JPH0821481A - Variable damping force type vibration control mount - Google Patents

Abstract

PURPOSE:To provide a damping force varying type vibrationproof mount which can vary the damping force and can attenuate the prescribed vibration of a vibration generation part which is supported. CONSTITUTION:The upper wall 12B of a body 12 is formed thin, and can be made deformable. A liquid chamber 29 is formed of the body 12 and a bottom cover 16, and the inside is charged with the electric viscous fluid 31. In the liquid chamber 20, a vibration plate 26 connected with the upper wall 12B by a bolt 22 is arranged. On the outer periphery of the vibrating plate 26, an electrode 30 is fixed, and connected with the plus side of a dc high voltage electric power source 34, and the body 12 is connected with the minus side. When a lateral axis angular table type flat surface grinding machine 44 is supported, and the vertical vibration is inputted on the upper wall 12B, the vibrating plate 26 vibrates in the vertical direction, and is applied with the resistance of the electric viscous fluid 31. Accordingly, vibration is attenuated. By varying the applied voltage, the viscosity of the electric viscous fluid 31 varies. and the damping force varies.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damping force capable of supporting a vibration generating portion of a machine tool, an industrial machine, a precision machine or the like, damping the vibration of the vibration generating portion, and varying the damping force. Variable vibration mount.

[0002]

2. Description of the Related Art Conventionally, the installation state of a machine tool has been
It is known to affect the dynamic behavior as well as the level of the machine.

Particularly, in a horizontal-axis / square-table surface grinder, an oscillating mode vibration of the entire grinder with an installation portion as a node is generated due to an impact force when the work table is inverted, and a grinding wheel-work table It has been found that the relative movements of the swell often appear on the workpiece as undulations.

[0004]

By the way, the surface grinder is generally installed on the concrete floor by the installation jack bolt for horizontal level adjustment and the installation mount supplied by the manufacturer. In such an installation method, the surface grinding machine is installed. Is not enough to actively suppress the vibration of
Measures were desired.

As a countermeasure against the above problem, it may be considered to support the surface grinder with a rubber mount. Although the rubber mount can prevent the vibration transmission to the floor, the vibration generated in the surface grinder can be prevented. The effect of attenuating is small.

Further, there are various forms of vibration generated in equipment such as a surface grinder, and it is desired that one mount can cope with various vibrations.

In view of the above facts, it is an object of the present invention to provide a damping force variable anti-vibration mount capable of varying damping force and effectively damping predetermined vibration of a supporting vibration generating portion.

[0008]

According to a first aspect of the present invention, there is provided a variable damping force antivibration mount, which is disposed between a vibration generating part and a vibration receiving part and which is in contact with the vibration generating part. A second portion that faces the one portion at a predetermined interval and is in contact with the vibration receiving portion, a frame-shaped third portion that connects the first portion and the second portion, and the first portion. A mount body having a liquid chamber formed by the second portion and the third portion, an electrorheological fluid that is filled in the liquid chamber and whose viscosity changes by applying an electric field, and the liquid chamber A vibrating plate that divides the first portion and the second portion into two small liquid chambers substantially in a direction connecting the first portion and the second portion; a connecting rod that connects the first portion and the vibrating plate; An electric field is applied to the electrorheological fluid and the orifice that connects the liquid chambers to each other. Even without and a pair of electrodes, at least one of said first portion and said third portion is characterized by elastic deformation.

According to a second aspect of the present invention, in the variable damping force antivibration mount according to the first aspect, the orifice is formed between the outer periphery of the diaphragm and the mount body, and the pair of electrodes are One of them is provided on the outer periphery of the diaphragm, and the other is provided on a portion of the mount main body facing the one electrode.

According to a third aspect of the present invention, in the variable damping force antivibration mount according to the first aspect, the orifice is formed between the outer periphery of the diaphragm and the mount body, and the pair of electrodes are One of them is provided in a portion of the diaphragm facing the small liquid chamber, and the other is provided in a portion of the mount body facing the one electrode.

According to a fourth aspect of the present invention, in the variable damping force antivibration mount according to the first aspect, the orifice is formed in the diaphragm, and the pair of electrodes are provided in the diaphragm so as to sandwich the orifice. It is characterized in that they are provided at a predetermined interval.

