JP2006057833A - Anti-vibration structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent destruction of a composite laminate even when a vibration having a large amplitude is input along a shear direction and a twist deformation occurs in the composite laminate.
SOLUTION: In the vibration-proof structure 10, a laminated rubber 16 is held by a flange 18 and 20 in a compressed state along a lamination direction at a predetermined compression rate, and the laminated rubber in which the flanges 18 and 20 are in a compressed state. The elastic restoring force received from 16 was supported by the link chain 28. As a result, even when a vibration having a large amplitude is input along the shearing direction, the laminated rubber 16 is twisted and a tensile load is applied to the laminated rubber 16, the link chain 28 is laminated between the flanges 18 and 20. Since the tension is constantly applied by the restoring force received from the rubber 16, a tensile load acts on the laminated rubber 16, and at the same time, a part of the tensile load is supported by the link chain 28, It is possible to reduce the tensile stress along the stacking direction.
[Selection] Figure 2

Description

  The present invention has a composite laminated material in which a plurality of hard plates and soft plates having viscoelastic properties are alternately laminated. For example, a vibration generating unit such as an engine or a motor is placed on a vibration receiving unit such as a floor or a vehicle body. Further, the present invention relates to an anti-vibration structure used for damping and absorbing vibration transmitted from the vibration generating unit to the vibration receiving unit.

  Conventionally, in order to support vibration generated from a vibration generating unit such as an engine on a vibration receiving unit such as a floor or a vehicle body and to attenuate and absorb vibration transmitted from the vibration generating unit to the vibration receiving unit, The vibration generating part is supported on the vibration receiving part with a vibration proof structure using a composite laminated material in which a hard plate with rigidity such as a steel plate and a soft plate such as rubber with viscoelastic properties are alternately laminated. To be done. In this anti-vibration structure, the composite laminate is interposed between the vibration generator and the vibration receiver, so that the vibration generated from the vibration generator is attenuated and absorbed by the composite laminate and the vibration is expanded by the resonance phenomenon. By preventing this, the vibration level transmitted to the vibration receiving portion is reduced. Such a composite laminate is made so that it can be relatively deformed in the horizontal direction while supporting the weight of the vibration generating portion. Therefore, when the vibration is applied in a state where the load of the vibration generating portion is supported, that is, in a state where a positive pressure is applied to the composite laminate, the composite laminate mainly undergoes shear deformation along the horizontal direction. Since the lower end side is constrained by the vibration receiving portion side, the composite laminate material is subject to twisting deformation at the time of vibration input with a large amplitude, and one end portion along the amplitude direction is generated in the composite laminate material due to the occurrence of the twisting deformation. A compressive load acts on the other end, and a tensile load acts on the other end. The compressive load and tensile load acting on the composite laminate will increase as the twist deformation of the composite laminate increases, that is, the amplitude of the input vibration increases. At this time, since the composite laminate has a relatively large constraining surface and a small free surface area, a concentration of static pressure stress occurs at the center of the constraining surface when a tensile load is input. There is a problem that damage (breaking) occurs at an early stage.

  Patent Document 1 has a composite laminate in which hard plates having a plurality of possible rigidity and soft plates having viscoelastic properties are alternately bonded, and flanges are provided at both ends of the composite laminate, respectively. In the seismic isolation structure provided, these flanges are connected to each other by a linear displacement restrictor made of a high-tensile material such as Teflon (registered trademark) or aramid fiber, and the composite laminate is laminated by the displacement restricting member. A seismic isolation structure that restricts deformation in a direction orthogonal to the direction (horizontal direction) is disclosed.

  The seismic isolation structure of Patent Document 1 is basically the same structure as an anti-vibration structure that supports a vibration generating part such as an engine or a motor on the vibration receiving part. It is possible. In this seismic isolation structure, when the vibration is not input, the displacement limiting body is stretched between the flanges in a loose state, but when the vibration is input and the composite laminate is deformed more than the predetermined In addition, since the looseness of the displacement limiting member is removed, a part of the input vibration is supported by the displacement limiting member to limit the deformation of the composite laminate. Patent Document 1 also describes that a chain is used as the displacement limiting member as described above in a conventional seismic isolation structure.

