JPH0717430A - Body rear construction - Google Patents

Abstract

PURPOSE:To provide the rear part construction of a vehicle which insures a space under a floor, improves fitting rigidity of a bumper, and can improve the strength of a hook for traction without causing increase in the weight. CONSTITUTION:A hook bracket 12 is constituted mainly of a pair of side parts 13, 13, and a bottom face part 14 connecting together both side parts 13, 13, and formed into a nearly U-shaped section. The hook bracket 12 is arranged along the longitudinal direction of a vehicle, and a closed sectional construction is constituted of the bottom wall part 1c of a rear side member 1, the bottom wall part 2d of a rear end cross 2, and the hook bracket. An L-shaped hook bracket 16a of a hook 16 for traction is arranged extending from the one side part 13 to the bottom face part 14 of the hook bracket 12. Further, a pair of right and left bumper stays 5a, 5a for fixing a bumper are inserted and arranged inside the U-shaped parts constituted of the bottom face parts 14 and both side parts 13, 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body rear structure of a rear bumper of a vehicle to which a stay and a tow hook are attached.

[0002]

2. Description of the Related Art Conventionally, as this type, for example, there is one as shown in FIGS. In this vehicle body rear structure, the rear end portion 1a of the rear side member 1 arranged along the vehicle front-rear direction is fixed so as to abut against the rear end cross 2 arranged along the vehicle width direction. .

In the vicinity of this fixed portion, the towing hook 3
Are fixed to the lower surface of the rear side member 1 by the bolts 4 and 4 via the hook bracket 3a.

An opening 2b is formed in the rear wall 2a of the rear end cross 2, and the bumper stay 5a is fixed in a state of being inserted into the opening 2b, and the rear bumper 5 is supported by the bumper stay 5a. It is like this.

On the upper surfaces of the rear side member 1 and the rear end cross 2, there is arranged a rear floor panel 7 which constitutes the bottom of the luggage room 6.

Examples of this type include those described in Japanese Utility Model Publication No. 64-44806, Japanese Utility Model Publication No. 63-21181, and the like.

[0007]

However, in such a conventional one, when an underfloor space is secured on the lower surface side of the rear floor panel 7 by arranging the spare tire under the floor or the like, the position of the rear floor panel 7 is arranged. Inevitably rises, and the position at which the rear end cross 2 where the bumper stay 5a is attached must be raised. On the other hand, the bumper 5 cannot be moved up so much in consideration of impact absorption and the like. As a result, as shown by the chain double-dashed line in FIG. 8, the bumper stay 5a has a crank shape or the like, and the mounting position of the bumper 5 on the bumper stay 5a is downward with respect to the mounting position of the bumper stay 5a on the rear end cross 2. When offset,
When an impact load is input to the bumper 5, the bumper stay 5a is easily deformed, and the impact absorbability of the bumper 5 may be reduced.

Further, since the tow hook 3 is attached to the rear side member 1, the dimensions A and B become large in order to face the lower side of the bumper 5. Therefore, since a large bending moment acts during towing, it is necessary to take measures such as thickening the towing hook 3 in order to secure the strength, which may lead to an increase in weight.

Therefore, the present invention provides a vehicle rear portion structure capable of improving the mounting rigidity of a bumper while securing an underfloor space and improving the strength of a towing hook without increasing the weight. It is an issue.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an end surface of a rear end portion of a rear side member arranged along a vehicle front-rear direction is arranged along a vehicle width direction. The rear end cross is fixed in a state of abutting against the side portion of the rear end cross, and a hook bracket is attached to the lower side of the fixed portion so as to straddle the rear side member and the rear end cross. In the vehicle body rear structure having a hook attached thereto, the hook bracket is formed in a substantially U-shaped cross section from a pair of side surface portions and a bottom surface portion connecting the side surface portions, and is arranged along the vehicle front-rear direction. And a closed cross-section structure is formed with the rear end cross, and the bumper stay and the towing hook are attached to a portion of the hook bracket located below the rear end cross. It is characterized in that the body rear structure.

[0011]

[Operation] According to such means, the hook bracket is
By forming a substantially U-shaped cross section from a pair of side surface portions and a bottom surface portion that connects the side surface portions, and arranging over the rear side member and the rear end cross, and forming a closed cross section with the rear end cross. , With high rigidity. Then, the bumper stay and the towing hook are attached to the portion of the hook bracket located below the rear end cross.

