WO2010116704A1 - 能動型制振器および能動型制振器の製造方法 - Google Patents
能動型制振器および能動型制振器の製造方法 Download PDFInfo
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- WO2010116704A1 WO2010116704A1 PCT/JP2010/002466 JP2010002466W WO2010116704A1 WO 2010116704 A1 WO2010116704 A1 WO 2010116704A1 JP 2010002466 W JP2010002466 W JP 2010002466W WO 2010116704 A1 WO2010116704 A1 WO 2010116704A1
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- Prior art keywords
- rubber
- additional mass
- configuration
- linear actuator
- housing
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/1005—Vibration-dampers; Shock-absorbers using inertia effect characterised by active control of the mass
- F16F7/1011—Vibration-dampers; Shock-absorbers using inertia effect characterised by active control of the mass by electromagnetic means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
Definitions
- the present invention relates to an active vibration damper that includes an actuator that generates a vibration force and actively reduces vibration of a vibration suppression target member, and a method for manufacturing the active vibration damper.
- an active vibration damper is known in addition to a dynamic damper that is a passive vibration damper.
- the active vibration damper is provided with an actuator that generates an excitation force as described in, for example, Japanese Patent Application Laid-Open No. 2008-2551 (Patent Document 1), and is active against vibration of a vibration suppression target member. Demonstrate anti-vibration effect.
- a resonance action is used in order to exhibit a target vibration damping effect with excellent energy efficiency.
- a vibration damping vibration system using a movable element as a mass by connecting a stator and a movable element of an actuator with a leaf spring and an elastic connecting rubber is provided. It is configured. Then, by adding an appropriate mass to the mover and adjusting the natural frequency of the vibration system, active vibration suppression in the target vibration frequency range can be achieved by utilizing the resonance action of the vibration suppression vibration system. It is tuned so that the effect is exhibited efficiently.
- the active type vibration damper of the conventional structure is for tuning the resonance frequency of the vibration system for vibration control after specifying the vibration frequency to be controlled.
- the additional mass body is disposed between the opposed surfaces of the actuator and the elastic coupling rubber, the relative position of the leaf spring and the elastic coupling rubber changes as the size of the additional mass body changes, so that the vibration damping vibration system Will change the spring characteristics.
- the leaf spring and the elastic coupling rubber are connected via the additional mass body, the additional mass body must be fixed by forming a fixing portion with respect to the leaf spring and the elastic coupling rubber. It is inevitable that the assembly work becomes complicated and complicated.
- initial stress may be exerted on the leaf spring and the elastic connecting rubber due to a dimensional error of the additional mass body, and it is difficult to obtain stable spring characteristics.
- the additional mass body is disposed in the substantially central portion of the vibration damper between the opposing surfaces of the actuator and the elastic coupling rubber, in order to avoid problems due to the interference of the additional mass body with the actuator and the elastic coupling rubber,
- the overall size of the vibrator is easy to increase.
- a housing that covers the entire vibration damper is adopted for the purpose of stabilizing the operation of the actuator, etc.
- the conventional housing is respectively provided at each outer peripheral portion of the additional mass body and the elastic connecting rubber. It is divided and combined in the axial direction. This is for the purpose of assembling the additional mass body and the elastic connecting rubber and for providing a stopper mechanism for limiting the amount of displacement of the additional mass body.
- the housing is divided at portions close to each other in the axial direction, that is, the additional mass body and the elastic coupling rubber, there is a problem that the structure of the housing is complicated and it is difficult to ensure the sealing performance of the housing.
- the present invention has been made against the background of the above-mentioned circumstances, and the problem to be solved is to easily respond to the request for changing the additional mass body without requiring a significant design change. It is an object of the present invention to provide an active vibration damper having a novel structure and a manufacturing method thereof.
- the present invention provides an active vibration damper and a method for manufacturing the same, in which a change in spring characteristics due to a change in an additional mass body or a dimensional error is suppressed, and a desired vibration damping effect is exhibited with high accuracy. It is also intended to provide.
- Still another object of the present invention is to provide an active vibration damper capable of stabilizing the sealing function of the housing and a method for manufacturing the same.
- the present invention uses an electromagnetic linear actuator provided with a stator and a mover to which vibration forces are exerted on each other, and attaches the stator to a vibration control target member, and the mover via an elastic connecting rubber.
- an inner shaft portion that protrudes on both sides in the direction of application of the excitation force is provided on the movable element, and is separated from the outer peripheral side of the inner shaft portion.
- the outer cylinder portion extending in both axial directions is provided on the stator, and the linear actuator is united by elastically connecting the inner shaft portion and the protruding portions on both axial sides of the outer cylinder portion with a pair of leaf springs.
- the elastic connecting rubber is disposed on one outer side in the axial direction of the linear actuator to connect the inner shaft portion and the outer cylinder portion with the elastic connecting rubber.
- a mass body fixing portion for attaching an additional mass body disposed further outward than the elastic coupling rubber to the linear actuator is provided on the shaft portion, and further, the stator of the linear actuator is attached to the stator.
- a housing that is fixedly provided to partition the relative displacement region between the stator and the mover from an external space and that houses the pair of leaf springs and the elastic coupling rubber on the outer peripheral side of the elastic coupling rubber.
- the opening is formed with an axially divided structure that is fixed to each other with an annular seal interposed therebetween.
- the mass body fixing portion for attaching the additional mass body is provided on the opposite side of the linear actuator with the elastic coupling rubber sandwiched in the inner shaft portion, it easily responds to a change request for the additional mass body and the like. I can do it.
- the additional mass body is arranged further outward than the elastic coupling rubber with respect to the linear actuator, and the elastic coupling rubber and the first and second leaf springs do not pass through the additional mass body. It is connected by the inner shaft. Therefore, the structure of the additional mass body can be prevented from becoming complicated, and the manufacturing and assembling operations are facilitated.
- the additional mass body in the inner shaft portion is attached to the opposite side of the first and second leaf springs with the elastic coupling rubber interposed therebetween, so that the dimensional error of the additional mass body is on the elastic coupling rubber side. Is allowed by the space provided on the opposite side. Therefore, it is possible to prevent a change in the initial stress exerted on the elastic coupling rubber and the first and second leaf springs due to the dimensional error of the additional mass body. As a result, it is possible to maintain a stable spring characteristic and to stably obtain a target vibration damping effect.
- the additional mass body is arranged outward from the elastic coupling rubber with respect to the linear actuator, direct contact of the additional mass body with the linear actuator is avoided. Therefore, the separation distance between the linear actuator, the elastic connecting rubber, and the additional mass body can be set small, and a compact active vibration damper can be practically used.
- the structure can be simplified.
- the housing structure can be simplified because it is not necessary to adopt a split structure for each part of the outer peripheral side of the additional mass body and the outer peripheral side of the elastic coupling rubber as in the case of the vibration damping device of the conventional structure. And improvement in sealing performance can be achieved.
