Back door structure and vehicle

Abstract

The utility model relates to the technical field of vehicle structures, in particular to a back door structure and a vehicle, the back door structure comprises a back door outer plate assembly and a back door inner plate assembly, the back door outer plate assembly is fixedly connected with the back door inner plate assembly, the back door outer plate assembly comprises a back door outer plate upper plate and a back door outer plate lower plate, and the back door outer plate upper plate is fixedly connected with the back door inner plate assembly. A decorative model is integrally formed on the back door outer plate upper plate, and the back door outer plate lower plate is in lap joint with the inner side of the back door outer plate upper plate. The metal plate back door aims to form the streamline metal plate back door with large inclination, large size and large X-direction depth in the mode that the back door outer plate and the back door inner plate are partitioned in advance and connected and formed in the later period, and on the premise that the performance of the back door is kept and the modeling requirement is met, the difficulty of forming the integrated outer plate and inner plate is reduced; meanwhile, the number of large molds is reduced, the mold tonnage is reduced, and the manufacturing and production cost of the whole vehicle is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle structures, in particular to a rear door structure and a vehicle. Background Art

[0002] Currently, most SUVs on the market use an integrated through-light and a large-sized outer decorative part on the rear door, resulting in a relatively deep overall X-direction depth of the rear door. Moreover, there are more and more cross-shaped vehicles in the current market. Cross-shaped vehicles adopt the shape of a three-box car, have the trunk space of a two-box car, and the cool integrated through-light and electric tailgate shape are favored by many young users. The rear door of a cross-shaped vehicle has a large slope and a long size to form a streamlined shape, making the vehicle shape more impactful and the rear part of the vehicle as a whole in a streamlined shape. Compared with traditional vehicles, the upper end of the rear door of a cross-shaped vehicle is more forward, the slope of the rear door is larger, and the arc is more rounded to achieve the streamlined shape.

[0003] However, the existing integrated sheet metal rear door structure cannot adapt to the shape with a large X-direction forming depth and a long overall size. Moreover, with the increasingly severe price war in the current automotive market, a rear door structure with cost-effective advantages and meeting the needs of current mainstream shapes is required. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a rear door structure and a vehicle. By pre-dividing the outer panel and the inner panel of the rear door and connecting and forming them later, a streamlined, large-slope, large-size, and large X-direction depth sheet metal rear door is formed. On the premise of maintaining the performance of the rear door and meeting the shape requirements, the difficulty of forming the integrated outer panel and inner panel is reduced, and at the same time, the number of large molds is reduced, the mold tonnage is reduced, and the manufacturing and production costs of the whole vehicle are effectively reduced.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] A rear door structure includes an outer panel assembly of the rear door and an inner panel assembly of the rear door. The outer panel assembly of the rear door and the inner panel assembly of the rear door are fixedly connected. The outer panel assembly of the rear door includes an upper plate of the outer panel of the rear door and a lower plate of the outer panel of the rear door. The upper plate of the outer panel of the rear door is integrally formed with a decorative shape, and the lower plate of the outer panel of the rear door is lapped on the inner side of the upper plate of the outer panel of the rear door.

[0007] According to the above technical means, by dividing the outer panel of the rear door into two sections, compared with the 5 to 6 processes of the integral outer panel of the rear door, the number of processes of the segmented structure is controlled within 4 processes, and the die tonnage is also correspondingly reduced, greatly reducing the investment in die costs. Moreover, stamping is carried out in a common die form, greatly reducing the difficulty of forming without increasing the size of the integral outer panel die. In addition, by replacing the traditional plastic decorative parts with a sheet metal styling form, the styling cost is greatly reduced without affecting the appearance styling.

[0008] Further, the upper plate of the outer panel of the rear door has a spoiler mounting hole, a side spoiler decorative part mounting hole, a rear windshield mounting hole, and a first positioning hole. The spoiler mounting hole is arranged at the top of the upper plate of the outer panel of the rear door, and the side spoiler decorative part mounting hole, the rear windshield mounting hole, and the first positioning hole are all arranged on both sides of the upper plate of the outer panel of the rear door.

[0009] According to the above technical means, the positioning, installation, and disassembly of the spoiler, the spoiler decorative part, and the rear windshield can be effectively realized.

[0010] Further, the lower plate of the outer panel of the rear door has a first through taillight mounting hole, a license plate decorative part mounting hole, and a second positioning hole. The first through taillight mounting hole, the license plate decorative part mounting hole, and the second positioning hole are all arranged at the top of the lower plate of the outer panel of the rear door.

[0011] According to the above technical means, the positioning, installation, and disassembly of the through taillight and the license plate decorative part can be effectively realized, and it is also beneficial to the positioning and assembly of the upper plate and the lower plate of the outer panel of the rear door.

