JP2006205797A - Vehicle body reinforcing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing structure having an action to enhance holding force in relation to a cabin space by efficiently absorbing shock force applied to a side sill and surely transmitting load to a cross member, etc., at the time of a side collision of a vehicle. <P>SOLUTION: In this structure, a bulkhead 1 is constituted to have a band-shaped recessed part 16 which is continuous in the horizontal direction along three side wall parts 11, 12 and 13 for forming substantially U-shaped cross section and has a recessed shape at the inside in a connecting part of a vehicle side surface of the side sill arranged on the side of a vehicle body and the cross member extended in the vehicle width direction on a lower side of the vehicle body. The bulkhead 1 is installed as a reinforcing member in the side sill. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle body skeleton structure of a vehicle, and more particularly to a reinforcing structure of a sill portion disposed on a side of a vehicle body.

  FIG. 4 shows the structure of the automobile body. The automobile body is composed of a side sill 2 that extends forward and backward at the lower side of the vehicle body, a cross member 3 that extends in the vehicle width direction below the vehicle body, and a center pillar 4 that extends vertically at the side of the vehicle body. Has been.

  When a side collision occurs in such a vehicle, in order to maintain the passenger compartment space from the impact force, the impact force is efficiently absorbed on the side surface of the vehicle body, and the impact force received by the side sill 2 is a side member (illustrated). It is important to efficiently transmit to the omission) and the cross member 3 (hereinafter simply referred to as the cross member 3 or the like). Therefore, in order to cope with such a side collision, the side sill 2 is usually reinforced in various ways. For example, a side collision occurs with respect to the side sill 2 at the joint between the side sill 2 and the cross member 3 or the like. There is an example in which reinforcement that also serves as closed cross-section reinforcement is applied so that when it occurs, the impact force can be efficiently transmitted to the cross member 3 and the like.

  With regard to the side wall reinforcing structure of such a vehicle, for example, in the connecting portion of the sill, the center pillar, and the side member, a structure in which the reaction force of the sill is improved stepwise by providing a recess or a protrusion on the sill wall itself. And a structure (Patent Document 1) that can secure a passenger compartment space by preventing an intrusion into the sill under the center pillar that occurs at the time of a side collision while suppressing an increase in weight, and a rear part of the floor from a cross member at the front part of the floor. For the section leading up to the cross member of the sill reinforcement that is integrally passed in the front-rear direction of the car body, an overhanging part and a flat part are provided to the outside of the car body as necessary to increase the axial strength and torsional strength. A plurality of inventions have been made, such as a structure (Patent Document 2) that holds the vehicle body by ensuring and controlling the bending strength at the time of collision.

Japanese Patent Application Laid-Open No. 10-10035 JP 11-348832 A

  Here, with respect to the vehicle body reinforcing structure as described above, as shown in FIGS. 5 and 6, a structure having an action of transmitting a load to the cross member 3 while performing cross-sectional reinforcement at the time of a side collision is reinforced in the side sill 2. Consider a configuration in which a bulkhead 101 as a member is arranged.

  Specifically, at the connecting portion where the side sill 2 extending in the front-rear direction at the vehicle body side lower portion, the cross member 3 extending in the vehicle width direction and the center pillar 4 extending in the vertical direction of the vehicle body are coupled, 2, a bulkhead that is a reinforcing member whose horizontal cross section is substantially U-shaped by the front side surface portion 111, the front surface portion 112, and the rear side surface portion 113 in the closed cross section formed by the sill inner 21 and the sill reinforcement 22. 101 is installed.

  Further, flanges 114 and 115 are provided on the front and rear sides of the bulkhead 101 along the front side portion 111 and the rear side portion 113, respectively. The bulkhead 101 is joined to the sill reinforcement 22 by the flanges 114 and 115. Yes.

  Further, the bulkhead 101 located at the joint between the side sill 2 and the cross member 3 has a role of transmitting the load generated at the side collision to the cross member 3 in addition to the purpose of reinforcing the cross section of the side sill 2. In order to increase the transmission efficiency, the front side surface portion 111 and the rear side surface portion 113 of the bulkhead 101 are disposed at positions facing the side surfaces of the cross member 3. Note that the wall surface of the bulkhead 101 is substantially flat.

  When the reinforcing structure as described above is used, the joint between the cross member 3 and the side sill 2 maintains the cross-sectional strength of the side sill 2 at the time of a side collision and is loaded against the cross member 3 by the bulkhead 101 provided in the side sill 2. Can be transmitted.

  Here, a case where a side collision occurs in the vehicle body having the reinforcing structure as described above will be considered. FIG. 7 shows a modification of the bulkhead 101 when receiving an impact force at the time of a side collision, and the right side in the figure is the vehicle outer side. As shown in FIG. 7A, the bulkhead 101 arranged between the inner 21 and the reinforcement 22 moves along with the deformation of the reinforcement 22 caused by the side collision, and the front portion 112 is connected to the sill inner 21. Touch (bottom). When the front part 112 comes into contact with the sill inner 21, as shown in FIG. 7 (b), a force acts on each of the connecting parts of the front side part 111, the rear side part 113, and the front part 112. When a force is applied to the joint portion, if the rigidity of the front portion 112 is not sufficient, the front portion 112 starts to deform inward at the initial stage of input.

