JP3948893B2 - Manufacturing method of liquid-sealed anti-vibration mount - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the production how the fluid-filled elastic mount for use in an engine mount or suspension bushing for automobiles.
[0002]
[Prior art]
The Applicant has previously have filed a manufacturing how the fluid-filled elastic mount as disclosed in JP-A-10-19083. An anti-vibration mount manufactured by this manufacturing method includes a bush in which an elastic body is integrally provided on the outer periphery of the inner cylinder and an outer cylinder into which the bush is press-fitted, and includes the elastic body and the outer cylinder. A pressure receiving chamber in which liquid is sealed and an equilibrium chamber in which liquid and gas are sealed are connected by an orifice. One of the inner cylinder and the outer cylinder is a vibration generating source, and the other is a vibration receiving portion. The gas in the equilibrium chamber is sealed in a negative pressure state before being connected to each other.
[0003]
In the above application content, the anti-vibration mount is manufactured as follows.
[0004]
First, a bushing in which an elastic body is integrally provided on the outer periphery of the inner cylindrical body is press-fitted halfway into the outer cylindrical body, and the pressure receiving chamber and the equilibrium chamber are exposed from the outer cylindrical body so as to accommodate a set amount of liquid. The anti-vibration mount is liquid-tightly held in the cylindrical outer wall member.
[0005]
Next, a liquid is injected into the pressure receiving chamber from an injection passage formed on one side of the outer wall member. This liquid also flows into the equilibrium chamber through the annular groove on the inner wall of the outer wall member, is discharged out of the outer wall member from a discharge passage formed on the other side of the outer wall member, and enters the pressure receiving chamber and the equilibrium chamber at the upper edge of the outer wall member. Fills liquid to a certain set level. That is, the liquid is allowed to overflow from the equilibrium chamber.
[0006]
Thereafter, air is allowed to flow from the injection passage side to the discharge passage side, and the liquid remaining in both passages is removed from the discharge passage.
[0007]
Thereafter, air in the pressure receiving chamber and the equilibrium chamber is sucked from the injection passage side to bring the pressure receiving chamber and the equilibrium chamber into a negative pressure state.
[0008]
Thereafter, the bush is pressed into the outer cylinder in an airtight manner.
[0009]
On the other hand, a manufacturing method as disclosed in JP 2000-46096 A is also known.
This manufacturing method follows the following procedure.
[0010]
First, the sealing member is press-fitted halfway into the cylindrical member to which the elastic body is fixed to form a liquid sealing chamber therebetween, and the liquid sealing chamber communicates with the outside of the sealing member via the communication path. Set the anti-vibration mount in the sealed state to the seal type.
[0011]
Next, the liquid filled chamber is evacuated through the communication path.
[0012]
Thereafter, liquid is injected into the liquid sealing chamber to seal the liquid sealing chamber.
[0013]
The evacuation and liquid injection are performed by switching one pipe connected to the sealing type sealing member to a vacuum pump and a liquid tank.
[0014]
[Problems to be solved by the invention]
However, in each of the above two publications, since the liquid to be injected adheres to the outer peripheral surface of the vibration-proof mount, an additional post-process for cleaning and removing this is required, increasing the number of manufacturing steps. Further, the liquid to be sealed is generally glycols or the like, and there is a problem of metal corrosion.
[0015]
Furthermore, since the anti-vibration mount is brought into contact with the outer wall member and the seal mold to reduce the pressure, if the outer shape of the anti-vibration mount is not constant due to dimensional tolerance or for some reason, the sealing performance is reduced and the liquid leaks. It will promote corrosion. This decrease in sealing performance results in a decrease in vibration isolation function.
[0016]
Further, in both publication examples, one passage (the injection passage in the former and the piping in the latter) is used for both the liquid injection passage and the decompression passage. Is not constant, and there is a problem that the anti-vibration function is lowered due to variations in the negative pressure range. In particular, in the former case, since the pressure is reduced after the liquid is injected, the injected liquid is sucked up together with the air at the time of the pressure reduction, and there is a problem that the liquid filling amount varies. This variation in the amount of liquid filled is also a factor governing the vibration isolation function .
[0017]
The present invention has been made in view of such points, and the object of the invention is to eliminate liquid leakage that causes corrosion, and to always keep the liquid filling amount and negative pressure state as set without variation. There is .
[0018]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is characterized in that liquid injection and decompression are performed by separate devices.
[0019]
Specifically, the present invention includes a bush in which an elastic body is integrally provided on the outer periphery of the inner cylinder, and an outer cylinder in which the bush is press-fitted, and a liquid is provided between the elastic body and the outer cylinder. The pressure receiving chamber filled with liquid and the equilibrium chamber filled with liquid and gas are connected by an orifice, and one of the inner cylinder and the outer cylinder is connected to the vibration generating source and the other is connected to the vibration receiving portion. prior to being, a gas of the equilibrium chamber assumes production how the fluid-filled elastic mount which is enclosed in a negative pressure state, was taken to solve the following means.
[0020]
In other words, the invention according to claim 1 is characterized in that the bushing is press-fitted halfway into the outer cylinder so as to form a storage space at least corresponding to a preset liquid storage capacity stored in the pressure receiving chamber and the equilibrium chamber. The anti-vibration mount in a semi-assembled state in which the pressure receiving chamber and the equilibrium chamber are exposed from the outer cylinder so that liquid can be injected is placed on a mounting table, and then liquid injection means is inserted into the pressure receiving chamber and the equilibrium chamber after injecting for a preset storage capacity to avoid overflow of the liquid and, by covering covering the said elastic mount lowers the vacuum chamber from above, the vibration damping mount is disposed in the vacuum chamber, then after the vacuum chamber upwardly lowers the arranged elevating plate by reducing the internal pressure decompression chamber inside the decompression chamber and the gas-tight seal by causing contact with the upper end of the vacuum chamber, accordingly, to the elevating plate downward Lowers the location has been pressed plates to press the bushing with piezoelectric inlet plate, characterized in that pressed into the outer cylinder.
[0021]
With the above configuration, in the first aspect of the invention, the liquid injection means is inserted into the pressure receiving chamber and the equilibrium chamber, and the liquid is directly injected by a set amount. At this time, the injected liquid does not overflow from the pressure receiving chamber and the equilibrium chamber and is accommodated with a margin. Therefore, the liquid does not adhere to the outer peripheral surface of the vibration isolating mount during the injection process, and the cleaning and removing process is unnecessary, thereby reducing the number of manufacturing steps, and there is no problem of metal corrosion due to liquid leakage.
[0022]
Furthermore, since the anti-vibration mount is housed in the decompression chamber during decompression, even if the external shape of the anti-vibration mount is not constant due to dimensional tolerances or for some reason, this has no effect on the sealing performance. And corrosion due to liquid leakage is not promoted. In addition, since the sealing performance is ensured, the anti-vibration function is not deteriorated.
[0023]
In addition, since liquid injection and pressure reduction are performed by separate devices, there is no fluctuation in liquid (gas) pressure due to liquid mixing into the passage during pressure reduction as in the conventional example, and the negative pressure range is always constant. As a result, the anti-vibration function is improved and the liquid filling amount is stabilized .
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0025]
9 and 10 show a fluid-filled elastic mount M that is more prepared to manufacture how according to the embodiment of the present invention. 9 and 10, reference numeral 1 denotes an inner cylinder, 2 denotes a rubber elastic body integrally joined to the outer periphery of the inner cylinder 1, and the bush 3 is constituted by the inner cylinder 1 and the rubber elastic body 2. Yes. The bush 3 is press-fitted into the outer cylinder 4, and the inner cylinder 1 and the outer cylinder 4 are connected by the rubber elastic body 2. An intermediate cylinder 5 as a reinforcing material is embedded in the outer peripheral side position of the rubber elastic body 2 near the outer cylinder 4. Between the rubber elastic body 2 and the outer cylinder 4, a pressure receiving chamber 6 (lower side in FIGS. 9 and 10) in which the liquid L is enclosed, and an equilibrium chamber 7 (in which the liquid L and the gas G are enclosed) ( 9 and FIG. 10 are connected to each other by two right and left orifices 8. In FIG. 9, the liquid L and the gas G are omitted.
