JP4168445B2 - Anti-vibration actuator and active vibration isolator using the same - Google Patents

Description

  The present invention relates to an anti-vibration actuator used in an active anti-vibration device that can exhibit an active anti-vibration effect by being attached to a vibration-proof target member, and an active anti-vibration device using the same. In particular, the present invention relates to an anti-vibration actuator suitably used in an anti-vibration device such as an engine mount, body mount, and vibration damper of an automobile, and an active vibration isolator using the same.

  For example, in order to reduce vibration in a vibration-proof target member where vibration reduction is important, such as an automobile body, conventionally, vibration damping means using a damping effect such as a shock absorber or a rubber elastic body, A vibration isolator such as a vibration isolator utilizing a spring effect such as a coil spring or a rubber elastic body is employed, but since these anti-vibration devices all exhibit a passive anti-vibration action. For example, when characteristics such as the frequency of vibration to be damped change or when a higher level of vibration proofing is required, there is a problem that it is difficult to obtain a sufficient vibration proofing effect. Therefore, in recent years, an active vibration isolator has been developed and studied to reduce vibration to be vibrated positively or counterbalanced by applying an excitation force to the vibration isolation target member or vibration isolator. Has been. For example, those described in Patent Document 1 and Patent Document 2 are examples thereof.

  By the way, such an active vibration isolator requires an actuator that generates an excitation force, and such an actuator requires high controllability of frequency and phase with respect to the generated excitation force. Therefore, as an anti-vibration actuator used in an active type anti-vibration device, a coil is preferably used that controls the electromagnetic force and magnetic force generated by controlling the energization of the coil. Is done. Moreover, in order to drive the output member in a high frequency range of several tens of Hz or more, a guide mechanism in which a guide hole is formed in the housing and guides the output member in the driving direction is suitably employed.

  By the way, in such an anti-vibration actuator, the guide hole formed in the housing and guiding the output member penetrates the housing for reasons of the assembly process of the actuator and work reasons for various adjustments of the actuator. In many cases, it is formed with an open structure on the bottom surface of the housing.

  However, if the guide hole is left open at the bottom of the housing, foreign matter such as dust that has entered through the opening penetrates into the guide hole inside the housing, and the displacement of the output member is hindered. There has been a problem that the target drive force cannot be stably exhibited in the output member.

  In order to deal with such a problem, for example, as shown in Patent Document 3, a screw groove is formed in the opening portion of the guide hole in the housing, and a screw lid is screwed to the inner portion of the actuator. It is also conceivable that the closed area is blocked from the external space.

  However, in these active vibration isolators, the inside of the actuator may be in a high pressure state due to a high temperature environment such as in the engine room of the automobile. In this case, if the inside of the actuator is a sealed region, the air inside the actuator in the high-pressure state exhibits, for example, an action as an air spring for the vibration member, and suppresses excessive displacement of the vibration member. However, due to the high pressure state and the operation of the vibration member, the air inside the actuator is easily leaked to the outside. As a result, when the temperature of the engine room decreases due to engine stoppage or other conditions and the room temperature is normal, the inside of the actuator remains in a negative pressure state for a considerable period of time until air enters from the outside and becomes atmospheric pressure. turn into. As a result, the negative pressure acts as a suction force for the support rubber elastic body, and the support rubber elastic body is kept in a deformed state for a relatively long time, so that the spring characteristic of the support rubber elastic body changes. There is a risk that the durability may be reduced.

  In other words, in order to improve the durability of the actuator, it is desirable that the positive pressure state inside the actuator be maintained and that the negative pressure state be quickly eliminated, but in order to prevent dust from entering, If this is sealed, it becomes difficult to quickly eliminate the negative pressure.

JP-A-9-89040 JP-A-9-49541 JP 2001-1765 A

  Here, the present invention has been made in the background as described above, and the problem to be solved is to maintain the positive pressure state inside the actuator while preventing the intrusion of dust and the negative pressure. An object of the present invention is to provide an anti-vibration actuator having an improved structure capable of quickly eliminating the state and improving the durability of the actuator.

  The present invention also provides an active vibration isolation mount and an active vibration isolation damper as an active vibration isolation device having an improved structure configured using such an vibration isolation actuator. The purpose is to do.

  Hereinafter, embodiments of the present invention made to solve the above-described problems will be described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible. In addition, aspects or technical features of the present invention are not limited to those described below, but are based on the entire specification and drawings, or based on the inventive concept that can be grasped by those skilled in the art from these descriptions. It should be understood that

(Aspect 1 of the present invention relating to the vibration-proof actuator)
That is, the first aspect of the present invention relating to the vibration-proof actuator is that the coil member is incorporated in the interior of the substantially cup-shaped housing, and the armature to which the driving force is applied by energizing the coil member is arranged in the axial direction of the housing. while displaceably arranged, with allowed to elastically support the output member brought spaced output member on the opening side of the housing via a support rubber elastic body relative to the housing, said output member to said armature In the vibration-proof actuator, the housing is configured to apply an excitation force from the armature to the output member by energizing the coil member, thereby oscillating and displacing the output member in the axial direction of the housing. The coil in the housing is covered with the support rubber elastic body in a fluid-tight manner. The armature is disposed in a sealed area that is blocked from the external space, and a through hole is formed in the housing, and a one-way type valve means is provided in the through hole. In addition to suppressing the leakage of air from the sealed area to the external space, and allowing the inflow of air from the external space to the sealed area, an annular step portion is formed on the inner peripheral surface of the through hole. The lid plate metal fitting is sized to prevent the vibration-proof actuator from being displaced inward by the annular stepped portion, and the sealing rubber layer is formed on the inner surface of the lid plate metal fitting. Then, while pressing the seal rubber layer with the lid plate metal fitting and holding the annular stepped portion in a pressed state, the through hole is covered, while a communication hole is formed in the central part of the lid plate metal fitting, The seal gasket so as to block the communication hole. That constitutes the one-way valve means by by Desa extends a layer to form an opening and closing holes in the seal rubber layer, and wherein.

  In the vibration-proof actuator structured according to this aspect, by making the inside of the housing a sealed region, it is possible to prevent intrusion of dust and the like from the outside of the housing and maintain a positive pressure state inside the actuator. Thus, the internal air can be effectively acted as an air spring, and excessive deformation of the support rubber elastic body when the actuator is operated can be suppressed. In addition, by providing a one-way type valve means in the housing and allowing the inflow of air into the housing, it becomes possible to quickly eliminate the negative pressure state inside the housing, and support rubber elasticity The effect of negative pressure suction on the body can also be reduced. That is, the effect of maintaining positive pressure and quickly eliminating negative pressure while preventing intrusion of dust into the housing by allowing the inside of the housing, which is a sealed region, to communicate with the external space by a one-way type valve means Thus, the durability of the actuator can be improved.

