SUV back door welding assembly and automobile

Abstract

The application discloses a novel SUV back door welding assembly, which comprises a back door outer plate and a back door inner plate welding assembly; the back door outer plate, a spoiler decoration part and a back door middle outer decoration part form a back door outer shape, and the back door outer plate fixes the spoiler decoration part, the back door middle outer decoration part and back door glass. The SUV back door solves the problem of stamping process difficulty of the integral back door inner plate by means of split design of the back door inner plate main body, and further structural optimization and material utilization optimization.

Description

Technical Field

[0001] This invention relates to the field of automotive structural technology, specifically to a welded assembly for the rear hatch of an SUV and the automobile itself. Background Technology

[0002] The tailgate welding assembly of SUV models is large in size and heavy in weight. At the same time, more power tailgates are being equipped on the market, which places higher demands on the precision of the tailgate. The large size and heavy weight of the tailgate of SUV models further increases the requirements for the overall torsional stiffness and lateral stiffness of the tailgate. The tailgate area is prone to vibration and abnormal noise, so the connection and reinforcement of the internal structure of the tailgate welding assembly should be well designed to meet the modal requirements of the body-in-white. CN110816232A discloses "a kind of automobile tailgate", which includes an outer tailgate panel, an inner tailgate panel, and a lower window frame reinforcement plate. The inner tailgate panel includes three support beam features, which are connected to the lower window frame reinforcement plate. The three support beam features of the inner tailgate panel have poor stamping processability and rigidity. At the same time, the connection between the inner tailgate panel and the lower window frame reinforcement is limited to the tailgate structure. The overall stiffness and modal performance of the tailgate are low, and the structure needs further optimization. The disclosure number CN216034681U discloses "Automotive Rear Door Structure", such as Figure 1 As shown, it includes the outer rear door panel, the inner rear door panel, and the window frame reinforcement plate. The inner rear door panel and the window frame reinforcement plate are connected to form the actual inner rear door panel assembly. The design of the reinforcement connecting the inner and outer rear door panels is insufficient, resulting in low overall stiffness and modal performance of the rear door. The open space in the middle of the inner rear door panel body is too large, resulting in low material utilization. Summary of the Invention

[0003] Currently, large and medium-sized SUVs have a relatively deep overall X-axis tailgate design, with an added outer decorative panel and a continuous light strip in the middle. The tailgate is large in size and heavy in weight. At the same time, the performance requirements for the tailgate of large and medium-sized SUVs are further increased. This invention proposes a brand-new SUV tailgate welding assembly design that meets the requirements for tailgate bending and torsional stiffness, modal stiffness, and mounting point stiffness. It also optimizes the structural segmentation and material utilization of the tailgate welding assembly components to achieve lightweight design.

