JP2011094678A - Vibration isolating component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration isolating component which is manufactured much easier than any conventional item using a viscous fluid and free of such a risk that viscous fluids leak out of the inside. <P>SOLUTION: The vibration isolating component 1 includes a first fixation part 3A, a second fixation part 3B, a spring part 5, and an elastomer part 7, wherein the first 3A and second fixation parts 3B are formed with a through-hole 13. As the elastomer part 7 is formed of a styrene-based elastomer having vibration suppressing property, there is no need to perform the fluid encapsulating work at manufacturing nor there is risk of the fluid leaking during service. The elastomer part 7 is formed with a cavity 21 which can be formed by inserting a core from the through-hole 13 at forming the elastomer part 7 and leaving it in place. At this time, the size of the cavity 21 may be adjusted by changing the inserting amount, so as to change the vibration damping characteristics. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vibration isolating component that suppresses vibration from being transmitted from one member to the other member by being interposed between two members.

  Conventionally, in home appliances (for example, DVD players, HDD recorders, etc.) incorporating a device that becomes a vibration source such as a motor, or devices that transmit external vibrations such as in-vehicle devices, self-vibration suppression, Alternatively, in order to suppress vibration from the outside, an anti-vibration component is interposed between the two members, and the vibration is absorbed by the anti-vibration component (see, for example, Patent Document 1).

JP 2006-275182 A

  However, since the vibration-proof component described in Patent Document 1 has a structure in which a viscous fluid such as silicone oil is sealed inside an outer skin formed of an elastomer material, ultrasonic welding is performed during the sealing operation. There is a problem that it takes a lot of labor in terms of productivity, such as requiring a step of sealing with, and the cost tends to increase accordingly.

  In addition, the outer shell made of elastomer material is made relatively thin, and some parts are extremely thin. If an object hits the outer skin of a part and damages the outer skin, the viscous fluid leaks out, which may cause the product to become dirty or malfunction.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is that it can be manufactured much more easily than conventional products using viscous fluid, and the viscous fluid leaks from the inside. The object is to provide an anti-vibration component that does not cause trouble.

Hereinafter, the configuration employed in the present invention will be described.
As described in claim 1, the vibration-proof component of the present invention is interposed between the first member and the second member by being interposed between the first member and the second member. A vibration-proof component that suppresses vibration from being transmitted from one member to the other member, the first fixing portion being fixed to the attachment target with the first member as the attachment target; A second fixing portion fixed to the attachment target with the second member as an attachment target, and the first fixing portion attached to one end in the axial direction and the second fixing portion at the other end in the axial direction Is attached, and when either the first member or the second member vibrates, the first fixing portion and the second fixing portion are elastically displaced. The first fixing with the restoring force generated by the deformation and the elastic deformation And a spring portion that urges the second fixing portion in a direction to return to the original positional relationship, and an elastomer material having vibration damping properties, and at least a part of the first fixing portion and the second fixing portion Between the first member and the second member, as one of the members vibrates, the first fixing portion and the second fixing portion are An elastomer part that elastically deforms when relatively displaced and attenuates the vibration by the viscoelasticity of the elastically deformed part, and at least one of the first fixing part and the second fixing part includes A through hole is formed through the one fixed portion in the axial direction so as to reach the elastomer portion.

  According to the vibration-proof component configured in this manner, the vibration-proof component is fixed by fixing the first fixing portion to the first member and fixing the second fixing portion to the second member. It can be interposed between the first member and the second member.

  In this state, either one of the first member and the second member vibrates, and a fixed portion (= first fixed portion or second fixed portion) fixed to the one member is present. Even if it vibrates, when the vibration is transmitted to the spring portion and the elastomer portion, the spring portion and the elastomer portion are elastically deformed to relieve or absorb the vibration.

  Particularly, in the elastomer part, as the elastomer part is deformed, the vibration is attenuated by the viscoelasticity of the deformed part. In addition, since the spring portion tries to return to the original shape by elasticity higher than that of the elastomer portion when elastically deformed, the elastomer portion also returns to the original shape following such a spring portion, At this time, the vibration is attenuated by the viscoelasticity of the portion that returns to the original shape. That is, since both the spring portion and the elastomer portion exist, the spring portion and the elastomer portion can cooperate to effectively attenuate the vibration.