According to a fifth aspect of the present invention, in the variable damping force antivibration mount according to any one of the first to fourth aspects, two or more connecting rods are provided at a predetermined distance from each other. It is characterized by being.

According to a sixth aspect of the present invention, in the variable damping force antivibration mount according to any one of the first to fifth aspects, the mount body is made of a metal material, and the first portion is formed. Also, at least one of the second portion is formed thin and elastically deforms.

According to a seventh aspect of the present invention, in the damping force variable vibration isolation mount according to any one of the first to fifth aspects, at least one of the first portion and the third portion is It is characterized by being formed of an elastomer elastic body.

[0015]

Function As is generally known, an electrorheological fluid is a suspension in which finely divided dielectric solids are dispersed in an electrically insulating liquid, under the action of a sufficiently strong electric field. Is a fluid whose viscosity changes remarkably quickly and reversibly. In order to change the viscosity of an electrorheological fluid, not only a DC electric field but also an AC electric field can be used, and the required current is very small. Can be given.

The damping force variable vibration isolation mount according to claim 1 is arranged, for example, on a floor which is a vibration receiving portion, and a vibration generating portion (for example, a machine tool or the like) is mounted thereon for use. To do. Here, the second portion comes into contact with the floor and the first portion comes into contact with the vibration generating portion. When the vibration generator vibrates, the vibration is transmitted to the mount body, and at least one of the first portion and the third portion elastically deforms. As a result, the vibrating plate connected to the first portion via the connecting rod vibrates in the liquid chamber, and the electrorheological fluid moves back and forth between the two small liquid chambers via the orifice. At this time, the vibration plate receives the resistance of the electrorheological fluid, so that the vibration of the vibration generating unit is attenuated. Here, when a voltage is applied to the electrodes and an electric field is applied to the electrorheological fluid, the viscosity of the electrorheological fluid can be increased,
As a result, the resistance that the diaphragm receives during vibration can be increased and the damping force can be increased. Since the viscosity of the electrorheological fluid can be freely set by adjusting the voltage applied to the electrodes, the damping force of the variable damping force antivibration mount can be set so as to most effectively damp desired vibration.

According to another aspect of the present invention, in the variable damping force vibration isolation mount, the viscosity of the electrorheological fluid in the orifice formed between the outer periphery of the diaphragm and the mount body is adjusted by adjusting the voltage applied to the electrodes. Can be changed. This makes it possible to change the damping force of the damping force variable vibration isolation mount by changing the resistance received by the diaphragm during vibration.

In the variable damping force antivibration mount according to the third aspect, the viscosity of the electrorheological fluid in the small liquid chamber can be changed by adjusting the voltage applied to the electrodes.
This makes it possible to change the damping force of the damping force variable vibration isolation mount by changing the resistance received by the diaphragm during vibration.

In the damping force variable vibration isolation mount according to the fourth aspect, the viscosity of the electrorheological fluid in the orifice formed in the diaphragm can be changed by adjusting the voltage applied to the electrodes. This makes it possible to change the damping force of the damping force variable vibration isolation mount by changing the resistance received by the diaphragm during vibration.

In the variable damping force antivibration mount according to the fifth aspect of the present invention, since two or more connecting rods are provided at a predetermined distance from each other, the connection between the first portion and the vibrating plate can be made more reliable and the vibration can be prevented. At the time of input, the movement of the first portion matches the movement of the diaphragm.

In the damping force variable vibration-damping mount according to the sixth aspect, at least one of the first portion and the third portion is formed thin, so that when vibration is input, the side formed thin is elastically deformed. Then, the diaphragm connected to the first portion vibrates.

In the variable damping force antivibration mount according to the seventh aspect, at least one of the first portion and the third portion is formed of an elastomer elastic body, so that when vibration is input, it is formed of an elastomer elastic body. The elastic side is elastically deformed, which causes the diaphragm connected to the first portion to vibrate.
Further, since the elastomer elastic body is provided with the spring element (K) and the damper element (C), the mount body can absorb and damp the vibration, so that the vibration transmission from the vibration generating section to the vibration receiving section is further facilitated. It can be effectively blocked.

