JP6776872B2 - Vehicle front structure - Google Patents

Description

The present invention relates to a vehicle front structure.

Conventionally, in a small and lightweight vehicle, a design capable of absorbing a load from the front of the vehicle has been required even in a limited space in the front-rear direction of the vehicle, and various load absorbing structures have been proposed ( For example, see Patent Document 1.).

The conventional absorber structure described in Patent Document 1 is a box having a front opening protruding toward the rear of the vehicle on the front end surface of the side member in a vehicle in which a bumper member is not provided in front of the side member extending in the front-rear direction of the vehicle. The shape of the absorber is attached. The box has a bottom surface portion located on the rear side of the vehicle and a side wall portion extending from the bottom surface portion toward the front of the vehicle, and the side wall portion is provided with a notch extending in the front-rear direction of the vehicle. As a result, when a load is received from the front of the vehicle, the side wall portion of the absorber is uniformly deformed, and the load can be absorbed.

International Publication No. 2012/12403

However, when the distance between the front design surface and the skeleton member such as a side member or brace behind it is short, further improvement in load absorption performance is required. Therefore, an object of the present invention is to provide a vehicle front structure capable of further reducing the load from the front of the vehicle.

According to the present invention, in a vehicle including a bumper and a skeleton member, the skeleton member is attached to a pair of left and right side members extending in the front-rear direction of the vehicle and a front end portion of the side member, and is upward or downward, or It has a brace member extending to both of them and a bumper member provided over the pair of left and right side members at the front end portion of the side member, and the bumper is arranged in front of the brace member and the bumper. An absorber having a front surface portion and a rear surface portion is arranged below the bumper member between the skeleton member and the skeleton member, and a part of the absorber overlaps with the skeleton member in a front view from the front side of the vehicle. Further, the above problem is solved by providing a vehicle front structure characterized in that the other portion of the absorber protrudes outward in the vehicle width direction from the bumper member in the vehicle width direction.

According to the vehicle front structure of the present invention, the load absorbing performance can be improved even when the distance between the front design surface and the skeleton member such as a side member or a brace behind the design surface is short.

It is a perspective view of the vehicle front structure which concerns on embodiment of this invention. It is a perspective view which shows the state which the bumper main body was removed in the vehicle front structure shown in FIG. It is a perspective view which shows by omitting the lower net in the main part of the vehicle front structure shown in FIG. It is a front view which shows the main part of the vehicle front structure shown in FIG. It is a perspective view from the rear surface side which shows the absorber in the vehicle front structure shown in FIG. It is a perspective view from the rear side of the vehicle which shows the structure in which an absorber is assembled in the vehicle front structure shown in FIG. It is a figure which shows typically the absorber and the lower brace in the cross section of the arrow AA of FIG. It is a figure which shows the vehicle front structure which concerns on the modification of this invention from the vehicle rear side. It is a figure which shows the other modification of this invention.

According to the first aspect of the present invention, in a vehicle including a bumper and a skeleton member, the skeleton member is attached to a pair of left and right side members extending in the front-rear direction of the vehicle and a front end portion of the side member. A brace member extending upward, downward, or both, the bumper is arranged in front of the brace member, and a front surface portion and a rear surface portion are provided between the bumper and the skeleton member. The absorber to be held is arranged, and when viewed from the front side of the vehicle, a part of the absorber overlaps with the skeleton member, and the other part of the absorber is arranged from the outermost skeleton member in the vehicle width direction. Is also a vehicle front structure characterized in that it protrudes outward in the vehicle width direction.

As a result, when a force is applied to the front surface of the vehicle and the absorber comes into contact with a skeleton member such as a side member or a brace member, the outer portion of the absorber in the vehicle width direction rotates to the rear side of the vehicle with the contacted portion as a fulcrum. Then, the load can be released. Therefore, even when the distance between the front design surface and the skeleton member such as the side member or the brace member behind it is short, the load absorption performance can be improved. For example, even if the front surface of the vehicle collides with a pedestrian, the load applied to the pedestrian's legs from the skeletal members such as side members and brace members can be reduced.

