JP2005098331A - Fluid enclosed type vibration damper and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid enclosed type vibration damper, firmly and stably externally fixing a second cylindrical fixture to a metallic sleeve applied to the outer peripheral surface of a body rubber elastic substance, and covering a pocket part opened in the outer peripheral surface of the body rubber elastic substance through a window part provided in the metallic sleeve in a simple structure with stable sealing ability to attain excellent fluid tightness of the enclosed fluid. <P>SOLUTION: In this device, the metallic sleeve 24 is so constructed that first and second annular bodies 30, 32 are connected to each other in a suitable number of portions in the circumferential direction by two or more connectors 34. At least one of the first annular body 30 and the second annular body 32 is provided with a reinforcement rib 44 extended in the circumferential direction at least on one axial end part, and the connectors 34 are provided with recess parts 38, 38 projected to be curved or bent toward the inner peripheral side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fluid-filled vibration isolator that obtains a vibration-proof effect based on the flow action of an incompressible fluid enclosed therein, and particularly to any two-direction input vibration orthogonal to each other. The present invention relates to a fluid-filled vibration isolator that exhibits an effective vibration isolating effect based on the flow action of an incompressible fluid and can be suitably used for, for example, an automobile engine mount.

  Conventionally, as a type of vibration isolator as an anti-vibration coupling body or an anti-vibration support body interposed between members constituting a vibration transmission system, a flow such as a resonance action of an incompressible fluid enclosed inside 2. Description of the Related Art A fluid-filled vibration isolator that obtains a vibration isolating effect based on an action is known. Moreover, in the vibration isolator, there is a case where a vibration isolating effect is required for vibrations input in a plurality of directions. For example, in an engine mount for automobiles, engine shake and idling vibration are input in various directions according to the arrangement of the engine mount with respect to the power unit, etc., and both good riding comfort and stable driving stability are compatible. For this purpose, different spring characteristics are required in various directions.

  Therefore, in view of such required characteristics, conventionally, as shown in Patent Document 1, in each of three directions orthogonal to each other, the vibration isolation effect based on the fluid flow action is exhibited. In addition, there has been proposed a fluid-filled vibration isolator having a structure in which the vibration isolating effect exhibited based on the fluid flow action in these three directions can be individually tuned.

  Such a fluid-filled vibration isolator having a conventional structure separates a large-diameter cylindrical second mounting bracket attached to a vehicle body radially outward from a rod-shaped first mounting bracket attached to a power unit. Two pairs of working fluid chambers in which relative pressure fluctuations are generated when vibration is input in a direction perpendicular to the axis in a rubber mount in which the first mounting bracket and the second mounting bracket are connected by a rubber elastic body. And a fluid flow action through a first orifice passage that forms a pressure receiving chamber and an equilibrium chamber, respectively, in which relative pressure fluctuations are generated when axial vibration is input, and communicates two pairs of working fluid chambers; Based on the fluid flow action through the second orifice passage that allows the pressure receiving chamber and the equilibrium chamber to communicate with each other, any effective vibration isolation effect is produced against vibrations input in three orthogonal directions. It is adapted to be.

  By the way, in such a fluid-filled vibration isolator, the manufacturing operation including sealing of the incompressible fluid into the two pairs of working fluid chambers is facilitated, and the sealing performance of the working fluid chambers is advantageously ensured. For this reason, as shown in Patent Document 1, generally, two rubber pockets are formed in the outer peripheral surface of the main rubber elastic body fixed to the first mounting bracket, and the main rubber is formed. A metal sleeve is vulcanized and bonded to the outer peripheral surface of the elastic body, and the pocket recesses are opened to the outer peripheral surface through a plurality of windows provided in the metal sleeve, while the second mounting bracket is fitted and fixed to the metal sleeve. Thus, a structure in which two intended pairs of working fluid chambers are formed by covering the pocket recesses is employed.

  However, in the case of such a conventional structure, it is necessary to form a relatively large window portion in the metal sleeve, which causes a large difference in rigidity between the respective parts with respect to the metal sleeve. The metal sleeve is easily deformed in the manufacturing process of the apparatus, and this causes a problem that it is difficult to stably obtain a sealing property between the metal sleeve and the second mounting bracket.

  In other words, in order to improve the durability of the main rubber elastic body, after the vulcanization molding of the main rubber elastic body, the metal sleeve attached to the outer peripheral surface thereof is subjected to diameter reduction processing such as drawing to make the main rubber elastic body elastic. It is desirable to apply pre-compression to the body, and in order to obtain excellent fluid tightness, it is sufficient for the second mounting bracket that is extrapolated to the metal sleeve attached to the outer peripheral surface of the main rubber elastic body. It is desirable to reduce the diameter so that the second mounting bracket is firmly attached to the metal sleeve with a seal rubber layer interposed as necessary. However, if the metal sleeve or the second mounting bracket is subjected to sufficient diameter reduction processing, in the metal sleeve, in particular, a window portion is formed, and a portion and a window portion that are divided on both sides in the axial direction are not formed. As a result, there is a problem that a local distortion occurs between the axially continuous portion and a gap is likely to occur between the fitting surface of the metal sleeve and the second mounting bracket in such a portion. is there.

  In order to deal with such a problem, for example, as shown in Patent Document 2, the metal sleeve is configured by a pair of independent band-shaped rings, and any one of the pair of independent band-shaped rings is provided. It is also conceivable to form a notched window. In this way, the metal sleeve is composed of a pair of independent band-shaped ring bodies, and by eliminating the axially continuous portion of the metal sleeve, the rigidity of the metal sleeve is made substantially constant in the circumferential direction, resulting in local stress concentration. Since the deformation can be suppressed, it is considered that there is a certain effect in reducing the sealing performance due to the local deformation of the metal sleeve.

  However, when trying to configure the metal sleeve with a pair of independent band-shaped annular members arranged in the axial direction, the number of parts at the time of manufacturing the fluid-filled vibration isolator increases and the manufacturing work becomes troublesome. When extrapolating and fixing the second mounting bracket to the metal sleeve, it becomes difficult to position and set the pair of belt-shaped annular bodies accurately in the axial direction. It will be triggered by. In order to accurately position the pair of band-shaped rings in the axial direction, for example, a separately formed member may be fitted between the pair of band-shaped rings, but the number of parts is further increased and the manufacturing is performed. This is not realistic because it further complicates the process.

JP 2001-349369 A JP 2002-21914 A

  Here, the present invention has been made in the background as described above, and the problem to be solved is a cylindrical shape with respect to the metal sleeve attached to the outer peripheral surface of the main rubber elastic body. The second mounting bracket can be firmly and stably fitted and fixed, and the pocket formed in the outer peripheral surface of the main rubber elastic body through the window provided in the metal sleeve has a simple structure and stability. An object of the present invention is to provide a fluid-filled vibration isolator having a novel structure that can be covered with a high sealing property and is excellent in fluid tightness of a sealed fluid.

