JP2006194376A - Fluid sealed cylindrical mount - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid sealed cylindrical mount having improved durability while stably and economically securing vibration absorbing effects against input vibration of desired frequency band. <P>SOLUTION: In a cavity 42 between a body rubber elastic material 16 and a rubber elastic film 38, a spring rigidity auxiliary member 68 is arranged to be integrally movable with a shaft member 12 in the state of contacting the rubber elastic film 38 to be energized to the inside of a balancing chamber. The spring rigidity auxiliary member 68 is elastically deformed with the elastic deformation of the rubber elastic film 38, thereby increasing the spring rigidity of the rubber elastic film 38. When the shaft member 12 is moved at a great distance, the spring rigidity auxiliary member 68 is isolated from the rubber elastic film 38. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fluid-filled cylindrical mount, and in particular, has a plurality of liquid chambers in which an incompressible fluid is sealed, and an anti-vibration effect based on the fluid action of the sealed fluid between the plurality of liquid chambers The present invention relates to an improved structure of a fluid-filled cylindrical mount.

  Conventionally, it is interposed between two members constituting a vibration transmission system, and is attached to one of two members to be anti-vibration connected as a kind of anti-vibration coupling body connecting the two members. A main rubber elasticity in which a shaft member and an outer cylindrical member that is disposed at a predetermined distance outwardly in the direction perpendicular to the axis of the shaft member and is attached to the other of the two members are interposed therebetween On the other hand, a pressure receiving chamber in which a part of the wall portion is formed by the main rubber elastic body is formed between the shaft member and the outer cylinder member, and a gap is formed between the main rubber elastic body An equilibrium chamber, part of the wall part of which is formed by a rubber elastic membrane provided through the pressure chamber, is formed separately from the pressure receiving chamber, and the pressure receiving chamber and the equilibrium chamber communicate with each other through an orifice passage. When vibration is input, each of the pressure receiving chamber and the equilibrium chamber Incompressible fluid sealed is constructed fluid-filled cylindrical mount As can be caused to flow into one another through the orifice passage, is known (for example, see Patent Document 1).

  Such a fluid-filled cylindrical mount can provide an effective anti-vibration effect on the basis of the resonance action of an incompressible fluid that is caused to flow through the orifice passage when vibration is input. And as a suspension bush.

  By the way, in such a fluid-filled cylindrical mount, in order to ensure that the anti-vibration performance according to the type of the member to be anti-vibrated and connected can be reliably exerted, the input vibration in a desired frequency range is not affected. And having a stable anti-vibration effect. For example, in an automobile engine mount, input in a wide frequency range from a low frequency range to a high frequency range so that low dynamic spring characteristics from an idling vibration range to a high frequency range are exhibited along with damping performance in a low frequency range. It is desired to have a stable anti-vibration effect against vibration.

  Under such circumstances, two equilibration chambers are provided between the shaft member and the outer cylinder member, and the two equilibration chambers and the pressure receiving chamber are respectively communicated with each other by two independent orifice passages. In addition, two vibration systems are formed for each orifice passage, and the rubber elastic film constituting a part of the wall of the equilibrium chamber in one of the two vibration systems is made thin, while the vibration of the other is made There has been proposed a fluid-filled cylindrical mount having a structure in which a rubber elastic film constituting a part of a wall portion of an equilibrium chamber in a system is thick (see, for example, Patent Document 2).

  In such a mount, a thick rubber elastic film is provided with a spring rigidity larger than that of a thin rubber elastic film, and a part of the wall portion is made of a thin rubber elastic film having a small spring rigidity. In a vibration system having a balanced chamber made of a thick rubber elastic film having a large spring rigidity, the fluid is tuned so that the fluid resonates in a low frequency range. Are tuned to resonate in the high frequency range. As a result, an effective anti-vibration effect with respect to input vibrations in a wide frequency range from a low frequency range to a high frequency range is realized.

  However, in such a conventional fluid-filled cylindrical mount, the resonance frequency of the fluid in the two vibration systems provided inside is tuned by the thickness of the rubber elastic film in the equilibrium chamber in each vibration system. For example, when the frequency of the input vibration is changed by changing the member to be vibration-proof connected, the thickness of the rubber elastic film and the orifice are accordingly changed. It was necessary to change the cross-sectional area of the passage one by one. For this purpose, the design of the mold used for vulcanization molding of the rubber elastic membrane and the orifice member forming the orifice passage must be changed.

  Therefore, in the conventional fluid-filled cylindrical mount, a dedicated die or the like must be prepared for each member to be vibration-proofed during the manufacture thereof, and thus the manufacturing cost is inevitable. The problem of soaring was inherent.

  Further, in such a conventional mount, since a part of the wall portion in one of the two equilibrium chambers is composed of a thin rubber elastic film having small spring rigidity and easy elastic deformation, The equilibrium chamber with a thin rubber elastic membrane as a part of the wall can change the volume more easily than the equilibrium chamber with a thick rubber elastic membrane with a large spring rigidity as a part of the wall. It becomes like this. Therefore, for example, when an excessive vibration load is abruptly input, the fluid in the pressure receiving chamber passes through the orifice passage and enters the equilibrium chamber made of a thin rubber elastic film having a small wall rigidity. A phenomenon is caused in which a part of the wall portion is caused to flow more intensively and in a larger amount than in the equilibrium chamber made of a thick rubber elastic film having a large spring rigidity.

  Therefore, in the conventional fluid-filled cylindrical mount, the durability of the thin rubber elastic membrane is lowered by repeated input of excessive vibration load, and the use durability of the entire mount may be lowered. There was also.

No. 7-16127 Japanese Patent No. 2613895

  Here, the present invention has been made in the background as described above, and the problem to be solved is to obtain a stable vibration-proofing effect against input vibration in a desired frequency range. In addition, even if the frequency of the input vibration is changed by changing a member to be connected for vibration isolation, a stable vibration isolation effect can be maintained at as low a cost as possible. It is an object of the present invention to provide a novel structure of a fluid-filled cylindrical mount that can effectively prevent a decrease in durability due to repeated input of a vibration load.

  As a result of earnest research to solve the above-described problems, the present inventor has provided a special spring stiffness auxiliary member for increasing the spring stiffness of the rubber elastic membrane constituting a part of the wall portion of the equilibrium chamber. It has been found that the above-mentioned problems can be solved by disposing the mount structure inside the mount. The present invention has been completed by further specifying the structure and the like of such a spring stiffness auxiliary member.

