Front body structure

Abstract

The present invention aims to effectively transfer load input to the front frame while stabilizing the deformation. The front end portion (1a) of the front frame (1) expands in width toward the outside in the vehicle width direction and has: a flat upper wall (3) extending in the vehicle width direction; an inner wall (4) extending downward from the inner end of the upper wall (3); a first inclined wall (5) extending obliquely downward toward the outside from the lower end of the inner wall (4); and a flat lower wall (6) extending outward from the outer end of the first inclined wall (5). In addition, the front end portion (1a) has an outer wall (7) connecting the outer end edges of the upper wall (3) and the lower wall (6) in the vertical direction; and a reinforcing wall (9) extending vertically between the upper wall (3) and the lower wall (6) and dividing the cross section of the front end portion (1a) of the front frame (11) into two in the vehicle width direction. One cross section (d1) of the bisected front end portion (1a) includes the first inclined wall (5).

Description

Technical Field

[0001] The invention relates to a vehicle body front structure. Background Art

[0002] Conventionally, a side frame is disposed outside the front frame in the vehicle width direction. The side frame includes a wheel house upper member whose rear end is connected to the front pillar, and a wheel house lower member extending forward and downward to a position substantially the same as the front end of the front frame (for example, Patent Document 1). The wheel house lower member is provided so that the front end extends from the wheel house upper member via an upper bent portion and a lower bent portion to a position in the up-down direction and the front-rear direction of the front frame.

[0003] A reinforcing plate extending forward and backward across the upper bent portion is mounted inside the wheel house lower member. The reinforcing plate transfers the load input from the front of the vehicle to a bending point provided at a desired position in the front-rear direction of the front side frame.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 6546065 Summary of the invention

[0007] However, in such a conventional vehicle body front structure, the cross section of the protruding portion of the outer side of the front side frame cannot be effectively utilized. Therefore, there is still room for further improvement.

[0008] An object of the present invention is to provide a vehicle body front structure that can effectively transmit load input to a front side frame and stabilize deformation.

[0009] The front vehicle body structure of the present invention is characterized in that it has a front side frame extending in the front-to-rear direction of the vehicle, the front end portion of the front side frame is wider toward the outside in the vehicle width direction than the rear end portion of the front side frame, and has: a flat upper wall extending in the vehicle width direction; an inner wall extending downward from the inner end of the upper wall; a first inclined wall extending obliquely toward the outside and downward from the lower end of the inner wall; a flat lower wall extending toward the outside from the outer end of the first inclined wall; an outer wall connecting the outer end edges of the upper wall and the lower wall in the up-down direction; and a reinforcing wall extending up and down between the upper wall and the lower wall and dividing the cross-section of the front end portion of the front side frame into two in the vehicle width direction, one cross-section of the front end portion divided into two includes the first inclined wall.

[0010] Effects of the Invention

[0011] According to the present invention, there is provided a vehicle body front structure capable of effectively transmitting load input to the front side frame while stabilizing deformation conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a side view of the front side frame front end portion on the left side as viewed from the vicinity of the center in the vehicle width direction in the vehicle body front structure according to the embodiment of the present invention.

[0013] Figure 2 In the vehicle body front structure of the embodiment, Figure 1 The center shows the main view observed from direction II.

[0014] Figure 3 In the vehicle body front structure of the embodiment, along Figure 1 Cross-sectional view taken along line III-III.

[0015] Figure 4 In the vehicle body front structure of the embodiment, Figure 3 Cross-sectional view at the position of line IV-IV.

[0016] Figure 5 It is a left side view of the front side frame in the vehicle body front structure of the embodiment.

[0017] Figure 6 It is a side view in which the outer side member of the front side frame is omitted in the vehicle body front structure of the embodiment.

[0018] Figure 7 This is a perspective view in which the outer side member of the front side frame is omitted in the vehicle body front structure according to the embodiment.

[0019] Figure 8 In the vehicle body front structure of the embodiment, Figure 3 Cross-sectional view taken along line VIII-VIII.

[0020] Fig. 9 In the vehicle body front structure of the embodiment, Figure 8 Cross-sectional view at the position of line IX-IX.

[0021] Fig.10 It is a perspective view of the front end portion of the front side frame in the vehicle body front structure according to the embodiment, as viewed obliquely from below.

[0022] Fig.11 In the vehicle body front structure of the embodiment, Fig.10 Cross-sectional view at the position of line XI-XI.

