A lower vehicle body and a vehicle

Abstract

The utility model relates to vehicle body technology field discloses a lower car body and vehicle, and lower car body includes front floor assembly, and front floor assembly includes: front floor subassembly, at least two crossbeams are spaced apart to set up on front floor subassembly along the first direction, and crossbeam has the top surface, at least two groups of support are connected with at least two crossbeams respectively, and support is used to install front seat, and support is installed on the top surface, wherein, support includes top wall and side wall, and side wall is provided with opening, and the side portion of opening is provided with first extension part, and first extension part is closed opening after bending, in the scheme of the utility model, because the setting of opening, therefore, support can release stress when processing, even if support setting is higher, also can not produce bigger stress in corner position again, make support have higher structural strength, guarantee the fixed stability of front row seat.

Description

Technical Field

[0001] This utility model relates to the field of vehicle body technology, specifically to a lower body and a vehicle. Background Technology

[0002] With the diversification of the automotive market, different vehicle types (such as sedans, SUVs, and MPVs) have significantly different requirements for cabin layout, passenger space, and seat posture. In traditional vehicle body structures, the front seats are often fixedly connected to the crossbeam of the front floor assembly via a bracket. The bracket is typically a basin-shaped structure with a top wall and side walls. The bottom wall is connected to the crossbeam by a flange, and the top wall is connected to the front seat by fasteners. Furthermore, the bracket is formed by stamping a single sheet of metal.

[0003] When vehicle models change (such as with increased wheelbase or adjusted cabin space) or seat functions are upgraded (such as requiring a longer fore-and-aft sliding range), the position of the front seats relative to the front floor assembly changes. To reduce costs and shorten development cycles, existing technologies typically do not alter the structure of the front floor assembly, but rather change the relative position of the front seats by modifying the size or position of the brackets. However, when the seat position is raised, the depth of the brackets increases, leading to increased stress at the corners of the basin-shaped structure during stamping. This can cause component breakage during manufacturing and, during subsequent use, the corners of the brackets are prone to cracking due to vehicle vibrations, resulting in failure of the front seat's fixation. Utility Model Content

[0004] One objective of this utility model is to provide a lower body and vehicle to solve the problem that the strength of the front seat bracket in the prior art cannot adapt to the seat height of different models, and the parts are prone to breakage and cracking; the second objective is to provide a vehicle.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A vehicle body includes a front floor assembly, comprising: a front floor component; at least two crossbeams spaced apart on the front floor component along a first direction; each crossbeam having a top surface; at least two sets of brackets respectively connected to the at least two crossbeams; brackets for mounting front seats; the brackets are mounted on the top surface, wherein each bracket includes a top wall and a side wall, the side wall having an opening, and a first extension portion having a side portion of the opening, the first extension portion being bent to close the opening. According to the above technical means, the bracket has an opening on its side wall, and the opening has an extension portion. By bending the extension portion to close the opening, the structural integrity of the bracket is ensured. Due to the opening, stress can be released during the manufacturing process of the bracket, and even if the bracket is set high, no large stress will be generated at the corner positions, giving the bracket high structural strength and ensuring the fixed stability of the front seats.

[0007] Furthermore, a first extension is provided on both sides of the opening, and the two first extensions are bent in opposite directions and at least partially overlap, and the overlapping parts of the two first extensions are connected together.

[0008] According to the above-mentioned technical means, by setting two first extensions and bending the two first extensions to connect the overlapping parts together, the overall strength of the bracket can be enhanced.

[0009] Furthermore, each of the two opposite sides of the sidewall has an opening, and each of the two openings has a first extension; and / or, the top of the opening has a second extension, which bends downward and covers the first extension, and the second extension is used to connect with the side of the crossbeam.

[0010] According to the above-mentioned technical means, by setting openings on opposite sides of the sidewall, the bracket can be formed by bending the sheet material without the need for stamping, which makes the structural strength of the bracket higher. At the same time, a second extension is set, which can enhance the structural strength of the bracket at the opening, and the second extension is used to connect with the crossbeam.

[0011] Furthermore, the system includes a rear floor assembly comprising: a first rear floor section, one end of which is connected to a front floor assembly along a first direction; a support including a raised portion and a first overlapping edge extending around the raised portion; the raised portion for mounting a rear seat, at least a portion of the structure of the first overlapping edge being connected to the first rear floor section; the raised portion projecting in a direction away from the first rear floor section along a height direction; the projecting height of the raised portion relative to the first overlapping edge being adjustable; and / or, the tilt angle of the surface of the raised portion away from the first rear floor section relative to a horizontal plane perpendicular to the height direction being adjustable.

