JP2023051654A - Vehicle body structure - Google Patents

Abstract

To provide a vehicle body structure which enables improvement of vehicle body rigidity while improving habitability in a passenger compartment.SOLUTION: A battery housing part which houses a battery and a battery non-housing part 202 which houses no battery are provided side by side in a vehicle anteroposterior direction below a passenger compartment. A second frame part 18 disposed at the battery non-housing part 202 expands its width in a vehicle width direction compared to a first frame part disposed at the battery housing part.SELECTED DRAWING: Figure 8

Description

TECHNICAL FIELD The present disclosure relates to a vehicle body structure provided in an automobile.

For example, as disclosed in Japanese Unexamined Patent Application Publication No. 2002-100001, an electric vehicle may have a battery mounted below a floor panel for supplying electric power to a driving motor. In Patent Document 1, a lower frame is provided on the lower portion of the vehicle body. The lower frame includes a front cross member extending in the vehicle width direction at the front portion of the vehicle body, a center member extending rearward of the vehicle from the center portion of the front cross member in the vehicle width direction, and extending rearward of the vehicle from both ends of the front cross member in the vehicle width direction. It has a pair of left and right extending rockers. The battery is housed in a space surrounded by the front cross member, rocker, and center member.

JP 2011-240762 A

By the way, when the lower frame and the battery are arranged all over the bottom of the floor panel as in Patent Document 1, the height of the floor panel is increased by the lower frame and the battery. , there is a concern that the comfort of the passenger compartment deteriorates. In response to this, it is conceivable to increase the overall height of the vehicle, but there are cases where it is not possible to adopt the method of increasing the overall height due to problems with the design of the vehicle and the fact that the overall height affects the parking lot. be.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to provide a vehicle body structure capable of improving the rigidity of the vehicle body while improving the comfortability of the vehicle interior.

In order to achieve the above object, the first aspect of the present disclosure can be based on a vehicle body structure provided in an electric vehicle having a traction motor. The vehicle body structure includes a battery unit disposed below the vehicle compartment and having a battery frame extending in the longitudinal direction of the vehicle and a battery for supplying electric power to the driving motor. A battery containing portion for containing the battery and a non-battery containing portion for not containing the battery are provided below the vehicle compartment so as to be aligned in the longitudinal direction of the vehicle. The battery frame has a first frame portion arranged in the battery accommodating portion and a second frame portion arranged in the battery non-accommodating portion, and the second frame portion includes the first frame. It is widened in the vehicle width direction compared to the part.

With this configuration, it is possible to lower the floor panel at the portion corresponding to the battery non-accommodating portion. This improves the comfort of the passenger compartment. On the other hand, the fact that the battery is not accommodated in the battery non-accommodating portion may reduce the rigidity of the vehicle body in that portion. In contrast, in this configuration, not only is the battery frame extending in the vehicle front-rear direction disposed below the vehicle compartment, but the second frame portion disposed in the non-battery housing portion is disposed in the battery housing portion. Since it is wider than the provided first frame portion and has high strength, it is possible to increase the vehicle body rigidity of the battery non-accommodating portion.

In the second aspect of the present disclosure, the battery housing portion includes a front battery housing portion provided in front of the non-battery housing portion of the vehicle and a rear battery housing portion provided behind the non-battery housing portion of the vehicle. contains. The first frame portion includes a front first frame portion arranged in the front battery housing portion and a rear first frame portion arranged in the rear battery housing portion.

According to this configuration, it is possible to increase the number of batteries to be loaded by accommodating the batteries in the front battery accommodation section and the rear battery accommodation section, respectively. The habitability can be improved by using the battery non-accommodating portion located in the middle.

In a third aspect of the present disclosure, the first frame portion and the second frame portion are hollow. A first harness extending in the vehicle front-rear direction is arranged below the first frame portion and the second frame portion.

According to this configuration, the space below the first frame portion and the second frame portion can be used as a space for arranging the first harness.

In a fourth aspect of the present disclosure, a second harness for busbars connecting the battery housed in the front battery housing section and the battery housed in the rear battery housing section is provided on the second frame section. It is arranged so as to be aligned with the first harness below in the vehicle width direction.

According to this configuration, since the second harness for the bus bar connects the front battery and the rear battery, it is arranged so as to extend in the front-rear direction through below the second frame portion. will be By arranging the second harness for the busbar and the first harness in the width direction of the vehicle, the space under the widened second frame portion is prevented from adversely affecting the comfort by shortening the dimension in the vertical direction. can be effectively used to arrange both harnesses.

According to a fifth aspect of the present disclosure, a depression portion that is depressed downward is formed in a portion of the floor panel corresponding to the non-battery accommodating portion.

According to this configuration, by forming the recessed portion in the floor panel, the height of the recessed portion is reduced. As a result, for example, the passenger's foot space is widened, and comfortability is improved.

In a sixth aspect of the present disclosure, a center frame is disposed upwardly away from a floor panel in the vehicle width direction central portion of the passenger space and extends in the vehicle front-rear direction, an upper portion is fixed to the center frame, and a lower portion is A connection member fixed to a portion of the floor panel corresponding to the second frame portion is further provided.

According to this configuration, the center frame can be strongly connected by connecting the center frame to the second frame portion having a higher strength than the first frame portion.

As described above, the battery accommodating portion and the battery non-accommodating portion are provided below the vehicle compartment, and the second frame portion arranged in the battery non-accommodating portion is replaced with the first frame portion arranged in the battery accommodating portion. Since the width is increased in the vehicle width direction compared to the conventional model, it is possible to improve the rigidity of the vehicle body while improving the comfortability of the vehicle interior.

1 is a side view of an automobile having a vehicle body structure according to an embodiment of the present invention; FIG. 1 is a perspective view showing a state in which an automobile is divided into an upper structure and a lower structure; FIG. It is the perspective view which looked at a part of vehicle body structure from upper direction. FIG. 2 is a plan view of part of the vehicle body structure; FIG. 5 is a cross-sectional view taken along line VV in FIG. 4; FIG. 4 is a perspective view showing part of the lower structure with the cover member removed; FIG. 7 is a cross-sectional view taken along the line AA in FIG. 6; FIG. 7 is a cross-sectional view taken along the line BB in FIG. 6;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. It should be noted that the following description of preferred embodiments is essentially merely illustrative, and is not intended to limit the invention, its applications, or its uses.