That is, this invention is comprised from the following invention.
(1) A shaft member attached to one of the two members to be anti-vibrated and connected to the blood, and arranged at a predetermined distance outward in a direction perpendicular to the axis of the shaft member, of the two members An outer cylinder member attached to the other of the two is connected by a main rubber elastic body interposed therebetween, and a wall is formed between the shaft member and the outer cylindrical member by the main rubber elastic body. A pressure receiving chamber in which a part of the part is formed, and an equilibrium chamber in which a part of the wall part is configured by a rubber elastic film provided through a gap between the main body rubber elastic body, The pressure receiving chamber is formed separately from the pressure receiving chamber, and the pressure receiving chamber and the equilibrium chamber are communicated with each other through an orifice passage, and are enclosed in the pressure receiving chamber and the equilibrium chamber, respectively, at the time of vibration input. So that incompressible fluids can flow through each other through the orifice passage In the fluid-filled cylindrical mount configured as described above, a spring stiffness auxiliary member formed using an elastic material inside the gap formed between the main rubber elastic body and the rubber elastic film includes the shaft member and In a state where the outer cylindrical member is attached to the two members, the shaft member is brought into contact with the rubber elastic membrane with a biasing force that biases the rubber elastic membrane toward the inside of the equilibrium chamber. Elastically deformable of the rubber elastic membrane based on the flow of the incompressible fluid between the pressure receiving chamber and the equilibrium chamber. Accordingly, the elastic elasticity of the rubber elastic film is increased by applying the urging force to the rubber elastic film, thereby increasing the spring rigidity of the rubber elastic film, while the shaft member is separated from the rubber elastic film. Set in advance When the fluid is moved by an amount larger than the amount of movement, the spring stiffness assisting member is separated from the rubber elastic film by integral movement with the shaft member. Enclosed cylindrical mount.

  (2) a first equilibrium chamber in which a part of a wall portion is configured by a first rubber elastic film provided between the main rubber elastic body via a first gap, and the main rubber elasticity A part of the wall portion is constituted by a second rubber elastic film provided between the body and a second gap, and is formed separately from the first equilibrium chamber in a non-communication state. The equilibrium chamber is constituted by a second equilibrium chamber, while the orifice passage communicates the first orifice passage communicating the pressure receiving chamber and the first equilibrium chamber, the pressure receiving chamber, and the first A second orifice passage communicating with the two equilibrium chambers, and further, the spring stiffness assisting member is disposed in one of the first gap and the second gap. The fluid-filled cylindrical mount described in (1) above.

  (3) The spring stiffness assisting member has a deformed portion configured to include a rubber elastic plate having a curved portion that is curved or bent so as to be convex in the plate thickness direction. A rubber elastic plate is disposed in the space in a state of being elastically deformed so that the curved portion is pushed and expanded under the contact between the main rubber elastic body and the rubber elastic film in the gap. The fluid according to (1) or (2), wherein the rigidity auxiliary member is disposed in the gap so as to be elastically deformable in a state where the rigidity auxiliary member is brought into contact with the rubber elastic film with the urging force. Enclosed cylindrical mount.

  (4) The deformed portion of the spring stiffness assisting member causes the two elastic elastic plates to face each other on the inner side surfaces of the curved portion, and is integrated at both side portions sandwiching the curved portion. The two rubber plates in the deformed portion are elastically deformed so that the respective curved portions are expanded in contact with the main rubber elastic body and the rubber elastic film in the gap. The fluid-filled cylindrical mount according to the above (3), which is arranged in a state where it is placed.

  (5) The spring stiffness assisting member is disposed in the gap so as to be elastically deformable in a state in which the spring stiffness assisting member is brought into contact with the rubber elastic film with the biasing force, and the shaft member. Any one of the above (1) to (4) configured to include a fixed portion that is extrapolated and fixed so as to be integrally movable, and a connecting portion that connects the deformable portion and the fixed portion. The fluid-filled cylindrical mount according to one.

  (6) The connecting portion has a form extending outward in a direction perpendicular to the axis of the shaft member, and the shaft member and the outer cylinder are brought into contact with the inner peripheral surface of the outer cylinder member at the time of vibration input. The fluid-filled cylindrical mount according to any one of (1) to (5), configured to be able to regulate a relative displacement amount in a direction perpendicular to the axis with respect to a member.

  That is, in the fluid-filled cylindrical mount according to the present invention, the spring stiffness of the rubber elastic membrane is increased by being assisted by the spring stiffness auxiliary member. The resonance frequency of the incompressible fluid determined based on the spring stiffness of the rubber elastic film can be tuned easily and reliably by adjusting only the spring stiffness of the spring stiffness assisting member as appropriate. Can be done.

  In such a fluid-filled cylindrical mount, as described above, the resonance frequency of the incompressible fluid can be changed simply by changing the spring stiffness of the spring stiffness auxiliary member. At this time, for example, if the spring stiffness auxiliary member is replaced with one having a desired spring stiffness, it is not necessary to change the thickness of the rubber elastic body in order to change the spring stiffness of the rubber elastic membrane. Therefore, it is advantageous to change the design of the mold used for vulcanization molding of the rubber elastic membrane when the frequency of the input vibration can be changed by changing the member to be vibration-proof connected. Can be resolved.

  That is, in the fluid-filled cylindrical mount according to the present invention, a plurality of types of spring stiffness auxiliary members having different spring stiffnesses in advance even when different incompressible fluid resonance frequencies are required. If the target mount is prepared, the target mount can be advantageously manufactured by using one mold universally, so that the cost for preparing multiple types of molds is effective. Can be reduced.

  Further, in the fluid-filled cylindrical mount according to the present invention, for example, even if the rubber elastic film is made relatively thin and the spring rigidity of the rubber elastic film itself is reduced, the spring rigidity is increased by the spring rigidity auxiliary member. As a result, the spring elasticity of substantially the same magnitude as that when the thickness of the rubber elastic film is increased can be secured in the rubber elastic film.

  Therefore, in such a fluid-filled cylindrical mount, when two equilibrium chambers and two orifice passages are provided to form two vibration systems, one wall portion of each of the two equilibrium chambers is formed. Even if the thickness of the rubber elastic film constituting the part is the same relatively thin, the spring rigidity of either one of the rubber elastic films is increased by the spring rigidity auxiliary member. The resonance frequency of the incompressible fluid in the vibration system can be made different from each other. In addition, since the spring auxiliary member can be moved integrally with the shaft member, for example, when an excessive vibration load is input, the spring rigidity auxiliary member is moved from the rubber elastic film by the integral movement with the shaft member. It can also be made to be separated. And by setting it as such a structure, after ensuring the desired vibration-proof performance, when an excessive vibration load is input, an incompressible fluid is put into one of the two equilibrium chambers. It can be advantageously avoided that a large amount of fluid flows in a concentrated manner.

