JP4539402B2 - Shaft body integrated viscous fluid-filled damper and method for manufacturing the same - Google Patents

Description

The present invention relates to a viscous fluid-sealed damper in which a viscous fluid such as silicone oil is enclosed, and a method for manufacturing the same .

  In recent years, in compact precision equipment such as disc players such as CD players, AV equipment, personal computer HDD devices, video cameras, etc., compact viscous fluid-filled dampers in which viscous fluid such as silicone oil is sealed inside the container have been damped. It has come to be widely used for applications.

  For example, in a disc player such as a CD player, particularly a vehicle-mounted one, in order to prevent the vibration of the vehicle or the like from being transmitted to the main body mechanism unit of the disc player as it is and the occurrence of sound skipping, etc., conventionally, FIG. ), A viscous fluid-filled damper 206 is interposed between the main body mechanism unit (supported member) 202 of the disc player supported via the spring 200 and the support frame (support member) 204 as shown in FIG. Has been done.

  FIG. 6B shows a specific structural example of such a viscous fluid-filled damper 206 conventionally used together with an example of its mounting structure (disclosed in Patent Document 1 below). The viscous fluid-filled damper 206 is configured such that a highly viscous viscous fluid 210 such as silicone oil is sealed in a sealed container.

Here, the viscous fluid sealing damper 206 includes a cylindrical peripheral wall portion 214, a bottom portion 216 that closes one end in the axial direction of the peripheral wall portion 214, and a bottom portion 216 of the peripheral wall portion 214 that is continuous with the peripheral wall portion 214 on the other end side. A thin-walled flexible membrane 220 and a stirring portion 218 provided at the central portion of the flexible membrane 220, thereby forming a sealed container, in which the above viscous fluid is contained. 210 is enclosed.
The viscous fluid-filled damper 206 is fixed to the support frame 204 by a fixing screw 224 at the bottom 216 in a state where the peripheral wall portion 214 is fitted into a through hole 222 formed in the support frame (support member) 204. Yes.

An insertion hole 226 is formed in the agitator 218 on the inside, and the viscous fluid-sealed damper 206 is inserted into the main body mechanism by inserting a metal shaft 212 that has been caulked and fixed to the main body mechanism unit 202 in advance. The unit unit 202 is connected.
In the case of this viscous fluid-filled damper 206, when vibration is applied to the support frame 204, the stirring unit 218 and the shaft body 212 are relatively displaced inside the highly viscous viscous fluid 210, thereby causing the viscous fluid 210 to viscously flow and energy. Absorbs (vibrates) and blocks or suppresses vibration transmission from the support frame 204 to the main body mechanism unit 202.

  However, in the case of this viscous fluid-filled damper 206, when attaching (connecting) to the main body mechanism unit 202, the metal shaft body 212 is caulked and fixed to the main body mechanism unit 202 in advance, and this is stirred. The shaft 212 must be inserted against the frictional resistance of the inner surface of the insertion hole 226 because the flexible film 220 and the cylindrical stirring portion 218 are soft at that time. In doing so, there is a problem that the work is difficult, and therefore it is difficult to attach the viscous fluid-filled damper 206 to the main body mechanism unit 202, and the installation work becomes troublesome.

In order to solve such problems, conventionally, a viscous fluid-filled damper has been proposed in which a shaft body is made of a hard resin and is integrally formed in a stirring portion.
FIG. 7 shows an example (Patent Document 1 below).
In the viscous fluid-filled damper 230 shown in the figure, reference numeral 232 denotes a shaft body made of a hard resin, and most of the shaft body (embedded portion 234) is embedded in the embedded hole 236 inside the stirring portion 218 having a bottomed cylindrical shape. In an embedded state, the stirrer 218 is integrally formed by two-color molding.

