JP5210947B2 - 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 the above-described vibration isolator, conventionally, as shown in, for example, Patent Document 1 below, a cylindrical first mounting member connected to one of the vibration generating unit and the vibration receiving unit, the vibration generating unit, and A second mounting member connected to either one of the vibration receiving portions, an elastic body that elastically connects the first and second mounting members and closes an opening on one axial side of the first mounting member; A diaphragm that closes the opening on the other side in the axial direction of the first mounting member, a liquid chamber formed inside the first mounting member, a main liquid chamber whose elastic body is part of the partition, and a diaphragm that are part of the partition The structure provided with the partition member divided into the subliquid chamber used as a part is known. In the liquid chamber described above, a sealing liquid composed of two or more incompatible liquids having different specific gravities is sealed. Further, the partition member described above is formed with a restriction passage that communicates the main liquid chamber and the sub liquid chamber, and the above-described sealed liquid passes between the main liquid chamber and the sub liquid chamber through the restriction passage. It is possible to come and go.

  By the way, as a manufacturing method of the vibration isolator, there is a conventional method of assembling the vibration isolator in a liquid. In this method, first, a step of creating a vibration isolator main body by integrating the first mounting member, the second mounting member, and the elastic body is performed. Next, the vibration isolator main body is placed in a pool in which the encapsulated liquid is stored, and a partition member and a diaphragm are assembled in the anti-vibration apparatus main body in the pool (in the encapsulated liquid). Thereby, the sealing liquid can be sealed without air mixing into the liquid chamber.

  Further, as a method for manufacturing a vibration isolator, there is a conventional method in which a sealed liquid is vacuum-injected into a liquid chamber of an assembled vibration isolator. In this method, first, a step of creating a vibration isolator main body by integrating the first mounting member, the second mounting member, and the elastic body is performed. Next, a process of assembling the partition member and the diaphragm to the vibration isolator body is performed. Next, the liquid chamber of the assembled anti-vibration device is evacuated (depressurized), and then the liquid chamber in a vacuum state (negative pressure state) is communicated with the sealed tank storing the sealed liquid and the liquid chamber. The step of injecting the sealing liquid into Thereby, the sealing liquid can be sealed without air mixing into the liquid chamber.

Japanese Patent No. 2860701

However, when the sealing liquid is composed of two or more incompatible liquids, in the former method for manufacturing a vibration isolator, a plurality of liquids contained in the sealing liquid are separated in the pool. Therefore, there is a problem that it is difficult to enclose a predetermined ratio of the encapsulated liquid in the liquid chamber.
On the other hand, in the latter method for manufacturing a vibration isolator, when two or more incompatible liquids are mixed and stored in a sealed tank and vacuum injection is attempted, a plurality of liquids contained in the sealed liquid are contained. Is separated in the sealed tank, there is a problem that it is difficult to enclose a predetermined ratio of the encapsulated liquid in the liquid chamber.
As described above, the vibration isolator manufactured by the above-described conventional manufacturing method tends to vary in the ratio of the sealed liquid sealed in the liquid chamber, and as a result, there is a problem that the performance of the vibration isolator is not stable. To do.

  In the present invention, the above-described conventional problems are taken into consideration, and a sealed liquid containing a first liquid and a second liquid that are incompatible with each other can be sealed in a liquid chamber at a predetermined ratio. It aims at providing the manufacturing method of the vibration isolator which can improve the performance stability of a vibration apparatus.

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 partition; And a partition member that divides the auxiliary liquid chamber on the side, a restriction passage that communicates the main liquid chamber and the auxiliary liquid chamber is formed, and the liquid chamber is incompatible with each other. And a liquid-filled vibration isolator in which a liquid containing at least the second liquid is sealed, wherein at least the second liquid is filled in the liquid chamber in which the first liquid is sealed in the liquid chamber. A frozen body formed by freezing a liquid is stored in the portion that becomes the liquid chamber. It is characterized in.

