JP2553356Y2 - Liquid filled mount - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid filled mount suitable as an engine mount for supporting an engine on a body frame, for example.

[0002]

2. Description of the Related Art Generally, in an automobile, an engine is supported on a body frame via an engine mount in order to prevent engine vibration from being directly transmitted to the body frame. Here, various types of engine vibrations are available, such as medium-frequency medium-frequency idling vibration during idling, large-amplitude low-frequency shock vibration due to road impact, and high-frequency micro-vibration during high-speed operation that causes booming noise. Therefore, there is a demand for an engine mount capable of effectively damping or absorbing these vibrations.

[0003] Therefore, as an engine mount capable of attenuating large-vibration low-frequency shock vibration and absorbing high-frequency microvibration during high-speed operation to prevent muffled noise, FIG.
(See Japanese Patent Publication No. Sho 63-23006). In this liquid-filled mount 6, a first liquid chamber 62 surrounded by a damper rubber 61 is partitioned from a first air chamber 64 via a sub-diaphragm 63,
A second liquid chamber 66 communicating with the first liquid chamber 62 via an orifice 65 is partitioned from a second air chamber 68 via a main diaphragm 67. Of the sub-diaphragm 63 having a low spring constant and absorbs high-frequency micro-vibration that causes booming noise.

[0004] Further, as an engine mount having a variable characteristic mechanism for improving characteristics against large vibration low frequency shock vibration and medium amplitude medium frequency idling vibration, FIG.
Also, a liquid-filled mount 7 shown in FIG. 15 and a liquid-filled mount 8 shown in FIG. 16 are conventionally known. Here, FIG.
The liquid filling mount 7 shown in FIG. 15 has a thin and long orifice 72 for the upper liquid chamber 71 to which the vibration load is directly input.
And a lower liquid chamber 74 through a thick and short orifice 73.
The liquid enclosing mount 8 shown in FIG. 16 has two orifices 8 of different diameters between a pair of upper and lower bags 81 and 82 made of rubber or the like in which liquid is sealed.
And orifices 83, 84.
Valves 86 and 87 that are controlled to be opened and closed by a controller 85
Is provided.

[0005]

By the way, in the liquid sealing mount 6 of the first conventional example shown in FIG.
Since the sub-diaphragm 63 that separates the liquid chamber 62 and the first air chamber 64 is made of rubber that is formed separately from the damper rubber 61, a vulcanizing mold dedicated to the sub-diaphragm 63 and a vulcanizing process thereof are required. Therefore, the manufacturing cost is increased, and the overall shape is complicated due to the consideration of a dedicated vulcanization mold.

The liquid-filled mount 7 of the second conventional example shown in FIGS. 14 and 15 has a large number of parts and a complicated structure, and the liquid-filled mount 8 shown in FIG. 16 has such a problem. In addition, a control unit 85 is required in addition to the above, and there is a problem that the manufacturing cost is increased.

Therefore, the present invention can reduce the manufacturing cost,
It is another object of the present invention to provide a liquid-filled mount with high anti-seismic performance that can effectively attenuate and absorb large-amplitude low-frequency shock vibrations to high-frequency microvibrations.

[0008]

SUMMARY OF THE INVENTION For this purpose, a liquid-filled mount according to the present invention is formed in an outer cylinder connected to a boss via a rubber leg, and vibration of the boss is directly input to the mount.
A first liquid chamber partitioned from the atmosphere through a sub-diaphragm that absorbs high-frequency micro-vibration, and communicates with the first liquid chamber through an orifice of an orifice plate; A liquid-filled mount including a second liquid chamber partitioned from the atmosphere via a main diaphragm that absorbs a change in volume, wherein the sub-diaphragm is formed in a cylindrical shape integrally formed with a rubber leg, and is provided on an outer surface of the sub-diaphragm. An air release window is formed in the opposed outer cylinder, and a cylindrical stopper is formed in the orifice plate so as to oppose the inner surface of the sub-diaphragm and regulate its amplitude to a predetermined width.

