JP2013053701A - Viscous fluid seal damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damper capable of exerting a stable support force for a driving device provided with a rotor as a driving mechanism and an excellent vibration damping property.SOLUTION: The viscous fluid seal damper 1 supports the self-weight of the driving device by a thick cylindrical support 8, and smoothly perform the lateral displacement of the driving device by a sliding material 10 provided at the upper end of the thick cylindrical support 8 and in the connection part 7d of a bellows 7. The lateral displacement is attenuated by the elastic deformation of the bellows 7 and the agitation resistance of a viscous fluid 3 caused by the deformation. By adopting such a vibration prevention mechanism, high vibration damping performance which has been impossible by conventional vibration prevention rubber is exerted.

Description

  The present invention relates to a viscous fluid-filled damper suitable for vibration damping of a driving device, particularly a driving device that generates vibration by driving a rotating body such as an engine, a motor, a generator, and a compressor.

  In a drive device having a rotating body as a driving mechanism such as an engine, a motor, a generator, a compressor, and the like, a vibration source becomes a vibration source by repeating the driving cycle of rotating body rotation start, operation (continuous rotation), and rotation stop. Therefore, there is a high need for vibration countermeasures and soundproofing measures. As an example, Patent Document 1 discloses an example in which a drive device (cooling fan) is supported in an anti-vibration manner by a washer-like anti-vibration rubber obtained by molding a rubber material. Further, Patent Document 2 shows an example in which a drive device (compressor) is supported in a vibration-proof manner with a buffer rubber.

Japanese Patent Laid-Open No. 9-270975 Japanese Patent Laid-Open No. 10-238928

  However, such conventional anti-vibration rubbers do not always exhibit sufficient anti-vibration performance. That is, in a drive device that includes a rotating body as the drive mechanism as described above, vibrations according to the rotational speed of the rotating body are generated. When doing so, a large displacement occurs in the lateral direction (in the radial direction of rotation). In order to effectively attenuate the lateral displacement of such a drive device, in the case of a vibration-proof rubber obtained by molding a conventional rubber material, it is effective to reduce the hardness of the vibration-proof rubber itself. There is a possibility that the supporting force for supporting the own weight is reduced, and the mounting state of the driving device becomes unstable due to the tendency to be distorted. Thus, in order to obtain a stable mounting state without reducing the supporting force while improving the vibration isolation performance for the driving device including the rotating body as the driving mechanism, it is necessary to drastically review the structure of the damper.

  The present invention has been made against the background of the prior art as described above. The object is to provide a new damper capable of exhibiting a stable supporting force and an excellent vibration damping property for a driving device having a rotating body as a driving mechanism.

  The present invention for achieving the above object is configured as follows.

(1) The present invention includes a hollow hermetic container and a viscous fluid filled in the hermetic container, and includes an annular mounting portion of the driving device that generates vibration and laterally displaces and a support that supports the driving device. For a viscous fluid-filled damper that is attached between and supports the drive device in an anti-vibration manner, the sealed container is a cylinder made of a thick rubber-like elastic body on which the annular attachment portion is placed and elastically supports the own weight of the drive device A cylindrical support portion, a bellows portion made of a thin-film rubber-like elastic body that is elastically deformed in response to the annular mounting portion that is provided on the inner side of the cylindrical support portion, and the annular mounting portion that is laterally displaced It is characterized by comprising a sliding material that comes into contact with and increases the slipperiness.

The sealed container includes a cylindrical support portion made of a thick rubber-like elastic body on which the annular mounting portion is placed and elastically supports the own weight of the driving device. For this reason, even if a drive device is a heavy article, it can support reliably. Further, not only the support of the own weight but also the vibration in the vertical direction generated in the driving cycle of the driving device can be attenuated.
The sealed container includes a bellows portion made of a thin-film rubber-like elastic body that is provided inside the cylindrical support portion and receives the annular mounting portion that is laterally displaced and elastically deforms. For this reason, vibration and impact due to lateral displacement generated in the driving cycle of the driving device can be buffered and attenuated by the thin bellows portion.
The sealed container includes a sliding material that comes into contact with the annular mounting portion that is laterally displaced to enhance slipperiness. In this way, by making the lateral displacement of the annular mounting portion of the driving device, which is a heavy load, easy due to the lubricant, the annular mounting portion can be smoothly abutted against the bellows portion, and vibrations and impacts of the driving device can be further effectively prevented. Can be attenuated.

