JP2005199919A - Side member structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side member structure having a side member, a reinforcement and a panel and capable of easily adjusting strength. <P>SOLUTION: The structure is equipped with a first flange part 10c extending to the vehicle width direction on the upper part. The reinforcement 11 having a cross section approximately U-shape side member 10 extending to the vehicle longitudinal direction, a second flange part 11c connecting to a first flange part 10c of the side member 10, and a side wall 11b of a second connecting part which is provided at the rear side of the second flange part 11c and connecting to the side member 10, and the panel 12 covering from the upper side of the side member 10 and the reinforcement 11, are jointed and constituted so that the strength of the side member 10 fixing the reinforcement 11 and the side member 10 with welding by changing the length of the side wall 11b of the reinforcement 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a side member structure disposed in the front-rear direction below both sides of a vehicle body.

  An example of a conventional side member structure disposed in the front-rear direction below both sides of the vehicle body is shown in FIGS. 8 to 11, the side member structure includes a side member 20, a reinforcement 21 disposed in contact with the side member 20, and a panel 22 such as a front panel that covers the side member 20 and the reinforcement 21 from above. Have.

  The side member 20 has an inclined portion 20d that is inclined downward, and a horizontal portion 20e that extends continuously and horizontally from the rear of the inclined portion 20d. The side member 20 includes a bottom surface 20a, a side wall 20b extending upward from both sides of the bottom surface 20a, and an extending portion 20c extending from the upper side of the side wall 20b in the vehicle width direction (outside), and has a substantially U-shaped cross section. It is.

  The reinforcement 21 has a bottom surface 21a, a side wall 21b extending upward from both sides of the bottom surface 21a, and an extending portion 21c extending in the vehicle width direction from the upper side of the side wall 21b, and has a substantially U-shaped cross section. In addition, the extension part 20c of the side member 20 and the extension part 21c of the reinforcement 21 are substantially the same size. Further, as shown in FIG. 11, a stepped portion 20f directed upward is formed on the side member 20 on the rear side of the portion where the reinforcement 21 is disposed, and the side member 20 and the panel 22 at that portion are formed. The gap is prevented from being generated.

  When a collision occurs in front of the vehicle, the load is most applied to the inclined portion of the side member structure. In order to reinforce the inclined portion of the side member structure, the reinforcement 21 is disposed from the inclined portion 20d of the side member 20 to the horizontal portion 20e.

Such a side member structure is shared (shared) from a light vehicle to a heavy vehicle from the viewpoint of manufacturing cost.
When the vehicle collides in front of the vehicle, the force due to the collision and the force due to the weight behind the vehicle are applied to the inclined portion of the side member structure.
In a light vehicle, since the weight behind the vehicle is light, the inclined portion of the side member structure withstands the force caused by the collision and the force caused by the weight behind the vehicle, and the force propagates to the entire vehicle as it is. There is a risk of transmission to passengers in the room. Therefore, in a light vehicle, when the strength of the inclined portion of the side member structure is lowered and the vehicle collides in front of the vehicle, the inclined portion of the side member structure is crushed (bent) and absorbs the force caused by this collision. .
In a heavy vehicle, since the weight behind the vehicle is heavy, the inclined portion of the side member structure is crushed (bent) by the force due to the collision and the force due to the weight behind the vehicle to absorb the force.
Therefore, it is necessary to change the proof strength (strength) of the inclined portion of the side member structure in accordance with the weight of the vehicle from the viewpoint of ensuring the safety of the occupant in the passenger compartment even when the vehicle collides in front of the vehicle.

  In the front body structure of an automobile described in Patent Document 1 below, a reinforcement is added to a side member having a horizontal portion that extends rearward continuously from an inclined portion that is inclined downward. A technique is disclosed in which the strength is locally increased to prevent the connection portion from being bent at the time of a vehicle collision.

