Vehicle under structure

Abstract

The utility model relates to a lower portion structure of a vehicle. An intermediate member, at least a portion of which is disposed between the pair of vehicle body frame members; a power storage device disposed below the intermediate member; a seat disposed above the intermediate member; and a reinforcement member disposed inside the intermediate member or on the upper surface of the intermediate member. A region in which the reinforcing member is not provided is provided below the seat in the vertical direction of the vehicle.

Description

Technical Field

[0001] This disclosure relates to the lower structure of a vehicle. Background Technology

[0002] As disclosed in Japanese Patent Application Publication No. 2020-142589, efforts were made to ensure the rigidity of the vehicle's substructure and to minimize the increase in the weight of the vehicle's substructure. Utility Model Content

[0003] The purpose of this disclosure is to provide a vehicle substructure that can ensure the rigidity of the vehicle substructure and suppress the increase in weight of the vehicle substructure.

[0004] The vehicle lower structure disclosed herein is characterized by having a pair of body frame members, a first intermediate member at least partly disposed between the pair of body frame members, an energy storage device disposed below the first intermediate member, a first seat disposed above the first intermediate member, and a first reinforcing member disposed inside the first intermediate member or on the upper surface of the first intermediate member, wherein there is a region in the vertical direction of the vehicle below the first seat where the first reinforcing member is not disposed.

[0005] According to the above configuration, even if the rigidity of the first intermediate member alone is insufficient to bear the load, the presence of the first reinforcing member enables the occupant's load to be borne through the cooperation of the first intermediate member and the first reinforcing member. The presence of the first reinforcing member ensures rigidity, and the presence of an area below the first seat in the vertical direction of the vehicle where the first reinforcing member is not provided suppresses the increase in weight as the lower structure of the vehicle.

[0006] In the above disclosure, the lower frame may include a pair of side members, a front member connecting the front portions of the pair of side members to each other, a rear member connecting the rear portions of the pair of side members to each other, and a cross member connecting the middle portions of the pair of side members in the vehicle longitudinal direction. The pair of body frame members are any two beams (members) selected from the pair of side members, the front member, and the cross member. The first intermediate member is arranged to fill the space formed inside the pair of side members, the front member, and the cross member. The first reinforcing member has a first support area, defining a first right reference line and a first left reference line extending in the vehicle longitudinal direction along the right and left ends of the first seat in the vehicle width direction. Moreover, when the first support area is projected toward the upper side in the vertical direction, the first projected image formed by the projection is located in front of the front end of the first seat and between the first right reference line and the first left reference line.

[0007] According to the above configuration, the first intermediate member can be arranged without gaps in the space formed inside the multiple beams, which are a pair of longitudinal beams, a front beam, a cross beam, and a rear beam.

[0008] In the above disclosure, the first reinforcing member may be provided in such a way that it extends from the front beam toward the rear side in the vehicle's longitudinal direction.

[0009] According to the above configuration, by joining the first reinforcing member to the front beam, the first reinforcing member is able to withstand a greater load.

[0010] In the above disclosure, the lower frame may include a plurality of the aforementioned crossbeams, and the vehicle lower structure may also include a second intermediate member arranged to fill the space formed inside the pair of longitudinal beams and the plurality of the aforementioned crossbeams. The energy storage device may be disposed below both the first intermediate member and the second intermediate member. The vehicle lower structure may also include a second seat and a second reinforcing member disposed inside the second intermediate member or on the upper surface of the second intermediate member. The second reinforcing member has a second support area, defining a second right reference line and a second left reference line extending in the vehicle longitudinal direction along the right and left ends of the second seat in the vehicle width direction, respectively. Furthermore, when the second support area is projected toward the upper side in the vertical direction, the second projection image formed by the projection is located in front of the front end of the second seat and between the second right reference line and the second left reference line.

[0011] According to the above configuration, even if the rigidity of the second intermediate member alone is insufficient to bear the load, the presence of the second reinforcing member allows the occupant's load to be borne through the cooperation of the second intermediate member and the second reinforcing member. The presence of the second reinforcing member ensures rigidity and suppresses the increase in weight as the vehicle's lower structure.

[0012] In the above configuration, the second reinforcing member may be provided in such a way that it extends from any of the aforementioned crossbeams toward the front or rear side in the vehicle's longitudinal direction.

