JP3498604B2 - Rear suspension mounting structure of automobile - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a rear suspension mounting portion of an automobile or the like, and more particularly to a structure around a strut housing of a rear wheel house inner.

[0002]

As a conventional mounting structure for a rear suspension of an automobile, a rear wheel house inner press-molded with a metal panel material extends from a lower edge of a substantially central portion of a peripheral side wall to an upper edge portion. A shock absorber bracket having a flat shock absorber mounting seat portion and a vertical wall portion that overlaps the vehicle outer side of the peripheral side wall of the rear wheel house inner is joined to project the strut housing to the vehicle outer side of the rear wheel house inner. It is known that it is provided.

In these conventional structures, the lower end of the shock absorber bracket is joined to the end of the rear floor panel together with the lower edge of the peripheral side wall of the rear wheel house inner and the side flange of the rear side member.

However, this has a problem that the amount of lap between the shock absorber bracket and the rear side member is small and the input from the suspension cannot be sufficiently transmitted to the rear side member which is a vehicle frame member.

Therefore, as shown in FIG. 6, the lower portion of the shock absorber bracket 3 is extended downward, and a weld nut 8 is provided on the side surface 2a of the rear side member 2 which is the vehicle front-back direction frame member. The lower portion of the shock absorber bracket 3 is fastened and fixed to the side surface 2a of the rear side member 2 with bolts 7 so that a load input from a suspension (not shown) can be reliably transmitted to and supported by the rear side member 2. There is something I did.

However, according to this structure, there have been problems such that the weld nut is previously provided on the rear side member, the fastening work at the time of assembling, the number of working steps is increased, and the cost is disadvantageous.

On the other hand, as shown in FIG. 7, instead of the weld nut 8 provided on the side surface 2a of the rear side member 2 in the structure of FIG. 6, a bracket 9 is provided on the lower surface of the rear side member 2, and a shock is applied to the bracket 9. There is also a structure in which the lower portion of the absorber bracket 3 is joined by spot welding SP so that the load input from the suspension (not shown) to the shock absorber bracket 3 is transmitted to the rear side member 2 to enhance the support rigidity.

In this structure, the lower portion of the shock absorber bracket is joined to the rear side member by spot welding which is inexpensive and has high workability. However, since the shock absorber bracket is extended further downward, the material yield is increased. Worsens, and it becomes a cost disadvantage.

Therefore, the present invention provides a structure of a rear suspension of an automobile capable of significantly increasing the support rigidity of the suspension while suppressing the cost.

[0010]

According to a first aspect of the present invention, there is provided a flat shock absorber mounting seat portion extending from a lower edge of a substantially central portion on the vehicle outer side of a peripheral side wall of a rear wheel house inner to an upper edge portion. In a structure in which a shock absorber bracket having a vertical wall portion that overlaps the vehicle outer side of the peripheral side wall of the rear wheel house inner is joined, and a strut housing is provided so as to project to the vehicle outer side of the rear wheel house inner, a cross-section substantially hat A mold reinforce is joined to the side surface of the rear side member at a position facing the vertical wall portion of the shock absorber bracket in the vehicle width direction, and the lower portion of the vertical wall portion of the shock absorber bracket is formed into a substantially hat-shaped cross section. , Fit and join with the reinforcement, and attach the shock absorber bracket through the reinforcement. It is characterized in that it has joined to the serial rear side member.

According to a second aspect of the present invention, a bead portion is provided upward from a lower portion of the vertical wall portion of the shock absorber bracket according to the first aspect, and the bead portion has a hat-shaped cross section below the vertical wall portion. It is characterized in that it is provided continuously on the front and rear walls.

A third aspect of the present invention is characterized in that the end portion of the lower flange of the vertical wall formed in the hat-shaped cross section of the shock absorber bracket according to the first and second aspects is curled.

[0013]

According to the first aspect of the present invention, a reinforcement having a substantially hat-shaped cross section is provided by being joined to the side surface of the rear side member at a position facing the vertical wall portion of the shock absorber bracket in the vehicle width direction, and the shock absorber bracket is also provided. The lower part of the vertical wall of the
Since the shock absorber bracket is fitted and joined to the reinforcement and the shock absorber bracket is joined to the rear side member via the reinforcement, the shock absorber bracket can be manufactured inexpensively and easily without deteriorating the material yield. Can be joined to the rear side member and the input load from the suspension can be supported by the rear side member, which is a vehicle frame member, so that the support rigidity of the suspension can be increased.

According to the second aspect, in addition to the effect of the first aspect, since the bead portion is provided upward from the lower portion of the vertical wall portion of the shock absorber bracket, the input from the suspension is provided by the bead portion. Not only can the support rigidity be increased against the load, but the bead portion is continuously provided on the front and rear walls of the hat-shaped cross section of the lower portion of the vertical wall portion, so that the input load from the suspension is applied to the front, The rear side member can be surely transmitted to the rear side member via the rear wall, and the suspension supporting rigidity can be further enhanced.

According to the third aspect, in addition to the effects of the first and second aspects, since the end of the flange at the lower portion of the vertical wall formed in the hat-shaped cross section of the shock absorber bracket is curling-molded, the shock absorber is formed. In addition to being able to hide the edge of the reinforcement end by the flange of the bracket, the tire can be protected from the edge portion of the flange end.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below in detail with reference to the drawings by attaching the same reference numerals to the same portions as those of the conventional structure.

1 to 5, reference numeral 1 denotes a rear wheel house inner press-molded from a metal panel material, and a notch 11 is formed at a substantially central portion of a peripheral side wall 1a thereof.

