JP2004196018A - Vehicle bumper support structure - Google Patents

Abstract

An object of the present invention is to improve the axial force of the side member in the front-rear direction, and to improve the support rigidity of the bumper arm.
The cross section of the front end of the front side member viewed from the vehicle front-rear direction is hexagonal, and has six ridge lines extending in the vehicle front-rear direction.
In addition, the extending portion 40C of the radiator support front 40 disposed across the inclined portion 20 extending from the vehicle width direction outer upper portion formed in the vehicle width direction inner upper portion of the front side member 10 to the vehicle width direction inner lower portion, The vehicle width direction inner wall portion 26B of the bumper arm support bracket upper 26 at the vehicle width direction inner side and the vehicle width direction inner wall portion 10B of the front side member 10 are connected.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bumper support structure for a vehicle, and more particularly to a bumper support structure for a vehicle provided with a polygonal cross-sectional side member having improved axial force in the front-rear direction.
[0002]
[Prior art]
Conventionally, in a bumper support structure of a vehicle, a corner plate is joined to a front end of a front side member joined on a front cross member, and a corner with a reinforcing wall is protruded toward the center of the vehicle body to form an expanded portion. The front end of the inner side wall of the front side member is bent and formed inside the front side member to form a closed cross-section between the front end and the extended portion. Is known by combining a bolt and a nut (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-7-40858 (paragraph [0017], FIG. 2)
[0004]
[Problems to be solved by the invention]
In such a bumper support structure for a vehicle, in order to improve the axial force of the side member in the front-rear direction, the cross-sectional shape of the tip portion of the side member viewed from the vehicle front-rear direction is polygonal, for example, as shown in FIG. A configuration is known in which the cross-sectional shape of the distal end portion of the side member 70 when viewed from the vehicle front-rear direction is hexagonal. However, when the cross-sectional shape of the tip portion of the side member 70 as viewed from the front-rear direction of the vehicle is hexagonal, the bumper arm support bracket 72 fixed to the upper surface 70A of the side member 70 for mounting the bumper arm is formed. A ridge line 72A along the vehicle front-rear direction of the support bracket 72 located below the fixing point P1 inside the vehicle width direction of the pair of left and right bumper arm fixing points P1, P2 is a ridge line along the vehicle front-rear direction on the side member 70. L1, L2, L3, L4, L5, L6 are far away from the ridgeline L1 on the upper side in the vehicle width direction, and there is no member supporting the ridgeline 72A.
As a result, the bumper arm support bracket 72 is easily deformed in the downward direction of the vehicle (in the direction of the arrow M), and the support rigidity of the bumper arm is reduced.
[0005]
The present invention has been made in view of the above circumstances, and has as its object to provide a bumper support structure for a vehicle that can improve the axial force of the side members in the front-rear direction and can increase the support rigidity of the bumper arm.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, a cross-sectional shape of the distal end portion of the side member disposed along the vehicle front-rear direction when viewed from the vehicle front-rear direction is a polygonal shape having an inclined portion at at least one of four corners. A vehicle bumper support structure,
A bumper arm support bracket fixed to an upper surface or a lower surface of the side member and supporting a bumper arm;
A connecting member that connects the vehicle width direction side wall portion of the bumper arm support bracket and the vehicle width direction side wall portion of the side member across the inclined portion of the side member;
It is characterized by having.
[0007]
Therefore, by forming the cross-sectional shape of the tip of the side member in the vehicle front-rear direction as a polygonal shape, the number of ridge lines extending along the vehicle front-rear direction at the tip of the side member increases, and the axial force of the side member in the front-rear direction is increased. Can be improved. Further, a connecting member disposed across the inclined portion formed at at least one of the four corners of the side member connects the vehicle width direction side wall portion of the bumper arm support bracket and the vehicle width direction side wall portion of the side member. Therefore, the deformation of the bumper arm support bracket toward the inclined portion can be prevented. As a result, the support rigidity of the bumper arm can be improved.
