JP2013044390A - Vibration proof device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration proof device that effectively exhibits absorption and damping characteristics for vibration from a vibration generation unit such as an engine, and that is applied to a vehicle, industrial equipment or the like.SOLUTION: In the vibration proof device 10, opposite parts 24 and 25 mutually facing in one direction (A) are separately provided on both mounting members 11 and 12, a stopper elastic body 32 regulating further movement of both the mounting members 11 and 12 when both the mounting members 11 and 12 relatively move in the one direction (A) and the opposite parts 24 and 25 approach closest each other is disposed on at least one of the opposite parts 24 and 25, a pressure receiving liquid chamber 33 filled with liquid is disposed inside the stopper elastic body 32, the pressure receiving liquid chamber 33 communicates with a liquid filled space 37 provided on the installation member disposed with the stopper elastic body 32 among both the mounting members 11 and 12 and enclosed with the liquid, and the stopper elastic body 32 is subjected to elastic deformation or recovery deformation by both the mounting members 11 and 12 to reduce the volume of the pressure receiving liquid chamber 33 until both the mounting members 11 and 12 relatively move in the one direction (A) and the opposite parts 24 and 25 approach closest each other.

Description

  The present invention relates to a vibration isolator that is applied to, for example, automobiles and industrial machines and absorbs and attenuates vibrations of a vibration generating unit such as an engine.

  Conventionally, for example, as shown in Patent Document 1 below, a first mounting member connected to one of a vibration generating unit and a vibration receiving unit, and a second mounting member connected to the other are provided. Both mounting members are provided with opposing portions that face each other in one direction, and at least one of these facing portions moves relative to each other in the one direction. There is known a configuration in which a stopper elastic body is provided that restricts further movement of both attachment members when the two are closest to each other.

JP 2008-144899 A

  However, in the conventional vibration isolator, there is room for improvement in the improvement of the damping characteristic with respect to the unidirectional vibration input to the vibration isolator.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the vibration isolator which can exhibit a damping characteristic effectively.

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 mounting member connected to one of the vibration generating unit and the vibration receiving unit, and a second mounting member connected to the other. Each of which is provided with a facing portion that faces each other in one direction, and at least one of these facing portions moves relative to each other in the one direction so that the facing portions are positioned at the most. An anti-vibration device in which a stopper elastic body that restricts further movement of the two attachment members when approached is provided, and a pressure receiving liquid chamber in which a liquid is sealed is provided in the stopper elastic body. The pressure receiving liquid chamber is provided in a mounting member provided with the stopper elastic body of the both mounting members and communicates with a liquid sealed space in which liquid is sealed, and the stopper elastic body is connected to the both mounting members. Is relatively moved in the one direction. The facing portions in the up closest together, by both said mounting member is elastically deformed or restored deformation and decreases the volume of the pressure receiving liquid chamber.

In this invention, when vibration is input to the vibration isolator in the one direction, and both attachment members move relative to each other in the one direction so that the opposing portions approach each other, the opposing portions come closest to each other and stop. The stopper elastic body is elastically deformed or restored by both the mounting members until the movement of the both mounting members is restricted by the elastic body, thereby reducing the volume of the pressure receiving liquid chamber. As a result, the pressure in the pressure-receiving liquid chamber rises and the liquid in the pressure-receiving liquid chamber flows out into the liquid-sealed space, so that vibration is absorbed and attenuated.
Thereafter, when the two attachment members move relatively in the one direction so that the facing portions are separated from each other, the stopper elastic body is restored or elastically deformed, and the volume of the pressure-receiving liquid chamber returns to before the decrease. So as to increase. As a result, the pressure in the pressure-receiving liquid chamber decreases and the liquid in the liquid-sealed space flows into the pressure-receiving liquid chamber, so that vibration is absorbed and attenuated.

  As described above, when vibration is input to the vibration isolator in the one direction and the two attachment members move relatively in the one direction, the liquid is made to flow between the pressure receiving liquid chamber and the liquid seal space. Therefore, the attenuation characteristic can be exhibited effectively.

  Further, the stopper elastic body is formed in a cylindrical shape with an axis extending in the one direction, and an opening end is connected to the facing portion where the stopper elastic body is disposed, A main body defining the pressure-receiving liquid chamber is provided between the opposing portions, and the stopper elastic body is elastically deformed by being sandwiched in the one direction between the opposing portions of the main body. Thus, the volume of the pressure receiving liquid chamber may be reduced.

  In this case, the stopper elastic body reduces the volume of the pressure receiving liquid chamber by being sandwiched in the one direction between the opposing parts and elastically deforming, so that the volume of the pressure receiving liquid chamber is reduced. By elastically deforming in the existing direction, the volume of the pressure receiving liquid chamber can be reduced, and the volume change of the pressure receiving liquid chamber can be stabilized to more effectively exhibit the damping characteristic.

