JP2019171934A - Front body structure of vehicle - Google Patents

Abstract

To provide a front body structure of a vehicle that can suppress deformation of a dash panel due to load energy applied to a suspension tower, even when load energy acts on left and right suspension towers at different timings. Aim. A dash panel includes a dash panel main body having a tunnel-corresponding portion corresponding to a floor tunnel, and a dash cross member connecting a lower portion of a hinge pillar. A dash panel reinforcing member 18 joined to the vehicle above the dash cross member 17. The dash cross member 17 includes a member portal-shaped portion 17a formed along the tunnel corresponding portion 15a. The member 18 is connected to the dash cross member 17 across the member gate-shaped portion 17a, and is formed in a substantially gate-shaped front view in which the upper end is close to the cowl box 13. [Selection diagram] FIG.

Description

  The present invention relates to a front body structure of a vehicle in which a reinforcing member that suppresses bending deformation of a dash panel, for example, is provided in the dash panel.

  For a vehicle such as an automobile, for example, a front suspension damper (hereinafter referred to as a “front suspension damper”) that secures a ride comfort for an occupant by suppressing the vertical movement of the vehicle body by expanding and contracting according to the unevenness of the road surface. However, it is connected to the skeleton member of the vehicle body via the suspension tower.

  Generally, a relatively large load energy is likely to act on the suspension tower via the front suspension damper, so the suspension tower may be bent and deformed by the load energy acting via the front suspension damper. When such a bending deformation occurs in the suspension tower, there is a risk that the operability is lowered or the vibration noise transmitted to the passenger compartment is increased.

Therefore, there is known a vehicle body structure for improving the rigidity of the suspension tower by a connecting member having one end connected to the suspension tower.
For example, in Patent Document 1, a pair of left and right suspension towers (7) that support a front suspension damper (shock absorber) and a pair of left and right suspension towers (11) provided on the front surface of a dash panel (6) are connected. It is disclosed that the reinforcing member (16) is provided in the front body of the vehicle.

  Accordingly, Patent Document 1 can improve the rigidity of the suspension tower (7), and also distribute and transmit load energy acting on the suspension tower to the front vehicle body via the reinforcing member (16), so that the left and right suspension towers (7) It is said that the rigidity can be secured.

  By the way, the dash panel of Patent Document 1 has left and right hinge pillars with rigidity in the upper part of the vehicle rather than the dash cross member portions (the intermediate part 12 and the standing part 13 of Patent Document 1) corresponding to the front end shape of the floor tunnel. It tends to be lower than the rigidity in the vicinity and the rigidity of the lower part where the dash cross member is joined.

  In such a front vehicle body of Patent Document 1, for example, when load energy acts on the left and right suspension towers at different timings, the vehicle right side portion and the vehicle left side portion of the dash panel are deformed in different directions. In other words, when load energy acts on the left and right suspension towers at different timings, Patent Document 1 discloses a displacement difference between the vehicle right side portion and the vehicle left side portion of the dash panel as compared with the case where load energy acts on the left and right suspension towers substantially simultaneously. Tends to be large.

  For this reason, in Patent Document 1, when load energy is applied to the left and right suspension towers at different timings, the dash panel is greatly deformed, which may deteriorate the ride comfort for the occupant, and there is room for further improvement. .

JP 2017-171102 A

  In view of the above-described problems, the present invention provides a vehicle front body structure that can suppress deformation of a dash panel due to load energy acting on a suspension tower even when load energy acts on left and right suspension towers at different timings. The purpose is to do.

  The present invention includes a dash panel that forms a partition in front of a vehicle in a vehicle compartment, a pair of left and right hinge pillars that are connected to both ends of the dash panel, and that extends in the vehicle vertical direction, and is connected to an upper end of the dash panel. And a vehicle body structure including a cowl box for connecting the left and right hinge pillars in the vehicle width direction and a suspension tower for supporting the upper end of the front suspension damper, wherein the dash panel is A dash body having a lower end corresponding to a tunnel whose lower end protrudes upward in the vehicle corresponding to a floor tunnel disposed in the vicinity of the center in the vehicle width direction, and a lower front surface of the dash body and the left and right hinge pillars A dash cross member connecting the lower portion in the vehicle width direction, and the dash cross member above the dash cross member above the vehicle A dash panel reinforcing member joined to the main body, and the dash cross member includes a member gate-shaped portion having a substantially portal shape in front view formed along a lower end of the dash main body corresponding to the tunnel. The panel reinforcing member, when viewed from the front, has a lower end connected to the dash cross member straddling the member portal portion, and an upper end formed in a substantially portal shape near the cowl box. And

The front-view substantially gate-shaped shape includes a front-view substantially U-shape opening in the lower part of the vehicle, a front-view substantially inverted U-shape, a front-view substantially V-shape, or a front-view substantially M-shape.
According to the present invention, even when load energy acts on the left and right suspension towers at different timings, deformation of the dash panel due to the load energy acting on the suspension tower can be suppressed.

  Specifically, the dash panel reinforcing member disposed between the dash cross member and the cowl box enables the front body structure of the vehicle to improve the rigidity of the upper portion of the vehicle as compared to the member portal portion of the dash body. Further, it is possible to suppress the vehicle upper portion from being a member concentration portion in the dash body as a stress concentration portion.

  Thereby, the front body structure of the vehicle can suppress a displacement difference generated between the right side portion of the dash panel and the left side portion of the dash panel when load energy is applied to the left and right suspension towers at different timings, for example. it can.

