JP2006055767A - Solenoid type actuator and active type vibration-proofing device using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solenoid type actuator with improved structure generating an exciting force by carrying a current to a coil, stably demonstrating target action characteristics over a long period by reducing partial abrasion of a moving piece. <P>SOLUTION: One axial end part of a connection rod 90 is connected to the moving piece 138 by rod base end side connection means 146, 156, while allowing relative displacement in the orthogonal direction to an axis. An auxiliary guide member 170 externally inserted to the connection rod 90, and having a guide face 172 axially guiding the rod 90, is supported by stators 104, 110. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a solenoid actuator that drives a mover by the action of a magnetic field generated by energization of a coil, and an active vibration isolator using the same, and more particularly to an engine mount, body mount, and vibration damper of an automobile. The present invention relates to a solenoid type actuator suitably employed in a vibration isolator such as the above and an active type vibration isolator using the same.

  Conventionally, as a type of vibration isolator, such as a vibration isolator support body or a vibration isolator connected between members constituting a vibration transmission system, or a vibration control apparatus mounted on a vibration member to be vibrated There is known an active vibration isolator in which vibration to be prevented is positively or counterbalanced by applying an excitation force to a vibration isolation target member or vibration isolator. For example, it is the thing of patent document 1.

  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 described in Patent Document 1 and Patent Document 2 described above, as an anti-vibration actuator employed in an active vibration isolator, generally, a stator in which a yoke member is assembled around a coil. The electromagnetic path using a solenoid that drives the mover in the axial direction by energizing the coil is provided by providing a mover that is driven by the action of the magnetic field generated by energizing the coil. A solenoid actuator of the type is preferably employed.

  Such a solenoid-type actuator is configured such that an output member arranged so as to be displaceable in the axial direction and a mover are connected by a connecting rod so that the output member is driven to vibrate. It is possible to control the generated excitation force to a high degree by controlling the energization.

  By the way, when such a solenoid type actuator is applied to an anti-vibration device as an anti-vibration actuator, for example, the movable element is vibrated and driven in a high frequency range of several tens Hz or more with an amplitude of 1 mm or less. High-precision excitation drive is required. In order to stably realize such high-accuracy excitation drive, a guide mechanism that inserts and arranges a mover into a guide cylinder member having a guide inner surface, and guides the mover in the driving direction by the guide inner surface, Preferably employed.

  Such a guide mechanism ensures stable drive of the mover. However, the inclination of the output member due to component tolerance, assembly error, or temporary inclination during vibration drive, etc., is caused via the connecting rod. There was a risk of tilting the mover when it was exerted on the mover. Since the gap between the mover and the guide cylinder member is very small, a slight tilt of the mover causes a contact state of the mover with respect to the guide cylinder member, and the mover is twisted with respect to the guide cylinder member. There was a risk of sliding.

  Such sliding in the one-piece state increases the contact surface pressure of the contact portion with respect to the guide cylinder member of the mover, and accelerates wear of the contact portion. The surface of the mover has been studied to reduce the frictional resistance of the mover by applying various coatings such as a sliding coating using fluororesin, etc., and a rust prevention coating by plating treatment etc. When such local uneven wear occurs, the coating layer at the contact portion is easily peeled off, and it becomes impossible to maintain the sliding characteristics and the rust prevention characteristics by these coating treatments over a long period of time. In addition, the weight balance of the mover is lost due to uneven wear, and the operation stability of the solenoid may be hindered.

JP-A-9-49541 JP 2004-153063 A

  Here, the present invention has been made in the background as described above, and the problem to be solved is the uneven wear of the mover in the solenoid type actuator that generates the excitation force by energizing the coil. It is an object of the present invention to provide a solenoid-type actuator having an improved structure in which a desired operation characteristic can be stably exhibited over a long period of time.

  The present invention also provides an anti-vibration actuator, an active anti-vibration device, and an active anti-vibration damper having an improved structure, which is configured using such a solenoid-type actuator. Objective.

  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 regarding solenoid type actuator)
That is, the first aspect of the present invention relating to the solenoid type actuator is that a yoke member is assembled around the coil to form a stator having a fixed magnetic path, and a guide member having a cylindrical guide inner surface is provided at the center of the coil. A movable element that is provided in the hole and supported by the yoke member and driven by the magnetic field generated by energizing the coil is inserted into the guide member, and the movable element is energized by energizing the coil. In a solenoid type actuator that causes a driving force exerted on a child to act on an external output target member,
A rod proximal end connecting means for providing a connecting rod extending outward in the axial direction from the mover and positioning the connecting rod in the axial direction while allowing relative displacement in a direction perpendicular to the axis relative to the mover; One end of the connecting rod in the axial direction is connected to the mover so that a driving force is transmitted from the mover to the output target member via the connecting rod, while being externally inserted into the connecting rod. An auxiliary guide member having a guide surface for guiding the connecting rod in the axial direction is provided, and the auxiliary guide member is supported by the stator.

  In the solenoid type actuator structured according to this aspect, the connecting rod can be stably guided in the axial direction by suppressing the inclination of the connecting rod that connects the mover and the output target member by the auxiliary guide member. Then, by suppressing the inclination of the connecting rod, the inclination of the mover connected to the connecting rod can be suppressed, and the partial wear resulting from the one-contact state of the mover with respect to the guide member can be reduced. As a result, for example, it is possible to maintain the characteristics of the various coating agents applied to the mover over a long period of time and obtain the desired vibration isolation characteristics over a long period of time.

  Further, in this aspect, since the relative displacement in the direction perpendicular to the axis between the mover and the connecting rod is allowed by the rod base end side connecting means, the guide member and the auxiliary guide member may be displaced due to component tolerance or assembly error. Even if there is some misalignment between them, this misalignment can be effectively absorbed by the rod proximal end connecting means, and the mover and connecting rod can be stably guided in the axial direction. Is possible.

