Vehicle

Abstract

The application provides a vehicle, and relates to the technical field of vehicles.The vehicle provided by the application comprises a vehicle body, a back door assembly, two supporting rods, two fixing seat assemblies and a protection rod.The back door assembly comprises a lower back door, the lower back door is rotationally connected with the vehicle body, and the two supporting rods are arranged at intervals in the width direction of the vehicle body; when the lower back door is in an open state, the first end of the supporting rod abuts against the vehicle body; the two fixing seat assemblies are connected to the lower back door, the two fixing seat assemblies are arranged in one-to-one correspondence with the two supporting rods, and the second end of the supporting rod is connected to the corresponding fixing seat assembly; and the protection rod is connected between the two fixing seat assemblies.The vehicle provided by the application has high safety performance.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a vehicle. Background Technology

[0002] The bottom tailgate is a common design in vehicle tailgates. When the bottom tailgate is opened, it can serve as a temporary seating area to enhance the vehicle's versatility. The reliable limiting of the bottom tailgate's open state directly affects the safety and stability of the tailgate's use. Meanwhile, the protection effect of the high-voltage battery pack in the trunk area of ​​new energy vehicles is related to the overall vehicle's collision safety.

[0003] In related technologies, the lower tailgate of a split-type rear tailgate often uses a pull rope system to fix it in the open state. This pull rope system is independent of the tailgate hinges, which are usually located on both sides of the vehicle. Most hinge structures do not have a limiting mechanism, and some hinges with limiting mechanisms have a limiting angle greater than the actual opening angle of the lower tailgate. Furthermore, for new energy vehicles with high-voltage battery packs installed in the trunk area, the battery packs are currently mostly located directly below or in the rear of the trunk.

[0004] In the aforementioned rear tailgate, the pull cord limiting system has insufficient strength and is prone to breakage and detachment due to material aging, external impact, or fatigue, posing a risk of limiting failure. Moreover, in the event of a rear-end collision, the external impact force will be directly transmitted to the battery pack. This direct impact can easily cause a short circuit inside the battery pack, leading to thermal runaway and fire, resulting in poor overall vehicle safety. Utility Model Content

[0005] This application provides a vehicle that can effectively limit the lower tailgate when it is open; moreover, by setting a protective bar, it can prevent the impact force from directly acting on the battery pack in the event of a rear-end collision, thereby improving the overall safety performance of the vehicle.

[0006] This application provides a vehicle, including a body, a tailgate assembly, two struts, two fixed seat assemblies, and a guard bar; the tailgate assembly includes a lower tailgate, the lower tailgate is rotatably connected to the body, and the two struts are arranged at intervals along the width direction of the body. When the lower tailgate is in the open state, the first end of the strut abuts against the body; the two fixed seat assemblies are connected to the lower tailgate, and the two fixed seat assemblies are arranged one-to-one with the two struts, and the second end of the strut is connected to the corresponding fixed seat assembly; the guard bar is connected between the two fixed seat assemblies.

[0007] In this way, the limiting force of the lower tailgate in the open state can be transmitted to the vehicle body through a rigid strut. Compared with the flexible force-bearing of the pull rope system in related technologies, the rigid strut has better material strength and structural stability, which can effectively resist the performance degradation caused by material aging. At the same time, the risk of breakage and detachment is reduced under external impact or fatigue conditions of long-term use, thus avoiding the problem of pull rope limiting failure from the structural principle. In addition, the strut is directly connected to the lower tailgate, and its limiting angle can be precisely matched to the actual opening requirements of the lower tailgate. It does not need to rely on the side tailgate hinges in related technologies that do not have a limiting mechanism or have an excessively large limiting angle, further ensuring the reliable fixation of the lower tailgate in the open state and improving the safety and stability of use scenarios such as temporary seating.

[0008] Moreover, when a vehicle is involved in a rear-end collision, the external impact force acts on the guard bar first. The guard bar can buffer and disperse part of the impact force through its own structural strength. At the same time, it transmits the force to the strut and the vehicle body through the connected mounting bracket, preventing the impact force from being directly transmitted to the battery pack in the trunk area. This reduces the probability of the battery pack causing internal short circuits due to direct impact, leading to thermal runaway and fire accidents, and improves the overall collision safety performance of the vehicle.

