Bottom guard plate pre-hanging system and vehicle

Abstract

The utility model relates to the technical field of vehicles, and provides a bottom protection plate pre-hanging system and a vehicle, the bottom protection plate pre-hanging system comprises a bottom protection plate and a plurality of vehicle function components, the circumferential direction of the bottom protection plate is defined by a plurality of protection plate edges, the bottom protection plate is provided with a plurality of pre-hanging structures, and the pre-hanging structures are distributed on the protection plate edges in a scattered mode; the multiple vehicle function components are provided with multiple supporting structures, the multiple supporting structures are arranged on the multiple vehicle function components in a scattered mode, and the multiple pre-hanging structures are connected with the multiple supporting structures so that the bottom protection plate can be pre-hung to the multiple vehicle function components. According to the scheme, the problems that in the prior art, a bottom protection plate is large in size and needs to be cooperatively installed by multiple persons, and labor cost is large can be solved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a pre-attached underbody protection system and a vehicle. Background Technology

[0002] Driving range is a crucial performance indicator for new energy vehicles, and a key factor influencing purchasing decisions and market competitiveness. Existing technologies typically improve new energy vehicles in two ways to enhance their driving range: firstly, by optimizing battery performance; and secondly, by reducing the overall vehicle drag coefficient.

[0003] Aerodynamic drag is a significant factor affecting vehicle energy consumption. Optimizing the vehicle's design, such as adding a large underbody shield, can create smoother lines, thereby reducing drag, lowering energy consumption, and increasing the driving range of new energy vehicles. However, underbody shields are typically large, requiring multiple people to work together during installation, resulting in high labor costs. Utility Model Content

[0004] In view of this, this application provides a pre-attached underbody protection plate system and vehicle to solve the problem that the underbody protection plate is large in size, requires multiple people to cooperate in installation, and has high labor costs in the prior art.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A pre-installed underbody protection system, comprising:

[0007] The bottom protective plate is surrounded by multiple protective plate edges in its circumference. The bottom protective plate is provided with multiple pre-hanging structures, which are distributed and arranged on the multiple protective plate edges.

[0008] Multiple vehicle functional components have multiple support structures, which are distributed on the multiple vehicle functional components. Multiple pre-attachment structures are connected to the multiple support structures to pre-attach the underbody plate to the multiple vehicle functional components.

[0009] Optionally, the plurality of guard plate edges include a first transverse edge extending laterally along the vehicle, and the plurality of pre-attached structures include an overlap member disposed on the first transverse edge;

[0010] The plurality of vehicle functional components include a rear bumper, the rear bumper including a first portion adjacent to the first lateral side, the plurality of support structures including the first portion, and at least a portion of the connecting member overlapping the first portion.

[0011] Optionally, the lap joint includes a first part and a second part connected in a bent shape, the first part being fixedly connected to the first horizontal edge, and the second part being fitted and connected to the first part.

[0012] Optionally, the first portion and the second portion are connected by a curved surface, the curved surface protruding in a direction away from the first portion, and along the direction from the bottom guard plate to the first portion, the curved surface engages with the first portion; and / or,

[0013] The end of the second part that faces away from the first part curves upwards in a direction away from the first part.

[0014] Optionally, the plurality of guard plate edges include a first longitudinal edge and a second longitudinal edge extending longitudinally along the vehicle and located on opposite sides of the bottom guard plate, and the plurality of pre-attached structures include a first snap-fit ​​structure, wherein both the first longitudinal edge and the second longitudinal edge are provided with the first snap-fit ​​structure.

[0015] The plurality of vehicle functional components include at least two bottom brackets, the at least two bottom brackets being located above the first longitudinal edge and the second longitudinal edge respectively. The plurality of support structures include a second snap-fit ​​structure, and the bottom brackets located above the first longitudinal edge and the second longitudinal edge are all provided with the second snap-fit ​​structure. Each first snap-fit ​​structure and each second snap-fit ​​structure are snap-fitted together in a one-to-one correspondence.

[0016] Optionally, the first snap-fit ​​structure includes a plurality of elastic parts, which protrude from the bottom cover plate toward the bottom support and form a deformation space. At least one of the elastic parts has a snap-fit ​​protrusion on the outer wall opposite to the deformation space.

[0017] The second snap-fit ​​structure includes a snap-fit ​​plate and a snap-fit ​​hole provided on the snap-fit ​​plate. A portion of the first snap-fit ​​structure passes through the snap-fit ​​hole, and the snap-fit ​​protrusion overlaps the surface of the snap-fit ​​plate facing away from the bottom protective plate.

