JP6631466B2 - Vehicle undercarriage - Google Patents

Description

  The present invention relates to a vehicle lower structure.

  Patent Document 1 discloses a frame vehicle that extends in the vehicle front-rear direction and forms a frame (chassis frame) by joining an outer panel and an inner panel each having a substantially U-shaped cross section. In this structure, the cross section of the frame has a closed cross section on the front side in the vehicle front-rear direction, and has an open cross section on the rear side in the vehicle front-rear direction. As a structure for discharging water to the outside of the vehicle by a guide member provided on the upper surface of the rocker, there is one described in Patent Document 2. Patent Document 3 discloses a structure in which a lid member is provided on a closed cross section of a rear portion of a frame at a joint portion with a bumper reinforcement at a rear portion of the frame to prevent water from entering.

JP 2002-012164 A JP 2003-327166 A JP 05-338508 A

  In the structure described in Patent Document 1, water and mud easily pass through the inside of the frame from the side of the open cross section behind the vehicle and enter the closed cross section. Further, in order to improve the rigidity of the cross section of the frame, for example, when a flange extending in the vehicle vertical direction is provided at the end of the substantially U-shaped panel, water easily accumulates inside the flange, and the above problem is more remarkable. become.

  In consideration of the above facts, the present invention suppresses foreign matter from entering the closed cross section from the open cross section of the frame, and efficiently discharges foreign substances from within the cross section of the open cross section of the frame. The purpose is to obtain

The vehicle lower structure according to the first aspect extends in the vehicle front-rear direction and has a closed cross-section formed by joining an inner panel and an outer panel to at least a part of one side in the vehicle front-rear direction. A side rail in which at least a part of the other side of the direction is formed with an open cross-section where either one of the inner panel and the outer panel opens in the vehicle width direction, provided on the open cross-section of the side rail; An opening side in the vehicle width direction is provided at a boundary between the closed cross section and the open cross section of the side rail, and a flange section extending upward from a lower portion in the vehicle vertical direction, and the closed cross section is provided from the side of the open cross section. A cover for suppressing intrusion of foreign matter into the side of the vehicle, and an opening formed in the cover, wherein the opening in the vehicle width direction of the open cross section is inclined so as to be located below the vehicle in the vertical direction. It has a Ido section.

According to the vehicle lower structure according to the first aspect , the side rail has a closed cross-section formed by joining the inner panel and the outer panel to at least a part of one side in the vehicle front-rear direction. An open cross section is formed on at least a part of the other side, in which one of the inner panel and the outer panel is open in the vehicle width direction. An open cross section of the side rail is provided with a flange portion whose opening side in the vehicle width direction extends upward from a lower portion in the vehicle vertical direction. Further, a cover is provided at a boundary between the closed cross section and the open cross section of the side rail, and foreign matter (water, sand, mud, dust, etc.) from the open cross section to the closed cross section is provided by the cover. Etc.) are suppressed. Further, the cover is formed with a guide portion that is inclined such that the opening side in the vehicle width direction of the open cross-section portion is located below the vehicle vertical direction. Therefore, even if foreign matter enters the cross section of the open section, the foreign matter is easily discharged to the outside from the opening side in the vehicle width direction along the inclination of the guide portion.

  ADVANTAGE OF THE INVENTION According to the vehicle lower part structure which concerns on this invention, invasion of a foreign material from an open cross-section part of a frame to a closed cross-section part can be suppressed, and a foreign substance can be efficiently discharged from the cross section of the open cross-section part of a frame.

1 is a perspective view showing a vehicle lower structure according to one embodiment when viewed from a vehicle rear side. It is a rear view showing the vehicle lower part structure concerning one embodiment. It is a perspective view showing a cover used for a vehicle understructure concerning one embodiment. FIG. 7 is a perspective view illustrating a vehicle lower structure according to a comparative example as viewed from a vehicle rear side.

