JPH0692266A - Lower body structure of automobile - Google Patents

Abstract

PURPOSE:To provide automobile lower body structure improving the rigidity of the body side fitting part of a trailing link and enabling the effective use of a space adjacent to the body width direction inner side of the above- mentioned fitting part while being able to cope with the automation of the fitting work of the trailing link to the body side. CONSTITUTION:The lower body of an automobile is provided with a connecting plate with one end part 26a jointed to a side sill 22 and with the other end part 26b jointed to a side frame 26 so as to connect the side sill 22 and the side frame 26 to each other. The other end part 28a of a trailing link 28 is then fitted to the lower face of the connecting plate from the lower side through a supporting member 30 for supporting the other end part 28a rotatably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower vehicle body structure of an automobile, and more particularly to a structure for mounting a trailing link on the vehicle body side.

[0002]

2. Description of the Related Art FIGS. 7A and 7B are views showing a structure for mounting a trailing link on a vehicle body side in a conventional vehicle lower body structure. FIG. 7A is a perspective view and FIG. 7B is a sectional view. . Figure 7
As shown in (b), at the end of the rear floor panel 2 in the vehicle width direction, a side sill 4 (only the inner panel of the side sill is shown in the figure) extending in the vehicle front-rear direction (direction perpendicular to the plane of the drawing). A side frame 6 that is joined and that forms a closed cross section with the rear floor panel 2 and the side sill 4 extends substantially parallel to the side sill 4 inside the side sill 4 in the vehicle width direction.

As shown in FIG. 7, conventionally, one end portion 8a of the trailing link 8 is a space portion of a mounting bracket 10 having a U-shaped cross-section in which the one end portion 8a is joined to the side frame 6.
After being inserted into the vehicle 10a, the bolt 12 is pierced through the side walls 10b and 10c of the bracket member 10 and the shaft hole 14 formed in the one end 8a of the trailing link 8 from the inside in the vehicle width direction, and the nut 16 and the screw 16 are screwed. It was generally attached to the vehicle body side by matching.

Although the side sill 6 is joined to the side sill 4 in FIG. 7, a structure in which the side sill and the side frame are arranged at a predetermined distance is also common.

[0005]

The trailing link mounting structure in the conventional vehicle lower body structure described above has the following problems. First, since the bolt 12 that pivotally supports the one end 8a of the trailing link 8 is inserted from the vehicle width direction inner side, the space adjacent to the vehicle body side mounting position of the trailing link 8 on the vehicle width direction inner side is A working space for inserting the bolt 12 must be secured. Therefore, when a vehicle body accessory is installed in the adjacent space (the fuel tank 16 or the like may be installed in the adjacent space), the capacity of the vehicle body accessory is reduced to secure the working space. May be limited.

Further, in the work of mounting the one end 8a of the trailing link 8 according to the above-described procedure, the position of the shaft hole 14 of the one end 8a and the work of inserting the bolt 12 from the lateral direction are performed by a machine. However, it is a factor that hinders automation of the mounting work.

In addition to the above problems, various loads are input from the wheel side to the mounting portion of the trailing link on the vehicle body side, so that it is desired to further improve the rigidity and strength of the mounting portion. There is also.

The problem to be solved by the present invention is to improve the rigidity of the vehicle body side mounting portion of the trailing link so that the space adjacent to the inner side of the mounting portion in the vehicle width direction can be effectively used, and the trailing link can be effectively used. It is an object of the present invention to provide a lower body structure of an automobile which can cope with automation of mounting work of the vehicle on the vehicle body side.

[0009]

As means for solving the above-mentioned problems, in the lower body structure for an automobile according to claim 1 of the present invention, the structure is joined to the vehicle width direction end portion of the floor panel and extends in the vehicle longitudinal direction. A side sill, a side frame that extends in the vehicle front-rear direction substantially in parallel with the side sill on the vehicle width direction inner side of the side sill and below the floor panel, and one end portion that extends in the vehicle body front-rear direction and is supported on the wheel side by the other end portion. In a lower vehicle body structure of an automobile including a trailing link supported on the vehicle body side, one end portion is joined to the side sill, the other end portion is joined to the side frame, respectively, and a connecting plate that connects the two is provided,
The other end of the trailing link is attached to the lower surface of the connecting plate from the lower side via a support member that rotatably supports the other end.

According to a second aspect of the present invention, there is provided an underbody structure for an automobile according to the present invention. A first closed cross section is formed between the side frame and the side sill by joining the lower surface of the floor panel to the vehicle width direction intermediate portion of the connection plate. The structure was joined to the side frame so that the second closed cross section was formed.

