JPH04157225A - Viscous fluid-sealed damper and its mounting construction - Google Patents

Abstract

PURPOSE:To obtain a large damping force by forming a surface to be pressed-on the outer periphery of a peripheral wall positioned far away from a mounting surface than the top end position of a stirring portion projected into viscous fluid, forming a pressing surface 2 a mounting member, and pressing and fixing the surface to be pressed onto the mounting surface side by means of the pressing surface. CONSTITUTION:A damper 10 is mounted between members to be supported or supporting members by pressing the surface to be pressed 26 of a peripheral wall 18 formed at a position higher than the top end of a stirring portion 16, i.e., a position away from a mounting surface 25 by means of a pressing surface 33 formed at a height equal to a holder 28, to bind the damper between the mounting surface 25 and pressing portion 32. Since the peripheral wall 18 is thick and its rigidity is increased and the portion H from the bottom rear surface 24 to the top of the peripheral wall 18 is held and fixed firmly by a holder 28, the deformation of the peripheral wall 18 is suppressed even when the stirring portion 16 is deformed due to vibration and shock applied to it. By this, high viscous fluid 12 inside is stirred and fluidized sufficiently and large damping force can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a viscous fluid-filled damper having a viscous fluid sealed therein.

(Background of the Invention) When a CD player is mounted on a vehicle, etc., in order to prevent the vibrations of the vehicle from being directly transmitted to the CD player and causing skipping, conventionally, as shown in FIG. A viscous fluid injection damper 102 is interposed between the CD player 100 and the support member 101. Here, the viscous fluid-filled damper 102 is of a type in which a highly viscous fluid is sealed inside a container, and a structure as shown in FIG. 3(B) has been considered as a mounting structure for such a damper to a support member. In this figure, 102 is a damper made entirely of a rubber material and has a container shape, and a highly viscous fluid 103 is sealed inside. This damper 1
02 is a stirring part 104 that plunges into the high viscosity fluid 103
It has a thin flexible part 106 and a cylindrical peripheral wall part 108 that elastically support this in a floating state at the base end. The stirring part 104 is provided with a fitting hole part 110,
The shaft of the supporting member or the supported member is fitted here. This stirring section 104 and the surrounding wall section 1
The highly viscous fluid 103 is stirred based on the relative displacement with the main body side including 08, etc., and the transmission of vibration from the supporting member to the supported member is absorbed by the energy absorption at that time.

This damper 102 has a short flange 116 at the base end on the opposite side from the 6 flexible parts 106, and the upper surface of this flange 116 is attached to a resin holder (mounting member) 12.
It is held down by a stepped portion 122 of 0. That is, with the end surface 112 on the opposite side of the flexible portion 106 seated on the mounting surface 114 of the supported member or supporting member, the upper surface of the 7 flange 116 is attached to the mounting surface 1 with the holder 120.
14, and is fixed to the mounting surface 114 via the holder 120.

(Problem to be Solved by the Invention) By the way, in this damper 102, the flexible portion 106
It is necessary to support the stirring part 104 softly in the
Therefore, extremely soft materials with a hardness of about 20 to 30 degrees have been used as rubber materials.

However, with such a soft material, the damper 102
, the flange 116 and the peripheral wall 108 are naturally formed.
The material also became soft, which caused the following problems.

That is, since the flange 116 is soft, the flange 116 is easily deformed when vibration or impact is input in the above mounting structure, and although the peripheral wall portion 10g is restrained to some extent by the cylindrical portion 121 of the holder 120, the cylindrical portion 1
21 is likely to be deformed in the direction away from the inner surface (in the direction of arrow P in the figure), and as a result, the relative displacement between the stirring part 104 and the peripheral wall part 108 and the flow of the highly viscous fluid 103 based on this do not occur sufficiently, resulting in large damping. This causes problems such as not being able to obtain sufficient force.

Therefore, only when a particularly large damping force is required, the peripheral wall part 108 and the peripheral wall part 121 of the holder 120 are fixed with adhesive, but in this case, the installation process of the damper 102 is complicated. This results in an increase in costs.

