JP4395294B2 - Damping joint - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration damping joint. The present invention relates to a damping joint that has a particularly high joint strength and rigidity at a joint portion and is thin.
[0002]
[Prior art]
10 to 12 show examples of passive vibration damping joints in the prior art. FIG. 10 shows a damping joint having a structure in which a disc 202 and a disc 203 are bonded to both ends of a damping material 201 such as silicone rubber. A male screw 204 is fixed to the disc 202, and a male screw 205 is fixed to the disc 203. The structures are fixed by coupling the structures to male screws 204 and 205, respectively. The vibration damping joint of FIG. 10 has a structure using a vibration damping material as a direct coupling member.
[0003]
FIG. 11 shows a structure in which the structure 210 and the structure 211 are coupled to each other, and is a vibration damping joint having a structure in which vibration damping materials 214, 215, and 216 are sandwiched and fastened by bolts 212 and nuts 213.
[0004]
FIG. 12 shows a vibration-damping joint having a structure in which piston-type coupling members 221 and 222 are held by an O-ring-shaped or spherical vibration-damping material 226 in a cylinder-shaped housing structure divided into two parts 223 and 224. It is. In the vibration damping joint of FIG. 12, the structures are coupled to each other by fixing the structures to be coupled to the coupling members 221 and 222, respectively.
[0005]
[Problems to be solved by the invention]
In the structure of FIG. 10, since the structures to be coupled are directly coupled with the damping material 201, the damping material 201 is required to have strength and rigidity that can withstand the coupling. However, the damping material 201 has low strength and rigidity due to its properties. Therefore, the bonding strength between the structures cannot be increased, and the reliability as a joint cannot be increased. Further, since the damping material 201 becomes a coupling member, the temperature characteristic of the damping material directly affects the rigidity of the joint, and there is a problem that the vibration characteristic of the structure coupled by the damping joint becomes unstable.
[0006]
In the structure of FIG. 11, the rigidity characteristic is likely to change depending on the tightening state of the fastener, and the vibration damping performance is likely to vary depending on the manner of attachment work. Therefore, there is anxiety in terms of obtaining stable performance. In the structure of FIG. 11 as well, as in the structure of FIG. 10, the temperature characteristics of the vibration damping material directly affect the rigidity of the joint, and the vibration characteristics of the structure coupled by the vibration damping joint are not effective depending on the environmental temperature. There is a problem that becomes stable.
[0007]
The structure of FIG. 12 can secure a certain degree of strength and rigidity in the joint portion by the storage structure composed of 223 and 224. However, only vibrations in the one-dimensional direction indicated by 227 can be suppressed.
[0008]
An object of the present invention is to provide a vibration-damping joint excellent in rigidity and strength of a coupling portion. Another object of the present invention is to provide a vibration damping joint that can reduce the temperature dependence of the vibration characteristics of the combined structure. Another object of the present invention is to provide a damping joint that can obtain a damping effect regardless of the direction of vibration. Another object of the present invention is to provide a thin damping joint.
[0009]
[Means for Solving the Problems]
Hereinafter, the present invention and others will be described. According to a first aspect of the present invention, there is provided a first bending elastic plate to which a damping material is fixed and one surface of the first bending elastic plate, and the first bending elastic plate is coupled to the first member. A damping joint comprising: first coupling means; and a plurality of second coupling means arranged on the other surface of the first bending elastic plate for coupling the first bending elastic plate to the second member. is there.
[0010]
The damping material is an elastic material that absorbs vibration. Examples of the vibration damping material include various materials such as silicone rubber, gel material, and the like. As the damping material, a commercially available material for damping or damping can be used. Further, as the vibration damping material, an adhesive material having elasticity in a cured state, or an adhesive material that maintains an adhesive function in a state where it is not completely cured (semi-cured state) and simultaneously functions as an elastic material can be used. Examples of such an adhesive material include rubber-based or silicone-based adhesive materials. In the case of using an adhesive material, an uncured adhesive material may be applied to the bending elastic plate and cured or semi-cured. Moreover, you may utilize this adhesive material for adhesion | attachment of the restraint member mentioned later. In this case, since the adhesive material functions as a damping material, it is not necessary to prepare a damping material separately.
