JPH0930449A - Automobile dash floor panel peripheral structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automobile dash floor panel peripheral structure capable of effectively absorbing a force applied to a front side member and reducing the number of parts. SOLUTION: A gassete 15 roughly hat shaped in section is attached to the car room R side of a dash floor panel 1 with the connecting part S of the rear end of each front side member 1 stepped over roughly in a car width direction and the upper side flange 15c and the lower side flange 15d of the gassette 15 are respectively connected to the upper and lower positions of the connecting part S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle dash lower panel peripheral structure.

[0002]

2. Description of the Related Art As a conventional vehicle dash lower panel peripheral structure, for example, those shown in FIGS. 4 to 6 are known (as a similar technique, JP-A-5-338560).
Reference). In the following description, A is the outer side and B is the inner side in the vehicle width direction in the drawings.

Reference numeral 1 denotes a dash lower panel, which divides an engine room E and a vehicle interior R. Reference numeral 2 denotes a front side member, which is arranged in a pair on the left and right inside the engine room E (note that only the right side structure is shown in the figure). The front side member 2 has a closed cross-section structure by connecting the closing plate 3, and the rear end thereof is connected to the front surface of the dash lower panel 1 in an abutting state.

A dash lower cross member 4 is connected to the lower end of the front surface of the dash lower panel 1,
A suspension member 5 is provided in front of the dash lower cross member 4. A suspension bracket 7 is attached to the lower portion of the suspension member 5 via a suspension reinforcement 6. A suspension member (not shown) is supported by the suspension bracket 7. Further, a floor panel 8 is continuously connected to the lower end of the dash lower panel 1.

A through hole 1a for a steering column is formed in a portion of the dash lower panel 1 inside the connecting portion S of the front side member 2. Further, the dash lower panel 1 is superposed with a vibration-proofing reinforcement 9 inward from the area where the through hole 1a is formed. The reinforcement 9 is provided only in a relatively flat area of the dash lower panel 1 and necessary for vibration isolation, and is not provided in an area near the connecting portion S of the front side member 2. A through hole 9a corresponding to the through hole 1a is also formed in the reinforcement 9, and the through hole 9a portion of the reinforcement 9 is provided on the inside R side of the vehicle in order to enhance the support strength of a steering column (not shown). It is a convex portion 10 protruding toward.

Further, a wheel house 11 is formed at the outer end of the dash lower panel 1 in a state of bulging toward the vehicle compartment R side. The wheel house 11 has an inclined surface 11a with respect to the vehicle width direction, and an embossed portion 12 having a flat rear surface is integrally formed on the inclined surface 11a, and the rear surface of the embossed portion 12 is provided with a bracket 13 through an accelerator. A pedal 14 is attached. This accelerator pedal 14
Is a retainer 14a, a lever portion 14b, and a pedal portion 14c.
The lever portion 14b is rotatably supported at a position displaced inward by d from the center of the retainer 14a.

[0007]

However, in such a conventional technique, since the connecting portion S of the front side member 2 is formed of only one dash lower panel 1, a frontal collision of an automobile or the like occurs. Therefore, when an excessive input F is applied to the front end of the front side member 2, the input F may not be effectively absorbed. That is, in the structure as described above, since the strength of the connecting portion S in the dash lower panel 1 is not sufficient, the dash lower panel 1 is retracted by the input F transmitted from the front side member 2 (two points in FIG. 5). A fold X occurs in the middle part of the front side member 2 (see the part indicated by the chain line). Originally, the front side member 2 is capable of effective energy absorption by causing "shaft crushing" which is crushed only in the front-rear direction. However, when the fold X as described above occurs, the front side member 2 is crushed by the shaft. It does not occur, and effective energy absorption cannot be performed.

Therefore, as a countermeasure for that, it is necessary to add a reinforcing plate (not shown) from the closing plate 3 to the outer surface of the wheel house 11 in order to increase the strength of the connecting portion S of the dash lower panel 1. However, when such a reinforcing plate is added, the number of steps for connecting the front side member 2 is increased, and the added reinforcing plate must be rustproofed, which is very troublesome.

