JP2007069736A - Bumper supporting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To longitudinally buckle a side member in vehicle collision even when the height of the side member differs from that of a bumper. <P>SOLUTION: An antirotation joint 26 serving as an antirotation means is disposed across a bumper arm 20 between a vehicle rear side end part 10B of a rear side member 10, and a base 14F of a bumper reinforcement 14. The antirotation joint 26 prevents the base 14F of the bumper reinforcement 14 from falling down toward the vehicle rear side end part 10B of the rear side member 10. On an upper part of the vehicle rear side end part 10B of the rear side member 10, a crash bead 12 serving as a deformation promoting means for facilitating buckling in a longitudinal direction of the vehicle rear side end part 10B of the rear side member 10 is formed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bumper support structure in which a bumper is supported by a side member arranged in the longitudinal direction of the vehicle in a vehicle structure such as an automobile.

Patent Document 1 below discloses a structure in which bumpers are fixed to end portions of left and right front side members (frames) or rear side members (frames). In this structure, the impact at the time of collision is absorbed by buckling the front side member or rear side member supporting the bumper in the longitudinal direction at the time of a vehicle collision.
Japanese Patent Laid-Open No. 08-310440

  However, in the bumper support structure as disclosed in Patent Document 1, when there is a difference between the height of the front side member or the rear side member and the height of the bumper in the vehicle, the bumper mounting side end of the front side member or the rear side member is It is necessary to bend or curve in the direction. As a result, when a load is applied from the bumper to the front side member or the rear side member at the time of a vehicle collision, a rotational moment is generated at the bent portion or the curved portion. For this reason, it becomes difficult to buckle the front side member or the rear side member in the longitudinal direction.

  In view of the above facts, the present invention has an object to provide a bumper support structure capable of buckling a side member in a longitudinal direction at the time of a vehicle collision even when the height of the side member is different from the height of the bumper. .

  The bumper support structure according to the first aspect of the present invention is disposed at a position where the longitudinal direction of the bumper support structure is shifted along the vehicle front-rear direction and the height of the base portion is shifted upward or downward with respect to the side member. The base part is provided with a widened part that extends the vehicle vertical width on the extension line of the side member, and between the side member and the base part of the bumper reinforcement, A rotation preventing means for preventing the bumper from falling in the direction of the side member, and a longitudinal seat of the side member provided on a side opposite to the side supporting the rotation preventing means at a longitudinal end portion of the side member. A deformation promoting means for facilitating bending.

  When a collision load is applied to the base part of the bumper reinforcement, the side member direction of the base part of the bumper reinforcement is prevented by a rotation preventing means provided between the side member and the base part of the bumper reinforcement. Falling down is prevented. Further, by providing the deformation promoting means on the side opposite to the side supporting the rotation preventing means at the end in the longitudinal direction of the side member opposite to the side supporting the rotation preventing means, the longitudinal end of the side member becomes Easily buckles in the longitudinal direction without bending.

  According to a second aspect of the present invention, in the bumper support structure according to the first aspect, the anti-rotation means has a uniform cross-sectional shape made of an extruded material.

  Since the anti-rotation means can be formed of an extruded material with a uniform cross-sectional shape, it can be easily manufactured even when the anti-rotation means has a complicated cross-sectional structure.

  According to a third aspect of the present invention, in the bumper support structure according to the first or second aspect, the side member is a rear side member at the rear of the vehicle, and the bumper reinforcement is a bumper reinforcement of a rear bumper. It is characterized by being.

  When a collision load acts on the rear bumper, the rear side end portion of the rear side member easily buckles in the longitudinal direction.

  According to a fourth aspect of the present invention, in the bumper support structure according to any one of the first to third aspects, the rotation preventing means is an attachment disposed between the side member and the bumper reinforcement. And the mounting portion is fixed to the side member.

  The attachment portion of the rotation preventing means is disposed between the side member and the bumper reinforcement, and the attachment portion is fixed to the side member. For this reason, when the side member is buckled in the longitudinal direction, the buckling in the longitudinal direction is not obstructed by the fixing portion between the rotation preventing means and the side member, and the crushing margin of the side member can be ensured.

