JPH0621765Y2 - Vehicle stabilizer bush - Google Patents

Description

[Detailed Description of the Invention] <Industrial application field> The present invention relates to a rubber vehicle stabilizer bush having a sliding surface, and particularly for mounting a stabilizer in a vehicle suspension on a vehicle body or the suspension. Regarding rubber bushings used.

<Prior Art> The conventional stabilizer bush 1 has, for example, the structure shown in FIGS.
619).

An inner peripheral surface 3 for holding the stabilizer bar 11, and a flat surface 5 for attaching to the suspension or the vehicle body sheet metal 13.
It was a tubular body composed of a and the outer peripheral surface 5 formed in the axial direction, and was made of all rubber. And
In this mounting mode, as shown in FIG. 8, with the stabilizer bar 11 inserted and held on the inner peripheral surface 3 of the bush 1,
Holding the outer peripheral surface 5 with the clamp 15, the clamp 1
5 was fixed to the metal plate 13 of the vehicle body by a fastener 17 such as a bolt or nut. At this time, the stabilizer bar 11
Is held slidably, that is, rotatably on the inner peripheral surface 3 of the bush 1 when receiving the torsional action.

Reference numeral 7 in the drawing is a slit portion formed so as to reach the inner peripheral surface 3 from the flat surface 5a. As shown in FIG. 9, the stabilizer bush 1 is expanded in the circumferential direction from the slit portion 7, and the stabilizer bar 11 is fitted in from the outer peripheral direction to assemble the both.

<Problems to be Solved by the Invention> Recently, it has been known that reducing the torsional torque when the stabilizer bar receives a torsional effect is effective in improving the riding comfort of the vehicle. However, even if an attempt is made to reduce the torsion torque of the stabilizer bar, the stabilizer bar 11 and the bush 1 have a high friction coefficient due to the metal-rubber contact, and it is difficult to reduce the torsion torque.

Therefore, it is conceivable to loosen the fitting of the stabilizer bar 11 to the bush 1 to reduce the torsion torque of the stabilizer bar, but this time, the spring constant of the bush becomes unstable, which adversely affects the running stability, which is not desirable.

Therefore, in order to solve the above problems, the present inventors have
In the process of earnestly developing, I came up with the idea of forming the sliding surface (usually the inner peripheral surface) of the bush with a hard resin ring portion with a small friction coefficient against the stabilizer bar.

However, when a hard ring portion is provided on the sliding surface, the rigidity when expanding the stabilizer bush 1 from the slit portion 7 becomes strong as shown in FIG. Therefore, since it becomes difficult to expand the stabilizer bush 1, it becomes difficult to assemble the stabilizer bush 1 and the stabilizer bar 11 to each other.

<Means for Solving Problems> Since the present invention was made in consideration of the above problems,
(A) A ring made of a hard synthetic resin is provided on the sliding surface of the cylindrical rubber main body, (a) a slit is formed in the rubber main body and the ring, ) In the rubber main body portion, in order to release the meat deformation when expanding from the slit portion, a meat sloping groove that is substantially symmetrical with respect to the slit portion and the axial center is formed. A stabilizer bush for a vehicle, which satisfies the requirement that the slit is substantially symmetrically divided with respect to the axial center or that an integral hinge is provided that is substantially symmetrical.

<Example> An example of the present invention will be described below.

(First Embodiment) A stabilizer bush 21 of this embodiment is composed of a rubber main body portion 22 and a ring portion 26 (Fig. 1). still,
The same members as those of the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

In terms of shape, the rubber main body portion 22 of the embodiment is such that, in the stabilizer bush 1 of the conventional example, a carved groove 24 that is substantially symmetrical with the slit portion 7 and the axial center is formed on the inner peripheral surface 3. Is characterized by. As shown in FIG. 2, the fillet groove 24 is a wall deformation of the peripheral wall caused by expanding the rubber main body portion 22 when the stabilizer bar 11 is mounted-mainly symmetrical with the slit portion 7 and the axial center. It is for missing the − that occurs at a certain position. As a result, the rigidity with respect to the expansion of the rubber body portion 22 is reduced, and the assembling property is improved.

The ring portion 26 is a two-piece product made of hard synthetic resin, which is provided in close contact with the inner peripheral surface 3 of the rubber main body portion 22. One of the split portions communicates with the slit portion 7 of the rubber main body portion 22 (the slit portion 27 of the ring portion 26), and the other split portion is located above the fillet groove 24 formed in the rubber main body portion 22. (Cutting part 29). As a result, as shown in FIG. 2, when the stabilizer bush 21 is expanded from the slit portions 7 and 27, the ring portion 26 made of a hard synthetic resin and having a high rigidity is attached to the cut portion 2.
It will be cracked at 9, and it will not be the resistance when expanding.

As described above, the formation position of the cut portion 29 is preferably located on the meat fillet groove 24. Therefore, when viewed from the cut portion 27, the cut portion 29 is symmetrical with respect to the axial center.

As shown in FIG. 3, it is preferable to form a detent groove 26a on the surface of the ring portion 26.

The material for forming the rubber main body 22 and the ring 26 described above is, from the viewpoint of the adhesiveness between the two, the rubber main body, the ring (1) the silicon dioxide-containing vinylidene fluoride rubber compound resin (2) An example is a combination of a rubber compound containing a polar rubber as a polymer hard polyethylene component and a resin.