[0011]

In the vehicle body structure for a lower vehicle according to claim 1 of the present invention, the connecting plate for connecting the side sill and the side frame is joined to both of them, and the other end of the trailing link is It is attached to the lower surface of the connecting plate from below through a supporting member that rotatably supports the other end.

Since both the side sill and the side frame are members that form the skeleton of the vehicle body, they are connected by a connecting plate, and the other end of the trailing link is attached to this connecting plate. It is possible to improve the rigidity of the mounting portion of the vehicle body side.

Further, the other end of the trailing link is attached to the lower surface of the connecting plate from the lower side through a supporting member that rotatably supports the other end. When installing the ring link on the vehicle body side, the work space that was necessary is no longer required,
It is possible to effectively use the space adjacent to the vehicle-width side mounting position of the trailing link on the inner side in the vehicle width direction.

Further, since the trailing link can be mounted on the vehicle body side from the lower side, the positioning and the like can be facilitated, and the mounting work can be automated.

Further, in the lower body structure for an automobile according to claim 2 of the present invention, the side frame is such that an upper portion of the side frame is joined to a lower surface of the floor panel, and The intermediate portion is formed by the connecting plate and the side frame to form a first portion.
Of the trailing link, for example, since a closed cross section is formed and is joined to the side frame so that a second closed cross section is formed between the side frame and the side sill. It becomes possible to further improve the rigidity of the mounting portion of the trailing link on the vehicle body side, such that both ends of the trailing link can be attached to the first and second closed cross-section portions, respectively.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the lower body structure of an automobile according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view showing a lower body structure of an automobile according to an embodiment of the present invention, and FIG. 2 is a II in FIG.
-II is a sectional view taken along line II. In the figure, only the left side of the vehicle body is shown. As shown in the drawings, the lower body structure of an automobile according to the present embodiment includes a side sill 22 that extends in the vehicle front-rear direction at the vehicle width direction (left-right direction in the drawing) end of the vehicle body, and the side sill 22 inside the side sill 22 in the vehicle width direction. And a side frame 24 that extends in the front-rear direction of the vehicle body substantially in parallel therewith. The side sill 22 includes an outer panel 22a and an inner panel.
22b, and both panels 22a and 22b form a closed cross section. The side frame 24 has a U-shaped cross section,
The rear floor panel 26 (not shown in FIG. 1) is joined to the lower surface of the rear floor panel 26 so as to form a closed cross section.

Next, the features of the present invention will be described.
FIG. 3 is a perspective view of a connecting plate used in the vehicle body structure shown in FIG. 1, and FIG. 4 is a diagram showing an example of a trailing link mounting method in the vehicle body structure shown in FIG.

A feature of the present invention is that in this embodiment, the connecting plate 26 formed by bending as shown in FIG.
One end 26a is joined to the inner plate 22b of the side sill 22, and the other end 26b is joined to the side wall surface of the side sill frame 24 on the inner side in the vehicle width direction.
A support member for connecting the other end 28a of the trailing link 28, which is connected to the connecting plate 26 with the connecting plate 26 and extends in the vehicle front-rear direction and whose one end is supported on the wheel side, so that the other end 28a is rotatable. It is located at a point attached to the lower surface of the connecting plate 26 from below via 30. As shown in FIG. 4, bolt insertion holes 32 are formed at both ends of the support member 30, while bolt insertion holes are formed at predetermined positions on the lower surface of the connecting plate 26 as shown in FIG. A nut 34 is welded to the bolt insertion hole forming position. The other end 28a of the trailing link 28 has a support member 30 for rotatably supporting the other end 28a, a bolt 36 inserted through the bolt insertion hole 32, and a nut 34.
And are screwed together and connected to the lower surface of the connecting plate 26, so that they are supported on the vehicle body side.

Here, the other end 28 of the trailing link 28
A method of automatically mounting a on the vehicle body side by a machine will be described. The mounting device 40 shown in FIG. 4 includes a mounting table 42 configured to be movable up and down, and a mounting table 42 mounted on the mounting table 42.
And individual bolt fasteners 44. First, the above installation table
A trailing link 28 having a support member 30 having bolts 32 set thereon is mounted on the bolts 42, and the bolts 32 are mounted on the bolts 44.
It is installed in the predetermined position shown in the figure. After the trailing link 28 is installed, the installation table 42 is lifted up to a predetermined position by a driving means (not shown) (at this time, the positioning is also performed, but this positioning is performed on the bolt 36 and the connecting plate 26). This can be easily done because it is only necessary to align the position with the bolt insertion hole.) By driving the bolt tightening tool 44 to tighten the bolt 36, the mounting is completed.

