JP7087527B2 - Body underside structure - Google Patents

Description

The present invention relates to a vehicle body lower surface structure. Specifically, the present invention comprises a torsion beam type rear suspension composed of a pair of left and right trailing arms and a torsion beam connecting them, and a floor underside for rectification covering the vehicle body lower surface in front of the rear suspension. It relates to the underside structure of the vehicle body to which the cover is attached.

Generally, a torsion beam type rear suspension is known as a structure for suspending a pair of left and right rear wheels. This torsion beam type rear suspension includes a pair of left and right trailing arms extending in the front-rear direction of the vehicle, and a torsion beam extending in the width direction of the vehicle to connect them.

In the above-mentioned vehicle provided with the torsion beam type rear suspension, Patent Document 1 aims to deflect the flow of the underfloor traveling wind from the lower part of the floor to the outside of the rear wheel vehicle and rectify it so that it flows straight to the rear in the front-rear direction of the vehicle. As disclosed, the above-mentioned trailing arm having an arm cover provided on the lower surface thereof is disclosed.

A floor under cover for rectification that covers the underside of the vehicle body is provided in front of the above-mentioned rear suspension to speed up the flow under the floor, and when this floor under cover and the above-mentioned arm cover are installed side by side, it goes into the rear wheel house. While it is possible to suppress the rise and entry of the underfloor running wind, the underfloor running wind rises into the rear wheel house from the gap between the inner edge of the rear wheel tire, the rear end of the floor undercover and the front end of the arm cover. It turned out to be intruding.

By the way, Patent Document 2 discloses a structure including a torsion beam type rear suspension and a rear under cover for rectification provided on the lower surface of the rear vehicle body.

However, in the above-mentioned Patent Documents 1 and 2, the underfloor running wind rises into the rear wheel house from the gap between the inner edge of the rear wheel tire, the rear end of the floor under cover, and the front end of the arm cover. The point of interest is not disclosed.

Japanese Patent No. 5235220 Japanese Unexamined Patent Publication No. 2017-39354

Therefore, the present invention suppresses the underfloor running wind from entering the wheel house from the gap between the inner edge of the rear wheel tire, the rear end of the floor under cover, and the front end of the arm cover, and thus the turbulence of the rear flow of the vehicle body. It is an object of the present invention to provide a vehicle body lower surface structure capable of suppressing the above.

The vehicle body lower surface structure according to the present invention is provided with a torsion beam type rear suspension consisting of a pair of left and right trailing arms and a torsion beam connecting them, and a floor undercover for rectification covering the vehicle body lower surface is attached to the front of the rear suspension. A plate-shaped rectifying arm cover that covers the trailing arm under the trailing arm is attached to the lower part of the trailing arm from the trailing arm. An arm cover expansion portion that projects outward in the width direction is provided, and the floor undercover covers the floor undercover so that the rear end portion of the floor undercover located in front faces and approaches the front edge of the arm cover expansion portion. An enlarged portion is formed , and the rear end side of the floor under cover and the front end side of the arm cover are arranged in close proximity to each other when viewed from the lower surface of the vehicle body. The outer outer edge of the arm cover enlargement portion is continuous with the rear wheel tire in the front-rear direction of the vehicle, bypassing the inner surface of the front portion of the rear wheel tire with an envelope .

According to the above configuration, there is a gap (that is, the inner edge of the tire of the rear wheel and the rear end of the floor undercover) for communicating the underfloor and the rear wheel house by both the enlarged portion of the arm cover and the expanded portion of the floor undercover. The gap between the portion and the front end portion of the arm cover) can be reduced to suppress the entry of the underfloor traveling wind into the wheel house, and as a result, the turbulence of the wake of the vehicle body can be suppressed.

Moreover, when viewed from the lower surface of the vehicle body, the rear end side of the floor under cover and the front end side of the arm cover are arranged in close proximity to each other, and the outer outer edge of the floor under cover enlargement portion and the arm cover enlargement. Since the outer outer edge of the vehicle portion is continuous with the rear wheel tire in the front-rear direction of the vehicle by bypassing the inner side surface of the front portion of the rear wheel tire with an envelope , the following effects are obtained.

That is, since only the necessary gap remains between the inner edge of the rear wheel tire, the rear end of the floor undercover, and the front end of the arm cover, it is possible to prevent the wind passing through the floor undercover from rising into the wheel house. The intrusion can be suppressed more reliably.