With such a feature, when forming the frozen body of the second liquid, a predetermined amount of the second liquid desired in the sealed liquid sealed in the liquid chamber is frozen to form the frozen body. Then, after the liquid sealing step, the frozen body of the second liquid housed in the portion that becomes the liquid chamber is thawed, whereby a predetermined amount of the second liquid is mixed with the sealed liquid in the liquid chamber.
Even if the second liquid is a highly volatile liquid (low boiling point, high vapor pressure), since the second liquid is a frozen body, vaporization of the second liquid is suppressed at a low temperature. .
Moreover, the frozen body of the second liquid may be thawed by heating after the liquid filling step, or may be naturally thawed after the liquid filling step.

  In the vibration isolator manufacturing method according to the present invention, the liquid sealing step is formed by integrating the first mounting member, the second mounting member, and the elastic body in the first liquid. It is a step of sealing the first liquid in the liquid chamber by assembling at least the partition member to the vibration isolator main body.

  As a result, the partition member is assembled to the vibration isolator body in the first liquid to form the liquid chamber, so that air is not mixed when the first liquid is sealed in the liquid chamber, and the liquid chamber is in the first liquid. Filled with. In addition, since the pressure is not lowered or the temperature is not raised when the first liquid is sealed, even if the first liquid is a highly volatile liquid (low boiling point, high vapor pressure), Vaporized gas is not mixed into the liquid chamber.

  In the vibration isolator manufacturing method according to the present invention, the liquid sealing step is formed by integrating the first mounting member, the second mounting member, and the elastic body in the air. After assembling at least the partition member to the main body, the internal pressure of the liquid chamber is set to a negative pressure state, and then the first liquid is injected into the liquid chamber.

  Thereby, by making the liquid chamber into which the first liquid is injected into a negative pressure state, the first liquid can easily flow into the liquid chamber, and the liquid chamber is filled with the first liquid. In this case, it is preferable that the vapor pressure of the first liquid is lower than that of the second liquid, and the vapor pressure of the first liquid is lower than the internal pressure of the liquid chamber in the negative pressure state. This prevents the first liquid from evaporating when the first liquid is injected into the liquid chamber in the negative pressure state.

In the vibration isolator manufacturing method according to the present invention, it is preferable that a weight ratio of the second liquid contained in the sealing liquid is smaller than a weight ratio of the first liquid contained in the sealing liquid.
Thereby, since the volume of the frozen body is reduced, the frozen body can be easily accommodated even when the internal volume of the portion for accommodating the frozen body (the portion serving as the liquid chamber) is small.

Further, in the method for manufacturing a vibration isolator according to the present invention, the sealing liquid contains the first liquid in an amount of 60 wt% to 99.9 wt% and the second liquid in an amount of 0.1 wt% to 40 wt%. It is preferable to contain the following.
In the method for manufacturing a vibration isolator according to the present invention, it is preferable that the first liquid contains ethylene glycol alone or ethylene glycol and propylene glycol, and the second liquid contains silicone oil or fluorine oil.
Thereby, the damping effect of the vibration isolator is not reduced.

  According to the method for manufacturing a vibration isolator according to the present invention, it is possible to enclose an enclosing liquid containing a first liquid and a second liquid that are incompatible with each other in a liquid chamber at a predetermined ratio. The variation in the content ratio of the second liquid in the sealed liquid sealed in the chamber can be suppressed, and the performance stability of the vibration isolator can be improved.

It is sectional drawing of the vibration isolator for demonstrating embodiment of this invention. It is sectional drawing showing the liquid enclosure process of the vibration isolator for demonstrating the 1st Embodiment of this invention. It is sectional drawing showing the liquid enclosure process of the vibration isolator for demonstrating the 2nd Embodiment of this invention. It is sectional drawing showing the liquid enclosure process of the vibration isolator for demonstrating the 3rd Embodiment of this invention.

  Embodiments of a method for manufacturing a vibration isolator according to the present invention will be described below with reference to the drawings.

