JP3227902B2 - Automotive suspension mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile suspension mounting structure.

[0002]

2. Description of the Related Art FIG. 7 shows an example of a suspension mounting structure for a vehicle. In the figure, a cross member 1 is formed into a hat-shaped cross-sectional shape by press molding, and an insertion hole 3 for a suspension bolt 2 is formed in a bottom wall 1a. A lower reinforcement 4 having a U-shaped cross section along the inner wall of the cross member 1 is joined to the inside of the cross member 1, and a head of the suspension bolt 2 is attached to an upper portion of the lower reinforcement 4. An upper reinforce 5 that is supported and fixed to an upper portion of the inner wall of the lower reinforce 4 is attached. Then, the lower end of the suspension bolt 2 fixed so as to pass through the upper reinforcement 5 and the lower reinforcement 4 is inserted into the insertion hole 3 of the bottom wall 1 a of the cross member 1.
And the suspension is supported here (this structure is disclosed in JP-A-3-28009).

[0003]

In the above-mentioned conventional suspension mounting structure, the load applied to the suspension bolt 2 can be effectively transmitted to the cross member 1 by the upper reinforcement 5 and the lower reinforcement 4. Although it is possible, since the upper and lower reinforcements 5 and 4 are inserted and attached inside the cross member 1, for example, when the cross member 1 is made of an extruded material having a closed cross section, such a structure is used. Can not adopt a simple structure. For example, when a lightweight and highly rigid vehicle body is required to support the weight of a battery as in an electric vehicle, the use of a cross member 1 made of extruded aluminum is considered. In the cross member 1 described above, the upper reinforcement 5 and the lower reinforcement 4 cannot be inserted as they are, so that a structure in which the suspension bolt 2 is dropped into the cross member 1 cannot be adopted.

SUMMARY OF THE INVENTION Accordingly, the present invention provides a structure for mounting a suspension of an automobile, which can adopt a structure for dropping and mounting a suspension bolt even for a vehicle body member made of extruded material.

[0005]

Opening is provided on the end or side of the vehicle body members made of extruded material closed cross SUMMARY OF THE INVENTION While the notch communicating with the opening in the bottom wall of the body member is provided, closed the upper wall of the blocks formed in the sectional structure, the suspension bolts passing through the upper and lower walls of the block is fixed, the blanking of the suspension bolt
The portion projecting locking the lower One is received in the notch
First, the block is closed so as to close the opening.
Inserted into the closed section of the vehicle body member through the opening
In, the block is fixed to the vehicle body member.

[0006]

The function of a body member having a closed cross-section structure made of extruded material
The block is inserted into the inside of the closed cross section of the vehicle body member so as to close the opening provided at the end or the side . Suspension bolts are provided on the block in advance so as to penetrate vertically, and the portions of the suspension bolts projecting below the block
The block is fixed to the vehicle body member by receiving the portion in the notch portion connected to the opening.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows a rear floor 6 of an electric vehicle, in which a cross member 8 as a vehicle body member is attached across right and left rear side members 7. In addition, 9
Indicates a spare tire pan. The cross member 8 is formed of an extruded aluminum material. As shown in FIG. 5, the cross member 8 is partitioned by an upper wall 8a and a lower wall 8b with a partition wall 8c to form an upper chamber 8A and a lower chamber 8B. It has a cross section of the shape of the sun.

As shown in FIG. 4, both ends of the cross member 8 are cut off on the lower chamber 8B side, and the upper chamber 8A side is attached to the rear side member 7. The end on the lower chamber 8B side is formed as an opening 10. Have been. The lower wall 8b is formed with a notch 12 which is continuous with the opening 10 and receives a suspension bolt 11 described later.

On the other hand, FIG. 1 and FIG. 3 show a block 13 which is inserted into the opening 10 of the lower chamber 8B of the cross member 8 and closes it. The block 13 is formed of an extruded aluminum material similarly to the cross member 8, and includes a block portion 14 having a square cross section and a plate portion 15.

As shown in FIG. 3, an aluminum collar 17 having a flange 16 at the top is provided through the upper wall 14a and the lower wall 14b of the block portion 14 (block 13). The flange 16 of the collar 17 is fixed to the lower wall 14b by welding, respectively. An iron suspension bolt 11 is inserted into the collar 17. The suspension bolt 11 has a flange 11B on a four-shaped head 11A, and the flange 11B is overlapped with the flange 16 on the collar 17 above.

A detent member 19 having a square hole 18 aligned with the head 11A of the suspension bolt 11 is mounted on the upper wall 14a of the block part 14.
9 is welded and fixed to the block portion 14 and the plate portion 15. As a result, the rotation of the suspension bolt 11 is completely stopped.