(2) In the present invention, an external protrusion is provided on the outer peripheral surface of the bellows portion so as to protrude and closely contact the annular mounting portion.
It is preferable that the annular mounting portion of the driving device is always in contact with the bellows portion rather than being separated from the bellows portion since the damping effect by the bellows portion and the viscous fluid can be exhibited from the start of the lateral displacement. However, it is difficult to manufacture the annular mounting portion and the bellows portion so that the annular mounting portion and the bellows portion are in exact contact with each other in consideration of processing accuracy and tolerance. Therefore, in the present invention, an external protrusion is provided on the bellows part, and it is brought into close contact with the annular mounting part, so that a close contact state is always obtained irrespective of manufacturing accuracy and tolerances in manufacturing, and an excellent vibration damping effect can be exhibited. I can do it.

(3) About the said invention, the internal protrusion which protrudes toward the inside of an airtight container is provided in the internal peripheral surface of a bellows part.
In the present invention, when the annular mounting portion of the driving device is largely laterally displaced, the internal protrusion is stretched to prevent excessive crushing deformation of the bellows portion, and to keep the internal space where the viscous fluid exists in the bellows portion. Can do. Therefore, even if the bellows portion is greatly elastically deformed, the vibration damping effect due to the stirring resistance of the viscous fluid can be exhibited.

(4) In the present invention, the lubricant can be any of resin powder, inorganic powder, resin film, viscous liquid, and gel elastic body.
According to the present invention, the lateral displacement of the drive device can be smoothly performed by a simple method using these lubricants.

  According to the viscous fluid-filled damper according to the present invention, the cylindrical support portion can exert a supporting force for the driving device. In addition, the annular mounting portion of the laterally moving drive device is received by the bellows portion, the vibration is attenuated by elastic deformation of the bellows portion and the stirring resistance of the viscous fluid, and the lateral displacement of the annular mounting portion is smoothly performed by the lubricant. Therefore, the vibration damping performance that was impossible with the conventional anti-vibration rubber can be exhibited. Therefore, the viscous fluid-filled damper according to the present invention can contribute to vibration isolation of a drive device including a rotating body as a drive mechanism.

The center longitudinal cross-sectional view of the viscous fluid enclosure damper by 1st Embodiment of this invention. FIG. 2 is a reference diagram of a use state of the viscous fluid-filled damper of FIG. 1. FIG. 2 is an explanatory diagram of the viscous fluid-filled damper in FIG. The expanded sectional view equivalent to SA section of Drawing 1 which shows other embodiments of the sliding material shown in Drawing 1. Explanatory drawing which shows other embodiment of the bellows part shown in FIG. The expanded sectional view equivalent to FIG. 1SA part which shows other embodiment of the bellows part shown in FIG. The expanded sectional view equivalent to FIG. 1SA part which shows other embodiment of the bellows part shown in FIG. The center longitudinal cross-sectional view which shows other embodiment of the viscous fluid enclosure damper of FIG.

  Hereinafter, a viscous fluid-filled damper according to an embodiment of the present invention will be described.

Configuration of viscous fluid-filled damper 1 [Fig. 1]
The viscous fluid-filled damper 1 of this embodiment is configured by sealing a viscous fluid 3 in a hollow sealed container 2, and the sealed container 2 is formed by sealing the open end of a container body 4 with a lid 5.

  The container body 4 includes a bearing portion 6, a bellows portion 7, a cylindrical support portion 8, and an annular end portion 9 from the inner peripheral side.

  In the present embodiment, the bearing portion 6 is formed of a hard resin in a bottomed cylindrical shape. A shaft hole 6a having a thread groove formed on the inner peripheral surface is formed on the central axis. A step portion 6 b is formed on the outer peripheral surface of the bearing portion 6, and an inner peripheral side end portion of the bellows portion 7 is integrally connected to the outer peripheral side thereof. The outer peripheral surface of the bearing portion 6 is formed flush with the inner peripheral surface of the bellows portion 7 in the large-diameter portion 6c below the step portion 6b, and the bellows in the small-diameter portion 6d above the step portion 6b. It is separated from the outer peripheral surface (the inner peripheral part 7a described later) of the part 7 via a gap 6e.

