JPH0710043A - Car body structure of automobile - Google Patents

Abstract

PURPOSE:To provide a car body structure of automobile, wherein the reduce of cost by decreasing makeup materials of a structural frame can be attempted in comparison with the conventional one, and the panel constitution is easy without deteriorating the section modulus of the structural frame even if the width of the car is small and also without thicking the board thickness. CONSTITUTION:A spare tire house part 4 is provided on a floor panel 2 on the lower side of a trunk, structural frames 5, 6 are respectively arranged on right and left both sides of the spare tire house part 4 along the car body longitudinal direction, and right and left both side surfaces 4a, 4b of the spare tire house part 4 and lower ends 5b, 6b of the structural frames 5, 6 are connected to each other, and the spare tire house part 4 is constituted as one part of the structural frames 5, 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile body structure.

[0002]

2. Description of the Related Art Conventionally, in a vehicle body structure of a hatchback type automobile 51 as shown in FIG. 5 or a notchback type automobile 61 as shown in FIG. 6, luggage compartments 52 and 62 are provided at the rear portion of the vehicle body. And the floor panels 53 and 63 below the luggage compartments 52 and 62 have spare tires 54 and 64.
Spare tire house parts 55 and 65 for accommodating are stored respectively. Then, on the left and right sides of the spare tire house parts 55, 65, as shown in FIGS. 7 and 8, the vehicle body structure frame 5 extending along the vehicle body front-rear direction.
6, 66 are arranged independently of each other with a space. The structural frames 56, 66 are formed in a substantially U-shaped cross section with the opening side facing upward, and the upper ends 56a, 6 fixed to the lower surfaces of the floor panels 53, 63.
6a is a joint flange bent outward at a right angle.

[0003]

However, when the conventional vehicle body structure described above is applied to an automobile of a narrow vehicle width, etc., as shown in FIGS. 9 and 10, the spare tire house portion 55, Due to the presence of 65, the structural frames 56 and 66 are limited to be widened in the width direction (width dimension W) or formed to be long in the vertical direction, so that the cross-section coefficient of the structural frames 56 and 66 cannot be made large. It had a drawback. For this reason, in the conventional vehicle body structure, it is necessary to use the structural frames 56 and 66 having a large plate thickness because the section modulus cannot be large, and accordingly, the input material of the structural frames 56 and 66 is increased. However, the cost will increase.

The present invention has been made in view of the above circumstances, and an object thereof is to reduce the cost by reducing the amount of material used for the structural frame as compared with the prior art and also for a vehicle having a narrow vehicle width. An object of the present invention is to provide a vehicle body structure of an automobile, which can easily form a panel without impairing the sectional modulus of the structural frame and increasing the plate thickness.

[0005]

In order to solve the above-mentioned problems of the prior art, in the present invention, a spare tire house portion is provided on the floor panel under the luggage compartment, and both sides of the spare tire house portion are provided. In a vehicle body structure in which structural frames are respectively arranged in the longitudinal direction of the vehicle body, the spare tire house part and at least one lower end part of the structural frame are coupled to each other, and the spare tire house part is structured as described above. It is configured as a part of the frame for use.

[0006]

In the vehicle body structure for an automobile according to the present invention, the spare tire house portion provided on the floor panel on the lower side of the luggage compartment and at least one lower end portion of the structural frame extending along the vehicle front-rear direction are connected to each other, Since the spare tire house part is configured as a part of the structural frame, the section modulus of the structural frame does not become small even in a car having a narrow vehicle width, and the structural frame having a thick plate is used. The rigidity of the vehicle body can be improved without using it.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the illustrated embodiments.

1 and 2 show an embodiment of a vehicle body structure of an automobile according to the present invention. In the figure, 1 is a luggage compartment provided at the rear of the vehicle body of an automobile, 2 is a floor panel disposed below the luggage compartment 1, and a spare tire 3 is provided at the center position of the floor panel 2 in the vehicle width direction. A spare tire house part 4 for storing is provided. The spare tire house portion 4 is formed by denting a part of the floor panel 2 toward the lower side of the vehicle body, and the size thereof allows the spare tire 3 to be housed and the depth thereof. Is set so that the stored spare tire 3 and the upper surface of the floor panel 2 are substantially flush with each other.

On both left and right sides of the spare tire house portion 4, structural frames 5 and 6 of the vehicle body are arranged along the longitudinal direction of the vehicle body. Moreover, the spare tire house part 4 and the structural frames 5 and 6 are coupled to each other by utilizing the shape of the spare tire house part 4, and the spare tire house part 4 forms a part of the structural frames 5 and 6. Is configured.

Therefore, the structural frames 5 and 6 are formed in a substantially L-shaped cross section, the upper end portions 5a and 6a are upper joint flanges bent outward at a right angle, and the lower end portions 5b and 6b. Is a lower joint flange that is bent downward along the side surface of the spare tire house portion 4. Thus, the structural frames 5 and 6 have upper ends 5a,
6a is fixed to the lower surface of the floor panel 2, and the lower end portion 5b,
6b are left and right side surfaces 4a, 4b of the spare tire house portion 4.
Are arranged so as to be fixed to each other.

