JP2002122177A - Vibration isolator, and method of manufacturing vibration isolator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assembling while securing sealing performance. SOLUTION: On the inner side of an outer cylinder metal fitting 12, an inner metal fitting 16 is disposed, and these are connected to each other by an elastic body 14. An engagement part 16A of the outer cylinder metal fitting 16 is covered with a seal rubber 14A extended from a main body part of the elastic body 14. Protruded parts 28 protruded toward the engagement part 16A are provided in an axial direction of the outer cylinder metal fitting 16 in the number of 3-10 along a circumferential direction of the outer cylinder metal fitting 16 without being covered with the seal rubber 14A. A partition wall member 34 is engaged with an inner wall surface of the seal rubber 14A of the elastic body 14 while it is engaged with the protruded parts 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device applied to prevent transmission of vibration from a vibration generating section, and a method of manufacturing such an anti-vibration device. And can be applied to mounts that support members such as an engine that generate vibration.

[0002]

2. Description of the Related Art For example, a vibration isolator as an engine mount is provided between an engine serving as a vibration generating portion of a vehicle and a vehicle body serving as a vibration receiving portion. Is absorbed and is prevented from being transmitted to the vehicle body.

As one example, the following vibration isolator is known. In other words, between the outer cylinder fitting and the inner fitting,
A rubber elastic body is disposed, and a partition member that partitions a liquid chamber provided between the diaphragm and the elastic body disposed in the outer cylinder into a pair of liquid chambers is provided in the liquid chamber. For example, this vibration isolator has a structure as described in Japanese Patent Application Laid-Open No. Hei 6-330981. Therefore, when vibration is generated by the operation of the mounted engine, the vibration is absorbed by the vibration damping function of the elastic body and the viscous resistance of the liquid flowing between the two liquid chambers, and the transmission of the vibration is prevented. It is supposed to.

On the other hand, when manufacturing such a conventional vibration isolator, a stepped portion is formed at an intermediate portion of the outer cylinder in the axial direction, and a partition member inserted into the outer cylinder is provided. Is placed on the stepped portion to position the partition member in the outer tube fitting.

[0005]

However, in order to seal the entire space between the partition member and the outer cylindrical member in the circumferential direction, a seal rubber is disposed at a portion of the outer cylindrical member where the partition member is mounted. Due to the elasticity of the seal rubber, the partition member is easily moved, and there is a disadvantage that the partition member is difficult to position, and the assemblability of the vibration isolator is low. In addition, there is a possibility that the seal rubber is settled due to a change over time, and a gap is generated between the partition wall member and the outer cylindrical metal member, and there is a possibility that the reliability of the seal is reduced. The present invention takes into account the above facts,
It is an object of the present invention to provide a vibration isolator and a method for manufacturing the vibration isolator, which can improve assemblability while ensuring sealing performance.

[0006]

According to a first aspect of the present invention, there is provided a vibration isolator connected to one of a vibration generator and a vibration receiver, and a first support member connected to the other of the vibration generator and the vibration receiver. A second support member, an elastic body disposed between the support members and connecting the support members so as to be elastically deformable, a liquid chamber in which a liquid is sealed with the elastic body as a part of a wall surface, A fitting portion provided on the support member with an enlarged diameter and whose inner peripheral surface is covered by a seal rubber extending from the elastic body; and a fitting portion along the axial direction of the second support member without being covered by the seal rubber. The projection partly protruding to the side and the projection are positioned along the axial direction of the second support member, and are fitted to the second support member via the seal rubber to partition the liquid chamber. And a partition member to be fixed.

The operation of the vibration isolator according to claim 1 will be described below. When vibration is transmitted from the vibration generating section connected to any of the support members, the elastic body disposed between the two support members is elastically deformed and the vibration is attenuated by the elastic body. As a result, when the vibration is transmitted from the vibration generating unit side, the vibration is reduced by the deformation of the elastic body, and the vibration is hardly transmitted to the vibration receiving unit side.

Further, a partition member partitions the liquid chamber in which the liquid is sealed with the elastic body as a part of the wall surface, and the liquid flows between the partitioned liquid chambers to further vibrate due to the viscous resistance of the liquid. Is reduced. On the other hand, the inner peripheral surface of the fitting portion provided on the second support member with the diameter increased is covered with a seal rubber extending from the elastic body. Further, the partition member is positioned along the axial direction of the second support member by the protrusion which is not covered with the seal rubber and partially projects toward the fitting portion along the axial direction of the second support member. Thus, the partition member is fitted and fixed to the second support member via the seal rubber.