  According to a fifth aspect of the present invention, in the bumper support structure according to any one of the first to fourth aspects, the rotation preventing means is an inclination for connecting the side member and a base portion of the bumper reinforcement. It has the part.

  By the inclined portion of the rotation preventing means that connects the side member and the base portion of the bumper reinforcement, the bumper reinforcement is reliably prevented from falling in the direction of the side member. As a result, the side member is reliably buckled in the longitudinal direction.

  According to a sixth aspect of the present invention, in the bumper support structure according to the fifth aspect of the present invention, the bumper support structure further includes a reinforcing portion that connects a longitudinal end of the side member and an intermediate portion in the vehicle longitudinal direction of the inclined portion.

  The reinforcing portion that connects the longitudinal end of the side member and the middle portion of the inclined portion in the vehicle longitudinal direction prevents the inclined portion from being deformed. As a result, the inclined portion effectively prevents the bumper from falling in the direction of the side member. For this reason, the side member is surely buckled in the longitudinal direction.

  A seventh aspect of the present invention is the bumper support structure according to any one of the first to sixth aspects, wherein a side cross-sectional shape of the rotation preventing means is a triangle.

  Since the side cross-sectional shape of the rotation preventing means is a triangle, it is difficult for the rotation preventing means to collapse. As a result, the bumper is reliably prevented from falling in the direction of the side member, so that the vehicle front side end portion or the vehicle rear side end portion of the side member is reliably buckled in the longitudinal direction.

  The invention according to claim 8 is the bumper support structure according to any one of claims 4 to 7, wherein the protrusion is formed on the attachment portion of the rotation preventing means so as to protrude toward the side member. The side member is sandwiched between the projecting portion and the rotation preventing means.

  The side member is sandwiched between the protrusion formed on the attachment portion of the rotation preventing means and projecting toward the side member, and the rotation preventing means. As a result, the side member and the rotation preventing means can be prevented from shifting in the vehicle up-down direction, so that the assembling work is facilitated.

  According to the first aspect of the present invention, even when the height of the side member and the height of the bumper are different, the side member can be buckled in the longitudinal direction at the time of a vehicle collision.

  The present invention according to claim 2 facilitates the manufacture of the rotation preventing means.

  According to the third aspect of the present invention, even when the height of the rear side member and the height of the rear bumper are different, the rear side member can be buckled in the longitudinal direction at the time of a vehicle collision.

  The present invention according to claim 4 can secure a crushing margin of the side member.

  The present invention according to claim 5 can reliably buckle the side member in the longitudinal direction.

  The present invention according to claim 6 can reliably buckle the side member in the longitudinal direction.

  According to the seventh aspect of the present invention, the side member can be reliably buckled in the longitudinal direction.

  The present invention according to claim 8 can improve the assembly workability.

  One embodiment of a bumper support structure in the present invention will be described with reference to FIGS.

  In the figure, the arrow UP indicates the vehicle upward direction, the arrow FR in the figure indicates the vehicle forward direction, and the arrow IN in the figure indicates the vehicle width inside direction.

  As shown in FIG. 3, in this embodiment, rear side members 10 as linear side members extending in the vehicle front-rear direction are disposed near both ends in the vehicle width direction at the lower part of the rear portion of the vehicle. FIG. 3 shows the rear side member 10 on the right side of the vehicle.

  As shown in FIG. 4, the rear side member 10 is arranged with its longitudinal direction along the vehicle front-rear direction, and is made of an aluminum alloy extruded material. Further, the cross-sectional shape of the rear side member 10 viewed from the front-rear direction of the vehicle is a rectangular shape, and a vertical wall portion 10A is formed in the vehicle vertical direction inside the cross-section inside the rear side member 10 in the vehicle vertical direction. .

  The upper part of the rear side member 10B of the rear side member 10 has a crash as a deformation promoting means for facilitating the longitudinal collapse of the rear side member 10B of the rear side member 10 in the longitudinal direction of the vehicle. A bead 12 is formed.

