Vehicle body structure

Abstract

A vehicle body structure is provided that allows for efficient configuration of crossbeams while securely supporting the seats. This includes: a vehicle body frame (2); and a battery box (10) mounted on the vehicle body frame (2). The battery box (10) has: a housing (11) for accommodating batteries; and a battery cover (12) covering the housing (11) from above. A crossbeam (4) extending along the vehicle width direction is provided on the upper surface of the battery cover (12); and a seat support frame (6) extending from the crossbeam (4) in the vehicle longitudinal direction and supporting the seats of the vehicle (1).

Description

Technical Field

[0001] This invention relates to vehicle body structure. Background Technology

[0002] In recent years, in order to gain the sincere trust of more people and to ensure the achievement of sustainable and advanced energy, research and development on lightweighting that contributes to energy efficiency has been underway. For example, it is known in the past that a structure has a pair of side members, a first crossbeam and a second crossbeam orthogonal to the pair of side members, and a recessed space surrounded by the pair of side members, the first crossbeam and the second crossbeam and for housing a battery (e.g., Patent Document 1). This design includes a cover component that seals the upper opening of the recessed space, with its upper surface flush with the vehicle floor. Additionally, a third crossbeam extending in the same direction as the first and second crossbeams is positioned on the lower surface of the cover component. Furthermore, a seat rail bracket is provided above the first and third crossbeams for seat mounting. Existing technical documents Patent documents

[0003] Patent Document 1: Japanese Patent Application Publication No. 2015-223925 Summary of the Invention

[0004] However, in this technology concerning lightweighting, the challenge lies in efficiently configuring the crossbeams while firmly supporting the seat. However, in conventional technology, crossbeams (first crossbeam, third crossbeam) are arranged within the recessed space to house the battery. Therefore, the crossbeams need to be positioned to match the size of the battery. In addition, since the seat bracket is mounted on the crossbeam, a crossbeam configuration corresponding to the seat position is also required.

[0005] Furthermore, crossbeams contribute to the strength and rigidity of the vehicle body. Therefore, to meet these performance requirements, they need to be positioned in more efficient locations. Therefore, due to limitations imposed by battery size and seat mounting location, it is impossible to position the crossbeam in the optimal location for rigidity and strength. This presents a problem requiring reinforcement and resulting in increased weight, leaving room for further improvement. This application addresses the aforementioned issues by providing a vehicle body structure that efficiently configures crossbeams while securely supporting the seats. Furthermore, it contributes to energy efficiency.

[0006] To address the aforementioned issues, the vehicle body structure of the present invention includes: a vehicle body frame; and a battery box mounted on the vehicle body frame. The vehicle body structure is characterized in that the battery box has: a receiving portion for accommodating a battery; and a battery cover covering the receiving portion from above. On the upper surface of the battery cover, a crossbeam extending along the vehicle width direction is provided; and a seat support frame extending from the crossbeam in the vehicle longitudinal direction and supporting the vehicle's seats. Invention Effects

[0007] According to the present invention, a vehicle body structure is provided that can securely support the seat while efficiently configuring the crossbeams. Attached Figure Description

[0008] Figure 1 This is a top view of the vehicle body structure according to the first embodiment of the present invention, with the seats removed, viewed from above as the lower part of the vehicle. Figure 2 It is a top view illustrating the composition of the main parts. Figure 3 It is a three-dimensional diagram showing the structure of the upper surface of the battery box. Figure 4 This indicates the relationship between the seat support frame and the floor panel. Figure 3 A cross-sectional view at the position of the IV-IV line. Figure 5 This indicates the relationship between the seat support frame and the crossbeam. Figure 3 A cross-sectional view at the position of the V-V line. Figure 6 This is a top view of a modified example where the width of the upper surface portion is changed by the seat support frame. Figure 7 It is a three-dimensional diagram showing the structure near the lower longitudinal beam. Figure 8 This is a perspective view showing the main components of the vehicle body structure according to the second embodiment. Explanation of reference numerals in the attached figures 1 vehicle 2. Body frame 4. Crossbeam 6. Seat support frame 10 Battery Box 11. Reception Department 12 Battery Cover 40 seats Detailed Implementation

[0009] Hereinafter, embodiments of the present invention will be described with appropriate reference to the accompanying drawings. The same reference numerals are used to denote the same constituent elements, and repeated descriptions are omitted. Furthermore, when describing directions, the descriptions are based on the perspective of the vehicle driver: front, rear, left, right, up, and down. It should be noted that the vehicle width direction and the left-right direction have the same meaning.