[0011]
The bending elastic plate refers to a plate-like member having elasticity that can be bent. The bending elastic plate is preferably a flat plate in order to pursue thinness. If the thinness is sacrificed to some extent, it may be a conical shape with a shallow depth or a shape like a dish. As the bending elastic plate, a hard material can be selected in order to ensure strength and rigidity. As the bending elastic plate, metal, ceramics, hard resin or composite material can be selected.
[0012]
As the first member, for example, one of two structures to be jointed or another bending elastic plate can be cited. Moreover, as a 2nd member, the other of the two structures which are the object to joint, or another bending elastic board is mentioned, for example. The coupling means refers to means for fixing members together. The term “member” includes a part or all of various parts and structures.
[0013]
The coupling means includes a screw member such as a male screw or a female screw, a structure that is fixed to a mating member by a hook, a structure that receives a hook, or a structure that is fixed by a fitting type (a structure that receives or is fitted) ). The coupling means also includes a structure that is fixed to the mating member by welding, brazing, or adhesion, or a structure that is secured to the mating member by a magnet or rivet.
[0014]
According to the first invention, vibration propagating between the first member and the second member can be reduced by vibrating the first bending elastic plate and absorbing the vibration energy with the damping material. Since a bending elastic board can be comprised with hard materials, such as a metal, the intensity | strength and rigidity of a joint part at the time of utilizing as a joint are securable. Further, since vibration is absorbed by deformation of the bending elastic plate, vibration can be suppressed regardless of the direction of vibration. Moreover, since the bending elastic plate can be made thin, the size in the joint direction can be reduced, and even when the first member and the second member are close to each other, it can be handled.
[0015]
According to a second invention, in the first invention, a second bending elastic plate disposed to face the first bending elastic plate, and a surface of the second bending elastic plate opposite to the surface facing the first bending elastic plate. It further includes a third coupling means disposed on the surface for coupling the second bending elastic plate with the third member, and a damping material fixed to the second bending elastic plate.
[0016]
According to the second aspect of the invention, a vibration damping action is obtained in the first and second bending elastic plates, and vibrations transmitted between the first member and the third member can be reduced.
[0017]
According to a third invention, in the first or second invention, the first bending elastic plate is a flat plate. By making the bending elastic plate a flat plate, the thickness of the joint can be reduced, and the damping joint can be arranged even if there is a gap between the members to be joined.
[0018]
According to a fourth invention, in any one of the first to third inventions, a restraining member is fixed in contact with the vibration damping material. The restraining member is fixed to the damping material, and restrains the expansion and contraction of the damping material surface that occurs as it receives vibration. It is preferable that the restraining member has a rigidity that exhibits a restraining force. By fixing the restraining member to the damping material, when the damping material is subjected to vibration, periodic shear deformation occurs between the vibrating part and the restrained part inside it, making the vibration more efficient Can absorb well.
[0019]
According to a fifth invention, in any one of the first to fourth inventions, a groove or a protrusion is formed on one surface or both surfaces of the first bending elastic plate, and the surface on which the groove or the protrusion is formed, or the groove A damping material is fixed to the inside of the projection or the side surface of the projection.
[0020]
In the fifth aspect of the invention, the meaning of the surface on which the groove is formed does not include the surface inside the groove. Further, the surface on which the protrusion is formed refers to the surface of the upper portion of the protrusion. If a groove is formed in the bending elastic plate, the strain center at the time of vibration in the thickness direction of the bending elastic plate is biased to the surface side where the groove is not formed, and on the other hand, the strain on the surface side where the groove is formed is large. Become. Thereby, the strain applied to the vibration damping material fixed to the surface where the groove is formed or inside the groove can be increased, and the vibration damping effect can be enhanced. The protrusion refers to a shape protruding in a convex shape on the surface of the bending elastic plate, contrary to the groove. In addition, when the width of the groove is increased, a portion that is not a groove can be regarded as a protrusion. When the protrusion is formed, the strain center is biased to the surface side where the protrusion is not formed, and the distortion of the upper surface of the protrusion is increased. Thereby, the distortion added to the surface on which the protrusion is formed or the vibration damping material fixed to the side surface of the protrusion can be increased, and the vibration suppression effect can be increased.
