JPS6344982B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bush-type anti-vibration support device that is installed in connecting parts of various equipment that are subject to a lot of vibration, such as around the engine mount and suspension of an automobile, and a method for manufacturing the same.

Conventionally, the one shown in FIG. 1 has been widely used as such a vibration isolation support device. This anti-vibration support device is composed of an outer cylinder A, an inner cylinder B, and an elastic body C such as rubber that connects these outer and inner cylinders A and B. The inner cylinder AB and the elastic body C are usually fixed by baking adhesive. Further, a pair of upper and lower spaces D are formed in the above-mentioned elastic body C in the axial direction. This anti-vibration support device has an inner tube B fitted with a shaft of one piece of equipment to be connected (not shown), an outer cylinder A fixed to the other piece of equipment via a holder E, etc., and the space D is vertically connected. It is installed and used as follows.

According to this vibration isolating support device, in the case of small amplitude vibrations, the vibration isolating function is exerted by shearing deformation of the elastic bodies C on both sides against vertical vibrations that are a particular problem in vehicles such as automobiles. In the case of large-width vibration, the upper and lower elastic bodies C in the space D abut against each other and are compressed and deformed, thereby regulating the amplitude and achieving the non-linear characteristics required for a vibration-proof support device. .

However, the vibration damping force of the vibration isolating support device is uniquely determined by the inherent characteristics of the elastic body C, that is, the spring constant, damping coefficient, and precompression when the elastic body C is assembled. The actual situation is that further improvement of the vibration damping effect cannot be expected due to the vibration characteristics.

The present invention focuses on such conventional problems and provides a bush-type vibration isolator with even better vibration-isolating and damping characteristics, and also makes it possible to advantageously obtain this bush-type vibration-isolating support device in terms of production. A manufacturing method is provided. Examples thereof will be described below in detail with reference to the drawings.

Figures 2 and 3 show a vibration isolating support device obtained by the method of the present invention. and fixed with an elastic body 4, and the plurality of spaces 3 are attached to the elastic body 4.
A pair of supports 7 with a sealing material made of an elastic material, for example, a diaphragm 6 formed integrally with one end of the elastic body 4 and with the other end open, forming an orifice 5 communicating with the space 3. ,7
and cylindrical inner and outer holders 8 and 9 for holding these supports 7 and 7, and the space 3 is filled and sealed with a liquid 10. A sealing member 11 is integrally molded on the end surfaces of the inner and outer cylinders 1 and 2 on the open end sides of the supports 7 and 7, and the sealing member 11 seals the abutting portion between the supports 7 and 7. has been secured. In this embodiment, both supports 7,
A semicircular groove is formed in at least one of the abutting end surfaces of the elastic body 4 of 7, so that an orifice 5 is formed by the groove in the assembled state. Orifices may be formed independently in the elastic bodies 4 of 7, 7, or pipe-shaped metal tubes or the like may be fixed thereto. The outer diameter of the aforementioned internal holder 8 is set to be slightly larger than the inner diameter of the inner tube 1 of the support body 7, and the inner diameter of the outer holder 9 is set to be slightly smaller than the outer diameter of the outer tube 2 of the support body 7.
These outer and inner cylinders 2 and 1 and outer and inner holders 9,
By press fitting and interference fitting with 8, both supports 7, 7 are firmly held and the abutting portions of both supports 7, 7 are reliably sealed.

Regarding the manufacture of this anti-vibration support device, the above-mentioned pair of supports 7, 7, internal holder 8, and external holder 9 are prepared in advance, and these supports 7 and internal/external holders 8, 9 are attached (not shown). immerse it in a designated liquid bath. Then, as shown in FIG.
7 with the external holder 9 in between, the open end sides of the space 3 are aligned, and the spaces of the left and right supports are aligned, and both supports 7 are placed in the external holder 9 in a liquid tank.
By gently press-fitting and tightly fitting the internal holder 8 into the inner cylinder 1, the abutting portions of both supports 7, 7 are completely sealed, and the liquid 10 is kept in the space 3. It is possible to obtain a vibration-proof support device that is filled and sealed.

Instead of additionally molding the sealing material 11 at the abutting portion of both supports 7, 7 as described above, an O-ring 12 may be interposed as shown in FIG. In addition, as shown in FIG. 7, inner and outer holders 8 and 9 are also provided.
The end portion 8 is made slightly longer after the support is assembled.
By bending a and 9a, assembly can be made more secure.

FIG. 8 shows a case where the supports 7, 7 are assembled without using the inner and outer holders 8, 9, and in this embodiment, the abutting ends of the inner cylinder 1 and the outer cylinder 2 of both the supports 7 are shown. Step portions 1a ₁ , 1a ₂ , 2a ₁ , and 2a ₂ are formed in the inner cylinder 1 and outer cylinder 2, and these steps are tightly fitted to each other, that is, the outer cylinders 1a 2 and 2a 2 of the inner cylinder ₁ and the outer cylinder ₂ are By making the diameter slightly larger than the inner diameter of the stepped portions 1a ₁ .2a ₁ of the other inner cylinder 1 and outer cylinder 2, both supports 7 are joined by interference fit in the liquid tank as described above. ,
Inside. Liquid 10 can be filled inside without using external holders 8 and 9. A sealed anti-vibration support device can be obtained.

