JP5154217B2 - Leaf spring for vibration isolator and active fluid-filled vibration isolator, active vibration damper, and electromagnetic actuator using the same - Google Patents

Description

  The present invention relates to a leaf spring for an anti-vibration device used in an anti-vibration device which can be mounted between members constituting a vibration transmission system or a member to be damped to exhibit an anti-vibration effect, and the leaf spring for such an anti-vibration device The present invention relates to an active fluid-filled vibration isolator using the like.

  Conventionally, as a type of vibration isolator, such as a vibration isolator connected to members constituting a vibration transmission system, a vibration isolator support body, or a vibration control apparatus mounted on a vibration suppression target member, the first There is known a vibration isolator in which an attachment member and a second attachment member are connected to each other by a main rubber elastic body. In this vibration isolator, the adoption of a leaf spring as a spring component may be considered. Although it is conceivable to employ a coil spring as a spring component of the vibration isolator, the coil spring has a problem of increasing the axial arrangement space. The leaf spring not only has a characteristic that the damping component is smaller than that of a rubber elastic body, but also achieves higher accuracy than a rubber elastic body in which molding shrinkage is unavoidable. There is also an effect that can be small. Specifically, for example, what is described in FIG. 13 of Patent Document 1 (Japanese Patent Laid-Open No. 2006-300311), Patent Document 2 (Japanese Patent Laid-Open No. 2005-291276), and the like.

  By the way, as described in Patent Document 1 and Patent Document 2, such a leaf spring is generally punched out of a flat stainless steel plate, a spring steel plate, or the like, from the radial center portion to the outer periphery in the radial direction. It is set as the structure which has the some connection arm part which inclines in the circumferential direction toward the part integrally. This is because the spring characteristics can be tuned based on the shape, size, number, arrangement, etc. of the punched holes or connecting arm portions.

  However, in the leaf spring provided with these connecting arm portions, the rigidity in the direction perpendicular to the axis is significantly larger than the rigidity in the direction of the axis. Therefore, when a certain degree of elastic deformation characteristics are required in the direction perpendicular to the axis, There was a problem that it was difficult to apply.

  Specifically, as shown in Patent Document 3 (Japanese Patent Application Laid-Open No. 2002-188777), the energization of a coil on the stator side generates an axial driving force on the output shaft on the mover side. In an electromagnetic actuator to be tightened, an output shaft is elastically supported by a housing of an actuator via a connecting arm portion of a leaf spring, and a mount body and an actuator provided with a vibration plate and the like when the output shaft is coupled to a vibration plate If there is a machining dimensional error or an assembly error in the constituent members, the output shaft and the vibration plate tend to be displaced in the direction perpendicular to the axis. At this time, if the rigidity of the leaf spring in the direction perpendicular to the axis is large, the processing dimension error and the assembly error are not easily absorbed by the elastic deformation in the direction perpendicular to the axis of the leaf spring. As a result, the output shaft or the vibration plate abuts against other members in a direction perpendicular to the shaft with a large force and is not easily displaced in the direction of the drive shaft, which may make it difficult to ensure sufficient stable operation of the actuator. It was.

JP 2006-300311 A JP 2005-291276 A JP 2002-188777 A

  Here, the present invention has been made in the background as described above, and the problem to be solved is that processing dimension errors and assembly errors of the constituent members are effectively reduced by elastic deformation in the direction perpendicular to the axis. By absorbing the vibration, the plate spring for the vibration isolator having a novel structure that can stably drive the connected member such as the vibration plate and the movable element, and the active fluid-filled vibration isolator and the active The object is to provide a vibration damping device and an electromagnetic actuator.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible. Further, 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 an invention that can be understood by those skilled in the art from those descriptions. It should be understood that it is recognized based on thought.

That is, the present invention is characterized by having a central mounting portion to which one connected member is attached and an outer peripheral mounting portion to which the other connected member is attached, and is attached to the central mounting portion and the outer peripheral mounting portion. In the anti-vibration leaf spring for elastically connecting a pair of connected members, the central mounting portion and the outer peripheral mounting portion are both flat and surround the outer peripheral side of the central mounting portion. The outer peripheral mounting portions are arranged in an annular shape, and spiral connecting arm portions extending in the radial direction while being inclined in the circumferential direction from the central mounting portion toward the outer peripheral mounting portion are equally spaced in the circumferential direction. Each of the connecting arm portions has a spiral shape that gradually increases in radius of curvature and spreads smoothly, and has an inclined band plate shape that is inclined in the axial direction. And, each said angle of inclination of the inner peripheral end of each of the connecting arm portion which is connected to a central mounting portion is gradually reduced along with being connected to the central mounting portion, which is connected to the outer peripheral attaching portion By gradually reducing the inclination angle of the outer peripheral side end portion of the connecting arm portion and connecting to the outer peripheral mounting portion, the entire length excluding the inner peripheral end portion and the outer peripheral end portion extends at a constant inclination angle. Each of the connecting arm portions, the central mounting portion, and the outer peripheral mounting portion are integrated in a leaf spring for a vibration isolator.

  In the leaf spring for an anti-vibration device having such a structure according to the present invention, the spring rigidity in the direction perpendicular to the axis is reduced by forming the connecting arm portion in the shape of an inclined band plate inclined in the axial direction. In addition to obtaining, the spring component in the axial direction can be effectively obtained while ensuring the material and the width dimension of the connecting arm. It is also possible to suppress interference between the connecting arm portions in the direction perpendicular to the axis while reducing the gap between the directions of the connecting arm portions in the direction perpendicular to the axis.

  Therefore, compared to a flat plate spring having a conventional structure, the spring rigidity in the direction perpendicular to the axis can be reduced and the degree of freedom in tuning can be improved. In addition, the degree of freedom in tuning the axial direction spring component can be greatly improved. obtain.

  Further, according to the leaf spring for a vibration isolator of the present invention, when one connected member and the other connected member are connected, for example, at least one of the two connected members is displaced in the direction perpendicular to the axis. When there is a machining dimension error or an assembly error, the machining dimension error or the assembly error can be absorbed by elastic deformation in the direction perpendicular to the axis. As a result, the connected member can be prevented from coming into contact with another member in a direction perpendicular to the axis with a large force, and the axial displacement of the connected member can be allowed stably.

  In addition, the vibration isolator in which the leaf spring for the vibration isolator is employed, for example, generates an excitation force corresponding to the vibration to be isolated to actively control the vibration isolation characteristics, And an active anti-vibration device that obtains an active anti-vibration effect by exerting a deviating excitation force on the members constituting the vibration transmission system, and the active anti-vibration device. The apparatus includes an active fluid filled type vibration damping device and an active vibration damping device, which will be described later.

  Moreover, in the leaf | plate spring for vibration isolator which concerns on this invention, the structure where all of the connection arm part is extended by the length of one round or more in the circumferential direction may be employ | adopted. Furthermore, in the leaf spring for vibration isolator according to the present invention, a structure in which three or more connecting arm portions are provided at equal intervals in the circumferential direction may be employed. According to these structures, the proportion of the inclined strip-shaped connecting arm portion in the leaf spring for the vibration isolator increases, and the effect of reducing the spring stiffness in the direction perpendicular to the axis and the degree of freedom in tuning can be improved. .

Further, in the leaf spring for the vibration isolator according to the present invention, the outer peripheral edge is provided with an annular outer peripheral edge that continuously extends over the entire periphery, and the outer peripheral attachment part is configured by the outer peripheral edge. Since the structure can be adopted, the support rigidity of the outer peripheral mounting portion with respect to the connected member is increased, and thus the mounting stability of the leaf spring for the vibration isolator can be improved.

  Further, the present invention is characterized in that the first mounting member and the second mounting member are connected by the main rubber elastic body to form a pressure receiving chamber in which a part of the wall portion is configured by the main rubber elastic body. In addition, an incompressible fluid is sealed in the pressure receiving chamber, while another part of the wall portion of the pressure receiving chamber is constituted by a vibration plate, and an active fluid having an electromagnetic actuator that drives the vibration plate to vibrate In the enclosed vibration isolator, any one of the aforementioned vibration isolator leaf springs is employed as a leaf spring for elastically supporting the output member driven by energization of the electromagnetic actuator to the second mounting member. In the active fluid-filled vibration isolator, the central attachment portion of the device leaf spring is attached to the output member, and the outer periphery attachment portion of the vibration isolator leaf spring is attached to the second attachment member.

