JP2002286082A - Liquid sealed type active vibrationproof device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid sealed type active vibrationproof device having a novel structure capable of building up a separately formed actuator to a vibrationproof device body in a favorable workability. SOLUTION: A connection shaft 178 is provided to protrude from either oneside of an oscillation board 92 of the liquid sealed active vibrationproof device or output members 104, 106, 154 of the oscillation board 92 and the actuator 98 to the other side. A connection hole 180 is provided in which the connection shaft 178 is inserted at the other side of the output members 104, 105, 154 of the oscillation board 92 and the actuator 98. Further, an engaging means 188 allowing the connection shaft 178 to be inserted in the connection hole 180 and preventing it from slipping off is provided, and an urging means 186 is provided to urge the connection shaft 178 toward the slipping off direction out of the connection hole 180 and fixedly and axially hold the connection shaft 178 by the engaging means 188.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to, for example, an engine mount, a body mount, or a vibration damping device for an automobile.
The present invention relates to an active vibration isolator capable of exhibiting a positive or offset vibration damping effect against vibration to be damped, and in particular, vibrates a part of a wall of a pressure receiving chamber filled with an incompressible fluid. The present invention relates to a fluid-filled active vibration damping device which is constituted by a plate and which is driven to vibrate by an actuator to control the pressure in a pressure receiving chamber to obtain an active vibration damping effect.

[0002]

2. Description of the Related Art As a kind of a vibration isolating device as a vibration isolating connector or a vibration isolating support interposed between members constituting a vibration transmission system, a first mounting member and a second mounting member are formed of a main body rubber. While being connected by an elastic body, a part of a wall portion is constituted by a main rubber elastic body to form a pressure receiving chamber to which vibration is input, and the pressure receiving chamber is filled with an incompressible fluid, while a wall of the pressure receiving chamber is formed. Another part of the part is constituted by a vibrating plate, an actuator for driving the vibrating plate is provided, and the pressure is applied to the pressure receiving chamber by vibrating the vibrating plate. 2. Description of the Related Art Active vibration isolators of the type are known. Specifically, JP-A-2-42228, JP-A-10-47426, and JP-A-11-24
This is the vibration isolator described in, for example, Japanese Patent No. 7919.
Such an active vibration damping device, for example, suppresses vibration by applying an exciting force corresponding to the vibration to be damped to a member to be vibration-isolated, or suppresses the spring characteristic of the mount. Can be positively changed according to the input vibration to lower the dynamic spring, etc., so that a positive vibration damping effect against vibration can be obtained. Have been.

In such an active vibration isolator, an air pressure source is used as an actuator in addition to an electromagnet type or voice coil type vibrating means using a coil as described in the above-mentioned publications. Vibration means of a diaphragm type or the like are suitably employed. In addition, such an actuator generally has a first mounting member and a second mounting member connected to each other by a main rubber elastic body for reasons such as manufacturability of the vibration isolator, and the vibration is applied to the main rubber elastic body. The plate is formed separately from the vibration isolator main body, which forms a pressure receiving chamber in which a part of the wall is formed, and the output shaft of the separately formed actuator is moved with respect to the vibration plate of the vibration isolator main body. It is designed to be connected and fixed later.

However, conventionally, as described in the above-mentioned publication, the output shaft of the actuator is screwed and fixed to the vibration plate by a fixing bolt arranged coaxially in the axial direction. Therefore, there is a problem that the operation of fixing the output shaft of the actuator to the vibrating plate is troublesome and time-consuming. In addition, the reaction force at the time of screwing is applied to the vibration plate, so that the vibration plate may be damaged.

In Japanese Patent Application Laid-Open Nos. Hei 6-264955 and Hei 11-351313, a drive shaft projecting from a vibration plate toward an actuator is fixed.
The drive shaft and the output shaft of the actuator are overlapped in the direction perpendicular to the shaft, and the drive shaft and the output shaft are connected to each other with bolts or rivets inserted through the drive shaft in the direction perpendicular to the shaft, thereby tightening the connection work. There is disclosed a structure for preventing a vibration plate from being damaged due to a reaction force or the like.

However, in such a connection structure, it is necessary to insert a bolt or a rivet between the output shaft of the actuator and the drive shaft of the vibrating plate to perform a connection operation such as bolt tightening or riveting. There is a problem that it is difficult to secure a sufficient space for inserting a necessary tool or the like up to a connection portion by the bolt or the rivet, and there is still room for improvement in manufacturability.

[0007]

Here, the present invention has been made in view of the above-mentioned circumstances, and the problem to be solved is to provide an actuator separately formed with respect to a vibration isolator main body. An object of the present invention is to provide a fluid-filled active vibration isolator having a novel structure that can be assembled with good workability.

[0008]

The following describes aspects of the present invention made to solve the above-mentioned problems. The components employed in each of the embodiments described below can be employed in any combination as possible. In addition, aspects or technical features of the present invention are not limited to those described below, but are described in the entire specification and drawings, or based on the invention ideas that can be understood by those skilled in the art from the descriptions. It should be understood that it is recognized on the basis of.

That is, in a first aspect of the present invention, a part of a wall portion is formed by connecting the first mounting member and the second mounting member with the main rubber elastic body. Forming a pressure receiving chamber to which vibration is input, and filling the pressure receiving chamber with an incompressible fluid, while forming another part of the wall of the pressure receiving chamber with a vibration plate, A fluid that is provided on the opposite side of the pressure receiving chamber between the pressure receiving chambers and drives the vibration plate to vibrate, and that the pressure is controlled in the pressure receiving chamber by vibrating the vibration plate with the actuator. In the enclosed active vibration isolator, a connecting shaft protruding from one side of the vibration plate and the output member of the actuator toward the other side is provided, and the vibration plate and the output member of the actuator are provided. The other side has a connecting hole into which the connecting shaft is inserted. On the other hand, a locking means for allowing the connection shaft to be inserted into the connection hole and preventing the connection shaft from being pulled out is provided, and the connection shaft is urged in the direction of withdrawal from the connection hole so as to be engaged. A fluid-filled active vibration isolator provided with a biasing means for fixedly holding the connecting shaft in the axial direction by a stopping means is characterized.

In this embodiment, the connecting shaft is inserted into the connecting hole so that the connecting shaft is moved in the connecting hole based on the urging force exerted in the removal direction by the urging means. The positioning means is fixedly positioned and held at the position where the locking means has prevented the escape. Therefore, when assembling and connecting the output member of the actuator to the excitation plate, simply connecting the connection shaft provided on one of the output member of the actuator and the excitation plate,
It is only necessary to insert it into the connection hole provided on the other side, no special tools are required for assembly, and the connection work can be easily performed even in a narrow work space. The workability can be dramatically improved, and the manufacturability and cost can be improved based on the reduction in the number of parts.

Since the positioning and holding of the connecting shaft with respect to the connecting hole in the axial direction is performed by the locking means and the urging means, for example, when the connecting shaft is press-fitted and fixed in the connecting hole. It is not necessary to set a large insertion load to the connection hole of the connection shaft, and the work at the time of insertion is easy, and a large load input to other members can be avoided, and the member damage during manufacturing can be prevented. And the like can be reduced.

In this embodiment, at least one set of the connecting shaft and the connecting hole may be provided, but two or more sets may be provided, whereby the output of the actuator with respect to the vibrating plate is provided. The members can be connected more stably.

According to a second aspect of the present invention, there is provided a fluid-filled active type vibration damping device having a structure according to the first aspect, wherein a metal disk spring is used as the locking means.
The outer peripheral edge of the disc spring is fixedly supported on the peripheral wall of the connection hole, and the disc spring is curved so as to rise in the insertion direction of the connection shaft toward the inner peripheral side, By locking the inner peripheral edge of the disc spring to the outer peripheral surface of the connection shaft, relative displacement of the connection shaft in the insertion direction with respect to the connection hole is allowed, but the displacement of the connection shaft from the connection hole is allowed. Is characterized in that relative displacement in the pull-out direction is prevented.