  Therefore, in the fluid-filled cylindrical mount according to the present invention as described above, a stable vibration-proofing effect against input vibration in a desired frequency range can be obtained simply by adjusting the spring rigidity of the spring rigidity auxiliary member. It can be obtained easily and reliably. In addition, even if the frequency of the input vibration is changed by changing the member to be vibration-proof connected, by selecting and using an appropriate spring stiffness auxiliary member prepared in advance, it is stable. The anti-vibration effect can be advantageously ensured at the lowest possible cost. In addition, a decrease in durability due to repeated input of excessive vibration load can be effectively prevented.

  Hereinafter, in order to clarify the present invention more specifically, an embodiment of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 schematically shows an engine mount 10 for an automobile as an embodiment of a fluid-filled cylindrical mount according to the present invention in a cross-sectional form. In the engine mount 10, an inner cylinder fitting 12 as a shaft member and an outer cylinder fitting 14 as an outer cylinder member are arranged eccentrically with a predetermined distance in the radial direction. It is elastically connected by the interposed main rubber elastic body 16, and the inner cylinder fitting 12 and the outer cylinder fitting 14 are fixedly attached to a body and a power unit (not shown), so that the power unit is attached to the body. It is designed to support vibration isolation.

  More specifically, the inner cylinder fitting 12 has a thick small diameter cylindrical shape. In addition, a bound stopper 18 formed of a hard material such as metal or synthetic resin protrudes on one side in the radial direction on the outer peripheral surface of the inner cylindrical metal member 12 while being embedded in the main rubber elastic body 16. It is fixed.

  Further, a metal sleeve 20 is arranged on the outer side in the radial direction of the inner cylindrical metal member 12 with a predetermined distance and eccentric with a predetermined amount. The metal sleeve 20 has a thin large-diameter cylindrical shape, and a substantially rectangular first window portion 22 that extends in the circumferential direction with a length less than a half circumference is formed in the central portion in the axial direction. . Further, in the central portion of the metal sleeve 20 in the axial direction, the portion facing the first window portion 22 in one radial direction (vertical direction in FIG. 1) that is an eccentric direction with respect to the inner cylindrical fitting 12 is The substantially rectangular 2nd window part 24 and the 3rd window part 25 which are extended in the circumferential direction by the length of less than 1/4 circumference are formed. Furthermore, between the edge parts of the circumferential direction both sides of the 1st window part 22, the 2nd window part 24, and the 3rd window part 24, it extends in the circumferential direction, respectively, and these window parts 22,24,25 are attached. Concave grooves 26 are formed.

  Further, a main rubber elastic body 16 is interposed between the inner cylindrical fitting 12 and the metal sleeve 20. The main rubber elastic body 16 has a substantially large-diameter thick cylindrical shape, and the inner cylindrical metal member 12 is vulcanized and bonded to the inner peripheral surface and the metal sleeve 20 is bonded to the outer peripheral surface. It is an integrally vulcanized molded product. The main rubber elastic body 16 has an opening on the outer peripheral surface on one side in the eccentric direction of the inner cylindrical metal member 12 and the metal sleeve 20 (the upper side in FIG. 1, which is the side with a small separation distance in the eccentric direction). A first pocket portion 30 is formed, and the first pocket portion 30 is opened to the outer peripheral surface through the first window portion 22 of the metal sleeve 20.

  Further, on the other side in the eccentric direction of the inner sleeve 12 and the metal sleeve 20 in which the main rubber elastic body 16 is interposed (the lower side in FIG. 1, which is the side with the larger separation distance in the eccentric direction). Is formed with a hollow space 32 extending in the axial direction between the inner cylindrical metal member 12 and the metal sleeve 20 over a substantially half circumference. In other words, the main rubber elastic body 16 is substantially interposed between the inner cylindrical metal member 12 and the metal sleeve 20 on the second and third window portions 24 and 25 side where the hollow space 32 is provided. The main rubber elastic body 16 is exclusively interposed only on one side (the upper side in FIG. 1) of the inner cylinder 12 and the metal sleeve 20 in the eccentric direction.

  In the empty space 32 where the main rubber elastic body 16 is not interposed, a film-like rubber portion 34 that is integrally formed with the main rubber elastic body 16 is a first pocket portion 30 of the main rubber elastic body 16. Opposing to the outer peripheral surface opposite to the side, the second window portion 24 and the third window portion 25 of the metal sleeve 20 are respectively disposed so as to cover the inner peripheral side.

  That is, the film-like rubber portion 34 has a thick plate-like connecting rubber portion 36 that extends in the axial direction at the center portion in the circumferential direction, and a thin-walled rubber that is positioned on both sides in the circumferential direction across the connecting rubber portion 36. The first rubber elastic film 38 and the second rubber elastic film 40 having a bag shape and easily deformable are configured. The first rubber elastic film 38 and the second rubber elastic film 40 have the same thickness. The connecting rubber portion 34 is vulcanized and bonded to a portion located between the second window portion 24 and the third window portion 25 in the metal sleeve 20, while the first and second rubbers In the state where the elastic films 38 and 40 are positioned opposite to the outer peripheral surface of the main rubber elastic body 16 opposite to the pocket portion 30 side, the main rubber elasticity is provided at the end opposite to the connecting rubber portion 34 side. The body 16 is integrally connected.

  As a result, the bag-like first rubber elastic film 38 is positioned between the outer surface and the main rubber elastic body 16 via the first gap 42, and the bag-like inner space is made to pass through the second space. The pocket portion 44 is arranged in a state of opening to the outside through the second window portion 24 in the metal sleeve 20. The bag-like second rubber elastic membrane 40 is positioned between the outer surface and the main rubber elastic body 16 via the second gap 46, and the bag-like inner space is formed in the third pocket. As the part 48, it arrange | positions in the state opened to the exterior through the 3rd window part 25 in the metal sleeve 20. FIG. Here, as described above, since the first rubber elastic film 38 and the second rubber elastic film 40 are thin and have the same thickness, the first and second rubber elastic films 38, The spring stiffness of 40 is relatively small and the same size.

