JP2015091710A - Vehicular body front section structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a vehicular body front section structure capable of suppressing deformation of a vehicular body at a fine lap collision.SOLUTION: In a vehicular body front section structure 10, a high-strength-formed spacer 34 is attached to a rear surface side of a protrusion portion 16A of bumper reinforcement 16. When the protrusion portion 16A is deformed rearward of the vehicular body so as to be along a front side member 12 by the vehicle being subjected to a fine lap collision with a collision object 50, the spacer 34 takes an attitude in which its size in a vehicular body width direction increases with a distance toward a vehicular body. Therefore, when the collision object 50 is moved rearward relative to the vehicle in the state of the spacer 34 intervening between the collision object 50 and the front side member 12, the collision object 50 is subjected to the force toward one side in the vehicular body width direction, exerting the front side member 12 with reactive force toward the other side in the vehicular body width direction. With the reactive force, the vehicle is moved toward the other side in the vehicular body width direction, making it possible to decrease a lap amount between the collision object 50 and the vehicle.

Description

  The present invention relates to a vehicle body front structure.

  In the front structure of a vehicle described in Patent Document 1 below, a reinforcement extension joined to the outer end of the bumper reinforcement in the vehicle width direction extends in the vehicle rear direction (front tire side). At the rear end portion of the reinforcement extension, a convex portion is formed on the side member side, and when the vehicle collides with a collision object, the convex portion becomes a front side member. Abut. Accordingly, the reinforcement extension receives a reaction force from the outer side surface of the front side member in the vehicle width direction. Further, the convex portion is prevented from being displaced rearward by a stopper bracket fixed to the front side member. For this reason, not only the collision energy is absorbed by bending deformation of the reinforcement extension in the vehicle body width direction, but also the collision energy is absorbed by cross-sectional collapse of the reinforcement extension in the vehicle body front-rear direction. Thereby, the absorption performance of the collision energy at the time of a micro lap collision is improved.

JP 2008-213739 A

  By the way, in a minute lap collision, it is required to suppress deformation of the vehicle body (particularly the cabin).

  The present invention has been made in consideration of the above-described facts, and an object of the present invention is to obtain a vehicle body front structure that can suppress deformation of the vehicle body at the time of a minute lap collision.

  According to the first aspect of the present invention, a vehicle body front portion structure includes a front side member disposed on a side portion of a vehicle body front portion with a vehicle body longitudinal direction as a longitudinal direction, a vehicle body width direction disposed as a longitudinal direction, and the front side member A bumper reinforcement that is directly or indirectly connected to the front end portion of the member and has a protruding portion that protrudes outward in the vehicle width direction from the front side member, and the protruding portion that is formed with higher strength than the protruding portion. And a high-strength member formed so that the dimension in the vehicle front-rear direction increases as it goes outward in the vehicle width direction.

  In the first aspect of the present invention, a high-strength member formed with a higher strength than the protruding portion is attached to the rear surface side of the protruding portion of the bumper reinforcement. The high-strength member is formed so that the dimension in the longitudinal direction of the vehicle body increases as it goes outward in the vehicle width direction. Here, when a load is input from the front side of the vehicle body to the bumper reinforcement protrusion by causing the vehicle to make a micro lap collision with the collision object, the protrusion moves toward the rear side of the vehicle body along the front side member. Deform. Thus, in a state in which the protruding portion is deformed to the rear side of the vehicle body along the front side member, the high-strength member is in a posture in which the dimension in the vehicle body width direction increases toward the rear side of the vehicle body, and to the outside in the vehicle body width direction. The protruding amount of the spacer increases as it goes to the rear side of the vehicle body. In addition, since the high-strength member is formed to have a higher strength than the protruding portion, the outer shape can be maintained even after the protruding portion is deformed. For this reason, the collision object moves toward the rear side relative to the vehicle in a state where the high-strength member is interposed between the collision object and the front side member. A force acts, and a reaction force to the other side in the vehicle width direction acts on the front side member. Since the reaction force causes the vehicle to move to the other side in the vehicle body width direction, the amount of lap in the vehicle body width direction between the collision object and the vehicle can be reduced, so that deformation of the vehicle body can be suppressed.

  A vehicle body front portion structure according to a second aspect of the present invention is the vehicle body width direction outer side surface of the vehicle body skeleton member according to the first aspect, wherein the vehicle body skeleton member is formed with higher strength than the protruding portion and includes the front side member. In the state where the protrusion is deformed to the rear side of the vehicle body along the front side member due to the load from the front side of the vehicle body, the front end side is adjacent to the rear end side of the high-strength member vertically or front and rear. And an extension member disposed on the surface.

