underbody structure

Abstract

The present disclosure provides a lower structure of a vehicle body, which can include a rear floor structure; a front cross beam connected to an upper portion of the rear floor structure in a vehicle width direction; a rear cross beam disposed to be spaced apart from the front cross beam and connected to an upper portion of the rear floor structure in the vehicle width direction; and a rear crush panel on the front cross beam and the rear cross beam and connected to the front cross beam and the rear cross beam.

Description

Cross-references to related applications

[0001] This application claims priority and benefit to Korean Patent Application No. 10-2025-0045989, filed with the Korean Intellectual Property Office on April 9, 2025, and Korean Patent Application No. 10-2025-0092972, filed with the Korean Intellectual Property Office on July 10, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the lower structure of the vehicle body. Background Technology

[0003] Recently, the automotive industry has proposed a new vision for future mobility oriented towards dynamic, human-centered cities. One such future mobility solution is the private vehicle (PBV).

[0004] For example, a PBV can be an environmentally friendly mobility vehicle based on an electric vehicle (EV). Such a PBV can provide a variety of customized services during the user's travel time from origin to destination.

[0005] PBVs can be manufactured in various shapes and sizes to suit different user scenarios. For example, PBVs can be used as ride-hailing or delivery vehicles.

[0006] Here, the term "vehicle type" can refer to a vehicle that can be used by people with mobility impairments. In such vehicles, ramp modules can be installed as wheelchair-accessible devices for people with mobility impairments.

[0007] The ramp module is designed to allow wheelchairs for people with mobility impairments to get on and off the vehicle, and to secure or restrain the wheelchairs.

[0008] For example, this ramp module can be applied to floor structures modified through special processing (such as cutting the floorboards of general-purpose vehicles). Alternatively, as another example, the ramp module can be applied to aluminum body-type floor structures manufactured using original equipment manufacturing methods from the initial vehicle body design stage.

[0009] However, in the former case, additional labor is required due to the modification of the floor structure of the base vehicle, and the floor structure may deform. Conversely, in the latter case, manufacturing costs may increase because the floor structure is made from an expensive aluminum body, and the customer base may be limited.

[0010] The matters described in this background section are intended to help understand the context of this disclosure, and may include matters that are not prior art that are known, disclosed or in use. Summary of the Invention

[0011] This disclosure relates to a vehicle body, and more specifically, to a lower structure of a vehicle body that facilitates passenger access for people with mobility impairments.

[0012] Some embodiments of this disclosure may provide a lower body structure for a vehicle that allows for the sharing of base body structures across various vehicle types as much as possible, and can be modified to accommodate passengers with mobility impairments.

[0013] The lower structure of the vehicle body according to an embodiment of the present disclosure may include: a front crossbeam connected to the upper front portion of the rear floor structure along the vehicle width direction; a rear crossbeam configured to be spaced apart from the front crossbeam and connected to the upper portion of the rear floor structure along the vehicle width direction; and a rear pressure plate connected to the front crossbeam and the rear crossbeam.

[0014] The rear floor structure can be the rear floor structure of the basic vehicle body.

[0015] The rear pressure plate can be connected to the central pressure plate, which covers the ramp module embedded in the central floor structure.

[0016] The lower structure of the vehicle body according to an embodiment of the present disclosure may further include an extension beam that is connected to both sides of the rear floor structure and to both ends of the front beam along the vehicle width direction.

[0017] The pressure plate mounting section can be installed on each of the front crossbeam, rear crossbeam, and extension crossbeam.

[0018] The rear crossbeam can be connected to the shock absorber bracket, which is connected to one side of the rear floor structure along the width of the vehicle.

[0019] The length of the rear crossbeam can be less than the length of the front crossbeam, and the rear crossbeam can be configured to be spaced apart from the other side of the rear floor structure along the vehicle width direction.

[0020] The lower structure of the vehicle body according to an embodiment of the present disclosure may further include: a front transverse member disposed along the vehicle width direction at a position corresponding to the front crossbeam at the lower front part of the rear floor structure; a middle transverse member disposed along the vehicle width direction at a second position corresponding to the rear crossbeam at the lower part of the rear floor structure; and a rear transverse member disposed along the vehicle width direction at the lower rear part of the rear floor structure.

[0021] Each of the front crossbeams and front cross members can form a closed section connecting the upper and lower portions of the rear floor panel to the rear floor structure.

[0022] Each of the rear crossbeams and intermediate cross members can form a closed section connecting the upper and lower parts of the rear floor panel.

[0023] The lower structure of the vehicle body according to an embodiment of the present disclosure may further include: a first longitudinal beam connected along the longitudinal direction of the vehicle to one side of the front crossbeam and the upper part of the rear floor structure, and connected to the rear crossbeam; and a second longitudinal beam connected along the longitudinal direction of the vehicle to the other side of the front crossbeam and the upper part of the rear floor structure.

[0024] The length of the rear crossbeam can be less than that of the front crossbeam. One end of the rear crossbeam can be connected to one side of the rear floor structure along the vehicle width direction, and the other end of the rear crossbeam can be spaced apart from the other side of the rear floor structure along the vehicle width direction.

[0025] The second longitudinal beam can be positioned along the longitudinal direction of the vehicle between the other end of the rear crossbeam and the other side of the rear floor structure.

[0026] The lower structure of the vehicle body according to an embodiment of the present disclosure may further include an extended longitudinal beam connected in the longitudinal direction of the vehicle to a second longitudinal beam and connected to the upper part of the rear floor structure.

[0027] The front transverse member can be installed along the vehicle width direction at the lower front part of the rear floor structure, corresponding to the position of the front crossbeam; the middle transverse member can be installed along the vehicle width direction at the lower part of the rear floor structure, corresponding to the position of the rear crossbeam; and the rear transverse member can be installed along the vehicle width direction at the lower rear part of the rear floor structure.

