JP2014206197A - Vibration control support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control support device having higher proof stress against twist deformation and keeping high load bearing function.SOLUTION: A vibration control support device 1 includes a lamination rubber 4 having hard plates 2 and rubber plates 3 alternately laminated, and a pair of flange plates 7, 8 arranged on both sides of the lamination rubber 4 in a lamination direction. An outer periphery of at least one of the rubber plates 3 is provided with a surrounding member 14 surrounding the outer periphery of the rubber plate 3. The surrounding member 14 is configured to have the tensile rigidity higher than that of the rubber plate 3 and is adhered with vulcanization on an outer peripheral face of the rubber plate 3 of the surrounding member 14.

Description

  The present invention relates to an anti-vibration support device having a laminate formed by alternately laminating hard plates and elastic bodies, and a pair of flange plates disposed at both ends of the laminate in the stacking direction.

  Conventionally, this type of anti-vibration support device can support high loads, so it is used for various applications such as suspensions for construction machines and construction vehicles, mounts for loading platforms, and seismic isolation structures for building structures. ing.

Such a laminated type anti-vibration support device shows high durability against a compressive load in the stacking direction and can support a high load, but against a tensile load in the stacking direction. Is known to have lower durability than the compression direction. Therefore, what developed the thing which reduced the tensile load added to a laminated body by mutually connecting a pair of flange board with connection members, such as a link chain.
However, even in the structure including the connecting member, when a large amplitude vibration is input in a direction orthogonal to the stacking direction with respect to the stacked body in a state where the load is supported, the pair of flange plates described above are moved in the amplitude direction. Relative displacement may cause so-called twisting deformation in which the distance between the pair of flange plates decreases at one end side in the amplitude direction due to the support load, and the distance between the pair of flange plates increases at the other end side in the amplitude direction. . When twisting deformation occurs, a compressive load acts on one end side in the amplitude direction, and a tensile load acts on the other end side. In such a laminated type anti-vibration support device, the restraint surface between the elastic body and the flange plate is relatively large, but the free surface area is small. Internal stress is concentrated and damaged.
Therefore, for example, in the vibration isolating support device shown in Patent Document 1, the thickness of the rubber layer on which the tensile load due to the twisting deformation is concentrated is made thicker than the thickness of the other rubber layers, whereby the tensile load is generated in each rubber layer. The stress is made uniform to prevent local cracks from occurring in the rubber layer.

JP 2007-333052 A

  However, in the above conventional vibration-proof support device, the rubber layer is thickened to increase the durability against twisting deformation, so the rubber layer is thickened in the laminating direction of the laminated rubber. There is a problem that the rigidity against the directed compressive load is lowered and the load support function of the vibration isolating support device is lowered.

  An object of the present invention is to solve such problems of the prior art, and the object of the present invention is to maintain a high load support function while enhancing durability against twisting deformation. It is to provide a prevention support device.

In the vibration isolating support device of the present invention, a surrounding member surrounding the outer periphery of the elastic body is provided on the outer periphery of at least one layer of the elastic body constituting the laminated body, and the surrounding member is higher in tension than the elastic body. It has rigidity and is fixed to the outer peripheral portion of the elastic body.
In the anti-vibration support device of the present invention, the surrounding member increases the rigidity of the laminated body against the compressive load directed in the laminating direction, and reduces the stress generated in the elastic body on the side on which the tensile load is applied due to the twisting deformation. The load supporting function of the anti-vibration support device can be maintained high while improving the durability against twisting deformation.

In the vibration isolating support device of the present invention, it is preferable that the surrounding member is formed in a ring body, and an inner peripheral surface thereof is fixed to an outer peripheral surface of the elastic body over the entire periphery.
According to this configuration, the elastic deformation to the outer side in the radial direction perpendicular to the laminating direction in which the elastic body is generated when receiving a compressive load in the laminating direction can be reliably regulated by the surrounding member, and the laminated body Regardless of which direction it is subjected to the twisting deformation, it is possible to more reliably reduce the internal stress generated in the elastic body by pushing the portion where the internal stress rises during the twisting deformation by the surrounding member.