Further, the lever portion 14 of the accelerator pedal 14
Since b is displaced inward from the center of the retainer 14a by d, the pedaling force of the pedal portion 14c is unevenly applied to the bracket 13. Since such uneven pedaling force affects the durability of the bracket 13, it is necessary to take measures such as increasing the plate thickness in order to improve the durability of the bracket 13, and the cost is correspondingly increased.・
This leads to an increase in weight.

The present invention has been made by paying attention to such a conventional technique, and provides a dash lower panel peripheral structure for an automobile capable of effectively absorbing an input applied to a front side member and reducing the number of parts. It is provided.

[0011]

According to the first aspect of the present invention,
A gusset having a substantially hat-shaped cross section is mounted on the interior side of the dash lower panel in a state where the connection portion at the rear end of each front side member is straddled in the vehicle width direction, and the upper flange and the lower flange of the gusset are respectively attached to the connection portion. It is connected to the upper and lower parts.

According to the first aspect of the present invention, the gusset attached to the dash lower panel can form a closed cross section near the connecting portion of the dash lower panel. Therefore, the strength in the vicinity of the connection part of the dash lower panel is improved, so that even if an input is applied from the front side member, the dash lower panel does not recede, the front side member is surely axially crushed, and the input applied to the front side member is surely destroyed. Can be effectively absorbed.

According to a second aspect of the present invention, a wheel house is formed so as to bulge toward a vehicle interior side at an outer side portion of the dash lower panel in the vehicle width direction, and the wheel house is formed with an inclined surface with respect to the vehicle width direction. The outer flange in the vehicle width direction is connected to the inclined surface of the wheel house.

According to the second aspect of the present invention, since the outer flange of the gusset is connected to the wheel house, the mounting strength of the gusset is increased and the strength of the connecting portion of the dash lower panel is improved. Moreover, since the outer flange is connected to the inclined surface of the wheel house, even if the input applied from the front side member is applied to flatten the closed cross section formed by the dash lower panel and the gusset, The desired force acts in the shear direction between the outer flange of the gusset and the inclined surface, and as a result, a sufficient reaction force can be generated for the input. Therefore, the deformation of the closed cross section is prevented, and the strength of the dash lower panel near the connecting portion is further increased.

According to a third aspect of the present invention, the reinforcement having a convex portion toward the vehicle interior is formed at a portion inside the vehicle width direction with respect to the connection portion of the rear end of the front side member in the dash lower panel, and the reinforcement is superposed. The inner flange in the vehicle width direction of the gusset is connected to the convex portion.

According to the third aspect of the invention, since the inner flange of the gusset is connected to the convex portion of the reinforcement having high rigidity, the mounting strength of the gusset is increased, and as a result, the strength of the connecting portion of the dash lower panel is improved. .

According to a fourth aspect of the present invention, the mounting surface of the accelerator pedal is set on the gusset.

According to the invention of claim 4, since the mounting surface of the accelerator pedal is set to a gusset having a high rigidity, the durability of the mounting surface is deteriorated even if an uneven pedaling force is applied from the accelerator pedal. There is nothing to do. Therefore, it is not necessary to use a separate component such as a conventional bracket to mount the accelerator pedal, and the number of components can be reduced accordingly.

According to a fifth aspect of the invention, the mounting surface of the air conditioning unit is set on the gusset.

According to the fifth aspect of the invention, since the mounting surface of the air conditioning unit is set on the gusset, the air conditioning unit can be securely mounted.

According to a sixth aspect of the present invention, a bead portion is formed on the gusset along the vehicle width direction.

According to the sixth aspect of the invention, since the bead portion is formed in the gusset along the vehicle width direction, the strength of the gusset is increased, and the gusset can reinforce the vicinity of the connecting portion of the dash lower panel more reliably. .

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIGS. The same parts as those in the prior art are designated by the same reference numerals, and a duplicate description will be omitted.

