JP2018004038A - Vibration isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost.SOLUTION: A vibration isolation device comprises: a first attachment member 11; a second attachment part 12; elastic bodies 14 and 15 that connect the first attachment part 11 and the second attachment part 12; and an actuator 16 that vibrates one of the first attachment member 11 and the second attachment member 12 depending on input vibration from the vibration generating part to damp and absorb the input vibration. An intermediate member 13 is arranged between the first attachment member 11 and the second attachment member 12. The elastic bodies 14 and 15 comprise: the first elastic body 14 that connects the first attachment member 11 and the intermediate member 13; and the second elastic body 15 that connects the second attachment member 12 and the intermediate member 13. The actuator 16 comprises: a stator 23 attached to the other of the first attachment member 11 and the second attachment member 12; and a mover 24 reciprocatably supported by the stator 23. The mover 24 and the intermediate member 13 are connected via a dash pot 25.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration isolator.

Conventionally, a first attachment member attached to the vibration generating part, a second attachment member attached to the vibration receiving part, an elastic body connecting the first attachment member and the second attachment member, and an input from the vibration generation part An anti-vibration device is known that includes an actuator that vibrates any one of a first attachment member and a second attachment member in response to vibration and attenuates and absorbs this input vibration.
As this type of vibration isolator, for example, as shown in Patent Document 1 below, the second mounting member is formed in a bottomed cylindrical shape, and its opening is closed by the elastic body and the first mounting member. A configuration in which a liquid is filled inside is known. The bottom part of the second mounting member is formed so as to be elastically displaceable, and the mover of the actuator is connected, and the actuator is driven according to the input vibration to elastically displace the bottom part of the second mounting member, The fluid pressure in the second mounting member is controlled to attenuate and absorb this input vibration.

JP 2007-085407 A

  However, in the conventional vibration isolator, since the liquid in the second mounting member is filled, there is a problem that the manufacturing cost is increased.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to reduce costs.

In order to solve the above problems, the present invention proposes the following means.
The vibration isolator according to the present invention includes a first attachment member attached to the vibration generating portion, a second attachment member attached to the vibration receiving portion, and an elastic body connecting the first attachment member and the second attachment member. And an actuator that vibrates one of the first mounting member and the second mounting member in response to input vibration from the vibration generating unit, and attenuates and absorbs the input vibration. An apparatus, wherein an intermediate member is disposed between the first mounting member and the second mounting member, and the elastic body includes a first elastic body that connects the first mounting member and the intermediate member; And a second elastic body that connects the second mounting member and the intermediate member, and the actuator is a stator mounted on the other of the first mounting member and the second mounting member And the fixed Reciprocatably provided and supported mover, a said movable element and said intermediate member is characterized in that it is connected via a dash pot.

According to this invention, since the mover is connected to the intermediate member, the actuator directly applies one of the first mounting member and the second mounting member when inputting vibration from the vibration generating unit. Instead of shaking, it can be vibrated through the intermediate member. Therefore, even if the excitation direction of the actuator is a constant reciprocating direction in which the mover reciprocates, input vibrations in various directions from the vibration generating unit can be attenuated and absorbed. As a result, the cost of the vibration isolator can be reduced and the degree of design freedom can be increased. Since such an effect can be achieved without providing a liquid chamber in the vibration isolator, it is possible to reliably reduce the cost of the vibration isolator.
In addition, since the mover and the intermediate member are connected via a dash pot, when a static load such as an initial load of a vibration generating unit is input to the vibration isolator, the mover and the stator are relatively Even if a large displacement is caused in the reciprocating direction, the dashpot can absorb this displacement, and the actuator is driven as expected without increasing the length of the mover in the reciprocating direction. It can be easily realized.

