JPH0811972B2 - Rubber device to prevent abnormal noise - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormal noise preventing rubber device capable of preventing the generation of annoying abnormal noise that occurs when excessive pressure is applied in a vibration-proof structure using rubber. Is.

[0002]

2. Description of the Related Art An anti-vibration structure using anti-vibration rubber is constructed, for example, as follows. That is, the mounting portion (the outer peripheral surface is painted) of the mounting bracket is press-fitted into a hole provided in the vibration-proof rubber, and the vibration-proof structure is provided by providing a flange portion on the rubber bush. Has been done.

[0003]

In such a vibration-proof structure, when an abnormal force is applied, the force is applied to a metal fitting having a synthetic resin paint film formed by electrodeposition coating or the like to prevent rust, and The rubber is slipped into the metal fittings due to the pressure applied between the rubber and the metal fittings, causing abnormal noise. (The frequency of this noise when water enters between the rubber and metal fittings during rainy weather, etc.) Is particularly increased).

The present invention has been made in view of the above circumstances, and in the above-described vibration-proof structure or the like, an abnormal noise preventing rubber device capable of preventing the occurrence of abnormal noise due to a staple slip or the like. The purpose is to provide.

[0005]

In order to achieve the above object, a rubber device for preventing abnormal noise of the present invention comprises a rubber main body having vibration damping performance, and a support body which is pressed against the rubber main body. A coating film of synthetic resin paint containing hard microspheres for preventing abnormal noise is dispersedly formed on the pressure contact interface of the rubber body.

That is, in the abnormal noise preventing rubber device of the present invention, the hard microspheres for the abnormal noise suppressing material are dispersed and contained in the pressure contact interface between the rubber main body having vibration damping performance and the support body in pressure contact with the rubber main body. Since the coating film of the synthetic resin coating is formed, it is possible to form irregularities on the coating film surface and reduce the contact area between the support and the rubber body. In addition, as compared with the previous proposal, in which the rubber part of the anti-vibration rubber has irregularities on the surface, the fine spherical particles dispersed and contained in the coating film are hard, so the irregularities are retained over a long period of time. can do. Therefore, the occurrence of status slips is suppressed over a long period of time, and a sufficient effect of preventing abnormal noise is obtained. Since the above-mentioned hard fine spherical body is fine, the work of coating it on the support or the rubber body is as easy as coating conventional paint.

Next, the present invention will be described in detail.

The material of the rubber main body used in the present invention is not particularly limited, and conventionally known rubber materials are used.

Further, the synthetic resin used in the synthetic resin coating material used in the present invention is not particularly limited, and conventionally known ones can be mentioned. Among them, fluorine resin and metal are used from the viewpoint of reducing the friction coefficient. It is preferable to use an epoxy resin from the viewpoint of adhesiveness with and compatibility with rust preventive paint.

As the fine spherical particles used in the synthetic resin coating material, not only solid particles but hollow particles can be used. And specifically, resin beads, glass beads,
Examples include hollow fillers. The resin used for the resin beads is not particularly limited as long as it has good compatibility with the paint and is not damaged, but it is preferable to use an acrylic resin. The size of the beads is set to 10 μm or more, preferably 30 to 100 μm. The amount of beads mixed is set within the range of 10 to 70% by volume (hereinafter abbreviated as “%”) with respect to the coating material containing the synthetic resin as a main component, and preferably 30 to
It is set within the range of 60%. That is, when the amount of beads mixed is less than 10%, the surface roughness becomes small and 70%
This is because when the amount is larger, the adhesion of the beads becomes worse.

The above synthetic resin paint is a fluorine resin paint,
It can be obtained by dispersing hard microspheres such as resin beads in a coating material such as an epoxy resin coating material.

The coating material thus obtained is applied to at least one of the pressure-contact surfaces of the support such as a metal fitting and the rubber body in the same manner as in the prior art to form a coating film, and then both are assembled. The rubber device for preventing abnormal noise assembled in this manner is such that during use, the coating film is removed due to abrasion so that the hard microspheres such as resin beads are exposed. And the support such as the metal fitting come into contact with each other. Therefore, the occurrence of status slip is suppressed and the occurrence of abnormal noise is eliminated over a long period of time.

