JP2018017305A - Process of manufacture of fluid sealed type cylindrical vibration-proof device, manufacturing jig for fluid sealed type cylindrical vibration-proof device used for the same and device for manufacturing fluid sealed type cylindrical vibration-proof device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a process of manufacture of new and improved fluid sealed type cylindrical vibration-proof device, a manufacturing jig having a new and improved structure used for the manufacturing and a manufacturing device in which an increased inner pressure in a sealed region can be reduced and processing can be carried out when a diameter reducing processing for an outer cylindrical member is performed.SOLUTION: This invention relates to a process of manufacturing a fluid sealed type cylindrical vibration-proof device 10 in which an outer cylindrical member 20 is outwardly fitted and fixed to a vulcanized formed product 18 where an inner shaft member 12 and an intermediate cylindrical member 14 are connected by a main body rubber elastic body 16 to form incompressible fluid sealed regions 42, 44. When the outer cylindrical member 20 is processed in the incompressible fluid to reduce its diameter to fit and fix the outer cylindrical member 20 to the intermediate cylindrical member 14 to tight-sealingly form the sealed regions 42, 44, an axial direction wall part 32 of a pocket part 30 is partially pressed from outside onto a peripheral part, so that a volume of the pocket part 30 is set for its adjustment and at the same time a bulged-out deformation of the axial direction wall part 32 is allowed at a part where no pressing is applied and further the outer cylindrical member 20 is processed to reduce its diameter after the sealed regions 42, 44 are sealed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for manufacturing a fluid-filled cylindrical vibration isolator used for an engine mount, a suspension bush, etc. of an automobile, a jig for manufacturing a fluid-filled cylindrical vibration-proof device, and a fluid-filled cylindrical vibration-proof device. It relates to a manufacturing apparatus.

  2. Description of the Related Art Conventionally, fluid-filled cylindrical vibration damping devices used for automobile engine mounts and suspension bushes are known. The fluid-filled cylindrical vibration isolator has a structure in which an outer cylinder member is fitted and fixed to a vulcanized product in which an intermediate cylinder member is arranged on the outer periphery of an inner shaft member and elastically connected by a main rubber elastic body. have. Then, the opening of the pocket portion of the main rubber elastic body that opens to the outer peripheral surface through the window provided in the intermediate cylinder member is covered with the outer cylinder member, thereby forming an incompressible fluid sealing region, An anti-vibration effect based on the flow resistance, resonance action, etc. of the enclosed incompressible fluid is exhibited.

  By the way, when manufacturing such a fluid-filled cylindrical vibration isolator, the outer tubular member is assembled to the vulcanized molded product in a water tank filled with an incompressible fluid, so that the non-compressed fluid is not sealed. A manufacturing method is known in which the compressive fluid is sealed simultaneously with the assembly of the outer cylinder member to the vulcanized product. In addition, it is effective to adjust and set the amount of sealed fluid in order to stably obtain the desired vibration isolation performance and durability.

  Therefore, the present applicant, in Japanese Utility Model Publication No. 7-12749 (Patent Document 1), presses the main rubber elastic body in the axial direction when assembling the outer cylinder member to the vulcanized molded product in the water tank. It was proposed to elastically deform the part of the rubber elastic body that constitutes the wall of the enclosed region. As a result, the amount of incompressible fluid sealed in the sealed region, the pressure in the sealed region, and the like are adjusted, and the vibration-proof performance and stability of the manufactured fluid-filled cylindrical vibration-proof device are improved. be able to.

  However, as a result of further studies by the inventor, it has become clear that there is still room for improvement. That is, in the fluid-filled cylindrical vibration isolator, there is a case where radial pre-compression is applied to the main rubber elastic body for the purpose of improving durability or the like, but the incompressible fluid is sealed in the sealed region. If the main rubber elastic body is pre-compressed by further reducing the diameter of the outer cylinder member from the outside, the internal pressure in the enclosing region rises, making it difficult to reduce the diameter of the outer cylinder member. In particular, after the fitting of the outer cylinder member to the intermediate cylinder member due to the reduced diameter is completed at both end portions in the axial direction, it is possible to pre-compress the main rubber elastic body by reducing the diameter of the intermediate portion in the axial direction of the outer cylinder member. In such a case, it is necessary to reduce the diameter of the outer cylinder member with a larger force because the inner pressure in the sealed region becomes more difficult.

No. 7-12749

  The present invention has been made in the background of the above-mentioned circumstances, and the solution is to reduce the increase in internal pressure in the enclosed region during the diameter reduction of the outer cylindrical member, and to easily reduce the diameter with a small force. Another object of the present invention is to provide a novel method for manufacturing a fluid-filled cylindrical vibration damping device. Another object of the present invention is to provide a manufacturing jig and a manufacturing apparatus having a novel structure used for manufacturing a fluid-filled cylindrical vibration isolator.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible.

  That is, according to the first aspect of the present invention, the outer cylindrical member is fitted and fixed to the vulcanized molded product in which the intermediate cylindrical member is arranged on the outer periphery of the inner shaft member and connected by the main rubber elastic body, A fluid-filled type in which the opening of the pocket portion of the main rubber elastic body that opens to the outer peripheral surface through a window provided in the intermediate tube member is covered with the outer tube member to form a sealed region for an incompressible fluid A method of manufacturing a cylindrical vibration isolator, wherein the outer cylinder member extrapolated to the vulcanized molded product is reduced in diameter in the incompressible fluid and provided on both axial sides of the intermediate cylinder member. When the sealed region in which the incompressible fluid is sealed is hermetically sealed by fluidly fitting and fixing the axially opposite side portions of the outer cylindrical member to the annular fitting portion, the main rubber elastic body includes the Partially outward on the circumference of the axial wall of the pocket To adjust the volume of the pocket portion, and to allow the axial wall portion to bulge outwardly in a portion that is not pressed from the outside on the circumference, thereby the outer cylinder. The outer cylinder member is further reduced in diameter even after the member comes into fluid tight contact with the annular fitting portion and the sealing region is sealed.

  According to the method for manufacturing the fluid-filled cylindrical vibration isolator according to the first aspect, the axial wall of the pocket portion of the main rubber elastic body is partially pressed in the circumferential direction, and the axial wall is not pressed. Even if the outer cylindrical member is reduced in diameter after the enclosing region is sealed, the volume of the pocket portion is reduced by allowing the axial wall portion to bulge outwardly at other portions in the circumferential direction of the portion. It is possible to reduce the increase in the internal pressure of the enclosed region while adjusting the setting. Therefore, even after the sealing region is sealed, the outer cylinder member can be easily reduced in diameter with a relatively small force. For example, the main rubber elastic body can be pre-compressed by reducing the diameter of the outer cylinder member. It can be realized effectively.

