JPH05346136A - Vibration proof device - Google Patents

Abstract

PURPOSE:To reduce the vibration from a vibration generating part by making a displacement of a vibration proof member having a large mass within a vibration proof device. CONSTITUTION:A storing body 50 is mounted between a rubber 16 and a top plate 18, and a vibration proof member 54 is positioned within a space partitioned between the top plate 18 and the storing body 50 through a supporting member 52. A core 48 and a coil 46 wound around the core 48 are fixed to the storing body 50 adjacent to the vibration proof member 54 to the lower side of the vibration proof member 54. The coil 46 is connected to the power source 40 through wiring 60, 61, and a controller 38 controls the power source 40 by the signal from sensors 56, 58. Thus, the vibration level is reduced by making a displacement of the vibration proof member 54 in the reverse direction to that of the vibration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device applied to prevent transmission of vibrations from an engine mounted on a vehicle, and to a mount for supporting members that generate vibrations. It is applicable.

[0002]

2. Description of the Related Art For example, a vehicle is provided with an anti-vibration device as an engine mount between an engine which is a vibration generating part and a vehicle body which is a vibration receiving part. The vibration device absorbs the vibration and prevents the vibration from being transmitted to the vehicle body.

That is, as the vibration isolator, an elastic body and a pair of liquid chambers are provided inside the body of the vibration isolator, and
It is known that these liquid chambers are communicated with each other through a restricted passage serving as an orifice. Then, when the mounted engine operates to generate vibration, the vibration is absorbed by the damping function of the elastic body and the viscous resistance of the liquid in the orifice that connects these liquid chambers, and the vibration is transmitted. It is designed to prevent this (JP-A 61-189341).

Vibrations generated by the engine include so-called shake vibration (for example, a frequency of less than 15 Hz) generated when the vehicle is traveling at a speed of 70 km / hour or more, or when the vehicle is idle and the vehicle travels at a speed of about 5 km / hour. In addition to low-frequency vibrations such as so-called idle vibrations (for example, a frequency of 20 to 40Hz) that occur when the vehicle is running, high-frequency vibrations that cause a muffled noise that occurs when the vehicle runs at medium to high speeds (for example, , Frequency 80Hz or more)
Therefore, the vibration isolator having the conventional structure is not sufficient to reduce the vibration in all of these ranges.

[0005]

As described above, in the conventional vibration isolator, vibrations in a wide range of frequencies are not sufficiently reduced, and large vibrations are transmitted to the vibration receiving portion side depending on the frequencies. Will have drawbacks.

In consideration of the above facts, the present invention installs a vibration isolator inside and imparts a displacement to the vibration isolator so that the vibration transmitted to the vibration receiving portion side is reduced, and the vibration isolating characteristic is obtained. It is an object of the present invention to provide a vibration isolation device that can improve the vibration resistance.

[0007]

According to a first aspect of the present invention, there is provided a vibration isolation device, which is connected to one of a vibration generating portion and a vibration receiving portion, and to the other of the vibration generating portion and the vibration receiving portion. A second mounting member, an elastic body interposed between the first mounting member and the second mounting member, and displaceably mounted on any one of the mounting members, A vibration damping material having a mass sufficient to reduce vibration,
Displacement imparting means located adjacent to the vibration isolator and displacing the vibration isolator, and at least one of the vibration generator side and the vibration receiver side installed to prevent vibration of the vibration generator or the vibration receiver. It is characterized by comprising a sensor for detecting, and a displacement applying means and a controller connected to the sensor and controlling the operation of the displacement applying means based on a signal from the sensor.

According to a second aspect of the present invention, there is provided a vibration isolator comprising: a first mounting member connected to one of the vibration generating section and the vibration receiving section; and a second mounting member connected to the other of the vibration generating section and the vibration receiving section. An elastic body interposed between the first mounting member and the second mounting member and mounted, and displaceably mounted on any one of the mounting members and only reducing vibration from the vibration generating section. A vibration damping material having a mass and having a displacement imparting means for generating displacement with respect to any one of the mounting members,
A sensor that is installed on at least the vibration generating portion side or the vibration receiving portion side and that detects the vibration of the vibration generating portion or the vibration receiving portion, and the displacement applying means and the operation of the displacement applying means connected to the sensor. It has a control part which controls based on the signal from the said sensor, It is characterized by the above-mentioned.

[0009]

The elastic body is interposed between the first mounting member and the second mounting member, and the vibration isolator is displaceably mounted between any one of these members and the elastic body. Also,
In the first aspect, the displacement imparting means is located adjacent to the vibration isolator, and in the second aspect, the vibration isolator has the displacement imparting means. The sensor is installed at least on either the vibration generating unit side or the vibration receiving unit side, and the control unit is connected to the displacement applying unit and the sensor.

As described above, when the vibration is transmitted from the vibration generating portion side connected to one of the mounting members, the elastic body is deformed and the elastic body damps the vibration. Further, the sensor detects the vibration of the vibration generating section or the vibration receiving section, and controls the operation of the displacement applying means based on the detection signal of this sensor. Therefore, in order to reduce the vibration by the displacement applying means, for example, the vibration isolator is displaced in a phase opposite to the phase of the vibration, and as a result, the vibration is opposed by the mass of the vibration isolator and the acceleration at the time of displacement. A force is generated to prevent transmission of vibration to the vibration receiving portion side.

According to the second aspect of the present invention, since the vibration isolator has the displacement imparting means in addition to the above-mentioned action, the displacement imparting means vibrates together with the vibration isolator, and the mass of the displacement imparting means is increased. Also, the transmission of vibration is prevented by utilizing the.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of a vibration isolator according to the present invention is shown in FIG. 1, and the first embodiment will be explained based on this drawing.

