JPH04252780A - Lower body construction for automobile - Google Patents

Abstract

PURPOSE:To improve rigidity of a deck part which has an opening part formed on the dash lower panel or the floor panel in the lower part of vehicle room of an automobile body, and swelled inside the vehicle room. CONSTITUTION:On the fringe 7a of an opening part 7 formed on a dash lower panel 2 and on the fringe 6a of an opening part 6 formed on a deck part 5, respective reinforcements 8, 9a, 9b are provided, and the reinforcement 9b is fixedly secured to a front frame 4 extended in the front and rear direction of a body. The opening parts 6, 7 are reinforced with respective reinforcements 8, 9a, 9b, strong shock applied on the deck part 5 at impulsion is supported with the front frame 4, and deformation and displacement of the deck part 5 is restrained.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a lower body structure of an automobile,
In particular, the present invention relates to a vehicle body structure having a deck portion near the bottom of a dash lower panel that opens toward the passenger compartment.

0002

[Prior Art] As a member constituting the lower part of the passenger compartment of an automobile body, there is a dash lower panel which constitutes the lower front part of the passenger compartment (including a part of the front part of the floor of the passenger compartment), and a part which constitutes the floor surface of the passenger compartment. There are floor panels, etc. Conventionally, there has been a vehicle in which a hollow deck portion that bulges inward into the vehicle interior is formed on the dash lower panel or floor panel, and the inside of this deck portion is used as a storage space.

[0003] As one aspect of such a car body structure, for example, as disclosed in Japanese Patent Application Laid-Open No. 63-240480, a deck portion that bulges toward the passenger compartment is formed on the floor panel, and the inside of this deck portion is used to accommodate the engine. In addition to being used as part of the storage space, there is also a deck part that has an opening that can be opened and closed so that maintenance and inspection of the engine can be performed from the passenger compartment side.

0004

[Problems to be Solved by the Invention] In a vehicle body structure equipped with a deck portion that bulges out toward the passenger compartment side as described above, by providing an opening in this deck portion, the storage space within the deck portion can be opened from the passenger compartment side. I am making it available.

[0005]By the way, it is conceivable that the rigidity of the deck itself will be weakened if an opening is provided in the deck, but since the deck bulges toward the passenger compartment as described above, it is difficult to prevent a car from colliding with the deck. It is desirable to maintain high rigidity of the deck even in vehicles with openings so that the deck does not deform as much as possible even when the vehicle body is subjected to a strong impact such as when the car body receives a strong impact.

In view of the above problems, the present invention makes it possible to maintain high rigidity of the deck portion even if an opening is provided in the hollow deck portion formed in the dash lower panel or floor panel that bulges toward the passenger compartment. The object of the present invention is to provide a lower body structure for an automobile.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the lower body structure of an automobile according to the present invention includes a dash lower panel constituting the lower front part of the vehicle interior, and a lower edge of the dash lower panel that is fixed to the lower edge of the dash lower panel. The dash lower panel or the floor panel has an opening facing toward the vehicle interior and bulges toward the vehicle interior. In the lower body structure of an automobile in which a hollow deck portion is formed, ◆ a reinforcement for reinforcing the opening is provided around the periphery of the opening of the deck portion; is fixed to the front frame directly or indirectly through another member.

[0008]

[Function] As described above, in the lower body structure of an automobile according to the present invention, the reinforcement provided around the periphery of the opening provided in the hollow deck portion that bulges toward the passenger compartment reinforces the opening. In addition to increasing the rigidity of the deck, this reinforcement is fixed to the front frame, so even if the deck receives a strong impact through the car body, such as during a car collision, the front frame will support the impact and the deck will deformation and displacement can be effectively suppressed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the lower body structure of an automobile according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a deck portion of a lower body structure of an automobile according to an embodiment of the present invention.
) is an overall perspective view, Figure (b) is a partially enlarged view of Figure (a), and Figure 2 is a cross-sectional view of the deck section, Figure (a) is a partial enlarged view of Figure (a).
is a sectional view taken along line IIa-IIa in FIG.
b) is a sectional view taken along line IIb-IIb in FIG. 1, FIG. 4(c) is a sectional view taken along line IIc-IIc in FIG. FIG. 1 is a perspective view showing the overall structure of a lower vehicle body structure of an automobile according to an embodiment of the present invention.

As shown in FIG. 4, the lower body structure of the automobile according to the present embodiment includes a dash lower panel 2 constituting the lower front part of the vehicle interior of the vehicle body 1, a floor panel 3 constituting the front part of the floor of the vehicle interior, and a floor The vehicle includes a front frame 4 extending in the longitudinal direction of the vehicle body and forming a frame of the panel 3.

