JPS6236688Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a front body structure of an automobile.

In recent years, reducing the weight and fuel consumption of automobiles has become a major issue, and for this reason, miniaturization of automobiles has been promoted, and vehicles commonly called liter cars have been developed. In order to reduce weight, this type of car uses a method of thinning the body plates and reinforcing only the necessary parts.

On the other hand, in automobiles, the requirement to protect occupants in the event of a collision must be fully satisfied. This collision prevention measure is achieved by making the front and rear parts of large vehicles relatively longer than the passenger compartment.
It was also easy to increase the overall rigidity.

However, in a small car, the overall length is limited, and the passenger compartment cannot be made small to avoid impairing comfort, and the structure cannot be similar to that of a large car. In addition, in large cars, strength can be increased by increasing the thickness of the plate, but in small cars, the output of the engine installed in it is limited, so it is not possible to increase the thickness of the plate, and it is also possible to reduce weight. There was a problem that they were contradictory.

Therefore, in order to prevent the deformation of the passenger compartment, especially in the event of a head-on collision (when the front end of the vehicle collides with an obstacle), conventionally, the upper side of the darts pad panel has been installed near both sides of the cowl at the front of the vehicle body. A closed cross-section structure in which the cowl side pads and wheel apron reinforcements are joined extends forward from the front pillar, thereby forming a reinforcing structure. There was a problem that the connection was not sufficient.

Therefore, in order to solve this problem, the wheel apron reinforcement and front pillar that constitute the closed cross-section structure were connected with a gusset plate to increase the structural strength (Japanese Patent Publication No. 54 -Refer to Publication No. 14005) has been proposed.

However, since the gusset plate simply connects the wheel apron reinforcement and the front pillar, it cannot be said to have sufficient strength.

The present invention has been developed in view of these points, and by providing a closed cross-sectional structure with upper and lower two stages on the side of the dashi upper panel, it aims to improve the structural strength, and also improves the structural strength near the upper hinge mounting part in the hinge pillar. The purpose is to increase the strength of the upper hinge mounting portion by forming knots in the upper hinge mounting portion.

For this purpose, the configuration of the present invention is such that an upper closed cross section is provided on the upper side of the dash top panel, which is connected to the front pillar by the dash top panel, the cowl side top, and the wheel apron reinforcement. is formed, and the side part of the lower cowl panel is joined to the front part of the cowl side extending forward from the hinge pillar, and the side part of the lower cowl panel is joined to the front part of the cowl side extending forward from the hinge pillar. A gusset having a bottom wall portion is fixed, and the gusset, the dash upper panel, and the cowl side form a lower closed section adjacent to the lower side of the upper closed section, and the hinge pillar outer of the hinge pillar The upper side is bent from the outer side of the vehicle body toward the inner side to close the closed cross section of the hinge pillar, and the inner side of the bent part is further bent upward, and the upper part of the inner side bent part is closed. The lower part of the front pillar inner is connected to the lower part of the front pillar inner, and the upper hinge mounting member is connected to the edge of the outer side bent part. The closed cross section increases the structural strength of the front portion of the vehicle body, and the bent portion of the hinge pillar outer as a joint increases the strength of the upper hinge attachment portion.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

1 to 5 show a first embodiment of the present invention, in which reference numeral 1 denotes a dart lower panel that separates the passenger compartment from the engine room and constitutes the front wall of the passenger compartment; The front end of the dash upper panel 2, which extends rearward and upward with a slight inclination, is joined to the upper end, and the upper side end of the dash upper panel 2 has a cowl side upper panel extending in the longitudinal direction of the vehicle body. 3 and a wheel apron reinforcement 4 are arranged to face each other with the cowl side upper 3 positioned inside. The upper end portions of the cowl side upper 3 and wheel apron reinforcement 4 are joined to each other, while the lower end portions are respectively joined to the dash rear upper panel 2, so that these three members can move the vehicle body in the longitudinal direction. An extending upper closed section 5 is formed. A rear end portion of the upper closed section 5 is connected to a front pillar 6, which will be described later.

Reference numeral 6 denotes a front pillar that is arranged to extend substantially vertically on both sides of the front part of the vehicle interior. The front pillar outer 8, which has a cross-sectional shape protruding in the opposite direction, is joined to each other to form a closed cross-sectional shape. A hinge pillar 9 for attaching a door hinge is connected to the lower part of the front pillar 6, and the hinge pillar 9 has a hinge pillar inner 10 with a cross-sectional shape that projects inwardly of the vehicle body and a cross-sectional shape that projects outwardly of the vehicle body. The hinge pillar outer 11 is joined to each other to form a closed cross-sectional shape.