On the vehicle interior R side of the dash lower panel 1 of this embodiment, a reinforcing gusset 15 is attached in a state of straddling the connection portion S at the rear end of the front side member 2 in the vehicle width direction. The gusset 15 has a hat-shaped cross section having a predetermined height h with respect to the dash lower panel 1. At the periphery of the gusset 15, the outer flange 15a, the inner flange 15b, the upper flange 15c,
The lower flange 15d is formed continuously.
Then, the outer flange 15a is joined to the inclined surface 16a of the wheel house 16 up to the surface position of the dash lower panel 1 in a state of following the surface shape thereof, and the inner flange 15b.
Is also joined to the surface position of the reinforcement 9 in a state of following the surface shape of the convex portion 10 of the reinforcement 9.
The upper flange 15c and the lower flange 15d are connected to the upper and lower parts of the dash lower panel 1, respectively.

The outer flange 15 of this gusset 15
A flat mounting surface 17 is formed in the vicinity of a along the vehicle width direction, and a mounting hole 17a with a welding nut for mounting the accelerator pedal 14 is provided on the mounting surface 17. Further, on the surface of the gusset 15 on the side of the vehicle compartment R, two bead portions 18 along the vehicle width direction are formed from the mounting surface 17 to the inner flange 15b in order to increase the rigidity of the gusset 15 itself. . An air conditioning unit (for example, a blower unit) or the like may be attached to the mounting surface of the gusset 15 on the passenger seat side (not shown) in the same manner as the accelerator pedal 14 on the driver seat side.

Next, the operation will be described.

According to this embodiment, the gusset 15 and the dash lower panel 1 can form a closed cross section H (see FIG. 2) having a height h at the connecting portion S position. Therefore, the strength of the dash lower panel 1 in the vicinity of the connecting portion S is increased, and even if an excessive input F is applied from the front side member 2, the dash lower panel 1 does not retract, so that the front side member 2 does not "bend" and does not join. The input F causes the front side member 2 to axially collapse only in the front-rear direction. Therefore, the input F can be effectively and sufficiently absorbed by the front side member 2, and the occupant protection function of the vehicle body is improved.

Also, the outer flange 15a of the gusset 15
Since the inner flange 15b and the inner flange 15b are respectively connected to the highly rigid wheel house 16 and the convex portion 10 of the reinforcement 9, the mounting strength of the gusset 15 is improved.
This point also contributes to improving the strength of the connecting portion S of the dash lower panel 1.

Further, as shown in FIG. 3, the outer flange 1
5a is connected to the inclined surface 16a of the wheel house 16, so the input F applied from the front side member 2
Is added so as to flatten the closed cross section H formed by the dash lower panel 1 and the gusset 15 in the front-back direction,
The force for flattening the outer flange 15a
Since it acts in the shearing direction between the inclined surface 16a and the inclined surface 16a, deformation of the closed cross section H is prevented as a result, and also in this respect, it contributes to the improvement of strength in the vicinity of the connecting portion S of the dash lower panel 1. That is, if the outer flange 15a is connected to the surface along the vehicle width direction, the input F will be added in the direction of separating them, but if it is connected to the inclined surface 16a with respect to the vehicle width direction as described above, The input F acts in the shearing direction between the two. In particular, the outer flange 15a and the inclined surface 16a are connected by spot welding, but at such a spot welding point, the connection strength against the force acting in the shearing direction is stronger than the force acting in the peeling direction. It is suitable for a structure in which spot welding is frequently used, such as an automobile body.

The mounting surface 17 of the accelerator pedal 14
Since the gusset 15 is set to have high rigidity, even if the accelerator pedal 14 has a structure in which the lever portion 14b is displaced inward from the center of the retainer 14a by d, the uneven pedaling force applied from the accelerator pedal 14 causes The durability of the mounting surface 17 does not deteriorate. Therefore, it is not necessary to attach a separate component such as a conventional bracket to mount the accelerator pedal 14, and the number of components can be reduced accordingly.

Further, since the dash lower panel 1 can be surely reinforced only by attaching the gussets 15 having the above-described shapes to the respective left and right connecting portions S of the dash lower panel 1, the accelerator pedal 14 around the dash lower panel 1 can be performed. There is no restriction on the layout flexibility of the air conditioner, air conditioning unit (not shown), or the like.