FIG. 1 is a left side view of an automobile 1 having a vehicle body structure A according to an embodiment of the present invention. In the description of this embodiment, the vehicle front-rear direction is simply referred to as the "front-rear direction," the vehicle front side is simply referred to as the "front side," and the vehicle "rear side" is simply referred to as the rear. In addition, the vehicle width direction is the left-right direction of the vehicle, and the left side of the vehicle is simply referred to as the "left side", and the right side of the vehicle is simply referred to as the "right side".

(Overall structure of automobile)
The automobile 1 is a passenger automobile, and an occupant space R1 for an occupant to ride in is provided in an intermediate portion in the front-rear direction of the automobile 1 . The passenger space R1 is provided with front seats (front seats) FS and rear seats RS. The front seat FS includes a driver's seat located on the right (or left) side of the passenger space R1 and a front passenger's seat located on the left (or right) side of the passenger space R1. Rear seats RS are also arranged on the right and left sides of the passenger space R1, respectively. Although not shown, a third row seat may be arranged behind the rear seat RS. Also, the rear seat RS is not essential and may be omitted.

A front door FD and a rear door RD are provided on the left and right sides of the passenger space R1, respectively. In the case of the automobile 1 without the rear seat RS, the rear door RD can be omitted.

A front space R2 is provided in front of the passenger space R1 of the automobile 1. - 特許庁A power train PT can be mounted in this front space R2 as required. When the power train PT is mounted in the front space R2, the front space R2 can also be called a power train storage room, a motor room, an engine room, or the like. A bonnet hood BF is provided above the front space R2.

Behind the passenger space R1 of the automobile 1, there is provided a cargo room space R3 in which luggage and the like can be accommodated. The trunk space R3 can be opened and closed by the trunk lid TR. A rear space R4 is provided behind the passenger space R1 of the automobile 1 and below the cargo room space R3. A power train PT that generates power for the automobile 1 can be mounted in the rear space R4 as required. When the power train PT is mounted in the rear space R4, the rear space R4 can also be called a power train storage room, a motor room, an engine room, or the like.

The power train PT may be mounted in both the front space R2 and the rear space R4, or may be mounted in only one of them. When the powertrain PT is installed only in the front space R2, the powertrain PT drives only the front wheels FT, and the powertrain PT is installed only in the rear space R4. It becomes a rear-wheel drive vehicle in which only the rear wheels RT are driven by the power train PT. Further, when the power train PT is mounted in both the front space R2 and the rear space R4 to drive the front wheels FT and the rear wheels RT, the vehicle becomes a four-wheel drive vehicle.

The power train PT includes at least a traveling motor M (shown in FIG. 2) for driving the drive wheels, and if necessary, a speed reducer, a transmission, and the like. Therefore, the automobile 1 is an electric vehicle. The traveling motor M is arranged such that its center of rotation extends in the left-right direction. The power train PT may include, for example, a controller and the like in addition to the traveling motor M. Powertrain PT may include an internal combustion engine. A battery unit Y (also shown in FIG. 1) for supplying electric power to the running motor M is mounted on the lower portion of the automobile 1 . For example, the power generated by the internal combustion engine may be used to charge the battery unit Y, or the power generated by the internal combustion engine may drive at least one of the front wheels FT and the rear wheels RT.

The type of automobile 1 may not be a four-door vehicle as shown in FIG. 1 as an example, but may be, for example, an automobile without rear doors RD. Moreover, although not shown, the present invention can also be applied to a vehicle such as a hatchback vehicle in which the rear space R4 can be opened and closed with a tailgate.

As shown in FIG. 2, the automobile 1 includes a lower structure 2 and an upper structure 3, and the lower structure 2 and the upper structure 3 constitute a vehicle body structure A. As shown in FIG. In FIG. 2, doors FD, RD, bonnet hood BF, fenders, window glass, roof, center pillar, rear pillar, bumpers, front and rear lighting devices, instrument panel, front and rear seats, etc., which the upper structure 3 originally has. is removed. FIG. 2 also shows a state in which the front wheels FT, the rear wheels RT, the suspension device, and the like, which are originally included in the lower structure 2, are removed.

The lower structure 2 has a battery unit Y. As shown in FIG. The battery unit Y has a front battery FB, a rear battery RB, and a frame 10 surrounding the front battery FB and the rear battery RB. The lower structure 2 also includes a front support frame 20 extending forward from the front portion of the frame 10 and a rear support frame 30 extending rearward from the rear portion of the frame 10 .

Although not shown, in the case of a general electric vehicle, the battery unit is often detachable under the floor as a separate body from the vehicle body. , and the front support frame 20 and the rear support frame 30 are integrated with the frame-shaped frame 10 surrounding the RB, and the front support frame 20 and the rear support frame 30 are detachable from the upper structure 3 together with the batteries FB and RB. It's becoming

Specifically, the automobile 1 of this embodiment is configured to be vertically divisible into a lower structure 2 having batteries FB and RB and an upper structure 3 forming a passenger space R1 and a luggage space R3. . Being vertically divisible means integrating the lower structure 2 with the upper structure 3 using fastening members such as bolts, nuts, and screws without using welding, adhesion, or the like. As a result, the lower structure 2 can be separated from the upper structure 3 as necessary when maintenance or repair is performed after the automobile 1 has been handed over to the user, thereby improving maintainability.

Here, a ladder frame type body structure is known as a body structure of an automobile. In the case of the ladder frame type car body structure, the ladder frame and the cabin can be divided vertically, but since the ladder frame extends continuously in the front-rear direction, receive the impact load. In the event of a side collision, the rudder frame only receives the impact load in a supplementary manner, and it is the cabin that primarily receives the impact load. As described above, in the ladder frame type vehicle body structure, it is common that the members that receive the collision load at the time of the frontal collision, the rear collision, and the side collision are separated.

On the other hand, in the case of the automobile 1 of this embodiment, the lower structure 2 having the front support frame 20 and the rear support frame 30 and the upper structure 3 are separable. and in both cases of a side collision, the impact load is received by the lower structure 2 and the upper structure 3, so that the impact load can be dispersed and absorbed by both structures 2 and 3. Its technical concept is very different from the conventional ladder frame type car body structure. The structures of the lower structure 2 and the upper structure 3 will be described in order below.