Regarding the combination of the above (1), JP-A-60-5233
See Publication No. 6.

Regarding the combination of (2) above, EPDM, SBR, IIR or NR etc. can be exemplified as the non-polar rubber, and general high density polyethylene etc. can be exemplified as the hard polyethylene resin.

The stabilizer 21 is manufactured by the rubber main body 2
2 and the ring portion 26 are separately molded by extrusion or injection (or transfer), and the ring portion 26 is press-fitted into the rubber main body portion 22 and heated to heat-seal (or vulcanize) both.
To do. Alternatively, the rubber main body portion 22 and the ring portion 26 are simultaneously extruded and cut into a predetermined length, or the rubber main body portion 9 is injected by using the ring portion 26 extruded and cut into a predetermined length as an insert. After transfer molding, the slits 7, 27 and the cutting portion 29 are cut open.

The stabilizer bush thus formed is used by being attached to a vehicle body sheet metal by holding the stabilizer bar on the inner peripheral surface and holding the outer peripheral surface by a U-shaped clamp as in the conventional case.

At this time, the stabilizer bar receives a twisting action, but the stabilizer bar uses the inner peripheral surface of the ring portion made of vinylidene fluoride resin having a small friction coefficient as the sliding surface, so the torsion torque of the stabilizer bar does not become high, Good riding comfort. As a matter of course, the bush and the stabilizer bar are not loosely fitted to each other, so that the running stability of the vehicle is good.

In the above embodiments, the case where the inner peripheral surface of the bush is the sliding surface is taken as an example, but the outer surface or the intermediate surface of the bush may be the sliding surface.

Next, another embodiment will be described.

(Second Embodiment) FIG. 4 shows a front view of a stabilizer bush 31 of another embodiment. This embodiment is characterized in that, in the first embodiment, the meat-thinned groove 34 is formed from the outer peripheral surface 5 of the rubber main body portion 22.

In this embodiment, the ring portion 26 is held by the rubber main body portion 22 over the entire circumference, and the roundness thereof is maintained more than that of the first embodiment.

Further, as shown in FIG. 5, the cross-section area of the meat-thin groove 24 formed from the circumferential surface 3 of the rubber main body 22 may be reduced, and the meat-thin groove 34 may be provided in parallel on the outer peripheral surface 5.

(Third Embodiment) FIG. 6 shows a front view of a stabilizer bush 41 of another embodiment. This embodiment is characterized in that the cutting portion 29 of the ring portion 26 is connected by an integral hinge 49 in the first embodiment.

In this way, if the cutting portion 29 is connected by the integral hinge 49, the ring portion 2 that becomes a resistance when the stabilizer bush 41 is expanded from the slit portions 7 and 27.
The rigidity of No. 6 can be reduced and the circularity of the ring portion 26 can be maintained.

Incidentally, it goes without saying that the second embodiment can be applied to the meat groove 24.

<Operation and Effect of Device> As described above, the present invention is a stabilizer bush having a hard synthetic resin ring portion on the sliding surface of the rubber main body, and the slit portion and the shaft center are substantially symmetrical. This is a configuration in which various measures are taken to reduce the rigidity at the position. Therefore, this stabilizer bush has the effect that it is easier to open than the slit portion, and assembling with the stabilizer bar is easy.

[Brief description of drawings]

1 to 6 show a stabilizer bush according to an embodiment of the present invention, FIG. 1 is a perspective view of the first embodiment, and FIG. 2 is a state in which it is expanded from a slit for assembling with a stabilizer bar. FIG. 3 is a front view showing a detent groove, FIGS. 4 and 5 are front views of the second embodiment, FIG. 6 is a front view of the third embodiment, and FIG. 7 is a conventional example. 8 is a perspective view of the stabilizer bush of FIG.
Similarly, FIG. 9 is a sectional view showing an assembling state, and FIG. 9 is a sectional view showing a state in which the same is expanded from the slit for assembling with the stabilizer bar. 1,21,31,41 ... Stabilizer bush, 7,27 ... Cleaving section, 11 ... Stabilizer bar, 22 ... Rubber main body section, 24,34 ... Meat slimming section, 26 ... Ring section, 29 ... Cutting part, 49 ... Integral hinge.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Mamoru Tomita 1 Ochiai, Nagachibata, Ochiai, Kasuga-mura, Nishikasugai-gun, Aichi Prefecture (56) References: 61-134411 (JP, U) 62-83709 (JP, U) Actually developed 62-19410 (JP, U)

Claims (1)

[Scope of utility model registration request] Claims: 1. A rubber vehicle stabilizer bush having the following requirements, (a) a cylindrical rubber body having a sliding surface provided with a hard synthetic resin ring portion, (A) In order to fit the stabilizer bar from the outer peripheral direction of the stabilizer bush, an axial slit is formed so as to communicate with the rubber main body portion and the ring portion. (C) The stabilizer bush In order to release the meat deformation in the rubber main body portion when the rubber is expanded from the slit portion, the rubber main body portion is formed with a meat-thin groove that is substantially symmetrical with respect to the slit portion. (D) The ring portion is provided with an integral hinge that is substantially symmetrically divided or substantially symmetrical with respect to the slit portion with respect to the axial center.