JP4323673B2 - Vibration isolator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration isolator that is applied to, for example, automobiles, general industrial machines, and the like and attenuates vibrations transmitted from a vibration generating unit such as an engine to a vibration receiving unit such as a frame.
[0002]
[Prior art]
In an automobile, an engine mount as a passive vibration isolator is disposed between an engine and a vehicle body (frame). Such an engine mount absorbs vibration energy by the internal resistance of the rubber elastic body, and attenuates vibration from the engine to suppress vibration transmitted to the frame. However, in such an engine mount, although vibration from the engine can be attenuated at a constant attenuation rate, theoretically, vibration transmitted from the engine to the frame cannot be completely eliminated.
[0003]
Therefore, in recent years, application of an active damper, which is an active vibration isolator capable of completely canceling vibration transmitted from the vibration generating unit to the vibration receiving unit in theory, has been studied. As an active damper, for example, there is one that elastically supports a mass body by a coil spring or the like and vibrates the mass body by applying an excitation force to the mass body by an electromagnetic actuator or the like. The active damper is fixed to the vibration receiving portion, the actuator is driven in accordance with the vibration frequency transmitted to the vibration receiving portion, and the mass body is vibrated by the actuator, so that the reaction force from the mass body (control force) The vibration transmitted to the vibration receiving portion can be actively canceled.
[0004]
Therefore, in an automobile, an anti-vibration mount (engine mount) is arranged between the engine and the vehicle body, and in addition to damping vibrations from the engine by this anti-vibration mount, an active damper is arranged on the frame from the engine. By vibrating the mass body of the active damper so as to cancel the vibration transmitted to the vehicle body, the vibration of the frame during engine operation can be greatly reduced as compared with the case where only the vibration-proof mount is used.
[0005]
[Problems to be solved by the invention]
However, if an active damper is to be attached to the frame in addition to the anti-vibration mount, a space for attaching the active damper to the frame must be secured, and a mounting portion for attaching the active damper to the frame with bolts or the like must be provided. In some cases, a major design change may be required for the frame. Moreover, in the manufacturing process of a motor vehicle, since the process of attaching an active damper to a frame is added, the problem that manufacturing work becomes troublesome also arises.
[0006]
Furthermore, in view of durability and the like, the active damper needs to have a structure that is sufficiently sealed against the environment in the automobile so that dust, oil, water, corrosive gas, and the like do not enter the damper. However, when such a seal structure is provided, the structure of the active damper becomes complicated and the manufacturing cost of the active damper increases.
[0007]
In view of the above facts, an object of the present invention is to provide a vibration isolator having both a function as an anti-vibration mount and a function as an active damper and a simple structure.
[0008]
[Means for Solving the Problems]
  The vibration isolator according to claim 1, wherein the first mounting member connected to one of the vibration generating unit and the vibration receiving unit, the second mounting member connected to the other of the vibration generating unit and the vibration receiving unit, A rubber elastic body disposed between the first mounting member and the second mounting member and elastically deformed by an input vibration from a vibration generating portion; the first mounting member and the second mounting member; Between the first and second mounting members, and a mass body disposed between the mass body and capable of relative displacement along the amplitude direction of the input vibration from the vibration generating unit. An elastic connecting member to be connected; and a vibration means for vibrating the mass body along the amplitude direction in response to vibration of a vibration generating unit,The vibrating means communicates alternately with the first and second pressure sources having different atmospheric pressures, and alternately communicates the gas sealed chamber with the first pressure source and the second pressure source. And a movable partition that constitutes at least a part of the partition wall of the gas sealing chamber and applies an excitation force along the amplitude direction to the mass body according to a change in atmospheric pressure in the gas sealing chamber And
When the vibration means does not vibrate the mass body along the amplitude direction, the gas-filled chamber is maintained in a negative pressure state with respect to the outside, and the movement resistance in the amplitude direction with respect to the mass body To actIs.
[0009]
According to the vibration isolator having the above configuration, the energy of the input vibration is absorbed by the internal resistance of the rubber elastic body due to the elastic deformation of the rubber elastic body due to the input vibration at the time of vibration input. The input vibration transmitted to the mounting member can be damped passively. Furthermore, when the mass body is vibrated along the amplitude direction of the input vibration by the vibration means corresponding to the frequency of the input vibration at the time of vibration input, the inertial force that cancels the vibration input through the rubber elastic body is mass. The vibration generated by the body and transmitted from the vibration generating unit to the vibration receiving unit can be actively attenuated or eliminated.
[0010]
That is, the vibration isolator configured as described above functions as an anti-vibration mount that supports the vibration generating unit and attenuates vibration transmitted from the vibration generating unit to the vibration receiving unit and the vibration from the vibration generating unit. It also functions as an active damper that cancels out.
[0011]
Therefore, according to the vibration isolator having the above configuration, the active damper is attached to the vibration receiving portion or the vibration generating portion in comparison with the case where the active damper is separately attached to the vibration receiving portion or the vibration generating portion in addition to the vibration isolating mount. Since it is not necessary to provide the mounting portion, the structure of the vibration receiving portion or the vibration generating portion is simplified and an increase in installation space is also suppressed.
[0012]
Furthermore, since the mounting structure to the vibration receiving part or the vibration generating part that had to be provided in each of the vibration isolating mount and the active damper can be made common, the total number of parts can be reduced and the vibration receiving part or the vibration generating part can be reduced. The installation work to can also be simplified.
[0013]
The vibration isolator according to claim 2 is the vibration isolator according to claim 1, wherein a seal space isolated from the outside is provided between the first mounting member and the second mounting member, and the seal space is provided. The vibration means is arranged inside.
[0014]
According to the vibration isolator having the above configuration, the seal space in which the vibration means is disposed is provided between the first attachment member and the second attachment member, so that the interior of the apparatus can be used as an installation space for the vibration means. Since space can be used efficiently, an increase in the size of the apparatus due to the provision of the excitation means can be suppressed.
[0015]
Moreover, since the partition which isolate | separates sealing space from the exterior can be comprised with apparatus parts which exist conventionally, such as a rubber elastic body, the increase in the number of parts by providing sealing space can be suppressed.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a vibration isolator according to an embodiment of the present invention will be described with reference to the drawings.
[0017]
(First embodiment)
FIG. 1 shows a vibration isolator 10 according to a first embodiment of the present invention. This anti-vibration device 10 is applied as an anti-vibration mount that supports an engine in a vehicle on a vehicle body and an active damper that actively cancels vibrations of the vehicle body. In the figure, symbol S denotes an axis that is the center line of the apparatus, and the following description will be made with the direction along the axis as the axial direction of the apparatus.
