JPS6332490Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stabilizer bushing for a vehicle suspension, and more specifically, a pair of left and right suspension bushes that are attached to the left and right sides of a vehicle body so as to be rotatable in the vertical direction and support the left and right wheels respectively. Both ends of the stabilizer, which is bent into a substantially U-shape, are connected to the suspension arm, and the middle part of the stabilizer is supported on the vehicle body by a mounting bracket via a stabilizer bush made of an elastic material. This invention relates to a stabilizer bushing for a vehicle suspension.

Generally, there are two types of stabilizer bushings: bushings made of resin such as polyurethane, and bushings made of rubber such as styrene-butadiene rubber. A resin bushing is used, which is more rigid than a rubber bushing. However, when using a resin bushing as the stabilizer bushing, if fine sand, mud, etc. enter between the inner periphery of the resin bushing and the outer periphery of the stabilizer, it may cause the stabilizer to twist or slide due to sideways movement when the vehicle turns. When the vehicle is in motion, the inner sliding contact surface of the resin bushing wears out more quickly than the rubber bushing, causing looseness between the resin bushing and the stabilizer, resulting in insufficient support of the intermediate part of the stabilizer to the vehicle body. The stabilizer may not function as initially set.

The present invention was devised to address this problem, and its main purpose is to prevent sand from entering between the inner periphery of the resin bushing and the outer periphery of the stabilizer without impairing the original function of the resin bushing. The purpose of the present invention is to prevent play between the stabilizer bush and the stabilizer by preventing early wear of the inner circumferential sliding surface of the stabilizer bush by being configured to prevent entry of mud and the like.

In order to achieve this purpose, in the present invention, this type of stabilizer bushing is comprised of a resin cylinder through which the middle part of the stabilizer can slide, and a resin cylinder provided at both ends of the cylinder and arranged on the outer circumferential side of the stabilizer. It is characterized by a pair of annular seal parts made of an elastic material that protrude and come into elastic contact with the outer peripheral part. As a result, in the present invention, the action of both annular seals reliably prevents sand, mud, etc. from entering the inner circumference of the cylinder and the outer circumferential surface of the stabilizer, and the inner peripheral sliding surface of the cylinder can be quickly removed. Since wear can be prevented, play between the cylinder and the stabilizer can be prevented. Therefore, according to the present invention, the original function of a resin bush in this type of stabilizer bush can be maintained for a long period of time, and the steering stability of the vehicle can be improved. In addition, in the stabilizer bushing of the present invention, a lubricant such as grease can be sealed between the inner periphery of the cylinder and the outer periphery of the stabilizer by the action of both annular seals. It is also possible to prevent sliding noise that occurs when the stabilizer slides due to twisting or side-to-side movement.

Hereinafter, embodiments of the present invention will be described based on the drawings. Fig. 1 shows a schematic configuration of a front suspension that employs a stabilizer bushing according to a first embodiment of the present invention, with some parts omitted. ing.
In the front suspension, the stabilizer 11 is bent into a substantially U-shape, and includes a torsion bar portion 11a extending in the left-right direction of the vehicle, and a pair of arm portions 11b bent from both ends thereof and extending toward the rear of the vehicle. It is structured accordingly. In this stabilizer 11, the rear ends of both arm parts 11b are attached to the middle part of a pair of left and right lower arms 13, which are attached to the left and right sides of the vehicle body 12 so as to be rotatable in the vertical direction. are connected. Further, the torsion bar portion 11a of the stabilizer 11 is supported at both ends of the vehicle body 12 by a mounting bracket 15 via a stabilizer bush 20 according to the present invention, which will be described later. Each of the lower arms 13 supports a front wheel 16 at its tip, and supports a shock absorber (not shown) or the like at an intermediate portion thereof.

Therefore, the stabilizer button 20 is
As shown in the figure and FIG. 3, a resin cylinder 21
and a pair of annular lip portions 22. The cylindrical body 21 includes an inner hole 21a through which the torsion bar portion 11a of the stabilizer 11 can slide.
It is provided with an axial slit portion 21b reaching the point a, and a protrusion 2 on the outer circumferential center of the slit portion 21b except for the upper surface.
It is equipped with 1c. Slit portion 21b of cylinder body 21
can be expanded and contracted by the elastic action of the cylindrical body 21, and functions to allow movement of the stabilizer bush 20 in the axial direction on the outer periphery of the stabilizer 11. Further, the protrusion 21c of the cylindrical body 21 is formed to fit into a groove 15a provided in the mounting bracket 15 shown in FIG. Function. On the other hand, both annular lip portions 22 are integrally formed with the cylindrical body 21 and extend a required length from the intermediate portions of both end faces of the cylindrical body 21 toward the center and outward. Mounting bracket 15
is fitted into the stabilizer bushing 20 from the lower side in the drawing and attached to the vehicle body 12, thereby supporting the torsion bar portion 11a of the stabilizer 11 to the vehicle body 12 via the stabilizer bushing 20. In this state, the mounting bracket 15
Due to the tightening action, the gap between the slit portion 21b of the cylinder body 21 in the stabilizer bushing 20 is reduced and almost disappears, and the circumferential surface of the inner hole 21a of the cylinder body 21 is brought into close contact with the outer circumferential surface of the torsion bar portion 11a of the stabilizer 11, and the torsion bar portion is closed. 11a. In this state, both annular lip portions 22 protrude outward from both end surfaces of the cylinder body 21 and toward the outer periphery of the torsion bar portion 11a, as shown in FIG. Contact elastically.