  In the invention according to claim 2, when the protruding portion of the bumper reinforcement is deformed to the rear side of the vehicle body along the front side member, the front end portion of the extension member fixed to the vehicle body skeleton member is the rear end of the high-strength member. Adjacent to the side up and down or front and back. The extension member is formed to have a higher strength than the protruding portion, like the high-strength member. For this reason, a high-strength member is interposed between the collision object and the front side member, and an extension member is interposed between the collision object and the vehicle body skeleton member. The generation time of the reaction force to the side (the side opposite to the collision object) can be extended. As a result, the vehicle can be effectively moved to the other side in the vehicle body width direction, so that the amount of lap in the vehicle body width direction between the collision object and the vehicle can be further reduced, and deformation of the vehicle body can be further suppressed. it can.

  A vehicle body front structure according to a third aspect of the present invention is the vehicle body front portion structure according to the second aspect, wherein the vehicle body skeleton member has a radiator support lower cross connected to a lower surface of a front end side of the front side member, and the extension member Is fixed to the outer surface of the radiator support lower cross in the vehicle width direction, and in a state where the projecting portion is deformed to the rear side of the vehicle body along the front side member by a load from the front side of the vehicle body, It has the 1st extension member arranged so that the front end side may be located under the rear end side.

  In the invention according to claim 3, when the protruding portion of the bumper reinforcement is deformed to the rear side of the vehicle body along the front side member, the front end of the first extension member fixed to the outer side surface of the radiator support lower cross in the vehicle width direction The rear end side of the high-strength member is disposed above the side. Therefore, the high-strength member is interposed between the collision object and the front side member, and the first extension member can be immediately interposed between the collision object and the radiator support lower cross. As a result, the reaction force acting on the vehicle body skeleton member toward the other side in the vehicle body width direction can be continuously generated, so that the vehicle can be moved more effectively to the other side in the vehicle body width direction. In addition, since the first extension member is fixed to the radiator support lower cross, it is possible to prevent the protruding portion deformed toward the rear side of the vehicle body from interfering with the first extension member with a simple configuration.

  According to a fourth aspect of the present invention, the vehicle body front portion structure according to the third aspect is the vehicle body of the front side member according to the third aspect, wherein the extension member is arranged with the front end side above the rear end side of the first extension member. It has the 2nd extending member fixed to the width direction outer side surface.

  In the invention according to claim 4, the second extension member formed with higher strength than the protruding portion of the bumper reinforcement has the front side disposed above the rear end side of the first extension member. It is fixed to the outer surface of the member in the vehicle width direction. For this reason, the first extension member is interposed between the collision object and the front side member, and immediately after the second extension member is interposed, the other side in the vehicle body width direction acting on the front side member (vehicle body skeleton member). The generation time of the reaction force can be further extended. As a result, the vehicle can be moved more effectively to the other side in the vehicle body width direction.

  According to a fifth aspect of the present invention, in the vehicle body front portion structure according to any one of the first to fourth aspects, a recess having an opening at the rear side of the vehicle body is formed in an intermediate portion in the vertical direction of the bumper reinforcement. The high-strength member is fitted in the recess.

  In the invention according to claim 5, the high-strength member is fitted in the concave portion formed in the intermediate portion in the vertical direction of the bumper reinforcement. For this reason, it can suppress that the space of a vehicle body front part becomes narrow with the arrangement | positioning space of a high intensity | strength member.

  A vehicle body front portion structure according to a sixth aspect of the present invention is the vehicle body front portion structure according to the fifth aspect, wherein the high-strength member is formed in an open cross-sectional shape having an opening on the rear side of the vehicle body when viewed from the vehicle width direction.

  In the invention according to claim 6, since the high-strength member is formed in an open cross-sectional shape with an opening on the rear side of the vehicle body, the weight of the high-strength member can be reduced. Moreover, if the high strength member contacts the front side member when the bumper reinforcement protrusion is deformed to the rear side of the vehicle body, a closed cross section can be formed by the high strength member and the vehicle body skeleton member. . Thereby, the strength when the high-strength member receives a compressive load between the collision object and the vehicle body skeleton member can be improved.

  According to a seventh aspect of the present invention, a vehicle body front portion structure includes a front cross member disposed on a side portion of a vehicle body front portion with a vehicle body longitudinal direction as a longitudinal direction, a vehicle body width direction disposed as a longitudinal direction, and the front side A protrusion that is connected directly or indirectly to the front end of the member and protrudes outward in the vehicle body width direction from the front side member, and is formed with higher strength than the protrusion, and the rear surface of the protrusion And a bumper reinforcement formed so that the dimension in the longitudinal direction of the vehicle body increases as the high strength portion provided on the side moves outward in the vehicle body width direction.