  In the solenoid-type actuator having the structure according to this aspect, the twist generated in the output target member and the inclination generated in the connecting rod are reduced or cooperated by the rod proximal end connecting means and the auxiliary guide member. It can be solved. Therefore, the mover can be disposed in a state where the inclination with respect to the driving direction is reduced or eliminated, and the connecting rod is also disposed in a state where the inclination with respect to the driving direction is reduced or eliminated. It becomes possible to do.

  In addition, when driving the solenoid type actuator, by stably guiding the connecting rod in the axial direction, not only the movable element can be driven stably in the axial direction, but also the output exerted by the driving force through the connecting rod. The target member can also be driven more stably in the axial direction. As a result, it is possible to obtain the desired vibration isolation characteristics more stably.

  Note that the specific shape and the like of the auxiliary guide member do not necessarily have to be a cylindrical member, and may have an inner peripheral surface shape corresponding to the outer peripheral surface of the connecting rod. Various shapes can be employed according to the shape of the connecting rod guided by the sway, the location of the auxiliary guide member, and the like. Further, since it is preferable that the guide surface of the auxiliary guide member and the connecting rod are slid smoothly, the auxiliary guide member is formed of a low-friction resin material, or the guide surface is made of polytetrafluoroethylene or the like. It is preferable that the low-friction fiber is coated or the guide surface is subjected to a low-friction treatment by laser processing or the like. Furthermore, in order to effectively suppress the inclination of the connecting rod, it is preferable that the auxiliary guide member guides the movable element side from the intermediate portion in the axial direction of the connecting rod.

  In addition, the rod base end side connecting means in this aspect is configured such that the mover and the connecting rod are substantially fixed in position in the axial direction under the action of the axial driving force transmitted from the mover to the connecting rod. On the other hand, in the direction perpendicular to the axis, those that can allow the relative displacement between the mover and the connecting rod as easily as possible are preferably employed. Specifically, for example, by using a biasing means that biases in the axial direction with a biasing force larger than the axial driving force transmitted from the mover to the connecting rod, the mover and the connecting rod are moved on both sides in the axial direction. The movable element and the connecting rod are operated in the direction perpendicular to the axis by the elastic contact with each other and the external force larger than the friction force based on the axial force and the friction coefficient applied by the biasing means in the direction perpendicular to the axis. A configuration in which the relative displacement is allowed is preferably employed.

  In order to transmit the axial driving force of the mover to a predetermined output member to be driven via the connecting rod, the protruding tip portion which is the other axial end of the connecting rod is applied to the output member. Connected etc. For example, the projecting tip portion of the connecting rod is fixed to a predetermined output target member by appropriate connecting means such as welding, adhesion, fitting, bolt fixing, rivet tightening, caulking fixing, or the like. The output target member is integrally formed at the protruding tip portion.

(Aspect 2 of the present invention relating to a solenoid type actuator)
Aspect 2 of the present invention relating to a solenoid type actuator is the solenoid type actuator according to aspect 1, wherein at least one axial end edge portion of the auxiliary guide member expands outward in the axial direction. It is characterized by a chamfering to be diametrically performed. In the solenoid type actuator structured according to this aspect, the operation of inserting the connecting rod into the auxiliary guide member is facilitated.

(Aspect 3 of the present invention relating to a solenoid type actuator)
Aspect 3 of the present invention relating to the solenoid type actuator is the solenoid type actuator according to aspect 1 or 2, wherein an outer diameter of the connecting rod is changed at an intermediate portion in the axial direction, and the axial direction outward from the mover. A large-diameter portion having a larger outer diameter than the one end side in the axial direction of the connecting rod connected to the mover is formed in the protruding portion of the auxiliary guide member. It is characterized by being guided by a guide surface. In the solenoid type actuator structured according to this aspect, the portion guided by the auxiliary guide member has a large diameter, so that it is possible to guide more stably, while other portions are guided. By suppressing the weight as a small diameter, excellent operation response and controllability can be obtained, and energy consumption can be reduced.

(The present invention relating to a vibration-proof actuator)
The present invention relating to a vibration-proof actuator is a vibration-proof actuator that drives an output member spaced apart so as to be reciprocally displaceable in the axial direction in response to vibration to be shaken. A solenoid type actuator according to any one of the above aspects is used, the output member is connected to the mover as the output target member in the solenoid type actuator, and a frequency component corresponding to a target vibration is applied to the coil. The output member is driven to vibrate by applying a driving voltage having the movable member to vibrate and drive the mover in the axial direction.

  In the anti-vibration actuator having the structure according to this aspect, it is possible to reduce the partial wear of the mover and obtain stable operating characteristics over a long period of time based on the above-described effects exhibited by the solenoid actuator. In addition, it is possible to stably drive the output member in the axial direction by driving the connecting rod stably in the axial direction. Such an anti-vibration actuator can be applied to various types of anti-vibration devices such as engine mounts and body mounts for automobiles and active vibration dampers. The drive voltage having a frequency component may be not only alternating current but also pulsating current, and may be not only analog but also digitally controlled.

(The present invention relating to an active vibration isolator)
The present invention relating to an active vibration isolator is characterized in that 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 are made of elastic rubber. While being connected by a body, a part of the wall part 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 part of the pressure receiving chamber is vibrated An active type composed of a 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 anti-vibration device, the anti-vibration actuator is used as the actuator, and a housing for fixedly supporting the stator in a substantially housed state is fixed to the second mounting member, and the vibration member is attached to the anti-vibration member for By connecting to the movable element as the output member of the actuator, in that the the pressurized vibration member in the actuator for vibration-proof so that vibration drive, characterized. In the active vibration isolator having the structure according to the present aspect, based on the above-described effect exhibited by the vibration isolating actuator, the partial wear of the mover is reduced, and stable operating characteristics can be obtained over a long period of time. In addition, it is possible to stably drive the vibrating member in the axial direction by driving the connecting rod in the axial direction.

