JP2012077776A - Vibration isolation damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration isolation damper excellent in mounting easiness which can mount screw fastening or the like only with a simple tool such as a screwdriver without applying special processing to a support or a body to be supported.SOLUTION: The vibration isolation damper 11 includes a stirring cylindrical part 12 having a mounting part 14 mounted on one of the support on one side and the body to be supported and the cylindrical side fitting part 15 exposed inside a sealed container on the other side, and a cover body 13 having a cover side fitting part 16 and mounted the other of the support and the body to be supported, and a flexible part 3 located between the stirring cylindrical part 12 and the cover body 13 and formed of a flexible and deformable rubber-like elastic body. The cylindrical side fitting part 15 and the cover side fitting part 16 are fitted by elastic deformation of the flexible part 3 thereby enabling rotation of the stirring cylindrical part 12 to be prevented when the mounting part 14 is secured to the support or the body to be supported.

Description

  The present invention relates to a disk-like recording such as a hard disk drive (HDD), a digital versatile disk (DVD), a compact disk (CD), etc. used for in-vehicle and consumer audio equipment, video equipment, information equipment, various precision equipment, etc. The present invention relates to a vibration isolating damper that attenuates vibrations of a vibration isolating object such as a disk device that reproduces a medium (hereinafter also referred to as a “disk”), an in-vehicle electronic control unit, and a circuit board.

A disk device such as a mechanical chassis configured with a motor and a disk table is attached to a housing containing the disk device with a coil spring such as an anti-vibration damper or a suspension spring to support the vibration of the mechanical chassis. In addition, playback errors due to internal and external vibrations are prevented.
This anti-vibration damper is generally a viscous fluid-filled damper in which a viscous fluid such as silicone oil is sealed inside a sealed container, and the sealed container has a cylindrical peripheral wall portion made of a hard thermoplastic resin. The one end side is a flexible part made of a rubber-like elastic body, and the other end side is fixed to the lid. Further, on the opposite side of the flexible portion that is fixed to the peripheral wall portion, a stirring cylinder portion that protrudes toward the inside of the sealed container is formed.

  To install this viscous fluid-filled damper, a mounting shaft that protrudes from either a support body such as a housing or a support body such as a mechanical chassis is inserted into the stirring cylinder, and either the support body or the support body is inserted. The other is fixed to the lid. However, if the mounting shaft is not securely inserted into the stirring tube portion, the mounting shaft is likely to come off from the stirring tube portion when vibration is applied. And once removed, the damping effect of the viscous fluid-filled damper cannot be obtained, and the mounting shaft may come into contact with the flexible part and break the flexible part. For this reason, it is necessary to securely attach the agitation cylinder portion to the attachment shaft. However, the mounting of the stirring tube portion to the mounting shaft is performed manually by an operator, and the degree of mounting is determined based on the touch, so that it is not necessarily said that the mounting is surely performed.

In order to solve such a problem, for example, in the invention described in Japanese Patent Application Laid-Open No. 2007-71285 (Patent Document 1), as shown in FIG. 13, the fastening portion 36 integrated with the shaft body 32 corresponding to the stirring tube portion is provided. It is made of hard resin and has a thread groove. This fastening portion is inserted into an insertion hole 48 provided in the supported member 12 and fixed with a fastening screw 50. This eliminates the need for a mounting shaft, as well as ensuring that the supported member and the viscous fluid-filled damper are fixed, and the problem that the shaft body 32 comes off can be solved.
However, when trying to fix the fastening screw by screwing it into the fastening portion, there arises a new problem that the viscous fluid-filled damper rotates together with the screw. Therefore, as shown in FIG. 14, the front end of the fastening portion 36 has a hexagonal shape, and the supported member is provided with a substantially identical hexagonal insertion hole to prevent rotation.

JP 2007-71285 A

However, when the tip of the fastening portion is processed into a hexagon to prevent rotation, the insertion hole provided in the supported member needs to be processed into a hexagon according to this. However, the position and shape of the insertion hole on the supported member side are often determined in advance, and it is difficult to change the design at present. In addition, when the design is changed, the specifications of both the viscous fluid-filled damper and the supported member are changed, so that the burden on the design change is large.
Also, if the insertion hole on the supported member side is the same as before, hold the screwdriver with one hand when tightening the viscous fluid-filled damper in one hand, and insert the tip of the fastening part into the hexagonal part. Since it is necessary to have a tool (spanner) to prevent the fastening part from rotating in the other hand, the assembly operator will use the tool with both hands, which reduces the efficiency of screw tightening work. there were.
Accordingly, the present invention provides a viscous fluid sealed that is easy to mount and can be screwed with only a simple tool such as a screwdriver without special processing of the support or support such as a mechanical chassis. The purpose is to provide a damper.