- the openings of the divided portions are fixed by caulking to each other, and are supported by the caulking fixing portions of the openings to extend into the housing.
- An action metal fitting is provided that exerts an action force from another member on the housing, while an action rubber is fixed to an input portion of the action force in the action metal fitting, and the annular seal is connected to the action rubber. It is an embodiment in which it is integrally formed and fixed to the working metal fitting.
- the annular seal is integrally formed with the working rubber that is fixed to the working metal fitting and is required to receive the acting force
- the fastening portion housing of the housing having a divided structure
- Sealing in each opening portion of the divided body can be realized without requiring a special sealing member such as an O-ring, so that the number of parts can be reduced and the structure can be simplified.
- the annular seal is fixed to the working bracket together with the working rubber, forgetting to assemble the annular seal is prevented and the annular seal is assembled in the correct position in the correct position using the working bracket.
- the desired sealing performance can be obtained stably and easily with high reliability.
- the working rubber can be constituted by, for example, the elastic coupling rubber, and in this case, the annular seal is integrally formed with the elastic coupling rubber.
- the working bracket is configured as an outer peripheral fixing bracket that is fixed to the outer peripheral portion of the elastic connecting rubber and that supports the outer peripheral portion of the elastic connecting rubber fixedly with respect to the outer cylinder portion.
- the working rubber can be constituted by, for example, a buffer rubber in a stopper mechanism that limits the amount of displacement of the additional mass body.
- a concave portion is formed on the outer peripheral surface of the additional mass body, while a distal end portion on the inner peripheral side of the working bracket is inserted into the concave portion and a distal end portion on the inner peripheral side of the working bracket.
- a stopper mechanism for limiting the amount of displacement of the inner shaft portion in the axial direction with respect to the outer cylinder portion in a buffer manner is configured.
- the annular seal is integrally formed with the buffer rubber. Further, the contact force in the stopper mechanism that limits the amount of displacement of the additional mass body in the axial direction is caused to act on the metal fitting from the buffer rubber as the action force, and is exerted on the housing by the metal fitting. That is, the working metal fitting is configured as a stopper metal fitting that is fixedly supported with respect to the housing and receives a contact load when the displacement amount of the additional mass body with respect to the housing is limited.
- a caulking fixing structure by metal touch is preferably adopted at a caulking fixing portion of the working metal fitting with respect to the housing. More specifically, a concave groove extending in a direction perpendicular to the axis is formed on the outer peripheral edge portion of the working bracket supported by the caulking fixing portion of the housing, and the action is provided by a connection rubber extending in the concave groove.
- a structure in which the working metal fitting is caulked and fixed by metal touch at a portion on the circumference outside the formation site of the concave groove by partially connecting the rubber and the annular seal on the circumference is suitably adopted.
- the working rubber and the annular seal are integrally formed by the connecting rubber extending in the groove-like concave groove, and the working metal fitting is attached to the housing in a portion on the circumference outside the concave groove forming portion.
- the additional mass body that can be attached to the mass body fixing portion. It is desirable to configure in combination.
- the additional mass body can be selected and attached to the mass body fixing portion of the inner shaft portion. Therefore, it is possible to realize the desired damping characteristics by efficiently and promptly responding to the required resonance frequency.
- the volume of air enclosed in the relative displacement region between the stator and the mover defined by the housing is an excitation force for the mover. It is the same on both sides sandwiched in the direction of action.
- the feature of the present invention relating to the manufacturing method of the active vibration damper is that the elastic coupling rubber described in (Configuration ii) is used for one type of linear actuator described in (Configuration i) below, (Configuration a plurality of types of additional mass bodies described in iii) and a housing described in (Configuration iv) are prepared in combination, and the elastic coupling rubber described in (Configuration ii) is assembled to the linear actuator described in (Configuration i); It is determined whether or not the additional mass body described in (Configuration iii) is attached to the linear actuator described in (Configuration i), and when the additional mass body is further attached, any mass of the additional mass is determined.
- the stator includes a stator and a movable element to which vibration forces are exerted on each other, and the movable element is provided with an inner shaft portion that protrudes on both sides in the direction in which the vibration force acts, and an outer peripheral side of the inner shaft portion.
- the outer cylinder part that is spaced apart from each other in the axial direction and is provided on the stator, while the inner shaft part and the protruding part on both axial sides of the outer cylinder part are elastically connected by a pair of leaf springs as a single unit.
- a linear actuator configured to be operable.
- An elastic connecting rubber that is disposed on one outer side in the axial direction of the linear actuator described in (Configuration i) and connects the inner shaft portion and the outer cylinder portion.
- the linear actuator described in (Configuration i) is disposed further outward than the elastic coupling rubber described in (Configuration ii), and is provided on the inner shaft portion of the linear actuator described in (Configuration i).
- a plurality of types of additional mass bodies with different masses that can be selectively attached to the mass body fixing portion.
- each opening is formed with an axially divided structure that is fixed to each other with an annular seal interposed therebetween, and the fixing of the linear actuator described in (Configuration i)
- a housing which is fixedly attached to a child, partitions a relative displacement region between the stator and the mover from an external space, and accommodates the elastic coupling rubber described in (Configuration ii) together with the pair of leaf springs.
- FIG. 1 shows an active vibration damper 10 having a structure according to the present invention.
- the active vibration damper 10 includes an electromagnetic linear actuator 12.
- the vertical direction means the vertical direction in FIG.
- the linear actuator 12 has a stator 14 and a mover 16.
- the stator 14 includes a coil member 18 as an outer cylinder portion.
- the coil member 18 has a substantially cylindrical shape extending in the axial direction, a pair of coils 20a and 20b wound in a cylindrical shape, and an upper yoke fitting 22 that is attached to the coils 20a and 20b to form a magnetic path. And a central yoke fitting 23 and a lower yoke fitting 24.
- the upper yoke fitting 22 has a substantially annular shape, and an annular first upper magnetic pole portion 25 protruding downward is integrally formed at the inner peripheral edge portion.
- the central yoke fitting 23 includes a substantially annular plate-shaped partition wall portion, an outer peripheral wall portion projecting axially from the outer peripheral edge portion thereof, and an inner peripheral wall portion projecting axially from the inner peripheral edge portion of the partition wall portion. The structure is provided integrally. Further, a portion protruding upward from the partition wall portion in the inner peripheral wall portion of the central yoke fitting 23 is a first lower magnetic pole portion 26, and a portion protruding downward is a second upper magnetic pole portion 27. Yes.
- the lower yoke fitting 24 has a substantially annular shape and is integrally formed with a second lower magnetic pole portion 28 protruding upward at the inner peripheral edge.
- the upper yoke fitting 22 and the lower yoke fitting 24 are superimposed on the central yoke fitting 23 from both sides in the axial direction, and the coil 20a is accommodated between the upper yoke fitting 22 and the central yoke fitting 23, and the center
- the coil 20 b is accommodated between the yoke metal 23 and the lower yoke metal 24 in the axial direction. Thereby, the coil member 18 is formed.
