JP2505461Y2 - Viscous fluid filled damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a viscous fluid-sealed damper having a highly viscous fluid sealed therein.

(Prior Art) For example, in a CD player mounted in a vehicle, etc., if the vibration of the vehicle body is transmitted to the CD player as it is, sound skipping or the like may occur, so in order to prevent this, a viscous fluid filled damper is used. CD players are being supported by vibration isolation.

Here, the viscous fluid-sealed damper forms a hermetically sealed container body in which a high-viscosity fluid is sealed, and absorbs vibration based on the flow resistance of the high-viscosity fluid.
Specifically, this damper has a stirring shaft portion that protrudes into the container and a flexible floating support portion that elastically supports the stirring shaft portion in a floating state. The high-viscosity fluid inside the container is caused to flow by such a displacement, and the flow resistance at that time absorbs the vibration energy.

By the way, in this damper, the stirring shaft portion is displaced relatively in the axial direction and abuts the opposing bottom wall portion,
There was a drawback that the impact at that time could cause sound skipping.

(Means for Solving the Problems) The present invention has been made to solve such problems, and the gist thereof is (a) a cylindrical peripheral wall portion and (b).
(C) A cylindrical shape with a bottom wall portion that closes an opening on one end side of the peripheral wall portion, and (c) a bottom, and is located in the peripheral wall portion from the center portion of the other end side opening in the axial direction from the bottom side. The agitation shaft portion is provided so as to rush in and axially face the bottom portion of the bottom wall portion with a predetermined distance from the center portion of the bottom wall portion, and (d) close the other end side opening of the peripheral wall portion. Is placed in a state in which the entire circumference of the opening-side end of the stirring shaft and the peripheral wall are connected, and the thickness is thinner than the thickness of the stirring shaft and the stirring shaft can be moved in three dimensions. A flexible floating support that supports a simple floating state,
(E) A high-viscosity fluid enclosed in a space surrounded by the peripheral wall portion, the bottom wall portion, the floating support portion and the stirring shaft portion, the peripheral wall portion and the bottom wall portion being a supporting member or a supported member. The agitating shaft part is fixed between the supporting member and the supported member in a state in which a shaft body fixed to one side and provided in the other side in the fitting hole at the center of the agitating part is fitted from the opening side. A viscous fluid-sealed damper that performs a vibration-damping action based on the viscous flow of the high-viscosity fluid based on the relative stirring motion in the three-dimensional direction of the bottom wall portion, the peripheral wall portion, the floating support portion, and the stirring portion. A bottom wall that is formed separately from the main body composed of the shaft portion, and that includes the center portion of the bottom wall portion that axially opposes the bottom portion of the stirring shaft portion and excludes the annular outer peripheral edge portion of the bottom wall. The main body is made of a soft material, and the outer peripheral edge of the bottom wall is made of a hard resin material harder than the soft material. The annular outer peripheral edge portion of the peripheral wall portion corresponding to the outer peripheral edge portion of the annular bottom wall is formed of a hard resin material that is harder than the soft material, and these outer peripheral edge portions are fixed to each other by welding resin to each other, and then assembled. It is being done.

(Operation and Effect of Invention) As described above, in the damper of the present invention, most of the center portion of the bottom wall portion that faces the stirring shaft portion in the axial direction is formed of a soft material such as a soft resin material or a rubber material. Therefore, when the stirring shaft portion is largely displaced in the axial direction, the stirring shaft portion softly contacts the opposing bottom wall portion. Therefore, it is possible to prevent the deterioration of the vibration isolation performance due to the contact between the stirring shaft portion and the bottom wall portion, or to suppress it as small as possible.

In the damper of the present invention, the main body including the peripheral wall portion and the stirring shaft portion and the bottom wall portion are molded separately, and the outer peripheral edge portions of each are made of a hard resin material. As a result, in the present invention, the main body and the bottom wall are welded to each other with resin,
In particular, it can be fixed by an ultrasonic welding method, and in such a case, unlike the case of joining and assembling by an adhesive reaction of an adhesive, the fixing of the main body and the bottom wall is highly reliable, and The main body and the bottom wall can be firmly fixed to each other.