[0023]

【Example】

[First Embodiment] Variable damping force antivibration mount 1 of the first embodiment.
0 will be described with reference to FIG.

As shown in FIG. 1, the variable damping force anti-vibration mount 10 of this embodiment has a cylindrical main body 12 made of steel. A circular concave portion 14 is coaxially formed on the lower side of the main body 12, and a side wall 12A as a third portion is formed.
Is formed thick. The upper wall 12B as the first portion of the main body 12 is formed thinner than the side wall 12A, and is elastically microdeformable in the axial direction.

A bottom lid 16 as a second portion made of a circular steel plate is screwed to the lower side of the main body 12, and the recess 14 is closed by the bottom lid 16.

A boss 12C is integrally formed in the upper center of the upper wall 12B, and a countersink 17 and a circular hole 19 are coaxially formed in the boss 12C.

A head of a bolt 22 (M4 bolt in this embodiment) as a connecting rod is press-fitted and fixed in the circular hole 19. The bolt 22 has a threaded portion extending downward, and a spacer 24 and a diaphragm 26 are inserted into the threaded portion and fixed by a nut 28.

The vibrating plate 26 is formed of a thick insulator, and is located in the vertical middle portion of the recess 14.

An electrode 30 made of a thin metal plate is fixed to the outer circumference of the diaphragm 26 of this embodiment. One end of a high voltage cord 32 is connected to the electrode 30, and the other end of the high voltage cord 32 is connected to the positive side of a DC high voltage power source 34. The middle portion of the high-voltage cord 32 has an insulator 36.
Is supported by an electric wire hole 38 formed in the upper wall 12B.

On the other hand, the main body 12 also serves as the other electrode, and is connected to the negative side of the DC high voltage power source 34 via the high voltage cord 40.

The internal space of the variable damping force antivibration mount 10 is a liquid chamber 20 filled with an electrorheological fluid 31. In the liquid chamber 20, the upper side of the vibration plate 26 is the upper liquid chamber 20A,
The lower side is the lower liquid chamber 20B, and when the vibrating plate 26 is displaced in the vertical direction, the electrorheological fluid 31 passes through the orifice 41 between the outer periphery of the vibrating plate 26 and the inner periphery of the recess 14 and the upper liquid chamber 20A. And the lower liquid chamber 20B.

Variable damping force antivibration mount 10 of this embodiment
Has an outer diameter D1 of φ120 mm and a height H1 of 40 mm,
Inner diameter D2 of liquid chamber 20 is φ90 mm, thickness T2 of upper wall 12B
Is 5 mm, the outer diameter D4 of the boss 12C is φ30 mm, the height H2 of the boss is 5 mm, the thickness T3 of the bottom lid 16 is 10 mm, and the diaphragm 26
Thickness T1 is 11 mm, and outer diameter D3 of electrode 30 of diaphragm 26 is
Is 86 mm.

The variable damping force anti-vibration mount 10 is placed on the concrete floor 42 as a vibration receiving part, and the dish fir 17 of the variable damping force anti-vibration mount 10 has a horizontal axis angle table as a vibration generating part. Type surface grinder 44 (weight 1000
(kg), the tapered tip end portion of the height adjusting leg bolt 46 attached to the lower corner portion is provided.

Next, the operation of this embodiment will be described. When, for example, oscillating mode vibration occurs in the horizontal-axis square table type surface grinder 44, the height adjusting leg bolt 46 vibrates in the vertical direction due to the vibration, and the vertical vibration causes the damping force variable vibration control. It is transmitted to the mount 10.

The vertical vibration transmitted to the variable damping force anti-vibration mount 10 is transmitted through the upper wall 12B and the bolt 22 to the vibration plate 26.
Is transmitted to As a result, the vibrating plate 26 vibrates in the vertical direction, receives the resistance of the electrorheological fluid 31, and quickly damps the vibration. When the diaphragm 26 vibrates in the vertical direction, the electrorheological fluid 31 moves back and forth between the upper liquid chamber 20A and the lower liquid chamber 20B via the orifice 41.

As a result, it is possible to prevent the undulation (the undulation caused by a slight displacement of the position of the grindstone due to vibration) occurring on the processed surface of the object to be ground.