  Furthermore, the front body structure of the vehicle can improve the load energy transmission efficiency in the dash panel by the dash panel reinforcing member, so that, for example, the load energy acting on the suspension tower can be reliably transmitted further to the vehicle body via the hinge pillar. can do.

  Therefore, the front body structure of the vehicle can suppress the deformation of the dash panel due to the load energy applied to the suspension tower by the dash panel reinforcing member even when the load energy is applied to the left and right suspension towers at different timings. it can.

As an aspect of the present invention, the dash panel reinforcing member may be formed in a shape that forms a closed section with the dash body.
According to the present invention, the front body structure of the vehicle can further improve the rigidity of the upper portion of the vehicle by the dash panel reinforcing member as compared to the member portal portion of the dash body.

  For this reason, even if load energy is applied to the left and right suspension towers at different timings, the front body structure of the vehicle is based on the load energy acting on the suspension tower by the dash panel reinforcement member that forms a closed section with the dash panel. The deformation of the dash panel can be further suppressed.

As an aspect of the present invention, the dash panel reinforcing member is integrally formed of a reinforcing main body portion having a substantially portal shape in front view and a substantially flat plate portion disposed inside the reinforcing main body portion in front view. It may be formed automatically.
According to the present invention, the front body structure of the vehicle can further improve the rigidity of the dash panel reinforcing member. For this reason, the front body structure of the vehicle can more reliably improve the rigidity of the vehicle upper portion than the member portal portion of the dash body by the dash panel reinforcing member.

  Therefore, the front body structure of the vehicle has a load applied to the suspension tower by the dash panel reinforcement member composed of the reinforcing body and the flat plate even when load energy is applied to the left and right suspension towers at different timings. The deformation of the dash panel due to energy can be more reliably suppressed.

  Further, as an aspect of the present invention, the dash panel reinforcing member has a pair of left and right leg portions extending from the lower end connected to the dash cross member to the upper side of the vehicle in the front view, and the upper ends of the leg portions in the vehicle width direction. In addition to connecting, a bridge portion whose upper end is close to the cowl box and at least one connecting portion for connecting the left and right leg portions in the vehicle width direction below the bridge portion in the vehicle may be provided.

  According to the present invention, the front body structure of the vehicle can further improve the rigidity of the dash panel reinforcing member. For this reason, the front body structure of the vehicle can further improve the rigidity of the upper portion of the vehicle by the dash panel reinforcing member as compared with the member portal portion of the dash body.

  Therefore, even if load energy is applied to the left and right suspension towers at different timings, the vehicle body structure of the front part of the vehicle depends on the load energy applied to the suspension tower by the dash panel reinforcing member having the connecting portion that connects the legs. The deformation of the dash panel can be further suppressed.

  According to the present invention, it is possible to provide a vehicle front body structure that can suppress deformation of a dash panel due to load energy acting on a suspension tower even when load energy acts on left and right suspension towers at different timings.

The top view which shows the external appearance in the front vehicle body of a vehicle. The external appearance perspective view which shows the external appearance from the vehicle front upper direction in the front vehicle body of a vehicle. AA arrow sectional drawing in FIG. The principal part sectional drawing which shows the cross section of the principal part in the BB arrow in FIG. The principal part sectional drawing which shows the cross section of the vehicle left side principal part in AA arrow view. The top view which shows the external appearance of the principal part in the front vehicle body of a vehicle. The principal part sectional view which shows the cross section of the principal part in CC arrow in FIG.

An embodiment of the present invention will be described below with reference to the drawings.
1 shows a plan view of the appearance of the front body of the vehicle 1, FIG. 2 shows a perspective view of the appearance of the front body of the vehicle 1 from the front upper side of the vehicle, and FIG. 3 shows AA in FIG. 4 shows a cross-sectional view of the main part of the main part in the direction of arrow BB in FIG. 1, and FIG. 5 shows a cross-sectional view of the main part of the main part of the left side of the vehicle in the direction of arrow AA. 6 shows a plan view of the main part of the front vehicle body of the vehicle 1, and FIG. 7 shows a cross-sectional view of the main part taken along the line CC in FIG.

2, the illustration of the side sill outer of the side sill 7 on the left side of the vehicle and the hinge pillar outer of the hinge pillar 9 is omitted in FIG. 2, and the front pillar 8, the suspension tower 5, and the apron reinforcement on the left side of the vehicle are omitted. The illustration of the ment 4 and the heat shield member outer 61 is omitted.
Furthermore, for clarity of illustration, the illustration of the cowl upper 132 of the cowl box 13 is omitted in FIG. 6.

In the figure, arrows Fr and Rr indicate the front-rear direction, arrow Fr indicates the front, and arrow Rr indicates the rear.
Furthermore, arrows Rh and Lh indicate the width direction, arrow Rh indicates the right direction, and arrow Lh indicates the left direction. In addition, the arrow IN indicates the inner side in the vehicle width direction, and the arrow OUT indicates the outer side in the vehicle width direction.

  As shown in FIGS. 1 and 2, the vehicle body structure of the vehicle 1 in the present embodiment includes a vehicle compartment portion 2 in which an occupant gets in, and a pair of left and right front side frames 3 disposed in front of the vehicle compartment 2. , A pair of left and right apron reinforcements 4, a pair of left and right suspension towers 5, and a pair of left and right heat shield members 6.