[0028] The first seat mounting part can be set at a position on the rear floor structure corresponding to the rear transverse member. An extended longitudinal beam connected to the second longitudinal beam along the longitudinal direction of the vehicle can be connected to the first seat mounting part. The second seat mounting part can be set at a position on the rear floor structure corresponding to the middle transverse member, and the second longitudinal beam and the extended longitudinal beam can be connected to the second seat mounting part.

[0029] At least one anchoring installation may be provided on each of the first and second longitudinal beams.

[0030] By utilizing the lower structure of the vehicle body according to some embodiments of the present disclosure, it is possible to ensure that the vehicle body can be expanded according to the purpose and use cases of the PBV, can be produced in combination according to the specifications of the vehicle body, and can respond to the multi-specification PBV market.

[0031] Advantages that may be obtained or anticipated due to some of the exemplary embodiments will be disclosed, directly or implicitly, in the detailed description of the disclosed exemplary embodiments. That is, various advantages contemplated according to some of the exemplary embodiments will be disclosed in the following detailed description. Attached Figure Description

[0032] These accompanying drawings are for illustrative purposes only and should not be construed as being limited to the exemplary embodiments disclosed herein.

[0033] Figure 1 and Figure 2 This is a view showing the body of a PBV (Private Branch Vehicle) applied to the lower structure of the vehicle body according to an exemplary embodiment of the present disclosure.

[0034] Figure 3 This is a view showing the wheelchair-accessible state of a PBV applied to the lower structure of a vehicle body according to an exemplary embodiment of the present disclosure.

[0035] Figure 4 This is a top view showing the lower structure of a vehicle body according to an exemplary embodiment of the present disclosure.

[0036] Figure 5 and Figure 6 This is a perspective view showing the lower structure of a vehicle body according to an exemplary embodiment of the present disclosure.

[0037] Figure 7 This is a view showing a pressure plate mounting portion applied to the lower structure of a vehicle body according to an exemplary embodiment of the present disclosure.

[0038] Figure 8 This is a bottom perspective view showing the lower structure of a vehicle body according to an exemplary embodiment of the present disclosure.

[0039] Figure 9 This is a cross-sectional view showing the lower structure of a vehicle body according to an exemplary embodiment of the present disclosure.

[0040] Figure 10 This is a view showing a seat mounting portion applied to the lower structure of a vehicle body according to an exemplary embodiment of the present disclosure.

[0041] Figure 11 This is a view showing an anchoring mounting portion applied to the lower structure of a vehicle body according to an exemplary embodiment of the present disclosure.

[0042] The accompanying drawings cited above are not drawn to scale, and it is understood that they may present a simplified representation to some extent of the various features illustrating some principles of the disclosed exemplary embodiments. For example, specific design features of the disclosed exemplary embodiments, including specific dimensions, orientations, positions, and shapes, may be determined in part by the specific intended application and usage environment. Detailed Implementation

[0043] The following describes some exemplary embodiments in detail with reference to the accompanying drawings, so that those skilled in the art to which this disclosure pertains can easily implement the embodiments of this disclosure. However, the disclosed exemplary embodiments may be implemented in many different forms, and this disclosure is not necessarily limited to the exemplary embodiments described herein.

[0044] The terminology used herein is intended to describe particular exemplary embodiments and is not necessarily intended to limit the scope of this disclosure. Unless the context clearly requires otherwise, the singular forms used herein may also include the plural forms.

[0045] It can be further understood that the terms "comprising" and / or "including" as used herein indicate the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The term "and / or" as used herein includes any one or all combinations of one or more of the associated listed items.

[0046] In this specification, the term "connection" can refer to the physical relationship between two components, such as direct connection by welding, SPR self-piercing rivets, FDS self-tapping screws, structural adhesives, etc., or indirect connection by one or more intermediate components.

[0047] As used herein, the terms “vehicle,” “of a vehicle,” “automobile,” or other similar terms may include passenger vehicles, including sedans, sports cars, SUVs, buses, tractors, trucks, and various commercial vehicles; and may also include hybrid vehicles, electric vehicles, hybrid-electric vehicles, PBVs based on electric vehicles, hydrogen-powered vehicles, and other alternative fuel vehicles, for example, those using fuels derived from resources other than petroleum.

[0048] Next, some exemplary embodiments of this disclosure will be described in detail with reference to the accompanying drawings.

[0049] Figure 1 and Figure 2 This is a view showing the body of a PBV applied to the lower structure of the vehicle body according to an example embodiment.

[0050] Reference Figure 1 and Figure 2 According to some embodiments, the lower structure 100 of the vehicle body can be applied to, for example, the body 1 of a special purpose vehicle (hereinafter referred to as "PBV").

[0051] In some embodiments, a PBV can be used, for example, as a life module vehicle based on an electric vehicle, to provide users with a variety of customized services during the travel time from origin to destination.

[0052] In some embodiments, the body 1 of such a PBV can be manufactured in various shapes and sizes depending on the purpose and use cases of the PBV.

[0053] In some embodiments, the body 1 of the PBV can be used for various vehicle types, such as passenger vehicles, delivery vehicles for cargo transportation, and special vehicles such as ambulances.

[0054] In this specification, the reference directions for the following components may be set based on the vehicle body as the vehicle longitudinal direction (e.g., the vehicle length direction or longitudinal direction), the vehicle width direction (e.g., the lateral or left-right direction), and the vertical direction (e.g., the height direction).

[0055] In this specification, the terms "upper end", "upper part", "upper end" or "upper surface" of a component may refer to the end, component, part or surface of a component that is located above the drawing, and the terms "lower end", "lower part", "lower end" or "lower surface" of a component may refer to the end, component, part or surface of a component that is located below the drawing.