  According to a second aspect of the present invention, in the method for manufacturing a fluid-filled cylindrical vibration isolator described in the first aspect, the main rubber elastic body is formed with a pair of pocket portions on both sides in a direction perpendicular to the axis. The pair of pocket portions open to the outer peripheral surface through a pair of windows provided on both sides in the direction perpendicular to the axis of the intermediate cylinder member, while the pair of pocket portions in the main rubber elastic body In the first aspect, the fluid-filled vibration isolator having a structure in which a connecting arm portion that connects the inner shaft member and the intermediate cylinder member in a direction perpendicular to the axis is provided between the circumferential directions. When the sealing region is manufactured in a sealed manner according to the manufacturing method, the connecting arm portion is removed from the circumferential direction so that the connecting arm portion of the main rubber elastic body is not directly pressed in the axial direction. It is a thing that makes you press from the side That.

  According to the second aspect, by allowing the axial wall portion of each pocket portion to partially bulge outward in the circumferential direction in the circumferential direction, the pocket portion can The increase in the internal pressure of the configured sealing region can be reduced, respectively, and the outer cylinder member can be easily reduced in diameter.

  Furthermore, when pressing the axial wall part of each pocket part, the axial direction with respect to a connection arm part is pressed by pressing an axial wall part from the outer side in the position which removed the connection arm part of the main body rubber elastic body in the circumferential direction. Therefore, the connecting arm portion can be efficiently pre-compressed in the radial direction by reducing the diameter of the outer cylindrical member.

  According to a third aspect of the present invention, in the method for manufacturing a fluid-filled cylindrical vibration isolator described in the first or second aspect, when the sealed region is hermetically formed, the axial direction of the main rubber elastic body In a state where the axial wall portion of the pocket portion on one side is abutted and supported from the outside, the axial wall portion of the pocket portion on the other side in the axial direction is partially pressed from the outside on the circumference. Is.

  According to the third aspect, while the one axial wall portion of the pocket portion of the main rubber elastic body is abutted and supported from the outside, the other axial wall portion of the pocket portion is partially outward in the circumferential direction. The volume of the enclosing region can be adjusted and set with higher accuracy by pressing from above.

  According to a fourth aspect of the present invention, an outer cylinder member is externally fitted and fixed to a vulcanized molded product in which an intermediate cylinder member is arranged on the outer periphery of an inner shaft member and connected by a main rubber elastic body. A fluid-filled tubular shape in which the opening of the pocket portion of the main rubber elastic body that opens to the outer peripheral surface through a window provided in the tubular member is covered with the outer tubular member to form an incompressible fluid sealing region In the manufacturing process of the vibration isolator, the outer cylinder member extrapolated to the vulcanized molded product is subjected to diameter reduction processing in the incompressible fluid, and annular fittings provided on both axial sides of the intermediate cylinder member Manufacture of a fluid-filled cylindrical vibration isolator used for sealingly forming the sealed region in which the incompressible fluid is sealed by fluidly fitting and fixing the axially opposite side portions of the outer tube member to the fitting portion A jig for the axial direction with respect to the inner shaft member An annular base portion that is extrapolated from the portion, and an axially inner surface of the annular base portion that faces the main rubber elastic body protrudes in the axial direction to form the pocket portion of the main rubber elastic body. A pressing protrusion that is brought into contact with the axial wall portion from the outside, and the pressing protrusion is not in contact with the axial wall portion even in a contact state with the axial wall portion of the pocket portion. The non-contact portion is provided at a different position in the circumferential direction.

  According to the manufacturing jig for the fluid-filled cylindrical vibration isolator according to the fourth aspect, the axial wall portion of the pocket portion of the main rubber elastic body is partially pressed in the circumferential direction by the pressing protrusion, The bulging deformation to the outside of the direction wall portion can be allowed by the non-contact portion. Therefore, by reducing the diameter of the outer cylindrical member while bringing the pressing protrusion of the jig according to this aspect into contact with the axial wall portion, the volume of the enclosed region can be adjusted and set. Even after sealing, the outer cylinder member can be easily reduced in diameter with a relatively small force.

  According to a fifth aspect of the present invention, in the jig for manufacturing a fluid-filled cylindrical vibration isolator described in the fourth aspect, the pressing protrusions are both circumferential edges of the annular base part on the protruding tip surface. In the portion, the surface shape has no edge connected with a smooth curved surface shape to both side surfaces in the circumferential direction rising from the annular base portion in the protruding direction.

  According to the 5th aspect, the contact part of the press protrusion in a main body rubber elastic body (axial wall part) is because the circumferential direction both-ends edge part of the press protrusion is made into the smooth surface shape without an edge. In this case, the occurrence of cracks and the like is prevented by the dispersion of stress.

  According to a sixth aspect of the present invention, an outer cylindrical member is externally fitted and fixed to a vulcanized molded product in which an intermediate cylindrical member is arranged on the outer periphery of an inner shaft member and connected by a main rubber elastic body. A fluid-filled tubular shape in which the opening of the pocket portion of the main rubber elastic body that opens to the outer peripheral surface through a window provided in the tubular member is covered with the outer tubular member to form an incompressible fluid sealing region When manufacturing the vibration isolator, the outer cylinder member extrapolated to the vulcanized molded product is reduced in diameter in the incompressible fluid, and annular fittings provided on both axial sides of the intermediate cylinder member are provided. An apparatus for manufacturing a fluid-filled cylindrical vibration isolator that hermetically seals and forms the enclosed region filled with the incompressible fluid by fluidly fitting and fixing the axially opposite side portions of the outer tubular member to the attachment portion. The axial wall of the pocket portion in the main rubber elastic body A pressing protrusion that is pressed against the outside from the outside to press and deform the axial wall portion inward in the axial direction, and is not in contact with the axial wall portion of the pocket portion. The wall portion is characterized in that the non-contact portion that allows outward deformation due to the internal pressure of the enclosed region in the wall portion is provided at a different position in the circumferential direction.

  According to the manufacturing apparatus of the fluid-filled cylindrical vibration isolator according to the sixth aspect, the axial wall while the axial wall portion of the pocket portion of the main rubber elastic body is partially pressed in the circumferential direction by the pressing protrusion. The outward deformation of the part can be allowed by the non-contact part. Therefore, the volume of the enclosing region can be adjusted and set by reducing the diameter of the outer cylinder member while the pressing projection is brought into contact with the axial wall portion by the manufacturing apparatus according to this aspect. Even after sealing, the outer cylinder member can be easily reduced in diameter with a relatively small force.