[0012] Further, the upper plate of the outer panel of the rear door has a first anti-wrinkle rib and a first welding surface. The first welding surface is located below the first anti-wrinkle rib, and the first welding surface is convex.

[0013] According to the above technical means, through the first anti-wrinkle rib, problems such as wrinkling and springback caused by incomplete forming during the stamping and forming process of the upper plate of the outer panel of the rear door can be effectively solved, and at the same time, it also plays a certain strengthening role for the first welding surface of the upper plate of the outer panel of the rear door.

[0014] Further, the lower plate of the outer panel of the rear door has a second anti-wrinkle rib, a welding edge, and a reinforcing boss. The welding edge is located above the second anti-wrinkle rib, and the reinforcing bosses are symmetrically arranged at the top of the lower plate of the outer panel of the rear door.

[0015] According to the above technical means, through the second anti-wrinkle rib, problems such as wrinkling and springback caused by incomplete forming during the stamping and forming process of the lower plate of the outer panel of the rear door can be effectively solved, and at the same time, it also plays a certain strengthening role for the welding edge of the lower plate of the outer panel of the rear door. And through the reinforcing bosses, the structural strength of the lower plate of the outer panel of the rear door can be further strengthened;

[0016] Moreover, the convex first welding surface cooperates with the welding edge, more intuitively highlighting the solder joint positions between the upper panel and the lower panel of the rear door outer panel, facilitating positioning welding and identification of welding omission.

[0017] Furthermore, the rear door inner panel assembly includes a rear door inner panel, hinge nut plates, a first reinforcement assembly, and a second reinforcement assembly. The hinge nut plates are symmetrically arranged at the top of the rear door inner panel. The first reinforcement assembly is fixedly arranged on the periphery of the rear door inner panel. The second reinforcement assembly is fixedly arranged in the middle and on both sides of the middle of the rear door inner panel.

[0018] According to the above technical means, by dividing the rear door inner panel assembly into an inner panel and local reinforcement parts, each component meets the shaping and forming requirements of each part. On the premise of maintaining the performance of the rear door and meeting the shaping requirements, the difficulty of forming the integral outer panel and inner panel is reduced.

[0019] Furthermore, the first reinforcement assembly includes hinge reinforcement parts, stay bar reinforcement parts, rear door middle reinforcement parts, and inner handle reinforcement parts. The hinge reinforcement parts are arranged on both sides of the top of the rear door inner panel. The stay bar reinforcement parts are arranged on both sides of the rear door inner panel. The rear door middle reinforcement parts are arranged in the middle of the bottom side of the rear door inner panel. The inner handle reinforcement parts are arranged on one side of the rear door middle reinforcement parts.

[0020] According to the above technical means, through the settings of the hinge reinforcement parts, stay bar reinforcement parts, rear door middle reinforcement parts, and inner handle reinforcement parts, the stiffness of the through lamp, the lower part of the rear door window frame, the hinge, the lower installation point of the stay bar, and the inner handle can be improved, thereby enhancing the structural strength of the rear door inner panel.

[0021] Furthermore, the second reinforcement assembly includes a wiper reinforcement part and an inner panel reinforcement part. The wiper reinforcement part is arranged in the middle of the rear door inner panel and is fixedly connected to the first reinforcement assembly. The inner panel reinforcement part is arranged on both sides of the rear door inner panel and is fixedly connected to the first reinforcement assembly.

[0022] According to the above technical means, by pre-separating the wiper reinforcement part and the inner panel reinforcement part, compared with the situation of a large number of molds and large tonnage for the integral rear door inner panel forming molds, the number of molds for this type of rear door inner panel is controlled within four processes. Due to the early separation, the difficult parts of forming are avoided in advance, the tonnage of the mold is reduced, and the investment in mold costs is decreased, but the problem of difficult stamping forming of the integral sheet metal inner panel is avoided.

[0023] Furthermore, the stay bar reinforcement parts, rear door middle reinforcement parts, and wiper reinforcement part form a "T" - shaped reinforcement structure for overall reinforcement of the middle and lower regions of the rear door structure.

[0024] According to the above technical means, by forming a T-shaped reinforcement structure to integrally reinforce the middle and lower regions of the rear door, the stiffness of the mounting points of components such as the through-light, rear wiper, license plate trim, and license plate is greatly improved. Moreover, since the plastic trim above the through-light is cancelled, the through-light is subjected to gap and flushness matching with the outer panel assembly of the sheet metal rear door with better structural stability, and the accuracy is better guaranteed and the consistency is better.

[0025] Further, the inner panel of the rear door is provided with exhaust holes and liquid leakage holes. The exhaust holes are arranged at the top of the inner panel of the rear door, and the liquid leakage holes are arranged at the bottom of the inner panel of the rear door.