[0009] Furthermore, the mounting bracket serves as both a connecting carrier between the strut and the lower tailgate, providing a structural basis for the limiting function, and a mounting base for the protective bar, enabling the protective bar to stably perform its collision protection function. The shared connection structure not only simplifies the component layout in the vehicle's trunk area and avoids the space occupation problem caused by adding an extra protective structure, but also achieves a simultaneous improvement in the reliability of the lower tailgate's limiting function and the safety of the battery pack protection, thus improving the functional defects and safety hazards of the top and bottom tailgates in related technologies.

[0010] As an optional implementation, the tailgate includes a tailgate body and an inner panel connected together. The outer surface of the tailgate body forms part of the vehicle's exterior surface, and the inner panel is connected to the interior of the tailgate body. The inner panel includes a main body and two extensions. The main body is connected to the tailgate body and is rotatably connected to the vehicle body. The two extensions are connected to opposite sides of the main body along the width direction of the vehicle body. The fixing seat assembly includes a first fixing seat and a second fixing seat. The first fixing seat and the second fixing seat are respectively connected to opposite sides of the extensions. The end of the guard rod is connected to the first fixing seat, and the second end of the support rod is connected to the second fixing seat.

[0011] This dual-sided installation method makes full use of the structural space of the extension, avoids installation interference that may occur when a single fixed seat connects both the support rod and the guard rod, and allows the forces of both to be applied to different sides of the extension, thus optimizing the force distribution and improving the overall structural load-bearing stability.

[0012] As an alternative implementation, the end of the guard rod is welded to the first fixing seat.

[0013] Compared to detachable methods such as bolted connections and snap-fit ​​connections, welding allows the end of the guard rod to form an integrated structure with the first fixing seat, eliminating connection gaps and the risk of loosening, and effectively avoiding the problem of loosening of connecting parts due to vibration and bumps during long-term use.

[0014] As an alternative implementation, the first fixing seat, the extension, and the second fixing seat are detachably connected together by fasteners.

[0015] In the manufacturing process, the first fixed seat, the extension and the second fixed seat can be machined with high precision and then assembled with fasteners. This eliminates the need for complex integrated molding or welding processes, reducing the requirements for production equipment and process precision. Especially for mass production, it can effectively improve assembly efficiency.

[0016] As an alternative implementation, the guard rod is hollow inside, and the longitudinal cross-sectional profile of the guard rod is elliptical.

[0017] In this way, the bending and impact resistance can be improved by using the stress principle of hollow beams in the mechanics of materials, while reducing the amount of materials used and the manufacturing cost.

[0018] As an optional implementation, the vehicle provided in this application also includes a hinge, and the lower tailgate is rotatably connected to the vehicle body via the hinge; the hinge includes a first leaf and a second leaf that are rotatably connected, the first leaf being connected to the vehicle body and the second leaf being connected to the lower tailgate; wherein, when the lower tailgate is in the open state, a portion of the structure of the first leaf abuts against the bottom end of the second leaf.

[0019] In this way, when the back door is in the open position, the hinge itself has a basic limiting function, providing users with double safety protection.

[0020] As an optional implementation, the first leaf includes a first fixed plate, a rotating arm, and a limiting part; the first fixed plate is connected to the vehicle body; the rotating arm is connected to the first fixed plate, and the rotating arm and the second leaf are rotatably connected via a rotating shaft; the limiting part is connected to the side of the rotating arm opposite to the first fixed plate; wherein, when the lower tailgate is in the open state, the limiting part abuts against the bottom end of the second leaf.

[0021] This effectively prevents the lower rear door from suddenly falling down in situations such as temporary seating, thus improving safety.

[0022] As an optional implementation, the second page includes a second fixed plate and a rotating part; the second fixed plate is connected to the lower tailgate; the rotating part is connected to the second fixed plate, and the rotating part is rotatably connected to the rotating arm via a rotating shaft, and a rotating space is formed on the rotating part for a portion of the rotating arm structure to extend into; wherein, when the lower tailgate is in the open state, the limiting part abuts against the bottom end of the rotating part.

[0023] When the rear door is opened, the torque transmitted by the rotating part can be evenly distributed to the rotating arm through the inner wall of the rotating space, avoiding damage to the components caused by excessive local stress and improving the overall load-bearing capacity of the hinge.

[0024] As an optional implementation, the first page also includes two reinforcing plates, which are disposed on both sides of the rotating arm along the width direction of the vehicle body; the reinforcing plates are connected between the first fixed plate and the rotating arm.

