JP2006300305A - Dynamic damper, dynamic damper unit, and manufacturing method of dynamic damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dynamic damper, a dynamic damper unit with the dynamic damper, and a manufacturing method of the dynamic damper capable of improving vibration-proofing effects of an engine mount by absorbing vibrations transmitted to respective sections of the engine mount. <P>SOLUTION: The active dynamic damper (ACD) is mounted 101 on a stabilizer metal fitting 58 of the engine mount 50. The ACD 101 can change a direction of current flowing through a coil, and a moving element can be reciprocated in an axial direction of a stator. Therefore, resonance of the stabilizer metal fitting 58 can be restrained so that the moving element is operated in response to vibrations of the stabilizer metal fitting 58, and considerable reduction on the vibration-proofing effect of the engine mount 50 can be lessened. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dynamic damper, a dynamic damper unit including a dynamic damper, and a method for manufacturing the dynamic damper.

  2. Description of the Related Art Conventionally, an engine mount that reduces transmission of vibration generated from an automobile engine to a frame that supports the engine is known. For example, the engine mount is formed by connecting a first mounting tool attached to the engine side, a cylindrical second mounting tool attached to the frame side, and the second mounting tool and the first mounting tool. An anti-vibration base, a diaphragm that is attached to the second fixture and forms a liquid chamber between the anti-vibration base, a partition plate that divides the liquid chamber into a first liquid chamber and a second liquid chamber, and a first liquid And an orifice that communicates between the chamber and the second liquid chamber. In addition to the above-described configuration, the engine mount is formed on the second mounting tool, and is supported by the first mounting tool so as to be held by the first mounting tool. And a stopper member for restricting at least displacement of the stopper portion in the axial direction of the tool. When a large displacement is input, the stopper portion and the stopper member are in contact with each other, and the vibration-proof base is prevented from excessive compression and expansion / contraction (large displacement).

  However, if the natural frequency of each part of the engine mount (partition plate, anti-vibration base, stopper member, etc.) is within the range of engine frequency during normal operation, each part will resonate during normal operation. As a result, a sufficient vibration isolation effect could not be obtained due to an increase in the spring constant of the engine mount.

  Therefore, conventionally, the natural frequency of each part is configured to be high so that it is outside the range of the engine frequency during normal operation, and the resonance of each part during normal operation has been reduced. . By configuring the natural frequency of the stopper member, partition plate and vibration isolating base to be high, the vibration isolation effect is enhanced by reducing the resonance of each part during normal operation, but when it is not during normal operation The engine frequency may fall within the range of the natural frequency of each part, and the parts of the engine mount may resonate. In this case, there is a problem that the spring constant of the engine mount suddenly increases and the vibration isolation effect is significantly reduced.

Accordingly, the present applicant has disclosed a vibration isolator (engine mount) that attaches a dynamic damper to the stopper member and absorbs the vibration of the stopper member in particular, as shown in JP-A-2004-68950. By attaching a dynamic damper to the stopper member, even if the partition plate or the vibration isolating base resonates due to a state that is not in a normal operation state, the stopper member can be prevented from resonating. Compared to the case where all resonate, the spring constant of the engine mount can be suppressed from becoming extremely large (see Patent Document 1).
JP 2004-68950 A

  However, in the configuration in which the dynamic damper is attached to the engine mount described above, the vibration can be absorbed if the vibration of the stopper member corresponds to the resonance frequency f of the dynamic damper, but the vibration does not correspond to the resonance frequency f. When this occurs, the vibration of the stopper member cannot be absorbed. As a result, the partition plate, the vibration isolating base, and the stopper member resonate, and there is a problem that the engine vibration generated according to the operating state cannot be accurately prevented by the engine mount.

  The dynamic damper is mainly composed of a mass member having a predetermined mass, and a connecting portion made of a rubber-like elastic material that connects the mass member and the frame. Since the connecting portion and the mass member are mass-produced from a reduction in manufacturing cost, the weight of the mass member varies and the elastic force of the connecting portion also varies. Generally, the resonance frequency f is determined by the mass of the mass member and the elastic force of the connecting portion. Therefore, there is a problem that it is difficult to accurately prevent vibration of the stopper member because the resonance frequency f of the dynamic damper is different only by variation in either the mass of the mass member or the elastic force of the connecting portion. There was a point.

  The present invention has been made in order to solve the above-described problems. A dynamic damper capable of absorbing vibration transmitted to each part of the engine mount and improving the vibration isolation effect of the engine mount, and the dynamic damper are provided. An object of the present invention is to provide a dynamic damper unit provided and a method of manufacturing the dynamic damper.

  In order to achieve this object, the dynamic damper according to claim 1 is provided with a first fixture that is attached to a vibrating body, a cylindrical second fixture that is attached to a support that supports the vibrating body, and the first damper. An anti-vibration base composed of a rubber-like elastic material by connecting the attachment and the second attachment; and a diaphragm that is attached to the second attachment and forms a liquid sealed chamber between the anti-vibration base; A partition plate that divides the liquid sealing chamber into a first liquid chamber on the vibration-isolating base side and a second liquid chamber on the diaphragm side; and an orifice that allows the first liquid chamber and the second liquid chamber to communicate with each other. A base member attached to the vibration isolator and attached to at least one of the first fixture side or the second fixture side, a stator fixed to the base member and having a magnetic body at least partially, and the fixing Child A movable element that is disposed so as to be reciprocally movable along one axial direction and has a magnetic pole part formed at a position corresponding to the magnetic body of the stator, and is wound around the magnetic pole part of the movable element so that a current flows. The magnet is reciprocated with respect to the stator and attenuates the vibration of the vibration isolator by the magnetomotive force generated when the coil is excited by being energized with current. .

  According to the dynamic damper of the first aspect, when a current flows through the coil, the coil is excited and a magnetomotive force is generated in the magnetic pole portion, and the mover moves in the direction of 1 with respect to the stator by the action of the magnetomotive force. Operate. When the direction of the current flowing through the coil is changed, the direction of the magnetomotive force generated in the magnetic pole portion changes, and the mover operates in the opposite direction to the one direction. Further, since the base member is attached to at least one of the first fixture side of the vibration isolator or the second fixture side of the vibration isolator, the dynamic damper is attached to at least one of the first fixture side or the second fixture side. It is attached. Therefore, by adjusting the direction of the current flowing through the coil, the movable element can be reciprocated so as to attenuate the vibration transmitted from the vibrating body to the vibration isolator, and the vibration isolating effect of the vibration isolator can be enhanced.

  The dynamic damper according to claim 2 is the dynamic damper according to claim 1, wherein the vibration isolator is a stoppered portion that is formed on the second fixture and projects outward in the radial direction of the second fixture. A stopper member that is attached to the first fixture side and that at least restricts displacement of the stopper portion in the axial direction of the second fixture; and the base member is attached to the stopper member.

  A dynamic damper according to a third aspect is the dynamic damper according to the first or second aspect, wherein the axial direction of the stator and the axial direction of the second fixture are configured in the same direction. Yes.

  A dynamic damper according to a fourth aspect is the dynamic damper according to the first or second aspect, wherein the axial direction of the stator and the axial direction of the second fixture are orthogonal to each other. Has been.

  The dynamic damper according to claim 4 and the dynamic damper according to claim 5 are different in the axial direction of the stator with respect to the axial direction of the second fixture. Therefore, both the dynamic damper according to claim 4 and the dynamic damper according to claim 5 may be attached to the vibration isolator to further improve the vibration isolating effect.

  The dynamic damper according to claim 5 is the dynamic damper according to any one of claims 1 to 4, wherein the magnetic pole portion of the mover includes at least a pair of magnets, and the pair of magnets is an axis of the stator. Magnet poles different from each other in the center direction are formed side by side, and arranged in the first direction perpendicular to the axis direction, the poles are arranged in reverse, and the magnetomotive force generated between the pair of magnets is The mover reciprocates with respect to the stator by a combination with a magnetomotive force generated by exciting the coil to attenuate the vibration of the vibration isolator.

  A dynamic damper according to a sixth aspect is the dynamic damper according to the fifth aspect, wherein the magnetic pole portion of the mover is formed so as to sandwich the stator in the first direction, and the pair of magnets is the first damper. The magnetic poles are arranged in reverse on the direction line.

  A dynamic damper according to claim 7 is the dynamic damper according to any one of claims 1 to 6, wherein the dynamic damper and the stator are connected to each other, and a connection member made of an elastic material is provided, and the connection A gap is formed between the mover and the base member in a state where the mover and the stator are connected by a member.

  The dynamic damper according to an eighth aspect of the present invention is the dynamic damper according to the seventh aspect, wherein the connecting member is configured by a leaf spring and is disposed at both ends of the movable element in the reciprocating direction of the movable element.

  The dynamic damper according to claim 9 is the dynamic damper according to claim 7 or 8, wherein the mover is disposed on both end surfaces in the reciprocating direction of the mover from an outer edge portion of the mover to the stator. A side wall standing up to a position corresponding to a mounting position of the connecting member, and a screw portion provided to fix the connecting member to the side wall and arranged in plane symmetry with respect to the axis of the stator. The connecting member is fixed by being screwed to the stator and the threaded portion of the side wall.

  The dynamic damper according to claim 10 is the dynamic damper according to claim 9, wherein the connecting member has two annular portions having the same shape, and the two annular portions are screwed to the stator. The parts are connected integrally.

  A dynamic damper according to an eleventh aspect is the dynamic damper according to the ninth or tenth aspect, wherein the connecting member is fixed to the stator and the threaded portion of the side wall in a state where the connecting member is fixed to the side wall. In the meantime, a gap wider than the operating distance when the current moves through the coil from the state where no current flows through the coil and the movable element moves in any one of the axial directions of the stator. Is formed.

  A dynamic damper according to a twelfth aspect is the dynamic damper according to any one of the seventh to eleventh aspects, wherein the dynamic damper is sandwiched between the movable element and the base member, and a gap between the movable element and the base member. And the movable element is formed with a shaft portion provided with the magnetic body and a small-diameter portion having a diameter smaller than the shaft diameter of the shaft portion. When the movable element is fixed to the base member, the member is sandwiched between the step surface of the stator formed by the shaft portion and the small diameter portion and the base member.

  A dynamic damper according to a thirteenth aspect is the dynamic damper according to the fifth or sixth aspect, wherein the opposing surfaces of the stator and the movable element are coupled and at least a part of the second damper is made of an elastic material. A gap is formed between the mover and the base member in a state where the mover and the stator are connected by the second connecting member.

  A dynamic damper according to a fourteenth aspect is the dynamic damper according to the thirteenth aspect, wherein the second connecting member is one of magnetic pole portions of the mover formed with the stator sandwiched in the first direction. A third connecting member that connects the magnetic pole portion and the stator, and a fourth connecting member that connects the other magnetic pole portion and the stator, and the third connecting member and the fourth connecting member. Is arranged symmetrically with respect to the axis of the stator in the axial direction of the stator.

  The dynamic damper according to claim 15 is the dynamic damper according to claim 13, wherein the second connecting member has a length of a magnetic body of the stator or a magnetic pole portion of the mover in an axial direction of the stator. Is formed so as to surround the entire outer wall of the magnetic body of the stator when viewed in the axial direction.

  A dynamic damper according to a sixteenth aspect is the dynamic damper according to any one of the thirteenth to fifteenth aspects, wherein the pair of magnets are formed by sandwiching the stator in the first direction. One of the magnets is disposed on the surface of the one magnetic pole portion facing the stator, and the other magnet is disposed on the surface of the other magnetic pole portion facing the stator. The second connecting member includes an elastic member made of a rubber-like elastic material connected to the magnetic body of the stator, and a resin member made of a resin material connected to the elastic member, and the magnetic property of the stator The elastic member is connected to a body, the resin member is connected to the elastic member, and the elastic member and the resin member are integrally connected to the stator. Pair of magnets Are assembled is pressed between.

  The dynamic damper according to claim 17 is the dynamic damper according to claim 16, wherein the magnetic body of the stator is formed in a columnar shape, and the resin member surrounds an outer periphery of the magnetic body formed in a columnar shape. The stator and the resin member have an axial center on the same axial center, and the pair of magnets are connected to the resin member in the axial direction of the stator. The contact surface is formed in an arc shape, and the radius of curvature of the outer periphery of the resin member is greater than the radius of curvature of the arc of the pair of magnets.

  The dynamic damper according to claim 18 is the dynamic damper according to any one of claims 1 to 17, wherein the movable member and the base member are connected to each other, and a fifth connecting member made of a rubber-like elastic material is provided. I have.

  In addition, as long as the movable element is operably attached, the portion connected to the fifth connecting member may be a portion different from the base member. For example, when a case body that covers the dynamic damper is provided in order to reduce the influence of external heat, dust, and the like, the case body and the mover may be coupled by a fifth coupling member.

  The dynamic damper according to claim 19 is the dynamic damper according to any one of claims 1 to 18, wherein the coil is fixed to the base member and the movable member is fixed to the base member. It is formed in a size having a movable allowable range wider than the movable range of the movable element in the axial direction of the stator.

  A dynamic damper unit according to claim 20, a dynamic damper according to any one of claims 1 to 19, and vibration information detection means for detecting information based on vibration of the vibration isolator to which the dynamic damper is attached, Control means for controlling at least the direction of the current flowing through the coil in accordance with information detected by the vibration information detection means, so that the mover can reciprocate in a direction in which vibration of the vibration isolator is attenuated. It is configured.

  The dynamic damper unit according to claim 21 is the dynamic damper unit according to claim 20, wherein the vibrating body is an engine that rotates and includes rotation information detection means that detects rotation information of the engine. The means stores at least an output pattern in which a relationship between the direction of the current flowing through the coil and the energization time of the coil is determined in advance, vibration information detected by the vibration information detection means, and the rotation Selection means for selecting a corresponding output pattern from the storage means based on rotation information detected by the information detection means; and output means for outputting to the coil in accordance with the output pattern selected by the selection means. I have.

  According to the dynamic damper unit of the twenty-first aspect, based on the engine rotation information detected by the rotation information detection means and the vibration information of the vibration isolator detected by the vibration information detection means, the selection means stores the storage means. A corresponding output pattern is selected. In accordance with the selected output pattern, output is performed to the coil by the output means. Therefore, since the control means can control the current flowing through the coil based on the vibration information of the support and the rotation information of the engine, the mover can be operated according to the actual state.

