JPH05270447A - Reinforcing structure of extruding material for automobile - Google Patents

Abstract

PURPOSE:To provide both improvement of rigidity and lightness in weight of an extruding material. CONSTITUTION:A side sill 2 is formed of extruding material of aluminum for providing lightness in weight, to insert a stainless steel-made hollow reinforcing member 5 of large rigidity to a hollow section part 4 in the twist center part of a skeleton structure. Ribs 8 to 13 are provided between a skeleton material 6 and an external wall 7 about the hollow section part 4. These ribs 8 to 13 are arranged so that the one or more ribs are connected to the external wall, where deformation near an extension line is prevented from easily reaching in a direction of the reinforcing member 5 of the rib connected to the deformed external wall, when any of the external wall 7 is deformed by receiving a load. Junction surfaces 14, 15 of connecting a floor 3 interposed from above and below are provided in the side sill 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure for an automobile extruded material made of an aluminum material which is integrally formed by extrusion processing.

[0002]

2. Description of the Related Art As a conventional reinforcing structure for an extruded material for an automobile, there is, for example, one shown in FIGS. 13 to 14 (see, for example, German Patent No. 3728757).

This relates to a side sill reinforcing structure, in which a pipe 21 is inserted into the side sill 20 to reinforce the side sill 20.

[0004]

However, in such a conventional reinforcing structure for an extruded material for an automobile,
Since the reinforcing pipe 21 is simply inserted into the cross section of the side sill 20, the reinforcing pipe 21 and the side sill 20 do not act in relation to each other, and therefore, sufficient energy can be absorbed in a side collision. No, and moreover,
Since the load is not transmitted to the floor, the reinforcement pipe 21
Has a problem in that it is merely limited to the reinforcement of the side sill 20.

The present invention has been made by paying attention to such a conventional problem, and an object of the present invention is to provide an extruded material for an automobile having a significantly improved rigidity for suppressing deformation of a vehicle compartment at the time of collision. It is an attempt to provide a reinforced structure.

[0006]

Therefore, according to the present invention, a hollow cross section is provided in the torsion center of a skeleton member of an aluminum extrusion extruded material integrally molded by extrusion, and the hollow cross section is rigid. High-strength steel reinforcing member is inserted, and when a plurality of ribs provided between the skeleton member around the hollow cross-section and the outer wall surface are deformed on the outer wall near one of the ribs, The ribs and the reinforcing member are arranged so that one or more ribs are provided between the outer wall and the skeleton material around the hollow cross-section, which are unlikely to be deformed near the extension line connecting the ribs and the reinforcing member.

[0007]

[Operation] When a load is applied to the vehicle body and the skeleton member is deformed,
Torsional deformation force is applied to the reinforcing member from the outer wall of the deformed frame member through the rib. However, at this time, the deformation of the reinforcing member is suppressed by the ribs connected to the remaining undeformed outer wall, so that the deformation of the automobile extrusion is suppressed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. Figure 1
9 is a view showing an embodiment in which the present invention is applied to a side sill.

First, the configuration will be described. FIG. 1 is a view showing a vehicle body structure 1 embodying the present invention and showing a side sill in which the present invention is applied to an A portion.

The side sill 2 and the floor 3 are shown in FIG.
An enlarged view of disassembled components is shown in FIG.

The side sill 2 is made of an extruded material using an aluminum material in order to reduce the weight, and has an enlarged cross section and a large section modulus in order to enhance rigidity. The side sill 2 has a hollow cross section 4 in the torsion center of the skeleton structure, and a hollow reinforcing member 5 made of steel and having high rigidity is inserted in the hollow cross section. Further, ribs 8 to 13 are provided between the skeleton member 6 around the hollow cross section 4 and the outer wall 7.

As shown in FIG. 4, the ribs 8 to 13 are reinforced with the rib 8 when the outer wall 7a close to the rib 8 is deformed by the twisting moment M applied to the side sill 2 as shown by the dotted line. A rib 11 forming a pair with the rib 8 is arranged near the outer wall 7b, which is the closest to the extension line connecting the member 5 and is not deformed.