(The present invention relating to an active vibration isolator)
The present invention relating to a vibration isolator for active vibration isolation is applied to a vibration isolation target member, and applies an excitation force to the vibration isolation target member to exhibit an active vibration suppression effect. A vibration damper, wherein the vibration-proof actuator is used, and an attachment portion for fixing the vibration-proof actuator to one of the stator and the mover is fixed to the vibration-proof target member, and the stator And a mass portion is provided on the other of the movable elements. In the active vibration isolator having the structure according to this aspect, based on the above-described effects exhibited by the vibration isolating actuator, the partial wear of the mover is reduced, and stable operation characteristics are maintained for a long time. In addition to being able to be obtained, it is possible to stably apply an excitation force to the vibration isolation target member by driving the connecting rod stably in the axial direction.

  As is clear from the above description, in the solenoid type actuator structured according to the present invention, the movable element and the connecting rod are connected in a state in which relative displacement in the direction perpendicular to the axis is possible by the rod proximal end connecting means, By guiding the connecting rod in the axial direction by the auxiliary guide member, the inclination of the mover can be suppressed. As a result, uneven wear resulting from the contact of the movable element with the guide member can be reduced, and the intended operating characteristics can be stably obtained over a long period of time.

  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 an active vibration isolator as an embodiment of the present invention. The engine mount 10 includes a first mounting member 12 as a first mounting member and a second mounting member 14 as a second mounting member that are spaced apart from each other and disposed therebetween. A mount main body 18 elastically connected by the interposed main rubber elastic body 16 is configured to be fitted into a stopper fitting 20. In the engine mount 10, the first mounting bracket 12 is attached to a power unit (not shown), while the second mounting bracket 14 is attached to an automobile body (not shown) so that the power unit is supported by vibration isolation against the body. It has become. Further, under such a mounted state, the engine mount 10 has a shared load of the power unit between the first mounting bracket 12 and the second mounting bracket 14 in the mount center axis direction which is the vertical direction in FIG. As a result, the main rubber elastic body 16 is elastically deformed in the direction in which the first mounting bracket 12 and the second mounting bracket 14 approach each other. Further, the main vibration to be vibration-proofed is input between the first mounting bracket 12 and the second mounting bracket 14 in a direction in which the mounting brackets 12 and 14 approach / separate each other. ing. In the following explanation, the vertical direction means the vertical direction in FIG. 1 in principle.

  More specifically, the first mounting member 12 has a truncated conical shape. Further, an annular plate-like stopper portion 22 protruding on the outer peripheral surface is integrally formed at the large-diameter side end portion of the first mounting member 12. Further, a fixed shaft 24 is integrally projected from the end portion on the large diameter side toward the upper side in the axial direction, and a fixing screw hole 26 that opens to the upper end surface is formed in the fixed shaft 24. The first mounting bracket 12 is attached to a power unit of an automobile (not shown) by a fixing bolt (not shown) screwed into the fixing screw hole 26.

  On the other hand, the second mounting bracket 14 has a large-diameter, generally cylindrical shape. In addition, a step portion 28 is formed at an axially intermediate portion of the second mounting bracket 14, and the upper side in the axial direction is a large diameter portion 30 across the step portion 28, while the lower side in the axial direction is The small diameter portion 32 is used. Note that a thin seal rubber layer 34 is formed on the inner peripheral surface of the large diameter portion 30. Further, a diaphragm 36 made of a thin rubber film as a flexible film is disposed in the vicinity of the lower opening end of the small-diameter portion 32, and the outer peripheral edge of the diaphragm 36 is the second mounting bracket 14. By being vulcanized and bonded to the inner peripheral surface of the small-diameter portion 32, the lower opening in the axial direction of the second mounting bracket 14 is covered with a fluid-tight cover. Further, a connecting metal fitting 38 is vulcanized and bonded to the central portion of the diaphragm 36.

  The first mounting bracket 12 is positioned so as to be spaced apart upward in the axial direction of the second mounting bracket 14, and the first mounting bracket 12 and the second mounting bracket 14 are made of a main rubber elastic body. 16 is elastically connected.

  The main rubber elastic body 16 has a substantially truncated cone shape as a whole, and a mortar-shaped concave surface 40 is formed on the end surface on the large diameter side. The first mounting bracket 12 is vulcanized and bonded to the end surface on the small diameter side of the main rubber elastic body 16 in a state of being inserted in the axial direction. The stopper portion 22 of the first mounting bracket 12 is superimposed on the end surface on the small diameter side of the main rubber elastic body 16 and is vulcanized and bonded so as to be covered with the main rubber elastic body 16. The contact rubber 42 protruding upward from the main rubber elastic body 16 is formed integrally with the main rubber elastic body 16, and a concave groove 44 is formed inside the contact rubber 42. A connecting sleeve 46 is vulcanized and bonded to the outer peripheral surface of the main rubber elastic body 16 on the large diameter side.

  The connecting sleeve 46 vulcanized and bonded to the large-diameter outer peripheral surface of the main rubber elastic body 16 is fitted into the large-diameter portion 30 of the second mounting bracket 14 so that the large-diameter portion 30 is reduced in diameter. Thus, the main rubber elastic body 16 is fluidly fitted and fixed to the second mounting bracket 14. As a result, the axially upper opening of the second mounting bracket 14 is covered fluid-tightly by the main rubber elastic body 16, so that the main rubber elastic body is placed inside the second mounting metal 14. A liquid chamber 48 is formed between the opposing surfaces of the diaphragm 16 and the diaphragm 36 as a sealed region that is fluid-tightly blocked from the external space, and an incompressible fluid is sealed in the liquid chamber 48.

  As the incompressible fluid to be enclosed, for example, water, alkylene glycol, polyalkylene glycol, silicone oil or the like can be used, and in particular, to effectively obtain a vibration isolation effect based on the resonance action of the fluid. And a viscosity of 0.1 Pa. A low-viscosity fluid of s or less is preferably employed.

  Further, a partition member 50 and an orifice member 52 are incorporated in the second mounting member 14 and are disposed between the opposing surfaces of the main rubber elastic body 16 and the diaphragm 36.

