JPH0718466B2 - Vibration damping method and apparatus for vibrating body mounting apparatus - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping method for a mounting device that supports a vibrating body such as an engine, and a device therefor.

(Prior Art and Problems Thereof) Conventionally, regarding this type of apparatus, there are known conventional examples shown in FIGS. 11 to 13.

First of all, in Fig. 11 No. 61-191543, the rubber 100, fluid 1
01, actuator 102, crank angle sensor 103
The frequency is detected by a, and the oscillator 102 is excited by the exciting force of the actuator 102 to cause the fluid 101 to pulsate and attenuate the vibration.

However, since the excitation force of the actuator 102 is output without vibration damping evaluation, vibration damping may not be possible depending on the frequency. Since the exciting force of the actuator 102 is transmitted to the rubber 100 via the fluid 101, the damping performance is unstable.

Further, in JP-A-61-220923 of FIG. 12, the vibration of the engine 104 is damped by a sensor 106 fixed to the vehicle body 105, and the vibration is damped by a mount 107 that supports the engine 104 on the vehicle body 105. I can't.

Further, in JP-A-61-226327 of FIG. 13, rubber 108, fluid 1
09, an actuator 110 (electromagnetic force, air pressure, hydraulic pressure). Various sensors detect the operating state of the engine and actuate the actuator 110.

Also in this case, as in the case of FIG. 11, since the exciting force of the actuator 110 is output without vibration damping evaluation, vibration damping may not be possible depending on the frequency.

(Object of the Invention) The present invention provides a control method for a vibrating body mounting device, which is capable of damping vibration transmitted to a mounting device that mounts (supports) a vibrating body on a support body by a vibrating actuator incorporated in the mounting device. An object of the present invention is to provide a shaking method and a device therefor.

(Structure of the Invention) (1) Technical Means The first invention is a disc-shaped input plate 16 fixed to the vibrating body 10.
And a disc-shaped support plate 18 fixed to the lower support portion 12 that supports the vibrating body 10, the upper and lower ends of a cylindrical rubber 22 having a disc-shaped intermediate plate 20 fixed to the lower portion are fixed. The mount 14 is configured by, the upper end of the cylindrical leaf spring guide 28 is fixed to the support 26 fixed at the center of the lower surface of the input plate 16, and the cylindrical magnet 38 of the cylindrical magnet 38 is provided at the center of the lower surface of the support 26 in the leaf spring guide 28. The upper end is fixed, and the cylindrical magnet 38 has a bottomed hole 65 into which the magnet 38 is fitted with a gap and an outward flange 48 at the upper end, and a coil 34 for electromagnetic force generation is provided on the outer periphery below the outward flange 48. The small diameter screw 67 at the upper end is fitted into the screw hole at the center of the bottom wall 66 of the fixed steel vibrator 40, and the periphery is fixed to the lower surface of the leaf spring guide 28 by the bolt 46. Is attached to the lower surface of the bottom wall 66 so as to return the vibrator 40 to the initial position. A cylindrical permanent magnet 30 fixed to the inner surface of the cylindrical permanent magnet 30 and an annular yoke 32 for improving magnetic force fixed to the lower surface of the cylindrical permanent magnet 30. The plate spring mounting screw 42 is passed downward from the hole of the intermediate plate 20 and fixed to the intermediate plate 20 by the upper and lower nuts 43, and the vibration detector 52 facing the lower end surface of the plate spring mounting screw 42 is supported by the support plate 18. The vibration of the mount 14 is detected by the vibration detector 52, and the controller 54 calculates the vibration suppression signal 54a that can attenuate the vibration of the support plate 18 based on the detection signal 52a from the vibration detector 52. Then, the controller 54 detects the vibration so that the vibration actuator 24 built in the mount 14 is driven by the vibration suppression signal 54a and the vibration input to the input plate 16 is attenuated before the vibration is transmitted to the support plate 18. Digitally processes the detection signal 52a from the device 52 and Control signal 54 to the eta 24
This is a vibration suppression method for a vibrating body mounting device that selectively controls the size of a and the change of phase. The second invention is a vibrating body 10.
A disk-shaped intermediate plate 20 is fixed to the lower part between a disk-shaped input plate 16 fixed to the plate and a disk-shaped support plate 18 fixed to a lower support portion 12 supporting the vibrating body 10. The upper and lower ends of the cylindrical rubber 22 are fixed to form the mount 14, and the upper end of the cylindrical leaf spring guide 28 is fixed to the support 26 fixed to the center of the lower surface of the input plate 16, and the support inside the leaf spring guide 28 is fixed. The upper end of the cylindrical magnet 38 is fixed to the center part of the lower surface of the 26, the bottomed hole 65 into which the cylindrical magnet 38 is fitted with a gap, and the outward flange 48 at the upper end.
And a small-diameter screw 67 at the upper end is fitted into the central screw hole of the bottom wall 66 of the vibrator 40 made of steel with the coil 34 for electromagnetic force generation fixed to the outer periphery below the outward flange 48, Is provided with a leaf spring mounting screw 42 for fastening the inner peripheral portion of the leaf spring 44 fixed to the lower surface of the leaf spring guide 28 by the bolt 46 to the lower surface of the bottom wall 66 so as to return the oscillator 40 to the initial position, A bearing 36 in which the outer peripheral surface of the outward flange 48 is fitted to the inner surfaces of both the tubular permanent magnet 30 fixed to the lower surface of the support 26 surrounding the columnar magnet 38 and the annular magnetic force improving yoke 32 fixed to the lower surface thereof. To form the vibration actuator 24, pass the leaf spring mounting screw 42 downward from the hole of the intermediate plate 20 and fix it to the intermediate plate 20 with the upper and lower nuts 43 and face the lower end surface of the leaf spring mounting screw 42. The vibration detector 52 is fixed to the support plate 18 and the vibration input to the input plate 16 is not transmitted until it reaches the support plate 18. A vibration damping device of the vibrator mounting device designed to Decay.