In the anti-vibration support device of the present invention, the surrounding member is configured by connecting a plurality of surrounding pieces in the circumferential direction, and each surrounding piece is fixed to the outer peripheral surface of the elastic body on the inner peripheral surface. preferable.
According to this configuration, it is possible to easily assemble the surrounding member to the elastic body, for example, it is possible to assemble the surrounding member on the outer periphery of the elastic body after forming the laminated body by laminating the hard plate and the elastic body. Can do.

In the anti-vibration support device of the present invention, it is preferable that the surrounding member is spaced apart from the hard plate in the stacking direction.
According to this configuration, when the laminated body is deformed, the surrounding member and the hard plate are prevented from coming into contact with each other, so that these members collide with each other or are rubbed due to displacement while being in contact with each other. It is possible to prevent the surrounding member or the hard plate from being damaged, and it is possible to prevent these members from coming into contact with each other and generating abnormal noise.

In the anti-vibration support device of the present invention, it is preferable that the elastic body is pre-compressed radially inward by the surrounding member.
According to this configuration, by setting a compression force to the elastic body in advance, it is possible to increase the durability of the elastic body against a tensile load and further increase the proof strength of the vibration isolating support device against twisting deformation.

  ADVANTAGE OF THE INVENTION According to this invention, the prevention support apparatus which can maintain a high load support function can be provided, improving the durability with respect to a twist deformation.

It is sectional drawing of the anti-vibration support apparatus which is one embodiment of this invention. It is a top view of the vibration isolating support apparatus shown in FIG. It is sectional drawing of the modification of the vibration isolating support apparatus shown in FIG. It is a characteristic diagram which shows the change of the internal stress of the rubber plate with respect to the tensile load toward the lamination direction in the Example of this invention, and a comparative example. (A) is a figure which shows the internal stress distribution of the rubber plate of the comparative example which received the tensile load toward the lamination direction, (b) is the inside of the rubber plate of the Example which received the tensile load toward the lamination direction It is a figure which shows stress distribution. It is a characteristic diagram which shows the change of the internal stress of the rubber plate on the side to which a tensile load acts when it receives a twist deformation in an example of the present invention and a comparative example. (A) is a figure which shows the internal stress distribution of the rubber plate of the comparative example which received the tensile load by a twist deformation | transformation, (b) shows the internal stress distribution of the rubber plate of the Example which received the tensile load by a twist deformation. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  An anti-vibration support device 1 according to an embodiment of the present invention shown in FIGS. 1 and 2 is used for a suspension of a construction vehicle. The anti-vibration support device 1 is provided between the suspension and the vehicle body, and can support the load of the vehicle body and suppress vibration transmission from the tire side to the vehicle body side.

This anti-vibration support device 1 includes a laminated rubber as a laminated body in which a plurality of hard plates 2 and a plurality (9 layers in this embodiment) of elastic bodies, that is, rubber plates 3 are alternately laminated. 4.
The hard plate 2 is formed in a disc shape having a predetermined thickness, and a through hole is provided in the axial center thereof. The rubber plate 3 is formed in a disc shape having a predetermined thickness, and a through hole is provided in the axis. Thus, the hard plate 2 and the rubber plate 3 are each formed in a ring shape, and are bonded to each other by vulcanization adhesion. Thus, the laminated rubber 4 is formed in a substantially thick cylindrical shape having a circular cavity portion 5 in a plan view extending in the lamination direction (vertical direction in FIG. 1) at the center portion. The hard plate 2 has an outer diameter dimension larger than that of the rubber plate 3 and protrudes radially outward with respect to the outer peripheral surface of the rubber plate 3. The peripheral surface of the cavity 5 is covered with a cylindrical rubber body 6 formed integrally with the rubber plate 3.

  The hard plate 2 constituting the laminated rubber 4 can be constituted by, for example, a metal plate such as a steel plate or an aluminum plate, or a resin plate such as a nylon plate. On the other hand, the rubber plate 3 can be formed by molding using various vulcanized rubbers, but an elastic body formed of an elastic material such as an elastomer other than the rubber material can also be used.