[0023] Fig.12 In the vehicle body front structure of the embodiment, Figure 8 Cross-sectional view at the position of line XII-XII.

[0024] Description of Reference Numerals

[0025] 1Front side frame

[0026] 1a Front end

[0027] 3 on the wall

[0028] 4 Inner wall

[0029] 5First inclined wall

[0030] 6 lower wall

[0031] 9 Strengthen the wall DETAILED DESCRIPTION

[0032] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings as appropriate. The same reference numerals are used for the same components, and repeated descriptions are omitted. When describing directions, unless otherwise indicated, the description is basically based on the front and rear, left and right, or top and bottom directions as seen from the driver. In addition, "vehicle width direction" is synonymous with "left and right direction".

[0033] The configuration of the vehicle body front structure according to the present embodiment will be described.

[0034] like Figure 1 As shown, a power room E is formed at the front of the vehicle to accommodate a power source such as an engine or a motor (not shown). On both sides of the power room E, there is a pair of left and right front side frames 1 extending in the front-rear direction of the vehicle.

[0035] The left and right front side frames 1 and 1 have substantially bilaterally symmetrical shapes. Therefore, in the present embodiment, the left front side frame 1 is mainly described, and the description of the right front side frame 1 is omitted.

[0036] A bumper joint plate 14 (see FIG. 1 ) on which the bumper is mounted is fixed to the front end portion 1 a of the front side frame 1 . Figure 2 The bumper joint plate 14 includes a front end portion 2a and a front end portion 1a extending from the lower member 2 to the front and downward direction. The front end portion 2a and the front end portion 1a are aligned and fixed in the vehicle width direction.

[0037] like Figure 3 As shown, the front end portion 1 a is wider toward the outside in the vehicle width direction than the rear end portion 1 b of the front side frame 1 .

[0038] The front end portion 1a has a flat upper wall 3 extending in the vehicle width direction, and an inner wall 4 extending downward from the inner end of the upper wall 3. In addition, the front end portion 1a has a first inclined wall 5 extending obliquely downward outward from the lower end of the inner wall 4, and a flat lower wall 6 extending outward from the outer end of the first inclined wall 5. Furthermore, between the upper wall 3 and the inner wall 4 of the front side frame 1, a second inclined wall 10 extending obliquely downward from the inner end of the upper wall 3 toward the upper end of the inner wall 4 is formed.

[0039] The front end portion 1a includes an outer wall 7 that connects the outer edges of the upper wall 3 and the lower wall 6 in the vertical direction, and a reinforcing wall 9. The reinforcing wall 9 is in the shape of a flat plate and extends vertically between the upper wall 3 and the lower wall 6, and the front end 9a of the upper side is joined to the side edge of the upper wall 3, and the front end 9a of the lower side is joined to the lower edge of the outer wall 7. The front end portion 1a of the front side frame 1 is divided into two sections d1 and d2 in the vehicle width direction by the reinforcing wall 9. One section d1 of the bisected front end portion 1a includes the first inclined wall 5.

[0040] Moreover, if Figure 4 As shown, the inner member 1e on the rear end 1b side of the front side frame 1 is formed in a hat cross-sectional shape. In addition, the outer member 1f is formed in a flat plate shape. The inner member 1e and the outer member 1f are joined in the vehicle width direction via joining flanges 1g, 1g formed on the side edges of the inner member 1e to form a hollow, substantially rectangular closed cross-sectional shape.

[0041] like Figure 5 As shown, the front side frame 1 has first to third bending points 11 to 13 which serve as trigger points for bending the front side frame 1 in the horizontal direction in the event of a collision.

[0042] In addition, the first to third bending points 11 to 13 are provided in this order from the front side of the front frame 1 to be separated from each other in the front-to-back direction. In addition, the first bending point 11 and the third bending point 13 are concave bending portions provided on the side surface of the front frame 1 outside the vehicle width, and the second bending point 12 is a concave bending portion provided on the side surface of the front frame 1 inside the vehicle width. Figure 6 , 7 As shown in FIG. 8 , in the front side frame 1 of the present embodiment, the front end 9a side of the reinforcing wall 9 extends parallel to the outer wall 7. The rear end 9b of the reinforcing wall 9 is inclined so as to become more inward toward the rear. Furthermore, the rear end 9b is connected to the inner wall 4 near the first bending point 11.