  In addition, an orifice forming member 50 is assembled to an integrally vulcanized molded product in which the inner cylindrical metal member 12 and the metal sleeve 20 are vulcanized and bonded to the inner and outer peripheral surfaces of the main rubber elastic body 16. The orifice forming member 50 has a substantially semi-annular shape as a whole, and opens at the end surface of both end portions in the circumferential direction at the center portion in the width direction (axial direction) on the outer peripheral surface. Two circumferential grooves 52, 52 extending continuously with a circumferential length of less than ¼ are formed from the center toward the center in the circumferential direction. In addition, a through hole 54 penetrating the bottom surface is formed at each end on the central side of the two circumferential grooves 52, 52 of the orifice forming member 50.

  The orifice forming member 50 is connected to the second pocket portion 44 and the third pocket portion 48 through the two through holes 54 on the side of the empty space 32. In such a state, the second and third window portions 24 and 25 are fitted into the concave groove 26 of the metal sleeve 20 from the opening direction side and assembled. Here, a part of the main rubber elastic body 16 is formed so as to surround the inner and outer peripheral surfaces of the formation portion of the concave groove 26 of the metal sleeve 20, thereby fitting the orifice forming member 50 and the same. The main rubber elastic body 16 is interposed between the groove 26 and the groove 26 so that the gap between the orifice forming member 50 and the groove 26 is sealed.

  In addition, the outer cylinder fitting 14 in which the thin seal rubber layer 56 is formed over the entire inner peripheral surface is extrapolated from the integrally vulcanized molded product in which the orifice forming member 50 is assembled. And fixed.

  Thus, the openings of the first to third pocket portions 30, 44, 48 are covered with fluid tightness, and the two circumferential grooves 52, 52 formed by the orifice forming member 50 are covered with fluid tightness. . As a result, a part of the wall portion is formed by the main rubber elastic body 16 on the opposite side of the meat emptying space 32, and a pressure receiving chamber 58 in which an internal pressure fluctuation is generated by vibration input is formed. Further, a part of the wall portion is constituted by the first rubber elastic film 38 in the empty space 32, and the volume change is easily allowed based on the elastic deformation of the first rubber elastic film 38. A part of the wall portion is constituted by the first equilibrium chamber 60 and the second rubber elastic film 40, and the volume change is easily allowed based on the elastic deformation of the second rubber elastic film 40. A second equilibrium chamber 62 is formed. Further, between the pressure receiving chamber 58 and the first and second equilibrium chambers 60, 62, a first orifice passage 64 communicating the pressure receiving chamber 58 and the first equilibrium chamber 60, a pressure receiving chamber 58, and A second orifice passage 66 communicating with the second equilibrium chamber 62 is formed.

  In addition, in each of the pressure receiving chamber 58, the first and second equilibrium chambers 60, 62, and the first and second orifice passages 64, 66, water, alkylene glycol, polyalkylene glycol, silicone oil, etc. A predetermined incompressible fluid is enclosed. Then, the pressure difference generated between the pressure receiving chamber 58 and the first and second equilibrium chambers 60 and 62 during vibration input causes the pressure between the pressure receiving chamber 58 and the first and second equilibrium chambers 60 and 62. Thus, the incompressible fluid sealed inside them is caused to flow through the first and second orifice passages 64 and 66. That is, here, the first vibration system is formed by the pressure receiving chamber 58, the first equilibrium chamber 60, and the first orifice passage 64 for communicating them, and the pressure receiving chamber 58, A second vibration system is formed by the two equilibrium chambers 62 and the second orifice passage 66 that allows them to communicate with each other.

  As a result, in the engine mount 10 of the present embodiment, the inner cylinder fitting 12 and the outer cylinder fitting 14 are attached to each of the body and the power unit with the inner cylinder fitting 12 and the outer cylinder fitting 14 being connected between the inner and outer cylinder fittings 12 and 14. When a radial vibration that is substantially eccentric is input, fluid flow between the pressure receiving chamber 58 and the first and second equilibrium chambers 60 and 62 through the first and second orifice passages 64 and 66 occurs. As a result, an anti-vibration effect based on a fluid action such as a resonance action of the fluid is exhibited.

  Here, the passage length and the cross-sectional area of each of the first orifice passage 64 and the second orifice passage 66 are set to the same size. Tuning is performed so that there is no difference in the resonance frequency of the incompressible fluid between the two vibration systems.

  Further, in the engine mount 10 shown in FIG. 2, the weight of the power unit is exerted between the inner and outer cylindrical fittings 12 and 14 and the main rubber elastic body 16 is elastically deformed in a state of being mounted on the body and the power unit. As described above, the amount of eccentricity between the inner cylinder fitting 12 and the outer cylinder fitting 14 is reduced, and the volume of the first gap 42 and the second gap 46 corresponds to the amount of decrease in the amount of eccentricity. It can be increased. And between these 1st space | gap 42 and 2nd space | gap 46, the 3rd space | gap 67 extended in the axial direction between the connection rubber | gum part 36 of the film-like rubber part 34 and the main body rubber elastic body 16 is formed. It has come to be.

  Further, in a state in which the engine mount 10 is mounted on the body and the power unit, in the bounding direction (the direction in which the inner cylinder fitting 12 is displaced toward the pressure receiving chamber 58 with respect to the outer cylinder fitting 14) between the inner and outer cylinder fittings 12 and 14. On the other hand, when an excessive load such as an impact load is applied, the front end surface of the bound stopper 18 is brought into contact with the outer cylindrical metal member 14 via the main rubber elastic body 16 portion surrounding the bound stopper 18, thereby The relative displacement amount of the cylindrical fittings 12 and 14 and the elastic deformation amount of the main rubber elastic body 16 are limited. 2 and FIG. 5 and FIG. 6 to be described later, it should be understood that the power unit and the body to which the inner and outer cylindrical fittings 12 and 14 are respectively attached are omitted.

  Thus, in the engine mount 10 of the present embodiment, in particular, it is formed between the first rubber elastic film 38 constituting the part of the wall portion of the first equilibrium chamber 60 and the main rubber elastic body 16. A spring stiffness auxiliary member 68 is accommodated in the first gap 42.

  As shown in FIGS. 3 and 4, the spring stiffness assisting member 68 includes a deformable portion 70 made of a rubber material similar to the material for forming the main rubber elastic body 16, a metal fixing portion 72, and a connecting portion 74. Are integrally formed. Of the constituent parts of the spring stiffness assisting member 68, the fixing portion 72 has an annular plate shape including an inner hole 78 of a size that allows the inner cylindrical fitting 12 to be inserted into the inner cylindrical member 12.

