JP2017109629A - Vehicle body front structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body front structure capable of integrating attachment positions of a lower core and an upper core, and relaxing impact applied to a pedestrian.SOLUTION: A vehicle body front structure comprises: a bumper beam which extends between front end parts of a left and right pair of side members along a vehicle width direction; an energy absorption core which is fixed to a front surface of the bumper beam; a lower core which is provided along the energy absorption core on a lower area of the energy absorption core; a lower arm whose lower end is attached to the lower core, and whose upper end is attached to the bumper beam; an upper core which is provided along the energy absorption core on an upper area of the energy absorption core; and upper arms extending from both ends of the bumper beam to both ends of the upper core.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a front structure of a vehicle body.

A front structure of a vehicle body including a bumper beam attached to the front portion of the vehicle body and extending in the vehicle body width direction and a lower bar (lower core) attached below the bumper beam and extending in the vehicle body width direction is known (for example, Patent Document 1). In such a front structure of the vehicle body, the lower bar is fixed by a support member (lower arm) extending downward from one end connected to the bumper beam toward the other end.
In this way, when the pedestrian collides, the shearing force applied to the knee joint portion of the pedestrian can be reduced, so that the pedestrian can be protected.
Also, a radiator core support member is joined and passed to the upper surface of each front end portion of the pair of left and right front side member members, and a bumper beam member is attached to each front end of the pair of left and right front side member members. The front end structure is known (for example, see Patent Document 2). In such a front end structure of the vehicle body, the radiator core support member includes a pair of left and right side support members extending above the vehicle and an upper support member connecting the upper ends of the pair of side support members, and the bumper beam member includes a pair of left and right front sides. An auxiliary member (upper core) is attached to each end of the member member so as to protrude forward of the vehicle, and protrudes forward of the vehicle from the upper support member and extends in the vehicle width direction above the bumper beam member. Is provided.

Japanese Patent Laying-Open No. 2015-123841 JP 2012-116351 A JP 2011-218912 A JP 2006-264495 A

  However, the lower bar (lower core) described in Patent Document 1 is attached to the bumper beam member by a support member, and the auxiliary member (upper core) described in Patent Document 2 is attached to the radiator core support member via a stay. Therefore, when the lower core and the upper core are attached, the attachment positions of the lower core and the upper-core cannot be integrated.

  In view of the above circumstances, at least one embodiment of the present invention consolidates the attachment positions of the lower core and the upper core and can improve the pedestrian protection when colliding with a pedestrian. The purpose is to provide.

  (1) A vehicle body front structure according to at least one embodiment of the present invention includes a pair of left and right side members provided along the vehicle body longitudinal direction, and a front end portion of the pair of left and right side members along the vehicle width direction. A bumper beam stretched over, an energy absorption core fixed to the front surface of the bumper beam and deformed by an impact from the front of the vehicle body, and a lower core provided along the energy absorption core in a lower region of the energy absorption core A lower arm attached to the lower core, an upper end attached to the bumper beam, and a lower arm that deforms between the lower core and the bumper beam when an impact is applied to the lower core from the front of the vehicle body, and the energy An upper core provided along the energy absorption core in an upper region of the absorption core, and the bumper bee From both ends provided toward both ends of the upper core, and a upper arm to deform between the bumper beam and the upper cores when the impact from the vehicle front to the upper cores were added.

  According to the configuration of (1) above, the lower arm is attached to the lower core at the lower end, is attached to the bumper beam at the upper end, and the upper arm is provided from both ends of the bumper beam toward both ends of the upper core. In addition, the mounting position of the upper arm can be concentrated on the bumper beam. Also, when an impact is applied to the lower core from the front of the vehicle body, the lower arm deforms between the lower core and the bumper beam, and when an impact is applied to the upper core from the front of the vehicle body, the upper arm moves between the bumper beam and the upper core. Therefore, it is possible to improve pedestrian protection when the vehicle collides with a pedestrian.

(2) In some embodiments, in the configuration of the above (1), the energy absorbing core, the lower core, the lower arm, the upper core, and the upper arm receive an impact when an impact is applied from the front of the vehicle body. It constitutes a shock absorbing structure to absorb.
According to the configuration of (2) above, since the shock absorbing structure is composed of the energy absorbing core, the lower core, the lower arm, the upper core, and the upper arm, the energy absorbing core, the lower core, and the lower arm when an impact is applied from the front of the vehicle body. The impact can be absorbed by the upper core and the upper arm.

