Vehicle body

Abstract

The present invention relates to a vehicle body including a center floor including a pair of center side members extending in a vehicle longitudinal direction and respectively disposed at both sides of the center floor, a lower side member extending in the vehicle longitudinal direction, wherein the lower side member is connected to a side portion of a first center side member among the pair of center side members, and a door guide rail disposed on the lower side member, wherein a first end of the door guide rail is disposed on the first center side member. The vehicle body has a structure configured to sufficiently absorb a load generated during a side collision and prevent a sliding door from intruding into an inside of the vehicle, thereby being able to protect a battery for driving the vehicle and ensure safety.

Description

Technical Field

[0001] This invention relates to a vehicle body. Background Technology

[0002] With advancements in electric vehicles and autonomous driving technologies, private-purpose vehicles (PBVs) can meet diverse usage needs. In these PBVs, the size of the interior space is crucial for enhancing market competitiveness, as it must accommodate various intended usage scenarios. To meet these interior space requirements in PBVs, lower floor heights and sliding doors can be employed.

[0003] The above disclosures are intended only to enhance the understanding of the general background of the present invention and should not be construed as an admission or implication in any way that such disclosures constitute relevant prior art known to those skilled in the art. Summary of the Invention

[0004] In specialized vehicles that achieve a low floor height and employ sliding doors, there is a need for a vehicle body with a structure configured to adequately absorb loads generated during side collisions and prevent sliding doors from intruding into the vehicle's interior, thereby protecting the battery used to drive the vehicle and ensuring safety.

[0005] The invention is not limited to the aspects described above, and other aspects of the invention not described will be more clearly understood by those skilled in the art through the following detailed description.

[0006] According to one or more exemplary embodiments of the present invention, a vehicle body may include: a central floor including a pair of central longitudinal beams extending longitudinally along the vehicle and respectively disposed on both sides of the central floor. The vehicle body further includes: a lower side beam extending longitudinally along the vehicle. The lower side beam may be connected to a side portion of a first central longitudinal beam of the pair of central longitudinal beams. The vehicle body further includes: a door guide rail disposed on the lower side beam. A first end of the door guide rail is disposed on the first central longitudinal beam.

[0007] The vehicle body also includes a reinforcing bracket that connects the first central longitudinal beam to the first end of the door guide rail.

[0008] The first central longitudinal beam may be formed with an open upper surface. An outwardly opening is formed on the side surface of the first central longitudinal beam.

[0009] The vehicle body also includes a lower door housing, which is connected to the first central longitudinal beam via an opening inserted into the first central longitudinal beam. The lower door housing may be formed with an open outer surface, allowing the first end of the door guide rail to be positioned on the inner side of the lower door housing.

[0010] The vehicle body also includes a reinforcing bracket, which is installed on the inside of the lower door housing. A first end of the reinforcing bracket is connected to a first end of the door guide rail, and a second end of the reinforcing bracket is connected to the surface of the lower door housing.

[0011] The central floor also includes a central crossbeam extending laterally along the vehicle and connecting a pair of central longitudinal beams. The door rails include a lower rail support formed on the upper surface of the lower side beam and an upper door housing. An upper rail guide facing the lower rail support is formed in the lower part of the upper door housing. A first end of a reinforcing bracket is connected to the first end of the upper rail guide. A second end of the reinforcing bracket is connected to the inner surface of the first central longitudinal beam.

[0012] The central floor also includes a central panel, which is disposed on the upper surface of the first central longitudinal beam and the central transverse beam to cover them. The upper door housing is coplanar with the central panel.

[0013] The first central longitudinal beam can be formed to have an open upper surface. A mounting bracket configured to mount a battery is provided on the inner side of the first central longitudinal beam.

[0014] The central floor also includes: multiple central crossbeams, each extending laterally along the vehicle. The multiple central crossbeams are arranged longitudinally along the vehicle. Mounting brackets are configured to partially overlap with the multiple central crossbeams. The mounting brackets include multiple brackets disposed inside the first central longitudinal beam.

[0015] The lower beam includes the B-pillar area and the C-pillar area. The door guide rail can be installed between the B-pillar area and the C-pillar area.

[0016] The vehicle body also includes a connecting bracket disposed between the first central longitudinal beam and the lower side beam to connect the first central longitudinal beam to the lower side beam.

