WO2012002402A1 - Vibration control device and method of manufacturing movable plate unit - Google Patents

Abstract

A vibration control device is provided with a second restricted flow passage which establishes communication between a pair of liquid chambers; and a movable plate unit which comprises a pair of rectangular plates and a movable plate, said pair of rectangular plates being such that the same are disposed away from, and opposite to, each other in the circumferential direction in such a way as to divide the second restricted flow passage, and that liquid communication holes are formed, and said movable plate being disposed in a movable space formed between the pair of rectangular plates, being movable between the pair of rectangular plates in a direction along the second restricted flow passage, and being capable of closing the communication holes.

Description

Anti-vibration device and manufacturing method of movable plate unit

The present invention relates to a vibration isolator that is used for engine mounts and suspensions of vehicles and the like and absorbs and attenuates vibration from a vibration generating unit, and a method of manufacturing a movable plate unit used in the vibration isolator.

In automobiles, a vibration isolator is installed between the vibration source of the engine, suspension, brake, etc. and the vehicle body to suppress the transmission of vibrations to the vehicle body, or to reduce the natural vibration of the subframe, etc. It is supposed to be. As this type of vibration isolator, there is a liquid seal type bush type vibration isolator.

In general, a liquid-sealed bush type vibration isolator includes an outer cylinder, an inner cylinder, and an elastic body that connects the outer cylinder and the inner cylinder, and is communicated between the outer cylinder and the inner cylinder. A pair of liquid chambers is configured. The liquid-sealed bush type vibration isolator having such a configuration is installed so that the input direction of the main vibration is the radial direction, the elastic body is elastically deformed by the input of the vibration, and between the pair of liquid chambers In this way, the fluid flows and the anti-vibration effect is exhibited.

In the above-described liquid-sealed bush-type vibration isolator, the restricted flow path that connects the pair of liquid chambers is tuned in advance so as to be able to handle vibrations in a predetermined frequency band. If the frequency of the input vibration is greater than the tuned frequency band, clogging occurs in the restricted flow path, and the vibration isolation effect due to liquid flow cannot be obtained. May be provided. For example, in the vibration isolator described in Japanese Patent Laid-Open No. 2008-196569, a movable member is disposed between a pair of liquid chambers to cope with high-frequency vibrations, and the movable member is slightly displaced due to pressure fluctuation between the liquid chambers. As a result, the vibration isolator is prevented from having a high dynamic spring, and a vibration isolating effect is obtained.

However, in the vibration isolator described in Japanese Patent Application Laid-Open No. 2008-196569, both ends in the axial direction of the movable member are held between rubber elastic bodies, and the movable member is displaced by elastic deformation of the rubber elastic body. When the movable member is held by the rubber elastic body in this way, the vibration characteristics of the movable member depend on the elasticity and shape of the rubber elastic body, and tuning is difficult. Further, in the vibration isolator described in Japanese Patent Application Laid-Open No. 2008-196669, the pair of liquid chambers is partitioned only by the movable member, and the movable member is movable between the radially outer side of the movable member and the inner wall of the outer cylindrical metal fitting. Since the member is vibrated, a gap is formed and it is difficult to seal.

The present invention has been made in consideration of the above facts, and a vibration isolator capable of obtaining a vibration isolating effect at the time of high frequency vibration input with a simple configuration, and a movable plate unit used in the vibration isolator. An object is to provide a manufacturing method.

The vibration isolator according to the first aspect of the present invention includes a cylindrical outer tube connected to one of the vibration generating unit and the vibration receiving unit, and the other of the vibration generating unit and the vibration receiving unit, An inner cylinder disposed along the cylinder axis direction of the outer cylinder so as to penetrate the cylinder, and the inner cylinder and the outer cylinder are elastically disposed between the inner cylinder and the outer cylinder. A pair of liquid chambers, in which at least part of the inner wall is configured by the elastic body, and is configured to be spaced apart in the circumferential direction between the inner cylinder and the outer cylinder, and in which liquid is sealed; A first restriction channel that communicates between the pair of liquid chambers, and a circumferential direction inside the outer cylinder, set to correspond to a higher frequency than the first restriction channel, and the pair A second restriction channel that communicates between the liquid chambers and a second restriction channel that is separated from each other in the circumferential direction so as to divide the second restriction channel. A pair of width plate portions in which liquid communication holes are formed, and a movable space formed between the pair of width plate portions, along the second restriction flow path between the pair of width plate portions. And a movable plate unit having a movable plate that can move in the above direction and close the communication hole.

In the first aspect of the vibration isolator, the elastic body connects the outer cylinder and the inner cylinder, the inner cylinder or the outer cylinder is connected to the vibration generating section, and the vibration is generated from the vibration generating section side. When transmitted to the cylinder, the elastic body is deformed, and the vibration is attenuated by this deformation, and the vibration is hardly transmitted to the vibration receiving portion connected to the outer cylinder or the inner cylinder.

Furthermore, when vibration is input at a relatively low frequency, pressure fluctuation occurs between the pair of liquid chambers as the elastic body is deformed, and the liquid flows in the first restricted flow path. At this time, due to liquid column resonance or the like, a vibration isolation effect is exhibited, and vibration is hardly transmitted to the vibration receiving portion side. At this time, the movable plate of the movable plate unit provided in the second restriction channel is pressed against one of the pair of width plates, thereby closing the communication hole of the width plate, and the second restriction channel. The flow of the fluid between the pair of liquid chambers through is blocked.

When the vibration higher than the corresponding vibration frequency of the first restriction channel is input, the first restriction channel is clogged. The movable plate of the movable plate unit provided in the second restriction channel vibrates in a movable space formed between the pair of width plate portions. As a result, an increase in the dynamic spring constant of the vibration isolator is suppressed, and a vibration isolating effect can be obtained.

In the present invention, the second restriction channel can be opened and closed by the movable plate. Further, the movable plate vibrates between the pair of width plate portions that divide the second restriction channel, thereby suppressing an increase in the dynamic spring constant of the vibration isolator. Therefore, tuning for easily obtaining desired characteristics can be performed by adjusting the distance between the pair of movable plates or changing the thickness and elastic modulus of the movable plate.

In addition, the vibrating movable plate itself does not divide between the second restricted flow paths, but a pair of non-vibrating width plate parts divide the second restricted flow path. Sealing for closing the second restriction channel can be performed easily and reliably. Moreover, since the 2nd restriction | limiting channel | path is connected by the communicating hole comprised by a pair of width-plate part, a communicating hole can be easily closed with a movable board at the time of the low frequency vibration input.

In the vibration isolator according to the second aspect of the present invention, the movable plate unit is formed in a box shape having the pair of width plate portions as one of the opposing surfaces, and the movable space is configured in the box. The movable plate is housed.

Thus, by making the movable plate unit into a box shape and storing the movable plate in the box, the movable plate unit can be made into one part, and can be easily assembled.

The vibration isolator according to the third aspect of the present invention is disposed between the outer cylinder and the inner cylinder, the elastic body is fixed, and is disposed along the inner periphery of the second restricted flow path. An intermediate cylinder having a second inner peripheral portion, and a sandwiching portion configured to sandwich the movable plate unit with the outer cylinder is formed on the outer surface side of the second inner peripheral portion of the intermediate cylinder. It is characterized by.