[0025] In this way, by setting up the reinforcing plate, the structural strength of the first panel can be improved, which in turn can improve the structural strength of the hinge, thereby improving the reliability of the connection between the lower tailgate and the vehicle body.

[0026] As an optional implementation, the lower tailgate is rotatably connected to the vehicle body via two hinges; wherein the two hinges are spaced apart along the width direction of the vehicle body.

[0027] In this way, two-point symmetrical limiting can be formed when the door is in the limiting position. Together with the support rods on both sides, it forms a dual protection system of two-point limiting and two-point support. This not only further reduces the stress load on a single hinge and a single support rod, but also effectively prevents the tailgate from tilting or falling due to excessive force on one side, further improving the stability of the tailgate when it is open. Attached Figure Description

[0028] Figure 1 A schematic diagram of a partial structure of the vehicle provided in an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of a partial structure of the structure shown; Figure 3 for Figure 2 A schematic diagram of a partial structure of the structure shown; Figure 4 for Figure 3 Enlarged schematic diagram of the local structure at point A; Figure 5 for Figure 3 A schematic diagram of a partial structure of the structure shown; Figure 6 for Figure 5 Enlarged schematic diagram of the local structure at point B; Figure 7 for Figure 5A schematic diagram of the structure shown from another perspective; Figure 8 for Figure 7 Enlarged schematic diagram of the local structure at point C; Figure 9 A three-dimensional structural diagram of a protective bar in a vehicle provided in an embodiment of this application; Figure 10 for Figure 1 A schematic diagram of the structure shown in another state; Figure 11 for Figure 10 A schematic diagram of a partial structure of the structure shown; Figure 12 for Figure 11 Enlarged schematic diagram of the local structure at point D; Figure 13 for Figure 11 A schematic diagram of the hinge structure in the diagram; Figure 14 for Figure 13 Cross-sectional view along the EE direction; Figure 15 This is a three-dimensional structural diagram of the first leaf in a vehicle provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures: 1. Body; 2. Tailgate assembly; 3. Stirrup; 4. Mounting bracket assembly; 5. Protective bar; 6. Fasteners; 7. Hinges; 21. Lower back door; 41. First fixing seat; 42. Second fixing seat; 71. First leaf piece; 72. Second leaf piece; 73. Spindle; 211. Back door body; 212. Inner panel; 213. Fastening plate; 411. First mounting plate; 412. Second mounting plate; 421. First connecting plate; 422. Second connecting plate; 711. First fixing plate; 712. Rotating arm; 713. Limiting part; 714. Reinforcing plate; 721. Second fixing plate; 722. Rotating part; 2121. Main body; 2122. Extension; 7221. Rotation space. Detailed Implementation

[0030] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0031] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0032] In related technologies, the lower tailgate of a split-type rearview door often uses a pull rope system to fix it in the open state. This pull rope system is independent of the tailgate hinges, which are usually located on both sides of the vehicle. Most hinge structures do not have a limiting mechanism, and some hinges with limiting mechanisms have a limiting angle greater than the actual opening angle of the lower tailgate. Furthermore, for new energy vehicles with high-voltage battery packs installed in the trunk area, the battery packs are currently mostly located directly below or in the rear of the trunk. In the aforementioned split-type rearview door systems, the pull rope limiting system suffers from insufficient strength and is prone to breakage and detachment due to material aging, external impact, or fatigue, posing a risk of limiting failure. Moreover, in the event of a rear-end collision, the external impact force is directly transmitted to the battery pack. This direct impact can easily cause a short circuit inside the battery pack, leading to thermal runaway and fire, resulting in poor overall vehicle safety.

[0033] Based on this, this application provides a vehicle that can effectively limit the lower tailgate when it is open; moreover, by setting a protective bar, the impact force can be prevented from directly acting on the battery pack in the event of a rear-end collision, thereby improving the overall safety performance of the vehicle.

[0034] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific implementation details.

