JP6597673B2 - Front body structure of the vehicle - Google Patents

Description

  The present invention belongs to a technical field related to a front body structure of a vehicle.

  In recent years, when the vehicle collides frontward in the vehicle width direction outside of one of the pair of left and right front side frames provided at the front of the vehicle, the collision load is applied to the vehicle interior of the vehicle. Various measures for making it difficult to be transmitted to the Internet have been proposed. The front collision of the vehicle as described above is called a small overlap collision or a minute lap collision.

  For example, in Patent Document 1, an outer protrusion that protrudes outward in the vehicle width direction of the front side frame through an outer opening that opens outward in the vehicle width direction of the front side frame in the cross section of the front portion of the front side frame. The load transmitting member having a load is fixed, and the load transmitting member is brought into contact with the side wall on the outer side in the vehicle width direction of the front side frame from the vehicle front side. The load is transmitted from the load transmitting member to the front side frame, and the front side frame is bent inward in the vehicle width direction.

Japanese Patent No. 5858006

  However, the configuration of Patent Document 1 is insufficient as a countermeasure for making it difficult to transmit the collision load at the time of a small overlap collision of the vehicle to the vehicle interior of the vehicle, and there is room for improvement. That is, in the configuration of Patent Document 1, the front side frame to which the collision load is transmitted from the load transmitting member is bent inward in the vehicle width direction, and the front side frame is brought into contact with the power unit. Although a part of the collision load in the vehicle is distributed to the anti-collision side in the vehicle width direction, the load transmitting member is in contact with the side wall on the outer side in the vehicle width direction of the front side frame from the front side of the vehicle Therefore, the remaining part of the collision load presses the front side frame toward the rear side of the vehicle. For this reason, the possibility that the collision load at the time of the small overlap collision of the vehicle is transmitted to the vehicle interior of the vehicle via the front side frame is increased.

  The present invention has been made in view of such a point, and an object thereof is to suppress as much as possible the transmission of a collision load at the time of a small overlap collision of a vehicle into the vehicle interior of the vehicle. There is to do.

In order to achieve the above object, according to the present invention, a pair of left and right front side frames extending in the vehicle front-rear direction at the front portion of the vehicle, the front side frames, and the vehicle width direction outer sides than the front side frames. With respect to the front vehicle body structure of the vehicle, the protrusions provided on the front side frames are provided to protrude from either one of the front side frames. When the vehicle has a frontal collision outside in the width direction, a collision load is input to a protrusion provided on the one front side frame, and each of the protrusions has the collision load. , A rear surface portion located on the rear side of the vehicle with respect to the front surface portion, a side surface portion connecting the front surface portion and the outer end portions of the rear surface portion in the vehicle width direction, Oppositely facing each other in the vertical direction, and having an upper surface portion and a lower surface portion joined to the front surface portion, the rear surface portion, and the side surface portion, an end portion on the inner side in the vehicle width direction of the rear surface portion of each protrusion is Each front side frame is fixed to the side wall portion on the outer side in the vehicle width direction, the upper surface portion of each projection is fixed integrally to the upper wall portion of each front side frame, and the lower surface of each projection is The vehicle on the rear surface portion is fixed to the lower wall portion of each front side frame integrally, and at least one of the upper surface portion and the lower surface portion of each projection portion from the vicinity of the corner on the vehicle front side and the vehicle width direction outer side. It was set as the structure that the bead extended to the edge part vicinity of the width direction inner side was formed .

  With the above configuration, when the vehicle has a small overlap collision with an obstacle on the front surface thereof, the collision load is input to the front surface portion of the protruding portion. Thus, the upper and lower surfaces of the upper side wall and the lower wall of the front side frame from the collision load input position on the front surface through the upper and lower surfaces of the protrusion. Each part is transmitted to a fixed part. Thus, the collision load is transmitted to the inner side wall portion of the front side frame through the upper and lower surfaces of the protrusion and the upper and lower walls of the front side frame. As a result, the portion provided with the protruding portions (particularly the upper surface portion and the lower surface portion) in the longitudinal direction of the front side frame to which the collision load is transmitted is pushed inward in the vehicle width direction and displaced inward in the vehicle width direction. The portion pushed inward in the vehicle width direction is difficult to bend in the vehicle width direction due to integral fixation with the upper surface portion and the lower surface portion of the protruding portion, so the portion on the front side frame where the protruding portion is provided On the other hand, the vicinity of the rear side of the vehicle is bent so as to protrude inward in the vehicle width direction. The bent portion, which is the bent portion, is in contact with a rigid part connected to the vehicle body member such as an engine unit disposed between the front side frames. be able to. As a result, a lateral force that moves the front portion of the vehicle to the side away from the obstacle in the vehicle width direction acts on the front portion of the vehicle via the bent portion and the rigid part. In this manner, the collision load input from the front side of the vehicle to the protruding portion can be converted into a load in the vehicle width direction. As a result, the direction of the vehicle can be changed so that the front portion of the vehicle moves to the side away from the obstacle in the vehicle width direction. Therefore, it is possible to suppress the collision load at the time of the small overlap collision of the vehicle from being transmitted to the vehicle interior of the vehicle.

Here, the collision load at the time of a small overlap collision of the vehicle is normally input to the front part of the protruding part via the bumper reinforcement, and the outer part in the vehicle width direction of this bumper reinforcement is the small part. At the time of an overlap collision, the front part is in contact with the end of the front part in the vehicle width direction and easily presses the front part toward the rear side of the vehicle and in the vehicle width direction. Thus, the collision load is basically transmitted from the vicinity of the corner on the vehicle front side and the vehicle width direction outer side to the vicinity of the rear surface portion on the inner side in the vehicle width direction on the upper surface portion and the lower surface portion of the protrusion. The Therefore, a bead is formed in the transmission path of the collision load, so that the strength of the upper surface portion or the lower surface portion with respect to the collision load can be maintained. In addition, since the collision load is easily transmitted along the bead, the collision load is easily transmitted to a portion of the front side frame corresponding to the portion closer to the rear side of the protruding portion. As a result, the vicinity of the rear side of the vehicle with respect to the portion of the front side frame provided with the protruding portion is more easily bent so as to protrude inward in the vehicle width direction.

  In the front vehicle body structure of the vehicle, a front surface portion of each protrusion is fixed to a flange portion provided at a front end of each front side frame, and extends outward from the flange portion in the vehicle width direction. It is preferable.

