JP3441576B2 - Car floor 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 floor structure constituted by welding and connecting hollow extruded materials extruded from a light metal material such as aluminum.

[0002]

2. Description of the Related Art Conventionally, in a vehicle body structure of an automobile, for example, in a monocoque body, a plurality of plate materials are press-molded and joined together to form a box structure to secure the rigidity of the floor portion of the vehicle body. On the other hand, demands for weight reduction of the vehicle body and reduction of manufacturing costs are increasing,
A long hollow material extruded from a light metal material such as aluminum with a constant cross-sectional shape allows the cross-sectional shape to be set relatively freely, and also allows the thickness in the horizontal and vertical directions to be different from each other. Since it can be molded, desired strength characteristics according to the site of use can be obtained with high efficiency, so that attention is recently being focused on its use as a frame constituent material for automobiles.

In such a light metal (aluminum) body, a plate material is pressed and a side sill made of an extruded material is joined to the plate material to secure the rigidity of the floor portion of the vehicle body.

[0004]

However, in the case of pressing a plate material, not only the processing and welding equipment for the press material becomes large as in the case of the monocoque body, but the light metal described above has a linear thermal expansion as compared with the steel material. Since the rate is high, heat distortion is likely to occur during welding, and it was difficult to ensure its accuracy.

Further, a plurality of hollow extruded materials extruded from a light metal material are extended in the front-rear direction of the vehicle body to
Welding may be connected to each other in the left-right direction, but in consideration of the arrangement of the equipment installed in the vehicle, each extruded material
Since the cross-sectional shapes have to be different from each other and many molds are required, the manufacturing cost increases at present.

The present invention has been devised in order to solve the problems imposed on the prior art as described above, and the purpose thereof is not to increase the size of molding and processing equipment.
Another object of the present invention is to provide an automobile floor structure that can be configured to be lightweight, lightweight, and inexpensive.

[0007]

In order to achieve such an object, in the present invention, a plurality of hollow extruded materials (2 to 6) extruded from a light metal material such as aluminum are formed in a vehicle body.
Left and right adjacent to each other and the front-back direction of the vehicle body
A floor structure of an automobile configured to extend to,
Same cross-section at symmetrical positions with respect to the longitudinal center axis of the vehicle body
Place the extruded materials in the front and back
Note: For multiple extruded materials,
The elastic engagement part (8) for temporarily fixing is formed to
Providing a vehicle floor structure, characterized in that the engagement portion formed by welding the elastic onset engagement portion is temporarily fixed state <br/>
did. As a result, the mold does not become large, and many molds
It is not necessary, and positioning during welding becomes easy,
Welding workability is improved. Especially accepts the head of the bolt (9)
The T slot (1c) of
Extend horizontally in the center of the slot and part of the floor
The existing part should be connected by a vertical rib (1d).
Result in complicated structure, increased weight, and decreased rigidity.
It is possible to form the attachment portion of the bolt without using the bolt .

[0008]

DETAILED DESCRIPTION OF THE INVENTION The structure of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a floor portion 1 of a vehicle body frame of an automobile to which the present invention is applied. This vehicle body frame is a space frame composed of a resin inner plate and a frame formed by welding together pipe-shaped hollow members extruded from a light metal material such as aluminum, and is used for rigidity, strength, and collision performance. It has a body structure that uses a highly efficient and straight frame.

FIG. 2 shows the floor part 1 of the frame according to the invention.
2 is a plan view showing the structure of FIG. 3, and FIG. 3 is a cross-sectional view taken along line III-III of FIG. In this floor portion 1, five hollow extruded materials 2 to 6 are arranged such that their longitudinal directions extend in the front-rear direction of the vehicle body (the left-right direction in FIG. 2), and they are mutually connected. It is formed by welding to. The side sills 2a and 6a are the extruded materials 2 and 6 located at the left and right side ends, respectively.
Are formed integrally with each other.