Further, in the present embodiment, the electrode 30 and the main body 12 are
The viscosity of the electrorheological fluid 31 in the orifice 41 portion can be changed by varying the voltage applied between and, and the diaphragm 26 is made difficult to move by making it difficult for the electrorheological fluid 31 to flow into the orifice 41. You can When the vibrating plate 26 vibrates, the resistance of the electrorheological fluid 31 is received.
Since the damping force is generated in the damping force, it is possible to easily set the damping force of the variable damping force antivibration mount 10 so that the horizontal axis angle table type surface grinder 44 can be most effectively damped by adjusting the applied voltage.

Further, in the variable damping force antivibration mount 10 of the present embodiment, since the portion to be subjected to the load is entirely made of steel material, the horizontal axis square table type surface grinding which weighs 1000 kg even if formed thinly. The board 44 can be supported.

As described above, since the variable damping force antivibration mount 10 of the present embodiment is thin, there is almost no restriction during mounting, and a work such as the horizontal axis angle table type surface grinder 44 is performed. When the equipment is installed, the position of the machine tool does not become higher than the floor and it is not difficult to use. [Second Embodiment] The second embodiment of the variable damping force anti-vibration mount of the present invention
An embodiment will be described with reference to FIGS. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 2, the variable damping force anti-vibration mount 10 of this embodiment has a recess 14 of the main body 12 and an insulator 9 having a constant thickness on the entire inner surface of the bottom lid 16 facing the recess 14.
0 is pasted.

As shown in FIG. 3, the diaphragm 26 is provided with four slits 92 at intervals of 90 degrees. The slit 92 has an arc shape with the center of the diaphragm 26 as the center of curvature, and penetrates the diaphragm 26 with a constant width in the axial direction.

In the vibrating plate 26, the electrode 9 made of a thin metal plate is provided on each of the axial side surface and the outer peripheral side surface of the slit 92.
4 is attached, and an orifice 96 is provided between the electrodes 94 facing each other.

The electrodes 94 on the shaft side are lead wires 98, respectively.
The electrodes 94 on the outer peripheral side are connected by lead wires 100, respectively.

As shown in FIG. 2, these lead wires 9
8, 100 (not shown in FIG. 2) is a high-voltage cord 102.
Is connected to the DC high-voltage power supply 34 via a shaft, the shaft side electrode 94 is connected to the plus side, and the outer peripheral side electrode 94 is connected to the minus side.

Variable damping force antivibration mount 10 of this embodiment
Is the inner diameter D2 of the liquid chamber 20 is φ86 mm, and the thickness T of the liquid chamber 20 is
4 is 21 mm, the outer diameter D3 of the diaphragm 26 is 84 mm, the diaphragm 2
The thickness T1 of 6 is 10 mm, the thickness t of the insulator 90 is 2 mm, and the diameter D5 of the virtual circle passing through the inner surface of the electrode 94 on the outer peripheral side is φ62.
mm, the width W of the orifice 96 is 2 mm, and other dimensions are the same as in the first embodiment.

In the variable damping force anti-vibration mount 10 of this embodiment, vibration is input and the vibration plate 26 is used as in the first embodiment.
When the vibrates in the vertical direction, the electrorheological fluid 31 causes the vibrating plate 2 to
It goes back and forth between the upper liquid chamber 20A and the lower liquid chamber 20B via the orifice 96 formed in 6 and the gap in the outer peripheral portion of the vibration plate 26.

Here, if the voltage applied between the electrodes 94 is varied, the viscosity of the electrorheological fluid 31 in the orifice 96 portion can be changed, whereby the vibrating plate 26 can be changed.
The resistance of the variable vibration damping mount 10 changes and the damping force of the variable damping force antivibration mount 10 changes.

The other operational effects are similar to those of the first embodiment. [Third Embodiment] Third embodiment of the variable damping force antivibration mount of the present invention
An embodiment will be described with reference to FIG. The same components as those in the first and second embodiments are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 4, the variable damping force anti-vibration mount 10 of the present embodiment has the diaphragm 26 of the variable damping force anti-vibration mount 10 of the first embodiment provided with slits 92 and electrodes 94. Is.