  The partition member 50 has a support rubber elastic body 54 that spreads with a predetermined thickness, and a vibration plate 56 as a vibration member is vulcanized and bonded to a central portion of the support rubber elastic body 54. The vibration plate 56 has a shallow substantially inverted cup shape, and the outer peripheral edge portion thereof is vulcanized and bonded to the inner peripheral edge portion of the support rubber elastic body 54. In addition, on the upper part of the vibration plate 56, a buffer portion 58 is formed in which the support rubber elastic body 54 wraps around and becomes thick.

  Further, an annular outer peripheral metal fitting 60 is vulcanized and bonded to the outer peripheral edge of the support rubber elastic body 54, and a peripheral groove 62 extending in a circumferential direction with a predetermined length is formed on the outer peripheral metal fitting 60. ing. And the axial direction upper side opening part of this outer periphery metal fitting 60 is made into the flange-like part 64 which spreads to radial direction outward, the flange-like part 64 is overlapped with the step part 28 of the 2nd attachment metal fitting 14, and a step part 28 and the connecting sleeve 46 are clamped and fixed. As a result, the partition member 50 is disposed so as to extend in the direction perpendicular to the axis at an intermediate portion between the opposing surfaces of the main rubber elastic body 16 and the diaphragm 36, and the interior of the second mounting bracket 14 is divided into two sides in the axial direction. I'm coughing. Therefore, on the upper side across the partition member 50, a vibration action in which a part of the wall portion is constituted by the main rubber elastic body 16 and pressure fluctuations are generated due to elastic deformation of the main rubber elastic body 16 at the time of vibration input. A working fluid chamber 66 is formed as a chamber. On the other hand, on the lower side of the partition member 50, an equilibrium chamber 68 is formed in which a part of the wall portion is constituted by the diaphragm 36 and volume change is easily allowed.

  In addition, the orifice member 52 is configured by overlapping the upper and lower thin plates 53 a and 53 b with each other, and the outer peripheral edge portion thereof is overlapped with the flange-like portion 64 of the outer peripheral metal fitting 60. By being sandwiched between the inner peripheral edge of the large-diameter side end of the main rubber elastic body 16, it is fixedly supported by the second mounting bracket 14 via the outer peripheral bracket 60. As a result, the orifice member 52 is disposed so as to extend in the direction perpendicular to the axis at the intermediate portion between the opposing surfaces of the main rubber elastic body 16 and the partition member 50, and the working fluid chamber 66 is divided into two sides in the axial direction. Yes. Therefore, a pressure receiving chamber 70 in which a part of the wall portion is formed of the main rubber elastic body 16 is formed above the orifice member 52. On the other hand, on the lower side of the orifice member 52, a vibration chamber 72 having a wall portion partially constituted by a vibration plate 56 is formed.

  Further, a circumferential passage 74 extending continuously in the circumferential direction between the overlapping surfaces of the upper and lower thin plates 53a and 53b is formed in the outer peripheral edge portion of the orifice member 52. One end of the circumferential passage 74 is connected to the pressure receiving chamber 70, and the other end is connected to the excitation chamber 72. Thus, a first orifice passage 76 that allows the pressure receiving chamber 70 and the vibration chamber 72 to communicate with each other is formed. The first orifice passage 76 is tuned to a medium frequency range such as idling vibration of about 30 to 40 Hz.

  Furthermore, the outer peripheral edge portion of the orifice member 52 is overlapped with the outer peripheral edge portion of the partition member 50, and the second orifice is formed by covering the peripheral groove 62 formed in the outer peripheral edge portion of the outer peripheral metal fitting 60. A passage 78 is formed. The second orifice passage 78 has one end connected to the pressure receiving chamber 70 through the vibration chamber 72 and the first orifice passage 76, and the other end connected to the equilibrium chamber 68. As a result, a second orifice passage 78 that allows the pressure receiving chamber 70 and the equilibrium chamber 68 to communicate with each other is formed. The second orifice passage 78 is tuned to a low frequency region such as an engine shake of about 10 Hz.

  The specific form and tuning of the orifice passage are not limited in any way. In addition to the above-described aspects, for example, the pressure receiving chamber 70 and the excitation chamber 72 are directly passed through the central portion of the orifice member 52. A first orifice passage in the form of a through-hole to be communicated is formed, and the first orifice passage is tuned to a high frequency region such as a booming sound of about 50 to 150 Hz, while the circumferential passage 74 and the outer periphery of the orifice member 52 The second orifice passage may be formed by directly connecting the peripheral grooves 62 of the metal fitting 60 in series.

  Further, the mount body 18 having the above-described structure has the second mounting bracket 14 fitted into the stopper bracket 20 and is attached to the body of the automobile (not shown) via the stopper bracket 20. Yes.

  The stopper metal fitting 20 has a large-diameter stepped cylindrical shape, the lower side of which has a larger diameter than the upper side, and the mount main body 18 is inserted from the lower side opening so that the locking step 80 It is locked by press fitting. On the other hand, a contact portion 82 extending inward is formed in the upper opening, and the stopper portion 22 of the first mounting bracket 12 contacts the contact portion 82 via a contact rubber 42. The stopper function in the rebound direction is exhibited. An insertion hole 84 is provided in the contact portion 82 so that an appropriate gap is maintained between the first mounting bracket 12 and the fixed shaft 24, and the first mounting bracket 12 is perpendicular to the axis. Relative displacement is allowed. In addition, a collar member 86 on the umbrella that extends so as to cover the insertion hole 84 of the stopper fitting 20 is attached to the fixed shaft 24 of the first attachment fitting 12.

  The second mounting bracket 14 fitted in the stopper fitting 20 is locked by the locking step portion 80 of the stopper fitting 20 and is press-fitted and fixed so that it cannot be pulled out. Further, a plurality of leg portions 88 projecting on the outer peripheral surface and extending downward are fixed to the stopper fitting 20, and these leg portions 88 are placed on a body of an automobile (not shown) and fixed with fixing bolts. As a result, the engine mount 10 is mounted on the body of the automobile.

