Split type back door assembly and vehicle

Abstract

The invention provides a split type back door assembly and a vehicle, and belongs to the technical field of vehicle back door structures, the split type back door assembly comprises a back door assembly and a center joint sealing assembly, the center joint sealing assembly is rotationally connected with one back door, and when the back door is closed, the center joint sealing assembly shields a middle joint between the two back doors. After the back doors are closed, the back door sealing strips on the two back doors abut against the center joint sealing assembly and the vehicle body, due to the fact that the back doors and the center joint sealing assembly exert extrusion force on the back door sealing strips in the front-back direction, gaps between the back doors and the center joint sealing assembly can be effectively filled with the back door sealing strips, and the waterproof and dustproof performance is improved. A corner connecting structure does not need to be arranged, the diversity and complexity of the structure are reduced, die development and part production are facilitated, the positioning difficulty and the rework rate in the assembly process are reduced, and therefore the production and assembly cost is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of vehicle tailgate structures, and more specifically, relates to a double-door tailgate assembly and a vehicle. Background Art

[0002] Since the double-opening back door needs to deal with more variables such as double-door alignment accuracy, relative displacement, multi-directional force, etc., its sealing performance has inherent disadvantages. In particular, the middle joint seam of the double-opening back door is the design difficulty of the entire back door sealing structure.

[0003] The central sealing structure of existing double-opening back doors primarily consists of a primary sealing strip at the joint between the doors. This strip elastically deforms when the doors are closed, filling the gap. A secondary sealing strip is added inside the primary strip, or a flanged edge is designed around the door edge to create a redundant sealing path, further preventing water and dust infiltration. Furthermore, to connect the door sealing structure vertically, the central joint sealing strip is required to form corner joints at both ends, sealingly joining the door sealing structure to form a sealing system that runs throughout the entire joint.

[0004] However, because the corner structure must simultaneously connect the middle area of ​​the joint seal and the top and bottom areas of the door seal, achieving three different sealing paths, and adapting to the complex curved surfaces of the vehicle's rear end (such as the transition area with the roof and rear bumper), the corner structure is overly complex. This not only increases the cost of mold development and component production, but also increases the difficulty of positioning during assembly, making the sealing path easily interrupted due to assembly deviations. Furthermore, the complex corner structure directly exacerbates the risk of water leakage and reduces the waterproofing effect. Summary of the Invention The purpose of the present application is to provide a split-type tailgate assembly and a vehicle, aiming to solve the problem that the sealing of the existing middle joint seam mainly relies on the corner structure, but the corner structure is complex and affects the waterproof effect.

[0005] In a first aspect, an embodiment of the present application provides a split-type tailgate assembly, comprising: A back door assembly, comprising a back door rotatably connected to the vehicle body and a back door sealing strip provided on the back door, wherein two back doors are provided and are symmetrically arranged with respect to the longitudinal center plane of the vehicle, and when the back door is closed, the back door sealing strip abuts against the vehicle body; and The center seam sealing assembly is connected to one of the rear doors with the vertical direction as the rotating axis, and corresponds to the center seam of the two rear doors. When the rear doors are closed, the rear doors and the center seam sealing assembly respectively apply extrusion force to the rear door sealing strip in the front and rear directions.

[0006] The beneficial effect of the double-door tailgate assembly provided by the present application is that, compared with the prior art, the center seam sealing assembly is rotatably connected to one of the tailgates, so that when the tailgate is closed, the center seam sealing assembly can cover the center seam between the two tailgates. After the tailgate is closed, the tailgate sealing strips on the two tailgates abut against the center seam sealing assembly and the vehicle body. Since the tailgate and the center seam sealing assembly apply an extrusion force to the tailgate sealing strips in the front-to-back direction, the tailgate sealing strips can effectively fill the gap between the tailgate and the center seam sealing assembly, thereby improving the waterproof and dustproof performance. At the same time, the tailgate sealing strip corresponding to the vehicle body fills the gap between the tailgate and the vehicle body, thereby sealing the outer area of ​​the tailgate. The present application does not require the provision of an angle structure, which reduces the diversity and complexity of the structure. It not only facilitates mold development and parts production, but also reduces the positioning difficulty and rework rate during the assembly process, thereby reducing production and assembly costs. At the same time, a center seam sealing structure is added to seal with the rear door and rear door sealing strip to form an integral module, which not only retains the advantage of the easy opening of the double-door structure, but the shielded extrusion sealing structure also avoids the problem of poor sealing performance of the traditional double-door structure.

[0007] In conjunction with the first aspect, in a possible implementation, the center seam sealing assembly includes: A mounting seat is fixed to the vehicle body, wherein the mounting seat is provided with a guide groove, and the guide groove has an inlet connected to the outside; and The sealing baffle is connected to the front part of one of the tailgates with an up-down direction as a rotating shaft, and the sealing baffle has a guide portion that is slidably inserted in the guide groove. When the tailgate is closed, the tailgate sealing strip is squeezed and sealed to the sealing baffle along the front-to-back direction.

[0008] In the above technical solution, when the guide portion of the sealing baffle slides within the guide groove, the guide groove can precisely guide the movement trajectory of the sealing baffle, ensuring stable contact between the sealing baffle and the tailgate sealing strip during closing of the tailgate, avoiding sealing gaps caused by positional offset. Combined with the front-to-back compression of the tailgate sealing strip, the sealing reliability of the center joint is improved, effectively preventing the intrusion of water, dust, etc. Furthermore, the mounting base is fixed to the vehicle body, and the guide groove forms a solid constraint on the guide portion of the sealing baffle, reducing the shaking of the sealing baffle during driving or door opening and closing, and reducing the risk of sealing failure due to vibration. At the same time, the sealing baffle is rotatably connected to the tailgate, allowing it to move synchronously with the tailgate, avoiding rigid collisions between the structures and extending the service life of the components.

[0009] In combination with the first aspect, in a possible implementation, the back door sealing strip includes a bubble tube and a reinforcement plate arranged in the bubble tube, the bubble tube is connected to the back door, the reinforcement plate radially divides the inner cavity of the bubble tube into two independent chambers, and the reinforcement plate is used to provide support force to the bubble tube in the front and rear directions.

[0010] In the above technical solution, the reinforcement sheet provides stable support for the bubble tube in the fore-aft direction. When the tailgate sealing strip is squeezed and sealed against the sealing baffle in the fore-aft direction, the reinforcement sheet resists excessive deformation of the bubble tube, preventing collapse or loss of elasticity due to excessive squeezing force. This ensures that the bubble tube always maintains a tight fit with the sealing baffle, maintains stable sealing pressure, and reduces gaps caused by inadequate sealing surface fit. If slight displacement or pressure fluctuations occur between the sealing baffle and the tailgate sealing strip during vehicle driving or door closing, the two chambers absorb the impact through independent elastic deformation, adapting to the sealing requirements of different areas (e.g., the chamber on one side of the reinforcement sheet focuses on support, while the chamber on the other side focuses on cushioning). This enhances the seal's adaptability and ensures sealing continuity even with slight assembly deviations or vehicle body vibrations.

