JP2012148745A - Front vehicle-body structure for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front vehicle-body structure for an automobile that surely transmits input during a vehicle collision from an apron member to the vehicle-body rear part via a front pillar without causing an increase in vehicle-body weight and costs.SOLUTION: At least a joint of an apron member 3 in a front pillar 4 is arranged with a pillar reinforcement 16 having a plurality of longitudinal walls 16c, 16d extending in a direction of closing a space between a pillar outer panel 14 and a pillar inner panel 15. The part near the joint of the apron member 3 on the pillar inner panel 15 is formed with a bead 15f having a plurality of longitudinal walls 15g, 15h protruding into the front pillar 4. The longitudinal walls 15g, 15h of the bead 15f are adjacent to the longitudinal walls 16c, 16d of the reinforcement 16.

Description

  The present invention relates to a front body structure of an automobile in which an input at the time of a vehicle collision is transmitted from an apron member to a rear portion of the vehicle body via a front pillar.

  The automobile employs a structure that avoids the influence on the passenger compartment by enhancing the energy absorption function in the event of a vehicle collision. For example, in Patent Document 1, the input at the time of a vehicle collision is distributed and transmitted from the apron member to the roof rail and the rocker panel via the front pillar, and is also transmitted to the belt line rein hose of the front door. An energy absorbing structure is disclosed.

JP 2001-334955 A

  By the way, in the conventional structure, when the front pillar collapses at the time of a vehicle collision, there is a concern that the input from the apron member cannot be effectively transmitted from the front pillar to the rear part of the vehicle body. In order to prevent the front pillar from collapsing, it may be possible to add a load transmission member such as a bulkhead to the front pillar or increase the thickness of the front pillar. The problem of increased weight and cost arises.

  The present invention has been made in view of the above-described conventional situation, and is an automobile that can reliably transmit the input at the time of a vehicle collision from the apron member to the rear portion of the vehicle body via the front pillar without causing an increase in vehicle body weight and cost. An object is to provide a front body structure.

The present invention relates to a front pillar formed by joining a pillar outer panel and a pillar inner panel so as to form a substantially hollow shape, and an apron member extending in the vehicle front-rear direction and having a rear end portion coupled to a midway portion in the vertical direction of the front pillar. And
A pillar rein hose having a plurality of vertical walls extending in a direction of closing between the pillar outer panel and the pillar inner panel is disposed at least in the apron member coupling portion in the front pillar. A vehicle front body structure that transmits input from the apron member to the rear of the vehicle body via a front pillar and a pillar rein hose,
A bead having a plurality of vertical walls protruding into the front pillar is formed in a portion of the pillar inner panel in the vicinity of the joining portion of the apron member, and at least one of the vertical walls of the bead is formed on the pillar rein hose. It is characterized by being in contact with or close to at least one of the vertical walls.

  According to the front vehicle body structure of the present invention, the bead is formed in the front pillar in the vicinity of the apron member coupling portion of the pillar inner panel, and at least one of the vertical walls formed on the bead is used as the pillar rein hose. Since it is in contact with or close to at least one of the formed vertical walls, the input from the apron member at the time of the vehicle collision is received by the vertical wall of the pillar rein hose and the vertical wall of the bead abutting each other. It is reliably transmitted to the rear part of the vehicle body via the bead. As a result, the load can be effectively transmitted to the rear portion of the vehicle body without causing the front pillar to collapse, and the influence on the passenger compartment can be avoided.

  In the present invention, since the bead is formed in the pillar inner panel so as to enter the front pillar, the cross-sectional rigidity of the front pillar can be increased, and the surface rigidity of the pillar inner panel itself can be increased. Thereby, it is possible to prevent the front pillar from collapsing in the event of a vehicle collision, and to more reliably transmit the load to the rear part of the vehicle body.

  In the present invention, since the bead is formed only on the pillar inner panel, it is possible to avoid an increase in weight and cost as in the case where the bulkhead described above is added or the thickness of the pillar inner panel is increased. , Can contribute to weight reduction and cost reduction.

  Here, in the present invention, to make the vertical wall of the bead close to the vertical wall of the pillar rein hose means that the two may be separated to the extent that the above-described effect of improving the load transmission can be obtained.

1 is a side view of a front body of an automobile according to Embodiment 1 of the present invention. It is sectional drawing (II-II sectional view taken on the line of FIG. 1) of the said front vehicle body. FIG. 3 is a cross-sectional view of the front vehicle body (a cross-sectional view taken along line III-III in FIG. 1). It is a schematic side view of the front vehicle body. It is a side view of the front vehicle body of the motor vehicle by Example 2 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 4 are views for explaining a front body structure of an automobile according to a first embodiment of the present invention.

  In the figure, reference numeral 1 denotes a front body of an automobile. The front vehicle body 1 includes left and right front pillars 4 and 4 extending in the vehicle vertical direction, and left and right front ends 4a extending in the vehicle front-rear direction and a rear end portion 3a coupled to the middle portion of the front pillar 4 in the vertical direction. The apron members 3 and 3 are provided.

