JP6554007B2 - Vibration isolator and manufacturing method thereof - Google Patents

Description

  The present invention relates to a vibration control device that constitutes an engine mount or the like of a vehicle, and more particularly to a vibration control device whose outer bracket is made of synthetic resin and a method of manufacturing the same.

  Conventionally, an anti-vibration device is known as a type of anti-vibration support body or anti-vibration coupling body that is interposed between members constituting a vibration transmission system and that mutually anti-vibrates the members. It is applied to engine mounts. The vibration isolator is generally an inner mounting member attached to one member (power unit or the like) constituting the vibration transmission system, and an outer attachment member attached to the other member (vehicle body or the like) constituting the vibration transmission system. Are elastically connected by a main rubber elastic body.

  By the way, in the anti-vibration device, the inner mounting member may be attached to the component of the vibration transmission system via the inner bracket, and the outer mounting member may be attached to the component of the vibration transmission system via the outer bracket. Attaching a large bracket made of metal with a high specific gravity increases the weight. Therefore, Japanese Patent Application Laid-Open No. 2010-255685 (Patent Document 1) proposes a vibration control device in which an outer bracket is formed of a synthetic resin.

  However, since the vibration isolator described in Patent Document 1 has a structure in which the outer bracket is attached to the outer mounting member, there is still a problem that the number of parts is large and the structure is complicated. Moreover, in the vibration control device according to Patent Document 1, only the stopper in one direction for limiting the amount of relative displacement of the inner mounting member with respect to the outer bracket is configured, and vibration input in multiple directions can not be coped with. There is also a problem that the structure of the applicable vibration isolation object is limited.

JP 2010-255685 A

  The present invention has been made against the background described above, and the problem to be solved is to achieve a wide range of vibration isolation targets by obtaining the stopper action in a plurality of directions while achieving further weight reduction and simplification of the structure. It is an object of the present invention to provide a vibration damping device having a novel structure and a method of manufacturing the same, which is applicable to the present invention.

  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 inner mounting member attached to one member constituting the vibration transmission system, and the synthetic resin outer bracket attached to the other member constituting the vibration transmission system In the vibration damping device having a structure elastically coupled by a rubber elastic body, the outer bracket includes a fixed portion directly fixed to the main rubber elastic body, and the inner mounting member protruding from the fixed portion. A pair of opposing parts disposed opposite to each other across the pair, and a connecting part that mutually connects the pair of opposing parts on the projecting tip side from the fixed part, and is opposed to the inner mounting member, A bound stopper is configured to limit the relative displacement of the inner mounting member and the outer bracket by the abutment of the fixing portion and the inner bracket extending laterally from the inner mounting member. Both side stoppers are configured to limit the amount of relative displacement between the inner mounting member and the outer bracket by the contact between the pair of opposing portions and the inner mounting member, and further the contact between the connecting portion and the inner mounting member. A rebound stopper that limits the relative displacement between the inner mounting member and the outer bracket is configured, while the large-diameter side end of the main rubber elastic body has a substantially rectangular shape. Is a stepped relief portion whose inner surface of the opposing portion has a larger distance between the opposing surfaces than the constituent portions of the side stoppers, and a pair of the rubber elastic bodies having a rectangular shape at the end portion on the large diameter side. It is characterized in that it is provided to extend linearly along the linear outer periphery of the

  According to the vibration-damping device having the structure according to the first aspect, the outer bracket is made of a synthetic resin, whereby the weight is significantly reduced compared to the conventional metal outer bracket. Furthermore, the outer bracket is directly fixed to the main rubber elastic body, and the outer attachment member is omitted, thereby simplifying the structure and reducing the weight.

In the present invention, the bounce stopper is configured by the contact between the outer bracket and the inner bracket, and the side stopper and the rebound stopper are configured by the contact between the outer bracket and the inner mounting member. In addition, it is possible to obtain an effective stopper action even for input in a plurality of directions. Therefore, for example, the vibration control device according to the present invention can be used not only when vibration is input only in a specific direction but also when vibration is input in a plurality of directions, which is more diverse. The present invention can be applied to various vibration isolation target structures. Furthermore, in the present invention, the elastic deformation of the main rubber elastic body due to the vibration input (the bulging deformation toward the pair of opposing parts) is sufficiently tolerated by the relief part, and the desired vibration-proofing characteristic can be obtained. At the same time, damage or the like due to the contact of the main rubber elastic body with the pair of opposing portions is also avoided. In addition, by configuring the side stopper with a portion where the distance between the opposing surfaces in the pair of opposing portions is smaller than the escape portion, the stopper clearance of the side stopper is set with a large degree of freedom while preventing the influence on the vibration isolation characteristics. be able to.

  According to a second aspect of the present invention, in the vibration-damping device described in the first aspect, the fixed portion is cylindrical, and a stopper on the periphery of the fixed portion constitutes the bound stopper. A pair of opposing portions are provided at a portion which is a receiving portion and which is outside the stopper receiving portion on the periphery of the fixed portion.

  According to the second aspect, by fixing the main rubber elastic body to the cylindrical fixing portion over the entire circumference, it is possible to obtain a large bonding strength between the main rubber elastic body and the outer bracket. In addition, the rigidity of the outer bracket can be easily increased by making the fixed portion be cylindrical, and the load resistance of the outer bracket can be improved.

  A third aspect of the present invention is the vibration damping device described in the first or second aspect, wherein the body rubber is provided to a portion constituting the bound stopper by contact with the inner bracket in the fixed portion. The first buffer rubber integrally formed with the elastic body is fixed.

  According to the third aspect, in the bound stopper, the hitting sound of the outer bracket and the inner bracket due to hitting is reduced by the buffer action of the first buffer rubber.

  Furthermore, for example, in the vibration damping device of the conventional structure described in Japanese Patent Application Laid-Open No. 2013-190037, the inner bracket and the outer bracket are not directly fixed to the main rubber elastic body, and the inner mounting member and the outer mounting It is retrofitted to an integrally vulcanized molded article of a main body rubber elastic body provided with a member. Therefore, the first buffer rubber integrally formed with the main rubber elastic body in order to reduce the number of parts is inserted between the inner bracket and the outer bracket and disposed in a non-fixed manner, and the first buffer There may be cases where abnormal noise occurs due to rubber hitting the inner bracket or the outer bracket. On the other hand, in the present embodiment, since the outer bracket is directly fixed to the main rubber elastic body, the first buffer rubber integrally formed with the main rubber elastic body can be fixed to the outer bracket No abnormal noise can be caused by the impact of the first buffer rubber and the outer bracket. In addition, since the first buffer rubber is restrained by the outer bracket, unnecessary deformation of the first buffer rubber is prevented, and the intended buffer action can be stably obtained.