As shown in FIG. 1 which is a sectional view of the present embodiment, the bottom of the bottom plate 10 which is the first mounting member forming the lower side of the vibration isolator 80 is attached to the vehicle body 62 at the bottom center thereof. The bolt 12 for connecting and fixing the main body 79 of the device 80 by screwing the nut 64 is projected. Around the bottom plate 10 is a standing wall 10A, and a support plate 14 is attached to the upper end portion thereof. The support plate 14 has a disk-shaped flange portion 14A whose outer peripheral end is caulked and fixed to the standing wall 10A.
A tubular portion 14B is erected at a right angle from the inner peripheral portion of A, and a support tubular portion 14C that extends in a tapered shape is continuous from the upper end portion of the tubular portion 14B.

The outer peripheral surface of a rubber 16 which is a cylindrical elastic body is vulcanized and adhered to the inner peripheral surface of the support cylindrical portion 14C, and the inner peripheral surface of the rubber 16 forms a disk-shaped space. This container 50 is vulcanized and adhered to the container 50 inside.
From the upper part of the annular portion 50B forming the side surface of the flange portion 50C, the flange portion 50C projects to the outer peripheral side over the entire circumference. Then, the top plate 18 serving as a second mounting member located above the storage body 50 is caulked to the flange portion 50C, and the top plate 18 is fixed to the upper portion of the storage body 50. Therefore, the rubber 16 is attached so as to be interposed between the top plate 18 and the bottom plate 10, and the storage body 50 is attached between the rubber 16 and the top plate 18. Further, the bolt 20 protruding from the central portion of the top plate 18 is used for connecting to the engine holding base 66, and the engine is fixed by screwing the nut 68.

In addition, in the space inside the storage body 50 which is a space partitioned between the storage body 50 and the top plate 18, the storage body 50 is
Disc-shaped iron core 4 fixed to the bottom part 50A of the sheet with an adhesive or the like
8 is located in the ring-shaped groove of the iron core 48,
The coil 46 is wound. Wirings 60 and 61 connected to the power supply 40 are provided from both ends of the coil 46, respectively.
Is extended so that current can be supplied from the power supply 40 to the coil 46.

Further, inside the housing 50, on the upper side of the iron core 48, a ring-shaped support member 52 which is a rubber elastic member whose outer peripheral side is vulcanized and adhered to the sleeve 53 all around, and a support member. The disk-shaped vibration isolator 54, in which the inner circumference side of 52 is vulcanized and adhered over the entire circumference, is the annular portion 5 of the storage body 50.
The sleeve 53 is arranged by press-fitting the sleeve 53 on the inner wall surface of 0B. The vibration isolator 54 is formed of a member such as steel that is attracted by a magnetic force, and has a volume sufficient to reduce vibrations from the engine. That is, the vibration isolator 54 is displaceably attached between the top plate 18 and the rubber 16, and the coil 46 and the iron core 48, which serve as displacement imparting means, are adjacent to the vibration isolator 54 so as to displace the vibration isolator 54. Is located.

As described above, the coil 46 and the iron core 48 form or eliminate the magnetic field, and the vibrations in the opposite phase to the vibrations generated on the engine side are accommodated by the attraction to the iron core 48 side and the withdrawal by the support member 52. Anti-vibration material 5 in the body 50
4 as a result, and as a result, the storage body 50
Even when the vibration from the engine side is transmitted to
The vibration isolator 54 pulls the container 50 through the support member 52 in the direction opposite to the displacement direction of the vibration, so that the amplitude of the container 50 can be reduced.

On the other hand, the first acceleration sensor 56 is fixed to the engine holding base 66 by screwing or the like, and the second acceleration sensor 58 is fixed to the vehicle body 62 by screwing or the like. The vibration of the engine and the vibration of the vehicle body 62 can be respectively detected. The acceleration sensors 56 and 58 are connected to a controller 38, which is a control unit, via an amplifier 36 that amplifies an acceleration detection signal. The controller 38 is connected to a power source 40 of a coil 46, 38 controls the voltage and current applied to the coil 46 from the power supply 40.

On the other hand, the flange portion 14A together with the standing wall 10A
A liquid chamber 26 formed by the inner wall surfaces of these members is provided between the diaphragm 22, which is the other elastic body that is caulked and fixed, and the support plate 14 and the rubber 16, and for example, water, Liquid such as oil is enclosed. A partition plate 28 is arranged in the liquid chamber 26, and divides the liquid chamber 26 into a pair of liquid chambers, that is, an upper liquid chamber 26A and a lower liquid chamber 26B.

Further, the partition plate 28 has a flat plate portion 28A formed in a flat plate shape at the central portion thereof, and the outer peripheral end 28C, which is the outer peripheral surface of the flat plate portion 28A, has an outer peripheral end. An orifice 29, which serves as a passage, is formed along the portion 28C for almost one round. The partition plate 28 is integrally formed of synthetic resin, metal such as aluminum,
It can be manufactured.

Further, a small hole 32 which communicates the upper liquid chamber 26A with the inside of the orifice 29 is formed at one end of the orifice 29, and the lower liquid chamber 26B communicates with the inside of the orifice 29 at the other end. A small hole 34 is formed. Therefore, the orifice 29 and the small holes 32 and 34 communicate between the upper liquid chamber 26A and the lower liquid chamber 26B.

The lower portion of the outer peripheral edge portion 28C projects outward, and is brought into contact with the bottom surface of the flange portion 14A,
The flange portion 14A together with the standing wall 10A and the diaphragm 22
It is firmly fixed by crimping. Further, an air chamber 35 is formed between the diaphragm 22 and the bottom wall 10 to form the diaphragm 22.
It is possible to transform.

Further, at the time of assembly, the partition plate 28 is inserted into the support plate 14, and the partition plate 28 together with the bottom plate 10 are inserted.
The assembly is completed by caulking and fixing to the support plate 14, but it is also possible to use an attaching means such as an adhesive or a bolt for attaching the partition plate 28, if necessary.