The vehicle body lower surface structure according to the present invention also includes a torsion beam type rear suspension composed of a pair of left and right trailing arms and a torsion beam connecting them, and a floor undercover for rectification covering the vehicle body lower surface is provided in front of the rear suspension. It is an attached vehicle body lower surface structure, and a plate-shaped rectifying arm cover for covering the trailing arm is attached to the lower part of the trailing arm when viewed from the lower surface of the vehicle body, and the trailing arm is attached to the arm cover when viewed from the lower surface of the vehicle body. An arm cover expansion portion that projects outward in the vehicle width direction is provided, and the floor is placed on the floor undercover so that the rear end portion of the floor undercover located in front faces and approaches the front edge of the arm cover expansion portion. An undercover enlarged portion is formed, and the outer end portion of the front edge of the arm cover in the vehicle width direction and the outer end portion of the rear edge of the floor undercover enlarged portion in the vehicle width direction are at the same position in the vehicle width direction. It is characterized by that.

According to the present invention, the underfloor running wind is suppressed from entering the wheel house from the gap between the inner edge of the rear wheel tire, the rear end of the floor under cover, and the front end of the arm cover, and thus the turbulence of the rear flow of the vehicle body is suppressed. Has the effect of suppressing.

Side view of the vehicle provided with the vehicle body lower surface structure of the present invention. Bottom view of the main part of FIG. Enlarged view of the left side of the vehicle in FIG. Side view showing the related structure of the floor under cover and the arm cover Cross-sectional view taken along the line AA in FIG. Enlarged bottom view of the main part showing the flow of the underfloor running wind of this embodiment (A) is a bottom perspective view showing the flow of the underfloor running wind of this embodiment, and (b) is a bottom perspective view showing the flow of the underfloor running wind of the comparative example.

The purpose is to prevent underfloor running wind from entering the wheel house through the gap between the inner edge of the rear wheel tires, the rear end of the floor undercover, and the front end of the arm cover, thereby suppressing turbulence in the rearflow of the vehicle body. A torsion beam type rear suspension consisting of a pair of left and right trailing arms and a torsion beam connecting them, and a floor undercover for rectification that covers the underside of the vehicle body is attached to the front of the rear suspension. A plate-shaped rectifying arm cover is attached to the lower part of the trailing arm to cover it when viewed from the bottom of the vehicle body, and the arm cover projects outward from the trailing arm when viewed from the bottom of the vehicle body. An arm cover expansion portion is provided, and a floor undercover expansion portion is formed on the floor undercover so that the rear end portions of the floor undercover located in front face each other and approach the front edge of the arm cover expansion portion. The rear end side of the floor undercover and the front end side of the arm cover are arranged in close proximity to each other in a bottom view, and the outer edge of the floor undercover enlargement portion and the outside of the arm cover enlargement portion are located on the outer side of the vehicle. The outer edge is realized by a configuration in which the rear wheel tire is separated from the envelope and bypasses the front inner surface of the rear wheel tire and is continuous in the front-rear direction of the vehicle .

An embodiment of the present invention will be described in detail below with reference to the drawings.
The drawings show the vehicle body lower surface structure, FIG. 1 is a side view of a vehicle having the vehicle body lower surface structure, FIG. 2 is a bottom view of a main part of FIG. 1, FIG. 3 is an enlarged view of the left side of the vehicle in FIG. 2, and FIG. A side view showing the related structure of the floor under cover and the arm cover, FIG. 5 is a cross-sectional view taken along the line AA of FIG. 3, and FIG. 6 is an enlarged bottom surface of a main part showing the flow of the underfloor running wind of this embodiment. FIG. 7A is a bottom perspective view showing the flow of the underfloor running wind of this embodiment, and FIG. 7B is a bottom perspective view showing the flow of the underfloor running wind of the comparative example.

As shown in FIG. 1, on the side of the vehicle body, as a front door 2 as a side door that opens and closes the front door opening 1 at the front of the vehicle and as a side door that closes the rear door opening 3 at the rear of the vehicle so as to open and close. The rear door 4 is provided.
The front door 2 described above includes a door outer handle 5, and similarly, the rear door 4 described above also includes a door outer handle 6.

As shown in FIG. 1, a front fender panel 7 that covers the side of the engine room is provided at the front portion of the front door 2 described above, and is located at the lower portion of the front fender panel 7 corresponding to the position of the front wheel 8. The front wheel house 9 is integrally provided.