[0021]
In a sixth aspect based on any one of the first to fifth aspects, the first bending elastic plate is circular, elliptical or polygonal, and the first coupling member is the center of the first bending elastic plate or The second coupling member is arranged in the vicinity of the center, and is arranged at a plurality of positions surrounding the center of the first bending elastic plate or the vicinity of the center.
[0022]
The vicinity of the center means a position where the deviation from the center is within 30%, preferably within 10% when viewed from the overall dimensional ratio. The plurality of positions surrounding the center or the vicinity of the center are preferably equidistant from the center or the vicinity of the center, respectively.
[0023]
According to the sixth aspect of the invention, the bending elastic plate is effectively deformed by the force applied between the coupling position by the first coupling member and the coupling position by the second coupling member, and the flexural elasticity is efficiently converted by the received vibration energy. The plate can be vibrated. Thereby, vibration suppression can be performed more effectively.
[0024]
A seventh invention is characterized in that, in the fifth or sixth invention, the groove or the protrusion is formed radially or concentrically around the position where the first coupling member is disposed. According to the seventh aspect, since the groove or the protrusion is formed at a position corresponding to the vibration state, the effect obtained by forming the groove or the protrusion can be further increased.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention can be implemented in many different modes and should not be interpreted as being limited to the description of the present embodiment. In addition, the same number shall be attached | subjected to the same element through the whole.
[0026]
FIG. 1 is a perspective view showing an example of a vibration damping joint of the present invention. FIG. 1 shows a bending elastic plate 101, a bending elastic plate 102, a first coupling member 105, a screw 104, a second coupling member 103, a third coupling member 106, a damping material 108, and a damping material 110. . FIG. 1A is a perspective view seen from the bending elastic plate 101 side, and FIG. 1B is a perspective view seen from the bending elastic plate 102 side.
[0027]
FIG. 2 is a side view of the vibration damping joint shown in FIG. Fig.2 (a) is a side view of the state which couple | bonded a pair of bending elastic board, FIG.2 (b) is a side view which shows the state assembled. FIG. 2 shows a restraining member 109 disposed in contact with the damping material 108 and a restraining member 111 disposed in contact with the damping material 110.
[0028]
The bending elastic plate 101 and the bending elastic plate 102 are made of thin metal and have a circular shape.
[0029]
The first coupling member 105 is a male screw fixed to the central portion of the bending elastic plate 101. The first coupling member 105 is a member for coupling the bending elastic plate 101 to a structure not shown.
[0030]
The second coupling member 103 is made of a cylindrical metal, and has a female screw structure (not shown) at both ends. The second coupling member 103 couples the bending elastic plate 101 and the bending elastic plate 102 with a screw 104. In this example, there are six second coupling members 103, and the bending elastic plate 101 and the bending elastic plate 102 are coupled to each other at six locations by the second coupling member 103.
[0031]
In the bending elastic plate 101, the first coupling member 105 is located at the center of the six coupling positions by the second coupling member 103.
[0032]
The third coupling member 106 is a member for coupling the bending elastic plate 102 to another structure not shown. In the bending elastic plate 102, the third coupling member 106 is located at the center of the six coupling positions by the second coupling member 103.
[0033]
The damping materials 108 and 110 are elastic materials with high damping properties. As the vibration damping material, for example, a silicone rubber or a synthetic rubber marketed for vibration damping applications can be used. The damping material 108 is processed into a circular flat plate shape. The damping material 108 and the damping material 110 are fixed to the bending elastic plates 101 and 102 by an adhesive, respectively. The restraining members 109 and 111 are circular metal plates. As the restraining member, a material having a large specific gravity such as lead can be used. The restraining members 109 and 111 are fixed to the damping material 108 and the damping material 110 with an adhesive, respectively.
[0034]
In addition, as the damping material 108 and the damping material 110, it is also possible to use an adhesive material that maintains an adhesive function in a state of being cured or semi-cured without being completely cured, and at the same time has elasticity. In this case, the binding member is bonded to the elastic plate with the adhesive material, and the cured or semi-cured adhesive material functions as a vibration damping material.