The shaft body 232 has a large-diameter attachment portion 238 that protrudes outward from the stirring portion 218.
An annular mounting groove 239 is formed in the mounting portion 238, and the mounting groove 239 is fitted and fixed to the counterpart body mechanism unit unit by fitting the mounting groove 239 with the mounting hole of the counterpart mechanism unit. It has become so.
Here, the large-diameter attachment portion 238 is in a state where the lower surface in the drawing is a portion on the inner peripheral side of the flexible membrane 220 and is joined to the upper surface (outer surface) in the drawing of the inner peripheral portion 240 around the stirring portion 218 in the drawing. The agitation unit 218 is integrally formed.

FIG. 8A shows, as a comparative example, what the present inventors have devised as this kind of shaft-body-integrated viscous fluid-filled damper.
Here, a shaft 232 made of a hard resin formed integrally with the stirring portion 218 is projected outside from the stirring portion 218, and the mounting portion 241 is provided on the tip side, and the lower side in the drawing has a dimension perpendicular to the axis. A large base portion 242 is formed, and the shaft body 232 is attached and fixed to the mating body mechanism unit at the attachment portion 241.
Here, the base portion 242 is integrally formed with the stirring portion 218 in a bonded state to the upper surface (outer surface) of the inner membrane peripheral portion 244.
From the outer peripheral end of the inner membrane peripheral portion 244, a membrane cylindrical portion 246 having a cylindrical shape is formed in a falling shape.
The intersection between the inner peripheral part 244 and the cylindrical film part 246 has a curved shape (R shape) on both the inner and outer surfaces.

The viscous fluid-filled damper 254 shown in FIG. 8A is molded as shown in FIG.
In the figure, reference numeral 248 denotes a molding die having a main body portion 250 and slide dies 252 and 252 that slide in the left-right direction in the drawing.
In this molding method, the shaft body 232 is molded integrally with the peripheral wall portion 214, the flexible membrane 220, and the stirring portion 218 as shown in FIG. 9 (I), and then the mounting portion as shown in (II). Slide molds 252 and 252 for molding 241 are opened by sliding in the left-right direction in the drawing, and then the shaft body 232, the peripheral wall portion 214, the flexible film 220, and the stirring portion 218 are molded from the molding die 248 in the drawing. Demold downward.
Thereafter, a separate bottom 216 is secured to one end of the peripheral wall 214 in the axial direction and on the open side as shown in FIG. 8A to close the open part.
The viscous fluid 210 is sealed before the bottom 216 is fixed.

  However, in the case of the viscous fluid-filled damper 254 shown in FIG. 8A, the dimension B in the direction perpendicular to the axis B of the mounting portion 241 must be smaller than the dimension A in the direction perpendicular to the axis A of the base 242. The mold can not be removed later (see FIG. 9 (II))), and the mounting part 241 is inevitably small in dimension B (axis perpendicular direction dimension), and the mounting work when mounting the mounting part 241 on the other side This causes problems such as poor nature.

  Accordingly, when the dimension B of the mounting portion 241 is increased in consideration of the mounting workability, the dimension A of the base portion 242 must be increased accordingly. In this case, as shown in FIG. And the flexible membrane 220, specifically, the upper surface of the membrane inner peripheral portion 244 are joined over a wide range, and the constraining range of the flexible membrane 220 by the base 242 is widened. The flexible deformation region of the flexible film 220 is reduced, and the damping characteristic as the viscous fluid-filled damper is deteriorated.

Further, as the effective flexible length (length in the direction perpendicular to the axis) of the flexible membrane 220 is shortened, the boundary portion between the joint portion and the non-joint portion of the base 242 and the flexible membrane 220 in the shaft body 232 is further reduced. Because of the middle position in the direction perpendicular to the axis of the flexible membrane 220, stress concentration occurs at the boundary portion of the viscous fluid-filled damper 254 during the vibration isolating action, and the flexible membrane 220 is easily broken from the same portion. This causes a problem that the durability is lowered.
As a countermeasure against the breakage of the flexible film 220 due to the stress concentration, it is conceivable to increase the thickness of the flexible film 220. In this case, however, the flexible film 220 is thickened to increase the thickness of the flexible film 220. Therefore, there is a problem that the damping characteristic of the viscous fluid-filled damper is deteriorated.