As shown in FIG. 1, a rear fender panel 10 that covers the side of the luggage compartment is provided at the rear portion of the rear door 4 described above, and a rear wheel wheel is provided at the lower portion of the rear fender panel 10 corresponding to the position of the rear wheel 11. The house 12 is integrally provided.
In FIG. 1, 13 is a door mirror, and 14 is a rear bumper face formed so as to wrap around from the rear portion of the vehicle to the left and right vehicle side portions.

As shown in FIG. 2, a side sill 15 extending the lower part of the passenger compartment in the front-rear direction of the vehicle is provided between the lower end of the rear edge of the front wheel house 9 and the lower end of the front edge of the rear wheel house 12.
The side sill 15 is a vehicle body strength member having a side sill closed cross section extending in the front-rear direction of the vehicle by joining and fixing the side sill outer and the side sill inner 15A.

As shown in FIG. 2, the pair of left and right side sills 15 and 15 are provided with resin garnishes 16 and 16 provided so as to cover the side sills 15 between the front and rear wheel houses 9 and 12.

A tire deflector 17 is provided at the rear end of the garnish 16 so as to face the front of the rear wheel 11 in the rear wheel house 12, and the side flow flowing on the side of the vehicle body flows into the rear wheel house 12. It is configured so that the side flow is once directed to the outside of the vehicle and then deflected so as to reattach to the outer surface of the tire wheel so as not to enter.

Here, as shown in FIG. 5, the above-mentioned rear wheel wheel house 12 is formed by joining and fixing the wheel house outer 12A and the wheel house inner 12B, and the rear wheel 11 of the rear wheel house 12 is formed. A wheel house mudguard 12C is arranged on the surface facing the surface.

As shown in FIG. 5, the floor panel 18 forming the passenger compartment and the bottom surface of the luggage compartment is formed by continuously forming a front floor panel, a rear seat pan, and a rear floor panel including a luggage compartment recess in the front-rear direction of the vehicle. be.

As shown in FIG. 2, the above-mentioned side sill 15 extending in the front-rear direction of the vehicle from the above-mentioned front floor panel to the middle portion in the front-rear direction of the rear seat pan is joined and fixed to the side portion in the vehicle width direction of the floor panel 18.

As shown in FIGS. 2 and 5, a rear side frame 19 extending in the front-rear direction of the vehicle is provided from the middle portion in the front-rear direction of the above-mentioned rear seat pan to the rear end of the rear floor panel. As shown in FIG. 5, the rear side frame 19 includes a rear side frame upper 20 and a rear side frame lower 21, and between the rear side frame upper 20 and the rear side frame lower 21, the rear side frame lower 21 is located in the front-rear direction of the vehicle. An extended rear side frame closed cross section S1 is formed.

As shown in FIG. 2, at a position corresponding to the rear of the center of the rear wheels 11 and 11, a rear cross member 22 extending in the vehicle width direction is laid horizontally between the pair of left and right rear side frames 19 and 19. A pair of left and right rear side frame lowers 21 and 21 are connected by a cross member 22 in the vehicle width direction.

On the other hand, as shown in FIG. 2, an exhaust pipe 30 (so-called exhaust pipe) for guiding the exhaust gas discharged from the exhaust port of the engine and the exhaust manifold to the rear of the vehicle is provided in the tunnel portion at the lower part of the floor. A catalytic converter 31 is interposed in the exhaust pipe 30, and a silencer 32 as a silencer is communicated and connected to the rear end of the exhaust pipe 30 extending to the rear position of the rear cross member 22. On both the left and right sides, tail pipes 33 and 33 having an L-shaped bottom view extending to the rear of the vehicle after extending outward in the vehicle width direction are attached.
Then, a cover 34 for rectification covers the outside of the silencer 32 outside in the front vehicle width direction and the corner portion of the tail pipe 33 from below.

As shown in FIG. 2, floor under covers 35 and 36 for rectification are provided to cover the lower surface of the vehicle body except for the tunnel portion. Each of the pair of left and right floor undercovers 35 and 36 has a flat rectifying surface on the bottom surface thereof.
Further, these floor undercovers 35 and 36 are formed so that the front floor undercover 35 and the rear floor undercover 36 are continuous in the front-rear direction of the vehicle.

As shown in FIG. 2, a torsion beam type rear suspension 40 for suspending a pair of left and right rear wheels 11 and 11 is provided.
The rear suspension 40 includes a pair of left and right trailing arms 41, 41 extending in the front-rear direction of the vehicle, and a torsion beam 42 (twisting bar spring) connecting the trailing arms 41, 41 extending in the vehicle width direction. I have.