3A and 3B show an example of a conventional vibration-proof structure using a chain as a displacement limiting member. This anti-vibration structure 50 includes a composite laminated material 64 in which a plurality of rigid hard plates 52 and a soft plate 54 having viscoelastic properties are alternately bonded, and the composite laminated material 64 from the outside in the laminating direction. A pair of flanges 56, 58 provided so as to be sandwiched are provided, and these flanges 56, 58 are connected by a loose link chain 60. Here, the link chain 60 is formed by connecting a plurality of link pieces 62 each formed in an annular shape, and a gap G is provided between at least a pair of link pieces 62 in order to make the link chain 60 loose. Is formed. In this way, by linking the link chain 60 having high rigidity and strength in the pulling direction between the flanges 56 and 58, the displacement in the horizontal direction of the vibration generating portion supported by the vibration isolation structure 50 is limited, and the composite lamination is performed. Breakage due to the tensile load of the material 64 can be effectively prevented. Even when the composite laminate 64 is broken, the flanges 56 and 58 are connected by the link chain 60 to prevent the composite laminate 64 from being disassembled into a plurality of parts and vibrate via the vibration isolation structure 50. The generating part can be reliably maintained in a state supported by the vibration receiving part.
JP 2004-36648 A

  However, in the vibration-proof structure 50 as described above, the gap G of the link chain 60 disappears even if the deformation of the composite laminate 64 in the horizontal direction (shear direction) is restricted by the link chain 60 when vibration is input. When the vibration of the vibration generating portion that is in a tension state is repeated, a crack occurs in the stress concentration surface F (see FIG. 4) near the center in the stacking direction of the soft plate 54 in the composite laminate 64, and the composite laminate 64 May be destroyed in a relatively short time.

  In order to clarify the cause of the breakdown of the composite laminate 64 as described above, the inventors of the present application obtain the stress distribution state of the composite laminate 64 at the time of vibration input by FEM (finite element method) analysis and cause the failure. Was considered. As a result, in the conventional anti-vibration structure 50, when the gap G of the link chain 60 disappears and the tension state disappears, the center line C ′ of the link chain 60 is set to the center line C before deformation as shown in FIG. As a result, the link chain 60 changes from a slack state before deformation to a tension state. As a result, a large stress concentration occurs near the center in the stacking direction of the composite laminate 64. For this reason, when the vibration generating part repeatedly vibrates with a large amplitude, the stress concentration surface F (the cross section taken along the two-dot chain line shown in FIG. 4) near the center of the soft laminate 54 in the composite laminate 64 is easily cracked. It was clarified that the composite laminate 64 was broken starting from this crack.

  In view of the above facts, the object of the present invention is to effectively prevent the composite laminate from being destroyed even when a vibration having a large amplitude is input along the shear direction and the composite laminate is deformed by twisting. The object is to provide an anti-vibration structure.

  In order to achieve the above object, the vibration-proof structure according to claim 1 of the present invention includes a composite laminate in which a plurality of rigid hard plates and soft plates having viscoelastic properties are alternately laminated, The composite laminated material is provided so as to be sandwiched from the outside in the laminating direction, and is connected to a vibration generating unit and a vibration receiving unit, respectively, and a tensile load along the laminating direction. On the other hand, it has higher rigidity than the composite laminated material, and can be deformed in a shearing direction orthogonal to the laminating direction, and both end portions along the laminating direction are the first flange member and the second flange. A vibration limiting structure that is connected and fixed to each member and limits displacement of the stacked body in the stacking direction and the shearing direction, wherein the first flange member and the second Flange member The composite laminated material is held in a state compressed at a predetermined compression rate along the laminating direction and is received from the composite laminated material in which the first flange member and the second flange member are in a compressed state. An elastic restoring force is supported by the displacement limiting member.