(2) Action Based on the vibration data obtained from the vibration detector, the vibration actuator is operated so as to generate a vibration force having a phase opposite to the steady vibration on the support plate, and the vibration is damped.

(Embodiment) First, a mounting device according to the second invention will be described with reference to FIG.

In FIG. 1, reference numeral 10 denotes a vibrator such as an automobile engine. A mount 14 (Mount: a trapezoidal component on which an object is placed) for supporting the vibrating body 10 on the supporting portion 12 is provided between the vibrating body 10 and the supporting portion 12 which is a part of the body of the automobile. There is.

The mount 14 includes an input plate 16, a support plate 18, an intermediate plate 20, and a rubber 22.
(Rubber member) and the like, the cylindrical rubber 22 and the disc-shaped input plate 16, the support plate 18, and the intermediate plate 20 are fixed by welding, for example. The input plate 16 is fixed to the vibrating body 10, and the support plate 18 is fixed to the support portion 12.

Inside the mount 14, the vibration actuator 24 having the function of damping the vibration input to the input plate 16 of the mount 14 before the vibration is transmitted to the support plate 18 is incorporated. The vibration actuator 24 is interposed between the input plate 16 and the intermediate plate 20 as will be described later in detail, and the intermediate plate 20 is made of rubber.
It is connected to the support plate 18 via 22.

As shown in FIG. 2 showing the detailed structure of the vibration actuator 24, the vibration actuator 24 includes a support 26, a leaf spring guide 28, a magnet 30, a yoke 32, a coil 34, a bearing 36, a magnet 38,
The oscillator 40, a leaf spring mounting screw 42, a leaf spring 44, and the like are included.

The support 26 is a substantially disk-shaped steel member, and the upper surface of the support 26 is fixed to the center of the lower surface of the input plate 16 (FIG. 1) to support the entire vibration actuator 24 on the input plate 16. There is. A cylindrical plate spring guide 28 made of steel is fixed to the outer peripheral portion of the lower surface of the support 26, and a plate spring 44, which will be described in detail later, is fixed to the lower end surface of the plate spring guide 28 with bolts 46.

Inside the leaf spring guide 28, a magnet 30 made of a rare earth permanent magnet (Sm Co system), which is also cylindrical, is provided with its upper end fixed to the lower surface of the support 26. In addition, the magnet 30
A cylindrical magnet 38 is fixed to the inside of the position where the upper end portion is aligned with the axis of the support 26. This magnet 38 is also made of a rare earth permanent magnet (Sm Co type).

At the lower end of the magnet 38, a bottomed cylindrical vibrator 40 is provided slidably in the vertical direction. The oscillator 40 is made of steel. An annular flange 48 is integrally projected on the upper end of the oscillator 40, and a bearing 36 is interposed between the outer peripheral surface of the flange 48 and the inner peripheral surface of the magnet 30 and the yoke 32 fixed to the magnet 30. It is equipped. The bearing 36 is a cylindrical member made of Teflon resin, and the bearing 36 is fixed to the magnet 30 and the yoke 32.

