JP2004256075A - Body front part structure of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a body front part structure of an automobile capable of easily controlling crush of a side member while improving the safety of a pedestrian at collision of the automobile with the pedestrian. <P>SOLUTION: First and second support members 7a and 7b extending to the obliquely upward direction on the vehicle rear side are provided on both ends of a protrusion member 7. The first and the second support members 7a and 7b are fastened by a bumper armature 4 and bumper stays 3a and 3b, and are fixed on plate shaped first and second pendent members 5a and 5b extending to the vehicle downward side. A third support member 7c extending to the vehicle rear side is provided on a center part of the protrusion member 7. The third support member 7c is fixed on a center part of the bumper armature 4, and is fixed on a plate shaped third pendent member 6 extending to the vehicle downward side. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body front structure for preventing a pedestrian from getting caught below a knee below a vehicle when the vehicle collides with a pedestrian.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, when a vehicle collides with a pedestrian, a body front structure of the vehicle has been known which mainly suppresses a bending angle and a shearing displacement of a knee portion to reduce a degree of damage below the knee to the pedestrian ( Patent Document 1).
[0003]
According to the present invention, a protruding member is provided below the bumper armature to protrude forward of the vehicle, and when the vehicle and the pedestrian collide, the protruding member applies a reaction force to the outside of the vehicle below the pedestrian's knee to allow the pedestrian to walk. By reducing the amount of foot injury, pedestrians receive less knee damage.
[0004]
[Patent Document 1]
JP-A-2001-088634 (Pages 1-3, FIG. 1)
[0005]
[Problems to be solved by the invention]
However, in the conventional invention, the mounting portion (bracket) of the protruding member is directly fixed to the front end of the side member of the vehicle. As a result, the front end of the side member is reinforced, and the vehicle can be driven at medium to high speeds. There is a problem that it is difficult to control the crush of the side members when colliding with an obstacle.
[0006]
In addition, even when the vehicle is slightly impacted, the impact force may be transmitted directly from the side members to the vehicle body, which may result in an increase in repair costs.
[0007]
The present invention has been made in view of the above problems, and an object of the present invention is to improve the safety of a pedestrian at the time of a collision between a car and a pedestrian and easily control the collapse of the side member. An object of the present invention is to provide a vehicle body front structure.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, a bumper armature extending in the vehicle width direction and fixed to front end portions of left and right side members via bumper stays, and a bumper armature extending in the vehicle width direction and extending in the vehicle width direction. In a vehicle body front structure provided with a projecting member projecting forward of the vehicle below the vehicle, a first support member extending obliquely upward on the vehicle rear side is provided at one end of the projecting member, and (1) The support member is fixed to a plate-shaped first hanging member which is sandwiched between a bumper armature and a bump pasty and extends downward from the vehicle, and extends obliquely upward from the other end of the protruding member to the vehicle rear side. And a second support member fixed to a plate-shaped second hanging member that is sandwiched between the bumper armature and the bump pasty and that extends downward from the vehicle. Department Provided with a third supporting member for extending toward the rear of the vehicle, characterized in that to fix the third support member to the vehicle body side member.
[0009]
According to a second aspect of the present invention, in the vehicle body front structure according to the first aspect, the projecting member, the first supporting member, the second supporting member, and the third supporting member are integrally formed of resin. I do.
[0010]
According to a third aspect of the present invention, in the vehicle body front structure according to the first or second aspect, the projecting member, the first support member, the second support member, and the third support member are opened to the upper side of the vehicle. And a plurality of ribs formed inside the U-shape.
[0011]
According to a fourth aspect of the present invention, in the vehicle body front structure according to any one of the first to third aspects, the third support member is fixed to a central portion of a bumper armature and is directed downward from the vehicle. [0012] The liquid crystal display device is fixed to an extended plate-shaped third hanging member.
According to a fifth aspect of the present invention, in the vehicle body front structure according to any one of the first to third aspects, the third support member is fixed to a radiator core lower of the radiator core support.
[0013]
In the invention according to claim 6, in the vehicle body front structure according to any one of claims 1 to 5, a bracket portion is formed on at least one of the first to third hanging members, and the bracket portion is formed. It is characterized by being fixed to bumper fascia.
[0014]
Function and effect of the present invention
According to the first aspect of the present invention, the plate-shaped first hanging member and the second hanging member are fixed in a state of being sandwiched between both ends of the corresponding bump pasty and bumper artery, respectively, and the third hanging member is provided with the third hanging member. It is fixed to the center of the bumper armature.