[0018]
The vibration isolator 10 has a bottomed cylindrical mounting bracket 14 as a mounting member to the vehicle body 12 in an automobile. A flange portion 16 extending outward in the radial direction is formed at the upper end portion of the mounting bracket 14. A bolt 18 is fixed to the mounting bracket 14 by welding or the like so as to protrude downward along the axis S from the bottom surface.
[0019]
A thin support cylinder 20 is inserted into the mounting bracket 14. A flange-like flange portion 22 extending outward in the radial direction is formed at the upper end portion of the support cylinder 20, and the flange portion 22 is placed on the flange portion 16 of the outer cylinder fitting 24.
[0020]
A substantially cylindrical outer tube fitting 24 is disposed above the mounting bracket 14. A caulking portion 26 extending outward in the radial direction is formed at the lower end portion of the outer cylinder fitting 24, and the caulking portion 26 is placed on the flange portion 16 via the flange portion 22 of the support cylinder 20. Yes. The outer cylindrical fitting 24 is caulked so that the caulking portion 26 sandwiches the flange portion 22 and the flange portion 16, and the lower end portion thereof is coaxially connected and fixed to the upper end portion of the mounting fitting 14.
[0021]
On the upper side of the outer cylinder fitting 24, a diameter-expanded portion 28 that extends in a tapered shape toward the outer peripheral side is formed. A lower end portion of a substantially truncated cone-shaped rubber elastic body 30 whose outer diameter decreases upward is vulcanized and bonded to the inner peripheral surface of the enlarged diameter portion 28. The rubber elastic body 30 has an upper end projecting upward from the outer cylinder fitting 24. A circular recess 32 is formed at the center of the bottom surface of the rubber elastic body 30, and the cross-sectional shape along the axial direction of the rubber elastic body 30 is a substantially V-shape opened downward. A disc-shaped top plate metal fitting 34 is vulcanized and bonded to the top surface of the rubber elastic body 30. A bolt shaft 36 is fixed to the top surface of the top plate fitting 34 by welding or the like so as to protrude upward along the axis S.
[0022]
A cylindrical thin portion 38 is integrally formed at the lower end portion of the rubber elastic body 30 so as to extend downward. The upper side of the thin wall portion 38 is vulcanized and bonded so as to cover the inner peripheral surface of the outer tube fitting 24, and the lower end side of the thin wall portion 38 extends to the outer peripheral side and is sandwiched between the caulking portion 26 and the flange portion 22. Yes.
[0023]
Between the mounting bracket 14 and the top plate bracket 34, there is formed a seal space 42 which is an air chamber isolated from the outside with the mounting bracket 14, the outer cylinder bracket 24 and the rubber elastic body 30 as partition walls. In the seal space 42, a metal mass member 44 formed in a thick disk shape is supported so as to be displaceable along the axial direction.
[0024]
The inner peripheral surface of the ring-shaped elastic connecting member 40 is vulcanized and bonded to the outer peripheral surface of the mass member 44 over the entire periphery. The outer peripheral surface of the elastic connecting member 40 is the inner peripheral surface of the substantially cylindrical connecting fitting 68. The entire surface is vulcanized and bonded to the surface. A flange portion 69 extending to the outer peripheral side is formed at the lower end portion of the connecting metal 68, and this flange 69 together with the flange portion 22 of the support cylinder 20 and the caulking portion 26 of the outer metal fitting 24. It is pinched and fixed between. Thereby, the mass member 44 is elastically connected to the outer cylinder fitting 24 by the elastic connecting member 40, and the elastic connecting member 40 is deformed to be deformable along the axial direction.
[0025]
A rubber diaphragm 45 is disposed below the mass member 44 in the seal space 42. The diaphragm 45 has a cup shape that opens downward, and its open end is vulcanized and bonded to the vicinity of the lower end of the support cylinder 20 over the entire circumference. Thereby, the diaphragm 45 divides the seal space 42 into two small air chambers along the axial direction, and the space on the lower side is a gas sealed chamber 46. In addition, about the air chamber above the diaphragm 45 in the seal space 42, holes may be formed in the outer cylinder fitting 24 and the bolt shaft 36 of the rubber elastic body 30 as necessary to communicate with the outside.
[0026]
A dish-shaped spring receiving member 48 is disposed in the gas sealing chamber 46 so as to be in close contact with the top of the diaphragm 45. The spring receiving member 48 is fastened and fixed to the lower surface of the mass member 44 by a bolt 51 through a diaphragm 45. Thereby, the top part of the diaphragm 45 is connected to the lower surface of the mass member 44.
[0027]
A metal coil spring 52 is disposed in the gas sealing chamber 46 between the spring receiving member 48 and the bottom surface of the mounting bracket 14. The coil spring 52 has a lower end pressed against the outer tube fitting 24 and an upper end pressed against the spring receiving member 48 and is compressed by a predetermined amount in the direction. Thus, the mass member 44 is elastically supported by the coil spring 52 together with the elastic connecting member 40. Here, the diaphragm 45 and the coil spring 52 constitute a vibration means for applying a vibration force to the mass member 44. Since these are in the seal space 42 isolated from the outside, water, oil, Protected from corrosive gases.
[0028]
A pressure pipe 54 is connected to the bottom plate portion of the mounting bracket 14 via a nipple (not shown) or the like, and this pressure pipe 54 connects a gas sealing chamber 46 to a three-port two-position switching valve (hereinafter referred to as a switching valve) 56. Connected to. Connected to the switching valve 56 are a pressure supply pipe 60 that communicates with an intake manifold 58 of the engine and a pressure release pipe 62 that communicates with the external space of the apparatus. The switching valve 56 is an open / close valve with a built-in electromagnetic solenoid. In an excited state in which a drive voltage (for example, 12 V DC) is applied, the pressure supply pipe 60 communicates with the pressure pipe 54 and no drive voltage is applied. In the non-excited state, the pressure release pipe 62 is communicated with the pressure pipe 54.
[0029]
Here, the intake manifold 58 is always maintained in a negative pressure state relative to the atmospheric pressure when the engine is operating. Therefore, when the driving voltage is applied to the switching valve 56, the gas sealing chamber 46 communicates with the intake manifold 58, and the internal pressure of the gas sealing chamber 46 becomes negative with respect to the atmospheric pressure. Is not applied, the gas sealing chamber 46 communicates with the external space, and the internal pressure of the gas sealing chamber 46 becomes equal to the atmospheric pressure.
[0030]
In the vibration isolator 10, when the internal pressure of the gas sealing chamber 46 changes from the atmospheric pressure to the negative pressure, the diaphragm 45 contracts downward along the axial direction, and the mass member 44 is deformed by the deformation resistance of the elastic coupling member 40 and the coil spring 52. Displace downward against From this state, when the gas sealing chamber 46 becomes atmospheric pressure, the mass member 44 is displaced upward along the axial direction by the restoring force of the elastic connecting member 40 and the coil spring 52. At this time, the mass member 44 moves upward from the initial position shown in FIG. Therefore, by periodically applying a driving voltage to the switching valve 56, the mass member 44 vibrates at a frequency corresponding to the period of the driving voltage.