  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. In addition, aspects or technical features of the present invention are not limited to those described below, but are described in the entire specification and drawings, or can be understood by those skilled in the art from those descriptions. It should be understood that it is recognized on the basis of.

  According to a first aspect of the present invention, a main rubber elastic body connects a first mounting member and a metal sleeve spaced apart on the outer peripheral side of the first mounting member, and at least provided in the main rubber elastic body. By opening two pocket recesses on the outer peripheral surface through a plurality of windows provided in the metal sleeve and externally fixing the cylindrical second mounting member to the metal sleeve, the rubber elasticity of the main body At least two working fluid chambers are provided inside the body, and the working fluid chambers are communicated with each other by a first orifice passage, and the second mounting member is externally fitted and fixed to the metal sleeve. One opening in the axial direction of the mounting member is fluid-tightly closed with the main rubber elastic body, and the other opening in the axial direction of the second mounting member is closed with a flexible film, so that the second Fixedly supported by the mounting member On both sides of the partition member formed, a pressure receiving chamber in which a part of the wall part is constituted by the main rubber elastic body and vibration is input, and a part of the wall part is constituted by the flexible film and has a volume. In the fluid-filled vibration isolator in which an equilibrium chamber that is allowed to change is formed and the pressure receiving chamber and the equilibrium chamber are communicated with each other by a second orifice passage, the metal sleeve has one axial direction in the pocket recess. A first annular body fixed to the outer peripheral surface of the wall portion, a second annular body fixed to the outer peripheral surface of the other wall portion in the axial direction in the pocket recess, the first annular body and the first annular body It is comprised including the some connection body which connects two annular bodies in the circumferential direction appropriate number place, and the said window part is formed between the connection bodies adjacent in the circumferential direction among these several connection bodies. On the other hand, at least one of the first annular body and the second annular body includes Reinforcing ribs extending in the circumferential direction are formed along at least one end edge in the axial direction, and a constricted portion that is curved or bent toward the inner circumferential side is formed in the coupling body. This is a feature.

  That is, as a result of the present inventors conducting a number of experiments and studies on a fluid-filled vibration isolator having a conventional structure as described in Patent Document 1 and the like, it was attached to the outer peripheral surface of the main rubber elastic body. When the diameter of the second metal fittings fitted to the metal sleeve or the metal sleeve is reduced, the first annular body or the second annular body is locally connected to both sides in the circumferential direction of the connecting portion of the connecting body. The new knowledge that the general distortion is concentrated is obtained.

  As a result of further studies by the present inventors, this phenomenon is caused when the metal sleeve or the second mounting bracket is subjected to diameter reduction processing, that is, a portion continuous in the axial direction in the metal sleeve, that is, The portion provided with the coupling body is deformed so as to extend in the axial direction, while the both sides in the axial direction of the window portion of the metal sleeve, that is, the portion where the coupling body is not provided is constrained by a drawing die or the like. Therefore, the stress concentrates on both sides in the circumferential direction of the connection part of the coupling body in the first annular body and the second annular body, resulting in distortion. The distortion becomes a deformation such as a local depression on the inner peripheral side, and as a result, a gap is generated between the metal sleeve and the second mounting bracket, resulting in a problem of a decrease in sealing performance. I got the knowledge of deafness, Ming, has been completed on the basis of this finding.

  Therefore, in the fluid filled type vibration damping device according to this aspect, the metal sleeve bends or is bent to the inner peripheral side with respect to the connection body connecting the first annular body and the second annular body in the axial direction. Since the curved constricted portion is formed, the constricted portion is easily deformed toward the inner peripheral side when an axial load is input, whereby the metal sleeve extends in the axial direction. Is reduced or avoided.

  Therefore, in the fluid filled type vibration damping device according to this aspect, concentration of stress between the portion of the metal sleeve connected in the axial direction by the connecting body and the portion divided in the axial direction by the window portion is avoided. Thus, local distortion is prevented, and stable sealing performance can be realized.

  Moreover, in this aspect, since at least one of the first annular body and the second annular body is formed with a reinforcing rib extending in the circumferential direction at least one end edge in the axial direction, The annular body in which the ribs are formed can ensure its strength, and thereby it is possible to reduce or avoid deformation during drawing.

  According to a second aspect of the present invention, in the fluid-filled vibration isolator according to the first aspect, the reinforcing rib includes the window portion in at least one of the first annular body and the second annular body. It is characterized in that it is formed over substantially the entire length of the axial end edge. In the fluid-filled vibration isolator having the structure according to the present embodiment, the reinforcing rib is substantially the entire length of the axial end edge of the window in at least one of the first annular body and the second annular body. Therefore, the strength of the opening side of the pocket recess in the first annular body or the second annular body can be advantageously ensured, thereby improving the sealing performance of the working fluid chamber. Can be secured.

  According to a third aspect of the present invention, in the fluid-filled vibration isolator according to the first or second aspect, the connecting body has a groove shape extending in the circumferential direction with a substantially V-shaped cross section including a pair of inclined side walls. The constricted portion is formed in the whole of the connecting body. In the fluid-filled vibration isolator having such a structure according to this aspect, the connecting body is formed in a concave groove shape extending in the circumferential direction with a substantially V-shaped cross section including a pair of inclined side walls. Since the constricted portion is formed as a whole, the constricted portion can be more easily deformed when a load is applied in the axial direction of the metal sleeve.

  According to a fourth aspect of the present invention, in the fluid-filled vibration isolator according to any one of the first to third aspects, the pocket recesses adjacent in the circumferential direction are formed by the constricted portions in the coupling body. The first orifice passage is formed by forming a groove extending in the circumferential direction across the groove and covering the groove with the second mounting member. In the fluid-filled vibration isolator having the structure according to this aspect, the groove formed so as to extend in the circumferential direction across the pocket recesses adjacent to each other in the circumferential direction by the constricted portion in the coupling body. Since the first orifice passage is formed by being covered with the second mounting member, a special member is not required to form the first orifice passage, thereby reducing the number of parts. The target fluid-filled vibration isolator can be manufactured in terms of the number of points.

  Further, in the fluid filled type vibration damping device according to this aspect, since the connecting body is deformed toward the inner peripheral side during the drawing process, the first orifice passage is crushed by the drawing process. This can be prevented.

  According to a fifth aspect of the present invention, in the fluid-filled vibration isolator according to any one of the first to fourth aspects, a cylindrical caulking portion is formed at an end portion in the axial direction of the metal sleeve. The second attachment to the outer peripheral surface including the first and second annular bodies formed in a portion of the metal sleeve that is removed from the caulking portion while caulking and fixing the partition member to the caulking portion The partition member is fixed to the second attachment member via the metal sleeve by externally fixing the member. According to this aspect, it is possible to advantageously realize the target fluid-filled vibration isolator.