[0013] According to the above configuration, by joining the second reinforcing member to the crossbeam, the second reinforcing member is able to withstand a greater load.

[0014] In the above configuration, the energy storage device may include: an energy storage module having a plurality of energy storage units arranged in a horizontal direction; a housing having a top plate and a bottom plate and housing the energy storage module; and a rigid plate disposed between the top plate and the energy storage module, wherein when the first reinforcing member is projected toward the lower side in the vertical direction, at least a portion of the third projection image formed by the projection is located at a position that does not overlap with the rigid plate.

[0015] According to the above configuration, the third projection image of the first reinforcing member is located at a position that does not overlap with the rigid plate, which means that there is no rigid plate at that position. Even if there is a part where the rigid plate is not present as described above, the rigidity can be ensured by the presence of the first reinforcing member. Correspondingly, the vehicle lower structure can be manufactured at a lower cost by omitting the presence of the rigid plate.

[0016] In the above configuration, the energy storage device may further include a buffer member disposed between the top plate and the energy storage module, and at least a portion of the third projected image is located at a position overlapping with the buffer member.

[0017] Based on the above configuration, even if there are parts where the rigid plate is not present as described above, a buffer member is present in a way that fills in those parts. For example, the buffer member can be made of a component that is cheaper than the rigid plate and adhesive, and in this case, the vehicle substructure can be manufactured at a lower cost.

[0018] In the above configuration, the rigid plate may have an overlapping portion that overlaps with the third projected image, the overlapping portion of the rigid plate may not be engaged with the top plate, and at least a portion of the rigid plate other than the overlapping portion may be engaged with the top plate.

[0019] According to the above configuration, since there is no adhesive between the overlapping portion of the rigid plate and the top plate, the vehicle lower structure can be manufactured at a lower cost. Furthermore, in the unbonded area of ​​the overlapping portion, a space is formed due to the absence of adhesive. When a load is input from the upper surface of the floor, the floor deforms, the intermediate components also deform, and then the top plate deforms. By absorbing (mitigating) the displacement accompanying this deformation through the aforementioned space, the load input to the rigid plate can be reduced.

[0020] In the above disclosure, the rigid plate may have an overlapping portion that overlaps with the third projected image, the overlapping portion of the rigid plate is engaged with the top plate, and at least a portion of the rigid plate other than the overlapping portion is not engaged with the top plate.

[0021] In the aforementioned configuration, the absence of adhesive allows for the manufacture of the vehicle's lower structure at a lower cost. Furthermore, since the overlapping portion is easily located under the occupant's feet, the rigid plate can be reinforced by joining the overlapping portion to the roof plate. On the other hand, under the seat, the portion of the rigid plate that does not overlap with the third projected image (the non-overlapping portion) is difficult to directly absorb loads caused by the occupant's footsteps. Therefore, by not joining the rigid plate to the roof plate at this non-overlapping portion, a space is created at that location, which can be used to absorb deviations in the vertical position of the crossbeams and the energy storage device, as well as displacement caused by relative vibrations.

[0022] The above and other objects, features, aspects and advantages of this invention will become apparent from the following detailed description of the invention, which is understood in conjunction with the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a side view showing a vehicle 1 having the vehicle lower structure 10 of embodiment 1.

[0024] Figure 2 This is a plan view showing the vehicle compartment 13 and the vehicle lower structure 10 of the vehicle 1 in Embodiment 1.

[0025] Figure 3 This is a cross-sectional view of the vehicle lower structure 10 in Embodiment 1, viewed from the front side of vehicle 1, along with... Figure 4 The sectional view along line III-III is equivalent to that shown in the view.

[0026] Figure 4 This is a cross-sectional view showing the lower structure 10 of the vehicle in Embodiment 1 as viewed from the left side of the vehicle 1, along with... Figure 3 The sectional view along line IV-IV is equivalent to that shown in the view.

[0027] Figure 5 It is Figure 4 A portion of the image is shown in magnification.

[0028] Figure 6 and Figure 4 The corresponding view is a cross-sectional view showing the vehicle lower structure 10 in Embodiment 1 exploded.

[0029] Figure 7 This is a perspective view showing the vehicle lower structure 10 in Embodiment 1 exploded.

[0030] Figure 8 This is a cross-sectional view showing the vehicle lower structure 10A in Embodiment 2, compared to that in Embodiment 1. Figure 5 correspond.