[0012] Based on the aforementioned technical means, by designing the support of the rear floor assembly as a structure including a raised portion and a first overlapping edge, and by setting the protrusion height of the raised portion relative to the first overlapping edge to be adjustable, the support can adapt to the rear seat installation height requirements of different vehicle models; by making the tilt angle of the raised portion away from the surface of the first rear floor section adjustable, the support can adapt to the rear seat tilt posture requirements of different vehicle models, avoiding the problem of having to redesign the rear floor assembly due to changes in rear seat installation requirements, improving the versatility of the rear floor assembly, and further reducing development costs.

[0013] Furthermore, the rear floor assembly includes a second rear floor section, the second rear floor section including a second overlap edge and a first extension; along a first direction, the second overlap edge is connected to the end of the first rear floor section away from the front floor assembly; the first extension is dimensionally adjustable along the first direction.

[0014] According to the above-mentioned technical means, by setting the first extension of the second rear floor section to be adjustable in the first direction, the rear overhang length of the vehicle can be changed, so that the rear floor assembly can adapt to the needs of different models with varying rear overhang lengths, thereby enhancing the versatility of the rear floor assembly and shortening the development cycle.

[0015] Furthermore, the rear floor assembly includes two first side beams; the two first side beams are respectively connected to both sides of the second rear floor section along the second direction, and the first side beams are connected to the first rear floor section; the dimensions of the first side beams along the first direction are adjustable; the second direction is perpendicular to the first direction and the height direction.

[0016] According to the above technical means, by setting the size of the first side beam along the first direction to be adjustable, the length of the first side beam along the first direction can be matched with the length of the first rear floor section and the second rear floor section, so as to ensure the structural strength of the rear floor assembly.

[0017] Furthermore, the front floor assembly includes a first front floor section and a second front floor section; along the first direction, the second front floor section includes a third overlapping edge, a second extension section and a fourth overlapping edge connected in sequence; the third overlapping edge is connected to the first front floor section and the fourth overlapping edge is connected to the first rear floor section; the size of the second extension section along the first direction is adjustable.

[0018] Based on the above technical means, by designing the second front floor section of the front floor assembly as a structure including a second extension section, and setting the size of the second extension section to be adjustable along the first direction, the front floor assembly can adapt to the needs of different vehicle models with varying wheelbase lengths, thereby enhancing the versatility of the front floor assembly and reducing development costs.

[0019] Furthermore, the front floor assembly includes two second side beams; the two second side beams are respectively connected to both sides of the second front floor section along the second direction, and are respectively connected to both sides of the first front floor section along the second direction; the dimensions of the second side beams along the first direction are adjustable; and / or, the dimensions of the second side beams along the second direction are adjustable.

[0020] Based on the aforementioned technical means, by making the dimensions of the second side beam adjustable along the first direction, the length of the second side beam along the first direction can be matched with the lengths of the first and second front floor sections, thereby ensuring the structural strength of the front floor assembly. By making the dimensions of the second side beam adjustable along the second direction, the front floor assembly can adapt to the varying widths of different vehicle models, improving the versatility and adaptability of the front floor assembly and shortening the development cycle.

[0021] Furthermore, it includes a front compartment assembly, which includes a front compartment frame, an energy-absorbing box, and a front collision beam. Along a first direction, the energy-absorbing box is connected between the front compartment frame and the front collision beam. The end of the front compartment frame away from the front collision beam is connected to the front floor assembly. The size of the energy-absorbing box is adjustable along the first direction.

[0022] Based on the above technical means, by setting the size of the energy-absorbing box to be adjustable along the first direction, the front compartment assembly can adapt to the needs of different vehicle models with varying front suspensions, thereby enhancing the versatility of the front compartment assembly and reducing development costs.

[0023] A vehicle comprising the aforementioned undercarriage.

[0024] The beneficial effects of this utility model are:

[0025] By providing openings with extensions on the side walls of the bracket, and then closing the openings by bending the extensions, the structural integrity of the bracket is ensured. Due to the openings, stress can be released during the bracket's manufacturing process. Even if the bracket is set high, significant stress will not occur at the corners, resulting in high structural strength and ensuring the stability of the front seats. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the lower body of this utility model;

[0027] Figure 2 This is a structural schematic diagram of the front cabin assembly of this utility model;

[0028] Figure 3 This is a schematic diagram of the front floor assembly of this utility model;

[0029] Figure 4 This is a partial enlarged view of the front floor assembly of this utility model;

[0030] Figure 5 This is a sectional view of the bracket and crossbeam of this utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the second side beam and the second front floor section overlapping in this utility model;

[0032] Figure 7 This is a structural schematic diagram of the rear floor assembly of this utility model;

[0033] Figure 8 This is a cross-sectional view of the support and the first rear floor section of this utility model.

