Vehicle body structure

Abstract

The present invention provides a vehicle body structure that allows for firm support of the seats while efficiently arranging the cross members. [Solution] The vehicle comprises a vehicle frame 2 and a battery case 10 attached to the vehicle frame 2. The battery case 10 has a housing section 11 for housing the battery and a battery cover 12 that covers the housing section 11 from above. On the upper surface of the battery cover 12 are a cross member 4 extending in the direction of the vehicle width and a seat support frame 6 extending from the cross member 4 in the front-rear direction of the vehicle and supporting the seat of the vehicle 1.

Description

Technical Field

[0001] The present invention relates to a vehicle body structure.

Background Art

[0002] In recent years, in order to enable more people to access affordable, reliable, sustainable, and advanced energy, research and development on weight reduction that contributes to energy efficiency has been carried out. For example, conventionally, there is known a structure including a pair of side members, first and second cross members orthogonal to the pair of side members, and a recessed space surrounded by the pair of side members and the first and second cross members for arranging a battery (for example, Patent Document 1, etc.). In such a structure, a lid member is provided to close the upper opening of the recessed space so that the upper surface is flush with the floor surface of the vehicle. Also, a third cross member extending in the same direction as the first and second cross members is disposed on the lower surface of the lid member. And a seat rail bracket is installed on the first and third cross members to attach the seat.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in this technology related to weight reduction, it is an issue to efficiently arrange the cross members while enabling the seat to be firmly supported. However, in the conventional technology, cross members (first cross member, third cross member) are arranged in the recessed space, and a battery is accommodated between them. Therefore, it was necessary to arrange the cross members at positions corresponding to the size of the battery. Furthermore, since the seat brackets are installed on top of the cross members, the arrangement of the cross members according to the seat position was also required.

[0005] Furthermore, cross members are components that contribute to the strength and rigidity performance of the vehicle body. Therefore, they need to be positioned in a more efficient location to meet these performance requirements. Therefore, constraints imposed by battery size and seat mounting position prevent the crossmember from being positioned optimally for rigidity and strength performance. This necessitates reinforcement, leading to increased weight and leaving room for further improvement. This invention aims to provide a vehicle body structure that can firmly support the seat while efficiently arranging the cross members, thereby solving the above-mentioned problems. [Means for solving the problem]

[0006] To solve the aforementioned problems, the vehicle body structure of the present invention comprises a vehicle body frame and a battery case attached to the vehicle body frame. The battery case has a housing section for housing a battery and a battery cover that covers the housing section from above. The upper surface of the battery cover is characterized in that a cross member extending along the vehicle width direction and a seat support frame extending from the cross member in the vehicle front-rear direction for supporting the vehicle's seat are installed. [Effects of the Invention]

[0007] According to the present invention, a vehicle body structure is provided that allows for the firm support of the seat while efficiently arranging the cross members. [Brief explanation of the drawing]

[0008] [Figure 1] This is a plan view of the vehicle body structure according to the first embodiment of the present invention, with the seats removed and the underside of the vehicle viewed from above. [Figure 2] This is a plan view illustrating the configuration of the main components. [Figure 3]This is a perspective view showing the configuration of the top surface of the battery case. [Figure 4] This is a cross-sectional view taken at the line IV-IV in Figure 3, showing the relationship between the seat support frame and the floor panel. [Figure 5] This is a cross-sectional view at the VV line position in Figure 3, showing the relationship between the seat support frame and the cross member. [Figure 6] This is a modified example, a plan view showing how the width of the top surface is changed using a sheet support frame. [Figure 7] This is a perspective view showing the configuration near the side sill. [Figure 8] This is a perspective view showing the configuration of the main parts of the vehicle body structure according to the second embodiment. [Modes for carrying out the invention]

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate. The same reference numerals will be used for identical components, and redundant descriptions will be omitted. In the description, the same numbers will be used for identical elements, and redundant descriptions will be omitted. Furthermore, when describing direction, the description will be based on the front, rear, left, right, up, and down directions as seen from the driver of the vehicle. Note that the vehicle width direction and the left-right direction are synonymous.