Therefore, since the mounting position of this bumper stay on the vehicle body can be located lower than the conventional one, there is no need to offset it as in the conventional case, and the part to which this bumper stay is mounted has a high rigidity.
Even when an impact load is applied to the bumper, the bumper stay is not easily deformed, and this load can be effectively transmitted from the hook bracket to the rear end cross, etc., and the impact absorption is improved.

Further, since the tow hook is also attached to the portion of the hook bracket located below the rear end cross, the amount of downward extension and rearward extension can be made shorter than in the conventional case. A large bending moment does not occur, and a large traction force can be loaded even when the size and weight are reduced.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 show an embodiment of the present invention. The same or equivalent members as the conventional ones will be described with the same reference numerals.

In the first embodiment, the rear end portions 1a, 1a of the pair of left and right rear side members 1, 1 arranged along the vehicle front-rear direction are arranged along the vehicle width direction. It is fixed so as to abut against the rear end cross 2 provided. A hook bracket 12 is provided at a portion where the rear side member 1 and the rear end cross 2 are fixed to each other.
It is installed across and.

Specifically, the rear side member 1 is formed in a substantially U-shaped cross section mainly from the side wall portions 1b, 1b and the bottom wall portion 1c connecting the side wall portions 1b, 1b. Both side wall portions 1 of the rear end portion 1a of the rear side member 1
b and 1b are respectively formed with flange portions 11 and 11 which are fixed to the front wall portion 2c of the rear end cross 2 by being in contact therewith, and the bottom wall portion 1c of the rear end portion 1a has the rear end cross portion 2c. A bottom plate contact portion 1d fixed to the bottom wall portion 2d is formed so as to project rearward of the vehicle. Further, panel flange portions 1e, 1e fixed to the rear floor panel 7 are formed at the upper ends of the both side wall portions 1b, 1b.

The rear end cross 2 has a front wall 2
c, a rear wall portion 2a and a bottom wall portion 2d are formed in a substantially U-shaped cross section, and a panel flange portion 2e fixed to the rear floor panel 7 is formed at an upper end portion of the front wall portion 2c. The upper end edge of the rear wall portion 2a is joined to the rear end standing wall portion 7a of the rear floor panel 7, and the floor panel 7 and the rear end cross 2 form a closed cross section.

Further, the hook bracket 12 is mainly composed of a pair of side surface portions 13 and 13 and a bottom surface portion 14 connecting the side surface portions 13 and 13, and has a substantially U-shaped cross section. The bottom surface portion 14 is configured so that the vehicle rear portion 14a is located lower than the vehicle front portion 14b. An insertion hole for inserting the bolt 4a for attaching the hook is formed in the vehicle rear portion 14a.
Further, flange portions 15, 15 are formed on a part of the upper end edges of the both side surface portions 13, 13. The flange portion 15 is a vertical flange portion 15 fixed to the front wall portion 2c.
a and a horizontal flange portion 15 fixed to the bottom wall portion 2d
It is mainly composed of b and b.

The hook bracket 12 is arranged along the longitudinal direction of the vehicle so that the bottom wall portion 1c of the rear side member 1 and the bottom wall portion 2d of the rear end cross 2 form a closed cross-section structure. I have to.

The hook bracket 12 is provided with an L-shaped hook bracket 16a of a towing hook 16 extending from the one side surface portion 13 to the bottom surface portion 14. Further, bumper stays 5a, 5a for fixing the bumper 5 are inserted inside the U-shaped portion formed by the bottom surface portion 14 and the side surface portions 13, 13 to provide a left and right pair. The L-shaped hook bracket 16a and the bumper stay 5a are fastened together by bolts 4a, nuts 4b and the like to the vehicle rear portion 14a of the bottom surface portion 14 of the hook bracket 12 so as to be fixed. .

The bumper stay 5a has a substantially U-shaped cross section, and has insertion holes 5b ... Into which the bolts 4a are inserted in the bottom plate and the side plates.

The towing hook 16 is mainly fixed to the L-shaped hook bracket 16a and the L-shaped hook bracket 16a, and in the installed state, the bottom portion 1 is provided.
4 and a hook main body 16b formed by bending a metal rod into a substantially U shape protruding downward.

On the upper surfaces of the rear side member 1 and the rear end cross 2, there is arranged a rear floor panel 7 which constitutes the bottom surface of the luggage room 6. A spare tire (not shown) is arranged on the lower surface side of the rear floor panel 7 so as not to reduce the luggage space in the luggage room 6.