  Further, the deformable portion 70 has a predetermined dimension rather than the axial length of the inner cylindrical metal fitting 12 in which a curved portion 80 that is curved so as to protrude toward one side in the thickness direction is provided at the center portion in the width direction. It has two rubber elastic plates 82 and 84 having a small length (see FIG. 6). And these two rubber elastic plates 82 and 84 are configured to be integrated at both end portions sandwiching the curved portion 80 in a state where the inner surfaces of the curved portions 80 face each other. Yes. In other words, the deformable portion 70 has a width in a state where the two rubber elastic plates 82 and 84 opposed to each other swell outward in the opposing direction so as to form a predetermined inner space 86 therebetween. They are integrally joined at both ends in the direction.

  Thus, in the deformable portion 70, the respective curved portions 80 are pushed and expanded with respect to the two rubber elastic plates 82 and 84 so that the inner space 86 becomes small (so as to be crushed). When a pressing force is applied inward from the outside in the direction and elastically deformed, the restoring force against the pressing force is directed outward in the opposing direction of the two rubber elastic plates 82 and 84. It has come to be demonstrated.

  Furthermore, the connecting portion 74 is configured to have a substantially L shape in which a long rectangular metal plate is bent 90 ° in the plate thickness direction on one end side in the length direction as a whole. . Further, a portion on one side in the length direction from the bent portion is a first extending plate portion 88 that extends from a part on the outer peripheral surface of the fixing portion 72 having an annular shape to one side in the radial direction. On the other hand, the portion on the other side in the length direction from the bent portion is a second extending plate portion 90 that extends with a length shorter by a predetermined dimension than the axial length of the inner cylinder fitting 12. The deformable portion 70 is vulcanized and bonded to the second extending plate portion 90 so as to extend laterally from the edge portion on one side in the width direction. As a result, the fixing portion 72 and the deformable portion 70 are integrally connected via the connecting portion 74.

  Thus, in the spring stiffness assisting member 68 having such a configuration, as shown in FIGS. 2, 5, and 6, the inner cylindrical metal member 12 is disposed in the inner hole 78 of the fixing portion 72. The inner cylindrical metal member 12 is fixed so as to be integrally movable, for example, by being press-fitted at one end in the length direction thereof. Further, under such fixation, the second extending plate portion 90 of the connecting portion 74 is inserted into the third gap 67 in a state of facing the connecting rubber portion 36 of the film rubber portion 34 with a predetermined distance. It is positioned. As a result, the rebound direction between the inner and outer cylinder fittings 12 and 14 (the direction in which the inner cylinder fitting 12 is displaced toward the first and second equilibrium chambers 60 and 62 with respect to the outer cylinder fitting 14) is shocking. When an excessive load such as a load is applied, the second extending plate portion 90 of the connecting portion 74 contacts the metal sleeve 20 or the outer cylindrical metal member 14 via the connecting rubber portion 36 of the membrane rubber portion 34. By being brought into contact with each other, the relative displacement amount of the inner and outer cylindrical fittings 12 and 14 and the elastic deformation amount of the main rubber elastic body 16 are limited. That is, here, the connecting portion 74 of the spring stiffness assisting member 68 is caused to function as a rebound stopper so that excellent use durability can be obtained.

  Further, in the spring stiffness assisting member 68, the entire deformable portion 70, on the outer surface of each of the two rubber elastic plates 82, 84, is fixed to the first gap 42 under the state of being fixed to the inner cylinder fitting 12. Are accommodated in the first gap 42 in contact with the outer surface of the main rubber elastic body 16 and the outer surface of the first rubber elastic film 38. Then, under such accommodation in the first gap 42, the fluid pressure of the incompressible fluid sealed in the first equilibrium chamber 60 is deformed through the first rubber elastic film 38. 70 is applied. As a result, the two rubber elastic plates 82 and 84 in the deforming portion 70 are sandwiched between the first rubber elastic film 38 and the main rubber elastic body 16 and elastically deformed so as to narrow the inner space 86. Therefore, the first rubber elastic film 38 is constantly urged toward the inside of the first equilibrium chamber 60 based on the restoring force of the deformable portion 70.

  Since the spring stiffness assisting member 68 is fixed so as to be integrally movable with respect to the inner cylinder fitting 12 as described above, for example, an impact load or the like is applied between the inner and outer cylinder fittings 12 and 14 in the bound direction. When the excessive load is applied, the deformed portion 70 of the spring stiffness assisting member 68 is separated from the first rubber elastic film 38, and the first rubber is deformed from the deformed portion 70 of the spring stiffness assisting member 68. The urging force to the inside of the first equilibrium chamber 60 applied to the elastic film 38 can be eliminated.

  Thus, in the engine mount 10 of the present embodiment, the vibration input causes the first and second orifice passages 64 and 66 to pass between the pressure receiving chamber 58 and the first and second equilibrium chambers 60 and 62. The fluid flows in the two chambers by elastic deformation of the first and second rubber elastic films 38 and 40 constituting part of the walls of the first and second equilibrium chambers 60 and 62. When the first and second rubber elastic films 38 are expanded and contracted, the deformed portion 70 of the spring stiffness assisting member 68 causes the first rubber elastic film 38 to move into the first equilibrium chamber 60. It can be elastically deformed while being urged toward the inside. Thus, the spring of the first rubber elastic film 38 is set to the same thickness as the spring rigidity of the second rubber elastic film 40 by being the same thickness as the second rubber elastic film 40. The rigidity is configured to be increased by an amount corresponding to the urging force of the deformable portion 70 of the spring rigidity auxiliary member 68.

  As described above, in the engine mount 10 according to the present embodiment, the spring rigidity of the first rubber elastic film 38 is substantially greater than the spring rigidity of the second rubber elastic film 40 with the assistance of the spring rigidity auxiliary member 68. Has been enlarged to. Therefore, the first rubber elastic film 38 is made thicker than the second rubber elastic film 40 even though the first rubber elastic film 38 and the second rubber elastic film 40 have the same thickness. Similarly to the case where the pressure receiving chamber 58 and the first equilibrium chamber 60 communicate with each other, the fluid flow resistance in the first orifice passage 64 that communicates the pressure receiving chamber 58 and the first equilibrium chamber 60 causes the second pressure chamber 58 and the second equilibrium chamber 62 to communicate with each other. The flow resistance of the fluid in the orifice passage 66 is made larger. Thereby, the resonance frequency of the fluid in the first vibration system including the first orifice passage 64 and the first equilibrium chamber 60 is tuned to a high frequency range, while the second orifice passage 66 is tuned. And the second equilibrium chamber 62, the resonance frequency of the fluid in the second vibration system is tuned to a low frequency range.