  Further, in the mount body 18, the vibration plate 56 provided on the partition member 50 is overlapped and fixed in close contact with the connection fitting 38 provided on the diaphragm 36. A drive rod 90 as a connecting rod is fixed to the vibration plate 56 and the connection fitting 38, and the drive rod 90 is protruded downward in the axial direction from the vibration plate 56 and the connection fitting 38.

  Note that the connecting metal 38 is provided with a sandwich rubber layer 92 formed integrally with the diaphragm 36 over substantially the entire circumference, so that the space between the overlapping surface with the vibration plate 56 is fluid. It is tightly sealed. In addition, the vibration plate 56 and the coupling fitting 38 are overlapped at each upper bottom portion in the center, and the caulking portion as a rod tip side coupling means formed integrally with the upper end portion of the drive rod 90 in the central portion. 94 is inserted. The vibration plate 56 and the coupling fitting 38 are caulked and fixed in close contact by the caulking portion 94, and the drive rod 90 penetrates the coupling fitting 38 from the vibration plate 56 and extends outward in the axial direction. The vibration plate 56 and the coupling fitting 38 are integrated with each other, and a recess 96 that opens toward an armature 138 described later is formed. Further, in the vicinity of the peripheral wall portion 98 of the recess 96, a buffer rubber portion 100 is integrally formed with the diaphragm 36 so as to cover the peripheral wall portion 98.

  Further, an axially lower side of the second mounting bracket 14 from which the drive rod 90 is projected, that is, on the side opposite to the working fluid chamber 66 with the vibration plate 56 and the coupling bracket 38 interposed therebetween, is a vibration-proof actuator. An electromagnetic vibrator 102 is disposed and supported by the second mounting bracket 14.

  The electromagnetic vibrator 102 includes a coil 104 and a housing 106 fixedly assembled to the coil 104 so as to surround the coil 104. The housing 106 is provided with an upper through hole 108 penetrating in the upper central portion in the axial direction, and a lower through hole 109 having substantially the same diameter as the upper through hole 108 in the lower central portion in the axial direction. At the same time, a yoke member 110 made of a ferromagnetic material is formed so as to surround the outer peripheral surface of the coil 104 and both upper and lower end surfaces, and to extend over the entire circumference in a U-shaped cross section. The coil 104 and the yoke member 110 constitute a stator in which a fixed-side magnetic path is formed when the coil is energized, and the stator and an armature 138 as a mover described later constitute a solenoid actuator. . In particular, in this embodiment, a part of the yoke member 110 constituting a part of the stator is the housing 106 without providing a separate independent member as the housing 106.

  More specifically, the coil 104 is provided so that a cover member 114 made of a nonmagnetic material covers the outer periphery of the coil 104 with respect to the coil 104 wound around the bobbin 112 made of a nonmagnetic material. For example, the cover member 114 is resin-molded after the coil 104 is wound around the bobbin 112. Further, the cover member 114 is integrally formed with a power supply port 116 that protrudes to the outside from an opening formed in the housing 106, and power is supplied to the coil 104 through a terminal provided inside the power supply port 116. It comes to be supplied.

  On the other hand, the yoke member 110 includes an upper yoke 118 disposed so as to cover the upper portion of the coil 104, and a lower yoke 120 extending in an L-shaped cross section so as to surround the outer peripheral surface and the lower end surface of the coil 104. It is composed of The coil 104 is disposed so as to cover the coil 104 with the outer peripheral end of the upper yoke 118 and the upper end of the lower yoke 120 in contact with each other, and the coil 104 is energized by the upper yoke 118 and the lower yoke 120. A fixed-side magnetic path through which magnetic flux flows is formed, and the upper magnetic pole as a magnetic pole forming portion where the inner peripheral edge of each of the upper through-hole 108 and the lower through-hole 109 forms a magnetic pole when the coil 120 is energized. 122 and the lower magnetic pole 124.

  A guide sleeve 126 as a guide member is assembled in the center hole of the coil 104 so as to cover the openings at the upper and lower inner peripheral edge portions formed by the upper yoke 118 and the lower yoke 120. . The guide sleeve 126 has a cylindrical shape having a cylindrical guide surface 128 as a smooth guide inner surface with an inner diameter that slightly protrudes from the magnetic pole inner surfaces of the upper yoke 118 and the lower yoke 120. For example, polyethylene or polytetrafluoroethylene is used. It is made of a low friction material such as Further, in order to reduce rubbing with an armature 138, which will be described later, a chamfering process is performed on the both ends in the axial direction of the cylindrical guide surface 128 of the guide sleeve 126 to increase the diameter outward in the axial direction. In particular, the upper edge portion in the present embodiment is subjected to a diameter expansion process slightly from the inside.

  On the other hand, an engagement groove 130 is formed on the outer peripheral edge of the housing 106, and a locking piece 132 formed on the lower edge of the second mounting member 14 is fitted into the engagement groove 130. Thus, the electromagnetic exciter 102 is attached so as to cover the lower end opening of the second mounting member 14. Thus, in this embodiment, since the electromagnetic exciter 102 is directly fixed to the second mounting member 14 without using a separate member such as a bracket, the vibration plate 56 and the coil 104 are used. The positional deviation when assembled with the center axis of the is reduced. In addition, between the housing 106 of the electromagnetic exciter 102 and the second mounting bracket 14, a pressing rubber 134 formed by a diaphragm 36 extending downward is sandwiched, so that the electromagnetic excitation is performed. The backlash of the vessel 102 is prevented. As a result, the central axis of the coil 104 is substantially aligned with the central axis of the mount body 18 and is aligned with the central axes of the second mounting bracket 14 and the vibration plate 56. Further, a lid member 136 is bolted below the housing 106 to prevent dust and the like from entering the lower through hole 109 of the housing 106.