[0015]
A first support member is provided at one end of the protruding member and extends obliquely upward on the vehicle rear side, and the first support member is fixed to the first hanging member.
[0016]
On the other hand, a second support member is provided at the other end of the projecting member and extends obliquely upward on the vehicle rear side, and the second support member is fixed to the second hanging member.
[0017]
Further, a third support member extending to the vehicle rear side is provided at the center of the protruding member, and the third support member is fixed to the vehicle body-side member.
[0018]
Therefore, when the vehicle and the pedestrian collide, the lower part of the pedestrian hits the projecting member and tilts the lower part toward the vehicle, and then the bumper armature hits the lower part of the tilted knee. Thus, it is possible to prevent the pedestrian from getting caught below the knee below the vehicle by applying a reaction force to rotate the vehicle.
[0019]
Further, as compared with the conventional invention, the impact force when the automobile and the pedestrian collide is mainly absorbed by the first to third support members, so that there is almost no influence on the side members and the repair cost increases. Nothing.
[0020]
Further, since the first support member and the second support member are respectively fixed to the first hanging member and the second hanging member sandwiched between the bump pasty and the bumper armature, the projecting member is fixed to the side member as in the conventional invention. As compared with the case where the side members are crushed, the crush control of the side members becomes easier.
[0021]
Further, the protruding member includes a first support member and a second support member extending obliquely upward on the vehicle rear side corresponding to a hanging member, and a third support member extending rearward on the vehicle corresponds to a vehicle body side member. Since each is fixed, it is fixed at three points of an inverted triangle having the third support member as a vertex, and the protruding member can be fixed stably.
[0022]
In addition, since the third support member is fixed to the vehicle body-side member, the rigidity in the front-rear direction at the central portion of the protruding member can be enhanced, and the vehicle can be stably deformed when it hits a pedestrian. The same effect can be expected when a pedestrian collides from any direction.
[0023]
According to the second aspect of the present invention, since the protruding member and the first to third support members are integrally formed of resin, the number of parts can be reduced to reduce cost, and the elastic force of the resin can be used in the event of an automobile collision. The impact force of the pedestrian can be absorbed to improve protection of the pedestrian below the knee.
[0024]
According to the third aspect of the present invention, the protruding member and the first to third support members are formed in a U-shaped cross-sectional shape opened to the upper side of the vehicle, and a plurality of ribs are formed inside the U-shape. In addition, the overall rigidity of the protruding member and the first to third support members can be strengthened, and the impact force at the time of the collision can be efficiently absorbed by the rib at the time of the collision of the vehicle.
[0025]
According to the fourth aspect of the present invention, since the third supporting member of the projecting member is fixed to the center of the bumper armature by the third hanging member, when the vehicle collides with a pedestrian, these projecting members and the bumper armature are used. Move together to the rear side of the vehicle to be able to absorb the impact force at the time of the collision.
[0026]
According to the fifth aspect of the present invention, since the third support member is fixed to the radiator core lower of the radiator core support, the number of parts can be reduced to reduce the cost, and the rigidity in the front-rear direction at the center of the protruding member can be reduced. Strengthening can be achieved.
[0027]
According to the invention as set forth in claim 6, a bracket portion is formed on at least one of the first to third hanging members, and the bracket portion is fixed to the bumper fascia. It can be dispersed in one to three hanging members.
[0028]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the vehicle body front structure according to the present invention will be described below.
<Embodiment 1>
Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings.
[0029]
FIG. 1 is an exploded perspective view showing a vehicle body front structure of an automobile according to Embodiment 1 of the present invention, FIG. 2 is a perspective view of a first hanging member of this embodiment, and FIG. 3 is an automobile body of this embodiment. FIG. 4 is a perspective view of a third hanging member, and FIG. 5 is a central end view illustrating a vehicle body front structure of a vehicle.
[0030]
As shown in FIG. 1, a vehicle body front structure A according to the present embodiment includes a radiator core support 1 and side members 2a, 2b arranged on left and right radiator core sides 1a, 1a of the radiator core support 1. Bumpers 3a, 3b fixed to the front ends of both side members 2a, 2b, respectively, and a first hanging member 5a and a second hanging member 5b sandwiched between both ends of these bumpers 3a, 3b and bumper armature 4. A third hanging member 6 fixed to the center rear surface of the bumper armature 4, a projecting member 7 fixed below the first to third hanging members, and an impact fixed to the front surface of the bumper armature 5. The absorption member 8 has a main configuration.
