JP5324264B2 - Bumper structure - Google Patents

Description

  The present invention relates to a bumper structure attached to a vehicle.

  Conventionally, a front bumper is provided at a front portion of a vehicle, and is configured to absorb an input impact.

  As a pedestrian protection structure using this front bumper area, the pedestrian can be placed on the hood where the hood airbag is deployed by extending the leg wiping member forward and predicting the pedestrian's legs when predicting a collision. A configuration for tilting is known (see, for example, Patent Document 1).

  Adopting this structure necessitates a significant cost increase.

  On the other hand, as a structure with reduced cost, a structure is known in which a plate member is provided on the shroud drawer and extends to the vicinity of the back surface of the bumper face, and a weak portion is set on the plate member (for example, a patent). Reference 2).

  Accordingly, the plate member is deformed by the fragile portion at the time of impact input, so that the impact absorption is increased.

JP 2004-025976 A JP 2008-265399 A

  However, in such a conventional structure, a dedicated part such as a plate member has to be newly set.

  This leads to high costs.

  The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a bumper structure capable of increasing the impact absorbing power without increasing the cost.

In the bumper structure according to claim 1 of the present invention to solve the above problems, a bumper attached to the vehicle, constituted by the bumper body to form a front, a bumper lower surface forming the lower surface, before Symbol bumper An impact energy absorbing part that absorbs energy by being deformed by an external force input to the bumper is set at a connection portion between the main body and the lower surface of the bumper, and an upper portion that extends upward to the tip of the lower surface of the bumper. While providing an extension part, a retreating part that retreats inward from the lower edge of the bumper body, and a lower part that extends downward from the retreating part and faces the upper extension part in a state of wrapping around the back side of the upper extension part The impact energy absorbing portion is configured by forming a plate-like rib projecting toward the upwardly extending portion.

  In other words, because the bumper attached to the vehicle has a long overall length, it is generally divided and formed. The bumper is divided into a bumper body that forms a front surface and a bumper lower surface that forms a lower surface. It is configured. An impact energy absorbing portion that absorbs energy by being deformed by an external force input to the bumper is set at a connection portion between the bumper body and the lower surface of the bumper.

  For this reason, when an external force is input to the bumper, the input energy is absorbed and attenuated by the deformation of the impact energy absorbing portion set at the connecting portion between the bumper body and the lower surface of the bumper.

Further , a plate-like rib extending toward the upward extension provided at the tip of the bumper bottom surface is projected from the opposing portion formed at the lower edge of the bumper body, An impact energy absorbing portion is configured.

  For this reason, when an external force is input to the bumper, the rib is deformed and further bent, whereby the input energy is absorbed and attenuated.

Further , in the bumper structure according to claim 2, the bumper attached to the vehicle is constituted by a bumper main body that forms a front surface and a bumper lower surface that forms a lower surface, and a connection portion between the bumper main body and the bumper lower surface An impact energy absorbing part that absorbs energy by being deformed by an external force input to the bumper is set, and an upwardly extending part extending upward is provided at the tip of the lower surface of the bumper. a retraction unit for recessed from edges inwardly to form a facing portion facing the said upper extending portion in a state of wrapping around to the back side of the extending out the upper extending portion downward from the receding portion, of the facing portion The impact energy absorbing portion was configured by setting a thin breakage portion at the base end .

In other words, because the bumper attached to the vehicle has a long overall length, it is generally divided and formed. The bumper is divided into a bumper body that forms a front surface and a bumper lower surface that forms a lower surface. It is configured. An impact energy absorbing portion that absorbs energy by being deformed by an external force input to the bumper is set at a connection portion between the bumper body and the lower surface of the bumper.
For this reason, when an external force is input to the bumper, the input energy is absorbed and attenuated by the deformation of the impact energy absorbing portion set at the connecting portion between the bumper body and the lower surface of the bumper.
In addition , a thin breakage portion is formed in the facing portion of the bumper body that faces the upward extending portion of the lower surface of the bumper, and the impact energy absorbing portion is configured.

  For this reason, when an external force is input to the bumper, the opposing portion is deformed and broken at the folding breakage portion, so that the input energy is absorbed and attenuated.