[0013]

As described above, according to the rubber device for preventing abnormal noise of the present invention, it is possible to form irregularities on the pressure-contact interface between the rubber main body having the vibration-proof performance and the support body pressed against the rubber main body. The contact area between the support and the rubber body can be reduced. In addition, as compared with the previous proposal, in which the rubber part of the anti-vibration rubber has irregularities on the surface, the fine spherical particles dispersed and contained in the coating film are hard, so the irregularities are retained over a long period of time. can do. Therefore, the occurrence of status slips is suppressed over a long period of time, and a sufficient effect of preventing abnormal noise is obtained. Since the above-mentioned hard fine spherical body is fine, the work of coating it on the support or the rubber body is as easy as coating conventional paint.

Next, examples will be described together with comparative examples.

[0015]

1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a sectional view thereof. In the figure, reference numeral 1 is a stabilizer bush, which is fixed to a support base 4 using a bracket 3. Reference numeral 2 is a metal bar, the outer peripheral surface of which is electrodeposited by a conventionally known method. In this embodiment, the following synthetic resin paint is further applied to the outer peripheral surface (see FIG. 3). That is, this synthetic resin paint 5 is a fluorine resin-based paint (composition fluorine resin varnish: 65%, solvent such as MIBK: 27%, isocyanate: 4%, surface conditioner: 2%, precipitation inhibitor: 2%). To
It is produced by mixing 10% of acrylic resin beads 6. After the application, it is dried at 80 to 100 ° C. for 10 to 20 minutes to be in a DRY state, whereby irregularities can be formed on the outer peripheral surface of the bar 2. The bar 2 in the DRY state is press-fitted into the mounting hole 1a of the stabilizer bush 1 to form a vibration-proof structure.

FIG. 4 shows another embodiment of the present invention. In this embodiment, the synthetic resin paint is applied to the peripheral surface of the mounting hole 11a of the painted metal arm 11, and then the DRY state is obtained in the same manner as above. Then, a rubber bush with an inner cylinder (made by vulcanizing and adhering a metal inner cylinder 9 to a cylindrical vibration-proof rubber 8) 7 is press-fitted into the mounting hole 11a, and a bolt 10 and a nut 12a are used in this rubber bush to provide a bracket 10. Is attached to form a vibration-proof structure.

FIG. 5 shows still another embodiment of the present invention. In this embodiment, the mounting hole 17a of the arm 17 is
Further, a rubber bush with an inner / outer cylinder (a metal inner cylinder 14a, a metal outer cylinder 14b with a flange portion, coating films thereof, a vibration isolator 15 with a flange portion is provided, and the vibration isolator 15 has an outer cylinder 14b.
13 is inserted and the plate-shaped mounting portion 16a of the plate-shaped supported body 16 made of metal is mounted on the inner cylinder 14a using bolts 18 and nuts 19 to form a vibration-proof structure. There is. The plate-shaped mounting portion 16a is coated with the synthetic resin coating on its pressure contact surface with the rubber, and is in a DRY state in the same manner as above.

FIG. 6 shows still another embodiment of the present invention. In this embodiment, the coated plate-shaped supported body 23
The synthetic resin paint is applied to the lower surface of the plate-like arm 22 for placement, and then the DRY state is obtained in the same manner as above.
Then, the lower surface of the plate-like arm 22 is supported by a flat plate-shaped anti-vibration rubber (consisting of only a rubber body) 20 fixed to the support plate 21 with an adhesive to form an anti-vibration structure.

In the above embodiment, the outer peripheral surface of the bar 2 is
A coating film of synthetic resin paint is formed on the peripheral surface of the mounting hole 11a of the arm 11, the peripheral surface of the plate-shaped mounting portion 16a, the lower surface of the plate-shaped arm 22, and the like, but the invention is not limited to this. ,
The above-mentioned coating is applied to the peripheral surface of the mounting hole 1a of the stabilizer bush 1, the outer peripheral surface of the vibration isolating rubber 8 of the rubber bush 7, the side surface of the flange portion of the antivibration rubber 15 of the rubber bush 13, the upper surface of the antivibration rubber 20, and the like of the rubber body. A film may be formed.

