JP2003004087A - Liquid sealed vibration isolator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration isolator which requires no vulcanized bonding means for an orifice forming member. SOLUTION: The liquid sealed vibration isolator comprises a rubber-like insulator 4 which is disposed between the first coupling member 91 mounted on a vibration body and the second coupling member 95 mounted by a member on the body side or the like, and which absorbs and intercepts vibrations from the vibration body, a main chamber 5 in which the chamber wall is formed by a part of insulator 4 and liquid is enclosed, an auxiliary chamber 6 in which a part of the chamber wall is partitioned and formed by the first diaphragm 7 while being connected to the main chamber 5 through the medium of the first orifice 11, a hard rubber orifice forming member 1 which partitions between the main chamber 5 and the auxiliary chamber 6 and contains an orifice or the like, a shield member 2 which is provided to the top end surface of the orifice forming member 1 and partitioned from the main chamber 5, the third liquid chamber 23 which is connected to the main chamber 5 through the medium of the second orifice 12, and the second diaphragm 15 which partitions and forms a part of the third liquid chamber 23.

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 having a vibration damping mechanism formed so as to cut off vibrations in a specific frequency range, and particularly to, for example, engine idling vibration and engine shake. An orifice for the purpose of isolating vibrations in two frequency ranges is provided at the partition member that partitions the main chamber and the sub chamber from each other, and the partition member is mainly formed of a hard rubber material. The present invention relates to a liquid filled type vibration damping device.

[0002]

2. Description of the Related Art Among vibration isolation devices, particularly in engine mounts for automobiles, an engine, which is a power source, is operated under various conditions from idling to the maximum rotation speed. Since it is used, it must be able to handle a wide range of frequencies. Therefore, two liquid chambers are provided in the interior, and the two liquid chambers are connected by an orifice, and the liquid in the orifice is designed to resonate at a specific frequency so as to isolate vibrations at a specific frequency. Was devised and is already known. Among such liquid-filled type vibration damping devices, examples of the type having two orifices include those described in JP 2001-20992 A.

[0003]

By the way, in the above-mentioned prior art, the two orifices are formed by a plastic molded body or an aluminum alloy member and the diaphragm is formed by a rubber member, and these are bonded by means of an adhesive. Alternatively, it is integrally formed by vulcanization adhesion means or the like. Therefore, in forming such two orifices or forming the diaphragm,
In addition to manufacturing parts (members) having a complicated shape, a vulcanization bonding process for rubber parts is required. As a result, there is a problem that the manufacturing cost must be increased.
In order to solve such a problem, it is an object of the present invention to provide a liquid-filled type vibration damping device of a type having two orifices, in which a vulcanization step for a rubber part is omitted. (Issue)

[0004]

In order to solve the above-mentioned problems, the following measures are taken in the present invention. That is, in the first aspect of the invention, the first connecting member attached to the vibrating body, the second connecting member attached to the member on the vehicle body side, and the first connecting member and the second connecting member. A rubber insulator for absorbing and blocking vibration from the vibrating body, a chamber wall of which is formed by a part of the insulator, and a main chamber in which liquid is sealed; A sub-chamber, which is connected to the chamber via a first orifice and has a part of the chamber wall defined by a first diaphragm; a partitioning part for partitioning the main chamber from the sub-chamber; Regarding a liquid-filled type vibration damping device of a type having two orifices consisting of a second orifice connecting a chamber and a third liquid chamber in which a part of the chamber wall is defined by a second diaphragm , The partition is in a cylindrical shape An orifice forming member formed of a rubber material having a first rubber and a second orifice in a peripheral portion thereof and having a predetermined rubber hardness, and a side surface of a main chamber of the orifice forming member or On one of the side surfaces of the sub-chamber, the orifice forming member is formed so as to be fitted and coupled, and a shield member formed of a sheet metal molded product, The peripheral end portion of the shield member to which the orifice forming member is attached is fixed to one end portion of the second connecting member by a predetermined coupling means.

By adopting such a configuration, in the present invention, each functional part including two orifices is integrally formed at the orifice forming member. Therefore, on the basis of such an orifice forming member, a metal shield member is fitted to one of the upper and lower end faces of the orifice forming member, and these are connected together with an insulator or a second connecting member to the second connecting member. By attaching (assembling) to one of the peripheral end portions of the member by, for example, clinch connecting means or caulking connecting means, a liquid filled type vibration damping device having two orifices can be formed relatively easily. Will be able to. Particularly, in the case of the present invention, the orifice forming member and the shield member are formed as separate members, and both are integrated by fitting and coupling. The vulcanization molding means used in the product is omitted. By omitting this vulcanization molding step, it becomes possible to reduce the cost of manufacturing parts.