Furthermore , in the bumper structure according to claim 3, the bumper attached to the vehicle includes a bumper body that forms a front surface and a bumper lower surface that forms a lower surface, and a connection portion between the bumper body and the lower surface of the bumper. In addition, an impact energy absorbing portion that absorbs energy by being deformed by an external force input to the bumper is set, and an upper extending portion that extends upward is provided at the tip of the lower surface of the bumper, while the bumper forming a setback which recessed inward from the lower edge of the body and a facing portion facing the said upper extending portion in a state of wrapping around to the back side of the extending out the upper extending portion downward from said retracted portion, wherein the honeycomb structure of the honeycomb-shaped plate portion extending obliquely to the upper extending portion is being assembled in a lattice form is provided on the opposite part, and constituting the impact energy absorbing section

In other words, because the bumper attached to the vehicle has a long overall length, it is generally divided and formed. The bumper is divided into a bumper body that forms a front surface and a bumper lower surface that forms a lower surface. It is configured. An impact energy absorbing portion that absorbs energy by being deformed by an external force input to the bumper is set at a connection portion between the bumper body and the lower surface of the bumper.
For this reason, when an external force is input to the bumper, the input energy is absorbed and attenuated by the deformation of the impact energy absorbing portion set at the connecting portion between the bumper body and the lower surface of the bumper.
In addition , a honeycomb-shaped honeycomb structure including a plate portion extending in an oblique direction with respect to an upward extending portion provided at a front end portion of the lower surface of the bumper is provided on a facing portion formed on a lower edge portion of the bumper body. The impact energy absorbing portion is configured.

  For this reason, when an external force is input to the bumper, the honeycomb structure portion is deformed and crushed, whereby the input energy is absorbed and attenuated.

  As described above, in the bumper structure according to claim 1 of the present invention, the bumper formed in consideration of moldability is constituted by the bumper main body forming the front surface and the bumper lower surface forming the lower surface. In addition, the impact energy input to the bumper is reduced by setting an impact energy absorbing portion that deforms and absorbs energy by an external force input to the bumper at a connection portion between the bumper body and the lower surface of the bumper. Can be absorbed and attenuated.

  Therefore, compared with the conventional case where a new dedicated part such as a plate member is newly provided, the impact absorbing power can be increased without increasing the cost, and the pedestrian's leg protection performance can be improved.

Further, the facing portion formed in the lower edge of the front Symbol bumper body, by a plate-like rib extending to protrude toward the bumper lower face of the portion out upwardly extending provided at the distal end, the input An impact energy absorbing portion that absorbs and attenuates the impact energy that has been deformed can be configured.

In the bumper structure according to claim 2, the bumper formed in consideration of moldability is constituted by a bumper body that forms the front surface and a bumper lower surface that forms the lower surface, and the bumper body and the bumper. By setting an impact energy absorbing portion that absorbs energy by being deformed by an external force input to the bumper at a connection portion with the lower surface, the impact energy input to the bumper can be absorbed and attenuated.
Therefore, compared with the conventional case where a new dedicated part such as a plate member is newly provided, the impact absorbing power can be increased without increasing the cost, and the pedestrian's leg protection performance can be improved.
Then, by forming a thin breakage portion in the facing portion of the bumper body that faces the upward extension portion of the lower surface of the bumper , an impact energy absorbing portion that absorbs and attenuates the input impact energy by deformation is configured. be able to.

Further, even in Panpa structure of claim 3, the bumper is divided form in consideration of the moldability, as well as composed of a bumper body forming the front bumper lower face forming the bottom surface, and the bumper body By setting an impact energy absorbing portion that deforms and absorbs energy by an external force input to the bumper at a connection portion with the lower surface of the bumper, the impact energy input to the bumper can be absorbed and attenuated. it can.
Therefore, compared with the conventional case where a new dedicated part such as a plate member is newly provided, the impact absorbing power can be increased without increasing the cost, and the pedestrian's leg protection performance can be improved.
Further, a honeycomb structure portion including a plate portion extending in an oblique direction with respect to an upward extension portion provided at a tip portion of the lower surface of the bumper is provided at a facing portion formed at a lower edge portion of the bumper body. Thus, it is possible to configure an impact energy absorbing unit that attenuates the input impact energy by deformation.

