JP6750493B2 - Vehicle front structure - Google Patents

Description

The present invention relates to a vehicle front structure.

Generally, in a vehicle front structure, an absorber extending in the vehicle width direction may be provided at a position where it collides with a pedestrian's lower leg (a position below a side member). While such an absorber needs to absorb the impact in order to protect the lower leg of the pedestrian, from the viewpoint of protecting the whole body of the pedestrian, in order to make it easier for the leg of the pedestrian to jump up. It is preferable to secure a predetermined rigidity.

Therefore, a configuration has been proposed in which a reinforcing element (absorber) having a reinforcing rib is provided in the lower impact region of the front bumper (see, for example, Patent Document 1). By providing the reinforcing element as described in Patent Document 1, the rigidity of the lower impact region of the front bumper is ensured and the pedestrian is protected.

Japanese Patent Publication No. 2008-506589

In the reinforcing element described in Patent Document 1, the reinforcing rib projects from the lower surface of the plate-shaped member along the horizontal plane. If such reinforcing ribs are exposed, the aerodynamic performance during traveling may be affected, or wind noise may occur. Therefore, in the invention described in Patent Document 1, the reinforcing rib is covered from the lower side by the shell-shaped section (a part of the bumper). However, when the bumper is extended to cover the reinforcing ribs in this way, the weight of the vehicle body increases.

Therefore, a configuration in which a reinforcing rib is provided on the upper surface of the plate-shaped member is conceivable. However, there is a case where the space for the reinforcing rib cannot be secured on the upper side. That is, it is necessary to dispose the plate member lower than the fixing portion fixed to the frame member of the vehicle (braces extending in the up-down direction), as compared with the configuration in which the plate member is simply extended to the front side from the fixing portion. However, the rigidity with respect to the load from the front decreases, and it becomes difficult for the pedestrian's leg to flip up.

An object of the present invention is to provide a vehicle front structure capable of facilitating a leg of a pedestrian to flip up while suppressing an increase in vehicle body weight.

Vehicle front structure of the present invention, below the pair of right and left side members extending in a longitudinal direction of the vehicle, provided with a absorber extends in the vehicle width direction, before Symbol absorber, fixed arranged in the vehicle width direction frame member of the vehicle a plurality of fixing portions to be the a lid-shaped portion extending forward side of the fixing unit, a vehicle front structure which have the said cap-like portion includes a first lid-shaped extending forward from the fixed portion and parts, and a second lid-shaped portion extending on the front side, and the lower rib protruding from the lower surface of the first cap-like portion, and the upper rib protruding from the upper surface of the second cap-like portion, is provided with The second lid-shaped portion is provided between the first lid-shaped portions .

According to the vehicle front structure of the present invention, it is possible to easily increase the leg of a pedestrian while suppressing an increase in vehicle body weight.

It is a perspective view showing a vehicle front structure concerning an example of the present invention. FIG. 3 is a perspective view showing an absorber in the vehicle front structure. It is a perspective view which shows the said absorber. It is sectional drawing which followed the AA line of FIG. It is sectional drawing which followed the BB line of FIG. It is sectional drawing which followed the CC line of FIG. FIG. 3 is a perspective view showing a fender lining of the vehicle structure. It is a bottom view showing the important section of the above-mentioned vehicle front structure. FIG. 3 is a perspective view showing a bumper of the vehicle front structure. It is a top view which shows the principal part of the said vehicle front structure.

The invention described in claim 1 is a vehicle front structure including an absorber extending in the vehicle width direction below a pair of left and right side members extending in the vehicle front-rear direction, wherein the absorber is provided at an outer side portion in the vehicle width direction. It has a fixed portion fixed to a skeletal member of the vehicle and a lid-shaped portion that extends forward of the fixed portion along a horizontal plane, and the lid-shaped portion protrudes from a lower surface at an outer portion in the vehicle width direction. It is characterized in that a lower rib and an upper rib projecting from the upper surface at a central portion in the vehicle width direction are provided.

According to such an aspect of the invention, since the lower rib projects from the lower surface in the outer portion of the lid-shaped portion, the lid-shaped portion can extend from the fixed portion to the front side in the outer portion, and The rigidity with respect to the load can be secured, and the pedestrian's leg can be easily flipped up. Even if the lower rib is projected on the outer side portion, deterioration of aerodynamic performance and generation of wind noise are unlikely to occur. Further, even if the lower rib is covered from the lower side with a bumper or the like, an increase in vehicle weight can be suppressed as compared with a configuration in which the entire absorber is covered from the lower side.