- the coil member 18 is attached to an upper cover 30 as a housing divided body.
- the upper cover 30 as a whole has a substantially bottomed cylindrical shape with a thin large diameter and an opposite direction.
- an annular stepped portion 32 is provided at the lower end opening of the upper cover 30, and a caulking piece 34 extending downward from the outer peripheral edge of the stepped portion 32 is integrally formed.
- the yoke members 22 to 24 of the coil member 18 are press-fitted and fixed to the upper cover 30.
- the mover 16 has a structure in which a first magnetic pole forming member 36 and a second magnetic pole forming member 38 are overlapped on both sides of the magnet 35 in the axial direction.
- the magnet 35 has a substantially annular shape, and an N pole is formed at the upper end in the axial direction, and an S pole is formed at the lower end in the axial direction.
- Each of the first magnetic pole forming member 36 and the second magnetic pole forming member 38 has a substantially annular shape corresponding to the magnet 35, and is formed of a ferromagnetic material such as iron.
- first and second magnetic pole forming members 36 and 38 are superposed on the magnet 35, so that the first and second magnetic pole forming members 36 and 38 are magnetized, and the first magnetic pole forming member 36.
- the N pole is formed at the outer peripheral edge of the second magnetic pole
- the S pole is formed at the outer peripheral edge of the second magnetic pole forming member 38.
- the center portions of the first and second magnetic pole forming members 36 and 38 protrude outward in the axial direction, and the mass of the mass can be efficiently obtained by the first and second magnetic pole forming members 36 and 38. Is possible.
- the magnet 35, the first magnetic pole forming member 36, and the second magnetic pole forming member 38 are inserted on the inner peripheral side of the coil member 18 and are disposed with a predetermined gap therebetween.
- the magnetic pole forming portions (outer peripheral edge portions) of the first and second magnetic pole forming members 36, 38 are radially spaced from the upper and lower magnetic pole portions 25-28 of the yoke fittings 22-24 by a predetermined gap. Opposite.
- an output shaft 40 constituting an inner shaft portion is inserted through the central hole of the magnet 35 and the first and second magnetic pole forming members 36 and 38.
- the output shaft 40 has a substantially rod shape, and a bolt head is integrally formed at one end, and a screw thread is formed at the other end.
- the output shaft 40 is inserted so as to protrude on both axial sides of the first and second magnetic pole forming members 36 and 38.
- the mover 16 is formed by fastening the magnet 35 and the first and second magnetic pole forming members 36 and 38 with the output shaft 40.
- a first leaf spring 42 is disposed above the upper yoke fitting 22 and the first magnetic pole forming member 36.
- the first leaf spring 42 has a substantially disk shape and is not necessarily clear in the drawing, but has a through hole penetrating in the thickness direction and sandwiches the first leaf spring 42. Both sides are in communication with each other.
- the outer peripheral edge of the first leaf spring 42 is sandwiched between the upper yoke fitting 22 and the upper cover 30, and the center is fixed to the first magnetic pole forming member 36 by the output shaft 40. .
- the upper yoke fitting 22 and the first magnetic pole forming member 36 are elastically connected by the first leaf spring 42.
- a second leaf spring 44 is disposed below the lower yoke fitting 24 and the second magnetic pole forming member 38.
- the second leaf spring 44 has substantially the same shape as the first leaf spring 42, and the outer peripheral edge is sandwiched between the lower yoke fitting 24 and the fixing ring 46 fitted to the upper cover 30.
- the central portion is fixed to the second magnetic pole forming member 38 by the output shaft 40.
- the mover 16 and the stator 14 are elastically connected by the first and second leaf springs 42 and 44 on both the upper and lower sides, and are relatively in the axial direction and the direction perpendicular to the axis. Is positioned.
- the stator 14 is fixed to the upper cover 30 and the mover 16 is elastically supported by the upper cover 30 via the first and second leaf springs 42 and 44.
- the linear actuator 12 can be operated by an actuator alone without requiring the attachment of an elastic connecting rubber 48 and a lower cover 60 described later.
- an elastic connecting rubber 48 is disposed below the linear actuator 12.
- the elastic coupling rubber 48 is formed of a substantially annular plate-shaped rubber elastic body, and both sides sandwiching the elastic coupling rubber 48 are mutually connected by a plurality of communication holes 50 that penetrate the radial intermediate portion in the thickness direction. It is communicated.
- a large-diameter cylindrical outer peripheral fixture 52 is vulcanized and bonded to the outer peripheral edge of the elastic connecting rubber 48, and a small-diameter cylindrical inner peripheral fixture 54 is vulcanized and bonded to the inner peripheral edge.
- the elastic connecting rubber 48 is formed as an integrally vulcanized molded product including the outer peripheral fixing bracket 52 and the inner peripheral fixing bracket 54.
- the inner peripheral edge of the elastic coupling rubber 48 is integrally formed with a buffer rubber that is fixed to the upper and lower end surfaces of the inner peripheral fixing bracket 54, and the inner periphery is brought into contact with a lower cover 60 and a stopper metal 68, which will be described later.
- the axial displacement of the fixed fitting 54 and the mover 16 is limited in a buffering manner.
- a flange portion 56 that extends to the outer peripheral side is integrally formed at the upper end of the outer peripheral fixing bracket 52.
- a seal rubber 58 as an annular seal is provided on the outer peripheral surface of the flange portion 56 with a substantially constant cross-sectional shape over the entire circumference.
- the seal rubber 58 has a cylindrical shape that covers the entire outer peripheral surface of the flange portion 56 of the outer peripheral fixture 52 and protrudes at a predetermined height upward in the axial direction.
- a thin connection rubber 61 extending from the inner peripheral surface of the seal rubber 58 is formed on the upper surface of the flange portion 56, and this connection rubber 61 extends to the inner peripheral surface of the outer peripheral fixture 52.
- the elastic coupling rubber 48 is connected.
- the seal rubber 58 is integrally formed by being connected to the elastic coupling rubber 48 by the connection rubber 61, and is formed as an integrally vulcanized molded product attached to the outer peripheral fixture 52.
- the outer peripheral fixing bracket 52 is attached to the lower cover 60.
- the lower cover 60 has a substantially bottomed cylindrical shape, and the upper portion has a larger diameter than the lower portion with a stepped portion 62 provided in the vicinity of the opening so that the opening has an annular shape.
- a collar 63 is formed. Then, the flange portion 56 of the outer peripheral fixture 52 is superimposed on the stepped portion 62 of the lower cover 60, so that the outer peripheral fixture 52 is supported by the lower cover 60.
- a cylindrical bracket 64 is attached to the lower cover 60, and the flange-like attachment piece 65 provided at the lower end of the bracket 64 is fixed to a member to be damped such as a suspension member.
- the child 14 is attached to the vibration suppression target member.