[0018] Optionally, the elastic part with the snap-fit ​​protrusion is further provided with a snap hook, and there is a gap between the snap plate and the bottom guard plate. The snap hook is located in the gap and hooks onto the surface of the snap plate facing the bottom guard plate.

[0019] Optionally, along the snapping direction of the first snapping structure, the overall outer contour of the plurality of elastic parts gradually decreases.

[0020] Optionally, the plurality of guard plate edges include a second transverse edge extending laterally along the vehicle, and the plurality of pre-attached structures include push pins disposed on the second transverse edge;

[0021] The plurality of vehicle functional components include a body bracket located above the underbody protection plate, and the plurality of support structures include a connecting hole provided in the body bracket, wherein the push pin is inserted into the connecting hole so that the second transverse side is connected to the body bracket.

[0022] A vehicle comprising the underbody protection pre-attachment system described in any of the preceding claims.

[0023] In this embodiment, multiple pre-attachment structures allow the underbody protection plate to be pre-attached to multiple vehicle functional components. Therefore, no dedicated personnel are required to support the underbody protection plate. During installation, a single worker can pre-attach the underbody protection plate to the multiple vehicle functional components and then install the bolts to complete the installation, reducing the labor costs required for underbody protection plate installation. Thus, the underbody protection plate pre-attachment system provided in this embodiment solves the problems of large underbody protection plate size, the need for multiple personnel for installation, and high labor costs in the prior art. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the bottom guard plate pre-hanging system provided in the embodiments of this application;

[0026] Figure 2 A schematic diagram of the assembly structure of the lap joint and the first part provided in the embodiments of this application;

[0027] Figure 3 A cross-sectional view of the assembly structure of the lap joint and the first part provided in the embodiments of this application;

[0028] Figure 4 This is a schematic diagram of the assembly structure of the first snap-fit ​​structure and the second snap-fit ​​structure provided in the embodiments of this application;

[0029] Figure 5 This is a schematic diagram of the first snap-fit ​​structure provided in an embodiment of this application;

[0030] Figure 6 This is a schematic diagram of the first snap-fit ​​structure from another angle, provided in an embodiment of this application.

[0031] Figure 7 Cross-sectional view of the first snap-fit ​​structure and the second snap-fit ​​structure assembly structure provided in the embodiments of this application;

[0032] Figure 8 This is a schematic diagram of the bottom structure of the bottom guard plate pre-hanging system provided in an embodiment of this application.

[0033] exist Figures 1-8 middle:

[0034] 100. Bottom guard plate; 110. First horizontal edge; 120. Second horizontal edge; 130. First longitudinal edge; 140. Second longitudinal edge; 150. Overlapping component; 151. First part; 152. Second part; 153. Curved surface; 160. First snap-fit ​​structure; 161. Elastic part; 162. Deformation space; 163. Snap-fit ​​protrusion; 164. Hook; 170. Push pin;

[0035] 200. Rear bumper; 210. First part;

[0036] 300. Bottom support; 310. Card plate; 320. Card hole;

[0037] 400. Vehicle body bracket. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] Installing a skid plate under the vehicle can make the vehicle's lines smoother, thereby reducing wind resistance, reducing energy consumption, and increasing the vehicle's range. The skid plate is typically installed on the target component of the vehicle using bolts. Both the skid plate and the target component have multiple mounting holes. Due to the large size of the skid plate, at least one worker is required to support it during installation, ensuring it is in the correct position and that the mounting holes on the skid plate align with those on the target component. Then, another worker installs the bolts to complete the installation. This installation process requires at least two people working together, resulting in high labor costs.

[0040] To solve the above problems, such as Figures 1 to 8 As shown in the figure, this application embodiment provides a chassis guard pre-mounting system. This chassis guard pre-mounting system includes a chassis guard 100 and a plurality of vehicle functional components.

[0041] The underbody protection plate 100 is used to be installed on the bottom of the vehicle. The underbody protection plate 100 is surrounded by multiple protection plate edges in its circumference. The underbody protection plate 100 has multiple pre-attached structures, which are distributed on multiple protection plate edges. Each protection plate edge has at least one pre-attached structure.