[0056] In this specification, the end of a component (e.g., one end, the other end, or both ends) may refer to the end of the component in any direction, and the end portion of a component (e.g., one end, the other end, both ends, the front end, or the rear end) may refer to a portion of the component that includes the end portion.

[0057] In some embodiments, the PBV can be used as a call vehicle, wherein a sliding door is mounted on the side of the vehicle body 1 along the width direction of the vehicle.

[0058] In some embodiments, the PBV may include a rear seat assembly 3 mounted at the rear of the vehicle body 1.

[0059] In some embodiments, the rear seat assembly 3 may be configured, for example, as a seat cushion that can flip up and down, and whose cushion can rotate in the vertical direction. The structure and operation of this rear seat assembly 3 with a flip-up cushion will be obvious to those skilled in the art, and therefore a detailed description will be omitted.

[0060] In some embodiments, the PBV may include a ramp module 5, which may be a wheelchair-mounted device for people with mobility impairments to board the vehicle.

[0061] Figure 3 This is a view showing the wheelchair-accessible state of a PBV applied to the lower structure of a vehicle body according to an example embodiment.

[0062] In some embodiments, the ramp module 5 may be a wheelchair access ladder device, such as... Figure 3 As shown, its structure allows wheelchairs 6, used by people with mobility impairments, to get on and off the vehicle through the opening of the sliding door.

[0063] In some embodiments, the ramp module 5 may be installed, for example, in an embedded manner in the central floor structure 7 of the vehicle body 1. When inserted into the central floor structure 7, the ramp module 5 may protrude to the outside of the vehicle body 1 if necessary.

[0064] In some embodiments, the body 1 of the PBV may include a rear floor structure 10 connected to the rear of the central floor structure 7. The rear floor structure 10 may include a combination of panels and components.

[0065] In some embodiments, a rear seat assembly 3 with a seat cushion that flips up and down can be installed in the rear floor structure 10.

[0066] Therefore, in some embodiments, with the seat cushion of the rear seat assembly 3 flipped upwards, the wheelchair 6 can enter the rear floor structure 10 or drive out of the vehicle via the ramp module 5.

[0067] In some embodiments, the PBV body 1 can be a base body 1a for various vehicle types (e.g., vehicle types called model vehicles). In some embodiments, the base body 1a for various model types can be a generic component that is not replaced even if the PBV specifications change according to the PBV's purpose and use cases. The base body 1a may include the rear floor structure 10 as described above.

[0068] In some embodiments, the lower structure 100 of the vehicle body can transform the base body 1a of various vehicle models into a vehicle that enables people with mobility impairments to ride in it while sharing the base body 1a as much as possible, can make the floor flat to ensure a spacious interior, and provide a structure that can secure a wheelchair 6.

[0069] In some embodiments, the lower structure 100 of the vehicle body can provide a structure that can enhance the mounting rigidity of the rear seat assembly 3 and the rear-end collision performance of the vehicle body.

[0070] Figure 4 This is a top view showing the lower structure of the vehicle body according to an example embodiment. Figure 5 and Figure 6 This is a perspective view showing the lower structure of the vehicle body according to an example embodiment.

[0071] Reference Figures 1 to 6 In some embodiments, the lower structure 100 of the vehicle body may include a front crossbeam 20, an extension crossbeam 30, a rear crossbeam 40, a shock absorber bracket 50, a first longitudinal beam 60, a second longitudinal beam 70, and an extension longitudinal beam 80.

[0072] In some embodiments, the lower structure 100 of the vehicle body may further include a rear pressure plate 90.

[0073] In some embodiments, the front crossbeam 20, the extension crossbeam 30, the rear crossbeam 40, the shock absorber bracket 50, the first longitudinal beam 60, the second longitudinal beam 70, and the extension longitudinal beam 80 may be installed on the upper part of the rear floor structure 10.

[0074] In some embodiments, the rear floor structure 10 may include a rear floor panel 11. A front crossbeam 20, an extension crossbeam 30, a rear crossbeam 40, a shock absorber bracket 50, a first longitudinal beam 60, a second longitudinal beam 70, and an extension longitudinal beam 80 may be mounted in a grid pattern on the upper part of the rear floor panel 11.

[0075] In some embodiments, the front crossbeam 20 may be connected to the upper front portion of the rear floor structure 10 along the vehicle width direction.

[0076] In some embodiments, the front crossbeam 20 may be configured to form an upward shape at both edge ends along the longitudinal direction of the vehicle. For example, the front crossbeam 20 may be configured as a component made of, for example, steel.

[0077] For example, this front crossbeam 20 can be welded to the upper front of the rear floor panel 11.

[0078] In some embodiments, the extension beam 30 may be configured to enhance the stiffness of the front beam 20 along the vehicle width direction. The extension beam 30 may be connected to both sides of the rear floor structure 10 along the vehicle width direction and may be connected to both ends of the front beam 20.

[0079] In some embodiments, each extension beam 30 may be configured to be formed upward at the edge. For example, each extension beam 30 may be configured as a component made of steel.

[0080] In some embodiments, each extension beam 30 can be welded to both sides of the rear floor structure 10 along the vehicle width direction, and to both ends of the front beam 20 by welding.

[0081] In some embodiments, the rear crossbeam 40 may be configured to be spaced apart from the rear portion of the front crossbeam 20. The rear crossbeam 40 may be connected to the upper portion of the rear floor structure 10 in the vehicle width direction.

[0082] In some embodiments, the rear crossbeam 40 may be configured to form an upward shape at both edge ends along the longitudinal direction of the vehicle. For example, the rear crossbeam 40 may be configured as a component made of steel.

