Side frame for vehicle and vehicle floor including same

Abstract

The present invention provides a side frame for a vehicle, which is reinforced to minimize deformation during a vehicle collision. In an embodiment, the side frame for a vehicle comprises: an outer frame disposed on the outer side in a width direction; an inner frame coupled to the outer frame and forming a hollow portion having a closed cross-sectional shape together with the outer frame; and a plurality of reinforcing frames coupled to the outer frame in the hollow portion and spaced apart from each other along the extension direction of the outer frame. Each of the reinforcing frames includes an intersecting sidewall intersecting the extension direction of the outer frame, and is coupled to the side surface of the outer frame and the side surface of the inner frame.

Description

Vehicle side frame and vehicle floor including the same

[0001] The present invention relates to a vehicle side frame and a vehicle floor including the same.

[0002] It should be noted that the content described in this section merely provides background information regarding the present invention and does not constitute prior art.

[0003] Generally, internal combustion engine body-on-frame vehicles employ a ladder-shaped frame. It is common for significant internal deformation to occur within the frame of such vehicles during a side collision.

[0004] This means that if the battery pack is positioned between the frames during conversion to an electric vehicle, there is a very high possibility that battery damage will occur due to frame deformation.

[0005] Furthermore, if the side frames are spread further outward to secure space for the battery, internal deformation within the frame is inevitably more severe, making structural reinforcement essential to prevent damage to the battery pack.

[0006] (Patent Document 1) JP 2020-202147 A

[0007] In one aspect, the present invention aims to provide a vehicle side frame reinforced to minimize deformation during a vehicle collision and a floor including the same.

[0008] To achieve the above objectives, the present invention provides a vehicle side frame as follows.

[0009] In one embodiment, the present invention provides a vehicle side frame comprising: an outer frame disposed on the outer side in the width direction; an inner frame coupled to the outer frame and forming a hollow portion with a closed cross-section shape together with the outer frame; and a plurality of reinforcing frames coupled to the outer frame in the hollow portion and spaced apart along the extension direction of the outer frame; wherein the reinforcing frames include a cross side wall intersecting the extension direction of the outer frame, and the side frame is coupled to the side of the outer frame and the side of the inner frame.

[0010] In one embodiment, the reinforcing frame may also be combined with the upper and lower surfaces of the closed cross-section.

[0011] In one embodiment, the closed cross section is a square cross section, and the reinforcing frame can contact all four sides of the square cross section, and the outer frame includes an upper surface, a lower surface and a side connecting the upper surface and the lower surface, and the reinforcing frame can contact the upper surface, the lower surface and the side.

[0012] In one embodiment, the reinforcing frame may include a pair of intersecting side walls that are welded to the side, bottom, and top surfaces and spaced apart in the longitudinal direction; and a connecting side wall that connects the pair of intersecting side walls.

[0013] In one embodiment, the reinforcing frame may further include a reinforcing flange formed to extend in an extended direction along the side at the portion where the cross side wall is joined to the side; or may further include an inwardly curved portion disposed on the connecting side wall and inserted toward the side of the outer frame from the connecting side wall.

[0014] In one embodiment, the cross side wall may be combined with the outer frame, and the connecting side wall may be combined with the inner frame.

[0015] In one embodiment, the cross side wall is welded to the outer frame, and the connecting side wall may be bonded to the inner frame, and the cross side wall is welded to the outer frame, and the connecting side wall is welded to the inner frame, and the inner frame may include a through hole formed on the side of the inner frame for welding with the connecting side wall.

[0016] In one embodiment, the floor of a vehicle comprises: a battery frame having a battery receiving space formed therein; a floor panel coupled to the battery frame and disposed on the battery receiving space; a plurality of floor cross members extending in the width direction of the vehicle body and coupled to the lower surface of the floor panel; and a pair of sill sides coupled to both sides of the battery frame, wherein the battery frame is a roof frame including the aforementioned vehicle side frame.

[0017] In one embodiment, along the longitudinal direction of the vehicle body, the reinforcing frame may be positioned at a location corresponding to the floor cross member or at an intermediate location between the floor cross members.

[0018] In one embodiment, the loop frame includes a front frame connected to the front and a rear frame connected to the rear in the extension direction of the side frame, and the reinforcing frame may also be disposed inside the front frame and the rear frame.