Another liquid-filled mount according to the present invention is formed in an outer cylinder connected to a boss via a rubber leg so that the vibration of the boss is directly input and the amplitude of the boss is small enough to absorb high-frequency fine vibration. A first liquid chamber partitioned from the atmosphere via a small first sub-diaphragm, and communicating with the first liquid chamber via a thin and long shock vibration orifice; and a volume of the first liquid chamber when a shock vibration is input. A second liquid chamber partitioned from the atmosphere through a main diaphragm that absorbs a change, and an idle vibration that communicates with the second liquid chamber through a thick and short idle vibration orifice and that is input to the first liquid chamber; And a third liquid chamber separated from the first liquid chamber via a second sub-diaphragm having a large amplitude for absorbing the liquid, wherein the first sub-diaphragm is formed integrally with a rubber leg. Pipe Together and then, the outer cylinder facing the outer surface of the first sub diaphragm forming the open air windows,
Means is to provide a cylindrical stopper which opposes the inner surface of the first sub-diaphragm and regulates its amplitude to a predetermined width.

[0010]

The liquid-filled mount of the present invention employing such means is used, for example, as an engine mount for supporting an automobile engine on a body frame, in which an outer cylinder is connected to the body frame and connected to the engine on a boss. Is done.
When shock vibration of large amplitude and low frequency is input to the boss due to a road impact or the like, the volume change of the first liquid chamber that cannot be absorbed by the sub-diaphragm is transmitted to the second liquid chamber via the orifice, and this volume change is The vibration is absorbed by the diaphragm, and at this time, the shock vibration is attenuated by the liquid column resonance action of the orifice.

Also, when driving a car at high speed, etc.
When the high-frequency fine vibration is input to the boss, the sub-diaphragm vibrates between the outer cylinder and the stopper and absorbs the high-frequency fine vibration, thereby preventing generation of muffled sound.

On the other hand, according to another liquid-filled mount of the present invention, when a large-amplitude low-frequency shock vibration is input to the boss due to a road impact or the like, the first sub-diaphragm and the second sub-diaphragm cannot completely absorb the shock vibration. The change in the volume of the liquid chamber is transmitted to the second liquid chamber through the orifice for shock vibration, and the change in volume is absorbed by the main diaphragm. At this time, the liquid column resonance action of the thin and long orifice for shock vibration is used. Shock vibration is greatly attenuated.

When idling vibration of medium amplitude and medium frequency is input to the boss during idling operation of the vehicle, a change in the volume of the first liquid chamber that cannot be completely absorbed by the first sub-diaphragm is caused by vibration of the second sub-diaphragm. The vibration is transmitted to the third liquid chamber and further transmitted to the second liquid chamber via the idle vibration orifice. At this time, the idle vibration is sufficiently attenuated by the liquid column resonance action of the thick and short idle vibration orifice. You.

Further, when high-frequency micro-vibration is input to the boss during a high-speed operation of an automobile, the first sub-diaphragm micro-vibrates and absorbs the high-frequency micro-vibration, thereby preventing generation of muffled sound. .

Since the sub-diaphragm and the first sub-diaphragm are formed integrally with the rubber leg for connecting the boss and the outer cylinder, a special vulcanizing mold is used in addition to the vulcanizing mold for the rubber leg. A mold and a dedicated vulcanization step are unnecessary, which reduces the manufacturing cost and simplifies the shape of the outer cylinder. In addition, since no external device such as a control unit is required, the manufacturing cost is reduced in this respect as well.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 1 shows a liquid-filled mount 1 according to a first embodiment of the present invention, in which a boss 11 is provided with a connecting bolt 11a connected to an engine (not shown).
A ring-shaped rubber leg 13 is vulcanized and bonded to the outer cylinder 12 fixed to a body frame (not shown). The rubber leg 13 is provided with the downward tapered surface 1 of the boss 11.
1b and the upwardly tapered surface 12a of the outer cylinder 12 are connected to form an umbrella. A thin cylindrical sub-diaphragm is provided below the rubber leg 13 along the inner surface of the cylindrical portion 12b of the outer cylinder 12. 13a is integrally formed.

2 (a) and 2 (b), the lower edge of the sub-diaphragm 13a, the outer peripheral portion of the orifice plate 14, and the outer peripheral portion of the main diaphragm 15 are vertically overlapped. Is fixed integrally to the lower part of the outer cylinder 12 in the closed state, thereby forming a first liquid chamber 16 in which liquid is enclosed by the sub-diaphragm 13 a above the orifice plate 14. A second liquid chamber 17 in which liquid is sealed by being partitioned from the atmosphere by a main diaphragm 15 is formed below. The main diaphragm 15 has a large contact area with the internal liquid, and is thin and easily deformed.

