JP3645954B2 - Liquid filled anti-vibration mount device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid-filled vibration-proof vibration formed by connecting an outer peripheral surface of an inner cylinder member disposed radially inward and an inner peripheral surface of an outer cylinder member disposed radially outward by an elastic body enclosing a liquid therein. It relates to a mounting device.
[0002]
[Prior art]
Such an anti-vibration mount device is already known, for example, from Japanese Patent Publication No. 6-94889 and Japanese Patent Application Laid-Open No. 60-245849.
[0003]
[Problems to be solved by the invention]
By the way, the conventional anti-vibration mount device adjusts the setting of the resonance frequency and the dynamic spring constant by changing the length and cross-sectional area of the orifice, but there is a problem that the adjustment is difficult and the cost is increased.
[0004]
The present invention has been made in view of the above-described circumstances, and an object thereof is to make it possible to easily adjust the frequency characteristics of a vibration-proof mount device.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention described in claim 1 is characterized in that liquid is contained inside the outer peripheral surface of the inner cylindrical member arranged on the inner side in the radial direction and the inner peripheral surface of the outer cylindrical member arranged on the outer side in the radial direction. in fluid-filled elastic mount device formed by connecting with encapsulated elastic body constitute the elastic member from the plurality of members, Rutotomoni with different materials of the plurality members to each other, either a high damping of the plurality of members It is composed of materials .
[0006]
In addition to the configuration of claim 1, the invention described in claim 2 includes a second elastic body that can be elastically deformed so that the elastic body can greatly contribute to the volume change of the liquid chamber, and the second elastic body. A first elastic body that forms a liquid chamber with the elastic body and is less likely to be deformed than the second elastic body. The first elastic body is made of a low damping material, and the second elastic body is made of high damping. In addition to the structure of claim 1, the invention described in claim 3 is characterized in that the elastic body has a first elasticity that causes surging in a region where the input frequency is relatively high. And a second elastic body that causes surging in a region where the input frequency is relatively low, wherein the first elastic body is composed of a low damping material and the second elastic body is composed of a high damping material. Furthermore, the invention described in claim 4 is In addition to the configuration of the Motomeko 2 or 3, the first elastic body made of natural rubber, and the second elastic body is characterized by consisting of butyl rubber.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings.
[0008]
1 to 15 show an embodiment of the present invention. FIG. 1 is a perspective view of a front subframe of an automobile, FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG. 1, and FIG. 4 is a sectional view taken along line 4-4 of FIG. 2, FIG. 5 is a sectional view taken along line 5-5 of FIG. 2, FIG. 6 is a partially broken perspective view of the vibration-proof mount, and FIG. FIG. 8 is an eight-direction view of FIG. 6, FIG. 9 is an explanatory diagram of the operation of the drainage passage, FIG. 10 is a diagram showing the first assembly process, and FIG. 11 is a portion 11A and a portion 11B of FIG. FIG. 12 is a diagram showing the second assembly process, FIG. 13 is a diagram showing the third assembly process, FIG. 14 is a graph showing changes in the dynamic spring constant due to compression of the second elastic body, and FIG. 15 is the second elasticity. It is a graph which shows the change of the dynamic spring constant by having used the high damping material for the body.
[0009]
As shown in FIG. 1, a front subframe SF of an automobile includes a front beam 1 extending in the left-right direction of the vehicle body, a left side beam 2 _L and a right side beam 2 _R extending rearward from the left and right ends of the front beam 1, The rear beam 3 connecting the rear ends of the left and right side beams 2 _L and 2 _R is formed in a substantially frame shape. An engine (not shown) is supported by left engine mount 4 _L and right engine mount 4 _R provided at the left and right ends of the rear beam 3 via mount brackets 5 _L and 5 _R, and the engine is provided at the left and right ends of the front beam 1. Further, the stoppers 6 and 6 (the right stopper 6 is not shown) are supported.