  In this way, when the front part 112 starts to be deformed inward and a load is further applied, as shown in FIG. 7C, next, the front side part 111 and the rear side part 113 start to deform outward. Ultimately, as shown in FIG. 7D, the wall surface of the bulkhead 101 becomes a pantograph shape and is completely crushed.

  Therefore, when the bulk head 101 as described above is used, if a load is applied to the bulk head 101 due to deformation of the reinforcement 22 that occurs at the time of a side collision, the bulk head 101 is deformed and collapsed at the initial stage of input. Therefore, although a load is transmitted to the cross member 3, there is a possibility that it may be difficult to sufficiently maintain an effective proof stress.

  For this reason, the present invention effectively absorbs the impact force applied to the side sill at the time of a side collision of the vehicle, and transmits the load to the cross member or the like, thereby increasing the holding force for the passenger compartment space. It aims at providing the reinforcement structure which has this.

  In order to solve the above-mentioned problem, a vehicle body reinforcing structure according to claim 1 of the present invention includes a side sill disposed on a side of a vehicle body and a joint portion on a vehicle side surface of a cross member extending in the vehicle width direction below the vehicle body. The bulkhead as a reinforcing member installed in the side sill extends in the horizontal direction along the side surface portion of two side surface portions facing each other among the three side wall portions having a substantially U-shaped cross section. Each has at least one or more band-shaped concave portions that are concave on the inside.

  The vehicle body reinforcement structure according to claim 2 of the present invention for solving the above-described problem is the vehicle body reinforcement structure according to claim 1, wherein the front surface portion is another side wall portion connected to the two side surface portions facing each other. And at least one of the recesses is provided.

  A vehicle body reinforcement structure according to a third aspect of the present invention for solving the above-mentioned problems is the vehicle body reinforcement structure according to the second aspect, wherein the concave portion is continuous in a substantially U-shaped cross section along the side surface portion and the front surface portion. It is characterized by.

  According to the vehicle body reinforcing structure of the first aspect of the present invention, the bulkhead installed inside the side sill is provided with concave portions extending in the horizontal direction on the side portions facing each other, and the bulkhead side surface portion has a corrugated surface. As a result, the yield strength of the side surface of the bulkhead has increased, so even if the load on the bulkhead increases due to deformation of the sill reinforcement at the time of a side impact, the bulkhead The proof stress is improved, and even when the bulkhead is deformed, the side sill is guided by the belt-shaped concave portion so as to be curved inward, and the side slabs interfere with each other to hold the side sill. Therefore, the deformation of the side sill is effective, and the load can be reliably transmitted to the cross member, and the holding force with respect to the passenger compartment space can be increased.

  According to the vehicle body reinforcing structure according to claim 2 of the present invention, when the concave portion is provided on all three side wall surfaces constituting the bulkhead, when the load on the bulkhead increases due to the deformation of the sill reinforcement at the time of a side collision, The deformation of the side sill can be further suppressed by the proof strength of the side and front portions of the bulkhead, and the front portion of the bulkhead is not easily deformed, so that the front portion is Since the shape can be maintained, the load can be transmitted to the cross member and the like more efficiently, and the safety of the vehicle can be improved.

  According to the vehicle body reinforcing structure of the third aspect of the present invention, the concave portion is made continuous along the bulkhead side wall portion having a substantially U-shaped cross section, thereby further increasing the strength and further enhancing the safety of the vehicle. Can be improved.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described with reference to examples described later.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The vehicle body reinforcement structure according to this embodiment is applied to the vehicle body side surface reinforcement structure shown in FIG. The bulkhead 1 is disposed in the side sill 2 and has a substantially U-shaped cross section by a front side surface portion 11, a front surface portion 12, and a rear side surface portion 13, as shown in FIG. Further, flanges 14 and 15 are provided on the front and rear sides of the bulkhead 1 along the front side surface portion 11 and the rear side surface portion 13, respectively. The bulkhead 1 is joined to the sill reinforcement 22 by the flanges 14 and 15. .

  The front side surface portion 11 and the rear side surface portion 13 are arranged so as to face the end surface of the cross member 3 when viewed from the side of the vehicle body, and are configured so that impact force due to side collision or the like is efficiently transmitted to the cross member 3. ing.

  Further, a recess 16 is provided on the wall surface of the bulkhead 1. The concave portion 16 is a strip shape in the horizontal direction that is continuous over three surfaces of the front side surface portion 11, the front surface portion 12, and the rear side surface portion 13, and has a concave shape on the inner side. Two rows are provided. As a result, the surface of the bulkhead 1 forms a corrugated shape, and the tips of the strip-shaped recesses 16 are provided at intervals with respect to the flanges 14 and 15.