  Thus, since the collision load at the time of the small overlap collision of the vehicle is input to the protruding portion at an early stage, the collision load can be converted into the load in the vehicle width direction at an early stage. Therefore, it is possible to enhance the effect of suppressing the transmission of the collision load to the passenger compartment during the small overlap collision of the vehicle.

  In the front vehicle body structure of the vehicle, each front side frame is formed in a closed cross-sectional shape, and an end on the inner side in the vehicle width direction of the rear surface portion of each protruding portion is an end on the inner side in the vehicle width direction of the rear surface portion. Fixed to the outer side wall portion of each front side frame through a fixing portion that extends from the portion to the rear side of the vehicle and is fixed to the outer side wall portion of each front side frame. A node member for partitioning the interior space of each front side frame in the vehicle front-rear direction is provided inside each front side frame so as to overlap the fixed portion of each protrusion in the vehicle front-rear direction. It is preferable.

  That is, the collision load at the time of the small overlap collision of the vehicle is transmitted to the upper wall portion and the lower wall portion of the front side frame via the upper surface portion and the lower surface portion of the protrusion portion, and the upper surface of the protrusion portion. It is also transmitted to the portion where the fixed portion of the projecting portion of the side wall portion on the outer side in the vehicle width direction of the front side frame is fixed via the portion and the lower surface portion. The collision load transmitted to this portion is transmitted to the inner side wall portion of the front side frame via the node member. Accordingly, the vicinity of the vehicle rear side with respect to the node member in the front side frame (that is, the vicinity of the vehicle rear side with respect to the portion provided with the protruding portion) is projected inward in the vehicle width direction. , It becomes easier to bend. As a result, the position where the bent portion in the longitudinal direction of the front side frame is generated becomes stable, and the bent portion can be stably collided with the rigid part at the time of the small overlap collision. Therefore, the transmission of the collision load to the passenger compartment at the time of the small overlap collision of the vehicle can be further effectively suppressed.

As described above, according to the front body structure of the vehicle of the present invention, the upper surface portion of each protrusion provided on each front side frame is integrally fixed to the upper wall portion of each front side frame. The lower surface of each projection is integrally fixed to the lower wall of each front side frame, and at least one of the upper surface and the lower surface of each projection is on the vehicle front side and the vehicle width direction outside. By forming a bead extending from the vicinity of the corner to the vicinity of the inner end in the vehicle width direction of the rear surface of the protruding portion, the collision load at the time of a small overlap collision of the vehicle is transmitted to the vehicle interior of the vehicle. Can be suppressed as much as possible.

It is the perspective view seen from the vehicle left front side and the upper side which shows the front part of the vehicle to which the front vehicle body structure which concerns on embodiment of this invention was applied. It is the perspective view which looked at the circumference of the flange part in the front side frame of the vehicle left side from the vehicle left front side and the upper part. It is the perspective view which looked at the reinforcement part of the vehicle left side from the vehicle left rear side and the upper side. It is the left view which looked at the 1st brace of the vehicle left side from the vehicle left side. It is the VV sectional view taken on the line of FIG. It is a perspective view which shows a 2nd node member. It is the perspective view which looked at the 1st and 2nd braces on the left side of the vehicle from the right rear side and the upper side of the vehicle. It is the perspective view which looked at the periphery of the flange part in the front side frame of the vehicle left side from the vehicle left front side and the lower side. It is a top view which shows the state which the part extended outside the vehicle width direction rather than the front side frame of the vehicle left side in a bumper reinforcement and the reinforcement part contact | abutted at the time of the small overlap collision of a vehicle. FIG. 10 is a plan view showing a state in which the inner part in the vehicle width direction of the bent portion of the front side frame on the left side of the vehicle is in contact with the engine unit after the state shown in FIG. 9 during a small overlap collision of the vehicle.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a front part of a vehicle 1 to which a vehicle body front part structure according to an embodiment of the present invention is applied. In the following description, the front, rear, left, right, upper and lower of the vehicle 1 are simply referred to as front, rear, left, right, upper and lower, respectively.

  An engine room 2 for disposing an engine unit E (see FIGS. 9 and 10) for driving front wheels (not shown) of the vehicle 1 and a transmission (not shown) is provided at the front portion of the vehicle 1. . The engine unit E is vertically installed in the engine room 2, and the transmission is disposed on the rear side of the engine unit E. The engine unit E is connected to a pair of left and right front side frames 5 via engine mounts provided on the left and right sides of the engine unit E.

  The pair of left and right front side frames 5 are disposed so as to extend in the front-rear direction at both ends of the engine room 2 in the vehicle width direction. The pair of left and right front side frames 5 are each formed in a substantially rectangular closed cross-sectional shape, and include an upper wall portion 5c (see FIGS. 3 and 7), a lower wall portion 5d (see FIG. 7), and an upper wall portion. An inner side wall portion 5a (see FIGS. 5 and 7) that connects the inner edge in the vehicle width direction of 5c and the inner edge in the vehicle width direction of the lower wall portion 5d, and an outer edge in the vehicle width direction of the upper wall portion 5c, It has the outer side wall part 5b (refer FIGS. 3-5 and FIG. 8) which connects the edge of the vehicle width direction outer side of the lower wall part 5d. In the following description, the inner side wall portion 5a of the front side frame 5 is called a frame inner wall portion 5a, the outer side wall portion 5b of the front side frame 5 is called a frame outer wall portion 5b, and the upper wall portion 5c of the front side frame 5 is a frame. It is referred to as an upper wall portion 5c, and the lower wall portion 5d of the front side frame 5 is referred to as a frame lower wall portion 5d.

  The rear part of the left and right front side frames 5 is a kick part 5e whose height gradually decreases toward the rear side. The engine room 2 and the vehicle are located at substantially the same front and rear position as the kick part 5e. A dash panel 9 that partitions the room is provided.

  The dash panel 9 extends in the vertical direction and the vehicle width direction, and an upper end portion of the dash panel 9 is coupled to the cowl member 10. Further, front hinge pillars 11 for rotatably supporting left and right front doors (not shown) of the vehicle 1 are fixed to both ends of the dash panel 9 in the vehicle width direction. The lower ends of the front pillars 12 that extend upward toward the rear side are fixed to the upper ends of the left and right front hinge pillars 11, respectively.