  The vibration isolator according to the present invention includes a first attachment member attached to the vibration generating portion, a second attachment member attached to the vibration receiving portion, and an elastic body connecting the first attachment member and the second attachment member. And an actuator that vibrates one of the first mounting member and the second mounting member in response to input vibration from the vibration generating unit, and attenuates and absorbs the input vibration. An apparatus, wherein an intermediate member is disposed between the first mounting member and the second mounting member, and the elastic body includes a first elastic body that connects the first mounting member and the intermediate member; And a second elastic body that connects the second mounting member and the intermediate member, and the actuator is a stator mounted on the other of the first mounting member and the second mounting member And the fixed And a movable element connected to the intermediate member and removably supported between the other one of the first attachment member and the second attachment member and the stator. A dashpot is provided.

According to this invention, since the mover is connected to the intermediate member, the actuator directly applies one of the first mounting member and the second mounting member when inputting vibration from the vibration generating unit. Instead of shaking, it can be vibrated through the intermediate member. Therefore, even if the excitation direction of the actuator is a constant reciprocating direction in which the mover reciprocates, input vibrations in various directions from the vibration generating unit can be attenuated and absorbed. As a result, the cost of the vibration isolator can be reduced and the degree of design freedom can be increased. Since such an effect can be achieved without providing a liquid chamber in the vibration isolator, it is possible to reliably reduce the cost of the vibration isolator.
In addition, since the dashpot is disposed between the other of the first mounting member and the second mounting member and the stator, the initial load of the vibration generating unit or the like is provided in the vibration isolator, for example. Even when the mover and the stator are relatively displaced in the reciprocating direction when the static load of is input, it becomes possible to absorb this displacement by the dashpot, and in the reciprocating direction of the mover. Even if the length is not increased, the actuator can be easily driven as intended.

  The stator may be attached to the second attachment member, and the actuator may vibrate the first attachment member via the intermediate member.

  In this case, the stator is attached to the second attachment member, and the actuator vibrates the first attachment member via the intermediate member. Therefore, it is possible to effectively suppress the input vibration from the vibration generating unit from being transmitted to the second mounting member.

  A spring constant of the first elastic body in a reciprocating direction in which the stator reciprocates the mover may be larger than a spring constant of the first elastic body in a direction intersecting the reciprocating direction. .

In this case, the spring constant of the first elastic body in the reciprocating direction is larger than the spring constant of the first elastic body in the intersecting direction. Therefore, when the actuator is vibrated, the deformation of the first elastic body is suppressed, and the vibration force from the actuator can be effectively transmitted to the first mounting member without being attenuated by the first elastic body. It is possible to reliably attenuate and absorb the input vibration from the generator.
The spring constant of the first elastic body in the reciprocating direction is larger than the spring constant of the first elastic body in the intersecting direction. Therefore, the first elastic body is easily deformed in the intersecting direction, and the first mounting member and the intermediate member are displaced relatively responsively in the intersecting direction in response to the input vibration from the vibration generating unit. Therefore, it is possible to reliably attenuate and absorb the input vibration from the vibration generating unit.

  A spring constant of the second elastic body in a reciprocating direction in which the stator reciprocates the mover may be smaller than a spring constant of the second elastic body in a direction crossing the reciprocating direction. .

In this case, the spring constant of the second elastic body in the reciprocating direction is smaller than the spring constant of the second elastic body in the intersecting direction. Therefore, the second elastic body can be deformed in the reciprocating direction by the excitation force from the actuator, and the intermediate member and the first mounting member can be displaced with high responsiveness. Can be attenuated and absorbed reliably.
The spring constant of the second elastic body in the reciprocating direction is smaller than the spring constant of the second elastic body in the intersecting direction. Therefore, the second elastic body is hardly deformed in the intersecting direction, and it is possible to suppress the relative displacement of the stator and the mover in the intersecting direction. Can be driven.

  A spring constant of the first elastic body in a reciprocating direction in which the stator reciprocates the mover may be larger than a spring constant of the second elastic body in the reciprocating direction.