  As shown in FIGS. 1 and 2, the vehicle compartment portion 2 is disposed above the vehicle with respect to the pair of left and right side sills 7 extending in the vehicle front-rear direction at positions spaced apart from each other in the vehicle width direction. A pair of left and right front pillars 8, a front end of the side sill 7, a hinge pillar 9 that connects the front end of the front pillar 8 in the vehicle vertical direction, and a floor panel 10 that forms the floor of the vehicle compartment 2 between the left and right side sills 7. A pair of left and right floor frames 11 extending in the vehicle longitudinal direction on the lower surface of the floor panel 10, a dash panel 12 and a cowl box 13 forming the front wall of the vehicle compartment 2, and an instrument panel member 14 connecting the left and right hinge pillars 9 It consists of

  Although the detailed illustration of the left and right side sills 7 is omitted, the side sill inner 7 a disposed on the inner side in the vehicle width direction and the side sill outer disposed on the outer side in the vehicle width direction with respect to the side sill inner 7 a A cross-sectional shape in a longitudinal section along the direction is configured to form a closed section.

  For example, as shown in FIG. 2, the side sill 7 includes a side sill inner 7 a having a substantially hat-shaped cross-section protruding inward in the vehicle width direction and a longitudinal section along the vehicle width direction. The cross-sectional shape of the vertical cross-section in the vehicle width direction is closed by bringing the side sill outer having a substantially hat-shaped cross-section projecting outward in the vehicle width direction into contact with each other in the vehicle width direction and joining together. It is comprised so that a cross section may be made.

  The left and right front pillars 8 are not illustrated in detail, but include a front pillar inner disposed on the inner side in the vehicle width direction, and a front pillar outer disposed on the outer side in the vehicle width direction with respect to the front pillar inner. Thus, the longitudinal section along the vehicle width direction is configured to form a closed section. As shown in FIGS. 1 and 2, the front pillar 8 is disposed such that the rear end thereof is positioned above the rear of the vehicle with respect to the front end.

  For example, the front pillar 8 has a cross-sectional shape in a horizontal cross section along the vehicle width direction, a front pillar inner having a substantially hat-shaped cross section protruding inward in the vehicle width direction, and a cross-sectional shape in a horizontal cross section along the vehicle width direction. The cross-sectional shape in the longitudinal section along the vehicle width direction forms a closed section by bringing the front pillar outer that protrudes outward in the vehicle width direction into contact with the front pillar outer having a substantially hat shape in the vehicle width direction and joining together. Has been.

  The left and right hinge pillars 9 are not shown in detail, but the hinge pillar inner 9a disposed on the inner side in the vehicle width direction and the hinge pillar outer disposed on the outer side in the vehicle width direction with respect to the hinge pillar inner 9a. The horizontal cross section along the vehicle front-rear direction forms a closed cross section.

For example, as shown in FIG. 2, the hinge pillar 9 includes a substantially flat side sill inner 7a and a hinge pillar outer having a substantially hat-shaped cross section in which a cross-sectional shape in a horizontal cross section along the vehicle longitudinal direction protrudes outward in the vehicle width direction. Are brought into contact with each other in the vehicle width direction and are joined to each other so that a cross-sectional shape in a horizontal cross section along the vehicle width direction forms a closed cross section.
As shown in FIG. 2, the hinge pillar inner 9 a is formed in such a size that the front edge is positioned in front of the vehicle with respect to the front end of the side sill 7 and a dash panel 12 described later.

  As shown in FIGS. 1 and 2, the floor panel 10 is a panel member that connects the left and right side sills 7 to form the floor surface of the passenger compartment 2. The floor panel 10 is located approximately above the vehicle in the vehicle width direction. A floor tunnel 10a that bulges toward the vehicle and extends in the vehicle front-rear direction is formed. The front edge of the floor panel 10 is joined to a dash panel 12 (a dash panel body 15 described later).

  Further, as shown in FIG. 2, the left and right floor frames 11 are respectively disposed between the side sill 7 and the floor tunnel 10a. The floor frame 11 has a cross-sectional shape in a vertical cross section along the vehicle width direction, which is a substantially hat-shaped cross section protruding downward in the vehicle, and is joined to the lower surface of the floor panel 10 so as to extend along the vehicle width direction. The cross-sectional shape in the longitudinal section is formed so as to form a closed section.

  Further, as shown in FIGS. 2 to 4, the dash panel 12 includes a dash panel main body 15 that forms the front wall of the passenger compartment 2, a pair of left and right torque boxes 16 that are joined to the front surface of the dash panel main body 15, and a dash panel 12. The cross member 17 and the dash panel reinforcing member 18 are configured.

  As shown in FIGS. 2 to 4, the dash panel main body 15 is a panel member having a predetermined thickness in the vehicle front-rear direction, and both ends in the vehicle width direction are joined to the left and right hinge pillars 9, respectively. Furthermore, the lower end of the dash panel 12 turned back toward the rear of the vehicle is joined to the lower surface of the front end of the floor panel 10.

  As shown in FIG. 3, the lower end of the dash panel body 15 in the vicinity of the center in the vehicle width direction protrudes in a substantially inverted U shape upward in the vehicle so as to follow the floor tunnel 10a of the floor panel 10 as viewed from the front. It is formed in the shape. A portion formed in a shape along the floor tunnel 10a is referred to as a tunnel corresponding portion 15a.

  As shown in FIG. 3, the torque box 16 is joined to the lower front surface of the dash panel main body 15, and connects the front end of the side sill 7 and the outer side surface of the floor frame 11 in the vehicle width direction. Yes.