[0017] The vehicle body also includes: multiple central crossbeams, each extending laterally along the vehicle. The multiple central crossbeams are arranged longitudinally along the vehicle. Connecting brackets are disposed between a first central longitudinal beam and a lower side beam to overlap with the multiple central crossbeams. The connecting brackets may include multiple brackets.

[0018] The vehicle body also includes: a door arm that is slidably coupled to a door rail; and a sliding door that is coupled to the door arm.

[0019] According to one or more embodiments of the present invention, a vehicle body may include: a front frame; a rear frame; and a central floor. The central floor may include: a central frame disposed on one side of the vehicle and extending longitudinally from the rear frame to the front frame; a plurality of crossbeams extending laterally through the central frame; and a lower side beam extending longitudinally along the vehicle. The lower side beam includes: a front end connected to the front frame; a middle portion; and a rear end connected to the rear frame. The vehicle body also includes: a sliding door housing whose front end is connected to the middle portion of the lower side beam. The upper portion of the sliding door housing is coplanar with the central floor.

[0020] The middle part of the lower beam can be set below the B-pillar of the vehicle.

[0021] The rear end of the sliding door housing is connected to the rear end of the lower side beam. The rear end of the sliding door housing is located below the C-pillar of the vehicle.

[0022] The lower part of the sliding door housing is connected between the lower side beam and the central frame. Attached Figure Description

[0023] The above and other aspects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, wherein:

[0024] Figure 1 This is a side perspective view of an exemplary vehicle body;

[0025] Figure 2 An enlarged view of the lower beam of the door arm and other components used in an exemplary vehicle is shown;

[0026] Figure 3 It shows that after removing, such as Figure 2 An enlarged view of the lower side beam and other components in the upper part of the door shell shown;

[0027] Figure 4 This is a side perspective view of the bottom of an exemplary vehicle body;

[0028] Figure 5 An exemplary vehicle body with sliding doors is shown;

[0029] Figure 6 This is a bottom view of an exemplary part of the vehicle body, viewed from below.

[0030] Figure 7 The lower side beam, door rails, lower door shell, and central longitudinal beam of an exemplary vehicle body are shown.

[0031] Figure 8 A central longitudinal beam of an exemplary vehicle body is shown; and

[0032] Figure 9This is a bottom view of an exemplary vehicle body, showing the central crossbeam, central longitudinal beam, connecting bracket, and lower side beam, viewed from below. Detailed Implementation

[0033] In the following description of one or more exemplary embodiments of the invention, detailed descriptions of incorporated known techniques will be omitted where such inclusion might obscure the subject matter of the invention. Furthermore, exemplary embodiments of the invention will be more clearly understood through the accompanying drawings and should not be limited thereto. It should be understood that all changes, equivalents, and substitutions that do not depart from the spirit and scope of the invention are included within the scope of the invention. The following description is not intended to limit the invention to the exact forms disclosed or a particular field of use. Therefore, various alternative embodiments and / or modifications (whether explicitly described or implied herein) are possible in consideration of the invention. Those skilled in the art will recognize that changes in form and detail may be made without departing from the scope of the invention.

[0034] The invention will be described with reference to one or more exemplary embodiments. However, as those skilled in the art will understand, the various exemplary embodiments disclosed herein can be modified or implemented in various other ways without departing from the spirit and scope of the invention. Therefore, the following description should be considered illustrative and intended to teach those skilled in the art how to make and use the various exemplary embodiments. It should be understood that the forms of the invention shown and described herein should be considered representative exemplary embodiments. Equivalent elements, materials, processes, or steps may be substituted for those representatively shown and described. Expressions such as “comprising,” “including,” “incorporated,” “consisting of,” “having,” and “is” used to describe the invention are intended to be interpreted in a non-exclusive manner, allowing for the presence of items, components, or elements not explicitly described. Unless explicitly used to the contrary, singular expressions should be interpreted to include the plural meaning.