  It should be noted that there are no particular limitations on the location, number and specific shape of the through holes in which the one-way type valve means is provided, and the specific mode of the one-way type valve means. For example, it is possible to form a plurality of through-holes and valve bodies, and the one-way type valve means is constituted by using a check valve or shuttle valve such as a ball type or a poppet type, or an air vent such as a bellows type. It is also possible to configure using a pressure regulating valve such as a valve or a diaphragm type, or it is possible to configure a one-way type valve means by controlling opening and closing of a solenoid valve according to a temperature difference. .

Further, in the vibration isolating actuator having the structure according to the present embodiment, a one-way type valve means can be realized very easily without requiring any special member, mechanism or device.

(Aspect 2 of the present invention relating to the vibration-proof actuator)
The second aspect of the present invention relating to the vibration isolating actuator is that a coil member is incorporated in a substantially cup-shaped housing, and an armature to which a driving force is applied by energizing the coil member can be displaced in the axial direction of the housing. The output member is spaced apart on the opening side of the housing to elastically support the output member with respect to the housing via a support rubber elastic body, and the output member is connected to the armature. Accordingly, in the vibration-proof actuator, the opening of the housing is configured to apply an excitation force from the armature to the output member by energizing the coil member, thereby oscillating and displacing the output member in the axial direction of the housing. By covering the portion fluid-tightly with the support rubber elastic body, the coil in the housing and the coil -While the area where the matcher is disposed is a sealed area that is blocked from the external space, the housing is formed with a through hole, and a one-way type valve means is provided in the through hole, whereby the through hole In addition to suppressing leakage of air from the sealed area to the external space and allowing inflow of air from the external space to the sealed area, the housing further includes a guide hole extending on the central axis, and and allowed inserting a guide rod provided on the output member in the guide hole, while so allowed to vibration displacement of the output member in the direction of the central axis of the housing on the basis of the guiding action of the guide hole of the guide rod, the The through hole is provided on an extension line of the guide hole in the housing, and the guide hole is opened to the outside through the through hole.

  In the vibration-proof actuator having the structure according to this aspect, the through hole for providing the one-way type valve means is actively used by communicating the guide hole inside the housing with the external space through the through hole. Thus, for example, the through hole can be used for operations such as output adjustment and assembly of the actuator. By providing the one-way type valve means in the through hole, it is possible to cover the opening of the guide hole and prevent dust from entering the guide hole.

(Embodiment 3 of the present invention relates to anti-vibration actuator)
According to a third aspect of the present invention relating to the vibration-proof actuator , a coil member is incorporated in a substantially cup-shaped housing, and an armature to which a driving force is applied by energizing the coil member can be displaced in the axial direction of the housing. The output member is spaced apart on the opening side of the housing to elastically support the output member with respect to the housing via a support rubber elastic body, and the output member is connected to the armature. Accordingly, in the vibration-proof actuator, the opening of the housing is configured to apply an excitation force from the armature to the output member by energizing the coil member, thereby oscillating and displacing the output member in the axial direction of the housing. By covering the portion fluid-tightly with the support rubber elastic body, the coil in the housing and the coil -While the area where the matcher is disposed is a sealed area that is blocked from the external space, the housing is formed with a through hole, and a one-way type valve means is provided in the through hole, whereby the through hole In addition to suppressing leakage of air from the sealed area to the outside space, and allowing air to flow from the outside space to the sealed area, the air hole is further substantially in the shape of a dome toward the inside of the housing. And forming a sealing rubber that blocks the through-hole, penetrating the protruding tip of the sealing rubber in the thickness direction, and forming a valve hole that is closed by the elasticity of the sealing rubber. Thus, the one-way type valve means is constructed.

  In the vibration-proof actuator having the structure according to the present embodiment, the one-way type valve means that can operate quickly in response to the pressure change inside the actuator can be realized with a simple structure. That is, when the inside of the housing is in a positive pressure state, a compressive stress is generated in the protruding portion and the valve hole is closed. On the other hand, when the inside of the housing is in a negative pressure state, a tensile stress is applied to the protruding portion. As a result, the valve hole is opened. In particular, since the protrusion is formed in a substantially dome shape inside the housing, it is possible to effectively generate a compressive or tensile stress in the protrusion due to a change in pressure inside the housing, so that a pressure difference between the inside and the outside can be realized. The valve action based on can be advantageously exerted.

In addition, this aspect is an aspect combined with the above-described aspect 1, and is particularly preferably employed. That is, the sealing rubber layer in the embodiment 1, to form a sealing rubber in the present embodiment projecting toward the inside through hole side, by a valve hole in this embodiment and the opening and closing holes of the seal rubber layer in the embodiment 1, The intended one-way valve means is advantageously constructed.

(Aspect 4 of the present invention relating to the vibration-proof actuator)
According to a fourth aspect of the present invention relating to the vibration isolating actuator, in the vibration isolating actuator according to aspect 3 , the valve hole has a substantially needle hole shape substantially at the top of the sealing rubber, and the thickness of the sealing rubber. It is characterized by being penetrated in the direction. The vibration-proof actuator having the structure according to the present embodiment can be easily formed by inserting a pin or the like after molding the sealing rubber, for example.

(Aspect 5 of the present invention relating to the vibration-proof actuator)
A fifth aspect of the present invention relates to anti-vibration actuator, in the anti-vibration actuator according to the embodiment 3, the valve hole is the thickness of the sealing rubber with a slit shape extending in the axis-perpendicular direction of the sealing rubber It is characterized by being penetrated in the direction. In the vibration-proof actuator structured according to this aspect, the effective opening amount of the valve hole can be increased, thereby ensuring a larger flow rate of the air flowing through the valve hole, and more rapid negative pressure. Can be eliminated.

(Aspect 6 of the present invention relating to the vibration-proof actuator)
The sixth aspect of the present invention relating to the vibration isolating actuator is the vibration isolating actuator according to aspect 3 , wherein the valve hole extends from the sealing region side to a predetermined length in the thickness direction of the sealing rubber. In this case, it has a reverse taper shape that gradually increases in diameter toward the sealed region side. In the anti-vibration actuator having the structure according to this aspect, since the valve hole is opened in an expanded shape toward the sealed region side, the inflow of air from the external space to the sealed region is made easier. Yes. In addition, since the diameter of the sealed region is large due to the expanded shape, the valve hole is opened against the tensile force exerted on the protruding portion of the sealing rubber when the inside of the actuator is in a negative pressure state. It is easy to be deformed, and the inflow of air at the time of negative pressure is made easier.

