JPH0539922Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a mounting structure for a suspension arm formed in a bifurcated shape.

(Prior art) For example, in a double wishbone type suspension, two bushes and a long distance collar are interposed at the end of the upper arm, and a bolt is inserted into the upper arm, and a headed bolt is inserted around the outer periphery of both ends of the bolt. The through holes formed in the head are fitted together,
The connection of the head bolt to the car body was disclosed in Japanese Patent Application Publication No. 1983-
It is disclosed in No. 96007, and this makes it easier to attach it to the vehicle body.

(Problem to be solved by the invention) By the way, when the damper is arranged vertically through the upper arm, it is necessary to provide a vertical hole in the upper arm or form the upper arm into a bifurcated shape. Since the long distance collar is provided at the end as described above, the damper must be arranged avoiding this distance collar, and it is desirable to secure a space for arranging the damper.

Therefore, an object of the present invention is to provide a suspension arm mounting structure that eliminates the long distance collar that was conventionally required and allows a space for damper placement to be secured.

(Means for Solving the Problems) In order to solve the above problems and achieve the purpose, the present invention has a suspension arm 1 formed in a bifurcated shape.
A pair of side surfaces 1 facing each other at each bifurcated end of
1 and 11, respectively, a bolt 2 is installed between the side parts 11 and 11, a bushing 4 is fitted on the outer periphery of the bolt 2, and a head 51 of the headed bolt 5 is fitted on the outer periphery of the bushing 4. It is characterized in that the formed through holes 52 are fitted together and the head bolt 5 is coupled to the vehicle body 7.

(Function) Since there is no conventional long distance collar between the bifurcated ends of the suspension arm 1, a space S for arranging the damper D can be secured.

(Example) Examples will be described below based on the accompanying drawings.

As shown in FIGS. 1 and 2, the suspension arm 1, which is formed into a bifurcated shape, is an upper arm in a double wishbone type suspension, and each bifurcated end of the suspension arm 1 has a pair of opposing arms. Bolt through holes 12, 12 are formed in each side surface part 11, 11, respectively, and a ball for a nutcle (not shown) is formed at the other continuous end of the suspension arm 1. A joint 13 is provided. The suspension arm 1 is attached to the vehicle body at each side surface 11, 11 of the bifurcated end via a bolt 2, a nut 3, an elastic bush 4, and a headed bolt 5.

As also shown in FIG.
1 has a through hole 52, and has a head 51 and a stepped portion 5.
A serration 56 is carved on the outer periphery of the large-diameter base 55 of the male threaded portion 54 that is continuous with three threads. The outer bush 42 of the elastic bush 4 is fitted into the head through hole 52 of the head bolt 5.

Then, an elastic bushing 4 is placed between the side surfaces 11, 11 of the bifurcated end of the suspension arm 1,
Bolt through holes 12, 12 and inner collar 41
Insert the bolt 2 inside and screw the nut 3.

Further, a rotation preventing stay 6 made of a plate material is installed between the two headed bolts 5, 5. That is, each end 61 of the detent stay 6 is engaged with the serration 56 on the outer periphery of the large-diameter base 55 below each male threaded portion 54, and brought into contact with the upper surface of the stepped portion 53. The middle part of this anti-rotation stay 6 is a line segment L connecting between the headed bolts 5, 5.
It is formed into a curved portion 62 that curves further outward.

On the other hand, as shown in FIG. 3, the vehicle body 7 is a wheel house portion, and has a box cross section 75 formed by welding an inner panel 71 and an outer panel 76 at the top and bottom. Two bolt holes 72 and 77 are formed in each of the inner panel 71 and the outer panel 76, and the bolt holes 77 on the bottom surface have a larger diameter than the bolt holes 72 on the top surface. A distance collar 8 is welded between the lower surface of the bolt through hole 72 and the upper surface of the bolt through hole 77 with washers 73 and 78 interposed therein. 82.

To attach the suspension arm 1 to the vehicle body 7, the side surfaces 11, 11 of the bifurcated end of the suspension arm 1 are exposed below the box section 75 of the vehicle body 7, and the bifurcated end of the suspension arm 1 is attached to the vehicle body 7. The male threaded portion 54 of the headed bolt 5, which swings upward and is provided between the side portions 11 and 11 via the bolt 2 and the elastic bushing 4, is inserted into the box cross section 75 of the vehicle body 7 as shown in FIG. do.

At this time, the bolt through hole 77 on the lower surface of the box cross section 75 has a large diameter, and the male threaded portion of the headed bolt 5
4 enters the large diameter portion 82 of the distance collar 8 through this bolt through hole 77, and then enters the male threaded portion 54.
The lower large-diameter base portion 55 is fitted into the large-diameter portion 82 of the distance collar 82, and the tip of the male screw portion 54 projects upward through the small-diameter upper end portion 81 of the distance collar 8. The nut 9 is screwed onto the tip of this male threaded portion 54 to complete the assembly.

Since the suspension arm 1 is attached to the box cross-section of the vehicle body 7 in this way, the damper D can be installed vertically in a relatively large space S surrounded by the suspension arm 1 and the anti-rotation stay 6 as shown in FIG. It can be conveniently arranged in terms of space.

In addition, a rotation stopper stay 6 is provided between the head bolts 5 and 5.
Since the nut 9 is installed, each head bolt 5 is reliably prevented from rotating when the nut 9 is screwed into the male threaded portion 54, and prying of the elastic rubber 43 of the elastic bush 4 when the nut 9 is screwed can be prevented.

(Effects of the invention) As described above, according to the invention, it is possible to eliminate the long distance collar between each bifurcated end of the suspension arm, and it is possible to secure the space for damper placement. This increases the degree of freedom when designing the suspension and makes it possible to easily set wheel alignment. In addition, it is now possible to press a plate-shaped steel plate, and the end can be processed to have a pair of opposing side surfaces, which improves productivity and at the same time reduces the weight of the suspension. You can also do it.

Furthermore, a head bolt with the outer periphery of the bushing fitted into the through hole is installed between a pair of opposing side surfaces provided at each end of the upper arm (this can be provided to produce the upper arm by press working). Work efficiency is improved because bolts are installed and the upper arm is connected to the vehicle body.

[Brief explanation of the drawing]

1 and 2 are a plan view and a front view of the suspension arm assembly, and FIGS. 3 and 4 are a front view and a side view of the suspension arm assembly with a main part cut away in a state where it is attached to a vehicle body. In addition, in the drawing, 1 is the suspension arm, 11
is a side view of the bifurcated end, 12 is the bolt through hole, 2
is a bolt, 3 is a nut, 4 is an elastic bush, 5 is a bolt with a head, 51 is a head, 52 is a through hole, 56 is a serration, 6 is a rotation stop stay, 7 is a car body,
9 is a nut, D is a damper, and S is a damper arrangement space.

Claims (1)

[Claims for Utility Model Registration] A pair of opposing side surfaces are provided at each end of the bifurcated suspension arm, and a bolt is installed between the side surfaces, A suspension arm attachment characterized in that a bushing is fitted on the outer periphery, a through hole formed in the head of a head bolt is fitted on the outer periphery of the bushing, and the head bolt is coupled to the vehicle body. structure.