JP3265447B2 - Structure of suspension bracket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension bracket for supporting one end of a control arm of a suspension device for a vehicle such as an automobile.

[0002]

2. Description of the Related Art Conventionally, as a specific example of a structure of a suspension bracket, there is one disclosed in Japanese Utility Model Laid-Open No. 5-26519 or Japanese Utility Model Laid-Open No. 2-108661.

That is, in the former, as shown in FIG. 1 of the publication, two brackets are individually attached to the lower surface of a side member as a chassis frame. The upper control arm and the lower control arm of a so-called five-link suspension device (a structure in which a lateral rod is added to a so-called four-link suspension device) are connected to the two brackets. .

On the other hand, in the latter case, as shown in FIG. 2 of the publication, a first bracket is provided at a lower portion of the side member, while the first bracket is connected to the side member.
This is a structure in which the second bracket is attached between both of the cross members of the book. The lower control arm of the five-link type suspension device is connected to the first bracket, while the upper control arm is connected to both the first bracket and the second bracket.

[0005]

In the above-mentioned conventional structure, since two brackets are separately mounted on the side members, the number of parts of the bracket is large, and the number of work steps required for mounting these brackets is large. Also increase. Therefore, there has been a problem that the entire assembling work is complicated and the manufacturing cost is high.

Further, in the above-mentioned conventional structure, the two brackets are merely welded to the lower surface of the side member independently, and the two brackets are effectively used by other members attached to the vehicle. It is not a reinforced structure. Therefore, in order to increase the rigidity of the two brackets in the vehicle front-rear direction and the vehicle width direction and increase the suspension strength, it is necessary to increase the thickness and size of each bracket, and it is difficult to reduce the size and weight of each part. Had become something.

On the other hand, in the above-mentioned conventional structure, the second bracket is attached so as to extend between the two cross members, so that the strength of the bracket can be efficiently increased as compared with the former structure. It is. However, in the latter structure, as in the former case, since the means uses two brackets, the total number of components is also large, and the entire assembling work is complicated,
There was a disadvantage that the manufacturing cost was high.

In the above-mentioned conventional structure, a part of the vehicle fixing member is effectively used by attaching the second bracket to two cross members. There is still room for improvement in securing the rigidity of the entire bracket. That is, in the latter conventional structure, the first bracket is attached to the side member to which the cross member, the outrigger, and the like are connected, but the first bracket is used effectively by the cross member, the outrigger, and the like. There is no form of reinforcement. Also, for the second bracket,
It is merely attached to the two cross members so as to extend in the front-rear direction of the vehicle, and the rigidity of the vehicle width is not effectively increased.

Further, in this type of bracket structure,
It is necessary to increase the strength of the part to which each end of the upper control arm and the lower control arm of the suspension device are connected. However, in the latter conventional structure, a device for efficiently increasing the strength of these parts is required. Nor has it been given. Therefore, even in the latter conventional structure, there is a problem that the first bracket and the second bracket themselves must be made thick and large as in the former case.

The present invention has been made under such circumstances, and the strength of a bracket for supporting a control arm of a suspension device is increased by a simple means having a small number of parts. Accordingly, it is an object of the present invention to reduce the size and weight of the suspension bracket and to reduce the manufacturing cost.

[0011]

DISCLOSURE OF THE INVENTION In order to solve the above problems, the present invention employs the following technical means.

The present invention has a side member extending in the front-rear direction of a vehicle, and a bracket attached to the side member so as to protrude below the side member. A suspension bracket structure provided with two sets of connection holes for connecting one end of each of an arm and a lower control arm, wherein the bracket is connected to both the inside and outside of the side member in the vehicle width direction. One end of each of the cross member and the outrigger is formed so as to protrude downward from the side member, and both side surfaces of a portion of the bracket that protrudes downward from the side member are arranged in the vehicle longitudinal direction. To both sides while sandwiching them from both sides with their positions shifted from each other And the two sets of connection holes are arranged one by one in a region below or substantially below a portion of the bracket where one end of each of the cross member and the outrigger is joined. It is characterized by:

In the present invention, the upper control arm and the lower control arm of the suspension device can be respectively connected to two sets of connection holes provided in one bracket, and the number of brackets is one. Good. Therefore, unlike the conventional means in which two brackets are separately provided, the number of parts can be reduced, the mounting work can be facilitated, and the manufacturing cost can be reduced. can get.

