JP2006137326A - Front part structure of car body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide front part structure of a car body capable of restricting deformation of a cabin by efficiently absorbing energy when front collision occurs, besides restricting intrusion of structuring members of an opposite vehicle when the front collision occurs. <P>SOLUTION: A lower member 38 is arranged to be continued to a sub frame 40 along the fore and aft direction of the vehicle under a front side member 12. An interference structure part 24 formed into a stairs shape with a side view is set between a car cross directional end 34A of a radiator support lower 34 and the lower member 38. An upper part 24B of the interference structure part 24 is arranged to abut on a lower back surface of a radiator 22 or to come close to there. A collision load input to the radiator 22 is transmitted to the upper part 24B of the interference structure part 24, and thereafter, transmitted from a lower part 24A of the interference structure part 24 to the lower member 38, the sub frame 40 and a lower part 12C of the front side member 12 in order. Deformation of the cabin 15 is thereby restricted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention includes a pair of left and right front side members disposed on both sides of the front portion of the vehicle body as the longitudinal direction of the vehicle, and a pair of left and right front side members disposed on the front end portion of the vehicle body as the longitudinal direction of the vehicle width direction. A front bumper reinforcement that connects the front ends of the front bumper reinforcement, and a wall body that is disposed close to the vehicle rear side of the front bumper reinforcement and forms a substantially vertical surface, to which a collision load is input during a frontal collision. It is related with the vehicle body front part structure comprised by these.

  The following Patent Document 1 discloses a technique for preventing the intrusion of a structural member or a power unit of an opponent vehicle at the time of a frontal collision by providing a flat U-shaped frame-like structure in front view at the lower part of the front part of the vehicle body. ing.

  In brief, the front end portion of the front side member is connected to the front bumper reinforcement via an impact absorbing member. Further, below the front side member, a lower vertical rod member having a longitudinal direction in the vehicle front-rear direction is disposed in parallel in a suspended state by a connection support member and a connecting material. Furthermore, the lower ends of the left and right connection support members are connected by a horizontal beam arranged substantially parallel to the front bumper reinforcement.

As a result, a flat U-shaped frame portion composed of a cross beam and a pair of left and right vertical connecting members is formed below the front end portion of the front side member, and the front of the vehicle body such as a structural member of the counterpart vehicle at the time of a frontal collision. It is to prevent penetration into the part.
Special table 2003-513856 gazette

  However, according to the above-described prior art, a gap is formed between the front bumper reinforcement and the U-shaped frame-like portion, and there is no structure that catches intrusion of the structural member or the like of the counterpart vehicle. Therefore, it is difficult to achieve the intended purpose.

  In consideration of the above fact, the present invention not only suppresses the intrusion of the structural member of the opponent vehicle at the time of a frontal collision, but also suppresses deformation of the cabin by efficiently absorbing energy at the time of the frontal collision. The purpose is to obtain a partial structure.

  The vehicle body front structure according to the first aspect of the present invention includes a pair of left and right front side members disposed on both sides of the vehicle body front portion with the vehicle front-rear direction as the longitudinal direction, and a vehicle width direction extending longitudinally at the vehicle front end portion. A front bumper reinforcement that is arranged as a direction and connects the front ends of a pair of left and right front side members, and is arranged close to the vehicle rear side of this front bumper reinforcement and constitutes a substantially vertical surface, and collides at the time of a frontal collision A vehicle body front structure configured to include a wall body to which a load is input, and is disposed along a vehicle front-rear direction on a lower side of the front side member, and a rear end side is coupled to a vehicle body structural member. It has a pair of left and right front and rear direction members, and when a load is applied to the wall body at the time of a frontal collision, both lower ends in the vehicle width direction of the wall body interfere with the front end portion of the front and rear direction member It was set interference structure portion as the front-rear direction load is transmitted to the front-rear direction member, and characterized in that.

  A vehicle body front structure according to a second aspect of the present invention is the vehicle body front structure according to the first aspect of the invention, wherein the wall body is a radiator, and the vehicle width direction is elongated to the lower edge side of the radiator by a load input to the radiator. Both ends of the radiator support lower disposed as a direction interfere with the front end of the front-rear direction member directly or via a member.

  According to a third aspect of the present invention, in the vehicle body front portion structure according to the first or second aspect, the front-rear direction member includes a rear member that forms part of a subframe, the rear member, and the wall. And a front member disposed between the body and the body.

