JPH0379822A - Support structure for oscillating body - Google Patents

Abstract

PURPOSE:To miniaturize a support part and reduce foreign substances entering elastic bushing side of a mounting cylinder by forming a stopper between a collar part formed at a bottom end of a mounting pin and a contracted diameter part positioned thereabove, in the mounting cylinder. CONSTITUTION:In a mounting cylinder 14, a contracted diameter part 22a is arranged while a nut 20 and a washer 24 are housed inside the part 22a at a bottom end of a mounting pin 18 to prevent the protrusion from the bottom end. As a result, though a stopper function against upward and downward movement is conducted as usual, the axial and diametrical contraction of a support part of a suspension member 10 is attained for the minituarization of the support part. A labyrinthine confined passage is formed by communicating with a lower opening part 14a of the mounting cylinder 14 through a clearance between an inner periphery of the contracted diameter part 22a and an inner cylinder 12a and a clearance between an outer periphery of the washer 24 and a cylinder body 22, and by arranging the contracted diameter part 22a and the washer 24 as obstacle walls. Foreign substances such as muddy washer entering an elastic bushing side through the lower opening part 14a is remarkably reduced accordingly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a support structure for a rocking body supported by a support body through an elastic bushing so as to be relatively rockable.

BACKGROUND ART As a support structure for this type of rocking body, for example, there is a part that supports the suspension member of a vehicle as a rocking body on the vehicle body side.
The configuration is disclosed in the publication.

That is, FIG. 3 shows a support structure for a suspension member 1 using such conventional technology, in which a mounting tube 2 fixed to an end of the suspension member 1 is attached to a mounting pin 4 vertically mounted from a vehicle body 3. It is fitted through an elastic bush 5.

In the support structure of the suspension member 1,
The mounting pin 4 and the inner cylinder 5a of the elastic bushing 5 are made to protrude from the lower end of the mounting cylinder 2, respectively, and a flange is provided between the nut 6 screwed onto the lower end of the mounting pin 4 and the inner cylinder 5a. 7 is fixed, and a strike and y parer 8 is provided between the flange 7 and the lower end of the mounting WJ2, and the mounting tube 2
A stopper rubber 8a is provided between the upper end of the vehicle body 3,
When the suspension member 1 is greatly swung up and down, these stopper rubbers 8 and 8a restrict further displacement.

Further, the outer peripheral edge of the flange 7 is bent downward to form a chipping protector 9, which protects the nut 6 from flying stones and the like.

Problems to be Solved by the Invention However, in such a conventional support structure for the suspension member 1, the mounting pin 4 protrudes further downward from the lower end of the mounting WJ2, and the nut 6, chipping protector 9, etc. are attached to the lower end. Since the suspension member 1 is attached, the support portion of the suspension member 1 becomes longer in the axial direction, and the collar portion 7 is provided with the stopper rubber 8.
Since the diameter is larger than that of the mounting tube 2, the supporting portion of the suspension member 1 becomes large.

In addition, a gap S is formed between the mounting tube 2 and the flange 7, and foreign matter such as muddy water splashed from the gap S enters the mounting tube 2. Elastic bushing 5
There were various problems such as deterioration of durability.

In view of such conventional problems, the present invention has been developed to provide a rocking body that can reduce the size of the supporting portion of the rocking body and can significantly reduce the entry of foreign matter into the elastic bushing side in the mounting cylinder. The purpose is to provide a supporting structure.

Means for Solving the Problems In order to achieve the object, the present invention includes a support body and a rocking body that is vertically swung relative to the support body,
In a support structure for a rocking body in which a mounting cylinder provided on the rocking body is fitted onto a mounting pin vertically provided from a support body through an elastic bushing, the lower end of the mounting pin is housed in the mounting cylinder. In addition, a flange is provided at the lower end of the mounting pin, and a reduced diameter portion located above the flange is formed inside the mounting tube, and a stopper is provided between the flange and the reduced diameter portion. Configure.

In the support structure for a rocking body of the present invention with the above-described configuration, the lower end of the mounting pin provided with the flange is housed in the mounting cylinder, and a diameter-reduced portion is formed inside the mounting cylinder, Since the stopper is formed between the collar portion and the reduced diameter portion, these stopper components are prevented from protruding from the lower end of the mounting tube.

Further, by disposing the flange portion and the reduced diameter portion in the mounting tube, the flange portion and the reduced diameter portion can serve as an obstacle wall for the lower opening of the attachment tube. The flange portion and the reduced diameter portion can significantly reduce the entry of foreign matter such as muddy water into the mounting cylinder.

Example Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

That is, FIG. 1 shows an embodiment of a support structure for a rocking body according to the present invention, and a case in which the present invention is applied to a suspension member 10 as a rocking body will be described below.

The suspension member IO is arranged in the left-right direction of the vehicle, and a wheel support member (not shown) such as a suspension link or a suspension arm is elastically supported by the suspension member 10.
Both ends thereof are elastically supported on the vehicle body side via elastic bushings 12.

The elastic bushing 12 includes an inner cylinder 12a, an outer cylinder 12b,
Elastic body 1 loaded between these inner and outer cylinders 12a and 12b
2c, while the above Susvenge 3
A mounting tube 14 is fixedly attached to the end of the member 10 by welding or the like, and the outer tube 12b is press-fitted inside the upper end of the attaching tube 14.

On the other hand, a mounting pin 18 is suspended from the vehicle body 16 as a support, the inner cylinder 12a of the elastic bushing 12 is fitted into the mounting pin 18, and a screw is formed at the lower end of the mounting pin 18. The inner cylinder 12a and the mounting pin 18 are coupled by tightening a nut 20 screwed onto the portion 18a.