  Hereinafter, an embodiment of a vehicle lower structure according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates a front side of the vehicle, an arrow UP indicates an upper side of the vehicle, and an arrow IN indicates an inner side in the vehicle width direction. Further, in the following description, when using the front-rear, up-down, left-right directions without special mention, the left-right direction in the vehicle left-right direction (vehicle width direction) when facing the front-back direction, the vehicle up-down direction, and the front direction Shall be shown.

  FIG. 1 is a perspective view of a lower portion 13 of a vehicle (vehicle with a frame) 12 to which the vehicle lower structure S10 according to the present embodiment is applied, as viewed from the vehicle rear side. FIG. 2 shows a rear view of a lower portion 13 of a vehicle (vehicle with a frame) 12 to which the vehicle lower structure S10 is applied. As shown in FIGS. 1 and 2, a lower rail 13 of the vehicle 12 is provided with a side rail 14 extending in the vehicle front-rear direction. Although not shown, the side rails 14 are disposed so as to form a pair on the left and right sides of the lower portion 13 of the vehicle 12 in the width direction, and a plurality of cross members are provided between the pair of left and right side rails 14. It is spanned across the width.

  The side rails 14 each include an outer panel 20 that forms an outer portion in the vehicle width direction, and an inner panel 22 that is arranged inside the outer panel 20 in the vehicle width direction and forms an inner portion in the vehicle width direction. The outer panel 20 is disposed on the outer portion of the side rail 14 in the vehicle width direction along the vehicle front-rear direction. As shown in FIG. 1, the inner panel 22 is at least a part of the inner portion of the side rail 14 in the vehicle width direction in the vehicle front-rear direction (in the present embodiment, the front side of the side rail 14 in FIG. 1 in the vehicle front-rear direction). Are located in The outer panel 20 and the inner panel 22 are formed of a steel material.

  As shown in FIG. 1, a closed cross section 24 is formed on the side rail 14 by joining the inner panel 22 and the outer panel 20 to the front side in the vehicle front-rear direction. Further, the side rail 14 has an open cross-section 26 that is open in the vehicle width direction on the inner side in the vehicle width direction (that is, on the inner panel 22 side) at the rear side in the vehicle front-rear direction. In other words, in the open section 26 of the side rail 14, only the outer panel 20 is arranged, and the inner panel 22 is not arranged. In the present embodiment, the side rail 14 has a closed cross-section 24 formed at least partially on the front side as one side in the vehicle front-rear direction, and at least partly on the rear side as the other side in the vehicle front-rear direction. An open cross-section 26 is formed at the bottom.

  As shown in FIGS. 1 and 2, the outer panel 20 has a substantially U-shaped cross section when cut along the vehicle width direction and opens inward in the vehicle width direction. More specifically, the outer panel 20 includes a vertical wall portion 20A disposed substantially along the vehicle vertical direction on the outer side in the vehicle width direction, and an upper wall portion extending substantially inward in the vehicle width direction from the upper end of the vertical wall portion 20A. 20B, and a lower wall 20C extending substantially inward in the vehicle width direction from the lower end of the vertical wall 20A. Further, the outer panel 20 includes a flange portion 20D extending upward from the vehicle width direction inner end of the lower wall portion 20C as a lower portion and a vehicle vertical direction from the vehicle width direction inner end of the upper wall portion 20B. And a flange portion 20E extending downward.

  The inner panel 22 has a substantially U-shaped cross-section when cut along the vehicle width direction and opens outward in the vehicle width direction. More specifically, the inner panel 22 includes a vertical wall portion 22A disposed substantially inward in the vehicle width direction along the vehicle vertical direction, and an upper wall extending substantially outward from the upper end of the vertical wall portion 22A in the vehicle width direction. A lower wall portion 22C (see FIG. 2) extending substantially outward in the vehicle width direction from a lower end portion of the vertical wall portion 22A.