In order to achieve the above object, the following configuration is provided.
That is, with respect to the vibration isolating damper that damps the vibration of the supported body by attaching the sealed container to both the support body and the supported body that is the object of vibration isolation, the sealed container is disposed on one side of the support body or the supported body. A stirring cylinder part having a cylinder side fitting part exposed to the inside of the sealed container on the other side with an attachment part to be attached to either side, and a support body or the above supported body having a lid side fitting part And a flexible part made of a rubber-like elastic body which is located between the stirring cylinder part and the cover body and can be expanded and contracted, and is fitted on the cylinder side by elastic deformation of the flexible part. A viscous fluid-filled damper comprising a fitting portion that prevents rotation of the agitating tube portion when the mounting portion is fixed to the support body or the supported body by fitting the lid portion and the lid-side fitting portion. is there.

A vibration-proof damper that damps vibrations of a supported body by attaching the sealed container to both the support body and a supported body that is a vibration-proof object, and the sealed container includes a predetermined stirring cylinder portion, a lid body, and a flexible portion. And at least. Vibration can be attenuated through expansion and contraction of the flexible portion, the inside of the sealed container can be stirred with the stirring cylinder, and the sealed container can be sealed with the lid. Moreover, the surrounding wall part connected with a flexible part may be provided, and the intensity | strength and fixed formability of an airtight container may be borne.
Since the agitation cylinder part having the cylinder side fitting part exposed to the inside of the sealed container is provided on the other side and the attachment part to be attached to either the support body or the supported body on one side, the support body or the support is provided through the attachment part. Can be joined directly to either body. Moreover, since the cylinder side fitting part was provided, it can be fitted with the lid side fitting part provided in the lid.

Since the sealed container is provided with a lid attached to either the support or the supported body, it can be directly joined to either the support or the supported body through the lid. Moreover, since it has a lid side fitting part, it can be fitted with the cylinder side fitting part provided in the stirring cylinder part.
Furthermore, since the airtight container is provided with a flexible portion made of a rubber-like elastic body that is located between the stirring tube portion and the lid and can be expanded and contracted, the airtight container can be deformed by expansion and contraction of the flexible portion. Moreover, the stirring cylinder part can be displaced to a position where it can come into contact with the lid, and the cylinder side fitting part and the lid side fitting part can be fitted.

  Since the tube side fitting portion and the lid side fitting portion are fitted by elastic deformation of the flexible portion, rotation of the stirring tube portion can be prevented when the mounting portion is fixed to the support body or the supported body. In other words, since there is a flexible part that can be expanded and contracted between the lid and the stirring cylinder part, the flexible part will be deformed even if the stirring cylinder part is screwed while supporting the lid, and a screw is not used in a normal vibration damper. The force at the time of stopping escapes and it is difficult to perform effective screwing. However, the stirring cylinder part can be supported by fitting the cylinder side fitting part and the lid side fitting part, and the force at the time of screwing does not escape and can be screwed effectively.

A fitting part can be comprised by the cylinder side fitting part provided with either one of a protrusion part or a recessed part, and the lid side fitting part provided with either the other of a protrusion part or a recessed part. Therefore, the stirring tube portion and the lid can be fitted.
Since it has a cylinder side fitting part provided with either one of the projecting part or the recessed part and a lid side fitting part provided with either the other of the projecting part or the recessed part, either the cylinder side fitting part or the lid side fitting part Can be a protrusion or a recess.
Moreover, it is good also as what has a protrusion part and a recessed part in any of a cylinder side fitting part and a lid side fitting part, and in that case, it is a lid side with respect to the protrusion part and recessed part which are cylinder side fitting parts. The fitting portion can be formed by fitting the concave portion and the protruding portion, which are fitting portions, respectively.

The fitting portion may be a vibration proof damper including the protruding portion and a connecting portion that forms a constricted portion at the base of the protruding portion.
Since the fitting portion includes the projecting portion and a connecting portion that forms a constricted portion at the base of the projecting portion, reliable screwing is performed when the anti-vibration damper is assembled to the support body or the supported body. When is completed, an excessive torque is generated and the joint portion can be cut off. Therefore, the completion of screwing can be perceived as a response.