  23. A method of manufacturing a dynamic damper according to claim 22, wherein a base member attached to a vibration isolator, a stator fixed to the base member and including a magnetic body at least at a part of an outer periphery, and an axis of the stator A magnetic pole portion disposed at a position corresponding to the magnetic body of the stator in a direction and formed so as to sandwich the stator in a first direction orthogonal to the axial direction; and the stator One magnet is disposed on the surface of one of the magnetic pole portions facing the stator among the magnetic pole portions formed to be sandwiched, and the other magnet is disposed on the surface of the other magnetic pole portion facing the stator. And a pair of magnets arranged in a single axis along the stator and wound around the magnetic pole portion of the mover so that a current flows. And the stator excited An elastic member made of a rubber-like elastic material connected to a natural body and a resin member made of a resin material connected to the elastic member, and a gap is formed between the mover and the base member, It is a method of manufacturing a dynamic damper including a second connecting member that connects a magnetic body of the stator and a magnetic pole portion of the mover, and the elastic member is provided between the magnetic body of the stator and the resin member. A connecting step of vulcanizing and bonding a member to form a first assembly in which the magnetic body and the resin member are connected by the elastic member; and the first assembly formed by the connecting step A body is press-fitted between the pair of magnets so that the resin member comes into contact with the pair of magnets of the mover to form a second assembled body in which the resin member and the pair of magnets are fixed. A press-fitting step, and the first step formed by the press-fitting step. The stator of the assembled unit and screwed to said base member, said stator and a fixing step of forming a third set with the body secured to the base member.

  According to the method for manufacturing a dynamic damper according to claim 22, the elastic member and the resin member are integrated with the stator by vulcanizing and bonding the elastic member between the magnetic body of the stator and the resin member. A connected first assembly is formed. The first assembly is press-fitted between the magnets so that the resin member comes into contact with the magnet of the mover, thereby forming a second assembly in which the resin member and the magnet of the mover are fixed. . When the stator and the base member of the second assembly are screwed together, a third assembly in which the stator is fixed to the base member is formed. The third assembly is a dynamic damper.

  The dynamic damper manufacturing method according to claim 23 is the dynamic damper manufacturing method according to claim 22, wherein the magnetic body of the stator to which the elastic member is vulcanized and bonded in the connecting step and the resin member are: The magnetic body of the stator is formed in a cylindrical shape, and the resin member is formed in a cylindrical shape so as to surround an outer periphery of the magnetic body formed in a cylindrical shape, and the connecting step includes a shaft of the stator. When the magnetic body of the stator and the resin member are connected by the elastic member so that the core and the axis of the resin member are on the same line, and the resin member is press-fitted by the press-fitting step, The pair of magnets in contact with the resin member formed in a cylindrical shape has a contact surface with the resin member formed in an arc shape in the axial direction of the stator, and the press-fitting step A pair of The radius of curvature of the outer periphery of the resin member to be press-fitted into Issima will more arc radius of curvature of the pair of magnets.

  Here, in any one of claims 1 to 23, the axial center direction of the stator is configured such that the mover reciprocates in one direction with respect to the stator. The same direction.

  According to the dynamic damper of the first aspect, since the operation direction of the mover can be changed by changing the direction of the current flowing in the coil, the mover can be operated so that each part of the vibration isolator does not resonate. it can. Therefore, since the vibration transmitted to the vibration isolator can be attenuated and the vibration transmitted to the support body can be reduced, it is possible to reduce the decrease in the vibration isolation effect.

  In addition, if the magnitude of the current value flowing through the coil and the time during which the coil is energized are adjusted in accordance with the direction of the current flowing through the coil, the moving direction and speed of the mover can be easily adjusted. There is an effect that the vibration effect can be improved.

  In addition, since the mover, the stator, and the coil are attached to the base member in advance, the attaching process of the dynamic damper is completed only by attaching the base member to the vibration isolator. Therefore, there is an effect that the attaching process of the dynamic damper can be simplified.

  According to the dynamic damper of the second aspect, in addition to the effect produced by the dynamic damper according to the first aspect, the base member is attached to the stopper member that regulates the displacement of the stopper portion formed in the second attachment. Therefore, vibration generated in the stopper member can be absorbed. For example, the stopper member at least restricts the displacement of the stoppered portion in the axial direction of the second mounting portion, so that the stopper member covers the top and bottom of the stoppered portion in the axial direction of the second mounting tool and It arrange | positions so that a clearance gap may be formed among them. That is, the stopper member is in a state where the portion covering the stopper portion is suspended in the air. Therefore, when vibration is generated in the stopper member, particularly vibration at the tip end portion is increased, and as a result, the vibration isolation effect by the vibration isolation device is reduced. However, according to the present invention, since the dynamic damper is attached to the stopper member, the vibration of the stopper member can be absorbed, and the dynamic damper can adjust the reciprocation according to the vibration. Can be absorbed accurately. Therefore, there is an effect that it is possible to reduce a significant decrease in the vibration isolation effect of the vibration isolation device.

  According to the dynamic damper according to claim 3, in addition to the effect produced by the dynamic damper according to claim 1 or 2, the axial direction of the stator and the axial direction of the second fixture are the same direction. The reciprocating direction of the mover is the same as the axial direction of the second fixture. Therefore, the vibration of the vibration isolator generated in the axial direction of the second fixture can be reduced by the dynamic damper. Since the general vibration isolator is displaced in the axial direction of the second fixture, the vibration in the axial direction can be absorbed by the dynamic damper. Therefore, there is an effect that the vibration isolation effect of the vibration isolation device can be improved.

  According to the dynamic damper of the fourth aspect, in addition to the effect produced by the dynamic damper according to the first or second aspect, the axial direction of the stator and the axial direction of the second fixture are in directions perpendicular to each other. Therefore, the reciprocating direction of the mover is a direction perpendicular to the axial direction of the second fixture. Therefore, the vibration perpendicular to the axial direction of the second fixture can be reduced by the dynamic damper. Therefore, there is an effect that it is possible to improve the vibration isolation effect of the vibration isolation device in which the vibration transmitted to the vibration isolation device is transmitted in a direction orthogonal to the axial direction of the second fixture.

  According to the dynamic damper of the fifth aspect, in addition to the effect exhibited by the dynamic damper according to any one of the first to fourth aspects, at least a pair of magnets are provided in the magnetic pole portion, and the magnets have an axial center of the stator. Since the magnetic poles are arranged in the first direction orthogonal to the direction, the magnetomotive force is generated between the pair of magnets. Moreover, since the different magnets are arranged in the axial direction of the stator in the pair of magnets, the directions of the magnetomotive forces generated are opposite to each other. Therefore, if the magnetomotive force generated by exciting the coil is set in the same direction as the magnetomotive force generated between the magnets, the driving force for operating the mover can be increased, and the magnetomotive force generated between the magnets can be increased. If the direction is opposite, the driving force can be offset. Therefore, by changing the direction of the current flowing through the coil and changing the combination of the two magnetomotive forces, there is an effect that the reciprocating operation of the mover can be performed smoothly.

  According to the dynamic damper of the sixth aspect, in addition to the effect achieved by the dynamic damper according to the fifth aspect, the magnetic pole portion sandwiches the stator in the first direction (a direction perpendicular to the axial direction of the stator). Thus, the pair of magnets are arranged on the first direction line with the magnetic poles arranged in reverse, so that the distance between the magnetic pole portions and the distance between the pair of magnets are reduced. Therefore, since each magnetomotive force to be generated is increased and the driving force is increased, the dynamic damper for generating the predetermined driving force can be reduced in size.

  According to the dynamic damper of claim 7, in addition to the effect of the dynamic damper according to any one of claims 1 to 6, the mover and the base are connected in a state where the mover and the stator are connected by the connecting member. Since a gap is formed between the movable member and the member, the movable element floats with respect to the base member. Therefore, the resistance (friction) that interferes when the mover reciprocates is reduced. Therefore, there is an effect that the mover can be operated efficiently.

  According to the dynamic damper of the eighth aspect, in addition to the effect achieved by the dynamic damper of the seventh aspect, the connecting member is configured by a leaf spring and is disposed at both ends in the reciprocating direction of the mover. An increase in the thickness of the damper in the reciprocating direction can be reduced. Therefore, there is an effect that the dynamic damper itself can be prevented from increasing in scale.

  Moreover, since the connection member is arrange | positioned at the both ends of the needle | mover, the needle | mover and the stator are connected in two places of the reciprocation direction. Therefore, the shift | offset | difference of the operation | movement direction of a needle | mover can be reduced compared with the case where a needle | mover and a stator are connected in one place. Therefore, there is an effect that the mover can be operated more accurately and efficiently and the occurrence of failure can be reduced.

  According to the dynamic damper of the ninth aspect, in addition to the effect produced by the dynamic damper according to the seventh or eighth aspect, the connecting member is fixed by being screwed to the stator and the screw portion of the side wall. Further, since the stator and the screw portion have the same position in the reciprocating direction of the mover, and the screw portion is arranged in plane symmetry with respect to the axis of the stator, the stator and the screw portion And are located on a straight line. Therefore, since the fulcrums of the force acting on the connecting member are located at equal intervals on the straight line, it is possible to reduce the extreme force applied to a part of the connecting member, and to reduce the damage of the connecting member. There is an effect that can be done.

  According to the dynamic damper of the tenth aspect, in addition to the effect produced by the dynamic damper according to the ninth aspect, the two annular portions having the same shape are integrally connected to form a connecting member. Compared with the case where it forms from this member, there exists an effect that the workability | operativity of an assembly | attachment can be improved.

  According to the dynamic damper of the eleventh aspect, in addition to the effect produced by the dynamic damper of the ninth or tenth aspect, the current is not supplied to the coil between the connecting member and the side wall from the state where the current is not supplied to the coil. Since a gap wider than the operating distance when the mover moves in one of the axial directions of the stator is formed, even if the mover reciprocates, the mover remains in the leaf spring. It can reduce that it interferes with operation | movement by touching. Therefore, there is an effect that the mover can be operated smoothly.

  According to the dynamic damper of claim 12, in addition to the effect produced by the dynamic damper according to any of claims 7 to 11, when the mover is fixed to the base member, the shaft portion and the small diameter portion are A clamping member is clamped between the step surface of the stator to be formed and the base member. That is, the positions of the magnetic pole portions of the base member and the stator (mover relative to the base member) can be determined by the thickness of the holding member. Therefore, since the error in the fixing position of the stator is reduced for each manufactured dynamic damper, there is an effect that the reliability of the vibration isolation effect by the dynamic damper can be improved.

  According to the dynamic damper of claim 13, in addition to the effect produced by the dynamic damper of claim 5 or 6, the second connection in which the opposing surface of the mover and the stator is at least partially made of an elastic material. Since it is connected by the member, it can be reduced that foreign matter (dust etc.) enters between the mover and the stator. If a foreign object enters between the mover and the stator, the foreign object becomes an operating resistance of the mover, resulting in malfunction or failure. However, in the present invention, by connecting the opposing surfaces of the mover and the stator with the second connecting member, it is possible to reduce the intrusion of foreign matter between the mover and the stator. There is an effect that occurrence of failures can be reduced.

  Furthermore, when the opposing surfaces of the mover and the stator are connected by the second connecting member, the gap between the mover and the stator in the direction orthogonal to the axial direction of the stator is the axial center. It becomes the thickness of the 2nd connection member in the direction orthogonal to a direction, and can maintain a fixed distance. Since the mover reciprocates with respect to the stator, if the mover moves in an oblique direction away from the axial direction, the mover and the stator collide with each other, causing a failure or accurate vibration isolation. It may not be possible. However, since the gap between the mover and the stator can be maintained constant by connecting the opposing surfaces of the mover and the stator with the second connecting member, the movement of the mover in an oblique direction is reduced. Thus, the occurrence of failure can be reduced and accurate vibration isolation can be performed.

  In addition, since the gap is formed between the mover and the base member in a state where the mover and the stator are connected by the second connecting member, the mover floats with respect to the base member. Therefore, the resistance (friction) that interferes when the mover reciprocates is reduced. Therefore, there is an effect that the mover can be operated efficiently.

  According to the dynamic damper of the fourteenth aspect, in addition to the effect produced by the dynamic damper according to the thirteenth aspect, the third connecting member and the fourth connecting member are arranged at the axial center of the stator in the axial direction of the stator. Since it is arranged symmetrically with respect to the movable member, the support of the movable member by the third and fourth connecting members can be made uniform in the circumferential direction of the stator. Therefore, it is possible to reduce the movement of the mover obliquely with respect to the axial direction, to reduce the collision between the mover and the stator and to failure, and to perform accurate vibration isolation. There is an effect.

  Further, since the second connecting member that connects the opposing surfaces of the mover and the stator does not surround the entire outer wall of the stator in the axial direction of the stator, the number of second connecting members that are disposed is reduced. be able to. Therefore, the dynamic damper can be reduced in weight and the manufacturing cost can be reduced.

  According to the dynamic damper of the fifteenth aspect, in addition to the effect produced by the dynamic damper of the thirteenth aspect, in the axial direction of the stator, the length of the magnetic body of the stator or the length of the magnetic pole portion of the mover Since the second connecting member is formed longer than the shorter one of them, the opposing surface (gap) in the axial direction between the magnetic body of the mover and the magnetic pole part of the stator is filled with the second connecting member. . Further, since the second connecting member is formed so as to surround the entire outer wall of the magnetic body of the stator in the axial direction view of the stator, the stator in the first direction orthogonal to the axial direction is formed. The opposing surface between the magnetic body and the magnetic pole part of the mover is also filled with the second connecting member. That is, the opposing surface of the stator magnetic body and the magnetic pole part of the mover is filled with the second connecting member and no gap is formed, so that foreign matter enters between the magnetic body of the stator and the magnetic pole part of the mover. There is an effect that it can be surely prevented.

  In addition, since the second connecting member is formed so as to surround the entire outer wall of the stator, compared to the case where the second connecting member is formed only at a predetermined position of the stator, in the axial direction view of the stator. It is not necessary to adjust the position of the second connecting member. The position of the second connecting member in the axial direction view should be arranged symmetrically with respect to the axial center in the axial direction view of the stator so that the mover can smoothly reciprocate with respect to the stator. Is preferred. This is to reduce the movement of the mover from the axial direction. However, when the second connecting member is arranged symmetrically with respect to the shaft center in the axial direction of the stator, it is difficult to adjust the position of the second connecting member, which is a complicated manufacturing process. End up. In the present invention, since the second connecting member surrounds the entire outer wall of the magnetic body of the stator, the second connecting member can be point-symmetric with respect to the axis at any position in the circumferential direction of the stator. Therefore, the mover can be operated smoothly and efficiently, and the manufacturing process for connecting the opposing surfaces of the magnetic body of the stator and the magnetic pole portion of the mover by the second connecting member can be simplified. There is.