- the caulking piece 34 of the upper cover 30 is externally fitted to the collar 63 of the lower cover 60, and the caulking piece 34 is fitted to the collar 63 and the stepped portion 62 by caulking, whereby the upper cover 30 and the lower cover
- the cover 60 is caulked and fixed in a state of being abutted with each other at the openings.
- a housing 66 for accommodating the first and second leaf springs 42 and 44 and the elastic coupling rubber 48 is formed.
- the housing 66 is a divided structure in which the upper cover 30 and the lower cover 60 are combined in the axial direction.
- An annular plate-shaped stopper fitting 68 is disposed between the step portion 32 of the upper cover 30 and the step portion 62 of the lower cover 60.
- the seal rubber 58 is interposed between the axially opposed surfaces of the stepped portion 32 in the upper cover 30 and the stepped portion 62 in the lower cover 60, and is superimposed on the inner peripheral surface of the collar 63. Since the axial free length of the seal rubber 58 is slightly larger than the axial length of the collar 63, a compression force is exerted on the seal rubber 58, and the flange portion 56 and the stopper metal 68 of the outer peripheral fixture 52 are applied. A connecting portion between the upper cover 30 and the lower cover 60 is sealed by a seal rubber 58 on the outer peripheral surface of the first cover 30. As a result, the space partitioned from the outside by the housing 66 is defined as the hermetic housing area 70. The first and second leaf springs 42 and 44 and the elastic coupling rubber 48 are accommodated in the hermetic housing area 70, and the relative displacement area between the stator and the mover is constituted by the hermetic housing area 70.
- a fixing bracket 52 is employed as an action fitting that receives an acting force in the axial direction such as an excitation force from the linear actuator 12 via the main rubber elastic body 48 and acts on the housing 66.
- a main rubber elastic body 48 as a working rubber is attached to and formed on the outer peripheral surface of the outer peripheral fixture 52, and a sealing rubber 58 is formed on the outer peripheral surface.
- the main rubber elastic body 48 and the seal rubber 58 are integrally connected by a connection rubber 61.
- the output shaft 40 is inserted into the inner peripheral fixing bracket 54 and fastened by a nut 72 screwed to the output shaft 40.
- the central portion of the elastic connecting rubber 48 is attached to the lower end portion of the output shaft 40, and the portion of the output shaft 40 that protrudes downward from the linear actuator 12 is elastically connected to the lower cover 60 by the elastic connecting rubber 48.
- the mover 16 including the output shaft 40 is elastically supported by the vibration suppression target member via the elastic coupling rubber 48 and the housing 66 and is coupled to the stator 14.
- a cylindrical spacer metal fitting 74 attached to the output shaft 40 is interposed between the second leaf spring 44 and the inner peripheral fixing metal fitting 54.
- the active vibration damper 10 having such a structure is attached to the vibration suppression target member via the bracket 64.
- An S pole is formed in the first upper magnetic pole portion 25 and an N pole is formed in the first lower magnetic pole portion 26 by the action of a magnetic field generated by energizing the coil 20a.
- an N pole is formed in the second upper magnetic pole portion 27 and an S pole is formed in the second lower magnetic pole portion 28 by the action of the magnetic field generated by energizing the coil 20b.
- a magnetic attraction force is exerted between the first magnetic pole forming member 36 and the first upper magnetic pole portion 25, and the second magnetic pole forming member 38 and the second upper magnetic pole portion 27, respectively.
- Magnetic repulsive forces are exerted between the one magnetic pole forming member 36 and the first lower magnetic pole portion 26 and between the second magnetic pole forming member 38 and the second lower magnetic pole portion 28.
- the movable element 16 including the first and second magnetic pole forming members 36 and 38 is driven and displaced upward in the axial direction with respect to the stator 14 including the coils 20a and 20b and the magnetic pole portions 25 to 28.
- the current flowing through the coils 20a and 20b is changed to a direct current that is ON / OFF controlled at a predetermined cycle, so that the mover 16 has a magnetic driving force and first and second leaf springs 42, With the elastic force 44, the stator 14 can be displaced back and forth in the axial direction.
- the vibration force of the vibration control target member is reduced in an active or counterbalance manner by applying an excitation force due to the reciprocal displacement of the mover 16 to the vibration control target member.
- the current flowing through the coils 20a and 20b is, for example, an alternating current controlled according to the frequency of the vibration in question, and the drive displacement direction of the mover 16 relative to the stator 14 is changed.
- the mover 16 may be reciprocally displaced in the axial direction.
- the active vibration damper 10 according to FIG. 1 is a dynamic vibration absorber in which the output shaft 40 and the first and second magnetic pole forming members 36 and 38 are masses that can be elastically displaced with respect to the object of vibration isolation. It is said that.
- the output shaft 40 is inserted so as to penetrate the inner peripheral fixing bracket 54, and the lower end portion of the output shaft 40 sandwiches the inner peripheral fixing bracket 54 (elastic connecting rubber 48).
- the mass body fixing portion 75 protrudes on the opposite side to the linear actuator 12. Then, by changing the axial dimension (length) of the output shaft 40, the axial dimension (depth) of the lower cover 60, and the like, an additional mass 76 as an additional mass body is disposed in the sealed housing region 70. Then, it can be fixed to the mover 16.
- the mass body fixing portion 75 which is the mounting portion of the additional mass 76, is greatly projected into the space where the additional mass 76 is disposed, and the mass body An additional mass 76 having a sufficient size can be attached to the fixing portion 75.
- additional mass [1], additional mass [2],. ..., An additional mass [n] is prepared, and the linear actuator 12 and the additional mass 76 are combined.
- the additional mass 76 has a substantially circular block shape, and is formed with a mass corresponding to the target damping characteristic of the active vibration damper 10.
- a fitting portion 77 that protrudes upward is integrally formed at a central portion in the radial direction of the additional mass 76, and an insertion hole 79 that penetrates the center in the axial direction is formed.
- the outer peripheral surface of the additional mass 76 is covered with a covering rubber layer 78, and a stopper mechanism that limits the amount of displacement of the additional mass 76 in a buffering manner by contacting the additional mass 76 with the lower cover 60 and the outer peripheral fixing bracket 52. Is configured.
- the covering rubber layer 78 does not need to be vulcanized and bonded to the additional mass 76, and protrudes radially inward from the opening portions at both ends in the axial direction and is locked to both end surfaces in the axial direction of the additional mass 76 as illustrated.
- the separate covering rubber layer 78 can be attached to the additional mass 76 without being attached thereto.
- the additional mass 76 is superimposed on the inner peripheral fixing bracket 54 from below, and the fitting portion 77 of the additional mass 76 is fitted into the inner peripheral fixing bracket 54. Further, the output shaft 40 is inserted into the insertion hole 79 of the additional mass 76, and the nut 72 is screwed to the tip of the output shaft 40, whereby the additional mass 76 is fixed to the movable element 16 side.
- the additional mass 76 constitutes a mass of the dynamic vibration absorber together with the output shaft 40, the magnet 35, the first and second magnetic pole forming members 36, 38, and the like.