By configuring the second restriction channel on the outer peripheral side of the intermediate cylinder and clamping the movable plate unit between the clamping portion of the intermediate cylinder and the outer cylinder, the movable plate unit can be easily fixed.
In the vibration isolator according to the fourth aspect of the present invention, the movable plate unit is configured to have an opening communicating with the movable space and capable of inserting the movable plate in a direction along the cylinder axis of the inner cylinder. It is characterized by that.

As described above, by configuring the movable plate unit with an opening through which the movable plate can be inserted into the movable space, the movable plate can be stored in the movable space after the movable plate unit is assembled. In addition, since the opening is configured to allow the movable plate to be inserted in the direction along the cylinder axis of the inner cylinder, the movable plate is prevented from coming out radially outward after the insertion and before the outer cylinder is extrapolated. can do.

The vibration isolator according to the fifth aspect of the present invention includes the first restricted flow channel, the second restricted flow channel, the width plate portion, and the movable space, and is radially outside the liquid chamber. And a restriction channel member disposed along the circumferential direction inside the outer cylinder.
As described above, by configuring the restricted flow path member with the first restricted flow path, the second restricted flow path, the width plate portion, and the movable space, it is possible to reduce the number of parts of the vibration isolator and to perform the assembly work. Can be made easier.

The vibration isolator according to the sixth aspect of the present invention is characterized in that the restricted flow path member is composed of two members divided at a portion constituting the movable space.
Thus, by making the restricted flow path member into two members that are divided into two parts constituting the movable space, the movable plate can be easily accommodated in the movable plate accommodating portion.

In the vibration isolator according to the seventh aspect of the present invention, a protrusion to be inserted into the communication hole is formed at a position corresponding to the communication hole on at least one surface of the movable plate. It is characterized by.
Thus, the movable plate can be easily assembled between the pair of width plate portions by forming the protrusion at a position corresponding to the communication hole and inserting the protrusion into the communication hole.

The vibration isolator according to the eighth aspect of the present invention is characterized in that the protrusion has a length capable of penetrating the communication hole.
In this way, by allowing the protrusion of the movable plate to pass through the communication hole, it can be easily confirmed from the outside whether the movable plate is incorporated in the movable plate unit, and it is possible to easily determine whether the movable plate is forgotten to be assembled. it can.

In the vibration isolator according to the ninth aspect of the present invention, the communication hole is dimensioned so that the protrusion is not in contact with the hole edge of the communication hole when the movable plate is displaced maximum in the movable space. It is characterized by being set.
Thus, by setting the dimension of the communication hole, the protrusion of the movable plate does not come into contact with the hole edge of the communication hole, so that friction does not occur between the movable plate and the hole edge. The movable plate can be vibrated freely.

In the vibration isolator according to the tenth aspect of the present invention, the first restricted flow path is configured on the opposite side of the second restricted flow path across the inner cylinder when viewed from the cylinder axis direction. It is characterized by this.
In this way, by configuring the first restricted flow path and the second restricted flow path on the opposite side across the inner cylinder, each restricted flow path does not interfere with each other, and the restricted flow path is designed. The degree of freedom can be increased.

A method of manufacturing a movable plate unit according to an eleventh aspect of the present invention includes a pair of width plate portions that are arranged opposite to each other in the liquid flow direction to form a movable space and a liquid communication hole, and A connecting member that connects the pair of width plate portions while maintaining a separation distance, and the circulation member disposed in the movable space configured between the pair of width plate portions. A movable plate unit having a movable plate movable in a direction and capable of closing the communication hole, wherein the movable plate is formed on a part of the storage member facing the movable space. It arrange | positions, contacting material, performs the formation process of the said movable plate, Then, the said movable plate is moved to the said distribution direction within the said movable space.

The movable plate unit manufactured according to the present invention has a storage member in which a pair of width plate portions are arranged while being separated from each other by a connecting portion, and is movable in a movable space formed in a separated portion in the storage member. A plate is accommodated and the movable plate moves within the movable space.

In the method for manufacturing the movable plate unit of the present invention, the movable plate material is formed by placing the movable plate material that forms the movable plate in contact with a part of the housing member that faces the movable space. Here, as the movable plate material forming the movable plate, unvulcanized rubber or molten resin can be used. When unvulcanized rubber is used, the formation process includes a vulcanization process. In this way, by performing the forming process of the movable plate using the storage member while being in contact with the storage member, the operation of assembling the movable plate to the storage member becomes unnecessary, and the manufacturing can be simplified. Further, since the movable plate is in contact with a part of the storage member, the contact portion is usually in close contact after the forming process. Therefore, in the manufacturing process of the movable plate unit, it is possible to prevent the movable plate from dropping from the storage member.

After the forming process of the movable plate, the movable plate can be moved in the flow direction in the movable space to release the close contact with the storage member and can be moved in the movable space.

The method for manufacturing a movable plate unit according to a twelfth aspect of the present invention is characterized in that, in the forming process, the movable plate material is disposed in contact with an inner surface of one of the width plate portions.

In this way, the movable plate material is placed in contact with the inner side surface of the width plate portion to perform the forming process, so that the movable plate closely contacts the inner side surface of the width plate portion. The contact state between the movable plate and the width plate portion can be released by using the liquid pressure of the liquid to be performed.

In the movable plate unit manufacturing method according to the thirteenth aspect of the present invention, the storage member has a divided shape capable of opening and closing the movable space, and a part of the divided storage member is molded in the forming process. And the movable plate material is injected into the movable space in the mold.

As described above, by using a split-shaped storage member capable of opening and closing the movable space, the movable plate can be formed using a part of the split storage member.

As described above, according to the vibration isolator of the present invention, it is possible to obtain a vibration isolating effect when inputting high frequency vibration with a simple configuration.
In addition, a movable plate unit including a movable plate for obtaining a vibration isolation effect when high-frequency vibration is input can be easily manufactured.