  More specifically, an upper outer ridge line 10E serving as a boundary between the upper wall portion 10C and the vehicle width direction outer wall portion 10D of the rear side member 10B of the rear side member 10, and the upper wall portion 10C and the vehicle width direction inner wall portion 10F. A plurality of crush beads 12 are formed at predetermined intervals along the vehicle front-rear direction on the upper inner ridge line 10G as a boundary with the vehicle. Each crush bead 12 is formed at the same position in the vehicle front-rear direction on the upper outer ridge line 10E and the upper inner ridge line 10G, and each crush bead 12 is recessed toward the inner side of the cross section of the rear side member 10.

  As shown in FIG. 2, a rear bumper bumper reinforcement 14 is disposed on the rear side member 10 on the vehicle rear side. Further, the bumper reinforcement 14 is arranged with its longitudinal direction along the vehicle width direction, and an intermediate portion in the vehicle width direction is curved in an arc shape in a convex shape toward the rear of the vehicle. FIG. 2 shows the vehicle right end portion 14 </ b> A of the bumper reinforcement 14.

  As shown in FIG. 1, the bumper reinforcement 14 is made of an aluminum alloy extruded material, and the sectional shape of the bumper reinforcement 14 viewed from the vehicle width direction is substantially rectangular. The ground height H1 of the base portion 14F of the bumper reinforcement 14 is lower than the ground height H2 of the axis L1 of the rear side member 10.

  The base portion 14F of the bumper reinforcement 14 is a portion that is an extension of the vertical center line L2 of the collision body K such as a bumper of another vehicle, and is a portion that receives a collision load of the collision body K.

  The upper portion of the bumper reinforcement 14 is a widened portion 14B in which the vehicle vertical width of the bumper reinforcement 14 is widened upward, and the widened portion 14B is disposed on an extension line of the rear side member 10 with respect to the axis L1 toward the vehicle rear side. Has been. That is, the bumper reinforcement 14 has a vehicle vertical width widened upward, and has a widened portion 14B at the top, and the widened portion 14B is disposed on an extension line of the rear side end portion 10B of the rear side member 10.

  The rear end upper portion of the widened portion 14B of the bumper reinforcement 14 is an inclined surface 14G that extends from the upper front side of the vehicle to the lower rear side of the vehicle, and the lower end of the bumper reinforcement 14 extends vertically downward from the vehicle. A wall portion 14C is formed. Further, a lateral wall portion 14 </ b> D is formed in the front-rear direction of the vehicle at the central portion in the vertical direction inside the cross section of the bumper reinforcement 14.

  As shown in FIG. 2, bumper arms 20 are respectively disposed between the left and right rear side members 10 and the bumper reinforcement 14. In FIG. 2, the bumper arm 20 on the right side of the vehicle is shown.

  The bumper arm 20 is made of an extruded material of aluminum alloy. Further, the cross-sectional shape of the bumper arm 20 viewed from the vehicle vertical direction is a substantially rectangular shape, and a vertical wall portion 20 </ b> A is formed in the vehicle front-rear direction at the center in the vehicle width direction inside the cross-section of the bumper arm 20. The rear wall portion 20B of the bumper arm 20 is curved in an arc shape along the front wall portion 14E of the bumper reinforcement 14 and extends outwardly in the vehicle width direction at both ends in the vehicle width direction of the rear wall portion 20B. A portion 20C and an inner extension portion 20D extending inward in the vehicle width direction are formed.

  As shown in FIG. 4, attachment holes 22 are formed in the outer extension portion 20 </ b> C and the inner extension portion 20 </ b> D of the rear wall portion 20 </ b> B of the bumper arm 20 with predetermined intervals in the vehicle vertical direction. In addition, weld nuts 24 are fixed to the front wall portion 14E of the bumper reinforcement 14 facing the mounting holes 22, respectively. The bumper arm 20 is fixed to the bumper reinforcement 14 by fastening bolts 25 inserted into the mounting holes 22 from the front side of the vehicle to the weld nut 24.

  As shown in FIG. 1, an anti-rotation joint 26 as an anti-rotation means is disposed between the rear side member 10 and the base portion 14F of the bumper reinforcement 14 with the bumper arm 20 interposed therebetween. The reinforcement 14 is prevented from falling in the direction of the vehicle rear side end portion 10B of the rear side member 10.