[0019] According to one embodiment of the present invention, a vehicle side frame has the effect of minimizing deformation during a side collision of a vehicle.

[0020] According to one embodiment of the present invention, a vehicle side frame has the effect of protecting a battery placed inside the frame by minimizing deformation.

[0021] According to one embodiment of the present invention, a vehicle floor can provide a vehicle floor that minimizes deformation of the space accommodating the battery during a side collision.

[0022] FIG. 1 is a perspective view of a vehicle floor according to an embodiment of the present invention.

[0023] Figure 2 is a bottom perspective view of the vehicle floor of Figure 1.

[0024] Figure 3 is an enlarged view of part A of the vehicle floor of Figure 1.

[0025] Figure 4 is a partial cross-sectional view of the vehicle floor of Figure 1.

[0026] FIG. 5 is a perspective view of the vehicle side frame components disassembled from the vehicle floor of FIG. 1.

[0027] FIG. 6 is a perspective view of the vehicle floor of FIG. 1 in which the components of the vehicle side frame are partially combined.

[0028] FIG. 7 is a drawing illustrating another embodiment in which the outer frame and reinforcing frame of the vehicle side frame of the present invention are combined.

[0029] FIG. 8 is a drawing illustrating another embodiment in which the outer frame and the reinforcing frame of the vehicle side frame of the present invention are combined.

[0030] FIG. 9 is a perspective view of a vehicle floor according to another embodiment of the present invention.

[0031] FIG. 10 is a partial cross-sectional view of the vehicle floor of FIG. 9.

[0032] Preferred embodiments of the present invention will be described below with reference to the attached drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below.

[0033] In addition, embodiments of the present invention are provided to more fully explain the present invention to those with average knowledge in the relevant technical field.

[0034] In drawings, the shapes and sizes of elements may be exaggerated for clearer explanation.

[0035] In describing the embodiments of the present invention, if it is determined that a detailed description of known technology related to the present invention may unnecessarily obscure the essence of the present invention, such detailed description will be omitted. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of the user or operator. Therefore, such definitions should be based on the content throughout this specification. The terms used in the detailed description are merely for describing the embodiments of the present invention and should not be limited in any way. Unless explicitly stated otherwise, expressions in the singular form include the meaning of the plural form.

[0036] In this description, expressions such as “include” or “equipped” are intended to refer to certain characteristics, numbers, steps, actions, elements, parts or combinations thereof, and should not be interpreted to exclude the existence or possibility of one or more other characteristics, numbers, steps, actions, elements, parts or combinations thereof other than those described.

[0037] Unless otherwise specifically defined in the specification of the present invention, % units mean weight %.

[0038] In this specification, terms such as 'top', 'upper', 'upper surface', 'lower', 'lower surface', 'lower surface', and 'side surface' are based on the drawings and may actually vary depending on the direction in which the elements or components are arranged.

[0039] Additionally, throughout the specification, when it is said that one part is 'connected' to another part, this includes not only cases where they are 'directly connected,' but also cases where they are 'indirectly connected' with other elements in between.

[0040] The present invention will be described in detail below through each embodiment or example of the invention. It should be noted that each embodiment or example described in this specification is not limited to a single embodiment or example, but may also be combined with other embodiments or examples. Accordingly, the citation of claims in the patent claims is merely an example of an embodiment, and the technical concept of the present invention should not be interpreted as being limited only to a combination with the cited claims; rather, combinations with various claims are also included within the scope of the technical concept of the present invention.

[0041] FIG. 1 shows a perspective view of a vehicle floor according to an embodiment of the present invention, FIG. 2 shows a bottom perspective view of the vehicle floor of FIG. 1, FIG. 3 shows an enlarged view of part A of the vehicle floor of FIG. 1, and FIG. 4 shows a partial cross-sectional view of the vehicle floor of FIG. 1.

[0042] In this specification, the term "vehicle" refers to various vehicles, such as electric vehicles, that receive power from a battery and transport a transported object, such as a person, animal, or object, from a source to a destination. Such vehicles are not limited to vehicles that travel on roads or railways.

[0043] Additionally, in this specification, the longitudinal direction is defined as the first direction (X) with respect to the vehicle body, the width direction is defined as the second direction (Y), and the height direction is defined as the third direction (Z). When only the side frame is mentioned, the first direction (X) refers to the extension direction of the side frame.

