JPH086776B2 - Viscous fluid filled damper - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a viscous fluid-sealed damper in which a viscous fluid is enclosed and which has a vibration damping action based on the viscous flow of the viscous fluid.

(Prior Art) For example, when a CD player is mounted on a vehicle, sound skipping occurs if the vehicle vibration is transmitted to the CD player as it is. To prevent this, a viscous fluid-sealed damper is used to prevent this. Shaking support is performed.

By the way, a conventional viscous fluid-sealed damper includes a container body, a lid body fixed to the container body and closing the opening thereof,
It has a viscous fluid such as highly viscous silicone oil enclosed inside, and is designed to absorb vibration based on the flow resistance of the viscous fluid due to the agitation of the agitation shaft that is thrust inside the viscous fluid. .

(Problems to be solved by the invention) By the way, in the viscous fluid-sealed damper of this aspect, the viscous fluid adheres to the fixing surface between the container body and the lid to hinder the adhesion, or viscous fluid inside the container body. However, there is a problem in that when the lid is fixed, it overflows, and it has been desired to solve the problem.

The viscous fluid-sealed damper of the above-mentioned form is usually assembled by injecting and filling the viscous fluid through the opening of the container body and then fixing the lid body to the container body to close the opening. It adheres to the mating surface (fixed surface) of the container body with the lid, and hinders the sticking.

In addition, when the viscous fluid is poured into and filled in the container body, particularly if the viscous fluid is a starch syrup-like material that is extremely hard to flow, even if it is pre-measured and filled according to the inner volume of the container body, The portion is likely to rise to the outside of the opening of the container body, and therefore when the lid is fixed to the container body to close the opening, viscous fluid raised to the outside of the opening is pressed by the lid, or Due to the pushing action based on the deformation of the container body, it flows out to the mating surface between the container body and the lid. As a result, the sticking property between the container body and the lid is hindered, and the viscous fluid in the container body leaks to the outside.

(Means for Solving the Problem) The present invention has been made to solve such problems, and its gist is to provide a container body and a lid body fixed to the container body and closing the opening. , A viscous fluid-sealed damper that includes a viscous fluid sealed in a space formed between them and that is interposed between a supporting member and a supported member, and that has a vibration-proof effect. In the previous free state, the fluid formed in the container body from the opening-side end surface of the container body which becomes a mating surface with the lid body as it goes from the peripheral edge of the opening to the center side of the opening in the container body. It has a form that extends in an inclined state in a direction away from the room,
In the fixed state of the lid body, an annular projecting piece made of an elastic material as a bank piece and a sealing piece that elastically abuts the inner surface of the lid body and elastically deforms to a shape inclining toward the opening center side is provided on the container body. It is provided along the entire circumference along the peripheral edge of the opening.

(Operation and Effect of the Invention) As described above, in the viscous fluid-sealed damper of the present invention, the annular projection protruding from the opening peripheral edge of the container body acts as a seal piece, and the highly viscous mating surface of the container body and the lid body is provided. Prevents fluid from entering. That is, when the high-viscosity fluid is injected and filled into the container body, the annular projecting piece serves as a bank piece to prevent the high-viscosity fluid from adhering to the mating surface of the container body with the lid.

Also, when closing the opening of the container body with the lid, even if the viscous fluid rises outside the opening, or even if the container body deforms and acts to push out the viscous fluid inside, When pressing the body in contact with the tip of the ring-shaped protrusion, the ring-shaped protrusion adheres to the lid and keeps the contact area with the lid in a sealed state, pressing and fixing it to the container body. At this time, the viscous fluid is prevented from flowing out from the same portion. This avoids a decrease in the adhesion force at the mating surface between the container body and the lid, and ensures that they are firmly adhered to each other, and also prevents viscous fluid from leaking from the same part, improving the appearance quality of the product. To do.

Further, in the damper of the present invention, since the above-mentioned annular projecting piece is easily elastically deformed to fall toward the opening center side of the container body when the lid is fixed, the annular projecting piece does not hinder the fixing of the lid at all. Has features.

(Example) Next, an example of the present invention will be described in detail with reference to the drawings.

FIG. 2 shows a CD player mounted on a vehicle and its supporting structure. In the figure, 10 is a supporting frame, and the supporting frame 10 causes the mechanical deck 12 to include a spring 14 and a viscous fluid filled damper 16. It is supported. The mechanical deck 12 includes a turntable 20 that supports and rotates the compact disc 18, a drive unit 22 that rotationally drives the compact disc 18, an optical pickup 26 having a reading unit 24, and a guide unit 28 for moving and guiding the optical pickup 26. It is provided.

The viscous fluid-sealed damper 16 includes a container body 30 made of rubber and a lid made of rubber or resin, as shown in FIG.
32 and the high-viscosity fluid 34 is enclosed in the space formed by them. The lid 32 has an annular groove 40 between the small-diameter flange portion 36 and the large-diameter flange portion 38, and the annular groove 40 is fitted into the mounting hole of the mechanical deck 12 described above.
It is supposed to be fixed.

On the other hand, the container body 30 has an opening at the upper end and a thick flange portion.
42, and the lid 32 is bonded and fixed to the flange 42 so as to close the opening.

