JP6187489B2 - Lower body structure of the vehicle - Google Patents

Description

  The present invention includes a left and right side sill extending in the vehicle longitudinal direction outside the vehicle width direction of the vehicle body, a floor panel connected to the left and right side sills, a dash panel extending upward from a front portion of the floor panel, The present invention relates to a lower body structure of a vehicle including left and right front side frames extending in a vehicle front-rear direction at a front portion, and a cross member having an end portion coupled to a side sill and extending in a vehicle width direction.

  As a conventional lower body structure of a vehicle, for example, the lower body structure of a vehicle of Patent Document 1 has been proposed for the purpose of achieving a front collision safety performance.

  Patent Document 1 discloses an upper panel member that constitutes a rear portion of a front side member and is joined to an upper surface of a floor panel. The upper panel member extends in the vehicle rearward direction while the rear side of the vehicle body is inclined toward the side sill side, and the rear end thereof is coupled to a cross member (second front floor cross member) extending in the vehicle width direction.

  The vehicle body lower structure disclosed in Patent Document 1 transmits the load at the time of vehicle front impact input from the front end of the front side member from the second front floor cross member to the side sill (rocker) via the upper panel member. It is configured.

  However, as described above, the vehicle body lower structure of Patent Document 1 is configured to transmit the load at the time of vehicle front impact to the rear of the vehicle through a one-way load path along the upper panel member. It must be said that there is room for studying load transmission.

JP 2005-219521 A

  In view of this, an object of the present invention is to improve the load transmission performance by using a plurality of front impact load transmission paths.

The present invention includes left and right side sills extending in the vehicle longitudinal direction outside the vehicle width direction of the vehicle body, a floor panel connected to the left and right side sills, a dash panel extending upward from a front portion of the floor panel, and the dash panel. A vehicle body structure comprising a front and rear left and right front side frames extending in the vehicle front-rear direction and a cross member extending in the vehicle width direction with an end portion coupled to the side sill . It has a floor tunnel that bulges upward in the center, and the cross member is arranged so as to connect the side sill and the floor tunnel, and the cross member of the floor tunnel is connected to the position. the tunnel member for connecting the lower portion of the left and right floor tunnel is arranged, the position of the rear vicinity of the front side frame The front and rear members extending rearward of the vehicle and the front floor inclined member extending obliquely inward in the vehicle width direction from the front portion of the side sill form a substantially V shape in a vehicle plan view. The rear side is arranged near the middle part of the cross member in plan view of the vehicle, and extends rearwardly in the vicinity of the position where the cross member of the floor tunnel is connected to the rear side so as to incline outward in the vehicle width direction. A floor inclined member is provided.

  According to the above configuration, the cross member can receive the front collision load transmitted from the front and rear members and the front floor inclined member, and can also distribute and transmit the received front collision load in the vehicle width direction. Load transmission performance can be improved by using a plurality of impact load transmission paths.

Furthermore, the present invention has a floor tunnel that bulges upward at the center of the floor panel, and the cross member is disposed so as to connect the side sill and the floor tunnel. A tunnel member that connects the left and right lower portions of the floor tunnel is disposed at the position where the cross member is connected, and the rear side of the floor tunnel is positioned in the vehicle width direction behind the position where the cross member of the floor tunnel is connected. A rear floor inclined member that is inclined and extends outward is provided .

  According to the above configuration, since the load is transmitted to the opposite side in the vehicle width direction via the tunnel member, the effect of claim 1 described above, that is, the load dispersion transmission effect in the vehicle width direction can be further enhanced. it can.

  As an aspect of the present invention, the front and rear members extend from the V-shaped top position to the rear of the cross member.

  According to the said structure, the load transmission path | route to a vehicle rear can be increased further, and the effect of Claim 1 mentioned above can be improved further.

  Here, the front floor inclined member and the rear floor inclined member are arranged such that the front floor inclined member is arranged at the lower part of the floor panel and the rear floor inclined member is arranged at the upper part of the floor panel. A configuration in which both the front floor inclined member and the rear floor inclined member are disposed in the lower portion of the floor panel is preferable. However, the present invention is not limited to this configuration, and the front floor inclined member is disposed at the upper portion of the floor panel, and the rear floor inclined member is disposed at the lower portion of the floor panel, or the front floor inclined member and A configuration in which both the rear floor inclined member and the rear panel are disposed on the floor panel may be employed.