  In the seventh aspect of the present invention, a high-strength portion formed higher in strength than the protruding portion is provided on the rear surface side of the protruding portion of the bumper reinforcement. The high-strength portion is formed so that the dimension in the longitudinal direction of the vehicle body increases as it goes outward in the vehicle width direction. Here, when a load is input from the front side of the vehicle body to the bumper reinforcement protrusion by causing the vehicle to make a micro lap collision with the collision object, the protrusion moves toward the rear side of the vehicle body along the front side member. Deform. Thus, in a state in which the protruding portion is deformed to the rear side of the vehicle body along the front side member, the high-strength member is in a posture in which the dimension in the vehicle body width direction increases toward the rear side of the vehicle body, and to the outside in the vehicle body width direction. The protruding amount of the spacer increases as it goes to the rear side of the vehicle body. In addition, since the high-strength portion is formed with a higher strength than the protruding portion, the outer shape can be maintained even after the protruding portion is deformed. For this reason, the collision object moves toward the rear side relative to the vehicle in a state where the high-strength portion is interposed between the collision object and the front side member. A force acts, and a reaction force to the other side in the vehicle width direction acts on the front side member. Since the reaction force causes the vehicle to move to the other side in the vehicle body width direction, the amount of lap in the vehicle body width direction between the collision object and the vehicle can be reduced, so that deformation of the vehicle body can be suppressed.

  As described above, in the vehicle body front structure according to the present invention, deformation of the vehicle body at the time of a minute lap collision can be suppressed.

It is a top view which shows the vehicle body front part structure which concerns on 1st Embodiment of this invention. It is a perspective view of the vehicle body front part structure. It is a longitudinal cross-sectional view which shows the cut surface along line 3-3 in FIG. It is a top view corresponding to Drawing 1 showing the state where the projection part of bumper reinforcement in the same body front part structure changed so that a front side member might be met. It is a top view which shows the vehicle body front part structure which concerns on 2nd Embodiment of this invention. It is a perspective view of the vehicle body front part structure.

<First Embodiment>
The vehicle body front structure 10 according to the first embodiment of the present invention will be described below with reference to FIGS. In the figure, the arrow FR indicates the front of the vehicle body, the arrow UP indicates the upper side of the vehicle body, and the arrow OUT indicates the outside of the vehicle body width direction.

(Constitution)
As shown in FIGS. 1 and 2, the vehicle body front structure 10 according to this embodiment includes a front side member 12. The front side member 12 is a constituent member of the vehicle body skeleton member 11, and is disposed on both sides of the front portion of the vehicle body with the vehicle body longitudinal direction as the longitudinal direction. In addition, since this vehicle body front part structure 10 is comprised left-right symmetrically, illustration of the vehicle body center side and the vehicle body right side is abbreviate | omitted in FIG.1 and FIG.2.

  Crash boxes 14 are connected to the front end portions of the left and right front side members 12 by means such as bolt fastening. The left and right crash boxes 14 are set to have a lower proof strength against the axial compression load than the front side member 12. These crash boxes 14 are configured to absorb energy by axial compression deformation before the front side member 12 undergoes axial compression deformation when the vehicle has a frontal collision.

  A bumper reinforcement 16 arranged with the vehicle body width direction as a longitudinal direction is connected to front ends of the left and right crash boxes 14 by means such as bolt fastening. As shown in FIG. 3, the bumper reinforcement 16 is a so-called B-shaped cross-section type, and includes an upper wall 18, a lower wall 20, a front wall 22, and a rear wall 24. A bulging portion 26 bulging in a substantially U-shaped cross section toward the front side of the vehicle body is provided at an intermediate portion in the vertical direction of the rear wall 24. As a result, a recess 28 having an opening at the rear side of the vehicle body is formed at an intermediate portion in the vertical direction of the bumper reinforcement 16, and closed cross-section portions 30 and 32 are formed on both upper and lower sides of the recess 28.

  The bumper reinforcement 16 has left and right protruding portions 16A that protrude outward in the vehicle width direction from the left and right crash boxes 14. The left and right projecting portions 16A are gently curved so as to go to the rear side of the vehicle body as going outward in the vehicle width direction, and the length dimension along the curved direction (longitudinal direction) is along the vehicle body longitudinal direction of the crash box 14. It is set sufficiently longer than the length dimension. A spacer 34 as a high-strength member is attached to the rear surface side of these protruding portions 16A.

  The spacer 34 is formed in a long shape by, for example, pressing a sheet metal material, and is arranged in a state where the longitudinal direction is along the longitudinal direction of the protruding portion 16A. The spacer 34 includes a main body portion 34A fitted in the recess 28 of the projecting portion 16A, and a flange portion 34B extending from the rear end portion of the main body portion 34A and the outer end portion in the vehicle body width direction to both sides in the vehicle body vertical direction. As shown in FIG. 3, the cross-sectional shape viewed from the vehicle body width direction is formed into a substantially hat-shaped cross-section with an opening on the vehicle rear side.

