Vehicle body structure

The vehicle body structure enhances the durability and rigidity of suspension towers by using upright wall portions and reinforcing members to improve the joinability of suspension towers to side members, addressing issues of deformation and stress concentration.

WO2025224944A1PCT designated stage Publication Date: 2025-10-30MITSUBISHI MOTORS CORP
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Patent Information

Application Number
PCT/JP2024/016312
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-04-25
Publication Date
2025-10-30

AI Technical Summary

Technical Problem

Existing vehicle body structures face issues with the durability, rigidity, and joinability of suspension towers to side members due to insufficient reinforcement, leading to potential deformation or separation at the connection points.

Method used

A vehicle body structure design featuring a suspension tower joined to a side member via a pair of legs with plate-shaped upright wall portions extending in the vertical direction, incorporating reinforcing members along the side and underside of the side member to enhance durability and rigidity, and ensuring smooth force transfer.

Benefits of technology

The design improves the durability and rigidity of the suspension tower's attachment to the side member, reduces stress concentration, and allows for easier deformation management during collisions, while potentially reducing weight and simplifying reinforcement design.

✦ Generated by Eureka AI based on patent content.

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Abstract

This vehicle body structure includes: a side member 12 extending in a vehicle longitudinal direction; and a suspension tower 30 joined to a side surface 12b of the side member 12 by a pair of leg parts 30L formed at an interval from each other in the vehicle longitudinal direction, and supporting a top part of a shock absorber. The pair of leg parts 30L includes plate-shaped standing wall parts 30W erected in a direction crossing the side surface 12b of the side member 12 and extending in a vehicle vertical direction along the side surface 12b. The standing wall part 30W includes a reinforcement member 60 (reinforcement part) extending downward, provided to extend in a vehicle width direction along the side surface 12b of the side member 12, and joined to a lower surface 12c in a state of being erected in a direction crossing the lower surface 12c.
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Description

Body structure

[0001] The present invention relates to a vehicle body structure having a suspension tower joined to a side surface of a side member.

[0002] Conventionally, there are known technologies relating to vehicle body structures including suspension towers joined to the sides of side members. For example, Patent Document 1 (JP-A-2005-102626) describes a structure in which front and rear legs are provided at the bottom of a suspension tower and attached to a main frame. In this suspension tower structure, reinforcing members are attached to the lower ends of the front and rear legs of an outer panel (spring house) of the suspension tower, and the reinforcing members are attached to the underside of the main frame (side member).

[0003] International Publication No. 2011 / 101905

[0004] The suspension tower connects the shock absorbers and upper arms of the suspension system, transmitting forces from the road surface to the tire. This force acts significantly on the attachment point of the suspension tower to the side member at the lower end. However, in the structure described in Patent Document 1, the reinforcing member provided at the lower end of the suspension tower is bent from the outer surface of the outer panel toward the underside of the side member and then attached to the underside of the side member. As a result, the reinforcing member cannot fully withstand the force, which could result in deformation or damage to the reinforcing member itself, or separation of the connection between the suspension tower and the side member via the reinforcing member. Therefore, sufficient durability, rigidity, and attachment strength of the suspension tower to the side member could not be ensured, requiring additional reinforcement.

[0005] The present invention was made in consideration of such problems, and its purpose is to provide a vehicle body structure that can better ensure the durability, rigidity, and joinability of the suspension tower to the side member.

[0006] In order to achieve the above-mentioned object, the vehicle body structure of the present invention comprises a side member extending in the longitudinal direction of the vehicle, and a suspension tower joined to the side of the side member by a pair of legs formed at a distance from each other in the longitudinal direction of the vehicle and supporting the top of a shock absorber, at least one of the pair of legs including a plate-shaped upright wall portion erected in a direction intersecting with the side of the side member and extending in the vertical direction of the vehicle along the side, and the upright wall portion extends downward and includes a reinforcing portion extending in the vehicle width direction along the underside of the side member and joined to the underside while erected in a direction intersecting with the underside.