Further, as an important effect, in the present invention, both side portions of the bracket projecting downward from the side members are joined to the cross members and the outriggers so as to be sandwiched by the respective ends of the cross members and the outriggers. Therefore, both side portions of the bracket are reinforced by these cross members and outriggers, and the rigidity of the bracket in the vehicle width direction can be increased. That is, since the bracket is provided so as to protrude below the side member, the strength of the portion of the bracket that protrudes below the side member among the parts of the bracket is weakened. Then
By arranging and joining a highly rigid cross member or outrigger on both sides of this portion, the strength of the bracket can be efficiently increased.

According to the invention of the present application, two sets of connecting holes for connecting the upper control arm and the lower control arm of the suspension are respectively connected to one end of the cross member and one end of the outrigger of each part of the bracket. In the area below or almost below the
Although it is arranged in pairs, the region below or substantially below the point where each end of the cross member and the outrigger are joined to each other, the rigidity of the bracket is efficiently increased by both the cross member and the outrigger. It is an enhanced area. Therefore, it is possible to properly connect the upper control arm and the lower control arm of the suspension device to the portion having increased rigidity,
The bracket strength can be further improved.

This improvement in bracket strength is achieved as a result of the effective use of cross members and outriggers connected to the side members, and the use of a dedicated reinforcing material intended only for reinforcing the bracket is required. Not achieved by That is, the cross member is
The outrigger is a member for securing strength in the vehicle width direction of the vehicle, and the outrigger is a member for attaching an outer member such as an exterior panel of the vehicle, and a vehicle such as an automobile is provided with any member. Is customary. Therefore,
According to the present invention, a special effect is obtained in that the thickness and the size and weight of the bracket can be reduced without causing problems such as an increase in the total number of parts and a complicated configuration.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a perspective view of an essential part showing an example of the structure of a suspension bracket to which the present invention is applied. FIG. 2 is a plan view of a main part of FIG. FIG. 3 is a sectional view taken along line X1-X1 of FIG. FIG. 4 is a cross-sectional view of FIG.
It is a line sectional view. In each of these figures, the arrow Fr
Indicates the front of the vehicle, and arrow Ou indicates the outside of the vehicle.

In FIG. 1, in the structure of the suspension bracket, a bracket 2 is mounted on a side member 1 of a vehicle, and a cross member 3 and an outrigger 4 are joined to both side surfaces 2a and 2b of the bracket 2. Have been.

The side member 1 is disposed on the side of the vehicle and is provided so as to extend in the front-rear direction of the vehicle. The side member 1 is made of, for example, a steel material having a groove-shaped cross section with an open upper surface.

The bracket 2 is formed by pressing a metal plate. As shown in FIGS. 3 and 4, the bracket 2 includes a pair of left and right side plate portions 20a and 20b facing each other at a predetermined interval, and a front portion of each of the pair of side plate portions 20a and 20b. A front plate portion 20c to be connected, and the side plate portions 20a and 20b are provided.
21a, rear 21b, and lower 21c between
Is open. Further, flanges of an appropriate shape are appropriately formed on the edge portions of the side plate portions 20a and 20b.

The bracket 2 comprises a pair of side plate portions 2
0a and 20b are on both sides 1 of the side member 1.
a, 1b, and are welded to the surfaces of the side surfaces 1a, 1b and the lower portion 1c of the side member 1. Thus, the bracket 2 is fixedly attached to the side member 1 such that a lower portion thereof protrudes below the side member 1.

