JP4106935B2 - Front body structure of automobile - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a front body structure of an automobile, and more particularly to a connecting member structure of a radiator shroud panel disposed at a rear portion of a bumper fascia.
[0002]
[Prior art]
In recent years, in order to simplify the front part of the vehicle and improve the rigidity of the suspension in some passenger cars, the cross member that connects the front side frame of the automobile has not been laid out at the front end of the front side frame, and is arranged near the suspension tower. What is installed is known (Japanese Utility Model Laid-Open No. 2-113580).
[0003]
In the vehicle having such a structure, since the cross member is not disposed in the vicinity of the back of the bumper fascia, the lower part of the bumper fascia disposed in front of the bumper reinforcement cannot be supported by the cross member. As a result, the supporting force of the bumper fascia is reduced, and the drooping phenomenon due to the weight of the bumper fascia is likely to occur.
[0004]
The upper end portion of the bumper fascia is supported by an upper structure such as a shroud, and a parting line having a predetermined gap is formed between the upper end edge of the bumper fascia and the lower end edge of the bonnet. When the self-weight droop occurs, the gap is widened or is not a constant gap in the vehicle width direction, which causes a problem that the appearance of the front portion of the vehicle is extremely deteriorated.
[0005]
In order to solve such a problem, a foam member for shock absorption disposed on the front surface of the bumper reinforcement is extended to the back surface of the bumper fascia, and the foam member attempts to prevent the bumper fascia from drooping. However, since the foam member is basically low in rigidity, the foam member itself is also deformed by the load from the upper surface of the bumper fascia, so that a support member having higher rigidity is required.
[0006]
[Problems to be solved by the invention]
Therefore, the present invention suppresses the deterioration of the appearance quality for a long time by the bumper fascia hanging downward due to the load from the upper side of the bumper fascia or by its own weight, and the appearance quality is reduced. It is an issue to realize with a simple structure.
[0007]
[Means for Solving the Problems]
In the front body structure of the vehicle according to the first configuration of the present invention, a bumper fascia is disposed in the front part of the vehicle, and a parting line is formed by an upper end edge of the bumper fascia and a lower end edge of the bonnet. In a vehicle front body structure in which a radiator shroud panel extending in the vehicle width direction and a shroud door upper panel extending in the vehicle width direction are disposed on the upper portion of the radiator shroud panel, the shroud door upper panel faces forward. Overhanging extension portions are provided above the front end portions of the pair of left and right front side frames extending in the vehicle front-rear direction, the extension portions, the reinforcing members for supporting the extension portions, and the front portions are the above The rear part of the retainer formed so as to be along the rear surface of the upper part of the bumper fascia is joined in the vertical direction .
[0008]
According to the first configuration of the present invention, in the present invention, a parting line is formed between the upper end edge of the bumper fascia disposed at the front portion of the vehicle and the lower end edge of the bonnet. A front vehicle body structure of an automobile in which a radiator shroud panel extending in the width direction and a shroud door upper panel extending in the vehicle width direction are fixed to the upper portion of the radiator shroud panel, and the shroud door upper panel faces forward. And an overhanging extension is provided.
[0009]
And the rear part of the retainer is fixed to the extension part, but since the retainer is a member formed in a shape along the back of the upper part of the bumper fascia, the load such as weight is temporarily applied from above. Even if added, the contact area between the bumper fascia and the retainer is large, and it is difficult for the bumper fascia and the retainer to be deformed. The effect that the retainer is less likely to be deformed due to the large contact area is the same even when the vehicle is used for a long time, and droop due to the weight of the bumper fascia can be minimized.
[0010]
Furthermore, according to the first configuration, is provided to the shroud upper panel, the extending portion protruding toward the front, the reinforcing member for supporting the the extending portion is also fixed. That is, since the extension portion , the reinforcing member, and the rear portion of the retainer are coupled in the vertical direction above the front end portions of the pair of left and right front side frames extending in the vehicle front-rear direction, the retainer is received from the bumper fascia. Since the load is also applied to the reinforcing member via the extension portion, the effect of preventing the retainer and the extension portion from being deformed can be further increased.