[0026] According to the above technical means, by providing exhaust holes, it is possible to avoid the phenomenon of poor cavity electrophoresis in the caulking and hemming area caused by gas accumulation during the painting process; by providing liquid leakage holes, it is possible to timely discharge the electrophoresis liquid and other liquids in the caulking and hemming area during the electrophoresis process of the inner panel of the rear door, avoiding water retention.

[0027] This application also discloses a vehicle, including a vehicle body and the rear door structure described above.

[0028] According to the above technical means, by adopting the above rear door structure on the vehicle, the overall structural stiffness and NVH performance of the vehicle can be effectively improved, and the problem of large X-direction forming depth and weak structural strength of the rear door caused by the through-light is greatly optimized.

[0029] The application adopting the above scheme has the following beneficial effects:

[0030] 1. By dividing the rear door structure into an outer panel and an inner panel of the rear door, and then pre-blocking the outer panel and the inner panel of the rear door and connecting and forming them later, a sheet metal rear door with a streamline shape, large slope, large size, and large X-direction depth is formed. On the premise of maintaining the performance of the rear door and meeting the styling requirements, the difficulty of forming the integral outer panel and inner panel is reduced. At the same time, the number of large molds is reduced, the mold tonnage is reduced, and the manufacturing and production costs of the whole vehicle are effectively reduced;

[0031] 2. In this application, the outer panel of the rear door is divided into two sections. Compared with 5 to 6 processes for the mold of the integral outer panel of the rear door, the number of processes for the segmented structure mold is controlled within 4 processes, and the mold tonnage is also correspondingly reduced, greatly reducing the investment in mold costs. Moreover, stamping is carried out in a common mold form, and the difficulty of forming is greatly reduced without increasing the size of the mold for the relative integral outer panel. And by replacing the traditional plastic trim with a sheet metal styling form, the styling cost is greatly reduced without affecting the appearance styling;

[0032] 3. In this application, the inner panel assembly of the rear door is divided into multiple reinforcement parts, and the wiper reinforcement part and the inner panel reinforcement part are pre-segmented. Compared with the situation of a large number of molds and large tonnage for the integral inner panel forming molds of the rear door, the number of molds for this form of the inner panel of the rear door is controlled within four processes. Due to the early segmentation, the difficult parts of forming are avoided in advance, the tonnage of the mold is reduced, and the investment in mold costs is lowered. Moreover, the problem of difficult stamping forming of the integral sheet metal inner panel is avoided.

[0033] 4. In this application, by forming a "T" - shaped reinforcement structure with the strut reinforcement part, the middle reinforcement part of the rear door, and the wiper reinforcement part, the middle and lower regions of the rear door are integrally strengthened, greatly improving the stiffness of the mounting points of components such as the through - light, rear wiper, license plate trim, and license plate. Also, since the plastic trim above the through - light is cancelled, the through - light is matched with the sheet metal outer panel assembly of the rear door with better structural stability in terms of gap and surface difference, and better accuracy and consistency can be ensured. Brief Description of the Drawings

[0034] The present utility model can be further illustrated by the non - restrictive embodiments given in the drawings;

[0035] Figure 1 It is a schematic structural diagram of the rear door structure in the embodiment of this application;

[0036] Figure 2 It is a schematic structural diagram of the outer panel assembly of the rear door in the embodiment of this application;

[0037] Figure 3 It is a schematic structural diagram of the upper plate and the lower plate of the outer panel of the rear door in the embodiment of this application;

[0038] Figure 4 It is a schematic structural diagram of the upper plate of the outer panel of the rear door in the embodiment of this application;

[0039] Figure 5 It is one of the schematic structural diagrams of the lower plate of the outer panel of the rear door in the embodiment of this application;

[0040] Figure 6 It is the other schematic structural diagram of the lower plate of the outer panel of the rear door in the embodiment of this application;

[0041] Figure 7 It is a schematic front - view structural diagram of the inner panel assembly of the rear door in the embodiment of this application;

[0042] Figure 8 It is a schematic rear - view structural diagram of the inner panel assembly of the rear door in the embodiment of this application;

[0043] Figure 9 It is a schematic structural diagram of the inner panel of the rear door in the embodiment of this application;

[0044] Figure 10It is a schematic structural diagram of the inner panel reinforcement in the embodiment of the present application;

[0045] Figure 11 It is one of the schematic B-B sectional structural diagrams of the rear door structure in the embodiment of the present application;

[0046] Figure 12 It is the second of the schematic B-B sectional structural diagrams of the rear door structure in the embodiment of the present application;

[0047] Figure 13 It is the third of the schematic B-B sectional structural diagrams of the rear door structure in the embodiment of the present application;

[0048] Figure 14 It is a schematic diagram of a partial matching structure of the rear door structure during assembly in the embodiment of the present application;

