JPH0658496U - Viscous body filled damper - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a viscous body-filled damper which is easy to manufacture and has excellent vibration absorbing ability in the direction perpendicular to the axis. [Structure] A lid portion having a stirring shaft portion, a bottom made of a hard material facing the stirring shaft portion, and a side wall portion formed from a rubber material, a soft resin or the like formed between the lid portion and the bottom portion. In a viscous body-filled damper formed by filling a viscous body into at least a part of the inside of a container to be constructed, the viscous body is filled in the viscous body receiving portion, and the stirring shaft portion is projected. Moreover, the side wall part is a viscous body-filled damper whose shape is easily deformed in the axial direction.

Description

[Detailed description of the device] [Prior art and its problems]

[0001]

[Industrial applications]

 The present invention relates to a viscous material-filled damper having a vibration damping function in which a viscous material is filled in all or part of the inside of a container.

[0002]

[Prior art and its problems]

 In various audio equipment such as video tape recorders or various precision measuring equipment, when vibration is transmitted from the outside and input, it will affect the performance of those equipment. If vibration is applied to an audio device such as a CD player, so-called sound skipping and other inconveniences occur. Therefore, it is necessary to sufficiently take anti-vibration measures such as the above-mentioned acoustic equipment or precision measuring equipment that are extremely vulnerable to vibration, and techniques have been proposed to prevent external vibration from being input. As one of the techniques, a so-called viscous liquid-sealed damper in which a viscous liquid such as silicone oil is sealed in a rubber container is known. This viscous liquid-filled damper is relatively widely used because it has a relatively simple structure and has a proper vibration damping capacity.

[0003] This viscous liquid-filled damper has its performance deteriorated when air bubbles are mixed into the viscous liquid. Therefore, it is usually manufactured by the following method in order to prevent air from being mixed. That is, for example, as shown in FIG. 4, the viscous liquid is sufficiently poured into the concave portion of the rubber container (9) having the concave portion (92) for accommodating the viscous liquid (91) (FIG. 4-a). Then, the lid (8) is overlaid and adhered while paying sufficient attention not to introduce air bubbles into the viscous liquid (Fig. 4-b). In this case, it has been pointed out that when the lid is adhered, an excessive amount of viscous liquid overflows to the adhered portion of the lid, and the lid is hard to adhere strongly. In addition, even with a viscous liquid-filled damper that was once made, liquid could leak from the damper-fixed portion or thin-walled portion with the passage of time, and the vibration absorption capacity could decline.

The present applicant has already developed a vibration absorbing material that solves the above problems. Although the vibration absorbing material is excellent in vibration absorbing ability, it is desired to improve the absorbing ability of the vibration applied in the direction perpendicular to the axis.

[0005]

[The purpose of the device]

 Therefore, the present invention is to provide a vibration absorber in which the above-mentioned points are eliminated. That is, it is an object of the present invention to provide a damper that is simple in manufacturing method, has no defects such as poor adhesion due to viscous liquid, and has excellent vibration absorption capability with improved absorption capability of vibration applied in the direction perpendicular to the axis. Is.

[0006]

[Means for achieving the purpose]

 The present invention has been proposed to achieve the above-mentioned object, and employs a viscous material such as a gel-like material instead of the liquid filled in the container, provides a space inside the container, and provides a bottom portion. It is based on the knowledge that a damper having an improved manufacturing method and vibration damping ability can be obtained by providing the viscous body receiver to the. That is, according to the present invention, a viscous body is filled in all or part of the inside of a container that is composed of at least a lid part having a stirring shaft part made of hard resin and a bottom part facing the stirring shaft part. In the viscous body-filled damper described above, the viscous body-filled damper is characterized in that the agitation shaft portion is projected into the viscous body in the container, and the bottom portion is provided with the viscous body receiving portion. .

[0007]

[Specific explanation of the device]

Hereinafter, the present invention will be specifically described with reference to FIG. 1 showing an example of a viscous material-filled damper. The viscous body-filled damper container ( 1 ) of the present invention comprises at least a lid part (12) having a stirring shaft part (11) and a bottom part (14) having a viscous material receiving part (13). . Moreover, the side wall part (15) may be further formed. At least a part of the viscous body (2) is filled in the viscous body receiving section (13) at the bottom. If necessary, a coil spring (5) may be used together for vibration-proof support. Further, the bottom portion of the damper is fixed to the supported member (4), and the lid portion of the damper is fixed to the fixing member (not shown). The supported member is not always held by the lid, but may be held by the bottom in some cases.

[0008]

[Action]

 An example of using the viscous damper of the present invention will be specifically described. An example of holding a CD player using the damper will be described with reference to FIG. 5, which is a cross-sectional view of a main part. The CD disk plate (62), optical system (not shown), motor (63) The support (61) of the constructed CD player is held by the bottom of the viscous body-filled damper. The viscous damper is fixed to the support member (7) at the lid and bottom of the damper. Even if the support member shakes due to vibration of the automobile, for example, the vibration of the support member is almost absorbed by the action of the container and the viscous body of the viscous damper.

That is, when vibration in the stirring axis direction is applied to the viscous body-filled damper, the viscous body in the container and the air in the space are compressed, and if the side wall is formed, the side wall is also deformed. . When the spring coil is also used, the spring coil is also compressed and the applied vibration is absorbed. Also, when vibration is applied to the stirring shaft at right angles, the rigidity of the stirring shaft and the viscous body receiving part is high, so the stirring shaft moves in the viscous body relative to the bottom of the container and is applied. Vibrations are absorbed.