(The present invention relating to an active vibration-proof mount)
The present invention relating to an active vibration-proof mount includes a first attachment member attached to one member constituting a vibration transmission system by being connected to each other, and a second attachment member attached to the other member as a main rubber. While being connected by an elastic body, a part of the wall portion is formed by the main rubber elastic body to form a pressure receiving chamber in which an incompressible fluid is enclosed, and another part of the wall portion of the pressure receiving chamber is added. An active member configured by a vibration member, provided with an actuator that exerts a vibration force on the vibration member, and actively controlling the pressure of the pressure receiving chamber by driving the vibration member with the actuator. in the mold-proof mutabilis mount, as the actuator, inside the housing of a substantially cup-shaped with incorporated coil member, said housing armature driving force is exerted by the energization of the said coil member The output member is disposed so as to be displaceable in the axial direction, and the output member is spaced apart on the opening side of the housing to elastically support the output member with respect to the housing via a support rubber elastic body. An anti-vibration actuator that is connected to the armature to apply an excitation force from the armature to the output member by energizing the coil member, thereby oscillating and displacing the output member in the axial direction of the housing. The housing and the armature are covered with the support rubber elastic body in a fluid-tight manner so that the coil and the armature are disposed in a sealed area that is blocked from the external space, By forming a through hole in the housing and providing a one-way type valve means in the through hole, air from the sealed region through the through hole is formed. It suppresses the leakage into parts space, using the anti-vibration actuator which is adapted to permit the inflow of air from the external space into the sealed area, secure the housing in the actuator for vibration-proof to the second mounting member while, that constitutes the vibrating member by said output member, and wherein. According to the present invention as described above, an active vibration-proof mount that can be suitably employed for, for example, an automobile engine mount can be advantageously realized.

  As is clear from the above description, in the vibration isolating actuator having the structure according to the present invention, the inside of the housing is a substantially hermetically sealed region, so that dust is prevented from entering and the air inside the housing is supported. By acting like an air spring against the rubber elastic body, excessive displacement of the support rubber elastic body can be suppressed. In addition, since the one-way type valve means is provided in the housing, when the inside of the housing is in a positive pressure state, the air inside is more effectively used as an air spring, and in the negative pressure state. Such a negative pressure state can be quickly eliminated, thereby reducing the suction force exerted on the supporting rubber elastic body and improving the durability of the vibration-proof actuator. .

  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.

  First, FIG. 1 shows an automobile engine mount 10 as a first embodiment of the present invention relating to an active vibration-proof mount. The engine mount 10 has a structure in which a first mounting bracket 12 as a first mounting member and a second mounting bracket 14 as a second mounting member are elastically connected by a main rubber elastic body 16. The first mounting bracket 12 is attached to a power unit of an automobile (not shown), while the second mounting bracket 14 is attached to a body of an automobile (not shown), thereby supporting the power unit against vibration against the body. ing. Also, under such a mounted state, between the first mounting bracket 12 and the second mounting bracket 14, the shared load of the power unit and the main vibration to be damped are both substantially shafts of the engine mount 10. It is input in the direction (vertical direction in FIG. 1). In the following description, in principle, the vertical direction refers to the vertical direction in FIG.

  More specifically, the first mounting bracket 12 is constituted by a main rubber inner fitting 18 and a diaphragm inner fitting 20, and the second mounting fitting 14 is constituted by a main rubber outer barrel fitting 22 and a diaphragm outer barrel fitting 24. Has been. The main rubber inner metal fitting 18 and the main rubber outer cylinder fitting 22 are vulcanized and bonded to the main rubber elastic body 16 to form a first integral vulcanized molded product 28, while the diaphragm inner metal fitting 20 and the diaphragm outer cylinder fitting are made. 24 is vulcanized and bonded to a diaphragm 30 as a flexible film to form a second integral vulcanized molded product 32. The first and second integral vulcanized molded products 28 and 32 are mutually connected. Are combined.

  Here, the main rubber inner metal fitting 18 constituting the first integrally vulcanized molded product 28 has a substantially truncated cone shape in the reverse direction. Further, a fitting recess 34 is formed on the upper end surface (large-diameter side end surface) of the main rubber inner metal member 18, and a screw hole 38 is formed in the bottom surface of the fitting recess 34.

  Furthermore, the main rubber outer tubular fitting 22 includes a tubular wall portion 40 having a substantially large-diameter cylindrical shape, and a flange-shaped portion 42 that extends radially outward at the lower end in the axial direction of the tubular wall portion 40. Are integrally formed, and the upper end portion in the axial direction of the cylindrical wall portion 40 is a tapered cylindrical portion 44 that gradually expands as it goes upward in the axial direction. Thus, a circumferential groove 45 is formed on the outer peripheral side of the main rubber outer tube fitting 22 so as to open to the outer peripheral surface and extend in the circumferential direction with a length of a little less than one round. Further, the main rubber inner metal fitting 18 is spaced apart on the substantially same central axis so as to be spaced above the main rubber outer cylinder fitting 22, and the reverse outer tapered outer surface of the main rubber inner metal fitting 18 and the taper in the main rubber outer cylinder fitting 22. The inner peripheral surface of the cylindrical portion 44 is spaced from and opposed to each other, and the opposing surfaces of the main rubber inner metal fitting 18 and the main rubber outer cylinder metal fitting 22 are elastically connected by the main rubber elastic body 16. ing.

  The main rubber elastic body 16 has a large-diameter frustum shape as a whole, and a main rubber inner metal fitting 18 is coaxially arranged and vulcanized and bonded to the central portion thereof. The tapered tubular portion 44 of the main rubber outer tubular fitting 22 is overlapped and vulcanized and bonded to the outer peripheral surface of the side end portion. As a result, the main rubber elastic body 16 is formed as a first integral vulcanized molded article 28 including the main rubber inner metal fitting 18 and the main rubber outer cylinder fitting 22 as described above.

  On the other hand, the diaphragm inner metal fitting 20 constituting the second integrally vulcanized molded product 32 has a thick disk shape. In addition, a fitting convex portion 46 is formed on the lower surface of the diaphragm inner metal member 20, and an insertion hole 52 is formed so as to penetrate a portion where the fitting convex portion 46 is formed. Further, the diaphragm inner metal fitting 20 projects upward and is integrally formed with a mounting plate portion 58, and a bolt insertion hole 59 is provided in the central portion of the mounting plate portion 58.

  Further, the diaphragm outer tube fitting 24 has a thin-walled large-diameter cylindrical shape, and a mounting plate portion 62 that extends outward in the radial direction is integrally formed in the axially upper opening. . A plurality of insertion holes are formed in the mounting plate portion 62, and fixing bolts 64 are press-fitted into the insertion holes, respectively. Furthermore, an annular plate-shaped flange-shaped portion 66 that extends outward in the radial direction is integrally formed in the opening portion on the lower side in the axial direction of the diaphragm outer tube fitting 24. An annular caulking piece 68 that projects downward in the axial direction is integrally formed on the outer peripheral edge.

