CN101418842A - Fluid filled vibration damping device and electric actuator for use in the same - Google Patents

Abstract

The present invention provides a newly constructed fluid enveloping vibration proof device and an electric actuator used therein. The fluid enveloping vibration proof device can switch the vibration proof characteristic and can hold the switched vibration proof characteristic without energizing. The number increasing of the accessory can be avoided and the fluid enveloping vibration proof device can be realized through a simple structure and an easy manufacturing process. The fluid enveloping vibration proof device is provided with a movable valve body (102) which switches a fluid flow path (72) into a connecting state and a switching-off state through reciprocated movement. A movable valve body (102) is driven by an electric motor (84), and furthermore power switching devices (90, 108) are provided on a transferring path in which the driving force is transferred from the electric motor (84) to the moveable valve body (102). The rotation driving force of the electric motor (84) is transferred to the movable valve body (102) as the reciprocated driving force through the power switching devices (90, 108).

Description

Fluid-filled vibration damping device with and employed electric actuator

Technical field

The present invention relates to fluid-filled vibration damping device, this vibration control equipment is between the member that should vibrationproof links, the mutual vibrationproof of these members linked up or these members are carried out the vibrationproof supporting, utilized vibration-isolating effect based on the mobilization of being enclosed inner fluid, particularly relate to the fluid-filled vibration damping device that fluid flowing path can be switched to connected state and dissengaged positions, compression chamber and balance cylinder that this fluid flowing path will have been enclosed fluid are interconnected.

Background technique

Known in the past have a vibration control equipment, as between between the member that constitutes the vibration transfer system and the device that the mutual vibrationproof of these members is linked up or these members are carried out the vibrationproof supporting.A kind of as vibration control equipment, have compression chamber and the balance cylinder of having enclosed incompressible fluid in inside, and the fluid-filled vibration damping device with the structure that compression chamber and balance cylinder is communicated with by fluid flowing path is also as the engine mounting and the engine stand supporting of for example automobile.

And, in fluid-filled vibration damping device, switch to connected state and dissengaged positions, changeable control vibrationproof characteristic by make the fluid flowing path that compression chamber and balance cylinder are interconnected by air pressure and the power-actuated movable valve body of electromagnetism.As an one example, a kind of fluid-filled vibration damping device is disclosed at 2004-No. 150546 communiques of TOHKEMY, this fluid-filled vibration damping device has following structure: by under the effect in the magnetic field that stator produced with coil, the mover that is made of the strong magnetism body driven make its displacement, use the movable valve body that constitutes by mover that fluid flowing path is switched to connected state and dissengaged positions.

At this, in 2004-No. 150546 communiques of TOHKEMY etc.,, must keep to coil electricity to come to mover effect confining force for the state after keeping mover with respect to stator displacement.But, when keeping the state to coil electricity continuously, the electric power that is consumed increases, and heating that simultaneously might coil becomes the reduction that causes durability greatly.

Also shown in 2004-No. 150546 communiques of TOHKEMY, following structure has been proposed: use helical spring, always mover is applied active force to driving direction one side, with mover when the direction opposite with force direction drives, to coil electricity, and when force direction drives, do not need energising.

But, adopting like this under the situation of the structure that has utilized helical spring active force, must append as the other helical spring of member, therefore exist increased part number, thing followed structure complicated, owing to must carry out the problems such as productivity reduction that helical spring assembling procedure causes.

Summary of the invention

At this, the present invention is that background makes with situation as mentioned above, its purpose is to provide a kind of fluid-filled vibration damping device of neotectonics, in the fluid-filled vibration damping device of changeable vibrationproof characteristic, can not need to switch on and just can keep the vibrationproof characteristic that is switched, and can avoid the increase of part number, thereby can realize by simple structure and easy manufacturing process.

The embodiments of the present invention that form in order to solve such problem have been put down in writing below.In addition, the constituting component that adopts adopts combination in any as far as possible in each mode of record.Be construed as embodiments of the present invention or technical characteristics and be not limited to following record, and be based on the record content of whole specification and accompanying drawing, perhaps those skilled in the art's inventive concept that can grasp and content of being familiar with from these records.