  According to a fourth aspect of the present invention, in the vibration-damping device described in any one of the first to third aspects, the inner mounting member constitutes the side stopper by abutting on the pair of opposing parts. The second buffer rubber integrally formed with the main rubber elastic body is fixed to the portion that constitutes the rebound stopper by the contact with the connecting portion and the connecting portion.

  According to the 4th aspect, generation | occurrence | production of a hitting sound is avoided with respect to contact | abutting of the inner attachment member and outer bracket in a side stopper and a rebound stopper by the buffer action of a 2nd buffer rubber.

  If this aspect is adopted in combination with the third aspect, the impact reduction effect of the first shock absorbing rubber and the second shock absorbing rubber can be obtained at the stopper in each direction, and the first shock absorbing rubber and The second buffer rubber can be easily formed integrally with the main rubber elastic body.

A fifth aspect of the present invention is a method of manufacturing a vibration-damping device described in any one of the first to fourth aspects, wherein integral vulcanization molding of the main rubber elastic body provided with the inner attachment member is performed. A vulcanization molding step for forming a product, and an integral vulcanization molding product of the main rubber elastic body is set in a molding die for the outer bracket, and the outer bracket is fixed by injection molding. And a bracket forming step of forming the outer bracket in a state in which the part is fixed to the main rubber elastic body, and in the bracket forming step, the integrally vulcanized molded article of the main rubber elastic body is set By selecting the molding die for the outer bracket, a solid-type vibration damping device and a fluid-filled vibration damping device are selectively manufactured using a single integral molded product of the main body rubber elastic body. about , And features.

According to the method of manufacturing the vibration control device according to the fifth aspect, the solid type (non-fluid-filled type) vibration control device and the fluid-sealed vibration control are used while making the inner mounting member and the main rubber elastic body common. The device can be selectively manufactured. The solid type vibration isolator and the fluid filled type vibration isolator, for example, insert a metal fitting for fixing a fluid sealing member to the outer bracket while manufacturing the fluid filled type vibration isolator, This can be selectively realized, for example, by not inserting such a metal fitting when manufacturing a vibration absorbing device of the formula.

  According to the present invention, the structure can be simplified and the weight can be reduced by directly fixing the synthetic resin outer bracket to the main rubber elastic body. In addition, since the outer bracket constitutes a bound stopper, a side stopper, and a rebound stopper, an effective stopper action can be obtained for input in a plurality of directions, and the range of applicable vibration isolation target structures is wide. Become.

The front view which shows the engine mount as 1st embodiment of this invention. The top view of the engine mount shown in FIG. FIG. 2 is a bottom view of the engine mount shown in FIG. 1; FIG. 2 is a right side view of the engine mount shown in FIG. 1; VV sectional drawing of FIG. The front view of the integral vulcanization molded product which comprises the engine mount shown in FIG. FIG. 7 is a plan view of the integrally vulcanized molded article shown in FIG. 6; FIG. 7 is a bottom view of the integrally vulcanized molded article shown in FIG. 6; FIG. 7 is a right side view of the integrally vulcanized molded article shown in FIG. 6; It is a longitudinal cross-sectional view explaining the manufacturing process of the engine mount shown in FIG. 1, Comprising: The figure which set the integral vulcanization molded article and the caulking member to the metal mold | die. The perspective view of the crimping member which comprises the engine mount shown in FIG. The front view which shows the engine mount as 2nd embodiment of this invention. XIII-XIII sectional drawing of FIG. XIV-XIV sectional drawing of FIG. It is a longitudinal cross-sectional view explaining the manufacturing process of the engine mount shown in FIG. 12, Comprising: The figure which set the integral vulcanization molded article to the metal mold | die for shaping | molding.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  An engine mount 10 for a motor vehicle is shown in FIGS. 1 to 5 as a first embodiment of a vibration-damping device constructed according to the invention. The engine mount 10 is a fluid-filled vibration damping device, and has a structure in which an outer bracket 14 is fixed to an integrally vulcanized molded product 12. In the following description, in principle, the vertical direction refers to the vertical direction in FIG. 1, the longitudinal direction refers to the horizontal direction in FIG. 1, and the horizontal direction refers to the vertical direction in FIG.

  More specifically, the integrally vulcanized molded product 12 has a structure in which a main rubber elastic body 18 is vulcanized and bonded to an inner mounting member 16 as shown in FIGS. The inner mounting member 16 is a highly rigid member made of iron, aluminum alloy or the like, and has a substantially square rectangular cylindrical fitting portion 20 extending laterally and a recessed portion 22 opening upward. The embedded portion 22 is integrally formed at the center portion of the lower wall portion of the fitting portion 20 and protrudes downward. The inner attachment member 16 of this embodiment is a metal press material, and the fitting portion 20 and the embedded portion 22 are continuously and integrally formed.

  The main rubber elastic body 18 has a large diameter substantially square frustum shape, and the inner mounting member 16 is bonded by vulcanization to the end on the small diameter side. In the present embodiment, the embedded portion 22 is bonded by vulcanization to the main rubber elastic body 18 in a buried state, and the inner peripheral surface of the fitting portion 20 is formed by the covering rubber layer 24 integrally formed with the main rubber elastic body 18. While being covered, the front and rear shock absorbing rubbers 26, 26 and rebound shock absorbing rubber 28 as a second shock absorbing rubber integrally formed with the main rubber elastic body 18 are vulcanized and adhered to the outer peripheral surface of the fitting portion 20. Yes. At approximately the centers of the front and rear shock absorbing rubbers 26 and 26 and the rebound shock absorbing rubber 28, a tapered shock absorbing projection 29 whose thickness dimension is partially enlarged is integrally formed and protrudes outward.

  Furthermore, a bound buffer rubber 30 as a first buffer rubber is integrally formed on the main rubber elastic body 18. The bounce buffer rubber 30 is provided at a lower portion of a main rubber elastic body 18 fixed to an outer bracket 14 to be described later, and is formed in a plate shape that protrudes to the outer peripheral side at a part of the circumference of the main rubber elastic body 18. The main rubber elastic body 18 extends in the circumferential direction (left-right direction) by a predetermined length.

