JPH0624311Y2 - Automotive damper mounting structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a structure of a damper mounting portion for a vehicle body of an automobile.

2. Description of the Related Art In recent years, as a car body of an automobile, a frameless structure by welding and assembling steel sheet panels has been widely adopted. In such a vehicle body structure, since the upper end of the damper that absorbs the reaction force from the wheels and transmits it to the vehicle body is attached to the panel portion of the vehicle body structure, it is necessary to reinforce this attachment portion. Therefore, conventionally, for example, as disclosed in Japanese Utility Model Laid-Open No. Sho 60-9712, a plate member is superposed on a damper mounting position of a panel portion, and this is fixed by bolts or spot welding to reinforce the mounting portion. Things were being done.

However, in such a reinforcing structure, a high stress concentration occurs in the fixing portion due to the force applied to the mounting portion via the damper, and in order to cope with this, the thickness of the panel portion and the plate member is increased. Must be thickened.

Therefore, the present invention is intended to obtain a damper mounting portion structure which can give sufficient strength and rigidity to the damper and the mounting portion by using a relatively thin plate material.

Further, the present invention seeks to obtain the above-described damper mounting structure provided in the wheel house part of the vehicle body so as to be suitable for a vehicle adopting a double wishbone type suspension system in which the mounting position of the damper to the vehicle body is low. It is a thing.

For this reason, in the present invention, in the present invention, in the structure of the damper mounting portion provided in the wheel house portion of the vehicle body that is continuously configured by the panel, the damper is attached to the side wall portion of the wheel house portion. And a damper gusset extending to the rigid portion of the vehicle body and fixed to the rigid portion is attached to the outside of the side wall portion of the vehicle body, and the damper gusset is closely attached to the horizontal portion. At the same time, at least a part of the periphery of the horizontal part forms a box-shaped closed cross-section part by the wheel house part and the damper gusset.

According to the present invention, the box-shaped portion having the closed cross section effectively opposes the force acting on the damper mounting portion to prevent the deformation of the mounting portion, and this force is applied to the rigid portion of the vehicle body through the damper gusset. Since it can be received by, it is possible to form the damper mounting portion in the wheel house portion made of a relatively thin plate material, and since the wheel house portion itself is utilized as a member forming the above box-shaped portion, it is lightweight as a whole and A damper mounting part with high strength and high rigidity can be obtained.

Further, since the damper gusset is closely attached to the horizontal portion of the wheel house portion formed for attaching the upper end of the damper, the horizontal portion is reinforced by this damper gusset,
Moreover, it forms a simple flat plate with the damper gusset. Therefore, a special mount portion is not required at the upper end of the damper, and the damper having the same structure as the conventional one can be used, so that the number of parts and the cost can be reduced.

The damper mounting structure of the present invention can also be easily formed by forming the horizontal portion by a damper base that closes an opening provided in the wheel house portion.

Embodiment FIG. 1 is a perspective view showing an example of an automobile body (body) to which the present invention is applied. This vehicle body has a rear side outer panel 1, a side sill 2, a center pillar 3, a roof panel 4, a front side member 5, and the like. It has an integral structure, and a wheel house 6 is provided at a position corresponding to the rear wheels on both sides of the rear part.

FIG. 2 is an enlarged perspective view of the wheel house 6. A flange 7 is provided along the outer peripheral edge of the wheel house 6, and the wheel house 6 is fixed to the rear side inner panel 8 (FIG. 4) via the flange 7.
As can be seen from FIG. 4, the lower portion of the rear side inner panel 8 projects outward so as to form an extension of the wheel house 6, and cooperates with the wheel house 6 to cover the upper portion of the rear wheel 9, The lower edge of the rear side outer panel 1 is fixed to the outer end of the inner panel 8. Between the rear side outer panel 1 and the rear side inner panel 8, a damper stiffener 10 is arranged as a rigid portion of the vehicle body.

On the inner side wall of the wheel house 6 shown in FIG. 2, there is formed a shelf-like damper mounting portion 11 which is open toward the front and the side at an intermediate position in the vertical direction. That is, the cross-sectional shape of the damper mounting portion 11 in the front-rear direction is as shown in FIG.
The wheel house 6 includes an inner vertical portion 13 bent downward from the upper plate 12, a horizontal portion 14, and an outer vertical portion 15 bent downward from the horizontal portion 14. In this embodiment, a step 16 is further provided in the middle of the inner vertical portion 13.
An inner vertical portion 13 which is similar to the above in the lateral direction across the horizontal portion 14 is also provided.
a, the outer vertical portion 15a is formed. A circular hole 17 is formed in the center of the horizontal portion 14, and the upper end of the damper D (FIG. 4) is inserted into the hole 17 from below and fixed to the horizontal portion 14.