  The present invention also includes left and right side sills extending in the vehicle longitudinal direction outside the vehicle width direction of the vehicle body, hinge pillars extending upward from the respective front positions of the left and right side sills, and the vehicle body longitudinally intermediate portions of the left and right side sills. A center pillar extending upward from the position, a floor panel connected to the left and right side sills, a floor tunnel bulging upward at the center of the floor panel, and extending in the vehicle width direction from the side sills to the floor panel A vehicle lower body structure comprising: a connected cross member; and a tunnel member that connects left and right lower portions of the floor tunnel at a position where the cross member of the floor tunnel is connected, the side sill and the Extending from the vicinity of the coupling site with the hinge pillar inclines toward the rear side in the vehicle width direction and contacts the cross member. The front floor inclined member that extends and the rear side of the vicinity of the position where the cross member of the floor tunnel is connected, the rear side extends inclined toward the outside in the vehicle width direction, and is connected to the vicinity of the joint portion between the side sill and the center pillar. And a rear floor inclined member.

  According to the above configuration, it is possible to transmit the front collision load to the opposite side in the vehicle width direction through the front floor inclined member, the tunnel member, and the rear floor inclined member.

  Here, the vicinity of the joint portion between the side sill and the hinge pillar is not limited to the joint portion between the side sill and the hinge pillar, and the front floor inclined member overlaps at least a part of the joint portion in the vehicle longitudinal direction. Thus, it is a part including an aspect connected to a part close to the binding part.

  Further, the vicinity of the joint portion between the side sill and the center pillar is not limited to the joint portion between the side sill and the center pillar, and the rear floor inclined member is provided at least in the vehicle longitudinal direction of the joint portion. It is a site including an aspect of connecting to a site near the binding site so as to overlap.

  According to this invention, a plurality of side front impact load transmission paths can be provided to improve load transmission performance.

The bottom view of the lower body structure of the vehicle of a 1st embodiment. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. No. The perspective view which looked at 2 tunnel members from the lower part. Explanatory drawing at the time of the front collision in the lower vehicle body structure of this vehicle. The bottom view of the lower body structure of the vehicle of a 2nd embodiment. The bottom view of the lower body structure of the vehicle of other embodiments.

An embodiment of the present invention will be described in detail with reference to the drawings.
In the drawing, an arrow (F) indicates the front of the vehicle body, an arrow (U) indicates the upper side of the vehicle body, an arrow (IN) indicates the inside of the vehicle body, and an arrow (OUT) indicates the outside of the vehicle body.

(First embodiment)
As shown in FIG. 1, the vehicle V according to the first embodiment includes a dash panel 1 that partitions an engine room E and a passenger compartment (not shown), and a floor panel 2 that forms the bottom surface of the passenger compartment. The dash panel 1 is disposed so as to rise from the front end of the floor panel 2. The vehicle V includes a pair of side sills 3 and 3 extending in the vehicle front-rear direction on both outer sides of the floor panel 2 in the vehicle width direction.

  The side sill 3 has a predetermined closed cross-sectional structure as shown in FIG. 2, and extends in the vehicle front-rear direction at the edges on both sides in the vehicle width direction of the vehicle V as shown in FIG. A floor panel 2 is connected to the side sills 3 on both sides in the vehicle width direction (see FIGS. 1 and 2). Specifically, the side sill 3 has an inner panel 3n having a U-shaped cross section, and an outer panel 3u. The upper and lower ends of the panels 3n and 3u are joined together to form a closed cross section. The outer end of the floor panel 2 in the vehicle width direction is joined to the lower part of the side wall surface (see FIG. 2).

  As shown in FIG. 2, the vehicle V is provided with a hinge pillar 4 extending upward from the front position of the side sill 3 and a center pillar 5 extending upward from an intermediate position in the front-rear direction of the side sill 3.

  The hinge pillar 4 includes a hinge pillar outer 4u and a hinge pillar inner 4n, has a closed cross section extending in the vertical direction, and is a vehicle body rigid member that supports a front door (not shown) so as to be openable and closable. A hinge pillar reinforcement 4r is provided between the hinge pillar outer 4u and the hinge pillar inner 4n, as needed, between the side rail (not shown) and the side sill 3. 2).