A coil 34 for electromagnetic force generation is fixed to the outer peripheral portion of the oscillator 40, and the leaf spring 44 is screwed to the lower end surface of the oscillator 40 with a leaf spring mounting screw 42. It is made of strip-shaped spring steel having a curved portion 50 in the middle. Two leaf springs 44 are combined so that the leaf spring 44 has a substantially cross shape when viewed from below in FIG.

The leaf spring mounting screw 42 is fixed to the intermediate plate 20 so as to penetrate the central portion of the intermediate plate 20 and sandwich the intermediate plate 20 from above and below with two nuts 43 as shown in FIG.

Therefore, an annular magnetic force line circuit is formed around the magnet 30 and the yoke 32, and the vibrator 40 is vertically vibrated by the electromagnetic force generated when the coil 34 is excited. Further, since the flange 48 comes into contact with the bearing 36 and slides, the friction force generated between the flange 48 and the inner peripheral surface of the bearing 36 is small, and it is considered that the vibration force of the vibrator 40 is kept large. ing. Furthermore, since the curved portion 50 is formed in the leaf spring 44, the spring constant of the leaf spring 44 is small, and the magnitude of the spring constant can be set arbitrarily.

Next, a configuration for driving the vibration actuator 24 as described above will be described.

In FIG. 1, a vibration detector 52 is fixed to the central portion of the upper surface of the support plate 18, and the vibration detector 52 detects the acceleration of vibration of the support plate 18. The detection signal 52a from the vibration detector 52 is transmitted to the controller 54, and the controller 5
After being A / D converted by the A / D converter 56 of 4, digital signal processing was performed by the central processing circuit 58 (CPU) as described later in detail, and again D / A converted by the D / A converter 60. After damping signal 54
This is a structure that becomes a and is input to the power amplifier 62. The damping current 54b amplified by the power amplifier 62 is transferred to the coil 34 (second
(FIG. 2) and causes the vibrator 40 (FIG. 2) of the vibration actuator 24 to vibrate in the opposite phase of the vibration in the predetermined frequency range among the vibrations input to the input plate 16.

The digital signal processing process of the central processing circuit 58 will be described with reference to the flowchart of FIG. I.e. step
The signal processing is started in S1, the operation of the vibration actuator 24 (Fig. 1) is temporarily stopped in step S2, and then the step
At S3, the central processing circuit 58 samples the detection signal 52a from the vibration detector 52 (FIG. 1).

At this time, in the central processing circuit 58, it is determined in step S4 whether or not there is vibration of a frequency to be damped, which is prescribed in advance,
Go to step S5 (YES) or return to step S2 (N
O).

In step S5, the central processing circuit 58 detects one-sided amplitude of the vibration to be damped from the sampling data of the detection signal 52a.
Next, in step S6, the central processing circuit 58 creates vibration data for operating the vibration actuator 24 based on the one-sided amplitude of the vibration to be damped. In step S6, the gain correction is performed according to the vibration frequency.

Therefore, the magnitude of the output to the vibration actuator 24 is selected and determined in step S6.

In the next step S7, based on the sampling data of the detection signal 52a, the phase of the output data is selected and corrected so that the vibration characteristic of the vibration actuator 24 becomes the opposite phase of the vibration to be damped in the support plate 18. The vibration actuator 24
Operate.

Therefore, in this step S7, the vibration actuator
Selection of the phase of the output to 24 is made.

Finally, in step S8, it is determined whether or not the vibration input to the input plate 16 (Fig. 1) has changed, that is, the frequency has changed, and the frequency of the input plate 16 changes to change the damping condition. If (YES), the process returns to step S2. If the frequency of the input plate 16 does not change (NO), the process returns to step S7 again.
Further, the selection of the phase is repeated.

The flowchart shown in FIG. 3 has the following features.

1) Digitally process the sampling data.

2) Selectively control the change in the magnitude and phase of the output to the vibration actuator 24.

However, when the frequency of the vibration input to the support plate 18 of the mount 14 changes, the problem of returning to the beginning of the control program and redoing the control remains.

Next, the operation will be described. In the experiment using the above mounting device, mount the sine wave vibration of 200Hz to 220Hz.
When the input is applied to the input plate 16 (see FIG. 1) of FIG. 4, when the vibration actuator 24 is not operated, the magnitude as shown by the characteristic X1 in FIG. The support plate 18 (FIG. 1) vibrates due to the corrugated shape.

