JPH0728057Y2 - Front body structure of automobile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a front body structure of an automobile in which a front side frame is joined to an inner surface of a wheel apron that constitutes a side wall of an engine room.

[Prior Art] Conventionally, for example, as disclosed in Japanese Utility Model Laid-Open No. 59-176275, by forming a plurality of beads on a wall surface of a front side frame or the like at a predetermined interval, the front side frame is prevented from colliding at the time of a collision. It is known to positively buckle and deform to absorb impact energy.

[Problems to be Solved by the Invention] A battery tray that normally supports a battery is installed on the front upper surface of the front side frame provided in the engine room of the vehicle body. When one end of the battery tray is installed so as to project from the front side frame to the inner side of the vehicle in the layout of the vehicle body, the inward projecting portion of the battery tray is supported by the front side frame. It is necessary to mount the support bracket, and by mounting this support bracket, the surface rigidity of the front side frame increases. Therefore, there is a problem in that the support bracket installation portion of the front side frame cannot be buckled and deformed at the time of a collision, and the impact energy absorbing action may be insufficient.

The present invention has been made to solve the above problems, and even when the support bracket of the battery tray is attached to the front side frame, the installation portion of the support bracket is easily buckled and deformed in the event of an automobile collision. And a front body structure of an automobile capable of effectively absorbing impact energy.

[Means for Solving the Problems] The present invention is directed to a front part of an automobile including a front side frame joined to a wheel apron that constitutes a side wall of an engine room, and a battery tray installed on the front side frame. In the vehicle body structure, a pair of front and rear side plates protruding inward of the engine room, individual joints formed at the base end portions of both side plates, and tip portions of both side plates are connected to the front side frame. And a bead is formed before and after the installation portion of the support bracket.

[Operation] According to the above configuration, the front side frame is buckled and deformed at the bead portion formed before and after the installation portion of the support bracket when the vehicle collides, and the support portion of the support bracket is bent at the connection portion. By
The support bracket installation portion of the front side frame will also buckle and deform.

[Embodiment] FIG. 1 shows an embodiment of a front body structure of an automobile according to the present invention. The front vehicle body structure includes a pair of wheel aprons 1 forming side walls of an engine room, and a front side frame 2 joined to a lower end of an inner side surface of the wheel apron 1. The battery 3 is arranged on the upper surface of the part. A plurality of beads 4 and 5 are provided on the front upper surface and the inner side surface of the front side frame 2 for absorbing the impact energy acting on the vehicle body by easily buckling and deforming the front side frame 2 in the event of an automobile collision. It is formed in a groove shape. And front side frame 2
Between a pair of front and rear beads 4 formed on the upper surface of the front part of the vehicle, a support bracket 6 for supporting an inward protruding portion of a battery tray mounted with one end protruding inward of the engine room is spot welded or bolted. It is attached by means such as stopping.

As shown in FIGS. 2 and 3, the support bracket 6 includes a pair of joint portions 7 joined to the upper surface and the inner side surface of the front side frame 2 and side portions of the joint portions 7 facing each other. It is composed of a support portion 10 protruding inward of the vehicle body. The supporting portion 10 has a pair of side plates 8 standing upright from opposite side portions of the joint portions 7 and a connecting portion 9 connecting tip portions of the both side plates 8 when viewed in a plan view.
The support portion 10 is formed in a letter shape, and a flange portion 10a is formed on the inner circumference of the upper end portion of the support portion 10. Further, the wheel apron 1 is provided with a support portion 13 for supporting an outwardly protruding portion of the battery tray 11 protruding from the front side frame 2 to the outside of the engine room. Then, the locking projection 15 on the outer side of the engine room formed on the lower surface of the battery tray 11 is inserted into the locking hole 14 provided at the center of the support portion 13, and the support bracket 6 is supported. The locking projections 12 on the inner side of the engine room are inserted into the portion 10 for positioning, and the clamp bolts 16a and 16b attached to both sides of the locking tool 16 in this state are formed on the front side frame 2 respectively. The battery 3 and the battery tray 11 are fixed to the front upper surface of the front side frame 2 by engaging with the engaging hole 2a and the engaging hole 1a formed in the wheel apron 1.

