JPH09240510A - Body rear part structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve rigidity of a part around rear strut towers. SOLUTION: Shock absorber attached brackets 5 on the upper ends of rear strut towers 4 formed on rear wheel house inners 1 are connected to a lower wall 11 of a rear parcel member 7, reinforces 13 for surrounding shock absorber connecting parts 5a and extending over the lower wall 11 and the upper wall 9 of the rear parcel member 7 are connected and arranged, closed section parts 14 for surrounding the part of the shock absorber connecting parts 5a are formed, and therefore, partial deformation of the lower wall 11 and the upper wall 9 is eliminated, and the transmission efficiency of the suspension input to the rear parcel member 7 can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear structure of an automobile body, and more particularly to a structure around a rear strut tower for connecting a shock absorber of a rear suspension.

[0002]

2. Description of the Related Art Among rear strut tower structures for automobiles, the rear strut tower is provided at a side portion of a rear wheel house inner, and is disposed above the rear parcel member having a closed sectional structure extending in the vehicle width direction. In the so-called low mount type structure, it is necessary to connect and arrange the strut tower bars across the left and right rear strut towers in order to secure the inward falling rigidity of the rear strut tower.

On the other hand, instead of such a low mount type structure, a rear strut tower is provided on the upper surface portion of the rear wheel house inner and extends upward as shown in, for example, Japanese Unexamined Patent Publication No. 5-213234. A so-called high mount type structure has been proposed in which the rear parcel members are abutted and joined to each other by striking them out and straddling the side surfaces of the left and right rear strut towers.

[0004]

In the above-described high mount type structure, the rear parcel member can function as a strut bar to secure the inward falling rigidity of the rear strut tower, but the suspension input in the vertical direction is rear The joint portion between the strut tower and the rear parcel member acts in the shearing direction, which is disadvantageous in terms of strength.

Therefore, it is considered that the rear strut tower is butt-joined to the lower wall of the rear parcel member to form a high mount type structure. Even if it is joined to the wall, the rear parcel member constitutes a skeleton member having a closed cross section, but since the lower wall itself is a single panel and the rear parcel member has a large thin section, the vertical direction The suspension input may locally act on the lower wall to cause cross-sectional deformation of the rear parcel member.

Therefore, according to the present invention, the rear parcel member is not locally deformed, so that the rigidity in the vehicle width direction and the rigidity in the vertical direction of the rear strut tower can be enhanced, and the rigidity in the front-rear direction can also be enhanced. It provides the structure.

[0007]

According to a first aspect of the present invention, there is provided a rear parcel member having a closed cross-section structure in which a shock absorber mounting bracket formed at an upper end of a rear strut tower formed in a rear wheel house inner extends in a vehicle width direction. It is connected to the lower wall and surrounds the shock absorber connecting portion of the shock absorber mounting bracket to jointly arrange a reinforcement over the lower wall and the upper wall of the rear parcel member to close the shock absorber connecting portion. It is characterized in that a cross section is formed.

According to a second aspect of the present invention, the side edge portion of the rear strut tower according to the first aspect, including the side edge portion of the shock absorber mounting bracket, is wholly joined to the rear pillar inner. .

According to a third aspect of the present invention, the shock absorber is attached to the upper wall of the rear parcel member according to the first and second aspects of the present invention by inclining downwardly to the side at the portion corresponding to the rear strut tower connection. It is characterized in that an inclined wall that is joined to the bracket surface is formed, a working hole is formed in a portion above the shock absorber connecting portion of the inclined wall, and a reinforcement is joined and arranged at a peripheral edge of the working hole.

According to a fourth aspect of the present invention, the upper wall of the rear parcel member according to the first to third aspects is integrally formed with the upper end portion of the rear seat back panel, and the side portion of the rear seat back panel is in front of the rear strut tower. It is characterized by being joined to the side surface.

[0011]

According to the first aspect of the present invention, the shock absorber mounting bracket of the rear strut tower is connected to the lower wall of the rear parcel member, the shock absorber connecting portion is surrounded, and the closed cross section is formed by the reinforcement. Therefore, the suspension input can be borne by the entire rear parcel member having the closed cross-section structure without locally deforming the lower wall of the rear parcel member, and in addition to the rigidity in the vehicle width direction and the vertical direction rigidity of the rear strut tower,
The rigidity in the front-rear direction can be increased.

According to the second aspect, in addition to the effect of the first aspect, the suspension input acting on the strut tower can be directly applied to the rear pillar which is a vertical frame member at the rear part of the vehicle body. The rigidity of can be further increased.

According to claim 3, in addition to the effects of claims 1 and 2, the inclined wall of the upper wall of the rear parcel member is joined to the shock absorber mounting bracket surface at the portion corresponding to the rear strut tower coupling portion. Since the vertical suspension input is received by the inclined wall in the vertical direction, the vertical rigidity of the rear strut tower can be further enhanced.

