JP2021160520A - Vehicle lower part structure - Google Patents

Abstract

To arrange a battery control unit compactly in a vehicle fore and aft direction and inhibit reduction of a battery capacity and a vehicle cabin space.SOLUTION: A vehicle lower part structure includes: first and second battery units 32 which are disposed below a floor panel 10 spaced apart from each other at both sides of a propeller shaft in a vehicle width direction; a fuel tank 20 which is disposed below the floor panel 10 at the vehicle rear side relative to the first and second battery units 32 and at a level higher than the first and second battery units 32; and a battery control unit 44 formed in a flat shape. The battery control unit 44 is disposed adjacent to the vehicle front side of the fuel tank 20 at the vehicle rear side of the first and second battery units 32 so that a length as seen in a vehicle fore and aft direction becomes smaller than a height as seen in a vertical direction.SELECTED DRAWING: Figure 10

Description

The present invention relates to a vehicle substructure.

The engine and drive motor as a drive source are arranged on the front side of the vehicle, the propeller shaft is arranged below the floor panel forming the floor surface of the vehicle interior, and the power from at least one of the engine and the drive motor is supplied by the propeller shaft to the rear of the vehicle. A hybrid vehicle that transmits to drive wheels arranged on the side is known.

Further, in the hybrid vehicle, a plurality of battery modules for storing electric power supplied to a drive motor are connected to form a unit as a battery unit, and the battery units are arranged below the floor panel on both sides of the propeller shaft in the vehicle width direction. Is also known (see, for example, Patent Document 1).

Japanese Patent No. 5843293

In a hybrid vehicle in which the first and second battery units are arranged on both sides of the propeller shaft in the vehicle width direction below the floor panel, the fuel tank for storing the fuel supplied to the engine arranged on the front side of the vehicle is under the rear seat. May be placed below the kick-up portion of the floor panel. Further, the battery control unit formed in a flat shape may be arranged in the vicinity of the first and second battery units below the floor panel.

When the fuel tank is arranged below the kick-up portion of the floor panel on the rear side of the vehicle of the first and second battery units, and the battery control unit is arranged near the first and second battery units below the floor panel. It is desired that the battery control unit be compactly arranged in the front-rear direction of the vehicle in the limited space below the floor panel.

When the battery control unit is arranged horizontally above the first and second battery units, the battery control unit reduces the size of the first and second battery units to reduce the battery capacity in an attempt to secure a passenger compartment space. Can cause a drop. On the other hand, when trying to secure the battery capacity, the floor panel may be formed so as to project upward by the battery control unit, which may cause a decrease in the vehicle interior space.

Therefore, according to the present invention, in a vehicle in which the first and second battery units are arranged on both sides of the propeller shaft in the vehicle width direction below the floor panel, the battery capacity and the vehicle are compactly arranged in the vehicle front-rear direction. An object of the present invention is to provide a vehicle substructure capable of suppressing a decrease in interior space.

In order to solve the above problems, the inventors of the present application have described the vehicles in which the first and second battery units are arranged on both sides of the propeller shaft in the vehicle width direction below the floor panel, and the vehicles of the first and second battery units. When the fuel tank was arranged below the kick-up portion of the floor panel on the rear side, the configuration of the battery control unit was enthusiastically examined while considering the influence on the battery capacity and the passenger compartment space. As a result, they have found a configuration capable of suppressing a decrease in battery capacity and vehicle interior space while arranging the battery control unit compactly, and have completed the present invention.

According to the present invention, a drive source having an engine and a drive motor, a floor panel forming a floor surface of a vehicle interior, and a floor panel extending below the floor panel in the front-rear direction of the vehicle to transmit power from the drive source to the drive wheels. A first battery unit and a first battery unit which is a lower structure of a vehicle provided with a propeller shaft and is arranged below the floor panel so as to be separated from each other on both sides of the propeller shaft in the vehicle width direction and stores electric power supplied to the drive motor. A second battery unit and a fuel tank arranged below the floor panel so as to be higher than the first battery unit and the second battery unit on the rear side of the vehicle and higher than the first battery unit and the second battery unit. The first battery unit and the battery control unit that controls the second battery unit, which are formed in a flat shape, are provided, and the battery control unit is the rear side of the vehicle of the first battery unit and the second battery unit. Provided is a vehicle substructure arranged adjacent to the vehicle front side of the fuel tank so that the length in the vehicle front-rear direction is smaller than the height in the vertical direction.

According to the present invention, the first and second battery units are arranged below the floor panel so as to be separated from each other on both sides of the propeller shaft in the vehicle width direction, and below the floor panel, the rear side of the vehicle from the first and second battery units. A fuel tank arranged higher than the first and second battery units and a battery control unit formed in a flat shape are provided. The battery control units are arranged on the rear side of the vehicle of the first and second battery units so that the length in the front-rear direction of the vehicle is smaller than the height in the vertical direction, that is, vertically adjacent to the front side of the fuel tank. NS.

As a result, when the fuel tank is arranged below the kick-up portion of the floor panel on the vehicle rear side of the first and second battery units, the battery control unit is arranged vertically adjacent to the vehicle front side of the fuel tank. By doing so, the battery control unit can be compactly arranged in the vehicle front-rear direction below the kick-up portion of the floor panel as compared with the case where the battery control unit is arranged horizontally.

Since the battery control unit is arranged adjacent to the vehicle front side of the fuel tank which is arranged higher than the first and second battery units on the vehicle rear side of the first and second battery units, the first and second battery units are arranged. It is possible to suppress a decrease in battery capacity and vehicle interior space as compared with the case where the batteries are arranged so as to be stacked on the upper side.

Therefore, in a vehicle in which the first and second battery units are arranged on both sides of the propeller shaft in the vehicle width direction below the floor panel, the battery capacity and the cabin space are reduced while the battery control units are compactly arranged in the vehicle front-rear direction. Can be suppressed.

The floor panel has a kick-up portion formed higher than the front portion below the rear seat in the rear portion, and a battery control unit and a fuel tank may be arranged below the kick-up portion.

With this configuration, the battery control unit and fuel tank are arranged below the kick-up part of the floor panel arranged below the rear seats, so it is possible to prevent the passenger compartment space from becoming narrow and reducing the occupant's comfort. can do.