  Suspension towers 13 are provided outside the left and right front side frames 5 in the vehicle width direction. The suspension tower 13 cooperates with a wheel house panel (not shown) to form a wheel house in which the front wheels of the vehicle 1 are arranged on the outer sides in the vehicle width direction of the left and right front side frames 5. The lower end portions of the left and right suspension towers 13 are fixed to the left and right front side frames 5, respectively, and the upper end portions of the left and right suspension towers 13 are disposed on the upper side of the left and right front side frames 5. It is fixed to each.

  Although not shown, suspension cross members that support the left and right front wheels and connect the left and right front side frames 5 are disposed at substantially the same front and rear positions as the suspension tower 13. The left and right end portions of the suspension cross member are provided with front extending portions respectively extending toward the front side at positions below the left and right front side frames 5, and the left and right front extending portions are provided. The front end of each part is coupled to the front end of the left and right front side frames 5 via a connecting member extending vertically. The left and right engine mounts are respectively connected to the left and right front side frames 5 on the upper side and are connected to the left and right front extending portions on the lower side.

  Crash cans 6 are disposed at front ends of the left and right front side frames 5, respectively. Specifically, flange portions 7 are provided integrally with the corresponding front side frames 5 at the front end of the left and right front side frames 5, and a flange portion 6 a is formed at the rear end of the crash can 6. Yes. The flange portions 7 and 6a are fixed to each other by four fastening members 8 (bolts and nuts) in a state where the flange portions 7 and 6a are aligned with each other.

  A bumper reinforcement 18 extending in the vehicle width direction is provided at the front end of the vehicle 1. The front end surfaces of the left and right crash cans 6 are respectively fixed to the rear surfaces of the bumper reinforcement 18. The left and right crash cans 6 are configured to absorb the collision load by being crushed in the front-rear direction when the bumper reinforcement 18 receives a collision load at the time of a vehicle front collision.

  The bumper reinforcement 18 has an arcuate shape as viewed from above so that the ends on both sides in the vehicle width direction are located on the rear side of the center in the vehicle width direction. The ends of the bumper reinforcement 18 of the present embodiment on both sides in the vehicle width direction are located on the outer side in the vehicle width direction with respect to the left and right front side frames 5. As will be described in detail later, the length of the bumper reinforcement 18 in the vehicle width direction is a so-called small overlap collision in which a portion of the front surface of the vehicle 1 outside the front side frame 5 collides with an obstacle. When the SOL collision occurs (hereinafter referred to as SOL collision), a portion (hereinafter referred to as a bumper outer portion 18a) that extends outward in the vehicle width direction from the front side frame 5 in the bumper reinforcement 18 on the side where the SOL collision occurs. ) Is set to such a length as to abut against a reinforcing portion 40 of the first brace 30 described later.

  The left and right apron members 16 are bent inward in the vehicle width direction from the front end of the apron extending portion 16a to the front side, extending in the front-rear direction substantially parallel to the left and right front side frames 5. Each has an apron bending portion 16b. The rear end portions of the left and right apron extending portions 16a are joined to the front portions of the left and right front hinge pillars 11, respectively.

  The front end portions (facing inward in the vehicle width direction) of the left and right apron curved portions 16b are respectively connected to the end portions on both sides in the vehicle width direction of the shroud door member 19 extending in the vehicle width direction via two fastening members 20 respectively. Fastened and fixed. That is, the front end portions of the left and right apron members 16 (the front end portions of the apron bending portion 16b) are connected by the shroud upper member 19 that forms the upper portion of a rectangular frame-shaped shroud that supports a radiator (not shown). Yes.

  In the present embodiment, on the rear side of the flange portion 7 of the left and right front side frames 5, a first brace 30 that connects the frame outer wall portion 5b and the apron member 16 to each other on the left side and on the right side, A second brace 60 for connecting the front side frame 5 and the shroud upper member 19 is provided.

  Hereinafter, the configuration of the rear side portion of the flange portion 7 in the front side frame 5 will be described in detail with reference to FIGS. Since the vehicle body front structure according to the present embodiment is configured to be bilaterally symmetric (symmetric with respect to a plane passing through the center of the vehicle 1 in the vehicle width direction), in the following description of the above configuration, the left front side frame Will be described only, and detailed description of the right front side frame 5 will be omitted. Moreover, in the following description of the above configuration, the members (front side frame 5 and the like) provided on both the left and right indicate those provided on the left side.

  The first brace 30 is connected to the front side frame 5 and protrudes to the left side (the vehicle width direction outer side) of the frame outer wall 5b in the substantially same height range as the front side frame 5; The reinforcing portion 40 includes an extending portion 50 that connects an upper end edge portion of the portion protruding to the left side of the frame outer wall portion 5 b with the left apron member 16. In the present embodiment, the reinforcing portion 40 is provided on the front side frame 5 so as to protrude outward in the vehicle width direction from the front side frame 5 (that is, outward in the vehicle width direction from the frame outer wall portion 5b). It corresponds to.

  As shown in FIG. 3, the reinforcing portion 40 extends horizontally so as to protrude to the left side of the frame outer wall portion 5 b and is opposed to the upper and lower surfaces 43 and 44, and the peripheral portion of the upper surface portion 43. A connecting portion for connecting a portion protruding to the left side from the frame outer wall portion 5c and a portion protruding to the left side from the frame outer wall portion 5c at the peripheral edge portion of the lower surface portion 44 is provided. The upper surface portion 43 and the lower surface portion 44 are each composed of a plate member.

  Outer portions 43a and 44a, which are portions of the upper surface portion 43 and the lower surface portion 44 that protrude outward in the vehicle width direction from the frame outer wall portion 5b, both have a substantially rectangular shape in plan view. The edge portion is inclined rearward toward the right side (in the vehicle width direction) in plan view. As shown in FIGS. 3 and 5, the outer portions 43a and 44a are provided on the inner side in the vehicle width direction of the rear surface portion 46 from the left and front corners of the outer portions 43a and 44a toward the right and rear sides. Beads 43b and 44b extending along the diagonal lines of the outer portions 43a and 44a are formed in the vicinity of the end portions (only the beads 44b are shown in FIG. 5). The bead 43b of the outer portion 43a protrudes downward, and the bead 44b of the outer portion 44a protrudes upward. The protruding direction of the beads 43a and 44a may be either upward or downward. Moreover, the bead 43b may be formed only in the outer side part 43a among both the outer side parts 43a and 44a, and the bead 44b may be formed only in the outer side part 44a.