(3) In some embodiments, in the configuration of (1) or (2), the attachment position of the upper end of the lower arm to the bumper beam, the attachment position of the lower end of the upper arm to the bumper beam, and The mounting position of the bumper beam to the side member is collected in the front area of the side member.
According to the configuration of (3) above, the attachment position of the upper end of the lower arm to the bumper beam, the attachment position of the lower end of the upper arm to the bumper beam, and the attachment position of the bumper beam to the side member are defined as the front region of the side member. Therefore, it is possible to improve the assembling property and the repairability (repairability).

(4) In some embodiments, in the configuration of any one of (1) to (3), the bumper beam and the upper arm are fastened together with the front end portion of the side member.
According to the configuration of the above (4), the bumper beam and the upper arm are fastened together with the front end portion of the side member, so that fastening parts (for example, bolts) for attaching the bumper beam and the upper arm to the side member can be reduced. .

(5) In some embodiments, in any one of the configurations (1) to (4), a bumper facial is provided in front of the energy absorbing core, the lower core, and the upper core.
According to the configuration of (5), the appearance from the front of the vehicle body can be improved, and the impact can be reduced by deformation in a light collision.

  According to at least one embodiment of the present invention, the attachment positions of the lower core and the upper core can be integrated, and pedestrian protection can be improved in the event of a collision with a pedestrian.

1 is a perspective view schematically showing a front structure of a vehicle body according to an embodiment of the present invention. It is a disassembled perspective view which shows roughly the front part structure of the vehicle body shown in FIG. It is a front view which shows roughly the front part structure of the vehicle body shown in FIG. FIG. 4 is a cross-sectional view taken along line IV-IV schematically showing the front structure of the vehicle body shown in FIG. 3. FIG. 5 is a cross-sectional view taken along line VV schematically showing the front structure of the vehicle shown in FIG. 3.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. Absent.
For example, expressions expressing relative or absolute arrangements such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial” are strictly In addition to such an arrangement, it is also possible to represent a state of relative displacement with an angle or a distance such that tolerance or the same function can be obtained.
In addition, for example, expressions representing shapes such as quadrangular shapes and cylindrical shapes not only represent shapes such as quadrangular shapes and cylindrical shapes in a strict geometric sense, but also within the range where the same effect can be obtained. A shape including a chamfered portion or the like is also expressed.
On the other hand, the expressions “comprising”, “comprising”, “comprising”, “including”, or “having” one constituent element are not exclusive expressions for excluding the existence of the other constituent elements.

  FIG. 1 is a perspective view schematically showing a front structure 1 of a vehicle body according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view schematically showing the front structure 1 of the vehicle body shown in FIG. It is. 3 is a front view schematically showing the front structure 1 of the vehicle body shown in FIG. 1, and FIG. 4 is an IV-IV schematically showing the front structure 1 of the vehicle body shown in FIG. It is line sectional drawing. FIG. 5 is a cross-sectional view taken along line VV schematically showing the vehicle front structure 1 shown in FIG.

  As shown in FIG. 1, a vehicle body front structure 1 according to an embodiment of the present invention includes a pair of side members 2, a bumper beam 3 spanned between the pair of side members 2, and the front surface of the bumper beam 3. And an energy absorption core 4 (hereinafter referred to as “E / A core 4”).

  The pair of side members 2 are strength parts (vehicle body parts) that receive an impact load due to a frontal collision and absorb the impact load by being crushed and deformed, and are provided along the longitudinal direction of the vehicle body. The side member 2 is configured by combining a groove-shaped component having an opening on the outer side in the vehicle width direction and a plate-shaped component that closes the opening. The groove-type component is formed by press-molding a steel plate, for example, and has a flange extending outward from the opening (the vehicle body upper side and the vehicle body lower side). The plate-like component is formed by press-molding a steel plate, for example, and has a plurality of beads provided along the vertical direction of the vehicle body. The flanges of these groove-shaped parts and the edge parts of the plate-like parts are joined together by welding or the like to constitute the side member 2 (assembly).

