JPH058758A - Coupling structure for front part of vehicle body of automobile - Google Patents

Abstract

PURPOSE:To align a surface of a front side member outside of a vehicle with surface of a reinforcement outside of the vehicle during fastening a two hook plate. CONSTITUTION:A fitting part 18 composed of barrings 11c and holes 13d adapted to be fitted together is provided between a cross member 11 having a closed rectangular cross-sectional shape and a reinforcement 13 inserted and positioned in the vehicle-widthwise end part of the front cross-member 11 so as to limit the position of the reinforcement 13, relative to the cross-member 13. Further, a play C which allows the reinforcement 13 to move vehicle-widthwise. When a two hook plate 15 is fastened to a surface A of the cross-member 11 outside of the vehicle and a surface B of the reinforcement 13 outside of the vehicle, the reinforcement 13 moves in the vehicle-widthwise direction so that the surface B thereof aligns with the surface A of the front side member 12, thereby it is possible to fasten the tow hook plate 15 with an appropriate posture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure for a front portion of a vehicle body of an automobile, and more particularly to a connecting structure for fastening a pulling hook plate to a front side member and a front cross member.

[0002]

2. Description of the Related Art FIGS. 7 to 10 show a conventional example of a connecting structure for a front portion of a vehicle body. In the figure, 1 is a front cross member and 2 is a front side member. Reference numeral 3 denotes a reinforcing member that is inserted and arranged at the end of the front cross member 1, and is fixed to one or both of the front cross member front panel 1a and the front cross member rear panel 1b of the front cross member 1 by spot welding or the like. The reinforcing member 3 includes a bracket 3a and a collar 3b, and a nut 3c for fastening the pulling hook plate 5 is welded to the bracket 3a.

In addition, at the end portion of the front side member 2 constituted by the front side member inner plate 2a and the front side member outer plate 2b,
A reinforcement 4 is inserted, and a nut 4a for fastening the hook plate 5 is welded to the reinforcement 4. Then, the bolt 6 is passed through the collar 3b of the reinforcing member 3 and fastened to the nut 2c welded to the front side member 2 to fix the front cross member 1 to the front side member 2 and then to the towing hook plate 5. The pulling hook plate 5 is connected to the front side member 2 and the reinforcing member 3 by tightening the bolt 7 passed through the nuts 3c and 4a.

[0004]

However, in the above-described conventional coupling structure, the reinforcing member 3 is fixed to either one or both of the front cross member front panel 1a and the front cross member rear panel 1b.
The vehicle outer surface A of the front side member outer panel 2b, which is the tightening surface of the towing hook plate 5, and the vehicle outer surface B of the reinforcing member 3 may not match due to variations in component accuracy, assembly accuracy, and the like. As a result, in the worst case, the pulling hook plate 5 cannot be attached, or even if the pulling hook plate 5 is attached, the required performance (the bolt 7 is not loose and is capable of withstanding the pulling force without being deformed) due to a poor mounting posture. May not be able to demonstrate.

In the case where the reinforcing member 3 is fixed to both the front cross member front panel 1a and the front cross member rear panel 1b by spot welding, the front portion of the front cross member front panel 1a is indicated by a phantom line in the figure. It is necessary to cut the panel into a structure that enables welding work, and cutting the panel in this way is not preferable from the viewpoint of strength and rigidity of the vehicle body.

In view of the above problems, the present invention has been improved so that the vehicle outer surface of the front side member and the vehicle outer surface of the reinforcing member can be aligned with each other when the tow hook plate is fastened. Providing a front coupling structure is a technical problem to be solved.

[0007]

In order to solve the above problems, the present invention is configured as follows. That is, the vehicle outer surface of the front side member that forms a rectangular closed cross section and the vehicle outer surface of the reinforcing member that is inserted and arranged in the vehicle width direction terminal portion of the front cross member that forms a rectangular closed cross section are used for towing. A connecting structure for a front portion of a vehicle body, which abuts and fastens a hook plate, wherein the front cross member and the reinforcing member are fitted to each other so as to regulate the position of the reinforcing member with respect to the front cross member. And a play is set in the fitting portion to allow movement of the reinforcing member in the vehicle width direction.

[0008]

In the coupling structure according to the present invention constructed as described above, the reinforcing member arranged at the end portion of the front cross member is within the play set in the fitting portion within the closed cross section. Since it freely moves in the vehicle width direction, when the tow hook plate is fastened to the vehicle outer side surface of the front side member and the vehicle outer side surface of the reinforcing member, the both sides are aligned.

[0009]

Embodiments of the present invention will be specifically described below with reference to the drawings. First, the embodiment shown in FIGS. 1 to 4 will be described. As shown in FIG. 3, the reinforcing member 13 includes a U-shaped bracket 13a and a collar 13b, and a nut 13c for fastening the pulling hook plate 15 is welded to the side surface of the bracket 13a. Cage,
Further, circular holes 13d are formed on the upper surface and the lower surface of the bracket 13a at symmetrical positions with the collar 13b interposed therebetween.

As shown in FIG. 1, the front cross member 11 is formed into a rectangular closed cross section by a front cross member front panel 11a and a front cross member rear panel 11b, and has a lower surface portion of the front cross member front panel 11a. , The front cross member rear panel 11b and the upper surface of the hole 1 of the reinforcing member 13
Inward circular burrings 11c are formed at the portions corresponding to 3d.

When the front cross member front panel 11a and the front cross member rear panel 11b are joined to each other, the reinforcing member 13 is used for the bracket 13.
Fit the hole 13d of a into the corresponding burring 11c,
Thereafter, the front cross front panel 11a and the front cross rear panel 11b are joined by spot welding or the like to form the front cross member 11.