[0010] Figure 1 This indicates the body structure of the vehicle 1 used in the first embodiment. The lower body frame 2 of the vehicle 1 has a pair of lower longitudinal beams 3, 3 extending mainly from the left and right sides of the dashboard 2a located at the front of the passenger compartment in the longitudinal direction of the vehicle. In addition, the body frame 2 has a crossbeam 4 extending in the width direction and connecting the lower longitudinal beams 3, 3, and a rear crossbeam 5.

[0011] A battery box 10 is installed on the vehicle frame 2. The battery box 10 has a concave receiving portion 11 for accommodating a battery and a flat battery cover 12 that covers the receiving portion 11 from above. In this embodiment, the battery cover 12 constitutes the floor panel of the vehicle body. Furthermore, a hat-shaped crossbeam 4 is disposed on the upper surface 13 of the battery cover 12 at the middle position in the longitudinal direction of the vehicle. In addition, a rear crossbeam 5 is disposed on the upper surface 13 of the battery cover 12 at predetermined intervals from the crossbeam 4 in the longitudinal direction of the vehicle.

[0012] Among them, the crossbeam 4 has a crossbeam ridge portion 4c, 4c (refer to) extending in the vehicle width direction between the upper surface 4a and the side wall. Figure 2 ). like Figure 3 As shown, each crossbeam edge portion 4c is formed continuously in a straight line without bending in the vertical direction from the left end to the right end along the vehicle width direction.

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

[0014] Furthermore, the inner support frame 7 and the outer support frame 8 on the right side of the vehicle form a set to support the right front seat 40. Alternatively, the inner support frame 7 and the outer support frame 8 on the left side of the vehicle form another set to support the left front seat 40. Each seat 40 has a seat rail 41 at its lower part, allowing the seat surface to slide in the forward and backward direction of the vehicle. Furthermore, in the first embodiment, the total length of the inner support frame 7 and the outer support frame 8 is set to be almost the same as the total length of the seat rail 41.

[0015] like Figure 2 As shown, a pair of inner support frames 7 are arranged side by side in the center of the vehicle width direction. Each inner support frame 7 has a first frame portion 7a extending from the crossbeam 4 toward the front of the vehicle and a second frame portion 7b extending toward the rear of the vehicle. In addition, the inner support frame 7 of the first embodiment has a connecting frame portion 7h that connects the first frame portion 7a and the second frame portion 7b, which is integrally and continuously formed in the vehicle front-rear direction.

[0016] like Figure 4 As shown, the inner support frame 7 is formed with a roughly hat-shaped cross section, and its vertical dimension is larger than that of the crossbeam 4. Furthermore, the inner support frame 7 is arranged to cross the crossbeam 4 from above, and the flanges formed on the left and right sides in the vehicle width direction of the first frame portion 7a and the second frame portion 7b respectively are joined to the upper surface 13 of the battery cover 12. Furthermore, the connecting frame portion 7h of the inner support frame 7 engages with the crossbeam 4 above the concave portion on the lower surface side, and joins the left and right flange portions with the upper surface 4a of the crossbeam 4 and the front and rear side walls (see reference). Figure 5 ). Thus, the inner support frame 7 becomes orthogonal to the crossbeam 4, and the frame edge portion 7e and the crossbeam edge portion 4c, described later, are separated in the vertical direction and intersect when viewed from above. Furthermore, the first frame portion 7a and the second frame portion 7b extend from the crossbeam 4 in the front-rear direction of the vehicle with almost the same length and are respectively fixed to the battery cover 12.