[0035] For the purposes of this application and claims, the exemplary phrases “at least one: A; B; or C” or “at least one A, B, or C” are used, which means “at least one A, or at least one B, or at least one C, or any combination of at least one A, at least one B, and at least one C.” Furthermore, exemplary phrases such as “A, B, or C,” “at least one of A, B, and C,” “at least one of A, B, or C,” etc., as used herein, may refer to each of the listed items or all possible combinations of the listed items. For example, “at least one of A or B” may refer to (1) at least one A; (2) at least one B; or (3) at least one A and at least one B.

[0036] Furthermore, the various exemplary embodiments disclosed herein should be considered illustrative and explanatory, and in no way should be construed as limiting the invention. All references to connections (e.g., attachment, fixation, combination, connection, etc.) are for the purpose of aiding understanding the invention and should not be limiting, particularly regarding the location, orientation, or use of the disclosed construction or method. Therefore, any reference to connections should be interpreted broadly. Moreover, such references to connections do not necessarily imply that two elements are directly connected to each other. Furthermore, all numerical terms, such as but not limited to “first,” “second,” “third,” “primary,” “secondary,” “main,” or any other ordinal or numerical terms, should also be considered merely as identifiers to aid understanding of the various elements, exemplary embodiments, variations, or modifications of the invention, and do not imply any limitation on the invention, any variation or modification of any element, or any limitation on their order or preference. That is, although such expressions may be used to describe various constituent elements, these constituent elements are not limited by the expressions associated with them. Such expressions are only used to distinguish one constituent element from another.

[0037] The suffixes “module” and “unit” used in this article are for ease of description and are therefore interchangeable, without any distinguishing meaning or function.

[0038] When a component is referred to as "connected" or "linked" to another component, it should be understood that the component can be directly connected or linked to the other component, or that there may be another component between them. Conversely, when a component is referred to as "directly connected" or "directly linked" to another component, it should be understood that there are no other components between them.

[0039] Any number or variety of components of any construction disclosed in this invention may be included in this invention. Such components may include any combination of the feature portions disclosed in this invention and may be arranged to constitute any of the various constructions disclosed in this invention. The structure and arrangement of the components of this invention, as well as the concepts regarding their use and operation, can be applied not only to the specific exemplary embodiments discussed in this invention, but also to any number and combination of exemplary embodiments. In the following description, exemplary embodiments including various feature portions having various arrangements will be described with reference to the accompanying drawings.

[0040] In the following, one or more exemplary embodiments of the invention disclosed herein will be described in detail with reference to the accompanying drawings, and the same or similar elements will be indicated by the same reference numerals, regardless of the numbers in the drawings, and redundant descriptions thereof will be omitted.

[0041] Figure 1 This is a side perspective view of an exemplary vehicle body. Figure 2An enlarged view of the lower beam of the door arm and other components used in an exemplary vehicle is shown. Figure 3 It shows that after removing, such as Figure 2 An enlarged view of the lower side beam and other components in the upper part of the door shell shown. Figure 4 This is a side perspective view of the bottom of an exemplary vehicle body. Figure 5 An exemplary vehicle body with sliding doors is shown. Figure 6 This is a bottom view of an exemplary part of the vehicle body, viewed from below. Figure 7 The lower side beam of the body, door rails, lower door shell, and central longitudinal beam of an exemplary vehicle are shown. Figure 8 The central longitudinal beam of an exemplary vehicle body is shown. Figure 9 This is a bottom view of an exemplary vehicle body, showing the central crossbeam, central longitudinal beam, connecting bracket, and lower side beam, viewed from below.

[0042] To achieve the above aspects, the vehicle body according to the invention may include a central floor 100. The central floor 100 may include a pair of central longitudinal beams 110 (also referred to as central side portions, central side frame portions, or central frame) extending longitudinally along the vehicle, and a central crossbeam 120 (also referred to as a central transverse portion, central transverse member, or crossbar) extending in the vehicle width direction (e.g., lateral direction). The central crossbeam 120 may be connected between the central longitudinal beams 110. The central floor 100 may also include lower side beams 200 extending longitudinally along the vehicle. The lower side beams 200 may be coupled to both sides of the central longitudinal beams 110 (e.g., each lower side beam 200 may be coupled to the side of each of the pair of central longitudinal beams 110). The central floor 100 may also include door rails 300 disposed at the upper end (e.g., above) of the lower side beams 200. The door rails 200 may be configured such that door arms 310 coupled to sliding doors 320 can be slidably coupled to the door rails 300. One end of the door guide rail 300 may be located inside (e.g., above) the central longitudinal beam 110. The central floor 100 may also include a reinforcing bracket 400 configured to connect the central longitudinal beam 110 and the end of the door guide rail 300.