A shock absorber bracket 3 is joined to the vehicle outer side of the substantially central portion of the peripheral side wall 1a from the lower edge to the upper edge thereof to project the strut housing 4 to the vehicle outer side of the rear wheel house inner 1. Is provided.

The shock absorber bracket 3
Is an upper bracket 3A having a flat shock absorber mounting seat 3a, and a rear wheel house inner 1
The lower bracket 3B provided with the vertical wall portion 3b which is overlapped and joined to the vehicle outer side of the peripheral side wall 1a from the cutout portion 11 to the lower edge is sub-assembled and formed.

The lower portion of the vertical wall portion 3b of the shock absorber bracket 3 is formed in a hat shape in cross section.

Reference numeral 5 is a reinforcement having a substantially hat-shaped cross section, and the reinforcement 5 is joined to the side surface of the rear side member 2 at a position facing the vertical wall portion 3b of the shock absorber bracket 3 in the vehicle width direction. .

The above-mentioned shock absorber bracket 3
Is fitted to the reinforcement 5 of the hat-shaped cross section at the lower portion of the vertical wall portion 3b having the substantially hat-shaped cross section, and as shown in FIG. 5, by inexpensive spot welding SP on the front and rear walls 3c and 3d. The side surface 2 of the rear side member 2 is joined to the reinforcement 5 via the reinforcement 5.
It is joined to a.

Reference numeral 6 denotes a rear floor panel having a rear side member 2 joined to a lower surface thereof, and a lower edge of the rear wheel house 1, a side flange of the rear side member 2 and a shock absorber bracket 3 are joined to both sides thereof. .

Particularly in this embodiment, the bead portion 10 is provided from the lower portion of the vertical wall portion 3b of the shock absorber bracket 3 toward the upper side.

Moreover, the bead portion 10 is connected to the vertical wall portion 3b.
It is provided so as to be continuous with the front and rear walls 3c and 3d of the lower hat section.

Further, the shock absorber bracket 3
The end portion of the flange 3e having the hat-shaped cross section is curled.

According to the structure of the above embodiment, the reinforcement 5 having a substantially hat-shaped cross section is provided by being joined to the side surface of the rear side member 2 at a position facing the vertical wall portion 3b of the shock absorber bracket 3 in the vehicle width direction. At the same time, the lower portion of the vertical wall portion 3b of the shock absorber bracket 3 is formed in a substantially hat shape in cross section, and fitted and joined to the reinforcement 5, and the shock absorber bracket 3 is inserted through the reinforcement 5. Since the rear side member 2 is joined to the rear side member 2, the shock absorber bracket is joined to the rear side member inexpensively and easily without deteriorating the material yield, and the input load from the suspension is applied to the rear side member which is a vehicle frame member. Since it can be supported, it is possible to increase the support rigidity of the suspension. That.

In particular, according to this embodiment, the bead portion 10 is provided upward from the lower portion of the vertical wall portion 3b of the shock absorber bracket 3, so that the bead portion opposes the input load from the suspension. The bead portion 10 is continuously provided to the front and rear walls 3c and 3d of the hat-shaped cross section under the vertical wall portion 3b, so that the input load from the suspension can be increased. The rear side member can be surely transmitted via the front and rear walls, and the suspension supporting rigidity can be further enhanced.

Moreover, the flange 3 at the bottom of the vertical wall 3b formed in the hat-shaped cross section of the shock absorber bracket 3.
Since the end of e is curled, the edge of the end of the reinforcement 5 can be hidden by the flange 3e of this shock absorber bracket.
The tire can be protected from the edge portion of the end portion of the flange 3e.

[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 the same embodiment.

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

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

5 is a cross-sectional view taken along the line CC of FIG.

FIG. 6 is a cross-sectional view showing a conventional structure.

FIG. 7 is a cross-sectional view showing another conventional structure.

[Explanation of symbols]

1 Rear Wheel House Inner 1a Peripheral side wall 2 rear side members 2a side 3 shock absorber bracket 3a Shock absorber mounting seat 3b Vertical wall 3c, 3d front and rear walls 3e flange 4 strut housing 5 Reinforce 10 Bead section

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Claims (3)

(57) [Claims] 1. A flat shock absorber mounting seat portion and a vehicle outer side of a peripheral side wall of the rear wheel house inner, extending from a lower edge to an upper edge of a substantially central portion of the peripheral side wall of the rear wheel house inner. In a structure in which a shock absorber bracket having an overlapping vertical wall portion is joined, and a strut housing is provided so as to project to the vehicle outer side of the rear wheel house inner, a reinforcement having a substantially hat cross section is provided on the side surface of the rear side member. The lower wall of the vertical wall portion of the shock absorber bracket is formed in a substantially hat-shaped cross-section, and the lower wall portion of the shock absorber bracket is joined to the reinforcement vertical wall portion in a vehicle width direction. The shock absorber bracket is joined to the rear side member via the reinforcement. Rear suspension mounting portion structure of an automobile according to claim. 2. A bead portion is provided upward from a lower portion of a vertical wall portion of the shock absorber bracket, and the bead portion is provided in front of a hat-shaped cross section of the lower portion of the vertical wall portion,
The rear suspension mounting portion structure for an automobile according to claim 1, wherein the rear suspension mounting portion structure is provided continuously to the rear wall. 3. The rear suspension mounting portion of the automobile according to claim 1, wherein an end portion of a flange at a lower portion of the vertical wall formed in the hat-shaped cross section of the shock absorber bracket is curling-molded. Construction.