Similarly, as shown in FIG. 5, when the outer wall 7a is deformed by the load F, the rib 8 is paired with the outer wall 7b which does not deform near the extension line of the rib 8 toward the reinforcing member 5. The ribs 10, 11 and 12 are installed so as to be provided.

That is, when the outer wall close to a certain rib is deformed, a rib connected to the deformed outer wall is paired with a most deformable outer wall near the extension line connecting the rib and the reinforcing member 5. One or more ribs are provided.

Further, the side sill 2 has joint surfaces 14 and 15 for joining to the floor 3 on the inner wall surface, the joint surface 15 is a lower portion of the side sill 2, and the joint surface 14 is an intermediate portion where the rib 9 is located. The joint surface 14 faces upward as shown in FIG. 3 before being joined to the floor 3.

FIG. 6 shows an assembled state of the side sill 2 and the floor 3. The hollow reinforcing member 5 is inserted into the hollow cross-section portion 4 of the side sill 2, and the floor 3 is joined by first overlapping the floor 3 from the upper part of the joining surface 15 by spot welding 16, and then joining the joining surface 14 to the joining surface 14 shown in FIG. Bend down as shown,
It is joined to the upper surface of the floor 3 by lap spot welding 17.

Further, as shown in FIG. 7, the anchor portion 19 of the seat belt 18 is attached by a bolt 21 to a weld nut portion 20 in which the inner side wall surface 7c of the side sill 2 is partially cut and welded to the hollow reinforcing member 5 inside. ing.

Next, the operation will be described. The side sills are made in one piece by extrusion. The side sill 2 is made of an aluminum material for weight reduction, and has an enlarged cross section to increase the section modulus in order to increase rigidity. Incidentally, the Young's modulus of aluminum is 7,000 kgf / mm ² , and the Young's modulus of steel is 21,000 kgf / mm ² .

Since the frame members constituting the vehicle body such as the front pillar 21 and the center pillar 22 are joined to the side sill 2, the outer wall 7 of the side sill 2 to which the pillars are joined when the vehicle body 1 is deformed. A large load is applied, and a load that twists the side sill 2 is transmitted.

The side sill 2 has only one twist center,
Since the reinforcing member 5 has a certain size, the reinforcing member 5 is at a position offset from the torsion center. For this reason, when the side sill is twisted and deformed, the load applied to the outer wall 7 is twisted and deformed to the reinforcing member 5 via the rib.

However, in the present embodiment, when the reinforcing member 5 is deformed by the rib 8, for example, the deformation of the reinforcing member 5 is suppressed by the ribs 11 and the like connected to the remaining undeformed outer wall. Be done. As a result, the deformation of the outer wall subjected to the load is suppressed.

Theoretically, as shown in FIG.
When the moment load M is applied to a certain point 24, in order to cancel the moment M, a force is applied to the point 25 where a moment force in the opposite direction to the force is generated. Or it is effective to fix it.

In other words, in the case of the present embodiment, the load received by a certain outer wall of the side sill 2 is transmitted to the highly rigid reinforcing member 5 placed in the vicinity of the torsion center, and the load is deformed from the outer wall. It is received by the outer wall which is not deformed through a rib connected to the outer wall which is not deformed. That is, the entire member of the side sill 2 is efficiently loaded to suppress the deformation of the side sill 2.

Further, in this embodiment, as shown in FIG. 5, the cross section is prevented from being deformed by the load F received from the center pillar applied to the upper surface of the side sill 2, and the joint rigidity with the center pillar is improved.

Further, the floor 3 is deformed upward inward at the time of a frontal collision, and in the case of aluminum in particular, the strength of spot welding is low, so that it may break from the joint with the side sill 2. However, according to this embodiment, as shown in FIG.
Since the side sill 2 and the side sill 2 are spot-bonded from the upper surface and the lower surface of the floor 3 by the bonding surfaces 14 and 15,
When the floor 3 is pulled inward and upward as described above, a shearing force that maximizes the spot strength acts on the spot joints 16 and 17 of the side sill 2 and the floor 3, and the load on the joint surface is the rib 9 and the rib. Since it is transmitted to the reinforcing member 5 through 10, the breakage of the side sill 2 is prevented. Therefore, it is possible to prevent the floor 3 from being separated from the side sill 2 and broken during a frontal collision.

