JP5286167B2 - Anti-vibration device manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a vibration isolator that is applied to, for example, automobiles and industrial machines and absorbs and attenuates vibrations of a vibration generating unit such as an engine.

As this type of vibration isolator, conventionally, as shown in, for example, Patent Document 1 below, a cylindrical first mounting member connected to one of a vibration generating unit and a vibration receiving unit, and the other is used. A second mounting member to be connected; an elastic body for elastically connecting the first mounting member and the second mounting member; and a liquid chamber in the first mounting member, wherein the elastic body is a part of the wall surface. A partition member that is divided into a main liquid chamber and a sub liquid chamber on the other side and that has a communication passage that communicates the main liquid chamber and the sub liquid chamber, and a diaphragm that forms part of the wall surface of the sub liquid chamber A configuration including the above is known. The liquid chamber is filled with a sealing liquid containing at least a first liquid and a second liquid that are incompatible with each other.
By the way, as a manufacturing method of such a vibration isolator, a method of assembling the vibration isolator in a liquid is known. In this method, first, a step of producing a vibration isolator main body in which a first attachment member and a second attachment member are connected via an elastic body is performed. Next, the vibration isolator main body is put into a pool in which the encapsulated liquid is stored, and the partition member and the diaphragm are assembled to the anti-vibration apparatus main body in the pool (in the encapsulated liquid). Thereby, the sealing liquid can be sealed in the liquid chamber.

Japanese Patent No. 2860701

  However, when the encapsulating liquid is composed of two or more incompatible liquids, in the conventional vibration isolator manufacturing method, a plurality of types of liquids contained in the encapsulating liquid are separated in the pool. Therefore, there is a problem that it is difficult to seal these plural kinds of liquids in the liquid chamber at a predetermined ratio. For this reason, the vibration isolator manufactured by the conventional manufacturing method has a problem that the ratio of the plurality of types of liquids enclosed in the liquid chamber is likely to vary, and as a result, the performance of the vibration isolator is not stable. To do.

  By the way, as a result of intensive studies, the present inventor has adopted cavitation when, for example, fluorine oil or the like is employed as the second liquid, ethylene glycol or the like is employed as the first liquid, and the content ratio of the second liquid is smaller than that of the first liquid. Generation | occurrence | production of this was suppressed, and it came to the knowledge that this effect was greatly dependent on the content ratio of the 1st, 2nd liquid especially. That is, in order to suppress the occurrence of cavitation, it is indispensable to seal a plurality of types of liquids in the liquid chamber with a predetermined ratio with high accuracy.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to seal a first liquid and a second liquid that are incompatible with each other in a liquid chamber at a predetermined ratio. An object of the present invention is to provide a method of manufacturing a vibration isolator capable of improving the performance stability of the vibration device.

In order to solve the above problems, the present invention proposes the following means.
The vibration isolator manufacturing method according to the present invention includes a cylindrical first mounting member connected to one of the vibration generating unit and the vibration receiving unit, and a second mounting member connected to the other, An elastic body that elastically connects the first mounting member and the second mounting member; a liquid chamber in the first mounting member; a main liquid chamber on one side having the elastic body as a part of a wall surface; A partition member that is divided into a secondary liquid chamber on the side and in which a communication passage that communicates the main liquid chamber and the secondary liquid chamber is formed, and a diaphragm that forms a part of the wall surface of the secondary liquid chamber, A method of manufacturing a liquid-sealed vibration isolator in which a liquid containing at least a first liquid and a second liquid that are incompatible with each other is sealed in the liquid chamber, wherein the first liquid contains the first liquid A vibration isolator body in which one attachment member and the second attachment member are connected by the elastic body And an intermediate member production step of assembling the partition member to any one of the diaphragms to produce an intermediate member provided with either one of a main liquid chamber and a sub liquid chamber, and in the first liquid, An extraction pipe is inserted into the communication path of the partition member, the second liquid is poured out from the tip of the extraction pipe, and the second liquid is injected into one of the main liquid chamber and the sub liquid chamber. In the second liquid injection step and in the first liquid, either one of the vibration isolator main body and the diaphragm is assembled to the intermediate member, and the other of the main liquid chamber and the sub liquid chamber is defined. And an in-liquid assembly step of sealing the first liquid and the second liquid in the liquid chamber.

  According to this invention, since the second liquid is injected into one of the main liquid chamber and the sub liquid chamber at the time of the second liquid injection process, from the second liquid injection process to the submerged assembly process. Meanwhile, the second liquid can be kept inside the one. Therefore, the first liquid and the second liquid can be sealed in the liquid chamber at a predetermined ratio, and the performance stability of the vibration isolator can be improved.