[0035]
FIG. 3 is a perspective view showing the structure of the facing surface of the bending elastic plate 101 (the surface facing the bending elastic plate 102). FIG. 3A is a perspective view showing a state where the damping material 108 and the restraining member 109 are not fixed. FIG. 3B is a perspective view showing a state in which the damping material 108 is fixed to the bending elastic plate 101 and the restraining member 109 is fixed to the damping material 108.
[0036]
As shown in FIG. 3A, grooves 113 are formed concentrically and radially on the opposing surface of the bending elastic plate 101. The groove 113 has a role of causing the vibration damping material 110 to efficiently absorb vibration energy as described later. Although not described, the structure of the surface of the bending elastic plate 102 facing the bending elastic plate 101 is the same as that of the bending elastic plate 101 described above.
[0037]
FIG. 4 is a diagram illustrating an example of a usage state of the vibration damping joint illustrated in FIG. 1. FIG. 4 shows a state where the damping table 121 is fixed on the pedestal 122 via the damping joint 120. In the example of FIG. 4, the damping table 121 is fixed to the base 122 by the damping joint 120 at the four corners of the lower surface. The vibration control table 121 is a table on which, for example, equipment that needs to eliminate vibrations as much as possible is placed.
[0038]
FIG. 5 is a diagram illustrating a procedure for fixing the vibration damping table 121 on the pedestal 122. First, the damping table 121 is positioned on the pedestal 122, and the damping joint 120 is positioned between the two at the four corners. Further, the female screw 106 of the damping joint 120 is turned into the male screw 123 fixed to the pedestal 122, and at the same time, the male screw 105 of the damping joint 120 is turned into the female screw of the damping table 121 (not shown). This operation is performed simultaneously at the four corners of the base 122 and the vibration control table 121. In this way, the damping table 121 is fixed to the base 122 by the four damping joints 120.
[0039]
Here, although the example which fixes a damping table to a base using a damping joint was demonstrated, utilization of a damping joint is not limited to this example. For example, there is an example in which a device is fixed to a housing, a floor, or the like via a vibration damping joint so that vibration from the device that generates vibration is not transmitted to others. Moreover, when storing the apparatus which dislikes vibration inside the apparatus which emits vibration, the example which fixes this apparatus in an apparatus via a damping joint is mentioned. Moreover, the example which fixes and stores the apparatus which generate | occur | produces a vibration via a damping joint in an apparatus is mentioned. As described above, the vibration damping joint can be widely used as a coupling means for a portion that does not want to transmit vibration or suppresses transmission of vibration.
[0040]
Next, the effect of forming grooves in the bending elastic plate will be described. FIG. 6 is an example of a cross-sectional view of a bending elastic plate. FIG. 6A shows a state in which a groove 602 is formed on one surface of the bending elastic plate 601. When the groove 602 is formed, a biased position 603 on the surface side where the groove 602 is not formed becomes the strain center during vibration. Incidentally, if the groove 602 is not formed, the strain center is the central portion in the thickness direction of the bending elastic plate 601. Here, it is assumed that the bending elastic plate is made of a homogeneous material. As shown in FIG. 6A, when the strain center is biased toward the surface where the groove 602 is not formed, the strain on the surface where the groove 602 is formed is indicated by 604 when the bending elastic plate 601 vibrates. growing. Note that a convex portion sandwiched between the grooves 602 can also be regarded as a protrusion.
[0041]
FIG. 6B is a cross-sectional view showing a state in which the damping material 605 is fixed to the surface of the bending elastic plate 601 on which the groove 602 is formed, and the restraining member 606 is further fixed thereon.