[0035] Please combine Figures 1 to 4 , Figure 1 This is a schematic diagram of a partial structure of the vehicle provided in an embodiment of this application. Figure 2 for Figure 1 A schematic diagram of a partial structure of the structure shown. Figure 3 for Figure 2 A schematic diagram of a partial structure of the structure shown. Figure 4 for Figure 3 A magnified view of a partial structure at point A. This embodiment provides a vehicle, including a body 1, a tailgate assembly 2, two support rods 3, two fixed seat assemblies 4, and a protective rod 5; the tailgate assembly 2 includes a lower tailgate 21, which is rotatably connected to the body 1; the two support rods 3 are arranged at intervals along the width direction of the body 1, and when the lower tailgate 21 is in the open state, the first end of the support rod 3 abuts against the body 1; the two fixed seat assemblies 4 are connected to the lower tailgate 21, and the two fixed seat assemblies 4 are arranged one-to-one with the two support rods 3, and the second end of the support rod 3 is connected to the corresponding fixed seat assembly 4; the protective rod 5 is connected between the two fixed seat assemblies 4.

[0036] In this way, the limiting force of the lower tailgate 21 in the open state can be transmitted to the vehicle body 1 through the rigid strut 3. Compared with the flexible force of the pull rope system in related technologies, the rigid strut 3 has better material strength and structural stability, which can effectively resist the performance degradation caused by material aging. At the same time, the risk of breakage and detachment is reduced under external impact or fatigue conditions of long-term use, thus avoiding the problem of pull rope limiting failure from the structural principle. In addition, the strut 3 is directly connected to the lower tailgate 21, and its limiting angle can accurately match the actual opening requirements of the lower tailgate 21. It does not need to rely on the side tailgate hinges in related technologies that do not have a limiting mechanism or have an excessively large limiting angle, further ensuring the reliable fixation of the lower tailgate 21 in the open state and improving the safety and stability of use scenarios such as temporary seating.

[0037] Moreover, when a rear-end collision occurs, the external impact force first acts on the guard bar 5. The guard bar 5 can buffer and disperse part of the impact force through its own structural strength. At the same time, it transmits the force to the strut 3 and the body 1 through the connected fixed seat assembly 4, avoiding the impact force being directly transmitted to the battery pack in the trunk area. This reduces the probability of the battery pack causing internal short circuits due to direct impact, leading to thermal runaway and fire accidents, and improves the overall collision safety performance of the vehicle.

[0038] In addition, the fixed base assembly 4 serves as both a connecting carrier between the support rod 3 and the lower tailgate 21, providing a structural basis for the limiting function, and a mounting base for the protective rod 5, enabling the protective rod 5 to stably perform its collision protection function. The sharing of the same connection structure not only simplifies the component layout in the vehicle's trunk area and avoids the space occupation problem caused by adding an extra protective structure, but also achieves a simultaneous improvement in the limiting reliability of the lower tailgate 21 and the safety of the battery pack protection, thus improving the functional defects and safety hazards of the top and bottom tailgates in related technologies.

[0039] It should be noted that the width direction of the aforementioned vehicle body 1 is... Figures 1 to 3 The YY axes are aligned.

[0040] It is understandable that, in order to enhance the structural strength of the lower tailgate 21, in some specific embodiments, the lower tailgate 21 includes a tailgate body 211 and an inner panel 212 connected together, the outer surface of the tailgate body 211 forms part of the vehicle's exterior surface, and the inner panel 212 is connected to the interior of the tailgate body 211.

[0041] To achieve the connection between the fixed seat assembly 4 and the lower tailgate 21, in some embodiments, the inner panel 212 includes a main body 2121 and two extensions 2122. The main body 2121 is connected to the tailgate body 211 and is rotatably connected to the vehicle body. The two extensions 2122 are connected to opposite sides of the main body 2121 along the width direction of the vehicle body 1. The fixed seat assembly 4 includes a first fixed seat 41 and a second fixed seat 42. The first fixed seat 41 and the second fixed seat 42 are respectively connected to opposite sides of the extensions 2122. The end of the guard rod 5 is connected to the first fixed seat 41, and the second end of the support rod 3 is connected to the second fixed seat 42.

[0042] The outer surface of the tailgate body 211 serves as part of the vehicle's exterior appearance, ensuring the integrity and aesthetics of the vehicle's exterior. The inner panel 212 acts as the connecting core and load-bearing carrier. Its main body 2121 is directly connected to the tailgate body 211, enabling the lower tailgate 21 to rotate with the vehicle body. This provides a stable rotational foundation for the opening and closing of the lower tailgate 21. Meanwhile, the two extensions 2122 are symmetrically arranged on both sides of the main body 2121 along the width of the vehicle body, forming a symmetrical load-bearing support structure. This allows the force from the struts 3 and the protective rods 5 to be transmitted more evenly to the inner panel 212 and even the tailgate body 211, avoiding structural deformation or damage caused by localized stress concentration.