[0004] To achieve the above requirements, the technical solution of the present invention is as follows: A welding assembly for an SUV tailgate includes a tailgate outer panel and a tailgate inner panel welding assembly. The tailgate outer panel, together with the spoiler trim and the tailgate center exterior trim, forms the external shape of the tailgate. The tailgate outer panel also fixes the spoiler trim, the tailgate center exterior trim, and the tailgate glass. This area of ​​the tailgate outer panel is covered and is not exposed, allowing for structural surface design and welding to increase the connection between the tailgate inner and outer panels and improve the performance of the tailgate welding assembly. The rear tailgate inner panel welding assembly is connected to the rear tailgate outer panel via an edge banding, and an additional welding point is added on both the left and right sides in the middle to facilitate the load-bearing capacity of the rear tailgate trim. The rear tailgate inner panel is the main component of the rear tailgate inner panel welding assembly. Due to the prominent rear tailgate design, to solve the difficulty of stamping a one-piece rear tailgate inner panel, a split design is adopted. The segmentation of the rear tailgate inner panel highlights the structural optimization and material utilization optimization of the rear tailgate welding assembly. After conceptualization and analysis, the main segments of the rear tailgate inner panel are the main body of the rear tailgate inner panel and the wiper reinforcement. Taking into account the process and material utilization of each component, the local structures of the left and right rear tailgate support rod reinforcements are integrated with the main structure of the rear tailgate inner panel. The wiper reinforcement components together form the inner circumference of the glass; the upper and lower edges of the main frame of the rear tailgate inner panel are respectively the edge-sealing adhesive surface and the glass adhesive surface, which together with the rear tailgate outer panel. The design of the upper and lower edges is based on the shape of the glass and the spoiler; the optimized cross-sectional structure of the left and right frames of the main structure of the rear tailgate inner panel affects the black edge of the glass, as well as the bending and torsional stiffness and lightweight of the rear tailgate. The cross-section of the main side frame of the rear tailgate inner panel is simplified to five stepped surfaces, forming a "U"-shaped opening structure. The overall drawing process of the parts has been optimized. The panel structure of the rear tailgate inner panel is designed with a V-beam structure feature to improve the bending and torsional stiffness of the through side frame. To improve the performance of mid-to-large SUV models, the interior of the main panel of the rear tailgate inner panel and the rear tailgate outer panel need to be further refined. To further enhance connectivity, the V-beam structure of the inner panel is extended inward to form the inner panel structure surface, improving performance and material utilization. Through-holes are created in the inner panel structure surface, and a lateral flange is formed at the through-holes for welding to the central structure of the outer rear door panel. The upper part of the inner panel structure surface is further connected to the wiper reinforcement. After the main structure of the rear door inner panel is formed, a secondary shaping and flange are applied to create an overlap surface with the raised surface of the wiper reinforcement, which is then welded. The upper part of the V-beam feature of the rear door inner panel surrounds the wiper reinforcement, the left rear door support rod reinforcement, and the right rear door support rod reinforcement. The wiper reinforcement, along with the left and right rear door support rod reinforcements, forms the lower edge of the rear door glass bonding, creating the V-shape. The beam structure features an upper flange that overlaps with the raised surfaces of the wiper reinforcement, the left rear door support rod reinforcement, and the right rear door support rod reinforcement, forming a weld between the rear door inner panel and the left and right rear door support rod reinforcements. There are two welds between the rear door inner panel and the wiper reinforcement, and two weld points on three layers between the main body of the rear door inner panel and the wiper reinforcement, the left rear door support rod reinforcement, and the right rear door support rod reinforcement. This design enhances the bending and torsional stiffness of the rear door frame joints. The V-beam feature of the rear door inner panel prevents the upper left and right sides from extending to the lower edge of the glass bonding, improving stamping processability. The rear door frame structure cross-section design and the panel structure segmented design achieve a comprehensive balance between the main structure and performance of the rear door inner panel.

[0005] The wiper reinforcement component functions as a rear door wiper mount. Its upper part is welded to the inner edge of the rear door outer glass panel, its lower recessed surface is welded to the central structural surface of the rear door outer panel, and its sides are welded to the main body of the rear door inner panel, as well as the left and right rear door support rod reinforcement components. Due to the design of the wiper reinforcement component, the connection between the central structure of the rear door and the inner and outer panels of the side frames is strengthened, improving overall performance. The component's material thickness can be reduced for optimization. Compared to the left and right rear door support rod reinforcement components, the wiper reinforcement component has weaker functionality, and its material thickness is also reduced. To improve performance, the left and right rear door support rod reinforcements and the wiper reinforcements are divided into sections, including the lower corner node structure. The left and right rear door support rod reinforcements and the left and right rear door support rod reinforcements have similar structures and functions, and their division is calculated based on the total material utilization rate. Based on the overall performance improvement of the rear door frame, the overall rear door frame structure has been reasonably optimized in terms of structural block design and component thickness block differentiation, which is conducive to lightweight design.

[0006] To improve the overall performance of the tailgate, the lower part of the left tailgate hinge reinforcement and the upper part of the right tailgate hinge reinforcement are welded to the upper parts of the left tailgate support rod reinforcement and the right tailgate support rod reinforcement, respectively, to form the corner node structure on the tailgate glass frame. The upper and lower corner node structures are divided into blocks based on the material utilization of these parts and the overall effect.