  In the vibration-proof structure according to claim 1 of the present invention, the first and second flange members hold the composite laminated material in a state compressed at a predetermined compression rate along the laminating direction. By supporting the elastic restoring force received from the composite laminated material in which the flange member 1 and the second flange member are compressed by the displacement limiting member, vibration with a large amplitude is input along the shear direction. Even when a deformation occurs in the material and a tensile load is applied to the composite laminate, the displacement limiting member is always stretched by the restoring force received from the composite laminate between the first flange and the second flange. Because it is in a state (tensile state), a tensile load acts on the composite laminate due to input vibration, and at the same time, a part of this tensile load is supported by a displacement limiting member, resulting in a laminate that occurs in the composite laminate Tensile stress along the direction can be reduced.

  In addition, since the displacement limiting member has higher rigidity than the displacement limiting member with respect to the load in the tensile direction, even when a tensile load is applied to the composite laminate along with an external force along the shear direction, The deformation amount along the shear direction can be prevented from becoming excessive, and the deformation of the composite laminate in the tensile direction can be reduced.

  As a result, according to the vibration-proof structure according to claim 1 of the present invention, even when a vibration having a large amplitude is input along the shear direction and the composite laminate material is deformed by twisting, the composite laminate material can be obtained. The tensile stress generated in the composite laminate can be reduced, and the stress concentration accompanying the increase in the amount of deformation along the shear direction of the composite laminate can be relaxed, so that the composite laminate can be effectively prevented from being broken.

  Further, the vibration isolating structure according to claim 2 of the present invention is the vibration isolating structure according to claim 1, wherein the displacement limiting member is a link chain in which a plurality of link pieces are linearly connected. Features.

  The vibration isolating structure according to claim 3 of the present invention is the vibration isolating structure according to claim 1 or 2, wherein the composite laminate is provided with a hollow portion penetrating along the laminating direction, and the hollow portion is provided in the hollow portion. The displacement limiting member is provided.

  The vibration-proof structure according to claim 4 of the present invention is the vibration-proof structure according to claim 1, 2, or 3, wherein the soft plate in the composite laminate is formed of rubber.

  The vibration isolating structure according to claim 5 of the present invention is the vibration isolating structure according to any one of claims 1 to 4, wherein the composite laminated material is laminated from the vibration generating portion and the vibration receiving portion. When the compressive load along the direction is not input, it is held in a compressed state exceeding 0% along the stacking direction and 5% or less, preferably exceeding 0% along the stacking direction, And held in a compressed state at a compression rate of 2% or less, more preferably in a state of being compressed at a compression rate approximating 0% with an error range of more than 0% and + 0.5% or less along the laminating direction. It is characterized by holding.

  The vibration isolating structure according to claim 6 of the present invention is the vibration isolating structure according to any one of claims 1 to 4, wherein the composite laminated material is moved from the vibration generating portion and the vibration receiving portion to the stacking direction. When a compressive load is input, it is held in a compressed state exceeding 0% along the laminating direction and at a compression rate of 20% or less, preferably exceeding 0% along the laminating direction. And is held in a compressed state at a compression rate of 10% or less, more preferably in a compressed state at a compression rate of more than 0% and 5% or less along the laminating direction.

  A vibration isolating structure according to claim 7 of the present invention is the vibration isolating structure according to any one of claims 1 to 6, wherein at least one of the first flange member and the second flange member is provided. A rotation stop portion for preventing the displacement limiting member from rotating in the twisting direction is provided.

  As described above, according to the vibration-proof structure of the present invention, even when vibration having a large amplitude is input along the shear direction and the composite laminate material is deformed by twisting, the composite laminate material is effectively destroyed. Can be prevented.

  Hereinafter, an anti-vibration structure according to an embodiment of the present invention will be described with reference to the drawings.

[First Embodiment]
(Configuration of anti-vibration structure)
1A and 1B show a vibration-proof structure according to a first embodiment of the present invention. The vibration isolating structure 10 includes a laminated rubber 16 that is a composite laminated material in which hard plates 12 that can be regarded as substantially rigid bodies and rubber plates 14 having viscoelastic properties are alternately laminated. The laminated rubber 16 is formed in a substantially thick cylindrical shape, and a columnar cavity 17 penetrating in the laminating direction (arrow L direction) of the laminated rubber 16 is bored at the center of the laminated rubber 16. The laminated rubber 16 is configured, for example, by bonding the hard plate 12 and the rubber plate 14 together by vulcanization adhesion.