[0042] Vehicle functional components refer to components on a vehicle that have specific functions, such as the rear bumper 200. Multiple vehicle functional components have multiple support structures, which are distributed on multiple vehicle functional components. Each vehicle functional component has at least one support structure. Each pre-attachment structure is connected to a support structure, so that multiple pre-attachment structures are connected to multiple support structures to pre-attach the underbody protection plate 100 to multiple vehicle functional components.

[0043] In this embodiment, the underbody protection plate 100 can be pre-attached to multiple vehicle functional components using multiple pre-attachment structures. Therefore, no dedicated personnel are required to support the underbody protection plate 100. During installation, one worker can pre-attach the underbody protection plate 100 to the multiple vehicle functional components and then install the bolts to complete the installation, reducing the labor costs required for the installation of the underbody protection plate 100. Thus, the underbody protection plate pre-attachment system provided in this embodiment solves the problem in the prior art where the underbody protection plate is large, requiring multiple people to install it, resulting in high labor costs.

[0044] Optionally, after the underbody protection plate 100 is pre-attached to multiple vehicle functional components, the position of the underbody protection plate 100 can be finely adjusted so that the multiple mounting holes on the underbody protection plate 100 are aligned with the multiple mounting holes on the target components of the vehicle before the bolts are installed.

[0045] In this embodiment of the application, when the underbody protection plate 100 is pre-attached to multiple vehicle functional components, the underbody protection plate 100 is pre-installed at the target installation position, and each mounting hole on the underbody protection plate 100 is aligned with the mounting hole on the target vehicle component, so as to prevent the underbody protection plate 100 from having misaligned holes and simplify the installation operation of the underbody protection plate 100.

[0046] Multiple underbody panels may include a first transverse edge 110 extending laterally along the vehicle. Multiple pre-attached structures include overlapping members 150 disposed on the first transverse edge 110. Along the transverse direction of the vehicle, the first transverse edge 110 may have multiple overlapping members 150 spaced apart, for example, four. Optionally, the overlapping members 150 may be connected to the first transverse edge 110 by welding, bolting, or other methods; alternatively, the overlapping members 150 may be integrally formed on the underbody panel 100. It should be noted that the transverse direction of the vehicle refers to the direction between the left and right doors. When the underbody panel 100 is installed on the vehicle, the first transverse edge 110 may be the side facing the rear of the vehicle.

[0047] One of the multiple vehicle functional components may be a rear bumper 200. The rear bumper 200 includes a first portion 210 adjacent to the first horizontal edge 110. One of the multiple support structures is the first portion 210. At least a portion of the connecting member 150 overlaps with the first portion 210. In this case, the first horizontal edge 110 of the underbody protection plate 100 is overlapped onto the rear bumper 200 by the overlap of the connecting member 150 and the first portion 210, thereby achieving the pre-attachment of the first horizontal edge 110 of the underbody protection plate 100.

[0048] The overlap member 150 may include a first part 151 and a second part 152 connected in a bent shape. The first part 151 is fixedly connected to the first horizontal edge 110, and the second part 152 is fitted and connected to the first partial part 210. In this case, by fitting the second part 152 to the first partial part 210, the contact area between the overlap member 150 and the first partial part 210 is increased, thereby increasing the contact area between the bottom guard plate 100 and the rear bumper 200, improving the overlap stability of the two, and thus improving the pre-attachment stability of the bottom guard plate 100.

[0049] In an alternative embodiment, the first portion 151 and the second portion 152 may be directly connected.

[0050] In another alternative embodiment, the first part 151 and the second part 152 can be connected by a curved surface 153. Connecting the first part 151 and the second part 152 by the curved surface 153 can make the force be transmitted more smoothly between the first part 151 and the second part 152, reduce stress concentration, and improve the structural strength and stability of the lap joint 150.

[0051] In a further technical solution, the curved surface 153 can protrude in a direction away from the first part 210, and the curved surface 153 and the first part 210 are matched in a limiting manner along the direction from the bottom guard plate 100 to the first part 210. That is to say, after the curved surface 153 contacts the first part 210, the first part 210 can block the movement of the bottom guard plate 100 in the direction from the bottom guard plate 100 to the first part 210, thereby improving the positional accuracy of the pre-attached bottom guard plate 100.

[0052] In a further technical solution, the end of the second part 152 facing away from the first part 151 and the curved surface 153 can be raised in a direction away from the first part 210.