Next, the operation will be described. In the vehicle body rear structure of this embodiment configured as described above, the hook bracket 12 includes the pair of side surface portions 13, 13 and the side surface portion 1.
By forming a closed cross-section with the rear end member 2 and the rear side member 1 and the rear end cross 2, the cross-section is formed in a substantially U-shape from the bottom surface portion 14 that connects the members 3 and 13. It has high rigidity. Then, the bumper stay 5a and the towing hook 3 are attached to the portion of the hook bracket 12 located below the rear end cross 2.

Therefore, since the mounting position of the bumper stay 5a on the vehicle body can be located lower than in the conventional case, there is no need to offset the bumper stay 5a as in the conventional case, and the portion to which the bumper stay 5a is mounted has high rigidity. Even when an impact load is applied to the bumper 5, the bumper stay 5a is not easily deformed, and this load is applied from the hook bracket 12 to the rear end cross 2.
Can be effectively transmitted, and shock absorption is improved.

Further, since the tow hook 3 is also attached to the portion of the hook bracket 12 located below the rear end cross 2, the amount of downward extension and rearward extension can be made shorter than before. As a result, a large bending moment does not occur, and a large traction force can be provided even when the size and weight are reduced.

Moreover, in the vehicle body rear structure of this embodiment,
Since the bumper stay 5a is inserted into the hook bracket 12 and fastened together with the L-shaped hook bracket 16a, the bumper stay 5a serves as a reinforcing material and further improves the mounting rigidity of the towing hook 12. You can Therefore, the bumper stay 5a and the towing hook 1 are secured while the capacity of the luggage room 6 is secured.
The mounting rigidity of 6 can also be improved.

[0029]

As described above, according to the present invention, the hook bracket is formed in a substantially U-shaped cross section from the pair of side surface portions and the bottom surface portion connecting the side surface portions, and the rear side member and the rear end are formed. It has a high rigidity because it is disposed straddling the cross and forms a closed cross section with the rear end cross. Then, the bumper stay and the towing hook are attached to the portion of the hook bracket located below the rear end cross.

Therefore, since the mounting position of this bumper stay on the vehicle body can be located lower than the conventional one, there is no need to offset it as in the conventional case, and since the part to which this bumper stay is mounted has high rigidity,
Even when an impact load is applied to the bumper, the bumper stay is not easily deformed, and this load can be effectively transmitted from the hook bracket to the rear end cross, etc., and the impact absorption is improved.

Further, since the tow hook is also attached to the portion of the hook bracket located below the rear end cross, the amount of downward extension and rearward extension can be made shorter than before, and as a result, Therefore, a large bending moment does not occur, and a large traction force can be exerted even when the size and weight are reduced, which is a practically useful effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts showing a vehicle body rear structure according to an embodiment of the present invention.

FIG. 2 is a view showing a rear structure of a vehicle body of the same embodiment, which corresponds to C- in FIG.
It is sectional drawing which followed the C line.

FIG. 3 shows a vehicle body rear structure of the same embodiment, and
It is sectional drawing which followed the D line.

FIG. 4 shows a rear structure of a vehicle body of the same embodiment, which is indicated by E- in FIG.
It is sectional drawing which followed the E line.

FIG. 5 is a perspective view showing a rear portion of the vehicle body.

FIG. 6 is an exploded perspective view showing a main part of a conventional vehicle body rear structure.

FIG. 7 is a sectional view taken along the line FF of FIG. 6, showing a vehicle body rear structure of a conventional example.

8 is a sectional view taken along the line GG in FIG. 6, showing a vehicle body rear structure of a conventional example.

[Explanation of symbols]

 1 rear side member 2 rear end cross 3 towing hook 5a bumper stay 12 hook bracket 13 side 14 bottom

Claims (1)

[Claims] 1. A fixing method in which an end surface of a rear end portion of a rear side member arranged along the vehicle front-rear direction is fixed in a state of abutting against a side surface portion of a rear end cross arranged along the vehicle width direction, A hook bracket is attached to the lower side of the portion so as to straddle the rear side member and the rear end cross,
A vehicle body rear structure in which a bumper stay and a towing hook are attached to the hook bracket, wherein the hook bracket is formed in a substantially U-shaped cross section from a pair of side surface portions and a bottom surface portion connecting the side surface portions. It is arranged along the front-rear direction and forms a closed cross-section structure with the rear end cross, and the bump pasty and the towing hook are attached to a portion of the hook bracket located below the rear end cross. The rear structure of the car body.