[0043] like Figure 7 As shown, a reinforcing member 15 is mounted on the inner wall 4. The reinforcing member 15 has a U-shaped cross-section and is extended in the front-rear direction behind the reinforcing wall 9. In addition, a partition plate 17 is arranged between the inner wall 4 and the reinforcing wall 9 to clamp a flange nut 16 of an engine frame or a transmission frame, etc. In addition, the inner wall 4 or the reinforcing wall 9 supports an engine or a transmission (not shown) via the flange nut 16.

[0044] In addition, if Figure 1 , Figure 7 As shown, the front end portion 1a is formed in a trumpet shape that expands in the vertical direction toward the front.

[0045] Moreover, if Figure 8As shown, the front end portion 1a is formed into a trumpet shape that expands toward the outside in the vehicle width direction as it approaches the front (see Figure 3 ).

[0046] The lower member 2 extending rearward on the upper outer side is connected to the front side frame 1 of the present embodiment via a bumper joint plate 14 .

[0047] A V-shaped space 40 is formed between a front end portion 2 a of the lower member 2 that is bent inward in the vehicle width direction and a front end portion 1 a of the front side frame 1 .

[0048] In addition, if Fig. 9 As shown, a joint member 50 is provided in the V-shaped space 40 to join and seal the front end portion 2 a and the front end portion 1 a .

[0049] The joint member 50 includes a first joint member 51 (see FIG. 1 ) which is joined to the front end portion 1 a of the front side frame 1 and the lower portion of the front end portion 2 a of the lower member 2. Fig.10 ). In addition, the joint member 50 includes a second joint member 52 (see Fig. 9 ).

[0050] Among them, Fig.10 As shown, the first joint member 51 includes a joint panel 51a and a side curved flange 51b. The joint panel 51a has a side edge in a U-shape when viewed from the side, and is joined to the lower surface of the front end portion 2a of the lower member 2. In addition, a side curved flange 51b is formed around the joint panel 51a. And, it is joined to the protruding outer surface 1c of the front end portion 1a of the front side frame 1 via the side curved flange 51b.

[0051] Moreover, if Fig. 9 As shown, the second joint member 52 is provided with a plate-shaped main body 52a and a joint flange 52b. The joint flange 52b is formed in a vertical wall shape at the periphery of the substantially square main body 52a. The joint flange 52b is joined to the outer wall 7 portion of the front end 1a of the front side frame 1 that protrudes outward, the upper wall 3 of the front end 1a, the front end 2a of the inner member 2e of the lower member 2, and the rear surface of the bumper joint plate 14.

[0052] In addition, if Fig.11 As shown, the inner member 2e of the lower member 2 is formed into a crank cross-sectional shape. In addition, the outer member 2f is formed into an L-shape. The inner member 2e and the outer member 2f are joined in the vehicle width direction via joining flanges 2g, 2g formed on the side edges of the inner member 2e to form a hollow, substantially rectangular closed cross-section.

[0053] Next, the effects of the vehicle body front structure of the present embodiment will be described.

[0054] like Figure 1 As shown in FIG. 1 , the vehicle body front structure of this embodiment has a front side frame 1 extending in the front-rear direction of the vehicle. Figure 3 As shown, the front end portion 1 a of the front side frame 1 is wider toward the outside in the vehicle width direction than the rear end portion 1 b of the front side frame 1 .

[0055] The front end portion 2a has: a flat upper wall 3 extending in the vehicle width direction; an inner wall 4 extending downward from the inner end of the upper wall 3; a first inclined wall 5 extending obliquely downward outward from the lower end of the inner wall 4; and a flat lower wall 6 extending outward from the outer end of the first inclined wall 5.

[0056] The front end portion 1a has an outer wall 7 that vertically connects the outer edges of the upper wall 3 and the lower wall 6, and a reinforcing wall 9 that vertically extends between the upper wall 3 and the lower wall 6 and divides the cross section of the front end portion 1a of the front side frame 1 into two in the vehicle width direction. One cross section of the bisected front end portion 1a includes the first inclined wall 5.

[0057] The vehicle body front structure of the present embodiment configured in this manner can effectively transmit load input to the front side frame 1 while stabilizing deformation.

[0058] Specifically, Figure 3 As shown, the cross section of the front end portion 1 a of the front side frame 1 is divided into two sections d1 including the first inclined wall 5 and d2 excluding the first inclined wall 5 by the reinforcing wall 9 extending vertically between the upper wall 3 and the lower wall 6 .