  The main body portion 34A includes an upper wall portion 36 and a lower wall portion 38 that face each other in the vehicle body vertical direction, and a vertical wall portion 40 that connects the front end portions of the upper wall portion 36 and the lower wall portion 38 in the vehicle body vertical direction. In addition, it is formed in a substantially U-shaped cross section with the vehicle body rear side opened as viewed from the vehicle body width direction. The flange portion 34B includes a rear upper flange 42 extending upward from the rear end portion of the upper wall portion 36, a rear lower flange 44 extending downward from the rear end portion of the lower wall portion 38, and a vehicle body of the upper wall portion 36. A side-side upper flange 46 extending from the outer end in the width direction to the upper side of the vehicle body and a lower side flange 48 extending from the outer end in the vehicle width direction of the lower wall portion 38 to the lower side of the vehicle body are provided. The rear upper flange 42 and the rear lower flange portion 44 are fixed to the rear surface of the rear wall 24 of the protruding portion 16A by means such as bolt fastening, for example. In addition, the fixing method of the spacer 34 to 16 A of protrusion parts is not restricted above, It can change suitably.

  As shown in FIG. 1, the main body portion 34A is formed in a wedge shape (substantially right triangle shape) in plan view so that the dimension in the longitudinal direction of the vehicle body increases (increases gradually) toward the outside in the vehicle body width direction. Is formed. Specifically, the width dimension of the main body portion 34A along the opposing direction of the front wall 22 and the rear wall 24 is maximized at the outer end portion in the vehicle width direction of the protruding portion 16A, and the vertical wall portion of the main body portion 34A. 40 is arranged close to the front wall 22 of the protrusion 16A. Further, the width dimension of the main body portion 34A along the facing direction of the front wall 22 and the rear wall 24 gradually decreases toward the inner side in the vehicle body width direction, and the vehicle body of the main body portion 34A arranged in the vicinity of the crash box 14 It is substantially zero at the inner end in the width direction. In the main body portion 34A, the front surface 40A of the vertical wall portion 40 is disposed so as to be substantially along the vehicle body width direction.

  The above-described spacer 34 is formed with higher strength than the protruding portion 16A of the bumper reinforcement 16, and is configured to have higher proof stress against the compressive load than the protruding portion 16A. The material (material) of the spacer 34 is not limited to sheet metal and can be changed as appropriate. However, the spacer 34 is preferably formed with a high strength capable of withstanding a load of about 100 kN in the longitudinal direction and the width direction (the opposing direction of the front wall 22 and the rear wall 24). The spacer 34 is for suppressing deformation of the vehicle body when the vehicle has a minute lap collision. As shown in FIG. 1, the micro lap collision means that the front side member is generated when the vehicle collides with the collision object 50 with a small amount of lap in the vehicle body width direction between the collision object 50 (here, the barrier) and the vehicle. The collision form in which energy absorption by 12 axial compression deformation is not made sufficiently.

  In the vehicle body front structure 10 having the above-described configuration, an absorber (not shown) is attached to the front end surface of the bumper reinforcement 16 described above, and the absorber and the bumper reinforcement 16 are attached to the vehicle front side and the vehicle body width direction by a bumper cover (not shown). It is configured to be covered from both sides.

(Function and effect)
Next, the operation and effect of this embodiment will be described.

  In the vehicle body front structure 10 having the above configuration, when a load is input from the front side of the vehicle body to the protruding portion 16A of the bumper reinforcement 16 due to a minute lap collision with the collision object 50, the vehicle is shown in FIG. So that the protrusion 16A is deformed (bent) rearward along the front side member 12 so that the spacer 34 attached to the rear surface side of the protrusion 16A contacts the outer side surface of the front side member 12 in the vehicle width direction. To do. Since the spacer 34 is formed such that the dimension in the longitudinal direction of the vehicle body increases toward the outer side in the vehicle body width direction before the protrusion 16A is deformed, the spacer 34 is rearward in the state after the protrusion 16A is deformed. The outer side surface of the front side member 12 is in contact with the outer side surface in the vehicle width direction in a posture in which the size in the vehicle width direction increases toward the side (the state shown in FIG. 4).

  In this state, the protrusion amount of the spacer 34 from the outer side surface of the front side member 12 in the vehicle width direction increases as it moves toward the rear side of the vehicle body, and the front surface 40A of the vertical wall portion 40 of the spacer 34 increases toward the vehicle body rear side. It is inclined so as to go outward. Moreover, since the spacer 34 is formed with higher strength than the protrusion 16A, the outer shape of the spacer 34 can be maintained even after the protrusion 16A is deformed.