[0053] During the pre-attachment of the underbody protection plate 100, the second horizontal edge 120 of the underbody protection plate 100 can be tilted downwards first, and then the underbody protection plate 100 can be gradually pushed towards the rear bumper 200. After the curved surface 153 contacts the first part 210, the second horizontal edge 120 of the underbody protection plate 100 is lifted upwards so that the overlapping piece 150 overlaps the first part 210. The end of the second part 152 is tilted up to facilitate the pre-attachment of the underbody protection plate 100 towards the rear bumper 200.

[0054] In other alternative embodiments, the overlap 150 may also be a flat, plate-like structure.

[0055] In other alternative embodiments, the overlap 150 may include a second portion 152 and a curved surface 153 connected in a bent shape, the curved surface 153 being fixedly connected to the first transverse side 110, the second portion 152 being connected to the curved surface 153 and being fitted and connected to the first portion 210.

[0056] The underbody protection plate 100 may also include a first longitudinal edge 130 and a second longitudinal edge 140 extending longitudinally along the vehicle and located on opposite sides of the underbody protection plate 100. The multiple pre-attached structures also include a first snap-fit ​​structure 160. Both the first longitudinal edge 130 and the second longitudinal edge 140 are provided with the first snap-fit ​​structure 160. The first snap-fit ​​structure 160 can be connected to the underbody protection plate 100 by welding or other means, or it can be integrally formed with the underbody protection plate 100. It should be noted that the longitudinal direction of the vehicle refers to the direction from the front to the rear of the vehicle. When the underbody protection plate 100 is installed on the vehicle, the first longitudinal edge 130 may be the edge facing the right side of the vehicle, and the second longitudinal edge 140 may be the edge facing the left side of the vehicle.

[0057] Multiple vehicle functional components may also include at least two bottom brackets 300, which are located above the first longitudinal edge 130 and the second longitudinal edge 140 respectively. Multiple support structures may include second snap-fit ​​structures. The bottom brackets 300 located above the first longitudinal edge 130 and the second longitudinal edge 140 are all provided with second snap-fit ​​structures, and each first snap-fit ​​structure 160 and each second snap-fit ​​structure are snap-fitted together in a one-to-one correspondence.

[0058] In this case, the first longitudinal edge 130 and the second longitudinal edge 140 are connected to the two bottom brackets 300 respectively by the snap-fit ​​of the first snap-fit ​​structure 160 and the second snap-fit ​​structure, so as to realize the pre-hanging of the first longitudinal edge 130 and the second longitudinal edge 140.

[0059] In addition, the snap-fit ​​mechanism also has the function of positioning the underbody protection plate 100, thereby ensuring that after the underbody protection plate 100 is pre-attached to multiple vehicle functional components, the underbody protection plate 100 is located in the target installation position, preventing the problem of multiple mounting holes on the underbody protection plate 100 being misaligned with multiple mounting holes on the target vehicle components.

[0060] The bottom bracket 300 can be connected to the bumper 200 and the underbody protection plate 100 respectively by bolts. In the vehicle, the bottom bracket 300 can be connected to the rear bumper 200 and the body respectively by bolts, which plays a role in structural reinforcement.

[0061] In an optional embodiment, the first snap-fit ​​structure 160 may include a plurality of, for example, two elastic portions 161. The plurality of elastic portions 161 protrude from the bottom cover plate 100 toward the bottom support 300 and form a deformation space 162. At least one elastic portion 161 has a snap-fit ​​protrusion 163 on its outer wall opposite to the deformation space 162. The second snap-fit ​​structure includes a snap plate 310 and a snap hole 320 provided on the snap plate 310. A portion of the first snap-fit ​​structure 160 passes through the snap hole 320, and the snap-fit ​​protrusion 163 overlaps the surface of the snap plate 310 opposite to the bottom cover plate 100.

[0062] In this structure, the card plate 310 can provide support for the snap-fit ​​protrusion 163, thereby improving the pre-attachment stability of the first longitudinal edge 130 and the second longitudinal edge 140 of the bottom guard plate 100.

[0063] In a further technical solution, the elastic portion 161 with the snap-fit ​​protrusion 163 may also be provided with a hook 164. A gap exists between the snap-fit ​​plate 310 and the bottom cover plate 100, and the hook 164 is located within the gap and hooks onto the surface of the snap-fit ​​plate 310 facing the bottom cover plate 100. In this case, the snap-fit ​​protrusion 163 and the hook 164 abut against two opposite surfaces of the snap-fit ​​plate 310, further improving the connection stability between the bottom cover plate 100 and the bottom support 300.