  According to a sixth aspect of the present invention, there is provided the fluid filled type vibration damping device according to any one of the first to fifth aspects, wherein the metal sleeve is positioned inward in the axial direction by a predetermined distance from the caulking portion. By forming a step portion extending in the circumferential direction along the caulking portion, a large-diameter fitting portion is formed at the axial end portion of the metal sleeve on the side where the caulking portion is formed. The outer diameter of one annular body and the second annular body is made smaller than that of the large-diameter fitting portion, and the second annular body extends over the large-diameter fitting portion and the first and second annular bodies. The mounting member is externally fitted and fixed, and a seal rubber layer is interposed between the fitting surfaces of the first annular body and the second annular body and the second mounting member. In the fluid-filled vibration isolator having the structure according to this aspect, the seal rubber layer is interposed between the first annular body and the fitting surface of the second annular body and the second mounting member. Therefore, it is possible to further advantageously ensure the sealing performance of the working fluid chamber.

  In the present invention, (a) the first mounting member and the metal sleeve, which are spaced apart from each other in the radial direction, are connected by the main rubber elastic body, and at least two pocket recesses provided on the main rubber elastic body. A step of obtaining an integrally vulcanized molded product opened at the outer peripheral surface through a plurality of windows provided in the metal sleeve; and (b) reducing the diameter of the metal sleeve of the integrally vulcanized molded product. A step of pre-compressing the main rubber elastic body, (c) a step of forming a cylindrical second attachment member separately from the integrally vulcanized molded product, and (d) a pre-compression on the main rubber elastic body. The second mounting member is extrapolated to the compressed integrally vulcanized molded product, and is fitted onto and fixed to the metal sleeve so as to cover the plurality of windows in the metal sleeve. Connected by the orifice passage of A step of forming at least two working fluid chambers and fluidly closing one axial opening of the second mounting member with the main rubber elastic body; and (e) the integrally vulcanized molded product and The second mounting member includes a step of separately forming a partition member and a lid member, and (f) the partition member and the lid with respect to the other opening side in the axial direction of the second mounting member. By assembling the members, a pressure receiving chamber that is located between the main rubber elastic body and the partition member and a part of the wall portion is made of the main rubber elastic body and receives vibrations; the partition member; An equilibrium chamber that is located between the lid members and in which a part of the wall is made of a flexible film and is allowed to change in volume, and a second orifice passage that allows the pressure receiving chamber and the equilibrium chamber to communicate with each other. Each forming step; and (g) communicating with the first orifice passage. And a step of sealing an incompressible fluid simultaneously or separately into the pressure-receiving chamber and the equilibrium chamber communicated with each other through the second orifice passage. As the metal sleeve, the first annular body fixed to the outer peripheral surface of one wall portion in the axial direction in the pocket recess, and the outer peripheral surface of the other wall portion in the axial direction in the pocket recess. A second annular body to be fixed, and a plurality of coupling bodies that couple the first annular body and the second annular body at appropriate locations in the circumferential direction, and At least one of the first annular body and the second annular body is formed with a reinforcing rib extending in the circumferential direction at least one end edge in the axial direction, and the coupling body has an inner circumferential side. Curved or bent toward By adopting a constricted portion, the second mounting member is extrapolated to the metal sleeve, and the second mounting member is reduced in diameter, whereby the second mounting member is The metal sleeve is fitted and fixed to the first and second annular bodies, the diameter of the metal sleeve is reduced to pre-compress the main rubber elastic body, and the second mounting member is provided. In at least any of the diameter reduction processing of the second mounting member for fitting and fixing to the metal sleeve, by deforming the constricted portion of the metal sleeve, Another feature is a method for manufacturing a fluid-filled vibration isolator that adjusts changes in the axial dimension and suppresses local deformation in the first and second annular bodies.

  In the manufacturing method of the fluid filled type vibration damping device of the present invention, as the metal sleeve, the first annular body fixed to the outer peripheral surface of one axial wall portion in the pocket recess, and the pocket recess Including a second annular body fixed to the outer peripheral surface of the other wall portion in the axial direction, and a plurality of coupling bodies that couple the first annular body and the second annular body at appropriate positions in the circumferential direction. Reinforcing ribs extending in the circumferential direction are formed on at least one of the axial ends of at least one of the first annular body and the second annular body, and The connecting body employs a constricted portion that is curved or bent toward the inner peripheral side, and the second mounting member is extrapolated to a metal sleeve to reduce the diameter. By doing so, the second mounting member is attached to the first sleeve of the metal sleeve. The second annular body is fitted and fixed, and the diameter of the metal sleeve is reduced to pre-compress the main rubber elastic body, and the second mounting member is fixed to the metal sleeve. In the diameter reduction processing of the second mounting member, at least one of the diameter reduction processing, the change in the axial dimension of the metal sleeve is adjusted by deforming the constricted portion of the metal sleeve, and the first and second Since local deformation in the annular body is suppressed, it is possible to advantageously realize the production of the target fluid-filled vibration isolator.

  Further, in the manufacturing method of the fluid filled type vibration damping device of the present invention, as the metal sleeve, a cylindrical caulking portion is formed at an axial end edge portion, and the caulking portion is used to form the partition member. A tapered cylinder to which the lid member is fixed and which gradually expands from the second annular body located on the caulking portion side in the axial direction toward the opening on the opposite first annular body side In the integral vulcanized molded product, the diameter reduction ratio at the time of diameter reduction processing for the metal sleeve for pre-compressing the main rubber elastic body in the integrally vulcanized molded product is varied in the axial direction, The first annular body may be processed with a larger diameter reduction ratio than the second annular body, and even in such a case, the first and second Local deformation in the annular body, especially from the second annular body It is possible to avoid a local deformation in the first annular member to be processed in a large radial contraction rate, thereby it is possible to realize the production of fluid-filled vibration damping device intended.

  As is clear from the above description, in the fluid-filled vibration isolator having the structure according to the present invention, the plurality of coupling bodies that couple the first annular body and the second annular body respectively face the inner peripheral side. Therefore, when the metal sleeve is drawn, the constricted portion provided in each connected body is deformed toward the inner peripheral side, Thereby, it is possible to avoid the deformation of the first annular body and the second annular body.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 shows an automobile engine mount 10 as an embodiment of the present invention. The engine mount 10 includes a first mounting bracket 12 as a first mounting member and a second mounting bracket 14 as a second mounting member that are spaced apart from each other. The second mounting bracket 14 has a structure in which the main rubber elastic body 16 is elastically connected, and the first mounting bracket 12 is mounted on the power unit of the automobile, while the second mounting bracket 14 is mounted on the body of the automobile. As a result, the power unit is supported in a vibration-proof manner with respect to the body. The engine mount 10 of the present embodiment is mounted in a state where the vertical direction in FIG. 1 is a substantially vertical vertical direction. In the following description, the vertical direction is basically the vertical direction in FIG. It shall be said.