  For this reason, the spacer 34 is interposed between the collision object 50 and the front side member 12 (the spacer 34 and the protruding portion 16A are sandwiched between the bumper cover and absorber (not shown) and the front side member 12). As the collision object 50 moves rearward relative to the vehicle, a force in one side in the vehicle body width direction acts on the collision object 50 (the collision object 50 moves from the front surface 40A of the spacer 34 in the vehicle body width direction. Side force). Thereby, a reaction force F to the other side in the vehicle body width direction acts on the front side member 12 via the spacer 34. With this reaction force F, the front side member 12 can be effectively deformed to the other side in the vehicle body width direction, and the vehicle can be moved to the other side in the vehicle body width direction. Thereby, since the amount of laps between the collision object 50 and the vehicle in the vehicle body width direction can be reduced, deformation of the vehicle body can be suppressed. In particular, in a vehicle (sedan or the like) in which a cabin is provided at the center in the longitudinal direction of the vehicle body, the input to the cabin can be reduced, so that deformation of the cabin can be effectively suppressed.

  Further, in the present embodiment, the above-described spacer 34 is fitted into the recess 28 formed in the intermediate portion in the vertical direction of the bumper reinforcement 16. For this reason, it can suppress that the space of a vehicle body front part becomes narrow with the arrangement | positioning space of the spacer 34. FIG.

  Furthermore, in this embodiment, the spacer 34 is formed in the open cross-sectional shape which the vehicle body rear side opened. Thereby, the spacer 34 can be reduced in weight. Moreover, the spacer 34 forms a closed cross-section with the front side member 12 in a state where the protruding portion of the bumper reinforcement is in contact with the outer side surface in the vehicle width direction of the front side member 12 by being deformed to the rear side of the vehicle body. Thereby, the strength when the spacer 34 receives a compressive load between the collision object 50 and the front side member 12 can be improved.

<Second Embodiment>
Next, a second embodiment of the present invention will be described. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol as the said 1st Embodiment is provided, and the description is abbreviate | omitted.

  FIG. 5 is a plan view showing a vehicle body front structure 60 according to the second embodiment of the present invention. FIG. 6 shows the vehicle body front structure 60 in a perspective view. This embodiment has basically the same configuration as the first embodiment except that a first extension spacer 62 as a first extension member and a second extension spacer 64 as a second extension member are added. There is a feature in that. The first extension spacer 62 is formed in a block shape from the same material as the spacer 34, and has the same strength as the spacer 34. The first extension spacer 62 is fixed to the outer surface in the vehicle width direction of a radiator support lower cross 66 (not shown in FIG. 2) connected to the lower surface on the front end side of the front side member 12. In the first extension spacer 62, an inclined surface 62C is formed between the outer surface 62A in the vehicle body width direction and the front surface 62B. The inclined surface 62C is formed so as to go inward in the vehicle body width direction as it goes toward the vehicle body front side. The first extension spacer 62 has a front end portion near the lower end of the rear end portion of the spacer 34 in a state in which the protruding portion 16A is deformed to the rear side of the vehicle body along the front side member 12 (see the two-dot chain line in FIG. 5). Is arranged to be located. The radiator support lower cross 66 constitutes the vehicle body skeleton member 11 together with the front side member 12.

  On the other hand, the second extension spacer 64 has basically the same configuration as that of the first extension spacer 62, and the front side member is arranged in a state where the front end portion is disposed near the upper end portion of the first extension spacer 62. 12 is fixed to the outer surface in the vehicle body width direction. In the second extension spacer 64, an inclined surface 64C is formed between the vehicle body width direction outer side surface 64A and the front surface 64B. The inclined surface 64C is formed so as to go inward in the vehicle body width direction as it goes toward the vehicle body front side.

  The width dimension L1 along the vehicle width direction of the first extension spacer 62 and the second extension spacer 64 is set to the same dimension, and the outer side surface 62A of the first extension spacer 62 in the vehicle width direction and the second extension spacer 64 The vehicle body width direction outer side surface 64A is arranged on the same plane. The width dimension L1 is set to be equal to the width dimension L2 of the outer end portion of the spacer 34 in the vehicle width direction. For this reason, in a state where the protrusion 16A is deformed rearwardly along the front side member 12 and the spacer 34 is in contact with the front side member 12 (see the two-dot chain line in FIG. 5), the front surface 40A of the spacer 34 is The rear end and the outer side surface 62A of the first extension spacer 62 in the vehicle width direction are arranged at substantially the same position in the vehicle width direction. In this state, in the plan view shown in FIG. 5, the first extension spacer 62 extends rearward of the spacer 34 and the second extension spacer 64 extends rearward of the first extension spacer 62. A first extension spacer 62 and a second extension spacer 64 are arranged.

  The fixing method of the first extension spacer 62 to the radiator support lower cross 66 and the fixing method of the second extension spacer 64 to the front side member 12 are preferably those that can be firmly fixed such as bolt fastening or welding. It is not limited to this method.

