Body side structure

Abstract

To provide a vehicle body lateral structure making it possible to inhibit an increase in the number of components, and upgrade the supporting rigidity of an input part for a suspension load of a wheel house.SOLUTION: A vehicle body lateral structure includes a wheel house and damper base 13. The wheel house is disposed on a vehicle body flank so as to surround an upper periphery of a wheel and an inside in a vehicle width direction of the wheel. The damper base 13 is fixed to the internal surface of an upper area of the wheel house in order to support an upper part of a damper 12 of a suspension. A three-dimensionally curved part 18 that is curved in all of a lateral view, for-and-aft direction view, and vertical direction view, does not have a flexion point, and is upward convex is included in an upper area of the wheel house. The damper base 13 is fixed to the internal surface of the three-dimensionally curved part 18.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a vehicle body side structure including a wheel house. [Background technology]

[0002] A known body side structure for a four-wheeled vehicle has a wheelhouse that surrounds the upper outer periphery of the wheel and the inside in the vehicle width direction, and a damper base that supports the upper part of the suspension damper is attached to the inner surface of the upper region of the wheelhouse (see, for example, Patent Document 1).

[0003] The vehicle body side structure described in Patent Document 1 includes a wheelhouse inner having a substantially semi-cylindrical peripheral wall and a side wall covering the inner side of the peripheral wall in the vehicle width direction. The peripheral wall and side wall of the wheelhouse inner are integrally formed by press molding. A thick reinforcing bracket (absorber bracket) is fixed by welding to the inner surface of the upper region of the peripheral wall of the wheelhouse inner and to the outer surface of the side wall (the surface facing outward in the vehicle width direction). A damper base is fixed by welding to the lower surface of the upper wall of the reinforcing bracket fixed to the inner surface of the peripheral wall of the wheelhouse inner.

[0004] This vehicle body side structure has the upper region of the peripheral wall of the wheelhouse inner and the side wall reinforced with thick reinforcing members (reinforcing brackets), so that the suspension load input to the damper base when the vehicle is traveling can be stably supported by the high-rigidity part of the wheelhouse. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-20643 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the vehicle body side structure described in Patent Document 1 has a large, thick reinforcing member attached to the wheelhouse inner in order to increase the rigidity of the upper region of the peripheral wall of the wheelhouse inner and the side wall. Therefore, when this vehicle body side structure is adopted, the number of parts increases, which is likely to cause an increase in the vehicle weight and a decrease in the degree of freedom in the layout of parts inside the wheelhouse.

[0007] Therefore, the present invention aims to provide a vehicle body side structure that can increase the support rigidity of the input portion of the suspension load of the wheel house while suppressing an increase in the number of parts, and the present invention will ultimately contribute to energy efficiency. [Means for solving the problem]

[0008] In order to solve the above problems, the vehicle body side structure according to the present invention employs the following configuration. That is, the vehicle body side structure of the present invention comprises a wheel house (e.g., rear wheel house 10 in the embodiments) arranged on the side of the vehicle body so as to surround the upper outer periphery and the inside in the vehicle width direction of a wheel (e.g., rear wheel 11 in the embodiments), and a damper base (e.g., damper base 13 in the embodiments) fixed to the inner surface of the upper region of the wheel house (e.g., upper region 10u in the embodiments) and supporting the upper part of a suspension damper (e.g., damper 12 in the embodiments), wherein the upper region of the wheel house is provided with an upwardly convex three-dimensional curved surface portion (e.g., three-dimensional curved surface portion 18 in the embodiments) that is curved in all views from the side, the front-to-rear, and the up-down direction and has no inflection point, and the damper base is fixed to the inner surface of the three-dimensional curved surface portion.

