JP2004069038A - Suspension type liquid seal engine mount - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suspension type liquid seal engine mount capable of achieving space saving effect for installation space, and achieving favorable vibration reducing effect. <P>SOLUTION: This device is composed of a first installation board 1 of a rectangular form having an insertion hole 11 at a center part for a suspension shaft member 5 to be inserted and disposed, a second installation board 2 of a rectangular form, disposed roughly in parallel to the first installation board 1 at a distance from it, and having an installation hole 21 for one end part of the suspension shaft member 5 to be installed at a center, a rubber elastic body 3 opened on the side of the second installation board 2, and having a first and a second recessed parts 33 and 34 disposed in parallel on both sides of the center hole 31 outward from the side of the center hole 31, and a plate-shaped cover member 4 covering the opening of the first and the second recessed parts 33 and 34, and forming a main liquid chamber 41 and an auxiliary liquid chamber 42 enclosing liquid L, and communicated with each other by an orifice passage 43. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a suspension-type liquid-sealed engine mount suitably used as a liquid-sealed engine mount for supporting a vehicle body frame in a state where a power unit mounted on an automobile is suspended.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, when a power unit mounted on an automobile is mounted on a vehicle body frame, the liquid ring engine is mounted so as to be interposed between the power unit and the vehicle body frame to prevent or reduce transmission of vibration between the two. A mount is used. This liquid ring engine mount utilizes a vibration reduction effect exerted based on a flow action of a liquid sealed in a rubber elastic body, and is generally used for any of a power unit and a body frame to be vibration-isolated. A first mounting member fixed to one of the two, a second mounting member fixed to one of the other, and a rubber elasticity interposed between the first mounting member and the second mounting member to integrally connect the two. And a plurality of liquid chambers filled with liquid and communicated with each other through an orifice passage (for example, Japanese Patent Application Laid-Open Nos. 9-79306 and 9-196109). No.).
[0003]
When vibration in a high frequency region generated from an engine or the like is input to such a liquid-tight engine mount, the vibration is effectively absorbed by the elastic deformation of the rubber elastic body. Also, when vibrations in a low frequency region such as an engine shake are input, the liquid column resonance action of the liquid flowing through the orifice passage is based on the change in pressure and volume in each liquid chamber due to the elastic deformation of the rubber elastic body. Thereby, the vibration is effectively absorbed.
[0004]
The above-mentioned liquid-tight engine mount is usually mounted so that the power unit is mounted on the vehicle body frame to support vibration isolation. However, when the power unit is suspended by a suspending member or the like, the vibration isolation is performed on the vehicle body frame. Also, a hanging type which is supported is known (for example, JP-A-4-334625, JP-A-6-54940, etc.).
[0005]
[Problems to be solved by the invention]
However, the above-mentioned conventional hanging liquid-seal engine mount has a disadvantage in that since it has a bowl-shaped overall shape and requires a large outer diameter, there are many design restrictions. Further, when the liquid ring engine mount is mounted, a large circular mounting space is required. However, in the layout of the vehicle, there are many rectangular spaces, and in the case of a bowl type, the outer diameter is determined according to the length of the shorter side of the rectangular space, so mounting in that space is impossible In some cases.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has an object to solve the problem of providing a suspended liquid-seal engine mount capable of saving a mounting space and obtaining a favorable vibration reduction effect. Should be an issue to be addressed.
[0007]
Means for Solving the Problems, Functions and Effects of the Invention
A suspension type liquid-sealed engine mount according to the invention as set forth in claim 1 which solves the above-mentioned problem has a rectangular insertion hole through which a suspension shaft member for suspending a power unit is inserted and disposed at a central portion thereof, and is provided on a vehicle body side. A first mounting board to be mounted, a second mounting board disposed substantially parallel to the first mounting board at a distance from the first mounting board, and having a rectangular mounting hole at one end of the hanging shaft member to be mounted at the center thereof; A central hole through which the hanging shaft member is inserted and arranged, and the first mounting substrate and the second mounting substrate, which are interposed between the first mounting substrate and the second mounting substrate; A rubber elastic body having a plurality of recesses which are opened on the second mounting substrate side and have a plurality of concave portions arranged in parallel in an outward direction from the center hole side at axially symmetric positions on both longitudinal sides of the central hole, The opening of each recess And the lid, between each of said recesses, the liquid is employed the means that is composed of a plate-shaped lid member to form a plurality of liquid chambers communicated with each other by an orifice passage is sealed.