The bellows portion 7 is formed in a soft thin film made of a rubber-like elastic body, and has a cylindrical inner peripheral portion 7a, an annular upper surface portion 7b, a cylindrical side support portion 7c, an annular shape from the inner periphery to the outer periphery. The connecting portion 7d is formed.
As described above, the inner peripheral portion 7a is formed apart from the small diameter portion 6d of the bearing portion 6 via the gap 6e. The upper surface portion 7b is formed as an annular flat surface that bends horizontally outward from the upper end position of the inner peripheral portion 7a. The side support portion 7c is formed as a cylindrical elastic thin film that hangs downward from the outer peripheral side end portion of the upper surface portion 7b. The height of the side support portion 7c is sufficiently larger than the plate thickness of the annular mounting portion of the drive device described later. The connecting portion 7d is formed as an annular flat surface that bends horizontally outward from the lower end position of the side support portion 7c.
As described above, a gap 6e is formed between the bellows portion 7 and the bearing portion 6 of the present embodiment, and connects the lower end portion of the inner peripheral portion 7a of the bellows portion 7 and the large diameter portion 6c of the bearing portion 6. Although it has a structure, for example, there are the following advantages compared with a structure in which the upper end portion (upper surface portion 7b described later) of the bellows portion 7 and the upper end portion of the bearing portion 6 are connected.
First, since the bellows part 7 becomes long, the elastic deformation margin of the bellows part 7 with respect to the acting load is increased, and the load applied to the connecting part between the bellows part 7 and the bearing part 6 is reduced, thereby reducing the end of the bellows part 7. Can be made difficult to peel off from the bearing portion 6.
Secondly, the presence of the gap 6e allows the bellows part 7 to be deformed so that the entire bellows part 7 falls down when the annular mounting part 11b of the drive device 11 described later is pressed, improving the vibration damping performance. can do.

  The cylindrical support portion 8 is formed in a cylindrical shape to form a large-diameter outer peripheral wall of the container body 4 and is formed thick with a rubber-like elastic body. That is, it is formed with a thickness that can support the weight of the driving device without folding or excessively distorting the weight. An annular end 9 made of hard resin is integrally formed at the lower end of the cylindrical support 8. The annular end portion 9 is an open end of the container body 5 and is fixed to a lid 5 described later. In this embodiment, ultrasonic bonding is used as the fixing method.

The lid 5 is formed of a hard resin molded body, and an annular flange portion 5a, a cylindrical tubular portion 5b, and a disc-shaped upper surface portion 5c are formed from the outer periphery to the inner periphery.
The flange portion 5a is fixed to the annular end portion 9 of the container body 4 so as to seal the opening end of the container body 4 in a liquid-tight manner. In this embodiment, ultrasonic bonding is performed as the fixing method, and a bonding surface is formed at the interface between them. In addition, two attachment holes 5d for fixing the viscous fluid-filled damper 1 are formed in the flange portion 5a.
The cylindrical portion 5b is formed in a cylindrical shape, and when the lid 5 is fixed to the container body 4, it is inserted into the lower end side of the inner peripheral surface of the cylindrical support portion 8 and abuts and supports from the inside. As a result, the support force of the cylindrical support portion 8 can be increased from the inside, and the weight of the drive device can be reliably supported without excessive distortion or hip folding.

  Reference numeral 10 denotes a lubricant, which is provided so as to cover the upper end portion of the cylindrical support portion 8 and the upper surface portion of the connecting portion 7d of the bellows portion 7 in this embodiment. An annular mounting portion of a driving device, which will be described later, is placed on the cylindrical support portion 8, and the sliding portion 10 is interposed between the annular mounting portions so that the annular mounting portion smoothly faces the side support portion 7 c of the bellows portion 7. To be able to slide (described later).

The bellows part 7 and the cylindrical support part 8 of the material container main body 4 of each part of the viscous fluid-filled damper 1 are formed of a rubber-like elastic body. As the rubber-like elastic body, synthetic rubber such as butyl rubber, acrylic rubber, ethylene propylene rubber, and silicone rubber can be used. Among these, in this embodiment, butyl rubber having excellent vibration damping properties, gas permeation resistance, wear resistance and the like is used. In addition to a synthetic rubber such as butyl rubber, a thermoplastic elastomer can be used. In this case, two-color molding may be used instead of insert molding.