Further, at the time of a side collision, as shown in FIG. 10, when the load F is applied to the wall surface of the side sill 2 on the outer portion side, the reinforcing member 5 is inserted into the hollow cross section, so that the crush deformation is caused by the outer portion. Stays at, and ribs 11,12,1
The energy can be efficiently absorbed without deforming the vehicle interior due to the crushing of 3.

Further, since the seat belt anchor portion 19 is attached to the reinforcing member 5 having high rigidity, the attaching portion will not be broken at the time of collision.

11 to 12 show another embodiment of the present invention. In this embodiment, the ribs 25, 2 having a snail-like shape are provided on the corners 23, 24 of the outer wall of the outer portion of the side sill 2.
6, 27 are provided, and the ribs 25, 26, 27 and the skeleton portion 6 of the hollow cross section are connected by the ribs 28, 29, and
Corners 23, 24 and ribs 25, 26, 27
Steel reinforcing members 30 and 31 are inserted between and.

According to this embodiment, in addition to the above embodiment,
When a load F is applied to the outer portion of the side sill 2 at the time of a side collision as shown in FIG. 12, the wall surface begins to be crushed. At that time, since the reinforcing members 30 and 31 made of steel are inserted in the corner portions, the load is applied. Not only the part is locally deformed, but the load is dispersed in a wide range by the reinforcing members 30 and 31 and the outer wall is crushed.
Moreover, the energy absorption efficiency is significantly increased.

[0030]

As described above, according to the present invention, when a twisting deformation is applied to the reinforcing member installed at the twist center from the outer wall under load via the rib, Since the deformation of the reinforcing member is suppressed by the ribs connected to the outer wall where the remaining deformation does not occur,
The deformation of the outer wall under load is suppressed, and the rigidity of the side sill can be significantly improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a vehicle body structure to which an embodiment of the present invention is applied.

FIG. 2 is a perspective view showing a part of a cross section of one embodiment of the present invention.

FIG. 3 is a perspective view showing the components of the embodiment in an exploded manner.

FIG. 4 is a sectional view showing a state when a torsional moment is applied to the side sill of the embodiment.

FIG. 5 is a sectional view showing a state when a load is applied to the side sill of the embodiment from above.

FIG. 6 is a sectional view showing an assembled state of the embodiment as well.

FIG. 7 is a perspective view showing a mounting state of the seat belt anchor according to the embodiment.

FIG. 8 is a perspective view for explaining the effect of the same embodiment.

FIG. 9 is a sectional view showing a state when a load is applied from the front of the vehicle in the same embodiment.

FIG. 10 is a sectional view showing a state when a load is applied from the side surface of the vehicle according to the embodiment.

FIG. 11 is a perspective view showing a part of another embodiment of the present invention in section.

FIG. 12 is a perspective view showing a state when a load is applied from the side surface of the vehicle according to another embodiment.

FIG. 13 is a perspective view showing an example of a conventional vehicle body structure.

FIG. 14 is a cross-sectional view showing an example of a conventional side sill reinforcing structure.

[Explanation of symbols]

 2 ... Side sill 3 ... Floor 5 ... Reinforcing member 8, 9, 10, 11, 12, 13, ... Rib 14, 15 ... Joining surface

Claims (1)

[Claims] 1. A hollow cross-section is formed in the torsion center of a skeleton member integrally formed by extrusion and a highly rigid steel hollow reinforcing member is inserted into the hollow cross-section, and the hollow cross-section is surrounded. A plurality of ribs are provided between the skeleton member and the outer wall of the skeleton member, and an extension line connecting the rib and the reinforcing member when the outer wall near one of the ribs is deformed. A reinforcement structure for an extruded material for an automobile, characterized in that at least one rib is arranged between the outer wall, which is hard to be deformed to be close to the above, and the skeleton member around the hollow cross-section portion.