[0008]
The suspended liquid-seal engine mount of the present invention has a structure in which a rubber elastic body is interposed between a rectangular first mounting substrate and a second mounting substrate which are arranged substantially in parallel, and has an overall rectangular shape. Is formed. Therefore, it can be mounted more advantageously than a conventional bowl-shaped liquid-sealed engine mount in a rectangular mounting space that frequently appears in a vehicle layout, and the design restrictions are greatly reduced. Therefore, according to the hanging-type liquid-sealed engine mount of the present invention, the mounting space can be saved.
[0009]
Further, in the suspension type liquid ring engine mount of the present invention, a plurality of liquid chambers formed inside the rubber elastic body are arranged in parallel from the center hole side to the outside in the axially symmetric positions on both sides in the longitudinal direction of the center hole. Are located. Therefore, in addition to when vibration is input in a direction in which the first mounting board and the second mounting board approach or separate from each other (vertical direction in the vehicle), vibration is input in a lateral direction in the longitudinal direction (front-back direction in the vehicle). At times, the pressure and the volume in each liquid chamber easily change, so that the liquid flows easily in the orifice passage communicating with each liquid chamber. As a result, not only the vertical vibration of the vehicle but also the longitudinal vibration can be reduced favorably, so that the performance can be improved.
[0010]
According to a second aspect of the present invention, the rubber wall defining the outermost liquid chamber of the rubber elastic body in the first aspect of the present invention has a spring rigidity greater than that of the partition wall that partitions the adjacent liquid chambers. It employs a means including a small diaphragm.
[0011]
According to this means, since the spring stiffness of the rubber wall that defines the outermost liquid chamber is set to be the smallest, the liquid liquid positioned outermost from the inner liquid chamber during vibration input is set. The liquid can efficiently and reliably flow toward the chamber.
[0012]
A third aspect of the present invention employs a means according to the second aspect of the present invention, wherein a partition wall that partitions each of the liquid chambers adjacent to the rubber elastic body has a smaller spring stiffness as it is located on the outer side. ing.
[0013]
That is, the present invention is applied to a case where three or more liquid chambers are arranged on one side in the longitudinal direction of the center hole, and according to this means, the liquid positioned inside when the vibration is input is provided. The liquid can efficiently and reliably flow from the chamber to the outermost liquid chamber.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
[Embodiment 1]
FIG. 1 is a longitudinal sectional view of a suspended liquid-sealed engine mount according to the present embodiment, and is a cross-sectional view taken along line II of FIG. 2, and FIG. 2 is a plan view of the liquid-sealed engine mount. 3 is a sectional view taken along line III-III of FIG. 2, FIG. 4 is a sectional view taken along line IV-IV of FIG. 2, and FIG. 5 is a sectional view taken along line VV of FIG. FIG. 6 is a plan view of a second mounting substrate of the suspension type liquid ring engine mount.
[0016]
As shown in FIGS. 1 to 5, the suspended liquid-sealed engine mount of the present embodiment has a first mounting substrate 1 which is rectangular and has an insertion hole 11 at the center thereof, and is spaced apart from the first mounting substrate 1. A second mounting substrate 2 which is disposed substantially parallel to each other, has a rectangular shape and has a mounting hole 21 at the center thereof, is interposed between the first mounting substrate 1 and the second mounting substrate 2, and the hanging shaft member 5 is inserted therethrough. A rubber elastic body 3 having a central hole 31 disposed therein, and first and second concave portions 33 and 34 disposed in parallel at axially symmetric positions on both sides of the central hole 31 and opening toward the first mounting board 1; The liquid L is sealed between the first and second recesses 33 and 34 by covering the openings of the first and second recesses 33 and 34, and the main liquid chamber 41 and the sub-liquid are communicated with each other by the orifice passage 43. And a plate-shaped lid member 4 that forms the chamber 42.