  Here, as a material of the hard board 12 constituting the laminated rubber 16, for example, metal, ceramics, plastics, FRP, polyurethane, wood, paper board, slate board, decorative board, and the like can be used. The rubber plate 14 is generally molded using various vulcanized rubbers as a raw material. As rubber, ethylene propylene rubber (EPR, EPDM), nitrile rubber (NBR), butyl rubber, halogenated butyl rubber, chloroprene rubber (CR), natural rubber (NR), isoprene rubber (IR), styrene butadiene rubber (SBR), Examples include butadiene rubber (BR).

  The anti-vibration structure 10 is provided with a flange 18 and a flange 20 on the outer side of the laminated rubber 16 in the laminating direction, and the pair of flanges 18 and 20 are respectively added to the lower end surface and the upper end surface of the laminated rubber 16. It is fixed by sulfur or the like and sandwiches the laminated rubber 16 along the laminating direction. Here, the flanges 18 and 20 are each formed of a rectangular metal plate. The flange 18 on the lower end side is formed with a circular opening 22 facing the cavity 17 of the laminated rubber 16 at the center thereof, and the bottom surface of the flange 18 is concave along the peripheral edge of the opening 22. The insertion part 24 is formed. The upper end side flange 20 is formed with an insertion hole 26 having a smaller diameter than the hollow portion 17 of the laminated rubber 16 in the center thereof.

  In the vibration isolating structure 10, a metal link chain 28, which is a displacement limiting member, is disposed in the hollow portion 17 of the laminated rubber 16. The link chain 28 is arranged such that its longitudinal direction coincides with the lamination direction of the laminated rubber 16, and has sufficiently higher rigidity and strength than the laminated rubber 16 with respect to a tensile load along the lamination direction. ing. The link chain 28 is configured by connecting a plurality of (three in the present embodiment) link pieces 30, 31, 32 in a linear shape. The link chain 28 can be easily deformed in a shearing direction (arrow S direction) orthogonal to the stacking direction as a whole by bending between the link pieces 30, 31, 32.

  As shown in FIG. 1B, a circular plate-like lid member 34 is fixed to the lower end portion of the link piece 30 positioned at the lowermost portion of the link chain 28 by welding or the like. The bolt 32 is fixed to the upper end of the link piece 32 positioned at the top of the link chain 28 by welding or the like so as to protrude upward.

  When the vibration isolator 10 is assembled, the link chain 28 is inserted into the cavity 17 of the laminated rubber 16 through the opening 22 of the flange 18 on the lower end side. At this time, the bolt shaft 36 is inserted through the insertion hole 26 of the flange 20 to project the distal end side to the outside of the flange 20, and the lid member 34 closes the opening 22 of the flange 18, and its outer peripheral edge is flanged. 18 is inserted into the insertion portion 24. A washer 38 is fitted to the tip of the bolt shaft 36 protruding from the flange 20, and a nut 40 is further screwed. As a result, the link chain 28 disposed in the hollow portion 17 has its lower end connected and fixed to the flange 18 via the lid member 34 and its upper end connected and fixed to the flange 20 via the bolt shaft 36. Is done.

  Next, the laminated rubber 16 is pressed in the lamination direction by a press device or the like and is compressed at a predetermined compression rate. In this state, the nut 40 screwed into the bolt shaft 36 protruding from the flange 20 is tightened until there is no play between the nut 20 and a predetermined fastening torque is generated. Thereby, the laminated rubber 16 is held in a compressed state compressed at a predetermined compression rate along the laminating direction by the flanges 18 and 20, and the elastic restoration that the flanges 18 and 20 receive from the laminated rubber 16 in the compressed state. The force is supported by the link chain 28, and the link chain 28 is in a tensioned state (tensile state) by this restoring force.

  Here, when the laminated rubber 16 does not support the vibration generating part and receives a compressive load along the lamination direction from the vibration generating part, it exceeds 0% and 5% or less along the lamination direction. It is held in a compressed state at a compression ratio of preferably less than 0% along the laminating direction and is compressed at a compression rate of 2% or less, more preferably 0% along the laminating direction. And at a compression rate approximating 0% with an error range of + 0.5%.