(lower structure)
First, the lower structure 2 will be described. The lower structure 2 includes batteries FB, RB, a frame form frame 10, a front support frame 20 and a rear support frame 30, as well as a power train PT, front wheels FT, rear wheels RT, and a front suspension shown in phantom lines in FIG. Devices SP1, SP2 and rear suspension devices SP3, SP4 are also provided. The types of the front suspension devices SP1 and SP2 and the rear suspension devices SP3 and SP4 are not particularly limited, and it is possible to change the vehicle body structure according to the types of the front suspension devices SP1 and SP2 and the rear suspension devices SP3 and SP4. .

As shown in FIG. 2, the frame-shaped frame 10 serving as the skeleton of the battery unit Y is a member for surrounding and protecting the front battery FB, the rear battery RB, harnesses, and the like. Below the passenger space side floor panel 41, which will be described later, the frame type frame 10 extends from the vicinity of the left end portion of the passenger space side floor panel 41 to the vicinity of the right end portion of the passenger space side floor panel 41, and also extends from the vicinity of the front end portion to the rear end of the passenger space side floor panel 41. It is formed large so as to extend to the vicinity of the part. By providing the frame 10 over a wide area below the floor panel 41 on the passenger space side in this way, it becomes possible to mount large-capacity batteries FB and RB on the automobile 1 . Batteries FB and RB may be, for example, lithium-ion batteries, all-solid-state batteries, or other secondary batteries. Also, the batteries FB and RB may be so-called battery cells, or may be battery packs containing a plurality of battery cells.

The frame type frame 10 includes a left side member 11, a right side member 12, a front side member 13, and a rear side member 14. - 特許庁The left side member 11, the right side member 12, the front side member 13, and the rear side member 14 are made of, for example, aluminum alloy extruded materials, but they may also be made of aluminum alloy plate materials or steel plate press-formed materials. may have been In the following description, the term "extruded material" means an extruded material made of aluminum alloy, and the term "press-formed material" means a press-formed material of an aluminum alloy plate or steel plate. Also, each member may be made of, for example, casting or die casting.

Each of the left side member 11, the right side member 12, the front side member 13, and the rear side member 14 has a rectangular cross-sectional shape in a direction orthogonal to the longitudinal direction. The left side member 11, the right side member 12, the front side member 13 and the rear side member 14 are all arranged at the same height and extend substantially horizontally. When connecting the lower structure 2 to the upper structure 3, the front member 13 is fastened and fixed to the lower portion of the dash panel 50 with a fastening member, and the left side member 11 and the right side member 12 are attached to the left and right side sills 60. Each is fastened and fixed with a fastening member. Also, the rear member 14 is fastened and fixed to a connection panel 43, which will be described later, with a fastening member.

The left side member 11 is provided at the left end of the lower structure 2 and extends in the front-rear direction. The right side member 12 is provided at the right end of the lower structure 2 and extends in the front-rear direction. The left side member 11 and the right side member 12 are arranged inside the left and right side sills 60 described later in the vehicle width direction. 5 and the like, the front member 13 is provided in the front portion of the battery unit Y and extends in the left-right direction from the front end of the left side member 11 to the front end of the right side member 12. As shown in FIG. The left end of the front member 13 and the front end of the left side member 11 are connected, and the right end of the front member 13 and the front end of the right side member 12 are connected. The rear member 14 is provided at the rear portion of the battery unit Y and extends in the left-right direction from the rear end portion of the left side member 11 to the rear end portion of the right side member 12 . The left end portion of the rear member 14 and the rear end portion of the left side member 11 are connected, and the right end portion of the rear member 14 and the rear end portion of the right side member 12 are connected.

A cover member 15 serving as a bottom plate is attached to the lower portion of the frame 10 . The frame 10 is closed from below by a cover member 15 . The cover member 15 extends substantially horizontally and is fixed to the lower surfaces of the left side member 11, the right side member 12, the front side member 13 and the rear side member 14, and is also fixed to the side sill 60 as will be described later. . The upper portion of the frame 10 may be closed with a lid (not shown) or with a passenger space side floor panel 41, which will be described later. The electric power of the batteries FB and RB housed in the frame 10 is supplied to the motor M for traveling via a traveling control circuit (not shown). Furthermore, the batteries FB and RB can be charged via charging sockets (not shown).

As shown in FIG. 6, the front portion inside the frame 10 is a front battery housing portion 200 for housing the front battery FB, and the rear portion inside the frame 10 is a rear battery. A rear battery housing portion 201 in which the RB is housed is provided. A portion between the front battery housing portion 200 and the rear battery housing portion 201 is a portion that does not contain a battery. That is, the front battery housing portion 200, the non-battery housing portion 202, and the rear battery housing portion 201 are arranged side by side in the front-rear direction. One of the front battery housing portion 200 and the rear battery housing portion 201 may be omitted.

FIG. 5 shows a cross section of the central portion of the vehicle body structure A in the left-right direction. As shown in FIG. 5, inside the frame 10, first to third battery side cross members 10A, 10B, 10C made of hollow members are provided as reinforcing members extending in the left-right direction. The heights of the first to third battery side cross members 10A, 10B, and 10C are all the same, and are the same as the heights of the front side member 13 and the rear side member . The first to third battery-side cross members 10A, 10B, 10C may be made of an extruded material, or may be made of a press-formed material. In this embodiment, three battery-side cross members 10A, 10B, and 10C are provided, but the number of battery-side cross members 10A, 10B, and 10C is increased or decreased according to the longitudinal dimension of the frame 10. be able to.

The first to third battery-side cross members 10A, 10B, and 10C are spaced apart from each other in the longitudinal direction, with the first battery-side cross member 10A being the foremost and the third battery-side cross member 10A being the foremost. Member 10C is positioned at the rearmost. A lower portion of each of the battery-side cross members 10A, 10B, and 10C is fixed to the upper surface of the cover member 15. As shown in FIG. The left ends of the battery side cross members 10A, 10B and 10C are fixed to the inner surface (right side surface) of the left side member 11, and the right ends of the battery side cross members 10A, 10B and 10C are fixed to the right side member 12. is fixed to the inner surface (left side) of the That is, the battery-side cross members 10A, 10B, and 10C are members that connect the left side member 11 and the right side member 12 together.