Further, since the upper rib projects from the upper surface in the central portion of the lid-shaped portion, it is necessary to dispose the lid-shaped portion lower than the fixed portion, and the rigidity is likely to decrease, but the central portion is lower than the outer portion. There is plenty of space, and it is easy to increase the vehicle longitudinal dimension of the absorber. This makes it easier for the pedestrian to flip up the leg.

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the vehicle front structure 10 of the present embodiment is provided on the front side of a pair of left and right side members 100, and includes a bumper member 2, a brace 3, a lower cross member 4, and an absorber 5. And a fender lining 6 described later and a bumper 7 described later. In this embodiment, the vehicle front-rear direction is the X direction, the vehicle width direction is the Y direction, and the vertical direction is the Z direction. Further, in the Y direction, the center side of the vehicle is “inside” and the vehicle outside is “outside”.

The bumper member 2 is formed in the shape of a strip plate along the YZ plane and having the Y direction as a longitudinal direction. The bumper member 2 extends across the front ends of a pair of side members 100 extending in the X direction, and both ends thereof are outside the side member 100. It is provided so as to project into. That is, the bumper member 2 is connected to the front end portion of the side member 100 near both ends thereof. A bumper member absorber 21 protruding from the front surface of the bumper member 2 is provided at an end portion in the Y direction of the bumper member 2 (a portion protruding outward from the side member 100).

The brace 3 is a radiator support brace formed in a rectangular tube shape, is connected to the lower surface of the front end portion of the side member 100, extends in the Z direction, and functions as a skeletal member of the vehicle. The lower end of the brace 3 is placed on the upper surface of the lower cross member 4 and fixed to the lower cross member 4 (see FIG. 4).

The lower cross member 4 is formed in the shape of a strip plate along the XY plane and having the Y direction as the longitudinal direction, and is provided between the lower end portions of the pair of braces 3. The lower cross member 4 is superposed on the upper surface of the absorber 5, and is fixed by a fixing member such as a bolt. As shown in FIG. 4, flange portions 41 are formed at both ends of the lower cross member 4 in the Y direction so that the flange portions 41 overlap the upper surface of the absorber 5 (the upper surface of an outer lid-shaped portion 521 described later).

As shown in FIGS. 2 and 3, the absorber 5 is formed in a strip plate shape having the Y direction as the longitudinal direction along the XY plane, and is connected to the lower end portion of the brace 3 via the lower cross member 4. In addition, it is provided across the pair of left and right braces 3. The flange portion 41 of the lower cross member 4 is superposed on the upper surface of the absorber 5, and a fixing member such as a bolt is inserted into the insertion hole of the flange portion 41 and the insertion hole 51 of the absorber 5, so that the absorber 5 is moved. Is fixed to the brace 3 via the lower cross member 4. The absorber 5 is fixed to the frame member of the vehicle at the outer side in the Y direction where the insertion hole 51 is formed, and the insertion hole 51 functions as a fixing portion. In addition to the insertion hole 51, the absorber 5 also has a plurality of fixing portions 50 for attachment to the vehicle body.

The absorber 5 has a lid-shaped portion 52 extending along the XY plane. The lid-shaped portion 52 includes an outer lid-shaped portion 521 that is an outer portion in the Y direction, a central lid-shaped portion 522 that is a central portion in the Y direction, and a front lid-shaped portion that is in front of the outer lid-shaped portion 521 and the central lid-shaped portion 522. 523 and. The insertion hole 51 is formed at the Y direction inner side portion of the outer lid portion 521 and at the X direction central portion. That is, the outer lid portion 521 extends forward from the insertion hole 51 along the horizontal plane.

The brace 3 connected to the front end of the side member 100 is fixed to the absorber 5 via the lower cross member 4 in the insertion hole 51 formed in the outer lid portion 521, and the central lid portion 522 is arranged in the Y direction. It is provided inside the side member 100 (between the pair of side members 100). The outer lid-shaped portion 521 is provided above the central lid-shaped portion 522, and these are connected by a step portion extending in the Z direction.

The front lid-shaped portion 523 is arranged such that the rear end side is at the same height as the central lid-shaped portion 522, and has an inclination toward the front side along the design surface of the bumper 7 toward the front side. .. The front end portion (upper end portion) of the front lid-shaped portion 523 is provided above the lower cross member 4 (see FIG. 6 ). The front end of the front lid portion 523 is located in front of the side member 100 and the bumper member 2, that is, the front end of the absorber 5 is arranged in front of the front end of the side member 100.