[0031]
In the vibration isolator 10 configured as described above, the bolt 18 of the mounting bracket 14 is placed on the vehicle body 12 so as to pass through the mounting hole 64 drilled in the vehicle body 12 and protrudes from the mounting hole 64. When the nut 66 is screwed into the tip end portion 18, the mounting bracket 14 is fastened and fixed to the vehicle body 12. An engine bracket (not shown) is placed on the top plate fitting 34 of the vibration isolator 10. At this time, the bolt shaft 36 of the top plate fitting 34 is inserted through a mounting hole formed in the bracket, and a nut (not shown) is screwed into the tip end portion of the bolt shaft 36 protruding from the mounting hole. Is fastened and fixed to the engine bracket.
[0032]
The vibration isolator 10 includes a controller 70 that controls the switching valve 56, and a signal line of a vibration sensor 72 installed on the vehicle body 12 is connected to the controller 70. The vibration sensor 72 is disposed at a position close to the vibration isolator 10, detects the vibration of the vehicle body 12, and outputs an electric signal having a waveform (for example, a sine waveform) corresponding to this vibration to the controller 70 as a detection signal. .
[0033]
The controller 70 receives the signal from the vibration sensor 72 and determines the frequency and phase of vibration. The controller 70 determines the ratio between the time when the drive voltage to the switching valve 56 is turned on and the time when it is turned off so that the mass member 44 vibrates at a frequency equal to the frequency of vibration in the vehicle body 12, that is, the duty ratio and one cycle of the drive voltage. Set the length of. Further, the controller 70 controls the phase of the drive voltage so that the mass member 44 vibrates at a phase (including an opposite phase) having a certain time lag from the phase of vibration in the vehicle body 12.
[0034]
Next, the operation and action of the vibration isolator 10 according to the embodiment of the present invention will be described.
[0035]
When vibration from the engine is input through the top plate fitting 34, this vibration is transmitted to the rubber elastic body 30, and the rubber elastic body 30 is elastically deformed. Thereby, the vibration is attenuated by the action based on the internal friction of the rubber elastic body 30, and the vibration level transmitted from the engine to the vehicle body 12 is reduced.
[0036]
On the other hand, when vibration from the engine is transmitted to the vehicle body 12 via the vibration isolator 10, the vibration sensor 72 detects the vibration of the vehicle body 12 and outputs a detection signal to the controller 70. Receiving the detection signal from the vibration sensor 72, the controller 70 outputs a drive voltage corresponding to the vibration frequency to the switching valve 56 to vibrate the mass member 44 at a frequency equal to the vibration frequency in the vehicle body 12. Thereby, kinetic energy (inertial force) defined by the product of the mass and acceleration of the mass member 44 is generated, and vibration transmitted from the engine to the vehicle body 12 is canceled by this inertial force.
[0037]
As described above, the vibration isolator 10 according to this embodiment functions as an anti-vibration mount that attenuates vibration transmitted from the engine to the vehicle body 12 and as an active damper that cancels vibration from the engine by the inertia force of the mass member 44. It has both functions. Therefore, according to the vibration isolator 10, it is not necessary to provide a mounting portion for the active damper on the vehicle body 12 as compared with the case where the active damper is separately mounted on the vehicle body 12 in addition to the vibration isolation mount. The structure is simplified and it is not necessary to provide an installation space for the engine mount in the automobile.
[0038]
Further, since the mounting structure (mounting structure) required to be provided on each of the vibration-proof mount and the active damper can be made common, the total number of parts can be reduced and the mounting work to the vehicle body 12 or the engine can be performed. It will also be easy.
[0039]
Further, the vibration isolator 10 does not cancel the vibration in the vehicle body 12 unlike the conventional active damper, and the vibration transmitted from the engine to the vehicle body 12 by applying an inertial force to the mounting portion of the vibration isolator 10 in the vehicle body 12. Therefore, the vibration level input to the vehicle body 12 can be attenuated.
[0040]
The vibration isolation means of the vibration isolator 10 includes a diaphragm 45, a coil spring 52, a spring receiving member 48, and the like, for example, compared with an electromagnetic actuator that generates an excitation force using the electromagnetic force of an electromagnet, The number of parts and the weight can be reduced, and since the operation is performed by the gas pressure supplied from the outside, the power consumption is extremely small. In addition, if the space below the mass member 44 in the seal space 42 has an airtight structure and pressure gas is supplied to this space, the elastic connecting member 40 is bent and deformed along the axial direction in accordance with a change in internal pressure. Therefore, the diaphragm 45 can be omitted.
[0041]
Note that the types of vibration from the engine include, for example, a shake vibration (less than 15 Hz) that occurs when the vehicle travels at 70 to 80 km / h, and an idle vibration that occurs during idling operation and low-speed operation with a vehicle speed of 5 km / h or less. (20 to 30 Hz), etc., but the type of these vibrations is judged by the controller 70, and the active damper function of the vibration isolator 10 is used only when a specific vibration, for example, a shake vibration, is transmitted to the vehicle body 12. May be operated.
[0042]
However, if the gas sealing chamber 46 is maintained at atmospheric pressure when the active damper function of the vibration isolator 10 is stopped, free vibration of the mass member 44 elastically supported by the coil spring 52 becomes possible. Therefore, when the vehicle body 12 vibrates, the mass member 44 may resonate and promote the vibration of the vehicle body 12 instead. In order to prevent such a problem, for example, when the active damper function of the vibration isolator 10 is stopped, the switching valve 56 is controlled so that the inside of the gas sealing chamber 46 is in a negative pressure state, and the diaphragm 45 is reduced. To maintain. Thereby, since the displacement along the axial direction of the mass member 44 is suppressed by the deformation resistance of the compressed coil spring 52, resonance of the mass member 44 can be effectively suppressed even when the vehicle body 12 vibrates.
[0043]
In the vibration isolator 10, the intake manifold 58 is used as a pressure source to the gas sealing chamber 46, and negative pressure and atmospheric pressure are alternately supplied to the gas sealing chamber 46. The mass member 44 can also be vibrated by connecting the gas sealing chamber 46 to the exhaust manifold of the engine and alternately supplying positive pressure and atmospheric pressure to the gas sealing chamber 46.
[0044]
(Second Embodiment)
FIG. 2 shows a vibration isolator 80 according to the second embodiment of the present invention.