[0011]
The front body structure of an automobile according to the second configuration of the present invention is such that the extension portion is formed integrally with the shroud upper panel in the first configuration.
[0012]
According to the 2nd structure of this invention, since the extension part which protruded toward the front from the shroud door upper panel is made into the integral molding with a shroud door panel, a number of parts can be reduced and cost reduction can be performed.
[0013]
The front body structure of the automobile according to the third configuration of the present invention is a bracket fixed in the first configuration after the extension portion is formed separately from the shroud upper panel.
[0014]
According to the third configuration of the present invention, the bracket that is the extending member and the shroud upper panel are formed as separate members and are fixed by welding or the like. The degree of manufacturing freedom increases, and as a result, cost reduction can be expected.
[0015]
According to a fourth aspect of the present invention, there is provided a front vehicle body structure according to the present invention. In the first configuration, the reinforcing member is coupled to a bumper impact absorbing member connected to the front end of the front side frame member with the radiator shroud panel interposed therebetween. Is.
[0016]
According to the fourth configuration of the present invention, the bumper impact absorbing member and the reinforcing member are provided on the front side of the radiator shroud panel, and the shroud door upper panel is further extended from the reinforcing member through the extending portion described in the first configuration. Since it is continuously connected and the front end of the front side frame is connected to the bumper shock absorbing member with the radiator shroud panel interposed therebetween, the strength and rigidity of the radiator shroud panel can be greatly increased.
[0017]
【The invention's effect】
As described above, the present invention can prevent the bumper fascia from drooping, and even when a load such as weight is applied to the bumper fascia, the retainer that supports the upper edge of the bumper fascia has high rigidity between the extension part and the reinforcing member. Since it is fixed, there is no drooping deformation, and the appearance quality of the parting line portion with the lower edge of the bonnet can be ensured. And since this can be realized only by fixing a relatively small member by welding or a fastening member, it is extremely simple and low cost.
[0018]
Further, as a structure around the radiator shroud panel according to the present invention, an extension portion is fixed to the upper portion of the radiator shroud panel, and a reinforcing member is fixed downward from the extension portion , and further, the reinforcing member is a radiator shroud. be those connected to the shock-absorbing member that is coupled to the lower portion of the panel, as a result, it is Rukoto improve the strength of the radiator shroud panels, stiffness.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a configuration of a member connected to a radiator shroud panel, FIG. 2 is a view showing a section AA in FIG. 1, and FIG. 3 is a view showing a section BB in FIG. The shroud is integrally arranged from the left end to the right end at the front part of the vehicle and is substantially symmetrical from the vehicle center, but FIG. 1 represents only the left side when viewed from the front of the vehicle. It is shown as an example.
[0020]
In FIG. 1, a radiator shroud panel 1 is disposed in the vehicle width direction, and a shroud door upper panel 2 is disposed so as to cover an upper end portion of the radiator shroud panel 1 and is joined by welding. As shown in FIG. 2, the radiator shroud panel 1 and the shroud upper panel 2 are disposed in a state of being covered with a bumper fascia 13 positioned in front of the shroud panel and a bonnet 15 positioned above. A parting line L is formed between the upper end portion of 13 and the lower end portion of the bonnet 15.
[0021]
As can be seen from FIGS. 1 to 3, an extension portion 3 is formed on the front portion of the shroud door upper panel 2 so as to protrude forward of the vehicle. The extending portion 3 is substantially U-shaped, and has a horizontal surface 3a and left and right wall surfaces 3b. Further, a bolt hole 6 is provided in the horizontal surface 3 a, and after being aligned with the bolt hole 6 provided in the retainer 4, the bolt B is inserted and fastened to support the retainer 4 with a nut N.
