JP2016000576A - Vehicle skeleton structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vehicle skeleton structure which can improve load transmission performance to a rear side of a vehicle body at a fine lap collision and an oblique collision.SOLUTION: A front end side of a gazette 60 is arranged inside a vehicle body width direction at a rear end side of a side member front part 36. The gazette 60 is connected to a front side member 34 and a dash panel 22. Second ridge lines 60L, 60M formed at the gazette 60 are sequentially arranged at first ridge lines 36L, 36M at vertical end edges at the inside of the vehicle body width direction of the side member front part 36, and inclined to the inside of the vehicle body width direction toward a vehicle body rear side.

Description

  The present invention relates to a vehicle skeleton structure.

  Patent Document 1 below discloses a vehicle structure in which a pair of left and right side members are provided at the front of a vehicle body. Briefly, at the front of the vehicle body, the rear ends of the pair of left and right side members are mounted on the front cross member, and the gusset coupled to the inner side in the vehicle width direction at the rear end of the side member is the front cross. Connected to the front end of the member.

International Publication No. 2013/150245 Pamphlet

  By the way, in the case of a minute lap collision in which the vehicle collides frontward from the side member in the vehicle width direction or in an oblique collision (oblique collision) in which a collision load is input from the oblique front side of the vehicle, the side member is moved inward in the vehicle width direction. The load to be bent acts on the. However, the above prior art has room for improvement in terms of efficiently transmitting such a load to the rear side of the vehicle body.

  An object of the present invention is to obtain a vehicle skeleton structure that can improve the load transmission to the vehicle body rear side at the time of a minute lap collision or an oblique collision in consideration of the above fact.

  The vehicle skeleton structure according to the first aspect of the present invention includes a dash portion that separates the power unit chamber and the cabin, and a side portion of the power unit chamber that extends in the longitudinal direction of the vehicle body and extends in the vehicle body width direction inside. A side member front portion having first ridge lines formed on upper and lower edges, and a kick portion extending to the rear lower side of the vehicle body along the dash portion are formed continuously to the rear end portion of the side member front portion. A front side member including a side member rear portion, and a front end portion side disposed on the inner side in the vehicle width direction of the rear end portion side of the side member front portion, coupled to the front side member and the dash portion, and And a gusset including a second ridge line that is continuously arranged on one ridge line and is inclined inward in the vehicle body width direction toward the vehicle body rear side.

  According to the above configuration, the gusset is disposed on the inner side in the vehicle width direction on the rear end portion side of the front portion of the side member, and is coupled to the front side member and the dash portion. For this reason, when a load is applied to bend the front side member inward in the vehicle body width direction, a part of the load is supported by the gusset. In addition, the second ridge line formed in the gusset is continuously arranged on the first ridge line on the upper and lower edge of the side member front portion in the vehicle body width direction and is inclined inward in the vehicle body width direction toward the rear side of the vehicle body. Yes. For this reason, at the time of a minute lap collision or oblique collision, the collision load is not only transmitted from the front side member to the rear side member, but also to the second ridge line of the gusset via the first ridge line on the front side member. Is also communicated. And the load transmitted to the 2nd ridgeline of a gusset is transmitted to the vehicle body rear side from the vehicle width direction center part of a dash part.

  The vehicle skeleton structure according to a second aspect of the present invention is the vehicle skeleton structure according to the first aspect, wherein the gusset is disposed in the power unit chamber, and an end portion on the outer side in the vehicle body width direction is an upper wall portion of the side member front portion. An upper wall coupled to the vehicle body, a lower wall facing the vehicle body lower side of the upper wall and having an end on the vehicle body width direction outer side coupled to the lower wall portion of the side member front portion, the upper wall, and the A lower wall is connected in the vertical direction of the vehicle body, and a vertical wall adjacent to the upper wall and the lower wall with the second ridge line in between is formed, and a closed cross section is formed by the front side member.

  According to the above configuration, the gusset sandwiches the side member front portion from above and below and forms a closed cross-sectional portion with the side member front portion. For this reason, when the load which tries to bend the side member front part to the vehicle body width direction inner side at the time of a collision acts, the cross-sectional deformation of the side member front part is effectively suppressed. Thereby, a part of the load is stably transmitted from the first ridge line to the second ridge line.

  A vehicle skeleton structure according to a third aspect of the present invention is the vehicle skeleton structure according to the second aspect, wherein the gusset is disposed on the vehicle body lower side of the dash portion, and from the end of the lower wall on the vehicle body rear side to the rear of the vehicle body. A lower extending wall that extends downward and has an outer end in the vehicle width direction coupled to the lower wall portion of the kick portion, and a vehicle body from the inner end in the vehicle width direction of the lower extending wall An inner side wall that is bent and extends upward and has an end on the vehicle body front side continuous with an end on the inner side in the vehicle width direction of the vertical wall, and an end on the vehicle rear side of the lower extension wall A rear wall which is bent and extended from the vehicle body to the vehicle body upper side, and an end portion on the vehicle body width direction inner side is continuous with the vehicle body rear side end portion of the inner wall, and each of the inner wall and the rear wall of the vehicle body A duck extending from the upper end and the end of the upper wall on the vehicle rear side and coupled to the dash portion. A front flange and a member-side flange extending from an outer end of each of the vertical wall and the rear wall in the vehicle width direction and coupled to the front side member. A closed space is formed together with the part.