  According to a fourth aspect of the present invention, there is provided a vehicle body front portion structure according to the third aspect, wherein the interference structure portion is set at a front end portion of the front member.

  According to a fifth aspect of the present invention, in the vehicle body front portion structure according to the first aspect, the interference structure portion overlaps the wall body in the vehicle vertical direction in a side view. Thus, it is characterized by including the extension part extended to the vehicle upper side.

  According to the first aspect of the present invention, when a load is input to the vehicle rear side of the wall body arranged close to the vehicle rear side of the front bumper reinforcement at the time of a frontal collision, Since an interference structure is set between the lower ends of both ends and the front end of the front / rear direction member disposed on the lower side of the front side member, when a load to the vehicle rear side is input to the wall, Lower portions at both ends of the body in the vehicle width direction interfere with the front end portions of the pair of left and right front and rear direction members, and a front and rear direction load (in this case, a load on the vehicle rear side) is transmitted (flowed). Since the rear end portion of the front-rear direction member is coupled to the vehicle body structural member, the collision load is finally transmitted (flowed) to the vehicle body structural member.

  Therefore, since the transmission (energy absorption) of the collision load is started from the initial stage at the time of the frontal collision, the vehicle deceleration characteristic is improved. That is, it becomes a vehicle deceleration characteristic in which energy absorption is started at an early stage. As a result, an input load to the cabin can be reduced, and deformation of the cabin can be suppressed.

  Since the wall is located close to the rear side of the front bumper reinforcement and constitutes a substantially vertical surface, the structural member of the opponent vehicle enters the front of the vehicle body when a frontal collision occurs with the vehicle. Can be suppressed.

  According to this invention of Claim 2, a radiator is utilized as a wall body. For this reason, the intrusion of the structural member of the opponent vehicle at the time of the frontal collision is blocked by the radiator. In this case, the load to the rear side of the vehicle is input to the radiator. In the present invention, both ends of the radiator support lower disposed in the longitudinal direction of the vehicle width direction on the lower edge side of the radiator are directly or via a member in the front-rear direction. In order to interfere with the front end portion of the member, the load is transmitted and flows in the order of the radiator, the radiator support lower, the pair of left and right front and rear direction members, and the vehicle body constituting member. That is, in the case of the present invention, both end portions of the radiator support lower or members (intervened between the both end portions and the front end portion of the front-rear direction member) function as the above-described interference structure portion.

  Furthermore, as described above, the existing radiator is used as the wall body, and the existing radiator support lower is used to transmit the load from the radiator to the front-rear direction member. Therefore, the load transmission path is secured by effectively utilizing the existing parts. can do.

  According to the third aspect of the present invention, the front-rear direction member includes a rear member that forms part of the subframe, and a front member that is disposed between the rear member and the wall. Therefore, only the front member may be newly provided for the present invention with respect to the longitudinal member. In other words, by effectively utilizing the existing subframe, the member length of the newly installed portion (front member) can be shortened.

  According to the fourth aspect of the present invention, since the interference structure portion is set at the front end portion of the front member of the front-rear direction member, a component newly added to one newly installed component (that is, the front member) All structures are aggregated. Therefore, the existing parts can be utilized to the maximum extent.

  According to the fifth aspect of the present invention, the interference structure portion is configured to include an extension portion that extends to the vehicle upper side so as to overlap the wall body in the vehicle vertical direction in a side view. When a load is input to the wall body, the wall body interferes with the extending portion, whereby the load is transmitted from the wall body to the extending portion and is transmitted to the front-rear direction member. Therefore, the input load to the wall body can be reliably transmitted to the front-rear direction member.

  The vehicle body front structure according to the first aspect of the present invention includes a pair of left and right front side members disposed on both sides of the vehicle body front portion with the vehicle front-rear direction as the longitudinal direction, and a vehicle width direction extending longitudinally at the vehicle front end portion. A front bumper reinforcement that is arranged as a direction and connects the front ends of a pair of left and right front side members, and is arranged close to the vehicle rear side of this front bumper reinforcement and constitutes a substantially vertical surface, and collides at the time of a frontal collision A vehicle body front structure configured to include a wall to which a load is input, and is arranged along the vehicle front-rear direction on the lower side of the front side member, and a pair of left and right ends coupled to the vehicle body constituent member It has a front-rear direction member, and by the load input to the wall body at the time of a frontal collision, the lower ends of both ends of the wall body in the vehicle width direction interfere with the front end portion of the front-rear direction member and Since the interference structure is set so that the longitudinal load is transmitted to the directional member, it not only suppresses the intrusion of the structural member of the opponent vehicle at the time of frontal collision, but also efficiently absorbs energy at the time of frontal collision It has an excellent effect that the deformation of the cabin can be suppressed.