From this state, move the vibration actuator 24 to the controller 54
When the vibration is evaluated while being actuated, the characteristic X1 shows that the characteristic X1 begins to damp at time t1 when the vibration actuator 24 starts outputting, as shown by the characteristic X2, and damps at time t2. Is completed, and the waveform becomes the characteristic X3 after the time t2.

As shown in FIG. 6, the characteristic X3 after the time t2 is smaller than the characteristic X1 of FIG.
The vibration input to is damped.

Furthermore, when the frequency of the input vibration is changed, as shown in FIG. 7, the frequency of the vibration input to the input plate 16 is changed to 21
At time t4 after changing from 0Hz to 205Hz, characteristic X3 is characteristic X4
As described above, a growling phenomenon occurs, and the phenomenon in which the acceleration α increases at the point P1 and the acceleration α decreases at the point P2 periodically occurs. After stopping the vibration actuator 24 at time t5, the characteristic returns to the original characteristic X1.

Therefore, when the input frequency changes, the problem that the characteristic X4 occurs and ends in the signal processing process shown in FIG. 3 remains, but it is shown in FIGS. 8 to 10 as described below. It is possible to prevent the occurrence of each signal processing process characteristic X4.

In the flowchart of FIG. 8, if YES in step S8, the process proceeds to step S10, the changed frequency of the input vibration is detected by the vibration detector 52, and in step S11 the controller 54
The central processing circuit 58 rewrites the output data.

In the flowchart of FIG. 8, in order to solve the problem of FIG. 7, a function of rewriting the output data when the frequency of vibration changes is added to FIG.

However, since the selective control is performed, the damping effect is limited.

Further, in the flowchart of FIG. 9, in the case of NO in step S8, the process proceeds to step S12, and it is determined whether or not the one-sided amplitude of the output data is optimal. If not, the frequency of the output data is determined in step S13. While maintaining constant, rewrite only one amplitude.

The flowchart of FIG. 9 has the following features.

1) Digitally process the sampling data.

2) Optimum control of changes in the magnitude and phase of the output to the vibration actuator 24.

However, after the vibration
The processing time until the 24 is activated becomes longer, and the response of vibration suppression becomes slower.

Further, as shown in FIG. 10, instead of selecting the absolute value of the output of the vibration actuator 24 in steps S5 and S6,
Perform the following processing. In step S14, the controller 54 stores in advance the frequency and the initial value of the optimum value of the output data corresponding thereto in the form of a table (data chart). In steps S11 and S13, the frequency and the output data have the optimum values. It is rewritten for each output so that. Therefore,
For the output to the vibration actuator 24, the optimum frequency and one-sided amplitude as output data can be selected from this table according to the detected frequency.

The flowchart of FIG. 10 differs from the flowchart of FIG. 9 in that the frequency of the vibration input to the support plate 18 of the mount 14 is detected and the preset output data is selected from the detected frequency. is there.

In the case of FIG. 9 and FIG. 10, if there is any correlation between the frequency that can be detected by the vibrating body 10 that is the vibration source and the frequency that can be detected by the vibration detector 52, they are mutually compatible. It should be possible.

Further, when optimizing the phase of the output to the vibration actuator 24 and rewriting the output data, the detection signal 52a from the vibration detector 52 is always used.

By the signal processing process shown in FIGS. 8 to 10, the roaring phenomenon like the characteristic X4 in FIG. 7 is prevented.

Next, the damping method for the mounting device according to the first aspect of the present invention will be described in terms of items.

1) Stop the operation of the vibration actuator 24 before starting the vibration damping operation.

2) The vibration detector 52 detects the vibration transmitted from the input plate 16 to the support plate 18, and inputs it to the controller 54.

3) The central processing circuit 58 of the controller 54 processes the sampling data into a digital signal and converts the characteristic X1 shown in FIG.
An anti-phase damping signal 54a that can be attenuated is calculated.

4) The damping signal 54a is amplified by the power amplifier 62, and the damping current 54b
The coil 34 of the vibration actuator 24 (Fig. 1) (second
Enter the figure).

5) Operate the vibration actuator 24 with the damping current 54b,
Before the vibration of the vibrating body 10 input to the input plate 16 is transmitted to the support plate 18 via the rubber 22, the vibration force of the vibration actuator 24 input to the intermediate plate 20 causes the vibration of the characteristic X3 of FIG. To dampen.

6) If the above damping methods are not enough,
The signal processing process of steps S10 to S14 in the figure is added.

Both of the above inventions have the following features.

1) A vibrating body mounting device having a vibrating actuator 24 incorporated therein.