  At both ends of the laminated rubber 4 in the laminating direction, a pair of flange plates 7 and 8 formed by a metal plate such as a steel plate or a hard resin plate are disposed. As shown in FIG. 2, these flange plates 7 and 8 are formed in a rectangular plate shape, and are fixed to the rubber plate 3 at the lower end and the upper end of the laminated rubber 4 by vulcanization, respectively. It is pinched. Fixing holes (only the fixing holes 8a of the flange plate 8 are shown in FIG. 2) are provided at the four corners of the flange plates 7 and 8, respectively, and the flange plates are formed by bolts and nuts (not shown) inserted through these fixing holes 8a. 7 and 8 can be fixed to a desired member. In the present embodiment, the flange plate 7 on the lower end side of the laminated rubber 4 is fixed to the suspension side of the construction vehicle, and the flange plate 8 on the upper end side is fixed to the vehicle body side of the construction vehicle.

A metal link chain 9 is disposed in the cavity 5 of the laminated rubber 4. The link chain 9 has a configuration in which three link pieces 10, 11, 12 are connected in a linear shape. The lower link piece 10 has a disk-like support portion 10a, and is supported by the lower flange plate 7 at the support portion 10a. The upper link piece 11 has a bolt portion 11 a that penetrates the upper flange plate 8, and the bolt portion 11 a is fixed to the upper flange plate 8 by a nut 13. The lower link piece 10 and the upper link piece 11 are connected to each other by an intermediate link piece 12. The link chain 9 has sufficiently higher rigidity and strength than the laminated rubber 4 and holds the pair of flange plates 7 and 8 at a predetermined interval in a state where the laminated rubber 4 is pre-compressed in the laminating direction. The link chain 9 can be bent between the link pieces 10, 11, and 12, and allows relative movement in the radial direction between the flange plate 7 and the flange plate 8.
The anti-vibration support device 1 may be configured without the link chain 9.

Enclosure members 14 are arranged on the outer periphery of the rubber plate 3 of the laminated rubber 4. These surrounding members 14 are formed in a ring body whose cross-sectional shape perpendicular to the circumferential direction is uniform over the entire circumference, and surrounds the outer periphery of the rubber plate 3 over the entire circumference. The inner peripheral surface of the surrounding member 14 is bonded to the outer peripheral surface, which is the outer peripheral portion of the rubber plate 3, so that the surrounding member 14 is fixed to the outer peripheral portion of the rubber plate 3. In addition, the inner peripheral surface of the surrounding member 14 is formed in a semicircular cross section by chamfering both axial edges.
The surrounding member 14 can be bonded and fixed to the outer peripheral surface of the rubber plate 3 by, for example, vulcanization bonding. In this case, vulcanization adhesion of the surrounding member 14 to the rubber plate 3 is performed by vulcanizing the rubber plate 3 with unvulcanized rubber in a state where the surrounding member 14 is set together with the hard plate 2 in a mold for vulcanization molding. This can be done by molding. At this time, an adhesive may be applied to the rubber plate 3 or the surrounding member 14 and then vulcanized and bonded.
The surrounding member 14 can be formed of, for example, a metal material such as a steel material or a hard resin material, and the tensile rigidity toward the outer side in the radial direction is higher than the tensile rigidity of the rubber plate 3. In the present embodiment, the surrounding member 14 is formed of a steel material. However, if the tensile rigidity toward the outside in the radial direction is higher than the tensile rigidity of the rubber plate 14, the surrounding member 14 is made of another material. It can also be formed.
The tensile rigidity is a force (load / deformation amount) necessary for unit deformation of the rubber plate 3 or the surrounding member 14 toward the radially outer side so as to increase the outer diameter thereof. Therefore, when the surrounding member 14 has higher tensile rigidity than the rubber plate 3, when the rubber plate 3 is crushed between the hard plates 2 by a compressive load in the stacking direction, the surrounding member 14 causes the rubber plate 3 to be crushed. The elastic deformation can be regulated so as not to be elastically deformed radially outward.
The surrounding member 14 is formed to be thinner in the stacking direction than the rubber plate 3, and is bonded and fixed to the central portion of the outer peripheral surface of the rubber plate 3 in the stacking direction. As a result, the surrounding member 14 is disposed away from the hard plate 2 in the stacking direction so that it does not come into contact with the hard plate 2 even when the rubber plate 3 is elastically deformed when the vehicle is running. The outer diameter of the surrounding member 14 is substantially the same as the outer diameter of the hard plate 2.

