JP2009029335A - Vehicle body reinforcing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body reinforcing structure capable of more improving rigidity of a front part of a vehicle body so as to restrict deformation of a strut tower bar and side bars when torsion is input. <P>SOLUTION: A face-like reinforcing cover member 11 is fixed to the inside of a triangle tower bar, which is formed of a strut tower bar 8 and side bars 10a and 10b, so that a front part 11a on a front side of the vehicle in the back and forth direction is brought in contact with an intermediate part in the car cross direction of the strut tower bar 8 and that both edges of a rear part 1f on a rear side of the vehicle in the back and forth direction are brought in contact with an intermediate part of the side bars 10a and 10b. Rib parts 11d and 11e are provided on both sides in the car cross direction of the reinforcing member 11 along the longitudinal direction thereof. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle body stiffening structure for a vehicle in which a strut tower bar is connected between left and right strut towers, and both ends of the strut tower bar and a dash panel are connected by side bars for reinforcement.

As a technique for increasing the rigidity of the front part of the vehicle body, a structure in which the upper end portions of the left and right strut towers are connected by a strut tower bar is known. In addition, in order to improve the rigidity of the front part of the vehicle body, the other end side of the pair of side bars respectively connected at one end side to both ends of the strut tower bar is extended toward the center side in the vehicle width direction. Has been proposed (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2001-138952

  In the structure such as Patent Document 1, the strut tower bar suppresses the displacement of each strut tower in the vehicle width direction, and the side bar suppresses the displacement of each strut tower in the vehicle longitudinal direction. The rigidity of the front part of the vehicle body can be improved.

  However, even in the structure in which both ends of the strut tower bar and the dash panel are connected by a side bar as in Patent Document 1, when a large lateral G acts on the vehicle during cornering and a torsional input is generated from the front wheel suspension, Displacement may occur in the strut tower bar and side bar.

  Therefore, an object of the present invention is to provide a vehicle body stiffening structure that can further increase the rigidity of the front portion of the vehicle body so that deformation of the strut tower bar and the side bar can be suppressed when a torsion is input.

  In order to achieve the above object, according to the present invention, a strut tower bar extending in the vehicle width direction is connected between the left and right strut towers supporting the upper end of the strut of the front wheel suspension, and the front and rear of the vehicle at both ends of the strut tower bar. One end side of a pair of reinforcing side bars is connected to the rear side in the direction, and the other end side of the pair of side bars is connected to a center portion of a dash panel that partitions the engine room and the vehicle compartment, and the strut In the vehicle body stiffening structure in which the tower bar and the pair of side bars form a triangular tower bar, inside the triangular tower bar formed by the strut tower bar and the pair of side bars, The front part on the front side in the direction touches the middle part in the vehicle width direction of the strut tower bar, and the two edge sides on the rear part on the rear side in the vehicle front-rear direction are the pair of support parts. The planar reinforcing cover member is fixed so as to contact with the middle portion of Doba, in the vehicle width direction on both sides side of the reinforcing cover member is characterized in that a rib along its length.

  According to the vehicle body stiffening structure of the present invention, the front part in the vehicle front-rear direction front side is the middle in the vehicle width direction of the strut tower bar inside the triangular tower bar formed by the strut tower bar and the pair of side bars. The sheet-shaped reinforcing cover member is fixed so that both edge sides of the rear portion on the rear side in the vehicle longitudinal direction are in contact with the middle portion of the pair of side bars, and the longitudinal direction of the reinforcing cover member on both sides in the vehicle width direction is fixed. Therefore, the rigidity of the triangular tower bar itself formed by the strut tower bar and the pair of side bars is improved, and the rigidity of the front portion of the vehicle can be further increased.

  Therefore, even when a torsional input is generated from the front wheel suspension, it is possible to suppress the displacement of the strut tower bar and the pair of side bars.

  Hereinafter, the present invention will be described based on illustrated embodiments. FIG. 1 is a schematic perspective view showing a vehicle body front portion of a vehicle (automobile) having a vehicle body stiffening structure according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 1 is an exploded perspective view of a vehicle body stiffening structure according to an embodiment of the invention.

  As shown in FIG. 1, front fender aprons 3a and 3b and strut towers 4a and 4b for supporting upper ends of struts of the front wheel suspension are provided on both sides in the vehicle width direction of the engine room 2 of the vehicle 1, respectively. Front side members 5a and 5b extending in the vehicle front-rear direction are provided at the lower part of the engine room 2, and front bumper reinforcements (not shown) are provided at the front ends of the front side members 5a and 5b in the vehicle front-rear direction. Yes. A dash panel 7 that partitions the engine room 2 and the vehicle compartment 6 is provided between the engine room 2 and the vehicle compartment 6.