- the additional mass 76 is vibrated up and down in the axial direction. A circular recess that opens downward is formed in the central portion of the additional mass 76 in the radial direction, and functions as a space for accommodating the nut 72.
- the additional mass 76 can be mounted and not mounted, and the mass of the additional mass 76 can be selected at the time of manufacture. An example of a method for manufacturing the active vibration damper 10 will be described below.
- stator 14 provided with the coil member 18 is fixed to the upper cover 30 and the mover 16 provided with the output shaft 40 is elastically attached to the stator 14 by the first and second leaf springs 42 and 44.
- the linear actuator 12 which can be act
- the fixing brackets 52 and 54 are integrated with each other.
- An integrally vulcanized molded product of the elastic connecting rubber 48 provided in the above is formed.
- the preparation process for the elastic connecting rubber is completed.
- additional mass [1], additional mass [2],..., Additional mass [n]) having different masses are prepared.
- the preparation process of an additional mass body is completed by the above.
- a lower cover 60 constituting the housing 66 is prepared.
- a plurality of types of lower covers may be prepared in accordance with the shapes of the plurality of types of additional masses 76, and an appropriate lower cover 60 may be selected from the plurality of types of lower covers in the housing forming process described later.
- An upper cover 30 that constitutes the housing 66 is also prepared and constitutes a part of the linear actuator 12. Thus, the housing preparation process is completed.
- the stopper fitting 68 is extrapolated to the output shaft 40 of the linear actuator 12 and overlapped with the outer peripheral fixing fitting 52, and the output shaft 40 is inserted into the spacer fitting 74 and the inner peripheral fixing fitting 54.
- the elastic connecting rubber 48 is attached to the output shaft 40, and the attaching process of the elastic connecting rubber is completed.
- it may be temporarily fixed by attaching the nut 72 to the output shaft 40 with a weak fastening force, or the output shaft 40 is press-fitted into the inner peripheral fixing bracket 54. It may be fixed.
- the additional mass 76 is attached to the lower end portion of the output shaft 40.
- the additional mass 76 to be mounted is determined from a plurality of types having different masses. Then, the determined additional mass 76 is attached to the mass body fixing portion 75 which is the lower end portion of the output shaft 40 and is fixed by the nut 72, so that tuning of the damping characteristics is set according to the mass of the additional mass 76. .
- the additional mass body mounting process is completed.
- the lower cover 60 is selected in accordance with the shape and size of the additional mass 76, and the selected lower cover 60 is covered from below the elastic connecting rubber 48.
- the opening part of the upper cover 30 and the opening part of the lower cover 60 are mutually fastened by caulking, and the housing 66 is formed.
- the seal rubber 58 is sandwiched between the openings of the upper and lower covers 30 and 60, and the connecting portion of the upper and lower covers 30 and 60 is sealed, so that the space partitioned by the housing 66 is sealed from the external space.
- a sealed housing area 70 in which the first and second leaf springs 42 and 44 and the elastic coupling rubber 48 are housed is provided.
- a bracket 64 prepared in advance is fixed to the lower cover 60 by external fitting.
- the additional mass 76 can be attached or not attached, and the size and shape of the additional mass 76 can be arbitrarily selected by slightly changing the parts. Therefore, it is possible to manufacture and provide a plurality of types of active vibration dampers having different vibration damping performances by sharing many parts. It should be noted that the length of the output shaft 40 and the depth of the lower cover 60 are set to be large so as to secure a space for arranging the additional mass 76 regardless of whether the additional mass 76 is attached or not. It is also possible to eliminate the need for changes according to the additional mass 76 of the lower cover 60.
- the elastic connecting rubber 48 is supported at the connecting portion between the upper cover 30 and the lower cover 60, and the connecting portion between the covers 30 and 60 is sealed by the seal rubber 58.
- the space 14 for accommodating the stator 14 and the movable element 16, the elastic coupling rubber 48, and the additional mass 76 in the linear actuator 12 is hermetically sealed from the external space, and foreign matters such as water and dust enter. It is possible to avoid malfunctions and deterioration of durability due to the operation.
- the seal rubber 58 is integrally formed with the elastic connecting rubber 48, an increase in the number of parts can be prevented.
- FIG. 4 shows an active vibration damper 80 as a second embodiment of the present invention.
- the active vibration damper 80 includes an electromagnetic linear actuator 82.
- members and portions that are substantially the same as those of the first embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted.
- the linear actuator 82 has a stator 84 and a mover 86.
- the stator 84 includes a coil member 92 as an outer tube portion formed by winding the coil 20 around a bobbin 90.
- the bobbin 90 is a member formed of a nonmagnetic material (such as a hard synthetic resin) and has a substantially cylindrical shape as a whole. Further, a flange-shaped support portion is integrally formed at the lower end portion of the bobbin 90. The bobbin 90 is fitted into the upper cover 94.
- the upper cover 94 has an inverted bottomed cylindrical shape similar to that of the upper cover 30 in the first embodiment, and a stepped portion 96 is provided in the opening portion, and a lower side sandwiching the stepped portion 96 is The diameter is larger than the upper side.
- the bobbin 90 is supported by the upper cover 94, whereby the stator 84 is fixed to the upper cover 94.
- the coil 20 is disposed at a predetermined distance on the inner peripheral side with respect to the upper cover 94.
- the mover 86 has a structure in which an upper yoke fitting 100 and a lower yoke fitting 102 that form a magnetic path with respect to the magnet 98 are assembled.
- the magnet 98 has a substantially annular shape, and is magnetized so that magnetic poles are formed at both ends in the axial direction.
- the upper yoke fitting 100 is a member having a reversely substantially bottomed cylindrical shape formed of a ferromagnetic material such as iron, and an insertion hole penetrating the bottom wall portion is formed in a central portion in the radial direction.
- the lower yoke fitting 102 is made of a ferromagnetic material similar to that of the upper yoke fitting 100, has a substantially annular plate shape, and has an outer peripheral portion that gradually becomes thinner toward the outer peripheral side.
- the upper bottom wall portion of the upper yoke fitting 100 is superimposed on the upper surface of the magnet 98, and the lower yoke fitting 102 is superimposed on the lower surface of the magnet 98. Accordingly, the lower end portion of the peripheral wall portion of the upper yoke fitting 100 is arranged at a predetermined distance on the outer peripheral side of the lower yoke fitting 102, and the radial direction between the upper yoke fitting 100 and the lower yoke fitting 102 in the radial direction is arranged. A magnetic field is formed.
- an output shaft 104 is inserted through the center of the magnet 98 and the yoke fittings 100 and 102 in the radial direction.
- the output shaft 104 has a substantially rod shape, and is threaded at both ends.
- the output shaft 104 has a two-sided width at the axially intermediate portion, and the magnet 98 and the yoke metal fittings 100 and 102 are extrapolated to the axially intermediate portion, whereby the magnet 98 and the yoke metal fitting 100 are provided. , 102 with respect to the output shaft 104 is defined, and rotation in the circumferential direction is prevented.
