JP6070393B2 - Vehicle front structure - Google Patents

Description

  The present invention includes a front bumper that includes a front bumper that constitutes a front surface of a vehicle, a lateral structural member that extends in the vehicle width direction on the rear side of the front bumper, and an absorber that is attached to the upper portion of the lateral structural member across the vehicle width direction. Concerning structure.

  In the front part of the vehicle, a shock absorber (hereinafter referred to as an absorber) is provided inside a front bumper (also referred to as a bumper cover) which is a design part for the purpose of protecting the thigh of a pedestrian, particularly a pedestrian. ) May be set (for example, Patent Document 1). At the time of a frontal collision of the vehicle, the absorber is cracked or the absorber is deformed, so that the load at the time of the collision is alleviated and the load applied to the thigh of the pedestrian in contact with the vehicle is reduced.

JP 2006-193078 A

  However, as in Patent Document 1, when the distance between the front bumper and the structural member to which the absorber is attached (the radiator support upper in Patent Document 1) is narrow, the absorber is stretched. Then, it is difficult for the absorber to be deformed at the time of contact with the pedestrian, and there is a possibility that the effect of absorbing the load (referred to as the load absorption effect), that is, the effect of reducing the load on the pedestrian cannot be sufficiently exhibited. Therefore, there is still room for improvement in the technique of Patent Document 1.

  In view of such a problem, an object of the present invention is to provide a vehicle front structure capable of suitably deforming an absorber and thereby enhancing a load absorption effect.

  In order to solve the above problems, a typical configuration of a vehicle front structure according to the present invention includes a front bumper having a design surface that is inclined so as to form a front surface of a vehicle and rise toward the rear of the vehicle, and a front bumper. The vehicle front part structure includes a lateral structural member extending in the vehicle width direction on the rear side of the vehicle and an absorber attached to an upper portion of the lateral structural member over the vehicle width direction, the absorber being along the back surface of the design surface of the front bumper And a rear part extending downward while descending from the rear end of the front part and having a lower end joined to the upper part of the lateral structural member, and the lower edge of the absorber is upward when viewed from the side of the vehicle It is curved or bent so as to be convex, and the vertex of the curve or bending is located below the rear end of the design surface of the front bumper in the vehicle longitudinal direction.

  According to the above configuration, when a pedestrian contacts the front bumper from the front of the vehicle, while absorbing the load at the time of contact, the vicinity of the apex that is curved or bent (hereinafter simply referred to as apex), that is, the design of the front bumper The front part of the absorber is located downward with the lower part near the rear end of the surface as a base point. Then, the load is further absorbed by deforming (moving) so that the front surface portion rotates downward from the base point. As described above, since the load can be absorbed by both the bending and deformation of the absorber, the load absorbing effect is enhanced, and the load on the pedestrian is further reduced. Further, since the front portion of the absorber extends along the back surface of the design surface of the front bumper, when the load is applied to the front bumper during normal times, the load can be received by the front portion. Therefore, according to the above configuration, it is also possible to suppress stickiness of the front bumper due to a load received during normal operation.

  In the above and the following description, the lower part of the rear end of the design surface of the front bumper does not indicate only the strict vertical lower part of the rear end of the design surface, but may be substantially lower. That is, the lower side of the rear end of the design surface of the front bumper refers to the lower side near the rear end of the design surface.

  The absorber may further include a vertical rib erected from the lower surface of the front surface portion to the front surface of the rear surface portion, and the lower edge may be the lower edge of the vertical rib. According to such a configuration, the vicinity of the rear end of the design surface of the front bumper is bent by bending the vicinity of the curved or bent vertex of the vertical rib (hereinafter simply referred to as the vertex) while absorbing the load at the time of contact. The front part of the absorber is located downward from the bottom. Therefore, a high load absorption effect can be obtained as described above. Further, by providing the ribs, it is possible to adjust the load absorbing effect of the absorber according to the thickness and number of the ribs.

  The lower end of the rear part of the absorber may be in surface contact with the upper part of the horizontal structural member. According to this configuration, the holding force (resistance force) against the bending moment (rotational moment) can be increased at the joint portion between the absorber and the lateral structural member. Therefore, even if the load which rotates the whole absorber is applied, the horizontal structure member can support an absorber suitably. For this reason, the above-mentioned effect can be obtained with certainty without causing the absorber to be broken behind the vicinity of the rear end of the design surface of the front bumper due to the rotational moment (load).

  The dimension of the vertical rib in the vehicle height direction may be the largest below the rear end of the design surface of the front bumper between the front end and the rear end of the design surface of the front bumper. Thereby, the intensity | strength of the vertical rib in the downward vicinity of the rear end vicinity of the design surface of the front bumper which is a bend base point can be raised, and it becomes possible to acquire the effect mentioned above more suitably.