[0011] In combination with the first aspect, in a possible implementation, the reinforcement sheet has a reinforcement portion bent toward one of the chambers, and the reinforcement portion is used to improve the bending strength of the reinforcement sheet.

[0012] In the above technical solution, the bending reinforcement changes the cross-sectional shape of the reinforcement sheet, significantly enhancing its ability to resist bending deformation compared to a straight structure. When the back door sealing strip is subjected to extrusion pressure in the front-to-back direction, the reinforcement deforms in the direction of its fold. Since the reinforcement itself has bending marks, it reduces the problem of local stress concentration caused by long-term stress deformation, which in turn causes fracture. Even under long-term high-frequency extrusion or high pressure shock, this application can maintain effective support for the bubble tube, prevent the bubble tube from local collapse due to support failure, and ensure a tight fit of the sealing surface.

[0013] In combination with the first aspect, in a possible implementation, the back door sealing strip further includes fiber filaments passing through the bubble tube, and the fiber filaments extend along the axis of the bubble tube to improve the shrinkage resistance of the bubble tube.

[0014] In the above technical solution, the fiber filaments extend along the axis of the bulb, exerting axial tension and restraint on the bulb. During long-term use, the bulb is prone to axial shortening due to thermal expansion and contraction or material shrinkage. The fiber filaments, with their high tensile strength, effectively resist this shrinkage, minimizing dimensional changes along the length of the bulb. This prevents gaps between the bulb and the sealing surface caused by shrinkage, thus ensuring the integrity of the sealing path.

[0015] In combination with the first aspect, in a possible implementation, the bubble tube has waterproof ridges spaced apart along its circumference, and the waterproof ridges are used to achieve extrusion sealing with the center seam sealing assembly or the vehicle body.

[0016] In the above technical solution, when the tailgate is closed, the bubble tube follows the tailgate, and its circumferentially spaced waterproof ridges gradually come into contact with the center seam sealing assembly or the vehicle body. As the tailgate continues to close, the waterproof ridges are squeezed in the front-to-back direction, elastically deforming and tightly fitting the center seam sealing assembly or the vehicle body surface, forming multiple independent sealing barriers. When the tailgate is opened, the squeezing force on the waterproof ridges disappears, and the strips return to their original state. This embodiment achieves a multi-pass squeeze seal through circumferentially spaced waterproof ridges. Even if a waterproof ridge fails due to local wear or a small gap, the remaining waterproof ridges can still ensure sealing performance, significantly reducing the risk of water leakage and dust ingress. Furthermore, the elastic deformation of the waterproof ridges can adapt to different squeezing amounts. Even when the vehicle vibrates or there are slight deviations in assembly, deformation compensation can still ensure a tight fit, improving the reliability of the seal. Furthermore, the waterproof ridges can concentrate and disperse the squeezing force, reducing the overall stress burden on the bubble tube, delaying the aging and wear of the bubble tube, and extending the service life of the tailgate sealing strip.

[0017] In combination with the first aspect, in a possible implementation, the guide groove includes a locking area and a guide area that are connected to each other, the locking area extends in the left and right directions, one end of the guide area is connected to the locking area, and the other end is bent backward and connected to the outside, and the guide area is an arc-shaped groove body.

[0018] In the above technical solution, when the tailgate is closed, the guide portion of the sealing baffle enters from the external connection end of the guide area. The curved guide area guides the guide portion of the sealing baffle for smooth movement, reducing any jamming during movement and allowing the sealing baffle to rotate more smoothly during subsequent rotation of the tailgate. The guide portion then enters the locking area extending in the left-right direction. The locking area limits the guide portion in the left-right direction, preventing the sealing baffle from shifting left-right due to factors such as vehicle vibration after the tailgate is closed. This ensures that the sealing baffle is precisely aligned with the tailgate sealing strip and that the tailgate sealing strip is pressed against the sealing baffle in the front-to-back direction. Furthermore, the backward curvature of the guide area aligns with the rotation trajectory of the tailgate, allowing the guide portion to more closely follow the movement of the tailgate, reducing friction loss between the guide portion and the guide groove during movement and extending the service life of the components. The connection between the locking area and the guide area ensures a smooth transition from guiding to locking, further improving the consistency and stability of the center seam sealing assembly.

[0019] In a second aspect, an embodiment of the present application further provides a vehicle comprising a vehicle body and the above-mentioned double-door tailgate assembly.

[0020] The beneficial effect of the vehicle provided by the present application is that, compared with the prior art, it adopts the above-mentioned double-door tailgate assembly, which is rotatably connected to one of the tailgates via a center seam sealing assembly, so that when the tailgate is closed, the center seam sealing assembly can cover the center seam between the two tailgates. After the tailgate is closed, the tailgate sealing strips on the two tailgates abut against the center seam sealing assembly and the vehicle body. Since the tailgate and the center seam sealing assembly apply an extrusion force to the tailgate sealing strips in the front-to-back direction, the tailgate sealing strips can effectively fill the gap between the tailgate and the center seam sealing assembly, thereby improving the waterproof and dustproof performance. At the same time, the tailgate sealing strip corresponding to the vehicle body fills the gap between the tailgate and the vehicle body, thereby sealing the outer area of ​​the tailgate. The present application does not require the provision of a corner structure, which reduces the diversity and complexity of the structure. It not only facilitates mold development and parts production, but also reduces the positioning difficulty and rework rate during the assembly process, thereby reducing production and assembly costs. At the same time, a center seam sealing structure is added to seal with the rear door and rear door sealing strip to form an integral module, which not only retains the advantage of the easy opening of the double-door structure, but the shielded extrusion sealing structure also avoids the problem of poor sealing performance of the traditional double-door structure.

[0021] In combination with the second aspect, in a possible implementation, the vehicle body includes a side panel assembly and a roof arranged on the inner side of the side panel assembly, and the vehicle also includes a door frame sealing strip connected to the side panel assembly, and the door frame sealing strip is used to achieve sealing between the side panel assembly and the roof.

[0022] In the above technical solution, the door frame sealing strip tightly fills the gap between the side panel assembly and the roof, forming a reliable sealing barrier that prevents rainwater, dust, and other particles from entering the vehicle through the connection between the two, preventing leakage that could affect the interior environment or cause rust on body components. This sealing method also enhances the structural stability of the connection between the side panel assembly and the roof, reducing friction and noise caused by vibration during driving, and improving driving quietness. Furthermore, the door frame sealing strip does not require complex structural coordination, making it easy to install and low-maintenance. It maintains a good sealing effect over the long term, and synergizes with other sealing structures such as the center seam seal assembly to further enhance the vehicle's overall sealing reliability.