  A fitting part can be set as the vibration isolator which equips the said protrusion part or the said recessed part with a latching | locking part. Since the fitting portion is a vibration proof damper provided with a locking portion in the protruding portion or the concave portion, the coupling in the fitting portion can be further strengthened, and when the vibration proof damper is assembled to the support body or the support body It is easy to turn the screwdriver when screwing. Moreover, when it is set as the fitting part which has a connection part, even after a connection part cut | disconnects, a protrusion part becomes difficult to remove | deviate from a recessed part, and it can prevent that a protrusion part drifts in a viscous fluid and produces a useless malfunction. .

A protruding screw portion that protrudes outward from the lid body at the back side position of the lid-side fitting portion and forms a male screw that can be screwed to the support body or the supported body can be provided.
Since there is a protruding screw part that protrudes outward from the lid at the back side position of the lid-side fitting part and forms a male screw that can be screwed to the support or supported body, the support or covered object on the lid side is provided. Bonding to either one of the supports can be performed through this protruding screw portion. And since the protruding screw part is located at the back side position of the lid side fitting part, it is supported to the lid using a tool such as a screwdriver at the same time as being attached to either the support body or the supported body to the attachment part. Attachment to either the body or the supported body can be performed. Therefore, it is easy to attach the vibration damper.
Further, the protruding screw portion can be inserted and tightened into a connection hole with a stud provided on the other of the support body or the supported body, and the vibration damper is attached to either the support body or the supported body. It can be easily assembled on the other side. In addition, since the vibration damping damper can be used instead of the stud, the supported body can be supported in a vibration-proof manner without changing the design.

The vibration-proof damper can be a viscous fluid-filled damper that encloses a viscous fluid in a sealed container and attenuates the vibration of the supported body by the viscous resistance of the viscous fluid.
Since the viscous fluid is sealed in the hermetic container, the vibration damping effect can be achieved and enhanced by the viscous resistance of the viscous fluid.

According to the vibration-damping damper of the present invention, the support or supported body can be attached by screw tightening or the like without any special processing on the support body or the supported body, and with only a simple tool such as a screwdriver. Easy assembly. And work efficiency can be improved.
In addition, the connection with the support or the supported body is ensured, and the connection with the support or the supported body is difficult.

It is sectional drawing of the viscous fluid enclosure damper of 1st Embodiment. It is a bottom view of the stirring cylinder part which the viscous fluid enclosure damper of FIG. 1 has. It is explanatory drawing which shows the process of attaching the viscous fluid enclosure damper of FIG. 1 to a mechanical chassis. It is sectional drawing of the viscous fluid enclosure damper of 2nd Embodiment. It is sectional drawing of the viscous fluid enclosure damper of 3rd Embodiment. It is an expanded sectional view which shows the fitting part which provided the latching | locking part. It is an expanded sectional view which shows another fitting part which provided the latching | locking part. FIG. 8 (A) is an enlarged cross-sectional view showing a fitting portion provided with a locking portion corresponding to each of the protrusion and the recess, and FIG. 8 (B) is an engagement corresponding to the protrusion and the recess, respectively. It is an expanded sectional view which shows another fitting part which provided the stop part. It is sectional drawing of the viscous fluid enclosure damper of a modification. FIGS. 10A and 10B are cross-sectional views showing a state in which the housing and the circuit board are fixed through different studs. It is sectional drawing which shows the state which attached the viscous fluid enclosure damper shown in FIG. 9 to the housing | casing and the circuit board. It is sectional drawing which shows the viscous fluid enclosure damper of another modification. It is sectional drawing of the conventional viscous fluid enclosure damper. It is a perspective view before attachment of the viscous fluid enclosure damper of FIG.

  The present invention will be described in more detail with reference to the drawings. In addition, about the structure which is common in each embodiment, the same code | symbol is attached | subjected and duplication description is abbreviate | omitted and duplication description is also abbreviate | omitted also about a common material, an effect | action, an effect, a manufacturing method, etc.