  Further, the pressure receiving liquid chamber is connected to one of the top wall portion of the main body portion and the opposing portion, and the one-way gap is provided between the engagement portion provided on the other side. The provided restricting portion is disposed, and the stopper elastic body has the main body portion in the one direction when the both attachment members relatively move in the one direction and the opposing portions come closest to each other. Further movement of the mounting members may be restricted by elastically deforming and engaging the restricting part and the engaging part.

  In this case, when both mounting members move relatively in the one direction and the opposing portions come closest to each other, the main body is elastically deformed in the one direction, and the restricting portion and the engaging portion are engaged. Thus, since the stopper elastic body restricts further movement of both attachment members, the restricting portion can be stretched in the one direction between the opposing portions, and further movement of both attachment members can be performed. It can be regulated reliably.

  Further, the opposing portion of the first mounting member is disposed in a pair so as to sandwich the sandwiched portion provided in the second mounting member in the one direction, and the opposing portion of the second mounting member is A pair of the sandwiched portions are disposed at each portion facing both sides in the one direction, and the stopper elastic body restricts movement of the second mounting member toward both sides in the one direction with respect to the first mounting member. A pair of the pressure receiving liquid chambers may be provided in each of the stopper elastic bodies.

  In this case, since the pressure receiving liquid chambers are separately provided in both stopper elastic bodies, vibration is input to the vibration isolator in the one direction, and both mounting members move relatively in the one direction. In addition, even if the second mounting member moves to either side in the one direction with respect to the first mounting member, it is possible to effectively absorb and attenuate the vibration due to the volume change of the pressure receiving liquid chamber.

  The stopper elastic bodies are disposed on the same mounting member of the mounting members, and the pressure receiving liquid chambers separately disposed in the stopper elastic bodies are arranged in the liquid sealing space. May be in communication with each other.

  In this case, since the pressure receiving liquid chambers arranged separately in the both stopper elastic bodies are communicated with each other through the liquid seal space, the configuration of the vibration isolator can be simplified.

  The axial line extends in the other direction orthogonal to the one direction, and includes a cylindrical portion disposed in the other direction so as to be shifted from the facing portions of the two attachment members. A main liquid chamber that is directly connected to the first mounting member and connected to the second mounting member via an elastic body, and in which the elastic body is a part of the wall surface and liquid is enclosed in the cylindrical portion. The vibration may be absorbed and damped by being formed and the main liquid chamber changing in hydraulic pressure.

In this case, vibration is input to the vibration isolator in the other direction, and the cylindrical portion directly connected to the first mounting member and the second mounting member are elastically deforming the elastic body in the other direction, and If it moves relatively in the other direction, the main liquid chamber expands and contracts and the hydraulic pressure fluctuates, and vibration is absorbed and attenuated.
In this way, the vibration in the other direction can also be absorbed and damped, so that the vibration in the two directions of the one direction and the other direction can be absorbed and damped.

  According to the vibration isolator which concerns on this invention, a damping characteristic can be exhibited effectively.

It is a fragmentary longitudinal cross-sectional view of the vibration isolator which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view of the vibration isolator shown in FIG. It is a schematic diagram which shows typically the vibration isolator shown in FIG. It is a schematic diagram which shows typically the vibration isolator which concerns on the modification of this invention. It is a schematic diagram which shows typically the vibration isolator which concerns on the modification of this invention. It is a front view which shows the vibration isolator which concerns on the modification of this invention.

Hereinafter, a vibration isolator according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the vibration isolator 10 includes a first attachment member 11 connected to one of the vibration generator and the vibration receiver, a second attachment member 12 connected to the other, and a first attachment. A cylindrical portion 13 directly connected to the member 11, an elastic body 14 connecting the cylindrical portion 13 and the second mounting member 12, and a liquid chamber 15 in the cylindrical portion 13 in which the liquid L is sealed A partition member 18 that divides the main liquid chamber 16 and the sub liquid chamber 17 along the O direction (the other direction), and an orifice passage 19 that communicates the main liquid chamber 16 and the sub liquid chamber 17 are provided. Yes.

  In addition, the cylindrical part 13, the elastic body 14, and the partition member 18 are formed in a top view circular shape or annular | circular shape, and are arrange | positioned coaxially with a common axis. Hereinafter, this common axis is referred to as an axis O, and the main liquid chamber 16 side with respect to the partition member 18 is referred to as one side and the auxiliary liquid chamber 17 side is referred to as the other side along the axis O direction. The direction to do is called the circumferential direction.

  The elastic body 14 is vulcanized and bonded separately to the outer peripheral surface of the second mounting member 12 and the inner peripheral surface of the cylindrical portion 13. In the present embodiment, the second mounting member 12 and the cylindrical portion 13 are arranged so as to be shifted from each other in the direction of the axis O, and the cylindrical portion 13 is located on the other side with respect to the second mounting member 12. The elastic body 14 is vulcanized and bonded to the outer peripheral surface of the other end portion on the other side of the second mounting member 12 and the inner peripheral surface of the one end opening portion on the one side of the tubular portion 13.