The container body 30 has a stirring shaft 43 at the bottom opposite to the opening. The stirring shaft portion 43 is composed of a cylindrical portion 44 with a thin bottom integrally formed in the container body 30, and a mounting bracket 46 fitted in the cylindrical portion 44. The mounting bracket 46 is
It has a female screw hole 50 at its center and a flange 48 at the lower end, and a bolt is screwed into the female screw hole 50 in a state where the flange 48 is in contact with the upper surface of the support frame 10 and fixed to the support frame 10. It is supposed to be done.

A thin annular projecting piece 52 having elasticity is integrally provided on the periphery of the opening of the container body 30. This annular protrusion 52 is
As shown in FIG. 3, in a state before the lid 32 is fixed, the lid 32 has a shape extending from the peripheral portion of the opening toward the center of the opening and toward the outside of the container.

The viscous fluid-sealed damper 16 of the present example, after injecting the viscous fluid 34 into the container body 30, presses and bonds the respective mating surfaces of the container body 30 and the lid 32 to which adhesive has been applied in advance to integrally form them. At the time of assembling, that is, when injecting the viscous fluid 34 into the container body 30, the viscous fluid 34 and the lid 32 are brought into contact with each other by the thin annular projecting piece 52 which rises in an inclined state from the opening peripheral portion of the container body 30. Is prevented from adhering to.

Further, when the lid body 32 is pressed against the container body 30, the viscous fluid 34 partially bulged outward from the opening of the container body 30 flows laterally, but due to the annular projection 52, it has flowed. The viscous fluid 34 is the mating surface (bonding surface) between the container body 30 and the lid 32.
Is prevented from flowing out to. When the viscous fluid 34 flows and the fluid pressure acts on the annular protruding piece 52, the annular protruding piece 52 causes the lid 32 to move.
This is because it is closely adhered to and acts as a seal piece that prevents the viscous fluid 34 from flowing out (see FIG. 4). Thus, if the viscous fluid 34 is prevented from adhering to or flowing out from the mating surface between the container body 30 and the lid 32, the adhesive strength between them is increased, and the fluid is prevented from leaking from the mating surface. The quality reliability of the viscous fluid-sealed damper 16 is improved.

The damper of the present invention can be configured in various forms other than the above example. FIG. 5 shows a specific example thereof. In the damper 53 of this example, the container body 54 is composed of a soft resin (or rubber) first member and a hard resin second member, which are integrally fixed (the resin first member). And the second member can be simultaneously molded by two-color molding). The first member has a stirring shaft portion 58 provided with a hole portion 56 for inserting a shaft body extending from a supporting member or a supported member, a flexible portion 60, and a part of the peripheral wall portion of the container body (inner part). The peripheral wall portion 62) is formed, and the second member is formed with a part of the peripheral wall portion (outer peripheral wall portion 64) and a thick flange 66. A fitting recess 68 is formed on the upper surface side in the drawing of the second member made of hard resin, and a lid body 70 made of hard resin is also fitted therein and fixed. The container body 54 and the lid 70 can be fixed to each other by welding the resins together.

On the other hand, the first member made of a soft resin is provided with an annular projecting piece 72 so as to project from the peripheral edge portion of the opening, and when the high-viscosity fluid 34 is filled in the container body, the lid 70 is attached to the container body 54. When fixed, the elastic protrusion 72 acts as a seal piece.

On the other hand, the damper 74 shown in FIG. 6 is a nylon resin fitting member 78 integrally provided with a thin and elastic annular protrusion 76.
Is fitted and fixed in the fitting recess 80 formed in the container body 30.

Also in this example, the annular protruding piece 76 acts as a sealing piece and prevents the high-viscosity fluid 34 from leaking.

Although the embodiments of the present invention have been described in detail above, the present invention can be configured in other forms. For example, the present invention can be applied to various forms and types of viscous fluid-sealed dampers other than the above, and viscous fluid-sealed dampers for supporting a supported member other than a CD player. Without departing from the above, it can be configured in a form in which various changes are made based on the knowledge of those skilled in the art.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a viscous fluid-sealed damper according to an embodiment of the present invention, FIG. 2 is a view showing a state where a CD player is supported by the damper, and FIG. 3 is FIGS.
FIG. 4 is a view showing an assembling process of the viscous fluid-sealed damper shown in FIG. 4, and FIG. 4 is an explanatory view of the action of the annular protrusion of the damper. FIG. 5 is a sectional view of a damper according to another embodiment of the present invention before being assembled, and FIG. 6 is a sectional view of a damper according to another embodiment of the present invention before being assembled. Is. 16,53,74: Viscous fluid-filled damper 30,54: Container body 32,70: Lid 34: Viscous fluid 52,72,76: Annular protrusion 78: Fitting member

Claims (1)

[Claims] 1. A supporting member and a supported member, comprising: a container body; a lid body fixed to the container body to close an opening thereof; and a viscous fluid sealed in a space formed therebetween. A viscous fluid-sealed damper interposed between the lid body and the damper body in a free state before the lid body is fixed, the lid body body proceeding from a peripheral edge portion of the opening of the container body toward a center side of the opening body. From the end surface on the opening side of the container body that becomes the mating surface with
It has a form extending in an inclined state in a direction away from the fluid chamber formed in the container main body, and elastically abuts on the inner surface of the lid in the fixed state of the lid and falls toward the center of the opening. A viscous fluid-sealed damper, characterized in that an annular projecting piece made of an elastic material as a bank piece and a sealing piece that elastically deforms into a shape is provided on the entire circumference along the peripheral edge of the opening of the container body.