JPS63258259A - Front body structure for automobile - Google Patents

Abstract

PURPOSE:To make it possible to securely prevent the projection of a pedal booster into a vehicle chamber at the time of forward collision by fixing the booster to a wheel house forward of a dash panel so as to doubly support collision force by means of the wheel house and the dash panel. CONSTITUTION:The front end of a floor panel 3 leads to a dash panel 21 extending in the vehicle width direction and the vertical direction. The panel 21 serves as the front wall of a vehicle chamber 2, and supports an accelerator pedal and a clutch pedal or addition to a brake pedal 22 which are located in the vehicle chamber 2. And, a distance from the dash panel 21 to the front end of a vehicle body is set to be relatively short, and moreover, a booster 23 for the brake pedal is arranged within a small space Z formed forward of the panel 21 in such a way as to be fixed to a wheel house 25. Therefore, the forward collision force can be doubly supported by means of the dash panel together with the wheel house in comparison with a structure only using the dash panel, thereby preventing projection of the booster into the vehicle chamber more effectively.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a front body structure of an automobile.

(Conventional Wave Technique) In recent automobiles, from the perspective of reducing driver fatigue, boosters are used to boost the operating force (depressing force) on the pedals operated by the driver, especially the brake pedal. These types of boosters are usually pneumatic type, especially vacuum boosters that use the differential pressure between the engine's intake negative pressure and atmospheric pressure to boost the power. A power type is used.

Conventionally, as shown in Japanese Utility Model Application Publication No. 55-157067, this booster has been positioned in front of a dash panel constituting the front wall of a vehicle interior and fixed to the dash panel. The input/output shaft of the booster extends in the longitudinal direction of the vehicle body, passes through the dash panel, extends into the passenger compartment, and is connected to the pedal in the passenger compartment.

(Problems to be Solved by the Invention) Incidentally, in the event of a frontal collision of an automobile, it is desirable to prevent equipment located in front of the dash panel from protruding into the passenger compartment as much as possible.

However, if the booster is fixed as a dash panel, the dash panel is the only strength member between the booster and the passenger compartment, so the booster, which is a relatively large member, cannot be connected to the passenger compartment. In particular, since the input/output shaft of the booster extends in the longitudinal direction of the vehicle body, in the event of a frontal collision, the input shaft may not be able to fully extend into the passenger compartment. There is a strong tendency to stand out.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a front vehicle body structure for an automobile that can more reliably prevent the booster from protruding into the passenger compartment in the event of a frontal collision.

(Means and effects for solving the problem) In order to achieve the above-mentioned object, the present invention focuses on the fact that there is a wheel apron panel equipped with a wheel house for front wheels in front of the dash panel, and the dash panel The booster is fixed to the front wheel house.

With this configuration, even if a rearward collision force acts on the booster in the event of a frontal collision, the force acting on the booster will first be directed to the wheel house (wheel apron panel). If the wheel house cannot support the collision force, it will be supported by the dash panel. That is, in the present invention, the rear collision force acting on the booster can be supported dually by the wheel house and the dash panel, whereas conventionally this collision force was supported only by the dash panel. This means that it is possible to more effectively prevent the 1st force device from protruding into the vehicle compartment.

(Example) Examples of the present invention will be described below based on the attached drawings.

In FIG. 1, an automobile 1 includes a floor panel 3 that constitutes the bottom wall of a passenger compartment 2. As shown in FIG. On this floor panel 3, from the front side to the rear side, the first row seats S1, the second row seats
A row seat S2 and a third row seat S3 are arranged, and a space behind the third row seat S3 is used as a luggage compartment X. The first row of seats S1 includes a driver's seat 4 and a passenger seat (not shown), which are independent on the left and right, and in the embodiment, the driver's seat 4 is located on the right side in the vehicle width direction.

A raised portion 6 is formed on the floor panel 3 only at the center portion in the vehicle width direction in the portion where the first row seat S1 is located. An engine 7 is disposed below this raised portion 6. This engine 7 is of a so-called vertical type with its crankshaft extending in the longitudinal direction of the vehicle body, and at its rear end is a power train system 8 consisting of a clutch, transmission, center differential, etc.! tied together. This power train system 8 connects the rear wheels via a rear propeller shaft 9.
Power is transmitted to the front propeller shaft 1
Power is transmitted to the front wheels 12 via 1. In this way, the automobile 1 is constructed as a four-wheel drive cab-over type (epox type).

The front end of the floor panel 3 is connected to a dash panel 21 that extends in the vehicle width direction and the vertical direction. This dash panel 21 becomes the front wall of the passenger compartment 2, and here,
In addition to the brake pedal 22, an accelerator pedal and a clutch pedal (not shown) are supported within the vehicle interior 2. The distance from the dash panel 3 to the front end of the vehicle body is made relatively small, and a brake pedal booster 23 is disposed in a small space Z formed in front of the dash panel 3.