The one end opening of the cylindrical portion 13 is closed by the elastic body 14, and the other end opening on the other side of the cylindrical portion 13 is closed by the diaphragm 20.
The diaphragm 20 is formed in a circular shape when viewed from above, and is an inverted bowl-shaped body that opens toward the other side. The inner peripheral surface of the ring plate 20a is vulcanized and bonded to the outer peripheral edge of the diaphragm 20 over the entire periphery, and the ring plate 20a is fitted into the other end opening of the tubular portion 13. Thus, the diaphragm 20 closes the other end opening.

The liquid chamber 15 is a portion located between the diaphragm 20 and the elastic body 14 in the cylindrical portion 13, and is closed liquid-tightly from both sides in the axis O direction by the diaphragm 20 and the elastic body 14. Has been.
The partition member 18 is formed in an annular shape and is fitted in the tubular portion 13, and a disk-shaped rubber that is disposed in the partition member body 18 a and closes the partition member body 18 a. Member 18b.

In the main liquid chamber 16, the hydraulic pressure varies with the input of vibration in the direction of the axis O to the vibration isolator 10. In the present embodiment, the main liquid chamber 16 has the elastic body 14 as a part of the wall surface, and the hydraulic pressure fluctuates because the internal volume changes due to the deformation of the elastic body 14 when the vibration in the direction of the axis O is input. To do.
The sub-liquid chamber 17 has the diaphragm 20 as a part of the wall surface, and expands and contracts when the diaphragm 20 is deformed in accordance with the fluid pressure fluctuation.

  The orifice passage 19 causes liquid column resonance when the liquid L flows. The flow path length and the flow path cross-sectional area of the orifice passage 19 are set (tuned) so that the resonance frequency of the orifice passage 19 becomes a predetermined frequency. Examples of the predetermined frequency include a frequency of idle vibration (for example, a frequency of 18 Hz to 30 Hz and an amplitude of ± 0.5 mm or less), and a shake vibration having a frequency lower than that of the idle vibration (for example, a frequency of 14 Hz or less, A frequency of which the amplitude is larger than ± 0.5 mm).

  The orifice passage 19 is formed between the outer peripheral surface side of the partition member 18 and the inner peripheral surface side of the cylindrical portion 13 so as to extend along the circumferential direction. In the illustrated example, a circumferential groove is formed on the outer peripheral surface of the partition member main body 19 a, and the orifice passage 19 has an opening portion of the circumferential groove formed by a coating film 21 that covers the inner peripheral surface of the tubular portion 13. It is formed by being blocked. The covering film 21 is formed integrally with the elastic body 14, and the inner peripheral surface of the cylindrical portion 13 is covered over the entire area by the elastic body 14 and the covering film 21. The elastic body 14 and the coating film 21 can be formed of, for example, a rubber material or a synthetic resin material.

The second mounting member 12 is formed in a columnar shape arranged coaxially with the axis O, and is formed to have a smaller diameter than the cylindrical portion 13 in the illustrated example.
Further, in the second mounting member 12, either the vibration generating portion or the vibration receiving portion is connected to the protruding portion (sandwich portion) 22 that is located on the one side of the other end portion and protrudes from the elastic body 14. A connecting hole 23 extending in a first orthogonal direction orthogonal to the axis O is provided. In the present embodiment, the second mounting member 12 has a quadrangular prism shape having a pair of first side surfaces (not shown) arranged with the axis O sandwiched in the first orthogonal direction, and the connection hole 23 includes: Each of the pair of first side surfaces is opened.

  Here, the mounting members 11 and 12 of the first mounting member 11 and the second mounting member 12 are mutually connected in a second orthogonal direction (one direction) A orthogonal to both the axis O direction and the first orthogonal direction. Opposing portions 24 and 25 facing each other are provided separately. The opposing portions 24 and 25 of both the attachment members 11 and 12 are shifted in the direction of the axis O from the cylindrical portion 13, and in this embodiment, are shifted to the one side with respect to the cylindrical portion 13.

A pair of opposing portions 25 of the second mounting member 12 are disposed in each portion of the protruding portion 22 facing both sides of the second orthogonal direction A. In the illustrated example, in the protruding portion 22, the axis O Are formed by a pair of second side surface portions arranged so as to be sandwiched in the second orthogonal direction A, and are formed in a planar shape extending so as to be orthogonal to the second orthogonal direction A.
A pair of opposing portions 24 of the first mounting member 11 are disposed so as to sandwich the protruding portion 22 in the second orthogonal direction A. In the illustrated example, the front and back surfaces are in the second orthogonal direction A. Two plate-like bodies 26 and 27 extending so as to be orthogonal to each other are configured to overlap each other in the second orthogonal direction A.

  Both opposing portions 24 of the first attachment member 11 are connected via a connection portion 28 extending in the second orthogonal direction A. The connecting portion 28 connects the one end portions of the facing portions 24 of the first mounting member 11 to each other, and is connected to the protruding portion 22 of the second mounting member 12 in the direction of the axis O. It is arranged with a gap. The connection portion 28 is configured by two plate-like bodies 29 and 30 extending so that the front and back surfaces are orthogonal to the direction of the axis O, and are overlapped in the direction of the axis O, and are positioned on the other side. The inner plate-like body 29 is connected to the inner plate-like body 26 located on the inner side along the second orthogonal direction A out of the two plate-like bodies 26 and 27 of the facing portion 24, and the one side The outer plate-like body 30 located on the outer plate-like body 27 is connected to the outer plate-like body 27 located on the outer side along the second orthogonal direction A among the two plate-like bodies 26 and 27 of the facing portion 24.