The upper side of the hinge pillar outer 11 is bent from the outer side of the vehicle body toward the inner side, and then further bent upward from the inner end, and serves as a horizontal inner side bending part extending in the horizontal direction. portion 12a and a vertical portion 12 as an outer side bent portion extending vertically upward from the inner end of the horizontal portion 12a.
a two-step bent portion 12 having a substantially L-shaped cross section;
is formed. Horizontal portion 12 of the bent portion 12
a crosses the hinge pillar 9 and closes its cross section. Further, the upper end of the hinge pillar inner 10 is connected to the lower end of the vertical portion 12b, and the lower end of the front pillar inner 7 is connected to the upper end. Here, in response to the fact that the upper part of the hinge pillar outer 11 is bent inward to the vehicle body as described above, the bent portion 12
The lower end of the front pillar outer 8 is bent at the edge of the horizontal portion 12a of the horizontal portion 12a of the portion 12.
Upper hinge mounting member 1 extending downward to
3 is connected. The upper hinge mounting member 13
is formed so that the protruding surface 13a is substantially continuous with the hinge mounting surface 9a of the hinge pillar 9 (hinge pillar outer 11), and the side edge of the upper hinge mounting member 13 is formed in a vertical portion 12b of the bent portion 12.
is joined to.

On the other hand, the hinge pillar outer 11 is attached to the hinge pillar 9 at the front part of the hinge pillar outer 11.
A cowl side 14 extending further forward is integrally formed, and the front end of the cowl side 14 is connected to the side end of the dart lower panel 1. Further, the upper part of the cowl side 14 is recessed toward the inside of the vehicle body than the lower part, and the recessed part 1
5 so that the bottom part 15a of the hinge pillar outer 11 is flush with the vertical part 12b of the bent part 12,
In other words, the bottom part 15a of the recessed part 15 and the protruding surface 10a of the hinge pillar inner 10 are formed so as to be substantially continuous in the longitudinal direction of the vehicle body, and the recessed part 1
The upper end portion of 5 is joined to the lower surface of the dash upper panel 2 where it is joined to the cowl side upper 3. Incidentally, a rear end portion of a front fender apron 16 constituting a side wall of the engine room is connected to the side portion of the dart lower panel 1, and the front fender apron 16 is connected to the tire house portion 16.
The portion in front of a is located at approximately the same position as the bottom 15a of the recessed portion 15 of the cowl side 14 (the protruding surface 10a of the hinge pillar inner 10) with respect to the left-right direction of the vehicle body.

Further, on the outer side between the joint portion of the cowl side 14 with the dart lower panel 1 and the hinge pillar 9, there is a bottom wall portion 17a extending in the horizontal direction and a substantially triangular triangle extending vertically upward from the outer end of the bottom wall portion 17a. A gusset 17 having a shaped side wall 17b is disposed corresponding to the recess 15, and the inner end of the bottom wall 17a of the gusset 17 is connected to the bottom 15a of the recess 15.
The upper end portions (hypotenuse portions) of the side wall portions 17b are respectively joined to the lower surfaces of the dash upper panels 2 where they are joined to the wheel apron reinforcements 4. Further, the side wall portion 17 of the gusset 17
b The rear end portion extends rearward so as to cover the protruding surface 13a of the upper hinge attachment member 13, and the rear end portion of the extension portion 17c is overlappingly connected to the rear end portion of the upper hinge attachment member 13. , is configured to reinforce the upper hinge attachment member 13. Therefore, the above-mentioned gusset 17 and dashi upper panel 2
and the cowl side 14 form a lower closed section 18 adjacent to the lower side of the upper closed section 5.

In addition, 19 is the cowl, 20 is the front fender,
21 is a lid, 22 is a hinge reinforcement superimposed on the inner surface of the upper hinge mounting member 13, and 23 is a bent portion 1 of the hinge pillar outer 11.
2. This is an opening for hinge attachment work provided in the vertical portion 12b corresponding to the upper hinge attachment member 13.

Therefore, in the above embodiment, a two-stage closed cross-section structure consisting of upper and lower closed cross sections 5 and 18 is formed on the side of the dash upper panel 2, and the lower closed cross section 18 is bridged at the corner of the connection between the front pillar 6 and the upper closed section 5, so that the strength of the front pillar 6 and the hinge pillar 9 can be significantly increased by effectively reinforcing both the closed sections 5 and 18. This greatly improves the structural strength of the front of the vehicle.