[0042]
In the state of FIG. 6B, the groove 602 is not filled and remains as a space without a filling. When the bending elastic plate 601 vibrates, the surface of the damping material 605 that contacts the bending elastic plate 601 is repeatedly subjected to tensile stress and compressive stress due to the vibration of the bending elastic plate 601. Since the vibration damping material has an elastic structure, a resistance force is generated when strain is applied, and the strain energy is converted into thermal energy. Thereby, the vibration energy of the bending elastic plate 601 is consumed by the damping material 605, and a damping action is obtained. At this time, if the groove 602 is formed, the strain on the surface of the bending elastic plate 601 that is in contact with the vibration damping material 605 increases, so that a stronger strain is transmitted to the vibration damping material 605. As a result, more vibration energy is consumed by the damping material 605 than when the groove 602 is not formed.
[0043]
This vibration damping action is particularly noticeable when the restraining member 606 is attached. As described above, the formation of the groove 602 increases the distortion on the surface side where the groove 602 is formed when the bending elastic plate 601 vibrates. This strain is transmitted to the damping material 605 in contact with the bending elastic plate 601. On the other hand, since the restraining member 606 is fixed to the surface opposite to the surface that receives the strain of the damping material 605, the occurrence of strain is suppressed. That is, the surface on which the restraining member 606 is fixed is restrained by the restraining member in terms of expansion or contraction. As a result, repeated periodic shear deformation occurs in the damping material 605, and vibration energy is consumed in the damping material 605 with higher efficiency than when the restraining member 606 is not attached. .
[0044]
In this way, by forming the groove in the bending elastic plate, the vibration energy can be effectively absorbed by the damping material. Moreover, the effect of a restraining member can be exhibited more highly. The above effects can be similarly pointed out even when protrusions are formed on the bending elastic plate.
[0045]
FIG. 6C is a cross-sectional view showing an example of a structure in which a damping material 607 is filled in a groove 602 formed on the surface of the bending elastic plate 601. Even in the case of the configuration illustrated in FIG. 6C, when the bending elastic plate 601 is vibrated, the strain on the surface side where the groove 602 is formed becomes large, and this strain is applied to the damping material 607 in the groove. . Thereby, the vibration generated in the bending elastic plate 601 can be suppressed. The configuration illustrated in FIG. 6C is useful when the vibration damping joint is made thinner.
[0046]
In addition, you may employ | adopt the structure which combined the structure illustrated in FIG.6 (b), and the structure illustrated in FIG.6 (c). That is, a configuration may be adopted in which a groove is formed on the surface of the bending elastic plate, and the damping material is disposed in contact with this surface and the inside of the groove. Also in this case, it is preferable to fix the restraining member to the surface of the damping material.
[0047]
Next, the effect of the groove shape (the shape drawn on the surface of the bending elastic plate by the groove) will be described. In the structure illustrated in FIGS. 1 to 3, a force is applied between the central portion of the bending elastic plate 101 and the six connecting portions of the bending elastic plate 102 by the second connecting member equidistant from the bending elastic plate 101. The elastic plate 101 vibrates. At this time, the vibration pattern generated in the bending elastic plate 101 is a symmetrical pattern with respect to the point where the first coupling member is fixed (the center point of the bending elastic plate 101).
[0048]
The action described with reference to FIG. 6 is most effective when the position where strain concentrates during vibration is distributed linearly along the groove. As described above, since the vibration pattern has symmetry with respect to the point where the first coupling member is fixed, the position where the strain concentrates also has symmetry with respect to the point where the first coupling member is fixed. Therefore, the operation described with reference to FIG. 6 can be more effectively obtained by making the pattern of the groove 113 a symmetric radial or circumferential pattern around the point where the first combination is fixed.
[0049]
Although the bending elastic plate 101 has been described above, the same can be pointed out in the bending elastic plate 102.
[0050]
Next, the damping action of the damping joint illustrated in FIGS. 7 and 8 are model diagrams for explaining the vibration damping action at the vibration damping joint. 7 and 8, the deformation of the bending elastic plate is exaggerated for easy understanding. In the following description, a basic vibration mode is taken as an example.