  An armature 138 as a mover is assembled in the upper and lower through holes 108 and 109 of the housing 106 in which the coil 104 is assembled. The armature 138 is formed of a substantially circular block-shaped ferromagnetic body as a whole, has an outer diameter slightly smaller than the inner diameter of the guide sleeve 126, is inserted into the guide sleeve 126, and is substantially the same as the coil 104. It is assembled so as to be capable of relative displacement in the axial direction on the central axis.

  More specifically, the armature 138 has an axial length dimension extending over the upper and lower magnetic poles 122 and 124, and a circumferential groove 140 that opens on the outer peripheral surface is formed near the upper magnetic pole 122. The upper part of the circumferential groove 140 and the lower end edge of the armature 138 are magnetic force action portions to which the action of magnetic force generated by energization of the coil 104 is exerted. For example, as shown, between the upper end edge of the circumferential groove 140 of the armature 138 and the upper magnetic pole 122 of the upper yoke 118, and the lower axial end edge of the armature 138 and the lower magnetic pole 124 of the lower yoke 120, In between, the magnetic gap to which each effective magnetic attraction force is applied is adjusted in position.

  Further, the outer peripheral surface of the armature 138 is subjected to low friction treatment and rust prevention treatment with various known coating agents. Further, both end portions in the axial direction of the armature 138 are chamfered over the entire circumference, and wear due to rubbing against the guide sleeve 126, generation of abnormal noise, and the like are reduced. A cushioning rubber 142 is provided at a portion of the lid member 136 that faces the lower end surface of the armature 138, and the armature 138 abuts against the lid member 136 in a shock-absorbing manner, reducing the hitting sound and providing durability. It has been improved.

  Further, the armature 138 is formed with an insertion hole 144 as a through hole penetrating the central axis. An engagement protrusion 146 as an inwardly protruding connecting portion is formed slightly above the axial center portion of the insertion hole 144, and the upper side in the axial direction with the engagement protrusion 146 is small in diameter. The lower portion in the axial direction is the large-diameter portion 150.

  The drive rod 90 is inserted into the insertion hole 144 of the armature 138 from above in a loosely inserted state with a gap, and the lower end of the drive rod 90 protrudes downward from the engagement protrusion 146 of the armature 138. It has been. As shown in FIG. 2, the drive rod 90 has a large diameter portion 164 above the step surface 154 formed at the substantially central portion in the axial direction, and a small diameter portion 165 below the step surface 154. The distal end portion of the armature 138 is inserted into the insertion hole 144 of the armature 138 and protrudes downward from the engagement protrusion 146. Further, a coil spring 152 is extrapolated to the drive rod 90 and is disposed across the stepped surface 154 of the drive rod 90 and the opposing surface of the engaging projection 146 of the armature 138. A rod-shaped positioning nut 156 having an outer diameter larger than the inner diameter of the engaging protrusion 146 is screwed to a tip portion protruding from the 90 engaging protrusion 146. Then, the positioning nut 156 is screwed into the drive rod 90, and the coil spring 152 is compressed between the stepped surface 154 of the drive rod 90 via the engaging projection 146 of the armature 138, so that the armature 138 is positioned in the positioning nut 156. Are held in contact with each other and fixedly positioned in the axial direction. Thus, the drive rod 90 and the armature 138 are connected in a substantially fixed state in the axial direction by the urging force of the coil spring 152, and the drive force applied to the armature 138 by energizing the coil 104 is applied to the drive rod 90. It has come to be affected. The armature 138 and the vibration plate 56 are connected via the drive rod 90, so that the vibration plate 56 is an output target member of the electromagnetic vibration device 102 serving as a vibration-proof actuator.

  A concave groove 157 that extends in the radial direction and opens to the outer peripheral edge is formed on the upper end surface of the positioning nut 156. As a result, the upper and lower spaces of the armature 138 communicate with each other, and the upper and lower spaces of the armature 138 are prevented from affecting the driving of the armature 138 as an air spring.

  In addition, collar members 158 are attached to both ends of the coil spring 152 in the present embodiment to reduce wear due to friction between the coil spring 152 and other members. Further, the coil spring 152 is preferably processed so as to reduce the generation of dust due to rubbing with the collar member 158 attached to both ends in the axial direction. Therefore, the coil spring 152 has a closed end rather than an open end. An end structure is desirable, and a structure that has been subjected to grinding or taper end processing is preferably employed rather than non-grinding.

  On the other hand, the axial direction of the outer peripheral edge of the collar member 158, the positioning nut 156, and the drive rod 90, which is crowned by the coil spring 152 and brought into contact with the engaging protrusion 146, and the inner peripheral surface of the armature 138 A slight gap is formed between the opposing surfaces. Then, by adjusting the tightening force of the armature 138 to the positioning nut 156 by the coil spring 152, the external force in the axial direction exceeding the static frictional force generated between the positioning nut 156 and the collar member 158 and the engaging projection 146. Is applied to the armature 138, the relative sliding displacement of the armature 138 in the direction perpendicular to the axis with respect to the drive rod 90 is allowed. The positioning nut 156, the coil spring 152, the engaging protrusion 146 constitutes rod base end side coupling means for coupling the armature 138 and the drive rod 90 so as to allow relative displacement in the direction perpendicular to the axis. Thereby, the relative displacement between the drive rod 90 and the armature 138 due to a dimensional error in manufacturing of each member, a positioning error at the time of assembly, or the like can be advantageously absorbed, and the armature 138 is incorporated into the coil 104. On the other hand, positioning can be performed stably 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.

  The relative displacement in the axial direction of the armature 138 with respect to the drive rod 90 is the distance between the axially opposed surfaces of the outer peripheral edge of the drive rod 90, the collar member 158 or the positioning nut 156 and the inner peripheral surface of the armature 138. Although it is defined by the distance, a range of 0.2 mm to 3 mm is suitably employed as the allowable amount of relative displacement in the direction perpendicular to the axis. Further, in order to better realize the sliding displacement of the armature 138, for example, a sliding member made of a low friction material such as polyethylene or polytetrafluoroethylene is incorporated into these sliding surfaces, or a low friction treatment is performed. May be.