  According to the dynamic damper of claim 16, in addition to the effect produced by the dynamic damper of any of claims 13 to 15, the resin member and the elastic member are integrally connected to the stator, and are integrated with the stator. The dynamic damper is assembled by press-fitting the resin member coupled to the pair of magnets. One of the connecting methods using a rubber-like elastic material is vulcanization adhesion, but vulcanization adhesion is difficult to adhere to a magnet as compared to resin or metal. Therefore, when an attempt is made to directly vulcanize and bond the magnetic body of the stator and the pair of magnets using an elastic member, the incidence of defective products due to poor adhesion increases. However, since the magnetic pole part of the stator and the resin member are connected by an elastic member, the magnetic pole part of the stator and the resin member are bonded by vulcanization adhesion while reducing the occurrence of defective products due to poor adhesion. There is an effect that can be.

  Further, when directly vulcanizing and bonding the magnetic body of the stator and the magnet of the mover, a mold capable of disposing the stator and the mover is required. The structure becomes complicated, and the cost of mold production increases. However, since the magnetic body of the stator and the resin member are vulcanized and bonded, a mold in which the stator and the resin member can be arranged is sufficient, which is smaller than a mold in which the stator and the mover are arranged. It can be scaled and the structure can be simplified. Therefore, there is an effect that the cost of mold production can be reduced.

  In addition, since the resin member and the elastic member are integrally connected to the stator and then assembled by pressing the resin member between the magnets, the dynamic damper can be assembled by a simple assembly process. .

  Moreover, since a pair of magnet is arrange | positioned in the surface facing the stator of a magnetic pole part, the distance between a pair of magnets becomes short. Since the magnetic force of the magnet increases in proportion to the distance between the magnets becoming shorter, the magnetic force generated between the magnets can be increased by disposing it on the surface of the magnetic pole portion facing the stator. effective.

  According to the dynamic damper of the seventeenth aspect, in addition to the effect achieved by the dynamic damper of the sixteenth aspect, the radius of curvature of the outer periphery of the resin member is formed to be greater than the radius of curvature of the arc of the pair of magnets. For example, if the radius of curvature of the arc of the magnet is larger than the radius of curvature of the outer periphery of the resin member, the resin member and the pair of magnets cannot be fixed even if the resin member is press-fitted between the pair of magnets. When the resin member is press-fitted between the magnets, the stator may be press-fitted in a tilted state or the press-fitting position may be shifted. However, since the radius of curvature of the outer periphery of the resin member is greater than the radius of curvature of the arc of the pair of magnets, when the resin member is press-fitted between the magnets, the resin member is press-fitted along the arc of the magnet. As a result, it is possible to reduce the tilting of the stator and the displacement of the press-fit position, and it is possible to securely fix the resin member and the pair of magnets.

  In addition, since the axis of the cylindrically formed stator and the axis of the resin member formed in the cylindrical shape are on the same axis, it is not necessary to position the rotational direction of the stator when press-fitting good. Therefore, since the press-fitting operation can be performed without accurately positioning the press-fitting position of the stator, the manufacturing process can be simplified.

  Moreover, since the magnet of the stator is formed in an arc shape, it is possible to arrange a large magnet in a small space as compared with the case where the magnet is formed of a flat plate. Therefore, there is an effect that it is possible to reduce the scale while securing the magnetic force of the magnet.

  According to the dynamic damper of claim 18, in addition to the effect produced by the dynamic damper according to any of claims 1 to 17, the fifth connecting member connects the mover and the base member, and the base member prevents the dynamic damper. Since it is attached to the vibration device, the mover can be a mass member, and has the same configuration as a conventional dynamic damper. That is, it is not necessary to separately provide a mass member that becomes a weight. Therefore, it is possible to reduce the increase in size of the dynamic damper itself, and to reduce the manufacturing cost.

  In addition, since the stator is fixed to the base member and the mover is held by the base member by the fifth connecting member, it is possible to reduce the deviation of the positional relationship between the stator and the mover. Since the mover reciprocates with respect to the stator, if the mover moves in an oblique direction, the mover and the stator may collide with each other, causing a failure or failing in accurate vibration isolation. . However, by holding the mover against the base member, there is an effect that the occurrence of the above-described adverse effects can be reduced.

  In addition, when the fifth connecting member is provided, the resistance for the reciprocating motion of the mover increases, but the mover can be reliably held by the base member. In this configuration, the elastic force between the connecting member according to claim 7 and the second connecting member according to claim 13 and the fifth connecting member is set so that the moving direction of the mover is not shifted while the mover is operated efficiently. Etc. are selected. Therefore, there is an effect that the mover can be operated accurately and efficiently and the occurrence of failure can be reduced.

  According to the dynamic damper of claim 19, in addition to the effect produced by the dynamic damper according to any of claims 1 to 18, since the coil is fixed to the base member, even if the mover reciprocates, There is an effect that cutting of the electric wire connected to the coil can be reduced.

  Further, since the coil is formed so that the movable allowable range is larger than the movable range of the movable element, the movable element does not contact the coil. Therefore, there is an effect that failure of the dynamic damper can be reduced.

  According to the dynamic damper unit of the twentieth aspect, at least the direction of the current flowing in the coil is determined according to the information based on the vibration of the vibration isolator detected by the vibration information detecting means. Therefore, since the operation direction of the mover can be adjusted by the control means in accordance with the vibration state of the vibration isolator, there is an effect that accurate vibration isolation can be performed.

  According to the dynamic damper unit of the twenty-first aspect, in addition to the effect produced by the dynamic damper unit of the twentieth aspect, the control means controls the current flowing through the coil based on the vibration information of the vibration isolator and the rotation information of the engine. Since the mover can be operated according to the actual state, there is an effect that the vibration isolation effect can be further improved.

  In the dynamic damper manufacturing method according to the twenty-second aspect, in the connecting step, the elastic member is vulcanized and bonded to the magnetic body and the resin member of the stator to connect the magnetic body and the resin member. Vulcanization adhesion is difficult to bond with magnets compared to resin and metal, so when trying to directly vulcanize and bond the magnetic body and magnet of a stator with elastic members, the incidence of defective products due to poor adhesion Becomes higher. In the connecting step of the present invention, the magnetic pole part of the stator and the resin member are vulcanized and bonded by an elastic member, so that the magnetic pole part and the resin member can be reliably connected, and defective products due to poor adhesion can be obtained. There is an effect that generation can be reduced.

  Further, when directly vulcanizing and bonding the magnetic body of the stator and the magnet of the mover, a mold capable of disposing the stator and the mover is required. The structure becomes complicated, and the cost of mold production increases. However, since the magnetic body of the stator and the resin member are vulcanized and bonded, a mold in which the stator and the resin member can be arranged is sufficient, which is smaller than a mold in which the stator and the mover are arranged. It can be scaled and the structure can be simplified. Therefore, there is an effect that it is possible to reduce the cost of manufacturing the mold used in the connecting step.

  Furthermore, after the resin member and the elastic member are integrally connected to the stator, the resin member is press-fitted between the pair of magnets, so that the resin member and the magnetic pole portion of the mover can be fixed, so that a dynamic damper is manufactured. There is an effect that one of the steps can be a simple press-fitting step.

  In the dynamic damper manufacturing method according to claim 23, in addition to the effects exhibited by the dynamic damper manufacturing method according to claim 22, the radius of curvature of the outer periphery of the resin member is greater than the radius of curvature of the arc of the pair of magnets. . For example, if the radius of curvature of the arc of the magnet is larger than the radius of curvature of the outer periphery of the resin member, the resin member and the pair of magnets cannot be fixed even if the resin member is press-fitted between the pair of magnets. When the resin member is press-fitted between the magnets, the stator may be press-fitted in a tilted state or the press-fitting position may be shifted. However, since the radius of curvature of the outer periphery of the resin member is greater than the radius of curvature of the arc of the pair of magnets, when the resin member is press-fitted between the magnets, the resin member is press-fitted along the arc of the magnet. As a result, it is possible to reduce the inclination of the stator and the displacement of the press-fit position, and it is possible to securely fix the resin member and the pair of magnets. Therefore, there is an effect that the occurrence of defective products can be reduced by the press-fitting process.

  In addition, since the axis of the cylindrically formed stator and the axis of the resin member formed in the cylindrical shape are on the same axis, it is not necessary to position the rotational direction of the stator when press-fitting good. Therefore, the press-fitting process can be simplified because the press-fitting can be performed without accurately positioning the press-fitting position of the stator.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view schematically showing an attached state of an active dynamic damper (hereinafter referred to as “ACD”) 1 in one embodiment of the present invention.

  In the present embodiment, an ACD attached to a frame 13 that supports an engine 10 of an FF type automobile (hereinafter referred to as “automobile”) will be described as an ACD 1 to which the present invention is applied.

  First, the mounting state of the ACD 1 will be described. Around the ACD 1, there are an engine 10 for generating a driving force of an automobile, a mounting bracket 11 attached to the engine 10 by bolts 11a, 11b, 11c, an engine mount 12 attached to the mounting bracket 11 by bolts 12a, A frame 13 to which the engine mount 12 is attached by bolts 12b, 12c, 12d, and 12e, and an acceleration sensor 14 disposed on the frame 13 are provided. The ACD 1 is attached to the frame 13 by bolts 1a and 1b.

  The acceleration sensor 14 measures the acceleration when the frame 13 vibrates, and the ACD 1 attenuates the vibration of the frame 13 based on the acceleration measured by the acceleration sensor 14. The acceleration sensor 14 is disposed in the vicinity of the ACD 1 and is configured to perform accurate vibration isolation.

  The engine mount 12 is, for example, a liquid-filled new protection device configured to support and fix the engine 10 and not transmit vibration generated from the engine 10 to the frame 13. That is, the engine mount 12 prevents vibration generated by the engine 10 from being transmitted to the frame 13. The engine mount 12 is a rubber-like elastic material that connects a first mounting tool attached to the engine 12 side, a cylindrical second mounting tool attached to the frame 13 side, a first mounting tool, and a second mounting tool. And a vibration-proof base composed mainly of

  Next, the detailed structure of the ACD 1 will be described with reference to FIGS. FIG. 2 is a perspective view showing the external appearance of the ACD 1. 3 is a cross-sectional view of the ACD 1 and the frame 13 taken along the line III-III in FIG.

  The ACD 1 is a base plate 20 attached to the frame 13 by bolts 1 a and 1 b, and a base end (lower side in FIG. 3) is screwed to the base plate 20 by a nut 21 and is fixed to the base plate 20. A cylindrical stator 22, a magnetic body portion 23 fixed to a substantially intermediate portion in the axial direction A (vertical direction in FIG. 3) of the stator 22, and an outer periphery of the stator 22 and an axis of the stator 22 A mover 24 that can reciprocate in the central direction A, a magnetic pole part 25 that is a part of the mover 24 and that protrudes relative to the stator 22 with the stator 22 interposed therebetween, and the magnetic pole part 25 is wound around In addition, a coil 26 fixed to the base plate 20 and a connecting portion 27 for connecting the mover 24 and the base plate 20 are provided.

  The magnetic part 23 is configured by laminating a number of substantially disk-shaped metals 23a made of a magnetic metal such as an electromagnetic steel plate. Similarly, the mover 24 is configured by laminating a plurality of substantially annular (including relatively projecting projecting portions forming the magnetic pole portions 25) metal 24a made of a magnetic metal such as an electromagnetic steel plate.

  The connecting portion 27 is made of a rubber-like elastic material, and connects two opposing side walls of the mover 24 to the base plate 20 by vulcanization adhesion. In the present embodiment, the connecting portion 27 connects the two opposing side walls of the mover 24 and the base plate 20. However, the connecting portion 27 connects all the facing surfaces of the mover 24 to the base plate 20. Also good. Further, the material (for example, rubber hardness) and the size (for example, thickness and width) may be changed according to the elastic force necessary for performing vibration isolation.

  A pair of arc-shaped permanent magnets 28 is disposed at the tip of the magnetic pole portion 25 of the mover 24 (the surface facing the magnetic body portion 23 of the stator 22). The magnetic poles (S pole and N pole) of the permanent magnet 28 are configured adjacent to each other in the axial direction A of the stator 22 and have different polarities (see FIG. 6 or FIG. 7).

  The permanent magnet 28 on the left side of FIG. 3 has a permanent magnet 28a having a north pole on the side facing the magnetic body 23 on the base plate 20 side and a south pole on the opposite side (magnetic pole 25 side); There is provided a permanent magnetic pole 28b whose surface side facing the magnetic part 23 away from the base plate 20 (upper side in FIG. 3) is an S pole and whose opposite side (magnetic pole part 25 side) is an N pole. .

  On the other hand, the permanent magnet 28 on the right side of FIG. 3 has a magnetic pole 28b in which the surface facing the magnetic body portion 23 on the base plate 20 side is the S pole and the opposite surface side (the magnetic pole portion 25 side) is the N pole. There is provided a permanent magnetic pole 28a whose surface side facing the magnetic body portion 23 away from the base plate 20 (upper side in FIG. 3) is an N pole and whose opposite surface side (magnetic pole portion 25 side) is an S pole.

  Therefore, the permanent magnet 28 disposed opposite to the direction substantially perpendicular to the axial direction A (the direction of arrow B in FIG. 3) is disposed so that the magnetic poles are reversed in the direction of the arrow B. Therefore, a magnetomotive force is generated between the pair of permanent magnets 28 in the opposite direction. When the permanent magnet 28 is arranged in this manner, the magnetic body portion 23 and the magnetic pole portion 25 are magnetized to the N pole on the side facing the N pole of the permanent magnet 28 and also face the S pole of the permanent magnet 28. The side is magnetized to the S pole (see FIG. 6 or FIG. 7).

  The coils 26 disposed on the left and right sides of FIG. 3 are electrically connected to each other, and a unidirectional current flows. Further, since the coil 26 is wound around the magnetic pole portion 25, when a current is passed through the coil 26, a magnetic field is formed around the coil 26. As a result, a magnetic flux passes between the pair of permanent magnets 28 to generate a magnetomotive force. To do. In addition, since the coil 26 is being fixed to the base material 20, even if the needle | mover 24 reciprocates, it can reduce that the wiring connected to the coil 26 is disconnected.

