JP2001027278A - Fluid-filled vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain a stable damping characteristic by an orifice by positioning a partition body of a fluid-filled vibration control device while simplifying the constitution of the partition body. SOLUTION: The outer peripheral part of a partition body 7 forming an orifice 18 is shaped to form one side or two sides of cross section of the orifice 18. While simplifying the constitution of the partition body 7, groove parts are provided at joint parts between the partition body 7 and other orifice forming members 4, 25, and both members are positioned to maintain a requested orifice cross section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid filled type vibration damping device mainly used for supporting a vibration generator such as an automobile engine.

[0002]

2. Description of the Related Art As a liquid filling type vibration damping device such as an engine mount for supporting a vibration of a vibration generating body such as an automobile engine so as not to be transmitted to a vehicle body side, a liquid filling type vibration damping device of a conventional example 1 as shown in FIG. A liquid filling type vibration damping device of Conventional Example 2 in which a rubber-like elastic film 107 is vulcanized and bonded to a center hole of a partition body as shown in FIG. 17 is known.

That is, in each of the prior art examples 1 and 2, the vibration isolating base 101 of the apparatus main body 100 and the diaphragm 1
02 is provided between the liquid chamber 103 and the main liquid chamber and the sub liquid chamber.
Orifice 1 communicating the main liquid chamber and the sub liquid chamber on the outer peripheral side of 4
The vibration damping function is exhibited by the liquid flow effect of the two liquid chambers by the orifice 105, and the vibration insulating function is exerted by the vibration-proof base 101.

[0004]

In order to obtain stable product characteristics in a liquid-filled type vibration damping device, the volume of the orifice having a vibration damping function, in particular, the cross-sectional area thereof is set to a desired size. 16 and FIG. 17, the outer periphery of the partition body 104 constitutes three sides of the upper surface, the inner peripheral surface and the bottom surface of the orifice. Particularly, since the liquid chamber rubber portion guides the remaining one side of the orifice, the partition body 104 is formed by bending a single metal plate by press molding or deep drawing. However, there is a problem that the molding process for forming the three sides of the orifice is complicated.

[0005] If the configuration of the partition is simplified so that press or deep drawing can be easily performed to overcome this difficulty, there is a possibility that a problem may occur in the positioning of the partition 104 in the radial direction and the height direction. is there. In particular, as in Conventional Examples 1 and 2, usually, when the lower end portion of the partition body is bent outward in the radial direction and the outer end portion is caulked and fixed to the mounting bracket 108, the partition body has a radius There is a possibility of deviation in the direction and the height direction.

As described above, when the partition body is displaced in the radial direction and the height direction, the orifice using the partition body cannot be set to a desired sectional area, and there is a problem that stable product characteristics cannot be obtained. Was.

[0007]

Means for Solving the Problems The present inventors have paid attention to the above-mentioned problems, and on the premise of simplifying the structure of the partition body, what kind of member should form the orifice, In such a case, the inventor of the present invention has intensively studied how the positioning is performed to obtain a desired orifice cross-sectional area.

Therefore, as a result of intensive studies on measures for simplifying the configuration of the partition, as a result, instead of forming the three sides of the orifice with the partition as in the prior art, two or more of them are used.
If one side or one side is composed of a partition, and the other side is composed of another orifice forming member, for example, a liquid chamber rubber portion, a vibration isolating base or a diaphragm fitting, the shape of the partition is simplified accordingly. I found that.

For example, the outer peripheral portion of the partition is bent into an L-shaped cross section to support the inner peripheral surface and the bottom surface of the orifice, or the outer peripheral portion of the partition is formed as an inner peripheral surface of the orifice as a substantially vertical wall, and disposed below the lower surface. The outer peripheral metal of the diaphragm to be used as the orifice bottom surface, and the outer peripheral lower surface of the partition body is used as the orifice upper surface. The form used as a surface and a bottom surface is mentioned. When the outer peripheral metal of the diaphragm is used as the orifice forming member, the upper half of the inner peripheral surface of the orifice may be supported by the outer peripheral wall of the partition, and the lower half may be supported by a part of the diaphragm metal.

[0010] In any of the embodiments, since the partition member only bears two or one side of the orifice wall surface,
The shape is also simplified, and the change in the shape of the diaphragm fitting is reduced.

In this case, the cross-sectional shape of the orifice formed on the outer peripheral portion of the partition is not particularly limited, but the orifice inner peripheral surface is formed in view of simplification of the configuration of the partition or the relationship with positioning means described later. It is desirable that the portion to be formed has a shape close to a vertical wall, and as long as it is formed, any of a triangular cross-section and a substantially rectangular cross-section may be used.

