JP3390626B2 - Damper mounting structure for torsion beam suspension - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper mounting structure in a torsion beam type suspension.

[0002]

2. Description of the Related Art FIG. 5 shows a torsion beam type suspension, in which knuckles 2 and 2 are attached to the left and right ends of a torsion beam 1 which is long in the left-right direction, and stiffeners 3 are attached to the left and right ends of the torsion beam 1. Attached to the stiffener 3 and extends forward to the arm 4
And the bracket 5 are welded to each other, and the lower end of the damper 6 is pivotally attached to the bracket 5 by a pivot bolt 7.

[0003] bracket 5 is formed in a substantially U shape, as shown in FIG. 6, it is welded to the bottom plate portion of the bracket 5 on the upper surface of the stiffener 3.

[0004]

When the above conventional example is applied to a heavy vehicle, when a load inclined in the front-rear direction as shown by F in FIG. 6 acts on the bracket 5 via the damper 6. The welded portion of the bracket 5 may peel off due to the horizontal component force in the front-rear direction.

In view of the above points, the present invention has an object to improve the mounting strength of the bracket against the horizontal component force in the front-rear direction.

[0006]

[Means for Solving the Problems] In order to solve the above problems,
The present invention relates to a damper mounting structure in a torsion beam suspension, in which a pair of front and rear legs extending downward are integrally formed on a bracket to which the damper is attached, and the legs have a U-shaped cross section having front and rear surfaces parallel to each other. In shape
A plate member having two congruent shapes, the left and right brackets being welded to the front and rear surfaces of the formed torsion beam, respectively.
It is characterized in that it is formed by .

According to this, the horizontal component force in the front-rear direction is received by the torsion beam via the legs. Therefore, the mounting strength of the bracket with respect to the horizontal component force in the front-rear direction is improved, and the bracket does not separate from the torsion beam even when applied to a heavy vehicle.

By the way, in order to integrally form the leg portion in the conventional U-shaped bracket, it is necessary to make the bracket by casting, which results in high cost and heavy weight. On the other hand, if the bracket is formed of two plate members on the left and right, it is sufficient to punch each plate member into a shape having legs.
Cost reduction and weight reduction can be achieved. In this case, if the two left and right plate materials are formed in a congruent shape, it is advantageous because the cost can be further reduced by sharing the parts. Further, if each plate member is bent in a convex shape in plan view, the torsional rigidity can be improved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a torsion beam type suspension. The basic configuration is the same as that of the conventional example shown in FIG. 5 except for a bracket 5 and its mounting structure. The same members as those shown in FIG. 5 are assigned the same reference numerals as those in FIG. 5, and the description of members other than the bracket 5 is omitted.

As shown in FIG. 2, the bracket 5 is formed of two plate members 50, 50 on the left and right. And, as clearly shown in FIG.
The pair of legs 5a, 5a are integrally formed, and both legs 5a, 5a are formed.
Are welded to both front and rear sides of the stiffener 3.

According to this, even if a load inclined in the front-rear direction as shown by F in FIG. 3 acts on the bracket 5, the horizontal component force in the front-rear direction is passed through the leg portion 5a, that is, the stiffener 3, that is,
Received with torsion beam 1. Therefore, the mounting strength of the bracket 5 against the horizontal component force in the front-rear direction is improved.

Further, the left and right plate members 50, 50 are bent in a convex shape in a plan view as shown in FIG. 4, whereby the torsional rigidity of the bracket 5 is improved.

Further, the left and right plate members 50, 50 are formed with holes 5b through which the pivot bolts 7 of the damper 6 are inserted.
A nut 8 for screwing the pivot bolt 7 is welded to the outer surface of one plate member 50. However, the left and right plate materials 50,
The shapes of 50 themselves are congruent with each other. Therefore, the cost can be reduced by sharing the parts.

[ 0014 ]

As is apparent from the above description, according to the invention of claim 1, the mounting strength of the bracket against the horizontal component force in the front-rear direction can be improved, and the weight of the bracket can be reduced and the cost can be reduced. According to the invention of claim 2, the torsional rigidity of the bracket can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a torsion beam type suspension to which the present invention is applied.

FIG. 2 is a front view of an arrangement portion of a bracket.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a plan view of an arrangement portion of a bracket.

FIG. 5 shows a conventional torsion beam type suspension.
Perspective view

6 is a sectional view taken along the line VII-VII in FIG.

[Explanation of symbols]

1 Torsion Beam 5 Bracket 5a Leg 50 Plate 6 Damper

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-8-142622 (JP, A) Actually open 2-141508 (JP, U) Actually open 63-150806 (JP, U) Actual public 61- 39603 (JP, Y2) S. 61-37527 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60G 9/00-9/04 B60G 13/06-13/08

Claims (2)

(57) [Claims] 1. A structure for mounting a damper in a torsion beam suspension, wherein a pair of front and rear legs extending downward are integrally formed on a bracket for mounting the damper, and the legs have a cross section U having a front surface and a rear surface parallel to each other. A damper mounting structure in a torsion beam type suspension, characterized in that the front and rear surfaces of a letter-shaped torsion beam are respectively welded, and the bracket is formed of two plate members having a congruent shape on the left and right sides. 2. The damper mounting structure for a torsion beam suspension according to claim 1, wherein each of the plate members is bent in a convex shape in a plan view.