The plate portion 15 is formed integrally with the side wall of the block portion 14, and closes the opening 10 of the lower chamber 8B of the cross member 8.

The block 1 thus formed is
3 into the opening 10 of the cross member 8, and
The block 13 is fixed to the cross member 8 by welding or the like with the suspension bolt 11 protruding downward from the notch 3 being received in the notch 12 of the lower wall 14b of the block 13 as shown in FIG. The suspension bolts 11 can be dropped and protruded from the lower ends of both ends of the vehicle.

According to the structure of the above-described embodiment, a drop-in type suspension bolt 11, which is a cross member 8 having a closed sectional structure, can be attached.

Therefore, the load acting on the suspension bolt 11 supported on the upper wall 14a and the lower wall 14b of the block 13 acts on the entire block 13 by the upper wall 14a and the lower wall 14b of the block 13 via the collar 17. Therefore, the load can be efficiently transmitted from the block 13 to the cross member 8.

That is, the block 1 having the closed cross-sectional structure without the joint is provided inside the cross member 8 having the closed cross-sectional structure without the joint.
By attaching 3, the suspension bolt 11 can be fixed to the cross member 8, so that the support rigidity of the suspension bolt 11 can be increased.

Further, since the block 13 has the plate portion 15, it also has a function as a lid for closing the opening 10 of the cross member 8, so that the number of parts is smaller than when a separate lid is provided. It is possible to reduce the cost and reduce the cost.

When the block 13 is fixed to the cross member 8, the opening of the block 13 is closed by the side wall of the cross member 8. A portion advantageous in strength and rigidity is formed, so that it can withstand a large input load.

Next, a second embodiment of the present invention will be described with reference to FIG.

In this embodiment, a suspension bolt 11 is attached to a rear side member 7 formed of an extruded material. Specifically, an opening 10 is formed near the lower wall 7b of the inner side wall 7a of the rear side member 7, and is connected to the opening 10 to form the lower wall 7b of the rear side member 7.
A notch 12 for receiving the suspension bolt 11 is formed in the vehicle. As in the first embodiment, a block 13 including a block portion 14 and a plate portion 15 inserted into the opening 10 is provided, and the block portion 14 is inserted into the opening 10, and the suspension bolt 11 is cut out. 1
The block 13 is attached to the rear side member 7 while the opening 10 is closed by the plate portion 15 in a state where the block 13 is received by the plate 2. Incidentally, reference numeral 17 denotes a collar, and 19 denotes a detent member.

Therefore, also in this embodiment, the block 13 having the closed section structure is fixed to the rear side member 7 having the closed section structure, and the suspension bolt 11 is supported by the upper wall 14a and the lower wall 14b of the block 13. As a result, it is possible to obtain a high support rigidity capable of withstanding an input load from the suspension.

[0022]

As described above, according to the present invention, the upper wall and the lower wall of the block are attached to the opening of the vehicle body member having the closed section formed by the extruded material. A so-called drop-in structure in which the suspension bolt penetrated through the vehicle body projects below the vehicle body member can be adopted, and the support rigidity of the suspension bolt can be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a perspective view of the rear floor.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is an exploded perspective view of a main part of FIG. 2;

FIG. 5 is a sectional view taken along the line BB in FIG. 2;

FIG. 6 is an exploded perspective view of the second embodiment.

FIG. 7 is a sectional view of a conventional technique.

[Explanation of symbols]

 8 Cross member (body member) 8b Lower wall 10 Opening 11 Suspension bolt 12 Notch 13 Block 14a Upper wall 14b Lower wall

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-28009 (JP, A) JP-A-4-55172 (JP, A) JP-A-4-81372 (JP, A) JP-A-4-81 90976 (JP, A) Japanese Utility Model Hei 2-45879 (JP, U) Japanese Utility Model Sho 63-93277 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 21/00 B62D 21 / 11 B62D 25/20

Claims (1)

(57) [Claims] 1. A opening in the end or side of the vehicle body member of closed cross section made of extruded material is provided, while the cut-out portion continuous to the opening in the bottom wall of the body member is provided, formed in a closed sectional structure the upper wall of the block, the suspension bolts passing through the upper and lower walls of the block is fixed, projecting downwardly of the block of the suspension bolt
That while the portion is received in the notch, the block, so as to close the opening, the opening
In a state where the mouth portion is inserted inside closed cross section of the body member, the suspension mounting portion structure of an automobile, characterized in that said block is fixed to the vehicle body member.