For example, a structure in which a lower portion of a liquid chamber rubber portion forming an outer peripheral surface of an orifice is expanded to form an orifice having a substantially triangular cross section, or a portion above a cylindrical liquid chamber rubber portion forming an outer peripheral surface of the orifice is formed. Any configuration may be adopted in which a horizontal flat portion is formed around the vibration isolating base to form an orifice upper surface, and the orifice having a substantially rectangular section in cross-section is formed alone or in cooperation with a diaphragm fitting.

The partition may be formed by bending a single sheet of metal and forming it, or may be formed by casting a product such as aluminum.
The former can simplify press working or deep drawing.

In the case where the partition body of the above embodiment is adopted, the partition body is configured to support two sides or one side of the orifice.
Positioning in the liquid chamber is an important factor. Then, the following positioning means were taken.

When the cross section of the outer peripheral portion of the partition body is formed in an L shape to form the inner peripheral surface and the bottom surface of the orifice, the upper end of the outer peripheral portion of the partition body extends in the insertion direction (upward), while the upper extension portion is provided. An annular groove is formed in the peripheral surface of the vibration isolating base facing the above, and a method of press-fitting or inserting the upper extending portion of the partition body into this groove (hereinafter, may be simply referred to as “press-fitting or the like”) is adopted. In this case, even when the outer peripheral portion of the downwardly extending portion that extends radially outward to form the bottom surface of the orifice below the partition body is caulked and fixed to the mounting bracket,
The positioning accuracy of the partition body in the radial direction and the height direction is improved, and a desired orifice cross section can be obtained.

When the inner peripheral surface of the orifice is constituted by the outer peripheral portion of the partition and the bottom surface of the orifice is constituted by a diaphragm, the upper end of the partition constituting the inner peripheral surface of the orifice is extended in the insertion direction (upward). By adopting a configuration in which an annular groove is formed on the liquid-chamber-side peripheral surface of the vibration-proof base opposed to the upper extending portion and the upper extending portion of the partition body is press-fitted into this groove, the bottom surface of the orifice is formed by a diaphragm. The metal fitting is caulked to the mounting metal and positioned, and at the same time, the partition can be easily positioned by the groove.

In this case, it is preferable that the rubber member is interposed at the joint surface between the bottom surface of the orifice and the partition body, and that the rubber member is formed with an annular groove at the joint surface between the two members. If a configuration is adopted in which the lower end of the partition body is press-fitted, positioning of both can be performed well.

The upper surface of the orifice is constituted by the lower surface of the partition,
When the inner peripheral surface and the bottom surface of the orifice are formed by the diaphragm fitting, the outer peripheral end of the partition body is brought into contact with the peripheral wall of the liquid chamber rubber portion, and the outer peripheral surface of the vibration-proof base located above the liquid chamber rubber portion is removed. The upper end of the partition body is brought into contact with the flat part, and
If a configuration is adopted in which the upper end of the U-shaped diaphragm fitting is pressed against the lower surface of the partition, the positioning of the partition and the positioning of the diaphragm fitting can be performed with high accuracy.

In this case, if the outer peripheral end of the partition is bent upward to form a rib-shaped peripheral wall, it can be used as a guide for press-fitting along the liquid chamber rubber portion or in that the rigidity of the partition can be secured. It is suitable. When such a rib-shaped peripheral wall is formed, if the upper end thereof is press-fitted into a groove formed on the liquid-chamber-side peripheral surface of the vibration-proof base, the positioning of the partition body is further improved.

When the upper half of the inner peripheral surface of the orifice is carried by the outer peripheral wall of the partition, and the lower half is carried by a part of the diaphragm fitting, the outer peripheral portion of the partition is extended upward as a substantially vertical wall. An annular groove portion for positioning the partition body is formed on the liquid chamber side peripheral surface of the vibration base, and an upper extending portion of the partition body is press-fitted into the groove portion, and the diaphragm fitting is bent and formed into an L-shaped cross section.
If a configuration is employed in which the upper end is elastically contacted with the lower surface of the outer peripheral portion of the partition via a rubber member, positioning of the partition can be favorably performed.

In this case, if a configuration is adopted in which an annular groove is formed in the seal rubber member interposed between the joining surface between the upper end of the orifice and the lower surface of the partition and the upper end of the orifice fitting is press-fitted into this groove, etc. In addition, the positioning of the diaphragm fitting can be performed with high accuracy.