  Between the upper surfaces 4c and 4d of the strut towers 4a and 4b, a metal strut tower bar 8 extending in the vehicle width direction is connected by bolt fastening. An engine (not shown) or the like is disposed below the strut tower bar 8.

  Further, a side bar connecting member 9 is fixed to the center of the dash panel 7 in the vehicle width direction by bolt fastening, and the strut tower 4a is interposed between the side bar connecting member 9 and both ends of the strut tower bar 8. 4b, both end sides of the metal side bars 10a, 10b for increasing the rigidity in the vehicle front-rear direction are fitted. As a result, a triangular tower bar having the strut tower bar 8 as the bottom and the side bars 10a and 10b as the sides is formed. The strut tower bar 8 is formed in a hollow flat plate shape, and the side bars 10a and 10b are formed in an elliptical cross section.

  On the inner side of the triangular tower bar formed by the strut tower bar 8 and the side bars 10a and 10b, the strut tower bar 8 is located between the middle part in the vehicle width direction of the strut tower bar 8 and the middle part of the side bars 10a and 10b. Thus, the planar reinforcing cover member 11 made of a resin material is provided.

  The front part (vehicle front side) 11a of the reinforcing cover member 11 is in contact with the inner side of the strut tower bar 8, and both side parts 11b and 11c are arranged from the strut tower bar 8 side toward the side bars 10a and 10b. It is formed so as to spread slightly outward in the direction. Near both side portions 11b and 11c, rib portions 11d and 11e are integrally formed along the longitudinal direction thereof. Further, the rear portion (dash panel 6 side) 11f of the reinforcing cover member 11 is in contact with both edge portions so as to slightly protrude from the upper surface side of the intermediate portion of the side bars 10a and 10b. The central portion 11g of the reinforcing cover member 11 is formed in a concave shape along the vehicle front-rear direction.

  As described above, the reinforcing cover member 11 is disposed at the inner central portion of the triangular tower bar formed by the strut tower bar 8 and the side bars 10a and 10b, and the triangular tower bar and the reinforcing cover are arranged. A space is provided between the side portions 11b and 11c and the rear portion 11f of the member 11.

  As shown in FIG. 3, bolt insertion holes 11 h and 11 i are formed in both edge portions of the front portion 11 a of the reinforcing cover member 11, and two pieces provided inside the intermediate portion of the strut tower bar 8. The flanges 12 and 13 are also formed with bolt insertion holes 12a and 13a. The overlapped reinforcing cover member 11 and the bolt insertion holes 11h and 12a of the flanges 12 and 13 of the strut tower bar 8 and the bolt insertion holes 11i. , 13a are respectively inserted through bolts 14 and fastened and fixed by nuts 15.

  Similarly, bolt insertion holes 11j and 11k are formed in both edge portions of the rear portion 11f of the reinforcing cover member 11, and flanges 16 provided on the side bars 10a and 10b (the flange portion on the side bar 10b side is (Not shown) is formed with a bolt insertion portion 16b in which a notch portion 16a is integrally formed. The overlapped reinforcing cover member 11 and bolt insertion holes 11j of the flanges 16 of the side bars 10a and 10b, the bolt insertion portion. 16b, bolt insertion hole 11k, and bolt insertion portion (not shown) are passed through bolts 17 and fixed by nuts 18 respectively. In addition, the notch 16a formed in the flange 16 of the side bars 10a and 10b opens toward the rear side in the vehicle front-rear direction.

  In the vehicle 1 having the vehicle body stiffening structure according to the above-described embodiment, the vehicle width of the strut towers 4a and 4b is provided by the strut tower bar 8 connected between the upper surfaces 4c and 4d of the left and right strut towers 4a and 4b. The strut towers 4a, 4b can be suppressed by the side bars 10a, 10b connected between both ends of the strut tower bar 8 and the center of the dash panel 7 in the vehicle width direction. The displacement in the vehicle longitudinal direction can be suppressed.

  As described above, the triangular tower bar formed by the strut tower bar 8 and the side bars 10a and 10b suppresses the displacement of the strut towers 4a and 4b in the vehicle width direction and the vehicle front-rear direction, and the rigidity of the vehicle front portion. Can be increased.