- a nut 72 is screwed onto the upper end portion of the output shaft 104, whereby the magnet 98 and the yoke fittings 100, 102 are fastened to each other.
- both sides in the axial direction of the output shaft 104 are elastically connected to the upper cover 94 by the first and second leaf springs 42 and 44, so that the movable element 86 including the output shaft 104 is moved to the upper cover.
- the stator 84 is elastically connected to the stator 84 in such a manner as to allow a slight displacement in the axial direction.
- the coil 20 of the stator 84 is inserted between the upper yoke fitting 100 and the lower yoke fitting 102 in the radial direction of the movable element 86 and is arranged with a predetermined distance from them.
- the center portion of the first leaf spring 42 is fixed to the output shaft 104 with a nut 72, and the outer peripheral edge portion thereof is the upper bottom wall portion and the upper cover portion of the upper cover 94. It is clamped by an annular fixing ring 106 fitted in 94.
- the center part of the second leaf spring 44 is externally fitted to the output shaft 104 and is supported by the spacer metal fitting 74 using the fastening force of the nut 72, and the outer peripheral edge portion is attached to the upper cover 94. It is clamped between a press-fitted and annular plate-shaped stopper fitting 108 and a bobbin 90.
- the linear actuator 82 that can be operated alone by energization from the outside is realized.
- the linear actuator 82 when the coil 20 is energized from an external power source, a current flows in the magnetic field formed by the magnet 98 and the yoke fittings 100 and 102, and the mover 86 is moved in the axial direction with respect to the stator 84. An excitation force that causes displacement is generated.
- the lower cover 110 has a substantially bottomed cylindrical shape similar to that of the lower cover 60 of the first embodiment, and a caulking piece 114 is integrally formed on the upper side with the stepped portion 112 sandwiched in the opening. ing.
- a housing 116 is formed.
- a seal rubber 58 is sandwiched between the stepped portion 96 of the upper cover 94 and the stepped portion 112 of the lower cover 110, and the connecting portion between the upper cover 94 and the lower cover 110 is sealed, so that the external space A hermetic housing area 70 that is hermetically sealed is formed.
- an additional mass 76 can be attached. That is, as shown in FIG. 5, the lower end portion of the output shaft 104 protruding downward from the inner peripheral fixture 54 is inserted into the insertion hole of the additional mass 76, and the nut 72 is screwed into the output shaft 40. As a result, the additional mass 76 is mounted on the opposite side of the linear actuator 82 with the elastic coupling rubber 48 interposed therebetween. As a result, even in the active vibration damper 80, it is possible to change the tuning of the vibration damping characteristic by selecting the additional mass 76 without changing many of the components.
- FIG. 6 shows an active vibration damper 120 as a third embodiment of the present invention.
- the active vibration damper 120 of the present embodiment includes the same linear actuator 12 as that of the first embodiment, as can be seen in comparison with FIG. 2 showing the active vibration damper 10 of the first embodiment.
- an elastic connecting rubber 48 and an additional mass 76 are disposed below the linear actuator 12, and the elastic connecting rubber 48 and the additional mass 76 are arranged between the upper cover 30 and the lower portion. It is housed in a sealed housing area 70 defined by the cover 60.
- members having the same structure as that of the first embodiment are denoted by the same reference numerals as those of the first embodiment.
- the stopper mechanism that limits the displacement amount of the additional mass 72 in a buffer manner, and the seal rubber structure in the connection portion between the upper cover 30 and the lower cover 60 that constitute the housing 66 are the first embodiment. Different structure is adopted.
- the axially upper portion is a small-diameter outer peripheral surface 124 with the step surface 122 of the axially intermediate portion interposed therebetween.
- an upper contact fitting 126 having an annular plate shape is overlaid on the upper end surface of the additional mass 72.
- the upper abutting metal fitting 126 is assembled by sandwiching and fixing the inner peripheral portion between the additional mass 76 and the inner peripheral fixing metal fitting 54, and the outer peripheral portion 128 of the upper abutting metal fitting 126 is a small-diameter outer periphery of the additional mass 72. It protrudes outward from the surface 124.
- the stepped surface 122 of the additional mass 72 and the outer peripheral portion 128 of the upper contact fitting 126 are opposed to each other in the axial direction across the small-diameter outer peripheral surface 124 of the additional mass 72, and the additional mass 72 is placed on the outer peripheral surface of the additional mass 72.
- An annular recess 130 is formed which opens and extends over the entire circumference in the circumferential direction.
- a stopper fitting 132 as a working fitting is disposed on the outer peripheral side of the additional mass 72.
- the stopper fitting 132 has a substantially cylindrical shape, and a fixed portion 134 that extends to the outer peripheral side is integrally formed at the upper end portion in the axial direction, and extends to the inner peripheral side at the lower end portion in the axial direction.
- a contact portion 136 is integrally formed.
- the fixing portion 134 is overlapped with the stepped portion 62 of the lower cover 60 that constitutes the housing 66, and is fixed by caulking with the caulking piece 34 of the upper cover 30 and assembled. Under such an assembled state, the abutting portion 136 of the stopper fitting 132 is inserted inward from the outer peripheral opening with respect to the concave portion 130 of the additional mass 72.
- a seal rubber 58 is formed on the outer peripheral surface of the fixed portion 134 and protrudes in a cylindrical shape from the fixed portion 134 toward the upper side in the axial direction.
- the housing 66 is the same as in the first embodiment.
- the caulking and fixing portions of the upper and lower covers 30 and 60 constituting the above are sealed by a seal rubber 58.
- a buffer rubber 138 is formed on the contact portion 136 so as to cover the entire surface of the contact portion 136, and a predetermined gap is formed between the outer surface of the buffer rubber 138 and the inner surface of the recess 130 of the additional mass 72.
- the contact portion 136 is opposed to the inner surface of the recess 130 in the axial direction and the direction perpendicular to the axis. Accordingly, when the additional mass 72 is relatively displaced with respect to the housing 66 and the stator 14 fixed thereto, the contact portion of the stopper fitting 132 with respect to the inner surface of the concave portion 130 of the additional mass 72.
- a stopper mechanism is configured in which 136 strikes through the buffer rubber 138 to limit the amount of displacement of the additional mass 72 in a buffering manner.
- connection rubber 140 formed on the outer peripheral surface of the stopper fitting 132.
- the fixing portion 134 provided on the outer peripheral edge of the stopper fitting 132 is formed with a concave groove 142 extending in the radial direction at a plurality of locations on the circumference, and is opened downward.
- the concave groove 142 is filled.
- the connection rubber 140 is deposited.
- the connection rubber 140 is partially formed on the circumference of the stopper fitting 132, and in a portion where the connection rubber 140 is not formed, the caulking piece is not connected to the fixing portion 134 without using the connection rubber 140.
- the caulking fixing force by 34 is exerted, and the strong fixing force by the metal touch is stably exhibited over a long period of time.