First, the structure of the vibration isolator 10 in this Embodiment is demonstrated based on FIG.
The vibration isolator 10 according to the present embodiment is connected to a cylindrical first mounting member 11 connected to one of the vibration generating unit and the vibration receiving unit, and to the other of the vibration generating unit and the vibration receiving unit. The second mounting member 12, the elastic body 13 that elastically connects the first mounting member 11 and the second mounting member 12, and the liquid chamber 17 formed inside the first mounting member 11 will be described later. And a partition member 16 that is divided into a main liquid chamber 14 and a sub liquid chamber 15.

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.
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). As a result, it is possible to suppress transmission of engine vibration to the vehicle body.

  The second mounting member 12 is formed in a columnar shape, and is disposed in one end opening portion of the first mounting member 11 in the central axis O direction. The first mounting member 11 is closed from one end side in the direction of the central axis O by being adhered to the outer peripheral surface of the second mounting member 12. An internal thread portion is formed on one end surface of the second mounting member 12. In addition, one end portion in the axial direction of the second mounting member 12 protrudes outward in the central axis O direction from one end opening surface of the first mounting member 11 in the central axis O direction.

  Further, a diaphragm 19 is disposed at the other end opening of the first mounting member 11 in the direction of the central axis O. The diaphragm 19 is formed in a circular shape when viewed from above, and is an inverted bowl-shaped body that opens toward the other end side in the direction of the central axis O. More specifically, the diaphragm 19 includes an annular diaphragm ring 19a and a film-like diaphragm rubber 19b stretched on the inner side of the diaphragm ring 19a. The outer peripheral edge of the diaphragm rubber 19b is vulcanized and bonded to the inner peripheral surface of the diaphragm ring 19a over the entire circumference. And when the diaphragm ring 19a is fitted in the other end opening of the first mounting member 11, the diaphragm 19 closes the first mounting member 11 from the other end side in the central axis O direction.

  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 a sealed liquid L described later is provided. The liquid chamber 17 is filled. The liquid chamber 17 includes a main liquid chamber 14 in which the partition member 16 has an elastic body 13 in a part of the partition wall and an internal volume is changed by deformation of the elastic body 13, and a diaphragm 19 in a part of the partition wall. The sub-liquid chamber 15 has an inner volume which is changed by deformation of the diaphragm 19.

Here, between the outer peripheral surface side of the partition member 16 and the inner peripheral surface side of the first mounting member 11, a restriction passage 24 extending along the circumferential direction of the first mounting member 11 is formed.
In the illustrated example, the partition member 16 includes an annular partition member main body 16b and a membrane 16a stretched inside the annular partition member main body 16b. The partition member main body 16b is a resin member, and a circumferential groove serving as the restriction passage 24 is formed on the outer peripheral surface thereof. The circumferential groove is closed from the outer side in the radial direction of the partition member 16 by a rubber film 18 covered on the inner peripheral surface of the first mounting member 11, whereby the main liquid chamber 14, the sub liquid chamber 15, And a restriction passage 24 in which liquid column resonance occurs when the liquid in the liquid chamber 17 circulates. The rubber film 18 is formed integrally with the elastic body 13, and the inner peripheral surface of the first mounting member 11 is covered with the elastic body 13 and the rubber film 18 over the entire area. The membrane 16a is a disk-shaped rubber member, and its outer edge is vulcanized and bonded to the inner peripheral surface of the annular partition member main body 16b. The membrane 16a allows the annular partition member main body 16b to be The inside is blocked.
Furthermore, in the present embodiment, the vibration isolator 10 is a compression type that is attached and 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. Yes.

  In the present embodiment, the sealing liquid L contains the first liquid L1 and the second liquid L2 that are incompatible, that is, insoluble in each other. The second liquid L2 has a higher freezing point than the first liquid L2, and the weight ratio contained in the sealed liquid L is small. The second liquid L2 has a vapor pressure higher than that of the first liquid L1 in a temperature range of at least −30 ° C. and not more than 100 ° C. For example, the vapor pressure of the second liquid L2 is more than twice the vapor pressure of the first liquid L1. The second liquid L2 has a lower viscosity than the first liquid L1.