  The lower wall 22C of the inner panel 22 is overlapped with the lower surface of the lower wall 20C of the outer panel 20, and the lower wall 22C of the inner panel 22 and the lower wall 20C of the outer panel 20 are joined by welding ( (See FIG. 2). The upper wall portion 22B of the inner panel 22 is overlapped on the upper surface of the upper wall portion 20B of the outer panel 20, and the upper wall portion 22B of the inner panel 22 and the upper wall portion 20B of the outer panel 20 are joined by welding. I have. As a result, a substantially rectangular closed section 24 is formed on the front side of the side rail 14 in the vehicle front-rear direction (see FIG. 1). In the present embodiment, the size of the inner panel 22 in the vehicle width direction gradually increases toward the front side in the vehicle front-rear direction, but the shape of the inner panel 22 is not limited to this configuration.

  As shown in FIG. 1, the closed section 24 of the side rail 14 is formed up to the position of the rear end 28 of the inner panel 22 in the vehicle longitudinal direction. The inner panel 22 is not disposed on the rear side of the closed cross-section 24 of the side rail 14 in the vehicle front-rear direction, as described above, and is an open cross-section 26. As described above, only the outer panel 20 is disposed in the open section 26, and the inner side in the vehicle width direction is an opening. The open section 26 is provided with a flange portion 20D extending upward from a lower wall portion 20C on the opening side of the outer panel 20, and a flange portion 20E extending downward from an upper wall portion 20B on the opening side of the outer panel 20. Is provided.

  A bracket 44 is provided on the side rail 14 (the front side in the vehicle front-rear direction in FIG. 1) so as to project outward in the vehicle width direction. A cab mount (not shown) is attached to the bracket 44, and a cab (body) (not shown) can be connected to the side rail 14 via the cab mount and the bracket 44.

  As shown in FIGS. 1 and 2, at a boundary between the closed cross-section 24 and the open cross-section 26 of the side rail 14, at least a portion of the closed cross-section 24 is disposed so as to straddle the cross-section of the side rail 14. A fishtail cover (hereinafter, referred to as a “cover”) 30 is provided as a cover for closing the lower side. In the present embodiment, a gap is formed between the upper portion of the cover 30 and the upper wall portion 20B of the outer panel 20. As shown in FIGS. 1 to 3, the cover 30 is disposed substantially in the vehicle width direction and has a substantially C-shaped wall portion 30A when viewed from the side of the vehicle, and a vehicle width direction outer side of the wall portion 30A. An outer wall portion 30B extending substantially in the vehicle vertical direction and substantially the vehicle rear side from the end portion, and an inner wall portion 30C bent along the inner wall surface of the inner panel 22 from a vehicle width direction inner end portion of the wall portion 30A; It has. Since the cover 30 is provided at the boundary between the closed section 24 and the open section 26 of the side rail 14, water, sand, mud, garbage, and the like from the side of the open section 26 to the side of the closed section 24 are provided. Foreign matter is prevented from entering.

  The wall 30A of the cover 30 has a shape that is recessed toward the front of the vehicle. More specifically, the wall portion 30A includes a vertical wall portion 32A disposed substantially in the vehicle vertical direction at an intermediate portion in the vehicle vertical direction, and a vehicle rearward diagonally lower side from the lower end portion of the vertical wall portion 32A and the vehicle. And a guide portion 32B extending rearward. Further, the wall portion 30A includes a lower wall portion 32C which is disposed outside the flange portion 20D in the vehicle width direction and extends substantially obliquely downward and rearward from the rear end of the guide portion 32B (see FIG. 1). . Further, the wall portion 30A includes an upper side wall portion 32D extending substantially obliquely rearward and rearward from the upper end of the vertical wall portion 32A.