- the fixing portion 134 is uneven so as to wave up and down in the circumferential direction, and a concave groove 142 that opens downward is formed in a portion that protrudes upward, and the convex portion protrudes downward.
- the metal layer is overlapped with the stepped portion 62 of the lower cover 60 by metal touch.
- the outer peripheral fixing bracket 52 vulcanized and bonded to the outer peripheral surface of the elastic coupling rubber 48 has a straight cylindrical shape, and is press-fitted and fixed to the axially upper opening portion of the stopper bracket 132. In this way, it is fixed to the housing 66 via the stopper fitting 132.
- a support metal 144 is disposed on the fixing part 134 of the stopper metal 132.
- the support fitting 144 has an annular plate shape and includes an annular protrusion 146 that rises slightly upward at the inner peripheral edge.
- a pressing rubber 148 is formed to cover the outer surface of the annular protrusion 146.
- the outer peripheral portion of the support metal 144 is directly superimposed on the fixing part 132 of the stopper metal 132, and together with the fixing part 132, the step part 62 of the lower cover 60 and the step difference of the upper cover 30 constituting the housing 66. It is clamped and fixed by a caulking piece 34 of the upper cover 30, sandwiched between opposing surfaces to the portion 32.
- the support metal fitting 144 is metal-touched over the entire circumference with respect to the stepped portion 32 of the upper cover 30 and at a plurality of positions on the circumference with respect to the fixing portion of the stopper metal fitting 132.
- the metal is touched at the part that protrudes upward.
- the seal rubber 58 is sandwiched between the step portions 32 and 62 of the upper and lower covers 30 and 60 to seal the caulking fixing portion.
- the inner peripheral portion of the support fitting 144 fixed by caulking in this manner protrudes from the fixing portion 134 of the stopper fitting 132 toward the inner circumference side, and the upper end surface of the outer circumference fixing fitting 52 press-fitted and fixed to the stopper fitting 132 is provided. Pressing to prevent upward slipping.
- the annular protrusion 146 of the support metal 144 slightly enters the lower opening of the upper cover 30. The upper end surface of the annular protrusion 146 is superimposed and pressed against the fixing ring 46 of the linear actuator 12 from below in the axial direction via a pressing rubber 148.
- a stopper mechanism for limiting the displacement amount of the additional mass 76 is provided. Since the buffer rubber 138 to be formed is attached to the stopper fitting 132, it is not necessary to provide a large covering rubber layer (78) for the additional mass 76, and the manufacture is facilitated. In particular, since the stopper fitting 132 is smaller than the additional mass 76 and has a sufficiently small heat capacity, the mold can be reduced in size and added to the mold as compared with the case where the covering rubber layer (78) is vulcanized and bonded to the additional mass 76. It is possible to shorten the sulfurization time.
- the stopper mechanism 132 that limits the amount of displacement on both sides in the axial direction of the additional mass 76 by adopting the stopper fitting 132 having the contact portion 136 that enters the recess 130 formed on the outer peripheral surface of the additional mass 76, This can be realized with a compact and simple structure.
- the seal rubber 58 that seals the caulking fixing portion of the housing 66 is integrally formed with the buffer rubber 138, and is integrally vulcanized with the stopper fitting 132, so that the durability and load performance required for both rubbers are enhanced.
- the material to be satisfied can be selected, and the characteristics of the seal rubber 58 and the buffer rubber 138 can be improved.
- the seal rubber 58 is integrally formed with the buffer rubber 138 by attaching the seal rubber 58 to the stopper fitting 132.
- the seal rubber 58 is integrally formed with the buffer rubber 138 by attaching the seal rubber 58 to the stopper fitting 132.
- the stopper fitting 132 For example, as shown in FIG. Can be attached to the support metal 144 and formed integrally with the pressing rubber 148.
- the support fitting 144 is made into a corrugated shape in the circumferential direction, etc.
- a concave groove 142 that opens in the lower surface of 144 and extends in the radial direction is formed at an appropriate position on the circumference, and the seal rubber 58 and the pressing rubber 148 are connected to each other by a connection rubber 140 that is deposited on the concave groove 142 and is integrally formed. It is desirable to do.
- the support fitting 144 is superposed on the stepped portion 32 of the upper cover 30 and the fixing portion 134 of the stopper fitting 132 by metal touch, and each of the upper and lower covers 30, 60 is overlapped.
- Each member can be firmly caulked and fixed between the stepped portions 32 and 62 by metal touch.
- the support fitting 144 that receives the relative displacement force (extraction force) downward of the stator 18 with respect to the upper cover 30 as an acting force by the contact with the fixing ring 46 is exerted on the housing.
- a seal rubber 58 as an annular seal is integrally formed with a pressing rubber 148 as an action rubber deposited on an annular protrusion 146 which is an input portion of an action force in the action bracket. It is.
- the inner shaft portion and the outer cylinder portion are not necessarily limited to members that are continuous over the entire length in the axial direction, and may be constituted by a plurality of members divided in the axial direction.
- the upper protruding portion of the inner shaft portion is a protrusion formed integrally with the first magnetic pole forming member
- the lower protruding portion of the inner shaft portion is integrally formed with the second magnetic pole forming member. Structures that are shaped like protrusions can also be employed.
- the housing only needs to have a divided structure in the axial direction, and the connecting means of the upper cover and the lower cover constituting the housing is not limited.
- a fixing flange may be provided in each opening of the upper cover and the lower cover, and the fixing flange may be connected by a bolt to form a housing.
- the sealed housing regions 70 are formed on both axial sides sandwiching the magnet 35 and the first and second magnetic pole forming members 36 and 38.
- the first and second air chambers can be regarded as a structure communicating with the magnet 35 and the constricted region formed between the first and second magnetic pole forming members 36 and 38 and the coil member 18. When a high frequency excitation force is applied, the constricted region is substantially closed, and the first and second air chambers are substantially sealed.
- the concave portion 130 opened on the outer peripheral surface of the additional mass 76 may be partially formed in the circumferential direction.
- the contact portion 136 of the stopper fitting 132 inserted therein and the circumferential end surfaces of the concave portion 130 contact each other around the central axis of the additional mass 76. It is possible to provide a stopper function for restricting the amount of displacement in the circumferential direction in a buffering manner.
- the active vibration damper according to the present invention is not necessarily employed only for automobiles, and may be employed for, for example, trains and motorcycles. Also, when adopting for automobiles, the vibration damping target member is not limited to the suspension member.