  That is, the anti-rotation joint 26 as the anti-rotation means supports the rotational movement of the bumper reinforcement 14 between the bumper reinforcement 14 and the vehicle rear side end portion 10B of the rear side member 10.

  The anti-rotation joint 26 has a uniform cross-sectional shape made of an aluminum alloy extruded material, and the anti-rotation joint 26 has a hollow triangular shape as viewed from the vehicle width direction. The upper wall portion 26A of the rotation prevention joint 26 is disposed in parallel with the lower wall portion 10H of the rear side end portion 10B of the rear side member 10, and the rear wall portion 26B of the rotation prevention joint 26 is the front wall portion of the bumper arm 20. It is arranged in parallel with 20E. Further, a flange 26C is formed at the lower end of the rear wall portion 26B of the rotation prevention joint 26 toward the rear of the vehicle, and the flange 26C is disposed in parallel with the front end portion of the lower end 20F of the bumper arm 20.

  An inclined wall portion 26D as an inclined portion that linearly connects the front end of the upper wall portion 26A and the lower end of the rear wall portion 26B in the rotation prevention joint 26 is an inclined portion that connects the rear side member 10 and the bumper arm 20. . Further, a rib 26I as a reinforcing portion is formed at a portion connecting the coupling portion 26E between the upper wall portion 26A and the rear wall portion 26B of the rotation prevention joint 26 and the intermediate portion 26F in the front-rear direction of the inclined wall portion 26D. .

  Therefore, as shown in FIG. 6, when the collision body K collides with the base portion 14 of the bumper reinforcement 14 on the vehicle lower side with respect to the axis L <b> 1 of the rear side member 10, A load (arrow F1 in FIG. 6) acts from the vehicle rear side toward the vehicle front side. At this time, the bumper reinforcement 14 and the bumper arm 20 are crushed in the longitudinal direction of the vehicle body, but due to the difference in height S1 between the axis L1 of the rear side member 10 and the portion P1 of the bumper reinforcement 14, the base 14F of the bumper reinforcement 14 has A rotation moment M1 in the direction of the rear side end 10B of the rear side member 10 (in the direction of arrow M1 in FIG. 6) is generated around the rear lower end P2 of the rear side member 10 or its vicinity. The inclined wall portion 26D of the anti-rotation joint 26 acts as a beam against this rotational moment M1, and the base portion 14F of the bumper reinforcement 14 is prevented from falling in the direction of the rear side member 10.

  Note that the crush bead 12 is not formed on the lower side of the vehicle rear side end portion 10B of the rear side member 10 in order that the inclined wall portion 26D acts as a beam reliably.

  Further, the inclined wall portion 26D can be reinforced by the ribs 26I. Furthermore, the side cross-sectional shape of the anti-rotation joint 26 is a triangle, and further, a side cross-sectional shape in which triangles are overlapped by the inclined wall portion 26D and the rib 26I. As a result, the anti-rotation joint 26 is less likely to collapse, and the bumper reinforcement 14 is reliably prevented from falling in the direction of the rear side end 10B of the rear side member 10.

  As shown in FIG. 1, a mounting wall portion 26 </ b> G as a mounting portion disposed between the vehicle rear side end portion 10 </ b> B of the rear side member 10 and the bumper arm 20 is formed on the rear end upper portion of the rotation prevention joint 26. Yes. The lower portion 26H, which is a portion from the lower end portion of the mounting wall portion 26G to the vicinity of the upper portion of the axis L1 of the rear side member 10, has a rectangular cross section viewed from the vehicle width direction and whose longitudinal direction is the vehicle vertical direction. The front wall portion 26J of the lower portion 26H is welded (welded portion Y1) to each rear end 10J of the vehicle width direction outer wall portion 10D and the vehicle width direction inner wall portion 10F of the rear side member 10. Further, the rear portion 26K of the upper wall portion 26A of the rotation prevention joint 26 is welded (welded portion Y2) to a portion 10K on the lower wall portion 10H of the rear side member 10 that is located behind the crash beads 12 in the vehicle.