It is a figure which shows 1st embodiment of this invention. (A) is AA sectional drawing of FIG. 1, (b) is BB sectional drawing of FIG. (A) is an enlarged view showing a portion C of FIG. 2, and (b) is a bottom view showing a facing portion of FIG. It is an enlarged view which shows the D section of FIG. It is a figure which shows 2nd embodiment of this invention, and is an enlarged view which shows the site | part corresponded to the C section of FIG. It is a figure which shows 3rd embodiment of this invention, (a) is an enlarged view which shows the site | part corresponded to the C section of FIG. 2, (b) is a bottom view which shows the opposing part of the same figure (a). It is.

  (First embodiment)

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a view showing a front bumper 1 having a bumper structure according to the present embodiment, and the front bumper 1 extends in the vehicle width direction at the lower front end of the vehicle.

  The front bumper 1 is made of synthetic resin. As shown in FIG. 2, the front bumper body 11 that forms a front surface facing the front F side of the vehicle and a lower surface of the front bumper 1 that is connected to the lower portion of the bumper body 11 are formed. The bumper lower surface 12 is formed.

  As shown in FIG. 1, the bumper body 11 includes a front surface portion 21 that forms a vehicle front surface, and an upper surface portion 22 that extends from the upper edge of the front surface portion 21 toward the vehicle rear R. In addition, an opening 23 through which the traveling wind passes is formed below the front surface portion 21. As shown in FIG. 2, the lower opening edge 24 that forms the lower edge of the opening 23 is configured to incline downward toward the vehicle front F. The lower edge portion formed at the front end of the lower opening edge portion 24 is configured to protrude most toward the vehicle front F.

  The bumper lower surface 12 is configured such that a front edge portion thereof is connected to the bumper main body 11, and the front bumper 1 formed by the bumper lower surface 12 and the bumper main body 11 is directed toward the vehicle rear R. It can be formed in a U-shaped cross section that is open. Thereby, the rigidity of the front bumper 1 is ensured.

  As shown in FIG. 2B, the bumper lower surface 12 is supported in a state where the rear edge portion 31 constituting the base end side thereof is overlapped with a support panel 32 provided on the vehicle body. As shown in FIG. 2A, the rear edge portion 31 is fixed to the support panel 32 by bolts 33.

  As shown in FIG. 3A, the front edge portion constituting the front end side of the bumper lower surface 12 is bent upward, and the front end portion extends upward. The extending part 51 is formed over the entire length. Further, at the lower edge of the bumper body 11, a retreating part 52 that retreats toward the rear side, and a state that extends downward from the retreating part 52 and wraps around the back side of the upper extension part 51. Thus, a facing portion 53 facing the upward extending portion 51 is integrally formed. Thereby, it is comprised so that the said bumper main body 11 and the said bumper lower surface 12 can be joined without gap.

  As shown in FIG. 3B, plate-like ribs 61,... Extending toward the upward extending portion 51 are spaced apart from each other at the facing portion 53 formed on the bumper body 11. The ribs 61,... Are set to a length that abuts against the back surface of the upwardly extending portion 51 of the bumper lower surface 12. Each of the ribs 61,... Is formed to be thin and have a width dimension that decreases from the facing portion 53 toward the front end on the vehicle front F side.

  As a result, the connecting portion 71 to which the bumper body 11 and the bumper lower surface 12 are connected is deformed and broken by an external force input to the front bumper 1 as shown in FIG. An impact energy absorbing portion 72 that absorbs energy is set.

  As shown in FIG. 4, the retracted portion 52 formed at the lower edge of the bumper body 11 is provided with a plurality of rearward extending portions 81 that are retracted larger than the general portion toward the vehicle rear R. In each of the rear extending portions 81, a through hole 82 is formed. Each rear extension portion 81 is attached with a metal clip 83 that sandwiches the rear extension portion 81, and the upper sandwiching piece 84 positioned on the upper surface side of the rear extension portion 81 has the above-described penetration. A notch 85 communicating with the hole 82 is formed. From the opening edge of the notch 85, a pair of sandwiching pieces 86, 86 extends from the facing portion, and both the sandwiching pieces 86, 86 are erected in a state where they are inclined in the direction in which the tip ends contact. Yes.