As shown in FIG. 2, the left and right side walls of the small space Z are constituted by a pair of left and right wheel apron panels 24. This wheel apron panel includes a wheel house 25 for a front wheel that bulges inward of the vehicle body, and the front portion of this wheel house 25 is located forward of the dash panel 21. The booster 23 is fixed to the right wheel house 25 of the pair of left and right wheel houses 25 where the 1M transfer seat is located, that is, at the position shown in FIG. 2 Y.

3 and 4 regarding the fixing of the booster 23 to the wheel house 25 and the connection to the brake pedal 22.
This will be explained with reference to the figures.

First, the cowl box 26 connected to the dash panel 21 and its upper end is provided with a cowl box 26 located inside the vehicle interior 2.
A support bracket 27 is joined. The upper end of the brake pedal 22 is rotatably attached to the bracket 27 by a pin 28.

On the other hand, a support bracket 29 for a booster is arranged in the small space Z in front of the dash panel 21, and a mounting stay 30 connected to this support bracket 29 is attached to the wheel house 25 located in the small space Z. is joined to. The bracket 30 has a shape as shown in FIG.
The bin portion 31 of the bell crank 31 is attached to this bracket 30.
a is rotatably supported. This bottle part 31a is
It extends at right angles to the support pin 28 for the brake pedal. One arm portion 31b of such a bell crank 31 is connected to the upper end portion of the brake pedal 22 via a connecting rod 32 passing through the dash panel 21. Fixed. To explain this point in detail, the booster 23 is of a vacuum booster type, and is arranged so that its input/output shaft direction is in the vehicle width direction, and its input shaft 23a is connected to the bracket 2.
It extends to the 9th side.

The booster 23 has a plurality of attachment poles 23b that protrude in the direction in which the human power shaft 23a extends, and the booster 23 is seated on the right side of the vehicle body of the bracket 29 (left side in FIG. 4). It is fixed to the bracket 29 by the mounting bolt 23b and the nut 33 screwed into the mounting bolt 23b. That is, as shown in FIGS. 5 and 6, the bracket 29 has a through hole 34 for the mounting port 23b, and a valve portion 23C of the booster 23 (the part into which the input #123a is inserted). It has a through hole 35 of. And the bracket 29 is a booster! Since the width is smaller than the diameter of the seating surface for the booster 23, a large seating surface for the booster 23 is secured by also utilizing a cut-and-raised portion 29a formed by cutting and raising the side wall. Note that a notch formed as a result of forming the notch portion 29a is indicated by a reference numeral 29b.

Boost bag W fixed to bracket 29 as described above
123, the input shaft 23a is connected to the bell crank 31.
The second arm portion 31c is rotatably connected to the second arm portion 31c. Of course, a mask cylinder 36 connected to an output shaft (not shown) of the booster 23 is fixed to the booster 23.

In the above configuration, when the driver depresses the pedal portion 22a of the brake pedal 22, this operational force, that is, the depressing force, is transmitted to the input shaft 23a of the booster 23 via the connecting rod 32 and the bell crank 31. The pedal force is boosted by the booster 23 and transmitted to the master cylinder 36.

Although the embodiments have been described above, the booster 23 may be for a clutch pedal. Further, the booster 23 may be fixed to the wheel house 25 with its input/output shaft extended in the longitudinal direction of the vehicle body. However, as in the embodiment, this input/output shaft is extended in the vehicle width direction. It is preferable to extend the input/output shaft in order to prevent the input/output shaft from protruding into the vehicle interior, particularly in order to prevent the input/output shaft from protruding into the vehicle interior in the axial direction. Of course, the present invention also applies to the dash panel 2.
The present invention can be similarly applied to a type of automobile in which the engine is disposed in front of the vehicle.

(Effects of the Invention) As is clear from the above description, the present invention has an object to more reliably prevent a situation in which the booster, which is a relatively large member, protrudes into the vehicle interior in the event of a frontal collision. Can be done.

[Brief explanation of drawings]

FIG. 1 is a simplified side view showing an example of an automobile to which the present invention is applied. FIG. 2 is a front perspective view of the automobile of FIG. 1 showing the front part of the dash panel where the booster is arranged. FIG. 3 is an enlarged side view of the main part of FIG. 1. Fig. 4 is a front elevational view showing the booster and the wheel house portion,...7 Fig. 5 is a perspective view showing the bracket to which the booster is fixed. FIG. 6 is a plan sectional view showing a fixed state of the booster and the bracket. 2 car compartment 4: driver's seat 21: dash panel 22 brake pedal 23: booster 24: wheel apron panel 25: wheel house

Claims (1)

[Claims] (1) In front of the dash panel that makes up the front wall of the passenger compartment,
A wheel apron panel is provided with a wheel house for the front wheels, and a booster for boosting the operating force on the pedals arranged in the passenger compartment is fixed to the wheel house in front of the dash panel. An automobile front body structure characterized by: