JP3212710B2 - Lower body structure of car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art FIGS. 7 (a) and 7 (b) are views showing a mounting structure of a trailing link on a vehicle body side in a conventional lower body structure of an automobile, wherein FIG. 7 (a) is a perspective view and FIG. . FIG.
As shown in (b), 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 paper surface) is provided at the end of the rear floor panel 2 in the vehicle width direction. A side frame 6 that is joined and forms a closed cross section together with the rear floor panel 2 and the side sill 4 extends substantially parallel to the side sill 4 in the vehicle width direction inside.

Conventionally, as shown in FIG. 7, one end 8a of a trailing link 8 is formed in a space of a mounting bracket 10 having a U-shaped cross section joined to the side frame 6 at one end 8a.
After being inserted into the inside 10a, the bolt 12 penetrates the side walls 10b, 10c of the bracket member 10 and the shaft hole 14 formed at one end 8a of the trailing link 8 from the inside in the vehicle width direction, and
It was general that it was attached to the body side by screwing with 16.

[0004] In Fig. 7, the side frame 6 is joined to the side sill 4, but a structure in which the side sill and the side frame are arranged at a predetermined distance from each other is also common.

[0005]

The above-mentioned conventional trailing link mounting structure in the lower body structure of an automobile has the following problems. First, since the bolt 12 that supports the one end 8a of the trailing link 8 is inserted from the inside in the vehicle width direction, the space adjacent to the inside of the vehicle width direction at the mounting position of the trailing link 8 on the vehicle body side includes: A work space for inserting the bolt 12 must be secured. For this reason, when the vehicle body accessories are arranged in the adjacent space (the fuel tank 16 and the like may be arranged in the adjacent space), the capacity of the vehicle body accessories is reduced to secure the work space. May be restricted.

In the operation of attaching the one end 8a of the trailing link 8 according to the procedure described above, the positioning of the shaft hole 14 of the one end 8a and the insertion of the bolt 12 from the lateral direction are performed by a machine. Is extremely difficult, which has been a factor hindering the automation of the mounting operation.

In addition to the above problems, since various loads are input to the mounting portion of the trailing link to the vehicle body from the wheel side, there is a demand for further improving the rigidity and strength of the mounting portion. There is also.

[0008] An object of the present invention is to improve the rigidity of the mounting portion of the trailing link on the vehicle body side, to enable effective use of the space adjacent to the inside of the mounting portion in the vehicle width direction. It is an object of the present invention to provide a lower body structure of an automobile capable of responding to an automation of a mounting work on a vehicle body side.

[0009]

According to a first aspect of the present invention, there is provided a lower body structure of an automobile according to the present invention, which is joined to an end of a floor panel in a vehicle width direction and extends in a longitudinal direction of the vehicle. side sill and the junction of the lower surface of the upper in the vehicle width direction inner side of the side sill is the floor panel
And a trailing link extending in the vehicle longitudinal direction substantially parallel to the side sill, and a trailing link extending in the vehicle longitudinal direction and having one end supported on the wheel side and the other end supported on the vehicle body side. In the vehicle body structure, a connection plate connecting one end to the side sill and the other end to the side frame, the connection plate connecting the two, and the toe.
Supporting part that rotatably supports the other end of the railing link
And the middle of the connecting plate in the vehicle width direction.
Part is formed by the connecting plate and the side frame.
1 is formed, the side frame and the side
The side so that a second closed section is formed between the side and the sill.
The support member is joined to one end of the support member in the vehicle width direction.
And the other end of the first and second connection plates, respectively.
And attached to the lower surface of the second closed section from below .

[0010]

In the lower vehicle body structure according to the first aspect of the present invention, a connecting plate connecting the side sill and the side frame is joined to both, and the other end of the trailing link is connected to the connecting plate. It is attached to the lower surface of the connection plate from below through a support member that rotatably supports the other end.

Since both the side sill and the side frame are members forming the framework of the vehicle body, the two are connected by a connecting plate, and the other end of the trailing link is attached to the connecting plate. The rigidity of the mounting portion on the vehicle body side can be improved.

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

Further, since the trailing link can be attached to the vehicle body from the lower side, positioning and the like can be easily performed, and therefore, the attaching operation can be automated.

Further , the side frame has an upper portion joined to a lower surface of the floor panel, and an intermediate portion of the connecting plate is first closed by the connecting plate and the side frame. cross section is formed, the second closed section is joined to the side frame so as to be formed between the side sill and the side frame, both end portions of the support member for supporting the other end portion of the trailing link said Since the trailing link is attached to the first and second closed cross-section portions, the rigidity of the attachment portion of the trailing link to the vehicle body can be further improved.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a lower vehicle body structure of an automobile according to the present invention;

FIG. 1 is a plan view showing a lower body structure of an automobile according to an embodiment of the present invention, and FIG.
FIG. 2 is a sectional view taken along line II. The figure shows only the left side of the vehicle body. As shown in the drawing, the lower body structure of the vehicle according to the present embodiment includes a side sill 22 extending in the vehicle front-rear direction at an end of the lower part of the vehicle body in the vehicle width direction (lateral direction in the drawing), and And a side frame 24 extending in the vehicle front-rear direction substantially in parallel. The side sill 22 includes the outer panel 22a and the inner panel 2
2b, and a closed section is formed by both panels 22a and 22b. The side frame 24 has a U-shaped cross section and is joined to the lower surface of the rear floor panel 26 so as to form a closed cross section together with the rear floor panel 26 (omitted in FIG. 1).

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 method of attaching a trailing link in the vehicle body structure shown in FIG.