Next, the operation of this embodiment will be described. Top plate 18
When the engine mounted on the vehicle operates, the vibration of the engine is transmitted to the rubber 16 via the top plate 18 and the housing 50. The rubber 16 acts mainly as a vibration absorber, and can absorb the vibration by the vibration damping function based on the internal friction of the rubber 16. Further, the liquid in the upper liquid chamber 26A and the liquid in the lower liquid chamber 26B mutually flow through the orifice 29, and the vibration damping effect can be improved by the damping action based on the viscous resistance of the liquid flow generated in the orifice space. On the other hand, this orifice 2
Since the space 9 is arranged adjacent to the inner periphery of the support plate 14, its turning radius is large, and therefore the axial length is long, and a large damping can be obtained. Furthermore, this orifice 2
Since the partition plate 28 forming 9 has a small cross-sectional area, the volume of the liquid chamber 26 is not reduced.

Further, the acceleration sensor 56 detects the vibration of the engine in the form of acceleration, and the detected value is defined as the acceleration α1. The amplifier 36 gives a predetermined gain -A to the acceleration α1 to obtain -Aα1.
The power supply 40 applies a voltage proportional to α 1 to the coil 46. Thereafter, the acceleration sensor 58 also detects the vibration of the vehicle body 62 in the form of acceleration, and the detected value is the acceleration α2.
As a result, feedback is applied to the amplifier 36 so that the acceleration α2 approaches 0. Then, the value of the gain-A is changed, and the controller 38 controls the voltage applied to the coil 46 based on the changed new gain value. Furthermore, the flow of the above description will be repeated.

That is, a magnetic field is formed on the basis of the current flowing through the coil 46 to magnetize the iron core 48, and the vibration damping material 54 is attracted and brought closer by the magnetization of the iron core 48. When the magnetization of the iron core 48 disappears, the elasticity of the support member 52 causes the vibration isolator 5 to move.
4 will be pulled back upward in the figure. Therefore, when the power source 40 is controlled so that the vibration isolator 54 vibrates in a phase opposite to the vibration of the holding table 66 detected by the acceleration sensor 56, the vibration of the container 50 vibrating together with the holding table 66 is reduced. .. As a result, even if the orifice 29 that can only reduce the narrow frequency range is clogged, the vibration can be reduced.

As described above, since the vibration isolator 54, which is displaced by the current applied to the coil 46 in response to the vibration, is provided inside, for example, shake vibration, idle vibration, etc. are compared with the conventional vibration isolator. Corresponding to the vibration of a wide range of frequencies from the low frequency vibration to the high frequency vibration that causes the muffled sound, it is possible to reduce the vibration with a small power consumption of the current flowing through the coil 46.

Next, a second embodiment of the vibration isolator according to the present invention is shown in FIGS. 2 and 3, and the second embodiment will be described based on these drawings. The same members as those used in the first embodiment are designated by the same reference numerals, and a duplicate description will be omitted.

As shown in FIG. 2 which is a sectional view of the present embodiment, the space inside the storage body 50, which is a space partitioned between the storage body 50 and the top plate 18 of the vibration isolator 100, is stored. A disk-shaped iron core 72 fixed with an adhesive or the like is located on the bottom portion 50A of the body 50, and a coil 82 is wound around the iron core 72. Wirings 60 and 61 respectively connected to the power source 40 extend from both ends of the coil 82,
A current can be supplied from the power supply 40 to the coil 82.

Further, inside the housing 50, on the outer peripheral side of the iron core 72, a ring-shaped elastic body made of rubber is adhered to the inner wall surface of the annular portion 50B of the housing 50 by vulcanization bonding over the entire circumference. The support member 92 is located, and a disc-shaped vibration isolator 94 vulcanized and adhered to the inner peripheral side and the entire circumference of the support member 92 is disposed inside the support member 92. This anti-vibration material 94
Positioned to cover the iron core 72 and the coil 82,
A recess 94A is formed on the surface facing the iron core 72 side,
The iron core 72 and the coil 82 are fitted in the recess 94A. The vibration isolator 94 is formed of a member such as steel that is attracted by a magnetic force, and has a volume sufficient to have a sufficient mass. As a result, the iron core 72 and the coil 8
2 is an actuator 96 which is a displacement imparting means in the Z-axis direction for vibrating the vibration isolator 94 in the vertical direction in FIG.

On the other hand, as shown in FIGS. 2 and 3, on the inner wall surface of the annular portion 50B, so as to cover the periphery of the vibration isolator 94,
Four iron cores 74A, 74B, 76A, 76B, which are located at equal intervals of 90 degrees from each other, are fixed to each other with an adhesive or the like, and the coils 84A, 84B, 86A, 86B are attached to these iron cores 74A, 74B, 76A, 76B. Is wrapped around. From both ends of these coils 84A, 84B, 86A, 86B, wires (not shown) extend to the power supply 40, respectively, and the coils 84A, 84B, 86A,
Current can be supplied to 86B. Then, the pair of iron cores 7 that are opposed to each other with the central portion of the vibration isolator 94 interposed therebetween.
4A and 74B and the pair of coils 84A and 84B are shown in FIG.
The upper part serves as an actuator 97 in the X-axis direction that vibrates the vibration isolator 94 in the left-right direction. Further, a pair of iron cores 76A and 76B and a pair of coils 86A and 86B, which also face each other across the center of the vibration isolator 94, and a pair of coils 86A and 86B, are shown in FIG. Become.

From the above, these X, Y, and
With the Z-axis actuators 96, 97, 98, the vibration-proof material 94
Can be vibrated in either direction.