  More specifically, the first mounting bracket 12 includes a substantially inverted truncated cone-shaped main body 18 that gradually decreases in diameter in the axially downward direction, and a rectangular shape that extends axially upward from the large-diameter side end face of the main body 18. A block-shaped fixing part 20 is provided. The first mounting bracket 12 is bolted to a power unit (not shown) by a fixing bolt (not shown) screwed into a screw hole 22 provided in the fixing portion 20. A connecting sleeve 24 as a metal sleeve having a large-diameter cylindrical shape is disposed on the outer peripheral side of the first mounting member 12 so as to surround the periphery at a predetermined distance radially outward. . The connecting sleeve 24 is made of a metal material. The connecting sleeve 24 is biased to one side in the axial direction with respect to the first mounting bracket 12, and the end (main body portion 18) on the lower side in the axial direction of the first mounting bracket 12 has a predetermined length. While being surrounded by the connecting sleeve 24, the axially upper end (fixed portion 20) of the first mounting member 12 is projected upward from the connecting sleeve 24 over a predetermined length. ing.

  Further, a main rubber elastic body 16 is disposed between the radially-facing surfaces of the first mounting bracket 12 and the connecting sleeve 24, and the first mounting bracket 12 and the connecting sleeve 24 are connected to the main rubber elastic body 16. It is elastically connected by. The main rubber elastic body 16 has a cylindrical shape as a whole, and a connecting sleeve 24 is vulcanized and bonded to the outer peripheral surface so as to cover the whole. Further, the lower end portion (main body portion 18) of the first mounting bracket 12 is inserted into the main rubber elastic body 16 on the central axis, and spans a predetermined length of the lower end portion in the axial direction of the first mounting bracket 12. The portion is embedded in the main rubber elastic body 16 and vulcanized and bonded. In short, in this embodiment, the main rubber elastic body 16 is molded as an integrally vulcanized molded product 25 including the first mounting member 12 and the connecting sleeve 24.

  Further, the main rubber elastic body 16 is formed with pocket portions 26 and 26 as a pair of pocket recesses at positions facing each other in one radial direction. Each of these pocket portions 26, 26 has a bottomed hole shape that opens on the outer peripheral surface of the main rubber elastic body 16, has a circumferential length that is less than a half circumference in the circumferential direction, and the main rubber elastic body 16. It is formed with a depth of about ¼ of the outer diameter dimension. The main rubber elastic body 16 is formed with a mortar-shaped recess 28 so as to open at the lower end surface thereof.

  On the other hand, the connecting sleeve 24 includes a first annular body 30 that is vulcanized and bonded to the outer peripheral surface of the axial upper side wall portion 29 in the pair of pocket portions 26 and 26, and the axial direction in the pair of pocket portions 26 and 26. The second annular body 32 vulcanized and bonded to the outer peripheral surface of the lower wall portion 31 is connected in the axial direction by a plurality (four in the present embodiment) of connecting bodies 34 at an appropriate number of locations in the circumferential direction. In this way, the first annular body 30 and the second annular body 32 are connected by a plurality of connecting bodies 34 as described above, so that a window portion is provided between the adjacent connecting bodies 34, 34. An opening window 36 is formed. Accordingly, in the present embodiment, the plurality of coupling bodies 34 are provided at equal intervals in the circumferential direction, and thereby the plurality of coupling bodies 34 are opposed to each other in the radial direction perpendicular to each other. Accordingly, the plurality of opening windows 36 are also provided at equal intervals in the circumferential direction, and are opposed to each other in the radial direction perpendicular to each other. Furthermore, the first annular body 30 and the second annular body 32 have substantially the same outer diameter.

  In addition, the two connecting bodies 34 and 34 that are opposed to each other in one radial direction (the vertical direction in FIG. 2) among the plurality of connecting bodies 34 are circumferentially separating the pair of pocket portions 26 and 26 in the circumferential direction. The two coupling bodies 34 and 34 that are vulcanized and bonded to the outer peripheral surface of the direction wall portion 37 and are opposed to each other in a direction orthogonal to the opposing direction of the two coupling bodies 34 and 34 are respectively pockets. It is positioned at the central portion in the circumferential direction of the portion 26. That is, a direction orthogonal to the opposing direction of the two coupling bodies 34, 34 that are vulcanized and bonded to the outer peripheral surface of the circumferential wall portion 37 that separates the pair of pocket portions 26, 26 in the circumferential direction (the left-right direction in FIG. 2) Neither of the two coupling bodies 34, 34 positioned in (1) is vulcanized and bonded to the main rubber elastic body 16 over substantially the entire axial direction thereof. As is clear from this, in the present embodiment, each pocket portion 26 is externally provided through two opening windows 36, 36 formed on both sides in the circumferential direction of the coupling body 34 positioned at the circumferential central portion thereof. Is open.

  Accordingly, in the present embodiment, each of the plurality of coupling bodies 34 is formed so as to protrude to the inner peripheral side by the inclined wall portions 38 and 38 as a pair of inclined side walls, and is substantially V as a whole. It has a concave groove shape extending in the circumferential direction with a letter-shaped cross section. That is, in the present embodiment, the constricted portion is formed by the whole of the coupling body 34. In the present embodiment, of the pair of inclined wall portions 38, 38, the acute angle with respect to the axial direction of the inclined wall portion 38 on the upper side in the axial direction is the acute angle with respect to the axial direction of the inclined wall portion 38 on the lower side in the axial direction. It is made larger than the side inclination angle. The angle formed by the pair of inclined wall portions 38, 38 is greater than 90 degrees. Furthermore, in the coupling body 34 positioned at the center portion in the circumferential direction of each pocket portion 26, the axial upper side wall portion 29 in the pocket portion 26 is vulcanized and bonded to the inclined wall portion 38 on the upper side in the axial direction. On the other hand, the main rubber elastic body 16 is not vulcanized and bonded to the inclined wall portion 38 on the lower side in the axial direction.

  The first annular body 30 is formed with reinforcing ribs 44 that are bent toward the inner peripheral side over substantially the entire length of the edge of the opening window 36. In particular, in the present embodiment, the inclination angle on the acute angle side with respect to the axial direction of the reinforcing rib 44 is substantially the same as the inclination angle on the acute angle side with respect to the axial direction of the inclined wall portion 38 on the upper side in the axial direction.

