JP2582174Y2 - Front body structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a front frame of an automobile, and more particularly to a structure for absorbing a shock of the front frame.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. 60-13731, a bead is formed on a front frame. This controls the bending mode of the front frame by forming a vertical bead provided in the frame along the length direction and a horizontal bead orthogonal to the vertical bead. However, the front frame is the part where the load is reliably input at the time of a frontal collision,
A structure that constantly and efficiently absorbs impacts is required.

[0003]

The object of the present invention is to meet the above-mentioned demand. In the first aspect, a bracket is reinforced from a front end of a front frame to a concave horizontal bead, and an input load is directly applied to the horizontal bead to cause a collision. The purpose is to surely fold the front frame with a horizontal bead at times and absorb the impact by breaking.

The second object of the present invention is to use a bumper reinforcement as a load input member at the front end of the front frame to reliably transmit the load received by the bumper at the time of collision to the lateral beads via the bracket.

According to a third aspect of the present invention, by forming a vertical bead on the front frame, the front end of the frame is reinforced by the frame itself, so that the load is concentrated on the horizontal bead when a load is input, and the front frame is folded at the position of the bead. It is intended for. A fourth object of the present invention is to arrange a horizontal bead so that the front frame is bent in a zigzag manner so that a shock is efficiently absorbed.

[0006]

According to a first aspect of the present invention, there is provided a front frame which forms a closed cross section along the front and rear direction of a vehicle body.
In the structure in which the front frame is provided with a concave horizontal bead substantially perpendicular to the length direction of the front frame, a bracket having a predetermined length in the front-rear direction along the front frame length direction is attached to the front portion of the front frame. ,
A load input member is attached to the bracket, and the lateral bead is formed on the same plane as the bracket mounting surface of the front frame and at a position corresponding to the rear end of the bracket of the front frame.

According to a second aspect of the present invention, the load input member is a bumper reinforcement, and the bracket has a frame mounting surface mounted on a front frame, and a bracket perpendicular to the frame mounting surface. , A reinforcement flange parallel to the front frame, and a bumper reinforcement mounting surface.

According to a third aspect of the present invention, there is provided a vehicle as set forth in the first aspect, wherein a vertical bead is provided on a front side of the horizontal bead of the front frame so as to be substantially parallel to a longitudinal direction of the front frame. It is.

According to a fourth aspect of the present invention, the front frame is formed with a plurality of horizontal beads sequentially formed at predetermined intervals along a length direction of the front frame, and adjacent beads in the length direction. The matching horizontal beads are formed on opposing surfaces of the front frame.

[0010]

[Function] The rigidity from the lateral bead to the front frame tip is increased, and the input load is directly applied to the lateral bead to induce the front frame to bend at the lateral bead, to surely fold the lateral bead and absorb the impact. Further, when the horizontal bead is broken, the length of the frame itself in the vehicle width direction is reduced. For this reason, the rigidity of the frame in the axial direction is reduced, and the frame is reliably broken even in the next bead. In this manner, the front frame is induced to bend at the positions of the beads alternately formed facing the opposing surface of the front frame, and the shock is absorbed by folding the frame in a zigzag manner.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a front portion of the vehicle body 1 according to the present invention, which is a right half view toward the front of the vehicle body 1. A front frame 2 is disposed on both sides of a front portion of the vehicle body 1. A front frame 2, a wheel apron 3 that forms an engine room 5 side wall along the front frame 2, and a dash that forms an engine room 5 rear end wall The engine room 5 is formed by the panel 4. A bumper reinforcement 61 as a load input member is provided from one end to the other end of the bumper 6 inside the bumper 6 attached to the front end of the front frame 2, and a bracket (bumper reinforcement mounting bracket).
62 is attached to the bumper reinforcement 61. That is, the bumper 6 is fixed to the front frame 2 via the bumper reinforcement 61 and the bumper reinforcement mounting bracket 62.

FIG. 2 is a diagram in which a bumper reinforcement mounting bracket 62 is mounted on the front frame 2. A concave horizontal bead 7 is provided on both sides of the front frame 2, and a bumper reinforcement mounting bracket 62 is mounted on the front end by welding on the same surface as the surface on which the frontmost horizontal bead 71 is provided. I have. The horizontal beads 7 are sequentially formed on both the left and right sides with a predetermined interval, and are adjacent to each other in the length direction of the horizontal beads 7.
The competitors are formed on the opposing surfaces of the front frame, and the lateral beads 7 are formed deeper and longer as the tip ends. The front frame 2 has a structure in which the front bead 7 is bent zigzag at the position of the horizontal bead 7 to absorb an impact.

As shown in FIG. 3, the bumper mounting bracket 62 has a frame mounting surface 621 fixed to the front frame 2, a bumper reinforcement mounting surface 622 to which the bumper reinforcement 61 is mounted, and a front end side of the front frame 2 from the front end. A reinforcing flange 623 having a length up to the bead 71 and being perpendicular to the frame mounting surface 621 is formed. The frame mounting surface 621 and the rear end of the reinforcing flange 623 are extended to just before the frontmost lateral bead 71. In this embodiment, the bumper reinforcement 61 is mounted on the same surface as the surface on which the horizontal beads 7 are provided (the surface on the engine room 5 side and the outer surface).