  According to the said structure, the gusset is extended to the vehicle body lower side of the dash part, and forms the closed space with the front side member and the dash part as a whole. For this reason, when the load which tries to bend the front side member in the vehicle body width direction acts, and a part of the load is supported by the gusset, the deformation of the gusset is effectively suppressed. Thereby, the deformation of the front side member is further suppressed, and a part of the load is stably transmitted along the second ridge line.

  A vehicle skeleton structure according to a fourth aspect of the present invention is the structure according to any one of the first to third aspects, wherein the vehicle skeleton structure is formed from the rear end portion of the front portion of the side member to the upper portion of the kick portion. The bent portion includes a widened portion in which the width in the vertical direction of the vehicle body is set to be longer than that of the front portion of the vehicle body in the front side member, and the gusset is disposed adjacent to the widened portion. .

  According to the above configuration, the widened portion of the front side member is set to have a longer width in the vehicle body vertical direction than the bent front portion of the front side member, and the gusset has a widened width of the front side member. It is arranged adjacent to the part. For this reason, the width of the gusset in the vertical direction of the vehicle body is set longer according to the widened portion of the front side member, and when a load acts to bend the front side member in the vehicle body width direction, the front side member is more deformed. Effectively suppressed. As a result, the load transmission efficiency is further improved.

  A vehicle skeleton structure according to a fifth aspect of the present invention is the structure according to any one of the first to fourth aspects, wherein the rear side member and the floor tunnel portion are provided on the vehicle body rear side of the gusset. An inner torque box that connects the peripheral edge of the opening is disposed, and an end of the gusset on the vehicle body rear side is coupled to the inner torque box.

  According to the said structure, the inner torque box arrange | positioned at the vehicle body back side of a gusset has connected the side member rear part and the opening peripheral part of the floor tunnel part. For this reason, a part of the load transmitted to the rear part of the side member is transmitted to the floor tunnel part side via the inner torque box. Further, since the end of the gusset on the vehicle body rear side is coupled to the inner torque box, a part of the load transmitted to the gusset is transmitted to the floor tunnel portion side via the inner torque box.

  A vehicle skeleton structure according to a sixth aspect of the present invention is the structure according to any one of the first to fifth aspects, wherein an end of the gusset on the inner side in the vehicle width direction is provided in the dash portion. The floor tunnel portion is connected to the opening peripheral edge portion of the dash tunnel portion connected to the floor tunnel portion.

  According to the said structure, a part of load transmitted to the gusset is efficiently transmitted to a floor tunnel part through a dash tunnel part.

  As described above, according to the vehicle skeleton structure of the present invention, there is an excellent effect that it is possible to improve the load transmission property to the rear side of the vehicle body at the time of a minute lap collision or an oblique collision.

1 is a perspective view showing a part of a right side of a vehicle body of a vehicle skeleton structure according to an embodiment of the present invention as viewed from an obliquely upper side of a vehicle. It is a perspective view which expands and shows a part of vehicle frame structure of FIG. 1 in the state seen from the vehicle diagonally lower side. FIG. 3 is an enlarged cross-sectional view taken along line 3-3 in FIG. 1. It is a top view which shows a part of vehicle skeleton structure of FIG. It is a bottom view which shows a part of vehicle frame structure of FIG.

  A vehicle skeleton structure 10 according to an embodiment of the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle body front side, an arrow UP indicates the vehicle body upper side, and an arrow OUT indicates the vehicle body width direction outer side. Hereinafter, when simply using the front-rear, up-down, left-right directions, unless otherwise noted, the front-rear direction of the vehicle body, the up-down direction of the vehicle body direction, and the left-right direction when facing the traveling direction are shown.

(Configuration of the embodiment)
FIG. 1 is a perspective view of a part of the right side of a vehicle body 12 of an automobile (vehicle) 12 to which the vehicle skeleton structure 10 is applied as seen from the obliquely upward side of the vehicle body. Although illustration of the left side of the vehicle body is omitted in the figure, the vehicle skeleton structure 10 is basically configured symmetrically. As shown in FIG. 1, in the automobile 12, a power unit chamber 16 and a cabin (vehicle compartment) 18 are separated by a dash portion 20. The dash portion 20 is configured to include a dash panel (vehicle body front wall) 22. The upper portion of the dash panel 22 is a vertical plate portion 22A formed in a substantially vertical plate shape. The lower portion of the dash panel 22 is a toe board portion 22B that is integrally formed with the vertical plate portion 22A and is formed in an inclined plate shape. The toe board portion 22B is inclined toward the vehicle body rear side toward the vehicle body lower side.

  A front end portion of a floor panel (vehicle body floor) 24 is joined to and integrated with a lower end portion of the toe board portion 22B by welding or the like. That is, the floor panel 24 is connected to the lower side of the dash panel 22 and extends rearward of the vehicle body. The floor panel 24 constitutes the floor surface of the cabin 18. As shown in FIG. 5, which is a bottom view of the vehicle skeleton structure 10, the end of the floor panel 24 on the outer side in the vehicle width direction is coupled to a rocker (also referred to as “side sill”) 28. The rocker 28 is a skeleton member having a closed cross-sectional structure extending in the longitudinal direction of the vehicle body at the lower end portion of the vehicle body side portion, and is disposed in a range including the lower edge side of the side door opening.