  Furthermore, an inclined wall portion 40 as a stepped portion that gradually increases in diameter as it goes downward in the axial direction is formed at the lower end portion in the axial direction of the second annular body 32, and the large-diameter side end of the inclined wall portion 40 A fitting portion 42 as a large-diameter fitting portion is formed on the portion, that is, the lower end portion so as to protrude downward in the axial direction. In addition, an annular projecting outer protrusion 46 that extends radially outward is provided at the lower end in the axial direction of the fitting portion 42, and the outer peripheral edge of the outer protrusion 46 extends in the axial direction. A cylindrical caulking portion 48 is integrally formed so as to protrude downward.

  On the other hand, the second mounting bracket 14 has a large-diameter cylindrical shape, and an annular inner protrusion 50 protruding inward in the radial direction is integrally formed at the upper end in the axial direction. . Then, the second mounting bracket 14 is externally inserted into the connecting sleeve 24 constituting the integrally vulcanized molded product 25 from the side where the inward projecting portion 50 is not formed, and the fitting portion 42 in the connecting sleeve 24, The first and second annular bodies 30 and 32 are fitted and fixed. In addition, a thin seal rubber layer 52 is attached to the inner peripheral surface of the second mounting bracket 14 over substantially the entire surface, and the first annular body 30 and the second annular body 32 in the connection sleeve 24 and the first annular body 32. The fitting surface between the second mounting bracket 14 is fluid-tightly sealed. Thereby, a plurality of opening windows 36 serving as openings of the pair of pocket portions 26, 26 are covered fluid-tightly, and a pair of working fluid chambers 54, 54 are formed inside the main rubber elastic body 16. The pair of working fluid chambers 54, 54 are filled with incompressible fluid such as water, alkylene glycol, polyalkylene glycol, or silicone oil.

  Furthermore, two connecting bodies 34 vulcanized and bonded to the outer peripheral surfaces of the circumferential wall portions 37, 37 that divide the pair of pocket portions 26, 26 in the circumferential direction among the plurality of connecting bodies 34 in the connecting sleeve 24, The concave surface of 34 is also fluid-tightly covered with the second mounting bracket 14 over its entire length in the circumferential direction, thereby connecting the pair of working fluid chambers 54 and 54 to each other. First orifice passages 56 and 56 that allow the flow of the incompressible fluid between the liquid chambers 54 and 54 are formed. That is, in the present embodiment, a concave groove extending in the circumferential direction is formed between the pocket portions 26 and 26 adjacent in the circumferential direction by the pair of inclined wall portions 38 and 38 forming the coupling body 34. .

  Further, as described above, the connecting sleeve 24 fixed to the outer peripheral surface of the main rubber elastic body 16 is fitted and fixed to the second mounting bracket 14, so that the opening on the upper side in the axial direction of the second mounting bracket 14 is made. Fluid tightly covered. On the other hand, a diaphragm 58 as a flexible film is assembled in the opening portion on the lower side in the axial direction of the connecting sleeve 24, thereby opening the opening portion on the lower side in the axial direction of the connecting sleeve 24. The opening on the lower side in the axial direction of the second mounting bracket 14 is covered. The diaphragm 58 is a thin rubber film having a substantially dome shape that has a sufficient slack and is easily deformed. A fixing metal 60 is vulcanized and bonded to the outer peripheral edge of the diaphragm 58. The fixing metal 60 has a substantially cylindrical shape. The upper part is a large-diameter part 64 with a stepped part 62 formed in an intermediate part in the axial direction, and the lower part is a small-diameter part 66. The outer peripheral edge of the diaphragm 58 is vulcanized and bonded to the peripheral edge at the lower end in the axial direction of the fixture 60, that is, the opening end on the small diameter portion 66 side. As is clear from this, in the present embodiment, the diaphragm 58 is formed as an integrally vulcanized molded product 67 provided with the fixture 60. In the present embodiment, the inner peripheral surface of the fixture 60 is covered with a thin covering rubber layer 68 that is integrally formed with the diaphragm 58 and attached thereto. On the other hand, a fixing flange portion 70 that extends radially outward is integrally formed at the upper peripheral edge of the fixing bracket 60, that is, the opening end on the large diameter portion 64 side of the fixing bracket 60. It is overlapped with an outward projection 46 formed at the lower end opening of the connecting sleeve 24 and fixed in a fluid-tight manner by a caulking portion 48.

  As described above, the axially upper opening of the connecting sleeve 24 is fluid-tightly covered with the main rubber elastic body 16 and the axially lower opening is fluid-tightly covered with the diaphragm 58. That is, the opening on the upper side in the axial direction of the second mounting bracket 14 is fluid-tightly covered with the main rubber elastic body 16 and the opening on the lower side in the axial direction is covered with the diaphragm 58 in a fluid-tight manner. Thus, between the opposing surfaces of the main rubber elastic body 16 and the diaphragm 58, an enclosing region 72 sealed from the outside is formed. In addition, the sealing region 72 is filled with incompressible fluid such as water, alkylene glycol, polyalkylene glycol, or silicone oil. As is clear from this, in this embodiment, the lid member is constituted by the integrally vulcanized molded product 67 of the diaphragm 58.

  In addition, a partition member 74 having a substantially disk shape as a whole is disposed in the enclosing region 72 so as to extend in the direction perpendicular to the axis. The partition member 74 is configured by overlapping a partition member body 76 having a thick disc shape as a whole and a lid body 78 having an annular shape as a whole in the axial direction. Such a partition member 74 is protruded outward in the direction perpendicular to the axis from the outer peripheral surface of the partition member main body 76 under the outer peripheral edge of the cover body 78, that is, in a state where the partition member body 76 is superimposed on the lid body 78. The flange-shaped portion is overlapped with the outward projection 46 of the coupling sleeve 24 and is caulked and fixed to the lower end opening of the coupling sleeve 24 by the caulking portion 48 together with the fixing flange portion 70 of the fixing bracket 60. Under such a state that the outer peripheral edge of the lid 78 is caulked and fixed in this manner, the partition member main body 76 and the portion of the lid 78 that is superimposed on the upper surface of the partition member main body 76 are in close contact with each other. In this state, they are overlapped and sandwiched between the stepped portion 62 formed in the fixing metal 60 and the lower end surface in the axial direction of the outer peripheral edge of the main rubber elastic body 16. As is clear from this, in this embodiment, the partition member 74 is fixed to the second mounting member 14 via the connecting sleeve 24.

  As a result, the enclosed region 72 is fluid-divided vertically by the partition member 74. As a result, a part of the wall portion is formed of the main rubber elastic body 16 on the upper side of the partition member 74, and vibration input is performed. A pressure receiving chamber 80 in which pressure fluctuation is sometimes generated based on the elastic deformation of the main rubber elastic body 16 is formed. On the lower side of the partition member 74, a part of the wall portion is constituted by a diaphragm 58. Based on the deformation of the diaphragm 58, an equilibrium chamber 82 in which a volume change is easily allowed is formed.