A front center member 16 and first to third rear center members 17 to 19 are provided inside the frame 10 as hollow reinforcing members extending in the front-rear direction. The front center member 16 and the first to third rear center members 17 to 19 can also be called a battery frame extending in the front-rear direction. It has a structure having a battery frame composed of central members 17 to 19 and the like. The battery frame may include a left side member 11 , a right side member 12 , a front side member 13 and a rear side member 14 .

The front center member 16 and the first to third rear center members 17 to 19 are arranged at substantially the same height and provided in the center of the frame 10 in the left-right direction. Lower ends of the front center member 16 and the first to third rear center members 17 to 19 are attached to the upper surface of the cover member 15 . A front central member 16 and first to third rear central members 17 to 19 extend from the front member 13 to the rear member 14 .

The front central member 16 is a front first frame portion arranged in the front battery housing portion 200, and is arranged between the front member 13 and the first battery side cross member 10A. A front end portion of the front center member 16 is fixed to a left-right center portion of the front member 13, and a rear end portion of the front center member 16 is fixed to a left-right center portion of the first battery side cross member 10A. Therefore, the front member 13 is a member extending so as to connect the front end portions of the left side member 1 and the right side member 12 and the front end portion of the front central member 16 .

The first rear central member 17 is a front first frame portion disposed in the front battery housing portion 200 behind the front central member 16, and is composed of the first battery side cross member 10A and the second battery side cross member 10B. is placed between. The front end portion of the first rear center member 17 is fixed to the left-right center portion of the first battery side cross member 10A, and the rear end portion of the first rear center member 17 is fixed to the left-right center portion of the second battery side cross member 10B. Fixed.

The second rear central member 18 is a second frame portion disposed in the battery non-accommodating portion 202 behind the first rear central member 17, and is composed of the second battery side cross member 10B and the third battery side cross member 10C. is placed between. The front end portion of the second rear center member 18 is fixed to the left-right center portion of the second battery side cross member 10B, and the rear end portion of the second rear center member 18 is fixed to the left-right center portion of the third battery side cross member 10C. Fixed.

The third rear central member 19 is a rear first frame portion disposed in the rear battery housing portion 201 behind the second rear central member 18, and is formed by the third battery side cross member 10C and the rear member 14. is placed between. The front end of the third rear center member 19 is fixed to the center of the third battery side cross member 10C in the left-right direction, and the rear end of the third rear center member 19 is fixed to the center of the rear member 14 in the left-right direction. there is

Therefore, the first to third battery side cross members 10A, 10B, 10C, the front center member 16 and the first to third rear center members 17 to 19 are arranged in a grid pattern inside the frame 10. Since they are connected to each other, the reinforcing effect of the frame form 10 and, in turn, the reinforcing effect of the lower structure 2 are further enhanced.

Assuming an imaginary straight line extending in the front-rear direction in plan view, the front center member 16 and the first to third rear center members 17-19 are positioned in the left-right direction so as to be arranged on the imaginary straight line. is set. In other words, the first to third rear central members 17 to 19 are provided so as to be positioned on an imaginary extension line rearward of the front central member 16 .

7 is a cross-sectional view taken along the line AA of FIG. 6, showing a cross-section corresponding to the front battery housing portion 200. FIG. A front battery FB is accommodated on both left and right sides of the first rear central member 17 provided in the frame 10 . A first harness 204 extending in the front-rear direction is arranged below the first rear central member 17 . The first harness 204 extends from the front portion to the rear portion of the frame 10, and therefore passes under the front central member 16 and the first to third rear central members 17-19 so as to extend in the front-rear direction. is placed in In this embodiment, two first harnesses 204 are arranged side by side in the vehicle width direction. It may be the first harness 204 .

On the other hand, FIG. 8 is a cross-sectional view taken along line BB of FIG. A second rear center member 18 is provided in the battery non-accommodating portion 202 . The second rear center member 18 is wider in the vehicle width direction than the first rear center member 17 shown in FIG. Specifically, the dimension of the second rear central member 18 in the vehicle width direction is set longer than the dimension of the first rear central member 17 in the vehicle width direction, and the first rear central member 17 and the second rear central member 17 When the member 18 is viewed from the front-rear direction, the left end of the second rear central member 18 is arranged so as to protrude leftward from the left end of the first rear central member 17, and the right end of the second rear central member 18 is arranged. portion projects to the right from the right end portion of the first rear central member 17 . As a result, the width of the space 210 (shown in FIG. 8) immediately below the second rear central member 18 is wider than the width of the space 220 (shown in FIG. 7) immediately below the first rear central member 17 . In addition, the portion without the front battery FB and the rear battery RB may easily lose rigidity, but the wide second rear center member 18 is provided in the portion without the front battery FB and the rear battery RB. Therefore, a decrease in rigidity can be suppressed. Since the first rear central member 17 and the second rear central member 18 are arranged at the same height, the vertical dimensions of the spaces 210 and 220 are substantially the same.

A second harness 205 for a busbar is also arranged below the second rear central member 18 in addition to the first harness 204 . The second busbar harness 205 is a harness for connecting the front battery FB and the rear battery RB, and thus extends in the front-rear direction. It passes through the battery non-accommodating portion 202 . The second harness 205 is positioned on both left and right sides of the first harness 204 . Therefore, more harnesses 204 and 205 are arranged in the space 210 below the second rear central member 18 than in the space 220 below the first rear central member 17, but the width of the space 210 is is relatively wide, there is no problem even if many harnesses 204, 205 are arranged. The arrangement of the first harness 204 and the second harness 205 is not limited to the arrangement shown in the figure, and can be arranged arbitrarily.

As shown in FIG. 2 , a pair of left and right front support frames 20 are provided and connected to the front member 13 of the frame type frame 10 . The front power train PT is attached to the front support frame 20 via a mounting member (not shown). The lower structure 2 is provided with left and right drive shafts S1 for transmitting the output of the power train PT (rotational force of the driving motor M) to the left and right front wheels FT, respectively.

A pair of left and right rear support frames 30 are provided in the same manner as the front support frame 20 and are connected to the rear member 14 of the frame type frame 10 . The rear power train PT is attached to the rear support frame 30 via a mount member (not shown). The lower structure 2 is provided with left and right drive shafts S2 for transmitting the output of the power train PT (rotational force of the driving motor M) to the left and right rear wheels RT, respectively.