  In this case, the spring constant of the first elastic body in the reciprocating direction is larger than the spring constant of the second elastic body in the reciprocating direction. Therefore, when the actuator is vibrated, the deformation of the first elastic body can be suppressed, and the vibration force from the actuator can be effectively transmitted to the first mounting member without being attenuated by the first elastic body. Furthermore, the second elastic body can be deformed in the reciprocating direction by the excitation force from the actuator, so that the intermediate member and the first mounting member can be displaced with high responsiveness. Can be attenuated and absorbed reliably.

  A spring constant of the first elastic body in a direction intersecting a reciprocating direction in which the stator reciprocates the mover may be smaller than a spring constant of the second elastic body in the intersecting direction.

  In this case, the spring constant of the first elastic body in the intersecting direction is smaller than the spring constant of the second elastic body in the intersecting direction. Therefore, the second elastic body is hardly deformed in the intersecting direction, and it is possible to suppress the relative displacement of the stator and the mover in the intersecting direction. Can be driven. In addition, the first elastic body is easily deformed in the intersecting direction, and the first mounting member and the intermediate member are displaced relatively responsively in the intersecting direction in accordance with the input vibration from the vibration generating unit. Therefore, it is possible to reliably attenuate and absorb the input vibration from the vibration generating unit.

  According to the present invention, cost reduction can be achieved.

It is sectional drawing which shows the vibration isolator which concerns on one Embodiment of this invention, and includes a side view partially. It is the figure which modeled the vibration isolator shown in FIG. It is sectional drawing which includes a side view partially showing the vibration isolator which concerns on the 1st modification of this invention. It is sectional drawing which includes a side view partially showing the vibration isolator which concerns on the 2nd modification of this invention.

Hereinafter, an embodiment of a vibration isolator 10 according to the present invention will be described with reference to FIGS. 1 and 2.
The vibration isolator 10 of the present embodiment is used as, for example, a suspension bush for an automobile, an engine mount, or a mount for an industrial machine installed in a factory. The vibration isolator 10 includes a first attachment member 11, a second attachment member 12, an intermediate member 13, elastic bodies 14 and 15, and an actuator 16.

The 1st attachment member 11 is attached to a vibration generation part (for example, engine). The first attachment member 11 is formed in a shaft shape and extends linearly.
The second attachment member 12 is attached to a vibration receiving portion (for example, a vehicle body). The second attachment member 12 is formed in a portal shape. The second attachment member 12 includes a pair of side portions 17 that sandwich the first attachment member 11 therebetween, and a top portion 18 that connects the pair of side portions 17. The pair of side portions 17 sandwich the first mounting member 11 in the radial direction perpendicular to the axial direction of the first mounting member 11. A through hole 19 that penetrates the top 18 is formed in the top 18.

  Hereinafter, the direction in which the first mounting member 11 and the top portion 18 face each other in the radial direction is referred to as a first direction X (reciprocating direction), and the pair of side portions 17 face each other with the first mounting member 11 interposed therebetween. The direction to do is called the 2nd direction Y (direction which crosses reciprocating motion). The second direction Y is a direction that intersects the first direction X and is orthogonal to the first direction X. The second direction Y is orthogonal to both the first direction X and the axial direction.

The intermediate member 13 is disposed between the first mounting member 11 and the second mounting member 12. The intermediate member 13 is formed in a cylindrical shape that opens in the axial direction. A first attachment member 11 is accommodated in the intermediate member 13.
The elastic bodies 14 and 15 connect the first mounting member 11 and the second mounting member 12. The elastic bodies 14 and 15 include a first elastic body 14 that connects the first mounting member 11 and the intermediate member 13, and a second elastic body 15 that connects the second mounting member 12 and the intermediate member 13. Yes.

  The spring constant of the first elastic body 14 in the first direction X is larger than the spring constant of the first elastic body 14 in the second direction Y. The first elastic body 14 includes a pair of first elastic pieces 21 provided on both sides of the first attachment member 11 in the first direction X. The first elastic piece 21 connects the outer surface of the first mounting member 11 and the inner surface of the intermediate member 13.