Here, a plurality of air release windows 12c are formed in the cylindrical portion 12b of the outer cylinder 12 facing the outer surface of the sub-diaphragm 13a along the circumferential direction. Also,
The orifice plate 14 has a sub-diaphragm 1
A cylindrical stopper 14b having a plurality of through-holes 14a protrudes from a peripheral surface of the sub-diaphragm 13a.
By regulating the amplitude of “a” to a predetermined width of about 0.01 to 0.03 mm, the sub-diaphragm 13 a can absorb high-frequency micro-vibration input to the first liquid chamber 16.

As shown in FIGS. 3A and 3B, the orifice plate 14 is formed by stacking an upper plate 14c having a stopper 14b projecting therewith and a lower plate 14e having an orifice groove 14d formed in an arc shape. Is composed of
One end of the orifice groove 14d communicates with the first liquid chamber 16 through the communication hole 14f of the upper plate 14c, and the other end communicates with the second liquid chamber 17 through the communication hole 14g of the lower plate 14e.
Is in communication with

In the liquid-filled mount 1 of the first embodiment configured as described above, the outer cylinder 12 is fixed to the body frame of the automobile, and the connecting bolt 11a of the boss 11 is connected to the engine to be used as an engine mount. Is done. In such a state of use, when shock vibration of large amplitude and low frequency is input to the boss 11 due to a road surface impact or the like, the rubber leg 13 bends and the volume of the first liquid chamber 16 changes. The sub-diaphragm 13a is slightly absorbed by the deflection of the sub-diaphragm 13a via the liquid in the first liquid chamber 16, but the volume change of the first liquid chamber 16 that cannot be completely absorbed by the sub-diaphragm 13a is caused by the orifice groove 14d in the orifice plate 14. Is transmitted to the liquid in the second liquid chamber 17 through the orifice. Then, the volume change transmitted to the liquid in the second liquid chamber 17 is absorbed by the main diaphragm 15, and at this time, the shock vibration is greatly attenuated by the liquid column resonance action of the orifice caused by the liquid passing through the orifice groove 14d. You.

Also, when driving a car at high speed, etc.,
When high-frequency micro-vibration is input to the boss 11, the sub-diaphragm 13a micro-vibrates between the cylindrical portion 12b of the outer cylinder 12 and the stopper 14b via the liquid in the first liquid chamber 16 to absorb the high-frequency micro-vibration. Therefore, the generation of the muffled sound is prevented.

FIG. 4 shows a liquid-filled mount 2 according to a second embodiment of the present invention, except for the orifice plate and the main diaphragm, which have the same configuration as the liquid-filled mount. Therefore, the same components are denoted by the same reference numerals, and detailed description is omitted. Here, the orifice plate 21 is configured by vertically stacking an upper plate 21a shown in FIG. 5A and a lower plate 21b shown in FIG. 5B, and a lower edge portion of the sub-diaphragm 13a and an upper plate 21a. The outer peripheral portion of the plate 21a and the outer peripheral portion of the lower plate 21b are integrally caulked and fixed to the lower portion of the outer cylinder 12 in a state of being vertically stacked, so that the outer peripheral portion is surrounded by the sub-diaphragm 13a above the orifice plate 21. A first liquid chamber 16 in which a liquid is sealed is formed.

Upper plate 21 of orifice plate 21
a has a cylindrical stopper 21d, which protrudes into the first liquid chamber 16 facing the inner surface of the sub-diaphragm 13a and has a plurality of through holes 21c on its peripheral surface, similarly to the stopper 14b.
The stopper 14b is provided with the sub-diaphragm 1
By regulating the amplitude of 3a to a predetermined width of about 0.01 to 0.03 mm, the sub-diaphragm 13a
It is designed to absorb high frequency micro-vibration input to the device. The upper plate 21a has a cup-shaped convex portion 21e bulging into the first liquid chamber 16 inside the stopper 21d.
Is formed, and a peripheral portion of the main diaphragm 22 arranged in the cup-shaped convex portion 21e is sandwiched between the upper plate 21a and the lower plate 21b, so that the main diaphragm 22 is formed in the cup-shaped convex portion 21e. Thus, a second liquid chamber 24 in which liquid is sealed is formed by partitioning from the air chamber 23 in the cup-shaped convex portion 21e. Further, a communication hole 21f that opens between the stopper 21d and the cup-shaped protrusion 21e is formed in the upper plate 21a. On the other hand, one end of the lower plate 21b of the orifice plate 21 is connected to the first liquid chamber 16 through the communication hole 21f of the upper plate 21a.
And a spiral orifice groove 21g whose other end communicates directly with the second liquid chamber 24 is formed.
The first liquid chamber 16 and the second liquid chamber 24 are connected to each other via g.