(upper structure)
Next, the upper structure 3 will be described. The upper structure 3 includes a floor component 40 , a dash panel 50 , and a pair of left and right side sills 60 . The floor constituent member 40 is a member arranged above the frame form frame 10 and the rear support frame 30 of the lower structure 2 . The floor structure member 40 includes a passenger space side floor panel (first floor panel) 41 forming a floor of a passenger space R1 in which a front seat FS and a rear seat RS (shown in FIG. 1) on which passengers are seated, and a cargo seat. A luggage space side floor panel (second floor panel) 42 that constitutes the floor of the room space R3, and a connection panel 43 that connects the rear portion of the passenger space side floor panel 41 and the front portion of the luggage space side floor panel 42. It has

The floor-constituting member 40 can be configured, for example, by a member obtained by pressing a steel plate or the like. The passenger space side floor panel 41, the luggage space side floor panel 42, and the connection panel 43 may be integrally formed, or may be formed separately and then connected. Further, in the present embodiment, the floor panel 41 on the passenger space side, the floor panel 42 on the cargo space side, and the connection panel 43 are divided into three parts for explanation. Also called a floor panel. Also, only the passenger space side floor panel 41 may be called a floor panel.

The passenger space side floor panel 41 extends from the front to the rear of the passenger space R1 and from the left side to the right side of the passenger space R1. The passenger space side floor panel 41 according to the present embodiment has a floor tunnel-less structure without a tunnel portion. That is, generally, a floor panel of a conventional automobile is provided with a tunnel portion that greatly bulges upward and extends in the front-rear direction. For example, this tunnel is a part for passing an exhaust pipe extending rearward from the engine mounted in the engine room at the front of the vehicle, and for passing a propeller shaft that transmits the output of the engine to the rear wheels. . Exhaust pipes and propeller shafts often have a diameter of, for example, 10 cm or more. must provide a gap of at least several centimeters. Furthermore, an insulator or the like may be arranged on the inner surface of the tunnel portion. Due to these factors, the height of the tunnel from the floor panel may be, for example, 15 cm or more or 20 cm or more. and the center of the seat cushion in the vertical direction. The tunnelless structure is such a structure that does not have a tunnel portion that protrudes greatly upward.

As described above, the passenger space side floor panel 41 does not have a tunnel portion whose height from the upper surface of the passenger space side floor panel 41 is 15 cm or more, or 20 cm or more. A low bulging portion having a height of 5 cm or less or 10 cm or less from the upper surface may be provided. In the case of such a low bulging portion, the exhaust pipe and the propeller shaft cannot be passed through it, so it does not function as a tunnel portion. Therefore, even if the floor panel 41 on the passenger space side has a low bulging portion with a height of 5 cm or less or 10 cm or less from the upper surface, the floor panel has a tunnelless structure.

In this embodiment, since the power train PT includes the traveling motor M, there is no need to mount the internal combustion engine in the front space R2, and therefore the exhaust pipe does not need to be led to the rear of the vehicle. Further, if the power train PT is mounted in the rear space R4, the power train PT can drive the rear wheels RT, and the propeller shaft can be omitted. Therefore, the passenger space side floor panel 41 can have a tunnelless structure.

As also shown in FIG. 3, the passenger space side floor panel 41 has a recessed portion 41a formed so as to bulge downward in a front-rear direction intermediate portion. Specifically, a recessed portion 41a on which a passenger's foot can be placed is formed in a portion of the passenger space side floor panel 41 corresponding to the battery non-accommodating portion 202 . The recessed portion 41a has a bottom portion 41b on which the feet of the rear seat occupant seated on the rear seat RS can be placed. The bottom portion 41b is formed substantially horizontally. The front portion of the recessed portion 41a is formed so as to gradually become deeper toward the rear side. The recessed portion 41 a can be formed continuously from the left side to the right side of the passenger space side floor panel 41 . The bottom portion 41b has substantially the same height as the lower portion of the side sill 60, which will be described later, so that the height of the bottom portion 41b can be made sufficiently low. Thereby, the passenger's living space can be expanded by using the battery non-accommodating portion 202 of the lower structure 2 .

The positional relationship between the recessed portion 41a and the seat cushion of the rear seat RS in the front-rear direction is such that when a rear seat occupant sitting in the rear seat RS puts his/her feet straight down, the feet are naturally placed on the bottom surface portion 41b. is set. The position of the front portion of the recessed portion 41a is set so that when a rear seat occupant seated in the rear seat RS moves his/her feet obliquely forward, the feet are placed on the bottom surface portion 41b. The position and longitudinal dimension of the recessed portion 41a are set so that the rear seat occupant can place his/her foot on the bottom portion 41b even if the foot is slightly moved back and forth.

A floor frame 41c extending in the front-rear direction is provided at the central portion in the left-right direction of the recessed portion 41a. The floor frame 41c is formed so as to surround the second rear central member 18 of the lower structure 2 from above and from both sides, and when the lower structure 2 and the upper structure 3 are integrated, the second rear central member 18 is formed. The member 18 is accommodated inside the floor frame 41c from below the floor frame 41c. By providing the floor frame 41c, it is possible to reinforce the portion where the recessed portion 41a is formed.

The luggage space side floor panel 42 is positioned above the passenger space side floor panel 41 . A rear space R4 is positioned below the floor panel 42 on the side of the cargo space. That is, the luggage compartment space side floor panel 42 is arranged so as to partition the luggage compartment space R3 and the rear space R4. Since the luggage space side floor panel 42 is arranged above the passenger space side floor panel 41, the connection panel 43 extends in the vertical direction. The connection panel 43 may be vertical, or may be slanted so as to be located rearward as it goes upward.

As also shown in FIG. 5, the dash panel 50 is a member that serves as a partition between the front space R2 and the passenger space R1, and extends upward from the front portion of the passenger space floor panel 41 and also extends in the left-right direction. , bordering the front of the passenger space R1.

As shown in FIG. 4 , the left and right side sills 60 are arranged at both left and right end portions of the passenger space side floor panel 41 so as to extend in the front-rear direction. A left end portion of the passenger space side floor panel 41 is connected to a vertically intermediate portion of the left side sill 60 . Since the battery unit Y including the batteries FB and RB is arranged below the passenger space side floor panel 41, the lower portion of the side sill 60 and the batteries FB and RB are arranged so as to overlap when viewed from the side of the vehicle. be done. Also, the right side sill 60 is similarly connected to the right end of the passenger space side floor panel 41 .