[0034] Figure 9 for Figure 1 A three-dimensional schematic diagram of the support bracket on the middle and rear crossbeam;

[0035] Figure 10 for Figure 9 A three-dimensional view from the other side of the central support;

[0036] Figure 11 for Figure 9Top view of the central support structure;

[0037] Figure 12 for Figure 1 A three-dimensional schematic diagram of the support bracket on the front crossbeam;

[0038] Figure 13 for Figure 12 A three-dimensional view from the other side of the central support;

[0039] Figure 14 for Figure 12 A top view of the central support structure.

[0040] The components are labeled as follows: 1. Front compartment assembly; 11. Front compartment frame; 12. Energy absorption box; 13. Front collision beam;

[0041] 2. Front floor assembly; 21. Front floor component; 211. First front floor section; 212. Second front floor section; 2121. Third overlapping edge; 2122. Second extension section; 2123. Fourth overlapping edge; 213. Second side beam; 22. Crossbeam; 221. Top surface; 23. Bracket; 231. Top wall; 232. Side wall; 233. Opening; 234. First extension; 235. Second extension;

[0042] 3. Rear floor assembly; 31. First rear floor section; 32. Support; 321. Raised portion; 322. First lap edge; 33. Second rear floor section; 331. Second lap edge; 332. First extension section; 34. First side beam;

[0043] X, first direction; Y, second direction; Z, altitude direction. Detailed Implementation

[0044] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0045] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0046] This embodiment proposes an underbody, such as Figures 1-8 As shown, the lower body includes a front compartment assembly 1, a front floor assembly 2, and a rear floor assembly 3 connected sequentially along a first direction X. The first direction X is also the longitudinal direction of the vehicle, and it is perpendicular to the vertical direction Z and the lateral direction Y of the vehicle.

[0047] Specifically, the front floor assembly 2 includes a front floor component 21, at least two crossbeams 22, and at least two sets of brackets 23. The at least two crossbeams 22 are spaced apart on the front floor component 21 along a first direction X. Each crossbeam 22 has a top surface 221. Specifically, the crossbeams 22 can be mounted on the front floor component 21 by welding, bolting, riveting, or other methods, and the crossbeams 22 can be positioned above the front floor component 21; alternatively, the crossbeams 22 can be integrally formed with the front floor component 21.

[0048] Furthermore, at least two sets of brackets 23 are respectively connected to at least two crossbeams 22. The brackets 23 are used to install the front seat and are mounted on the top surface 221. The brackets 23 can be installed on the top surface 221 by welding, riveting, bolting, or other methods. This invention does not specifically limit the number of brackets 23 in each set; each set of brackets 23 can be one, two, three, four, or other quantities. It should be noted that the structures of the brackets 23 in the two sets of brackets 23 can be the same or different, as long as the seat installation function is achieved.

[0049] Furthermore, along the first direction X, the dimensions of the top surface 221 are larger than the dimensions of the bracket 23. Along the first direction X, the bracket 23 is adapted to be installed at different positions on the top surface 221.

[0050] In this embodiment, by installing the bracket 23 on the top surface 221 of the crossbeam 22 and setting the size of the top surface 221 along the first direction X to be larger than the size of the bracket 23, the bracket 23 can be installed at different positions on the top surface 221 along the first direction X, so as to provide suitable installation points for front seats of different vehicle models, improve the adaptability of the front floor assembly 2 to the installation positions of different vehicle models, enhance the versatility of the lower body, and reduce the development cost and cycle of redesigning the crossbeam 22 or the front floor structure due to changes in vehicle models.

[0051] Furthermore, in some embodiments, the bracket 23 includes a top wall 231 and a side wall 232. The top wall 231 is used to mount the front seat. The top of the side wall 232 is connected to the top wall 231 and extends around the top wall 231; the bottom of the side wall 232 is connected to the top surface 221. The top wall 231 and the side wall 232 can be integrally formed, or they can be connected as a single structure by welding, bolting, or other methods; preferably, they are integrally formed.

[0052] The specific structure of the bracket 23 is described below.

[0053] like Figures 9 to 14 As shown, the sidewall 232 is further provided with an opening 233, and a first extension 234 is provided on the side of the opening 233. The first extension 234 is bent to close the opening 233.

