JP6520525B2 - Vehicle front structure - Google Patents

Description

  The present invention relates to a vehicle front structure.

  There is a rocker (side sill) including a rocker inner panel, a rocker outer panel disposed on the vehicle width direction outer side of the rocker inner panel, and a reinforcing member provided between the front of the rocker inner panel and the rocker outer panel (eg, patent Reference 1).

  The front end portion of the reinforcing member disclosed in Patent Document 1 is formed with an inclined surface which is inclined outward in the vehicle width direction as it goes to the rear of the vehicle. This inclined surface guides the front wheel, which has moved to the rear of the vehicle in response to a frontal collision of the vehicle (hereinafter referred to as “front collision”), to the outside in the vehicle width direction. Thereby, the crash stroke until the collision load is transmitted from the front wheel to the cabin via the rocker is lengthened. At the front end portion of the rocker outer panel, a bead is formed to make the front end portion easily crushed in contact with the front wheel.

Unexamined-Japanese-Patent No. 5-85414

  However, in the vehicle as disclosed in Patent Document 1, there is room for further improvement in order to suppress the front wheel from intruding inward in the vehicle width direction of the rocker accompanying the frontal collision.

  An object of the present invention is to provide a vehicle front structure capable of suppressing the front wheel from intruding inward in the vehicle width direction of the rocker with a front collision, in consideration of the above-mentioned facts.

The vehicle front structure according to the first aspect includes a front wheel disposed on a side portion of the vehicle front, a rocker outer panel disposed along the longitudinal direction of the vehicle behind the front wheel, and a vehicle width direction of the rocker outer panel. A rocker having a rocker inner panel disposed inside and forming a closed cross section with the rocker outer panel, and disposed within the closed cross section of the rocker, joined to the rocker outer panel, and having a front end portion in front and rear of the vehicle And a reinforcing member which coincides with the front end of the rocker outer panel and extends in the vehicle width direction, and the outer portion in the vehicle width direction at the front portion where the rocker outer panel and the reinforcing member overlap in plan view The strength is lower than the inner side in the width direction.

According to the vehicle front structure relating to the first aspect , the reinforcing member is disposed in the closed cross section of the rocker. The reinforcing member is joined to the rocker outer panel, and the front end coincides with the front end of the rocker outer panel in the longitudinal direction of the vehicle and extends in the vehicle width direction. The front part of the rocker outer panel is reinforced by this reinforcing member. On the other hand, the outer portion in the vehicle width direction outer side at the front portion of the rocker outer panel and the reinforcing member is lower in strength than the inner portion in the vehicle width direction. In other words, the inner portion in the front portion where the rocker outer panel and the reinforcing member overlap in plan view has a higher strength than the outer portion.

  Thus, for example, when the wheel outer rim in the vehicle width direction outer side of the front wheel contacts the outer side portion of the rocker outer panel and the reinforcing member toward the vehicle rear and the vehicle width direction inward with the front collision, the outer side The parts are deformed, and the wheel outer rim is hooked on the inner parts of the rocker outer and the reinforcing member, which have higher strength than the outer parts. As a result, the collision load is transmitted from the wheel outer rim to the rocker panel through the rocker outer and the inner portion of the reinforcing member. That is, in the present invention, the front wheel moved rearward in the vehicle and inward in the vehicle width direction with the front collision can be received by the rocker outer, the reinforcing member and the rocker panel. Therefore, it is suppressed that the front wheel intrudes inward in the vehicle width direction of the rocker with the front collision.

  As described above, according to the vehicle front structure relating to the present invention, it is possible to suppress the front wheel from intruding inward in the vehicle width direction of the rocker due to the front collision.

It is the top view which looked at the side part of the cross direction one side in the vehicles cross direction in the vehicles front part where the vehicles front structure concerning one embodiment was applied from the vehicles upper part. It is a disassembled perspective view of the rocker shown by FIG. It is a top view corresponding to Drawing 1 showing a rocker concerning a comparative example.

