JPH07164845A - Linking part structure of rear suspension - Google Patents

Abstract

PURPOSE:To make improvements in quality assessment and reliability in heightening the extent of link supporting rigidity. CONSTITUTION:A rear triangular recess 12 is formed on the bottom wall of a rear side member 2 connected to the underside of a rear floor panel 1, while this linking structure is joined to a reinforcer 13 triangularly bent and formed bestriding two brackets 9 and 9 connected to both side walls of this rear side member 2, joining this reinforcer 13 to the recess 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear suspension link mounting structure.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show the structure of a link mounting portion of a conventional rear suspension. Reference numeral 1 is a rear floor panel, and 2 is a rear side member having an inverted hat cross section joined to the lower surface of both sides of the rear floor panel 1. , The strength skeleton portion extending in the front-rear direction of the vehicle body is formed.

Reference numeral 3 denotes a link whose rear end is fixed to both end portions of the axle beam 4, and has a front end which is composed of an inner cylinder 6 and an outer cylinder 7 and an elastic material 8 provided between the inner and outer cylinders 6 and 7. The vibration-proof bushing 5 is fixed.

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

This similar structure can be obtained, for example, from Japanese Utility Model Laid-Open No. 62-84.
It is disclosed in Japanese Patent No. 586.

[0006]

In addition to vertical input from the link 3, a twisting force acts on the brackets 9 and 9, but these brackets 9 and 9 are joined to the side wall surface of the rear side member 2. It is undeniable that this torsional force acts on the joint portion in the peeling direction, which is disadvantageous in terms of strength, resulting in a decrease in strength and rigidity.

Even if a U-shaped rain force is jointly arranged and reinforced across the bottom walls of the brackets 9 and 9 and the rear side member 2, the twisting force is applied to the joint portion of the rain force in the same peeling direction. As a result, the disadvantages of strength remain.

Therefore, the present invention provides a link mounting structure for a rear suspension, which can further improve the support rigidity of the link mounting part with a simple structure and can further improve the sense of quality and reliability. Is.

[0009]

[Means for Solving the Problems] A pair of brackets are joined to a lower portion of a rear side member joined to the lower surfaces of both side portions of a rear floor panel so as to be spaced apart in the vehicle width direction, and a link of a rear suspension link is provided between these brackets. In the structure in which the end portions are axially supported, a rear triangular recess is formed in the bottom wall of the rear side member, and a triangular bend-fitting rain fit that fits in the recess is joined across the pair of brackets. The rain force is fitted and joined to the recess.

[0010]

[Function] Since the triangular force is fitted and joined to the triangular concave portion, the torsional load of the link acts on the joint portion between the inclined surfaces in the shearing direction which is advantageous in terms of strength. The support rigidity of the link can be further enhanced against the torsional load.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings by attaching the same reference numerals to the same parts as those in the conventional structure.

In FIG. 1, brackets 9, 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. A vibration-proof bush 5 is fixed to the front end of the link 3, the bush 5 is arranged between the brackets 9 and 9, and the front end of the link 3 is pivotally supported by a support shaft 10 via the vibration-proof bush 5. The basic structure of, etc. is the same as the conventional one.

Here, the rear wall of the rear side member 2 is formed with a recess 12 having a rear triangular shape, and the rear side member 2 is bent into a triangular shape which fits in the recess 12 while straddling the pair of brackets 9, 9. A molded rainforth 13 is joined, and the rainforth 13 is fitted into the recess 12 so that the inclined surface and the top of the rainforth 13 are recessed 1.
It is joined to the fitting surface of 2.

The reinforcement 13 is set such that the lower edges of both sides thereof are slightly above the inner cylinder 6 projecting to both sides of the vibration-proof bush 5.

According to the structure of this embodiment, the bracket 9,
A road surface input acts on the link 9 in the vertical direction via the vibration-proof bushing 5 of the link 3, and a torsional load acts on the bushing 9 through the bushing 5. Therefore, this torsional load acts on the brackets 9 and 9 and the rear side member 2. The joint portion with the side wall tends to act in the peeling direction, which is disadvantageous in strength.

However, the top surface and the inclined surfaces of both sides of the reinforcement 13 joined between the brackets 9 and 9 have triangular recesses 12 in the bottom wall of the rear side member 2.
The torsional load is dispersed and borne by the joint portion between the rain force 13 and the concave portion 12, and especially at the joint portion between the rain face 13 and the concave portion 12, the torsional load is advantageous in terms of strength. Since it acts in the shearing direction, the load can be effectively transmitted to the rear side member 2 against the torsional load sufficiently, so that the support rigidity of the link 3 can be further enhanced and a lower muffled sound can be generated. The quality and reliability can be improved.

Further, when the front end of the link 3 is attached, the inner cylinder 6 of the vibration-proof bush 5 can be positioned by engaging with the lower edge of the rain force 13, so that the front end of the link 3 can be attached to the brackets 9, 9. The mounting work can be improved.

Further, the positions of the brackets 9 and 9 are determined by the fitting and joining of the rain force 13 and the recess 12 of the bottom wall of the rear side member 2, and the supporting span of the link 3 by the pair of brackets 9 and 9 on both sides of the floor. Since the dimensional accuracy can be increased, the workability of attaching the link 3 can be further improved.

FIG. 2 shows a vehicle in which the front side portion of the rear side member 2 is connected to the sill inner 14a of the side sill 14 so that the rigidity of the member is increased.

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 brackets 9 is joined to the bottom wall of the rear side member 2.
The recess 12 is formed in the bottom wall between the brackets 9, 9, and the operation and effect are substantially the same as in the case of the above-mentioned embodiment, so the description thereof will be omitted.

[0021]

As described above, according to the present invention, a torsional load acts on a pair of brackets joined to a rear side member via a link, and a triangular rain reinforcement joined across these brackets, At the joint part of each inclined surface of the triangular recess of the rear side member bottom wall,
Since this torsional load can be received in the shearing direction which is advantageous in terms of strength and the load can be effectively transmitted to the rear side member, the rigidity of link support is enhanced and a low muffled noise is not generated, resulting in a sense of quality and reliability. It can be further increased.

[Brief description of drawings]

FIG. 1 is a sectional view taken along the 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]

 1 Rear floor panel 2 Rear side member 3 Link 9 Bracket 12 Recess 13 Reinforce

Claims (1)

[Claims] 1. A pair of brackets are joined to a lower side portion of a rear side member joined to the lower surfaces of both side portions of a rear floor panel so as to be spaced apart from each other in the vehicle width direction, and an end portion of a link of a rear suspension is pivoted between the brackets. In the supported structure, a rear triangular recess is formed in the bottom wall of the rear side member, and a triangular bent bending fitting fitting into the recess is joined across the pair of brackets. A structure for attaching a link of a rear suspension, characterized in that the structure is fitted and joined to the recess.