  The vehicle body front structure according to the second aspect of the present invention includes a radiator support lower that is configured such that a radiator is used as a wall body, and a vehicle width direction is disposed on the lower edge side of the radiator as a longitudinal direction by load input to the radiator. Since both ends are configured to interfere with the front end of the front-rear direction member directly or via a member, it is possible to secure a load transmission path by effectively utilizing existing parts. It has an excellent effect that the object can be achieved.

  According to a third aspect of the present invention, the vehicle body front portion structure according to the first or second aspect of the present invention is disposed between the rear member forming a part of the subframe and the rear member and the wall body. Since the front-rear member described above is configured including the front member, only the front member needs to be newly provided for the present invention with respect to the front-rear member, and as a result, similar to the invention according to claim 2 In addition, it has an excellent effect that the intended purpose can be achieved at low cost.

  The vehicle body front structure according to the present invention as defined in claim 4 is the invention according to claim 3, wherein the interference structure portion is set at the front end of the front member, so that existing parts can be utilized to the maximum extent possible. As a result, it has an excellent effect that the intended purpose can be achieved at a minimum cost.

  According to a fifth aspect of the present invention, in the vehicle body front portion structure according to the first aspect, the interference structure portion overlaps the wall body in the vehicle vertical direction in a side view. Since it is configured to include an extending part that extends to the upper side of the vehicle, the input load to the wall body can be reliably transmitted to the front-rear direction member, and as a result, reliability for energy absorption at the initial stage of frontal collision is improved. It has an excellent effect that it can be increased.

  Hereinafter, an embodiment of a vehicle body front structure according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow IN indicates the vehicle width direction inner side.

  FIG. 1 shows a side view of a vehicle body front structure according to the present embodiment. As shown in this figure, a pair of left and right front side members 12 is disposed on both sides of the vehicle body front portion 10 with the longitudinal direction of the vehicle being the longitudinal direction. The front side member 12 includes a main body portion 12A that extends linearly along the vehicle front-rear direction, a kick-up portion 12B that is set to bend obliquely downward from a rear end portion of the main body portion 12A, and the kick-up portion. The rear portion 12C extends from the lower end portion of 12B to the lower surface side of the vehicle body floor (not shown). The rear end portion of the kick-up portion 12B is coupled to a dash panel 16 that separates the engine room 14 and the cabin 15. The front side member 12 is formed in a substantially cylindrical shape (closed cross-sectional structure) by connecting a front side member outer panel and a front side member inner panel.

  At the front ends of the pair of left and right front side members 12, a substantially cylindrical crash box 18 is attached by bolts 17A and nuts 17B, which are subjected to axial compression plastic deformation when a collision load of a predetermined value or more is input. Yes. Further, the front end portions of the left and right crash boxes 18 are connected to each other by a long front bumper reinforcement 20 arranged with the vehicle width direction as a longitudinal direction. Thereby, the load input to the front bumper at the time of a frontal collision is efficiently transmitted to the left and right crash boxes 18 and the front side member 12. A structure in which both the front side member 12 and the crash box 18 are combined corresponds to the “front side member” in the present invention.

  The front bumper reinforcement 20 is a strength member that constitutes a part of the front bumper, and an absorber and a front bumper cover (not shown) are disposed on the front side thereof.

  Further, a radiator 22 as a wall body is disposed in the vicinity of the front bumper reinforcement 20 at the front end of the vehicle body front portion 10 (the vehicle rear side of the front bumper reinforcement 20). The radiator 22 is a thin structure disposed along the longitudinal direction of the front bumper reinforcement 20, has a substantially rectangular shape when viewed from the front, and is erected substantially perpendicular to the vehicle horizontal plane.

  The radiator 22 is supported on the vehicle body side by a radiator support 30. The radiator support 30 is configured in a substantially rectangular frame shape when viewed from the front, and is disposed with the vehicle width direction as a longitudinal direction and a radiator support upper (not shown) that supports the upper edge side of the radiator 22, and the vehicle width direction as a longitudinal direction. A radiator support lower 34 that supports the lower edge side of the radiator 22 and a pair of left and right vertical columns (not shown) that support both side portions of the radiator 22 are configured.

