JP3539214B2 - Shock absorbing bumper structure - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a shock absorbing bumper structure.
[0002]
[Prior art]
As a conventional shock absorbing bumper structure, for example, there is one described in Japanese Utility Model Laid-Open No. 5-3052. In the shock absorbing bumper disclosed in this publication, the upper end face terminal portion of the bumper face and the lamp are sandwiched by an elastic clip, and the lower end of the bumper face is attached to the bumper reinforcement with a fastener. An impact absorber is arranged between the front surface of the bumper reinforcement and the bumper face.
[0003]
[Problems to be solved by the invention]
In such a conventional shock absorbing bumper structure, when a shock is received, the shock absorber is deformed to absorb the collision energy, but in other parts, the structure that actively absorbs the shock is used. Has not become.
It has been made in view of the present invention such object, an invention according claims 1 to 6, to provide a shock absorbing bumper structure capable of performing a shock-absorbing even at the lower portion of the bumper and its purpose.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, the lower end of the bumper fascia is attached to a synthetic resin bracket extending in the vehicle width direction, and the bracket is attached to a cross member extending in the vehicle width direction. The bracket has a shock absorbing bumper structure for absorbing a shock at a lower portion of the bumper , and mounting portions of the bracket to the cross member are provided at appropriate intervals along the vehicle width direction. The bracket is characterized in that a mounting wall surface overlapping with the front wall surface of the cross member and a pair of vertical wall surfaces extending forward from both side ends of the mounting wall surface and substantially orthogonal to the vehicle width direction are formed.
The invention according to claim 2 is characterized in that the bracket is provided with a bottom wall surface that connects a lower end of the mounting wall surface and a lower end of the pair of vertical wall surfaces.
[0005]
According to a third aspect of the present invention, in the first or second aspect , the bracket has a rib having a surface substantially orthogonal to the vehicle width direction at a portion other than a portion where the bracket is attached to the cross member. , Is formed.
According to a fourth aspect of the present invention, in the third aspect, an energy absorbing material is filled on both sides of a surface of the bracket that is substantially perpendicular to the vehicle width direction of the rib.
[0006]
According to a fifth aspect of the present invention, in the one of the first to fourth aspects, the bracket has a lower end of the pair of vertical wall surfaces and the mounting wall surface at a mounting portion to the cross member. A bottom wall connecting the lower ends of the bumper fascia is formed, and a front end of the bottom wall extends to a lower end of the opening of the bumper fascia or below the bumper fascia to serve as an outside air introduction unit.
According to a sixth aspect of the present invention, in the device according to any one of the first to fifth aspects, the bracket has an opening of a bumper fascia at a portion other than a portion attached to the cross member. A guide path for guiding outside air from a lower end or a lower part of the bumper fascia toward a rear upper part of the vehicle body is formed.
[0007]
【The invention's effect】
According to the first and second aspects of the present invention, the lower portion of the bumper is mounted between the bumper fascia and the cross member and receives a shock from the bumper fascia by the synthetic resin bracket extending in the vehicle width direction. The reaction force in the above can be increased, and the shock absorption can be improved.
Since the mounting wall surface of the bracket comes into surface contact with the front wall surface of the cross member, the input from the bracket can be received by the cross member, and the vertical wall surface of the bracket receives the input from the front in a shear direction. Therefore, the rigidity and strength of the bracket can be improved, and the reaction force of the bracket can be effectively increased.
In addition, since the mounting wall of the bracket can be mounted to the cross member from the front direction, the mounting operation is easy, and even if there are a large number of mounting portions, the working efficiency does not deteriorate.
[0008]
According to the third aspect of the present invention, in addition to the effects of the first or second aspect, a rib having a surface substantially orthogonal to the vehicle width direction is appropriately provided at a portion other than the mounting portion of the bracket to the cross member. By forming it, the rigidity and strength of the bracket can be further improved.
According to the fourth aspect of the invention, in addition to the effect of the third aspect , since the energy absorbing material presses the rib from both sides of the rib, the deformation of the rib is suppressed, and the rigidity and the rigidity of the bracket are reduced. Strength can be further improved.