  The bearing 6, the annular end 9, and the lid 7 of the container body 4 are made of hard resin. Specifically, it can be formed of a thermoplastic resin such as polypropylene resin, acrylonitrile / butadiene / styrene resin or polyamide resin, or a thermosetting resin such as phenol resin or melamine resin.

  And in this embodiment, the container main body 4 is shape | molded as one component by insert molding the bearing part 6, the bellows part 7, and the cyclic | annular end part 9. FIG. Further, on the outer peripheral side of the sealed container 2, a joining surface is formed in which the annular end 9 of the container body 4 and the flange 5a of the lid body 7 are firmly fixed by ultrasonic fusion.

  As the lubricant 10, a resin powder, an inorganic powder, a resin film, a viscous liquid, or a gel-like elastic body can be used. Specifically, fluororesin, polyethylene resin, silicone resin, acrylic resin or the like can be used as the material of the resin powder, and alumina, silica, boron nitride, molybdenum or the like can be used as the material of the inorganic powder. As the material of the resin film, for example, polyethylene resin, polypropylene resin, fluororesin, or the like can be used, and it is more preferable in that there is no fear of slipperiness due to falling off like the above-described resin powder and inorganic powder. As the viscous liquid, a viscous oily liquid can be used. Specifically, mineral oil oil such as paraffin oil, naphthene oil, aromatic oil, α-olefin oil, castor oil, rapeseed oil Etc., vegetable oils, silicone oils and the like can be used. As a material of the gel-like elastic body, for example, silicone gel, acrylic gel, or the like can be used.

  As the viscous fluid 3, a liquid and a liquid to which solid particles that do not react and dissolve are added are used. Among these, silicone oil and solid particles that do not react and dissolve in silicone oil can be used according to required characteristics such as heat resistance, reliability, vibration proofing characteristics, and vibration damping characteristics. As the silicone oil, dimethyl silicone oil, methylphenyl silicone oil or the like can be used. As solid particles that do not react and dissolve, silicone resin powder, polymethylsilsesquioxane powder, wet silica particles, dry silica particles, and these surface-treated products can be used alone or in combination of several types. Can also be used.

Use form of the viscous fluid-filled damper 1 (FIGS. 2 and 3)
The viscous fluid-filled damper 1 of this embodiment is used as shown in FIG. 2, for example.
Reference numeral 11 denotes a driving device. Specifically, for example, the driving device generates vibration by driving a rotating body such as an engine, a motor, a generator, a compressor, or the like. The drive device 11 generates a large lateral displacement (displacement in the horizontal direction) when the rotation start, operation (continuous rotation), and rotation stop cycles of the rotating body are switched. The vibration due to the lateral displacement is damped by the viscous fluid-filled damper 1.
For this purpose, a plate-like annular mounting portion 11b is formed to project from the housing 11a of the drive device 11, and an engagement hole 11c is formed through the plate thickness at the center thereof. In addition, although the annular attachment part 11b of this embodiment has illustrated the endless cyclic | annular thing, an endted cyclic | annular thing may be sufficient.
Then, the engaging hole 11c of the annular mounting portion 11b is engaged with the outer periphery of the side support portion 7c of the bellows portion 7 of the viscous fluid-filled damper 1, and a fixing member 12 such as a washer screw is inserted from above to obtain a bearing portion. The viscous fluid-filled damper 1 and the drive device 11 are fixed by screwing together with the six shaft holes 6a.
Also, the viscous fluid-filled damper 1 itself has a fixing member 13 such as a screw inserted into the mounting hole 5d of the lid 5 and the fixing member 13 is attached to the structural member 14 as a “support” on which the driving device 11 is installed. And fix.

Action and effect of viscous fluid-filled damper 1 [Fig. 3]
In addition to the actions and effects already described, the viscous fluid-filled damper 1 of the present embodiment can exhibit the following actions and effects.

  The cylindrical support portion 8 of the sealed container 2 of the viscous fluid-filled damper 1 is formed of a thick rubber-like elastic body. For this reason, the support force which supports the weight of the drive device 11 reliably can be exhibited. In addition to supporting the own weight, vibrations in the vertical direction generated in the driving cycle of the driving device 11 can be attenuated.

  The bellows portion 7 of the sealed container 2 is formed with a side support portion 7c that receives and elastically deforms and receives the side-displaceable driving device 11 in contact with the engagement hole 11c of the annular mounting portion 11b. Therefore, the lateral displacement caused by the vibration generated in the drive cycle of the drive device 11 can be buffered by the elastic deformation of the thin soft side support portion 7c and can be attenuated by the stirring resistance of the viscous fluid 3 by the elastic deformation ( FIG. 3 (B)).