  The absorber may further include a lateral rib that is erected from the lower surface of the front portion below the rear end of the design surface of the front bumper and extends in the vehicle width direction. Thereby, since the vertical rib in the vicinity of the bent base point is reinforced by the horizontal rib, it is possible to improve the strength of the vertical rib and further enhance the above-described effects.

  The vertical rib may include a region standing from the front surface of the back surface portion and extending to the front end of the upper portion of the horizontal structural member. Thereby, the intensity | strength of the back surface part extended between the front part of an absorber and a horizontal structure member can be raised. Therefore, even when a load is applied to a member disposed above the horizontal structural member, for example, the front hood, the shape of the back surface portion is firmly maintained, so that the above-described effects can be obtained more reliably. It becomes.

  ADVANTAGE OF THE INVENTION According to this invention, an absorber can be deform | transformed suitably and the vehicle front part structure which can improve the impact absorption effect by it can be provided.

It is a whole perspective view of the vehicle front part structure concerning this embodiment. It is a whole perspective view of the internal structure of the vehicle front part structure of FIG. It is sectional drawing of FIG.1 (b). It is a rear view of the absorber concerning this embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is an overall perspective view of a vehicle front structure 100 according to the present embodiment, FIG. 1 (a) is an external perspective view of the vehicle front structure 100, and FIG. 1 (b) is FIG. 1 (a). The vehicle front part structure 100 in which the front hood 102 and the front bumper 110 are permeated is shown (the front hood 102 and the front bumper 110 are shown by a two-dot chain line). FIG. 2 is an overall perspective view of the internal structure of the vehicle front structure 100 of FIG. 1, and FIG. 2 (a) is a state where the absorber 130 is attached to the hood lock member 120 which is a lateral structure member of the present embodiment. FIG. 2B shows a state where the absorber 130 is removed from the hood lock member 120. In the present embodiment, the hood lock member 120 is illustrated as a horizontal structural member, but the present invention is not limited to this, and any other member that extends in the vehicle width direction on the back side of the front bumper 110 may be used. Also good.

  As shown in FIG. 1A, in the vehicle front structure 100 according to the present embodiment, the front bumper 110 forms the front surface of the vehicle. The design surface 110a of the front bumper 110 is inclined so as to rise toward the rear of the vehicle. A front hood 102 that constitutes the upper surface of the front portion of the vehicle and covers the engine room (not shown) is disposed on the vehicle rear side of the front bumper 110. Further, on the back side of the front bumper 110, a hood lock member 120 shown in FIG. 2B is arranged as a lateral structural member extending in the vehicle width direction.

  3 is a cross-sectional view of FIG. 1 (b), FIG. 3 (a) is a cross-sectional view taken along line AA of FIG. 1 (b), and FIG. 3 (b) is a cross-sectional view taken along line BB of FIG. It is sectional drawing. FIG. 4 is a rear view of the absorber 130 according to the present embodiment. In order to facilitate understanding, FIGS. 3A and 3B show the front hood 102 and the front bumper 110 that are permeated in FIG. 1B.

  As shown in FIG. 2A, an absorber 130, which is a member that absorbs a load, is attached to the upper portion of the hood lock member 120 (see FIG. 2B) over the vehicle width direction. As shown in FIGS. 3A and 3B, in this embodiment, the upper end of the absorber 130 is joined to the rear end of the front bumper 110 by a bolt (not shown), and the lower end of the rear portion is joined by the bolt 104. It is joined to the upper part of the hood lock member 120. In addition, although the joining by bolting was illustrated in this embodiment, it is not limited to this, You may employ | adopt another method.

  As shown in FIGS. 3A and 3B, the absorber 130 extends rearward while descending from the rear end of the front surface portion 132 and a front surface portion 132 extending along the rear surface of the design surface 110 a of the front bumper 110. And a back portion 134 joined to the upper portion of the hood lock member 120. Since the front surface portion 132 extends along the back surface of the design surface 110a of the front bumper 110 as described above, a load applied to the front bumper 110 in a normal state can be received by the front surface portion 132, and the front bumper 110 due to the load can be received. It becomes possible to suppress the stickiness.

  As shown in FIGS. 3A and 3B and FIG. 4, vertical ribs 136 are formed on the rear surface of the absorber 130 so as to stand from the lower surface of the front surface portion 132 to the front surface of the rear surface portion 134. As a feature of the present embodiment, as shown in FIG. 3A, the lower edge of the vertical rib 136 is curved so as to be convex upward when viewed from the side of the vehicle. The bumper 110 is located near the rear end of the design surface 110 a of the bumper 110 and below the parting line between the front bumper 110 and the front hood 102. In other words, in the present embodiment, the lower edge of the vertical rib 136 is curved upward and convex so that the apex T of the curve is located below the rear end of the design surface 110a of the front bumper 110 when viewed from the side of the vehicle. Thus, the lower edge of the absorber 130 is curved so as to protrude upward when viewed from the side of the vehicle, and the apex T of the curve is positioned below the vicinity of the rear end of the design surface 110a of the front bumper 110.