[0010] Figure 1 shows the body structure used in the vehicle 1 of the first embodiment. The body frame 2 that constitutes the lower part of vehicle 1 has a pair of side sills 3, 3 that extend in the longitudinal direction of the vehicle from both the left and right sides of the dash panel 2a, which is mainly located in front of the passenger compartment. The body frame 2 also has a cross member 4 that extends along the width direction of the vehicle and connects the side sills 3, 3, and a rear cross member 5.

[0011] The battery case 10 is attached to the vehicle frame 2. The battery case 10 has a recessed housing portion 11 for housing the battery and a flat battery cover 12 that covers the housing portion 11 from above. In this embodiment, the battery cover 12 constitutes the floor panel of the vehicle body. And, on the upper surface 13 of the battery cover 12, a cross member 4 having a hat-shaped cross section is disposed at an intermediate position in the vehicle front-rear direction. Further, on the upper surface 13 of the battery cover 12, a rear cross member 5 is disposed at a predetermined interval in the vehicle front-rear direction from the cross member 4.

[0012] Among these, the cross member 4 has cross member ridge line portions 4c, 4c extending in the vehicle width direction between the upper surface 4a and the side walls (see FIG. 2). As shown in FIG. 3, each of the cross member ridge line portions 4c is continuously formed linearly over a range extending from the left end portion to the right end portion in the vehicle width direction without bending in the vertical direction.

[0013] Furthermore, on the upper surface 13 of the battery cover 12, a plurality of seat support frames 6 for supporting the seat 40 (see FIG. 2) of the vehicle 1 are disposed. The seat support frame 6 has an inner support frame 7 provided in a pair near the center in the vehicle width direction and a pair of outer support frames 8 provided near the left and right side edges of the battery cover 12 in the vehicle width direction, respectively.

[0014] And, the inner support frame 7 and the outer support frame 8 on the right side of the vehicle form a set to support the seat 40 of the right front seat. Also, the inner support frame 7 and the outer support frame 8 on the left side of the vehicle form another set to support the seat 40 of the left front seat. A seat slide rail 41 is provided at the lower part of each seat 40 to enable the seat sitting surface portion to slide in the vehicle front-rear direction. And, the total lengths of the inner support frame 7 and the outer support frame 8 of the first embodiment are set to be substantially the same as the total length of the seat slide rail 41.

[0015] As shown in FIG. 2, the inner support frames 7 are provided in a pair side by side at the center in the vehicle width direction. Each inner support frame 7 has a first frame portion 7a extending forward in the vehicle from the cross member 4 and a second frame portion 7b extending rearward in the vehicle. Further, the inner support frame 7 of the first embodiment has a connecting frame portion 7h that connects between the first frame portion 7a and the second frame portion 7b, and is integrally and continuously formed in the vehicle front-rear direction.

[0016] As shown in FIG. 4, the inner support frame 7 is formed in a substantially hat-shaped cross section, and is formed with a larger vertical dimension than the cross member 4. The inner support frame 7 is provided so as to straddle the cross member 4 from above, and joins the flange portions respectively formed on the left and right in the vehicle width direction of the first frame portion 7a and the second frame portion 7b to the upper surface 13 of the battery cover 12. Also, the connecting frame portion 7h of the inner support frame 7 engages the concave portion on the lower surface side with the cross member 4 from above, and joins the flange portions located on the left and right to the upper surface 4a and the front and rear side walls of the cross member 4. (See FIG. 5) Thereby, the inner support frame 7 is in a state orthogonal to the cross member 4, and the frame ridge line portion 7e and the cross member ridge line portion 4c described later are separated in the vertical direction and intersect in a top view. The first frame portion 7a and the second frame portion 7b extend from the cross member 4 in the vehicle front-rear direction by substantially the same length, and are respectively fixed to the battery cover 12.