  According to the present invention, the axial wall portion of the pocket portion of the main rubber elastic body is partially pressed in the circumferential direction, and the axial wall portion is not pressed in the other circumferential portion of the axial wall portion that is not pressed. By allowing outward deformation, even if the outer cylinder member is reduced in diameter after the enclosure region is sealed, the increase in the internal pressure of the enclosure region is reduced while the volume of the pocket portion is adjusted and set. be able to. Therefore, even after the sealing region is sealed, the outer cylinder member can be easily reduced in diameter with a relatively small force. For example, the main rubber elastic body can be pre-compressed by reducing the diameter of the outer cylinder member. It can be effectively realized.

1 is a cross-sectional view showing a fluid-filled cylindrical vibration isolator manufactured by a method for manufacturing a fluid-filled cylindrical vibration isolator as a first embodiment of the present invention. II-II sectional drawing of FIG. It is sectional drawing explaining the diameter reduction process process of the outer cylinder member in the manufacturing method of the fluid filled type | mold vibration isolator shown in FIG. 1, Comprising: The figure which shows the completion state of a diameter reduction process. The bottom view of the diameter reduction process part which comprises the manufacturing apparatus used for manufacture of the fluid filling type | mold cylindrical vibration isolator shown in FIG. It is sectional drawing explaining the diameter reduction process process of the outer cylinder member in the manufacturing method of the fluid enclosure type | formula vibration isolator shown in FIG. 1, Comprising: The figure which shows the state before diameter reduction processing. The perspective view of the upper side jig | tool used for the diameter reducing process of the outer cylinder member shown in FIG. It is sectional drawing of the upper side jig | tool shown in FIG. 6, Comprising: The figure corresponded in the VII-VII cross section of FIG. The bottom view of the upper side jig | tool shown in FIG. The figure which expands and shows the principal part in the diameter reducing process of an outer cylinder member. The figure which shows typically the expansion | deployment cross section of the principal part in the diameter reducing process of an outer cylinder member. It is sectional drawing which shows the upper side jig | tool used for the manufacturing method of the fluid enclosure type | mold cylindrical vibration isolator as 2nd embodiment of this invention, Comprising: The figure corresponded in the XI-XI cross section of FIG. The bottom view of the upper side jig | tool shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 show an engine mount 10 for an automobile as a first embodiment of a fluid-filled cylindrical vibration isolator according to the present invention. The engine mount 10 has a structure in which an outer cylinder member 20 is fitted and fixed to a vulcanized molded product 18 in which an inner shaft member 12 and an intermediate cylinder member 14 are elastically connected to each other by a main rubber elastic body 16. . In the following description, the vertical direction means the vertical direction in FIG. 1 in principle.

  More specifically, the inner shaft member 12 has a substantially cylindrical shape with a thick and small diameter that extends linearly, and is a highly rigid member formed of metal such as iron or aluminum alloy, synthetic resin, or the like. . Further, the inner shaft member 12 is fixedly provided with a pair of stopper protrusions 22, 22 made of synthetic resin or metal, and protrudes from the inner shaft member 12 to both sides in the radial direction.

  An intermediate cylinder member 14 is disposed on the outer periphery of the inner shaft member 12. The intermediate cylinder member 14 has a thin-walled, large-diameter, generally cylindrical shape, and includes a small-diameter fitting groove 24 at an axially intermediate portion, and a large-diameter annular fitting portion 26 at both axial end portions. Are provided. Further, a pair of windows 28, which are open on both sides in the radial direction, are formed in the intermediate portion in the axial direction of the intermediate cylinder member 14.

  The intermediate cylinder member 14 is externally inserted into the inner shaft member 12 and arranged on the outer periphery, and the inner shaft member 12 and the intermediate cylinder member 14 are elastically connected to each other by a main rubber elastic body 16. The main rubber elastic body 16 has a thick, substantially cylindrical shape, the inner peripheral surface is vulcanized and bonded to the outer peripheral surface of the inner shaft member 12, and the outer peripheral surface is the inner peripheral surface of the intermediate cylindrical member 14. Is vulcanized and bonded. As a result, a vulcanized molded product 18 is formed in which the inner shaft member 12 and the intermediate cylinder member 14 are connected by the main rubber elastic body 16.

  Further, a pair of pocket portions 30 is formed in the main rubber elastic body 16. The pocket portion 30 is formed at an intermediate portion in the axial direction of the main rubber elastic body 16 and is open to the outer peripheral surface, and a pair that opens toward both sides in one radial direction is formed. And the opening part of a pair of pocket parts 30 and 30 is positioned with a pair of window parts 28 and 28 of the intermediate | middle cylinder member 14, and these pair of pocket parts 30 and 30 go to an outer periphery through a pair of window parts 28 and 28. It is open. The stopper protrusions 22 and 22 provided on the inner shaft member 12 protrude in the radial direction from the inner peripheral surfaces of the pair of pocket portions 30 and 30, and the surfaces of the stopper protrusions 22 and 22 are elastic on the main body. It is covered with a buffer rubber 38 formed integrally with the body 16.

  By forming the pocket portions 30, 30, the main rubber elastic body 16 is an upper axial wall portion 32 that is an upper wall portion of the pocket portions 30, 30 and a lower wall portion of the pocket portions 30, 30. The lower-axis-direction wall portion 34 and the connecting arm portions 36 and 36 that are wall portions at both ends in the circumferential direction of the pocket portions 30 and 30 are provided. The connecting arm portions 36, 36 connect the inner shaft member 12 and the intermediate cylindrical member 14 in the direction perpendicular to the axis, and are formed between the circumferential directions of the pair of pocket portions 30, 30, and are fitted in the intermediate cylindrical member 14. The groove portions 24, 24 are fixed to the forming portions.

  Further, the outer cylinder member 20 is fixed to the intermediate cylinder member 14 in an extrapolated state. The outer cylinder member 20 is a highly rigid member made of metal, synthetic resin, or the like, and has a thin cylindrical shape with a large diameter. Further, the inner peripheral surface of the outer cylinder member 20 is substantially entirely covered with a seal rubber layer 40.

  The outer cylinder member 20 is extrapolated to the intermediate cylinder member 14 and disposed on the outer periphery, and the outer cylinder member 20 is subjected to diameter reduction processing such as an eight-way drawing, whereby the outer cylinder member 20 is axially disposed. Both end portions are fitted and fixed to the upper and lower annular fitting portions 26 and 26 of the intermediate cylinder member 14. A seal rubber layer 40 is sandwiched between the radial fitting portions 26, 26 of the intermediate cylinder member 14 and both axial end portions of the outer cylinder member 20, and the intermediate cylinder member 14 and the outer cylinder member Between 20 is sealed fluid-tight.