The dash lower panel 2 and the floor panel 3 are welded to each other along a joining line 2a extending in the vehicle width direction at the lower edge of the dash lower panel 2 so that their edges overlap vertically. A front up frame 4a extending in the longitudinal direction of the vehicle body is welded to the upper part of the frame 4 along the front frame 4. A hollow engine deck portion 5 that bulges toward the passenger compartment is formed approximately at the center of the dash lower panel in the vehicle width direction.
The engine deck portion 5 is provided with an opening 6 facing rearward toward the passenger compartment side.

As shown in FIG. 3, an opening 7 is formed approximately in the center of the dash lower panel 2, and the engine deck portion 5 is welded to the peripheral edge 7a of this opening 7. A part of the engine installed on the back side of the dash lower panel 2 is housed in the engine deck section 5, and inspection and maintenance of the engine can be performed from the passenger compartment side through an opening 6 provided in the engine deck section 5. be able to.

As shown in FIGS. 1 and 3, a dash lower reinforcement 8 is welded to the peripheral edge 7a of the opening 7 of the dash lower panel 2 from the back side of the dash lower panel 2. Engine deck reinforcements 9a and 9b are welded to the peripheral edge 6a of the opening 6 from the back side of the engine deck portion 5, respectively. In addition, each reinforcement 8, 9a, 9b
are welded together as shown in Figure 1(b). As shown in FIGS. 2(a) to 2(c), each reinforcement 8, 9a, 9b is connected to the opening periphery 6a of the engine deck portion 5 or the dash lower panel 2.
It forms a closed cross section with the opening periphery 7a. Also, Figure 1 (a
), the engine deck reinforcement 9b is welded to the front up frame 4a.

With the above structure, the openings 6a and 7a of the engine deck section 5 are connected to the respective reinforcements 8 and 9a.
, 9b, and is fixed to the front frame 4 via the front up frame 4a, increasing its rigidity.

Although the lower body structure of an automobile according to the present invention has been described above based on one embodiment, the lower body structure of an automobile according to the present invention is not limited to this embodiment. For example, in the embodiment described above, the engine deck section 5 that houses part of the engine has been described as the deck section, but the deck section of the present invention is not limited to one that houses the engine. Further, it is also possible to optionally attach a cover to the opening provided in the deck portion for opening and closing this opening.

Further, in the embodiment described above, the engine deck portion 5 is formed on the dash lower panel 2, but even if the deck portion is formed on the floor panel 3, it may be formed on the dash lower panel 2 and the floor panel 3. Even if
Furthermore, it may be formed across the dash lower panel 2 and the floor panel 3.

Furthermore, in the embodiment described above, the reinforcements 8, 9a, 9b and the engine deck portion 5 are welded together, but they may also be fixed to each other by other methods such as bolting, or reinforcement may be used. It is also possible to use other methods that do not form a closed cross section.

[0019]

According to the lower body structure of an automobile according to the present invention, the opening is formed around the opening provided in the hollow deck portion formed in the dash lower panel or floor panel and bulging toward the passenger compartment. There is a reinforcing reinforcement around the front frame, and this reinforcement is fixed to the front frame, so even if the deck receives a strong impact such as during a car collision, the impact will be transferred to the front of the vehicle through the reinforcement. Since deformation and displacement of the deck part can be suppressed by the support of the frame, it is possible to maintain high rigidity of the deck part even if an opening is provided in the deck part.

[Brief explanation of the drawing]

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

FIG. 2 is a sectional view of a deck portion of a lower vehicle body structure of an automobile according to an embodiment of the present invention.

FIG. 3 is a perspective view showing constituent members of a deck portion of a lower vehicle body structure of an automobile according to an embodiment of the present invention.

FIG. 4 is a perspective view showing the overall configuration of the lower body structure of an automobile according to an embodiment of the present invention.

[Explanation of symbols]

1 Car body 2 Dash lower panel 3 Floor panel 4 Front frame 5 Deck section 6,7 Opening 6a, 7a Opening periphery

Claims (1)

[Claims] 1. A dash lower panel that constitutes the lower front part of the vehicle interior of a vehicle body, a floor panel that is fixed to the lower edge of the dash lower panel and constitutes the front part of the floor of the vehicle interior, and a front frame that constitutes the frame of the floor panel. A lower body structure for an automobile, wherein the dash lower panel or the floor panel is formed with a hollow deck portion that bulges toward the vehicle interior and has an opening facing toward the vehicle interior.
A lower body structure for an automobile, characterized in that a reinforcement for reinforcing the opening is provided around the opening of the deck portion, and the reinforcement is fixed to the front frame. .