First Embodiment (FIGS. 1 to 3) :
As shown in FIG. 1, the vibration damping damper 11 of the present embodiment is a hermetically sealed container body composed of a stirring cylinder portion 12, a flexible portion 3, and a peripheral wall portion 4, filled with a viscous fluid 6 and sealed with a lid 13. A viscous fluid-filled damper 11 made of a container 7, and a stirrer cylinder portion 12 made of a hard material is attached to either a support body such as a casing of a device or a support body such as a mechanical chassis, The lid 13 is attached to either the support or the supported body, and is used by being assembled between the support and the supported body.
When vibration is applied to the viscous fluid-filled damper 11, the flexible portion 3 made of a rubber-like elastic body is deformed, and the viscous fluid 6 in the sealed container 7 is stirred by the stirring cylinder portion 12 to attenuate the vibration.

The configuration of the viscous fluid-filled damper 11 will be described in more detail. The stirring cylinder portion 12 has a mounting portion 14 to be attached to a support body or a supported body on one side, and the other side is exposed inside the sealed container 7. And the cylinder side fitting part 15 is provided in the front-end | tip of the other side exposed inside.
In this embodiment, the tube side fitting portion 15 is a protruding portion 15a from which the tip of the stirring tube portion 12 protrudes. When the stirring tube portion 12 is pressed toward the cover body 13, the cover side provided on the cover body 13 described later is provided. The fitting part 16 can be fitted. As shown in the bottom view of the stirring tube portion 12 in FIG. 2, the shape of the protruding portion 15a can be various shapes such as a “+” shape, a rectangular shape, a triangular shape, and a hexagonal shape.
The attachment part 14 is a part that forms a columnar recess along the cylinder axis direction of the stirring cylinder part 12, and is a part that screws the end of the support or the supported body. It is preferable to use a screwing portion that is threaded in the form of a female screw on the inner surface that is recessed for screwing. However, if a self-tapping screw is used as a fixing screw, female thread processing is unnecessary.

  The lid 13 is a part that is fixed to the container body to form the sealed container 7 and is a part to be attached to the support or the supported body. A lid side fitting portion 16 is provided at the inner center of the lid body 13, and the shape thereof is a shape that can be fitted to the cylinder side fitting portion 15, that is, a shape that is relative to the cylinder side fitting portion 15. The cross section is a concave portion 16b having a “+” shape, a rectangular shape, a triangular shape, a hexagonal shape, or the like. And the fitting part 17 is formed with the cylinder side fitting part 15 (protrusion part 15a) and the lid | cover side fitting part 16 (recessed part 16b).

The peripheral wall portion 4 is made of a hard material and bears the regularity of the container body, and one end is fixed to the lid body 13 and the other end is fixed to the flexible portion 3.
The flexible part 3 is provided between the stirring cylinder part 12 and the lid 13 and is formed of a rubber-like elastic body that can be expanded and contracted. One end thereof is directly fixed to the stirring cylinder portion 12, while the other end is fixed to the peripheral wall portion 4, and continues to the lid body 13 through the peripheral wall portion 4.

Next, the material which comprises each part is demonstrated.
A hard material such as a hard resin material or a metal material can be used for the peripheral wall portion 4, the lid body 13, and the stirring tube portion 12. Examples of the hard resin include thermoplastic resins such as polypropylene, polycarbonate, ABS, polyamide, polyacetal (POM), and PBT, and thermoplastic resins reinforced with glass fibers.
A rubber-like elastic body is used for the flexible portion 3, but it is preferable to use a rubber-like elastic body having a hardness of about 10 to 60 in JIS K 6253 type A in terms of excellent vibration damping effect due to elastic deformation. Such materials include synthetic rubbers and thermoplastic elastomers. More specific synthetic rubbers include styrene butadiene rubber, butadiene rubber, chloroprene rubber, nitrile butadiene rubber, butyl rubber, ethylene propylene rubber, urethane rubber, silicone rubber, Fluorine rubber, acrylic rubber, and the like, and more specific thermoplastic elastomers include thermoplastic elastomers such as styrene, olefin, urethane, ester, and vinyl chloride.
The viscous fluid 6 is preferably a silicone oil having excellent temperature characteristics. Moreover, a damping characteristic can be improved more by mix | blending a fine filler in silicone oil.