[0043] The first fixing seat 41 and the second fixing seat 42 of the fixing seat assembly 4 are respectively connected to opposite sides of the extension 2122. This double-sided installation method makes full use of the structural space of the extension 2122, avoids the installation interference that may occur when a single fixing seat connects the support rod 3 and the guard rod 5 at the same time, and makes the forces of the two act on different sides of the extension 2122 respectively, further optimizing the force distribution and improving the load-bearing stability of the overall structure.

[0044] In addition, the second fixing seat 42 connects to the second end of the support rod 3. The support rod 3, as the core component for limiting the opening state of the lower tailgate 21, has its connection point connected to the extension 2122 of the inner panel 212 through the second fixing seat 42. This allows the limiting force of the support rod 3 to be efficiently transmitted to the extension 2122 through the second fixing seat 42, and then to the vehicle body through the main body 2121, ensuring the accuracy of the limiting angle of the support rod 3 and the reliability of the limiting state.

[0045] Meanwhile, the first fixing seat 41 is used to connect the end of the protective rod 5. As a component for battery pack collision protection, the protective rod 5 forms a protective barrier spanning the width of the vehicle body through the connection between the first fixing seat 41 and the extension 2122. When a rear-end collision occurs, the impact force borne by the protective rod 5 can be quickly transmitted to the extensions 2122 on both sides through the first fixing seat 41, and then transmitted to the vehicle body as a whole through the inner plate 212. This achieves the dispersion and buffering of the impact force, avoids the impact force acting directly on the battery pack, and reduces the risk of thermal runaway.

[0046] Please continue to combine Figures 5 to 8 , Figure 5 for Figure 3 A schematic diagram of a partial structure of the structure shown. Figure 6 for Figure 5 A magnified view of the local structure at point B. Figure 7 for Figure 5 The diagram shows the structure from another perspective. Figure 8 for Figure 7 A magnified view of the partial structure at point C. In some specific embodiments, the first fixing base 41 includes a first mounting plate 411 and a second mounting plate 412 that are angled to each other and connected together. The first mounting plate 411 is connected to the end of the guard rod 5. The second fixing base 42 includes a first connecting plate 421 and a second connecting plate 422 that are angled to each other and connected together. The first connecting plate 421, the extension 2122 and the second mounting plate 412 are connected together. The second connecting plate 422 is used to fix the second end of the support rod 3.

[0047] To improve the reliability of the connection between the protective rod 5 and the first fixing seat 41, in some embodiments, the end of the protective rod 5 is welded to the first fixing seat 41. Specifically, the end of the protective rod 5 is welded to the first mounting plate 411, and the welding method here can be MIG welding. No specific restrictions are placed on the welding method between the end of the protective rod 5 and the first mounting plate 411. Compared to detachable methods such as bolt connections and snap-fit ​​connections, welding allows the end of the protective rod 5 and the first fixing seat 41 to form an integrated structure, eliminating connection gaps and the risk of loosening, and effectively preventing the connection parts from loosening due to vibration and bumps during long-term use.

[0048] When a rear-end collision occurs, the external impact force is concentrated on the protective bar 5. The welded rigid connection node can quickly and evenly transfer the impact force to the first fixing seat 41, and then through the first fixing seat 41 to the extension 2122 of the inner panel 212, and then diffuse to the entire vehicle body through the main body 2121. This force transmission path can reduce the loss and retention of impact force at the connection node, avoid the protective bar 5 from falling off or shifting due to connection failure, and ensure that it always maintains its protective barrier form across the width of the vehicle body 1, providing continuous and reliable protection for the high-voltage battery pack in the trunk area, and reducing the risk of short circuit and thermal runaway caused by direct impact.

[0049] Secondly, the first fixing seat 41 is connected to one side of the extension 2122 and needs to form a functional partition with the second fixing seat 42 on the same side, resulting in a relatively compact spatial layout. The welding process does not require additional bolts, nuts, or other connecting accessories, and will not occupy extra space on the side of the extension 2122, effectively avoiding installation interference with the second fixing seat 42 and the support rod 3.