[0083] In some embodiments, this rear crossbeam 40 can be welded to the upper part of the rear floor panel 11.

[0084] In some embodiments, the length of the rear crossbeam 40 may be less than the length of the front crossbeam 20. One end of the rear crossbeam 40 along the vehicle width direction may be connected to one side of the rear floor structure 10 along the vehicle width direction. Furthermore, the rear crossbeam 40 may be spaced apart from the other side of the rear floor structure 10 along the vehicle width direction. That is, in some embodiments, the other end of the rear crossbeam 40 along the vehicle width direction may be spaced apart from the other side of the rear floor structure 10.

[0085] Figure 7 This is a view showing the mounting portion of the pressure plate applied to the lower structure of the vehicle body according to an example embodiment.

[0086] like Figure 7 As shown, in some embodiments, pressure plate mounting portions 21, 31 and 41 may be provided in the front crossbeam 20, the extension crossbeam 30 and the rear crossbeam 40, respectively.

[0087] In some embodiments, the pressure plate mounting portions 21, 31, 41 are configured to mount the rear pressure plate 90 (described later) onto the front crossbeam 20, the extension crossbeam 30, and the rear crossbeam 40.

[0088] In some embodiments, the shock absorber bracket 50 may be configured to mount a shock absorber and enhance the stiffness of the rear crossbeam 40 along the vehicle width direction.

[0089] In some embodiments, the shock absorber bracket 50 may be connected to one side of the rear floor structure 10 along the vehicle width direction. The shock absorber bracket 50 may also be connected to one end of the rear crossbeam 40 along the vehicle width direction.

[0090] In some embodiments, the shock absorber bracket 50 may be configured in a shape formed at the edge along the width direction of the vehicle. For example, the shock absorber bracket 50 may be configured as a bracket made of steel.

[0091] In some embodiments, the shock absorber bracket 50 can be welded to one side of the rear floor structure 10 and can also be welded to one end of the rear crossbeam 40.

[0092] In some embodiments, the first longitudinal beam 60 may be configured to enhance the rear-end collision stiffness of the vehicle.

[0093] In some embodiments, the first longitudinal beam 60 may be connected to one side of the front crossbeam 20 and to the upper part of the rear floor structure 10. The first longitudinal beam 60 may be connected longitudinally to the rear crossbeam 40.

[0094] In some embodiments, the first longitudinal beam 60 may be configured to extend upwards at both edge ends along the vehicle width direction. For example, the first longitudinal beam 60 may be a component made of steel.

[0095] In some embodiments, the front end of the first longitudinal beam 60 along the longitudinal direction of the vehicle can be welded to the connection between the front crossbeam 20 and the extension crossbeam 30 along the width direction of the vehicle on one side of the rear floor structure 10.

[0096] In some embodiments, the rear end of the first longitudinal beam 60 along the longitudinal direction of the vehicle can be welded to the connection between the rear cross beam 40 and the shock absorber bracket 50 along the width direction of the vehicle on one side of the rear floor structure 10.

[0097] In some embodiments, the first longitudinal beam 60 can be welded to the upper part of the rear floor panel 11 between the front crossbeam 20 and the rear crossbeam 40.

[0098] In some embodiments, the second longitudinal beam 70 may be configured together with the first longitudinal beam 60 to enhance the rear-end collision stiffness of the vehicle.

[0099] In some embodiments, the second longitudinal beam 70 may be connected along the longitudinal direction of the vehicle to the other side of the front crossbeam 20 and the upper part of the rear floor structure 10.

[0100] In some embodiments, the second longitudinal beam 70 may be configured to extend upwards at both edge ends along the vehicle width direction. For example, the second longitudinal beam 70 may be a component made of steel.

[0101] In some embodiments, the front end of the second longitudinal beam 70 can be welded to the front crossbeam 20 along the vehicle width direction on the other side of the rear floor structure 10. The second longitudinal beam 70 can be welded to the upper part of the rear floor panel 11.

[0102] In some embodiments, the extended longitudinal beam 80 may be configured to enhance the stiffness of the second longitudinal beam 70 along the longitudinal direction of the vehicle.

[0103] In some embodiments, the extension beam 80 may be connected to the second longitudinal beam 70 along the longitudinal direction of the vehicle and may be connected to the upper part of the rear floor structure 10.

[0104] In some embodiments, the extended longitudinal beam 80 may be configured to extend upwards at both edge ends along the vehicle width direction. For example, the extended longitudinal beam 80 may be a component made of steel.

[0105] In some embodiments, the front end of the extension longitudinal beam 80 can be welded to the rear end of the second longitudinal beam 70 along the vehicle width direction on the other side of the rear floor structure 10. The extension longitudinal beam 80 can be welded to the upper part of the rear floor panel 11.

[0106] In some embodiments, the second longitudinal beam 70 and the extended longitudinal beam 80 may be disposed along the longitudinal direction of the vehicle between the other end of the rear crossbeam 40 and the other side of the rear floor structure 10.

[0107] In some embodiments, the rear pressure plate 90 may be configured to ensure ample interior space, mobility for the wheelchair 6 to enter the vehicle, and support rigidity for the wheelchair 6.

[0108] In some embodiments, the rear pressure plate 90 may be connected to the front crossbeam 20, the extension crossbeam 30, and the rear crossbeam 40, thereby forming a flat floor surface on the upper side of the rear floor structure 10.

[0109] In some embodiments, the rear pressure plate 90 may be configured as a plate material made of steel. The rear pressure plate 90 may be mounted on pressure plate mounting portions 21, 31 and 41 respectively provided on the front crossbeam 20, the extension crossbeam 30 and the rear crossbeam 40.