  In addition, the coupling | bond part (the skirt part of the hinge pillar 4) to the side sill 3 of the hinge pillar 4 is formed so that it may have a width | variety in the vehicle rear direction gradually from the front end of the side sill 3 as it progresses to the lower end part of this hinge pillar 4.

The center pillar 5 includes a center pillar outer 5u and a center pillar inner 5n, has a closed cross section extending in the vertical direction, and is a vehicle body rigid member that supports a rear door (not shown) so that it can be opened and closed. 5 is erected and fixed between a roof side rail (not shown) and the side sill 3 (see FIG. 2).
It should be noted that the connecting portion of the center pillar 5 to the side sill 3 (the bottom portion of the center pillar 5) gradually has a width in the vehicle front-rear direction with respect to the substantially middle position of the side sill 3 as it proceeds to the lower end of the center pillar 5. Is formed.

  Further, as shown in FIGS. 1 and 2, the floor panel 2 includes a floor tunnel 8 that extends in the longitudinal direction of the vehicle body and bulges upward (toward the vehicle compartment side), as shown in FIGS. . The front end of the floor tunnel 8 is connected to the dash panel 1.

  In addition, the reinforcement 41 is arrange | positioned so that the floor tunnel 8 may be straddled on the upper part of the connection part of the rear-end part of the dash panel 1 and the front-end part of the floor panel 2 (refer FIG. 1).

  As shown in FIGS. 1 and 2, a pair of left and right tunnel side frames 9, 9 that reinforce the floor tunnel 8 are attached to both edges of the floor tunnel 8 at the lower part of the floor panel 2. Specifically, the tunnel side frames 9 and 9 on both sides in the vehicle width direction extend linearly in the vehicle front-rear direction at the boundary region between the floor panel 2 and the flat portions on both outer sides in the vehicle width direction of the floor tunnel 8. The tunnels 8 are arranged substantially parallel to each other with an interval substantially equal to the dimension in the vehicle width direction of the tunnel 8.

  As shown in FIG. 2, the tunnel side frame 9 has a U-shaped portion 9 a having a substantially U-shape (hat-shaped cross section) with an upper opening in a cross section perpendicular to the vehicle longitudinal direction. The lower surface portion of the floor tunnel 8 is formed from the bottom surface portion 91, the outer surface portion 92, and the inner surface portion 93, and forms the tunnel side frame closed section 9S with the lower surface portion (back surface) of the floor tunnel 8 in detail. Are attached to the lower surface at the boundary between the floor tunnel 8 and the floor panel 2.

  As shown in FIG. 1, rear side frames 14 extending in the vehicle front-rear direction are disposed at both outer ends in the vehicle width direction of the rear portion of the vehicle V.

  As shown in FIG. 1, a torque box 15 extending from the rear to the rear side in the vehicle width direction is disposed at the rear of the front side frame 7 on each side in the vehicle width direction. The torque box 15 is a vehicle body rigidity member that increases the rigidity of the vehicle body, and has an outer end in the vehicle width direction so as to have a closed cross section 15S that effectively transmits the load applied to the front side frame 7 to the side sill 3. It is directly bonded to the side sill 3.

  Furthermore, as shown in FIG. 1, a pair of left and right is located at a position that is substantially parallel to the front side frame 7 in the front portion of the vehicle V in a plan view and that is spaced outward in the vehicle width direction and upward. An apron reinforcement 18 (hereinafter abbreviated as “apron rain 18”) extends in the longitudinal direction of the vehicle body.

  The apron rain 18 is a vehicle body rigid member that has an apron rain closed section that has a rear end joined to an upper end of the hinge pillar 4 and extends in the vehicle front-rear direction.

  Further, as shown in FIG. 1, on both sides in the vehicle width direction of the lower part of the vehicle V, it extends linearly in the vehicle width direction between the side sill 3 and the floor tunnel 8, and extends into the side sill 3 and the floor tunnel 8. No. to connect 2 cross member 35 (front cross member 35), No. 2 2.5 cross member 36 (intermediate cross member 36), and Three cross members 37 (rear side cross members 37) are arranged in this order from the front side to the rear side in the vehicle front-rear direction.

