Floor structure

Abstract

A floor structure is disclosed. A floor structure according to one embodiment of the present invention comprises a floor frame including a pair of side sills arranged to face each other in the vehicle width direction and each formed in the vehicle body length direction, a pair of first frames each mounted along the pair of side sills between the pair of side sills, and at least one second frame mounted in the vehicle width direction between the pair of first frames, and at least one core structural member each mounted in the space formed by the floor frame and formed of a shock-absorbing material.

Description

Technology Field

[0001] The present invention relates to a floor structure, and more specifically, to a floor structure capable of improving marketability, such as securing impact rigidity and improving interior aesthetics. Background Technology

[0002] Recently, in order to expand interior space, there has been an increasing use of hidden rails in automotive floor structures, which conceal the seat rails beneath the floor panel.

[0003] In addition, there is an increasing need for flat floors that lack the tunnel structure of floor panels applied to conventional internal combustion engine vehicles.

[0004] In addition, various technologies are applied to the vehicle's floor structure to ensure passenger safety in the event of a collision.

[0005] Meanwhile, in order to reduce weight for improved fuel efficiency, automobile floor structures are attempting to increase the strength of the frame material while simultaneously reducing its thickness.

[0006] However, if the thickness of the frame material is reduced, a problem arises in which the bending stiffness of the frame decreases.

[0007] Therefore, as mentioned above, research and development are required for floor structures that ensure both lightweighting and bending rigidity, while also providing collision stability and suitability for the intended purpose.

[0008] The matters described in this background technology section are written to enhance understanding of the background of the invention and may include matters that are not prior art already known to those skilled in the art to which this technology belongs. The problem to be solved

[0009] An embodiment of the present invention aims to provide a hidden floor structure comprising a floor frame made of aluminum extrusion as a skeleton, a core structural member positioned therebetween, and a sheet long rail inserted between the core structural members.

[0010] In addition, an embodiment of the present invention aims to provide a floor structure that is formed with a hidden structure to improve indoor aesthetics and simultaneously secure bending rigidity and side impact performance. means of solving the problem

[0011] In one or more embodiments of the present invention, a floor structure may be provided comprising: a pair of side sills arranged to face each other in the width direction of the vehicle and each formed in the length direction of the vehicle body; a pair of first frames each mounted along the pair of side sills between the pair of side sills; at least one second frame mounted in the width direction between the pair of first frames; and at least one core structural member each mounted in the space formed by the floor frame and formed of a shock-absorbing material.

[0012] In addition, the upper and lower ends of the outer frame and inner frame, which are made of steel, are joined to form an internal space, and a side sill reinforcement made of aluminum extrusion can be inserted into one or more of the internal spaces of the pair of side sills.

[0013] Additionally, each of the above pair of first frames may include a main frame having a plurality of partitions formed therein, which is positioned lengthwise along each side sill and contacted on the inner surface of each side sill facing the opposite side sill; an upper overlap section formed integrally on the upper side of the main frame and folded from the main frame to overlap a certain amount on the upper surface of each side sill; a lower overlap section formed integrally on the lower side of the main frame and contacted on each inner surface of each side sill; a subframe formed integrally on the side of the main frame; and a connecting section formed integrally on the lower corner of the subframe.

[0014] In addition, the main frame may be formed with a cross-sectional area that gradually decreases from each side sill toward the opposite side sill.

[0015] In addition, each of the above pair of first frames may be made of aluminum extrusion.

[0016] Additionally, the at least one second frame may include a front second frame positioned at the front with respect to the vehicle body length direction, a rear second frame positioned at the rear, and at least one middle second frame between the front second frame and the rear second frame.

[0017] In addition, the front second frame has a lower surface that is inclined upward toward the front, and together with the inclined surface, can be connected to a front structure by a front flange extending from the inclined surface.

[0018] In addition, the rear second frame is formed with at least one closed section and can be connected to a rear structure by a rear flange extending from a rear corner.

[0019] In addition, each of the plurality of middle second frames is formed with at least one closed cross-section and can be connected to the one or more core structural members by middle flanges extending from each corner of the lower side.

[0020] In addition, each of the above at least one second frame may be made of aluminum extrusion.

