JPH0658495U - Viscous body filled damper - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a viscous body-filled damper which is easy to manufacture and has a vibration damping capacity which is equal to or higher than that of an oil damper. [Structure] A viscous body is filled in a part of an inside of a container including a lid portion having a stirring shaft portion, a bottom portion facing the stirring shaft portion, and a side wall portion between the lid portion and the bottom portion. In the viscous body-filled damper having the remaining space, the viscous body has the agitation shaft portion projecting into the viscous body, and the space in the container communicates with the outside of the container.

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 at least a part of the inside of a container is filled with a viscous material.

[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 has a bad influence on the performance of the equipment. If vibration is applied to an audio device such as a CD player installed in a car, the inconvenience such as skipping of sound will occur. Therefore, it is necessary to adequately take anti-vibration measures for the above-mentioned acoustic equipment or precision measuring equipment that are extremely vulnerable to vibration, and various technologies have been proposed that 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-sealed damper deteriorates its performance when air bubbles are mixed into the viscous liquid. Therefore, it is usually manufactured through the following steps 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 bonded, an excessive amount of viscous liquid overflows into the bonded portion of the lid, the workability is poor, and the lid is hard to be strongly bonded. 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 has excellent vibration absorbing ability, there still remains a problem that the price for manufacturing the damper cannot be said to be sufficiently low.

[0005]

[The purpose of the device]

 Therefore, the present invention is to provide a vibration absorbing material in which the above-mentioned problems are solved, and there is no defect such as adhesion failure due to viscous liquid, and the vibration absorbing material is equal to or more than a conventional viscous liquid damper. The purpose of the present invention is to provide a highly efficient damper that is easy to manufacture, inexpensive, and economical.

[0006]

[Means for achieving the purpose]

 The present invention has been proposed in order 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, and provides a space inside the container. It is based on the finding that a manufacturing method and a damper with improved vibration damping capability can be obtained by using a soft material for the side wall of the. That is, according to the present invention, a container including a lid portion having a stirring shaft portion formed of a hard resin, a bottom portion facing the stirring shaft portion, and a side wall portion between the lid portion and the bottom portion is provided. In a viscous body-filled damper in which at least a part of the inside is filled with a viscous body, the agitation shaft portion is projected into the viscous body in the container, and the side wall portion is made of a soft material. A viscous body-filled damper is provided.

[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 a lid part (2) having a stirring shaft part (21), a bottom part (3) and a side wall part (4). If necessary, a coil spring (5) may also be used in combination for vibration-proof support. It is particularly preferable that the lid portion and the bottom portion are made of a hard resin, and the side wall portion is made of a soft material such as a rubber elastic body or a soft resin. Further, although the viscous body (11) is filled in the container, it is possible to bring about a more preferable effect by providing a part of the space (12) without filling the whole of the container. It will be possible.

[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. Further, when the spring coil is also used, the spring coil is also compressed and the applied vibration is absorbed. Further, when vibration is applied to the stirring shaft in a direction perpendicular to the stirring shaft, the stirring shaft mainly moves relative to the bottom of the container in the viscous body, and the applied vibration is 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. It should be noted that the addition of a conventional compounding agent such as a filler or a plasticizer to these gel-like substances can bring about more excellent effects. 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 important to use hard resin or rubber that is harder than the side wall for the lid of the container. Specific examples thereof include vinyl chloride resin, polyamide, polycarbonate, acrylonitrile resin, butadiene-styrene resin, and polyacetal. It is important to use hard resin or rubber that is harder than the side wall for the bottom of the container.

A soft resin or a rubber material is used for the side wall portion inside the container. Specific examples include butyl rubber and silicone rubber.

It is preferable that an air communication hole that connects the space inside the container and the outside of the container is formed in the lid. By forming the air communication hole, the spring constant of the damper can be reduced and the resonance frequency can be reduced.

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. In the present invention, when a soft resin is used for the side wall part, the side wall part and the bottom part or the side wall part and the lid part are manufactured by, for example, an insert molding method or a two-color molding method to easily manufacture an integrally molded product. can do. Also, when a rubber material is used as the side wall portion, a side wall portion that employs a so-called baking method is firmly fixed and can be easily manufactured. The fixing means other than the above 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 adopting a known molding method, mechanical means such as fitting is used. The use of various means and chemical means such as the use of adhesives can be exemplified.

The damper of the present invention is manufactured by the following procedure, for example. That is, an integrally molded product is manufactured by an injection molding method using a molded product that constitutes a bottom portion made of polyamide and a polyolefin elastomer. Then, a predetermined amount of the silicone composition is injected into the side wall of the molded body. Furthermore, this silicone composition was heat-treated and gelled, and then a polyamide lid having a stirring shaft was formed and fixed to the side wall 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 another preferable viscous body-filled damper of the present invention shown in FIG. 2, the bottom part forms a part of the supported member, but in this damper, the spring constant is low. As a result, the resonance frequency (f _O ) decreases, the amount of movement of the viscous body increases, and the resonance magnification (Q value) decreases, and the supported member directly forms part of the damper. It is a cheaper and more economical damper that is cheaper to manufacture.

[0017]

[Effect of device]

The damper of the present invention can sufficiently absorb the applied vibration by the action of both the viscous body and the air in the space. In particular, if the damper space is increased or the air communication hole is formed, the spring constant of the damper is lowered, the resonance frequency (f _O ) is lowered, and the movement amount of the viscous body is increased to increase the resonance magnification ( This brings about a decrease in the Q value), and a more preferable vibration absorbing material was obtained. 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. . Moreover, since the price of the damper is extremely low, it is economically advantageous. Therefore, according to the present invention, even when a CD player or the like is mounted on an automobile or the like, the vibration transmitted to the device is extremely weak, and a useful vibration absorbing material that solves problems such as so-called sound skip It was done.

[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 reference numerals] 1 container of viscous body-filled damper 2 lid part 3 bottom part 4 side wall part 5 spring coil 7 fixing member 8 oil damper lid 9 oil damper container 11 viscous body 12 space part 21 stirring shaft part 61 support 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. An inside of a container comprising a lid portion having a stirring shaft portion formed of a hard resin, a bottom portion facing the stirring shaft portion, and a side wall portion between the lid portion and the bottom portion. In a viscous body-filled damper at least a part of which is filled with a viscous body, the stirring shaft portion is projected into the viscous body in the container, and the side wall portion is formed of a soft material. Viscous body filled damper.