The junction box is provided with a flattened shape, and the junction box is installed on the rear side of the vehicle of the first and second battery units so that the length in the front-rear direction of the vehicle is smaller than the height in the vertical direction, that is, the fuel is installed vertically. The tank is arranged adjacent to the front side of the vehicle, the battery control unit and the junction box are arranged apart from each other on both sides of the propeller shaft in the vehicle width direction, and the battery control unit is arranged at least a part of the junction box and the vehicle in the vehicle side view. It is preferable that the positions overlap in the front-rear direction.

With this configuration, the junction box is vertically arranged on the vehicle front side of the fuel tank on the vehicle rear side of the first and second battery units, and the battery control unit overlaps at least a part of the junction box in the vehicle front-rear direction. The battery control unit and the junction box can be compactly arranged in the front-rear direction of the vehicle.

The battery cover accommodating the first battery unit and the second battery unit connects the first battery accommodating portion, the second battery accommodating portion, the first battery accommodating portion, and the second battery accommodating portion in the vehicle width direction. The battery control unit may be located within the connection, including a connection that extends to.

According to this configuration, the battery cover includes a connecting portion that connects the first battery accommodating portion and the second battery accommodating portion and extends in the vehicle width direction, and the battery control unit is arranged in the connecting portion. The control unit can be protected.

The connecting portion is formed by combining the front cover member and the rear cover member, and the mating surfaces of the front cover member and the rear cover member are each formed so as to be inclined downward toward the vehicle rear side toward the rear side of the vehicle. Is preferable.

With this configuration, the battery control unit arranged in the connecting portion can be attached and detached by enlarging the opening of the mating surface as compared with the case where the mating surfaces of the front cover member and the rear cover member are not formed to be inclined. It can be easily performed and the work efficiency can be improved.

According to the vehicle substructure according to the present invention, in a vehicle in which the first and second battery units are arranged on both sides of the propeller shaft in the vehicle width direction below the floor panel, the battery control units are compactly arranged in the vehicle front-rear direction. At the same time, it is possible to suppress a decrease in vehicle interior space and battery capacity.

It is a schematic diagram of the vehicle body to which the lower structure of the vehicle which concerns on embodiment of this invention is applied. It is a top view of the vehicle body to which the lower structure of the vehicle which concerns on embodiment of this invention is applied. It is a bottom view of the vehicle body to which the lower structure of the vehicle which concerns on embodiment of this invention is applied. It is sectional drawing of the vehicle body along the Y4-Y4 line of FIG. It is sectional drawing of the vehicle body along the Y5-Y5 line of FIG. It is sectional drawing of the vehicle body along the Y6-Y6 line of FIG. It is sectional drawing of the vehicle body along the Y7-Y7 line of FIG. It is a perspective view of a battery pack. It is sectional drawing of the battery pack along the line Y9-Y9 of FIG. It is sectional drawing of the battery pack along the line Y10-Y10 of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic view of a vehicle body to which the vehicle substructure according to the embodiment of the present invention is applied. The vehicle according to the embodiment of the present invention has an engine and a drive motor arranged on the front side of the vehicle as a drive source, and power from at least one of the engine and the drive motor is rearward as a drive wheel arranged on the rear side of the vehicle. It is a front engine / rear drive hybrid vehicle that transmits to the wheels.

As shown in FIG. 1, the vehicle body 1 of the hybrid vehicle is between the engine 3 as the drive source 2, the automatic transmission 4 as the transmission connected to the engine 3, and the engine 3 and the automatic transmission 4. A motor (drive motor) 5 as a drive source 2 arranged in the It has a differential device 8 that transmits power from the drive source 2 to the left and right rear wheels 6.

The propeller shaft 7 extends in the front-rear direction of the vehicle below the floor panel 10 forming the floor surface of the vehicle interior. A tunnel portion 11 is provided on the center side of the floor panel 10 in the vehicle width direction. The propeller shaft 7 is arranged inside the tunnel portion 11. The front end of the propeller shaft 7 is connected to the automatic transmission 4 via a universal joint 15, and the rear end of the propeller shaft 7 is connected to the differential device 8 via a universal joint 16.

In the vehicle body 1, when an impact load acts on the drive source 2 from the front of the vehicle body at the time of a head-on collision, the impact load is input to the differential device 8 through the propeller shaft 7. When an impact load is input to the differential device 8, the support of the differential device 8 to the vehicle body 1 is released, and the front side of the differential device 8 is rotated downward with the axle 9 as a fulcrum. When the vehicle front side of the differential device 8 is rotated downward, the vehicle rear side of the propeller shaft 7 moves downward and deforms, and the drive source 2 moves rearward of the vehicle body to enhance shock absorption. There is.

The vehicle body 1 includes an exhaust pipe 17 extending from the engine 3 in the front-rear direction of the vehicle. The exhaust pipe 17 is arranged below the propeller shaft 7 below the tunnel portion 11. A catalyst device 18 provided with a catalyst for purifying the exhaust of the engine 3 as an exhaust system component is arranged on the upstream side of the exhaust pipe 17, and the exhaust of the engine 3 as an exhaust system component is brought into the atmosphere on the downstream side of the exhaust pipe 17. A silencer 19 for reducing the emitted sound is provided.

The vehicle body 1 includes a fuel tank 20 for storing fuel supplied to the engine 3 and a battery 30 for storing electric power supplied to the motor 5. The motor 5 transmits power to the rear wheels 6 and is rotationally driven by the propeller shaft 7 when the vehicle is decelerating to generate regenerative power generation, and supplies the generated power to the battery 30.

The battery 30 is formed as an integrated battery pack 33 including a first battery unit 31 and a second battery unit 32 arranged apart from each other on both sides of the propeller shaft 7 in the vehicle width direction. Each of the first and second battery units 31 and 32 is formed by connecting a plurality of battery modules for storing electric power supplied to the motor 5 to form a unit. The battery module is composed of a plurality of battery cells, and the battery cell is, for example, a lithium ion battery.

The fuel tank 20 and the first and second battery units 31, 32 are arranged below the floor panel 10, and the fuel tank 20 is located on the rear side of the vehicle from the first and second battery units 31, 32. 2 It is arranged so as to be higher than the battery units 31 and 32.

Battery-related electrical components related to the battery 30 are arranged in the vicinity of the first and second battery units 31 and 32. As battery-related electrical components, high-voltage components such as an inverter 41, a DC / DC converter 42, and a junction box 43 that are electrically connected to the first and second battery units 31 and 32 are arranged. The high-voltage component and the high-voltage harness described later are those to which a voltage exceeding 30 V AC and 60 V DC is applied.