It is a perspective view of the state where the outer cylinder of the vibration isolator which concerns on 1st Embodiment, and the outer cylinder were removed. It is the disassembled perspective view which removed the restricted channel member of the vibration isolator which concerns on 1st Embodiment. It is a side view of the side by which the 1st restriction | limiting channel | path of the vibration isolator which concerns on 1st Embodiment is comprised. It is sectional drawing which cut | disconnected the vibration isolator which concerns on 1st Embodiment perpendicularly | vertically with the cylinder axis direction. FIG. 5 is a VV cross-sectional view of FIG. 4. FIG. 6 is a sectional view taken along line VI-VI in FIG. 4. It is sectional drawing of the movable plate unit of the vibration isolator which concerns on 1st Embodiment. It is a modification of the movable plate unit of the vibration isolator which concerns on 1st Embodiment. It is another modification of the movable plate unit of the vibration isolator which concerns on this embodiment. FIG. 10 is an AA cross-sectional view of the movable plate unit shown in FIG. 9. FIG. 10 is a BB cross-sectional view of the movable plate unit shown in FIG. 9. It is a perspective view of the other modification of the movable plate unit of the vibration isolator which concerns on this embodiment. It is a perspective view of the other modification of the movable plate unit of the vibration isolator which concerns on this embodiment. It is a figure explaining the manufacturing method of the movable plate unit shown to FIG. 11A. It is a figure explaining the manufacturing method of the movable plate unit shown to FIG. 11A. It is a figure explaining the manufacturing method of the movable plate unit shown to FIG. 11A. It is a figure explaining the manufacturing method of the movable plate unit shown to FIG. 11A. It is a figure explaining the manufacturing method of the movable plate unit shown in FIG. It is the perspective view of the state which removed the outer cylinder and outer cylinder of the vibration isolator which concerns on 2nd Embodiment. It is the disassembled perspective view which removed the restricted channel member of the vibration isolator which concerns on 2nd Embodiment. It is a side view of the side by which the 1st restriction | limiting flow path of the vibration isolator which concerns on 2nd Embodiment is comprised. It is sectional drawing which cut | disconnected the vibration isolator which concerns on 2nd Embodiment perpendicularly to the cylinder axis direction. FIG. 20 is a VV sectional view of FIG. 19. It is VI-VI sectional drawing of FIG. It is sectional drawing of the movable plate unit of the vibration isolator which concerns on 2nd Embodiment. It is a perspective view of the modification of the restricted flow path member of the vibration isolator which concerns on 2nd Embodiment. It is sectional drawing which cut | disconnected the vibration isolator which has the restriction | limiting flow path member of FIG. 23 perpendicularly | vertically with the cylinder axial direction.

[First Embodiment]
Hereinafter, the details of the first embodiment of the vibration isolator of the present invention will be described with reference to the drawings.

As shown in FIG. 1 to FIG. 6, the vibration isolator 10 of this embodiment includes an inner cylinder 12 and an outer cylinder 14. The outer cylinder 14 has a cylindrical shape, and a rubber film 14A is vulcanized and bonded to the inner peripheral wall surface. The inner cylinder 12 has an axial cylindrical shape having a smaller diameter than the outer cylinder 14, and is arranged coaxially with the outer cylinder 14 in the cylinder of the outer cylinder 14. Hereinafter, a direction along the axial center of the inner cylinder 12 and the outer cylinder 14 is referred to as an “axial direction S”. One of the inner cylinder 12 and the outer cylinder 14 is connected to a suspension (not shown) side that is a vibration generating portion, and the other is connected to a vehicle body (not shown) side that is a vibration receiving portion. Moreover, in the vibration isolator 10 of this embodiment, it is installed so that the input direction of the main vibration may be the arrow F direction shown in FIG.

As shown in FIG. 5, an intermediate cylinder 16 is disposed between the inner cylinder 12 and the outer cylinder 14. The intermediate cylinder 16 has a pair of large-diameter end portions 16A at both ends in the axial direction S, and an intermediate portion 16B that connects the pair of large-diameter end portions 16A in the middle of the axial direction S. As shown in FIG. 4, the intermediate portion 16B has a smaller diameter than the large-diameter end portion 16A, and a pair of openings 16W are formed at positions facing each other across the cylinder shaft. The opening 16 </ b> W has a substantially rectangular shape, has a predetermined circumferential length in the circumferential direction (in the present embodiment, a length of ¼ or more of the total circumferential length), and extends in the axial direction S over the entire length of the intermediate portion 16 </ b> B. . By configuring the pair of openings 16W, the intermediate portion 16B is disposed on both sides facing each other with the inner cylinder 12 therebetween. Hereinafter, one side of the intermediate part 16B is referred to as a “high-frequency channel side intermediate part 16BH”, and the other side is referred to as a “low-frequency channel side intermediate part 16BL”. The high-frequency flow path side intermediate portion 16BH and the low-frequency flow path side intermediate portion 16BL are formed in an arc shape centered on the axis of the inner cylinder 12, and the intermediate portion in the circumferential direction of the high-frequency flow path side intermediate portion 16BH as the second inner peripheral portion A flat surface 16 </ b> C as a sandwiching portion is formed on the outer surface. A movable plate unit 30 to be described later is sandwiched between the outside of the flat surface 16C and the outer cylinder 14.

An elastic body 18 is disposed between the inner cylinder 12 and the intermediate cylinder 16, and the inner cylinder 12 and the intermediate cylinder 16 are elastically connected by the elastic body 18. The elastic body 18 is fixed to the outer periphery of the inner cylinder 12 and is fixed to the inside of the large-diameter end portion 16A and the intermediate portion 16B of the intermediate cylinder 16. The elastic body 18 can be made of an elastic member such as rubber. A portion of the outer periphery of the inner cylinder 12 facing the opening 16 </ b> W of the intermediate portion 16 </ b> B is covered with an outer membrane 18 </ b> B formed integrally with the elastic body 18.

A high-frequency communication portion 18H is formed integrally with the elastic body 18 on the outer peripheral side of the high-frequency flow path side intermediate portion 16BH. The high-frequency communication portion 18H is configured to be convex from both end sides in the axial direction S toward the center. A movable plate unit 30 to be described later is held by a holding portion 18HM configured at a circumferential intermediate portion of the high-frequency communication portion 18H, and a restriction channel member 22 to be described later is provided at both circumferential ends of the high-frequency communication portion 18H. Are fitted and engaged.

A low frequency communication portion 18L is formed integrally with the elastic body 18 on the outer peripheral side of the low frequency flow path side intermediate portion 16BL. As shown in FIGS. 3 and 5, a low-frequency groove 18 </ b> M extending in the circumferential direction and opened in the circumferential direction at the end is formed in the central portion in the axial direction S on the outer peripheral side of the low-frequency communication portion 18 </ b> L. ing. The low frequency groove 18M is closed on the outer side in the radial direction by the rubber film 14A of the outer cylinder 14, and constitutes a part of the first restriction channel 22C.

A pair of liquid chambers 20A and 20B are configured in a portion corresponding to the opening 16W on the outer side in the radial direction of the inner cylinder 12. The liquid chambers 20 </ b> A and 20 </ b> B are configured by being surrounded by an elastic body 18 and a pair of restricted flow path members 22 described later.

The pair of restrictive flow path members 22 is disposed between the inner cylinder 12 and the outer cylinder 14 at a position corresponding to the opening 16W. As shown in FIG. 2, the restriction channel member 22 has an arc shape curved in the circumferential direction along the inner surface of the outer cylinder 14. The outer peripheral surface of the restriction channel member 22 is an arcuate curved surface along the inner periphery of the outer cylinder 14, and is in close contact with the rubber film 14 </ b> A formed on the inner peripheral wall surface of the outer cylinder 14.