The viscous material used in the present invention means a viscous material represented by a gel-like material. The gel substance is preferably silicone gel or polyurethane gel. Preferable examples of the silicone gel include those obtained by heating and curing a mixture of polyorganosiloxane, a curing agent, a curing accelerator and the like. A preferred example of the polyurethane gel is a gel-like substance obtained by reacting an ordinary polyol, a polyisocyanate and a conventional compounding agent together. In addition, it is possible to obtain more excellent effects by adding a conventional compounding agent such as a filler to these gel substances. These gel substances are appropriately selected from those having a penetration (JIS K2530) of 30 to 800 depending on the weight of the supported body. For example, when the weight of the supported body is 100 gf, It is desirable to select a grade of 200 to 400. The use of a gel-like substance out of this range not only makes it impossible to obtain a damper having favorable damping characteristics, but also makes it impossible to obtain a durable damper.

It is advantageous to use a hard resin or a rubber harder than the side wall portion for the lid portion of the container. Specific examples thereof include vinyl chloride resin, polyamide, polycarbonate, acrylonitrile resin, butadiene-styrene resin, and polyacetal.

The bottom of the container may be made of any material as long as it can be used as a viscous material-filled damper, but it is particularly advantageous to use a hard resin or a rubber harder than the side wall. . The bottom portion is provided with a viscous body receiving portion. It is preferable that the viscous receiving portion is also made of the same material as the bottom portion. When the viscous body receiving portion is made of a hard material and the agitating shaft portion is also made of a hard material, both of them have high rigidity. Therefore, when vibration is applied to the damper, Since the relative displacement with respect to the bottom is obtained, it provides excellent vibration absorption.

A soft material such as soft resin or rubber is used for the side wall of the container. Specific examples thereof include butyl rubber and silicone rubber. Further, it is important that the side wall has a shape that is easily deformed in the axial direction. Examples of such a shape include a bellows shape, a bellows shape, or a trapezoidal shape. With this structure, a spring constant is low, the resonance frequency is lowered, and an excellent vibration absorber is obtained.

The damper of the present invention is preferably integrally combined with the lid portion, the bottom portion, and the side wall portion. The integral combination here means that the lid portion, the side wall portion, and the bottom portion are firmly fixed to each other. This fixing means is not particularly limited as long as it is fixed to the extent that it can function as a viscous damper, but in addition to the case where it is obtained by the integral molding method, mechanical means such as fitting or The use of chemical means such as the use of an adhesive can be exemplified.

The damper of the present invention is manufactured by the following procedure, for example. That is, a bottom portion having a viscous body receiving portion (thickness: 1 mm) made of polyamide is prepared. A predetermined amount of the silicone composition is injected into the viscous body receiving portion. The composition is heat-treated to gel the silicone composition. On the other hand, a molded body obtained by fixing a polyamide lid portion having a stirring shaft portion formed thereon and an olefin elastomer side wall portion is prepared. The stirring shaft portion was made to penetrate into the gel and the side wall portion was fixed to the viscous body receiving portion to obtain a viscous body-filled damper. Instead of injecting the silicone composition and curing it by heating to prepare the gel, it is also possible to use a previously prepared silicone gel having a predetermined shape.

Further, in a different preferable viscous body-filled damper of the present invention shown in FIG. 2, the lid part forms a part of the supported member, but in this damper, vibration absorption capacity is improved. In addition to being excellent, the supported member directly forms part of the damper, making it an economical damper with a low manufacturing cost.

[0017]

[Effect of device]

The damper of the present invention is an excellent vibration absorbing material that can sufficiently absorb the applied vibration. In particular, since the point where the space is formed inside the damper or the side wall is configured to be easily deformed in the axial direction, it is excellent in absorbing vibration in the axial direction, and the spring constant of the damper is reduced, resulting in resonance. As the frequency (f _O ) becomes lower, the moving amount of the viscous body becomes larger, and the resonance magnification (Q value) is lowered. Further, when the stirring shaft portion and the viscous body receiving portion are made of a hard resin, the vibration absorbing ability in the direction perpendicular to the axis is also excellent, and a more preferable vibration absorbing material was obtained. Furthermore, by providing a slit-shaped communication port between the side wall portion and the viscous body receiving portion and forming a hole through which air escapes outside, the spring constant can be further reduced. In addition, the viscous material-filled damper of the present invention has an effect that the viscous material-filled damper of the present invention is simpler to manufacture, and that the vibration absorbing ability is less deteriorated due to aging compared with the oil damper that has been widely used. . Therefore, by using the damper of the present invention, even when a CD player or the like is mounted on a vehicle, the vibration transmitted to the device can be made extremely weak, causing a problem such as so-called skipping. The points can now be resolved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an example of a viscous damper according to the present invention.

FIG. 2 is a cross-sectional view of an example of a different viscous damper according to the present invention.

FIG. 3 is a cross-sectional view of an example of supporting a CD damper using the viscous damper of the present invention.

FIG. 4 is a sectional view (a) showing a conventional oil damper and a sectional view (b) of the conventional oil damper during a manufacturing process.

[Explanation of Codes] 1 Viscous body-filled damper container 2 Viscous body 4 Supported member 5 Spring coil 7 Fixing member 8 Oil damper lid 9 Oil damper container 11 Stirring shaft portion 12 Lid portion 13 Viscous body receiving portion 14 Bottom portion 15 Side wall 61 Supporting tool 62 CD disk plate 63 Motor 91 Viscous liquid 92 Recessed part of oil damper container

Claims (1)

[Scope of utility model registration request] 1. A viscous body is filled in all or part of an inside of a container at least composed of a lid portion having a stirring shaft portion formed of a hard resin and a bottom portion facing the stirring shaft portion. In the viscous body-filled damper, the agitation shaft portion is projected into the viscous body in the container, and the bottom portion is provided with a viscous body receiving portion.