[0009] With the above configuration, when a suspension load is input from the damper to the damper base, the load is received by the three-dimensional curved surface portion in the upper region of the wheelhouse. The three-dimensional curved surface portion is composed of a continuous upwardly convex curved surface that curves in multiple directions and has no inflection points, so the load input from the damper base can be distributed and received over the entire surface. As a result, the suspension load input through the damper base can be stably received without adding a large reinforcing member that spans from the upper region of the wheelhouse to the side region on the inner side in the vehicle width direction.

[0010] An inner region (for example, side wall portion 14s in the embodiment) that is connected to the inside of the upper region of the wheelhouse in the vehicle width direction may be provided with a three-dimensional curved surface (for example, three-dimensional curved surface 19 in the embodiment) that is connected to the three-dimensional curved surface portion, is curved in all views: side view, front-rear view, and up-down view, and does not have a convex inflection point on the inside of the vehicle width direction.

[0011] In this case, when a suspension load is input from the damper to the damper base, the load is received by the entire surface of the three-dimensional curved portion in the upper region of the wheelhouse, and also by the entire three-dimensional curved surface in the inner region of the wheelhouse. Therefore, when this configuration is adopted, the suspension load input to the damper base can be received uniformly over a wide range in the upper and inner regions of the wheelhouse.

[0012] A part of the inner region of the wheelhouse that is connected to the inside of the upper region in the vehicle width direction is provided with a step (e.g., step 40 in the embodiment) that is recessed toward the inside of the wheelhouse to avoid interference with interior vehicle components (e.g., rear seat 50 in the embodiment), and the three-dimensional curved portion to which the damper base is fixed may be formed in a position that does not overlap with the step in the fore-and-aft direction of the vehicle body.

[0013] In this case, even if it is necessary to provide a step in the inner area of ​​the wheelhouse to avoid interference with interior vehicle components, the three-dimensional curved portion to which the damper base is fixed is formed in a position that does not overlap with the step in the fore-and-aft direction of the vehicle body, so the three-dimensional curved portion can reliably provide a distributed support effect for the input load.

[0014] It is desirable that the damper base be fixed only to a single panel member that constitutes the three-dimensional curved surface portion of the wheelhouse.

[0015] In this case, since the damper base is not fixed across multiple members, the input load can be transmitted uniformly across the entire area of ​​the fixed portion of the damper base. Therefore, when this configuration is adopted, the suspension load input from the damper base can be supported uniformly across the entire area of ​​the three-dimensional curved surface portion. Furthermore, when the damper base is fixed to the three-dimensional curved portion of the wheelhouse by welding, there are no discontinuous parts such as steps in the welded portion, so the damper base can be easily welded to the three-dimensional curved portion.

[0016] The damper base may be fixed to the three-dimensional curved surface portion by non-penetrating laser welding.

[0017] In this case, distortion is less likely to occur in the three-dimensional curved surface portion when the damper base is fixed to the three-dimensional curved surface portion by welding. Therefore, when this configuration is adopted, the effect of distributing and supporting the input load by the three-dimensional curved surface portion can be more reliably obtained.

[0018] The curved surface of the three-dimensional curved surface portion is preferably formed by a catenary curved surface or a curved surface formed by combining a plurality of catenary curved surfaces.

[0019] In this case, the three-dimensional curved surface portion to which the damper base is fixed is composed of a catenary curved surface in which tension is balanced in all directions, or a curved surface that combines multiple catenary curved surfaces, so that the input suspension load is less likely to concentrate in one place in the upper region. Therefore, when this configuration is adopted, the suspension load input to the damper base can be efficiently distributed and supported over the entire area of ​​the three-dimensional curved surface portion of the wheelhouse. [Effects of the Invention]