[0054] Specifically, in this embodiment, the sidewall 232 of the bracket 23 is not directly machined into a closed annular structure, but has an opening 233. By providing the opening 233, the stress generated during the machining of the bracket 23 can be released at the opening 233. Even if the position of the front seat is adjusted to be higher in different vehicle models, resulting in an increase in the depth of the bracket 23, due to the provision of the opening 233, no large stress will be generated at the corner positions of the bracket 23 during the machining process, thus ensuring that the bracket 23 has high structural strength.

[0055] from Figure 9 and Figure 10 As can be seen, a first extension 234 is provided on the side of the opening 233, that is, the sidewall 232 extends a certain distance at the position of the opening 233, and this extended distance forms the first extension 234. By bending the first extension 234, it can cover the opening 233, thereby ensuring the integrity of the bracket 23 and the overall structural strength.

[0056] The bending of the first extension 234 mentioned above refers to the bending of the first extension 234 in the horizontal plane.

[0057] like Figure 10 As shown, in the technical solution of this embodiment, a first extension 234 is provided on both sides of the opening 233. After the two first extensions 234 are bent in opposite directions, they overlap at least partially, and the overlapping portions of the two first extensions 234 are connected together.

[0058] Specifically, the two first extensions 234 are arranged opposite to each other. During processing, the two first extensions 234 are bent in the direction they face each other, and then overlapped, so that there is an overlapping portion between them. The overlapping portion of the two first extensions 234 is connected and fixed to form the bracket 23 structure.

[0059] In this embodiment, two first extensions 234 are provided, which can further enhance the structural strength of the bracket 23.

[0060] The overlapping portions of the two first extensions 234 can be connected by welding, fasteners, or other means.

[0061] In some embodiments not shown, a first extension 234 may be provided only on one side of the opening 233. In this case, the first extension 234 is relatively long, allowing it to bend and extend to the side wall 232. Then, the free end of the first extension 234 can be connected to the side wall 232. The connection method between the first extension 234 and the side wall 232 can be welding, fastener connection, etc.

[0062] like Figure 10 and Figure 11 , Figure 13 and Figure 14 As shown, in the technical solution of this embodiment, openings 233 are provided on two opposite sides of the sidewall 232, and a first extension 234 is provided on each of the two openings 233. Specifically, the two openings 233 of the bracket 23 are arranged opposite to each other, and a first extension 234 is provided on both sides of each opening 233. The two first extensions 234 on each opening 233 are bent in opposite directions so that the overlapping parts are connected together.

[0063] Reference Figure 9 and Figure 10 As those skilled in the art will understand, this type of bracket can be formed by bending a metal sheet of a specific shape, eliminating the need for stamping and significantly reducing processing stress. Even if the height of the front seats results in a greater depth of the bracket 23, the bracket 23 still possesses high structural strength.

[0064] like Figure 9 and Figure 12 As shown, a second extension 235 is provided at the top of the opening 233. The second extension 235 bends downward and covers the first extension 234. The second extension 235 is used to connect with the crossbeam 22. Specifically, the top wall 231 extends a certain distance at the location of the opening 233, and this extended portion forms the second extension 235. After bending downward, the second extension 235 covers the outside of the first extension 234. The second extension 235 can further enhance the structural strength of the support 23 at the opening 233, and the second extension 235 is used to connect with the crossbeam 22.

[0065] Combination Figure 4 ,as well as Figures 9 to 14 As shown, Figure 4 Two crossbeams 22 are shown in the figure, among which Figures 9 to 11 The structure of the bracket 23 (referred to as the rear bracket) on the rear crossbeam 22 is shown. Figures 12 to 14 The structure of the bracket 23 (referred to as the front bracket) on the rear crossbeam 22 is shown.

[0066] Furthermore, the front and rear supports have essentially the same structure, with two main differences. First, the shapes and dimensions of their top walls 231 and side walls 232 are different. Second, the front support is positioned at the edge of the crossbeam 22, therefore its second extension 235 extends directly downwards and protrudes below the lower edge of the side wall 232, engaging with the side of the crossbeam 22. The rear support is positioned in the middle of the crossbeam 22, therefore its lower part has a flange, which connects to the top surface of the crossbeam 22.

[0067] In addition, the lower edge of the side wall 232 of both the front and rear supports is provided with a flange, which is connected to the top surface of the crossbeam 22.

[0068] For example, such as Figure 5 As shown, the top wall 231 of the bracket 23 is provided with a process hole. Taking the central axis of the process hole as a reference, along the first direction X, the bracket 23 can be adjusted back and forth on the crossbeam 22 to a position L1, where 0≤L1≤100mm. It should be noted that in the two sets of brackets 23, the back and forth adjustment positions of the brackets 23 can be the same or different, and can be adaptively adjusted according to the installation requirements of the seat.