Examples of the first liquid L1 include those containing ethylene glycol and propylene glycol, or ethylene glycol alone, and examples of the second liquid L2 include silicone oil or fluorine oil. Further, the sealing liquid L contains the first liquid L1 in the range of 60 wt% to 99.9 wt% and the second liquid L2 in the range of 0.1 wt% to 40 wt%. 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.
Further, the sealed liquid L is a mode in which the second liquid L2 is dispersed in a number of places in the first liquid L1 when at least a large vibration (load) is input to the vibration isolator 10 due to road surface unevenness or the like. become.

[First Embodiment]
Next, a first embodiment of a method for manufacturing the vibration isolator 10 having the above-described configuration will be described.

First, the anti-vibration device main body creating step of creating the anti-vibration device main body 20 by integrating the first attachment member 11, the second attachment member 12, and the elastic body 13 is performed.
More specifically, first, the first mounting member 11 and the second mounting member 12 are respectively set in molds (not shown) for forming the elastic body 13 and the rubber film 18 (vibration isolation device body mold). The adhesive is applied after the adhesive base treatment is performed on the inner peripheral surface of the first mounting member 11 and the outer peripheral surface of the second mounting member 12. Thereafter, unvulcanized rubber is injected into the above vibration isolator main body mold to mold the elastic body 13, and the rubber film 18 is molded integrally with the elastic body 13. Subsequently, the elastic body 13 and the like are vulcanized by applying sulfur gas, pressure and heat to the elastic body 13 and the like, respectively. At this time, the elastic body 13 is bonded to the inner peripheral surface of the first mounting member 11 and the outer peripheral surface of the second mounting member 12, and the rubber film 18 is bonded to the inner peripheral surface of the first mounting member 11. Then, the anti-vibration device body 20 is formed by removing the above-described anti-vibration device body mold.

Moreover, the partition member creation process which forms the membrane 16a inside the annular partition member main body 16b and creates the partition member 16 is performed.
More specifically, the partition member main body 16b is disposed at a predetermined position in a mold (membrane mold) (not shown) for forming the membrane 16a, and the inner surface of the partition member main body 16b is bonded to the base surface. After applying, apply an adhesive. Thereafter, unvulcanized rubber is injected into the above-mentioned membrane mold to form the membrane 16a, and then the membrane 16a is vulcanized by applying sulfur gas, pressure and heat to the membrane 16a. At this time, the outer peripheral edge of the membrane 16a is bonded to the inner peripheral surface of the partition member main body 16b. And the partition member 16 by which the membrane 16a was stretched | stretched inside the partition member main body 16b is formed by removing the above-mentioned membrane metal mold | die.

Further, a diaphragm creating step is performed in which the diaphragm rubber 19b is formed inside the diaphragm ring 19a to create the diaphragm 19.
More specifically, a diaphragm ring 19a is disposed at a predetermined position in a mold (diaphragm mold) (not shown) for forming the diaphragm rubber 19b, and an adhesive base treatment is applied to the inner peripheral surface of the diaphragm ring 19a. After application, an adhesive is applied. Thereafter, unvulcanized rubber is injected into the diaphragm mold described above to form the diaphragm rubber 19b, and then the diaphragm rubber 19b is vulcanized by applying sulfur gas, pressure and heat to the diaphragm rubber 19b. At this time, the outer peripheral edge portion of the diaphragm rubber 19b is bonded to the inner peripheral surface of the diaphragm ring 19a. Then, by removing the diaphragm mold described above, the diaphragm 19 is formed in which the diaphragm rubber 19b is stretched inside the diaphragm ring 19a.

Next, in the first liquid L1, the partition member 16 and the diaphragm 19 described above are assembled to the vibration isolator main body 20, and a liquid sealing step (submerged assembly step) for sealing the first liquid L1 in the liquid chamber 17 is performed. .
Specifically, as shown in FIG. 2, the vibration isolator body 20 is submerged in the pool P in which the first liquid L1 is stored. At this time, the vibration isolator body 20 is arranged with the second attachment member 12 side (one end opening side of the first attachment member 11) facing downward. Further, the vibration isolator body 20 is appropriately swung in the pool P so that air does not remain in the first mounting member 11.