  Hereinafter, a vehicle front structure according to an embodiment of the present invention will be described with reference to the drawings. In addition, arrow FR suitably shown in each figure has shown the vehicle front (vehicle front-back direction front), and arrow UP has shown the vehicle upper direction (vehicle vertical direction upper side). Further, the arrow OUT indicates the outer side in the vehicle width direction (the left side when facing the front of the vehicle). Moreover, front and rear, upper and lower and left and right in the following description mean front and rear in the longitudinal direction of the vehicle, upper and lower in the vertical direction of the vehicle, and left and right in the vehicle width direction unless otherwise noted.

  FIG. 1 shows a side portion on one side (left side) in the vehicle width direction of the vehicle front portion 12 to which the vehicle front structure 10 according to the present embodiment is applied. The vehicle front structure 10 includes a front wheel 14 and a rocker 30.

  The front wheels 14 are respectively provided on both sides of the front portion 12 of the vehicle. Each front wheel 14 has a rubber tire 16 and a metal wheel 18 fitted inside the tire 16. The wheel 18 is rotatably supported by a lower arm (suspension arm) 20 connected to a suspension member (not shown). A rocker 30 is disposed behind the front wheel 14 in the vehicle.

  The rocker 30 is a metal frame member that constitutes a lower frame at the vehicle side. The rocker 30 is disposed between the front end portion and the front wheel 14 at an interval in the vehicle front-rear direction. Further, the rocker 30 has a closed cross-sectional shape in a front view of the vehicle.

  Specifically, the rocker 30 has a rocker outer panel 34, a rocker panel 32 and a reinforcing member 40. The rocker outer panel 34 is disposed rearward of the front wheel 14 in the longitudinal direction of the vehicle. As shown in FIG. 2, the rocker outer panel 34 is formed in a hat shape in cross section in which the inside in the vehicle width direction is open. The rocker outer panel 34 also has an outer wall 34A, an upper wall 34B, a lower wall 34C, and a pair of upper and lower flanges 34D. A rocker panel 32 is disposed on the inner side in the vehicle width direction of the rocker outer panel 34.

  The rocker panel 32 is formed in a hat shape in cross section in which the outer side in the vehicle width direction is open. The rocker panel 32 includes an inner side wall 32A, an upper wall 32B, a lower wall 32C, and a pair of upper and lower flanges 32D. A rocker outer panel 34 is disposed outside the rocker panel 32 in the vehicle width direction. The rocker panel 32 and the rocker outer panel 34 are joined by welding or the like in a state in which the upper and lower flange portions 32D and 34D are overlapped. Thus, a closed cross section is formed by the rocker panel 32 and the rocker outer panel 34. The reinforcing member 40 is disposed in the closed cross section of the rocker 30.

  The reinforcing member 40 is, for example, a panel-like shoulder patch bent along the outer wall 34A and the upper wall 34B of the rocker outer panel 34. The reinforcing member 40 has an outer wall 40A and an upper wall 40B joined to the outer wall 34A and the upper wall 34B of the rocker outer panel 34 by welding or the like.

  As shown in FIG. 1, the front end 40F on the vehicle front side of the reinforcing member 40 and the front end 34F on the vehicle front side of the rocker outer panel 34 are aligned in the vehicle longitudinal direction in a plan view of the vehicle . Further, the reinforcing member 40 is extended in the vehicle width direction. The front portion of the rocker outer panel 34 is reinforced by the reinforcing member 40. Thereby, the strength of the rocker outer panel 34 described later and the inner portion W2 of the reinforcing member 40 is secured.

  The front end 40F of the reinforcing member 40 and the front end 34F of the rocker outer panel 34 indicate that the positions of the front end 40F of the reinforcing member 40 and the front end 34F of the rocker outer panel 34 coincide with each other in plan view of the vehicle. The front end 40F of the reinforcing member 40 and the rocker not only when the position of the vehicle completely agrees in the longitudinal direction of the vehicle but also due to the manufacturing error of the reinforcing member 40 and the rocker outer panel 34 or the assembling error of the reinforcing member 40 and the rocker outer panel 34 This is a concept including a state in which the position of the front end 34F of the outer panel 34 is slightly deviated in the longitudinal direction of the vehicle.

