JP6413992B2 - Vehicle end structure - Google Patents

Description

  The present invention relates to a vehicle end structure.

  Among vehicle collision modes, a vehicle front structure that takes into account a minute lap collision is disclosed (see Patent Document 1). The micro lap collision is a form in which the vehicle collides with an opponent vehicle or the like (hereinafter referred to as “barrier”) outside the side member in the vehicle width direction.

  In this structure, bumper reinforcement is provided at the front end of the front side member, and a spacer is provided between the front side member and the overhanging portion of the bumper reinforcement that protrudes outward in the vehicle width direction from the front end of the front side member. Is provided. A plate member (hereinafter referred to as “extension portion”) is provided at the front end of the spacer. The extending portion abuts against the back surface of the bumper reinforcement at the vertical wall portion, and covers a part of the upper surface and a part of the lower surface of the bumper reinforcement at the flange.

JP 2005-16729 A

  In the above-described conventional example, it is conceivable that the position of the end of the bumper reinforcement is set, for example, at the front end of the front side member to reduce the overhang of the bumper reinforcement. In this case, a part of the extension part remains as an extension part extending outward in the vehicle width direction from the end part of the bumper reinforcement. As a means for further improving the rigidity of the overhanging portion, it is conceivable to increase the length of the vertical wall portion in the vehicle vertical direction, widen the space between the upper and lower flanges, and increase the section modulus.

  However, when the interval between the overhang portions is increased over the entire extension portion, the flange is separated from a part of the upper surface and a part of the lower surface of the bumper reinforcement. If it does so, it will become difficult to suppress the deformation | transformation of the bumper reinforcement at the time of a collision with a flange.

  An object of the present invention is to obtain a vehicle end structure capable of achieving both suppression of deformation of bumper reinforcement at the time of a minute lap collision and improvement of bending rigidity of an overhang portion at an extension portion.

  The vehicle end portion structure according to claim 1 is a bumper reinforcement that connects a pair of left and right side members extending in the vehicle front-rear direction at an end portion in the vehicle front-rear direction and the tip portions of the pair of left and right side members in the vehicle width direction. , A spacer coupled to the outer side in the vehicle width direction of the side member, and an end portion on the outer side in the vehicle width direction of the bumper reinforcement, and further outward in the vehicle width direction from the inner side surface in the vehicle longitudinal direction of the end portion. An extending portion extending in the vehicle vertical direction, the vertical wall portion being coupled to the spacer on the inner side in the vehicle front-rear direction, and the vehicle from the vehicle upper side and the vehicle lower side of the vertical wall portion, respectively. A flange formed by bending outward in the front-rear direction, and the flange is in contact with the upper surface and the lower surface of the bumper reinforcement, respectively, and the vertical wall portion above and below the vehicle When the length of the extension portion is compared, the overhanging portion located on the outer side in the vehicle width direction from the end portion of the bumper reinforcement in the extending portion is set longer than the portion overlapping the bumper reinforcement. .

  In this vehicle end structure, the flanges of the extending portions are in contact with the upper and lower surfaces of the bumper reinforcement, respectively. Therefore, when a collision load is input from the barrier to the bumper reinforcement at the time of a minute lap collision, the flange becomes a deformation resistance of the bumper reinforcement. Thereby, the deformation | transformation in which the bumper reinforcement is compressed in the vehicle front-back direction and spreads in the vehicle up-down direction, so-called cross-sectional collapse, is suppressed.

  A spacer is coupled to the vehicle width direction outer side of the end portion of the bumper reinforcement in the extension portion, specifically, the vehicle longitudinal direction inner side of the overhanging portion of the vertical wall portion that is not in contact with the bumper reinforcement. In this overhanging portion, the length of the vertical wall portion in the vertical direction of the vehicle is set longer than the length of the vertical wall portion in the vertical direction of the vehicle in the portion overlapping the bumper reinforcement, and the section modulus is increased. Thereby, the bending rigidity of the overhang | projection part is improving.

  According to the vehicle end structure according to the present invention, it is possible to obtain an excellent effect that it is possible to achieve both the suppression of the deformation of the bumper reinforcement at the time of the minute lap collision and the improvement of the bending rigidity of the overhang portion in the extension portion. .