The surrounding member 14 can be configured to pre-compress the rubber plate 3 inward in the radial direction.
In the present embodiment, after the surrounding member 14 is bonded and fixed to the outer peripheral surface of the rubber plate 3, the surrounding member 14 is plastically deformed in the direction of reducing the diameter by using a caulking device or the like. As a result, a compression load directed radially inward is applied to the rubber plate 3, that is, the rubber plate 3 is pre-compressed, and the internal stress generated in the rubber plate 3 when receiving a tensile load in the stacking direction is reduced. Can be made.

  Next, the operation of the vibration isolating support device 1 according to the embodiment of the present invention will be described.

The anti-vibration support device 1 provides anti-vibration support for the load on the vehicle body by fixing the flange plate 7 on the lower end side to the suspension side of the construction vehicle and fixing the flange plate 8 on the upper end side to the vehicle body side of the construction vehicle. Can do.
When a vehicle body load, that is, a compressive load in the laminating direction, is applied to the rubber plate 3 constituting the laminated rubber 4, the rubber plate 3 is crushed between a pair of hard plates 2 and elastically deformed radially outward perpendicular to the laminating direction. try to. At this time, in the present invention, the outer periphery of the rubber plate 3 is surrounded by the surrounding member 14, and the elastic deformation of the rubber plate 3 to the outer side in the radial direction is restricted by the surrounding member 14. 3 becomes difficult to elastically deform, and the rigidity of the laminated rubber 4 against the compression load is increased. Accordingly, the outer periphery of the rubber plate 3 is surrounded by the surrounding member 14 even if the thickness of the rubber plate 3 in the stacking direction is increased to increase the resistance of the rubber plate 3 to a tensile load in the stacking direction. Thus, the rigidity of the laminated rubber 4 with respect to the compressive load can be maintained high. That is, the anti-vibration support device 1 can maintain a high load support function.

  Further, when a vibration with a large amplitude in a direction perpendicular to the lamination direction is applied to the prevention support device 1 in a state in which the load of the vehicle body is supported, the laminated rubber 4 is twisted and deformed, and one side in the amplitude direction of the rubber plate 3 is compressed. And the other side receives a tensile load. At this time, when the portion of the rubber plate 3 that receives the compressive load is crushed between the pair of hard plates 2 and pushed outward in the radial direction, the surrounding member 14 is pushed by the portion to be pushed of the rubber plate 3. It moves to radial direction, and pushes the outer peripheral surface of the part which receives the tensile load of the rubber plate 3 toward radial inner side. Therefore, the portion of the rubber plate 3 that receives the tensile load due to the twisting deformation is pushed radially inward by the surrounding member 14 in addition to forming the rubber plate 3 thick as described above, so that a compressive force is applied. This also reduces the internal stress.

As described above, in the vibration isolating support device 1 of the present invention, by surrounding the outer periphery of the rubber plate 3 with the surrounding member 14, the rigidity of the laminated rubber 4 against the compressive load in the laminating direction is maintained, and against the twist deformation. The yield strength of the rubber plate 3 can be increased.
As described above, since the inner peripheral surface of the surrounding member 14 is formed in a semicircular cross-section by chamfering both edges in the axial direction, the outer peripheral surface of the rubber plate 3 elastically deformed radially outward is It is possible to prevent the outer peripheral surface of the rubber plate 3 applied with a compressive load from being cut at the edge of the inner peripheral surface of the surrounding member 14 so that the elastic member can be smoothly elastically deformed on both sides in the axial direction of the surrounding member 14. it can.

  FIG. 3 is a cross-sectional view of a modification of the vibration isolating support device shown in FIG. In FIG. 3, members corresponding to those described above are denoted by the same reference numerals.