  Furthermore, the main rubber elastic body 18 is formed with a large-diameter recess 32 that opens to the end surface on the large-diameter side. The large diameter recess 32 is a substantially quadrangular frustum shaped recess whose cross-sectional shape decreases as going upward, and is a depth not reaching the embedded portion 22 of the inner mounting member 16. Since the large-diameter recess 32 is formed in the lower part of the main rubber elastic body 18, both the inner peripheral surface and the outer peripheral surface of the lower portion of the main rubber elastic body 18 are inclined downward toward the outer periphery. .

  As shown in FIGS. 1 to 5, the outer bracket 14 is fixed to the integrally vulcanized molded article 12 having such a structure. The outer bracket 14 is formed of a synthetic resin such as polyamide, and includes a mounting tube portion 34 as a cylindrical fixing portion, and front and rear mounting leg portions 36 projecting downward at front and rear sides of the mounting tube portion 34. , And a gate-shaped stopper portion 38 extending upward with respect to the front and rear mounting legs 36, 36 and straddling the upper side of the mounting cylindrical portion 34. The strength can also be improved by employing, for example, a synthetic resin fiber-reinforced with glass fiber or the like as a forming material of the outer bracket 14.

  The mounting cylinder portion 34 has a substantially square cylindrical shape with rounded corners, the inner peripheral surface is a stepped cylindrical surface, and the upper inner dimension is larger than the lower inner dimension, The upper part of the inner peripheral surface has a tapered shape that expands upward. Further, a stopper receiving portion 40 that protrudes to the outer peripheral side is provided on one of the left and right sides of the mounting cylinder portion 34, and the mounting cylinder portion 34 is partially thick on the circumference in the formation portion of the stopper receiving portion 40. Has been. The upper surface of the stopper receiving portion 40 is a flat surface extending in the substantially vertical direction.

  The mounting leg portion 36 projects in the front and rear direction and extends downward, and extends in the front and rear direction at the lower end. At the lower end portion of the mounting leg portion 36, a nut 42 is disposed by insert molding, and a screw thread is formed on the inner peripheral surface of the nut 42, and a screw hole penetrating vertically is provided. The front and rear mounting legs 36, 36 have a substantially front-rear symmetrical structure.

  The portal stopper portion 38 is a connecting portion that is provided so as to connect the front and rear eaves wall portions 44, 44 extending upward from the mounting cylinder portion 34 and the upper ends of the eaves wall portions 44, 44 to each other. And a top wall portion 46 as an integral part, and is generally in the form of a gate as a whole. Further, the pair of collar wall portions 44, 44 are provided on the periphery of the mounting cylindrical portion 34 outside the stopper receiving portion 40, and in the present embodiment, the stopper receiving portion 40 is the left and right in the mounting cylindrical portion 34. While being provided on one of the opposite sides in the direction, a pair of collar wall portions 44, 44 is provided on the opposite side in the front-rear direction of the mounting cylindrical portion 34.

  In the present embodiment, in the front and rear wall portions 44, 44, base end portions (lower portions) 48, 48 on the mounting cylinder portion 34 side are more than distal end portions (upper portions) 50, 50 on the top wall portion 46 side. The distance between the facing surfaces is increased, and the relief portions 51, 51 are formed on the inside of the base end portions 48, 48 of the wall portions 44, 44 so as to face each other. In the present embodiment, the relief portions 51 and 51 are formed in the base end portions 48 and 48 of the flange wall portions 44 and 44, so that in this embodiment, the flange wall portions 44 and 44 constituting the front and rear stoppers 98 and 98 described later. The distal portions 50, 50 of the 44 are thicker than the proximal portions 48,48.

  The outer bracket 14 integrally including the mounting cylinder portion 34, the front and rear mounting leg portions 36, 36, and the portal stopper portion 38 is formed by molding using a molding die 52 as shown in FIG. ing. That is, the forming material of the outer bracket 14 is injected and filled in the cavity 54 in a state in which the integrally vulcanized molded product 12 and the nuts 42 and 42 are set in the molding die 52 formed by combining a plurality of divided dies. Thus, the outer bracket 14 is formed in a state in which the mounting cylindrical portion 34 is fixed to the main rubber elastic body 18 of the integrally vulcanized molded product 12. Thereby, the inner mounting member 16 and the outer bracket 14 are elastically connected to each other by the main rubber elastic body 18.

  The main rubber elastic body 18 is continuously fixed to the mounting cylinder portion 34 of the outer bracket 14 over substantially the entire circumference, and a stopper receiver provided on a part of the circumference of the mounting cylinder portion 34. A bound buffer rubber 30 integrally formed with the main rubber elastic body 18 is fixed to the top surface of the portion 40, and the top surface of the stopper receiving portion 40 is covered by the bound buffer rubber 30.

  Further, a pair of left and right caulking members 56 are attached to the outer bracket 14. The caulking member 56 is formed separately from the outer bracket 14 by a material such as iron different from the outer bracket 14 and is a member excellent in plastic workability that can realize caulking and fixing described later. In this embodiment, a press fitting made of iron is used, and by being thin, bending in the thickness direction is made easy. The caulking member 56 has a base 58 at its upper end, as shown in FIG. The base portion 58 has a substantially rectangular plate shape extending in the front and rear direction, and in the present embodiment, locking holes 60, 60 penetrating in the thickness direction are formed.

  Furthermore, two plate-like projecting pieces 62 and 62 are integrally formed on the base 58. The two projecting pieces 62, 62 are disposed at a predetermined distance in the front and rear direction, and project downward at the front and rear end portions of the base 58. In the present embodiment, a pair of left and right caulking members 56, 56 independent of each other is adopted, but for example, the base is U-shaped in axial view and is continuous in the circumferential direction. The two projecting pieces 62, 62 are integrally formed in the left and right facing portions, so that the two projecting pieces 62, 62 may be provided on the left and right sides to form a crimping member as one component.