JP 2003-139182 A

  The present invention is based on the circumstances as described above, and the mounting portion can be configured to be large so that the mounting workability to the other side is good. On the other hand, the shaft body has good damping characteristics and durability. The purpose of the present invention is to provide a body-shaped viscous fluid-filled damper.

Thus, the first aspect of the present invention relates to a shaft-integrated viscous fluid-filled damper, which is provided such that (a) a cylindrical peripheral wall portion and (b) one end in the axial direction of the peripheral wall portion are closed. A bottom, and (c) a thin flexible film continuously provided on the peripheral wall at one end of the peripheral wall opposite to the bottom, and (d) a cylindrical shape with a bottom on the inside. An agitation part having a shaft body embedding hole and provided at the center of the flexible film and closing the one end of the peripheral wall part opposite to the bottom part together with the flexible film; A shaft body that is integrally formed with the stirring portion in a state of being embedded in the hole, and is fixed to one of the supporting member and the supported member at the mounting portion provided on the portion protruding to the outside, and as a whole A viscous fluid such as silicone oil is enclosed in a sealed container shape, and the support is based on the stirring action of the stirring unit on the viscous fluid. In shaft integrated viscous fluid-filled damper for vibration absorption between wood and the supported member, of the projecting portion to the outside in the shaft body, said mounting portions of spaced distally from said flexible film As a part , the part between the attachment part and the inner peripheral side of the flexible membrane and between the outer surface of the inner peripheral part of the membrane around the stirring part is configured as a base part, and the base part is uniform. The cross-sectional shape extends in the axial direction, the dimension perpendicular to the axis is smaller than the inner peripheral end dimension of the inner peripheral portion of the membrane, and the outer diameter of the portion embedded in the embedded hole in the shaft body The dimensions of the mounting part are not in contact with the outer surface of the inner peripheral part of the membrane both during molding and during vibration isolation, and the mounting part has a larger dimension in the direction perpendicular to the axis than the base part. It has a flat plate shape, and the flexible membrane stands from the inner peripheral portion of the membrane and the outer peripheral end of the inner peripheral portion of the membrane. The outer surface of the inner peripheral portion of the film is formed as a flat surface in the direction perpendicular to the axis, and the thickness T of the inner peripheral portion of the film is larger than the thickness t of other portions. In addition to being thick, the outer surface of the intersection between the inner peripheral portion of the membrane and the cylindrical portion of the membrane has an angular cross section .

Of those claims 2, Oite to claim 1, that the mounting portion and the screw hole and positioning holes for inserting the fixing screws, are respectively provided in a state penetrating the mounting portion in the thickness direction It is characterized by.

Claim 3 relates to a method of manufacturing a shaft-integrated viscous fluid-filled damper, and the manufacturing method includes a molding die for molding the shaft-integrated viscous fluid-filled damper according to any one of claims 1 and 2. A pair of body parts for forming the outer surface of the cylindrical film part, and a pair that slides with respect to the main body part, forming an outer surface of the inner peripheral part of the film and a projecting portion of the shaft body from the inner peripheral part of the film And forming the outer surface of the membrane cylindrical portion of the flexible membrane, the outer surface of the inner peripheral portion of the membrane and the attachment portion and the base portion of the shaft body with the molding die, The molded product is demolded in the axial direction of the shaft body by opening a pair of slide molds by sliding in a direction perpendicular to the axis of the shaft body .

Effects and effects of the invention

As described above, according to the present invention, in the viscous fluid-filled damper integrated with the shaft body, the tip-side portion of the projecting portion of the shaft body that is separated from the flexible film serves as an attachment portion, and the direction perpendicular to the axis thereof small dimensions than the inner peripheral edge dimension of the film in the peripheral portion of the flexible film in the axial direction perpendicular dimension for large dimensions and without, or group portion than the base portion located between the dimensions and mounting portion and the flexible membrane In both the molding and anti-vibration action, the outer surface of the inner peripheral part of the membrane around the stirring part of the flexible film has a non-contact shape. Thus, the attachment workability to the other side (supported member or support member) can be improved.