  In addition, the front edge portion of the bumper lower surface 12 is immersed in the upward direction, and a plurality of immersion portions 91 are formed at the plurality of locations, and each of the immersion portions 91 is the rear extension portion 84 of the bumper body 11. It is provided in the place corresponding to. A bolt insertion hole 92 that matches the through hole 82 of the rearward extension 84 is formed in each of the immersion portions 91, and a shaft portion 94 of a resin bolt 93 made of resin is formed in the bolt insertion hole 92. Is configured to be inserted.

  Thus, the resin bolt 93 is inserted into each of the bolt insertion holes 92 and the shaft portion 94 is press-fitted between the clamping pieces 86 and 86 of the clip 83, whereby the bumper lower surface 12 and the bumper main body 11. The resin bolt 93 constitutes a coupling member that penetrates and couples the bumper body 11 and the bumper lower surface 12.

  In the present embodiment according to the above configuration, the front bumper 1 attached to the vehicle has a long overall length, and thus is generally formed in a divided manner, and the front bumper 1 of the present embodiment forms a front surface. The bumper main body 11 is divided into a bumper lower surface 12 that forms a lower surface. An impact energy absorbing portion 72 that is deformed by the external force input to the front bumper 1 and absorbs energy is set in the connecting portion 71 to which the bumper body 11 and the bumper lower surface 12 are connected.

  More specifically, a plate-like rib extending toward the upward extending portion 51 provided at the front end portion of the bumper lower surface 12 is formed on the facing portion 53 formed on the lower edge portion of the bumper body 11. 61,... Are provided so as to constitute the impact energy absorbing portion 72.

  For this reason, when an external force is input to the front bumper 1, the impact energy absorbing portion 72 set in the connecting portion 71 between the bumper body 11 and the bumper lower surface 12 is deformed, that is, the ribs 61,. Is deformed and further broken, it can absorb and attenuate the input energy.

  Therefore, compared with the conventional case in which a dedicated member such as a plate member has to be newly provided, the impact absorbing power can be increased without increasing the cost, and the pedestrian's leg protection performance can be improved. .

  Further, the coupling member that couples to the bumper body 11 and the bumper lower surface 12 is constituted by a resin bolt 93 made of resin.

  For this reason, when an external force is input to the front bumper 1, the resin bolt 93 is broken, so that the input energy can be absorbed and attenuated.

  For this reason, compared with the case where the said bumper main body 11 and the said bumper lower surface 12 are connected with the metal volt | bolt, and cannot absorb an impact energy, a shock absorption power is raised, without providing a new structure. And the pedestrian's leg protection performance can be further enhanced.

In the present embodiment, ribs 61,... That project toward the upwardly extending portion 51 of the bumper lower surface 12 are provided on the facing portion 53 of the bumper body 11 so as to project the impact energy. Although the case where the absorption part 72 was comprised was mentioned as an example and demonstrated, it is not limited to this.

  (Second embodiment)

  FIG. 5 is a diagram showing a second embodiment of the present invention, in which the same or equivalent parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted and different parts are attached. Only explained.

  That is, the upper extension portion 51 extending upward is provided at the tip of the bumper lower surface 12, and the lower edge portion of the bumper body 11 has a retreat portion 52 that retreats inward. A facing portion 53 that extends downward from the retracted portion 52 and faces the upper extending portion 51 in a state of wrapping around the back side of the upper extending portion 51 is integrally formed.

  A V-shaped groove 101 is formed at the base end portion of the facing portion 53, and a thin broken portion 102 is set.

  In the present embodiment according to the above configuration, a thin breakage portion 102 is formed in the facing portion 53 of the bumper body 11 facing the upward extending portion 51 of the bumper lower surface 12, thereby The impact energy absorbing portion 72 is configured.