  No. The two cross members 35 are disposed at positions between the hinge pillar 4 and the center pillar 5 in the vehicle longitudinal direction. The 2.5 cross member 36 is disposed at substantially the same position as the center pillar 5 in the vehicle longitudinal direction. The three cross members 37 are disposed at the rear end position of the floor panel 2 and connect the side sill 3 and the floor tunnel 8 (see FIG. 1).

  No. As shown in FIGS. 1 and 2, the two cross member 35 has a U-shaped portion with an upper opening and a flange portion extending from the opening side end to both outer sides in the vehicle width direction. By constructing and joining these flange portions to the lower surface portion of the floor panel 2, a closed cross-section portion 35 </ b> S (hereinafter referred to as “No. 2 cross member closed cross-section portion 35 </ b> S”) is formed between the lower surface portion of the floor panel 2. Is configured.

  On the other hand, no. 2.5 cross member 36, and no. Each of the three cross members 37 has a U-shaped portion having a downward opening and a flange portion extending from the opening-side end portion to both outer sides in the vehicle width direction. It is joined to the upper surface of the. As a result, no. The 2.5 cross member 36 forms a closed cross section 36S (hereinafter referred to as “No. 2.5 cross member closed cross section 36S”) between the top surface of the floor panel 2 and the No. 2.5 cross member 36. The 3 cross member 37 forms a closed cross section 37S (hereinafter referred to as “No. 3 cross men closed cross section 37S”) between the top surface portion of the floor panel 2.

  As shown in FIG. 1, the vehicle V includes a pair of left and right front side frames 7 and 7 that extend in the longitudinal direction of the vehicle body at the side of the engine room E at the front portion of the dash panel 1. The front side frame 7 has a closed cross-sectional structure with a square cross section (not shown). A front end portion of a front / rear member 16 (floor frame 16) that extends rearward of the vehicle at the lower portion of the dash panel 1 is joined to a position near the rear portion of the front side frame 7.

  As shown in FIG. 1, the front and rear members 16 form a closed cross section (hereinafter referred to as “front and rear member closed cross section 16S”) with the lower surface of the floor panel 2, and the rear side vehicle width It is disposed on the lower surface of the floor panel 2 so as to incline outward in the direction and extend in the vehicle front-rear direction. The front and rear members 16 are No. in plan view of the vehicle. 2 is connected to the vicinity of the middle part of the cross member 35.

  Further, as shown in FIGS. 1 and 2, a front floor inclined member 31 extending from the front portion of the side sill 3 to the rear side in the vehicle width direction is disposed at the lower portion of the floor panel 2.

  The rear part of the front floor inclined member 31 is No. 2 is connected to the cross member 35. The front floor inclined member 31 and the front and rear members 16 are substantially V-shaped in a vehicle plan view, and the V-shaped top portion 40 is No. 4 in a vehicle plan view. 2 is disposed in the vicinity of the middle portion of the cross member 35 (see FIG. 1).

  As shown in FIGS. 1 and 2, the front floor inclined member 31 has a closed cross section with the lower surface portion of the floor panel 2 (hereinafter referred to as “front floor inclined member closed cross section 31 </ b> S”). It is composed.

In addition, the floor tunnel 8 No. The lower part of both sides of the floor tunnel 8 in the vehicle width direction is connected to the position where the two cross members 35 are connected, and the load from one side of the vehicle width direction is transferred to the opposite side of the vehicle width direction at the lower part of the floor tunnel 8. Report No. Two tunnel members 20 (front tunnel members 20) are provided.
No. As shown in FIGS. 1 to 3, the two tunnel members 20 are disposed in the lower part of the floor tunnel 8 across the floor tunnel 8 in the floor panel 2 and are connected in the vehicle width direction so as to connect both sides in the vehicle width direction. Has a linear portion 21 extending substantially linearly. 2 cross member 35 and No. 2 The two tunnel members 20 are arranged in a straight line continuous in the vehicle width direction at the same position in the vehicle longitudinal direction.