On the other hand, the base located between the mounting portion and the flexible membrane has a non-contact shape with respect to the flexible membrane both during molding and during vibration isolation, so that the flexible membrane can be effectively used. The bending length (length in the direction perpendicular to the axis) can be increased, that is, the flexible deformation region can be widened, and the damping characteristics (vibration-proof characteristics) of the viscous fluid-sealed damper can be improved.
In addition, since the shaft body and the outer surface of the flexible membrane are not joined, it is possible to prevent the phenomenon that the flexible membrane is broken due to partial stress concentration on the flexible membrane, and the durability of the viscous fluid-filled damper is improved. be able to.
That is, according to the present invention, it is possible to ensure good attachment workability to the other side, good damping characteristics, and durability performance.

Wherein said attachment portion is your clauses without a flat plate-like shape.
On the other hand, the base has a uniform cross-sectional shape and extends in the axial direction .

In the present invention, the inner peripheral portion of the flexible membrane, that is, the outer surface of the portion around the stirring portion is a flat surface perpendicular to the axis.
In this way, the portion of the molding die that molds the outer surface of the inner peripheral portion of the film can be a slide mold that slides in the direction perpendicular to the axis and opens and closes (the molding method shown in FIG. The part that molds the mounting part of the mounting part is a slide mold in the same direction), so that the shaft body whose axis perpendicular direction dimension is large with respect to the base part can be easily molded and removed. Become.

Furthermore, the thickness T of the film inner periphery of the flexible membrane keep Na thicker than the thickness t of the other portions.
In this way, the parting line formed by the slide mold for forming the outer surface of the inner peripheral portion of the film and the main body portion of the molding die for forming the outer surface of the membrane cylindrical portion falling from the outer peripheral end is formed in the inner peripheral portion of the film. Even if a burr occurs during molding at the outer peripheral edge of the part, since the thickness of the inner peripheral part of the film is increased, stress is concentrated on the burr part and the flexible film is torn from there. Occurrence can be prevented well, and the durability of the flexible membrane, and thus the durability of the viscous fluid-sealed damper can be improved.
Here, T can be set to be not less than twice t.

In the present invention, the membrane cylindrical portion is formed in a falling shape from the outer circumferential end of the membrane inner circumferential portion, and the outer surface of the crossing portion between the membrane inner circumferential portion and the membrane cylindrical portion has a cross-sectional angular shape. Thus, in combination with making the outer surface of the inner peripheral portion of the film a flat surface, the portion for molding the outer surface of the inner peripheral portion of the molding die can be easily configured as a slide mold in the direction perpendicular to the axis. it can.
The mounting portion can be provided with a screw hole through which the fixing screw is inserted (Claim 2) .

Next, an embodiment in which the present invention is applied to an anti-vibration support of an in-vehicle disc player will be described in detail with reference to the drawings.
In FIG. 1, 10 is a main body mechanism unit (supported member) in a disc player, and 12 is a support frame (support member).
The main body mechanism unit 10 is elastically supported by a support frame 12 via a spring (not shown).
Between the main body mechanism unit 10 and the support frame 12, the shaft body integrated viscous fluid sealing damper 14 of this embodiment is interposed, and the main body mechanism unit 10 and the support frame 12 are connected to the viscous fluid. It is connected via an enclosed damper 14.
Here, the viscous fluid-filled damper 14 is disposed sideways.

2 and 3 show a specific configuration of the viscous fluid-filled damper 14 of this embodiment.
As shown in the figure, the viscous fluid-filled damper 14 includes a cylindrical peripheral wall portion 16, a bottom portion 18 that closes one end in the axial direction thereof, and a peripheral wall portion at one end opposite to the bottom portion 18 of the peripheral wall portion 16. 16, a thin flexible film 20 provided continuously to 16, and a stirring part 22 provided at the center of the flexible film 20 and closing the one end of the peripheral wall 16 opposite to the bottom 18 together with the flexible film 20. As a whole, it has a sealed container shape, and a viscous fluid 24 such as silicone oil is sealed inside.
In the viscous fluid-filled damper 14, the stirring unit 22 moves relative to the viscous fluid 24 together with a shaft 38 to be described later, and the support frame 12, the main body mechanism unit 10, and the like based on the stirring action on the viscous fluid 24 at that time. It absorbs vibration between the two.