Therefore, a magnetic field is formed or eliminated by the coil 82 and the iron core 72, and vibration having a phase opposite to that of the vibration generated on the engine side is attracted to the iron core 72 side and pulled back by the support member 92, so that the container is stored. Anti-vibration material 94 within 50
As a result, even when the vibration from the engine side in the Z-axis direction is transmitted to the storage body 50, the vibration isolator 94 is responsive to the displacement direction of the vibration via the support member 92. By pulling the container 50 in the opposite direction, the amplitude of the container 50 can be reduced. Similarly, even when vibration from the engine side in the X-axis direction is transmitted to the container 50 by the pair of coils 84A and 84B and the pair of iron cores 74A and 74B, the vibration isolator 94 vibrates via the support material 92. By pulling the storage body 50 in the direction opposite to the displacement direction, the amplitude of the storage body 50 can be reduced. Further, the pair of coils 86A and 86B and the pair of iron cores 7
Even when vibrations from the engine side in the Y-axis direction are transmitted to the storage body 50 by the 6A and 76B, the vibration-proof material 94
Pulls the container 50 in the direction opposite to the displacement direction of the vibration via the support member 92, and the amplitude of the container 50 can be reduced.

From the above, X, Y, and
Since it has the vibration-proof material 94 that is displaced in the Z-axis direction, it can handle vibrations in a wide range of frequencies, for example, from shake vibration to idle vibration, in the X-, Y-, and Z-axis directions as compared with the conventional vibration-damping device. It has become possible to reduce the vibration of. Needless to say, the acceleration sensors 56 and 58 at this time can detect accelerations in the X, Y, and Z axis directions.

Next, a third embodiment of the vibration isolator according to the present invention is shown in FIG. 4, and a second embodiment will be described based on this drawing.
The same members as those used in the first embodiment are designated by the same reference numerals, and a duplicate description will be omitted.

As shown in FIG. 4 which is a sectional view of the present embodiment, the space inside the storage body 50, which is a space partitioned between the storage body 50 of the vibration isolator 120 and the top plate 18, is stored. A disk-shaped case 102 fixed to the inner wall surface of the body 50 with an adhesive or the like is located, and a coil 112 is wound between the protrusions located near the outer circumference of the case 102.
Wirings 60 and 61 respectively connected to the power source 40 extend from both ends of the coil 112 so that current can be supplied from the power source 40 to the coil 112.

Further, inside the container 50, a ring-shaped support member 104, which is an elastic member made of rubber, is located, which is vulcanized and adhered to the inner wall surface of the annular portion 50B of the container 50 along the entire circumference thereof. The disk-shaped vibration-damping material 114 in which the inner peripheral side of the support material 104 is vulcanized and adhered over the entire circumference is the case
It is arranged so as to be located on the inner peripheral side. The anti-vibration material 114 is a disk-shaped magnet 116, and a disk-shaped steel plate 118 that is located above the magnet 116 and is bonded to the magnet 116.
Further, the magnet 116 and the steel plate 118 are formed by a tubular steel tube 110 having a bottom portion adhered thereto. And the vibration damping material 1
14 has a volume sufficient to have sufficient mass.
That is, the vibration isolator 114 is displaceably attached between the top plate 18 and the rubber 16, and the coil 112 and the case 102, which serve as displacement imparting means, are positioned adjacent to the vibration isolator 114. As a result, the magnetic field formed by the coil 112 vibrates the vibration isolator 114 in the vertical direction in FIG.

Therefore, by reversing the magnetic field formed by the coil 112 forward and backward, vibration having a phase opposite to that of the vibration generated on the engine side is attracted and repelled by the coil 112 and pulled back by the support member 104, so that the container 50 is received. Anti-vibration material 1
14, and as a result, the storage body 5
Even when the vibration from the engine side is transmitted to 0, the vibration isolator 114 pulls the storage body 50 through the support member 104 in the direction opposite to the displacement direction of the vibration, and the storage body 50 The amplitude can be reduced. At this time, since the outer surface of the steel cylinder 110 of the vibration isolator 114 is always magnetized by the magnet 116, when the coil 112 is magnetized,
When a displacement similar to that of the first embodiment is obtained with a small magnetic field and the magnetization of the coil 112 disappears, the position of the vibration isolator 114 is maintained at the position shown in FIG. 4 by the support of the support member 104. In addition, in this embodiment, the magnet 116 is replaced by the steel plate 118.
Although the steel cylinder 110 and the steel cylinder 110 are sandwiched together, they may be integrally formed with a magnet.

Next, a fourth embodiment of the vibration isolator according to the present invention is shown in FIG. 5, and the fourth embodiment will be explained based on this drawing.
The same members as those used in the first embodiment are designated by the same reference numerals, and a duplicate description will be omitted.

As shown in FIG. 5 which is a sectional view of the present embodiment, a cylindrical space is formed in the storage body 50 which is a space partitioned between the storage body 50 of the vibration isolator 130 and the top plate 18. The vibration-proof material 122 in a shape is located. This anti-vibration material 122
Is formed of a member such as steel, and has a volume sufficient to reduce vibrations from the engine. On the bottom side of the vibration isolator 122, the cylindrical hole 1
22A is formed, and the concave fitting portion 1 is formed in the inner part of the hole 122A.
22B is formed. The bottom 50A of the container 50 is formed into a disc shape and is applied with a voltage to cause the operation of the bottom 50A of FIG.
A piezoelectric material 126, which is a displacement imparting means in which a plurality of piezoelectric elements 124 that expand and contract in the vertical direction are arranged and adhered to each other, is fixed with an adhesive or the like, and the upper end of the piezoelectric material 126 is fitted into the fitting portion 122B in the hole 122A. Have been combined. Wirings 60, 6 connected to the power source 40 are provided from both ends of the piezoelectric material 126.
1 is extended so that current can be supplied from the power supply 40 to the piezoelectric element 124.

A coil spring 128 is interposed between the top of the vibration isolator 122 and the top plate 18, and the coil spring 128 presses the vibration isolator 122 toward the piezoelectric material 126. That is, the vibration isolator 122 is displaceably attached between the top plate 18 and the rubber 16, and the piezoelectric material 126 serving as a displacement imparting means is positioned adjacent to the vibration isolator 122.