The inverter 41 converts the DC power stored in the battery 30 into AC power and supplies it to the motor 5, and also converts the AC power generated by the motor 5 during vehicle deceleration into DC power to charge the battery 30. The DC / DC converter 42 converts high-voltage DC power such as 300 volts stored in the battery 30 into low-voltage DC power such as 12 volts and supplies it to an auxiliary machine or the like.

The junction box 43 is a front junction box 43a arranged on the front side of the vehicle from the first and second battery units 31 and 32, and a rear junction box 43a arranged on the rear side of the vehicle from the first and second battery units 31 and 32. It is equipped with 43b.

The front and rear junction boxes 43a and 43b are so-called junction boxes for protecting terminals and terminals used when connecting, branching, and relaying harnesses, respectively, and have a high voltage relay, a fuse, and the like. .. The front and rear junction boxes 43a and 43b are electrically connected to the first and second battery units 31 and 32.

The first and second battery units 31 and 32 are electrically connected by a battery harness which is a high voltage harness. The first and second battery units 31, 32 and the battery-related electrical components 41, 42, 43 are also electrically connected by a battery harness, which is a high-voltage harness. The first and second battery units 31 and 32 are also used as battery-related electrical components such as a junction box 43.

Battery control units 44 that control the first and second battery units 31 and 32 are arranged in the vicinity of the first and second battery units 31 and 32. The battery control unit 44 is electrically connected to the first and second battery units 31, 32, battery-related electric components 41, 42, 43, and the like by a harness.

Next, the substructure of the vehicle according to the embodiment of the present invention will be specifically described with reference to FIGS. 2 to 9.

FIG. 2 is a top view of the vehicle body to which the vehicle lower structure according to the embodiment of the present invention is applied, and FIG. 3 is a bottom view of the vehicle body to which the vehicle lower structure according to the embodiment of the present invention is applied. 4 is a cross-sectional view of the vehicle body along the Y4-Y4 line of FIG. 2, FIG. 5 is a cross-sectional view of the vehicle body along the Y5-Y5 line of FIG. 2, and FIG. A cross-sectional view of the vehicle body along the line, FIG. 7 is a cross-sectional view of the vehicle body along the Y7-Y7 line of FIG.

As shown in FIG. 2, the vehicle body 1 has a floor panel 10 at the lower part of the vehicle body, left and right side sills 21 connected to both ends of the floor panel 10 in the vehicle width direction and extending linearly in the vehicle front-rear direction, and a floor panel. A first cross member 22 and a second cross member 23 which are erected between the left and right side sills 21 and extend in the vehicle width direction on the upper surface side of the 10 are provided.

The floor panel 10 is formed with a tunnel portion 11 extending in the front-rear direction of the vehicle and bulging upward on the center side in the vehicle width direction. As shown in FIG. 6, the tunnel portion 11 includes an upper surface portion 11a and side surface portions 11b on both sides, and is open downward. As shown in FIG. 5, the front end portion of the floor panel 10 is connected to the dash panel 24. The dash panel 24 partitions the front side of the vehicle interior 25 and extends in the vertical direction of the vehicle body.

The floor panel 10 has a kick-up portion 12 formed higher than the front portion of the floor panel 10 on the rear portion of the floor panel 10. The kick-up portion 12 is provided below the rear seat 26. The kick-up portion 12 extends upward from the front side portion of the floor panel 10 and then extends substantially horizontally to the rear side of the vehicle.

A rear floor panel 27 formed higher than the rear end of the kick-up portion 12 is joined to the rear end of the floor panel 10, specifically to the rear end of the kick-up portion 12. The rear floor panel 27 extends upward from the rear end portion of the kick-up portion 12 and then extends substantially horizontally toward the rear side of the vehicle.

On the lower surface side of the rear floor panel 27, a third cross member 28 which is erected between the front ends of the left and right rear frames 14 and extends in the vehicle width direction is attached. The third cross member 28 is formed in a substantially hat-like cross section and is joined to the rear floor panel 27.

As shown in FIG. 6, the left and right side sill 21 are formed in a closed cross-sectional shape by joining the side sill inner 21a forming the inside of the vehicle body of the side sill 21 and the side sill outer 21b forming the outside of the vehicle body of the side sill 21, respectively. ..

The first and second cross members 22 and 23 are arranged apart from each other in the front-rear direction of the vehicle, and the first cross member 22 is arranged on the front side of the vehicle with respect to the second cross member 23. The first and second cross members 22 and 23 are each formed in a substantially hat-like cross section and joined to the floor panel 10.

The first and second cross members 22 and 23 are each divided in the vehicle width direction by the tunnel portion 11, and the divided first and second cross members 22 and 23 are respectively divided into side sills 21 at the outer ends in the vehicle width direction. It is joined, and the inner end portion in the vehicle width direction is joined to the tunnel portion 11.

As shown in FIG. 3, left and right floor frames 50 extending in the vehicle front-rear direction are arranged on the lower surface side of the floor panel 10 so as to be separated from each other in the vehicle width direction. The left and right floor frames 50 are arranged inside the left and right side sill 21 in the vehicle width direction, respectively, and are arranged between the side sill 21 and the tunnel portion 11 in the vehicle width direction.

As shown in FIG. 7, the floor frame 50 includes a lower surface portion 50a, side surface portions 50b on both sides, and flange portions 50c on both sides, and is formed in a substantially hat-shaped cross section. The floor frame 50 is formed in a closed cross section in cooperation with the floor panel 10 by joining the flange portions 50c on both sides to the floor panel 10.

The front ends of the left and right floor frames 50 are arranged on the front side of the vehicle at intervals in the vehicle width direction, and are connected to the left and right front frames 13 extending substantially linearly in the front-rear direction of the vehicle. The left and right front frames 13 are each formed in a closed cross section and extend from the dash panel 24 to the front side of the vehicle.

The rear ends of the left and right floor frames 50 are arranged on the rear side of the vehicle at intervals in the vehicle width direction, and are connected to the left and right rear frames 14 extending substantially linearly in the front-rear direction of the vehicle. The left and right rear frames 14 are formed in a substantially hat-shaped cross section and are attached to the lower surface side of the rear floor panel 27, and are formed in a closed cross section in cooperation with the rear floor panel 27.