[0022]
On the other hand, a reinforcing member 5 is fastened to the lower surface of the horizontal surface 3 a of the extension portion 3 with the above-described bolt B and nut N to support the extension portion 3. The reinforcing member 5 is fixed by welding at a point W at the upper portion of the panel member 7 whose lower end portion 5a is fixed to the radiator shroud panel 1 by welding (see FIG. 3), and has an extended surface 5b extending toward the front upper side. Thus, an upper end surface 5d is formed, and the upper end surface 5d, the retainer 4, and the horizontal surface 3a of the extending portion 3 are fastened with bolts and nuts.
[0023]
The wall surface 5c of the reinforcing member 5 shown in FIG. 2 is a wall surface formed so as to extend forward from the surface 5a and the surface 5b, and extends extending forward from the shroud upper panel 2. Since the rigidity with respect to the load from above is increased together with the left and right wall surfaces 3b of the portion 3, there is a deformation preventing effect.
[0024]
Next, the retainer 4 will be described with reference to FIGS. As described above, the retainer 4 is placed on the horizontal surface 3a of the extension 3 extending forward from the shroud door upper panel 2 and fastened together with the reinforcing member 5 by bolts and nuts. The retainer 4 is a member composed of a front part 4F and a rear part 4R. The rear part 4R is a part fastened to the horizontal surface 3a of the extension part 3, and the front part 4F is front-upward from the rear part 4R forward. The surface is inclined to the front and lower through the top and the top, and this shape follows the shape of the back of the upper end of the bumper fascia 13, and the bumper fascia 13 and the front part 4F are slightly Have a good clearance.
[0025]
As described above, the front portion 4F of the retainer 4 has a shape along the rear surface of the upper end of the bumper fascia 13. Even if the back surface and the front portion 4F of the retainer 4 come into contact with each other, the contact area is large and the surface load can be suppressed. Therefore, the retainer can be prevented from being deformed, and finally the appearance quality accompanying the expansion of the parting line can be prevented. It is because it becomes possible to suppress a fall. In addition, as described above, the effect of suppressing the expansion of the parting line in the long term is the strength of the extending portion 3 and the reinforcing member 5 fastened so as to support the retainer 4 from below. The structure with increased rigidity also contributes greatly.
[0026]
In the embodiment of the present invention, the front surface of the panel member 7 joined to the lower end portion 5a of the reinforcing member 5 by welding is provided with a plurality of beads 9a and elongated holes 9b so as to absorb the impact in the event of a frontal collision of the vehicle. The rear end of the crash can 9 is connected to the front end of the front side frame 8 via the panel member 7 and the radiator shroud panel 1.
[0027]
This is not only for enhancing the safety of the vehicle at the time of a frontal collision, but also connecting the crash can 9 and the front side frame 8 as rigid bodies to the radiator shroud panel 1 and from the panel member 7 joined to the radiator shroud panel 1. The shroud door upper panel 2 fixed to the upper part of the radiator shroud panel 1 through the reinforcing member 5 toward the front upper side and further from the upper end portion 5d of the reinforcing member 5 through the extending portion 3 is continuously connected integrally. Therefore, since the strength and rigidity around the radiator shroud panel 1 are further increased and the vibration of the front part of the vehicle is suppressed, the vibration of the bumper fascia 13 is also suppressed and the drooping of the own weight can be suppressed.
[0028]
As described above, according to the first embodiment, the shroud door upper panel is disposed at the upper end portion of the radiator shroud panel 1 that is positioned in the vehicle width direction and positioned behind the bumper fascia 13 and below the bonnet 15 in front of the vehicle. The shroud door upper panel 2 is integrally formed with an extension part 3 so as to project forward, the extension part 3 has a reinforcing member 5 on its lower surface and a retainer 4 on its upper surface with bolts and nuts. It has been concluded. The front portion 4F of the retainer 4 has a shape along the rear surface of the upper end portion of the bumper fascia 13, while the reinforcing member 5 has a lower end portion 5a extending along the inclined surface 5b extending rearward and downward along with the wall surface 5c. 1, the retainer 4 and the extension portion 3 are not easily deformed, and the party formed between the upper end portion of the bumper fascia 13 and the lower end portion of the bonnet 15. It is possible to suppress a decrease in appearance quality due to the expansion of the gline L with the bumper fascia drooping.