[0031]
9 indicates a radiator grill and 10 indicates a bumper fascia.
[0032]
As shown in FIGS. 1 to 3, the first hanging member 5a has a U-shaped cross-sectional shape in which a metal plate is opened rearward and extends downward, and the upper side has a bumper stay 3a and a bumper armature 4 on the upper side. The three members are fixed together at four bolt fastening portions B1 in a state of being sandwiched between them.
[0033]
The lower side of the first hanging member 5a is bent forward from an intermediate portion to form a bent portion 5c. Further, below the bent portion 5c, a first support member 7a of a projecting member 7 described later is formed. It is fixed at two bolted portions B2.
[0034]
Also, the second hanging member 5b is formed with a bent portion 5d that bends from the middle part forward like the first hanging member 5a, and the upper part is sandwiched between the bump pasty 3b and the bumper armature 4. Are fixed together, and the lower side is fixed to a second support member 7b of a projecting member 7 described later.
[0035]
As shown in FIGS. 4 and 5, the third hanging member 6 has a U-shaped cross-sectional shape in which a metal plate is opened rearward and extends downward, and the upper side is provided at two locations on the bumper armature 4. At the bolt fastening portion B3.
[0036]
Further, the lower side of the third hanging member 6 is fixed to a third supporting member 7c of a projecting member 7 described later by one bolt fastening portion B4.
[0037]
The protruding member 7 extends in the vehicle width direction, and a first support member 7a extending obliquely upward on the rear side is provided at one end, and a rear end surface of the first support member 7a is the first hanging member. It is fixed to the member 5a.
[0038]
On the other hand, a second support member 7b is provided at the other end of the protruding member 7 and extends obliquely upward on the rear side. A rear end surface of the second support member 7b is fixed to the second hanging member 5b. I have.
[0039]
A third support member 7c extending rearward is provided at the center of the protruding member 7, and a rear end surface of the third support member 7c is fixed to the third hanging member 6.
[0040]
The protruding member 7 and the first to third support members 7a to 7c are integrally formed of glass fiber reinforced resin, and have a U-shaped cross-sectional shape opened upward, and A plurality of ribs 7g are formed inside to enhance the rigidity of the protruding member 7 and the first to third support members 7a to 7c.
[0041]
Further, the protruding member 7 is formed in a cross-sectional shape in which the rigidity in the front-back direction increases from both ends to the center.
[0042]
A shock absorbing member 8 is provided on the front surface of the bumper armature 4, and a radiator grill 9 and a bumper fascia are provided so as to cover the shock absorbing member 8 and the projecting member 7 from the front.
[0043]
Hereinafter, the operation of the vehicle body front structure according to the present embodiment will be described.
[0044]
The impact force when the automobile and the pedestrian collide is first transmitted from the protruding member 7 to the first to third support members 7a to 7c, and then transmitted to the respective hanging members 5a, 5b, 6.
[0045]
At this time, the projecting member 7, the first to third support members 7a to 7c are elastically deformed together with the rib 7g provided therein, thereby absorbing the impact force at the time of collision and the first and second hanging members 5a, 5b. Are also absorbed by the bent portions 5c and 5d.
[0046]
Further, the projecting member 7 transmits the impact force to the bumper armature 4 via the third hanging member 6 to reduce the impact force.
[0047]
Then, the pedestrian's knees are tilted toward the vehicle, and the projecting member 7 applies a reaction force to the pedestrian's knees so as to rotate outward from the vehicle to prevent the pedestrians from getting caught below the pedestrian's knees. Can be done.
[0048]
Therefore, in the vehicle body front structure A of the present embodiment, the first support member 7a and the second support member 7b have the first hanging member 5a sandwiched between the bump pasties 3a and 3b and the bumper armature 4 and Since each of the side members 2a and 2b is fixed to the second hanging member 5b, the crushing of the side members 2a and 2b can be easily controlled as compared with the case where the projecting member is fixed to the side member as in the conventional invention.
[0049]
Further, since the protruding member 7 is fixed to the corresponding hanging members 5a, 5b, 6 by the first to third supporting members 7a to 7c, it is fixed at three points of an inverted triangle having the third supporting member 7c as a vertex. As a result, stable fixing and shock absorbing ability of the projecting member 7 can be realized.
[0050]
In addition, since only the plate-shaped first hanging member 5a and the second hanging member 5b are interposed in the bump pasties 3a and 3b and the bumper armature 4, respectively, the amount of crushing deformation of the side members 2a and 2b is almost limited. It does not affect.