  A diaphragm inner fitting 20 is disposed on substantially the same central axis so as to be spaced apart upward in the axial direction of the diaphragm outer tubular fitting 24, and the diaphragm inner fitting 20 and the diaphragm outer tubular fitting 24 are separated by the diaphragm 30. It is connected.

  The diaphragm 30 is formed of a thin rubber film and has a substantially annular shape extending in the circumferential direction with a curved cross-sectional shape having a large slack so that elastic deformation can be easily allowed. The inner peripheral edge of the diaphragm 30 is vulcanized and bonded to the outer peripheral edge of the diaphragm inner metal fitting 20, and the outer peripheral edge of the diaphragm 30 is in the axially upper opening of the diaphragm outer cylindrical metal fitting 24. It is vulcanized and bonded. Thus, the diaphragm 30 is formed as a second integral vulcanized molded product 32 including the diaphragm inner fitting 20 and the diaphragm outer tube fitting 24.

  Thus, the second integral vulcanized molded product 32 is assembled on the first integral vulcanized molded product 28 from above, and the diaphragm inner metal fitting 20 is attached to the main rubber inner metal fitting 18. The diaphragm outer tube fitting 24 is fixed to the main rubber outer tube fitting 22, and the diaphragm 30 is spaced apart from the main rubber elastic body 16, so that the outer peripheral surface of the main rubber elastic body 16 is fixed. Is disposed so as to cover the entire surface.

  That is, the diaphragm inner metal fitting 20 is directly overlaid on the upper surface of the main rubber inner metal fitting 18, and the fitting convex portion 46 of the diaphragm inner metal fitting 20 is fitted into the fitting concave portion 34 of the main rubber inner metal fitting 18. And the main rubber inner metal fitting 18 are aligned on the same central axis. Particularly in the present embodiment, the diaphragm inner metal fitting is obtained by the engaging action of the engaging outer peripheral surface 50 and the engaging inner peripheral surface 36 formed in a notch shape on each outer peripheral surface of the fitting convex portion 46 and the fitting concave portion 34. 20 and the main rubber inner fitting 18 are positioned relative to each other in the circumferential direction, and the insertion hole 52 of the diaphragm inner fitting 20 and the screw hole 38 of the main rubber inner fitting 18 are aligned.

  As shown in FIG. 1, in a state where the main rubber inner metal fitting 18 and the diaphragm inner metal fitting 20 are overlapped, the connecting bolt 70 is threaded through the insertion hole 52 of the diaphragm inner metal fitting 20. 38 is screwed. Thus, the main mounting bracket 12 is configured by connecting and fixing the main rubber inner metal fitting 18 and the diaphragm inner metal fitting 20 with the connecting bolt 70.

  On the other hand, the diaphragm outer tubular fitting 24 is externally inserted from the upper side in the axial direction with respect to the main rubber outer tubular fitting 22. Further, the outer peripheral edge of the flange-like portion 42 is overlapped in the axial direction with respect to the flange-like portion 66 of the diaphragm outer tubular fitting 24 at the lower end of the main body rubber outer tubular fitting 22, and at the upper end thereof, The opening edge of the tapered tubular portion 44 is overlapped with the inner peripheral surface of the diaphragm outer tubular fitting 24 in the radial direction.

  Then, the caulking piece 68 of the diaphragm outer cylinder fitting 24 is caulked and fixed to the outer peripheral edge of the flange-like portion 42 of the main rubber outer cylinder fitting 22, whereby the main rubber outer cylinder fitting 22 and the diaphragm outer cylinder fitting 24 are mutually connected. It is fixed and assembled. In addition, seal rubber integrally formed with the main rubber elastic body 16 or the diaphragm 30 is interposed in the overlapping portion of the main body rubber outer cylindrical metal fitting 22 with the diaphragm outer cylindrical metal fitting 24 at both upper and lower end portions, respectively. Is sealed. As a result, the circumferential groove 45 formed in the main rubber outer cylinder fitting 22 is fluid-tightly covered with the diaphragm outer cylinder fitting 24, and the diameter of the cylindrical wall portion 40 of the main rubber outer cylinder fitting 22 and the diaphragm outer cylinder fitting 24 is thereby increased. An annular passage 72 is formed that extends continuously between the direction-opposing surfaces in the circumferential direction with a predetermined length or over the entire circumference.

  Further, a partition plate fitting 74 and a lid member 76 are assembled in the lower opening of the main rubber outer cylinder fitting 22. The lid member 76 has a vibrating plate 80 as an output member vulcanized and bonded to the center portion of the elastic rubber body 78 having a substantially annular plate shape, and an annular holding fitting 82 is provided on the outer peripheral portion thereof. The vibration plate 80 and the annular holding metal fitting 82 are elastically connected by a support rubber elastic body 78.

  The vibration plate 80 has a disk shape, and an annular connecting portion 84 that protrudes upward is integrally formed on the outer peripheral edge portion thereof. In addition, a drive shaft 86 extending downward is integrally formed at the central portion of the vibration plate 80, and a tip portion of the drive shaft 86 is a male screw. The vibration plate 80 includes an annular connecting portion 84 and a drive shaft 86, and is integrally formed of a hard material such as metal or synthetic resin.

  On the other hand, the annular holding fitting 82 is integrally formed with a mounting plate portion 90 and a positioning projection 92 that spread in a flange shape with respect to the upper and lower openings of the cylindrical portion 88 having a cylindrical shape. An annular press-fit portion 94 that protrudes further downward is integrally formed at the peripheral portion.

  A vibration plate 80 is disposed on substantially the same central axis so as to be separated inward in the radial direction of the annular holding metal fitting 82, and spreads between radially opposed surfaces of the annular holding metal piece 82 and the vibration plate 80. Thus, the support rubber elastic body 78 is disposed. The supporting rubber elastic body 78 is vulcanized and bonded to the opposing surfaces of the annular connecting portion 84 of the vibration plate 80 and the cylindrical portion 88 of the annular holding bracket 82 at the inner and outer peripheral edges thereof. A space between the plate 80 and the annular holding fitting 82 is fluid-tightly closed by a support rubber elastic body 78. A stopper rubber 98 is formed in the vicinity of the annular connecting portion 84 of the vibration plate 80 so as to cover the annular connecting portion 84, and the amount of movement of the vibration plate 80 in the approaching direction to the partition plate fitting 74 is small. In addition to being limited in terms of shock, impact and hitting sound at the time of contact are reduced.

  On the other hand, the partition plate metal 74 has a thin disk shape, and has an outer diameter dimension that reaches a middle portion in the radial direction of the mounting plate portion 90 in the annular holding metal 82. Further, the central portion of the partition plate fitting 74 is projected upward in a substantially plateau shape, and an orifice through hole 96 is provided through the central axis thereof. Further, a plurality of locking pieces 79 project upward from the circumference located near the outer peripheral edge of the partition plate metal member 74.