  Accordingly, as shown in FIG. 6, when the vehicle rear side end portion 10 </ b> B of the rear side member 10 is buckled and deformed in the longitudinal direction starting from each crash bead 12, the upper wall portion of the rear side member 10 and the rotation prevention joint 26 is used. The welded portion Y2 with 26A does not interfere with buckling deformation.

  The upper portion 26L of the mounting wall portion 26G of the rotation prevention joint 26 has a single plate structure, and a gap 27 is formed between the upper portion 26L of the mounting wall portion 26G and the rear end of the rear side member 10. In addition, a flange 26M is formed as a protruding portion at the upper end of the upper portion 26L of the mounting wall portion 26G so as to protrude toward the vehicle front side, which is the rear side member 10 side. The front end portion of the flange 26M is welded (welded portion Y3) to the upper wall portion 10C of the rear side end portion 10B of the rear side member 10, and the rear side member is formed by the flange 26M and the upper wall portion 26A of the rotation prevention joint 26. Ten vehicle rear side end portions 10B are sandwiched.

  Accordingly, the vehicle rear side end portion 10B of the rear side member 10 is sandwiched between the flange 26M of the rotation prevention joint 26 and the upper wall portion 26A of the rotation prevention joint 26. The pinching means that a slight gap is formed between the rear side member 10 and the upper wall portion 26A of the rotation prevention joint 26 when the flange 26M of the rotation prevention joint 26 and the rear side member 10 are brought into contact with each other. Includes configuration.

  As a result, the vehicle rear side end portion 10B of the rear side member 10 and the rotation prevention joint 26 can be prevented from shifting in the vehicle vertical direction.

  As shown in FIG. 4, a plurality of work holes 40 are formed at both ends in the vehicle width direction of the bumper reinforcement 14 toward the vehicle front-rear direction, and the bumper arm 20 that is coaxial with these work holes 40. A work hole 42 is also formed in the rear wall portion 20B. A mounting hole 44 is formed in the front wall portion 20 </ b> E of the bumper arm 20 that is coaxial with the work holes 40 and 42. On the other hand, a weld nut 48 is fixed to each part of the rear wall portion 26B and the mounting wall portion 26G facing the mounting hole 44, respectively.

  Therefore, the bumper reinforcement 14 and the bumper arm 20 are connected to the bumper arm 20 via the anti-rotation joint 26 by fastening the bolts 50 inserted into the mounting holes 44 through the work holes 40 and 42 from the rear side of the vehicle. It is fixed to the rear side member 10.

  As shown in FIG. 2, a flange 26N is formed at the vehicle width direction outer end portion of the mounting wall portion 26G of the rotation prevention joint 26 toward the front of the vehicle, and the flange 26N is formed in the vehicle width direction of the rear side member 10. It opposes the site | part behind each crush bead 12 in outer wall part 10D.

  Next, the operation of this embodiment will be described.

  In the present embodiment, as shown in FIG. 6, when the collision body K collides with the base portion 14 </ b> F of the bumper reinforcement 14 on the vehicle lower side with respect to the axis L <b> 1 of the rear side member 10, A load (arrow F1 in FIG. 6) acts from the vehicle rear side to the vehicle front side on the portion P1 of the bumper reinforcement 14 on the extension line of the direction center line L2.

  At this time, the bumper reinforcement 14 and the bumper arm 20 are crushed in the longitudinal direction of the vehicle body, but due to the height difference S1 between the axis L1 of the rear side member 10 and the part P1 of the bumper reinforcement 14, the part P1 of the bumper reinforcement 14 has Rotational moment M1 is generated in the direction of the rear side end 10B of the rear side member 10 (in the direction of the arrow M1) around the rear lower end P2 of the rear side member 10 or in the vicinity thereof.

  In this embodiment, the inclined wall portion 26D of the rotation prevention joint 26 acts as a beam against the rotation moment M1. As a result, the base portion 14F of the bumper reinforcement 14 can be prevented from falling in the direction of the vehicle rear side end portion 10B of the rear side member 10. Therefore, it is possible to prevent the vehicle rear side end portion 10B from being bent and deformed upward of the vehicle, which is caused by the base portion 14F of the bumper reinforcement 14 falling in the direction of the vehicle rear side end portion 10B of the rear side member 10.

