JPH09177869A - Liquid seal type engine mount and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform tuning the notch frequency of a dynamic spring constant further to the low frequency side as interference of an umbrella-form member is prevented from occurring. SOLUTION: A pair of first and second mounting members 1 and 2 separated away from each other in a vibration input direction are intercoupled through an elastic support body 3. A liquid chamber 4 filled with liquid 6 is partitioned between the elastic support body 3 and a diaphragm 5. The liquid chamber 4 is partitioned into a pressure receiving chamber 8 and a balance chamber 9 by a partition body 7 having an orifice 14. An umbrella-form member 10 is disposed in a pressure receiving chamber and the interior of the pressure receiving chamber is partitioned into a main chamber 8a and an auxiliary chamber part 8b which are intercommunicated through a gap 15. The top part of the auxiliary part is sealed with air 16, and the expansion spring of the elastic support body is reduced in an apparent manner through a volume spring of seal air due to the increase of the inner pressure in the auxiliary chamber during input of high frequency vibration. In a seal amount of air, the volume spring is set to a value in a range of 1/2-1/4 of the expansion spring and 0.5-10cc, preferably 1.5-3cc. Filling with air is effected in such a state that with upside down, the elastic support body is deformed through downward displacement of the first mounting member and in such a state that a seal space is formed between the umbrella member and the first mounting member or filling with the liquid 6 is effected in such a state that the umbrella member having a recessed part is brought upside down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled engine mount in which a liquid chamber is partitioned by a partition into a pressure receiving chamber and a parallel chamber, and an umbrella-shaped member is provided in the pressure receiving chamber, and a method for manufacturing the same. .

[0002]

2. Description of the Related Art Conventionally, various types of liquid-filled engine mounts of this type have been known (for example,
(See Japanese Patent Publication No. 5-17415). In this device, the pressure receiving chamber facing the elastic support body that is deformed by vibration input and the equilibrium chamber that can be expanded and contracted by the elastic thin film member are communicated with each other by the orifice provided in the partition body, and the liquid column that passes through this orifice. The resonance mainly attenuates the input vibration in the low frequency range, while the liquid flow in the pressure receiving chamber through the gap on the outer peripheral side of the umbrella-shaped member against the input vibration in the high frequency range that causes the orifice to be clogged. As a result, the dynamic spring constant can be reduced. That is, in FIG. 4 showing general characteristics by a one-dot chain line,
A portion (notch) where the dynamic spring constant decreases at the resonance frequency H1 of the mass-spring system determined by the equivalent mass of the liquid flowing through the gap and the expansion spring constant of the elastic support.
Occurs. Frequency at which this notch occurs (notch frequency)
H1 is determined by the expansion spring constant of the elastic support and the size of the gap.

[0003]

In the conventional liquid-filled engine mount, in order to set the notch frequency H1 to a lower frequency, the outer diameter of the umbrella-shaped member is made larger and the gap is made larger. Should be made smaller, or the expansion spring constant should be made smaller.
However, this expanded spring constant is almost determined by a value required to fulfill its original role of supporting the weight of the engine to be supported, etc., and the value cannot be changed freely. On the other hand, if the gap is made smaller, the umbrella-shaped member may interfere with the inner surface of the pressure-receiving chamber, such as interference.

The present invention has been made in view of such circumstances, and an object thereof is to tune the notch frequency of the dynamic spring constant to a lower frequency side while avoiding the interference of the umbrella-shaped member. To make it possible.

[0005]

In order to achieve the above object, the invention according to claim 1 has a pair of first and second mounting members arranged apart from each other in the vibration input direction, and a pair of these mounting members. At least a part of an elastic support body that connects the mounting members to each other, a liquid chamber defined by the elastic support body and containing a liquid, and a pressure receiving chamber defined by the lower surface of the elastic support body. Is defined by an elastic thin film member to partition it into an expandable and contractible equilibrium chamber, an orifice for communicating the pressure receiving chamber and the equilibrium chamber with each other, and the elastic support of the pressure receiving chamber supported by the first mounting member. Umbrella that expands in a direction orthogonal to the vibration input direction so as to leave a gap around the outer periphery at a position between the body and the partition body and divides the pressure receiving chamber into a main chamber portion on the partition body side and a sub chamber portion on the elastic support body side. It is premised that it has a strip-shaped member. In this structure, a specific amount of gas is sealed in the sub chamber. In addition to the air, a gas that does not dissolve in a liquid such as nitrogen gas or an inert gas may be used as the sealed gas.