(Means for Solving the Problems) The present invention has been made to solve such HIl, and its gist is a hollow shaft-shaped portion coupled to a supporting member or a supported member, A viscous fluid-filled damper has a stirring part that plunges into a viscous fluid sealed inside a container, a peripheral wall part surrounding the stirring part, and a thin flexible part that elastically supports the stirring part in a floating state. , with the end surface opposite to the flexible portion seated on the mounting surface of the supported member or supporting member, the mounting member presses the end surface onto the mounting surface.
In the mounting structure of the viscous fluid-filled damper to be fixed, a pressed surface is formed on the outer circumferential side of the peripheral wall portion at a position farther from the mounting surface than the tip position of the agitating portion that plunges into the viscous fluid, and the corresponding A pressing surface is formed on the mounting member at the position, and the pressing surface presses and fixes the pressed surface toward the mounting surface.

(Operations and Effects of the Invention) In the above mounting structure, the reason why the peripheral wall portion deforms as the agitating portion is displaced is that the damper fixing position (pressed surface position) is close to the mating mounting surface. This is due to This example was created with this in mind, and the suppressed surface of the damper is formed at a position farther away from the mounting surface than the position of the tip of the agitating section, and this is moved to the mounting surface side by the mounting member. It is designed to be pressed and fixed against the other hand.

In this way, the part of the damper that is far away from the base end of the plate side of the damper, specifically, the part that is further away than the tip of the agitation part, will be connected to the other side's mounting surface and the pressing surface of the mounting member. It is firmly sandwiched between the two and is firmly fixed. For this reason, when the stirring section attempts to displace upon input of vibration or impact, deformation of the peripheral wall section is effectively suppressed. As a result, the viscous fluid is stirred sufficiently and a large damping force can be obtained.

(Example) Next, embodiments of the present invention will be described in detail based on the drawings.

In FIG. 1, IO is a viscous fluid-filled damper in the form of a closed container made entirely of rubber material, and 12 is a highly viscous fluid sealed inside. This tamper 10 includes a fitting hole 14 into which the shaft of a supporting member or a supported member is fitted, and an agitating portion 16 which projects into the high viscosity fluid 12;
The cylindrical peripheral wall part 18, the thin pleated flexible part 20 that connects the stirring part 16 and the peripheral wall part 18 and elastically supports the stirring part 16 in a floating state, and the one peripheral wall part 18 are separate bodies. It has a bottom portion 22 fixed thereto with adhesive.

As is clear from the comparison with FIG. 3(B), the peripheral wall portion 18 has a thick wall throughout, and has a pressed surface held at a predetermined height position by a resin holder 28. 2
6 is formed substantially parallel to the back surface of the bottom portion 22 and over the entire circumference of the peripheral wall portion 18.

The holder 28 is a member for attaching the damper lO to a supported member or a supporting member, and includes a cylindrical main body part 29 that fits with the outer circumferential surface of the peripheral wall part 18 almost without a gap, and a lower end and an upper end of the main body part 29. It has an outward flange and an inward flange formed in the same direction, with the inward flange serving as a pressing part 32 and the outward flange serving as a fixing part 30 to the other side.

FIG. M1 (B) shows the state where the damper 10 is attached to the other side. As shown in FIG. The part from to the height H in the peripheral wall (however, the height in the installed state) is the tightening allowance d (Fig. 1 (A
)) is compressed by the holder 28, and in that state, the bottom back surface 24 is mounted on the mating mounting surface 25. Here, the height H is greater than the height h of the tip of the stirring section.

The damper lO of this example does not use the conventional fixing method using a flange, and is instead fixed by pressing down on the stepped part formed on the peripheral wall 18, that is, the shoulder of the peripheral wall 18, which is different from the conventional fixing method. It can also be considered that the height of the 7th lunge has been moved to a higher position.