(Example) Next, the Example of this invention is described in detail based on drawing.

In FIG. 1, reference numeral 10 denotes a viscous fluid-sealed damper, which is a closed container in which a container body (first body) 12 and a lid body (second body) 14 forming a bottom wall portion of the damper 10 are integrally assembled. Highly viscous viscous fluid that forms a state and is enclosed inside
The vibration is absorbed based on the viscous flow of.

The container body 12 has a thick outer peripheral edge portion 22, a peripheral wall portion 24, a thin flexible floating support portion 26, and a stirring shaft portion 28 that projects into the viscous fluid 16. Fitting hole in the stirring shaft 28
30 is formed, and the shaft body of the supporting member or the supported member is fitted into the fitting hole 30.

In this container body 12, the outer portion (outer peripheral wall portion 32) of the thick outer peripheral edge portion 22 and the peripheral wall portion 24 is harder than a hard resin material, that is, a soft material that is a constituent material of the bottom wall body portion 15 described later. Made of hard resin material (eg polypropylene), and the inner wall
34, the flexible floating support portion 26, and the stirring shaft portion 28 are made of a soft resin material (for example, thermoplastic rubber) softer than this.

The outer peripheral wall portion 32 made of a hard resin material has a second
As shown in detail in the drawing, a vertical through hole 36 is formed, and a part of the inner peripheral wall portion 34 made of a soft resin material enters into the through hole 36, whereby a component portion made of a hard resin material and a soft resin material are formed. Are structurally connected to each other. That is, here, the vertical through hole 36 is configured as a concave portion for connection, and the rod-shaped portion 38 that has entered the through hole 36 is configured as a convex portion for connection.

On the other hand, in the lid body 14, the main body portion (bottom wall main body portion) 15 is made of a soft resin material (for example, thermoplastic plastic rubber.
May be a rubber material), and the annular outer peripheral edge portion (bottom wall outer peripheral edge portion) 17 is formed of a hard resin material (for example, polypropylene) that is harder than the soft resin material (or rubber material). , They are integrally molded. That is, in this example, the lid 14 constitutes the bottom wall portion on the side facing the stirring shaft portion 28 in the axial direction, and most of the portion including the central portion directly facing the stirring shaft portion 28 in the axial direction is soft. Formed of material,
Further, the outer peripheral portion of the portion formed of this soft material is formed of a hard resin material.

As shown in detail in FIG. 2, upper and lower through holes 18 are formed in the outer peripheral edge portion 17 made of a hard resin material, and the soft resin material constituting the main body portion 15 is formed in the through hole 18. Are inserted, and the body portion 15 and the outer peripheral edge portion 17 are geometrically connected by the through hole 18 and the rod-shaped portion 20 that has entered the through hole 18.

Both the lid 14 and the container body 12 are integrally formed with constituent parts made of different materials. As the molding method, for example, a hard resin material is first molded in the same mold to mold a part of the lid 14 or the container body 12, and then a soft resin material is molded in the same mold to form another part. A two-color molding method for molding can be used. At this time, the molded soft resin material adheres to the previously molded hard resin material at its joint surface, and at the same time, flows into the through holes 18 and 36 to form the geometrical connection structure portion.

FIG. 2 shows the lid 14 and the container body 12 molded in this way.
And the state before each fixation is shown. Lid 14 as shown
The outer peripheral edge portion 17, that is, the downward protrusion 40 is formed in the portion made of a hard resin material, while the fitting recess 41 and the seat surface 42 are formed on the container body 12 side, Then, when the lid body 14 is fitted into the fitting recess 41 and the hard resin portions thereof are welded (for example, ultrasonic welding), the container body 12 and the lid body 14 are integrally and firmly fixed.

