WO2012124403A1

WO2012124403A1 - Absorber structure for vehicle front section

Info

Publication number: WO2012124403A1
Application number: PCT/JP2012/052461
Authority: WO
Inventors: 章人宮崎; 増田　出光; 伸司大野
Original assignee: スズキ株式会社
Priority date: 2011-03-16
Filing date: 2012-02-03
Publication date: 2012-09-20
Also published as: CN103370232A; JPWO2012124403A1; JP5692356B2; CN103370232B

Abstract

In a vehicle front section (1) wherein no bumper members are provided forwards of side members (2), a box-shaped absorber (10) that protrudes rearwards and has an open front is attached to the front ends (9) of the side members (2); a rearwards base surface has a central base part (11) disposed in the center thereof and opposing base parts (12 and 13) that are disposed opposite each other so as to sandwich the central base part (11) and are wider than the central base part (11); the rear surface of the central base part (11) is provided with a rearwardly-extending protrusion (14); a flat front-surface part (10a) is provided around the front sides of side wall parts (15 to 18) of the absorber (10) towards the front of the vehicle from the central and opposing base parts (11 to 13), said flat front-surface part having a cross-section extending in a shape roughly similar to the central base part (11); and the side wall parts (15 to 18) are provided with cut-outs (19) each extending in the front/rear direction of the vehicle and being located at a distance from the central base part (11).

Description

Absorber structure at the front of the vehicle

The present invention particularly relates to an absorber structure of a vehicle front portion which is a resin load absorbing material attached to a front end surface of a side member.

Conventionally, a compact design is required for a small and light vehicle. Therefore, in this type of vehicle, the load from the front of the vehicle can be absorbed by the front / rear space having a short front / rear length without providing a bumper member or a thick absorber in the front / rear direction of the vehicle at the front of the vehicle. Design is required.

On the other hand, members such as a side member, a bumper net, and a front bumper are provided at the front of the vehicle. Therefore, the side member does not plastically deform with respect to the front part of the vehicle, but when a relatively small load is applied to the extent that the front bumper and the bumper net are plastically deformed, the rod-like object (for example, a pedestrian's leg) is vertically parallel. When the load is applied to the side member in contact with the side member, the side member that is the main skeleton of the front part of the vehicle has high rigidity, and even if the leg part contacts the front surface, it is difficult to absorb the load by the side member. There is a risk that a relatively large load is applied to the leg portion.

Therefore, some conventional vehicles are provided with a resin bumper net at the front of the vehicle and absorb the relatively small load from the front of the vehicle using the structure of the bumper net (for example, Patent Document 1 to Patent Document 4). In this conventional structure of the front part of the vehicle, the upper and lower mounting parts of the bumper net are used as fulcrums, and the center part in the vertical direction is bent toward the rear of the vehicle body so as to absorb a relatively small load from the front of the vehicle. It has become.

JP 10-44890 A JP 2008-87615 A JP 2004-153832 A JP 2003-104142 A

However, in the conventional vehicle front structure described above, the main function of the bumper net is to hold the front bumper, etc., so it is difficult to efficiently absorb a relatively small load from the front of the vehicle. The problem was that the typical load could not be reduced.

The present invention has been made in view of such a situation, and the purpose thereof is when a relatively small load is applied from the front of the vehicle even if the absorber has a vertically long shape corresponding to the side member. It is possible to evenly deform around the attachment part to the side member, efficiently absorb the load from the front of the vehicle while holding a vertically long rod-like object vertically, and reduce the local load. It is to provide a possible vehicle front absorber structure.

In order to solve the above-described problems of the related art, the present invention provides a front end surface of the side member at a front portion of the vehicle in which a bumper member is not provided in front of the side member extending along the vehicle front-rear direction. Is mounted with a box-shaped absorber with a front opening that protrudes toward the rear of the vehicle, and the bottom surface of the absorber located at the rear of the vehicle is opposed to the central bottom surface portion disposed at the central portion with the central bottom surface portion interposed therebetween. And the opposite bottom surface portion formed wider than the center bottom surface portion, and the rear surface of the center bottom surface portion is for attachment to the side member and toward the rear of the vehicle Protruding portions are provided, and the side wall portion of the absorber has a cross-sectional shape extending substantially similar to the central bottom surface portion from the central bottom surface portion and the opposed bottom surface portion toward the front of the vehicle. A flat front surface portion is provided around the vehicle front side of the side wall portion of the absorber, and a notch portion extending in the vehicle front-rear direction is separated from the central bottom surface portion on the side wall portion. In the position.