[0009]
According to the invention described in claim 5 , in addition to the effect according to any one of claims 1 to 4 , the front end of the bottom wall surface of the bracket serves as an outside air introduction portion at the portion where the bracket is attached to the cross member. Since the outside air is guided along the bottom wall, the outside air can be effectively taken into the vehicle. Thus, the bracket can also have an air guide function.
According to the sixth aspect of the present invention, in addition to the effects of any one of the first to fifth aspects, the lower end of the opening of the bumper fascia or the bumper face is provided at a portion other than the portion to be attached to the cross member. Since the guide path is formed to guide the outside air from below the shear toward the rear upper side of the vehicle body, the outside air can be effectively taken into the vehicle. Thus, the bracket can also have an air guide function.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view illustrating a shock-absorbing bumper structure according to the present invention. Also, in the drawings, the side on which the bumper fascia is disposed is referred to as the front, and the side on which the cross member is disposed is referred to as the rear.
In the drawing, a shock absorbing bumper 10 includes a bumper fascia 12 constituting a bumper skin, and a bumper reinforcement 14 extending in a vehicle width direction is disposed inside a middle part of the bumper 10 in the vertical direction. . An energy absorbing material 16 made of polyurethane or polypropylene foam is disposed between the front surface of the bumper reinforcement 14 and the bumper fascia 12.
[0011]
The lower end 12b of the bumper fascia 12 is bent horizontally toward the inside of the vehicle. The extending portion 12c extending from the lower end 12b is attached to a synthetic resin bracket 18 extending in the vehicle width direction with a bolt nut 19, and the bracket 18 is a cross member which is a strength member extending in the vehicle width direction. 20.
[0012]
The bracket 18 has mounting portions 18a for mounting the bolts and nuts 22 to the cross member 20 at appropriate intervals along the vehicle width direction. That is, as shown in FIG. 3, at each mounting portion 18a, a mounting wall surface 18b overlapping with the front wall surface 20a of the cross member 20, and a pair of a pair extending frontward from both side ends of the mounting wall surface 18b and substantially orthogonal to the vehicle width direction. Vertical wall surfaces 18c, 18c, and a bottom wall surface 18d connecting the lower ends of the pair of vertical wall surfaces 18c, 18c and the lower end of the mounting wall surface 18b are formed, and the upper surfaces of the wall surfaces 18b, 18c, 18d are open. The space is defined. Then, the mounting wall surface 18b is superimposed on the front wall surface 20a and fixed with the bolt and nut 22.
[0013]
On the other hand, at a portion 18e other than the mounting portion 18a of the bracket 18, the rear wall surface 18f overlapping the front wall surface 20a of the cross member 20, the upper end of the rear wall surface 18f and the upper ends of the vertical wall surfaces 18c, 18c of the adjacent mounting portion 18a are connected. A top wall surface 18g to be connected and a front wall surface 18h substantially parallel to the rear wall surface 18f are formed, and these wall surfaces 18f, 18g, and 18h define a space whose lower side is open.
Also, at portions 18e other than the attachment portion 18a of the bracket 18, ribs 18i having a surface substantially orthogonal to the vehicle width direction are formed therein at appropriate intervals.
The shock absorbing bumper structure configured as described above can increase the reaction force at the lower part of the bumper 10 by the bracket 18 receiving the shock input from the bumper fascia 12.
[0014]
If there is no bracket 18 and the structure is such that the lower end of the bumper fascia 12 is extended and directly attached to the cross member 20, the rigidity and strength of the bumper fascia 12 are not high, so that a large reaction force cannot be obtained. On the other hand, in the present embodiment, since the mounting wall surface 18b and the rear wall surface 18f of the bracket 18 are in surface contact with the front wall surface 20a of the cross member 20, the input from the bracket 18 is received by the surface of the cross member 20, Since the vertical wall surface 18c and the rib 18i of the bracket 18 receive the input from the front in the shear direction, the rigidity and strength of the bracket 18 are high, a high reaction force can be obtained, and the impact can be absorbed.
[0015]
Even if a large number of attachment portions 18a are provided, the vertical wall surface 18c increases by that amount, so that the rigidity and strength of the bracket 18 are not impaired, and the reaction force by the bracket 18 can be increased.