Therefore, in the vibration isolator according to the present invention, although the projection not covered with the seal rubber is provided so as to protrude toward the fitting portion, the projection is partially provided. The rubber material extends from the elastic body through the portion, and the seal rubber can be arranged on the inner peripheral surface of the fitting portion. Furthermore, since the projection of the second support member on which the partition member is placed is not covered with the seal rubber, the partition member can be easily positioned, the assemblability of the vibration isolator is improved, and the seal rubber is changed over time. There is no longer a possibility that a gap is formed between the partition member and the second support member, and the reliability of the seal is improved.

The operation of the vibration isolator according to claim 2 will be described below. The present invention has a configuration similar to that of the first aspect and performs the same operation. However, the present invention has a configuration in which the distal end of the projection is located so as to protrude toward the inner peripheral side of the second support member from the fitting portion. Therefore, the width of the surface of the projection for positioning the partition member is wider than the width of the fitting portion, so that the partition member can be more stably positioned and fixed.

The operation of the vibration isolator according to claim 3 will be described below. The present invention has the same configuration as that of the first and second aspects and performs the same operation. However, in this claim, 3 to
It has a configuration in which ten protrusions are provided along the circumferential direction of the second support member. Therefore, by setting the number of the protrusions to at least three or more, the partition member can be fixed at the surface connecting at three or more points, so that the partition member can be more stably positioned and fixed. In addition, since the projection serves as a reinforcing rib of the second support member, the strength of the second support member can be increased by increasing the number of projections.

The operation of the vibration isolator according to claim 4 will be described below. The present invention has a configuration similar to that of claims 1 to 3 and exerts a similar operation. However, in the present invention, at both ends of the partition member, the partition member is provided with a distal flange portion and a proximal flange portion formed so as to expand outward, respectively, and a passage is formed between the seal rubber and the partition member. The partition member is disposed in the seal rubber so as to be sealed over the entire periphery of both ends of the seal rubber. Therefore, the flanges are provided at both ends of the partition member, and the passage is formed between the seal rubber and the partition member. Therefore, the liquid can flow between the liquid chambers defined by the partition member by the passage. Become like

According to a fifth aspect of the present invention, there is provided a method for manufacturing a vibration isolator, comprising: forming a first support member and a second support member;
When connecting the support member and the second support member with an elastic body so as to be elastically deformable, the second support member is provided with a fitting portion with an enlarged diameter, and the seal rubber is extended from the elastic body. The inner peripheral surface of the fitting portion is covered, and a projection is provided on the fitting portion side along the axial direction of the second support member without being covered with the seal rubber. A partition member capable of partitioning the seal member is prepared, and then the partition rubber member is press-fitted into the second support member, whereby the sealing rubber is removed while the protrusion is positioned along the axial direction of the second support member. It is characterized in that the space between these partition members and the second support member is sealed through the intervening member.

The operation of the method for manufacturing a vibration isolator according to claim 5 will be described below. When a first support member and a second support member are produced and the first support member and the second support member are connected by an elastic body so as to be elastically deformable, by a seal rubber extending from the elastic body, The inner peripheral surface of the fitting portion provided with an enlarged diameter on the second support member is covered, and the protrusion is fitted along the axial direction of the second support member without being covered by the seal rubber. It protrudes to the side of the part. Further, a partition member capable of partitioning the liquid chamber is produced, and by press-fitting the partition member into the second support member, the protrusion is positioned along the axial direction of the second support member, thereby sealing rubber. The space between the partition member and the second support member is sealed through the intervening member.

Therefore, in the method of manufacturing a vibration isolator according to the present invention, similarly to the first aspect, the rubber material extends from the elastic body through a portion other than the protrusion, and the seal rubber is attached to the inner periphery of the fitting portion. And the protrusions facilitate positioning of the partition member to improve the assemblability of the vibration isolator, and the seal rubber is settled due to aging to allow the partition member and the second support member to be in contact with each other. There is no possibility that there is a gap between them, and the reliability of the seal is improved.