In any of the above embodiments, the radial and height dimensions of the portion into which the partition body is press-fitted, the radial direction and the height direction of the groove formed on the entire circumference of the vibration-isolating base on which the partition is press-fitted and the like. It is possible to increase the degree of freedom of the characteristic tuning by changing the dimension of. In addition, it is desirable that the vibration insulating property of the vibration isolating base does not affect the orifice. Therefore, when the liquid chamber side peripheral surface of the vibration isolating base is the upper surface of the orifice, the upper end of the mounting bracket is bent inward. It is preferable that the bent portion is buried in the vibration-isolating base to secure the rubber rigidity of the orifice portion.

The shape of the central region of the partition is not particularly limited. For example, when it is necessary to reduce the dynamic spring constant in a high frequency range (particularly, an engine noise range) in a vibration isolator. Alternatively, a configuration in which an elastic film is provided in the central region of the partition body can be adopted.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a liquid-filled type vibration damping device showing a first embodiment, FIG. 2 is a longitudinal sectional view of another part of the device, and FIG.

As shown in the drawing, the liquid-filled type vibration damping device 1 includes an upper mounting bracket 2 mounted on a vibration generator such as an engine, a lower mounting bracket 3 mounted on a vehicle body,
An anti-vibration base 4 made of a rubber-like elastic body that connects these two mounting brackets 2 and 3 to each other, and a liquid-absorbing base 4 disposed on the lower metal fitting side 3 facing the anti-vibration base 4. The diaphragm 6 constituting the chamber 5 and the liquid chamber 5 are composed of a main liquid chamber 5a and a sub liquid chamber 5
b.

The upper mounting member 2 is formed in a flat plate shape, and a mounting bolt 9 projecting upward and supporting an engine or the like is fixed to the center thereof. The upper surface of the upper mounting member 2 absorbs a large displacement. A screw 11 for positioning the base end of a stopper (not shown) is fixed.

The lower mounting member 3 comprises a bottomed cylindrical portion 13 having an outer flange 13a expanded at the upper end, and a cylindrical body portion 14 having a lower end fastened to the outer flange 13a from the outside. Have been.

At the bottom of the bottomed cylindrical portion 13, a fixing bolt 15 for fixing to the vehicle body side is fixed. Cylindrical body 14
The lower end flange 14a is expanded at the lower end, and the lower end flange 14a and the outer flange 13
The outer peripheral portions of the diaphragm 6 and the partition 7 are sandwiched between the diaphragm 6 and the a. A fastening portion 16 is provided at the end of the lower end flange 14a, and the outer flange 13a of the bottomed cylindrical portion 13 is inserted thereinto and caulked and fastened so as to surround from the outside. It has a shape. The upper end of the cylindrical body 14 is bent inward,
The inner end of the bent portion 17 extends to the inside of the radial width of the orifice 18 and is embedded in the vibration-proof base 4.

The anti-vibration base 4 has a rubber-like elastic body formed in an umbrella shape to constitute a main rubber portion, and is vulcanized to the cylindrical body 14 of the upper mounting fitting 2 and the lower mounting fitting 3. At the same time as being bonded, it also surrounds the upper bent portion 17 of the cylindrical body 14. Anti-vibration base 4 below upper bent portion 17
, That is, a flat portion 1 in which the lower peripheral surface of the vibration isolation base 4 is horizontal
An annular groove 20 is formed in the flat portion 19 for press-fitting the upper end of a partition body 7 described later. The main liquid chamber 5a and the sub liquid chamber 5 are located outside the groove 20 in the radial direction.
b and the upper surface of the orifice communicating with b. Further, the rubber-like elastic body of the vibration-proof base 4 is extended in a thin film shape to the lower end of the inner wall of the cylindrical body 14 continuously from the outer peripheral edge of the flat portion 19 to constitute the liquid chamber rubber portion 22.

The partition body 7 is formed by bending a single disk-shaped metal plate by deep drawing or press molding, and has a disk-shaped center for partitioning the main liquid chamber and the sub liquid chamber. Flat plate part 23
And, after the outer periphery is bent and rises upward,
A cylindrical orifice inner peripheral portion 24 that is folded back and extends downward and has a vertical wall surface, and a flange portion 26 that is bent radially outward from the lower end of the inner peripheral portion 24 to form the orifice bottom surface. I have.

The outer end of the flange portion 26 of the partition 7 is fixed by caulking to the fastening portion 16 of the lower mounting member 3. The upper end folded portion 27 of the orifice inner peripheral portion 24 is in a state of extending above the upper surface of the orifice 18,
This portion is pressed into the groove 20 of the vibration-proof base 4. Openings 28 and 29 are formed in the orifice inner peripheral portion 24 so as to open to the main liquid chamber 5a and the sub liquid chamber 5b, respectively. A part of the liquid chamber rubber portion 22 is integrally formed with a partition wall rubber portion 30 that blocks between the openings 28 and 29.