As described above, when an electric current such as an alternating current is passed through the piezoelectric element 124, the piezoelectric material 126 expands and contracts, and vibrations in a phase opposite to the vibration generated on the engine side are expanded and contracted by the piezoelectric material 126 to cause the container 50 to move. It becomes possible to apply the vibration damping material 122 in the inside, and as a result, even when the vibration from the engine side is transmitted to the storage body 50, the vibration damping material 54 displaces the vibration via the piezoelectric material 126. By pulling and pressing the container 50 in the direction opposite to the direction, the amplitude of the container 50 can be reduced.

Next, a fifth embodiment of the vibration isolator according to the present invention is shown in FIGS. 6 and 7, and a fifth embodiment will be described based on these drawings. The same members as those used in the first embodiment are designated by the same reference numerals, and a duplicate description will be omitted.

As shown in FIG. 6 which is a sectional view of the present embodiment, a cylindrical space is provided in the storage body 50 which is a space partitioned between the storage body 50 of the vibration isolator 150 and the top plate 18. The vibration-proof material 132 in a shape is located. This anti-vibration material 132
Is formed of a member such as steel, and has a volume sufficient to reduce vibrations from the engine. The bottom surface of the vibration isolator 132 has a cylindrical hole 1
32A is formed. A rubber material 140 and a metal disc 142 are sequentially stacked on the bottom 50A of the storage body 50, and an elastic member 144 that is vulcanized and adhered to each other is also adhered to the bottom 50A. Piezoelectric element 13
A lower end portion of a piezoelectric material 136, which is a displacement imparting means in which a plurality of 4 are arranged and adhered to each other, is fixed with an adhesive or the like. Then, the upper end portion is adhered to the hole 132A. Wirings 60 and 61 respectively connected to the power source 40 extend from both ends of the piezoelectric material 136 so that current can be supplied from the power source 40 to the piezoelectric element 134. As a result, the piezoelectric material 136 vibrates the vibration damping material 132 in the Z-axis direction, which is the vertical direction in FIG.

A coil spring 138 is interposed between the upper portion of the vibration isolator 132 and the top plate 18, and the coil spring 138 presses the vibration isolator 132 toward the piezoelectric material 136.

On the other hand, on the outer peripheral portion 132B of the vibration isolator 132, four holes 132C located at equal intervals 90 degrees apart from each other extend toward the center of the vibration isolator 132. .. To fit into these holes 132C,
The elastic member 144 is provided on the inner wall surface of the annular portion 50B of the storage body 50.
One end of each of the four elastic members 145 having the same configuration as the above is adhered, and the other ends thereof have piezoelectric materials 137A, 137B, 137C, 13 having the same configuration as the piezoelectric material 136, respectively.
One end of 7D is fixed. Then, the piezoelectric material 137
The other end of each of A, 137B, 137C, and 137D is bonded inside the hole 132C. Further, wires (not shown) extend to the power source 40 from both ends of the piezoelectric materials 137A, 137B, 137C, and 137D, and the piezoelectric materials 137A, 137B, 137 extend from the power source 40.
An electric current is supplied to each of C and 137D.

These piezoelectric materials 137A, 137B, 137
A pair of piezoelectric materials 137A and 137C that sandwich the vibration isolator 132 in C and 137D and oppose each other vibrate the vibration isolator 132 in the X-axis direction which is the left-right direction in FIG. In addition, a pair of piezoelectric materials 137 sandwiching the vibration damping material 132 and facing each other.
7, B and 137D vibrate the vibration-proof material 132 in the vertical Y-axis direction in FIG.

That is, for example, by extending the piezoelectric material 137A and contracting the piezoelectric material 137C, the vibration isolator 132 is displaced in the X-axis direction. At this time, another piezoelectric material 137
Since the elastic members 144 and 145 are respectively interposed between the B, 137C and 137D and the storage body 50, the vibration isolator 132 is easily displaced. The elastic members 144 and 145 also act similarly in the displacements in the Y and Z axis directions, and the vibration damping material 1
32 will be easily displaced.

Next, a sixth embodiment of the vibration isolator according to the present invention is shown in FIG. 8, and a sixth embodiment will be described based on this drawing.
The same members as those used in the first embodiment are designated by the same reference numerals, and a duplicate description will be omitted.

As shown in FIG. 8 which is a sectional view of the present embodiment, the space inside the storage body 50, which is a space partitioned between the storage body 50 of the vibration isolator 160 and the top plate 18, is stored. A disc-shaped iron core 158 having a circular hole 158A in the center is fixed to the bottom 50A of the body 50 with an adhesive or the like, and a coil 156 is provided in the ring-shaped groove of the iron core 158. It is located wrapped around. This coil 1
Wiring 6 connected to the power source 40 from both ends of 56
0 and 61 are extended so that current can be supplied from the power supply 40 to the coil 46.

Further, inside the storage body 50, the iron core 158
A sleeve 153 press-fitted into the inner wall surface of the hole portion 158A is attached to the inner wall surface of the hole portion 158A, and a ring-shaped elastic member made of rubber whose outer peripheral side is vulcanized and adhered over the entire circumference. Of the support material 152 is attached to the inside of the sleeve 153.
A cylindrical vibration isolator 154 whose inner circumferential side is vulcanized and adhered over the entire circumference is positioned so as to enter the hole 158A of the iron core 158. Then, on the upper side of the iron core 158, the vibration isolator 1
A flange portion 154A protruding from the upper portion of 54 to the outer peripheral side is located. The vibration isolator 154 is made of, for example, a member that is attracted by a magnetic force, such as steel, and has a volume sufficient to reduce vibration from the engine. That is, the vibration-proof material 154 is used for the top plate 18 and the rubber 16.
Is attached so as to be displaceable between
A coil 156 and an iron core 158, which serve as displacement imparting means, are positioned adjacent to the vibration isolator 154 so as to displace No. 4.