  In the second liquid injection step, the second liquid is supplied to the tip of the discharge pipe in a state where the tip of the discharge pipe is brought into one of the main liquid chamber and the sub liquid chamber. You may pour out from a part and inject | pour into said one inside.

  In this case, at the time of the second liquid injection step, the second liquid is supplied to the tip of the pouring tube while the tip of the pouring tube is brought into one of the main liquid chamber and the sub liquid chamber. Therefore, the second liquid can be reliably injected into the inside of the one.

  The second liquid injection step includes a liquid chamber compression step of compressing either one of the main liquid chamber and the sub liquid chamber, and a tip portion of the discharge pipe by inserting the extraction pipe into the communication path. And a decompression step of releasing the one compression after or after the second liquid is poured out.

  In this case, after the second liquid injection step inserts the extraction pipe into the communication path and extracts the second liquid from the tip of the extraction pipe, either the main liquid chamber or the auxiliary liquid chamber Since the compression release step for releasing the compression of either one is provided, at the time of the compression release step, the one expands and the inside thereof becomes negative pressure, and the liquid in the communication path is sucked into the one. Therefore, even when the second liquid poured out from the dispensing pipe stays in the communication passage, the second liquid is sucked into the one of the above and reliably injected during the decompression step. be able to.

  According to the present invention, the first liquid and the second liquid that are incompatible with each other can be sealed in the liquid chamber at a predetermined ratio, and the performance stability of the vibration isolator can be improved.

It is a longitudinal cross-sectional view of the vibration isolator which concerns on 1st Embodiment of this invention. It is one process figure explaining the manufacturing method of the vibration isolator shown in FIG. It is one process figure explaining the modification of the manufacturing method of the vibration isolator which concerns on 1st Embodiment of this invention. It is one process figure explaining the manufacturing method of the vibration isolator which concerns on 2nd Embodiment of this invention. It is one process figure explaining the manufacturing method of the vibration isolator which concerns on 2nd Embodiment of this invention.

(First embodiment)
Hereinafter, a vibration isolator according to a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the vibration isolator 10 includes a cylindrical first mounting member 11 connected to one of the vibration generating unit and the vibration receiving unit, and a second mounting member 12 connected to the other, An elastic body 13 that elastically connects the first mounting member 11 and the second mounting member 12, and a liquid chamber 17 formed in the first mounting member 11, which will be described later, a main liquid chamber 14 and a sub liquid chamber. 15, and a diaphragm 19 that forms a part of a wall surface of the sub-liquid chamber 15 to be described later.

Each of these members is formed in a circular shape or an annular shape when viewed from above, and is disposed coaxially with the central axis O as a common axis. In the following, the direction orthogonal to the central axis O is referred to as the radial direction.
When the vibration isolator 10 is mounted on, for example, an automobile, the second mounting member 12 is connected to an engine as a vibration generating unit, while the first mounting member 11 is a vibration receiving unit via a bracket (not shown). By connecting to the vehicle body, it is possible to suppress the vibration of the engine from being transmitted to the vehicle body.

The first attachment member 11 connects the small diameter portion 11a on one side in the direction of the central axis O, the large diameter portion 11b on the other side in the direction of the central axis O, and the small diameter portion 11a and the large diameter portion 11b. A step portion 11c, and the small diameter portion 11a, the large diameter portion 11b, and the step portion 11c are arranged coaxially with the central axis O and are integrally formed of, for example, a metal material.
The second mounting member 12 extends in the direction of the central axis O and is connected to the vibration generating portion, and the second mounting member 12 is connected to the other end of the mounting cylindrical portion 12a on the other side in the direction of the central axis O. And a reinforcing cylinder portion 12b projecting toward the other side. An internal thread portion is formed on the inner peripheral surface of the mounting cylinder portion 12a, and the vibration generating portion is connected to the second mounting member 12 by being screwed to the internal thread portion. Further, the mounting cylinder portion 12a has one end portion on one side in the direction of the central axis O that is outside the one end opening surface on the one side in the direction of the central axis O of the first mounting member 11 (one side in the direction of the central axis O). Protruding to the side). The reinforcement cylinder part 12b is formed in the bottomed cylinder shape, The bottom wall part has obstruct | occluded the opening part of the other side of the said center axis line O of the attachment cylinder part 12a. Moreover, the diameter of the peripheral wall portion of the reinforcing cylinder portion 12b is gradually increased from one side in the central axis O direction toward the other side.