The damper attachment portion 11 is reinforced and the damper attachment portion is
In order to transmit the force applied to the damper 11 to the damper stiffener 10 which is a rigid portion of the vehicle body, a damper gusset 18 is provided along the back surface of the damper mounting portion 11. The damper gusset 18 has substantially the same shape as the damper mounting portion 11, and includes an extending portion 18a extending from the damper mounting portion 11 along the upper plate 12 of the wheel house 6 toward the flange 7 side. The tip of the portion 18a is welded to the damper stiffener 10 together with the rear side inner panel 8 as shown in FIG.

The structure of the damper mounting portion 11 of the damper gusset 18 will be described with reference to FIG. The damper gusset 18 is an inner vertical portion along the inner vertical portion 13 formed in the wheel house 6.
13b, a horizontal portion 14b along the horizontal portion 14, and an outer vertical portion 15b along the outer vertical portion 15, the inner vertical portion 13b to the inner vertical portion 13, the outer vertical portion 15b to the outer vertical portion 15. Are fixed to each other by spot welding or the like. And the connecting portion between the horizontal portion 14b and the outer vertical portion 15b is a shoulder portion that is recessed inward.
It is 19. The outer side of the shoulder portion 19 is covered with a connecting portion of the horizontal portion 14 and the outer vertical portion 15 of the wheel house 6, and the wheel house 6 and the damper gusset 18 form a box-shaped closed cross-section portion 20 there. ing. Inner vertical part 1
Also on the side of 3, 13b, a similar closed cross section 2 is formed by the step 16
1 is formed.

The damper mounting portion 11 is further reinforced by a damper base 22. This damper base 22 is the same as the damper gusset 18 described above.
It has a shape that matches the damper mounting portion 11 part of, is attached to the back surface of the damper gusset 18, and to the damper gusset 18,
Further, it is fixed to the wheel house 6 via a damper gusset 18 by spot welding or the like. The damper base 22 and the damper gusset 18 are provided at the horizontal portions with holes that are aligned with the holes 17 provided at the horizontal portion 14 of the wheel house 6. The cross-sectional shape of the damper mounting portion 11 is also substantially the same as the vertical sectional shape of FIG.

FIG. 4 is a cross-sectional view showing another embodiment of the present invention. In the embodiment of FIGS. 2 and 3, the inner vertical portion
The damper mounting portion 11 having a complicated shape including 13,13a, the horizontal portion 14 and the outer vertical portions 15 and 15a must be integrally formed with the wheel house 6, but according to the present embodiment, the wheel house 6 is formed. Becomes extremely easy. That is, in this embodiment, the wheel house 6 initially has the damper mounting portion 11
The portion corresponding to is formed as a slope having a simple shape as shown by the broken line in FIG. 5, and after this portion is cut out along the cutting line t, the portion is opened 23 (FIG. 4). And

Then, the opening 23 is closed by the damper base 22. The damper base 22 has an inner vertical portion 13c, a horizontal portion 14c, and an outer vertical portion 15c. The inner vertical portion 13c is the inner vertical portion 13 of the wheel house 6, and the outer vertical portion 15c is the outer vertical portion 15 of the wheel house 6. By sticking, wheel house 6
The damper base 22 and the damper base 22 form a damper mount 11 that is exactly the same as the damper mount 11 shown in FIG. Damper base
The horizontal portion 14c of 22 is provided with an opening, that is, a hole 17 having a smaller diameter than the opening 23, and the upper end of the damper is inserted into the hole 17 from below as in the case of the above embodiment.

A damper gusset 18 is attached to the back surface of the damper mounting portion 11 thus formed, and is fixed to the wheel house 6 together with the damper base 22 by spot welding or the like. The damper gusset 18 has exactly the same shape as that of the above-mentioned embodiment, and the shoulder portion 19 formed on the upper portion of the outer vertical portion 15b.
With the corner portions of the horizontal portion 14c and the outer vertical portion 15c of the damper base 22 and the upper portion of the outer vertical portion 15 of the wheel house 6, a box-shaped closed cross-section portion 20 similar to the above is formed.

