JP2000016348A - Floor structure of vehicle body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the plane rigidity of a floor, and to prevent cracks or spot peeling caused by the stress concentration. SOLUTION: In this floor structure, a lower surface of a floor panel is supported by a pair of right and left frames, and a cross member for supporting suspension is arranged between frames. A bead 10b is formed on the floor panel 4 from the position of the frame 5 to the cross member 9 for supporting suspension.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor structure of a vehicle body employing a monocoque or semi-monocoque structure.

[0002]

2. Description of the Related Art In a vehicle employing a monocoque or semi-monocoque structure as a vehicle body structure, a lower surface of a rear floor panel may be reinforced by a frame in order to reinforce a rear floor portion on which a rear seat is mounted. Usually, the rear floor panel is welded to a pair of left and right frames, or the rear floor panel is welded to the frame via an extension. In this case, in order to compensate for the insufficient rigidity of the floor, it is necessary to dispose a cross member that connects the pair of left and right frames.

FIGS. 5 to 7 show the structure of a conventional rear floor portion. A pair of left and right frames 101 are disposed on the lower surface of a rear floor panel 100, and a cross member is provided between the frames 101. FIG. They are connected at 102. In the middle of these frames 101, there is provided an inclined surface 103 facing upward toward the rear of the vehicle body, and a suspension supporting cross member 105 for supporting a suspension support bracket 104 between the frames 101 on the rear side of the inclined surface 103. Are arranged.

[0004] The rear floor panel 100 is provided with a plurality of ribs 106 along the front-rear direction of the vehicle body, on which a rear seat or the like is mounted.

[0005]

As described above, in the conventional body floor structure, the frame 101 and the cross member 1 are not provided.
02, particularly at the joint with the suspension supporting cross member 105, a large amount of stress is concentrated.
There was a risk that cracks, spot welding peeling, etc. might occur.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a floor structure of a vehicle body which solves the above problems, improves the surface rigidity of the floor, and can prevent cracks and spot peeling due to stress concentration.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a vehicle body floor in which a lower surface of a floor panel is supported by a pair of left and right frames and a suspension supporting cross member is disposed between the frames. In the structure, a bead is formed on the floor panel from the frame position to the suspension supporting cross member.

Since the beads are formed on the floor panel from the frame position to the suspension supporting cross member, the rigidity of the joint can be improved.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 4, reference numeral 1 denotes a vehicle body of a semi-cab-over type vehicle.
A rear floor panel 4 having a step 3 formed at a position corresponding to the rear seat 2 is provided. As shown in FIGS. 2 and 3, a pair of left and right frames 5 are provided on the lower surface of the rear floor panel 4, and a slope 6 is provided in the middle of the frame 5 at a position corresponding to the step 3. Have been. A plurality of cross members 7 are bridged and joined between the frames 5, and a suspension supporting cross member 9 for supporting a suspension supporting bracket 8 is disposed on the rear side of the frame 5. .

On the plate surface of the rear floor panel 4, a plurality of beads 10 are provided at regular intervals in the width direction of the vehicle body along the longitudinal direction of the vehicle body. A bead 10a provided on the frame 5 among these beads 10 has a sub-bead 10 along the upper side of the suspension supporting cross member 9.
b is provided in a direction orthogonal to the bead 10a.
Reference numeral 11 denotes a silencer seat mounted on the rear floor panel 4. The silencer seat 11 has cutouts 11a on both sides in the vehicle longitudinal direction. By engaging the notch 11a with the sub-bead 10b, the silencer sheet 11 can position the silencer sheet 11 and prevent displacement.

According to the above configuration, since the sub-bead 10b is provided so as to straddle the joint of the suspension supporting cross member 9 on the bead 10a provided on the frame 5, the sub-bead 10b is provided between the frame 5 and the suspension supporting cross member 9. Concentration of stress on the joint can be prevented.

It should be noted that the present invention is not limited to the above-described embodiment, but can be implemented with appropriate changes within a scope that does not change the gist of the present invention. For example, the length and width of the sub-bead 10b can be set arbitrarily. When the silencer sheet 11 is not used, the bead 10a and the sub-bead 10b can be used with the upper side having a concave shape.

[0014]

As described above, the vehicle body floor structure according to the present invention has the following effects. In a floor structure of a vehicle body in which a lower surface of a floor panel is supported by a pair of left and right frames and a suspension supporting cross member is disposed between the frames, a bead is formed on the floor panel from the frame position to the suspension supporting cross member. Therefore, it is possible to prevent concentration of stress on the joint between the frame and the suspension supporting cross member. Therefore, cracks and spot peeling due to stress concentration can be prevented. In a vehicle body floor structure in which a lower surface of a floor panel is supported by a pair of left and right frames and a suspension supporting cross member is disposed between the frames, a plurality of beads are formed on the floor panel along a longitudinal direction of the vehicle. And
Since the sub-bead is formed along the suspension supporting cross member from the bead formed at the frame position, it is possible to prevent concentration of stress on the joint between the frame and the suspension supporting cross member. Therefore,
Cracks and spot peeling due to stress concentration can be prevented. Since the cutouts engaging with the sub-beads are formed on both sides of the silencer sheet placed on the floor panel, the silencer sheet can be easily positioned.

[Brief description of the drawings]

FIG. 1 is a side view showing a vehicle to which a floor structure of a vehicle body according to an embodiment of the present invention is applied.

FIG. 2 is a perspective view showing a floor structure of the vehicle body shown in FIG. 1;

FIG. 3 is a sectional view taken along line CC of FIG. 2;

FIG. 4 is a sectional view taken along line DD of FIG. 3;

FIG. 5 is a perspective view showing a floor structure of a conventional vehicle body.

FIG. 6 is a sectional view taken along line AA of FIG. 5;

FIG. 7 is a sectional view taken along the line BB of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Rear seat 3 Step part 4 Rear floor panel (floor panel) 5 Frame 6 Slope part 7 Cross member 8 Suspension support bracket 9 Suspension support cross member 10, 10a Bead 11 Silencer seat 11 10b Sub-bead (bead)

Claims (3)

[Claims] In a floor structure of a vehicle body in which a lower surface of a floor panel is supported by a pair of left and right frames and a suspension supporting cross member is disposed between the frames, a suspension supporting cross is provided on the floor panel from the frame position. A floor structure of a vehicle body, wherein a bead is formed between members. 2. A vehicle body floor structure in which a lower surface of a floor panel is supported by a pair of left and right frames and a suspension supporting cross member is disposed between the frames, wherein the floor panel extends along the longitudinal direction of the vehicle body. A floor structure for a vehicle body, wherein a plurality of beads are formed, and a sub-bead is formed from a bead formed at the frame position along a suspension supporting cross member. 3. The floor structure of a vehicle body according to claim 1, wherein notches are formed on both sides of the silencer seat mounted on the floor panel to engage with the sub-beads.