[0043] Specifically, refer to Figures 1 to 7The central floor 100 can be connected to the front body structure F and the rear body structure L to form the body. The central floor 100 may include central longitudinal beams 110 and central transverse beams 120, which provide basic rigidity to the body. The central longitudinal beams 110 may extend longitudinally along the vehicle and may be positioned on opposite sides of the body such that a pair of central longitudinal beams 110 face each other in a spaced-apart (e.g., parallel) state. Additionally, the pair of central longitudinal beams 110 are connected by central transverse beams 120. Multiple central transverse beams 120 may be provided such that multiple central transverse beams 120 connect a pair of central longitudinal beams 110 in a spaced-apart state. Each of the multiple central transverse beams 120 may extend laterally along the vehicle and be arranged at regular intervals longitudinally along the vehicle. (Reference) Figure 6 One end of each central longitudinal beam 110 is connected to the front longitudinal beam F1 contained in the front body structure F, while the other end of the central longitudinal beam 110 is connected to the rear longitudinal beam L1 contained in the rear body structure L.

[0044] Additionally, a lower side beam 200 extending longitudinally along the vehicle is provided on the side of the central longitudinal beam 110. One end of the lower side beam 200 is attached to a part of the front body structure F, similar to the central longitudinal beam 110, and the other end of the lower side beam 200 is attached to a part of the rear body structure L.

[0045] A sliding door 320 that opens or closes longitudinally along the vehicle body can be installed on the vehicle body. (Reference) Figures 2 to 5 A door guide rail 300 is provided for the application of the sliding door 320. The door guide rail 300 can be mounted on the upper end of the lower side beam 200, and the door arm 310 is coupled to the door guide rail 300 to be able to slide in the extending direction of the door guide rail 300. The sliding door 320 can be coupled to the door arm 310.

[0046] The door guide rail 300 can be formed on the upper surface of the lower side beam 200, but one end of the door guide rail 300 can be bent inward toward the inside of the vehicle to be positioned inside the central longitudinal beam 110. Since one end of the door guide rail 300 is located inside the vehicle, when the sliding door 320 is closed, the sliding door 320 can be coplanar with the outer panels of the vehicle body (e.g., B-pillar, C-pillar, etc.). When the sliding door 320 is open, the sliding door 320 can slide outward beyond the outer panel to prevent interference (e.g., contact) with other parts of the vehicle body.

[0047] Additionally, a reinforcing bracket 400 can be further provided to protect the battery mounted to the vehicle body from side impacts. The reinforcing bracket 400 connects one end of the central longitudinal beam 110 and the door guide rail 300. Since both the central longitudinal beam 110 and the door guide rail 300 extend longitudinally along the vehicle, the reinforcing bracket 400 connects the central longitudinal beam 110 and the door guide rail 300 along the vehicle width direction (e.g., the lateral direction). Therefore, even in the event of a side impact, the reinforcing bracket 400 prevents the door arm 310 from intruding into the vehicle, thereby protecting the battery mounted to the vehicle body.

[0048] Simultaneously, load paths can be formed by the central longitudinal beam 110 and central transverse beam 120 constituting the central floor 100 to appropriately distribute the load generated during a side collision. That is, the door arm 310, positioned above the lower side beam 200, impacts the reinforcing bracket 400, which in turn connects to the side surface of the central longitudinal beam 110. The load transmitted to the central longitudinal beam 110 can be transferred to the central transverse beam 120, which is connected to the central longitudinal beam 110.

[0049] As described above, by applying a reinforcing bracket 400 configured to connect one end of the central longitudinal beam 110 and the door guide rail 300, vehicles with low floor height and sliding doors 320 (e.g., special vehicles) can ensure stiffness to withstand side impacts.