  A base end portion 43c located on the right side of the outer side portion 43a in the upper surface portion 43 is integrally joined and fixed to the frame upper wall portion 5c by welding in a state of being superimposed on the upper side of the frame upper wall portion 5c. In addition, a base end portion 44c located on the right side of the outer side portion 44a in the lower surface portion 44 is integrally joined and fixed to the frame lower wall portion 5d by welding in a state of being superimposed on the lower side of the frame lower wall portion 5d. . It should be noted that a part of the frame upper wall part 5c where the base end part 43c overlaps may be cut out, and similarly, a part of the frame lower wall part 5d where the base end part 44c overlaps. May be cut out.

  In addition, both the front and rear side edges of the outer peripheral portion 43a of the upper surface portion 43 and the outer portion 44a of the lower surface portion 44 are located on the outer periphery of the frame outer wall portion 5b at the periphery of the upper surface portion 43 and the lower surface portion 44. On the left side edge, welding allowances 43d and 44d for welding the upper surface portion 43 and the lower surface portion 44 to the connecting portions (a front surface portion 45, a rear surface portion 46, and a side surface portion 47 described later) are formed, respectively.

  As shown in FIGS. 2 to 4, the connecting portion includes a front surface portion 45 extending in the up-down direction and the vehicle width direction, a rear surface portion 46 positioned rearward with respect to the front surface portion 45, a front surface portion 45, and It is comprised by the side part 47 which connects the edge parts of the vehicle width direction outer side (left side) of the rear surface part 46. The rear surface portion 46 extends in the vertical direction and extends in a direction inclined with respect to the vehicle width direction so as to be located on the rear side toward the inner side in the vehicle width direction. The rear surface portion 46 and the side surface portion 47 are configured by one plate member, and the front surface portion 45 is configured by a plate member different from the plate member. In addition, all of the front part 45, the rear surface part 46, and the side part 47 may be comprised with one board member.

  The front side edge part of the outer side part 43a of the upper surface part 43 and the front side edge part of the outer side part 44a of the lower surface part 44 are welded and joined to the upper and lower ends of the front face part 45, respectively. The front edge parts of 44a will be connected. The rear side edge portion of the outer side portion 43a of the upper surface portion 43 and the rear side edge portion of the outer side portion 44a of the lower surface portion 44 are welded to the upper and lower end portions of the rear surface portion 46, respectively. The rear side edges 43a and 44a are connected to each other. The left side edge portion of the outer side portion 43a of the upper surface portion 43 and the left side edge portion of the outer side portion 44a of the lower surface portion 44 are welded to the upper and lower end portions of the side surface portion 47, respectively. The left side edges of 44a are connected to each other.

  The right end portion of the front portion 45 is joined and fixed to the left end portion of the flange portion 7 by welding. A front side coupling flange 47a extending leftward is formed at the front side end of the side surface part 47, and the front side coupling flange 47a is joined to the left side end part of the front surface part 45 by welding. Further, a rear coupling flange 46a extending from the end to the rear side along the frame outer wall portion 5b is formed at the right side (vehicle width direction inner side) end of the rear surface portion 46. The side coupling flange 46a is fastened and fixed to the outer wall portion 5b of the frame by fastening members 73 (see FIGS. 3 to 5 (only one fastening member 73 is visible in FIG. 5)). The rear coupling flange 46a corresponds to a fixed portion that extends in the front-rear direction along the frame outer wall portion 5b and is fixed to the frame side wall portion 5b. In addition, it is also possible to fix the right end part of the front part 45 to the frame outer wall part 5b instead of fixing to the left end part of the flange part 7. In this case, it is preferable that the right end portion of the front surface portion 45 is in the vicinity of the front end in the frame outer wall portion 5b.

  Further, the upper end portions of the front surface portion 45, the rear surface portion 46, and the side surface portion 47 respectively extend to the upper side of the upper surface portion 43, and the upper end portion of the front surface portion 45 is connected to the welding allowance 43d on the front side of the upper surface portion 43 and the rear surface portion. The upper end portion of 46 is joined to the welding allowance 43d on the rear side of the upper surface portion 43 and the upper end portion of the side surface portion 47 is joined to the welding allowance 43d on the left side of the upper surface portion 43 by welding. On the other hand, the lower end portions of the front surface portion 45, the rear surface portion 46, and the side surface portion 47 respectively extend below the lower surface portion 44, and the lower end portion of the front surface portion 45 has a welding allowance 44d on the front side of the lower surface portion 44, The lower end portion of the rear surface portion 46 is joined to the welding allowance 44d on the rear side of the lower surface portion 44 and the lower end portion of the side surface portion 47 is joined to the welding allowance 44d on the left side of the lower surface portion 43 by welding.

  As shown in FIG. 5, the first joint member 71 and the second joint that partition the interior space of the front side frame 5 in the front-rear direction are provided in a range in which the reinforcing portion 40 in the front-rear direction inside the front side frame 5 is provided. A member 72 is provided (see also FIG. 6 for the second node member 72). In the present embodiment, the first node member 71 and the second node member 72 are both plate members, but are not limited thereto.

  The first node member 71 includes a node body 71a extending in the vehicle width direction and the vertical direction, and two coupling portions 71b extending forward from both ends of the node body 71a in the vehicle width direction. The node body 71 a has substantially the same shape as the internal space of the front side frame 5 when viewed from the longitudinal direction (front-rear direction) of the front side frame 5. The coupling portion 71b located on the right side is joined to the frame inner wall portion 5a by welding, and the coupling portion 71b located on the left side is joined to the frame outer wall portion 5b by welding. The node main body 71a is positioned in the vicinity of the connecting member that connects the front side frame 5 and the front extending portion in a state where the left and right connecting portions 71b are joined to the front side frame 5, respectively. The first node member 71 is rigid to the front side frame 5 against a vertical repulsive load from the road surface that is input to the front side frame 5 through the suspension cross member and the connecting member when the vehicle 1 is traveling. It is provided to improve. The first node member 71 may not be provided.

