Vehicle

Abstract

To provide an art which avoids interference of a floor panel deformed by a collision load with a battery pack unit.SOLUTION: A vehicle may include: a floor panel of a passenger compartment; a battery pack unit located below the floor panel; and a reinforcement plate extending in a vehicle front-back direction along the floor panel and joined to the floor panel. The floor panel may have: a first area located adjacent to a front edge of the floor panel; a second area located behind and above the first area; and a step area extending in a vehicle lateral direction between the first area and the second area. The reinforcement plate may extend from the first area to the second area beyond the step area.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a vehicle. [Background technology]

[0002] Patent Document 1 describes a vehicle. The vehicle includes a floor panel and a battery pack unit disposed below the floor panel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-38401 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned vehicle, when a frontal collision occurs, the floor panel may be deformed by the collision load from the front. Because the battery pack unit is located below the floor panel, if the floor panel is bent so as to protrude downward, the floor panel may interfere with the battery pack unit. This specification provides a technology that can avoid such a problem. [Means for solving the problem]

[0005] The technology disclosed in this specification is embodied in a vehicle. In a first aspect, the vehicle may include a floor panel of the vehicle interior, a battery pack unit located below the floor panel, and a reinforcing plate extending along the floor panel in the vehicle front-rear direction and joined to the floor panel. The floor panel may have a first region adjacent to a front edge thereof, a second region located rearward of and above the first region, and a step region extending in the vehicle left-right direction between the first region and the second region. The reinforcing plate may extend from the first region across the step region to the second region.

[0006] In the above-mentioned vehicle, the floor panel is provided with a height difference so that the second area located at the rear is higher than the first area located at the front. The reinforcing plate provided on the floor panel extends in the vehicle longitudinal direction from the first area to the second area, over the step area. With this configuration, for example, when a frontal collision occurs on the vehicle and a collision load from the front is applied to the floor panel, the collision load transmitted through the reinforcing plate from the first area to the second area acts to lift the second area at the step area. As a result, the floor panel is bent together with the reinforcing plate so as to be displaced upward (so-called mountain fold). This makes it possible to prevent the floor panel deformed by the collision load from interfering with the battery pack unit.

[0007] In a second aspect, in the first aspect, the step area of ​​the floor panel may be located forward of the center of the reinforcing plate in the vehicle front-rear direction. With this configuration, the floor panel is easily bent so as to be displaced upward.

[0008] In a third aspect, in the second aspect, the vehicle may further include a floor cross member extending in the left-right direction of the vehicle along the floor panel and to which the rear end of the reinforcing plate is joined. With this configuration, the position of the rear end of the reinforcing plate is restrained by the floor cross member, so that the floor panel is likely to bend so as to be displaced upward.

[0009] In a fourth aspect, in the third aspect, the vehicle may further include a side sill extending in the vehicle longitudinal direction along the side edge of the floor panel. In this case, the reinforcing plate may be located between the side sill and a center tunnel provided in the center of the floor panel in the vehicle transverse direction. The area between the side sill and the center tunnel is an area where the floor panel is likely to deform due to a front collision load because the floor panel has a relatively flat structure. By applying the configuration of the present technology to such an area, it is possible to effectively suppress interference of the floor panel with the battery pack unit.

[0010] In a fifth aspect, the vehicle according to the fourth aspect may further include a dash cross member extending in the left-right direction along a front edge of the floor panel, and a front side member extending forward from the dash cross member. The reinforcing plate may be located on a rearward extension of the front side member. With this configuration, a frontal collision load is easily transmitted from the front side member to the reinforcing plate, and the floor panel is easily bent so as to be displaced upward. [Brief description of the drawings]