The stopper part 24 is comprised in the circumferential direction intermediate part of the inner peripheral side of the restriction | limiting flow path member 22. FIG. The stopper portion 24 protrudes radially inward to the vicinity of the inner cylinder 12, and the inner side in the radial direction is an arcuate curved surface along the outer periphery of the inner cylinder 12. The stopper portion 24 is disposed away from the outer surface of the inner cylinder 12. Concave portions 25 </ b> A are formed on both outer sides in the circumferential direction of the stopper portion 24, and concave portions 25 </ b> B are formed on both outer sides in the axial direction S of the stopper portion 24. The liquid chamber 20A is configured in a space corresponding to one of the recesses 25A and 25B in the pair of restricted flow path members 22, and the liquid chamber 20B is configured in a space corresponding to the other recesses 25A and 25B. The liquid chambers 20A and 20B are spaced apart from each other in the circumferential direction. Liquid L such as water or oil is sealed in the liquid chambers 20A and 20B.

A second restricted flow path portion 26 is formed at one end in the circumferential direction of the pair of restricted flow path members 22. The distal end side of the second restricting flow path portion 26 is disposed on the outer periphery of the high frequency flow path side intermediate portion 16BH, and is fitted into and engaged with the high frequency communication portion 18H. The distal ends of the second restriction flow path portions 26 of the pair of restriction flow path members 22 are spaced apart from each other, and a second liquid chamber 27 is configured in the separation portion. A second groove 26 </ b> M is formed along the circumferential direction in the center of the axial direction S on the outer periphery of the second restricted flow path portion 26. The second groove 26M is open in the circumferential direction on the tip side. The outer side of the second groove 26M in the radial direction is closed by the rubber film 14A of the outer cylinder 14, and a second restriction channel 26C is configured. A communication portion 26 </ b> A is configured in a portion corresponding to the concave portion 25 </ b> A (the concave portion 25 </ b> A on the second restricted flow passage portion 26 side) in the circumferential direction of the second restricted flow passage portion 26. The communication part 26A penetrates the restriction channel member 22 in the radial direction, and the second restriction channel 26C and the liquid chamber 20A (or the liquid chamber 20B) communicate with each other via the communication part 26A.

A first groove 22M is formed on the outer peripheral surface of the restricted flow path member 22. One end of the first groove 22M communicates with the low frequency groove 18M of the low frequency communication portion 18L. The first groove 22M extends in the circumferential direction on the outer peripheral surface of the restriction flow path member 22 and is also bent in the axial direction to ensure a predetermined path length. The other end of the first groove 22M has a communicating portion 22A at a portion corresponding to the recessed portion 25A (the recessed portion 25A on the low frequency communicating portion 18L side) in the circumferential direction. A radially outer side of the first groove 22M is closed by the rubber film 14A of the outer cylinder 14, and a part of the first restriction channel 22C is configured. The liquid chamber 20A (or the liquid chamber 20B) and the first restriction channel 22C are communicated with each other via the communication portion 22A.

The first restriction channel 22C includes a first groove 22M formed on the outer surface of the pair of restriction channel members 22, and a low frequency groove 18M formed on the outer surface of the low frequency communication portion 18L. It is composed of a single flow path configured such that the radially outer side is closed by 14 rubber films 14A. The liquid chamber 20A and the liquid chamber 20B are communicated with each other through the first restriction channel 22C. The first restricting channel 22C flows between the liquid chamber 20A and the liquid chamber 20B through the first restricting channel 22C, and is controlled by a liquid column resonance action or the like in the first restricting channel 22C. It is set so that a vibration effect can be obtained. The first restricted flow path 22C is tuned so that its path length and cross-sectional area are adapted to vibration input in a relatively low frequency band in the frequency range of 5 Hz to 20 Hz.

The second restriction channel 26C is second from the liquid chamber 20A via the communication part 26A and the second groove 26M formed in the second restriction channel part 26 on one side of the pair of restriction channel members 22. It reaches the liquid chamber 27 and communicates with the liquid chamber 20B via the second groove 26M and the communication portion 26A of the second restriction channel portion 26 on the other side. The second restriction flow channel 26 </ b> C is configured along the circumferential direction on the inner periphery of the outer cylinder 14. The second restriction channel 26C is tuned to be adapted to vibration input in a relatively high frequency band in a frequency range of 30 Hz to 60 Hz at a higher frequency than the first restriction channel 22C. The second restricted flow channel 26C is configured on the opposite side of the first restricted flow channel 22C with the inner cylinder 12 in between.

A movable plate unit 30 is disposed in the second liquid chamber 27. The movable plate unit 30 includes a movable plate 32 and a box member 34. As shown in FIG. 7, a movable space 34 </ b> R is formed inside the box member 34, and a pair of width plate portions 35 are opposed to each other with a distance D <b> 1 in the circumferential direction across the movable space 34 </ b> R. . The pair of width plate portions 35 are disposed so as to divide the liquid chamber 20 </ b> A side and the liquid chamber 20 </ b> B side of the second liquid chamber 27. In addition, a plurality of communication holes 35 </ b> H are formed in the pair of width plate portions 35. The second liquid chamber 27 and the movable space 34R communicate with each other through the communication hole 35H.

As shown in FIG. 2, axially held portions 36 are formed at both ends in the axial direction S of the box member 34. An inner seal portion 37 is formed inside the box member 34 in the radial direction, and an outer seal portion 38 is formed outside in the radial direction. The outer surface of the boundary angle portion between the inner seal portion 37 and the axially retained portion 36 is a chamfered R-shaped portion R. As shown in FIG. 7, the outer surface of the outer seal portion 38 has an arc shape curved in the circumferential direction along the rubber film 14 </ b> A of the outer cylinder 14.

On the other hand, a holding portion 18HM cut out on the outer side in the axial direction S is formed in the intermediate portion in the circumferential direction of the high-frequency communication portion 18H, and a portion corresponding to the outer side of the flat surface 16C of the intermediate tube 16 is covered with a rubber thin film. A broken flat portion 18HP is formed. The box member 34 is disposed between the outer cylinder 14 and the intermediate cylinder 16, and the axially held part 36 is held by the holding part 18HM. The inner seal portion 37 is pressed against the flat portion 18HP, and the outer seal portion 38 is pressed against the rubber film 14A on the inner peripheral wall surface of the outer cylinder 14 and is sandwiched between the outer cylinder 14 and the intermediate cylinder 16. Thereby, the liquid chamber 20A side and the liquid chamber 20B side of the second liquid chamber 27 are partitioned.

The box member 34 can be made of a hard member such as a resin material or a metal material. The box member 34 can be constituted by being divided into two parts in the circumferential direction and bonded together as in the present embodiment. Alternatively, as shown in FIG. 8, a square cylindrical member is integrally formed to open the cylinder. It can also be configured as a box member 40 whose side is closed by a lid member 33. In this case, it is preferable to configure the opening 40A so that the movable space 34R is in a direction along the axial direction S.

As shown in FIG. 2, the movable plate 32 has a rectangular plate shape and is accommodated in a movable space 34R (see FIG. 7). The movable plate 32 is made of a member that is softer than the box member 34, such as rubber, and has a thickness D2. The movable plate 32 is disposed in the movable space 34R so that the thickness direction is the circumferential direction, the thickness D2 is shorter than the distance D1 between the pair of width plate portions 35, and the movable plate 32 is a pair of movable plates 32. Are movable (vibrated) with an amplitude of a distance D1. Further, the movable plate 32 can be closed to the communication hole 35 </ b> H formed in the width plate portion 35 by being pressed against the width plate portion 35. The distance D1 between the pair of width plate portions 35 and the thickness D2 of the movable plate 32 are set in the vibration isolator 10 so that desired dynamic spring characteristics can be obtained.