Japanese Utility Model Publication No. 3-53381

  As a method of changing the strength of the inclined portion of the side member structure, it is conceivable to change the thickness and size of the reinforcement. However, if the plate thickness of the reinforcement is changed, there is a problem that the alignment with other parts such as side members and panels changes, and the side member structure cannot be made common. That is, in the structure shown in FIG. 11, if the length of the horizontal portion 21 e of the reinforcement 21 is changed, the position of the step portion 20 f toward the upper side of the side member 20 needs to be changed in the vehicle front-rear direction. If the thickness of the plate is changed, it is necessary to change the height of the stepped portion 20f, so that there is a problem that the side member structure cannot be shared.

  Then, the subject of this invention is providing the side member structure which can adjust intensity | strength easily.

  A side member structure according to a first aspect of the present invention that solves the above-described problem includes an inclined portion that extends in the vehicle front-rear direction, an inclined portion that is inclined downward, and a horizontal portion that extends continuously from the rear of the inclined portion. A side member having a substantially U-shaped cross section having a first flange portion extending in the vehicle width direction at the upper portion, a reinforcement covering the side member from above, and a panel provided on the upper portion of the reinforcement are joined together. In the above-mentioned side member structure, the first joint portion having a second flange portion where the reinforcement overlaps the first flange portion from the inclined portion of the side member to the horizontal portion, and the first joint portion. And a second joint portion joined to the side member without having a flange portion that overlaps the first flange portion, and the first flange of the side member. The section at the first vehicle rear side than the joint portion of the reinforcement, wherein the step portion directed upward is provided.

  In the side member structure according to the second invention for solving the above-mentioned problem, in the side member structure described in the first invention, the panel is formed of a thin plate as compared with the reinforcement and the side member, The first flange portion and the second flange portion are welded, and the second flange portion and the panel are welded.

  A side member structure according to a third invention for solving the above-described problem is the side member structure described in the first invention or the second invention, wherein the second joint portion of the reinforcement is formed by the side member. It is characterized by being bonded to the side wall.

  In the side member structure according to the first aspect of the invention, the side member structure extends in the vehicle front-rear direction, has an inclined portion that is inclined downward, and a horizontal portion that extends horizontally continuously from the rear of the inclined portion, with the vehicle width direction at the top. In a side member structure in which a side member having a substantially U-shaped cross section having a first flange portion extending to, a reinforcement covering the side member from above, and a panel provided on the upper portion of the reinforcement are joined together. The reinforcement is provided on the vehicle rear side of the first joint portion having a second flange portion that overlaps the first flange portion across the horizontal portion from the inclined portion of the side member. And a second joint part joined to the side member without a flange part overlapping the first flange part, and the first flange part of the side member includes the The first flange of the side member on the vehicle rear side of the first joint portion of the reinforcement is provided with a step portion that extends upward on the vehicle rear side of the first joint portion of the sleeve. The strength of the side member structure formed by fixing the reinforcement and the side member by welding while changing the length of the second joint portion of the reinforcement is possible. Can be adjusted. As a result, since it is not necessary to change the length of the first joint portion of the reinforcement, the shape of the side member, and the shape of the panel according to the vehicle, the side member structure can be shared, Assembly is improved.

  In the side member structure according to a second aspect of the invention, in the side member structure described in the first aspect of the invention, the panel is formed of a thin plate as compared with the reinforcement and the side member, and the first flange portion and The second flange portion is welded and the second flange portion and the panel are welded, whereby the side member and the reinforcement are welded, and the reinforcement and the panel are welded. Therefore, the welding quality is stabilized and the assembling property is improved.

  In the side member structure according to the third invention, in the side member structure described in the first invention or the second invention, the second joint portion of the reinforcement is joined to a side wall of the side member. Thus, the strength of the side member structure formed by fixing the reinforcement and the side member by welding can be easily adjusted by changing the length of the second joint portion of the reinforcement. As a result, since it is not necessary to change the length of the first joint portion of the reinforcement, the shape of the side member, and the shape of the panel according to the vehicle, the side member structure can be shared, Assembly is improved.

  The best mode for carrying out the side member structure according to the present invention will be described below.