[0017] Furthermore, seat mounting brackets 9, 9 are provided at the front end portion 7c of the first frame portion 7a and the rear end portion 7d of the second frame portion 7b. The seat mounting brackets 9, 9 mount the front end portion and the rear end portion of the seat slide rail 41 and support them from below respectively. Also, among the seat support frames 6, the inner support frame 7 has a frame ridge line portion 7e that extends in the vehicle body front-rear direction. The frame ridge line portion 7e is formed so as to continuously extend in the vehicle body front-rear direction without bending in the vertical direction in a range extending from the seat support point provided at the front end portion 7c on the first frame portion 7a side to the seat support point provided at the rear end portion 7d on the second frame portion 7b side in the vehicle body front-rear direction.

[0018] As shown in Figure 1, the inner support frame 7 has a front end 7c of the first frame portion 7a that is spaced apart and does not extend forward to the dash panel 2a. As a result, the front end 7c is not connected to the dash panel 2a. Similarly, the rear end 7d of the second frame portion 7b is spaced apart and does not extend to the rear cross member 5. As a result, the rear end 7d is not connected to the rear cross member 5.

[0019] Figure 6 shows a modified vehicle body structure of the first embodiment, in which the width of the upper surface of the inner support frame 7 is changed in the vehicle width direction, allowing curvature of the frame ridge in a top view. Here, the right inner support frame 7 has bulges 7f, 7f that widen in the vehicle width direction in the center. Also, the left inner support frame 7 has recesses 7g, 7g that narrow in the vehicle width direction in the center. However, the shape of the frame ridge when viewed from above is not limited to this. For example, it may be symmetrical, or it may have an asymmetrical curved shape or an uneven shape and be formed in a non-linear manner. In other words, as shown in the side view of the inner support frame 7 in Figure 5, it is sufficient that the frame edge portion 7e is formed linearly and continuously without bending in the vertical direction from the front sheet support point of the first frame portion 7a to the rear sheet support point of the second frame portion 7b.

[0020] Furthermore, the vehicle body structure of the first embodiment includes a reinforcing member 20 laid on the upper surface 13 of the battery cover 12 and extending in the vehicle width direction. The reinforcing member 20 has a hat-shaped cross-section and connects the rear ends 7d, 7d of a pair of adjacent inner support frames 7, 7 in the width direction. Furthermore, the reinforcing member 20 has flange portions located at the front and rear of the vehicle joined to the upper surface of the battery cover 12. In addition, the left and right ends of the reinforcing member 20 are connected to the rear ends 7d, 7d of a pair of adjacent inner support frames 7, 7, respectively. As a result, the seat support frames 6 that support the left and right seats 40 are connected even more firmly. The load applied from either seat 40 to the seat support frame 6 is then transmitted to the inner support frame 7 of the other adjacent seat 40 via the inner support frame 7 and reinforcing member 20, and distributed in the vehicle width direction.

[0021] Furthermore, the outer support frame 8, which is located outside the inner support frame 7 in the vehicle width direction, is positioned along the inside of the side sill 3. As shown in Figure 3, the outer support frame 8 has a first frame portion 8a and a second frame portion 8b. In the first embodiment, the first frame portion 8a and the second frame portion 8b are each made up of separate, independent members with a substantially hat-shaped cross-section, and are arranged in the front-to-back direction to form the outer support frame 8. The first frame section 8a extends forward from the cross member 4 and is laid on and joined to the upper surface 13 of the battery cover 12. Furthermore, the second frame section 8b extends from the cross member 4 toward the rear of the vehicle and is laid on and joined to the upper surface 13 of the battery cover 12.

[0022] Furthermore, seat mounting brackets 9, 9 are provided at the front end 8c of the first frame section 8a and the rear end 8d of the second frame section 8b, respectively, to which the front end and rear end of the seat slide rail 41 are attached and supported from below. Furthermore, the outer support frame 8 is joined vertically to the upper surfaces 4a of the left and right ends of the cross member 4, with the rear end 8f of the first frame portion 8a and the front end 8g of the second frame portion 8b being joined vertically.

