Vehicle bumper structure

[0035] Hereinafter, the present invention will be described in detail based on the illustrated embodiment.

[0036] Figure 1 to Figure 5 The bumper structure of the vehicle according to the embodiment of the present invention is shown.

[0037] Such as figure 1 with figure 2 As shown, the front part 1 of the vehicle to which the bumper structure according to the embodiment of the present invention is applied mainly includes: a pair of left and right apron side members (apron side members) 2, which extend in the front-rear direction of the vehicle and exist between them. Disposed on the left and right sides of the vehicle width direction with clearance; and the resin bumper center net 3 and the front bumper 4 located in front of the apron side members 2 of the vehicle. The bumper center net 3 is arranged on the back side of the front bumper 4 .

[0038] In the vehicle front portion 1 of the present embodiment, the leg portion L of the pedestrian extending in the vertical direction of the vehicle is located at the front left of the front bumper 4 of the vehicle. In addition, according to the configuration of the present embodiment, the legs of the human body model for collision analysis made based on the average physique of an adult male are used as the legs L of a pedestrian, but it is not limited to this. In addition, a rod-shaped object other than the leg L of the pedestrian may also be used as the collision object.

[0039] The skirt side member 2 is a rigid member that forms the main frame of the vehicle front 1, such as figure 2 As shown, a hood lock member 14 extending in the vehicle width direction is arranged on the upper side of the vehicle body near the front end portion of the skirt side member 2. In addition, a radiator support member 5 for a frame extending in the vehicle width direction is arranged on the lower side of the vehicle body near the front end of the skirt side member 2, and the lower part of the front end of the skirt side member 2 on the left and right passes through The radiator support member 5 and the like are connected. In addition, the cover lock member 14 and the radiator support member 5 are connected by a lamp support brace 6 arranged on the left and right sides of the vehicle front 1 and extending in the vertical direction of the vehicle.

[0040] Such as figure 2 with Figure 4 As shown, the radiator support member 5 of this embodiment includes an upper plate 7 and a lower plate 8 arranged up and down. By joining the overlapping portions of the upper plate 7 and the lower plate 8, the radiator support member 5 is configured to be viewed from the vehicle side When viewed from the side, a substantially rectangular closed cross-section is formed. Therefore, the upper plate 7 is curved to have a hat-shaped cross section when viewed from the side of the vehicle, and the lower plate 8 is curved to have a crank-shaped cross section when viewed from the side of the vehicle. Therefore, in the joined state of the upper plate 7 and the lower plate 8, a portion that is L-shaped when viewed from the side of the vehicle is structured on the vehicle front side of the substantially rectangular closed cross-sectional structure, and the L-shaped portion becomes a high The buffer structure 9 of the load absorbing portion that is more easily deformed than the rigid closed cross-section structure.

[0041] On the other hand, such as Figure 1 to Figure 5 As shown, the front bumper 4 of this embodiment includes: a resin bumper 10, which is arranged on the front end side of the vehicle front 1; and a resin spoiler 11, which is arranged in front of the lower part of the resin bumper 10 and along the vehicle Extending in the width direction, this resin spoiler 11 is provided with a metal plate member 12 joined together by insert molding. The resin spoiler 11 is formed to have a substantially U-shaped cross section when viewed from the side of the vehicle. In order to obtain a sense of integration with the resin spoiler 11, the shape of the metal plate member 12 is bent to conform to the shape of the spoiler. In addition, the main part of the metal plate member 12 is covered by the resin spoiler 11.

[0042] The rear part of the resin spoiler 11 and the rear part of the metal plate member 12 are formed in a shape extending toward the rear of the vehicle. In addition, among the resin spoiler 11 and the metal plate member 12 that extend toward the rear of the vehicle, only the metal plate member 12 that is exposed from the resin spoiler 11 and extends farther toward the rear of the vehicle is as image 3 The reference numeral W in the figure shows that it is joined by welding, fasteners, or the like and installed to the underside of the lower plate 8 forming the radiator support member 5. Therefore, the vehicle rear end of the metal plate member 12 is bent obliquely upward toward the lower surface of the lower plate 8 and then further bends in the horizontal direction, so that the portion overlapping and fixed to the lower surface of the lower plate 8 is formed into a flat shape. .

[0043] Such as Figure 4 with Figure 5 As shown, on the back side of the resin spoiler 11 of this embodiment, an upper protrusion 23 and a lower protrusion 24 for mounting the resin spoiler 11 to the front and lower side of the resin bumper 10 are protrudingly provided. These upper convex body 23 and lower convex body 24 have threaded holes 23a and 24a for screwing in screws 25, are formed integrally with each other sandwiching a curved portion located in the front of the vehicle, and are provided at least on the left and right sides in the vehicle width direction and Central department. In addition, corresponding to the upper protrusion 23 and the lower protrusion 24, a screw hole 26 into which the screw 25 is inserted is provided.

[0044] In addition, such as Figure 4 with Figure 5 As shown, the metal plate member 12 of this embodiment is formed of two parts in the front and rear direction of the vehicle, namely, a deformable front metal plate portion 12a arranged on the front side of the vehicle and a high rigidity rear part arranged on the rear side of the vehicle. The side metal plate portion 12b is formed. In the metal plate member 12, the plate thickness of the rear-side metal plate portion 12b extending toward the rear of the vehicle is set to be larger than the plate thickness of the front-side metal plate portion 12a.

[0045] In addition, the upper convex body 23 is arranged to overlap the front metal plate portion 12a with a small plate thickness in the vehicle front and rear direction, and the lower convex body 24 is arranged to overlap the rear metal plate portion 12b with a large plate thickness in the vehicle vertical direction. .