Further, in the present invention, the cutout portion is provided from the opposed bottom surface portion to a front surface portion around the vehicle front side of the side wall portion, and is arranged in at least four directions radially away from the central bottom surface portion. Yes.

As described above, the absorber structure of the front part of the vehicle according to the present invention is formed on the front end surface of the side member at the front part of the vehicle in which the bumper member is not provided in front of the side member extending along the vehicle front-rear direction. Is mounted with a box-shaped absorber with a front opening that protrudes toward the rear of the vehicle, and the bottom surface of the absorber located at the rear of the vehicle is opposed to the central bottom surface portion disposed at the central portion with the central bottom surface portion interposed therebetween. And the opposite bottom surface portion formed wider than the center bottom surface portion, and the rear surface of the center bottom surface portion is for attachment to the side member and toward the rear of the vehicle Protruding portions that extend are provided, and the side wall portion of the absorber extends from the central bottom surface portion and the opposed bottom surface portion toward the front of the vehicle so that the cross-sectional shape extends substantially similar to the central bottom surface portion. A front surface portion having a flat shape is provided around the vehicle front side of the side wall portion of the absorber, and a notch portion extending in the vehicle front-rear direction is separated from the center bottom surface portion on the side wall portion. Is provided.
For this reason, in the absorber structure of the present invention, when the absorber receives a relatively small load from the front of the vehicle, the side wall portion of the absorber is uniformly deformed around the center bottom surface portion and the opposed bottom surface portion. . Therefore, according to the absorber structure of the present invention, the absorber is formed so as to be long in the vertical direction corresponding to the front end surface of the side member having a vertically long shape along the leg portion of the pedestrian that is the rod-shaped object of the load generation source. However, while holding a vertically long rod-like object vertically, the load from the front of the vehicle can be evenly distributed in the vertical direction and absorbed efficiently, and the local load on the pedestrian's legs can be absorbed. Can be reduced.

Further, in the absorber structure of the present invention, the cutout portion is provided from the opposed bottom surface portion to a front surface portion around the vehicle front side of the side wall portion, and is radially at least in four directions away from the central bottom surface portion. Since it is disposed, the entire absorber is crushed reliably and evenly by the input load from the front of the vehicle, and the amount of load absorbed from the front of the vehicle can be improved.

1 is a perspective view showing a vehicle front portion to which an absorber structure according to an embodiment of the present invention is applied. FIG. 2 is a front view showing a state in which a front bumper is removed at a front portion of the vehicle in FIG. 1 and an absorber is attached to a front end surface of a side member. It is a side view which shows the state which attached the absorber to the front-end surface of the side member in FIG. BRIEF DESCRIPTION OF THE DRAWINGS The absorber of the structure which concerns on embodiment of this invention is shown, (a) is the perspective view seen from the diagonally upward of the vehicle back, (b) is the perspective view seen from the diagonally upward of the vehicle front. It is a front view which shows the absorber of the structure which concerns on embodiment of this invention. It is a front view which shows the absorber of the structure which concerns on the modification of embodiment of this invention.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.
1 to 5 show an absorber structure for a front portion of a vehicle according to an embodiment of the present invention.

As shown in FIGS. 1 to 3, the vehicle front portion 1 to which the absorber structure according to the embodiment of the present invention is applied mainly extends along the vehicle front-rear direction and on both the left and right sides in the vehicle width direction. A pair of left and right side members 2 arranged at an interval, and a resin bumper net 3 and a front bumper 4 positioned in front of the vehicle of these side members 2 are provided. However, a bumper member is not provided in front of the side member 2 in the vehicle front portion 1 of the present embodiment. As shown in FIG. 1, the bumper net 3 is provided on the rear side of the front bumper 4 and has a function of receiving a relatively small load from the front of the vehicle.

