JPH07172351A - Lower car body structure for automobile - Google Patents

Abstract

PURPOSE:To provide a lower car body structure of an automobile which is structured in such a manner as to improve rigidity of a floor tunnel part. CONSTITUTION:In the lower car body structure of an automobile wherein a floor tunnel 2 part is arranged at the central part of a main floor panel 1 along the longitudinal direction of a car body and one of the the rear mounting brackets of right and left front seats is mounted on the floor tunnel part 2 part, a reinforcement 7 is disposed on the inner surface of the floor tunnel 2 part, on which one of the rear mounting brackets 5 of a front sheet is mounted, so that a closed section is formed between the main floor panels 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower body structure of an automobile capable of improving the rigidity of a floor tunnel portion.

[0002]

2. Description of the Related Art In a vehicle, as shown in FIG.
Floor tunnel 1 in the center of the main floor panel 100
01 is provided, and a shift lever 102 and a parking brake lever 103 are provided in the floor tunnel 101 portion. This parking brake lever 103
Is a floor tunnel 10 as shown in FIGS.
It is mounted on a box-type parking brake lever reinforcement 104 provided on the upper surface of No. 1 via a bolt 105 and a nut 106.

A step portion 101a is provided on both sides of the floor tunnel 101, and the indoor guide rails 108 of the left and right front seats 107 are provided on the step portion 101a.
A front seat inside bracket 109 for attaching the rear end portion is attached. Front seat 107
Secures the front side to the floor cross member and the back side via separate brackets.

On the inner surface of the floor tunnel 101,
A muffler mounting bracket 111 that supports the muffler 110 is attached.

In the above-mentioned prior art, a parking brake lever reinforcement 104 for reinforcing the parking brake lever 103, a front seat inside bracket 109, and a muffler mounting bracket 111 for supporting a muffler 110 are separately mounted.

[0006]

However, according to the above conventional technique, the parking brake lever reinforcement 104, the front seat inside bracket 109, and the muffler mounting bracket 111 are mounted on the floor tunnel 101, so that The rigidity of the tunnel 101 portion becomes insufficient. Since the parking brake lever reinforcement 104, the front seat inside bracket 109, and the muffler mounting bracket 111 are separately mounted, the cost of parts increases. Further, since the floor tunnel 101 receives an impact from the side surface, sufficient rigidity cannot be obtained.

An object of the present invention is to solve the above problems and to provide a lower body structure of an automobile capable of improving the rigidity of a floor tunnel portion.

[0008]

In order to solve the above problems, the present invention provides a floor tunnel portion in the center of a main floor panel along the front-rear direction of a vehicle body, and the floor tunnel portion is provided with rear seats for the left and right front seats. In a lower body structure of an automobile equipped with one of the side mounting brackets, a closed cross section is formed between the main floor panel and an inner surface of a floor tunnel portion provided with one of the rear mounting brackets of the front seat. This is due to the placement of lean reinforcement in the. Further, the present invention expands the lean force to the mounting portion of the parking brake lever,
There is a mounting portion for a parking brake lever on the lean force. Further, the present invention resides in that the muffler mounting attachment portion is attached to the lean reinforcement inside the floor tunnel portion having the closed cross section.

[0009]

The lean reinforcement is arranged on the inner surface of the floor tunnel portion provided with one of the rear mounting brackets of the front seat so as to form a closed cross section with the main floor panel. Then, the lean force is expanded to the mounting portion of the parking brake lever, and the mounting portion of the parking brake lever is provided in the lean force. Since the closed cross section is formed on the inner surface of the floor tunnel, the rigidity of the mounting portion of the rear mounting bracket of the front seat and the parking brake lever mounting portion is improved. Further, since the muffler mounting attachment portion is attached to the reinforcement inside the floor tunnel portion having the closed cross section, the rigidity of the muffler mounting attachment portion is improved. In this way, the rigidity of the floor tunnel against the impact from the side surface is improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. 1 to 4 show a lower body structure of an automobile according to the present invention. 1 to 4, reference numeral 1 denotes a main floor panel, and a floor tunnel 2 is provided at a central portion along the front-rear direction of the vehicle body.