No. The two tunnel members 20 include a lower panel 23 and an upper panel 24 positioned above the lower panel 23 (see FIG. 2).
No. As shown in FIG. 2, the 2 tunnel member 20 is described above so that a closed cross section 20S (hereinafter referred to as “No. 2 tunnel member closed cross section 20S”) is formed inside the linear portion 21. The upper panel 24 and the lower panel 23 are arranged below the floor tunnel 8 with the upper and lower sides facing each other.

  No. As shown in FIGS. 1 and 3, the two tunnel members 20 are fastened by bolts B and nuts N to both outer edges of the floor tunnel 8 in the vehicle width direction of the floor panel 2, and to both the front and rear sides.

  These fastening portions 25 include an outer fastening portion 25u fastened to the bottom surface portion 91 of the tunnel side frame 9 at both outer edges in the vehicle width direction and at both front and rear sides, and on the inner side in the vehicle width direction from the outer fastening portion 25u. And a pair of inner fastening portions 25n fastened to the floor tunnel 8 (see the figure).

  The pair of outer fastening portions 25u and the inner fastening portions 25n are attached at substantially the same position in the vehicle front-rear direction at both outer edges in the vehicle width direction and at each of the front and rear sides.

  As shown in FIG. 1 and FIG. A rear floor inclined member 32 is disposed behind the position where the two cross members 35 are connected.

  The front part of the rear floor inclined member 32 is No. 2 The tunnel member 20 is disposed at a position where it overlaps with the portion connected to the tunnel side frame 9 in the vehicle front-rear direction (see FIGS. 1 to 3). The rear floor inclined member 32 extends toward the rear side in the vehicle width direction, and the rear part thereof includes the vicinity of the joint portions CRl, CRr, and No. 3 of the side sill 3 and the center pillar 5. 2.5 It is joined to the outer end of the cross member 36 in the vehicle width direction (see FIGS. 1 and 2).

  As shown in FIGS. 1 and 2, the rear floor inclined member 32 forms a closed section 32S (hereinafter referred to as “rear floor inclined member closed section 32S”) with the upper portion of the floor panel 2. In this way, it is arranged on the upper part of the floor panel 2.

  Further, as shown in FIG. 2 The position behind the tunnel member 20, more specifically, No. 2 in the floor tunnel 8. No. 2.5 at the same position in the vehicle front-rear direction as the position where the cross member 36 is disposed. 2.5 A tunnel member 26 is provided. The No. 3 cross member 37 is located at the same position in the vehicle front-rear direction as the No. 3 cross member 37. Three tunnel members 27 are provided.

No. 2.5 Tunnel member 26 and No. 2 The three tunnel members 27 are configured in a straight line connecting both sides in the vehicle width direction on the lower surface of the floor tunnel 8 of the floor panel 2 across the floor tunnel 8, and each of the three tunnel members 27 has a linear shape along the vehicle width direction. It has closed cross-sections 26S and 27S (see the figure).
In addition, No. 2.5 Tunnel member 26 and No. 2 No. 3 tunnel member 27 also No. 3 As with the two tunnel members 20, the floor panel 8 is fastened to the edge of the floor tunnel 8 in the vehicle width direction by bolts B and nuts N, but these fastening parts are not shown.

  The lower vehicle body structure of the vehicle V according to the present embodiment described in detail above includes left and right side sills 3, 3 extending in the vehicle front-rear direction outside the vehicle width direction of the vehicle body, and a floor panel 2 connected to the left and right side sills 3, 3. And a dash panel 1 that extends upward from the front portion of the floor panel 2, left and right front side frames 7 that extend in the vehicle front-rear direction at the front portion of the dash panel 1, and ends of the side sill 3 that are joined to each other in the vehicle width direction. No. as a cross member extending to A front and rear member 16 extending rearward from a position in the vicinity of the rear side of the front side frame 7 and a rear side from the front of the side sill 3 toward the inner side in the vehicle width direction. And the front floor inclined member 31 extending in a slanted manner in the vehicle plan view is substantially V-shaped, and the V-shaped top portion 40 is No. in the vehicle plan view. 2. It is characterized in that it is disposed in the vicinity of the middle part of the cross member 35 (see FIG. 1).

  According to the above configuration, as shown in FIG. The two cross members 35 can receive the front collision loads F1 and F2 transmitted from the front and rear members 16 and the front floor inclined member 31, and can also distribute and transmit the received front collision loads F1 and F2 in the vehicle width direction ( In this way, load transmission performance can be improved by using a plurality of front impact load transmission paths.