The left and right floor frames 50 have a front inclined portion 51 that inclines outward in the vehicle width direction from the front side of the vehicle toward the rear side of the vehicle, and a front inclined portion 51 that extends linearly from the front inclined portion 51 toward the rear side of the vehicle and widens outward in the vehicle width direction. It has a widened portion 52 and a rear inclined portion 53 that inclines inward in the vehicle width direction from the widened portion 52 toward the rear side of the vehicle. The left and right floor frames 50 are widened outward in the vehicle width direction on the center side in the vehicle front-rear direction as compared with the vehicle front side and the vehicle rear side, and the left and right widening portions 52 are wider than the front inclined portion 51 and the rear inclined portion 53. It is formed large in the width direction.

As shown in FIG. 6, left and right tunnel reinforcing members 54 arranged apart from each other in the vehicle width direction and extending in the vehicle front-rear direction are joined to both sides of the tunnel portion 11 in the vehicle width direction on the lower surface side of the floor panel 10. ing. The tunnel reinforcing member 54 is joined to the lower surface side of the floor panel 10 and is formed in a closed cross section in cooperation with the floor panel 10.

As shown in FIG. 2, left and right floor reinforcing members 56 extending in the front-rear direction of the vehicle are joined to the upper surface side of the floor panel 10 along the front inclined portion 51 of the floor frame 50. The floor reinforcing member 56 is formed in a closed cross section in cooperation with the floor panel 10. The front end of the floor reinforcing member 56 is joined to the dash panel 24, and the rear end of the floor reinforcing member 56 is joined to the first cross member 22. The vehicle body constituent members such as the floor panel 10, the floor frame 50, and the tunnel reinforcing member 54 are formed by press-molding, for example, a steel plate.

Below the floor panel 10, the automatic transmission 4 and the propeller shaft 7 are arranged on the center side in the vehicle width direction. As shown in FIG. 4, the automatic transmission 4 and the propeller shaft 7 are arranged in the tunnel portion 11 and supported by the vehicle body 1. As shown in FIG. 3, the automatic transmission 4 is arranged between the front inclined portions 51 of the left and right floor frames 50, and the propeller shaft 7 is located between the widened portions 52 and the rear inclined portions 53 of the left and right floor frames 50. Have been placed.

Below the floor panel 10, a fuel tank 20 is arranged between the rear inclined portions 53 of the left and right floor frames 50. The fuel tank 20 is arranged below the kick-up portion 12 of the floor panel 10 and is arranged so as to be higher than the front portion of the floor panel 10.

As shown in FIG. 5, the upper surface portion 20a of the fuel tank 20 is arranged above the front side portion of the floor panel 10, and the lower surface portion 20b of the fuel tank 20 is arranged below the front side portion of the floor panel 10. There is. The fuel tank 20 is formed so as to extend on both sides in the vehicle width direction and in the vehicle front-rear direction, and a hollow space for storing fuel is formed inside.

As shown in FIG. 4, the fuel tank 20 has a recess 20c recessed in a substantially semicircular cross section on the upper side so as to avoid interference with the propeller shaft 7 on the center side of the lower surface portion 20b in the vehicle width direction. There is. As shown in FIG. 3, the fuel tank 20 is supported from below by the left and right fixing belts 57 that fix the fuel tank 20, and is fixed to the vehicle body 1. The front end of the fixing belt 57 is fixed to the tank mounting member 58 attached to the widening portion 52 of the floor frame 50 by using fastening bolts, and the rear end of the fixing belt 57 is in the vehicle width direction of the third cross member 28. It is fixed to the tank mounting member 59 mounted on the center side by using a fastening bolt.

Below the floor panel 10, an exhaust pipe 17 extending from the engine 3 and a catalyst device 18 are arranged. The exhaust pipe 17 and the catalyst device 18 are supported by the floor panel 10. The catalyst device 18 is arranged between the front inclined portions 51 of the left and right floor frames 50, and is arranged between the front inclined portions 51 of the floor frame 50 on the right side of the vehicle, which is one side in the vehicle width direction, and the automatic transmission 4. ing.

The exhaust pipe 17 arranged below the floor panel 10 extends upstream from the catalyst device 18 to the front side of the vehicle along the front inclined portion 51 of the floor frame 50 and is connected to the engine 3, and the downstream side from the catalyst device 18 is the vehicle width. After extending inward in the direction, it extends substantially linearly toward the rear side of the vehicle and is connected to the silencer 19.

The exhaust pipe 17 extends in the vehicle front-rear direction below the propeller shaft 7 below the tunnel portion 11 of the floor panel 10. As shown in FIG. 6, below the tunnel portion 11 of the floor panel 10, the exhaust pipe 17 is arranged at a position where the central shaft 7a of the propeller shaft 7 and the central shaft 17a of the exhaust pipe 17 coincide with each other in the vehicle width direction. Has been done.

Below the floor panel 10, first and second battery units 31 and 32 arranged apart from each other on both sides of the propeller shaft 7 in the vehicle width direction are arranged. The first and second battery units 31 and 32 are each formed as a high-voltage battery unitized by connecting a plurality of battery modules.

The first and second battery units 31 and 32 are arranged between the widening portions 52 of the left and right floor frames 50 on the front side of the vehicle from the kick-up portion 12 of the floor panel 10. The first battery unit 31 is arranged between the widening portion 52 of the floor frame 50 on the left side of the vehicle and the propeller shaft 7 in the vehicle width direction, and the second battery unit 32 is located on the floor frame 50 on the right side of the vehicle in the vehicle width direction. It is arranged between the widening portion 52 and the propeller shaft 7. The first and second battery units 31 and 32 are integrally formed as a battery pack 33 and are supported by the vehicle body 1.

8 is a perspective view of the battery pack, FIG. 9 is a cross-sectional view of the battery pack along the Y9-Y9 line of FIG. 8, and FIG. 10 is a cross-sectional view of the battery pack along the Y10-Y10 line of FIG. be. In FIG. 10, the positions of the floor panel 10, the fuel tank 20, and the rear seat 26 when the battery pack is attached to the vehicle body are shown by a two-dot chain line. As shown in FIGS. 8 to 10, the battery packs 33 are the first and second battery units 31 and 32 and the first and second battery units 31 which are arranged apart from each other on both sides of the propeller shaft 7 in the vehicle width direction. It has a battery cover 60 for accommodating 32, 32.