  Therefore, the vehicle rear side end portion 10B of the rear side member 10 is rearward of the rear side member 10 by the load (arrow F1 in FIG. 6) acting on the base portion 14F of the bumper reinforcement 14 from the vehicle rear side toward the vehicle front side. It buckles and deforms in the longitudinal direction starting from each crush bead 12 formed on the upper portion of the side end portion 10B. For this reason, the impact absorption performance at the time of collision of the vehicle rear side end portion 10B of the rear side member 10 can be improved.

  Furthermore, it is not necessary to bend or curve the vehicle rear side end portion 10B of the rear side member 10 upward in the vehicle, and the rear side member 10 can be formed into a linear shape. As a result, it is possible to reduce the number of manufacturing processes such as bending the extruded material constituting the rear side member 10, and to facilitate shock absorption control by buckling (axial compression deformation) in the longitudinal direction of the rear side member 10 at the time of a vehicle collision.

  In this embodiment, the anti-rotation joint 26 has a uniform cross-sectional shape made of an aluminum alloy extruded material. As a result, even when the anti-rotation joint 26 has a complicated cross-sectional structure, the anti-rotation joint 26 can be easily manufactured.

  Further, in the present embodiment, the inclined wall portion 26D can be reinforced by the rib 26I of the rotation prevention joint 26, so that the base portion 14F of the bumper reinforcement 14 falls in the direction of the vehicle rear side end portion 10B of the rear side member 10. Can be reliably prevented. Furthermore, the side cross-sectional shape of the anti-rotation joint 26 is a triangle, and further, a side cross-sectional shape in which triangles are overlapped by the inclined wall portion 26D and the rib 26I. As a result, the anti-rotation joint 26 is unlikely to collapse, and the base portion 14F of the bumper reinforcement 14 in the direction toward the vehicle rear side end portion 10B of the rear side member 10 is further reliably prevented.

  Further, in the present embodiment, the rear portion 26K of the upper wall portion 26A of the rotation prevention joint 26 is welded (welded portion Y2) to a portion 10K on the lower wall portion 10H of the rear side member 10 that is behind the crash beads 12 in the vehicle. ing. As a result, as shown in FIG. 6, when the vehicle rear side end portion 10 </ b> B of the rear side member 10 is buckled and deformed in the longitudinal direction starting from each crash bead 12, the upper wall of the rear side member 10 and the rotation prevention joint 26. The welded portion Y2 with the portion 26A does not interfere with the buckling deformation. For this reason, the vehicle rear side end portion 10B of the rear side member 10 can be effectively buckled and deformed, and the shock absorption performance at the time of collision can be improved reliably.

  In the present embodiment, the vehicle rear side end portion 10B of the rear side member 10 is sandwiched between the flange 26M of the rotation prevention joint 26 and the upper wall portion 26A. As a result, the vehicle rear side end portion 10B of the rear side member 10 and the rotation prevention joint 26 can be prevented from shifting in the vehicle vertical direction, so that the assembling work is facilitated and the assembling workability is improved.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, in the above embodiment, the cross-sectional shape of the anti-rotation joint 26 as the anti-rotation means viewed from the vehicle width direction is a hollow triangle, but instead, the anti-rotation joint 26 is viewed from the vehicle width direction. The cross-sectional shape may be another shape such as a solid triangular shape. Further, the cross-sectional shape of the rotation prevention joint 26 viewed from the vehicle width direction is an L-shape composed of an upper wall portion 26A and a rear wall portion 26B, and the rear wall portion 26B has a strength that does not easily fall down toward the upper wall portion 26A. It is also good.

  In the above-described embodiment, the bumper support structure of the present invention has been described with respect to a configuration in which the ground height H1 of the base portion 14F of the bumper reinforcement 14 is lower than the ground height H2 of the axis L1 of the rear side member 10. The bumper support structure can also be applied to a configuration in which the ground height H1 of the base portion 14F of the bumper reinforcement 14 is higher than the ground height H2 of the axis L1 of the rear side member 10.