[0020] The vehicle body side structure according to the present invention has an upper region of a wheelhouse that is provided with an upwardly convex three-dimensional curved surface portion that is curved in all three views: side view, front-rear view, and up-down view, and has no inflection points, and the damper base is fixed to the inner surface of the three-dimensional curved surface portion, thereby increasing the support rigidity of the wheelhouse's suspension load input portion while suppressing an increase in the number of parts. Therefore, when the vehicle body side structure according to the present invention is adopted, it is possible to reduce the weight of the area around the wheel house on the side of the vehicle body and increase the degree of freedom in the layout of parts within the wheel house. Furthermore, when the vehicle body side structure according to the present invention is adopted, it is possible to contribute to energy efficiency. Furthermore, the vehicle body side structure according to the present invention can absorb vibrations input through the damper base with a three-dimensional curved surface portion that is less likely to bend, thereby reducing vehicle vibrations. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 2 is an exploded perspective view of a wheel house portion at the left rear of the vehicle according to the embodiment. [Figure 2] FIG. 2 is a plan view of a wheel house portion at the left rear of the vehicle according to the embodiment. [Figure 3] FIG. 2 is a side view of a wheel house portion at the left rear of the vehicle according to the embodiment. [Figure 4] FIG. 2 is a rear view of a wheel house portion at the rear left side of the vehicle according to the embodiment. [Figure 5] 4 is a cross-sectional view taken along line VV in FIG. 3. [Figure 6] 6 is a perspective view of a wheel house portion at the left rear of the vehicle according to the embodiment, corresponding to the view taken along the arrow VI in FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the terms "front, back," "up, down," and "left" refer to directions relative to the forward direction of the vehicle unless otherwise specified. In addition, the drawings include an arrow FR pointing forward of the vehicle, an arrow UP pointing upward of the vehicle, and an arrow LH pointing to the left side of the vehicle.

[0023] Fig. 1 is an exploded perspective view of a rear wheel house 10 portion at the left rear of a vehicle 1 according to this embodiment. Fig. 2 is a plan view of the rear wheel house 10 portion, and Fig. 3 is a side view of the rear wheel house 10 portion as seen from the inside in the vehicle width direction. Fig. 4 is a rear view of the rear wheel house 10 portion as seen from the rear of the vehicle, and Fig. 5 is a cross-sectional view taken along line VV in Fig. 3. The rear wheel house 10 (wheel house) is arranged on the side of the vehicle body so as to surround the upper outer periphery and the inside in the vehicle width direction of the rear wheels 11 (wheels) of the vehicle 1. As shown in Fig. 5, the lower end portion on the inside in the vehicle width direction of the rear wheel house 10 is connected to a rear side frame 34 and a rear floor panel 35 at the rear of the vehicle. Although Figs. 1 to 5 show the rear wheel house 10 on the left side of the vehicle, the rear wheel house on the right side of the vehicle has a similar structure.

[0024] The rear wheel 11 is swingably supported by the vehicle body via a suspension arm (not shown). The suspension arm is located on the inside of the rear wheel 11 in the vehicle width direction. A spring (not shown) and a damper 12 (damping device) of the rear wheel suspension are interposed between the suspension arm and the vehicle body. The upper end of the damper 12 is supported on the upper region of the rear wheel house 10 via a damper base 13 made of a thick metal material. The damper base 13 is fixed to the inner surface of the upper region of the rear wheel house 10, as will be described in detail later.

[0025] As shown in Figures 1 and 5, the rear wheel house 10 includes a wheel house inner 14 that surrounds the upper outer periphery of the rear wheel 11 closer to the inside in the vehicle width direction and the inside of the rear wheel 11 in the vehicle width direction, a wheel house outer 15 that surrounds the upper outer periphery of the rear wheel 11 closer to the outside in the vehicle width direction, and a wheel house cover 16 that is fixed to the outer end of the wheel house outer 15 in the vehicle width direction.