  The pair of caulking members 56 are disposed to be opposed to each other on the left and right, and are disposed in the cavity 54 of the molding die 52 when the outer bracket 14 is molded as shown in FIG. To be inserted. As a result, each base 58 is fixedly fixed to the mounting cylindrical portion 34 of the outer bracket 14 in an embedded state, and each projecting piece 62 protrudes downward from the mounting cylindrical portion 34 of the outer bracket 14 at least at the distal end portion. The members 56 and 56 are fixed to the outer bracket 14 in a partially embedded state in which the protruding pieces 62 protrude downward. In the present embodiment, each base 58 is entirely embedded in the mounting cylinder 34 of the outer bracket 14, and between the front and rear of the projecting pieces 62, 62 provided on each base 58, the lower side of the base 58 is the outer bracket 14. And prevent the caulking member 56 from coming off the outer bracket 14. Further, in the present embodiment, when the outer bracket 14 is formed, the locking holes 60, 60 formed in the base 58 are filled with the forming material, so that a part of the outer bracket 14 is inserted into the locking holes 60, 60. By being inserted and locked, the caulking member 56 is prevented from coming off from the outer bracket 14.

  As shown in FIG. 5, the partition member 64 and the flexible film 66 are attached to the integrally vulcanized molded product 12 and the outer bracket 14 by the caulking member 56.

  The partition member 64 is a member having a thick and large diameter substantially square plate shape, and has a structure in which a plate fitting 70 is attached to the partition member main body 68. The partition member main body 68 has a thick and substantially square plate shape, and a housing recess 72 opened on the upper surface is formed in the central portion, while circumferentially opening in the outer peripheral portion while opening on the upper surface The extending circumferential groove 74 is formed with a length less than one round. Although not shown in the drawing, a plurality of lower through holes are formed through the bottom wall portion of the housing recess 72 in the partition member main body 68, and the bottom wall portion of one end of the circumferential groove 74 A lower communication hole is formed.

  The metal plate 70 has a thin, substantially square plate shape and is superimposed on the upper surface of the partition member main body 68 to cover the upper openings of the housing recess 72 and the circumferential groove 74. Although not clearly shown in the figure, the metal plate 70 has an upper through hole formed in a portion covering the receiving recess 72 and an upper communication hole formed in a portion covering the other end of the circumferential groove 74. Has been. The metal plate 70 may be fixed to the partition member main body 68 by adhesion, mechanical engagement, or the like, or is overlapped with the partition member main body 68 in a non-adhering manner, and the main rubber elastic body 18. And the flexible film 66 described later.

  Further, the movable member 76 is accommodated in the accommodating recess 72 of the partition member main body 68 covered with the plate metal 70. The movable member 76 of the present embodiment is a cylindrical body having a substantially oval cross section, and is formed of a rubber elastic body. As the movable member 76, for example, JP-A-2013-148192, JP-A-2013-155817, JP-A-2013-210093, JP-A-2013-256980, JP-A 2013-256981, The structures disclosed in JP-A-2014-5857, JP-A-2014-31850 and the like can be suitably adopted.

  The partition member 64 provided with such a movable member 76 is inserted into the mounting cylinder portion 34 of the outer bracket 14, and the outer peripheral end portion of the upper surface is superimposed on the main rubber elastic body 18 in a contact state from below. In the present embodiment, a gap 77 is formed between the outer peripheral surface of the partition member 64 and the inner peripheral surface of the mounting cylinder portion 34 of the outer bracket 14, and the partition member 64 and the mounting cylinder portion 34 are not directly connected. There is no contact. Furthermore, the partition member 64 indirectly contacts the fixing member 78 described later with the flexible film 66 interposed therebetween, and is elastically supported by the main rubber elastic body 18 and the flexible film 66, It is indirectly supported by the outer bracket 14. However, the partition member 64 may be mounted in direct contact with the mounting cylindrical portion 34 of the outer bracket 14 and the fixing member 78.

  On the other hand, the flexible film 66 is a rubber film having a thin, substantially rectangular plate shape, and is easily allowed to deform in the thickness direction, and is given slack in the vertical direction. The flexible membrane 66 is attached so as to cover the lower part of the main rubber elastic body 18 by sandwiching the outer peripheral portion between the partition member 64 and the fixing member 78, and the lower opening of the outer bracket 14. Are occluded by the flexible membrane 66. The fixing member 78 is a highly rigid member made of metal such as iron, and is annular, and the outer peripheral end is a thick outer peripheral caulking portion 80 at the top and the bottom, and the inner peripheral portion is The inner circumferential sandwiching portion 82 is thinner than the outer circumferential caulking portion 80.

  The outer periphery caulking portion 80 of the fixing member 78 is caulked and fixed by the projecting pieces 62 of the caulking members 56, 56, and the outer peripheral end portion of the flexible film 66 is the inner peripheral clamping portion 82 of the fixing member 78 and the partition member 64. The flexible membrane 66 is attached to the outer bracket 14 by being sandwiched vertically between the outer bracket 14 and the outer bracket 14. More specifically, in a state in which the partition member 64, the flexible film 66, and the fixing member 78 are inserted between the caulking members 56 and 56 facing each other, the substantially flat plate-like projecting pieces 62 extending linearly in the vertical direction are bent. The lower end of each protruding piece 62 is bent into a tapered shape that inclines in the opposite direction of the pair of caulking members 56 and 56 as the lower part of each protruding piece 62 goes downward, and the opposite inner surface of each protruding piece 62 is the lower peripheral edge of the lower end of the fixing member 78 Abut. Thus, the outer peripheral caulking portion 80 of the fixing member 78 is sandwiched between the upper and lower portions of the mounting cylindrical portion 34 of the outer bracket 14 and the lower portions of the respective projecting pieces 62 of the caulking member 56, and caulking fixed at four places on the periphery Is done. In the present embodiment, the cover member is configured by the flexible film 66 and the fixing member 78.

  The caulking member is only required to be provided in a state of being fixed to the outer bracket and capable of attaching the lid member to the outer bracket directly or indirectly by caulking. The caulking process is one of the processing methods for joining a plurality of parts, and is performed by plastic working of caulking members. Therefore, in addition to caulking and fixing by bending as in the embodiment, caulking and fixing of a cylindrical caulking member by drawing and hollow or solid caulking projections made to project from the outer bracket are inserted into the lid member and caulking It is also possible to adopt caulking fixing by riveting or eyelet structure, caulking fixing by burring caulking or dabo caulking etc.