  Here, on the lower side of the pair of left and right front side members 12 described above, long lower members 38 are disposed as front and rear direction members whose longitudinal direction is substantially the front and rear direction of the vehicle. The lower member 38 has a closed cross-sectional structure. The rear end portion of the lower member 38 is coupled to the front end portion of a subframe (front suspension member) 40 as a rear member disposed at the lower part of the vehicle body. The rear end portion of the sub frame 40 is coupled to the rear portion 12 </ b> C of the front side member 12. In the case of the present embodiment, the rear portion 12C of the front side member 12 that is a coupling partner of the rear end portion of the subframe 40 corresponds to the vehicle body constituting member in the present invention.

  A front end portion of the lower member 38 is coupled to an end portion 34A of the radiator support lower 34 in the vehicle width direction (hereinafter, this portion is referred to as an “interference structure portion 24”). More specifically, the interference structure portion 24 has a step shape with a hollow cross-sectional view in a side view, and includes a lower portion 24A and an upper portion 24B as an extension portion. The lower portion 24 </ b> A is an end 34 </ b> A itself of the radiator support lower 34 in the vehicle width direction or a portion obtained by extending the radiator support lower 34. Further, the upper portion 24B extends integrally from the rear end portion of the lower portion 24A toward the vehicle upper side and is disposed in any of a contact state, a combined state, and a close state on the rear surface of the radiator 22. That is, the upper part 24B of the interference structure part 24 overlaps the lower part of the radiator 22 in the vehicle vertical direction in a side view. In addition, it is arbitrary whether the upper part 24B and the radiator 22 are couple | bonded. Further, the rear end wall of the lower portion 24A and the front end portion of the lower member 38 are coupled by fixing means such as bolts and nuts.

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

  The state shown in FIG. 1 is the state of the vehicle body front portion 10 before the frontal collision. When a frontal collision with the opponent vehicle occurs from this state, the collision load at the time of the frontal collision is input to the front bumper reinforcement 20. For this reason, the pair of left and right crash boxes 18 coupled to both ends of the front bumper reinforcement 20 in the longitudinal direction undergo axial compression plastic deformation in the vehicle front-rear direction and perform predetermined energy absorption.

  When the deformation amount of the crash box 18 reaches a predetermined amount, the collision load F toward the vehicle rear side is input to the radiator 22 disposed close to the vehicle rear side of the front bumper reinforcement 20. When the radiator 22 is pressed toward the vehicle rear side and displaced in the pressing direction, the lower portion of the radiator 22 and the upper portion 24B of the interference structure portion 24 provided at the end portion 34A of the radiator support lower 34 in the vehicle width interfere with each other. The collision load F is distributed to the left and right to become the collision load f1, and is input to the upper portion 24B. The collision load f1 input to the upper portion 24B of the interference structure portion 24 is input to the lower member 38 from the lower portion 24A of the interference structure portion 24 of the radiator support lower 34 (load f2). Thereafter, the load f2 input to the lower member 38 passes through the subframe 40 (load f3) and is transmitted (flowed) to the rear portion 12C of the front side member 12 as the load f4.

  Therefore, since the transmission (energy absorption) of the collision load f1 is started from the initial stage at the time of the frontal collision, the vehicle deceleration characteristic is improved. That is, it becomes a vehicle deceleration characteristic in which energy absorption at the time of a frontal collision is started at an early stage. As a result, an input load to the cabin 15 can be reduced, and deformation of the cabin 15 can be suppressed.

  Since the radiator 22 is disposed close to the vehicle rear side of the front bumper reinforcement 20 and constitutes a substantially vertical surface, a structural member or the like of the opponent vehicle enters the vehicle body front portion 10 when a frontal collision occurs. Can be suppressed.

  In summary, according to the vehicle body front structure according to the present embodiment, the cabin 15 not only suppresses the intrusion of the structural member of the opponent vehicle at the time of the frontal collision, but also efficiently absorbs the energy at the time of the frontal collision. Can be suppressed.

  Further, in the vehicle body front structure according to the present embodiment, the radiator 22 is used as a wall body, and the radiator 22 blocks the intrusion of a structural member or the like of the opponent vehicle at the time of a frontal collision, and from the radiator 22 to the lower member 38. Since the existing radiator support lower 34 is used for load transmission, it is possible to ensure the load transmission path by effectively utilizing the existing parts. As a result, according to the present embodiment, the intended purpose can be achieved at low cost.