[0026] The wheel well inner 14 has a substantially semi-cylindrical peripheral wall 14r that covers the upper outer periphery of the rear wheel 11 near the inner side in the vehicle width direction, a side wall 14s that is substantially semi-circular in side view and covers the inner side of the peripheral wall 14r in the vehicle width direction, and a joining flange 14f that extends radially outward from the outer end of the peripheral wall 14r in the vehicle width direction. The peripheral wall 14r, side wall 14s, and joining flange 14f are integrally formed by press molding from a metal plate. The peripheral wall 14r and side wall 14s are continuous by a smoothly curved surface.

[0027] The wheelhouse outer 15 has a substantially semi-cylindrical peripheral wall 15r that covers the upper outer periphery of the rear wheel 11 near the outer side in the vehicle width direction. The inner edge of the peripheral wall 15r in the vehicle width direction is overlapped from below with the outer edge of the peripheral wall 14r of the wheelhouse inner 14 in the vehicle width direction and is fixed to the peripheral wall 14r of the wheelhouse inner 14 by welding.

[0028] As shown in Figure 1, a notch 17 is formed at the outer end of the peripheral wall 15r of the wheelhouse outer 15 in the vehicle width direction. A wheelhouse cover 16 is welded to the edge of the notch 17. The wheelhouse cover 16 is formed from a metal plate made of a different material from that of the wheelhouse outer 15. The wheelhouse cover 16 has a substantially semi-cylindrical portion 16r that complements the notch 17 of the wheelhouse outer 15, and a substantially arc-shaped cover wall 16c that extends radially inward from the outer side of the substantially semi-cylindrical portion 16r in the vehicle width direction. 1 denotes a side sill end plate joined to the lower ends of the front edges of the wheelhouse inner 14 and the wheelhouse outer 15. The side sill end plate 39 is a plate member joined to the rear end of a side sill (not shown) located below the side of the vehicle interior.

[0029] As shown in Fig. 5, the lower edge of the body side panel inner 30i is welded to the joining flange 14f of the wheelhouse inner 14. The lower edge of the body side panel outer 30o is welded to the outer surface of the cover wall 16c of the wheelhouse cover 16. The body side panel inner 30i and the body side panel outer 30o are also welded to each other at their upper edges. The body side panel inner 30i and the body side panel outer 30o, together with the rear wheelhouse 10, form a closed cross section above the rear wheelhouse 10.

[0030] The areas near the center in the front-to-rear direction of peripheral wall portions 14r, 15r of the wheelhouse inner 14 and wheelhouse outer 15, which are welded together, form an upper region 10u of the rear wheelhouse 10 that bulges outward in an upwardly convex manner. This upper region 10u is provided with an upwardly convex three-dimensional curved surface portion 18 that is curved in all of the following views: side view (see FIG. 3), front-to-rear view (see FIG. 4), and up-down view (see FIG. 2), and that has no inflection points. The three-dimensional curved surface portion 18 of the upper region 10u is configured by a catenary curved surface or a curved surface that combines multiple catenary curved surfaces. Note that, in appropriate places in the drawings, auxiliary lines that follow the catenary curved surfaces are depicted, and the auxiliary lines are marked with the symbol Ca.

[0031] Furthermore, a part of the inner region (part of the side wall 14s of the wheel house inner 14) connected to the three-dimensional curved surface portion 18 of the upper region 10u of the rear wheel house 10 on the inner side in the vehicle width direction is formed with a three-dimensional curved surface 19 that is connected to the three-dimensional curved surface portion 18 of the upper region 10u, is curved in all of the side view (see FIG. 3), the front-rear view (see FIG. 4), and the up-down view (see FIG. 2), and that convex on the inner side in the vehicle width direction and has no inflection points. The three-dimensional curved surface 19 of the side wall 14s of the wheel house inner 14 is formed by a catenary curved surface or a curved surface that combines multiple catenary curved surfaces.

[0032] 2 and 3, a rear seat 50, which is an interior component of the vehicle, is installed in a position adjacent to the rear wheel house 10 (inner wheel house 14) at the rear of the vehicle interior. A step 40 is provided in a portion of the side wall 14s (inner region) of the inner wheel house 14 near the front end to avoid interference with the rear seat 50. The step 40 is gently recessed inward of the rear wheel house 10 (outward in the vehicle width direction) so as to follow the slope of the seat back 50b of the rear seat 50.