[0017] Furthermore, seat mounting brackets 9 and 9 are provided at the front end 7c of the first frame portion 7a and the rear end 7d of the second frame portion 7b. The seat mounting brackets 9 and 9 are for mounting the front and rear ends of the seat slide rail 41 and are supported from below. Furthermore, the inner support frame 7 in the seat support frame 6 has a frame ridge portion 7e extending in the longitudinal direction of the vehicle body. The frame ridge portion 7e is formed such that, in the longitudinal direction of the vehicle body, it extends continuously in the longitudinal direction of the vehicle body without bending in the vertical direction from the seat support point at the front end 7c provided on the side of the first frame portion 7a to the seat support point at the rear end 7d provided on the side of the second frame portion 7b.

[0018] And, as Figure 1As shown, in the inner support frame 7, the front end 7c of the first frame portion 7a is separated from the instrument panel 2a by extending forward without reaching it. Therefore, the front end 7c is not connected to the instrument panel 2a. Similarly, the rear end 7d of the second frame portion 7b is separated from the rear crossbeam 5 by extending forward without reaching it. Therefore, the rear end 7d is not connected to the rear crossbeam 5.

[0019] Figure 6 In the modified vehicle body structure of the first embodiment, the width of the upper surface portion of the inner support frame 7 is changed in the vehicle width direction, and bending of the frame edge portion is allowed when viewed from above. Here, a bulge 7f, 7f extending in the vehicle width direction is formed in the center of the inner support frame 7 on the right side. Additionally, a recess 7g, 7g narrowing in the vehicle width direction is formed in the center of the inner support frame 7 on the left side. However, the shape of the frame edge portion viewed from above is not particularly limited to this. For example, it can be bilaterally symmetrical, or it can have asymmetrical curved or concave-convex shapes and be formed in a non-linear form. In other words, as long as Figure 5 As shown in the side view, the inner support frame 7 has a frame ridge 7e that is formed continuously in a straight line without bending in the vertical direction from the front seat support point of the first frame 7a to the rear seat support point of the second frame 7b.

[0020] In addition, the vehicle body structure of the first embodiment has a reinforcing member 20 that is laid on the upper surface 13 of the battery cover 12 and extends in the vehicle width direction. The reinforcing member 20 is in the shape of a hat in cross section, and connects the rear ends 7d and 7d of a pair of adjacent inner support frames 7, 7 along the width direction. Furthermore, the reinforcing member 20 engages the flanges located at the front and rear of the vehicle with the upper surface of the battery cover 12. In addition, the reinforcing member 20 connects each of its left and right ends to the rear ends 7d, 7d of a pair of adjacent inner support frames 7, 7. Thus, the seat support frames 6 supporting the left and right seats 40 are further securely connected. Furthermore, the load input from either seat 40 to the seat support frame 6 is transmitted via the inner support frame 7 and the reinforcing member 20 to the inner support frame 7 of the adjacent seat 40 and distributed in the vehicle width direction.

[0021] In addition, the outer support frame 8, which is located on the outside compared to the inner support frame 7 in the vehicle width direction, is arranged along the inner side of the lower longitudinal beam 3. like Figure 3As shown, 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 composed of independent individual components with a generally hat-shaped cross-section, which are arranged in the front-back direction to form the outer support frame 8. The first frame section 8a extends from the crossbeam 4 toward the front of the vehicle, is laid on the upper surface 13 of the battery cover 12 and joined thereto. Additionally, the second frame portion 8b extends from the crossbeam 4 toward the rear of the vehicle, is laid on and joined to the upper surface 13 of the battery cover 12.

[0022] Furthermore, seat mounting brackets 9 and 9 are provided at the front end 8c of the first frame portion 8a and the rear end 8d of the second frame portion 8b, respectively, for mounting the front end and the rear end of the seat slide rail 41 and for being supported from below. Furthermore, in the outer support frame 8, the rear end 8f of the first frame part 8a and the front end 8g of the second frame part 8b are respectively joined in the vertical direction to the upper surface 4a of the left and right ends of the crossbeam 4.

[0023] in addition, Figure 3 In the outer support frame 8 shown, the front end portion 8c of the first frame portion 8a does not reach... Figure 1 The instrument panel 2a shown extends forward from the instrument panel 2a and is separate from it. The front end 8c is not connected to the instrument panel 2a. Furthermore, the rear end 8d of the second frame portion 8b extends without reaching the rear crossbeam 5 and is separate from it. The rear end 8d is not connected to the rear crossbeam 5.