As shown in FIG. 3 , the upper structure 3 has a pair of left and right hinge pillars 70 . A right hinge pillar 70 extends upwardly from the front end of the right side sill 60 . Also, the left hinge pillar 70 extends upward from the front end of the left side sill 60 . Left and right front doors FD (shown in FIG. 1) are rotatably attached to the left and right hinge pillars 70, respectively. The left edge of dash panel 50 is connected to the right side surface of left hinge pillar 70 . Also, the right edge of the dash panel 50 is connected to the left side surface of the right hinge pillar 70 . Although not shown, a center pillar, a rear pillar, and the like are also provided on the upper structure 3 .

As shown in FIG. 2, on the left side of the upper structure 3 in front of the dash panel 50 is a left front wheel that supports a suspension device (front suspension device) SP1 (shown in phantom lines in FIG. 4) for the left front wheel FT. A suspension support member 51A is provided. Further, on the right side of the upper structure 3 in front of the dash panel 50, a right front wheel suspension support member 51B for supporting a suspension device (front suspension device) SP2 for the right front wheel FT (indicated by phantom lines in FIG. 4) is provided. is provided. Although the type of the suspension devices SP1 and SP2 is not particularly limited, they include, for example, suspension arms, shock absorbers, springs, and the like that support the front wheels FT in a vertically swingable manner. The ends of the suspension arms on the vehicle body side, the upper ends of the shock absorbers, and the like are attached to the front wheel suspension support members 51A and 51B. The front wheel suspension support members 51A and 51B can be made of die-cast aluminum, for example, but are not limited to this, and may be made of a combination of steel plates or the like.

As shown in FIG. 2 and the like, on the left side in front of the dash panel 50, three left fixing frames 52A for fixing the left front wheel suspension support member 51A are provided. The three left fixed frames 52A are vertically spaced from each other, and the front portions of the three left fixed frames 52A are fixed to the front wheel suspension support member 51A. On the other hand, the rear part of the left fixing frame 52A, which is arranged at the top and in the middle in the vertical direction, is fixed to the left side of the left hinge pillar 70 or the dash panel 50. As shown in FIG. Also, the rear part of the left fixed frame 52A, which is arranged at the bottom, is fixed to the left side sill 60. As shown in FIG.

As only partly shown in FIG. 3, three right fixing frames 52B for fixing the right front wheel suspension support member 51B are provided on the right side in front of the dash panel 50. As shown in FIG. The three right fixed frames 52B are arranged with a space therebetween in the vertical direction, and the front portions of the three right fixed frames 52B are fixed to the front wheel suspension support member 51B. On the other hand, the rear portion of the right fixing frame 52B, which is located at the top and in the middle in the vertical direction, is fixed to the right side of the right hinge pillar 70 or the dash panel 50. As shown in FIG. Also, the rear part of the right fixed frame 52</b>B, which is arranged at the bottom, is fixed to the right side sill 60 .

As shown in FIG. 2, a left crash can 53A extending forward is fixed to the front portion of the left front wheel suspension support member 51A. A right crash can 53B extending forward is fixed to the front portion of the right front wheel suspension support member 51B. Bumper reinforcements 140 extending in the left-right direction are attached to the front portion of the left crash can 53A and the front portion of the right crash can 53B.

As shown in FIG. 4, the upper structure 3 includes a left front frame 54A and a right front frame 54B. That is, in front of the dash panel 50 are a left front frame 54A connecting a front portion of a center frame 80 and a left front wheel suspension support member 51A, which will be described later, and a front portion of the center frame 80 and a right front wheel suspension. A right front frame 54B is provided to connect with the support member 51B. The left front frame 54A is inclined to the left as it goes forward. The right front frame 54B is inclined to the right as it goes forward.

As shown in FIG. 3, the passenger space side floor panel 41 has a front cross member 44A, an intermediate cross member 44B, a recess front cross member 44C and a recess rear cross member 44D. The front cross member 44A, the intermediate cross member 44B, the recess front cross member 44C, and the recess rear cross member 44D extend in the left-right direction and are fixed to the upper surface of the passenger space side floor panel 41. As shown in FIG. Therefore, the front cross member 44A, the intermediate cross member 44B, the recessed front cross member 44C, and the recessed rear cross member 44D are arranged so as to intersect a center frame 80, which will be described later, in plan view in the passenger space R1. .

The front cross member 44A is arranged in front of the passenger space side floor panel 41 . The front portion of the front cross member 44A is also joined to the lower portion of the dash panel 50. As shown in FIG. The intermediate cross member 44B is disposed behind the front cross member 44A and forward of the recessed portion 41a, and the intermediate cross member 44 and the passenger space side floor panel 41 form a closed cross section.

The recessed front cross member 44C is disposed behind the intermediate cross member 44B so as to extend in the left-right direction along the front portion of the recessed portion 41a. The recessed portion rear cross member 44D is disposed behind the recessed portion front cross member 44C so as to extend in the left-right direction along the rear portion of the recessed portion 41a. The recessed front cross member 44C and the passenger space side floor panel 41 form a closed section, and the recessed rear cross member 44D and the passenger space side floor panel 41 form a closed section. By providing the recess front cross member 44C and the recess rear cross member 44D, the portion where the recess 41a is formed can be reinforced. The front portion of the floor frame 41c provided inside the recess 41a is connected to the center of the recess front cross member 44C in the left-right direction, and the rear portion of the floor frame 41c is connected to the recess rear cross member 44D. It is connected to the central portion in the left-right direction.

As shown in FIG. 5 and the like, the upper structure 3 includes a center frame 80 that extends continuously in the front-rear direction from the dash panel 50 to the connection panel 43 . The center frame 80 is positioned in the center in the left-right direction. That is, in plan view, the front central member 16 and the first to third rear central members 17 to 19 and the center frame 80 overlap each other. Arrangement positions of the rear center members 17 to 19 and the center frame 80 are set.

Further, the center frame 80 is disposed above the passenger space side floor panel 41 in the central portion of the passenger space R1 in the left-right direction. A rear portion of the center frame 80 is connected to the connection panel 43 . A left front seat FS and a rear seat RS are arranged on the left side of the center frame 80 , while a right front seat FS and a rear seat RS are arranged on the right side of the center frame 80 .

