JPH067024Y2 - Joining structure of automobile wheel arch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a joint structure of a wheel arch portion of an automobile.

(Prior Art) The joint structure between the outer panel of the wheel arch portion of the automobile, particularly the rear wheel arch portion and the upper arch panel of the wheel house formed in the wheel arch portion is as shown in FIG. The vicinity of the lower end of the wheel arch portion of the plate (100) is formed as a bulged portion (100a) that is once bulged outward, and then bent inward, and the end of the bent portion (100b) and the arch panel ( The flange portion (101a) of 101) is overlapped and joined by spot welding.

However, from the viewpoint of improving the appearance of the automobile and aerodynamics, as shown in Fig. 4, the outer plate (2
The so-called blister type is often used for 00), which bulges outward slightly at the upper part of the wheel arch and keeps the bulge on the surface downward. In this case this skin
The joint between the (200) and the arch panel (201) is similar to that shown in FIG. 6, and the inward bent portion (200a) of the outer panel (200) and the flange portion (201a) of the arch panel (201). ) Are overlapped and spot welding is performed.

(Problems to be solved by the invention) When spot bending is performed by overlapping the bent portion (200a) of the outer plate (200) and the flange portion (201a) of the arch panel (201) shown in FIG. 4, Since the welded part contracts, the outer plate (20
0) and the vicinity of the welded part of the arch panel (201) will be pulled toward the welded part. Here, as shown in FIG.
(100) With a bulge (100a) at the bottom, problems are less likely to occur because the outer plate (100) around the weld has a high rigidity, but a blister-shaped outer plate (200) as shown in FIG. Since the lower part is flat and the rigidity is relatively small, as shown in Fig. 5, the outer plate (2
The concave portion (200a) of 00) and the concave deformation (202) around the bent portion (200a) due to spot welding are apt to occur, which may impair the appearance of the vehicle body.

Therefore, there is also a means to increase the rigidity by using a thick plate for the outer plate or to hide the deformed part of the outer plate by molding, but the former causes an increase in weight and cost of the vehicle body, and the latter causes deformation of this outer plate. In contrast, it does not take any fundamental measures.

The present invention has been made to solve the above problems, and its purpose is to weld the outer plate observed from the outside only by slightly changing the structure of the joint between the outer plate and the arch panel. It is an object of the present invention to provide a vehicle body joint structure for a wheel arch portion of an automobile that does not cause deformation.

(Means for Solving Problems) A means for solving the above problems is a vehicle body in which an outer plate of a wheel arch portion of a vehicle body and an arch panel above a wheel house formed in the wheel arch portion are welded and joined. In the above structure, the outer plate is formed with a bent portion that is bent in a substantially U-shape inwardly and upwardly of the wheel house, and the tip end of the bent portion is further bent toward the inside of the wheel house to form a flange portion. And a flange portion formed by bending the flange portion and the tip portion of the arch panel inward of the wheel house,
That is, they were welded.

(Function) The outer plate of the wheel arch part is bent upward inward of the wheel house to form a bent part in a substantially U shape, and the tip part of this bent part is bent to the inside of the wheel house to form a flange. The flange part is formed by bending the tip part of the arch panel inward of the wheel house and welding each flange part together, the rigidity around the flange part in the outer plate is improved, and each flange part is formed. Even if they are joined together by welding, heat shrinkage deformation due to welding does not easily occur, and even if heat shrinkage deformation occurs, the outer plate is bent inward in the wheel house, so the wheel house Only the inner skin is deformed, and the appearance of the vehicle body is not impaired.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying FIGS.

FIG. 1 is a perspective view mainly showing a rear part of a two-door type automobile, and a wheel arch part (2) having a substantially arcuate lower end is formed on a rear wheel (1).

In FIG. 2, an outer plate (10) on the vehicle body side extending from above the vehicle body to the lower wheel arch portion (2) has a cross section protruding outward at the upper portion of the wheel arch portion (2) ( 10a), and the outer plate (10) below the protrusion (10a) forms a flat plate portion (10b) whose cross section extends downward linearly to the lower end of the wheel arch portion (2). It has a shape.