  As shown in FIG. 2, the side member 2 has a mounting plate portion 23 at the front end thereof. The mounting plate portion 23 is for mounting an upper arm 8 to be described later and the bumper beam 3 described above, and is sufficient to block a front opening provided by combining a groove-shaped component and a plate-shaped component. It has a size. The mounting plate portion 23 is formed in a box shape whose rear side in the longitudinal direction of the vehicle body is opened, and an assembly in which a groove-shaped component and a plate-shaped component are welded is fitted therein. Further, the mounting plate portion 23 is joined to the assembly in which the groove-shaped component and the plate-shaped component are welded together by welding or the like to constitute the side member 2.

  Further, the side member 2 has a screw hole 23a for attaching the later-described upper arm 8 and the above-described bumper beam 3 to the front surface of the attachment plate portion 23 which is the front end thereof. Furthermore, the side member 2 has a screw hole 23b for attaching the upper arm 8 to the outer side surface of the attachment plate portion 23 that is the side surface of the front end portion.

  The bumper beam 3 is a strength component (vehicle body component) that is installed inside the bumper facial 9 in order to reduce damage to the vehicle body during a low-speed collision, and is provided along the vehicle width direction. The bumper beam 3 is composed of groove-shaped parts that alternately protrude in the longitudinal direction of the vehicle body. The groove-type component is formed by press-molding a steel plate, and has flanges that extend outwardly from both sides of the vehicle body in the front-rear direction of the vehicle body (upper side of the vehicle body and lower side of the vehicle body). The bumper beam 3 has through holes 30a for attaching the bumper beam 3 to the side member 2 (attachment plate portion 23) at both ends thereof. As a result, the bolt B passes through the through hole 30 a of the bumper beam 3 and is screwed into the screw hole 24 a provided in the mounting plate portion 23 of the side member 2, so that the bumper beam 3 is attached to the side member 2. The bumper beam 3 has screw holes (not shown) for attaching a lower arm 6 (described later) to the bumper beam 3 on both sides thereof.

  The E / A core 4 is an impact mitigating component for protecting the pedestrian, and is provided along the vehicle width direction at a position equivalent to the knee height of the pedestrian in the vehicle body height direction. The E / A core 4 is a groove-shaped part having a trapezoidal cross section with an opening on the rear side in the longitudinal direction of the vehicle body, and includes a front plate portion 4A, an upper inclined plate portion 4B, a lower inclined plate portion 4C, and an upper horizontal plate. It has a portion 4D and a lower horizontal plate portion 4E. The groove-shaped part having a trapezoidal cross section is formed, for example, by press-molding a steel plate that is thinner than the steel plate constituting the bumper beam 3 described above, and has a flange that extends outward from the opening (the vehicle body upper side and the vehicle body lower side). ing. The flange of the E / A core 4 and the flange of the bumper beam 3 are joined by welding or the like, and the E / A core 4 and the bumper beam 3 are integrated.

  The E / A core 4 has an opening 4a (through which a tool (not shown) for tightening a bolt B for attaching the bumper beam 3 integrated with the E / A core 4 to the side member 2 is inserted at both ends. It has a clearance hole. Thereby, a tool can be inserted into the opening 4 a and the bolt B for attaching the bumper beam 3 to the side member 2 can be tightened.

  As shown in FIG. 3, the vehicle body front structure 1 according to the present embodiment further includes a lower core 5 provided along the E / A core 4 in a lower region of the E / A core 4. The lower core 5 supports a pedestrian's lower knee when the vehicle collides with a pedestrian, and is provided along the vehicle width direction at a position below the pedestrian's knee in the vehicle body height direction. The lower core 5 is composed of a tubular part. The annular component is made of, for example, a steel pipe.

  The vehicle body front structure 1 according to the present embodiment further includes a lower arm 6 for attaching the lower core 5 to the bumper beam 3. One end of the lower arm 6 is attached to the lower core 5 and the other end is attached to the bumper beam 3. The lower arm 6 is disposed between the lower core 5 and the bumper beam 3 when an impact is applied to the lower core 5 from the front of the vehicle body. Deform.

