JP2006300317A - Vibration absorbing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration absorbing device having sufficient vibration absorbing effects. <P>SOLUTION: The vibration absorbing device comprises a vibrating means 110 mounted on a body frame BF, an outer cylinder 140 mounted on an underbody member, and a vibration absorbing base 150 connecting the vibrating means 110 to the outer cylinder 140. The vibrating means 110 drives a yoke member 124 in both directions of an outward motion process and a homeward motion process with the excitation of a coil 126. The yoke member 124 is reciprocated in the direction of cancelling input vibration to produce sufficient vibration absorbing effects. The exciting frequency of the coil 126 is properly changed to produce vibration absorbing effects in a desired frequency region. As a result, vibration to be transmitted from the underbody member to the body frame BF is sufficiently reduced, and so the transmission of the vibration into a vehicle room is suppressed to improve quietness and ride comfort. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an anti-vibration device interposed between a suspension member and a vehicle body frame, and more particularly to an anti-vibration device that can sufficiently obtain an anti-vibration effect.

  The body mount is widely used as a buffer body that is interposed between a vehicle body frame and an underbody member of an automobile and reduces vibration transmitted from the underbody member to the vehicle body frame.

This type of conventional body mount (anti-vibration device) is, for example, disclosed in Japanese Patent Laid-Open No. 4-327033, with an inner cylinder fixed to a vehicle body frame and a space outside the inner cylinder. A cylindrical outer cylinder, and an anti-vibration base composed of a rubber-like elastic body that connects the inner cylinder and the outer cylinder, and is provided in a cylindrical holder provided on the suspension member. By press-fitting the cylinder, it is attached so as to be interposed between the body frame and the suspension member (Patent Document 1).
Japanese Unexamined Patent Publication No. 4-327033

  By the way, in recent years, a liquid-filled body mount (liquid-filled vibration-proof device) configured by connecting the first and second liquid chambers with an orifice is also used in order to exert a further vibration-proof effect. ing. According to this, the vibration damping function and the vibration insulating function can be achieved by the fluid flow effect (liquid column resonance effect) between the two liquid chambers by the orifice and the vibration damping effect of the vibration isolation base.

  However, even in the above-described liquid-filled vibration isolator, the fluid flow effect between the two liquid chambers by the orifice is exhibited only in a predetermined resonance frequency (and its peripheral frequency) region, and other frequencies. It is not demonstrated in the area. That is, it is not possible to obtain a sufficient anti-vibration effect in a wide frequency range. Further, the vibration isolation effect itself due to the fluid flow effect described above was insufficient. Therefore, the vibration transmitted from the suspension member to the vehicle body frame cannot be sufficiently reduced, and there is a problem that the vibration is transmitted to the vehicle interior, resulting in a decrease in quietness and riding comfort. .

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vibration isolator capable of sufficiently obtaining a vibration isolating effect.

  In order to achieve this object, a vibration isolator according to claim 1 is provided with a vibration device attached to a vehicle body frame side, and a cylindrical shape arranged on the outside of the vibration device with an interval and attached to a suspension member side. And an anti-vibration base composed of a rubber-like elastic body that connects the outer cylinder and the vibration device, and the vibration device is inserted with the shaft-shaped member of the vehicle body frame. A stator that is fixed to the vehicle body frame and has a magnetic body at least in part, and a magnetic pole portion that is disposed at a position corresponding to the magnetic body of the stator, and that can reciprocate in a direction along the shaft-shaped member. A movable element configured and coupled to the vibration isolation base, a coil wound around the magnetic pole portion of the movable element and excited by flowing current, and the stationary element and the movable element are coupled and fixed. Magnetic body of child and magnetic pole of said mover A pair of connecting members opposed to each other, the pair of connecting members being formed in a cylindrical shape and having an outer ring member having a rolling element rolling groove on an inner peripheral side, and a rolling element rolling groove of the outer ring member A linear guide mechanism that linearly moves in the axial direction of the stator by being guided by the stator through the rolling elements loaded in the rolling element rolling grooves. In addition, the outer peripheral side of the outer ring member is internally fitted and held by the mover, and the mover is driven in both the forward movement process and the backward movement process by exciting the coil and generating a magnetomotive force. It is configured to be able to.

  The vibration isolator according to claim 2 is the vibration isolator according to claim 1, wherein the magnetic pole portion of the mover includes at least a pair of magnets, and the pair of magnets differs in a reciprocating direction of the mover. The magnetic poles are arranged adjacent to each other, and are arranged with the arrangement of the magnetic poles reversed in the direction orthogonal to the reciprocating direction of the mover, and the magnetomotive force generated between the pair of magnets and the coil The movable element is configured to be driven in both the forward movement process and the backward movement process in combination with a magnetomotive force generated by excitation.

  The anti-vibration device according to claim 3 is the anti-vibration device according to claim 2, wherein the magnetic pole portion of the mover faces the stator in the direction perpendicular to the reciprocating direction of the mover, The pair of magnets are opposed to each other with the magnetic body of the stator sandwiched in a direction orthogonal to the reciprocating direction of the mover, and the magnetic poles are reversed so that the opposing magnetic poles are different from each other Thus, it is arranged on the magnetic pole part of the mover.

  The vibration isolator according to claim 4 is the vibration isolator according to claim 2 or 3, wherein a plurality of the pair of magnets are arranged in a reciprocating direction of the mover.

  The anti-vibration device according to claim 5 is the anti-vibration device according to any one of claims 1 to 4, wherein the anti-vibration base protrudes from an end surface on one end side and is annularly formed along the movable element. The vehicle body frame comprising: a first lip-shaped lip formed; and a second lip-shaped ridge projecting from an end face on the other end side and formed in an annular shape along the mover. In the mounted state, the first lip portion is in contact with the stopper surface on the vehicle body frame side, and the second lip portion is in contact with a stopper surface provided on the distal end side of the shaft-shaped member, The first lip portion and the second lip portion are compressed and deformed.

  An anti-vibration device according to claim 6 is the anti-vibration device according to any one of claims 1 to 5, wherein an inner disk portion that is fitted and held on an outer peripheral side of the stator, and an inner periphery of the mover A pair of sealing members each having an outer disk part that is fitted and held on the side, and a connecting elastic body that connects the inner disk part and the outer disk part and is formed of a rubber-like elastic body, A pair of sealing members are disposed at positions facing each other with the pair of connecting members interposed therebetween.

  The vibration isolator according to claim 7 is the vibration isolator according to any one of claims 1 to 6, wherein the movable element is formed in a cylindrical shape longer in the axial direction of the stator than the magnetic pole portion. The magnetic pole portion includes a yoke member formed to project from the inner peripheral side toward the magnetic body of the stator, and the coupling member is fitted and held on the inner peripheral side of the yoke member, and the vibration-proof base Is connected to the outer peripheral side of the yoke member.

  The vibration isolator according to claim 8 is the vibration isolator according to any one of claims 1 to 6, wherein the movable element is formed in a cylindrical shape that is longer in the axial direction of the stator than the magnetic pole portion. The magnetic pole portion includes a yoke member formed so as to penetrate the inner peripheral side and the outer peripheral side, the coupling member is fitted and held on the inner peripheral side of the yoke member, and the vibration-proof base is the magnetic pole portion It is connected to the outside.

  According to the vibration isolator of the first aspect, the movable element is electrically driven in both the forward movement process and the backward movement process by exciting the coil and generating a magnetomotive force. By reciprocating the mover in the direction to cancel the vibration, the vibration-proof effect can be sufficiently exhibited. In addition, by appropriately changing the frequency for exciting the coil and reciprocating the mover at a desired frequency, it is possible to exhibit a vibration isolation effect in a desired frequency region. As a result, vibrations transmitted from the suspension members to the vehicle body frame can be sufficiently reduced. However, such vibrations can be suppressed from being transmitted to the vehicle interior, and quietness and riding comfort can be improved. There is an effect that can be done.