  Furthermore, a feature of the present invention is that a mover is mounted so as to be displaceable with respect to the stator, and a coil member is assembled to one of the stator and the mover to attach to the coil member. Adopting an electromagnetic actuator that drives the mover relative to the stator by the action of the magnetic field generated by energization, and attaches the stator to the vibration target member, and the mover via the support plate spring In an active vibration damping device that is elastically supported with respect to a vibration damping target member, the vibration damping device leaf spring described in any one of the above is adopted as the supporting leaf spring, and the vibration damping device leaf spring is In the active vibration damping device, the central attachment portion is attached to one side of the mover and the stator, and the outer peripheral attachment portion of the leaf spring for the vibration isolator is attached to the other side of the mover and the stator.

  In addition, a feature of the present invention is that a mover is mounted so as to be displaceable with respect to the stator, and a coil member is assembled to one of the stator and the mover to energize the coil member. In the electromagnetic actuator that drives the mover relative to the stator by the action of the magnetic field generated by the magnetic field, the vibration isolator as described in any one of the above as a leaf spring for elastically connecting the mover and the stator Electromagnetic plate springs are used, and the center mounting part of the vibration isolator plate spring is attached to one of the mover and the stator, and the outer periphery mounting part of the vibration isolator plate spring is attached to the other of the mover and the stator. The type actuator.

  In these active fluid-filled vibration damping devices, active vibration damping devices, and electromagnetic actuators constructed according to the present invention, an output member, a mover, and the like constituting one connected member are connected to the other connected member. As a leaf spring for elastically connecting and supporting the second mounting member and the stator constituting the plate spring for the vibration isolator having the connecting arm portion having the inclined band plate shape as described above is employed. In addition to the reduction of the spring rigidity in the direction perpendicular to the axis and the improvement of the degree of tuning freedom, the degree of freedom of tuning of the spring component in the axis direction can also be improved.

  In particular, if there is a machining dimension error or assembly error to the extent that at least one of the two connected members is displaced in the direction perpendicular to the axis, the machining dimension error or assembly error is elastically deformed in the direction perpendicular to the axis of the leaf spring for the vibration isolator. Can also be absorbed.

  Therefore, the output member and the mover constituting one of the connected members are prevented from coming into contact with other members with a large force in the direction perpendicular to the axis, and the axial displacement of the output member and the mover is stabilized. The anti-vibration effect is obtained stably.

  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 according to an active fluid-filled vibration isolator using a leaf spring for a vibration isolator of the present invention. This automobile 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. Yes. The first mounting bracket 12 is attached to the power unit side of an automobile (not shown), and the second mounting bracket 14 is attached to the body side of the automobile (not shown), whereby the power unit is attached to the vehicle body via the engine mount 10. It is designed to be elastically supported.

  1 shows the state of the engine mount 10 alone before being mounted on the automobile, but in the mounted state on the automobile, the shared support load of the power unit is in the mount axis direction (in FIG. ) Is displaced in a direction in which the first mounting bracket 12 and the second mounting bracket 14 approach each other in the mount axis direction, and the main rubber elastic body 16 is elastically deformed. In addition, under such a mounted state, main vibrations to be vibrated are input substantially in the mount axis direction. In the following description, unless otherwise specified, the vertical direction refers to the vertical direction in FIG.

  More specifically, the first mounting member 12 has an inverted bottomed cylindrical shape or a columnar shape. Further, the central portion of the first mounting bracket 12 is provided with a screw hole 22 opened to the upper end surface, and a member on the power unit side (not shown) is screwed and fixed to the screw hole 22 via a fixing bolt. The first mounting bracket 12 is fixedly attached to the power unit.

  The second mounting bracket 14 has a large-diameter substantially stepped cylindrical shape, and a small-diameter portion 26 extends upward from the inner peripheral edge of the annular plate-shaped step portion 24. A large-diameter portion 28 extends downward from the outer peripheral edge portion of the step portion 24. The axial dimension of the small diameter portion 26 is made larger than the axial dimension of the large diameter portion 28.

  The first mounting bracket 12 and the second mounting bracket 14 are disposed on the same central axis, and the first mounting bracket 12 is an opening on the small diameter portion 26 side of the second mounting bracket 14. It is opposed to the portion at a predetermined distance in the axial direction. A main rubber elastic body 16 is interposed between the first mounting bracket 12 and the second mounting bracket 14.

  The main rubber elastic body 16 is a thick rubber elastic body having a generally truncated truncated cone shape as a whole, and has a large-diameter recess having an inverted mortar shape or a hemispherical shape that opens downward at the center of the lower end thereof. 30 is formed. The rubber elastic body 16 is vulcanized and bonded to the upper end portion of the main rubber elastic body 16 so as to embed a portion from the axially intermediate portion to the lower end portion of the first mounting bracket 12. The inner peripheral surface from the upper end portion of the small-diameter portion 26 of the second mounting member 14 to the intermediate portion in the axial direction is overlapped and vulcanized and bonded to the outer peripheral surface. Thus, the main rubber elastic body 16 is formed as an integrally vulcanized molded product integrally including the first mounting bracket 12 and the second mounting bracket 14, and one of the second mounting brackets 14 (FIG. 1, the upper opening is fluid-tightly closed by the main rubber elastic body 16. A thin seal rubber layer 32 integrally formed with the main rubber elastic body 16 is attached to the entire inner peripheral surface from the axially intermediate portion to the lower end portion of the small diameter portion 26 of the second mounting bracket 14. Is formed. The outer peripheral edge portion of the opening end face of the large-diameter recess 30 in the main rubber elastic body 16 is positioned on the inner side in the direction perpendicular to the inner peripheral surface of the seal rubber layer 32, so that the main rubber elastic body 16 and the seal rubber are At the boundary portion of the layer 32, an annular stepped portion 34 that extends in an annular shape in the direction perpendicular to the axis is formed.

  In addition, a partition member 36 is assembled in the opening portion on the lower side in the axial direction of the second mounting bracket 14. The partition member 36 has a substantially circular block shape as a whole, and is formed using a hard member such as a metal material or a synthetic resin material. The partition member 36 includes a partition member body 38, a first partition plate 40, and a second partition plate 42.

  As shown in FIG. 2, the partition member main body 38 has a substantially circular block shape, and a large-diameter annular outer flange portion 44 is integrally formed at the upper end portion of the partition member main body 38. Has been. Moreover, the outer peripheral surface from the axial direction intermediate part of a partition member main body 38 to a lower end part has a taper shape in which a radial dimension becomes small gradually toward the downward direction.

  A circular central hole 46 as a through hole is formed in the central portion of the partition member main body 38 so as to extend in the axial direction, and penetrates the upper and lower end faces of the partition member main body 38. An annular stepped portion 48 is formed on the peripheral wall portion of the substantially central portion in the axial direction of the central hole 46, and the diameter of the upper portion of the central hole 46 across the stepped portion 48 is the diameter of the lower portion. It is larger than the dimensions. An inner flange-like portion 50 is integrally formed in the lower opening portion of the central hole 46. A plurality of screw holes 52 are provided around the upper opening of the central hole 46 in the partition member main body 38 and at the stepped portion 48 at a predetermined distance in the circumferential direction. Further, a communication window 54 is provided in the thickness direction (up and down in FIG. 1) in the outer peripheral portion of the partition member main body 38 or the inner peripheral portion of the outer flange-shaped portion 44. Furthermore, a communication passage 56 extending in a radial tunnel shape is formed at one place on the circumference of the peripheral wall portion of the partition member main body 38, and the peripheral wall surface of the large diameter portion of the central hole 46 of the partition member main body 38 is formed. An opening is formed on the outer peripheral surface of the partition member main body 38.

  Moreover, the 1st partition plate 40 is exhibiting the thick substantially disc shape, and the circular recessed central recess 58 opened below is provided in the center part. A small-diameter insertion hole 60 is provided in the central portion of the upper bottom portion of the central recess 58, and a through-hole 62 including a plurality of small holes is provided around the insertion hole 60 in the upper bottom portion. Has been. Further, an annular bowl-shaped portion 64 is integrally formed on the upper peripheral edge of the first partition plate 40.

  Further, the second partition plate 42 is thinner than the first partition plate 40 and has a large-diameter substantially disk shape, and a small-diameter insertion hole 66 is provided through the center portion. In addition, a through hole 68 made up of a plurality of small holes is provided around the insertion hole 66. The outer diameter dimension of the second partition plate 42 is larger than the outer diameter dimension of the flange-shaped portion 64 of the first partition plate 40, and the outer diameter size of the outer flange-shaped portion 44 of the partition member body 38 is It is almost the same.

  The first partition plate 40, the second partition plate 42, and the partition member main body 38 are overlapped with each other in the axial direction so that the second partition plate 42 is sandwiched between the first partition plate 40 and the partition member main body 38. The axes are positioned on the same straight line. The support bolt 70 passes through the first and second partition plates 40 and 42 in the axial direction, and is screwed and fixed to a screw hole 52 opened in the upper end surface of the partition member main body 38. Since the axially intermediate portion or the head portion is positioned in the through hole of the first and second partition plates 40 and 42, the first and second partition plates 40 and 42 and the partition member main body 38 are perpendicular to the axis. The positioning state in the direction is maintained, and the partition member 36 is configured.