The operation of the method for manufacturing a vibration isolator according to claims 6 to 8 will be described below. These claims have a configuration similar to that of claim 5 and exert a similar effect. However, in claim 6, when the second support member is manufactured, the protrusion has a configuration in which the protrusion projects from the fitting portion toward the inner peripheral side of the second support member. It will work similarly. According to a seventh aspect of the present invention, when the second support member is manufactured, three to ten protrusions are provided along the circumferential direction of the second support member. Will work in the same way. Further, in the eighth aspect, when the partition member is manufactured, the distal end flange portion and the proximal end flange portion are formed at both ends of the partition member so as to extend outward, respectively. Item 4
Will work in the same way.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 5 show an embodiment of a vibration isolator and a method of manufacturing the vibration isolator according to the present invention, and the present embodiment will be described with reference to these drawings. As shown in FIG. 1 showing the present embodiment, an outer cylindrical metal part 16 having a cylindrical portion on the outer peripheral side of the vibration isolator 10 is configured. A lower part of the outer tube fitting 16 is provided with the outer tube fitting 16.
A bottom surface 16B serving as a lower surface of the bottom surface is provided, and a through hole 20 is formed in the center of the bottom surface 16B. A fitting portion 16 </ b> A formed by expanding the outer diameter so as to be one step larger than the lower side of the outer cylindrical fitting 16 is provided in a portion closer to the upper side of the outer cylindrical fitting 16. The upper end side of the fitting portion 16A has an open structure.

An outer peripheral surface of a rubber elastic body 14 formed in a cylindrical shape is vulcanized and adhered to an inner peripheral surface of the outer cylindrical bracket 16. The outer cylindrical bracket 16 surrounds the elastic body 14. It is in the form of holding. The portion of the elastic body 14 corresponding to the upper side of the outer tube fitting 16 including the fitting portion 16A is formed as a thin rubber seal 14A extending from the main body of the elastic body 14, and the seal rubber 14A is Fitting part 1
6A covers the entire inner peripheral surface. Further, in order to increase the adhesive strength of the seal rubber 14A to the fitting portion 16A, the seal rubber 14A is connected to the outer cylindrical metal fitting through a hole 18 (shown in FIGS. 3 and 5) formed in the fitting portion 16A. 16 also covers the outer peripheral side.

However, the fitting portion 16A partially protrudes toward the fitting portion 16A along the axial direction (the direction of the arrow Y in FIGS. 1 and 2) of the outer cylindrical member 16 without being covered with the seal rubber 14A. As shown in FIGS. 3 to 5, three to ten protrusions 28 are provided along the circumferential direction of the outer tube fitting 16. Along with this, the surface of the seal rubber 14A covering the lower end of the fitting portion 16A is located substantially the same as or slightly lower than the flat top surface of the projection 28 in the axial direction of the outer cylinder 16. ing. 3 to 5, the projection 28 is connected to the outer cylinder 16 by the fitting portion 16A.
Has a structure protruding also on the inner peripheral side.

Further, the elastic body 1 on the inner peripheral side of the outer cylinder fitting 16 is provided.
A metal inner fitting 12 is partially embedded in the center of the base 4 while being vulcanized and adhered. A lower portion of the inner fitting 12 projects downward from the elastic body 14 and passes through the above-described through hole 20. I have. The inner metal fitting 12 is provided with a screw hole 12B in which a female screw is formed. At a position immediately above the inner metal fitting 12, a contact metal fitting 22 whose outer peripheral side is embedded in the elastic body 14 is provided. It is arranged while being in contact with the inner metal fitting 12.

As described above, the inner fitting 12 protruding from the elastic body 14 is used for connection to an engine (not shown), and the inner fitting 12 is connected to the engine via an arm (not shown) screwed into the screw hole 12B. It will be connected to the engine that will be the vibration generator. Further, the outer cylinder fitting 16 is connected to a vehicle body serving as a vibration receiving portion by fitting the outer cylinder fitting 16 to a vehicle body (not shown), and the vibration isolator 10 is fixed to the vehicle body. For this reason, the inner metal fitting 12 is used as a first support member connected to the vibration generating unit, and the outer cylindrical metal fitting 1 is provided.
6 is a second support member connected to the vibration receiving portion.