  Here, according to the present invention, as described above, since the coil is excited to generate a magnetomotive force, the mover is electrically driven in both the forward movement process and the backward movement process. There is an effect that the delay in the rise of the force (output) generated by the reciprocating motion of the mover can be reduced.

  For example, in a structure in which the vibration device is configured as a solenoid type and the mover is electrically driven in the forward movement process while the mover is mechanically restored by an elastic restoring force such as a coil spring in the backward movement process, Since the elastic force must be resisted at the initial stage of the moving process, the rise of the force generated in the vibration isolator is delayed by that amount, and the magnitude of this delay is determined for each forward process. There is a problem that it tends to vary. In the backward movement process, there is a problem in that vibration cannot be accurately absorbed because the force decreases rapidly and the time change curve of the force does not become smooth.

  On the other hand, according to the vibration isolator of the present invention, the coil can be excited to generate a magnetomotive force, so that the mover can be electrically driven in both forward and backward movement steps. There is an effect that the delay in the rise of the force can be reduced. Thus, for example, when a sinusoidal alternating current is applied to the coil as an example, the time change curve of the force is made a sinusoidal curve corresponding to the sinusoidal curve (that is, a curve representing the time change of the current value in the sinusoidal alternating current). Therefore, vibration can be reduced accurately.

  In addition, according to the vibration isolator of the present invention, a pair of connecting members for connecting the mover and the stator are provided, and the pair of connecting members are formed in a cylindrical shape and are rolling element rolling grooves on the inner peripheral side. The outer ring member has a large number of rolling elements loaded in the rolling element rolling grooves of the outer ring member, and is fixed by being guided to the stator via the rolling elements loaded in the rolling element rolling grooves. Since it is configured to function as a linear guide mechanism that linearly moves in the axial direction of the child, the reciprocating motion of the mover can be smoothly performed while maintaining an appropriate distance (clearance) between the mover and the stator. There is an effect that it can be done.

  That is, since the connecting member as the linear guide mechanism (slide ball bearing) is configured to use the stator as a slide shaft, when the mover reciprocates with respect to the stator, The movement of the mover in the direction along the direction (forward movement and backward movement) can be guided and the movement of the mover in the direction perpendicular to the axis of the stator can be regulated. The interval (clearance) between the two can be maintained with high accuracy. As a result, it is possible to improve and stabilize the output of the vibration exciter.

  In addition, the pair of connecting members use the stator as a slide shaft, and the outer ring side of the outer ring member is fitted and held in the mover, and are opposed to each other with the magnetic body portion of the stator and the magnetic pole portion of the mover interposed therebetween. Therefore, the pair of connecting members closes the opening of the vibration exciter to block communication between the internal structure (that is, the movable part or the electrical configuration) and the outside. be able to. As a result, the reliability of the vibration exciter can be avoided by avoiding, for example, malfunctions caused by the entry of foreign matter into the clearance between the stator and the mover, and electrical shorts caused by the ingress of rainwater, etc. There is an effect that it is possible to improve.

  Further, as described above, the outer ring member is configured to be held by press-fitting (internally fitting) the outer ring side to the mover. It can be simplified. Therefore, there is an effect that it is possible to reduce the component cost and the assembly cost, and to reduce the product cost of the vibration isolator as a whole. In addition, while simplifying the structure, the function of sealing the internal structure by closing the opening of the vibration exciter described above can be surely exhibited, so that foreign matter can enter the internal structure. There is an effect that it can be effectively suppressed.

  Here, in the present invention, a cylindrical outer cylinder is disposed outside the vibration exciter, and the vibration exciter and the outer cylinder are connected by a vibration isolating base. In addition, it is possible to reduce the weight of the vibration isolator as a whole, and to secure the volume of the vibration isolator base, and to improve the durability and the vibration damping effect of the vibration isolator base.

  That is, a configuration different from that of the present invention, for example, an inner cylinder through which the shaft-like member of the vehicle body frame is inserted is provided separately, and a vibration exciter is arranged outside the inner cylinder to prevent the inner cylinder and the vibration exciter. In the case where the structure is connected by the vibration base, the volume of the vibration isolation base disposed on the inner side cannot be secured, and the durability and the vibration damping effect due to the vibration isolation base are reduced. Due to the increase in the size of the vibration device disposed in the structure, there arises a problem that the weight of the vibration isolation device as a whole increases. On the other hand, in the present invention, such a problem can be solved by adopting the above-described configuration.

  According to the vibration isolator of claim 2, in addition to the effect of the vibration isolator according to claim 1, the magnetic pole portion of the mover includes at least a pair of magnets, and the pair of magnets is in the reciprocating direction of the mover. Are arranged adjacent to each other, and the magnetic poles are arranged in the direction perpendicular to the reciprocating direction of the mover, so that they are opposite to each other between the pair of magnets. Magnetomotive force in the direction can be generated.

  Thus, when a current in the positive direction is passed through the coil, one of the two directions of magnetomotive force generated between the pair of magnets is the direction of the magnetomotive force generated by exciting the coil. The magnetomotive force (that is, magnetic flux) of both is synthesized, and the direction of the other magnetomotive force of the two directions is opposite to the direction of the magnetomotive force generated by exciting the coil. Thus, the magnetomotive force (magnetic flux) of the two is canceled out. As a result, a force in the direction 1 is applied to the mover, and the mover is driven in the 1 direction (for example, the direction of the forward movement process) with respect to the stator.

  Similarly, when a current in the opposite direction is passed through the coil, the direction of the other magnetomotive force in the two directions is the same as the direction of the magnetomotive force generated by exciting the coil. A magnetomotive force (that is, a magnetic flux) is synthesized, and one of the two directions of the magnetomotive force is opposite to the direction of the magnetomotive force generated by exciting the coil. Magnetic flux) is canceled out. As a result, a force opposite to the direction 1 acts on the mover, and the mover is driven in a direction opposite to the direction 1 (for example, the direction of the backward movement process) with respect to the stator. .

  That is, by reversing the direction of the current that excites the coil in the forward and reverse directions, the force acting on the mover can be changed in the forward and reverse directions, that is, the mover is moved in both the forward and backward movement steps. There is an effect that it can be reciprocated. In this way, by using a combination of the magnetomotive force generated between the pair of magnets and the magnetomotive force generated by exciting the coil to drive the mover, the output is larger. There is an effect that a vibration device (vibration isolation device) can be obtained.

  According to the vibration isolator of claim 3, in addition to the effect of the vibration isolator according to claim 2, the magnetic pole portion of the mover faces the stator in the direction perpendicular to the reciprocating direction of the mover. The pair of magnets face each other across the stator magnetic body in a direction orthogonal to the reciprocating direction of the mover, and the arrangement of the magnetic poles is reversed so that the opposing magnetic poles are different from each other Therefore, since the magnetomotive force generated between the pair of magnets and the magnetomotive force generated by exciting the coil can be generated most efficiently. is there. As a result, there is an effect that the output of the vibration exciter can be improved. Further, the vibration output device can be reduced in size while improving the output of the vibration control device, and the size and weight of the vibration isolation device as a whole can be reduced accordingly.

  According to the vibration isolator according to claim 4, in addition to the effect of the vibration isolator according to claim 2 or 3, a plurality of the above-mentioned pair of magnets are arranged in the reciprocating direction of the mover. Therefore, for example, at the initial position (1 W state) in the mounting state on the vehicle, the relative position of the mover (magnet) relative to the stator (magnetic pole part) has occurred due to the weight variation of each member. Even in such a case, such misalignment can be absorbed. As a result, since the pair of magnets can be opposed to the positions sandwiching the fixed magnetic body, as described above, the magnetomotive force generated between the pair of magnets and the magnetomotive force generated by exciting the coil are There is an effect that the movable member can be reliably and stably driven by the generation.