By arranging the center frame 80 upwardly away from the passenger space side floor panel 41, it is possible to dispose, for example, parts between the lower surface of the center frame 80 and the upper surface of the passenger space side floor panel 41. can. Also, the space between the lower surface of the center frame 80 and the upper surface of the passenger space side floor panel 41 can be used as an article storage section. As shown in FIG. 5, the center frame 80 according to this embodiment has a bending portion 80A that bends in the vertical direction at the intermediate portion in the front-rear direction. By providing the bent portion 80A in the center frame 80, for example, the rear portion can be made lower than the front portion, so that the comfort of the rear seat occupants can be improved. In addition, since the front portion of the center frame 80 can be made higher than the rear portion, it is possible to place articles, for example, below the front portion of the center frame 80 . The bent portion 80A is formed at a portion closer to the front than the central portion of the center frame 80 in the front-rear direction.

Specifically, the center frame 80 includes a front frame member 81 extending in the front-rear direction, a rear frame member 82 disposed behind the front frame member 81 and extending rearward, and a rear portion and a rear portion of the front frame member 81 . It has a cylindrical connecting member 83 that connects with the front portion of the side frame member 82 . The front frame member 81 and the rear frame member 82 are hollow, that is, have a tubular shape extending in the front-rear direction, and can be made of, for example, an extruded material. By making the front frame member 81 and the rear frame member 82 hollow, they become lightweight and highly rigid members. The vertical cross section of the front frame member 81 and the rear frame member 82 along the vehicle width direction is rectangular. and a lower wall portion, and left and right side wall portions extending in the vertical direction. The cross-sectional shape of the front frame member 81 and the rear frame member 82 is not limited to a rectangular shape, and may be a polygon with pentagons or more, a circle, or an ellipse.

The longitudinal dimension of the rear frame member 82 is set longer than the longitudinal dimension of the front frame member 81 . Therefore, the connecting portion between the front frame member 81 and the rear frame member 82 is located forward of the central portion of the passenger space R1 in the front-rear direction. Note that the center frame 80 is not limited to a two-part structure consisting of the front frame member 81 and the rear frame member 82, and may be made up of one member from the front part to the rear part, or may have a three-part structure. There may be.

The front frame member 81 is inclined at a first inclination angle with respect to the horizontal plane and extends linearly. On the other hand, the rear frame member 82 is inclined with respect to the horizontal plane at a second inclination angle smaller than the first inclination angle and extends linearly. That is, since the rear frame member 82 is inclined at a different inclination angle than the front frame member 81, the bent portion 80A is bent downward at the connecting portion between the front frame member 81 and the rear frame member 82. is configured. In this embodiment, the rear frame member 82 is arranged so as to slope downward toward the rear side. The front frame member 81 and the rear frame member 82 may have the same inclination angle. In this case, the bent portion 80A is not formed.

In addition, as shown in FIG. 4, the center frame 80 has a left frame component 84A and a right frame component 84B that constitute the front portion of the center frame 80, thereby forming a shape branched in the left and right direction. It has become. The left frame component 84A and the right frame component 84B are spaced apart from each other in the left-right direction. The rear portion of the left frame component member 84A is fixed to the left side surface of the front-rear direction intermediate portion of the front frame member 81 . The left frame component member 84A is inclined in a plan view so as to be positioned to the left as it goes forward from the portion fixed to the front frame member 81 toward the front side. A front portion of the left frame component member 84A is connected to a portion of the dash panel 50 which is spaced upward from the passenger space side floor panel 41 . The rear portion of the left front frame 54A is connected to the front portion of the left frame component 84A.

Also, the rear portion of the right frame component 84B is fixed to the right side surface of the front frame member 81 at the middle portion in the front-rear direction. The right frame component member 84B is inclined in a plan view so as to be positioned to the right as it goes forward from the portion fixed to the front frame member 81 toward the front side. A front portion of the right frame component member 84B is connected to a portion of the dash panel 50 which is spaced upward from the passenger space side floor panel 41 . The rear portion of the right front frame 54B (shown in FIG. 4) is connected to the front portion of the right frame component 84B.

The upper structure 3 includes first to third connecting members 101-103. The first to third connecting members 101 to 103 are members that extend upward from the passenger space side floor panel 41, have their upper portions fixed to the center frame 80, and connect the center frame 80 to the passenger space side floor panel 41. . The first connecting member 101 is disposed foremost in the passenger space R1, and the first connecting member 101 is separated from the dash panel 50 rearward. The lower portion of the first connecting member 101 is fixed to a portion of the passenger space side floor panel 41 rearwardly away from the dash panel 50, and the upper portion of the first connecting member 101 is rearwardly separated from the dash panel 50 of the center frame 80. fixed to the part.

In addition, as shown in FIG. 3 and the like, the second connecting member 102 is arranged rearward away from the first connecting member 101 . A lower portion of the first connecting member 101 and a lower portion of the second connecting member 102 are fixed to portions of the passenger space side floor panel 41 separated from each other in the front-rear direction. In addition, the upper portion of the first connecting member 101 and the upper portion of the second connecting member 102 are fixed to portions separated from each other in the front-rear direction of the center frame 80 .

As shown in FIG. 3, the first connecting member 101 has a left member (left connecting member) 101A and a right member (right connecting member) 101B. The lower portions of the left member 101A and right member 101B are fixed to the front cross member 44A. The left member 101A extends upward from the front cross member 44A so as to be positioned leftward as viewed from the front. The upper portion of the left member 101A is fixed to the front portion of the left frame component member 84A of the center frame 80. As shown in FIG.

Further, the right member 101B extends upward from the front cross member 44A so as to be positioned rightward as viewed from the front. The upper portion of the right member 101b is fixed to the front portion of the right frame component member 84B of the center frame 80. As shown in FIG. In addition, since the front portion of the left frame component 84A and the front portion of the right frame component 84B are separated in the left-right direction, most of the left member 101A and the right member 101B, except for the lower portions, extend in the left-right direction. The distance between the left member 101A and the right member 101B in the left-right direction increases upward.

A lower portion of the second connecting member 102 is fixed to the intermediate cross member 44B. The upper portion of the second connecting member 102 is fixed to the bent portion 80A of the center frame 80. As shown in FIG. Therefore, the second connecting member 102 extends from the bent portion 80A of the center frame 80 toward the passenger space side floor panel 41 .