[0023] Furthermore, the outer support frame 8 shown in Figure 3 has a front end 8c of the first frame section 8a that is spaced apart and does not extend forward to the dash panel 2a shown in Figure 1. The front end 8c is not connected to the dash panel 2a. Also, the rear end 8d of the second frame section 8b is spaced apart and does not extend to the rear cross member 5. The rear end 8d is not connected to the rear cross member 5.

[0024] Furthermore, in the vehicle body structure of the first embodiment, as shown in Figure 7, a pair of left and right extension members 30 are provided projecting from the inner wall surfaces of each of the left and right side sills 3 toward the center in the width direction of the vehicle. Furthermore, the left and right side ends 4b, 4b of the cross member 4 are joined so as to overlap the extension member 30 from above. As a result, each side end 4b of the cross member 4 is connected to the vehicle body frame 2 via the extension member 30. Therefore, the loads applied to the first frame portion 7a and the second frame portion 7b of the inner support frame 7 that supports the seat 40, and the first frame portion 8a and the second frame portion 8b of the outer support frame 8, are transmitted and distributed to the side sills 3 of the vehicle body frame 2 located on the left and right sides of the vehicle, respectively, via the cross member 4 and the extension member 30.

[0025] As shown in Figure 1, the vehicle body structure of the first embodiment has a cross member 4 extending in the vehicle width direction, and a U-shaped support structure C that opens forward and backward when viewed from above, formed by two inner support frames 7 and outer support frames 8 extending in the front-rear direction below each of the left and right seats. The front and rear portions of the seat 40 are supported from below by U-shaped support structures C at the front and rear, respectively.

[0026] Furthermore, as shown in Figure 1, in the first embodiment, a pair of U-shaped support structures C, C are arranged back-to-back to form an H shape, corresponding to each seat. As a result, the cross member 4 extending in the vehicle width direction and the two inner support frames 7 and outer support frames 8 extending in the front-to-rear direction are configured to form an H-shaped support structure H when viewed from above. Therefore, each seat 40 is firmly supported from below by the H-shaped support structure H.

[0027] The load applied from the seat 40 is then transmitted to the first frame portion 7a and the second frame portion 7b of the inner support frame 7, and to the first frame portion 8a and the second frame portion 8b of the outer support frame 8. The load is then received and supported from below in a planar manner by an H-shaped support structure H, which is formed by combining U-shaped support structures C, C with the cross member 4 in between. The load of the seat 40 is transmitted to the side sills 3 located on the left and right sides of the vehicle via the cross member 4 and extension members 30, and efficiently distributed to the vehicle frame 2.

[0028] In the first embodiment of the vehicle body structure configured in this way, the position of the cross member 4 is no longer restricted by the mounting position of the seat 40, and the cross member 4 can be positioned in a location that is optimal for rigidity and strength performance. Therefore, the degree of freedom in the placement of the cross member is increased, making it easy to obtain the necessary rigidity of the vehicle frame. Thus, the rigidity and strength performance of the cross member 4 are not sacrificed due to constraints on battery size or seat 40 mounting position, and the reinforcement that was conventionally required becomes unnecessary. For this reason, the vehicle structure of the first embodiment allows for the selection of battery size while suppressing an increase in vehicle weight.

[0029] Figure 8 shows the vehicle body structure of the second embodiment of the present invention. Parts that are the same as or equivalent to those in the vehicle body structure of the first embodiment are denoted by the same reference numerals and described accordingly. The vehicle body structure of the second embodiment includes a cross member 4 extending in the width direction of the vehicle 101, and two seat support frames 17, 17 extending from the cross member 4 toward the rear of the vehicle. These cross members 4 and seat support frames 17, 17 form a U-shaped support structure C that opens to the rear when viewed from above. The seats located on both the left and right sides are supported by the U-shaped support structure C by attaching the slide rails located on the inside of each seat to the seat mounting brackets 9, 9. Of these, the front seat mounting brackets 9 are installed on top of the cross member 4. The rear seat mounting brackets 9 are installed on top of the seat support frame 17.