  Therefore, in the engine mount 10 of the present embodiment as described above, an effective anti-vibration effect against input vibrations in a wide frequency range from a low frequency range to a high frequency range can be advantageously realized, and thus the low frequency In addition to the damping performance in the region, the low dynamic spring characteristics from the idling vibration region to the high frequency region can be exhibited extremely effectively.

  Moreover, in such an engine mount, the resonance frequency of the fluid in the first vibration system depends on the urging force by the deforming portion 72 of the spring stiffness auxiliary member 68, in other words, the magnitude of the spring stiffness of the deforming portion 72. It is determined by the substantial spring rigidity of the first rubber elastic film 38 set as described above. Therefore, for example, even when the size of the power unit to which either one of the inner and outer cylindrical fittings 12 and 14 is attached is changed and the resonance frequency of the fluid in the first vibration system is changed, the first In order to change the thickness of the rubber elastic film 38, the spring rigidity auxiliary member 68 accommodated in the first gap 42 is simply provided without preparing another mold for vulcanizing the rubber elastic film 38. The resonance frequency of the fluid in the first vibration system can be tuned to a desired value by simply replacing the deformed portion 72 with one having a different spring rigidity.

  Therefore, in the engine mount 10 of the present embodiment, when obtaining ones having different resonance frequencies of the fluid by the first orifice passage 64, for example, a plurality of types of spring stiffness auxiliary members having the deforming portions 72 having different spring stiffnesses. If 68 is prepared in advance, it is possible to cope without changing the thickness of the first rubber elastic film 38, and thus the necessity of preparing a mold with high production costs can be advantageously eliminated.

  Therefore, in the present embodiment, for example, even if the size of the power unit to which one of the inner and outer cylindrical metal fittings 12 and 14 is attached is changed, a stable anti-vibration effect is advantageously ensured at the lowest possible cost. It can be done.

  In the engine mount 10, when an excessive load such as an impact load is applied between the inner and outer cylindrical fittings 12 and 14 in the bound direction, the deformed portion 72 of the spring stiffness auxiliary member 68 is The biasing force to the inside of the first equilibrium chamber 60 that is caused to move away from the one rubber elastic film 38 and act on the first rubber elastic film 38 from the deformed portion 72 of the spring stiffness assisting member 68 is eliminated. It has become. Therefore, when an excessive load is input, the fluid flow resistance in the first orifice passage 64 and the fluid flow resistance in the second orifice passage 66 have the same magnitude. One of the equilibrium chambers 62 can be advantageously avoided from causing a large amount of fluid to flow intensively from the pressure receiving chamber 58.

  Therefore, according to this embodiment, the durability of one of the first rubber elastic film 38 and the second elastic film 40 is higher than the other due to repeated input of an excessive vibration load. It can be effectively prevented that the durability of the engine mount 10 as a whole is lowered significantly.

  Further, in the engine mount 10 of the present embodiment, the spring stiffness assisting member 68 can be moved integrally with the deformable portion 70 that is elastically deformed in accordance with the elastic deformation of the first rubber elastic film 38 and the inner cylinder fitting 12. The fixing portion 72 is fixed, and the connecting portion 74 that connects the deforming portion 70 and the fixing portion 72 has a simple structure. Moreover, the deforming portion 70 of the spring stiffness auxiliary member 68 is The spring rigidity of the first rubber elastic film 38 can be increased simply by being accommodated in the first gap 46 and placed in contact with the first rubber elastic film 38. The complexity of the structure of the engine mount 10 due to the use of the spring stiffness assisting member 68 can be advantageously avoided.

  Further, in such an engine mount 10, the deformable portion 70 of the spring stiffness assisting member 68 includes two rubber elastic plates 82 and 84 each having a curved portion 80, and the first rubber elastic film 38 is elastically deformed. Accordingly, both of the two rubber elastic plates 82 and 84 are adapted to be elastically deformed so that the respective curved portions 80 are pushed and spread, so that the inside of the deformable portion 70 during the elastic deformation. The resulting stress can be advantageously distributed at the curved portions 80 of the two rubber elastic plates 82 and 84. Accordingly, there is an advantage that the use durability of the spring rigidity auxiliary member 68 and the engine mount 10 as a whole can be advantageously increased.

  Next, FIG. 7 schematically shows an engine mount 100 as another embodiment of a fluid-filled cylindrical mount having a structure according to the present invention in its cross-sectional form. This embodiment differs from the above-described embodiment in that it has a structure in which only one vibration system is formed, whereas the above-described embodiment has a structure in which only two vibration systems are formed. Has been. Therefore, here, only the configuration related to such a vibration system will be described, and, in addition to such a configuration, members and parts having the same configuration as in the above embodiment are denoted by the same reference numerals as in FIGS. 1 to 6. Detailed description thereof will be omitted.

  That is, in the engine mount 100 of the present embodiment, the first window portion 102 and the second window portion 104 are arranged in the circumferential direction at portions that are opposed to each other in the radial direction in the central portion in the axial direction of the metal sleeve 20. It is formed with a rectangular shape that spreads with a length less than a half circumference. Also here, the film-like rubber portion 34 formed integrally with the main rubber elastic body 16 is arranged so as to cover the second window 104 from the inner peripheral side. In the portion 34, the connecting rubber portion 36 positioned between the first rubber elastic membrane 38 and the second rubber elastic membrane 40 is not vulcanized and bonded to the metal sleeve 20. The entire structure is elastically deformable. Note that the first rubber elastic film 38, the second rubber elastic film 40, and the connecting rubber part 36 in the film rubber part 34 all have substantially the same thickness.

  Further, the orifice forming member 50 assembled to the metal sleeve 20 is opened at the end surface of one end portion in the circumferential direction at the center portion in the width direction (axial direction) on the outer peripheral surface, and from the one end portion to the center in the circumferential direction. A circumferential groove 106 that continuously extends with a circumferential length of more than ¼ circumference is formed toward the portion, and the end of the circumferential groove 106 on the center portion side penetrates the bottom surface thereof. A through hole 54 is formed. In a state where the orifice forming member 50 is assembled to the metal sleeve 20, the through hole 54 of the circumferential groove 106 is formed in the inner space of the bag-like first rubber elastic film 38, that is, in the first equilibrium chamber 60. Is open.