The bush-type vibration isolator thus obtained has an internal holder 8, for example, as shown in FIG.
The shaft 13 on one equipment side is inserted into the other equipment, and the external holder 9 is supported by the other equipment and interposed between the two equipment, and the sealing parts for the liquid 10 are arranged in a vertical relationship, and the diaphragms 6 on both sides are inserted. It is used with a stopper plate 14 placed on the outside with a predetermined gap.

In this vibration isolating support device, in the case of vertical vibration, in the case of high frequency vibration, the volume of the upper and lower liquid filling portions tends to change due to shear deformation of the elastic body 4; The diaphragms 6 on both sides expand and contract faster than the liquid passes through the orifice 5 to absorb the change in volume, and during such high-frequency vibrations, only shearing deformation occurs in the elastic body 4, so the spring constant is small and the vibration damping effect is excellent. can. In addition, in the case of low frequency vibration, the shearing deformation of the elastic body 4 becomes large and the expansion of the diaphragm 6 is suppressed by the stopper plate 14, so that the internal pressure increases, and as a result, the upper and lower liquids 10 are move through. Therefore, this low frequency vibration is significantly attenuated by the resistance of liquid passing through the orifice, and an excellent vibration damping effect can be exhibited here.

Incidentally, the above-mentioned gap between the diaphragm 6 and the stopper plate 14 can also be secured by integrally molding a protrusion 6a on the outer surface of the diaphragm 6, as shown in FIG.

As described above, according to the present invention, external. Inner cylinder and outer. An elastic body that connects the inner cylinders with a plurality of spaces left between them, a sealing material made of the elastic body that closes one of the spaces, and an orifice that penetrates the elastic body and communicates the plurality of spaces. The two supports are connected by interference fitting with the open sides of their spaces facing each other and aligned, and the space is filled with liquid and sealed, so that high frequency In response to vibrations, the sealing material expands and deforms faster than the liquid passes through the orifice, absorbing changes in the volume of the space and damping vibrations.However, in the case of low-frequency vibrations, the sealing material's deformation limit reduces the internal pressure of the space. The liquid rises and the liquid passes through the orifice, thereby damping vibrations, thereby making it possible to improve both the vibration damping characteristics and the vibration damping characteristics. In addition, both of the above-mentioned supports are tightly fitted together in a liquid tank with the open sides of their spaces facing each other and aligned, thereby filling the inside with liquid and sealing it, resulting in vibration-proofing and vibration-damping properties. This has a great practical effect in that it is possible to obtain an excellent liquid-filled bush type vibration-proof support device advantageously in terms of production.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a commonly used vibration isolating support device, FIG. 2 is a sectional view of a vibration isolating support device obtained by the method of the present invention, FIG. 3 is a partially cutaway perspective view of the same, and FIG. FIG. 4 is a partially cutaway perspective view of one of the supports, FIG. 5 is a sectional view showing the method of the present invention, and Nos. 6, 7, and 8.
The figures are cross-sectional views showing different examples of the vibration-proof support device obtained by the method of the present invention, and FIGS. 9 and 10 are cross-sectional views showing the usage state of the vibration-proof support device. 1... Inner cylinder, 2... Outer cylinder, 3... Space, 4...
Elastic body, 5... Orifice, 6... Sealing material (diaphragm) made of elastic body, 7... Support body, 8...
...Internal holder, 9...External holder, 10...
liquid.

Claims (1)

[Scope of Claims] 1. An inner cylinder and an outer cylinder are fixed together with an elastic body leaving a plurality of spaces between the inner and outer cylinders, and an orifice is provided to communicate the plurality of spaces in the elastic body, and
A plurality of supports are prepared in which a sealing material made of an elastic body that closes the space is formed on one end of the elastic body, and these supports are immersed in a liquid bath so that the open sides of the space are facing each other.・Align and connect with tight fit, butt the edges of each support on the open side of the space and bring them into close contact.
A method for manufacturing a bush-type vibration-proof support device, characterized in that the space is filled with liquid and sealed tightly before being assembled. 2 The inner cylinder and the outer cylinder are fixed together with an elastic body leaving a plurality of spaces between the inner and outer cylinders, and an orifice is provided in the elastic body to communicate the plurality of spaces, and one of the elastic bodies is provided with an orifice that communicates the plurality of spaces. A plurality of supports are provided with a sealing material made of an elastic material formed at the end to close the space, and these supports face each other with the open sides of the spaces aligned and are tightly fitted together to close the open sides. A bush type vibration isolating support device characterized in that the edges of the bushings are abutted and brought into close contact with each other, and the space is filled with liquid and sealed.