[0059] Therefore, the front side frame 1 forms a double cross section d1 and a double cross section d2 in the deformation direction with respect to the load input from the outer side in the vehicle width direction. This can improve the strength and rigidity of the front end portion 1a.

[0060] Even if the cross section of the front side frame 1 is large, the cross section can be divided into the cross section d1 and the cross section d2 by the first inclined wall 5. Therefore, the cross section collapse is suppressed. Moreover, the rigidity can be further increased by the cross section d1 including the first inclined wall 5, so that the deformation state of the front side frame 1 can be stabilized.

[0061] In addition, if Figure 3 As shown, a second inclined wall 10 is formed between the upper wall 3 and the inner wall 4 and extends obliquely downward from the inner end of the upper wall 3 toward the upper end of the inner wall 4 .

[0062] In this way, the second inclined wall 10 is formed to be inclined between the upper wall 3 and the inner wall 4 , and thus the cross-sectional shape formed inside the front end portion 1 a of the front side frame 1 can be reduced.

[0063] Therefore, the number of ridge lines r1 to r4 between adjacent walls is increased in the front side frame 1 formed with the first inclined wall 5 and the second inclined wall 10. Therefore, the strength and rigidity with respect to the load input in the vehicle front-rear direction can be improved.

[0064] For example, the first inclined wall 5 and the second inclined wall 10 may be formed into a triangular shape when viewed from the side to change the cross-sectional shape. In addition, grooves in the front-rear direction or belt-shaped protrusions may be provided on the upper wall 3, the inner wall 4, the lower wall 6, and the outer wall 7 instead of or together with the ridge lines r1 to r4, thereby increasing the number of ridge lines.

[0065] Moreover, if Figure 5 As shown, the front side frame 1 has first to third bending points 11 to 13 which become trigger points for bending the front side frame 1 in the horizontal direction in the event of a collision. Figure 3 As shown, the front end portion 9 a side of the reinforcement wall 9 extends parallel to the outer wall 7 and is connected to the rear surface of the bumper joint plate 14 in the vehicle front-rear direction.

[0066] The reinforcing wall 9 is inclined so as to become more inward as it goes toward the rear. Figure 6 As shown, in the vicinity of the first bending point 11, the rear end portion 9b side is connected to the inner wall 4 in the vehicle width direction.

[0067] Therefore, the load input to the front end portion 1a of the front side frame 1 is transmitted to the inner wall 4 near the first to third bending points 11 to 13 at the rear through the reinforcing wall 9 and the outer wall 7. Therefore, the inner wall 4 and the outer wall 7 of the front side frame 1 can be easily bent at the first to third bending points 11 to 13. In this way, the front side frame 1 can be reliably bent at the first to third bending points 11 to 13, and the bending state can be stabilized. Therefore, it is possible to have good impact energy absorption.

[0068] In addition, if Figure 5 As shown, the front side frame 1 of this embodiment has at least three points in the front-rear direction, namely, the first to third bending points 11 to 13. Therefore, the front side frame 1 can bend at three horizontal points by the load input to absorb the impact absorption energy.

[0069] Moreover, if Figure 6 As shown, a reinforcing member 15 having a U-shaped cross section is attached to the inner wall 4. The reinforcing member 15 is provided to extend in the front-rear direction behind the reinforcing wall 9.

[0070] Therefore, the reinforcing member 15 formed into a U-shaped cross-section has high rigidity and can be lightweight due to miniaturization. In addition, the reinforcing member 15 is extended in the front-rear direction in a manner spanning the bending point. Therefore, the load input can be concentrated on the desired bending point.

[0071] And, if Figure 7 As shown, a spacer 17 for supporting a flange nut 16 of an engine mount is arranged between the inner wall 4 and the reinforcement wall 9 .

[0072] The cross-sectional shape in the front side frame 1 supporting the flange nut 16 can be enhanced in rigidity by the reinforcing wall 9 and the bulkhead 17. Therefore, by arranging the bulkhead 17 between the inner wall 4 and the reinforcing wall 9, the support rigidity of the engine can be further enhanced.

[0073] In addition, if Figure 7 As shown, the reinforcing wall 9 can support the flange nut 16 of the gearbox frame together with the engine frame, or instead of the engine frame. Figure 6 As shown, the partition plate 17 may also be clamped between the inner wall 4 and the reinforcing wall 9 and joined.