In the case shown in FIG. 1, the thicknesses of the rubber plates 3 in the stacking direction are made the same, and the surrounding members 14 are provided on the outer periphery of all the rubber plates 3.
On the other hand, in the modification shown in FIG. 3, the thickness dimension of the rubber plate 3 constituting the laminated rubber 4 is increased gradually or stepwise from the upper side to the lower side in the figure, and the lower three layers The thickness of the rubber plate 3 is maximized. The surrounding member 14 is provided only on the outer periphery of the lower three-layer rubber plate 3 having the largest thickness. These surrounding members 14 have the same configuration as the surrounding member 14 shown in FIG. 1, and are fixed to the outer peripheral surface of the rubber plate 3 by vulcanization bonding over the entire periphery.

  Depending on the link structure of the suspension to which the lower flange plate 7 is fixed, when the laminated rubber 4 is subjected to a twisting deformation, the lower three layers of the rubber plate 3 on the flange plate 7 side are accompanied by the twisting deformation. Large tensile loads may be applied. In such a case, as in the modification shown in FIG. 3, by making the thickness of the lower three-layer rubber plate 3 to which a large tensile load accompanying the twisting deformation is applied larger than the thickness of the other rubber plate 3, The durability of the laminated rubber 4 against twisting deformation can be enhanced without reducing the rigidity of the laminated rubber 4 against the compressive load. Further, by providing the surrounding member 14 only on the outer periphery of the thickest rubber plate 3, the increase in the number of components can be minimized and the increase in cost of the vibration isolating support device 1 can be minimized.

  Below, the comparison with the Example of this invention and a comparative example is demonstrated. In addition, this invention is not limited to this Example.

  The anti-vibration support device of the example is the configuration of the anti-vibration support device 1 shown in FIG. 1 and FIG. 2, that is, a configuration in which a surrounding member is bonded and fixed to the outer periphery of the rubber plate. The thickness is 25 mm, and the thickness of the surrounding member is 10 mm. On the other hand, the anti-vibration support device of Comparative Example 1 has a configuration in which no surrounding member is provided on the outer periphery of the rubber plate, and the rubber plate has a diameter of 240 mm and a thickness of 17.5 mm. Note that the thickness of the rubber plate of the vibration isolating support device of the comparative example is the same as that of the rubber plate in the lamination direction so that the rigidity of the laminated rubber against the compressive load in the lamination direction is the same. It is made smaller than the said thickness dimension of the rubber plate of an example. Since the rubber plate of the embodiment is enhanced in rigidity by the surrounding member, the same rigidity can be obtained even if the thickness dimension is increased as compared with the case where the surrounding member is not provided.

Regarding Examples and Comparative Examples, the change in the internal stress of the elastic body with respect to the tensile load in the stacking direction is a condition in which one hard plate is fixed and the tensile load is uniformly applied to the other hard plate on the plate surface. Below, it analyzed using the finite element method. The results are shown in FIGS.
As shown in FIG. 4, since the rubber plate of the example has a larger thickness than the rubber plate of the comparative example, the tensile load is applied even though the rigidity against the compressive load is the same as that of the comparative example. The value of the internal stress generated when it is applied is about 13.5% smaller than that of the comparative example. As shown in FIG. 5 (a), in the comparative example, the internal stress is concentrated in the central portion in the width direction of the rubber plate, whereas in the embodiment, it occurs in the rubber plate as shown in FIG. 5 (b). It can be seen that the internal stress is generally smaller than that of the comparative example. In particular, the decrease in internal stress is significant at the central portion of the rubber plate in the stacking direction. In FIG. 5, the darker the color, the higher the internal stress.

Moreover, about the Example and the comparative example, the change of the internal stress of the rubber plate with respect to the tensile load when it received a twist deformation was analyzed using the finite element method, respectively. The results are shown in FIGS.
As shown in FIG. 6, the internal stress value of the rubber plate of the example is 54.5% as a whole compared to the internal stress value of the comparative example with respect to the tensile force generated when subjected to the twisting deformation. It is getting smaller. As shown in FIG. 7 (a), in the comparative example, the internal stress is concentrated at the central portion in the width direction of the rubber plate, whereas as shown in FIG. 7 (b), it occurs in the rubber plate in the embodiment. It can be seen that the internal stress is generally smaller than that of the comparative example. In particular, the decrease in internal stress is significant at the central portion of the rubber plate in the stacking direction. In FIG. 7, the darker the color, the higher the internal stress.