As shown in FIG. 1, an experiment was carried out as follows in a vibration-proof structure in which a bar 2 was attached to a stabilizer bush 1 for vibration-proof support.

[0021]

[Example A] In the example shown in FIG.
1 (in the case of the embodiment shown in FIG. 1 itself) and the bar 2 which is in a WET state by spraying water on the contact surface are press-fitted into the mounting holes 1a of the stabilizer bush 1 to determine whether or not abnormal noise is generated. The effect on spring properties was measured.

[0022]

Example B The amount of acrylic resin beads mixed was changed to 70%. Other than that was measured like Example A.

[0023]

[Example C] Instead of the fluorine resin-based paint, an epoxy resin-based paint (composition: epoxy resin varnish: 16%, solvent such as toluene: 70.4%, extender pigment: 10%, carbon black: 3%, surface adjustment) Agent: 0.1%, precipitation inhibitor: 0.
5%) was used. Other than that was measured like Example A.

[0024]

[Comparative Example A] A stabilizer bush and a bar having an outer peripheral surface electrodeposited by a conventionally known method were prepared, and the bar was press-fitted into a mounting hole of the stabilizer bush, and measurement was performed for each of the above items.

[0025]

[Comparative Example B] A stabilizer bush and a bar whose outer peripheral surface was electrodeposited by a conventionally known method were prepared, and a fluorine resin-based paint was applied to the outer peripheral surface of the bar. Other than that was measured like Example A.

[0026]

[Comparative Example C] Instead of the fluorine resin-based paint of Comparative Example B, an epoxy resin-based paint was used. Other than that was measured like Comparative Example B.

[0027]

Comparative Example D Silicone oil was used in place of the fluorine resin-based paint of Comparative Example B. Other than that was measured like Comparative Example B.

[0028]

[Comparative Example E] A stabilizer bush having irregularities formed on the peripheral surface of the mounting hole and a bar electrodeposited on the outer peripheral surface by a conventionally known method were prepared, and the bar was press-fitted into the mounting hole of the stabilizer bush. Each of the above items was measured.

The results are shown in Table 1 below.

[0030]

[Table 1]

As can be seen from Table 1 above, the products A, B, and C of the Examples have no abnormal noise and no influence on the spring characteristics. On the other hand, the comparative products A, B, C and E produce abnormal noise, and the comparative product D has an influence on the spring characteristics.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a bar is pressed into a stabilizer bush.

FIG. 2 is a cross-sectional view showing a state in which a bar is vibration-isolated and supported by a rubber bush.

FIG. 3 is an explanatory view showing a state in which a synthetic resin paint is applied to the outer peripheral surface of the bar.

FIG. 4 is a cross-sectional view showing a state in which a shaft is supported by a rubber bush to prevent vibration.

FIG. 5 is a cross-sectional view showing a state in which a plate-shaped supported body is supported by a rubber bush in a vibration-proof manner.

FIG. 6 is a perspective view showing a state in which a supported object is supported by a flat rubber vibration isolator.

[Explanation of symbols]

 1 Stabilizer bush 1a Mounting hole 2 Bar 5 Synthetic resin paint 6 Resin beads

Claims (3)

[Claims] 1. A rubber main body having anti-vibration performance, and a support body which is brought into pressure contact with the rubber main body, and hard microspheres for abnormal noise preventing material are dispersedly contained in a pressure contact interface between the support body and the rubber main body. A rubber device for preventing abnormal noise, wherein a synthetic resin paint film is formed. 2. The abnormal noise preventing rubber device according to claim 1, wherein the rubber main body is a bush, and the support is an arm that carries a shaft or an outer peripheral surface of the bush that is press-fitted into a mounting hole of the bush. 3. The abnormal noise preventing rubber device according to claim 1, wherein the rubber body is a flat rubber body, and the support body is an arm for supporting the rubber body.