[0026]
The inner cylinder 1 is placed in the outer cylinder 4 so that the cylinder axis X is positioned above the cylinder axis Y of the outer cylinder 4 and extends in parallel with the cylinder axis Y in an unloaded state. On the other hand, it is supported by the rubber elastic body 2. The intermediate cylinder 5 has a rebound receiving portion 5a formed by bending the upper predetermined range concavely toward the inner cylindrical body 1, while the lower predetermined range is notched to form a notch window portion. 5b is formed.
[0027]
The rubber elastic body 2 has two left and right main spring portions 2a that extend from the inner cylindrical body 1 in a C shape and elastically support the inner cylindrical body 1 with respect to the outer cylindrical body 4 to perform a vibration isolating function. And an input side stopper portion 2b that protrudes from the inner cylinder 1 into the pressure receiving chamber 6 below, and a rebound stopper portion 2c that covers the upper peripheral surface of the inner cylinder 1 with a predetermined thickness. .
[0028]
Between the main spring portion 2a and both sides of the rebound receiving portion 5a of the intermediate cylinder 5, one through space 9 is formed penetrating in a direction parallel to the cylinder axes X and Y.
[0029]
The input side stopper portion 2b prevents further downward relative displacement of the inner cylinder 1 by the projecting end hitting the inner peripheral surface of the outer cylinder 4 when a large amplitude vibration or impact force is input downward. It is supposed to be. The rebound stopper portion 2c contacts the inner circumferential surface of the rebound receiving portion 5a of the intermediate cylinder 5 when the inner cylinder 1 rebounds upward during input of the large amplitude vibration or the like. Further upward relative displacement is prevented. The rebound stopper portion 2c is configured such that, when the main spring portion 2a is in an unloaded state, the front end surface of the through-hole 9 is in contact with the inner peripheral surface of the rebound receiving portion 5a of the intermediate cylinder 5 in a non-adhesive state. It has been in the state.
[0030]
The pressure receiving chamber 6 is defined by being surrounded by the main spring portion 2 a and the inner peripheral surface of the outer cylindrical body 4 at a position corresponding to the cutout window portion 5 b of the intermediate cylindrical body 5. Therefore, when vibration is input in the vertical direction, the inner cylinder 1 is relatively displaced in the vertical direction, and the main spring portion 2a is elastically deformed, thereby acting as a pressure fluctuation of the liquid L in the pressure receiving chamber 6. On the other hand, the equilibrium chamber 7 is defined by a member having a relatively high rigidity between the outer surface of the rebound receiving portion 5a of the intermediate cylinder 5 and the peripheral surface of the outer cylinder 4, and the volume thereof is not changed. Yes. A small amount of liquid L and air G as compressed gas occupying the upper space are sealed in the equilibrium chamber 7 so as to cover the opening of the orifice 8 on the equilibrium chamber 7 side.
[0031]
When the anti-vibration mount M configured as described above is used as, for example, an engine mount, the inner cylinder 1 is arranged by a bolt inserted in the inner cylinder 1 so that the vertical direction is the direction of action of the engine's own weight. Is connected to the engine side as a vibration generating source, and the outer cylinder 4 is connected to the vehicle body side as a vibration receiving portion via a bracket or the like. As a result of this mounting, the inner cylinder 1 is in a so-called 1G state in which the engine's own weight is loaded. As a result of the loading, the main spring portion 2a is elastically deformed and the inner cylinder 1 is relatively displaced downward. As a result, the rebound stopper portion. 2c, the tip surface is separated downward from the inner peripheral surface of the rebound receiving portion 5a as indicated by the phantom line in FIG. 10, and the cylinder axis X of the inner cylinder 1 is arranged coaxially with or near the cylinder axis Y of the outer cylinder 4 It will be placed in the position.