  As shown in FIG. 1, a dash tunnel portion 22 </ b> T is formed in the vehicle width direction center portion of the toe board portion 22 </ b> B of the dash panel 22. The dash tunnel portion 22T is formed in a substantially U shape opened to the vehicle body lower side. A tunnel-like floor tunnel portion 24T formed at the center in the vehicle width direction of the floor panel 24 is connected to the rear end portion side of the dash tunnel portion 22T. The rear end portion of the dash tunnel portion 22T and the front end portion of the floor tunnel portion 24T are integrated with each other. The floor tunnel portion 24T extends along the longitudinal direction of the vehicle body to reinforce the lower portion of the vehicle body, and constitutes the tunnel portion 26 together with the dash tunnel portion 22T. In other words, the tunnel portion 26 extends in the vehicle body front-rear direction at the vehicle width direction central portion at the lower portion of the vehicle body. In the figure, the component on the left side of the vehicle body of the tunnel portion 26 is indicated by a two-dot chain line.

  The power unit chamber 16 is formed on the front side of the vehicle body with respect to the cabin 18. A power unit 14 (see FIG. 4) is accommodated in the power unit chamber 16. In this embodiment, the power unit 14 (see FIG. 4) includes an engine and a motor as an example. That is, the automobile 12 is a hybrid automobile having two drive sources. The power unit chamber 16 can be regarded as a so-called engine compartment.

  A pair of left and right front side members 34 are provided on both sides in the vehicle width direction at the lower portion of the power unit chamber 16. The front side member 34 will be described later. A bumper reinforcement 32 is fixed to the front end portion of the front side member 34. A crash box may be interposed between the front end portion of the front side member 34 and the bumper reinforcement 32.

  The bumper reinforcement 32 is disposed in the vehicle body front portion 12A with the vehicle body width direction as a longitudinal direction, and has a bumper extension portion 32A that extends outward from the front side member 34 in the vehicle body width direction. Note that an absorber (not shown) made of foam or the like is attached to the front end surface of the bumper reinforcement 32, and this absorber and the bumper reinforcement 32 are covered with a bumper cover (not shown), so that the front bumper is It is configured.

  The front side member 34 includes a side member front portion 36 that is disposed on a side portion of the power unit chamber 16 and extends in the front-rear direction of the vehicle body. The side member front portion 36 includes a side member inner portion 44 disposed on the inner side in the vehicle body width direction and a side member outer portion 46 disposed on the outer side in the vehicle body width direction to form a closed cross-sectional portion extending in the vehicle body front-rear direction. The first ridge lines 36L and 36M are formed on the upper and lower end edges in the vehicle body width direction. The pair of left and right side member front portions 36 support the power unit 14 (see FIG. 4) via an engine mount (not shown).

  The side member inner portion 44 is formed in a hat shape in which a cross-sectional shape when cut along the vehicle body width direction is opened outward in the vehicle body width direction. The side member inner portion 44 includes an inner side wall portion 44A that constitutes a side surface in the vehicle width direction of the side member front portion 36, an inner upper wall portion 44B that constitutes an upper surface of the side member front portion 36, and the side member front portion 36. An inner lower wall portion 44C (see FIG. 2) constituting the lower surface of the inner wall. A vertical wall-shaped upper flange 44D extends from the end of the inner upper wall portion 44B on the outer side in the vehicle body width direction.

  FIG. 2 is a perspective view of a part of the vehicle skeleton structure 10 as seen from the obliquely lower side of the vehicle body. As shown in FIG. 2, a vertical flange-like lower flange 44E extends from the end of the inner lower wall portion 44C on the outer side in the vehicle width direction to the vehicle body lower side. The first ridge line 36L on the inner side in the vehicle body width direction of the side member front portion 36 is a boundary portion between the outer surface of the inner side wall portion 44A and the outer surface of the inner upper wall portion 44B. Further, the first ridge line 36M on the lower side in the vehicle body width direction of the side member front portion 36 is a boundary portion between the outer surface of the inner side wall portion 44A and the outer surface of the inner lower wall portion 44C.

  The side member outer portion 46 is formed in a vertical wall shape and closes the open side of the side member inner portion 44. That is, the upper end portion of the side member outer portion 46 is overlapped and joined to the upper flange 44D of the side member inner portion 44, and the lower end portion of the side member outer portion 46 is overlapped to the lower flange 44E of the side member inner portion 44. Are combined.

  Further, the front side member 34 includes a side member rear portion 38 that constitutes the vehicle body rear side with respect to the side member front portion 36. The side member rear portion 38 is formed with a kick portion 40 that is continuous with the rear end portion of the side member front portion 36 and extends to the vehicle body rear lower side along the dash portion 20 (the toe board portion 22B of the dash panel 22). Yes. The kick portion 40 is disposed on the lower side of the toe board portion 22B, and a cross-sectional shape when cut along a plane orthogonal to the longitudinal direction of the kick portion 40 is formed in a hat shape opened to the toe board portion 22B side. Yes. The flange portions on both sides of the kick portion 40 are overlapped and coupled to the toe board portion 22B.

  As shown in FIG. 1, the bent portion 48 formed from the rear end portion of the side member front portion 36 to the upper portion of the kick portion 40 includes a widened portion 48A. The widened portion 48 </ b> A is set to have a longer width in the vertical direction of the vehicle body than the portion of the front side member 34 on the front side of the vehicle body than the bent portion 48.