  Furthermore, here, a communication passage 108 is formed between the outer peripheral surface of the connecting rubber portion 36 and the inner peripheral surface portion of the metal sleeve 20 facing the connecting rubber portion 36, and the first equilibrium is achieved via this communication passage 108. The chamber 60 and the second equilibrium chamber 62 are communicated with each other. In other words, in the present embodiment, the first equilibrium chamber 60, the second equilibrium chamber 62, and the communication path 108 substantially constitute one equilibrium chamber 110.

  Then, the outer cylinder fitting 14 is extrapolated and fixed to the metal sleeve 20, so that the pressure receiving chamber 58 is one orifice passage formed by the circumferential groove 106 of the orifice forming member 50. The incompressible fluid enclosed in the interior of the pressure receiving chamber 58 and the equilibrium chamber 110 is caused to flow to each other through the orifice passage 112. That is, here, only one vibration system is formed by the pressure receiving chamber 58, the equilibrium chamber 110, and the orifice passage 112.

  Thus, in the engine mount 100 according to the present embodiment, the inner cylinder fitting 12 and the outer cylinder fitting 14 are attached to each of the body and the power unit, and the abbreviations are provided between the inner and outer cylinder fittings 12 and 14. When a vibration in the radial direction that is an eccentric direction is input, a fluid flow through the orifice passage 112 is generated between the pressure receiving chamber 58 and the equilibrium chamber 110, thereby causing a fluid action such as a resonance action of the fluid. Anti-vibration effect is demonstrated.

  Thus, in this embodiment, in particular, the spring stiffness assisting member 68 extends at both ends in the width direction of the second extending plate portion 90 in the connecting portion 74, and the deformable portion 70 extends toward both sides in the width direction. Each one is formed integrally so as to be put out. Then, such a spring stiffness assisting member 68 places one of the two deformable portions 70, 70 in the first gap 42, and another one of the deformable portions 70, In the state of being accommodated in the second gap 46, the fixing portion 72 is fixed so as to be able to move integrally with the inner tube fitting 12. In addition, the accommodation form of the two deformable parts 70 and 70 in the first and second gaps 42 and 46 and the fixing form of the fixing part 72 to the inner tube fitting 12 are the same as those in the above embodiment. ing. As a result, the first rubber elastic film 38 and the second rubber elastic film 40 in the film-like rubber portion 34 are assisted by the deformable portions 70 of the spring rigidity auxiliary member 68 to increase the spring rigidity. It is supposed to be.

  As described above, even in the present embodiment, the spring rigidity of the first rubber elastic film 38 and the second rubber elastic film 40 is increased by the respective deformation portions 70 of the spring rigidity auxiliary member 68. Therefore, by appropriately changing the spring rigidity of each of the deformable portions 70, the thickness of the first and second rubber elastic films 38, 40 is not changed, that is, a plurality of types of molds. Therefore, the resonance frequency of the fluid in the vibration system including the pressure receiving chamber 58, the equilibrium chamber 110, and the orifice passage 112 can be easily tuned.

  Therefore, in the engine mount 10 of this embodiment as described above, a stable vibration-proofing effect with respect to input vibration in a desired frequency range can be easily achieved by simply adjusting the spring rigidity of the spring rigidity auxiliary member 68. It is definitely obtained. Moreover, such a stable anti-vibration effect can be advantageously realized at the lowest possible cost.

  As mentioned above, although one Embodiment of this invention was explained in full detail, this is an illustration to the last, Comprising: This invention is not limited at all by the specific description regarding this Embodiment.

  For example, the structure of the spring stiffness assisting member 68 is disposed inside the first gap 42 and the second gap 46 so as to be able to move integrally with the inner cylinder fitting 12 as the shaft member, and the first rubber elastic film 38. As long as the spring rigidity of the second rubber elastic film 40 can be increased, the present invention is not limited to the examples.

  That is, for example, as shown in FIG. 8, a rubber elastic plate having a fixing portion 72 and a connecting portion 74, and having one or more deformed portions 70 (here, two) bent portions 80. It is also possible to configure only one of 114. As a result, the structure of the spring stiffness assisting member 68 can be further simplified. Of course, the deformable portion 70 can also be configured by other than the rubber elastic plates 82, 84, 114.

  Further, the spring stiffness assisting member 68 is positioned at least inside the first gap 42 and the second gap 46, and the elasticity of the first first rubber elastic film 38 and the second rubber elastic film 40. The part that is elastically deformed along with the deformation only needs to be formed of an elastic material, and the forming material of the other parts is not particularly limited. Therefore, the fixing portion 72 and the connecting portion 74 other than the deformable portion 70 can be formed using a resin material in addition to the exemplified metal material. Even if the whole spring stiffness assisting member 68 is formed using an elastic material, there is no problem.

  Furthermore, if the design is possible, the connecting portion 74 may be omitted, and the deformable portion 70 may be formed directly on the fixed portion 72.

  In addition, a ring portion having an outer diameter that is slightly smaller than the inner diameter of the metal sleeve 20 with respect to the connecting portion 74 of the spring stiffness assisting member 68 is arranged in the radial direction with respect to the annular plate-shaped fixing portion 72. The ring portion is integrally formed in a state of being eccentrically positioned at a predetermined distance, and the outer peripheral surface of the ring portion is opposed to the inner peripheral surface of the metal sleeve 20 at a predetermined interval. The spring stiffness assisting member 68 may be attached to the inner tube member 14 so as to be integrally movable. As a result, an excessive load was applied in the direction perpendicular to the bounce direction and the rebound direction between the inner and outer cylinder fittings 12 and 14 under the state in which the spring rigidity auxiliary member 68 is attached to the inner cylinder fitting 14. Even in this case, the ring portion is brought into contact with the metal sleeve 20 or the outer cylinder fitting 14, so that the relative displacement amount of the inner and outer cylinder fittings 12, 14 and the elastic deformation amount of the main rubber elastic body 16 are limited. It has become. That is, it is possible to make the ring portion function as a side stopper. Moreover, this ring part can also be utilized as a heat shield for blocking the influence of heat from the outside on the main rubber elastic body.