[0050] The central longitudinal beam 110 may have a shape with an open upper surface and closed other three surfaces. However, an outwardly opening 111 may be formed on the side surface of the middle portion of the central longitudinal beam 110. (See reference) Figure 7 and Figure 8 The lower part 302 of the door housing (also referred to as the lower door housing or the lower plate of the door housing) can be inserted through the opening 111 to connect to the central longitudinal beam 110. Since the lower part 302 of the door housing can also have an open outer surface, one end of the door guide rail 300 can be located inside the lower part 302 of the door housing. One end of the door guide rail 300 can be considered to be located inside the central longitudinal beam 110.

[0051] Additionally, a reinforcing bracket 400 can be disposed on the inner side of the lower part 302 of the door housing. One end of the reinforcing bracket 400 can be connected to one end of the door guide rail 300, while the other end of the reinforcing bracket 400 can be connected to a surface of the lower part 302 of the door housing. Therefore, the reinforcing bracket 400 can be considered to connect one end of the door guide rail 300 and the central longitudinal beam 110 along the vehicle width direction (e.g., the lateral direction). Thus, the load path that will transfer the load generated during a side collision to the central longitudinal beam 110 and the central transverse beam 120 can be formed by the reinforcing bracket 400.

[0052] As described above, the door guide rail 300 can be configured to allow the door arm 310 to slide longitudinally along the vehicle. The door guide rail 300 may include a lower guide rail support 332 formed on the upper surface of the lower side beam 200 and an upper guide rail guide 331 formed facing the lower guide rail support 332. The door arm 310 may be formed with a roller structure 311. The roller structure 311 may be combined with both the lower guide rail support 332 and the upper guide rail guide 331 to allow sliding longitudinally along the vehicle.

[0053] An upper guide rail guide 331 is formed on the lower surface of the upper part 301 of the door housing (e.g., the upper panel of the door housing). The upper part 301 of the door housing can be used to prevent the upper guide rail guide 331 and the lower guide rail support 332 from being exposed outward. The upper part 301 of the door housing can be used as an upper housing, and the lower part 302 of the door housing described above can be used as a lower housing. That is, the upper guide rail guide 331 and the lower guide rail support 332 can be inserted into the lower part 302 of the door housing to prevent the structure that assists in sliding the door arm 310 from being exposed to the outside of the vehicle body. In the above structure, one end of the reinforcing bracket 400 can be connected to one end of the upper guide rail guide 331, and the other end of the reinforcing bracket 400 can be connected to the inner surface of the central longitudinal beam 110 or a surface of the lower part 302 of the door housing.

[0054] In addition, such as Figure 5 As shown, the upper part 301 of the door housing can be coplanar with the central panel, which covers the upper surface of the central longitudinal beam 110 and the upper surface of the central transverse beam 120 of the central floor 100.

[0055] refer to Figure 8 The central longitudinal beam 110 can be formed to have an open upper surface. Therefore, the mounting bracket 600 configured to mount the battery can be further disposed inside the central longitudinal beam 110. Specifically, refer to... Figure 4 The side of the battery may be provided with a flange configured to mount the battery to the vehicle body. This flange may extend longitudinally along the vehicle and may be fastened to a mounting bracket 600 by bolts or the like, thereby mounting the battery to the central longitudinal beam 110.

[0056] In addition to assisting in battery installation, the mounting bracket 600 can be disposed inside the central longitudinal beam 110 to partially overlap with the central cross beam 120. Therefore, the mounting bracket 600 can not only be used to strengthen the rigidity of the central longitudinal beam 110, but also form a load path to transfer the load applied to the central longitudinal beam 110 to the central cross beam 120.

[0057] The lower beam 200 may include a B-pillar region 220 forming a B-pillar and a C-pillar region 230 forming a C-pillar. A door guide rail 300 may be disposed between the B-pillar region 220 and the C-pillar region 230. Therefore, the sliding door 320 allows passengers to access the rear seats of the vehicle (e.g., the second or higher row of seats).

[0058] In addition to mounting bracket 600, connecting bracket 500 can be disposed between central longitudinal beam 110 and lower side beam 200. Although there are points where central longitudinal beam 110 and lower side beam 200 are directly connected, or central longitudinal beam 110 and lower side beam 200 can be directly connected, central longitudinal beam 110 and lower side beam 200 can be connected by connecting bracket 500. Connecting bracket 500 connects lower side beam 200 and central longitudinal beam 110 along the vehicle width direction (e.g., lateral direction) to transfer side impact loads applied to lower side beam 200 to central longitudinal beam 110.