[0011] [Figure 1] 1 shows a diagram illustrating the configuration of a vehicle 10. FIG. [Diagram 2] 1 is a plan view showing the internal configuration of the lower part of a vehicle 10. FIG. [Diagram 3] 3 shows an end view taken along line III-III in FIG. 2. [Figure 4] 4 shows an end view taken along line IV-IV in FIG. 2. [Diagram 5] 5 and 6 are diagrams for explaining a collision load F1 during a frontal collision.The beads of the reinforcing plate 30 are omitted in Figs. [Figure 6] 6A and 6B are diagrams for explaining collision loads F1 and F2 during a frontal collision, Fig. 6A shows a state before floor panel 22 is deformed, and Fig. 6B shows a state after floor panel 22 is deformed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] A vehicle 10 according to an embodiment will be described with reference to the drawings. As shown in Fig. 1, the vehicle 10 includes a plurality of wheels 14f, 14r, a vehicle body 12, a driving motor 16, a power conversion device 18, and a battery pack unit 20. The vehicle 10 is an electric vehicle. The vehicle 10 is an electric vehicle that runs by driving at least one of the plurality of wheels 14f, 14r by the driving motor 16.

[0013] Here, the direction FR in the drawings indicates the front in the fore-and-aft direction of the vehicle 10, and the direction RR indicates the rear in the fore-and-aft direction of the vehicle 10. The direction LH indicates the left in the left-and-aft direction of the vehicle 10, and the direction RH indicates the right in the left-and-aft direction of the vehicle 10. The direction UP indicates the upward direction in the vertical direction of the vehicle 10, and the direction DW indicates the downward direction in the vertical direction of the vehicle 10.

[0014] The traveling motor 16 is driven by power supplied from the battery pack unit 20 via a power converter 18. The power converter 18 converts DC power from the battery pack unit 20 and supplies AC power to the traveling motor 16. The wheels 14f, 14r include a pair of front wheels 14f and a pair of rear wheels 14r. In this embodiment, the traveling motor 16 drives, for example, the front wheels 14f. The vehicle body 12 is formed using a metal such as steel or aluminum alloy. The vehicle body 12 has a passenger compartment 12c and a front room 12f located in front of the passenger compartment 12c. The passenger compartment 12c is a space in which passengers of the vehicle 10 board. The front room 12f is located between the pair of front wheels 14f and is a space in which a drive device such as the traveling motor 16 for the front wheels 14f is arranged. The battery pack unit 20 is disposed below the passenger compartment 12c. The battery pack unit 20 has a battery pack that houses a plurality of battery cells. The battery pack unit 20 is attached to the vehicle body 12.

[0015] 2 to 4, the lower structure of the vehicle 10 will be described. As shown in Fig. 2, the vehicle body 12 has a floor panel 22, a pair of side sills 24, a dash cross member 26, a floor cross member 28, a pair of reinforcing plates 30, a pair of front side members 32, and a bumper reinforcement 34.

[0016] The floor panel 22 is generally a plate member. The floor panel 22 defines the floor of the vehicle interior 12c. That is, the above-mentioned battery pack unit 20 is located below the floor panel 22. The floor panel 22 has a left floor pan 22a, a right floor pan 22b, and a center tunnel 22c. Each of the floor pans 22a, 22b is a plate member. The center tunnel 22c is a hat-shaped plate member. The center tunnel 22c is provided in the center of the floor panel 22 in the left-right direction. The center tunnel 22c is located between the left floor pan 22a and the right floor pan 22b, and is joined to the left and right floor pans 22a, 22b. The center tunnel 22c extends in the front-rear direction.

[0017] The pair of reinforcing plates 30 are disposed on the floor panel 22. The left reinforcing plate 30 of the pair of reinforcing plates 30 is located on the left floor pan 22a, and the right reinforcing plate 30 of the pair of reinforcing plates 30 is located on the right floor pan 22b. Each reinforcing plate 30 extends in the front-rear direction along the floor panel 22. Each reinforcing plate 30 is a plate-shaped reinforcing member that is elongated in the front-rear direction and has, for example, a rectangular shape. Each reinforcing plate 30 is joined to the floor panel 22.

[0018] The pair of side sills 24 are cylindrical members. As shown in Figures 2 and 3, each side sill 24 extends in the front-rear direction along the right edge 22e of the floor panel 22. The left side sill 24 extends in the front-rear direction along the left edge 22d of the floor panel 22. The right side sill 24 is joined to the floor panel 22 at the left edge 22d and the right edge 22e.