  Here, through holes 36 and 42 as fragile portions are respectively formed in the front portion on the vehicle front side where the rocker outer panel 34 and the reinforcing member 40 overlap in a plan view. Specifically, a circular through hole 36 is formed in a central portion in the vehicle width direction of the upper wall portion 34B at the front portion of the rocker outer panel 34. Further, in the vicinity of the center in the vehicle width direction of the upper wall portion 40B at the front portion of the reinforcing member 40, a rectangular through hole 42 whose long side is the vehicle longitudinal direction is formed.

  The through holes 36 and 42 have the same or substantially the same length L (hereinafter, also referred to as “lateral width”) L in the vehicle width direction, and are arranged to overlap each other in a plan view of the vehicle. The strength of the outer portion W1 of the rocker outer panel 34 and the reinforcing member 40 in the vehicle width direction outer side is lower than the strength of the inner portion W2 of the rocker outer panel 34 and the reinforcing member 40 in the vehicle width direction by these through holes 36 and 42. It is considered to be strong.

  More specifically, the outer portion W1 of the rocker outer panel 34 and the reinforcing member 40 positioned on the outer side in the vehicle width direction bordering on the inner edge portions 36A and 42A on the inner side in the vehicle width direction of the through holes 36 and 42 The strength is lower than that of the rocker outer panel 34 and the inner portion W2 of the reinforcing member 40 located at In other words, the inner portion W2 of the rocker outer panel 34 and the reinforcing member 40 is higher in strength than the outer portion W1 of the rocker outer panel 34 and the reinforcing member 40.

  Further, as shown in FIG. 1, the lateral width L of the through holes 36 and 42 is wider than the rim width D of the wheel outer rim 18A on the vehicle width direction outer side of the wheel 18. As a result, the wheel outer rim 18A easily contacts the front side portions 34BF, 40BF of the rocker outer panel 34 and the reinforcing members 40 on the front side of the through holes 36, 42 in accordance with the frontal collision.

  Next, the operation of the present embodiment will be described.

  First, in order to clarify the operation of the present embodiment, a comparative example will be described. As shown in FIG. 3, the through holes 36 and 42 (see FIG. 1) in the present embodiment are not formed in the front portions of the rocker outer panel 34 and the reinforcing member 40 in the comparative example. Therefore, in the comparative example, the outer side portions of the rocker outer panel 34 and the reinforcing member 40 have higher strength than the outer side portion W1 (see FIG. 1) of the rocker outer panel 34 and the reinforcing member 40 in the present embodiment. In FIG. 3, the moving state of the wheel outer rim 18A at the time of the frontal collision is shown in chronological order by two-dot chain lines 18A1, 18A2, 18A3.

  In this comparative example, the wheel outer rim 18A of the front wheel 14 is displaced as indicated by the two-dot chain line 18A1 with the frontal collision, with respect to the front end portions 34F and 40F of the outer portions of the rocker outer panel 34 and the reinforcing member 40. When the vehicle contacts rearward and inward in the vehicle width direction, the following may occur.

  That is, the wheel outer rim 18A slides inward in the vehicle width direction along the rocker outer panel 34 and the front end portions 34F, 40F of the reinforcing member 40 (arrow a), and as shown by the two-dot chain line 18A2, The front end 32F is caught from the outside in the vehicle width direction. In this case, the front end 32F of the rocker panel 32 peels inward in the vehicle width direction from the rocker outer panel 34, as indicated by a two-dot chain line, and inward in the vehicle width direction of the wheel outer rim 18A (front wheel 14) The amount of penetration of

  On the other hand, in the present embodiment, as shown in FIG. 1, through holes 36 and 42 as fragile portions are respectively formed in the front of the rocker outer panel 34 and the reinforcing member 40. More specifically, through holes 36 and 42 are respectively formed in the upper wall 34 B of the rocker outer panel 34 and the upper wall 40 B of the reinforcing member 40. As a result, the outer portion W1 of the rocker outer panel 34 and the reinforcing member 40 has lower strength than the inner portion W2 with the inner edge portions 36A and 42A of the through holes 36 and 42 as boundaries. In FIG. 1, the moving state of the wheel outer rim 18A at the time of front collision is shown in chronological order by two-dot chain lines 18A1 and 18A2.