The first and second battery units 31 and 32 are each formed in a substantially rectangular shape in a plan view and are formed in a substantially rectangular parallelepiped shape. The first and second battery units 31, 32 are not limited to this, but are formed substantially symmetrically on both sides of the propeller shaft 7 in the vehicle width direction. As described above, the first and second battery units 31 and 32 are arranged between the widening portions 52 of the floor frame 50, and the width in the vehicle width direction is increased as compared with the case where the floor frame is not widened outward in the vehicle width direction. The battery capacity is formed to be large by increasing the size.

The battery cover 60 includes a first battery accommodating unit 61 accommodating the first battery unit 31, a second battery accommodating unit 66 accommodating the second battery unit 32, and the first battery accommodating unit 61 and the second battery accommodating unit 66. Has a connecting portion 71 extending in the vehicle width direction by connecting the above. The battery cover 60 is formed using, for example, an aluminum material.

The first battery accommodating portion 61 is formed in a substantially rectangular parallelepiped shape, and the first upper cover member 62 forming the upper side of the first battery accommodating portion 61 and the first lower cover forming the lower side of the first battery accommodating portion 61. It is composed of a member 63.

The first upper cover member 62 is formed in a substantially rectangular shape, has an upper surface portion 62a extending in a substantially horizontal direction, a side surface portion 62b extending downward from the peripheral edge portion of the upper surface portion 62a, and outward from the lower end portion of the side surface portion 62b. It is provided with a flange portion 62c extending in a substantially horizontal direction, and is formed so that the upper surface portion 62a bulges upward.

The first lower cover member 63 has a lower surface portion 63a formed in a substantially rectangular shape and extending in a substantially horizontal direction, a side surface portion 63b extending upward from the peripheral edge portion of the lower surface portion 63a, and outward from the upper end portion of the side surface portion 63b. Is provided with a flange portion 63c extending in a substantially horizontal direction, and the lower surface portion 63a is formed so as to bulge downward.

The first battery accommodating portion 61 is formed by connecting the flange portion 62c and the flange portion 63c so that the first upper cover member 62 and the first lower cover member 63 are coupled. The first battery unit 31 is attached to the lower surface portion 63a of the first lower cover member 63, and is housed inside the first upper cover member 62 and the first lower cover member 63.

The first battery accommodating portion 61 is formed with a front extending portion 64 extending in a substantially rectangular parallelepiped shape from the outside in the vehicle width direction on the vehicle front side of the first battery accommodating portion 61 to the front side of the vehicle. The first upper cover member 62 and the first lower cover member 63 each extend from the outside in the vehicle width direction on the vehicle front side to the vehicle front side so as to form the front extending portion 64.

The front junction box 43a is formed in a substantially rectangular parallelepiped shape and in a flat shape. The front junction box 43a is arranged horizontally so that the height in the vertical direction is smaller than the length in the front-rear direction of the vehicle. The front junction box 43a is attached to the lower surface portion 63a of the first lower cover member 63 constituting the front extension portion 64 on the vehicle front side of the first battery unit 31, and the first upper cover member 62 and the first lower cover. It is housed inside the member 63.

As shown in FIG. 3, the first battery accommodating portion 61 is formed with a first opening 62d on the upper surface portion 62a of the first upper cover member 62 on the rear side of the vehicle from the first battery unit 31. The first opening 62d is formed in a substantially rectangular shape, and is formed in an elongated hole shape that is longer in the vehicle width direction than in the vehicle front-rear direction. A rear junction box 43b, a battery harness, and the like are inserted into the first opening 62d.

The second battery accommodating portion 66 is formed in a substantially rectangular parallelepiped shape, and the second upper cover member 67 forming the upper side of the second battery accommodating portion 66 and the second lower cover forming the lower side of the second battery accommodating portion 66. It is composed of a member 68.

The second upper cover member 67 has an upper surface portion 67a formed in a substantially rectangular shape and extending in a substantially horizontal direction, a side surface portion 67b extending downward from the peripheral edge portion of the upper surface portion 67a, and outward from the lower end portion of the side surface portion 67b. It is provided with a flange portion 67c extending in a substantially horizontal direction, and is formed so that the upper surface portion 67a bulges upward.

The second lower cover member 68 has a lower surface portion 68a formed in a substantially rectangular shape and extending in a substantially horizontal direction, a side surface portion 68b extending upward from the peripheral edge portion of the lower surface portion 68a, and outward from the upper end portion of the side surface portion 68b. Is provided with a flange portion 68c extending in a substantially horizontal direction, and the lower surface portion 68a is formed so as to bulge downward.

The second battery accommodating portion 66 is formed by connecting the second upper cover member 67 and the second lower cover member 68 by connecting the flange portion 67c and the flange portion 68c. The second battery unit 32 is attached to the lower surface portion 68a of the second lower cover member 68, and is housed inside the second upper cover member 67 and the second lower cover member 68.

As shown in FIG. 3, the second battery accommodating portion 66 is formed with a second opening 67d on the upper surface portion 67a of the second upper cover member 67 on the rear side of the vehicle from the second battery unit 32. The second opening 67d is formed in a substantially rectangular shape, and is formed in an elongated hole shape that is longer in the vehicle width direction than in the vehicle front-rear direction. A battery control unit 44, a battery harness, and the like are inserted into the second opening 67d.

The connecting portion 71 is formed in a substantially rectangular parallelepiped shape that extends longer in the vehicle width direction than in the vehicle front-rear direction and the vertical direction. The connecting portion 71 connects the vehicle rear side of the first battery accommodating portion 61 and the second battery accommodating portion 66. The connecting portion 71 is formed to be smaller in length in the vehicle front-rear direction than the first and second battery accommodating portions 61 and 66.

The connecting portion 71 is higher than the first and second battery accommodating portions 61 and 66, connects the first and second battery accommodating portions 61 and 66, extends in the vehicle width direction, and is arranged adjacent to the front side of the fuel tank 20. Will be done. As shown in FIG. 9, the connecting portion 71 is composed of a front cover member 72 constituting the vehicle front side of the connecting portion 71 and a rear cover member 73 forming the vehicle rear side of the connecting portion 71.

The front cover member 72 includes a lower surface portion 72a attached to the upper surface portions 62a and 67a of the first and second battery accommodating portions 61 and 66, and a peripheral wall portion 72b extending upward from the lower surface portion 72a. As shown in FIG. 3, the lower surface portion 72a of the front cover member 72 corresponds to the first opening 62d of the first battery accommodating portion 61 and the second opening 67d of the second battery accommodating portion 66 on both sides in the vehicle width direction. Therefore, the first opening 72c and the second opening 72d are formed.