The orifice bottom surface is defined by the flange portion 26 of the partition member 7, the orifice inner peripheral surface is defined by the orifice inner peripheral portion 24, and the orifice outer peripheral surface is defined by the liquid chamber rubber portion 22.
Further, an orifice upper surface is formed by the lower peripheral flat surface portion 19 of the vibration isolating base 4, and these are formed in a liquid-tight state as an orifice 18 having a rectangular cross section which communicates the main liquid chamber 5a and the sub liquid chamber 5b.

The diaphragm 6 has a flexible rubber-like elastic film 6a, and an annular diaphragm fitting 25 is provided around its outer periphery.
The inner end of the (outer peripheral metal fitting) is embedded and integrated, and the metal fitting 25 is placed on the outer flange 13 a of the bottomed cylindrical portion 13.
The inner end of the diaphragm fitting 25 is bent upward,
The bent portion 32 is also surrounded by the rubber member 33, and the bent portion 32 is fitted inside the orifice inner peripheral portion 24 of the partition 7. An air chamber 38 is formed between the diaphragm 6 and the bottomed cylindrical portion 13.

To assemble the vibration isolator 1, the lower end opening of the cylindrical body 14 is set upward in the liquid tank, the partition 7 is inserted, and the extension 27 at the tip end in the insertion direction is inserted.
Is pressed into the groove 20 of the vibration-proof base 4. Next, the diaphragm 6 is mounted, these are taken out to the atmosphere, the remaining liquid is adjusted, and the fastening portion 16 is caulked and fixed to complete the assembly.

In this assembled state, since the partition body 7 is in a state of being press-fitted into the groove 20 of the vibration-proof base 4,
The positioning in the radial direction and the height direction can be performed accurately. As a result, the orifice 18 surrounded by the partition body 7, the vibration isolating base 4, and the liquid chamber rubber portion 22 has a desired sectional area. , And good vibration damping characteristics can be obtained.

[Second Embodiment] FIG. 4 is a longitudinal sectional view showing a second embodiment. In this embodiment, when it is necessary to reduce the dynamic spring constant in a high frequency range (especially in an engine noise range), an opening 34 is formed in the central flat plate portion 23 of the partition 7 and a rubber-like material is formed so as to cover this opening. The elastic film 35 is vulcanized and bonded to the partition 7. By the action of the elastic film 35, the dynamic spring constant in a high frequency range (particularly, an engine noise range) can be effectively reduced. Other configurations and operations are the same as those of the first embodiment.

[Third Embodiment] FIG. 5 is a longitudinal sectional view showing a third embodiment, and FIG. 6 is a longitudinal sectional view showing another part of the third embodiment. In this embodiment, as the orifice forming member, a flat portion 19 on the lower peripheral surface of the vibration isolation base 4, a liquid chamber rubber portion 22, the partition 7, and a diaphragm fitting 25 are formed.

The partition member 7 is formed by bending a single disk-shaped metal plate by pressing or deep drawing, and includes a disk-shaped central flat plate portion 23 and an upper portion extending from the outer peripheral portion thereof. And the orifice inner peripheral portion 24 which bears the upper half of the inner peripheral surface of the orifice. The upper end of the inner peripheral portion 24 of the orifice extends above the flat portion 19 on the lower peripheral surface of the vibration-isolating base 4, and the upper extension 24 a is formed in the annular groove 20 formed in the vibration-isolating base 4. It has been press-fitted. The main liquid chamber 5 is provided in the inner peripheral portion 24 of the orifice.
An opening 28 communicating between a and the orifice 18 is formed to penetrate therethrough.

On the other hand, the inner end of the diaphragm fitting 25
The rubber film 3 is formed to be bent upward and the periphery of the bent portion 32 is formed.
3 and the upper end of the bent portion 32 is in elastic contact with the lower surface (diaphragm side) of the central flat plate portion 23 of the partition 7 via the rubber film 33. The bent portion 32 has an opening 29 communicating the orifice 18 and the sub-liquid chamber 5b.
Are formed through. The diaphragm fitting 25 constitutes a bottom surface of the orifice, and its outer end is fixed to the fastening portion 16 of the lower mounting fitting 3 by caulking.
Other configurations are the same as those of the first embodiment.