[0014] The shock absorption at the time of collision will be described. FIG.
Is a schematic diagram showing the folding of the front frame 2. When the vehicle body 1 has a head-on collision, a load is first applied to the bumper 6. If the input load is somewhat small, the bumper 6 and the bumper reinforcement mounting bracket 62 themselves are broken or come off to absorb the shock, but if the shock cannot be completely absorbed, the bumper reinforcement is attached. A load is received at 61, and the load is transmitted to the two front frames 2 on both sides so that the load does not concentrate on only one of the front frames.

When a load is applied, the front end of the front frame 2 is reinforced by the reinforcing flange 623 of the bumper reinforcement mounting bracket 62.
The load is concentrated on the frontmost lateral bead 71. The front end lateral bead 71 is bent toward the side where the front end lateral bead 71 is provided, and the length of the front frame 2 in the vehicle width direction is reduced.
For this reason, the rigidity of the front frame 2 in the axial direction decreases,
The next second horizontal bead 72 is also surely induced to break. The repetition causes the front frame 2 to bend in a zigzag manner along the lateral beads 7 provided alternately.

The horizontal bead 7 is formed so as to be deeper and longer at the tip end, so that it can be easily broken. The front end of the front frame 2 is reinforced by the reinforcing flange 623 of the bracket 62 for mounting the bumper reinforcement. Then be sure to break, one after another horizontal bead 7
Induces breaks. Therefore, the impact is reliably absorbed by the front frame 2.

As shown in FIG. 6, a concave bead 701 is provided on the lower surface of the front frame 2 at the same position as the bead 7 provided on the side surface, so that the front frame 2 can be bent downward. The engine, accessories and the like disposed in the engine room 5 are dropped downward, and the dash panel 4
It can be prevented from protruding into the rear cabin.

Further, as a structure for reinforcing the front end of the front frame 2, there is a method of forming not only the front end of the front frame 2 with the bumper mounting bracket 62 but also the vertical beads 8 along the front frame 2 as shown in FIG. . This forms a vertical bead 8 at the front end of the front frame 2 that is convex in the closed cross section and is formed in the front frame 2 direction and is strong in the front frame direction, unlike the horizontal bead 7. In this way, the bumper reinforcement mounting bracket 62 and the vertical bead 8 form a double reinforcing structure, so that further reinforcement can be performed, and even if the bumper mounting bracket 62 comes off at the time of impact input, the horizontal bead can be coped with. 7 can be induced to break.

In this embodiment, the surface on which the bumper reinforcement mounting bracket is mounted and the surface on which the horizontal beads are provided are the same. However, similar effects can be obtained by providing them on different surfaces. Of course.

[0020]

According to the first aspect of the present invention, from the front end of the front frame to the concave horizontal bead is reinforced by the bracket, and the input load is directly applied to the horizontal bead, and the front frame is reliably folded by the horizontal bead at the time of collision. Shock can be absorbed by breaking.

According to the second aspect, by using the bumper reinforcement as the load input member at the front end of the front frame, the load received by the bumper at the time of collision can be transmitted to the lateral beads via the bracket without fail.

According to the third aspect, by forming a vertical bead on the front frame, the front end of the frame is reinforced by the frame itself, so that the load is concentrated on the horizontal bead when a load is input, and the front frame is folded at the position of the bead. Can be.

According to the fourth aspect, by arranging the horizontal beads so that the front frame is folded in a zigzag manner, the impact can be efficiently absorbed.

[Brief description of the drawings]

FIG. 1 is a front perspective view of a vehicle body.

FIG. 2 is a side view of a front frame to which a bumper mounting bracket is mounted.

FIG. 3 is a perspective view of a single bumper mounting bracket.

FIG. 4 is a schematic diagram showing how the front frame is bent at the time of a collision.

FIG. 5 is a perspective view of the front end when the front end of the front frame is reinforced by a vertical bead.

FIG. 6 is a perspective view of a front end portion of a front frame provided with a bead on a lower surface.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body, 2 ... Front frame, 6 ... Bumper, 62
… Bracket (bumper reinforcement mounting bracket), 621… Frame mounting surface, 622…
Bumper reinforcement mounting surface, 623: reinforcing flange, 7: bead, 8: vertical bead.

Claims (4)

(57) [Scope of request for utility model registration] 1. A structure in which a front frame that forms a closed cross section along the front-rear direction of a vehicle body is provided before and after the vehicle body, and the front frame is provided with a concave horizontal bead that is substantially perpendicular to the length direction of the front frame. At the front of the frame, a bracket having a predetermined length in the front-rear direction along the length direction of the front frame is attached, a load input member is attached to the bracket, and the lateral beads are flush with the bracket mounting surface of the front frame. And a front body structure formed at a position corresponding to the rear end of the bracket of the front frame. 2. The load input member is a bumper reinforcement, the bracket includes a frame mounting surface mounted on a front frame, a reinforcing flange perpendicular to the frame mounting surface and parallel to the front frame, a bumper reinforcement. 2. The front vehicle body structure according to claim 1, wherein said front vehicle body structure comprises a forcing mounting surface. 3. The front body structure according to claim 1, wherein a vertical bead substantially parallel to a longitudinal direction of the front frame is provided on a front side of the horizontal bead of the front frame. 4. A plurality of horizontal beads are sequentially formed at predetermined intervals along a length direction of the front frame on the front frame, and the horizontal beads adjacent to each other in the length direction are formed on opposing surfaces of the front frame. The front vehicle body structure according to any one of claims 1, 2 and 3, wherein the front vehicle body structure is formed at the front.