[0011] Here, the rightmost extruded material 2 and left extrusions 6, parallel
And the right intermediate extruded material 3 and the left intermediate extruded material 5 are in front of the vehicle body.
It has a cross-sectional shape that is symmetrical with respect to the rear central axis . In addition, the extruded material 4 in the center also faces the center axis of the vehicle body in the front-rear direction.
And has a symmetrical cross-sectional shape. Right extruded material 2
The left end extruded material 6 and the pair of the right intermediate extruded material 3 and the left intermediate extruded material 5 are molded from the same mold and have the same cross section.
And a shape, which is inverted before and after the central extruded material 4
Arranged symmetrically about the, to form a floor portion 1 by coupling each to each other. That is, this
These five extruded materials 2 to 6 can be molded with three types of molds.
You can do this. In addition, the right end extruded material 2 and the left
Inner side surface with end extruded material 6, right middle extruded material 3 and left middle
On both left and right side surfaces of the extruded material 5 and the central extruded material 4 , engaging parts 8 for integrally adhering the extruded materials adjacent to each other with high accuracy and for facilitating temporary holding and holding are integrally formed. Has been done. Of these, those located outside are shown in FIG.
As shown in (a), the elasticity of the material itself is used
Are engaged with each other. Also located inside
Engage with tapered surfaces as shown in FIG. 4 (b).
It is like this. Therefore, by temporarily stopping the respective extruded material 2-6 at the engaging portion 8 and the positioning of the front-soluble
It is possible to improve the position accuracy and workability at the time of contact.
It Incidentally, notch 1a to the floor portion 1 for receiving a wheel house (left and right rear wheels) to the rear left and right, but 1b are provided, in fact, far right extruded material 2 and left extrusions 6
When cutting out and, just make it shorter than other extruded materials 3-5
Since it does not require a separate secondary processing in, and efficient use of the work efficiency and material.

As shown in FIG. 2, in the hollow section of the extruded material 5 , a curtain rail- shaped T- slot for receiving the head of the bolt 9 is formed.
Lot 1c is formed. With this structure, bolts , which have been one of the most troublesome operations in extruded materials
The formation of the receiving portion can be performed collectively by extrusion molding. In addition, the central portion of the T slot 1c and one of the floor portion 1
A vertical rib 1d is provided between the part and the part extending in the horizontal direction.
Is provided. As a result , the structure is simple, and there is no fear that the structure will be lightweight and the rigidity will not deteriorate.

The fuel tank 10 and the seat rail 1 are formed by forming appropriate recesses in the extruded materials 2 to 6.
1, subframe mounting boss 12, wire harness 13
Space can be arranged efficiently (Fig. 2).

[0014]

As described above, according to the present invention, a plurality of hollow extruded materials extruded from a lightweight light metal material are arranged so as to extend in the front-rear direction of the vehicle body, and have a structure in which they are connected by welding. By arranging and welding the extruded materials having the same shape symmetrically with respect to the center of the vehicle body, the types of the extruded materials can be reduced, the molding and processing equipment can be downsized, and the cost can be reduced. Further, by providing elastic engagement pieces on the side surfaces of the extruded materials for the purpose of temporarily temporarily adjoining the extruded materials, the positional accuracy and the welding workability at the time of welding are improved.
Push the T-slot, which receives the head of the bolt, into the hollow section.
It is molded, and the central part of the T-slot and a part of the floor part are removed.
And a part that extends in the horizontal direction is connected by a vertical rib.
This will complicate the structure, increase the weight, and reduce the rigidity.
The mounting portion of the bolt can be formed without inviting .

[Brief description of drawings]

FIG. 1 is an overall perspective view of a floor portion of a vehicle body frame to which the present invention has been applied.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG.

4A and 4B are enlarged views of a main part of FIG.

[Explanation of symbols]

1 Floor 1a, 1b Cutout 1c T slot 1d Vertical ribs 2-6 Extruded materials 2a, 6a Side sill 8 Engagement 9 Bolt 10 Fuel tank 11 Seat rail 12 Subframe mounting boss 13 Wire harness

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Laid-Open No. 7-144661 (JP, A) Actual exploitation Sho 57-158592 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B62D 25/20

Claims (2)

(57) [Claims] 1. A plurality of hollow extruded materials extruded from a light metal material such as aluminum are joined together in the left-right direction of the vehicle body.
A floor structure of an automobile configured to be adjacent to each other and extend in the front-rear direction of the vehicle body, and having the same cross section at symmetrical positions with respect to the longitudinal center axis of the vehicle body.
Shaped extruded materials are arranged in mutually opposite directions, and the plurality of extruded materials are adjacent to each other.
An elastic engagement part for temporarily fixing and holding is formed on the elastic engagement part, and the elastic engagement part is welded with the elastic engagement part temporarily fixed.
Vehicle floor structure characterized by comprising in. 2. A hollow T-slot for receiving a bolt head.
Extruded in the cross section, the center and floor of the T slot
The vertical ribs connect to the horizontally extending part that forms part of the
Vehicle floor structure according to claim 1, characterized in that.