  In the present embodiment, when the protrusion 16A of the bumper reinforcement 16 is deformed to the rear side of the vehicle body due to the load from the collision object 50 and the spacer 34 contacts the outer side surface of the front side member 12 in the vehicle width direction, the radiator support lower cross 66 The rear end portion of the spacer 34 is disposed in the vicinity of the upper end portion of the first extension spacer 62 fixed to the outer surface in the vehicle body width direction. Since the first extension spacer 62 is formed with a higher strength than the protruding portion 16A, like the spacer 34, the spacer 34 is interposed between the collision object 50 and the front side member 12, and the first extension is immediately performed. By interposing the spacer 62 between the collision object 50 and the front side member 12, a reaction force F acting on the front side member 12 toward one side in the vehicle width direction can be continuously generated. As a result, the vehicle can be effectively moved to the other side in the vehicle body width direction (the side opposite to the collision object 50), so that the amount of lap in the vehicle body width direction between the collision object 50 and the vehicle can be further reduced. Further, the deformation of the vehicle body can be further suppressed.

  In addition, in this embodiment, the second extension spacer 64 formed with higher strength than the protrusion 16A of the bumper reinforcement 16 has a front end disposed in the vicinity of the upper end of the rear end of the first extension spacer 62. The front side member 12 is fixed to the outer side surface in the vehicle width direction. Therefore, the first extension spacer 62 is interposed between the collision object 50 and the front side member 12, and the second extension spacer 64 is immediately interposed between the collision object 50 and the front side member 12. The generation time of the reaction force F acting on the other side in the vehicle body width direction acting on the side member 12 can be further extended. As a result, the vehicle can be moved more effectively to the other side in the vehicle body width direction, so that the amount of lap in the vehicle body width direction between the collision object 50 and the vehicle can be further reduced, and the deformation of the vehicle body can be further reduced. Can be suppressed.

  Further, in this embodiment, since the first extension spacer 62 is fixed to the radiator support lower cross 66, it is easy to prevent the protruding portion 16A deforming toward the rear side of the vehicle body from interfering with the first extension member 62. It can be prevented by the configuration. Further, since the inclined surfaces 62C and 64C are provided on the first extension spacer 62 and the second extension spacer 64, when the collision object 50 comes into sliding contact with the first extension spacer 62 and the second extension spacer 64, the impact is applied to the vehicle body side. Can be prevented or suppressed.

<Supplementary explanation of the embodiment>
In the second embodiment, the first extension spacer 62 (first extension member) fixed to the radiator support lower cross 66 and the second extension spacer 64 (second extension member) fixed to the front side member 12 are used. Although the case where the extending member is configured has been described, the present invention is not limited to this, and the configuration of the extending member can be changed as appropriate. For example, the first extension member and the second extension member may be integrally formed. Further, for example, in the second embodiment, the first extending member 62 is omitted, and the front end portion of the second extending member 64 is close to the rear end portion of the spacer 64 indicated by a two-dot chain line in FIG. Then, they may be configured to be adjacent (lined up).

  In the second embodiment, the first extension spacer 62 (first extension member) is fixed to the radiator support lower cross 66. However, the present invention is not limited to this, and for example, no radiator is provided. In a vehicle (such as an electric vehicle), the first extension member is fixed to another skeleton member connected to the front side member.

  In each of the above embodiments, the spacer 34 (high-strength member) is configured to have an open cross-sectional shape with an opening on the rear side of the vehicle body when viewed from the vehicle body width direction. The shape of the strength member can be changed as appropriate. For example, the high strength member may be formed in a closed cross-sectional shape when viewed from the vehicle body width direction.

  Moreover, in each said embodiment, although the spacer 34 was set as the structure engage | inserted in the recessed part 28 formed in the bumper reinforcement 16, this invention is not restricted to this, When bumper reinforcement is not provided with the recessed part. May be configured to attach a high-strength member to the upper surface side, the lower surface side, or both of the bumper reinforcement.

  In each of the above embodiments, the bumper reinforcement 16 is connected to the front end of the front side member 12 via the crash box 14, but the present invention is not limited to this, and the bumper reinforcement is the front side member. It may be configured to be directly connected to the front end of the.

  Further, in each of the above-described embodiments, the spacers 34 are in contact with the front side member 12 by deforming the protruding portion 16A to the rear side of the vehicle body along the front side member 12, but the present invention is not limited thereto. Alternatively, the high-strength member may not be in direct contact with the front side member, and another member (for example, a part of the protruding portion) may be interposed between the high-strength member and the front side member.

  In each of the above embodiments, the front surface 40A of the spacer 34 is formed in a flat shape. However, the present invention is not limited to this, and the front surface of the high-strength member may be formed in a curved shape. .

