JPH06166385A - Fitting structure or rear floor - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a mounting structure for a rear floor so that stress is not concentrated around the welded portion of a joint of a frame or a panel. [Structure] U-shaped side frame 4 with an opening at the top
And a floor panel 3 that extends from the end 5 of the side frame of the opening to one side and closes the opening, and a wheel house 2 that is connected to the end 5 of the side frame and extends upward. In the structure, at the inside inner corner formed by the floor panel 3 and the wheel house 2,
One end is connected to the floor panel 3 and the other end is the wheel house 2
And a reinforcement 6 connected to the. Since the triangular structure is formed at the inner corner portion and the rising portion of the wheel house 2 has the overlapping structure, the rigidity can be increased in a wide range and the change in the strength of each part can be made small and smooth. it can. As a result, stress concentration is eliminated, the plate thickness of each part can be reduced, and the cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear floor mounting structure for increasing the rigidity of an automobile body.

[0002]

2. Description of the Related Art Generally, a vehicle body of an automobile is formed by connecting frames to each other and fixing panels to each other, so that the strength of a joint is not reduced. For example, as shown in FIGS. 6 and 7, at a location a located on the wheel of the automobile 1, the curved wheel house 2 is formed as a single body and welded to the floor panel 3. Further, as shown in FIG. 8 or FIG.
Welded to maintain strength.

The above wheel house 2 and floor panel 3
The connection with the side frame 4 will be described with reference to a cross-sectional view. As shown in FIG. 10, the side frame 4 having a U-shape that opens upward and one end from the opening end 5
In addition, the floor panel 3 that closes the opening and the opening end 5
It is composed of a wheel house 2 connected to
The opposite side of the opening end 5 of the side frame 4 is bent at a right angle and is welded to the floor panel 3 with its flat surface in contact. At the opening end 5, the end of the floor panel 3 is bent upward, and the ends of these three members are in flat contact with each other and welded together. The points where welding is performed are indicated by arrows.
Further, such a structure of the wheel house 2 is also disclosed in Japanese Utility Model Laid-Open No. 60-16683. Further, the connection structure of each member is also disclosed in Japanese Utility Model Laid-Open No. 1-138870.

[0004]

By the way, if the strength of the portion where the seam is welded is too strong, the strength of this portion and the periphery are greatly different, and stress concentration is likely to occur.
Further, in order to secure the strength, if the number of members is increased or the plate thickness is increased as in the above publication, the cost is increased and the weight is increased. In the structure shown in FIG. 10, the strength of the end portion of the wheel house 2 (opening end portion 5) is large because the three plates are overlapped, but stress concentration is likely to occur in the surroundings, so the plate thickness is reduced as a whole. I had to reinforce it by making it bigger.

It is an object of the present invention to provide a rear floor mounting structure in which stress is not concentrated around the welded portions of the joints of frames and panels.

[0006]

In order to achieve the above object, the present invention is directed to a U-shaped side frame having an opening at the top and one end of the side frame of the opening, In a rear floor mounting structure composed of a floor panel that closes an opening and a wheel house that is coupled to an end of the side frame and extends upward, an inner interior angle formed by the floor panel at the end of the opening and the wheel house The portion is provided with a reinforcement having one end connected to the floor panel and the other end connected to the wheel house.

Further, in the above-mentioned rear floor mounting structure, the end portion of the side frame of the opening is extended upward and coupled to the wheel house.

Further, in the above-mentioned rear floor mounting structure, the side frame at the end of the opening is extended upward and coupled to the wheel house, and the end of the wheel house is bent along the opening, It is characterized in that the front end of the floor panel is bent obliquely upward and coupled to the wheel house.

[0009]

Since the present invention is configured as described above, a triangular structure by reinforce is formed at the joint between the side frame, the floor panel and the wheel house, and the rising portion of the wheel house has a superposed structure. Therefore, the rigidity can be increased in a wide range.

Further, since the end portion of the side frame has a superposed structure with the wheel house, it is possible to gradually reduce the change in the plate thickness at the welded portion and its periphery. Further, since the triangular structure is formed by the floor panel, the weight can be suppressed and the rigidity can be increased in a wide range.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the structure of the frame at the position where the wheel of the automobile is mounted is defined by the floor panel 3 and the wheel house 2 with the side frame 4 and the wheel house 2 welded to the end 3a of the floor panel 3. A reinforcement 6 is provided at the inner corner of the inside. Side frame 4
Is formed in a U shape with an opening at the top, and the opening end 5
Further, the end portion 3a of the floor panel 3 and the end portion 2a of the wheel house 2 which are bent upward are welded by bringing the flat surfaces into contact with each other. Also, the other end of the side frame 4 at the opening
4a is bent along the floor panel 3 and welded by bringing the flat surfaces into contact with each other.