In the assembling of the above-mentioned vibration isolator, as in the first embodiment, the lower end opening of the cylindrical body 14 is set upward in the liquid tank, and the partition 7 is inserted. After press-fitting the inner peripheral portion 24 of the orifice at the tip in the insertion direction into the groove portion 20 of the vibration isolating base 4, the diaphragm 6 is attached, these are taken out into the atmosphere, the residual liquid is adjusted, and the fastening portion 16 is adjusted.
Caulking and fixing.

In this case, since the configuration of the partition 7 is a simple cup shape in which the orifice inner peripheral portion 24 rises up on the outer peripheral portion of the central flat plate portion 23, it has a simple configuration and its molding is easy. Alternatively, the partition body 7 can be positioned simply by press-fitting the upper end extending portion 24a of the orifice inner peripheral portion 24 into the groove portion 20 of the vibration isolating base 4, and the orifice 18 having a desired cross section can be obtained.
Has the advantage that it can be easily set.

[Fourth Embodiment] FIG. 7 is a longitudinal sectional view showing a fourth embodiment. In this embodiment, an opening 34 is formed in the central flat plate portion 23 of the partition 7 and the opening 34 is formed. 34
The elastic film 35 is vulcanized and bonded so as to cover the dynamic spring constant of the high frequency region (particularly, engine noise region). Other configurations and operations are the same as in the third embodiment.

[Fifth Embodiment] FIG. 8 is a longitudinal sectional view showing a fifth embodiment. In this embodiment, an opening 34 is formed in the central flat plate portion 23 of the partition 7 and the opening 34 is formed. , The elastic film 35 is sandwiched between the upper end of the bent portion 32 of the diaphragm fitting 25 and the partition 7 so that the dynamic spring constant in a high frequency range (in particular, an engine noise range) can be effectively reduced. Like that. Other configurations and operations are the same as in the third embodiment.

[Sixth Embodiment] FIG. 9 is a longitudinal sectional view showing a sixth embodiment, and FIG. 10 is a longitudinal sectional view showing another part in the same manner. In this embodiment, the orifice 18 having a rectangular cross section has a liquid chamber rubber portion 22 that bears the outer peripheral surface of the orifice,
It is composed of a partition member 7 that carries the upper surface of the orifice, and a diaphragm fitting 25 that carries the inner peripheral surface and the bottom surface of the orifice.

The partition member 7 is formed by bending a single disk-shaped metal plate by pressing or deep drawing, and stands up from a disk-shaped central flat plate portion 23 and an outer peripheral portion thereof. It is formed in a cup shape from the annular peripheral wall 24. The outer peripheral wall 24 of the partition 7 is pressed into the inner peripheral wall of the liquid chamber rubber portion 22, and the upper end thereof is in contact with the flat portion 19 on the lower peripheral surface of the vibration-proof base 4.

The diaphragm fitting 25 has a ring-shaped bottom plate 25a whose outer end is caulked and fixed to the fastening portion 16 of the mounting fitting 3, and a cylindrical orifice inner periphery 32 which is bent upward from the inner end and rises. And is composed of
The upper end of the orifice inner peripheral portion 32 is press-fitted into an annular groove portion 41 of a rubber member 40 which is vulcanized and bonded to the lower surface of the central flat plate portion 23 of the partition body 7 in a ring shape. Thereby, the joining surface between the partition 7 and the diaphragm fitting 25 is sealed,
The space surrounded by these and the liquid chamber rubber portion 22 functions as the orifice 18.

An opening 28 communicating with the main liquid chamber 5a is formed through the outer peripheral side of the central flat plate portion 23 of the partition body 7, while an opening communicating with the sub liquid chamber 5b is formed in the inner peripheral part 32 of the diaphragm fitting 25. 29, these openings 28, 2
The partition wall 43 for preventing the short circuit 9 from being short-circuited.
Is integrally formed continuously with a rubber member 40 that is vulcanized and bonded to the lower surface of the rubber member 40. Other configurations are the same as those of the first embodiment.

To assemble the vibration isolator 1, the lower end opening of the cylindrical body 14 is set upward in the liquid tank, and the partition 7 is pressed into the liquid chamber rubber 22 along the liquid chamber rubber 22. The extending portion at the tip in the insertion direction is fixed to the peripheral flat portion 19 of the vibration isolation base 4.
After that, the diaphragm 6 was mounted, the upper end of the inner peripheral portion 32 was press-fitted or inserted into the groove 41 of the annular rubber member 40 of the partition 7, and these were taken out into the atmosphere and the residual liquid was adjusted. After that, the fastening portion 16 is fixed by caulking and assembled.