[0021] Additionally, the at least one core structural member may include a core member disposed in the space formed by the floor frame, a lower surface member made of aluminum material and joined to the lower part of the core member by an adhesive, an upper surface member made of aluminum material and joined to the upper part of the core member by an adhesive, and core reinforcing members made of aluminum extrusions mounted on both sides along the vehicle body length direction on a core member located in the center with respect to the vehicle body length direction.

[0022] In addition, the core material may be made of a foam made of any one of PET (Poly-Ethylene Terephthalate), PVC (Poly-Vinyl Chloride), or PMI (Poly-Methacrylimide).

[0023] In addition, a plurality of slots are formed along the longitudinal direction of the vehicle body in cross-section on the upper surface material, and a seat long rail can be mounted in each of the slots.

[0024] In addition, the above-mentioned sheet long rail has an opening formed along the longitudinal direction of the upper surface, and its lower surface protrudes or protrudes to contact the lower surface material, and can be fastened to the core reinforcing material or the first frame by means of mounting parts integrally formed protrudingly on both sides.

[0025] In addition, the above-mentioned sheet long rail may be made of aluminum extrusion. Effects of the invention

[0026] A floor structure according to an embodiment of the present invention is formed with a hidden structure in which a floor frame made of aluminum extrusion is used as a skeleton, core structural members are placed between them, and a seat long rail is inserted between the core structural members, thereby improving the interior aesthetics while simultaneously ensuring bending rigidity and side impact performance.

[0027] In addition, the floor structure according to an embodiment of the present invention can lower the height of the floor structure by means of a hidden structure in which the seat long rail is inserted into the core structure, and accordingly, the center of gravity of the vehicle can be lowered.

[0028] Furthermore, other effects that can be obtained or predicted by the embodiments of the present invention will be disclosed directly or implicitly in the detailed description of the embodiments of the present invention. That is, various effects predicted according to the embodiments of the present invention will be disclosed within the detailed description to be set forth below. Brief explanation of the drawing

[0029] FIG. 1 is a configuration diagram in which a floor structure according to an embodiment of the present invention is applied. FIG. 2 is an exploded view showing a floor structure according to an embodiment of the present invention. Figure 3 is a cross-sectional view along line AA of Figure 1. Figure 4 is a cross-sectional view along line BB of Figure 1. FIG. 5 is a configuration diagram showing a core structural material applied to a floor structure according to an embodiment of the present invention. FIG. 6 is a test diagram showing the collision of a floor structure according to an embodiment of the present invention. Specific details for implementing the invention

[0030] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0031] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0032] The size and thickness of each component shown in the drawings are depicted arbitrarily for the convenience of explanation, and thus the present invention is not necessarily limited to what is shown in the drawings; furthermore, the thickness has been enlarged to clearly represent various parts and regions.

[0033] Furthermore, in the detailed description below, the designation of components as "1st," "2nd," etc., is intended to distinguish them due to their identical nature, and is not strictly limited to that order in the description below.

[0034] FIG. 1 is a configuration diagram showing a floor structure applied according to an embodiment of the present invention, FIG. 2 is an exploded view showing a floor structure according to an embodiment of the present invention, FIG. 3 is a cross-sectional view along line AA of FIG. 1, FIG. 4 is a cross-sectional view along line BB of FIG. 1, and FIG. 5 is a configuration diagram showing a core structural material applied to a floor structure according to an embodiment of the present invention.

[0035] The floor structure according to an embodiment of the present invention can be applied to various types of mobility.

[0036] For example, the floor structure according to an embodiment of the present invention can be applied to various services or means of transportation that contribute to convenient movement, such as automobiles, urban air mobility (UAM), and air vehicles.

[0037] In the embodiments of the present invention, a floor structure applied to an automobile is described as an example.

[0038] Referring to FIG. 1, a floor structure (1) according to an embodiment of the present invention can be configured on the upper part of a battery case (3) for an electric vehicle.

[0039] The floor structure (1) protects the battery pack housed in the battery case (3) and simultaneously forms the lower part of the vehicle.

[0040] Referring to FIGS. 2 to 4, a floor structure (1) according to an embodiment of the present invention includes a pair of side sills (10), a floor frame (20), and a core structural member (30).

[0041] In this specification, 'body length direction' may be defined as the front-rear direction of the vehicle, 'body width direction' may be defined as the left-right direction of the vehicle, and 'vehicle height direction' may be defined as the height direction of the vehicle.

[0042] Additionally, in this specification, the 'inner surface' of a component refers to a surface facing each other between two components that are spaced apart from each other.