[0007] Compared to the V-beam tailgate welded assembly, the overall modal and bending / torsional stiffness are improved by 20%, the main body material consumption of the tailgate inner panel remains unchanged, the connection relationship with the tailgate outer panel is optimized, and the design of the upper and lower corners of the side frame is reasonable. The structure and material thickness distribution of the wiper reinforcement, left hinge reinforcement, right hinge reinforcement, left tailgate support reinforcement, and right tailgate support reinforcement can be further optimized, which is conducive to lightweight design.

[0008] The advantages of this invention are as follows: The SUV tailgate welding assembly of this invention solves the problem of difficult stamping process for one-piece tailgate inner panels by designing the main body of the tailgate inner panel in separate parts; further structural optimization and material utilization are achieved; the cross-section of the main body side frame of the tailgate inner panel is simplified to five stepped surfaces, forming a "U"-shaped opening structure; the overall drawing process of the parts is optimized; the tailgate inner panel panel structure is designed with a V-beam structure feature to improve the bending and torsional stiffness of the through side frame. The V-beam structure feature of the inner panel panel structure is further extended inward to form the inner panel structure surface to improve performance and material utilization. Attached Figure Description

[0009] Figure 1 A schematic diagram of a car tailgate connection as shown in the background art; Figure 2This is a schematic diagram of the rear door welding assembly in an embodiment of the present invention; Figure 3 This is a schematic diagram of the front structure of the rear door welding assembly in an embodiment of the present invention; Figure 4 This is a schematic diagram of the back structure of the welding assembly of the inner panel of the rear door in an embodiment of the present invention; Figure 5 This is a schematic cross-sectional view of the rear door glass side frame in an embodiment of the present invention; Figure 6 This is a schematic diagram of the reverse structure of the rear door welding assembly in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the inner panel body of the rear door in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the wiper reinforcement component in an embodiment of the present invention; Figure 9 This is a partial structural diagram of the left rear tailgate hinge reinforcement on the rear tailgate inner panel welding assembly in an embodiment of the present invention. Figure 10 This is a schematic diagram of the structure of the left rear door support rod reinforcement in an embodiment of the present invention. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0011] like Figure 1 As shown in the background technology, the rear door inner panel body has a large open space in the middle, resulting in low material utilization.

[0012] Example 1 like Figure 2 As shown in the schematic diagram of the present invention, a novel SUV tailgate welding assembly 1 in this embodiment consists of a tailgate outer panel 11 and a tailgate inner panel welding assembly 12; as shown Figure 3As shown, the rear tailgate outer panel 11 and rear tailgate inner panel welding assembly 12 are edged around the outer ring 13 of the rear tailgate welding assembly 14, and welded around the inner ring 15 of the rear tailgate outer panel 11 and rear tailgate inner panel welding assembly 12 16. There is a weld on each side of the middle structural surface of the rear tailgate outer ring 17, which improves the load-bearing capacity of the outer decorative parts in the middle of the rear tailgate outer panel 11 and avoids glue cracking. Because the area below the shaping line 111 is the appearance surface, and the area above the shaping line 111 of the rear tailgate outer panel is not the appearance surface, it is used to fix the spoiler decoration, the middle outer decorative parts of the rear tailgate and the rear tailgate glass. The structure above the shaping line 111 of the rear tailgate outer panel can be welded. In this embodiment, the rear tailgate outer panel 11 and rear tailgate inner panel welding assembly 12 are welded at the middle structure 112 of the rear tailgate outer panel 18. The welding between the inner and outer panels of the rear tailgate is increased, which improves the rigidity and modal characteristics of the rear tailgate.