  The elastic body 13 closes the one end opening 11 </ b> A on one side of the first attachment member 11 in the direction of the central axis O. In the illustrated example, the elastic body 13 is formed in a columnar shape, and the outer peripheral surface of one end portion on one side in the direction of the central axis O is vulcanized and bonded to the inner peripheral surface of the small diameter portion 11a. One end opening 11A of member 11 is closed. In the elastic body 13, a portion located inside the first attachment member 11 in the attachment cylinder portion 12 a and the reinforcement cylinder portion 12 b are embedded.

  In the elastic body 13, the other end surface 13a facing the other side in the central axis O direction is located on the other side in the central axis O direction with respect to the other edge of the small diameter portion 11a in the central axis O direction. doing. At the outer peripheral edge portion of the other end surface 13a, a notch portion is formed continuously around the central axis O over the entire circumference. And the notch surface 13b which defines the said notch part in the elastic body 13 is formed so that it may gradually incline toward the one side from the other side of the said central axis O direction toward the outer side from the inner side of radial direction. The outer peripheral surface of the elastic body 13 reaches the one end of the elastic body 13.

  In the present embodiment, a coating film 13c extending along the inner peripheral surface of the first mounting member 11 is connected to the outer peripheral surface of the one end portion of the elastic body 13 toward the other side in the central axis O direction. Has been. The coating film 13 c is formed integrally with the elastic body 13 and is vulcanized and bonded over the entire area of the inner peripheral surface of the first mounting member 11 where the one end of the elastic body 13 is not vulcanized and bonded. ing. Thereby, the inner peripheral surface of the 1st attachment member 11 is covered with the elastic body 13 and the coating film 13c over the whole region. In the illustrated example, the elastic body 13 and the coating film 13c are integrally formed of an elastic body such as a rubber-like elastic material or synthetic resin.

The diaphragm 19 is disposed in the other end opening 11 </ b> B on the other side of the first attachment member 11 in the direction of the central axis O. The diaphragm 19 is formed in an inverted bowl shape that bulges from the other end opening surface on the other side of the first mounting member 11 in the central axis O direction toward the outer side (the other side) in the central axis O direction. . Further, in the illustrated example, a diaphragm ring 19 a formed of a resin material or a metal material is coaxial with the central axis O at an opening end on one side in the central axis O direction, which is an outer peripheral edge of the diaphragm 19. Buried.
The diaphragm ring 19a is a caulking portion formed by bending the other end of the other side of the large-diameter portion 11b of the first mounting member 11 in the direction of the central axis O toward the inside in the radial direction over the entire circumference. The diaphragm 19 closes the other end opening 11 </ b> B of the first attachment member 11 by being caulked and fixed to 11 d.

In the above configuration, a portion of the inside of the first mounting member 11 located between the diaphragm 19 and the elastic body 13 is liquid-tightly closed by the diaphragm 19 and the elastic body 13, and the sealed liquid L described later Is a liquid chamber 17 in which is sealed.
Then, the liquid chamber 17 has the elastic body 13 in a part of the wall surface by the partition member 16, and the main liquid chamber 14 in which the internal volume changes due to the deformation of the elastic body 13, and the diaphragm 19 in a part of the wall surface. The diaphragm 19 is partitioned into a secondary liquid chamber 15 whose internal volume changes due to deformation of the diaphragm 19.

  The partition member 16 includes an annular partition member body 16a, a first partition plate 16b and a second partition plate 16c that are spaced apart from each other in the central axis O direction, and a space between these partition plates 16b and 16c. The membrane 16d is disposed on the outer side in the radial direction, and the accommodating cylinder 16e that surrounds the membrane 16d from the outside in the radial direction and defines the membrane accommodating space 16f that accommodates the membrane 16d together with the partition plates 16b and 16c.

  In the illustrated example, the partition member main body 16 a is fitted in the large diameter portion 11 b of the first attachment member 11. Further, the first partition plate 16b is disposed on one side in the central axis O direction, and the second partition plate 16c is disposed on the other side in the central axis O direction. The outer peripheral surface of the first partition plate 16b is connected to the inner peripheral surface of the partition member main body 16a. The partition member main body 16a and the first partition plate 16b are integrally formed of, for example, a metal material or a synthetic resin material. Has been. The accommodating cylinder 16e extends from the outer peripheral edge of the second partition plate 16c toward one side in the direction of the central axis O and is disposed on the first partition 16b. A membrane 16d formed in a disk shape with a rubber-like elastic material is disposed in a membrane housing space 16f on the radially inner side of 16e.

A plurality of flow holes 16g penetrating the partition plates 16b and 16c in the direction of the central axis O are formed at positions facing the membrane 16d in the first partition plate 16b and the second partition plate 16c.
In the partition member 16 thus formed, the flow holes 16g and the membrane housing space 16f formed in the partition plates 16b and 16c communicate with the main liquid chamber 14 and the sub liquid chamber 15 through the membrane housing space 16f. Central communication path (communication path) 23 is configured.
In the illustrated example, there is a gap between the first partition plate 16 b and the other end surface 13 a of the elastic body 13.