[0010]
The left side of the front sub-frame SF has a first anti-vibration mount M ₁ that fits into a cup-shaped holder 7 formed at the left end of the front beam 1, and two cup-shaped holders 8, 9 formed at the left end of the rear beam 3. second, it is supported by the left side frame F _L by the third elastic mount M _2, M ₃ which fits into. That is, first, second, third vibration damping mount M _1, M _2, M ₃ and the cup-shaped holder 7, 8, 9, co the lower surface of the left side frame F _L respectively by bolts 10 ... and nuts 11 ... It is tightened. At this time, the front ends of the plates 12 and 13 sandwiched between the first and third anti-vibration mounts M ₁ and M ₃ and the heads of the bolts 10 and 10 are respectively shown in the body frame not shown by the bolts 14 and 15. Combined with A washer 16 is sandwiched between the second vibration-proof mount M ₂ and the head of the bolt 10.
[0011]
Right portion of the front sub-frame SF is first, second, is supported by the right side frame F _R by a third vibration damping mount M _1, M _2, M ₃ (not shown) in the same manner as the left unit described above The Since all of the six anti-vibration mounts M ₁ have the same structure, the structure of the second anti-vibration mount M ₂ will be described as a representative of them.
[0012]
As shown in FIG. 2, a bolt 10 for fixing the vibration damping mount M ₂ to be fitted to the housing recess ₈₁ of the cup-shaped holder 8 which lower surface is open to the left side frame F _L is washer 16, vibration damping mount M ₂ , opening ₈₂ of the cup-shaped holder 8, an annular seal rubber 17, the bolt holes 18 ₁ of the left side frame F _L, the reinforcement collar 19, through the bolt holes 18 ₂ of the left side frame F _L, with the nut 11 Match.
[0013]
As is clear from FIGS. 3 to 8, the vibration-proof mount M ₂ includes a stepped cylindrical center pipe 21 having a bolt hole 21 ₁ through which the bolt 10 passes, and a lower small diameter of the center pipe 21. The inner periphery of the first elastic body 22 made of rubber is joined to the outer periphery of the upper small-diameter portion 21 ₃ and the large-diameter portion 21 ₄ excluding the portion 21 ₂ by baking. The first elastic body 22 is formed with a pair of orifices 22 ₁ , 22 ₁ having a lower end opened and a closed upper end in the axial direction with a phase difference of 180 ° in the circumferential direction, and the pair of orifices 22 ₁ , A pair of air chambers 22 ₂ and 22 ₂ having an upper end opened and a lower end closed are formed on the outer side in the radial direction of 22 _{1 in} the axial direction. A pair of diaphragms 22 ₃ and 22 _{3 that} are elastically deformable in the radial direction is formed between the orifices 22 ₁ and 22 ₁ and the air chambers 22 ₂ and 22 ₂ . The outer periphery of the first elastic body 22 is coupled to the inner periphery of the substantially cylindrical first collar 23 by baking.
[0014]
By the way, when an orifice is constituted by a gap between a plurality of members, an error may occur in the cross-sectional area of the orifice due to a shift in the relative position of the plurality of members. However, since the orifices 22 ₁ and 22 ₁ are formed only by the wall surface of the single first elastic body 22, there is a risk that an error in the cross-sectional area of the flow path due to a shift in the relative positions of a plurality of members or the like may occur. it can be without, to prevent the characteristic difference is generated between the vibration damping mount M ₂ individuals.
[0015]
A rubber second elastic body 26 is insert-molded so as to connect the lower end of the substantially cylindrical second collar 24 and the annular bush 25. The outer periphery of the first collar 23 is fitted to the inner periphery of the second collar 24, and the second collar 24 is in a state where the lower end of the first collar 23 is in contact with the step portion 24 ₁ of the second collar 24. The second collar 24 and the first collar 23 are integrally coupled by caulking the upper part of 24 inward and caulking the upper end downward (see caulking parts a ₁ and a ₂ ). The step portion 24 ₁ can be formed by drawing when the second collar 24 is manufactured. Further, the inner periphery of the bush 25 is integrally coupled to the outer periphery of the lower small diameter portion 21 ₂ of the center pipe 21 by press-fitting (see the press-fit portion b).
[0016]
When the second collar 24 and the first collar 23 are joined together as described above, and the bush 25 and the center pipe 21 are joined together, the lower end of the first elastic body 22 and the upper end of the second elastic body 26 are connected. there close contact, there annular liquid chamber 26 ₁ is defined in. The liquid chamber 26 ₁ and the orifices 22 ₁ , 22 ₁ are in communication with each other, and a sealed space in which liquid is sealed is formed by both. A main portion of the second elastic body 26 that connects the lower portion of the second collar 24 and the bush 25 constitutes a rubber portion 26 ₈ that can be displaced in the vertical direction, and this rubber portion 26 ₈ is the liquid chamber 26 ₁ . Define the bottom wall.