  The coil 26 is formed in a size having an operation allowable range t1 (see FIG. 3) of the mover 24 in the axial direction A. This is because the mover 24 moves in the axial direction A while the coil 26 is fixed to the base plate 20, and the operating range t2 (see FIG. 3) of the mover 24 is ensured. It is a space for.

  Here, an electrical circuit diagram connected to the coil 26 will be described with reference to FIG. FIG. 4 is an electric circuit diagram showing the electrical connection of the ACD 1. The ACD 1 is schematically shown, and the coil 26 is shown by a simple conducting wire.

  The control unit 30 controls the direction of current flowing through the coil 26. The control unit 30 includes a CPU 31 that is an arithmetic device, a ROM 32 that stores various control programs executed by the CPU 31 and fixed value data, and various data that are stored when the control program stored in the ROM 32 is executed. A RAM 33 which is a memory for temporarily storing is mounted.

  An acceleration sensor 14 and an engine speed detection sensor 40 are connected to the input side of the control unit 30. From the acceleration sensor 14, the acceleration when the frame 13 vibrates is detected and the signal is input. From the engine speed detection sensor 40, the speed of the engine 10 is detected and the signal is input.

  On the output side of the control unit 30, an amplifier 41 that supplies current to the coil 26 is connected. When receiving an instruction from the control unit 30, the amplifier 41 changes the direction of the current or switches energization (on / off) according to the instruction.

  The ROM 32 stores a table in which an output pattern to the amplifier 41 is set in advance. In this table, an output pattern corresponding to the engine speed input from the engine speed detection sensor 40 and the acceleration input from the acceleration sensor 14 is set. The output to the amplifier 41 is information such as the direction of current flowing through the coil 26 and the energization time.

  The amplifier 41 is connected to both ends of the coil 26 and allows current to flow through the coil 26. Further, in response to an instruction from the control unit 30, the current flowing to the coil 26 is turned on / off (energization time adjustment), or the direction in which the current flows is changed.

  FIG. 4 shows a white arrow, and the direction of the white arrow indicates the direction of the magnetomotive force generated between the pair of permanent magnets 28. That is, since a magnetomotive force is generated between the permanent magnets 28 in the direction from the permanent magnet 28a to the permanent magnetic pole 28b, the directions are opposite to each other in FIG. A magnetic force is generated, and a magnetomotive force is generated from the left side to the right side in FIG.

  Next, the operation of the ACD 1 controlled by the control unit 30 will be described with reference to FIGS. FIG. 5 is a flowchart showing main processing executed by the CPU 31 of the control unit 30. FIG. 6 is an explanatory diagram showing the action of the ACD 1 when a current is passed through the coil 26 in the positive direction. FIG. 7 is an explanatory diagram showing the action of the ACD 1 when a current is passed through the coil 26 in the negative direction.

  In addition, in the cross section of the coil 26 of FIG.6 and FIG.7, "x" and "." Are shown, but this has shown the direction through which an electric current flows. That is, in FIG. 6, a current flows from the upper side to the lower side through the back side in the direction perpendicular to the paper surface. In the present embodiment, this case is assumed to be a current flowing in the positive direction. On the other hand, in FIG. 7, it is assumed that a current flows from the lower side to the upper side through the back side in the vertical direction of the paper, and a current flows in the negative direction. Further, “x” and “•” in the cross section of the magnetic pole portion 25 indicate the directions of magnetic flux generated when a current is passed through the coil 26. That is, in FIG. 6, the magnetic flux flows from the left side to the right side through the mover 24 on the back side in the vertical direction of the paper (and the front side in the vertical direction of the paper not shown), and flows from the right side to the left side through the permanent magnets 28. On the other hand, in FIG. 7, the magnetic flux flows from the right side to the left side through the movable element 24 on the vertical side of the paper surface (and the front side in the vertical direction of the paper not shown), and flows from the left side to the right side through the permanent magnets 28.

  The main process shown in FIG. 5 is started by a reset at power-on. The power-on means both a state in which a key (not shown) is operated to enter an ACC state (power supply to each device is performed) and a state in which the engine 10 is started and started. When the power is turned on, an initial setting process (not shown) accompanying the power on is executed. In this initial setting process, information (program, output pattern table, etc.) stored in the ROM 32 is read out and stored in the RAM 33.

  In the main process, first, it is determined whether or not the engine 10 is started (S101). If the engine 10 is not started (S101: No), the vehicle is stopped and vibrations from the engine 10 are not transmitted to the frame 13, so the processing of S102 to S104 for preventing vibration of the frame 13 is performed. Without proceeding to S105.

  On the other hand, if it is determined that the engine 10 is started in the process of S101 (S101: Yes), information from the engine speed detection sensor 40 and the acceleration sensor 14 is acquired (S102). As the information from the acceleration sensor 14, the acceleration when the frame 13 vibrates is input. As the information from the engine speed detection sensor 40, the speed of the engine 10 is input.

  When the acquisition of each piece of input information (engine speed and acceleration) is completed in the process of S102, an output pattern corresponding to the acquired input information is selected. The selection of the output pattern is appropriately selected from the output pattern table stored in advance in the ROM 32 described above.

  Thereafter, the amplifier 41 is instructed based on the output pattern (S104), and other processing is executed (S105). The other processes are processes for driving the automobile, but are not controlled by the ACD 1 and will not be described in detail.

  Here, the operation of the ACD 1 when an instruction is given to the amplifier 41 in the process of S104 and the amplifier 41 causes a current to flow in the positive direction or the negative direction through the coil 26 will be described with reference to FIGS.

  As shown in FIG. 6, when a positive current flows through the coil 26, a magnetic field is generated around the coil 26 in the direction of a two-dot chain line arrow. As a result, a magnetic flux passes between the permanent magnets 28, and a magnetomotive force is generated. It occurs in the direction of arrow C. In this case, the direction of the magnetomotive force of the upper permanent magnet 28 (the white arrow on the upper side in FIG. 6; the direction from the right side to the left side) and the direction of the magnetomotive force generated when a current flows through the coil 26 (arrow C in FIG. 6). In the same direction, the magnetic fluxes are combined and the magnetomotive force is increased.

  On the other hand, the direction of the magnetomotive force of the lower permanent magnet 28 (lower white arrow in FIG. 6, the left to right direction) and the direction of the magnetomotive force generated when a current is passed through the coil 26 (arrow C in FIG. 6). Is reversed, and the magnetomotive force of both is canceled and weakened. As a result, a force that attracts the stator 22 between the upper permanent magnets 28 in FIG. 6 works, and since the stator 22 is fixed, a downward force is applied to the mover 24 (black arrow in FIG. 6). Acting, the mover 24 moves downward.

  As shown in FIG. 7, when a negative current flows through the coil 26, a magnetic field is generated around the coil 26 in the direction of a two-dot chain line arrow. As a result, a magnetic flux passes between the permanent magnets 28, and a magnetomotive force is generated. Occurs in the direction of arrow D. In this case, the direction of the magnetomotive force of the lower permanent magnet 28 (the white arrow in the lower side of FIG. 7, the direction from the left side to the right side) and the direction of the magnetomotive force generated by the current flowing through the coil 26 (the arrow in FIG. 7). D) and the same direction, the magnetic flux is synthesized and the magnetomotive force is increased.

  On the other hand, the direction of the magnetomotive force of the upper permanent magnet 28 (the white arrow on the upper side in FIG. 7, the direction from the right side to the left side) and the direction of the magnetomotive force generated by the current flowing through the coil 26 (the arrow D in FIG. 7). On the other hand, the magnetomotive forces of both are offset and weakened. As a result, a force that the stator 22 is attracted between the permanent magnets 28 on the lower side of FIG. 7 works, and since the stator 22 is fixed, an upward force is applied to the mover 24 (black arrows in FIG. 7). Acts, and the mover 24 moves upward.

  As described above, by changing the direction of the current flowing through the coil 26, the mover 24 can be reciprocated in the vertical (one-axis) direction. Further, the operation direction of the mover 24 is controlled by the control device 30. That is, the control unit 30 can know the direction and magnitude of vibration of the frame 13 from the acceleration detected by the acceleration sensor 14 and operate the mover 24 in a direction to cancel the vibration of the frame 13. Can do. Therefore, vibration can be prevented according to the vibration of the frame 13. Therefore, it is possible to reduce the vibration transmitted to the interior of the automobile and to reduce the driver's discomfort.

  In addition to the input based on the vibration of the frame 13, the rotation speed of the engine 10 is input from the engine rotation speed detection sensor 40, and the operation of the mover 24 is controlled based on the rotation speed and the vibration of the frame 13. Yes. As a result, it is possible to predict vibrations that occur in accordance with the rotational speed of the engine 10, so that accurate vibration isolation can be performed.

  In particular, when the resonance frequency transmitted to the frame 13 is a distorted waveform (a waveform that is not a sine wave), it is difficult to accurately prevent vibration with a dynamic damper that does not include an actuator or a control unit that operates only in one direction. Become. However, since the ACD 1 can operate in the reciprocating direction, and the reciprocating operation can be controlled by the control unit 30 in accordance with the inputs of the engine speed detection sensor 40 and the acceleration sensor 14, it is assumed that the resonance frequency has a distorted waveform. The vibration can be also prevented. Furthermore, since the operation of the mover 24 can be changed according to the magnitude of the current value, a smooth operation can be performed as compared with an actuator using a solenoid or the like.

  Moreover, since the mover 24 serves as a substitute for the weight, it is not necessary to separately provide a mass member. In addition, a pair of permanent magnets 28 are arranged so that different magnetic poles are adjacent to each other in the axial direction A, and are arranged so that the magnetic poles are reversed in the direction of the arrow B. Since the magnetomotive force is generated between the permanent magnets 28, the mover 24 can be reciprocated without a plurality of coils or permanent magnets. Therefore, the ACD 1 itself can be reduced in size and the manufacturing cost can be reduced.

  Further, since the mover 24, the stator 22, the coil 26, and the connecting portion 27 are previously attached to the base plate 20, the attaching process of the ACD 1 is completed only by attaching the base plate 20 to the frame 13. Therefore, the attachment process of ACD1 can be simplified.

  Next, the ACD 101 attached to the engine mount 50 of the second embodiment will be described with reference to FIGS. The ACD 1 of the first embodiment is attached to the frame 13, but the ACD 101 of the second embodiment is attached to the engine mount 50. Furthermore, the ACD 1 of the first embodiment is configured such that the mover 24 is connected to the base plate 20 via the connecting portion 27, whereas the ACD 101 of the second embodiment is connected to the stator 122. The movable element 124 is connected via a spring 152. In addition, about the part same as 1st Example, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  First, the external appearance of the engine mount 50 will be described with reference to FIGS. FIG. 8 is a front view of the engine mount 50 with the ACD 101 attached. FIG. 9 is a view showing the engine mount 50 with the ACD 101 attached thereto, FIG. 9A is a top view, and FIG. 9B is a bottom view.

  The engine mount 50 is a liquid-filled vibration isolator, and mainly includes a substantially flat plate-like first mounting bracket 51 attached to the engine 10 side (see FIG. 10) and a substantially cylindrical shape attached to the frame 13 side. The formed second mounting bracket 52, the upper end portion (upper side in FIG. 8) of the second mounting bracket 52 and the first mounting bracket 51 are connected, and the vibration-proof base 53 made of a rubber-like elastic material and the second mounting bracket are connected. A protrusion 53b attached to the upper end of the metal fitting 52 and projecting radially outward of the second attachment metal 52, and a displacement in the axial direction G (see FIG. 8) of the second attachment metal of the protrusion 53b. At least a stabilizer metal fitting 58 to be regulated is provided.

  The engine mount 50 mainly reduces the vibration of the engine 10 being transmitted to the frame 13 due to the vibration-proof base 53 being displaced in the axial direction G of the second mounting bracket 52.

  Mounting bolts 54 are disposed on the upper surface (upper side in FIG. 8) of the first mounting bracket 51 and the bottom surface (lower side in FIG. 8) of the second mounting bracket 52, respectively. A positioning pin 55 for positioning the stabilizer fitting 58 is disposed on the first attachment fitting 51, and a positioning projection 57a is press-formed on the second attachment fitting 52 in a convex shape.

  An attachment bracket 80 for attaching the ACD 101 to the engine mount 50 is integrally attached to the engine mount 50 on the stabilizer fitting 58 by welding. The mounting bracket 80 is provided with two through holes (not shown), and bolts 81 and nuts 82 are screwed into two places where the through holes are formed, so that the ACD 101 is mounted. It is attached.

  Here, the outline of the engine mount 50 will be described with reference to FIG. FIG. 10 is a cross-sectional view showing a longitudinal cross section of the engine mount 50 taken along line XX of FIG. As shown in FIG. 10, the first mounting bracket 51 is formed in a substantially flat plate shape from a steel material or the like. The second mounting bracket 52 includes a cylindrical metal fitting 56 on which the vibration-proof base 53 is vulcanized and a bottom metal fitting 57 attached below the cylindrical metal fitting 56. The cylindrical metal fitting 56 is formed in a cylindrical shape having an opening extending upward, and the bottom metal fitting 57 is formed in a cup shape from a steel material or the like.

  The anti-vibration base 53 is formed from a rubber-like elastic body in a substantially truncated cone shape, and is vulcanized and bonded between the lower surface side of the first mounting bracket 51 and the upper end opening of the cylindrical bracket 56. Further, a rubber film 53a covering the inner peripheral surface of the cylindrical metal fitting 56 is connected to the lower end portion of the vibration isolating base 53, and an orifice intermediate wall 72 of an orifice metal fitting 66 to be described later is in close contact with the rubber film 53a. Has been.

  A protruding portion 53b is formed at one end (right side in FIG. 10) of the vibration-isolating base 53, and the protruding portion 53b abuts against the stabilizer bracket 58 so that a stopper action at the time of large displacement can be obtained. Has been. In addition, a part of the cylindrical metal fitting 56 is embedded in the protruding portion 53b in order to ensure the rigidity and strength.

  The diaphragm 59 is formed from a rubber-like elastic body into a rubber film shape having a partial spherical shape. As shown in FIG. 10, the diaphragm 59 is attached to the second attachment fitting 52 (between the tubular fitting 56 and the bottom fitting 57). It is attached. As a result, a liquid sealing chamber 61 is formed between the upper surface side of the diaphragm 59 and the lower surface side of the vibration isolation base 53.