  The partition plate fitting 74 is aligned in the direction perpendicular to the axis by the locking piece 79, and is attached to the flange-like portion 42 of the main rubber outer tube fitting 22 assembled thereto at the lower opening of the diaphragm outer tube fitting 24. On the other hand, the outer peripheral edge is overlapped and assembled. Further, a lid member 76 is assembled to the lower opening of the diaphragm outer tube fitting 24 from below the partition plate fitting 74, and the mounting plate portion 90 of the annular holding fitting 82 in the lid member 76 is a main rubber outer tube fitting. 22 and the partition plate fitting 74 are overlapped, and the respective outer peripheral edge portions thereof are caulked and fixed by caulking pieces 68 of the diaphragm outer tube fitting 24.

  As a result, the lower opening of the diaphragm outer tube fitting 24 is covered with the lid member 76 in a fluid-tight manner, so that an incompressible fluid is interposed between the opposing surfaces of the main rubber elastic body 16 and the lid member 76. An enclosed pressure receiving chamber 100 is formed. In this pressure receiving chamber 100, a part of the wall portion is constituted by the main rubber elastic body 16, and the elasticity of the main rubber elastic body 16 is input when vibration is input between the first mounting bracket 12 and the second mounting bracket 14. Based on the deformation, a vibration is input to cause a pressure fluctuation.

  Further, a partition plate fitting 74 is disposed in the pressure receiving chamber 100, and the pressure receiving chamber 100 sandwiches the partition plate fitting 74 and the vibration input chamber 102 on the main rubber elastic body 16 side and the lid member 76 side. The vibration input chamber 102 and the vibration chamber 104 are communicated with each other through an orifice through hole 96.

  Furthermore, the main rubber elastic body 16 and the diaphragm 30 are fixed to the first mounting bracket 12 and the second mounting bracket 14 at the inner peripheral edge and the outer peripheral edge, respectively, so that the main rubber elastic body 16 and the diaphragm are fixed. Between the 30 opposing surfaces, an equilibrium chamber 106 filled with an incompressible fluid is formed. That is, the balance chamber 106 is configured by a diaphragm 30 whose part of the wall portion is easily deformable, and the volume change is easily allowed based on the elastic deformation of the diaphragm 30. The incompressible fluid sealed in the pressure receiving chamber 100 and the equilibrium chamber 106 is a vibration required for the automobile engine mount 10 to have a vibration isolation effect based on a resonance action of a fluid that flows through an orifice passage 112 described later. In order to obtain efficiently in the frequency range, generally 0.1 Pa. A low-viscosity fluid of s or less is preferably employed.

  Further, the pressure receiving chamber 100 and the equilibrium chamber 106 formed on the upper side include an annular passage 72 formed in the second mounting bracket 14 and a communication hole 110 formed at one end in the circumferential direction, and a circumferential direction. The other end portion is connected through a communication hole 107 formed in the main rubber elastic body 16, thereby allowing the pressure receiving chamber 100 and the equilibrium chamber 106 to communicate with each other to allow fluid flow between the chambers 100 and 106. The orifice passage 112 is formed with a predetermined length. Note that the orifice passage 112 has a vibration isolation effect based on a resonance action of a fluid that is caused to flow inside based on a pressure difference induced between the pressure receiving chamber 100 and the equilibrium chamber 106 when vibration is input. The passage cross-sectional area and the passage length are appropriately set and tuned so as to be effectively exhibited in the frequency range.

  On the other hand, on the side opposite to the pressure receiving chamber 100 with the lid member 76 therebetween, an electromagnetic exciter 114 as a vibration-proof actuator is disposed. The electromagnetic exciter 114 has a coil 118 fixedly assembled in an accommodated state in an internal region 170 formed by covering the upper surface of a substantially cup-shaped housing 116 with a lid member 76. Around the coil 118, yokes 120 and 122 made of an annular ferromagnetic material are fixedly assembled to form a magnetic path. Further, the yoke 120 forming the magnetic path is formed with a cylindrical inner peripheral surface 138 as a guide hole penetrating the center, and the guide sleeve 124 is elastically positioned on the cylindrical inner peripheral surface 138. Is installed. A slider 126 made of a ferromagnetic material as an armature is assembled so as to be slidable in the guide sleeve 124.

  The slider 126 is disposed in a magnetic gap region formed between the yokes 120 and 122 that form a magnetic path, and a magnetic force is applied by energizing the coil 118 while being guided by the guide sleeve 124. It is driven in the axial direction. The slider 126 has a substantially cylindrical shape as a whole, and is slidable on the guide sleeve 124 on the outer peripheral surface. On the inner peripheral surface, an annular engagement protrusion 128 is formed on the inner side. It protrudes toward the surface.

  The electromagnetic exciter 114 is caulked together with the annular holding bracket 82 and the like, with the flange portion 130 formed on the peripheral edge of the opening of the housing 116 superimposed on the mounting plate 90 of the annular holding bracket 82 in the lid member 76. The piece 68 is caulked and fixed to the second mounting bracket 14. Thereby, the electromagnetic exciter 114 is assembled so that the sliding central axis of the slider 126 substantially coincides with the central axes of the first and second mounting brackets 12 and 14.

  In addition, a drive shaft 86 of the vibration plate 80 is inserted into the electromagnetic exciter 114 assembled in this way from above on the center axis thereof, and the drive shaft 86 is engaged with the engagement protrusion of the slider 126. The part 128 is inserted. Further, a coil spring 132 is extrapolated to the drive shaft 86 and is disposed across the opposing surfaces of the vibration projection plate 80 and the engaging projection 128 of the slider 126. A positioning nut 134 is screwed to the tip portion inserted through the engaging protrusion 128. Then, the positioning nut 134 is screwed into the drive shaft 86, and the coil spring 132 is compressed with the vibration plate 80 via the engagement protrusion 128 of the slider 126, so that the slider is moved with respect to the drive shaft 86. 126 is fixedly positioned in the axial direction. In this embodiment, the collar member 150 is crowned on both ends of the coil spring 132 to reduce wear due to friction between the coil spring 132 and other members. Thus, the drive shaft 86 and the slider 126 are connected in a substantially fixed state in the axial direction by the urging force of the coil spring 132, and the driving force applied to the slider 126 by energizing the coil 118 is driven. The shaft 86 is extended. Further, as is clear from this, in this embodiment, the guide rod is configured to include the slider 126 and the drive shaft 86.

  In short, by adjusting the screwing amount of the positioning nut 134 into the drive shaft 86, the slider with respect to the vibration plate 80 elastically positioned and supported by the support rubber elastic body 78 with respect to the second mounting bracket 14. The attachment position of 126 can be changed and set in the axial direction, thereby making it possible to finely adjust the distance between the opposing surfaces of the slider 126 with respect to the yoke 122 against the magnetic force action. In this embodiment, the lock bolt 136 is tightened from the lower side in the axial direction with respect to the positioning nut 134, and the lock bolt 136 is in contact with the tip of the drive shaft 86 in the screw hole of the positioning nut 134. As a result, the tightening position of the positioning nut 134 relative to the drive shaft 86 is locked.