  As shown in FIG. 4, the lower arm 6 is configured by, for example, pressing a strip-shaped steel plate, a lower core 5 is joined to one end by welding or the like, and a lower arm 6 is attached to the other end to attach the lower arm 6 to the bumper beam 3. It has a hole (not shown). As a result, the bolt B passes through the through hole of the lower arm 6 from the rear in the longitudinal direction of the vehicle body and is screwed into the screw hole provided in the bumper beam 3, so that the lower arm 6 is attached to the rear surface of the bumper beam 3.

  As shown in FIG. 5, the vehicle body front structure 1 according to the present embodiment further includes an upper core 7 provided along the E / A core 4 in an upper region of the E / A core 4. The upper core 7 supports the pedestrian's upper part of the pedestrian when the vehicle collides with the pedestrian, and is provided along the vehicle width direction at a position above the pedestrian's knee in the vehicle body height direction. Yes. The upper core 7 is a groove-shaped component that opens at the lower side in the vehicle body height direction. The upper core 7 includes an upper surface plate portion 7A, a front surface plate portion 7B, and a rear surface plate portion 7C, and outward from the opening (vehicle body front side and vehicle body rear side). Has an extending flange.

  Further, the upper core 7 has through holes (not shown) for attaching upper arms 8 to be described later at both ends thereof. The through holes are provided in, for example, the top plate portion 7A and the front plate portion 7B.

  The vehicle body front structure 1 according to the present embodiment further includes an upper arm 8 for attaching the upper core 7 to the bumper beam 3. The upper arm 8 is provided from both ends of the bumper beam 3 toward both ends of the upper core 7. The upper arm 8 is formed between the bumper beam 3 and the upper core 7 when an impact is applied to the upper core 7 from the front of the vehicle body. Transform between. The lower arm 6 is configured by, for example, pressing a steel plate into an L-shaped cross section, and one end is attached to the end of the bumper beam 3 and the other end is attached to the end of the upper core 7.

  As shown in FIG. 2, the upper arm 8 has through holes 80 a and 80 b for attaching the upper arm 8 to the side member 2 at the end on the side member 2 side. The through-hole 80a is provided in the front surface and side surface of the edge part used as the side member 2 side. As a result, the bolt B penetrates the through hole 80b provided in the side surface of the upper arm 8 from the side in the vehicle width direction, and the screw hole 23b provided in the outer side surface of the mounting plate portion 23 serving as the front end side surface of the side member 2. Only the upper arm 8 can be attached to the side member 2. Further, from the front in the front-rear direction of the vehicle body, the bolt B passes through a through hole provided in the bumper beam 3 and a through hole 80a provided in the front surface of the upper arm 8, and the mounting plate portion 23 serving as the front surface of the front end of the side member 2 Both the bumper beam 3 and the upper arm 8 can be simultaneously attached to the side member 2 by being screwed into the screw holes 23a provided on the front surface. That is, the bumper beam 3 and the upper arm 8 are fastened together with a mounting plate portion 23 (front end portion of the side member 2) that is the front surface of the front end of the side member 2, whereby both the bumper beam 3 and the upper arm 8 are connected to the side member. 2 can be attached simultaneously. Thereby, the fastening components (for example, volt | bolt) for attaching the bumper beam 3 and the upper arm 8 to the side member 2 can be decreased.

  Further, the upper arm 8 has a screw hole (not shown) for attaching the upper core 7 to the upper arm 8 at an end on the upper core 7 side. The screw holes are provided on the front surface and the upper surface of the end portion on the upper core 7 side. Thereby, a bolt (not shown) penetrates a through hole provided in the upper surface plate portion of the upper core 7 from above in the vehicle body vertical direction and is screwed into a screw hole provided on the upper surface of the upper arm 8. The upper core 7 is attached to the upper arm 8. Further, a bolt (not shown) from the front in the front-rear direction of the vehicle body passes through a through-hole provided in the front plate portion of the upper core 7 and is screwed into a screw hole provided in the front surface of the upper arm 8. The core 7 is attached to the upper arm 8.