In the above structure, when vibration in a high frequency range that causes the orifice to be clogged is input, the vibration of the umbrella-shaped member caused by the vibration input causes the outer periphery of the umbrella-shaped member and the inner surface of the pressure-receiving chamber to be separated. The liquid flows from the main chamber portion to the sub chamber portion side through the gap between them to increase the internal pressure in the sub chamber portion. In response to this increase in internal pressure, the elastic bearing receives hydraulic pressure on the outer side of the pressure receiving chamber, and at the same time, the enclosed gas in the sub chamber portion is compressed. At this time, since the elastic support member exerts an expansion spring that resists the hydraulic pressure on the side that expands the pressure receiving chamber, and at the same time, it exerts a volume spring that accompanies the volume change of the enclosed gas. Is exerted, the hydraulic pressure carried by the expansion spring of the elastic support is reduced. As a result, when the expansion spring constant of the elastic support is set to the originally required value, when the vibration in the high frequency range is input, the same effect as that of lowering the expansion spring constant can be obtained. Therefore, even if the gap between the umbrella-shaped members is dimensioned so as not to cause interference, the notch frequency when vibration in the high frequency range is input can be set to a frequency side lower than the conventional frequency.

Here, the enclosed amount of the gas may be determined as follows. That is, the enclosed gas causes a liquid flow through the orifice as the internal pressure of the pressure receiving chamber increases due to the vibration input in the low frequency range. At this time, the enclosed gas suppresses the internal pressure increase due to the volume change due to compression, and the orifice It acts on the side that reduces the flow rate of liquid passing through.
Therefore, in order to secure the required damping characteristic (tan δ), in order to secure a predetermined amount of the liquid flowing through the orifice, the amount of the enclosed gas is set to the predetermined amount of the liquid. However, in order to reduce the dynamic spring constant, it is necessary to secure a predetermined amount of enclosed gas.
Therefore, the specific amount of the enclosed gas may be experimentally determined according to the vehicle in which the engine mount is mounted while adjusting the requirements of both.

The second aspect of the present invention specifically specifies the preferable amount of gas to be enclosed in the first aspect of the invention, and the volume spring of the enclosed gas is elastically supported as the amount of enclosed gas. 1/2 to 1/4 of body expansion spring
The range is set to correspond to.

In the case of the above construction, the volume spring constant of the enclosed gas in the sub chamber is 1/2 to 1/1 / that of the expansion spring of the elastic support.
Since the amount of gas in the range corresponding to 4 is enclosed, it is equivalent to the fact that the enclosed gas reduces the expansion spring constant of the elastic bearing body to 1/3 to 1/5 at the time of vibration input in the high frequency range. Of the damping characteristic (tan δ)
As a result, it is possible to secure a predetermined value as a reduction of the dynamic spring constant while securing a value required for the vehicle. The spring constant of the elastic support is K1, and the spring constant of the enclosed gas is K2.
, If the expansion spring constant is K, then K = K1 when there is no enclosed gas, whereas K when there is enclosed gas.
Since 1 and K2 act in series, 1 / K = (1 / K1) + (1 / K2). Here, if K2 = K1 / 2 to K1 / 4,
K = K1 / 3 to K1 / 5, which is 1/3 to 1/5 of the case without the enclosed gas.

The invention according to claim 3 specifically specifies a preferable range as the amount of enclosed gas in the invention according to claim 1, and the enclosed amount of gas is 0.5 cc.
It is set to fall within the range of 10 cc.

In the case of the above construction, the liquid-filled engine mount is used as the amount of the enclosed gas which can secure a predetermined value as the reduction of the dynamic spring constant while securing the value required for the vehicle as the damping characteristic. The range that can be enclosed is specified.

The invention according to claim 4 specifies a further preferable range as the range of the enclosed amount of gas in the invention according to claim 3, wherein the enclosed amount of the gas is 1.5.
It is set to be in the range of cc to 3 cc.

In the case of the above construction, since the enclosed gas is 3 cc or less, the tan δ value of 0.6 or more, which is preferable for vibration damping in the vehicle, is obtained as the damping characteristic, while the enclosed gas is 0.5 cc or more. Therefore, it is possible to reduce the dynamic spring constant.

According to a fifth aspect of the present invention, the partition body according to the first aspect of the present invention is disposed so as to face both the pressure receiving chamber and the equilibrium chamber, and is slightly displaced in response to a change in hydraulic pressure from the pressure receiving chamber. A mechanism for changing the volume of the pressure receiving chamber is provided.

In the case of the above construction, when the vibration in the high frequency range is input, the displacement of the umbrella-like member shifts the notch frequency based on the enclosed gas to the lower frequency side and the volume of the pressure receiving chamber by the rattling mechanism. Due to the fluctuation, the dynamic spring constant can be reduced on the lower frequency side than the case of using the enclosed gas. Therefore, it is possible to reduce the vibration transmissibility in a wider frequency range.