Further, a flange portion 64 of the first partition plate 40 and the outer peripheral portion of the second partition plate 42 is provided opposition position at a predetermined distance in the axial direction, of flange portion 6 4 lower end surface and the first partition wall The outer peripheral surface of the peripheral wall portion of the plate 40 and the upper end surface of the second partition plate 42 cooperate to have a predetermined length in the circumferential direction in a cross section in which the outer peripheral portion of the partition member 36 is opened concavely outward in the radial direction. A circumferential groove 72 extending (for example, slightly less than one round) is formed.

  Further, the opening portion of the central recess 58 of the first partition plate 40 is covered with the central portion of the second partition plate 42, so that the first partition plate 40 and the second partition plate 42 are axially arranged. A circular region 74 extending in a substantially constant circular cross section is formed.

  Such a partition member 36 is inserted in the axial direction from the lower opening of the second mounting bracket 14, and the flange portion 64 of the first partition plate 40 is overlaid on the annular step portion 34 of the main rubber elastic body 16. In addition, the outer peripheral portion of the second partition plate 42 is superimposed on the stepped portion 24 via the seal rubber layer 32 of the second mounting bracket 14. Thereby, the insertion end of the partition member 36 in the axial direction with respect to the second mounting bracket 14 is defined.

  Below the partition member 36, a diaphragm 76 as a flexible film is disposed. The diaphragm 76 is formed of a thin circular rubber film having sufficient slackness. A fixing metal 78 is vulcanized and bonded to the outer peripheral edge of the diaphragm 76. The fixing bracket 78 has a form in which an inner flange-like portion extending radially inward is integrally provided at the lower end portion of the large-diameter ring shape. The outer peripheral edge portion of the diaphragm 76 is vulcanized and bonded to the inner peripheral edge portion of the fixing bracket 78, and a thin seal rubber layer 80 integrally formed with the diaphragm 76 is formed on the inner peripheral surface of the fixing bracket 78 over substantially the entire surface. It is vulcanized and bonded.

  A fixing bracket 78 of the diaphragm 76 is inserted in the axial direction from an opening on the lower side (large diameter portion 28 side) of the second mounting bracket 14, and an upper end portion of the fixing bracket 78 is inserted into the second through the seal rubber layer 80. And the inner peripheral edge of the lower side of the fixing bracket 78 is overlapped with the outer peripheral portion of the outer flange-shaped portion 44 of the partition member main body 38 via the seal rubber layer 80. They are superimposed in the axial direction.

  Further, a first bracket fitting 82 and a second bracket fitting 84 are assembled to the second mounting bracket 14. The first bracket fitting 82 has an annular plate shape. The second bracket fitting 84 has a cylindrical shape, and a stepped portion 86 extending continuously in the circumferential direction is formed on the inner peripheral edge on the upper side in the axial direction. When the first bracket fitting 82 and the second bracket fitting 84 are overlapped in the axial direction, the lower end surface on the inner peripheral side of the first bracket fitting 82 is the upper end surface of the step portion 24 of the second mounting bracket 12. While being overlaid, a stepped portion (stepped surface) 86 of the second bracket fitting 82 is overlaid on the lower end surface of the fixing fitting 78 of the diaphragm 76.

As will be described later, when the first bracket fitting 82 and the second bracket fitting 84 are bolted in the axial direction, the stepped portion 24 of the second mounting bracket 14 and the fixing bracket 78 are disposed in the axial direction. The radially inner periphery of the flange portion 64 of the first partition plate 40 and the annular stepped portion 34 of the main rubber elastic body 16, the outer peripheral portion of the second partition plate 42, and the step portion 24 of the second mounting bracket 14. The portion or middle portion, the upper end portion of the fixing bracket 78 and the outer peripheral portion of the stepped portion 24 are fluid-tightly overlapped with each other via the seal rubber layers 32 and 80, respectively. Accordingly, the partition member 36 and the diaphragm 76 are fixedly assembled to the second mounting bracket 14 based on the fixing of the first and second bracket fittings 82 and 84 to the second mounting bracket 14. by the partition member 32 and the diaphragm 7 6, the lower opening of the second mounting member 14 is fluid-tightly closed. Further, the first and second bracket fittings 82 and 84 are fixed to a vehicle body side member (not shown), so that the second attachment fitting 14 is fixedly attached to the vehicle body. .

  In this way, the partition member 36 and the diaphragm 76 are assembled into the integrally vulcanized molded product of the main rubber elastic body 16 provided with the first and second mounting brackets 12 and 14, thereby sandwiching the partition member 36. In the region where the large-diameter recess 30 of the main rubber elastic body 16 is closed by the partition member 36 on one side in the axial direction (upper in FIG. 1), a part of the wall portion is configured by the main rubber elastic body 16. Thus, a pressure receiving chamber 90 is formed in which pressure fluctuation is caused when vibration is input. Further, on the other side in the axial direction with respect to the partition member 36 (downward in FIG. 1), an equilibrium chamber 92 is formed in which a part of the wall portion is made of a diaphragm 76 and volume change is easily allowed. Yes. The pressure receiving chamber 90 and the equilibrium chamber 92 are filled with an incompressible fluid. For example, water, alkylene glycol, polyalkylene glycol, silicone oil, or the like is employed as the incompressible fluid to be enclosed. In order to effectively obtain a vibration isolation effect based on a fluid action such as a resonance action of the fluid. It is desirable to employ a low viscosity fluid of 0.1 Pa · s or less. Further, the incompressible fluid is sealed in the pressure receiving chamber 90 or the equilibrium chamber 92, for example, the partition member 36 for the integrally vulcanized molded product of the main rubber elastic body 16 including the first and second mounting brackets 12 and 14. And the diaphragm 76 are preferably realized by performing the assembly in an incompressible fluid.

  Further, as the partition member 36 is assembled to the second mounting bracket 14, the opening portion of the circumferential groove 72 of the partition member 36 is second through the seal rubber layer 32 attached to the second mounting bracket 14. The peripheral groove 72 is fluid-tightly closed by being fluid-tightly superimposed on the inner peripheral surface of the mounting bracket 14. One end portion in the circumferential direction of the circumferential groove 72 is connected to the pressure receiving chamber 90 through a communication window 94 formed in the upper end portion of the first partition plate 40, and the other end portion in the circumferential direction of the circumferential groove 72 is connected to the pressure receiving chamber 90. A communication window 96 formed in the intermediate portion in the radial direction of the second partition plate 42 is connected to the equilibrium chamber 92 through the communication window 54 of the partition member main body 38. Thereby, the inner peripheral surface of the second mounting member 14, the wall surface of the peripheral groove 72, and the communication windows 54, 94, 96 cooperate to extend the outer peripheral portion of the partition member 36 in the circumferential direction by a predetermined length. A first orifice passage 98 as an orifice passage is formed, and the pressure receiving chamber 90 and the equilibrium chamber 92 are communicated with each other through the first orifice passage 98, and the first chamber 90 and 92 are connected to each other. Fluid flow through the orifice passage 98 is allowed.

  Further, a vibration plate 100 is disposed on the small diameter side of the central hole 46 of the partition member main body 38. The vibration plate 100 has a thin, substantially disk shape, and is formed using a hard synthetic resin material, a metal material, or the like. A boss-like protrusion 102 having a small-diameter cylindrical shape protrudes upward from the central portion of the vibration plate 100, and an inner hole of the boss-like protrusion 102 opens to the lower end surface of the vibration plate 100. By doing so, an insertion hole 104 is formed on the central axis of the vibration plate 100. Further, a substantially cylindrical rim-shaped protrusion 106 that protrudes downward in the axial direction is integrally formed on the outer peripheral edge of the vibration plate 100.

The connecting rod 108 is vulcanized and bonded to the central portion of the diaphragm 76. The connecting rod 108 is a hard rod-like member extending in the axial direction, and a screw hole 110 that opens to the upper end surface is provided on the upper side in the axial direction. Further, in the axially medial section of the connecting rod 108, flange portion 116 extending radially outward be integrally formed, the central portion of the diaphragm 7 6 relative to the outer peripheral portion of the flange portion 116 is bonded by vulcanization Yes. Thereby, the connecting rod 108 body is vulcanization bonded to the diaphragm 76 with a form that penetrates the central portion of the diaphragm 76, the lower portion of the upper with a threaded hole 110 opposite across the flange portion 116, the diaphragm 7 6 It extends greatly downward from.