[0049] Main symbol element description:

[0050] 1. Rear door outer panel assembly; 11. Upper panel of the rear door outer panel; 111. Window frame of the rear door outer panel; 112. Spoiler mounting hole; 113. Side trim mounting hole of the spoiler; 115. Rear windshield mounting hole; 116. First positioning hole; 117. First wrinkle-absorbing rib; 118. First welding surface; 119. Decorative profile;

[0051] 12. Lower panel of the rear door outer panel; 121. Welding edge; 122. First through taillight mounting hole; 123. License plate trim mounting hole; 124. License plate mounting hole; 125. License plate reinforcing rib; 126. Second wrinkle-absorbing rib; 127. Wiring harness sheath through hole; 128. Reinforcing boss; 129. First through lamp mounting surface; 1210. Second positioning hole;

[0052] 2. Rear door inner panel assembly; 21. Rear door inner panel; 211. First support foot; 212. Leakage hole; 213. Lower buffer pad mounting hole; 214. License plate trim mounting through hole; 215. Rear door limiter mounting hole; 216. Strut lower bracket mounting hole; 217. Side trim mounting through hole of the spoiler; 218. Rear door hinge mounting hole; 219. Exhaust hole; 2110. Second through lamp mounting surface; 2111. Inner panel reinforcement matching surface; 2112. Third wrinkle-absorbing rib; 2113. Rear door inner panel positioning hole;

[0053] 22. Hinge nut plate; 23. Hinge reinforcement; 231. First flanging; 24. Strut reinforcement; 241. Second flanging; 25. Inner panel reinforcement; 26. Wiper reinforcement; 261. Wiper mounting hole; 262. Third through lamp mounting surface; 27. Rear door middle reinforcement; 271. Glue application groove; 272. Second support foot; 28. Handle reinforcement;

[0054] 3. Lower bracket of the support rod; 4. Upper buffer pad; 5. Buffer pad support; 6. Rear door stopper; 7. Lower buffer pad. Specific embodiments

[0055] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can understand the advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that the diagrams provided in the following embodiments are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation on the present invention. To better illustrate the embodiments of the present invention, some components in the diagrams will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the diagrams may be omitted.

[0056] In the diagrams of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the diagrams. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the diagrams are only for illustrative purposes and should not be construed as a limitation on the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. And in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0057] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape and size of the components in actual implementation. The types, quantities and proportions of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0058] As Figures 1-14 shown, the embodiments of the present application disclose a rear door structure, including a rear door outer panel assembly 1 and a rear door inner panel assembly 2. The rear door outer panel assembly 1 is fixedly connected to the rear door inner panel assembly 2 to form a rear door structure.

[0059] In some alternative embodiments, such as Figures 1-3As shown in the figure, the outer panel assembly 1 of the rear door includes the upper panel 11 of the outer panel of the rear door and the lower panel 12 of the outer panel of the rear door. The lower panel 12 of the outer panel of the rear door is lapped inside the upper panel 11 of the outer panel of the rear door, forming an "upper wrapping lower" lapping form to avoid water leakage problems. The upper panel 11 of the outer panel of the rear door is integrally formed with a decorative shape 119, which replaces the traditional plastic decorative parts through the sheet metal shaping form, greatly reducing the shaping cost and having no impact on the appearance shape.

[0060] In this embodiment, as Figure 2 shown, the upper panel 11 of the outer panel of the rear door is L-shaped, and has a spoiler mounting hole 112, a spoiler side decorative part mounting hole 113, a rear windshield mounting hole 115 and a first positioning hole 116 formed by stamping. There are multiple spoiler mounting holes 112, which are arranged at the top of the upper panel 11 of the outer panel of the rear door and are used to fixedly install the spoiler by means of bolts, screws, etc. There are multiple spoiler side decorative part mounting holes 113, which are respectively arranged on the left and right sides of the upper panel 11 of the outer panel of the rear door and are located at the outermost sides of the left and right sides of the upper panel 11 of the outer panel of the rear door, and are used to fixedly install the spoiler side decorative part by means of bolts, screws, etc. The rear windshield mounting hole 115 is arranged in the middle of the upper panel 11 of the outer panel of the rear door and is used to fixedly install the rear windshield. The first positioning hole 116 is arranged below the rear windshield mounting hole 115 on the upper panel 11 of the outer panel of the rear door and is used to cooperate with the lower panel 12 of the outer panel of the rear door to form an "upper wrapping lower" lapping form. In the actual production process, when installing the spoiler, the spoiler side decorative part and the rear windshield, appropriate methods such as FDS, spot welding, structural adhesive, etc. can also be selected.