[0074] The front side frame 1 has its cross-sectional rigidity enhanced by the reinforcing wall 9. This can further enhance the support rigidity.

[0075] Moreover, if Figure 7 As shown, the front end portion 1a is formed in a trumpet shape that expands in the vertical direction toward the front.

[0076] The front end portion 1 a of the front side frame 1 is formed to expand in a trumpet shape, so that the load input due to the vertical offset collision caused by the SOT (Small Overlap) collision or the like can be smoothly transmitted to the closed cross section of the front side frame 1 .

[0077] And, if Figure 8 As shown, the front end portion 1a is formed into a trumpet shape that expands toward the outside in the vehicle width direction as it approaches the front (see Figure 3 ).

[0078] The front end portion 1a of the front side frame 1 is formed to expand in a trumpet shape. Therefore, the load input due to the vertical offset collision caused by the SOT collision can be smoothly transmitted to the closed cross section of the front side frame 1. As a result, the load input can be concentrated toward the first to third bending points 11 to 13 of the front side frame 1. Therefore, the bending can be smoothed and the bending state can be stabilized, and the absorption of impact energy can be improved.

[0079] In addition, if Fig.12 As shown, there is a lower member 2 extending forward on the outer side of the front side frame 1, and a V-shaped space 40 is formed between the top end portion 21 of the lower member 2 bent toward the inside in the vehicle width direction and the front end portion 1a of the front side frame 1 when viewed from above, and a first connecting component 51 is installed in the V-shaped space 40 to connect and close the top end portion 21 and the front end portion 1a.

[0080] Therefore, the load input F1 from the front of the vehicle can be dispersed into the component force F2 to the front side frame 1 and the component force F3 to the down member 2 via the first joint member 51. Therefore, the plate thickness of the front side frame 1 can be reduced to reduce the weight.

[0081] Moreover, if Fig.10 As shown, the first joint member 51 has a joint panel 51a in a U-shape when viewed from the side, which is joined to the lower surface of the front end portion 2a of the lower member 2 and to the protruding outer surface 1c of the front end portion 1a of the front side frame 1 via a lateral curved flange 51b.

[0082] Therefore, the load input from the front of the vehicle is dispersed to the lower surface of the front end portion 2 a of the lower member 2 and the outer surface 1 c of the front end portion 1 a of the front side frame 1 via the side curved flange 51 b .

[0083] Therefore, even if a large load is input, it can be applied to the front side frame 1 as a rigid member via the outer surface 1 c protruding from the front end portion 1 a of the front side frame 1 .

[0084] In addition, if Figure 3 As shown, the front side frame 1 and the lower member 2 have a first joint member 51 for joining the front end lower part, and a second joint member 52 for joining the front side frame 1 and the lower member 2 (see Fig. 9 ).

[0085] like Fig.12 As shown, the front end portion 2a of the lower member 2 and the front end portion 1a of the front side frame 1 are joined in the vertical direction by the two joining members, the first joining member 51 and the second joining member 52. Therefore, the joining strength between the lower member 2 and the front side frame 1 is improved. Fig.10 As shown, by joining the lower member 2 in an upwardly inclined state with respect to the front side frame 1 which is horizontal when viewed from the side, V-shaped dispersion of the load input is also easily achieved.

[0086] Moreover, if Fig.12 As shown, the second joint member 52 joins the protruding portion of the front end portion 1 a of the front side frame 1 , the upper wall 3 , the outer wall 7 , and the inner wall 2 b of the lower member 2 .

[0087] In the vehicle body front structure of this embodiment, the second joint member 52 bears a part of the upper wall 3 of the protruding portion of the front end portion 1a of the front side frame 1. Therefore, it is possible to achieve a practical beneficial effect that no additional parts are required to constitute the upper wall 3 and weight reduction can be achieved.

[0088] As mentioned above, if Figure 3As shown, the vehicle body front structure of this embodiment has a front end portion 1a of the front side frame 1 with a widened width and has a reinforcing wall 9 divided into two sections d1 and d2 in the vehicle width direction. Therefore, the following practical beneficial effects can be achieved: the load input applied to the key point (pinpoint) due to the vertical offset collision caused by the SOT collision is received by a wide area, and the load is effectively transmitted to the closed section of the front side frame 1 smoothly, while the deformation state is stabilized.