  Furthermore, in the vehicle body front part structure according to the present embodiment, since a part of the sub-frame 40 is used as the rear member of the front-rear direction member, existing members can be used effectively. For this reason, the member length of the part (lower member 38) newly installed can be shortened. As a result, according to the present embodiment, the intended purpose can be achieved at low cost.

  In addition, in the vehicle body front structure according to the present embodiment, the interference structure portion 24 provided at the end 34A in the vehicle width direction of the radiator support lower 34 is set, and the interference structure portion 24 is connected to the radiator 22 in a side view. Since the upper part 24B extended to the vehicle upper side so as to overlap in the vertical direction of the vehicle is included, when the collision load F is input to the radiator 22, the radiator 22 interferes with the upper part 24B. The collision load f1 is transmitted from the radiator 22 to the upper portion 24B and is transmitted to the lower member 38 and the subframe 40. Therefore, it is possible to reliably transmit the input load to the radiator 22 to the lower member 38 and the subframe 40 which are front and rear members. As a result, according to this embodiment, the reliability with respect to energy absorption in the initial stage of frontal collision can be improved.

(Supplementary explanation of the embodiment)
In addition, in this embodiment mentioned above, although the thing of the hollow staircase shape was employ | adopted as the interference structure part 24, when a specific structural example is given, as shown to FIG. 2 (A), two board | plate materials ( As shown in FIG. 2 (B), an interference structure portion 54 formed by joining both ends of a front plate member 50 bent into a staircase shape and a rear plate member 52 bent into an L shape by welding or the like. In addition, the interference structure portion 56 or the like formed into a hollow integrated shape using a hydroform or the like can be used.

  Further, in the above-described embodiment, the interference structure 24 is integrally set at the end 34A of the radiator support lower 34 in the vehicle width direction. However, the present invention is not limited to this, and as shown in FIG. 3, only the lower member 38 side is provided. Alternatively, the interference structure 58 may be set.

  More specifically, in this embodiment, the end portion 34A of the radiator support lower 34 in the vehicle width direction is left as it is, and the front end portion of the lower member 38 is wrapped around the lower portion of the radiator 22 in the vehicle vertical direction. An interference structure 58 having a hollow rectangular cross section having a margin is set. In other words, the interference structure portion 58 of this embodiment has a configuration in which the interference structure portion 24 described above is divided into the front and the rear. In this case, the front portion of the existing radiator support lower 34 extends in the vehicle width direction. If it is equivalent to the end portion 34A, the interference structure portion is substantially aggregated and set only on the lower member 38 side. Note that it is preferable that both the end 34A in the vehicle width direction of the radiator support lower 34 and the interference structure 58 are reinforced. The interference structure 58 set at the front end of the lower member 38 is preferably suspended from the front end of the front side member 12 or spanned between the front ends of the left and right lower members 38.

  According to this configuration, all the parts and structures (that is, the interference structure portion 58) that are newly added to one newly installed part (that is, the lower member 38) are integrated. Therefore, the existing parts can be utilized to the maximum extent. As a result, according to the present embodiment, the intended purpose can be achieved at a minimum cost.

  Furthermore, in the present embodiment described above, the radiator 22 is used as the wall body. However, the present invention is not limited to this, and a panel-like member (structure) having a load receiving surface similar to the radiator 22 may be used.

  Moreover, in this embodiment mentioned above, the radiator support lower 34 was utilized from a viewpoint of utilizing an existing member, However, Not only this but the structure which sets the transverse member arrange | positioned by making the vehicle width direction into a longitudinal direction separately May be taken.

  Furthermore, in the above-described embodiment, the lower member 38 is disposed separately from the subframe 40 on the lower side of the front side member 12, but the present invention is not limited thereto, and a portion corresponding to the lower member is formed in advance in the subframe. If so, there is no need to newly install the lower member 38.

  Furthermore, in the present embodiment described above, the interference structure portion 24 is set at the end 34A in the vehicle width direction of the radiator support lower 34. However, the present invention is not limited thereto, By the load input to the wall body at the time of the collision, an interference structure portion in which the lower ends of both ends of the wall body in the vehicle width direction interfere with the front end portion of the front-rear direction member and the front-rear direction load is transmitted to the front-rear direction member I just need it. Therefore, the interference structure portion does not necessarily have to be a long member having the vehicle width direction as a longitudinal direction, and a (high-strength) bracket-like member directly attached to the lower end of the side portion of the radiator 22 is also possible. Alternatively, the radiator 22 itself may be provided with a high-rigidity interference portion that is extended (projected) in advance to the vehicle lower side and the vehicle width direction outer side. In that case, the lapping cost in the vehicle vertical direction is not required.