[0110] In some embodiments, the rear pressure plate 90 can be as follows: Figure 7 As shown, it is fixed to the pressure plate mounting parts 21, 31 and 41 by fastening members including bolts, nuts and the like.

[0111] In some embodiments, the pressure plate mounting portions 21, 31, and 41 may include a weld nut WN1 connected to each of the front crossbeam 20, the extension crossbeam 30, and the rear crossbeam 40.

[0112] In some embodiments, the rear pressure plate 90 may be connected along the longitudinal direction of the vehicle to the same plane as the central pressure plate 9 covering the ramp module 5 embedded or inserted into the central floor structure 7.

[0113] Figure 8 This is a bottom perspective view showing the lower structure of the vehicle body according to an example embodiment. Figure 9 This is a cross-sectional view showing the lower structure of the vehicle body according to an example embodiment.

[0114] Reference Figures 4 to 9 In some embodiments, the lower structure 10 of the vehicle body may further include a front transverse member 13, a middle transverse member 15 and a rear transverse member 17 disposed in the rear floor structure 10.

[0115] In some embodiments, the front transverse member 13, the middle transverse member 15, and the rear transverse member 17 can be used to enhance the rigidity of the rear floor panel 11.

[0116] In some embodiments, the front transverse member 13 may be positioned along the vehicle width direction at the lower front part of the rear floor structure 10, corresponding to the position of the front crossbeam 20.

[0117] In some embodiments, the front transverse member 13 may be configured to form a shape that extends downward at both edge ends along the longitudinal direction of the vehicle. For example, the front transverse member 13 may be configured as a member made of steel.

[0118] In some embodiments, the front transverse member 13 can be welded to the lower surface of the rear floor panel 11 along the vehicle width direction.

[0119] In some embodiments, the front crossbeam 20 may be connected to the upper front portion of the rear floor panel 11, and the front cross member 13 may be connected to the lower front portion of the rear floor panel 11.

[0120] Therefore, as Figure 9 As shown, in some embodiments, each of the front crossbeam 20 and the front cross member 13 may form closed sections 24, 14 that connect to the upper and lower portions of the rear floor panel 11.

[0121] In some embodiments, the intermediate transverse member 15 may be disposed along the vehicle width direction at the lower part of the rear floor structure 10 at a position corresponding to the position of the rear crossbeam 40.

[0122] In some embodiments, the intermediate transverse member 15 may be configured to be shaped to extend downwards at both edge ends along the longitudinal direction of the vehicle. For example, the intermediate transverse member 15 may be configured to be a member made of steel.

[0123] In some embodiments, the intermediate transverse member 15 can be welded to the lower surface of the rear floor panel 11 along the vehicle width direction.

[0124] In some embodiments, the rear crossbeam 40 may be connected to the upper part of the rear floor panel 11, and the intermediate cross member 15 may be connected to the lower part of the rear floor panel 11.

[0125] Therefore, as Figure 9 As shown, in some embodiments, each of the rear crossbeam 40 and the intermediate cross member 15 may form closed sections 46, 16 connecting the upper and lower portions of the rear floor panel 11.

[0126] In some embodiments, the rear transverse member 17 may be disposed at the lower rear of the rear floor structure 10 along the vehicle width direction.

[0127] In some embodiments, the rear transverse member 17 may be configured to be shaped to extend downward at both edge ends along the longitudinal direction of the vehicle. For example, the rear transverse member 17 may be configured to be a member made of steel.

[0128] In some embodiments, the rear transverse member 17 can be welded to the lower surface of the rear floor panel 11 along the vehicle width direction.

[0129] Figure 10This is a view showing a seat mounting section applied to the lower structure of a vehicle body according to an example embodiment.

[0130] Reference Figure 10 In some embodiments, the lower structure 100 of the vehicle body may further include a first seat mounting portion 101 and a second seat mounting portion 111 disposed in the rear floor structure 10.

[0131] like Figure 1 and Figure 3 As shown, in some embodiments, the first seat mounting portion 101 and the second seat mounting portion 111 may be configured to mount the rear seat assembly 3 on the upper part of the rear floor structure 10.

[0132] like Figure 4 As shown, in some embodiments, the first seat mounting portion 101 and the second seat mounting portion 111 may be exposed and not covered by the rear pressure plate 90.

[0133] like Figure 5 , Figure 8 and Figure 9 As shown, in some embodiments, the first seat mounting part 101 may be provided in the rear floor structure 10 at a position corresponding to the rear transverse member 17.

[0134] like Figure 10 As shown, in some embodiments, the first seat mounting portion 101 may include a first seat mounting plate 105 and a first seat mounting fastener 107.

[0135] For example, the first seat mounting plate 105 can be configured as a plate made of steel. The first seat mounting plate 105 can be welded to the upper part of the rear floor panel 11 at a predetermined position on the rear floor structure 10, for example, at a position corresponding to the other side of the rear floor structure 10.

[0136] In some embodiments, the first seat mounting plate 105 may be welded to the rear end of the extension longitudinal beam 80.

[0137] In some embodiments, a first seat mounting fastener 107 may be disposed in the rear floor panel 11 at a position corresponding to the first seat mounting plate 105. The first seat mounting fastener 107 may include a weld nut WN2 connected to the rear floor panel 11.

[0138] In some embodiments, the welding nut WN2 may be connected to the first fastening hole 106 formed in the first seat mounting plate 105.

[0139] like Figure 5 , Figure 8 and Figure 9As shown, in some embodiments, the second seat mounting part 111 may be provided in the rear floor structure 10 at a position corresponding to the intermediate transverse member 15.

[0140] In some embodiments, the second seat mounting portion 111 may include a second seat mounting plate 113 and a second seat mounting fastener 115.