In the variable damping force antivibration mount 10 of this embodiment, when vibration is input and the diaphragm 26 vibrates in the vertical direction, the electrorheological fluid 31 passes through the orifices 96 and 41 and the upper liquid chamber 20A and the lower portion. It goes back and forth between the liquid chamber 20B.

In the present embodiment, between the electrodes 94 and between the electrodes 30.
When the voltage applied between the main body 12 and the main body 12 is changed, the viscosity of the electrorheological fluid 31 located in the orifice 96 and the orifice 41 is changed, the resistance received by the diaphragm 26 is changed, and the damping force variable vibration isolation mount is changed. The damping force of 10 changes. [Fourth Embodiment] The fourth damping vibration isolating mount of the present invention
An embodiment will be described with reference to FIG. The same components as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 6, the variable damping force anti-vibration mount 10 of this embodiment is a modification of the variable damping force anti-vibration mount 10 of the first embodiment, and the method of supporting the diaphragm 26 is different. There is. In the variable damping force anti-vibration mount 10 of the present embodiment, a pair of stepped bolts 106 are attached to the upper wall 12B while being separated by a predetermined distance with the axis center therebetween, and the vibration plate 26 is attached by the pair of stepped bolts 106. It is supported.

In this embodiment, since the vibrating plate 26 is supported on the upper wall 12B by the pair of stepped bolts 106, the vibrating plate 26 and the upper wall 12B are more reliably connected to each other, and the upper wall 12B is inputted at the time of vibration input. And the movement of the vibrating plate 26 coincide with each other, so that the damping force variable anti-vibration mount 10 can be controlled more accurately. [Fifth Embodiment] The fifth embodiment of the variable damping force antivibration mount of the present invention.
An embodiment will be described with reference to FIG. This embodiment is the fourth
It is a modification of the variable damping force anti-vibration mount 10 of the embodiment,
The same components as those in the fourth embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In this embodiment, the positive electrode 108 is attached to the lower surface of the diaphragm 26.

In the variable damping force antivibration mount 10 of the present embodiment, when vibration is input and the diaphragm 26 vibrates in the vertical direction, the electrorheological fluid 31 as in the variable damping force antivibration mount 10 of the fourth embodiment. Through the orifice 41 to the upper liquid chamber 2
0A and the lower liquid chamber 20B are moved back and forth, and the vibration is damped by the diaphragm 26 receiving resistance.

In this embodiment, when the voltage applied between the electrode 108 and the bottom lid 16 is changed, the viscosity of the electrorheological fluid 31 in the lower liquid chamber 20B changes, and the resistance received by the diaphragm 26 changes. The damping force of the variable damping force antivibration mount 10 changes. [Sixth Embodiment] The sixth embodiment of the variable damping force antivibration mount of the present invention.
An embodiment will be described with reference to FIG. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

Variable damping force antivibration mount 10 of this embodiment
Is the main body 1 of the damping force variable vibration isolation mount 10 of the first embodiment.
The side wall 12A of 2 is replaced with an elastic ring 110 made of an elastic elastic body such as rubber. In addition,
On the inner surface of the elastic ring 110, the electrode 30 of the vibration plate 26 is provided.
An annular electrode 112 on the minus side is fixed so as to face the.

In the variable damping force antivibration mount 10 of this embodiment, when vibration is input to the upper wall 12B, the elastic ring 11
0 is compressed / stretched and deformed in the axial direction, and along with this, the diaphragm 2
6 is displaced in the axial direction.

In this embodiment, since the elastic ring 108 made of an elastomeric elastic body such as rubber is deformed, it is possible to support a lightweight device as compared with the damping force variable vibration proof mount 10 of the above-mentioned embodiment. It is facing.

Further, since the elastomer elastic body such as rubber constituting the elastic body ring 110 has the spring (K) element and the damper (C) element together, the main body 12 also has an action of damping the vibration. .

The damping force can be changed in the same manner as described above by adjusting the voltage applied to the electrodes 30 and 112. [Seventh Embodiment] Seventh Embodiment of Variable Damping Force Anti-Vibration Mount of the Present Invention
An embodiment will be described with reference to FIG. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

Variable damping force antivibration mount 10 of this embodiment
The main body 12 is formed of an elastomer elastic body such as rubber. The diaphragm 26 is supported by bolts 114 that penetrate the upper wall 12B of the main body 12.