[0019] The dash cross member 26 is a plate member that defines the boundary between the passenger compartment 12c and the front room 12f. The dash cross member 26 extends in the left-right direction along the front edge 22f of the floor panel 22. As shown in FIG. 4, the rear end of the dash cross member 26 is joined to the floor panel 22.

[0020] As shown in Fig. 4, the floor cross member 28 is disposed on the floor panel 22. The floor cross member 28 is a hat-shaped plate member. The floor cross member 28 extends in the left-right direction along the floor panel 22. As an example, the floor cross member 28 is located forward of the center of gravity of the vehicle 10.

[0021] The pair of front side members 32 extend forward from the dash cross member 26. The rear ends of the pair of front side members 32 are joined to the dash cross member 26. A bumper reinforcement 34 is joined to the front end of each of the pair of front side members 32. The bumper reinforcement 34 extends in the left-right direction.

[0022] Next, the configurations of the floor panel 22 and the reinforcing plate 30 will be described in detail. As shown in Fig. 4, the floor panel 22 has a first region R1, a second region R2, and a third region R3. The first region R1 is adjacent to the front edge 22f of the floor panel 22. The second region R2 is located rearward of and above the first region R1. The third region R3 is a step region extending in the left-right direction between the first region R1 and the second region R2.

[0023] As shown in FIG. 2, the right reinforcing plate 30 is located between the right side sill 24 and the center tunnel 22c of the floor panel 22. Specifically, the right reinforcing plate 30 is located on an extension line X to the rear of the front side member 32. A rear end 30r of the right reinforcing plate 30 is joined to the floor cross member 28. The left reinforcing plate 30 can be configured in the same manner as the right reinforcing plate 30. Hereinafter, the left and right reinforcing plates 30 will be simply referred to as "reinforcing plates 30" in the following description.

[0024] As described above, the reinforcing plate 30 extends in the front-rear direction along the floor panel 22. Specifically, as shown in Fig. 4, the reinforcing plate 30 extends from the first region R1, past the third region R3, to the second region R2 of the floor panel 22. The third region R3 of the floor panel 22 is located forward of the center 30c of the reinforcing plate 30 in the front-rear direction.

[0025] As shown in Fig. 2 and Fig. 3, the reinforcing plate 30 is provided with two beads 30b extending in parallel in the front-rear direction. The beads 30b here are linearly extending protrusions (so-called protruding portions), and can be formed, for example, by press working. Providing the beads 30b on the reinforcing plate 30 can increase the rigidity of the reinforcing plate 30. However, the specific configuration (e.g., shape, position, number, etc.) of the reinforcing plate 30 and the beads 30b provided thereon is not particularly limited, and can be appropriately adjusted according to the required rigidity. In a modified example, the reinforcing plate 30 does not need to be provided with the beads 30b.

[0026] In the vehicle 10 described above, when a frontal collision occurs, the floor panel 22 may be deformed by a collision load from the front. Because the battery pack unit 20 is located below the floor panel 22, if the floor panel 22 is bent so as to protrude downward, the floor panel 22 may interfere with the battery pack unit 20.

[0027] In order to avoid the above-mentioned problems, the vehicle 10 in this embodiment is devised as follows. This will be described with reference to FIG. 5 and FIG. 6(A) to FIG. 6(B). In the vehicle 10 in this embodiment, a height difference is provided in the floor panel 22 so that the second region R2 located at the rear is higher than the first region R1 located at the front. The reinforcing plate 30 provided on the floor panel 22 extends in the vehicle front-rear direction from the first region R1 across the step region (i.e., the third region R3) to the second region R2. With this configuration, as shown in FIG. 5 and FIG. 6(a), for example, when a frontal collision occurs on the vehicle 10 and a collision load F1 from the front is applied to the floor panel 22, the collision load F2 transmitted through the reinforcing plate 30 from the first region R1 to the second region R2 acts to lift the second region R2 in the third region R3. As a result, as shown in FIG. 6(B), the floor panel 22 is bent together with the reinforcing plate 30 so as to be displaced upward (so-called mountain fold shape). This makes it possible to prevent floor panel 22, which has been deformed by a collision load, from interfering with battery pack unit 20.