Thus, the reinforcing member 13 is fixed to the front cross member 11, but in this case, the fitting portion 18 formed of the burring 11c and the hole 13d has some play or play. C is set. As a result, the reinforcing member 13 is allowed to move in the front cross member 11 in the axial direction (vehicle width direction) and the width direction (vehicle front-rear direction). In addition, with respect to the vertical dimension of the front cross member 11,
The upper and lower dimensions of the reinforcing member 13 are the same, but are set with a negative tolerance.

FIG. 4 shows a connecting portion between the front cross member 11 and the front side member 12. The connection between the two members 11 and 12 is basically the same as the conventional one, and is performed by tightening the bolt 16 passed through the collar 13b to the nut 12c welded to the lower end portion of the end of the front side member 12. .. In this case, bolt 1
The outer diameter of 6 and the inner diameter of the bolt through hole formed in the reinforcing member 3 are defined as the fitting portion 1 between the burring 11c and the hole 13d.
A play corresponding to the play C set to 8 is set.

The front side member 12 is formed into a rectangular closed cross section by a front side member inner plate 12a and a front side outer plate 12b, and a reinforcement 14 is inserted into the end portion of the front side member 12a. A nut 14a for fastening the pulling hook plate 15 is welded to the hosement 14.

The pulling hook plate 15 is
By fastening the bolt 17 to the nuts 13c and 14a, the vehicle outer side surface A of the front side member 12 and the vehicle outer side surface B of the reinforcing member 13 are joined together.
In this case, the reinforcing member 13 can move in the vehicle width direction within the play C set in the fitting portion 18 including the burring 11c and the hole 13d in the front cross member 11, so that the bolt 17 is tightened. The position in the vehicle width direction is corrected accordingly, and the vehicle outer side surface B coincides with the vehicle outer side surface A of the front side member 12.

Therefore, it is possible to avoid problems such as the inability to mount the hook plate 15 and the mounting posture failure due to variations in parts accuracy and assembly accuracy. Further, the processing of the burring 11c and the hole 14d for forming the fitting portion 18 is
In the process of producing the member in which they are formed, since they can be simultaneously formed with respect to the member, this does not cause a decrease in productivity, and rather, the reinforcing member 13 does not have to be welded to the front cross member 11. Therefore, it is possible to reduce the welding process and improve the productivity.

FIGS. 5 and 6 show modifications of the structure of the fitting portion 18 between the reinforcing member 13 and the front cross member 11. That is, in the example shown in FIG. 5, the front cross member front panel 11a and the front cross member rear panel 11b are formed with bosses 11d instead of burring. In addition, the example shown in FIG.
In the lower fitting portion 18, a burring 13e is provided downward on the bracket 13a of the reinforcing member 13 and a hole 11e is provided on the front cross member front panel 11a.

Further, although not shown, it is possible to change the lower burring 13e shown in FIG. 6 to a boss, or to change all burrings and holes to bosses. Further, the shape of the fitting portion 18 does not necessarily have to be circular. In short, any structure can be used as long as the position of the reinforcing member 13 can be regulated by fitting each other due to the concavities and convexities, and if the predetermined play C is set in the fitting portion 18, the intended purpose is achieved. Can be achieved.

[0019]

As described in detail above, according to the present invention,
When installing the tow hook plate, the vehicle outer surface of the reinforcing member and the vehicle outer surface of the front side member can be aligned, so avoiding conventional problems and installing the tow hook plate as expected to achieve the required performance. Can be demonstrated. Also, since it is not necessary to fix the reinforcing member to the front cross member by spot welding, etc., it is useful for improving productivity, and the reinforcing member is welded to both the front cross member front panel and the front cross member rear panel. If so, the necessary notch is not required, which is advantageous in strength.

[Brief description of drawings]

FIG. 1 is a sectional view showing a joint structure of a vehicle body front portion of an automobile according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a front cross member and a reinforcing member arranged at a terminal of the front cross member.

FIG. 3 is a perspective view showing a reinforcing member.

FIG. 4 is a cross-sectional view mainly showing a connecting structure of a front cross member and a front side member.

FIG. 5 is a cross-sectional view showing a modified example of a fitting portion structure.

FIG. 6 is a cross-sectional view showing another modification of the fitting portion structure.

FIG. 7 is a schematic perspective view showing a conventional vehicle body front coupling structure.

FIG. 8 is a sectional view of the same.

FIG. 9 is a perspective view showing a conventional reinforcing member.

FIG. 10 is a perspective view showing the same reinforcement.

FIG. 11 is a perspective view showing a hook plate for pulling the same.

[Explanation of symbols]

11 ... Front cross member 11c ... Burring 12 ... Front side member 13 ... Reinforcing member 13d ... Hole 15 ... Towing hook plate 16 ... Bolt 18 ... Fitting part

Claims (1)

Claim: What is claimed is: 1. A reinforcing member that is inserted and disposed in a vehicle outer surface of a front side member that forms a rectangular closed cross section and a vehicle width direction terminal portion of a front cross member that forms a rectangular closed cross section. Is a structure for connecting a front part of the vehicle body with a tow hook plate to be fastened to the outer side surface of the vehicle. The front cross member and the reinforcing member are fitted to each other to reinforce the front cross member. A joint structure for a vehicle body front portion of an automobile, wherein a fitting portion for restricting the position of a member is provided, and a play for allowing the reinforcing member to move in the vehicle width direction is set in the fitting portion.