A feature of the present invention is that, in the present 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 inner side wall surface of the side sill frame 24 in the vehicle width direction.
A supporting member 30 that connects the other end 28a of the trailing link 28 extending in the vehicle longitudinal direction and having one end supported on the wheel side, and rotatably supporting the other end 28a. Through the lower surface of the connection plate 26 from below. As best shown in FIG.
At both ends of the support member 30, bolt insertion holes 32 are formed. On the other hand, as shown in FIG. 2, bolt insertion holes are also formed at predetermined positions on the lower surface of the connection plate 26, and the bolt insertion holes 32 are formed. A nut 34 is welded to the forming position.
The other end portion 28a of the trailing link 28 is connected to the support member 30, which rotatably supports the other end portion 28a, by screwing a bolt 36 inserted into the bolt insertion hole 32 and the nut 34. Then, by being coupled to the lower surface of the connection plate 26, it is supported on the vehicle body side.

Here, the other end 28 of the trailing link 28
A method of automatically attaching a to the vehicle body by a machine will be described. The mounting device 40 shown in FIG. 4 includes a mounting table 42 configured to be able to move up and down, and a mounting table 42 mounted on the mounting table 42.
And a plurality of bolt fasteners 44. First, the installation table
On the trailing link 28 having a support member 30 on which a bolt 32 is set, the bolt 32 is
Is set at a predetermined position shown in FIG. After the trailing link 28 is installed, the mounting table 42 is raised 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 performed because it is only necessary to perform the alignment with the bolt insertion hole.) By driving the bolt fastener 44 and tightening the bolt 36, the mounting is completed.

As described above, according to the lower body structure of the automobile according to the present embodiment, the side plate is connected by the connecting plate 26.
22 and the side frame 24, and the connecting plate 26
Since the other end 28a of the trailing link 28 is attached to the vehicle, the rigidity of the attachment portion of the trailing link 28 to the vehicle body can be improved. In this embodiment, as shown in FIG.
Connect the middle part 26c of the connecting plate 26 in the vehicle width direction to the connecting plate 2
6 and the side frame 24 are joined to the lower surface of the side frame 26 so that a first closed section A is formed and a second closed section B is formed between the side frame 24 and the side sill 22. . One end of the support member 30 is connected to the first
And the other end is attached to the second closed section B. By forming the closed 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 attached to the lower surface of the connection plate 26 from below.
There is no need to provide a work space for mounting in the space inside the vehicle width direction of the trailing link 28 at the vehicle body side mounting portion, and therefore, as shown in FIGS. Can be used effectively.

Further, according to the lower body structure of the automobile according to the present embodiment, as shown in FIG.
It is also possible to cope with automation of the mounting of the other end 28a on the vehicle body side.

Next, another embodiment of the vehicle body lower body structure according to the present invention will be described. FIG. 5 is a sectional view corresponding to FIG. 2 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 the present embodiment, the same elements as those in the above-described embodiment are denoted by the same reference numerals as those in the drawings illustrating the above-described embodiment, and detailed description thereof will be omitted.

The present embodiment is different from the above-described embodiment in 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 27b formed in a stepped cross section
Are joined to each other as shown in the figure. Also, one end 26a of the connection plate 26 is
The other end 26b is joined to the side wall surface on the inner side in the vehicle width direction of the side frame 24, and the connecting plate 26 is
The connection between the side frame 24 and the side frame 24 is the same as in the previous embodiment, but in the above embodiment, the intermediate portion 26c of the connection plate 26 is joined to the lower surface of the side frame 24. In the example, the intermediate portion of the connecting plate 26 (the first member
The joint between the second member 27a and the second member 27b) 26c is the side frame 24
Is joined to the side wall surface on the outside in the vehicle width direction.

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

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

[Brief description of the 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 the line II-II in FIG.

FIG. 3 is a perspective view of a connecting plate used in the vehicle body structure shown in FIG. 1;

FIG. 4 is a diagram showing an example of a method of attaching a trailing link in the vehicle body structure shown in FIG. 1;

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

FIG. 6 is a perspective view of a connecting plate used in the vehicle body structure shown in FIG. 5;

FIG. 7 is a diagram showing a mounting structure of a trailing link on a vehicle body side in a conventional lower body structure of an automobile.

[Explanation of symbols]

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

Continued on the front page (72) Inventor Seiichi Ichimura 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Inside Mazda Co., Ltd. (56) References JP-A 4-26884 (JP, U) JP-A 63-16982 (JP, U) Japanese Utility Model Showa 30-30586 (JP, U) Japanese Utility Model Showa 55-31791 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 25/20

Claims (1)

(57) [Claims] 1. A side sill extending in the longitudinal direction of the vehicle body is joined in the vehicle width direction end portion of the floor panel, the side sill Te <br/> top in the vehicle width direction inner side of the side sill is joined to the lower surface of the floor panel And a trailing link extending in the vehicle longitudinal direction substantially parallel to the vehicle body and having a trailing link extending in the vehicle longitudinal direction and having one end supported on the wheel side and the other end supported on the vehicle body side. A connection plate connecting one end to the side sill and the other end to the side frame, respectively
And rotatably support the other end of the trailing link.
A support member is provided , and a middle portion of the connection plate in the vehicle width direction is connected to the connection plate.
And the side frame form a first closed cross section.
Between the side frame and the side sill.
Joined to the side frame so that a closed section is formed
Is, one end and the other end in the vehicle width direction of the support member, it
A lower vehicle body structure for an automobile, wherein the lower plate is attached to lower surfaces of first and second closed cross-section portions of the connection plate from below.