The peripheral wall portion 16 is composed of an outer peripheral wall portion 26 made of hard resin (here, polypropylene) and an inner peripheral wall portion 28 made of a soft elastic body (rubber, elastomer, etc.).
The flexible membrane 20 and the stirring portion 22 are integrally formed of the same elastic body as the inner peripheral wall portion 28.
On the other hand, the bottom 18 is made of a hard resin (here, polypropylene) like the outer peripheral wall 26.
Here, the bottom portion 18 is formed separately from the peripheral wall portion 16, and is fixed to one end of the peripheral wall portion 16 after the viscous fluid 24 is injected, and is integrated with the peripheral wall portion 16.
A mounting portion 29 for fixing to the support frame 12 is integrally formed on the bottom portion 18.

In FIG. 2 (B), 30 is a portion on the inner peripheral side of the flexible membrane 20 and represents the inner peripheral portion of the membrane around the stirring portion 22 extending in the direction perpendicular to the axis, and 32 is the inner peripheral portion 30 of the membrane. The 1st film | membrane cylindrical part (inner cylinder part) which falls in the figure downward from the outer peripheral end of this is represented.
Reference numeral 34 denotes a film outer peripheral portion that extends in the radial direction (perpendicular to the axis) again from the lower end of the first film cylindrical portion 32 and is connected to the outermost second film cylindrical portion (outer cylindrical portion) 35.

Here, the inner peripheral portion 30 in the figure has a flat surface whose upper surface (outer surface) in the drawing is perpendicular to the axis, and the thickness T thereof is twice the thickness t of other portions. ing.
Furthermore, the outer surface of the intersection of the inner membrane portion 30 and the first membrane cylinder portion 32 has an angular cross section. That is, the outer surface shape in the cross section of the corner portion C is a square shape.
However, the outer shape of the corner portion C may have a small bend with a radius of 0.3 mm or less.

The stirring portion 22 has a cylindrical shape with a bottom, and an embedded hole 36 is formed inside.
Reference numeral 38 denotes a shaft body made of a hard resin (polypropylene in this case) formed integrally with the stirring portion 22, and a part of the shaft body is integrally formed in the stirring portion 22 in a state of being embedded in the embedded hole 36 by two-color molding. . In the drawing, reference numeral 40 denotes an embedded portion in the embedded hole 36.
The embedded portion 40 has a circular cross section, and has a hook-like portion 42 that protrudes radially outward in an annular shape at the upper end thereof.

The shaft body 38 protrudes to the outside from the stirring portion 22, and a mounting portion 44 is provided on the tip side of the protruding portion.
As shown in FIG. 3, the attachment portion 44 has a flat plate shape, and its width dimension, that is, the dimension perpendicular to the axis Y is the width of the base portion 46 between the attachment portion 44 and the flexible membrane 20. It is a large dimension with respect to the dimension, that is, the dimension X perpendicular to the axis. Here, the base 46 has a rectangular cross section.
The mounting portion 44 has a circular screw hole 48 through which the fixing screw 52 (see FIG. 1 (B)) is inserted, and a circular positioning hole 50 below the mounting screw 44 in the plate thickness direction. It is formed in a penetrating state.

FIG. 1B shows a structure for attaching the attachment portion 44 to the main body mechanism unit 10.
As shown in the figure, here, the fixing screw 52 is inserted into the screw hole 48 of the mounting portion 44 and then screwed into the screw hole 56 of the fixing portion 54 of the main body mechanism unit 10. The part 44 and the fixing part 54 are screwed, that is, the viscous fluid-filled damper 14 is fixedly attached to the main body mechanism unit 10.
Further, a positioning pin 58 protruding from the fixing portion 54 is fitted in the positioning hole 50 of the mounting portion 44, whereby the mounting portion 44 is positioned with respect to the fixing portion 54.