[0033] FIG. 6 is a perspective view of the vehicle 1 taken along the line VI in FIG. As shown in FIGS. 1, 5, and 6, the damper base 13 includes a fastening wall 13b having a generally elliptical shape in a plan view, to which the upper end of the damper 12 is fastened, and a weld flange 13f disposed to surround the outside of the fastening wall 13b. The weld flange 13f abuts against the inner surface of a three-dimensional curved surface portion 18 provided in the upper region 10u of the rear wheel house 10 and is welded to the three-dimensional curved surface portion 18 by non-penetration welding such as tailored blank welding. The upper surface of the weld flange 13f is formed into a curved shape that conforms to the abutting surface of the three-dimensional curved surface portion 18. The portion of the three-dimensional curved surface portion 18 to which the damper base 13 is welded is located on the inner surface of the peripheral wall portion 14r of the wheel house inner 14, offset toward the rear of the vehicle body relative to the stepped portion 40 of the side wall portion 14s. Therefore, the three-dimensional curved surface portion 18 to which the damper base 13 is fixed is formed in a position that does not overlap with the stepped portion 40 in the fore-and-aft direction of the vehicle body.

[0034] Furthermore, the weld flange 13f of the damper base 13 is welded and fixed only to the inner surface of the wheelhouse inner 14, and is not welded across to the wheelhouse outer 15. Therefore, the damper base 13 is fixed only to a single panel member that constitutes the upper region 10u of the rear wheelhouse 10.

[0035] As described above, the vehicle body side structure of this embodiment is provided with an upwardly convex three-dimensional curved surface portion 18 that is curved in all of the following ways: side view, front-rear view, and up-down view, and has no inflection points, in the upper region of rear wheel house 10, and damper base 13 is fixed to the inner surface of three-dimensional curved surface portion 18. Therefore, when a suspension load is input from damper 12 to damper base 13 while vehicle 1 is traveling, etc., the load is received by three-dimensional curved surface portion 18 in upper region 10u of rear wheel house 10.

[0036] Because the three-dimensional curved surface portion 18 of the rear wheel house 10 is made up of a continuous curved surface that is convex upward and has no inflection points that curve in multiple directions, the suspension load input from the damper base 13 can be distributed and received over the entire surface. Therefore, the vehicle body side structure of this embodiment can stably receive the suspension load input through the damper base 13 without adding a large reinforcing member that spans from the upper region 10u of the rear wheel house 10 to the side wall portion 14s on the inner side in the vehicle width direction. Therefore, the support rigidity of the suspension load input portion of the rear wheel house 10 can be increased while suppressing an increase in the number of parts. Therefore, when the vehicle body side structure of this embodiment is adopted, it is possible to reduce the weight of the area around the rear wheel house 10 on the side of the vehicle body and increase the degree of freedom in the layout of parts inside the rear wheel house 10. Furthermore, when the vehicle body side structure of this embodiment is adopted, it is possible to contribute to energy efficiency.

[0037] Furthermore, in the vehicle body side structure according to the present invention, the damper base 13 is fixed to the inner surface of the three-dimensional curved surface portion 18 provided in the upper region 10u of the rear wheel house 10, so that vibrations input through the damper base 13 can be absorbed by the three-dimensional curved surface portion 18, which is less likely to bend. Therefore, when this configuration is adopted, the generation of vibration noise in the rear wheel house 10 can be suppressed.

