JPH0536792Y2 - - 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. 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, these two are joined and fixed, and the side sill outer panel is This is a lower body structure with a side sill reinforcement placed between the side sill inner panel and the side sill inner panel.

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 uses side sill reinforcement to form a plurality of closed sections separate from the side sill closed sections in the area where the center pillar's inward falling load acts, thereby improving the connection between the center pillar and the side sills. The purpose of the present invention is to provide a lower body structure for a vehicle that can improve rigidity.

(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. A lower body structure of a vehicle comprising a panel and a side sill outer panel, which are joined and fixed to the outside lower part of the side sill extending in the longitudinal direction of the vehicle body, and a side sill reinforcement is arranged between the side sill inner panel and the side sill outer panel. The side sill reinforcement has a plurality of convex portions that abut at least one of the inner surface of the side sill inner panel and the inner surface of the side sill outer panel, and a plurality of recessed portions spaced apart from the inner surface of the panel, which act when the door is closed. Alternately and continuously formed in the longitudinal direction of the vehicle body over the entire area of the inward falling load, joining the plurality of recesses to the inner surface of the panel, and forming closed cross sections between the plurality of recesses and the inner surface of the panel, respectively. The lower body structure of the vehicle is characterized by:

(Effects of the invention) According to this invention, at the joint between the center pillar and the side sill where the inward falling load acts when the door is closed, the side sill reinforcement has recesses and protrusions over the above-mentioned inward falling load action area. The plurality of convex portions were joined to the inner surface of the side sill inner panel or the side sill outer panel, and a plurality of closed cross sections were formed between the plurality of concave portions and any of the above panels. It has sufficient strength against inward falling loads, and has the effect of significantly improving the bending and torsional rigidity of the lower vehicle body structure.

(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-described 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.

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 made to correspond to the external shape of the side sill outer panel 4 and extends to its outer lower end.
This extending portion 7b covers the outer surface of the side sill outer panel 4, and also 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 interior, and the above-mentioned reinforcing member 9 is bonded and disposed within this recess 14, as shown in FIG. , closed section 15,1
5, and as shown in FIG. The closed cross sections 15, 15 of the lower vehicle body structure are made substantially uniform so as to have sufficient strength against loads caused by opening and closing of doors, etc., and to improve the bending and torsional rigidity of the lower vehicle body structure.

Moreover, as shown in FIG. 9, the side sill reinforcement 5 has a plurality of convex portions 16b that contact the inner surface of the side sill inner panel 3 and a plurality of recessed portions that are spaced apart from the inner surface of the side sill inner panel 3. The concave and convex portions 16 are formed alternately and continuously in the longitudinal direction of the vehicle body over the entire area of the inward tilting load that is applied when the load is applied. , a plurality of closed cross sections H... are formed between the plurality of recesses described above and the inner surface of the side sill inner panel 3.

In this way, when a plurality of closed cross sections H are formed by joining the above-mentioned uneven portions 16 over the entire area of the joint between the center pillar 6 and the side sill 2 where the inward tilting load of the center pillar 6 acts, Since the reinforcing rigidity can be significantly improved, the structure has sufficient strength to withstand the loads caused by door opening/closing, etc., and the bending and torsional rigidity of the lower vehicle body structure can be significantly improved.

FIG. 10 shows another embodiment, in which, in addition to the structure shown in FIG. 9, an uneven portion 17 extending in the longitudinal direction of the vehicle body is also formed on the side sill outer panel 4, and a plurality of protrusions 17a... ...(outward convex portion) is bonded and fixed to the inner surface of the center pillar outer panel 7 as a facing member, and the plurality of recessed portions 17b
The recessed portion 16a of the uneven portion 16 in the above-mentioned side sill reinforcement 5 with ... as an opposing member
In combination with the plurality of closed cross sections H... described above, another plurality of closed cross sections J..., K... are formed.