  In addition, a leg portion 31 connected to the tubular portion 13 is connected to each of the other end portions on the other side of the opposing portions 24 of the first mounting member 11. A pair of leg portions 31 are disposed so as to sandwich the cylindrical portion 13 in the second orthogonal direction A, and one end portion on the one side of the leg portion 31 is connected to the inner plate-like body 26 of the facing portion 24. ing. In addition, the other end of the other side of the leg portion 31 is positioned on the other side of the tubular portion 13 and is bent toward the outside along the second orthogonal direction A.

  As described above, the first mounting member 11 includes the pair of facing portions 24, the connection portion 28, and the pair of leg portions 31, and opens toward the other side when viewed from the first orthogonal direction. It is formed in an inverted U shape. The pair of leg portions 31 sandwich the tubular portion 13 in the second orthogonal direction A, so that the tubular portion 13 is directly connected to the first mounting member 11.

  Here, in the first attachment member 11 and the second attachment member 12, both attachment members 11, 12 are disposed on at least one of the opposing portions 24, 25 facing each other in the second orthogonal direction A. A stopper elastic body 32 that restricts further movement of the mounting members 11 and 12 when the opposing portions 24 and 25 are closest to each other by moving relatively in the orthogonal direction A is disposed. In the present embodiment, a pair of stopper elastic bodies 32 are disposed so as to restrict movement of the second mounting member 12 toward both sides in the second orthogonal direction A relative to the first mounting member 11.

  Both the stopper elastic bodies 32 are disposed on the same mounting member among the mounting members 11 and 12, and are disposed on the first mounting member 11 in the illustrated example. Further, the two stopper elastic bodies 32 are provided one by one at both opposing portions 24 of the first mounting member 11 and are the same shape and size as each other and are symmetrical with respect to the axis O in the front view. In addition, they are arranged so as to be point-symmetric with respect to the axis O in a top view as viewed from the direction of the axis O.

A pressure receiving liquid chamber 33 filled with liquid is disposed in the stopper elastic body 32. In the illustrated example, the pressure receiving liquid chambers 33 are separately disposed in both stopper elastic bodies 32. .
In the present embodiment, as shown in FIG. 2, the stopper elastic body 32 is formed in a cylindrical shape with an axis extending in the second orthogonal direction A, and the opening end portion is provided with the stopper elastic body. A main body part 34 is provided which is connected to the opposing part 24 provided with 32 and defines the pressure receiving liquid chamber 33 between the opposing part 24. In the illustrated example, the inner plate-like body 26 of the opposing portion 24 of the first mounting member 11 has an opening 26b penetrating in the second orthogonal direction A, and the opening end of the stopper elastic body 32 is The opening 26b is connected to the peripheral edge of the opening by, for example, vulcanization adhesion.

An inner diameter and an outer diameter of the peripheral wall portion of the main body portion 34 are the same over the entire length along the second orthogonal direction A. Further, the top surface 34b of the top wall portion 34a of the main body portion 34 faces the inside along the second orthogonal direction A and extends so as to be orthogonal to the second orthogonal direction A, and the top wall portion A gap V <b> 1 in the second orthogonal direction A is provided between the top surface 34 b of 34 a and the facing portion 25 of the second mounting member 12. The size of the gap V1 along the second orthogonal direction A is the same regardless of the position along the axis O direction, and is equal regardless of the position along the first orthogonal direction. ing.
Accordingly, the pressure receiving liquid chamber 33 is an exposed portion of the outer plate-like body 27 of the facing portion 24 of the first mounting member 11 exposed from the opening 26b in the second orthogonal direction A, the main body 34, It is defined between.

  In addition, the pressure receiving liquid chamber 33 is connected to the top wall 34 a of the main body 34 that is one of the top wall 34 a of the main body 34 and the opposing portion 24, and to the opposing portion 24 that is the other. Between the provided engaging portion 35, a restricting portion 36 in which a gap V2 in the second orthogonal direction A is provided is disposed.

The restricting portion 36 is integrally formed of the same material as that of the main body portion 34, and protrudes outward from the top wall portion 34 a of the main body portion 34 along the second orthogonal direction A. The restricting portion 36 is formed in a column shape extending in the second orthogonal direction A, and an end surface 36a facing outward along the second orthogonal direction A extends so as to be orthogonal to the second orthogonal direction A. ing.
The engaging portion 35 is the exposed portion of the facing portion 24 of the first mounting member 11, and the size of the gap V2 along the second orthogonal direction A is at a position along the axis O direction. Regardless of the position, the distance is equal regardless of the position along the first orthogonal direction, and in the illustrated example, it is larger than the gap V1.