  The second node member 72 includes a node main body portion 72a extending in the vehicle width direction and the vertical direction, an inner coupling portion 72b extending from the right end of the node main body portion 72a to the front side, and from the left end of the node main body portion 72a to the rear side. It has the outer coupling | bond part 72c extended, and the two extending parts 72d (refer FIG. 6) each extended to the back side from the upper end and lower end of the node main body part 72a. The node body 72 a has substantially the same shape as the internal space of the front side frame 5 when viewed from the longitudinal direction of the front side frame 5. The inner coupling portion 72b is joined to the frame inner wall portion 5a by welding, while the outer coupling portion 72c is fastened and fixed to the rear coupling flange 46a by the two fastening members 73 with the frame outer wall portion 5b interposed therebetween. . That is, the outer coupling part 72c is fastened together with the rear coupling flange 46a together with the frame outer wall part 5b, and is fastened and fixed to the frame outer wall part 5b. As shown in FIG. 5, each fastening member 73 is composed of a bolt 73a and a nut 73b to which the bolt 73a is screwed. As shown in FIG. Two bolt insertion holes 72g are formed. The nut 73b is fixed around each bolt insertion hole 72g on the inner surface in the vehicle width direction of the outer coupling portion 72c by welding or the like before placing the second node member 72 inside the front side frame 5. . The rear coupling flange 46a and the outer coupling portion 72c may be separately fixed to the frame outer wall portion 5b, for example, by welding.

  The upper and lower extending portions 72d are only substantially in contact with the frame upper wall portion 5c and the frame lower wall portion 5d, respectively, and are not joined to the frame upper wall portion 5c and the frame lower wall portion 5d. The upper and lower extending portions 72d may be joined to the frame upper wall portion 5c and the frame lower wall portion 5d, respectively.

  Further, the inner coupling portion 72b may be in a state of being substantially in contact with the frame inner wall portion 5a without being joined to the frame inner wall portion 5a. There is no problem even if the second node member 72 is fixed to the front side frame 5 only by the outer coupling portion 72c. In short, it is only necessary that the second node member 72 (node body 72a) can be stretched between the frame inner wall 5a and the frame outer wall 5b with respect to a load input in the vehicle width direction. However, the thickness of the second node member 72 (node body 72a) is such that the front side to which the collision load is input when the front side frame 5 has a frontal collision in which a collision load is input from the front side. The thickness is set so as not to prevent the frame 5 from being crushed in the front-rear direction. The thickness of the first node member 71 is the same as that of the second node member 72.

  Furthermore, the inner coupling part 72b may extend rearward from the right end of the node main body part 72a, like the outer coupling part 72c. Alternatively, the inner coupling portion 72b extends from the right end of the node body portion 72a to the rear side and the outer coupling portion 72c extends from the left end of the node body portion 72a to the front side, or the inner coupling portion 72b and the outer coupling portion 72c. Both may extend from the right end and the left end of the node main body 72a to the rear side.

  The second node member 72 is provided so as to overlap the rear side coupling flange 46a in the front-rear direction in a state where the inner side coupling part 72b and the outer side coupling part 72c are joined to the front side frame 5. In particular, it is preferable that the node main body 72 a of the second node member 72 is located at the front and rear positions overlapping the rear side coupling flange 46 a when viewed from the side of the vehicle 1. In the present embodiment, the node main body 72a is located at the same position as the front end of the rear coupling flange 46a (that is, the inner end of the rear surface 46 in the vehicle width direction) in the front-rear direction. Further, as described above, the outer coupling portion 72c extends from the right end of the node main body portion 72a to the rear side, and is located at a front and rear position overlapping the rear coupling flange 46a when viewed from the side of the vehicle 1. ing.

  At the time of the SOL collision, the second side member 72 is arranged such that the front side frame 5 is rearward of the portion of the front side frame 5 where the reinforcing portion 40 is provided (the portion where the second node member 72 is provided). In order to make it easier to bend in the vicinity of the side, it is disposed at the position as described above. The second node member 72 is not always necessary.

  A through hole 71c that penetrates the node body 71a in the front-rear direction is formed in the node body 71a of the first node member 71, and the node body 72a of the second node member 72 has the through-hole 71c. A through-hole 72e that penetrates 72a in the front-rear direction is formed. The through hole 71c and the through hole 72e are formed in a long hole shape that is long in the vertical direction. In the through hole 71c and the through hole 72e, the electrodeposition liquid flows in the front-rear direction (longitudinal direction of the front side frame 5) inside each front side frame 5 in the electrodeposition coating process of the vehicle body member including both front side frames 5. It is for doing so.

  The entire periphery of the peripheral edge portion of the through hole 71c of the node main body portion 71a is a bent portion 71d that is bent forward by burring. Even if the through hole 71d is formed in the node main body 71a, the bent portion 71e can suppress the strength reduction of the node main body 71a against the vertical repulsive load from the road surface. It should be noted that the entire peripheral edge of the through hole 71d of the node main body 71a may be bent rearward.

  Similarly, the entire periphery of the peripheral edge portion of the through hole 72e of the node main body portion 72a is a bent portion 72f bent to the rear side by burring. Even if the through hole 72e is formed in the node main body portion 72a, the bent portion 72f can suppress the strength reduction of the node main body portion 72a with respect to the load input in the vehicle width direction. It should be noted that the entire peripheral edge of the through hole 72e of the node main body 72a may be bent forward.

  As shown in FIGS. 2, 4, 7, and 8, the extending portion 50 of the first brace 30 is located on the outer side in the vehicle width direction from the frame outer wall portion 5 b at the peripheral edge of the upper end portion of the reinforcing portion 40. The portion located, specifically, the upper end edge of the connecting portion extends toward the left apron member 16. Specifically, it extends from the upper end edge portion of the connecting portion toward the apron member 16 while inclining outward and rearward in the vehicle width direction.

  As shown in FIG. 7, the extending portion 50 has an open cross-sectional shape with an opening on the right side (in the vehicle width direction), and as shown in FIG. 4, a front wall portion 51 positioned on the front side, Side wall part 52 located on the left side, rear wall part 53 located on the rear side, right edge part and upper edge part of front wall part 51, and right edge part and upper edge of rear wall part 53 It is comprised by the flange part 54 (refer FIG. 8 especially) provided along the part.

  The lower end portion of the extending portion 50 is joined to the upper end edge portion of the connecting portion by welding. Specifically, the lower end portion of the front wall portion 51 is the upper edge portion of the front portion 45 of the connecting portion, the lower end portion of the rear wall portion 53 is the upper end edge portion of the rear surface portion 46 of the connecting portion, and the lower end portion of the side wall portion 52. The portion is joined to the upper edge of the side portion 47 of the connecting portion by welding.

  As shown in FIG. 8, the flange portion 54 is formed so that the upper end portion is along the lower surface of the apron member 16. The upper end portion of the flange portion 54 is joined to the apron bending portion 16b by welding, and thereby the extending portion 50 is joined to the apron member 16.

  The extending portion 50 is configured so as not to hinder the movement of the reinforcing portion 40 when the reinforcing portion 40 moves due to the collision load at the time of the SOL collision for the reason described later.