[0023] In combination with the first aspect, in a possible implementation, the door frame sealing strip includes a sealing body and a support frame inserted in the sealing body, the sealing body is provided with an installation groove, the side panel assembly is inserted in the installation groove, and the sealing body is also overlapped and sealed with the ceiling, and the support frame is arranged on the periphery of the installation groove.

[0024] In the above technical solution, the sealing body forms a plug-in fit with the side panel assembly through the mounting groove, which can quickly achieve precise positioning, ensure a firm and tight connection between the sealing body and the side panel assembly, and reduce the sealing gap caused by assembly deviation. At the same time, the overlapping seal between the sealing body and the ceiling can cover the transition area between the side panel assembly and the ceiling, forming a continuous sealing path to prevent rainwater and dust from seeping through the connecting gap between the two. The support frame outside the mounting groove can provide rigid support for the sealing body, enhance the structural strength of the mounting groove, prevent the sealing body from being deformed by the plug-in force of the side panel assembly or vehicle vibration, and ensure the long-term stability of the plug-in seal between the mounting groove and the side panel assembly. In addition, the support frame can also disperse the external force applied to the sealing body, reduce wear or deformation of the sealing body at the overlap with the ceiling, and extend the service life of the sealing strip. This embodiment enables the door frame sealing strip to achieve reliable sealing while having good structural stability and easy assembly. It works synergistically with the center seam sealing component to further improve the overall sealing reliability of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 A schematic structural diagram of a split-type back door assembly provided in an embodiment of the present application; Figure 2 for Figure 1 Cross-sectional structural diagram along line AA; Figure 3 for Figure 2 A partial enlarged view of part A in the middle; Figure 4 for Figure 2 A partial enlarged view of part B in the middle; Figure 5 A schematic diagram of a split tailgate assembly from another perspective provided in an embodiment of the present application; Figure 6 This is a schematic structural diagram of the center seam sealing assembly and the vehicle body used in an embodiment of the present application; Figure 7 For the Figure 6 Cross-sectional structural diagram along line BB.

[0027] In the figure: 1. Back door; 2. Side panel assembly; 3. Roof; 4. Back door sealing strip; 401. Bubble tube; 4011. Waterproof ridge; 402. Reinforcement sheet; 4021. Reinforcement portion; 403. Fiber filament; 5. Door frame sealing strip; 501. Sealing body; 5011. Main body; 5012. Fastening lip; 5013. Sealing lip; 502. Support frame; 6. Center seam sealing assembly; 601. Sealing baffle; 6011. Guide portion; 602. Mounting seat; 6021. Guide groove; 6021-1. Guide area; 6021-2. Locking area. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0029] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or indirectly on the other element. It should be understood that the terms “length”, “width”, “upper”, “lower”, “front”, “back”, “top”, “bottom”, “inner”, “outer”, etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present application.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, "several" means two or more, unless otherwise specifically defined.

[0031] It should be noted that the directions or positional relationships indicated by "front", "rear", "inside", "outside", "up" and "down" in this embodiment are based on the direction of the vehicle itself, where the head of the vehicle represents "front", the tail of the vehicle represents "rear", the top of the vehicle represents "up", and the bottom of the vehicle represents "down", the "inside" side refers to the side facing inside the cab, and the "outside" side refers to the side facing outside the cab.

[0032] In addition, the front and rear directions of the vehicle body defined in the embodiments of the present application refer to the front and rear directions of the forward direction of the vehicle during driving, the left and right directions of the vehicle body defined refer to the left and right directions of the forward direction of the vehicle during driving, and the up and down directions of the vehicle body defined refer to the up and down directions of the forward direction of the vehicle during driving.

[0033] It should be noted that the “longitudinal center plane” refers to the vertical center plane parallel to the front-to-back direction.

[0034] Please also refer to Figures 1 to 7 The split-type tailgate assembly and vehicle provided in this application are now described. The split-type tailgate assembly includes a tailgate assembly and a center seam sealing assembly 6. The tailgate assembly includes a tailgate 1 rotatably connected to the vehicle body and a tailgate sealing strip 4 provided on the tailgate 1. Two tailgates 1 are provided, and the two tailgates 1 are symmetrically arranged with respect to the longitudinal center plane of the vehicle. When the tailgate 1 is closed, the tailgate sealing strip 4 abuts the vehicle body. The center seam sealing assembly 6 is rotatably connected to one of the tailgates 1 with the vertical direction as a rotating axis and corresponds to the center seam of the two tailgates 1. When the tailgate 1 is closed, the tailgate 1 and the center seam sealing assembly 6 respectively apply a compressive force to the tailgate sealing strip 4 in the front-to-back direction.

[0035] Compared with the prior art, the double-door back door assembly provided by the present application is rotatably connected to one of the back doors 1 through the center seam sealing component 6, so that when the back door 1 is closed, the center seam sealing component 6 covers the center seam between the two back doors 1. After the back doors 1 are closed, the back door sealing strips 4 on the two back doors 1 abut against the center seam sealing component 6 and the vehicle body. Since the back door 1 and the center seam sealing component 6 apply an extrusion force to the back door sealing strip 4 in the front-to-back direction, the back door sealing strip 4 can effectively fill the gap between the back door 1 and the center seam sealing component 6, thereby improving the waterproof and dustproof performance. At the same time, the back door sealing strip 4 corresponding to the vehicle body fills the gap between the back door 1 and the vehicle body, thereby sealing the outer area of ​​the back door 1. The present application does not require the provision of an angle structure, which reduces the diversity and complexity of the structure. It not only facilitates mold development and component production, but also reduces the positioning difficulty and rework rate during the assembly process, thereby reducing production and assembly costs. At the same time, a center seam sealing structure is added to seal with the rear door 1 and the rear door sealing strip 4 to form an integral module, which not only retains the advantage of the easy opening of the double-door structure, but also avoids the problem of poor sealing performance of the traditional double-door structure with the shielded extrusion sealing structure.

[0036] Working process: When closing the split tailgate assembly, the two symmetrically positioned tailgates 1 rotate about their respective connecting axes to the vehicle body, gradually moving toward the closed position. During the closing process, the center seam sealing assembly 6 rotates synchronously with the tailgate 1 to which it is connected, gradually approaching the center seam of the other tailgate 1.

[0037] When the tailgate 1 is fully closed, the tailgate sealing strips 4 of both tailgates 1 abut against the vehicle body, while the center seam sealing assembly 6 fits against the center seam of the two tailgates 1. At this point, the tailgate 1 and the center seam sealing assembly 6 exert compressive force on the tailgate sealing strips 4 in the front-to-back direction, causing them to elastically deform and tightly fill the gaps between the tailgate 1 and the vehicle body, as well as the center seam of the two tailgates 1, forming a multi-sealing structure that effectively seals the tailgate.