[0064] During the pre-attaching of the bottom guard plate 100, after the curved surface 153 contacts the first part 210, as the second horizontal edge 120 of the bottom guard plate 100 is lifted upward, the first snap-fit ​​structure 160 aligns with the snap-fit ​​hole 320 and gradually extends into the snap-fit ​​hole 320. Each elastic part 161 and the snap-fit ​​protrusion 163 provided on the elastic part 161 contact the hole wall of the snap-fit ​​hole 320 and are squeezed by the hole wall, deforming in the direction closer to the deformation space 162 to pass through the snap-fit ​​hole 320. After the snap-fit ​​protrusion 163 passes through the snap-fit ​​hole 320, each elastic part 162 rebounds in the direction away from the deformation space, so that the snap-fit ​​block 163 overlaps on the surface of the card plate 310 facing away from the bottom guard plate 100, and the snap hook 164 hooks onto the surface of the card plate 310 facing the bottom guard plate 100, realizing the snap-fit ​​of the first snap-fit ​​structure 160 and the second snap-fit ​​structure.

[0065] To facilitate the insertion of the first snap-fit ​​structure 160 into the snap-fit ​​hole 320, the overall outer contour of the plurality of elastic parts 161 gradually tapers along the snap-fit ​​direction of the first snap-fit ​​structure 160, with the top of the first snap-fit ​​structure 160 (the end furthest from the bottom cover plate 100) having the smallest overall outer contour area. It should be noted that the snap-fit ​​direction of the first snap-fit ​​structure 160 is the direction of movement of the first snap-fit ​​structure 160 during its insertion into the snap-fit ​​hole 320.

[0066] To improve the smoothness of the engagement operation between the first and second engagement structures, the thickness of the engagement protrusion 163 can gradually decrease along the engagement direction of the first engagement structure 160. It should be noted that the thickness direction of the engagement protrusion 163 is the direction from the surface of the engagement protrusion 163 away from the surface of the elastic portion 161 connected to it to the surface of the elastic portion 161 connected to it.

[0067] In other alternative embodiments, the first snap-fit ​​structure 160 may be a snap-fit ​​hole, and the second snap-fit ​​structure may include the elastic part 161, the snap-fit ​​protrusion 163 and the snap hook 164 described above.

[0068] In other alternative embodiments, the first snap-fit ​​structure 160 may also be a tapered protrusion, and the second snap-fit ​​structure may include a snap plate 310 and a snap hole 320. The portion of the tapered protrusion passes through the snap hole 320, and the portion of the tapered protrusion is press-fitted with the snap hole 320 to achieve snap-fit ​​between the first snap-fit ​​structure 160 and the second snap-fit ​​structure.

[0069] The underbody protection plate 100 may also include a second lateral edge 120 extending laterally along the vehicle, with the second lateral edge 120 and the first lateral edge 110 distributed opposite to each other. The second lateral edge 120 may be an edge facing forward of the vehicle. The multiple pre-attachment structures may include push pins 170 disposed on the second lateral edge 120, and the push pins 170 passing through the underbody protection plate 100. The multiple vehicle functional components may include a body bracket 400 located above the underbody protection plate 100. The multiple support structures may include connection holes formed in the body bracket 400, with the push pins 170 inserted into the connection holes, thereby connecting the second lateral edge 120 of the underbody protection plate 100 to the body bracket 400, realizing the pre-attachment of the second lateral edge 120.

[0070] During the pre-hanging of the bottom guard plate 100, after the overlapping piece 150 is overlapped with the first part 210 and the first snap-fit ​​structure 160 is snapped into the second snap-fit ​​structure, the push pin 170 is pushed into the connection hole to complete the pre-hanging of the bottom guard plate 100.

[0071] It should be noted that the structure of the push pin 170 and the fit between the push pin and the connecting hole are existing technologies, and will not be described in detail here.

[0072] Based on the aforementioned underbody protection pre-attachment system, this application embodiment also provides a vehicle, which can be an electric vehicle, a fuel-powered vehicle, or a hybrid vehicle, etc. This vehicle includes the aforementioned underbody protection pre-attachment system. Since this vehicle has the aforementioned underbody protection pre-attachment system, the beneficial effects brought by the underbody protection pre-attachment system are described above and will not be repeated here.