A lower portion of the third connecting member 103 is fixed to the recess front cross member 44C. The recessed front cross member 44C is disposed immediately above the second rear central member 18, and the laterally central portion of the recessed front cross member 44C is fixed to the front portion of the second rear central member 18. . That is, the lower portion of the third connecting member 103 is fixed to a portion of the passenger space side floor panel 41 corresponding to the second rear central member 18 . On the other hand, the upper portion of the third connecting member 103 is fixed to the lower wall portion of the rear frame member 82 of the center frame 80 .

(Load path during collision)
Next, it is assumed that the automobile 1 has a frontal collision. When the automobile 1 undergoes a frontal collision, an impact load is input from the bumper reinforcement 140 to the left crash can 53A and the right crash can 53B. The impact loads input to the left crash can 53A and the right crash can 53B are transmitted to the left and right front wheel suspension support members 51A and 51B.

Since the left and right front wheel suspension support members 51A, 51B are connected to the dash panel 50, the center frame 80, and the front support frame 20, the impact load input to the left and right front wheel suspension support members 51A, 51B is It is transmitted to and absorbed by the panel 50, the center frame 80, and the front support frame 20. Furthermore, since the left and right front wheel suspension support members 51A and 51B are also connected to the left and right side sills 60 and 60, the impact loads input to the left and right front wheel suspension support members 51A and 51B are 60 is also transmitted and absorbed.

The left front frame 54A connects the front portion of the center frame 80 and the left front wheel suspension support member 51A, and the right front frame 54B connects the front portion of the center frame 80 and the right front wheel suspension support member 51B. Therefore, the impact load is also input to the center frame 80 and absorbed.

Furthermore, since the rear portion of the front support frame 20 is connected to the frame 10 of the battery unit Y, the impact load input to the front support frame 20 is also transmitted to the frame 10 and absorbed. . At this time, the frame type frame 10 includes not only the left side member 11 and the right side member 12 extending in the longitudinal direction, but also the front central member 16 and the first to third rear central members 17 to 19 extending in the longitudinal direction. Therefore, these members 11, 12, 16-19 can also absorb the impact load. Further, inside the recessed portion 41a of the passenger space side floor panel 41, a floor frame 41c is provided so as to extend in the longitudinal direction like the front center member 16 and the first to third rear center members 17-19. Therefore, the impact load can be absorbed also by the floor frame 41c. Since a plurality of load paths are provided in this way, it is possible to secure the passenger space R1 at the time of collision.

(Action and effect of the embodiment)
As described above, according to this embodiment, since the battery non-accommodating portion 202 is located below the passenger space side floor panel 41, the passenger space side floor panel 41 is lowered at the portion corresponding to the battery non-accommodating portion 202. , the legroom of the rear seat occupants can be expanded. This improves the comfort of the passenger compartment.

The fact that no battery is accommodated in the battery non-accommodating portion 202 may reduce the rigidity of the vehicle body in that portion. Not only are the third rear central members 17 to 19 arranged below the passenger space side floor panel 41, but also the second rear central member 18 arranged in the battery non-accommodating section 202 is arranged in the battery accommodating sections 200 and 201. Since it is wider than the front center member 16 and the third rear center member 19 and has high strength, the rigidity of the non-battery storage portion 202 can also be increased.

In addition, by housing the batteries FB and RB in the front battery housing portion 200 and the rear battery housing portion 201, respectively, the amount of batteries to be loaded can be increased. In this case, the front battery housing portion 200 and the rear battery housing portion 201 can be used to improve comfortability.

Furthermore, by arranging the first harness 204 and the second harness 205 side by side in the vehicle width direction under the widened second rear central member 18, the vertical dimension is shortened and the comfort is not adversely affected. Both harnesses 204 and 205 can be arranged together while doing so.

The above-described embodiments are merely examples in all respects and should not be construed in a restrictive manner. Furthermore, all modifications and changes within the equivalent range of claims are within the scope of the present invention.

As described above, the vehicle body structure according to the present invention can be used, for example, in electric vehicles and other automobiles.

1 Automobile 10 Frame type frame 16 Front central member (first front frame part)
17 1st rear center member (front side 1st frame part)
18 Second rear center member (second frame part)
19 Third rear central member (rear first frame part)
41 passenger space side floor panel 80 center frame 103 third connecting member 200 front battery housing portion 201 rear battery housing portion 202 non-battery housing portion 204 first harness 205 second harness FB, RB battery M running motor

Claims (6)

In a vehicle body structure provided in an electric vehicle having a running motor,
a battery unit disposed below a vehicle compartment and having a battery frame extending in the longitudinal direction of the vehicle; and a battery for supplying power to the driving motor;
A battery housing portion for housing the battery and a non-battery housing portion for not housing the battery are provided below the vehicle compartment so as to be aligned in the longitudinal direction of the vehicle,
The battery frame has a first frame portion arranged in the battery accommodating portion and a second frame portion arranged in the battery non-accommodating portion,
The vehicle body structure, wherein the second frame portion is wider in the vehicle width direction than the first frame portion. In the vehicle body structure according to claim 1,
The battery housing portion includes a front battery housing portion provided in front of the non-battery housing portion of the vehicle, and a rear battery housing portion provided behind the non-battery housing portion of the vehicle,
The first frame portion includes a front first frame portion arranged in the front battery housing portion and a rear first frame portion arranged in the rear battery housing portion. In the vehicle body structure according to claim 2,
The first frame portion and the second frame portion are hollow,
A vehicle body structure in which a first harness extending in a vehicle front-rear direction is disposed below the first frame portion and the second frame portion. In the vehicle body structure according to claim 3,
A second harness for a bus bar connecting the battery housed in the front battery housing portion and the battery housed in the rear battery housing portion is located below the second frame portion and extends along the width of the vehicle. The car body structure is arranged so as to line up in the direction. In the vehicle body structure according to any one of claims 1 to 4,
The vehicle body structure, wherein a portion of the floor panel corresponding to the battery non-accommodating portion is formed with a recess that is recessed downward. In the vehicle body structure according to any one of claims 1 to 5,
a center frame disposed upwardly away from the floor panel in the center portion of the passenger space in the vehicle width direction and extending in the vehicle front-rear direction;
and a connecting member having an upper portion fixed to the center frame and a lower portion fixed to a portion of the floor panel corresponding to the second frame portion.

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