On the other hand, a sealing member 24 formed in a ring shape is fitted and arranged on the inner peripheral portion on the upper side of the outer cylindrical member 16, and the outer peripheral end is vulcanized and bonded to the sealing member 24. A rubber diaphragm 30 is arranged on the upper side portion of the outer tube fitting 16. A liquid chamber 32 having an inner wall formed by these members is provided between the diaphragm 30 and the elastic body 14, and a liquid such as water or oil is sealed therein.

In the liquid chamber 32, a partition wall member 34 formed of, for example, a bottomed cylinder made of a synthetic resin material is provided.
The elastic member 14 is fitted on the inner wall surface of the seal rubber 14A, and the lower end portion is engaged with the projection 28 protruding from the fitting portion 16A so as to be positioned while being positioned along the axial direction of the outer cylinder fitting 16. The liquid chamber 32 is divided into a pair of small liquid chambers, ie, a pressure receiving liquid chamber 32A and an equilibrium chamber 32B.

Further, at both end portions of the partition member 34, distal end side flange portions 34 formed so as to expand outward.
A and a proximal flange portion 34B are provided, and a groove portion 34C formed in a groove shape over substantially the entire circumference along the outer periphery of the partition member 34 is provided on the outer periphery of the partition member 34. I have. At one end of the groove 34C,
A communication port 42 for communicating between the pressure receiving liquid chamber 32A and the inside of the groove 34C.
Is formed at the other end, and a communication port 44 that connects the equilibrium chamber 32B and the inside of the groove 34C is formed.

Therefore, by disposing the partition member 34 in the seal rubber 14A so as to be sealed over the entire outer periphery of both ends of the partition member 34, the groove 34C closed by the inner wall surface of the seal rubber 14A is formed. , Seal rubber 14A
A passage 36 is formed between the pressure receiving liquid chamber 32A and the equilibrium chamber 32B. The passage 36 is formed between the pressure receiving liquid chamber 32A and the equilibrium chamber 32B.

A circular recess 38 is formed at the center of the partition member 34. A through hole 40 through which the liquid can flow through the partition member 34 is formed in the recess 38.
Is provided. A disk-shaped holding member 26 is disposed below the partition member 34. The holding member 26 is made of rubber so as to close a hole 26A formed at the center of the holding member 26. The outer peripheral portion of the membrane 48 as the elastic plate is vulcanized and bonded.

Next, a procedure for manufacturing the vibration isolator 10 according to the present embodiment will be described. First, the inner fitting 12 and the outer fitting 16 are manufactured. When the outer fitting 16 is manufactured, a fitting portion 16A shown in FIG. 3 to FIG. A projecting portion 28 is provided along the axial direction of the outer tube fitting 16 so as to protrude from the fitting portion 16A. Thereafter, the inner metal fitting 12 and the outer cylindrical metal fitting 16 are put into a mold, and an elastic body 14 that connects them elastically deformable is formed by vulcanization.
The inner peripheral surface of the fitting portion 16A of the outer metal fitting 16 is covered with the seal rubber 14A extending from the outer peripheral surface. However, the portion of the projection 28 along the axial direction of the outer tube fitting 16 is the seal rubber 14A.
Avoid being covered by.

On the other hand, a partition member 34 is manufactured separately. At this time, a distal flange portion 34A and a proximal flange portion 34B are formed at both ends of the partition member 34 so as to extend outward. . The outer diameter of these flanges is slightly larger than the inner diameter of the seal rubber 14A, so that an appropriate seal margin can be obtained.

Next, in the liquid, together with the membrane 48, the partition wall member 34 is pressed into the fitting portion 16A of the outer tube fitting 16 from the distal flange portion 34A, so that the partition member 34 is removed by the projection 28 as shown in FIG. The cylindrical member 16 is locked, and the projection 28 positions the outer cylindrical member 16 in the axial direction, and the space between the outer cylindrical member 16 and the partition member 34 is sealed via the seal rubber 14A. You. Further, by press-fitting the sealing fitting 24 into the fitting portion 16 </ b> A, the diaphragm 30 is stored in the outer tubular fitting 16.

As described above, not only are these members housed in the outer tube fitting 16, but also the space between the pair of liquid chambers 32A and 32B is sealed by the partition member 34, and the equilibrium chamber 32
B is sealed by a diaphragm 30 at the upper part of FIG.
The state is as shown in the figure. Thereafter, the vibration isolator 10 completed in this way is installed in the vehicle, and the outer cylinder fitting 16 is connected to the vehicle body, so that the vibration isolator 10 can be mounted on the vehicle body. Further, a bolt (not shown) is fastened to the screw hole 12B of the inner metal fitting 12, and the inner metal fitting 12 is connected to the engine, thereby completing the installation of the vibration isolator 10.

