JPH0450084A - Front body structure of car - Google Patents

Abstract

PURPOSE:To lower a bon-net and shorten a nose by inwardly bending a front frame across the width of the car at its middle part in the longitudinal direction, and connecting the front end part of the front frame to a dash lower panel with a sub-frame. CONSTITUTION:In a midship type front side car body structure, a front frame 10 extending from the front face of a dash lower panel 3 to the front of the car body, is formed a structure of closed cross-section 13 extending in the longitudinal direction of the car by joining its front frame-inner 11 and front frame- outer 12, and its rear part is connected to the vertical wall part 9a of a suspension tower 9. At this time, the front frame 10 is inwardly bent across the width of the car at its middle part in the longitudinal direction of the car to form a bent part 10a and to extend the front part before the bent part 10a of the front frame 10 forward. Then, the front end part of the front frame 10 and the dash lower panel 3 are connected to each other by a sub-frame 16 extending about linearly in plan view. Thus, buckling of the front frame 10 at the time of collision can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a front body structure of an automobile that meets design requirements such as a short nose and a low bonnet.

(Prior Art) Conventionally, as a front body structure of an automobile, there is a structure described in, for example, Japanese Utility Model Application Publication No. 1-167976.

That is, a darts lower panel is provided that separates the engine room and the passenger compartment, and the front of this darts lower panel and the shroud side panels are connected by a front frame that extends linearly in the longitudinal direction of the vehicle body. Connect part of the frame to the vertical wall of the suspension tower,
Furthermore, this is a typical front body structure of an automobile, in which a fixed headlamp is attached to the front part of the above-mentioned shroud sight panel.

Due to the vehicle design, the front body structure of such automobiles has been changed to a lower bonnet and short nose, and retractable headlamps (movable headlamps or concealed headlamps) are used instead of fixed headlamps. When installing a tractor-pull headlamp, there was a problem that design requirements could not be met because there was not enough space in the conventional structure to install a tractor-pull headlamp.

(Objective of the Invention) The purpose of the present invention is to provide a front body structure for an automobile that is capable of improving ball-closing performance while satisfying the above-mentioned design requirements for a low horn net and a short nose. .

(Structure of the Invention) The present invention provides a front body structure for an automobile including a front frame coupled to a vertical wall of a suspension tower, wherein the front frame is bent inward in the vehicle width direction at an intermediate portion in the longitudinal direction. and a front part of an automobile in which the front part of the front frame extends forward from the bent part of the front frame, and the front end of the front frame and the lower panel of the front frame are connected by a sub-frame that extends substantially in a straight line in a plan view. It is characterized by a car body structure.

(Effects of the Invention) According to the present invention, by bending the above-mentioned front frame inward in the vehicle width direction at its longitudinally intermediate portion, a space for a retractable headlamp can be secured. As a result, it is possible to meet the design requirements such as low-bond*solarization and wide-nose design.

Moreover, since the front end of the front frame and the darts lower panel are connected by a sub-frame that extends substantially in a straight line in plan view, both frames can resist the impact load, and the front frame Since it does not buckle, it has the effect of improving the ball striking performance.

(Example) An embodiment of the present invention will be described in detail below based on the drawings.

The drawing shows the front body structure of a midship type car.
In FIGS. 1 to 5, a darts lower panel 3 is provided that partitions the front l, the rank room 1, and the passenger compartment 2,
A dash cross member 6 consisting of two members 4.5 is attached to the lower end corner of this darth lower panel 3.
A closed cross section 7 extending in the vehicle width direction is formed.

On the other hand, a suspension tower 9 provided approximately at the center of the left and right tire houses (one side is shown in the drawing for convenience of illustration) 8.8 is disposed at the front of both ends of the above-mentioned darts lower panel 3,
Front and rear flange portions 9a and 9b of this suspension tower 9 are bonded and fixed to the above-mentioned tire house 8 and darts lower panel 3.

A front frame 1o is provided that extends from the front surface of the above-mentioned darts lower panel 3 toward the front of the vehicle body.

As shown in FIGS. 4 and 5, this front frame 10 is constructed by joining a front frame inner 11 and a front frame outer 12 to form a closed section 13 extending in the longitudinal direction of the vehicle body.
The rear part of the front frame 10 is connected to the vertical wall portion 9c of the above-mentioned suspension tower 9, as shown in FIG.

Further, a joining flange portion 11a formed at the rear end of the front frame inner 11 described above is joined to the needle lower panel 3 described above.