Hereinafter, examples of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the vehicle front structure 1 of this embodiment is a structure in a vehicle including a skeleton member 2, a bumper 3, an absorber 4, and a lower absorber 5. In this embodiment, the left-right direction is the arrow X direction (vehicle width direction) in FIG. 1, the front-rear direction is the arrow Y direction in FIG. 1, the vertical direction is the arrow Z direction in FIG. 1, and the arrow X side is the arrow X direction. To the left, the arrow Y pointing side is backward, and the arrow Z arrow pointing side is upward. In addition, the inside and outside shall correspond to the inside and outside of the vehicle. Further, in this embodiment, the left side of the vehicle will be illustrated and described, but the right side of the vehicle also has a similar structure in which the left and right sides are reversed.

As shown in FIG. 2, the skeleton member 2 absorbs a pair of left and right side members 21 extending in the front-rear direction of the vehicle, brace members 22 attached to the front end portions of the left and right side members 21, respectively, and a load from the front of the vehicle. It has a bumper member 23 and.

The side member 21 is a rigid member forming a main skeleton in the vehicle front structure 1, and a brace member 22 and a bumper member 23 are attached to the front end side of the side member 21. The brace member 22 is attached to the front end side of the side member 21, and has an upper brace 221 extending upward and a lower brace 222 extending downward. In this embodiment, the front end side of the side member 21 projects forward from the brace member 22. As shown in FIG. 2, the bumper member 23 is a member extending along the upper end portion of the lower net 32 described later, and is provided over a pair of left and right side members 21 at the front end portion of the side member 21. In this embodiment, of the skeleton members 2, the upper brace 221 and the lower brace 222 are arranged on the outermost side in the vehicle width direction.

As shown in FIGS. 1, 2, and 3, the bumper 3 has a bumper main body 31, a lower net 32, an air guide 33, and a trapezoidal member 34 for fixing the absorber 4. Although the trapezoidal member 34 is separate from the members constituting the bumper 3 in the present embodiment, the trapezoidal member 34 is integrally molded with the members such as the bumper main body 31, the lower net 32, and the air guide 33 constituting the bumper 3. You may be.

The bumper main body 31 is a resin cover member that covers the entire lower portion of the front surface of the vehicle, and the lower portion of the bumper main body 31 is provided with an opening 311 extending in the left-right direction. The lower net 32 is a resin member that is assembled to the lower part of the bumper main body 31 and covers the opening 311 of the bumper main body 31, and is formed in a grid pattern. The air guide 33 is a resin member assembled to the upper inner surface of the bumper main body 31, and has a shape along the upper inner surface of the bumper main body 31. As shown in FIGS. 3 and 6, the trapezoidal member 34 includes an assembly surface portion 341 to which the absorber 4 is assembled, a side surface portion 342 extending forward from the upper and lower edge edges of the assembly surface portion 341, and an assembly surface portion 341. It has a hole 343 for assembling the absorber 4 provided in the above. Further, the assembling surface portion 341 is parallel to the XZ plane, and the side surface portion 342 extends from the assembling surface portion 341 and is attached to the lower net 32. Further, an assembly part such as a clip is inserted through the hole 343, and the absorber 4 is assembled.

As shown in FIGS. 3, 4, and 5, the absorber 4 is a resin member having a thickness in the front-rear direction and having a rectangular shape in a front view, and is arranged between the bumper 3 and the brace member 22. There is. The absorber 4 has a front surface portion 41 on the bumper 3 side and a grid-like rib 42 erected from the front surface portion 41 on the rear side of the vehicle, which is formed in a rectangular flat plate shape. Further, the absorber 4 has a rear surface portion 43 formed on the brace member 22 side by a virtual surface connecting the rear end portions of the grid-like ribs 42 to the vehicle. Further, as shown in FIGS. 3 and 6, the absorber 4 is provided with an assembly part such as a clip inserted through a hole 411 provided in the front surface portion 41 and a hole 343 provided in the assembly surface portion 341. It is fixed to the assembling surface portion 341 of the shape member 34. Although the lower net 32 is not shown in FIGS. 3 and 4, the absorber 4 is shown at the assembly position for convenience.

Further, the rear surface portion 43 has an inclined portion 431 that inclines toward the front side of the vehicle toward the inside in the vehicle width direction at a position overlapping the lower brace 222. That is, as shown in FIG. 5, the inclined portion 431 is formed so that the dimensions of the grid-like ribs 42 in the front-rear direction become smaller toward the inside in the vehicle width direction. Further, the grid-like ribs 42 are formed only in the upper portion (upper in the arrow Z direction) of the inclined portion 431, avoiding the lower portion in which the holes 411 are formed. Since the absorber 4 is formed to have the rib 42, the weight of the absorber 4 can be reduced and the rigidity of the absorber 4 can be ensured.