[0044] A floor (1) of a vehicle according to one embodiment of the present invention may include a battery frame (40), a floor panel (50), and at least one floor cross member (60).

[0045] The battery frame (40) includes a side frame (10) positioned on both sides in the width direction of the vehicle, a front frame (20) connected to the front of the side frame (10), and a rear frame (30) connected to the rear of the side frame (10). The battery frame (40) may be a loop frame formed integrally along the perimeter of a battery receiving space (S). A receiving space (S) is formed inside the battery frame (40).

[0046] The battery frame (40) can accommodate and mount a battery pack (not shown). To this end, the battery frame (40) may have a battery receiving space (S) formed inside.

[0047] Due to the structural characteristics of the vehicle, the battery frame (40) has a limitation that its length in the second direction (Y) cannot exceed the width of the vehicle. Therefore, the length of the battery frame (40) in the second direction is set to be as close as possible to the width of the vehicle, and structural collision with other components constituting the vehicle must not occur.

[0048] The battery frame (40) may have a roughly rectangular shape when viewed from the third direction (Z), but the shape of the battery frame (40) is not necessarily limited to this and may have various shapes. The connection portions between each frame (10, 20, 30) of the battery frame (40) may be formed rounded or sloped so that they are smoothly connected to each other and processability can be improved.

[0049] The floor panel (50) is attached to one side of the battery frame (40) and can be placed on the battery receiving space (S). In this way, the floor panel (50) can cover and close one side of the two open sections of the battery frame (40), that is, one side of the battery receiving space. The floor panel can serve as the floor inside the vehicle cabin in the finished vehicle body.

[0050] Specifically, as illustrated in FIGS. 1 and 2, the floor panel (50) is formed from a plate and can be coupled and fixed to the side frame (10), front frame (20), and rear frame (30) constituting the battery frame (40). The floor panel (50) may have a size that does not protrude from the battery frame (40), but is not necessarily limited thereto.

[0051] In this way, since the floor panel (50) is fixed to the open side of the battery frame (40), the floor panel can perform the role of adding rigidity to prevent deformation of the battery frame when an impact load is applied to the battery frame.

[0052] The floor panel (50) and the battery frame (40) can be strongly joined by a joining method such as mechanical joining or welding. For mechanical joining, pin joining or bolting may be employed. Alternatively, the edge portion of the floor panel (50) may be welded to a flange extending from each frame (10, 20, 30) toward the inside of the battery frame (50), for example, the upper surface (11b) of the side frame (10).

[0053] On the inner side of the floor panel (50), a plurality of floor cross members (60) extending in the second direction (Y) are spaced apart along the first direction (X). The floor cross members (60) can be positioned to protrude within the battery receiving space (S).

[0054] The floor cross member (60) can have a roughly hat-shaped cross section by forming a single plate by bending it to have a U-shaped cross section, and then bending both ends in the opposite direction to the previous bending direction to form a flange (61). However, the shape of the floor cross member (30) is not necessarily limited to the example described above. For example, the floor cross member may have a square cross section with all four sides closed, or a corrugated or curved shape may be formed on the surface parallel to the floor panel (20) along the width direction of the floor cross member (60), that is, the length direction of the vehicle body, i.e., the first direction (X).

[0055] The floor cross member (60) and the floor panel (50) can be strongly joined by welding or other joining methods. After the flange (61) of the floor cross member comes face-to-face into contact with the floor panel, they can be joined by welding such as spot welding, laser welding, or arc welding using carbon dioxide.

[0056] Both longitudinal ends of the floor cross member (60) may contact the side frame member (10) of the battery frame (40) respectively and be joined by welding. However, the arrangement and connection relationship between the floor cross member and the battery frame are not necessarily limited to this.

[0057] In this way, the floor cross member (60) is positioned and fixed on the lower surface of the floor panel (50) so as to extend in the width direction of the vehicle body, i.e., the second direction (Y), so that the floor cross member can perform the role of reinforcing the floor panel (50) and the battery frame (40) in the second direction (Y) within the battery receiving space (S). In other words, the floor cross member (60) can reinforce the rigidity of the vehicle body in response to impact loads applied in the width direction of the vehicle body, i.e., the second direction (Y).