  More specifically, as shown in FIGS. 3 and 5, the torque box 16 includes a front end of the side sill 7, a lower front surface of the dash panel 12 adjacent to the side sill 7 in the vehicle width direction, and a front end of the floor frame 11. The cross-sectional shape in the horizontal cross section along the vehicle front-rear direction is formed in a substantially box shape having a closed cross section with the side surface in the vicinity.

  2 to 4, the dash cross member 17 is joined to the lower front surface of the dash panel body 15 above the vehicle relative to the torque box 16, and the hinge pillar inner 9a of the left and right hinge pillars 9 is connected in the vehicle width direction. It is linked to.

  As shown in FIGS. 2 to 4, the dash cross member 17 has a substantially hat-shaped open cross section that protrudes forward in the longitudinal direction along the vehicle longitudinal direction, along the lower front surface of the dash panel body 15. It is formed in an extended shape. For this reason, the dash cross member 17 is configured such that the cross-sectional shape in the longitudinal section along the vehicle front-rear direction forms a closed section with the lower front surface of the dash panel body 15.

  More specifically, as shown in FIG. 3, the dash cross member 17 has a substantially inverted U-shaped front-view substantially gate shape that protrudes upward in the vehicle along the tunnel-corresponding portion 15 a of the dash panel body 15 in the front view. The member gate-shaped portion 17a having a shape and a pair of left and right member horizontal portions 17b extending inward in the vehicle width direction from the lower end of the member gate-shaped portion 17a toward the left and right hinge pillar inners 9a are integrally formed. ing.

  2 and 3, the dash panel reinforcing member 18 is disposed on the front surface of the dash panel main body 15 above the vehicle relative to the member gate-shaped portion 17a of the dash cross member 17, and has a lower end at the dash cross. The member 17 is joined, and the upper end is joined to a cowl box 13 which will be described later.

As shown in FIGS. 2 and 3, the dash panel reinforcing member 18 is a substantially flat plate-like reinforcing member main body 181 having a substantially gate-like shape when viewed from the front, and a portion surrounded by the reinforcing member main body 181. The flat plate portion 182 is integrally formed.
As shown in FIGS. 3 and 4, the reinforcing member main body 181 has a cross-sectional shape in a longitudinal section along the vehicle front-rear direction that has a substantially hat-shaped cross section that protrudes forward of the vehicle, and has an open cross section that has a substantially hat-shaped cross section. It is formed in a shape extending in a substantially gate shape when viewed from the front.

  More specifically, as shown in FIG. 3, the reinforcing member main body 181 is a vehicle at a position spaced a predetermined distance in the vehicle width direction with the top portion of the member gate-shaped portion 17 a of the dash cross member 17 in front view. A leg portion 181a extending in the vertical direction and a bridge portion 181b connecting the upper ends of the leg portions 181a in the vehicle width direction are formed in a substantially portal shape when viewed from the front.

  As shown in FIG. 3, the leg portion 181 a of the reinforcing member main body 181 is joined at its lower end to a portion on the outer side in the vehicle width direction from the top portion of the member gate-shaped portion 17 a of the dash cross member 17. A range from the lower end to the upper end of 181a is joined to the front surface of the dash panel 12. On the other hand, as shown in FIGS. 3 and 4, the bridge portion 181b of the reinforcing member main body 181 has a lower end joined to the front surface of the dash panel 12, and an upper end to a lower front wall portion 131b of the cowl box 13 described later. It is joined.

  3 and 4, the flat plate portion 182 is a substantially flat plate member that covers a portion surrounded by the left and right leg portions 181a and the bridge portion 181b in the reinforcing member main body 181, and is a front surface of the dash panel 12. It is joined to. The upper end of the member gate-shaped portion 17a of the dash cross member 17 is joined to the lower front surface of the flat plate portion 182.

Further, as shown in FIGS. 3 and 4, the flat plate portion 182 is formed with two beads 182 a that protrude toward the front of the vehicle and extend in the vehicle width direction at positions spaced apart in the vertical direction of the vehicle. Has been. The two beads 182a are formed so that both ends in the vehicle width direction are connected to the left and right legs 181a.
In other words, the dash panel reinforcing member 18 is formed with two beads 182a as connecting portions that connect the left and right leg portions 181a of the reinforcing member main body 181 at a position spaced apart in the vehicle vertical direction.

  As shown in FIGS. 1 and 2, the cowl box 13 has a substantially arcuate shape in plan view with a substantially center in the vehicle width direction protruding forward of the vehicle in plan view, and the left and right hinge pillars 9 are arranged in the vehicle width direction. It connects and is joined to the upper end of the dash panel 12.

  As shown in FIG. 4, the cowl box 13 includes a cowl lower 131 joined to the upper end of the dash panel 12 and a cowl upper 132 that covers the cowl lower 131 from above the vehicle. It is formed to have a closed cross section.

  More specifically, as shown in FIG. 4, the cowl lower 131 includes a lower front edge portion 131a having a predetermined thickness in the vehicle vertical direction, and a lower front wall portion 131b extending downward from the lower front edge portion 131a to the vehicle rear side. And a cowl bottom 131c extending from the lower end of the lower front wall 131b toward the rear of the vehicle, and extending slightly from the cowl bottom 131c upward to the rear of the vehicle, and then extending toward the rear of the vehicle. The lower rear edge 131d is integrally formed.