[0017]
The first mounting substrate 1 is formed of a steel plate into a rectangular shape, and has a circular insertion hole 11 in the center of which a suspension shaft member 5 for suspending the power unit is inserted. Around the insertion hole 11 of the first mounting board 1, a ring-shaped bent portion 12 bent so as to protrude outward (downward) is formed. Further, at both ends of the first mounting substrate 1, there are provided circular holes 13, 13 through which mounting bolts (not shown) are inserted when the first mounting substrate 1 is mounted on a vehicle body frame (not shown). I have.
[0018]
The second mounting substrate 2 is formed in a rectangular shape smaller than the first mounting substrate 1 by a steel plate, and is disposed substantially parallel to the first mounting substrate 1 at a distance. As shown in FIG. 6, a mounting hole 21 to which one end of the hanging shaft member 5 is mounted is provided in the center of the second mounting substrate 2. The first holes 22 and 22 and the second windows 23 and 23 are respectively provided at predetermined axially symmetric portions on both sides in the longitudinal direction of the mounting hole 21. In the portion between the first windows 22, 22, and the second windows 23, 23, there are provided stepped recesses 24, 24 formed so as to be recessed stepwise toward the first mounting substrate 1 side. . Further, caulking portions 25 for caulking and fixing the plate-shaped lid member 4 to be superimposed on the second mounting substrate 2 are provided at six locations on the outer peripheral portion of the second mounting substrate 2.
[0019]
The rubber elastic body 3 is interposed between the first mounting board 1 and the second mounting board 2 by integrally vulcanizing and molding a rubber material together with the first mounting board 1 and the second mounting board 2 to form a rectangular body. And are vulcanized and adhered to both to be integrally connected. In the center of the rubber elastic body 3, there is provided a center hole 31 through which the hanging shaft member 5 is inserted. A suitably large stopper clearance is formed between the wall surface of the central hole 31 and the suspension shaft member 5 inserted and arranged in the central hole 31. Both ends of the central hole 31 communicate with the insertion hole 11 of the first mounting board 1 and the mounting hole 21 of the second mounting board 2.
[0020]
The peripheral portion of the rubber elastic body 3 around the central hole 31 on the first mounting substrate 1 side protrudes outward (downward) of the first mounting substrate 1 so as to surround the bent portion 12 of the first mounting substrate 1. The projecting portion and the bent portion 12 constitute a stopper portion 32. The suspension shaft member 5 inserted through the center hole 31 is provided with a rebound stopper 51 arranged to face the stopper portion 32 in the axial direction.
[0021]
A first concave portion which is open to the second mounting substrate 2 side and is arranged in parallel from the central hole 31 side to the outside at a predetermined portion which is axially symmetric on both sides in the longitudinal direction of the central hole 31 of the rubber elastic body 3. 33, 33 and second concave portions 34, 34 are provided on each side in a pair. The first recesses 33, 33 open in the first windows 22, 22 of the second mounting board 2, and the second recesses 34, 34 open in the second windows 23, 23 of the second mounting board 2. The sizes of the openings of the first recesses 33, 33 and the second recesses 34, 34 are slightly smaller than those of the first window portions 22, 22, and the second window portions 23, 23. Seal lips 35 are provided around the recesses 33, 33 and the second recesses 34, 34, respectively.
[0022]
The first recesses 33, 33 and the second recesses 34, 34 are located between the first recesses 33, 33 and the second recesses 34, 34 and on the stepped recesses 24, 24 of the second mounting board 2. Orifice grooves 36, 36 are provided to communicate the openings of the two. In addition, a part of the rubber wall that defines the second concave portions 34, 34 located on the outermost side of the rubber elastic body 3 includes partition walls 37 that partition the first concave portions 33, 33 and the second concave portions 34, 34. The diaphragm 38 has a spring rigidity smaller than that of the diaphragm 37.
[0023]
The plate-like lid member 4 is formed of a steel plate into a rectangle having substantially the same size as the second mounting substrate 2. The plate-shaped lid member 4 is fixed to the second mounting substrate 2 by caulking the six caulking portions 25 of the second mounting substrate 2 in a state of being superimposed on the second mounting substrate 2. I have. As a result, the plate-shaped lid member 4 covers the openings of the first concave portions 33, 33 and the second concave portions 34, 34 of the rubber elastic body 3, and the main liquid chamber 41 is provided between the first concave portions 33, 33. , 41 are formed, and auxiliary liquid chambers 42, 42 are formed between the second concave portions 34, 34. That is, on both sides in the longitudinal direction of the central hole 31 of the rubber elastic body 3, a main liquid chamber 41 and a sub liquid chamber 42 arranged in parallel from the central hole 31 side to the outside are formed one by one on each side. ing. The main liquid chambers 41, 41 and the sub liquid chambers 42, 42 are liquid-tightly sealed by seal lips 35 provided on the rubber elastic body 3.