[0058] Floor cross members (60) may be provided in multiple numbers. In this case, the floor cross members may be arranged at predetermined intervals along the first direction (X) with an orientation to extend in the second direction (Y) from the lower surface of the floor panel (50). Here, the spacing between the floor cross members does not necessarily have to be the same. An example in FIG. 2 is shown in which seven floor cross members (60) are applied, but the number is not limited thereto.

[0059] The floor cross member (60) can be made of a metal material such as steel, for example, and can be formed by forming, bending, or roll forming using a press. By manufacturing multiple floor cross members by machining the sheet metal in this way, the convenience of processing can be increased.

[0060] Optionally, the floor cross member (60) may be formed by joining three members. To this end, the floor cross member (60) may include an intermediate member (62) and a pair of end members (63).

[0061] A joint (64) can be formed by welding end members (63) to each end of an intermediate member (62) while they are overlapped. In this embodiment, the end of the intermediate member (62) and the end of the end member (63) are shown overlapping, but this is not limited thereto; they can be butt-joined or overlap-joined, and it is also possible for the floor cross member (60) to be formed as a single member.

[0062] A pair of end members (63) located at both ends in the second direction (Y), which is the longitudinal direction of the floor cross member (60), can be joined by welding to the side frame (10) of the battery frame (40).

[0063] Referring to FIGS. 3 and FIGS. 4, the side frame (10) and floor cross member (60) will be described.

[0064] The side frame (10) includes an outer frame (11), an inner frame (12), and a reinforcing frame (100).

[0065] The outer frame (11) is positioned on the outer side in the width direction (Y) of the vehicle side frame (10). Since the outer frame (11) is formed as a single unit by forming a single steel plate, the mechanical strength of the vehicle side frame (10) can be improved as the outer frame (11), composed of a single steel plate, behaves as a single unit.

[0066] The inner frame (12) is joined to the outer frame (11) in the second direction (Y) and can form a hollow portion (15) with a closed cross-section shape together with the outer frame (11). The inner frame (12) can be positioned on the inner side of the vehicle side frame (10) in the second direction (Y).

[0067] The inner frame (12) and the outer frame (11) can be joined by welding. For example, the inner frame (12) and the outer frame (11) can be joined by spot welding, etc.

[0068] The inner frame (12) can also be manufactured as a single unit by forming a single steel plate. The inner frame (12) can be manufactured by forming a single steel plate over the entire first direction (X). By manufacturing the inner frame (12) as a single unit by forming a single steel plate, the inner frame (12), which is composed of a single steel plate, can move as a single unit, thereby improving the mechanical strength of the vehicle side frame (10).

[0069] The reinforcing frame (100) is connected to the outer frame (11) in the second direction (Y) in the hollow portion (15), and a plurality of them may be spaced apart along the first direction (X) of the outer frame (11). For example, the reinforcing frame (100) and the outer frame (11) may be joined by a welding method. As another example, although not illustrated, the reinforcing frame (100) and the outer frame (11) may be joined by a mechanical fastening method such as bolt fastening instead of a welding method.

[0070] The reinforcing frame (100) is also joined to the inner frame (12) in the hollow portion (150). The connection with the inner frame (12) can be made by a welding method, but it is also possible to make the connection using an adhesive, bond, or resin. The reinforcing frame (100) can be joined to the inner frame (12) in a surface contact manner.

[0071] The reinforcing frame (100) is placed inside a hollow section (15) with a closed cross-section shape and comes into contact with the inner frame (12) and the outer frame (11), thereby minimizing deformation under external load applied during a lateral collision without the need to secure additional space for the installation of the reinforcing frame (100), and the inner frame (12) and the outer frame (11) can operate as one rigid body through the reinforcing frame (100).

[0072] A reinforcing frame (100) is placed in a hollow portion (15), and a plurality of reinforcing frames (100) having corresponding shapes can be arranged spaced apart at regular intervals along a first direction (X).

[0073] In this way, by intermittently installing the reinforcing frame (100) along the first direction (X) of the outer frame (11), the connection portion between the reinforcing frame (100) and the outer frame (11) can be increased, thereby strengthening the connectivity of the cross-section through the connection between the reinforcing frame (100) and the outer frame (11). Accordingly, the effect of minimizing the collapse of the cross-section due to local bending is achieved.