  1 is a perspective view of a side member structure according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along arrow II-II in FIG. 1, and FIG. 3 is a cross-sectional view taken along arrow III-III in FIG. 4 is a sectional view taken along arrows IV-IV in FIG. 1, FIG. 5 is a sectional view taken along arrows V-V in FIG. 1, and FIG. 6 is a perspective view of a reinforcement used in a side member structure according to an embodiment of the present invention. 7 and 7 are side views of a vehicle to which a side member structure according to an embodiment of the present invention is applied.

  As shown in FIG. 7, the side member structure according to one embodiment of the present invention includes a side member 10, a reinforcement 11 disposed in contact with the side member 10, and a front panel that covers the side member 10 and the reinforcement 11. And so on. The side member structure has an inclined portion that extends in the front-rear direction of the vehicle, and that inclines downward, and a horizontal portion that extends horizontally continuously from the rear of the inclined portion. That is, the side member 10 extends in the front-rear direction of the vehicle, and includes an inclined portion 10d inclined downward and a horizontal portion 10e extending horizontally from the rear of the inclined portion 10d. Similarly to the side member 10, the panel 12 extends in the front-rear direction of the vehicle, and has an inclined portion 12d inclined downward and a horizontal portion 12e extending horizontally from the rear of the inclined portion 12d. .

  The side member 10 has a substantially U-shaped cross section, and includes a bottom surface 10a, a side wall 10b extending upward from both sides of the bottom surface 10a, and a first flange portion 10c extending from the top of the side wall 10b in the vehicle width direction (outside). Have.

The reinforcement 11 extends in the front-rear direction of the vehicle and is disposed so as to be joined to the side member 10 from the inclined portion 10d of the side member 10 to the horizontal portion 10e. Therefore, the inclined portion 11d and the inclined portion 11d are inclined downward. And a horizontal portion 11e extending horizontally from behind.
The reinforcement 11 has a substantially U-shaped cross section, and extends in the vehicle width direction from the bottom surface 11a, the side wall 11b extending upward along the side wall 10b of the side member 10 from both sides of the bottom surface 11a, and the upper portion of the side wall 11b. It has the 2nd flange part 11c which is a 1st junction part. The second flange portion 11c of the reinforcement 11 and the first flange portion 10c of the side member 10 are joined. However, the side wall 11b extending along the side wall 10b of the side member 10 and the bottom surface 11a further extend from the rear of the second flange portion 11c of the reinforcement 11 toward the rear of the vehicle. Therefore, the side wall 11b extending from the rear of the second flange portion 11c of the reinforcement 11 toward the rear of the vehicle is the second joint portion.

  As shown in FIG. 5, the first flange portion 10 c of the side member 10 includes a step portion 10 f that extends upward from the second flange portion 11 c of the reinforcement 11 toward the rear of the vehicle. In the step portion 10f, as shown in FIG. 4, the side wall 10b of the side member 10 extends upward, and the first flange portion 10c of the side member 10 and the panel 12 are joined.

  Therefore, the strength of the side member structure in which the side member 10 and the reinforcement 11 are fixed by welding can be changed by changing the length of the side wall 11b, which is the second joint portion of the reinforcement 11, so that the vehicle It is not necessary to change the position of the step portion 10f of the side member 10 according to the weight of the side member 10, and the side member structure can be made common regardless of the weight of the vehicle.

  Note that the second flange portion 11 c of the reinforcement 11 extends outward from the first flange portion 10 c of the side member 10.

  Here, the assembly procedure of the side member structure according to one embodiment of the present invention will be described below.

  First, as shown in FIGS. 1 to 4, the reinforcement 11 is disposed so as to be joined to the side member 10. Next, the first flange portion 10c of the side member 10 and the second flange portion 11c of the reinforcement 11 are fixed by welding, and behind the second flange portion 11c of the reinforcement 11, the side wall 10b of the side member 10 and the reinforcement are fixed. 11 side walls 11b are fixed by welding.