[0061] In this embodiment, the decorative shape 119 is located outside the bottom of the rear windshield mounting hole 115 and is integrally formed with the upper panel 11 of the outer panel of the rear door by stamping, which can replace the traditional plastic decorative parts, greatly reducing the shaping cost and having no impact on the appearance shape.

[0062] In this embodiment, as Figure 5 shown, the upper panel 11 of the outer panel of the rear door is integrally stamped with a first wrinkle-absorbing rib 117 and a first welding surface 118. The first wrinkle-absorbing rib 117 is in a continuous winding shape. Through the setting of the first wrinkle-absorbing rib 117, problems such as wrinkling and springback caused by incomplete forming during the stamping process of the upper panel 11 of the outer panel of the rear door can be effectively solved, and at the same time, it also plays a certain strengthening role for the first welding surface 118 of the upper panel 11 of the outer panel of the rear door. The first welding surface 118 is located below the first wrinkle-absorbing rib 117 and is convex, which is convenient for connecting with the lower panel 12 of the outer panel of the rear door.

[0063] As Figure 6As shown, the lower plate 12 of the rear door outer panel has a second wrinkle-absorbing rib 126, a welding edge 121, and a reinforcing boss 128. In this embodiment, the second wrinkle-absorbing rib 126, the welding edge 121, and the reinforcing boss 128 are integrally formed by stamping on the lower plate 12 of the rear door outer panel. By providing the second wrinkle-absorbing rib 126, problems such as wrinkling and springback caused by incomplete forming during the stamping process of the lower plate 12 of the rear door outer panel can be effectively solved, and at the same time, it also plays a certain strengthening role for the lower plate 12 of the rear door outer panel and the reinforcing boss 128. The welding edge 121 is located above the second wrinkle-absorbing rib 126, so that when connected to the first welding surface 118, the solder joint positions of the upper plate 11 and the lower plate 12 of the rear door outer panel are more intuitively highlighted, facilitating positioning welding and identification of missed welding. The reinforcing bosses 128 are symmetrically arranged at the top of the lower plate 12 of the rear door outer panel to strengthen the structural strength of the lower plate 12 of the rear door outer panel.

[0064] In this embodiment, as Figure 6 shown, a first through-type taillight mounting hole 122, a license plate trim mounting hole 123, and a second positioning hole 1210 are integrally formed by stamping on the lower plate 12 of the rear door outer panel. At the same time, a license plate mounting hole 124, a license plate reinforcing rib 125, a wire harness sheath through-hole 127, and a first through-type lamp mounting surface 129 are also formed by stamping. A plurality of first through-type taillight mounting holes 122 are provided, preferably 11, and are arranged on both sides of the top of the lower plate 12 of the rear door outer panel. The number of the first through-type lamp mounting surfaces 129 corresponds to or is less than the number of the first through-type taillight mounting holes 122 and is located outside the first through-type taillight mounting holes 122. A plurality of license plate trim mounting holes 123 are provided and are arranged on the left and right sides of the lower plate 12 of the rear door outer panel. A plurality of second positioning holes 1210 are provided, preferably 3, and are arranged on the left, middle, and right sides of the lower plate 12 of the rear door outer panel. The second positioning holes 1210 correspond to the first positioning holes 116, and then are fixedly connected by means of bolts or the like to fixedly connect the upper plate 11 and the lower plate 12 of the rear door outer panel to form the rear door outer panel assembly 1.

[0065] A plurality of license plate mounting holes 124 are provided and are arranged on both sides of the middle of the lower plate 12 of the rear door outer panel. A plurality of license plate reinforcing ribs 125 are provided and are arranged in the middle and on the left and right sides of the license plate mounting holes 124 to strengthen the structural strength of the license plate mounting area. A plurality of wire harness sheath through-holes 127 are provided and are arranged on the upper part of the lower plate 12 of the rear door outer panel.

[0066] In this embodiment, the upper panel 11 and the lower panel 12 of the outer panel of the rear door are both sheet metal structures and are stamped in a common mold form. Without increasing the size of the relatively integrated outer panel mold, the difficulty of forming is greatly reduced. Moreover, the sheet metal assembly of the outer panel of the rear door 1 can be electrophoresed together with the whole vehicle, and the appearance color always remains consistent with that of the whole vehicle. Compared with the separate electrophoresis of plastic decorative parts, the problem of color difference of the actual vehicle in the later stage is avoided. At the same time, the problem of thermal expansion and contraction of the sheet metal outer panel of the rear door is smaller than that of plastic decorative parts and can be almost ignored, avoiding the problem of poor matching of the gap and surface difference between the plastic decorative parts and the sheet metal in the later stage, reducing the later rectification work and saving labor input.