  When a tensile force is applied in the stacking direction, the value of the internal stress of the example is reduced by 13.5% with respect to the value of the internal stress of the comparative example, whereas when a twisting deformation is applied. The value of the internal stress of the example is reduced by 54.5% with respect to the value of the internal stress of the comparative example. Therefore, not only the effect of reducing internal stress by increasing the thickness of the rubber plate, but also the elasticity of the surrounding member that receives the compressive load of the rubber plate due to the twisting deformation, against the tensile load due to the twisting deformation. The internal stress of the rubber plate is also reduced by applying a compressive force directed radially inward from the surrounding member to the portion that receives the tensile load due to the twisting deformation of the rubber plate due to the deformation. I understand.

  As described above, the anti-vibration support device of the example has higher durability against the tensile load although the rigidity against the compressive load is the same as the anti-vibration support device of the comparative example. Therefore, the anti-vibration support device of the example can maintain a high load support function while improving the durability against the twisting deformation as compared with the comparative example.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, in the above-described embodiment, the surrounding member 14 is formed in a ring body. However, the present invention is not limited to this, and the surrounding member 14 is configured by a plurality of surrounding pieces divided in the circumferential direction. It can also be set as the structure which connected the piece to the circumferential direction by fastening means, such as a volt | bolt and a nut. In this case, the surrounding member 14 may be configured such that the surrounding pieces are arranged at intervals in the circumferential direction as long as the surrounding pieces are connected to each other over the entire circumference. Each of the surrounding pieces is fixed to the outer peripheral surface of the rubber plate on the inner peripheral surface thereof.

  In the above embodiment, the surrounding member 14 is provided on the outer periphery of all the rubber plates 3 as shown in FIG. 1, or the outer periphery of only the three lower rubber plates 3 as shown in FIG. Although the member 14 is provided, the surrounding member 14 can be provided on the outer periphery of a desired rubber plate 3 that needs to reduce the internal stress with respect to the tensile load.

  Furthermore, in the said embodiment, although the vibration isolating support apparatus 1 of this invention is used for the suspension of a construction vehicle, it is not restricted to this, For example, the vibration isolating support apparatus 1 of this invention is a building structure. It can also be used for other applications such as a vibration isolator disposed between a vibration isolating structure, a vibration generating unit such as an engine or a motor, and a vibration receiving unit such as a floor or a vehicle body.

  Furthermore, in the said embodiment, although the inner peripheral surface of the surrounding member 14 is adhere | attached on the outer peripheral surface of the rubber plate 3 by vulcanization adhesion, it is not restricted to this, The rubber plate after vulcanization molding is carried out The inner peripheral surface of the surrounding member 14 may be bonded and fixed to the outer peripheral surface 3 using an adhesive or the like.

1: Anti-vibration support device 2: Hard plate 3: Rubber plate (elastic body) 4: Laminated rubber (laminated body) 7, 8: Flange plate 14: Go member

Claims (5)

An anti-vibration support device having a laminate formed by alternately laminating a hard plate and an elastic body, and a pair of flange plates arranged at both ends in the lamination direction of the laminate,
On the outer periphery of the elastic body of at least one layer, an enclosing member that surrounds the outer periphery of the elastic body is provided,
The vibration isolating support device, wherein the surrounding member has higher tensile rigidity than the elastic body, and is fixed to an outer peripheral portion of the elastic body.   The vibration isolation support device according to claim 1, wherein the surrounding member is formed in a ring body, and an inner peripheral surface thereof is fixed to an outer peripheral surface of the elastic body over the entire periphery.   The vibration isolation support device according to claim 1, wherein the surrounding member is configured by connecting a plurality of surrounding pieces in a circumferential direction, and each surrounding piece is fixed to an outer peripheral surface of the elastic body on an inner peripheral surface.   The vibration isolating support device according to any one of claims 1 to 3, wherein the surrounding member is spaced apart from the hard plate in the stacking direction.   The anti-vibration support device according to any one of claims 1 to 4, wherein the elastic body is pre-compressed radially inward by the surrounding member.