[0013] like Figure 4 As shown, the rear tailgate inner panel welded assembly 12 consists of the rear tailgate inner panel body 121, the left rear tailgate hinge reinforcement 123, the right rear tailgate hinge reinforcement 124, the left rear tailgate support rod reinforcement 125, the right rear tailgate support rod reinforcement 126, the wiper reinforcement 122, and the rear tailgate lock reinforcement 127. To address the issue of poor stamping process of the integrated rear tailgate inner panel due to its prominent rear tailgate design, the rear tailgate inner panel is designed as a separate unit. The rear tailgate inner panel structure consists of four parts: the rear tailgate inner panel body 121, the wiper reinforcement 122, and a portion of the left rear tailgate support rod reinforcement 125. The rear tailgate inner panel 121 is formed by enclosing a portion of the structure 1261 on the right rear tailgate support strut reinforcement 126; the rear tailgate inner panel body 121 is divided into an inner upper frame 1211, an inner left frame 1213, an inner right frame 1214, and an inner panel structure 1212. The upper and lower edges of the inner upper frame 1211 form an edge-sealing adhesive surface and a glass adhesive surface together with the rear tailgate outer panel 11, respectively. The design of the upper and lower edges of the inner upper frame 1211 is based on the shape of the glass and the spoiler; the cross-sectional structure optimization of the inner left frame 1213 and the inner right frame 1214 affects the drawing depth of the stamping process, the black edge of the glass, and the bending and torsional stiffness of the tailgate, such as... Figure 5 As shown, a spoiler 3 and glass 2 are installed on the side frame of the rear door glass. The cross-section of the side frame of the main body 121 of the rear door inner panel consists of five stepped surfaces 2131, forming a "U"-shaped opening structure. The overall drawing process of the parts has been optimized, while meeting the requirements of black glass edges and lightweight design. Figure 6 and Figure 7As shown, the inner panel structure 1212 has a V-beam structural feature 2121 to improve the bending and torsional stiffness of the through side frame. To meet the requirements of the rear door bearing the spoiler, through light, and further performance improvement of mid-to-large SUV models, the connection between the rear door inner panel structure 1212 and the rear door outer panel 11 needs to be further improved. The V-beam structural feature 2121 of the inner panel structure 1212 is further extended inward to form an inner panel structure surface 2122. A through hole 2125 is opened on the inner panel structure surface 2122, and a transverse flange 2126 is formed at the through hole. It is then welded 18 to the middle structure 112 of the rear door outer panel. The upper part of 2122 has a certain height difference with the wiper reinforcement 122. The inner panel structure surface 2122 is formed by shaping the main body 121 of the rear door inner panel and then shaping it to form a welding surface 2127 with the raised surface 1223 of the wiper reinforcement, and welded to the raised surface 1223 of the wiper reinforcement 131. The process is simplified and the overall bending and torsional stiffness of the rear door is improved. The upper part of the V-beam structure feature 2121 is surrounded by the wiper reinforcement 122, as well as the left rear door support rod reinforcement 125 and the right rear door support rod reinforcement 126. The wiper reinforcement 122, as well as the left rear door support rod reinforcement 125 and the right rear door support rod reinforcement 126 are all connected. Part 126 forms the lower edge of the tailgate glass bonding. Wiper reinforcement 122, left tailgate support rod reinforcement 125, and right tailgate support rod reinforcement 126 form the lower edge of the tailgate glass bonding and are welded to the outer glass stop edge of the tailgate. The V-beam structural features 2121, with left upper side flanges 2123 and right upper side flanges 2124, overlap on the left upper raised surface 1225 and right upper raised surface 1225 of the wiper reinforcement 122, as well as the upper raised surface 1252 of the left tailgate support rod reinforcement and the upper raised surface 1262 of the right tailgate support rod reinforcement, forming the main body 121 of the tailgate inner panel and the left tailgate support rod reinforcement 125. The welding 133 of the right rear door support rod reinforcement 126, the two welding points 134 of the rear door inner panel body 121 and the wiper reinforcement 122, and the three-layer two-point welding 135 of the rear door inner panel body 121, the wiper reinforcement 122, the left rear door support rod reinforcement 123, and the right rear door support rod reinforcement 124 are beneficial to strengthening the bending and torsional stiffness of the rear door frame nodes. The V-beam structure features 2121, the left upper side flange 2123 and the right upper side flange 2124 avoid extending to the lower edge of the glass bonding, which is conducive to improving the stamping process. The rear door inner panel body structure 121 has high material utilization and good stamping process. like Figure 8As shown, the wiper reinforcement 122 is mainly a segmented part designed to address the stamping difficulties