  The front body 1 includes left and right side members 2 and 2 extending in the longitudinal direction of the vehicle, coupling members 5 and 5 for coupling the left and right side members 2 and the apron member 3, and the left , A cowl panel 7 disposed so as to connect the right apron member 3, and a dash panel (not shown) that defines the front vehicle body 1 into an engine compartment A and a compartment B.

  A strut tower 6 is disposed on the inner side of the left and right apron members 3, and the strut tower 6 is coupled to the apron member 3 at its upper end and to the side member 2 at its lower end.

  The front end of the roof rail 8 extending in the vehicle front-rear direction is joined to the upper ends of the left and right front pillars 4, and the front end of the rocker panel 9 extending in the vehicle front-rear direction is joined to the lower end. ing.

  In addition, a center pillar 12 is disposed behind the front pillar 4 and is coupled to the roof rail 8 and the rocker panel 9 so as to form a front door opening 1a. A front door 19 supported by the front pillar 4 is disposed in the front door opening 1a so as to be openable and closable (see FIG. 2).

  The front door 19 has a structure in which a belt line rein hose 21 extending in the vehicle front-rear direction along the belt line is disposed in a door body 20 formed by joining the door outer panel 20a and the door inner panel 20b so as to form a hollow shape. Have

  The belt line rein hose 21 is disposed so as to be substantially at the same height as the apron member 3 and is disposed so as to overlap the rear end portion 3a of the apron member 3 when viewed in the front-rear direction.

  The left and right apron members 3 have a structure in which an outer member 10 and an inner member 11 are coupled to form a closed cross section. The rear end portion 10e of the outer member 10 is coupled to the pillar outer panel 14 of the front pillar 4, and the rear end portion 11e of the inner member 11 is coupled to the pillar inner panel 15 together with the flange portion 7d of the cowl panel 7. Has been.

  The front pillar 4 is formed by joining the front outer flange portions 14a and 15a and the rear flange portions 14b and 15b of the pillar outer panel 14 having a substantially hat-shaped cross section and the pillar inner panel 15 having a substantially flat plate shape by welding. It has a structure in which a square cylindrical closed cross section is formed.

  A pillar rein hose 16 having a generally hat-shaped cross section is disposed in the front pillar 4. The pillar rein hose 16 has a length that covers substantially the entire length of the front pillar 4, and is disposed so as to face the rear end portion 3 a of the apron member 3 in the vehicle front-rear direction.

The pillar rein hose 16 is disposed so as to surround the rear half of the front pillar 4 and extends forward and rearward so as to close the space between the pillar outer panel 14 and the pillar inner panel 15 in the vehicle width direction. Side vertical walls 16c, 16d and outer walls 16e integrally formed so as to connect the outer edges of the front and rear vertical walls 16c, 16d.

  A front flange portion 16a formed on the front vertical wall 16c of the pillar rein hose 16 is joined to a middle portion in the front-rear direction of the pillar inner panel 15 by welding, and a rear flange portion formed on the rear vertical wall 16d. Three 16b are overlapped and joined to the rear flange portions 14b and 15b by welding.

  Thus, the front pillar 4 is divided into a buckling area D in the front half where the pillar rein hose 16 is not disposed and a load transmission area E in the rear half where the pillar rein hose 16 is disposed. Yes.

  Further, the end portion of the PP member 23 extending in the vehicle width direction is fixed to the overlapping portion of the rear flange portions 14b, 15b, 16b of the left and right front pillars 4 with bolts.

  The pillar inner panel 15 is formed with a bead 15 f protruding into the front pillar 4. The bead 15f is formed so as to be recessed on the vehicle outer side so as to enter the load transmission area E of the pillar rein hose 16.

  The bead 15f is positioned between the apron member 3 and the beltline reinhose 21 and is disposed at substantially the same height as the apron member 3 and the beltline reinhose 21.

  The bead 15f is a rectangular having front and rear vertical walls 15g and 15h, and upper and lower vertical walls 15i and 15j connecting the upper and lower vertical walls 15g and 15h. It is of shape.

  The front vertical wall 15g of the beat 15f is close to the front vertical wall 16c of the pillar reinhose 16, and the rear vertical wall 15h is close to the rear vertical wall 16d.

  The input F at the time of a vehicle collision is transmitted rearward through the axis of the side member 2 as shown by an arrow in FIG. 1, and is transmitted from the side member 2 to the apron member 3 through the coupling member 5, It is transmitted from the apron member 3 to the front pillar 4. The load transmitted to the front pillar 4 is transmitted to the pillar rein hose 16 in the load transmission area E while being absorbed in the buckling area D, and is transmitted from the pillar rein hose 16 to the belt line rein hose 21 via the beads 15f. While being distributed and transmitted, it is distributed and transmitted to the roof rail 8 and the rocker panel 9. Specifically, the load transmitted from the vertical wall 16c on the front side of the pillar rein hose 16 to the vertical wall 15g on the front side of the bead 15f passes along the ridgelines L of the upper and lower vertical walls 15i and 15j on the rear side of the bead 15f. Is transmitted from the vertical wall 15h to the vertical wall 16d on the rear side of the pillar rein hose 16, and is distributed and transmitted to the roof rail 8, the rocker panel 9, and the belt line rein hose 21 from here.