  By attaching the flexible film 66 in this manner, a fluid chamber 84 in which a part of the wall portion is configured by the main rubber elastic body 18 is formed between the main rubber elastic body 18 and the upper and lower sides of the flexible film 66. It is fluid-tightly defined, and the fluid chamber 84 contains an incompressible fluid. Furthermore, a partition member 64 is disposed in the fluid chamber 84, and the fluid chamber 84 is partitioned vertically by the partition member 64, and a part of the wall portion is configured by the main rubber elastic body 18 above the partition member 64. While the pressure receiving chamber 86 is formed using the large diameter recess 32, an equilibrium chamber 88 in which a part of the wall portion is formed of a flexible film 66 is formed below the partition member 64. Has been. In the present embodiment, the flexible membrane 66 is sandwiched between the partition member 64 and the fixing member 78 so that the caulking member 56 has a sealing structure on the inner peripheral side where the caulking fixing portion of the fixing member 78 is removed. Is provided to ensure fluid tightness of the fluid chamber 84. Although the non-compressible fluid sealed in the fluid chamber 84 including the pressure receiving chamber 86 and the equilibrium chamber 88 is not particularly limited, for example, water, ethylene glycol, alkylene glycol, polyalkylene glycol, silicone oil, Alternatively, a liquid such as a mixed solution thereof is desirable, and a low-viscosity fluid of 0.1 Pa · s or less is more preferably used.

  Further, the upper opening of the circumferential groove 74 is covered with the plate fitting 70 to form a tunnel-like flow path, and one end of the tunnel-like flow path is connected to the pressure receiving chamber 86 through the upper communication hole not shown. The other end of the circumferential groove 74 is in communication with the balance chamber 88 through a lower communication hole (not shown). Thus, an orifice passage 90 that connects the pressure receiving chamber 86 and the equilibrium chamber 88 to each other is formed by the circumferential groove 74. Then, due to the vertical vibration input between the inner mounting member 16 and the outer bracket 14, the internal pressure of the pressure receiving chamber 86 fluctuates relative to the internal pressure of the equilibrium chamber 88, so that the pressure receiving chamber 86 is balanced through the orifice passage 90. Fluid flow is created between the chambers 88. As a result, the anti-vibration effect based on the flow action such as the resonance action of the fluid is exhibited. In addition, the orifice passage 90 adjusts the ratio (A / L) of the passage cross-sectional area (A) to the passage length (L) while taking into consideration the wall spring rigidity of the fluid chamber 84, so that A certain tuning frequency is appropriately set. For example, the tuning frequency is tuned to a low frequency vibration of about 10 Hz corresponding to an engine shake.

  Further, the pressure of the pressure receiving chamber 86 is exerted on the upper surface of the movable member 76 through the upper through hole, and the pressure of the equilibrium chamber 88 is exerted on the lower surface of the movable member 76 through the lower through hole. The relative pressure fluctuation between the chamber 86 and the balance chamber 88 causes the movable member 76 to be displaced up and down in the housing recess 72, thereby achieving a low spring based on the hydraulic pressure absorbing action. In particular, the fluid pressure absorbing action by the movable member 76 is effectively exerted against a small amplitude vibration input having a frequency higher than the tuning frequency of the orifice passage 90. In the shutoff state, significant increase in dynamic spring is avoided, and the intended vibration isolation effect is exhibited. On the other hand, the displacement of the movable member 76 is restricted by the contact with the partition member 64 with respect to the input of the engine shake, which is a low-frequency large-amplitude vibration, so that the internal pressure fluctuation of the pressure receiving chamber 86 is effectively induced. The fluid flow through the orifice passage 90 tuned to a low frequency is efficiently generated.

  In the engine mount 10 according to the present embodiment, the inner mounting member 16 is one of the members constituting the vibration transmission system via the inner bracket 92 which is fitted into the fitting portion 20 via the covering rubber layer 24. The mounting legs 36 and 36 of the outer bracket 14 are attached to a certain power unit (not shown), and the other member constituting the vibration transmission system by bolts (not shown) screwed to the nuts 42 and 42. It can be attached to a certain vehicle body (not shown).

  The inner bracket 92 is disposed so as to protrude in one opening direction of the fitting portion 20 with respect to the inner mounting member 16, and a projecting portion of the inner bracket 92 is a stopper receiving portion in the mounting cylindrical portion 34 of the outer bracket 14 It is arranged to face up and down with 40. The specific structure of the inner bracket 92 is merely an example and is not particularly limited. However, the inner bracket 92 is a highly rigid member formed of metal, synthetic resin, or the like. A projecting portion 94 constituting 96 projects downward toward the stopper receiving portion 40 of the outer bracket 14.

  In such a mounted state on the vehicle, the engine mount 10 of the present embodiment includes upper and lower and front and rear stoppers.

  That is, the projecting portion 94 of the inner bracket 92 fixed to the inner mounting member 16 and the stopper receiving portion 40 of the mounting cylinder portion 34 of the outer bracket 14 are disposed to face each other with a predetermined distance therebetween. Further, a bound stopper 96 that limits the amount of relative displacement of the inner mounting member 16 with respect to the outer bracket 14 downward is configured by the contact between the projecting portion 94 of the inner bracket 92 and the stopper receiving portion 40 of the outer bracket 14.

  Further, a bound buffer rubber 30 integrally formed with the main rubber elastic body 18 is fixed to the upper surface of the stopper receiving portion 40 of the outer bracket 14, and the contact surface of the bound stopper 96 on the outer bracket 14 side is a bound buffer. Covered by rubber 30.

  Further, the fitting portion 20 of the inner mounting member 16 and the wall portions 44 and 44 of the gate-shaped stopper portion 38 of the outer bracket 14 are disposed to face each other at a predetermined distance in the front and rear direction. And as a side stopper which limits the relative displacement amount to the front bracket 14 with respect to the outer bracket 14 of the inner attachment member 16 by contact with the fitting part 20 of the inner attachment member 16 and the collar wall parts 44 and 44 of the outer bracket 14 Front and rear stoppers 98, 98 are configured.

  Further, front and rear buffer rubbers 26 as second buffer rubbers integrally formed with the main rubber elastic body 18 are fixed to both front and rear outer surfaces of the fitting portion 20 of the inner mounting member 16, and front and rear stoppers 98 and 98. The contact surfaces on the inner mounting member 16 side in the above are covered by the front and rear buffer rubbers 26.

  Further, the fitting portion 20 of the inner mounting member 16 and the top wall portion 46 of the portal stopper portion 38 of the outer bracket 14 are arranged to face each other with a predetermined distance therebetween. And the rebound stopper 100 which restrict | limits the upper relative displacement amount with respect to the outer bracket 14 of the inner mounting member 16 by contact | abutting with the fitting part 20 of the inner mounting member 16 and the ceiling wall part 46 of the outer bracket 14 is comprised. .