As described above, according to the lower body structure of the automobile of this embodiment, the side sill is formed by the connecting plate 26.
22 and the side frame 24 are connected to each other, and the connection plate 26
Since the other end portion 28a of the trailing link 28 is attached to the trailing link 28, the rigidity of the attachment portion of the trailing link 28 to the vehicle body side can be improved. In this embodiment, as shown in FIG.
Connect the connecting plate 26 to the middle part 26c in the width direction of the vehicle.
26 and the side frame 24 form a first closed cross section A, and are joined to the lower surface of the side frame 26 so that a second closed cross section B is formed between the side frame 24 and the side sill 22. . The one end of the support member 30 has the first
And the other end is attached to the second closed section B portion. By forming the closed cross sections A and B in this manner, the rigidity of the mounting portion of the trailing link 28 on the vehicle body side can be further improved.

The other end 28a of the trailing link 28 is also used.
Is attached to the lower surface of the connecting plate 26 from below,
It is not necessary to provide a working space for mounting in the space inside the vehicle-side mounting portion of the trailing link 28 in the vehicle width direction. Therefore, as shown in FIGS. Can be effectively used as.

Further, according to the lower body structure of the vehicle according to the present embodiment, as shown in FIG.
It is possible to correspond to the automation of the attachment of the other end portion 28a to the vehicle body side.

Next, another embodiment of the lower body structure of an automobile according to the present invention will be described. FIG. 5 is a cross-sectional view showing a lower vehicle body structure of an automobile according to another embodiment of the present invention, and FIG. 6 is a perspective view of a connecting plate used in the vehicle body structure shown in FIG. In this embodiment, the same elements as those in the above embodiment are designated by the same reference numerals as those used in the drawings showing the embodiment, and detailed description thereof will be omitted.

The difference of this embodiment from the previous embodiment is the structure of the connecting plate 26. That is, in the above embodiment, the connecting plate 26 is formed by bending one member, but in this embodiment, as shown in FIGS. 5 and 6, the connecting plate 26 is formed in a U-shaped cross section. First member 27a and second member 27 having a stepwise cross section
b and b are joined together as shown in the figure. Further, one end 26a of the connecting plate 26 is attached to the side sill 22.
The other end 26b is joined to the side wall surface of the side frame 24 on the inner side in the vehicle width direction, and the connecting plate 26 is joined to the side sill.
22 is connected to the side frame 24 in the same manner as in the above-mentioned embodiment, but in the above-mentioned embodiment, the intermediate portion 26c of the connection plate 26 is joined to the lower surface of the side frame 24, but in the present embodiment, In the example, the intermediate portion of the connecting plate 26 (first member
27a and the second member 27b) 26c is a side frame
It is also different in that it is joined to the side wall surface of the vehicle width direction outer side of 24.

Although the trailing link is not shown in FIG. 5, the trailing link can be attached in the same manner as in the above embodiment.

Although the embodiment of the lower body structure for an automobile according to the present invention has been described above, the lower body structure for an automobile according to the present invention is not limited to this mode and various modifications can be made. is there.

[Brief description of drawings]

FIG. 1 is a plan view showing a lower body structure of an automobile according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a perspective view of a connecting plate used in the vehicle body structure shown in FIG.

FIG. 4 is a diagram showing an example of a method for attaching a trailing link in the vehicle body structure shown in FIG.

5 is a cross-sectional view corresponding to FIG. 2, showing a lower body structure of an automobile according to another embodiment of the present invention.

6 is a perspective view of a connecting plate used in the vehicle body structure shown in FIG.

FIG. 7 is a view showing a structure for attaching a trailing link to a vehicle body side in a conventional vehicle lower body structure.

[Explanation of symbols]

 4,22 Side sill 6,24 Side frame 8,28 Trailing link 26 Connecting plate 30 Support member A First closed cross section B Second closed cross section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiichi Ichimura 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Motor Corporation

Claims (2)

[Claims] 1. A side sill joined to an end portion of a floor panel in the vehicle width direction and extending in the vehicle front-rear direction, and extending in the vehicle front-rear direction substantially in parallel with the side sill on the vehicle width direction inner side of the side sill and below the floor panel. In a lower vehicle body structure of a vehicle including a side frame and a trailing link extending in the vehicle front-rear direction, one end of which is supported on the wheel side and the other end of which is supported on the vehicle body side, one end of which is on the side sill and the other end of which is A connecting plate is provided, which is connected to the side frame to connect the side frames to each other, and the other end of the trailing link is connected via a support member that rotatably supports the other end. A lower body structure for an automobile, which is attached to the lower surface of the plate from below. 2. The side frame has an upper portion of the side frame joined to a lower surface of the floor panel, and an intermediate portion in the vehicle width direction of the connecting plate is formed by the connecting plate and the side frame. A closed cross section is formed, and a second cross section is formed between the side frame and the side sill.
2. The lower body structure for an automobile according to claim 1, wherein the lower frame structure is joined to the side frame so as to form a closed cross section.