[0046] In addition, the metal plate member 12 is formed in advance by press forming to have the shape of the front side metal plate portion 12a to be embedded in the resin spoiler 11 and the shape of the rear side metal plate portion 12b to be attached to the vehicle body side. The front metal plate portion 12 a with a small plate thickness and the rear metal plate portion 12 b with a large plate thickness are joined to form a part of the metal plate member 12 as a tailor-welded plate portion 13. In addition, the front metal plate portion 12a and the tailor-welded plate portion 13 are set so as not to be exposed to the outside during insert molding and are covered by the resin spoiler 11, thereby being configured to prevent rainwater, mud, etc. from accumulating near the tailor-welded plate portion 13 The uneven part and prevent the occurrence of rust.

[0047] In addition, such as Figure 4 As shown, the front end of the buffer structure 9 provided on the radiator support member 5 is arranged to be located at the front side metal plate portion 12a with a small plate thickness and the rear side metal plate portion 12b with a large plate thickness when viewed from the side of the vehicle. The position of the junction K is the same position. Therefore, the area on the vehicle front side of the boundary K is formed as the load (energy) absorption control area A, and the area on the vehicle rear side of the boundary K is formed as the high rigidity area B.

[0048] When a pedestrian's leg L hits the front part 1 of the vehicle including the bumper structure according to the embodiment of the present invention configured as above when a collision occurs, and the load from the leg part L is applied to the lower part of the front bumper 4 from the front of the vehicle, it is located The front side metal plate portion 12a of the resin spoiler 11 and the metal plate member 12 in the load absorption control area A on the front side of the vehicle at the boundary K deforms and absorbs the load from the leg portion L. Thereafter, the rear side metal plate portion 12b and the buffer structure 9 of the metal plate member 12 in the high rigidity area B on the vehicle rear side of the junction K with a large plate thickness are deformed and support the legs while absorbing the load The lower end of L, and when the deformation of these parts ends, the closed cross-sectional structure of the radiator support member 5 with the highest rigidity supports the lower end of the leg L, and the leg L is maintained in an inclined linear shape.

[0049] Therefore, for the bumper structure according to the embodiment of the present invention, when the pedestrian's leg L hits the lower part of the front bumper 4 of the vehicle front 1 when colliding with the vehicle, the resin spoiler 11 and the metal plate member 12 The front side metal plate portion 12a with a small plate thickness is deformed. Thereafter, the rear side metal plate portion 12b with a large plate thickness of the metal plate member 12 and the radiator support member 5 support the lower end of the leg portion L, so that the pedestrian's leg The portion L is maintained in an inclined linear shape, which can prevent a load from being locally applied to the leg portion L and can reduce the burden on pedestrians. In addition, it can effectively absorb the load from the leg portion L.

[0050] In addition, for the bumper structure of this embodiment, since the resin spoiler 11 and the metal plate member 12 are formed as one body, there is no need to leave a gap between the two, and the front bumper 4 can be hit from the leg L The load starts to be absorbed at the lower end, which can ensure sufficient load absorption time and achieve good load absorption performance. In addition, since the metal plate member 12 of the present embodiment is arranged to extend to the arrangement position of the skirt plate side members 2 arranged on the left and right sides in the vehicle width direction, it is no longer necessary to arrange on the skirt plate side in the conventional structure. The beam 2 is an impact load absorbing member in front of the vehicle.

[0051] In addition, for the bumper structure of the present embodiment, the resin spoiler 11 and the metal plate member 12 are arranged to protrude forward of the lower part of the resin bumper 10, and the lower part of the resin bumper 10 is not formed in a protruding shape, Therefore, the moldability of the resin bumper 10 is not impaired and the resin bumper 10 can be manufactured with high precision.

[0052] In addition, in the bumper structure of the present embodiment, of the upper convex body 23 and the lower convex body 24 provided on the back side of the resin spoiler 11, the lower convex body 24 is particularly arranged in the vertical direction of the vehicle. The position where the thicker rear metal plate portion 12b overlaps. Therefore, the resin bumper 10, the resin spoiler 11, and the radiator support member 5 of the frame are joined by the thicker rear metal plate portion 12b Therefore, the resin bumper 10 and the resin spoiler 11 can be reliably fixed to the radiator support member 5.

[0053] The embodiments of the present invention are described above, but the present invention is not limited to the above-mentioned embodiments, and various modifications and changes can be made based on the technical idea of ​​the present invention.

[0054] For example, in the above-described embodiment, the rear metal plate portion 12b of the metal plate member 12 with a larger plate thickness is provided almost along the entire front bumper 4 in the vehicle width direction, but as Image 6 As shown, a plurality of (three in the modified example) of the rear side metal plate portion 12b with a larger plate thickness may be spaced apart from each other in the vehicle width direction and partially provided to the resin spoiler forming the front bumper 4 11.

[0055] In addition, in the above embodiment, only the metal plate member 12 extending toward the rear of the vehicle is attached to the radiator support member 5 of the frame, but the resin spoiler 11 extending toward the rear of the vehicle may also be attached together with the metal plate member 12 To the radiator support member 5. In addition, for the bumper structure of the present invention, the resin spoiler 11 and the metal plate member 12 can be manufactured separately, and the metal plate member 12 can be pasted on the back of the resin spoiler 11 and the back of the resin spoiler 11 Combine as one. According to this bumper structure, manufacturing can be simplified compared with integral molding.