[0069] Furthermore, in some embodiments, the dimension of the side wall 232 along the height direction Z is adjustable for different vehicle models. The height direction Z is perpendicular to the first direction X. In this embodiment, by designing the bracket 23 as a structure including a top wall 231 and a side wall 232, and setting the dimension of the side wall 232 along the height direction Z to be adjustable, the bracket 23 can adapt to the different vehicle models' requirements for front seat installation height, such as the difference in seat height between low-chassis sedans and high-chassis SUVs. This avoids the need to redesign the crossbeam 22 or the front floor structure due to changes in seat height, further improving the versatility and development efficiency of the front floor assembly 2.

[0070] For example, such as Figure 5 As shown, taking the upper surface of the top wall 231 of the bracket 23 as a reference, the height of the bracket 23 along the height direction Z can be adjusted up and down by H1, where 0≤H1≤50mm. It should be noted that in the two sets of brackets 23, the height adjustment of the brackets 23 can be the same or different, and can be adapted to the installation requirements of the seat.

[0071] For example, such as Figure 4 As shown, a bracket 23 part is provided at the end of the side wall 232 of the bracket 23 away from the top wall 231. The bracket 23 part is attached to and connected to the top surface 221 or the side surface of the crossbeam 22, for example, by welding, bolt connection or other means.

[0072] Furthermore, in some embodiments, the tilt angle of the top wall 231 relative to the horizontal plane perpendicular to the height direction Z is adjustable for different vehicle models. In this embodiment, by setting the tilt angle of the top wall 231 relative to the horizontal plane perpendicular to the height direction Z to be adjustable, the bracket 23 can adapt to the different requirements of different vehicle models for the tilt posture of the front seats, such as the difference between the need for support in sports seats and the need for a smooth ride in comfort seats. This avoids the problem of having to redesign the crossbeam 22 or adjust the front floor structure due to changes in seat posture, enhances the compatibility of the front floor assembly 2 with seat posture, and reduces development costs.

[0073] It should be noted that the present invention does not specifically limit the tilt angle of the top wall 231. The top wall 231 can be parallel to the horizontal plane perpendicular to the height direction Z, or it can be at an acute angle, as long as it can meet the installation requirements of the seat posture.

[0074] Furthermore, in some embodiments, such as Figure 7 and Figure 8 The rear floor assembly 3 includes a first rear floor section 31 and a support 32. One end of the first rear floor section 31 is connected to the front floor assembly 21 along a first direction X. The support 32 includes a raised portion 321 and a first overlapping edge 322 extending around the raised portion 321. The raised portion 321 is used to mount a rear seat. At least a portion of the structure of the first overlapping edge 322 is connected to the first rear floor section 31. Along the height direction Z, the raised portion 321 protrudes away from the first rear floor section 31.

[0075] For example, the first rear floor section 31 can be integrally molded, such as an integral casting, to meet the load-bearing requirements of the rear floor assembly 3.

[0076] For example, the entire structure of the first overlapping edge 322 is connected to the first rear floor section 31; or, the first rear floor section 31 is connected to the front floor assembly 21, and part of the structure of the first overlapping edge 322 is connected to the first rear floor section 31, and part of the structure is connected to the front floor assembly 21. For example, the first overlapping edge 322 can be attached to and fixedly connected to the first rear floor section 31 and / or the front floor assembly 21, specifically by welding, bolting, riveting, etc., preferably by welding.

[0077] For example, there may be one support 32, or multiple supports may be arranged side by side or at intervals along the second direction Y, or multiple supports may be arranged side by side or at intervals along the first direction X, as long as the installation requirements of the rear seat are met. The second direction Y is the left-right direction of the vehicle, and the second direction Y is perpendicular to the first direction X and the height direction Z.

[0078] In some embodiments, the protrusion height of the raised portion 321 relative to the first overlapping edge 322 is adjustable for different vehicle models. In this embodiment, by designing the support 32 of the rear floor assembly 3 to include a structure with a raised portion 321 and a first overlapping edge 322, and by setting the protrusion height of the raised portion 321 relative to the first overlapping edge 322 to be adjustable, the support 32 can adapt to the rear seat installation height requirements of different vehicle models, thereby improving the versatility of the rear floor assembly 3 and further reducing development costs.

[0079] In some embodiments, the tilt angle of the raised portion 321 away from the surface of the first rear floor section 31 relative to a horizontal plane perpendicular to the height direction Z is adjustable. In this embodiment, by making the tilt angle of the raised portion 321 away from the surface of the first rear floor section 31 adjustable, the support 32 can adapt to the rear seat tilt posture requirements of different vehicle models, avoiding the problem of having to redesign the rear floor assembly 3 due to changes in rear seat installation requirements, improving the versatility of the rear floor assembly 3, and further reducing development costs.