[0031] Figure 9 This is a cross-sectional view showing the vehicle lower structure 10B in Embodiment 3, compared to that in Embodiment 1. Figure 5 correspond.

[0032] Figure 10 This is a cross-sectional view showing the vehicle lower structure 10C in Embodiment 4, compared to that in Embodiment 1. Figure 5 correspond.

[0033] Figure 11 This is a cross-sectional view showing the vehicle lower structure 10D in Embodiment 5, compared to that in Embodiment 1. Figure 5 correspond.

[0034] Figure 12 This is a cross-sectional view showing the vehicle lower structure 10E in Embodiment 6, compared to that in Embodiment 1. Figure 5 correspond. Detailed Implementation

[0035] The embodiments of this disclosure will now be described. In the embodiments described below, when numbers, quantities, etc., are mentioned, the scope of this disclosure is not necessarily limited to those numbers, quantities, etc., unless specifically stated otherwise. Each constituent element is not necessarily essential to this disclosure unless specifically stated otherwise. Sometimes the same reference numerals are used to designate the same parts and equivalent parts, and descriptions are not repeated.

[0036] In the following description, the arrows F, B, U, D, L, and R used in the diagrams indicate directions relative to the vehicle. Arrow F indicates "forward", arrow B indicates "rear", arrow U indicates "above", arrow D indicates "below", arrow L indicates "left", and arrow R indicates "rear".

[0037] [Implementation Method 1]

[0038] (Vehicle 1)

[0039] Reference Figures 1 to 7 The vehicle 1 having the vehicle lower structure 10 in Embodiment 1 will be described. Figure 1 This is a side view of vehicle 1. Figure 2 This is a plan view showing the vehicle compartment 13 and the vehicle substructure 10 of vehicle 1.

[0040] Vehicle 1 is, for example, an electric vehicle such as an electric car or a hybrid vehicle that can be driven by a motor. Vehicle 1 includes a passenger compartment 13 and a vehicle substructure 10.

[0041] (Vehicle substructure 10)

[0042] Figure 3 This is a cross-sectional view of the lower structure 10 of the vehicle as seen from the front side of vehicle 1, along with... Figure 4 The sectional view along line III-III is equivalent to that shown in the view. Figure 4 This is a cross-sectional view of the lower structure 10 of the vehicle viewed from the left side of vehicle 1, along with... Figure 3 The sectional view along line IV-IV is equivalent to that shown in the view. Figure 5 It is Figure 4 A portion of the image is shown in magnification. Figure 6 and Figure 4 The corresponding view is a sectional view showing the lower structure 10 of the vehicle disassembled. Figure 7 This is a perspective view showing the disassembled lower structure 10 of the vehicle.

[0043] like Figures 3-7 (in particular Figure 6 , Figure 7 As shown, the vehicle's lower structure 10 includes seats 11 and 12 for occupants, a floor carpet 14, intermediate components 21-23, reinforcing components 31 and 32, a lower frame 15, and an energy storage device 40.

[0044] (Lower frame 15)

[0045] Lower frame 15 ( Figure 7 It includes a pair of longitudinal beams 16L and 16R, a front beam 16F, a rear beam 16B, and crossbeams 17 and 18. The front beam 16F extends in the vehicle width direction, connecting the front portions of the pair of longitudinal beams 16L and 16R to each other. The rear beam 16B extends in the vehicle width direction, connecting the rear portions of the pair of longitudinal beams 16L and 16R to each other. The crossbeams 17 and 18 also extend in the vehicle width direction, connecting the midway portions of the pair of longitudinal beams 16L and 16R to each other in the vehicle's longitudinal direction.

[0046] In this embodiment, the vehicle lower structure 10 includes a pair of body frame members, and at least a portion of the intermediate member 21 (first intermediate member) described later is disposed between these pair of body frame members. For example, the pair of body frame members can be any two beams selected from a pair of longitudinal beams 16L and 16R, front beam 16F, and crossbeam 17. In this embodiment, the pair of longitudinal beams 16L and 16R, front beam 16F, and crossbeam 17 are arranged in a rectangular shape, with a space SP1 formed on their inner sides. Figure 6 , Figure 7 Similarly, a pair of longitudinal beams 16L, 16R and transverse beams 17, 18 are configured in a square shape, with a space SP2 formed on their inner sides.