  Further, a notch circumferential groove 84 extending in the circumferential direction with a length of a little less than one round is formed in the outer peripheral edge of the upper end of the partition member main body 76, and the opening portion of the notch circumferential groove 84 covers the entire circumference. 78 is fluid-tightly covered. As a result, the outer peripheral portion of the partition member 74 extends in the circumferential direction, and one end in the circumferential direction is connected to the pressure receiving chamber 80 through the communication hole 86 formed in the lid 78, and the other end in the circumferential direction is partitioned. By being connected to the equilibrium chamber 82 through the communication hole 88 formed in the member main body 76, the pressure receiving chamber 80 and the equilibrium chamber 82 are communicated with each other, and fluid flow between the chambers 80 and 82 is allowed. A second orifice passage 90 is formed.

  Furthermore, the partition member main body 76 is formed with a circular recess 92 that opens to the upper surface in the axial direction, and a vibration rubber plate 94 is accommodated in the recess 92. The vibration rubber plate 94 has a substantially disc shape with a predetermined thickness that is slightly upwardly convex as if the tray is turned down. Further, a fitting ring 96 is vulcanized and bonded to the outer peripheral surface of the vibration rubber plate 94, and the fitting ring 96 is press-fitted into the recess 92, and fluid is applied to the inner peripheral surface of the recess 92. By being fixed tightly, the vibration rubber plate 94 is disposed in the recess 92 so as to spread in the direction perpendicular to the axis. In the present embodiment, the lower end portion of the fitting ring 96 is formed at the bottom of the recess 92 in a state where the vibration rubber plate 94 is disposed so as to extend in the direction perpendicular to the axis in the recess 92. While being fitted in the concave groove, the upper end portion of the fitting ring 96 is pressed by the inner peripheral edge portion of the lid body 78.

  As a result, the recess 92 is fluid-divided into the bottom side and the opening side with the vibration rubber plate 94 interposed therebetween. As a result, the axially lower side of the vibration rubber plate 94 is hermetically sealed. While the working air chamber 98 is formed, a pressure receiving chamber 80 is positioned above the vibration rubber plate 94. That is, in the present embodiment, a part of the wall portion of the pressure receiving chamber 80 is constituted by the vibration rubber plate 94. Further, the recess 92 is formed with a supply / exhaust passage 100 that opens to the bottom surface of the recess 92 and extends radially outward, and an air passage (not shown) is connected to the supply / exhaust passage 100. It has come to be. The working air chamber 98 is alternately connected to the atmosphere and the negative pressure source through this air passage, so that the switching frequency when the working air chamber 98 is alternately connected to the atmosphere and the negative pressure source. The vibration rubber plate 94 is displaced by vibration at a frequency corresponding to. The supply / discharge passage 100 is opened to the outside through a window formed in the fixing bracket 60.

  The engine mount 10 having such a structure is attached to the power unit by a mounting bolt (not shown) in which the first mounting bracket 12 is screwed into the screw hole 22, while the second mounting bracket 14 is interposed via a bracket (not shown). It can be attached to the body so that the power unit is supported by vibration isolation against the body. Note that, with the engine mount 10 mounted between the power unit and the body in this way, the central axes of the first and second mounting brackets 12 and 14 serving as the mount central axes extend in a substantially vertical direction. On the other hand, the pair of working fluid chambers 54, 54 are opposed to each other in the vehicle front-rear direction.

  When a substantially vertical vibration load is input between the first mounting bracket 12 and the second mounting bracket 14 in such a mounting state, an internal pressure fluctuation is caused in the pressure receiving chamber 80. . In this case, when the input vibration is a low-frequency large-amplitude vibration such as an engine shake, an anti-vibration effect is exhibited based on the resonance action of the fluid flowing through the second orifice passage 90, while the input vibration is confined. In the case of high-frequency, small-amplitude vibration such as sound, vibration transmission is performed by absorbing or reducing fluctuations in the internal pressure of the pressure receiving chamber 80 by exciting the vibration rubber plate 94 at a frequency and phase corresponding to the vibration to be vibration-proof. As a result, the effective vibration isolation effect is exhibited.

  On the other hand, when a vibration load in a substantially horizontal direction toward the vehicle front-rear direction is input between the first mounting bracket 12 and the second mounting bracket 14 in the mounted state, between the pair of working fluid chambers 54, 54. A relative pressure difference is generated, and an effective damping effect is exerted on low-frequency large-amplitude vibration such as engine shake based on the resonance action of the fluid flowing through the first orifice passages 56 and 56. It can be done.

  Next, a method for manufacturing the engine mount 10 having such a structure will be described. First, after the first mounting bracket 12 and the connecting sleeve 24 are positioned and supported at a predetermined position of a molding cavity formed in the molding die, the molding rubber is filled with a predetermined rubber material, and the main rubber elastic body 16 is fixed. At the same time as the vulcanization molding, a step of adhering to the outer peripheral surface of the first mounting bracket 12 and the inner peripheral surface of the connecting sleeve 24 is carried out, whereby an integrated vulcanization molded product 25 as shown in FIG. obtain. At that time, as shown in FIG. 4, the connection sleeve 24 constituting the integrally vulcanized molded product 25 gradually expands from the second annular body 32 side toward the first annular body 30 side. What has a taper cylinder shape is adopted. That is, the first annular body 30 has a larger diameter than the second annular body 32.

  A process of pre-compressing the main rubber elastic body 16 by reducing the diameter of the connecting sleeve 24 of the integrally vulcanized molded product 25 is performed. Accordingly, as shown in FIG. 5, in the integrally vulcanized molded product 25, the first annular body 30 and the second annular body 32 in the connection sleeve 24 have substantially the same outer diameter. That is, the diameter reduction ratio at the time of diameter reduction processing for the connecting sleeve 24 is varied in the axial direction, so that the first annular body 30 is diameter-reduced with a larger diameter reduction ratio than the second annular body 32. It is. Further, when the diameter of the connecting sleeve 24 is reduced, the pair of inclined wall portions 38, 38 forming each connecting body 34 is deformed toward the inner peripheral side, and thereby, before the diameter reduction processing. The axial dimensions of the connecting sleeve 24 after the diameter reduction processing are substantially the same, and local deformation of the first and second annular bodies 30 and 32 is suppressed.