Subsequently, the partition member 16 is put into the pool P, and the partition member 16 is fitted inside the first mounting member 11 in the first liquid L1 and the partition member 16 is assembled to the vibration isolator body 20. At this time, the frozen body L2 ′ of the second liquid L2 is accommodated in the portion that becomes the main liquid chamber 14 (above the elastic body 13 in FIG. 2). This frozen body L2 ′ is contained in a desired amount contained in the sealing liquid L sealed in the liquid chamber 17 (1 wt% or more and 40 wt% or less, preferably 1 wt% with respect to the total weight of the sealing liquid L sealed in the liquid chamber 17). % Or more and 20% by weight or less) is a frozen mass formed by freezing the second liquid L2 by freezing. In FIG. 2, the number of frozen bodies L2 ′ is one, but a plurality of frozen bodies L2 ′ may be accommodated in a portion that becomes the main liquid chamber 14. The frozen body L2 ′ may be accommodated inside the vibration isolator main body 20 when the vibration isolator main body 20 is submerged in the pool P, or the vibration isolator main body 20 is submerged in the pool P. After that, it may be accommodated inside the vibration isolator body 20. In addition, the partition member 16 is appropriately swung in the pool P so that air does not remain in the restriction passage 24, the lower side of the membrane 16a, and the like, and then is assembled to the vibration isolator body 20.

Subsequently, the diaphragm 19 is introduced into the pool P, and the diaphragm 19 is fitted inside the opening of the other end of the first mounting member 11 in the first liquid L1, and the diaphragm 19 is assembled to the vibration isolator body 20. . At this time, the diaphragm 19 is appropriately swung within the pool P so that air does not remain on the lower side of the diaphragm rubber 19b, and then assembled to the vibration isolator body 20.
Thereafter, in the first liquid L1, the end on the other end side of the first mounting member 11 is bent radially inward over the entire circumference, and the first mounting member 11 and the diaphragm ring 19a are caulked and fixed.

Next, the assembled vibration isolator 10 is taken out from the pool P, the surface of the vibration isolator 10 is washed to wash away the first liquid L1 adhering to the surface of the vibration isolator 10, and into the liquid chamber 17. The stored frozen body L2 ′ is thawed. As a thawing method of the frozen body L2 ′, there are a method of thawing by heat treatment, and a method of leaving it for a certain period of time and naturally thawing it.
Thus, the vibration isolator 10 in which the sealed liquid L containing the first liquid L1 and the second liquid L2 is sealed in the liquid chamber 17 is completed.

  According to the manufacturing method of the vibration isolator 10 described above, the predetermined amount of the second liquid L2 in the sealed liquid L sealed in the liquid chamber 17 is frozen to form the frozen body L2 ′. After the assembly process, the above-mentioned frozen body L2 ′ housed in the main liquid chamber 14 is thawed so that a predetermined amount of the second liquid L2 is mixed with the first liquid L1 in the liquid chamber 17. The sealed liquid L containing the first liquid L1 and the second liquid L2 having incompatibility can be sealed in the liquid chamber 17 at a predetermined ratio. Thereby, the dispersion | variation in the content ratio of the 2nd liquid L2 in the sealing liquid L in the liquid chamber 17 can be suppressed, and the performance stability of the vibration isolator 10 can be improved.

Moreover, since the weight ratio of the second liquid L2 contained in the above-described sealed liquid L is smaller than the weight ratio of the first liquid L1 contained in the sealed liquid L, the frozen body L2 ′ of the second liquid L2 The volume becomes smaller. As a result, even if the internal volume of the portion for accommodating the frozen body L2 ′ is small, the frozen body L2 ′ can be easily accommodated, and the submerged assembly process can be easily performed.