As shown in FIGS. 5 and 6, a lower rib 53 protruding from the lower surface is formed on the outer lid-shaped portion 521, and an upper rib 54 protruding from the upper surface is formed on the central lid-shaped portion 522. The upper rib 55 protruding from the upper surface is formed in the portion 523. The height difference between the outer lid portion 521 and the central lid portion 522 is approximately the same as the height (projection size) of the ribs 53 and 54. The ribs 53 to 55 are formed in a lattice shape having a portion extending in the X direction and a portion extending in the Y direction.

The lower rib 53 is formed on the front side, the rear side, and the Y direction outer side of the insertion hole 51 so as to surround the insertion hole 51. That is, the lower rib 53 is provided on the front side, the rear side of the side member 100, and the Y direction outer side than the side member 100. The lid portion 52 may be provided with ribs in all areas, or may have an area in which no ribs are provided.

As shown in FIG. 7, the fender lining 6 is formed in a substantially semicircular shape as viewed in the Y direction so as to form a wheel house 60 of the front tire. The wheel house 60 is formed on the rear side of the brace 3. As shown in FIGS. 4 and 8, the fender lining 6 has a fender lining extension 61 that extends forward from the front end (lower end on the front side) of the wheel house 60. The fender lining extension 61 is overlapped with a portion of the lower rib 53 provided on the rear side of the insertion hole 51, and covers the portion from below.

As shown in FIG. 9, the bumper 7 is provided so as to cover the bumper member 2, the brace 3, the lower cross member 4, and the absorber 5 from the front, and its lower end portion 71 has a front lid as shown in FIGS. It extends to the rear side so as to cover the shaped portion 523 from the lower side. The lower end portion 71 is extended so as not to cover the central lid-shaped portion 522 in the Y-direction central portion, and is extended so as to cover a part of the outer lid-shaped portion 521 from the lower side in the Y-direction outer portion, A bumper extension 711 is formed. That is, the bumper extension portion 711 is overlapped with a portion of the lower rib 53 provided on the front side of the insertion hole 51 and a portion provided on the outer side in the Y direction, and these portions are arranged from the lower side. cover.

The fender lining extension part 61 and the bumper extension part 711 are formed so as to avoid the insertion hole 51, and these cover almost all the lower ribs 53 from the lower side. The fender lining extension 61 and the bumper extension 711 may or may not overlap each other.

According to this embodiment, the following effects are obtained. That is, in the outer lid-shaped portion 521, the lower rib 53 projects from the lower surface, and the outer lid-shaped portion 521 extends forward from the insertion hole 51 as the fixed portion, thereby ensuring rigidity against a load from the front, The leg of a pedestrian can be easily flipped up. Although the lower rib 53 is covered from the lower side by the fender lining extension 61 and the bumper extension 711, an increase in vehicle body weight can be suppressed as compared with a configuration in which the entire absorber is covered from the lower side.

Further, although the upper lid 54 projects from the upper surface of the central lid-shaped portion 522, the central lid-shaped portion 522 is arranged lower than the outer lid-shaped portion 521 in which the insertion hole 51 as the fixing portion is formed. The central portion in the Y direction of 10 has more space than the outer portion, and it is easy to increase the vehicle front-rear direction dimension of the absorber 5. This makes it easier for the pedestrian to flip up the leg.

Further, the side member 100 has high rigidity, and the load at the time of a pedestrian collision tends to increase in the vicinity thereof. Since the lower rib 53 is provided in a portion of the outer lid portion 521 in front of the side member 100, the rigidity of the absorber 5 can be ensured in this portion, and the absorber 5 can be effectively functioned. , Easy to protect pedestrians.

In addition, in the portion of the vehicle front structure 10 outside the side member 100 in the Y direction, if the design is to be ensured, the space margin becomes small, and the shock absorbing region (from the end of the absorber 5 to the skeleton member). It is difficult to secure the distance to the side member 100). Since the lower rib 53 is provided in a portion of the outer lid portion 521 outside the side member 100 in the Y direction, the rigidity of the absorber 5 can be ensured in this portion, and the absorber 5 can be effectively provided. Easy to function and protect pedestrians.

Further, since a part of the lower rib 53 is covered from the lower side by the fender lining extension part 61, deterioration of aerodynamic performance and generation of wind noise are suppressed, and a dedicated cover component is provided. By comparison, the number of parts can be reduced.

Further, since a part of the lower rib 53 is covered from below by the bumper extension portion 711, deterioration of aerodynamic performance and generation of wind noise are suppressed, and in comparison with a configuration in which a dedicated cover component is provided. Thus, the number of parts can be reduced.

Further, since the fender lining extension 61 and the bumper extension 711 are combined and the lower rib 53 is covered from the lower side, only one of the fender lining extension 61 and the bumper extension 711 is provided. As compared with the configuration in which the lower rib 53 is covered with, the complication of the shape of the fender lining or the bumper can be suppressed.