  According to the vibration isolator of claim 5, in addition to the effect of the vibration isolator according to any one of claims 1 to 4, the first lip portion projects from the end face on one end side of the vibration isolator base. The second lip portion protrudes from the end surface on the other end side of the vibration isolating base, and when mounted on the vehicle body frame, the first lip portion is brought into contact with the stopper surface on the vehicle body frame side and the second lip portion Since the first lip portion and the second lip portion are compressed and deformed by abutting against a stopper surface provided on the distal end side of the shaft-like member, the first lip portion and the second lip The opening of the vibration exciter can be closed by the part, and as a result, the inside of the vibration exciter (that is, the movable part or the electrical configuration) can be sealed to prevent communication with the outside. There is an effect that can be done.

  As a result, it acts synergistically with the sealing effect of the pair of connecting members described above, and malfunctions due to the entry of foreign matter into the clearance between the stator and the mover, and electrical shorts due to the entry of rainwater, etc. Can be effectively avoided, and the reliability of the vibration exciter can be further improved accordingly. At the same time, it is possible to avoid malfunction due to entry of foreign matter into the movable part of the coupling member (such as the sliding surface between the stator and the rolling element) and decrease in durability. The reliability can be further improved.

  Further, since the first lip portion and the second lip portion are formed along the mover, that is, at a position corresponding to the mover, the first lip portion and the second lip portion are mounted in the body frame. The two lip portions can be firmly pressed against the stopper surface by the mover. Thereby, there exists an effect that the compression state of a 1st lip | rip part and a 2nd lip | rip part can be maintained reliably, and the sealing effect mentioned above can be exhibited stably.

  Further, since the first lip portion and the second lip portion are formed on the end face of the vibration isolating substrate, the first lip portion and the second lip portion can be formed integrally and simultaneously with the vibration isolating substrate. There is an effect. Thereby, compared with the case where the case corresponding to a 1st lip | rip part and a 2nd lip | rip part is provided separately from an anti-vibration base | substrate in order to acquire the sealing effect mentioned above, there exists an effect that manufacturing cost can be reduced. is there.

  According to the vibration isolator of claim 6, in addition to the effect of the vibration isolator according to any of claims 1 to 5, the pair of sealing members are opposed to each other with the connecting member interposed therebetween, that is, fixed. The pair of sealing members are disposed on both ends in the axial direction of the child, and the inner disk part is fitted and held on the outer peripheral side of the stator, and the outer disk part is on the inner peripheral side of the mover. Since the inner fitting is held and these are connected by a connecting elastic body, the opening of the vibration exciter is securely sealed by the pair of connecting members, and the internal structure (that is, the movable part or the electric Communication) and the outside can be blocked.

  As a result, it acts synergistically with the sealing effect of the pair of connecting members described above, and malfunctions due to the entry of foreign matter into the clearance between the stator and the mover, and electrical shorts due to the entry of rainwater, etc. Can be effectively avoided, and the reliability of the vibration exciter can be further improved accordingly. At the same time, it is possible to avoid malfunction due to entry of foreign matter into the movable part of the coupling member (such as the sliding surface between the stator and the rolling element) and decrease in durability. The reliability can be further improved.

  Further, as described above, the sealing member is configured to connect the outer periphery of the inner disk part and the inner periphery of the outer disk part with a connecting elastic body. By deforming the connecting elastic body in the shear direction, its deformation resistance can be reduced, and the reciprocating movement of the mover can be performed smoothly. As a result, the output of the vibration exciter is improved and the output is stabilized. There is an effect that can be achieved.

  According to the vibration isolator of claim 7, in addition to the effect of the vibration isolator according to any of claims 1 to 6, the vibration isolator is formed in a cylindrical shape longer in the axial direction of the stator than the magnetic pole portion. In addition, since the mover includes a yoke portion formed by extending the magnetic pole portion from the inner peripheral side toward the magnetic body of the stator, a coil is provided between the outer peripheral side of the stator and the inner peripheral side of the yoke member. There is an effect that it is possible to form a closed space for housing the. As a result, due to the sealing effect of the pair of connecting members, there is an effect that the occurrence of an electrical short due to the intrusion of rainwater or the like into the closed space can be suppressed and a malfunction of the coil can be avoided.

  In addition, since the connecting member is press-fitted (internally fitted) and held on the inner peripheral side of the yoke member formed in a cylindrical shape, the assembly cost can be reduced and the connecting member can be held firmly. Thus, there is an effect that the dropout during the reciprocating motion can be surely prevented. At the same time, since the function of sealing the above-described closed space and sealing the internal structure can be surely exhibited, there is an effect that entry of foreign matters and the like can be surely avoided.

  Furthermore, since the vibration isolating base is connected to the outer peripheral side of the yoke member, a sufficient contact area between the vibration isolating base and the vibration exciting device (yoke member) can be secured. Therefore, it is possible to secure a vulcanization adhesion area between the vibration isolating substrate and the vibration exciter and to suppress peeling of the adhesion portion, and therefore, there is an effect that durability can be improved correspondingly. . In addition, there is an effect that a pressure receiving area necessary for deforming the vibration-proof base can be secured and a desired spring constant can be exhibited.

  According to the vibration isolator of claim 8, in addition to the effect of the vibration isolator according to any of claims 1 to 6, the magnetic pole is formed in a cylindrical shape longer in the axial direction of the stator than the magnetic pole portion. Since the mover includes a yoke member formed so that the portion penetrates the inner peripheral side and the outer peripheral side, a magnetic body and a magnetic pole part are provided between the outer peripheral side of the stator and the inner peripheral side of the yoke member. There exists an effect that the closed space for accommodating can be formed. As a result, the sealing effect by the pair of connecting members has the effect of suppressing the intrusion of foreign matter or the like into the closed space (clearance) and avoiding the malfunction of the movable part.

  In addition, since the connecting member is press-fitted (internally fitted) and held on the inner peripheral side of the yoke member formed in a cylindrical shape, the assembly cost can be reduced and the connecting member can be held firmly. Thus, there is an effect that the dropout during the reciprocating motion can be surely prevented. At the same time, since the function of sealing the above-described closed space and sealing the internal structure can be surely exhibited, there is an effect that entry of foreign matters and the like can be surely avoided.

  Furthermore, since the vibration isolating base is connected to the outside of the magnetic pole portion passing through the inner peripheral side and the outer peripheral side of the yoke member, the contact area (pressure receiving area) with the vibration isolating base is reduced accordingly. There is an effect that the durability against twisting deformation can be improved. At the same time, the vibration-proof substrate absorbs the load when the load is input, and the load on the vibration device can be reduced accordingly, thus simplifying the structure of the vibration device (for example, downsizing or changing the material) ) To reduce the weight and reduce the cost.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. First, before explaining the vibration isolator 300 of the present invention, a technology (dynamic damper 1) that is the basis of the vibration isolator 300 will be described as a first embodiment. As will be described later, the vibration isolator 300 of the present invention uses the basic configuration of the dynamic damper 1 as an actuator device (vibration device).

  FIG. 1 is a perspective view schematically showing an attachment state of the dynamic damper 1 according to the first embodiment of the present invention. In the present embodiment, a case where the dynamic damper 1 is 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 example.

  As shown in FIG. 1, in the periphery of the dynamic damper 1, an engine 10 that generates a driving force of an automobile, a mounting bracket 11 that is attached to the engine 10 by bolts 11 a, 11 b, and 11 c, and a bolt that is attached to the mounting bracket 11 An engine mount 12 attached by 12a, a frame 13 to which the engine mount 12 is attached by bolts 12b, 12c, 12d, and 12e, and an acceleration sensor 14 arranged on the frame 13 are arranged. The dynamic damper 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 dynamic damper 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 dynamic damper 1 and is configured to perform more accurate vibration isolation.

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

  The dynamic damper 1 has a base plate 20 attached to the frame 13 by bolts 1a and 1b, 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 substantially cylindrical shaft member 22, a magnetic body portion 23 fixed to a substantially intermediate portion in the axial direction A (vertical direction in FIG. 3) of the shaft member 22, and a shaft member that surrounds the outer periphery of the shaft member 22 A yoke member 24 that can reciprocate in the axial direction A of the magnetic pole 22; a magnetic pole portion 25 that is a part of the yoke member 24 and that protrudes relatively toward the shaft member 22 with the shaft member 22 interposed therebetween; And a coil 26 fixed to the base plate 20 and a connecting portion 27 for connecting the yoke member 24 and the base plate 20 to each other.