  As an aspect of the present invention, a floor tunnel 8 bulging upward at the center of the floor panel 2 is provided. 2 cross members 35 are disposed so as to connect the side sill 3 and the floor tunnel 8. No. 2 as a tunnel member that connects the left and right lower portions of the floor tunnel 8 to the position where the cross member 35 is connected. 2 tunnel member 20 is provided, and floor tunnel 8 No. 2 is arranged. A rear floor inclined member 32 extending toward the rear side in the vehicle width direction and extending rearward in the vicinity of the position where the two cross members 35 are connected is disposed (see FIGS. 1 to 3).

  According to the above configuration, no. 2 Since the load is transmitted to the opposite side in the vehicle width direction via the tunnel member 20 (see loads F5 to F7 in FIG. 2), the above-described load dispersion transmission effect in the vehicle width direction can be further enhanced. it can.

  The lower vehicle body structure of the vehicle V according to the present embodiment includes the left and right side sills 3 and 3 extending in the vehicle front-rear direction outside the vehicle width direction of the vehicle body and the hinge pillars extending upward from the front positions of the left and right side sills 3 and 3, respectively. 4 and 4, center pillars 5 and 5 extending upward from the vehicle longitudinal direction intermediate position of the left and right side sills 3 and 3, the floor panel 2 connected to the left and right side sills 3 and 3, and the center of the floor panel 2 The floor tunnel 8 that bulges upward in the section and the No. 1 connected to the floor panel 2 extending from the side sill 3 in the vehicle width direction. 2 cross member 35 and floor tunnel 8 No. No. 2 that connects the left and right lower portions of the floor tunnel 8 at the position where the cross member 35 is connected. 2 is a lower body structure of a vehicle provided with a tunnel member 20 and extends from the vicinity of the joint portion CFr, CFl between the side sill 3 and the hinge pillar 4 so as to incline toward the rear side in the vehicle width direction. 2 The front floor inclined member 31 connected to the cross member 35 and the floor tunnel 8 No. 2 A rear floor inclined member 32 extending rearward in the vicinity of the position where the cross member 35 is connected and inclined outward in the vehicle width direction and connected to the vicinity of the connecting portion CRl, CRr of the side sill 3 and the center pillar 5. Are arranged (see FIGS. 1 and 2).

  According to the above configuration, the front floor inclined member 31, 2 cross member 35, no. 2 It is possible to transmit a front collision load to the opposite side in the vehicle width direction via the tunnel member 20 and the rear floor inclined member 32 (see loads F2, F3, F5 and F7 in FIG. 2).

Next, the second embodiment will be described. However, the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.
(Second embodiment)
As shown in FIG. 5, the lower body structure of the vehicle Va of the second embodiment is such that the front and rear members 160 are moved from the top 40 position that forms a V-shape with the front floor inclined member 31 in a vehicle plan view. The two cross members 35 are extended to the rear.

  The front and rear members 160 are disposed so as to expand outward in the vehicle width direction toward the rear of the vehicle, and the rear end portion thereof is directly connected to the front end portion of the rear side frame 14 extending in the vehicle front and rear direction at the rear portion of the vehicle Va. With such a configuration, in this embodiment, the front side frame 7 and the rear side frame 14 are connected by the front and rear members 160.

  In addition, in the position which opposes the connection part to which the front-and-back member 160 and the rear side frame 14 were connected in the vehicle up-down direction, the above-mentioned No. A three cross member 37 is provided.

  According to the above configuration, as shown in FIG. 2 In addition to the load transmission path in the vehicle width direction by cross member 35 (see loads F3 and F4 in FIG. 5), the load transmission path to the rear of the vehicle (see load F8 in FIG. 5) is further increased. The load transmission performance can be further enhanced.

In the correspondence between the configuration of the present invention and the above-described embodiment, the tunnel member of the present invention is the No. of the embodiment. Corresponding to two tunnel members 20,
Similarly, the cross member is no. Although corresponding to the two cross members 35, the present invention is not limited to the configuration of the above-described embodiment.