  With the above configuration, for example, when the collider 106 comes into contact with the front bumper 110 from the front of the vehicle, such as the thigh of a pedestrian, the vertical rib 136 absorbs the load at the time of contact and near the apex T that is curved ( Hereinafter, it bends with the lower point near the rear end of the design surface 110a of the front bumper 110 as a base point. In FIG.3 (b), the base point P is illustrated as a flexible base point. Then, due to the bending, the front surface portion 132 of the absorber 130 becomes downward with the lower portion near the rear end of the design surface 110a of the front bumper 110 as a base point, and the load is absorbed.

  After the absorber 130 is bent, the vertical rib 136 is bent with the bending base point P as a base point, and the absorber 130 is located at a front portion (partially cut off between the front bumper 110 and the front hood 102) near the rear end of the design surface 110a of the front bumper 110. The front portion 132 which is a more forward portion is deformed (moved) so as to rotate downward as indicated by a two-dot chain line in FIG. This deformation further absorbs the load when the collider 106 contacts.

  As described above, the load is absorbed by the bending of the absorber 130, and then the load can be absorbed by further deforming the front portion of the absorber 130. Thus, the load absorbing effect is enhanced, and the collider 106 (walking) The load on the person's thigh) can be further reduced. Further, by setting the vertical rib 136 as in the present embodiment, the load absorbing effect of the absorber 130 can be adjusted according to the thickness and number of the ribs 136.

  Further, in the present embodiment, as shown in FIG. 3A, the dimension H in the vehicle height direction of the vertical rib 136 is set between the front end and the rear end of the design surface 110 a of the front bumper 110. It is set so as to be the largest in the lower part near the rear end of the design surface 110a. Thereby, between the front end of the design surface 110a of the front bumper 110, and the rear end, the intensity | strength of the vertical rib 136 in the downward vicinity of the rear end of the design surface 110a of the front bumper 110 which is a flexible base point increases. Therefore, the absorber 130 is not broken from the front portion of the front bumper 110 and the front hood 102 as a base point, and the above-described effects can be obtained with certainty.

  Further, in the present embodiment, as shown in FIGS. 3A and 4, the absorber 130 is erected from the lower surface of the front surface portion 132 in the vicinity of the rear end of the design surface 110 a of the front bumper 110 and extends in the vehicle width direction. It further has a lateral rib 138 that extends. As a result, the vicinity of the bending base point P in the vertical rib 136 (see FIG. 3B) is reinforced by the horizontal rib 138. Therefore, similarly to the above, the absorber 130 is prevented from being bent based on the front part of the front bumper 110 and the front hood 102, and a high load absorbing effect can be obtained.

  Further, in the present embodiment, as shown in FIGS. 3A and 3B, the vertical rib 136 has a region 136 a that stands from the front surface of the back surface portion 134 and extends to the front end of the upper portion of the hood lock member 120. include. In other words, a region of the vertical rib 136 that is erected from the front surface of the back surface portion 134 and extends forward of the vehicle has a front end extending to the front end of the hood lock member 120.

  With the above configuration, the strength of the front bumper 110 to which the front portion 132 of the absorber 130 and thus the upper portion thereof are attached and the back portion 134 that extends between the hood lock member 120 and bridges them is improved. Is firmly maintained. Therefore, even when a load is applied not only to the front bumper 110 but also to the front hood 102, the rear surface portion 134 is prevented from being deformed, and the absorber 130 based on the vicinity of the parting line between the front bumper 110 and the hood lock member 120 is prevented. It becomes possible to realize a bend.

  Further, in the present embodiment, as shown in FIG. 3A, the lower end of the back surface portion 134 (the lower portion of the absorber 130), that is, the surface of the back surface portion 134 that is to be joined to the hood lock member 120 is formed on the hood lock member 120. It is in surface contact with the top. Thereby, the holding force (resistance force) with respect to the bending moment (rotation moment) can be increased at the joint portion between the absorber 130 and the hood lock member 120. Therefore, it is possible to prevent the absorber 130 from being bent behind the vicinity of the rear end of the design surface 110a of the front bumper 110 due to the rotational moment (load), and to obtain the above-described effects suitably.

  As described above, according to the vehicle front part structure 100 of the present embodiment, the load can be absorbed by both the bending and deformation of the absorber 130, so that a high load absorption effect can be obtained, and a pedestrian can be obtained. It is possible to further reduce the load. In addition, since the front portion 132 of the absorber 130 along the back surface of the design surface 110a of the front bumper 110 can receive the load applied to the front bumper at the normal time by the front portion 132, the sticking of the front bumper 110 due to the load is suppressed. It is also possible to do.