The spring constant of the second elastic body 15 in the first direction X is smaller than the spring constant of the second elastic body 15 in the second direction Y. The second elastic body 15 includes a pair of second elastic pieces 22 provided on both sides of the intermediate member 13 in the second direction Y. The second elastic piece 22 connects the outer surface of the intermediate member 13 and the inner surface of the second mounting member 12. The second elastic body 15 is connected to the side portion 17.
The spring constant of the first elastic body 14 in the first direction X is larger than the spring constant of the second elastic body 15 in the first direction X, and the spring constant of the first elastic body 14 in the second direction Y is the second elastic body. 15 is smaller than the spring constant in the second direction Y.

  The actuator 16 vibrates one of the first mounting member 11 and the second mounting member 12 in accordance with the input vibration from the vibration generating unit, and attenuates and absorbs this input vibration. In the present embodiment, the actuator 16 vibrates the first mounting member 11 in the first direction X via the intermediate member 13. The actuator 16 can attenuate and absorb the input vibration, for example, by inputting a vibration having an opposite phase to the input vibration to the first mounting member 11.

  The actuator 16 includes a stator 23 and a mover 24. The stator 23 is attached to the second mounting member 12 which is the other of the first mounting member 11 and the second mounting member 12. The stator 23 is formed in a cylindrical shape that opens toward both sides in the first direction X. The stator 23 is directly fixed to the top 18.

  The mover 24 is supported by the stator 23 so as to be able to reciprocate and is connected to the intermediate member 13. The mover 24 is formed in an axial shape extending in the first direction X. The mover 24 is disposed in the stator 23 so as to be movable in the first direction X. The mover 24 is supported by the stator 23 via a leaf spring 23a. The leaf spring 23 a is fixed to the stator 23 in the first direction X. The leaf spring 23 a is elastically deformed in the first direction X as the mover 24 moves in the first direction X. The leaf spring 23a regulates the amount of movement of the mover 24 in the first direction X.

  The mover 24 and the intermediate member 13 are connected via a dash pot 25 (viscous element). The dash pot 25 is configured by a viscous damper 26 (for example, a hydraulic damper, a gas damper, or an air damper). The viscous damper 26 is formed in a shaft shape that can expand and contract in the first direction X. The viscous damper 26 is installed in the first direction X between the mover 24 and the intermediate member 13, and passes through the through hole 19 in the first direction X. The first end of the viscous damper 26 is connected to the mover 24. The second end of the viscous damper 26 is connected to the outer surface of the intermediate member 13.

  The vibration isolator 10 can be modeled as shown in FIG. In FIG. 2, k <b> 1 is a spring (elastic element) by the first elastic body 14, and C <b> 1 is a dashpot (viscous element) by the first elastic body 14. k2 is a spring formed by the second elastic body 15, and C2 is a dashpot formed by the second elastic body 15. k3 is a spring by the actuator 16 including a spring by the leaf spring 23a, and F is an output of the actuator 16. C0 is a dash pot 25 by the viscous damper 26. m2 is the mass of the intermediate member 13, and m3 is the mass of the mover 24.

  As described above, according to the vibration isolator 10 according to the present embodiment, since the mover 24 is connected to the intermediate member 13, the actuator 16 is the first when the vibration is input from the vibration generating unit. The attachment member 11 (one of the first attachment member 11 and the second attachment member 12) can be vibrated through the intermediate member 13 instead of being directly vibrated. Therefore, even if the excitation direction of the actuator 16 is the fixed first direction X in which the movable element 24 reciprocates, input vibrations from various directions from the vibration generating unit can be attenuated and absorbed. Thereby, the cost of the vibration isolator 10 can be reduced, and the degree of design freedom can be increased. Since such an effect is exhibited without providing a liquid chamber in the vibration isolator 10, the cost of the vibration isolator 10 can be reliably reduced.