[0032]

According to the first aspect of the invention, the gusset attached to the dash lower panel can form a closed cross section near the connecting portion of the dash lower panel. Therefore, the strength in the vicinity of the connection part of the dash lower panel is improved, so that even if an input is applied from the front side member, the dash lower panel does not recede, the front side member is surely axially crushed, and the input applied to the front side member is surely destroyed. Can be effectively absorbed.

According to the second aspect of the present invention, since the outer flange of the gusset is connected to the wheel house, the mounting strength of the gusset is increased and the strength of the connecting portion of the dash lower panel is improved. Moreover, since the outer flange is connected to the inclined surface of the wheel house, even if the input applied from the front side member flattens the closed cross section formed by the dash lower panel and the gusset, The desired force acts in the shear direction between the outer flange of the gusset and the inclined surface, and as a result, a sufficient reaction force can be generated for the input. Therefore, the deformation of the closed cross section is prevented, and the strength of the dash lower panel near the connecting portion is further increased.

According to the third aspect of the invention, since the inner flange of the gusset is connected to the convex portion of the reinforcement having high rigidity, the mounting strength of the gusset is increased, and as a result, the strength of the connection portion of the dash lower panel is improved. .

According to the fourth aspect of the present invention, since the mounting surface of the accelerator pedal is set to the gusset having high rigidity, the durability of the mounting surface is deteriorated even if an uneven pedaling force is applied from the accelerator pedal. There is nothing to do. Therefore, it is not necessary to use a separate component such as a conventional bracket to mount the accelerator pedal, and the number of components can be reduced accordingly.

According to the fifth aspect of the invention, since the mounting surface of the air conditioning unit is set on the gusset, the air conditioning unit can be securely mounted.

According to the sixth aspect of the invention, since the bead portion is formed in the gusset along the vehicle width direction, the strength of the gusset is increased, and the gusset can more reliably reinforce the vicinity of the connecting portion of the dash lower panel. .

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure around a dash lower panel of an automobile according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line SA-SA shown in FIG.

FIG. 3 is a sectional view taken along the line SB-SB shown in FIG.

FIG. 4 is a perspective view showing a structure around a dash lower panel of a conventional automobile.

5 is a cross-sectional view taken along the line SC-SC shown in FIG.

6 is a cross-sectional view taken along the line SD-SD shown in FIG.

[Explanation of symbols]

 1 Dash lower panel 2 Front side member 9 Reinforce 10 Convex part 14 Accelerator pedal 15 Gusset 15a Outer flange 15b Inner flange 15c Upper flange 15d Lower flange 16 Wheel house 16a Inclined surface 17 Accelerator pedal mounting surface 18 Bead part S connection part R Vehicle interior E engine room

Claims (6)

[Claims] 1. A dash lower panel peripheral structure of an automobile, wherein rear ends of left and right front side members are connected to a front surface of a dash lower panel in a state of abutting each other. A gusset having a substantially hat-shaped cross-section is mounted in a state where the gusset is straddled in the vehicle width direction, and an upper flange and a lower flange of the gusset are respectively connected to upper and lower portions of the connecting portion, and a dash lower panel of an automobile. Peripheral structure. 2. A wheel house is formed so as to bulge toward the inside of the vehicle in an outer side portion of the dash lower panel in the vehicle width direction, and an inclined surface with respect to the vehicle width direction is formed in the wheel house, so that the gusset has an outer side in the vehicle width direction. The vehicle dash lower panel peripheral structure according to claim 1, wherein a flange is connected to an inclined surface of the wheel house. 3. A reinforcement having a convex portion toward the vehicle interior is formed at a portion inward of the vehicle width direction of a dash lower panel at a rear end portion of a front side member, and the convex portion is overlapped with a gusset vehicle. The vehicle dash lower panel peripheral structure according to claim 1 or 2, wherein inner flanges in the width direction are connected. 4. The vehicle dash lower panel peripheral structure according to claim 2, wherein an attachment surface of an accelerator pedal is set on the gusset. 5. The vehicle dash lower panel peripheral structure according to claim 3, wherein a mounting surface of the air conditioning unit is set on the gusset. 6. The vehicle dash lower panel peripheral structure according to claim 1, wherein a bead portion is formed on the gusset along the vehicle width direction.