As shown in FIG. 2, a hood lock member 5 extending in the vehicle width direction is disposed on the upper side in the vicinity of the front end of the side member 2, and in the vehicle width direction on the lower side in the vicinity of the front end of the side member 2. A radiator support lower member 6 extending in the direction is arranged, and the lower portions of the front end portions of the side members 2 located on both the left and right sides are connected by the radiator support lower member 6 and the like. The heat exchanger such as the radiator 7 disposed in the vehicle front portion 1 is supported by a hood lock member 5 and a radiator support lower member 6. The hood lock member 5 and the radiator support lower member 6 are The front portion 1 is connected by a hood lock member brace 8 extending in the vehicle vertical direction near the center in the vehicle width direction.

The side member 2 of the present embodiment is a rigid member that constitutes the main skeleton of the vehicle front portion 1. As shown in FIGS. 2 and 3, a planar front end surface 9 extending in the vertical direction is provided on the vehicle front side of each side member 2, and the front end surface 9 is a rod-shaped object (load generation source) For example, it is formed in a vertically long shape along the pedestrian's leg). As shown in FIGS. 2 to 5, absorbers 10 and 20, which are resin load absorbing materials, are respectively attached to the upper and lower positions of the front end surface 9 of the side members 2.

As shown in FIGS. 2 to 5, the upper absorber 10, which is a characteristic part of the present embodiment, is formed in a box shape with a front opening protruding toward the rear of the vehicle. The bottom surface of the upper absorber 10 located behind the vehicle is disposed so as to be opposed to the center bottom surface portion 11 disposed at the center portion and the center bottom surface portion 11 with the center bottom surface portion 11 interposed therebetween. It has opposing

bottom surface portions

12 and 13 formed to have a wide length in the width direction.
On the rear surface side (rear surface side) of the center bottom surface portion 11, a tapered protrusion 14 is provided for attachment to the front end surface 9 of the side member 2 and extends toward the rear of the vehicle. For this reason, the front end surface 9 of the side member 2 is provided with an insertion hole (not shown) for inserting the projection 14, and the upper absorber is inserted by inserting the projection 14 into the insertion hole. 10 is attached to the front end surface 9 of the side member 2 in a state of being overlapped.

As shown in FIGS. 4 and 5, the four

side walls

15, 16, 17, 18 on the upper, lower, left and right sides of the upper absorber 10 have a cross-sectional shape from the center bottom surface portion 11 and the opposed

bottom surface portions

12, 13 toward the front of the vehicle. Is extended and arranged in a substantially similar shape to the central bottom surface portion 11. That is, the upper and lower

side wall portions

15 and 16 are formed in a curved shape in which the width in the left-right direction on the vehicle front side is larger than that on the vehicle rear side, and the central portion in the vehicle front-rear direction swells outward. The left and right

side wall portions

17 and 18 are longer in the vertical direction on the vehicle front side than on the vehicle rear side, the middle portion in the vehicle vertical direction is recessed inward, and the upper and lower portions bulge outward. It is formed in a curved shape. A planar front portion 10 a is provided around the

side wall portions

15, 16, 17, and 18 of the upper absorber 10 on the vehicle front side so as to protrude in the vertical direction and the horizontal direction. The upper absorber 10 has a quadrangular shape when viewed from the front when viewed from the front of the vehicle.

In addition, a notch portion 19 extending in the vehicle front-rear direction is provided at a position away from the center bottom surface portion 11 at each adjacent corner portion of the

side wall portions

15, 16, 17, 18 of the upper absorber 10. That is, the notch portion 19 is provided from the opposed

bottom surface portions

12 and 13 to the front surface portion 10a around the vehicle front side of each of the

side wall portions

15, 16, 17 and 18, and is opposed to the central bottom surface portion 11. The

portions

12 and 13 are arranged in at least four directions radially from the corners. As a result, when the upper absorber 10 receives a load from the front of the vehicle, the entire upper absorber 10 is uniformly crushed.

On the other hand, below the upper absorber 10 of the present embodiment, a lower absorber 20 is integrally formed continuously along the vehicle vertical direction. For this reason, a connecting plate 30 that connects the upper and

lower absorbers

10 and 20 is formed integrally with the upper and

lower absorbers

10 and 20 between the upper and

lower absorbers

10 and 20, and is configured as one component. Accordingly, the upper and

lower absorbers

10 and 20 and the connecting plate 30 are formed in a continuous shape that is long in the vertical direction corresponding to the front end surface 9 of the side member 2.