[0080] It should be noted that the structure and dimensions of the first overlapping edge 322 remain unchanged for different vehicle models. That is, the overlapping structure between the support 32 and the first rear floor section 31 and the front floor assembly 21 remains unchanged, which facilitates rapid assembly and improves production efficiency.

[0081] Furthermore, in some embodiments, the rear floor assembly 3 further includes a second rear floor section 33, which includes a second overlapping edge 331 and a first extension section 332. Along the first direction X, the second overlapping edge 331 is connected to the end of the first rear floor section 31 that is away from the front floor assembly 21. The second overlapping edge 331 can be fitted and fixedly connected to the first rear floor section 31, specifically through welding, bolting, riveting, etc., preferably welding.

[0082] In some embodiments, the dimensions of the first extension 332 along the first direction X are adjustable for different vehicle models. In this embodiment, by making the dimensions of the first extension 332 of the second rear floor section 33 adjustable along the first direction X, the rear overhang length of the vehicle can be changed, enabling the rear floor assembly 3 to adapt to the needs of different vehicle models with varying rear overhang lengths, thereby enhancing the versatility of the rear floor assembly 3 and shortening the development cycle.

[0083] For example, the length of the first extension segment 332 that is extended or shortened along the first direction X is L2, that is, the adjustable range of the rear overhang length is L2, 0≤L2≤350mm.

[0084] It should be noted that the structure and dimensions of the second overlapping edge 331 remain unchanged for different vehicle models, that is, the overlapping structure between the second rear floor section 33 and the first rear floor section 31 remains unchanged, which facilitates rapid assembly and improves production efficiency.

[0085] Furthermore, in some embodiments, the rear floor assembly 3 includes two first side beams 34. The two first side beams 34 are respectively connected to both sides of the second rear floor section 33 along the second direction Y, and the first side beams 34 are connected to the first rear floor section 31, such as by welding, riveting, bolting, etc. For different vehicle models, the dimensions of the first side beams 34 along the first direction X are adjustable. Understandably, the first side beams 34 can extend or shorten synchronously along the first direction X with the first extension section 332. In this embodiment, by making the dimensions of the first side beams 34 adjustable along the first direction X, the length of the first side beams 34 along the first direction X can match the lengths of the first rear floor section 31 and the second rear floor section 33, thereby ensuring the structural strength of the rear floor assembly 3.

[0086] It should be noted that, for different vehicle models, the cross-sectional shape of the first side beam 34 along the height direction Z remains unchanged. That is, the overlapping structure of the first side beam 34 with the first rear floor section 31 and the second rear floor section 31 remains unchanged, which facilitates rapid assembly and improves production efficiency. For example, the cross-sectional shape of the first side beam 34 along the height direction Z can be rectangular, "L" shaped, etc.

[0087] Furthermore, in some embodiments, the front floor assembly 21 includes a first front floor section 211 and a second front floor section 212. The first front floor section 211 is connected to the aforementioned front compartment assembly 1, and the second front floor section 212 is connected to the aforementioned first rear floor section 31. Specifically, along the first direction X, the second front floor section 212 includes a third overlapping edge 2121, a second extension section 2122, and a fourth overlapping edge 2123 connected in sequence. The third overlapping edge 2121 is connected to the first front floor section 211, and the fourth overlapping edge 2123 is connected to the first rear floor section 31, for example, by welding, riveting, bolting, or other methods.

[0088] In some embodiments, the second extension 2122 is adjustable in size along the first direction X to accommodate different vehicle models. In this embodiment, by designing the second front floor section 212 of the front floor assembly 21 to include the second extension 2122 and making the second extension 2122 adjustable in size along the first direction X, the front floor assembly 2 can adapt to the needs of different vehicle models with varying wheelbase lengths, thereby enhancing the versatility of the front floor assembly 2 and reducing development costs.

[0089] For example, the length of the second extension segment 2122 that is extended or shortened along the first direction X is L3, that is, the adjustable range of the wheelbase length is L3, 0≤L3≤250mm.

[0090] It should be noted that the structure and dimensions of the third overlapping edge 2121 and the fourth overlapping edge 2123 remain unchanged for different vehicle models. That is, the overlapping structure between the second front floor section 212 and the first front floor section 211 and the first rear floor section 31 remains unchanged, which facilitates rapid assembly and improves production efficiency.