[0007] According to the vehicle body structure of the present invention, it is possible to better ensure the durability, rigidity, and joinability of the suspension tower to the side member.

[0008] Fig. 1 is a perspective view of a vehicle body structure according to an embodiment, viewed from the outside in the vehicle width direction; Fig. 2 is an explanatory view of a suspension tower, viewed from the outside and below in the vehicle width direction; Fig. 3 is an explanatory view of the suspension tower, viewed from the outside in the vehicle width direction; Fig. 4 is an explanatory view of the vicinity of a lower end of the suspension tower, viewed from the outside and rear side in the vehicle width direction.

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the vehicle longitudinal direction, vehicle width direction, and vehicle vertical direction are defined based on a vehicle to which the vehicle body structure of the embodiment is applied.

[0010] (Vehicle body structure) Fig. 1 is a perspective view of a vehicle body structure according to an embodiment as seen from the outside in the vehicle width direction. The vehicle body structure 1 according to the embodiment is applied to the front wheel side (not shown) of a vehicle. As shown in Fig. 1, the vehicle body structure 1 includes a body frame 10 and a suspension device 20.

[0011] (Vehicle Body Frame) The vehicle body frame 10 includes a pair of side members 12 and a cross member 14. The pair of side members 12 extend in the vehicle longitudinal direction and are provided as a pair on the left and right sides spaced apart in the vehicle width direction. The side members 12 are hollow frames connecting an inner frame and an outer frame, and have an upper surface 12a, a side surface 12b on the outer side in the vehicle width direction, a lower surface 12c, and a side surface 12d on the inner side in the vehicle width direction. Plate-shaped reinforcements 15 (see dashed lines in FIG. 3 ) are attached inside the side members 12 near the suspension device 20 and spaced apart in the vehicle longitudinal direction. Multiple cross members 14 extend in the vehicle width direction and are connected to both of the pair of side members 12. The cross members 14 include two suspension cross members 14a arranged below the suspension device 20.

[0012] (Suspension Device) The suspension device 20 includes a lower arm 22, a knuckle 24, an upper arm 26, a shock absorber 28, and a suspension tower 30, and is provided in a pair on the left and right in the vehicle width direction corresponding to the front wheels (not shown). The lower arm 22 is connected to the ends of two suspension cross members 14a so as to be rotatable about an axis extending in the longitudinal direction of the vehicle. The knuckle 24 is connected to the outer end of the lower arm 22 in the transverse direction so as to be rotatable about an axis extending in the vertical direction of the vehicle. A hub 6 that supports the front wheels and to which a drive shaft is connected is rotatably attached to the knuckle 24. In addition, a steering rod 8 that operates in conjunction with the steering wheel operated by the driver is connected between the left and right knuckles 24.

[0013] The upper arm 26 is connected to the knuckle 24 so as to be rotatable about an axis extending in the vertical direction of the vehicle. The upper arm 26 branches into two branches from the connection with the knuckle 24 toward the inside in the vehicle width direction, and each end is connected to a suspension tower 30 so as to be rotatable (swingable in the vertical direction of the vehicle). The shock absorber 28 is a mechanism that absorbs vibrations from the front wheels in the vertical direction of the vehicle, and is connected to the lower arm 22 so as to be rotatable about an axis extending in the longitudinal direction of the vehicle. A top portion 28a of the shock absorber 28 is fixed to the suspension tower 30 by engagement. A coil spring (not shown) is wound around the shock absorber 28.

[0014] (Suspension Tower) Figure 2 is an explanatory diagram of the suspension tower 30 viewed from the outside and below in the vehicle width direction. Figure 3 is an explanatory diagram of the suspension tower 30 viewed from the outside in the vehicle width direction. Figure 4 is an explanatory diagram of the vicinity of the lower end of the suspension tower 30 viewed from the outside and rear in the vehicle width direction. The suspension tower 30 includes a spring house 32, an inner reinforcement 34, and an outer reinforcement 36 (reinforcement).