[0008]
According to the second aspect of the present invention, the cross-sectional shape of the distal end portion of the side member disposed along the vehicle body front-rear direction as viewed from the vehicle front-rear direction is at least the vehicle width direction inner upper portion and the vehicle width direction outer upper portion. A bumper support structure for a vehicle having a polygonal shape with an inclined portion facing a lower side in the direction,
A bumper arm support bracket fixed to the upper surface of the side member and supporting a bumper arm;
A connecting member that straddles the inclined portion of the side member and connects a vehicle width direction inner portion of the bumper arm support bracket and a vehicle width direction inner wall portion of the side member;
It is characterized by having.
[0009]
Therefore, by forming the cross-sectional shape of the tip of the side member in the vehicle front-rear direction as a polygonal shape, the number of ridge lines extending along the vehicle front-rear direction at the tip of the side member increases, and the axial force of the side member in the front-rear direction is increased. Can be improved. Also, a connecting member disposed across the inclined portion from the upper side in the vehicle width direction to the lower side in the vehicle width direction formed on the upper side in the vehicle width direction of the side member, the connecting member disposed in the vehicle width direction inner portion of the bumper arm support bracket. Since the side member is connected to the inner side wall portion in the vehicle width direction, the deformation of the bumper arm support bracket toward the inclined portion can be prevented. As a result, the support rigidity of the bumper arm can be improved.
[0010]
According to a third aspect of the present invention, in the vehicle bumper support structure according to any one of the first and second aspects, the connection member is an extension of a radiator support member.
[0011]
Therefore, in addition to the contents described in any one of the first and second aspects, since the connecting member is configured by the extended portion of the radiator supporting member, the number of components can be reduced without the need for a separate member.
[0012]
According to a fourth aspect of the present invention, in the vehicle bumper support structure according to any one of the first and second aspects, the connecting member is an extension of the bumper arm support bracket.
[0013]
Therefore, in addition to the contents described in any one of the first and second aspects, since the connecting member is formed by the extended portion of the bumper arm support bracket, the number of components can be reduced without the need for a separate member.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a bumper support structure for a vehicle according to the present invention will be described with reference to FIGS.
[0015]
In the drawings, an arrow FR indicates a forward direction of the vehicle body, an arrow UP indicates an upward direction of the vehicle body, and an arrow IN indicates an inward direction of the vehicle width.
[0016]
As shown in FIG. 1, in the present embodiment, a pair of left and right front side members 10 (right side of the vehicle) as side members disposed along the vehicle front-rear direction near the lower ends of the front side of the vehicle body in the vehicle width direction. (Only the front side members are shown). A bumper reinforcement 14 of a front bumper is attached to a front end of the front side member 10 via a bumper arm 12.
[0017]
As shown in FIG. 4, the front portion (tip portion) of the front side member 10 includes a front side member inner 16 that forms the vehicle width direction inside portion of the front side member 10 and a vehicle width direction outside portion of the front side member 10. And an inclined portion 20 having a cross-sectional shape viewed from the vehicle front-rear direction and having at least an upper portion in the vehicle width direction inner side directed from the vehicle width direction outer upper portion to the vehicle width direction inner lower portion. It has a polygonal shape.
[0018]
That is, in the present embodiment, the cross-sectional shape of the front portion of the front side member 10 as viewed from the vehicle front-rear direction is hexagonal, and the connecting portion between the upper wall portion 10A and the vehicle width direction inner wall portion 10B is inclined. The section 20. Further, a connecting portion between the lower wall portion 10C and the inner wall portion 10B in the vehicle width direction is also an inclined portion 22.
[0019]
As shown in FIG. 1, a base 26A of a retainer upper 26 as a bumper arm support bracket is welded to a front end of an upper surface of an upper wall 10A of the front side member 10.
[0020]
As shown in FIG. 2, the base 26A of the retainer upper 26 is formed in a rectangular plate shape, and a vehicle width direction inner wall 26B is formed upward at the vehicle width direction inner end of the base 26A. . A flange 26C is formed upward at the front end of the base 26A of the retainer upper 26, and mounting holes 28 and 30 are formed near both ends in the vehicle width direction of the flange 26C.