Further, the above-described encapsulating 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. Since the liquid L1 contains ethylene glycol alone or ethylene glycol and propylene glycol, and the second liquid L2 contains silicone oil or fluorine oil, the damping effect of the vibration isolator 10 is not reduced. For this reason, the performance stability of the vibration isolator 10 can be improved while the damping function of the vibration isolator 10 is maintained.

  Further, since the submerged assembly process is performed in the first liquid L1 such as water-soluble ethylene glycol, the oil-based second liquid L2 (silicone oil or fluorine oil) does not adhere to the surface of the vibration isolator 10, thereby preventing the vibration. When the surface of the vibration device 10 is washed, it can be easily washed away with water.

[Second Embodiment]
Next, a second embodiment of a method for manufacturing the vibration isolator 10 having the above-described configuration will be described.

  First, as in the first embodiment described above, the vibration isolator main body creating step of creating the vibration isolator main body 20 by integrating the first mounting member 11, the second mounting member 12, and the elastic body 13, a circle A partition member creating step for creating the partition member 16 by forming the membrane 16a inside the annular partition member main body 16b, and a diaphragm creating step for creating the diaphragm 19 by forming the diaphragm rubber 19b inside the diaphragm ring 19a. Do each.

  Next, as shown in FIG. 3, the partition member 16 and the diaphragm 19 described above are assembled to the vibration isolator main body 20 in the first liquid L1 as in the first embodiment, and the liquid chamber 17 is assembled. A submerged assembly process for enclosing the first liquid L1 is performed. At this time, the frozen body L ′ in which the surface of the frozen body L2 ′ of the second liquid L2 is covered with the frozen body L1 ′ of the first liquid L1 is accommodated in the portion that becomes the main liquid chamber. The frozen body L ′ is obtained by freezing a desired amount of the second liquid L2 to be contained in the sealing liquid L sealed in the liquid chamber 17 by a freezing process to form a frozen body L2 ′ of the second liquid L2. This is a frozen mass created by forming a frozen body L1 of the first liquid L1 on the entire outer surface of L2 ′. Note that the freezing point of the second liquid L2 in the present embodiment is higher than the freezing point of the first liquid L1, as in the first embodiment described above.

According to the manufacturing method of the vibration isolator 10 described above, the frozen body L2 ′ of the second liquid L2 is dissolved before the frozen body L ′ is accommodated in the portion that becomes the main liquid chamber 14 of the vibration isolator body 20. Is suppressed. Thereby, the weight of the second liquid L2 accommodated in the liquid chamber 17 can be prevented from being reduced, and the ratio of the second liquid L2 in the sealed liquid L sealed in the liquid chamber 17 is more stable. The performance stability of the vibration isolator 10 can be further improved.

[Third Embodiment]
Next, a third embodiment of the method for manufacturing the vibration isolator 10 having the above-described configuration will be described.

  First, as in the first and second embodiments described above, the vibration isolator body 20 is created by integrating the first mounting member 11, the second mounting member 12, and the elastic body 13 to create the vibration isolator body 20. A process for forming a partition member 16 by forming a membrane 16a inside an annular partition member body 16b, and a diaphragm for forming a diaphragm 19 by forming a diaphragm rubber 19b inside the diaphragm ring 19a Each creation process is performed.

  Next, as shown in FIG. 4, an assembly process is performed in which the partition member 16 and the diaphragm 19 are assembled to the vibration isolator body 20 in the air. More specifically, first, the partition member 16 is fitted inside the first mounting member 11, and the partition member 16 is assembled to the vibration isolator main body 20. At this time, the frozen body L2 ′ of the second liquid L2 is accommodated in the portion that becomes the main liquid chamber 14 (above the membrane 16a in FIG. 4). Subsequently, the diaphragm 19 is fitted inside the opening at the other end of the first mounting member 11, and the diaphragm 19 is assembled to the vibration isolator body 20. Thereafter, the first mounting member 11 and the diaphragm ring 19a are caulked and fixed by bending the other end of the first mounting member 11 radially inward over the entire circumference.