[0030] In the second embodiment, as shown in Figure 8, a U-shaped support structure C is formed that opens only to the rear when viewed from above. However, the configuration is not limited to this, and a U-shaped support structure C that opens only to the front when viewed from above may also be formed by providing two seat support frames 17, 17 extending forward from the cross member 4. Other configurations and effects are the same as those of the vehicle body structure in the first embodiment, so their explanation will be omitted.

[0031] As described above, the vehicle body structure of the present invention is applied to a vehicle 1 comprising a vehicle body frame 2 and a battery case 10 attached to the vehicle body frame 2. The battery case 10 has a housing section 11 for housing a battery and a battery cover 12 that covers the housing section 11 from above. On the upper surface 13 of the battery cover 12 are a cross member 4 extending along the vehicle width direction and a seat support frame 6 extending from the cross member 4 in the vehicle front-rear direction to support the seat 40 of the vehicle 1.

[0032] The vehicle body structure of the present invention, configured in this manner, provides a vehicle body structure that can firmly support the seat 40 while efficiently arranging the cross member 4. In more detail, since the cross member 4 is positioned on the top surface of the battery case 10, the installation position of the cross member 4 is not restricted by the size of the battery housed in the storage section 11. Furthermore, the seat support frame 6, which extends front to back from the cross member 4, is supported from below by the upper surface 13 of the battery cover 12. Therefore, even if the position supporting the seat 40 is spaced apart from the cross member 4 in the front-rear direction, the seat support frame 6 can distribute the load to the cross member 4 and the battery cover 12, thereby firmly supporting the seat 40.

[0033] Furthermore, the seat support frame 6 has first frame sections 7a and 8a that are connected to the cross member 4 and extend forward of the vehicle body, and second frame sections 7b and 8b that are connected to the cross member 4 and extend rearward of the vehicle body. The seat 40 is supported by the first frame sections 7a and 8a and the second frame sections 7b and 8b.

[0034] Therefore, the first frame section 7a and the second frame section 7b can support the seat 40 at positions that are separated from the cross member 4 in the vehicle's longitudinal direction. Furthermore, the first frame section 8a and the second frame section 8b can support the seat 40 at positions that are separated from the cross member 4 in the vehicle's longitudinal direction. This increases the degree of freedom in the placement of the cross member 4, allowing it to be positioned in the center of the seat 40 in the front-to-rear direction, as shown in Figure 1. As a result, the legroom S for occupants seated in the front and rear seats 40 is increased, and the floor surface can be made lower and flatter. Therefore, the seats can be firmly supported while further improving the space efficiency inside the vehicle.

[0035] Furthermore, multiple seat support frames 6 are arranged in a row in the vehicle width direction, and the rear ends 7d, 7d of adjacent pairs of inner support frames 7, 7 are connected by reinforcing members 20 that extend in the vehicle width direction. Therefore, the inner support frame 7 and reinforcing member 20 can transmit the load input from the seat 40 to the seat support frame 6 to other seat support frames 6, including the adjacent inner support frame 7, and distribute it in the vehicle width direction. This further improves the seat support rigidity.

[0036] Furthermore, as shown in Figure 1, an H-shaped support structure H is formed by a cross member 4 extending in the vehicle width direction and two seat support frames 6 extending in the front-rear direction, resulting in an H shape when viewed from above. The seat 40 is then supported by this H-shaped support structure H.

[0037] Furthermore, the H-shaped support structure H allows the seat 40 to be firmly supported even if the seat mounting point and the cross member 4 are positioned far apart front to back. Furthermore, by adopting an H-shape, the seat support frame 6 is positioned to avoid the feet of the occupant seated in the seat 40, thus not obstructing the foot space S and allowing for a low, flat floor surface.