  For this reason, when an external force is input to the front bumper 1, the opposed portion 53 is deformed and broken at the folding breakage portion 102, so that the input energy can be absorbed and attenuated.

Thereby, there can exist an effect similar to 1st embodiment.

  (Third embodiment)

  FIG. 6 is a diagram showing a third embodiment of the present invention, in which the same or equivalent parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted and different parts are attached. Only explained.

  That is, the upper extension portion 51 extending upward is provided at the tip of the bumper lower surface 12, and the lower edge portion of the bumper body 11 has a retreat portion 52 that retreats inward. A facing portion 53 that extends downward from the retracted portion 52 and faces the upper extending portion 51 in a state of wrapping around the back side of the upper extending portion 51 is integrally formed.

  The honeycomb structure portion 201 is formed on the facing portion 53 facing the upward extending portion 51 so as to be in contact with the upward extending portion 51, and the honeycomb structure portion 201 includes the upward extending portion 51. A plurality of plate portions 202,... Extending obliquely with respect to 51 are assembled in a lattice shape to form a honeycomb shape.

  In the present embodiment having the above-described configuration, the upper extension provided at the tip of the bumper lower surface 12 is provided on the facing portion 53 of the bumper main body 11 facing the upper extension 51 of the bumper lower surface 12. A honeycomb-shaped honeycomb structure portion 201 including plate portions 202 extending in an oblique direction with respect to the portion 51 is provided, and thereby the impact energy absorbing portion 72 is configured.

  For this reason, when an external force is input to the front bumper 1, the honeycomb structure 201 is deformed and crushed, so that the input energy can be absorbed and attenuated.

  Thereby, there can exist an effect similar to 1st embodiment.

DESCRIPTION OF SYMBOLS 1 Front bumper 11 Bumper main body 12 Bumper lower surface 51 Upper extension part 53 Opposing part 61 Rib 71 Connection part 72 Energy absorption part 93 Resin bolt 102 Fracture damage part 201 Honeycomb structure part

Claims (3)

The bumper is attached to the vehicle, constituted by the bumper body to form a front, a bumper lower surface forming the lower surface, the connecting portion between the front Symbol bumper body and the bumper lower face, deformed by an external force inputted to the bumper In addition to setting an impact energy absorption part that absorbs energy ,
While providing an upward extending portion extending upward at the tip of the lower surface of the bumper,
A receding portion that recedes inward from the lower edge of the bumper body and an opposing portion that extends downward from the receding portion and wraps around the back side of the upper extending portion and faces the upper extending portion. ,
A bumper structure characterized in that the impact energy absorbing portion is configured by projecting a plate-like rib extending toward the upward extending portion at the facing portion . A bumper attached to a vehicle is composed of a bumper main body that forms a front surface and a bumper lower surface that forms a lower surface, and a connection portion between the bumper main body and the bumper lower surface is deformed by an external force input to the bumper While setting the impact energy absorption part that absorbs energy,
While providing an upward extending portion extending upward at the tip of the lower surface of the bumper,
A retraction unit for recessed from the inner lower edge of the bumper body, to form a facing portion facing the said upper extending portion in a state of wrapping around to the back side of the extending out the upper extending portion downward from said setback ,
A bumper structure characterized in that the impact energy absorbing portion is configured by setting a thin breakage portion at a base end portion of the facing portion. A bumper attached to a vehicle is composed of a bumper main body that forms a front surface and a bumper lower surface that forms a lower surface, and a connection portion between the bumper main body and the bumper lower surface is deformed by an external force input to the bumper. While setting the impact energy absorption part that absorbs energy,
While providing an upward extending portion extending upward at the tip of the lower surface of the bumper,
A retraction unit for recessed from the inner lower edge of the bumper body, to form a facing portion facing the said upper extending portion in a state of wrapping around to the back side of the extending out the upper extending portion downward from said setback ,
The impact energy absorbing portion is configured by providing , in the facing portion, a honeycomb-shaped honeycomb structure portion in which plate portions extending obliquely with respect to the upward extending portion are assembled in a lattice shape. Bumper structure.

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