The floor tunnel 2 has a cross-section hat type, and inside brackets 5 for fixing the rear end of the indoor slide rail 4 of the front seat 3 are attached to both side step portions 2a.

A parking brake lever 6 is provided on the upper surface of the floor tunnel 2, and the parking brake lever 6 is mounted on a parking brake lever reinforcement 7 provided on the back side of the floor tunnel 2. . An opening 8 is formed on the upper surface of the floor tunnel 2, and a parking stay 9 is fixed to the parking brake lever reinforcement 7 through a screw 10 through the opening 8. The parking brake lever reinforcement 7 is arranged so as to form a closed cross section with the floor tunnel 2.

Reference numeral 11 denotes a muffler passing through the inside of the floor tunnel 2, and the muffler 11 is supported via a muffler stay 12. The muffler stay 12 is fixed by a screw 13 to a parking brake lever reinforcement 7 having a closed cross section.

Next, the operation of the present invention having the above configuration will be described. A parking brake lever reinforcement 7 is arranged on the inner surface side of the floor tunnel 2 so as to correspond to the inside bracket 5 that fixes the rear end of the indoor slide rail 4 of the front seat 3. The parking brake lever reinforcement 7 is formed so as to form a closed cross section with the floor tunnel 2.

Since the parking brake lever 6 and the muffler 11 are attached to the parking brake lever reinforcement 7, a conventional parking brake lever reinforcement, a front seat inside bracket, and a muffler mounting bracket are provided. It is integrated and attached, and cost down can be achieved. Also, inside the floor tunnel 2, there is a parking brake lever reinforcement 7
Since the closed cross section is formed by, the rigidity can be improved against the impact from the side surface.

[0016]

As described above, according to the lower body structure of an automobile of the present invention, the following effects can be obtained. In Claim 1, a floor tunnel portion is provided along the front-rear direction of the vehicle body at the center of the main floor panel,
In the lower body structure of an automobile in which one of the left and right front seat rear mounting brackets is mounted on the floor tunnel portion, the main floor is attached to the inner surface of the floor tunnel portion where one of the front seat rear mounting brackets is provided. Since the reinforcement is arranged so as to form a closed cross section with the panel, the mounting strength of the rear mounting bracket of the front seat can be improved. In claim 2, since the lean force is expanded to the mounting portion of the parking brake lever and the parking brake lever mounting portion is provided in the lean force, the mounting strength of the parking brake lever can be improved. In the third aspect, since the muffler mounting attachment portion is attached to the lean reinforcement inside the floor tunnel portion having the closed cross section, the rigidity of the muffler mounting attachment portion can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a floor tunnel portion showing an embodiment of a lower body structure of an automobile according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

4 is a cross-sectional view taken along the line CC of FIG.

FIG. 5 is a perspective view showing a lower body structure of an automobile.

FIG. 6 is a perspective view showing a floor tunnel portion of a conventional automobile.

7 is a cross-sectional view taken along the line AA of FIG.

8 is a cross-sectional view taken along the line BB of FIG.

9 is a sectional view taken along line CC of FIG.

[Explanation of symbols]

 1 Main Floor Panel 2 Floor Tunnel 3 Front Seat 4 Slide Rail 5 Inside Bracket 6 Parking Brake Lever 7 Parking Brake Lever Lean Force 8 Opening 9 Parking Stay 10 Screw 11 Muffler 12 Muffler Stay 13 Screw

Claims (3)

[Claims] 1. A lower vehicle body structure of an automobile in which a floor tunnel portion is provided in a central portion of a main floor panel along a front-back direction of a vehicle body, and one of the left and right front seat rear mounting brackets is attached to the floor tunnel portion. An automobile having a lean reinforcement disposed on an inner surface of a floor tunnel portion provided with one of the rear side mounting brackets of the front seat so as to form a closed cross section with the main floor panel. Lower body structure. 2. The lower body structure of the automobile according to claim 1, wherein the lean force is expanded to a mounting portion of a parking brake lever, and the lean force is provided with a mounting portion of the parking brake lever. . 3. The lower vehicle body structure for an automobile according to claim 1, wherein the muffler mounting attachment portion is attached to a reinforcement inside the floor tunnel portion having the closed cross section.