The first and second openings 72c and 72d of the front cover member 72 are formed to have substantially the same shape as the first and second openings 62d and 67d of the first and second battery accommodating portions 61 and 66. The first and second openings 72c and 72d of the front cover member 72 are formed in a substantially rectangular shape, and are formed in an elongated hole shape that is longer in the vehicle width direction than in the vehicle front-rear direction. The rear junction box 43b, the battery harness, and the like are inserted into the first opening 72c, and the battery control unit 44, the battery harness, and the like are inserted into the second opening 72d.

The peripheral wall portion 72b of the front cover member 72 extends upward from the lower surface portion 72a to form the front side of the connecting portion 71 and both sides in the vehicle width direction. A mating surface 72e with the rear cover member 73 is formed on the peripheral wall portion 72b on the rear side of the vehicle. The mating surface 72e of the front cover member 72 is formed so as to be inclined toward the lower side of the vehicle toward the rear side of the vehicle over the entire width direction of the vehicle.

The rear cover member 73 includes an upper surface portion 73a and a peripheral wall portion 73b extending downward from the upper surface portion 73a. The peripheral wall portion 73b of the rear cover member 73 extends downward from the upper surface portion 73a and constitutes the vehicle rear side and both sides of the connecting portion 71 in the vehicle width direction. The peripheral wall portion 73b is formed with a mating surface 73c with the front cover member 72 on the front side of the vehicle. The mating surface 73c of the rear cover member 73 is formed so as to be inclined toward the lower side of the vehicle toward the rear side of the vehicle over the entire width direction of the vehicle.

The front cover member 72 uses a plurality of fastening bolts B in which the lower surface portions 72a of the front cover member 72 are overlapped with the upper surface portions 62a and 67a of the first and second battery accommodating portions 61 and 66 and extend in the vertical direction. It is coupled to the 1st and 2nd battery accommodating portions 61 and 66. The rear cover member 73 uses a plurality of fastening bolts B whose mating surfaces 73c of the rear cover member 73 are aligned with the mating surfaces 72e of the front cover member 72 and extend incline to the front side of the vehicle and the lower side of the vehicle. It is bound to 72.

In the connecting portion 71, the front side cover member 72 and the rear side cover member 73 are connected to form a hollow space inside. The connecting portion 71 has a recess 76a recessed upward on the lower side of the central portion 76 in the vehicle width direction. The recess 76a of the connecting portion 71 is formed between the first battery accommodating portion 61 and the second battery accommodating portion 66 in the vehicle width direction so as to correspond to the tunnel portion 11 of the floor panel 10.

The central portion 76 in the vehicle width direction of the connecting portion 71 is formed by the recesses 76a to be shorter in the vertical direction than the outer portions 77 in the vehicle width direction on both sides. The central portion 76 in the vehicle width direction of the connecting portion 71 functions as a vulnerable portion 76 that is vulnerable to the impact load acting from the outside in the vehicle width direction when an impact load is applied to the battery pack 33 from the outside in the vehicle width direction.

The rear junction box 43b is arranged in the vehicle width direction outer portion 77 on the left side of the vehicle of the connecting portion 71. The rear junction box 43b is formed in a flat shape and is arranged vertically so that the length in the front-rear direction of the vehicle is smaller than the height in the vertical direction.

As shown in FIG. 9, the rear junction box 43b is mounted on a base 63d provided in the first battery accommodating portion 61, and is of the first opening 62d and the connecting portion 71 of the first battery accommodating portion 61. It is housed in the connecting portion 71 and in the first battery accommodating portion 61 through the first opening 72c. As shown in FIG. 5, the rear junction box 43b is arranged adjacent to the front side of the fuel tank 20 so as to be higher than the first and second battery units 31 and 32.

The battery control unit 44 is arranged in the outer portion 77 in the vehicle width direction on the right side of the vehicle of the connecting portion 71. The battery control unit 44 is formed in a flat shape and is arranged vertically so that the length in the front-rear direction of the vehicle is smaller than the height in the vertical direction.

As shown in FIG. 10, the battery control unit 44 is mounted on a base 68d provided in the second battery accommodating portion 66, and the second opening 67d of the second battery accommodating portion 66 and the connecting portion 71. It is housed in the connecting portion 71 and in the second battery accommodating portion 66 through the two openings 72d. The battery control unit 44 is arranged adjacent to the vehicle front side of the fuel tank 20 so as to be higher than the first and second battery units 31 and 32.

In the connecting portion 71, as shown in FIG. 8, the battery harness 78 that electrically connects the first and second battery units 31 and 32, and the rear junction box 43b and the battery control unit 44 are electrically connected. A battery harness such as the battery harness 79 extends in the vehicle width direction through the central portion 76 in the vehicle width direction.

As shown in FIG. 6, in the battery pack 33, a plurality of mounting portions 61a, 66a on the outer sides of the first and second battery accommodating portions 61, 66 in the vehicle width direction are fixed to the floor frame 50 by using a plurality of fastening bolts B. Then, a plurality of mounting portions 61b, 66b inside the first and second battery accommodating portions 61, 66 in the vehicle width direction are fixed to the tunnel reinforcing member 54 using a plurality of fastening bolts B, and fuel is supplied below the floor panel 10. It is installed adjacent to the front side of the tank 20.

When the battery pack 33 is attached below the floor panel 10, the first and second battery units 31 and 32 are arranged apart from each other on both sides of the propeller shaft 7 in the vehicle width direction, and the connecting portion 71 is attached to the floor panel 10. The battery harness 78, which is arranged below the kick-up portion 12 and above the propeller shaft 7 and electrically connects the first and second battery units 31 and 32, is arranged so as to pass above the propeller shaft 7. ..

The connecting portion 71 of the battery pack 33 is also arranged so as to be higher than the first and second battery accommodating portions 61 and 66, and the fuel is located below the kick-up portion 12 of the floor panel 10 arranged below the rear seat 26. It is arranged on the front side of the vehicle of the tank 20.

The rear junction box 43b and the battery control unit 44 are arranged below the kick-up portion 12 of the floor panel 10 and are spaced apart from each other on both sides of the propeller shaft 7 in the vehicle width direction. The battery control unit 44 is arranged at a position where it overlaps with at least a part of the rear junction box 43b in the vehicle front-rear direction when viewed from the vehicle side.