The liquid-filled mount 2 of the second embodiment configured as described above operates in the same manner as the liquid-filled mount 1, and when shock vibration is input to the boss 11,
The change in the volume of the first liquid chamber 16 due to the bending of the rubber leg 13 is caused by the second liquid chamber 2 through the orifice formed by the orifice groove 21g.
4 is transferred to the liquid in the main diaphragm 22.
The shock vibration is greatly attenuated by the liquid column resonance action of the orifice. When high-frequency micro-vibration is input to the boss 11, the first liquid chamber 1
6 through the liquid in the outer cylinder 12
And the high frequency micro-vibration is absorbed between the cylindrical portion 12b and the stopper 21d, thereby preventing the occurrence of muffled sound.

FIG. 6 shows a liquid filling mount 3 according to a third embodiment of the present invention, in which an outer cylinder 12 and an orifice plate 2 are provided.
1. Main diaphragm 22, air chamber 23, second liquid chamber 2
The parts other than 4 have the same configuration as the liquid-sealed mount 2. Therefore, the same components are denoted by the same reference numerals, and detailed description is omitted. Here, the liquid sealing mount 3 has an outer cylinder 32 to which a base plate 31 is flange-connected at a lower end, and the outer cylinder 32 has an upward tapered surface 32a similar to the upward tapered surface 12a, the cylindrical portion 12b, and the atmosphere opening window 12c. , A cylindrical portion 32b, and an atmosphere opening window 32c are formed. The sub-diaphragm 13a, the upper plate 33a and the lower plate 33b of the orifice plate 33 are vertically sandwiched between the outer cylinder 32 and the base plate 31, so that the orifice plate 3
Above 3, a first liquid chamber 16 is formed which is surrounded by a sub-diaphragm 13a and in which liquid is sealed.

Here, the upper plate 33a of the orifice plate 33 includes a through hole 21c, a stopper 21d, a cup-shaped convex portion 21e, a through hole 33c similar to the communication hole 21f, a stopper 33d, and a cup-shaped convex portion 33e of the upper plate 21a. ,
A communication hole 33f is provided. The lower plate 33b has an orifice groove 33g similar to the orifice groove 21g of the lower plate 21b.
It has a ring shape having a center hole 33h corresponding to 3e. On the other hand, an air release hole 31a is formed in the center of the base plate 31. And the lower plate 33
Since the main diaphragm 34 is sandwiched between the edge of the center hole 33h and the base plate 31, the second diaphragm 34 is separated from the air chamber 35 by the main diaphragm 34 in the cup-shaped convex portion 33e. A liquid chamber 36 is formed.

The liquid-filled mount 3 of the third embodiment thus constructed operates in the same manner as the liquid-filled mount 1 or 2, and the rubber leg 13 is bent by the shock vibration input to the boss 11, and The change in the volume of the first liquid chamber 16 is made through the orifice formed by the orifice groove 33g.
6 to the liquid in the main diaphragm 34
The shock vibration is greatly attenuated by the liquid column resonance action of the orifice. Further, the high-frequency minute vibration input to the boss 11 is applied to the first liquid chamber 16.
Is transmitted to the sub-diaphragm 13a via the liquid in the
This is absorbed by micro-vibration between the cylindrical portion 32b of the outer cylinder 32 and the stopper 33d, thus preventing the occurrence of muffled noise.

FIG. 7 shows a liquid-filled mount 4 according to a fourth embodiment of the present invention, in which a boss 41 having a connecting bolt 41a and an outer cylinder 42 have a ring-like shape for connecting them in an umbrella shape. The rubber leg 43 is vulcanized and bonded. A thin cylindrical first sub-diaphragm 43a is formed integrally with a lower portion of the rubber leg 43 along the inner surface of the outer cylinder 42. And the lower edge of the sub-diaphragm 43a,
An outer peripheral portion of an L-shaped cross section of a stopper ring 44, an outer peripheral portion of an orifice plate 45, an outer peripheral portion of a main diaphragm 46, and a base plate 47 having a connecting bolt 47a.
Is fixed integrally to the lower portion of the outer cylinder 42 in a state where the outer peripheral portion of the orifice plate 45
A first liquid chamber 48 enclosed by the sub-diaphragm 43a and filled with liquid is formed above the
A second liquid chamber 50 in which a liquid is sealed is formed below the lower part 5 by a main diaphragm 46 and separated from an air chamber 49. The main diaphragm 46 has little spring force and can smoothly follow a change in volume of the second liquid chamber 50.