  Next, the second brace 60 will be described. As shown in FIG. 7, the second brace 60 extends toward the shroud door member 19 from the front-rear direction portion of the frame inner wall portion 5 a that overlaps the reinforcing portion 40 when viewed from the side of the vehicle 1. .

  As shown in FIGS. 2, 3 and 8, the second brace 60 has an open cross-sectional shape in which the left side (the vehicle width direction outer side) is open, the front wall portion 61 located on the front side, and the right side Side wall portion 62, rear wall portion 63 located on the rear side, flange portion 64 provided along the left edge portion of front wall portion 61 and the left edge portion of rear wall portion 63 (particularly, FIG. 3).

  As shown in FIG. 3, the front wall portion 61 extends substantially vertically upward from the front side frame 5, and then is bent toward the front side. From the curved portion 61 a, the front wall portion 61 is inclined toward the front side toward the upper side. It extends. On the other hand, the rear wall 63 extends substantially vertically upward toward the shroud upper member 19. Thereby, about the part below the height position of the said curved part 61a in the side wall part 62, while the length of the front-back direction is substantially the same in the up-down direction, the said curved part 61a in the side wall part 62 is the same. As for the portion above the height position, the length in the front-rear direction increases as the shroud door member 19 approaches.

  Also, as shown in FIG. 3, the front wall portion 61 is formed such that the length in the vehicle width direction becomes longer as it approaches the shroud upper member 19, and as shown in FIG. Similarly to the portion 61, the length in the vehicle width direction is formed so as to become longer as it approaches the shroud upper member 19. Since the front wall portion 61 and the rear wall portion 63 are formed as described above, the portion of the second brace 60 that is lower than the height position of the curved portion 61a is the bent portion of the second brace 60. Compared to the portion above the height position of the portion 61a, the shape is closer to a flat plate. As a result, the portion of the second brace 60 closer to the front side frame 5 has a lower strength against the load in the vehicle width direction.

  The second brace 60 and the front side frame 5 are joined by welding. Specifically, as shown in FIG. 7, a lower joint portion 66 that protrudes downward is provided at the lower end portion of the side wall portion 62, and the lower joint portion 66 serves as an inner wall portion of the frame. It is joined to 5a by welding. The lower end portions of the front and rear flange portions 64 are also joined to the frame inner wall portion 5a by welding.

  On the other hand, the second brace 60 and the shroud upper member 19 are joined by a fastening member 67 (bolts and nuts). Specifically, as shown in FIG. 8, the upper end portion of the second brace 60 is formed with an upper joint portion 65 bent substantially vertically toward the left side along the shroud upper member 19. The upper joint portion 65 is joined to the end portion (here, the left end portion) of the shroud door member 19 on one side in the vehicle width direction by two fastening members 67.

  In the present embodiment, the rear portion of the flange portion 7 in the left front side frame 5 is configured as described above. The rear portion of the flange portion 7 in the right front side frame 5 is configured to be bilaterally symmetrical with the structure of the rear portion of the flange portion 7 in the left front side frame 5 described above. .

  Here, when the vehicle 1 causes the SOL collision with the obstacle, the front portion of the vehicle 1 generates the lateral force at the front portion of the vehicle 1, and the front portion of the vehicle 1 is driven by the lateral force. The vehicle 1 is rotated in the vehicle width direction so as to move away from the obstacle in the width direction, and the collision load at the time of the SOL collision can be received in the vehicle width direction. desirable.

  In the present embodiment, the lateral force is efficiently generated with respect to the front portion of the vehicle 1 by the reinforcing portion 40 of the first brace 30. This will be described in detail below.

  9 and 10 show a state around the flange portion 7 of the front side frame 5 when the vehicle 1 has caused the SOL collision with the obstacle A. FIG. 9 and 10 show a case where the left side portion of the front surface of the vehicle 1 has caused the SOL collision with the obstacle A. FIG.

  When the vehicle 1 causes the SOL collision on the left side with the obstacle A, the left bumper outer portion 18a of the bumper reinforcement 18 and the obstacle A come into contact with each other, and a collision load is input to the left bumper outer portion 18a. Is done. When a collision load is input to the left bumper outer portion 18a, the bumper reinforcement 18 uses the front end surface of the crash can 6 on the side where the SOL collision does not occur (here, the right side) as a fulcrum. The outer portion 18a is deformed so as to move toward the right side (the vehicle width direction inner side, that is, the side opposite to the obstacle A in the vehicle width direction) and the rear side. At this time, as shown in FIG. 9, the left crash can 6 is crushed in the front-rear direction as the bumper reinforcement 18 is deformed.

  Since the left front side frame 5 is coupled with a reinforcing portion 40 that protrudes to the left side (vehicle width direction outer side) from the frame outer wall portion 5b, the left bumper outer portion moved as described above due to the SOL collision. 18a contacts the left reinforcing part 40. Thereby, the collision load is input to the left reinforcing portion 40. Thus, at the time of the SOL collision on the left side of the front surface of the vehicle 1, a collision load is input to the left reinforcing portion 40 (Note that at the time of the SOL collision on the right side of the front surface of the vehicle 1, The collision load is input to the portion 40). When the collision load is input to the reinforcing portion 40, the left bumper outer portion 18 a abuts on the left end portion of the front surface portion 45 in the left reinforcing portion 40 (connection portion with the side surface portion 47 in the front surface portion 45). Therefore, a collision load is applied to the left end portion of the front surface portion 45 in the left reinforcing portion 40 along the diagonal lines of the outer portions 43a and 44a of the upper surface portion 43 and the lower surface portion 44 from the left front side to the right rear side. Entered.