A sixth aspect of the present invention relates to a method for manufacturing the liquid-sealed engine mount according to the first aspect of the invention, wherein the first and second parts are arranged apart from each other in the vibration input direction. A pair of mounting members, an elastic supporting body that connects the pair of mounting members to each other, a liquid chamber defined by the elastic supporting body and containing a liquid, and a liquid chamber defined by the lower surface of the elastic supporting body. A partition body that divides the pressure receiving chamber formed into an equilibrium chamber, at least a part of which is defined by an elastic thin film member and is expandable / contractible, an orifice that connects the pressure receiving chamber and the equilibrium chamber to each other, and the first mounting member. At a position between the elastic support and the partition of the pressure receiving chamber, the pressure receiving chamber spreads out in a direction orthogonal to the vibration input direction to divide the pressure receiving chamber into a main chamber part on the partition side and a sub chamber on the elastic support side. With an umbrella-shaped member Method of manufacturing a sealed type engine mount is intended to assume. In this structure, first, the first mounting member to which the above-mentioned umbrella-shaped member is mounted is connected to one end opening portions of the tubular members of both end openings forming a part of the second mounting member via the elastic bearing members. Next, by moving the first mounting member downward with respect to the tubular member in a state where the first mounting member is disposed on the lower side and the tubular member is disposed on the upper side, the outer periphery of the umbrella-shaped member is The part is brought into close contact with the inner surface of the elastic support body so that a closed space is formed between the umbrella-shaped member and the elastic support body. After that, the liquid is injected from the opening at the other end of the tubular member.

In the case of the above construction, with the first mounting member having the umbrella-shaped member mounted on the lower side, the first mounting member is moved downward relative to the tubular member of the second mounting member. As the elastic support is extended, the elastic support is extended and further inclined, and as a result, the outer peripheral portion of the umbrella-shaped member is brought into close contact with the inner surface of the elastic support, so that a closed space is formed between the umbrella-shaped member and the elastic support. Will be formed. At the time of this work, by placing in the atmosphere of the gas that seals the vicinity of the umbrella-shaped member, the gas is kept sealed in the sealed space. Then, in a state where the gas is hermetically sealed in the hermetically sealed space, the liquid is injected from the other end opening portion of the tubular member, and then the partition bodies and the like are sequentially connected and turned upside down, whereby the gas is sealed. A liquid-filled engine mount in a closed state is formed. Therefore, by setting the shape and dimensions so that the volume of the closed space corresponds to the amount of gas enclosed, it becomes possible to reliably enclose a predetermined amount of gas.

Further, the invention according to claim 7 is based on claim 1.
A liquid-filled engine mount according to the invention described above, which relates to a manufacturing method different from that of the invention according to claim 6, wherein a pair of first and second mounting members are arranged apart from each other in the vibration input direction, An elastic supporting body connecting the pair of mounting members to each other, a liquid chamber defined by the elastic supporting body and containing a liquid, and a pressure receiving chamber defined by the lower surface of the elastic supporting body. A partition body that is partitioned at least in part by an elastic thin film member to divide it into an expandable / contractible equilibrium chamber, an orifice that communicates the pressure receiving chamber and the equilibrium chamber with each other, and the pressure receiving chamber that is supported by the first mounting member. An umbrella-shaped member that extends in a direction orthogonal to the vibration input direction at a position between the elastic support and the partition to divide the pressure-receiving chamber into a main chamber on the partition side and a sub-chamber on the elastic support side. Liquid-filled engine Method of manufacturing the unmount is to assume. In this structure, as the umbrella-shaped member, a member having a concave portion having a volume corresponding to the volume of the enclosed gas is formed so as to face the elastic support body and open at a site facing the elastic support body. Then, the first mounting member to which the umbrella-shaped member in which the recess is formed is mounted and the one end opening portion of the tubular member of both end openings forming a part of the second mounting member are connected via the elastic bearing body. Next, the liquid is injected from the other end opening portion of the tubular member with the first mounting member placed on the lower side and the tubular member placed on the upper side.