  Further, the reinforcing cover member 11 is fixed to the inner center portion of the triangular tower bar formed by the strut tower bar 8 and the side bars 10a and 10b, and the flange portions are integrally formed on both sides of the reinforcing cover member 11. By forming the portions 12 and 13 so as to be positioned between the intermediate portion of the strut tower bar 8 and the intermediate portions of the side bars 10a and 10b, the strut tower bar 8 and the side bars 10a and 10b are formed. The rigidity of the triangular tower bar itself can be improved, and the rigidity of the front portion of the vehicle can be further increased.

  Therefore, even when a torsional input is generated from the front wheel suspension, it is possible to suppress the displacement of the strut tower bar 8 and the side bars 10a and 10b.

  Further, when a large impact force of a predetermined value or more is applied to the front part of the vehicle and is deformed to the vicinity of the strut towers 4a and 4b at the time of the front collision of the vehicle, the rear part of the reinforcing cover member 11 is caused by the impact applied to the strut tower bar 8. Bolts 17 that fix both side portions of 11f are disengaged from the notch portion 16a of the flange portion 16 to the rear side in both front and rear directions. As a result, the connection between the both side portions of the rear portion 11f of the reinforcing cover member 11 and the side bars 10a and 10b is released, and the rigidity of the triangular tower bar formed by the strut tower bar 8 and the side bars 10a and 10b is reduced. To do.

  Therefore, when a large impact force of a predetermined value or more is applied to the front part of the vehicle at the time of frontal collision, the middle part of the side bars 10a and 10b is deformed so as to be bent, and the rear side in the vehicle front-rear direction (vehicle compartment 6 side). Thus, the dash panel 7 is prevented from moving backward into the vehicle compartment 6.

  Further, as described above, the reinforcing cover member 11 is arranged not on the entire inner surface of the triangular tower bar formed by the strut tower bar 8 and the side bars 10a and 10b, but on the inner central portion of the triangular tower bar. It is installed. Thus, without removing the reinforcing cover member 11, it is positioned below the strut tower bar 8 through the space formed between the triangular tower bar and the side portions 11b and 11c and the rear portion 11f of the reinforcing cover member 11. Inspection and maintenance of the engine to be performed can be performed easily.

  According to the experiment of the present inventor, the rigidity is improved when a flat reinforcing cover is provided on the entire inner surface of the triangular tower bar formed by the strut tower bar 8 and the side bars 10a and 10b. When the reinforcing cover member 11 having the rib portions 11d and 11e on both sides is provided at the inner central portion of the triangular tower bar formed by the strut tower bar 8 and the side bars 10a and 10b as in the present invention. The improvement in the rigidity was approximately the same.

  In the above-described embodiment, the rib portions 11d and 11e are integrally formed on both sides of the reinforcing cover member 11 made of a resin material. However, the present invention is not limited to this, and for example, on both sides by insert molding. A reinforcing cover member provided with metal ribs may be used.

The schematic perspective view which shows the vehicle body front part of the vehicle which has the vehicle body stiffening structure which concerns on embodiment of this invention. AA sectional view taken on the line AA of FIG. 1 is an exploded perspective view of a vehicle body stiffening structure according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Engine room 4a, 4b Strut tower 5a, 5b Front side member 6 Car compartment 7 Dash panel 8 Strut tower bar 10a, 10b Side bar 11 Reinforcement cover member 11d, 11e Rib part 16 Flange 16a Notch part 16b Bolt insertion part

Claims (2)

A strut tower bar extending in the vehicle width direction is connected between the left and right strut towers that support the upper end of the strut of the front wheel suspension, and a pair of reinforcing side bars at the vehicle longitudinal direction rear side at both ends of the strut tower bar. One end side of each of the pair of side bars, and the other end side of the pair of side bars are connected to a center portion of a dash panel that partitions the engine room and the vehicle compartment, and the strut tower bar and the pair of side bars are triangular. In the vehicle body stiffening structure that formed the shape tower bar,
The front part of the front side in the vehicle front-rear direction is in contact with the middle part in the vehicle width direction of the strut tower bar inside the triangular tower bar formed by the strut tower bar and the pair of side bars. A planar reinforcing cover member is fixed so that both edge sides of the rear portion are in contact with an intermediate portion of the pair of side bars, and ribs are provided along the longitudinal direction on both sides in the vehicle width direction of the reinforcing cover member. The
Body stiffening structure characterized by that. Both ends of the rear portion of the rear side of the reinforcing cover member in the vehicle front-rear direction are fastened and fixed by nuts by inserting bolts into bolt insertion portions of flanges provided at intermediate portions of the pair of side bars. The insertion part is integrally formed with a notch that opens toward the rear side in the vehicle longitudinal direction.
The vehicle body stiffening structure according to claim 1.

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