From the above, the magnetic field is formed or eliminated by the coil 156 and the iron core 158, and the vibration having the opposite phase to the vibration generated on the engine side is accommodated by the suction to the iron core 158 side and the withdrawal by the support member 152. It becomes possible to give to the vibration isolator 154 in the body 50, and as a result,
Even when the vibration from the engine side is transmitted to the container 50, the vibration isolator 154 pulls the container 50 through the support member 152 in the direction opposite to the vibration displacement direction.
The amplitude of the container 50 can be reduced.

That is, a magnetic field is formed on the basis of the current flowing through the coil 156 to magnetize the iron core 158, and the magnetization of the iron core 158 attracts the vibration isolator 154 to bring it closer. Further, when the magnetization of the iron core 158 disappears, the vibration damping material 154 is pulled back upward by the elasticity of the support material 152.
Therefore, the power supply 4 is arranged so that the vibration isolator 54 vibrates in a phase opposite to that of the vibration of the holder 66 detected by the acceleration sensor 56, for example.
When 0 is controlled, the container 50 vibrates together with the holding table 66.
Vibration will be reduced.

As described above, since the vibration isolator 154, which is displaced by the current applied to the coil 156 in response to the vibration, is provided inside the vibration isolator, the shake vibration, the idle vibration, etc. can be compared with the conventional vibration isolator. Corresponding to the vibration of a wide range of frequencies from low frequency vibration to high frequency vibration that causes muffled noise, the vibration can be reduced with a small power consumption of the current flowing through the coil 156.

Next, a seventh embodiment of the vibration isolator according to the present invention is shown in FIG. 9, and the seventh embodiment will be described based on this drawing.
The same members as those used in the first embodiment are designated by the same reference numerals, and a duplicate description will be omitted.

As shown in FIG. 9 which is a sectional view of this embodiment, the upper end of the space inside the storage body 50, which is a space partitioned between the storage body 50 and the top plate 18 of the vibration isolator 180, is provided. A circular tubular bracket 172 having ribs 172A projecting from the inner circumference side of the part is fixed to the bottom 50A of the container 50 with an adhesive or the like, and is located inside the container 50 and is made of steel. A ring-shaped support member 162, which is an elastic member made of rubber, whose outer peripheral side is vulcanized and adhered to the ring 163 fitted to the bracket 172, is located on the upper side of the. Then, the inner peripheral side of the supporting member 162 is vulcanized and adhered to the outer peripheral side of the iron core 168 having a tubular shape over the entire circumference thereof, and the disk-shaped vibration isolator 164 is attached to the closed upper end portion 168A of the iron core 168. It is adhered with an adhesive or the like.

Therefore, since the vibration isolator 164 is supported by the bracket 172 via the support material 162 and the ring 163, the vibration isolator 164 can be displaced by elastic deformation of the support material 162. The vibration isolator 164 is formed of a member such as steel that is attracted by a magnetic force, and has a volume sufficient to reduce vibration from the engine. On the other hand, a disk-shaped magnet 174 is bonded inside the bracket 172, and a steel material 164 whose cylindrical upper end is loosely fitted inside the iron core 168 is bonded to the magnet 174 on the upper portion of this magnet 174. Has been located.

That is, the vibration-proof material 164 is the top plate 18 and the rubber 1.
6 and the vibration-proof material 1
A coil 166, a bracket 172, and a magnet 1 which are adjacent to the vibration isolator 164 and serve as displacement imparting means so as to displace 64.
74, the steel material 164, and the iron core 168 are located.

As described above, by reciprocally rotating the magnetic field formed by the coil 166 and the iron core 168, the vibration of the opposite phase to the vibration generated on the engine side is attracted and repelled by the coil 166 and pulled back by the support member 162. With this, it becomes possible to apply the vibration damping material 164 in the storage body 50, and as a result, even when the vibration from the engine side is transmitted to the storage body 50, the vibration damping material 164 holds the support material 162. By pulling the storage body 50 in the direction opposite to the displacement direction of the vibration, the amplitude of the storage body 50 can be reduced.

At this time, since the outer surface of the steel material 164 and the rib 172A of the bracket 172 are constantly magnetized by the magnet 176, when the coil 166 is magnetized, a displacement similar to that of the first embodiment is caused by a small magnetic field. Obtained and coil 16
When the magnetization of No. 6 disappears, the position of the vibration isolator 164 is maintained at the position shown in FIG. 9 by the support of the support member 162. Further, in this embodiment, the magnet 174 is attached to the bracket 172.
Although the structure is such that it is sandwiched between the steel material 164 and the steel material 164, it may be formed integrally with a magnet.

Further, in the present embodiment, the vibration isolator 164 and the iron core 168 are structured so as to be supported by the bracket 172 via the support material 162 and the ring 163, but they are larger on the inner wall surface of the storage body 50. The ring may be directly fixed and supported via the ring and the support member 162.

Next, an eighth embodiment of the vibration isolator according to the present invention is shown in FIG. 10, and the eighth embodiment will be described based on this drawing. The same members as those used in the first embodiment are designated by the same reference numerals, and a duplicate description will be omitted.

As shown in FIG. 10 which is a sectional view of the present embodiment, the space inside the housing 50, which is a space partitioned between the housing 50 of the vibration isolator 190 and the top plate 18, is stored. The screw shaft 188A and the screw shaft 1 are attached to the bottom portion 50A of the body 50.
A disc-shaped support plate 188 fixed by fastening a nut 189 screwed to 88A is located.

In addition, a vibration isolator 184 having a disk shape and also having a function as an iron core is located in the storage body 50, and a coil is provided in a ring-shaped groove of the vibration isolator 184. 18
6 is wrapped around. Wirings 60 and 61 respectively connected to the power source 40 extend from both ends of the coil 186 so that current can be supplied from the power source 40 to the coil 186.

Further, inside the storage body 50, the vibration damping material 18
On the lower side of 4, the ring 18 fitted to the vibration isolator 184
3, a ring-shaped support member 182, which is an elastic member made of rubber, is attached to the ring 183. The inner peripheral side of the supporting member 182 covers the entire circumference of the supporting plate 188.
It is vulcanized and bonded.