[0067] In some alternative embodiments, such as Figures 7-14 As shown, the inner panel assembly 2 of the rear door includes an inner panel 21 of the rear door, a hinge nut plate 22, a first strengthening component and a second strengthening component. The hinge nut plates 22 are symmetrically arranged at the top of the inner panel 21 of the rear door for assembling the hinges. The first strengthening component is fixedly arranged on the periphery of the inner panel 21 of the rear door to strengthen the peripheral strength of the inner panel 21 of the rear door. The second strengthening component is fixedly arranged in the middle and on both sides of the middle of the inner panel 21 of the rear door to strengthen the structural strength of the middle of the inner panel 21 of the rear door and the strength on both sides of the middle.

[0068] By dividing the inner panel assembly 2 of the rear door into an inner panel and local strengthening parts, each component meets the shaping and forming requirements of each part. On the premise of maintaining the performance of the rear door and meeting the shaping requirements, the difficulty of forming the integrated outer panel and inner panel is reduced. Compared with the situation where the number of molds for forming the integral inner panel of the rear door is large and the tonnage is large, the number of molds for this type of inner panel of the rear door is controlled within four processes. Due to the early division, the difficult parts of forming are avoided in advance, the tonnage of the mold is reduced, the investment in mold costs is reduced, and the problem of difficult stamping forming of the integral sheet metal inner panel is also avoided.

[0069] In some embodiments, such as Figure 7 As shown, the first strengthening component includes a hinge strengthening part 23, a strut strengthening part 24, a middle part strengthening part 27 of the rear door and an inner handle strengthening part 28. The hinge strengthening part 23 is arranged on both sides of the top of the inner panel 21 of the rear door by welding to strengthen the installation strength of the hinge on the inner panel 21 of the rear door. The strut strengthening part 24 is arranged on both sides of the inner panel 21 of the rear door by welding to strengthen the installation strength of the strut on the inner panel 21 of the rear door. The middle part strengthening part 27 of the rear door is arranged in the middle of the bottom side of the inner panel 21 of the rear door by welding to strengthen the structural strength of the middle of the bottom side of the inner panel 21 of the rear door, facilitating the installation of the lock. The inner handle strengthening part 28 is arranged on one side of the middle part strengthening part 27 of the rear door by welding to strengthen the installation strength of the inner handle on the inner panel 21 of the rear door.

[0070] In some embodiments, such as Figure 7As shown, the second reinforcement component includes a wiper reinforcement 26 and an inner panel reinforcement 25. The wiper reinforcement 26 is arranged in the middle of the inner panel 21 of the rear door and is fixedly connected to the strut reinforcement 24 and the middle reinforcement 27 of the rear door. The inner panel reinforcement 25 is arranged on both sides of the inner panel 21 of the rear door and is fixedly connected to the first reinforcement component.

[0071] By pre-segmenting the wiper reinforcement 26 and the inner panel reinforcement 25, compared with the situation of a large number of molds and large tonnage for the integral inner panel of the rear door, the number of molds for this form of the inner panel of the rear door is controlled within four processes. Due to the early segmentation, the difficult parts of forming are avoided in advance, the tonnage of the mold is reduced, and the investment in mold costs is lowered, but the problem of difficult stamping forming of the integral sheet metal inner panel is avoided.

[0072] In this embodiment, the inner panel 21 of the rear door has a second through lamp mounting surface 2110, and the wiper reinforcement 26 has a third through lamp mounting surface 262, which is used to enable the through tail lamp to pass through the outer panel assembly 1 of the rear door and the inner panel 21 of the rear door. The wiper reinforcement 26 also has a wiper mounting hole 261 for mounting the wiper. The inner panel 21 of the rear door also has a license plate trim mounting through hole 214 corresponding to the license plate trim mounting hole 123 for fixedly mounting the license plate trim. The inner panel 21 of the rear door also has a spoiler side trim mounting through hole 217 corresponding to the spoiler side trim mounting hole 113 for mounting the spoiler side trim. The inner panel 21 of the rear door is also symmetrically provided with inner panel positioning holes 2113 of the rear door for positioning and assembling with the outer panel assembly 1 of the rear door.

[0073] In this embodiment, as Figure 9 shown, the inner panel 21 of the rear door is provided with rear door hinge mounting holes 218 at the positions of the hinge nut plates 22 for mounting the rear door hinge. The inner panel 21 of the rear door is provided with a plane above the hinge reinforcement 23. The hinge reinforcement 23 is set as a sheet metal part, and the hinge reinforcement 23 has a first flanging 231, and the first flanging 231 is spot welded to the plane to further improve the stiffness at the rear door hinge. The top of the inner panel 21 of the rear door has a plurality of third anti-wrinkle ribs 2112 for strengthening the top strength of the inner panel 21 of the rear door.

[0074] The inner panel 21 of the rear door is provided with a plurality of spoiler mounting through holes, which are distributed on the left and right sides to facilitate the installation of the spoiler.