The peripheral wall portion 4 and the flexible portion 3, the stirring tube portion 12 and the flexible portion 3 can be formed by mold molding such as insert molding or two-color molding, and the peripheral wall portion 4 and the lid body 13 are formed by ultrasonic fusion or , And can be joined by an adhesive.
For example, if a thermoplastic resin (for example, a polypropylene resin) is used for the peripheral wall portion 4 and the stirring cylinder portion 12 and a thermoplastic elastomer (for example, a styrene thermoplastic elastomer) is used for the flexible portion 3, the two-color molding can be integrated. It can be configured as a molded body, and can be firmly fixed between the peripheral wall portion 4 and the flexible portion 3, and between the stirring tube portion 12 and the flexible portion 3, and the productivity is also improved.

Next, a method of attaching the viscous fluid-filled damper 11 to a mechanical chassis that is a supported body will be described with reference to FIG.
The mechanical chassis 1 is placed on the predetermined number of viscous fluid-filled dampers 11 arranged, and the positions of the attachment holes 1 a provided in the end portions of the mechanical chassis 1 and the attachment portions 14 of the viscous fluid-filled damper 11 are matched. Then, the fixing screw 9 is inserted into the mounting portion 14 through the mounting hole 1a. Next, the screw 9 is pushed in with a screwdriver (not shown), and the screwdriver 9 is rotated when the tube-side fitting portion 15 provided in the stirring tube portion 12 is fitted into the lid-side fitting portion 16 provided in the lid body 13. And screw it in. Thus, the mechanical chassis 1 and the viscous fluid-filled damper 11 can be fixed.
In order to assemble the viscous fluid-filled damper 11 to a support such as a housing, the viscous fluid-filled damper 11 is joined to the support by screwing it through a screw hole (not shown) provided in the lid 13. In addition, a normal fixing means such as fixing a lid body and a support body using a double-sided tape or an adhesive is selected and bonded.

Thus, when attaching the viscous fluid-filled damper 11 to a supported body or support body such as the mechanical chassis 1, a screwdriver may be used as a tool, and the screw 9 can be prevented from spinning around by using another tool such as a spanner. There is no need to do anything.
Further, the mounting hole 1a provided at the end of the mechanical chassis 1 is not specially processed such as hexagonal, and the viscous fluid-filled damper 11 is agitated to prevent rotation at the time of screwing. There is no need to perform additional processing such as making the tube part hexagonal.
Moreover, since the cylinder side fitting part 15 is made into the protrusion part 15a, it is easy to carry out the fitting operation | work with respect to the lid side fitting part 16 made into the recessed part 16b.

Second Embodiment [FIG. 4] :
A viscous fluid-filled damper 21 of this embodiment is shown in FIG.
In the viscous fluid-filled damper 21 of this embodiment, with respect to the structure of the fitting portion 27, the cylinder-side fitting portion 25 provided in the stirring cylinder portion 12 is defined as a recess 25 b, and the lid-side fitting portion 26 provided in the lid body 13 is provided. The protrusion 26a is different from the viscous fluid-filled damper 11 of the first embodiment in this respect.
That is, the fitting part 27 is formed by the cylinder side fitting part 25 provided with the recessed part 25b and the lid side fitting part 26 provided with the protruding part 26a.

The viscous fluid-filled damper 21 is provided with a cylinder-side fitting portion 25 that is a concave portion 25b at the tip of the agitating cylinder portion 12, so that when the agitating cylinder portion 12 is subjected to intense vibrations such as hitting the flexible portion 3, the protruding portion Compared to the viscous fluid-filled damper 11 of the first embodiment provided with the cylinder side fitting portion 15 formed as 15a, it is considered that damage to the flexible portion 3 can be reduced.
In particular, since the fitting portion 27 is configured inside the stirring tube portion 12, the corner on the lower end side of the stirring tube portion 12 is chamfered to reduce damage during contact with the flexible portion 3. However, it is convenient without affecting the fitting shape of the fitting portion 27.

Third Embodiment (FIG. 5) :
A viscous fluid-filled damper 31 of this embodiment is shown in FIG.
The viscous fluid-filled damper 31 of the present embodiment is the same as the viscous fluid-filled damper 11 of the first embodiment in that the tube-side fitting portion 35 provided in the stirring tube portion 12 is a protruding portion 35a. The difference is that a connecting portion 35c forming a constricted portion at the base of the portion 35a is provided.
That is, the fitting part 37 is formed by the cylinder side fitting part 35 provided with the protruding part 35a and the connecting part 35c and the lid side fitting part 36 provided with the recessed part 36b.