Therefore, since the vibration isolator 184 is supported by the support plate 188 via the support material 182 and the ring 183, the vibration isolator 184 can be displaced by elastic deformation of the support material 182. The vibration isolator 184 is formed of a member such as steel that is attracted by a magnetic force, and has a volume sufficient to reduce vibration from the engine.

That is, the vibration-proof material 184 is the top plate 18 and the rubber 1.
6 and the vibration-proof material 1
The coil 186 is incorporated in the vibration isolator 184 so as to displace 84. The vibration isolator 184 and the coil 18
6 serves as a displacement imparting means.

From the above, the coil 186 and the vibration isolator 184
A magnetic field is formed or eliminated by the, and vibration having a phase opposite to that of the vibration generated on the engine side is attracted to the support plate 188 side and pulled back by the support member 182 to receive the container 50.
It is possible to apply the vibration damping material 184 in the inside, and as a result, even when the vibration from the engine side is transmitted to the storage body 50, the vibration damping material 184 displaces the vibration via the support material 182. By pulling the container 50 in the direction opposite to the direction, the amplitude of the container 50 can be reduced.

That is, a magnetic field is formed based on the current flowing through the coil 186 to magnetize the vibration isolator 184, and the vibration isolator 18 is magnetized.
Due to the magnetization of No. 4, the vibration isolator 184 is attracted to and approaches the support plate 188 side. When the magnetization of the vibration isolator 184 disappears, the elasticity of the support material 182 causes the vibration isolator 184 to move.
Will be pulled back upward in the figure. Therefore, if the power source 40 is controlled so that the vibration isolator 54 vibrates in a phase opposite to the vibration of the holding base 66 detected by the acceleration sensor 56, for example,
The vibration of the container 50 that vibrates together with the holding table 66 is reduced.

Further, the vibration damping material 184 has a coil 186 serving as a displacement imparting means incorporated in the vibration damping material 184 itself so that the vibration damping material 184 has a displacement imparting means for generating displacement with respect to the container 50. As a result that 184 itself also has a function as an iron core serving as a displacement imparting means, it becomes possible to effectively utilize a small mass to enhance the vibration damping effect, and the vibration damping device 1
The weight of the entire 90 can be reduced. Therefore, in the case of the present embodiment, it is possible to contribute to weight reduction of the vehicle.

Next, a ninth embodiment of the vibration isolator according to the present invention is shown in FIG. 11, and the ninth embodiment will be described based on this drawing. The same members as those used in the first embodiment are designated by the same reference numerals, and a duplicate description will be omitted.

As shown in FIG. 11 which is a sectional view of the present embodiment, the space inside the storage body 50, which is a space partitioned between the storage body 50 of the vibration isolator 210 and the top plate 18, is stored. An iron core 198, which is fixed to the bottom portion 50A of the body 50 with an adhesive or the like and has a tubular shape, is located. The coil 1 is provided on the outer peripheral surface of the annular portion 198A forming the outer peripheral portion of the iron core 198.
96 is wound around and looks like a voice coil. Wirings 60 and 61 connected to the power source 40 extend from both ends of the coil 196, respectively.
Current can be supplied from the coil 196 to the coil 196.

Then, the coil 196 is provided coaxially with the iron core 198 in the storage body 50 over the entire circumference of the coil 196.
Is formed in a circular tube shape to cover the upper end plate 202A
The upright portion 202B forming the outer peripheral surface of the bracket 202 is located by the bracket 202 closed by
A ring 193 is fitted on the lower end side of the.

Further, a ring-shaped support member 192 which is an elastic member made of rubber and whose outer peripheral side is vulcanized and adhered to the ring 193 is attached to the ring 193, and the inner peripheral side of the support member 192 is attached. Is vulcanized and adhered to the iron core 198 over the entire circumference.

Further, a rib 202C is projected to the lower end side of the bracket 202 over the entire circumference so as to face the coil 196, and a central portion on the lower surface side of the bracket 202 is
A disk-shaped magnet 204 is adhered and fixed by an adhesive agent or the like, and a cylindrical steel material 194 is likewise adhered to the lower surface side of the magnet 204 so that the tip end side is loosely fitted in the iron core 198.

Then, the bracket 202 and the magnet 2
04, the steel material 194, etc. constitute the anti-vibration material 206, and the support material 1
Since the vibration isolator 206 is supported by the iron core 198 via the ring 92 and the ring 193, the vibration isolator 206 is supported by the support material 1
It is displaceable by elastic deformation of 92. Further, the bracket 202 and the steel material 194 that constitute the vibration damping material 206 are
It is formed of a member such as steel that is attracted by a magnetic force, and has a volume sufficient to reduce the vibration from the engine together with the magnet 204. Further, the coil 196 is provided adjacent to the rib 212C of the bracket 212 and the steel material 194 so as to displace the vibration isolator 206.
And the iron core 198 is located.

That is, the vibration-proof material 206 is the top plate 18 and the rubber 1.
6 is attached so as to be displaceable between
The device itself has the bracket 202, the magnet 204, and the steel material 194 that constitute the displacement imparting means.

Therefore, by reversing the magnetic field formed by the coil 196 in the normal and reverse directions, vibrations in the opposite phase to the vibrations generated on the engine side are attracted and repelled by the coil 196 and pulled back by the support member 192, so that the container 50 is housed. Anti-vibration material 2
06, and as a result, the storage body 5
Even when the vibration from the engine side is transmitted to 0, the vibration isolator 206 pulls the container 50 through the support member 192 in the direction opposite to the displacement direction of the vibration, so that the container 50 The amplitude can be reduced.