  Furthermore, a rebound shock absorbing rubber 28 as a second shock absorbing rubber integrally formed with the main rubber elastic body 18 is fixed on the upper and outer surfaces of the fitting portion 20 of the inner mounting member 16. The contact surface on the member 16 side is covered with a rebound shock absorbing rubber 28. In the present embodiment, each of the bound buffer rubber 30 provided on the bound stopper 96, the front and rear buffer rubbers 26 and 26 provided on the front and rear stoppers 98 and 98, and the rebound buffer rubber 28 provided on the rebound stopper 100 The elastic body 18 is integrally formed.

  According to the engine mount 10 having the structure according to the present embodiment, the outer bracket 14 is made of synthetic resin, so that the weight reduction of the outer bracket 14 can be realized. Since the outer peripheral surface of the main rubber elastic body 18 is directly fixed to the outer bracket 14, compared to the structure in which the outer bracket 14 is indirectly attached to the main rubber elastic body 18 via the outer mounting member, The structure can be simplified and the weight can be reduced by omitting the outer mounting member.

  Further, the bounding stopper 96 is configured by the abutment of the stopper receiving portion 40 of the outer bracket 14 and the projecting portion 94 of the inner bracket 92, and the amount of relative displacement of the inner mounting member 16 downward with respect to the outer bracket 14 is limited. Thereby, the excessive deformation of the main rubber elastic body 18 is prevented, and the durability can be improved. Further, since the upper surface of the stopper receiving portion 40 constituting the bound stopper 96 is covered with the bound cushion rubber 30, the hitting sound caused by the contact between the inner bracket 92 and the outer bracket 14 is reduced in the bound stopper 96.

  Further, the front and rear stoppers 98 and 98 are constituted by the abutment of the pair of flanges 44 and 44 of the outer bracket 14 and the inner mounting member 16, and the front and rear stoppers 98 and 98 constitute front and rear for the outer mounting bracket 14 The amount of relative displacement in the direction is limited, and the amount of deformation of the main rubber elastic body 18 is limited. Furthermore, since the front and rear outer surfaces of the inner mounting member 16 constituting the front and rear stoppers 98 and 98 are covered by the front and rear buffer rubbers 26 and 26, the front and rear stoppers 98 and 98 are in contact with the inner mounting member 16 and the outer bracket 14. The hitting sound is reduced.

In addition, the rebound stopper 100 is configured by the contact between the top wall portion 46 of the outer bracket 14 and the inner mounting member 16, and the amount of relative displacement of the inner mounting member 16 upward relative to the outer bracket 14 is limited by the rebound stopper 100. Thus, the deformation amount of the main rubber elastic body 18 is limited. Furthermore, since the outer surface on the inner mounting member 16 is covered Therefore rebound cushion rubber 2 8, in the rebound stopper 100 striking noise due to the contact of the inner mounting member 16 and the outer bracket 14 reduces constituting a rebound stopper 100 Be done.

  As described above, the upper and lower stoppers 96 and 100 and the front and rear stoppers 98 and 98 are all constituted by the outer bracket 14, and not only the anti-vibration target structure where only the upper and lower or front and rear inputs are assumed, The engine mount 10 according to the present invention can be suitably applied to a vibration reduction target structure in which inputs in a plurality of directions such as upper and lower are assumed.

  Further, in the present embodiment, the buffer rubbers 30, 26, 26, 28 in the respective stoppers 96, 98, 98, 100 are all integrally formed with the main rubber elastic body 18, and the stoppers in each direction with a small number of parts. In 96, 98, 98 and 100, a buffering action is exhibited.

  Furthermore, in the engine mount 10, since the outer bracket 14 is post-formed and fixed to the integrally vulcanized molded article 12 of the main rubber elastic body 18, a bound buffer rubber 30 integrally formed with the main rubber elastic body 18 Can be fixed to the outer bracket 14. Thereby, generation | occurrence | production of the noise by a hit | damage or rubbing etc. is prevented between the bound shock absorbing rubber 30 and the outer bracket 14, and the buffer action of the target bound shock absorbing rubber 30 is stably exhibited.

  Further, in the outer bracket 14 of the present embodiment, the distance between the facing surfaces of the pair of wall portions 44, 44 is increased at the proximal end portions 48, 48 provided with the relief portions 51, 51. 51, the distance between the facing surfaces of the pair of collar wall portions 44, 44 is smaller than that of the proximal end portions 48, 48 at the distal end portions 50, 50 above. Thereby, the elastic deformation to the outside of the main rubber elastic body 18 is sufficiently allowed by the escape portions 51, 51 formed on the opposite inner sides of the base end portions 48, 48 of the pair of collar wall portions 44, 44. In tip portions 50 and 50 which are components of the front and rear stoppers 98 and 98, the stopper clearance of the front and rear stoppers 98 and 98 can be adjusted with a large degree of freedom.

  The caulking member 56 for attaching the flexible film 66 and the partition member 64 is a separate part made of a material different from that of the outer bracket 14 and is fixed to the outer bracket 14 when the outer bracket 14 is molded. Accordingly, the flexible film 66 and the partition member 64 can be easily attached by the caulking member 56 while further reducing the weight by forming the outer bracket 14 from a synthetic resin. In particular, the outer bracket 14 that requires high rigidity by molding can be advantageously formed, and the thin projecting piece 62 that is difficult to form by molding and has excellent bending workability can be projected from the outer bracket 14. As described above, the characteristics such as high rigidity and weight reduction required for the outer bracket 14 and the characteristics such as processability required for caulking and fixing at the caulking member 56 and sufficient strength in thin wall are both achieved at a high level. Can be realized.

  Furthermore, the caulking member 56 can be firmly attached to the outer bracket 14 by fixing the base portion 58 of the caulking member 56 to the outer bracket 14 in an embedded state. In the present embodiment, in particular, the outer bracket 14 is fixed in a state in which a part of the outer bracket 14 is inserted into the locking holes 60, 60 of the base 58, and the detachment of the caulking member 56 from the outer bracket 14 is more advantageously prevented. . In addition, since the caulking member 56 is fixed to the outer bracket 14 in a partially embedded state when molding the outer bracket 14, caulking is performed by attaching the caulking member 56 to the molding die 52 when molding the outer bracket 14. There is no need for a special mounting process of the member 56.