Here, the outer cylinder 42 facing the outer surface of the first sub-diaphragm 43a is provided with a plurality of open air windows 42a along its circumferential direction. The stopper ring 44 has a plurality of through holes 44a on the peripheral surface facing the inner surface of the first sub-diaphragm 43a, and the peripheral surface of the stopper ring 44 reduces the amplitude of the first sub-diaphragm 43a by about ± 0.05 mm. By limiting the width to a predetermined width,
The sub-diaphragm 43a can absorb high-frequency micro-vibration input to the first liquid chamber 48.

The orifice plate 45 comprises a combination of an upper plate 45a, a middle plate 45b, and a lower plate 45c which are fitted and fixed to each other. The orifice plate 45 is thin and long between the upper plate 45a and the lower plate 45c. A shock vibration orifice 51 is formed in an arc shape, and a thick and short idle vibration orifice 52 is formed in an arc shape between the upper plate 45a, the middle plate 45b, and the lower plate 45c. A third liquid chamber 53 is formed between the upper plate 45a, the middle plate 45b, and the lower plate 45c. And a notch 45 communicating with one end of the orifice 51 for shock vibration.
d is formed in the upper plate 45a and a communication hole 45e communicating with the other end is formed in the lower plate 45c, so that the first liquid chamber 48 and the second liquid chamber 50 are thin and long orifices 51 for shock vibration. The communication is configured via
A communication hole 45f communicating with one end of the orifice 52 for idle vibration is formed in the lower plate 45c, and a notch 45g communicating with the other end is formed in the middle plate 45b. The third liquid chamber 53 is configured to communicate with the thick and short idle vibration orifice 52.

Here, as shown in FIGS. 8 to 10, a second sub-diaphragm 54 for partitioning the first liquid chamber 48 and the third liquid chamber 53 is provided between the upper plate 45a and the middle plate 45b. The upper plate 45a and the middle plate 45b which are sandwiched with a clearance of about 0.1 mm to ± 0.3 mm are provided with opening windows 45 respectively.
h, 45i are formed.

FIG. 11 shows a model of the liquid-filled mount 4 of the fourth embodiment configured as described above. FIG. 11 shows that when a large-amplitude low-frequency shock vibration of about ± 1 mm is input to the boss 41, the rubber is mounted. The leg 43 is bent and the first liquid chamber 48 is bent.
Changes in volume. Therefore, as shown in FIG.
The first sub-diaphragm 43a and the second sub-diaphragm 54 flex and slightly absorb the volume change of the first liquid chamber 48, and the volume change that cannot be completely absorbed by the first sub-diaphragm 43a and the second liquid chamber 50 via the shock vibration orifice 51. Is transmitted to the liquid.
Then, the main diaphragm 46 absorbs the volume change transmitted to the liquid in the second liquid chamber 50, and at this time, the liquid passes through the thin and long shock vibration orifice 51,
The shock vibration is greatly attenuated by the liquid column resonance action.

When idling vibration of medium amplitude and medium frequency of about ± 0.1 mm to ± 0.3 mm is input to the boss 41 during idling operation of the automobile, FIG.
As shown in (b), the first sub-diaphragm 43a flexes to slightly absorb the change in volume of the first liquid chamber 48. At this time, since the thin and long shock vibration orifice 51 has a large flow path resistance, the remaining volume change of the first liquid chamber 48 is not transmitted to the second liquid chamber 50 via the shock vibration orifice 51. Then, the remaining volume change is transmitted to the third liquid chamber 53 by vibrating the second sub-diaphragm 54, and further transmitted to the second liquid chamber 50 via the idle vibration orifice 52 which is thicker and shorter and has smaller flow path resistance. As a result, it is absorbed by the main diaphragm 46. At this time, the idle vibration is sufficiently attenuated by the liquid column resonance action of the thick and short idle vibration orifice 52.