In the vibration isolator 80 according to the present embodiment, members having the same structure as those of the vibration isolator 10 according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0045]
The vibration isolator 80 according to the present embodiment is different from the vibration isolator 10 according to the first embodiment in that the vibration isolator that operates by the gas pressure is used as an exciter for applying an excitation force to the mass member 44. The electromagnetic actuator 82 is used. The electromagnetic actuator 82 is disposed in the mounting bracket 14. The electromagnetic actuator 82 is provided with a thick cylindrical yoke 84 made of a magnetic metal and a top plate member 86 that closes the opening on the upper surface of the yoke 84. A permanent magnet 88 is fixed to the inner peripheral surface of the yoke 84, and a cylindrical magnetic space 90 is formed on the inner peripheral side of the permanent magnet 88. A thick disk-like movable element 92 is disposed in the magnetic space 90, and an insulating conductor such as a copper wire is wound around the outer periphery of the movable element 92 to provide a cylindrical coil 94.
[0046]
A coil spring 96 is disposed in the magnetic space 90 between the mover 92 and the bottom plate portion of the yoke 84, and the coil spring 96 elastically supports the mover 92. A connecting rod 98 that protrudes upward along the axis S is provided on the upper surface of the mover 92. The top plate member 86 is provided with a substantially cylindrical bearing member 97 disposed so as to penetrate the center portion thereof. The connecting rod 98 extends through the bearing member 97 and above the top plate member 86. A disc-shaped fixing portion 99 is provided at the distal end portion of the connecting rod 98, and the fixing portion 99 is fixed to the lower surface of the mass member 44 by screwing or the like.
[0047]
A rubber stopper member 101 having a predetermined thickness is fixed to the lower surface of the mass member 44 along the axial direction. The stopper member 101 restricts the range of downward movement of the mass member 44 and suppresses the generation of impact sound and vibration due to the metal mass member 44 directly colliding with the top plate member 86.
[0048]
In the electromagnetic actuator 82, when a drive voltage having a predetermined polarity is applied to the coil 94, an electromagnetic force that urges the coil 94 downward along the axial direction is generated between the coil 94 and the permanent magnet 88. As a result, the movable element 92 moves downward against the biasing force of the coil spring 96, and when the application of the drive voltage to the coil 94 is stopped, the movable element 92 moves upward by the biasing force of the coil spring 96. At this time, the mover 92 moves upward from the initial position shown in FIG. 1 by inertial force. Therefore, by periodically applying a driving voltage to the coil 94, the mass member 44 vibrates at a frequency corresponding to the period of the driving voltage.
[0049]
The vibration isolator 80 includes a controller 100 that controls the electromagnetic actuator 82, and a signal line of a vibration sensor 72 installed on the vehicle body 12 is connected to the controller 100. The controller 100 receives the signal from the vibration sensor 72 and determines the frequency and phase of vibration. The controller 100 determines the ratio of the time during which the drive voltage to the coil 94 is turned on and the time when it is turned off so that the mass member 44 vibrates at a frequency equal to the frequency of vibration in the vehicle body 12, that is, the duty ratio of the drive voltage and one cycle. Set the length. Further, the controller 100 controls the phase of the drive voltage so that the mass member 44 vibrates at a phase (including an opposite phase) having a certain time lag from the phase of vibration in the vehicle body 12.
[0050]
Next, the operation and action of the vibration isolator 80 according to the present embodiment will be described.
[0051]
When vibration from the engine is input via the top plate fitting 34, this vibration is transmitted to the rubber elastic body 30, and the rubber elastic body 30 is elastically deformed. Thereby, the vibration is attenuated by the action based on the internal friction of the rubber elastic body 30, and the vibration transmitted from the engine to the vehicle body 12 is attenuated.
[0052]
On the other hand, when vibration from the engine is transmitted to the vehicle body 12 via the vibration isolation device 80, the vibration sensor 72 detects the vibration of the vehicle body 12 and outputs a detection signal to the controller 100. Upon receiving the detection signal from the vibration sensor 72, the controller 100 outputs a drive voltage corresponding to the vibration frequency to the coil 94 to vibrate the mass member 44 at a frequency equal to the vibration frequency in the vehicle body 12. Thereby, kinetic energy (inertial force) defined by the product of the mass and acceleration of the mass member 44 is generated, and vibration transmitted from the engine to the vehicle body 12 is canceled by this inertial force.
[0053]
The anti-vibration device 80 according to the present embodiment described above has the same effects as the anti-vibration device 10 according to the first embodiment. Further, in the vibration isolator 80 of the present embodiment, the excitation force to the mass member 44 is generated by the electromagnetic actuator 82, so that the mass member 44 is vibrated in a wide frequency range from a low frequency to a high frequency with good responsiveness. Is possible. Accordingly, vibrations in a wide frequency range can be effectively canceled with almost no time lag.
[0054]
In the vibration isolator 80 according to the present embodiment, a DC driving voltage is applied to the coil 94 to apply an electromagnetic force in one direction (downward) to the mover 92. Even if the drive voltage is applied to the coil 94, the mass member 44 connected to the mover 92 can be vibrated.
[0055]
In the vibration isolator 80, the mass member 44 can freely vibrate when the active damper function is stopped. Therefore, the mass member 44 may resonate when the vehicle body 12 vibrates, and the vibration of the vehicle body 12 may be avoided. . In order to prevent such a problem, for example, the shaft of the mass member 44 is controlled by controlling the electromagnetic actuator 82 so that the movable element 92 is biased downward when the active damper function of the vibration isolator 80 is stopped. Since the displacement along the direction is suppressed, resonance of the mass member 44 can be effectively suppressed even when the vehicle body 12 vibrates.
[0056]
(Third embodiment)
FIG. 3 shows a vibration isolator 110 according to a third embodiment of the present invention. In the vibration isolator 110 according to the present embodiment, members having the same structure as those of the vibration isolator 10 according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0057]
As shown in FIG. 3, the vibration isolator 110 has a substantially disc-shaped bottom plate metal fitting 112 as an attachment member to the vehicle body 12. The bottom plate metal fitting 112 is formed with a flange portion 114 that is bent in a crank shape upward from the inner peripheral side toward the outer peripheral side on the outer peripheral portion thereof. A cylindrical guide rod 116 is fixed to the bottom plate fitting 112 so as to protrude upward along the axis S at the center on the upper surface side. Further, a plurality of (two in FIG. 3) bolts 118 are fixed to the bottom surface of the bottom plate metal 112 in parallel with the axis S, and these bolts 118 and nuts 120 respectively screwed into the tip portions thereof. Fastened and fixed onto the vehicle body 12.
[0058]
The lower end portion of the thin cylindrical outer tube fitting 122 is connected and fixed to the flange portion 114 of the bottom plate fitting 112. The outer cylindrical fitting 122 is formed with a step portion 124 that is bent at a right angle toward the inner peripheral side at an axially intermediate portion, and is slightly lower than the outer diameter of the bottom plate fitting 112 via the step portion 124. A large-diameter portion 126 having a large inner diameter is formed, and a small-diameter portion 128 whose diameter is narrowed with respect to the large-diameter portion 126 is formed on the upper side.