[0024]
The plate-shaped lid member 4 covers the openings of the orifice grooves 36, 36 provided between the first concave portions 33, 33 and the second concave portions 34, 34, so that the main liquid chambers 41, 41 are formed. Orifice passages 43, 43 are formed to communicate with the auxiliary liquid chambers 42, 42. Since the resonance frequency of the liquid flowing through the orifice passages 43 is substantially determined by the passage length and cross-sectional area of the orifice passages 43, 43, the orifice passages 43 are adjusted to the frequency of vibration to be reduced (for example, engine shake or idling vibration). The length and cross-sectional area of the passage are appropriately set.
[0025]
The main liquid chambers 41, 41, the sub liquid chambers 42, 42, and the orifice passages 43, 43 are filled with an incompressible liquid L such as water, alkylene glycol, or silicone oil. In this case, the work of caulking the caulking portions 25,... Of the second mounting substrate 2 and fixing the plate-shaped lid member 4 to the second mounting substrate 2 is performed in the liquid L to be sealed in the main liquid chambers 41, 41 and the like. As a result, the liquid L is sealed in the main liquid chambers 41, 41 and the like.
[0026]
The suspension type liquid-seal engine mount of the present embodiment configured as described above has a single power unit for suspending the power unit mounted on the vehicle at two points on the vehicle body frame on both sides in the vehicle left-right direction. Are used. That is, each of the liquid-tight engine mounts has a first mounting substrate 1 fixed to a bracket of a vehicle body frame by mounting bolts inserted into the circular holes 13, 13, and a hanging shaft member having a lower end connected and fixed to the power unit. 5 is inserted from the insertion hole 11 side of the first mounting substrate 1 into the mounting hole 21 of the second mounting substrate 2, and is then screwed down with a nut 52 and fixed. In this case, the liquid seal engine mount is mounted such that the second mounting substrate 2 is located on the upper side and the longitudinal direction thereof is in the front-rear direction of the vehicle.
[0027]
When vibration in a high frequency region generated from an engine or the like is input to the liquid-tight engine mount thus mounted, the vibration is effectively absorbed by the elastic deformation of the rubber elastic body 3. Further, when vibrations in a low frequency region such as an engine shake are input, the pressure and volume of the main liquid chambers 41 and 41 and the sub liquid chambers 42 and 42 change with the elastic deformation of the rubber elastic body 3. The vibration of the liquid L flowing through the orifice passage 43 is effectively absorbed by the liquid column resonance action.
[0028]
The vibration input to the liquid-tight engine mount is mainly the vibration in the load input direction of the power unit (vertical direction in the vehicle). However, when the vehicle is running, the power unit is suspended, so the vehicle is suspended. May also be input. Even in this case, the liquid seal engine mount of the present embodiment has the main liquid chambers 41 and 41 and the sub liquid chambers 42 and 42 arranged in parallel along the longitudinal direction (the front-rear direction of the vehicle). The pressures and volumes of the liquid chambers 41, 41 and the auxiliary liquid chambers 42, 42 are easily changed, and the flow of the liquid L in the orifice passages 43, 43 connecting the main liquid chambers 41, 41 and the auxiliary liquid chambers 42, 42. The action occurs easily. Therefore, the vibration in the front-rear direction of the vehicle is also effectively reduced by the liquid column resonance action of the liquid L flowing through the orifice passages 43, 43.
[0029]
As described above, the suspension type liquid-tight engine mount of the present embodiment has a structure in which the rubber elastic body 3 is interposed between the rectangular first mounting substrate 1 and the second mounting substrate 2 which are arranged substantially in parallel. Since the overall shape is formed in a rectangular shape, it can be mounted more advantageously than conventional bowl-shaped liquid-sealed engine mounts, and the design restrictions are greatly eased. Space can be saved.