In order to assemble the spare tire house portion 4 and the structural frames 5, 6 in such a vehicle body structure, first, the lower surface of the floor panel 2 and the upper end portions 5a, 6a of the structural frames 5, 6 are assembled. And lap each other, and the left and right side surfaces 4a, 4b of the spare tire house portion 4
And the lower ends 5b and 6b of the structural frames 5 and 6 are overlapped with each other. Then, if these overlapping portions are respectively joined by spot welding or the like, a rectangular cross section is formed by the spare tire house portion 4 and the structural frames 5 and 6, so that the spare tire house portion 4 is structurally connected to the structural frames 5 and 6. And the assembling work is completed (see FIGS. 1 and 2).

According to the vehicle body structure of this embodiment, since the spare tire house portion 4 is formed as a part of the structural frames 5 and 6, the structural frames 5 and 6 of the vehicle are narrow, especially in a narrow vehicle width. Since the section modulus is large, it is not necessary to use the thick structural frames 5 and 6 as in the conventional case. Further, as shown in FIG. 3, when the spare tire 3 is not housed in the spare tire house part 4, the space S corresponding to the spare tire house part 4 is provided by using this panel configuration. As a result, the capacity of the luggage compartment 1 can be greatly increased.

The embodiment of the present invention has been described above.
The present invention is not limited to the embodiments described above, and various modifications and changes can be made based on the technical idea of the present invention.

For example, in the above-described embodiments, the vehicle body structure of the present invention is applied to the structural frames 5 and 6 arranged on both the left and right sides of the spare tire house portion 4, but the present invention is applied to these structural frames 5. Spare tire house part 4 out of 6,
It is also effective if applied to only one side of. Further, in the above-described embodiment, the lower end portions 5b and 6b of the structural frames 5 and 6 are joined to the left and right side surfaces 4a and 4b of the spare tire house portion 4, but as shown in FIG. Even if the lower end portion 5b is not bent downward and is directly connected to the lower surface 4c of the spare tire house portion 4, the same effect can be obtained.

[0015]

As described above, in the vehicle body structure for an automobile according to the present invention, the spare tire house portion is provided on the floor panel under the luggage compartment, and the structural frames are provided on the left and right sides of the spare tire house portion in the vehicle longitudinal direction. Are arranged along each, and the spare tire house part and at least one lower end part of the structural frame are coupled to each other, and the spare tire house part is configured as a part of the structural frame. Compared with the conventional vehicle body structure, the amount of material used for the structural frame can be reduced, and the cost can be reduced. Moreover, when the vehicle body structure of the present invention is applied to a vehicle having a narrow vehicle width, the cross-sectional modulus of the structural frame is not impaired, and it is not necessary to increase the plate thickness of the structural frame. It is possible to realize a panel configuration and improve the rigidity of the vehicle body, which is economically advantageous. In addition, even if the storage portion for the spare tire is not provided in the corresponding portion of the floor panel, the capacity of the luggage compartment can be greatly increased by utilizing the panel configuration of the present invention.

[Brief description of drawings]

FIG. 1 is a perspective view showing the vicinity of a spare tire house portion of an automobile to which a vehicle body structure according to an embodiment of the present invention is applied.

FIG. 2 is a cross-sectional view showing the vicinity of a spare tire house portion as seen from the direction of arrow A in FIG.

FIG. 3 is a cross-sectional view showing a luggage compartment of an automobile to which the vehicle body structure described above in which a storage portion for spare tires is not provided is applied.

FIG. 4 is a cross-sectional view showing a combined structure of a spare tire house portion and a structural frame according to a modified example of the above embodiment.

FIG. 5 is a side view conceptually showing a hatchback type automobile to which a conventional vehicle body structure is applied.

FIG. 6 is a side view conceptually showing a notch-back type automobile to which a conventional vehicle body structure is applied.

FIG. 7 is a perspective view showing the vicinity of a spare tire house portion of an automobile to which a conventional vehicle body structure is applied.

FIG. 8 is a cross-sectional view showing the vicinity of a spare tire house portion as seen from the direction of arrow B in FIG.

FIG. 9 is a cross-sectional view showing the vicinity of a spare tire house portion of an automobile having a narrow vehicle width to which a conventional vehicle body structure is applied.

FIG. 10 is a cross-sectional view showing an enlarged part C in FIG.

[Explanation of symbols]

 1 Luggage compartment 2 Floor panel 3 Spare tire 4 Spare tire house 5,6 Structural frame

Claims (1)

[Claims] 1. A vehicle body structure for an automobile, wherein a spare tire house portion is provided on a floor panel below a luggage compartment, and structural frames are respectively arranged on both left and right sides of the spare tire house portion along a longitudinal direction of the vehicle body. A vehicle body structure for an automobile, characterized in that a spare tire house part and at least one lower end part of the structural frame are connected to each other, and the spare tire house part is configured as a part of the structural frame.