Then, as shown in FIG. 2, the above-mentioned front frame 10 is bent inward in the vehicle width direction at the middle part in the longitudinal direction to form a bent part 10a.
The front portion extends forward from the bent portion 10a.

Furthermore, a substantially triangular gusset 14 connecting the front frame inner 12 and the darts lower panel 3 is provided at the root portion of the front frame 1o described above, and the front and rear of this gusset 14 and the lower UJZ (7) each m 7 lanshi m
l 4 a, J 4 b, J 4 cl, 4
d is joined to the front frame inner 12, front frame outer 11, and darts lower panel 3, respectively, to form a closed section 15 located below the above-mentioned closed section 13.

The front end portion of the above-mentioned front frame 1o whose root portion is reinforced with such a gusset 14 and the darts lower panel 3
As shown in FIG. 2, they are connected by a subframe 6 that extends substantially linearly in plan view.

In this embodiment, a square pipe is used as the above-mentioned subframe 16, and the connection structure between the front end of this subframe 16 and the front end of the above-mentioned front frame lo, as well as the subframe 1
The connection structure between the rear end of 6 and the darts lower panel 3 is constructed as follows.

That is, a collar 17 is disposed within the square vibrator at the front end of the subframe 16, and a port 18 that is inserted into the collar 17 from below the subframe 16 is welded and fixed to the front 12 of the front frame 10 in advance. Natsu 19
By being screwed together, the front end of the subframe 16 and the front end of the front frame 10 are connected.

Further, the rear end portion of the sub-frame 16 described above is formed into a bifurcated shape as shown in FIG.
a, 16b By screwing the bolt 21 inserted into the collar 20 from below into the nut 22 welded and fixed to the member 5 of the dash cross member 6 described above, the rear end of the sub frame 16 is attached to the dash cross member 6. It is connected to the darts lower panel 3 via.

Furthermore, a floor frame 24 extending in the longitudinal direction of the vehicle body is provided on the lower surface of the floor panel 23.
The front end of 4 and the forked portions 1.6a, 6b, which serve as the rear end of the above-mentioned sub-arm 16, are connected as shown in FIG.

In addition, 25 in FIG. 1 is a front bumper, 26 is a front bumper, 27 in FIG. 30 in Figure 4 is the apron reinforcement mend door, 31 is the apron reinforcement mendor, 32 in Figure 5 is the apron junction, 3
3 is a wheel apron.

In addition, the above-mentioned apron reinforcement 30.31
The front part of the above-mentioned front frame 10 is extended to the front of the vehicle body, and a spare tire (not shown) is arranged in the front trunk room 1 at the bottom of the main net 25, and the front end of this spare tire and the above-mentioned apron reinforcement are arranged. 3
0.31 as the road surface, and after crashing only the front part of the front frame 10 mentioned above at the time of a collision, the collision load is transferred to the left and right apron reinforcement members 1.
-30.31 and a spare tire, it is configured to suppress deformation of the cabin 2.

In this way, since the above-mentioned front frame 10 is bent inward in the vehicle width direction at the middle portion in the longitudinal direction, a space is secured for mounting the retractable headlamp 28.
As a result, the so-called R of the vehicle body form, which increases the corner radius shape of the front part of the vehicle, has a lower bonnet, a shorter nose, and a larger corner radius at the front of the vehicle.
It has the effect of meeting the design requirements of

Moreover, the subframe 16 extends substantially in a straight line in plan view.
(See Figure 2), the front end of the front frame 10 and the darts lower panel 3 are connected, so that both frames 10 and 16 can resist the ball-slide load, as described above in the event of a ball-slide. Since the front frame 10 does not buckle, it is possible to improve the ball striking performance.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, FIG. 1 is a side view showing the front body structure of an automobile, FIG. 2 is a plan view thereof, and FIG. 3 is a sectional view taken along the line A-A in FIG. 2. , FIG. 4 is a sectional view taken along the line B--B in FIG. 2, and FIG. 5 is a sectional view taken along the line C--C in FIG. 1. 3. Lower panel 9... Suspension tower 9c... Vertical wall part 10... Front frame], Oa... Bent part 16... Sub frame

Claims (1)

[Claims] (1) A front body structure of an automobile including a front frame coupled to a vertical wall of a suspension tower, wherein the front frame is bent inward in the vehicle width direction at an intermediate portion in the longitudinal direction, and the front frame is bent inward in the vehicle width direction. A front body structure for an automobile, wherein the front end of the front frame and the dash lower panel are connected by a sub-frame extending in a substantially straight line in plan view, the front end of which extends forward from the bent portion.