Next, the invention according to claim 2 will be described. This one is also the same as the one described in claim 1 in the basic point. That is, in the present invention, the first connecting member attached to the vibrating body, the second connecting member attached to the member on the vehicle body side, and the first connecting member and the second connecting member are provided. A rubber-like insulator that absorbs and blocks vibrations from the vibrating body, a chamber whose wall is formed by a part of the insulator, and a main chamber in which liquid is sealed, and a first chamber in the main chamber. A sub-chamber which is connected through the orifice of (1) and a part of the chamber wall is defined by the first diaphragm, a partitioning section which divides the main chamber and the sub-chamber from each other, and the main chamber and the second chamber. A liquid-filled type vibration damping device of a type having two orifices consisting of a second orifice that connects a third liquid chamber in which a part of the chamber wall is partitioned and formed by the diaphragm of With a cylindrical shape An orifice forming member having a first orifice and a second orifice in the periphery thereof and entirely formed of a rubber-like elastic body, and a main chamber surface side and a sub chamber surface side of the orifice forming member. A shield member which is provided so as to sandwich the orifice forming member, and which is formed of a sheet metal molded product, and at a peripheral end portion of the shield member to which the orifice forming member is attached. Is to be fixed to one end portion of the second connecting member by a predetermined coupling means.

By adopting such a constitution, in the present invention, the above-mentioned orifice forming member is used as a base, and a metallic shield member is sandwiched between the upper and lower portions of the orifice forming member. By mounting, various functional parts including two orifices can be integrally formed. And these, together with the insulator or the second connecting member,
A liquid-filled type vibration damping device having two orifices is compared by attaching (assembling) to one peripheral end portion of the second connecting member by, for example, clinch connecting means or caulking connecting means. Can be easily formed. In particular, in the present invention, the orifice forming member and the shield member are formed as separate members, and these members are integrated by fitting and coupling. The vulcanization molding means used in the product is omitted. Further, in the present invention, since the two shield members for holding the orifice forming member are provided above and below, it is possible to form the orifice forming member with a relatively soft rubber material. Therefore, the spring constant of the second diaphragm can be lowered. As a result, it becomes possible to enhance the damping function of idling vibration.

Next, the invention according to claim 3 will be described. Also in this case, the basic points are the same as those described in claim 1 or claim 2. That is, according to the present invention, in the liquid-filled type vibration damping device according to claim 1 or 2, the peripheral end portion of the first diaphragm that partially forms a part of the sub chamber is also the orifice forming member and the shield member. At the same time, a configuration is adopted in which one end portion of the second connecting member is joined together by clinch joining means or crimp joining means. By adopting such a configuration, also in the present invention, the entire assembling process (the assembling process) including the assembling process of the diaphragm component as in the first or second embodiment. Can be simplified.

Next, the invention according to claim 4 will be described. Also in this case, the basic points are the same as those in claims 1 to 3 above. That is, in the present invention, with respect to the liquid-filled type vibration damping device according to any one of claims 1 to 3, the first orifice and the second orifice are respectively opened to the main chamber side or the sub chamber side. The openings are formed separately from each other in parallel. By adopting such a configuration, according to the present invention, it becomes possible to efficiently suppress the idling vibration and the vibration related to the engine shake.

Next, the invention according to claim 5 will be described. Also in this case, the basic points are the same as those in claims 1 to 3 above. That is, according to the present invention, in the liquid-filled type vibration damping device according to any one of claims 1 to 3, one opening portion of the first orifice and the second orifice toward the main chamber is provided, and It has been decided that these two orifices have a common part in some parts including the opening part. By adopting such a configuration,
According to the present invention, the effective length of the orifice for damping the engine shake can be sufficiently secured, and a sufficient damping function can be exerted.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described with reference to FIGS. Although it relates to the first embodiment of the present invention, the configuration thereof includes a first connecting member 91 attached to a vibrating body as shown in FIG. 1 or 2.
Second connecting member 95 attached to a member or the like on the vehicle body side
And a rubber-like insulator 4 which is between the first connecting member 91 and the second connecting member 95 and absorbs and blocks vibrations from the vibrating body, and a chamber wall of the insulator 4 at a part thereof. A main chamber 5 that is formed and in which a liquid is sealed, is connected to the main chamber 5 through a first orifice (first orifice) 11, and is connected to a first diaphragm (first diaphragm) 7. A sub-chamber 6 in which a part of the chamber wall is partitioned and formed, and a partitioning part for partitioning the main chamber 5 and the sub-chamber 6 from each other, and an orifice provided with the first orifice 11 and the like. The member 1, the shield member 2 provided on either one of the upper end surface side and the lower end surface side of the orifice forming member 1 to hold the orifice forming member 1, and the main chamber 5 Second orifice Second orifice) 12 and the third liquid chamber 23 which is connected via a second diaphragm (second diaphragm defining a part of the third liquid chamber 23) 1
It is basically composed of 5 and.