Further, when a high-frequency micro-vibration of about ± 0.05 mm is input to the boss 41 at the time of high-speed driving of an automobile, etc., as shown in FIG. Although the liquid does not pass through the idle vibration orifice 52, the first sub-diaphragm 43a microvibrates with a low spring constant and absorbs the high frequency microvibration, thereby preventing the generation of muffled noise.

Here, the liquid-filled mount 1 of the first embodiment
Each of the liquid-sealed mounts 4 to 4 of the fourth embodiment includes the sub-diaphragm 13a or the first sub-diaphragm 4
Since the rubber legs 3a are integrally formed with the rubber legs 13, 43 for connecting the bosses 11, 41 and the outer cylinders 12, 32, 42, a dedicated vulcanization mold is used in addition to the vulcanization molds for the rubber legs 13, 43. A mold and a dedicated vulcanization step are unnecessary, so that the manufacturing cost is reduced and the shapes of the outer cylinders 12, 32, 42 can be simplified.

Further, in the liquid sealing mount 2 of the second embodiment and the liquid sealing mount 3 of the third embodiment, the second liquid chambers 24 and 36 partitioned by the main diaphragms 22 and 34 have the first liquid chambers 24 and 36, respectively.
Since it is arranged in the liquid chamber 16, the overall shape is compact.

Further, the liquid-filled mount 1 of the first embodiment
In each of the liquid filled mounts 4 of the fourth embodiment, since no external device such as a control unit is required at all, the manufacturing cost is reduced from this point as well.

[0038]

As described above, according to the liquid-filled mount of the present invention, when the outer cylinder is connected to the body frame as an engine mount and the engine is connected to the boss and used, a large amplitude is reduced due to road surface impact or the like. When the shock vibration of the frequency is input to the boss, the volume change of the first liquid chamber that cannot be completely absorbed by the sub-diaphragm is transmitted to the second liquid chamber via the orifice, and this volume change is absorbed by the main diaphragm. At this time, the shock vibration is attenuated by the liquid column resonance action of the orifice. In addition, when high-frequency micro-vibration is input to the boss, for example, during high-speed driving of an automobile, the sub-diaphragm micro-vibrates between the outer cylinder and the stopper to absorb the high-frequency micro-vibration. Therefore, not only can the shock vibration be sufficiently attenuated, but also the occurrence of muffled sound caused by the high-frequency micro-vibration can be prevented, and high seismic performance can be obtained.

On the other hand, according to the other liquid-filled mount of the present invention, when a large-amplitude low-frequency shock vibration is input to the boss due to a road impact or the like, the first sub-diaphragm and the second sub-diaphragm cannot completely absorb the shock vibration. The change in the volume of the liquid chamber is transmitted to the second liquid chamber through the orifice for shock vibration, and the change in volume is absorbed by the main diaphragm. At this time, the liquid column resonance action of the thin and long orifice for shock vibration is used. Shock vibration is greatly attenuated. Further, when idling vibration of medium amplitude and medium frequency is input to the boss during idling operation of the vehicle, a change in volume of the first liquid chamber that cannot be completely absorbed by the first sub-diaphragm is caused by vibration of the third liquid diaphragm via the second sub-diaphragm. The idle vibration is transmitted to the second liquid chamber via the idle vibration orifice, and the idle vibration is sufficiently attenuated by the liquid column resonance action of the thick and short idle vibration orifice. Furthermore, when high-frequency micro-vibration is input to the boss, for example, during high-speed driving of an automobile, the first sub-diaphragm micro-vibrates and absorbs the high-frequency micro-vibration. Therefore, generation of a muffled sound is prevented. Not only can shock vibration and idling vibration be sufficiently attenuated, but also the generation of muffled sound caused by high-frequency micro-vibration can be prevented, and high seismic performance can be obtained.

Since the sub-diaphragm and the first sub-diaphragm are formed integrally with the rubber leg for connecting the boss and the outer cylinder, a special vulcanization mold is used in addition to the vulcanization mold for the rubber leg. No mold or dedicated vulcanization process is required. Therefore,
The manufacturing cost can be reduced, and the shape of the outer cylinder can be simplified. In addition, since no external device such as a control unit is required, the manufacturing cost can be reduced from this point as well.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a liquid filled mount according to the present invention.

FIGS. 2A and 2B are cross-sectional views for explaining an assembling operation of an orifice plate in the first embodiment.

FIGS. 3A and 3B are perspective views of an upper plate and a lower plate in the first embodiment, respectively.