FIG. 11 shows still another embodiment, in which a plurality of convex portions 18a abut against the inner surface of the side sill outer panel 4 over the entire area of the inward falling load in the side sill reinforcement 5, and a plurality of convex portions 18a are spaced apart from the inner surface of the side sill outer panel 4. A plurality of concave portions are alternately and continuously formed in the longitudinal direction of the vehicle body to constitute a concave and convex portion 18a, and the plurality of convex portions 18a described above are joined to the inner surface of the side sill outer panel 4,
A closed cross section L... is formed between the plurality of recesses described above and the inner surface of the side sill outer panel 4.

FIG. 12 shows still another embodiment, in which a plurality of parts protrude outward from the center of the side sill closed section and abut against the inner surface of the side sill outer panel 4 over the entire area of the inward falling load in the side sill reinforcement 5 described above. A convex portion 19a and a plurality of convex portions 19b protruding toward the inside of the vehicle from the central portion of the side sill closed cross section and abutting the inner surface of the side sill inner panel 3 are alternately and continuously formed in the longitudinal direction of the vehicle body,
For the convex portion 19a on one side, the convex portion 19b on the other side is configured as a concave portion, and for the convex portion 19b on the other side, the concave/convex portion 19 is configured such that the convex portion 19a on one side is configured as a concave portion. , the convex portion 19a on one side is joined to the inner surface of the side sill outer panel 4, and the convex portion 19b on the other side is joined to the inner surface of the side sill inner panel 3, and each concave portion in the above-mentioned concave and convex portion 19 is connected to each panel 3, 4. Closed cross sections N..., M... are formed between them.

FIG. 13 shows still another embodiment, in which uneven portions 20, which extend in the longitudinal direction of the vehicle body, are provided throughout the areas where the center pillar outer panel 7, the side sill outer panel 4, and the side sill reinforcement 5 are subjected to inward tilting loads, respectively. 21, 22, and the concave portion 20b of the concave and convex portion 20 toward the vehicle inside is formed on the side sill outer panel 4 as the opposing member, and the convex portion 21a of the concave and convex portion 21 toward the vehicle exterior is formed on the center pillar outer panel 7 as the opposing member. Convex portion 21 toward the inside of the vehicle
b are respectively bonded and fixed to the side sill reinforcement 5 as a facing member, the recess 22a of the above-mentioned uneven portion 22 is connected to the side sill outer panel 4 as the facing member, and the protrusion 22b toward the inside of the vehicle is connected to the side sill inner as the facing member. A plurality of closed cross sections P are each connected and fixed to the panel 3...
..., Q..., R... are formed.

As described above, even with the configuration shown in FIGS. 10 to 13, the functions and effects substantially the same as those of the first embodiment described above are obtained. Identical parts 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. 13 is a sectional view showing still another embodiment of the lower body structure of a vehicle. FIG. 2... Side sill, 3... Side sill inner panel, 4... Side sill outer panel, 5... Side sill reinforcement, 6... Center pillar, 7... Center pillar outer panel, 8...
Center pillar inner panel, 16, 18, 19,
22... Uneven portion, H, L, M, N, R... Closed cross section, 16b... Convex portion.

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 vehicle body structure for a vehicle in which a side sill reinforcement 5 is provided between a side sill inner panel 3 and a side sill outer panel 4, the side sill reinforcement 5 is connected and fixed to the outside lower part of a side sill 2 extending in the direction, For forcement 5,
A plurality of convex portions 16b that come into contact with at least one of the inner surface of the side sill inner panel 3 and the inner surface of the side sill outer panel 4 and a plurality of recessed portions spaced apart from the inner surface of the panel are provided in the entire area of the inward tilting load that is applied when the door is closed. The lower body of the vehicle is formed alternately and continuously in the longitudinal direction of the vehicle body, and the plurality of convex portions 16b are joined to the inner surface of the panel, and a closed cross section H is formed between the plurality of concave portions and the inner surface of the panel. structure.