2) The vibration actuator 24 is a small and powerful electromagnetic vibrator. The structure of the vibration actuator 24 is characterized in that a magnetic circuit is formed by a rare earth permanent magnet, a coil movable vibration actuator 24, and a support portion of the vibrator 40.

3) The vibration detection method is characterized in that the vibration acceleration of the support plate 18, which is the output end of the mount 14, is detected.

4) In the control method of the vibration actuator 24, the vibration acceleration of the support plate 18 in the steady vibration state is digitally sampled. Excitation actuator from sampling data
By generating the output data for operating 24, the vibration acceleration of the support plate 18 is fed back to correct the phase of the output data so that the support plate 18 vibrates in the opposite phase of the steady vibration state. Activate 24.

(Effects of the Invention) As described above, in the vibration damping method and apparatus for a vibrating body mounting apparatus according to the present invention, the vibration detector 52 of the mount 14 is connected to the controller 54, and the vibration acceleration of the support plate 18 in the steady vibration state is increased. Is sampled and digitally processed by the controller 54 to create a damping current 54b for operating the vibration actuator 24, and the vibration current 54b is output to the vibration actuator 24 built into the mount 14 so that the vibration actuator 24 The coil 34 of the
The vibration detector 52 is configured so that the vibration force generated in the vibrator 40 can be transmitted to the support plate 18 of the mount 14 and the vibration of the support plate 18 can be damped like the characteristic X3 in FIG. From the detection signal 52a (vibration acceleration information) obtained from the controller 5
It is possible to output the vibration suppression signal 54a and the vibration suppression current 54b that operate the vibration actuator 24 so as to have the opposite phase of the steady vibration input in 4.

Therefore, the vibration component in the predetermined frequency range of the vibration input from the vibrating body 10 to the mount 14 is canceled by the vibration force of the vibration actuator 24 driven by the vibration suppression current 54b, and the vibration component of FIG. It is possible to damp the vibration of the support plate 18 as indicated by the characteristic X3.

Furthermore, in the vibration actuator 24, the cylindrical magnet 30 is provided around the cylindrical magnet 38, and the yoke 32 is provided in the magnet 30, so that the vibration actuator 24 can generate a strong magnetic force.
It is possible to provide a vibration actuator 24 that can be miniaturized and is suitable for being incorporated in the mount 14.

Further, when the vibrator 40 is axially supported by the Teflon bearing 36, the frictional force generated in the bearing 36 is reduced, and the vibration force of the vibrator 40 can be efficiently transmitted to a part of the mount 14.

When the curved portion 50 is provided at the intermediate portion of the leaf spring 44, the spring force of the leaf spring 44 can be adjusted appropriately at the curved portion.

A magnetic field is formed in the direction perpendicular to the coil 34 of the electromagnet by the arrangement of the columnar magnet 38, the cylindrical permanent magnet 30 surrounding the magnet 38, and the yoke 32 serving as the electromagnet, and a strong electromagnetic force is generated. Permanent magnet
The frequency range is not limited in the vibration actuator 24 composed of 30 and electromagnets (yoke 32, coil 34). Further, it is not necessary to detect the rotation speed.

(Other Embodiments) (1) The present invention is not limited to the reduction of engine vibration of an automobile, but can be applied to vibration damping of any other vibrating body.

(2) Further, the signal processing process by the controller 54 is not limited to the process shown in FIG. 3 and FIGS. 8 to 10, and the exciting actuator 24 is caused to generate an exciting force of the opposite phase of the characteristic X1. Other signal processing processes may also be used.

[Brief description of drawings]

FIG. 1 is a structural schematic diagram showing a mounting device adopting the second invention, FIG. 2 is a vertical sectional view of a vibration actuator adopting the third invention, and FIG. 3 is a flow chart showing a first signal processing process. 4, 5, 6, and 7 are respectively graphs of time-support plate acceleration, FIG. 8 is a flowchart showing the second signal processing process, and FIG. 9 is the third.
10 is a flowchart showing the signal processing process of FIG. 10, FIG. 10 is a flowchart showing the fourth signal processing process, FIG.
FIG. 12 and FIG. 13 are schematic structural views showing different conventional examples. 10 …… Vibrator, 12 …… Supporting part, 14 …… Mount,
16 ... Input plate, 18 ... Support plate, 20 ... Intermediate plate, 22 ... Rubber, 24 ... Excitation actuator, 34 ... Coil, 36 ...
Bearings, 40 ... Oscillator, 44 ... Leaf spring, 52 ... Vibration detector, 54 ... Controller, 62 ... Power amplifier