Also, the side plate portions 20a of the bracket 2,
20b, two sets of connecting holes 22A and 22B are provided at predetermined positions to be described later so as to penetrate therethrough (the center lines C1 and C2 in FIGS. 2 and 4 correspond to the two sets of connecting holes 22A). , 22B). As shown in FIG. 1, these connection holes 22A and 22B are provided in the upper control arm 5A of the five-link type suspension device.
And one end of the lower control arm 5B so as to be rotatable up and down.

The five-link type suspension device is a suspension device having a four-link mechanism as viewed from the side of the vehicle, in which a lateral rod is added to the suspension device. The upper control arm 5A and the lower control arm 5
The other end with B is connected to the rear wheel axle via a suitable bracket. These upper control arms 5
A and the lower control arm 5B are not necessarily arranged to extend exactly in the vehicle front-rear direction. For example, the upper control arm 5A may be provided obliquely with respect to the vehicle front-rear direction. Therefore, in such a case, the pair of side plate portions 20 of the bracket 2 are arranged along the direction of the upper control arm 5A.
Reference numerals a and 20b extend obliquely in plan view.

The cross member 3 is disposed inside the side member 1 in the vehicle width direction and extends in the vehicle width direction. For example, like the side member 1, the cross member 3 is made of a steel material having a groove-shaped cross section with an open upper portion. It is configured. One end 3a of the cross member 3 is in contact with one side 1a of the side member 1 and one side 2a of the bracket 2 and is welded to these portions. The cross member 3 needs to be connected to the side member 1, and the connection pattern is such that the cross member 3 is directly connected to the side member 1 or indirectly through the bracket 2. May be connected.

As shown in FIG. 4, one end 3a of the cross member 3 has a lower portion 1c of the side member 1.
Protruding edge 6a protruding downward by an appropriate dimension H1
Is provided. The protruding edge portion 6a is connected to the side member 1 of the bracket 2 on one side surface portion 2a.
And is welded in contact with a portion protruding below the lower part 1c.

As means for projecting the one end 3a of the cross member 3 below the side member 1, for example, the height S of the one end 3a is used as the cross member 3.
However, the cross member 3 may be formed to be partially larger than the height Sb at the substantially central portion in the longitudinal direction. As means for partially increasing the height width of the one end 3a of the cross member 3 as described above, for example, the height width of this end is increased at the end of the main member constituting the cross member 3. For welding other members to join them together. However, the specific configuration of the cross member 3 used in the present invention is not limited to this.

As is clearly shown in FIG. 3, one of the two sets of connecting holes 22A and 22B of the bracket 2 is connected to one end 3a of the cross member 3 and the bracket 2 with one another. It is arranged in a region A2 below or substantially below the location. That is, when viewed from the side of the vehicle, the connection hole 22B is arranged so as to be located below or substantially below the joint between the one end 3a of the cross member 3 and the bracket 2.

The outrigger 4 is connected to the side member 1.
And extends in the vehicle width direction. The outrigger 4 serves as a bracket for mounting and supporting an exterior panel of a vehicle, for example.
It is formed in a form suitable for attaching an exterior panel. The outrigger 4 has high rigidity by being connected to an exterior panel of a vehicle.

One end 4a of the outrigger 4 comes into contact with the other side surface 1b of the side member 1 and the other side surface portion 2b of the bracket 2 and is welded to these portions. Is directly or indirectly linked to Note that the outrigger 4 is provided so as to be displaced in the vehicle front-rear direction from the connection position of the cross member 3 so that the outrigger 4 is stepped from the cross member 3 in plan view.

As shown in FIG. 4, one end 4a of the outrigger 4 is provided with a protruding edge 6b protruding downward by an appropriate dimension H2 from the lower portion 1c of the side member 1. The protruding edge portion 6b is welded in contact with a portion of the other side surface portion 2b of the bracket 2 that protrudes below the lower portion 1c of the side member 1. As a result, both end portions 3a, 4a of the cross member 3 and the outrigger 4 are attached to both side surfaces 2a, 2b of the bracket 2.
Is sandwiched between the two sides.