of the main structure of the tailgate inner panel, while also meeting lightweight design requirements and achieving better performance. The main structure has a three-step cross-section: one is the flanged surface 1221 on the wiper reinforcement 122, which is also the lower edge of the tailgate glass bonding and welded to the stop surface of the tailgate outer panel glass 19; the middle transition surface 1222. One is the wiper reinforcement lifting surface 1223, which improves the rigidity of the wiper mounting point and the performance of the tailgate. At the same time, multiple recessed platforms 1224 are designed below it and welded to the middle structure 112 of the tailgate outer panel 18. In conjunction with the process design of the tailgate inner panel panel structure 1212, the left end lifting surface 1225 and the right end lifting surface 1226 of the wiper reinforcement 122 overlap with the main body 121 of the tailgate inner panel, as well as the left tailgate support rod reinforcement 125 and the right tailgate support rod reinforcement 126. The left end lifting surface 1225 and the right end lifting surface 1226 of the wiper reinforcement 122 have a larger drawing height than the middle lifting surface, which is beneficial to the process cost allocation design of the segmented design between the main body 121 of the tailgate inner panel and the wiper reinforcement 122. At the same time, it controls the unfolded material size of the end section of the wiper reinforcement 122, which is beneficial to the lightweight design of the parts. like Figure 4 As shown, the left rear door hinge reinforcement 123 and the right rear door hinge reinforcement 124 are welded to the rear door inner panel body 121, mainly to meet the stiffness requirements of the rear door hinge mounting point and the overall bending and torsional stiffness of the rear door. The left rear door support rod reinforcement 125 and the right rear door support rod reinforcement 126 are welded to the rear door inner panel body 121, mainly to meet the stiffness requirements of the rear door support rod mounting point and the overall bending and torsional stiffness of the rear door. The left rear door hinge reinforcement 123, the right rear door hinge reinforcement 124, the left rear door support rod reinforcement 125, and the right rear door support rod reinforcement 126, together with the rear door inner panel body 121 and the rear door outer panel 11, form the rear door frame structure. Figure 9 As shown, the upper edges 1231 and 1241 of the left and right rear door hinge reinforcements are close to the width of the vehicle body, while the lower edges 1232 and 1242 of the left and right rear door hinge reinforcements are close to the height of the vehicle body; these are corner node structures on the tailgate frame. Figure 10As shown, the upper edge 1253 of the left rear tailgate support rod reinforcement and the upper edge 1263 of the right rear tailgate support rod reinforcement are close to the vehicle height direction, and the lower edge 1254 of the left rear tailgate support rod reinforcement and the upper edge 1264 of the right rear tailgate support rod reinforcement are close to the vehicle width direction, which is the lower corner node structure of the tailgate frame; the lower edge 1232 of the left rear tailgate hinge reinforcement and the lower edge 1242 of the right rear tailgate hinge reinforcement are welded to the upper edge 1253 of the left rear tailgate support rod reinforcement and the upper edge 1263 of the right rear tailgate support rod reinforcement respectively, and together with the main body 121 of the rear tailgate inner panel, the three parts are welded in three layers 137, which better achieves the overall bending and torsional stiffness of the rear tailgate frame; the wiper reinforcement 122 is compared with the left rear tailgate hinge reinforcement 123 and the right rear tailgate hinge reinforcement 124. The left and right rear door support rod reinforcements 125 and 126 have relatively weak functions and uneven material thickness. To improve performance, the left and right rear door support rod reinforcements 125 and 126 are divided into sections with the wiper reinforcement 122, including the lower corner node structure of the left and right rear door support rod reinforcements 125 and 126. The left and right rear door hinge reinforcements 123 and 124, as well as the left and right rear door support rod reinforcements 125 and 126, have similar structures and functions, and their division is calculated based on the total material utilization rate. Based on the overall performance improvement of the rear door frame, the overall structure of the rear door frame has been reasonably optimized in terms of structural block design and component thickness segmentation, which is conducive to lightweight design. Compared with the traditional V-beam structure, the main body 121 of the rear tailgate inner panel improves material utilization and reduces the need for supplementary use of other parts of the rear tailgate inner panel; Based on the exterior design features and the high performance requirements of large and medium-sized SUVs, this invention redesigns the connection relationship and structure of the rear tailgate welding assembly to meet process and performance requirements, while optimizing and improving the overall material utilization rate.

