trim panel reinforcement plate but does not press it tightly. The mounting holes mate with the stepped portion of the stepped bolt to limit Y-axis sway and allow movement in the X-axis.

9. A vehicle, characterized in that, Includes the top edge beam exterior panel assembly as described in any one of claims 1 to 8.

10. A method for installing a top edge beam exterior panel assembly, characterized in that, Includes the following steps: Secure the top edge beam mounting bracket to the vehicle body; The top edge beam exterior trim assembly as described in any one of claims 1-8 is engaged with the second snap-fit ​​portion on the top edge beam mounting bracket via a first snap-fit ​​portion on the inner panel of the top edge beam exterior trim assembly, thereby achieving the pre-positioning and connection of the assembly on the vehicle body. The top edge beam exterior panel assembly is finally secured to the vehicle body using fasteners.

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