In the basic structure as described above, the orifice forming member 1 is made of a hard rubber material having a predetermined rubber hardness and has a cylindrical shape as a whole. The rubber hardness is such that an appropriate rigidity can be secured so that the orifices 11 and 12 are not deformed. Specifically, A50 in JIS hardness display
Those having the above hardness are preferable. Then, two orifices 11 and 12 are provided in an arc shape at the peripheral portion of such a cylindrical body. One of the two orifices (11) is formed so as to connect the main chamber 5 and the sub chamber 6 as shown in FIG. It is supposed to be responsible for restraint.
The other remaining one (12) is the main chamber 5 and the third liquid chamber 2.
3 is connected to the main chamber 5, and is formed so as to suppress the idling vibration propagated to the liquid in the main chamber 5. A concave portion that contributes to the formation of the third liquid chamber 23 is provided inside the two orifices 11 and 12, and the partition wall of the third liquid chamber 23 is provided at the bottom of the concave portion. The second diaphragm 15 forming a part of the above is integrally formed. A shield member 2 for liquid-tightly blocking the main chamber 5 is provided above the concave groove forming the concave portions and the two orifices 11 and 12. (See FIG. 1).

The shield member 2 is in the form of a cup as a whole, and is composed of a press-formed product based on a steel plate or a molded product of an aluminum alloy plate material. The cylindrical hard rubber orifice forming member 1 is fitted into such a cup-shaped molded product, and one end surface of the orifice forming member 1 is attached to the bottom surface of the shield member 2 made of the cup-shaped molded product. The first orifice 11, the second orifice 12, and the third liquid chamber 23 are integrally formed in a state of being pressed against each other. As a result, the shield member 2 and the orifice forming member 1 are brought into close contact with each other, and the sealing performance in the first orifice 11, the second orifice 12, the third liquid chamber 23, etc. is improved. In addition, in the one having such a structure,
A flange 22 is provided at the peripheral end portion. Then, the flange portion 717 of the metal fitting 71 forming the first diaphragm 7 is joined to the flange 22 in a state of being overlapped with each other, and these are provided together in the peripheral portion of the lower end portion of the second connecting member 95. It is designed to be joined at the joined portion 9. The connecting portion 9 is formed by clinch connecting means or caulking connecting means.
In this way, the shield member 2, the orifice forming member 1, the second diaphragm 15 and the like are integrally connected by the connecting portion 9 provided at the lower peripheral portion of the second connecting member 95. As a result, the sub chamber 6 defined by the first diaphragm 7 and the like is formed below the second diaphragm 15.

In the first embodiment, a so-called parallel type in which the openings of the orifices 11 and 12 to the main chamber 5 side are provided independently of each other is shown in FIG. In addition to this, as shown in FIG. 2, the first orifice 11 and the second orifice 12 have a common opening on the main chamber 5 side, that is, a common opening 19 is provided. , Both orifices 11,
A part formed of 12 has a common part. The basic structure of this device is the same as that of the parallel structure as shown in FIG. The difference is that
As shown in FIG. 2, the openings of the orifices 11 and 12 toward the main chamber 5 side are common, and a part of the orifices has a common part. The first orifice 11 is first provided in an arc shape through the common opening 19, and the first orifice 11 is provided so as to partition the sub chamber 6 and the third liquid chamber 23. Two
It is adapted to communicate with the sub chamber 6 through a communication port 21 provided in the partition wall. On the other hand, the second orifice 12 is branched from a portion common to the first orifice 11 and circulates inside the first orifice 11 in an arc shape, and then communicates with the third liquid chamber 23. is there. In addition to the one having the one opening (common opening) 19 on the side of the main chamber 5 and having the orifice branched in the middle, the third liquid chamber 2 is provided in the middle of the orifice.
In addition to having No. 3, the orifice is continuously formed toward the sub chamber 6 side via the third liquid chamber 23.