  Further, the structure for fixing the spring stiffness auxiliary member 68 to the inner cylindrical metal member 12 is not particularly limited as long as it can move integrally therewith.

  Further, the number and structure of the pressure receiving chamber 58, the equilibrium chambers 60, 62, and 110, and the orifice passages 64, 66, and 112 are not limited to those of the above-described embodiment.

  In addition, the present invention can be applied to any of the fluid-filled cylindrical mounts in automobile differential mounts, body mounts, suspension bushings, and other various mechanical devices in addition to the illustrated automotive engine mounts. Of course, it is applicable.

  In addition, although not enumerated one by one, the present invention can be carried out in an embodiment to which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.

It is a cross-sectional explanatory drawing which shows one Embodiment of the fluid-filling type cylindrical mount according to this invention. It is explanatory drawing which shows the attachment state to the vehicle of the fluid filling type | mold cylindrical mount shown by FIG. It is front explanatory drawing which shows an example of the spring rigidity auxiliary | assistance member assembled | attached to the fluid filled type cylindrical mount shown by FIG. It is A arrow explanatory drawing in FIG. FIG. 3 is an explanatory diagram of a semi-cylindrical section in the OB section of FIG. FIG. 3 is an explanatory diagram of a semi-cylindrical cross section in the O-C cross section of FIG. 2. FIG. 6 is a view corresponding to FIG. 1 showing another embodiment of the fluid-filled cylindrical mount according to the present invention. It is a figure corresponding to FIG. 3 which shows another example of the spring rigidity auxiliary | assistance member assembled | attached to the fluid filled type cylindrical mount according to this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,100 Engine mount 12 Inner cylinder metal fitting 14 Outer cylinder metal fitting 16 Main body rubber elastic body 38 1st rubber elastic film 40 2nd rubber elastic film 42 1st space | gap 46 2nd space | gap 58 Pressure receiving chamber 60 1st equilibrium Chamber 62 Second pressure receiving chamber 64 First orifice passage 66 Second orifice passage 68 Spring stiffness auxiliary member 70 Deformation portion 72 Fixing portion 74 Connection portion 80 Bending portion 82, 84 Rubber elastic plate 110 Equilibrium chamber 112 Orifice passage

Claims (6)

A shaft member attached to one of the two members to be anti-vibrated and a shaft member disposed at a predetermined distance outward from the shaft member in a direction perpendicular to the axis and attached to the other of the two members. While the outer cylinder member is connected by a main rubber elastic body interposed therebetween, a part of the wall portion is interposed between the shaft member and the outer cylindrical member by the main rubber elastic body. A pressure receiving chamber is formed, and an equilibrium chamber in which a part of a wall portion is formed by a rubber elastic film provided through a gap between the main body rubber elastic body and the pressure receiving chamber. The pressure receiving chamber and the equilibrium chamber are formed separately, and the pressure receiving chamber and the equilibrium chamber are communicated with each other through the orifice passage. When the vibration is input, the incompressible fluid enclosed in each of the pressure receiving chamber and the equilibrium chamber is And a flow configured to be able to flow through each other through the orifice passage. In filled cylindrical mount,
A spring rigidity auxiliary member formed using an elastic material is formed in the gap formed between the main rubber elastic body and the rubber elastic film to the two members of the shaft member and the outer cylinder member. The rubber elastic membrane can be moved integrally with the shaft member and can be elastically deformed in a state where the rubber elastic membrane is brought into contact with the rubber elastic membrane with a biasing force that biases it toward the inside of the equilibrium chamber. The spring stiffness assisting member is disposed on the rubber elastic membrane along with elastic deformation of the rubber elastic membrane based on the flow of the incompressible fluid between the pressure receiving chamber and the equilibrium chamber. The elastic rigidity of the rubber elastic film is increased by applying the biasing force to increase the spring rigidity of the rubber elastic film, while the shaft member moves away from the rubber elastic film more than a predetermined amount of movement. Move in large quantities When we are, the spring stiffness auxiliary member, the integral movement of the shaft member, the fluid-filled cylindrical mount, characterized in that is adapted to be brought away from the rubber elastic film.   A first equilibrium chamber in which a part of a wall portion is configured by a first rubber elastic film provided between the main rubber elastic body via a first gap, and the main rubber elastic body. The second rubber elastic film provided through the second gap in between is part of the wall, and is formed separately from the first equilibrium chamber in a non-communication state. The balance chamber constitutes the balance chamber, while the orifice passage communicates with the pressure receiving chamber and the first balance chamber, the pressure receiving chamber, and the second balance chamber. And a second orifice passage communicating with the chamber, and the spring stiffness assisting member is disposed inside one of the first gap and the second gap. The fluid-filled cylindrical mount according to 1.   The spring stiffness auxiliary member has a deformed portion including a rubber elastic plate having a curved portion bent or bent so as to be convex in the plate thickness direction, and the rubber elastic plate in the deformed portion In the gap, the spring stiffness auxiliary member is disposed in a state of being elastically deformed so that the curved portion is pushed and expanded under the contact between the main rubber elastic body and the rubber elastic film. 3. The fluid-filled cylindrical mold according to claim 1, wherein the fluid-filled cylindrical mold is elastically deformable in the gap while being in contact with the rubber elastic membrane with the urging force. mount.   The deformed portion of the spring stiffness assisting member is configured such that two of the rubber elastic plates are opposed to each other on the inner side surfaces of the curved portion, and are integrated on both side portions sandwiching the curved portion. The two rubber plates in the deformed portion are elastically deformed so that the respective bent portions are expanded in the gap, under the contact between the main rubber elastic body and the rubber elastic film. The fluid-filled cylindrical mount according to claim 3, wherein the fluid-filled cylindrical mount is disposed.   The spring stiffness assisting member is extrapolated to the shaft member and a deforming portion disposed so as to be elastically deformable in a state in which the spring stiffness assisting member is brought into contact with the rubber elastic film with the biasing force inside the gap. The fixed part fixed so that integral movement is possible, and the connection part which connects these deformation | transformation parts and fixed parts, It is comprised in any one of Claims 1 thru | or 4 comprised. Fluid-filled cylindrical mount. The connecting portion has a form extending outward in a direction perpendicular to the axis of the shaft member, and the shaft member and the outer cylinder member are brought into contact with the inner peripheral surface of the outer cylinder member at the time of vibration input. The fluid-filled cylindrical mount according to any one of claims 1 to 5, wherein a relative displacement amount in a direction perpendicular to the axis can be regulated.

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