  The liquid sealing chamber 61 is filled with an antifreeze liquid (not shown) such as ethylene glycol. As shown in FIG. 10, the liquid sealing chamber 61 is divided into a main liquid chamber 61A on the vibration isolating base 53 side (upper side in FIG. 10) and a sub liquid chamber on the diaphragm 59 side (lower side in FIG. 10) by a partition 62 described later. It is divided into two rooms with 61B.

  The diaphragm 59 is vulcanized and bonded to a donut-shaped mounting plate 60 in a top view, and the mounting plate 60 is caulked and fixed between a cylindrical metal fitting 56 and a bottom metal fitting 57 as shown in FIG. Thus, the second mounting bracket 52 is attached.

  As shown in FIG. 10, the partition 62 includes an elastic partition film 65 configured from a rubber-like elastic body into a substantially disk-like rubber film, and a lattice on the inner peripheral surface side that accommodates the elastic partition film 65. An orifice fitting 66 received by a wall-like wall portion 66a, and a disk-like partition plate member 67 covering the opening of the upper end (upper side in FIG. 10) of the orifice fitting 66 are configured.

  The partition plate member 67 includes a lattice-like wall portion 67a. The elastic partition film 65 is accommodated between the facing surfaces of the wall portion 67a of the partition plate member 67 and the wall portion 66a of the orifice fitting 66, and the displacement thereof is restricted from both sides. By this displacement regulation, when a large amplitude is input, the film rigidity can be increased and the damping characteristic can be improved. Further, an outer fitting cylinder portion 77 is erected on the outer peripheral portion of the partition plate member 67. The partition plate member 67 is assembled to the orifice fitting 66 by fitting the outer fitting cylinder portion 77 to the orifice fitting 66 described above.

  The elastic partition film 65 is housed in a state having a slight gap between the wall portions 66a and 67a and the like, and when the minute amplitude is input, the liquid in the liquid sealing chamber 61 is allowed to pass through the gap. Leak (leak) from the main liquid chamber 61A to the sub liquid chamber 61B (or vice versa). Due to this leak, it is possible to reduce the dynamic spring when inputting a small amplitude.

  As shown in FIG. 10, an orifice 75 is formed on the outer peripheral surface side of the orifice metal fitting 66 between the rubber film 53 a covering the inner peripheral surface of the second mounting metal fitting 52 (tubular metal fitting 56). The orifice 75 is an orifice channel that communicates the main liquid chamber 61A and the sub liquid chamber 61B. The orifice fitting 66 is formed in a substantially cylindrical shape having a shaft core O (not shown) from a metal material such as aluminum, for example.

  As shown in FIG. 10, the partition body 62 is clamped and fixed in the axial direction (vertical direction in FIG. 10) of the second mounting bracket 52 by the partition body receiving portion 53 c provided on the vibration isolation base 53 and the clamping member 68. ing. The clamping member 68 has a second cylindrical portion 74, which will be described later, fitted into the inner peripheral portion of the lower end side (lower side in FIG. 1) of the orifice fitting 66, and the outer peripheral side flat plate portion 71 is connected to the second mounting fitting 52 ( It is caulked and fixed to the cylindrical metal fitting 56 and the bottom metal fitting 57).

  Here, the partition body receiving portion 53c is formed as a step portion extending over the entire circumference on the lower surface side of the vibration isolating base 53, and locks the upper end surface of the partition body 62 at the step portion as shown in FIG. In the assembled state of the engine mount 50, the partition body receiving portion 53c is compressed and deformed, and the elastic restoring force of the partition body receiving portion 53c acts on the partition body 62 as a holding force. Thereby, the partition 62 can be clamped and fixed firmly and stably.

  As shown in FIG. 10, the second cylindrical portion 74 of the clamping member 68 is press-fitted into the inner peripheral portion on the lower end side of the orifice fitting 66, and the outer peripheral side flat plate portion 71 of the clamping member 68 is second attached. Since the metal fitting 52 (the cylindrical metal fitting 56 and the bottom metal fitting 57) is fixed by caulking, the holding member 68 and the partition body 62 are firmly held. As a result, even when a large amplitude or high frequency amplitude is input, chattering of each member can be suppressed, thereby avoiding the influence on the dynamic characteristics due to positional deviation or resonance of each member. Can do.

  Next, the ACD 101 attached to the engine mount 50 via the attachment bracket 80 will be described with reference to FIGS. 11A and 11B are views showing the appearance of the ACD 101 according to the second embodiment when the case body 102 is covered, FIG. 11A is a top view, and FIG. 11B is a front view. FIG. 11C is a bottom view.

  The ACD 101 of the second embodiment is covered with a case body 102. The case body 102 is configured by a substantially box-shaped box portion 102a having an opening on one end face, and a substantially triangular-shaped flange portion 102b connected to opposite ends on the opening side of the box portion 102a. A through hole 102c for attaching to the mounting bracket 80 by a bolt 81 and a nut 82 is formed in the flange portion 102b. In the second embodiment, the case body 102 is made of a metal material, but may be made of a resin material.

  As shown in FIG. 11C, the base plate 120 includes a main body 120a to which the stator 122 is fixed by a nut 121a, and a flange 120b formed in substantially the same shape as the flange 102b of the case body 102. And a through hole 120c drilled in the flange 120b. The base plate 120 has a main body 120a and a flange 120b with respect to the end surface of the mounting bracket 80 so that the nut 121a and the stator 122 do not interfere with the mounting bracket 80 when the ACD 101 is mounted on the mounting bracket 80. Are different in height (see FIG. 12B). That is, the flange portion 120b abuts on the end surface of the mounting bracket 80, but the main body portion 120a forms a predetermined space between the end surface of the mounting bracket 80.

  As shown in FIG. 11B, when the case body 102 is covered with the ACD 101, the flange portion 102b of the case body 102 and the flange portion 120b of the base plate 120 are covered with each other. In this case, as shown in FIG. 11A or 11C, the case body 102 is attached to the ACD 101 so that the through hole 102c of the case body 102 and the through hole 120c of the base plate 120 are in the same position. Be covered.

  Further, as shown in FIG. 11C, the case body 102 is larger than the base plate 120 in a direction substantially perpendicular to the straight line connecting the through holes 120c and 120c of the base plate 120 (vertical direction in FIG. 11C). Is formed. That is, when the case body 102 is covered with the ACD 101, substantially the entire ACD 101 is covered. Therefore, heat resistance can be increased and intrusion of dust and the like can be reduced. Accordingly, since dust or the like can be prevented from entering between the mover 124 and the stator 122, occurrence of malfunction of the mover 124 due to dust or the like can be reduced.

  Next, the structure of the ACD 101 will be described with reference to FIGS. 12A and 12B are views showing the external appearance of the ACD 101 with the case body 102 removed, FIG. 12A is a top view, and FIG. 12B is a front view. FIG. 13 is a cross-sectional view of the ACD 101 and the case body 102 taken along line XIII-XIII in FIG.

  As shown in FIG. 12A, the ACD 101 includes a base plate 120, a stator 122 fixed to the base plate 120, a magnetic body portion 123 fixed to the stator 122, and a shaft of the stator 122. A mover 124 that reciprocates in the center direction E (see FIG. 13), a magnetic pole portion 125 that is a part of the mover 124 and that protrudes relatively to the stator 122 side with the stator 122 interposed therebetween, and its magnetic pole A coil 126 wound around the portion 125 and fixed to the base plate 120, and a leaf spring 152 for connecting the movable element 124 and the stator 122 are mainly provided.

  As shown in FIG. 13, the stator 122 has a shaft portion 122 a to which the magnetic body portion 123 is fixed, and a small diameter portion 122 b that is formed with a smaller diameter than the shaft portion 122 a and at both ends of the stator 122. , 122c. Therefore, in the stator 122, step surfaces 122b1 and 122c1 are formed by the difference in diameter between the shaft portion 122a and the small diameter portions 122b and 122c.

  In the stator 122, the small diameter portion 122c (and the step surface 122c1) is on the base plate 120 side (lower side in FIG. 13), and the small diameter portion 122b (and the step surface 122b1) is opposite to the base plate 120 side (see FIG. 13) is fixed to the base plate 120. The small-diameter portions 122b and 122c are threaded with screw grooves for holding the leaf spring 152 between the nuts 121b and 121c. Further, the small-diameter portion 122c not only sandwiches the leaf spring 152 but is also screwed to the base plate 120, so that it is longer than the small-diameter portion 122b by a length necessary for screwing to the base plate 120. Has been.

  The mover 124 is formed in a substantially square shape in a top view shown in FIG. 12A, and a magnetic pole part 125 is formed so as to protrude toward the magnetic body part 123. Further, as shown in FIG. 13, the opposite surface of the magnetic pole portion 125 to the magnetic body portion 123 has a different polarity in the axial direction E (permanent magnets 128a (S pole), 128b ( The permanent magnets 128 are arranged so as to form different polarities (permanent magnets 128a (S poles), 128b (N poles)) in a direction perpendicular to the axial direction E. The movable element 124 is formed with a protruding portion 124a (see FIG. 12B) protruding outward in a straight line direction (left-right direction in FIG. 12A) connecting the through holes 120c and 120c of the base plate 120. In addition, a chamfered portion 124b (see FIG. 12B) having chamfered corners is formed.

  As shown in FIG. 12B, the outer edge portion of the mover 124 in the vertical direction (axial direction E) is provided with side walls 150 that are erected on both sides in the vertical direction. The side walls 150 on both sides in the vertical direction include a screw portion 151 that protrudes corresponding to the protrusion portion 124a of the movable element 124, and an extending portion 153 that extends in the direction of the opposite side wall 150 so as to surround a part of the chamfer portion 124b. I have. The threaded portion 151 is threaded with a thread groove (not shown) for screwing and fixing the leaf spring 152 with the screw 155. Further, since the screw portion 151 is arranged in plane symmetry with respect to the axis of the stator 122, the stator 122 and the screw portion 151 (the screw groove of the screw portion 151) in the top view shown in FIG. ) And are located on a substantially straight line.

  The extension portion 153 is inserted with screws 154 through the extension portion 153 (the upper side wall 150 in FIG. 12B) of one side wall 150 in order to integrally fix the movable element 124 and the side walls 150 on both sides in the vertical direction. And a screw groove (not shown) in which a screw 154 is screwed into the extending portion 153 of the other side wall 150 (the lower side wall 150 in FIG. 12 (b)). Is threaded. Therefore, the side walls 150 on both sides in the up-down direction are in a state where the movable element 124 is sandwiched by the screws 154 being inserted into the insertion holes of the one extending portion 153 and screwed into the screw grooves of the other extending portion 153. Firmly fixed. Further, the side walls 150 on both sides in the vertical direction are fixed at four places (four corners of the mover 124) where the chamfered portions 124b of the mover 124 are formed. A concave counterbore 153a that can accommodate the head of the screw 154 is formed in the extending portion 153 (the upper side wall 150 in FIG. 12B) in which the insertion hole is formed. Therefore, the head of the screw 154 protrudes from the end face of the side wall 150 in the direction of the leaf spring 152, thereby preventing interference with the leaf spring 152.

  As shown in FIG. 12B, leaf springs 152 are disposed at both ends of the movable element 124 in the reciprocating direction. Moreover, as shown to Fig.12 (a), the leaf | plate spring 152 has two substantially cyclic | annular forms, and is comprised integrally. The annular shape includes, as viewed in the axial direction E of the stator 122, an outer edge portion 152 a having a shape along the outer edge of the side wall 150, and a curved portion 152 b that extends from the outer edge portion 152 a so as to bend toward the stator 122. It consists of The curved portion 152b on the right side of FIG. 12 (a) and the curved portion 152b on the left side of FIG. 12 (a) are integrally connected by a connecting portion 152c (see FIG. 12 (b)) screwed to the stator 122. Yes. Since the leaf spring 152 is formed in an annular shape, the weight of the leaf spring 152 can be reduced compared to the case of using a flat leaf spring that closes the entire movable element 124 when viewed in the axial direction E. Can do. Further, since the leaf spring 152 is integrally formed, the assembling work can be simplified as compared with the case where a plurality of leaf springs are attached.

  A leaf spring 152 disposed on the side opposite to the base plate 120 (the upper side in FIG. 12B) is sandwiched between the stepped surface 122b1 of the stator 122 and the nut 121b, and the threaded portion 151 of the side wall 150. Between the screw 155 and the screw 155. A hollow member 156 formed in a hollow shape is sandwiched between the screw portion 151 and the plate spring 152, and the position of the plate spring 152 in the axial direction E is horizontal. .

  Specifically, the plate spring 152 is fixed by inserting a screw hole (not shown) of the plate spring 152 into the small diameter portion 122b and then screwing a nut 121b into the small diameter portion 122b. Further, a hollow member 156 is disposed between the side wall 150 and the leaf spring 152, and a screw 155 is inserted into a screw hole (not shown) of the leaf spring 152 and a hollow portion of the hollow member 156, and a screw groove of the screw portion 151 is inserted. Screw on. Therefore, a gap t4 (see FIG. 13) corresponding to the thickness of the hollow member 156 is formed between the leaf spring 152 and the side wall 150.

  The leaf spring 152 on the base plate 120 side (the lower side in FIG. 12B) is a small diameter of the screw portion 151, the screw 155, and the stator 122, like the leaf spring 152 disposed on the opposite side of the base plate 120 side. It is fixed by the part 122c and the nut 121c.

  As described above, the fixed position of the leaf spring 152 is horizontal in the axial direction E of the stator 122, and the stator 122 and the screw portion 151 are linear in the direction orthogonal to the axial direction E. Therefore, when the leaf spring 152 is elastically deformed, the fulcrums on which the elastic force acts are equally spaced. Therefore, since an excessive force is not applied only to a part of the leaf spring 152, damage to the leaf spring 152 can be reduced.

  Here, the positional relationship between the mover 124 and the base plate 120 will be described. As shown in FIG. 13, a gap t <b> 3 is formed between the mover 124 and the base plate 120. The gap t3 is formed substantially equal to the thickness of the nut 121c.

  The stator 122 and the base plate 120 are fixed by connecting the stator 122 and the movable element 124 with a plate spring 152 and then inserting the small diameter portion 122c of the stator 122 into a screw hole (not shown) of the base plate 120. Then, the nut 121a is screwed to the small diameter portion 122c. The nut 121a is screwed by tightening the nut 121a to a position where the nut 121c contacts the base plate 120.

