JP2009040299A - Vehicle front part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle front part structure capable of certainly and sufficiently performing transmission of collision load to a vehicle skeleton member arranged at a front part of the vehicle at collision of a front side of the vehicle. <P>SOLUTION: A stabilizer 22 is arranged at a front side of the vehicle at both left and right side front end parts of a suspension member 16 fixed to a lower part of a front side member 12, and a stabilizer catcher 30 is provided on both left and right side front end parts of the suspension member 16. At collision of a front surface of the vehicle, the stabilizer 22 input with collision load from a front side of the vehicle is received by the stabilizer catcher 30, and the collision load is transmitted to the front side member 12 and the suspension member 16. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle front structure.

  2. Description of the Related Art A vehicle front structure that is intended to absorb a collision load at the time of a vehicle front collision at a vehicle front is known (see, for example, Patent Document 1).

However, I think that the EA (energy absorption) performance at the time of a vehicle front collision can be obtained even with the above structure. For example, when the collision body is a rigid body elongated in the vehicle vertical direction such as a pole and is an aluminum body, etc. Further, the load transmission from the bumper to the vehicle skeleton member such as the front side member may not be sufficiently performed, and the collision load may not be sufficiently absorbed in the front portion of the vehicle.
Japanese Patent Laid-Open No. 10-230869

  In consideration of the above-described facts, an object of the present invention is to provide a vehicle front structure that can ensure a transmission performance of a collision load to a vehicle skeleton member disposed in a vehicle front portion at the time of a vehicle front collision.

  The vehicle front portion structure according to claim 1 is disposed so as to intersect a pair of left and right vehicle skeleton members extending in the vehicle front-rear direction at the vehicle front portion and the pair of left and right vehicle skeleton members in a vehicle plan view. And a pair of left and right load transmitting means disposed on the vehicle rear side of the stabilizer, receiving the stabilizer to which a load is input from the vehicle front side, and transmitting the load to the left and right vehicle skeleton members; It is characterized by having.

  In the vehicle front structure according to the first aspect, the pair of left and right vehicle skeleton members extend in the vehicle front-rear direction and the stabilizer intersects the left and right vehicle skeleton members in the vehicle plan view. It is installed. A pair of left and right load transmitting means are disposed on the rear side of the stabilizer.

  The pair of left and right load transmitting means receives the stabilizer and transmits the load to the vehicle skeleton member when a load is input to the stabilizer from the front side of the vehicle. Therefore, for example, even when the collision body at the time of a vehicle front collision is a rigid body elongated in the vehicle vertical direction such as a pole and is an aluminum vehicle body, the vehicle skeleton member disposed in the front portion of the vehicle Improve impact load transmission performance.

  The vehicle front structure according to claim 2 is the vehicle front structure according to claim 1, wherein the vehicle skeleton member is a front side member, and extends in the vehicle width direction at the vehicle front. It has suspension members fixed to the left and right front side members on both the left and right sides, and the load transmitting means is provided at the front end portions on the left and right sides of the suspension member.

  In the vehicle front portion structure according to claim 2, in the vehicle front portion, the pair of left and right front side members extend in the vehicle front-rear direction, and the left and right sides of the suspension member extending in the vehicle width direction are a pair of left and right fronts. It is fixed to the side member.

  Load transmission means are provided at the left and right front ends of the suspension member. When a collision load is input to the stabilizer from the front side of the vehicle due to a vehicle frontal collision, the stabilizer is moved to the left and right front ends of the suspension member. The collision load is transmitted to not only the front side member but also the suspension member.

  Therefore, the EA performance in the front part of the vehicle at the time of a vehicle front collision can be further improved.

  The vehicle front structure according to claim 3 is a pair of left and right first vehicle skeleton members extending in the vehicle front-rear direction at the vehicle front portion, and extending in the vehicle width direction at the vehicle front portion. The second vehicle skeleton member fixed to the first vehicle skeleton member and the front side of the left and right front ends of the second vehicle skeleton member intersect the left and right first vehicle skeleton members in a vehicle plan view. The stabilizer is disposed in the manner described above, and is provided at the left and right front end portions of the second vehicle skeleton member. The stabilizer receives the load from the vehicle front side and receives the load from the first vehicle skeleton member and the second vehicle skeleton member. And a pair of left and right load transmitting means for transmitting to at least one of the two vehicle skeleton members.

  In the vehicle front structure according to claim 3, in the vehicle front portion, the pair of left and right first vehicle skeleton members extend in the vehicle front-rear direction, and the left and right sides of the second vehicle skeleton member extend in the vehicle width direction. The left and right first vehicle frame members are fixed. A stabilizer is disposed on the vehicle front side of the left and right front ends of the second vehicle skeleton member so as to intersect the left and right first vehicle skeleton members in a vehicle plan view.