[0029]
Further, as described above, since the crash can 9 and the front side frame 8 are connected to the front and rear of the radiator shroud panel 1, respectively, the radiator shroud panel 1 has a structure with increased strength and rigidity. Since the vibration of the bumper fascia 13 can be suppressed, the self-weight droop can be suppressed for a long time.
[0030]
Next, a second embodiment according to the present invention will be described. FIG. 4 is a diagram showing a cross-sectional BB diagram used in the first embodiment as a second embodiment. The second embodiment is different from the first embodiment in that the shroud door upper panel and the extension portion are integrally formed in the first embodiment. In this embodiment, the reinforcement member and the panel member are integrally formed by the point that they are connected after being molded separately and the lower end portion of the reinforcement member being welded to the panel member. It is a point that has been molded.
[0031]
That is, as shown in FIG. 4, the shroud door upper panel 32 is fixed to the upper end portion of the radiator shroud panel 31 that is positioned in the vehicle width direction and positioned behind the bumper fascia 13 and below the bonnet 15 in front of the vehicle. A bracket 33 as an extension member is welded and fixed above the front portion of the shroud door upper panel 32 so as to project forward, and the bracket 33 is reinforced on the lower surface thereof in the same manner as in the first embodiment. The upper end portion 35d of the member 35 is formed by fastening the rear portion 34R of the retainer 34 to the upper surface with a bolt and nut. The front portion 34F of the retainer 34 has a shape along the back surface of the upper end portion of the bumper fascia 13. On the other hand, the reinforcing member 35 has an inclined surface 35b extending downward and rearward along with the wall surface 35c, and the lower end portion 35a has a radiator shroud panel. 1 is joined. As described in the first embodiment, the effect of this structure can prevent the parting line L from spreading due to the bumper fascia drooping and the appearance quality from being deteriorated. As a separate body from the shroud door upper panel 32, it can be welded and fixed later, so that it is possible to easily cope with a change in the shape of the bumper fascia, and the reinforcing member 35 is a panel in the first embodiment. The integral molding with the member 7 can reduce the number of parts and contribute to cost reduction.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a radiator shroud panel according to the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 (first embodiment).
FIG. 3 is a cross-sectional view BB of FIG. 1 (first embodiment).
FIG. 4 is a cross-sectional view BB of FIG. 1 (second embodiment).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 31 ... Radiator shroud panel 2, 32 ... Shroud door upper panel 3 ... Extension part 33 ... Bracket 4, 34 ... Retainer 5, 35 ... Reinforcement member 8 ... Front side frame 9 ... Crash can (bumper shock absorption member)
13 ... Bumper Facia 15 ... Bonnet L ... Parting Line

Claims (4)

A bumper fascia is disposed in the front part of the vehicle, and a parting line is formed by an upper end edge of the bumper fascia and a lower end edge of the bonnet. In the front body structure of an automobile in which a shroud door upper panel that is fixed to the upper part of the panel and extends in the vehicle width direction is disposed,
The shroud door upper panel is provided with an extending portion protruding forward,
Above the front end portions of the pair of left and right front side frames extending in the longitudinal direction of the vehicle, the extension portion, the reinforcing member for supporting the extension portion, and the front portion along the back surface of the upper portion of the bumper fascia A front body structure of an automobile in which a rear portion of a retainer formed on the upper and lower sides is coupled in the vertical direction .   The front body structure of an automobile according to claim 1, wherein the extending portion is formed integrally with the shroud upper panel.   The front body structure of an automobile according to claim 1, wherein the extension portion is a bracket fixed after being molded separately from the shroud door upper panel.   2. The front body structure of an automobile according to claim 1, wherein the reinforcing member is coupled to a bumper impact absorbing member connected to a front end of the front side frame member with the radiator shroud panel interposed therebetween.

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