As shown in FIG. 5, an inverter 41 and a DC / DC converter 42 are arranged as battery-related electrical components in the vicinity of the battery pack 33, specifically, the vehicle front side of the first battery accommodating portion 61. The inverter 41 and the DC / DC converter 42 are each formed in a flat shape, and the height in the vertical direction is smaller than the length in the front-rear direction of the vehicle, and the inverter 41 and the DC / DC converter 42 are arranged horizontally. As shown in FIG. 3, the inverter 41 and the DC / DC converter 42 are each formed in a substantially rectangular shape in a plan view.

The inverter 41 and the DC / DC converter 42 are formed to have a width smaller in the vehicle width direction than the first and second battery units 31 and 32, respectively. The DC / DC converter 42 is formed to have a smaller width in the vehicle width direction and a larger length in the vehicle front-rear direction than the inverter 41.

The inverter 41 and the DC / DC converter 42 are arranged between the front inclined portions 51 of the left and right floor frames 50, and are arranged between the transmission 4 and the front inclined portions 51 of the floor frame 50 on the left side of the vehicle. The inverter 41 and the DC / DC converter 42 are arranged so that the inside in the vehicle width direction substantially coincides with the vehicle width direction.

The DC / DC converter 42 is arranged on the front side of the vehicle from the inverter 41 and is arranged on the upper side of the inverter 41 in the vertical direction. As shown in FIGS. 5 and 7, the inverter 41 and the DC / DC converter 42 are housed in the inverter case 41a and the converter case 42a, respectively, and are directly or indirectly floored by using a plurality of fastening bolts B. It is attached to the panel 10.

The inverter 41 and the DC / DC converter 42 are arranged between the transmission 4 and the floor frame 50 on the left side of the vehicle, and the catalyst device 18 is arranged between the transmission 4 and the floor frame 50 on the right side of the vehicle. .. The inverter 41, the DC / DC converter 42, and the catalyst device 18 are arranged apart from each other on one side and the other side in the vehicle width direction, and the inverter 41 and the DC / DC converter 42 are at least the catalyst device 18 in the vehicle side view. It is located so that it overlaps part of the vehicle in the front-rear direction.

The inverter 41 and the DC / DC converter 42 are electrically connected to the first battery unit 31 and the front junction box 43a by a battery harness 80 which is a high voltage harness. The battery harness 80 that electrically connects the inverter 41 and the DC / DC converter 42 to the first battery unit 31 and the front junction box 43a is located on the front side in the vehicle width direction from the front extension portion 64 of the first battery accommodating portion 61. It extends in the front-rear direction of the vehicle along the extension portion 64.

Although not shown, the vehicle body 1 is also provided with battery-related electrical components such as a heater unit that heats the interior of the vehicle interior 25 between the transmission 4 and the front inclined portion 51 of the floor frame 50 on the left side of the vehicle. Has been done. The heater unit is composed of a sheet-shaped heating wire heater, for example, a PTC (Positive Temperature Coefficient) heater, which is formed in a flat shape.

In the vehicle body 1 configured in this way, when an impact load is applied from the front of the vehicle body at the time of a head-on collision, when an impact load is applied to the drive source 2 from the front of the vehicle body, the front side of the vehicle of the differential device 8 rotates downward. At the same time, the rear side of the propeller shaft 7 moves downward and is deformed, and the drive source 2 is moved to the rear of the vehicle body.

Since the first and second battery units 31 and 32 are arranged on both sides of the propeller shaft 7 in the vehicle width direction below the floor panel 10, the rear side of the propeller shaft 7 moves downward and is deformed. Also, it is possible to prevent the propeller shaft 7 from coming into contact with the first and second battery units 31 and 32. The battery harness 78 that electrically connects the first and second battery units 31 and 32 is also arranged so as to pass above the propeller shaft 7, so that the propeller shaft 7 is prevented from coming into contact with the battery harness 78. be able to.

In the vehicle body 1, when an impact load is applied from the outside in the vehicle width direction at the time of a side collision and an impact load is applied to the battery pack 33 from the outside in the vehicle width direction, the connecting portion 71 of the battery pack 33 is provided with a fragile portion 76. Therefore, it is possible to prevent the fragile portions 76 from being crushed and deformed so that the first and second battery accommodating portions 61 and 66 are crushed and deformed.

As described above, in the vehicle lower structure according to the present embodiment, the first and second battery units 31 and 32 and the floor panel are arranged below the floor panel 10 so as to be separated from each other on both sides of the propeller shaft 7 in the vehicle width direction. A fuel tank 20 arranged below the first and second battery units 31 and 32 and higher than the first and second battery units 31 and 32 on the rear side of the vehicle, and a battery control unit 44 formed in a flat shape. Is provided. The battery control unit 44 is placed on the vehicle rear side of the first and second battery units 31 and 32 so that the length in the vehicle front-rear direction is smaller than the height in the vertical direction, that is, vertically installed on the vehicle front side of the fuel tank 20. Placed next to each other.

As a result, when the fuel tank 20 is arranged below the kick-up portion 12 of the floor panel 10 on the vehicle rear side of the first and second battery units 31 and 32, the battery is controlled adjacent to the vehicle front side of the fuel tank 20. By arranging the unit 44 vertically, the battery control unit 44 can be arranged more compactly in the vehicle front-rear direction below the kick-up portion 12 of the floor panel 10 as compared with the case where the unit 44 is arranged horizontally. can.

Since the battery control unit 44 is arranged adjacent to the vehicle front side of the fuel tank 20 arranged higher than the first and second battery units 31 and 32 on the vehicle rear side of the first and second battery units 31 and 32. , It is possible to suppress a decrease in battery capacity and vehicle interior space as compared with the case where the first and second battery units 31 and 32 are arranged so as to be overlapped on the upper side.

Therefore, in a vehicle in which the first and second battery units 31 and 32 are arranged on both sides of the propeller shaft 7 in the vehicle width direction below the floor panel 10, the battery control unit 44 is compactly arranged in the vehicle front-rear direction and the battery capacity. And the reduction of the passenger compartment space can be suppressed.

Further, the floor panel 10 has a kick-up portion 12 formed higher than the front portion below the rear seat 26 on the rear side portion, and the battery control unit 44 and the fuel tank 20 are below the kick-up portion 12. Be placed. As a result, the battery control unit 44 and the fuel tank 20 are arranged below the kick-up portion 12 of the floor panel 10 arranged below the rear seat 26, so that the passenger compartment space is narrowed and the occupant comfort is reduced. It is possible to suppress the causing.