  As shown in FIG. 2, the side member rear portion 38 includes a floor under portion (rear member portion) 42 that is continuous with the rear end portion of the kick portion 40 and extends to the rear side of the vehicle body on the lower side of the floor panel 24. Yes. The floor under section 42 is formed in a hat shape in which a cross-sectional shape when cut along the vehicle body width direction is opened to the floor panel 24 side. The flange portions on both sides of the floor under portion 42 are overlapped and joined to the floor panel 24.

  A tunnel reinforcement 30 is disposed on the inner side in the vehicle width direction with respect to the floor under portion 42. The tunnel reinforcement 30 is formed in a hat shape that is disposed on both sides of the floor tunnel portion 24T, extends in the longitudinal direction of the vehicle body, and has a cross-sectional shape that is open along the vehicle body width direction. Has been. The flange portions on both sides of the tunnel reinforcement 30 are coupled to the lower surface of the floor panel 24. The flange portion on the inner side in the vehicle width direction of the tunnel reinforcement 30 is overlapped with the opening peripheral portion 24S of the floor tunnel portion 24T (in a broad sense, the opening peripheral portion 26A of the tunnel portion 26).

  The side member rear portion 38 and the opening peripheral edge portion 24S of the floor tunnel portion 24T are connected by an inner torque box 50. As shown in FIG. 5, the inner torque box 50 is formed so that the extending direction from the portion overlapping the side member rear portion 38 in the bottom view of the vehicle body gradually changes from the direction toward the vehicle body width direction toward the vehicle body rear side. In the part which overlaps with the opening peripheral part 24S of the floor tunnel part 24T, it has extended toward the vehicle body rear side. Further, the inner torque box 50 is formed in a hat shape in which a cross-sectional shape when cut along a plane orthogonal to the longitudinal direction is opened to the upper side of the vehicle body, except for the terminal flange 50A on the outer side in the vehicle body width direction and the rear part. Yes.

  An end portion of the inner torque box 50 on the outer side in the vehicle width direction is overlapped with a lower end portion of the kick portion 40 and a front end portion of the floor under portion 42 from the lower side of the vehicle body, and a predetermined portion is coupled. The terminal flange 50A on the outer side in the vehicle width direction of the inner torque box 50 is overlapped and coupled to the lower surface of the lower end portion of the kick portion 40 and the lower surface of the front end portion of the floor under portion 42. On the other hand, the inner end portion of the inner torque box 50 in the vehicle body width direction is overlapped and coupled to the front end portion of the tunnel reinforcement 30 and the opening peripheral edge portion 24S of the floor tunnel portion 24T from the lower side of the vehicle body. Further, the vehicle width direction intermediate portion of the inner torque box 50 is overlapped and coupled to the lower end portion of the toe board portion 22B and the front end portion of the floor panel 24 from the lower side of the vehicle body.

  On the vehicle body rear side with respect to the end portion of the inner torque box 50 on the outer side in the vehicle body width direction, the end portion on the inner side of the outer torque box 52 in the vehicle body width direction is disposed adjacently. The outer torque box 52 connects the side member rear portion 38 and the rocker 28.

  On the other hand, as shown in FIG. 1, the front end side of the gusset 60 (which is also an element grasped as a “support member”) is disposed on the inner side in the vehicle width direction on the rear end side of the side member front portion 36. Has been. The gusset 60 includes a portion disposed adjacent to the widened portion 48 </ b> A, and the rear end portion side is disposed on the inner side in the vehicle width direction of the kick portion 40. The above-described inner torque box 50 (see FIG. 2) is disposed on the rear side of the vehicle body of the gusset 60. The gusset 60 is coupled to the front side member 34 and the dash panel 22 (dash portion 20), and is continuously disposed on the first ridges 36L and 36M of the side member front portion 36 so as to extend toward the vehicle body rear side. Second ridge lines 60L and 60M that are inclined inward in the direction are provided. Hereinafter, the gusset 60 will be described more specifically.

  As shown in FIG. 2, the gusset 60 includes an upper wall 62, a vertical wall 66, and a lower wall 64 as front side components. The upper wall 62 is disposed in the power unit chamber 16 to constitute the upper surface of the gusset 60, and the lower wall 64 is disposed to face the vehicle body lower side of the upper wall 62. The upper wall 62 and the lower wall 64 are generally formed in a triangular plate shape. The upper wall 62 has an end along the second ridgeline 60L, and the lower wall 64 has an end along the second ridgeline 60M.

  As shown in FIGS. 3 and 2, which are enlarged sectional views taken along the line 3-3 in FIG. 1, the upper flange 62 </ b> F that is the end of the upper wall 62 on the outer side in the vehicle width direction is It is superimposed on the upper surface of the rear end portion of the inner upper wall portion 44B and joined by spot welding. Accordingly, a part of the first ridge line 36 </ b> L on the upper side of the side member front portion 36 is covered with the upper wall 62 of the gusset 60. In FIG. 2, spot welding points are indicated by “x” marks. On the other hand, the front lower flange 64F, which is an end portion of the lower wall 64 on the outer side in the vehicle width direction, is overlapped with the lower surface of the rear end portion of the inner lower wall portion 44C in the side member front portion 36 and coupled by spot welding. . Accordingly, a part of the first ridge line 36 </ b> M on the lower side of the side member front portion 36 is covered with the lower wall 64 of the gusset 60.