Stabilizer bushing 20 configured in this way
In this case, the cylindrical body 21 forming the main body functions in the same manner as a conventional resin bushing, and both annular lip parts 22 connect the inner periphery of the cylindrical body 21 and the torsion bar part 11.
It functions as a seal between the outer peripheries of 21 and 11a to prevent water, sand, mud, etc. from entering between these two 21 and 11a. Therefore, the heel stabilizer button 20
According to the above, when the torsion bar portion 11a slides due to twisting or side-to-side movement when the vehicle turns, the sand,
There is no wear on the circumferential surface of the inner hole 21a of the cylindrical body 21 due to mud, etc., and the generation of play between the cylindrical body 21 and the torsion bar portion 11a can be prevented, and the original function as a resin bushing can be maintained for a long time. The steering stability of the vehicle can be improved.

Further, in this stabilizer 20, both the annular lip portions 22 are connected to the cylinder body 21 and the torsion bar portion 1.
Since it has the function of sealing a lubricant such as grease between 1a, by sealing grease or the like between both 21 and 11a, it is possible to prevent the generation of sliding noise when the torsion bar portion 11a slides. .

FIG. 5 shows a second embodiment of the stabilizer bushing according to the present invention. The stabilizer bush 30 is comprised of a resin cylinder 31 and a pair of annular seals 32 fitted to both ends of the cylinder. The cylindrical body 31 has an inner hole 31a and a slit portion 31b, similar to the cylindrical body 21 in the first embodiment.
and a pair of annular recesses 3 at both ends thereof.
1d, and each seal portion 32 is fitted into each of these annular recesses 31d and fixed with an adhesive or the like. As shown in FIGS. 5 and 6, each annular seal portion 32 includes a ring 32a made of metal or resin with a slit portion having a required gap at both ends, and a ring made of rubber fixed to the entire inner circumference of the ring 32a. , and an annular lip portion 32b made of resin or the like.
Each lip portion 32b protrudes toward the outer periphery of the torsion bar portion 11a of the stabilizer 11, and its tip end resiliently abuts against the outer periphery of the torsion bar portion 11a.

Therefore, in the stabilizer bushing 30 as well, the cylindrical body 31 forming the main body functions in the same manner as a conventional resin bushing, and both annular seal portions 32 connect the inner periphery of the cylindrical body 31 and the outer periphery of the torsion bar portion 11a. Since it functions as a seal between the stabilizer bushings 20 and 20, it has the same effect as the stabilizer bushing 20 in the first embodiment.

In each of the above embodiments, the stabilizer bushing according to the present invention is used to support the stabilizer of the front suspension, but the stabilizer bushing according to the present invention is used to support the stabilizer of the rear suspension. It can also be used for support.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of a front suspension using a stabilizer bushing according to a first embodiment of the present invention, FIG. Figure 3 is a perspective view of a stabilizer bush that constitutes the support structure, Figure 4 is a perspective view of a mounting bracket that constitutes the support structure, and Figure 5 is a diagram showing the use of the stabilizer bush according to the second embodiment of the present invention. FIG. 6 is a longitudinal cross-sectional view corresponding to FIG. 2 showing the supporting structure of the torsion bar portion, and FIG. 6 is a perspective view of a seal portion constituting the stabilizer bush. Explanation of symbols, 11... Stabilizer, 11a...
...Torsion bar part, 12...Vehicle body, 13...Lower arm, 15...Mounting bracket, 20, 30...
... Stabilizer bush, 21, 31... Cylindrical body,
22...Rip part, 32...Seal part, 32a...
...Ring, 32b...Rip.

Claims (1)

[Scope of utility model registration request] Both ends of the stabilizer, which is bent in a substantially U-shape, are connected to a pair of left and right suspension arms that are attached to the left and right sides of the vehicle so as to be rotatable in the vertical direction and support the left and right wheels, respectively. In the vehicle suspension, the intermediate portion of the stabilizer is supported on the vehicle body by a mounting bracket via a stabilizer bush formed of an elastic material, wherein the intermediate portion of the stabilizer slidably passes through the stabilizer bush. It is characterized by being composed of a resin cylinder and a pair of annular seal parts made of an elastic material that are provided at both ends of the cylinder and project toward the outer circumference of the stabilizer and resiliently abut against the outer circumference. Stabilizer bushings for vehicle suspensions.