[0059]
At the lower end of the large-diameter portion 126, a caulking portion 130 is provided that is plastically deformed to the inner peripheral side when the outer tube fitting 122 is connected to the bottom plate fitting 112. A cylindrical support fitting 132 is inserted on the inner peripheral side of the large-diameter portion 126, and the support fitting 132 has an upper end surface that is connected to the bottom plate fitting 112 and a lower surface of the stepped portion 124. The lower end surface is brought into contact with the outer peripheral portion of the upper surface of the bottom plate metal fitting 112. In this state, the caulking portion 130 is caulked toward the inner peripheral side, whereby the outer cylinder fitting 122 is restrained from moving in the axial direction by the support fitting 132 and fixed to the bottom plate fitting 112.
[0060]
The outer cylinder fitting 122 is formed with an enlarged diameter portion 133 having an inner diameter that tapers upward at the upper end portion thereof. The outer peripheral surface of a substantially thick disk-shaped rubber elastic body 134 is vulcanized and bonded to the inner peripheral surface of the enlarged diameter portion 133. This rubber elastic body 134 has a substantially C-shaped cross section that opens downward along the axial direction, and has a truncated cone shape whose inner diameter decreases downward in the center of the upper surface. The recessed part 137 is formed. A top plate fitting 139 formed in a truncated cone shape corresponding to the recess 137 is inserted into the recess 137 and vulcanized and bonded.
[0061]
A bolt 136 is fixed to the center of the upper surface of the top plate metal 139 so as to protrude upward along the axis S. The top plate fitting 139 is fastened and fixed to the engine (not shown) side by the bolt 136 and a nut (not shown) screwed into the bolt 139. Further, a thin cylindrical covering portion 135 extends downward from the lower end portion of the rubber elastic body 134, and this covering portion 135 is vulcanized and bonded so as to cover the inner peripheral surface of the small diameter portion 128 of the outer cylinder fitting 122. Has been.
[0062]
A seal space 138 shielded from the outside is formed in the outer tube fitting 122 whose upper end and lower end are respectively closed by the rubber elastic body 134 and the bottom plate fitting 112. An electromagnetic actuator 140 is disposed in the seal space 138, and the electromagnetic actuator 140 includes a movable yoke 142, a permanent magnet 144, and an electromagnet 146.
[0063]
The movable yoke 142 is formed in a hollow shape using cast iron or cast steel as a material, and constitutes an outer shell portion of the electromagnetic actuator 140. The movable yoke 142 is provided with a casing member 148 having a bottomed cylindrical shape and a disc-shaped lid member 150 that closes an opening on the upper surface side of the casing member 148. The bottom plate portion of the casing member 148 and the lid member 150 are provided with through holes 149 and 151 having a circular cross section along the axis S, and cylindrical bearing members 152 are respectively provided in the through holes 149 and 151. It is inserted so as to be coaxial with the axis S. A guide rod 116 is slidably inserted into the pair of bearing members 152. Accordingly, the movable yoke 142 is supported by the guide rod 116 so as to be movable in the axial direction.
[0064]
Further, the inner peripheral surface of a ring-shaped rubber elastic coupling member 154 is vulcanized and bonded to the lower side of the outer peripheral surface of the movable yoke 142, and the outer peripheral surface of the elastic coupling member 154 is the inner peripheral surface of the support fitting 132. Is vulcanized and bonded. Thereby, the movable yoke 142 is elastically connected to the outer cylinder fitting 122 via the elastic connecting member 154 and the support fitting 132. Therefore, when the movable yoke 142 moves in the axial direction, the elastic connecting member 154 elastically deforms according to the moving direction and moving amount, and applies a restoring force corresponding to the moving direction and moving amount to the movable yoke 142.
[0065]
The outer peripheral surface of a thick cylindrical permanent magnet 144 is fixed to the inner peripheral surface of the movable yoke 142. Here, the movable yoke 142 and the permanent magnet 144 are configured as a mass member 156 for canceling the input vibration from the engine. A substantially columnar electromagnet 146 is disposed in the movable yoke 142. The electromagnet 146 is provided with a core 158 made of soft iron having a substantially cylindrical shape on the inner peripheral side, and an insulated conductor is wound around the outer peripheral side of the core 158 to provide a coil 160.
[0066]
A through hole 159 is formed along the axis S in the core 158, and a guide rod 116 is inserted into the through hole 159. Circumferential grooves 162 are formed along the circumferential direction in portions corresponding to the upper and lower surfaces of the core 158 of the guide rod 116, and bowl-shaped C-rings 164 are formed in the peripheral grooves 162 at the upper and lower surfaces of the core 158. It is inserted so that each may contact. Thereby, the electromagnet 146 is fixed to the guide rod 116 so that the outer peripheral surface of the coil 160 faces the inner peripheral surface of the electromagnet 146. The C-ring 164 also functions as a stopper for limiting the movement stroke (amplitude) of the movable yoke 142 in the axial direction.
[0067]
When a drive voltage having a predetermined polarity is applied to the coil 160, the electromagnetic actuator 140 generates an electromagnetic force that biases the permanent magnet 144 in one direction along the axial direction between the coil 160 and the permanent magnet 144. To do. Accordingly, the permanent magnet 144 and the movable yoke 142 that supports the permanent magnet 144 move in one direction along the axial direction while elastically deforming the elastic connecting member 154.
[0068]
When the polarity of the drive voltage applied to the coil 160 is reversed, an electromagnetic force is generated between the coil 160 and the permanent magnet 144 so as to bias the permanent magnet 144 in the other direction along the axial direction. Thereby, the permanent magnet 144 and the movable yoke 142 move in the other direction along the axial direction while elastically deforming the elastic connecting member 154 by the electromagnetic force and the restoring force of the elastic connecting member 154. Therefore, by applying a driving voltage having a waveform (for example, a pulse waveform) whose polarity is periodically reversed to the coil 160, the permanent magnet 144 and the movable yoke 142 constituting the mass member 156 are driven along the axial direction. Vibrates at a frequency corresponding to the polarity reversal period of the voltage.
[0069]
The vibration isolator 110 includes a controller 166 that controls the electromagnetic actuator 140, and a signal line of a vibration sensor 72 installed on the vehicle body 12 is connected to the controller 166. The controller 166 receives the signal from the vibration sensor 72 and determines the frequency and phase of vibration. The controller 166 sets the cycle of the driving voltage to the coil 160 so that the mass member 156 vibrates at a frequency equal to the vibration frequency in the vehicle body 12, and the mass member 156 has a certain deviation from the phase of vibration in the vehicle body 12. The phase of the drive voltage is controlled so as to vibrate with the phase (including the opposite phase).