  The upper end surface of the connecting rod 108 and the lower end surface of the central portion of the vibration plate 100 are overlapped with each other in the axial direction, and the fixing bolt 118 is inserted into the insertion hole 104 from above the vibration plate 100 to thread the connection rod 108. The hole 110 is fixed by screwing.

  Thus, the vibration plate 100 and the connecting rod 108 are connected in the axial direction, and the rim-shaped protrusion 106 of the vibration plate 100 is disposed along the peripheral wall portion of the central hole 46 of the partition member body 38. The vibration plate 100 and the central hole 46 are arranged substantially coaxially. The vibration plate 100 is opposed to the second partition plate 42 covering the upper opening of the central hole 46 of the partition member body 38 with a predetermined distance in the axial direction. Here, a minute gap is formed between the outer peripheral portion of the vibration plate 100 provided with the rim-shaped protrusion 106 and the peripheral wall portion of the central hole 46, and the shaft of the vibration plate 100 is formed by the existence of such a gap. Directional displacement is preferably allowed. Whether or not the fluid flow or the like through the gap is generated is not particularly limited, but in the present embodiment, the gap is so small that the fluid flow or the like through the gap is not substantially generated. It is supposed to be. As a result, the lower opening of the central hole 46 of the partition member main body 38 is substantially closed by the vibration plate 100.

  Here, a boss-like protrusion 102 protruding from the central portion of the vibration plate 100 is supported by the partition member main body 38 via a vibration plate support plate spring 120 as a plate spring for the vibration isolator.

  As shown in FIGS. 3 to 6, the vibration plate supporting plate spring 120 has a thin disk shape formed of spring steel, stainless steel or the like, and is attached to the central portion in the radial direction. A portion 122 is formed, and an outer peripheral attachment portion 124 is formed in the radially outer peripheral portion. The center attachment portion 122 has a substantially annular plate shape and includes a circular center hole 126 in the center portion. Further, the outer peripheral mounting portion 124 is an annular outer peripheral plate portion that continuously extends the outer peripheral portion of the vibration plate supporting plate spring 120 over the entire periphery. A plurality of outer peripheral insertion holes 128 are provided in the outer peripheral attachment portion 124 at predetermined intervals (equal intervals in this embodiment).

  In addition, a plurality of slits 130 are provided between the central mounting portion 122 and the outer peripheral mounting portion 124 of the vibration plate supporting plate spring 120 as the lightening portions. The slit 130 is formed by punching the vibration plate supporting plate spring 120 or the like, and has a spiral shape extending in the radial direction while being inclined in the circumferential direction from the central mounting portion 122 toward the outer peripheral mounting portion 124. . In particular, in this embodiment, a pair of slits 130 are provided at equal intervals in the circumferential direction.

  As a result, the central mounting portion 122 and the outer peripheral mounting portion 124 are a pair of connecting arms formed of a portion excluding the pair of slits 130, 130 in the annular portion between the mounting portions 122, 124 of the vibration plate support plate spring 120. The parts 132 and 132 are substantially connected. The connecting arm portion 132 has a substantially constant width dimension and has a spiral shape extending in the radial direction while being inclined in the circumferential direction from the central mounting portion 122 toward the outer peripheral mounting portion 124. Is provided.

  In particular, in this embodiment, a pair of connecting arm portions 132 are provided at equal intervals in the circumferential direction, so that the end portion connected to the central mounting portion 122 of each connecting arm portion 132 is the vibration plate supporting plate spring 120. The end portions of the connecting arm portions 132 connected to the outer peripheral mounting portion 124 sandwich the central axis of the vibration plate supporting plate spring 120. They are opposed to each other in one direction perpendicular to the axis. The end connected to the central mounting portion 122 side of the connecting arm portion 132 and the end connected to the outer peripheral mounting portion 124 side may be positioned on the same axis perpendicular direction line. In the embodiment, they are positioned on different axes perpendicular to each other. Further, the connecting arm portion 132 extends in the circumferential direction with a length of one turn and approximately ¼ turn, that is, a length of one turn or more. In addition, since the plurality of connecting arm portions 132, slits 130, and outer peripheral insertion holes 128 have the same form and are formed at equal intervals in the circumferential direction, the circumferential direction of the vibration plate supporting plate spring 120 Positioning is unnecessary.

  Here, the connecting arm portion 132 is subjected to a punching process for forming the slit 130 and a bending process, etc., so that the connecting arm part 132 is inclined with respect to the axial direction of the vibration plate supporting plate spring 120. It is made into the shape of the inclination strip | belt plate continuously extended in the circumferential direction in the axial cross section of a shape. The inclination angle α of the connecting arm portion 132 with respect to the axis perpendicular direction line L: is appropriately set and changed according to the required spring characteristics, preferably 10 ° ≦ α ≦ 80 °, more preferably 30 ° ≦ α ≦ 60 °. If the cover is tilted and the inclination angle α is smaller than 10 °, it is difficult to sufficiently reduce the spring rigidity in the direction perpendicular to the axis of the vibration plate supporting plate spring 120, while the inclination angle α is larger than 80 °. This is because the spring component in the axial direction of the vibration plate supporting plate spring 120 may not be sufficiently obtained.

  In particular, in the present embodiment, the connecting arm portion 132 extends at a constant inclination angle α over substantially the entire length in the circumferential direction. Further, the central portion in the width direction of the connecting arm portion 132 is positioned at substantially the same axial height as the central mounting portion 122 and the outer peripheral mounting portion 124, and the outer peripheral edge portion and the inner peripheral edge portion of the connecting arm portion 132 are It is positioned axially outward from the central mounting portion 122 and the outer peripheral mounting portion 124. In addition, in a state where the vibration plate support plate spring 120 described later is attached to the vibration plate 100 and the partition member 36, the axial cross section of the connecting arm portion 132 is directed upward in the axial direction as it goes radially outward. It is an inclined plate shape that inclines.

  The fixing bolt 118 is inserted into the center hole 126 of the vibration plate supporting plate spring 120, and the central mounting portion 122 of the vibration plate supporting plate spring 120 is connected to the head portion of the fixing bolt 118 and the boss of the vibration plate 100. The axial protrusions 102 are clamped between the axial directions based on the fixing fixing force of the fixing bolt 118. The outer peripheral mounting portion 124 of the vibration plate supporting plate spring 120 is placed on the stepped portion 48 of the central hole 46 of the partition member main body 38, and the outer peripheral insertion hole 128 of the outer peripheral mounting portion 124 is a screw hole of the stepped portion 48. The bolts and screws are inserted into the outer peripheral insertion holes 128 and fixed to the screw holes 52. Accordingly, the vibration plate support plate spring 120 is disposed so as to spread in the direction perpendicular to the axis inside the partition member main body 38, and the vibration plate support plate spring 120 sandwiches the vibration plate 100 in one axial direction. The boss-like protrusion 102 on the side (upper in FIG. 1) is elastically connected and supported to the partition member main body 38 in the axial direction.

  That is, as the boss-like protrusion 102 and the connecting rod 108 of the vibration plate 100 are displaced in the axial direction, the vibration plate supporting plate spring 120 is also elastically deformed in the axial direction. The central hole 46 of the main body 38 can be displaced in the axial direction. Further, since the vibration plate 100 is positioned in the direction perpendicular to the axis by the vibration plate support plate spring 120, the state where the vibration plate 100 and the partition member main body 38 are positioned coaxially is maintained.

  Further, the region between the vibration plate 100 and the second partition plate 42 in the partition member 36 has through holes 62 and 68 penetrating the first and second partition plates 40 and 42 and the first partition plate 40 and the first partition plate 40. The pressure receiving chamber 90 is communicated with each other through a circular region 74 between the two partition plates 42, and the same incompressible fluid as that of the pressure receiving chamber 90 is sealed in this region. That is, the pressure variation of the pressure receiving chamber 90 is directly applied to the region between the vibration plate 100 and the second partition plate 42 through the through holes 62 and 68 and the circular region 74. Act as part. As is clear from the above description, another part of the wall portion different from the main rubber elastic body 16 in the pressure receiving chamber 90 is constituted by the vibration plate 100.

  In other words, on one side of the partition member 36 sandwiching the first and second partition plates 40 and 42 (upper in FIG. 1), a part of the wall portion is configured by the main rubber elastic body 16. One pressure receiving chamber 142 is formed, and on the other side (lower in FIG. 1) between the first and second partition plates 40, 42 of the partition member 36, a part of the wall portion is the vibration plate 100. A second pressure receiving chamber 144 is formed, and the pressure receiving chamber 90 is configured including the first pressure receiving chamber 142 and the second pressure receiving chamber 144. That is, the partition member that partitions the pressure receiving chamber 90 includes the first partition plate 40 and the second partition plate 42. Further, the filter orifice that allows the first pressure receiving chamber 142 and the second pressure receiving chamber 144 to communicate with each other includes through holes 62 and 68 formed in the first and second partition plates 40 and 42 and a circular region 74. ing.