  The collision load input to the front surface portion 45 of the left reinforcement portion 40 from the input portion of the collision load on the front surface portion 45 via the upper surface portion 43 and the lower surface portion 44 of the reinforcement portion 40, In the frame upper wall portion 5c and the frame lower wall portion 5d of the frame 5, the upper surface portion 43 and the lower surface portion 44 are transmitted to the fixed portions. Thus, the collision load is applied to the inner wall portion of the left front side frame 5 via the upper surface portion 43 and the lower surface portion 44 of the reinforcing portion 40 and the frame upper wall portion 5c and the frame lower wall portion 5d of the left front side frame 5. Up to 5a. As a result, the portion of the left front side frame 5 where the reinforcing portion 40 is provided (particularly the portion where the upper surface portion 43 and the lower surface portion 44 are integrally coupled and fixed) is pushed inward in the vehicle width direction, and the vehicle Displaces inward in the width direction. The portion where the upper surface portion 43 and the lower surface portion 44 of the left front side frame 5 are integrally coupled and fixed is not easily bent in the vehicle width direction, and therefore the portion provided with the reinforcing portion 40 of the left front side frame 5 9 is pushed inward in the vehicle width direction, as shown in FIG. 9, the portion provided with the left reinforcing portion 40 in the left front side frame 5 is not bent and the left front side frame 5 is reinforced. It is bent so that the vicinity of the rear side is convex on the right side with respect to the portion where the portion 40 is provided. Thereafter, the bent portion 5f, which is the bent portion, is pushed toward the right side and the rear side by the collision load.

  Here, the collision load is transmitted to the frame upper wall portion 5c and the frame lower wall portion 5d of the left front side frame 5 through the upper surface portion 43 and the lower surface portion 44, in addition to the upper surface portion 43 and Via the lower surface portion 44 (particularly along the beads 43b and 44b), it is also transmitted to the portion where the rear coupling flange 46a of the frame outer wall portion 5b of the left front side frame 5 is fixed. In the present embodiment, the node body 72a of the second node member 72 is in the same position as the front end of the rear coupling flange 46a (that is, the inner end of the rear surface 46 in the vehicle width direction) in the front-rear direction. So that the collision load transmitted to the portion where the rear coupling flange 46a is fixed to the outer wall portion 5b of the frame is passed through the second node member 72. Then, it is transmitted to the frame inner wall portion 5a of the left front side frame 5. As a result, the vicinity of the rear side of the second node member 72 in the left front side frame 5 (that is, the vicinity of the rear side with respect to the portion provided with the reinforcing portion 40) It is easy to become.

  Since the engine unit E is disposed on the right side of the left front side frame 5 as described above, the inner portion in the vehicle width direction of the bent portion 5f contacts the engine unit E (see FIG. 10). . Then, after the inner portion in the vehicle width direction of the bent portion 5f comes into contact with the engine unit E, the bent portion 5f pushes the engine unit E toward the right side and the rear side. Thereby, a lateral force directed to the right side is input to the engine unit E through the bent portion 5f. When the lateral force toward the right side is input to the engine unit E, the lateral force toward the right side is transmitted from the engine unit E to the left and right front side frames 5 through the engine mount, so that the front of the vehicle 1 A lateral force toward the right side is generated in the part.

  It is preferable that the inner part in the vehicle width direction of the bent part 5f contacts the engine body (cylinder block or the like) in the engine unit E or a rigid part provided in the engine body. Further, the inner part in the vehicle width direction of the bent part 5f may be in contact with a rigid part connected to a vehicle body member such as the front side frame 5 other than the engine unit E.

  As described above, a lateral force toward the right side is generated at the front portion of the vehicle 1 at the time of the SOL collision on the left side of the front surface of the vehicle 1. On the other hand, when the SOL collision occurs on the right side of the front surface of the vehicle 1 with the obstacle A, the bumper reinforcement 18, the right reinforcing portion 40, and the right front side frame 5 are symmetrical with the above-described operation. Thus, a lateral force toward the left side is generated at the front portion of the vehicle 1. The rigid part may be any part that can generate the lateral force at the front portion of the vehicle 1 by the contact of the bent portion 5f.

  The length of the bumper reinforcement 18 in the vehicle width direction is such that the bumper outer side portion 18a reliably contacts the reinforcing portion 40 of the first brace 30 on the side where the SOL collision occurs at the time of the SOL collision. Length is set.

  Specifically, when viewed from above, the length of the bumper reinforcement 18 in the vehicle width direction is such that the rear end of the bumper reinforcement 18 on one side in the vehicle width direction and the bumper reinforcement 18 The length of the straight line connecting the front end surface of the crash can 6 near the other end in the vehicle width direction (the surface fixed to the rear surface of the bumper reinforcement 18) in the vehicle width direction is the vehicle of the bumper reinforcement 18 A straight line connecting the corner on the outer side and the front side of the upper surface portion 43 of the reinforcing portion 40 near the one end in the width direction and the center in the vehicle width direction of the front end surface of the crash can 6 near the other end. The length is set to be longer than the length of. The bumper reinforcement 18 has a symmetrical shape with respect to a plane passing through the center of the vehicle 1 in the vehicle width direction, and the length relationship between the two straight lines is the same for both the left and right sides.

  Further, in the present embodiment, the bumper reinforcement 18 has a shape curved in an arch shape when viewed from above so that the end portions on both sides in the vehicle width direction are located on the rear side of the center portion in the vehicle width direction. Therefore, at the time of the SOL collision, the bumper reinforcement 18 is easily bent and deformed inward in the vehicle width direction due to the collision load. Thereby, at the time of the SOL collision, the bumper outer portion 18a on the side where the SOL collision has occurred becomes easy to move inward in the vehicle width direction. For this reason, the bumper outer portion 18a is input to the end portion on the outer side in the vehicle width direction of the front portion 45 of the reinforcing portion 40 on the side where the SOL collision has occurred (the connection portion of the front portion 45 with the side portion 47). In the collision load, the ratio of the component toward the inside in the vehicle width direction can be increased as much as possible. Thereby, the said lateral force can be more efficiently generated with respect to the front part of the vehicle 1 at the time of the said SOL collision.

  Further, in the present embodiment, the base end portion 43c of the upper surface portion 43 of the reinforcing portion 40 is integrally joined and fixed to the frame upper wall portion 5c, and the base end portion 44c of the lower surface portion 44 of the reinforcing portion 40 is the frame lower wall portion. Since it is integrally bonded and fixed to 5d, the portion of the front side frame 5 to which the reinforcing portion 40 is fixed has higher strength against the load in the vehicle width direction than the other portions of the front side frame 5. Therefore, when a collision load is input along the diagonal lines of the outer portions 43a and 44a of the upper surface portion 43 and the lower surface portion 44 to the reinforcing portion 40 on the side where the SOL collision has occurred during the SOL collision, the SOL collision The front side frame 5 on the side where the erosion occurs is easily bent toward the inner side in the vehicle width direction at the rear portion of the reinforcing portion 40. As a result, even if the engine unit E is located closer to the rear side of the engine room 2, the vehicle width direction inner side portion of the bent portion 5 f of the front side frame 5 is brought into contact with the engine unit E at the time of the SOL collision. It becomes easy. As a result, the lateral force can be generated more efficiently with respect to the front portion of the vehicle 1 at the time of the SOL collision.