  Furthermore, by fixing the caulking member 56 to the hard outer bracket 14, the caulking member 56 can be positioned with high accuracy with respect to the outer bracket 14. As a result, the flexible film 66 and the partition member 64 attached to the outer bracket 14 can be stably attached to the outer bracket 14 at appropriate positions via the caulking member 56.

  Further, in the present embodiment, since the pair of left and right caulking members 56 are provided independently of each other, the outer bracket 14 is molded as compared with the case where the caulking members are continuous over the entire circumference. Deformation or damage of the caulking member 56 caused by thermal contraction or the like does not easily become a problem.

  An engine mount 110 according to a second embodiment of the present invention is shown in FIGS. The engine mount 110 is a solid type vibration damping device, and includes an integrally vulcanized product 12 and an outer bracket 112. In the following description, parts substantially the same as those in the first embodiment will not be described by giving the same reference numerals in the drawings.

  More specifically, the integrally vulcanized molded product 12 of the present embodiment has the same structure as that of the first embodiment in which the main rubber elastic body 18 is vulcanized and bonded to the inner mounting member 16.

  Similar to the first embodiment, the outer bracket 112 includes a mounting cylinder portion 114 as a fixing portion fixed to the main rubber elastic body 18 and a pair of ribs as opposing portions protruding upward from the mounting cylinder portion 114. Part 44 and 44 and a top wall part 46 as a connecting part for connecting the upper ends of the pair of wall parts 44 and 44 to each other, and the mounting cylinder part 114 has a pair of front and rear mounting legs. Portions 36 and 36 are provided.

  Further, the mounting tube portion 114 of the outer bracket 112 of the present embodiment is not provided with the caulking members 56, 56 as in the first embodiment. That is, as shown in FIG. 15, during the injection molding of the outer bracket 112, the integrally vulcanized molded product 12 of the main rubber elastic body 18 is set in the molding die 116, while the crimping of the main molding elastic member 116 is performed. There is no recess for setting the members 56, 56 and the caulking members 56, 56 are not set in the molding die 116. As a result, the outer bracket 112 is not provided with the caulking members 56 and 56, and a solid engine mount 110 in which the fluid is not enclosed is configured.

  Also in the engine mount 110 according to this embodiment, as in the engine mount 10 of the first embodiment, a bound stopper 96, front and rear stoppers 98 and 98 as side stoppers, and a rebound stopper 100 are configured. Is done. Further, also in this embodiment, the bound cushion rubber 30 as the first cushion rubber is fixed to the upper surface of the stopper receiving portion 40 constituting the bound stopper 96, and the inner mounting member constituting the front and rear stoppers 98, 98 is also provided. Front and rear cushioning rubbers 26 and 26 as second cushioning rubbers are fixed to the front and rear surfaces of the 16 fitting parts 20, and the second is attached to the upper surface of the fitting part 20 of the inner mounting member 16 constituting the rebound stopper 100. A rebound shock absorbing rubber 28 is fixed as a shock absorbing rubber. Furthermore, the bound buffer rubber 30, the front and rear buffer rubbers 26, 26, and the rebound buffer rubber 28 are all integrally formed with the main rubber elastic body 18.

  Also in the engine mount 110 according to this embodiment, the same effect as the engine mount 10 of the first embodiment is exhibited. In addition, as compared with the engine mount 10 of the first embodiment, the structure is further simplified because it does not have a structure for enclosing a fluid.

  The solid engine mount 110 shown in the present embodiment is partially common to the fluid-sealed engine mount 10 shown in the first embodiment, and the fluid of the solid engine mount 110 and the fluid is shown. The enclosed engine mount 10 can be selectively made in the middle of the manufacturing process.

  That is, the solid type engine mount 110 according to the present embodiment can be manufactured by a manufacturing method including the following steps, for example. First, the inner mounting member 16 prepared in advance is set in a molding die (not shown) for the main rubber elastic body 18 (not shown), and the inner rubber elastic body 18 is vulcanized to provide the inner mounting member 16. The integrally vulcanized molded product 12 of the main rubber elastic body 18 is formed. Thus, the vulcanization molding process is completed.

  Next, the integrally vulcanized molded product 12 obtained in the vulcanization molding step and the nuts 42 and 42 prepared in advance are set in the molding die 116 of the outer bracket 112, and the outer bracket 112 is injection molded. Thereby, the outer bracket 112 in a state where the mounting cylinder portion 114 is fixed to the main rubber elastic body 18 is formed, the bracket forming process is completed, and the manufacturing process of the engine mount 110 according to the present embodiment is completed.

  Here, in the above-mentioned bracket forming step, a forming metal that is a mold for a fluid-sealed structure that forms the outer bracket 14 of the fluid-sealed structure shown in the first embodiment. Instead of the mold 116, the second external mold 14 is injection molded with the outer bracket 14 in a state in which the integrally vulcanized product 12 and the nuts 42, 42 are added to the molding die 52 and the caulking members 56, 56 are set. The fluid-filled engine mount 10 according to the first embodiment can be manufactured in place of the solid engine mount 110 according to the embodiment. In short, in the present invention, the integrally vulcanized molded article 12 is the fluid-sealed engine mount 10 shown in the first embodiment and the solid (non-fluid-sealed) engine mount 110 shown in the second embodiment. It can be selectively formed while sharing it.

  When manufacturing the fluid-sealed engine mount 10 shown in the first embodiment, for example, the partition member 64 provided with the movable member 76, the flexible film 66, and the fixing member after the completion of the bracket forming process The process of manufacturing the engine mount 10 is completed after the fluid sealing process of caulking and fixing the steel plate 78 in the water tank filled with the incompressible fluid by the caulking members 56, 56.

  Further, not only can the common vulcanized molded product 12 of the main rubber elastic body 18 be shared, but also the molding apparatus for the outer brackets 14 and 112 can be shared. That is, in the solid engine mount 110 and the fluid-sealed engine mount 10, the basic structure of the outer brackets 14 and 112 is common, and it is possible to selectively change some members such as the caulking members 56 and 56. It can correspond to manufacturing. Therefore, it is also possible to share and share some of the outer bracket molding dies.

  Furthermore, by employing the same resin molding die, it is possible to achieve the same molding equipment and molding process of the outer bracket in the solid type vibration damping device and the fluid filled vibration damping device. In addition, by sharing the basic structure and manufacturing process in this way, it becomes possible to share the design related to the strength and durability of the resin outer bracket, which overlaps the design, prototyping, and testing processes. A great practical effect that labor can be reduced is achieved.