  Note that a slight gap is formed between the outer peripheral edge of the positioning nut 134 and the facing surface of the slider 126, and the slider 126 is allowed to slide in a direction perpendicular to the axis with respect to the drive shaft 86. Thus, the positioning nut 134 is overlaid and held in contact. Thus, relative displacement between the drive shaft 86 and the slider 126 due to dimensional error in manufacturing of each member, positioning error at the time of assembly, and the like can be advantageously absorbed, and the slider 126 is coiled. It is possible to stably position the shaft 118 in the direction perpendicular to the axis. Further, the temporary axis deviation during the operation of the actuator is also advantageously absorbed, so that stable operation characteristics can be obtained. In addition, as an allowable amount of the relative displacement in the direction perpendicular to the axis, a range of 0.2 mm to 3 mm is preferably employed.

  A through hole 140 is provided in the center of the bottom wall portion of the housing 116 of the electromagnetic exciter 114, and a yoke 122 that is positioned opposite to the slider 126 and exerts a magnetic force is exposed to the outside. Through the center hole 142 of the yoke 122, the internal space of the electromagnetic vibrator 114 in which the slider 126 is disposed can be directly opened to the outside. Then, by inserting a tool such as a hexagon wrench into the opening of the center hole 142 of the yoke 122 through this opening, the lock bolt 136 and the positioning nut 134 are operated to adjust the position of the slider 126 from the outside. You can do that.

  Further, as shown in FIG. 2, the central hole 142 of the yoke 122 is enlarged in diameter near the lower opening to form a large diameter portion 143. An opening portion of the guide hole is formed by the large diameter portion 143, and the cylindrical inner peripheral surface 138 of the yoke 120 as the guide hole is opened at the bottom surface of the housing 116. As is clear from this, in the present embodiment, the large-diameter portion 143 is a through hole formed in the housing 116. And the level | step difference surface 144 as an annular level | step-difference part located in the axial direction inner side of the large diameter part 143 is formed. Further, an annular locking groove 145 extending continuously in the circumferential direction is formed on the inner peripheral surface of the large diameter portion 143. The large diameter portion 143 is assembled with a check valve member 146 as a one-way type valve means.

  The check valve member 146 includes a cover plate metal 148 and a seal rubber layer 149. As shown in FIGS. 3 and 4, the lid plate metal 148 has a disk shape, and a communication hole 164 is formed through the central portion thereof in the thickness direction. A seal rubber layer 149 is formed on one surface of the cover plate metal member 148 over substantially the entire surface and is vulcanized and bonded. The center portion of the seal rubber layer 149 is a protrusion 166 that protrudes in a substantially dome shape, and is formed substantially coaxially with the communication hole 164 of the lid plate metal member 148. The seal rubber layer 149 is an annular seal rubber portion 154 whose outer peripheral portion is slightly thicker than the center portion. In the present embodiment, the seal rubber layer 149 covers the communication hole 164 of the lid plate metal member 148 in a fluid-tight manner from the inside. The protrusion 166 is formed with a valve hole 168 penetrating in the thickness direction on the central axis thereof. As is clear from this, in this embodiment, the seal rubber layer 149 is made of sealing rubber and The valve hole 168 serves as an opening / closing hole for the seal rubber layer 149. As shown in FIG. 5, the valve hole 168 is closed in a substantially sealed state and penetrates in the thickness direction of the protruding portion 166, for example, with respect to the central portion of the seal rubber layer 149 after vulcanization molding. It can be formed by piercing a needle-like sharp jig. In addition, the valve hole 168 shown in the drawing shows a shape when the projecting portion 166 is opened due to the generation of tensile stress, and extends linearly with a circular section having a substantially constant size. . The valve hole 168 is maintained in a closed state by the elasticity of the seal rubber layer 149 in an atmospheric pressure atmosphere.

  The lid plate metal 148 is fitted into the large-diameter portion 143 of the yoke 122, and the C-shaped retaining ring 155 is fitted into the large-diameter portion 143 from the outside of the lid plate metal 148 so as to be locked in the locking groove 145. Has been. As a result, the outer surface of the cover plate bracket 148 is pressed toward the inside of the center hole 142 by the C-shaped retaining ring 155, and the outer peripheral portion of the cover plate bracket 148 moves the annular seal rubber portion 154 against the stepped surface 144. Therefore, the center hole 142 formed in the yoke 122 of the electromagnetic exciter 114 is covered fluid-tightly at the large diameter portion 143 formed in the opening. Further, when the lid plate metal 148 is fitted into the large-diameter portion 143, the projecting portion 166 projecting from the central portion of the seal rubber layer 149 is projected toward the inside of the housing 116.

  In the engine mount 10 having the above-described structure, a cylindrical bracket 156 is further inserted with respect to the electromagnetic exciter 114. The cylindrical bracket 156 has a flange-shaped portion 158 at the upper end opening, and the flange-shaped portion 158 includes the flange-shaped portion 42 of the main rubber outer tubular fitting 22, the mounting plate 90 of the annular holding fitting 82, and the housing 116. The flange portion 130 and the diaphragm outer tube fitting 24 are caulked and fixed by caulking pieces 68. A mounting plate portion 160 is formed at the lower end opening of the cylindrical bracket 156, and a plurality of mounting holes (not shown) are formed in the mounting plate portion 160.

  Thus, although the engine mount 10 is not shown, the mounting plate portion 58 of the first mounting bracket 12 is mounted on the power unit with a fixing bolt inserted through the bolt insertion hole 59, while the second mounting bracket 14 is attached between the power unit and the body by being attached to the vehicle body with a fixing bolt via the cylindrical bracket 156. When vibration is input between the first mounting bracket 12 and the second mounting bracket 14 under such a mounting state, the elastic body 16 elastically deforms between the pressure receiving chamber 100 and the equilibrium chamber 106. A fluid flow is generated through the orifice passage 112 based on the pressure difference caused by the fluid, and a passive vibration-proofing effect is exhibited based on a fluid action such as a resonance action of the fluid. Further, by controlling the energization to the coil 118 at a frequency or phase according to the vibration to be damped and driving the oscillating plate 80 by the electromagnetic oscillating device 114, the orifice through hole 96 from the oscillating chamber 104 is driven. By applying pressure fluctuation to the vibration input chamber 102 through and actively controlling the pressure fluctuation of the vibration input chamber 102, an active vibration isolating effect against the input vibration can be obtained.