Next, after the internal pressure of the liquid chamber 17 formed inside the first attachment member 11 is set to a negative pressure state, a liquid sealing step (vacuum injection step) for sealing the first liquid L1 in the liquid chamber 17 is performed. .
More specifically, the first mounting member 11 communicates with the liquid chamber 17 (the main liquid chamber 14, the sub liquid chamber 15, and the restriction passage 24), and evacuates the liquid chamber 17 and the first liquid L1. A common port portion 11a for performing both injections is provided.
Further, the sealing device 100 that performs the vacuum injection process includes a tank 101 filled with the first liquid L1, a supply tank 102 that has one end connected to the tank 101 and the other end connected to the common port portion 11a, A liquid supply valve 103 provided in the liquid tank 102, a vacuum pump 104 for evacuating the liquid chamber 17, and an intake air having one end connected to the vacuum pump 104 and the other end connected to the common port portion 11a. There is provided a flange 105 and an intake valve 106 provided on the intake manifold 105.

  In order to enclose the first liquid L1 in the liquid chamber 17 using the above-described enclosing device 100, first, with the liquid supply valve 103 closed, the intake valve 106 is opened and the vacuum pump 104 is operated. As a result, the gas in the liquid chamber 17 is sucked into the intake manifold 105 from the common port portion 11a, and is sucked out from the vacuum pump 104 through the intake manifold 105. As a result, the internal pressure of the liquid chamber 17 is reduced to a negative pressure state (vacuum state).

Subsequently, the intake valve 106 is closed and the operation of the vacuum pump 104 is stopped, and then the liquid supply valve 103 is opened. As a result, the first liquid L1 in the tank 101 reaches the common port portion 11a through the liquid supply tank 102 due to the internal pressure difference between the inside of the tank 101 and the liquid chamber 17, and from the common port portion 11a to the liquid chamber 17 Sucked into.
Thereafter, when the injection of the first liquid L1 into the liquid chamber 17 is completed, the liquid supply valve 103 is closed, and thereafter, the intake tub 105 and the liquid supply tub 102 are removed from the common port portion 11a and the common port portion 11a is closed. Then, the liquid chamber 17 is sealed.
Thus, the first liquid L1 is sealed in the liquid chamber 17.
And the frozen liquid L2 'accommodated in the liquid chamber 17 is thawed, so that the liquid L containing the first liquid L1 and the second liquid L2 is sealed in the liquid chamber 17, and the vibration isolator 10 Is completed.

  According to the manufacturing method of the vibration isolator 10 described above, by setting the internal pressure of the liquid chamber 17 to a negative pressure state, the first liquid L1 can easily flow into the liquid chamber 17, and the liquid chamber 17 is in the first liquid. Filled with L1. As a result, a predetermined amount of the first liquid L1 can be sealed in the liquid chamber 17, and variation in the content ratio of the first liquid L1 in the sealed liquid L in the liquid chamber 17 can be suppressed. The performance stability can be improved.

In addition, since the first liquid L1 having a vapor pressure lower than that of the second liquid L2 is injected by the above-described vacuum injection, the first liquid L1 is vaporized when the first liquid L1 is injected into the liquid chamber 17 in the negative pressure state. Is prevented. Thereby, the dispersion | variation in the content ratio of the 1st liquid L1 in the sealing liquid L in the liquid chamber 17 can be suppressed, and the performance stability of the vibration isolator 10 can be improved.

As mentioned above, although embodiment of the manufacturing method of the vibration isolator which concerns on this invention was described, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, 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 freezing point and vapor pressure than the first liquid L2, and may have the same or higher viscosity than the first liquid L2. . In the above-described embodiment, the weight ratio of the second liquid L2 contained in the sealing liquid L is smaller than the weight ratio of the first liquid L1, but the weight ratio of the second liquid L2 is changed to the first liquid. It is also possible to make it equal to or larger than the weight ratio of L1.