[0021]
Further, a reinforcing bead 26E is formed at the center in the vehicle width direction of a corner 26D between the base 26A of the retainer upper 26 and the flange 26C.
[0022]
As shown in FIG. 1, a rectangular plate-shaped mounting portion 12A is provided at the rear end of the bumper arm 12, and a pair of left and right mounting holes 34, 36 are formed in the upper portion of the mounting portion 12A. I have. Although not shown, a pair of left and right mounting holes is also formed below the mounting portion 12A.
[0023]
A radiator support front 40 as a radiator support member is provided between the mounting portion 12A of the bumper arm 12 and the front end of the front side member 10.
[0024]
As shown in FIG. 2, the base 40A of the radiator support front 40 has a rectangular plate shape, and a pair of left and right mounting holes 42 and 44 are formed in the upper part of the base 40A. A pair of left and right mounting holes 46 and 48 are formed below the base 40A of the radiator support front 40.
[0025]
At the upper end of the base 40A of the radiator support front 40, an engagement piece 40B is formed toward the rear of the vehicle, and the engagement piece 40B is engaged with the upper surface of the flange 26C of the retainer upper 26. An extended portion 40C as a connecting member is formed at the vehicle width direction inner end of the base portion 40A of the radiator support front 40 toward the vehicle rear, and an upper portion is provided at a rear end of the extended portion 40C. Except for, a flange 40D is formed inward in the vehicle width direction.
[0026]
A base 50A of the lower retainer 50 is welded to the lower surface of the front end of the lower wall 10C of the front side member 10, and a mounting hole 52 is formed in the front wall 50B of the lower retainer 50. A mounting hole 54 is formed near the lower end of a flange 10D formed at the front end of the front side member 10 outward in the vehicle width direction.
[0027]
As shown in FIG. 1, the base 40A of the radiator support front 40 is welded to the flange 26C of the retainer upper 26, the flange 10D of the front side member 10, and the front wall 50B of the retainer lower 50.
[0028]
As shown in FIG. 4, the extending portion 40 </ b> C of the radiator support front 40 extends across the inclined portion 20 of the front side member 10 and the front portion of the vehicle width direction inner side wall portion 26 </ b> B of the retainer upper 26 and the vehicle of the front side member 10. It is welded to the front part of the width direction inner wall part 10B. Further, the extending portion 40C of the radiator support front 40 is also welded to the vehicle width direction inner side wall portion 50C of the retainer lower 50 across the inclined portion 22 of the front side member 10.
[0029]
As shown in FIG. 1, mounting bolts 34, 36 of the mounting portion 12A of the bumper arm 12, mounting holes 42, 44 of the radiator support front 40, and mounting holes 28, 30 of the retainer upper 26 are provided from the front side of the vehicle. 60 and 62 are inserted, and nuts 64 and 66 are screwed into these bolts 60 and 62 from the vehicle rear side.
[0030]
Similarly, also at the lower part of the mounting portion 12A of the bumper arm 12, the mounting holes (not shown) of the mounting portion 12A of the bumper arm 12, the mounting holes 46 and 48 of the radiator support front 40, and the mounting holes of the flange 10D of the front side member 10 are provided. Mounting bolts (not shown) are inserted into the mounting holes 52 of the retainer lower 28 from the vehicle front side, and nuts (not shown) are screwed into these bolts from the vehicle rear side.
[0031]
As shown in FIG. 3, the flange 40D of the radiator support front 40 is welded to the vehicle width direction inner side wall portion 10B of the front side member 10 via the radiator support strainer 68.
[0032]
Next, the operation of the present embodiment will be described.
[0033]
In the present embodiment, as shown in FIG. 4, the cross-sectional shape of the front end of the front side member 10 when viewed from the vehicle front-rear direction is hexagonal, so that the ridge line extending along the vehicle front-rear direction of the front side member 10. L1, L2, L3, L4, L5, and L6 are six, and the number of ridge lines is two more than the square cross-sectional shape (four ridge lines). For this reason, the axial force of the front side member 10 in the front-rear direction can be improved.