[0059] Furthermore, similar to mounting bracket 600, connecting bracket 500 can be disposed between the central longitudinal beam 110 and the lower side beam 200 to overlap with the central cross beam 120. When connecting bracket 500 is arranged to overlap with the central cross beam 120, the load generated at the lower side beam 200 can be transferred to the central longitudinal beam 110 through connecting bracket 500. Subsequently, the load can be transferred to the central cross beam 120 through mounting bracket 600, etc.

[0060] According to the present invention, the above and other aspects can be achieved by providing a vehicle body including a central floor, the central floor including: a pair of central longitudinal beams extending longitudinally along the sides of the central floor; a lower side beam extending longitudinally along the vehicle, the lower side beam being coupled to the side of each central longitudinal beam; and a door guide rail disposed at the upper end of the lower side beam, one end of the door guide rail being disposed at the upper end of the central longitudinal beam.

[0061] The vehicle body may also include a reinforcing bracket configured to connect one end of the central longitudinal beam and the door rail.

[0062] The central longitudinal beam can be formed with an open upper surface, and outward openings can be formed on the side surfaces of the central longitudinal beam.

[0063] The lower part of the door housing can be inserted into the opening of the central longitudinal beam and connected to the central longitudinal beam. The lower part of the door housing can be formed with an open outer surface so that one end of the door guide rail is located on the inner side of the lower part of the door housing.

[0064] The reinforcing bracket can be installed on the inner side of the lower part of the door housing. One end of the reinforcing bracket can be connected to one end of the door guide rail, and the other end of the reinforcing bracket can be connected to a surface of the lower part of the door housing.

[0065] The central floor may include a central crossbeam extending along the width of the vehicle, the central crossbeam being configured to connect to a central longitudinal beam. The door rails may include a lower rail support formed on the upper surface of a lower side beam, and an upper door housing portion formed with an upper rail guide facing the lower rail support, the upper rail guide being formed on the lower portion of the upper door housing portion. One end of a reinforcing bracket may be connected to one end of the upper rail guide, and the other end of the reinforcing bracket may be connected to the inner surface of the central longitudinal beam.

[0066] The central floor may also include a central panel disposed on the upper surface of the central longitudinal beams and central transverse beams to cover them. The upper part of the door housing may be coplanar with the central panel.

[0067] The central longitudinal beam can be formed with an open upper surface, and a mounting bracket configured to install a battery can be provided on the inner side of the central longitudinal beam.

[0068] Multiple central crossbeams can be configured along the longitudinal direction of the vehicle. Multiple mounting brackets can be configured inside the central longitudinal beams. The mounting brackets can be configured to partially overlap with the central crossbeams.

[0069] The lower beam may include the B-pillar area and the C-pillar area. The door guide rail may be installed between the B-pillar area and the C-pillar area.

[0070] The connecting bracket can be set between the central longitudinal beam and the lower side beam to connect the central longitudinal beam and the lower side beam.

[0071] Multiple central crossbeams can be configured along the longitudinal direction of the vehicle. Multiple connecting brackets can also be configured. These connecting brackets can be positioned between the central longitudinal beam and the lower side beam, overlapping the central crossbeam.

[0072] The door arm can be slidably attached to the door rail, and the sliding door can be attached to the door arm.

[0073] According to the vehicle body of the present invention, in the event of a side collision, the door arm can be prevented from intruding into the vehicle interior. Furthermore, the load is effectively distributed along the central longitudinal beam and central transverse beam. Therefore, the battery can be protected from impact during a side collision.

[0074] The effects that can be obtained in this invention are not limited to those described above, and other effects of this invention not described will be more clearly understood by those skilled in the art through the above description.

[0075] Although one or more exemplary embodiments of the invention have been disclosed above for illustrative purposes, those skilled in the art will understand that various modifications, additions, and substitutions may be made without departing from the scope and spirit of the invention as disclosed in the appended claims.

Claims

1. A vehicle body, the vehicle body comprising: The central floor includes a pair of central longitudinal beams that extend longitudinally along the vehicle and are respectively disposed on both sides of the central floor; A lower side beam extending longitudinally along the vehicle, wherein the lower side beam is connected to the side of the first central longitudinal beam of the pair of central longitudinal beams; and The door guide rail is provided on the lower side beam, wherein the first end of the door guide rail is provided on the first central longitudinal beam.