  Further, the region between the vibration plate support plate spring 120 and the vibration plate 100 through the slit 130 of the vibration plate support plate spring 120 also includes a region between the vibration plate support plate spring 120 and the second partition plate 42. Similarly, the incompressible fluid is sealed, and this region is a part of the second pressure receiving chamber 144.

  In particular, in the present embodiment, the resonance frequency of the fluid that is caused to flow through the filter orifice including the above-described through holes 62 and 68 and the circular region 74 is an intermediate speed in which an active vibration isolation effect by the vibration plate 100 is obtained. Or, it is tuned to a high frequency range of about 80 to 100 Hz corresponding to high-speed booming sound or the like.

  In addition, one end of the communication path 56 formed in the partition member main body 38 is connected to the second pressure receiving chamber 144, and the other end of the communication path 56 is connected to the equilibrium chamber 92. That is, the communication passage 56 forms a second orifice passage 146 that allows the second pressure receiving chamber 144 and the equilibrium chamber 92 to communicate with each other, and the two passages 92 and 144 pass through the second orifice passage 146. Fluid flow is allowed.

  In particular, in the present embodiment, the resonance frequency of the fluid that flows through the first orifice passage 98 is effective for, for example, vibration in a low frequency region around 10 Hz corresponding to an engine shake or the like based on the resonance action of the fluid. It is tuned so as to exhibit a strong anti-vibration effect (high damping effect). On the other hand, the resonance frequency of the fluid that is caused to flow through the second orifice passage 146 is, for example, based on the resonance action of the fluid with respect to vibration in the middle frequency range of about 20 to 40 Hz corresponding to idling vibration, low-speed booming sound, and the like. It is tuned to obtain an effective anti-vibration effect. That is, the tuning frequency of the second orifice passage 146 is set to a high frequency region as compared with the tuning frequency of the first orifice passage 98, and is configured by the aforementioned through holes 62 and 68 and the circular region 74. The tuning frequency of the filter orifice is set in a high frequency range as compared with the first and second orifice passages 98 and 146. Tuning of the first orifice passage 98, the second orifice passage 146, and the filter orifice changes, for example, the rigidity of the wall springs of the pressure receiving chamber 90 and the equilibrium chamber 92, that is, the chambers 90 and 92 are changed by a unit volume. This is done by adjusting the passage length and passage cross-sectional area of each orifice passage while considering the characteristic values based on the respective elastic deformation amounts of the main rubber elastic body 16 and the diaphragm 76 corresponding to the amount of pressure change required for In general, the frequency at which the phase of the pressure fluctuation transmitted through the orifice passage changes to a substantially resonant state can be grasped as the tuning frequency of the orifice passage.

  A movable plate 148 is accommodated in the circular region 74 of the partition member 36. The movable plate 148 is made of a rubber elastic body and has a substantially disk shape that is slightly smaller than the circular region 74. A gap is provided over the entire circumference between the peripheral wall portion of the circular region 74, that is, the peripheral wall portion of the central recess 58 of the first partition plate 40 and the outer peripheral edge portion of the movable plate 148. Further, the thickness dimension of the movable plate 148 is made smaller than the axial dimension of the circular region 74. The pressure of the first pressure receiving chamber 142 is applied to one surface (upper in FIG. 1) of the movable plate 148 through the through-hole 62 of the first partition plate 40, and The pressure of the second pressure receiving chamber 144 is applied to the other surface (the lower side in FIG. 1) through the through hole 68 of the second partition plate 42. As a result, the movable plate 148 covers the center hole 46 of the partition member 36 based on the relative pressure difference between the first pressure receiving chamber 142 and the second pressure receiving chamber 144 in the axial direction. Displaceable.

  Note that guide shaft portions 150 and 150 are projected from the central portion of the movable plate 148 so as to protrude outward on both sides in the axial direction, and when the movable plate 148 is accommodated in the circular region 74. In addition, each guide shaft 150 is inserted through holes 60 and 66 that penetrate through the central portions of the first partition plate 40 constituting the upper wall portion of the circular region 74 and the second partition plate 42 constituting the lower wall portion. The movable plate 148 is positioned in a direction perpendicular to the axis with respect to the circular region 74. Further, since both surfaces of the movable plate 148 have an uneven shape, the hitting sound is reduced based on the fact that the hitting portions of the movable plate 148 against the first partition plate 40 and the second partition plate 42 are reduced. In addition, since the effective area of the movable plate 148 is ensured to be large, the pressure of the first and second pressure receiving chambers 142 and 144 is efficiently exerted on the movable plate 148. In particular, the resonance frequency of the movable plate 148 is tuned to a medium frequency range such as idling vibration and medium-speed booming noise, which is in the same range as the tuning frequency range of the second orifice passage 146. The frequency range is set to a lower frequency range than the high excitation frequency range or the resonance frequency of the filter orifice.

Below the second mounting member 1 4, the electromagnetic actuator 15 1 is disposed. In this electromagnetic actuator 15 1, together with the yoke member 154 serving as a stator to the outer peripheral side of the movable member 152 as a movable element is spaced apart, and has a structure in which the coil 156 is assembled to the yoke member 154 . The movable member 152 is driven in the axial direction with respect to the stator (yoke member 154) by the action of a magnetic field generated between the movable member 152 and the yoke member 154 by energization of the coil 156. .

  Specifically, the coil 156 has a cylindrical shape extending in the axial direction so as to be wound in the circumferential direction, and the surface of the coil 156 is covered with an electrical insulating layer 158. Further, the yoke member 154 is made of a ferromagnetic material and is disposed so as to surround the periphery of the coil 156 except for the inner peripheral surface side, so that a magnetic path is formed so as to surround the periphery. In the magnetic path, a magnetic gap is formed in the inner peripheral portion of the coil 156, and a movable member 152 is disposed at a position corresponding to the magnetic gap.

  The movable member 152 is made of a ferromagnetic material having a substantially cylindrical shape. Further, an inner flange-like engagement protrusion 160 is provided on the inner peripheral surface of the movable member 152. Further, a cylindrical sliding sleeve 162 is disposed between the movable member 152 and the coil 156, and the movable member 152 is inserted into the sliding sleeve 162 and axially along the sliding sleeve 162. Accordingly, the movable member 152 is movable in the axial direction with respect to the yoke member 154.

  The yoke member 154 is assembled with a third bracket fitting 164 and a fourth bracket fitting 166. The third bracket fitting 164 has an annular plate shape. The fourth bracket fitting 166 has a substantially cylindrical shape, and an outer flange-shaped portion 168 is formed on the outer peripheral edge on the upper side in the axial direction, and a circumferential direction is formed on the inner peripheral edge on the upper side in the axial direction. A notch-shaped stepped portion 170 extending continuously is formed. The peripheral wall of the fourth bracket metal fitting 166 is provided with a hole for projecting and arranging a connector for supplying external power to the coil 156 outward. Further, an inner flange-shaped portion 174 is projected from the lower end portion of the fourth bracket metal fitting 166. Here, an outer flange-shaped locking fitting 176 is externally attached to an intermediate portion of the yoke member 154 in the axial direction, and the locking fitting is attached when the yoke member 154 is inserted into the fourth bracket fitting 166. 176 is overlapped and locked to the stepped portion 170 of the fourth bracket fitting 166. Further, the third bracket metal 164 is overlapped from above the fourth bracket metal fitting 166 and fixed to each other with the fixing bolt 178, so that the locking metal fitting 176 has the third bracket metal fitting 164 and the fourth bracket metal fitting 166. It is pinched between the axial directions. As a result, the yoke member 154 is fixedly supported by the bracket fittings 164 and 166 at the axially intermediate portions of the third and fourth bracket fittings 164 and 166 via the locking fitting 176.

  In addition, a connecting rod 108 that protrudes downward from the diaphragm 76 on its central axis is inserted into the movable member 152. The connecting rod 108 is inserted into the engaging protrusion 160 of the movable member 152 while being inserted through the central hole of the movable member 152, and the lower end of the connecting rod 108 in the axial direction is the inner side of the movable member 152. It is located in. At the lower end portion of the connecting rod 108 positioned inside the movable member 152, a lock bolt structure is formed, and a positioning nut 182 is screwed. Using a hexagon wrench or the like, the connecting rod 108 provided with a lock bolt is rotated relative to the positioning nut 182 to adjust the screwing amount of the positioning nut 182 with respect to the connecting rod 108, thereby moving the movable member 152 in the connecting rod 108. It is possible to change the setting of the protruding position from the side, and thus the axial height of the vibration plate 100.