[0070]
Here, the controller 166 applies a driving voltage to the coil 160 of the electromagnet 146 via the cable 168, but the portion of the cable 168 inserted into the vibration isolator 110 is provided with a winding rod to form a coil spring. ing. Thereby, when the movable yoke 142 moves (vibrates) in the axial direction, the cable 168 expands and contracts to prevent the cable 168 from being disconnected.
[0071]
Next, the operation and action of the vibration isolator 110 according to this embodiment will be described.
[0072]
When vibration from the engine is input via the top plate fitting 139, this vibration is transmitted to the rubber elastic body 134, and the rubber elastic body 134 is elastically deformed. Thereby, the vibration is attenuated by the action based on the internal friction of the rubber elastic body 134, and the vibration transmitted from the engine to the vehicle body 12 is attenuated.
[0073]
On the other hand, when vibration from the engine is transmitted to the vehicle body 12 via the vibration isolator 110, the vibration sensor 72 detects the vibration of the vehicle body 12 and outputs a detection signal to the controller 166. Upon receiving the detection signal from the vibration sensor 72, the controller 166 outputs a drive voltage corresponding to the vibration frequency to the coil 160 of the electromagnet 146 to vibrate the mass member 156 at a frequency equal to the vibration frequency in the vehicle body 12. Thereby, kinetic energy (inertial force) defined by the product of the mass of the mass member 156 and acceleration is generated, and vibration transmitted from the engine to the vehicle body 12 is canceled by this inertial force.
[0074]
The anti-vibration device 110 according to the present embodiment described above has the same effects as the anti-vibration device 10 according to the first embodiment. Furthermore, in the vibration isolator 110 of the present embodiment, since the excitation force to the mass member 156 is generated by the electromagnetic actuator 140, the mass member 156 is vibrated with high responsiveness in a wide frequency range from a low frequency to a high frequency. Is possible. Accordingly, vibrations in a wide frequency range can be effectively canceled with almost no time lag.
[0075]
Further, in the vibration isolator 110 according to the present embodiment, the mass member 156 that generates the inertia force for canceling the input vibration is configured by the movable yoke 142 and the permanent magnet 144 of the electromagnetic actuator 140, so that it can counter the input vibration. An increase in the apparatus weight due to the provision of the mass member 156 can be effectively suppressed. At this time, if only the mass of the movable yoke 142 and the permanent magnet 144 is insufficient, the auxiliary weight member having a mass corresponding to the shortage may be added to the movable yoke 142.
[0076]
In the vibration isolator 110 according to the present embodiment, the mass member 156 can freely vibrate when the active damper function is stopped. Therefore, the mass member 156 resonates when the vehicle body 12 vibrates, and the vibration of the vehicle body 12 is avoided. There is a risk. In order to prevent such a problem, as in the case of the vibration isolator 80 according to the second embodiment, the mass member 156 moves in one direction (for example, downward) along the axial direction when the active damper function is stopped. Since the displacement of the mass member 156 along the axial direction is suppressed by controlling the electromagnetic actuator 140 so as to be biased to the resonance, the resonance of the mass member 156 can be effectively suppressed even when the vehicle body 12 vibrates. Further, in order to stabilize the amplitude and the like of the mass member 156, as in the case of the vibration isolator 80 according to the second embodiment, between the mass member 156 and the bottom plate metal fitting 112 or the movable yoke 142 and the electromagnet along the axial direction. A metallic coil spring may be interposed between the mass member 156 and the mass member 156 (movable yoke 142) elastically supported by the coil spring in addition to the elastic connecting member 154.
[0077]
(Fourth embodiment)
FIG. 4 shows a vibration isolator 170 according to a fourth embodiment of the present invention. In the vibration isolator 170 according to the present embodiment, members having the same structure as those of the vibration isolator 10 according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0078]
As shown in FIG. 4, the vibration isolator 170 has a hollow circular fixed yoke 172 as an attachment member to the vehicle body 12. The fixed yoke 172 is formed in a hollow shape using cast iron or cast steel as a material, and constitutes the outer shell portion of the vibration isolator 170 and also constitutes a part of the electromagnetic actuator 174. The fixed yoke 172 is provided with a substantially cylindrical casing member 176 whose top side is closed, and a disc-shaped lid member 178 that closes the opening on the lower surface side of the casing member 176. A flange portion 180 bent at a right angle to the outer peripheral side of the casing member 176 is formed, and a plurality of insertion holes 182 penetrating in the axial direction are formed in the flange portion 180. The casing member 176 is integrally provided with a cylindrical support portion 184 that protrudes upward from the top plate portion along the axis S, and a cylindrical bearing member 186 is provided on the inner peripheral side of the support portion 184. It is inserted.
[0079]
An insertion hole 188 corresponding to the insertion hole 182 in the casing member 176 is formed in the outer peripheral portion of the lid member 178. The lid member 178 is integrally provided with a cylindrical support portion 190 that protrudes downward along the axis S, and a cylindrical bearing member 186 is fitted on the inner peripheral side of the support portion 184. ing.
[0080]
On the other hand, attachment holes 192 corresponding to the insertion holes 182 and 188 of the fixed yoke 172 are formed in the attachment portion of the vibration isolator 170 in the vehicle body 12 and a plurality of attachment holes 192 arranged along the circumferential direction. An opening portion 194 corresponding to the support portion 190 of the lid member 178 is bored on the inner peripheral side.
[0081]
Here, when attaching the vibration isolator 170 to the vehicle body 12, the bolts 196 are inserted into the insertion holes 188 of the casing member 176 and the lid member 178 from above, and then the fixed yoke 172 is placed on the vehicle body 12. The bolt 210 protruding from the lid member 178 is inserted through the mounting hole 192 formed in the vehicle body 12, and the nut 198 is screwed into the tip of the bolt 196 protruding from the vehicle body 12. At this time, the support portion 190 of the lid member 178 protrudes to the lower side of the vehicle body 12 through the opening 194 of the vehicle body 12. As a result, the fixed yoke 172 is fastened and fixed onto the vehicle body 12. Further, the lid member 178 in the fixed yoke 172 is fixed so as to close the lower surface side of the casing member 176, and a sealed space 200 shielded from the outside is formed in the fixed yoke 172.
[0082]
The movable rod 202 is slidably inserted through the bearing member 186 of the casing member 176 and the bearing member 186 of the lid member 178 so as to penetrate through the fixed yoke 172. Accordingly, the movable rod 202 is supported by the pair of bearing members 186 so as to be coaxial with the axis S and can move in the axial direction.