  In the present embodiment, the guide portion 32B extends substantially obliquely downward from the lower end of the vertical wall portion 32A to the rear of the vehicle, and extends substantially rearward from the rear end of the first guide portion 32BA. A second guide portion 32BB. The first guide portion 32BA is positioned such that the inner side in the vehicle width direction (the opening side in the vehicle width direction of the open cross-section portion 26) is lower than the outer side in the vehicle width direction in the cross section along the vehicle width direction. The inclined surface is inclined so that For example, the inclined surface on the upper side of the first guide portion 32BA has an angle θ with respect to the imaginary plane in the horizontal direction, and is arranged so as to have a downward slope inward in the vehicle width direction (FIG. 2). As a result, foreign substances such as water, sand, mud, and dirt flow inward in the vehicle width direction through the first guide portion 32BA, and are discharged to the outside from the opening side.

  The outer portion in the vehicle width direction of the second guide portion 32BB is arranged substantially horizontally along the vehicle width direction. Further, a curved surface that curves toward the vehicle lower side is formed at an inner end of the second guide portion 32BB in the vehicle width direction. As a result, foreign substances such as water, sand, mud, and dirt are discharged to the outside by the curved surface of the inner end (opening side) of the second guide portion 32BB in the vehicle width direction.

  The lower wall portion 32C of the cover 30 is formed so as to be inclined downward from the rear end of the second guide portion 32BB toward the vehicle rear side. The rear end (lower end) of the lower side wall 32C is in contact with the lower wall 20C of the outer panel 20 via a seal member 36 (see FIG. 2) described later. A flange portion 20D is inserted between the lower wall portion 32C and the inner wall portion 30C of the cover 30 via a seal member 36 (see FIG. 2). The lower side wall portion 32C of the cover 30 is configured to push up foreign matters such as water, sand, mud, and dirt flowing from the side of the open section 26 (rear side of the vehicle) of the side rail 14 to the guide portion 32B (FIG. 1 (see arrow B). The guide portion 32B is disposed closer to the closed cross-section portion 24 than the lower side wall portion 32C, and flows through the first guide portion 32BA of the guide portion 32B inward in the vehicle width direction, so that the foreign material flows from the opening side. It is designed to be discharged outside (see arrow B in FIG. 1).

  The outer wall portion 30B of the cover 30 is formed continuously with the upper wall portion 32D, the vertical wall portion 32A, the guide portion 32B (the first guide portion 32BA and the second guide portion 32BB), and the lower wall portion 32C. ing. The outer wall portion 30B is disposed along the vertical wall portion 20A of the outer panel 20. A seal member 36 is disposed between the cover 30 and the outer panel 20 (see FIG. 2). More specifically, the seal member 36 includes the lower portion of the outer wall portion 30B, the lower wall portion 32C, and the inner wall portion 30C of the cover 30, and the vertical wall portion 20A, the lower wall portion 20C, and the flange portion 20D of the outer panel 20. (See FIG. 2). The rear end of the seal member 36 is cut along the rear end edges of the outer wall 30B and the lower wall 32C of the cover 30. The seal member 36 seals the space between the cover 30 and the lower wall portion 20C, the flange portion 20D, and the vertical wall portion 20A of the outer panel 20, so that foreign matters such as water and mud are removed from the wall surface of the cover 30 and the wall surface of the outer panel 20. Between the closed section 24 side.

  The inner wall portion 30C of the cover 30 is disposed substantially inside the inner panel 22 in the vehicle width direction. The inner wall part 30C of the cover 30 is formed continuously with the upper wall part 32D, the vertical wall part 32A, the guide part 32B (the first guide part 32BA and the second guide part 32BB), and the lower wall part 32C. ing. When viewed from the rear side of the vehicle, the inner wall portion 30C has a shape that is bent stepwise toward the inside in the vehicle width direction. In other words, when viewed from the rear side of the vehicle, the inner wall portion 30C includes a step portion whose height decreases stepwise (in this embodiment, a step portion whose height decreases by one step). At an intermediate portion of the inner wall portion 30C in the vehicle vertical direction, a convex portion 34A protruding toward the vehicle front side is provided, and a through hole 40 (FIG. 3) through which the bolt 38 is inserted into the convex portion 34A. Reference) is formed.