  Thus, according to the present embodiment, the bead 15f is formed in the vicinity of the rear end 3a of the apron member 3 of the pillar inner panel 15 so as to protrude into the front pillar 4, and the front and rear sides of the bead 15f. Since the vertical walls 15g and 15h are placed close to the front and rear vertical walls 16c and 16d of the pillar rein hose 16, the input from the apron member 3 at the time of the vehicle collision is the front and rear sides of the pillar rein hose 16. The vertical walls 16c and 16d and the vertical walls 15g and 15h on the front and rear sides of the beads 15f come into contact with each other. Will be. As a result, the load can be effectively transmitted to the rear portion of the vehicle body without causing the front pillar 4 to collapse, and the influence on the passenger compartment can be avoided.

  In this embodiment, the bead 15f is formed in the pillar inner panel 15 so as to enter the pillar inner hose 16, so that the cross-sectional rigidity of the front pillar 4 can be increased and the surface rigidity of the pillar inner panel 15 itself is increased. be able to. Thereby, it is possible to prevent the front pillar 4 from collapsing in cross section at the time of a vehicle collision, and to transmit the load to the beltline reinhose 21 and the like more reliably.

  In the present embodiment, the above-mentioned effect can be realized by adding the structure by simply forming the beads 15f to the pillar inner panel 15, so that the bulkhead described above can be added or the thickness of the pillar inner panel can be increased. The weight and cost increase as in the case of doing so can be avoided, contributing to weight reduction and cost reduction.

  In the first embodiment, the front and rear vertical walls 15g and 15h of the bead 15f are close to the front and rear vertical walls 16c and 16d of the pillar rein hose 16, but in the present invention, at least the beads One vertical wall may be brought close to at least one vertical wall of the pillar rein hose.

  Moreover, in the said Example 1, although the case where the bead 15f was formed in the load transmission area E side of the pillar rein hose 16 was demonstrated to the example, the bead of this invention is not restricted to this.

  FIG. 5 is a view for explaining a front vehicle body according to a second embodiment of the present invention, in which the same reference numerals as those in FIG. 1 denote the same or corresponding parts.

  In the present embodiment, the aforementioned bead 15f protruding into the load transmission area E is formed on the pillar inner panel 15, and the second bead 15k protruding into the buckling area D is formed in parallel. The vertical wall 15m on the rear side of the second bead 15k is close to the vertical wall 16c on the front side of the pillar rein hose 16 (see the two-dot chain line in FIG. 2).

  In this embodiment, since the bead 15f and the second bead 15k are formed in parallel, the input from the apron member 3 is transmitted from the second bead 15k to the bead 15f via the pillar rein hose 16. The load transmission can be performed more efficiently.

  Further, by adjusting the size of the second bead 15k provided in the buckling area D, the amount of energy absorbed by the buckling of the buckling area D can be controlled.

  In the above embodiment, the case where the input is dispersed from the front pillar to the roof rail, the rocker panel, and the beltline rein hose has been described. However, in the present invention, the input can be dispersed only from the front pillar to the roof rail, the rocker panel. In this case, a beltline rein hose can be dispensed with.

  Only the second bead 15k may be formed, and the pillar rein hose 16 may be disposed further forward than in the case of FIG. 2, and a bead may be formed behind the pillar rein hose disposed forward, You may make the vertical wall of the front side of a bead adjoin to the vertical wall of the rear side of the pillar arrangement hose of the front arrangement.

  Furthermore, the vertical wall of the bead and the vertical wall of the rein hose may be brought into contact with each other.

1 Front body 3 Apron member 3a Rear end (joint)
4 Front pillar 14 Pillar outer panel 15 Pillar inner panel 15 f, 15 k Bead 15 g, 15 h, 15 m Bead vertical wall 16 Pillar rein hose 16 c, 16 d Rein hose vertical wall

Claims (1)

A front pillar formed by connecting a pillar outer panel and a pillar inner panel so as to form a substantially hollow shape;
An apron member extending in the longitudinal direction of the vehicle and having a rear end portion coupled to a midway portion in the vertical direction of the front pillar,
A pillar rein hose having a plurality of vertical walls extending in a direction of closing between the pillar outer panel and the pillar inner panel is disposed at least at the joint portion of the apron member in the front pillar.
A front vehicle body structure of an automobile configured to transmit input from the front of the vehicle from the apron member to the rear of the vehicle body via a front pillar and a pillar rein hose,
A bead having a plurality of vertical walls protruding into the front pillar is formed in the vicinity of the coupling portion of the apron member of the pillar inner panel,
At least one of the vertical walls of the bead is in contact with or close to at least one of the vertical walls of the pillar rein hose.

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