In this embodiment, the whole body 12 made of an elastomer elastic body such as rubber is deformed when vibration is input, and is suitable for supporting a lightweight device.

Further, since the elastomer elastic body such as rubber constituting the main body 12 has both the spring (K) element and the damper (C) element, the main body 12 also has an action of damping the vibration.

The damping force can be changed in the same manner as described above by adjusting the voltage applied to the electrodes 30 and 112. [Embodiment 8] Eighth Embodiment of Variable Damping Force Vibration Isolation Mount of the Present Invention
An embodiment will be described with reference to FIG. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

This embodiment is a modification of the damping force variable vibration isolation mount 10 of the seventh embodiment, in which the plus side electrode 108 is attached to the lower surface of the diaphragm 26.

Like the damping force variable vibration damping mount 10 of the seventh embodiment, the damping force variable vibration damping mount 10 of the present embodiment has a main body 12 made of an elastomer elastic body such as rubber. Also has the effect of damping the vibration.

Further, in the variable damping force antivibration mount 10 of this embodiment, the viscosity of the electrorheological fluid 31 in the lower liquid chamber 20B is changed by changing the voltage applied between the electrode 108 and the bottom lid 16. The damping force of the damping force variable antivibration mount 10 can be changed by changing the resistance received by the diaphragm 26.

When an excessive force is applied, the nut 2
8 contacts the bottom lid 16 to prevent electrode short circuit. [Ninth Embodiment] The ninth embodiment of the variable damping force antivibration mount of the present invention.
An embodiment will be described with reference to FIG. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, the connecting rod 116 made of an insulator is fixed to the upper wall 12B. Metal disk electrodes 118 are arranged at predetermined intervals on the connecting rod 116.
The three disk electrodes 118 are attached, and the three disk electrodes 118 form the diaphragm 26.

Here, the upper wall 12B of the main body 12 and the bottom cover 1
Reference numeral 6 is connected to the negative side of a DC high voltage power source (not shown), and the upper and lower two disk electrodes 118 among the three disk electrodes 118 are the positive side of the DC high voltage power source, and the central disk electrode 118 is the DC high voltage. It is connected to the negative side of the power supply.

In the variable damping force antivibration mount 10 of this embodiment, the upper wall 12B is the same as in the sixth embodiment (see FIG. 7).
When the vertical vibration is input to the elastic body ring 110, the elastic body ring 110 is vertically compressed and stretched and deformed. As a result, the diaphragm 26 vibrates in the vertical direction and receives resistance, and the vertical vibration is attenuated. On the other hand, since the main body 12 is also deformable in the horizontal direction, when horizontal vibration is input to the upper wall 12B, the vibrating plate 26 vibrates in the horizontal direction and the electrorheological fluid 31 moves back and forth between the disc electrodes 118. At this time, since the diaphragm 26 receives resistance, horizontal vibration is damped.

Here, the upper wall 12B of the main body 12 and the bottom lid 16
When a voltage is applied to the three disc electrodes 118, the viscosity of the electrorheological fluid 31 between plus and minus increases. When horizontal vibration is input, it becomes difficult for the electrorheological fluid 31 to pass between the disk electrodes 118, so that the vibration plate 26 that horizontally vibrates receives a large resistance, and the damping force in horizontal vibration increases.

In this embodiment, the damping force for both vertical vibration and horizontal vibration can be varied.

Although the variable damping force antivibration mount 10 of the above-described embodiment has the main body 12 and the vibration plate 26 having a circular shape, the present invention is not limited to this, and the main body 12 and the vibration plate 26 are not circular. Needless to say, it may be a polygon such as a triangle or a quadrangle (see FIG. 11), or may be an ellipse.

Further, the orifice 41 of the diaphragm 26 is not limited to an arc shape, but may be a circle (see FIG. 12), a quadrangle, or the like, and the number to be formed is arbitrary.