In this embodiment, the connecting shaft is
When the insertion force is released when inserted into the connection hole against the urging force of the urging means, the connecting shaft is displaced in the pull-out direction by the urging force of the urging means. Then, immediately, the inner peripheral edge of the disc spring is hooked on the outer peripheral surface of the connecting shaft, and the disc spring is stretched, whereby displacement of the connecting shaft in the direction of coming out of the connecting hole is prevented. By adopting such a structure, it is possible to lock the connecting shaft at an arbitrary stepless insertion position into the connecting hole, whereby the biasing force is more advantageous as the positioning force of the connecting shaft. It can be used for

According to a third aspect of the present invention, there is provided a fluid-filled active vibration damping device having a structure according to the first aspect, wherein each of the connection shaft and the connection hole includes:
The locking position by the locking means in the direction in which the connecting shaft is pulled out from the connecting hole is fixedly determined. In this aspect, since the engagement position of the connection shaft with respect to the connection hole can be set at a fixed position, the relative position of the actuator with respect to the vibration plate can be set stably. Therefore, by allowing the actuator to be fixedly supported by the second mounting member, the initial position of the vibration plate can be set with high precision via the actuator. In order to fixedly determine the locking position of the locking means in both the connecting shaft and the connecting hole in the direction in which the connecting shaft is extracted from the connecting hole,
For example, a relative locking structure with hook-shaped locking claws on both the connecting shaft and the connecting hole, or a straddle between circumferential grooves provided on both the outer circumferential surface of the connecting shaft and the inner circumferential surface of the connecting hole. Therefore, it can be advantageously realized by an engagement structure in which the C-ring is engaged.

According to a fourth aspect of the present invention, there is provided a fluid-filled active vibration isolator having a structure according to any one of the first to third aspects, wherein the urging means includes In controlling the pressure of the chamber, an urging force greater than the excitation driving force applied from the actuator to the excitation plate can be applied to the connection shaft, and the insertion shaft can be inserted into the connection hole to assemble the connection shaft. It is characterized in that an urging force smaller than the external force can be applied to the connecting shaft. In this aspect, the connecting shaft can be easily inserted into the connecting hole to the locking position against the urging force and against the driving force. The relative displacement in the axial direction at the connection portion of the connection hole is prevented, and the transmission efficiency of the excitation driving force can be advantageously secured.

In the present invention, as the urging means, any of various conventionally known elastic materials such as a rubber elastic body or a metal spring member, specifically, a coil spring or a disc spring can be adopted. For example, while the insertion tip portion of the connection shaft is tapered and tapered, the connection hole is formed as a bottomed hole, and between the bottom of the connection hole and the tapered tip portion of the connection shaft. A configuration in which urging means such as a rubber elastic body, a coil spring, and a disc spring are interposed can be advantageously employed. If such an arrangement structure of the urging means is adopted, the urging means can be easily arranged in a small space.

According to a fifth aspect of the present invention, there is provided a fluid-filled active vibration isolator having a structure according to any one of the first to fourth aspects, wherein the actuator is housed in a cup-shaped holding fitting. The actuator is fixedly supported on the second mounting member via the holding metal fitting by fixing the peripheral edge of the opening of the holding metal fitting to the second mounting member. That is the feature. In this embodiment, a mount body having a pressure receiving chamber in which a part of a wall portion is constituted by a main rubber elastic body and a vibration plate, and an actuator for applying a driving force to the vibration plate are separately formed. Then, after inserting the vibration plate and the output member of the actuator in the mount body into the vibration plate and connecting them, the mounting bracket is attached so as to cover the actuator, and the holding bracket is fixed to the second mounting member. You can do it. Alternatively, a mounting body provided with a pressure receiving chamber in which a part of a wall portion is constituted by a main rubber elastic body and a vibrating plate, and an actuator for applying a driving force to the vibrating plate are separately formed, and a holding bracket is formed. After accommodating and fixing the actuator, when the peripheral edge of the opening of the holding fitting is overlapped and mounted on the second mounting member, the output member of the actuator is inserted into the vibration plate and connected, and thereafter, It is also possible to fix the peripheral edge of the opening of the holding fitting to the second mounting member by caulking or the like. And, in this aspect, the cup-shaped holding fitting that covers the actuator can be easily assembled to the mount main body without impairing the assembling workability of the actuator.

According to a sixth aspect of the present invention, there is provided a fluid-filled active vibration isolator having a structure according to any one of the first to fifth aspects, wherein the second mounting member has a cylindrical portion. And the first mounting member is spaced apart on one opening side of the cylindrical portion, and the cylindrical rubber elastic body elastically connects the first mounting member and the second mounting member. Closing the one opening of the shape part in a fluid-tight manner,
The other opening side of the cylindrical portion is closed in a fluid-tight manner with an easily deformable flexible film, and the vibrating plate is disposed between the main rubber elastic body and the opposing surfaces of the flexible film. And the pressure receiving chamber is formed on the rubber elastic body side of the main body with the vibrating plate interposed therebetween, and the incompressible fluid is formed on the flexible membrane side. Is formed, and an orifice passage for communicating the pressure receiving chamber and the equilibrium chamber with each other is provided, and the flexible membrane projects from the vibration plate through the flexible membrane in a fluid-tight manner. Along with providing a protrusion, the actuator is disposed on the opposite side of the equilibrium chamber across the flexible membrane, and the actuator is fixedly supported on the second mounting member,
The connecting shaft is provided on one of the projecting portion of the vibrating plate and the output member of the actuator, and the connecting hole is provided on the other.

In the fluid-filled active vibration damping device having the structure according to this embodiment, the resonance effect of the fluid that is caused to flow through the orifice passage based on the pressure difference between the pressure receiving chamber and the equilibrium chamber is used. In addition, the passive or active adjustment or control of the pressure fluctuation of the pressure receiving chamber at the time of vibration input can be performed more efficiently, and the intended vibration isolation performance can be further improved. In such a fluid-filled active vibration isolator, when the actuator is disposed on the side of the vibration plate where the equilibrium chamber is formed, the flexible membrane is formed so as to penetrate the flexible membrane in a fluid-tight manner. Adopting a protruding part and connecting the actuator and the vibrating plate by the protruding part, the vibrating mechanism of the vibrating plate by the electromagnet type driving means etc. is advantageous while ensuring a high fluid tightness of the equilibrium chamber. It can be realized in.

Further, in the fluid-filled active vibration isolator of the present embodiment, the output member of the actuator and the vibration plate can be rigidly connected to each other even if an equilibrium chamber is formed therebetween. Therefore, the driving force of the actuator can be exerted on the vibrating plate by a rigid transmission path by the protruding portion without passing through the flexible membrane or the fluid, thereby allowing the vibrating plate to be driven. Improvements in transmission efficiency and control accuracy of the vibration plate can be achieved.

According to a seventh aspect of the present invention, there is provided a fluid filled active vibration isolator having a structure according to the sixth aspect, wherein an elastic rubber plate is adhered to the vibrating plate. The vibrating plate is elastically supported by the plate so as to be displaceable with respect to the second mounting member. It is characterized in that it is formed separately from the plate and the flexible film is adhered to the projecting portion. In this embodiment, the elastic rubber plate for elastically supporting the vibrating member and the flexible film having the protruding portion penetrated in a fluid-tight manner can be separately vulcanized. Therefore, the elastic rubber plate and the flexible membrane can be easily designed individually and with a large degree of freedom in terms of material, shape and the like.

Still further, according to an eighth aspect of the present invention, in the fluid-filled active vibration isolator having the structure according to any one of the first to seventh aspects, the second mounting member is It is characterized in that a stopper member that is fixedly provided and limits displacement of the vibration plate toward the pressure receiving chamber is provided. In this aspect, when the connection shaft provided on one of the vibration plate and the output member of the actuator is inserted and connected to the connection hole provided on the other, the insertion force is applied to the vibration plate. In this case, the amount of displacement of the vibrating plate is limited by the stopper member, and therefore, damage caused to the elastic member or the like which allows the vibrating plate to be elastically displaceable is also reduced. In addition, the connection shaft can be inserted into the connection hole with a large insertion force, and workability can be improved.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an engine mount 10 for an automobile according to a first embodiment of the present invention. In this engine mount 10, a first mounting member 12 as a first mounting member and a second mounting member 14 as a second mounting member are arranged so as to be spaced apart from each other and opposed to each other. It is elastically connected by the interposed main body rubber elastic body 16. The engine mount 10 is configured such that the first mounting bracket 12 is mounted on a power unit (not shown) and the second mounting bracket 14 is mounted on an automobile body (not shown), so that the power unit is supported on the body by vibration isolation. It has become. Further, under such a mounted state, the engine mount 10 is subjected to a shared load of the power unit, so that the first mounting member 12 and the second mounting member 14 move in a direction approaching each other. 16 are elastically deformed, and the first mounting brackets 1
The main vibration to be damped in the approach / separation direction between the second and second mounting brackets 14 is input. In the following description, the vertical direction refers to the vertical direction in FIG. 1 in principle.

More specifically, the first mounting member 12 has a disk shape extending in a direction perpendicular to the axis, and the leg of the mounting bolt 18 is press-fitted into an insertion hole provided at the center thereof. It is fixed and protrudes upward in the axial direction. A stopper plate 20 having a substantially disk shape and a diameter larger than that of the first mounting bracket 12 is externally fixed to the mounting bolt 18 at a center hole 22 of the mounting bolt 18. The mounting bracket 12 is closely superimposed on the upper surface of the mounting bracket 12 and is disposed so as to extend in a direction perpendicular to the axis. The outer peripheral edge of the stopper plate 20 protrudes radially outward from the first mounting bracket 12, and the first buffer rubber 24 is attached to the protruding portion, so that the stopper portion 26 is formed. Is formed. The first mounting bracket 12 to which the stopper plate 20 is assembled is fixedly mounted to a power unit (not shown) by mounting bolts 18.