  Thus, by attaching the outer cylinder member 20 to the intermediate cylinder member 14 of the vulcanized molded product 18, the pair of window portions 28, 28 are closed by the outer cylinder member 20, and the pair of window portions 28, The openings of the pair of pocket portions 30, 30 opened to the outer periphery through 28 are covered with the outer cylinder member 20 in a fluid-tight manner. As a result, the first fluid chamber 42 and the second fluid chamber 44 as an enclosed region in which at least a part of the wall portion is configured by the main rubber elastic body 16 are formed by the pair of pocket portions 30 and 30. .

  Further, incompressible fluid is sealed in the first and second fluid chambers 42 and 44. The incompressible fluid is not particularly limited, and for example, water, ethylene glycol, alkylene glycol, polyalkylene glycol, silicone oil, or a mixture thereof is employed. Further, in order to effectively obtain a vibration isolation effect based on the fluid flow action described later, the incompressible fluid sealed in the first and second fluid chambers 42 and 44 has a low viscosity of 0.1 Pa · s or less. A fluid is desirable.

  A first orifice member 46 is disposed in the first fluid chamber 42. The first orifice member 46 has a curved plate shape extending in the circumferential direction of the intermediate cylinder member 14, and both end portions in the length direction are fitted into one of the fitting grooves 24 and 24 of the intermediate cylinder member 14. In addition, an intermediate portion in the length direction extends across the first fluid chamber 42 in the circumferential direction. Further, the first orifice member 46 is formed with a first circumferential groove 48 that extends in the circumferential direction while opening on the outer peripheral surface, and one end of the first circumferential groove 48 is formed on the first orifice member 46. The other end portion opens to the inner peripheral surface of the first orifice member 46 through the first through hole 50 penetrating the first orifice member 46.

  A second orifice member 52 is disposed in the second fluid chamber 44. The second orifice member 52 has a plane symmetrical shape with respect to the first orifice member 46, and a second circumferential groove 54 corresponding to the first circumferential groove 48 in the first orifice member 46 is formed. At the same time, a second communication hole 56 corresponding to the first series of through holes 50 is formed through the second orifice member 52 and connected to the second circumferential groove 54.

  Then, both ends of the first orifice member 46 and the second orifice member 52 are inserted into the fitting grooves 24 and 24 of the intermediate cylinder member 14, and between the radial directions of the intermediate cylinder member 14 and the outer cylinder member 20. It is sandwiched and supported in the radial direction. In this arrangement state, the first circumferential groove 48 of the first orifice member 46 and the second circumferential groove 54 of the second orifice member 52 are connected in the circumferential direction, and the first and second orifice members 46 are also connected. , 52 are fluidly superimposed on the outer cylinder member 20 via the seal rubber layer 40, and the outer peripheral openings of the first and second circumferential grooves 48, 54 are closed by the outer cylinder member 20. As a result, an orifice passage 58 communicating with the first fluid chamber 42 and the second fluid chamber 44 is formed in the first and second orifice members 46 and 52, and the length is less than one round in the circumferential direction. It extends in. The orifice passage 58 adjusts the ratio of the passage cross-sectional area and the passage length while considering the wall spring rigidity of the first and second fluid chambers 42 and 44, thereby adjusting the tuning frequency, which is the resonance frequency of the fluid flow. Is suitably set, and is tuned to a low frequency corresponding to, for example, an engine shake, or a medium to high frequency corresponding to idling vibration or running-over noise.

  The engine mount 10 having such a structure uses the fluid-filled cylindrical vibration isolator manufacturing apparatus 60 shown in FIG. 3 to seal the incompressible fluid into the first and second fluid chambers 42 and 44. While adjusting the amount, the outer cylinder member 20 is attached to the intermediate cylinder member 14 by the reduced diameter, and the main rubber elastic body 16 is pre-compressed. The manufacturing apparatus 60 includes a lower pressing body 62, a reduced diameter processing portion 77, and an upper pressing body 108 which will be described later. Below, the manufacturing method of the engine mount 10 is demonstrated with the structure of the manufacturing apparatus 60 of the engine mount 10. FIG.

  First, the first and second orifice members 46 and 52 prepared in advance are attached to the outer peripheral surface of the vulcanized product 18 prepared in advance, and the outer cylinder member 20 is extrapolated to the vulcanized product 18. These are set on the lower pressing body 62 of the manufacturing apparatus 60.

  The lower pressing body 62 includes a lower jig 64, and the lower jig 64 includes a plurality of contact protrusions 68 protruding upward from the outer peripheral end portion of the base portion 66 having a substantially disk shape. , And a positioning pin 70 protruding upward from the radial central portion of the base 66. A fixing portion 72 is connected to the lower side of the lower jig 64, and the fixing portion 72 is fixed in an inserted state of an annular holding body 74, and the holding body 74 is connected to the rotary table 76. The rotation direction of the lower jig 64 connected to the fixed portion 72 can be adjusted by rotating the rotary table 76 in the circumferential direction. Then, the vulcanized product 18 is brought close to the lower jig 64 from above, and the positioning pin 70 is inserted into the inner shaft member 12 of the vulcanized product 18 so that the vulcanized product 18 is pressed to the lower pressing body. Position and set in a direction perpendicular to the axis with respect to 62. Furthermore, the lower surface of the outer cylindrical member 20 that is externally inserted into the vulcanized molded product 18 is abutted and supported by the upper surface of the holding body 74 so that the outer cylindrical member 20 is positioned at a predetermined axial position relative to the vulcanized molded product 18. The lower pressing body 62 is set while being positioned and held.

  Further, the reduced diameter processed portion 77 is set in an extrapolated state with respect to the vulcanized molded product 18 and the outer cylindrical member 20 set in the lower pressing body 62. As shown in FIG. 4, the diameter reducing portion 77 includes a plurality of drawing dies 78 arranged on the outer periphery of the outer cylinder member 20.

  The aperture die 78 is a highly rigid block body that has a substantially sector shape when viewed in the vertical direction, and a plurality of apertures are arranged side by side in the circumferential direction, and a through-hole extending in the vertical direction is formed in the radial center portion. The outer peripheral surface is a tapered outer peripheral surface 80 that inclines toward the inner periphery as it goes upward. As shown in FIGS. 3 to 5, a sliding protrusion 82 is fixed to the aperture die 78. The sliding protrusion 82 has a rod-like shape extending in a vertical direction with a cross-sectional shape gradually narrowing toward the intermediate portion in the radial direction, and the inner peripheral side of the narrowest width portion is the outer peripheral surface of the diaphragm die 78. It is fitted into a fitting groove 84 formed in the central portion in the circumferential direction and screwed to the drawing die 78.