[0017]
Different materials having different loss factors are used for the first elastic body 22 and the second elastic body 26. That is, a low damping material (for example, natural rubber NR) having a small loss coefficient is used for the first elastic body 22, and a high damping material (for example, butyl rubber IIR) having a large loss coefficient is used for the second elastic body 26. Is done.
[0018]
The center pipe 21 and the bush 25 constitute an inner cylinder member of the present invention, and the first collar 23 and the second collar 24 constitute an outer cylinder member of the present invention.
[0019]
On the lower surface of the second elastic body 26, three leg portions 26 ₃ ... Having annular projections 26 ₂ ... Are projected in the middle, and these leg portions 26 ₃ . It fits into the individual locking holes 16 ₁ . When assembling the collar 16 to the vibration damping mount M _2, from the leg portion 26 ₃ ... in the fitted in the locking holes 16 ₁ ... Color 16 retained by an annular projection 26 ₂ ..., a vibration damping mount M ₂ Workability can be improved by temporarily assembling the collar 16.
[0020]
As is apparent when comparing FIGS. 2 and 3, together with the seal lip 22 ₄ extending upwardly is protruded from the upper end of the center pipe 21 to the upper end of the first elastic member 22, the lower end of the second elastic member 26 sealing lip 26 ₄ extending downward is protruded from the lower end of center pipe 21 into. In assembled state shown in FIG. 3, the sealing lip 22 ₄ of the first elastic member 22 exerts a sealing effect elastically brought into contact with the lower surface of the left side frame F _L, also the sealing lip 26 of the second elastic member 26 ₄ elastically contacts the upper surface of the washer 16 and exhibits a sealing effect.
[0021]
And sealing effect of the sealing lip 22 ₄ of the first elastic member 22 abutting against the lower surface of the left side frame F _L, by the sealing action of the sealing lip 26 ₄ of the second elastic member 26 which comes into contact with the upper surface of the washer 16, the center pipe 21 only either compressed sealing lip 22 _4, 26 ₄ left side frame F _L and washers improved durability against corrosion is prevented from muddy water or the like from intruding between the bolt holes 21 ₁ and the bolt 10 of the The reaction force received from 16 urges the center pipe 21 and the bush 25 in the direction in which they are press-fitted together, so that the press-fitting portion b is prevented from loosening. In addition, since the seal lips 22 ₄ and 26 ₄ are formed integrally with the first and second elastic bodies 22 and 26, a special seal member is not required and the number of parts is reduced.
[0022]
On the second elastic body 26 covering the outer periphery of the second collar 24, six annular ribs 26 ₅ ... Having a triangular cross-sectional shape are projected. The annular ribs 26 ₅ ... Lack a portion corresponding to the outside in the radial direction of the air chambers 22 ₂ , 22 ₂ , and two drain grooves 26 ₆ , 26 ₆ extending in the axial direction are formed there. Annular rib 26 ₅ ..., when is fitted by press-fitting the vibration damping mount M ₂ in housing recess ₈₁ of the cup-shaped holder 8, a function to facilitate the press-fitting operation to reduce the area of the sliding portion.
[0023]
As shown in FIG. 9, even if muddy water or the like that has passed through the seal rubber 17 for some reason enters between the outer periphery of the second collar 24 and the inner periphery of the cup-shaped holder 8, the muddy water or the like remains in the annular rib 26 _5. The water flows downward through the drain grooves 26 ₆ , 26 _6, and is discharged to the outside through the three notches 26 ₇ formed on the lower upper surface of the second elastic body 26. This avoids the problem that muddy water or the like accumulates between the vibration-proof mount M and the cup-shaped holder 8 and rust is generated.
[0024]
Next, the assembly process of the vibration proof mount M ₂ will be described.
[0025]
First, as shown in FIG. 10, the first subassembly A _{1 in} which the center pipe 21, the first elastic body 22 and the first collar 23 are integrated, and the second collar 24, the second elastic body 26 and the bush 25 are integrated. The second subassembly A ₂ is assembled in advance. Then, in a state where the lower portion of the second sub-assembly A ₂ is fixed in the jig 28, by press-fitting the first subassembly A ₁ as the upper arrow 29 ... of, fitted to the second sub-assembly A ₂ .