  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 yoke member 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 yoke member 24 and the base plate 20 by vulcanization adhesion. In the present embodiment, the connecting portion 27 connects the two opposing side walls of the yoke member 24 and the base plate 20, but connects all the opposing surfaces of the yoke member 24 to the base plate 20. It is 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 yoke member 24 (the surface facing the magnetic body portion 23 of the shaft member 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 shaft member 22 to have different polarities (see FIG. 6 or FIG. 7).

  That is, the permanent magnet 28 on the left side of FIG. 3 is a permanent magnet 28a in which the surface facing the magnetic body portion 23 on the base plate 20 side is an N pole and the opposite surface side (the magnetic pole portion 25 side) is an S pole. 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 the drawing in 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. Further, a permanent magnetic pole 28a having an N pole on the side facing the magnetic body portion 23 away from the base plate 20 (upper side in FIG. 3) and an S pole on the opposite side (magnetic pole 25 side) is provided. .

  Therefore, the permanent magnets 28 arranged to face each other in the direction orthogonal to the axial direction A (the direction of arrow B in FIG. 3) are arranged 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 arranged on the left and right in FIG. 3 are electrically connected to each other, and a one-way 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, the magnetic flux passes between the pair of permanent magnets 28, and the magnetomotive force is generated. appear. In addition, since the coil 26 is fixed to the base material 20, even if the yoke member 24 reciprocates, it is possible to reduce the disconnection of the wiring connected to the coil 26.

  As shown in FIG. 3, the coil 26 is formed in a size having an operation allowable range t <b> 1 of the yoke member 24 in the axial direction A. This is because the yoke member 24 operates in the axial direction A while the coil 26 is fixed to the base plate 20, and is a space for ensuring the operating range t2 of the yoke member 24. .

  Next, 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 dynamic damper 1. In FIG. 4, in order to simplify the illustration and facilitate understanding, the dynamic damper 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 23 that is a memory for temporary storage 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 direction is in the opposite direction in FIG. 4 (ie, from the right side to the left side in FIG. A magnetomotive force is generated, and a magnetomotive force is generated from the left side to the right side on the lower side of FIG. 4).

  Next, the operation of the dynamic damper 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 for explaining the operating principle of the dynamic damper 1 when a current is passed through the coil 26 in the positive direction. FIG. 7 is an explanatory diagram for explaining the operating principle of the dynamic damper 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 is passed through the back side in the direction perpendicular to the paper surface. In this embodiment, it is assumed that a current is 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 direction perpendicular to the paper surface, 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 yoke member 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 yoke member 24 on the back side in the vertical direction (and the front side in the vertical direction 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.

  Regarding the main process, the CPU 31 first determines whether or not the engine 10 has been started (S101). If the engine 10 is not started (S101: No), it means that the automobile is stopped, and vibrations from the engine 10 are not transmitted to the frame 13, so that the steps S102 to S104 for preventing the vibration of the frame 13 are performed. The process proceeds to S105 without performing the process.

  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 the control of the dynamic damper 1 and will not be described in detail.

  Here, the operation of the dynamic damper 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. To do.

  As shown in FIG. 6, when a positive current is passed 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 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 shaft member 22 between the upper permanent magnets 28 acts, and since the shaft member 22 is fixed, a downward force (black arrow in FIG. 6) acts on the yoke member 24. The member 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 shaft member 22 is attracted between the permanent magnets 28 on the lower side of FIG. 7 works, and since the shaft member 22 is fixed, an upward force (black arrow in FIG. 7) is applied to the yoke member 24. Acting, the yoke member 24 moves upward.

  As described above, by changing the direction of the current flowing through the coil 26, the yoke member 24 can be reciprocated in the vertical (uniaxial) direction. Further, the operation direction of the yoke member 24 is controlled by the control device 30. That is, the control unit 30 can know the direction and magnitude of the vibration of the frame 13 from the acceleration detected by the acceleration sensor 14, and operate the yoke member 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 yoke member 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, in the case where 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 perform vibration isolation with an anti-vibration device that does not include an actuator or control unit that operates only in one direction. It becomes. However, since the dynamic damper 1 can operate in the reciprocating direction and the reciprocating operation can be controlled by the control unit 40 in accordance with the inputs of the engine speed detection sensor 40 and the acceleration sensor 14, the resonance frequency has a distorted waveform. Even if it is, the vibration can be isolated. Furthermore, since the operation of the yoke member 24 can be changed according to the magnitude of the current value, it is possible to perform a smooth operation compared to an actuator using a solenoid or the like.

  Further, since the yoke member 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 yoke member 24 can be reciprocated without a plurality of coils or permanent magnets. Therefore, the dynamic damper 1 itself can be reduced in size and the manufacturing cost can be reduced.

  Further, since the yoke member 24, the shaft member 22, the coil 26, and the connecting portion 27 are already attached to the base plate 20, the attaching process of the dynamic damper 1 is completed simply by attaching the base plate 20 to the frame 13. Therefore, the attachment process of the dynamic damper 1 can be simplified.

  Next, an embodiment in which the basic configuration of the dynamic damper 1 described in the first embodiment described above is used for the vibration isolator 300 will be described as a second embodiment with reference to FIGS. 8 to 13. The vibration isolator 300 of the present invention is configured as an active body mount, and the basic configuration of the dynamic damper 1 is used as the actuator device (vibration device). In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 8A is a top view of the image stabilizer 300 in the second embodiment, and FIG. 8B is a front view of the image stabilizer 300. 9 is a cross-sectional view of the vibration isolator 300 taken along the line IX-IX in FIG. 8A, and FIG. 10 is a partially enlarged cross-sectional view of the vibration isolator 300 shown in FIG.

  11 is a cross-sectional view of the vibration isolator 300 taken along line XI-XI in FIG. 9, and FIG. 12 is a cross-sectional view of the vibration isolator 300 taken along line XII-XII in FIG. In addition, in FIG. 9, the attachment state to the vehicle body frame BF is illustrated. 10 corresponds to a partially enlarged cross-sectional view of the vibration isolator 300 shown in FIG.

  The vibration isolator 300 is a body mount that is interposed between the vehicle body frame BF and a suspension member (not shown), and supports the suspension member with respect to the vehicle body frame BF in a vibration-proof manner. As shown in FIG. 8 to FIG. 12, the vibration device 110, the outer cylinder 140, and the vibration isolation base 150 are mainly provided.

  As shown in FIG. 9, the vibration exciter 110 is attached to the vehicle body frame BF, and is fastened to the vehicle body frame BF by a shaft-like member J that is inserted into the inner peripheral side of the inner cylinder 122 described later. Fixed. The outer cylinder 140 is fixed by being press-fitted from above (upper side in FIG. 9) into the cylindrical holder F of the suspension member connected to the suspension member.

  The vibration isolation base 150 is formed of a rubber-like elastic body, and connects the vibration exciter 110 and the outer cylinder 140 by vulcanization adhesion as shown in FIGS. In addition, at two locations facing the diameter direction (for example, the left-right direction in FIG. 8A) of the vibration-proof base 150, the straight portions 151 are formed penetrating in the axial direction, and load-deflection characteristics in the direction perpendicular to the axis. Is given anisotropy.

  As described above, in the vibration isolator 300 according to the present embodiment, as shown in FIGS. 8 to 12, the cylindrical outer cylinder 140 is disposed outside the vibration exciter 110, and the vibration exciter 110 and the external Since the tube 140 is connected to the vibration isolator base 150, the vibration exciter 110 can be reduced in size to reduce the weight of the vibration isolator 300 as a whole, and the volume of the vibration isolator base 150 can be secured. Thus, it is possible to improve the durability and the vibration damping effect by the vibration isolation base 150.