[0032]
When a downward vibration is input from the engine side to the inner cylinder 1, the main spring portion 2 a bends downward and presses the liquid L in the pressure receiving chamber 6. As a result, the liquid L passes through each orifice 8 and the equilibrium chamber 7. Flow to the side. In the equilibrium chamber 7, the air G is compressed by the flowing liquid L, and the liquid L flows again through the orifices 8 toward the pressure receiving chamber 6 by the compression restoring force. The input vibration is attenuated by the liquid column resonance between the pressure receiving chamber 6 and the equilibrium chamber 7 through each orifice 8.
[0033]
Next, the configuration of a manufacturing apparatus for manufacturing the vibration-proof mount M will be described with reference to FIGS.
[0034]
In FIG. 1, reference numeral 11 denotes a machine frame. A mounting table 12 is mounted on a base frame 11 a of the machine frame 11, and a vibration-proof mount M in a semi-assembled state is mounted on the mounting table 12. Yes. Here, as shown in FIG. 2, the semi-assembled state means that an internal space is formed so as to at least correspond to a preset liquid storage amount stored in the pressure receiving chamber 6 and the equilibrium chamber 7 . The bush 3 in which the rubber elastic body 2 is integrally joined to the outer periphery of the cylindrical body 1 is pressed into the outer cylindrical body 4 halfway, and the pressure receiving chamber 6 and the equilibrium chamber 7 are exposed from the outer cylindrical body 4 so that the liquid L can be injected. Say. That is, even if a predetermined amount of the liquid L is injected, the liquid L does not overflow from the pressure receiving chamber 6 and the equilibrium chamber 7.
[0035]
The mounting table 12 is not directly mounted on the base frame 11a of the machine frame 11, but is indirectly mounted via a cantilever strain type load cell 13 as a weight measuring means. When four support shafts 14 (only two appear in FIG. 2) are erected on the base side frame 11a at a distance from the bottom surface of the mounting table 12, and an excessive load is applied to the mounting table 12. The load cell 13 is prevented from being damaged by acting as a limit stopper. A protective cover 15 for preventing the injection liquid L from scattering is disposed around the mounting table 12, and a discharge pipe 16 for discharging the injected injection liquid L from the protective cover 15 to the outside on the bottom surface thereof. Is connected.
[0036]
One liquid injection nozzle 17 as a liquid injection means is disposed on both sides of the mounting table 12. The liquid injection nozzles 17 and the pressure receiving chamber 6 of the anti-vibration mount M on the mounting table 12 are in equilibrium with each other. The liquid L is injected by being inserted into the chamber 7, and the amount of liquid injected into the pressure receiving chamber 6 and the equilibrium chamber 7 is measured in real time by the load cell 13.
[0037]
At the uppermost end of the machine casing 11, a lower end of a ball screw 18 extending in the vertical direction is rotatably supported by the fixed frame 11b. A pulley 19 is connected to a servo motor (not shown) at the lower end of the ball screw 18. Driven by a belt 20, the rotational torque of the servo motor is transmitted to the pulley 19 via the timing belt 20, and the ball screw 18 is rotated about its axis. The upper end of the ball screw 18 is connected to the center of the first elevating plate 21 via a ball nut 22, and the upper end of a guide rod 23 extending in the vertical direction is connected to both sides of the first elevating plate 21. The lower ends of the guide rods 23 are fitted into cylindrical holders 24 provided on both sides of the fixed frame 11b so as to be movable in the vertical direction, and a second elevating plate 25 is connected and supported at the lower ends thereof.