Next, the operation of the vibration isolator 10 and the method of manufacturing the vibration isolator according to the present embodiment will be described. A cylindrical outer bracket 16 is connected to the vehicle body.
The inner metal fitting 12 is positioned on the inner peripheral side of the inner metal part, and the other end of the inner metal fitting 12 is connected to the engine. Further, an elastic body 14 disposed between the inner metal fitting 12 and the outer cylindrical metal fitting 16 is provided.
Connect the inner metal fitting 12 and the outer cylindrical metal fitting 16 so as to be elastically deformable.

Accordingly, when the engine mounted on the inner fitting 12 operates, the vibration of the engine is transmitted to the elastic body 14 via the inner fitting 12. This elastic body 14 acts as a vibration absorbing main body, and can absorb vibration by a vibration damping function based on internal friction of the elastic body 14. Further, the liquid in the pressure receiving liquid chamber 32A and the liquid in the equilibrium chamber 32B mutually flow through the orifice 46, and the damping action based on the pressure change of the liquid generated in the orifice space, the viscous resistance of the liquid flow, etc. improves the vibration isolation effect. be able to.

On the other hand, an inner peripheral surface of a fitting portion 16A provided to the outer cylindrical metal member 16 with an enlarged diameter is covered with a seal rubber 14A extending from an elastic body. Also, the sealing rubber 14
A along the axial direction of the outer tube fitting 16 without being covered by the
Three to ten protrusions 28 protruding toward the A side are provided along the circumferential direction of the outer tube fitting 16, and these protrusions 28
By positioning the partition member 34 along the axial direction of the outer cylinder 16, the partition member 34 is fitted and fixed to the outer cylinder 16 via the seal rubber 14 </ b> A.

Accordingly, the anti-vibration device 10 according to the present embodiment
Although the protrusion 28 not covered with the seal rubber 14A is provided so as to protrude toward the fitting portion 16A, the rubber material extends from the elastic body through a portion other than the protrusion 28A, and the seal rubber 14A is connected to the fitting portion 16A. Can be arranged on the inner peripheral surface of the. Further, since the projection 28 of the outer tube fitting 16 on which the partition member 34 is placed is not covered with the seal rubber 14A, the partition member 34 can be easily positioned, and the assemblability of the vibration isolator 10 is improved and The change causes the seal rubber 14 </ b> A to be loosened, so that the partition wall member 34 and the outer tube fitting 16 are removed.
There is no possibility that a gap is formed between the first and second seals, and the reliability of the seal is improved.

On the other hand, in the present embodiment, as shown in FIGS. 3 to 5, 3 to 10 projections 28 are provided along the circumferential direction of the outer tube fitting 16, and these projections 28 The tip is located so as to protrude from the fitting portion 16A to the inner peripheral side of the outer cylinder fitting 16. Therefore, since the width of the surface of the projection 28 on which the partition member 34 is positioned is wider than the width of the fitting portion 16A, the partition member 34 can be positioned and fixed more stably. Furthermore, since the number of the protrusions 28 is at least three or more, the partition member 34 can be fixed at the surface connecting the three or more points, so that the partition member 3 can be more stably formed.
4 can be fixed while being positioned. Further, since the protrusions 28 play the role of reinforcing ribs of the outer tube fitting 16, increasing the number of the protrusions 28 allows the outer tube fitting 1 to be increased.
6 can be increased in strength.

On the other hand, in this embodiment, flange portions 34A and 34B are provided at both ends of the partition member 34, and the passage 36 is provided between the seal rubber 14A and the partition member 34.
Is formed, so that the liquid can flow between the liquid chambers 32A and 32B defined by the partition member 34 by the passage 36.

On the other hand, in the present embodiment, as in the case where high-frequency vibration is transmitted, the orifice 46 capable of only reducing the narrow frequency range is clogged and the orifice 46
Even when the vibration is not sufficiently reduced depending on the case alone, the membrane 48 does not elastically deform and the internal pressure in the liquid chamber 32 does not increase. As a result, even if a high frequency vibration that cannot be reduced by the orifice 46 is generated, the orifice 46 becomes a low dynamic spring, the vibration isolating characteristics are maintained without being reduced, and the effect of the vibration isolating device 10 is sufficiently exhibited.