  That is, a configuration different from that of the vibration isolator 300 according to the present embodiment, for example, a cylindrical member through which the shaft-like member J of the vehicle body frame BF is inserted is provided, and the vibration exciter is disposed outside the cylindrical member. When the cylindrical member and the vibration exciting device are connected by the vibration isolating base, the volume of the vibration isolating base disposed on the inside cannot be secured, and its durability and vibration suppression by the vibration isolating base are not possible. In addition to incurring a reduction in the effect, there is a problem in that the size of the vibration device disposed outside increases the weight of the vibration isolation device as a whole. On the other hand, in the vibration isolator 300 according to the present embodiment, such a problem can be solved by adopting the above-described configuration.

  The outer cylinder 140 is a member formed of a steel material into a cylindrical shape, and is formed to project radially outward at the upper end (upper end in FIG. 9) as shown in FIG. 9, FIG. 11 or FIG. A flange portion 141 is provided. On the upper surface of the flange portion 141, a stopper rubber portion 352 that exhibits a stopper action with the stopper surface S <b> 1 of the vehicle body frame BF is formed by a rubber-like elastic body continuous with the vibration isolation base 150.

  As shown in FIGS. 9 to 12, the vibration exciter 110 is formed from a magnetic material that is formed in a cylindrical shape and is fixed to the outer peripheral portion of the inner cylinder 122 through which the shaft-shaped member J described above is inserted. A magnetic body portion 123, a yoke member 124 connected to the outer cylinder 140 via the vibration isolation base 150, and a pair of magnetic pole portions 125 that are part of the yoke member 124 and are located with the inner cylinder 122 interposed therebetween. The coil 126 wound around each magnetic pole part 125 and fixed to each magnetic pole part 125, and a pair of connecting members 130 for connecting the yoke member 124 and the inner cylinder 122 are mainly provided. .

  As shown in FIGS. 8 to 12, the inner cylinder 122 is formed in a cylindrical shape having a symmetrical shape around the axis O, and a magnetic part 123 is fixed to the outer peripheral surface thereof. Similar to the magnetic body portion 23 in the first embodiment, the magnetic body portion 123 is configured by laminating a number of substantially disk-shaped metal plates made of a magnetic metal such as an electromagnetic steel plate. And as shown in FIG. 12, it carries out the external fitting press-fit in the outer peripheral surface of the inner cylinder 122. As shown in FIG.

  Like the yoke member 24 in the first embodiment, the yoke member 124 is made of a magnetic metal such as an electromagnetic steel plate, and the outer shape shown in FIG. 12 (a pair of magnetic pole portions 125 from the inner peripheral surface of the cylindrical shape is a magnetic body portion). A plurality of metal plates having a shape projecting toward 123). The yoke member 124 is formed longer in the axial direction of the inner cylinder 122 than the magnetic pole portion 125, as shown in FIG.

  Thus, the yoke member 124 is formed in a cylindrical shape that is longer in the direction of the axis O of the inner cylinder 122 than the magnetic pole part 125, and the magnetic pole part 125 faces the magnetic body 123 of the inner cylinder 122 from the inner peripheral side. Therefore, a closed space for accommodating the coil 126 can be formed between the outer peripheral side of the inner cylinder 122 and the inner peripheral side of the yoke member 124.

  As a result, due to the sealing effect by the connecting member 130 and the sealing member 160, which will be described later, it is possible to suppress the occurrence of an electrical short due to the intrusion of rainwater or the like into the closed space or the malfunction due to the intrusion of foreign matter.

  In addition, since the connecting member 130 described later is press-fitted (internally fitted) and held on the inner peripheral side of the yoke member 124 formed in a cylindrical shape, the assembly cost can be reduced and the connecting member 130 can be reduced. It is possible to securely prevent the dropout during reciprocating movement. At the same time, since the function of sealing the above-described closed space and sealing the internal structure can be surely exhibited, it is possible to reliably avoid the entry of foreign matters.

  Furthermore, since the vibration isolation base 150 is connected to the outer peripheral side of the yoke member 124, a sufficient contact area between the vibration isolation base 150 and the vibration exciter 110 (yoke member 124) can be secured. Therefore, since the vulcanization adhesion area between the vibration isolator base 150 and the vibration exciter 110 can be secured and peeling of the adhesion portion can be suppressed, the durability can be improved accordingly. Further, it is possible to secure a pressure receiving area necessary for deforming the vibration isolation base 150 and to exhibit a desired spring constant.

  As shown in FIG. 9, the upper and lower end surfaces (vertical end surfaces in FIG. 9) of the yoke member 124 are between the stopper surface S1 of the vehicle body frame BF and the stopper surface S2 disposed on the front end side of the shaft-shaped member J. Stopper rubber portions 353 and 354 exhibiting a stopper action are formed of a rubber-like elastic body connected to the vibration isolating base 150.

  Here, as shown in FIG. 8B, the stopper rubber portions 352 to 354 are set so that the height dimension along the direction of the axis O is higher than that of the inner cylinder 122 and is continuous in the circumferential direction. It is formed as a ridge. Therefore, as shown in FIG. 9, in the mounted state on the vehicle body frame BF, the stopper rubber portions 352 and 353 are brought into contact with the stopper surface S1 on the vehicle body frame BF side, and the stopper rubber portion 354 is attached to the shaft-shaped member J. The stopper rubber portions 352 to 354 are brought into contact with a stopper surface S2 provided on the distal end side, and are compressed and deformed.

  Thus, the stopper rubber portions 352 to 354 can close the opening portion of the vibration device 110 together with the connecting member 130 and the sealing member 160 described later, and thus the internal structure of the vibration device 110 (that is, the magnetic body portion). The clearance part between 123 and the permanent magnet 128, the electrical configuration of the coil 126, etc.) can be sealed, and the communication between the internal structure of the vibration means 110 and the outside can be blocked.

  As a result, as described above, it is possible to more reliably prevent the entry of foreign matter and rainwater into the inside of the vibration exciter 110, so that the foreign matter is present in the clearance portion between the magnetic body portion 123 and the permanent magnet 128. It is possible to avoid the occurrence of malfunction due to pinching or the occurrence of an electrical short circuit due to rain water or the like, and to further improve the reliability of the vibration exciting device 300.

  9, the stopper rubber portion 352 is formed at a position corresponding to the flange portion 141 of the outer cylinder 140, and the stopper rubber portions 353 and 354 are upper and lower end surfaces of the yoke member 124 (the end surface in the vertical direction in FIG. 9). ), The stopper rubber portions 352 to 354 are connected to the stopper surfaces S1 and S2 by the flange portion 141 of the outer cylinder 140 and the upper and lower end surfaces of the yoke member 124 when mounted on the body frame BF. Can be pressed firmly. Accordingly, the compressed state of the stopper rubber portions 352 to 354 can be reliably maintained, and the function of preventing the entry of foreign matters and the like by the above-described sealing effect can be stably exhibited.

  As in the case of the first embodiment, the magnetic pole portion 125 is provided with a permanent magnet 128 on the surface facing the magnetic body portion 123. As shown in FIG. 10 or FIG. 12, the permanent magnets 128 adjacent to each other in the axial center O direction (vertical direction in FIG. 10) have different polarities (permanent magnets 128a (S pole), 128b (N pole)). At the same time, those facing each other in the direction substantially orthogonal to the direction of the axis O (the left-right direction in FIG. 10) are also arranged to have different polarities (permanent magnets 128a (S pole), 128b (N pole)).

  Note that the polarity (permanent magnets 128a and 128b) of the permanent magnet 128 located at the uppermost position in the axis O direction (upper side in FIG. 10) is the same as that of the permanent magnet 128 located at the lowermost position in the axis O direction (lower side in FIG. 10). The polarities (permanent magnets 128b, 128a) are different from each other in the direction of the axis O, and are different from each other in the direction substantially perpendicular to the direction of the axis O (permanent magnets 128a (S pole), 128b (N pole). )) (See FIG. 10).