On the other hand, the second mounting member 14 includes a first cylindrical member 28 and a second cylindrical member 30 which form a cylindrical portion. The first cylindrical fitting 28 has a large-diameter, substantially cylindrical shape, and has a tapered connection in which an upper end portion in the axial direction is bent in a constricted shape, and an opening portion expands in a tapered shape in the axially upward direction. On the other hand, a cylindrical caulking portion 36 whose diameter is increased by the step portion 34 is formed integrally with the lower end portion in the axial direction. On the other hand, the second cylindrical metal fitting 30 has each opening peripheral edge at both ends in the axial direction bent radially outward, and has a first flange portion 38 at an upper portion in the axial direction and a first flange portion at a lower portion in the axial direction. The second flange portions 40 are integrally formed. The first and second tubular fittings 28 and 30 are overlapped with each other in the axial direction, and the swaged portion of the first tubular fitting 28 is placed on the first flange 38 of the second tubular fitting 30. The second mounting member 14 having a substantially cylindrical shape as a whole is formed by caulking and fixing the 36. In addition, the second mounting bracket 1
Reference numeral 4 denotes a second flange portion 40 of the second cylindrical metal fitting 30, which is attached to an automobile body (not shown).

The first mounting member 12 and the second mounting member 14 are arranged on the same central axis so as to be separated from each other and are opposed to each other. They are elastically connected by an elastic body 16.

The main rubber elastic body 16 has a substantially truncated conical shape as a whole, and the first mounting member 12 is superposed and vulcanized and bonded to the small diameter side end surface, while the large diameter rubber elastic body 16 has a large diameter. The tapered connecting portion 32 of the first cylindrical fitting 28 is superposed and vulcanized and bonded to the outer peripheral surface of the side end portion.
In short, the main rubber elastic body 16 is attached to the first mounting bracket 12.
It is formed as an integral vulcanized molded product having a second mounting member 14 and a second mounting member 14. The large-diameter end surface of the main rubber elastic body 16 is provided with a mortar-shaped recess 42 that opens downward in the axial direction, and the tensile stress generated in the main rubber elastic body 16 when a power unit load is input. It is being reduced.

Further, on the peripheral edge of the opening of the tapered connecting portion 32 of the first cylindrical metal fitting 28, a second radially outwardly extending and axially opposed position to the stopper 26 of the stopper plate 20. One stopper contact portion 44 is formed integrally, and a second cushion rubber 46 is formed on the outer surface of the first stopper contact portion 44 in the axial direction.
Then, the stopper portion 26 of the stopper plate 20 and the first stopper abutment portion 44 of the first metal fitting 28 abut on each other via the first and second cushion rubbers 24 and 46, thereby providing the first mounting. The amount of relative displacement of the metal fitting 12 and the second mounting metal 14 in the approach direction in the axial direction is limited in a buffered manner.

Furthermore, a large-diameter cylindrical stopper cylindrical metal member 50 extending upward in the axial direction is provided on the outer peripheral surface of the cylindrical portion of the first cylindrical metal member 28 by a bracket 48 projecting radially outward. Are fixedly supported. The stopper cylindrical metal member 50 extends toward the first mounting member 12 so as to cover the outer peripheral surface of the main rubber elastic body 16 at a distance, and the distal end portion thereof is bent inward. A second stopper contact portion 52 is formed to be axially opposed to the stopper portion 26 of the plate 20. Then, the stopper portion 26 of the stopper plate 20 and the second stopper contact portion 52 of the stopper tube fitting 50 are provided.
However, by abutting via the first cushion rubber 24, the relative displacement amount in the axial separation direction between the first mounting bracket 12 and the second mounting bracket 14 is buffered. Has become.

Further, as described above, the main rubber elastic body 16 is vulcanized and adhered to the first mounting bracket 12 and the second mounting bracket 14, so that the upper opening of the second mounting bracket 14 has the rubber elastic body. The body 16 is fluid-tightly closed. Further, in the second mounting member 14, a diaphragm 54 and a partition member 56 are accommodated and arranged so as to extend in a direction substantially perpendicular to the axis.

The diaphragm 54 as a flexible film is formed of a thin rubber elastic film which is easily deformed, and has a connecting part 5 as a protruding part penetrating from the front to the back at the center.
8 is vulcanized and bonded to the outer peripheral edge, and a substantially annular support metal fitting 60 is vulcanized and bonded. Note that the diaphragm 54 is provided with a radial slack so that elastic deformation is easily allowed.

The outer peripheral edge of the diaphragm 54 is supported by the second mounting member 14 by caulking and fixing the supporting member 60 between the first and second cylindrical members 28 and 30 in a fluid-tight manner. As a result, the lower opening of the first tubular metal fitting 28 constituting the second mounting fitting 14 is closed by the diaphragm 54 in a fluid-tight manner. Thus, a fluid chamber in which the incompressible fluid is sealed in a fluid-tight manner with respect to the external space between the opposing surfaces of the main rubber elastic body 16 and the diaphragm 54 inside the first cylindrical fitting 28. Are formed. In addition, as the incompressible fluid to be enclosed, for example, water, alkylene glycol,
Polyalkylene glycol, silicone oil, or the like can be employed. In particular, a low-viscosity fluid having a viscosity of 0.1 Pa · s or less is desirable in order to effectively obtain an anti-vibration effect based on the resonance action of the fluid described below. Note that an air chamber 62 that allows the deformation of the diaphragm 54 is formed inside the second cylindrical metal fitting 30 located on the opposite side of the diaphragm 54 from the fluid chamber.

The partitioning member 56 is composed of a thick partitioning member main body 64 having a substantially disc shape and a lid member 66 having a thin disk shape closely overlapped on the upper surface of the partitioning member main body 64. It is configured. The partition metal fitting 56 is press-fitted into the first tubular metal fitting 28 constituting the second mounting fitting 14, and the outer peripheral edge of the lid fitting 66 is
While being pressed through the rubber elastic layer by the tapered connecting portion 32 of the first tubular metal fitting 28, the partition fitting body 64
An annular radial projection 68 projecting from the lower peripheral edge of the
A diaphragm 54 is provided between the first and second cylindrical fittings 28 and 30.
Is fixedly assembled to the second mounting bracket 14 by caulking and fixing together with the supporting bracket 60. A seal rubber layer 70 is formed on substantially the entire inner peripheral surface of the first cylindrical metal fitting 28, and the outer peripheral surface of the partition metal fitting 56 is fluid-tight with respect to the second mounting metal fitting 14. It is pressed.

Thus, the fluid chamber formed in the first tubular fitting 28 is fluid-tightly divided into two portions on both sides in the axial direction with the partition fitting 56 interposed therebetween. Has a part of the wall portion composed of the main body rubber elastic body 16,
A pressure receiving chamber 72 in which a pressure change is caused based on the elastic deformation of the main rubber elastic body 16 at the time of vibration input is formed, and a part of a wall portion is formed by a diaphragm 54 below the partitioning member 56 in the axial direction. An equilibrium chamber 74 is formed, which is configured to easily allow a change in volume based on the deformation of the diaphragm 54.

In the central part of the partition fitting body 64,
A central recess 76 that opens downward in the axial direction and a small recess 78 that opens upward in the axial direction are formed, and the central recess 76 and the small recess 78 form a bottom wall that partitions the two recesses 76, 78. The plurality of portions 79 communicate with each other by a plurality of through holes 80. Further, a through hole 90 is formed in a central portion of the cover metal fitting 66 so as to penetrate in the thickness direction.