Further, the partition member 16 communicates with the main liquid chamber 14 and the sub liquid chamber 15, and a restricting passage (communication passage) that causes liquid column resonance by flowing a liquid L (described later) in the liquid chamber 17. 24 is formed.
In the illustrated example, a circumferential groove serving as the restriction passage 24 is formed on the outer circumferential surface of the partition member main body 16a, and this circumferential groove is the coating film 13c (the large diameter portion 11b of the first mounting member 11). Thus, the restriction passage 24 is formed by being closed from the outside in the radial direction. The restriction passage 24 has one circumferential end portion of the circumferential groove opened toward the other side in the direction of the central axis O to communicate with the auxiliary liquid chamber 15, and the other circumferential end portion of the circumferential groove has It opens toward the inside in the radial direction and communicates with the main liquid chamber 14.

  In the illustrated example, the main liquid chamber 14 is provided with a storage recess 21 into which the second liquid L2 is injected in a second liquid injection step described later. In the present embodiment, the storage recess 21 is defined in an annular shape with the cutout surface 13b of the elastic body 13 and the inner peripheral surface (the surface of the coating film 13c) of the small diameter portion 11a of the first mounting member 11 as wall surfaces. Yes.

  The sealed liquid L sealed in the liquid chamber 17 contains a first liquid L1 (see FIG. 2) and a second liquid L2 (see FIG. 2) that are incompatible, that is, insoluble in each other. The weight ratio of the second liquid L2 contained in the sealing liquid L is smaller than that of the first liquid L1. The second liquid L2 has a higher vapor pressure and a lower surface tension than the main component of the first liquid L1 at at least one point in the temperature range from −30 ° C. to 100 ° C. For example, the vapor pressure of the second liquid L2 is more than twice the vapor pressure of the main component of the first liquid L1 at the same temperature. The second liquid L2 has a lower viscosity than the first liquid L1. The second liquid L2 has a lower polarity than the first liquid L1.

Examples of the first liquid L1 include those containing at least one of ethylene glycol and propylene glycol, and examples of the second liquid L2 include at least one of silicone oil and fluorine oil. The thing etc. which contain are mentioned. The first liquid L1 may contain at least one of water, ethylene glycol, and propylene glycol, for example. Further, the sealing liquid L contains the first liquid L1 in the range of 60% by weight to 99.9% by weight and the second liquid L2 in the range of 0.1% by weight to 40% by weight. Preferably, the sealing liquid L contains the first liquid L1 in the range of 80 wt% to 99 wt% and the second liquid L2 in the range of 1 wt% to 20 wt%. For example, 80 cc to 200 cc of the first liquid L1 is included in the sealing liquid L, and 0.5 cc to 5 cc of the second liquid L2 is included.
In the illustrated example, the encapsulated liquid L is an infinite number of second liquids L2 that are granular when at least a large vibration (load) is input to the vibration isolator 10 due to road surface unevenness or the like. It becomes the aspect distributed in the state mutually independent in.

Furthermore, in the present embodiment, the vibration isolator 10 is a suspended type that is attached and used so that the main liquid chamber 14 is positioned on the lower side in the vertical direction and the sub liquid chamber 15 is positioned on the upper side in the vertical direction. ing. That is, the vibration isolator 10 is attached such that one side in the central axis O direction is positioned on the lower side in the vertical direction and the other side in the central axis O direction is positioned on the upper side in the vertical direction.
In the vibration isolator 10 formed in this way, the elastic body 13 is deformed in accordance with the input of vibration and the internal volume of the main liquid chamber 14 is changed, so that the sealed liquid L is in contact with the main liquid chamber 14 and the auxiliary liquid. The vibration is absorbed and damped by the liquid column resonance that occurs through the restriction passage 24 between the chamber 15 and the chamber 15.

  Next, a method for manufacturing the vibration isolator 10 having the above-described configuration will be described with reference to FIGS. In the present embodiment, the case where the specific gravity of the second liquid L2 is higher than the specific gravity of the first liquid L1 will be described as an example.