  Furthermore, in each said embodiment, although the spacer 34 formed separately from the bumper reinforcement 16 was set as the structure attached to the protrusion part 16A of the bumper reinforcement 16, this invention is not restricted to this, A bumper You may make it the structure which integrally provides the high intensity | strength part higher intensity | strength than a protrusion part in the rear surface side in the protrusion part of reinforcement.

  In addition, the present invention can be implemented with various modifications without departing from the scope of the invention. Needless to say, the scope of rights of the present invention is not limited to the above embodiments.

DESCRIPTION OF SYMBOLS 10 Car body front part structure 11 Car body frame | skeleton member 12 Front side member 16 Bumper reinforcement 16A Protrusion part 28 Concave part 34 Spacer (high-strength member)
60 Front body structure 62 First extension spacer (first extension member)
64 Second extension spacer (second extension member)
66 Radiator support lower cross

According to the first aspect of the present invention, a vehicle body front portion structure includes a front side member disposed on a side portion of a vehicle body front portion with a vehicle body longitudinal direction as a longitudinal direction, a vehicle body width direction disposed as a longitudinal direction, and the front side member A bumper reinforcement that is directly or indirectly connected to the front end portion of the member and has a protruding portion that protrudes outward in the vehicle width direction from the front side member, and the protruding portion that is formed with higher strength than the protruding portion. high strength member is mounted et the rear side parts, than the protruding portion is formed with high strength, is fixed to the vehicle width direction outer side of the vehicle body framework member that is structured to include the front side member, said projection In a state where the portion is deformed to the rear side of the vehicle body along the front side member due to a load from the front side of the vehicle body, the front end side is vertically or And a, an extension member which is disposed so as to be adjacent back and forth.

In the first aspect of the present invention, a high-strength member formed with a higher strength than the protruding portion is attached to the rear surface side of the protruding portion of the bumper reinforcement . In here, by the vehicle a small overlap impact against the impact object, when a load from the vehicle front side to the protrusion of the bumper reinforcement is input, the projecting portion is a vehicle body rear side along the front side member Transforms into In the deformed state to the vehicle body rear side so as protrusions in this manner along the front side member, a high strength member, the attitude of it suited to the vehicle body rear side. In addition, since the high-strength member is formed to have a higher strength than the protruding portion, the outer shape can be maintained even after the protruding portion is deformed. For this reason, the collision object moves toward the rear side relative to the vehicle in a state where the high-strength member is interposed between the collision object and the front side member. A force acts, and a reaction force to the other side in the vehicle width direction acts on the front side member. Since the reaction force causes the vehicle to move to the other side in the vehicle body width direction, the amount of lap in the vehicle body width direction between the collision object and the vehicle can be reduced, so that deformation of the vehicle body can be suppressed.
Further, according to the present invention, when the bumper reinforcement projecting portion is deformed to the rear side of the vehicle body along the front side member, the front end portion of the extension member fixed to the vehicle body skeleton member is vertically aligned with the rear end side of the high strength member. Or next to each other. The extension member is formed to have a higher strength than the protruding portion, like the high-strength member. For this reason, a high-strength member is interposed between the collision object and the front side member, and an extension member is interposed between the collision object and the vehicle body skeleton member. The generation time of the reaction force to the side (the side opposite to the collision object) can be extended. As a result, the vehicle can be effectively moved to the other side in the vehicle body width direction, so that the amount of lap in the vehicle body width direction between the collision object and the vehicle can be further reduced, and deformation of the vehicle body can be further suppressed. it can.

A vehicle body front part structure according to a second aspect of the present invention is the vehicle body front portion structure according to the first aspect, wherein the high-strength member has a flange portion extending in the vehicle vertical direction, and the flange portion is a rear wall of the protruding portion. It is fixed to the rear surface.

According to a seventh aspect of the present invention, a vehicle body front portion structure includes a front side member disposed on a side portion of a vehicle body front portion with a vehicle body longitudinal direction as a longitudinal direction, a vehicle body width direction disposed as a longitudinal direction, and the front side A high-strength portion that is directly or indirectly connected to the front end portion of the member and has a protruding portion that protrudes outward in the vehicle width direction from the front side member, and is formed with higher strength than the protruding portion. a bar lymph reinforcement provided on the rear surface side of the projecting portion than said protrusion is formed on the high-strength, is fixed to the vehicle width direction outer side of the vehicle body framework member that is structured to include the front side member, the In a state where the protruding portion is deformed to the rear side of the vehicle body along the front side member due to a load from the front side of the vehicle body, the front end side is adjacent to the rear end side of the high-strength portion vertically or front and rear. And a, an extension member disposed to fit.