[0047] A pair of longitudinal beams 16L and 16R, a crossbeam 18, and a rear beam 16B are arranged in a square frame, with a space SP3 formed on their inner sides. The vehicle lower structure 10 does not include components such as floor panels made of metal plates. The vehicle lower structure 10 extends vertically through the spaces SP1, SP2, and SP3 at the portions where they are located.

[0048] (Intermediate components 21-23)

[0049] Intermediate components 21 (first intermediate component), 22 (second intermediate component), and 23 are, for example, constructed from components containing foamed resin and have a block shape. The seat 11, described later, is positioned above the intermediate component 21. Intermediate components 21-23 can be constructed from components that are lighter and more flexible than metal. Intermediate components 21-23 each have approximately the same size and shape as spaces SP1, SP2, and SP3. Intermediate components 21-23 are arranged in a manner that fills spaces SP1, SP2, and SP3. Figure 6 , Figure 7 ).

[0050] (Floor Carpet 14)

[0051] Floor carpet 14 is a component that forms part of the vehicle compartment 13 above the floor carpet 14. For example... Figure 1 , Figure 2 As shown, inside the cabin 13, above the floor carpet 14 (above the intermediate member 21), a pair of seats 11 (first seats) are arranged side by side, and behind them is a seat 12 (second seat).

[0052] like Figure 6As shown, the floor carpet 14 is positioned above the intermediate members 21-23. The floor carpet 14 may be positioned in direct contact with the upper surfaces 21U, 22U, and 23U of the intermediate members 21, 22, and 23. Between the floor carpet 14 and the intermediate members 21-23, appropriate fasteners to prevent movement of the floor carpet 14 and anti-slip structures (face-fitting fasteners, Velcro, etc.) may be provided. In the vehicle 1 of this embodiment, the floor carpet 14 is composed of a single member, but the floor carpet 14 may also be composed of multiple members.

[0053] (Electric storage device 40)

[0054] like Figures 3-6 As shown, the energy storage device 40 is positioned below the intermediate components 21-23. The energy storage device 40 ( Figure 3 The device includes an energy storage module 41 and a housing 42. The energy storage module 41 includes a plurality of energy storage units 41C housed in the housing 42 and arranged in a horizontal direction. The energy storage units 41C are configured as batteries that store electricity supplied to the motor. The plurality of energy storage units 41C may be stacked in the vehicle width direction or in the vehicle front-rear direction.

[0055] Casing 42 ( Figure 3 It has a top plate 43, an adhesive 44, side walls 45, an inner wall 46, a support member 47, and a bottom plate 48. The top plate 43, a pair of side walls 45, and the bottom plate 48 are made of, for example, FRP, and these components form the outer contour structure of the housing 42, in which the adhesive 44, the inner wall 46, the support member 47, and the energy storage module 41 are disposed.

[0056] The energy storage module 41 (each of the plurality of energy storage units 41C) is bonded to the top plate 43 via adhesive 44. Internal walls 46 are respectively disposed on both outer sides of the energy storage module 41 (the plurality of energy storage units 41C) in the stacking direction. A support member 47, having a plate-like shape, is disposed between the energy storage module 41 and the bottom plate 48. The internal walls 46 are integrated with the top plate 43 by fastener 61 and with the bottom plate 48 by fastener 62.

[0057] The energy storage device 40, configured as described above, is connected by multiple fastening connections 63. Figure 3 The energy storage device 40 is then securely connected to, for example, longitudinal beams 16L and 16R in the lower frame 15. Thus, the energy storage device 40 is supported by the lower frame 15. Seals 51 and 52 can be disposed between the energy storage device 40 (top plate 43) and the lower frame 15 (front beam 16F, longitudinal beam 16R). Figure 4 , Figure 6 ).

[0058] like Figure 6As shown, the energy storage device 40 is disposed below the intermediate members 21-23. Alternatively, the energy storage device 40 (top plate 43) may be disposed in direct contact with the lower surfaces 21D, 22D, and 23D of the intermediate members 21, 22, and 23 (see also [reference]). Figure 3 ).