  Thus, for example, the wheel outer rim 18A of the front wheel 14 with respect to the frontal collision as shown by the two-dot chain line 18A1 with respect to the front end portions 34F and 40F of the rocker outer panel 34 and the outer portion W1 of the reinforcing member 40 When it contacts back and inward in the vehicle width direction, the following occurs.

  In other words, the outer portion W1 of the rocker outer panel 34 and the reinforcing member 40 is deformed (collapsed deformed) rearward with respect to the through holes 36 and 42, and has higher strength than the outer portion W1 as shown by the two-dot chain line 18A2. The wheel outer rim 18A is hooked on the inner side W2 of the rocker outer panel 34 and the reinforcing member 40. As a result, a collision load is transmitted from the wheel outer rim 18A to the rocker panel 32 via the rocker outer panel 34 and the inner portion W2 of the reinforcing member 40. That is, in this embodiment, the wheel outer rim 18A moved rearward in the vehicle and inward in the vehicle width direction with the front collision can be received by the rocker outer panel 34, the reinforcing member 40 and the rocker panel 32. Therefore, it is suppressed that the front wheel 14 (wheel 18) intrudes into the vehicle width direction inner side of the rocker 30 with a front collision.

  As described above, in the present embodiment, the behavior of the front wheel 14 inward in the vehicle width direction at the time of a frontal collision can be limited. Thereby, the reinforcement range of the cabin can be narrowed as compared with a configuration in which the behavior of the front wheel 14 inward in the vehicle width direction at the time of a frontal collision is not limited. Therefore, the cabin can be efficiently reinforced. In particular, in the present embodiment, the behavior of the front wheel 14 inward in the vehicle width direction is effectively limited in the case of a small wrap collision in which the collision body collides with the front side member outside the vehicle front in the vehicle width direction Can.

  Further, in the present embodiment, the lateral width L of the through holes 36 and 42 is wider than the rim width D of the wheel outer rim 18A. Therefore, in the present embodiment, the wheel outer rim 18A moved rearward and inward in the vehicle width direction with the front collision is the front side portion 34BF of the front side of the through holes 36 and 42 in the rocker outer panel 34 and the reinforcing member 40. It becomes easy to contact 40BF.

  Here, the front side portions 34BF and 40BF are easily crushed toward the through holes 36 and 42 due to the contact with the wheel outer rim 18A. Therefore, as described above, the width L of the through holes 36 and 42 is wider than the rim width D of the wheel outer rim 18A, and the wheel outer rim 18A easily contacts the front side portions 34BF and 40BF. The wheel outer rim 18A can be easily caught by the rocker outer panel 34 and the inner portion W2 of the reinforcing member 40. Therefore, it can be further suppressed that the front wheel 14 intrudes inward in the vehicle width direction of the rocker 30 with the front collision.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to such Embodiment, You may use it combining suitably one Embodiment and various modifications, The summary of this invention Of course, various modifications can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 10 Vehicle front structure 12 Vehicle front 14 Front wheel 30 Rocker 32 Rockinna panel 34 Rocker outer panel 34F front end (front end of rocker outer panel)
40 Reinforcement member 40F front end (front end of reinforcement)
W1 outer part (outside part in the vehicle width direction outer part at the front where the rocker outer panel and the reinforcing member overlap in plan view)
W2 inner part (inner part in the vehicle width direction at the front where the rocker outer panel and the reinforcement member overlap in plan view)

Claims (1)

Front wheels disposed on the front side of the vehicle;
A rocker having a rocker outer panel disposed along the longitudinal direction of the vehicle at the rear of the front wheel and a rocker member panel disposed inward in the vehicle width direction of the rocker outer panel and forming a closed cross section with the rocker outer panel; ,
A reinforcing member disposed within the closed cross section of the rocker, joined to the rocker outer panel, and having a front end portion coinciding with a front end portion of the rocker outer panel in the vehicle longitudinal direction and extending in the vehicle width direction;
Equipped with
In the front portion where the rocker outer panel and the reinforcing member overlap in plan view, a through hole is formed which overlaps each other in plan view , and in the front portion, the portion where the through hole is formed is the vehicle width direction of the through hole. Lower strength than the inner side,
Vehicle front structure.

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