  Further, in the present embodiment, in the front side frame 5, the node main body 72 a of the second node member 72 is arranged in the front-rear direction so that the front end of the rear coupling flange 46 a (that is, the vehicle of the rear surface 46). Since the position where the bent portion 5f in the longitudinal direction of the front side frame 5 is generated is stable, the bent portion 5f is moved to the engine at the time of the SOL collision. The unit E can be made to collide stably.

  Furthermore, in the present embodiment, the outer portions 43a, 44a of the upper surface portion 43 and the lower surface portion 44 are arranged on the outer side in the vehicle width direction of the outer side portions 43a, 44a from the vicinity of the corners on the front side toward the inner side in the vehicle width direction and the rear side. Extending beads 43b and 44b are respectively formed. As described above, at the time of the SOL collision, a collision load is input to the reinforcing portion 40 along the diagonal lines of the outer portions 43a and 44a from the vehicle width direction outer side and the front side toward the vehicle width direction inner side and the rear side. Therefore, the formation of the beads 43b and 44b corresponds to the collision load from the reinforcing portion 40 along the beads 43b and 44b to a portion of the front side frame 5 that is particularly closer to the rear side of the reinforcing portion 40. It becomes easy to transmit to a part (and extension node main-body part 72a). Thereby, a lateral force can be more efficiently generated with respect to the front portion of the vehicle 1 at the time of the SOL collision.

  Here, at the time of the SOL collision, in order to move the reinforcing portion 40 so as to be pushed inward in the vehicle width direction and toward the rear side, the extension portion 50 and the second brace of the first brace 30 are moved. 60 needs to be appropriately deformed by the collision load at the time of the SOL collision so that the movement of the reinforcing portion 40 is not hindered.

  In the present embodiment, the extending portion 50 of the first brace 30 is configured to have an open cross-sectional shape with an opening in the vehicle width direction inside, and the second brace 60 has an open cross-section with an opening in the vehicle width direction outside. Since it is configured to have a shape, both of them are easily deformed by the collision load. In particular, the second brace 60 is configured so that the portion near the front side frame 5 has a low strength against the load in the vehicle width direction, and thus the collision load is input to the reinforcing portion 40. At this time, it is easily deformed by the collision load. Therefore, the movement of the reinforcing portion 40 is not hindered by the first brace extension 50 and the second brace 60 during the SOL collision. Therefore, in this embodiment, the lateral force can be efficiently generated with respect to the front portion of the vehicle 1 at the time of the SOL collision.

  Therefore, in this embodiment, it is possible to suppress as much as possible that the collision load at the time of the SOL collision of the vehicle 1 is transmitted to the vehicle interior of the vehicle 1.

  The present invention is not limited to the embodiment described above, and can be substituted without departing from the spirit of the claims.

  For example, in the above-described embodiment, the left and right first braces 30 have the reinforcing portion 40 and the extending portion 50, but the extending portion 50 is not necessarily required.

  Further, the lower end portion of the second brace 60 (in the above embodiment, the lower joint portion 66) may be joined to the frame outer wall portion 5b instead of being joined to the frame inner wall portion 5a. Alternatively, the entire second brace 60 can be eliminated.

  The above-described embodiments are merely examples, and the scope of the present invention should not be interpreted in a limited manner. The scope of the present invention is defined by the scope of the claims, and all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  The present invention includes a pair of left and right front side frames extending in the vehicle front-rear direction and formed in a closed cross-sectional shape at the front portion of the vehicle, and projecting outward in the vehicle width direction from the front side frames to the front side frames. It is useful for the front body structure of a vehicle provided with the protrusion part provided so.

DESCRIPTION OF SYMBOLS 1 Vehicle 5 Front side frame 7 Flange part of front side frame 5b Frame outer wall part (side wall part of vehicle side direction outer side of front side frame)
40 Reinforcement (projection)
43 Upper surface portion 43a Bead 44 Lower surface portion 44a Bead 45 Front surface portion 46 Rear surface portion 46a Rear side coupling flange (fixing portion)
47 Side part 72 Second node member

Claims (3)

A pair of left and right front side frames extending in the vehicle front-rear direction at the front portion of the vehicle, and a protrusion provided on each front side frame so as to protrude outward in the vehicle width direction from each front side frame , The front body structure of the vehicle,
Each protrusion provided on each front side frame is a protrusion provided on one front side frame when the vehicle collides frontward in the vehicle width direction outside one of the front side frames. It is configured so that a collision load is input to the part,
Each of the protrusions includes a front surface portion to which the collision load is input, a rear surface portion positioned on the vehicle rear side with respect to the front surface portion, and end portions on the vehicle width direction outer side of the front surface portion and the rear surface portion. A side surface portion to be connected, and an upper surface portion and a lower surface portion that face each other in the vertical direction and are joined to the front surface portion, the rear surface portion, and the side surface portion;
The vehicle width direction inner side end portion of the rear surface portion of each protrusion is fixed to the vehicle width direction outer side wall portion of each front side frame,
The upper surface portion of each protrusion is integrally fixed to the upper wall portion of each front side frame,
The lower surface portion of each protrusion is integrally fixed to the lower wall portion of each front side frame ,
A bead extending from the vicinity of the corner on the vehicle front side and the vehicle width direction outer side to the vicinity of the vehicle width direction inner side end portion of the rear surface portion is formed on at least one of the upper surface portion and the lower surface portion of each protrusion. A vehicle front body structure characterized by that. In the vehicle front body structure according to claim 1,
The front body of the vehicle is characterized in that a front portion of each projection is fixed to a flange provided at a front end of each front side frame and extends outward in the vehicle width direction from the flange. Construction. In the front body structure of a vehicle according to claim 1 or 2 ,
Each front side frame is formed in a closed cross-sectional shape,
The vehicle width direction inner side end portion of the rear surface portion of each protruding portion extends from the end portion of the rear surface portion in the vehicle width direction to the vehicle rear side, and the side wall portion on the vehicle width direction outer side of each of the front side frames. Fixed to the side wall portion of each front side frame on the outer side in the vehicle width direction through a fixing portion fixed to
A node member for partitioning the interior space of each front side frame in the vehicle front-rear direction is provided inside each front side frame so as to overlap the fixed portion of each protrusion in the vehicle front-rear direction. The front vehicle body structure of the vehicle.

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