The specific structure of the type having the common opening 19 and the common orifice portion is, as shown in FIG. 2, entirely made of a hard rubber cylindrical body. While having the second diaphragm 15 at the central portion of the upper portion, a third liquid chamber 23 having a predetermined space is provided at the lower portion thereof.
Further, the first orifice 1 is provided outside the third liquid chamber 23.
The first and second orifices 12 are formed on the basis of the orifice forming member 1 provided in an arc shape. A shield member 2 is provided at a lower portion of the orifice forming member 1 having such a structure to partition the shield member 2 from the sub chamber 6, and the third liquid chamber 23, the second orifice 12, the One orifice 11 is formed. The sub chamber 6 of the first orifice 11 is provided in a part of the shield member 2.
A communication port 21 that forms an opening to the side is provided.

Further, the flange 22 formed in the peripheral portion of the shield member 2 and the flange portion 717 formed in the peripheral portion of the metal fitting 71 forming the first diaphragm 7 are overlapped with each other. At the connecting portion 9 provided at the lower end portion of the second connecting member 95,
The clinch connecting means or the crimping connecting means are integrally connected. In the present embodiment, both of the orifices 11 and 12 are formed so that the opening toward the main chamber 5 has a common opening 19 as shown in FIG. It branches off from the middle of the common portion with one orifice 11 and communicates with the third liquid chamber 23. Also in the present embodiment having such a configuration, as in the case shown in FIG. 1, the orifice forming member 1 made of hard rubber and the shield member 2 made of a metal press-formed product are fitted and coupled. By doing so, the first orifice 11, the second orifice 12, the third liquid chamber 23 and the like can be formed relatively easily.

Next, the operation and the like of the present embodiment having such a configuration will be described. That is, in the present embodiment, the functional units including the two orifices 11 and 12 are integrally formed by the orifice forming member 1 and the shield member 2. Since the two members 1 and 2 are used as a base and the insulator 4 or the first diaphragm 7 made of a rubber-like member is assembled around the members 1, 2, the vibration-proof mechanism can be formed relatively easily. The Rukoto. For example, as shown in FIG. 1, the orifice forming member 1 is provided in a cup-shaped shield member 2.
By fitting in, the first orifice 11, the second orifice 12, the third liquid chamber 23, etc. are formed.

Therefore, in the present embodiment,
First orifice 11 that contributes to the suppression of shake vibration
In addition, the second orifice 12 which absorbs and blocks the idling vibration is easily formed by the circumferential groove and the shield member 2 provided in the peripheral portion of the orifice forming member 1 made of hard rubber. Therefore, it is not necessary to vulcanize and adhere a rubber material or the like to the sheet metal press-formed product as in the conventional one. Therefore, the cylindrical orifice forming member 1
The third liquid chamber 23, the second orifice 12, the first orifice 11 and the like are formed by covering the upper part of the cup-shaped shield member 2. Also, for example, in FIG.
As shown in FIG. 5, the shield member 2 is fitted to the lower portion of the cylindrical orifice forming member 1, and the shield member 2 is caulked at the joint portion 9 provided around the lower end portion of the second connecting member 95. It becomes possible to form the first orifice 11, the second orifice 12, the third liquid chamber 23, and the like by integrally combining the components with each other. Is omitted. Therefore, the cost for forming each functional part is reduced, and the overall manufacturing cost can be reduced.

Next, a second embodiment will be described with reference to FIGS. The one related to this embodiment is also
The basic points are the same as those of the first embodiment. The difference is that the shield member has a two-part configuration (2, 2 ') provided above and below the orifice forming member 1 and is held in a state of being sandwiched vertically by the shield member 2, 2'. The orifice forming member 1 to be formed is made of a rubber material having a normal softness. Specifically, as shown in FIGS. 3 to 5, a first connecting member 91 attached to the vibrating body and a second connecting member 95 attached to a member or the like on the vehicle body side,
Between the first connecting member 91 and the second connecting member 95, a rubber-like insulator 4 that absorbs and blocks vibration from the vibrating body, and a chamber wall is formed by a part of the insulator 4. A main chamber 5 in which a liquid is sealed, and a sub chamber 6 which is connected to the main chamber 5 through a first orifice 11 and in which a part of the chamber wall is defined by a first diaphragm 7. And an orifice forming member 1 which serves as a partitioning portion for partitioning the main chamber 5 and the sub chamber 6 and is provided with the first orifice 11 and the like, and an upper end surface side of the orifice forming member 1 An upper shield member 2 which is provided and holds the orifice forming member 1 so as to be housed, and an orifice forming member 1 which is provided on the lower end surface side of the orifice forming member 1 and the upper shield member 2 To hold to the lower shield member 2 '
And the second orifice 1 for the main chamber 5 or the sub chamber 6
The third liquid chamber 23 connected via 2 and the third liquid chamber 2
And a second diaphragm 15 that partially forms a part of 3.