[0059] (Strengthening components 31 and 32)

[0060] The reinforcing members 31 and 32 are made of GFRP, metal, or other materials, and are for example, members with higher rigidity than the intermediate members 21 to 23. In the vehicle lower structure 10, reinforcing members 31 (first reinforcing member) and 32 (second reinforcing member) with plate-like shapes can be used. Here, reinforcing member 31 is disposed on the upper surface 21U of the intermediate member 21, and reinforcing member 32 is disposed on the upper surface 22U of the intermediate member 22.

[0061] The reinforcing member 31 is provided to extend from the front beam 16F toward the rear side in the vehicle's longitudinal direction. The reinforcing member 31 can be detachably or non-detachably engaged with the front beam 16F. Here, the reinforcing members 31 and 32 are arranged to extend in a surface direction that includes both the vehicle width direction and the vehicle's left-right direction.

[0062] The vehicle lower structure 10 of this embodiment is characterized in that it has a region below the seat 11 in the vertical direction of the vehicle where no reinforcing member 31 is provided. For example, even if the seat 11 is projected downward in the vertical direction, the projected image does not overlap with the reinforcing member 31. In addition, for example, even if the seat 12 is projected downward in the vertical direction, the projected image does not overlap with the reinforcing member 32.

[0063] (Support area 31A)

[0064] For example, the reinforcing member 31 has a support region 31A (first support region). The support region 31A is defined as follows. That is, as... Figure 2 As shown, right reference lines 11RC (first right reference line) and left reference lines 11LC (first left reference line) extending in the vehicle longitudinal direction from the right end 11R and left end 11L of the seat 11 along the vehicle width direction are respectively defined. Furthermore, as... Figure 2 as well as Figure 5 As shown, when the support region 31A of the reinforcing member 31 is projected toward the upper side in the vertical direction, a first projection image 31M is formed by this projection. The first projection image 31M is located in front of the front end 11T of the seat 11 and between the right reference line 11RC and the left reference line 11LC. The reinforcing member 31 has a support region 31A as defined above.

[0065] (Functions and effects)

[0066] As described above, the vehicle lower structure 10 does not include components such as floor panels made of metal steel plates. The support area 31A of the reinforcing member 31 is an area that easily bears the load of the occupant sitting on the seat 11. Even if there is a situation where the rigidity of the intermediate member 21 alone cannot sufficiently bear the load, the presence of the reinforcing member 31 allows the intermediate member 21 and the reinforcing member 31 to cooperate in bearing the occupant's load. That is, according to the vehicle lower structure 10 of Embodiment 1, the presence of the reinforcing member 31 ensures rigidity, and the presence of an area below the seat 11 in the vertical direction of the vehicle without the reinforcing member 31 suppresses the increase in weight of the vehicle lower structure 10.

[0067] Furthermore, the reinforcing member 31 may have at least a support region 31A as defined above. This configuration ensures rigidity and suppresses weight increase as part of the vehicle's lower structure 10.

[0068] In Embodiment 1 described above, the reinforcing member 31 is provided such that it extends from the front beam 16F toward the rearward side in the vehicle's longitudinal direction. The reinforcing member 31 is not limited to being disposed on the upper surface 21U of the intermediate member 21; it can also be disposed embedded within the intermediate member 21. Furthermore, the reinforcing member 31 can be disposed at a position away from the front beam 16F. For example, the reinforcing member 31 can be provided in a bridging manner between the longitudinal beams 16L and 16R. At least a portion of the intermediate member 21 is disposed between the aforementioned pair of body frame members, which can be any two beams selected from the pair of longitudinal beams 16L and 16R, the front beam 16F, and the crossbeam 17. When the reinforcing member 31 is engaged with the front beam 16F and the longitudinal beams 16L and 16R, the reinforcing member 31 can withstand greater loads.

[0069] (Strengthening component 32)

[0070] Reference Figure 2 , Figure 5 Here, the reinforcing member 32 is provided such that it extends from the crossbeam 17 toward the rear side in the vehicle's longitudinal direction. The reinforcing member 32 can be detachably or non-detachably engaged with the crossbeam 17.

[0071] The reinforcing member 32 has a support region 32A (second support region). The support region 32A is defined as follows. That is, as... Figure 2 As shown, right reference lines 12RC (second right reference lines) and left reference lines 12LC (second left reference lines) extending in the vehicle longitudinal direction along the right end 12R and left end 12L of seat 12 are respectively defined. Furthermore, as... Figure 2 as well as Figure 5As shown, when the support region 32A of the reinforcing member 32 is projected toward the upper side in the vertical direction, a second projection image 32M is formed by this projection. The second projection image 32M is located in front of the front end 12T of the seat 12 and between the right reference line 12RC and the left reference line 12LC. The reinforcing member 32 has a support region 32A as defined above.