[0089] The present invention is not limited to the above-mentioned embodiments, and various modifications are possible. The above-mentioned embodiments are examples given to explain the present invention in an easy-to-understand manner, and do not necessarily have all the described structures. In addition, a part of the structure of a certain embodiment can be replaced with the structure of other embodiments, and in addition, the structure of other embodiments can be added to the structure of a certain embodiment. In addition, it is also possible to delete a part of the structure of each embodiment, or to add or replace other structures. The modifications that can be made to the above-mentioned embodiments are, for example, as follows.

[0090] In this embodiment, it is configured as follows: Figure 3 As shown, a section d1 includes the first inclined wall 5. However, this is not limiting, and the section d1 may include a plurality of other inclined walls including the second inclined wall 10. That is, the number, shape, and combination of the inclined walls included in a section d1 are not particularly limited.

[0091] In addition, in this embodiment, if Figure 6 as well as Figure 7 The example of connecting the partition plate 17 to the outer wall 7 and the reinforcing wall 9 is shown, but it is not limited to this. For example, it is also possible to clamp the flange nut 16 directly between the outer wall 7 and the reinforcing wall 9 to support the engine or transmission from below without providing the partition plate 17.

Claims

1. A vehicle body front structure, characterized in that: have: A front side frame extending along the front-rear direction of the vehicle; and A lower member extending forward on the outer side of the front frame, The lower member has a front end portion extending from the lower member to the front and downward side. The front end portion of the front side frame is wider toward the outside in the vehicle width direction than the rear end portion of the front side frame, and the front side frame has: a flat upper wall extending in the vehicle width direction; an inner wall extending downward from the inner end of the upper wall; a flat lower wall extending outward from the outer end of the inner wall; An outer wall connecting the outer end edges of the upper wall and the lower wall in the up-down direction; and a reinforcing wall extending up and down between the upper wall and the lower wall and dividing the cross section of the front end portion of the front side frame into two in the vehicle width direction, The lower member forms a V-shaped space between a front end portion bent toward the inner side in the vehicle width direction and a front end portion of the front side frame when viewed from above. A joint member is provided in the V-shaped space to join and seal the front end of the lower member and the front end of the front side frame. The joining member includes two plate-shaped first joining members and a second joining member. The first joint member joins the lower portion of the front end portion of the front side frame and the lower portion of the front end portion of the lower member. The second joint member joins an upper portion of a front end portion of the front side frame and an upper portion of a front end portion of the lower member.

2. The vehicle body front structure according to claim 1, characterized in that: The front end portion of the front side frame has a first inclined wall extending obliquely downward from the lower end of the inner wall toward the outside, and a cross section of the front end portion of the front side frame divided into two includes the first inclined wall. A second inclined wall is formed between the upper wall and the inner wall and extends obliquely downward from the inner end of the upper wall toward the upper end of the inner wall.

3. The vehicle body front structure according to claim 1, characterized in that: The front side frame has a bending point which becomes a trigger point for bending the front side frame in a horizontal direction when a collision occurs. The front end side of the reinforcing wall extends parallel to the outer wall, The rear end side of the reinforcing wall is inclined so as to become more inward as it goes rearward, and is connected to the inner wall in the vicinity of the bending point.

4. The vehicle body front structure according to claim 1, characterized in that: A reinforcing member having a U-shaped cross section is installed on the inner wall. The reinforcing member is provided to extend in the front-rear direction rearwardly of the reinforcing wall.

5. The vehicle body front structure according to claim 4, characterized in that: The front side frame has a bending point which becomes a trigger point for bending the front side frame in a horizontal direction when a collision occurs. The reinforcing member is extended to straddle the bending point.

6. The vehicle body front structure according to claim 1, characterized in that: A bulkhead supporting an engine frame is disposed between the inner wall and the reinforcement wall.

7. The vehicle body front structure according to claim 1, characterized in that: The reinforcement wall supports the gearbox frame.

8. The vehicle body front structure according to claim 1, characterized in that: The front end portion of the front side frame is formed in a trumpet shape that expands in the vertical direction toward the front.

9. The vehicle body front structure according to claim 1, characterized in that: The front end portion of the front side frame is formed in a trumpet shape that expands outward in the vehicle width direction as it goes forward.

10. The vehicle body front structure according to claim 1, characterized in that: The second joint member joins the protruding portion of the front end portion of the front side frame, the upper wall, the outer wall, and the inner wall of the lower member.

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