  Further, the lid member 184 is assembled to the lower opening of the movable member 152 so as to cover the opening, so that the lower end portion of the connecting rod 108 having the positioning nut 182 is accommodated in the movable member 152. It is arranged with. In addition, a male screw portion 188 having a tip portion reduced in diameter via a stepped portion 186 protrudes downward in the axial direction at the central portion of the lid member 184 located on the central axis of the movable member 152. ing.

  Here, the lower end side in the axial direction of the movable member 152 provided with the lid member 184 is supported by the fourth bracket fitting 166 via a mover support plate spring 190 as a plate spring for a vibration isolator. The mover support plate spring 190 has substantially the same structure as the vibration plate support plate spring 120 as shown in FIGS. 3 to 6 and is larger than the vibration plate support plate spring 120. That is, an annular plate-shaped central mounting portion 192 is formed at the radial center portion of the mover support plate spring 190, and the outer peripheral edge portion is continuously extended over the entire circumference in the radial outer peripheral portion. An outer peripheral mounting portion 194 having an annular outer peripheral plate portion structure extending in the direction is formed. The central portion of the central mounting portion 192 includes a circular center hole 196, and a plurality of outer peripheral insertion holes 198 are provided in the outer peripheral mounting portion 194 at predetermined intervals (equal intervals in the present embodiment). ing.

  In addition, a pair of spiral slits 200 extending at least one round in the circumferential direction is provided at equal intervals in the circumferential direction between the central mounting portion 192 and the outer circumferential mounting portion 194 of the mover support plate spring 190. Yes. As a result, in the annular portion between the central mounting portion 192 and the outer peripheral mounting portion 194 of the vibration plate supporting plate spring 120, a spiral extending at least one round in the circumferential direction is provided in a portion excluding the pair of slits 200, 200. A pair of connection arm portions 202 are provided at equal intervals in the circumferential direction, and the central attachment portion 192 and the outer periphery attachment portion 194 are substantially connected by the pair of connection arm portions 202 and 202. Here, similarly to the connecting arm portion 132 of the vibration plate supporting plate spring 120, the connecting arm portion 202 of the mover supporting plate spring 190 also has a predetermined angle α relative to the axial direction of the mover supporting plate spring 190. It is made into the inclination strip | belt-plate shape extended continuously in the circumferential direction in the plate-shaped axial cross section inclined by.

  The male screw portion 188 of the lid member 184 is inserted into the center hole 196 of the movable member support plate spring 190, and the central mounting portion 192 of the movable member support plate spring 190 is overlapped with the step portion 186 of the lid member 184. . Further, a support nut 210 is screwed to the male screw portion 188 projecting downward from the mover support plate spring 190, so that the central mounting portion 192 has a stepped portion 186 between the support nut 210 and the lid member 184. The support nut 210 is clamped by the screwing fixing force. Further, the upper end surface of the outer peripheral mounting portion 194 of the mover support plate spring 190 is overlapped with the lower end surface of the inner flange-shaped portion 174 of the fourth bracket fitting 166, and a plurality of fixing bolts 212 are connected to the outer peripheral mounting portion 194. The outer peripheral mounting portion 194 is fixed to the fourth bracket fitting 166 by being inserted into each outer peripheral insertion hole 198 and screwed and fixed to the inner flange-shaped portion 174.

  As a result, the mover support plate spring 190 is disposed so as to spread in the direction perpendicular to the axis below the movable member 152 in the axial direction, and the mover support plate spring 190 causes the lower side in the axial direction of the movable member 152 to be third and third. It is elastically connected and supported in the axial direction with respect to the second mounting bracket 14 via the four bracket fittings 164 and 166, and by extension, the first and second bracket fittings 82 and 84.

  Further, since the movable member 152 is connected to the vibration plate 100 via the connecting rod 108, the axially upper side of the movable member 152 extends from the partition member 36 via the vibration plate support plate spring 120. Is elastically supported by the second mounting bracket 14.

That is, as the movable member 152 is displaced axially relative to the yoke member 154 by the action of a magnetic field generated between the movable member 152 and the yoke member 154 by energization of the coil 156, the vibration plate supporting plate spring The connecting rod 108 and the lid member 184 fixed to the movable member 152 are also movable in the axial direction with respect to the yoke member 154 by elastically deforming the 120 and the movable element supporting plate spring 190 in the axial direction. As is apparent from the above description, the output member of the electromagnetic actuator 15 1 of the movable element side is configured to include a connecting rod 108 and the cover member 184. The electromagnetic actuator 15 1 of the housing for fixing the movable member supporting plate spring 190 is configured to include a third bracket fitting 164 a fourth bracket fitting 166.

  Further, the movable member 152 is positioned in the direction perpendicular to the axis by the vibration plate support plate spring 120 and the mover support plate spring 190, so that the movable member 152, the connecting rod 108, and the yoke member 154 are positioned coaxially. Is held. That is, under the non-energized state of the coil 156 as shown in FIG. 1, the initial position of the movable member 152 with respect to the yoke member 154 is maintained based on the rigidity of the vibration plate support plate spring 120 and the mover support plate spring 190. ing. Further, the return of the movable member 152 displaced from the initial position to the initial position is preferably performed by using the elastic deformation action of the vibration plate support plate spring 120 and the mover support plate spring 190, for example.

  The movable member 152 is elastically supported on the stator side including the second mounting bracket 14 and the yoke member 154 via the vibration plate support plate spring 120 and the mover support plate spring 190 so that the movable member 152 is movable. One mass-spring system is configured in which the member 152, the lid member 184, the connecting rod 108, the vibration plate 100, and the like are mass components, and the vibration plate support plate spring 120 and the mover support plate spring 190 are spring components. Yes. In particular, in order to avoid adverse effects such as stiffening of the mass-spring system due to anti-resonance in a higher frequency range than the vibration frequency to be isolated, the natural frequency of this one mass-spring system is The vibration frequency to be vibrated, that is, the vibration frequency of the vibration plate 100 is set to a sufficiently high frequency range.

In assembling the electromagnetic actuator 15 1 is such a structure in the second mounting member 14, the second mounting member 14 side second bracket fitting 84 and the electromagnetic actuator 15 1 side of the third bracket fitting 164 Are superimposed on each other in the axial direction. In addition, the insertion holes provided in the axial direction in the first to fourth bracket fittings 82, 84, 164, 166 in advance are aligned in the direction perpendicular to the axis, in particular, the insertion holes of the second bracket fitting 84. Is a screw hole 214. Fixing bolts 215 and 217 are inserted from both sides in the axial direction of the first bracket fitting 82 and the fourth bracket fitting 166 and are screwed and fixed to the screw holes 214, whereby the first to fourth bracket fittings 82, 84, 164 and 166 are clamped and fixed to each other in the axial direction. As a result, as described above, the main body in which the partition member 36 and the diaphragm 76 are provided with the first and second mounting brackets 12 and 14 based on the bolt fixing in the axial direction of the first bracket fitting 82 and the second bracket fitting 84. together they are fixedly attached to the integrally vulcanization molded component of the rubber elastic body 16, the electromagnetic actuator 15 1, the first to via a fourth bracket fitting 82,84,164,166 second mounting It is assembled to the metal fitting 14.

  Thus, when the movable member 152 is driven and displaced in the axial direction with respect to the yoke member 154 by energization of the coil 156, the axial driving force is transmitted from the connecting rod 108 to the vibration plate 100, and the vibration plate 100. Is driven to vibrate in the axial direction.

  In the engine mount 10 for an automobile having the above-described structure, for example, an engine ignition signal of a power unit is used as a reference signal, and a vibration detection signal of a member to be shaken such as a vehicle body is used as an error signal for adaptive control or the like. By performing feedback control or the like, energization to the coil 156 is controlled to drive the vibration plate 100 to vibrate in the axial direction. As a result, pressure fluctuation is effective between the pressure receiving chamber 90 and the equilibrium chamber 92 when low frequency vibration such as engine shake is input, or when medium frequency vibration such as idling vibration or low-speed booming sound is input. By driving and controlling the vibration plate 100 so that the vibration is generated, the vibration isolation effect based on the resonance action of the fluid through the first orifice passage 98, the resonance action of the fluid through the second orifice passage 146, etc. The anti-vibration effect based on this can be exhibited effectively.

  In the present embodiment, a cushioning rubber layer 216 extending with a substantially constant thickness is provided on the surface of the inner flange-shaped portion 50 of the partition member main body 38 that is positioned opposite to the vibration plate 100. It is formed. As a result, the vibration plate 100 strikes the inner flange-shaped portion 50 via the shock-absorbing rubber layer 216, and the occurrence of hitting sound that becomes a problem due to hitting is suppressed based on the shock-absorbing action of the shock-absorbing rubber layer 216. It is done.