  Although not shown, the rear end portion 28 of the vertical wall portion 22A of the inner panel 22 has a shape cut out concavely on the front side in the vehicle front-rear direction along the shape of the wall portion 30A of the cover 30. The wall portion 30A of the cover 30 is disposed in a cross section of the side rail 14 on the vehicle rear side of the vertical wall portion 22A of the inner panel 22. Further, the outer wall portion 30B of the cover 30 is superimposed on the inner surface of the vertical wall portion 20A of the outer panel 20 via the sealing member 36, and the inner wall portion 30C of the cover 30 is superimposed on the vertical wall portion 22A of the inner panel 22. Have been. In this state, the bolt 38 is inserted into the through-hole 40 (see FIG. 3) from the inner wall portion 30C side, and is screwed into a weld nut (not shown) from the vertical wall portion 22A side of the inner panel 22 to cover. 30 is fixed to the side rail 14. Further, the seal member 36 may be bonded to the cover 30 by bonding or the like, or the seal member 36 may be bonded to the outer panel 20 by bonding or the like.

  Next, the operation and effect of the vehicle lower structure S10 of the present embodiment will be described.

  As shown in FIGS. 1 and 2, in the vehicle lower part structure S <b> 10, a side rail 14 extending along the vehicle front-rear direction is provided. A closed cross section 24 is formed on the side rail 14 by joining the inner panel 22 and the outer panel 20 to at least a part of the front side in the vehicle longitudinal direction. In the side rail 14, an open cross-section 26 is formed on at least a part of the rear side in the vehicle front-rear direction so that the inner side in the vehicle width direction (the side of the inner panel 22) opens in the vehicle width direction. The open section 26 of the side rail 14 has a flange portion 20D formed on the inner side (opening side) in the vehicle width direction and extending upward from the vehicle width direction inner end of the lower wall portion 20C in the vehicle vertical direction. I have. A cover 30 is provided at a boundary between the closed section 24 and the open section 26 of the side rail 14. In the vehicle lower part structure S10, the cover 30 prevents foreign matter such as water, sand, mud, and dust from entering from the side of the open section 26 to the side of the closed section 24.

  Further, the cover 30 is formed with a first guide portion 32BA that is inclined such that the opening side (the inner side in the vehicle width direction) of the open cross section 26 in the vehicle width direction is located on the lower side in the vehicle vertical direction. As a result, as shown by an arrow A in FIG. 1, foreign matter that has entered the cross section of the open section 26 due to scattering of foreign matter such as water or mud causes the first guide portion 32BA of the guide portion 32B to tilt. As a result, it is discharged to the outside from the opening side in the vehicle width direction. Further, as shown by an arrow B in FIG. 1, foreign matter such as water or mud from the rear of the vehicle is pushed up along the lower side wall portion 32C when the vehicle 12 leans forward or suddenly brakes. It moves to the first guide portion 32BA of the guide portion 32B on the front side of the vehicle. Accordingly, the foreign matter is discharged to the outside from the opening side in the vehicle width direction along the inclination of the first guide portion 32BA. Therefore, even when the flow rate of the foreign matter increases, the foreign matter is smoothly discharged to the outside along the inclination of the first guide portion 32BA. Also, in the second guide portion 32BB, a curved surface whose height is reduced toward the inside in the vehicle width direction is formed at the inside end portion in the vehicle width direction, so the inside end of the second guide portion 32BB in the vehicle width direction. Foreign matter is easily discharged to the outside from the part.

  For this reason, according to the vehicle lower part structure S10, the cover 30 prevents foreign substances from entering the closed cross-sectional portion 24 from the open cross-sectional portion 26 of the side rail 14 and prevents the foreign matter from entering the cross-section of the open cross-sectional portion 26 of the side rail 14. Foreign matter can be efficiently discharged.