[0072] The support area 32A of the reinforcing member 32 is an area that can easily bear the load of the occupant sitting on the seat 12. Even if there is a situation where the rigidity of the intermediate member 22 alone cannot sufficiently bear the load, the presence of the reinforcing member 32 allows the intermediate member 22 and the reinforcing member 32 to cooperate in bearing the occupant's load. That is, according to the vehicle lower structure 10 of Embodiment 1, the presence of the reinforcing member 32 can ensure rigidity and suppress the increase in weight of the vehicle lower structure 10.

[0073] The reinforcing member 32 may have at least a support region 32A as defined above. This configuration ensures rigidity and suppresses weight gain as part of the vehicle's lower structure 10.

[0074] In Embodiment 1 described above, the reinforcing member 32 extends rearward from the crossbeam 17 in the vehicle's longitudinal direction. The reinforcing member 32 is not limited to being disposed on the upper surface 22U of the intermediate member 22; it can also be embedded within the intermediate member 22. Furthermore, the reinforcing member 32 can be disposed away from the crossbeam 17. For example, the reinforcing member 32 can be arranged in a bridging manner between the longitudinal beams 16L and 16R. The reinforcing member 32 can extend forward from the crossbeam 18 in the vehicle's longitudinal direction; if the crossbeam 18 is not present, the reinforcing member 32 can extend forward from the rear beam 16B in the vehicle's longitudinal direction. When the reinforcing member 32 is engaged with these beams, it can withstand greater loads.

[0075] [Implementation Method 2]

[0076] Figure 8 This is a cross-sectional view showing the vehicle lower structure 10A in Embodiment 2, compared to that in Embodiment 1. Figure 5 correspond.

[0077] In the above-described embodiment 1, the upper surface of the reinforcing member 31 constitutes the support region 31A. The first projection image 31M formed by the projection of the support region 31A is located in front of the front end 11T of the seat 11 and is located between the right reference line 11RC and the left reference line 11LC.

[0078] In this second embodiment, a portion of the upper surface of the reinforcing member 31 constitutes the support region 31A. In other words, when the upper surface of the reinforcing member 31 is projected in the same manner as described above, the region corresponding to the portion located further forward than the front end 11T of the seat 11 and situated between the right reference line 11RC and the left reference line 11LC corresponds to the support region 31A. With this configuration, the same function and effect as in the first embodiment can be achieved.

[0079] Similarly, in this embodiment 2, a portion of the upper surface of the reinforcing member 32 constitutes the support region 32A. In other words, when the upper surface of the reinforcing member 32 is projected in the same manner as described above, the region corresponding to the portion located further forward than the front end 12T of the seat 12 and situated between the right reference line 12RC and the left reference line 12LC corresponds to the support region 32A. With this configuration, the same function and effect as in embodiment 1 can be obtained.

[0080] [Implementation Method 3]

[0081] Figure 9 This is a cross-sectional view showing the vehicle lower structure 10B in Embodiment 3, compared to that in Embodiment 1. Figure 5 correspond.

[0082] In the vehicle's lower structure 10B, the energy storage device 40 also includes a rigid plate 70. The rigid plate 70 functions as a reinforcing member for the top plate 43 of the housing 42 of the energy storage device 40. The rigid plate 70 is preferably constructed of a material or structure having higher strength than the top plate 43. In this embodiment, the rigid plate 70 has multiple plates 71 to 73, each disposed between the top plate 43 and the energy storage module 41.

[0083] Here, when the reinforcing member 31 is projected downwards in the vertical direction, at least a portion of the third projection image 31N formed by this projection is located at a position that does not overlap with the rigid plate 70 (i.e., the plurality of plates 71 to 73). Similarly, when the reinforcing member 32 is projected downwards in the vertical direction, at least a portion of the third projection image 32N formed by this projection is located at a position that does not overlap with the rigid plate 70 (i.e., the plurality of plates 71 to 73).