Furthermore, the central recess 7 of the partition fitting body 64
6 is provided with a vibration fitting 92 as a vibration plate. The vibrating metal fitting 92 has a substantially inverted cup shape having a bottom wall portion smaller in diameter than the central recess 76, and an outer peripheral surface of the cylindrical wall portion is formed as an elastic rubber plate spreading radially outward. The vibrating support rubber 94 having a substantially annular plate shape is vulcanized and bonded, and a substantially cylindrical mounting bracket 96 is vulcanized and bonded to the outer peripheral surface of the vibrating support rubber 94. In short, the vibration support rubber 94 is formed as an integrally vulcanized molded product having the vibration fitting 92 and the mounting fitting 96 arranged on the same central axis. Then, the mounting bracket 96 is connected to the partition fitting main body 6.
The vibration fitting 92 is assembled to the partition fitting 56 in a state where the vibration fitting 92 is press-fitted and fixed in the central recess 76 of the fourth part 4 so as to spread in the direction perpendicular to the axis in the central recess 76 and partition fluid-tightly. The vibrating metal member 92 is disposed opposite to the bottom wall portion 79 of the partition member main body 64 at a predetermined distance in the axial direction, and the amount of upward displacement of the vibrating metal member 92 is determined by the amount of the vibration supporting rubber. It is limited by the contact with the bottom wall portion 79 with the substantially annular buffer rubber 91 integrally formed with the 94 interposed therebetween. In other words, the bottom wall 7 of the partition fitting body 64
9 is configured as a stopper member of the vibration fitting 92, and the bottom wall 79 as a stopper member of the vibration fitting 92 (vibration support rubber 94) and the partition fitting body 64 is formed by the cushion rubber 9.
By contacting via the first member 1, the amount of displacement of the excitation metal fitting 92 toward the pressure receiving chamber 72 is limited in a buffered manner. Further, the vibration fitting 92 is externally fitted and fixed to an upper end portion of the connecting fitting 58 fixedly disposed through the center of the diaphragm 54.

As a result, a vibration chamber 95 is formed on the upper side of the vibration fitting 92 by the central recess 76.
The equilibrium chamber 74 is formed below the vibration fitting 92. Further, the vibration chamber 95 is communicated with the pressure receiving chamber 72 by a through hole 80 and a small recess 78 of the partition fitting main body 64 and a through hole 90 of the lid fitting 66. In the present embodiment, in particular, in the present embodiment, the through holes 80 When the passage cross-sectional area formed by the small recess 78 and the through hole 90 is set to be sufficiently large, the vibration chamber 95 substantially functions as a part of the pressure receiving chamber 72, The pressure receiving chamber 72 is the vibration chamber 9
5 is partially included.

Further, a peripheral groove 82 is formed in the outer peripheral portion of the partition fitting main body 64 at a predetermined length in the circumferential direction around the central concave portion 76 and the small concave portion 78. Then, the lid fitting 66 is closely overlapped on the upper surface of the partition fitting main body 64, and the peripheral groove 82 is covered by the first cylindrical fitting 28 being closely placed and overlapped on the outer peripheral surface of the partition fitting main body 64. Thus, an orifice passage 84 extending at a predetermined length in the circumferential direction is formed. The orifice passage 84 has one end in the circumferential direction opened and communicated with the equilibrium chamber 74 through a communication hole 86 penetrating through the partition fitting main body 64, and the other end in the circumferential direction has a lid fitting. The opening 66 is communicated with the pressure receiving chamber 72 through a communication hole 88 penetrating through the opening 66.

In the present embodiment, low-frequency vibration of an engine shake or the like is generated based on the resonance action of the fluid that is caused to flow through the orifice passage 84 based on the pressure difference between the pressure receiving chamber 72 and the equilibrium chamber 74 at the time of vibration input. The passage length, cross-sectional area, and the like of the orifice passage 84 are tuned so that an effective vibration damping effect is exhibited.

The pressure receiving chamber 72 and the equilibrium chamber 74 as described above are used.
An electromagnet type vibration device 98 as an actuator is disposed and assembled to the mount main body 97 provided below in the axially lower side of the second mounting member 14.
The electromagnet type vibration device 98 includes an inner shaft fitting 100 and an outer cylindrical fitting 1 which are coaxially arranged at a distance from each other in the radial direction.
02 based on the magnetic force between the inner magnetic pole 104 and the outer magnetic pole 106 formed on the inner shaft fitting 100 and the outer cylinder fitting 102, between the inner shaft fitting 100 and the outer cylinder fitting 102. A relative displacement force in the axial direction is exerted.

More specifically, the inner shaft fitting 100 is
It is formed of a ferromagnetic material such as iron, and has a small-diameter and thick-walled cylindrical shape as a whole having an inner hole 108 penetrating with a substantially constant cross-sectional area in the axial direction. Further, a thin cylindrical caulking portion 110 is provided at the upper end in the axial direction of the inner shaft fitting 100.
Are formed integrally with each other, and the lower end in the axial direction of the inner shaft fitting 100 is connected to the small-diameter fitting cylindrical portion 1 via the step surface 112.
14 is integrally formed, and a fixing bolt 1 extending axially downward is provided at an axial end portion of the fitting cylinder portion 114.
16 are integrally formed.

An annular coil 118 wound in the circumferential direction is attached to a central portion of the inner shaft fitting 100 in the axial direction. The outer peripheral surface of the coil 118 is
It is covered with an electrically insulating bobbin 120. Further, a slit-shaped notch 122 extending in the axial direction at a predetermined length from the upper end in the axial direction is formed in the inner shaft fitting 100, and a power supply inserted from the lower end opening through the inner hole 108 of the inner shaft fitting 100. A lead wire 124 is connected to the coil 118 from the notch 122.

Further, the upper and lower plate fittings 126 and 128 having a thick annular plate shape are extrapolated to the inner shaft fitting 100, and are superposed and fixedly disposed on both side surfaces of the coil 118 in the axial direction. Have been. These upper and lower sheet metal fittings 126, 1
Each of the members 28 is formed of a ferromagnetic material such as iron, and has an inner diameter slightly larger than the outer diameter of the inner shaft fitting 100 and an outer diameter slightly larger than the coil 118. The upper and lower sheet metal fittings 126 and 128 are fixed to the outer circumferential surface of the inner shaft fitting 100 on the respective inner circumferential surfaces, and are assembled so as to sandwich the coil 118 from both sides in the axial direction. In addition, the upper and lower sheet metal fittings 12
The upper and lower ring fittings 130 and 132 each having a cylindrical shape and made of a ferromagnetic material are axially superposed and abuttingly arranged on the outer peripheral edge portions of the respective 6,128 surfaces. That is, these upper and lower ring fittings 130 and 132
Are protruded inward in the axial direction from the outer peripheral edges of the upper and lower sheet metal fittings 126 and 128, respectively.
The bobbin 120 is fixed on the outer peripheral surface of the bobbin 18. The axially projecting distal end surfaces of the upper and lower ring fittings 130 and 132 are opposed to each other in the axial direction so as to be separated from each other, and the bobbin 120 is fixed between the opposed surfaces.

As a result, the inner shaft fitting 100 made of a ferromagnetic material is formed around the coil 118.
And upper and lower plate fittings 126 and 128 and upper and lower ring fittings 13
0 and 132 cooperate to form an inner yoke 134 having a substantially C-shaped cross section and extending over the entire circumference in the circumferential direction. Then, the power supply lead wire 1 is connected to the coil 118.
When power is supplied through the power supply 24, a magnetic field is generated by the magnetic action of the current, and the coil 118 functions as an electromagnet.
128 and an inner yoke 134 formed cooperatively by upper and lower ring fittings 130 and 132,
Magnetic poles are provided in accordance with the direction of energization of the power supply 18. That is, by supplying power to the coil 118, one of the upper and lower sheet metal fittings 126 (12
8), an N magnetic pole is constituted by the outer peripheral edge portion and the ring bracket 130 (132),
An S magnetic pole is formed by the outer peripheral edge of (126) and the ring fitting 132 (130). In short, in the inner yoke 134, both magnetic poles are formed by the outer peripheral edge of the upper metal fitting 126 and the upper ring metal fitting 130, and the outer peripheral edge of the lower metal fitting 128 and the ring metal fitting 132, and these upper metal fittings 126 are formed. The annular magnetic path is cut off between the outer peripheral edge and the upper ring fitting 130 and the outer peripheral edge of the lower plate fitting 128 and the ring fitting 132 to form a magnetic gap.

On the other hand, the outer cylinder fitting 102 is a pair of upper and lower outer yoke fittings 13 made of a ferromagnetic material such as iron.
6,138. Each of these outer yoke fittings 136 and 138 has a large-diameter substantially cylindrical shape, and is directly superimposed on the same central axis. And these upper and lower outer yoke fittings 13
6 and 138, a cover fitting 140 having a large diameter inverted cup shape is externally fitted and fixed, and the upper and lower outer yoke fittings 136, 1 with respect to the inner peripheral surface of the cylindrical wall portion of the cover fitting 140.
38 is fitted and fixed.