[0038] When the back door needs to be opened, the two back doors 1 rotate in opposite directions around their respective connecting shafts, and the center seam sealing assembly 6 rotates together with the corresponding back door 1, breaking away from the fitting state with the other back door 1. The extrusion force on the back door sealing strip 4 disappears, and the back door returns to its original state, and the back door opens smoothly.

[0039] Optionally, the tailgate sealing strip 4 is a closed structure, connected end to end, and its shape matches that of the tailgate 1. This closed structure avoids the gaps that may occur at the joints of traditional sealing strips, eliminating the sealing breakpoints caused by splicing. It can completely block rainwater, dust, and other particles from entering the vehicle through the gap between the tailgate 1 and the vehicle body, thereby enhancing waterproof and dustproof performance. Furthermore, the design, which conforms to the shape of the tailgate 1, ensures that the tailgate sealing strip 4 fits perfectly with the edge of the tailgate 1. When the tailgate 1 and the center seam sealing assembly 6 apply compressive force, the force is more evenly distributed across the sealing strip, reducing the possibility of localized excessive or insufficient force, reducing the probability of localized wear and aging of the sealing strip, and extending its service life.

[0040] Optionally, the back door sealing strip 4 includes a retaining groove for receiving pressure-sensitive or heat-sensitive tape, which is then bonded to the back door 1. This retaining groove provides precise accommodation for the pressure-sensitive or heat-sensitive tape, ensuring accurate positioning during application and preventing uneven bonding due to tape shifting. This simplifies the assembly process and improves production efficiency. Pressure-sensitive tape allows for quick initial attachment, while heat-sensitive tape enhances bond strength during subsequent processing (such as baking). The compatibility of these two tapes allows for flexible connection between the sealing strip and the back door 1, meeting the needs of diverse production scenarios.

[0041] Optionally, a magnetic part is provided on the side of the center seam sealing structure away from the hinged end, and a magnetic part is provided in the area of ​​the other tailgate 1 corresponding to the adsorption part. When the tailgate 1 is closed, the magnetic parts are attracted to each other. When the double-door tailgate is closed, the two tailgates 1 rotate inward around their respective hinged ends. As the closing action is nearing completion, the magnetic part of the center seam sealing assembly 6 gradually approaches the magnetic part on the other tailgate 1. When the distance reaches the range of magnetic attraction, the two are attracted to each other due to the magnetic field force, generating a pre-tightening force to assist in guiding the sealing baffle 601 to accurately align to the center seam position. After the tailgate 1 is completely closed, the adsorption force of the magnetic part and the magnetic part continues to act, so that the center seam sealing structure fits tightly to the other tailgate 1, enhancing the effect of mechanical extrusion sealing. At this time, the tailgate sealing strip 4 is simultaneously subjected to bidirectional extrusion forces from the sealing baffle 601 and the vehicle body, forming a double sealing mechanism. During vehicle operation, magnetic attraction prevents the sealing surfaces from momentarily separating due to bumps and vibrations, preventing rain and dust from seeping into the vehicle through the center seam. Especially during off-road driving or high-speed driving, the magnetic force maintains the center seam seal in contact with the rear door 1. Furthermore, to account for assembly tolerances or slight door deformation from prolonged use, the magnetic attraction automatically fine-tunes the position of the sealing baffle 601, ensuring a continuous and complete sealing path.

[0042] Optionally, the magnetic member may be a magnet, an iron member or a magnetized metal member.

[0043] Specifically, the center seam seal is a rigid component made of the same material as the tailgate 1. This rigid material provides a stable and uniform squeeze when the tailgate 1 is closed, preventing uneven pressure distribution caused by deformation. This ensures uniform force across the tailgate seal 4 and enhances the reliability of the seal. Furthermore, the same material as the tailgate 1 ensures a better match between the two in terms of deformation characteristics under conditions such as temperature fluctuations and vibration. This reduces relative displacement caused by differences in material thermal expansion and contraction or vibration frequencies, lowers the risk of seal gaps widening after prolonged use, and extends the service life of the sealing system.

[0044] See also Figures 6 and 7 In some embodiments, the center seam sealing assembly 6 includes a mounting seat 602 and a sealing baffle 601. The mounting seat 602 is fixed to the vehicle body. The mounting seat 602 is provided with a guide groove 6021, and the guide groove 6021 has an inlet connected to the outside; the sealing baffle 601 is rotatably connected to the front part of one of the tailgates 1 with the vertical direction as a rotating axis, and the sealing baffle 601 has a guide portion 6011 slidably inserted in the guide groove 6021. When the tailgate 1 is closed, the tailgate sealing strip 4 is squeezed and sealed to the sealing baffle 601 along the front-to-back direction.

[0045] When the tailgate 1 is closed, the sealing baffle 601, pivotally connected to the front portion of one tailgate 1, moves with that tailgate 1. At this point, the guide portion 6011 of the sealing baffle 601 slides through the guide slot 6021 of the mounting base 602, into the guide slot 6021. Constrained by the guide slot 6021, the sealing baffle 601 rotates smoothly in the up-and-down direction, gradually approaching the opposite tailgate 1. As the tailgate 1 continues to close, the sealing baffle 601 gradually contacts the tailgate sealing strip 4. When the tailgate 1 is fully closed, the tailgate sealing strip 4 is pressed against the sealing baffle 601 in the front-to-back direction, forming a tight seal. When the tailgate 1 is opened, the tailgate 1 drives the sealing baffle 601 to rotate in the opposite direction, and the guide portion 6011 of the sealing baffle 601 slides out of the introduction port along the guide groove 6021 and disengages from the guide groove 6021. The sealing baffle 601 then opens together with the tailgate 1, and the extrusion force on the tailgate sealing strip 4 disappears, returning to its original state.

[0046] When the guide portion 6011 of the sealing baffle 601 slides within the guide groove 6021, the guide groove 6021 precisely guides the movement of the sealing baffle 601, ensuring stable contact between the sealing baffle 601 and the tailgate sealing strip 4 during the closing of the tailgate 1. This prevents gaps in the seal caused by misalignment. Combined with the front-to-back compression of the tailgate sealing strip 4, this improves the sealing reliability of the central joint, effectively preventing the intrusion of water, dust, and other particles. Furthermore, the mounting base 602 is fixed to the vehicle body, and the guide groove 6021 firmly constrains the guide portion 6011 of the sealing baffle 601, reducing vibration during driving or when the door is opened or closed, and lowering the risk of seal failure due to vibration. Furthermore, the sealing baffle 601 is pivotally connected to the tailgate 1, allowing it to move synchronously with the tailgate 1, avoiding rigid collisions between the components and extending component life.