  When the elastomer part is provided alone, it is difficult to properly maintain the gap between the first fixing part and the second fixing part if the elastomer part itself does not have a certain degree of hardness. If the portion is provided, the gap between the first fixed portion and the second fixed portion can be properly maintained by the elasticity of the spring portion. Therefore, there is no problem even if a relatively soft elastomer material is selected for the elastomer part, and an elastomer material having excellent vibration damping characteristics can be arbitrarily adopted, thereby improving the vibration damping characteristics of the vibration-proof component. it can.

  Furthermore, in this invention, the structure by which the through-hole is formed in at least one fixing part among the 1st fixing part and the 2nd fixing part is employ | adopted. The through hole penetrates the at least one fixed portion in the axial direction and reaches the elastomer portion.

  If such a through-hole is formed, when molding the elastomer part, the core material is passed through the through-hole, and the core material reaches the region inside the elastomer part, and the elastomer part is placed in this state. After molding by injection molding (molding method called outsert molding) or the like, a cavity can be formed inside the elastomer portion by removing the core material from the through hole.

  That is, as described in claim 2, the elastomer portion can be configured to have a cavity communicating with a through hole formed in at least one fixed portion. If such a cavity is formed in the elastomer part, the elastomer part can be deformed more flexibly and vibration damping characteristics can be improved.

  Further, as defined in claim 3, the cavity formed in the elastomer portion may be structured to penetrate the elastomer portion in the axial direction. If such a cavity penetrates the elastomer part, the elastomer part can be deformed more flexibly than when a cavity that does not penetrate is formed, and vibration damping characteristics are further improved. be able to.

  Further, when forming such a cavity, when inserting the core material into the region inside the elastomer part, the axial length of the cavity can be changed by changing the insertion length, or the volume can be changed, or By changing the diameter of the core material, the inner diameter or volume of the cavity can be changed. Alternatively, it is also possible to prevent a cavity from being formed in the elastomer part by intentionally keeping the core material only in the through hole of the at least one fixing part. Further, by inserting the core material up to the middle position of the through hole of the at least one fixing part, it is possible to form a structure in which a part of the elastomer part enters the through hole.

  Since the internal dimensions of the cavity can be arbitrarily changed in this way, even if the elastomer part is formed of the same material, the presence or absence of the cavity or the internal dimension of the cavity is changed by the above method. Thereby, the vibration damping characteristic of the elastomer part can be adjusted.

  In other words, by providing the through-holes as described above, the vibration damping of the elastomer part is not changed without any change in the constituent parts such as the first fixing part, the second fixing part and the spring part and the material forming the elastomer part. Sex can be controlled.

  In the vibration-proof component as described above, the first fixing portion and the second fixing portion are provided to fix the vibration-proof component to the first member and the second member, A specific structure is arbitrary as long as the structure can perform the intended fixation.

  As a specific example, as described in claim 4, the at least one fixing portion includes a pair of check protrusions protruding in the axial direction from the periphery of the opening at one end of the through hole, The pair of check protrusions are inserted from the one surface with respect to the attachment hole that penetrates the plate-like portion of the attachment target from one surface to the other surface, and at that time, in a state of being elastically deformed, The portion that has passed through the mounting hole and elastically deformed after passing through the mounting hole is expanded and engaged with the other surface, so that it cannot be pulled out from the mounting hole, and the mounting target It can be considered to be a structure that is fixed to.

  According to the fixing portion having such a structure, if an attachment hole is provided in the plate-like portion of the attachment target, the at least one fixing portion is fixed to the target portion simply by inserting the fixing portion into the attachment hole. Therefore, the efficiency of the mounting operation is better than that in which the attachment with the other side is screwed or the like.

  Other than this, for example, even if the efficiency of the attachment work is somewhat reduced, if it is a place where screwing is necessary, it is screwed into the screw holes provided on the first member side and the second member side. It is also possible to adopt a fixing structure capable of. Further, a fixing structure or the like that can be fitted into the mounting holes provided on the first member side and the second member side and press-contacted to the inside of the mounting holes may be employed.

  Moreover, both the 1st fixing | fixed part and the 2nd fixing | fixed part may have the same structure, and the structure from which a 1st fixing | fixed part and a 2nd fixing | fixed part differ may be employ | adopted. However, if the first fixing part and the second fixing part have the same structure, the parts to be both fixing parts can be shared in the manufacturing stage of the vibration-proof component, which is advantageous in terms of manufacturing cost. Further, when using the vibration-proof component, the vibration-proof component can be attached without being particularly aware of which is the first fixed portion and which is the second fixed portion, which is also advantageous in this respect.