[0014] Example 2 This embodiment is an application of Embodiment 1, specifically an SUV that uses the aforementioned tailgate assembly.

[0015] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An SUV tailgate assembly, characterized in that, The assembly includes a rear tailgate outer panel (11) and a rear tailgate inner panel welding assembly (12); the rear tailgate outer panel (11) and the rear tailgate inner panel welding assembly (12) are edged and glued around the outer ring; the rear tailgate outer panel (11) and the rear tailgate inner panel welding assembly (12) are welded around the inner ring; there is at least one weld on each side of the middle structural surface of the rear tailgate outer ring; the shaping line (111) of the rear tailgate outer panel (11) is used to fix the spoiler decoration, the rear tailgate middle outer decoration, and the rear tailgate glass; the rear tailgate inner panel welding assembly (12) includes a wiper reinforcement (122) and the rear tailgate inner panel body. (121) Left rear door hinge reinforcement (123) Right rear door hinge reinforcement (124) Left rear door strut reinforcement (125) Right rear door strut reinforcement (126) and rear door lock reinforcement (127); The middle structure (112) of the outer panel of the rear door is welded to the wiper reinforcement (122) and the main body of the inner panel of the rear door (121); The inner panel of the rear door is formed by the inner panel of the rear door (121), the wiper reinforcement (122), and the partial structure of the left rear door strut reinforcement (1251) and the partial structure of the right rear door strut reinforcement (1261); The main body (121) of the inner panel of the rear door is divided into an inner upper frame (1211), an inner left frame (1213), an inner right frame (1214), and an inner panel structure (1212). The upper and lower sides of the upper frame (1211) are respectively the edge coating surface and the glass coating surface formed together with the outer panel of the rear door. The design of the upper and lower sides of the upper frame (1211) is based on the shape of the glass and the spoiler (3). The cross-sectional structure optimization of the inner left frame (1213) and the inner right frame (1214) affects the drawing depth of the stamping process, the black edge of the glass, and the bending and torsional stiffness of the rear door. The side frame cross section of the inner panel body (121) is composed of five stepped surfaces (2131), forming a "U" shaped opening structure; The inner panel structure (1212) is provided with a V-beam structure feature (2121); the V-beam structure feature (2121) extends further inward to form an inner panel structure surface (2122), and a through hole (2125) is opened on the inner panel structure surface (2122). At the same time, a lateral flange (2126) is made at the through hole and welded to the middle structure (112) of the outer panel of the back door. The upper end of the inner panel structure surface (2122) has a height difference with the wiper reinforcement. The inner panel structure surface (2122) is formed by the inner panel body (121) of the back door and then shaped to form a welding surface (2127) with the upper surface (1223) of the wiper reinforcement and welded to the upper surface (1223) of the wiper reinforcement.