In the basic structure as described above, the orifice forming member 1 is made of a rubber material having a predetermined softness, and has a cylindrical shape as a whole. In particular, in the present embodiment, the orifice forming member 1 is adapted to be held in a state of being vertically sandwiched by the shield members 2 and 2 ′, which is suitable for forming the second diaphragm 15. It can be made of a rubber material having a relatively soft rubber hardness. As the hardness of this rubber material, generally, the hardness within the range of A40 to A80 in JIS hardness display is used. Further, more preferably A45 to A70
Within the range of. Then, at the peripheral portion of such a cylindrical body, two orifices 11,
12 is provided in an arc shape. One of the two orifices (11) is formed so as to connect the main chamber 5 and the sub chamber 6 as shown in FIG. It is supposed to be responsible for restraint. The other one (12), which is the remaining one, connects the main chamber 5 and the third liquid chamber 23, and suppresses the idling vibration propagated to the liquid in the main chamber 5. It is formed as follows. And two such orifices 1
A concave part that contributes to the formation of the third liquid chamber 23 is provided inside the first and the second liquid chambers 23, and a part of the partition wall of the third liquid chamber 23 is formed at the bottom of the concave part. The diaphragm 15 is integrally formed. An upper shield member 2 for liquid-tightly blocking the main chamber 5 is provided above the recessed groove and the recessed groove forming the two orifices 11 and 12. There is something. A lower shield member 2 ', which is also in the shape of a cup, is attached to the lower end surface of the orifice forming member 1.

Incidentally, such both shield members 2, 2 '
Both have a cup-like shape as a whole, and are formed by a press-formed product based on a steel plate or a molded product of an aluminum alloy plate material. And
By holding the cylindrical rubber orifice-forming member 1 between the two cup-shaped molded products as described above and holding them in a state of being pressed against each other, the first orifice 11, The second orifice 12 and the third liquid chamber 23 are integrally formed. As a result, the adhesion between the orifice forming member 1 and both shield members 2, 2'is enhanced, and each orifice 1
The sealability of 1, 12, etc. will be improved. In addition, in such a structure, a flange 22 is provided at the peripheral end portion of the upper shield member 2. Then, the flange portion 717 of the metal fitting 71 forming the first diaphragm 7 is joined to the flange 22 in a state of being overlapped with each other, and these are provided together in the peripheral portion of the lower end portion of the second connecting member 95. It is designed to be joined at the joined portion 9. The connecting portion 9 is formed by clinch connecting means or caulking connecting means. In this way, the shield members 2 and 2 ′, the orifice forming member 1, and the second diaphragm 1 are thus formed.
5 and the like are integrally coupled by a coupling portion 9 provided at a peripheral portion of the lower portion of the second connecting member 95, so that the first diaphragm 7 is attached to the lower portion of the second diaphragm 15. The sub-chamber 6 is formed by being divided into parts.

A modification of the first orifice 11 and the second orifice 12 arranged in parallel will be described with reference to FIG. However, the characteristic of this is that the second orifice 12 connected to the third liquid chamber 23 is opened to the sub chamber 6 side. That is, the third liquid chamber 23 is the second orifice 12
Further, it is adapted to communicate with the sub chamber 6 through the communication port 21 'for the second orifice 12. In other respects, the first orifice 11 and the second orifice 12 are separately provided in parallel, and the configuration is the same as that shown in FIG. By adopting such a configuration, the vibration of the specific frequency, such as the idling vibration propagated to the liquid in the main chamber 5, is directly propagated to the second diaphragm 15, and the vibration is generated in the third liquid chamber 23. Will be transmitted to the liquid. The fluid pressure fluctuation in the third liquid chamber 23 thus propagated is propagated to the sub chamber 6 side through the second orifice 12, and the liquid in the second orifice 12 at this time is propagated. Due to the resonance action, the input vibration related to the idling vibration is absorbed or blocked.