In this way, the support bracket 6 is attached to the battery installation portion of the front side frame 2 and the support bracket 6
Since the one end of the battery tray 11, that is, the part protruding inward of the engine room is supported by the one end of the battery 3, the one end of the battery 3 is
The battery 3 when laid out so that it is installed so as to project inward from the engine room.
And the battery tray 11 can be stably supported.

In addition, the support bracket 6 includes a pair of front and rear side plates 8 in which the support portion 10 has the individual joint portions 7 formed at the base ends thereof.
And a pair of front and rear beads 4 formed in the front portion of the front side frame 2 while being formed in a U shape when viewed from above by the connecting portion 9 that connects the front end portions of the side plates 8 to each other.
Since the front side frame 2 is configured to be installed between the front side frame 2 and the front side frame 2 when a shock load is applied to the front side frame 2 at the time of collision of the automobile, the front portion of the front side frame 2 on which the support brackets 6 are installed corresponds to the shock load. It can be easily buckled and deformed, and the impact energy at the time of collision can be effectively absorbed.

That is, the front upper surface of the front side frame 2 is beaded by the impact load acting in the front-rear direction of the vehicle body at the time of a collision.
When the concave portions 4 and 4 are depressed downward and deformed, as shown in FIG. 5, the front inner surface of the front side frame 2 is deformed so as to project inward from the plane at the beads 4 and 4 portions. At the same time, a force acts to deform the support bracket installation portion between the beads 4 and 4 so as to be recessed in a V shape. The support bracket 6 has a pair of front and rear side plates 8 that form a support portion 10 and individual joints 7 formed at the base ends thereof. The base ends of the side plates 8 are independently attached to the front side frame 2. The supporting bracket 6 is joined to the supporting bracket 6 so that the supporting portion 10 is easily deformed at the connecting portion 9 due to an impact load.
The deformation of the front side frame 2 is not prevented at the installation portion of the front side frame, and the front part of the front side frame 2 can be easily buckled and deformed to effectively absorb the impact energy at the time of collision.

Further, in the above-described embodiment, the bead 5 is formed on the inner surface of the front side frame 2 in the installation portion of the support bracket 6, so that the installation portion of the support bracket 6 is more effectively buckled and deformed in the event of a vehicle collision. There is an advantage that you can.

[Effects of the Invention] As described above, according to the present invention, the support bracket joined to the front side frame is provided with a pair of front and rear side plates, a joint formed individually at the base end portions of both side plates, and a pair of side plates. It is composed of a connecting part that connects the tip parts to each other, and a bead is formed before and after the installation part of the support bracket. There is an advantage that the front side frame can be easily buckled and deformed to effectively absorb impact energy.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a front body structure of an automobile according to the present invention, and FIG. 2 is an exploded perspective view showing an essential part of the present invention,
3 is a perspective view showing the structure of the support bracket, FIG. 4 is a sectional view taken along the line IV-IV of FIG. 1, and FIG. 5 is a plan view showing a deformed state of the front side frame at the time of collision. 1 ... Wheel apron, 2 ... Front side frame, 3 ... Battery, 4 ... Bead, 6 ... Support bracket, 7 ... Joining part, 8 ... Side plate, 9 ... Connecting part.

Claims (1)

[Scope of utility model registration request] 1. A front vehicle body structure for an automobile, comprising: a front side frame joined to a wheel apron forming a side wall of an engine room; and a battery tray installed on the front side frame. A battery including a pair of front and rear side plates protruding inward of the engine room, individual joints formed at the base end portions of the both side plates, and a connecting portion connecting the front end portions of the both side plates to each other. A front body structure of an automobile, characterized in that a support bracket for a tray is mounted and beads are formed before and after a mounting portion of the support bracket.