[0075] The inner panel 21 of the rear door is provided with a plurality of lower strut bracket mounting holes 216, which are distributed on the left and right sides for mounting the lower strut bracket 3. An upper buffer pad 4 is fixedly mounted on the lower strut bracket 3, and a buffer pad support 5 is fixedly connected to the upper buffer pad 4, which is used to make flexible contact with the vehicle body when the rear door structure is closed, so as to improve the stability and NVH performance of the rear door system.

[0076] The stay reinforcement 24 is provided as a sheet metal part, and the second flanging 241 is provided on the stay reinforcement 24, and the number of the second flangings 241 is set to 2. A plurality of second through taillight mounting holes are provided on the inner panel 21 of the rear door for the through mounting of the through taillight; an inner panel reinforcement matching surface 2111 is provided on the inner panel 21 of the rear door at the inner panel reinforcement 25. The inner panel reinforcement 25 is provided as a sheet metal part and has a third flanging. The second flanging 241, the second through lamp mounting surface 2110 and the third flanging are connected by spot welding, which can improve the stiffness at the through lamp and the lower mounting point of the stay.

[0077] The inner panel 21 of the rear door also has a rear door limiter mounting hole 215 and a lower buffer pad mounting hole 213. The rear door limiter mounting hole 215 is used for mounting the rear door limiter 6; the lower buffer pad mounting hole 213 is used for mounting the lower buffer pad 7, which cooperates with the upper buffer pad support 5 to further improve the flexible contact.

[0078] In this embodiment, as Figure 9 shown, the inner panel 21 of the rear door has an exhaust hole 219 and a liquid leakage hole 212. The exhaust hole 219 is provided at the top of the inner panel 21 of the rear door. By providing the exhaust hole 219, it is possible to avoid the phenomenon of poor cavity electrophoresis in the caulking and hemming area due to gas accumulation during the painting process. The liquid leakage hole 212 is provided at the bottom of the inner panel 21 of the rear door. The number of the liquid leakage holes 212 is preferably 3 and they are arranged at intervals, which is used to timely discharge the electrophoresis liquid and other liquids in the caulking and hemming area of the inner panel 21 of the rear door during the electrophoresis process to avoid water retention.

[0079] In this embodiment, the stay reinforcement 24, the middle rear door reinforcement 27 and the wiper reinforcement 26 form a "T" - shaped reinforcement structure for overall strengthening of the middle and lower regions of the rear door structure. By forming the "T" - shaped reinforcement structure, the middle and lower regions of the rear door are overall strengthened, greatly improving the stiffness of the mounting points of components such as the through lamp, the rear wiper, the license plate trim, and the license plate. And since the plastic trim above the through lamp is cancelled, the through lamp is matched with the sheet metal rear door outer panel assembly 1 with better structural stability in terms of gap and flushness, and the accuracy is better guaranteed and the consistency is better.

[0080] In this embodiment, the stay reinforcement 24 also has a second welding surface, the wiper reinforcement 26 has a third welding surface and a fourth welding surface. The second welding surface and the third welding surface are connected to the lower side surface of the rear door outer panel window frame 111 by spot welding, which can improve the strength of the lower region of the rear door outer panel window frame 111. The middle rear door reinforcement 27 has 2 symmetrical fifth welding surfaces. The fourth welding surface and the fifth welding surfaces are respectively welded to both sides of the top middle part of the rear door outer panel lower plate 12, which can strengthen the structural strength of the through lamp and the wiper mounting area.

[0081] In this embodiment, the inner panel of the rear door has 4 first support feet 211 symmetrically arranged, 2 of the first support feet 211 are spot-welded to the reinforcing boss 128, and the other 2 first support feet 211 are spot-welded to the middle reinforcement 27 of the rear door, which can improve the connection strength between the inner panel 21 of the rear door and the outer panel assembly 1 of the rear door.

[0082] In this embodiment, the middle reinforcement 27 of the rear door further has a second support foot 272, and the second support foot 272 is spot-welded to the connection point in the lower panel 12 of the outer panel of the rear door, which is used to strengthen the connection strength between the middle part of the inner panel of the rear door and the outer panel assembly 1 of the rear door. The middle reinforcement 27 of the rear door further has a plurality of glue application grooves 271, preferably 4. The 4 glue application grooves 271 are respectively connected to the lower panel 12 of the outer panel of the rear door through expansion glue, further providing strong support for the lower region of the rear door structure, thereby greatly improving the structural strength of this region.

[0083] In this embodiment, the middle reinforcement 27 of the rear door, the inner handle reinforcement 28, and the wiper reinforcement 26 are all sheet metal parts formed by integral stamping.

[0084] The embodiment of the present application also discloses a vehicle, including a vehicle body and the rear door structure of the above embodiment.