  However, in a state where the vibration generating part is supported, the laminated rubber 16 receives a load (compressive load) from the vibration generating part and is compressed in the laminating direction, so that a compressive load along the laminating direction is input from the vibration generating part. Is held in a compressed state exceeding 0% along the laminating direction and at a compression rate of 20% or less, preferably exceeding 0% along the laminating direction and at a compression rate of 10% or less. It is held in a compressed state, and more preferably, it is held in a compressed state at a compression rate of more than 0% and 5% or less along the laminating direction.

(Operation of anti-vibration structure)
Next, the operation of the vibration isolating structure according to this embodiment will be described.
The vibration isolating structure 10 according to the present embodiment is disposed, for example, so as to be interposed between a vibration generating unit such as an engine or a motor and a vibration receiving unit such as a floor or a vehicle body. Support on top. Thus, when vibration is generated from the vibration generating portion, the vibration is attenuated and absorbed by the internal friction of the laminated rubber 16 and the vibration generating portion is elastically supported in the horizontal direction by the laminated rubber 16 of the vibration isolating structure 10. Therefore, the natural frequency of the vibration generating unit can be increased and the resonance phenomenon with the generated vibration can be prevented. As a result, the vibration level transmitted from the vibration generating unit to the vibration receiving unit can be reduced.

  In the vibration-proof structure 10 according to the present embodiment described above, the laminated rubber 16 is held in a compressed state at a predetermined compression rate along the lamination direction by the flanges 18 and 20, and the flanges 18 and 20 are in a compressed state. Since the elastic restoring force received from the laminated rubber 16 is supported by the link chain 28, vibration having a large amplitude is input along the shear direction, and the laminated rubber 16 is twisted and deformed as shown in FIG. Even when a tensile load is applied to one end side (the right end side in FIG. 2) along the amplitude direction of the laminated rubber 16, the link chain 28 is always subjected to the restoring force received from the laminated rubber 16 between the flanges 18 and 20. Since it is in a tensioned state (tensile state), a tensile load acts on the laminated rubber 16 due to vibration, and at the same time a part of this tensile load is linked to the link chain. Supported by 8, it can be reduced tensile stress in the stacking direction caused in the laminated rubber body 16.

  Further, since the link chain 28 has higher rigidity and strength than the laminated rubber 16 with respect to the load in the tensile direction, the laminated rubber 16 is also subjected to a tensile load along with an external force along the shear direction. It is possible to prevent the amount of deformation along the shearing direction of 16 from becoming excessive, and to reduce the deformation of the laminated rubber 16 in the tensile direction.

  As a result, according to the vibration isolating structure 10 according to the present embodiment, even when vibration having a large amplitude is input along the shear direction and the laminated rubber 16 is twisted and deformed, the laminated rubber 16 is generated. The tensile stress can be reduced, and the stress concentration accompanying the increase in the amount of deformation along the shearing direction of the laminated rubber 16 can be alleviated, so that the laminated rubber 16 can be effectively prevented from being broken.

  Further, in the vibration isolating structure 10 according to the present embodiment, the laminated rubber 16 is provided with the cavity portion 17 penetrating along the lamination direction, and the link chain 28 is disposed in the cavity portion 17, whereby the link chain 28 is Since it can be stretched along the symmetry axis (axial center) of the laminated rubber 16, when a tensile load is applied to the laminated rubber 16 together with an external force along the shearing direction, the link chain 28 is connected to other than the axial center of the laminated rubber 16. Compared with the case where it arrange | positions in this position, the distribution of the tensile stress which arises in the laminated rubber 16 can be equalized effectively.

  In the vibration isolating structure 10 according to the present embodiment, the link chain 28 in which a plurality of link pieces 30, 31, 32 are linearly connected is used as the displacement limiting member. As long as it has higher rigidity than the laminated rubber 16 with respect to a tensile load along the lamination direction and can be deformed in the shearing direction, for example, a metal wire, a metal wire knitted by a metal wire, A linear member such as a string member made of a resin material such as an aramid fiber may be used.