In the case of the above construction, by disposing the first mounting member, to which the umbrella-shaped member is mounted, on the lower side, the recess formed in the umbrella-shaped member is opened downward. In this state, the concave portion is filled with gas under an atmosphere of gas that seals the vicinity of the umbrella-shaped member, and in this state, the liquid is injected from the other end opening side located above the tubular member to form the concave portion. The pressure receiving chamber is filled with the liquid in a state where the gas is enclosed therein. After that, the partition bodies and the like are sequentially connected and turned upside down to form a liquid-filled engine mount in which gas is filled. Further, since the recess is formed to have a volume corresponding to the amount of gas enclosed, it is possible to reliably enclose a predetermined amount of gas.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIG. 1 shows a liquid-sealed engine mount according to a first embodiment of the present invention, in which 1 denotes a cylinder shaft X in a vibration input direction (vertical direction in FIG. 1; Direction)) the first mounting member disposed on the upper side,
Reference numeral 2 is a cylindrical second mounting member arranged on the lower side, 3 is an elastic support body that connects the mounting members 1 and 2 to each other, and 4 is between the elastic support body 3 and a diaphragm 5 which is an elastic thin film member. A liquid chamber in which the incompressible liquid 6 is enclosed, and 7 is a liquid chamber 4 which is an upper pressure receiving chamber 8 on the side of the elastic support 3 and a lower equilibrium chamber on the side of the diaphragm 5. Partition bodies 10 and 10 are umbrella-shaped members arranged in the pressure receiving chamber 8. The configuration of each component will be described below.

The first mounting member 1 is formed by integrating a bottomed cylinder 11, a plate portion 12, and a mounting bolt 13 protruding upward from the plate portion 12 along the cylinder axis X. There is a position on the upper end opening side of the cylinder member 21 described later, and is arranged on the cylinder axis X. The mounting bolts 13 are connected to the vibration source side, for example, the engine side.

The second mounting member 2 is constructed by integrally connecting a tubular member 21 that is opened vertically and a bottomed tubular member 22 that closes the lower end opening side of the tubular member 21. . That is, a bent edge 22a that is bent to the outer peripheral side is formed on the upper end of the bottomed tubular member 22, while a recessed stepped portion 21a formed on the inner peripheral surface of the lower end of the tubular member 21.
With the bent edge 22a fitted in the
The caulking portion 21b is formed so as to sandwich the upper and lower sides from each other, and the two portions 21 and 22 are integrated with each other. Then, it is adapted to be connected to a vibration receiving portion side, for example, a bracket of a vehicle body by a mounting bolt 23 projecting downward from the bottomed tubular member 22 along the tubular axis X.

The elastic bearing member 3 is the first mounting member 1
Also, it is formed by integral vulcanization molding with the upper end opening of the tubular member 21 of the second mounting member 2, and connects both mounting members 1, 2 to each other. In addition, a thin rubber layer 3a covering the inner peripheral surface reaching the concave step portion 21a on the lower end side of the tubular member 21 is integrally vulcanized and bonded to the elastic support body 3. In addition to the bent edge 12a, the flange portion of the partition body 7 and the outer peripheral portion of the diaphragm 5 are overlapped with each other between the rubber thin layer 3a of the recessed step portion 21a and the caulked portion 21b. The partition 7 and the diaphragm 5 are mounted on the second mounting member 2 by being sandwiched between them.

The partition body 7 is a disc-shaped member made of synthetic resin or metal so as to have rigidity such that it does not bend even if the internal pressure of the pressure receiving chamber 8 increases due to the deformation of the elastic support body 3. is there. An orifice 14 that penetrates vertically is integrally formed in the partition 7, and the pressure receiving chamber 8 and the equilibrium chamber 9 are communicated with each other by the orifice 14 so that the pressure receiving chamber 8 and the liquid 6 in the equilibrium chamber 9 are separated from each other. This orifice 14
Through which they can flow. The length and opening area of the orifice 14 are set so as to dampen vibrations in a predetermined low frequency range input in the vertical direction due to liquid column resonance when the liquid 6 flows.

The umbrella-shaped member 10 is the first attachment member 1 described above.
Is fixed to the bottomed cylinder 11 and extends downward from the bottomed cylinder 11 along the cylinder axis X into the pressure receiving chamber 8.
And the umbrella portion 102 fixed to the lower end of the support rod 101 and expanding in the outer peripheral direction which is a direction orthogonal to the vibration input direction.
And The diameter of the umbrella portion 102 is set so that a gap 15 having a predetermined width is formed in an annular shape between the outer peripheral portion of the umbrella portion 102 and the rubber thin layer 3a forming the inner surface of the pressure receiving chamber 8. The umbrella-shaped member 10 allows the pressure receiving chamber 8
Is partitioned into a lower main chamber portion 8a and an upper sub chamber portion 8b facing the lower surface 3b of the elastic bearing body 3, and the main chamber portion 8a and the sub chamber portion 8b pass through the gap 10 to store the liquid 6 Flow is possible. The width of the gap 15 is the first or the second.
The main chamber portion 8a passes through the gap 15 within a range that does not cause interference between the umbrella portion 102 and the rubber thin layer 3a even if vibration or impact is input from the mounting members 1 and 2 in a direction other than the vertical direction. The size is set so that a predetermined equivalent mass can be realized by the liquid 6 flowing between the sub chamber 8b and the sub chamber 8b.