  In addition, since the first fixing portion and the second fixing portion do not have to be formed of a material having vibration damping properties, a general material that can form this type of fixing structure is arbitrarily selected. Available to: If a specific example is given, a comparatively hard resin material can be used arbitrarily, for example, a polypropylene resin (PP), a polyacetal resin (POM), a polyamide resin (PA), etc. may be used.

  The elastomer part can be formed of various elastomer materials capable of absorbing vibration energy by converting it into heat. For example, the loss factor is about 0.3 or more and the hardness is about 10 to 40 in JIS A. Anything having damping properties can be used arbitrarily.

  Specific examples include various thermoplastic elastomers such as styrene-based, ester-based, amide-based, and urethane-based materials, hydrogenated products thereof, and other modified products. These may be used alone or in combination of two or more as long as they are compatible with each other.

  If such an elastomer material is used, unlike the conventional product having a structure in which a viscous fluid is enclosed, there is no need to perform the operation of enclosing the viscous fluid at the time of manufacture, and there is no risk of the viscous fluid leaking out during use.

  When the vibration that causes the vibration isolator to vibrate up, down, front, back, left and right is transmitted, various deformations such as compression deformation, bending deformation, and torsion deformation occur, and the spring part will return to its original shape with the elastic force that accompanies it. And such a spring portion can be constituted by, for example, a coil spring.

  Moreover, in the vibration-proof component of the present invention, as described in claim 5, the elastomer portion is in close contact with the attachment target when the at least one fixing portion is fixed to the attachment target. It is preferable that it has a close contact surface.

  If such an adhesion surface is provided, the elastomer part can be brought into close contact with the object to be attached. Therefore, unlike the case where an inclusion exists between the elastomer part and the object to be attached, the object to be attached and the inclusion are included. It is possible to prevent problems such as rattling between the two.

  Moreover, when providing the close contact surface as described above, when the close contact surface has a bottomed hole in which an opening is formed in the close contact surface and the close contact surface is in close contact with the attachment target, A structure may be employed in which the bottomed hole is sealed by closing the opening with the attachment target.

  If such a bottomed hole is provided, the bottomed hole acts as an air spring by being sealed with air in the bottomed hole, so that the vibration damping characteristics of the elastomer portion are improved. be able to.

  In the case where the contact surface as described above is provided, as described in claim 7, the at least one fixing portion has a flange portion in which the axial direction is a thickness direction, and the flange portion is the shaft. The at least one fixing part is fixed to the elastomer part by being held by the elastomer part from both sides in the direction, and when the at least one fixing part is fixed to the attachment target A structure may be employed in which the elastomer portion is in close contact with the attachment target on the contact surface by sandwiching a part of the elastomer portion between the attachment target and the flange portion.

  If such a structure is employ | adopted, by sticking a part of elastomer part between attachment object and a flange part, the contact | adherence surface of an elastomer part can be closely_contact | adhered with a stronger contact pressure with respect to an attachment object.

  Further, when both the bottomed hole and the flange portion as described above are employed, the configuration as described in claim 8 may be employed. That is, it has a bottomed hole in which an opening is formed in the contact surface, and when the contact surface is in close contact with the attachment target, the opening is closed by the attachment target, so that the bottomed hole is The at least one fixing portion has a flange portion in which the axial direction is a thickness direction, and the flange portion is held by the elastomer portion from both sides in the axial direction, whereby the at least one fixing portion is Is fixed to the elastomer part, and when the at least one fixing part is fixed to the attachment object, the elastomer part is interposed between the attachment object and the flange part. As a result of the portion being sandwiched, the elastomer portion is in close contact with the attachment object at the contact surface, and further, the flange portion has a front A passage penetrating in the axial direction is formed, and the bottomed hole passes through the passage formed in the flange portion from the opening formed in the contact surface, and the contact surface sandwiching the flange portion. It is good also as a structure extended to the position used as the other side.

  If such a configuration is adopted, unlike the case where only the bottomed hole that functions as an air spring is formed, a part of the elastomer material around the bottomed hole penetrates the flange portion in the axial direction. By being restrained by the passage, expansion deformation of the bottomed hole is suppressed in a part of the bottomed hole, so that the spring characteristic of the bottomed hole can be adjusted.

