JP2011148421A - Front structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the stiffness of a front part of a vehicle, and also to more efficiently absorb a collision load received by the front part in head-on collision. <P>SOLUTION: A front structure 1 of a vehicle includes: a pair of right and left front side members 2A, 2B extending in the front-back direction in both right and left sides of the front part of the vehicle; and a front sub-frame 3 connected with the side members 2A, 2B and extending in the vehicle-width direction. In the front structure 1, a pair of right and left reinforcement members 4A, 4B connecting the side members 2A, 2B with the sub-frame 3, are provided, while being intersected with each other so as to allow their turning each other with an intersecting part in the head-on collision. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a front structure of a vehicle.

  In order to improve the steering stability of the vehicle, it is effective to install a reinforcing member that suppresses torsion of the vehicle body between the skeleton members of the vehicle. As such a reinforcing member, a member in which a pair of left and right reinforcing members are installed crossing between a front frame extending in the front-rear direction on both left and right sides of the front portion of the vehicle and a cross member extending in the vehicle width direction is known. (For example, refer to Patent Document 1).

JP 2000-159145 A

  However, in the structure described in Patent Document 1, the rigidity by the reinforcing member is low. Further, it is required to more efficiently absorb the collision load received by the front part of the vehicle.

  The present invention has been made in view of such circumstances, and improves the rigidity of the front portion of the vehicle, and can more efficiently absorb the collision load received by the front portion of the vehicle during a front collision. The purpose is to provide.

  The present invention is a vehicle front structure comprising a pair of left and right front side members extending in the front-rear direction on the left and right sides of the front portion of the vehicle, and a front subframe coupled to the front side member and extending in the vehicle width direction, A pair of left and right reinforcing members that connect the front side member and the front sub-frame are provided, the reinforcing members intersect with each other, and are coupled so as to allow rotation at the intersecting portion at the time of a front collision. It is said.

  According to such a front structure of the vehicle, the rigidity is increased because the reinforcing members are connected so as to allow the rotation, and in the case of a front collision, a pair of left and right installed to cross each other. When load is transmitted to the front side member through the reinforcing member, the scissors open at the intersection where the reinforcing member is connected (so that the section where the reinforcing member is installed shortens in the front-rear direction) Because they rotate relative to each other, there is no resistance against the input load so that the reinforcing member is stretched. Therefore, the section where the reinforcing member is installed has an adverse effect on other parts without being inhibited from deformation. Energy can be absorbed efficiently. That is, the balance between the rigidity and energy absorption of the front structure of the vehicle is good.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the rigidity of a vehicle front part, the front part structure of the vehicle which can absorb the collision load which a vehicle front part receives at the time of a front collision more efficiently can be provided.

It is a bottom view of the front part structure of the vehicle of the present invention. It is a bottom view which shows the change at the time of the front collision of the reinforcement member which concerns on this invention.

  Hereinafter, a preferred embodiment of a vehicle front structure according to the present invention will be described in detail with reference to the drawings. In this specification, the direction in which the vehicle is moving forward is defined as “front”, and terms such as “front”, “rear”, “left”, “right” and the like are used. .

  FIG. 1 is a bottom view of a vehicle front structure 1 according to the present invention. A front structure 1 of a vehicle includes a pair of left and right front side members 2A and 2B extending in the front-rear direction on both left and right sides of the front portion of the vehicle, and a front subframe coupled to the front side members 2A and 2B and extending in the vehicle width direction. 3 is provided.

  The front structure 1 includes a pair of left and right reinforcing members 4A and 4B that connect the front side members 2A and 2B and the front subframe 3, that is, a rear side of the front subframe 3 in the front side member 2A on the left side of the vehicle. 4A, the reinforcement member 4A that connects the right end portion of the front subframe 3, and the reinforcement that connects the rear side portion of the front side member 2B on the right side of the vehicle with respect to the front subframe 3 and the left end portion of the front subframe 3. And a member 4B. These reinforcing members 4A and 4B are configured to intersect with each other, and by such an intersection, the vehicle body is prevented from being twisted to improve the steering stability of the vehicle. The reinforcement members 4A and 4B may be connected to the front side members 2A and 2B and the front subframe 3 by welding or using bolts or the like.