[0074] Although not shown, a structure that deforms and absorbs a second direction impact, such as a seal side, may be placed on the outer side of the side frame (10), and the side frame (10) may be configured to be stronger than the seal side so as not to deform while the seal side is deformed, thereby preventing deformation of the battery receiving space (S).

[0075] In this embodiment, the inner frame (12), the outer frame (11), and the reinforcing frame (100) can each be formed by folding a single steel plate in multiple stages.

[0076] Various joining methods, such as welding joints or adhesive joints, can be applied between components of a vehicle side frame (10), such as the inner frame (12), outer frame (11), and reinforcing frame (100), including spot welding, laser welding, arc welding, plug welding, etc.

[0077] The inner frame (12), outer frame (11), and reinforcing frame (100) may be made of a metal material such as steel, for example. The frame outer panel may be formed by forming using a press, bending, or roll forming.

[0078] As shown in FIGS. 3 and 4, the outer frame (11) includes a side (11a) extending in a third direction (Z) on a cross-section perpendicular to the longitudinal direction, an upper surface (11b) connected to the upper part of the side (11a), and a lower surface (11c) connected to the lower part of the side (11a).

[0079] The inner frame (12) includes a side extending in the third direction (Z) on a cross-section perpendicular to the longitudinal direction and has a flat shape without bending.

[0080] A closed cross-section of the side frame (10) is formed by the side (11a), upper surface (11b), and lower surface (11c) of the outer frame (11) and the side of the inner frame (12). In this embodiment, the cross-section formed by the outer frame (11) and the inner frame (12) is approximately a square cross-section, but is not limited thereto and can, of course, be formed with a cross-section of various shapes.

[0081] The reinforcing frame (100) is connected to all sides of the above-mentioned cross-section and is configured to suppress deformation caused by a force transmitted in the second direction (Y) through the side frame (10).

[0082] The reinforcing frame (100) is welded to the side (11a) and the third direction (Z) which is the vertical direction, and is also joined to the upper surface (11b) and the lower surface (11c), and includes a pair of intersecting side walls (110) spaced apart in the first direction (X) and a connecting side wall (120) that connects the pair of intersecting side walls (110) and is joined to the inner frame.

[0083] The corner of the outer frame (11) at the cross side wall (110) can be formed as an inclined surface (111) so as not to interfere with the upper surface (11b), lower surface (11c) and the curved surface of the side (11b) of the outer frame (11).

[0084] In the present invention, the reinforcing frame (100) has a cross side wall (110) that extends in a cross direction (X) and is joined to the three sides (11a, 11b, 11c) of the outer frame (11), and a connecting side wall (120) that is joined to the side of the inner frame (12).

[0085] Accordingly, the reinforcing frame (100) is connected to all sides of the side frame (10) forming a closed cross-section to help the side frame (10) behave like a single rigid body when subjected to an external force. Therefore, deformation of the side frame (10) is prevented when an impact occurs from the side, and since the side frame (10) is not deformed, damage to the battery pack held in the battery receiving space (S) inside the side frame (10) can be prevented.

[0086] Meanwhile, in this embodiment, the reinforcing frame (100) is positioned along the first direction (X) at a location corresponding to the floor cross member (60). In this case, when an external force is transmitted, the reinforcing frame (100) can form a force transmission path to the floor cross member (60) to suppress deformation.

[0087] However, the first direction (X) position of the reinforcing frame (100) is not limited to a position corresponding to the floor cross member (60). Considering the weight of the frame, the number of reinforcing frames (100) may be limited, and if the reinforcing frame (100) is placed at a position corresponding to the floor cross member (60) and receives an impact between the floor cross members (60), then both the floor cross member (60) and the reinforcing frame (100) may be absent, causing deformation of the side frame (10) and resulting damage to the battery inside the battery receiving space (S). Therefore, it is also possible to place the reinforcing frame (100) in the first direction (X) between the floor cross members (60), preferably at an intermediate position between the floor cross members (60).

[0088] Meanwhile, the reinforcing frame (100) is not only placed inside the side frame (10), but can also be placed in the front frame (20) and the rear frame (30).

[0089] FIG. 5 shows a perspective view of the vehicle side frame components in a disassembled state on the vehicle floor of FIG. 1, and FIG. 6 shows a perspective view of the vehicle side frame components in a partially assembled state on the vehicle floor of FIG. 1. FIG. 5 and FIG. 6 show the process of manufacturing the side frame (10).