Further, since the front lid-shaped portion 523 is inclined and the front end portion is provided above the lower cross member 4, the front end portion of the front lid-shaped portion 523 is compared with the configuration in which the front lid-shaped portion is not inclined. The height difference between the insertion hole (fixing portion) 51 and the insertion hole (fixing portion) 51 becomes small, and the rigidity at the front end portion can be improved.

The present invention is not limited to the above-described embodiments, 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.

For example, in the above-described embodiment, the lower ribs 53 are provided in a portion of the outer lid portion 521 that is in front of the side member 100 and a portion that is outside of the side member 100, and the central lid portion that is inside of the side member 100 in the Y direction. Although the upper rib 54 is provided in 522, the lower rib and the upper rib may be provided in appropriate regions regardless of the position of the side member 100. That is, the lower ribs may be provided inside the side member 100, and the upper ribs may be provided outside the side member 100. These ribs suppress an increase in vehicle weight. It may be provided in an appropriate area where the rigidity of the absorber can be secured.

Further, in the above-described embodiment, the lower rib 53 is covered from the lower side by the fender lining extension 61 and the bumper extension 711, but either the fender lining extension or the bumper extension is provided. The lower rib may be covered by only one. According to such a configuration, it is not necessary to form the extension portion on the other side, and the conventional component can be used. Further, the fender lining or the bumper may not be provided with the extending portion, and a dedicated component for covering the lower rib may be provided. In addition, when the region where the lower rib is provided is narrow and the aerodynamic performance is not easily deteriorated and wind noise is less likely to occur, the lower rib may not be covered from below.

In addition, the best configuration, method, etc. for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention is mainly illustrated and described with respect to particular embodiments, but without departing from the scope and spirit of the invention, the shape of the embodiments described above Those skilled in the art can make various modifications in terms of material, quantity, and other detailed configurations. Therefore, the description limiting the shapes and materials disclosed above is described as an example for facilitating the understanding of the present invention, and does not limit the present invention. The description with the names of members excluding some or all of the above limitations is included in the present invention.

10 Vehicle front structure 100 Side member 3 Brace (frame member)
5 Absorber 51 Insertion hole (fixed part)
52 Lid 53 Lower Rib 54 Upper Rib 6 Fender Lining 60 Wheelhouse 61 Fender Lining Extension 7 Bumper 711 Bumper Extension

Claims (5)

Below the pair of right and left side members extending in a longitudinal direction of the vehicle, provided with a absorber extends in the vehicle width direction, before Symbol absorber, a plurality of fixing portions fixed to a frame member of the vehicle are arranged in the vehicle width direction, a vehicle front structure which have a, a lid-shaped portion extending forward side of the fixed portion,
The lid portion is
A first lid-shaped portion extending from the fixed portion to the front side;
A second lid-shaped portion extending forward,
A lower rib protruding from the lower surface of the first lid-shaped portion ,
And an upper rib protruding from the upper surface of the second lid-shaped portion ,
The vehicle front structure, wherein the second lid-shaped portion is provided between the first lid-shaped portions . The second lid-shaped portion extends from the position lower than the first lid-shaped portion toward the front side of the fixing portion, and is inclined upward from the rear side toward the front side. The vehicle front structure according to Item 1. A front lid-shaped portion is provided in front of the first lid-shaped portion and the second lid-shaped portion,
The vehicle front structure according to claim 1 or 2, wherein the first lid-shaped portion and the second lid-shaped portion extend forward and are connected to the front lid-shaped portion . The front end of the absorber is arranged in front of the front end of the side member,
The upper rib is provided inside the vehicle width direction with respect to the side member,
The lower rib is provided at least in front of the side member,
Further comprising a bumper provided in front of the absorber,
The vehicle front according to claim 1 , wherein the bumper has a bumper extension portion that extends rearward from a lower end portion and covers at least a part of the lower rib from a lower side. Construction. Below the pair of right and left side members extending in a longitudinal direction of the vehicle, the absorber extends in the vehicle width direction, a fender linings that make up the wheel house, a vehicle front structure Ru comprising,
The absorber is
A fixed portion fixed to a frame member of the vehicle at an outer side portion in the vehicle width direction,
A lid-shaped portion extending forward of the fixed portion,
The lid portion includes
A lower rib protruding from the lower surface at the outer side in the vehicle width direction,
An upper rib protruding from the upper surface at the center portion in the vehicle width direction is provided,
The fender linings of the vehicle front structure, wherein the Turkey of having a said fender lining extending portion which extends forward from the front end portion of the wheel house covering at least a portion of the lower ribs from the lower side.

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