[0030]
Further, in the suspension type liquid ring engine mount of the present embodiment, the main liquid chambers 41, 41 and the sub liquid chambers 42, 42 are respectively provided with the central holes 31 at axially symmetric positions on both longitudinal sides of the central hole 31 of the rubber elastic body 3. Since they are arranged in parallel from the side to the outside, the vibration of the liquid L flowing through the orifice passages 43, 43 can be satisfactorily reduced not only in the vertical direction of the vehicle but also in the longitudinal direction. The performance can be improved.
[0031]
Further, in the suspension type liquid-sealed engine mount of the present embodiment, the rubber wall of the rubber elastic body 3 which defines the sub liquid chambers 42, 42 located outside the main liquid chambers 41, 41 is formed by the main liquid chamber 41, Since the diaphragms 38, 38 having a smaller spring rigidity than the partition walls 37, 37 partitioning the sub liquid chambers 41 from the sub liquid chambers 42, 42, the main liquid chambers 41, 41 are separated from the sub liquid chambers at the time of vibration input. The liquid L can be made to flow reliably toward 42,42.
[0032]
In the suspension type liquid-tight engine mount of the present embodiment, the orifice passages 43, 43 for communicating the main liquid chamber 4141 and the sub liquid chambers 42, 42 are provided with the main liquid chamber 41 arranged on one side in the longitudinal direction. While the main liquid chamber 41 on one side in the longitudinal direction and the sub liquid chamber 42 on the other side can be connected to each other. In this case, since the orifice passages 43, 43 become longer, it is advantageous when tuning the orifice passages 43, 43 when it is desired to increase the length of the orifice passages 43, 43.
[0033]
[Embodiment 2]
FIG. 7 is a vertical cross-sectional view showing the right half of the hanging liquid ring engine mount according to the present embodiment.
[0034]
As shown in FIG. 7, the suspension type liquid-sealed engine mount of this embodiment is different from that of the first embodiment in that an intermediate liquid chamber 45 provided between the main liquid chamber 41 and the sub liquid chamber 42 is added. Things. Therefore, members and the like common to the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. Hereinafter, different points will be mainly described.
[0035]
In the suspension type liquid-sealed engine mount according to the present embodiment, the length of the first mounting substrate 1, the second mounting substrate, the rubber elastic body 3, and the plate-like lid member 4 in the longitudinal direction is obtained by adding the intermediate liquid chamber 45. Has been extended.
[0036]
A third window 26 is provided in a portion between the first window 22 and the second window 23 of the second mounting board 2. Further, in the portion between the first window portion 22 and the third window portion 26 and in the portion between the third window portion 26 and the second window portion 23, stepped recesses 24a and 24b similar to those in the first embodiment are provided. Is provided.
[0037]
Further, a third concave portion 33a which is opened to the same side as the first concave portion 33 and formed to have substantially the same size is provided in a portion between the first concave portion 33 and the second concave portion 34 of the rubber elastic body 3. . The third concave portion 33a is formed to have a size slightly smaller than the third window portion 26 of the second mounting board 2, and is open to the third window portion 26. A seal lip is provided around the third window portion 33a. 35a is provided. The intermediate liquid chamber 45 is formed by covering the opening of the third concave portion 33 a with the plate-shaped lid member 4.
[0038]
An orifice groove 36a is provided between the first concave portion 33 and the third concave portion 33a and on the stepped concave portion 24a of the second mounting board 2 to communicate the openings of the first concave portion 33 and the third concave portion 33a. Is provided. An orifice groove 36b communicating between the openings of the third recess 33a and the second recess 34 is provided between the third recess 33a and the second recess 34 and on the stepped recess 24b of the second mounting board 2. Is provided. The openings of the orifice grooves 36a, 36b are covered with the plate-shaped lid member 4, so that orifice passages 43a, 43b are formed.
[0039]
Further, a partition wall 37a that partitions the first concave portion 33 and the third concave portion 33a is set to have a higher spring rigidity than a partition wall 37b that partitions the third concave portion 33a and the second concave portion 34. That is, the partition wall 37b located outside the partition wall 37a has lower spring stiffness than the partition wall 37a. Further, the diaphragm 38 located outside the partition wall 37b has a lower spring rigidity than the partition wall 37b.