The lower absorber 20 is configured in substantially the same manner as the upper absorber 10 except that a mounting hole 24 is provided instead of the protruding portion 14, and has a box shape with a front opening protruding toward the rear of the vehicle. Is formed. The bottom surface of the lower absorber 20 located behind the vehicle is disposed so as to be opposed to the center bottom surface portion 21 disposed at the center portion and the center bottom surface portion 21 between the center bottom surface portion 21 and the center bottom surface portion 21. It has opposing

bottom surface portions

22 and 23 formed to have a wide length in the vehicle width direction.
As shown in FIGS. 4 and 5, the four

side walls

25, 26, 27, 28 on the upper, lower, left, and right sides of the lower absorber 20 are cross-sectioned from the center bottom surface 21 and the opposed

bottom surface portions

22, 23 toward the front of the vehicle. The shape is arranged so as to extend substantially similar to the center bottom surface portion 21. That is, the upper and lower

side wall portions

25 and 26 are formed in a curved shape in which the width in the left-right direction on the vehicle front side is larger than that on the vehicle rear side, and the central portion in the vehicle front-rear direction bulges outward. Further, the left and right

side wall portions

27 and 28 are longer in the vertical direction on the vehicle front side than on the vehicle rear side, the middle portion in the vehicle vertical direction is recessed inward, and the upper and lower portions bulge outward. It is formed in a curved shape. A planar front portion 20a is provided around the

side wall portions

25, 26, 27, and 28 of the lower absorber 20 on the vehicle front side so as to project in the vertical direction and the horizontal direction. The lower absorber 20 has a quadrangular shape when viewed from the front when viewed from the front of the vehicle.

In addition, a notch portion 29 extending in the vehicle front-rear direction is provided at a position away from the center bottom surface portion 21 at each adjacent corner portion of the

side wall portions

25, 26, 27, 28 of the lower absorber 20. That is, the notch 29 is provided from the opposed

bottom surface portions

22, 23 to the front surface portion 20 a around the vehicle front side of the

side wall portions

25, 26, 27, 28, and is opposed to the central bottom surface portion 21. At least four directions are arranged radially from the corners of the

portions

22 and 23, respectively. Thus, when the lower absorber 20 receives a load from the front of the vehicle, the entire lower absorber 20 is uniformly crushed.
Further, the attachment hole 24 is formed in the center bottom surface portion 21 and the opposed

bottom surface portions

22 and 23 for attachment to the front end surface 9 of the side member 2. For this reason, the front end surface 9 of the side member 2 is provided with an engaging projection (not shown) that is inserted into and engaged with the mounting hole 24, and the engaging protruding portion is inserted into the mounting hole 24. Thus, the lower absorber 20 is attached in a state of being superimposed on the front end surface 9 of the side member 2. The attachment hole 24 is formed in a long hole shape extending from the right side wall portion 28 in the vehicle width direction so that the engagement protrusion can be easily inserted.

Next, a rod-like object (for example, a pedestrian's leg) (not shown) hits the front portion 1 of the vehicle having the absorber structure according to the embodiment of the present invention from the front of the vehicle, as indicated by an arrow F in FIG. Next, the deformation state of the upper and

lower absorbers

10 and 20 when the upper and

lower absorbers

10 and 20 receive the load of the rod-shaped object will be described.
When a load from the front of the vehicle is applied to the

front surface portions

10a, 20a of the upper and

lower absorbers

10, 20, the upper and

lower absorbers

10, 20 are deformed by the load from the front of the vehicle, and the four

side wall portions

15, 16, 17, 18, 25 , 26, 27, 28 swell outward and are crushed and destroyed. Accordingly, the

front surface portions

10a and 20a of the upper and

lower absorbers

10 and 20 move toward the rear of the vehicle and come into contact with and overlap the front end surface 9 of the side member 2. At this time, the four

side wall portions

15, 16, 17, 18, 25, 26, 27, and 28 are provided with the center

bottom surface portions

11, 21 and the opposed

bottom surface portions

12, 13, 22, Centering on 23, it is crushed simultaneously and equally. As a result, the upper and

lower absorbers

10 and 20 are completely crushed by the load from the front of the vehicle while holding the legs of the pedestrian, which is a rod-like object, vertically, and efficient load absorption is possible.