As shown in FIG. 5, the above-mentioned torsion beam 42 is formed in an internal hollow closed cross-sectional structure.
Further, as shown in the figure, the trailing arm 41 described above is formed into a closed cross-sectional structure by joining and fixing the trailing arm outer 43 and the trailing arm inner 44.

A lower spring seat (not shown) joined and fixed to both the inside of the trailing arm 41 in the vehicle width direction and the rear surface portion of the torsion beam 42, and an upper portion attached and fixed to the lower surface of the rear side frame lower 21 in the rear side frame 19. A coil spring 46 as a suspension spring is stretched between the spring seat 45 and the spring seat 45.

Further, as shown in FIGS. 4 and 5, a damper 47 is located between the rear end side upper portion of the trailing arm 41 and the vehicle body side (damper mounting portion of the wheel arch upper portion in the rear wheel wheel house 12). Is stretched.

As shown in FIGS. 2 and 3, a plate-shaped rectifying arm cover 50 that covers the trailing arm 41 from below is attached to the lower portion of the trailing arm 41 when viewed from the bottom of the vehicle body.
Here, the floor under covers 35 and 36 described above are covers for rectification that cover the lower surface of the vehicle body from below in front of the rear suspension 40.

As shown in FIGS. 5, 6, and 7 (a), the above-mentioned arm cover 50 uses mounting members such as bolts 51, 52, and 53 and a bracket to form a lower surface or a lower spring of the trailing arm 41. It is attached to the lower surface of the seat, and the arm cover 50 is configured to be displaced together with the trailing arm 41.

The above-mentioned bolt 51 is located outside the front vehicle width direction of the arm cover 50, the bolt 52 is located at the middle portion in the front-rear direction and inside the vehicle width direction of the arm cover 50, and the bolt 53 is located in the rear vehicle width direction of the arm cover 50. Located on the outside.

As shown in FIGS. 6 and 7A, when the above-mentioned bolts 51, 52, 53 are used as the mounting member, the head of each of these bolts 51, 52, 53 is the lower surface of the arm cover 50, that is, The bolts 51, 52, 53 are formed in the recesses 54, 55, 56 which are recessed upward so as not to project downward from the straightening surface.
On the other hand, the rear wheel 11 described above includes a rim 11R and a tire 11T as shown in FIG.

As shown in FIGS. 3, 6, and 7 (a), the above-mentioned arm cover 50 includes an arm cover expansion portion 50A whose outer edge in the vehicle width direction enters the rim 11R of the rear wheel 11 when viewed from the lower surface of the vehicle body. There is.

As shown in FIG. 6, in this embodiment, the above-mentioned arm cover enlarged portion 50A penetrates into the rim 11R to a position where it becomes about 18 to 20% of the rim width, but the amount of penetration is limited to the above numerical value. It's not something.

As a result, as shown in FIG. 7A, the above-mentioned arm cover 50 blocks the underfloor traveling wind (see the thick arrow in the figure) from rising into the rear wheel house 12 and also blocks it. After reattaching to the arm cover 50, it moves rearward along the arm cover 50 and tries to rise and enter the rear wheel 11 (particularly, its rim 11R) from the outer edge of the arm cover 50 in the vehicle width direction. The flow is suppressed by the above-mentioned arm cover expansion portion 50A, and the flow is suppressed from entering the rear wheel 11, so that the turbulence of the rear flow of the vehicle body is suppressed.

FIG. 7B is a bottom perspective view showing the flow of the underfloor running wind of the comparative example, and is designated with the same reference numerals as those of the embodiment shown in FIG. 7A for convenience of explanation. Further, in FIG. 7A, the virtual lines β1 and β2 show the shape of the comparative example (see FIG. 7B), and in FIG. 7B, the virtual lines α1 and α2 are examples (FIG. 7). (A) shows the shape (see).

In contrast to the configuration of the embodiment shown in FIG. 7A, when the arm cover expansion portion 50A does not exist in the arm cover 50 as shown in the comparative example in FIG. 7B, the figure shows the same. As shown by the thick arrow, the underfloor running wind flowing along the arm cover 50 is sucked out by the side flow of the vehicle body having a high flow velocity . There is a flow that rises and enters inside. On the other hand, in the embodiment shown in FIG. 7A, the flow of the arm cover 50 rising from the outer edge in the vehicle width direction into the rear wheel 11 and entering the rear wheel 11 can be suppressed by the above-mentioned arm cover expanding portion 50A. It can be done.