[0034]
In addition, the extending portion 40C of the radiator support front 40 disposed across the inclined portion 20 extending from the vehicle width direction outer upper portion formed in the vehicle width direction inner upper portion of the front side member 10 to the vehicle width direction inner lower portion, The vehicle width direction inner wall portion 26B of the bumper arm support bracket upper 26 at the vehicle width direction inner side and the vehicle width direction inner wall portion 10B of the front side member 10 are connected. As a result, it is possible to prevent the base 26A of the bumper arm support bracket upper 26 from being deformed toward the inclined portion 20 (in the direction of arrow A in FIG. 4). Further, the bumper arm support bracket upper 26 can be prevented from being deformed downward (in the direction of arrow B in FIG. 1) on the front side of the vehicle. Therefore, the support rigidity of the bumper arm 12 can be improved.
[0035]
Further, in the present embodiment, the extension of the radiator support front 40 disposed across the inclined portion 22 from the vehicle width direction outer lower portion formed at the vehicle width direction inner lower portion of the front side member 10 toward the vehicle width direction inner upper portion. The installation portion 40C connects the inner wall portion 50C of the retainer lower 50 in the vehicle width direction and the inner wall portion 10B of the front side member 10 in the vehicle width direction. As a result, deformation of the base 50A of the retainer lower 50 toward the inclined portion 22 (in the direction of arrow C in FIG. 4) can be prevented. Therefore, the support rigidity of the bumper arm 12 can be further improved.
[0036]
Further, in the present embodiment, the mounting portion 12A of the bumper arm 12 is mounted near each of the six ridge lines L1, L2, L3, L4, L5, L6 of the front side member 10 with six bolts. , The number of bolts can be reduced by two, and two bolts (bolts near the ridge lines L1 and L2) that overlap with the bumper reinforcement 14 in the vehicle front-rear direction are eliminated. The mounting workability of the reinforcement 14 is also improved.
[0037]
Further, in the present embodiment, since the connecting member is configured by the extended portion 40C of the radiator support front 40, no separate member is required, and the number of components can be reduced.
[0038]
In the above, the present invention has been described in detail with respect to a specific embodiment, but the present invention is not limited to such an embodiment, and various other embodiments are possible within the scope of the present invention. Some will be apparent to those skilled in the art. For example, as shown in FIGS. 5 and 6, the vehicle width direction inner side wall portion 26 </ b> B of the retainer upper 26 as a bumper arm support bracket is extended downwardly of the vehicle by the extension portion 26 </ b> F, and the front side member 10 is inwardly mounted in the vehicle width direction. A vehicle width direction inner wall portion 26B of the retainer upper 26 and a vehicle width direction inner wall portion 10B of the front side member 10 are straddled over an inclined portion 20 formed at an upper portion from a vehicle width direction outer upper portion to a vehicle width direction inner lower portion. May be connected.
[0039]
Further, the vehicle width direction inner side wall portion 26B of the retainer upper 26 and the front side member 10 are straddled over the inclined portion 20 of the front side member 10 using a connecting member separate from the radiator support front 40 or the retainer upper 26. May be connected to the vehicle inner wall portion 10B in the vehicle width direction.
[0040]
In the above embodiment, the cross-sectional shape of the front portion of the front side member 10 as viewed from the vehicle front-rear direction is hexagonal, but the cross-sectional shape of the front portion of the front side member 10 as viewed from the vehicle front-rear direction is hexagonal. The shape is not limited to the shape, and may be another polygonal shape such as a pentagonal shape.
[0041]
Further, the vehicle bumper support structure of the present invention is also applicable to a rear bumper of a vehicle.
[0042]
【The invention's effect】
According to the first aspect of the present invention, a cross-sectional shape of the distal end portion of the side member disposed along the vehicle front-rear direction when viewed from the vehicle front-rear direction is a polygonal shape having an inclined portion at at least one of four corners. A bumper support structure for a vehicle, comprising: a bumper arm support bracket fixed to an upper surface or a lower surface of a side member to support a bumper arm; a vehicle width direction side wall portion of the bumper arm support bracket and a vehicle of the side member straddling an inclined portion of the side member. And a connecting member for connecting the side member to the width direction side wall, so that the axial force of the side member in the front-rear direction can be improved and the support rigidity of the bumper arm can be improved.