[0038] Furthermore, in the vehicle body side structure according to the present invention, a three-dimensional curved surface 19 is provided on side wall 14s (inner region) of rear wheel house 10, which is continuous with three-dimensional curved surface portion 18 of upper region 10u, is curved in all views: side, front-rear, and up-down, and has no convex inflection points on the inner side in the vehicle width direction. Therefore, when a suspension load is input from damper 12 to damper base 13, the load is received by the entire surface of three-dimensional curved surface portion 18 of upper region 10u of rear wheel house 10, and is also received by the entire area of ​​three-dimensional curved surface 19 of side wall 14s (inner region) of rear wheel house 10. Therefore, when this configuration is adopted, the suspension load input to the damper base 13 can be received uniformly over a wide range of the upper region 10u and the side wall portion 14s (inner region) of the rear wheel house 10. Therefore, by adopting this configuration, the support rigidity of the input portion of the suspension load of the rear wheel house 10 can be further increased.

[0039] Furthermore, in the vehicle body side structure according to the present invention, the three-dimensional curved surface portion 18 of the rear wheel house 10 to which the damper base 13 is fixed is formed in a position that does not overlap in the fore-and-aft direction of the vehicle body with the step portion 40 that is used to avoid interference with the rear seat 50. Therefore, even if it is necessary to provide the step portion 40 that is used to avoid interference with the rear seat 50 in part of the side wall portion 14s of the rear wheel house 10, the effect of the three-dimensional curved surface portion 18 in distributing and supporting the input load can be reliably obtained without being hindered by the step portion 40. Therefore, when this configuration is adopted, the degree of freedom in component layout in the vehicle can be increased.

[0040] Furthermore, in the vehicle body side structure according to the present invention, the damper base 13 is fixed only to the wheelhouse inner 14 (only to a single panel member) among the members that make up the three-dimensional curved surface portion 18 of the rear wheelhouse 10. In this case, the damper base 13 is not fixed across multiple members that make up the upper region 10u, so the input load can be transmitted uniformly and without variation across the entire area of ​​the fixing portion of the damper base 13. Therefore, when this configuration is adopted, the suspension load input from the damper base 13 can be supported more uniformly over the entire area of ​​the three-dimensional curved surface portion 18. Furthermore, when this configuration is adopted, when the damper base 13 is fixed to the three-dimensional curved surface portion 18 of the rear wheel house 10 by welding, there are no discontinuous portions such as steps in the welded portion, making it possible to easily weld the damper base 13 to the three-dimensional curved surface portion 18.

[0041] Furthermore, in the vehicle body side structure according to the present invention, the damper base 13 is fixed to the three-dimensional curved surface portion 18 of the rear wheel house 10 by non-penetrating laser welding. Therefore, distortion of the three-dimensional curved surface portion 18 is less likely to occur when the damper base 13 is fixed to the three-dimensional curved surface portion 18 by welding. Therefore, when this configuration is adopted, the effect of distributing and supporting the input load by the three-dimensional curved surface portion 18 can be obtained more reliably.

[0042] Furthermore, in the vehicle body side structure according to the present invention, the curved surface of the three-dimensional curved surface portion 18 of the rear wheel house 10 is configured as a catenary curved surface or a curved surface made up of a combination of multiple catenary curved surfaces. In this case, because the three-dimensional curved surface portion 18 to which the damper base 13 is fixed is configured as a catenary curved surface in which tension is balanced in all directions or a curved surface made up of a combination of multiple catenary curved surfaces, the input suspension load is less likely to concentrate in one spot in the upper region 10u of the rear wheel house 10. Therefore, when this configuration is adopted, the suspension load input to the damper base 13 can be efficiently distributed and supported over the entire area of ​​the three-dimensional curved surface portion 18 of the rear wheel house 10.

[0043] The present invention is not limited to the above-described embodiment, and various design modifications are possible without departing from the spirit and scope of the present invention. For example, in the above-described embodiment, the damper base 13 is fixed to the inner surface of the three-dimensional curved surface portion 18 of the rear wheel house 10 by non-penetration welding, but the manner in which the damper base 13 is fixed to the three-dimensional curved surface portion 18 is not limited to this. The damper base 13 may be fixed to the three-dimensional curved surface portion 18 by welding other than non-penetration welding. Furthermore, the damper base 13 may be fixed to the three-dimensional curved surface portion 18 by an industrial adhesive or the like.