[0015] The spring house 32 has a ceiling portion 32A and side portions 32B extending downward from both ends of the ceiling portion 32A in the vehicle longitudinal direction, and is open on both sides in the vehicle width direction. The spring house 32 houses a coil spring in a space surrounded by the ceiling portion 32A and the side portions 32B. The ceiling portion 32A is provided with a mating hole 33C for mating with the top portion 28a of the shock absorber 28. The spring house 32 also has a pair of first leg portions 40 extending from the side portions 32B. The pair of first leg portions 40 are formed with a gap between them in the vehicle longitudinal direction and are joined by welding to the side surfaces 12b of the side members 12 on the outer sides in the vehicle width direction.

[0016] The inner reinforcement 34 is disposed so as to cover the side surface portion 32B of the spring house 32 from both sides in the vehicle longitudinal direction while closing the opening on the inner side in the vehicle width direction of the spring house 32. The inner reinforcement 34 is joined by welding to the side member 12 and the spring house 32. The inner reinforcement 34 is formed with an upper arm support portion 35 that rotatably supports the upper arm 26.

[0017] The outer reinforcement 36 is a gate-shaped member disposed inside the spring house 32 in the vehicle longitudinal direction (hereinafter referred to as the "inner side in the vehicle longitudinal direction") so as to cover a portion of the opening of the spring house 32 on the inner side in the vehicle width direction. The outer reinforcement 36 is joined by welding to each side surface portion 32B of the spring house 32 on both sides in the vehicle longitudinal direction. The outer reinforcement 36 also has a pair of second leg portions 50 formed at a distance from each other in the vehicle longitudinal direction. The pair of second leg portions 50 extend along the pair of first leg portions 40 of the spring house 32 and are joined by welding to the pair of first leg portions 40 and the side surfaces 12b of the side member 12. The pair of second leg portions 50, together with the pair of first leg portions 40, form a pair of legs 30L of the suspension tower 30.

[0018] The suspension tower 30 configured as described above transmits the force input from the road surface to the tire. As a result, a rotational moment M acts on the suspension tower 30, which acts toward the outside in the vehicle width direction at the lower end and toward the outside in the vehicle width direction at the upper end, as shown by the solid arrows in Figure 2. As a result, large stresses tend to occur at the attachment positions of the lower end of the suspension tower 30 (i.e., the pair of legs 30L) to the side members 12, requiring significant reinforcement around the pair of legs 30L.

[0019] (Pair of Legs) Therefore, in the vehicle body structure 1 of this embodiment, in addition to the above configuration, the pair of legs 30L are provided with reinforcing members 60 (reinforcing portions) in order to more efficiently ensure sufficient durability and rigidity of the suspension tower 30 and joinability with the side member 12. The structure of the pair of legs 30L including the reinforcing members 60 will be specifically described below.

[0020] (First Leg Portion) Each first leg portion 40 has a first standing wall portion 41 extending in a direction perpendicular to the side surface 12b of the side member 12 and a first abutment portion 42 (abutment portion) extending from the first standing wall portion 41 toward the outside of the spring house 32 in the vehicle longitudinal direction (hereinafter referred to as the "outside in the vehicle longitudinal direction"). The first standing wall portion 41 extends from the side surface portion 32B along the vehicle vertical direction to near the lower end of the side member 12. The first abutment portion 42 abuts parallel to the side surface 12b of the side member 12. A flange portion 42f protruding outward in the vehicle longitudinal direction is formed at the lower end of the first abutment portion 42. The first abutment portion 42 is joined by welding to the side surface 12b of the side member 12 at a joint portion 70 (see the thick line in Figures 3 and 4 ) along the outer edge in the vehicle longitudinal direction, including the flange portion 42f.