  Further, for example, when a medium speed or high-speed booming sound or the like in a higher frequency range than the tuning frequency range of the first orifice passage 98 or the second orifice passage 146 is input, a driving force corresponding to the vibration is applied. It acts on the vibration plate 100. As a result, the internal pressure of the pressure receiving chamber 90 composed of the first and second pressure receiving chambers 142 and 144 is controlled based on the excitation drive of the excitation plate 100, and is positive or active against the high frequency vibration. The anti-vibration effect can be effectively exhibited.

  In particular, in the present embodiment, the resonance frequency of the fluid that flows through the through holes 62 and 68 of the first and second partition plates 40 and 42 and the circular region 74 will obtain an active vibration isolation effect by the vibration plate 100. In combination with being tuned to a high frequency range such as medium speed to high speed booming noise, the vibration is generated in the first pressure receiving chamber 142 and the second pressure receiving chamber 144 based on the vibration driving of the vibration plate 100. The pressure fluctuation to be squeezed is efficiently transmitted using the resonance action of the fluid squeezed through the through holes 62 and 68 and the circular region 74. Then, the pressure fluctuations of the first pressure receiving chamber 142 and the second pressure receiving chamber 144 are positively or actively controlled, so that the first mounting bracket 12 connected by the main rubber elastic body 16 and the second pressure fitting 12 are connected. The vibration transmission characteristic of the mounting bracket 14 is adjusted, and the intended vibration isolation effect can be advantageously exhibited.

Here, in the electromagnetic actuator 15 1 according to the present embodiment, the drive principle using a magnetic field action of the coil 156 and the yoke member 154, an electromagnetic actuator such as is described in, for example, JP 2007-239883 When the coil 156 is energized, the movable member 152 is displaced in one direction perpendicular to the axis with respect to the yoke member 154, and one place on the circumference of the movable member 152 is brought into contact with the friction sleeve 162. It is driven in the axial direction while being driven. Therefore, the movable member 152 is required to have a certain degree of axial perpendicular displacement.

  Therefore, according to the automotive engine mount 10 of the present embodiment, the vibration plate support that elastically connects and supports both axial sides of the movable member 152 to the stator side including the second mounting bracket 14 and the yoke member 154. In the leaf spring 120 and the mover support leaf spring 190, the central attachment portions 122 and 192 attached to the movable member 152 side and the outer peripheral attachment portions 124 and 194 attached to the stator side are in the drive shaft direction of the movable member 152. A connected structure is formed by connecting arm portions 132 and 202 in the form of inclined strips inclined at a predetermined angle: α. Thereby, while ensuring the material of the supporting plate springs 120 and 190 and the width of the connecting arm portions 132 and 202, the spring rigidity in the axial direction can be reduced while the axial spring component is effectively obtained. As is clear from the above description, one of the connected members to which the central attachment portions 122 and 192 are attached includes the vibration plate 100 and the movable member 152, and the outer peripheral attachment portions 124 and The other connected member to which 194 is attached is configured to include a stator including the second attachment fitting 14 and the yoke member 154.

  As a result, when the coil 156 is energized, the movable member 154 is displaced in one direction perpendicular to the axis with respect to the stator, and is axially linear with respect to the friction sleeve 162 on the stator side at one place on the circumference. While rubbed in a line-by-line manner, it is displaced in the axial direction. Accordingly, since the parallel member 152 is allowed to move in the direction perpendicular to the axis of the parallel axis, vibration displacement accompanied by tilting can be prevented, and swinging-like unstable behavior can also be prevented. It is possible to avoid the occurrence of a larger problem as much as possible.

  Therefore, the vibration drive of the vibration plate 100 is also stabilized, and the desired vibration control is effectively realized. In addition, the possibility that the vibration plate 100 abuts against the peripheral wall portion of the central hole 46 of the partition member 36 is reduced, and the possibility that scratches or the like are generated due to the abutment can be suitably avoided.

  Further, the mover support leaf spring 190 as the leaf spring for the vibration isolator according to the present invention is not applied only to the automobile engine mount 10 as illustrated, but for example, as shown in FIG. It is also possible to use for the vibration damper 220 as 2nd embodiment which concerns on a type | mold damping device. In the following description, members and parts having substantially the same structure as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and detailed descriptions thereof are omitted. .

In this embodiment, a specific example of using the electromagnetic actuator 15 1 according to the first embodiment as damper 220 are the indicated movable member 152 as a movable member in the first embodiment, the stator And a yoke member 154 as a stator in the first embodiment is a yoke member 154 ′ as a mover. Furthermore, in this embodiment, instead of the screw hole 110 provided on the upper side in the axial direction across the flange 116 of the connecting rod 108 in the first embodiment, the male screw portion 222 on the upper side in the axial direction of the connecting rod 108. Is provided. That is, the male screw portion 222 of the connecting rod 108 extends greatly upward in the axial direction from the fixing member 152 ′.

  The male screw portion 222 of the connecting rod 108 is inserted into the insertion hole 226 provided in the vibration suppression target member 224 such as a vehicle body, and the distal end portion of the male screw portion 222 extends from the vibration suppression target member 224. It protrudes outward in the axial direction. In addition, the flange 116 of the connecting rod 108 is overlapped on the surface opposite to the surface from which the tip of the male screw portion 222 protrudes in the vibration suppression target member 224. When the fixing nut 228 is screwed to the distal end portion of the male screw portion 222, the damping target member 224 is clamped and fixed between the fixing nut 228 and the flange portion 116, and the fixing member 152 of the damping device 220 is fixed. 'Is fixed to the vibration suppression target member 224. Further, the yoke member 154 ′ provided with the coil 156 and the third and fourth bracket fittings 164 and 166 is elastically supported by the fixed member 152 ′ and the vibration-damping target member 224 via the mover support plate spring 190. Has been.

  In the vibration damper 220 having the above-described structure, the yoke member 154 ′ is applied to the fixed member 152 ′ by the action of a magnetic field generated between the fixed member 152 ′ and the yoke member 154 ′ by energizing the coil 156. To move in the axial direction. This displacement force is applied as an excitation force from the fixed member 152 ′ to the vibration suppression target member 224, and an active or offset vibration suppression force is applied to the vibration suppression target member 224 based on the excitation force. It is allowed to act.

  Therefore, in the vibration damper 220 according to the present embodiment, the movable element provided with the connecting arm portion 202 having an inclined band plate shape that is inclined with respect to the axial direction as a leaf spring that elastically connects the movable element and the stator. Since the supporting plate spring 190 is employed, the central mounting portion 192 is fixed to the fixing member 152 ′, and the outer peripheral mounting portion 194 is fixed to the yoke member 154 ′, so that it is the same as in the first embodiment. Furthermore, in addition to the reduction of the spring rigidity in the direction perpendicular to the axis and the improvement of the degree of tuning freedom, the degree of freedom of tuning of the spring component in the axis direction can also be improved.

  In particular, in this structure, the driving principle using the magnetic field action of the coil 156 and the yoke member 154 ′ is the same as that of an electromagnetic actuator as described in, for example, Japanese Patent Application Laid-Open No. 2007-239983. As a result of energization, the yoke member 154 ′ is displaced in one direction perpendicular to the axis with respect to the fixing member 152 ′, and one position on the periphery of the friction sleeve 162 of the yoke member 154 ′ is brought into contact with the fixing member 152 ′. , Driven in the axial direction. Here, based on the fact that the spring rigidity in the direction perpendicular to the axis of the mover support plate spring 190 is reduced, parallel displacement in the direction perpendicular to the axis of the yoke member 154 ′ is allowed, so that vibration displacement accompanying tilting is prevented. As a result, swinging-like unstable behavior can also be prevented. Therefore, the excitation drive of the yoke member 154 'is stable, and the intended active vibration isolation effect can be stably obtained.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the specific descriptions in these embodiments, and various changes, modifications, and improvements based on the knowledge of those skilled in the art. Needless to say, any of these embodiments can be included in the scope of the present invention without departing from the spirit of the present invention.

  For example, in the first embodiment, the shape and size of the vibration plate support plate spring 120, the mover support plate spring 190, the first orifice passage 98, the second orifice passage 146, the filter orifice, the movable plate 148, etc. The form such as structure, number, arrangement, etc. is not limited to the form as illustrated. In particular, the first orifice passage 98, the second orifice passage 146, the filter orifice, the movable plate 148, and the like are arranged as necessary, and are not essential components.