In the above embodiment, the number of the protrusions 28 is set to 3 to 10, but it is more preferable to set the number to 4 to 6. Further, in the above-described embodiment, the inner fitting 12 is connected to the engine as the vibration generating unit, and the outer cylinder 16 is connected to the vehicle body as the vibration receiving unit. Is also good. On the other hand, in the embodiments, the purpose is to dampen an engine mounted on a vehicle. However, it can be said that the damping device of the present invention is used for, for example, a body mount of a vehicle, or other uses other than the vehicle. Needless to say, the shape and size of the elastic body and the number of orifices are not limited to those of the embodiment.

[0039]

As described above, the anti-vibration device and the method of manufacturing the anti-vibration device according to the present invention have the above-described configuration, and therefore, it is possible to improve the assemblability while securing the sealing performance and to reduce the manufacturing cost. Has the effect.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of a vibration isolator according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a perspective view of an outer cylinder fitting applied to an embodiment of the vibration isolator according to the present invention.

FIG. 4 is a plan view of an outer cylinder fitting applied to an embodiment of the vibration isolator according to the present invention.

5A and 5B are cross-sectional views of the outer cylinder fitting of FIG. 4, wherein FIG. 5A is a view taken along line 5A-5A of FIG. 4 and FIG.
It is a 5B arrow line view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vibration isolator 12 Inner fitting 14 Elastic body 14A Seal rubber 16 Outer cylinder fitting 16A Fitting part 28 Projection part 32 Liquid chamber 32A Pressure receiving liquid chamber 32B Equilibrium chamber 34 Partition member 34A Front flange 34B Base flange

Claims (8)

[Claims] A first support member connected to one of the vibration generating section and the vibration receiving section; a second support member connected to the other of the vibration generating section and the vibration receiving section; An elastic body arranged so as to elastically deform these support members, a liquid chamber in which the elastic body is a part of a wall surface and in which a liquid is sealed, an elastic body provided to the second support member with an increased diameter; A fitting portion whose inner peripheral surface is covered by a seal rubber extending from the projection, a protrusion that is not covered with the seal rubber, and partially projects toward the fitting portion along the axial direction of the second support member; And a partition member that is positioned along the axial direction of the second support member, is fitted to the second support member via a seal rubber, and is fixed while partitioning the liquid chamber. And anti-vibration device. 2. The anti-vibration device according to claim 1, wherein the projecting portion projects from the fitting portion to the inner peripheral side of the second support member. 3. An anti-vibration device according to claim 1, wherein 3 to 10 projections are provided along the circumferential direction of the second support member. 4. A partition member having a distal flange portion and a proximal flange portion formed at both ends of the partition member so as to expand outward, respectively, wherein a passage is formed between the seal rubber and the partition member. The vibration isolator according to any one of claims 1 to 3, wherein a partition member is disposed in the seal rubber so as to be sealed over the entire periphery of both ends. 5. When a first support member and a second support member are produced, and when the first support member and the second support member are connected by an elastic body so as to be elastically deformable, a second support member is formed. The support member is provided with a fitting portion which is expanded in diameter, and the inner peripheral surface of the fitting portion is covered with a seal rubber extending from the elastic body, and the second support member is not covered with the seal rubber in the axial direction. A protrusion protruding toward the fitting portion is provided along the side, and a partition member capable of partitioning the liquid chamber is produced in accordance with the protrusion, and then the partition member is pressed into the second support member. In the vibration damping device, the gap between the partition member and the second support member is sealed via the seal rubber while positioning the second support member along the axial direction by the protrusion. Production method. 6. The anti-vibration device according to claim 5, wherein, when manufacturing the second support member, the protrusion projects from the fitting portion to the inner peripheral side of the second support member. Production method. 7. A method for manufacturing a second support member, comprising:
The method according to claim 5, wherein the zero protrusion is provided along a circumferential direction of the second support member. 8. The manufacturing method according to claim 5, wherein when forming the partition member, a distal flange portion and a proximal flange portion are formed at both ends of the partition member so as to extend outward. The method for manufacturing a vibration isolator according to any one of the above.