[0021] (Second Leg Portion) Each second leg portion 50 has a second standing wall portion 51 extending in a direction perpendicular to the side surface 12b of the side member 12 and a second abutment portion 52 extending inward in the vehicle longitudinal direction from the second standing wall portion 51. As shown in FIG. 4 , the second standing wall portion 51 extends in the vehicle vertical direction along the first standing wall portion 41 to a midpoint of the first standing wall portion 41 in the vehicle vertical direction. The second standing wall portion 51 abuts against an end surface 41a on the inner side in the vehicle longitudinal direction of the first standing wall portion 41 and is joined by welding to the end surface 41a at a joint portion 71 (see the thick line in FIGS. 3 and 4 ) along an edge portion on the side opposite the side member 12. In addition, a lower edge 511 of the second standing wall portion 51 is formed in a generally L-shape including an inclined portion 511a that extends upward from the lower side and in a direction away from the side surface 12b.

[0022] The second contact portion 52 abuts parallel to the side surface 12b of the side member 12 and is joined by welding to the side surface 12b at a joint 72 (see the bold line in FIGS. 3 and 4 ) along the edge opposite the first standing wall portion 41. The second contact portion 52 has an extension portion 52a in its inner half in the vehicle longitudinal direction that extends downward beyond the second standing wall portion 51, and the joint 72 is formed to at least a portion of the extension portion 52a. This allows the distance in the vehicle vertical direction between the joint 72 and a joint portion 73 (see the bold line in FIG. 4 ) of the reinforcing member 60 to the side member 12, which will be described later, to be as close as possible. In this embodiment, as shown in the area vertically surrounded by dashed lines in FIG. 4 , the joint portion 72 and the joint portion 73 overlap in the vehicle vertical direction (the joint portion 72 and the joint portion 73 partially overlap when viewed from the vehicle longitudinal direction).

[0023] (Reinforcing Member) The reinforcing member 60 is an L-shaped plate-like member provided on each of the pair of leg portions 30L and extending across the side surface 12b and the underside 12c of the side member 12. Similar to the first standing wall portion 41 and the second standing wall portion 51, the reinforcing member 60 extends in a direction perpendicular to the side surface 12b of the side member 12. The reinforcing member 60 is disposed below the second standing wall portion 51 at a distance from the spring house 32 on the inner side in the vehicle longitudinal direction, extends parallel to the second standing wall portion 51 along the vehicle vertical direction, and abuts against the end surface 41a of the first standing wall portion 41. In other words, the reinforcing member 60, together with the first standing wall portion 41 and the second standing wall portion 51, forms the standing wall portion 30W extending in a direction perpendicular to the side surface 12b of the leg portion 30L. The standing wall portion 30W is a plate-like portion that stands in a direction perpendicular to the side surface 12b of the side member 12 and extends in the vehicle up-down direction along the side surface 12b. The reinforcing member 60 is configured to include a portion that extends from the standing wall portion 30W below the side surface 12b of the side member 12 and extends in the vehicle width direction along the undersurface 12c, and stands in a direction perpendicular to the side surface 12b and the undersurface 12c.

[0024] An inner edge 61 of the reinforcing member 60 on the side member 12 side perpendicularly abuts against a side surface 12b of the side member 12, a corner 12e on the lower end side that extends while curving between the side surface 12b and the lower surface 12c, and the lower surface 12c. The reinforcing member 60 is joined by welding continuously from the side surface 12b to the lower surface 12c at a joint 73 along the inner edge 61.

[0025] Furthermore, an outer edge 62 of the reinforcing member 60 opposite the side surface 12b of the side member 12 extends at an incline away from the side member 12 as it moves from the lower side to the upper side. In other words, the reinforcing member 60 is formed so that its width W increases as it moves from the lower side to the upper side. The reinforcing member 60 is joined by welding to the end face 41a (face) of the first standing wall portion 41 at a joint 74 along this outer edge 62 in a state where it overlaps the end face 41a (face) of the first standing wall portion 41, and extends downward to the lower surface 12c. Therefore, the joint 74 extends at an incline away from the side member 12 as it moves from the lower side to the upper side.