In such a structure, the sub chamber portion 8b
A predetermined amount of air 16 as a gas (hereinafter referred to as enclosed air) is enclosed at the top of the inside. The enclosed amount of the enclosed air 16 is basically related to the expansion spring constant of the elastic support body 3, and the expansion spring is the expansion spring due to the volume change when the enclosed air 16 receives a compressive force. ½ or less, preferably ½ to ¼. Then, the enclosed amount may be determined in accordance with a requirement based on a vehicle to which the liquid-filled engine mount is applied, an engine to be supported, and a size of the liquid-filled engine mount. In the case of the size range that is normally used for the above engine, it may be set in the range of 0.5 cc to 10 cc. In this case, a particularly preferable range of the enclosed amount is 1.5 cc.
~ 3 cc.

Next, a method for manufacturing the liquid-filled type engine mount having the above-described structure, particularly, a method for filling the filled air 16 will be described with reference to FIG.
It will be described based on.

First, the umbrella-shaped member 10 and the first mounting member 1 are connected to each other, and the elastic support body 3 is integrally vulcanized and molded by using the first mounting member 1 and the tubular member 21 as insert materials. Next, the opening end edge 21c of the tubular member 21 on the side of the first mounting member 1 is placed on the surface plate 17 in a state where the first mounting member 1 is on the lower side of this molded product, The mounting member 1 is pulled and displaced to a predetermined position below. This allows
The elastic support 3 is pulled and extends, and finally the umbrella-shaped member 1
The outer peripheral portion 102a of the umbrella portion 102 of 0 is pressed against the lower surface 3b which is the inner surface of the elastic support body 3 and comes into close contact therewith. Then, by closely contacting each other, a closed space 18 is formed which is defined by the umbrella portion 102 and the lower surface 3b of the elastic support body 3 and in which the enclosed air 16 is sealed. At this time, if the closed space 18 is formed to have a volume equal to a predetermined filled amount of the filled air 16, the closed space 1 is as described above.
Although it is sufficient to seal the enclosed air 16 in all of the eight, if the enclosed space 18 is formed so as to have a volume larger than the enclosed amount as shown in FIG. Liquid 6a is injected in advance in the closed space 18
Should be formed.

Thereafter, the liquid 6 is injected from above the tubular member 21, and after the injection is completed, the partition 7, the diaphragm 5, and
The bottomed tubular member 22 is sequentially fitted into the concave step portion 21a, and these are caulked by the caulking portion 21b. After that, the enclosed air 16 is enclosed in the top of the sub chamber 8b (see FIG. 1) by reversing the vertical direction.

Regarding the assembling of the partition 7 and the like, the molded product after the formation of the closed space 18 is completely immersed in the tank filled with the liquid 6 and the inside of the tubular member 21 is filled with the liquid 6. If the liquid chamber 4 is filled with the liquid 6 and the assembly is performed in the immersed state, the liquid chamber 4 can be easily and reliably filled with the liquid 6. Further, the amount of the enclosed air 16 in the closed space 8 may be increased or decreased by using a syringe or a cylinder through an injection needle or the like that penetrates the elastic support member 3 and is pierced. As a result, the enclosed air 16
Can be more surely made to have a predetermined enclosed amount.

Next, the operation and effect of the above configuration will be described.

First mounting member 1 side or second mounting member 2 side
When a vibration in a low frequency range is input to the elastic support body 3 in the vertical direction from the side, the elastic support body 3 is deflected in the vertical direction, and the liquid 6 in the pressure receiving chamber 8 flows through the orifice 14 to the equilibrium chamber 9. To do. Then, the orifice 14 for the liquid 6
The input column vibration is attenuated by the liquid column resonance via the. When the input vibration is on the higher frequency side and the orifice 14 locks in a clogged state in which the liquid 6 does not substantially flow through the orifice 14, the umbrella shape accompanying the vibration input in the high frequency region is generated. The displacement of the member 10 in the same phase as the input vibration causes a flow of the liquid 6 between the main chamber portion 8a and the sub chamber portion 8b of the pressure receiving chamber 8 through the gap 15, thereby preventing the reduction of the dynamic spring constant. Shaking is achieved.