[Second Embodiment]
(Configuration of anti-vibration structure)
FIG. 5 shows a vibration-proof structure according to the second embodiment of the present invention. In addition, in the anti-vibration structure 100 according to the present embodiment, the same parts as those of the anti-vibration structure 10 according to the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The anti-vibration structure 100 according to the present embodiment is different from the anti-vibration structure 10 according to the first embodiment in that a pair of rotation-preventing members 102 are welded to the central portion of the inner surface of the flange 20 facing the cavity 17. The flange 104 provided at the base end of the link piece 32 is inserted between the pair of rotation-preventing members 102. As shown in FIG. 6, the pair of locking members 102 are each formed in a substantially rectangular column shape that is elongated along the radial direction around the axis A of the vibration-proof structure 100, and the outer periphery of the insertion hole 26. And are arranged so as to have a symmetrical positional relationship (point symmetry) about the axis S.

  On the other hand, a flange portion 104 formed in a substantially rectangular plate shape is provided at the base end portion of the link piece 32, and the bolt shaft 36 is axially provided at the center portion of the outer surface of the flange portion 104. It is fixed by welding or the like so as to protrude, and both ends of the U-shaped steel wire portion 106 are fixed by welding or the like on both ends along the longitudinal direction of the inner surface. As shown in FIG. 5, the flange portion 104 presses the outer surface of the vibration isolation structure 100 to the center portion of the flange 20 in the assembled state, and the tip end side of the bolt shaft 36 is inserted into the insertion hole 26. And projecting to the outside of the flange 20. As described above, the nut 40 is screwed into the front end side of the bolt shaft 36 after the washer 38 is fitted. Thereby, the flange portion 104 of the link piece 32 is connected and fixed to the flange 20, and the laminated rubber 18 is held in a compressed state by the link chain 28 including the link piece 32.

  Further, in the vibration isolating structure 10, when the flange portion 104 of the link piece 32 is press-contacted to the flange 20, the position of the flange portion 104 is adjusted in the rotational direction (the twisting direction of the link chain 28), and the pair of rotation-preventing members 102. It is inserted between. At this time, the position of the lid member 34 is also adjusted in the rotational direction together with the flange 104 so that the link chain 28 is not twisted. As a result, the flange portion 104 of the link piece 32 is reliably positioned at a predetermined initial position along the twist direction of the link chain 28 by the pair of stop members 102 and is prevented from being displaced along the twist direction. Is done.

  Next, a method for assembling the vibration isolating structure 100 according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 7A, when the vibration isolating structure 100 is assembled, the laminated rubber 16 is first placed on the assembly table 108 with the flange 20 facing downward. The assembly table 108 has an opening 110 formed in the center thereof, and the laminated rubber 16 is placed on the assembly table 108 so that the center of the insertion hole 26 of the flange 20 substantially coincides with the center of the opening 110. The position is adjusted. In this state, the link chain 28 is inserted into the hollow portion 17 of the laminated rubber 16, and as shown in FIG. 7B, the lid member 34 is inserted into the insertion portion 24, and the bolt shaft 36 is The tip end side of the bolt shaft 36 protrudes outward from the flange 20 by being inserted into the insertion hole 26. At this time, the flange portion 104 of the link piece 32 contacts the flange 20 and is inserted between the pair of rotation-preventing members 102.

  Then, as shown in FIG. 7C, after the washer 38 is fitted on the front end side of the bolt shaft 36 protruding from the flange 20, the nut 40 is screwed to complete the vibration-proof structure 100. At this time, the nut 40 may be screwed onto the bolt shaft 36 while the laminated rubber 16 is compressed at a predetermined compression rate, and the nut 40 is twisted onto the bolt shaft 36 against the repulsive force of the laminated rubber 16. The laminated rubber 16 may be compressed until a predetermined compression rate is obtained. Even when the nut 40 is screwed onto the bolt shaft 36 in this manner, the vibration isolating structure 100 is fixed to a predetermined initial position along the twisting direction of the flange portion 104 of the link piece 32 by the pair of rotation stop members 102. Therefore, the torque from the nut 40 is transmitted to the link chain 32 and the link chain 32 is reliably prevented from being twisted.