  FIG. 4 is a perspective view showing a vehicle lower structure S100 of a comparative example. In the vehicle lower part structure S100, a side rail 104 extending in the vehicle front-rear direction is provided. The side rail 104 includes an outer panel 110 forming an outer portion in the vehicle width direction, and an inner panel 112 disposed inside the outer panel 110 in the vehicle width direction and forming an inner portion in the vehicle width direction. The outer panel 110 is arranged on the outer side of the side rail 104 in the vehicle width direction along the vehicle front-rear direction. The inner panel 112 is disposed on the front side in the vehicle front-rear direction of the inner portion of the side rail 104 in the vehicle width direction.

  A closed cross section 114 is formed on the side rail 104 by joining the inner panel 112 and the outer panel 110 to the front side in the vehicle front-rear direction. Further, the side rail 104 has an open cross-section 116 that is open in the vehicle width direction on the inner side in the vehicle width direction (on the side of the inner panel 112) at the rear side in the vehicle front-rear direction. That is, only the outer panel 110 is provided in the open cross section 116 of the side rail 104, and the inner panel 112 is not provided. The outer panel 110 includes a vertical wall 20A, an upper wall 20B, a lower wall 20C, a lower flange 20D, and an upper flange 20E. The inner panel 112 includes a vertical wall portion 22A, an upper wall portion 22B, and a lower wall portion 22C. At the rear end of the vertical wall portion 22A of the inner panel 112, a notch portion 112A is formed in which an intermediate portion in the vehicle vertical direction is notched in a concave shape toward the front side of the vehicle.

  The vehicle lower structure S100 is different from the vehicle lower structure S10 of the present embodiment in that no cover is provided at the boundary between the closed section 114 and the open section 116 of the side rail 104.

  In the above-described vehicle lower part structure S100, when foreign matter such as water, sand, mud, and dirt enters the open cross-section 116 of the side rail 104 (the cross-section of the outer panel 110) from the inside (opening side) in the vehicle width direction, the opening is started. Foreign matter easily enters the closed cross section 114 from the cross section 116. In particular, since the outer panel 110 is provided with the flange portion 20D extending upward from the inner side in the vehicle width direction of the lower wall portion 20C, foreign matter easily accumulates inside the flange portion 20D of the outer panel 110. Foreign matter that has entered the inside of the portion 20D is less likely to be discharged to the outside.

  On the other hand, in the vehicle lower part structure S10 of the present embodiment, the cover 30 is provided at the boundary between the closed section 24 and the open section 26 of the side rail 14, and the cover 30 allows the side rail 14 to extend from the side of the open section 26. Intrusion of foreign matter into the closed section 24 is suppressed.

  Further, the cover 30 is formed with a first guide portion 32BA that is inclined such that the opening side in the vehicle width direction of the open cross-section portion 26 is located on the lower side in the vehicle vertical direction. As a result, as shown by an arrow A in FIG. 1, foreign matter such as water or mud scatters, and foreign matter that has entered the cross section of the open section 26 travels along the inclination of the first guide portion 32BA to be in the vehicle width. From the opening side in the direction. Further, as shown by an arrow B in FIG. 1, foreign matter such as water and mud from the rear of the vehicle is pushed up along the lower side wall 32C when the vehicle 12 is tilted forward or when the vehicle is suddenly braked. It moves to the 1st guide part 32BA of the vehicle front side. Accordingly, the foreign matter is discharged to the outside from the opening side in the vehicle width direction along the inclination of the first guide portion 32BA.

  In the above embodiment, the closed section 24 is formed on the front side of the side rail 14 in the vehicle front-rear direction, and the open section 26 is formed on the rear side of the side rail 14 in the vehicle front-rear direction. The cover 30 is provided at the boundary between the closed cross-section 24 and the open cross-section 26, but the present invention is not limited to this configuration. For example, a closed cross-section is formed on the rear side of the side rail in the vehicle front-rear direction, and an open cross-section is formed on the front side of the side rail in the front-rear direction of the vehicle. A configuration in which a cover is provided at the boundary may be used.