The upper and lower outer yoke fittings 136, 13
In FIG. 8, convex portions 142 and 144 projecting inward in the radial direction are formed integrally and continuously over the entire circumference in the axial middle portion. That is, in the outer cylinder fitting 102, the projection 142 formed in the upper outer yoke fitting 136 and the projection 144 formed in the lower outer yoke fitting 138 are positioned at a predetermined distance in the axial direction from each other. It is. And these pair of convex parts 142 and 144
The upper and lower sheet metal fittings 12 are
6, 128 and the upper and lower ring fittings 130, 132 are opposed to each other with a predetermined distance gap radially outward. Here, the inner peripheral surface 146 of the upper outer yoke fitting 136 is axially outward with respect to the inner upper magnetic pole surface 148 formed in cooperation with the outer peripheral faces of the upper plate fitting 126 and the upper ring fitting 130. (Upward). Meanwhile,
The inner peripheral surface 150 of the lower outer yoke fitting 138 is
The inner magnetic pole surface 152 is formed so as to be deflected axially outward (downward) with respect to the inner lower magnetic pole surface 152 formed in cooperation with the outer peripheral surfaces of the lower ring fitting 132 and the lower ring fitting 132.

Further, a ring-shaped permanent magnet 154 is fitted into the outer cylindrical fitting 102 at the axially butted portion of the upper and lower outer yoke fittings 136 and 138, and is fitted and fixed to the inner peripheral surface. . The permanent magnet 154 is magnetized in the radial direction, the inner peripheral surface 156 is one magnetic pole surface (N pole surface in this embodiment), and the outer peripheral surface 158 is the other magnetic pole surface (this embodiment). (S pole surface in the embodiment). The outer peripheral surface 158 has upper and lower outer yoke fittings 1.
36 and 138, while the inner peripheral surface 156 is positioned radially inward at the same height as the upper and lower convex portions 142 and 144 of the upper and lower outer yoke fittings 136 and 138. The inner-side upper magnetic pole surface 148 and the inner-side lower magnetic pole surface 15 formed on the inner shaft bracket 100 side.
The bobbin 120 disposed between the 0 axially opposed surfaces is spaced apart radially outward and is opposed to the bobbin 120.

Since the permanent magnet 154 is fixed to the outer cylinder 102 in this way, a magnetic path is formed by the permanent magnet 154 and the outer cylinder 102 in cooperation with each other. While one magnetic pole (N pole in this embodiment) surface is constituted by the peripheral surface 156, a pair of convex portions 142, 1 of the outer cylinder fitting 102 are formed.
The other magnetic pole (S pole in this embodiment) surface is constituted by the inner peripheral surfaces 146 and 150 of 44.

Further, the inner shaft metal fitting 100 and the outer cylindrical metal fitting 102 provided with the magnetic path as described above are provided on the upper and lower leaf springs 16 which are located on both sides in the axial direction and are arranged so as to extend in the direction perpendicular to the axis.
0,162 elastically connected. Each of the upper and lower leaf springs 160 and 162 has a thin annular plate shape made of spring steel or the like. An appropriate number of through-holes extending spirally from the outer periphery are formed. The upper leaf spring 160 is caulked and fixed at the inner peripheral edge to the upper end in the axial direction of the inner shaft fitting 100 by the caulking portion 110 and at the outer peripheral edge in the axial direction of the upper outer yoke fitting 136. It is clamped and fixed between the end face and the upper fixing ring 164 pressed into the cover fitting 140. On the other hand, the lower leaf spring 162 is superposed on the step surface 112 at the lower end in the axial direction of the inner shaft fitting 100 at the inner peripheral edge, and is held by a holding case 16 described later.
8 and at the outer peripheral edge,
Axial lower end face of lower outer yoke fitting 138 and cover fitting 1
It is clamped and fixed between lower fixing rings 166 press-fitted into 40.

The pair of upper and lower leaf springs 160,
The inner shaft member 100 and the outer tube member 102 are elastically connected at 162 so that the inner shaft member 100 and the outer tube member 102 are allowed to have an elastic relative displacement in the axial direction on substantially the same central axis. It is elastically connected.
In a static initial state where no special external force is applied, the inner shaft fitting 100 and the outer cylindrical fitting 102
Are set on substantially the same central axis so as to be the relative positions in the axial direction as described above. The inner shaft fitting 1
An elastic cap 165 is fitted and fixed to the upper end of the cover 00 in the axial direction, and is opposed to the upper bottom 167 of the cover fitting 140 in the axial direction. Thus, the abutment of the upper bottom portion 167 of the cover fitting 140 against the elastic cap 165 reduces the relative displacement of the inner shaft fitting 100 and the outer tubular fitting 102 in the axial direction due to the elastic deformation of the leaf springs 160 and 162. It is being restricted.

That is, in the electromagnet type vibration device 98 of this embodiment, the elastic force of the leaf springs 160 and 162, the inner upper and lower magnetic pole surfaces 148 and 152, and the outer magnetic pole surface when the coil 118 is not electrically connected. (146,150,
156), based on the balance of the magnetic force,
The holding force at the axial neutral position as described above and the axial return force to the neutral position are exerted on the outer cylindrical member 102 and the outer cylindrical member 102. Also, coil 1
18, the inner side upper and lower magnetic pole surfaces 14 are supplied.
8, 152 and the outer magnetic pole faces (146, 150, 15
6) Based on the magnetic force exerted during the inner shaft fitting 1
A relative driving force to one side in the axial direction according to the direction of current supply to the coil 118 is applied to the outer cylinder 102 and the outer cylinder 102. Therefore, the coil 118
To the inner shaft fitting 100 and the outer cylinder fitting 10 by supplying an alternating current, a pulse wave current, a pulse current, etc.
A relative exciting force in the axial direction with respect to 2 is generated as a driving force. As is clear from the above description, in the present embodiment, the inner magnetic pole 104 having the inner upper and lower magnetic pole surfaces 148 and 152 is provided.
The outer magnetic pole 106 having the outer magnetic pole surfaces (146, 150, 156) and the permanent magnet 154 constitute an output member of the electromagnet type vibration device 98.

Further, the electromagnet type vibration device 98 having such a structure is disposed so as to be located further below the equilibrium chamber with respect to the mount body 97, and has a large diameter cup shape. Holding case 168 as holding metal fitting
And is mounted on the mount body 97. In the holding case 168, an outward flange 170 is integrally formed on the periphery of the opening.
A fixing hole 172 is formed through the center of the bottom wall. Further, a cylindrical holding tube portion 174 extending upward in the axial direction is formed integrally with a peripheral portion of the fixing hole 172.

In the electromagnet type vibration device 98, the fitting cylinder portion 114 of the inner shaft fitting 100 is inserted into the holding tube portion 174 of the holding case 168 and inserted through the fixing hole 172. The holding cylinder part 174 is fitted into the fitting cylinder part 114 of
A fixing nut 176 is fastened and fixed to a fixing bolt 116 which is inserted through the fixing member 4 and protruded outward in the axial direction. Thus, the electromagnet type vibration device 98 is housed in the holding case 168 and is fixedly mounted on the same central axis as the holding case 168. Also, in such an attached state, a predetermined amount of displacement in the axial direction based on the elastic deformation of the upper and lower leaf springs 160 and 162 is elastically allowed in the outer cylinder fitting 102.

Further, the holding case 168 to which the electromagnet type vibration device 98 is attached is fitted into the second tubular fitting 30 constituting the second fitting 14, and the first and second tubular fittings 28, By fixing the flange portion 170 at the caulking fixing portion 30 with the caulking portion 36, the flange portion 170 is fixedly attached to the second mounting member 14 on the same central axis as the mount body 97.

Further, in the electromagnet type vibration device 98 assembled in this manner, the center of the bottom wall (upper bottom portion 167) of the cover fitting 140 fixed to the outer cylinder fitting 102 is fixed to the vibration fitting 92. It is opposed to the connection fitting 58 protruding downward in the axial direction in the axial direction. Further, a connection rod 178 as a connection shaft projecting axially upward toward the connection fitting 58 is fixed to a center portion of the upper bottom portion 167 of the cover fitting 140 by welding or the like. On the other hand, as described above, the connection fitting 58 is configured as a drive shaft that projects downward from the vibration fitting 92 in the axial direction by fitting the upper end portion to the vibration fitting 92. The connecting rod 178 and the connecting fitting 58 are connected and fixed to each other by inserting the connecting fitting 58 into a connecting hole 180 serving as a connecting hole formed in the connecting fitting 58.

More specifically, as shown in FIG. 1, the connecting rod 178 has a tip portion (an upper end portion in the axial direction).
Has a substantially circular rod shape with a tapered shape, is welded to the upper bottom portion 167 of the cover fitting 140, and protrudes substantially on the central axis of the cover fitting 140.

On the other hand, the connecting fitting 58 has a short columnar shape with a substantially circular cross section, and has a slightly larger diameter upper end fitted and fixed to the vibrating fitting 92, while a smaller diameter lower end. A connection hole 180 having a predetermined depth is formed in the portion so as to open downward in the axial direction. Further, a cylindrical caulking portion 184 whose diameter is increased by the step portion 182 on the inner peripheral side is formed integrally with the opening peripheral portion of the connection hole 180. On the other hand, in the connection hole 180, a rubber elastic body 186 having a substantially circular block shape as an urging means is press-fitted at the upper bottom. In the present embodiment, the height of the rubber elastic body 186 is substantially half the depth of the connection hole 180.