2. The vehicle body according to claim 1, further comprising: A reinforced bracket is used to connect the first central longitudinal beam to the first end of the door guide rail.

3. The vehicle body according to claim 1, wherein, The first central longitudinal beam is shaped to have an open upper surface, and an outwardly open opening is formed on the side surface of the first central longitudinal beam.

4. The vehicle body according to claim 3, further comprising: The lower door housing is connected to the first central longitudinal beam by inserting into the opening of the first central longitudinal beam, and The lower door housing is shaped to have an open outer surface, allowing the first end of the door guide rail to be positioned inside the lower door housing.

5. The vehicle body according to claim 4, further comprising: A reinforcing bracket is installed on the inner side of the lower door housing. Wherein, the first end of the reinforcing bracket is connected to the first end of the door guide rail, and The second end of the reinforcing bracket is connected to the surface of the lower door housing.

6. The vehicle body according to claim 5, wherein, The central floor also includes: The central crossbeam extends laterally along the vehicle and connects the pair of central longitudinal beams. The door guide rail includes: The lower guide rail support is formed on the upper surface of the lower side beam, and An upper door housing, wherein an upper guide rail guide is formed at the lower part of the upper door housing facing the lower guide rail support, and The first end of the reinforcing bracket is connected to the first end of the upper guide rail guide, and the second end of the reinforcing bracket is connected to the inner surface of the first central longitudinal beam.

7. The vehicle body according to claim 6, wherein, The central floor also includes a central panel disposed on the upper surface of the first central longitudinal beam and the central transverse beam to cover the first central longitudinal beam and the central transverse beam. The upper door shell is coplanar with the central panel.

8. The vehicle body according to claim 1, wherein, The first central longitudinal beam is formed to have an open upper surface, and wherein a mounting bracket configured to mount a battery is provided on the inner side of the first central longitudinal beam.

9. The vehicle body according to claim 8, wherein, The central floor also includes: Multiple central crossbeams, each extending laterally along the vehicle, wherein the multiple central crossbeams are arranged longitudinally along the vehicle. The mounting bracket is configured to partially overlap with the plurality of central crossbeams, and The mounting bracket includes multiple brackets disposed on the inner side of the first central longitudinal beam.

10. The vehicle body according to claim 1, wherein, The lower beam includes the B-column area and the C-column area, and The door guide rail is located between the B-pillar area and the C-pillar area.

11. The vehicle body according to claim 1, further comprising a connecting bracket disposed between the first central longitudinal beam and the lower side beam to connect the first central longitudinal beam to the lower side beam.

12. The vehicle body according to claim 11, further comprising: Multiple central crossbeams, each extending laterally along the vehicle, wherein the multiple central crossbeams are arranged longitudinally along the vehicle. The connecting bracket is disposed between the first central longitudinal beam and the lower side beam, so as to overlap with the plurality of central transverse beams, and The connecting bracket includes multiple brackets.

13. The vehicle body according to claim 1, further comprising: The door arm is slidably coupled to the door guide rail; as well as The sliding door is attached to the door arm.

14. A vehicle body, the vehicle body comprising: Front frame; Back frame; Central floor, including: A central frame is disposed on one side of the vehicle and extends longitudinally from the rear frame to the front frame; Multiple crossbeams extend laterally through the central frame; and A lower side beam extending longitudinally along the vehicle, the lower side beam comprising: Connected to the front end of the front frame; The middle part; and Connected to the rear end of the rear frame; and A sliding door housing, the front end of which is connected to the middle portion of the lower side beam, wherein the upper portion of the sliding door housing is coplanar with the central floor.

15. The vehicle body according to claim 14, wherein, The middle part of the lower side beam is located below the B-pillar of the vehicle.

16. The vehicle body according to claim 14, wherein, The rear end of the sliding door housing is connected to the rear end of the lower side beam, and the rear end of the sliding door housing is located below the C-pillar of the vehicle.

17. The vehicle body according to claim 14, wherein, The sliding door housing also includes a lower part connected between the lower side beam and the central frame.

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