  On the other hand, as shown in FIG. 4, the cowl upper 132 extends from the rear end of the upper front edge 132a to the upper side of the vehicle with a substantially flat plate-like upper front edge 132a having a thickness in the vehicle vertical direction. Upper front wall portion 132b extending toward the vehicle rear upper side, cowl top plate portion 132c extending from the upper end of upper front wall portion 132b to the vehicle rear side, and vehicle rear lower portion from the rear end of cowl top plate portion 132c The upper rear wall portion 132d extending to the rear and the upper rear edge portion 132e extending rearward from the lower end of the upper rear wall portion 132d are integrally formed.

  As shown in FIG. 4, the cowl box 13 joins the lower front edge portion 131a and the upper front edge portion 132a, and joins the lower rear edge portion 131d and the upper rear edge portion 132e. The cross-sectional shape in the longitudinal section along the front-rear direction is formed to be a closed section.

  Further, as shown in FIGS. 1, 2, and 7, the instrument panel member 14 has a substantially cylindrical shape having a predetermined inner and outer diameter, and is located at a position spaced apart from the cowl box 13 at the rear of the vehicle. The upper part of the hinge pillar 9 is connected in the vehicle width direction. Although not shown in detail, the instrument panel member 14 is disposed, for example, as a support member that supports a steering shaft, an in-vehicle device of the vehicle 1, or a wire harness that electrically connects the in-vehicle devices.

  Further, as shown in FIGS. 1 and 2, the left and right front side frames 3 are disposed at positions on the inner side in the vehicle width direction with respect to the hinge pillar 9 and on the outer side in the vehicle width direction with respect to the floor tunnel 10a in plan view. In addition, the rear end is joined to the front end of the floor frame 11.

  More specifically, the front side frame 3 is not illustrated in detail, but includes a front side frame inner disposed on the inner side in the vehicle width direction, and a front disposed on the outer side in the vehicle width direction with respect to the front side frame inner. The side frame outer is formed so that a cross-sectional shape in a longitudinal section along the vehicle width direction forms a closed section.

  For example, the front side frame 3 includes a front side frame inner having a substantially hat-shaped cross section protruding inward in the vehicle width direction and a longitudinal section in the vertical cross section along the vehicle width direction. The cross-sectional shape in the longitudinal section along the vehicle width direction is closed by bringing the front side frame outer with a substantially hat-shaped cross section protruding outward in the vehicle width direction into contact with each other in the vehicle width direction and joining together. It is comprised so that a cross section may be made.

  As shown in FIG. 2, the rear end of the front side frame 3 is joined to the front end of the floor frame 11 and the vicinity of the inner end in the vehicle width direction of the member horizontal portion 17 b of the dash cross member 17. A crush can (not shown) is connected to the front end of the front side frame 3.

  Further, the left and right apron reinforcements 4 are disposed at positions on the outer side in the vehicle width direction and on the vehicle upper side than the front side frame 3, as shown in FIGS. More specifically, the apron reinforcement 4 is formed in a shape extending from the upper end of the hinge pillar 9 toward the front of the vehicle and slightly inward in the vehicle width direction.

  As shown in FIGS. 1 and 2, the left and right suspension towers 5 support the upper ends of front suspension dampers (not shown) in the front suspension at desired positions spaced a predetermined distance from the dash panel 12 in front of the vehicle. It is formed in a possible shape.

More specifically, as shown in FIG. 2, the suspension tower 5 is provided with a tower upper surface portion 5a provided with an insertion opening into which the upper end of the suspension damper is inserted, and extends downward from the vehicle width direction inside the tower upper surface portion 5a. The tower side wall portion 5b and the tower rear surface portion extending downward from the rear end of the tower upper surface portion 5a are integrally formed.
In the suspension tower 5, the lower end of the tower side wall 5 b is joined to the front side frame 3, and the outer edge in the vehicle width direction of the tower upper face 5 a is joined to the apron reinforcement 4.

  The left and right heat shield members 6 are structures that form a heat shield space S for heat insulation or heat shield between the dash panel 12 and the suspension tower 5 as shown in FIGS. 1 and 3. As shown in FIG. 3, the heat shield member 6 is disposed on the inner side in the vehicle width direction with respect to the pair of left and right heat shield members outer 61 disposed on the outer side in the vehicle width direction and the heat shield member outer 61. A pair of left and right heat shield members 62 connecting the suspension tower 5 and the dash panel 12 are also included.

  As shown in FIGS. 1 and 3, the left and right heat shielding member outer 61 is a member on which, for example, an in-vehicle battery or the like is placed and fixed, and a cross-sectional shape in a vertical cross section along the vehicle width direction is substantially L in cross section. It is formed in a letter shape.

  More specifically, as shown in FIG. 3, the heat shield member outer 61 has a substantially flat plate shape having a predetermined thickness in the vehicle vertical direction, and an outer bottom portion 61 a joined to the upper surface of the front side frame 3, and the outer bottom portion 61 a. And an outer side wall 61b joined to the hinge pillar inner 9a of the hinge pillar 9 as a single body.

  As shown in FIGS. 1 to 3, the left and right heat shield member inners 62 include a heat shield inner upper part 621 that constitutes the upper part of the heat shield member inner 62 and a heat shield inner lower part that constitutes the lower part of the heat shield member inner 62. 622.

  As shown in FIGS. 1 and 2, the left and right heat shield inner upper portions 621 are, as viewed in plan, the upper portion of the suspension tower 5 and the front surface of the dash panel 12 (the dash panel reinforcing member 18) on the inner side in the vehicle width direction than the suspension tower 5. Are linked. As shown in FIGS. 3 and 5, the heat shield inner upper part 621 is formed in an open cross-sectional shape having a substantially U-shaped cross-section in which a cross-sectional shape in a longitudinal section along the vehicle width direction is open in the vehicle width direction. ing.