  Load transmitting means are provided at the left and right front end portions of the second vehicle skeleton member. When a collision load is input to the stabilizer from the vehicle front side due to a vehicle front collision, the stabilizer is connected to the second vehicle skeleton member. The collision load is received by the left and right front ends of the member, and the collision load is transmitted to at least one of the first vehicle skeleton member and the second vehicle skeleton member.

  Therefore, it is possible to ensure the transmission performance of the collision load to the pair of left and right first vehicle skeleton members and the second vehicle skeleton member disposed in the front portion of the vehicle at the time of a vehicle front collision.

  As described above, according to the present invention, it is possible to provide a vehicle front portion structure that can ensure the transmission performance of a collision load to a vehicle skeleton member disposed in the vehicle front portion at the time of a vehicle front collision.

Next, an embodiment of a vehicle front structure according to the present invention will be described with reference to FIGS.
In the figure, the arrow FR indicates the vehicle front direction, the arrow UP indicates the vehicle upward direction, and the arrow IN indicates the vehicle width inside direction.

  As shown in FIGS. 1 to 3, at the front portion of the vehicle 10, a pair of left and right front side members (a vehicle skeleton member, a first vehicle skeleton member) 12 extend in the vehicle front-rear direction. A crash box 14 is coupled to the front end portion of the front side member 12, and the front end portions of the left and right crash boxes 14 are coupled to each other in the vehicle width direction by a bumper inn hose 15.

  In addition, suspension members (second vehicle skeleton members, subframes) 16 are disposed below the left and right front side members 12 in the vehicle. The suspension member 16 includes a pair of left and right side portions 18 fixed to the lower portion of the front side member 12 by welding or the like, and a cross portion 20 (see FIG. 3) that connects the pair of left and right side portions 18 in the vehicle width direction. I have. These vehicle skeleton members are made of aluminum for the purpose of weight reduction and the like.

  Each side portion 18 is disposed so as to overlap with each front side member 12 in plan view (viewed in the vehicle vertical direction). Further, the front end portion of each side portion 18 is disposed on the vehicle rear side with respect to the front end portion of the front side member 12.

  Further, stabilizers 22 bent at various places are arranged on the vehicle lower side of the left and right front side members 12 so as to intersect (substantially orthogonal) the pair of left and right front side members 12 in plan view. A central portion in the axial direction of the stabilizer 22 is a crank portion 22A bent in a crank shape, and both sides thereof are linear support portions 22B that are rotatably supported by the lower surface 12A of the front side member 12 via a stabilizer bracket 24. Further, both sides thereof are connecting portions 22C connected to a lower arm (not shown) via a stabilizer link (not shown). The stabilizer 22 is configured to reduce the difference between the rotational positions of the pair of lower arms and reduce the difference between the vertical positions of the pair of front wheels.

  The stabilizer bracket 24 is bent in an L shape and is fixed to the lower portion of the front side member 12, and a U-shaped bracket fastened to a lower wall portion 24D (described later) of the base portion 24A with a bolt. 24B, and a semicircular rubber bush 24C fitted between the bracket portion 24B and the base portion 24A.

  The base portion 24A includes a lower wall portion 24D disposed to face the lower surface 12A of the front side member 12, and a side wall portion 24E welded to the side surface 12B of the front side member 12. The lower wall portion 24D is configured in a rectangular plate shape. Further, the side wall portion 24E has a concave upper central portion, and is formed with a bead B (fragile portion, low-rigidity portion) extending obliquely rearward and downward from the upper central portion. Further, a fixing portion 24F extending obliquely rearward and upward from the bead B is formed on the side wall portion 24E, and this fixing portion 24F is welded to the side surface 12B.

  Also, flanges 24G that are bolted to the lower wall portion 24D are formed at both ends of the bracket portion 24B. The flange 24G is juxtaposed in the vehicle longitudinal direction. Further, a circular hole 24H is penetrated through the rubber bush 24C in the vehicle width direction. The support portion 22B of the stabilizer 22 is rotatably fitted in the circular hole 24H.

  Here, the support portion 22B and the stabilizer bracket 24 are arranged so that a part (or the whole) of the support portion 22B and the front end portion of the side portion 18 are overlapped in plan view. A stabilizer catcher 30 as load transmitting means is provided at the front end of the side portion 18. The stabilizer catcher 30 is generally inclined toward the vehicle lower side toward the vehicle front side, and the front end portion of the upper surface 30A faces the bracket portion 24B through a slight gap, and the upper surface 30A is The inclined surface is inclined toward the vehicle upper side from the front end portion to the rear end portion.