In any case, in this example, the pressed surface 26 of the peripheral wall section 18, which is formed at a higher position than the tip of the agitating section 16, that is, at a position farther from the mounting surface 25, is formed at a corresponding height position of the holder 28. The damper lO is pressed by the suppressing surface 33 and is sandwiched between the mounting surface 25 and the pressing portion 32, so that it is attached between the supported member or the supporting members.

In the case of this mounting structure, in addition to the fact that the peripheral wall part 18 is made thick and its rigidity is increased, that is, the deformation resistance is increased, the height H of the peripheral wall part 18 from the bottom back surface 24 is
The extended portion is firmly held and restrained by the holder 28. Therefore, the peripheral wall 18 and the holder 28
Even if you do not intentionally adhere the main body part 29 of the
Stirring 1 when inputting vibration fist impact! When s16 is displaced, for example, in the left-right direction in the figure, the peripheral wall portion 18 is prevented from deforming accordingly. Therefore, the high viscosity fluid 12 inside can be sufficiently stirred and flowed, and the high viscosity fluid 12 can be stirred and flowed sufficiently.
A large damping force can be obtained based on the flow.

Incidentally, the vibration isolation characteristics when the mounting structure of this example is adopted are shown in Table 1 in comparison with the vibration isolation characteristics when the mounting structure shown in FIG. 3(B) is adopted.

Table 1 As shown in this table, it can be seen that in the case of the mounting structure of this example, the resonance magnification is reduced and the damping characteristics are improved.

The embodiments of the present invention have been described in detail above, but these are merely examples, and the present invention may have a holder shape such as a holder 34 as shown in FIG. 2, or various other shapes depending on the shape of the other party. It is possible to make the shape different from the upper side.

It is possible to configure the present invention with various modifications based on the knowledge of those skilled in the art without departing from the spirit thereof, such as being applicable to other types of dampers.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a viscous fluid-filled damper and its mounting structure as one embodiment of the present invention, and FIG. 2 is a sectional view showing another embodiment of the present invention. FIG. 3 is an explanatory diagram for explaining the background of the present invention. lO: Viscous fluid filled damper 12: High viscosity fluid 18: Peripheral wall portion 20: Flexible portion 24: Back surface 25: Mounting surface
26: Pressed surface 28: Holder 32: Pressing portion 33: Suppressing surface Patent applicant Tokai Rubber Industries Co., Ltd. jl! Figure 1 Figure 2

Claims (2)

[Claims] (1) A stirring part that is a hollow shaft-shaped part that is coupled to the support member or the supported member and that plunges into the viscous fluid sealed inside the container, a peripheral wall part that surrounds the stirring part, and A viscous fluid-filled damper having a thin flexible part that elastically supports the stirring part in a floating state is seated with the end surface opposite to the flexible part on the supported member or the mounting surface of the supporting member. A mounting structure for a viscous fluid-filled damper that is pressed and fixed onto the mounting surface by a mounting member is provided on the outer circumferential side of the peripheral wall portion at a position farther from the mounting surface than the tip position of the stirring portion that plunges into the viscous fluid. The viscosity is characterized in that while forming a pressed surface, a pressing surface is formed on the mounting member at a corresponding position, and the pressing surface presses and fixes the pressed surface to the mounting surface side. Mounting structure of fluid-filled damper. (2) A stirring part that is a hollow shaft-shaped part that is coupled to the support member or the supported member and that plunges into the viscous fluid sealed inside the container, and a peripheral wall that surrounds the stirring part; A thin flexible part that elastically supports the agitation part in a floating state, and the end surface opposite to the flexible part is seated on the mounting surface of the supporting member or supported member and the mounting member is used to attach the stirring part. A damper filled with viscous fluid that is pressed and fixed onto a surface,
A pressed surface is formed with respect to the mounting surface by the mounting member on the outer circumferential side of the peripheral wall portion at a position farther from the mounting surface than the tip position of the agitating portion that plunges into the viscous fluid. Viscous fluid filled damper.