Next, the operation of this embodiment will be described.
When the inner cylinder 12 of the vibration isolator 10 is connected to a vibration generating part such as an engine and the outer cylinder 14 is connected to a vibration receiving part such as a vehicle body, vibrations from the vibration generating part are the inner cylinder 12, the elastic body 18, and the outer cylinder. 14 to the vibration receiver.

When a vibration with a relatively low frequency and a large amplitude (frequency 5 Hz to 20 Hz, amplitude ± 0.5 mm) is input, the elastic body 18 is elastically deformed to expand and contract the liquid chambers 20A and 20B, and the liquid L is the first restricted flow. An anti-vibration effect can be obtained by going back and forth between the liquid chamber 20A and the liquid chamber 20B via the path 22C and by a liquid column resonance action inside the first restricting flow path 22C. At this time, in the second restriction channel 26C, the movable plate 32 is pressed against the width plate portion 35 so that the communication hole 35H formed in the width plate portion 35 is closed and the liquid L is not circulated. It becomes.

On the other hand, when a relatively high frequency and small amplitude vibration (frequency 30 Hz to 60 Hz, amplitude ± 0.1 mm or less) is input, the first restricting flow path 22C is clogged. On the other hand, in the second restricting flow path 26C, the movable plate 32 vibrates between the width plate portions 35, and moves back and forth in the second restricting flow path 26C through the communication hole 35H, and the liquid pressure in the liquid chamber 20A and the liquid chamber 20B. Since the increase in the dynamic spring constant associated with the increase can be suppressed, vibrations in a high frequency range can also be effectively absorbed.

According to the vibration isolator 10 of the present embodiment, the second restricted flow path 26C is closed when vibration is input in a low frequency band (frequency 5 Hz to 20 Hz) and vibration is input in a high frequency band (frequency 30 Hz to 60 Hz). The opening of the second restriction channel 26C can be easily switched by opening and closing the communication hole 35H by the movable plate 32.

Further, since the second restricting channel 26C is partitioned by a pair of width plate portions 35 different from the movable plate 32, the second restricting channel 26C can be easily and surely closed on the outer peripheral surface of the width plate portion 35. Can be sealed.

In the present embodiment, the box member 34 of the movable plate unit 30 is made of a material harder than the movable plate 32, so that deformation of the box member 34 is suppressed, and the distance between the pair of width plate portions 35. By changing D1 and the thickness D2 of the movable plate 32, the movable plate unit 30 can be easily tuned.

Further, in the present embodiment, the portion of the intermediate portion 16B of the intermediate cylinder 16 where the movable plate unit 30 is disposed has a flat shape (flat surface 16C). It can be stably held between the flat outer portion (flat portion 18HP). In addition, you may make it insert the movable plate unit 30 in a recessed part by making the part by which the movable plate unit 30 of the intermediate part 16B is arrange | positioned into a concave shape.

Furthermore, since both corners of the axial direction S on the radially inner side of the movable plate unit 30 are chamfered, it can be easily attached when the movable plate unit 30 is attached to the holding portion 18HM.

In the present embodiment, the pair of width plate portions 35 are configured by the opposing surfaces of the box member 34. However, the pair of width plate portions 35 may be separately installed and the movable plate 32 may be disposed therebetween. . As in the present embodiment, the movable plate 32 is housed in the box member 34 and the movable plate unit 30 is configured to be a single member and can be easily assembled.

Further, as shown in FIG. 9, a protrusion 32T may be provided on the movable plate 32 of the present embodiment. The protrusion 32T is formed at a position corresponding to the communication hole 35H, and is inserted into the communication hole 35H. By forming such a protrusion 32T, the movable plate can be easily assembled between the pair of width plate portions 35. That is, by inserting the protrusion 32T into one communication hole 35H of the two-divided box member 34, the movable plate 32 can be held in the one box member 34, and the two-divided box The movable plate 32 can be easily assembled to the member 3.

Further, the protrusion 32T does not necessarily have to pass through the communication hole 35H, but it is preferable that the protrusion 32T has a length that can pass through the communication hole 35H. By allowing the protrusion 32T of the movable plate 32 to pass through the communication hole 35H, it can be easily confirmed from the outside whether or not the 30 movable plate 32 is incorporated in the movable plate unit, and it is easily determined that the movable plate 32 has been forgotten to be incorporated. be able to.

Moreover, it is preferable that the communication hole 35H is set to a dimension in which the protrusion 32T is not in contact with the edge of the communication hole 35H when the movable plate is displaced in the movable space. For example, if the movable range in the cylinder axis S direction of the movable plate 32 is A as shown in FIG. 10A and the movable range in the radial direction is B as shown in FIG. It is preferable that 32T is set to a dimension that does not contact the edge of the communication hole 35H. Thus, by setting the dimension of the communication hole, the protrusion 32T of the movable plate 32 does not contact the hole edge of the communication hole 35H, so that friction does not occur between the movable plate 32 and the hole edge. The movable plate can be freely vibrated in the movable space.
Note that the protrusion 32T may be provided not only on one surface of the movable plate 32 but also on both surfaces.

In the present embodiment, the box member 34 of the movable plate unit 30 has been described with respect to an example in which the box member 34 is configured by two separate members before assembly. However, as shown in FIGS. A box member 45 configured by bending two members connected at 39 can also be used. In this case, if one side through the connecting portion 39 is the first storage portion 47 and the other side is the second storage portion 48, as shown in FIG. 11B, the first storage portion 47 has a rectangular plate shape, A first recess 47A is formed. A first width plate portion 47B is formed at the bottom of the first recess 47A. The first width plate portion 47B includes a plurality of communication holes 35H that are through holes. The outer periphery of the first recess 47A that is not configured has a frame shape, and the first frame portion 47C is configured. The second storage portion 48 is also formed in a rectangular plate shape, and a second recess 48A is formed at the center. A second width plate portion 48B is formed at the bottom of the second recess 48A. The second width plate portion 48B has a plurality of communication holes 35H that are through holes. The outer periphery of the second recess 48A that is not configured has a frame shape, and a second frame 48C is configured. The first storage part 47 and the second storage part 48 are connected to each other at one end sides along the short direction to form a connection part 39.

The first storage portion 47 and the second storage portion 48 are in contact with the first frame portion 47C and the second frame portion 48C so that the first recess portion 47A and the second recess portion 48A are on the inside. The engagement concave portion 47D and the engagement convex portion 48D of the second storage portion 48 are engaged with each other. The first concave portion 47A and the second concave portion 48A constitute a movable space 34R. The first storage portion 47 and the second storage portion 48 are rotatable relative to each other about the connecting portion 39, and the movable space 34R can be opened and closed. The box member 45 can be composed of a hard member such as a resin material or a metal material. The movable plate 32 is accommodated in the movable space 34 </ b> R in the box member 45, and the movable plate unit 41 is formed.

Next, a method for manufacturing the movable plate unit 41 shown in FIG. 11A will be described. Here, the case where the movable plate 32 is formed of a rubber material will be described.