At this time, the internal pressure of the sub-chamber 8b rises due to the inflow of the liquid 6 to the sub-chamber 8b side, and the enclosed air 16 is compressed in response to this rise of the internal pressure to cause a volume change. Since the volume of the enclosed air 16 is absorbed by the volume spring, the internal pressure is reduced, and the expansion spring exerted by the elastic support 3 is apparently lowered. Therefore, as shown in FIG. 4, the notch frequency H2 is the frequency H1 when the conventional enclosed air 16 is not provided.
It is possible to shift to a lower frequency side.

Further, according to the above-described manufacturing method, the predetermined amount of the enclosed air 16 can be surely enclosed in the top portion of the sub chamber portion 8b of the pressure receiving chamber 8. Moreover, by adjusting the amount of the liquid 6a to be injected in advance, the enclosed air 16
The amount of can be adjusted.

<Second Embodiment> FIG. 3 shows a method of manufacturing a liquid filled engine mount according to a second embodiment of the present invention. In the figure, reference numeral 10 'denotes an umbrella-shaped member having an umbrella portion 102' having a shape different from that of the first embodiment, and the second embodiment has another configuration except that the shape of the umbrella-shaped member 10 'is different. Are all the same as those of the first embodiment.

That is, the umbrella portion 10 of the umbrella-shaped member 10 '.
2'is formed with a recess 103 having a predetermined volume and surrounding the support rod 101 and opening to the side of the elastic support 3 at the inner peripheral side. The volume of the recess 103 is set to be equal to the amount of the filled air 16.

The method of filling the enclosed air 16 in the case of the second embodiment is the same as the case of the first embodiment in which the first mounting member 1 to which the umbrella-shaped member 10 'is mounted and the tubular member 21 are mounted. To the elastic member 3 by integral vulcanization molding, and the molded product is horizontally fixed so that the first mounting member 1 is on the lower side. In this state (the state shown in FIG. 3), the tubular member 21
Liquid 6 is injected from above. Thereby, the recess 1
The liquid 6 is filled in the tubular member 21 with the enclosed air 16 being confined in 03. Then, as in the case of the first embodiment, the partition body 7, the diaphragm 5, and the bottomed tubular member 22 are sequentially fitted in the concave step portion 21a, and these are caulked by the caulking portion 21b. After that, the enclosed air 16 is enclosed in the top of the sub chamber 8b (see FIG. 1) by reversing the vertical direction. In addition, as described in the case of the manufacturing method of the first embodiment, the injection of the liquid 6 and the assembling of the partition body 7 may be performed in a tank filled with the liquid 6 as described above. You may make it increase / decrease adjustment of the enclosed amount with a needle.

In this case, since the step of forming the closed space 18 (see FIG. 2) is omitted, the filling air 16 can be filled more easily than in the case of the manufacturing method according to the first embodiment.

<Third Embodiment> FIG. 5 shows a liquid-sealed engine mount according to a third embodiment of the present invention. In FIG. 5, reference numeral 7'denotes a partition body having an orifice 14 'and a rattling mechanism 19. is there. Since the other configurations in the third exemplary embodiment are the same as those in the first exemplary embodiment, the same components are designated by the same reference numerals and detailed description thereof will be omitted.

The partition 7'has communication holes 190, 190, ... For both the pressure receiving chamber 8 and the equilibrium chamber 9 inside the central portion.
A storage chamber 191 formed so as to communicate with each other via an opening, and an annular orifice 14 'formed inside the outer peripheral portion are integrally formed. Then, the accommodation chamber 191
A movable plate 192 made of rubber or synthetic resin is accommodated therein so that it can be slightly displaced in the vertical direction, and the movable plate 192 and the accommodating chamber 191 constitute the above-mentioned mechanism 19.

The orifice 14 'is formed on the outer peripheral portion of the partition 7'in a C-shaped area in plan view. One end 14a 'of the orifice 14' is opened to the pressure receiving chamber 8 and the other end 14b 'is opened to the equilibrium chamber 9 so that the liquid 6 in the pressure receiving chamber 8 and the equilibrium chamber 9 pass through the orifice 14'. The orifice 14 'has a length, a cross-sectional area, etc. so as to dampen vibrations in a predetermined low frequency range input in the vertical direction due to liquid column resonance when the liquid 6 flows. Is set. Further, the rattling mechanism 19 receives the fluctuation of the hydraulic pressure from the pressure receiving chamber 8 and causes the movable plate 192 to be slightly displaced to change the volume of the pressure receiving chamber 8. The pressure compensation chamber 8 is volume-compensated, that is, the volume thereof is changed with respect to medium-to-high-frequency vibrations that cause a jam in a locked state.