FIG. 4 shows a main part of a method for forming the viscous fluid-filled damper 14.
In the figure, reference numeral 60 denotes a molding die, which has a main body 62 and slide dies 64-1 and 64-2 that slide in a direction perpendicular to the axis (left and right in the figure) to advance and retreat.
Here, forming pins 66 and 68 for forming the screw hole 48 and the positioning hole 50 of the mounting portion 44 project from the slide die 64-1.
These slide molds 64-1 and 64-2 are slidable in the plate thickness direction of the mounting portion 44.

In the present embodiment, the upper surface of the inner peripheral portion 30 of the flexible membrane 20 and the projecting portion of the shaft body 38 to the outside, specifically, the base portion 46 and the mounting portion 44 are formed in these slide molds 64-1 and 64-2. To be molded.
Therefore, according to this molding method, as shown in FIG. 5, after the molding, the slide molds 64-1 and 64-2 are slid in the backward direction and opened to remove the molded product downward without any trouble. can do.

In the present embodiment, it is possible to form the inner peripheral portion 30 of the flexible membrane 20 by such slide molds 64-1 and 64-2. This is based on the fact that it has become a flat surface in a perpendicular direction.
In this case, a parting line between the slide molds 64-1 and 64-2 and the main body portion 62 is formed along the outer peripheral end of the inner membrane portion 30, but in this embodiment, the thickness T of the inner membrane portion 30 is Since it is thicker than the wall thickness t of the other part, its parting line is formed at the corner of the corner C, and burrs are formed at the corner C. Even if this occurs, the durability of the flexible membrane 20 can be kept good.

  As described above, in the present embodiment, the width of the attachment portion 44 at the distal end portion separated from the flexible film 20 among the protrusions of the shaft body integrated viscous fluid-filled damper 14 to the outside of the shaft body 38. The dimension (dimension perpendicular to the axis) Y is a large dimension, the width dimension (dimension perpendicular to the axis) X of the base 46 on the lower side in the figure is a small dimension, and a flexible membrane both during molding and during vibration isolation Therefore, the mounting workability when mounting and fixing the mounting portion 44 to the main body mechanism unit 10 can be improved.

Further, since the shaft body 38 (specifically, the base 46) is not in contact with the flexible membrane 20, the effective flexible length (length in the direction perpendicular to the axis) of the flexible membrane 20 can be increased, and the viscous fluid-filled damper 14 can be increased. The attenuation characteristic can be improved.
In addition, since the shaft body 38 (specifically, the attachment portion 44) and the flexible film 20 are not joined, a large stress concentration occurs partially on the flexible film 20, and the flexible film 20 is broken by the stress concentration. Such a phenomenon can be prevented, and the durability of the viscous fluid-filled damper 14 can be enhanced.
That is, according to this embodiment, it is possible to ensure good attachment workability to the other side, good damping characteristics, and durability performance.

  Further, according to the present embodiment, the burr is generated at the time of forming the viscous fluid-filled damper 14 at the outer peripheral edge of the inner peripheral portion 30 of the film whose upper surface forms a flat surface in the direction perpendicular to the axis and at the corner portion C. Since the thickness T of the inner circumferential portion 30 is thicker than the thickness t of other portions, and further, the corner portion C has an angular cross section, so that burrs are generated at the corner portion C. Even if it occurs, it can effectively prevent the durability of the flexible membrane 20 from being lowered.

  Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be configured in various forms without departing from the spirit of the present invention.

It is a figure which shows the viscous fluid enclosure damper of one Embodiment of this invention in an attachment state. It is a figure which shows the viscous fluid enclosure damper of the embodiment in a single-piece | unit state. It is a perspective view which cuts out the viscous fluid enclosure damper of the embodiment, and is partially cut away. It is explanatory drawing of the shaping | molding method of the viscous fluid enclosure damper of the embodiment. It is explanatory drawing which takes out and shows the process of FIG. 4 (II). It is a figure which shows an example of the conventional viscous fluid enclosure damper. It is a figure which shows the example different from FIG. 6 of the conventional viscous fluid enclosure damper. It is a comparative example figure which shows the viscous fluid enclosure damper of the same shaft body type as FIG. 7 as a comparative example. It is explanatory drawing of the shaping | molding method of the viscous fluid enclosure damper of FIG.