[0044] Furthermore, in the above embodiment, the three-dimensional curved surface portion 18 is provided in the upper region 10u of the rear wheel house 10 at the rear of the vehicle, and the damper base 13 is fixed to the inner surface of the three-dimensional curved surface portion 18. However, a similar three-dimensional curved surface portion may be provided in the upper region of the front wheel house at the front of the vehicle, and the damper base may be fixed to the inner surface of the three-dimensional curved surface portion.

[0045] In the above embodiment, the damper base 13 is welded and fixed only to the wheelhouse inner member 14 among the members constituting the three-dimensional curved surface portion 18 of the upper region 10u of the rear wheelhouse 10. However, the damper base 13 can also be fixed so as to straddle the wheelhouse inner member 14 and the wheelhouse outer member 15.

[0046] Furthermore, in the above embodiment, the wheelhouse cover 16 joined to the outer side of the wheelhouse outer 15 in the vehicle width direction is not considered to be a component that constitutes part of the three-dimensional curved surface portion 18, but the upper region of the wheelhouse cover 16 may also be made to constitute part of the three-dimensional curved surface portion 18.

[0047] Furthermore, in the above embodiment, the rear wheel house 10 (wheel house) is made up of a plurality of members, but the wheel house may be made up of a single member.

[0048] In the above embodiment, the step 40 is provided in a part of the side region 14s of the wheelhouse 10 (wheelhouse), but it is preferable that the wheelhouse has a structure without a step. In this case, the support rigidity of the input portion of the wheelhouse to which the suspension load is applied can be more efficiently increased. [Explanation of symbols]

[0049] 10...Rear wheelhouse (wheelhouse) 10u…upper area 11...Rear wheel (wheel) 12...Damper 13...Damper base 14s...Side wall part (inner area) 18...Three-dimensional curved surface part 19...Three-dimensional curved surface 40...Double part 50...Rear seat (interior part)

Claims

1. a wheel house disposed on a side of the vehicle body so as to surround an upper outer periphery of the wheel and an inner side in the vehicle width direction; a damper base fixed to an inner surface of an upper region of the wheelhouse to support an upper portion of a damper of a suspension; The upper region of the wheel house is provided with a three-dimensional curved surface portion that is curved in all of the side view, the front-rear view, and the up-down view and that is convex upward and has no inflection point, the damper base is fixed only to the inner surface of the three-dimensional curved surface portion, A rear seat is installed in the rear of the vehicle cabin in the vicinity of the wheelhouse, a step portion recessed inward of the wheel house to avoid interference with the rear seat is provided in a portion near the front end of an inner region of the wheel house that is continuous with the upper region of the wheel house toward the inner side in the vehicle width direction, A vehicle body side structure, characterized in that the three-dimensional curved surface portion to which the damper base is fixed is formed in a position that does not overlap with the step portion in the fore-and-aft direction of the vehicle body.

2. 2. The vehicle body side structure according to claim 1, characterized in that an inner region of the upper region of the wheelhouse, which is connected to the three-dimensional curved surface portion on the inner side in the vehicle width direction, is provided with a three-dimensional curved surface that is connected to the three-dimensional curved surface portion, is curved in all directions, such as when viewed from the side, front to back, and up and down, and has no inflection points and is convex on the inner side in the vehicle width direction.

3. 2. The vehicle body side structure according to claim 1, wherein the damper base is fixed only to a single panel member that constitutes the three-dimensional curved surface portion of the wheel house.

4. 2. The vehicle body side structure according to claim 1, wherein the damper base is fixed to the three-dimensional curved surface portion by non-penetrating laser welding.

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