First, a box member 45 is prepared, and the box member 45 is opened and the movable space 34R is opened as shown in FIG. And as shown in FIG. 13, the 1st accommodating part 47 is inserted | pinched with the metal mold | die 46. As shown in FIG. The mold 46 is divided into an upper mold 46A and a lower mold 46B. The upper mold 46A includes a recess 46A-1 for storing the first storage portion 47 and an inner wall constituting the first recess 47A. A protruding frame 46A-2 is formed. Also, a raw rubber injection port 46A-3 is formed. The lower mold 46B is formed with a protrusion 46B-1 to be inserted into the communication hole 35H at a position corresponding to the communication hole 35H.

In a state where the first storage portion 47 is sandwiched between the molds 46, raw rubber is injected from the injection port 46A-3 to vulcanize the raw rubber 32A. The vulcanization process here is performed so that the box member 45 and the raw rubber 32A are not bonded. Here, the non-adhesion includes weak adhesion such as anchor effect excluding vulcanization adhesion and chemical adhesion by an adhesive. If the adhesion is weak due to the anchor effect, it can be easily peeled off by the pressing force of the liquid described later.

After the vulcanization process is completed, the mold 46 is opened. The raw rubber 32A that has undergone the vulcanization process becomes a movable plate 32 and is in close contact with the first width plate portion 47B. Thereafter, the first storage portion 47 and the second storage portion 48 are combined, and the engaging convex portion 48D and the engaging concave portion 47D are engaged to close the movable space 34R. In this state, the box member 45 is fitted into the holding portion 18HM (see FIG. 1). And the outer cylinder 14 is inserted outside, the vibration isolator 10 is assembled, and the liquid L is distribute | circulated through the 2nd restriction | limiting flow path 26C. Due to the pressure from the liquid L, the movable plate 32 (see FIG. 14A) that is in close contact with the first width plate portion 47B moves away from the first width plate portion 47B and moves within the movable space 34R as shown in FIG. 14B. It becomes possible to vibrate.

According to the above manufacturing method of the movable plate unit 41, the movable plate 32 is formed in the movable space 34R of the box member 45. Therefore, there is no need to separately manufacture and incorporate the movable plate 32, and the movable plate unit 41 can be efficiently used. Can be manufactured. In addition, since the movable plate 32 formed in the movable space 34R is in close contact with the first width plate portion 47B, when the mold 46 is opened and the box member 45 is closed, the movable plate 32 is moved to the outside. Is prevented from falling off, and the assembly work can be facilitated.

In this embodiment, the raw rubber 32A is vulcanized in contact with the first width plate portion 47B. However, the raw rubber 32A is brought into contact with the inner wall of the first frame portion 47C and vulcanized. Also good. Also in this case, it is possible to suppress the falling of the movable plate 32 after vulcanization to the outside.

In the present embodiment, the contact state between the movable plate 32 and the first width plate portion 47B is released using the liquid pressure of the liquid L. However, other methods, for example, inserting a jig from the communication hole 35H, The movable plate 32 may be pressed to release the contact state between the movable plate 32 and the first width plate portion 47B.

In addition, even when two separate members that are not connected to each other, such as the movable plate unit 30, are used as the box member 34, the vulcanization process may be performed using the portion having the one width plate portion 35 as described above. it can. Furthermore, as shown in FIG. 15, a rectangular tubular member can be integrally formed, and a box member 40 having one end side of the cylinder as an opening 40A can be configured. When the box member 40 having this shape is used, the movable plate 32 is manufactured by inserting the raw rubber 32A and the middle mold 46-M into the movable space 34R from the opening 40A and performing vulcanization. Thereafter, only the middle mold 46-M is removed from the movable space 34R, and the vibration isolator 10 is assembled in the same manner as when the box member 45 is used. Then, the liquid L is caused to flow from the communication hole 35H, and the movable plate 32 is moved to the box member 40. It is separated from the inner wall of the inner space and can vibrate within the movable space 34R.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
As shown in FIGS. 16 to 21, the vibration isolator 50 according to this embodiment includes an inner cylinder 12 and an outer cylinder 14. One of the inner cylinder 12 and the outer cylinder 14 is connected to an engine (not shown) side that is a vibration generating portion, and the other is connected to a vehicle body (not shown) side that is a vibration receiving portion.

As shown in FIG. 20, an intermediate cylinder 16 is disposed between the inner cylinder 12 and the outer cylinder 14. An elastic body 18 is disposed between the inner cylinder 12 and the intermediate cylinder 16, and the inner cylinder 12 and the intermediate cylinder 16 are elastically connected by the elastic body 18.
As shown in FIG. 19, a pair of liquid chambers 20 </ b> A and 20 </ b> B is configured in a portion corresponding to the opening 16 </ b> W on the radially outer side of the inner cylinder 12. The liquid chambers 20A and 20B are configured by being surrounded by an elastic body 18 and a pair of restricted flow path members 52 described later.

The pair of restricted flow path members 52 are sandwiched and held inside the restricted flow path holding portion 18H in the axial direction. The restriction channel member 52 has an arc shape curved in the circumferential direction along the inner surface of the outer cylinder 14. The outer peripheral surface of the restricted flow path member 52 is an arcuate curved surface along the inner periphery of the outer cylinder 14, and is in close contact with the rubber film 14 </ b> A formed on the inner peripheral wall surface of the outer cylinder 14.

The stopper part 54 is comprised in the circumferential direction intermediate part of the inner periphery side of the restriction | limiting flow path member 52. As shown in FIG. The stopper portion 54 protrudes inward in the radial direction to the vicinity of the inner cylinder 12, and the inner side in the radial direction is an arc-shaped curved surface along the outer periphery of the inner cylinder 12. The stopper portion 54 is disposed away from the outer surface of the inner cylinder 12. Concave portions 55 </ b> A are formed on both outer sides in the circumferential direction of the stopper portion 54, and concave portions 55 </ b> B are formed on both outer sides in the axial direction S of the stopper portion 54. The liquid chamber 20A is configured in a space corresponding to one of the recesses 55A and 55B in the pair of restriction flow path members 52, and the liquid chamber 20B is configured in a space corresponding to the other recesses 55A and 55B. The liquid chambers 20A and 20B are spaced apart from each other in the circumferential direction. Liquid L such as water or oil is sealed in the liquid chambers 20A and 20B.

A second restricted flow path portion 56 is formed at one end of the pair of restricted flow path members 52 in the circumferential direction. The second restricted flow path portion 56 is disposed on the outer periphery of the high frequency flow path side intermediate portion 16BH, and the distal end portion of the second restricted flow path portion 56 has a width plate portion 65 and a storage component portion constituting the movable plate storage portion 60. 61 is integrally formed. The width plate portion 65 is arranged so as to partition the storage component portion 61 side of the second liquid chamber 57 described later. Each storage component 61 has a stepped portion so that one side and the other side are in a crank shape and engage with each other. The storage component parts 61 of the pair of restriction flow path members 52 are connected to each other and connected to each other, and the movable plate storage part 60 is configured. A movable space 64 </ b> R (see FIG. 22) is configured inside the movable plate storage unit 60. Details of the movable plate storage 60 will be described later.