It is a perspective view which shows the vehicle end part structure which concerns on this embodiment. FIG. 2 is an enlarged cross-sectional view taken along arrow 2-2 in FIG. 1, showing an end portion and an extension portion of bumper reinforcement. FIG. 3 is an enlarged cross-sectional view taken along arrow 3-3 in FIG. 1, illustrating a side member, an end portion of a bumper reinforcement, and an extension portion.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the drawing, the arrow FR indicates the front of the vehicle, the arrow UP indicates the upper side of the vehicle, and the arrow OUT indicates the outer side in the vehicle width direction.

  In FIG. 1, a vehicle end structure S according to the present embodiment relates to, for example, a vehicle front structure, and includes a pair of left and right side members 10, a bumper reinforcement 12, a spacer 14, and an extending portion 16. Yes.

  The side member 10 extends in the vehicle longitudinal direction at an end in the vehicle longitudinal direction. Specifically, the side member 10 is a front side member that constitutes a part of the vehicle skeleton, and is provided on both sides in the vehicle width direction of the space 18 such as the power unit chamber in the front part of the vehicle with the vehicle longitudinal direction as the longitudinal direction. It has been. Moreover, the cross-sectional shape of the side member 10 is, for example, a rectangular closed cross-sectional structure. The configuration of the side member 10 is not limited to this, and various structures can be adopted.

  The bumper reinforcement 12 connects the tip portions of the pair of left and right side members 10 in the vehicle width direction. The bumper reinforcement 12 is a high-strength and high-rigidity member that is arranged with the substantially vehicle width direction as a longitudinal direction. As an example, the bumper reinforcement 12 has a structure having two rectangular closed sections in the vehicle vertical direction. The bumper reinforcement 12 is bolted to the tip of the side member 10 together with the extending portion 16. On the front surface of the bumper reinforcement 12, two working holes 12A for fastening bolts are formed in the vehicle vertical direction. An end 12B of the bumper reinforcement 12 in the vehicle width direction terminates at a position overlapping the tip of the side member 10 in the vehicle front-rear direction. That is, the bumper reinforcement 12 does not extend outward from the side member 10 in the vehicle width direction. The configuration of the bumper reinforcement 12 is not limited to this, and various structures can be employed.

  The extension portion 16 is provided at the end 12B of the bumper reinforcement 12 on the outer side in the vehicle width direction, and extends further outward in the vehicle width direction from the inner side surface in the vehicle front-rear direction of the end portion 12B. The vehicle front-rear direction inner side surface of the end portion 12B is, for example, the rear surface 12C (FIG. 2). The extension portion 16 is a metal plate member, for example, and has a vertical wall portion 20 and a flange 22. The vertical wall portion 20 extends in the vehicle vertical direction, and a spacer 14 is coupled to the vehicle front-rear direction inner side (rear surface side). The flange 22 is formed to bend outward in the vehicle front-rear direction from the vehicle upper side and the vehicle lower side of the vertical wall portion 20.

  As shown in FIG. 2, the flange 22 is in contact with the upper surface 12U and the lower surface 12L of the bumper reinforcement 12. As shown in FIG. 1, the extending portion 16 includes a portion 24 that overlaps the rear surface 12 </ b> C of the bumper reinforcement 12, and an overhang portion 26 that is located on the outer side in the vehicle width direction from the end portion 12 </ b> B of the bumper reinforcement 12. have.

  When the length of the vertical wall portion 20 in the vertical direction of the vehicle is compared, the length H2 of the vertical wall portion 20 of the overhanging portion 26 in the vertical direction of the vehicle is equal to the vehicle of the vertical wall portion 20 in the portion 24 overlapping the bumper reinforcement 12. It is set longer than the length H1 in the vertical direction. The lengths H1 and H2 in the vertical direction of the vehicle are the inner dimensions of the upper and lower flanges 22. Since the bumper reinforcement 12 is disposed so as to be sandwiched between the upper and lower flanges 22, the length H <b> 1 also corresponds to the vehicle vertical direction dimension (height dimension) of the bumper reinforcement 12. A boundary portion 28 between the portion 24 overlapping the bumper reinforcement 12 and the overhang portion 26 is inclined with respect to the vehicle width direction. Thereby, the length of the vehicle vertical direction from the part 24 which overlaps the bumper reinforcement 12 to the overhang | projection part 26 is increasing gradually. The boundary portion 28 is located in the vicinity of the outer end 12B of the bumper reinforcement 12 on the outer side in the vehicle width direction.