  The hermetic container 2 includes a lubricant 10 that covers the upper end portion of the cylindrical support portion 8 and the upper surface portion of the connecting portion 7 d of the bellows portion 7. This sliding material 10 enhances the slipperiness of the annular mounting portion 11b that is laterally displaced. Thus, by reducing the sliding resistance generated between the annular mounting portion 11b and the sealed container 2 when the driving device 11 which is a heavy load is displaced laterally, the annular mounting portion 11b is smoothly supported on the side of the bellows portion 7. The vibration and impact of the drive device 11 can be attenuated more effectively by abutting against the portion 7c.

  As described above, in the viscous fluid-filled damper 1 of the present embodiment, the lateral displacement of the drive device 11 is smoothed by the lubricant 10 provided at the upper end portion of the cylindrical support portion 8 and the connecting portion 7d of the bellows portion 7, By adopting a vibration isolation mechanism that attenuates the lateral displacement by elastic deformation of the bellows part 7 and the stirring resistance of the viscous fluid 3 thereby, high vibration damping performance that was impossible with conventional vibration isolation rubber is demonstrated. can do.

Other embodiments of the detailed structure of the viscous fluid-filled damper 1 (FIGS. 4 to 8)
(1) Other embodiment of the lubricant 10 [FIG. 4]
The lubricant 10 may be configured to be provided only at the upper end portion of the cylindrical support portion 8 (FIG. 4A). Moreover, a gel-like elastic body can be used as the lubricant 10, and in this case, it is preferable to use a material having a thickness of 0.5 mm or more (FIG. 4B). Furthermore, a resin film can be used as the sliding material 10 (FIG. 4C).
In the above example, a step is formed between the upper end portion of the cylindrical support portion 8 and the connecting portion 7 d of the bellows portion 7. Since there is a step that becomes the vertical wall, the sliding member 10 is prevented from dropping out beyond the upper end of the cylindrical support 8 by sliding with the annular mounting portion 11b that is displaced laterally. It can be fastened to the connecting portion 7d having a low height. However, for example, if a resin film is used as the sliding material 10, it may be formed flush with no step as shown in FIG.

(2) Other embodiment of bellows part 7 (1) [FIG. 5]
The outer peripheral surface (side support portion 7c) of the bellows portion 7 is exemplified by a cylindrical shape having no irregularities, but as shown in FIG. 5, it has a spherical cross section toward the engagement hole 11c of the annular mounting portion 11b. It is possible to provide a bulging portion 7e as an “external protrusion” that protrudes and is in close contact with the hole edge of the engagement hole 11c over the entire circumference.
It is preferable that the annular mounting portion 11b of the driving device 11 is always in contact with the bellows portion 7 rather than being separated from the start point of the lateral displacement because the damping effect by the bellows portion 7 and the viscous fluid 3 can be exhibited. However, it is difficult to manufacture the engagement hole 11c of the annular mounting portion 11b and the side support portion 7c of the bellows portion 7 so that they are just in contact with each other without considering the size. (FIGS. 5A and 5C).
In order to eliminate the occurrence of such a gap d, a bulging portion 7e is provided in the bellows portion 7 (FIG. 5C), and the bellows portion 7 is brought into close contact with the engagement hole 11c of the annular mounting portion 11b (see FIG. 5C). FIG. 5 (B) (D)). As a result, a close contact state is always obtained regardless of processing precision and tolerances in manufacturing, and an excellent vibration damping effect can be exhibited.

(3) Another embodiment of the bellows part 7 (2) [FIG. 6]
In FIG. 5, the bulging portion 7e protruding in a spherical shape is illustrated, but the side support portion 7c may be formed as an inclined surface as shown in FIG. 6, for example. This also eliminates the occurrence of the gap d. Moreover, since the annular mounting portion 11b can be pressed from above by using the side support portion 7c as an inclined surface, it is possible to enhance the vibration damping performance in the vertical direction.