As shown in FIG. 3, the other connecting hole 22A of the bracket 2 is formed in a region A1 below or substantially below the joint between the one end 4a of the outrigger 4 and the bracket 2.
Are located in In other words, when viewed from the side of the vehicle, the connection hole 22A is formed at one end 4 of the outrigger 4.
It is arranged so as to be located below or substantially below the joint between the bracket a and the bracket 2.

In the structure of the suspension bracket having the above-described structure, the bracket 2 is attached so as to protrude below the lower portion 1c of the side member 1, but the bracket 2 is attached to both side surfaces 2a and 2b. A protruding edge 6a formed on one end 3a of the cross member 3 protruding below the side member 1 and a protruding edge 6b formed on one end 4a of the outrigger 4 are sandwiched from both sides of the bracket 2. Abuts and joins. Therefore, the strength of the bracket 2 in the vehicle width direction can be increased, and even if a load is applied to the bracket 2 in the vehicle width direction, the above-mentioned cross member can easily bend and deform in this direction. 3 and outrigger 4
Can be prevented by

As described above, the two ends of the upper control arm 5A and the lower control arm 5B of the suspension device are connected to the two sets of connection holes 22A and 22B of the bracket 2, respectively. Outriggers 4 are provided above the connecting holes 22A and 22B.
And the cross member 3. Therefore, the two sets of connecting holes 22A and 22B located therebelow.
Thus, the strength of the portion provided with is improved, and one end of each of the upper control arm 5A and the lower control arm 5B can be connected to a portion having a large strength.

As a result, the bracket 2 does not need to be unnecessarily thick, and the weight can be reduced. The cross member 3 and the outrigger 4 are originally attached to the vehicle, and the members 2 are appropriately used to reinforce the bracket 2. Therefore, the cross member 3 and the outrigger 4 are used. The overall structure does not become complicated. Further, since two control arms 5A and 5B can be connected to one bracket 2, two brackets are not required, and the overall configuration can be further simplified.

The specific configuration of the structure of the suspension bracket according to the present invention is not limited to that of the above-described embodiment, but is a specific example of each part such as the side member 1, the bracket 2, the cross member 3, and the outrigger 4. The design can be freely changed in various ways. The specific dimensions and the like of each end of the cross member 3 and the outrigger 4 projecting below the side member 1 are not limited. Further, the present invention is applicable to all vehicles including a suspension device having an upper control arm and a lower control arm, and is not particularly limited to a specific configuration of the suspension device.

[Brief description of the drawings]

FIG. 1 is an essential part perspective view showing an example of a structure of a suspension bracket to which the present invention is applied.

FIG. 2 is a plan view of a main part of FIG. 1;

FIG. 3 is a sectional view taken along line X1-X1 of FIG. 2;

FIG. 4 is a sectional view taken along line X2-X2 of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side member 2 Bracket 2a, 2b Both sides (of a bracket) 3 Cross member 3a One end (of a cross member) 4 Outrigger 4a One end (of an outrigger) 5A Upper control arm 5B Lower control arm 22A, 22B Connecting hole

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62D 21/11 B62D 21/00 B62D 21/02 B62D 25/20

Claims (1)

(57) [Claims] A side member extending in a vehicle longitudinal direction;
A bracket attached to the side member so as to protrude downward from the side member; and the bracket is connected to one end of each of an upper control arm and a lower control arm of a suspension device. A suspension bracket structure provided with two pairs of connection holes , wherein one end of each of a cross member and an outrigger connected to both the inside and outside of the side member in the vehicle width direction is formed from the side member. Is also formed to protrude downward
And more than the side members of the bracket
Place both sides of the part that protrudes downward in the vehicle front-rear direction.
Shiteso so as to sandwich from both sides in a state of being displaced in the had
Is bonded to these two side portions, and the two pairs of connecting holes, downwardly or substantially downwardly in the region of the respective locations of which one end portion is joined with the cross member and outrigger of the bracket A structure of a suspension bracket, wherein one set is arranged.