[0038]
At the center of the lower surface of the second elevating plate 25, a press-in pusher 26 composed of a fluid pressure cylinder as press-in means is installed above a decompression chamber 35, which will be described later, and can be moved back and forth. A press-fitting plate 27 is attached to the lower end of the piston rod 26b extending in the direction, and the bushing 3 is pressed from above by the press-fitting plate 27 by the advancing operation by the extension operation of the press-fitting pusher 26 so as to press fit into the outer cylinder 4. Yes. A pair of dampers 28 are installed on the lower surface of the second elevating plate 25 so as to sandwich the press-fit pusher 26, and the lower end of the rod 28 a of each damper 28 presses the third elevating plate 29. Hits the upper surface of the press-fitting plate 27 and supports the third elevating plate 29. A through hole 29 a is formed in the center of the third elevating plate 29, and the piston rod 26 b of the press fitting pusher 26 penetrates the through hole 29 a and the press fitting plate 27 is disposed below the third elevating plate 29. The periphery of the cylinder body 26a of the press-fit pusher 26 is covered with a bellows-like seal cover 30 so that it does not leak from the through-hole 29a during pressure reduction described later.
[0039]
On both sides of the second elevating plate 25, guide rods 31 extending in the vertical direction are arranged so as to be movable in the vertical direction on the cylindrical holder 32. Each guide rod 31 is arranged on the third elevating plate 29. It is inserted into a cylindrical holder 33 provided on both sides so as to be movable in the vertical direction, and a fourth elevating plate 34 is connected and supported at its lower end.
[0040]
A cylindrical decompression chamber 35 is installed on the fourth elevating plate 34 so as to be movable up and down above the mounting table 12 by the elevating operation of the fourth elevating plate 34, and the anti-vibration mount M on the mounting table 12 in the lowered state. In the decompression chamber 35 is decompressed. The entire peripheral wall 35a of the decompression chamber 35 is made of, for example, a transparent acrylic plate or the like so that the anti-vibration mount M accommodated therein can be seen from the outside during decompression. The transparent portion does not need to be provided on the entire peripheral wall 35a, and may be a part of the transparent portion as long as the inside is visible. A sealing O-ring 36 is attached to the upper and lower opening edges of the decompression chamber 35. During decompression, the lower O-ring 36 is crimped to the mounting table 12, and the upper O-ring 36 is crimped to the third lifting plate 29. By doing so, the inside of the decompression chamber 35 is kept airtight. A decompression hose 37 connected to a negative pressure source (not shown) is connected to the lower end of the decompression chamber 35.
[0041]
Next, a procedure for manufacturing the vibration isolating mount M by the manufacturing apparatus configured as described above will be described.
[0042]
(1) A bush 3 having a rubber elastic body 2 integrally joined to the outer periphery of the inner cylinder 1 is prepared. This bush 3 is manufactured as follows.
[0043]
The inner cylinder 1, the intermediate cylinder 5 in which the rebound receiving part 5 a and the notch window part 5 b are formed, and the core for forming the through space 9 are inserted into the molding mold of the rubber elastic body 2. At this time, an adhesive is applied to the outer peripheral surface of the inner cylinder 1 and the inner and outer peripheral surfaces excluding the inner peripheral surface of the rebound receiving portion 5a of the intermediate cylinder 5, while the inner peripheral surface of the rebound receiving portion 5a is adhesive. Leave it uncoated without applying. Then, vulcanized molding is performed by putting unvulcanized rubber in the molding mold. As a result, the end surface of the rebound stopper portion 2c is in contact with the inner peripheral surface of the rebound receiving portion 5a, but is in a non-adhered state. On the other hand, the intermediate cylinder body 5 and the inner cylinder body 1 in other parts The rubber elastic body 3 in a vulcanized and bonded state is molded.
[0044]
(2) The bush 3 integrally formed as described above is formed in the outer cylinder 4 in the middle so as to form a storage space at least corresponding to a preset liquid storage capacity stored in the pressure receiving chamber 6 and the equilibrium chamber 7. The anti-vibration mount M in a semi-assembled state in which the pressure receiving chamber 6 and the equilibration chamber 7 are exposed from the outer cylindrical body 4 so that the liquid L can be injected is shown in FIGS. M is mounted on the mounting table 12.