  In this viscous fluid-filled damper 31, the protruding portion 35 a that is the cylinder-side fitting portion 35 provided in the stirring cylinder portion 12 and the concave portion 36 b that is the lid-side fitting portion 36 provided in the lid body 13 are fitted, The support body or the support body is screwed, but at the time of the screwing, since the connecting portion 35c is formed in the tube side fitting portion 35, the screw 9 is fixed to the mounting portion 14 to fix it. When a torque sufficient to prevent the screw 9 from rotating is applied, the connecting portion 35c is broken and the protruding portion 35a is detached from the stirring cylinder portion 12. Further, the detached protruding portion 35 a is accommodated in the concave portion 36 b that is the lid-side fitting portion 36 provided in the lid body 13.

When the projecting portion 35a is detached from the stirring cylinder portion 12, the lid from the distal end of the stirring cylinder portion 12 after screw tightening to the lid 13 is determined from the distance from the distal end (projecting portion 35a) of the stirring cylinder portion 12 before screw tightening to the lid body 13. The distance to the body 13 is increased. For this reason, when the viscous fluid-filled damper 31 is deformed by vibration, the stroke of the stirring cylinder portion 12 in the cylinder axis direction can be made larger than when the protruding portion 35a is attached. As a result, excellent attenuation characteristics can be obtained.
Further, when the screw 9 is securely tightened and the screw tightening torque is increased, the connecting portion 35c is broken, but after the breakage, the screw tightening torque is suddenly reduced. Therefore, when performing assembly, the operator can confirm that the screw tightening has been properly completed by feeling a sudden difference in the screw tightening torque.
Note that the shapes of the tube-side fitting portion 35 and the lid-side fitting portion 36 can be reversed.

Example of change of embodiment (FIGS. 6 to 11) :
In the viscous fluid-filled damper 31 shown in the previous embodiment, in a state where the connecting portion 35c is cut and the protruding portion 35a is received in the recessed portion 36b, the protruding portion 35a is simply inserted into the recessed portion 36b. There exists a possibility that it may come off from the recessed part 36b and may float in the viscous fluid 6. FIG.
In order to prevent this, as shown in FIG. 6, locking portions 35d and 35d are provided on the two opposing surfaces of the rectangular parallelepiped protrusion 35a, or as shown in FIG. 36d is preferably provided. If the locking part 35d or the locking part 36d is provided, the protrusion 35a and the recess 36b can be reliably fixed.
As shown in FIG. 8A, such a locking portion may be provided with a locking portion 36e that is recessed with respect to the protruding locking portion 35d. Further, as shown in FIG. 8B, a convex shape and a concave shape may be combined.

In the viscous fluid-filled damper 31 including the fitting portion 38 provided with the locking portions 35d, 35e, 36d, and 36e, the protruding portion 35a and the recessed portion 36b are previously fitted in the final manufacturing stage, and the protruding portion It can be shipped as a viscous fluid-filled damper 41 in which 35a is fitted in the recess 36b. Accordingly, when the viscous fluid-filled damper 41 and the support body or the support body are screwed and fixed, it is not necessary to fit the protruding portion 35a and the concave portion 36b, and the screw tightening operation can be performed reliably.
If the locking portion is applied to the viscous fluid-filled dampers 11 and 21 shown in the first embodiment and the second embodiment, the stirring cylinder portion can be made more difficult to come off from the lid body when screwing. .

Like the viscous fluid-filled damper 41 shown in FIG. 9, the lid body 13 can be provided with a protruding screw portion 55.
As shown in FIGS. 10A and 10B, the housing (support) 2 of the device is often provided with a screw hole 2a for attaching the circuit board 10 through the stud 8, The viscous fluid-filled damper 41 having the protruding screw portion 55 can be attached using the screw hole 2a.
According to the viscous fluid-filled damper 41 provided with the protruding screw portion 55, as shown in FIG. 11, the viscous fluid-filled damper 41 can be used in place of the stud 8, and the circuit board 10 is supported in a vibration-proof manner. Is possible.
Thus, since the viscous fluid-filled damper 41 can be assembled using a general circuit board 10 mounting structure, there is no need to change the design of the mounting structure provided on the housing 2 or the circuit board 10. When the circuit board 10 fixed using the stud 8 has a problem due to the vibration, the viscous fluid-filled damper 41 that attenuates the vibration can be easily attached instead of the stud 8. Also, in the operation of actually attaching the viscous fluid-filled damper 41 to the screw hole 2a, the lid 13 can be fixed and held with a spanner or a box wrench by making the shape of the lid 13 hexagonal. It is.