Further, on the periphery of the opening of the connection hole 180,
A disc spring 188 as a disc spring as a locking means is provided. The disc-shaped spring 188 is made of spring steel, has a substantially thin annular plate shape as a whole, and has a circular insertion hole 190 formed in the center. Further, three oval-shaped through holes 192 are formed around the insertion hole 190, and these through holes 192 are connected to and connected to the insertion hole 190.
Around the insertion hole 190, three through holes 192, 192,
Three leaf spring portions 195, 195, and 195 extending from the annular outer peripheral ring portion 193 inward in the radial direction are formed integrally with each other and located between 192.

The disc-shaped spring 188 is fitted in the connection hole 180 of the connection fitting 58 and disposed at the opening of the connection hole 180 so as to expand in the direction perpendicular to the axis. Are superimposed on a step 182 formed in the opening of the connection hole 180.
Further, a disc-shaped spring 188 superimposed on the step portion 182
A ring-shaped spacer 193 is superimposed on the outer peripheral ring portion 197 of the disk-shaped spring 188 because the caulking portion 184 of the connecting fitting 58 is caulked radially inward. The outer peripheral ring 193 is
2 between the caulking portion 184 and the spacer 193, and is fixed in the axial direction.

Further, a connecting rod 178 is inserted into the connecting hole 180 of the connecting metal fitting 58 from its opening and assembled. Here, the connecting rod 178
In the opening of the connection hole 180, the disc spring 188
And the connecting rod 1
The distal end of 78 is pressed against a rubber elastic body 186 disposed on the upper bottom of the connection hole 180. The inner diameter of the insertion hole 190 of the disc spring 188 is smaller than the outer diameter of the connecting rod 178 in a free state where no external force is applied.
90, the plate spring portions 195, 195, and 195 of the disc-shaped spring 188 are moved upward in the axial direction (the connection hole 1).
(The bottom direction of 80) so as to allow the connecting rod 178 to pass therethrough.

Further, when the connecting rod 178 is inserted into the insertion hole 190 of the disc spring 188, the insertion hole 190 is formed based on the elasticity of each of the leaf spring portions 195, 195, 195 of the disc spring 188. Of the connecting rod 178
Is pressed against the outer peripheral surface of the
Insertion direction of connecting rod 178 (bottom direction of insertion hole 190)
Is allowed, but the displacement of the connecting rod 178 in the pull-out direction can be immediately prevented by the locking action of the inner peripheral edge of the insertion hole 190 on the outer peripheral surface of the connecting rod 178. I have.

Further, the connecting rod 178 is connected to the connecting hole 18.
0, the connecting rod 1
Rubber elastic body 186 compressed and deformed at the tip of
Is constantly exerted on the connecting rod 178 in the direction of coming out of the connecting hole 180 based on the elasticity of the connecting rod 178. In short, since the urging force is exerted on the connecting rod 178, the locking force of the disc-shaped spring 188 to the inner peripheral edge of the insertion hole 190 of the disc-shaped spring 188 is stably exerted on the outer peripheral surface of the connecting rod 178. Has become
The disc-shaped spring 188 is always locked to a certain position of the connecting rod 178 and stretches, so that the connecting rod 1
The connecting rod 78 and the connecting fitting 58 are connected to each other so that the connecting rod 178 and the connecting fitting 58 cannot be displaced relative to each other in the output transmission direction (axial direction). -ing

In this embodiment, the rubber elastic body 178 is used.
The restoring force generated in the connection, in other words, the connecting rod 178
Is set to be larger than the excitation driving force applied from the electromagnet type vibration device 98 to the excitation metal fitting 92, the position is substantially fixed in the axial direction, and the connection with the connection rod 178 is performed. The metal fitting 58 is connected. The restoring force generated in the rubber elastic body 186 by slightly resiliently restoring the rubber elastic body 186 rather than the final external force applied for inserting the connecting rod 178 into the connecting hole 180 and assembling the connecting rod 178. In other words, the urging force applied to the connecting rod 178 is set to be small, and the connecting rod 17 of the rubber elastic body 186 is set to be small.
The slight restoring of the disc spring 8 from the final insertion position advantageously secures the holding force of the disc spring 188 in the locked state with respect to the connecting rod 178.

The connecting rod 178 as an output member of the electromagnetic vibrating device 98 is fixedly connected to the vibrating metal fitting 92 in this manner, thereby generating the electromagnetic vibrating device 98. The driving force to be tightened is the connecting rod 1
From 78, through the connecting fitting 58, and from the connecting fitting 58 to the vibrating fitting 92, the vibrating fitting 92 is reciprocally excited in the center axis direction. Then, as is well known, by vibrating the vibrating metal fitting 92 at a frequency and a phase corresponding to the vibration, the pressure in the pressure receiving chamber 72 can be positively controlled to obtain a desired vibration damping effect. You can do it.

As described above, the work of fixing the connecting rod 178 of the electromagnet type vibration device 98 to the connection fitting 58 was performed by holding the electromagnet type vibration device 98 in the holding case 168 and fixing it with the fixing nut 176. Later, the holding case 16
8 can be carried out, but more preferably, the electromagnet type vibration device 9
After holding the connecting rod 178 of the electromagnet-type vibrating device 98 alone with the connecting fitting 58 of the mount body 97, the holding case 168 is assembled. The inner shaft fitting 100 of the vibrating device 98 is fastened and fixed with a fixing nut 176, and the flange portion 170 of the holding case 168 is fixed to the second mounting fitting 1.
4 to be fixed.

Therefore, in the engine mount 10 having the above-described structure, the connecting rod 178 and the connecting fitting 58 can be connected to each other simply by inserting the connecting rod 178 into the connecting hole 180 of the connecting fitting 58. When the connecting rod 178 is inserted into the connecting hole 180 against the urging force of the rubber elastic body 186 and the insertion force is released, the connecting rod 178 is pulled out by the urging force of the rubber elastic body 186. In response to the displacement in the extension direction, the inner peripheral edge of the disc-shaped spring 188 (insertion hole 190) is immediately connected to the outer periphery of the coupling rod 178 as the connecting rod 178 is slightly restored in the extracting direction. The disc-shaped spring 188 stretches by being hooked on the surface, so that the relative displacement in the axial direction at the connecting portion between the connecting rod 178 and the connecting fitting 58 is prevented. From being integrally connected to the direction (in the figure, the vertical direction) direction of transmission of the output by the electromagnet type vibrator 98 relative displacement of, and thus capable of being substantially reliably prevented.

Therefore, in the engine mount 10 provided with such a connecting structure of the connecting rod 178 and the connecting fitting 58, the connecting rod 178 can be provided without a special tool such as a screwdriver, a wrench, or a caulking tool. Is simply inserted into the connection hole 180, so that the connection rod 178 and the connection fitting 58 can be easily connected and fixed.
Therefore, the connection between the connection rod 178 and the connection fitting 58 can be quickly and reliably performed even in a narrow work space, and the assembling workability can be further improved.

Further, since the connecting rod 178 and the connecting fitting 58 are connected by the locking force of the disc-shaped spring 188 to the connecting rod 178, which resists the urging force of the rubber elastic body 186, the connecting rod 178 and the connecting metal fitting 58 can be assembled. The effect of an excessive external force of the vibration fitting 92 on the vibration supporting rubber 94 can be reduced or prevented, and damage to the vibration supporting rubber 94 can be advantageously prevented.

In this embodiment, since the insertion hole 190 of the disc-shaped spring 188 is simply locked to the outer peripheral surface of the connecting rod 178, the connecting rod 178 can be freely connected to the connecting hole 180. It is also possible to lock at the stage insertion position, so that the relative position of the electromagnet type vibration device 98 with respect to the vibration fitting 92 does not need to be set with high accuracy, and the production becomes easy. Along with
Stable operation performance can be exhibited.

Next, an automotive engine mount according to a second embodiment of the present invention is shown in FIGS.
In the following description, members and parts having the same structure as the vehicle engine mount (10) as the first embodiment shown in FIG.
The same reference numerals as in the first embodiment denote the same in the drawings, and a detailed description thereof will be omitted.

That is, the engine mount in this embodiment is another specific example of the connection structure of the connection rod (178) provided in the electromagnet type vibration device 98 and the connection metal (58) fixed to the vibration metal 92. This is an example.