As shown in FIG. 5, the arm cover enlarged portion 50A of the above-mentioned arm cover 50 projects outward in the vehicle width direction from the trailing arm outer 43 of the trailing arm 41 when viewed from the lower surface of the vehicle body.

As shown in FIG. 6, the rear end portion 36a of the floor under cover 36 located in front faces the leading edge 50a of the arm cover enlarged portion 50A of the arm cover 50 at a position substantially matching in the vehicle front-rear direction. A floor undercover enlarged portion 36A is formed on the floor undercover 36 so as to be close to each other.

The gap between the underfloor and the rear wheel house 12 (that is, the inner edge of the tire 11T of the rear wheel 11) is provided by both the enlarged portion 50A of the arm cover expanding portion 50A of the arm cover 50 and the enlarged portion 36A of the floor under cover. , The gap between the rear end 36a of the floor undercover 36 and the front end 51a of the arm cover 50) is reduced to prevent underfloor running wind from entering the rear wheel house 12. It is configured to suppress the turbulence of the wake of the vehicle body.

Further, as shown in the bottom view of FIG. 6, the rear end side 36b of the floor under cover 36 and the front end side 50b of the arm cover 50 are opposed to each other and are parallel to each other in the bottom view of the vehicle body. The rear end vehicle outer outer edge 36c in the enlarged portion 36A of the floor undercover 36 and the front end vehicle outer outer edge 50c of the arm cover enlarged portion 50A of the arm cover 50 are arranged close to each other on the tire 11T of the rear wheel 11. It is formed so as to be continuous in the front-rear direction of the vehicle by bypassing the inner side surface of the front portion of the tire 11T of the rear wheel 11 with an envelope (envelope, tire operating range).

As a result, the underfloor traveling wind passing along the lower surface of the floor undercover 36 rises and flows into the wheel house 12 after the floor undercover 36 is finished, so that the floor undercover 36 and the arm cover 50 can be used. It is configured to prevent by the cooperation of.

As shown in FIGS. 5 and 6, the arm cover enlarged portion 50A of the above-mentioned arm cover 50 projects toward the rim 11R side of the rear wheel 11 from the vehicle outer end portion of the trailing arm outer 43 of the trailing arm 41. In addition to being configured in a cantilever shape, at least the outer edge of the arm cover enlarged portion 50A in the vehicle width direction is provided with a vertical wall portion 50d extending upward.

In this embodiment, as shown in FIG. 5, a vertical wall portion 50e extending upward is also provided on the inner edge of the arm cover 50 in the vehicle width direction. Here, the above-mentioned arm cover 50 is formed of a synthetic resin such as polypropylene, and the above-mentioned vertical wall portions 50d and 50e are integrally formed with the arm cover main body.
As a result, even if the arm cover enlarged portion 50A of the arm cover 50 has a cantilever structure, the vertical wall portion 50d is configured to secure the strength of the arm cover 50.

In the figure, 60 is a rear under cover for rectifying between the bottom surface of the silencer 32 and the bottom surface of the rear bumper face 14, 61 is a fuel tank, and 62 is interposed between the silencer 32 and the floor panel 18 side. It is an insulator for preventing heat damage.
Further, in the figure, the arrow F indicates the front of the vehicle, the arrow R indicates the rear of the vehicle, the arrow IN indicates the inside in the vehicle width direction, the arrow OUT indicates the outside in the vehicle width direction, and the arrow UP indicates the upper side of the vehicle. Is shown.

Further, in the above embodiment, the structure on the left side of the vehicle is exemplified as the structure on the lower surface of the vehicle body, but the structure on the right side of the vehicle is formed in the same manner as that on the left side of the vehicle.

As described above, the vehicle body lower surface structure of the above embodiment includes a torsion beam type rear suspension 40 including a pair of left and right trailing arms 41, 41 and a torsion beam 42 connecting them, and the vehicle body lower surface is in front of the rear suspension 40. It is a vehicle body lower surface structure to which a floor under cover 36 for rectification is attached to cover the trailing arm 41, and a plate-shaped arm cover 50 for rectification is attached to the lower part of the trailing arm 41 in view of the lower surface of the vehicle body. The cover 50 is provided with an arm cover expansion portion 50A protruding outward in the vehicle width direction from the trailing arm 41 when viewed from the lower surface of the vehicle body, and a floor under cover located in front of the front edge 50a of the arm cover expansion portion 50A. The floor undercover enlarged portion 36A is formed on the floor undercover 36 so that the rear end portions 36a of 36 face each other and approach each other (see FIGS. 2 and 3).