The work of attaching the attachment wall surface 18b to the cross member 20 can be performed by attaching the attachment wall surface 18b to the cross member 20 from the front. Since the upper side of the mounting portion 18a is open, the mounting operation is easy, and even if there are many mounting portions 18a, the working efficiency does not deteriorate. After attaching the bracket 18 to the cross member 20, the extending portion 12 c of the bumper fascia 12 is attached to the front flange 18 j of the bracket 18 with a bolt nut 19. The mounting strength between the bracket 18 and the bumper fascia 12 does not need to be higher than the mounting strength between the bracket 18 and the cross member 20. It may be less than the number.
The portion 18e other than the attachment portion 18a defines a space whose lower side is open, but is not limited to this, and may define a space whose rear side is open.
[0016]
Next, FIGS. 4 to 6 are views showing a second embodiment of the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
Similar to the bracket 18, the bracket 28 of this embodiment has a mounting wall 28b overlapping the front wall 20a of the cross member 20 at the mounting portion 28a, and extends forward from both side ends of the mounting wall 28b to extend in the vehicle width direction. A pair of vertical wall surfaces 28c, 28c that are substantially orthogonal to each other, and a bottom wall surface 28d connecting the lower ends of the pair of vertical wall surfaces 28c, 28c and the lower end of the mounting wall surface 28b are formed. It extends to the lower end of the opening 12 a appropriately formed in the shear 12 to form an outside air introduction part.
[0017]
On the other hand, in a portion 28e other than the mounting portion 28a of the bracket 28, the rear wall surface 28f overlapping the front wall surface 20a of the cross member 20, the upper end of the rear wall surface 28f and the upper ends of the vertical wall surfaces 28c, 28c of the adjacent mounting portion 28a are connected. A top wall surface 28g to be connected and a guide wall surface 28h inclined upward and rearward of the vehicle body are formed, and a front lower end of the guide wall surface 28h extends to a lower end of the opening 12a of the bumper fascia 12 to constitute an outside air introduction portion. In addition, the rear upper end of the guide wall surface 28h forms a part of an outlet 28k formed in the top wall surface 28g. A guide path 28m is formed along the guide wall surface 28h from the outside air inlet to the outlet 28k.
[0018]
In the shock absorbing bumper structure configured as described above, the front end of the bottom wall surface 28d serves as an outside air introduction portion at the attachment portion 28a, and the introduced outside air is guided along the bottom wall surface 28d. In addition, at a portion 28e other than the attachment portion 28a, the front lower end of the guide wall surface 28h serves as an outside air introduction portion, and the introduced outside air is guided along the guide path 28m. Thus, the outside air can be effectively taken into the engine room.
Thus, the bracket 28 can also have an air guide function.
[0019]
Next, FIGS. 7 and 8 are diagrams showing a third embodiment of the present invention. The same members as those in the second embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. The bracket 38 of this embodiment differs from the second embodiment in that the front end of the bottom wall surface 38d extends below the bumper fascia 12 at the mounting portion 38a to form an outside air introduction portion. The other mounting wall surface 38b and vertical wall surfaces 38c, 38c are the same as the mounting wall surface 28b, vertical wall surfaces 28c, 28c.
[0020]
Further, also in a part 38e other than the attachment part 38a, the front lower end of the guide wall surface 38h extends to the lower end 12b of the bumper fascia 12 to constitute an outside air introduction part, which is different from the second embodiment. The other rear wall surface 38f, top wall surface 38g, and outlet 38k are the same as the rear wall surface 28f, top wall surface 28g, and outlet 28k.
Also in the shock absorbing bumper structure configured as described above, the front end of the bottom wall surface 38d serves as an outside air introduction portion, and outside air passing below the bumper is introduced, and the introduced outside air is guided along the bottom wall surface 38d. . In addition, in a portion 38e other than the attachment portion 38a, the front lower end of the guide wall surface 38h serves as an outside air introduction portion, and outside air passing below the bumper is introduced, and the introduced outside air is guided along the guide path 38m. Thus, the outside air can be effectively taken into the engine room.