[0050] Moreover, as a core component of collision protection, the guard bar 5 not only withstands enormous impact forces during collisions but also endures alternating loads such as vehicle vibration and road bumps during daily driving. The integrated welded structure evenly distributes these alternating loads to the connection nodes and the entire bar, preventing localized stress concentrations caused by gap vibrations in detachable connections and effectively delaying the initiation and propagation of fatigue cracks. Simultaneously, the welded nodes provide excellent sealing, preventing rainwater, dust, and other impurities from intruding into the connection areas and causing corrosion. Especially in the critical scenario of protecting new energy vehicle battery packs, this prevents corrosion-induced weakening of connection strength, ensuring that the guard bar 5 maintains its designed protective performance throughout the vehicle's entire lifespan.

[0051] Of course, a higher assembly efficiency between the mounting bracket 4 and the extension 2122 also improves the overall assembly efficiency of the vehicle. Therefore, in some optional embodiments, the first mounting bracket 41, the extension 2122, and the second mounting bracket 42 are detachably connected together by fasteners 6. Specifically, the second mounting plate 412, the extension 2122, and the first connecting plate 421 are detachably connected together by fasteners 6. The fasteners 6 can be threaded fasteners such as screws.

[0052] In other words, by using fastener 6 to penetrate the second mounting plate 412, the extension 2122 and the first connecting plate 421 to form an integrated connection structure, compared with the independent installation of a single component, this method can make the force on both sides of the extension 2122 more symmetrical, avoiding component displacement or stress concentration that may be caused by unilateral installation.

[0053] The mechanical connection strength of fastener 6 can be precisely matched according to the limiting force of support rod 3 and the impact force requirement of protective rod 5. This ensures that in daily use, the limiting force transmitted by support rod 3 through second fixing seat 42 and the impact force transmitted by protective rod 5 through first fixing seat 41 can form a stable force transmission path through fastener 6 and extension 2122, ultimately transmitting to main body 2121 and vehicle body. This ensures both the reliability of the lower tailgate 21 opening limit and the effectiveness of battery pack collision protection, avoiding functional failures due to insufficient connection strength. Simultaneously, this connection method can eliminate assembly gaps between components through the pre-tightening force of fastener 6, reducing abnormal noises caused by vibration during vehicle operation and improving the overall vehicle's usability.

[0054] Furthermore, in the manufacturing process, the first fixed base 41, the extension 2122 and the second fixed base 42 can be machined with high precision and then assembled with fasteners 6. This eliminates the need for complex integrated molding or welding processes, reducing the requirements for production equipment and process precision. Especially for mass production, this can effectively improve assembly efficiency and facilitate fine-tuning of component positions during assembly. This ensures that the connection positions of the first fixed base 41 and the guard rod 5, and the second fixed base 42 and the support rod 3 correspond, avoiding functional compatibility issues caused by assembly errors.

[0055] Moreover, in later maintenance scenarios, if the support rod 3, the guard rod 5, or the fixing seat assembly 4 is damaged, the components can be quickly separated by disassembling the fasteners 6 and the damaged components can be replaced individually without disassembling the entire structure such as the lower tailgate 21, thus reducing maintenance costs and time.

[0056] Please continue to combine Figure 9 , Figure 9 This is a three-dimensional structural diagram of a protective rod in a vehicle provided in an embodiment of this application. Regarding the shape of the protective rod 5, it can be hollow inside, and the longitudinal cross-sectional profile of the protective rod 5 can be elliptical.

[0057] Compared to solid guardrails, hollow structures can improve bending and impact resistance by reducing material usage and manufacturing costs, while leveraging the stress principles of hollow beams in materials mechanics. Specifically, in a rear-end collision, the impact force primarily acts on the outer perimeter of guardrail 5. The hollow structure can evenly distribute stress across the entire tube wall, preventing stress concentration that could lead to structural fracture. Furthermore, the elliptical cross-section limits the space occupied by guardrail 5 while maintaining strength, avoiding interference with other components.

[0058] Please continue to combine Figures 10 to 12 , Figure 10 for Figure 1 The diagram shows the structure in another state. Figure 11for Figure 10 A schematic diagram of a partial structure of the structure shown. Figure 12 for Figure 11 A magnified view of the partial structure at point D. To achieve a rotatable connection between the lower tailgate 21 and the vehicle body 1, the vehicle provided in this embodiment also includes a hinge 7, through which the lower tailgate 21 and the vehicle body 1 are rotatably connected. The hinge 7 includes a first leaf 71 and a second leaf 72 that are rotatably connected. The first leaf 71 is connected to the vehicle body 1, and the second leaf 72 is connected to the lower tailgate 21. Specifically, a fastening plate 213 extending towards one side of the vehicle body 1 is connected to the inner panel 212, and the second leaf 72 is connected to the fastening plate 213.