[0024] Moreover, in the vehicle body structure of the first embodiment, such as Figure 7 As shown, a pair of protruding parts 30 are respectively provided on the inner wall of each pair of lower longitudinal beams 3 facing the center in the vehicle width direction. Furthermore, the left and right side ends 4b of the crossbeam 4 are joined by covering the top of the protruding member 30. Thus, each side end 4b on the left and right sides of the crossbeam 4 is connected to the vehicle frame 2 via the protruding member 30. Therefore, the loads applied to the first frame portion 7a and the second frame portion 7b of the inner support frame 7 supporting the seat 40, and the first frame portion 8a and the second frame portion 8b of the outer support frame 8 are distributed via the crossbeam 4 and the protruding member 30 to the lower longitudinal beam 3 of the body frame 2 located on the left and right sides of the vehicle.

[0025] like Figure 1As shown, the vehicle body structure of the first embodiment forms a U-shaped support structure C that opens forward and backward when viewed from above, through a crossbeam 4 extending in the vehicle width direction, two inner support frames 7 extending in the front-rear direction below each of the left and right seats, and an outer support frame 8. Furthermore, the front and rear parts of the seat 40 are supported from below by the front and rear U-shaped support structures C.

[0026] In addition, such as Figure 1 As shown, in the first embodiment, the U-shaped support structures C, C', are arranged back-to-back in an H-shape, corresponding to each seat. This configuration results in an H-shaped support structure H where the crossbeam 4 extending in the vehicle width direction, the two inner support frames 7 extending in the front-rear direction, and the outer support frame 8 are H-shaped when viewed from above. Therefore, the seats 40 are securely supported from below by the H-shaped support structures H.

[0027] Furthermore, the load applied from the seat 40 is transmitted to the first frame portion 7a and the second frame portion 7b of the inner support frame 7, and the first frame portion 8a and the second frame portion 8b of the outer support frame 8. Furthermore, the load is supported from below in a planar manner by the H-shaped support structure H, which is composed of the U-shaped support structure C and the crossbeam 4 sandwiched between them. The load of the seat 40 is transmitted to the lower longitudinal beams 3 located on the left and right sides of the vehicle via the crossbeam 4 and the extended component 30, and is efficiently distributed to the vehicle body frame 2.

[0028] The vehicle body structure of this first embodiment does not restrict the placement of the crossbeam 4 due to the installation position of the seat 40, and can place the crossbeam 4 in the position with optimal rigidity and strength performance. Therefore, the flexibility in the placement of the crossbeams is increased, making it easier to achieve the required rigidity of the vehicle frame. Consequently, the rigidity and strength of the crossbeams 4 are not sacrificed due to limitations in battery size and seat 40 mounting position, eliminating the need for conventional reinforcement. Therefore, the vehicle body structure of the first embodiment allows for the selection of battery size while minimizing increases in vehicle weight.

[0029] Figure 8 This indicates the vehicle body structure according to the second embodiment of the present invention. It should be noted that parts that are the same as or equivalent to the vehicle body structure of the first embodiment are described using the same reference numerals. The vehicle body structure of the second embodiment has a crossbeam 4 extending along the width direction of the vehicle 101, and two seat support frames 17, 17 extending from the crossbeam 4 toward the rear of the vehicle. Furthermore, these crossbeams 4 and seat support frames 17, 17 form a U-shaped support structure C that opens rearward when viewed from above. The seats on the left and right sides are configured such that they are supported by the U-shaped support structure C by mounting slide rails located on their respective inner sides to seat mounting brackets 9, 9. The front seat mounting brackets 9 are mounted on the crossbeam 4. The rear seat mounting brackets 9 are mounted on the seat support frame 17.

[0030] It should be noted that, in the second embodiment, as Figure 8 As shown, a U-shaped support structure C is formed, which opens only to the rear when viewed from above. However, it is not particularly limited to this and can also be configured to have two seat support frames 17, 17 extending from the crossbeam 4 to the front of the vehicle, thereby forming a U-shaped support structure C that opens only to the front when viewed from above. The other components and effects are the same as those of the vehicle body structure in the first embodiment, so the description is omitted.