  More specifically, as shown in FIGS. 3 and 5, the heat shield inner upper portion 621 has a predetermined thickness in the vehicle vertical direction in a longitudinal section along the vehicle width direction, and an upper surface portion of the heat shield inner upper portion 621. The upper surface portion 621a is formed integrally with the upper surface portion 621a, the side wall portion 621b extending from the vehicle width direction inner side to the vehicle lower side, and the lower surface portion 621c extending from the lower end of the side wall portion 621b to the vehicle width direction outer side. Has been.

Note that the vicinity of the rear end of the heat shield inner upper portion 621 is bent inward in the vehicle width direction and is formed in a shape along the outer shape of the reinforcing member main body 181 in the dash panel reinforcing member 18.
As shown in FIG. 6, the heat shield inner upper portion 621 is arranged such that the rear end of the side wall portion 621b is located on the inner side in the vehicle width direction with respect to the front end of the side wall portion 621b.

That is, the heat shield inner upper part 621 is arranged so that the edge on the inner side in the vehicle width direction is inclined so as to be located on the inner side in the vehicle width direction as the vehicle rearward in plan view.
As shown in FIGS. 3 and 7, the heat shield inner upper portion 621 is joined to the suspension tower 5 at the front end, and the bent portion near the rear end is joined to the upper portion of the leg portion 181 a in the dash panel reinforcing member 18. ing. In other words, the heat shield inner upper part 621 is connected to the dash panel main body 15 via the dash panel reinforcing member 18.

  On the other hand, as shown in FIGS. 1 and 2, the left and right heat shield inner lower portions 622 connect the lower portion of the suspension tower 5 and the dash panel body 15 on the outer side in the vehicle width direction than the dash panel reinforcing member 18 in plan view. In addition, the lower part of the suspension tower 5 and the rear end of the front side frame 3 are connected.

  In FIG. 3, the heat shield inner lower part 622 on the right side of the vehicle and the heat shield inner lower part 622 on the left side of the vehicle are formed in different shapes. A description will be given using the inner lower portion 622.

  More specifically, as shown in FIGS. 3 and 5, the heat shield inner lower portion 622 has a thickness in the vehicle vertical direction in the longitudinal section along the vehicle width direction, and forms the upper surface portion of the heat shield inner lower portion 622. The side wall portion 622a extends along the side surface portion 622b extending from the vehicle width direction outer side of the upper surface portion 622a toward the upper surface of the front side frame 3 and the side surface of the front side frame 3 on the vehicle width direction inner side. It is integrally formed with a lower end portion 622c that extends further downward from the lower end of 622b.

  As shown in FIG. 2, the heat shield inner lower portion 622 is formed with a flange-like portion extending from the rear end of the upper surface portion 622a and the rear end of the side wall portion 622b to the vehicle upper side and the vehicle width direction outer side. ing. The flange-shaped portion of the heat shield inner lower portion 622 is joined to the front surface of the dash panel main body 15.

  Further, the lower end portion 622c of the heat shield inner lower portion 622 is curved from the front surface of the member horizontal portion 17b of the dash cross member 17 to the inner side surface of the front side frame 3 in the vehicle width direction, as shown in FIGS. It is formed in the shape. And the lower end part 622c of this heat insulation inner lower part 622 is joined to both the dash cross member 17 and the front side frame 3, as shown in FIG.2 and FIG.3.

  In addition, as shown in FIGS. 2, 3, and 5, the lower end portion 622 c of the heat shield inner lower portion 622 has a vehicle width direction so as to straddle the junction between the dash cross member 17 and the front side frame 3. A bulging portion 622d that bulges inward in a substantially triangular shape in plan view is formed. For this reason, the bulging portion 622d of the heat shield inner lower part 622 forms a closed cross section with the dash cross member 17 and the front side frame 3 in the horizontal cross section and the vertical cross section along the vehicle width direction.

  As shown in FIGS. 6 and 7, the front body of the vehicle 1 is disposed inside the cowl box 13 and a pair of left and right instrument panel connecting members 19 that connect the cowl box 13 and the instrument panel member 14. A pair of left and right connection auxiliary members 20 are provided.

As shown in FIGS. 6 and 7, the left and right instrument panel connecting members 19 are substantially rectangular in plan view that are long in the vehicle front-rear direction, and a connection upper surface portion 19 a that forms the upper surface portion of the instrument panel connection member 19, The left and right connecting side surface portions 19b extending downward from the both ends in the width direction are configured such that the cross-sectional shape in the longitudinal section along the vehicle width direction is a substantially gate-shaped cross section.
Note that the connection upper surface portion 19 a of the instrument panel connection member 19 is formed so that the vicinity of the front end can be brought into contact with the lower surface of the cowl box 13, and the rear end is formed so as to be able to come into contact with the upper portion of the instrument panel member 14.

  On the other hand, as shown in FIG. 7, the connecting side surface portion 19 b of the instrument panel connecting member 19 is formed in a shape in which a front end upper portion of a substantially flat plate having a substantially triangular shape in side view is extended forward in the side view. Further, as shown in FIG. 7, the connecting side surface portion 19 b of the instrument panel connecting member 19 has a rear end formed in a shape along the peripheral surface of the instrument panel member 14 in a side view.