As described above, in the second embodiment, the so-called parallel type in which the openings of the orifices 11 and 12 to the main chamber 5 side are independently provided is shown in FIGS. As shown in FIG. 5, in addition to this, as shown in FIG. 4, the openings of the first orifice 11 and the second orifice 12 to the main chamber 5 side are made common, that is, the common opening 19 And the orifices 11 and 12 are formed so as to have a common portion. This one has the basic configuration
It is the same as the parallel type as shown in FIG. The difference is that, as shown in FIG. 4, the openings of the orifices 11 and 12 toward the main chamber 5 are common, and a part of the orifices has a common part. . First, the first orifice 11 is provided in an arc shape through the common opening 19, and the first orifice 11 is provided in such a manner that it partitions the sub chamber 6 from the third liquid chamber 23. It is adapted to communicate with the sub chamber 6 via a communication port 21 provided in the partition wall of the member 2 '. On the other hand, the second orifice 12 is branched from a portion common to the first orifice 11 and circulates inside the first orifice 11 in an arc shape, and then communicates with the third liquid chamber 23. is there. In addition to the one having the one opening (common opening) 19 on the main chamber 5 side and the orifice branching in the middle, a third liquid chamber 23 is provided in the middle of the orifice, and
It is also conceivable that the orifice is continuously formed toward the sub chamber 6 side via the third liquid chamber 23.

Next, the operation and the like of the present embodiment having such a configuration will be described. The basic point of the present embodiment is the same as that of the first embodiment. The characteristic of this is that the shield member for holding the orifice forming member 1 is composed of two parts (2, 2 ') which are vertically separated. As a result, the orifice forming member 1 can be reliably held, and the orifice forming member 1 can be formed of a soft rubber material. As a result, the rigidity of the second diaphragm 15 can be set low, and the damping function of idling vibration can be enhanced. The other points are the same as those described in the first embodiment. That is, in the present embodiment, the functional units including the two orifices 11 and 12 are integrally formed by the orifice forming member 1 and the two shield members 2 and 2 '. Therefore, each member 1, 2, 2 '
By mounting the insulator 4 made of a rubber-like member, the first diaphragm 7, or the like on the basis of the above, the vibration-proof mechanism portion can be formed relatively easily. For example, as shown in FIG. 3, the orifice forming member 1 is provided in both the upper and lower shield members 2 and 2 '.
By fitting in, the first orifice 11, the second orifice 12, the third liquid chamber 23, etc. are formed.

Therefore, in the present embodiment,
First orifice 11 that contributes to the suppression of shake vibration
Also, the second orifice 12 which absorbs and blocks the idling vibration is provided with a circumferential groove provided in the peripheral portion of the rubber-made orifice forming member 1 and both shield members 2, 2 '.
Therefore, it is not necessary to vulcanize and adhere a rubber material or the like to the sheet metal press-formed product as in the conventional one. Then, the shield members 2 and 2 ′ provided above and below the cylindrical orifice forming member 1 are integrated with the connecting portion 9 provided at the lower end portion of the second connecting member 95 by caulking connecting means or the like. The first orifice 11, the second orifice 12, the third liquid chamber 23
It becomes possible to relatively easily form a vibration isolation mechanism mainly for the above. In addition, in the present embodiment, the first orifice 11 which is a shake orifice is used.
By forming the two-step winding shape, it becomes possible to take a long effective length. As a result, it becomes possible to generate a large value of damping force required for suppressing shake vibration.

[0026]

According to the present invention, the first connecting member attached to the vibrating body, the second connecting member attached to the member on the vehicle body side, the first connecting member and the second connecting member. A rubber insulator for absorbing and blocking vibration from the vibrating body, a chamber wall of which is formed by a part of the insulator, and a main chamber in which liquid is sealed; A sub-chamber, which is connected to the chamber via a first orifice and has a part of the chamber wall defined by a first diaphragm; a partitioning part for partitioning the main chamber from the sub-chamber; A liquid-filled type vibration damping device of a type having two orifices consisting of a second orifice connecting between the chamber and the third liquid chamber, wherein the partition section has a cylindrical shape. , A first orifice and a second An orifice forming member that has an orifice and is entirely formed of a hard rubber material, and the orifice forming member is fitted and connected to either one of the main chamber side surface and the sub chamber side surface of the orifice forming member. And a shield member formed of a sheet metal molded product, and the peripheral end portion of the shield member on which the orifice forming member is mounted Since a structure is adopted in which one end of the connecting member is connected by clinch connecting means or caulking connecting means, each functional part including two orifices is integrated with the orifice forming member. It becomes possible to collectively form them, and it is possible to simplify the entire configuration.