[0040]
The suspension type liquid-sealed engine mount of the present embodiment configured as described above suspends the power unit mounted on the automobile at two points on both sides of the vehicle in the vehicle left-right direction on the body frame, as in the case of the first embodiment. It is used in such a manner as to be supported by vibration isolation, and has the same function and effect as those of the first embodiment.
[0041]
In particular, in the case of the liquid seal engine mount of the present embodiment, an intermediate liquid chamber 45 is provided between the main liquid chamber 41 and the sub liquid chamber 42, and the liquid L sealed in each of the liquid chambers 41, 42, and 45 is provided. Since the total amount is increased, the flow amount of the liquid L flowing through the orifice passages 43a and 43b can be increased, so that a better vibration reduction effect can be obtained.
[0042]
In addition, the liquid seal engine mount of the present embodiment has two orifice passages 43a and 43b in a set of liquid filling structures including the main liquid chamber 41, the sub liquid chamber 42, and the intermediate liquid chamber 45, so that the orifice passage 43a , 43b are easily tuned, and the tuning width (reducible vibration frequency band) is also expanded. By making the tuning frequencies of the two orifice passages 43a and 43b different, it is also possible to reduce a plurality of vibrations having different frequencies.
[0043]
In the present embodiment, one intermediate liquid chamber 45 is added between the main liquid chamber 41 and the sub liquid chamber 42, but two or more intermediate liquid chambers 45 can be added.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a suspension type liquid-tight engine mount according to a first embodiment of the present invention, and is a sectional view taken along line II of FIG. 2;
FIG. 2 is a plan view of the suspension type liquid-tight engine mount according to the first embodiment of the present invention.
FIG. 3 is a sectional view taken along line III-III in FIG. 2;
FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;
FIG. 5 is a sectional view taken along line VV of FIG. 2;
FIG. 6 is a plan view of a second mounting board of the suspension type liquid-tight engine mount according to the first embodiment of the present invention.
FIG. 7 is a longitudinal sectional view showing a right-hand half of a suspended liquid-tight engine mount according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... 1st mounting board 2 ... 2nd mounting board 3 ... Rubber elastic body 4 ... Plate-shaped lid member 5 ... Hanging shaft member 11 ... Insertion hole 12 ... Projection part 13 ... Circular hole 21 ... Mounting hole 22 ... 1st window Part 23: Second window part 24, 24a, 24b Stepped concave part 25: Caulking part 26: Third window part 31: Central hole 32: Stopper part 33: First concave part 33a: Third concave part 34: Second concave part 35 .., 35a... Seal lips 36, 36a, 36b... Stopper 52: Nut L: Liquid

Claims (3)

A first mounting board that is rectangular and has a through-hole in which a suspension shaft member for hanging the power unit is inserted and disposed at the center thereof, and that is mounted on the vehicle body side;
A second mounting substrate, which is disposed substantially parallel to the first mounting substrate at a distance from the first mounting substrate and has a rectangular mounting hole to which one end of the hanging shaft member is mounted at the center thereof;
The first mounting board and the second mounting board are interposed between the first mounting board and the second mounting board so as to be integrally connected to each other, and a center hole through which the hanging shaft member is inserted and arranged is provided on the first mounting board side or the first mounting board side. (2) a rubber elastic body having a plurality of concave portions which are opened on the mounting substrate side and which are arranged at the axially symmetric positions on both sides in the longitudinal direction of the central hole and arranged in parallel in the outward direction from the central hole side, respectively;
A plate-like lid member that covers the opening of each of the concave portions of the rubber elastic body and forms a plurality of liquid chambers between each of the concave portions, in which a liquid is sealed and communicated with each other by an orifice passage;
A suspended liquid-tight engine mount characterized by comprising: The rubber wall defining and partitioning the outermost liquid chamber of the rubber elastic body is configured to include a diaphragm having a lower spring rigidity than a partition wall partitioning each of the adjacent liquid chambers. Item 4. A suspended liquid-sealed engine mount according to item 1. 3. The suspended liquid-sealed engine mount according to claim 2, wherein the partition walls partitioning the respective liquid chambers adjacent to the rubber elastic body have a smaller spring rigidity as being located on the outer side.

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