  A block-shaped projecting portion 34 is disposed on the vehicle front-rear direction outer surface (front surface) of the vertical wall portion 20 in the overhang portion 26. The projecting portion 34 is configured by a hat-shaped main body portion 36 in plan view and a plurality of reinforcing members 38 disposed inside the main body portion 36, and the bumper reinforcement 12 has an outer end in the vehicle width direction. It is arranged at a position further away from the portion 12B to the outside in the vehicle width direction.

  The main body portion 36 includes an inner wall portion 36A and an outer wall portion 36B that are arranged to face each other in the vehicle width direction, a front wall portion 36C that connects the front end portion of the inner wall portion 36A and the front end portion of the outer wall portion 36B in the vehicle width direction, It is constituted by. The inner wall portion 36A and the outer wall portion 36B extend substantially along the vehicle front-rear direction.

  The rear end portion of the inner wall portion 36A is an inner flange 36A1 bent inward in the vehicle width direction. The inner flange 36A1 is joined (fixed) to the front surface of the vertical wall portion 20 by, for example, arc welding. On the other hand, the rear end portion of the outer wall portion 36B is an outer flange 36B1 bent outward in the vehicle width direction. The outer flange 36B1 is joined (fixed) to the front surface of the vertical wall portion 20 by, for example, arc welding. The front wall portion 36C extends along the vehicle width direction and the vehicle vertical direction. The front surface of the front wall portion 36C is a flat surface.

  A plurality of reinforcing members 38 are arranged in a plurality of stages in the vehicle vertical direction inside the protrusion 34. Each reinforcing member 38 is configured as a substantially trapezoidal plate material in plan view, and the outer peripheral portion thereof is joined to the inner side surfaces of the inner wall portion 36A, the outer wall portion 36B, and the front wall portion 36C by arc welding or the like. Thus, the inner wall portion 36A, the outer wall portion 36B, and the front wall portion 36C are connected to each other by the reinforcing member 38.

  The spacer 14 is coupled to the outer side of the side member 10 in the vehicle width direction, and is configured, for example, in a rectangular tube shape. By this spacer 14, the overhanging portion 26 of the extending portion 16 and the side wall portion of the side member 10 on the outer side in the vehicle width direction are connected in the vehicle front-rear direction.

  Structurally, the spacer 14 includes a plurality of inner wall portions 52 and outer wall portions 54 that are arranged to face each other in the vehicle width direction, and a plurality of spacers that connect the inner wall portion 52 and the outer wall portion 54 in the vehicle width direction. A partition plate 56 and a rear end wall 58 that is disposed at an end of the partition plate 56 on the vehicle rear side and connects the rear end portion of the inner wall portion 52 and the rear end portion of the outer wall portion 54 in the vehicle width direction. , Is composed of. In FIG. 1, only the partition plate 56 on the uppermost side of the vehicle is shown, and a partition plate is also arranged below the vehicle. The rear side of the inner wall portion 52 and the rear end wall 58 are constituted by one member.

  The inner wall portion 52 has a front portion inclined toward the outer side in the vehicle width direction such that the front portion is located on the outer side in the vehicle width direction with respect to the side surface on the outer side in the vehicle width direction of the side member 10. The outer wall portion 54 is disposed on the outer side in the vehicle width direction with respect to the inner wall portion 52 and the entire front side portion is positioned on the outer side in the vehicle width direction with respect to the side surface on the outer side in the vehicle width direction of the side member 10. Inclined outward in the vehicle width direction.