  Further, when the flange portion as described above is provided, the flange portion may be configured as described in claim 9, that is, the flange portion is formed with a communication hole penetrating in the axial direction, and the elastomer portion. It is preferable that the portions on both sides in the axial direction of the flange portion are formed as an integrally molded product in which both the outer periphery of the flange portion and the communication hole are continuous.

  With such a structure, the portions of the elastomer portion on both sides in the axial direction of the flange portion are continuous via both the outer periphery of the flange portion and the communication hole, so that the flange portion is detached from the elastomer portion or the flange portion It is possible to suppress or prevent the position from being shifted relative to the elastomer portion.

It is a figure which shows the vibration isolator of 1st Embodiment, (a) is a perspective view of an external appearance, (b) is a perspective view which shows an internal structure, (c) is a perspective view which represented a part in the longitudinal cross-section. It is a figure which shows the vibration isolator of 1st Embodiment, (a) is the top view, (b) is the front view, (c) is the right view, (d) is the sectional view on the AA line. , (E) is a front view showing the internal structure. It is a figure which shows the 1st fixing | fixed part of 1st Embodiment, (a) is the top view, (b) is the front view, (c) is the right view, (d) is the bottom view. The longitudinal cross-sectional view which shows the use condition of the vibration isolator of 1st Embodiment. (A)-(c) is a longitudinal cross-sectional view which shows the example which changed the magnitude | size of the cavity, respectively. It is a figure which shows the vibration isolating component of 2nd Embodiment, (a) is the top view, (b) is the front view, (c) is the right view, (d) is the BB sectional drawing. . It is a figure which shows the vibration isolating component of 3rd Embodiment, (a) is the top view, (b) is the front view, (c) is the right view, (d) is the CC sectional view taken on the line. . It is a figure which shows the vibration isolator of 4th Embodiment, (a) is the top view, (b) is the front view, (c) is the right view, (d) is the DD sectional view taken on the line. . It is a figure which shows the vibration isolator of 5th Embodiment, (a) is a longitudinal cross-sectional view which shows the state before receiving a compressive load, (b) is a longitudinal cross-sectional view which shows the state after receiving a compressive load.

Next, embodiments of the present invention will be described with some specific examples.
[First Embodiment]
The anti-vibration component 1 is a component that suppresses vibration from being transmitted from one member to the other member between the two members by being interposed between the two members. As shown in FIG. 2C and FIGS. 2A to 2E, the first fixing portion 3A, the second fixing portion 3B, the spring portion 5, and the elastomer portion 7 are provided.

  Among these, the first fixing portion 3A and the second fixing portion 3B are formed of hard plastic (for example, polypropylene resin (PP), polyacetal resin (POM), polyamide resin (PA), etc.).

  As shown in FIGS. 3A to 3D, the first fixed portion 3A has a cylindrical portion 11 on the upper end side. The cylindrical portion 11 includes the cylindrical portion 11 shown in FIGS. ) And the like, the spring portion 5 is externally fitted. Further, a through hole 13 that penetrates the first fixed portion 3A from the upper end side to the lower end side is formed, and a part of the through hole 13 serves as a lumen of the cylindrical portion 11.

  In addition, a pair of check protrusions 15 are formed on the lower end side of the first fixing portion 3A from the periphery of the opening at the lower end of the through hole 13 toward the lower side in the axial direction. The check protrusion 15 is a member including a support 15A and an elastic check piece 15B provided at the tip of the support 15A. As shown in FIG. 4, one of the plate-like portions P1 of the device to be attached is provided. The mounting hole H1 penetrating from one surface S1 to the other surface S2 is inserted from one surface S1.

  When the check protrusion 15 is inserted into the attachment hole H1, the check protrusion 15 passes through the attachment hole H1 in a state in which the elastic check piece 15B at the tip is elastically deformed in a direction approaching the column 15A. After passing through the mounting hole H1, the elastic check piece 15B expands and engages the other surface S2. As a result, the check protrusion 15 cannot be pulled out from the attachment hole H1.

  In the first fixing portion 3 </ b> A, a flange portion 17 is formed at a position above the check protrusion 15 and below the cylinder portion 11. As shown in FIGS. 1 (c) and 2 (d), the flange portion 17 is a portion that is buried in the elastomer portion 7. As a result, the first fixing portion 3 </ b> A becomes the elastomer portion 7. It has a structure that cannot be easily removed.