Here, the side outer plate (10) of the vehicle body is a substantially horizontally bent inner extending part (10c) from the flat plate part (10b) into the wheel house (3) in which the rear wheel (1) is arranged. And a rising portion (10d) bent upward from the inner extending portion (10c), that is,
A bent portion is formed by bending it into a substantially "U" shape, and the end portion thereof is again a flange portion (10e) protruding slightly downward into the wheel house (3).

On the other hand, the structure of the wheel arch portion (2) in the wheel house (3) will be described. Above the rear wheel (1), there are inner and outer arch panels (11), (12) having an arc-shaped cross section. The inner arch panel (11) and the outer arch panel (12) have flange portions (11a) and (12a) whose upper ends bend upward. , The inner arch panel (11) and the outer arch panel (12) are the flange portions (11a), (12a)
Are sandwiched and fixed to each other by sandwiching the inner plate (13) of the vehicle body. The inner arch panel (11) also extends to the side of the rear wheel (1).

Wheel house at the lower end of the outer arch panel (12)
(3) The flange portion (12b) is bent inward and overlaps with the flange portion (10e) of the outer plate (10). And the outer plate (1
0) and outer arch panel (12)
e) and (12b) are joined by spot welding.

Here, in the vicinity of the flange portion (10e) of the outer plate (10), the flat plate portion (10b),
Since the internal extending part (10c) and the rising part (10d) are formed in a U-shaped cross section, the local rigidity can be remarkably increased around the flange part (10e) of the outer plate (10). The heat shrinkage deformation of the outer plate (10) due to the welding of the portion (10e) is hard to occur, and even if it occurs, it is only the rising part (10d) and the inner extending part (10c) of the outer plate (10). There is no problem with the appearance of.

It should be noted that the shapes of the inner extending portion (10c) and the rising portion (10d) of the outer plate (10) may be replaced by the bulging portion (10f) bulging inward in an arcuate cross section as shown in FIG. The same effect as described above can be obtained.

(Effect of the device) The lower end of the outer plate of the wheel arch is bent upward inward of the wheel house to form a bent part, and the tip of this bent part is bent inside the wheel house. By bending to form the flange part, the tip of the arch panel is bent inward of the wheel house to form the flange part, and each flange part is welded and joined, so the rigidity around the flange part of the outer plate is improved. , Even if the flange parts are joined together by welding, heat shrinkage deformation due to welding is unlikely to occur, and even if heat shrinkage deformation occurs, the outer plate is bent inward in a U-shape in the wheel house. Therefore, only the outer plate in the wheel house is deformed, and the appearance of the vehicle body is not deteriorated.

[Brief description of drawings]

FIG. 1 is a perspective view mainly showing the rear part of a two-door type automobile, FIG. 2 is a cross sectional view taken along the line AA of FIG. 1 showing a cross section of a wheel arch portion, and FIG. 3 is a wheel. FIG. 4 is a view showing another embodiment of the bent portion of the outer plate of the arch portion, FIG. 4 is a view of a prior art showing attachment of a blister-shaped outer plate of a wheel arch portion, and FIG. Figure showing,
FIG. 6 is a prior art view showing the attachment of the outer plate of the wheel arch portion. In the drawings, (2) is a wheel arch portion, (3) is a wheel house, (10) is an outer plate, (10c) is an internally extending portion, (10d) is a rising portion, (10e) is a flange portion, (10f) is a bulge, and (12) is an outer arch panel.

Claims (1)

[Scope of utility model registration request] 1. A structure of a vehicle body in which an outer plate of a wheel arch portion of a vehicle body and an arch panel at an upper portion of a wheel house formed in the wheel arch portion are welded and joined to each other. Forming a bent portion bent into a letter shape, further bending the tip end portion of the bent portion inward of the wheel house to form a flange portion, and forming the flange portion and the tip end portion of the arch panel A joint structure for a wheel arch portion of an automobile, characterized in that a flange portion formed by bending inward of a house is welded and joined.