In this case, the outer peripheral wall 24 is pressed against the liquid chamber rubber portion 22 in spite of the simple shape that the outer peripheral edge of the central flat plate portion 23 is raised. And the upper end thereof is the flat surface 1 of the vibration-proof base 4.
9, the partitioning member 7 is positioned in the radial direction and the height direction. In addition, since the outer peripheral wall 24 of the partition 7 functions as a rib and rigidity can be secured, a change in the orifice cross-sectional area due to vibration or the like can be prevented. Further, the diaphragm fitting 25 also includes a bottom plate portion 25a and a cylindrical inner peripheral wall 32 rising from the inner end thereof.
Since it is a simple shape consisting of the following, forming by drawing or pressing can be easily performed.

[Seventh Embodiment] FIG. 11 is a longitudinal sectional view showing a seventh embodiment. In this embodiment, an opening 34 is formed in the central flat plate portion 23 of the partition 7 and the opening 34 is formed. The elastic film 35 is vulcanized and adhered so as to cover the dynamic spring constant in a high frequency range (in particular, an engine noise range). This elastic film 35 is used for the partition 7
Is vulcanized and formed integrally with the rubber member 40 and the partition wall 43 on the lower surface of. Other configurations and operations are the same as in the sixth embodiment.

[Eighth Embodiment] FIG. 12 is a longitudinal sectional view showing an eighth embodiment, and FIG. 13 is a longitudinal sectional view showing another part in the same manner. This embodiment is basically similar to the sixth embodiment in that an orifice 18 having a rectangular cross section has a liquid chamber rubber portion 22 that carries the outer peripheral surface of the orifice, a partition 7 that carries the upper surface of the orifice, and an orifice inside the orifice. Although it is constituted by the diaphragm metal fittings 25 which bear the peripheral surface and the bottom surface, the structure of the positioning means of the partition 7 and the joint of the partition 7 and the diaphragm metal fitting 25 are different from those of the sixth embodiment. I have.

More specifically, the partition 7 is formed in a cup shape, as in the sixth embodiment.
Is press-fitted into the inner peripheral wall of the liquid chamber rubber portion 22, and the upper end extending portion 24 a is an annular groove 20 formed on the peripheral surface of the vibration-proof base 4 and at the boundary with the liquid chamber rubber portion 22. It is positioned by press-fitting. Further, an annular groove 45 is formed on the outer peripheral lower surface of the central flat plate portion 23 of the partition body 7,
A rubber member 40 in the form of a thin film is vulcanized and bonded along the groove 45 to form a groove corresponding to the groove 45 of the partition 7.

On the other hand, the configuration of the diaphragm fitting 25 is also the sixth
But the orifice inner periphery 32
The upper end of the annular groove 40 of the lower rubber member 40 of the partition 7
a. Thereby, the joint surface between the partition body 7 and the diaphragm fitting 25 is sealed, and the space surrounded by these and the liquid chamber rubber portion 22 functions as the orifice 18. Other configurations are the same as in the sixth embodiment.

The vibration isolator 1 is assembled in such a manner that the lower end opening of the cylindrical body 14 is set upward in the liquid tank, and the partition 7 is pressed into the liquid chamber rubber section 22 along with the liquid chamber rubber section 22. The extending portion at the tip in the insertion direction is fixed to the peripheral flat portion 19 of the vibration isolation base 4.
After the diaphragm 6 is mounted, the upper end of the inner peripheral portion 32 is brought into contact with the groove 40a of the rubber member 40 of the partition 7, and these are taken out into the atmosphere and the residual liquid is adjusted. Then, the fastening portion 16 is assembled by caulking.

In this case, although the shape of the partition member 7 is a simple shape in which the outer peripheral edge of the central flat plate portion is raised, the outer peripheral wall 24 is pressed against the liquid chamber rubber portion 22. In addition, the upper end thereof is press-fitted into the peripheral groove 20 of the vibration isolating base 4, and the positioning of the partition body 7 in the radial direction and the height direction can be performed better than in the sixth embodiment. Other functions and effects are the same as those of the sixth embodiment.

[Ninth Embodiment] FIG. 14 is a longitudinal sectional view showing a ninth embodiment.
An opening 34 is formed in the central flat plate portion 23 of the partition body 7, and an elastic film 35 is vulcanized and bonded so as to cover the opening 34, as in the embodiment of FIG. Is effectively reduced. The elastic film 35 is provided on the rubber member 40 on the lower surface of the partition 7.
And vulcanization molding integrally with the partition wall 43. Other configurations and operations are the same as in the eighth embodiment.