  In addition, the flange portion 17 is formed with six communication holes 19A to 19F that penetrate the flange portion 17 from the upper surface side to the lower surface side and communicate the region on the upper surface side with the region on the lower surface side. The portion 7 is an integrally molded product in which the portion on the upper surface side and the portion on the lower surface side of the flange portion 17 are continuous through both the communication holes 19 </ b> A to 19 </ b> F and the outer periphery of the flange portion 17.

  Thereby, a part of the elastomer part 7 existing in the communication holes 19 </ b> A to 19 </ b> F functions to prevent the flange part 17 from coming off from the elastomer part 7. It functions to prevent relative rotation.

  As shown in FIGS. 2 (a) to 2 (e), the second fixing portion 3B is shaped upside down with respect to the first fixing portion 3A. It is a molded product having exactly the same shape as the one fixed portion 3A, and the function of each part provided in the second fixed portion 3B is exactly the same as that of the first fixed portion 3A. Therefore, in the drawing, the same reference numerals are given to the equivalent portions of the first fixing portion 3A and the second fixing portion 3B, and the detailed description thereof is omitted.

  The spring part 5 is constituted by a coil spring. As described above, the first fixing portion 3A and the second fixing portion 3B are attached to both ends of the spring portion 5 in the axial direction. Further, the spring portion 5 is entirely buried in the elastomer portion 7.

  The elastomer part 7 is formed of a vibration-damping styrene-based elastomer, and such a styrene-based elastomer has a loss coefficient of 0.3 or more and a hardness of about 10 to 40 according to JIS A. It's being used.

  Moreover, as already demonstrated, although the 1st fixing | fixed part 3A, the 2nd fixing | fixed part 3B, and the spring part 5 are in the state embedded in part or all inside the elastomer part 7, it is set as such a structure. Therefore, the elastomer part 7 arrange | positions the 1st fixing | fixed part 3A, the 2nd fixing | fixed part 3B, and the spring part 5 in a metal mold | die, and injects the thermoplastic resin composition used as the elastomer part 7 in the metal mold | die. Is formed by.

  Further, a cavity 21 communicating with the through hole 13 of the first fixing part 3A and the second fixing part 3B is formed inside the elastomer part 7, and a constriction is formed on the outer peripheral side of the part where the cavity 21 is formed. A portion 23 is formed.

  By forming such a cavity 21 and a constricted portion 23, the vicinity of the central portion in the axial direction of the elastomer portion 7 has a structure with low rigidity that is very easily deformed. When transmitted, the vibration can be damped by the spring part 5 and the elastomer part 7 expanding, contracting, bending, and twisting in the vicinity of the central part having low rigidity.

  Moreover, the surface in the axial direction both ends of the elastomer part 7 has a part area | region protruding slightly in the axial direction rather than another area | region, and this protrusion area | region becomes the contact | adherence surface 25 closely_contact | adhered with respect to attachment object. ing. A part of the elastomer portion 7 forming the contact surface 25 is compressed by being sandwiched between the attachment target and the flange portion 17 when the first fixing portion 3A and the second fixing portion 3B are fixed to the attachment target. Thereby, it is made to closely_contact | adhere with a strong contact pressure to attachment object, and it suppresses thru | or prevents that rattling generate | occur | produces between attachment object and each fixing | fixed part.

  Further, the elastomer portion 7 is formed with a bottomed hole 27 that opens to the contact surface 25 described above. The bottomed hole 27 serves to make the elastomer portion 7 a structure having a lower rigidity and is easily deformed, and when the contact surface 25 is closely attached to an attachment target, the bottomed hole 27 is sealed in a state where air is contained. The bottomed hole 27 also functions as an air spring.

  Moreover, the bottomed hole 27 extends to a position vertically penetrating the flange portion 17 with the communication holes 19B and 19E formed in the flange portion 17 as a passage. Therefore, despite the presence of the flange portion 17, the volume can be sufficiently secured as compared with the bottomed hole formed on one side of the flange portion 17, and the rigidity of the elastomer portion 7 can be reduced, or as an air spring Can be improved. Further, when the bottomed hole 27 is passed through such a passage (communication holes 19B and 19E), the bottomed hole 27 is restrained at that portion and does not expand in the radial direction. The characteristics have been improved.