  Further, the aperture die 78 is disposed so as to be slidable with respect to the pressurizing portion 86 disposed on the outer peripheral side. The pressurizing portion 86 has an inner peripheral surface which is a tapered inner peripheral surface 88 corresponding to the tapered outer peripheral surface 80, and is inclined in a radial direction at a position corresponding to the circumferential central portion of each drawing die 78. On the other hand, a guide groove 90 extending vertically is formed so as to open on the inner peripheral surface. The outer peripheral side of the narrowest width portion of the sliding protrusion 82 is fitted into the guide groove 90 of the pressurizing portion 86, and the sliding protrusion 82 is guided by the guide groove 90, whereby the drawing die 78. Is slidable up and down with respect to the pressurizing portion 86. Further, since the inner peripheral surface of the pressurizing portion 86 is a tapered inner peripheral surface 88 that inclines toward the inner periphery as it goes upward, the diaphragm die 78 is displaced upward with respect to the pressurizing portion 86 and at the same time. Displacement to the circumference.

  Furthermore, upper and lower displacement restricting portions 92 and 94 each having a substantially annular plate shape are provided on the upper and lower sides of the pressurizing portion 86, and the inner periphery of the pressurizing portion 86 is more inward than the tapered inner peripheral surface 88. Since the protruding displacement restricting portions 92 and 94 are fixed to the pressurizing portion 86, the diaphragm die 78 is prevented from coming off with respect to the pressurizing portion 86. The lower displacement restricting portion 94 includes a through hole having a size that allows the holding body 74 to be inserted vertically.

  Then, as shown by the arrow in FIG. 5, the pressurizing portion 86 is displaced downward by an actuator (not shown), and the pressurizing portion 86 is arranged on the outer periphery of the outer cylinder member 20, and the holding body 74 is provided on the lower surface of the aperture die 78. The diaphragm die 78 is pushed between the pressure member 86 and the outer cylindrical member 20 by moving the diaphragm die 78 relative to the pressure member 86 upward. As a result, as shown in FIG. 3, the inner peripheral surface of the drawing die 78 pressed radially inward by the tapered inner peripheral surface 88 of the pressurizing portion 86 is pressed against the outer peripheral surface of the outer cylinder member 20. The cylindrical member 20 is reduced in diameter by a plurality of drawing dies 78. The diaphragm die 78 is biased downward by a spring means such as a coil spring or a cylinder-piston structure using a compressive fluid, and the displacement of the pressurizing portion 86 by the actuator is released. May be moved more reliably to the initial position of the lower end.

  By performing the diameter reducing process of the outer cylindrical member 20 in an incompressible fluid, the annular fitting portions 26 and 26 of the intermediate cylindrical member 14 and the outer cylindrical member 20 are brought into close contact with each other via the seal rubber layer 40. At the same time as the first and second fluid chambers 42 and 44 are defined, an incompressible fluid is sealed in the first and second fluid chambers 42 and 44. Further, the outer cylinder member 20 is further reduced in diameter even after the intermediate cylinder member 14 and the outer cylinder member 20 are brought into close contact with each other via the seal rubber layer 40 and the first and second fluid chambers 42 and 44 are sealed. Thus, the main rubber elastic body 16 is pre-compressed in the radial direction.

  The diameter reducing process of the outer cylinder member 20 in which the diameter of the outer cylinder member 20 is reduced by such a drawing die 78 is performed on the lower side wall 34 of the main rubber elastic body 16 as shown in FIG. While the tool 64 is brought into contact, the upper jig 96 is pressed against the upper axial wall 32 of the main rubber elastic body 16. In the manufacturing method of the engine mount 10 of the present embodiment, first, the vulcanized molded product 18, the first and second orifice members 46 and 52, and the outer cylinder member 20 are set on the lower pressing body 62, and the lower The lower jig setting step of bringing the side jig 64 into contact with the lower axial wall 34 of the main rubber elastic body 16 is completed. Next, an upper pressing body 108 (to be described later) is brought close to the vulcanized molded product 18 set on the lower pressing body 62, and the intermediate cylinder member 14 and the outer cylinder member 20 are placed between the upper pressing body 108 and the holding body 74. The upper jig setting step of holding the upper jig 96 against the upper axial direction wall 32 of the main rubber elastic body 16 is completed. Thereafter, the diameter reduction process of reducing the diameter of the outer cylindrical member 20 with the drawing die 78 is completed, and the engine mount 10 is obtained.

  As shown in FIGS. 6 to 8, the upper jig 96 that is a jig for manufacturing a fluid-filled cylindrical vibration isolator has a structure in which a plurality of pressing protrusions 100 are provided on the lower surface of the annular base portion 98. Have. The annular base portion 98 has a ring shape extending with a substantially constant cross-sectional shape, and screw holes 102 that are threaded on the inner surface and penetrate vertically are formed on both sides in one radial direction. .

  The pressing protrusion 100 is formed integrally with the annular base portion 98, and protrudes downward from the lower surface, which is the inner surface in the axial direction of the annular base portion 98, at a plurality of locations in the circumferential direction of the annular base portion 98. Further, the pressing protrusion 100 is a curved surface whose protruding tip surface is curved in the radial direction, and has a maximum protruding dimension at the radially intermediate portion, and is inclined upward as it goes to the inner periphery and outer periphery. . In the pressing protrusion 100 of the present embodiment, the inner peripheral end of the lower surface that is the protruding tip surface and the lower end of the inner peripheral surface are smoothly continuous in a curved shape, and the outer peripheral end of the lower surface and the lower end of the outer peripheral surface are curved. The inner and outer peripheral ends of the lower surface have a surface shape with no edges. Further, the pressing protrusion 100 is a plane in which both end faces in the circumferential direction extend substantially parallel to the radial direction, and becomes narrower in the circumferential direction as it goes to the inner peripheral side. Furthermore, the pressing protrusion 100 has a curved surface shape at the connecting portion between the circumferential end surfaces and the bottom surface, and has a continuous surface shape with no broken line-like edges at the connecting portion. In the present embodiment, the outer peripheral surface of the pressing protrusion 100 is located on the inner periphery of the outer peripheral surface of the annular base portion 98, and the annular base portion 98 is described later on the outer peripheral side of the pressing protrusion 100. It protrudes below the contact portion 106.

  Further, in this embodiment, three pressing protrusions 100 are formed on both sides in the circumferential direction with respect to the screw hole 102, and three on one side thereof are formed at substantially equal intervals at a predetermined distance in the circumferential direction. In addition, the pressing protrusions 100, 100 on both sides sandwiching the formation portions of the screw holes 102, 102 are arranged far apart in the circumferential direction.

  Furthermore, each pressing protrusion 100 is formed with a through-hole 104 penetrating vertically. The through-hole 104 has a substantially constant circular cross section and linearly extends up and down and passes through the upper jig 96. One end of the through-hole 104 opens on the lower surface of the pressing protrusion 100 and the other end. The portion is open on the upper surface of the annular base portion 98. In FIG. 6, some of the through holes 104 are blocked, but this is only experimentally blocked for the purpose of confirming the effect of the through holes 104.