[0051]
FIG. 7 is a model diagram showing a state in which vibration having an amplitude is applied in a direction perpendicular to the bending elastic plate. FIG. 7A shows a state in which a force is applied in a direction in which the bending elastic plate 101 and the bending elastic plate 102 are separated from each other. FIG. 7B shows a state in which a force is applied in the direction in which the bending elastic plate 101 and the bending elastic plate 102 are brought close to the case of FIG. The vibration applied in the direction perpendicular to the bending elastic plates 101 and 102 causes the bending elastic plates 101 and 102 to repeatedly cause deformation as illustrated in FIG. The deformations that occur periodically in the bending elastic plates 101 and 102 are applied to the damping materials 108 and 110, respectively. The energy is consumed by the damping materials 108 and 110. In this way, vibration applied in the direction perpendicular to the bending elastic plates 101 and 102 is damped.
[0052]
FIG. 8 is a model diagram showing a state in which a vibration having an amplitude in a direction parallel to the surface of the bending elastic plate is applied to the damping joint. FIG. 8A shows a state in which a reverse force is applied to the first coupling member 105 and the third coupling member 106. FIG. 8B shows a state where a force in the same direction is applied to the first coupling member 105 and the third coupling member 106.
[0053]
The vibration applied in the direction parallel to the surfaces of the bending elastic plates 101 and 102 causes the bending elastic plates 101 and 102 to undergo deformation as illustrated in FIG. This deformation of the bending elastic plates 101 and 102 occurs periodically and repeatedly, which is applied to the damping materials 108 and 110, respectively. As a result, the vibration energy of each bending elastic plate is consumed by the damping materials 108 and 110, respectively. In this way, vibration applied in a direction parallel to the surfaces of the bending elastic plates 101 and 102 is suppressed.
[0054]
As described above, the vibration damping joint illustrated in FIGS. 1 to 3 can obtain a vibration damping effect regardless of the amplitude direction of vibration.
[0055]
The vibration damping joint illustrated in FIGS. 1 to 3 does not use a vibration damping material such as rubber as a coupling member, so that rigidity and strength at a coupling portion between structures can be ensured. In other words, the bending elastic plates 101 and 102 are members that function as bending elastic plates, but a material that is much more rigid than a vibration damping material such as a rubber member can be used. Also, the bending elastic plates 101 and 102 can be used. Is coupled at a plurality of locations by the second coupling member 103, so that high strength and rigidity can be obtained at the coupling portion between the structures.
[0056]
Further, by adopting a material having relatively small temperature dependence of mechanical properties as the bending elastic plate, it is possible to reduce the temperature dependence of the vibration characteristics of the structures coupled by the damping joint using the present invention.
[0057]
Further, as described in the examples of FIGS. 7 and 8, vibration in the three-dimensional direction can be suppressed. In other words, a damping effect can be obtained regardless of the direction of vibration. Further, the thickness of the vibration damping joint may be a dimension that allows the bending elastic plates to face each other with a gap therebetween, and a thin vibration damping joint can be obtained. Thereby, it can utilize even when the clearance gap between the structures couple | bonded via a damping joint is narrow.
[0058]
Also, the stiffness and damping characteristics of the damping joint (vibration frequency to be controlled, etc.) are determined by the material of the bending elastic plate, the thickness of the bending elastic plate, the diameter of the bending elastic plate, the shape of the bending elastic plate, the coupling It can be set as appropriate depending on the number of members, and can be applied to a wide range.
[0059]
FIG. 9 is a perspective view showing another example of the present invention. FIG. 9 shows an example of a vibration damping joint having a structure in which two structures are connected via one bending elastic plate. FIG. 9A is a side view, and FIG. 9B is a perspective view. FIG. 9 shows the bending elastic plate 101, the first coupling member 105, the second coupling member 103, the screw 104, and the structure 131.
[0060]
As illustrated in FIGS. 1 to 3, a groove is formed in the bending elastic plate 101, and the damping material 108 and the restraining member 109 are fixed. The first coupling member 105 is coupled to a structure (not shown) that is a coupling partner of the structure 131. The bending elastic plate 101 and the structure 131 are coupled by the second coupling member 103. In the example of FIG. 9, the second coupling member 103 has a cylindrical structure, and the second coupling member 103 is passed through the second coupling member 103 and turned into a screw hole (not shown) of the structure 131, thereby The bending elastic plate 101 is fixed to the structure 131 by 103.