[0090] As shown in FIG. 5, the side frame (10) is manufactured with an inner frame (12), an outer frame (11), and a reinforcing frame (100) separately. The inner frame (12), the outer frame (11), and the reinforcing frame (100) can all be formed from steel and can be formed from the same material, but are not limited thereto.

[0091] As shown in FIGS. 5 and 6, the reinforcing frame (100) is first attached to the outer frame (11). The reinforcing frame (100) is attached to the inner three sides of the outer frame (11) through welding. The reinforcing frame (100) is also attached to the upper surface (11b) and lower surface (11c) to prevent deformation in the vertical direction due to a force in the second direction (Y).

[0092] The inner frame (12) is attached to an assembly in which a reinforcing frame (100) is attached to an outer frame (11). The inner frame (12) and the outer frame (11) are joined by welding, and the connecting side wall (120) of the reinforcing frame (100) can be attached to the inner frame (12) by an adhesive.

[0093] Alternatively, it is possible to form a through hole in the inner frame (12) at a position corresponding to the reinforcing frame (100) and to weld the inner frame (12) and the reinforcing frame (100) together through the through hole using a plug welding method, and other joining methods may also be applied. When such a plug welding method is applied, a through hole is formed in the inner frame (12) that is joined to the reinforcing frame (100), and welding material can be filled into this through hole.

[0094] FIGS. 7 and 8 illustrate another embodiment in which the outer frame and reinforcing frame of the vehicle side frame of the present invention are combined.

[0095] As shown in FIG. 7, the reinforcing frame (100) has a 'C'-shaped cross section in the third direction (Z), including a pair of intersecting side walls (110) and a connecting side wall (120) connecting the intersecting side walls, just like in the previous embodiment. In this embodiment, the connecting side wall (120) may include an inwardly curved portion (130) that is inwardly curved toward the side (11a) of the outer frame (11).

[0096] In this embodiment, the inner frame (12) is connected to the connecting side wall (120) in a portion other than the inwardly curved portion (130), and the inwardly curved portion (130) is not connected to the inner frame (12). By including such an inwardly curved portion (130), the rigidity of the reinforcing frame (100) can be improved.

[0097] In the embodiment of FIG. 8, the reinforcing frame (100) is identical to the previous embodiment in that it has a 'C'-shaped cross section in the third direction (Z) by including a pair of intersecting side walls (110) and a connecting side wall (120) connecting the intersecting side walls. In this embodiment, a reinforcing flange (140) is further formed at the edge of the intersecting side wall (110), and accordingly, the cross-sectional shape of the reinforcing frame (100) in the third direction (Z) can have a hat shape.

[0098] The reinforcing flange (140) can improve the connection with the outer frame (100) of the outer frame (11) by securing a sufficient connection area with the side (11a) of the outer frame (11).

[0099] FIG. 9 shows a perspective view of a vehicle floor according to another embodiment of the present invention, and FIG. 10 shows a partial cross-sectional view of the vehicle floor of FIG. 9.

[0100] As illustrated in FIGS. 9 and 10, the floor of the vehicle (1) includes a battery frame (40), a floor panel (50), a sill side (70) positioned on the outside of the battery frame (40), and a battery pack (90).

[0101] The structure of the battery frame (40) and the structure of the floor panel (50) are not different from the embodiment of FIG. 1, so a detailed description will be omitted.

[0102] The seal side (70) is connected to the side frame (10) of the battery frame (40) in the second direction (Y) outside and includes a reinforcing member (80) inside. In this embodiment, the seal side (70) is partially open, but is not limited thereto and may have a closed cross-section and have a reinforcing member (80) placed inside.

[0103] The reinforcing member (80) includes first and second reinforcing members (81, 82), and the sill side (70) absorbs lateral impact by deforming when an impact occurs from the side, including the reinforcing member (80). The reinforcing member (80) can be welded to the sill side (70), and the sill side (70) can be welded to the side frame (10) of the battery frame (40).

[0104] The battery pack (90) is mostly located in the battery receiving space (S; see FIG. 2) and can be fixed to the battery frame (40) via a mounting part (91) to which bolting or the like can be applied.