  Here, particularly in the present embodiment, the reinforcing members 4A and 4B are coupled so as to allow the rotation of the reinforcing members 4A and 4B at the intersecting portion at the time of the front collision. The connection of the intersecting portions of the reinforcing members 4A and 4B may be rotated, and for example, a connection using a pin can be used. Further, at the intersecting portions to be coupled, the reinforcing members 4A and 4B may be in contact with each other, or may be coupled via a member such as an elastic spacer.

  The reinforcing members 4A and 4B of the present embodiment are connected to the front side members 2A and 2B with an inclination with respect to the front-rear direction of the vehicle. Usually, when the inclination angle of the reinforcing members 4A and 4B is increased, the rigidity of the vehicle with respect to the front collision is lowered. Here, since the reinforcing members 4A and 4B of the present embodiment are connected to each other at the intersections, the rigidity of the vehicle is improved. However, since the reinforcing members 4A and 4B are allowed to rotate at the intersections, the rigidity of the vehicle with respect to the front collision does not become too high compared to the case where the reinforcing members 4A and 4B are connected to each other. The rotating reinforcing members 4A and 4B can reduce the reaction force in the front-rear direction of the vehicle at the time of the front collision, and can efficiently absorb the energy at the time of the front collision.

  FIG. 2 is a bottom view showing a change in the front collision of the reinforcing members 4A and 4B according to the present embodiment. According to the reinforcing members 4A and 4B of the present embodiment, when the vehicle collides forward, a load is transmitted from the front subframe 3 to the front side members 2A and 2B via the reinforcing members 4A and 4B. At this time, the reinforcing members 4A and 4B rotate with respect to each other so that the scissors open at the connected intersection (so that the section X where the reinforcing members 4A and 4B are installed becomes shorter in the front-rear direction). Since the reinforcing members 4A and 4B warp toward the lower side (the front side of the paper in FIG. 2), the upper side, or the horizontal direction of the vehicle, the reinforcing members 4A and 4B resist the input load so as to stretch. There is no. Therefore, the section X in which the reinforcing members 4A and 4B are installed can efficiently absorb energy without adversely affecting other parts without being inhibited from deformation.

  In another embodiment, when the reinforcing members 4A and 4B are connected to the front side members 2A and 2B by friction bonding using a connecting member such as a bolt, the front side members 2A and 2B However, it is good also as a structure which has a long hole from which connecting members, such as a volt | bolt, can move. When the connecting part is a long hole and the reinforcing members 4A and 4B are connected to one end of the long hole, the reinforcing members 4A and 4B slide and move rearwardly in the long hole when the vehicle collides forward. It can absorb energy. Even in this case, energy can be absorbed by the reinforcing members 4A and 4B warping toward the lower side of the vehicle as in the above embodiment.

  As described above, according to this embodiment, the intersecting portions of the reinforcing members 4A and 4B that are coupled to the front side members 2A and 2B and the front subframe 3 and intersect each other are coupled so as to allow rotation. Therefore, it is possible to increase the rigidity of the front portion of the vehicle, and more efficiently absorb the collision load received by the front portion of the vehicle without causing the reinforcement members 4A and 4B to be stretched during the front collision. Can do.

  The reinforcing members 4A and 4B have different cross-sectional shapes and materials depending on the structure of the other part of the vehicle front so that the energy absorption capacity of the section X where the reinforcing members 4A and 4B are installed is further improved. You can choose. Further, the reinforcing members 4A and 4B according to the present embodiment function effectively both at the time of frontal collision and at the time of offset collision.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle front part structure, 2A, 2B ... Front side member, 3 ... Front sub-frame, 4A, 4B ... Reinforcement member, X ... Section where reinforcement member was installed.

Claims (1)

A front structure of a vehicle comprising a pair of left and right front side members extending in the front-rear direction on both left and right sides of the front portion of the vehicle, and a front subframe coupled to the front side member and extending in the vehicle width direction,
A pair of left and right reinforcing members that connect the front side member and the front subframe;
The vehicle front structure according to claim 1, wherein the reinforcing members intersect with each other and are connected so as to allow rotation at the intersection at the time of a front collision.

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