  If the outer bracket of the solid vibration isolator and the fluid-filled vibration isolator are formed with the same molding die (molding die for the outer bracket of the fluid-filled vibration isolator), the solid type When molding the outer bracket in the vibration damping device, in the fluid-filled vibration damping device, the sandwiching and fixing area set for sandwiching and fixing the caulking metal fitting (crimping member) with the molding die and forming the synthetic resin Can be considered. In such a case, for example, post-processing cutting out the entering synthetic resin or setting a temporary member for preventing resin entry before resin molding in the molding die for the outer bracket, and after resin molding By removing the temporary member, it is possible to form the outer bracket in the solid-type vibration damping device using the same molding die (molding die for the outer bracket of the fluid-filled vibration damping device). .

  Although the embodiments of the present invention have been described above in detail, the present invention is not limited by the specific description. For example, the outer bracket 14 can be further reduced in weight by appropriately forming a thin hole such as a hole or a recess in the outer bracket 14. Similarly, the inner bracket 92 can also be reduced in weight by lightening.

  Further, the fixing portion of the outer bracket is preferably cylindrical, but is not limited, and may be, for example, a semi-cylindrical shape or a groove shape having an opposed arrangement portion to which the main rubber elastic body is fixed. Further, the shape of the main rubber elastic body fixed to the fixing portion is not limitedly interpreted by the embodiment, and for example, it is not necessary to be fixed to the fixing portion of the outer bracket over the entire circumference.

  In addition, the buffer rubber (bound buffer rubber 30 of the embodiment) in the bound stopper 96 may not necessarily be fixed to the outer bracket 14, and is formed separately from the main rubber elastic body 18 and on the inner bracket 92 side. Can be fixed. Further, the cushion rubbers (front and rear cushion rubbers 26 and 26 and rebound cushion rubber 28 of the embodiment) in the front and rear stoppers 98 and 98 and the rebound stopper 100 are formed separately from the main rubber elastic body 18 and are disposed on the outer bracket 14 side. Can be provided.

  Further, the structure of the inner mounting member is not limited to that of the above embodiment. Specifically, for example, a metal fitting having the same structure as the inner bracket 92 of the embodiment is vulcanized and adhered to the main rubber elastic body 18, and the inner attachment member is fixed by the fixing portion of the metal fitting to the main rubber elastic body 18. In addition to the configuration, a structure in which the inner bracket is configured by the protruding portion from the main rubber elastic body 18 of the metal fitting and the inner mounting member and the inner bracket are integrated may be employed.

  Although the example which applied the vibration-proof apparatus based on this invention to the engine mount was shown in the said embodiment, a vibration-proof apparatus can be applied also to a member mount, a body mount, etc. FIG. Furthermore, the scope of application of the present invention is not limited to the vibration isolation device for automobiles, and can be suitably applied to a vibration isolation device used for motorcycles, railway vehicles, industrial vehicles and the like.

10, 110: Engine mount (anti-vibration device), 12: Integrally vulcanized molded product, 14, 112: Outer bracket, 16: Inner mounting member, 18: Body rubber elastic body, 26: Front and rear buffer rubber (second buffer Rubber), 18: rebound shock absorbing rubber (second shock absorbing rubber), 30: bounce shock absorbing rubber (first shock absorbing rubber), 34, 114: mounting cylindrical portion (sticking portion), 40: stopper receiving portion, 48; Wall part (facing part), 50: Top wall part (connection part), 51: Relief part, 52, 116: Mold for molding, 90: Inner bracket, 96: Bound stopper, 98: Front and rear stopper, 100: Rebound stopper

Claims (5)

The inner mounting member attached to one member constituting the vibration transmission system and the synthetic resin outer bracket attached to the other member constituting the vibration transmission system have a structure in which they are elastically connected by the main body rubber elastic body. In the vibration control device that
The outer bracket includes a fixing portion directly fixed to the main rubber elastic body, a pair of opposing portions protruding from the fixing portion and opposed to each other with the inner mounting member interposed therebetween, and the pair of opposing portions. A connecting portion that is mutually connected on the tip end side projecting from the fixing portion and faces the inner mounting member,
A bound stopper that limits a relative displacement amount of the inner mounting member and the outer bracket is configured by contact between the fixing portion and an inner bracket that extends laterally from the inner mounting member, and the pair of opposing portions A side stopper that restricts the relative displacement amount of the inner mounting member and the outer bracket is configured by the contact of the inner mounting member, and the inner mounting member and the outer are further configured by the contact of the connecting portion and the inner mounting member. While a rebound stopper is configured to limit the relative displacement of the bracket ,
The large-diameter side end of the main rubber elastic body has a substantially rectangular shape, and the outer bracket has a larger distance between the opposed surfaces than the constituent parts of the side stopper on the inner surface of the opposed portion. The step-shaped relief portion is provided so as to extend linearly along a pair of linear outer peripheral portions at the large-diameter side end portion of the main rubber elastic body that is rectangular. Anti-vibration device. The fixing portion is cylindrical,
A part of the periphery of the adhering part is a stopper receiving part that constitutes the bound stopper, and the pair of opposing parts are provided on a part of the periphery of the adhering part that is separated from the stopper receiving part. The vibration control device according to claim 1.   The first buffer rubber integrally formed with the main rubber elastic body is fixed to a portion constituting the bound stopper by abutting on the inner bracket in the fixed portion, according to claim 1 or 2 Anti-vibration device.   The inner mounting member is integrally formed with the main rubber elastic body in a portion constituting the side stopper by abutting on the pair of opposing portions and in a portion constituting the rebound stopper by abutting on the connecting portion. The anti-vibration device according to any one of claims 1 to 3, wherein the second buffer rubber is fixed. A method for manufacturing a vibration isolator according to any one of claims 1 to 4 ,
A vulcanization molding step for forming an integrally vulcanized molded product of the main rubber elastic body provided with the inner mounting member;
The outer rubber bracket is injection-molded in a state where the integrally vulcanized molded product of the main rubber elastic body is set in a molding die for the outer bracket, so that the fixing portion is fixed to the main rubber elastic body. A bracket forming step for forming the outer bracket,
In the bracket molding step, by selecting the molding die of the outer bracket for setting the integrally vulcanized molded product of the main rubber elastic body, a solid type vibration isolator and a fluid filled type vibration isolator A method of manufacturing a vibration-damping device, characterized in that it is selectively manufactured by the integral vulcanized molded article of the common main rubber elastic body.

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