The front surface portion 41 and the rear surface portion 43 are not limited to a flat surface that constitutes the front surface portion 41, but are formed of a surface having irregularities as long as they can come into contact with the skeleton member 2 and the bumper 3 without bias. You may be. Further, the front surface portion 41 and the rear surface portion 43 may be configured by a virtual surface such as a surface connecting the rear end portions of the grid-like ribs 42 to the vehicle rear surface portion 43 like the rear surface portion 43.

As shown in FIG. 4, when the absorber 4 is assembled to the lower net 32, a part (inner part in the vehicle width direction) overlaps with the lower abrace 222 and another part (vehicle) when viewed from the front side of the vehicle. The portion on the outer side in the width direction) protrudes outward in the vehicle width direction from the lower brace 222. Further, as shown in FIG. 3, the absorber 4 is arranged between the bumper member 23 and the lower absorber 5 in the vertical direction.

The lower absorber 5 is a resin member provided at the lower end of the lower absorber 222 on the left and right sides of the vehicle. Further, the lower absorber 5 is provided so as to project forward of the vehicle from other members. By providing the lower absorber 5, when a pedestrian collides with the front surface of the vehicle, the legs of the pedestrian can be flipped up to reduce the load applied to the entire body of the pedestrian.

Next, the movement of the absorber 4 when an object or a pedestrian collides with the front surface of the vehicle of this embodiment will be described with reference to FIG. 7. When an object or a pedestrian collides with the vehicle of this embodiment and a load (indicated by the arrow F in FIG. 7) is applied, the absorber 4 moves toward the rear of the vehicle and comes into contact with the lower brace 222. When the absorber 4 and the lower absorber 222 come into contact with each other, the absorber 4 rotates in the direction of arrow R in FIG. 7, that is, the outer portion of the absorber 4 to the rear side of the vehicle with the contacted portion as a fulcrum. As a result, the load from the front of the vehicle can be released to the outside of the vehicle to absorb the load from the front of the vehicle. Further, since the absorber 4 has the inclined portion 431, when the absorber 4 and the lower absorber 222 come into contact with each other, the vehicle outer side portion of the absorber 4 rotates in the arrow R direction, and the absorber 4 further shifts to the vehicle outer side. Therefore, it is possible to easily move an object or a pedestrian that collides with the front surface of the vehicle to the outside of the vehicle.

According to this embodiment, when a force is applied to the front surface of the vehicle and the absorber 4 comes into contact with the lower absorber 222, the outer portion of the absorber 4 in the vehicle width direction rotates to the rear side of the vehicle with the contacted portion as a fulcrum. The load can be released. Therefore, even when the distance between the front design surface (outer surface of the bumper body 31) and the rear brace member 22 is short, the load absorbing performance can be improved. For example, even if the front surface of the vehicle collides with a pedestrian, the load applied from the brace member 22 to the pedestrian's legs can be reduced.

Further, since the absorber 4 has the inclined portion 431, when the absorber 4 and the lower absorber 222 come into contact with each other, the absorber 4 is more likely to rotate in the direction of the arrow R in FIG. Therefore, the load from the front of the vehicle can be easily released to the outside of the vehicle, and the load absorption performance can be further improved.

Further, the absorber 4 is arranged between the bumper member 23 and the lower absorber 5 in the vertical direction, that is, in the front portion of the vehicle of this embodiment, the bumper member 23, the absorber 4, and the lower absorber 5 are arranged in the vertical direction. Is placed. From this, even if the vehicle collides with a pedestrian, each member of the bumper member 23, the absorber 4, and the lower absorber 5 can absorb the load from the front of the vehicle. Therefore, for example, even if the front surface of the vehicle collides with the pedestrian, it is possible to suppress the local load from being applied to the legs of the pedestrian.

The present invention is not limited to the above-described embodiment, but includes other configurations and the like that can achieve the object of the present invention, and the following modifications and the like are also included in the present invention. In the following modification, the same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the above-described embodiment, the absorber 4 is provided on the front side of the lower brace 222, but may be provided on the front side of another skeleton member 2. That is, the absorber 4 may be provided at a position where it overlaps with other skeleton members 2 such as the side member 21 and the upper brace 221 when viewed from the front side of the vehicle.