  Therefore, in the engine mount 10 according to the present embodiment, the inner region 170 of the housing 116 is configured such that the opening of the housing 116 is covered with the lid member 76 and the large-diameter portion 143 that is the lower opening is the sealing rubber layer 149. As a result of the sealing, the sealed area is cut off from the external space, and intrusion of dust and the like is suppressed.

  Further, when the engine mount 10 is exposed to a high temperature environment due to a temperature rise in the engine room or the like, the air in the internal region 170 is heated and the internal region 170 becomes a high pressure state. At this time, in the engine mount 10 according to the present embodiment, a compressive stress is generated in the direction along the surface with respect to the entire protruding portion 166 protruding inward of the inner region 170. The valve hole 168 is maintained in the closed state. Thereby, leakage of air in the internal region 170 is suppressed, and the positive pressure state of the internal region 170 is maintained. The air in the positive pressure state functions as an air spring for the support rubber elastic body 78 and can suppress excessive displacement of the support rubber elastic body 78.

  On the other hand, when the temperature of the engine mount 10 decreases due to engine stop or the like, the internal region 170 is temporarily in a negative pressure state. In such a negative pressure state, tensile stress is generated in the direction along the surface with respect to the entire protrusion 166, so that the valve hole 168 of the protrusion 166 is opened. As a result, inflow of air into the internal region 170 through the valve hole 168 is permitted, and the negative pressure state in the internal region 170 is quickly eliminated, and an unnecessary negative pressure exerted on the support rubber elastic body 78. The suction power is also reduced.

  Thus, by providing the check valve member 146 as a one-way type valve means at the lower end opening of the housing 116, the positive pressure state of the inner region 170 is maintained and the support rubber elastic body 78 is excessively displaced. On the other hand, the negative pressure state is quickly eliminated, and the negative pressure suction force exerted on the support rubber elastic body 78 is reduced. Thus, the settling of the support rubber elastic body 78 is reduced, and the durability of the vibration-proof actuator is improved.

  Furthermore, in this embodiment, by providing the valve hole 168 in the seal rubber layer 149 for sealing the opening of the housing 116, it is very easy to perform one-way operation without preparing any special member. The valve means of the mold is realized.

  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 in this Embodiment.

  For example, the specific shape of the valve hole 168 formed in the seal rubber layer 149 is not limited at all, and the seal rubber as in the check valve member 172 as the second embodiment shown in FIGS. A valve hole 174 that extends with a predetermined width in the radial direction of the layer 149 may be formed. According to such a valve hole 174, a larger amount of air flowing through the valve hole 174 can be secured, and the negative pressure in the internal region 170 can be eliminated more quickly. The valve hole 174 can be formed by, for example, drilling a central portion of the vulcanized seal rubber layer 149 with a sharp jig. The shape of the valve hole in FIGS. 6 to 8 and FIGS. 9 to 11 to be described later is a negative pressure on the inner region 170 side due to the difference between the negative pressure generated by the protrusion 166 in the inner region 170 and the atmospheric pressure in the outer space. The deformed opening shape when sucked is shown, and the valve hole is kept closed by the elasticity of the seal rubber layer 149 under the condition that the internal region 170 is at substantially atmospheric pressure. Further, in each of the embodiments shown in FIGS. 6 to 11, the same reference numerals as those of the first embodiment are attached to the members and parts having the same structure as that of the first embodiment. Thus, detailed description thereof will be omitted.

  Next, FIGS. 9 to 11 show a check valve member 176 as a third embodiment. The valve hole 178 in the check valve member 176 has a protruding portion 166 penetrating in the thickness direction with a tapered-shaped enlarged portion 180 having a gradually decreasing diameter from the inner region 170 side toward the outer space. According to such a shape, when a negative pressure suction force is exerted on the protruding portion 166, the valve hole 178 is greatly opened toward the inner region 170 side, so that the inflow of air from the external space is prevented. More easily done. For example, the valve hole 178 may be formed on the central axis of the enlarged diameter portion 180 of the seal rubber layer 149 after vulcanizing and molding the seal rubber layer 149 obtained by molding the tapered enlarged diameter portion 180 in advance at the protruding tip portion of the protruding portion 166. It can be formed by piercing a needle-shaped sharp jig and penetrating in the thickness direction of the protruding portion 166. Although not shown, the valve hole is formed with a cross-sectional shape as shown in FIG. 11 and with a slit shape that spreads over a predetermined width in the radial direction of the seal rubber layer 149 in the top view as shown in FIG. It is also possible.

  It is also desirable to provide a breathable waterproof film between the internal area of the actuator and the external space in order to prevent fine dust and water droplets that can pass through the valve hole from entering the actuator. Specifically, for example, the air flowing from the external space to the internal region of the actuator by covering the external space side opening of the communication hole 164 of the check valve member 146 in the first embodiment with a breathable waterproof film. Intrusion of dust and water can be almost completely prevented while allowing flow of water. In addition, as a breathable waterproof membrane, it is waterproof to a porous membrane made of a hydrophobic resin such as polytetrafluoroethylene (PTFE) or polyolefin, a porous membrane made of a normal resin in addition to a mesh, a woven fabric or a non-woven fabric. The thing etc. which coated the functional resin are illustrated.

  The present invention is not limited to the automobile engine mount having the shape as illustrated, but can be applied to a so-called cylindrical mount or the like, or a body mount or member mount for an automobile, or a mount in various devices other than an automobile. The present invention can be similarly applied to an anti-vibration device such as a vibration isolator and an anti-vibration actuator used in such an anti-vibration device.

  For example, as an active vibration damper to which the present invention is applied, specifically, the electromagnetic vibrator 114 shown in the first embodiment is replaced with the first and second integrally vulcanized molded products 28 and 32. The lid member 76 is assembled to the opening of the housing 116 independently of each other, and the mounting plate portion 90 of the annular holding fitting 82 is caulked and fixed to the flange portion 130 of the housing 116. That is, in the vibration damper configured as described above, the vibration plate 80 is fixedly attached to the vibration member to be damped as the attachment portion, and the housing 116 including the coil 118 is attached to the vibration member. Accordingly, the housing 116 including the coil 118 can be made to act as a mass that is actively excited with respect to the vibrating member by energization of the coil 118. It can be done.