[0028] As described above, the third region R3 of the floor panel 22 of the vehicle 10 in this embodiment is located forward of the center 30c of the reinforcing plate 30 in the vehicle front-rear direction. With this configuration, the floor panel 22 is easily bent so as to be displaced upward. However, this is not limited thereto, and the third region R3 may be located above the center 30c in the vehicle front-rear direction, or may be located rearward of the center 30c in the vehicle front-rear direction.

[0029] In this embodiment, the rear end 30r of the reinforcing plate 30 is directly joined to the floor cross member 28. According to this configuration, the position of the rear end 30r of the reinforcing plate 30 is restrained by the floor cross member 28, so that the floor panel 22 is easily bent so as to be displaced upward. On the other hand, the front end 30f of the reinforcing plate 30 is indirectly joined to the dash cross member 26 via a member not shown on the underside thereof, although this is not shown. The reinforcing plate 30 here is superimposed on the front end 30f side thereof, with a member not shown sandwiched between the dash cross member 26 and the front end 30f side thereof. However, this is not limited to the above-mentioned embodiment, and the rear end 30r of the reinforcing plate 30 may be indirectly joined to the floor cross member 28, or the front end 30f of the reinforcing plate 30 may be directly joined to the dash cross member 26.

[0030] In this embodiment, the reinforcing plate 30 is located between the side sill 24 and a center tunnel 22c provided at the center of the floor panel 22 in the left-right direction of the vehicle. The area between the side sill 24 and the center tunnel 22c is an area where the floor panel 22 (i.e., the floor pans 22a, 22b) is likely to deform due to a front collision load F1 because the floor panel 22 (i.e., the floor pans 22a, 22b) has a relatively flat structure. By applying the configuration of the present technology to such an area, it is possible to effectively prevent the floor panel 22 from interfering with the battery pack unit 20.

[0031] In this embodiment, the reinforcing plate 30 is located on an extension line X to the rear of the front side member 32. With this configuration, as shown in FIG 5, a front collision load F1 is easily transmitted from the front side member 32 to the reinforcing plate 30, and the floor panel 22 is easily bent so as to be displaced upward.

[0032] Specific examples of the technology disclosed in this specification have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes to the specific examples exemplified above. The technical elements described in this specification or the drawings exhibit technical utility alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. The technology exemplified in this specification or the drawings can achieve multiple objectives simultaneously, and achieving one of the objectives itself has technical utility. [Explanation of symbols]

[0033] 10: Vehicle interior 12c: Cabin 20: Battery pack unit 22:Floor panel 22a, 22b: Floor pan 22c: Center Tunnel 22d, 22e: Side edge 22f: Leading edge 24: Side sill 26: Dash cross member 28: Floor cross member 30: Reinforcement plate 30c: center 30f: Front end 30r: Rear end 32: Front side member R1: 1st area R2: 2nd area R3: Third area X: Extension line

Claims

1. The floor panels of the vehicle compartment, a battery pack unit located below the floor panel; a reinforcing plate extending along the floor panel in a vehicle front-rear direction and joined to the floor panel; Equipped with The floor panel has a first region adjacent to a front edge thereof, a second region located rearward of the first region and higher than the first region, and a step region extending in the left-right direction of the vehicle between the first region and the second region, The reinforcing plate extends from the first region across the step region to the second region. vehicle.

2. The vehicle according to claim 1 , wherein the step area of ​​the floor panel is located forward of a center of the reinforcing plate in the vehicle front-rear direction.

3. The vehicle according to claim 2 , further comprising a floor cross member extending in a left-right direction of the vehicle along the floor panel, and to which a rear end of the reinforcing plate is joined.

4. Further, a side sill extending in the front-rear direction of the vehicle along a side edge of the floor panel is provided, 4. The vehicle according to claim 3, wherein the reinforcing plate is located between the side sill and a center tunnel provided at a center of the floor panel in a left-right direction of the vehicle.

5. a dash cross member extending in the left-right direction along the front edge of the floor panel; A front side member extending forward from the dash cross member, The reinforcing plate is located on a rear extension line of the front side member.

5. A vehicle as claimed in claim 4.

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