(4) Other embodiment of bellows part 7 (3) [FIG. 7]
About the bellows part 7, the internal protrusion 7f which protrudes toward the inside of the airtight container 2 can be provided in an internal peripheral surface.
In the embodiment without the internal protrusion 7f, the bellows portion 7 is greatly crushed so that the side support portion 7c comes into contact with the inner peripheral portion 7a due to the large lateral displacement of the annular mounting portion 11b of the drive device 11. It may be deformed. If it does so, the viscous fluid 3 which exhibits a damping effect will be extruded from the inside of the bellows part 7, and there exists a possibility that the damping effect in the inside of the bellows part 7 may fall.
Therefore, in the present embodiment, the internal protrusion 7f is provided, and the internal protrusion 7f stretches to prevent excessive crushing deformation of the bellows part 7 even when it is largely displaced laterally, and the internal space in which the viscous fluid 3 exists inside the bellows part 7 So that you can continue to secure. Therefore, even if the bellows portion 7 is elastically deformed due to a large lateral displacement, the vibration damping effect due to the stirring resistance of the viscous fluid 3 can be exhibited.
Such internal protrusions 7f can be formed, for example, on the inner side surface of the side support portion 7c (FIG. 7A) or provided on the inner side surface of the inner peripheral portion 7a (FIG. 7B). Further, as shown in FIG. 7C, the above-mentioned bulging portion 7e may be formed on the outer side surface of the side support portion 7c, and the inner protrusion 7f may be formed on the inner side surface. Further, as shown in FIG. 7D, the above-described bulging portion 7e may be provided on the outer side surface of the side support portion 7c, and the inner protrusion 7f may be provided on the inner peripheral portion 7a.
In addition, although the internal protrusion 7f is formed as a shape that swells in a spherical shape across the entire circumference of the inner peripheral portion 7a, other shapes may be used as long as the same functions and effects as described above can be exhibited.

(5) Other embodiment of bearing 6 [FIG. 8]
The bearing portion 6 is illustrated as having a bottom surface that is separated from the top surface portion 5c of the lid 5, but may be configured to be in contact with each other, for example, as shown in FIG. According to this configuration, the rigidity of the bearing portion 6 is increased and the fixing member can be easily attached. Further, since the viscous fluid 3 is easily sheared, the vibration suppressing effect can be enhanced.

  As described above, the viscous fluid-filled damper according to the present invention exhibits a vibration damping effect suitable for a drive device including a rotating body as a drive mechanism such as an engine, a motor, a generator, a compressor, etc. It can be applied to a device provided with a driving device.

DESCRIPTION OF SYMBOLS 1 Viscous fluid enclosure damper 2 Airtight container 3 Viscous fluid 4 Container body 5 Lid 5a Flange part 5b Cylindrical part 5c Upper surface part 5d Mounting hole 6 Bearing part 6a Shaft hole 6b Step part 6c Large diameter part 6d Small diameter part 6e Clearance 7 Bellows Part 7a Inner peripheral part 7b Upper surface part 7c Side support part 7d Connection part 7e Protruding part (external protrusion)
7f Internal projection 8 Cylindrical support portion 9 Annular end portion 10 Lubricant 11 Drive device 11a Housing 11b Annular attachment portion 11c Engagement holes 12, 13 Fixing member 14 Structural member (support)

Claims (4)

A hollow sealed container;
A viscous fluid filled in a sealed container,
In a viscous fluid-filled damper that is attached between an annular mounting portion of a drive device that generates vibration and is displaced laterally and a support body that supports the drive device, and supports the drive device in a vibration-proof manner,
The sealed container is
A cylindrical support portion made of a thick rubber-like elastic body on which the annular mounting portion is placed and elastically supports the own weight of the driving device;
A bellows part made of a thin-film rubber-like elastic body that is elastically deformed by receiving the annular mounting part that is provided inside the cylindrical support part and that is displaced laterally;
A viscous fluid-filled damper, comprising: a sliding material that comes into contact with the annular mounting portion that is laterally displaced to increase slipperiness. The viscous fluid-filled damper according to claim 1, wherein an outer protrusion is provided on the outer peripheral surface of the bellows portion so as to protrude toward and close to the annular mounting portion. The viscous fluid-filled damper according to claim 1 or 2, wherein an inner protrusion protruding toward the inside of the sealed container is provided on an inner peripheral surface of the bellows part. The viscous fluid-filled damper according to any one of claims 1 to 4, wherein the lubricant is any one of a resin powder, an inorganic powder, a resin film, a viscous liquid, and a gel-like elastic body.

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