On the basis of such an orifice forming member, a shield member made of sheet metal is fitted to one of the upper and lower end faces of the orifice forming member, and these are joined together with an insulator or a second connecting member. To relatively easily form a liquid-filled type vibration damping device having two orifices by attaching (assembling) to one peripheral end portion of the connecting member with clinch connecting means or crimping connecting means. Is now possible. Further, according to the present invention, the orifice forming member and the shield member are formed as separate members, and both members are integrated by fitting and coupling. The vulcanization and molding means used in the manufacturing method has been omitted, and the cost for manufacturing parts can be reduced.

Further, in the present invention, the first connecting member attached to the vibrating body, the second connecting member attached to the member on the vehicle body side, the first connecting member and the second connecting member. A rubber-like insulator between which the vibration from the vibrating body is absorbed and blocked; a main chamber in which a chamber wall is formed by a part of the insulator and a liquid is sealed; and the main chamber. A sub-chamber which is connected to the main chamber through a first orifice and has a part of the chamber wall defined by a first diaphragm; a partitioning section for partitioning the main chamber from the sub-chamber; And a second orifice connecting between the third liquid chamber and a liquid-filled type vibration damping device of the type having two orifices, the partition section having a cylindrical shape, The first orifice and An orifice forming member that has a second orifice and is entirely formed of a rubber-like elastic body, and is provided so as to sandwich this orifice forming member between the main chamber surface side and the sub chamber surface side of the orifice forming member. And a shield member formed of a sheet metal molded product, and the peripheral end portion of the shield member on which the orifice forming member is mounted is located at one end portion of the second connecting member. Since it was decided to adopt a configuration in which the clinch coupling means or caulking coupling means are used for coupling, a sheet metal shield member is provided above and below this orifice forming member, and the orifice forming member is By mounting with sandwiching it, various functional parts including two orifices can be integrally formed. Was Tsu. And
Two orifices are provided by attaching (assembling) these together with an insulator or a second connecting member to one peripheral end portion of the second connecting member by clinch connecting means or caulking connecting means. It has become possible to form a liquid-filled type vibration damping device of the type relatively easily. Particularly, in the case of the present invention, the orifice forming member and the shield member are formed as separate members, and these members are integrated by fitting and coupling. The vulcanization molding means used in the manufacturing method has been omitted, and the cost for manufacturing parts can be reduced. Further, in the present invention, since the two shield members for holding the orifice forming member are provided above and below, the orifice forming member can be formed of a relatively soft rubber material. As a result, the spring constant of the second diaphragm can be made low. As a result, it became possible to improve the damping function of idling vibration.

Further, according to the present invention, the peripheral end portion of the first diaphragm, which forms a part of the sub-chamber, also forms the one end portion of the second connecting member together with the orifice forming member and the shield member. However, since they are connected together by the clinch connecting means or the crimping connecting means, it is possible to simplify the entire assembling process (the assembling process) including the assembling process of the diaphragm parts. became.

Further, in the present invention, the first orifice and the second orifice are formed in parallel so that the openings to the main chamber side and the sub-chamber side are independently provided. , Idling vibration and vibration related to engine shake can be efficiently suppressed.

Further, in the present invention, one opening of the first orifice and the second orifice toward the main chamber side is provided, and the two orifices of
Since it has a common part in that part, it becomes possible to secure a sufficient effective length of the orifice for the purpose of damping the engine shake, and it is possible to exert a sufficient damping function. I can do it now.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the overall configuration of a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing the overall configuration of a modification of the first embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view showing the overall structure of a second embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a modification of the second embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view showing another modification of the second embodiment of the present invention.