  In the present embodiment, the case where the lower edge of the absorber 130, that is, the lower edge of the vertical rib 136 is curved is illustrated. However, the present invention is not limited to this. The design surface 110a may be bent so as to be positioned near the rear end of the design surface 110a. As shown in FIG. 4, in the embodiment, a plurality of vertical ribs 136 and horizontal ribs 138 are provided on the back surface of the absorber 130 (the lower surface of the front surface portion 132 and the front surface of the back surface portion 134). The load absorption effect can be changed as appropriate.

  Furthermore, in the present embodiment, the configuration in which the lower edge of the vertical rib 136 is curved as described above as the lower edge of the absorber 130 is exemplified, but the present invention is not limited to this. The absorber 130 is not necessarily provided with the vertical rib 136, and even if the vertical rib 136 is not provided, the same effect can be obtained by bending or bending the lower edge of the absorber 130 itself as described above. is there.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention includes a front bumper that constitutes a front surface of a vehicle, a lateral structural member that extends in the vehicle width direction on the rear side of the front bumper, and an absorber that is attached to the upper portion of the lateral structural member over the lateral direction of the vehicle. It can be used for partial structures.

DESCRIPTION OF SYMBOLS 100 ... Vehicle front part structure, 102 ... Front hood, 104 ... Bolt, 106 ... Collider, 110 ... Front bumper, 110a ... Design surface, 120 ... Hood lock member, 130 ... Absorber, 132 ... Front part, 134 ... Back part 136 ... Vertical ribs, 136a ... Area, 138 ... Horizontal ribs

Claims (4)

A front bumper having a design surface that forms a front surface of the vehicle and is inclined so as to rise toward the rear of the vehicle, a lateral structural member that extends in the vehicle width direction on the rear surface side of the front bumper, and a vehicle disposed above the lateral structural member. A vehicle front structure including an absorber attached over the width direction,
The absorber is
A front surface portion extending along the back surface of the design surface of the front bumper;
A rear part extending downward while descending from the rear end of the front part, and a lower part joined to the upper part of the horizontal structural member,
The lower edge of the absorber is curved or bent so as to protrude upward when viewed from the side of the vehicle, and the vertex of the curve or bending is below the rear end of the design surface of the front bumper in the vehicle front-rear direction. Located in
The absorber further includes a vertical rib standing from the lower surface of the front surface portion to the front surface of the rear surface portion,
The lower edge is the lower edge of the longitudinal rib;
The vehicle front portion structure is characterized in that a dimension of the vertical rib in the vehicle height direction is largest below the rear end of the design surface of the front bumper between the front end and the rear end of the design surface of the front bumper. . A front bumper having a design surface that forms a front surface of the vehicle and is inclined so as to rise toward the rear of the vehicle, a lateral structural member that extends in the vehicle width direction on the rear surface side of the front bumper, and a vehicle disposed above the lateral structural member. A vehicle front structure including an absorber attached over the width direction,
The absorber is
A front surface portion extending along the back surface of the design surface of the front bumper;
A rear part extending downward while descending from the rear end of the front part, and a lower part joined to the upper part of the horizontal structural member,
The lower edge of the absorber is curved or bent so as to protrude upward when viewed from the side of the vehicle, and the vertex of the curve or bending is below the rear end of the design surface of the front bumper in the vehicle front-rear direction. Located in
The absorber of the vehicle front structure characterized by further have a transverse rib extending erected vehicle width direction from the lower surface of the front portion below the rear end of the design surface of the front bumper. A front bumper having a design surface that forms a front surface of the vehicle and is inclined so as to rise toward the rear of the vehicle, a lateral structural member that extends in the vehicle width direction on the rear surface side of the front bumper, and a vehicle disposed above the lateral structural member. A vehicle front structure including an absorber attached over the width direction,
The absorber is
A front surface portion extending along the back surface of the design surface of the front bumper;
A rear part extending downward while descending from the rear end of the front part, and a lower part joined to the upper part of the horizontal structural member,
The lower edge of the absorber is curved or bent so as to protrude upward when viewed from the side of the vehicle, and the vertex of the curve or bending is below the rear end of the design surface of the front bumper in the vehicle front-rear direction. Located in
The absorber further includes a vertical rib standing from the lower surface of the front surface portion to the front surface of the rear surface portion,
The lower edge is the lower edge of the longitudinal rib;
The vehicle front structure according to claim 1, wherein the vertical rib includes a region standing from a front surface of the back surface portion and extending to a front end of an upper portion of the horizontal structural member . The vehicle front part structure according to any one of claims 1 to 3 , wherein a lower end of a rear part of the absorber is in surface contact with an upper part of the horizontal structural member.

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