  More specifically, the partition plate 56 is formed in a pentagonal shape elongated in the vehicle front-rear direction in plan view. The inner wall portion 52 is disposed along two sides on the inner side in the vehicle width direction of the partition plate 56. Moreover, the outer side wall part 54 is arrange | positioned so that the two sides and the inclined side which opposes a vehicle width direction may be followed.

  A front end portion of the outer wall portion 54 is bent outward in the vehicle width direction to form an outer flange 54A, and the outer flange 54A is joined (fixed) to the rear surface of the overhang portion 26 in the extension portion 16 by arc welding. . The outer side wall 54 is joined (fixed) by arc welding to the outer side surface of the plurality of partition plates 56 in the vehicle width direction.

  Next, the relationship between the constituent wall of the protrusion 34 and the constituent wall of the spacer 14 will be described. An inner flange 36A1 of the inner wall portion 36A of the projecting portion 34 is disposed on the vehicle front side of the inner wall portion 52 of the spacer 14 with the projecting portion 26 of the extending portion 16 interposed therebetween. Further, an outer flange 36B1 of the outer wall portion 36B of the protruding portion 34 is disposed on the vehicle front side of the outer wall portion 54 with the overhang portion 26 of the extension portion 16 interposed therebetween. That is, the inner wall portion 36A of the projecting portion 34 is disposed substantially along the extending direction of the inner wall portion 52 of the spacer 14, and the outer wall portion 36B of the projecting portion 34 is disposed substantially along the extending direction of the outer wall portion 54 of the spacer 14. Yes.

  Further, the reinforcing member 38 in the protrusion 34 and the partition plate 56 in the spacer 14 are arranged at the same height in the vehicle vertical direction. That is, the reinforcing member 38 and the partition plate 56 are disposed on the same plane.

  On the outer side in the vehicle width direction of the spacer 14 described above, a spacer extension portion 70 having a substantially isosceles triangular shape in a plan view is disposed. The spacer extension 70 includes an extension wall 72, a plurality of support walls 74, and a reinforcing wall 76. The extension wall 72 is a portion obtained by extending the rear end wall 58 of the spacer 14 outward in the vehicle width direction, and is configured by the same member.

  On the outer side in the vehicle width direction of the outer wall portion 54 (inclined wall) of the spacer 14, a plurality of support walls 74 are arranged orthogonally. The plurality of support walls 74 are arranged in parallel to the upper surface of the side member 10. The hypotenuse on the inner side in the vehicle width direction of each support wall 74 is joined to the side surface on the outer side in the vehicle width direction of the outer wall portion 54 of the spacer 14 by arc welding. Further, the bottom side of each support wall 74 is joined to the surface of the extension wall 72 on the vehicle front-rear direction outer side (vehicle front side). Accordingly, the extension wall 72 and the outer wall portion 54 of the spacer 14 are connected by the support wall 74 in the vehicle front-rear direction. At the same time, the extension wall 72 is supported by the outer wall portion 54 that is an inclined wall by the support wall 74.

  In the present embodiment, the reinforcing member 38 of the protrusion 34, the partition plate 56 of the spacer 14, and the support wall 74 of the spacer extension 70 are set to the same number (three), and the reinforcing member 38 and the partition The plate 56 and the support wall 74 are disposed at the same height in the vehicle vertical direction. That is, the reinforcing member 38, the partition plate 56, and the support wall 74 are arranged on the same plane. However, since this is an example, the number of support walls 74 may be one, or two or four or more.

  Further, the support wall 74 is formed in an isosceles triangle shape in plan view so that the length along the vehicle width direction becomes shorter toward the vehicle front side. However, the present invention is not limited to this. , It may be formed in a right triangle shape, or in another shape.

  The reinforcing wall 76 is disposed on the extended wall 72 side on the oblique side portion of the plurality of support walls 74 on the outer side in the vehicle width direction. The reinforcing wall 76 is arc welded to the oblique side portion on the outer side in the vehicle width direction of the plurality of support walls 74 to connect the plurality of support walls 74 in the vehicle vertical direction.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 1 and 2, in the vehicle end structure S according to the present embodiment, the flange 22 of the extending portion 16 is in contact with the upper surface 12U and the lower surface 12L of the bumper reinforcement 12 respectively. Therefore, when a collision load F is input from the barrier (not shown) to the bumper reinforcement 12 at the time of the minute lap collision, the flange 22 becomes the deformation resistance of the bumper reinforcement 12. Thereby, the deformation | transformation in which the bumper reinforcement 12 is compressed in the vehicle front-back direction and spreads in the vehicle up-down direction, so-called cross-sectional collapse, is suppressed. In addition, the two-dot chain line of FIG. 2 has shown typically the shape of the bumper reinforcement 12 after a deformation | transformation.