First, an anti-vibration device body manufacturing step is performed for manufacturing the anti-vibration device body 20 in which the first mounting member 11 and the second mounting member 12 are connected by the elastic body 13.
More specifically, first, the first mounting member 11 and the second mounting member 12 are respectively arranged at predetermined positions in a vibration isolator main body mold (not shown) for forming the elastic body 13 and the coating film 13c. At the same time, the first mounting member 11 and the second mounting member 12 are each subjected to adhesive ground treatment, and then an adhesive is applied. Thereafter, unvulcanized rubber is injected into the vibration isolator main body mold to mold the elastic body 13, and the coating film 13 c is molded integrally with the elastic body 13. Subsequently, the elastic body 13 and the coating film 13c are vulcanized by applying sulfur gas, pressure and heat, respectively. And the anti-vibration apparatus main body 20 is produced by demolding the said anti-vibration apparatus main body metal mold | die.

Moreover, the partition member preparation process which produces the partition member 16 is performed.
More specifically, first, the partition member main body 16a and the first partition plate 16b, the second partition plate 16c, and the accommodating cylinder portion 16e are integrally formed. Thereafter, the first partition plate 16b and the housing cylinder portion 16e are joined to each other in a state where the membrane 16d is disposed in the membrane housing space 16f defined by the first partition plate 16b, the second partition plate 16c, and the housing tube portion 16e. The partition member 16 is produced.

Further, a diaphragm manufacturing step for manufacturing the diaphragm 19 is performed.
More specifically, a diaphragm ring 19a is disposed at a predetermined position in a diaphragm mold (not shown) for forming the diaphragm 19, and an adhesive is applied after the surface of the diaphragm ring 19a is subjected to an adhesive base treatment. . Thereafter, unvulcanized rubber is injected into the diaphragm mold to form the diaphragm 19, and then the diaphragm 19 is vulcanized by applying sulfur gas, pressure and heat, respectively. And the diaphragm 19 by which the diaphragm ring 19a was embed | buried under the outer peripheral part by producing the said diaphragm metal mold | die is produced.

Next, as shown in FIG. 2, a submerged arrangement step of arranging the vibration isolator main body 20 and the partition member 16 in the first liquid L1 is performed.
More specifically, the anti-vibration device body 20 and the partition member 16 are immersed in the first liquid L1 stored in the pool P, and the anti-vibration device body 20 so that air does not remain inside or on the surface of each. Is appropriately swung in the first liquid L1. At this time, in the present embodiment, the diaphragm 19 is also disposed in the first liquid L1.
As described above, the vibration isolator body 20, the partition member 16, and the diaphragm 19 are disposed in the first liquid L1. In FIG. 2, the illustration of the diaphragm 19 is omitted for easy viewing of the drawing.

  Next, the partition member 16 is assembled to one of the vibration isolator main body 20 and the diaphragm 19 in the first liquid L1, and either the main liquid chamber 14 or the sub liquid chamber 15 is provided. An intermediate member manufacturing step for manufacturing the intermediate member is performed. In the present embodiment, in the first liquid L1 stored in the pool P, the partition member 16 enters the first mounting member 11 of the vibration isolator main body 20 and is assembled to the vibration isolator main body 20, and the main liquid chamber An intermediate member 22 having 14 is produced.

Next, in the first liquid L <b> 1, the extraction pipe N is inserted into the restriction passage 24 of the partition member 16, and the second liquid L <b> 2 is extracted from the distal end portion of the extraction pipe N to enter the main liquid chamber 14. A second liquid injection step for injecting the two liquids L2 is performed. In the present embodiment, in the second liquid injection step, the second liquid L2 is poured out from the distal end portion of the dispensing pipe N in a state where the distal end portion of the dispensing pipe N reaches the inside of the main liquid chamber 14. Inject into the main liquid chamber 14. In the example shown in the drawing, the extraction pipe N has flexibility that can be deformed according to the shape of the restriction passage 24, and is formed of a material having a lower hardness than the material forming the partition member 16, for example. Yes.
Specifically, first, the orientation of the intermediate member 22 is adjusted so that the main liquid chamber 14 is positioned vertically downward with respect to the partition member 16 in the first liquid L1 stored in the pool P. Next, the discharge pipe N is inserted into the restriction passage 24 and is passed through the restriction passage 24 while being deformed according to the shape of the restriction passage 24, and the tip of the discharge pipe N is brought into the main liquid chamber 14. At this time, in the present embodiment, the distal end portion of the dispensing pipe N is brought into the vertical upper side of the storage recess 21 or the inside of the storage recess 21 in the main liquid chamber 14. In addition, an unillustrated dispenser for extracting the second liquid L2 from the tip end of the extraction pipe N is connected to the extraction pipe N. And after inserting the extraction pipe | tube N and connecting the said extraction device to the extraction pipe | tube N, the 2nd liquid L2 is poured out from the front-end | tip part of this extraction pipe | tube N, and the inside of the storage recessed part 21 of the main liquid chamber 14 Inject.