As described above, in the absorber structure of the vehicle front portion 1 according to the embodiment of the present invention, it is formed in a box shape with a front opening protruding toward the rear of the vehicle, and corresponds to the front end surface 9 of the side member 2 in the vertical direction. The upper and

lower absorbers

10 and 20 made of resin having a long and continuous shape are attached to the front end surface 9 of the side member 2, and the bottom surface of the upper and

lower absorbers

10 and 20 positioned at the rear of the vehicle is the center bottom surface portion disposed at the center. 11, 21 and opposed

bottom surface portions

12, 13, 22, 23 that are arranged to face each other with the center

bottom surface portions

11, 21 sandwiched therebetween and are wider than the center

bottom surface portions

11, 21, A protrusion 14 extending toward the rear of the vehicle is provided on the rear surface of the center bottom surface portion 11 of the absorber 10, and a mounting hole 24 is provided in the center bottom surface portion 21 of the lower absorber 20. The four

side walls

15, 16, 17, 18, 25, 26, 27, and 28 have a cross-sectional shape from the center

bottom surface portions

11, 21 and the opposed

bottom surface portions

12, 13, 22, 23 toward the front of the vehicle. A flat surface around the vehicle front side of the

side wall portions

15, 16, 17, 18, 25, 26, 27, 28 of the upper and

lower absorbers

10, 20 is arranged extending in a similar shape to the central

bottom surface portions

11, 21. The

front surface portions

10a and 20a are provided, and the

side wall portions

15, 16, 17, 18, 25, 26, 27 and 28 are provided with

notches

19 and 29 extending in the vehicle front-rear direction and the center

bottom surface portions

11 and 21. It is provided in a position away from Therefore, when the upper and

lower absorbers

10 and 20 are deformed by a load from the front of the vehicle due to the rod-like object, the

side wall portions

15, 16, 17, 18, 25, 26, 27 and 28 are evenly crushed and destroyed. Therefore, according to the absorber structure of the present invention, the upper and

lower absorbers

10 and 20 are elongated vertically so as to correspond to the front end surface 9 of the side member 2 having a vertically long shape along the leg portion of the pedestrian that is a rod-like object. Even if it is formed, it can absorb the load from the front of the vehicle evenly in the vertical direction while holding the pedestrian's legs vertically, etc., and absorb it efficiently, and it can locally absorb the pedestrian's legs. Load can be reduced.

While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.
For example, in the above-described embodiment, the two

absorbers

10 and 11 are provided above and below the front end surface 5 of the side member 2, but only the upper absorber 10 may be provided depending on the applicable vehicle type. In the above-described embodiment, the front shape of the upper absorber 10 is formed in a quadrangle, but as shown in FIG. 6, the front shape of the upper absorber 50 may be formed in a vertically long ellipse. . In this case, the opposed

bottom surface portions

12 and 13 disposed to face each other with the central bottom surface portion 11 interposed therebetween are disposed in the vertical direction.

DESCRIPTION OF SYMBOLS 1 Vehicle front part 2 Side member 3 Bumper net 4 Front bumper 9 Front end surface 10 Upper absorber 10a Front part 11 Center bottom face

part

12, 13 Opposite bottom face part 14 Protrusion part 15-18 Side wall part 19 Notch part

Claims

In the front part of the vehicle in which the bumper member is not provided in front of the vehicle of the side member extending along the vehicle longitudinal direction,
A box-shaped absorber with a front opening protruding toward the rear of the vehicle is attached to the front end surface of the side member,
The bottom surface of the absorber located at the rear of the vehicle is opposed to the central bottom surface portion disposed at the center portion, and is opposed to the central bottom surface portion, and is formed wider than the central bottom surface portion. The rear surface of the center bottom surface portion is provided with a protrusion for attaching to the side member and extending toward the rear of the vehicle,
The side wall portion of the absorber is disposed so that a cross-sectional shape extends from the center bottom surface portion and the opposed bottom surface portion toward the front of the vehicle so as to be substantially similar to the center bottom surface portion, and the side wall of the absorber on the front side of the vehicle A flat front surface portion is provided around the side, and a cutout portion extending in the vehicle front-rear direction is provided at a position away from the center bottom surface portion in the side wall portion. Absorber structure at the front of the vehicle.
The cutouts are provided from the opposed bottom surface to the front surface around the vehicle front side of the side wall, and are arranged radially in at least four directions away from the central bottom surface. The absorber structure of the vehicle front part of Claim 1.