  Further, as shown in FIG. 10, the permanent magnet 128 has a length dimension in the direction along the axis O direction (vertical direction in FIG. 10) longer than the length dimension in the direction along the axis O direction of the magnetic body portion 123. It is structured long. That is, in the permanent magnet 128, the permanent magnet 128 (permanent magnets 128a and 128b) positioned at the uppermost position in the direction of the axis O (upper side in FIG. 10) extends to the upper side (upper side in FIG. 10) than the magnetic body portion 123. At the same time, a permanent magnet 128 (permanent magnets 128b and 128a) positioned at the lowest position in the direction of the axis O (downward in FIG. 10) extends below the magnetic body portion 123 (downward in FIG. 10) (see FIG. 10). ).

  As described above, the connecting member 130 is a member that connects the yoke member 124 and the inner cylinder 122. Here, with reference to FIG. 13, the detailed structure of the connection member 130 is demonstrated. Fig.13 (a) is a top view of the connection member 130, FIG.13 (b) is sectional drawing of the connection member 130 in the XIIIb-XIIIb line | wire of Fig.13 (a).

  As shown in FIG. 13, the connecting member 130 is formed in a cylindrical shape and has an outer ring member 132 having rolling element rolling grooves 131 on the inner peripheral side, and a large number of connecting members 130 loaded in the rolling element rolling grooves 131 of the outer ring member 132. The spherical rolling element 133 is configured as a slide ball bearing using the inner cylinder 122 as a slide shaft.

  That is, the connecting member 130 is fitted on the outer peripheral side of the outer ring member 132 by linearly moving in the direction of the axis O of the inner cylinder 122 via the rolling elements 133 loaded in the rolling element rolling grooves 131. It functions as a linear guide mechanism that guides (reciprocates) the yoke member 124 in the direction of the axis O of the inner cylinder 122.

  Therefore, the reciprocating motion of the mover (such as the yoke member 124) is smoothly performed while maintaining an appropriate distance (clearance) between the magnetic body portion 123 of the inner cylinder 122 and the permanent magnet 128 of the magnetic pole portion 125. Can be made.

  That is, the connecting member 130 as a linear guide mechanism (slide ball bearing) is configured to use the inner cylinder member 122 as a slide shaft. Therefore, when the yoke member 124 or the like reciprocates with respect to the inner cylinder 122, Since the movement of the inner cylinder 122 in the direction along the axis O (forward movement and backward movement) can be guided, the movement of the inner cylinder 122 in the direction perpendicular to the axis O can be restricted. The distance (clearance) between 122 and the yoke member 124 and the like can be maintained with high accuracy. As a result, the output of the vibration exciter 110 can be improved and stabilized.

  As shown in FIG. 9, the vibration isolator 300 is provided with a pair of connecting members 130, and the pair of connecting members 130 includes the magnetic body portion 123, the magnetic pole portion 125 of the yoke member 124, and the coil. It is facing with 126 therebetween. Thereby, the opening part of the vibration excitation apparatus 110 can be sealed, and a communication with an internal structure (namely, movable part or electrical structure) and the exterior can be interrupted | blocked.

  As a result, it is possible to avoid, for example, malfunction due to the entry of foreign matter into the clearance between the inner cylinder 122 and the yoke member 124 or the like, and the occurrence of an electrical short due to the entry of rainwater, etc. The reliability of 110 can be improved. The rolling element rolling grooves 131 are filled with grease. Thereby, while ensuring lubricity between the outer peripheral surfaces of the inner cylinder 122, the penetration | invasion of the foreign material into the internal structure through a lubrication surface can be prevented.

  Further, since the connecting member 130 is configured to be held by press-fitting (internally fitting) the outer peripheral side of the outer ring member 132 with respect to the inner peripheral side of the yoke member 124, for example, a configuration in which these members are held by screwing. Compared with, the structure can be simplified. Therefore, it is possible to reduce the component cost and the assembly cost, and accordingly, the product cost of the vibration isolator 300 as a whole can be reduced. In addition, while simplifying the structure, the function of sealing the internal structure by closing the opening of the vibration device 300 described above can be surely exhibited, so that foreign matters enter the internal structure. Can also be effectively suppressed.

  Returning to FIG. The sealing member 160 is a member for closing the opening of the vibration means 110 together with the stopper rubber portions 352 to 354 and the connecting member 130. Here, with reference to FIG. 14, the detailed structure of the sealing member 160 is demonstrated. 14A is a top view of the sealing member 160, and FIG. 14B is a cross-sectional view of the sealing member 160 taken along the line XIVb-XIVb in FIG. 14A.

  As illustrated in FIG. 14, the sealing member 160 includes an inner disk portion 161, an outer disk portion 162, and a connecting elastic body 163. The inner disc portion 161 and the outer disc portion 162 are plate-like members made of a steel material in an annular shape when viewed from above, and the connecting elastic body 163 is made of a rubber-like elastic body. The outer peripheral part and the inner peripheral part of the outer disc part 162 are connected by vulcanization adhesion.

  Returning to FIG. As shown in FIG. 9, the vibration isolator 300 is provided with a pair of sealing members 160, and the pair of sealing members 160 are opposed to each other with the connecting member 130 interposed therebetween, that is, the inner cylinder 122. Are disposed at both ends of the axial center O direction.

  As shown in FIG. 9, the connecting member 130 externally holds the inner peripheral portion of the inner disc portion 161 on the outer peripheral side of the inner cylinder 122, and the outer peripheral portion of the outer disc portion 162 is fixed to the yoke member 124. By holding the inner fitting on the inner peripheral side, the opening of the vibration means 110 is closed, and the internal structure (that is, the clearance between the magnetic body 123 and the permanent magnet 128 and the electrical of the coil 126) is closed. Seal the configuration etc.). Thereby, the communication between the internal structure of the vibration means 110 and the outside is blocked.

  Thereby, it acts synergistically with the sealing effect by the pair of connecting members 130 and the stopper rubber portions 352 to 354 described above, and the operation by the entry of foreign matter into the clearance portion between the magnetic body portion 123 and the permanent magnet 128. It is possible to effectively avoid the occurrence of defects and electrical shorts due to the intrusion of rainwater, and the reliability of the vibration exciter 110 can be further improved accordingly.

  At the same time, it is possible to avoid malfunction due to the entry of foreign matter into the movable part of the connecting member 130 (such as the sliding surface between the inner cylinder member 122 and the rolling element 133) or a decrease in durability due to wear. Therefore, the reliability of the vibration exciter 110 can be further improved.

  Further, as described above, the sealing member 160 is configured to connect the outer periphery of the inner disk portion 161 and the inner periphery of the outer disk portion 162 with the connecting elastic body 163, so that the yoke member 124 and the like are provided. When reciprocating, the connecting elastic body 163 is deformed in the shearing direction to reduce its deformation resistance, and the reciprocating motion of the yoke member 124 and the like can be performed smoothly. The output can be improved and stabilized.

  Further, as described above, the sealing member 160 is held by press-fitting (outer fitting or inner fitting) the inner disc portion 161 and the outer disc portion 162 into the inner cylinder 122 and the yoke member 124. Therefore, for example, the structure can be simplified as compared with a configuration in which these are held by screwing.

  Therefore, it is possible to reduce the component cost and the assembly cost, and accordingly, the product cost of the vibration isolator 300 as a whole can be reduced. In addition, since the function of sealing the internal structure by closing the opening portion of the vibration exciter 110 described above can be surely exhibited while simplifying the structure, entry of foreign matter into the internal structure, etc. Can also be effectively suppressed.

  As described above, according to the vibration isolator 300 in the second embodiment, the coil 126 is excited to generate a magnetomotive force, whereby the yoke member 124 is moved back and forth with respect to the inner cylinder 122. Since it can be electrically driven in both directions with respect to the moving process, the input vibration can be reduced by reciprocating the yoke member 124 in a direction to cancel the input vibration. As a result, vibration transmitted from the suspension member (not shown) to the vehicle body frame BF can be sufficiently reduced, but transmission of such vibration to the vehicle interior is suppressed, and quietness and ride comfort are suppressed. Can be improved.