  According to the anti-vibration component 1 configured as described above, as shown in FIG. 4, the first fixing portion 3A is fixed to the plate-like portion P1 of the first member, and the second fixing portion 3B. Is fixed to the plate-like part P2 of the second member, so that the vibration isolator 1 is interposed between the plate-like part P1 of the first member and the plate-like part P2 of the second member. Can be disguised.

  In this state, either one of the first member and the second member vibrates and is fixed to the one member (= first fixing portion 3A or second fixing portion 3B). Even if the vibration is transmitted to the spring portion 5 and the elastomer portion 7, the spring portion 5 and the elastomer portion 7 are elastically deformed to relieve or absorb the vibration.

  In particular, in the elastomer part 7, as the elastomer part 7 is deformed, the vibration is attenuated by the viscoelasticity of the deformed part. In addition, when the spring portion 5 is elastically deformed, the spring portion 5 tries to return to its original shape by higher elasticity than the elastomer portion 7, so that the elastomer portion 7 also returns to its original shape following such a spring portion 5. At this time, the vibration is attenuated by the viscoelasticity of the portion that returns to the original shape. That is, since both the spring part 5 and the elastomer part 7 exist, the spring part 5 and the elastomer part 7 can cooperate and can attenuate a vibration effectively.

  Further, the gap between the first fixed portion 3A and the second fixed portion 3B can be properly maintained by the elasticity of the spring portion 5. Therefore, for the elastomer portion 7, there is no problem even if a relatively soft elastomer material is selected, and an elastomer material having excellent vibration damping characteristics can be arbitrarily adopted, thereby improving the vibration damping characteristics of the vibration-proof component 1. be able to. Also, with such an elastomer portion 7, unlike the conventional product having a structure in which a viscous fluid is sealed, there is no need to perform the sealing operation of the viscous fluid at the time of manufacture, and there is no fear of the viscous fluid leaking out during use.

  Furthermore, a through hole 13 reaching the elastomer portion 7 is formed in the first fixing portion 3A and the second fixing portion 3B. Therefore, if such a through hole 13 is formed, when the elastomer portion 7 is formed, the core material (for example, a slider that can advance and retreat in the mold) is passed through the through hole 13 and the core material is passed through the elastomer portion. 7 is made to reach the inside region, and after the elastomer portion 7 is molded by injection molding or the like in that state, the core material is removed from the through hole 13 (for example, before being released when the slider is used). The cavity 21 can be formed inside the elastomer portion 7 by removing. If such a cavity 21 is formed in the elastomer portion 7, the elastomer portion 7 can be deformed more flexibly, and vibration damping characteristics can be improved.

  1 to 4, the cavity 21 penetrating the elastomer portion 7 is shown. As shown in FIGS. 5A to 5C, the cavity 21 is not hollow 21A. It may be ~ 21C. In particular, if the cavities 21A to 21C are not penetrated, the rigidity of the elastomer portion 7 is changed by changing the axial length thereof as shown in FIGS. 5 (a) to 5 (c). Thereby, the vibration damping characteristic of the vibration-proof component 1 can be adjusted.

  It should be noted that such a cavity 21 may not be provided in the elastomer portion 7, or a structure in which a part of the elastomer portion 7 enters the through hole 13 may be employed. Even if such a structural change is made, a change occurs in the rigidity of the elastomer portion 7, so that the vibration damping characteristics of the vibration-proof component 1 can be adjusted.

  That is, even if the parts constituting the first fixing part 3A, the second fixing part 3B and the spring part 5 and the mold necessary for molding the elastomer part 7 are the same, they are inserted into the through holes 13. The vibration damping characteristics of the vibration-proof component 1 can be adjusted by changing the rigidity of the elastomer portion 7 in multiple steps or steplessly only by adjusting the insertion amount of the core material.

[Second Embodiment]
Next, a second embodiment will be described. The second and subsequent embodiments will be described in detail with a focus on differences from the first embodiment, and common portions will be denoted by the same reference numerals as those in the first embodiment, and detailed description thereof will be omitted. .

  The anti-vibration component 31 exemplified as the second embodiment is that the spring portion 35 is a coil spring having a larger diameter than that of the first embodiment, as shown in FIGS. And it is different from 1st Embodiment by the point in which a part of the spring part 35 is exposed to the outer periphery of the constriction part 23 of the elastomer part 7. FIG. The other points are almost the same as in the first embodiment.