[0073] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0074] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0075] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0076] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0077] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0078] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A bottom guard plate pre-hanging system, characterized in that, include: The bottom guard plate (100) is surrounded by multiple guard plate edges in its circumference. The bottom guard plate (100) is provided with multiple pre-hanging structures, which are distributed on the multiple guard plate edges. Multiple vehicle functional components have multiple support structures, which are distributed on the multiple vehicle functional components. Multiple pre-attachment structures are connected to the multiple support structures to pre-attach the bottom guard plate (100) to the multiple vehicle functional components.

2. The bottom guard plate pre-hanging system according to claim 1, characterized in that, The plurality of guard plate edges include a first transverse edge (110) extending laterally along the vehicle, and the plurality of pre-attached structures include an overlap member (150) disposed on the first transverse edge (110). The plurality of vehicle functional components include a rear bumper (200), the rear bumper (200) including a first portion (210) adjacent to the first lateral side (110), the plurality of support structures including the first portion (210), and at least a portion of the connector (150) overlapping the first portion (210).

3. The bottom guard plate pre-hanging system according to claim 2, characterized in that, The lap joint (150) includes a first part (151) and a second part (152) connected in a bent shape. The first part (151) is fixedly connected to the first horizontal side (110), and the second part (152) is fitted and connected to the first part (210).

4. The bottom guard plate pre-hanging system according to claim 3, characterized in that, The first portion (151) and the second portion (152) are connected by a curved surface (153) that protrudes away from the first portion (210) and, along the direction from the bottom guard plate (100) to the first portion (210), the curved surface (153) engages with the first portion (210); and / or, The end of the second part (152) facing away from the first part (151) is raised in a direction away from the first part (210).

5. The bottom guard plate pre-hanging system according to claim 1 or 2, characterized in that, The plurality of guard plate edges include a first longitudinal edge (130) and a second longitudinal edge (140) extending longitudinally along the vehicle and located on opposite sides of the bottom guard plate (100), and the plurality of pre-attached structures include a first snap-fit ​​structure (160), and both the first longitudinal edge (130) and the second longitudinal edge (140) are provided with the first snap-fit ​​structure (160). The plurality of vehicle functional components include at least two bottom brackets (300), the at least two bottom brackets (300) being located above the first longitudinal edge (130) and the second longitudinal edge (140) respectively. The plurality of support structures include second snap-fit ​​structures. The bottom brackets (300) located above the first longitudinal edge (130) and the second longitudinal edge (140) are all provided with the second snap-fit ​​structures. Each first snap-fit ​​structure (160) and each second snap-fit ​​structure are snap-fitted together in a one-to-one correspondence.

6. The bottom guard plate pre-hanging system according to claim 5, characterized in that, The first snap-fit ​​structure (160) includes a plurality of elastic parts (161), which protrude from the bottom cover plate (100) toward the bottom support (300) and form a deformation space (162). At least one of the elastic parts (161) has a snap-fit ​​protrusion (163) on its outer wall facing away from the deformation space (162). The second snap-fit ​​structure includes a snap-fit ​​plate (310) and a snap-fit ​​hole (320) provided on the snap-fit ​​plate (310). A portion of the first snap-fit ​​structure (160) passes through the snap-fit ​​hole (320), and the snap-fit ​​protrusion (163) overlaps the surface of the snap-fit ​​plate (310) facing away from the bottom guard plate (100).

7. The bottom guard plate pre-hanging system according to claim 6, characterized in that, The elastic part (161) with the snap-fit ​​protrusion (163) is also provided with a snap hook (164). There is a gap between the snap plate (310) and the bottom guard plate (100). The snap hook (164) is located in the gap and hooks onto the surface of the snap plate (310) facing the bottom guard plate (100).

8. The bottom guard plate pre-hanging system according to claim 6, characterized in that, Along the snapping direction of the first snapping structure (160), the overall outer contour of the plurality of elastic parts (161) gradually decreases.

9. The bottom guard plate pre-hanging system according to claim 1 or 2, characterized in that, The plurality of guard plate edges include a second transverse edge (120) extending laterally along the vehicle, and the plurality of pre-attached structures include push pins (170) disposed on the second transverse edge (120); The plurality of vehicle functional components include a body bracket (400) located above the underbody protection plate (100), and the plurality of support structures include a connecting hole provided in the body bracket (400), and the push pin (170) is inserted into the connecting hole so that the second transverse edge (120) is connected to the body bracket (400).

10. A vehicle, characterized in that, Includes the bottom guard plate pre-attachment system as described in any one of claims 1-9.

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