Next, in the first liquid, the diaphragm 19 is assembled to the intermediate member 22 to define the sub liquid chamber 15, and the first liquid L 1 and the second liquid L 2 are sealed in the liquid chamber 17. I do.
More specifically, first, the diaphragm 19 enters the first attachment member 11 of the intermediate member 22 in the first liquid L1 stored in the pool P. Then, the large-diameter portion 11b of the first mounting member 11 is reduced in diameter, and the other end portion of the large-diameter portion 11b is bent radially inward over the entire circumference to form a crimped portion 11d to form the diaphragm ring 19a. Secure with caulking. Thereby, the sub liquid chamber 15 is defined, the liquid chamber 17 is sealed, and the first liquid L1 and the second liquid L2 are sealed in the liquid chamber 17.
As described above, the vibration isolator 10 is formed in the first liquid L1 stored in the pool P.

  Next, after the formed vibration isolator 10 is taken out from the first liquid L1, the first liquid L1 on the surface of the vibration isolator 10 is washed away. Thereby, the vibration isolator 10 is completed.

According to the above-described method for manufacturing the vibration isolator 10 according to the present embodiment, the second liquid L2 is injected into the main liquid chamber 14 during the second liquid injection process. The second liquid L2 can be kept inside the main liquid chamber 14 until the submerged assembly process. Therefore, the first liquid L1 and the second liquid L2 can be sealed in the liquid chamber 17 at a predetermined ratio, and the performance stability of the vibration isolator 10 can be improved.
Further, during the second liquid injection step, the second liquid L2 is poured out from the tip end portion of the pouring pipe N in a state where the tip end portion of the pouring pipe N reaches the inside of the main liquid chamber 14. 14, the second liquid L <b> 2 can be reliably injected into the main liquid chamber 14.

  In the present embodiment, in the second liquid injection step, the second liquid L2 is extracted by inserting the extraction pipe N into the restriction passage 24 of the partition member 16, but the present invention is not limited to this. For example, as shown in FIG. 3, in the second liquid injection step, the extraction pipe N may be inserted into the central communication path 23. In this case, the tip of the pouring pipe N can be brought into the main liquid chamber 14 through the flow hole 16g of the partition member 16 and the membrane housing space 16f.

  In the present embodiment, in the second liquid injection step, the extraction pipe N is positioned so that the tip of the extraction pipe N is positioned vertically above the storage recess 21 or inside the storage recess 21 in the main liquid chamber 14. N is inserted and the second liquid L2 is injected into the storage recess 21. However, the present invention is not limited to this. For example, the second liquid L <b> 2 may be injected into the main liquid chamber 14 by inserting the extraction pipe N so that the tip of the extraction pipe N simply reaches the main liquid chamber 14.

(Second Embodiment)
Hereinafter, the manufacturing method of the vibration isolator which concerns on 2nd Embodiment of this invention is demonstrated with reference to drawings.
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different points will be described.
As shown in FIGS. 4 and 5, in the method for manufacturing the vibration isolator 10 according to the present embodiment, the second liquid injection process includes a liquid chamber compression process for compressing the main liquid chamber 14, and a discharge pipe into the restriction passage 24. A compression release step of releasing the compression of the main liquid chamber 14 after N is inserted and the second liquid L2 is poured out from the tip of the dispensing pipe N.

In the present embodiment, in the process of performing the second liquid injection process, as shown in FIG. 4, first, in the first liquid L <b> 1 stored in the pool P, the main liquid chamber 14 is perpendicular to the partition member 16. The direction of the intermediate member 22 is adjusted so as to be positioned on the lower side.
Next, a liquid chamber compression step is performed in which the elastic body 13 of the intermediate member 22 is pushed upward to compress the main liquid chamber 14. Thereafter, the distal end portion of the extraction pipe N is inserted into the main liquid chamber side end portion of the restriction passage 24 from the vertically upper side, and the second liquid L2 is poured into the restriction passage 24 from the distal end portion of the extraction pipe N. At this time, in this embodiment, the second liquid is not placed in the main liquid chamber side end portion of the restriction passage 24 but in the state where the tip end portion of the extraction pipe N is not brought into the main liquid chamber 14. L2 is poured out from the tip of the extraction pipe N into the restriction passage 24, and the extraction pipe N is not deformed according to the shape of the restriction passage 24.

  Thereafter, as shown in FIG. 5, a liquid chamber compression step is performed in the first liquid L <b> 1 to release the elastic body 13 and release the compression of the main liquid chamber 14. At this time, the main liquid chamber 14 expands to have a negative pressure therein, and the first liquid L1 and the second liquid L2 in the restriction passage 24 are sucked into the main liquid chamber 14. As a result, the second liquid L2 is injected into the main liquid chamber 14.