[0038] Furthermore, as shown in Figure 1, the H-shaped support structures H are formed side by side in the vehicle width direction. Adjacent H-shaped support structures H are connected by reinforcing members 20 that extend in the vehicle width direction. Therefore, the reinforcing member 20 can transmit the load input from the seat 40 to the H-shaped support structure H to other adjacent H-shaped support structures H, distributing it in the vehicle width direction. Thus, the seat 40 is further firmly supported by the H-shaped support structures H. Furthermore, the reinforcing member 20 is positioned between the left and right seats 40. This allows for improved seat support rigidity without obstructing the occupant's legroom S.

[0039] Furthermore, a cross member 4 extending in the vehicle width direction and two inner support frames 7 and outer support frames 8 extending in the front-rear direction form a U-shaped support structure C that opens forward or backward when viewed from above. Furthermore, at least a portion of the seat 40 is supported by the U-shaped support structure C. Therefore, the U-shaped support structure C allows the seat 40 to be firmly supported even if the seat mounting points are located on the seat support frame 6, separated from the cross member 4 in the front and rear directions.

[0040] Furthermore, the U-shaped support structures C are formed in pairs on the left and right sides in the vehicle width direction, each supporting a seat 40, and adjacent pairs of U-shaped support structures C are connected by reinforcing members 20 that extend in the vehicle width direction.

[0041] As a result, the loads input to the U-shaped support structure C from the left and right seats 40 are distributed in the vehicle width direction by the reinforcing member 20. Therefore, the seats 40 can be supported even more firmly. Furthermore, as shown in Figures 1 and 2, by making the position where the seat 40 is supported a U-shaped support structure C, the seat support frame 6 and reinforcing member 20 are positioned to avoid the feet of the occupant seated in the seat 40. As a result, the floor surface can be made low and flat, without obstructing the foot space S of the occupant seated in the seat 40, and the seat support rigidity can be improved.

[0042] As shown in Figure 3, the seat support frame 6 has a frame ridge portion 7e that extends in the longitudinal direction of the vehicle body. In the longitudinal direction of the vehicle body, the frame ridge portion 7e is formed in a straight line when viewed from the side of the vehicle, and is formed continuously without bending in the vertical direction, in the range from the seat mounting bracket 9 on the first frame portion 7a side to the seat mounting bracket 9 on the second frame portion 7b side.

[0043] As a result, the frame ridge portion 7e of the sheet support frame 6 does not have any vertical bending that could cause it to break. Therefore, deflection of the sheet support frame 6 due to input from the sheet 40 is suppressed, and the sheet 40 can be supported even more firmly. Furthermore, the dimensions in the vehicle width direction on the upper surface of the seat support frame 6 may be increased or decreased as shown in the bulge 7f or recess 7g in Figure 6. In other words, in a top view, the frame ridge 7e may have a bent or curved shape.

[0044] As shown in Figure 3, the cross member 4 has a cross member ridge portion 4c that extends in the vehicle width direction. The cross member ridge portion 4c is formed in a straight line when viewed in the front-rear direction of the vehicle and is formed continuously in the vehicle width direction without bending in the vertical direction. Therefore, the cross member ridge 4c of the cross member 4 does not have any vertical bending that could trigger a break. Consequently, the deflection of the sheet support frame 6 due to input from the sheet 40 is suppressed, and the sheet 40 can be supported even more firmly.

[0045] Furthermore, of the seat support frame 6, the inner support frame 7 has a frame ridge portion 7e that extends in the longitudinal direction of the vehicle body. The frame ridge portion 7e is formed continuously in the longitudinal direction of the vehicle body, extending from the front seat support point of the first frame portion 7a to the rear seat support point of the second frame portion 7b, without bending in the vertical direction. The cross member 4 has a cross member ridge portion 4c that extends in the vehicle width direction, and the cross member ridge portion 4c is formed continuously in the vehicle width direction without bending in the vertical direction. Moreover, the frame ridge portion 7e and the cross member ridge portion 4c are separated in the vertical direction and intersect when viewed from above.