  As shown in FIGS. 1 and 3, the vehicle of the extended portion 16 in the vehicle width direction of the bumper reinforcement 12, specifically, the protruding portion 26 of the vertical wall portion 20 that is not in contact with the bumper reinforcement 12. A spacer 14 is coupled to the inner side in the front-rear direction. In the initial stage of the micro lap collision, a barrier (not shown) quickly comes into contact with the front wall portion 36C of the protruding portion 34. Accordingly, the collision load F is also input to the protruding portion 34 from the time of the initial collision and is transmitted to the side member 10 through the spacer 14.

  As shown in FIG. 1, when the length of the vertical wall portion 20 of the extending portion 16 in the vertical direction of the vehicle is compared, the length H2 of the overhanging portion 26 in the vertical direction of the vehicle is a portion overlapping the bumper reinforcement 12. 24 is set to be longer than the length H1 in the vehicle vertical direction. Thereby, the space | interval of the vehicle up-down direction of the flange 22 spreads, and the yield strength (section modulus) of the overhang | projection part 26 is improving rather than the part 24 which overlaps the bumper reinforcement 12. FIG. As a result, the bending rigidity of the overhang portion 26 is improved.

  Thus, according to the vehicle end structure S according to the present embodiment, it is possible to achieve both the suppression of the deformation of the bumper reinforcement 12 at the time of the minute lap collision and the improvement of the bending rigidity of the overhanging portion 26 in the extending portion 16. it can.

  As a result, the reaction force at the beginning of the collision at the time of the minute lap collision is increased, the input of the collision load F to the side member 10 is increased, and the shock absorbing performance is improved. Along with this, the input of the collision load to the spacer 14 is reduced, so that the moment input to the side member 10 via the spacer 14 is suppressed. Therefore, since the start of the bending deformation of the side member 10 due to the moment is delayed, the collision performance with respect to the minute lap collision is improved.

[Other Embodiments]

  As mentioned above, although an example of embodiment of this invention was demonstrated, embodiment of this invention is not limited above, In addition to the above, in a range which does not deviate from the main point, it can implement variously. Of course there is. For example, the vehicle end structure S is not limited to the front portion of the vehicle, and can be applied to the rear portion of the vehicle.

DESCRIPTION OF SYMBOLS 10 Side member 12 Bumper reinforcement 12B End 12L on the vehicle width direction outer side Lower surface 12U Upper surface 14 Spacer 16 Extension part 20 Vertical wall part 22 Flange 24 Portion overlapping bumper reinforcement 26 Overhang part S Vehicle end part structure

Claims (1)

A pair of left and right side members extending in the vehicle longitudinal direction at an end in the vehicle longitudinal direction;
Bumper reinforcement that connects the tip portions of the pair of left and right side members in the vehicle width direction;
A spacer coupled to the outside in the vehicle width direction of the side member;
Provided at an end of the bumper reinforcement on the outer side in the vehicle width direction, and further extending from the inner side surface in the vehicle front-rear direction of the end to the outer side in the vehicle width direction,
The extending portion is formed by bending in the vehicle longitudinal direction from the vehicle upper side and the vehicle lower side of the vertical wall portion, the vertical wall portion extending in the vehicle vertical direction to which the spacer is coupled to the vehicle longitudinal direction inside. And a flange
The flange is in contact with the upper surface and the lower surface of the bumper reinforcement,
When comparing the length of the vertical wall portion in the vehicle vertical direction, the overhanging portion located on the outer side in the vehicle width direction from the end portion of the bumper reinforcement overlaps the bumper reinforcement in the extension portion. Vehicle end structure set longer than the part.

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