  Further, a closed cross-section is formed on at least a part of one side of the side rail in the vehicle front-rear direction, and an open cross-section is formed on at least a part of the other side of the side rail in the vehicle front-rear direction. A configuration in which a cover is provided at the boundary between the cross section and the open cross section may be used. For example, when an open cross section, a closed cross section, and an open cross section are arranged in this order from the front side in the vehicle longitudinal direction of the side rail, the boundary between the open cross section and the closed cross section on the front side, and the closed cross section and the rear A cover may be provided at the boundary with the open section on the side. Also, for example, when the closed cross-section, the open cross-section, and the closed cross-section are arranged in order from the front side in the vehicle longitudinal direction of the side rail, the boundary between the front-side closed cross-section and the open cross-section, and the open cross-section A cover may be provided at the boundary between the rear side and the closed cross section.

  Further, in the above embodiment, the open cross section 26 of the side rail 14 has a shape in which the inner side in the vehicle width direction, that is, the inner panel 22 side is opened, but the present invention is not limited to this configuration. For example, the open cross section of the side rail may have a shape that opens on the outside in the vehicle width direction, that is, on the outer panel side.

  Further, in the above-described embodiment, the cover 30 is formed with the first guide portion 32BA that is inclined such that the opening side in the vehicle width direction of the open cross-section portion 26 is positioned below the vehicle vertical direction. The invention is not limited to this configuration. That is, the position and shape of the guide portion and the inclination angle of the guide portion with respect to the horizontal direction can be changed. Further, the guide section may have a configuration having a plurality of inclined sections having different inclination angles.

  Further, in the above embodiment, the cover 30 is attached to the inner panel 22 of the side rail 14 with the bolt 38 or the like. However, the present invention is not limited to this configuration, and the structure for attaching the cover to the side rail is as follows. Can be changed.

  Although the embodiments of the present invention have been described with reference to the embodiments, these embodiments are merely examples, and various changes can be made without departing from the scope of the invention. The scope of the present invention is not limited to these embodiments, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention.

12 Vehicle 13 Lower part 14 Side rail 20 Outer panel 20D Flange part 22 Inner panel 24 Closed section 26 Open section 30 Cover 32B Guide part 32BA First guide part (guide part)
S10 Vehicle lower structure

Claims (4)

While extending in the vehicle front-rear direction, the inner panel and the outer panel are joined to at least a part of one side in the vehicle front-rear direction to form a closed cross-section, and at least part of the other side in the vehicle front-rear direction is A side rail formed with an open cross-section where one side of the inner panel and the outer panel is opened in the vehicle width direction;
A flange portion provided on the open cross-sectional portion of the side rail, wherein an opening side in the vehicle width direction of the other of the inner panel and the outer panel extends upward from a lower portion in a vehicle vertical direction;
A cover provided at a boundary between the closed cross-section and the open cross-section of the side rail, arranged along the vehicle width direction, and the flange portion being inserted below the vehicle in the vertical direction, a foreign body the cover inhibits the penetration of to the side of the closed-section portion from the side of the open cross section,
A guide portion formed on the cover and extending to the other side in the vehicle front-rear direction, and inclined so that the opening side in the vehicle width direction of the open cross-section portion is located on the lower side in the vehicle vertical direction ;
Vehicle lower structure having a. 2. The vehicle lower structure according to claim 1, wherein the cover is disposed so as to straddle a cross section of the side rail, and closes at least a lower side of the open cross section. 3. The vehicle lower structure according to claim 1, wherein the guide portion is provided above the flange portion. 4. The cover according to claim 1, wherein the cover extends from the rear end of the guide portion to the other side in the vehicle front-rear direction and has a lower wall portion that contacts the side rail via a seal member. 5. 2. The vehicle lower structure according to claim 1.