Next, the panel 12 is disposed from above the member formed by welding the side member 10 and the reinforcement 11. Next, the panel 12 and the second flange part 11c of the reinforcement 11 are fixed by welding, and the panel 12 and the first flange part 10c of the side member 10 are welded behind the second flange part 11c of the reinforcement 11 by welding. Fix it.
Therefore, since the side member 10 and the reinforcement 11, the reinforcement 11 and the panel 12, and the side member 10 and the panel 12, that is, the welding between the thick plates and the welding between the thick plates and the thin plates, the welding quality is stabilized. , Improve the quality of assembly.

  Therefore, in the side member structure according to the embodiment of the present invention, the reinforcement 11 has a substantially U-shaped cross section for joining the side member 10, and the first flange of the side member 10 extends from the inclined portion 11d to the horizontal portion 11e. A second flange part 11c joined to the part 10c, and a side wall 11b which is a second joint part joined to the side wall 10b of the side member 10 without the second flange part 11c behind the second flange part 11c. The second flange portion of the reinforcement 11 is provided with the step portion 10f toward the upper panel 12 in the first flange portion 10c of the side member 10 located behind the second flange portion 11c of the reinforcement 11. The first flange portion 10c of the side member 10 and the panel 12 can be welded on the vehicle rear side of the portion 11c, and the second joint of the reinforcement 11 In it by changing the length of the side wall 11b, and the strength of the side member structure formed by fixing the reinforcement 11 and the side member 10 by welding it can be easily adjusted. Therefore, it is not necessary to change the length of the second flange portion 11c of the reinforcement 11, the shape of the side member 10 and the shape of the panel 12 according to the vehicle, so that the side member structure can be made common and assembled. Improves.

  Further, by arranging the reinforcement 11 from the inclined portion 10d of the side member 10 to the horizontal portion 10e, the side member 10 collides in front of the vehicle, and the inclined portion 10d of the side member 10 which is weakest to input force due to the collision. Can be reinforced, and the safety of passengers in the passenger compartment can be improved.

  Furthermore, by extending the second flange portion 11c of the reinforcement 11 outward from the first flange portion 10c of the side member 10, the first flange portion 10c of the side member 10 and the second flange portion 11c of the reinforcement 11 are connected. After the welding, the second flange portion 11c of the reinforcement 11 and the panel 12 can be welded, and welding between the thick plates and between the thick plate and the thin plate become stable, and the welding quality is stabilized and the assembling property is improved. improves.

It is a perspective view of the side member structure concerning one embodiment of the present invention. It is II-II arrow sectional drawing in FIG. It is the III-III arrow sectional drawing in FIG. It is IV-IV arrow sectional drawing in FIG. It is a VV arrow sectional view in FIG. It is a perspective view of the reinforcement used for the side member structure concerning one embodiment of the present invention. 1 is a side view of a vehicle to which a side member structure according to an embodiment of the present invention is applied. It is a perspective view of an example of the conventional side member structure. It is IX-IX arrow sectional drawing in FIG. It is XX arrow sectional drawing in FIG. It is XI-XI arrow sectional drawing in FIG.

Explanation of symbols

10 Side member 11 Reinforce 12 Panel

Claims (3)

A cross section having a first flange portion extending in the vehicle width direction at an upper portion, extending in the vehicle longitudinal direction, having an inclined portion inclined downward and a horizontal portion extending horizontally continuously from the rear of the inclined portion. A substantially U-shaped side member, and a reinforcement covering the side member from above;
In the side member structure joined to the panel provided on the upper portion of the reinforcement,
The reinforcement is provided on the vehicle rear side of the first joint portion having a second flange portion that overlaps the first flange portion across the horizontal portion from the inclined portion of the side member. A second joint part joined to the side member without having a flange part superposed on the first flange part,
The side member structure according to claim 1, wherein the first flange portion of the side member is provided with a stepped portion toward the upper side on the vehicle rear side of the first joint portion of the reinforcement.   The panel is formed of a thin plate as compared with the reinforcement and the side member, and the first flange portion and the second flange portion are welded, and the second flange portion and the panel are welded. The side member structure according to claim 1, wherein:   The side member structure according to claim 1, wherein the second joint portion of the reinforcement is joined to a side wall of the side member.

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