A second groove 56M is formed on the outer periphery of the second restricted flow path portion 56 in the center in the axial direction S along the circumferential direction. Further, a concave second liquid chamber 57 is formed next to the storage component 61 of the second restricted flow path portion 56. The second groove 56M is opened to the second liquid chamber 57 on the tip side. The outer side of the second groove 56M in the radial direction is closed by the rubber film 14A of the outer cylinder 14, and a second restriction channel 56C is configured. A communication portion 56 </ b> A is configured in a portion corresponding to the concave portion 55 </ b> A (the concave portion 55 </ b> A on the second restricted flow channel portion 56 side) in the circumferential direction of the second restricted flow channel portion 56. The communication portion 56A passes through the restriction flow channel member 52 in the radial direction, and the second restriction flow channel 56C and the liquid chamber 20A (or the liquid chamber 20B) communicate with each other via the communication portion 56A.

A first groove 52M is formed on the outer peripheral surface of the restriction channel member 52. One end of the first groove 52M communicates with the low frequency groove 18M of the low frequency communication portion 18L. The first groove 52M extends in the circumferential direction on the outer peripheral surface of the restricted flow path member 52 and is also bent in the axial direction to ensure a predetermined path length. The other end of the first groove 52M has a communication portion 52A at a portion corresponding to the recess 55A (the recess 55A on the low frequency communication portion 18L side) in the circumferential direction. The radially outer side of the first groove 52M is closed by the rubber film 14A of the outer cylinder 14, and a part of the first restriction channel 52C is configured. The liquid chamber 20A (or the liquid chamber 20B) and the first restriction channel 52C are communicated with each other via the communication portion 52A.

The first restriction channel 52C includes a first groove 52M formed on the outer surface of the pair of restriction channel members 52 and a low frequency groove 18M formed on the outer surface of the low frequency communication portion 18L. It is composed of a single flow path configured such that the radially outer side is closed by 14 rubber films 14A. The liquid chamber 20A and the liquid chamber 20B are communicated with each other by the first restriction channel 52C. In the first restricting channel 52C, the liquid L circulates between the liquid chamber 20A and the liquid chamber 20B through the first restricting channel 52C, and is controlled by a liquid column resonance action or the like in the first restricting channel 52C. It is set so that a vibration effect can be obtained. The first restriction channel 52C is tuned so that its path length and cross-sectional area are adapted to vibration input in a relatively low frequency band in the frequency range of 5 Hz to 20 Hz.

The second restriction channel 56C is second from the liquid chamber 20A via the communication part 56A and the second groove 56M formed in the second restriction channel part 56 on one side of the pair of restriction channel members 52. The liquid chamber 57 reaches the second groove 56M and the communication portion 56A of the second restriction flow path portion 56 on the other side through the movable plate storage portion 60 (movable space 64R), and communicates with the liquid chamber 20B. The second restriction channel 56C is configured along the circumferential direction on the inner periphery of the outer cylinder 14. The second restricted flow path 56C is tuned to fit a vibration input in a relatively high frequency band in the frequency range of 30 Hz to 60 Hz at a higher frequency than the first restricted flow path 52C. The second restriction channel 56C is configured on the opposite side of the first restriction channel 52C with the inner cylinder 12 in between.

Between the pair of second liquid chambers 57, a movable plate storage unit 60 is configured. The movable plate storage portion 60 is configured in a box shape, with storage configuration portions 61 formed at the distal ends of the pair of second restriction flow channel portions 56 being abutted against each other and partitioned into width plate portions 65. That is, the pair of restricted flow path members 52 is divided into two by the movable plate housing portion 60. As shown in FIG. 22, a movable space 64R is configured inside the movable plate storage portion 60, and a pair of width plate portions 65 are opposed to each other with a distance D1 therebetween in the circumferential direction across the movable space 64R. ing. The pair of width plate portions 65 are arranged between the pair of second liquid chambers 67 so as to divide the second restriction channel 66C between the liquid chamber 20A side and the liquid chamber 20B side. In addition, a plurality of communication holes 65 </ b> H are formed in the pair of width plate portions 65. The second liquid chamber 67 and the movable space 64R communicate with each other through the communication hole 65H.

Note that the restrictive flow path member 52 can be formed of a hard member such as a resin material or a metal material. In particular, it can be manufactured inexpensively and easily by using a resin material. As in the present embodiment, the restriction channel member 52 can be divided into two parts in the circumferential direction at the position of the movable plate housing part 60, or can be divided into other parts. As in the present embodiment, the movable plate 32 can be easily accommodated by dividing into two in the circumferential direction at the position of the movable plate accommodating portion 60 (movable space 64R).

The movable plate 32 is stored in the movable space 64R. The movable plate 32 is disposed in the movable space 64R so that the thickness direction is the circumferential direction, the thickness D2 is shorter than the distance D1 between the pair of width plate portions 65, and the movable plate 32 includes a pair of movable plates 32. Are movable (vibrated) with an amplitude of a distance D1. The movable plate 32 can be closed to the communication hole 65 </ b> H formed in the width plate portion 65 by being pressed against the width plate portion 65. The distance D1 between the pair of width plate portions 65 and the thickness D2 of the movable plate 32 are set in the vibration isolator 50 so as to obtain desired dynamic spring characteristics.

Next, the operation of this embodiment will be described.
When the inner cylinder 12 of the vibration isolator 50 is connected to a vibration generating part such as an engine and the outer cylinder 14 is connected to a vibration receiving part such as a vehicle body, vibrations from the vibration generating part are the inner cylinder 12, the elastic body 18, and the outer cylinder. 14 to the vibration receiver.

When a vibration with a relatively low frequency and a large amplitude (frequency 5 Hz to 20 Hz, amplitude ± 0.5 mm) is input, the elastic body 18 is elastically deformed to expand and contract the liquid chambers 20A and 20B, and the liquid L is the first restricted flow. An anti-vibration effect can be obtained by going back and forth between the liquid chamber 20A and the liquid chamber 20B via the path 52C and by a liquid column resonance action inside the first restricting flow path 52C. At this time, in the second restricted flow path 56C, the movable plate 32 is pressed against the width plate portion 65, whereby the communication hole 65H formed in the width plate portion 65 is closed and the liquid L is not circulated. It becomes.

On the other hand, when a relatively high frequency and small amplitude vibration (frequency 30 Hz to 60 Hz, amplitude ± 0.1 mm or less) is input, the first restricting flow path 52C is clogged. On the other hand, in the second restricting flow path 56C, the movable plate 32 vibrates between the width plate portions 65, and moves back and forth within the second restricting flow path 56C through the communication hole 65H, and the liquid pressure in the liquid chamber 20A and the liquid chamber 20B. Since the increase in the dynamic spring constant associated with the increase can be suppressed, vibrations in a high frequency range can also be effectively absorbed.

According to the vibration isolator 50 of the present embodiment, the second restriction channel 56C is closed when vibration is input in a low frequency band (frequency 5 Hz to 20 Hz) and vibration is input in a high frequency band (frequency 30 Hz to 60 Hz). The opening of the second restriction channel 56C can be easily switched by opening and closing the communication hole 65H by the movable plate 32.