  Note that such control (that is, the current waveform for energizing the coil 126) can be performed according to the detection result of the acceleration sensor 14 as in the case of the first embodiment described above. The installation location of the acceleration sensor 14 can be selected as appropriate. For example, the acceleration sensor 14 may be installed on a vibration transmission path between the vibration isolator 300 and the suspension member, and the vibration isolator 300 and the passenger compartment (occupant space). ) On the vibration transmission path (for example, the vehicle body frame BF), or both. Further, noise in the passenger space may be detected by a microphone, and the detection result may be used together with the detection result by the acceleration sensor 14.

  When the acceleration sensor 14 is mounted on a vibration transmission path (for example, the holder F) between the vibration isolator 300 and the suspension member, the vibration input from the suspension member to the vibration isolator 300 is directly detected. Therefore, so-called prospective control can be performed, and vibration transmitted from the suspension member to the vehicle interior can be reduced with high accuracy.

  On the other hand, when the acceleration sensor 14 is mounted on a vibration transmission path (for example, the vehicle body frame BF) between the vibration isolator 300 and the passenger compartment (occupant space), the vehicle body passes through the vibration isolator 300. Since vibrations transmitted to the frame BF, that is, vibrations transmitted to a passenger such as a driver, can be detected, by performing control according to only such vibrations, control is performed to attenuate only vibrations that need to be attenuated. As a result, the control cost can be reduced accordingly.

  Next, a third embodiment will be described with reference to FIGS. 15 to 18. FIG. 15A is a top view of the vibration isolator 400 according to the third embodiment, and FIG. 15B is a front view of the vibration isolator 400. FIG. 16 is a cross-sectional view of the vibration isolator 400 taken along line XVI-XVI in FIG.

  17 is a cross-sectional view of the vibration isolator 400 taken along the line XVII-XVII in FIG. 16, and FIG. 18 is a cross-sectional view of the vibration isolator 400 taken along the line XVIII-XVIII in FIG. In addition, in FIG. 16, the attachment state to the vehicle body frame BF is illustrated.

  In the second embodiment, the case where the vibration isolation base 150 is connected to the outer peripheral surface of the yoke member 125 has been described. However, in the vibration isolation device 400 according to the third embodiment, the vibration isolation base 250 is outside the magnetic pole portion 225. Are connected to each other. In addition, the same code | symbol is attached | subjected about the part same as said each embodiment, and the description is abbreviate | omitted.

  The yoke member 224 in the third embodiment is made of a magnetic metal such as an electromagnetic steel plate, like the yoke member 124 in the second embodiment, and has the outer shape (cylindrical inner peripheral surface and A plurality of metal plates having a shape in which a pair of magnetic pole portions 125 penetrates the outer peripheral side are laminated. Further, as shown in FIG. 16, the yoke member 224 is formed longer in the direction of the axis O of the inner cylinder 122 than the magnetic pole portion 225.

  A connecting member 230 is fitted and held on the inner peripheral side of the yoke member 224. The connecting member 230 is a slide ball bearing that uses the inner cylinder 122 as a slide shaft. Similar to the connecting member 130 in the second embodiment, the connecting member 230 includes an outer ring member 232 having rolling element rolling grooves 231, and a rolling element rolling member. A large number of rolling elements 233 loaded in the groove 231 are configured.

  Thus, the yoke member 224 is formed in a cylindrical shape that is longer than the magnetic pole portion 225 in the direction of the axis O of the inner cylinder 122, and the permanent magnet 128 of the magnetic pole portion 125 is disposed on the inner peripheral side of the yoke member 224. Since the structure faces the magnetic body 123 of the cylinder 122, a closed space for accommodating the magnetic body 123 and the permanent magnet 128 is formed between the outer peripheral side of the inner cylinder 122 and the inner peripheral side of the yoke member 224. it can. As a result, due to the sealing effect of the stopper rubber portions 352 to 354 and the pair of connecting members 230, it is possible to suppress the intrusion of foreign matter or the like into the closed space (clearance) and avoid the malfunction of the movable portion.

  Further, since the connecting member 230 is press-fitted (internally fitted) and held on the inner peripheral side of the yoke member 224 formed in a cylindrical shape, the assembling cost can be reduced and the connecting member 230 can be strengthened. So that it can be prevented from falling off during reciprocating motion. At the same time, since the function of sealing the above-described closed space and sealing the internal structure can be surely exhibited, it is possible to reliably avoid the entry of foreign matters.

  Here, in the vibration isolator 400 according to the third embodiment, as shown in FIGS. 15 to 18, the vibration isolator base 250 is connected to the outside (left and right side surfaces in FIG. 15) of the magnetic pole portions 225 arranged to face each other. Therefore, the contact area (pressure receiving area) with the vibration isolation base 250 can be reduced accordingly, and durability against twist deformation can be improved. At the same time, the vibration isolator base 250 absorbs the load at the time of load input, and the load on the vibration device 210 can be suppressed correspondingly, thereby simplifying the structure of the vibration device 210 (for example, downsizing). Or changing the material, etc.) to reduce weight and reduce costs.

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

  For example, the numerical values given in the above embodiments are merely examples, and other numerical values can naturally be adopted.

  In the second and third embodiments, the case where the inner cylinder 122 is attached to the body frame BF side and the outer cylinder 140 is attached to the suspension member (holder F) side has been described. However, the present invention is not limited to this. Instead, this correspondence may be reversed, that is, the inner cylinder 122 may be attached to the suspension member (holder F) side and the outer cylinder 140 may be attached to the vehicle body frame BF side.

  In the second and third embodiments, the description of the wiring method of the supply line 127 (the electric wire for supplying power from the control unit 30 (see FIG. 4) to the coil 126) is omitted. Can be wired.

  In the vibration isolator 300 according to the second embodiment, the through hole formed in the outer ring member 132 of the connecting member 130, the through hole formed in the connecting elastic body 163 of the sealing member 160, and the stopper surface S2 are provided. A supply line 127 is wired between the coil 126 and the control unit 30 (see FIG. 4) through the drilled through hole.

  Thereby, the structure for routing the supply line 127 can be simplified, and the manufacturing cost of the vibration isolator 300 can be reduced. That is, since the inner disc portion 161 and the outer disc portion 162 are made of a steel material, forming a through hole in such a member causes an increase in processing cost. If it is the structure which forms the through-hole 134, since a through-hole can be simultaneously shape | molded when vulcanizing-bonding the connection elastic body 163 to the inner side disk part 161 and the outer side disk part 162, the part, The manufacturing cost can be reduced.

  Note that the through hole is formed only in one of the pair of connecting members 130 and the pair of sealing members 160 (the lower side in FIG. 9), and is not formed in the other (the upper side in FIG. 9). In addition, the through hole through which the supply line 127 is inserted is filled with a sealing material, and communication between the inside and outside through the through hole is completely blocked, and the sealing material functions as a cushioning material to cut off the supply line 127. To prevent.

  However, the through hole can naturally be formed in the inner disk portion 161 or the outer disk portion 162 of the sealing member 160. In this case, the supply line 127 can be further prevented from being disconnected.

  That is, if a supply line is wired to the through hole provided in the connecting elastic body 163, the through hole is also deformed when the connecting elastic body 163 is deformed with the input of vibration to the vibration isolator 300, so that the through hole As the hole is deformed, a load is applied to the supply line 127 and it is easy to break. However, if the through hole is provided in the inner or outer disk portions 161 and 162, the through hole is not deformed. The load to 274 can be avoided and the disconnection can be suppressed. The through hole is filled with the sealing material as described above.

  In the vibration isolator 400 according to the third embodiment, the supply line 127 is wired between the coil 126 and the control unit 30 (see FIG. 4) through a through hole formed in the stopper surface S2. In the third embodiment, as described above, since the coil 126 can be arranged on the outer peripheral side of the yoke member 224, there is no need to make a through hole in the connecting member 230, and the processing cost is reduced accordingly. be able to.