[0084] The third projected images 31N and 32N of the reinforcing members 31 and 32 being located at positions that do not overlap with the rigid plate 70 means that the rigid plate 70 is not present at those positions. Even if the rigid plate 70 is absent as described above, rigidity can be ensured by the presence of the reinforcing members 31 and 32. Correspondingly, by omitting the presence of the rigid plate 70, the vehicle substructure can be manufactured at a lower cost.

[0085] [Implementation Method 4]

[0086] Figure 10 This is a cross-sectional view showing the vehicle lower structure 10C in Embodiment 4, compared to that in Embodiment 1. Figure 5 Correspondingly, Embodiment 4 can be implemented as a variation of Embodiment 3 described above.

[0087] In the vehicle's lower structure 10C, the energy storage device 40 also includes buffer members 81 and 82. Buffer members 81 and 82 are disposed between the top plate 43 and the energy storage module 41. When the reinforcing members 31 and 32 are projected downwards in the vertical direction, at least a portion of the third projection images 31N and 32N formed by this projection is located at a position overlapping with the buffer members 81 and 82.

[0088] In embodiment 3 described above, even if there are parts of the rigid plate 70 that are not present as described above, buffer members 81 and 82 are provided to fill these parts. It is preferable, for example, that the buffer members 81 and 82 are made of components that are less expensive than the rigid plate 70 and the adhesive 44. With this configuration, the vehicle's lower structure can be manufactured at a lower cost.

[0089] [Implementation Method 5]

[0090] Figure 11 This is a cross-sectional view showing the vehicle lower structure 10D in Embodiment 5, compared to that in Embodiment 1. Figure 5 Correspondingly, Embodiment 5 can be implemented as a variation of Embodiment 3 described above.

[0091] In the vehicle lower structure 10D, the rigid plate 70 has an overlapping portion 70P that overlaps with the third projected images 31N and 32N, and a non-overlapping portion 70W that does not overlap with the third projected images 31N and 32N. That is, when the reinforcing members 31 and 32 are projected downwards in the vertical direction, the third projected images 31N and 32N formed by this projection are located at the position that overlaps with the overlapping portion 70P of the rigid plate 70.

[0092] Here, the overlapping portion 70P of the rigid plate 70 does not engage with the top plate 43, as... Figure 11 As shown, there is no adhesive 44 between the overlapping portion 70P of the rigid plate 70 and the top plate 43. On the other hand, at least a portion of the rigid plate 70 other than the overlapping portion 70P (the non-overlapping portion 70W) is bonded to the top plate 43. In this embodiment, the rigid plate 70, except for the overlapping portion 70P, is bonded to the top plate 43 almost entirely. Since there is no adhesive 44 between the overlapping portion 70P of the rigid plate 70 and the top plate 43, the vehicle lower structure can be manufactured at a lower cost accordingly.

[0093] Furthermore, in the unbonded area of ​​the overlapping portion 70P, a space is formed due to the absence of adhesive 44. When a load is input from the upper surface of the floor, the floor deforms, the intermediate member 21 and the like also deform, and then the top plate 43 also deforms. By absorbing (mitigating) the displacement associated with this deformation by the aforementioned space, the load input to the rigid plate 70 can be reduced.

[0094] [Implementation Method 6]

[0095] Figure 12 This is a cross-sectional view showing the vehicle lower structure 10E in Embodiment 6, compared to that in Embodiment 1. Figure 5 Correspondingly, Implementation Method 6 can be implemented as a variation of Implementation Method 3 described above.

[0096] In the vehicle's lower structure 10E, the overlapping portion 70P of the rigid plate 70 joins with the top plate 43, as shown below. Figure 12 As shown, an adhesive 44 exists between the overlapping portion 70P of the rigid plate 70 and the top plate 43. On the other hand, at least a portion of the rigid plate 70 other than the overlapping portion 70P (the non-overlapping portion 70W) is not bonded to the top plate 43. In this embodiment, substantially the entire rigid plate 70 other than the overlapping portion 70P is not bonded to the top plate 43. Since there is no adhesive 44 between the non-overlapping portion 70W of the rigid plate 70 and the top plate 43, the vehicle lower structure can be manufactured at a lower cost accordingly.