  If it is the vibration isolating component 31 of such a structure, since the characteristic of the spring part 35 can be changed with 1st Embodiment, compared with 1st Embodiment, the vibration damping property as the whole vibration isolating component 31 is improved. Also makes a difference. Therefore, depending on the application, the structure as in the second embodiment may be employed. Even in this case, the rigidity of the elastomer portion 7 is changed in multiple steps or steplessly using the through holes 13 to prevent the structure. The vibration attenuation characteristics of the vibration component 1 can be adjusted.

[Third Embodiment]
Next, a third embodiment will be described.
As shown in FIG. 7A to FIG. 7D, the vibration-proof component 41 exemplified as the third embodiment is that the spring portion 45 is a coil spring having a smaller diameter than that of the first embodiment. And the spring part 45 is different from 1st Embodiment by the point accommodated in the cavity 21 of the elastomer part 7. FIG. The other points are almost the same as in the first embodiment.

  If it is the vibration isolating component 41 of such a structure, since the characteristic of the spring part 45 can be changed with 1st Embodiment, compared with 1st Embodiment, it becomes the vibration suppression property as the vibration isolating component 41 whole. Also makes a difference. Therefore, depending on the application, the structure as in the third embodiment may be adopted. Even in this case, the rigidity of the elastomer portion 7 is changed in multiple steps or steplessly using the through holes 13 to prevent the structure. The vibration attenuation characteristics of the vibration component 1 can be adjusted.

[Fourth Embodiment]
Next, a fourth embodiment will be described.
As shown in FIGS. 8A to 8D, the vibration-proof component 51 exemplified as the fourth embodiment is a specific form of the check protrusion 65 provided in the first fixing portion 53A and the second fixing portion 53B. However, this is different from the first embodiment. The other points are almost the same as in the first embodiment.

  That is, in the first embodiment, the elastic check piece 15B is elastically deformed, but in the fourth embodiment, the pair of check protrusions 65 are inserted into the mounting holes by narrowing the distance between them. When the insertion is completed, the distance between the pair of check protrusions 65 is increased, and the check protrusion 65 is prevented from being removed from the mounting hole.

  Even with the vibration-proof component 51 having such a structure, the performance as the vibration-proof component 51 is almost the same as that of the first embodiment. Even in this case, the rigidity of the elastomer portion 7 is increased by using the through holes 13. The vibration damping characteristics of the vibration-proof component 1 can be adjusted by changing from step to step.

[Fifth Embodiment]
Next, a fifth embodiment will be described.
As shown in FIG. 9A and FIG. 9B, the vibration-proof component 71 exemplified as the fifth embodiment is such that a convex portion 73 is formed on the inner wall of the cavity 21 provided in the elastomer portion 7. This is different from the first embodiment. The other points are almost the same as in the first embodiment.

  In the case of the anti-vibration component 71 having such a structure, when the anti-vibration component 71 receives an excessive force and compressively deforms in the axial direction as shown in FIG. They abut. Therefore, a change occurs in the resistance to compression deformation before and after the protrusions 73 come into contact with each other, and a difference in characteristics occurs in the vibration damping performance of the entire vibration-proof component 71 as compared with the first embodiment. Therefore, depending on the application, the structure as in the fifth embodiment may be adopted.

[Modifications, etc.]
As mentioned above, although embodiment of this invention was described, this invention is not limited to said specific one Embodiment, In addition, it can implement with a various form.

  For example, in the above-described embodiment, a specific specific shape is exemplified for the fixing structure provided in the first fixing portion 3A and the second fixing portion 3B. However, there are various known structures for such a snap mechanism for the plate material. Therefore, such a structure may be adopted. However, in the present invention, an important feature is that the through holes 13 are formed in the first fixing portion 3A and the second fixing portion 3B, and thereby the size of the cavity 21 formed in the elastomer portion 7 can be adjusted. Therefore, it is important to have a structure in which such a through hole can be provided.

  In the above-described embodiment, an example in which the bottomed hole 27 is provided has been described. However, even if the bottomed hole 27 is not provided, the characteristics of the vibration-proof component provided with the bottomed hole 27 are changed. Can do.

  1, 31, 41, 51, 71... Antivibration parts, 3 A, 53 A... First fixing part, 3 B, 53 B... Second fixing part, 5, 35, 45. ... Elastomer part, 11 ... Cylinder part, 13 ... Through hole, 15, 65 ... Check protrusion, 15A ... Stand, 15B ... Elastic check piece, 17 ... Flange Part, 19A-19F ... communication hole, 21, 21A-21C ... cavity, 23 ... constriction part, 25 ... adhesion surface, 27 ... bottomed hole, 73 ... convex part.