[0091] Furthermore, in some embodiments, the front floor assembly 21 includes two second side beams 213. The two second side beams 213 are respectively connected to both sides of the second front floor section 212 along the second direction Y, and are respectively connected to both sides of the first front floor section 211 along the second direction Y, for example, by welding, riveting, bolting or other methods.

[0092] For example, the second side beam 213 has a fifth overlapping edge on the side near the first front floor section 211 and the second front floor section 212. The first front floor section 211 and the second front floor section 212 can both overlap on the fifth overlapping edge and be welded to the fifth overlapping edge.

[0093] In some embodiments, the dimensions of the second side beam 213 along the first direction X are adjustable for different vehicle models. Understandably, the second side beam 213 can be extended or shortened synchronously along the first direction X with the second extension section 2122. In this embodiment, by making the dimensions of the second side beam 213 along the first direction X adjustable, the length of the second side beam 213 along the first direction X can match the lengths of the first front floor section 211 and the second front floor section 212, thereby ensuring the structural strength of the front floor assembly 2.

[0094] In some embodiments, the dimensions of the second side beam 213 along the second direction Y are adjustable to suit different vehicle models. In this embodiment, by making the dimensions of the second side beam 213 adjustable along the second direction Y, the front floor assembly 21 can adapt to the needs of different vehicle width variations, thereby improving the versatility and adaptability of the front floor assembly 21 and shortening the development cycle.

[0095] For example, the cross-sectional shape of the second longitudinal beam along the height direction Z includes a frame structure, and the dimension of the second side beam 213 along the second direction Y can be changed by increasing the dimension of the frame structure along the second direction Y. It is understood that the cross-sectional shape of the second longitudinal beam along the height direction Z can also be constructed as a "U" shape, an "L" shape, or other regular or irregular shapes.

[0096] For example, the second side beam 213 can be adjusted by a dimension of W along the second direction Y, that is, the adjustable dimension of the vehicle width is W, 0≤W≤80mm.

[0097] It should be noted that the overlapping structure of the second side beam 213 with the first front floor section 211 and the second front floor section 212 remains unchanged for different vehicle models. For example, the second side beam 213 includes the aforementioned fifth overlapping edge, and the shape and structure of the fifth overlapping edge remain unchanged to facilitate rapid assembly and improve production efficiency.

[0098] Furthermore, in some embodiments, the front compartment assembly 1 includes a front compartment frame 11, an energy-absorbing box 12, and a front collision beam 13. Along the first direction X, the energy-absorbing box 12 is connected between the front compartment frame 11 and the front collision beam 13. The end of the front compartment frame 11 away from the front collision beam 13 is connected to the front floor assembly 21, specifically to the aforementioned first front floor section 211, such as by welding, riveting, bolting, or other methods.

[0099] For example, the front cabin frame 11 can be a frame structure with an opening, specifically, the front cabin frame 11 has an opening at one end near the front collision beam 13. The front cabin frame 11 includes two longitudinal beams located at the opening and arranged parallel to each other along the second direction Y. Two energy-absorbing boxes 12 can be provided, and the two energy-absorbing boxes 12 are respectively connected between the two longitudinal beams and the front collision beam 13.

[0100] In some embodiments, the size of the energy-absorbing box 12 along the first direction X is adjustable for different vehicle models. In this embodiment, by making the size of the energy-absorbing box 12 adjustable along the first direction X, the front compartment assembly 1 can adapt to the needs of different vehicle models with varying front suspensions, thereby enhancing the versatility of the front compartment assembly 1 and reducing development costs.

[0101] For example, the energy-absorbing box 12 can be extended or shortened along the first direction X by a dimension of L4, that is, the adjustable range of the front overhang length is L4, 0≤L4≤350mm. It should be noted that, generally speaking, for vehicles with larger vehicle dimensions, the overall vehicle load will also increase, which will put more stringent demands on the vehicle body performance. Extending the dimension of the energy-absorbing box 12 along the first direction X can not only meet the requirements of the increased vehicle body size, but also make collision energy absorption more efficient.

[0102] It should be noted that, for different vehicle models, the cross-sectional dimensions of the energy-absorbing box 12 along the height direction Z remain unchanged. That is, the overlapping structure of the energy-absorbing box 12 with the front compartment frame 11 and the front collision beam 13 remains unchanged, in order to facilitate rapid assembly and improve production efficiency. This utility model does not limit the cross-sectional dimensions of the energy-absorbing box 12; it can be rectangular, trapezoidal, circular, etc., as long as it can have the function of absorbing collision energy.