[0043] Furthermore, in this specification, the 'upper part', 'upper', 'upper', or 'upper surface' of a component indicates an end, part, end, or surface of a component located relatively higher in the drawing, and the 'lower part', 'lower', 'lower', or 'lower surface' of a component indicates an end, part, end, or surface of a component located relatively lower in the drawing.

[0044] The above pair of side sills (10) are arranged to face each other in the vehicle width direction.

[0045] The above pair of side sills (10) are each configured symmetrically on both sides with respect to the center of the vehicle width direction, and each is formed in the vehicle body length direction.

[0046] The above pair of side seals (10) are made of steel.

[0047] The above pair of side seals (10) have their upper and lower ends of the outer frame (11) and the inner frame (13) joined together to form an internal space (SP).

[0048] In addition, a side sill reinforcement (15) is inserted into the internal space of one or more of the pair of side sills (10).

[0049] The above side sill reinforcement (15) is arranged lengthwise along the length of the vehicle body.

[0050] The above side seal reinforcement (15) is made of aluminum extrusion and has at least one partition wall (150) formed inside it.

[0051] A floor frame (20) is formed between the above pair of side sills (10).

[0052] In an embodiment of the present invention, the floor frame (20) comprises a pair of first frames (21) each mounted along a pair of side sills (10), and at least one second frame (23) mounted in the vehicle width direction between the pair of first frames (21).

[0053] Each of the above pair of first frames (21) includes a main frame (210), an upper overlap section (213), a lower overlap section (215), a subframe (217), and a connecting section (219).

[0054] The above main frame (210) may be made of aluminum extrusion.

[0055] The main frame (210) is positioned along each side sill (10) and contacted on the inner side of each side sill (10) facing the opposite side sill (10).

[0056] These main frames (210) are formed such that the cross-sectional area gradually decreases from each side sill (10) toward the opposite side sill (10).

[0057] In addition, at least one partition wall (211) is configured inside the main frame (210).

[0058] The upper overlap section (213) is integrally formed on the upper side of the main frame (210).

[0059] The upper overlap section (213) is folded from the main frame (210) and overlaps a certain amount on the upper surface of each side seal (10).

[0060] The lower overlap section (215) is integrally formed on the lower side of the main frame (210).

[0061] The lower overlap section (215) can be in contact with each inner surface (100) of each side seal (10) to improve the contact area.

[0062] The above subframe (217) is integrally formed on the side of the above mainframe (210).

[0063] These subframes (217) are made of square cross-sections, and a closed cross-section can be formed inside.

[0064] Additionally, the connecting member (219) is integrally formed at the lower corner of the subframe (217).

[0065] The above connecting member (219) can be connected to the core structural material (30).

[0066] Each of the above-mentioned pair of first frames (21) can be made of aluminum extrusion.

[0067] And at least one second frame (23) includes a front second frame (230) positioned at the front with respect to the vehicle body length direction, a rear second frame (233) positioned at the rear, and at least one middle second frame (231) positioned between the front second frame (230) and the rear second frame (233).

[0068] The above-mentioned front second frame (230) is formed with a lower surface that is inclined upward toward the front (230b).

[0069] The above-mentioned front second frame (230) is connected to the front structure (50) by the front flange (230a) extending from the inclined surface (230b) together with the inclined surface (230b).

[0070] At this time, the above-mentioned front structure (50) may be a dash panel.

[0071] The above rear second frame (233) is made of at least one closed section.

[0072] The above rear second frame (233) is connected to the rear structure (60) by a rear flange (233a) extending from the rear corner.

[0073] At this time, the rear structure (60) may be a rear panel.

[0074] And each of the above at least one middle second frame (231) is made of at least one closed section.

[0075] Each of the above at least one middle second frame (231) is connected to the above at least one core structural member (30) by a middle flange (231a) extending from each lower corner.

[0076] Although it has been described as an example in which at least one middle second frame (231) is configured between the front second frame (230) and the rear second frame (233), it is not necessarily limited to this, and the number can be changed as needed.

[0077] Each of the above at least one second frame (23) may be made of aluminum extrusion.

[0078] In an embodiment of the present invention, the at least one core structural member (30) is disposed in the space formed by the floor frame (20).

[0079] That is, the core structural material (30) is formed in the space between the floor frames (20).