The E / A core 4, the lower core 5, the lower arm 6, the upper core 7 and the upper arm 8 described above constitute an impact absorbing structure that absorbs an impact when an impact is applied from the front of the vehicle body.
Thereby, when an impact is applied from the front of the vehicle body, the E / A core 4, the lower core 5, the lower arm 6, the upper core 7 and the upper arm 8 can absorb the impact.

Further, as shown in FIG. 3, the mounting position of the upper end of the lower arm 6 to the bumper beam 3, the mounting position of the lower end of the upper arm 8 to the bumper beam 3, and the mounting position of the bumper beam 3 to the side member 2 are as follows. , It is collected in the front area (area A) of the side member 2.
Thereby, the improvement of assembly | attachment property and repair property (repairability) can be aimed at.

  As shown in FIGS. 4 and 5, the vehicle body front structure 1 according to the present embodiment further includes a bumper facial 9. The bumper facial 9 enables a vehicle design having a sense of unity with the body, and is made of a synthetic resin or the like. Further, the bumper facial 9 has such a rigidity that the impact can be reduced by deformation in a light collision.

  As described above, according to the vehicle body front structure 1 according to the embodiment of the present invention, the lower arm 6 is attached to the bumper beam 3 at the lower end, is attached to the lower core 5, and the upper arm 8 is Since the bumper beam 3 is provided from both ends of the bumper beam 3 toward both ends of the upper core 7, the mounting positions of the lower arm 6 and the upper arm 8 can be concentrated on the bumper beam 3. Further, when an impact is applied to the lower core 5 from the front of the vehicle body, the lower arm 6 is deformed between the bumper beam 3 and the lower arm 6, and when an impact is applied to the upper core 7 from the front of the vehicle body, the bumper beam 3 and the upper Since it deform | transforms between the cores 7, the improvement of pedestrian protection at the time of colliding with a pedestrian can be aimed at.

  In addition, since the bumper facial 9 is provided in front of the E / A core 4, the lower core 5, and the upper core 7, a vehicle design with a sense of unity with the body (not shown) can be achieved. The impact can be mitigated by deformation.

  The present invention is not limited to the above-described embodiments, and includes forms obtained by modifying the above-described embodiments and forms obtained by appropriately combining these forms.

DESCRIPTION OF SYMBOLS 1 Front part structure 2 Side member 23 Mounting plate part 24a, 24b Screw hole 3 Bumper beam 30b Screw hole 4 Energy absorption core (E / A core)
4A Front plate portion 4B Upper inclined plate portion 4C Lower inclined plate portion 4D Upper horizontal plate portion 4E Lower horizontal plate portion 4a Opening 5 Lower core 6 Lower arm 7 Upper core 8 Upper arm 9 Bumper facial 30a Through hole B Bolt

Claims (5)

A pair of left and right side members provided along the longitudinal direction of the vehicle body;
A bumper beam spanned along the vehicle width direction at the front ends of the pair of left and right side members;
An energy absorbing core fixed to the front surface of the bumper beam and deformed by an impact from the front of the vehicle body;
A lower core provided along the energy absorbing core in a lower region of the energy absorbing core;
A lower arm is attached to the lower core, an upper end is attached to the bumper beam, and a lower arm that deforms between the lower core and the bumper beam when an impact is applied to the lower core from the front of the vehicle body,
An upper core provided along the energy absorbing core in an upper region of the energy absorbing core;
An upper arm provided from both ends of the bumper beam toward both ends of the upper core, and deformed between the bumper beam and the upper core when an impact is applied to the upper core from the front of the vehicle body. The front part structure of the car body.   The energy absorbing core, the lower core, the lower arm, the upper core, and the upper arm constitute an impact absorbing structure that absorbs an impact when an impact is applied from the front of the vehicle body. Front structure of the car body.   The mounting position of the upper end of the lower arm to the bumper beam, the mounting position of the lower end of the upper arm to the bumper beam, and the mounting position of the bumper beam to the side member are collected in the front region of the side member. The front part structure of a vehicle body according to claim 1 or 2.   The vehicle body front structure according to any one of claims 1 to 3, wherein the bumper beam and the upper arm are fastened together with a front end portion of the side member.   The front structure of a vehicle body according to any one of claims 1 to 4, further comprising a bumper facial in front of the energy absorbing core, the lower core, and the upper core.

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