[0097] Furthermore, since the overlapping portion 70P is easily located under the occupant's feet, the rigid plate 70 can be reinforced by joining the overlapping portion 70P of the rigid plate 70 to the top plate 43. On the other hand, below the seat 11, regarding the portion of the rigid plate 70 that does not overlap with the third projected image 31N (the non-overlapping portion 70W), it is difficult to directly input loads caused by the occupant's footsteps. Therefore, by not joining the top plate 43 at this non-overlapping portion 70W of the rigid plate 70, a space is formed at that location, which can be used to absorb the vertical deviation of the crossbeam 17 and the energy storage device 40, as well as the displacement caused by relative vibration.

[0098] Embodiments of this utility model have been described, but it should be considered that the embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of this utility model is defined by the claims and is intended to include all modifications within the scope and equivalent meaning of the claims.

Claims

1. A vehicle underbody structure, characterized in that, have: A pair of vehicle body frame components; At least a portion of the first intermediate member is disposed between the pair of vehicle frame members; An energy storage device is disposed below the first intermediate component; The first seat is positioned above the first intermediate member; as well as The first reinforcing member is disposed inside the first intermediate member or on the upper surface of the first intermediate member. There is an area below the first seat in the vertical direction of the vehicle where the first reinforcing member is not installed.

2. The vehicle lower structure according to claim 1, The vehicle's lower structure includes a lower frame, which comprises a pair of longitudinal beams, a front beam connecting the front portions of the pair of longitudinal beams to each other, a rear beam connecting the rear portions of the pair of longitudinal beams to each other, and a crossbeam connecting the midpoints of the pair of longitudinal beams in the vehicle's longitudinal direction to each other. The pair of vehicle frame components are any two beams selected from a pair of longitudinal beams, the front beam, and the cross beam. The first intermediate member is configured to fill the space formed by the pair of longitudinal beams, the front beam, and the crossbeam inside them. The first reinforcing member has a first supporting region. A first right reference line and a first left reference line are defined, extending along the right and left ends of the first seat in the vehicle width direction in the vehicle front-rear direction, respectively. Moreover, when the first support area is projected toward the upper side in the vertical direction, the first projection image formed by the projection is located in front of the front end of the first seat and between the first right reference line and the first left reference line.

3. The vehicle substructure according to claim 2, The first reinforcing member is provided to extend from the front beam toward the rear side in the vehicle's longitudinal direction.

4. The vehicle substructure according to claim 2 or 3, The lower frame includes multiple crossbeams. The vehicle substructure also includes a second intermediate member configured to fill the space formed by the pair of longitudinal beams and the plurality of transverse beams on their inner sides. The energy storage device is disposed below both the first intermediate component and the second intermediate component. The vehicle's lower structure also includes a second seat and a second reinforcing member disposed inside the second intermediate member or on the upper surface of the second intermediate member. The second reinforcing member has a second support area. A second right-side reference line and a second left-side reference line are defined, extending along the right and left ends of the second seat in the vehicle width direction in the vehicle front-rear direction, respectively. Moreover, when the second support area is projected toward the upper side in the vertical direction, the second projection image formed by the projection is located in front of the front end of the second seat and between the second right-side reference line and the second left-side reference line.

5. The vehicle substructure according to claim 4, The second reinforcing member is provided such that it extends from any of the plurality of crossbeams toward the front or rear side in the vehicle's longitudinal direction.

6. The vehicle substructure according to claim 2 or 3, The energy storage device includes: An energy storage module has multiple energy storage units arranged in a horizontal direction; The housing has a top plate and a bottom plate, and houses the energy storage module; as well as A rigid plate is disposed between the top plate and the energy storage module. When the first reinforcing member is projected downwards in the vertical direction, at least a portion of the third projected image formed by the projection is located at a position that does not overlap with the rigid plate.

7. The vehicle substructure according to claim 6, The energy storage device also includes a buffer component disposed between the top plate and the energy storage module. At least a portion of the third projected image is located at a position overlapping with the buffer member.

8. The vehicle substructure according to claim 6, The rigid plate has an overlapping portion that overlaps with the third projected image. The overlapping portion of the rigid plate does not engage with the top plate. At least a portion of the rigid plate other than the overlapping portion is engaged with the top plate.

9. The vehicle substructure according to claim 6, The rigid plate has an overlapping portion that overlaps with the third projected image. The overlapping portion of the rigid plate engages with the top plate. At least a portion of the rigid plate other than the overlapping portion is not engaged with the top plate.

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