[0047] Optionally, the upper and lower ends of the sealing baffle 601 abut against the vehicle body in the front-to-back direction. This abutment between the upper and lower ends of the sealing baffle 601 and the vehicle body seals the upper and lower gaps between the sealing baffle 601 and the vehicle body, preventing rainwater and dust from seeping in through the gaps at the ends of the sealing baffle 601. Together with the front-to-back seal between the sealing baffle 601 and the tailgate sealing strip 4, a "wraparound" sealing structure is formed, fully covering the blind spot of the central seam and enhancing the overall waterproof and dustproofing effect.

[0048] Specifically, the sealing baffle 601 is located in front of the back door sealing strip 4 .

[0049] Optionally, the back door sealing strip 4 is provided with an interlocking groove, and the sealing baffle 601 has an interlocking protrusion protruding forward. The interlocking protrusion is adapted to the interlocking groove, and when the back door 1 is closed, the interlocking protrusion is interlocked in the interlocking groove. The interlocking protrusion and the interlocking groove interlock with each other to form a mechanical interlocking seal, which cooperates with the elastic extrusion of the back door sealing strip 4 to achieve a double seal. The concave-convex meshing structure increases the contact area and friction of the sealing surface, reduces the relative sliding of the sealing surface caused by vibration during vehicle driving, and improves the sealing stability. At the same time, the combination of the interlocking protrusion and the interlocking groove can help resist water pressure (such as in heavy rain), prevent water from penetrating along the gaps in the sealing surface, and guide water flow to the sides, reducing the impact of local water accumulation on the sealing performance.

[0050] Optionally, the mounting base 602 and the vehicle body are an integral component.

[0051] Optionally, the mounting seat 602 is welded, screwed or clamped to the vehicle body, and an elastic buffer is provided between the mounting seat 602 and the vehicle body. The elastic buffer is used to alleviate the vibration force between the mounting seat 602 and the vehicle body. The elastic buffer can be a rubber component. When the vehicle body vibration caused by driving or the impact force when the tailgate 1 is closed is transmitted to the mounting seat 602, the elastic buffer can absorb the vibration energy, reduce the rigid collision between the guide groove 6021 and the guide portion 6011 of the sealing baffle 601, and reduce the risk of abnormal noise. At the same time, this embodiment also allows the mounting seat 602 to adaptively adjust its position within a small range to compensate for the slight deformation of the vehicle body caused by temperature changes or long-term use, ensure that the guide groove 6021 always accurately matches the movement trajectory of the sealing baffle 601, and avoid sealing failure due to positioning deviation. In addition, the rubber component has an insulating effect, which can reduce electrochemical corrosion between metal parts and extend the service life of the mounting seat 602.

[0052] Optionally, a pressure detector is installed on the front of the sealing baffle 601, and an indicator light is installed in the cab. Both the pressure detector and the indicator light are connected to the vehicle's control system. When the tailgate 1 is closed and the sealing pressure reaches a preset value, the pressure detector is energized, and the indicator light illuminates. If the sealing pressure is insufficient (e.g., due to aging of the sealing strip or assembly deviation), the indicator light flashes to warn. This seal status monitoring mechanism, formed by the pressure detector on the front of the sealing baffle 601 and the indicator light in the cab, in conjunction with the vehicle control system, provides real-time and intuitive assurance of the sealing performance of the bi-fold tailgate. When the tailgate 1 is closed, the pressure detector accurately detects whether the sealing pressure has reached the preset standard, and the control system links the indicator light with feedback. When the pressure is within the standard, the indicator light stays on. If the pressure is insufficient due to aging of the sealing strip or assembly deviation, the indicator light flashes to warn, promptly alerting the user or maintenance personnel to rectify the problem. This embodiment not only solves the problem of traditional sealing structures being difficult to intuitively judge, but also reduces problems such as water leakage, dust ingress, and increased noise caused by undetected sealing failure. It also facilitates rapid assembly quality testing on the production line, reducing the risk of defective products being shipped. At the same time, for daily use, real-time monitoring can prevent small faults from turning into big problems, extend the service life of sealing components, and reduce maintenance costs; for the driving experience, clear feedback on the sealing status can enhance the sense of safety in use, especially in harsh environments such as heavy rain, sandstorms, etc., making users more confident in the vehicle's protection performance, further improving the vehicle's reliability and intelligence level.

[0053] See also Figures 3 and 4 In some embodiments, the back door sealing strip 4 includes a bubble tube 401 and a reinforcing sheet 402 provided in the bubble tube 401. The bubble tube 401 is connected to the back door 1. The reinforcing sheet 402 radially divides the inner cavity of the bubble tube 401 into two independent chambers. The reinforcing sheet 402 is used to provide support for the bubble tube 401 in the front and rear directions.

[0054] The reinforcement sheet 402 provides stable support for the bubble tube 401 in the front-to-back direction. When the tailgate sealing strip 4 is squeezed and sealed against the sealing baffle 601 in the front-to-back direction, the reinforcement sheet 402 resists excessive deformation of the bubble tube 401, preventing collapse or loss of elasticity of the bubble tube 401 due to excessive squeezing force. This ensures that the bubble tube 401 always maintains a tight fit with the sealing baffle 601, maintains stable sealing pressure, and reduces gaps caused by inadequate sealing surface contact. If slight displacement or pressure fluctuations occur between the sealing baffle 601 and the tailgate sealing strip 4 during vehicle operation or door closing, the two chambers absorb the impact through independent elastic deformation, adapting to the sealing requirements of different areas (e.g., the chamber on the side closest to the reinforcement sheet 402 focuses on support, while the chamber on the other side focuses on cushioning). This enhances the seal's adaptability and ensures a continuous seal even with slight assembly deviations or vehicle body vibrations.

[0055] Furthermore, the presence of reinforcement sheet 402 can slow the aging and fatigue of the bulb tube 401. While traditional single-chamber bulb tubes 401 are susceptible to localized elastic degradation due to prolonged compression, the dual-chamber structure separated by reinforcement sheet 402 disperses stress, reducing localized excessive stretching or compression of the bulb tube 401 and extending the overall service life of the sealing strip. Furthermore, the integration of reinforcement sheet 402 and bulb tube 401 balances the overall rigidity of the sealing strip, preserving the elastic sealing properties of the bulb tube 401 while also avoiding insufficient sealing pressure through the support of reinforcement sheet 402, further enhancing the sealing effect of the central joint.

[0056] See also Figures 3 and 4 In some embodiments, the reinforcing sheet 402 has a reinforcing portion 4021 bent toward one of the cavities, and the reinforcing portion 4021 is used to improve the bending strength of the reinforcing sheet 402 .

[0057] The bent reinforcement 4021 changes the cross-sectional shape of the reinforcement sheet 402, significantly enhancing its resistance to bending deformation compared to a straight structure. When the tailgate sealing strip 4 is subjected to compressive forces in the front-to-back direction, the reinforcement 4021 deforms in the direction of its fold. Because the reinforcement 4021 itself has a bend, it reduces the risk of localized stress concentration and subsequent fracture caused by long-term stress deformation. This application maintains effective support for the bubble tube 401 even under long-term, high-frequency extrusion or high-pressure shocks, preventing localized collapse of the bubble tube 401 due to support failure and ensuring a tight fit of the sealing surface.