  Furthermore, in this embodiment, the vibration plate 56 elastically positioned and supported by the support rubber elastic body 54 with respect to the second mounting bracket 14 by adjusting the screwing amount of the positioning nut 156 into the drive rod 90. On the other hand, the mounting position of the armature 138 can be changed and set in the axial direction. Thereby, it is possible to finely adjust the distance between the opposing surfaces of the armature 138 with respect to the upper and lower yokes 118 and 120. In the present embodiment, the lock bolt 160 is tightened from the lower side in the axial direction with respect to the positioning nut 156, and the lock bolt 160 is brought into contact with the tip of the drive rod 90 in the screw hole of the positioning nut 156. As a result, the tightening position of the positioning nut 156 relative to the drive rod 90 is locked.

  In addition, since a lower through hole 109 is provided at the center of the bottom wall portion of the housing 106 of the electromagnetic vibrator 102, the electromagnetic vibrator 102 in which the armature 138 is disposed through the lower through hole 109. The internal space of the can be directly opened to the outside. Then, by inserting a tool such as a hexagon wrench into the opening of the lower through hole 109 of the housing 106 through the opening, the position of the armature 138 is adjusted from the outside by operating the lock bolt 160 and the positioning nut 156. You can do that.

  On the other hand, a support member 162 is disposed above the electromagnetic vibrator 102 so as to cover the upper through hole 108. The support member 162 is made of a nonmagnetic material, and has a substantially gate-like cross-sectional shape that extends from the central portion of the upper yoke 118 to the large-diameter portion 164 of the drive rod 90. As a result, the support member 162 is spaced above the armature 138 so that the upward displacement of the armature 138 is not hindered. As shown in FIG. 2, a thick portion 166 extending slightly upward is formed in the central portion of the support member 162, and a rod insertion hole 168 is provided through the central portion of the thick portion 166. Yes. The large-diameter portion 164 of the drive rod 90 is inserted into the rod insertion hole 168 in a loosely inserted state.

  Further, a rod guide sleeve 170 as an auxiliary guide member is disposed coaxially with the rod insertion hole 168 in the thick portion 166. The rod guide sleeve 170 has substantially the same structure as the guide sleeve 126 described above, and has a cylindrical shape having a rod guide surface 172 as a smooth guide surface having an inner diameter slightly smaller than the inner diameter of the rod insertion hole 168. For example, it is made of a non-magnetic low friction material such as polyethylene or polytetrafluoroethylene. Further, the rod guide sleeve 170 is also chamfered to increase the diameter outward in the axial direction at both ends in the axial direction in order to reduce rubbing with the drive rod 90 and the like. The drive rod 90 is inserted into the rod guide sleeve 170 with a slight gap over the entire circumference, and the upper space of the electromagnetic exciter 102 communicates with the internal space, so that the space above the armature 138 is communicated. The sealing is avoided.

  As a result, the rod guide sleeve 170 is spaced above the guide sleeve 126 and fixedly disposed with respect to the upper yoke 118. The rod guide sleeve 170 and the guide sleeve 126 are disposed coaxially. Yes. The armature 138 is guided in the axial direction by the guide sleeve 126, and the drive rod 90 is guided in the axial direction by the rod guide sleeve 170.

  Although not shown, the engine mount 10 having the structure as described above can control the energization of the coil 104. For example, the engine ignition signal of the power unit is used as a reference signal and vibration is prevented. The energization control can be performed by performing feedback control such as adaptive control using the vibration detection signal of the power member as an error signal, or by using map control based on preset control data. As a result, a magnetic force is applied to the armature 138 to vibrate it downward in the axial direction, and the energization of the coil 104 is stopped and the restoring force of the support rubber elastic body 54 is applied to the vibration plate 56. Thus, a driving force corresponding to the vibration to be vibrated can be applied, so that an active vibration isolating effect by controlling the internal pressure of the working fluid chamber 66 can be obtained.

  Therefore, in the engine mount 10 of the present embodiment, since the drive rod 90 is guided in the axial direction by the rod guide sleeve 170, it is caused by component tolerance, assembly error, irregular elastic deformation of the support rubber elastic body 54, and the like. The inclination of the armature 138 is suppressed by effectively suppressing the tilt of the drive rod 90 that occurs. As a result, uneven wear due to rubbing of the armature 138 with the guide sleeve 126 can be reduced, and sliding characteristics and rust prevention characteristics due to the coating process applied to the armature 138 can be maintained for a long period of time.

  Further, since the armature 138 and the drive rod 90 are connected to each other so as to be capable of relative displacement in the axial direction by the rod proximal end connecting means including the positioning nut 156, even if the drive rod 90 is inclined. Thus, the rod base end side connecting means can effectively absorb, and the rod base end side connecting means suppresses the inclination of the armature 138 more effectively. In addition, since the armature 138 and the drive rod 90 can be displaced relative to each other in the axial direction, a relative displacement occurs between the guide sleeve 126 and the rod guide sleeve 170 due to component tolerances and assembly errors. Even in such a case, the positional deviation is absorbed by the relative displacement between the armature 138 and the drive rod 90, and the shaft can be driven stably in the axial direction.

  In addition, since the drive rod 90 is stably driven in the axial direction by the rod guide sleeve 170, the armature 138 is not only stably driven in the axial direction but also the vibration of the vibration plate 56 connected to the opposite side thereof. It is also possible to drive stably. As a result, it is also possible to exhibit the intended anti-vibration effect more stably.

  In short, in the engine mount 10 having the above-described structure, not only the armature 138 but also the drive rod 90 is guided in the axial direction by the guide sleeve 126 and the rod guide sleeve 170, so that the armature 138 and the tilt of the drive rod 90 are tilted. Is suppressed, and the axial driving force is stably and efficiently applied to the vibration plate 56. Further, even if the guide sleeve 126 and the rod guide sleeve 170 are slightly decentered to the extent of manufacturing error or assembly error, relative displacement in the direction perpendicular to the axis is allowed at the connecting portion of the drive rod 90 and the armature 138. Therefore, the drive rod 90 and the armature 138 are guided in the axial direction without being inclined.