  Further, in the above-described embodiment, the frozen body L2 ′ (L ′) is accommodated in the portion that becomes the main liquid chamber 14 inside the vibration isolator main body 20 during the submerged assembly process. The frozen body L2 ′ (L ′) may be accommodated in any part that becomes the liquid chamber 17. For example, the frozen body L2 ′ (L ′) may be accommodated in the portion that becomes the secondary liquid chamber 15 (above the membrane 16a in FIGS. 2 and 3), or the frozen body L2 ′ in the portion that becomes the restriction passage 24. (L ′) may be accommodated.

Moreover, although the compression type is shown as the vibration isolator 10, the suspension type anti-vibration used so that the main liquid chamber 14 is positioned on the lower side in the vertical direction and the auxiliary liquid chamber 15 is positioned on the upper side in the vertical direction. It can also be applied to a vibration device.
Furthermore, the liquid contained in the encapsulating liquid L is not limited to two kinds of liquids (first liquid L1 and second liquid L2), and may be an encapsulating liquid L containing three or more kinds of liquids.

Moreover, the manufacturing method of the vibration isolator which concerns on this invention is not limited to the case where the engine mount of a vehicle is manufactured, It is also possible to apply to a vibration isolator other than an engine mount. For example, the present invention can be applied to a case where a generator mount mounted on a construction machine is manufactured, or can be applied to a case where a machine mount installed in a factory or the like is manufactured. .

  In the above-described embodiment, the diaphragm 19 (diaphragm ring 19 a) is caulked and fixed to the other end opening of the first mounting member 11. However, in the present invention, the diaphragm 19 is caulked and fixed to the first mounting member 11. For example, the diaphragm 19 may be fixed to the first mounting member 11 with a stopper or the like.

  In the embodiment described above, the restriction passage 24 is formed in the partition member 16, but in the present invention, the restriction passage 24 may be formed in addition to the partition member 16. For example, a restriction passage may be formed by grooving a part of the first mounting member 11, or a restriction passage may be formed by grooving a part of a caulking portion such as the diaphragm ring 19a.

In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

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 20 Vibration isolator main body 24 Restriction path L Filling liquid L1 First liquid L2 Second liquid L 'frozen body L2' frozen body

Claims (6)

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 for elastically connecting the first mounting member and the second mounting member;
A partition member that divides the liquid chamber in the first mounting member into a main liquid chamber on one side and a sub liquid chamber on the other side, the elastic body being a part of a partition;
A restriction passage is formed to communicate the main liquid chamber and the sub liquid chamber,
A method for 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,
In the liquid filling step of filling the first liquid in the liquid chamber, at least a frozen body formed by freezing the second liquid is accommodated in a portion that becomes the liquid chamber. A method of manufacturing a vibration device. In the manufacturing method of the vibration isolator of Claim 1,
The liquid sealing step includes assembling at least the partition member in the vibration isolator body formed by integrating the first mounting member, the second mounting member, and the elastic body in the first liquid. A method of manufacturing a vibration isolator, comprising the step of enclosing the first liquid in the liquid chamber. In the manufacturing method of the vibration isolator of Claim 1,
In the air, the liquid sealing step is performed by attaching at least the partition member to a vibration isolator body formed by integrating the first mounting member, the second mounting member, and the elastic body in the air, The method for manufacturing a vibration isolator is a step of bringing the internal pressure of the liquid into a negative pressure state and then injecting the first liquid into the liquid chamber. In the manufacturing method of the vibration isolator as described in any one of Claim 1 to 3,
A method for manufacturing a vibration isolator, wherein a weight ratio of the second liquid contained in the sealing liquid is smaller than a weight ratio of the first liquid contained in the sealing liquid. In the manufacturing method of the vibration isolator as described in any one of Claim 1 to 4,
The anti-vibration device according to claim 1, wherein the sealing liquid contains the first liquid in an amount of 60 wt% to 99.9 wt% and the second liquid in an amount of 0.1 wt% to 40 wt%. Production method. In the manufacturing method of the vibration isolator as described in any one of Claim 1 to 5,
The first liquid contains ethylene glycol alone or ethylene glycol and propylene glycol, and the second liquid contains silicone oil or fluorine oil.

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