10 Main body mechanism unit (supported member)
12 Support frame (support member)
DESCRIPTION OF SYMBOLS 14 Viscous fluid enclosure damper 16 Peripheral wall part 18 Bottom part 20 Flexible film 22 Stirring part 24 Viscous fluid 30 Inner film peripheral part 32 1st film | membrane cylindrical part 36 Embedded hole 38 Shaft body 44 Mounting part 46 Base 48 Screw hole 52 Fixing screw C Corner (crossover)
X Base axis perpendicular dimension Y Mounting part perpendicular axis dimension T Thickness of inner periphery of membrane t Thickness of other parts

Claims (3)

(A) a cylindrical peripheral wall portion; (b) a bottom portion provided in a state in which one end of the peripheral wall portion in the axial direction is closed; and (c) the peripheral wall at one end of the peripheral wall portion opposite to the bottom portion. A thin flexible membrane continuously provided in the section, and (d) a cylindrical shape with a bottom, and a shaft body embedding hole on the inside, provided at the center of the flexible membrane. A stirring portion that closes one end of the peripheral wall portion opposite to the bottom portion together with the flexible membrane; and (e) a portion that is integrally formed with the stirring portion so as to be embedded in the embedding hole and protrudes to the outside. And a shaft body that is fixedly attached to one of the support member and the supported member in the attachment portion provided in the container, and has a sealed container shape as a whole, in which a viscous fluid such as silicone oil is enclosed, and the stirring portion Shaft-integrated viscous fluid-filled damper that absorbs vibration between the support member and the supported member based on the stirring action of the viscous fluid on the shaft Oite,
Of the projecting portion to the outside of the shaft body, a portion on the distal end side separated from the flexible membrane is used as the mounting portion, and the stirring portion is a portion on the inner peripheral side of the flexible membrane, and the stirring portion The part between the outer surface of the inner peripheral part of the surrounding film is configured as a base part,
The base portion has a uniform cross-sectional shape, extends in the axial direction, has a dimension perpendicular to the axis smaller than the inner peripheral end size of the inner peripheral portion of the membrane, and is embedded in the embedded hole in the shaft body. There is no dimension larger than the outer diameter dimension of the embedded part, and it is in a non-contact shape with respect to the outer surface of the inner peripheral part of the film at the time of molding and vibration isolating,
The mounting part is a flat plate with a dimension perpendicular to the axis larger than that of the base part,
Further, the flexible membrane has a shape having an inner peripheral portion of the membrane and a cylindrical portion of the membrane that falls from the outer peripheral end of the inner peripheral portion of the membrane, and the outer surface of the inner peripheral portion of the membrane is a flat surface in a direction perpendicular to the axis. The thickness T of the inner peripheral portion of the film is made thicker than the thickness t of the other part, and the outer surface of the intersection of the inner peripheral portion of the film and the cylindrical portion of the membrane has a cross-sectional angular shape. shaft integral viscous fluid-sealed damper, characterized in that there. Oite to claim 1, wherein the attachment portion includes a screw hole for inserting the fixing screws and positioning holes, shaft one, characterized in that is provided in a state penetrating the mounting portion in the thickness direction, respectively Body type viscous fluid filled damper. A molding die for molding the shaft body-integrated viscous fluid-filled damper according to any one of claims 1 and 2, a main body portion for molding the outer surface of the membrane cylindrical portion, the outer surface of the inner peripheral portion of the membrane, and the shaft body And a pair of slide molds that slide with respect to the main body, and forming the projecting portion to the outside from the inner peripheral portion of the membrane, and the outer surface of the membrane cylindrical portion of the flexible membrane by the molding die After forming the outer surface of the inner peripheral portion of the membrane and the mounting portion and the base of the shaft body, the pair of slide molds are slid in the direction perpendicular to the axis of the shaft body to open the molded product. A method for manufacturing a shaft-integrated viscous fluid-filled damper, wherein the mold is removed in the axial direction.

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