In this example, a seal portion 44 is formed on the component portion of the lid body 14 made of a soft resin material as shown in detail in FIG. 2, and when the container body 12 and the lid body 14 are fixed to each other, Good sealing is done.

The damper 10 of this example is further added because the main body 15 of the lid 14 is made of a soft material, that is, the portion axially opposed to the stirring shaft 28 is made of a soft material. Since the stirring shaft portion 28 itself is also made of a soft material, when the stirring shaft portion 28 makes a large relative displacement in the axial direction and hits the lid body 14, they can be brought into soft contact with each other. Therefore, it is possible to suppress the deterioration of the vibration isolation characteristic due to the contact between the stirring shaft portion 28 and the lid 14 as small as possible.

Although the embodiments of the present invention have been described in detail above, the present invention can be configured in other forms.

For example, as described above, the main body portion 15 of the lid 14 can be made of a rubber material, or can be made of another soft material.

Further, the shape of the portion of the lid body 14 that directly faces the stirring shaft portion is formed so that it can be softly deformed when the stirring shaft portion comes into contact with the stirring shaft portion, for example, it is formed into a partial arcuate cross section, or has another shape. It is also possible that the stirring shaft portion is softly abutted against the lid body due to both the softness of the material and the elastic deformability of the shape. Others The present invention can be configured with various modifications without departing from the spirit of the invention.

[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, and FIG. 2 is a cross-sectional view of essential parts showing a state before the container body and the lid body in FIG. 1 are fixed. 10: Viscous fluid-filled damper 12: Container body, 14: Lid body 15: Main body part, 16: Viscous fluid 17: Outer peripheral edge part, 18, 36: Through hole 20,38: Rod-shaped part, 22: Outer peripheral edge part 26: Flexible floating support 28, stirring shaft

Claims (1)

(57) [Scope of utility model registration request] 1. A cylindrical peripheral wall portion, which comprises (a) a cylindrical peripheral wall portion, (b) a bottom wall portion which closes an opening on one end side of the peripheral wall portion, and (c) a cylindrical shape with a bottom, wherein the peripheral wall portion has a cylindrical shape. The agitation provided so as to axially project from the bottom side into the peripheral wall portion from the center portion of the opening on the other end side, and to make the bottom portion thereof axially face the center portion of the bottom wall portion with a predetermined distance therebetween. The shaft portion and (d) are arranged such that the other end side opening of the peripheral wall portion is closed and the entire circumference of the opening side end portion of the stirring shaft portion is connected to the peripheral wall portion. A flexible floating support portion that is thinner than the wall thickness and supports the stirring shaft portion in a floating state that is movable in three-dimensional directions; and (e) the peripheral wall portion, the bottom wall portion, the floating support portion, and the stirring shaft portion. A high-viscosity fluid enclosed in a space surrounded by a portion, the peripheral wall portion and the bottom wall portion being fixed to one of a supporting member or a supported member and a center of the stirring shaft portion. The shaft body provided on the other side in the dowel is inserted between the supporting member and the supported member in a state of being fitted from the opening side, and the agitating shaft portion is based on a relative agitating motion in a three-dimensional direction. A viscous fluid-sealed damper that performs a vibration-damping action based on viscous flow of a high-viscosity fluid, wherein the bottom wall portion is formed separately from the main body including the peripheral wall portion, the floating support portion, and the stirring shaft portion. A bottom wall main body portion of the bottom wall portion including a central portion axially opposed to the bottom portion of the stirring shaft portion and excluding an annular bottom wall outer peripheral edge portion is a soft material, and the bottom wall outer peripheral edge portion Is formed of a hard resin material that is harder than the soft material, while the annular outer peripheral edge portion of the peripheral wall portion that corresponds to the annular bottom wall outer peripheral edge portion is formed of a hard resin material that is harder than the soft material, Make sure that the outer peripheral edge portions are fixed and assembled by welding resin to each other. Viscous fluid-sealed damper according to claim.