In addition, in the case of the third embodiment, the same operation and effect as described in the first embodiment can be obtained by the enclosed air 16 in the umbrella-shaped member 10 and the sub-chamber portion 8b, and the mechanism described above is also provided. The following effects due to 19 can be obtained. That is, when the vibration input in the high frequency range causes the orifice 14 ′ to be clogged, the movable plate 192 is slightly displaced to the equilibrium chamber 9 side due to the increase in the hydraulic pressure of the pressure receiving chamber 8, so that the pressure receiving chamber 8 The volume of can be changed. As a result, the rise in the internal pressure of the pressure receiving chamber 8 is suppressed, and the first
It is possible to reduce the vibration transmissibility in a wider frequency range than in the case of the embodiment.

<Other Embodiments> The present invention is based on the first embodiment.
The present invention is not limited to the third embodiment and includes various other embodiments. That is, the first
~ In the third embodiment, air is used as the gas,
The gas to be filled is not limited to this, and any gas that does not dissolve in the liquid 6 may be used. For example, nitrogen gas or an inert gas may be used. In this case, before forming the closed space 18 in FIG.
Prior to the injection, the inside of the tubular member 21, in particular, the vicinity of the umbrella-shaped member 10 may be placed under an atmosphere of the above-mentioned nitrogen gas or the like, whereby the top portion of the sub-chamber portion 8b of each pressure receiving chamber 8 The nitrogen gas or the like can be enclosed in the.

[0045]

As described above, according to the liquid-filled engine mount according to the first aspect of the present invention, vibrations in the high frequency range can be generated while the expansion spring constant of the elastic support is set to the originally required value. When input, it is possible to obtain the same effect as that when the expansion spring constant is lowered by the volume spring of the enclosed air. Therefore, even if the gap between the umbrella-shaped members is dimensioned so that there is no risk of interference, the notch frequency when vibration in the high frequency range is input can be tuned to a frequency side lower than that of the related art.

According to the second aspect of the invention, it is possible to specifically specify a preferable amount of the gas to be enclosed in the invention according to the first aspect, and the enclosed body can provide an elastic support at the time of vibration input in a high frequency range. Expanded spring constant of 1/3 to 1
The same effect as the reduction to / 5 can be obtained, which ensures the predetermined damping characteristics required for the vehicle,
It is possible to secure a predetermined reduction of the dynamic spring constant.

According to the third aspect of the invention, the applicable range can be specifically specified as the amount of the gas enclosed in the first aspect of the invention, and a predetermined damping characteristic required for the vehicle can be secured. At the same time, it is possible to secure a predetermined reduction of the dynamic spring constant.

According to the invention described in claim 4, it is possible to specify a more preferable range as the range of the enclosed amount of the gas in the invention described in claim 3, whereby the damping characteristic is preferable in terms of vibration damping in the vehicle. While it is possible to obtain a tan δ value of 0.6 or more, a predetermined reduction of the dynamic spring constant can be achieved.

According to the fifth aspect of the invention, in addition to the effect of the first aspect of the invention, when the vibration is input in the high frequency range, the volume variation of the pressure receiving chamber due to the rattling mechanism causes the volumetric spring of the enclosed gas. It is possible to further reduce the dynamic spring constant on the frequency side lower than that of the case.
It is possible to reduce the vibration transmissibility in a wider frequency range.

According to the method of manufacturing the liquid-filled engine mount according to the sixth aspect of the invention, a predetermined amount of gas is stored in the sub-chamber part on the elastic bearing side in the pressure receiving chamber and above the umbrella-shaped member. It is possible to reliably manufacture the sealed liquid-filled engine mount according to the first aspect of the invention.
Moreover, it is possible to reliably enclose a predetermined amount of gas.

Further, according to the method of manufacturing the liquid-sealed engine mount according to the invention of claim 7, a predetermined amount of gas is contained in the sub-chamber portion on the elastic bearing side in the pressure receiving chamber and above the umbrella-shaped member. The encapsulated liquid-filled engine mount according to the first aspect of the invention can be reliably manufactured by a method different from that of the sixth aspect of the invention. Moreover, it is possible to surely perform the enclosing of a predetermined amount of gas more easily than the manufacturing method according to the sixth aspect of the invention.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a gas filling method according to the first embodiment.

FIG. 3 is a cross-sectional view showing a gas filling method of the second embodiment.

FIG. 4 is a relationship diagram of absolute spring constant and frequency for the present invention and a conventional example.

FIG. 5 is a cross-sectional view showing a third embodiment.