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Abstract
Description
(構成i)
相互に加振力が及ぼされる固定子と可動子を備えており、該可動子には加振力の作用方向両側に突出するインナ軸部が設けられていると共に、該インナ軸部の外周側に離隔して軸方向両側に延びるアウタ筒部が該固定子に設けられている一方、それらインナ軸部とアウタ筒部における軸方向両側の突出部が一対の板ばねで弾性連結されて単体で作動可能に構成されたリニアアクチュエータ。
(構成ii)
前記(構成i)記載のリニアアクチュエータにおける軸方向一方の外方に配設されて前記インナ軸部と前記アウタ筒部を連結する弾性連結ゴム。
(構成iii)
前記(構成i)記載のリニアアクチュエータに対して前記(構成ii)記載の弾性連結ゴムよりも更に外方に配設されて、該(構成i)記載のリニアアクチュエータにおける前記インナ軸部に設けられた質量体固定部に対して選択的に取付可能とされた、互いに異なる質量が設定された複数種類の付加質量体。
(構成iv)
前記(構成ii)記載の弾性連結ゴムの外周側において各開口部が環状シールを挟んで互いに固着される軸方向の分割構造をもって形成されており、前記(構成i)記載のリニアアクチュエータの前記固定子に対して固定的に設けられて該固定子と前記可動子の相対変位領域を外部空間から仕切ると共に前記一対の板ばねと共に該(構成ii)記載の弾性連結ゴムを収容するハウジング。
Claims (9)
- 相互に加振力が及ぼされる固定子と可動子を備えた電磁式のリニアアクチュエータを用い、該固定子を制振対象部材に取り付けると共に、該可動子を弾性連結ゴムを介して該制振対象部材で弾性的に支持せしめた能動型制振器において、
前記加振力の作用方向両側に突出するインナ軸部を前記可動子に設けると共に、該インナ軸部の外周側に離隔して軸方向両側に延びるアウタ筒部を前記固定子に設けて、それらインナ軸部とアウタ筒部における軸方向両側の突出部を一対の板ばねで弾性連結することにより、前記リニアアクチュエータを単体で作動可能に構成する一方、該リニアアクチュエータにおける軸方向一方の外方に前記弾性連結ゴムを配設して、該弾性連結ゴムで該インナ軸部と該アウタ筒部を連結すると共に、該インナ軸部には、該リニアアクチュエータに対して該弾性連結ゴムよりも更に外方に配設される付加質量体を取り付けるための質量体固定部を設け、更に、該リニアアクチュエータの該固定子に対して固定的に設けられて該固定子と該可動子の相対変位領域を外部空間から仕切ると共に該一対の板ばねと該弾性連結ゴムを収容するハウジングを、該弾性連結ゴムの外周側において各開口部が環状シールを挟んで互いに固着される軸方向の分割構造をもって形成したことを特徴とする能動型制振器。 - 軸方向の分割構造とされた前記ハウジングにおいて、その分割部分の前記各開口部が相互にかしめ固定されており、該各開口部のかしめ固定部分で支持されることにより該ハウジング内に延び出して他部材からの作用力を該ハウジングに及ぼす作用金具が設けられている一方、
該作用金具における前記作用力の入力部分に作用ゴムが固着されていると共に、前記環状シールが該作用ゴムと一体形成されて該作用金具に固着されている請求項1に記載の能動型制振器。 - 前記作用ゴムが前記弾性連結ゴムとされており、前記環状シールが該弾性連結ゴムと一体形成されている請求項2に記載の能動型制振器。
- 前記付加質量体の外周面に凹部が形成されている一方、前記作用金具の内周側の先端部が該凹部に差し入れられていると共に該作用金具の内周側の先端部に対して前記作用ゴムとしての緩衝ゴムが固着されることにより、該凹部内面に対する該作用金具の当接による前記作用力を該緩衝ゴムを介して前記ハウジングに及ぼしめて、該付加質量体の前記アウタ筒部に対する前記インナ軸部の軸方向への変位量を緩衝的に制限するストッパ機構が構成されている請求項2に記載の能動型制振器。
- 前記ハウジングのかしめ固定部分で支持された前記作用金具の外周縁部には、軸直角方向に延びる凹溝が形成されていると共に、該凹溝内を延びる接続ゴムによって前記作用ゴムと前記環状シールとが周上で部分的に接続されていることにより、該凹溝の形成部位を外れた周上の部分において該作用金具がメタルタッチでかしめ固定されている請求項2~4の何れか1項に記載の能動型制振器。
- 前記リニアアクチュエータの一種類に対して、何れも前記質量体固定部に装着可能とされた前記付加質量体として、互いに質量が異なる複数種類を組み合わせて構成した請求項1~5の何れか1項に記載の能動型制振器。
- 前記ハウジングによって画成された前記固定子と前記可動子の相対変位領域に封入された空気の容積が、該可動子を加振力の作用方向に挟んだ両側において同じとされている請求項1~6の何れか1項に記載の能動型制振器。
- 以下の(構成i)記載のリニアアクチュエータの一種類に対して、(構成ii)記載の弾性連結ゴム、(構成iii)記載の複数種類の付加質量体、(構成iv)記載のハウジングを組み合わせて準備し、該(構成i)記載のリニアアクチュエータに対して該(構成ii)記載の弾性連結ゴムを組み付けると共に、該(構成i)記載のリニアアクチュエータに対して該(構成iii)記載の付加質量体を装着するか否かを決定し、更に該付加質量体を装着する場合には何れの質量の該付加質量体を装着するかを決定して、かかる決定に従って該リニアアクチュエータへの該付加質量体を装着する工程を行ない、その後、(構成iv)記載のハウジングを形成することを特徴とする能動型制振器の製造方法。
(構成i) 相互に加振力が及ぼされる固定子と可動子を備えており、該可動子には加振力の作用方向両側に突出するインナ軸部が設けられていると共に、該インナ軸部の外周側に離隔して軸方向両側に延びるアウタ筒部が該固定子に設けられている一方、それらインナ軸部とアウタ筒部における軸方向両側の突出部が一対の板ばねで弾性連結されて単体で作動可能に構成されたリニアアクチュエータ。
(構成ii) 前記(構成i)記載のリニアアクチュエータにおける軸方向一方の外方に配設されて前記インナ軸部と前記アウタ筒部を連結する弾性連結ゴム。
(構成iii) 前記(構成i)記載のリニアアクチュエータに対して前記(構成ii)記載の弾性連結ゴムよりも更に外方に配設されて、該(構成i)記載のリニアアクチュエータにおける前記インナ軸部に設けられた質量体固定部に対して選択的に取付可能とされた、互いに異なる質量が設定された複数種類の付加質量体。
(構成iv) 前記(構成ii)記載の弾性連結ゴムの外周側において各開口部が環状シールを挟んで互いに固着される軸方向の分割構造をもって形成されており、前記(構成i)記載のリニアアクチュエータの前記固定子に対して固定的に設けられて該固定子と前記可動子の相対変位領域を外部空間から仕切ると共に前記一対の板ばねと共に該(構成ii)記載の弾性連結ゴムを収容するハウジング。 - 前記(構成ii)記載の弾性連結ゴムの組付けに先立って、前記(構成i)記載のリニアアクチュエータの単体に対して作動特性を検査する請求項8に記載の能動型制振器の製造方法。
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US20110057367A1 (en) | 2011-03-10 |
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DE112010001580T5 (de) | 2012-08-30 |
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