  Subsequently, the second mounting bracket 14 separately formed by press working is prepared, and the seal rubber layer 52 is vulcanized and bonded to the inner peripheral surface of the second mounting bracket 14. Then, the second mounting bracket 14 to which the seal rubber layer 52 is vulcanized and bonded is extrapolated with respect to the integrally vulcanized molded product 25 in which the main rubber elastic body 16 is pre-compressed in an incompressible fluid, By subjecting the second mounting bracket 14 to a diameter reduction process, as shown in FIG. 6, a step of externally fixing the second mounting bracket 14 to the connecting sleeve 24 is performed. As a result, the plurality of opening windows 36 in the connection sleeve 24 are covered with the second mounting bracket 14, and a pair of working fluid chambers 54, 54 communicated with each other through the first orifice passage 56 is formed. In addition, one opening in the axial direction of the second mounting bracket 14 is closed fluid-tightly by the main rubber elastic body 16.

  In addition, since the step of fitting and fixing the second mounting bracket 14 to the connecting sleeve 24 is performed in an incompressible fluid, the second mounting bracket 14 is fitted and fixed to the connecting sleeve 24. At the same time as the process, a process of enclosing the incompressible fluid in the pair of working fluid chambers 54 and 54 is also performed.

  Next, an integrated vulcanized molded product 67 of the diaphragm 58, a partition member main body 76, a lid 78, and a vibration rubber plate 94 to which the fitting ring 96 is vulcanized and bonded are prepared, and the integrated vulcanized molded product 67 is fixed. After the partition member main body 76 is accommodated in the metal fitting 60, the vibration rubber plate 94 is accommodated in the recess 92 of the partition member main body 76. In addition, the opening on the outside of the supply / discharge passage 100 is sealed with a sealing member (not shown) while the partition member main body 76 is accommodated in the fixture 60.

  Then, in the incompressible fluid, after the outer peripheral edge portion of the lid body 78, that is, the flange-like portion is superimposed on the outward projection 46 of the connecting sleeve 24, the flange-like portion of the lid body 78 is overlapped. The fixing flange 60 of the fixing bracket 60 is overlapped with the fixing bracket 60 and fixed by the caulking portion 48 of the connecting sleeve 24, so that the partition member is attached to the other opening side in the axial direction of the second mounting bracket 14. 74 and the integrally vulcanized molded product 67 are assembled, and a step of forming the pressure receiving chamber 80, the equilibrium chamber 82, and the second orifice passage 90 is performed. Here, the step of forming the pressure receiving chamber 80, the equilibrium chamber 82, and the second orifice passage 90 is performed in the incompressible fluid, and therefore, the incompressible fluid is sealed in the pressure receiving chamber 80 and the equilibrium chamber 82. The process is also performed simultaneously with the process of forming the pressure receiving chamber 80, the equilibrium chamber 82, and the second orifice passage 90.

  Thereafter, when the sealing member is removed, the engine mount 10 of the present embodiment as shown in FIG. 1 is obtained.

  In the engine mount 10 of this embodiment, the first annular body 30 vulcanized and bonded to the outer peripheral surface of the axial upper side wall portion 29 in the pair of pocket portions 26, 26, and the pair of pocket portions 26, 26, A plurality of coupling bodies 34 that couple the second annular body 32 vulcanized and bonded to the outer peripheral surface of the axial lower side wall portion 31 at 26 at appropriate locations in the circumferential direction are formed by a pair of inclined wall portions 38, 38. Therefore, when the integrated vulcanized molded product 25 is drawn, the plurality of coupling bodies 34 are each deformed toward the inner peripheral side, whereby the first annular body 30 is deformed. Even when the drawing is performed while the axial positions of the second annular body 32 are defined, the first annular body 30 and the second annular body 32 are prevented from being deformed. It becomes possible to do.

  Moreover, in this embodiment, since the reinforcing rib 44 is formed over the substantially full length in the site | part in which the opening window 36 in the 1st annular body 30 was formed, the intensity | strength of the 1st annular body 30 is ensured. As a result, even if the first annular body 30 is subjected to diameter reduction processing with a larger diameter reduction ratio than the second annular body 32, the first annular body 30 is deformed. It is possible to avoid being tightened.

  As mentioned above, although one Embodiment of this invention was explained in full detail, this is an illustration to the last, Comprising: This invention is not limited at all by the specific description in this Embodiment.

  For example, in the above-described embodiment, the vibration rubber plate 94 is disposed, but the vibration rubber plate 94 is not necessarily disposed.

  In the above embodiment, the second annular body 32 is provided with the outward projection 46 and the caulking portion 48. However, the outward projection 46 and the caulking portion 48 are provided with the second annular body 32. It is not always necessary to be provided. Further, a reinforcing rib may be provided for the second annular body 32.

  Furthermore, the tuning frequency of the first and second orifice passages is not limited to that of the above-described embodiment. For example, the tuning frequency of the first and second orifice passages is tuned to the idling vibration frequency range. Is also possible.

  Moreover, in the said embodiment, although the connection body 34 was made into the shape bent toward the inner peripheral side by a pair of inclined wall parts 38 and 38, it is formed so that it may curve toward the inner peripheral side. May be. Further, the shape of the constricted portion is not limited to that of the above embodiment, and may be a shape bent in a U shape, for example.

  In addition, in the above-described embodiment, a specific example of applying the present invention to an engine mount has been shown, but the present invention is also applied to a vibration isolator for various vibrating bodies other than a body mount and an automobile. Needless to say, both are applicable.

  In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.

It is a longitudinal cross-sectional view which shows the engine mount as one Embodiment of this invention, Comprising: It is II sectional drawing in FIG. It is II-II sectional drawing in FIG. It is a figure which shows the cross section of a part of engine mount shown by FIG. 1, Comprising: It is a figure equivalent to the cross section of the III-III direction in FIG. It is a longitudinal cross-sectional view which shows before drawing processing of the integral vulcanization molded product of the main rubber elastic body employed in the engine mount shown in FIG. 1, and is a cross-sectional view corresponding to the II direction in FIG. . It is a longitudinal cross-sectional view which shows the after-drawing process of the integral vulcanization molded product of the main body rubber elastic body employ | adopted as the engine mount shown by FIG. 1, Comprising: It is sectional drawing equivalent to the II direction in FIG. . FIG. 3 is a longitudinal sectional view showing a state in which a second mounting bracket is fitted and fixed to an integrally vulcanized molded product of a main rubber elastic body employed in the engine mount shown in FIG. It is sectional drawing equivalent to an II direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Engine mount 12 1st attachment metal fitting 14 Second attachment metal fitting 16 Main body rubber elastic body 24 Connection sleeve 26 Pocket part 29 Axial upper side wall part 30 First annular body 31 Axial lower side wall part 32 Second annular body 34 connecting body 36 opening window 38 inclined wall portion 44 reinforcing rib 54 working fluid chamber 56 first orifice passage 58 diaphragm 74 partition member 80 pressure receiving chamber 82 equilibrium chamber 90 second orifice passage

Claims (8)