[0105] In this embodiment, the floor (1) of the vehicle has a sill side (70) connected to the battery frame (40), so that the sill side (70) deforms and absorbs the impact during a side collision, and the battery frame (40) is connected to the inner and outer frames (11, 12) through the reinforcing frame (100), so that the deformation of the battery frame (40) can be prevented while the sill side (70) is deformed, and damage to the battery pack (90) can be prevented.

[0106] In this embodiment, the seal side (70) is configured to include a reinforcing member (80), but the shape of the reinforcing member (80) or the shape of the seal side (70) can be varied.

[0107] The above description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention.

[0108] (Explanation of symbols)

[0109] 1: Floor 10: Side frame

[0110] 11: Outer frame 12: Inner frame

[0111] 20: Front frame 30: Rear frame

[0112] 40: Battery frame 50: Floor panel

[0113] 70: Sil-side 80: Reinforcing member

[0114] 100: Reinforcement frame 110: Intersecting side wall

[0115] 120: Connecting sidewall

Claims

1. An outer frame positioned on the outer side in the width direction; An inner frame coupled to the outer frame and forming a hollow portion with a closed cross-section shape together with the outer frame; and It includes reinforcing frames that are coupled to the outer frame in the hollow portion and spaced apart and arranged along the extension direction of the outer frame. The above reinforcing frame includes a cross side wall that intersects the extension direction of the above outer frame, and is a vehicle side frame coupled to the side of the outer frame and the side of the inner frame.

2. In Paragraph 1, The above reinforcing frame is a vehicle side frame that is also coupled to the upper and lower surfaces of the above closed cross-section.

3. In Paragraph 2, The above closed cross-section is a square cross-section, and The above reinforcing frame is a vehicle side frame that contacts all four sides of the above square cross-section.

4. In Paragraph 2, The above outer frame includes an upper surface, a lower surface, and a side connecting the upper surface and the lower surface, and The above reinforcing frame is a vehicle side frame that contacts the upper surface, lower surface and side.

5. In Paragraph 4, The above reinforcing frame is A pair of the aforementioned intersecting side walls welded to the aforementioned side, bottom surface and top surface and spaced apart in the longitudinal direction; and A vehicle side frame comprising a connecting side wall connecting a pair of intersecting side walls.

6. In Paragraph 5, The above reinforcing frame is, A vehicle side frame further comprising: a reinforcing flange formed extending in an extended direction along the side at the portion where the above-mentioned cross-side wall is joined to the side.

7. In Paragraph 5, The above reinforcing frame is, A vehicle side frame further comprising: an inwardly curved portion disposed on the connecting side wall and inserted toward the side of the outer frame from the connecting side wall.

8. In Paragraph 5, A vehicle side frame in which the above-mentioned cross side wall is combined with the above-mentioned outer frame, and the above-mentioned connecting side wall is combined with the above-mentioned inner frame.

9. In Paragraph 8, A vehicle side frame in which the above-mentioned cross side wall is welded to the above-mentioned outer frame, and the above-mentioned connecting side wall is bonded to the above-mentioned inner frame.

10. In Paragraph 8, A vehicle side frame wherein the above-mentioned cross side wall is welded to the above-mentioned outer frame, the above-mentioned connecting side wall is welded to the above-mentioned inner frame, and the above-mentioned inner frame includes a through hole formed on the side of the inner frame for welding with the above-mentioned connecting side wall.

11. A battery frame having a battery receiving space formed inside; A floor panel coupled to the battery frame and disposed on the battery receiving space; A plurality of floor cross members extending in the width direction of the vehicle body and coupled to the lower surface of the floor panel; and A vehicle floor comprising a pair of sill sides coupled to both sides of the battery frame, The above battery frame is a floor of a vehicle that is a roof frame including a vehicle side frame according to any one of claims 1 to 10.

12. In Paragraph 11, In the longitudinal direction of the above vehicle body, the reinforcing frame is positioned at a location corresponding to the floor cross member, in the floor of the vehicle.

13. In Paragraph 11, In the longitudinal direction of the above vehicle body, the reinforcing frame is positioned at an intermediate location between the floor cross members of the vehicle floor.

14. In Paragraph 11, The above-mentioned loop frame includes a front frame connected to the front in the extension direction of the side frame and a rear frame connected to the rear, and A floor of a vehicle in which the reinforcing frame is also positioned inside the front frame and rear frame.

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