  Further, in the above-described embodiment shown in FIG. 1, the configuration in which the lower portion 24 </ b> A of the interference structure portion 24 and the front end portion of the lower member 38 are coupled is adopted, but not limited to this, as shown in FIG. In addition, there may be a configuration in which a gap 60 exists between the lower portion 24A of the interference structure portion 24 and the front end portion of the lower member 38.

  Similarly, in the embodiment shown in FIG. 3, the end 34 </ b> A in the vehicle width direction of the radiator support lower 34 and the interference structure 58 coupled to the front end of the lower member 38 are arranged in contact with each other. Not limited to this, as shown in FIG. 4B, a configuration in which a gap 60 exists between the two may be employed. Further, in the embodiment shown in FIG. 3, the interference structure portion 58 is manufactured separately from the lower member 38 and coupled to the front end portion of the lower member 38. As shown, the interference structure 58 and the lower member 38 may be integrated. Both

It is a side view which shows the whole structure of the vehicle body front part structure which concerns on this embodiment. (A), (B) is a longitudinal cross-sectional view which shows the structural example of an interference structure part. It is a side view corresponding to FIG. 1 which shows the whole structure of the vehicle body front part structure concerning another embodiment. (A) is sectional drawing of the part corresponded to the A line arrow part of FIG. 1 which shows embodiment which provided the clearance gap between the front-end part of a lower member, and an interference structure part in the structure shown by FIG. FIG. 3B is a cross-sectional view of a portion corresponding to the portion indicated by the arrow B in FIG. 3 showing an embodiment in which a gap is provided between the end of the radiator support lower in the vehicle width direction and the interference structure portion in the configuration shown in FIG. FIG. 4C is a cross-sectional view corresponding to FIG. 4B showing an embodiment in which the interference structure portion is integrated with the front end portion of the lower member in the embodiment shown in FIG. 4B.

Explanation of symbols

10 Car body front part 12 Front side member 12C Rear part (car body component)
18 Crash box (front side member)
20 Front bumper reinforcement 22 Radiator (wall)
24 Interference structure part 24B Upper part (extension part)
30 Radiator support 34 Radiator support lower 34A End 38 Lower member (front-rear direction member)
40 Subframe 54 Interference Structure 56 Interference Structure 58 Interference Structure

Claims (5)

A pair of left and right front side members arranged with the vehicle longitudinal direction as the longitudinal direction on both sides of the front part of the vehicle body;
A front bumper reinforcement arranged at the front end portion of the vehicle body with the vehicle width direction as a longitudinal direction and connecting the front end portions of a pair of left and right front side members;
A wall body that is arranged close to the vehicle rear side of the front bumper reinforcement and constitutes a substantially vertical surface, and a collision load is input at the time of a frontal collision,
A vehicle body front part structure including
A pair of left and right front-rear members disposed on the lower side of the front side member along the vehicle front-rear direction, the rear end side being coupled to the vehicle body constituting member;
Interference structure in which a load input to the wall body at the time of a frontal collision interferes with the lower end portions of the wall body in the vehicle width direction to the front end portion of the front-rear direction member and transmits the front-rear direction load to the front-rear direction member Set the part,
A vehicle body front structure characterized by that. The wall body is a radiator, and upon input of a load to the radiator, both ends of a radiator support lower disposed on the lower edge side of the radiator with the vehicle width direction as a longitudinal direction are directly or via a member of the longitudinal member. Interfere with the front edge,
The vehicle body front part structure according to claim 1. The front-rear direction member includes a rear member that forms a part of the subframe, and a front member that is disposed between the rear member and the wall body.
The vehicle body front part structure according to claim 1 or 2, wherein The interference structure portion is set at a front end portion of the front member.
The vehicle body front part structure according to claim 3. The interference structure portion is configured to include an extension portion that extends to the vehicle upper side so as to overlap the wall body in the vehicle vertical direction in a side view,
The vehicle body front part structure according to any one of claims 1 to 4, wherein the vehicle body front part structure is provided.

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