  Further, non-contact portions 106 are formed between the circumferential directions of the plurality of pressing protrusions 100, respectively. The non-contact portion 106 has a lower protrusion height from the annular base portion 98 than the pressing protrusion 100. In this embodiment, the non-contact portion 106 has a protrusion height from the annular base portion 98. The non-contact portion 106 is formed of an annular base portion 98. Further, the two non-contact portions 106a and 106a in which the screw holes 102 and 102 are formed have a larger width in the circumferential direction than the other four non-contact portions 106b, 106b, 106b, and 106b. The circumferential width of the main rubber elastic body 16 is larger than that of the connecting arm portions 36 and 36 of the main rubber elastic body 16.

  The upper jig 96 having such a structure constitutes a lower end portion of the upper pressing body 108 that can be displaced vertically. The upper pressing body 108 has a structure in which a jig holding part 110 that holds the upper jig 96 and a connecting part 112 that connects the jig holding part 110 and an actuator (not shown) are connected to each other so as to be relatively tiltable. Yes. The jig holding portion 110 has a bottomed cylindrical shape in the opposite direction, and has a liquid discharge hole 114 penetrating the peripheral wall portion in the radial direction, and extends in the axial direction to form the liquid discharge hole 114. Communication holes 116 that communicate with the through holes 104 of the upper jig 96 are formed at a plurality of locations on the circumference. Furthermore, the jig holding part 110 is formed with a bolt hole 118 penetrating the peripheral wall part in the axial direction, and the connecting bolt 120 inserted into the bolt hole 118 is screwed into the screw hole 102 of the upper jig 96. As a result, the upper jig 96 is fixed to the jig holding portion 110.

  The outer cylinder member is pressed with the upper jig 96 fixed to the jig holding part 110 by the downward movement of the upper pressing body 108 against the upper surface of the upper axial wall 32 of the main rubber elastic body 16. 20 is reduced in diameter by a drawing die 78. The upper jig 96 is a pressing protrusion 100 in which a plurality of contact portions with the upper axial wall portion 32 are provided in the circumferential direction, and the upper jig 96 passes the upper axial wall portion 32 in the circumferential portion. In general, it is pressed at a plurality of locations. The upper jig 96 has non-contact portions 106a, 106a formed with screw holes 102, 102 positioned in the circumferential direction with respect to the connecting arm portions 36, 36 of the main rubber elastic body 16, and is pressed. The protrusion 100 is disposed at a position above the connecting arm portions 36 and 36 in the circumferential direction.

  In the present embodiment, the incompressible fluid between the main rubber elastic body 16 and the upper jig 96 is discharged to the outside by the through hole 104 of the upper jig 96, the liquid discharge hole 114 and the communication hole 116 of the upper pressing body 108. Therefore, the pressing protrusion 100 of the upper jig 96 can be easily pressed against the upper axial wall 32 of the main rubber elastic body 16.

  Thus, the outer cylindrical member 20 is reduced in diameter while pressing the pressing protrusion 100 of the upper jig 96 and the contact protrusion 68 of the lower jig 64 against the upper and lower end surfaces of the main rubber elastic body 16. Thus, the volume of the first and second fluid chambers 42 and 44 can be adjusted by limiting the amount of deformation of the axial wall portions 32 and 34 of the pocket portions 30 in the upward and downward directions. Therefore, it is possible to efficiently obtain an anti-vibration effect or the like based on the flow action of the fluid flowing through the orifice passage 58 with respect to the radial vibration input in which the first and second fluid chambers 42 and 44 are arranged. it can.

  Further, in the present embodiment, the outer cylinder member 20 comes into fluid tight contact with the annular fitting portions 26 and 26 of the intermediate cylinder member 14 via the seal rubber layer 40, and the first and second fluid chambers 42 and 44 are formed. Even after the sealing is formed, the outer cylinder member 20 is further reduced in diameter. Here, the non-contact part 106 provided between the circumferential directions of the pressing protrusions 100 in the upper jig 96 is such that the pressing protrusions 100 partially contact the upper surface of the upper axial wall part 32 in the circumferential direction. In this state, the upper axial direction wall portion 32 is separated from the upper side and is not in contact.

  As a result, when the diameter of the outer cylinder member 20 is further reduced after the first and second fluid chambers 42 and 44 are hermetically sealed, as shown in FIGS. The bulging deformation of the direction wall portion 32 in the axially outward direction is allowed between the circumferential directions of the pressing protrusion 100. Thereby, the volume change of the first and second fluid chambers 42 and 44 filled with the incompressible fluid is allowed to some extent by the elastic deformation of the upper axial wall 32, and the diameter of the outer cylinder member 20 is reduced. It is possible to prevent the internal pressure of the first and second fluid chambers 42 and 44 sealed at the time of processing from significantly increasing. Therefore, the outer cylinder member 20 can be reduced in diameter with a relatively small force, and the outer cylinder member 20 can be easily reduced in diameter with accuracy, and the pressing portion 86 can be directed downward. As an actuator (not shown) that moves and applies a radially inward force to the aperture die 78, it is possible to adopt a small actuator with a small generated force. 9 and 10, the upper axial wall portion 32 before the bulging deformation is indicated by a two-dot chain line and a bulging indicated by a solid line so that the bulging deformation of the upper axial wall portion 32 can be easily understood. The deformed upper axial wall 32 is shown with exaggerated deformation. FIG. 10 is a diagram schematically showing a developed portion of the contact portion between the upper jig 96 and the upper axial wall portion 32, and the left-right direction in the drawing is the circumferential direction.

  In particular, the first and second fluid chambers 42 and 44 have a structure in which inner and outer peripheral wall portions are not substantially deformed, and at least one of the inner and outer peripheral wall portions is a flexible film. It is not an equilibrium chamber that is configured to allow volume changes. When manufacturing the engine mount 10 having the first and second fluid chambers 42 and 44 having such a structure, the upper axial wall of the main rubber elastic body 16 is formed by the upper jig 96 provided with the non-contact portion 106. By pressing the portion 32, it is possible to suppress an increase in internal pressure of the first and second fluid chambers 42 and 44 during the diameter reduction processing of the outer cylinder member 20.