[0058] Optionally, the reinforcing sheet 402 comprises a first sheet and a second sheet arranged at an angle, with a reinforcing portion 4021 formed at the junction of the first and second sheets. When the tailgate sealing strip 4 is subjected to compressive forces in the front-to-back direction, the first and second sheets can jointly disperse the stress through the reinforcing portion 4021 at the angle, preventing deformation of the reinforcing sheet 402 due to localized excessive forces and ensuring continuous and stable support for the bubble tube 401. This structure effectively addresses transient impact forces caused by long-term, high-frequency compression or vehicle body vibration, preventing the bubble tube 401 from collapsing due to support failure and ensuring a tight fit on the sealing surface.

[0059] Optionally, the thickness of the reinforcement portion 4021 is greater than that of other areas of the reinforcement sheet 402 .

[0060] See also Figures 3 and 4 In some embodiments, the back door sealing strip 4 further includes a fiber filament 403 passing through the bubble tube 401 . The fiber filament 403 extends along the axis of the bubble tube 401 to enhance the shrinkage resistance of the bubble tube 401 .

[0061] Fiber filaments 403 extend along the axis of bulb 401, exerting axial tension and restraint on bulb 401. During long-term use, bulb 401 is susceptible to axial shortening due to thermal expansion and contraction or material shrinkage. Fiber filaments 403, with their high tensile strength, effectively resist this shrinkage, minimizing dimensional changes in bulb 401 along its length. This prevents gaps between bulb 401 and the sealing surface due to shrinkage, thereby ensuring the integrity of the sealing path.

[0062] At the same time, the combination of fiber filaments 403 and bulb 401 also enhances the overall structural stability of bulb 401. When bulb 401 is subjected to external forces such as compression and friction, fiber filaments 403 can disperse some of the stress, reducing the cumulative deformation of bulb 401 caused by excessive localized force. This is especially true during long-term, high-frequency door opening and closing. This can reduce shrinkage fatigue caused by repeated deformation of bulb 401 and prolong its ability to maintain its original size and shape.

[0063] Furthermore, the addition of fiber filaments 403 does not affect the elastic sealing performance of the bubble tube 401. Fiber filaments 403 primarily act to resist axial shrinkage, while the radial elastic deformation of the bubble tube 401 (for sealing and extrusion) remains functional. This ensures that the sealing strip maintains excellent cushioning and conformability while maintaining shrinkage resistance, thus balancing dimensional stability and sealing reliability.

[0064] See also Figure 4 In some embodiments, the bubble tube 401 has waterproof ridges 4011 spaced apart along its circumference, and the waterproof ridges 4011 are used to achieve extrusion sealing with the center seam sealing component 6 or the vehicle body.

[0065] When the tailgate 1 is closed, the bubble tube 401 moves with the tailgate 1, and its circumferentially spaced waterproof ridges 4011 gradually come into contact with the center seam sealing assembly 6 or the vehicle body. As the tailgate 1 continues to close, the waterproof ridges 4011 are squeezed in the front-to-back direction, elastically deforming and tightly fitting the center seam sealing assembly 6 or the vehicle body surface, forming multiple independent sealing barriers. When the tailgate 1 is opened, the squeezing force on the waterproof ridges 4011 disappears, and the waterproof ridges 4011 return to their original shape. This embodiment achieves a multi-pass squeeze seal through the circumferentially spaced waterproof ridges 4011. Even if a waterproof ridge 4011 fails due to local wear or a small gap, the remaining waterproof ridges 4011 can still maintain sealing performance, significantly reducing the risk of water leakage and dust ingress. Furthermore, the elastic deformation of the waterproof ridges 4011 can adapt to different squeezing amounts. Even if the vehicle vibrates or there are slight deviations in assembly, deformation compensation can still ensure a tight fit, improving the reliability of the seal. In addition, the waterproof ridges 4011 can concentrate and disperse the squeezing force, reduce the overall stress burden on the bubble tube 401 , delay aging and wear of the bubble tube 401 , and extend the service life of the back door sealing strip 4 .

[0066] See also Figure 7 In some embodiments, the guide groove 6021 includes a locking area 6021-2 and a guide area 6021-1 that are connected to each other. The locking area 6021-2 extends in the left and right directions. One end of the guide area 6021-1 is connected to the locking area 6021-2, and the other end is bent backward and connected to the outside. The guide area 6021-1 is an arc-shaped groove body.

[0067] When the tailgate 1 is closed, the guide portion 6011 of the sealing baffle 601 enters from the external connecting end of the guide area 6021-1. The arc-shaped guide area 6021-1 can guide the guide portion 6011 of the sealing baffle 601 to move smoothly, reducing the jamming during the movement, so that the sealing baffle 601 can rotate more smoothly when the tailgate 1 is subsequently rotated; then the guide portion 6011 enters the locking area 6021-2 extending in the left and right directions. The locking area 6021-2 can form a left and right limit for the guide portion 6011, preventing the sealing baffle 601 from shifting left and right due to vehicle vibration and other factors after the tailgate 1 is closed, ensuring that the sealing baffle 601 is accurately aligned with the tailgate sealing strip 4, and ensuring that the tailgate sealing strip 4 is squeezed and sealed to the sealing baffle 601 in the front and rear directions. At the same time, the backward bending design of the guide area 6021-1 is adapted to the rotation trajectory of the tailgate 1, which can make the movement of the guide part 6011 more in line with the movement law of the tailgate 1, reduce the friction loss between the guide part 6011 and the guide groove 6021 during movement, and extend the service life of the components; the connection design of the locking area 6021-2 and the guide area 6021-1 realizes the smooth transition of the guide part 6011 from guiding to locking, further improving the continuity and stability of the operation of the center seam sealing assembly 6.

[0068] Optionally, a brush seal is provided within the guide area 6021-1 to clean impurities from the guide portion 6011. When the tailgate 1 is closed, the guide portion 6011 of the sealing baffle 601 gradually slides along the guide area 6021-1 into the guide groove 6021. At this point, the brush seal provided within the guide area 6021-1 comes into contact with the surface of the guide portion 6011. As the guide portion 6011 continues to move, the bristles of the brush seal adhere tightly to the surface of the guide portion 6011 through their elasticity, scraping away impurities such as dust, sand, and fallen leaves, ensuring that the guide portion 6011 remains clean before entering the locking area 6021-2. During this process, the brush seal can adaptively adjust its contact angle to follow the movement of the guide portion 6011, preventing impurities from entering the deeper portions of the guide groove 6021 along with the guide portion 6011 and causing accumulation. This embodiment effectively prevents the accumulation of impurities within guide groove 6021, avoiding impurities that could cause the guide portion 6011 to become stuck or reduce guiding accuracy, thereby ensuring smooth operation of the center seam sealing assembly 6 and is particularly suitable for dusty, rainy, or muddy road conditions. Furthermore, it not only reduces the wear and tear on the guide portion 6011 and guide groove 6021 caused by impurities, reducing component wear due to friction and extending service life, but also ensures closer contact between the cleaned guide portion 6011 and guide groove 6021, ensuring the precise positioning of the sealing baffle 601 when the tailgate 1 is closed, maintaining the stability of the sealing structure, and indirectly improving sealing performance. This solution eliminates the need for users to frequently manually clean the guide groove 6021, reducing maintenance costs and operational complexity, and improving the convenience and reliability of vehicle use.