  According to the manufacturing method of the vibration isolator 10 according to the present embodiment as described above, the second liquid injection process includes the compression release process, and therefore the second liquid L2 poured out from the discharge pipe N. Even in the case where the second liquid L2 stays in the restriction passage 24, the second liquid L2 can be sucked into the main liquid chamber 14 and reliably injected during the compression release step.

Further, in the present embodiment, as described above, the second liquid L2 is reliably placed inside the main liquid chamber 14 after the extraction pipe N is inserted into the restriction passage 24 without being deformed according to the shape of the restriction passage 24. Can be injected into. Therefore, compared with the case where the extraction pipe N is deformed as described above, the insertion of the extraction pipe N into the restriction passage 24 and the extraction of the second liquid L2 from the extraction pipe N can be performed smoothly. Thus, the second liquid L2 can be injected efficiently and reliably.
In the present embodiment, the second liquid L2 is poured out from the distal end portion of the dispensing pipe N without reaching the distal end portion of the dispensing pipe N into the main liquid chamber 14. It is not limited.

The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, in each of the above-described embodiments, the diaphragm 19 is immersed in the first liquid L1 and disposed in the first liquid L1 during the submerged arrangement process. However, the diaphragm 19 is disposed in the first liquid L1 before the submerged assembly process. If it is arranged inside, it is not limited to this.

  In each of the above embodiments, the orientation of the intermediate member 22 is adjusted so that the main liquid chamber 14 is positioned vertically downward with respect to the partition member 16 during the second liquid injection step. It is not something that can be done. For example, the orientation of the intermediate member 22 may be adjusted so that the partition member 16 and the main liquid chamber 14 are aligned in the horizontal direction.

  In each of the above embodiments, the specific gravity of the second liquid L2 is higher than the specific gravity of the first liquid L1, but not limited to this, even if it is lower than the specific gravity of the first liquid L1. It may be equal to the specific gravity of the first liquid L1. Note that when the specific gravity of the second liquid L2 is lower than the specific gravity of the first liquid L1, the second liquid L2 floats in the first liquid L1, and therefore the main liquid is separated from the partition member 16 during the second liquid injection step. It is preferable to adjust the direction of the intermediate member 22 so that the liquid chamber 14 is positioned vertically upward.

In each of the above embodiments, the main liquid chamber 14 is provided with the storage recess 21, but the storage recess 21 may not be provided.
Moreover, in each said embodiment, although the clearance gap was opened between the 1st partition plate 16b of the partition member 16, and the said other end surface 13a of the elastic body 13, it is not restricted to this.

Moreover, in each said embodiment, although the intermediate member 22 provided with the main liquid chamber 14 by assembling | attaching the partition member 16 to the vibration isolator main body 20 at the time of an intermediate member preparation process, it replaced with this, for example, An intermediate member (not shown) including the auxiliary liquid chamber 15 may be fabricated by assembling the partition member 16 to the diaphragm 19.
In this case, in the second liquid injection step, the second liquid L2 is injected into the sub liquid chamber 15 of the intermediate member through the restriction passage 24 or the central communication passage 23 of the partition member 16. Then, during the submerged assembly process, the vibration isolator main body 20 is assembled to the intermediate member, the main liquid chamber 14 is defined, and the first liquid L1 and the second liquid L2 are sealed in the liquid chamber 17.
According to the method for manufacturing a vibration isolator as described above, the same effects as those of the method for manufacturing a vibration isolator described in the above embodiments can be obtained. In this case, the vibration isolator body production process may be performed after the intermediate member production process. Further, in this case, in the second liquid injection step, the second liquid L2 is poured out from the tip end portion of the discharge pipe N in a state where the tip end portion of the discharge pipe N reaches the inside of the sub liquid chamber 15. Alternatively, the second liquid injection process may include a liquid chamber compression process for compressing the sub liquid chamber 15, and an extraction pipe N inserted into the restriction passage 24. And a decompression step of releasing the compression of the secondary liquid chamber 15 after the second liquid L2 has been poured out from the front end portion of the secondary liquid chamber 15.

  The first liquid L1 and the second liquid L2 are not limited to those described above, and can be appropriately changed as long as they are incompatible liquids. For example, the second liquid L2 may have the same or lower vapor pressure than the main component of the first liquid L1 at the same temperature, and the surface tension of the second liquid L2 is equal to or higher than that of the first liquid L1. The viscosity may be equal to or higher than that of the first liquid L1. The second liquid L2 may have a higher polarity than the first liquid L1. Moreover, in each said embodiment, although the weight ratio of the 2nd liquid L2 contained in the sealing liquid L is smaller than the weight ratio of the 1st liquid L1, the weight ratio of the 2nd liquid L2 is made into the 1st liquid L1. It is also possible to make it equal to or larger than the weight ratio.