  Further, in the upper jig 96 of the present embodiment, the pair of non-contact portions 106a, 106a formed with the screw holes 102, 102 have a circumferential width larger than the other non-contact portions 106b. The wide non-contact portions 106a, 106a are aligned with the pair of connecting arm portions 36, 36 in the main rubber elastic body 16 in the circumferential direction. As a result, the upper jig 96 presses the main rubber elastic body 16 (upper axial wall portion 32) at a position away from the formation portion of the pair of connecting arm portions 36, 36 in the circumferential direction. Directly pressing the pair of connecting arm portions 36, 36 is prevented. Therefore, it is possible to prevent the pair of connecting arm portions 36, 36 from being compressed unnecessarily large in the axial direction, thereby improving the durability of the main rubber elastic body 16 and realizing the desired spring characteristics. In addition, the main rubber elastic body 16 is sufficiently precompressed in the radial direction by the diameter reduction processing of the outer cylindrical member 20 by preventing the pair of connecting arm portions 36, 36 from being greatly compressed in the axial direction.

  Further, in the present embodiment, the contact protrusion 68 of the lower jig 64 contacts the lower axial wall 34 of the main rubber elastic body 16 over the entire circumference and the pressing protrusion of the upper jig 96. The portion 100 partially presses the upper axial wall portion 32 of the main rubber elastic body 16 in the circumferential direction. Therefore, while adjusting the volume of the first and second fluid chambers 42 and 44 with high accuracy, the volume change of the first and second fluid chambers 42 and 44 during the diameter reduction processing of the outer cylinder member 20 is increased. The outer cylindrical member 20 can be easily reduced in diameter by allowing the axial wall portion 32 to bulge and deform.

  Furthermore, in this embodiment, the pressing protrusions 100 that are intermittently provided in the circumferential direction have a protruding tip surface (lower surface) smoothly connected to the circumferential side surfaces with a curved surface shape. The lower end of the edge has a smooth surface shape with no edge. As a result, even if the pressing protrusion 100 is pressed against the main rubber elastic body 16, the stress due to contact is dispersed and applied to prevent the contact portion of the pressing protrusion 100 from cracking. be able to.

  11 and 12, an upper jig 130 is shown as a second embodiment of a jig for manufacturing a fluid-filled cylindrical vibration isolator according to the present invention. In the following description, members and portions that are substantially the same as those of the first embodiment are denoted by the same reference numerals in the drawings, and the description thereof is omitted. The specific structure of the fluid-filled cylindrical vibration isolator including the upper jig 130 and the specific structure of the fluid-filled cylindrical vibration damper manufactured using the upper jig 130 are described in the first embodiment. The thing similar to can be employ | adopted.

  More specifically, the upper jig 130 has a structure in which a plurality of pressing protrusions 100 and non-contact portions 106 are formed on the annular base portion 98.

  A plurality of pressing protrusions 100 are provided apart from each other in the circumferential direction, and in this embodiment, eight pressing protrusions 100 are arranged substantially evenly in the circumferential direction. Further, the screw holes 102 and 102 formed in the annular base portion 98 are formed so as to reach the inside of the two pressing protrusions 100 and 100 provided at positions opposed in the radial direction, and the screw holes 102 and 102 are formed. It opens only on the upper surface of the annular base 98 without penetrating the upper jig 130.

  Since the non-contact portion 106 has the pressing protrusions 100 arranged substantially evenly in the circumferential direction, the circumferential width is substantially constant, and linearly extends with a substantially constant width in the radial direction. Yes. In short, the non-contact part 106 of this embodiment has the same structure as the non-contact part 106b of the first embodiment.

  According to the upper jig 130 having such a structure according to the present embodiment, the upper surface of the upper axial wall 32 of the main rubber elastic body 16 when the outer cylindrical member 20 is reduced in diameter as in the first embodiment. Can be allowed to be allowed to bulge upward by the non-contact portion 106 while being partially pressed in the circumferential direction by the plurality of pressing protrusions 100. Accordingly, the volumes of the first and second fluid chambers 42 and 44 can be adjusted and set, and the outer cylinder member 20 can be further reduced in diameter even after the first and second fluid chambers 42 and 44 are sealed. Can do.

  In addition, since the upper jig 130 of the present embodiment has a larger number of pressing protrusions 100 than the upper jig 130 of the first embodiment, the first and second fluid chambers 42 and 44 have different numbers. The volume can be adjusted and set more accurately. If the circumferential width of the pressing protrusion 100 is increased, the volume of the first and second fluid chambers 42 and 44 can be adjusted and set with high accuracy without increasing the number of pressing protrusions 100. On the other hand, if the number of pressing protrusions 100 is reduced or the circumferential width of the pressing protrusions 100 is reduced, the outer cylinder member 20 is further contracted even after the first and second fluid chambers 42 and 44 are sealed. It can be easily deformed in diameter.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, the number and arrangement of the pressing protrusions 100 formed on the upper jig 96 are merely examples, and are not particularly limited. Furthermore, the number of the drawing dies 78 and the specific structure of the manufacturing apparatus 60 that performs diameter reduction processing are not limited to those described in the embodiment, and may be changed as appropriate.

  In said 1st embodiment, about the aspect which presses the upper axial direction wall part 32 of the pocket parts 30 and 30 in the main body rubber elastic body 16 with the upper side jig | tool 96 provided with the press protrusion 100 and the non-contact part 106. FIG. As described above, for example, the lower axial wall 34 is partially pressed in the circumferential direction by the lower jig as a manufacturing jig having a structure in which the upper jig 96 is turned upside down, and the lower axial direction The wall portion 34 can be partially allowed to bulge and deform downward. In short, when the outer cylinder member 20 is reduced in diameter, at least one of the upper axial wall portion 32 and the lower axial wall portion 34 is partially pressed in the circumferential direction, and outward in other circumferential portions. It is only necessary to allow the bulging deformation.

  The specific structure of the fluid-filled cylindrical vibration isolator can also be appropriately changed according to required characteristics. Specifically, for example, in the above-described embodiment, the sealed region is configured by the two fluid chambers 42 and 44 formed on both sides in one radial direction, but the four fluid chambers are orthogonal to each other as the sealed region. Manufacturing a fluid-filled cylindrical vibration isolator having a structure that is formed on both sides in two radial directions and has a structure that exhibits a vibration isolation effect due to fluid flow action against vibration in two radial directions A method, a manufacturing jig, or a manufacturing apparatus can also be applied.

  In the above embodiment, the outer cylinder member 20 is formed with a substantially constant diameter over the entire length. For example, an outer cylinder member having a structure in which the central portion in the axial direction is larger in diameter than both ends in the axial direction. The present invention is also applicable to the fluid-filled cylindrical vibration isolator provided. In that case, the outer cylinder member may be uniformly reduced in diameter as a whole, but, for example, after both ends in the axial direction of the outer cylinder member are reduced in diameter and the incompressible fluid is sealed in the sealing region. The diameter of the axially intermediate portion of the outer cylinder member may be further reduced.