[0031] As described above, the vehicle body structure of the present invention can be applied to a vehicle 1 having a vehicle body frame 2 and a battery box 10 mounted on the vehicle body frame 2. The battery box 10 has a housing portion 11 for accommodating a battery and a battery cover 12 covering the housing portion 11 from above. On the upper surface 13 of the battery cover 12, there is a crossbeam 4 extending along the vehicle width direction and a seat support frame 6 extending from the crossbeam 4 in the vehicle longitudinal direction and supporting the seat 40 of the vehicle 1.

[0032] The vehicle body structure of the present invention, as thus constructed, provides a body structure that can securely support the seat 40 while efficiently configuring the crossbeam 4. Specifically, the crossbeam 4 is positioned on the upper surface of the battery box 10, so the position of the crossbeam 4 is not limited by the size of the battery housed in the housing 11. In addition, the seat support frame 6, which extends from the crossbeam 4 forward and backward, is supported from below by the upper surface 13 of the battery cover 12. Therefore, even if the position of the supporting seat 40 is separated from the crossbeam 4 in the front-rear direction, the seat support frame 6 can still distribute the load to the crossbeam 4 and the battery cover 12, and firmly support the seat 40.

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

[0034] Therefore, the first frame portion 7a and the second frame portion 7b are able to support the seat 40 at positions that are respectively away from the crossbeam 4 in the vehicle's front-rear direction. In addition, the first frame portion 8a and the second frame portion 8b are capable of supporting the seat 40 at positions that are respectively away from the crossbeam 4 in the vehicle's front-rear direction. Therefore, the degree of freedom in the configuration of beam 4 increases, such as... Figure 1 As shown, it can be positioned at the center of the seat 40 in the fore-aft direction. This increases the legroom S for occupants seated on the seat 40, further reducing the flatness of the ground. Therefore, it can further improve the space efficiency inside the vehicle while firmly supporting the seat.

[0035] In addition, multiple seat support frames 6 are arranged side by side along the vehicle width direction, and the rear ends 7d, 7d of an adjacent pair of inner support frames 7, 7 are connected to each other by reinforcing members 20 extending along the vehicle width direction. Therefore, the inner support frame 7 and the reinforcing member 20 can transfer 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. Thus, the seat support rigidity can be further improved.

[0036] Moreover, such as Figure 1 As shown, an H-shaped support structure H is formed by a crossbeam 4 extending along the vehicle width direction and two seat support frames 6 extending along the front-rear direction, which are H-shaped when viewed from above. The seat 40 is supported by this H-shaped support structure H.

[0037] Furthermore, even with the seat mounting point and crossbeam 4 positioned apart front and rear by means of the H-type support structure H, the seat 40 can still be firmly supported. In addition, by setting it to an H-shape, the seat support frame 6 is positioned to avoid the legs of the occupant sitting on the seat 40, thereby not obstructing the leg space S, and lowering the ground and forming a flat surface.

[0038] In addition, such as Figure 1 As shown, the H-shaped support structures H are arranged in the vehicle width direction. Furthermore, adjacent H-shaped support structures H are connected by reinforcing members 20 extending in the vehicle width direction. Therefore, the reinforcing member 20 can transfer the load input from the seat 40 to the H-type support structure H to other adjacent H-type support structures H and distribute it along the vehicle width direction. Therefore, the seat 40 can be further firmly supported by the H-type support structures H. In addition, the reinforcing member 20 is disposed between the left and right seats 40. Therefore, the seat support rigidity can be improved without obstructing the occupant's legroom.

[0039] Furthermore, a U-shaped support structure C, which opens forward or backward when viewed from above, is formed by the crossbeam 4 extending along the width of the vehicle, the two inner support frames 7 extending along the front-rear direction, and the outer support frame 8. Furthermore, at least a portion of the seat 40 is supported by the U-shaped support structure C. Thus, even if the seat mounting point is located on the seat support frame 6 away from the crossbeam 4 due to the U-shaped support structure C, the seat 40 can be firmly supported.