[0026] Furthermore, the upper edge 63 of the reinforcing member 60 extends along the shape of the lower edge 511 of the second standing wall portion 51 while being spaced apart from the lower edge 511 in the vehicle up-down direction. The upper edge 63 includes an inclined portion 63a that extends upward from the lower side and away from the side surface 12b. As a result, as shown in FIG. 4 , the inclined portion 63a of the reinforcing member 60 and the inclined portion 511a of the second standing wall portion 51 overlap in the vehicle up-down direction (overlap when viewed in the vehicle width direction). This allows the end 63b of the upper edge 63 opposite the side member 12 to be positioned as high as possible, thereby ensuring the length of the joint 74. Furthermore, the distance in the vehicle up-down direction between the joint 71 and the joint 74 of the second standing wall portion 51 relative to the first standing wall portion 41 can be reduced.

[0027] Effect of the Embodiment As described above, the vehicle body structure 1 of the embodiment includes a side member 12 extending in the vehicle longitudinal direction, and a suspension tower 30 joined to the side surface 12b of the side member 12 by a pair of legs 30L formed at an interval from each other in the vehicle longitudinal direction, and supporting the top portion 28a of the shock absorber 28. The pair of legs 30L include plate-shaped upright wall portions 30W erected in a direction perpendicular to (intersecting with) the side surface 12b of the side member 12 and extending in the vehicle up-down direction along the side surface 12b, and the upright wall portions 30W extend downward and include a reinforcing member 60 (reinforcing portion) extended downward along the underside 12c of the side member 12 in the vehicle width direction and joined to the underside 12c in a state erected in a direction intersecting with the underside 12c.

[0028] With this configuration, compared to when the leg portion 30L is joined only to the side surface 12b or the underside 12c of the side member 12, the L-shaped reinforcing member 60 erected on the side surface 12b and the underside 12c of the side member 12 effectively receives the force transmitted to the suspension tower 30 and transmits it to the side member 12. As a result, durability and rigidity are improved near the lower end of the leg portion 30L. Furthermore, when the leg portion 30L (standing wall portion 30W) is joined only to the side surface 12b of the side member 12, a force is applied in the peeling direction at the joint with the side member 12 near the lower end, which tends to increase stress. In this embodiment, the reinforcing member 60 is joined to the underside 12c, and the joint 73 with the underside 12c extends along the vehicle width direction, which is the direction in which the force due to the rotational moment M is pulled. This more effectively suppresses stress concentration at the underside 12c due to a load in the peeling direction at the joint 73. Therefore, according to the vehicle body structure 1 of the embodiment, it is possible to better ensure the durability, rigidity, and joinability of the suspension tower 30 to the side member 12.

[0029] Furthermore, since the reinforcing member 60 is joined to the lower surface 12c while abutting against the side surface 12b and the lower surface 12c of the side member 12, the vicinity of the lower end of the side member 12, which is relatively prone to deformation, can be suppressed by the reinforcing member 60. Therefore, it is possible to suppress deformation of the side member 12 as well.

[0030] In addition, by improving the durability of the suspension tower 30 and the side member 12 in the vicinity thereof, the reinforcement 15 provided inside the side member 12 can be made as simple in shape as possible. In this embodiment, the reinforcement 15 is a plate-shaped member as described above. This improves the ease of deformation of the vehicle body structure 1 during a vehicle frontal collision and ensures a longer crushable zone compared to when a larger, more rigid reinforcement is provided near the suspension tower 30. Furthermore, this also makes it easier to adjust the deformation of the vehicle body structure 1 during a vehicle frontal collision, eliminating the need to provide a separate reinforcement behind the suspension cross member 14a for the purpose of adjustment. This also contributes to reducing the weight of the vehicle body structure 1.

[0031] Furthermore, the reinforcing member 60 extends along the outer peripheral surface of the side member 12 from the side surface 12b to the undersurface 12c of the side member 12, and is joined continuously from the side surface 12b to the undersurface 12c. This configuration ensures the continuity of the joint 73 from the side surface 12b to the undersurface 12c, and can better suppress stress concentration due to a load in the peeling direction of the joint 73.