Further, in each of the above-described embodiments, the encapsulated liquid L is the first innumerable second liquid L2 that has become granular when at least a large vibration (load) is input to the vibration isolator 10 due to road surface unevenness or the like. Although the liquid L1 is dispersed in an independent state, the present invention is not limited to this. For example, the sealing liquid L may always be in the above-described mode, or may not be in the above-described mode when a large vibration is input to the vibration isolator 10.
Further, the liquid contained in the sealing liquid L is not limited to two kinds of liquids (first liquid L1 and second liquid L2), and may be a sealing liquid containing three or more kinds of liquids.

  Further, in each of the above-described embodiments, the diaphragm 19 includes the diaphragm ring 19a, and the diaphragm 19 (diaphragm ring 19a) is caulked and fixed to the caulking portion 11d of the first mounting member 11. However, the present invention is not limited thereto. The diaphragm ring 19a may not be provided. In this case, for example, the diaphragm may be fixed to the first attachment member or the partition member by a stopper or the like.

Moreover, the partition member 16 is not restricted to what was shown to the said each embodiment.
Further, although the restriction member 24 and the central communication passage 23 are formed in the partition member 16 as communication passages, the form of the communication passage is not limited to these.
Further, although the suspension type is shown as the vibration isolator 10, the compression type anti-vibration unit is used so that the main liquid chamber 14 is positioned on the upper side in the vertical direction and the sub liquid chamber 15 is positioned on the lower side in the vertical direction. It can also be applied to a vibration device.

  Further, the method for manufacturing a vibration isolator according to the present invention is not limited to the case of manufacturing the vibration isolator 10 as an engine mount of a vehicle, and can be applied to a vibration isolator other than the engine mount. is there. For example, the present invention can be applied to a case where a vibration isolator as a mount for a generator mounted on a construction machine is manufactured, or a vibration isolator as a mount for a machine installed in a factory or the like is manufactured. It is also possible to apply to cases.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 10 Vibration isolator 11 1st attachment member 12 2nd attachment member 13 Elastic body 14 Main liquid chamber 15 Sub liquid chamber 16 Partition member 17 Liquid chamber 19 Diaphragm 20 Anti-vibration apparatus main body 22 Intermediate member 23 Central communication path (communication path)
24 Restricted passage (communication passage)
L Fill liquid L1 1st liquid L2 2nd liquid N Extraction pipe

Claims (3)

A cylindrical first mounting member coupled to one of the vibration generating unit and the vibration receiving unit, and a second mounting member coupled to the other;
An elastic body that elastically connects the first mounting member and the second mounting member;
The liquid chamber in the first mounting member is partitioned into a main liquid chamber on one side and a sub liquid chamber on the other side having the elastic body as a part of a wall surface, and the main liquid chamber and the sub liquid chamber communicate with each other. A partition member formed with a communicating path;
A diaphragm forming a part of the wall surface of the sub liquid chamber,
A method for producing a liquid-sealed vibration isolator in which a liquid containing at least a first liquid and a second liquid that are incompatible with each other is sealed in the liquid chamber,
In the first liquid, the partition member is assembled to one of the vibration isolator main body in which the first attachment member and the second attachment member are connected by the elastic body, and the diaphragm. An intermediate member production step of producing an intermediate member provided with either one of the liquid chamber and the auxiliary liquid chamber;
In the first liquid, an extraction pipe is inserted into the communication passage of the partition member, and the second liquid is extracted from the tip of the extraction pipe, and is placed in one of the main liquid chamber and the sub liquid chamber. A second liquid injection step of injecting a second liquid;
In the first liquid, the other one of the vibration isolator main body and the diaphragm is assembled to the intermediate member to define one of the main liquid chamber and the sub liquid chamber, and the liquid chamber And a submerged assembly step for sealing the first liquid and the second liquid. It is a manufacturing method of the vibration isolator of Claim 1, Comprising:
In the second liquid injecting step, the second liquid is introduced from the distal end portion of the dispensing pipe in a state where the distal end portion of the dispensing pipe is brought into one of the main liquid chamber and the auxiliary liquid chamber. A method for manufacturing a vibration isolator, which is poured out and injected into the one of the insides. It is a manufacturing method of the vibration isolator of Claim 1 or 2,
The second liquid injecting step includes a liquid chamber compressing step of compressing either one of the main liquid chamber and the sub liquid chamber, and inserting the extraction pipe into the communication path and starting from the tip of the extraction pipe. A method for releasing the compression after the two liquids are dispensed or simultaneously, and a method for manufacturing the vibration isolator.

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