  Hereinafter, the operation of the vehicle body reinforcing structure according to the present embodiment will be described. FIG. 3 shows a modification of the bulkhead 1 at the time of a side collision in the vehicle body reinforcement structure according to the present embodiment, and the right side in the figure is the vehicle exterior side. When a side collision occurs at the side surface of the vehicle body as shown in FIG. 3 (a), the sill reinforcement 22 is deformed by the impact force and enters the vehicle interior space side as shown in FIG. 3 (b). Thus, the front portion 12 of the bulkhead 1 abuts against the sill inner 21.

  When the front surface portion 12 abuts on the sill inner 21 and a load is further applied, the load acts on the end portions of the front side surface portion 11 and the rear side surface portion 13 in contact with the sill inner 21. In this case, the front portion 12 starts to be easily deformed inward unless the concave portion 16 is provided. However, according to this embodiment, the front portion 12 has a corrugated surface and a structure having strength. Therefore, the force can be balanced and the shape can be maintained, and the load can be efficiently transmitted to the cross member 3. Further, since the front side surface portion 11 and the rear side surface portion 13 have corrugated surfaces and the drag increases, the bulkhead 1 can once hold the shape in the initial stage of input.

  Further, when the deformation of the sill reinforcement 22 further progresses and the load increases, in the bulkhead 1, the front surface portion 12 maintains the shape, and the front side surface portion 11 and the rear side surface portion 13 are deformed, and the cross member The deformation proceeds until the front side surface portion 11 and the rear side surface portion 13 are crushed, while maintaining the effect of transmitting the load to 3.

  In addition, when the front side surface part 11 and the rear side surface part 13 curve inward as shown in FIG. 2, depending on the shape of the bulkhead 1, as shown by a black dot in FIG. Will interfere with each other, the cross-sectional displacement is maintained, and the transmission of the load to the cross member 3 can be performed more accurately.

  As described above, if the reinforcing structure according to the present embodiment is used, the strength of the side sill 2 at the time of a side collision is improved by maintaining the strength of the bulkhead 1, and the load can be more efficiently transmitted to the cross member 3. As a result, it is possible to reduce the reinforcement of the side sill 2 itself, and to suppress the deformation of the side sill 2 to reduce the amount of intrusion into the vehicle interior, thereby improving the safety of the vehicle and reducing the possibility of occupant injury. be able to.

  In the above-described embodiment, the recesses 16 are arranged in two rows. However, the size of the bulkhead 1 may be increased or decreased as necessary. Moreover, the recessed part 16 does not need to be continuous over three surfaces, and if it is a strip | belt shape long in a horizontal direction, you may provide for every surface. Furthermore, although the tip of the recess 16 is provided at a distance from the flanges 14 and 15, it may extend to the boundary with the flanges 14 and 15. Further, since the structure having strength is obtained by making the surface of the bulkhead 1 corrugated, the wall portion of the bulkhead 1 may be provided with a convex portion instead of the concave portion. In addition, in the present embodiment, the structure of the bulkhead 1 that transmits a load to the cross member 3 has been described. However, not only the vicinity of the cross member 3 but also a bulk head having a substantially U-shaped cross section such as a side member is used. It can be used for the part where the input of the same condition occurs.

  The present invention relates to a vehicle body skeleton structure for a vehicle, and a vehicle body reinforcement structure having a role of reinforcing a cross section by using a bulkhead having a substantially U-shaped cross section and transmitting a load to a cross member or the like positioned on an inner surface of a sill. Is available regarding.

It is a perspective view which shows the bulkhead in the vehicle body reinforcement structure by the Example of this invention. In the vehicle body reinforcing structure according to the embodiment of the present invention, it is a cross-sectional view showing a modification when the wall surface of the bulkhead is deformed inward when a side collision occurs. In the vehicle body reinforcement structure by the Example of this invention, it is explanatory drawing which shows the modification of a bulkhead at the time of a side collision having arisen. It is explanatory drawing which shows the vehicle body structural example. It is a perspective view which shows the example of installation of a bulkhead. It is AA sectional drawing of FIG. It is explanatory drawing which shows the modification of a bulkhead at the time of side collision.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bulkhead 2 Side sill 3 Cross member 4 Center pillar 11 Front side part 12 Front side part 13 Rear side part 14, 15 Flange 16 Recessed part 21 Sill inner 22 Sill reinforce

Claims (3)

  A bulkhead as a reinforcing member installed in the side sill has a substantially cross-sectionally cross-sectional shape at a joint portion on the side surface of the vehicle between a side sill disposed on the side of the vehicle body and a cross member extending in the vehicle width direction below the vehicle body. Among the three side wall portions forming a letter shape, each of the two side surface portions facing each other has at least one or more belt-shaped concave portions extending in the horizontal direction along the side surface portions and having a concave shape inside. Characteristic body reinforcement structure.   2. The vehicle body reinforcing structure according to claim 1, wherein at least one or more of the recesses are provided along a front surface portion which is another side wall portion connected to the two side surface portions facing each other. Reinforced structure.   The vehicle body reinforcement structure according to claim 2, wherein the concave portion is continuous in a substantially U-shaped cross section along the side surface portion and the front surface portion.

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