[Explanation of symbols]

 1 1st mounting member 2 2nd mounting member 3 Elastic support body 4 Liquid chamber 5 Diaphragm (elastic thin film member) 6 Liquid 7,7 'Partition body 8 Pressure receiving chamber 8a Main chamber part 8b Sub chamber part 9 Equilibrium chamber 10, 10' Umbrella-shaped member 14, 14 'Orifice 15 Gap 16 Air, enclosed air (gas) 18 Sealed space 19 Mechanism 21 Cylindrical member 103 Recess of umbrella-shaped member

Claims (7)

[Claims] 1. A pair of first and second mounting members, which are arranged apart from each other in a vibration input direction, an elastic support member connecting the pair of mounting members to each other, and the elastic support member. A liquid chamber in which a liquid is enclosed, a partition chamber which divides the liquid chamber into a pressure receiving chamber defined by the lower surface of the elastic support and an equilibrium chamber at least part of which is defined by an elastic thin film member , The vibration input direction such that a gap remains in the outer periphery at a position between the orifice that communicates the pressure receiving chamber and the equilibrium chamber with each other and the elastic bearing member and the partition member of the pressure receiving chamber that are supported by the first mounting member. In a liquid-sealed engine mount that includes an umbrella-shaped member that extends in a direction orthogonal to, and divides the pressure receiving chamber into a main chamber portion on the partition body side and a sub chamber portion on the elastic support body side, a specific amount in the sub chamber portion. The gas of Fluid-filled engine mount according to claim. 2. The amount of gas enclosed according to claim 1, wherein the volume spring of the enclosed gas is set in a range corresponding to 1/2 to 1/4 of the expansion spring of the elastic support. Liquid-filled engine mount featuring. 3. The liquid-filled engine mount according to claim 1, wherein the amount of enclosed gas is set in the range of 0.5 cc to 10 cc. 4. The liquid-filled engine mount according to claim 3, wherein the amount of enclosed gas is set in the range of 1.5 cc to 3 cc. 5. The volume of the pressure receiving chamber according to claim 1, wherein the partitioning body is disposed so as to face both the pressure receiving chamber and the equilibrium chamber, and is slightly displaced in response to a change in hydraulic pressure from the pressure receiving chamber. A liquid-filled engine mount characterized by having a mechanism for varying. 6. A pair of first and second mounting members, which are arranged apart from each other in the vibration input direction, an elastic support member connecting the pair of mounting members to each other, and the elastic support member. A liquid chamber in which a liquid is enclosed, a partition chamber which divides the liquid chamber into a pressure receiving chamber defined by the lower surface of the elastic support and an equilibrium chamber at least part of which is defined by an elastic thin film member An orifice that connects the pressure receiving chamber and the equilibrium chamber to each other, and a position that is supported by the first mounting member and that extends between the elastic bearing member and the partition member of the pressure receiving chamber and that extends in a direction orthogonal to the vibration input direction. A method for manufacturing a liquid-sealed engine mount, comprising: an umbrella-shaped member that divides the pressure-receiving chamber into a main chamber portion on the partition body side and a sub-chamber portion on the elastic support body side, wherein a first mounting member to which the umbrella-shaped member is attached And part of the second mounting member The first opening of the first mounting member is arranged on the lower side, and the first mounting member is arranged on the upper side. By relatively moving the mounting member downward with respect to the tubular member, the outer peripheral portion of the umbrella-shaped member is brought into close contact with the inner surface of the elastic bearing member to form a sealed space between the umbrella-shaped member and the elastic bearing member. The method for producing a liquid-filled engine mount, characterized in that the liquid is injected from the other end opening portion of the tubular member. 7. A pair of first and second mounting members, which are arranged apart from each other in the vibration input direction, an elastic support member connecting the pair of mounting members to each other, and the elastic support member. A liquid chamber in which a liquid is enclosed, a partition chamber which divides the liquid chamber into a pressure receiving chamber defined by the lower surface of the elastic support and an equilibrium chamber at least part of which is defined by an elastic thin film member An orifice that connects the pressure receiving chamber and the equilibrium chamber to each other, and a position that is supported by the first mounting member and that extends between the elastic bearing member and the partition member of the pressure receiving chamber and that extends in a direction orthogonal to the vibration input direction. In a method of manufacturing a liquid-sealed engine mount, comprising: an umbrella-shaped member that divides the pressure-receiving chamber into a main chamber portion on the partition body side and a sub-chamber portion on the elastic bearing body side, wherein the elastic bearing member is used as the umbrella-shaped member. The bullet in the part on the front side The first mounting member to which the umbrella-shaped member having the recess is formed and a part of the second mounting member are used. Is connected to the one end opening of the tubular member of both ends opening via an elastic support, and then the first mounting member is placed on the lower side and the tubular member is placed on the upper side. A method of manufacturing a liquid-filled engine mount, comprising injecting liquid from the other end opening of the tubular member.