[0040] In addition, the U-shaped support structure C is arranged in a pair along the vehicle width direction to support the seat 40, and the adjacent pair of U-shaped support structures C are connected by a reinforcing member 20 extending along the vehicle width direction.

[0041] Therefore, the loads input from the left and right seats 40 to the U-shaped support structure C are distributed by the reinforcing member 20 along the vehicle width direction. Thus, the seats 40 can be further firmly supported. In addition, such as Figure 1 as well as Figure 2 As shown, the position where the seat 40 is supported is configured as a U-shaped support structure C. Therefore, the seat support frame 6 and the reinforcing member 20 are positioned to avoid obstructing the legs of the occupant sitting on the seat 40. This allows for a lower and flatter ground surface, does not obstruct the legroom S of the occupant sitting on the seat 40, and improves the rigidity of the seat support.

[0042] And, as Figure 3 As shown, the seat support frame 6 has a frame ridge portion 7e extending 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, within 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] Therefore, the frame ridge portion 7e of the seat support frame 6 does not have bending in the vertical direction, which could cause bending. Thus, the deflection of the seat support frame 6 caused by input from the seat 40 is suppressed, and the seat 40 can be further firmly supported. It should be noted that the dimension in the vehicle width direction of the upper surface of the seat support frame 6 can be as follows: Figure 6 The bulge portion 7f or the recess portion 7g are added or removed as shown. That is to say, when viewed from above, the frame edge portion 7e can be bent or curved.

[0044] like Figure 3 As shown, the crossbeam 4 has a crossbeam ridge portion 4c extending along the vehicle width direction. The crossbeam ridge portion 4c is formed in a straight line when viewed in the front-rear direction of the vehicle and is continuously formed in the vehicle width direction without bending in the vertical direction. Therefore, the crossbeam edge portion 4c of the crossbeam 4 does not have bending in the vertical direction that would cause bending. Thus, the deflection of the seat support frame 6 caused by input from the seat 40 is suppressed, and the seat 40 can be further firmly supported.

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

[0046] Therefore, on the frame ridge portion 7e, there is no bending in the vertical direction that could cause bending, within the range from the front seat support point to the rear seat support point. Thus, the deflection of the inner support frame 7 caused by input from the seat 40 is suppressed, and the seat 40 is securely supported. Furthermore, since there is no bending in the vertical direction on the crossbeam ridge 4c that could cause bending, the deflection of the inner support frame 7 caused by input from the seat 40 is suppressed, and the seat 40 is firmly supported. Moreover, such as Figure 5 As shown, the frame edge portion 7e and the crossbeam edge portion 4c are separated vertically and intersect. Therefore, the edges of the frame edge portion 7e and the crossbeam edge portion 4c can be made orthogonal without bending, which can more firmly support the seat 40.

[0047] In addition, the outer support frame 8 in the seat support frame 6 has a frame ridge 8e that extends in the front-rear direction of the vehicle body. The frame ridge portion 8e is formed in the longitudinal direction of the vehicle body within the range from the seat support point on the side of the first frame portion 8a to the seat support point on the side of the second frame portion 8b. The crossbeam 4 has a crossbeam ridge portion 4c extending in the vehicle width direction. Furthermore, the crossbeam ridge portion 4c is formed continuously in the vehicle width direction without bending in the vertical direction. At the intersection of the frame ridge portion 8e and the crossbeam ridge portion 4c when viewed from above, the first frame portion 8a and the second frame portion 8b are joined to the crossbeam 4 in the vertical direction.

[0048] Therefore, even if the seat support frame 6 is as Figure 7 The outer support frame 8 is divided into front and back sections as shown. At each opposite end, the frame edge portion 8e and the crossbeam edge portion 4c are joined in the vertical direction, thereby achieving the desired strength. and, Figure 7In the first embodiment shown, the load applied from the seat 40 can be transferred via the outer support frame 8 and the side end 4b of the crossbeam 4 to the lower longitudinal beam 3 located on the left and right side edges of the vehicle frame 2. Therefore, the load is distributed along the vehicle width direction, which can further firmly support the seat 40.