In the seventh aspect of the present invention, a high-strength portion formed higher in strength than the protruding portion is provided on the rear surface side of the protruding portion of the bumper reinforcement . In here, by the vehicle a small overlap impact against the impact object, when a load from the vehicle front side to the protrusion of the bumper reinforcement is input, the projecting portion is a vehicle body rear side along the front side member Transforms into In the deformed state to the vehicle body rear side, as this way protrusion along the front side members, high-strength portion becomes the attitude Let suited to the vehicle body rear side. In addition, since the high-strength portion is formed with a higher strength than the protruding portion, the outer shape can be maintained even after the protruding portion is deformed. For this reason, the collision object moves toward the rear side relative to the vehicle in a state where the high-strength portion is interposed between the collision object and the front side member. A force acts, and a reaction force to the other side in the vehicle width direction acts on the front side member. Since the reaction force causes the vehicle to move to the other side in the vehicle body width direction, the amount of lap in the vehicle body width direction between the collision object and the vehicle can be reduced, so that deformation of the vehicle body can be suppressed.
Further, according to the present invention, when the bumper reinforcement projecting portion is deformed to the rear side of the vehicle body along the front side member, the front end portion of the extension member fixed to the vehicle body skeleton member is vertically aligned with the rear end side of the high strength portion. Or next to each other. The extension member is formed to have a higher strength than the protruding portion, as with the high strength portion. For this reason, the high-strength portion is interposed between the collision object and the front side member, and the extension member is interposed between the collision object and the vehicle body skeleton member. The generation time of the reaction force to the side (the side opposite to the collision object) can be extended. As a result, the vehicle can be effectively moved to the other side in the vehicle body width direction, so that the amount of lap in the vehicle body width direction between the collision object and the vehicle can be further reduced, and deformation of the vehicle body can be further suppressed. it can.
According to an eighth aspect of the present invention, in the vehicle body front portion structure according to any one of the first to seventh aspects, a crash box is connected to a front end portion of the front side member, and the protruding portion The length dimension along the longitudinal direction is set longer than the length dimension along the vehicle body longitudinal direction of the crash box.

<First Embodiment>
The vehicle body front structure 10 according to the first embodiment of the present invention will be described below with reference to FIGS. In the figure, the arrow FR indicates the front of the vehicle body, the arrow UP indicates the upper side of the vehicle body, and the arrow OUT indicates the outside of the vehicle body width direction. This first embodiment is a reference example.

Claims (7)

A front side member disposed on the side of the front part of the vehicle body with the longitudinal direction of the vehicle body as a longitudinal direction;
A bumper reinforcement that is arranged with the vehicle body width direction as a longitudinal direction, is directly or indirectly connected to the front end portion of the front side member, and has a protrusion protruding outward in the vehicle body width direction from the front side member;
A high-strength member that is formed with higher strength than the protrusion and is attached to the rear surface side of the protrusion, and is formed such that the dimension in the vehicle longitudinal direction increases toward the outer side in the vehicle body width direction;
Body front structure with   It is formed with higher strength than the projecting portion, and is fixed to a vehicle body width direction outer side surface of a vehicle body skeleton member including the front side member, and the projecting portion is applied to the front side member by a load from the front side of the vehicle body. 2. The vehicle body front structure according to claim 1, further comprising an extension member disposed so that a front end side thereof is adjacent to a rear end side of the high-strength member in a vertical or front-rear direction in a state of being deformed to the rear side of the vehicle body. The vehicle body skeleton member has a radiator support lower cross connected to a lower surface on the front end side of the front side member,
The extension member is fixed to an outer surface of the radiator support lower cross in the vehicle width direction, and the protrusion is deformed toward the rear side of the vehicle body along the front side member by a load from the front side of the vehicle body. The vehicle body front part structure according to claim 2, further comprising a first extension member disposed so that the front end side is positioned below the rear end side of the strength member.   The said extension member has the 2nd extension member fixed to the vehicle body width direction outer side surface of the said front side member in the state by which the front-end side is arrange | positioned above the rear-end side of the said 1st extension member. Body front structure.   5. The bumper reinforcement has a concave portion that is open at a rear side of the vehicle body at an intermediate portion in the vertical direction, and the high-strength member is fitted into the concave portion. Vehicle body front structure as described.   The vehicle body front structure according to claim 5, wherein the high-strength member is formed in an open cross-sectional shape having an opening on the rear side of the vehicle body when viewed from the vehicle body width direction. A front cross member arranged on the side of the front part of the vehicle body with the longitudinal direction of the vehicle body as a longitudinal direction;
The protrusion is arranged with the vehicle body width direction as a longitudinal direction, and is directly or indirectly connected to the front end of the front side member, and has a protrusion protruding outward in the vehicle width direction from the front side member, Bumper reinforcement formed so that the dimension in the longitudinal direction of the vehicle body increases as the high-strength portion formed on the rear surface side of the projecting portion is formed in a higher strength than the vehicle width direction outward,
Body front structure with

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