Claims (2)

[Claims] 1. A disc-shaped input plate (16) fixed to a vibrating body (10) and a lower support (12) for supporting the vibrating body (10).
The mount (14) is formed by fixing the upper and lower ends of the cylindrical rubber (22) having the disk-shaped intermediate plate (20) fixed to the lower part between the disk-shaped support plate (18) fixed to the Then, the upper end of the cylindrical leaf spring guide (28) is fixed to the support (26) fixed to the center of the lower surface of the input plate (16), and the central portion of the lower surface of the support (26) in the leaf spring guide (28) is fixed. The cylindrical magnet (38) is fixed at its upper end, has a bottomed hole (65) into which the cylindrical magnet (38) is fitted with a gap, and has an outward flange (48) at the upper end. The small diameter screw (67) at the upper end is fitted into the central screw hole of the bottom wall (66) of the steel vibrator (40) with the coil (34) for electromagnetic force fixed to the outer circumference below the (48). , The inner periphery of the leaf spring (44) whose periphery is fixed to the lower surface of the leaf spring guide (28) by the bolt (46) is placed on the lower surface of the bottom wall (66) so as to return the vibrator (40) to the initial position. Fasten Support (26) that has a leaf spring mounting screw (42) that surrounds the cylindrical magnet (38)
The bearing (36) in which the outer peripheral surface of the outward flange (48) is fitted to the inner surfaces of both the cylindrical permanent magnet (30) fixed to the lower surface of the and the annular magnetic field enhancing yoke (32) fixed to the lower surface. ) Is fixed to form the vibration actuator (24), the leaf spring mounting screw (42) is passed downward through the hole of the intermediate plate (20), and fixed to the intermediate plate (20) by the upper and lower nuts (43). , The vibration detector (52) facing the lower end surface of the leaf spring mounting screw (42) is fixed to the support plate (18), and the vibration of the mount (14) is detected by the vibration detector (52). Based on the detection signal (52a) from the device (52), the controller (54) calculates the vibration suppression signal (54a) that can attenuate the vibration of the support plate (18), and mounts it with the vibration suppression signal (54a). By driving the vibration actuator (24) built in (14), the vibration input to the input plate (16) is transmitted to the support plate (18). To attenuate the dynamic controller (54), the magnitude of the detection signal from the vibration detector (52) and (52a) to digital processing, and the vibrating damping signal to the actuator (24) (54a),
A vibration suppression method for a vibrating body mounting device that selectively controls phase changes. 2. A disc-shaped input plate (16) fixed to the vibrating body (10), and a lower support part (12) for supporting the vibrating body (10).
The mount (14) is formed by fixing the upper and lower ends of the cylindrical rubber (22) having the disk-shaped intermediate plate (20) fixed to the lower part between the disk-shaped support plate (18) fixed to the Then, the upper end of the cylindrical leaf spring guide (28) is fixed to the support (26) fixed to the center of the lower surface of the input plate (16), and the central portion of the lower surface of the support (26) in the leaf spring guide (28) is fixed. The cylindrical magnet (38) is fixed at its upper end, has a bottomed hole (65) into which the cylindrical magnet (38) is fitted with a gap, and has an outward flange (48) at the upper end. The small diameter screw (67) at the upper end is fitted into the central screw hole of the bottom wall (66) of the steel vibrator (40) with the coil (34) for electromagnetic force fixed to the outer circumference below the (48). , The inner periphery of the leaf spring (44) whose periphery is fixed to the lower surface of the leaf spring guide (28) by the bolt (46) is placed on the lower surface of the bottom wall (66) so as to return the vibrator (40) to the initial position. Fasten Support (26) that has a leaf spring mounting screw (42) that surrounds the cylindrical magnet (38)
The bearing (36) in which the outer peripheral surface of the outward flange (48) is fitted to the inner surfaces of both the cylindrical permanent magnet (30) fixed to the lower surface of the and the annular magnetic field enhancing yoke (32) fixed to the lower surface. ) Is fixed to form the vibration actuator (24), the leaf spring mounting screw (42) is passed downward through the hole of the intermediate plate (20), and fixed to the intermediate plate (20) by the upper and lower nuts (43). By fixing the vibration detector (52) facing the lower end surface of the leaf spring mounting screw (42) to the support plate (18), the vibration input to the input plate (16) is transmitted to the support plate (18). A vibration damping device for a vibrating body mounting device that damps vibrations.