JPH0536791Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to, for example, a lower body structure of a vehicle including a pillarless type center pillar whose upper end extends to the belt line.

(Prior Art) Conventionally, the lower body structure of the above-mentioned vehicle is as follows:
For example, there is a structure described in JP-A-61-44076.

In other words, the pillar outer panel and the pillar inner panel form a pillar-less type center pillar with a closed cross-section structure whose upper end extends to the belt line, while side sills are fixed to both sides of the vehicle floor and extend in the longitudinal direction of the vehicle body. However, this side sill is formed of a side sill outer panel and a side sill inner panel, and for the purpose of improving reinforcement rigidity, the above-mentioned pillar outer panel is extended to the outer lower part of the side sill outer panel, and these two are bonded and fixed to the lower body structure. .

However, such a conventional structure has the following problems.

In other words, the connection portion between the center pillar and the side sill is subject to the inward collapse load stress caused by the opening/closing operation of the door, etc., but there is a problem in that the reinforcement rigidity of the connection portion is not sufficient.

(Purpose of the invention) This invention aims to improve the rigidity of the connection between the center pillar and the side sill by using a unique structure that forms multiple types of closed cross sections in the entire area where the center pillar's inward tilting load acts. The purpose is to provide the lower body structure of vehicles.

(Structure of the invention) In this invention, a pillar outer panel and a pillar inner panel form a center pillar with a closed cross-section structure extending in the vertical direction of the vehicle body, and at least one of the pillar outer panel and the pillar inner panel is connected to the side sill inner panel. The side sill includes a panel and a side sill outer panel and extends to the outer lower part of the side sill extending in the longitudinal direction of the vehicle body to form an extension part,
A lower vehicle body structure of a vehicle in which the extending portion is fixed to the outer side of the side sill, and a reinforcing member is provided on the indoor side of the center pillar and connects the floor panel and the center pillar inner panel, A first closed section is formed between the reinforcing member and the side sill inner panel, and a side sill reinforcement extending in the longitudinal direction of the side sill is provided between the side sill inner panel and the side sill outer panel of the side sill; An uneven portion extending in the longitudinal direction of the vehicle body is formed in at least the side sill outer panel in the entire area of the inward falling load, and the uneven portion is joined and fixed to the extending portion and the side sill reinforcement to form a plurality of second side sill reinforcements. The present invention is characterized by a lower body structure of a vehicle having a closed cross section.

(Effect of the invention) According to this invention, the connection portion between the center pillar and the side sill on which the center pillar's inclination load acts is provided with the first closed section formed by both the above-mentioned reinforcing member and the side sill inner panel, and the above-mentioned Since the second closed cross section is formed by joining the uneven parts of the lower body, it has sufficient strength against the inward tilting load caused by door opening and closing, etc., and significantly improves the bending and torsional rigidity of the lower car body structure. There is an effect that can be done.

(Example) An example of this invention will be described in detail below based on the drawings.

The drawings show the lower body structure of a vehicle, and in FIGS. 1 to 3, side sills 2 extending in the longitudinal direction of the vehicle body are joined to both left and right sides of a floor panel 1.

The above-mentioned side sill 2 includes a side sill inner panel 3, a side sill outer panel 4, and a side sill reinforcement 5 interposed between these panels 3 and 4 and extending in the longitudinal direction of the side sill 2.

A center pillar 6 is fixed to the above-mentioned side sill 2 and extends in the vertical direction of the vehicle body from the side sill 2 to the belt line.

As shown in FIGS. 4 to 8, the center pillar 6 has a closed cross-sectional structure, and includes a center pillar outer panel 7, a center pillar inner panel 8, and a reinforcing member 9, which will be described later. The joining flange parts 7a and 8a of both panels 7 and 8 are joined to each other, and the lower part of the center pillar outer panel 7 is extended to the outer lower end of the side sill outer panel 4 in accordance with the external shape of the side sill outer panel 4, and this extending part 7b is formed. covers the outer surface of the side sill outer panel 4, and connects both 4 and 7b to each other.

Also provided is a reinforcing member 9 whose lower end is fixed to the floor panel 1 and whose upper end is fixed to the center pillar inner panel 8, and whose side cross section is substantially doglegged.

This reinforcing member 9 includes a lower flange 10 joined to the floor panel 1 and a side sill inner panel 3.
and side flanges 11, 11 joined to the joining flange portion 7a of the center pillar outer panel 7,
This is a reinforcing plate in which an upper flange 12 joined to the lower end of the center pillar inner panel 8 and two gate-shaped ribs 13, 13 extending in the vertical direction are integrally formed.

By the way, the above-mentioned reinforcing member 9 and side sill 2
As shown in FIGS. 2 and 9, the overlapping portion where the side sill inner panels 3 and 3 overlap each other is
The side sill inner panel 3 is recessed to form a recess 14 that opens inward to the vehicle body, and the above-mentioned reinforcing member 9 is bonded and disposed within this recess 14 as shown in FIG. Then, the first
As shown in FIG. The first closed cross section 15, 15 between the panel 3 is made substantially uniform to have sufficient strength against the inward tilting load caused by door opening/closing, etc., and to improve the bending and torsional rigidity of the lower vehicle body structure. It is configured as follows.