[Tenth Embodiment] FIG. 15 is a longitudinal sectional view showing a tenth embodiment. In this embodiment,
The orifice 18 includes a liquid chamber rubber portion 22 that serves as an outer peripheral surface of the orifice, a flat peripheral surface portion 19 of the vibration isolating base 4 that carries the upper surface of the orifice, the partition 7 that carries the inner peripheral surface of the orifice, and a diaphragm fitting 25 that carries the lower surface of the orifice. The difference from the first embodiment is that the orifice fitting 25 serves as the orifice bottom surface, and that the partition 7 has no lower end flange, and the vertical peripheral wall 24 of the partition 7 has The only difference is that the lower end is in contact with the upper surface of the diaphragm fitting 25, and the other configuration is the same as that of the first embodiment.

Specifically, the partition member 7 is formed by bending a single disk-shaped metal plate by deep drawing or press molding, and includes a central flat plate portion 23 and an outer peripheral portion thereof. After being bent and rising upward, it is folded back and extends downward to form a vertical orifice inner peripheral portion 2 of a cylindrical orifice.
The lower end of the inner peripheral portion 24 is in elastic contact with the rubber film 33 in which the diaphragm fitting 25 is embedded.

In this case, the partition member 7 is pressed into the groove of the vibration-proof base 4 and the lower end is in elastic contact with the diaphragm fitting 25. Positioning can be performed accurately.

[0060]

As is apparent from the above description, according to the present invention, the structure of the partition body forming the orifice is simplified to facilitate the molding of the partition body, and at the same time, the partition body and other orifice forming members can be formed easily. Since a configuration in which a groove is provided in the joint portion and the two are joined is adopted, there is an advantage that the positioning of the partition member and other orifice forming members can be easily performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a liquid filled type vibration damping device showing a first embodiment according to the present invention.

FIG. 2 is a longitudinal sectional view of another part of the device.

FIG. 3 is a sectional view of a main part of the same.

FIG. 4 is a longitudinal sectional view showing a second embodiment.

FIG. 5 is a longitudinal sectional view showing a third embodiment.

FIG. 6 is a longitudinal sectional view showing another part of the same.

FIG. 7 is a longitudinal sectional view showing a fourth embodiment.

FIG. 8 is a longitudinal sectional view showing a fifth embodiment.

FIG. 9 is a longitudinal sectional view showing a sixth embodiment.

FIG. 10 is a vertical cross-sectional view showing another part of the same.

FIG. 11 is a longitudinal sectional view showing a seventh embodiment.

FIG. 12 is a longitudinal sectional view showing an eighth embodiment.

FIG. 13 is a vertical sectional view showing another part of the same.

FIG. 14 is a longitudinal sectional view showing a ninth embodiment;

FIG. 15 is a longitudinal sectional view showing a tenth embodiment.

FIG. 16 is a cross-sectional view of a liquid-filled type vibration damping device of Conventional Example 1.

FIG. 17 is a sectional view of a liquid-filled type vibration damping device of Conventional Example 2.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 liquid-filled vibration isolator 2 upper mounting bracket 3 lower mounting bracket 4 vibration-proof base 5 liquid chamber 5 a main liquid chamber 5 b sub-liquid chamber 6 diaphragm 7 partitioning body 18 orifice 19 flat part 20 groove part 22 liquid chamber rubber part 23 flat plate Part 24 Inner peripheral part (peripheral wall) 25 Diaphragm fitting 32 Inner peripheral part (bent part) 35 Rubber-like elastic film 40 Rubber member

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsutomu Hashimoto 1-17-18 Edobori, Nishi-ku, Osaka-shi, Osaka F-term in Toyo Tire & Rubber Co., Ltd. 3D035 CA05 3J047 AA03 AA15 AB01 CA04 DA01 DA02 FA02

Claims (8)