  An end portion along the second ridge line 60 </ b> L of the upper wall 62 and an end portion along the second ridge line 60 </ b> M of the lower wall 64 are connected to the vertical direction of the vehicle body by the vertical wall 66. That is, the outer surface of the vertical wall 66 is adjacent to the outer surface of the upper wall 62 with the second ridge line 60 </ b> L interposed therebetween and is adjacent to the outer surface of the lower wall 64 with the second ridge line 60 </ b> M interposed therebetween. As described above, the closed cross-sectional portion 74 is formed by the front side configuration portion of the gusset 60 and the side member front portion 36.

  As shown in FIG. 2, the upper second ridge line 60L and the lower second ridge line 60M are set substantially parallel to each other. The terminal position on the inner side in the vehicle width direction of the upper second ridge line 60L is set to a position adjacent to the opening peripheral edge 22S of the dash tunnel 22T.

  An inward bend line that is a boundary between the inner surface of the vertical wall 66 and the inner surface of the upper wall 62 is continuously arranged on the first ridge line 36L on the inner side in the vehicle body width direction of the side member front portion 36. Further, an inner bending line that is a boundary between the inner surface of the vertical wall 66 and the inner surface of the lower wall 64 is continuously arranged on the first ridge line 36M on the lower side in the vehicle body width direction of the side member front portion 36.

  Further, a front flange 66F is formed as a member-side flange that is bent and extended from the end of the vertical wall 66 on the outer side in the vehicle width direction. The front flange 66F is overlapped with the inner side surface in the vehicle width direction of the rear end portion of the inner side wall portion 44A in the side member front portion 36, and is joined by spot welding. A dash-side first flange 62A (dash-side flange) that is bent and extended from the end of the upper wall 62 on the vehicle body rear side to the vehicle body upper side is formed. The dash side first flange 62A is overlapped with the lower end portion of the vertical plate portion 22A of the dash panel 22 from the front side of the vehicle body and joined by spot welding.

  Next, the rear side component of the gusset 60 will be described. The rear side configuration portion of the gusset 60 is disposed on the vehicle body lower side of the toe board portion 22B (dash portion 20), and extends to the vehicle body rear lower side from the end of the lower wall 64 on the vehicle body rear side so as to face the toe board portion 22B. The lower extending wall 68 is provided. As shown in FIG. 5, the outer edge of the lower extending wall 68 on the outer side in the vehicle width direction extends in the vehicle front-rear direction in the bottom view. Further, the inner edge in the vehicle width direction of the lower extension wall 68 extends in the vehicle front-rear direction in a bottom view, and the rear edge of the lower extension wall 68 in the vehicle width direction outward in the vehicle bottom view. It is slightly inclined toward the rear of the vehicle body.

  As shown in FIG. 2, the rear lower flange 68F, which is the end of the lower extending wall 68 on the outer side in the vehicle width direction, is overlapped with the lower wall portion 40C of the kick portion 40 and joined by spot welding. Yes. Accordingly, a part of the lower end edge of the kick portion 40 on the inner side in the vehicle width direction is covered with the lower extending wall 68 of the gusset 60.

  Further, an inner side wall 70 is formed so as to be bent and extended toward the toe board portion 22B side (the upper side of the vehicle body) from the end of the lower extension wall 68 on the inner side in the vehicle width direction. The end of the inner wall 70 on the vehicle body front side is continuous with the end of the vertical wall 66 on the inner side in the vehicle width direction. A dash side second flange 70F (dash side flange) that is bent and extended inward in the vehicle body width direction is formed from the end of the inner wall 70 on the toe board portion 22B side (vehicle body upper side). The dash side second flange 70F is overlapped with the opening peripheral portion 22S of the dash tunnel portion 22T of the toe board portion 22B from the lower side of the vehicle body and coupled by spot welding. The end of the dash side second flange 70F on the vehicle body front side is continuous with the end of the dash side first flange 62A on the inner side in the vehicle width direction.

  Further, a rear wall 72 that is bent and extended from the end of the lower extension wall 68 on the vehicle rear side to the toe board portion 22B side (vehicle upper side) is formed. The end of the rear wall 72 on the inner side in the vehicle width direction is continuous with the end of the inner wall 70 on the vehicle body rear side. A dash-side third flange 72A (dash-side flange) is formed to bend and extend from the end of the rear wall 72 on the toe board portion 22B side (vehicle body upper side) to the vehicle body rear side. The dash side third flange 72A (the end portion on the rear side of the vehicle body) is overlapped with the lower end portion of the toe board portion 22B and a part of the front flange 50B of the inner torque box 50 from the lower side of the vehicle body and joined by spot welding. . The end of the dash side third flange 72A on the inner side in the vehicle width direction is continuous with the end of the dash side second flange 70F on the vehicle rear side.

  A rear flange 72F is formed as a member-side flange that is bent and extended from the end of the rear wall 72 on the outer side in the vehicle width direction. The rear flange 72F (the end on the rear side of the vehicle body) is overlapped with the side wall portion 40A on the vehicle width direction inner side of the kick portion 40 and a part of the front flange 50B of the inner torque box 50 from the inner side in the vehicle width direction by spot welding. Are combined.