[0045]
(3) As shown in FIG. 4, the liquid injection nozzle 17 is advanced and inserted into the pressure receiving chamber 6 and the equilibrium chamber 7 of the anti-vibration mount M, and the liquid L is injected in a preset amount. At this time, the injection amount of the liquid L is measured by the load cell 13, and the injection is stopped when the set amount is reached. In this state, the liquid L injected into the pressure receiving chamber 6 and the equilibrium chamber 7 does not overflow.
[0046]
Accordingly, it is possible to prevent the liquid L from adhering to the outer peripheral surface of the vibration-proof mount M during the injection process, and it is not necessary to go through the cleaning and removing process, so that the number of manufacturing steps can be reduced by that amount, and the liquid leakage The problem of metal corrosion can be solved.
[0047]
Moreover, since the injection amount of the liquid L is injected while actually measuring the load cell 13 in real time, the injection can be performed with high accuracy.
[0048]
(4) As shown in FIG. 5, after the liquid injection nozzle 17 is retracted from the pressure receiving chamber 6 and the equilibrium chamber 7 of the vibration isolation mount M, the ball screw 18 is rotated around the axis by the activation of the servo motor, and the first The elevating plate 21 is lowered. As a result, the second elevating plate 25, the third elevating plate 29, and the fourth elevating plate 34 are lowered integrally, and the decompression chamber 35 is covered with the anti-vibration mount M on the mounting table 12, thereby preventing the vibration. The mount M is accommodated in the decompression chamber 35 and disposed.
[0049]
(5) When the decompression chamber 35 contacts the mounting table 12, the fourth elevating plate 34 does not descend thereafter, but the second elevating plate 25 and the third elevating plate 29 are integrated as shown in FIG. The third elevating plate 29 comes into contact with the upper O-ring 36 of the decompression chamber 35 and stops descending. At this time, the shock is absorbed by the damper 28, reaches a certain position by position control of the servo motor, and the servo motor stops starting. The decompression chamber 35 is pressed against the mounting table 12 by the third elevating plate 29 and the inside thereof is kept airtight. From this state, the negative pressure source is operated to evacuate the decompression chamber 35 to a predetermined negative pressure state. Reduce pressure until
[0050]
As described above, since the anti-vibration mount M is accommodated in the decompression chamber 35 and the decompression chamber 35 is decompressed, the outer shape of the anti-vibration mount is not constant due to dimensional tolerance or some cause. However, this does not affect the sealing performance at all, and the promotion of corrosion due to liquid leakage can be prevented.
[0051]
In addition, since liquid injection and pressure reduction are performed by separate devices, there is no fluctuation in liquid (gas) pressure due to liquid L mixing into the passage during pressure reduction as in the conventional example, and the negative pressure range is always maintained. The anti-vibration function can be improved, and the liquid filling amount can be stabilized.
[0052]
Furthermore, since the anti-vibration mount M can be seen from the outside through the transparent peripheral wall 35a of the decompression chamber 35, a situation in which reliability is impaired by monitoring whether or not the injection amount of the liquid L is performed as set. Can be reliably avoided.
[0053]
(6) As shown in FIG. 7, the press-in pusher 26 is extended to advance downward, and the bush 3 exposed upward from the outer cylindrical body 4 is pressed by the press-in plate 27 in the half-assembled state. Press fit into the cylinder 4.
[0054]
(7) After opening the decompression chamber 35 to the atmosphere, as shown in FIG. 8, the servo motor is reversely activated, and the first elevating plate 21, the second elevating plate 25, the third elevating plate 29, and the fourth elevating plate 34 is raised. As a result, the decompression chamber 35 rises and moves away from the mounting table 12. The anti-vibration mount M that has been assembled is removed from the mounting table 12, and a series of operations is completed.