  As shown in FIGS. 2 and 3, the pressure receiving liquid chamber 33 is provided in the first mounting member 11, which is the mounting member in which the stopper elastic body 32 is disposed, of the mounting members 11 and 12. It communicates with the sealed liquid sealing space 37. In the present embodiment, the liquid sealing space 37 communicates with the pressure receiving liquid chambers 33 disposed separately in the stopper elastic bodies 32.

  The liquid seal space 37 is provided with a restriction passage 38 that absorbs and attenuates vibration when the liquid flows. In the present embodiment, the restriction passage 38 causes liquid column resonance when the liquid flows. The flow path length and the cross-sectional area of the restriction passage 38 are such that the resonance frequency of the restriction passage 38 is, for example, idle vibration or shake. The frequency is set (tuned) so as to have a predetermined frequency such as a vibration frequency.

  As shown in FIG. 2, both end portions 38 a of the restriction passage 38 are directly connected to the pressure receiving liquid chamber 33. These both end portions 38a are disposed on each one side portion located on the one side of the opening portion 26b in the opposing portions 24 of the first mounting member 11, and in these one side portions, the inner plate It is defined between the shaped body 26 and the outer plate-like body 27. In the illustrated example, the central portion 26a in the first orthogonal direction of the inner plate-like body 26 in the one side portion gradually extends along the second orthogonal direction A from the outer side to the inner side in the first orthogonal direction. Both ends 38a of the restriction passage 38 are linearly defined along the axis O direction between the central portion 26a and the outer plate-like body 27.

  Further, in the restricting passage 38, an intermediate portion 38b located between the both end portions 38a is disposed in the connecting portion 28 of the first mounting member 11, and in this connecting portion 28, the inner plate-like body 29 and the outer plate-like shape are provided. It is defined between the body 30. In the illustrated example, the center portion 29a in the first orthogonal direction of the inner plate-like body 29 in the connecting portion 28 is gradually curved toward the other side from the outside in the first orthogonal direction toward the inside. An intermediate portion 38 b of the restriction passage 38 is linearly defined along the second orthogonal direction A between the central portion 29 a and the outer plate-like body 30.

  Here, the vibration isolator 10 is a compression type (upright type) attached so that the main liquid chamber 16 is positioned on the upper side in the vertical direction and the sub liquid chamber 17 is positioned on the lower side in the vertical direction. When the device 10 is attached to, for example, an automobile, the first attachment member 11 is connected to an engine as a vibration generating unit, while the second attachment member 12 is connected to a vehicle body as a vibration receiving unit. In an automobile, main vibration along the vertical direction and side vibration along the front-rear direction or the left-right direction of the vehicle body are easily input from the engine to the vehicle body. Accordingly, the vibration isolator 10 is attached, for example, so that the second orthogonal direction A coincides with the front-rear direction or the left-right direction, and main vibration is input in the direction of the axis O, and the second orthogonal direction A secondary vibration is input to A.

  The cylindrical portion 13 directly input to the vibration isolator 10 and directly connected to the first mounting member 11 and the second mounting member 12 are elastically deforming the elastic body 14 in the direction of the axis O, and When it moves relatively in the direction of the axis O, the main liquid chamber 16 expands and contracts and the hydraulic pressure fluctuates. As a result, the liquid L flows through the orifice passage 19 between the main liquid chamber 16 and the sub liquid chamber 17, and liquid column resonance occurs to absorb and attenuate the vibration.

When a secondary vibration is input to the vibration isolator 10, both the attachment members 11 and 12 move relatively in the second orthogonal direction A while elastically deforming the elastic body 14 in the second orthogonal direction A. To do.
At this time, when the amplitude of the input sub vibration is large, the first attachment member 11 and the second attachment are disposed on the displacement side where the second attachment member 12 is displaced along the second orthogonal direction A with respect to the axis O. The facing portions 24 and 25 of the member 12 approach each other in the second orthogonal direction A, and the gap V1 between the facing portion 25 of the second mounting member 12 and the top surface 34b of the stopper elastic body 32 is gradually reduced. After that, the facing portion 25 and the top surface 34b come into contact with each other.

Then, the main body portion 34 is sandwiched between the opposing portions 24 and 25 in the second orthogonal direction A, and the main body portion 34 is elastically deformed in the second orthogonal direction A by both the mounting members 11 and 12. It is done. At this time, in the present embodiment, for example, the volume of the pressure receiving liquid chamber 33 decreases due to the elastic deformation of the peripheral wall portion of the main body portion 34 toward the inside in the radial direction of the main body portion 34. In this way, the stopper elastic body 32 has the two attachment members 11, 12 until the two attachment members 11, 12 relatively move in the second orthogonal direction A and the opposing portions 24, 25 come closest to each other. Due to this, the volume of the pressure receiving liquid chamber 33 is reduced.
As a result, the pressure in the pressure receiving liquid chamber 33 rises, and the liquid in the pressure receiving liquid chamber 33 flows out to the restriction passage 38 in the liquid sealing space 37, so that the liquid flows through the restriction passage 38 and vibration is generated. Absorbed and attenuated.

