JPS6236691Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the body structure of an automobile.

Generally, in a unitary structure in which a rear panel functioning as a vehicle body outer panel is provided at the rear end of the side member body, the side member body and the rear panel are welded together by spot welding or the like.
The side member body functions as the frame of the vehicle body, so the thickness of the side member body is increased to provide sufficient strength to withstand the load. On the other hand, the rear panel, which functions as the outer panel of the car body, is made thinner than the side members because no load is directly applied to it, and because it is a large component, it easily deforms and is difficult to ensure precision in terms of assembly technology. Ta. For this,
For example, when welding the rear panel upper g and the paired rear panel lower d to the flange c of the side member main body b supporting the floor panel a as shown in FIGS. Gap e
There are cases where spot welding is performed in a deformed state with . In such a case, the rear panel d, which has weak surface rigidity,
The distortion caused by the spot dents becomes more pronounced on the side. In particular, spot welding involves applying heat to a portion of the weld to form a weld, so that distortion inevitably appears on the rear panel d side, which has a weak surface rigidity, resulting in a deterioration in appearance quality. Improving the appearance quality is important as well as improving the vehicle's power performance, and users in particular tend to look for cars with good appearance quality. Therefore, in the past, severe spot dents required a repair process such as applying solder or putty to the spot dents and then polishing, which caused problems in terms of workability.

Therefore, the purpose of this invention was to propose a car body structure that can suppress distortion caused by spot dents to a minimum level that does not affect the appearance quality when welding and fixing car body panels that function as car body outer panels. be.

In order to achieve the above object, in this invention, an intermediate bracket having a thickness thinner than that of the side member body is provided at the rear end portion of the side member body, and a plate of the intermediate bracket is attached to the intermediate bracket. The body structure is made of thicker body panels that are welded together.

An embodiment of the invention will be described in detail below with reference to the drawings of FIGS. 3 and 4.

In FIG. 3, numeral 1 indicates a side member that functions as a frame of the vehicle body.

The side member 1 consists of a rear side member main body 3 and a rear side member extension 5, and the joint between the rear end of the rear side member main body 3 and the front end of the rear side member extension 5 is welded by spot welding or the like. has been done. A trunk floor panel 7 is provided on the upper surface of the side member 1, and at the rear end of the floor panel 7 there is a body panel that is long in the width direction of the vehicle, and in this embodiment, a pair of rear panel uppers (not shown). A rear panel lower 9 is provided. Upper flange portion 11 of rear panel lower 9
is welded to the lower surface of the trunk floor 7, and the inside of the general surface 13 is connected to the side member 1 via an intermediate bracket 15. The plate thickness of the rear panel lower 9 is thicker than that of the intermediate bracket 15, and the intermediate bracket 15 is formed thinner than the plate thickness of the side member 1. In this embodiment, the plate thickness of the side member 1 is 1.2 mm, and the intermediate bracket 15 is Bracket 15 plate thickness is 0.6mm, rear panel lower 9
The thickness of the plate is 0.9mm.

On the other hand, the intermediate bracket 15 includes a U-shaped bracket main body 17 and substantially vertical flange parts 19, 19 provided on both sides of the main body 17.
The main body portion 17 of the bracket is welded to the inside of the side member 1, and the flange portion 19 is welded to the general surface 13 of the lower rear panel 9 by spot welding or the like.

In the vehicle body structure configured in this way, if the general surface 13 is made to correspond to the rear panel lower 9 on the flange portions 19, 19 of the intermediate bracket 15, the flange portion 19 of the intermediate bracket 15 will correspond to the rear panel lower 9.
Because it is thinner than the thickness of the plate, surface contact occurs even when the rear panel lower 9 is deformed. In this state, the general surface 13
When the and flange portion 19 are spot welded, the strain deformation during welding occurs largely on the inner intermediate bracket 15 side where surface rigidity is low, and hardly appears on the surface of the rear panel lower 9. This results in
The appearance quality can be improved.

FIG. 5 shows another embodiment. A flange 2 is provided at the rear end of the side member 1 in this embodiment.
1 and 21 are integrally and continuously molded. Further, the intermediate bracket 15 is made up of a general surface 23 which is welded to the flanges 21, 21, and flange portions 25, 25 provided on both sides of the general surface 23 and which are welded to the general surface 13 of the rear panel lower 9. , the intermediate bracket 15 is set to have a thickness thinner than that of the rear panel lower 9. Further, a corner portion 27 connecting the general surface 23 and the flange portion 25 is formed into a corrugated plate shape to absorb strain and deformation during welding.

Therefore, the intermediate bracket 15 of this embodiment
The flange portion 25 and the general surface 1 of the rear panel lower 9
The strain and deformation that occurs during spot welding with No. 3 is absorbed by the difference in plate thickness and the corner portions 27.

As a result, almost no distortion or deformation occurs on the rear panel 9 side, so that the appearance quality can be improved.

FIG. 6 shows another embodiment of the intermediate bracket 15. The intermediate bracket 15 of this embodiment is
It is formed of a pair of left and right bracket main parts 33, 33, each consisting of a side wall 29 spot-welded to the rear side member 1 and a flange part 31 spot-welded to the general surface 13 of the rear panel lower 9. The thickness of the plate is made thinner than that of the rear panel lower 9.

Therefore, according to this embodiment, it is possible to weld the side member 1 which does not require the rear side member extension 5 to the surface of the rear panel lower 9 while keeping spot dents small. Thereby, the appearance quality of the rear panel 9 can be improved.

As explained above, according to the vehicle body structure of this invention, it is possible to suppress the spot distortion during welding on the surface of the vehicle body panel, which has the advantage of omitting the repair process and improves the appearance quality. become.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams showing a conventional car body structure, Figure 3 is an exploded perspective view showing the car body structure according to this invention, Figure 4 is an explanatory diagram similar to Figure 2, and Figure 5 is an explanatory diagram showing a conventional car body structure.
The figure is an exploded perspective view showing another embodiment, and FIG. 6 is an exploded perspective view showing another embodiment. Explanation of main drawing symbols: 1...Side member, 9...Vehicle body panel, 15...Intermediate bracket.

Claims (1)

[Scope of utility model registration request] An intermediate bracket having a thickness thinner than that of the member body is provided at the rear end of the side member body, and a vehicle body panel having a thickness thicker than the intermediate bracket is welded to the intermediate bracket. Characteristic car body structure.