  Therefore, the leaf spring 152 is fixed so that the stepped surfaces 122b1 and 122c1 of the stator 122 are in contact with each other. Therefore, the fixing position of the stator 122 and the mover 124 in the axial direction E is determined, and the nut 121c is used as the base plate. Since it is fixed so as to contact with 120, the position of the stator 122 and the base plate 120 in the axial direction E is determined. Accordingly, the position of the stator 122 and the mover 124 and the position of the base plate 120 and the mover 124 (gap t3) can be reduced in the assembling process from product to product. However, it is possible to prevent the reliability of the product from being lowered.

  Next, the operation of the leaf spring 152 will be described. When the movable element 124 reciprocates in the axial direction E of the stator 122, the leaf spring 152 is elastically deformed in the axial direction E along with the movement. As shown in FIG. 13, the operating distance t <b> 5 when the current is passed through the coil 126 from the state where no current is passed through the coil 126 and the mover 124 moves in any one of the axial directions E. Thus, the gap t4 formed between the side wall 150 and the leaf spring 152 is configured wider. Therefore, when the mover 124 reciprocates and the leaf spring 152 is elastically deformed, the side wall 150 does not come into contact with the leaf spring 152. In addition, as described in the first embodiment, the movable allowable range t1 formed between the coil 126 and the movable element 124 and the movable range t2 of the movable element 124 are in a relationship of t2 <t1, so that the movable range t2 is movable. The child 124 does not contact the coil 126. Therefore, the operation of the mover 124 can be performed smoothly.

  As described above, in the ACD 101 of the second embodiment, the movable element 124 and the stator 122 are connected by the leaf spring 152, and the gap t3 is formed between the movable element 124 and the base plate 120. Therefore, resistance (friction) that interferes when the mover 124 reciprocates is reduced. Therefore, since the mover 124 can be operated efficiently and smoothly, when vibration occurs in the stabilizer fitting 58, the mover 124 is operated smoothly according to the vibration to absorb the vibration of the stabilizer fitting 58. can do. Therefore, the resonance of at least the stabilizer fitting 58 among each part of the engine mount 50 (such as the vibration isolating base 53, the partition body 62, and the stabilizer fitting 58) can be suppressed, so that the vibration damping effect of the engine mount 50 is prevented from being significantly reduced. can do.

  Further, since the leaf spring 152 is disposed on the opposite end surfaces of the movable element 124 in the reciprocating direction, for example, the movable element 124 is reciprocated as compared with the case where the leaf spring 152 is disposed only on one side. It is possible to reduce the movement from the operation direction in an oblique direction. Therefore, it can be reduced that the movable element 124 collides with the stator 122 and the ACD 101 is damaged.

  Further, when the acceleration sensor 14 is attached to the stabilizer bracket 58, the control by the control unit 30 is the same as in the first embodiment, so the vibration direction and magnitude of the stabilizer bracket 58 can be determined from the acceleration detected by the acceleration sensor 14. The mover 124 can be operated in a direction in which the vibration of the stabilizer fitting 58 can be attenuated. Therefore, the same effect as the first embodiment can be obtained.

  Next, a third embodiment will be described with reference to FIG. In the first embodiment, the movable element 24 and the base plate 20 are connected by a connecting portion 27, and in the second embodiment, the movable element 124 and the stator 122 are connected by a leaf spring 152. It was configured as follows. In contrast, in the ACD 201 of the third embodiment, the movable element 124 and the stator 122 are connected by a leaf spring 152, and the movable element 124 and the base plate 120 are connected by a connecting portion 227 made of a rubber elastic material. It is connected. Since the ACD 201 of the third embodiment has a configuration in which the configuration of the connecting portion 227 is added to the ACD 101 of the second embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

  FIG. 14 is a sectional view showing a longitudinal section of the ACD 201 and the cover body 102 of the third embodiment. As shown in the drawing, a leaf spring 152 and a plate 252 are sandwiched between the hollow member 156 on the base plate 120 side and the screw 155. The plate 252 is formed so as to extend in the outward direction of the side wall 150 (the left-right direction in FIG. 14), and the tip portion and the base plate 120 are connected by a connecting portion 227 made of a rubber-like elastic material.

  Although not shown, the plate 252 is formed in substantially the same length as the length of the side wall 150 in the longitudinal direction (perpendicular to the plane of FIG. 14) of the side wall 150 provided with the screw portion 151. Further, the connecting portion 227 is formed to be approximately equal to the length of the plate 252 in the longitudinal direction. Therefore, since the movable element 124 and the base plate 120 are connected to each other by the connecting portion 227 in the side wall 150 having four sides, the movable element 124 can be stably held.

  Moreover, when the connection part 227 is provided, the resistance force when the needle | mover 124 reciprocates will become large. Therefore, in the third embodiment, the elastic force of the leaf spring 152 and the connecting portion 227 is selected in advance so that the movable element 124 can reciprocate efficiently and the movable element 124 can be stably held.

  The plate 252 may be formed so as to correspond to the four sides of the side wall 150, and the connecting portion 227 may be provided on the four sides. With this configuration, since the movable element 124 and the base plate 120 are connected by the four sides, the movable element 124 can be held more stably.

  As described above, the ACD 201 of the third embodiment not only connects the mover 124 and the stator 122 by the leaf spring 152 but also connects the mover 124 and the base plate 120 by the connecting portion 227. Yes. As described above, the ACD 101 including the leaf spring 152 of the second embodiment can operate the movable element 124 efficiently. Further, since the connecting portion 227 is provided, the movable element 124 can be operated efficiently and the movable element 124 can be reliably held with respect to the base plate 120. In the third embodiment, since the axial direction E of the stator 122 is substantially perpendicular to the axial direction G of the second mounting bracket 52 of the engine mount 50, the axial direction E of the stator 122 is It is horizontal with respect to the frame 13. In this configuration, the movable element 124 may be inclined in the direction of the frame 13 (vertically below) due to its own weight, and a smooth operation may not be performed and accurate vibration isolation may not be performed. However, since the movable part 124 can be reliably held by providing the connecting portion 227, it is possible to reduce the inclination of the movable part 124 and to perform accurate vibration isolation.

  Next, an ACD 301 according to the fourth embodiment will be described with reference to FIGS. The ACD 1 of the first embodiment is configured such that the mover 24 is connected to the base plate 20 via the connecting portion 27, whereas the ACD 301 of the fourth embodiment is connected to the stator 322 and the connecting portion 352. The movable element 324 is connected via the. In addition, about the part same as 1st Example, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIGS. 15A and 15B are views showing the appearance of the ACD 301 of the fourth embodiment when the case body 302 is covered, FIG. 15A is a top view, and FIG. 15B is a front view. FIG. 15C is a bottom view. Since the case body 302 and the base material 320 of the fourth embodiment are configured in the same manner as the case body 102 and the base material 120 of the second embodiment, detailed description thereof will be omitted. Further, since the ACD 301 of the fourth embodiment uses a rubber-like elastic material, the influence on the rubber-like elastic material can be reduced by being covered with the case body 302.

  Next, the structure of the ACD 301 will be described with reference to FIGS. FIGS. 16A and 16B are views showing the appearance of the ACD 301 with the case body 302 removed, FIG. 16A being a top view, and FIG. 16B being a front view. 17 is a cross-sectional view showing a cross section of the ACD 301 and the case body 302, and FIG. 17A is a vertical cross-sectional view of the ACD 301 and the case body 302 along the line XVIIa-XVIIa in FIG. FIG. 17B is a cross-sectional view of the ACD 301 and the case body 302 taken along the line XVIIb-XVIIb in FIG.

  The ACD 301 includes a base plate 320 that is screwed to the mounting bracket 80, a stator 322 that is fixed to the base plate 320, a magnetic body portion 323 that is fixed to the stator 322, and an axial direction of the stator 322. F (see FIG. 17A), a mover 324 that reciprocates, a magnetic pole portion 325 that is a part of the mover 324 and that protrudes relatively to the stator 322 with the stator 322 interposed therebetween, A coil 326 that winds the magnetic pole portion 325 and is fixed to the base plate 320, and a connecting portion 352 that connects the contact surfaces of the magnetic pole portion 325 of the mover 324 and the magnetic body portion 323 of the stator 322 are mainly used. I have. In addition, ACD301 is comprised so that the clearance gap t3 may be formed between the base board 320 and the needle | mover 324 (refer FIG.16 (b)).

  The stator 322 is formed in a substantially cylindrical shape, and the magnetic body portion 323 is formed by laminating a large number of substantially disk-shaped metals made of a magnetic metal such as an electromagnetic steel plate as in the first embodiment. Therefore, the magnetic body portion 323 is also formed in a substantially cylindrical shape like the stator 322, and its axis is located on the same axis as the axis of the stator 322.

  The connecting portion 352 is connected to the magnetic body portion 323 of the stator 322, and includes an elastic portion 352a made of a rubber-like elastic material, and a resin portion 352b made of a resin material, connected to the outer peripheral surface of the elastic portion 352a. Yes. As shown in the longitudinal sectional view of FIG. 17A, the connecting portion 352 is formed to have a length substantially equal to the length of the magnetic body portion 323 in the axial direction F of the stator 322. Further, as shown in the cross-sectional view of FIG. 17B, the connecting portion 352 is formed so as to surround the entire outer periphery of the magnetic body portion 323 when viewed in the axial direction F of the stator 322. Further, the elastic part 352a and the resin part 352b are formed so that the thickness of the magnetic part 323 of the stator 322 in the radial direction is substantially uniform. Therefore, the axis of the connecting portion 352 is on the same axis as the axis of the stator 322. That is, the stator 322, the magnetic body portion 323, and the connecting portion 352 are all formed with a substantially uniform thickness in the radial direction.

  In the ACD 301 of the fourth embodiment, the magnetic part 323 of the stator 322 and the resin part 352b are connected by vulcanizing and bonding the elastic part 352a. In the step of connecting the magnetic body part 323 and the resin part 325b, the stator 322 and the resin part 352b in a state where the magnetic body part 323 is fixed are arranged at a predetermined interval in a specially manufactured mold. Then, a semi-lived (or liquid) rubber-like elastic material is poured into the gap between the magnetic part 323 and the resin part 352b, and the connection is performed by cooling.

  The mover 324 is formed in a substantially quadrangular shape when viewed from above (see FIG. 16A as viewed perpendicular to the paper surface), and a magnetic pole portion 325 protrudes toward the magnetic body portion 323. Further, as shown in FIG. 17A, the opposite surface of the magnetic pole portion 325 to the magnetic body portion 323 has a different polarity (permanent magnet 328a (S pole)) in the axial direction F as in the first embodiment. , 328b (N pole)) and permanent magnets 328 are arranged so as to form different poles (permanent magnets 328a (S pole), 328b (N pole)) in a direction substantially perpendicular to the axial direction F. .

  As shown in FIG. 17B, since the contact surface of the permanent magnet 328 with the resin portion 352b is formed in an arc shape, the connecting portion 352 includes the magnetic body portion 323 of the stator 322 and the mover 324. The surface facing the magnetic pole portion 325 is connected without a gap. Therefore, foreign matters do not enter between the magnetic body portion 323 and the magnetic pole portion 325, so that foreign matter enters the opposing surface, causing the mover 324 to malfunction or break down. Can be prevented. Further, the permanent magnet 328 is formed in an arc shape, so that a large permanent magnet can be disposed in a small space as compared with the case where a flat permanent magnet is disposed. Therefore, it is possible to reduce the scale while securing the magnetic force of the permanent magnet 328.

  Next, a manufacturing process of the ACD 301 will be described with reference to FIG. 18A and 18B are views for explaining the manufacturing process of the ACD 301. FIG. 18A is a perspective view showing a state in which the connecting portion 352 is integrally connected to the stator 322, and FIG. FIG. 18 is a diagram for explaining a press-fitting process of the stator 322 and the movable element 324, and FIG. 18C is a diagram for explaining a fixing process of the stator 322 and the base member 320.

  First, the manufacturing process of ACD301 performs the connection process which connects the stator 322 and the connection part 352 integrally. As described above, this connecting step is performed, for example, by vulcanization adhesion. A state where the stator 322 and the connecting portion 352 are integrally connected is a state shown in FIG. The outer diameter of the resin portion 352b of the connecting portion 352 is L1 as shown in FIG. 18B, and the radius of curvature is R1 (not shown).

  Next, a press-fitting process for press-fitting the stator 322 with the connecting portion 352 integrally connected between the magnetic pole portions 325 of the mover 324 will be described. The mover 324 is formed by previously laminating a number of substantially annular metals (including relatively projecting protrusions that form the magnetic pole part 325) made of a magnetic metal such as an electromagnetic steel plate, and the opposing surfaces of the magnetic pole part 325. Permanent magnets 328 are disposed on the respective sides. The inner diameter formed by the arcs of the permanent magnets 328 arranged to face each other is L2 as shown in FIG. 18B, and the radius of curvature is R2 (not shown).

  Here, the diameter L1 (curvature radius R1) of the resin portion 352b and the diameter L2 (curvature radius R2) between the permanent magnets 328 are formed substantially equal to each other, and when the stator 322 is press-fitted into the mover 324, The outer peripheral surface of the resin portion 352a and the facing surface of the permanent magnet 328 are in contact with each other. In the press-fitting process, since the resin portion 352b and the permanent magnet 328 are fixed, the diameter L2 is configured to be slightly smaller than the diameter L1.

  In the press-fitting process, for example, the mover 324 is set on the base side of a press-fitting machine (not shown), and the stator 322 with the connecting portion 352 integrally connected is set on the press-fitting side of the press-fitting machine. On the base side of the press-fitting machine, a protruding portion protruding in the space between the opposing permanent magnets 328 is formed, and the press-fitted stator 322 abuts on the protruding portion, so that the position adjustment in the axial direction F is performed. Is called. Therefore, since the stator 322 and the mover 324 can be fixed by using a general press-fitting machine, a rubber-like elastic member is provided between the magnetic part 323 of the stator 322 and the magnetic pole part 325 of the mover 324. Compared with the case of vulcanizing and bonding with a material, the manufacturing process can be simplified. Further, in the case where the magnetic body portion 323 of the stator 322 and the magnetic pole portion 325 of the mover 324 are vulcanized and bonded with a rubber-like elastic material, the structure of the mold becomes complicated and the mold becomes large. However, since the fixing is performed by the press-fitting process described above, a large-sized and complicated mold is not necessary, and the manufacturing cost can be reduced.