Further, the absorber 4 may be assembled to the bumper 3 (lower net 32) or a skeleton member 2 such as a side member 21 or a brace member 22 as in the above-described embodiment.

Further, the absorber 4 may be separated from or in contact with the member of the bumper 3 and the skeleton member 2 to which the absorber 4 is not assembled (lower brace 222 in this embodiment) in the assembled state. You may.

In the above-described embodiment, the absorbers 4 are assembled to the lower net 32 and provided one on each side of the vehicle, but the number of absorbers 4 is not limited to this. For example, a plurality of absorbers may be assembled in the vertical direction on each of the left and right sides of the vehicle. For example, in the vehicle front structure 1a shown in FIG. 8, the absorbers 4 and 4a are assembled to the lower net 32 and the air guide 33 at the same positions in the left-right direction, respectively. The absorber 4 has the same configuration and arrangement as the above-described embodiment.

On the other hand, the absorber 4a has the same shape as the absorber 4 of the above-described embodiment. Further, the absorber 4a attached to the air guide 33 overlaps with the upper brace 221 and protrudes outward in the vehicle width direction from the upper brace 221 when viewed from the front side of the vehicle. Therefore, when a load is applied from the front of the vehicle, the absorber 4a attached to the air guide 33 comes into contact with the upper brace 221 and the outer portion of the vehicle rotates to the rear side of the vehicle, so that the load can be released. As a result, the load absorption performance can be improved in a wider portion of the front part of the vehicle.

Further, the absorber may be integrally formed with members such as a lower net and an air guide constituting the bumper. For example, the absorber 4b shown in FIG. 9 is integrally formed with the lower net 32b via a thin hinge 43b. The absorber 4b has the same shape as the absorber 4 of the above-described embodiment except that it is integrally formed with the lower net 32b. When assembling the absorber 4b, the absorber 4b is folded back at the hinge 43b so that the absorber 4b is located on the rear side of the vehicle, and is fixed to the lower net 32b with an assembly part such as a clip. Since the absorber 4b is integrally molded with the lower net 32b via the hinge 43b, the number of parts can be reduced. Further, since the absorber 4b is integrally molded, the assembly position of the absorber 4b can be determined, erroneous assembly can be prevented, and workability at the time of assembling the absorber 4b can be improved.

Further, in the above-described embodiment, both the upper brace 221 extending upward and the lower brace 222 extending downward are provided as the brace member 22, but depending on the design of the vehicle, only the upper brace 221 or only the lower brace 222 is provided. Can also be provided.

In addition, the best configuration, method, and the like for carrying out the present invention are disclosed in the above description, but the present invention is not limited thereto. That is, the present invention is mainly illustrated and described with respect to specific embodiments and examples, but the embodiments described above without departing from the scope of the technical idea and purpose of the present invention. Those skilled in the art can make various modifications to the embodiments in terms of shape, material, quantity, and other detailed configurations.

Therefore, the description limiting the shapes, materials, etc. disclosed above is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. Therefore, those shapes, materials, etc. The description by the name of the member which removes a part or all of the limitation such as is included in the present invention.

1, 1a Vehicle front structure 2 Skeleton member 3 Bumper 4, 4a, 4b Absorber 5 Lower absorber 21 Side member 22 Brace member 23 Bumper member 41 Front 43 Rear 431 Inclined

Claims (3)

In a vehicle equipped with a bumper and a skeletal member,
The skeleton member includes a pair of left and right side members extending in the front-rear direction of the vehicle, a brace member attached to the front end portion of the side member and extending upward, downward, or both, and a front end portion of the side member. In the bumper member provided over the pair of left and right side members,
Have,
The bumper is placed in front of the brace member and
An absorber having a front surface portion and a rear surface portion is arranged below the bumper member between the bumper and the skeleton member.
When viewed from the front side of the vehicle, a part of the absorber overlaps with the skeleton member, and the other part of the absorber protrudes outward in the vehicle width direction from the bumper member. Construction. The vehicle according to claim 1, wherein the rear surface portion of the absorber has an inclined portion that is inclined toward the front side of the vehicle toward the inside in the vehicle width direction at a position where the rear surface portion overlaps with the side member or the brace member. Front structure. The side member protrudes forward from the brace member .
At the lower end of the front Symbol brace member further comprises a lower absorber, the,
The vehicle front structure according to claim 1 or 2, wherein the absorber is arranged between the bumper member and the lower absorber in the vehicle vertical direction.

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