[0061]
This vibration damping joint has two structures by connecting one structure (not shown) to the first connecting member 105 and connecting the other structure (in this case, the structure 131) to the second connecting member 103. To combine. Also in the vibration damping joint illustrated in FIG. 9, vibration generated in the bending elastic plate 101 is converted into thermal energy by the vibration damping material 108 and vibration damping is performed.
[0062]
Although the present invention has been specifically described above based on the embodiments, the present invention is not limited to the above-described embodiments, and can be modified without departing from the gist thereof.
[0063]
【The invention's effect】
Among the inventions disclosed in the present application, effects obtained by typical ones are as follows. That is, according to the present invention, a vibration-damping joint excellent in the rigidity and strength of the coupling portion is provided. In addition, according to the present invention, there is provided a damping joint that can reduce the temperature dependence of the vibration characteristics of the combined structure. In addition, according to the present invention, there is provided a damping joint that can obtain a damping effect regardless of the direction of vibration. Further, the present invention provides a thin damping joint.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a vibration damping joint of the present name.
FIG. 2 is a cross-sectional view of the vibration damping joint shown in FIG.
FIG. 3 is a perspective view showing an example of a bending elastic plate.
4 is a diagram illustrating an example of a usage state of the vibration damping joint illustrated in FIG. 1; FIG.
FIG. 5 is a diagram illustrating an example of a procedure for using the vibration damping joint illustrated in FIG. 1;
FIG. 6 is an example of a cross-sectional view of a bending elastic plate.
FIG. 7 is a model diagram showing a state when vibration having amplitude is applied in a direction perpendicular to the bending elastic plate.
FIG. 8 is a model diagram showing a state in which a vibration having an amplitude in a direction parallel to the surface of the bending elastic plate is applied to the damping joint.
FIG. 9 is a perspective view showing another example of the present invention.
FIG. 10 is an example of a vibration damping joint in the prior art.
FIG. 11 is an example of a vibration damping joint in the prior art.
FIG. 12 is an example of a vibration damping joint in the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 101 ... Bending elastic board, 102 ... Bending elastic board, 103 ... 2nd coupling member, 104 ... Screw, 105 ... 1st coupling member 106 ... 3rd coupling member, 108 ... Damping material, 109 ... Restraining member, 110 ... Damping Damping material, 111 ... Restraining member, 113 ... Groove, 120 ... Damping joint, 121 ... Damping table, 122 ... Base, 123 ... Male screw, 131 ... Structure, 201 ... Damping material, 202 ... Disc, 203 , Disk, 204, male screw, 205, male screw, 212, bolt, 213, nut, 214, damping material, 221, coupling member, 222, coupling member, 226, damping material, 601, bending elastic plate, 602: groove, 603: position of strain center, 605 ... damping material, 606 ... restraining member, 607 ... damping material.

Claims (7)

A first bending elastic plate to which a damping material is fixed;
A first coupling means disposed at or near the center of one surface of the first bending elastic plate, for coupling the first bending elastic plate with the first member;
A second coupling means made of metal for coupling the first bending elastic plate to the second member, disposed at a peripheral position surrounding the center or the vicinity of the center of the other surface of the first bending elastic plate;
Damping joint including.   The damping joint according to claim 1, wherein the second coupling means is a plurality of second coupling means. A second bending elastic plate disposed opposite to the first bending elastic plate;
A third coupling means disposed on a surface opposite to the surface facing the first bending elastic plate of the second bending elastic plate, for coupling the second bending elastic plate with a third member;
A damping material fixed to the second bending elastic plate;
The vibration damping joint according to claim 1 or 2 , further comprising: The damping joint according to any one of claims 1 to 3, wherein the first bending elastic plate is a flat plate. The damping joint according to any one of claims 1 to 4, wherein a restraining member is fixed in contact with the damping material. A groove or protrusion is formed on one or both surfaces of the first bending elastic plate, and the damping material is fixed to the surface on which the groove or protrusion is formed, the inside of the groove, or the side surface of the protrusion. The damping joint according to any one of claims 1 to 5, wherein the damping joint is provided. The vibration control joint according to claim 6 , wherein the groove or the protrusion is formed in a radial shape or a concentric shape centering on a position where the first coupling means is disposed.

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