[0032] Furthermore, the reinforcing member 60 has an inner edge 61 facing the side member 12 joined to the side surface 12b and the underside 12c of the side member 12, and an outer edge extending opposite the side member 12 and facing the inner edge 61 joined to the standing wall portion 30W. With this configuration, even if the reinforcing member 60 is a separate member from the standing wall portion 30W, the reinforcing member 60 can be joined to the side surface 12b and the underside 12c of the side member 12 at the inner edge 61. Therefore, stress concentration due to a load in the peeling direction of the joint 73 can be more effectively suppressed than, for example, when the reinforcing member 60 is joined only to the side surface 12b or only to the underside 12c.

[0033] Furthermore, the joint 74 between the reinforcing member 60 and the standing wall portion 30W extends at an angle from the lower side to the upper side, in a direction away from the side member 12. With this configuration, the extending direction of the joint 74 can be made closer to the direction in which it is pulled by the rotational moment M (see FIG. 2), and therefore stress concentration due to a load in the peeling direction of the joint 74 can be more effectively suppressed.

[0034] The suspension tower 30 has a spring house 32 that supports the top 28a of the shock absorber 28, and an outer reinforcement 36 (reinforcement) joined to the inside of the spring house 32, the spring house 32 has a first leg portion 40 that forms the leg portion 30L, the outer reinforcement 36 has a second leg portion 50 that forms the leg portion 30L together with the first leg portion 40, and the standing wall portion 30W is formed on the first standing wall portion 40. The reinforcing member 60 has a wall portion 41 and a second upright wall portion 51 formed on a second leg portion 50 joined to the end face 41a of the first upright wall portion 41, and the reinforcing member 60 is arranged below the second upright wall portion 51, and the upper edge 63 of the reinforcing member 60 and the lower edge 511 of the second upright wall portion 51, which face each other, include inclined portions 63a, 511a that extend in a direction away from the side member 12 as they move from the lower side to the upper side, and the inclined portions 63a, 511a overlap in the vertical direction of the vehicle.

[0035] As described above, this configuration ensures the length of the joint 74 relative to the first standing wall portion 41 of the reinforcing member 60. Furthermore, the distance in the vehicle up-down direction between the joint 71 and the joint 74 relative to the first standing wall portion 41 of the second standing wall portion 51 can be shortened, thereby ensuring the continuity between the joint 71 and the joint 74 as much as possible and enabling smooth transfer of force. Therefore, stress concentration due to load in the peeling direction of the joints 71, 74 can be more effectively suppressed.

[0036] Furthermore, the joint 72 between the outer reinforcement 36 and the side member 12 overlaps the joint 73 between the reinforcing member 60 and the side member 12 in the vertical direction of the vehicle. This configuration ensures continuity between the joints 72 and 73 as much as possible, enabling smooth transfer of force. Therefore, stress concentration due to load in the peeling direction of the joints 72, 73 can be more effectively suppressed.

[0037] Furthermore, the leg portion 30L extends from the upright wall portion 30W toward the outside of the suspension tower 30 in the vehicle longitudinal direction (i.e., the outside of the spring house 32) and has a first abutment portion 42 (abutment portion) that abuts against the side surface 12b of the side member 12, and the reinforcing member 60 is disposed on the inside of the suspension tower 30 in the vehicle longitudinal direction (inside the spring house 32) with respect to the leg 30L. With this configuration, the reinforcing member 60 can be joined to the side surface 12b of the side member 12 while avoiding interference with the first abutment portion 42. Furthermore, by providing the first abutment portion 42 (particularly the flange portion 42f in the configuration of this embodiment) on the outside of the suspension tower 30, the rigidity and durability of the suspension tower 30 in the vehicle longitudinal direction can be increased.

[0038] Although the description of the embodiment has been completed, the aspects of the present invention are not limited to this embodiment. For example, the reinforcing member 60 may be provided on at least one of the pair of legs 30L.