  As shown in FIGS. 6 and 7, the instrument panel connecting member 19 has a position in the vehicle width direction substantially the same as the rear end of the heat shield inner upper portion 621 of the heat shield member inner 62, and the rear end of the heat shield inner upper portion 621. The front end is disposed at substantially the same position in the vehicle vertical direction. In other words, the front end of the instrument panel connecting member 19 is disposed opposite to the rear end of the heat shield inner upper portion 621 of the heat shield member inner 62 at a position spaced apart from the dash panel 12 in the vehicle front-rear direction. Yes.

  The rear part of the instrument panel connecting member 19 is joined to the outer peripheral surface of the instrument panel member 14, and the vicinity of the front end of the connecting upper face part 19a is joined to the cowl bottom 131c of the cowl box 13 and the lower rear edge 131d from below the vehicle. ing. That is, the instrument panel connecting member 19 is connected to the dash panel 12 via the cowl box 13.

  On the other hand, as shown in FIGS. 6 and 7, the left and right connection auxiliary members 20 are substantially cylindrical bodies extending in the vehicle front-rear direction, and are inner surfaces facing the vehicle front-rear direction inside the cowl box 13, that is, cowl lowers. The lower front wall 131b of 131 and the upper rear wall 132d of the cowl upper 132 are joined.

  More specifically, as shown in FIGS. 6 and 7, the coupling auxiliary member 20 has a front end at a position in the vehicle width direction that is substantially the same as the rear end of the heat shield inner upper portion 621 of the heat shield member inner 62. The lower front wall 131b is joined to the rear rear wall 132d of the cowl upper 132 at a position substantially the same as the front end of the instrument panel connecting member 19 in the vehicle width direction.

  As described above, the dash panel 12 that forms a partition in front of the vehicle in the compartment 2 of the vehicle 1, the pair of left and right hinge pillars 9 that are connected to both ends of the dash panel 12 and extend in the vehicle vertical direction, and the dash panel 12. The front vehicle body structure of the vehicle 1 including a cowl box 13 that connects the left and right hinge pillars 9 in the vehicle width direction and a suspension tower 5 that supports the upper end of the front suspension damper is connected to the upper end of the dash panel 12. However, in a front view, the dash panel main body 15 having a tunnel corresponding portion 15a whose lower end protrudes upward of the vehicle corresponding to the floor tunnel 10a disposed in the vicinity of the center in the vehicle width direction, and the lower front surface of the dash panel main body 15 And a dash cross member 17 for connecting the lower portions of the left and right hinge pillars 9 in the vehicle width direction, A dash panel reinforcing member 18 joined to a dash panel body 15 above the vehicle than the dash cross member 17, and the dash cross member 17 is formed along the tunnel corresponding portion 15 a of the dash panel body 15. The gate-shaped member gate-shaped portion 17a is provided, and the dash panel reinforcing member 18 is coupled to the dash cross member 17 with the lower end straddling the member gate-shaped shape portion 17a in the front view, and the upper end is the cowl box 13 Is formed in a substantially gate-like shape when viewed from the front, and even when load energy acts on the left and right suspension towers 5 at different timings, deformation of the dash panel 12 due to the load energy acting on the suspension tower 5 is suppressed. can do.

  Specifically, the dash panel reinforcing member 18 disposed between the dash cross member 17 and the cowl box 13 allows the vehicle body structure of the front portion of the vehicle 1 to be greater than the member gate-shaped portion 17 a of the dash panel body 15. The rigidity of the upper part can be improved, and the upper part of the vehicle can be prevented from becoming a stress concentration part than the member gate-shaped part 17a in the dash panel main body 15.

  Thereby, the front body structure of the vehicle 1 is, for example, a displacement difference generated between the vehicle right side portion of the dash panel 12 and the vehicle left side portion of the dash panel 12 when load energy acts on the left and right suspension towers 5 at different timings. Can be suppressed.

  Furthermore, since the front vehicle body structure of the vehicle 1 can improve the load energy transmission efficiency in the dash panel 12 by the dash panel reinforcing member 18, for example, the load energy acting on the suspension tower 5 is transferred from the vehicle body via the hinge pillar 9. It is possible to reliably transmit to far away.

  Accordingly, the front body structure of the vehicle 1 is a deformation of the dash panel 12 due to the load energy applied to the suspension tower 5 even when load energy is applied to the left and right suspension towers 5 at different timings by the dash panel reinforcement member 18. Can be suppressed.

  Further, since the dash panel reinforcing member 18 is formed in a shape having a closed cross section with the dash panel main body 15, the front body structure of the vehicle 1 is more vehicle than the member portal type shape portion 17 a in the dash panel main body 15. The rigidity of the upper portion can be further improved by the dash panel reinforcing member 18.

  For this reason, the front vehicle body structure of the vehicle 1 is formed in the suspension tower 5 by the dash panel reinforcing member 18 having a closed cross section with the dash panel 12 even when load energy is applied to the left and right suspension towers 5 at different timings. The deformation of the dash panel 12 due to the applied load energy can be further suppressed.

  Further, the dash panel reinforcing member 18 is integrally formed by a reinforcing member main body 181 having a substantially portal shape when viewed from the front, and a substantially flat plate portion 182 disposed inside the reinforcing member main body 181 when viewed from the front. As a result, the front body structure of the vehicle 1 can further improve the rigidity of the dash panel reinforcing member 18.