[0141] For example, the second seat mounting plate 113 can be configured as a plate made of steel. The second seat mounting plate 113 can be welded to the upper part of the rear floor panel 11 at a predetermined position of the rear floor structure 10, for example, between the other end of the rear crossbeam 40 and the other side of the rear floor structure 10.

[0142] In some embodiments, the second seat mounting plate 113 can be welded to the other end of the rear crossbeam 40. For example, the connection between the second longitudinal beam 70 and the extended longitudinal beam 80 can be welded to the upper part of the second seat mounting plate 113.

[0143] In some embodiments, the second seat mounting fastener 115 may be located in the rear floor panel 11 at a position corresponding to the second seat mounting plate 113. For example, as... Figure 10 As shown, the second seat mounting fastener 115 may include a weld nut WN3 connected to the rear floor panel 11.

[0144] In some embodiments, the welding nut WN3 may be connected to the second fastening hole 114 formed in the second seat mounting plate 113.

[0145] Therefore, as Figure 1 and Figure 3 As shown, in some embodiments, the rear seat assembly 3 can be secured to the first seat mounting fastener 107 and the second seat mounting fastener 115 by fastening members including bolts, nuts, etc.

[0146] In some embodiments, bolts can be fixed to welding nuts WN2 and WN3 through the first fastening hole 106 of the first seat mounting plate 105 and the second fastening hole 114 of the second seat mounting plate 113.

[0147] Reference Figure 3 In some embodiments, the lower structure 100 of the vehicle body may include at least one anchor 121 mounted on the rear pressure plate 90.

[0148] In some embodiments, at least one anchor 121 may be configured to secure or restrain the wheelchair 6 (for a person with mobility impairment) to the rear pressure plate 90.

[0149] Figure 11This is a view showing the anchoring mounting portion applied to the lower structure of the vehicle body according to an example embodiment.

[0150] Reference Figure 3 and Figure 11 In some embodiments, at least one anchoring mounting part 123 may be respectively provided on the first longitudinal beam 60 and the second longitudinal beam 70.

[0151] In some embodiments, at least one anchoring mounting portion 123 may be configured to mount at least one anchor 121 onto the rear pressure plate 90.

[0152] In some embodiments, at least one anchor 121 may be fastened to at least one anchor mounting portion 123 by means of fastening members including bolts, nuts, etc.

[0153] like Figure 11 As shown, in some embodiments, at least one anchoring mounting portion 123 may include welded nuts WN4 respectively connected to the first longitudinal beam 60 and the second longitudinal beam 70.

[0154] like Figure 3 As shown, some embodiments may include a removable strap 131. The removable strap 131 may be installed in the rear seat assembly 3. In some embodiments, the removable strap 131 secures the wheelchair 6 and can protect a person with limited mobility who is using the wheelchair 6.

[0155] Next, we will refer to Figures 1 to 11 The assembly process and operation of the lower structure 100 of the vehicle body according to some embodiments of the above-described construction are described in detail.

[0156] In some embodiments, a base body 1a of various vehicle types may be provided. The base body 1a may include a central floor structure 7 and a rear floor structure 10.

[0157] In some embodiments, the rear floor structure 10 includes a front transverse member 13, a middle transverse member 15, and a rear transverse member 17, which are connected to the lower portion of the rear floor panel 11 along the vehicle width direction (see, for example...). Figure 9 ).

[0158] In some embodiments, at a position corresponding to the rear transverse member 17, the first seat mounting fastener 107 of the first seat mounting portion 101 can be connected to the rear floor panel 11.

[0159] In some embodiments, at a position corresponding to the intermediate transverse member 15, the second seat mounting fastener 115 of the second seat mounting portion 111 can be connected to the rear floor panel 11.

[0160] The following components can be provided: front crossbeam 20, extension crossbeam 30, rear crossbeam 40, shock absorber bracket 50, first longitudinal beam 60, second longitudinal beam 70, and extension longitudinal beam 80.

[0161] In some embodiments, the pressure plate mounting portions 21, 31, and 41 may be connected to each of the front crossbeam 20, the extension crossbeam 30, and the rear crossbeam 40. In some embodiments, at least one anchoring mounting portion 123 may be connected to each of the first longitudinal beam 60 and the second longitudinal beam 70.

[0162] In some embodiments, a first seat mounting plate 105 of the first seat mounting portion 101 and a second seat mounting plate 113 of the second seat mounting portion 111 may be provided.

[0163] In this state, for example, at the position corresponding to the first seat mounting fastener 107, the first seat mounting plate 105 can be welded to the upper part of the rear floor panel 11.

[0164] Furthermore, for example, at the position corresponding to the second seat mounting fastener 115, the second seat mounting plate 113 can be welded to the upper part of the rear floor panel 11.

[0165] The front crossbeam 20 can be welded to the upper front of the rear floor panel 11 along the vehicle width direction between the two sides of the rear floor structure 10.

[0166] The front crossbeam 20 can be positioned corresponding to the front cross member 13. Therefore, in some embodiments, the front crossbeam 20 forms a closed section 24 connected to the upper part of the rear floor panel 11, and the front cross member 13 can form a closed section 14 connected to the lower part of the rear floor panel 11.

[0167] The extension beams 30 can be welded to each of the two sides of the rear floor structure 10 along the vehicle width direction. Additionally, for example, each extension beam 30 can be welded to both ends of the front beam 20.

[0168] In some embodiments, the shock absorber bracket 50 can be welded to one side of the rear floor structure 10 along the vehicle width direction.

[0169] In some embodiments, the rear crossbeam 40 can be welded to the shock absorber bracket 50 and can be welded to the upper part of the rear floor panel 11 along the vehicle width direction.