[0083]
On the top surface of the casing member 176, a disk-shaped connecting metal 204 is fixed so as to be coaxial with the axis S by a method such as welding or screwing. The lower end surface of the thick cylindrical rubber elastic body 206 is vulcanized and bonded to the upper surface of the connection fitting 204. The upper end portion of the movable rod 202 protrudes from the inner peripheral side of the rubber elastic body 206. A disc-shaped top plate fitting 208 is disposed above the rubber elastic body 206, and the upper end surface of the rubber elastic body 206 is vulcanized and bonded to the lower surface of the top plate fitting 208. Bolts 210 are fixed to the upper surface of the top plate fitting 208 so as to protrude along the axis S. The top plate fitting 208 is fastened and fixed to the engine (not shown) side by the bolt 210 and a nut (not shown) screwed into the bolt 210.
[0084]
On the inner peripheral surface of the casing member 176, the outer peripheral surface of the thick cylindrical permanent magnet 212 is fixed to the intermediate portion in the axial direction. A cylindrical support fitting 214 having an outer diameter slightly smaller than the inner diameter of the casing member 176 is inserted into the fixed yoke 172 below the permanent magnet 212. The support metal fitting 214 is fixed to the fixed yoke 172 by bringing the upper end surface into contact with the lower end surface of the permanent magnet 212 and the lower end surface into contact with the lid member 178.
[0085]
On the other hand, an electromagnet 216 is fixed to the outer peripheral surface of the movable rod 202 at an intermediate portion in the axial direction. The electromagnet 216 is supported by the movable rod 202 between the top plate portion of the casing member 176 and the lid member 178 in the fixed yoke 172. In the electromagnet 216, a soft iron core 218 having a substantially thick cylindrical shape is disposed on the inner peripheral side. The movable rod 202 is inserted through the inner peripheral side of the core 218, and the core 218 is fixed onto the outer peripheral surface of the movable rod 202 and moves together with the movable rod 202. On the outer peripheral side of the core 218, a cylindrical coil 220 is provided by winding an insulated conductor around the core 218. The coil 220 is supported so that the outer peripheral surface thereof faces the inner peripheral surface of the permanent magnet 212.
[0086]
A cylindrical connecting portion 222 having a small outer diameter with respect to the upper side is integrally formed at the lower end portion of the core 218. The outer peripheral surface of the connecting portion 222 is vulcanized and bonded to the inner peripheral surface of a rubber elastic connecting member 224 having a thick ring shape. Further, the outer peripheral surface of the elastic connecting member 224 is vulcanized and bonded to the inner peripheral surface of the support fitting 214. As a result, the electromagnet 216 and the movable rod 202 are elastically connected to the fixed yoke 172 via the elastic connecting member 224 and the support fitting 214.
[0087]
A thick disc-like weight member 226 is connected and fixed to the movable rod 202 at a lower end portion protruding downward from the vehicle body 12. In the vibration isolator 170 of the present embodiment, a mass member that generates an inertia force for canceling input vibration is configured by the movable rod 202, the electromagnet 216, and the weight member 226, and the electromagnetic actuator 174 is provided in the fixed yoke and the fixed yoke 172. The permanent magnet 212, the electromagnet 216, the movable rod 202, and the like arranged in the above are configured.
[0088]
The electromagnetic actuator 174 generates an electromagnetic force that biases the electromagnet 216 in one direction along the axial direction between the coil 220 and the permanent magnet 212 when a drive voltage having a predetermined polarity is applied to the coil 220. . As a result, the electromagnet 216 moves in one direction along the axial direction while elastically deforming the elastic connecting member 154 together with the movable rod 202 and the weight member 226.
[0089]
When the polarity of the drive voltage applied to the coil 220 is reversed, an electromagnetic force is generated between the coil 220 and the permanent magnet 212 so as to urge the electromagnet 216 in the other direction along the axial direction. As a result, the electromagnet 216 moves in the other direction along the axial direction by the electromagnetic force and the restoring force of the elastic connecting member 224 together with the movable rod 202 and the weight member 226. Therefore, by applying a drive voltage having a waveform (for example, a pulse waveform) whose polarity is periodically reversed to the coil 220, the electromagnet 216, the movable rod 202, and the weight member 226 constituting the mass member are aligned along the axial direction. And vibrates at a frequency corresponding to the polarity inversion period of the drive voltage.
[0090]
The vibration isolator 170 includes a controller 228 that controls the electromagnetic actuator 174, and a signal line of a vibration sensor 72 installed on the vehicle body 12 is connected to the controller 228. The controller 228 receives the signal from the vibration sensor 72 and determines the frequency and phase of vibration. The controller 228 sets the cycle of the drive voltage to the coil 220 so that the mass member vibrates at a frequency equal to the vibration frequency in the vehicle body 12, and the mass member has a certain deviation from the vibration phase in the vehicle body 12. The phase of the drive voltage is controlled so as to vibrate (including the reverse phase).
[0091]
Here, the controller 228 applies a driving voltage to the coil 220 of the electromagnet 216 via the cable 230, and the portion inserted into the fixed yoke 172 of the cable 230 is provided with a curl so as to have a coil spring shape. Has been. As a result, when the electromagnet 216 moves (vibrates) in the axial direction, the cable 230 expands and contracts to prevent the cable 230 from being disconnected.
[0092]
Next, the operation and action of the vibration isolator 110 according to this embodiment will be described.
[0093]
When vibration from the engine is input via the top plate fitting 208, this vibration is transmitted to the rubber elastic body 206, and the rubber elastic body 206 is elastically deformed. Thereby, the vibration is attenuated by the action based on the internal friction of the rubber elastic body 206, and the vibration transmitted from the engine to the vehicle body 12 is attenuated.
[0094]
On the other hand, when vibration from the engine is transmitted to the vehicle body 12 via the vibration isolation device 170, the vibration sensor 72 detects the vibration of the vehicle body 12 and outputs a detection signal to the controller 228. Upon receiving the detection signal from the vibration sensor 72, the controller 228 outputs a drive voltage corresponding to the vibration frequency to the coil 220 of the electromagnet 216, and the electromagnet 216, the movable rod 202 and the weight member 226 constituting the mass member are connected to the vehicle body 12. Vibrate at the same frequency as the vibration frequency. Thereby, kinetic energy (inertial force) defined by the product of the mass of the mass member and the acceleration is generated, and the vibration transmitted from the engine to the vehicle body 12 is canceled by this inertial force.
[0095]
The anti-vibration device 170 according to the present embodiment described above has the same effects as the anti-vibration device 10 according to the first embodiment. Further, in the vibration isolator 170 according to the present embodiment, since the excitation force to the mass member is generated by the electromagnetic actuator 174, the mass member can be vibrated in a wide frequency range from a low frequency to a high frequency with good responsiveness. become. Accordingly, vibrations in a wide frequency range can be effectively canceled with almost no time lag.