  For this reason, the front body structure of the vehicle 1 can more reliably improve the rigidity of the vehicle upper portion than the member gate-shaped portion 17 a in the dash panel body 15 by the dash panel reinforcing member 18.

  Therefore, the front vehicle body structure of the vehicle 1 has the dash panel reinforcing member 18 constituted by the reinforcing member main body 181 and the flat plate portion 182 even when load energy acts on the left and right suspension towers 5 at different timings. Deformation of the dash panel 12 due to load energy acting on the suspension tower 5 can be more reliably suppressed.

  The dash panel reinforcing member 18 connects the pair of left and right leg portions 181a extending from the lower end connected to the dash cross member 17 to the upper side of the vehicle in the front view, and the upper ends of the leg portions 181a in the vehicle width direction. By providing a bridge portion 181b whose upper end is close to the cowl box 13 and at least one bead 182a that connects the left and right legs 181a in the vehicle width direction below the bridge portion 181b, the front of the vehicle 1 is provided. The partial vehicle body structure can further improve the rigidity of the dash panel reinforcing member 18.

For this reason, the front body structure of the vehicle 1 can further improve the rigidity of the vehicle upper portion of the dash panel main body 15 with respect to the member gate shape portion 17 a by the dash panel reinforcing member 18.
Therefore, the front vehicle body structure of the vehicle 1 allows the suspension tower 5 to be attached to the suspension tower 5 by the dash panel reinforcement member 18 having the beads 182a that connect the legs 181a even when load energy is applied to the suspension towers 5 at different timings. Deformation of the dash panel 12 due to the applied load energy can be further suppressed.

In correspondence between the configuration of the present invention and the above-described embodiment,
The lower end corresponding to the tunnel of the present invention corresponds to the tunnel corresponding portion 15a of the embodiment,
Similarly,
The dash body corresponds to the dash panel body 15,
The member portal portion corresponds to the member portal shape portion 17a,
The reinforcing main body portion corresponds to the reinforcing member main body 181;
The leg corresponds to the leg 181a,
The connecting portion corresponds to the bead 182a,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

  For example, in the embodiment described above, the cowl box 13 in which the cross-sectional shape in the longitudinal section along the vehicle front-rear direction of the cowl lower 131 and the cowl upper 132 forms a closed section is not limited to this, but the front end of the coupling assisting member 20 is not limited thereto. As long as it has a shape having an inner surface to which the rear end is joined, for example, the cross-sectional shape in the longitudinal section along the vehicle front-rear direction may be an open cross-sectional shape with the vehicle upper part opened.

Moreover, although the dash panel reinforcing member 18 having a substantially portal shape in front view is used, the present invention is not limited to this, and the dash panel having a substantially inverted U shape in front view, a substantially inverted V shape in front view, or a substantially M shape in front view. It may be a reinforcing member.
In addition, although the heat shield inner portion 62 of the heat shield member 6 in which the heat shield inner upper portion 621 and the heat shield inner lower portion 622 are separately formed is used, the heat shield inner upper portion 621 and the heat shield inner are not limited thereto. A heat shield member inner integrally formed with the lower part 622 may be used.

DESCRIPTION OF SYMBOLS 1 ... Vehicle 2 ... Vehicle compartment 9 ... Hinge pillar 5 ... Suspension tower 10a ... Floor tunnel 12 ... Dash panel 13 ... Cowl box 15 ... Dash panel main body 15a ... Tunnel corresponding part 17 ... Dash cross member 17a ... Member portal type shape part 18 ... Dash panel reinforcing member 181 ... reinforcing member main body 181a ... leg 181b ... bridge 182 ... flat plate 182a ... bead

Claims (4)

A dash panel that forms a bulkhead in front of the vehicle in the vehicle compartment;
A pair of left and right hinge pillars connected to both ends of the dash panel and extending in the vehicle vertical direction;
A cowl box connected to the upper end of the dash panel and connecting the left and right hinge pillars in the vehicle width direction;
A vehicle front body structure including a suspension tower that supports an upper end of a front suspension damper,
The dash panel
In front view, a dash body having a tunnel-compatible lower end whose lower end protrudes upward in the vehicle corresponding to a floor tunnel disposed in the vicinity of the center in the vehicle width direction,
A dash cross member joined to the lower front surface of the dash body and connecting the lower portions of the left and right hinge pillars in the vehicle width direction;
A dash panel reinforcing member joined to the dash body above the vehicle above the dash cross member,
The dash cross member is
A member gate-shaped portion having a substantially gate-shaped shape in front view formed along the tunnel-corresponding lower end of the dash body,
The dash panel reinforcing member is
A front vehicle body structure of a vehicle in which a lower end is connected to the dash cross member across the member portal portion in a front view and an upper end is formed in a substantially portal shape close to the cowl box. The dash panel reinforcing member is
The front body structure of a vehicle according to claim 1, wherein the vehicle body is formed in a shape that forms a closed cross section with the dash body. The dash panel reinforcing member is
Reinforcing main body with a gate-like shape in front view,
The front body structure of a vehicle according to claim 1 or 2, which is integrally formed with a substantially flat plate portion disposed inside the reinforcing main body portion when viewed from the front. The dash panel reinforcing member is
In front view, a pair of left and right legs that extend upward from the lower end connected to the dash cross member; and
The upper ends of the leg portions are connected in the vehicle width direction, and the bridge portion whose upper ends are close to the cowl box;
The vehicle front body according to any one of claims 1 to 3, further comprising at least one connecting portion that connects the left and right leg portions in the vehicle width direction below the bridge portion. Construction.

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