  As mentioned above, although embodiment of this invention was explained in full detail, this is an illustration to the last, Comprising: This invention is not interpreted limitedly by the specific description in this embodiment.

  For example, the specific shape of the rod guide sleeve 170 is not limited in any way, and may be formed not only in a cylindrical shape but also in a cross-sectional shape such as an ellipse or a rectangle in accordance with the cross-sectional shape of the drive rod 90. . Further, the rod guide sleeve 170 is not limited to a simple cylindrical member, and a mechanism such as a ball bearing can be used. Furthermore, the rod guide sleeve 170 may be integrally formed with the support member 162 by appropriately selecting the material of the support member 162 or performing an appropriate surface treatment as necessary.

  Further, the specific shapes of the armature 138 and the upper and lower yokes 118 and 120 in the electromagnetic exciter 102 are not limited at all. For example, the lower end portion of the lower yoke 120 in the above-described embodiment extends further inward. Then, a magnetic gap may be formed between the lower end portion of the armature 138 by forming a magnetic pole in the inwardly extending portion.

  Further, the specific aspect of the rod base end side coupling means that allows the relative displacement in the axial direction between the armature 138 and the drive rod 90 is not limited to the above-described aspect. For example, the coil spring 152 in the above embodiment is not necessarily required, and a rubber elastic body may be used instead of a metal spring such as the coil spring 152. Further, instead of the positioning nut 156, an annular locking member having an outer diameter larger than the inner diameter of the engaging projection 146 of the armature 138 is bolted to the projecting tip of the drive rod 90 from the engaging projection 146. By fixing, the armature 138 may be locked so as not to come out of the drive rod 90.

  In addition, the present invention relates to an anti-vibration device such as a body mount or member mount for automobiles, or a mount or a vibration damper in various devices other than automobiles, and an anti-vibration actuator used for such anti-vibration devices. On the other hand, the same applies.

  For example, as an active vibration damper to which the present invention is applied, specifically, for example, a mounting portion made of a metal plate or the like on the opening side of the housing 106 in the electromagnetic vibrator 102 shown in the above-described embodiment. The vibration plate is elastically connected, and the vibration plate and the armature 138 are connected, while the vibration plate is fixedly attached to a vibration member to be controlled as an attachment portion, and the coil 104 is attached. The housing 106 including the coil 104 can be elastically coupled and supported to the vibration member, so that the housing 106 including the coil 104 can act as a mass that is actively excited to the vibration member by energizing the coil 104. It is.

  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 one embodiment of the present invention. It is a principal part enlarged view of the engine mount shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Engine mount 12 1st mounting bracket 14 2nd mounting bracket 16 Main body rubber elastic body 56 Excitation board 68 Equilibrium chamber 70 Pressure receiving chamber 72 Excitation chamber 90 Drive rod 102 Electromagnetic exciter 104 Coil 118 Upper yoke 120 Lower yoke 126 Guide sleeve 138 Armature 162 Support member 170 Rod guide sleeve

Claims (6)

A yoke member is assembled around the coil to form a stator having a fixed-side magnetic path, and a guide member having a cylindrical guide inner surface is provided in the central hole of the coil and supported by the yoke member. A movable element exerted with a driving force by the action of a magnetic field generated by energization of the coil is inserted into the guide member, and the driving force exerted on the movable element by the energization of the coil is applied to an external output target member. In the solenoid type actuator that is made to act,
A rod proximal end connecting means for providing a connecting rod extending outward in the axial direction from the mover and positioning the connecting rod in the axial direction while allowing relative displacement in a direction perpendicular to the axis relative to the mover; One end of the connecting rod in the axial direction is connected to the mover so that a driving force is transmitted from the mover to the output target member via the connecting rod, while being externally inserted into the connecting rod. A solenoid type actuator characterized in that an auxiliary guide member having a guide surface for guiding the connecting rod in the axial direction is provided, and the auxiliary guide member is supported by the stator.   2. The solenoid actuator according to claim 1, wherein at least one axial end edge portion of the guide surface of the auxiliary guide member is chamfered to increase in diameter toward the outside in the axial direction.   One end side of the connecting rod in the axial direction of the connecting rod connected to the mover at a portion where the outer diameter dimension of the connecting rod is changed at an intermediate portion in the axial direction and protruded outward in the axial direction from the mover The solenoid actuator according to claim 1 or 2, wherein a large-diameter portion having a larger outer diameter is formed, and the large-diameter portion is guided by the guide surface of the auxiliary guide member. An anti-vibration actuator that drives the output member, which is spaced apart so as to be reciprocally displaceable in the axial direction, to vibrate in response to vibration to be vibrated,
The solenoid type actuator according to any one of claims 1 to 3, wherein the output member is connected to the mover as the output target member in the solenoid type actuator, and corresponds to a target vibration with respect to the coil. An anti-vibration actuator, wherein the output member is driven to vibrate by applying a driving voltage having a frequency component to drive the mover in the axial direction. 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 isolator provided with an actuator that exerts an excitation force and actively controlling the pressure of the pressure receiving chamber by driving the excitation member with the actuator.
The vibration isolating actuator according to claim 4 is used as the actuator, and a housing for fixedly supporting the stator in a substantially housed state is fixed to the second mounting member, while the vibration exciting member is fixed to the vibration isolating member. An active type vibration isolating apparatus, wherein the vibration isolation actuator is driven to vibrate by being coupled to the movable element as the output member of the actuator for a motor. An active type vibration damping device that exerts an exciting force on the vibration isolation target member to exert an active vibration suppression effect by being attached to the vibration isolation target member,
An anti-vibration actuator according to claim 4, wherein an attachment portion for fixing to the anti-vibration target member is provided in one of the stator and the movable element in the anti-vibration actuator, and the stator and the movable An active vibration isolator having a mass provided on the other side of the child.

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