  For example, in the first embodiment described above, the front floor inclined member 31 is disposed at the lower portion of the floor panel 22 and the rear floor inclined member 32 is disposed at the upper portion of the floor panel 22 (see FIG. 1). Not limited to this, as shown in FIG. 6, not only the front floor inclined member 31 but also the rear floor inclined member 320 may be disposed below the floor panel 22.

  Such a structure in which the rear floor inclined member 320 is disposed at the lower portion of the floor panel 22 may be applied to the lower vehicle body structure of the vehicle Va according to the second embodiment. Alternatively, in the second embodiment, both the front floor inclined member 31 and the rear floor inclined member 32 may be disposed on the upper portion of the floor panel 22, or the front floor inclined member 31 is disposed on the upper portion of the floor panel 22. In addition to the arrangement, the rear floor inclined member 32 may be arranged below the floor panel 22.

  As described above, the present invention, for example, the left and right side sills extending in the vehicle front-rear direction outside the vehicle width direction of the vehicle body, the floor panel connected to the left and right side sills, and upward from the front portion of the floor panel. A lower body structure of a vehicle comprising: an extending dash panel; left and right front side frames extending in the vehicle front-rear direction at a front portion of the dash panel; and a cross member having an end portion coupled to the side sill and extending in the vehicle width direction. Useful for.

V, Va ... Vehicle 1 ... Dash panel 2 ... Floor panel 3 ... Side sill 4 ... Hinge pillar 5 ... Center pillar 7 ... Front side frame 8 ... Floor tunnel 16, 160 ... Front and rear members 20 ... No. 2 tunnel members (tunnel members)
31 ... Front floor inclined member 320 ... Rear floor inclined member 35 ... No. 2 cross members (cross members)
40 ... V-shaped top portions CFr, CFl ... Near the binding site between the side sill and the hinge pillar CRl, CRr ... Near the binding site between the side sill and the center pillar

Claims (3)

Left and right side sills extending in the vehicle longitudinal direction outside the vehicle width direction of the vehicle body,
A floor panel connected to the left and right side sills;
A dash panel extending upward from the front of the floor panel;
Left and right front side frames extending in the vehicle longitudinal direction at the front of the dash panel;
A lower vehicle body structure of a vehicle comprising a cross member whose end is coupled to the side sill and extending in the vehicle width direction,
Having a floor tunnel bulging upward at the center of the floor panel;
The cross member is arranged to connect the side sill and the floor tunnel;
At the position where the cross member of the floor tunnel is connected, a tunnel member that connects the left and right lower portions of the floor tunnel is disposed,
Front and rear members extending rearward from the position near the rear portion of the front side frame, and a front floor inclined member extending inclined inward in the vehicle width direction from the front portion of the side sill,
It is substantially V-shaped in a plan view of the vehicle, and the top of the V-shape is disposed near the middle portion of the cross member in a plan view of the vehicle .
A lower vehicle body structure of a vehicle, wherein a rear floor inclined member extending obliquely toward the rear side in the vehicle width direction is disposed at a rear side of the floor tunnel near the position where the cross member is connected . The lower body structure of a vehicle according to claim 1, wherein the front and rear members extend rearward of the cross member from the V-shaped top position. Left and right side sills extending in the vehicle longitudinal direction outside the vehicle width direction of the vehicle body,
A hinge pillar extending upward from the front position of each of the left and right side sills;
A center pillar extending upward from an intermediate position in the vehicle longitudinal direction of each of the left and right side sills;
A floor panel connected to the left and right side sills;
A floor tunnel bulging upward at the center of the floor panel;
A cross member extending from the side sill in the vehicle width direction and connected to the floor panel;
A tunnel member that connects the left and right lower portions of the floor tunnel at a position where the cross member of the floor tunnel is connected;
A lower body structure of a vehicle equipped with
A front floor inclined member that extends from the vicinity of the coupling portion between the side sill and the hinge pillar and inclines toward the rear side in the vehicle width direction, and is connected to the cross member;
A rear floor inclined member extending rearwardly in the vehicle width direction outward toward the rear side in the vicinity of the position where the cross member of the floor tunnel is connected, and connected to the vicinity of a joint portion between the side sill and the center pillar; A lower body structure of a vehicle in which is disposed.

Images