  In the third embodiment, the case where the coil 126 is disposed on the outer peripheral side of the yoke member 224 has been described. However, the present invention is not limited to this, and the coil 126 is disposed on the inner peripheral side of the yoke member 224. Of course it is possible to do. That is, only the outside of the magnetic pole portion 225 is connected to the vibration isolation base 250 as in the case of the third embodiment, while the coil 126 is connected to the inner cylinder 122 as in the case of the second embodiment. And the yoke members 124 and 224 are accommodated in a closed space.

  As a result, the above-described effect, that is, since the connection with the vibration isolating base 250 is only the magnetic pole portion 225, it is possible to secure durability against torsional deformation and to suppress the load on the vibration means 220 due to the input load. At the same time, since the coil 126 is closed in the closed space, it is possible to avoid malfunction due to the ingress of water or the like.

  Furthermore, in this case, the outer peripheral surface of the yoke member 224 can function as a stopper surface when a large displacement is input. That is, the outer peripheral surface of the yoke member 224 is brought into contact with the inner peripheral surface of the vibration isolation base 250, so that the displacement can be restricted and the stopper function can be exhibited.

  In the third embodiment, the sealing member 160 is omitted, but it is naturally possible to provide the sealing member 160. In this case, as in the case of the second embodiment, it is held by press-fitting between the outer peripheral surface of the inner cylinder 122 and the inner peripheral surface of the yoke member 224.

It is the perspective view which showed roughly the attachment state of the dynamic damper in 1st Embodiment of this invention. It is the perspective view which showed the external appearance of the dynamic damper. FIG. 3 is a cross-sectional view of a dynamic damper and a frame taken along line III-III in FIG. 2. It is the electric circuit diagram which showed the electrical connection of the dynamic damper. It is the flowchart which showed the main process. It is explanatory drawing for demonstrating the operation principle of the dynamic damper when an electric current is sent through the coil to the positive direction. It is explanatory drawing for demonstrating the operation | movement principle of a dynamic damper when an electric current is sent through a coil to a negative direction. (A) is a top view of the vibration isolator in 2nd Embodiment, (b) is a front view of a vibration isolator. It is sectional drawing of the vibration isolator in the IX-IX line of Fig.8 (a). FIG. 10 is a partial enlarged cross-sectional view of the vibration isolator shown in FIG. 9. It is sectional drawing of the vibration isolator in the XI-XI line of FIG. It is sectional drawing of the vibration isolator in the XII-XII line | wire of FIG. (A) is a top view of a connection member, (b) is sectional drawing of the connection member in the XIIIb-XIIIb line | wire of Fig.13 (a). (A) is a top view of a sealing member, (b) is sectional drawing of the sealing member in the XIVb-XIVb line | wire of Fig.14 (a). (A) is a top view of the vibration isolator in 3rd Embodiment, (b) is a front view of a vibration isolator. It is sectional drawing of the vibration isolator in the XVI-XVI line | wire of Fig.15 (a). It is sectional drawing of the vibration isolator in the XVII-XVII line of Fig.16 (a). It is sectional drawing of the vibration isolator in the XVIII-XVIII line | wire of Fig.16 (a).

Explanation of symbols

300,400 Vibration isolator 110,220 Exciter 122 Inner cylinder (part of stator)
123 Magnetic body (magnetic body)
124, 224 Yoke member (part of the mover)
125, 225 Magnetic pole part (part of the mover)
126 Coil 127 Supply line 128 Permanent magnet (magnet)
128a, 128b Permanent magnet (a pair of magnets)
130, 230 Connecting member 131, 231 Rolling body rolling groove 132, 232 Outer ring member 133, 233 Rolling body 160 Sealing member 161 Inner disk part 162 Outer disk part 163 Connecting elastic body 140 Outer cylinder 150, 250 Anti-vibration base 353 Stopper rubber part (first lip part)
354 Stopper rubber part (second lip part)
30 Control part BF Body frame J Shaft-like member S1, S2 Stopper surface O Axle (reciprocating direction of movable element)

Claims (8)

A vibration device attached to the body frame side;
A cylindrical outer cylinder that is disposed on the outside of the vibration exciter with a gap and attached to the suspension member;
A vibration isolating base composed of a rubber-like elastic body connecting the outer cylinder and the vibration exciting device;
The vibration exciter is
A stator through which a shaft-like member of the body frame is inserted and fixed to the body frame and having a magnetic body at least partially;
A mover having a magnetic pole portion disposed at a position corresponding to the magnetic body of the stator and configured to reciprocate in a direction along the shaft-shaped member and coupled to the vibration isolation base;
A coil that is wound around the magnetic pole portion of the mover and is excited when a current flows;
A pair of connecting members that connect the stator and the mover and face each other across the magnetic body of the stator and the magnetic pole part of the mover;
The pair of connecting members includes an outer ring member that is formed in a cylindrical shape and has rolling element rolling grooves on the inner peripheral side, and a large number of rolling elements that are loaded in the rolling element rolling grooves of the outer ring member. It is configured as a linear guide mechanism that linearly moves in the axial direction of the stator by being guided by the stator through the rolling elements loaded in the moving body rolling grooves, and the outer peripheral side of the outer ring member is movable. The inner fit is held in the child,
An anti-vibration device configured to drive the mover in both a forward movement process and a backward movement process by exciting the coil to generate a magnetomotive force. The magnetic pole portion of the mover includes at least a pair of magnets,
The pair of magnets are arranged with different magnetic poles adjacent to each other in the reciprocating direction of the mover, and arranged with the arrangement of the magnetic poles reversed in a direction perpendicular to the reciprocating direction of the mover,
The movable element is configured to be driven in both the forward movement process and the backward movement process by a combination of a magnetomotive force generated between the pair of magnets and a magnetomotive force generated by exciting the coil. The anti-vibration device according to claim 1, wherein the anti-vibration device is provided. The magnetic pole part of the mover is opposed to the stator in the direction perpendicular to the reciprocating direction of the mover,
The pair of magnets face each other across the stator magnetic body in a direction orthogonal to the reciprocating direction of the mover, and the arrangement of the magnetic poles is reversed so that the opposing magnetic poles are different from each other. The vibration isolator according to claim 2, wherein the vibration isolator is disposed in a magnetic pole portion of the mover in a state.   The vibration isolator according to claim 2 or 3, wherein a plurality of the pair of magnets are arranged in a reciprocating direction of the mover. The anti-vibration base protrudes from an end surface on one end side and protrudes from the end surface on the other end side, and protrudes from the end surface on the other end side in a ring shape along the movable element. A ridge-shaped second lip formed annularly along the child,
In the mounted state on the vehicle body frame, the first lip portion is in contact with the stopper surface on the vehicle body frame side, and the second lip portion is in contact with the stopper surface provided on the tip side of the shaft-like member. The vibration isolator according to any one of claims 1 to 4, wherein the first lip portion and the second lip portion are in contact with each other and are compressed and deformed. An inner disc portion that is fitted and held on the outer peripheral side of the stator, an outer disc portion that is fitted and held on the inner peripheral side of the mover, the inner disc portion and the outer disc portion. A pair of sealing members having a connected elastic body connected to each other and composed of a rubber-like elastic body,
The vibration isolator according to any one of claims 1 to 5, wherein the pair of sealing members are disposed at positions facing each other with the pair of connecting members interposed therebetween. The mover includes a yoke member that is formed in a cylindrical shape that is longer in the axial direction of the stator than the magnetic pole portion, and the magnetic pole portion projects from an inner peripheral side toward the magnetic body of the stator. ,
7. The connecting member according to claim 1, wherein the connecting member is fitted and held on the inner peripheral side of the yoke member, and the vibration-proof base is connected to the outer peripheral side of the yoke member. Anti-vibration device. The mover includes a yoke member that is formed in a cylindrical shape that is longer in the axial direction of the stator than the magnetic pole portion, and the magnetic pole portion is formed so as to penetrate the inner peripheral side and the outer peripheral side.
7. The device according to claim 1, wherein the connecting member is fitted and held on an inner peripheral side of the yoke member, and the vibration-proof base is connected to the outside of the magnetic pole portion. Anti-vibration device.

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