Further, according to the present embodiment, the vibration isolator 206 itself has the bracket 202, the magnet 204 and the steel material 194 so that the vibration isolator 206 has a displacement imparting means for generating the displacement similarly to the eighth embodiment. As a result, the vibration damping effect can be enhanced by effectively utilizing the small mass, and the weight of the vibration damping device 206 as a whole can be reduced.

Further, at this time, the steel material 194 of the vibration damping material 206 is used.
Since the outer surface and the ribs 212C are always magnetized by the magnet 204, when the coil 196 is magnetized, the same displacement as in the first embodiment can be obtained with a small magnetic field, and the coil 19
When the magnetization of No. 6 disappears, the position of the vibration isolator 206 is maintained at the position shown in FIG. 11 by the support of the support member 192.
Further, in the present embodiment, the magnet 204 has a structure in which the steel material 194 and the bracket 202 are sandwiched, but the magnet 204 may be formed integrally with the magnet.

In the first embodiment, the bottom plate 10 side serving as the first mounting member is connected to the vehicle body, and the top plate 18 side serving as the second mounting member is connected to the engine. In this case, since the vibration damping material is located closer to the vehicle body side, it is considered that the vibration reducing effect is further enhanced. Further, the sensor is a pair of acceleration sensors 56, 5
Although the acceleration sensor is set to 8, one acceleration sensor may be used, or a sensor that directly detects displacement may be used. On the other hand, the elastic body is the rubber 116 and the diaphragm 122, but other well-known elastic materials may be used. In the first, second and third examples, the support members 52, 92, 1
04 was adhered all around the inner wall surface of the container 50,
The divided supporting materials may be individually adhered to the inner wall surface, and the supporting materials 152, 162, 182, 192 used in the sixth to ninth embodiments may be divided into the supporting materials. The support materials may be adhered individually.

Further, instead of the coil springs 128 and 138 used in the fourth and fifth embodiments, another elastic body may be used for pressing, and the elastic member 14 of the fifth embodiment.
4, 145 may be made of another elastic body such as a coil spring. Further, the numbers of iron cores and piezoelectric materials in the second and fifth embodiments are not limited to those in these embodiments. On the other hand, in the first to ninth embodiments, the purpose is to isolate the vibration of the engine mounted in the vehicle, but it goes without saying that the isolation device of the present invention is also used for other purposes. The shape and size of the vibration isolator and the number of orifices are not limited to those of the embodiment.

[0083]

As a result of the structure described above, the vibration isolator of the present invention can effectively reduce the vibration from the low frequency band to the high frequency band, and the vibration damping characteristics of the vibration isolator can be reduced. Improvement is achieved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a vibration isolator according to the present invention.

FIG. 2 is a sectional view showing a second embodiment of the vibration isolator according to the present invention.

3 is a sectional view taken along the line 3-3 of FIG.

FIG. 4 is a sectional view showing a third embodiment of the vibration isolator according to the present invention.

FIG. 5 is a sectional view showing a fourth embodiment of the vibration isolator according to the present invention.

FIG. 6 is a sectional view showing a fifth embodiment of the vibration isolator according to the present invention.

7 is a sectional view taken along the line 7-7 of FIG.

FIG. 8 is a sectional view showing a sixth embodiment of the vibration isolator according to the present invention.

FIG. 9 is a sectional view showing a seventh embodiment of the vibration isolator according to the present invention.

FIG. 10 is a sectional view showing an eighth embodiment of the vibration isolator according to the present invention.

FIG. 11 is a sectional view showing a ninth embodiment of the vibration isolator according to the present invention.

[Explanation of symbols]

10 Bottom Plate (First Mounting Member) 14 Support Plate 16 Rubber (Elastic Body) 18 Top Plate (Second Mounting Member) 22 Diaphragm (Elastic Body) 36 Amplifier 38 Controller 40 Power Supply 46, 82, 84A, 84B, 86A, 86B , 11
2, 156, 166, 186, 196 Coil (displacement imparting means) 48, 72, 74A, 74B, 76A, 76B, 15
8, 168, 198 Iron core (displacement imparting means) 52, 92, 104, 152, 162, 182, 192
Support material 54, 94, 114, 122, 132, 154, 16
4, 184, 206 Anti-vibration material 56, 68 Acceleration sensor 96, 97, 98 Actuator (displacement imparting means) 124, 134 Piezoelectric element 126, 136, 137A, 137B, 137C, 13
7D Piezoelectric material (displacement imparting means) 80, 100, 120, 130, 150, 160, 18
0, 190, 210 anti-vibration device

Claims (2)

[Claims] 1. A first mounting member connected to one of the vibration generating portion and the vibration receiving portion, a second mounting member connected to the other of the vibration generating portion and the vibration receiving portion, and the first mounting member. And an elastic body interposed between the second mounting member and the second mounting member, and a vibration damping material having a mass that is displaceably mounted on any one of the mounting members and that reduces the vibration from the vibration generating portion. A displacement imparting means that is located adjacent to the vibration isolator and that displaces the vibration isolator, and at least one of the vibration generator side or the vibration receiver side that is installed on the vibration generator side or the vibration receiver side. An anti-vibration device comprising: a sensor that detects vibration; and a displacement applying unit and a control unit that is connected to the sensor and that controls the operation of the displacement applying unit based on a signal from the sensor. 2. A first mounting member connected to one of the vibration generating portion and the vibration receiving portion, a second mounting member connected to the other of the vibration generating portion and the vibration receiving portion, and the first mounting member. And an elastic body interposed between the second mounting member and the second mounting member and displaceably mounted on any of the mounting members and having a mass enough to reduce the vibration from the vibration generating portion and the mounting of the second mounting member. A vibration-damping material having a displacement imparting means for generating a displacement with respect to a member; a sensor installed on at least either the vibration generating portion side or the vibration receiving portion side and detecting the vibration of the vibration generating portion or the vibration receiving portion; An anti-vibration device, comprising: a displacement giving unit and a control unit that is connected to the sensor and controls the operation of the displacement giving unit based on a signal from the sensor.