2. The SUV tailgate assembly according to claim 1, characterized in that, The upper part of the V-beam structure feature (2121) is enclosed by the wiper reinforcement (122), the left rear door support rod reinforcement (125), and the right rear door support rod reinforcement (126). The wiper reinforcement (122), the left rear door support rod reinforcement (125), and the right rear door support rod reinforcement (126) form the lower edge of the rear door glass bonding. The wiper reinforcement (122), the left rear door support rod reinforcement (125), and the right rear door support rod reinforcement (126) form the lower edge of the rear door glass bonding and are welded to the edge of the glass stop of the rear door outer panel. The upper left flange (2123) and the upper right flange (2124) of the V-beam structure feature (2121) overlap the upper left raised surface (12) of the wiper reinforcement (122) respectively. 25) and the upper right lifting surface (1226) and the upper left rear door support rod reinforcement surface (1252) and the upper right rear door support rod reinforcement surface (1262) form the welding of the rear door inner panel body (121) with the left rear door support rod reinforcement (125) and the right rear door support rod reinforcement (126), the rear door inner panel body (121) and the wiper reinforcement (122) form two welds, the rear door inner panel body (121) and the wiper reinforcement (122) and the left rear door support rod reinforcement (125) and the right rear door support rod reinforcement (126) achieve three layers and two welds, the V-beam structure feature (2121) left upper side flange (2123) and right upper side flange (2124) avoid extending to the lower edge of the glass bonding.

3. The SUV tailgate assembly according to claim 1, characterized in that, The wiper reinforcement (122) has multiple recessed platforms (1224) on its lower side, which are welded to the middle structure (112) of the outer panel of the tailgate. In conjunction with the process design of the inner panel structure (1212) of the tailgate, the upper left raised surface (1225) and the upper right raised surface (1226) of the wiper reinforcement (122) overlap with the main body (121) of the inner panel of the tailgate, as well as the left tailgate support rod reinforcement (125) and the right tailgate support rod reinforcement (126).

4. The SUV tailgate assembly according to claim 1, characterized in that, The rear tailgate inner panel welding assembly (12) also includes a left rear tailgate hinge reinforcement (123) and a right rear tailgate hinge reinforcement (124). The left rear tailgate hinge reinforcement (123), the right rear tailgate hinge reinforcement (124), the left rear tailgate strut reinforcement (125), and the right rear tailgate strut reinforcement (126) together with the rear tailgate inner panel body (121) and the rear tailgate outer panel (11) form a tailgate frame structure. The left rear door hinge reinforcement (123) and the right rear door hinge reinforcement (124) are welded to the main body of the rear door inner panel (121). Their main functions are to meet the stiffness of the rear door hinge mounting point and the overall bending and torsional stiffness of the rear door. The left rear door strut reinforcement (125) and the right rear door strut reinforcement (126) are welded to the main body of the rear door inner panel (121). Their main functions are to meet the stiffness of the rear door strut mounting point and the overall bending and torsional stiffness of the rear door.

5. The SUV tailgate assembly according to claim 3, characterized in that: The upper edge (1231) of the left rear door hinge reinforcement and the upper edge (1241) of the right rear door hinge reinforcement are close to the width direction of the vehicle body, and the lower edge (1232) of the left rear door hinge reinforcement and the lower edge (1242) of the right rear door hinge reinforcement are close to the height direction of the vehicle body. The left rear door hinge reinforcement (123) and the right rear door hinge reinforcement (124) present the upper corner node structure of the rear door frame. The upper edge (1253) of the left rear door strut reinforcement and the upper edge (1263) of the right rear door strut reinforcement are close to the height direction of the vehicle body, and the lower edge (1254) of the left rear door strut reinforcement and the lower edge (1264) of the right rear door strut reinforcement are close to the width direction of the vehicle body. The left rear door strut reinforcement (125) and the right rear door strut reinforcement (126) present the lower corner node structure of the rear door frame.

6. The SUV tailgate assembly according to claim 5, characterized in that: The lower edge (1232) of the left rear door hinge reinforcement and the lower edge (1242) of the right rear door hinge reinforcement are welded to the left rear door support rod reinforcement part structure (1251) and the upper edge (1263) of the right rear door support rod reinforcement, respectively, and together with the rear door inner panel body (121), the three parts are welded in three layers.

7. An SUV, characterized in that, Includes the SUV tailgate assembly as described in any one of claims 1 to 6.

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