[0046] As a result, there is no vertical bending in the frame ridge 7e that could trigger a break in the range from the front sheet support point to the rear sheet support point. Therefore, deflection of the inner support frame 7 due to input from the sheet 40 is suppressed, and the sheet 40 can be firmly supported. Furthermore, since there is no vertical bending in the cross member ridge section 4c that could trigger a break, the deflection of the inner support frame 7 due to input from the sheet 40 is suppressed, and the sheet 40 can be firmly supported. Furthermore, as shown in Figure 5, the frame ridge 7e and the cross member ridge 4c intersect with vertical separation. This makes it possible to orthogonalize both the frame ridge 7e and the cross member ridge 4c without bending them, thereby enabling stronger support for the sheet 40.

[0047] Furthermore, of the seat support frames 6, the outer support frame 8 has a frame ridge portion 8e that extends in the longitudinal direction of the vehicle body. The frame ridge portion 8e is formed in the longitudinal direction of the vehicle body, extending from the seat support point on the first frame portion 8a side to the seat support point on the second frame portion 8b side. The cross member 4 has a cross member ridge portion 4c that extends in the vehicle width direction. The cross member ridge portion 4c is formed continuously in the vehicle width direction without bending in the vertical direction, and the first frame portion 8a and the second frame portion 8b are joined to the cross member 4 in the vertical direction at the point where the frame ridge portion 8e and the cross member ridge portion 4c intersect in a top view.

[0048] Therefore, even if the sheet support frame 6 is divided into front and rear sections, as shown in Figure 7 for the outer support frame 8, the desired strength can be obtained by joining the frame ridge section 8e and the cross member ridge section 4c in the vertical direction at each opposing end. Furthermore, in the first embodiment shown in Figure 7, the load applied from the seat 40 can be transmitted to the side sills 3 provided on the left and right side edges of the vehicle body frame 2 via the outer support frame 8 and the side ends 4b of the cross member 4. As a result, the load is distributed in the vehicle width direction, allowing the seat 40 to be supported even more firmly.

[0049] Furthermore, as shown in Figure 7, a pair of left and right side sills 3, 3 provided on the vehicle body frame 2 are each equipped with a pair of left and right extension members 30 to which they are fixed. The left and right side ends 4b of the cross member 4 are connected to the vehicle body frame 2 via the pair of left and right extension members 30. Therefore, the cross member 4 is connected to the vehicle body frame 2 via the extension member 30. This provides practical benefits such as being able to hold the seat 40 more firmly and ensuring the rigidity of the vehicle body.

[0050] The present invention is not limited to the embodiments described above, and various modifications are possible. The embodiments described above are illustrative examples provided to facilitate understanding of the present invention, and are not necessarily limited to those comprising all the configurations described. Furthermore, it is possible to replace parts of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add configurations from other embodiments to the configuration of one embodiment. In addition, it is possible to delete parts of the configuration of each embodiment, or to add or replace other configurations. Possible modifications to the above embodiments are, for example, as follows.

[0051] In the first embodiment, the vehicle body structure has an H-shaped support structure H formed when viewed from above, and the seat 40 is supported by the H-shaped support structure H. However, the present invention is not particularly limited thereto. For example, a U-shaped support structure C that opens to the front or rear when viewed from above may be formed on either the front or rear, and the seat 40 may be supported by one of the U-shaped support structures C. In other words, the upper surface 13 of the battery cover 12 is provided with a cross member 4 extending in the vehicle width direction and a seat support frame 6 extending from the cross member 4 in the vehicle front-rear direction to support the seat 40. Thus, the shape, number, and material of the seat support frame 6 in the vehicle body structure of the present invention are not particularly limited. [Explanation of Symbols]

[0052] 1 vehicle 2. Vehicle frame 4 Cross Members 6-seat support frame 10 Battery Cases 11. Storage Unit 12 Battery Cover 40 sheets

Claims

1. The vehicle frame and A battery case attached to the aforementioned vehicle frame, In a vehicle body structure equipped with, The aforementioned battery case is A housing section for housing the aforementioned battery, It has a battery cover that covers the aforementioned housing from above, On the upper surface of the aforementioned battery cover, A cross member extending along the width of the vehicle, A vehicle body structure characterized in that a seat support frame, which extends from the cross member in the longitudinal direction of the vehicle and supports the vehicle's seats, is installed therein.