[0026]
As is clear from FIGS. 11 (A) and 11 (B) showing details of the 11A portion and 11B portion of FIG. 10, the lip L ₁ and L ₂ are provided on the second elastic body 26 of the second subassembly A ₂ . The lips L ₁ , L ₂ are in contact with the first subassembly A ₁ that is press-fitted from above, and are sealed so that the liquid inside does not leak. The fitting process of the first and second subassemblies A ₁ and A ₂ is performed in the liquid, but before the lip L ₁ abuts on the first subassembly A ₁ , an excess of the liquid to be sealed Is discharged to the outside through a minute gap between the first collar 23 and the second collar 24 (see arrows 30 ₁ , 30 ₂ , 30 _{3 in} FIG. 12).
[0027]
Further, at this time, the first and second collars 23 are positioned by the lower end of the first collar 23 coming into contact with the step portion 24 ₁ formed in the middle of the second collar 24. Since the stepped portion 24 ₁ can be processed at the same time when the substantially cylindrical second collar 24 is formed by drawing, a special processing step is not required and the processing cost can be reduced.
[0028]
Subsequently, as shown in FIG. 13, the first and second collars 23 and 24 are formed by caulking the upper portion of the second collar 24 radially inward in the caulking portion a ₁ and downward in the caulking portion a ₂ . Connect together. At this time, since the relative positions of the first and second collars 23 and 24 are surely regulated by the step portion 24 _1, there is a possibility that the first and second collars 23 and 24 may be displaced due to a caulking process load. And easy and precise assembly is possible.
[0029]
After the first and second subassemblies A ₁ and A ₂ are fitted, the upper portion of the bush 25 is fixed on the upper portion of the lower small diameter portion 21 ₂ of the center pipe 21, so that the second collar 24 and the bush 25 Is shorter than the natural state (see e in FIG. 10) (see f in FIG. 13). This indicates that the mount M ₂ is raised assembled while applying the vertical given load to the rubber portion 26 ₈ of the second elastic member 26. Therefore, the thickness in the vertical direction of the rubber portion 26 ₈ is increased, which contributes the spring constant is increased to increase or decrease the liquid chamber volume.
[0030]
Next, the operation of the vibration proof mount M ₂ having the above-described configuration will be described.
[0031]
The characteristics of the orifice vibration system of the vibration isolating mount M ₂ are greatly influenced by the springs of the diaphragms 22 ₃ and 22 ₃ formed on the first elastic body 22 and the rubber portion 26 formed on the second elastic body 26. ₈ springs (springs in the direction of expansion and contraction of the liquid chamber) and the mass of the liquid in the orifices 22 ₁ and 22 ₁ . Focusing on the liquid chamber 26 ₁ which is defined by the first elastic body 22 and the second elastic body 26, first elastic body 22 constituting the upper wall in order to not easily deformed thickness of the vertical direction is extremely large , to contribute significantly to the volume change of the liquid chamber 26 ₁ is a rubber section 26 ₈ of the liquid chamber bulging direction and compression direction of the deformation of the second elastic member 26 constituting the bottom wall of the liquid chamber 26 _1. Accordingly, the material of the second elastic body 26 constituting the rubber portion 26 ₈ is extremely important. By using a high damping material for the second elastic body 26, the transmission force of the vibration isolating mount M ₂ at the time of resonance is reduced. In addition, the durability of the diaphragms 22 ₃ and 22 ₃ can be improved.
[0032]
When this will be described in more detail with reference to FIG. 6, when the downward load F to the center pipe 21 of the vibration damping mount M ₂ is applied by the relative movement between the sub-frame SF and the left side frame F _L, the load F is the diaphragm 22 _3, 22 ₃ as a load f ₁ transmitted to transmitted to the second collar 24, and is transmitted as a load f ₂ transmitted through the rubber portion 26 ₈ in the second collar 24. When the volume of the liquid chamber 26 ₁ is increased as the rubber portion 26 ₈ is deformed downward, and the liquid in the orifices 22 ₁ and 22 ₁ moves downward slightly after the expansion of the volume (ie, when the slightly lower input frequency than the resonance frequency), load is applied f _3, f ₄ and negative pressure is generated in the liquid chamber 26 ₁ into the upper wall and lower wall of the liquid chamber 26 _1. Thus, the upward load f ₄ acts to cancel the downward loads f ₁ , f ₂ , and f _3, thereby reducing the transmission of the load F from the center pipe 21 to the second collar 24.