[0096]
Further, in the vibration isolator 110 of the present embodiment, a part of the mass member that generates an inertial force for canceling the input vibration is configured by the electromagnet 216 and the movable rod of the electromagnetic actuator 174, so The increase in the weight of the device due to the mass member that can be formed can be effectively suppressed, and the outer shell portion of the vibration isolator 170 of the fixed yoke 172 is configured, so that the weight of the device can also be reduced. It has become.
[0097]
In the vibration isolator 170 according to the present embodiment, the mass member can freely vibrate when the active damper function is stopped. Therefore, the mass member may resonate when the vehicle body 12 vibrates and the vibration of the vehicle body 12 may be encouraged. There is. In order to prevent such a problem, as in the case of the vibration isolator 80 according to the second embodiment, when the active damper function is stopped, the mass member moves in one direction (for example, downward) along the axial direction. By controlling the electromagnetic actuator 174 so as to be biased, the displacement along the axial direction of the mass member is suppressed, so that the resonance of the mass member can be effectively suppressed even when the vehicle body 12 vibrates. Further, in order to stabilize the amplitude and the like of the mass member 156, similarly to the vibration isolator 80 according to the second embodiment, between the fixed yoke 172 and the electromagnet 216 or the vehicle body 12 and the weight member 226 along the axial direction. A metal coil spring may be interposed therebetween, and the mass member may be elastically supported by the coil spring in addition to the elastic connecting member 224.
[0098]
【The invention's effect】
As described above, according to the vibration isolator of the present invention, the function as the anti-vibration mount and the function as the active damper can be exhibited, and the structure of the apparatus can be simplified.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view along the axial direction of a vibration isolator according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view along the axial direction of a vibration isolator according to a second embodiment of the present invention.
FIG. 3 is a cross-sectional view along the axial direction of a vibration isolator according to a third embodiment of the present invention.
FIG. 4 is a cross-sectional view along the axial direction of a vibration isolator according to a fourth embodiment of the present invention.
[Explanation of symbols]
10 Vibration isolator
12 Car body (vibration receiving part)
14 Mounting bracket (first mounting member)
24 Outer cylinder fitting
30 Rubber elastic body
34 Top plate bracket (second mounting member)
40 Elastic connecting member
42 Seal space
44 Mass member (mass body)
45 Diaphragm (movable partition wall)
46 Gas enclosure
48 Spring bearing member (vibration means)
52 Coil spring (vibration means)
54 Pressure piping (pressure supply)
56 Switching valve (pressure supply part)
58 Intake manifold (pressure source)
60 Pressure supply pipe (pressure supply part)
62 Pressure release pipe (pressure supply part)
82 Electromagnetic actuator
96 Coil spring (spring member)
110 Vibration isolator
112 Bottom plate bracket (mounting member)
116 Guide rod (electromagnetic actuator)
134 Rubber elastic body
138 Seal space
139 Top plate bracket (mounting member)
140 Electromagnetic actuator
142 Movable yoke (electromagnetic actuator, mass body)
144 Permanent magnet (electromagnetic actuator, mass body)
146 Electromagnet (Electromagnetic Actuator)
154 Elastic connecting member
156 Mass member (mass body)
158 Core (electromagnet)
160 Coil (electromagnet)
170 Vibration isolator
172 Fixed yoke (electromagnetic actuator, mounting member)
174 Electromagnetic actuator
200 Sealing space
202 Movable rod (electromagnetic actuator, mass body)
206 Rubber elastic body
208 Top plate bracket (Mounting member)
212 Permanent magnet (electromagnetic actuator)
216 Electromagnet (electromagnetic actuator, mass body)
224 Elastic connecting member
226 Weight member (mass body)

Claims (6)

A first attachment member coupled to one of the vibration generator and the vibration receiver;
A second attachment member coupled to the other of the vibration generating portion and the vibration receiving portion;
A rubber elastic body disposed between the first mounting member and the second mounting member and elastically deformed by an input vibration from a vibration generating unit;
A mass body disposed between the first mounting member and the second mounting member and capable of relative displacement along the amplitude direction of the input vibration from the vibration generating unit;
An elastic connecting member for elastically connecting the mass body to any one of the first and second mounting members;
Vibration means for causing the mass body to vibrate along the amplitude direction in response to vibration of a vibration generating unit;
Have
The vibrating means communicates alternately with the first and second pressure sources having different atmospheric pressures, and alternately communicates the gas sealed chamber with the first pressure source and the second pressure source. And a movable partition that constitutes at least a part of the partition wall of the gas sealing chamber and applies an excitation force along the amplitude direction to the mass body according to a change in atmospheric pressure in the gas sealing chamber And
When the vibration means does not vibrate the mass body along the amplitude direction, the gas-filled chamber is maintained in a negative pressure state with respect to the outside, and the movement resistance in the amplitude direction with respect to the mass body A vibration isolating device characterized in that the device operates .   2. The prevention according to claim 1, wherein a seal space isolated from the outside is provided between the first mounting member and the second mounting member, and the excitation means is disposed in the seal space. Shaker. A first attachment member coupled to one of the vibration generator and the vibration receiver;
A second attachment member coupled to the other of the vibration generating portion and the vibration receiving portion;
A rubber elastic body disposed between the first mounting member and the second mounting member and elastically deformed by an input vibration from a vibration generating unit;
A mass body disposed between the first mounting member and the second mounting member and capable of relative displacement along the amplitude direction of the input vibration from the vibration generating unit;
An elastic connecting member for elastically connecting the mass body to any one of the first and second mounting members;
Vibration means for causing the mass body to vibrate along the amplitude direction in response to vibration of a vibration generating unit;
Have
It said vibrating means is a movable member connected to the front SL mass movably supported along the amplitude direction by electromagnetic force said movable member has an electromagnetic actuator for reciprocating along the amplitude direction ,
When the vibration means does not vibrate the mass body along the amplitude direction, the movable member is urged in one direction along the amplitude direction and moved in the amplitude direction with respect to the mass body. An anti-vibration device characterized by applying a resistance.   4. The prevention according to claim 3, wherein a seal space isolated from the outside is provided between the first mounting member and the second mounting member, and the excitation means is disposed in the seal space. Shaker. The electromagnetic actuator supports an electromagnet that generates an electromagnetic force when a driving voltage is applied, a permanent magnet that is relatively biased along the amplitude direction by the electromagnetic force from the electromagnet, and the permanent magnet. A yoke that is movable along the amplitude direction,
The vibration isolator according to claim 3 or 4, wherein at least a part of the mass body is constituted by the permanent magnet and the yoke. The electromagnetic actuator is relatively energized along the amplitude direction by an electromagnet that generates an electromagnetic force when a drive voltage is applied and is movable along the amplitude direction, and an electromagnetic force from the electromagnet. A permanent magnet, and a yoke that supports the permanent magnet,
The vibration isolator according to claim 3 or 4, wherein at least a part of the mass body is constituted by the electromagnet.

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