JP3214342B2 - Car body rear structure - Google Patents

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 In a rear strut tower structure of an automobile, the rear strut tower is provided on a side portion of a rear wheel house inner, and is disposed above and separated from a rear parcel member having a closed cross-sectional structure extending in a vehicle width direction. In the so-called low-mount type structure, it is necessary to connect and arrange 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, in place of such a low-mount type structure, a rear strut tower is provided on an upper surface portion of a rear wheel house inner and extended upward as shown in, for example, Japanese Patent Application Laid-Open No. Hei 5-213234. A so-called high-mount type structure has been proposed in which the above-mentioned rear parcel members are joined by striking and joining the side surfaces of the left and right rear strut towers.

[0004]

In the above-mentioned 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. The joint between the strut tower and the rear parcel member acts in an unfavorably strong shear direction.

Therefore, it is conceivable to form a high-mount type structure by joining the rear strut tower to the lower wall of the rear parcel member and joining the rear strut tower to the lower parcel member. Even if the rear parcel member is joined to the wall, the rear parcel member constitutes a skeletal member having a closed cross section. However, since the lower wall itself is a single panel and the rear parcel member has a thin large cross section, May act locally on the lower wall to cause a cross-sectional deformation of the rear parcel member.

Therefore, the present invention eliminates the local deformation of the rear parcel member, thereby increasing the rigidity in the vehicle width direction and the rigidity in the vertical direction of the rear strut tower, and increasing the rigidity in the front-rear direction. Provides structure.

[0007]

According to a first aspect of the present invention, a shock absorber mounting bracket at the upper end of a rear strut tower formed in a rear wheel house inner is provided with a rear parcel member having a closed sectional structure extending in a vehicle width direction. A closure which is connected to the lower wall and surrounds the shock absorber connecting portion of the shock absorber mounting bracket and joins and arranges a reinforce straddling the lower wall and the upper wall of the rear parcel member to surround 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 edges of the rear strut tower according to the first aspect, including the side edges of the shock absorber mounting bracket, are entirely joined to the rear pillar inner. .

According to a third aspect of the present invention, a shock absorber is mounted on the upper wall of the rear parcel member according to the first and second aspects, at a portion corresponding to a rear strut tower, inclined obliquely downward toward the side. An inclined wall to be joined to the bracket surface is formed, a working hole is formed in a portion of the inclined wall above the shock absorber connecting portion, and a reinforce is joined to a periphery of the working hole.

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

[0011]

According to the first aspect, the shock absorber mounting bracket of the rear strut tower is connected to the lower wall of the rear parcel member, and a closed cross-section is formed by the reinforcement around the shock absorber connecting portion. As a result, the suspension input can be borne by the entire rear parcel member having a closed cross-section structure without local deformation of the lower wall of the rear parcel member, and 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 borne by the rear pillar, which is a vertical frame member at the rear of the vehicle body. Can be further increased in rigidity.

According to the third aspect, in addition to the effects of the first and second aspects, the inclined wall of the upper wall of the rear parcel member is joined to the shock absorber mounting bracket surface at a portion corresponding to the joint portion of the rear strut tower. Since the suspension input in the vertical direction is received by the inclined wall in the vertical direction, the rigidity of the rear strut tower in the vertical direction can be further increased.

Further, since a working hole is formed in an inclined wall having surface rigidity with respect to the vertical suspension input, and a reinforce is joined to the periphery of the working hole, a working hole is formed in the upper wall of the rear parcel member. A reduction in rigidity can be avoided, and the function of the rear parcel member as the original strength skeleton member is not impaired.

According to the fourth aspect, in addition to the effects of the first to third aspects, 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 strut rigidity of the rear strut tower can be received. And the torsional rigidity at the rear of the vehicle body can be further increased.

[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 denotes a rear wheel which is joined to a rear side member 2 which is a longitudinal frame member of the vehicle body floor and a rear pillar inner 3 of a rear pillar which is a vertical frame member at the rear of the vehicle body. This shows a rear wheel house inner to which a house outer is joined, and a rear strut tower 4 is integrally formed on an upper surface portion thereof so as to protrude.

The upper end of the rear strut tower 4
The shock absorber mounting bracket 5 which is formed separately and has a relatively large thickness is internally fitted and welded to the periphery, and in this embodiment, the rear strut tower 4 is provided.
Is joined to the rear pillar inner 3 in the same manner as the rear wheel house inner 1 including the mounting bracket 5.

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

The side of the shock absorber mounting bracket 5 opposite to the side on which the shock absorber connecting portion 5a is formed has a member mounting surface 5b formed one step lower than the inclined surface 5c. At the center 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 increase the surface rigidity.

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

The rear parcel member 7 is formed in a closed cross-sectional structure and functions as a frame member in the vehicle width direction at the rear waist portion of the vehicle body. The upper wall 9 is bent rearward at the upper end of a rear seat back panel 8 for supporting a rear seat back (not shown), and a substantially L-shaped member 10 is formed on the rear surface of the upper end of the rear seat back panel 8.
And the lower wall 11 and the rear wall 12 of the rear parcel member 7
And form.

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

Then, 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 surrounds the shock absorber connecting portion 5a of the shock absorber mounting bracket 5. Reinforce 13 straddling the lower wall 11 and the upper wall 12 of the parcel member 7 is joined and arranged,
A closed section 14 surrounding the shock absorber connecting portion 5a is formed.