The cross section of the central portion of the reinforcement 6 will be described with reference to FIG. 2. Triangular portions 7 are defined at the inner corners of the reinforcement 6 so as to abut the floor panel 3 and the wheel house 2, and the floor panel 3 and the wheel house. Both ends are welded to No. 2 and No. 2. Spot welding is possible as a means for performing this welding. The points where welding is performed are indicated by arrows.

By reinforcing the inner corners in this way, the rigidity can be increased over a wide range, the change in the strength of the joints can be made small and smooth, and the concentration of stress can be prevented. . Further, the plate thickness can be reduced, the cost can be reduced, and the weight can be reduced. Further, it is possible to reduce vibration noise of the automobile and improve steering stability.

Next, as another mounting structure, as shown in FIG. 3, the end 5a of the opening portion of the side frame 4 is extended to be in surface contact with the wheel house 2, and the end portion 2a of the wheel house 2 is attached.
Is bent and extended to make a surface contact with the floor panel 3. As a result, the number of panels that overlap at the joint is 3
The number of sheets becomes one sheet, two sheets, and one sheet, and the thickness of each sheet is gradually reduced.

Another mounting structure will be described with reference to FIGS. 4 and 5. As described above, this structure has the opening end 5 of the side frame 4 and the end 2a of the wheel house 2.
And the front portion of the floor panel 3 is bent obliquely, and the wheel house 2 and the floor panel 3 form a triangular portion 7 at an inner corner portion. As a result, the rigidity can be increased over a wide range, and the change in the strength of each part can be smoothed. Further, since other parts are not used, the cost can be reduced and the weight can be reduced.

[0016]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, the rigidity of the inner corner portion connected by the side frame, the wheel house and the floor panel is increased, and
It is possible to smooth changes in the strength of each part.
As a result, stress concentration is eliminated, the plate thickness of each part can be reduced, and the cost and weight can be reduced. Further, it is possible to improve vibration noise characteristics and steering stability.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a rear floor of an automobile according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a reinforcement portion at the center of the rear floor shown in FIG.

FIG. 3 is a sectional view of a central portion of a rear floor of another embodiment.

FIG. 4 is a perspective view of a main part of a rear floor of another embodiment.

5 is a sectional view of a central portion of the rear floor shown in FIG.

FIG. 6 is a perspective view of a main part of a conventional automobile.

FIG. 7 is a perspective view of a main part of a body frame of a conventional automobile.

FIG. 8 is a perspective view of a main part of a rear floor of a conventional automobile.

FIG. 9 is a perspective view of a main part of another rear floor of a conventional automobile.

10 is a cross-sectional view of the structure shown in FIG.

[Explanation of symbols]

 2 Wheelhouse 3 Floor panel 4 Side frame 5 Opening end 6 Reinforce

Claims (3)

[Claims] 1. A U-shaped side frame having an upper opening, a floor panel extending from one end of the side frame to one side of the opening, and closing the opening, and an end of the side frame. In the mounting structure of the rear floor, which is formed by combining and extending upwardly with the wheel house, in the inner corner portion formed by the floor panel and the wheel house,
A rear floor mounting structure having a reinforcement with one end connected to a floor panel and the other end connected to a wheel house. 2. A U-shaped side frame having an upward opening, a floor panel extending from one end of the side frame of the opening to one side and closing the opening, and an end of the side frame. A rear floor mounting structure comprising a wheel house coupled to and extending upward, wherein an end of a side frame of the opening extends upward and is coupled to the wheel house. 3. A U-shaped side frame that opens upward, a floor panel that extends from the end of the side frame to one side and closes the opening, and an end of the side frame. In a rear floor mounting structure configured with a wheel house that is coupled and extends upward, the end portion of the side frame of the opening portion extends upward and is coupled to the wheel house, and the end portion of the wheel house is disposed in the opening portion. A mounting structure for a rear floor, characterized in that the rear floor panel is bent along the same direction and the tip of the floor panel is bent obliquely upward and coupled to the wheel house.