  In addition, the protrusion height of the pressing protrusion 100 of the upper jig 96 (depth of the non-contact portion 106) is adjusted so that the upper axial direction wall portion 32 is deformed in the axial direction when the upper axial direction wall portion 32 bulges outward. The wall portion 32 may be in contact with the non-contact portion 106. According to this, the amount of outward deformation of the upper axial direction wall portion 32 can be limited, and for example, the limit setting of the diameter reduction processing amount of the outer cylindrical member 20 can be made possible.

10: Engine mount (fluid-filled cylindrical vibration isolator), 12: Inner shaft member, 14: Intermediate cylindrical member, 16: Main rubber elastic body, 18: Vulcanized molded product, 20: Outer cylindrical member, 26: Annular Fitting part, 28: window part, 30: pocket part, 32: upper axial wall part (axial wall part of the pocket part on the other axial side), 34: lower axial wall part (one axial side) , 36: connecting arm portion, 42: first fluid chamber (enclosed region), 44: second fluid chamber (enclosed region), 60: manufacturing apparatus (fluid-sealed cylindrical shape) Vibration isolator manufacturing apparatus), 96, 130: upper jig (manufacturing jig for fluid-filled cylindrical vibration isolator), 98: annular base part, 100: pressing protrusion, 106: non-contact part

Claims (6)

An outer cylinder member is fitted and fixed to a vulcanized molded product in which an intermediate cylinder member is arranged on the outer periphery of the inner shaft member and is connected by a main rubber elastic body, and is passed through a window provided in the intermediate cylinder member. A manufacturing method of a fluid-filled cylindrical vibration damping device in which the opening of the pocket portion of the main rubber elastic body that opens to the outer peripheral surface is covered with the outer tube member to form an incompressible fluid sealing region. ,
The outer cylinder member extrapolated to the vulcanized molded product is reduced in diameter in the incompressible fluid, and the outer cylinder member is inserted into the annular fitting portions provided on both axial sides of the intermediate cylinder member. When the sealing region in which the incompressible fluid is sealed is hermetically formed by fluidly fitting and fixing the axially opposite side portions,
The volume of the pocket portion is adjusted and set by pressing the axial wall portion of the pocket portion of the main rubber elastic body partially from the outside on the periphery, and is not pressed from the outside on the periphery. The outer cylinder is further allowed after the outer cylinder member is allowed to fluidly contact the annular fitting portion and the sealed region is sealed by allowing the axial wall portion to bulge outward in the portion. A method for manufacturing a fluid-filled cylindrical vibration damping device, wherein the member is reduced in diameter. The main rubber elastic body is formed with a pair of pocket portions on both sides in a direction perpendicular to the axis, and the pair of pocket portions are respectively passed through a pair of window portions provided on both sides in the direction perpendicular to the axis of the intermediate cylinder member. While connecting to the circumferential surface of the pair of pocket portions in the main rubber elastic body, a connecting arm portion for connecting the inner shaft member and the intermediate cylindrical member in the direction perpendicular to the axis is provided while opening on the outer peripheral surface. When manufacturing the fluid-filled vibration isolator having the structure as described above by sealingly forming the sealed region according to the manufacturing method according to claim 1,
2. The fluid-filled tubular cylinder prevention device according to claim 1, wherein the connecting arm portion of the main rubber elastic body is pressed from the outside in a circumferential direction so that the connecting arm portion is not directly pressed in the axial direction. A method of manufacturing a vibration device.   When the sealing region is hermetically formed, the pocket portion on the other side in the axial direction in a state where the axial wall portion of the pocket portion on one side in the axial direction of the main rubber elastic body is abutted and supported from the outside. The method for manufacturing a fluid-filled cylindrical vibration isolator according to claim 1 or 2, wherein the axial wall portion of the fluid is partially pressed from the outside on the circumference. An outer cylinder member is fitted and fixed to a vulcanized molded product in which an intermediate cylinder member is arranged on the outer periphery of the inner shaft member and is connected by a main rubber elastic body, and is passed through a window provided in the intermediate cylinder member. In the manufacturing process of the fluid-filled cylindrical vibration damping device in which the opening of the pocket portion of the main rubber elastic body that opens to the outer peripheral surface is covered with the outer tubular member to form a sealed region for the incompressible fluid, The outer cylinder member extrapolated to the vulcanized product is reduced in diameter in the incompressible fluid, and the shaft of the outer cylinder member is inserted into the annular fitting portions provided on both axial sides of the intermediate cylinder member. A jig for manufacturing a fluid-filled cylindrical vibration isolator used for sealingly forming the sealed region where the incompressible fluid is sealed by fluidly fitting and fixing both sides in the direction,
The annular base portion has an annular base portion that is extrapolated from the axial end portion with respect to the inner shaft member, and an axial inner surface of the annular base portion that faces the main rubber elastic body projects in the axial direction. In the main rubber elastic body, a pressing protrusion that is brought into contact with the axial wall portion of the pocket portion from the outside, and the axial direction of the pressing protrusion even in a contact state with the axial wall portion of the pocket portion A jig for manufacturing a fluid-filled cylindrical vibration isolator, wherein a non-contact portion that is not in contact with a wall portion is provided at a different position in the circumferential direction.   An edgeless surface in which the pressing protrusions are connected with a smooth curved surface shape to both side surfaces in the circumferential direction rising in the protruding direction from the annular base portion at both circumferential edges of the annular base portion on the protruding tip surface The jig for manufacturing a fluid-filled cylindrical vibration isolator according to claim 4, which is shaped. An outer cylinder member is fitted and fixed to a vulcanized molded product in which an intermediate cylinder member is arranged on the outer periphery of the inner shaft member and is connected by a main rubber elastic body, and is passed through a window provided in the intermediate cylinder member. When manufacturing a fluid-filled cylindrical vibration damping device in which the opening of the pocket portion of the main rubber elastic body that opens to the outer peripheral surface is covered with the outer tube member to form a sealed region for an incompressible fluid, The outer cylinder member extrapolated to the vulcanized product is reduced in diameter in the incompressible fluid, and the shaft of the outer cylinder member is inserted into the annular fitting portions provided on both axial sides of the intermediate cylinder member. An apparatus for manufacturing a fluid-filled cylindrical vibration isolator that seals and forms the sealed region in which the incompressible fluid is sealed by fluidly fitting and fixing both sides in the direction,
A pressing protrusion that is brought into contact with the axial wall portion of the pocket portion of the main rubber elastic body from the outside and press-deforms the axial wall portion inward in the axial direction, and the axial direction of the pocket portion Non-contact portions that are not in contact with the wall portion and allow outward bulging deformation due to the internal pressure of the enclosed region in the axial wall portion are provided at different positions in the circumferential direction. An apparatus for manufacturing a fluid-filled cylindrical vibration isolator characterized by the above.