  As described above, since the stator 322, the magnetic body portion 323, and the connecting portion 352 are all formed substantially uniformly in the radial direction from the axis of the stator 322, in the press-fitting process, the stator 322 There is no need for circumferential positioning. Therefore, it is possible to simplify the press-fitting process when press-fitting a resin part 352b described later between the magnetic pole parts 325 of the mover 324.

  Next, a fixing process for fixing the stator 322 in a state where the resin portion 352b and the permanent magnet 328 are fixed to the base material 320 will be described. The adhering step is performed by inserting the tip of the stator 322 into a hole formed in the central portion of the main body 320a of the base member 320 and screwing the nut 321 into the hole. At this time, a gap t3 (see FIG. 16B) is formed in the axial direction F between the base member 320 and the mover 324. Note that the coil 326 is fixed to the base material 320 in a process before and after the fixing process between the stator 322 and the base material 320.

  The ACD 301 is manufactured through the above steps.

  As described above, in the ACD 301 of the fourth embodiment, the opposing surfaces of the magnetic pole part 325 of the mover 324 and the magnetic part 323 of the stator 322 are connected by the connecting part 352, and the mover 324 and the base are connected. Since the gap t3 is formed with the plate 320, resistance (friction) that interferes when the mover 324 reciprocates is reduced. Therefore, since the mover 324 can be operated efficiently and smoothly, when vibration occurs in the stabilizer fitting 58, the mover 324 is operated smoothly according to the vibration to absorb the vibration of the stabilizer fitting 58. can do. Therefore, the resonance of at least the stabilizer fitting 58 among each part of the engine mount 50 (such as the vibration isolating base 53, the partition body 62, and the stabilizer fitting 58) can be suppressed, so that the vibration damping effect of the engine mount 50 is prevented from being significantly reduced. can do.

  In addition, since no gap is formed between the opposing surfaces of the magnetic body portion 323 of the stator 322 and the magnetic pole portion 325 of the mover 324 by the connecting portion 352, foreign matter enters the gap and the operation of the mover 324 is performed. It is possible to prevent the occurrence of defects or failures.

  Further, when the acceleration sensor 14 is attached to the stabilizer bracket 58, the control by the control unit 30 is the same as in the first embodiment, so the vibration direction and magnitude of the stabilizer bracket 58 can be determined from the acceleration detected by the acceleration sensor 14. The mover 324 can be operated in the direction in which the vibration of the stabilizer fitting 58 can be attenuated. Therefore, the same effect as the first embodiment can be obtained.

  Next, a fifth embodiment will be described with reference to FIG. In the first embodiment, the movable member 24 and the base member 20 are connected to each other by the connecting portion 27. In the fourth embodiment, the magnetic pole portion 325 of the movable member 324 and the magnetic body portion 323 of the stator 322 are configured. The opposing surface is connected by a connecting part 352. In contrast, in the ACD 401 of the fifth embodiment, the opposing surfaces of the magnetic pole part 325 of the mover 324 and the magnetic body part 323 of the stator 322 are connected by the connecting part 352, and the mover 324 and the base plate 320 are connected. Are connected by a connecting portion 427 made of a rubber elastic material. Since the ACD 401 of the fifth embodiment has a configuration in which the configuration of the connecting portion 427 is added to the ACD 301 of the fourth embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

  FIG. 19 is a longitudinal sectional view showing a cross section of the ACD 401 and the cover body 302 of the fifth embodiment. As shown in the figure, the base member 320 and the mover 324 are connected by a connecting portion 427 made of a rubber-like elastic material.

  Although not shown, the connecting portion 427 is formed to have substantially the same length in the longitudinal direction of the mover 324 (the direction perpendicular to the paper surface of FIG. 19). Therefore, since the movable element 324 and the base plate 320 are connected to each other on the two opposing sides of the movable element 324 having four sides by the connecting portion 427, the movable element 324 can be stably held.

  Note that the connecting portion 427 may be formed so as to correspond to the four sides of the mover 324. With this configuration, the mover 324 can be held more stably.

  As described above, the ACD 401 of the fifth embodiment not only connects the magnetic pole portion 325 of the mover 324 and the magnetic body portion 323 of the stator 322 by the connecting portion 352 but also the mover 324 by the connecting portion 427. And the base plate 320 are connected. Therefore, the mover 324 can be efficiently operated, and the mover 324 can be reliably held with respect to the base material 320. In the fifth embodiment, since the axial direction F of the stator 322 is substantially perpendicular to the axial direction G of the second mounting bracket 52 of the engine mount 50, the axial direction F of the stator 322 is the same. Is in the horizontal direction with respect to the frame 13. In this configuration, the mover 324 may be inclined in the direction of the frame 13 (vertically below) due to its own weight, and a smooth operation may not be performed and accurate vibration isolation may not be performed. However, since the movable part 324 can be reliably held by providing the connecting portion 427, it is possible to reduce the inclination of the movable part 324 and perform accurate vibration isolation.

  Next, a sixth embodiment will be described with reference to FIG. In the second to fifth embodiments, the axial directions E and F of the stators 122 and 322 are substantially perpendicular to the axial direction G of the second mounting bracket 52 of the engine mount 50. The sixth embodiment is configured such that the axial direction E of the stator 122 is the same as the axial direction G of the second mounting bracket 52 of the engine mount 50. The ACD attached to the engine mount 50 of the sixth embodiment is the same ACD 101 as that of the second embodiment. Further, since the sixth embodiment is different only in the mounting direction of the ACD 101, the same portions are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 20 is a front view of the engine mount 50 with the ACD 101 of the sixth embodiment attached thereto.

  The attachment bracket 580 of the sixth embodiment is formed in a flat plate shape, and one end thereof is attached to the stabilizer fitting 58 by welding. The mounting bracket 580 has two through holes (not shown), and bolts 81 and nuts 82 are screwed into two places where the through holes are drilled, whereby the ACD 101 is mounted. It is attached.

  As shown in FIG. 20, since the ACD 101 is mounted on the flat mounting bracket 580, the axial direction E of the stator 122 is the same as the axial direction G of the second mounting bracket 52 of the engine mount 50. Direction.

  Therefore, the mover 124 reciprocates in the same direction as the axial direction G of the second mounting bracket 52 of the engine mount 50. That is, the vibration of the stabilizer fitting 58 can be absorbed by operating the mover 124 in a direction that cancels the vibration generated in the axial direction G of the second attachment fitting 52. Therefore, the resonance of at least the stabilizer fitting 58 among each part of the engine mount 50 (such as the vibration isolating base 53, the partition body 62, and the stabilizer fitting 58) can be suppressed, so that the vibration damping effect of the engine mount 50 is prevented from being significantly reduced. can do.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed.

  For example, in each of the above embodiments, the ACD 1 is attached to the frame 13 that supports the engine 10, and the ACDs 101, 201, 301, 401 are attached to the engine mount 50. It is good also as what attaches 201,301,401. For example, the ACD may be attached to the support that supports the seat on which the driver is seated to reduce the transmission of vibration to the seat, or the ACD may be attached to the support that supports the steering wheel, and the vibration is transmitted to the steering wheel. It is good also as what reduces.

  In the above embodiments, the coils 26, 126, and 326 are attached and fixed to the base plates 20, 120, and 320. However, the coils 26, 126, and 326 are attached to the movers 24, 124, and 324. The movable elements 24, 124, and 324 may be configured to operate together. In this case, since the masses of the coils 26, 126, and 326 are added when the masses of the movers 24, 124, and 324 are necessary, it is possible to prevent the ACDs 1, 101, 201, 301, and 401 from becoming large-scale. Can do. Further, when the coils 26, 126, and 326 are attached to the movers 24, 124, and 324 and operate together, the coils 26, 126, and 326 may be directly wound around the magnetic pole portions 25, 125, and 325. .

  In each of the above embodiments, the output pattern is selected based on the acceleration detected by the acceleration sensor 14 and the rotation speed of the engine 10 detected by the engine rotation speed detection sensor 40. Information may be set, other information may be set based on the rotation speed, and an output pattern may be selected from a plurality of information.

  In each of the above embodiments, the cross sections of the stators 22, 122, and 322 in the directions substantially orthogonal to the axial directions A, E, and F are configured to be substantially quadrangular, but the cross section is circular. It may be a polygon. That is, as long as the positional relationship between the stators 22, 122, 322 and the movers 24, 124, 324 is not changed, the outer shape of the movers 24, 124, 324 may be any shape.

  In the third and fifth embodiments, the movable elements 124 and 324 and the base plates 120 and 320 are connected by the connecting portions 227 and 427. However, the movable elements 124 and 324 are connected in the axial directions E and F. Therefore, the case body 102, 302 and the mover 124, 324 may be connected by a connecting portion, as long as the movable member 124, 324 can be held. .

  In the fourth and fifth embodiments, the connecting portion 352 surrounds the entire circumferential direction of the stator 322. However, the connecting portion is disposed only in a portion corresponding to the magnetic pole portion 325 of the mover 324. It is good as a thing. With this configuration, even if the entire circumferential direction of the stator 322 is not surrounded by the coupling portion 352, the coupling portion is point-symmetric with respect to the axis of the stator 322 in the axial direction F of the stator 322. Arranged. Therefore, since the connecting portion is arranged point-symmetrically with respect to the axis of the stator 322, the support by the connecting portion of the mover 324 can be made substantially uniform in the circumferential direction of the stator 322. Therefore, it is possible to reduce the movement of the mover 324 in an oblique direction with respect to the axial direction F, to reduce the failure of the mover 324 and the stator 322 to collide with each other, and to provide accurate vibration isolation. It can be carried out. Further, when the connecting portion is disposed point-symmetrically with respect to the axis of the stator 322 in the axial direction F of the stator 322, an elastic force for holding the mover 324 with respect to the stator 322, and The point of action of the elastic force for the mover 324 to move with respect to the stator 322 is point-symmetric with respect to the axis of the stator 322. Here, for example, when the point of action of the elastic force of the connecting portion is not point-symmetric (asymmetric) with respect to the axis of the stator 322, the elastic force of the two connecting portions in the axial direction F of the stator 322 is seen. The line that passes through the point of action and the axis is not on a straight line. Therefore, when the mover 324 operates, the mover 324 moves in an oblique direction with respect to the axial direction F, and the mover 324 and the stator 322 collide with each other to cause a failure or perform accurate vibration isolation. There may not be. However, when the point of action of the elastic force of the connecting portion is located point-symmetrically with respect to the axis (that is, the point of action and the axis of action of the elastic force of the two connecting portions are in a straight line when viewed in the axial direction F). Therefore, it is possible to reduce the movement of the mover in an oblique direction with respect to the axis, thereby reducing the occurrence of a failure and performing accurate vibration isolation.

  Moreover, although ACD101-401 shown in the said 2nd-6th Example shall be attached to the engine mount 50, it is good also as what attaches ACD1 of 1st Example to the engine mount 50. FIG. In this case, the ACD 1 may be provided with a case body, or the shape of the base material may be the same as that shown in the second to fifth embodiments.

  In the second to sixth embodiments, the ACD is mounted on the first mounting bracket 51 side to absorb the vibration generated in the stabilizer bracket 58 of the engine mount 50. The mounting brackets 80 and 580 may be provided to attach the ACD so as to absorb the vibration on the second mounting bracket 52 side. Further, the ACD may be mounted on both the first mounting bracket 51 side and the second mounting bracket 52 side, or the mounting direction of the ACD may be mounted according to the displacement direction of the vibration isolation base 53.

  In the first embodiment, the ACD 1 is attached to the frame 13 that supports the engine 10 of the FF type vehicle. However, the ACD 1 is attached to the frame that supports the engine of the FR type vehicle, the RR type vehicle, or the MR type vehicle. It is also good. In the second to sixth embodiments, the ACDs 101, 201, 301, and 401 are attached to the engine mount 50 that connects the engine 10 and the frame 13 of the FF type automobile. It is good also as what is attached to the engine mount with which a motor vehicle or MR type motor vehicle is equipped. That is, for the purpose of suppressing vibration, the ACD can be attached regardless of the difference in the specifications of the automobile (for example, the outer shape, the drive system, and the position of the engine).

  In this embodiment, the processing of S103 of FIG. 5 corresponds to the dynamic damper unit selection means described in claim 21, and the processing of S104 of FIG. 5 corresponds to the output means of the dynamic damper unit described in claim 21. Is applicable.

  The following are modifications of the dynamic damper and the dynamic damper unit. A base member that is attached to a support member that supports the vibrating body, a stator that is fixed to the base member and includes a magnetic body at least in part, and a reciprocating motion in one axial direction along the stator. A mover having a magnetic pole portion formed at a position corresponding to the magnetic body of the stator, a link member connecting the mover and the base member, and a connecting member made of a rubber-like elastic material; and the mover And a coil that is excited when a current flows, and the movable element reciprocates with respect to the stator by a magnetomotive force generated when the current is passed through the coil and excited. Then, the dynamic damper A1 is characterized in that the vibration of the vibrating body is attenuated.

  In the dynamic damper A1, the magnetic pole portion of the mover includes at least a pair of magnets, and each magnet is formed with different magnetic poles arranged in the reciprocating direction of the mover and substantially orthogonal to the reciprocating direction. The movable element is arranged by a combination of a magnetomotive force generated between the pair of magnets and a magnetomotive force generated by exciting the coil. A dynamic damper A2 that reciprocates with respect to the stator to attenuate the vibration of the vibrating body.

  In the dynamic damper A2, the magnetic pole portion of the mover is formed so as to sandwich the stator in the first direction, and the pair of magnets are arranged with the arrangement of the magnetic poles reversed on the first direction line. Dynamic damper A3 characterized by being made.

  According to the dynamic damper according to any one of the dynamic dampers A1 to A3, vibration information detecting means for detecting information based on the vibration of the support to which the dynamic damper is attached, and information detected by the vibration information detecting means And a control unit that controls at least the direction of the current flowing through the coil. The dynamic damper unit is configured to reciprocate the mover in a direction in which vibration of the support is attenuated. B1.

  In the dynamic damper unit B1, the vibrating body is an engine that rotates and includes rotation information detection means that detects rotation information of the engine, and the control means includes at least a direction of a current flowing through the coil and the coil. Based on storage means for storing in advance an output pattern in which a relationship with the energization time is determined, vibration information detected by the vibration information detection means, and rotation information detected by the rotation information detection means, A dynamic damper unit B2 comprising: selection means for selecting a corresponding output pattern from the storage means; and output means for outputting to the coil in accordance with the output pattern selected by the selection means.