Further, since the working hole is formed in the inclined wall having the surface rigidity against the input of the suspension in the vertical direction and the reinforcement is joined to the periphery of the working hole, the working hole is formed in the upper wall of the rear parcel member. The decrease in rigidity can be avoided, and the original function of the rear parcel member as a strong skeletal member is not slightly impaired.

According to claim 4, in addition to the effects of claims 1 to 3, since the vertical suspension input acting on the rear strut tower can be received by the shear surface of the rear seat back panel, the vertical rigidity of the rear strut tower is increased. And the torsional rigidity of the rear part of the vehicle body can be further improved.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 4, reference numeral 1 is joined to a rear side member 2 which is a front-back skeleton member of a vehicle body floor, and a rear wheel (not shown) is sandwiched by a rear pillar inner 3 of a rear pillar which is a vertical skeleton member at a rear portion of the vehicle body. A rear wheel house inner to which a house outer is joined is shown, and a rear strut tower 4 is integrally projectingly formed on an upper surface portion thereof.

The upper end of the rear strut tower 4 is
The separately formed shock absorber mounting bracket 5 having a relatively large plate thickness is inscribed and fitted, and the peripheral portion is welded. In the present embodiment, the rear strut tower 4 is formed.
Including the mounting bracket 5, the whole is joined to the rear pillar inner 3 similarly to the rear wheel house inner 1.

The shock absorber mounting bracket 5 is embossed with a shock absorber connecting portion 5a for connecting a shock absorber of a rear suspension (not shown) to a side portion on the vehicle body center side.

The side portion of the shock absorber mounting bracket 5 opposite to the side where the shock absorber connecting portion 5a is formed has a member mounting surface 5b which is formed lower than the inclined surface 5c. At the central portion of the shock absorber mounting bracket 5, a bead portion 5d is embossed in the vehicle width direction from the shock absorber connecting portion 5a to the member mounting surface 5b to enhance surface rigidity.

A rear parcel panel 6 has a rear parcel member 7 extending in the vehicle width direction and joined to the left and right rear pillar inner members 3 at the front edge portion thereof.

The rear parcel member 7 is formed to have a closed cross-sectional structure and functions as a skeleton member in the vehicle width direction of the rear waist portion of the vehicle body. In the present embodiment, the rear parcel member 7 connected to the rear parcel panel 6 is formed. The upper wall 9 is formed by bending the upper end portion of a rear seat back panel 8 for supporting a rear seat back (not shown) toward the rear, and a substantially L-shaped member 10 is formed on the rear surface of the upper end portion of the rear seat back panel 8.
By connecting the lower wall 11 and the rear wall 12 of the rear parcel member 7
And form.

In this embodiment, each of the rear parcel panel 6 and the seat back panel 8 is divided into a center panel 6a, 8a and two side panels 6b, 8b. It may be formed as a panel.

The shock absorber mounting bracket 5 at the upper end of the rear strut tower 4 is connected to the lower wall 11 of the rear parcel member 7, and the shock absorber connecting portion 5a of the shock absorber mounting bracket 5 is surrounded to form the rear. By arranging the reinforcements 13 straddling the lower wall 11 and the upper wall 12 of the parcel member 7 in a joined manner,
A closed cross section 14 is formed surrounding the shock absorber connecting portion 5a.

In this embodiment, the notch portion 11a is formed in the side portion of the lower wall 11 of the rear parcel member 7, and the shock absorber connecting portion 5 of the shock absorber mounting bracket 5 is formed.
The peripheral portion of a and the latter half portion of the member mounting surface 5b from the inclined surface 5c are superposed and joined.

On the other hand, the upper wall 9 of the rear parcel member 7 is formed with a slanted wall 15 which is slanted obliquely downward toward the side at the side corresponding to the connection portion of the rear strut tower 4, and the lower end of this slanted wall 15 is formed. The part is overlapped and joined from the inclined surface 5c of the shock absorber mounting bracket 5 to the front half of the member mounting surface 5b.

A working hole 16 is formed in the inclined wall 15 at an upper portion of the shock absorber connecting portion 5a, and the shock absorber connecting portion 5a is formed from above through the working hole 16.
The shock absorber (not shown) can be easily connected.

Further, the reinforcement 13 is the inclined wall 1
5, the side wall 13a having a larger inclination angle and the front and rear walls 13b are formed in a substantially U shape in a plane, and the work hole 1 of the inclined wall 15 is formed in advance.
The rear edge of the reinforcement 6 is joined and arranged, and the lower edge of the reinforcement 13 is fastened and fixed to the peripheral portion of the shock absorber connecting portion 5a by a fastening member such as a bolt and nut (not shown).