  In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements and the like 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 longitudinal section showing an engine mount as a first embodiment of the present invention. It is a principal part enlarged view of the engine mount shown in FIG. 4 is a check valve member as a first embodiment constituting a one-way type valve means, and is a cross-section taken along line III-III in FIG. It is a top view of a non-return valve member as a first embodiment constituting a one-way type valve means. It is a principal part enlarged view of the non-return valve member as 1st embodiment which comprises a one-way type valve means. FIG. 8 is a cross-sectional view taken along line VI-VI in FIG. It is a top view of the non-return valve member as 2nd embodiment which comprises a one-way type valve means. It is a principal part enlarged view of the non-return valve member as 2nd embodiment which comprises a one-way type valve means. FIG. 10 is a cross-sectional view taken along line IX-IX in FIG. It is a top view of the non-return valve member as 3rd embodiment which comprises a one-way type valve means. It is a principal part enlarged view of the non-return valve member as 3rd embodiment which comprises a one-way type valve means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Engine mount 12 1st mounting bracket 14 2nd mounting bracket 16 Main body rubber elastic body 76 Cover member 78 Support rubber elastic body 100 Pressure receiving chamber 102 Vibration input chamber 104 Excitation chamber 106 Equilibrium chamber 112 Orifice passage 114 Electromagnetic exciter 116 Housing 140 Through-hole 146 Check valve member 148 Cover plate fitting 149 Seal rubber layer 166 Protruding portion 168 Valve hole

Claims (7)

A coil member is incorporated inside a substantially cup-shaped housing, and an armature to which a driving force is applied by energizing the coil member is disposed so as to be displaceable in the axial direction of the housing, while being output to the opening side of the housing It said output member is caused to spaced members with allowed to elastically supported via the elastic support members relative to the housing, the output member by coupling to the armature, said from the armature by energizing the said coil member In an anti-vibration actuator that applies an excitation force to the output member to cause the output member to be displaced in the axial direction of the housing.
By covering the opening of the housing fluid-tightly with the support rubber elastic body, the region where the coil and the armature are disposed in the housing becomes a sealed region that is cut off from the external space, while passing through the housing. By forming a hole and providing a one-way type valve means in the through hole, leakage of air from the sealed area to the external space through the through hole is suppressed, and air from the external space to the sealed area is suppressed. It flows so as to permit the further
An annular stepped portion is formed on the inner peripheral surface of the through hole, and a lid plate metal fitting having a size that prevents the inward displacement of the vibration-proof actuator by the annular stepped portion is fitted into the through hole, A sealing rubber layer is formed on the inner surface of the lid plate fitting, and the sealing rubber layer is pressed by the lid plate fitting to hold the annular stepped portion in a pressed state, thereby covering the through hole. The one-way type valve means is configured by forming a communication hole in the central portion of the metal plate and extending the seal rubber layer so as to block the communication hole to form an opening / closing hole in the seal rubber layer. An anti-vibration actuator characterized by that. A coil member is incorporated inside a substantially cup-shaped housing, and an armature to which a driving force is applied by energizing the coil member is disposed so as to be displaceable in the axial direction of the housing, while being output to the opening side of the housing The output member is elastically supported with respect to the housing via a supporting rubber elastic body by separating the members and connecting the output member to the armature, thereby energizing the coil member from the armature. In an anti-vibration actuator that applies an excitation force to the output member to cause the output member to be displaced in the axial direction of the housing.
By covering the opening of the housing fluid-tightly with the support rubber elastic body, the region where the coil and the armature are disposed in the housing becomes a sealed region that is cut off from the external space, while passing through the housing. By forming a hole and providing a one-way type valve means in the through hole, leakage of air from the sealed area to the external space through the through hole is suppressed, and air from the external space to the sealed area is suppressed. To allow the inflow of
A guide hole extending on the central axis is provided in the housing, and a guide rod provided in the output member is inserted into the guide hole, and the guide rod is guided by the guide hole in the direction of the central axis of the housing. while the output member as allowed to vibration displacement, characterized in that said hole is provided on the extension of the guide bore in the housing, the guide hole through the vent hole is so caused to open to the outside anti-vibration actuator to be. A coil member is incorporated inside a substantially cup-shaped housing, and an armature to which a driving force is applied by energizing the coil member is disposed so as to be displaceable in the axial direction of the housing, while being output to the opening side of the housing The output member is elastically supported with respect to the housing via a supporting rubber elastic body by separating the members and connecting the output member to the armature, thereby energizing the coil member from the armature. In an anti-vibration actuator that applies an excitation force to the output member to cause the output member to be displaced in the axial direction of the housing.
By covering the opening of the housing fluid-tightly with the support rubber elastic body, the region where the coil and the armature are disposed in the housing becomes a sealed region that is cut off from the external space, while passing through the housing. By forming a hole and providing a one-way type valve means in the through hole, leakage of air from the sealed area to the external space through the through hole is suppressed, and air from the external space to the sealed area is suppressed. To allow the inflow of
A sealing rubber is formed in the through hole so as to project in a substantially dome shape toward the inside of the housing to block the through hole. The protruding end portion of the sealing rubber penetrates in the thickness direction, and the sealing rubber is sealed. anti-vibration actuator, characterized in that to constitute a valve means of the one-way by forming a valve hole which is closed by the elasticity of the stop rubber. The valve hole is anti-vibration actuator according to claim 3 which is formed through the thickness direction of the sealing rubber has a substantially pinhole-like in Ryakuitadaki portion of the sealing rubber. The valve hole is anti-vibration actuator according to claim 3 having a slit shape extending in the axis-perpendicular direction of the sealing rubber disposed through the thickness direction of the sealing rubber. The valve hole is in the sealing claim 3 having a reverse tapered shape which becomes gradually larger in diameter toward the closed region side in the portion over the thickness direction to a predetermined length of the rubber from the sealing region side The vibration-proof actuator as described. The main rubber elastic body connects the first mounting member attached to one member constituting the vibration transmission system by being connected to each other and the second mounting member attached to the other member by the main rubber elastic body. A part of the wall portion is formed by the body to form a pressure receiving chamber in which the incompressible fluid is sealed, and another part of the wall portion of the pressure receiving chamber is configured by a vibration member, and the vibration member In an active vibration isolating mount in which an actuator that exerts an exciting force is provided, and the pressure of the pressure receiving chamber is actively controlled by exciting the excitation member with the actuator.
As the actuator, a coil member is incorporated in a substantially cup-shaped housing, and an armature to which a driving force is applied by energizing the coil member is disposed so as to be displaceable in the axial direction of the housing. By separating the output member on the part side, the output member is elastically supported with respect to the housing via a support rubber elastic body, and the output member is connected to the armature, thereby energizing the coil member. An anti-vibration actuator that applies an oscillating force from the armature to the output member to oscillate and displace the output member in the axial direction of the housing, wherein the opening of the housing is formed by the support rubber elastic body. By covering the fluid tightly, the region where the coil and the armature are disposed in the housing is formed. On the other hand, by forming a through hole in the housing and providing a one-way type valve means in the through hole, the air from the sealed region through the through hole is formed. suppresses the leakage into the outside space, using the anti-vibration actuator which is adapted to permit the inflow of air from the external space into the sealed area, the housing of the actuator for vibration-proof to the second mounting member fixed to contrast, active proof mutabilis mount, characterized in that constitutes the vibrating member by the output member.

Images