More specifically, as shown in FIG. 3, the connecting rod 194 as the connecting shaft has a substantially circular rod shape having a tapered tip end (upper end in the axial direction). The cover 140 is fixed to the upper bottom 167 of the cover 140 by welding or the like, and protrudes substantially on the center axis of the cover 140. The connecting rod 194 is formed with a concave groove-shaped locking groove 196 that is open to the outer peripheral surface in the vicinity of the distal end portion in the axial direction, and is formed continuously throughout the entire circumferential direction.

On the other hand, in the present embodiment, the connection fitting 58
In the vicinity of the opening peripheral edge of the connection hole 180, a concave groove-shaped engaging groove 198 that opens on the inner peripheral surface is formed continuously over the entire circumferential direction. Further, a C-shaped snap ring (retaining ring) 200 made of spring steel as a locking means is fitted into the connection hole 180, and the engagement groove 19 is formed.
8 and is disposed substantially fixed in the axial direction.
Note that the outer diameter of the snap ring 200 is
0 and smaller than the inner diameter of the bottom wall of the engagement groove 198. Then, the snap ring 200 presses and contracts the notch and inserts it into the connection hole 180, and at the position where the engagement groove 198 is formed,
0 is elastically restored to the original diameter, and is loosely inserted into the engagement groove 198. The snap ring 20
0 is smaller than the inside diameter of the connection hole 180 of the connection fitting 58, and the snap ring 20 is moved from the inner peripheral surface of the connection hole 180 radially inward by a fixed amount.
The inner peripheral edge of 0 is protrudingly positioned.

Further, on the bottom wall of the connection hole 180, a disc spring 202 as a disc spring as an urging means is arranged. The disc spring 202 has a thin annular plate shape made of spring steel, and has a tapered shape that curves and protrudes downward in the axial direction toward the inner peripheral side. The outer peripheral edge portion is overlapped with the upper bottom surface of the connection hole 180, and the central portion is positioned so as to protrude downward in the axial direction.

Thus, the connecting rod 194 and the connecting fitting 58 are mutually assembled in the axial direction simply by inserting the connecting rod 194 into the connecting hole 180 of the connecting fitting 58 as in the first embodiment. ing. That is, the connection rod 194 is inserted toward the connection fitting 58 while expanding the diameter of the snap ring 200 loosely inserted into the engagement groove 198. The distal end of the connecting rod 194 has a disc spring 202 disposed on the bottom wall of the connecting hole 180.
When the external force applied in the insertion direction of the connecting rod 194 is further applied to the inner peripheral edge of the
Is compressed and deformed, whereby the disc spring 202
Of the connecting rod 194 becomes an urging force exerted in the direction in which the connecting rod 194 is pulled out.
4 is about to be displaced in the withdrawal direction,
There, the inner peripheral edge of the snap ring 200 fits into the locking groove 196 of the connecting rod 194, and the connecting rod 1
Since the connection hole 94 and the connection hole 180 are mutually locked via the snap ring 200, displacement of the connection rod 194 in the pull-out direction from the connection hole 180 is prevented.
Accordingly, the connecting rod 194 and the connecting fitting 58 are connected based on the elasticity of the disc spring 202 such that relative displacement in the output transmission direction (mainly in the axial direction) is impossible.

In the present embodiment, the restoring force generated in the disc spring 202, in other words, the urging force applied to the connecting rod 194, is a driving force applied from the electromagnet type vibration device 98 to the vibration fitting 92. The force is set to be larger than the force, and is set to be smaller than the external insertion force for inserting the connecting rod 194 into the connecting hole 180 and assembling it. Thereby, the connecting rod 194 is easily moved to the mounting position of the snap ring 200 and the locking groove 196 against the biasing force against the connecting hole 180, in other words, to the locking position of the connecting rod 194 and the connecting hole 180. In addition to being able to be inserted, the relative displacement of the connecting rod 194 and the connecting hole 180 in the axial direction is further prevented against the vibration driving force, and the transmission efficiency of the vibration driving force can be advantageously secured.

Therefore, in the connection structure of the connection rod 194 and the connection fitting 58 as well, the same effects as those of the first embodiment can be effectively exhibited, and the connection of the electromagnet type vibration device 98 can be achieved. The connection between the rod 194 and the connection fitting 58 for drivingly displacing the vibration fitting 92 can be quickly and reliably performed even in a narrow work space.

Further, in this embodiment, the locking position of the connecting rod 194 with respect to the connecting hole 180 is fixed by the locking groove 196 of the connecting rod 194 and the snap ring 200, and further by the engaging groove 198 of the connecting hole 180. , The relative position of the electromagnet type vibration device 98 with respect to the vibration fitting 92 can be stably and fixedly set. Therefore, the electromagnet type vibration device 98 can be fixed.
Is fixedly supported by the second mounting member 14 so that the initial position of the vibrating bracket 92 can be changed to the electromagnetic vibrating device 98.
Can be set with high accuracy.

Next, an automobile engine mount according to a third embodiment of the present invention is shown in FIGS.
In the following description, members and parts having the same structure as that of the vehicle engine mount (10) according to the first or second embodiment will be described respectively.
In the drawings, the same reference numerals as those in the first or second embodiment denote the same parts, and a detailed description thereof will be omitted.

That is, the engine mount in this embodiment is different from the connection structure of the connecting rod (178, 194) provided in the electromagnet type vibration device 98 and the connection metal (58) fixed to the vibration metal 92. It shows a specific example of the above.

More specifically, as shown in FIG. 5, the connecting rod 204 as the connecting shaft has an upper portion (tip portion) in the axial direction having a substantially conical block shape over substantially half of the axial direction. And the lower portion in the axial direction has a substantially circular rod shape over substantially half of the axial direction, and the outer diameter of the bottom wall shape of the conical block shape is larger than the circular rod shape. The connecting rod 204
At the central portion in the axial direction of the
06 is formed. In short, the protruding tip portion of the connecting rod 204 has an arrowhead shape. The connecting rod 204 is connected to the upper bottom 1 of the cover fitting 140.
The cover member 140 is fixed to the cover 67 by welding or the like, and protrudes substantially on the center axis of the cover fitting 140.

On the other hand, in the present embodiment, the connecting fitting 58
A locking claw 208 as locking means is integrally formed at a lower end portion in the axial direction with respect to a portion of the cylindrical body forming the peripheral wall portion of the connection hole 180 in FIG. This locking claw 208
Has a hook-shaped claw 210 protruding radially inward. A plurality of slits 212 are formed in the peripheral wall portion of the connection hole 180 at a predetermined length in the circumferential direction and linearly extend from the lower end portion in the axial direction at a predetermined length. The peripheral wall portion 180 is substantially constituted by a plurality of locking claws 208 separated from each other in the circumferential direction. Thereby, each locking claw 208 can be elastically deformed particularly toward the inner peripheral side and the outer peripheral side of the connection hole 180.
A disc spring 202 as an urging means, which is a member similar to that of the second embodiment, is provided on the bottom wall of the connection hole 180.

Therefore, similarly to the first and second embodiments, the connecting rod 204 and the connecting fitting 58 can be mutually axially inserted simply by inserting the connecting rod 204 into the connecting hole 180 of the connecting fitting 58. Has been assembled.
That is, the connecting rod 204 is inserted into the connecting hole 180 while elastically bending the plurality of locking claws 208 constituting the peripheral wall of the connecting hole 180 toward the outer peripheral side. When the distal end portion of the connecting rod 204 is brought into contact with the inner peripheral edge of the disc spring 202 disposed on the bottom wall of the connecting hole 180, and further exerts an external force exerted in the insertion direction of the connecting rod 194, The disc spring 202 is compressed and deformed, whereby the restoring force of the disc spring 202 to return to the original shape becomes an urging force exerted in the pull-out direction of the connecting rod 194, and the connecting rod 204 moves in the pull-out direction. , Where the connecting rod 20
4 is locked by the tip claw portion 210 of the locking claw 208, whereby the connecting hole 180 of the connecting rod 204 is locked.
Is prevented from being displaced in the pulling-out direction. Thus, the connecting rod 204 and the connecting fitting 58 are connected so that relative displacement in the output transmission direction (mainly in the axial direction) is impossible.

Therefore, in the connection structure of the connection rod 194 and the connection fitting 58 as well, the same effects as those of the first and second embodiments can be effectively exhibited, and the electromagnetic excitation The connection of the connection rod 204 of the device 98 and the connection fitting 58 for drivingly displacing the vibration fitting 92 can be quickly and reliably performed even in a narrow work space.

Further, in the present embodiment, similarly to the second embodiment, the connecting hole 180 of the connecting rod 204 is provided.
Is locked to the stepped portion 206 of the connecting rod 204.
And the fixed position by the tip claw 210 of the connection hole 180, the relative position of the electromagnet type vibration device 98 with respect to the vibration fitting 92 can be set stably. By fixedly supporting the electromagnet type vibration device 98 with the second mounting member 14, the initial position of the vibration metal fitting 92 can be set with high precision via the electromagnet type vibration device 98. It becomes.