[0051]
<Embodiment 2>
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.
[0052]
FIG. 6 is an exploded perspective view showing the vehicle body front structure of the vehicle according to the second embodiment of the present invention, and FIG. 7 is a central end view for explaining the vehicle body front structure of the vehicle of the present embodiment.
[0053]
The vehicle body front structure B of the present embodiment is the same as that of the first embodiment except that the third hanging member 6 described in the first embodiment is omitted and the shape of the third support member 7c is changed. Therefore, the same reference numerals are given to the same members, and the description thereof will be omitted.
[0054]
As shown in FIGS. 6 and 7, the vehicle body front structure B of the present embodiment has a U-shaped cross-sectional shape opened upward at the center of the protruding member 7 and extends rearward. A third support member 21 is provided.
[0055]
The distal end 21a of the third support member 21 is fixed to the radiator core lower 1b of the radiator core support 1 by a locking pin P, and the strength of the protruding member 7 in the front-rear direction increases from both ends to the center. It is formed as follows.
[0056]
Hereinafter, the operation of the vehicle body front structure according to the present embodiment will be described.
[0057]
The impact force when a car and a pedestrian collide is transmitted first from the projecting member 7 to the first and second support members 7a, 7b, and then, via the hanging members 5a, 5b, the order of the bumper stay 3a and the side member 2a. Is transmitted to and absorbed.
[0058]
At this time, as described above, since the rigidity of the protruding member 7 in the front-rear direction of the protruding member 7 is enhanced by the third support member 21, the collision position between the automobile and the pedestrian is any position. The load received in the front-rear direction at the time of the collision can be made substantially constant, and the desired shock absorbing ability can be stably exhibited.
[0059]
Then, the projecting member 7 applies a reaction force to the vehicle below the pedestrian's knee so as to rotate to the outside of the vehicle, so that the protrusion below the vehicle below the knee of the pedestrian can be prevented.
[0060]
Accordingly, in the vehicle body front structure B of the present embodiment, the first support member 7a and the second support member 7b are fixed to the first hanging member 5a and the second hanging member 5b, respectively. As compared with the case where the protruding member is fixed to the side member as described above, the collapse of the side members 2a and 2b can be easily controlled.
[0061]
In addition, regardless of the collision position between the car and the pedestrian, the protruding member 7 makes it possible to exhibit a substantially constant load received in the front-rear direction at the time of the collision and exhibit a stable shock absorbing ability, thereby improving the protection performance of the pedestrian. There is an effect that it can be improved.
[0062]
Furthermore, by omitting the third hanging member, it is possible to improve the ventilation to the heat exchanger disposed rearward.
[0063]
<Embodiment 3>
Hereinafter, Embodiment 3 of the present invention will be described with reference to the drawings.
[0064]
FIG. 8 is a perspective view of the first hanging member, and FIG. 9 is a side end view for explaining a vehicle body front structure of the automobile according to the present embodiment.
[0065]
The vehicle body front structure C of the present embodiment is the same as that of the first embodiment except that a bracket portion for fixing a bumper fascia to the first and second hanging members described in the first embodiment is formed. Therefore, the same members are denoted by the same reference numerals and description thereof will be omitted.
[0066]
In the vehicle body front structure C of the present embodiment, as shown in FIGS. 8 and 9, bracket portions K1 and K2 protruding forward are formed at the upper end and the lower end of the first hanging member 5a, respectively. The bumper fascia 10 is fixed at bolt fastening portions B7, B8 provided on the bracket portions K1, K2.
[0067]
Since the second hanging member 5b has a symmetrical shape with respect to the first hanging member 5a, the description thereof is omitted.
[0068]
Hereinafter, the operation of the vehicle body front structure according to the present embodiment will be described.
[0069]
The impact force when a car and a pedestrian collide is first transmitted from the protruding member 7 to the first to third support members 7a to 7c, and then the bump pasty 3a and the side member 2a are sequentially passed through the hanging members 5a and 5b. Is transmitted to and absorbed.
[0070]
At this time, as described above, since the bumper fascia 5 is fixed to the bracket portions K1 and K2 of the hanging members 5a and 5b, the impact force received by the bumper fascia 10 at the time of the collision is transmitted through the brackets K1 and K2. The first and second hanging members 5a and 5b can be dispersed.
[0071]
Then, the pedestrian's knees are tilted toward the vehicle, and the projecting member 7 applies a reaction force to the pedestrian's knees so as to rotate outward from the vehicle to prevent the pedestrians from getting caught below the pedestrian's knees. Can be done.