  Further, since the mover 24 and the intermediate member 13 are connected via the dash pot 25, when a static load such as an initial load of a vibration generating unit is input to the vibration isolator 10, the mover 24 is used. Even when the stator 23 is relatively displaced in the first direction X, the dashpot 25 can absorb this displacement, and the length of the mover 24 in the first direction X is not increased. In addition, the actuator 16 can be easily driven as intended.

  The stator 23 is attached to the second attachment member 12, and the actuator 16 vibrates the first attachment member 11 via the intermediate member 13. Therefore, it is possible to effectively suppress the input vibration from the vibration generating unit from being transmitted to the second mounting member 12.

  Further, the spring constant of the first elastic body 14 in the first direction X is larger than the spring constant of the first elastic body 14 in the second direction Y. Therefore, when the actuator 16 is vibrated, the deformation of the first elastic body 14 is suppressed, and the vibration force from the actuator 16 is effectively transmitted to the first mounting member 11 without being attenuated by the first elastic body 14. As a result, it is possible to reliably attenuate and absorb the input vibration from the vibration generating unit. In addition, the first elastic body 14 is easily deformed in the second direction Y, and the first mounting member 11 and the intermediate member 13 are relatively responsive in the second direction Y according to the input vibration from the vibration generating unit. It is possible to displace with good performance, and it is possible to reliably attenuate and absorb the input vibration from the vibration generating unit.

  The spring constant of the second elastic body 15 in the first direction X is smaller than the spring constant of the second elastic body 15 in the second direction Y. Therefore, the second elastic body 15 can be deformed in the first direction X by the excitation force from the actuator 16, and the intermediate member 13 and the first mounting member 11 can be displaced with high responsiveness. Can be damped and absorbed reliably. In addition, it becomes difficult to deform the second elastic body 15 in the second direction Y, and the relative displacement of the stator 23 and the mover 24 in the second direction Y can be suppressed. It can be driven stably over a long period of time.

  Further, the spring constant of the first elastic body 14 in the first direction X is larger than the spring constant of the second elastic body 15 in the first direction X. Accordingly, when the actuator 16 is vibrated, the deformation of the first elastic body 14 is suppressed, and the vibration force from the actuator 16 is effectively transmitted to the first mounting member 11 without being attenuated by the first elastic body 14. it can. Furthermore, the second elastic body 15 can be deformed in the first direction X by the excitation force from the actuator 16, and the intermediate member 13 and the first mounting member 11 can be displaced with high responsiveness, and the vibration generating portion Can be damped and absorbed reliably.

  The spring constant of the first elastic body 14 in the second direction Y is smaller than the spring constant of the second elastic body 15 in the second direction Y. Therefore, the second elastic body 15 is hardly deformed in the second direction Y, and the relative displacement of the stator 23 and the mover 24 in the second direction Y can be suppressed. Can be driven stably. Further, the first elastic body 14 is easily deformed in the second direction Y, and the first mounting member 11 and the intermediate member 13 are relatively responsive in the second direction Y in response to input vibration from the vibration generating unit. It is possible to displace well, and it is possible to reliably attenuate and absorb the input vibration from the vibration generating unit.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  In the said embodiment, although the needle | mover 24 was formed in the axial shape extended in the 1st direction X, this invention is not limited to this. For example, like the vibration isolator 30 illustrated in FIG. 3, the mover 24 may be formed in a crested cylindrical shape. In this case, the viscous damper 26 can be fixed to the mover 24 while being inserted into the mover 24.

  In the said embodiment, although the needle | mover 24 and the intermediate member 13 are connected via the dashpot 25, this invention is not limited to this. For example, as in the vibration isolator 40 shown in FIG. 4, a dash is provided between the second mounting member 12 which is the other of the first mounting member 11 and the second mounting member 12 and the stator 23. A pot 25 may be provided. The dash pot 25 is constituted by a viscous damper 26. The dash pot 25 is disposed between the top 18 and the stator 23. A plurality of dash pots 25 can be arranged, for example, at intervals in the circumferential direction. The mover 24 and the intermediate member 13 are connected via a connecting rigid body 27.