Further, the junction box 43 is arranged so that the length in the front-rear direction of the vehicle is smaller than the height in the vertical direction on the rear side of the vehicles of the first and second battery units 31 and 32, that is, the front side of the fuel tank 20 is installed vertically. The battery control unit 44 and the junction box 43 are arranged adjacent to each other so as to be separated from each other on both sides of the propeller shaft 7 in the vehicle width direction, and the battery control unit 44 is arranged with at least a part of the junction box 43 in the vehicle side view. It is placed at a position that overlaps in the front-rear direction of the vehicle. As a result, the junction box 43 is vertically arranged on the vehicle front side of the fuel tank 20 on the vehicle rear side of the first and second battery units 31 and 32, and the battery control unit 44 is at least a part of the junction box 43 and the vehicle. Since the battery control unit 44 and the junction box 43 are arranged so as to overlap each other in the front-rear direction, the battery control unit 44 and the junction box 43 can be compactly arranged in the front-rear direction of the vehicle.

Further, the battery cover 60 accommodating the first battery unit 31 and the second battery unit 32 includes a first battery accommodating unit 61, a second battery accommodating unit 66, a first battery accommodating unit 61, and a second battery accommodating unit 66. The battery control unit 44 is arranged in the connecting portion 71, and includes a connecting portion 71 extending in the vehicle width direction. As a result, the battery cover 60 includes a connecting portion 71 that connects the first battery accommodating portion 61 and the second battery accommodating portion 66 and extends in the vehicle width direction, and the battery control unit 44 is arranged in the connecting portion 71. Therefore, the battery control unit 44 can be protected by the battery cover 60.

Further, the connecting portion 71 is formed by combining the front cover member 72 and the rear cover member 73, and the mating surfaces 72e and 73c of the front cover member 72 and the rear cover member 73 are formed toward the rear side of the vehicle, respectively. It is formed so as to incline downward. As a result, the battery control is arranged in the connecting portion 71 by enlarging the openings of the mating surfaces 72e and 73c as compared with the case where the mating surfaces of the front cover member 72 and the rear cover member 73 are not formed to be inclined. The unit 44 can be easily attached and detached, and the work efficiency can be improved.

In the present embodiment, the drive motor 5 is arranged between the engine 3 and the transmission 4, but the drive motor is arranged separately from the engine 3 and the transmission 4 from at least one of the engine 3 and the drive motor 5. The power may be transmitted to the drive wheels 6.

The vehicle according to the present embodiment is a vertical engine hybrid vehicle in which the engine 3 is arranged on the front side of the vehicle and the power from the engine 3 is transmitted to the drive wheels 6 arranged on the rear side of the vehicle. The same applies to the four-wheel drive hybrid vehicle of the type and the four-wheel drive hybrid vehicle of the horizontal engine type based on the front engine / front drive vehicle.

The present invention is not limited to the illustrated embodiments, and various improvements and design changes can be made without departing from the gist of the present invention.

As described above, according to the present invention, in a vehicle in which the first and second battery units are arranged on both sides of the propeller shaft in the vehicle width direction below the floor panel, the battery control units are compactly arranged in the vehicle front-rear direction. At the same time, it is possible to suppress a decrease in battery capacity and vehicle interior space, so that it may be suitably used in this type of vehicle.

2 Drive source 3 Engine 5 Motor 7 Propeller shaft 10 Floor panel 12 Kick-up part 20 Fuel tank 31 1st battery unit 32 2nd battery unit 43 Junction box 44 Battery control unit 60 Battery cover 61 1st battery housing part 66 2nd battery Accommodating part 71 Connecting part 72 Front side cover member 73 Rear side cover member

Claims (5)

A drive source having an engine and a drive motor, a floor panel forming the floor surface of the vehicle interior, and a propeller shaft extending below the floor panel in the front-rear direction of the vehicle to transmit power from the drive source to the drive wheels. It is the substructure of the equipped vehicle
A first battery unit and a second battery unit, which are arranged below the floor panel on both sides of the propeller shaft in the vehicle width direction and store electric power supplied to the drive motor,
A fuel tank arranged below the floor panel so as to be higher than the first battery unit and the second battery unit on the rear side of the vehicle than the first battery unit and the second battery unit.
A battery control unit formed in a flat shape and controlling the first battery unit and the second battery unit is provided.
The battery control unit is arranged adjacent to the vehicle front side of the fuel tank on the vehicle rear side of the first battery unit and the second battery unit so that the length in the vehicle front-rear direction is smaller than the height in the vertical direction. ing,
The substructure of the vehicle is characterized by that. The floor panel has a kick-up portion formed in the rear portion of the floor panel below the rear seat and higher than the front portion of the floor panel.
The battery control unit and the fuel tank are arranged below the kick-up portion.
The vehicle substructure according to claim 1, wherein the vehicle is characterized by the above. Equipped with a flattened junction box
The junction box is higher than the first battery unit and the second battery unit on the vehicle rear side of the first battery unit and the second battery unit so that the length in the vehicle front-rear direction is smaller than the height in the vertical direction. Arranged adjacent to the vehicle front side of the fuel tank,
The battery control unit and the junction box are arranged apart from each other on both sides of the propeller shaft in the vehicle width direction.
The battery control unit is arranged at a position where it overlaps with at least a part of the junction box in the front-rear direction of the vehicle when viewed from the side of the vehicle.
The vehicle substructure according to claim 1 or 2, wherein the vehicle is characterized in that. It has a battery cover for accommodating the first battery unit and the second battery unit, and has a battery cover.
The battery cover is
A first battery accommodating portion accommodating the first battery unit and
A second battery accommodating portion accommodating the second battery unit and
It has a first battery accommodating portion and a connecting portion that connects the second battery accommodating portion and extends in the vehicle width direction.
The battery control unit is arranged in the connecting portion.
The vehicle substructure according to any one of claims 1 to 3, wherein the vehicle is characterized by the above. The connecting portion is formed by combining a front cover member arranged on the front side of the vehicle and a rear cover member arranged on the rear side of the vehicle.
The mating surfaces of the front cover member and the rear cover member are formed so as to be inclined toward the lower side of the vehicle toward the rear side of the vehicle.
The vehicle substructure according to claim 4, wherein the vehicle is characterized by the above.

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