[0072]
Therefore, in the vehicle body front structure C of the present embodiment, the first support member 7a and the second support member 7b are fixed to the first hanging member 5a and the second hanging member 5b, respectively. Compared to the case where the protruding member is fixed to the side member as in the invention of the third aspect, the collapse of the side members 2a and 2b can be easily controlled, and the impact force received by the bumper fascia 5 at the time of collision can be controlled via the bracket portions K1 and K2. Thus, the first and second hanging members 5a and 5b can be dispersed.
[0073]
The embodiment of the present invention has been described above. However, the specific configuration of the present invention is not limited to the present embodiment, and the present invention is applicable even if there is a design change without departing from the gist of the invention. include.
[0074]
For example, the shape, the number of installations, and the installation positions of the ribs described in the present embodiment can be set as appropriate.
[0075]
In the present embodiment, the first and second hanging members 5a and 5b are provided with the bracket portions K1 and K2. However, the third hanging member 6 is provided with the bracket portions K1 and K2 and the bumper fascia is fixed. Is also good.
[0076]
Further, a resin clip that breaks the locking pin P by a predetermined shearing load may be used.
[0077]
Further, the hanging member described in the present embodiment may be substituted for the closing plate of the bumper stay.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a vehicle body front structure of an automobile according to a first embodiment.
FIG. 2 is a perspective view of a first hanging member of the embodiment.
FIG. 3 is a side end view for explaining a vehicle body front structure of the vehicle according to the present embodiment.
FIG. 4 is a perspective view of a third hanging member of the present embodiment.
FIG. 5 is a central end view for explaining a vehicle body front structure of the vehicle according to the present embodiment.
FIG. 6 is an exploded perspective view showing a vehicle body front structure of the vehicle according to the second embodiment.
FIG. 7 is a central end view for explaining a vehicle body front structure of the vehicle according to the present embodiment.
FIG. 8 is a perspective view of a first hanging member according to the third embodiment.
FIG. 9 is a side end view for explaining a vehicle body front structure of the vehicle according to the present embodiment.
[Explanation of symbols]
P Locking pin 1 Radiator core support 1a Radiator core side 1b Radiator core lower 2a, 2b Side member 3a, 3b Bump pasty 4 Bumper armature 5a First hanging member 5b Second hanging member 5c, 5d Bending portion 6 Third hanging member 7 Projection Member 7a First support member 7b Second support member 7c Third support member 7g Rib 8 Shock absorbing member 9 Radiator grill 10 Bumper fascia 21 Third support member 21a Tip

Claims (6)

A bumper armature extending in the vehicle width direction and fixed to front end portions of left and right side members via bumper stays;
In a vehicle body front structure provided with a projecting member extending in a vehicle width direction and projecting forward of the vehicle below the bumper armature,
A first support member is provided at one end of the protruding member and extends obliquely upward on the vehicle rear side, and the first support member is sandwiched between a bumper armature and a bump pasty, and extends downwardly of the vehicle. Fixed to the first hanging member in the shape of
A second support member is provided at the other end of the protruding member to extend obliquely upward on the vehicle rear side, and the second support member is sandwiched between a bumper armature and a bump pasty, and extends downward on the vehicle. Fixed to a plate-shaped second hanging member,
A vehicle body front structure, wherein a third support member extending to the vehicle rear side is provided at a central portion of the projecting member, and the third support member is fixed to a vehicle body side member. The vehicle body front structure according to claim 1,
A vehicle body front structure in which the projecting member, the first supporting member, the second supporting member, and the third supporting member are integrally formed of resin. The vehicle body front structure according to claim 1 or 2,
The projecting member, the first supporting member, the second supporting member, and the third supporting member are formed in a U-shaped cross-sectional shape opened to the upper side of the vehicle, and a plurality of ribs are formed inside the U-shaped. Features a vehicle body front structure. The vehicle body front structure according to any one of claims 1 to 3, wherein the third support member is fixed to a central portion of a bumper armature, and has a plate-like shape extending downward from the vehicle. 3. A vehicle body front structure fixed to a hanging member. The vehicle body front structure according to any one of claims 1 to 3,
A vehicle body front structure wherein the third support member is fixed to a radiator core lower of a radiator core support. The vehicle body front structure according to any one of claims 1 to 5,
A vehicle body front structure, wherein a bracket portion is formed on at least one of the first to third hanging members, and the bracket portion is fixed to a bumper fascia.

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