The dimension between the positive electrode and the negative electrode is 1 mm per applied voltage of 5000V.
It is preferable to separate them, and it is preferable to secure at least 0.1 mm. Further, it is not preferable to set the distance too much, and the upper limit is about 3 mm.

Although the main body 12 is made of steel in the above embodiment, the main body 12 may of course be made of a metal other than iron and may be made of a hard synthetic resin or the like. And a synthetic resin or the like may be combined. [Experimental Example] An experiment was conducted to confirm the damping effect of the variable damping force antivibration mount 10 of the present invention.

In the experiment, a small horizontal axis angle table type surface grinder having the specifications shown in Table 1 was used. The outline of the experimental device is as shown in FIG.
Used in all four of the point support installations.

In FIG. 13, reference numeral 60 is a horizontal axis table type surface grinder, 62 is a grindstone head, 64 is a table, and 66 is a table.
Is an acceleration detector, 68 is an integrator, 70 is an amplifier, 72 is an FFT 74 is an amplifier, 76 is an impulse hammer, and 78 is a plotter 78.

FIGS. 14 and 15 show the frequency analysis results when a voltage is applied and when the variable damping force anti-vibration mount of the first embodiment is used, and FIG. 14 is a grinding machine column impact. FIG. 15 shows the frequency analysis result when the table is inverted. Comparing the case where the voltage is 0 V and the case where the voltage is applied, it is shown in FIG.
As shown in FIGS. 14A and 14B, the peak at 23.5 Hz of the oscillation mode vibration was reduced from 0.0434 μm / N to 0.0349 μm / N when a voltage of 150 V was applied by about 20%. Further, as shown in FIGS. 15A and 15B, the peak at 23.5 Hz at the time of table inversion is 0.0.
From 181 μm / N when voltage 750 V is applied 0.00843
It was reduced by about 50% to μm / N.

FIG. 16 shows frequency analysis results when a voltage was applied and when no voltage was applied when the variable damping force antivibration mount of the second embodiment was used. The result. Comparing the case where the voltage is 0 V and the case where the voltage is applied, the peak of 28 Hz of the oscillation mode vibration is 0.002 when the grinding machine column is hit.
0.0024 μm when voltage of 2400 V is applied from 7 μm / N
/ N to about 10%.

[0083]

[Table 1]

[0084]

The variable damping force antivibration mount according to any one of claims 1 to 7 can freely set the viscosity of the electrorheological fluid by adjusting the voltage applied to the electrodes, so that the damping can be performed in accordance with a predetermined vibration. It has an excellent effect that the force can be set and the predetermined vibration of the vibration generator can be attenuated most effectively.
In the variable damping force antivibration mount according to the fifth aspect, since the diaphragm can move in coincidence with the first portion during vibration input, the damping force of the variable damping force antivibration mount can be controlled more accurately. It has an excellent effect.

In the variable damping force antivibration mount according to the sixth aspect, since the mount body is made of a highly rigid metal material, it is possible to support a vibration generating portion of high load which cannot be supported by rubber or the like. it can. In addition, since the mount body is made of a highly rigid metal material, the mount body can be made thin, and the height of the variable damping force antivibration mount can be kept low.

Further, in the damping force variable vibration isolation mount according to the seventh aspect, at least one of the first portion and the third portion is formed of the elastomer elastic body, so the spring element (K) of the elastomer elastic body is provided. With the damper element (C), the mount body can absorb and damp the vibration, and the vibration transmission from the vibration generator to the vibration receiver can be more effectively prevented.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view taken along the axis of a damping force variable vibration-proof mount according to a first embodiment.

FIG. 2 is a vertical cross-sectional view passing through an axis of a variable damping force anti-vibration mount according to a second embodiment.

FIG. 3 is a sectional view taken along line 3-3 of the variable damping force anti-vibration mount shown in FIG.

FIG. 4 is a vertical cross-sectional view taken along the axis of a damping force variable vibration damping mount according to a third embodiment.

FIG. 5 is a vertical cross-sectional view passing through an axis of a damping force variable vibration damping mount according to a fourth example.

FIG. 6 is a vertical cross-sectional view taken along the axis of a variable damping force anti-vibration mount according to a fifth embodiment.

FIG. 7 is a vertical cross-sectional view taken along the axis of a damping force variable vibration isolation mount according to a sixth example.