[0080] The above at least one core structural member (30) includes a core member (31), a lower surface member (33), an upper surface member (35), and a core reinforcing member (37) (see FIG. 5).

[0081] The core material (31) is placed in the space formed by the floor frame (20).

[0082] For example, the core material (31) may be placed in the empty space partitioned by the pair of first frames (21) and at least one second frame (23).

[0083] The above core material (31) can be disposed between the front second frame (230) and the middle second frame (231) positioned in the front among the at least one middle second frame (231), between the rear second frame (233) and the middle second frame (231) positioned in the rear among the at least one middle second frame (231), and between the at least one middle second frame (231).

[0084] This core material (31) may be made of a foam made of any one of PET (Poly-Ethylene Terephthalate), PVC (Poly-Vinyl Chloride), or PMI (Poly-Methacrylimide).

[0085] The lower surface material (33) above may be made of aluminum.

[0086] The lower surface material (33) can be joined to the lower part of the core material (31) by an adhesive.

[0087] The number of these lower surface materials (33) can be determined in correspondence with the core material (31).

[0088] That is, the lower surface material (33) can be positioned in the same way as the core material (31) between the front second frame (230) and the middle second frame (231) positioned in the front, between the rear second frame (233) and the middle second frame (231) positioned in the rear, and between the at least one middle second frame (231).

[0089] The upper surface material (35) above may be made of aluminum.

[0090] The upper surface material (35) is bonded to the upper part of the core material (31) by an adhesive (39).

[0091] This upper surface material (35) can be configured to cover the core material (31), the sub-frame (217) of the first frame (21), and the second frame (23).

[0092] In addition, a plurality of slots (350) are formed along the cross-sectional length direction of the vehicle body in the upper surface material (35).

[0093] A seat long rail (40) is installed in each of the above slots (350).

[0094] The above sheet long rail (40) may be made of aluminum extrusion.

[0095] The above sheet long rail (40) has an opening (41) formed along the length direction of the upper surface.

[0096] The lower surface of such a sheet long rail (40) protrudes or protrudes and contacts the lower surface material (33).

[0097] The above-mentioned seat long rail (40) can be fastened to the core reinforcing member (37) or the first frame (21) by means of mounting portions (43) integrally formed protruding from both sides.

[0098] The above mounting portion (43) can be formed at the front and rear respectively along the length direction of the seat long rail (40).

[0099] FIG. 6 is a test diagram showing the collision of a floor structure (1) according to an embodiment of the present invention.

[0100] Referring to FIG. 6, in the case of a side collision, the impact force of the floor structure (1) according to an embodiment of the present invention is transmitted to the core structure (30) through the side sill (10) and the floor frame (20), and the impact force can be absorbed by the core structure (30).

[0101] At this time, the above-mentioned sheet long rail (40) serves to transmit the load.

[0102] In addition, the side seal (10) and the floor frame (20) serve to absorb impact force and can prevent the battery case (3) placed at the bottom of the floor structure (1) from breaking.

[0103] That is, the load is concentrated on the first frame (21) of the side seal (10) and the floor frame (20), and the first frame (21) is deformed within the elastic region due to the structure of the first frame (21), thereby preventing the battery case (3) and the core structural material (30) from breaking.

[0104] A floor structure (1) according to an embodiment of the present invention is structured such that a floor frame (20) made of aluminum extrusion material is used as a skeleton, a core structural member (30) is placed between them, and a sheet long rail (40) is inserted between the core structural members (30).

[0105] Accordingly, the floor structure (1) according to the embodiment of the present invention is formed with a hidden structure as described above, thereby improving the interior aesthetics while ensuring bending rigidity and side impact performance.

[0106] In addition, the floor structure (1) according to an embodiment of the present invention can lower the height of the floor structure (1) by means of a hidden structure in which the seat long rail (40) is inserted into the core structure (30), and the center of gravity of the vehicle can be lowered.

[0107] Accordingly, the floor structure (1) can improve the passenger's ability to ascend and descend.