[0033]
Now, in order to generate efficient negative pressure in the liquid chamber 26 _1, than the rubber portion 26 ₈ that faces the liquid chamber 26 ₁ will in easily upwardly bent, with the center pipe 21 without being flexed upwards downwards Therefore, the second elastic body 26 is made of a high damping material that hardly deforms due to hydraulic pressure. As a result, the dynamic spring constant can be reduced, and it is possible to obtain a high-performance anti-vibration mount M _{2 in} which vibration is hardly transmitted.
[0034]
Since the first elastic body 22 and the second elastic body 26 have different shapes, the first elastic body 22 is in a region where the input frequency is relatively high, and the second elastic body 26 has an input frequency as shown in FIG. Surging occurs in a relatively low region, and the dynamic spring constant rapidly increases in these regions, resulting in a decrease in performance. Therefore, by using a high damping material for the second elastic body 26, it is possible to minimize the deterioration of the dynamic spring constant in the target frequency region as indicated by the broken line. In particular, since the surging frequency region of the second elastic body 26 having a large radial thickness is a region commonly used in vehicles, it contributes to the improvement of noise vibration performance by suppressing the deterioration of the dynamic spring constant in the region. Can do.
[0035]
Although in this embodiment uses a high damping material to the second elastic member 26, which contributes to the volume change of the liquid chamber of the rubber portion 26 ₈ with respect to the spring constant of the diaphragm 22 _3, 22 ₃ spring This is because the constant is several times larger.
[0036]
Also even when the center pipe 21 of the vibration damping mount M ₂ is upward load F 'acts by the relative movement between the sub-frame SF and the left side frame F _L, the deformation occurs hardly high damping material to the second elastic member 26 by using, it is possible to efficiently generate a positive pressure in the liquid chamber 26 ₁ to reduce the transmission of the upward load F 'in the orifice effect.
[0037]
Furthermore, when the volume of the liquid chamber 26 ₁ expands or contracts, if a low-damping material that easily deforms is used for the second elastic body 26, the rubber portion 26 ₈ urges the liquid in the orifices 22 ₁ and 22 ₁ . Since it is extruded or pulled in well, the amount of deformation of the diaphragms 22 ₃ and 22 ₃ having a small wall thickness may increase and the durability may be reduced. However, the use of a high damping material for the second elastic body 26 eliminates the above problem.
[0038]
As described above, by using different materials having different loss coefficients for the first elastic body 22 and the second elastic body 26, the dynamic spring constant in the target input frequency region can be arbitrarily tuned. .
[0039]
Next, the effect of increasing the spring constant of the rubber portion 26 ₈ of the second elastic member 26 by press-fitting the bush 25 in the center pipe 21.
[0040]
The resonance frequency f by the orifice portion of the vibration damping mount M ₂ are orifices 22 _1, 22 liquid mass in _one and m, orifices 22 _1, 22 first elastic member 22 and the second elastic member acting on the liquid in the ₁ If the total spring constant of 26 is k,
f = (1 / 2π) × (k / m) ^1/2
Given in. Therefore, by increasing the spring constant of the rubber portion 26 ₈ of the second elastic member 26 associated with the press-fitting of the bushing 25, the higher side than the input frequency range in which the resonance frequency f a spring constant k of the total is increased is generally used Therefore, it is possible to increase the ride comfort by expanding the vibration isolation region in the input frequency region (see FIG. 15). Moreover, the spring constant can be easily adjusted by simply changing the shape of the second elastic body 26 before assembly and changing the compression amount when the bush 25 is press-fitted without using a material having a particularly high spring constant. So it is very low cost.
[0041]
Further, the center pipe 21 is urged downward and the first and second collars 23 and 24 are urged upward by the elastic force of the compressed second elastic body 26 to restore the free state (see FIG. 13 (see arrow A and arrow B), a preload in the compression direction can be applied to the diaphragms 22 ₃ and 22 ₃ of the first elastic body 22. As a result, the maximum amount of expansion when the diaphragms 22 ₃ and 22 ₃ are expanded is suppressed, and the durability of the diaphragms 22 ₃ and 22 ₃ is improved.