FIG. 6 is a partial cross-sectional view showing a modified example of FIG. 4, in which the outer vertical portion 15c of the damper base 22 is attached to the inner side of the outer vertical portion 15 of the wheel house 6 in FIG. In this modification, the outer vertical portion 15c is provided outside the outer vertical portion 15.

In each of the above embodiments, the damper base 22 is the damper mounting portion.
The damper gusset 18 serves to reinforce the damper mounting portion 11 and to transmit the force transmitted from the damper to the damper mounting portion 11 to the damper paste stiffener 10 so that the damper paste stiffener 10 receives the force. Is the damper mounting portion 11 by these members and the wheel house 6 itself.
Box-shaped closed cross-section part 2 formed at least partly around
Further reinforced by 0,21. That is, the closed cross section 20,2
1 gives great rigidity to the damper mounting portion 11 and effectively prevents the deformation of the damper mounting portion 11 due to the force from the damper. Therefore, it is not necessary to particularly increase the wall thickness of the wheel house 6, the damper gusset 18 and the damper base 22, and since no reinforcing member other than these members is required, a lightweight, high-strength and high-rigidity damper mounting portion can be provided. can get.

Since the damper mounting portion 11 is formed integrally with the wheel house 6, it is particularly suitable for a vehicle that adopts a double wishbone suspension type in which the mounting position of the damper with respect to the vehicle body is low.

Although the embodiment in which the present invention is applied to the rear damper mounting portion has been described, the present invention can of course be applied to the front damper mounting portion.

As described above, according to the present invention, in the structure of the damper mounting portion provided in the wheel house portion of the vehicle body which is continuously constructed by the panel, the horizontal side for mounting the upper end of the damper is attached to the side wall portion of the wheel house portion. And a damper gusset extending to the rigid portion of the vehicle body and fixed to the rigid portion is formed on the outside of the side wall portion of the vehicle body, and the damper gusset is closely attached to the horizontal portion and Since a box-shaped closed cross-section portion is formed by at least a part of the periphery of the portion by the wheel house portion and the damper gusset, a damper attachment portion having a sufficient strength and rigidity can be made lightweight by using a relatively thin material. In addition, the part to which the damper is attached has a simple flat plate shape, so the mounting structure of the upper end of the damper is simple, reducing the number of parts and cost. A damper mounting portion that can be achieved is obtained.

[Brief description of drawings]

1 is a perspective view showing an example of an automobile body to which the present invention is applied, FIG. 2 is a partially enlarged perspective view of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. FIG. 4 is a cross-sectional view of a damper mounting portion according to another embodiment of the present invention, and FIG. 5 is a cross-sectional view showing a state of a wheel house in the same embodiment at the time of molding,
FIG. 6 is a partial cross-sectional view showing a modified example of FIG. 1 ... Rear side outer panel, 2 ... Side sill, 3
...... Center pillar, 4 ... Roof panel, 5 ... Front side member, 6 ... Wheel house, 7 ... Flange, 8 ... Rear side inner panel, 9 ... Rear wheel 910 ...
… Dampa Stiffener, 11 …… Damper mounting part, 12 …… Inner vertical part, 14 …… Horizontal part, 15 …… Outer vertical part, 16 …… Step part, 17 …… Hole, 18 …… Damper gusset, 19… … Shoulder, 20
...... Closed cross section, 21 ...... Closed cross section, 22 ...... Damper base,
23 …… Opening.

Claims (2)

[Scope of utility model registration request] 1. A structure of a damper mounting portion provided in a wheel house portion of a vehicle body, which is continuously constructed by panels, wherein a horizontal portion for mounting an upper end of the damper is formed on a side wall portion of the wheel house portion, and A damper gusset extending to a rigid portion of the vehicle body and fixed to the rigid portion is additionally provided on the outer side of the side wall portion of the vehicle body, and the damper gusset is closely attached to the horizontal portion, and at least a part of the periphery of the horizontal portion. A damper mounting portion structure for an automobile, characterized in that a box-shaped closed cross-section portion is formed by the wheel house portion and the damper gusset. 2. The damper mounting portion structure according to claim 1, wherein the horizontal portion is formed by a damper base that closes an opening provided in the wheel house portion.