Thus, the bracket 38 can also have an air guide function.
[0021]
Further, in a portion 18e other than the attachment portion 18a of the first embodiment, the energy absorbing material may be filled on both sides of a surface substantially perpendicular to the vehicle width direction of a rib 18i appropriately formed therein. Thereby, since the energy absorbing material presses the rib 18i from both sides of the rib 18i, the deformation of the rib 18i in the vehicle width direction is suppressed, and the rigidity and strength of the bracket 18 can be further improved.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a first embodiment of the present invention, and is a cross-sectional view taken along a cross-section passing through a mounting portion of a bracket to a cross member.
FIG. 2 is a view illustrating the first embodiment of the present invention, and is a cross-sectional view taken along a cross-section passing through a portion other than a mounting portion of the bracket to the cross member.
FIG. 3 is an exploded perspective view of a bracket and a bumper.
FIG. 4 is a view illustrating a second embodiment of the present invention, and is a cross-sectional view taken along a cross-section passing through a mounting portion of a bracket to a cross member.
FIG. 5 is a view illustrating a second embodiment of the present invention, and is a cross-sectional view taken along a cross-section passing through a portion other than a mounting portion of the bracket to the cross member.
FIG. 6 is a partial perspective view of a bracket.
FIG. 7 is a view illustrating a third embodiment of the present invention, and is a cross-sectional view taken along a cross-section passing through a mounting portion of a bracket to a cross member.
FIG. 8 is a view illustrating a third embodiment of the present invention, and is a cross-sectional view taken along a cross-section passing through a portion other than a portion where the bracket is attached to the cross member.
[Explanation of symbols]
10 Shock absorbing bumper 12 Bumper fascia 12a Opening
12b Lower end 18 of bumper fascia 18 Bracket 18a Mounting part 18b Mounting wall 18c Vertical wall 18d Bottom wall
18e Site 18i other than attachment site 18a Rib
20 Cross member 20a Front wall
28 Bracket 28a Mounting part 28b Mounting wall surface 28c Vertical wall surface 28d Bottom wall surface
28e Part other than the attachment part 28a 28m Taxiway
38 Bracket 38a Mounting part 38b Mounting wall 38c Vertical wall 38d Bottom wall
38e Site 38m other than attachment site 38a Taxiway

Claims (6)

A shock absorbing bumper structure in which the lower end of the bumper fascia is attached to a synthetic resin bracket extending in the vehicle width direction, and the bracket is attached to a cross member extending in the vehicle width direction, and the lower portion of the bumper absorbs impact by the bracket. ,
Mounting portions of the bracket to the cross member are provided at appropriate intervals along the vehicle width direction, and in each of the mounting portions, the bracket has a mounting wall surface overlapping the front wall surface of the cross member, and a mounting wall surface of the mounting wall surface. And a pair of vertical wall surfaces extending forward from both side ends and substantially perpendicular to the vehicle width direction. The shock absorbing bumper structure according to claim 1, wherein the bracket has a bottom wall connecting the lower end of the mounting wall and the lower ends of the pair of vertical wall surfaces. The shock absorbing bumper structure according to claim 1 or 2, wherein a rib having a surface substantially orthogonal to the vehicle width direction is appropriately formed on the bracket other than a portion where the bracket is attached to the cross member. . 4. The shock absorbing bumper structure according to claim 3, wherein an energy absorbing material is filled on both sides of a surface of the bracket that is substantially perpendicular to the vehicle width direction of the rib. The bracket has a bottom wall that connects a lower end of the pair of vertical wall surfaces and a lower end of the mounting wall at a mounting portion to the cross member, and a front end of the bottom wall has an opening of a bumper fascia. The shock-absorbing bumper structure according to any one of claims 1 to 4, wherein the shock-absorbing bumper structure extends to the lower end of the portion or below the bumper fascia to form an outside air introduction portion. In the bracket, a guide path for guiding outside air from the lower end of the opening of the bumper fascia or from below the bumper fascia to the rear upper direction of the vehicle body is formed at a portion other than the mounting portion to the cross member. The shock absorbing bumper structure according to any one of claims 1 to 5, characterized in that:

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