[0055]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the liquid injection means is inserted into the pressure receiving chamber and the equilibrium chamber and the liquid is directly injected by a preset amount so as not to overflow , The adhesion to the outer peripheral surface of the vibration-proof mount can be prevented, thereby reducing the number of manufacturing steps and preventing the corrosion of the metal. In addition, since the anti-vibration mount is housed in the decompression chamber and decompressed, even if the external shape of the anti-vibration mount is not constant due to dimensional tolerances or for some reason, it is reliably sealed to prevent corrosion due to liquid leakage can do. In addition, since liquid injection and pressure reduction are performed by separate devices, there is no fluctuation in liquid (gas) pressure due to liquid mixing into the passage during pressure reduction as in the conventional example, and a constant negative pressure state is secured. The vibration isolating function can be improved and the liquid filling amount can be stabilized .
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a manufacturing apparatus to which a manufacturing method of a liquid filled type vibration isolating mount according to an embodiment of the present invention is applied .
FIG. 2 is an enlarged view showing a state in which the anti-vibration mount in a semi-assembled state is mounted on the mounting table.
FIG. 3 is a mounting process diagram in the manufacturing method of the liquid-filled vibration-proof mount according to the embodiment of the present invention.
FIG. 4 is a liquid injection process diagram in the manufacturing method of the liquid-filled vibration-proof mount according to the embodiment of the present invention.
FIG. 5 is a depressurization chamber lowering process diagram in the manufacturing method of the liquid-filled vibration-proof mount according to the embodiment of the present invention.
FIG. 6 is a pressure reduction process diagram in the manufacturing method of the liquid-filled vibration-proof mount according to the embodiment of the present invention.
FIG. 7 is a press-fitting process diagram in the manufacturing method of the liquid-filled vibration-proof mount according to the embodiment of the present invention.
FIG. 8 is a decompression chamber ascent process diagram after assembly in the method for manufacturing a liquid filled type vibration isolating mount according to the embodiment of the present invention.
FIG. 9 is a longitudinal sectional view of the vibration-proof mount.
FIG. 10 is a cross-sectional view of the anti-vibration mount.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inner cylinder 2 Elastic body 3 Bush 4 Outer cylinder 6 Pressure receiving chamber 7 Equilibrium chamber 8 Orifice 12 Mounting stand 13 Load cell (weight measuring means)
17 Liquid injection nozzle (liquid injection means)
26 Press-in pusher (press-in means)
35 Decompression chamber 35a Perimeter wall G Gas L Liquid M Anti-vibration mount

Claims (1)

A bushing in which an elastic body is integrally provided on the outer periphery of the inner cylindrical body, and an outer cylindrical body into which the bushing is press-fitted, and a pressure receiving chamber in which liquid is sealed between the elastic body and the outer cylindrical body; The equilibrium chamber filled with gas is communicated with an orifice, and one of the inner cylinder and the outer cylinder is connected to the vibration generating source, and the other is connected to the vibration receiving portion. A method for manufacturing a liquid-filled vibration-proof mount in which a gas in a room is sealed in a negative pressure state,
The bushing is press-fitted halfway into the outer cylinder so as to form a storage space at least corresponding to a preset liquid storage capacity stored in the pressure receiving chamber and the equilibrium chamber, and the pressure receiving chamber and the equilibrium chamber store liquid. Place the anti-vibration mount in a semi-assembled state exposed from the outer cylinder so as to allow injection, and place it on the mounting table.
Next, by inserting a liquid injection means into the pressure receiving chamber and the equilibrium chamber to inject a predetermined amount so as not to overflow the liquid, the pressure reducing chamber is lowered from above and covered with the vibration isolation mount. , the vibration damping mount is disposed in the vacuum chamber,
Thereafter, the elevating plate disposed above the decompression chamber is lowered and brought into contact with the upper end of the decompression chamber to keep the decompression chamber inside airtight and decompress the decompression chamber.
After accordingly, the manufacturing method of the liquid-filled elastic mount which is characterized in that pressed into the outer cylinder and lowers the press-fit plate disposed above the elevating plate downward to press the bushing with piezoelectric input plate.

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