Although the embodiments of the present invention have been described in detail above, these are merely examples, and the present invention
By the specific description in these embodiments,
It is not to be construed as limiting.

For example, in the above-described embodiment, the urging means (rubber elastic body 186 and disc spring 202) for applying a urging force to the connecting rod in the pull-out direction from the connecting hole are all provided at the bottom wall of the connecting hole. Although it is arranged in the section, it is appropriately changed according to the required product shape and the like, and is not limited at all.

More specifically, for example, as shown in FIG. 7, in the automobile engine mount of the second embodiment, the disc spring (202) as the urging means is connected to the connection fitting 58. It is also possible to arrange outside the hole 180.

That is, the connecting rod 19 shown in FIG.
4, the outer peripheral surface near the lower end in the axial direction protruded outward from the coupling hole 180 of the coupling fitting 58,
A fitting groove 214 having a reverse tapered outer peripheral surface is formed over the entire circumference. And this fitting groove 2
In a state where the disc spring 202 is locked with respect to the disc 14, the disc spring 202 is externally attached to the connecting rod 194 and assembled. The disc spring 202 is formed of spring steel, and is gradually curved and extends upward in the axial direction toward the outer peripheral side. At the outer peripheral edge, the connecting hole 180 of the coupling fitting 58 is formed. The outer peripheral wall is supported by being superposed on the lower end face in the axial direction. Accordingly, when the connecting rod 194 is inserted into the connecting hole 180, the disc spring 2 is inserted into the connecting rod 194 and the connecting fitting 58.
02 exerts an urging force in the pull-out direction, and against this urging force, a locking force for locking the engaging groove 198 and the locking groove 196 via the snap ring 200 is applied. As a result, the connecting rod 194 is connected and held at a predetermined insertion position with respect to the connecting hole 180 of the connecting fitting 58 so as not to be relatively displaceable. In FIG. 7, in order to facilitate understanding, members and parts having the same structure as in the second embodiment are denoted by the same reference numerals as those in the second embodiment. Is attached.

In the above embodiment, the connecting rod 17
8 is formed on the side of the electromagnet type vibrating means, and the connecting fitting 58 having a connecting hole is formed on the exciting fitting side, but these connecting rods and connecting fittings (connecting holes) are opposite to each other. May be formed.

In addition, as the actuator employed in the present invention, in addition to the electromagnet type vibrating means using a coil and a permanent magnet as exemplified, for example, an electromagnet type vibrating means using no permanent magnet, a voice coil type Alternatively, an electromagnetic vibration means such as a diaphragm structure using air pressure, an electrostrictive actuator using a piezo element, or the like can be used.

In addition, although not enumerated one by one, the present invention
Based on the knowledge of those skilled in the art, various changes, modifications, improvements, and the like can be made, and unless such embodiments depart from the spirit of the present invention.
Both are included in the scope of the present invention,
Needless to say.

[0095]

As is apparent from the above description, in the fluid-filled active type vibration damping device having the structure according to the present invention, by inserting the connecting shaft into the connecting hole, the urging means is used. Based on the biasing force exerted in the pulling-out direction, the connecting shaft can be fixedly positioned and held at a position where the connecting shaft is prevented from being pulled out by the locking means in the connecting hole. It is possible to perform the operation promptly and reliably in the work space with good workability.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an automobile engine mount as a first embodiment of the present invention.

FIG. 2 is a plan view of a disc spring constituting the engine mount shown in FIG. 1;

FIG. 3 is a longitudinal sectional view showing an automobile engine mount as a second embodiment of the present invention.

FIG. 4 is an enlarged view showing a cross section taken along line IV-IV in FIG. 3;

FIG. 5 is a longitudinal sectional view showing an automobile engine mount as a third embodiment of the present invention.

FIG. 6 is an enlarged view showing a VI-VI section in FIG. 5;

FIG. 7 is an enlarged longitudinal sectional view showing a main part of an automobile engine mount as another specific example of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 engine mount 12 first mounting bracket 14 second mounting bracket 16 main body rubber elastic body 58 connecting fitting 72 pressure receiving chamber 92 vibrating fitting 98 electromagnet type vibrating device 104 inner magnetic pole 106 outer magnetic pole 154 permanent magnet 178 connecting rod 180 Connection hole 186 Rubber elastic body 188 Belleville spring

Claims (8)

[Claims] 1. A pressure receiving chamber in which a first mounting member and a second mounting member are connected by a main rubber elastic body to form a part of a wall portion by the main rubber elastic body and to which vibration is input. The pressure-receiving chamber is filled with an incompressible fluid, and another part of the wall of the pressure-receiving chamber is formed of a vibrating plate, and on the opposite side of the vibrating plate from the pressure-receiving chamber. An actuator for driving the vibrating plate to vibrate is provided, and the vibrating plate is vibrated by the actuator to control the pressure in the pressure receiving chamber. A connecting shaft protruding from one side of the vibration plate and the output member of the actuator toward the other side is provided, and the connection shaft is provided on the other side of the vibration plate and the output member of the actuator. While the connection hole to be inserted is provided, the connection shaft is inserted into the connection hole. Locking means for permitting insertion and preventing removal, and urging the connecting shaft in a direction of withdrawal from the connecting hole to fix the connecting shaft in the axial direction by the locking means. A fluid-filled active vibration isolator characterized by comprising a biasing means for holding. 2. A disk spring made of metal is used as said locking means, and an outer peripheral edge of said disk spring is fixedly supported on a peripheral wall of said connection hole, and said disk spring is placed on an inner peripheral side. The connecting shaft is bent so as to rise in the insertion direction of the connecting shaft as it goes, and the inner peripheral edge of the disc spring is locked to the outer peripheral surface of the connecting shaft, whereby the connecting shaft is inserted into the connecting hole. 2. The fluid-filled active vibration isolator according to claim 1, wherein a relative displacement in the inserting direction is allowed, but a relative displacement in the extracting direction of the connecting shaft from the connecting hole is prevented. 3. The locking position of the connecting shaft and the connecting hole in the pulling-out direction of the connecting shaft from the connecting hole is fixedly determined. 2. The fluid-filled active vibration isolator according to 1. 4. The urging means may apply an urging force larger than a driving force applied to the vibrating plate from the actuator during the pressure control of the pressure receiving chamber to the connecting shaft, and the connecting shaft may 4. The fluid-filled active vibration damping device according to claim 1, wherein a biasing force smaller than an external force applied to insert and assemble into the connecting hole can be applied to the connecting shaft. 5. The actuator is housed and arranged in the cup-shaped holding metal fitting by fixing the actuator through the holding metal fitting by fixing the opening peripheral edge of the holding metal fitting to the second mounting member. 5. The apparatus according to claim 1, wherein said second mounting member is fixedly supported.
The fluid-filled active vibration isolator according to any one of the above. 6. A cylindrical portion is provided on the second mounting member,
The first mounting member is spaced apart on one opening side of the cylindrical portion, and the main rubber elastic body elastically connects the first mounting member and the second mounting member. One of the openings is closed in a fluid-tight manner, and the other opening side of the tubular portion is closed in a fluid-tight manner with a flexible film which is easily deformed, while the main rubber elastic body and the flexible film are closed. By disposing the vibrating plate between the opposing surfaces and supporting it so that it can be displaced in the axial direction by the cylindrical portion, the pressure receiving chamber is formed on the rubber elastic body side of the main body with the vibrating plate interposed therebetween. Forming a variable-capacity equilibrium chamber filled with an incompressible fluid on the flexible membrane side, and further providing an orifice passage communicating the pressure receiving chamber and the equilibrium chamber with each other; A protrusion protruding through the flexible membrane in a fluid-tight manner; The actuator is disposed on the opposite side of the equilibrium chamber with the conductive film interposed therebetween, and the actuator is fixedly supported on the second mounting member. The fluid-filled active vibration isolator according to any one of claims 1 to 5, wherein the connecting shaft is provided on one of the connecting shafts, and the connecting hole is provided on the other. 7. An elastic rubber plate is adhered to the vibration plate, and the vibration plate is elastically supported by the elastic rubber plate so as to be displaceable with respect to the second mounting member. 7. The fluid encapsulation according to claim 6, wherein a projecting portion projecting through the flexible film in a fluid-tight manner is formed separately from the vibrating plate, and the flexible film is adhered to the projecting portion. Type active vibration isolator. 8. A stopper according to claim 1, further comprising a stopper member fixedly provided with respect to said second mounting member to limit displacement of said vibration plate toward said pressure receiving chamber. A fluid-filled active vibration isolator according to the above description.