  As described above, the gusset 60 forms a closed space 76 together with the front side member 34 and the dash panel 22 (dash portion 20).

  Further, in the present embodiment, the coupling position of the gusset 60 to the front side member 34 is a position where the front side member 34 is desired to be bent and deformed in a Z shape in a vehicle plan view at the time of full lap collision or offset collision (inner side in the vehicle width direction). (Folding position). Further, from the viewpoint of supporting the front side member 34 with the gusset 60, the coupling position of the gusset 60 to the front side member 34 is set to the nearest rear side of the component part relatively close to a rigid body. Examples of components that are relatively close to a rigid body include suspension parts such as a suspension (not shown), the power unit 14 (see FIG. 4), and the like.

(Operation and effect of the embodiment)
Next, the operation and effect of the above embodiment will be described. In the following, the operation when a collision body (barrier) collides with one side in the vehicle width direction of the automobile 12 will be mainly described. Examples of such a collision include a minute lap collision and an oblique collision (oblique collision).

  As shown in FIG. 4, which is a plan view showing a part of the vehicle skeleton structure 10, when the automobile 12 collides with the barrier A with a minute lap, or when the automobile 12 collides with the barrier B obliquely, the vehicle of the bumper reinforcement 32. A collision load (see arrows F1 and F2) is input to the outer portion in the width direction. Then, the load (see arrow F3) transmitted from the bumper reinforcement 32 to the front side member 34 tends to bend so as to tilt the front side member 34 inward in the vehicle body width direction.

  Here, in the vehicle skeleton structure 10 according to the present embodiment, the front end portion side of the gusset 60 is disposed on the inner side in the vehicle width direction on the rear end portion side of the side member front portion 36, and the gusset 60 includes the front side member 34 and the dash. It is coupled to the part 20. That is, the gusset 60 improves the coupling rigidity between the front side member 34 and the dash portion 20. For this reason, when a load is applied to bend the front side member 34 inward in the vehicle body width direction, a part of the load is supported by the gusset 60 (front side member support structure). In addition, the front side member 34 can be prevented from falling or inwardly deformed in the vehicle width direction at the time of a minute lap collision or an oblique collision. As a result, the front side member 34 can be bent and deformed at a desired position, so that efficient energy absorption can be performed. In addition, according to this embodiment, the steering stability of a vehicle can also be improved because the rigidity with respect to the lateral bending of the front side member 34 improves.

  Further, as shown in FIG. 4 and FIG. 5 which is a bottom view showing a part of the vehicle skeleton structure 10, the second ridge lines 60 </ b> L and 60 </ b> M formed on the gusset 60 are inside the vehicle body width direction of the side member front portion 36. The first ridge lines 36L and 36M of the upper and lower end edges are continuously disposed and inclined inward in the vehicle body width direction toward the vehicle body rear side. For this reason, the collision load is transmitted not only from the side member front part 36 to the side member rear part 38 (see arrow F4), but also from the upper and lower first ridge lines 36L and 36M on the inner side in the vehicle body width direction of the side member front part 36. To the second ridge lines 60L and 60M of the gusset 60 (see arrow F5). That is, the load can be distributed and transmitted. Then, the load (F5) transmitted to the second ridge lines 60L and 60M of the gusset 60 is transmitted from the center portion in the vehicle body width direction of the dash portion 20 along the tunnel portion 26 to the vehicle body rear side.

  Here, in the present embodiment, as shown in FIG. 5, the dash side second flange 70 </ b> F (end portion on the inner side in the vehicle body width direction) of the gusset 60 is coupled to the opening peripheral edge portion 22 </ b> S of the dash tunnel portion 22 </ b> T. . For this reason, a part of the load transmitted to the gusset 60 is efficiently transmitted to the floor tunnel portion 24T through the dash tunnel portion 22T (see arrow F6).

  In the present embodiment, as shown in FIG. 3, the gusset 60 sandwiches the side member front portion 36 from above and below and forms a closed cross-sectional portion 74 with the side member front portion 36. For this reason, when the load which tries to bend the side member front part 36 to the vehicle body width direction inner side at the time of a collision acts, the cross-sectional deformation of the side member front part 36 is effectively suppressed. Thereby, part of the load is stably transmitted from the first ridge lines 36L and 36M shown in FIG. 2 to the second ridge lines 60L and 60M.

  In the present embodiment, the gusset 60 extends to the vehicle body lower side of the toe board portion 22 </ b> B, and forms a closed space 76 together with the front side member 34 and the dash panel 22 as a whole. For this reason, when the load which tries to bend the front side member 34 to the vehicle body width direction inner side acts and a part of the load is supported by the gusset 60, the deformation | transformation of the gusset 60 is suppressed effectively. Accordingly, the deformation of the front side member 34 is further suppressed, and a part of the load is stably transmitted along the second ridge lines 60L and 60M.

  Further, in the present embodiment, the widened portion 48A of the front side member 34 is set to have a longer width in the vertical direction of the vehicle body than the portion of the front side member 34 on the front side of the vehicle body than the bent portion 48. The front side member 34 is disposed adjacent to the widened portion 48A. For this reason, the width of the gusset 60 in the vertical direction of the vehicle body is set to be long according to the widened portion 48A of the front side member 34, and when a load is applied to bend the front side member 34 in the vehicle width direction, the front side member The deformation of 34 is more effectively suppressed. As a result, the load transmission efficiency is further improved.