[0042]
As mentioned above, although the Example of this invention was explained in full detail, this invention can perform a various design change in the range which does not deviate from the summary.
[0043]
For example, in the embodiment, the elastic body is composed of two members, ie, the first elastic body 22 and the second elastic body 26, but it is also possible to form this with three or more members.
[0044]
【The invention's effect】
As described above, according to the present invention, since the elastic body is composed of a plurality of members and the materials of the plurality of members are different from each other, the dynamic spring constant at each surging frequency of the plurality of members can be arbitrarily tuned. In addition, since it is not necessary to change the shape of the elastic body during tuning, it can be realized at low cost. In addition, since any of the plurality of members is made of a high damping material, the transmission of vibration can be reduced by reducing the dynamic spring constant in the target frequency region.
[0045]
In particular, according to the invention of claim 2, since the high damping material is used for the second elastic body that can be elastically deformed so as to greatly contribute to the volume change of the liquid chamber among the elastic bodies, vibration isolation during resonance is achieved. The transmission force of the mount can be reduced and the durability can be improved.
Further, due to the difference in shape between the first elastic body and the second elastic body, surging occurs in the region where the first elastic body is relatively high in the input frequency and in the region where the second elastic body is relatively low in the input frequency. In particular, in the invention of claim 3, by using a high damping material for the second elastic body, it becomes possible to minimize the deterioration of the dynamic spring constant in the target frequency region. When the surging frequency region is a region that is regularly used in the vehicle, it is possible to contribute to the improvement of the noise vibration performance by suppressing the deterioration of the dynamic spring constant in the region.
[Brief description of the drawings]
1 is a perspective view of a front subframe of an automobile. FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG. 1. FIG. 3 is a longitudinal sectional view of an anti-vibration mount. 5 is a sectional view taken along line 5-5 in FIG. 2. FIG. 6 is a partially broken perspective view of the vibration isolating mount. FIG. 7 is a view in the direction of arrow 7 in FIG. 9 is a diagram for explaining the operation of the drainage passage. FIG. 10 is a diagram showing a first assembly process. FIG. 11 is an enlarged view of a portion 11A and 11B in FIG. FIG. 14 is a graph showing a change in the dynamic spring constant due to compression of the second elastic body. FIG. 15 is a graph showing a change in the dynamic spring constant due to the use of a high damping material for the second elastic body. Graph to show 【Explanation of symbols】
21 Center pipe (inner cylinder member)
22 1st elastic body (elastic body)
23 First collar (outer cylinder member)
24 Second collar (outer cylinder member)
25 Bush (Inner cylinder member)
26 Second elastic body (elastic body)

Claims (4)

An inner peripheral surface of the outer circumferential surface and a radially arranged outside the outer tubular member (23, 24) of the tubular member (21, 25) among which is disposed radially inward, liquid chamber enclosing the liquid inside (26 ₁ In a liquid-filled vibration-proof mount device connected by elastic bodies (22, 26) having
It said elastic body (22, 26) composed of a plurality of members, Rutotomoni with different materials of the plurality members to each other, characterized by being configured to one of the plurality of members with a high damping material, fluid-filled Anti-vibration mounting device. The elastic body has a liquid chamber (26 ) between the second elastic body (26) and the second elastic body (26) which can be elastically deformed so as to greatly contribute to the volume change of the liquid chamber (26 ₁ ). ₁ ), the first elastic body (22) which is less deformable than the second elastic body (26), and the first elastic body (22) is made of the low damping material and the second elastic body. The liquid-filled vibration-proof mount device according to claim 1, wherein (26) is made of a high damping material . The elastic body includes a first elastic body (22) that generates surging in a region where the input frequency is relatively high, and a second elastic body (26) that generates surging in a region where the input frequency is relatively low. The liquid-filled vibration-proof mount device according to claim 1, wherein the elastic body (22) is composed of a low damping material, and the second elastic body (26) is composed of a high damping material. The liquid-filled vibration-proof mount device according to claim 2 or 3, wherein the first elastic body (22) is made of natural rubber and the second elastic body (26) is made of butyl rubber.

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