[0069] Optionally, the brush seal strip is bonded to the mounting base 602. After a period of use, impurities such as dust may adhere to the brush seal strip, and the brush seal strip can be easily replaced and cleaned by bonding.

[0070] Optionally, a tiny drainage hole is provided at the bottom of the locking area 6021-2 of the guide groove 6021, and a drainage channel is designed within the mounting base 602 to drain any infiltrated water or cleaned impurities to the exterior of the vehicle (e.g., connected to the rear bumper drainage system). When rainwater, car wash water, or other substances enter the locking area 6021-2 of the guide groove 6021, the tiny drainage holes at the bottom of the locking area 6021-2 promptly collect the accumulated liquid and impurities. These liquids and impurities flow through the drainage holes into the drainage channel within the mounting base 602. The drainage channel extends along the structure of the mounting base 602 and connects to external drainage pathways, such as the vehicle's rear bumper drainage system, ultimately draining the water and impurities smoothly out of the vehicle. Even when the vehicle is jolted or tilted, the drainage channel's angle and path design ensure that accumulated liquid does not remain in the locking area 6021-2, ensuring continuous and efficient drainage. This solution prevents rusting of components in the locking area 6021-2 due to accumulated water. It also prevents frozen water from freezing and causing the guide portion 6011 to become stuck, ensuring the proper operation of the center seam sealing assembly 6. Furthermore, the timely removal of impurities prevents their accumulation in the locking area 6021-2, thus avoiding increased friction between the guide portion 6011 and the guide groove 6021 and extending the service life of the components. The coordination of the drainage holes and the drainage channel, combined with the cleaning function of the brush seal strip, further enhances the reliability of the center seam sealing structure and reduces the risk of seal failure due to impurities or accumulated water. Furthermore, manual cleaning of the guide groove 6021 is no longer necessary, reducing maintenance costs. The integrated design of the drainage channel with the vehicle's existing drainage system also avoids the impact of additional openings on the vehicle's structural strength, ensuring both practicality and safety.

[0071] Based on the same inventive concept, the present application also provides a vehicle. Figure 1 and Figure 5 The vehicle includes a vehicle body and the above-mentioned split-type tailgate assembly.

[0072] The vehicle provided by the present invention adopts the above-mentioned double-door tailgate assembly, which is rotatably connected to one of the tailgates 1 through the center seam sealing component 6. When the tailgate 1 is closed, the center seam sealing component 6 covers the center seam between the two tailgates 1. After the tailgate 1 is closed, the tailgate sealing strips 4 on the two tailgates 1 abut against the center seam sealing component 6 and the vehicle body. Since the tailgate 1 and the center seam sealing component 6 apply an extrusion force to the tailgate sealing strip 4 in the front-to-back direction, the tailgate sealing strip 4 can effectively fill the gap between the tailgate 1 and the center seam sealing component 6, thereby improving the waterproof and dustproof performance. At the same time, the tailgate sealing strip 4 corresponding to the vehicle body fills the gap between the tailgate 1 and the vehicle body, thereby sealing the outer area of ​​the tailgate 1. The present application does not require the provision of an angle structure, which reduces the diversity and complexity of the structure. It not only facilitates mold development and component production, but also reduces the positioning difficulty and rework rate during the assembly process, thereby reducing production and assembly costs. At the same time, a center seam sealing structure is added to seal with the rear door 1 and the rear door sealing strip 4 to form an integral module, which not only retains the advantage of the easy opening of the double-door structure, but also avoids the problem of poor sealing performance of the traditional double-door structure with the shielded extrusion sealing structure.

[0073] See also Figure 2 and Figure 4 In some embodiments, the vehicle body includes a side panel assembly 2 and a roof 3 arranged on the inner side of the side panel assembly 2. The vehicle also includes a door frame sealing strip 5 connected to the side panel assembly 2. The door frame sealing strip 5 is used to achieve sealing between the side panel assembly 2 and the roof 3.

[0074] The door frame sealing strip 5 tightly fills the gap between the side panel assembly 2 and the roof 3, forming a reliable sealing barrier that prevents rainwater, dust, and other substances from entering the vehicle through the connection between the two, preventing leakage that could affect the interior environment or cause corrosion of vehicle components. This sealing method also enhances the structural stability of the connection between the side panel assembly 2 and the roof 3, reducing frictional noise caused by vibration during driving and improving driving comfort. Furthermore, the door frame sealing strip 5 requires no complex structural coordination, making it easy to install and low-maintenance. It maintains a good sealing effect over the long term, and synergizes with other sealing structures, such as the center seam sealing assembly 6, to further enhance the vehicle's overall sealing reliability.

[0075] It should be noted that the "ceiling 3" in this application refers to the decorative covering installed inside the vehicle. It is an important component of the vehicle interior, including not only the top covering but also the side panels. The ceiling 3 is typically composed of multiple layers of material, generally including a surface layer, a foam layer, and a base material. The surface layer primarily serves a decorative and aesthetic purpose, providing different textures and appearance effects; the foam layer provides insulation, sound absorption, and insulation, enhancing interior comfort; and the base material provides support and anchoring for the entire ceiling 3, allowing it to be securely installed on the vehicle roof.

[0076] See also Figure 4 In some embodiments, the door frame sealing strip 5 includes a sealing body 501 and a support frame 502 inserted into the sealing body 501. The sealing body 501 is provided with an installation groove, the side panel assembly 2 is inserted into the installation groove, and the sealing body 501 is also overlapped and sealed with the ceiling 3, and the support frame 502 is arranged on the periphery of the installation groove.