  As described above, when the main body 34 is elastically deformed in the second orthogonal direction A, the end surface 36a of the restricting portion 36 and the opposing portion 24 of the first mounting member 11 as shown in FIG. The gap V2 between the engaging portion 35 and the engaging portion 35 gradually decreases, and thereafter, when the facing portions 24 and 25 are closest to each other, the restricting portion 36 and the engaging portion 35 are engaged. At this time, when the restricting portion 36 stretches in the second orthogonal direction A between the facing portions 24 and 25 of the both attachment members 11 and 12, further movement of the attachment members 11 and 12 is restricted. .

When the second mounting member 12 moves to the opposite side along the second orthogonal direction A and the opposing portions 24 and 25 are separated from each other, the stopper elastic body 32 is deformed and deformed, and the pressure receiving liquid chamber 33 The volume increases to return before it decreases. As a result, the pressure in the pressure receiving liquid chamber 33 decreases, and the liquid in the restriction passage 38 of the liquid seal space 37 flows into the pressure receiving liquid chamber 33, so that the liquid flows through the restriction passage 38 and vibration is generated. Absorbed and attenuated.
In the present embodiment, while the sub-vibration is being input, both stopper elastic bodies 32 are elastically deformed alternately by the mounting members 11, 12, and the pressure receiving pressures disposed separately in the stopper elastic bodies 32. The volume of the liquid chamber 33 is reduced alternately.

  On the other hand, when the amplitude of the input sub-vibration is small, the opposing portions 24 and 25 of the first attachment member 11 and the second attachment member 12 approach the second orthogonal direction A on the displacement side, and the second attachment Although the gap V1 between the facing portion 25 of the member 12 and the top surface 34b of the stopper elastic body 32 is gradually reduced, the second mounting member 12 is brought into contact before the facing portion 25 and the top surface 34b come into contact with each other. Moves to the opposite side along the second orthogonal direction A. Thereby, the dynamic spring constant of the vibration isolator 10 is easily maintained.

  As described above, according to the vibration isolator 10 according to the present embodiment, vibration is input to the vibration isolator 10 in the second orthogonal direction A, and both the attachment members 11 and 12 are in the second orthogonal direction A. Since the liquid can be moved back and forth between the pressure-receiving liquid chamber 33 and the liquid sealing space 37 when moving relative to each other, the attenuation characteristic can be effectively exhibited.

  Further, since the main body portion 34 is sandwiched in the second orthogonal direction A between the opposing portions 24 and 25 and elastically deformed, the stopper elastic body 32 reduces the volume of the pressure receiving liquid chamber 33. By elastically deforming the main body 34 in the direction in which the axis extends, it becomes possible to reduce the volume of the pressure receiving liquid chamber 33, stabilize the volume change of the pressure receiving liquid chamber 33, and further improve the damping characteristics. Can be demonstrated.

  Further, when the mounting members 11 and 12 are relatively moved in the second orthogonal direction A and the opposing portions 24 and 25 are closest to each other, the main body 34 is elastically deformed in the second orthogonal direction A. Since the restricting portion 36 and the engaging portion 35 are engaged with each other, the stopper elastic body 32 restricts further movement of the mounting members 11 and 12, so that the restricting portion 36 is placed between the facing portions 24 and 25. Thus, it can be stretched in the second orthogonal direction A, and further movement of the mounting members 11 and 12 can be reliably regulated.

In addition, since the pressure receiving liquid chambers 33 are separately provided in the stopper elastic bodies 32, vibration is input to the vibration isolator 10 in the second orthogonal direction A, and the mounting members 11 and 12 are When the second mounting member 12 moves relative to the second orthogonal direction A, the volume of the pressure-receiving liquid chamber 33 is determined regardless of which side of the second orthogonal direction A the second mounting member 12 moves relative to the first mounting member 11. Absorption and attenuation of vibration due to change can be achieved.
Furthermore, since the pressure receiving liquid chambers 33 arranged separately in the stopper elastic bodies 32 are communicated with each other through the liquid sealing space 37, the configuration of the vibration isolator 10 can be simplified.

In addition, since vibrations in the direction of the axis O can also be absorbed and attenuated, vibrations in the two directions of the second orthogonal direction A and the direction of the axis O can be absorbed and attenuated.
Furthermore, in this embodiment, since the stopper elastic body 32 is disposed on the first mounting member 11, for example, the second mounting member 12, the cylindrical portion 13, the elastic body 14, and the like are only allowed to vibrate in the axis O direction. Can be used in common with a vibration isolator that absorbs and attenuates noise, and cost can be reduced.