[0108] Although the present invention has been described above with reference to preferred embodiments, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as described in the following claims. Explanation of the symbols

[0109] 1: Floor structure 3: Battery case 10: Side sill 100: Inner side of the side sill 11: Outer frame 13: Inner frame 15: Side sill reinforcement 150: Bulkhead of side sill reinforcement 20: Floor frame 21: First frame 210: Main frame 211: Main frame bulkhead 213: Upper overlap section 215: Lower overlap section 217: Subframe 219: Connecting section 23: Frame 2 230: Front Frame 2 230a: Front flange 230b: Inclined surface 231: Middle 2nd Frame 231a: Middle Flange 233: Rear 2nd Frame 233a: Rear Flange 30: Core structural material 31: Core material 33: Lower surface material 35: Upper surface material 350: Slot 37: Core reinforcement 39: Adhesive 40: Sheet long rail 41: Opening 43: Mounting part 50: Front structure 60: Rear structure

Claims

Claim 1 A pair of side sills arranged to face each other in the width direction, each formed in the length direction of the vehicle body; a floor frame comprising a pair of first frames each mounted along the pair of side sills between the pair of side sills, and at least one second frame mounted in the width direction between the pair of first frames; A floor structure comprising: at least one core structural member formed of a shock-absorbing material, each mounted in the space formed by the floor frame; wherein each of the pair of first frames comprises a main frame that is longitudinally arranged along each side sill and contacted on the inner surface of each side sill facing the opposite side sill, and has at least one bulkhead formed inside; an upper overlap section formed integrally on the upper side of the main frame and folded from the main frame to overlap a certain amount on the upper surface of each side sill; a lower overlap section formed integrally on the lower side of the main frame and contacting each inner surface of each side sill; a subframe formed integrally on the side of the main frame; and a connecting section formed integrally on the lower corner of the subframe. Claim 2 A floor structure according to claim 1, wherein the upper and lower ends of an outer frame and an inner frame made of steel are joined to form an internal space, and a side sill reinforcement made of aluminum extrusion is inserted into one or more of the internal spaces of the pair of side sills. Claim 3 delete Claim 4 In claim 1, the main frame is a floor structure in which the cross-sectional area is formed to gradually decrease from each side sill toward the opposite side sill. Claim 5 In claim 1, each of the pair of first frames is a floor structure made of aluminum extrusion. Claim 6 In claim 1, the floor structure comprises at least one second frame including a front second frame positioned at the front with respect to the vehicle body length direction, a rear second frame positioned at the rear, and at least one middle second frame positioned between the front second frame and the rear second frame. Claim 7 In claim 6, the front second frame is formed with a lower surface that is inclined upward toward the front, and together with the inclined surface, a floor structure connected to a front structure by a front flange extending from the inclined surface. Claim 8 In claim 6, the rear second frame is formed of at least one closed section and is a floor structure connected to a rear structure by a rear flange extending from a rear corner. Claim 9 In claim 6, each of the at least one middle second frame is formed with at least one closed cross-section and is connected to the at least one core structural member by a middle flange extending from each lower corner. Claim 10 In claim 1, each of the at least one second frame is a floor structure made of aluminum extrusion. Claim 11 A floor structure comprising: a pair of side sills arranged to face each other in the width direction of the vehicle, each formed in the length direction of the vehicle body; a pair of first frames each mounted along the pair of side sills between the pair of side sills, and at least one second frame mounted in the width direction between the pair of first frames; and at least one core structural member each mounted in the space formed by the floor frame and formed of a shock-absorbing material; wherein the at least one core structural member comprises a core member disposed in the space formed by the floor frame, a lower surface member made of aluminum material and joined to the lower part of the core member by an adhesive, an upper surface member made of aluminum material and joined to the upper part of the core member by an adhesive, and a core reinforcing member made of an aluminum extrusion material mounted on both sides along the length direction of the vehicle body to the core member located in the center with respect to the length direction of the vehicle body. Claim 12 In claim 11, the core material is a floor structure made of a foam made of any one of PET (Poly-Ethylene Terephthalate), PVC (Poly-Vinyl Chloride), or PMI (Poly-Methacrylimide). Claim 13 A floor structure according to claim 11, wherein a plurality of slots are formed along the longitudinal direction of the vehicle body in cross-section of the upper surface material, and a seat long rail is mounted in each of the slots. Claim 14 In paragraph 13, the above-mentioned sheet long rail has an opening formed along the longitudinal direction of the upper surface, its lower surface protrudes or protrudes and contacts the lower surface material, and is a floor structure fastened to the core reinforcing material or the first frame by means of mounting parts integrally formed protrudingly on both sides. Claim 15 In Clause 13, the above-mentioned sheet long rail is a floor structure made of aluminum extrusion.

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