[0043]
According to the second aspect of the present invention, the cross-sectional shape of the distal end portion of the side member disposed along the vehicle body front-rear direction as viewed from the vehicle front-rear direction is at least the vehicle width direction inner upper portion and the vehicle width direction outer upper portion. A bumper support structure for a vehicle having a polygonal shape with a slope directed toward the lower side in the direction, comprising a bumper arm support bracket fixed to an upper surface of a side member to support a bumper arm, and a bumper arm support straddling the slope of the side member. It has a connecting member that connects the inner side portion of the bracket in the vehicle width direction and the inner wall portion of the side member in the vehicle width direction, so that the axial force of the side member in the front-rear direction can be improved, and the support rigidity of the bumper arm can be improved. Has excellent effects.
[0044]
According to a third aspect of the present invention, in the vehicle bumper support structure according to any one of the first and second aspects, the connecting member is an extension of the radiator support member. In addition to the effects described in (1), there is an excellent effect that the number of parts can be reduced.
[0045]
According to a fourth aspect of the present invention, in the vehicle bumper support structure according to any one of the first and second aspects, the connecting member is an extension of the bumper arm support bracket. In addition to the effects described in (1), there is an excellent effect that the number of parts can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a bumper support structure of a vehicle according to an embodiment of the present invention, as viewed from an obliquely front inner side of the vehicle.
FIG. 2 is an exploded perspective view showing the bumper support structure of the vehicle according to the embodiment of the present invention, as viewed obliquely from the front inside the vehicle.
FIG. 3 is a perspective view showing the bumper support structure of the vehicle according to the embodiment of the present invention, as viewed obliquely from the rear inside the vehicle.
FIG. 4 is a cross-sectional view of the vehicle bumper support structure according to the embodiment of the present invention, as viewed from the front of the vehicle.
FIG. 5 is a perspective view showing a main part of a bumper support structure of a vehicle according to another embodiment of the present invention, as viewed from the obliquely front inner side of the vehicle.
FIG. 6 is a cross-sectional view of a bumper support structure for a vehicle according to another embodiment of the present invention, as viewed from the front of the vehicle.
FIG. 7 is a sectional view showing a bumper support structure of a vehicle according to a comparative example, as viewed from the front of the vehicle.
[Explanation of symbols]
10 Front Side Member 10A Front Wall Upper Wall 12 Bumper Arm 14 Bumper Reinforcement 20 Front Side Member Inclined Part 26 Retainer Upper (Bumper Arm Support Bracket)
Extension part of 26F retainer upper (connecting member)
40 Radiator support front 40C Extension part of radiator support front (connecting member)

Claims (4)

A bumper support structure for a vehicle, wherein a cross-sectional shape of the distal end portion of the side member disposed along the vehicle body front-rear direction when viewed from the vehicle front-rear direction is a polygonal shape having an inclined portion in at least one of four corners,
A bumper arm support bracket fixed to an upper surface or a lower surface of the side member and supporting a bumper arm;
A connecting member that connects the vehicle width direction side wall portion of the bumper arm support bracket and the vehicle width direction side wall portion of the side member across the inclined portion of the side member;
A bumper support structure for a vehicle, comprising: A cross-sectional shape as viewed from the vehicle front-rear direction at the distal end of the side member disposed along the vehicle front-rear direction has an inclined portion at least at the vehicle width direction inner upper portion from the vehicle width direction outer upper portion to the vehicle width direction inner lower portion. A bumper support structure for a vehicle having a polygonal shape,
A bumper arm support bracket fixed to the upper surface of the side member and supporting a bumper arm;
A connecting member that straddles the inclined portion of the side member and connects a vehicle width direction inner portion of the bumper arm support bracket and a vehicle width direction inner wall portion of the side member;
A bumper support structure for a vehicle, comprising: The bumper support structure for a vehicle according to any one of claims 1 and 2, wherein the connection member is an extension of a radiator support member. 3. The bumper support structure for a vehicle according to claim 1, wherein the connection member is an extension of the bumper arm support bracket.

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