  In the present embodiment, as shown in FIG. 5, an inner torque box 50 disposed on the rear side of the vehicle body of the gusset 60 connects the side member rear portion 38 and the opening peripheral edge portion 24S of the floor tunnel portion 24T. . For this reason, a part of the load transmitted to the side member rear portion 38 is transmitted to the floor tunnel portion 24T side (tunnel reinforcement 30) via the inner torque box 50 (see arrow F7). In addition, since the end of the gusset 60 on the vehicle body rear side is coupled to the inner torque box 50, a part of the load transmitted to the gusset 60 is connected to the floor tunnel portion 24T side (tunnel) via the inner torque box 50. To the reinforcement 30) (see arrow F8).

  As described above, according to the vehicle skeleton structure 10 according to the present embodiment, it is possible to improve the load transmission property to the vehicle body rear side at the time of a minute lap collision or an oblique collision.

  As a supplementary explanation from another point of view, as a structure for suppressing the deformation of the front side member (34) inward in the vehicle body width direction at the time of a minute lap collision or an oblique collision, for example, the left and right side member front portions (36) A structure is conceivable in which side portions on the inner side in the vehicle body width direction at the rear end portion are connected by a cross member. However, since various members such as the power unit (14), piping, brakes, steering, etc. are attached to the front side of the dash panel (22), the cross member is adjacent to the front side of the dash panel (22). It is often difficult to arrange. Further, disposing such a cross member is disadvantageous in terms of an increase in mass.

  On the other hand, in the vehicle skeleton structure 10 according to the present embodiment, even when the cross member cannot be disposed, the above-described functions and effects can be achieved while suppressing an increase in mass.

  Moreover, since the load at the time of a collision is distributed like this embodiment, the load burden of the side member rear part 38 can be reduced, Therefore The mass increase of the side member rear part 38 grade | etc., Can be suppressed.

  Further, in the present embodiment, the load of the side member front portion 36 can be dispersed by the gusset 60 and the front side member 34 can be bent and deformed at a desired position even at the time of full lap collision or offset collision. .

(Supplementary explanation of the embodiment)
As a modification of the above embodiment, the dash portion may include a dash panel 22 and a dash cross member that is coupled to the dash panel 22 and extends in the vehicle body width direction. The dash cross member of the modified example may have an end on the outer side in the vehicle width direction coupled to the front pillar. Further, the dash cross member of the modified example may be convex toward the power unit chamber, and in such a configuration, the rear side portion of the gusset may be coupled to the dash cross member.

  Moreover, in the said embodiment, although the power unit 14 arrange | positioned in the power unit chamber 16 showed as an example the structure containing an engine and a motor, the power unit arrange | positioned in a power unit chamber is equipped with an engine like an engine vehicle, for example. It may be a power unit having another configuration such as a configuration that does not include a motor or a configuration that includes a motor and does not include an engine, such as an electric vehicle.

  In the above embodiment, the case where the vehicle skeleton structure 10 is basically configured symmetrically and the gusset 60 is provided on both the left and right sides of the vehicle body has been described. For example, the gusset (60) is the vehicle body. A configuration provided only on the left side and a configuration provided with the gusset (60) only on the right side of the vehicle body may be employed.

  As a modification of the above embodiment, a reinforcing member may be arranged in the cross section of the gusset. Moreover, the shape extended along the 2nd ridgeline 60L may be sufficient as the reinforcement member arrange | positioned in the cross section of a gusset, and the shape extended along the 2nd ridgeline 60M may be sufficient as it. The gusset itself may be provided with a reinforcing structure such as a reinforcing bead extending along the second ridge line 60L, or the gusset itself may be provided with a reinforcing structure such as a reinforcing bead extending along the second ridge line 60M. Also good. When a reinforcing structure is provided in the gusset itself, a separate reinforcing member may be disposed within the cross section of the gusset, or a separate reinforcing member may not be disposed within the cross section of the gusset.

  Further, as a modification of the above embodiment, the gusset includes, for example, a lower extension wall 68, an inner wall 70, a dash side second flange 70F, a rear wall 72, a dash side third flange 72A and a rear side shown in FIG. A structure that does not include each component of the flange 72F is also possible. Further, in the structure of such a modified example, the end portion of the upper wall 62 on the vehicle body rear side and the end portion of the lower wall 64 on the vehicle body rear side are connected in the vertical direction of the vehicle body and are continuous with the dash side first flange 62A. A rear wall may be provided.

  As another modification, the gusset includes, for example, a box portion formed in a substantially triangular prism shape, and the side surface on the outer side in the vehicle body width direction of the box portion is the inner side wall portion (44A) of the side member front portion (36). It is also possible to make other gussets such that a flange extending from the box part and a dash part (20) is connected to the box part.

  In the above embodiment, the gusset 60 is configured to include a portion disposed adjacent to the widened portion 48A of the front side member 34, but the bent portion of the front side member has a shape that does not include the widened portion (48A). There may be.

  Further, as a modification of the above-described embodiment, a configuration in which the inner torque box 50 is not disposed can be employed. As another modified example, a configuration in which an end portion of the gusset on the vehicle body rear side is not coupled to the inner torque box may be employed. Furthermore, as another modification, a configuration in which the tunnel reinforcement 30 is not arranged or a configuration in which the inner torque box is not coupled to the tunnel reinforcement can be adopted.