A metal sleeve elastically connected to a first mounting member and a metal sleeve spaced apart on the outer peripheral side of the first mounting member is connected by a main rubber elastic body, and at least two pocket recesses provided in the main rubber elastic body are connected to the metal sleeve. At least two working fluids are formed inside the main rubber elastic body by opening the outer peripheral surface through a plurality of windows provided in the outer peripheral surface and fixing the cylindrical second mounting member to the metal sleeve. The chamber is provided and the working fluid chambers are communicated with each other by the first orifice passage, while the second mounting member is fitted and fixed to the metal sleeve so that one opening in the axial direction of the second mounting member is provided. Is closed fluid-tightly with the main rubber elastic body, and the other opening in the axial direction of the second mounting member is closed with a flexible film, and is fixedly supported by the second mounting member. Sandwiched partition member On both sides, a pressure receiving chamber in which a part of the wall portion is constituted by the main rubber elastic body and vibration is inputted, and an equilibrium chamber in which a part of the wall portion is constituted by the flexible film and volume change is allowed In the fluid-filled vibration isolator in which the pressure receiving chamber and the equilibrium chamber are communicated with each other by the second orifice passage,
The metal sleeve is fixed to the outer peripheral surface of one wall portion in the axial direction in the pocket recess, and the second annular member is fixed to the outer peripheral surface of the other wall portion in the axial direction in the pocket recess. And a plurality of connecting bodies that connect the first annular body and the second annular body at an appropriate number of places in the circumferential direction, and are adjacent to each other in the circumferential direction among the plurality of connecting bodies. While the window portion is formed between the coupling bodies, at least one of the first annular body and the second annular body is reinforced to extend at least one end edge in the axial direction in the circumferential direction. A fluid-filled vibration damping device, characterized in that a rib is formed, and a constricted portion that is curved or bent toward the inner peripheral side is formed on the coupling body.   2. The fluid sealing according to claim 1, wherein the reinforcing rib is formed over substantially the entire length of the axial end edge portion of the window portion in at least one of the first annular body and the second annular body. Type vibration isolator.   The said connection body is made into the concave groove shape extended in the circumferential direction by the substantially V-shaped cross section which consists of a pair of inclined side wall, The said constriction-like part is formed in the whole of this connection body. Fluid-filled vibration isolator.   A concave groove extending in the circumferential direction is formed between the pocket recesses adjacent in the circumferential direction by the constricted portion of the coupling body, and the concave groove is covered with the second mounting member. The fluid-filled vibration isolator according to claim 1, wherein the first orifice passage is formed.   A cylindrical caulking portion is formed at an axial end edge of the metal sleeve, and the partition member is caulked and fixed to the caulking portion, while the caulking portion of the metal sleeve is formed at a portion removed from the caulking portion. The partition member is fixed to the second mounting member via the metal sleeve by externally fixing the second mounting member to the outer peripheral surface including the first and second annular bodies. The fluid-filled vibration isolator according to any one of claims 1 to 4.   The metal sleeve on the side where the caulking portion is formed by forming a step portion that is positioned inward in the axial direction by a predetermined distance from the caulking portion and extends in the circumferential direction along the caulking portion. A large-diameter fitting portion is formed at the axial end portion of the first annular body and the outer diameter dimensions of the first annular body and the second annular body are made smaller than the large-diameter fitting section. The second attachment member is externally fitted and fixed over the attachment portion and the first and second annular bodies, and the first annular body and the second annular body and the second attachment member are fitted together. The fluid-filled vibration isolator according to claim 5, wherein a seal rubber layer is interposed between the surfaces. The first mounting member and the metal sleeve, which are spaced apart from each other in the radial direction, are connected by the main rubber elastic body, and at least two pocket recesses provided in the main rubber elastic body are provided in the metal sleeve. A step of obtaining an integrally vulcanized molded product opened to the outer peripheral surface through a plurality of windows;
Applying pre-compression to the main rubber elastic body by reducing the diameter of the metal sleeve of the integrally vulcanized molded product;
Forming a cylindrical second mounting member separately from the integrally vulcanized molded product;
The second attachment member is extrapolated to the integrally vulcanized molded product in which the main rubber elastic body is pre-compressed, and is fitted and fixed to the metal sleeve to cover the plurality of windows in the metal sleeve. As a result, at least two working fluid chambers communicated with each other through the first orifice passage are formed, and one axial opening of the second mounting member is closed fluid-tightly with the main rubber elastic body. And the process
The integral vulcanized molded product and the second mounting member are separately formed into a partition member and a lid member,
By assembling the partition member and the lid member to the other opening side in the axial direction of the second mounting member, a part of the wall portion is positioned between the main rubber elastic body and the partition member. A pressure receiving chamber that is constituted by the main rubber elastic body and receives vibrations, and a part of the wall portion that is located between the partition member and the lid member is constituted by a flexible film so that volume change is allowed. Forming a respective equilibrium chamber and a second orifice passage that allows the pressure receiving chamber and the equilibrium chamber to communicate with each other;
An incompressible fluid is sealed simultaneously or separately in the working fluid chamber communicated by the first orifice passage and the pressure receiving chamber and the equilibrium chamber communicated by the second orifice passage. Process,
When manufacturing the fluid-filled vibration isolator by the above, as the metal sleeve, the first annular body fixed to the outer peripheral surface of one axial wall portion in the pocket recess, and the other axial direction in the pocket recess A second annular body fixed to the outer peripheral surface of the wall portion, and a plurality of coupling bodies that couple the first annular body and the second annular body at appropriate locations in the circumferential direction. And at least one of the first annular body and the second annular body is formed with reinforcing ribs extending in the circumferential direction along at least one end edge in the axial direction, and The connecting body is formed with a constricted portion that is curved or bent toward the inner peripheral side, and the second mounting member is externally attached to the metal sleeve. By reducing the diameter of the member, the second mounting member is The metal sleeve is fitted and fixed to the first and second annular members of the genus sleeve, the diameter of the metal sleeve is reduced to pre-compress the main rubber elastic body, and the second mounting member is provided. In at least any of the diameter reduction processing of the second mounting member for fitting and fixing to the metal sleeve, by deforming the constricted portion of the metal sleeve, A method for manufacturing a fluid filled type vibration damping device, wherein a change in axial dimension is adjusted to suppress local deformation in the first and second annular bodies. As the metal sleeve, a cylindrical caulking portion is formed at an axial end edge portion, and the partition member and the lid member are fixed using the caulking portion, and the caulking portion in the axial direction. Adopting a tapered cylindrical shape that gradually expands from the second annular body located on the side toward the opening on the opposite first annular body side, the main body rubber in the integral vulcanization molded product The first annular body is processed with a larger diameter reduction ratio than the second annular body by varying the diameter reduction ratio in the axial direction of the metal sleeve for pre-compressing the elastic body. A method for manufacturing a fluid-filled vibration isolator according to claim 7.

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