By the way, a cylindrical body 22 is press-fitted and fixed inside the lower end of the inner cylinder 12a, and a reduced diameter portion 22 is attached to the upper end of the cylindrical body 22.
2a is formed, and the inner cylinder 12a is inserted into the opening 22b formed inside the reduced diameter part 22a.
The lower end is positioned below the diameter-reduced portion 22a.

Further, the lower end of the mounting pin 18 and the nuts 1-20 screwed to the lower end are housed in the cylinder 22, and the mounting pin 18 and nut 20 are inserted from the lower end of the mounting cylinder 14.
is designed so that it does not stand out.

On the other hand, between the nut 20 and the inner cylinder 12a, there is a washer 2 as a flange having a diameter larger than the opening 22b.
4 is clamped, and an annular stopper rubber 26 is fixed to the lower side of the reduced diameter portion 22a with an appropriate spacing between the washer 22 and the washer 22.

Further, a stopper rubber 28 integrally molded from the elastic body 12c is provided at the upper end of the outer cylinder 12b of the elastic pusher L12, and an appropriate interval is provided between the stopper rubber 28 and the vehicle body 16. .

With the above configuration, the suspension member 10 of this embodiment
With this support structure, road vibrations from wheels (not shown) input to the suspension member IO can be significantly reduced from being input to the vehicle body 16 by the buffering function of the elastic bushing 12.

Further, when the suspension member 10 swings downward significantly due to shearing deformation of the elastic body 12C, the stopper rubber 26 provided below the reduced diameter portion 22a comes into contact with the washer 22, causing further displacement. is regulated, while
When the suspension member 10 swings upward significantly, a stopper rubber 28 provided at the upper end of the mounting tube 14 comes into contact with the vehicle body 16 to restrict further displacement.

By the way, in this embodiment, the reduced diameter portion 2 is provided inside the mounting tube 14.
2a and a cylinder 22 in which the reduced diameter portion 22 is formed.
The lower end of the mounting pin 18, the nut 20, and the washer 22 are housed inside the mounting tube 14 to prevent them from protruding from the lower end of the mounting tube 14. Similarly, although the vertical displacement stopper function is performed, it is possible to shorten the supporting portion of the suspension member 10 in the axial direction and to reduce the diameter thereof, thereby making it possible to downsize the supporting portion.

Further, the inside of the mounting cylinder 14 is provided below the mounting cylinder 14 via a gap δ1 between the inner periphery of the reduced diameter portion 22a and the inner cylinder 12a, and a gap δ between the outer periphery of the washer 22 and the cylinder body 22. These δ1. Since δ is configured as a labyrinth-like narrow passage with the reduced diameter portion 22a and the washer 22 as an obstacle wall, the lower opening 14a
Therefore, it is possible to significantly reduce foreign matter such as muddy water from entering inside the mounting tube 14 in which the elastic bushing 12 is housed.

Additionally, since the nut 20 screwed onto the lower end of the mounting pin 18 is housed inside the lower end of the mounting tube 14, the lower end can also be used as a chipping protector, protecting the nut 20 from flying stones, etc. can do.

By the way, in the above embodiment, the washer 22 is used as the flange that comes into contact with the stopper rubber 26, and the nut 20 and the inner cylinder 12 are connected to each other.
Although the nut 30 which is clamped between the nut 20 and the flange 30a is used instead of the nut 20 as shown in FIG. The flange 30a of the nut 30 can be used as a flange, and the washer 22 used in the above embodiment can be eliminated, thereby reducing the number of parts.

As described in detail of the invention, in the support structure of the rocking body of the present invention, the lower end of the mounting pin vertically disposed from the support body is housed in the mounting cylinder provided on the rocking body, and the mounting pin A flange is provided at the lower end of the mounting tube, and a reduced diameter portion located above the flange is formed inside the mounting tube, and a stopper is configured between the flange and the reduced diameter portion. These strut and y par components are prevented from protruding from the lower end of the swing body, and the support portion of the rocking body can be made smaller.

Further, by disposing the flange portion and the reduced diameter portion in the mounting tube, the flange portion and the reduced diameter portion can serve as an obstacle wall for the lower opening of the attachment tube. The flange portion and reduced diameter portion significantly reduce the entry of foreign matter such as muddy water into the mounting cylinder, and greatly improve the durability of the elastic bushings housed within the mounting cylinder. It has a great effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is a sectional view of a main part showing another embodiment of the invention, and FIG. 3 is a sectional view showing a conventional support structure. DESCRIPTION OF SYMBOLS 10... Suspension member 12... Elastic bushing, 14... Mounting tube, 14a... Lower opening, 1
6... Vehicle body, 18... Mounting pin, 20... Nut, 22a... Reduced diameter part, 24... Washer (flange part),
26...Stopper rubber, 30...Natsuto, 30
a...7 lunge (tsuba). Figure 3

Claims (1)

[Claims] (1) A support body and a rocking body that is vertically swung relative to the support body, and a mounting tube provided on the rocking body,
In a support structure for a rocking body that is fitted via an elastic bush to a mounting pin vertically disposed from a support body, a lower end of the mounting pin is housed in the mounting cylinder, and
A flange is provided at the lower end of the mounting pin, and a reduced diameter part is formed inside the mounting tube located above the flange, and a stopper is configured between the flange and the reduced diameter part. Characteristic support structure of the rocking body.