[0059] Please continue to combine Figure 13 and Figure 14 , Figure 13 for Figure 11 A schematic diagram of the hinge structure in the diagram. Figure 14 for Figure 13 A cross-sectional view along the EE direction. As shown, when the tailgate 21 is in the open state, a portion of the structure of the first leaf 71 abuts against the bottom end of the second leaf 72. Thus, when the tailgate 21 is in the open state, the hinge 7 itself has a basic limiting function.

[0060] On the one hand, the limiting structure can bear part of the weight of the lower tailgate 21 while the support rod 3 plays the main limiting role, reducing the stress load on the support rod 3, slowing down the fatigue aging rate of the support rod 3, and avoiding the risk of limiting failure caused by long-term overload of the support rod 3; on the other hand, when the support rod 3 experiences a brief fluctuation in force due to unexpected circumstances (such as sudden external impact), the stop limiting of the hinge 7 can serve as a backup protection to prevent the lower tailgate 21 from suddenly falling, providing users with double safety protection.

[0061] Please continue to combine Figure 15 , Figure 15 This is a three-dimensional structural diagram of the first leaf piece in a vehicle provided in an embodiment of this application. In a specific implementation of this embodiment, the first leaf piece 71 includes a first fixing plate 711, a rotating arm 712, and a limiting part 713; the first fixing plate 711 is connected to the vehicle body 1; the rotating arm 712 is connected to the first fixing plate 711, and the rotating arm 712 is rotatably connected to the second leaf piece 72 via a rotating shaft; the limiting part 713 is connected to the side of the rotating arm 712 opposite to the first fixing plate 711; wherein, when the lower tailgate 21 is in the open state, the limiting part 713 abuts against the bottom end of the second leaf piece 72. The limiting part 713 is connected to the side of the rotating arm 712 opposite to the first fixing plate 711. This positional design allows the limiting part 713 to engage with the bottom end of the second leaf piece 72 when the lower tailgate 21 is open, achieving limitation through abutment.

[0062] When the lower tailgate 21 is open, the limiting part 713 and the stop of the second leaf 72 form the first limiting line, bearing part of the weight of the lower tailgate 21, reducing the stress on the support rod 3, slowing down the fatigue aging rate of the support rod 3, and reducing the risk of its breakage failure. The support rod 3, as the second limiting line, can further stabilize the open state of the lower tailgate 21 through rigid support. When the limiting part 713 wears down due to long-term use, causing an increase in the stop clearance, the support rod 3 can promptly compensate for the decrease in limiting accuracy, ensuring that the lower tailgate 21 always remains stable. In this way, in scenarios such as temporary seating, the lower tailgate 21 can be effectively prevented from suddenly falling, improving safety.

[0063] The specific structure of the second page 72 can be as follows: the second page 72 includes a second fixing plate 721 and a rotating part 722; the second fixing plate 721 is connected to the lower tailgate 21; the rotating part 722 is connected to the second fixing plate 721, and the rotating part 722 is rotatably connected to the rotating arm 712 through a rotating shaft 73, and a rotating space 7221 is formed on the rotating part 722 for a portion of the rotating arm 712 to extend into; wherein, when the lower tailgate 21 is in the open state, the limiting part 713 abuts against the bottom end of the rotating part 722.

[0064] When the rear door 21 is opened, the torque transmitted by the rotating part 722 can be evenly applied to the rotating arm 712 through the inner wall of the rotating space 7221, avoiding damage to the components caused by excessive local stress and improving the overall load-bearing capacity of the hinge 7.

[0065] It should be noted that the second fixing plate 721 is connected to the fastening plate 213, and the connection between the first fixing plate 711 and the vehicle body 1, as well as the connection between the second fixing plate 721 and the fastening plate 213, can both be achieved using threaded fasteners such as screws. No specific restrictions are placed on the connection methods between the first fixing plate 711 and the vehicle body 1, or between the second fixing plate 721 and the fastening plate 213.