The structure of the vibration proof structure which concerns on the 1st Embodiment of this invention is shown, (A) is a top view of a vibration proof structure, (B) is side sectional drawing of a vibration proof structure. FIG. 2 is a side cross-sectional view showing a state in which a vibration having a large amplitude is input along the shear direction to the vibration-proof structure shown in FIG. The structure of the conventional vibration proof structure is shown, (A) is a top view of a vibration proof structure, (B) is side sectional drawing of a vibration proof structure. FIG. 4 is a side cross-sectional view showing a state in which a vibration having a large amplitude is input along the shear direction to the vibration-proof structure shown in FIG. It is side surface sectional drawing which shows the structure of the vibration isolator structure which concerns on the 2nd Embodiment of this invention. It is the side view and top view which show the structure of the collar part provided in the rotation stop member provided in the flange in the vibration-proof structure shown in FIG. 5, and a link piece. It is side surface sectional drawing for demonstrating the assembly method of the vibration proof structure shown by FIG.

Explanation of symbols

10 Anti-vibration structure 12 Hard plate 14 Rubber plate 16 Laminated rubber (composite laminated material)
17 Cavity 18, 20 Flange 28 Link chain (displacement limiting member)
30, 31, 32 Link piece 100 Anti-vibration structure 102 Anti-rotation member (anti-rotation part)
104 buttock

Claims (7)

A composite laminate in which hard plates having a plurality of rigidity and soft plates having viscoelastic properties are alternately laminated;
First and second flange members that are provided so as to sandwich the composite laminated material from the outside in the laminating direction and are connected to a vibration generating unit and a vibration receiving unit, respectively.
It has higher rigidity than the composite laminate material with respect to a tensile load along the laminating direction, and can be deformed in a shearing direction orthogonal to the laminating direction, and both end portions along the laminating direction are the first A displacement limiting member that is connected and fixed to the flange member and the second flange member, respectively, and restricts displacement of the composite laminate in the laminating direction and the shearing direction;
An anti-vibration structure having
The first and second flange members and the second flange member hold the composite laminated material in a state compressed at a predetermined compression rate along the lamination direction, and the first flange member and the second flange member. An anti-vibration structure characterized in that an elastic restoring force received from the composite laminated material in which a flange member is compressed is supported by the displacement limiting member.   The vibration isolation structure according to claim 1, wherein the displacement limiting member is a link chain in which a plurality of link pieces are linearly connected.   3. The vibration-proof structure according to claim 1, wherein a hollow portion penetrating along the laminating direction is provided in the composite laminated material, and the displacement limiting member is disposed in the hollow portion.   4. The vibration-proof structure according to claim 1, wherein the soft plate in the composite laminate is formed of rubber.   The composite laminated material is compressed at a compression rate exceeding 0% and not more than 5% along the laminating direction when no compression load is input along the laminating direction from the vibration generating unit and the vibration receiving unit. And preferably held in a compressed state exceeding 0% along the laminating direction and at a compression rate of 2% or less, more preferably exceeding 0% along the laminating direction, and +0.5 5. The vibration-proof structure according to claim 1, wherein the vibration-proof structure is held in a compressed state at a compression rate approximating 0% within an error range of less than or equal to%.   The composite laminated material was compressed at a compression rate exceeding 0% and not more than 20% along the laminating direction when a compressive load along the laminating direction was input from the vibration generating portion and the vibration receiving portion. Held in a state, preferably held in a compressed state at a compression rate of more than 0% and 10% or less along the laminating direction, more preferably more than 0% and 5% along the laminating direction. The vibration-proof structure according to any one of claims 1 to 4, wherein the vibration-proof structure is held in a compressed state at the following compression ratio.   The rotation stop part which prevents rotation to the twist direction of the said displacement limitation member was provided in at least one of the said 1st flange member and the said 2nd flange member, The any one of Claim 3 thru | or 6 characterized by the above-mentioned. 1. A vibration-proof structure according to item 1.

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