  In particular, in the first embodiment, the head of the fixing bolt 118 fixed to the boss-like protrusion 102 of the vibration plate 100 and the guide shaft 150 of the movable plate 148 are opposed to each other with a predetermined distance in the axial direction. ing. Therefore, for example, the vibration plate 100 can be driven upward, the guide shaft 150 can be pressed with the fixing bolt 118, and the movable plate 148 can be held in contact with the first partition plate 40. is there. As a result, the through-hole 62 of the first partition plate 40 is covered with the movable plate 148 and the displacement of the movable plate 148 is constrained, so that the fluid flow action through the second orifice passage 146 is substantially generated. It is possible to prevent clogging, that is, to make the second orifice passage 146 shut off. Therefore, if the second orifice passage 146 is kept in the cutoff state at the time of vibration input in the tuning frequency region of the first orifice passage 98, the pressure leakage through the second orifice passage 146 of the pressure receiving chamber 90 is further increased. Since it can be reliably suppressed, the vibration isolation effect by the first orifice passage 98 can be obtained more effectively.

  Further, for example, by driving and displacing the vibration plate 100 downward, the rim-shaped protrusion 106 of the vibration plate 100 is kept in contact with the inner flange-shaped portion 50 of the partition member main body 38. Between the second pressure receiving chamber 144 and the equilibrium chamber 92, it is also possible to more reliably prevent the fluid flow action through the gap between the vibration plate 100 and the central hole 46. As a result, when the vibration in the tuning frequency range of the second orifice passage 146 is input, the outer peripheral portion (rim-shaped protrusion 106) of the vibration plate 100 is held in contact with the inner flange-shaped portion 50, whereby the second pressure receiving chamber. Since the pressure leakage through the gap 144 is more reliably suppressed, the vibration isolation effect by the second orifice passage 146 can be obtained more effectively.

Further, in the first embodiment, a plate spring or the elastic coupling the oscillating plate 100 and the partition member 36, the electromagnetic actuator 15 1 of the movable element and (movable member 152) of the stator (yoke member 154) elastically connecting As the leaf springs, both of the leaf springs for vibration isolator (the excitation plate supporting leaf spring 120 and the mover supporting leaf spring 190) according to the present invention are employed, but even if only one of these leaf springs is employed. good.

  Further, the connecting arm portions 132 and 202 are not limited to a form having a substantially constant width dimension and a substantially constant inclination angle: α over the entire circumference as illustrated, The width dimension and the angle inclined in the axial direction may change in the circumferential direction.

  In the above embodiment, a pair of connecting arm portions 130 and 202 are provided at equal intervals in the circumferential direction, but three or more connecting arm portions 130 and 202 may be provided at equal intervals in the circumferential direction.

  Moreover, in the said embodiment, although the outer periphery attachment parts 124 and 194 were made into the cyclic | annular outer-periphery board part extended continuously over the perimeter around the outer-periphery edge part of the support leaf | plate springs 120 and 190, for example Instead of extending continuously, the structure may be such that an insertion hole is provided in the radially outer end portion of the connecting arm portion.

  In addition, the electromagnetic actuator employed in the first embodiment has a structure in which a stator (yoke member 154) including a coil 156 is arranged on the outer peripheral side of a movable element (movable member 152) as illustrated, For example, as disclosed in Japanese Patent Application Laid-Open No. 2005-291276 and Japanese Patent Application Laid-Open No. 2000-227137, one of a plurality of permanent magnets and a yoke member is disposed on the movable element side, and a plurality of permanent magnets are disposed on the stator side. By arranging the coil and the other of the yoke member and the coil, the magnetic pole generated by energizing the coil can alternately increase or decrease the N pole and the S pole of the plurality of permanent magnets, thereby moving the mover relative to the stator. It is also possible to adopt a structure that is driven reciprocally.

  In addition, in the above-described embodiments, specific examples of applying the present invention to an automobile engine mount have been described. However, the present invention is not limited to an automobile body mount, a differential mount, or the like, and is also used for vibration isolation of various vibrators other than an automobile. Any of them can be applied to the apparatus.

It is a longitudinal cross-sectional view of the engine mount for motor vehicles as 1st embodiment of this invention, Comprising: The figure equivalent to the II cross section of FIG. The top view of the partition member main body which comprises some engine mounts for the vehicles. The top view of the vibration board support leaf | plate spring which comprises a part of engine mount for the said motor vehicles. IV-IV sectional drawing of FIG. The front view of the same vibration board support leaf | plate spring. The perspective view of the vibration plate support leaf | plate spring. The longitudinal cross-sectional view which shows the state which attached the damping device as 2nd embodiment of this invention to the damping object member.

Explanation of symbols

10: engine mount for automobile, 12: first mounting bracket, 14: second mounting bracket, 16: main rubber elastic body, 100: vibration plate, 120: vibration plate supporting plate spring, 122: central mounting portion 124: outer peripheral mounting portion, 132: connecting arm portion, 152: movable member, 154: yoke member, 190: mover support plate spring, 192: central mounting portion, 194: outer peripheral mounting portion, 202: connecting arm portion

Claims (6)

A central mounting portion to which one connected member is attached and an outer peripheral mounting portion to which the other connected member is attached, and a pair of connected members attached to the central mounting portion and the outer peripheral mounting portion are elastically connected. In the leaf spring for vibration device,
While the central mounting portion and the outer peripheral mounting portion are both flat, the outer peripheral mounting portion is annularly arranged so as to surround the outer peripheral side of the central mounting portion,
A plurality of spiral connecting arm portions extending in the radial direction while being inclined in the circumferential direction from the central mounting portion toward the outer peripheral mounting portion are provided at equal intervals in the circumferential direction,
Each of the connecting arm portions has a spiral shape that gradually increases in curvature radius and spreads smoothly, and has an inclined band plate shape that is inclined in the axial direction, and
The angle of inclination of the inner peripheral side end of each of the connecting arm portions connected to the central mounting portion is gradually reduced and connected to the central mounting portion, and the connecting arms connected to the outer peripheral mounting portion. The inclination angle of the outer peripheral side end of the portion is gradually reduced and connected to the outer peripheral mounting portion, so that the entire length excluding the inner peripheral end and the outer peripheral end extends at a constant inclination angle. A plate spring for an anti-vibration device, wherein the connecting arm portion, the central attachment portion, and the outer peripheral attachment portion are integrally formed.   The leaf spring for an anti-vibration device according to claim 1, wherein a plurality of the connecting arm portions each extend with a length of one or more rounds in the circumferential direction.   The leaf spring for an anti-vibration device according to claim 1, wherein three or more connecting arm portions are provided at equal intervals in the circumferential direction. The first mounting member and the second mounting member are connected by a main rubber elastic body to form a pressure receiving chamber in which a part of the wall is configured by the main rubber elastic body, and an incompressible fluid is formed in the pressure receiving chamber. In the active fluid-filled vibration isolator equipped with an electromagnetic actuator for exciting the vibration plate, another part of the wall of the pressure receiving chamber is constituted by a vibration plate.
The leaf spring for an anti-vibration device according to any one of claims 1 to 3 is employed as a leaf spring that elastically supports an output member driven by energization of the electromagnetic actuator on the second mounting member. The center mounting portion of the vibration isolator leaf spring is attached to the output member, and the outer peripheral attachment portion of the vibration isolator leaf spring is attached to the second attachment member. Type vibration isolator. A mover is mounted so as to be displaceable with respect to the stator. A coil member is assembled to one of the stator and the mover, and the movable member is moved by the action of a magnetic field generated by energizing the coil member. Adopting an electromagnetic actuator that drives the child with respect to the stator, the stator is attached to the vibration suppression target member, and the movable element is attached to the vibration suppression target member via a support plate spring. In an active vibration damping device that is elastically supported by
Wherein the anti-vibration device leaf spring according to any one of claims 1 to 3 is adopted as the supporting plate spring, while the center mounting portion-proof isolation device flexure of the stator and the mover An active type vibration damping device, wherein the outer peripheral mounting portion of the vibration isolator leaf spring is mounted on the other side of the movable element and the stator. A mover is mounted so as to be displaceable with respect to the stator. A coil member is assembled to one of the stator and the mover, and the movable member is moved by the action of a magnetic field generated by energizing the coil member. In an electromagnetic actuator adapted to drive a child relative to the stator,
The leaf spring for a vibration isolator according to any one of claims 1 to 3 is adopted as a leaf spring for elastically connecting the movable element and the stator, and the central mounting portion of the leaf spring for the vibration isolator is used. An electromagnetic actuator, wherein the electromagnetic actuator is attached to one of the mover and the stator, and the outer peripheral attachment portion of the leaf spring for the vibration isolator is attached to the other of the mover and the stator.

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