[0085] By adopting the above rear door structure on the vehicle, the overall structural stiffness and NVH performance of the vehicle can be effectively improved, and the problem of large X-direction forming depth and weak structural strength of the rear door caused by the through lamp is greatly optimized.

[0086] The above provides a detailed introduction to a rear door structure and a vehicle provided by the present application. The description of specific embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0087] It should be noted that the phrases such as "an embodiment", "embodiment", "some optional embodiments", "exemplary embodiments", "some embodiments" mentioned in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily each embodiment includes the specific feature, structure or characteristic. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when combining an embodiment to describe a specific feature, structure or characteristic, it is within the knowledge scope of those skilled in the art to implement such a feature, structure or characteristic in combination with other embodiments, whether explicitly or implicitly described.

[0088] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. A rear door structure, characterized in that: It includes an outer back door panel assembly (1) and an inner back door panel assembly (2). The outer back door panel assembly (1) and the inner back door panel assembly (2) are fixedly connected. The outer back door panel assembly (1) includes an upper outer back door panel (11) and a lower outer back door panel (12). The upper outer back door panel (11) is integrally formed with a decorative shape (119). The lower outer back door panel (12) is lapped on the inner side of the upper outer back door panel (11).

2. The back door structure according to claim 1, wherein: The upper outer back door panel (11) has a spoiler mounting hole (112), a spoiler side trim mounting hole (113), a rear windshield mounting hole (115), and a first positioning hole (116). The spoiler mounting hole (112) is arranged at the top of the upper outer back door panel (11). The spoiler side trim mounting hole (113), the rear windshield mounting hole (115), and the first positioning hole (116) are all arranged on both sides of the upper outer back door panel (11).

3. The back door structure according to claim 1, characterized in that: The lower outer back door panel (12) has a first through taillight mounting hole (122), a license plate trim mounting hole (123), and a second positioning hole (1210). The first through taillight mounting hole (122), the license plate trim mounting hole (123), and the second positioning hole (1210) are all arranged at the top of the lower outer back door panel (12).

4. The back door structure according to claim 1, characterized in that: The upper outer back door panel (11) has a first wrinkle-absorbing rib (117) and a first welding surface (118). The first welding surface (118) is located below the first wrinkle-absorbing rib (117), and the first welding surface (118) is convex.

5. The back door structure according to claim 1, wherein: The lower outer back door panel (12) has a second wrinkle-absorbing rib (126), a welding edge (121), and a reinforcing boss (128). The welding edge (121) is located above the second wrinkle-absorbing rib (126). The reinforcing bosses (128) are symmetrically arranged at the top of the lower outer back door panel (12).

6. The back door structure according to claim 1, wherein: The inner back door panel assembly (2) includes an inner back door panel (21), a hinge nut plate (22), a first reinforcing component, and a second reinforcing component. The hinge nut plates (22) are symmetrically arranged at the top of the inner back door panel (21). The first reinforcing component is fixedly arranged on the periphery of the inner back door panel (21). The second reinforcing component is fixedly arranged in the middle and on both sides of the middle of the inner back door panel (21).

7. The back door structure according to claim 6, characterized in that: The first reinforcing component includes a hinge reinforcing member (23), a strut reinforcing member (24), a back door middle reinforcing member (27), and an inner handle reinforcing member (28). The hinge reinforcing members (23) are arranged on both sides at the top of the inner back door panel (21). The strut reinforcing members (24) are arranged on both sides of the inner back door panel (21). The back door middle reinforcing member (27) is arranged in the middle at the bottom of the inner back door panel (21). The inner handle reinforcing member (28) is arranged on one side of the back door middle reinforcing member (27).

8. The back door structure according to claim 7, wherein: The second reinforcement component includes a wiper reinforcement (26) and an inner panel reinforcement (25). The wiper reinforcement (26) is arranged in the middle of the inner panel (21) of the rear door and is fixedly connected to the first reinforcement component. The inner panel reinforcement (25) is arranged on both sides of the inner panel (21) of the rear door and is fixedly connected to the first reinforcement component.

9. The back door structure according to claim 8, characterized in that: The strut reinforcement (24), the middle reinforcement (27) of the rear door, and the wiper reinforcement (26) form a "T" - shaped reinforcement structure for overall reinforcement of the middle - lower region of the rear door structure.

10. The back door structure according to claim 6, characterized in that: The inner panel (21) of the rear door has an exhaust hole (219) and a liquid leakage hole (212). The exhaust hole (219) is arranged at the top of the inner panel (21) of the rear door, and the liquid leakage hole (212) is arranged at the bottom of the inner panel (21) of the rear door.

11. A vehicle, characterized in that: It includes a vehicle body and the rear door structure according to any one of claims 1 - 10.

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