  Further, as a modified example of the above-described embodiment, a configuration in which the end of the gusset on the inner side in the vehicle width direction is not coupled to the opening peripheral edge of the dash tunnel portion may be employed.

  In addition, in order to avoid interference with a gusset and another member, the 2nd ridgeline of a gusset may be curving in part or all. In order to avoid interference between the gusset and other members, a part of the gusset may be recessed (for example, curved).

  Furthermore, the concept of “continuously arranged on the first ridgeline” according to claim 1 includes, in addition to the case of being arranged completely continuously on the first ridgeline, for example, as in the above embodiment. Including the case where it is arranged on one ridge line 36L, 36M so as to be continuous through a step corresponding to the thickness of the gusset 60, that is, it is grasped as being substantially arranged on the first ridge line. It is.

  In addition, the said embodiment and the above-mentioned some modification can be implemented combining suitably.

  Although an example of the present invention has been described above, the present invention is not limited to the above, and it is needless to say that various modifications can be made without departing from the spirit of the present invention. .

DESCRIPTION OF SYMBOLS 10 Vehicle frame structure 16 Power unit room 18 Cabin 20 Dash part 22T Dash tunnel part 22S Opening peripheral part of dash tunnel part 24T Floor tunnel part 24S Opening peripheral part of floor tunnel part 34 Front side member 36 Side member front part 36L First ridge line 36M First ridge line 38 Side member rear part 40 Kick part 40C Lower wall part of kick part 44B Inner upper wall part (upper wall part of side member front part)
44C Inner bottom wall (bottom wall of the front side member)
48 bent portion 48A widened portion 50 inner torque box 60 gusset 60L second ridge line 60M second ridge line 62 upper wall 62A dash side first flange (dash side flange)
64 Lower wall 66 Vertical wall 66F Front flange (member side flange)
68 Lower extension wall 70 Inner wall 70F Dash side second flange (dash side flange, end on the inner side in the vehicle width direction)
72 Rear wall 72A Dash side third flange (dash side flange, end of vehicle body rear side)
72F Rear flange (member side flange, rear end of vehicle body)
74 Closed section 76 Closed space

Claims (6)

A dash section separating the power unit room and the cabin;
A side member front portion disposed at a side portion of the power unit chamber and extending in the longitudinal direction of the vehicle body and having a first ridge line formed at an upper and lower end edge inside the vehicle body width direction, and a rear end portion of the side member front portion A front side member comprising: a side member rear portion formed with a kick portion that continuously extends along the dash portion to the vehicle body rear lower side;
A front end side is disposed on the vehicle width direction inner side of the rear end side of the side member front portion, and is coupled to the front side member and the dash portion, and is continuously disposed on the first ridge line so as to be rearward of the vehicle body. A gusset having a second ridge line inclined inward in the vehicle body width direction toward
A vehicle skeleton structure. The gusset is
An upper wall disposed in the power unit chamber and having an end on the outer side in the vehicle body width direction coupled to an upper wall portion of the front side member;
A lower wall facing the vehicle body lower side of the upper wall and having an end on the vehicle body width direction outer side coupled to the lower wall portion of the side member front portion,
A vertical wall that connects the upper wall and the lower wall in the vertical direction of the vehicle body and that is adjacent to the upper wall and the lower wall with the second ridge line in between,
The vehicle skeleton structure according to claim 1, wherein a closed cross-sectional portion is formed with the front side portion of the side member. The gusset is
The dash portion is disposed on the vehicle body lower side, extends from the vehicle body rear side end portion of the lower wall to the vehicle body rear lower side, and the vehicle body width direction outer end portion is coupled to the kick portion lower wall portion. A lower extending wall,
An inner side of the lower wall extending from the inner end in the vehicle width direction is bent and extended toward the upper side of the vehicle body, and the front end of the vertical wall is continuous with the inner end of the vertical wall in the vehicle width direction. With walls,
A rear wall that is bent and extended from the vehicle rear side end of the lower extension wall to the vehicle body upper side, and an inner side end in the vehicle width direction is continuous with the vehicle rear side end of the inner wall When,
A dash-side flange extending from a vehicle body upper side end portion of each of the inner wall and the rear wall and a vehicle body rear side end portion of the upper wall and coupled to the dash portion;
A member-side flange extending from the outer end of each of the vertical wall and the rear wall in the vehicle width direction and coupled to the front side member;
The vehicle skeleton structure according to claim 2, further comprising a front space member and a dash portion. The bent portion formed from the rear end portion of the front portion of the side member to the upper portion of the kick portion is set to have a longer width in the vertical direction of the vehicle body than the bent front portion of the front side member. With a widened section,
The vehicle skeleton structure according to any one of claims 1 to 3, wherein the gusset is disposed adjacent to the widened portion. On the vehicle body rear side of the gusset, an inner torque box for connecting the rear portion of the side member and the opening peripheral portion of the floor tunnel portion is disposed,
The vehicle skeleton structure according to any one of claims 1 to 4, wherein an end portion of the gusset on a vehicle body rear side is coupled to the inner torque box.   The end of the gusset on the inner side in the vehicle body width direction is connected to an opening peripheral portion of a dash tunnel portion provided at the dash portion and connected to a floor tunnel portion. The vehicle skeleton structure according to the item.

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