According to this configuration, there is a gap (that is, the inner edge of the tire of the rear wheel 11 and the floor) for communicating the underfloor and the rear wheel house 12 by both the enlarged portion of the arm cover expanding portion 50A and the floor under cover expanding portion 36A. The gap between the rear end portion 36a of the undercover and the front end portion of the arm cover) can be reduced to prevent the underfloor running wind from entering the rear wheel house 12, and as a result, the wake of the vehicle body Disturbance can be suppressed.

In one embodiment of the present invention, the rear end side 36b of the floor undercover 36 and the front end side 50b of the arm cover 50 are arranged in close proximity to each other when viewed from the lower surface of the vehicle body, and the floor undercover enlarged portion is arranged. The vehicle outer outer edge 36c of the 36A and the vehicle outer outer edge 50c of the arm cover expansion portion 50A bypass the front inner side surface of the tire 11T of the rear wheel 11 with an envelope separated from the tire 11T of the rear wheel 11, and the front and rear of the vehicle. It is continuous in the direction (see FIG. 3).

According to this configuration, only the necessary gap remains between the inner edge of the tire 11T of the rear wheel 11, the rear end portion 36a of the floor under cover, and the front end portion of the arm cover, so that the wind passing through the floor under cover is passed through the rear wheel house 12. It is possible to prevent the vehicle from rising inward and entering the vehicle more reliably.

As described above, the present invention includes a torsion beam type rear suspension composed of a pair of left and right trailing arms and a torsion beam connecting them, and a floor undercover for rectification covering the lower surface of the vehicle body is provided in front of the rear suspension. It is useful for the mounted vehicle body underside structure.

11 ... Rear wheel 11T ... Tire 36 ... Floor under cover 36A ... Floor under cover expansion part
36a ... Rear end of floor undercover (rear edge of floor undercover enlargement)
40 ... Rear suspension 41 ... Trailing arm 42 ... Torsion beam 50 ... Arm cover 50A ... Arm cover enlarged part
50a ... Leading edge of arm cover

Claims (2)

It is equipped with a torsion beam type rear suspension consisting of a pair of left and right trailing arms and a torsion beam that connects them.
It is a vehicle body underside structure in which a floor under cover for rectification that covers the underside of the vehicle body is attached to the front of the rear suspension.
A plate-shaped rectifying arm cover that covers the trailing arm from the bottom of the vehicle body is attached to the bottom of the trailing arm.
The arm cover is provided with an arm cover enlargement portion that projects outward in the vehicle width direction from the trailing arm when viewed from the lower surface of the vehicle body.
A floor undercover expansion portion is formed on the floor undercover so that the rear end portions of the floor undercover located in front face each other and approach the front edge of the arm cover expansion portion.
When viewed from the bottom of the vehicle body, the rear end side of the floor under cover and the front end side of the arm cover face each other and are arranged in close proximity to each other.
The outer outer edge of the floor undercover enlargement portion and the outer outer edge of the arm cover enlargement portion are continuous in the front-rear direction of the vehicle, bypassing the front inner side surface of the rear wheel tire with an envelope separated from the rear wheel tire. The lower surface structure of the car body is characterized by this. It is equipped with a torsion beam type rear suspension consisting of a pair of left and right trailing arms and a torsion beam that connects them.
It is a vehicle body underside structure in which a floor under cover for rectification that covers the underside of the vehicle body is attached to the front of the rear suspension.
A plate-shaped rectifying arm cover that covers the trailing arm from the bottom of the vehicle body is attached to the bottom of the trailing arm.
The arm cover is provided with an arm cover enlargement portion that projects outward in the vehicle width direction from the trailing arm when viewed from the lower surface of the vehicle body.
A floor undercover expansion portion is formed on the floor undercover so that the rear end portions of the floor undercover located in front face each other and approach the front edge of the arm cover expansion portion.
The outer end portion of the front edge of the arm cover in the vehicle width direction and the outer end portion of the trailing edge of the floor under cover enlarged portion in the vehicle width direction are at the same position in the vehicle width direction.
Body underside structure.

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