[Explanation of symbols]

1 Orifice forming member 11 First Orifice (First Orifice) 12 Second Orifice (Second Orifice) 15 Second diaphragm (second diaphragm) 19 common openings 2 Shield member (upper shield member) 2'lower shield member 21 communication port 21 'Communication port for second orifice 22 Flange 23 Third Liquid Chamber 24 opening 4 insulators 5 Main room 6 Sub-room 7 First diaphragm (first diaphragm) 71 metal fittings 717 Flange 9 connection 91 First connection member 95 Second connection member

Continued front page    (72) Inventor Sada Shimoda             Aichi Prefecture Kasuga-cho, Nishikasugai-gun Ochiai character Nagahata 1             Address within Toyoda Gosei Co., Ltd. (72) Inventor Naoki Mori             Aichi Prefecture Kasuga-cho, Nishikasugai-gun Ochiai character Nagahata 1             Address within Toyoda Gosei Co., Ltd. (72) Inventor Futami Hama             Aichi Prefecture Kasuga-cho, Nishikasugai-gun Ochiai character Nagahata 1             Address within Toyoda Gosei Co., Ltd. (72) Inventor Tetsuo Asano             Aichi Prefecture Kasuga-cho, Nishikasugai-gun Ochiai character Nagahata 1             Address within Toyoda Gosei Co., Ltd. F-term (reference) 3D035 CA05 CA34                 3J047 AA03 CA06 DA01 FA02 GA01

Claims (5)

[Claims] 1. A first connecting member attached to a vibrating body, a second connecting member attached to a member or the like on a vehicle body, and the vibration between the first connecting member and the second connecting member. A rubber-like insulator that absorbs and blocks vibrations from the body, a main chamber in which a chamber wall is formed by a part of the insulator, and a liquid is sealed therein, and a first orifice in the main chamber. A sub-chamber which is connected via the sub-chamber and in which a part of the chamber wall is defined by the first diaphragm, and a partitioning section which partitions the main chamber from the sub-chamber.
A liquid-filled type vibration isolation type having two orifices consisting of a second orifice connecting the main chamber and a third liquid chamber in which a part of the chamber wall is defined by the second diaphragm. In the device, the partition section is formed in a cylindrical shape, and has an orifice formed of a rubber material having a first rubber and a second orifice in a peripheral portion thereof and having a predetermined rubber hardness. A member and a sheet metal molded product formed on one of the main chamber side surface and the sub chamber side surface of the orifice forming member so that the orifice forming member is fitted and coupled. A shield member to be formed, and the peripheral end portion of the shield member on which the orifice forming member is mounted is connected to one end portion of the second connecting member by a predetermined connection. Liquid-filled vibration damping device being characterized in that so as to fixed in means. 2. A first connecting member attached to a vibrating body, a second connecting member attached to a member or the like on a vehicle body, and the vibration between the first connecting member and the second connecting member. A rubber-like insulator that absorbs and blocks vibrations from the body, a main chamber in which a chamber wall is formed by a part of the insulator, and a liquid is sealed therein, and a first orifice in the main chamber. A sub-chamber which is connected via the sub-chamber and in which a part of the chamber wall is defined by the first diaphragm, and a partitioning section which partitions the main chamber from the sub-chamber.
A liquid-filled type vibration isolation type having two orifices consisting of a second orifice connecting the main chamber and a third liquid chamber in which a part of the chamber wall is defined by the second diaphragm. In the device, the partition part is formed in a cylindrical shape, and has an orifice forming member having a first orifice and a second orifice in its peripheral part and entirely formed of a rubber-like elastic body. A main chamber surface side and a sub-chamber surface side of the orifice forming member are provided so as to sandwich the orifice forming member, and a shield member formed of a sheet metal molded product, The peripheral end portion of the shield member having the orifice forming member mounted thereon is fixed to one end portion of the second connecting member by a predetermined coupling means. Liquid-filled vibration damping device. 3. The liquid-filled type vibration damping device according to claim 1 or 2, wherein the peripheral end portion of the first diaphragm, which defines and forms a part of the sub-chamber, together with the orifice forming member and the shield member, A liquid-filled type vibration damping device, characterized in that it is connected to one end of the second connecting member by a clinch connecting means or a crimping connecting means. 4. The liquid-filled type vibration damping device according to claim 1, wherein the first orifice and the second orifice are respectively opened to the main chamber side or the sub chamber side. A liquid-filled type vibration damping device, characterized in that parts are formed separately and in parallel. 5. The liquid-filled type vibration damping device according to claim 1, wherein one opening of the first orifice and the second orifice toward the main chamber is provided, and A liquid-filled type vibration damping device, characterized in that two orifices have a common portion in a part thereof, including the opening portion.