It is the perspective view which showed roughly the attachment state of the active dynamic damper in one Example of this invention. It is the perspective view which showed the external appearance of the active dynamic damper. It is sectional drawing of the active dynamic damper and flame | frame in the III-III line of FIG. It is the electric circuit diagram which showed the electrical connection of the active dynamic damper. It is the flowchart which showed the main process performed by CPU of a control part. It is explanatory drawing which showed the effect | action of the active dynamic damper at the time of flowing an electric current through a coil to a positive direction. It is explanatory drawing which showed the effect | action of the active dynamic damper at the time of flowing an electric current through a coil to a negative direction. It is a front view of the engine mount in the state where the active dynamic damper was attached. It is the figure which showed the engine mount in the state where the active dynamic damper was attached, (a) is a top view, (b) is a bottom view. It is sectional drawing which showed the longitudinal cross-section of the engine mount in the XX line of Fig.9 (a). It is the figure which showed the external appearance of the state which covered the case body on the active dynamic damper of 2nd Example, (a) is a top view, (b) is a front view, (c) is It is a bottom view. It is the figure which showed the external appearance of the active dynamic damper in the state where the case body was removed, (a) is a top view, (b) is a front view. It is sectional drawing of the active dynamic damper and case body in the XIII-XIII line | wire of FIG. It is sectional drawing which showed the longitudinal cross-section of the active dynamic damper and cover body of 3rd Example. It is the figure which showed the external appearance of the state which covered the case body on the active dynamic damper of 4th Example, (a) is a top view, (b) is a front view, (c) is It is a bottom view. It is the figure which showed the external appearance of the active dynamic damper in the state where the case body was removed, (a) is a top view, (b) is a front view. It is sectional drawing which showed the cross section of an active dynamic damper and a case body, (a) is a longitudinal cross-sectional view of the active dynamic damper and case body in the XVIIa-XVIIa line | wire of Fig.15 (a), (b) FIG. 16 is a cross-sectional view of the active dynamic damper and the case body taken along line XVIIb-XVIIb in FIG. It is a figure explaining the manufacturing process of the active dynamic damper of 4th Example, (a) is the perspective view which showed the state by which the connection part was integrally connected with the stator, (b) is a stator. It is a figure for demonstrating the press injection process of a needle | mover, and (c) is a figure for demonstrating a stator, a base material, and an adhering process. It is the longitudinal cross-sectional view which showed the cross section of the active dynamic damper and cover body of 5th Example. It is a front view of an engine mount in the state where the active dynamic damper of the 6th example was attached.

Explanation of symbols

1 Active dynamic damper (ACD, dynamic damper, part of dynamic damper unit)
10 Engine (vibrating body)
13 Frame (support)
14 Acceleration sensor (vibration information detection means)
20, 120, 320 Base plate (base member)
22, 122, 322 Stator 23, 123, 323 Magnetic body (magnetic body)
24, 124, 324 Movers 25, 125, 325 Magnetic pole portions 26, 126, 326 Coils 27, 227, 427 Connecting portions (fifth connecting member)
28, 128, 328 Permanent magnet (a pair of magnets)
30 Control unit (part of control means)
32 ROM (storage means)
40 Engine speed detection sensor (rotation information detection means)
41 Amplifier (part of control means)
50 Engine mount (anti-vibration device)
51 First mounting bracket (first mounting bracket)
52 Second mounting bracket (second mounting bracket)
53 Anti-vibration substrate (vibration-proof substrate)
53b Protruding part (stopped part)
58 Stabilizer bracket (stopper member)
59 Diaphragm 61 Liquid enclosure (liquid enclosure)
61A Main liquid chamber (first liquid chamber)
61B Secondary liquid chamber (second liquid chamber)
62 Partition (partition plate)
75 Orifice 121c Nut (Clamping member)
122a Shaft (stator shaft)
122b, 122c Small diameter part (small diameter part of stator)
122b1, 122c1 step surface (step surface formed by the shaft portion and the small diameter portion)
150 Side wall 151 Screw part 152 Leaf spring (connecting member)
152a Outer edge part (a part of the annular part)
152b Curved part (part of the annular part)
152c articulated part (part screwed to the stator)
352 connecting portion (second connecting member, third connecting member, fourth connecting member)
352a Elastic part (elastic member)
352b Resin part (resin member)
A, E, F Axial direction (axial direction of stator, reciprocating direction of mover)
B direction (first direction) substantially orthogonal to the axial direction
C, D Magnetomotive force direction G Axial direction (axial direction of the second fixture)
R1 radius of curvature (curvature radius of the outer periphery of the resin member)
R2 radius of curvature (curvature radius of arc of magnet)
t1 Operation allowable range (movable allowable range wider than the movable range of the mover)
t2 Operating range (movable range of the mover)
t3 gap (gap between the mover and the base member)
t4 gap (gap wider than the operating distance when the mover moves in one of the axial directions of the stator)
t5 Operating distance (Operating distance when the mover moves to one of the axial directions of the stator)

Claims (23)

A rubber-like elastic material that connects a first attachment attached to the vibrating body, a cylindrical second attachment attached to a support that supports the vibrating body, and the first attachment and the second attachment. An anti-vibration base comprising: a diaphragm which is attached to the second fixture and forms a liquid enclosure chamber between the anti-vibration base; and the liquid enclosure chamber is a first liquid chamber on the anti-vibration base side. In a dynamic damper attached to a vibration isolator having a partition plate for partitioning with the diaphragm-side second liquid chamber, and an orifice for communicating the first liquid chamber and the second liquid chamber,
A base member attached to at least one of the first fixture side or the second fixture side;
A stator fixed to the base member and having a magnetic body at least partially;
A mover that is disposed so as to be reciprocally movable in the direction of one axis along the stator and has a magnetic pole portion formed at a position corresponding to the magnetic body of the stator;
A coil that is wound around the magnetic pole portion of the mover and is excited when a current flows;
A dynamic damper, wherein the mover reciprocates with respect to the stator by a magnetomotive force generated when a current is passed through the coil and excited to attenuate the vibration of the vibration isolator. The anti-vibration device includes a stopper portion that is formed on the second fixture and extends radially outward of the second fixture, and an axial direction of the second fixture that is attached to the first fixture side. A stopper member for restricting at least displacement of the stopper portion in
The dynamic damper according to claim 1, wherein the base member is attached to the stopper member.   The dynamic damper according to claim 1 or 2, wherein the axial direction of the stator and the axial direction of the second fixture are configured to be the same direction.   The dynamic damper according to claim 1, wherein the axial direction of the stator and the axial direction of the second fixture are configured to be orthogonal to each other. The magnetic pole portion of the mover includes at least a pair of magnets,
The pair of magnets are formed with different magnetic poles arranged side by side in the axial direction of the stator, and arranged with the magnetic poles arranged in the first direction orthogonal to the axial direction,
A combination of a magnetomotive force generated between the pair of magnets and a magnetomotive force generated when the coil is excited causes the mover to reciprocate with respect to the stator, thereby vibrating the vibration isolator. The dynamic damper according to claim 1, wherein the dynamic damper is damped. The magnetic pole portion of the mover is formed so as to sandwich the stator in the first direction,
6. The dynamic damper according to claim 5, wherein the pair of magnets are arranged with the arrangement of magnetic poles reversed on the first direction line. While connecting the mover and the stator, comprising a connecting member made of an elastic material,
The gap is formed between the mover and the base member in a state where the mover and the stator are connected by the connecting member. Dynamic damper.   The dynamic damper according to claim 7, wherein the connecting member is configured by a leaf spring and is disposed at both ends of the mover in a reciprocating direction of the mover. The mover includes a side wall erected from an outer edge portion of the mover to a position corresponding to an attachment position of the connecting member of the stator, on both end surfaces in the reciprocating direction of the mover, and the side wall A screw portion provided to fix the connecting member, and arranged in plane symmetry with respect to the axis of the stator;
The dynamic damper according to claim 7 or 8, wherein the connecting member is fixed by being screwed to the stator and a screw portion of the side wall.   The said connection member has two annular parts of the same shape, and the two said annular parts are integrally connected in the part screwed by the said stator. Dynamic damper.   In a state where the connecting member is fixed to the stator and the threaded portion of the side wall, a current flows through the coil from a state where no current flows through the coil between the connecting member and the side wall. 11. The dynamic damper according to claim 9, wherein a gap wider than an operating distance when the mover is operated in any one of axial directions of the stator is formed. A sandwiching member sandwiched between the mover and the base member and having a thickness corresponding to a gap between the mover and the base member;
The movable element is formed with a shaft portion provided with the magnetic body and a small-diameter portion having a smaller diameter than the shaft diameter of the shaft portion,
The clamping member is clamped between the base member and the step surface of the stator formed by the shaft portion and the small diameter portion when the movable element is fixed to the base member. The dynamic damper according to any one of claims 7 to 11, wherein: A second connecting member that connects opposing surfaces of the stator and the mover and at least a part of which is made of an elastic material;
7. The gap according to claim 5, wherein a gap is formed between the mover and the base member in a state where the mover and the stator are connected by the second connecting member. Dynamic damper. The second connecting member is a third connecting member that connects one of the magnetic pole portions and the stator among the magnetic pole portions of the mover formed with the stator sandwiched in the first direction; A fourth connecting member for connecting the other magnetic pole part and the stator,
The third connecting member and the fourth connecting member are arranged point-symmetrically with respect to the axis of the stator when viewed in the axial direction of the stator. Dynamic damper.   The second connecting member is formed to be longer than the shorter one of the length of the magnetic body of the stator or the length of the magnetic pole portion of the mover in the axial direction of the stator, The dynamic damper according to claim 13, wherein the dynamic damper is formed so as to surround the entire outer wall of the magnetic body of the stator in the axial direction view. In the pair of magnets, one of the magnets is arranged on a surface of the one magnetic pole portion facing the stator among the magnetic pole portions of the mover formed with the stator sandwiched in the first direction. And the other magnet is disposed on the surface of the other magnetic pole portion facing the stator,
The second connecting member includes an elastic member made of a rubber-like elastic material connected to a magnetic body of the stator, and a resin member made of a resin material connected to the elastic member,
The elastic member is connected to the magnetic body of the stator, the resin member is connected to the elastic member, and the elastic member and the resin member are integrally connected to the stator, The dynamic damper according to any one of claims 13 to 15, wherein the resin member is assembled by being press-fitted between the pair of magnets. The magnetic body of the stator is formed in a cylindrical shape, and the resin member is formed in a cylindrical shape so as to surround the outer periphery of the magnetic body formed in a cylindrical shape, and the shaft center of the stator and the resin member The axis is on the same axis,
In the pair of magnets, the contact surface with the resin member is formed in an arc shape in the axial direction of the stator, and the radius of curvature of the outer periphery of the resin member is the arc of the pair of magnets. The dynamic damper according to claim 16, wherein the dynamic damper is formed to have a radius of curvature or more.   The dynamic damper according to any one of claims 1 to 17, further comprising a fifth connecting member configured to connect the movable element and the base member and made of a rubber-like elastic material.   The coil is fixed with respect to the base member, and is movable between the movable element and the movable element in a state where the coil is fixed to the base member and wider than the movable range of the movable element in the axial direction of the stator. The dynamic damper according to claim 1, wherein the dynamic damper is formed in a size having a range. A dynamic damper according to any one of claims 1 to 19,
Vibration information detecting means for detecting information based on vibration of the vibration isolator to which the dynamic damper is attached;
Control means for controlling at least the direction of the current flowing through the coil in accordance with the information detected by the vibration information detecting means;
A dynamic damper unit configured to reciprocate the mover in a direction in which vibration of the vibration isolator is attenuated. The vibrator is an engine that is driven to rotate,
A rotation information detecting means for detecting rotation information of the engine;
The control means includes
Storage means for storing in advance an output pattern in which a relationship between at least the direction of current flowing in the coil and the energization time of the coil is determined;
Selection means for selecting a corresponding output pattern from the storage means based on vibration information detected by the vibration information detection means and rotation information detected by the rotation information detection means;
21. The dynamic damper unit according to claim 20, further comprising output means for outputting to the coil in accordance with an output pattern selected by the selection means. A base member attached to the vibration isolator, a stator that is fixed to the base member and includes a magnetic body at least at a part of the outer periphery, and a position corresponding to the magnetic body of the stator in the axial direction of the stator And a magnetic pole portion formed so as to sandwich the stator in a first direction orthogonal to the axial direction, and one of the magnetic pole portions formed so as to sandwich the stator A pair of magnets having one magnet disposed on a surface of the magnetic pole portion facing the stator and the other magnet disposed on a surface of the other magnetic pole portion facing the stator. A mover disposed so as to be capable of reciprocating in one axial direction along the stator, a coil wound around the magnetic pole portion of the mover and excited when a current flows, and a magnetism of the stator An elastic member made of a rubber-like elastic material connected to the body and the front And a magnetic member of the stator and a magnetic pole portion of the mover so that a gap is formed between the mover and the base member. A dynamic damper manufacturing method comprising a second connecting member to be connected,
The elastic member is vulcanized and bonded between the magnetic body of the stator and the resin member to form a first assembly in which the magnetic body and the resin member are connected by the elastic member. A connecting step;
The first assembly formed by the connecting step is press-fitted between the pair of magnets so that the resin member contacts the pair of magnets of the mover, and the resin member and the pair of magnets A press-fitting step for forming a second assembly to which is fixed;
A fixing step in which the stator of the second assembly formed by the press-fitting step is screwed to the base member to form a third assembly in which the stator is fixed to the base member. A method of manufacturing a dynamic damper, comprising: The magnetic body of the stator to which the elastic member is vulcanized and bonded in the connecting step and the resin member are formed such that the magnetic body of the stator is formed in a cylindrical shape and the magnetic body is formed in a cylindrical shape. The resin member is formed in a cylindrical shape so as to surround the outer periphery of
In the connecting step, the magnetic body of the stator and the resin member are connected by the elastic member so that the axis of the stator and the axis of the resin member are on the same line,
When the resin member is press-fitted in the press-fitting step, the pair of magnets that come into contact with the resin member formed in a cylindrical shape are in contact with the resin member in the axial direction of the stator. Is formed in a circular arc shape, and the curvature radius of the outer periphery of the resin member press-fitted between the pair of magnets in the press-fitting step is equal to or greater than the curvature radius of the arc of the pair of magnets. Item 22. A method for manufacturing a dynamic damper according to Item 22.

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