Moreover, as shown in FIG. 9, in the entire area of the side sill outer panel 4 where the inward tilting load acts, there are uneven portions 16 extending in the longitudinal direction of the vehicle body.
A plurality of convex portions 16a of the uneven portion 16 that protrude outward from the vehicle body are bonded and fixed to the inner surface of the extending portion 7b of the center pillar outer panel 7 as an opposing member, and a plurality of concave portions 16b are formed. A plurality of second closed cross sections H..., J... are bonded and fixed to the side sill reinforcement 5 as an opposing member.
... are formed respectively.

In this way, the first closed section 15 formed by both the above-mentioned reinforcing member 9 and the side sill inner panel 3 is formed at the connection part between the center pillar 6 and the side sill 2, on which the inward tilting load of the center pillar 6 acts. A plurality of second closed cross sections H by joining the uneven portions 16...
..., J..., it is possible to sufficiently improve the reinforcement rigidity, so it has sufficient strength against the inward falling load caused by door opening and closing, etc., and greatly increases the bending and torsional rigidity of the lower car body structure. This has the effect of making it possible to make significant improvements.

FIG. 10 shows another embodiment of the lower body structure of the vehicle. In addition to the structure shown in FIG.
A plurality of convex portions 17a of the uneven portion 17 protruding outward from the vehicle body are bonded and fixed to the side sill reinforcement 5 as an opposing member, and a plurality of recesses 17b are formed as an opposing member. are bonded and fixed to the inner surface of the reinforcing member 9 to form a plurality of third closed cross sections K and L, respectively.

FIG. 11 shows still another embodiment of the lower body structure of the vehicle. In addition to the structure shown in FIG. 10, an uneven portion 18 extending in the longitudinal direction of the vehicle body is also formed on the extending portion 7b of the center pillar outer panel 7. This uneven portion 1
The above-mentioned convex portion 16 of the side sill outer panel 4 uses the plurality of concave portions 18b... in the side sill outer panel 4 as an opposing member.
a... to form a plurality of closed cross sections M....

FIG. 12 shows still another embodiment of the lower body structure of the vehicle, in which the center pillar outer panel 7, the side sill outer panel 4, and the side sill reinforcement 5 have uneven portions 18, 16 extending in the longitudinal direction of the vehicle body, respectively. 19, and the uneven portion 1
8 to the side sill outer panel 4 as a facing member, the convex part 16a of the uneven part 16 to the center pillar outer panel 7 as a facing member, and the recess 16b to the side sill reinforcement 5 as a facing member. Furthermore, a plurality of closed cross sections M, N, and P are formed by bonding and fixing the convex portion 19a of the above-mentioned uneven portion 19 to the side sill outer panel 4 as an opposing member, and the recess 19b to the side sill inner panel 3 as an opposing member. ing.

In this way, even with the configuration shown in FIGS. 10, 11, and 12, substantially the same operation and effect as in the first embodiment described above can be achieved.
In the figure, the same parts as in FIG. 9 are given the same numbers and symbols, and detailed explanation thereof will be omitted.

It goes without saying that various modified structures of the present invention may be devised in addition to the above-mentioned embodiments.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, in which Fig. 1 is a side view showing the lower body structure of a vehicle, Fig. 2 is a sectional view taken along line A-A in Fig. Right side view, Figure 4 is a sectional view taken along line B-B in Figure 1, Figure 5
The figure is a sectional view taken along the line C-C in Figure 1, and Figure 6 is a cross-sectional view taken along the line C-C in Figure 1.
A sectional view taken along the line D-D in the figure, and FIG. 7 is an E--
8 is a sectional view taken along the line FF in FIG. 1, FIG. 9 is a sectional view taken along the line GG in FIG. 2,
FIG. 10 is a sectional view showing another embodiment of the lower body structure of a vehicle, FIG. 11 is a sectional view showing still another embodiment of the lower body structure of a vehicle, and FIG. 12 is a sectional view of another embodiment of the lower body structure of a vehicle. FIG. 7 is a sectional view showing another embodiment. 2... Side sill, 3... Side sill inner panel, 4... Side sill outer panel, 5... Side reinforcement, 6... Center pillar, 7... Center pillar outer panel, 8... Center pillar inner panel, 9... Reinforcement member, 15
...First closed cross section, 16... Uneven portion, H, J...
Second closed section.

Claims (1)

[Scope of claims for utility model registration] Pillar outer panel 7 and pillar inner panel 8
A center pillar 6 with a closed section structure extending in the vertical direction of the vehicle body is formed, and at least one of the pillar outer panel 7 and the pillar inner panel 8 is provided with a side sill inner panel 3 and a side sill outer panel 4 to form a center pillar 6 with a closed cross-section structure extending in the vertical direction of the vehicle body. A lower body structure of a vehicle, in which an extending portion 7b is formed by extending to the outer lower part of the side sill 2 extending in the direction, and the extending portion 7b is bonded and fixed to the outer portion of the side sill 2, and the chamber of the center pillar 6 is A reinforcing member 9 located on the inside and connecting between the floor panel 1 and the center pillar inner panel 8 is provided, and a first closed section 15 is formed between the reinforcing member 9 and the side sill inner panel 3. Side sill inner panel 3 of the above side sill 2
A side sill reinforcement 5 extending in the longitudinal direction of the side sill 2 is provided between the side sill outer panel 4 and the side sill outer panel 4, and at least the side sill outer panel 4 has an uneven portion extending in the longitudinal direction of the vehicle body in the entire area of the inward falling load. 16
A lower body structure for a vehicle, in which a plurality of second closed sections H and J are formed by bonding and fixing the uneven portion 16 to the extending portion 7b and the side sill reinforcement 5.