In this embodiment, a notch 11a is formed on the side of the lower wall 11 of the rear parcel member 7 so that the shock absorber connecting portion 5 of the shock absorber mounting bracket 5 is formed.
a, and is overlapped and joined from the inclined surface 5c to the rear half of the member mounting surface 5b.

On the other hand, the upper wall 9 of the rear parcel member 7 forms a slanted wall 15 which is slanted downward toward the side at a portion corresponding to the connection of the rear strut tower 4 at the side thereof. The portion 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 above the shock absorber connecting portion 5a, and the shock absorber connecting portion 5a is formed through the working hole 16 from above.
, A shock absorber (not shown) can be easily connected.

The reinforcement 13 is provided on the inclined wall 1.
5 is formed into a substantially U-shaped plane by the side wall 13a and the front and rear walls 13b having an inclination angle larger than 5, and the working hole 1 of the inclined wall 15 is previously formed.
The lower edge of the reinforce 13 is fastened to the periphery of the shock absorber connecting portion 5a with a fastening member such as a bolt and nut (not shown).

As described above, in the present embodiment, since the side of the upper wall 9 of the rear parcel member 7 is formed as an inclined wall 15 from the middle, the upper edge of the side of the rear wall 12 is formed by the side of the rear parcel panel 6. 6b, and the rear edge of the inclined wall 15 is connected 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 joined to the lower wall 11 of the rear parcel member 7, and a closed cross-section 14 is formed by a reinforce 13 extending over the lower wall 11 and the upper wall 9 so as to surround the shock absorber connecting portion 5a. Therefore, the strength and rigidity around the shock absorber connecting portion 5a are high, so that 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 transmission efficiency of the suspension input to the rear parcel member 7 is increased without causing local deformation due to stress concentration on the upper wall 9, and the rigidity in the vehicle width direction (inward falling rigidity) and the vertical rigidity of the rear strut tower 4 are increased. In addition, the rigidity in the front-rear direction can be increased.

In particular, in this embodiment, since the side edge of the rear strut tower 4 is joined to the rear pillar inner 3 of the rear pillar which is a vertical frame member at the rear of the vehicle body, it acts on the rear strut tower 4. The suspension input can be directly applied to the rear pillar,
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.
Is connected to the front side surface of the rear strut tower 4, so that the vertical suspension input acting on the rear strut tower 4 can be received by the shear surface of the rear seat back panel 8, and the rear strut tower 4, and the torsional rigidity of the rear portion of the vehicle body can be further increased.

Further, since the inclined wall 15 of the upper wall 9 of the rear parcel member 7 is joined to the shock absorber mounting bracket 5 at a portion corresponding to the connecting portion of the strut tower 4, the suspension input in the vertical direction can be applied to the inclined wall 15. Therefore, the input can be satisfactorily transmitted to the general portion side of the upper wall 9 by receiving in the vertical direction, that is, receiving on the shear surface of the inclined wall 15, so that the vertical rigidity of the rear strut tower 4 can be further increased.

A working hole 16 is formed in the inclined wall 15 having surface rigidity with respect to a vertical suspension input.
Since the reinforce 13 is joined to the periphery of the working hole 16, the working hole 1 in the upper wall 9 of the rear parcel member 7 is formed.
6 can be avoided, and the function of the rear parcel member as the original strength skeletal member is not slightly impaired.

[Brief description of the drawings]

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

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rear wheel house inner 3 Rear pillar inner 4 Rear strut tower 5 Shock absorber mounting bracket 5a Shock absorber connecting part 7 Rear parcel member 8 Rear seat back panel 9 Upper wall of rear parcel member 11 Lower wall of rear parcel member 13 Reinforce 14 Closed cross section Part 15 Inclined wall 16 Working hole

Continuation of the front page (56) References JP-A-6-206577 (JP, A) JP-A-5-213234 (JP, A) JP-A-6-55953 (JP, U) JP-A-62-28885 (JP) , U) Japanese Utility Model Application Hei 5-89164 (JP, U) Japanese Utility Model Application Hei 3-57185 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B62D 25/08

Claims (4)

(57) [Claims] 1. A shock absorber mounting bracket at an upper end of a rear strut tower formed on a rear wheel house inner is connected to a lower wall of a rear parcel member having a closed cross-sectional structure extending in a vehicle width direction, and the shock absorber mounting bracket is mounted. A closed cross-section surrounding the shock absorber connection part by joining and arranging a reinforce that straddles the lower and upper walls of the rear parcel member surrounding the shock absorber connection part. Rear body structure. 2. The vehicle body rear structure according to claim 1, wherein a side edge of the rear strut tower is directly connected to a rear pillar inner as a whole, including a side edge of a shock absorber mounting bracket. 3. An inclined wall which is inclined obliquely downward toward the side at a portion corresponding to a rear strut tower and is joined to a shock absorber mounting bracket surface on a side portion of an upper wall of the rear parcel member, the inclined wall being provided. The rear structure of a vehicle body according to claim 1, wherein a work hole is formed in an upper portion of the shock absorber connecting portion, and a reinforce is joined to a peripheral edge of the work hole. 4. An upper wall of a rear parcel member is formed integrally with an upper end 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. A vehicle body rear structure according to any one of the above.