Front body structure of vehicle
阅读说明:本技术 车辆的前部车身结构 (Front body structure of vehicle ) 是由 榎晃一 阿部淳一 于 2019-09-06 设计创作,主要内容包括:本申请涉及一种车辆的前部车身结构。前纵梁(20)在前部具有使上部接合凸缘部(41)向车辆宽度方向外方延伸出的前部部分(42)。在前部部分(42)的车辆宽度方向外侧的侧面上,以重叠的方式而焊接有加强板(32)。加强板(32)具有以与前纵梁(20)的上部接合凸缘部(41)重叠的方式而被焊接的凸缘(52)。加强板(32)的后边缘位于与前部部分(42)的后边缘相同的位置处、或位于更靠后方处。通过加强板(32)而对前部部分(42)以及上部接合凸缘部(41)的变形进行抑制,从而抑制了前纵梁(20)的封闭截面结构的溃变。(The present application relates to a front vehicle body structure of a vehicle. The front side member (20) has a front portion (42) extending the upper joint flange portion (41) outward in the vehicle width direction at the front portion. A reinforcement plate (32) is welded to the vehicle transverse direction outer side surface of the front section (42) in an overlapping manner. The reinforcement plate (32) has a flange (52) welded so as to overlap the upper joint flange (41) of the front side member (20). The rear edge of the reinforcement plate (32) is located at the same position as the rear edge of the front portion (42), or at a more rearward position. Deformation of the front portion (42) and the upper joint flange (41) is suppressed by the reinforcing plate (32), and collapse of the closed cross-sectional structure of the front side frame (20) is suppressed.)
1. A front vehicle body structure of a vehicle, comprising:
a front side member that is disposed on the left and right of a front portion of a vehicle, extends in a longitudinal direction of the vehicle, and is formed into a closed cross-sectional structure by joining an outer member and an inner member positioned on an inner side of the outer member in a vehicle width direction, wherein a joint flange portion is formed at an upper edge or a lower edge on an outer side in the vehicle width direction by joining a flange provided on the outer member and a flange provided on the inner member, and the front side member has a front portion at a front portion where the joint flange portion extends in the vehicle width direction, and a rear portion at a rear portion where the joint flange portion extends in a vertical direction;
and a reinforcement panel that is disposed so as to overlap at least a part of a vehicle width direction outer side surface of the closed cross-section structure portion of the front portion and at least a part of the joining flange portion of the front portion, and that has at least a part on the joining flange portion side of a rear edge located at the same position as a rear edge of the front portion or located further rearward beyond the rear edge of the front portion.
2. A front vehicle-body structure of a vehicle according to claim 1,
the front side member has a transition portion between the front portion and the rear portion, at which a direction in which the joint flange portion extends from a rear edge of the front portion to a front edge of the rear portion changes from a vehicle width direction to a vertical direction,
at least a portion of the rear edge of the reinforcement panel on the side of the engagement flange is located at the transition portion.
Technical Field
The present disclosure relates to a front body structure of a vehicle, and more particularly, to reinforcement of a front side member.
Background
The front vehicle body structure, which is a portion forward of a passenger compartment of the vehicle, includes a pair of front side frames extending in a longitudinal direction of the vehicle on the left and right sides of the portion. The front side member receives a collision load from the front side at the time of a frontal collision, and absorbs collision energy by deforming itself.
Patent document 1 below shows a front side member (12) and a gusset plate (40) disposed on the vehicle transverse direction outer side of the front side member (12). The front side member (12) has a closed cross-sectional structure in which a front side member outer section (38) located on the outer side in the vehicle width direction and a front side member inner section (39) located on the inner side are joined together. The gusset (40) transmits the collision load received by the end of the front bumper reinforcement (16) to the front side member (12) in the event of a small overlap collision or the like. The above-mentioned symbols in parentheses are those used in patent document 1 below, and are not related to those used in the description of the embodiments of the present application.
Prior art documents
Patent document
Patent document 1: japanese patent laid-open publication No. 2016-117433
In a frontal collision, the front side frame is deflected by the collision load, and the collision energy is absorbed. If the joint between the vehicle width direction outer member and the inner member forming the closed cross-sectional structure is broken at the time of the occurrence of the deflection, the closed cross-sectional structure is broken. This may cause the strength to be insufficient, and the front side frame may not be deformed as expected at the time of a collision, and the amount of absorption of collision energy may be reduced to an expected amount.
Disclosure of Invention
The present disclosure is a technique for suppressing collapse of a closed cross-sectional structure of a front side frame at the time of a frontal collision.