Furthermore, since the bottom portion 15a of the concave portion 15 of the cowl side 14 constituting the lower closed section 18 and the protruding surface 10a of the hinge pillar inner 10 are continuous in the longitudinal direction of the vehicle body, the front The continuity of both can withstand the impact force acting through the ender apron 16, and together with the above-mentioned improvement in structural strength, this is effective as a countermeasure against collisions.

Furthermore, since the closed cross sections 5 and 18 can be formed without performing difficult processing such as deep drawing on the cowl side 14 and the like, the forming process can be easily performed.

Furthermore, the lower closed cross section 18 is a double seal in which the upper end of the recessed part 15 of the cowl side 14 is joined to the dash upper panel 2 on the inside, and the upper end of the side wall 17b of the gusset 17 is joined on the outside. This structure prevents water such as rainwater from entering the inside of the vehicle, and in the unlikely event that the lower closed section 1
Even if water enters the inside of the gusset 8, it can be discharged to the outside from between the cowl side 14 and the bottom wall 17a of the gusset 17, which is effective in preventing water leakage.

In addition, the hinge pillar 9 has, in the vicinity of the upper hinge attachment portion (lower end of the upper hinge attachment member 13),
Since its cross section is closed by the horizontal portion 12a of the bent portion 12, resulting in a so-called knotted structure, the strength of the upper hinge attachment portion of the hinge pillar 9 can be increased.

FIG. 6 shows a second embodiment of the present invention, in which a horizontal portion 1 of a bent portion 12 of a hinge pillar outer 11 is shown.
An upper hinge mounting member 13' separate from the front pillar outer 8' is connected to the edge of the front pillar outer 8', and the lower end of the front pillar outer 8' is extended downward inside the upper hinge mounting member 13'. The formed hinge reinforcement 22' is polymerized, and in this case as well, the same effects as in the first embodiment can be achieved.

As explained above, according to the present invention, two upper and lower closed cross sections are formed on the sides of the needle sleeve panel without requiring deep drawing, etc., thereby simplifying the forming process. While achieving this, the structural strength of the front part of the vehicle body can be greatly improved. In addition, the continuity between the cowl side and the hinge pillar inner can withstand the impact force at the time of a frontal collision, so it is sufficiently effective as a countermeasure against collision. Moreover, the double seal structure of the lower closed section and the discharge structure to the outside of the vehicle are advantageous in preventing water leakage, and the joint structure increases the strength of the upper hinge attachment part of the hinge pillar, which has excellent practical effects. It is something to play.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIGS. 1 to 5 show the first embodiment. FIG. 1 is a perspective view of the front part of an automobile body, and FIG. 3 is a sectional view taken along the - line in FIG. 1, FIG. 4 is a sectional view taken along the - line in FIG. 1, FIG. 5 is an exploded perspective view, and FIG. 6 shows the second embodiment. This is a diagram equivalent to Figure 5. 1... Datsushi lower panel, 2... Datsushi atsupa panel, 3... Cowl side atsupa, 4...
Wheel apron reinforcement, 5...
Upper closed section, 6...Front pillar, 7...Front pillar inner, 9...Hinge pillar, 10...
... Hinge pillar inner, 11 ... Hinge pillar outer, 12 ... Bent part, 13, 13' ... Upper hinge mounting member, 14 ... Cowl side, 17 ...
...Gusset, 17a...Bottom wall portion, 18...Lower closed section.

Claims (1)

[Scope of utility model registration request] An upper closed cross section is formed on the upper side of the dash upper panel, the upper closed section is connected to the front pillar by the dash upper panel, the cowl side upper, and the wheel apron reinforcement, and extends forward from the hinge pillar. A side part of the lower cowl panel is joined to the front part of the cowl side, and a gusset having a bottom wall part is fixed to the outer side between the joint part of the cowl side with the lower cowl panel and the hinge pillar. The gusset, dash upper panel, and cowl side form a lower closed section adjacent to the lower side of the upper closed section, and the upper side of the hinge pillar outer of the hinge pillar extends from the outer side of the vehicle body to the inner side. The inner side of the bent portion is further bent upward, and the lower part of the front pillar inner is connected to the upper part of the inner side bent portion, and the outer A front body structure for an automobile, characterized in that an upper hinge attachment member is connected to an edge of a side bent portion.