As described above, in this embodiment, the side portion of the upper wall 9 of the rear parcel member 7 is formed as the inclined wall 15 from the middle, so that the upper edge of the side portion of the rear wall 12 is the side portion of the rear parcel panel 6. 6b is joined to the lower surface, and the rear edge of the inclined wall 15 is joined to the side front surface of the rear wall 12.

According to the structure of the above embodiment, the shock absorber mounting bracket 5 of the rear strut tower 4 is provided.
Is joined to the lower wall 11 of the rear parcel member 7 and surrounds the shock absorber connecting portion 5a to form a closed cross-section portion 14 by a reinforcement 13 extending between the lower wall 11 and the upper wall 9. Therefore, the strength and rigidity around the shock absorber connecting portion 5a are high, and therefore, the suspension input acting on the shock absorber connecting portion 5a can be borne by the entire rear parcel member 7, and the lower wall of the rear parcel member 7 and The upper wall 9 is not locally deformed due to stress concentration, and the transmission efficiency of the suspension input to the rear parcel member 7 is enhanced, so that the rear strut tower 4 has rigidity in the vehicle width direction (inclination rigidity) and vertical rigidity. Not only can the rigidity in the front-rear direction be increased.

In particular, in this embodiment, since the side edge portion of the rear strut tower 4 is joined to the rear pillar inner 3 of the rear pillar which is the vertical frame member at the rear of the vehicle body, it acts on the rear strut tower 4. You can load the suspension input directly to the rear pillars,
The strength and rigidity around the rear strut tower 4 can be significantly increased.

Moreover, the side portion 8b of the rear seat back panel 8 in which the upper wall 9 of the rear parcel member 7 is integrally formed.
Since the side end portion of the rear strut tower 4 is joined to the front side surface of the rear strut tower 4, the vertical suspension input acting on the rear strut tower 4 can be received by the sheer surface of the rear seat back panel 8. The vertical rigidity of No. 4 can be further enhanced, and the torsional rigidity of the rear portion of the vehicle body can be further enhanced.

Further, since the inclined wall 15 of the upper wall 9 of the rear parcel member 7 is joined to the surface of the shock absorber mounting bracket 5 at the portion corresponding to the connecting portion of the strut tower 4, the suspension input in the vertical direction is applied to this inclined wall 15. Thus, the vertical strut of the rear strut tower 4 can be further enhanced because the rear strut tower 4 can be received in the up-down direction, that is, received by the shear surface of the inclined wall 15 to favorably transmit the input to the general portion side of the upper wall 9.

Further, a working hole 16 is formed in this inclined wall 15 having a surface rigidity with respect to the vertical suspension input,
Since the reinforcement 13 is arranged so as to be joined to the periphery of the work hole 16, the work hole 1 in the upper wall 9 of the rear parcel member 7 is formed.
The reduction in rigidity due to the formation of 6 can be avoided, and the function as the original strength skeletal member of the rear parcel member is not impaired.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of one side portion of the same embodiment.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along the line BB of FIG. 2;

[Explanation of symbols]

 1 Rear Wheel House Inner 3 Rear Pillar Inner 4 Rear Strut Tower 5 Shock Absorber Mounting Bracket 5a Shock Absorber Joint 7 Rear Parcel Member 8 Rear Seat Back Panel 9 Rear Parcel Member Upper Wall 11 Rear Parcel Member Lower Wall 13 Reinforce 14 Closed Section Part 15 Inclined wall 16 Working hole

Claims (4)

[Claims] 1. A shock absorber mounting bracket at the upper end of a rear strut tower formed on a rear wheel house inner is coupled to a lower wall of a rear parcel member having a closed cross section structure extending in the vehicle width direction, and the shock absorber mounting bracket is also provided. Of the automobile characterized in that the shock absorber connecting portion is surrounded, and a reinforcement over the lower wall and the upper wall of the rear parcel member is jointly arranged to form a closed cross-section portion surrounding the shock absorber connecting portion. Rear body structure. 2. A vehicle body rear structure according to claim 1, wherein the side edge portion of the rear strut tower is directly connected to the rear pillar inner as a whole including the side edge portion of the shock absorber mounting bracket. 3. An inclined wall is formed on the upper wall of the rear parcel member at a portion corresponding to the rear strut tower connection, which is inclined obliquely downward to the side and is joined to the surface of the shock absorber mounting bracket. The vehicle body rear structure according to claim 1, wherein a working hole is formed in an upper portion of the shock absorber connecting portion and the reinforcement is joined and arranged at a peripheral edge of the working hole. 4. An upper wall of a rear parcel member is integrally formed with an upper end portion of a rear seat back panel, and a side portion of the rear seat back panel is joined to a front side surface of a rear strut tower. The vehicle body rear structure according to any one of 1.