[0049] In addition, such as Figure 7 As shown, the left and right lower longitudinal beams 3, 3, provided on the left and right sides of the vehicle frame 2 each have a pair of fixed protruding parts 30. The left and right side ends 4b of the crossbeam 4 are connected to the vehicle frame 2 via the pair of protruding parts 30. Therefore, the crossbeam 4 is connected to the body frame 2 via the protruding member 30. This provides practical benefits such as more securely holding the seat 40 and ensuring the rigidity of the body.

[0050] This invention is not limited to the embodiments described above, and various modifications are possible. The embodiments described above are illustrative for ease of understanding and are not intended to be limited to all the described configurations. Furthermore, a portion of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Additionally, a portion of the configuration of each embodiment can be deleted, or other configurations can be added or replaced. Modifications possible with respect to the above embodiments are as follows.

[0051] The vehicle body structure of the first embodiment is configured such that an H-shaped support structure H is formed when viewed from above, and the H-shaped support structure H supports the seat 40. However, the present invention is not particularly limited to this. For example, it may also be configured such that a U-shaped support structure C, which opens forward or backward when viewed from above, is formed on either the front or rear, and the seat 40 is supported by one U-shaped support structure C. In other words, it is sufficient to provide a crossbeam 4 extending along the vehicle width direction and a seat support frame 6 extending from the crossbeam 4 in the vehicle's longitudinal direction and supporting the seat 40 on the upper surface 13 of the battery cover 12. 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.

Claims

1. A vehicle body structure, comprising: Body frame; and Battery box mounted on the vehicle frame The vehicle body structure is characterized by the following features: The battery box has the following features: A housing portion for accommodating the battery; and A battery cover that covers the housing from above. The upper surface of the battery cover is provided with: A crossbeam extending along the width of the vehicle; and A seat support frame that extends from the crossbeam in the longitudinal direction of the vehicle and supports the vehicle's seats.

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

3. The vehicle body structure according to claim 1, characterized in that, Multiple seat support frames are arranged side-by-side in the vehicle width direction. Furthermore, the vehicle body structure has reinforcing members that connect adjacent seat support frames to each other in the vehicle width direction.

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

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

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

7. The vehicle body structure according to claim 6, characterized in that, The U-shaped support structure is arranged along the width of the vehicle to form a pair on the left and right, which respectively support the seats. Furthermore, adjacent pairs of the aforementioned U-shaped support structures are connected by reinforcing members extending along the vehicle width direction.

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

9. The vehicle body structure according to claim 1, characterized in that, The crossbeam has a crossbeam ridge extending along the vehicle width direction. The crossbeam ridge is formed in a straight line when viewed from the front and rear directions of the vehicle and is formed continuously in the width direction of the vehicle without bending in the vertical direction.

10. The vehicle body structure according to claim 2, characterized in that, The seat support frame has a frame ridge extending along the front-rear direction of the vehicle body. The frame ridge is formed continuously without bending in the vertical direction, within the range from the front seat support point of the first frame to the rear seat support point of the second frame, in the longitudinal direction of the vehicle body. The crossbeam has a crossbeam ridge extending along the vehicle width direction. The crossbeam's edge is formed continuously in the vehicle width direction without bending in the vertical direction. The frame edge portion and the crossbeam edge portion are separated in the vertical direction, and intersect when viewed from above.

11. The vehicle body structure according to claim 2, characterized in that, The seat support frame has a frame ridge extending along the front-rear direction of the vehicle body. The frame ridge is continuously formed in the longitudinal direction of the vehicle body, from the seat support point on the first frame side to the seat support point on the second frame side. The crossbeam has a crossbeam ridge extending along the vehicle width direction. The crossbeam's edge is formed continuously in the vehicle width direction without bending in the vertical direction. At the point where the frame edge and the crossbeam edge intersect when viewed from above, the first frame portion and the second frame portion are joined to the crossbeam in the vertical direction.

12. The vehicle body structure according to claim 1, characterized in that, It has a pair of protruding parts that are fixed to the left and right pairs of the vehicle body frames respectively. The left and right ends of the crossbeam are connected to the vehicle frame via a pair of protruding parts.

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