In the embodiment, the pair of first elastic pieces 21 are provided on both sides of the first attachment member 11 in the first direction X, but the present invention is not limited to this. For example, the pair of first elastic pieces 21 can be provided on both sides of the first attachment member 11 in the second direction Y.
The spring constant of the first elastic body 14 in the first direction X, the spring constant of the first elastic body 14 in the second direction Y, the spring constant of the second elastic body 15 in the first direction X, and the second elastic body 15 The spring constant in the two directions Y is not limited to the magnitude relationship shown in the embodiment.

  In the above embodiment, the stator 23 is attached to the second attachment member 12 and the actuator 16 vibrates the first attachment member 11 via the intermediate member 13, but the present invention is not limited to this. For example, the stator 23 may be attached to the first attachment member 11 and the actuator 16 may vibrate the second attachment member 12 via the intermediate member 13.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

10, 30, 40 Vibration isolator 11 First mounting member 12 Second mounting member 13 Intermediate member 14 First elastic body 15 Second elastic body 16 Actuator 23 Stator 24 Movable element 25 Dashpot X First direction (reciprocating direction) )
Y second direction (crossing direction)

Claims (7)

A first attachment member attached to the vibration generator;
A second attachment member attached to the vibration receiving portion;
An elastic body connecting the first mounting member and the second mounting member;
A vibration isolator comprising: an actuator that vibrates one of the first mounting member and the second mounting member in response to input vibration from a vibration generating unit, and attenuates and absorbs the input vibration. There,
An intermediate member is disposed between the first mounting member and the second mounting member;
The elastic body includes a first elastic body that connects the first mounting member and the intermediate member, and a second elastic body that connects the second mounting member and the intermediate member,
The actuator includes a stator attached to one of the first attachment member and the second attachment member, and a mover supported to be reciprocally movable by the stator,
The vibration isolator is characterized in that the mover and the intermediate member are connected via a dash pot. A first attachment member attached to the vibration generator;
A second attachment member attached to the vibration receiving portion;
An elastic body connecting the first mounting member and the second mounting member;
A vibration isolator comprising: an actuator that vibrates one of the first mounting member and the second mounting member in response to input vibration from a vibration generating unit, and attenuates and absorbs the input vibration. There,
An intermediate member is disposed between the first mounting member and the second mounting member;
The elastic body includes a first elastic body that connects the first mounting member and the intermediate member, and a second elastic body that connects the second mounting member and the intermediate member,
The actuator includes a stator attached to one of the first attachment member and the second attachment member, and a mover supported by the stator so as to reciprocate and coupled to the intermediate member. And comprising
A vibration isolator comprising a dashpot disposed between the other of the first mounting member and the second mounting member and the stator. The stator is attached to the second attachment member;
The vibration isolator according to claim 1 or 2, wherein the actuator vibrates the first attachment member via the intermediate member.   A spring constant of the first elastic body in a reciprocating direction in which the stator reciprocates the mover is larger than a spring constant of the first elastic body in a direction intersecting the reciprocating direction. The vibration isolator according to claim 3.   A spring constant of the second elastic body in a reciprocating direction in which the stator reciprocates the mover is smaller than a spring constant of the second elastic body in a direction intersecting the reciprocating direction. The vibration isolator according to claim 3 or 4.   The spring constant in the reciprocating direction in which the stator reciprocates the movable element of the first elastic body is larger than the spring constant in the reciprocating direction of the second elastic body. 6. The vibration isolator according to any one of 5 above.   A spring constant of the first elastic body in a direction intersecting a reciprocating direction in which the stator reciprocates the mover is smaller than a spring constant of the second elastic body in the intersecting direction. The vibration isolator according to any one of claims 3 to 6.

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