[0039] Furthermore, the joints 73 between the reinforcing member 60 and the side surface 12b and the lower surface 12c of the side member 12 do not have to be entirely continuous. Furthermore, the joints 73 may be provided only between the reinforcing member 60 and the lower surface 12c.

[0040] Furthermore, the vertical wall portion 30W (first vertical wall portion 41, second vertical wall portion 51, reinforcing member 60) does not need to be completely perpendicular to the side surface 12b, as long as it can sufficiently ensure the durability, rigidity, and joinability to the side member 12 of the suspension tower 30, and it is sufficient if it extends in an intersecting direction.

[0041] Furthermore, the lower end of the first standing wall portion 41 or the lower end of the second standing wall portion 51 may be formed as an integral member with the reinforcing member 60. In other words, the lower end of the first standing wall portion 41 or the lower end of the second standing wall portion 51 may be extended in an L-shape and joined to the side surface 12 b and the lower surface 12 c of the side member 12.

[0042] In addition, the spring house 32 and the outer force 36 may be an integral member, and the first leg portion 40 and the second leg portion 50 may also be an integral member.

[0043] REFERENCE SIGNS LIST 1 vehicle body structure 10 vehicle body frame 12 side member 12b side surface 12c underside 20 suspension device 30 suspension tower 30L pair of legs 30W standing wall portion 60 reinforcing member 70, 71, 72, 73, 74 joint portion

Claims

1. A vehicle body structure comprising: a side member extending in the longitudinal direction of a vehicle; and a suspension tower joined to a side surface of said side member by a pair of legs formed at an interval from each other in the longitudinal direction of the vehicle and supporting the top of a shock absorber, wherein at least one of the pair of legs includes a plate-shaped upright wall portion erected in a direction intersecting with the side surface of said side member and extending in the vertical direction of the vehicle along said side surface, and said upright wall portion extends downward and in the vehicle width direction along the underside of said side member, and includes a reinforcing portion erected in a direction intersecting with said underside and joined to said underside.

2. A vehicle body structure according to claim 1, wherein the reinforcing portion extends along the outer peripheral surface of the side member from the side surface to the underside of the side member, and is joined continuously from the side surface to the underside.

3. A vehicle body structure as set forth in claim 1 or 2, wherein the reinforcing portion is composed of a plate-shaped reinforcing member that is joined to the face of the upright wall portion while overlapping it and extends downward, and the reinforcing member has an inner edge that faces the side member joined to the side surface and the underside of the side member, and an outer edge that extends opposite the inner edge on the side opposite the side member joined to the face of the upright wall portion.

4. A vehicle body structure according to claim 3, wherein the joint between the reinforcing member and the vertical wall portion extends in a direction away from the side member as it moves from the lower side to the upper side in the vehicle vertical direction.

5. The vehicle body structure described in claim 3, wherein the suspension tower has a spring house supporting the top of the shock absorber and a reinforcement joined to the inside of the spring house, the spring house has a first leg portion forming the leg portion, the reinforcement has a second leg portion forming the leg portion together with the first leg portion, the vertical wall portion has a first vertical wall portion formed on the first leg and a second vertical wall portion formed on the second leg and joined to the end face of the first vertical wall portion, the reinforcing member is arranged below the second vertical wall portion, the upper edge of the reinforcing member and the lower edge of the second vertical wall portion facing each other include inclined portions that extend in a direction away from the side member as they move from the lower side to the upper side, and the inclined portions overlap each other in the vertical direction of the vehicle.

6. A vehicle body structure according to claim 5, wherein the joint between the reinforcement and the side member overlaps the joint between the reinforcing member and the side member in the vehicle vertical direction.

7. A vehicle body structure as described in claim 3, wherein the leg portion extends from the vertical wall portion toward the outside of the suspension tower in the vehicle longitudinal direction and has an abutment portion that abuts against the side surface of the side member, and the reinforcing member is positioned inside the suspension tower in the vehicle longitudinal direction relative to the leg.

Citation Information

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