  In the above embodiment, the crash bead 12 as the deformation promoting means is formed on the upper outer ridge line 10E and the upper inner ridge line 10G at the vehicle rear side end portion 10B of the rear side member 10. The upper part may be continuously formed in the vehicle width direction. Further, the deformation promoting means is not limited to the crash bead 12, but may be other deformation promoting means such as a thin plate structure.

  In the above embodiment, the bumper support structure of the present invention has been described with respect to the rear side member 10 that supports the bumper reinforcement 14 of the rear bumper. However, the bumper support structure of the present invention has the bumper reinforcement of the front bumper on the front side member. It is applicable also to the structure which supports.

  In the above embodiment, the rear side member 10, the bumper reinforcement 14, the bumper arm 20, and the anti-rotation joint 26 are made of an extruded material of aluminum alloy, but are made of an extruded material of another light alloy instead of the aluminum alloy. You may do it. Further, the rear side member 10, the bumper reinforcement 14, the bumper arm 20, and the rotation prevention joint 26 may be formed of a press-formed product made of other metal such as iron.

FIG. 3 is an enlarged sectional view taken along line 1-1 of FIG. It is a top view which shows the bumper support structure for vehicles which concerns on one Embodiment of this invention. It is the perspective view seen from the vehicles slanting back inner side which shows the bumper support structure for vehicles concerning one embodiment of the present invention. It is the disassembled perspective view which looked at the bumper support structure for vehicles which concerns on one Embodiment of this invention from the vehicle diagonally backward inner side. It is the perspective view seen from the vehicle slant front inner side which shows the bumper support structure for vehicles which concerns on one Embodiment of this invention. It is sectional drawing corresponding to FIG. 1 which shows the deformation | transformation state of the bumper support structure for vehicles which concerns on one Embodiment of this invention.

Explanation of symbols

10 Rear side member (side member)
10B Rear end member of rear side member 10C Upper wall portion of rear side member 10E Upper outer ridge line of rear side member 10G Upper inner ridge line of rear side member 12 Crash bead (deformation promoting means)
14 Bumper reinforcement 14B Wide part of bumper reinforcement 20 Bumper arm 26 Anti-rotation joint (rotation prevention means)
26D Inclined wall part of the anti-rotation joint (inclined part)
26G Anti-rotation joint mounting wall (mounting section)
26I Anti-rotation joint rib (reinforcement)
26M Anti-rotation joint flange (protrusion)

Claims (8)

A side member arranged in the longitudinal direction of the vehicle along the longitudinal direction of the vehicle;
A bumper reinforcement in which the height of the base portion is disposed at a position shifted upward or downward with respect to the side member, and a widened portion in which the vehicle vertical width of the base portion is widened is disposed on an extension line of the side member; ,
Anti-rotation means provided between the side member and the base of the bumper reinforcement, the bumper preventing the bumper from falling in the direction of the side member,
A deformation promoting means that is provided on a side opposite to the side that supports the rotation preventing means at a longitudinal end portion of the side member, and that facilitates buckling in the longitudinal direction of the side member;
A bumper support structure characterized by comprising:   The bumper support structure according to claim 1, wherein the rotation preventing means has a uniform cross-sectional shape made of an extruded material.   The bumper support structure according to claim 1 or 2, wherein the side member is a rear side member at the rear of the vehicle, and the bumper reinforcement is a bumper reinforcement of a rear bumper.   The said rotation prevention means has an attachment part arrange | positioned between the said side member and the said bumper reinforcement, The said attachment part is being fixed to the said side member, The 1-3. The bumper support structure according to any one of the above.   The bumper support structure according to any one of claims 1 to 4, wherein the rotation preventing means includes an inclined portion that connects the side member and a base portion of the bumper reinforcement.   The bumper support structure according to claim 5, further comprising a reinforcing portion that connects a longitudinal end of the side member and an intermediate portion in the vehicle front-rear direction of the inclined portion.   The bumper support structure according to any one of claims 1 to 6, wherein a side cross-sectional shape of the rotation preventing means is a triangle.   5. The mounting portion of the rotation preventing means has a protruding portion that is formed to protrude toward the side member, and the side member is sandwiched between the protruding portion and the rotation preventing means. The bumper support structure according to claim 7.

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