[0077] The sealing body 501 forms a plug-in fit with the side panel assembly 2 through the mounting groove, which can quickly achieve precise positioning, ensure that the connection between the sealing body 501 and the side panel assembly 2 is firm and tight, and reduce the sealing gap caused by assembly deviation. At the same time, the overlapping seal between the sealing body 501 and the roof 3 can cover the transition area between the side panel assembly 2 and the roof 3, forming a continuous sealing path to prevent rainwater and dust from seeping in through the connection gap between the two. The support frame 502 outside the mounting groove can provide rigid support for the sealing body 501, enhance the structural strength of the mounting groove, prevent the sealing body 501 from being deformed due to the plug-in force of the side panel assembly 2 or the vibration of the vehicle, and ensure the long-term stability of the plug-in seal between the mounting groove and the side panel assembly 2. In addition, the support frame 502 can also disperse the external force on the sealing body 501, reduce the wear or deformation of the sealing body 501 at the overlap with the roof 3, and extend the service life of the sealing strip. This embodiment enables the door frame sealing strip 5 to achieve reliable sealing while having good structural stability and easy assembly, and cooperates with the center seam sealing component 6 to further improve the overall sealing reliability of the vehicle.

[0078] Optionally, the support frame 502 is a rigid, "U"-shaped member. This "U"-shaped structure provides an embracing support around the periphery of the mounting slot, evenly distributing the radial force generated when the side panel assembly 2 is inserted into the mounting slot. This prevents deformation of the mounting slot due to excessive localized force, ensures a precise fit between the mounting slot and the side panel assembly 2, and provides a stable foundation for the elastic extrusion seal of the fastening lip 5012. Furthermore, the rigid "U"-shaped support frame 502 is less susceptible to deformation due to vehicle vibration or prolonged use, maintaining long-term support strength for the mounting slot and reducing sealing performance degradation caused by structural relaxation of the sealing body 501.

[0079] As a specific embodiment of the sealing body 501, please refer to Figure 4 The sealing body 501 includes a main body 5011, a fastening lip 5012 and a sealing lip 5013. The mounting groove is opened in the main body 5011. The fastening lip 5012 is arranged in the mounting groove and connected to the main body 5011. The fastening lip 5012 is used to abut and cooperate with the side panel assembly 2. The sealing lip 5013 is connected to the outside of the main body 5011 and realizes overlapping sealing with the ceiling 3.

[0080] The main body 5011 provides stable support for the mounting groove, fastening lip 5012, and sealing lip 5013, ensuring the coordinated function of all components. The fastening lip 5012 within the mounting groove abuts against the side panel assembly 2, creating a tight, elastic squeeze after the side panel assembly 2 is inserted into the mounting groove. Even with slight dimensional errors or assembly deviations, the fastening lip 5012 deforms to compensate for the gap, enhancing the seal between the mounting groove and the side panel assembly 2 and effectively preventing water and dust from entering through the insertion area. The sealing lip 5013 outside the main body 5011 fits tightly against the surface of the roof 3, covering the transition gap between the side panel assembly 2 and the roof 3, forming a continuous sealing barrier and avoiding blind spots. At the same time, the fastening lip 5012 and the sealing lip 5013 can respectively adapt to the different sealing requirements of the side panel assembly 2 and the roof 3. The fastening lip 5012 focuses on rigid abutment to ensure stable installation, and the sealing lip 5013 focuses on flexible overlap to improve fitting accuracy. The cooperation between the two makes the sealing performance of the door frame sealing strip 5 more targeted and comprehensive, and further cooperates with the center seam sealing component 6 to improve the overall sealing effect of the vehicle.

[0081] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. The split back door assembly is characterized by: include: A back door assembly comprises a back door (1) rotatably connected to a vehicle body and a back door sealing strip (4) provided on the back door (1), wherein two back doors (1) are provided, and the two back doors (1) are symmetrically arranged with respect to the longitudinal center plane of the vehicle, and when the back door (1) is closed, the back door sealing strip (4) abuts against the vehicle body; and A center seam sealing assembly (6) is rotatably connected to one of the back doors (1) with an up-down direction as a rotating shaft and corresponds to the center seam of the two back doors (1). When the back door (1) is closed, the back door (1) and the center seam sealing assembly (6) respectively apply an extrusion force to the back door sealing strip (4) in the front-back direction.

2. The split-type back door assembly according to claim 1, characterized in that: The center seam sealing assembly (6) comprises: A mounting seat (602) is fixed to the vehicle body, the mounting seat (602) is provided with a guide groove (6021), and the guide groove (6021) has an inlet connected to the outside; and The sealing baffle (601) is connected to the front part of one of the back doors (1) by rotating in the up-down direction with a rotating shaft, and the sealing baffle (601) has a guide portion (6011) that is slidably inserted into the guide groove (6021). When the back door (1) is closed, the back door sealing strip (4) is squeezed and sealed on the sealing baffle (601) in the front-to-back direction.

3. The split-type back door assembly according to claim 1, characterized in that: The back door sealing strip (4) comprises a bubble tube (401) and a reinforcing sheet (402) arranged in the bubble tube (401); the bubble tube (401) is connected to the back door (1); the reinforcing sheet (402) radially divides the inner cavity of the bubble tube (401) into two independent chambers; and the reinforcing sheet (402) is used to provide support force for the bubble tube (401) in the front-to-back direction.

4. The split-type back door assembly according to claim 3, characterized in that: The reinforcing sheet (402) has a reinforcing portion (4021) bent toward one of the chambers, and the reinforcing portion (4021) is used to improve the bending strength of the reinforcing sheet (402).

5. The split-type back door assembly according to claim 3, characterized in that: The back door sealing strip (4) further comprises a fiber filament (403) passing through the bubble tube (401), wherein the fiber filament (403) extends along the axis of the bubble tube (401) and is used to improve the shrinkage resistance of the bubble tube (401).

6. The split-type back door assembly according to claim 3, characterized in that: The bubble tube (401) has waterproof convex strips (4011) distributed at intervals along its circumference, and the waterproof convex strips (4011) are used to achieve extrusion sealing with the center seam sealing component (6) or the vehicle body.

7. The split-type back door assembly according to claim 2, wherein: The guide groove (6021) includes a locking area (6021-2) and a guide area (6021-1) that are connected to each other. The locking area (6021-2) extends in the left-right direction. One end of the guide area (6021-1) is connected to the locking area (6021-2), and the other end is bent backward and connected to the outside. The guide area (6021-1) is an arc-shaped groove body.

8. A vehicle, characterized in that The utility model comprises a vehicle body and a split-type tailgate assembly according to any one of claims 1 to 7.

9. The vehicle according to claim 8, wherein: The vehicle body comprises a side panel assembly (2) and a roof (3) arranged on the inner side of the side panel assembly (2); the vehicle further comprises a door frame sealing strip (5) connected to the side panel assembly (2); the door frame sealing strip (5) is used to achieve sealing between the side panel assembly (2) and the roof (3).

10. The vehicle according to claim 9, wherein: The door frame sealing strip (5) comprises a sealing body (501) and a support frame (502) inserted into the sealing body (501); the sealing body (501) is provided with a mounting groove, the side panel assembly (2) is inserted into the mounting groove, and the sealing body (501) is also overlapped and sealed with the ceiling (3); the support frame (502) is arranged on the periphery of the mounting groove.

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