[0170] In some embodiments, one end of the rear crossbeam 40 may be connected to the shock absorber bracket 50. The other end of the rear crossbeam 40 may be welded to the second seat mounting plate 113 and may be spaced apart from the other side of the rear floor structure 10.

[0171] In some embodiments, the rear crossbeam 40 may be positioned corresponding to the intermediate cross member 15. Therefore, in some embodiments, the rear crossbeam 40 forms a closed section 46 connected to the upper part of the rear floor panel 11, and the intermediate cross member 15 may form a closed section 16 connected to the lower part of the rear floor panel 11.

[0172] In some embodiments, the first longitudinal beam 60 may be welded to the upper part of the rear floor panel 11 along the longitudinal direction of the vehicle on one side of the rear floor structure 10 along the vehicle width direction.

[0173] In some embodiments, the front end of the first longitudinal beam 60 can be welded to the connection or joint between the front crossbeam 20 and the extension crossbeam 30. The rear end of the first longitudinal beam 60 can be welded to the connection or joint between the rear crossbeam 40 and the shock absorber bracket 50.

[0174] In some embodiments, the extended longitudinal beam 80 may be welded to the upper part of the rear floor panel 11 along the vehicle longitudinal direction on the other side of the rear floor structure 10 along the vehicle width direction.

[0175] In some embodiments, the front end of the extended longitudinal beam 80 can be welded to the second seat mounting plate 113. The rear end of the extended longitudinal beam 80 can be welded to the first seat mounting plate 105.

[0176] In some embodiments, the second longitudinal beam 70 may be welded to the upper part of the rear floor panel 11 along the longitudinal direction of the vehicle on the other side of the rear floor structure 10 along the vehicle width direction.

[0177] In some embodiments, the front end of the second longitudinal beam 70 may be welded to the front crossbeam 20. The rear end of the second longitudinal beam 70 may be welded to the front end of the extension longitudinal beam 80.

[0178] In some embodiments, the connection or joint between the second longitudinal beam 70 and the extended longitudinal beam 80 can be welded to the upper part of the second seat mounting plate 113. The connection between the second longitudinal beam 70 and the extended longitudinal beam 80 can be located at a position corresponding to the intermediate transverse member 15.

[0179] In some embodiments, the interconnected second longitudinal beam 70 and the extended longitudinal beam 80 may be disposed between the other end of the rear crossbeam 40 and the other side of the rear floor structure 10.

[0180] In some embodiments, the assembly process described above can be performed, for example, on a body assembly line to assemble the body 1 in a body-in-white (BIW) state. In some embodiments, the body 1 assembled on the body assembly line can be transferred to an interior assembly line.

[0181] On the interior assembly line, in some embodiments, the ramp module 5 can be embedded in the central floor structure 7 of the base vehicle body 1a. In some embodiments, a central pressure plate 9 covering the ramp module 5 can be installed in the central floor structure 7.

[0182] In some embodiments, the rear pressure plate 90 can be bolted to the pressure plate mounting portions 21, 31, and 41 of the front crossbeam 20, the extension crossbeam 30, and the rear crossbeam 40.

[0183] In some embodiments, the rear pressure plate 90 may be connected along the longitudinal direction of the vehicle to the same plane as the central pressure plate 9.

[0184] In some embodiments, at least one anchor 121 may be bolted to at least one anchoring mounting portion 123 of the first longitudinal beam 60 and the second longitudinal beam 70.

[0185] In some embodiments, the rear seat assembly 3 can be bolted to the first seat mounting fastener 107 and the second seat mounting fastener 115 via the first seat mounting plate 105 and the second seat mounting plate 113.

[0186] According to the lower structure 100 of the vehicle body assembled by a series of assembly processes described in accordance with some embodiments of the present disclosure, a wheelchair 6 for persons with mobility impairments can enter the central pressure plate 9 and the rear pressure plate 90 via the ramp module 5.

[0187] Therefore, according to some embodiments, the lower structure 100 of the vehicle body can ensure a spacious interior space through the rear pressure plate 90, and can also ensure the mobility of the wheelchair 6 to enter the vehicle.

[0188] According to some embodiments of the vehicle body lower structure 100, the rear pressure plate 90 can be mounted on the front crossbeam 20 and the extension crossbeam 30 on the front cross member 13 and the rear crossbeam 40 on the intermediate cross member 15, supported by the first longitudinal beam 60 and the second longitudinal beam 70.

[0189] Thus, the lower structure 100 of the vehicle body according to some embodiments can ensure the mounting rigidity of the rear pressure plate 90 and enhance the support rigidity of the passenger and wheelchair 6.

[0190] According to some embodiments of the vehicle body's lower structure 100, a wheelchair 6 that enters the vehicle interior can be secured or restrained to the rear pressure plate 90 by at least one anchor 121.

[0191] At least one anchor 121 may be installed on the first longitudinal beam 60 and the second longitudinal beam 70, which are connected to the front crossbeam 20 and the rear crossbeam 40.

[0192] Therefore, the lower structure 100 of the vehicle body according to some embodiments can enhance the installation rigidity of the anchors used to secure the wheelchair 6.

[0193] According to some embodiments of the vehicle body lower structure 100, the rear seat assembly 3 can be mounted on a first seat mounting portion 101 on the rear transverse member 17 and a second seat mounting portion 111 on the intermediate transverse member 15.

[0194] Therefore, the lower structure 100 of the vehicle body according to some embodiments can enhance the installation rigidity of the rear seat assembly 3.

[0195] Furthermore, in some embodiments of the vehicle body's lower structure 100, the first longitudinal beam 60 and the second longitudinal beam 70 are connected along the vehicle's longitudinal direction to the front crossbeam 20 and the rear crossbeam 40.