FIG. 4 is a sectional view showing a second embodiment of the liquid filled mount according to the present invention.

FIGS. 5A and 5B are perspective views of an orifice plate according to a second embodiment.

FIG. 6 is a sectional view showing a third embodiment of the liquid filled mount according to the present invention.

FIG. 7 is a sectional view showing a fourth embodiment of the liquid filled mount according to the present invention.

FIG. 8 is an enlarged sectional view of a second sub-diaphragm in the fourth embodiment.

FIG. 9 is a model diagram of a second sub-diaphragm in the fourth embodiment.

FIG. 10 is a partially exploded perspective view of a second sub-diaphragm in the fourth embodiment.

FIG. 11 is a model diagram showing a structure of a fourth embodiment;

FIGS. 12A, 12B, and 12C are model diagrams illustrating the operation of the fourth embodiment.

FIG. 13 is a cross-sectional view showing a first conventional example of a liquid-filled mount.

FIG. 14 is a sectional view showing a second conventional example of a liquid-filled mount.

FIG. 15 is an exploded perspective view showing a second conventional example of a liquid sealing mount.

FIG. 16 is a sectional view showing a third conventional example of a liquid-filled mount.

[Explanation of symbols]

 1, 2, 3, 4 ... Liquid-enclosed mount 11, 41 ... Boss 12, 32, 42 ... Outer cylinder 13, 43 ... Rubber leg 13a ... Sub-diaphragm 14, 21, 33, 45 ... Orifice Plates 15, 22, 34, 46 Main diaphragm 16, 48 First liquid chamber 17, 24, 36, 50 Second liquid chamber 23, 35, 49 Air chamber 31, 47 Base plate 43a ... First sub-diaphragm 44... Stopper ring 51... Shock vibration orifice 52... Idle vibration orifice 53... Third liquid chamber 54. 7 Liquid mount of second conventional example 8 Liquid mount of third conventional example

Continuation of the front page (56) References JP-A-62-9040 (JP, A) JP-A-1-146032 (JP, U) JP-B-63-23006 (JP, B2)

Claims (2)

(57) [Scope of request for utility model registration] 1. A boss (11) via a rubber leg (13).
Boss (11) formed in outer cylinder (12) connected to
The first liquid chamber (16), to which the vibration of the first liquid chamber is directly inputted and which is separated from the atmosphere through a sub-diaphragm (13a) that absorbs high-frequency fine vibration, and an orifice plate (14) provided in the first liquid chamber (16). A second liquid chamber (17) which is in communication with the orifice (14d) and is separated from the atmosphere via a main diaphragm (15) which absorbs a change in volume of the first liquid chamber (16) when a shock vibration is input. A liquid-filled mount (1) comprising: a sub-diaphragm (13);
a) is a cylindrical shape integrally formed with the rubber leg portion (13), and the outer cylinder (1) facing the outer surface of the sub-diaphragm (13a).
An air release window (12c) is formed in 2), and a sub-diaphragm (1) is formed in the orifice plate (14).
A liquid sealed mount characterized by forming a cylindrical stopper (14b) opposing the inner surface of 3a) and regulating the amplitude to a predetermined width. 2. A boss (41) via a rubber leg (43).
Boss (41) formed in outer cylinder (42) connected to
The first liquid chamber (48), which is directly input with the vibration of the first liquid chamber and is separated from the atmosphere via a first sub-diaphragm (43a) having a small amplitude for absorbing high-frequency micro-vibration, and the first liquid chamber (4).
8) through a thin and long shock vibration orifice (51), and the first liquid chamber (4) when a shock vibration is input.
8) Main diaphragm (46) that absorbs volume change
And a second liquid chamber (50) partitioned from the atmosphere through the second liquid chamber (50) through a thick and short idle vibrating orifice (52), and the first liquid chamber (48). )) Through a second sub-diaphragm (54) having a large amplitude that absorbs idle vibration input to the liquid filling mount (4) provided with the first liquid chamber (48) and a third liquid chamber (53) partitioned therefrom. ), Wherein the first sub-diaphragm (43)
a) is a cylindrical shape integrally formed with the rubber leg portion (43), and an outer cylinder (42) facing the outer surface of the first sub-diaphragm (43a) is formed with an air release window (42a). A liquid-filled mount provided with a cylindrical stopper (44) opposed to the inner surface of one sub-diaphragm (43a) to regulate the amplitude thereof to a predetermined width.