The vehicle front body structure according to the present disclosure includes: a pair of front side members that are disposed on the left and right sides of a vehicle front portion, extend in the longitudinal direction of the vehicle, and are formed into a closed cross-sectional structure by joining an outer member and an inner member that is positioned on the vehicle width direction inner side of the outer member; and a reinforcement panel that is disposed so as to overlap a portion of a side surface of the front side member on the vehicle transverse direction outer side. In the front side member, joint flange portions formed by joining flanges provided on the outer member and the inner member, respectively, are formed at upper or lower edges of the vehicle width direction outer side. The front side member has a front portion at the front portion, in which the joint flange portion extends in the vehicle width direction, and a rear portion at the rear portion, in which the joint flange portion extends in the vertical direction. The reinforcement panel is disposed so as to overlap at least a part of the vehicle transverse direction outer side surface of the closed cross-section structure portion of the front portion and at least a part of the joining flange portion of the front portion, and at least a part of the rear edge of the reinforcement panel on the joining flange portion side is located at the same position as the rear edge of the front portion or is located further rearward beyond the rear edge of the front portion.
By reinforcing the joint flange portion of the front side frame and the vicinity thereof with the reinforcing plate, when the front side frame is deflected by a frontal collision, the joint flange portion is prevented from being cracked and the closed cross-sectional structure is prevented from being broken.
The front side member may have a transition portion between the front portion and the rear portion, and a direction in which the flange portion extends from the rear edge of the front portion to the front edge of the rear portion changes from the vehicle width direction to the vertical direction at the transition portion. Furthermore, at least a portion of the rear edge of the reinforcement panel that engages the flange portion side is located at the transition portion.
The deformation of the front side member is made as expected by suppressing the collapse of the closed cross-sectional structure of the front side member by the reinforcing plate.
Drawings
Fig. 1 is a plan view schematically showing a main part of a front vehicle body structure of a vehicle.
Fig. 2 is a side view schematically showing a main part of a front vehicle body structure of a vehicle.
Fig. 3 is a perspective view showing the structure of the front side frame and the components around it.
Fig. 4 is a side view showing the structure of the front side member and the components around it.
Fig. 5 is a sectional view of a front portion of the front side member.
Fig. 6 is a cross-sectional view of a transition portion of the front side member.
Fig. 7 is a sectional view of a rear portion of the front side member.
Fig. 8 is a plan view showing a state of deformation of the front side frame at the time of a frontal collision.
Detailed Description
Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following description, unless otherwise specified, words indicating relative positions and directions such as front, rear, left, right, upper, lower, and lower indicate directions and positions relating to the vehicle. The front-rear direction of the vehicle is referred to as the longitudinal (longitudinal) direction, the left-right direction is referred to as the lateral (lateral) direction, and the up-down direction is referred to as the vertical (vertical) direction. Further, a side closer to a center line extending in a longitudinal direction of the vehicle in a lateral direction of the vehicle (vehicle width direction) is referred to as a vehicle width direction inner side, a direction toward the center line is referred to as a vehicle width direction inner side, a side farther from the center line is referred to as a vehicle width direction outer side, and a direction away from the center line is referred to as a vehicle width direction outer side. In the drawings, arrow FR indicates the front, arrow UP indicates the upper, arrow LH indicates the left, and arrow OUT indicates the outer in the vehicle width direction.
Fig. 1 and 2 are views schematically showing a front portion of a
The
Fig. 3 and 4 are views showing the left
The
The
At the front portion of the
Welding flanges are provided at portions of the
In the
The
The
The reinforcing
Fig. 8 is a plan view schematically showing a state in which the left
When the joint portion of the
A
In order to suppress the deformation of the
In the above-described embodiment, the
Description of the symbols
10 … vehicle; 12 … passenger compartment; 14 … front wall of the compartment; 16 … engine compartment; 18 … front vehicle body structure; 20 … front longitudinal beams; 20c … outer upper edge; 22 … crash box; 24 … bumper reinforcement; 26 … front pillar; 28 … front upper member; 30 … suspension tower; 32 … reinforcing panels; 32a … (of the stiffener plate) rear edge; 34 … an outer member; 36 … inner part; 38 … outer upper flange; 40 … inner upper flange; 41 … upper engagement flange portion; 42 … front portion; 44 … rear portion; 46 … transition portion; 48 … outer lower flange; 50 … inner lower flange; 52 … stiffening the panel upper flange; 54 … stiffening the panel lower flange; 56 ….
- 上一篇:一种医用注射器针头装配设备
- 下一篇:铝合金电动观光车车身