2. The seat support frame has a first frame portion connected to the cross member and extending forward of the vehicle body, and a second frame portion connected to the cross member and extending rearward of the vehicle body. The vehicle body structure according to claim 1, characterized in that the seat is supported by the first frame portion and the second frame portion.

3. The aforementioned seat support frames are arranged in a row in the vehicle width direction, The vehicle body structure according to claim 1, characterized in that it has reinforcing members that connect adjacent seat support frames in the vehicle width direction.

4. The cross member extending in the vehicle width direction and the two seat support frames extending in the front-rear direction form an H-shaped support structure when viewed from above. The vehicle body structure according to claim 1, characterized in that the seat is supported by the H-shaped support structure.

5. The aforementioned H-shaped support structure is formed in a line in the vehicle width direction, The vehicle body structure according to claim 4, characterized in that adjacent H-shaped support structures are connected by reinforcing members extending in the vehicle width direction.

6. The cross member extending in the vehicle width direction and the two seat support frames extending in the front-rear direction form a U-shaped support structure that opens forward or backward when viewed from above. The vehicle body structure according to claim 1, characterized in that at least a portion of the seat is supported by the U-shaped support structure.

7. The aforementioned U-shaped support structure is formed in pairs on the left and right sides in the vehicle width direction, and each supports a seat, The adjacent pair of U-shaped support structures are The vehicle body structure according to claim 6, characterized in that it is connected by reinforcing members extending in the vehicle width direction.

8. The aforementioned seat support frame has a frame ridge portion that extends in the longitudinal direction of the vehicle body, The vehicle body structure according to claim 2, characterized in that the frame ridge portion is formed in a straight line when viewed from the side of the vehicle and is formed continuously without bending in the vertical direction, in the range extending from the seat support point on the first frame portion side to the seat support point on the second frame portion side in the longitudinal direction of the vehicle body.

9. The aforementioned cross member has a cross member ridge portion that extends in the vehicle width direction, The vehicle body structure according to claim 1, characterized in that the cross member ridge portion is formed in a straight line when viewed in the front-rear direction of the vehicle and is formed continuously in the vehicle width direction without bending in the vertical direction.

10. The aforementioned seat support frame has a frame ridge portion that extends in the longitudinal direction of the vehicle body, The frame ridge portion is formed continuously in the longitudinal direction of the vehicle body, extending from the front seat support point of the first frame portion to the rear seat support point of the second frame portion, without bending in the vertical direction. The aforementioned cross member has a cross member ridge portion that extends in the vehicle width direction, The aforementioned cross member ridge is formed continuously in the vehicle width direction without bending in the vertical direction. The vehicle body structure according to claim 2, characterized in that the frame ridge portion and the cross member ridge portion are separated in the vertical direction and intersect when viewed from above.

11. The aforementioned seat support frame has a frame ridge portion that extends in the longitudinal direction of the vehicle body, The frame ridge portion is formed continuously in the longitudinal direction of the vehicle body, extending from the seat support point on the first frame portion to the seat support point on the second frame portion. The aforementioned cross member has a cross member ridge portion that extends in the vehicle width direction, The aforementioned cross member ridge is formed continuously in the vehicle width direction without bending in the vertical direction. The vehicle body structure according to claim 2, characterized in that the first frame portion and the second frame portion are joined vertically to the cross member at the point where the frame ridge portion and the cross member ridge portion intersect in a top view.

12. It comprises a pair of left and right extension members fixed to the left and right vehicle body frames, The vehicle body structure according to claim 1, characterized in that the left and right side ends of the cross member are connected to the vehicle body frame via a pair of left and right extension members.

Images