In addition, since the second restricting channel 56C is partitioned by a pair of width plate portions 65 different from the movable plate 32, the second restricting channel 56C is closed easily and reliably on the outer peripheral surface of the width plate portion 65. Can be sealed.

In the present embodiment, since the movable plate storage portion 60 is made of a material harder than the movable plate 32, deformation of the movable plate storage portion 60 is suppressed and the distance D1 between the pair of width plate portions 65 is suppressed. Tuning can be easily performed by changing the thickness D2 of the movable plate 62.

Further, in this embodiment, since the movable plate storage portion 60 is integrally formed with the restriction flow path member 52, the number of parts can be reduced as compared with the case where the movable plate storage portion is a separate body. Can be assembled easily.

It should be noted that the movable plate 32 of the present embodiment may also have a configuration in which the protrusion 32T shown in FIG. 9 is provided and inserted into the communication hole 65H.

In the present embodiment, the restriction flow path member 52 is divided into two parts, but as shown in FIG. 23, the restriction flow path member 72 may be integrally configured. In this case, the separation portion 74 for sandwiching the low frequency communication portion 18L in a part of the circumferential direction is configured, and the separation distance between the two end portions 72E of the restriction channel member 72 constituting the separation portion 74 is The inner cylinder 12 is longer than the outer diameter. An opening 60 </ b> A is formed on the upper surface of the movable plate storage unit 60 along the cylinder axis direction S. When viewed from the axial direction S of the restricting flow path member 72, each of the portions corresponding to the inner cylinder 12 from both of the front end portions 72E is linear and arranged in parallel to each other.

In this way, by integrally configuring the restriction channel member 72, the number of parts can be reduced and the assembly can be easily performed.
In this case, the movable plate 32 is housed in the movable space 64R from the opening 60A. After the restriction channel member 72 is assembled at a predetermined position, the opening 60A is closed by the restriction channel holding portion 18H. In this way, by configuring the opening 60A so that the movable plate 32 can be inserted in the axial direction S, the movable plate 32 can be compared with the case where the opening is configured on the radially outer side of the movable plate storage portion 60. Can be prevented from coming out of the movable space 64R. In addition, since the separation channel 74 is formed in the restricting flow path member 72 so as to be longer than the outer diameter of the inner cylinder 12, it is possible to perform assembly from the radially outer side without interfering with the inner cylinder 12. it can.

The disclosures of Japanese application, Japanese Patent Application No. 2010-147486, Japanese Patent Application No. 2010-183358, Japanese Patent Application No. 2010-183357, Japanese Patent Application No. 2010-0795550, and Japanese Patent Application No. 2011-079549 are incorporated herein by reference in their entirety.
All documents, patent applications, and technical standards mentioned in this specification are to the same extent as if each individual document, patent application, and technical standard were specifically and individually described to be incorporated by reference, Incorporated herein by reference.

Claims (13)

1. A cylindrical outer cylinder connected to one of the vibration generating part and the vibration receiving part;
   An inner cylinder connected to the other of the vibration generating part and the vibration receiving part and arranged along the cylinder axis direction of the outer cylinder so as to penetrate the cylinder of the outer cylinder;
   An elastic body disposed between the inner cylinder and the outer cylinder and elastically connecting the inner cylinder and the outer cylinder;
   A pair of liquid chambers in which at least a part of an inner wall is configured by the elastic body, and is configured to be spaced apart in the circumferential direction between the inner cylinder and the outer cylinder;
   A first restricting channel for communicating between the pair of liquid chambers;
   A second restriction channel configured along the circumferential direction inside the outer cylinder, set to correspond to a higher frequency than the first restriction channel, and communicating between the pair of liquid chambers;
   A pair of width plate portions that are arranged opposite to each other in the circumferential direction so as to divide the second restriction flow path and have a liquid communication hole, and a movable portion that is configured between the pair of width plate portions A movable plate unit having a movable plate disposed in the space and movable between the pair of width plate portions in a direction along the second restricted flow path and capable of closing the communication hole;
   Anti-vibration device with
2. The movable plate unit is formed in a box shape having the pair of width plate portions as one of opposing surfaces, the movable space is configured in a box, and the movable plate is accommodated in the box. The vibration isolator according to claim 1.
3. An intermediate cylinder that is disposed between the outer cylinder and the inner cylinder, to which the elastic body is fixed, and has a second inner circumferential portion that is disposed along the inner circumference of the second restriction channel;
   The clamping part which clamps the said movable plate unit between the said outer cylinders by the outer surface side of the said 2nd inner peripheral part of the said intermediate | middle cylinder is comprised, The Claim 1 or Claim 2 characterized by the above-mentioned. The vibration isolator as described.
4. 2. The movable plate unit includes an opening that communicates with the movable space and allows the movable plate to be inserted in a direction along a cylinder axis of the inner cylinder. 4. The vibration isolator according to any one of 3 above.
5. The first restriction flow path, the second restriction flow path, the width plate portion, and the movable space are configured, and are arranged along the circumferential direction inside the outer cylinder on the radially outer side of the liquid chamber. The vibration isolator according to any one of claims 1 to 4, further comprising a restricted flow path member.
6. 6. The vibration isolator according to claim 5, wherein the restricted flow path member is constituted by two members divided by a portion constituting the movable space.
7. 7. The projection according to claim 1, wherein a protrusion that is inserted into the communication hole is formed at a position corresponding to the communication hole on at least one surface of the movable plate. Anti-vibration device according to item.
8. The vibration isolator according to claim 7, wherein the protrusion has a length that can penetrate the communication hole.
9. The said communication hole is set to the dimension from which the said protrusion becomes non-contact with the hole edge of the said communication hole at the time of the maximum displacement in the said movable space of the said movable plate. Item 9. The vibration isolator according to item 8.
10. 10. The first restriction channel according to claim 1, wherein the first restriction channel is configured on the opposite side of the second restriction channel across the inner cylinder when viewed from the cylinder axis direction. The vibration isolator of Claim 1.
11. A pair of width plate portions that are arranged opposite to each other in the liquid flow direction to form a movable space and have a liquid communication hole, and a connection that connects the pair of width plate portions while maintaining a separation distance. A movable plate that is disposed in a movable space configured between the pair of width plate portions and is movable in the flow direction and capable of closing the communication hole. A method for manufacturing a movable plate unit comprising:
    A movable plate material forming the movable plate is placed in contact with a part of the storage member facing the movable space, and the movable plate is formed.
    Thereafter, the movable plate unit is manufactured by moving the movable plate in the movable space in the flow direction.
12. 12. The method of manufacturing a movable plate unit according to claim 11, wherein, in the forming process, the movable plate material is disposed in contact with an inner surface of one of the width plate portions.
13. The storage member has a split shape capable of opening and closing the movable space,
    The said forming process WHEREIN: A part of the divided | segmented storage member is arrange | positioned in a metal mold | die, and the said movable plate material is inject | emitted to the said movable space in a metal mold | die. A method for manufacturing the movable plate unit according to claim 12.

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