[0196] Therefore, the lower structure 100 of the vehicle body according to some embodiments can enhance the rear collision performance of the vehicle, prevent the rear seat assembly 3 from being lifted by the rear collision load, and minimize damage to the battery installed in the central floor structure 7.

[0197] Furthermore, according to some embodiments of the vehicle body lower structure 100, since the rear floor structure 10 of the base vehicle body 1a uses a component made of steel for people with mobility impairments to ride in, price competitiveness can be ensured.

[0198] Furthermore, according to some embodiments, the lower structure 100 of the vehicle body can share the rear floor structure 10 of various vehicle models as much as possible without changing the basic body 1a structure, and can be modified into a vehicle that is convenient for people with mobility impairments to ride in.

[0199] Therefore, the lower structure 100 of the vehicle body according to some embodiments can ensure that the vehicle body can be expanded according to the purpose and use cases of the PBV, can be produced in combination according to the vehicle body specifications, and can respond to the multi-specification PBV market.

[0200] While some exemplary embodiments disclosed above have been described, this disclosure is not necessarily limited thereto, and various modifications can be made to other embodiments of this disclosure within the scope of the claims and their equivalents.

Claims

1. A lower structure for a vehicle body, comprising: Rear floor structure; The front crossbeam is connected to the upper front part of the rear floor structure along the vehicle width direction; The rear crossbeam is configured to be spaced apart from the front crossbeam and connected to the upper part of the rear floor structure along the vehicle width direction; as well as A rear pressure plate is located on the front crossbeam and the rear crossbeam, and is connected to the front crossbeam and the rear crossbeam.

2. The lower structure according to claim 1, wherein, The rear floor structure is part of the base vehicle body.

3. The lower structure according to claim 1, further comprising: Central floor structure; The ramp module is embedded in the central floor structure; as well as A central pressure plate covers the ramp module. The rear pressure plate is adjacent to and aligned with the central pressure plate.

4. The lower structure according to claim 1, further comprising two extending crossbeams, the two extending crossbeams being respectively connected to both sides of the rear floor structure along the vehicle width direction and to both ends of the front crossbeam.

5. The lower structure according to claim 4 further includes a pressure plate mounting portion, the pressure plate mounting portion being disposed on the front crossbeam, the rear crossbeam and the extension crossbeam.

6. The lower structure according to claim 1, further comprising a shock absorber bracket connected to one side of the rear floor structure along the vehicle width direction, wherein the rear crossbeam is connected to the shock absorber bracket.

7. The lower structure according to claim 6, wherein, The first length of the rear crossbeam is less than the second length of the front crossbeam, and The rear crossbeam is configured to be spaced apart from the other side of the rear floor structure along the vehicle width direction.

8. The lower structure according to claim 1, further comprising: A front transverse member is disposed at the lower front part of the rear floor structure along the vehicle width direction, located below the front crossbeam and at a first position corresponding to the front crossbeam; The intermediate transverse member is disposed at the lower part of the rear floor structure along the width direction of the vehicle, located below the rear crossbeam and at a second position corresponding to the rear crossbeam; as well as The rear transverse member is disposed at the lower rear part of the rear floor structure along the width direction of the vehicle.

9. The lower structure according to claim 8, wherein, Each of the front crossbeam and the front cross member forms a closed section at the top and bottom of the rear floor panel, respectively, which is connected to the rear floor structure.

10. The lower structure according to claim 9, wherein, Each of the rear crossbeam and the intermediate cross member forms a closed section connecting the upper and lower parts of the rear floor panel, respectively.

11. The lower structure according to claim 1, further comprising: A first longitudinal beam extends along the longitudinal direction of the vehicle, wherein the first longitudinal beam is connected to one side of the front crossbeam and the upper part of the floor structure, and the first longitudinal beam is connected to the rear crossbeam; as well as The second longitudinal beam extends along the longitudinal direction of the vehicle, connects to the other side of the front crossbeam, and connects to the upper part of the rear floor structure.

12. The lower structure according to claim 11, wherein: The first length of the rear crossbeam is less than the second length of the front crossbeam; One end of the rear crossbeam is connected to one side of the rear floor structure along the vehicle width direction; and The other end of the rear crossbeam is spaced apart from the other side of the rear floor structure along the vehicle width direction.

13. The lower structure according to claim 12, wherein, The second longitudinal beam is disposed along the longitudinal direction of the vehicle between the other end of the rear crossbeam and the other side of the rear floor structure.

14. The lower structure of claim 11, further comprising an extending longitudinal beam connected to the second longitudinal beam along the longitudinal direction of the vehicle and connected to the upper part of the rear floor structure.

15. The lower structure according to claim 11, further comprising: A front transverse member is disposed at the lower front part of the rear floor structure along the vehicle width direction, located below the front crossbeam and at a first position corresponding to the front crossbeam; The intermediate transverse member is disposed at the lower part of the rear floor structure along the width direction of the vehicle, located below the rear crossbeam and at a second position corresponding to the rear crossbeam; as well as The rear transverse member is disposed at the lower rear part of the rear floor structure along the width direction of the vehicle.

16. The lower structure according to claim 15, further comprising: The first seat mounting part is disposed at a first predetermined position on the rear floor structure corresponding to the rear transverse member; An extension longitudinal beam extends along the longitudinal direction of the vehicle, connects to the second longitudinal beam, and connects to the first seat mounting portion; as well as The second seat mounting portion is disposed at a second predetermined position on the rear floor structure corresponding to the intermediate transverse member, wherein the second longitudinal beam and the extended longitudinal beam are connected to the second seat mounting portion.

17. The lower structure according to claim 11, further comprising at least one anchoring mounting portion disposed on each of the first longitudinal beam and the second longitudinal beam.

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