  Like the viscous fluid-filled damper 51 shown in FIG. 12, the flexible part 3 is provided up to the tip of the stirring cylinder part 12, and the support part or the joined part with the supported body is a compression part 56 formed of a rubber-like elastic body. be able to. When the compression part 56 is provided, the compression part 56 is pressed when the viscous fluid-filled damper 51 is screwed to the support body or the supported body, so that loosening of the screw can be prevented.

The shape and structure of the sealed container 7 can be appropriately changed. For example, the structure without the peripheral wall 4 made of a hard material, or the structure in which the stirring cylinder 12 is exposed in the sealed container 7 but hardly protrudes. You can also. Further, the shape of the lid 13 and the peripheral wall portion 4 can also be a hexagonal shape or the like in a plan view.
Furthermore, the vibration damper can be formed as an air damper that encloses air without enclosing the viscous fluid 6.

  The mounting portion 14 of the stirring tube portion 12 can also be formed as a male screw that protrudes outward without being a recess. However, in the case of such a configuration, a nut is used instead of the screw 9 in assembling the support or the support, and the assembling work is performed using a spanner or the like instead of the driver.

When joining the respective parts constituting the sealed container 7, ultrasonic fusion, adhesion with an adhesive, heat fusion by integral molding, or the like can be appropriately employed according to the combination of materials.
The fitting shape of the fitting portion is not particularly limited, and it is necessary that the tube side fitting portion and the lid side fitting portion have a relative shape.

  The configuration of each part described in each of the above embodiments and modifications can be applied in combination with other embodiments and modifications as appropriate without departing from the conflicting combination and without departing from the spirit of the present invention. Such modified examples are also included in the scope of creation of the technical idea of the present invention.

1 Mechanical chassis (supported body)
DESCRIPTION OF SYMBOLS 1a Mounting hole 2 Housing | casing 2a Screw hole 3 Flexible part 4 Perimeter wall part 6 Viscous fluid 7 Airtight container 8 Stud 9 Screw 10 Circuit board 11, 21, 31, 41, 51 Viscous fluid enclosure damper (vibration isolation damper)
12 Stirring tube portion 13 Lid 14 Mounting portion 15, 25, 35 Tube side fitting portion 15a Protruding portion 25b Recessing portion 35a Protruding portion 35c Connecting portion 35d Locking portion 35e Locking portion 16, 26, 36 Cover side fitting portion 16b Recessed part 26a Protruding part 36b Recessed part 36d Locking part 36e Locking part 17, 27, 37, 38 Fitting part 55 Projecting screw part 56 Compression part R1, R2 region

Claims (6)

In an anti-vibration damper that damps the vibration of the supported body by attaching the sealed container to both the support body and the supported body that is the object of vibration isolation,
An airtight container has an agitating tube portion having a mounting portion to be attached to either the support body or the supported body on one side and a tube side fitting portion exposed to the inside of the airtight container on the other side, and a lid side fitting portion And a lid that is attached to either the support or the supported body, and a flexible portion that is located between the stirring tube portion and the lid and is made of a rubber-like elastic body that can expand and contract. And
A fitting portion that prevents rotation of the agitating tube portion when the mounting portion is fixed to the support or the supported body by fitting the tube side fitting portion and the lid side fitting portion by elastic deformation of the flexible portion. A viscous fluid-filled damper comprising:   The anti-vibration damper according to claim 1, wherein the fitting portion includes a tube-side fitting portion including any one of a protruding portion and a concave portion, and a lid-side fitting portion including either the protruding portion or the concave portion.   The anti-vibration damper according to claim 1 or 2, wherein the fitting portion includes the protruding portion and a connecting portion that forms a narrowed portion at the base of the protruding portion.   The anti-vibration damper according to any one of claims 1 to 3, wherein the fitting portion includes a locking portion in the protruding portion or the concave portion.   5. A protruding screw part that protrudes outward from the lid body at a position on the back side of the lid-side fitting part and that forms a male screw that can be screwed to the support body or the supported body. The vibration-damping damper according to item 1.   The vibration-proof damper according to any one of claims 1 to 5, wherein the vibration-proof damper is a viscous fluid-filled damper that encloses a viscous fluid in an airtight container and attenuates the vibration of the supported body by the viscous resistance of the viscous fluid.

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