[Claims] The liquid chamber in the apparatus main body is divided into a main liquid chamber and a sub liquid chamber.
A liquid filling type vibration isolator in which an orifice is formed between the partition body and a surrounding liquid chamber rubber portion, wherein an outer peripheral portion of the partition body has a cross section of the orifice. An annular groove portion for positioning is formed in one of the partition body and the other orifice forming member at a joint between the partition body and another orifice forming member, and is configured to carry one side or two sides of the shape, On the other hand, a liquid filling type vibration damping device having a tip portion which is press-fitted or inserted into the groove portion. 2. A partition which divides a liquid chamber formed between an anti-vibration base of the apparatus main body and a diaphragm into a main liquid chamber and a sub-liquid chamber is provided, and the partition and a liquid chamber around the partition are provided. An orifice is formed between a rubber portion and a liquid-filled type vibration damping device, wherein an outer peripheral portion of the partition body is bent and formed into an L-shaped cross section to support an inner peripheral surface and a bottom surface of the orifice. The upper end of the inner peripheral portion of the orifice of the partition that bears the inner peripheral surface of the orifice is extended upward, and the upwardly extending portion is formed in the annular groove for positioning the partition formed on the liquid chamber side peripheral surface of the vibration isolation base. A press-fitted or inserted liquid filled type vibration damping device. 3. A partition is provided which divides a liquid chamber formed between the vibration-isolating base of the apparatus main body and the diaphragm into a main liquid chamber and a sub-liquid chamber, and the partition and the surrounding liquid chamber. An orifice is formed between a rubber part and a liquid-filled type vibration damping device, wherein an outer peripheral part of the partition body is a substantially vertical wall so as to bear an inner peripheral surface of the orifice, and an outer peripheral metal fitting of the diaphragm serves as an orifice bottom surface. The upper end of the outer peripheral portion of the partition body is extended upward, and an annular groove portion for positioning the partition member is formed on the liquid chamber side peripheral surface of the vibration isolating base opposed to the upwardly extending portion. A liquid-filled vibration isolator in which the upper part of the partition is press-fitted or inserted. 4. A partition which divides a liquid chamber formed between an anti-vibration base of the apparatus main body and the diaphragm into a main liquid chamber and a sub liquid chamber is provided, and the partition and a liquid chamber around the partition are provided. An orifice is formed between a rubber part and a liquid-filled type vibration damping device, wherein a lower surface of an outer peripheral portion of the partition is an upper surface of the orifice, and an outer peripheral metal fitting of a diaphragm disposed below the orifice has an inner peripheral surface of the orifice and An outer peripheral end of the partition body is formed to be bent upward, and a peripheral wall thereof is pressed against a peripheral wall of the liquid chamber rubber portion to bear a bottom surface, and a peripheral wall of the partition body is pressed against a liquid chamber side peripheral surface of the vibration isolation base. A liquid-filled type vibration damping device in which the upper end of the partition body is in contact with the formed flat portion, and the upper end of the outer peripheral metal fitting of the diaphragm is pressed against the lower surface of the partition body via a rubber member. 5. A partition which divides a liquid chamber formed between a vibration-isolating substrate and a diaphragm of an apparatus main body into a main liquid chamber and a sub-liquid chamber is provided, and the partition and a liquid chamber around the partition are provided. An orifice is formed between a rubber part and a liquid-filled type vibration damping device, wherein a lower surface of an outer peripheral portion of the partition is an upper surface of the orifice, and an outer peripheral metal fitting of a diaphragm disposed below the orifice has an inner peripheral surface of the orifice and The partition has an L-shaped cross section so as to support the bottom surface, and an outer peripheral end of the partition body is bent upward and a peripheral wall thereof is pressed against a peripheral wall of the liquid chamber rubber portion. The upper end of the partition is press-fitted or inserted into an annular groove for positioning the partition formed on the surface, and the upper end of the outer peripheral metal fitting of the diaphragm is pressed against the lower surface of the partition via a rubber member. Shaking device. 6. A partition which divides a liquid chamber formed between an anti-vibration base of the apparatus main body and a diaphragm into a main liquid chamber and a sub liquid chamber is provided, and the partition and a liquid chamber around the partition are provided. An orifice is formed between a rubber portion and a liquid-filled type vibration damping device, wherein an outer peripheral portion of the partition body is formed on a substantially vertical wall that serves as an upper half of an inner peripheral surface of the orifice, and an outer peripheral bracket of the diaphragm is provided. The orifice bottom surface and the orifice inner peripheral surface are bent to have an L-shaped cross section so as to bear the lower half thereof, and the upper end of the orifice outer peripheral metal is elastically contacted with the lower surface of the partition member via a rubber member. An upper end is extended upward, and an annular groove portion for positioning the partition is formed on the liquid chamber side peripheral surface of the vibration-proof base opposed to the upper extension portion, and the upper extension portion of the partition is press-fitted into the groove. Or the inserted liquid-filled vibration damping device. 7. The liquid according to claim 4, wherein an annular groove for positioning an outer peripheral metal of the diaphragm is formed on a lower surface of the rubber member, and an upper end of the outer metal is press-fitted or inserted into the groove. Enclosed vibration damping device. 8. A liquid filled type vibration damping device according to claim 1, wherein a rubber-like elastic film is provided in a central region of said partition.