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.
For example, in the above-described embodiment, the liquid sealing space 37 is configured only by the restriction passage 38. However, the liquid sealing space 37 is not limited to this, and the liquid sealing space 37 is not limited thereto, for example, as in the vibration isolator 40 illustrated in FIG. The space 37 may be configured to include a restriction passage 38 and a sub chamber 41 that is filled with a liquid and expands and contracts according to a fluid pressure fluctuation. In the vibration isolator 40 shown in FIG. 4, the sub chamber 41 has the diaphragm member 42 as a part of the wall surface, and expands and contracts when the diaphragm member 42 is deformed according to the fluid pressure fluctuation. Further, in the illustrated example, the restriction passage 38 communicates both the pressure receiving liquid chamber 33 and the sub chamber 41 separately. In this case, when the volume of the pressure-receiving liquid chamber 33 is reduced, it becomes possible to easily circulate the liquid in the restriction passage 38, and the attenuation characteristic can be more effectively exhibited.

  In the above-described embodiment, the liquid sealing space 37 communicates the pressure receiving liquid chambers 33 disposed separately in the stopper elastic bodies 32, but is not limited thereto. For example, like the vibration isolator 50 shown in FIG. 5, a plurality of liquid sealing spaces 37 are provided independently of each other, and the plurality of liquid sealing spaces 37 communicate with the plurality of pressure receiving liquid chambers 33 individually. May be. In the illustrated example, the liquid sealing space 37 includes a sub chamber 41 and a restriction passage 38.

  Further, in the above-described embodiment, the compression type is shown as the vibration isolator 10, but the suspension type is attached so that the main liquid chamber 16 is positioned on the lower side in the vertical direction and the auxiliary liquid chamber 17 is positioned on the upper side in the vertical direction. There may be.

  In the embodiment, the main liquid chamber 16 absorbs and attenuates the vibration in the direction of the axis O and absorbs and attenuates the vibration in the two directions by changing the hydraulic pressure. However, the present invention is not limited to this. The vibration in the direction of the axis O may not be absorbed and attenuated, but only the vibration in the second orthogonal direction A as a predetermined direction may be absorbed and attenuated. In this case, the cylindrical portion 13, the elastic body 14, the partition member 18, and the orifice passage 19 may not be provided. For example, like the vibration isolator 60 illustrated in FIG. 6, the first mounting member 11 and the second mounting member 12 are provided. The vibration generator and the vibration receiver may be directly connected to each other.

  Moreover, in the said embodiment, although both the stopper elastic bodies 32 shall be arrange | positioned in the 1st attachment member 11 which is the same attachment member of both the attachment members 11 and 12, it is not restricted to this. Instead, it may be disposed on the second mounting member 12. Moreover, both the stopper elastic bodies 32 may be arrange | positioned by the mutually different attachment member.

  Further, in the above-described embodiment, the pressure receiving liquid chambers 33 are separately disposed in the stopper elastic bodies 32. However, the invention is not limited to this, and one of the stopper elastic bodies 32 is not limited thereto. It may be arranged only in the case.

  Moreover, in the said embodiment, the stopper elastic body 32 shall be arrange | positioned so that the movement toward the both sides of the said 2nd orthogonal direction A with respect to the 1st attachment member 11 of the 2nd attachment member 12 shall be arrange | positioned. However, the present invention is not limited to this, and the second mounting member 12 is disposed so as to restrict the movement only when the second mounting member 12 moves to one side of the second orthogonal direction A with respect to the first mounting member 11. May be. In this case, the opposing portions 24 and 25 do not have to be provided in pairs on the attachment members 11 and 12, and may be provided one by one.

In the above-described embodiment, the restricting portion 36 is connected to the top wall portion 34a of the main body portion 34, and the engaging portion 35 is provided in the facing portion 24. The portion 36 may be connected to the facing portion 24, and the engaging portion 35 may be provided on the top wall portion 34 a of the main body portion 34.
Further, when the mounting members 11 and 12 are relatively moved in the second orthogonal direction A and the opposing portions 24 and 25 are closest to each other, the stopper elastic body 32 is further attached to both the mounting members 11 and 12. It is possible to adopt another configuration in place of the restricting portion 36 so as to restrict the movement.

  In the above-described embodiment, the main body 34 is elastically deformed to reduce the volume of the pressure receiving liquid chamber 33. However, the main body 34 is reduced to be restored and deformed to reduce the volume of the pressure receiving liquid chamber 33. It is good. For example, the top surface 34b of the main body portion 34 and the facing portion 25 of the second mounting member 12 are connected by, for example, adhesion, and both are input in a state where no vibration is input to the vibration isolator 10. It is possible to reduce the volume of the pressure-receiving liquid chamber 33 by restoring deformation of the main body portion 34, for example, by keeping the facing portions 24, 25 of the attachment members 11, 12 closest to each other.

  In the above embodiment, the stopper elastic body 32 includes the main body 34. However, the attachment members 11 and 12 move relative to each other in the second orthogonal direction A so that the opposing portions 24 and 25 face each other. It is also possible to adopt another configuration in place of the main body portion 34 so that the volume of the pressure receiving liquid chamber 33 is reduced by being elastically deformed or restored by the both mounting members 11 and 12 until the two are closest to each other. It is. For example, the stopper elastic body 32 is formed in a cylindrical shape whose axis extends in the second orthogonal direction A and opens on both sides of the second orthogonal direction A, and both opening end portions are provided on the both attachment members 11. , 12 are respectively connected to the opposing portions 24, 25, and are provided with a cylindrical body that defines a pressure-receiving liquid chamber 33 between the opposing portions 24, 25. The volume of the pressure receiving liquid chamber 33 may be reduced by being elastically deformed or restored while being sandwiched in the second orthogonal direction A between 25.