FIG. 8 is a vertical cross-sectional view taken along the axis of a damping force variable vibration damping mount according to a seventh example.

FIG. 9 is a vertical cross-sectional view taken along the axis of a variable damping force anti-vibration mount according to an eighth example.

FIG. 10 is a vertical cross-sectional view through the axis of a damping force variable vibration isolation mount according to a ninth embodiment.

FIG. 11 is a cross-sectional view perpendicular to the axis of a damping force variable vibration control mount according to another embodiment.

FIG. 12 is a cross-sectional view perpendicular to the axis of a variable damping force anti-vibration mount according to another embodiment.

FIG. 13 is a schematic configuration diagram of an experimental device.

14A is a response receptance at the time of hitting a grinding machine column when a non-voltage is applied when the damping force variable vibration-proof mount of the first embodiment is used, and FIG. 2 is a response receptance at the time of hitting a grinding machine column.

15A is a response receptance at the time of reversing the grinding machine table when a non-voltage is applied, in the case of using the variable damping force anti-vibration mount of the first embodiment, and FIG. 2 is a response receptance at the time of reversing the grinding machine table.

16A is a response receptance at the time of hitting a grinding machine column when a non-voltage is applied when the damping force variable vibration isolation mount of the second embodiment is used, and FIG. 2 is a response receptance at the time of hitting a grinding machine column.

[Explanation of symbols]

 10 Damping force variable anti-vibration mount 12 Mount body (electrode) 12A Side wall (third part) 12B Top wall (first part) 16 Bottom lid (second part) 20 Liquid chamber 22 Bolt (connecting rod) 26 Vibration Plate 30 Electrode 31 Electrorheological Fluid 41 Orifice 42 Concrete Floor (Vibration Receiving Section) 44 Horizontal Square Angle Table Type Surface Grinding Machine (Vibration Generation Section) 94 Electrode 96 Orifice 108 Electrode 112 Electrode 116 Connecting Rod 118 Disk Electrode

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiaki Iwata 1-1-15-1, Mita, Tama-ku, Kawasaki-shi, Kanagawa 503-ton Tokyo factory

Claims (7)

[Claims] 1. A first part disposed between the vibration generating part and the vibration receiving part, contacting the vibration generating part, facing the first part at a predetermined interval and contacting the vibration receiving part. A mount body having a liquid chamber formed by a second portion and a frame-shaped third portion connecting the first portion and the second portion; and a viscosity filled by applying an electric field to the liquid chamber. A vibrating plate that divides the liquid chamber into two small liquid chambers substantially in a direction connecting the first portion and the second portion, the first portion and the A connecting rod that connects the vibrating plate, an orifice that connects the two small liquid chambers to each other, and at least a pair of electrodes that apply an electric field to the electrorheological fluid, and the first portion and the third portion Characterized in that at least one of the parts is elastically deformed Variable damping force anti-vibration mount. 2. The orifice is formed between the outer periphery of the diaphragm and the mount body, one of the pair of electrodes is provided on the outer periphery of the diaphragm, and the other is the one electrode of the mount body. The variable damping force anti-vibration mount according to claim 1, wherein the anti-vibration mount is provided in opposing portions. 3. The orifice is formed between the outer periphery of the diaphragm and the mount body, one of the pair of electrodes is provided in a portion of the diaphragm facing the small liquid chamber, and the other of the pair of electrodes is the mount. The variable damping force anti-vibration mount according to claim 1, wherein the one electrode of the main body is provided in a portion facing each other. 4. The damping according to claim 1, wherein the orifice is formed in a diaphragm, and the pair of electrodes are provided at a predetermined interval in the diaphragm so as to sandwich the orifice. Variable force anti-vibration mount. 5. The variable damping force antivibration mount according to claim 1, wherein two or more connecting rods are provided at a predetermined interval from each other. 6. The mount body is formed of a metal material,
6. The variable damping force antivibration mount according to claim 1, wherein at least one of the first portion and the third portion is formed thin and elastically deforms. 7. The variable damping force antivibration mount according to claim 1, wherein at least one of the first portion and the third portion is formed of an elastomer elastic body.