Claims (9)

By being interposed between the first member and the second member, vibration is transmitted from one member to the other member between the first member and the second member. Anti-vibration parts to suppress,
With the first member as an attachment target, a first fixing part fixed to the attachment target;
With the second member as the attachment target, a second fixing portion fixed to the attachment target;
The first fixing portion is attached to one end in the axial direction, and the second fixing portion is attached to the other end in the axial direction, and one of the first member and the second member The first fixed portion and the second fixed portion are elastically deformed when the first fixed portion and the second fixed portion are relatively displaced with each other, and the restoring force generated along with the elastic deformation causes the first fixed portion and the first fixed portion to be elastically deformed. A spring portion that urges the two fixed portions in a direction to return the original positional relationship;
It is formed of an elastomer material having vibration damping properties, and at least a part thereof is interposed between the first fixing portion and the second fixing portion, and the first member and the second member Among them, an elastomer that elastically deforms when the first fixed portion and the second fixed portion are relatively displaced as one of the members vibrates, and attenuates the vibration by viscoelasticity of the elastically deformed portion. The department and
Among the first fixing portion and the second fixing portion, at least one fixing portion is formed with a through hole that penetrates the one fixing portion in the axial direction and reaches the elastomer portion. Anti-vibration parts featured. The vibration-proof component according to claim 1, wherein a cavity communicating with the through hole formed in the at least one fixing portion is formed in the elastomer portion. The vibration-proof component according to claim 2, wherein the cavity formed in the elastomer portion penetrates the elastomer portion in the axial direction. The at least one fixing portion has a pair of check protrusions protruding in the axial direction from the periphery of the opening at one end of the through hole,
The pair of check protrusions are inserted from the one surface into an attachment hole that penetrates the plate-like portion of the attachment target from one surface to the other surface, and in this state, in an elastically deformed state The portion that has passed through the mounting hole and has been elastically deformed after passing through the mounting hole is expanded and engaged with the other surface, so that it cannot be pulled out from the mounting hole. The anti-vibration component according to any one of claims 1 to 3, wherein the anti-vibration component is fixed to an object. The said elastomer part has a contact | adherence surface closely_contact | adhered with respect to the said attachment object, when said at least one fixing | fixed part is fixed with respect to the said attachment object. The anti-vibration component according to claim 1. It has a bottomed hole in which an opening is formed in the close contact surface, and when the close contact surface is in close contact with the attachment target, the opening is closed by the attachment target, thereby sealing the bottomed hole. The vibration-proof component according to claim 5. The at least one fixing portion has a flange portion in which the axial direction is a thickness direction, and the flange portion is held by the elastomer portion from both sides in the axial direction, whereby the at least one fixing portion is It is fixed to the elastomer part,
When the at least one fixing portion is fixed to the attachment target, a part of the elastomer portion is sandwiched between the attachment target and the flange portion, so that the elastomer portion becomes the attachment target. The vibration-proof component according to claim 5, wherein the vibration-proof component is in close contact with the contact surface. It has a bottomed hole in which an opening is formed in the close contact surface, and when the close contact surface is in close contact with the attachment target, the opening is closed by the attachment target, thereby sealing the bottomed hole. ,
In addition, the at least one fixing portion has a flange portion in which the axial direction is a thickness direction, and the flange portion is held by the elastomer portion from both sides in the axial direction, thereby the at least one fixing portion. Is fixed to the elastomer part,
When the at least one fixing portion is fixed to the attachment target, a part of the elastomer portion is sandwiched between the attachment target and the flange portion, so that the elastomer portion becomes the attachment target. In close contact with the contact surface,
Further, the flange portion is formed with a passage penetrating in the axial direction, and the bottomed hole passes through the passage formed in the flange portion from the opening formed in the contact surface, and the flange portion The anti-vibration component according to claim 5, wherein the anti-vibration component extends to a position opposite to the contact surface across the portion. The flange portion is formed with a communication hole penetrating in the axial direction.
The said elastomer part is made into the integrally molded product which the part which exists in the axial direction both sides of the said flange part continues via both the outer periphery of the said flange part and the said communicating hole. 8. The vibration-proof component according to 8.

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