  Moreover, in the said embodiment, when both the attachment members 11 and 12 move relatively to the said 2nd orthogonal direction A, and the opposing parts 24 and 25 mutually approach, further movement of both the attachment members 11 and 12 is carried out. Although the stopper elastic body 32 is disposed so as to be regulated by one stopper elastic body 32, the present invention is not limited to this, and the stopper elastic body 32 is arranged so that the movement is regulated by a plurality of stopper elastic bodies 32. A plurality may be provided. In this case, a plurality of stopper elastic bodies 32 may be disposed separately on both attachment members 11 and 12, and the stopper elastic bodies 32 may be disposed on at least one of the opposed portions 24 and 25. That's fine.

  In the above-described embodiment, the restriction passage 38 causes liquid column resonance when the liquid flows. However, the restriction passage 38 is not limited to this. For example, when the liquid flows through the restriction passage 38, the restriction passage 38 becomes viscous. Vibration may be absorbed and damped by damping.

  The vibration isolator 10 according to the present invention is not limited to an engine mount of a vehicle, and can be applied to other than the engine mount. For example, the present invention can be applied to a mount of a generator mounted on a construction machine, or can be applied to a mount of a machine installed in a factory or the like.

  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, 40, 50, 60 Anti-vibration device 11 First mounting member 12 Second mounting member 13 Tubular portion 14 Elastic body 16 Main liquid chamber 22 Protruding portion (pinching portion)
24, 25 Opposing part 32 Stopper elastic body 33 Pressure receiving liquid chamber 34 Main body part 34a Top wall part 35 Engaging part 36 Restricting part 37 Liquid sealing space A Second orthogonal direction (one direction)
V2 gap

Claims (6)

A first attachment member coupled to one of the vibration generator and the vibration receiver, and a second attachment member coupled to the other,
Each of these mounting members is provided with opposing portions that face each other in one direction,
At least one of these facing parts restricts further movement of both mounting members when the both mounting members relatively move in the one direction and the facing parts come closest to each other. A vibration isolator provided with a stopper elastic body,
In the stopper elastic body, a pressure receiving liquid chamber filled with a liquid is disposed,
The pressure-receiving liquid chamber communicates with a liquid-sealed space in which a liquid is sealed provided in an attachment member provided with the stopper elastic body among the two attachment members.
The stopper elastic body is elastically deformed or restored and deformed by the both mounting members until the two mounting members relatively move in the one direction and the opposing portions come closest to each other. An anti-vibration device characterized by reducing the volume. The vibration isolator according to claim 1,
The stopper elastic body is formed in a tubular shape with an axis extending in the one direction, and an open end is connected to the facing portion where the stopper elastic body is disposed, and the facing portion A body portion defining the pressure receiving liquid chamber is provided between
The anti-vibration device according to claim 1, wherein the stopper elastic body reduces the volume of the pressure receiving liquid chamber by the body portion being sandwiched in the one direction between the opposing portions and elastically deformed. A vibration isolator according to claim 2,
The pressure receiving liquid chamber is connected to one of the top wall portion of the main body portion and the facing portion, and the one-way gap is provided between the engagement portion provided on the other side. A regulating part is provided,
The stopper elastic body is configured such that when the two attachment members move relatively in the one direction and the opposing portions come closest to each other, the main body portion is elastically deformed in the one direction, and the restriction portion and the An anti-vibration device that restricts further movement of the both attachment members by engaging with the engaging portion. The vibration isolator according to any one of claims 1 to 3,
A pair of the opposing portions of the first mounting member are disposed so as to sandwich a sandwiched portion provided in the second mounting member in the one direction, and the opposing portions of the second mounting member are A pair is provided in each part facing both sides of the one direction in the part,
A pair of the stopper elastic bodies are disposed so as to restrict movement of the second mounting member toward both sides in the one direction with respect to the first mounting member,
The anti-vibration device is characterized in that the pressure receiving liquid chambers are disposed separately in both the stopper elastic bodies. A vibration isolator according to claim 4,
The stopper elastic bodies are disposed on the same mounting member among the mounting members, and the pressure receiving liquid chambers separately disposed in the stopper elastic bodies are mutually connected through the liquid sealing space. An anti-vibration device characterized by being connected. The vibration isolator according to any one of claims 1 to 5,
An axial line extends in another direction orthogonal to the one direction, and includes a cylindrical portion that is arranged in the other direction so as to be shifted from the facing portions of the two attachment members.
The cylindrical portion is directly connected to the first mounting member and connected to the second mounting member via an elastic body,
In the cylindrical portion, the elastic body is a part of the wall surface, and a main liquid chamber in which a liquid is sealed is formed,
A vibration isolator which absorbs and damps vibrations when the main liquid chamber fluctuates in hydraulic pressure.

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