[0066] To enhance the structural strength of the first leaf piece 71 and consequently the hinge 7, in some optional embodiments, the first leaf piece 71 further includes two reinforcing plates 714. These reinforcing plates 714 are disposed on both sides of the rotating arm 712 along the width direction of the vehicle body 1. The reinforcing plates 714 connect the first fixed plate 711 and the rotating arm 712. Thus, the reinforcement plates 714 enhance the structural strength of the first leaf piece 71, thereby improving the structural strength of the hinge 7 and ultimately enhancing the reliability of the connection between the lower tailgate 21 and the vehicle body 1.

[0067] Furthermore, in this embodiment, the lower tailgate 21 is rotatably connected to the vehicle body 1 via two hinges 7; wherein the two hinges 7 are arranged at intervals along the width direction of the vehicle body 1. In this way, two-point symmetrical limiting can be formed when the tailgate is in the limiting position, forming a dual protection system of two-point limiting and two-point support with the support rods 3 on both sides. This not only further reduces the stress load on a single hinge 7 and a single support rod 3, but also effectively prevents the lower tailgate 21 from tilting or falling due to excessive force on one side, further improving the stability of the lower tailgate 21 in the open state.

[0068] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vehicle, characterized in that, include: Body; A tailgate assembly, including a lower tailgate, the lower tailgate being rotatably connected to the vehicle body; Two struts are arranged at intervals along the width direction of the vehicle body. When the lower tailgate is in the open state, the first end of the strut abuts against the vehicle body. Two fixed base assemblies are connected to the lower tailgate, and the two fixed base assemblies are respectively arranged with the two support rods, with the second end of each support rod connected to the corresponding fixed base assembly; and The protective rod is connected between the two mounting bracket assemblies.

2. The vehicle according to claim 1, characterized in that, The lower tailgate includes a tailgate body and an inner panel connected together. The outer surface of the tailgate body forms part of the vehicle's exterior surface, and the inner panel is connected to the interior of the tailgate body. The inner panel includes a main body and two extensions. The main body is connected to the tailgate body and is rotatably connected to the vehicle body. The two extensions are connected to opposite sides of the main body along the width direction of the vehicle body. The fixing base assembly includes a first fixing base and a second fixing base, which are respectively connected to opposite sides of the extension. The end of the protective rod is connected to the first fixing base, and the second end of the support rod is connected to the second fixing base.

3. The vehicle according to claim 2, characterized in that, The end of the protective rod is welded to the first fixing seat.

4. The vehicle according to claim 2, characterized in that, The first fixing seat, the extension, and the second fixing seat are detachably connected together by fasteners.

5. The vehicle according to any one of claims 1 to 4, characterized in that, The protective rod is hollow inside, and the longitudinal cross-sectional profile of the protective rod is elliptical.

6. The vehicle according to any one of claims 1 to 4, characterized in that, It also includes a hinge, through which the tailgate is rotatably connected to the vehicle body; The hinge includes a first leaf and a second leaf that are rotatably connected, the first leaf being connected to the vehicle body and the second leaf being connected to the lower tailgate; When the lower rear door is in the open state, a portion of the structure of the first leaf abuts against the bottom end of the second leaf.

7. The vehicle according to claim 6, characterized in that, The first page includes: The first fixing plate is connected to the vehicle body; A rotating arm is connected to the first fixed plate, and the rotating arm is rotatably connected to the second leaf blade via a rotating shaft; and A limiting part is connected to the side of the rotating arm opposite to the first fixed plate; When the lower tailgate is in the open state, the limiting part abuts against the bottom end of the second leaf.

8. The vehicle according to claim 7, characterized in that, The second page includes: A second fixing plate is connected to the lower tailgate; and A rotating part is connected to the second fixed plate. The rotating part is rotatably connected to the rotating arm through the rotating shaft, and a rotating space is formed on the rotating part for a portion of the rotating arm structure to extend into. When the lower tailgate is in the open state, the limiting part abuts against the bottom end of the rotating part.

9. The vehicle according to claim 7, characterized in that, The first leaf also includes two reinforcing plates, which are disposed on both sides of the rotating arm along the width direction of the vehicle body; The reinforcing plate is connected between the first fixed plate and the rotating arm.

10. The vehicle according to any one of claims 7 to 9, characterized in that, The lower tailgate is rotatably connected to the vehicle body via two hinges. The two hinges are arranged at intervals along the width direction of the vehicle body.

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