JP3109357B2 - Link mounting structure of rear 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 link mounting structure for a rear suspension.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a link mounting structure of a conventional rear suspension. Reference numeral 1 denotes a rear floor panel, and 2 denotes a rear side member having an inverted hat-shaped cross section joined to the lower surface on both sides of the rear floor panel 1. , And extends in the vehicle longitudinal direction to form a strength skeleton portion in the vehicle longitudinal direction.

[0003] Reference numeral 3 denotes a link having a rear end fixed to both side ends of the axle beam 4. The front end includes an inner cylinder 6 and an outer cylinder 7 and an elastic member 8 provided between the inner and outer cylinders 6 and 7. The anti-vibration bush 5 is fixed.

Brackets 9 and 9 are joined to both side walls of the rear side member 2, and an anti-vibration bush 5 at the front end of the link 3 is supported by a support shaft 10 between the brackets 9 and 9. Reference numeral 11 denotes a rear strut.

This similar structure is disclosed, for example, in Japanese Utility Model Application Laid-Open No. 62-84.
No. 586.

[0006]

The brackets 9, 9 are subjected to a torsional force in addition to the vertical input from the link 3, but these brackets 9, 9 are joined to the side wall surface of the rear side member 2. However, it cannot be denied that the torsional force acts on the joining portion in the peeling direction which is disadvantageous in strength, resulting in a decrease in strength and rigidity.

Even if a U-shaped rainforce is joined and reinforced over the brackets 9, 9 and the bottom wall of the rear side member 2, the torsional force is applied to the joint of the rainforce in the same peeling direction. In order to work, disadvantageous conditions remain in terms of strength.

Accordingly, the present invention provides a link mounting structure for a rear suspension, which can further enhance the rigidity of support of the link mounting portion with a simple structure and further improve the quality and reliability. It is.

[0009]

A pair of brackets are joined to the lower side of the rear side member joined to the lower surface on both sides of the rear floor panel and are spaced apart in the vehicle width direction. In the structure in which the ends are pivotally supported, a rear triangular concave portion is formed in the bottom wall of the rear side member, and a triangular bent-shaped rainforce that fits into the concave portion is joined across the pair of brackets. The inclined surface of the rainforce is fitted and joined to the fitting surface of the recess.

[0010]

[Function] Since the triangular reinforce is fitted and joined to the triangular recess, the torsional load of the link acts on the joint between the inclined surfaces in a shear direction which is advantageous in strength. The support rigidity of the link can be further increased against the torsional load.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings, in which the same reference numerals are given to the same parts as in the above-mentioned conventional construction.

In FIG. 1, brackets 9 and 9 are joined to both side walls of a rear side member 2 joined to lower surfaces of both sides of a rear floor panel 1, and a front end of a link 3 fixed to both end portions of an axle beam 4. Has a vibration isolating bush 5 fixed thereto, and the front end of the link 3 is arranged between the brackets 9, 9, and is supported by a support shaft 10 via the vibration isolating bush 5. , Etc. are the same as the conventional structure.

The rear side member 2 has a bottom wall formed with a concave portion 12 having a rear triangular shape, and is bent over the pair of brackets 9 into a triangular shape fitted into the concave portion 12. A molded rainforce 13 is joined, and the rainforce 13 is fitted into the recess 12 so that the inclined surface and the top of the rainforce 13 are recessed into the recess 1.
2 is joined to the fitting surface.

The rain force 13 is set at a position where the lower edges on both sides are slightly above the inner cylinder 6 projecting to both sides of the vibration isolating bush 5.

According to the structure of this embodiment, the bracket 9,
The road surface input acts on the link 9 in the vertical direction via the vibration isolating bush 5 of the link 3, and a torsional load acts on the bush 5. This torsional load is applied to the brackets 9, 9 and the rear side member 2. The joint with the side wall tends to act in a peeling direction that is disadvantageous in strength.

However, the top and the inclined surfaces on both sides of the rain force 13 joined across the brackets 9, 9 are formed in the triangular recess 12 in the bottom wall of the rear side member 2.
And the torsional load is distributed and burdened on the joint between the rainforce 13 and the concave portion 12, and the torsional load is advantageous in strength at the joint between the inclined surfaces of the rainforce 13 and the concave portion 12. Since it acts in the shearing direction, the load can be effectively transmitted to the rear side member 2 sufficiently against the torsional load. Therefore, the supporting rigidity of the link 3 can be further increased to generate a low-level muffled sound or the like. Quality and reliability can be improved.

When the front end of the link 3 is attached, the inner cylinder 6 of the vibration isolating bush 5 can be positioned by engaging with the lower edge of the rainforce 13, so that the front end of the link 3 can be attached to the brackets 9, 9. Mounting work can be improved.

Further, the fitting of the rain force 13 and the concave portion 12 of the bottom wall of the rear side member 2 determines the position of the brackets 9, 9, and the support span of the link 3 by the pair of brackets 9, 9 on both sides of the floor. Since the dimensional accuracy can be improved, the workability of attaching the link 3 can be further improved.

FIG. 2 shows a vehicle in which the front side of the rear side member 2 is connected to the sill inner 14a of the side sill 14 to increase the rigidity of the member, and the present invention is applied to the vehicle.

In this embodiment, one of the brackets 9 is joined to the side wall of the rear side member 2 on the floor center side, and the other of the bracket 9 is joined to the bottom wall of the rear side member 2.
The concave portion 12 is formed in the bottom wall between the brackets 9 and 9, and the operation and effect are substantially the same as in the case of the above-described embodiment, so that the description will be omitted.

[0021]

As described above, according to the present invention, a torsion load is applied to the pair of brackets joined to the rear side member via the link. At the junction of the inclined surfaces of the triangular recess on the bottom wall of the rear side member,
Since this torsional load can be received in the shear direction that is advantageous in terms of strength, the load can be effectively transmitted to the rear side member, so that the link support rigidity is increased and low-grade muffled noise is not generated, and quality and reliability are improved. Can be further increased.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line AA of FIG. 3 showing a first embodiment of the present invention.

FIG. 2 is a sectional view similar to FIG. 1, showing a second embodiment of the present invention;

FIG. 3 is a schematic side view showing an arrangement state of links.

FIG. 4 is a sectional view similar to FIG. 1, showing a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rear floor panel 2 Rear side member 3 Link 9 Bracket 12 Recess 13 Rainfall

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60G 7/00 B62D 21/11 B62D 25/20

Claims (1)

(57) [Claims] 1. A pair of brackets are joined to a lower portion of a rear side member joined to a lower surface of both sides of a rear floor panel and separated from each other in a vehicle width direction, and an end of a link of a rear suspension link is provided between the brackets. In the supporting structure, a rear triangular concave portion is formed in the bottom wall of the rear side member, and a triangular bent-shaped rainforce that fits into the concave portion is joined across the pair of brackets . fitting of the inclined surface the recess
A link mounting portion structure for a rear suspension, wherein the link mounting portion is fitted and joined to a surface .