  Next, the operation in this embodiment will be described.

  As shown in FIG. 4, when a collision load is input from the front side of the vehicle to the bumper inhose 15 due to a vehicle frontal collision, first, the bumper innose 15 passes through the left and right crash boxes 14. The collision load is transmitted to the left and right front side members 12.

  In this case, for example, when the collision body 1 is a rigid body that is elongated in the vehicle vertical direction such as a pole as shown in the drawing and the collision load is excessive, the collision body 1 is relative to the vehicle 10. Thus, the vehicle moves rearward and contacts the stabilizer 22, or an object interposed between the collision body 1 and the stabilizer 22 contacts the stabilizer 22.

  As shown in FIG. 5, the collision load input to the stabilizer 22 from the front side of the vehicle causes the bead B to be crushed and deformed, and the bracket portion 24B of the stabilizer bracket 24 is applied to the upper surface 30A of the stabilizer catcher 30. By making contact, the lower wall portion 24D of the base portion 24A is displaced obliquely rearward and upward together with the bracket portion 24B supporting the stabilizer 22.

  Here, since the stabilizer 22 is a rigid body, the collision load input to the stabilizer 22 is transmitted to the front side member 12 and the side portion 18 of the suspension member 16 as indicated by a dotted arrow in the figure.

  Therefore, for example, even when the collision load is not transmitted from the bumper-in hose 15 to the front side member 12 at the time of a vehicle front collision as in the present embodiment, it is disposed at the front portion of the vehicle 10. The transmission performance of the collision load to the left and right front side members 12 and the suspension member 16 can be ensured.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It is clear to the contractor. For example, in this embodiment, the stabilizer catcher 30 as the load transmitting means is provided at the left and right front end portions of the suspension member 16, but the stabilizer catcher 30 is attached to the separate member 17 of the suspension member 16 as shown in FIG. It may be provided.

  In the present embodiment, the collision load input from the front of the vehicle to the stabilizer 22 is transmitted to the front side member 12 and the suspension member 16. For example, only the front side member 12 is configured as shown in FIG. Alternatively, it can be set as appropriate, for example, by transmitting only to the suspension member 16. It is preferable to preferentially ensure the load transmission performance to the front side member 12, and it is more preferable if the load transmission performance to the suspension member 16 can also be ensured.

It is a perspective view which shows the vehicle front part structure which concerns on one Embodiment of this invention. It is a side view showing the vehicle front part structure concerning one embodiment of the present invention. It is a top view which shows the vehicle front part structure which concerns on one Embodiment of this invention. It is a top view which shows the effect | action of the vehicle front part structure which concerns on one Embodiment of this invention. It is a side view which shows the effect | action of the vehicle front part structure which concerns on one Embodiment of this invention. It is a side view which shows the modification of the vehicle front part structure which concerns on one Embodiment of this invention.

Explanation of symbols

12 Front side member (vehicle frame member, first vehicle frame member)
16 Suspension member (second vehicle frame member)
22 Stabilizer 30 Stabilizer catcher (load transmission means)

Claims (3)

A pair of left and right vehicle skeleton members extending in the vehicle front-rear direction at the front of the vehicle;
A stabilizer disposed to intersect the pair of left and right vehicle skeleton members in a vehicle plan view;
A pair of left and right load transmission means disposed on the vehicle rear side of the stabilizer, receiving the stabilizer to which a load is input from the vehicle front side, and transmitting the load to the vehicle skeleton member;
A vehicle front structure characterized by comprising: The vehicle skeleton member is a front side member,
The vehicle has a suspension member that extends in the vehicle width direction at the front of the vehicle and is fixed to the left and right front side members on both the left and right sides.
2. The vehicle front structure according to claim 1, wherein the load transmission means is provided at front ends of both left and right sides of the suspension member. A pair of left and right first vehicle skeleton members extending in the vehicle front-rear direction at the front of the vehicle;
A second vehicle skeleton member that extends in the vehicle width direction at the front of the vehicle and is fixed to the left and right first vehicle skeleton members on both left and right sides;
A stabilizer disposed on the vehicle front side of the left and right front ends of the second vehicle skeleton member so as to intersect the left and right first vehicle skeleton members in a vehicle plan view;
Provided at the left and right front end portions of the second vehicle skeleton member, receives the stabilizer to which a load is input from the front side of the vehicle, and transmits the load to at least one of the first vehicle skeleton member and the second vehicle skeleton member. A pair of left and right load transmitting means,
A vehicle front structure characterized by comprising:

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