[0103] This embodiment also proposes a vehicle, which includes a lower body as described in any of the above embodiments, an upper body mounted on the lower body, and other vehicle components. In this embodiment, by employing the aforementioned lower body, the vehicle can be modularly designed to adapt to the differentiated requirements of different vehicle models for cabin layout (such as seat position and posture), wheelbase, and front compartment length, thereby quickly enabling the evolution of different posture vehicle models, improving the commonality rate of platform parts, and shortening the overall vehicle development cycle.

[0104] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.

Claims

1. A lower car body, characterized by, Includes a front floor assembly (2), said front floor assembly (2) comprising: Front floor assembly (21); At least two crossbeams (22) are spaced apart along a first direction (X) on the front floor assembly (21); the crossbeams (22) have a top surface (221); At least two sets of brackets (23) are respectively connected to the at least two crossbeams (22); the brackets (23) are used to install the front seats; the brackets (23) are mounted on the top surface (221). The bracket includes a top wall (231) and a side wall (232). The side wall (232) is provided with an opening (233). A first extension (234) is provided on the side of the opening (233). The first extension (234) is bent to close the opening (233).

2. The lower car body according to claim 1, characterized in that The opening (233) is provided with the first extension (234) on both sides. The two first extensions (234) are bent in opposite directions and overlap at least partially. The overlapping parts of the two first extensions (234) are connected together.

3. The lower car body according to claim 1, characterized in that The sidewall (232) has openings (233) on both opposite sides, and each of the two openings (233) has the first extension (234); and / or, The top of the opening (233) is provided with a second extension (235), which bends downward and covers the first extension (234). The second extension (235) is used to connect with the crossbeam (22).

4. The lower car body according to any one of claims 1 to 3, characterized in that, Includes a rear floor assembly (3), said rear floor assembly (3) comprising: A first rear floor segment (31) is connected at one end to the front floor assembly (21) along the first direction (X). The support (32) includes a raised portion (321) and a first overlapping edge (322) extending around the raised portion (321); the raised portion (321) is used to mount a rear seat, and at least a portion of the structure of the first overlapping edge (322) is connected to the first rear floor section (31); the raised portion (321) is provided to protrude away from the first rear floor section (31) along the height direction (Z); The protrusion height of the raised portion (321) relative to the first overlapping edge (322) is adjustable; and / or, the tilt angle of the raised portion (321) away from the surface of the first rear floor section (31) relative to a horizontal plane perpendicular to the height direction (Z) is adjustable.

5. The lower car body according to claim 4, characterized in that The rear floor assembly (3) includes a second rear floor section (33), which includes a second overlap edge (331) and a first extension section (332); along the first direction (X), the second overlap edge (331) is connected to one end of the first rear floor section (31) away from the front floor assembly (21); the first extension section (332) is dimensionally adjustable along the first direction (X).

6. The lower car body according to claim 5, characterized in that: The rear floor assembly (3) includes two first side beams (34); the two first side beams (34) are respectively connected to both sides of the second rear floor section (33) along the second direction (Y), and the first side beams (34) are connected to the first rear floor section (31); The dimensions of the first side beam (34) along the first direction (X) are adjustable; the second direction (Y) is perpendicular to the first direction (X) and the height direction (Z).

7. The lower car body according to claim 4, characterized in that The front floor assembly (21) includes a first front floor section (211) and a second front floor section (212); along the first direction (X), the second front floor section (212) includes a third overlapping edge (2121), a second extension section (2122), and a fourth overlapping edge (2123) connected in sequence; the third overlapping edge (2121) is connected to the first front floor section (211), and the fourth overlapping edge (2123) is connected to the first rear floor section (31); the second extension section (2122) is adjustable in size along the first direction (X).

8. The lower car body according to claim 7, characterized in that The front floor assembly (21) includes two second side beams (213); the two second side beams (213) are respectively connected to both sides of the second front floor section (212) along the second direction (Y), and are respectively connected to both sides of the first front floor section (211) along the second direction (Y); The second side beam (213) is adjustable in size along the first direction (X); and / or, the second side beam (213) is adjustable in size along the second direction (Y).

9. The lower car body according to any one of claims 1 to 3, characterized in that, The system includes a front compartment assembly (1), which includes a front compartment frame (11), an energy-absorbing box (12), and a front collision beam (13). Along the first direction (X), the energy-absorbing box (12) is connected between the front compartment frame (11) and the front collision beam (13). The end of the front compartment frame (11) away from the front collision beam (13) is connected to the front floor assembly (21). The size of the energy-absorbing box (12) is adjustable along the first direction (X).

10. A vehicle characterized by comprising: include: The undercarriage as described in any one of claims 1-9.

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