Promptly, a kind of fluid-filled vibration damping device of the present invention, wherein, first installation component and second installation component link up by the main rubber elastomer, and be formed with the compression chamber of enclosing incompressible fluid with the part of this main rubber elastomer formation wall portion, enclose the balance cylinder of incompressible fluid with the part of flexible membrane formation wall portion, this compression chamber and balance cylinder are interconnected by fluid flowing path, it is characterized in that, be provided with by coming and going the movable valve body that action switches to above-mentioned fluid flowing path connected state and dissengaged positions, adopt this movable valve body of electrical motor driven, and be provided with power-supply change-over mechanism from this electric motor to the transfer route of this movable valve body transmission of drive force, the rotary driving force of this electric motor is being delivered on this movable valve body as round driving force by this power-supply change-over mechanism.

In such abideing by in the fluid-filled vibration damping device of structure of the present invention, by being provided with power-supply change-over mechanism to the transfer route of movable valve body transmission of drive force from electric motor, can utilize the electric motor that produces rotary driving force, make movable valve body straight line come and go action.For example, can adopt cam mechanism as this power-supply change-over mechanism.

And,, under the non-power status of electric motor, prevent that the confining force of the displacement of round direction of action from acting on the movable valve body by on the transfer route of movable valve body, being provided with cam mechanism in the driving force that electric motor is produced.Thus, when driving movable valve body,, can make movable valve body carry out switch motion, and when keeping switching state, can not need to the electric motor energising and effective confining force is delivered on the movable valve body the electric motor energising.Therefore, can suppress power consumption, and can prevent from the heating that produces because of continuous energising from can realize the raising durability.

And acting on confining force on the movable valve body is not to need special part, but is produced by the cam mechanism of realizing coming and going action, can just can realize effective maintenance effect with less part number and easy structure.

In addition, so-called cam mechanism is meant following mechanism: comprise the cam with given shape on the either party in the live axle that is located at the rotary driving force that is subjected to electric motor and the movable valve body, be located at the sliding contacting part on the opposing party in these live axles and the movable valve body, by the slip of this cam and sliding contacting part, will be transformed into the round driving force of movable valve body at the rotary driving force that electric motor produces.

In fluid-filled vibration damping device of the present invention, also can be the structure that above-mentioned electric motor produces the rotary driving force of a direction

Adopted the round action that also can realize movable valve body under the situation of the structure of the rotary driving force that produces a direction at such electric motor by cam mechanism.And, be the structure that only produces the rotary driving force of a direction by making electric motor, make the simple structure of electric motor.

Best above-mentioned cam mechanism comprises in fluid-filled vibration damping device of the present invention: be arranged on the camming surface on the either party in the live axle of the rotary driving force that is subjected to above-mentioned electric motor and the above-mentioned movable valve body, be arranged on that the opposing party in this live axle and the movable valve body goes up and with the sliding contacting part of this camming surface sliding contact, and this camming surface is formed by the cam path that the intermediate portion on the round direction of action of this movable valve body on the either party in this live axle of this electric motor and this movable valve body forms, and this sliding contacting part inserts in this cam path.

The camming surface that constitutes cam mechanism is by be formed on the cam path realization on the either party in live axle and the movable valve body at the intermediate portion that comes and goes direction of action, sliding contacting part inserted in the cam path and with respect to the structure of camming surface sliding contact by adopting, utilize the snap action of sliding contacting part and cam path, can prevent that movable valve body from coming off from live axle.Butt by sliding contacting part and cam path also can limit the relative tilt between movable valve body and the live axle.By adopting sliding contacting part to insert the structure of cam path, sliding contacting part is at the both sides that come and go direction of action and the internal face butt of cam path.Therefore, the situation that movable valve body drives to either side on direction of action, the wall of cam path and the driving force that butt produced of sliding contacting part also work, and can realize the round action of movable valve body effectively.

And, as fluid-filled vibration damping device with above-mentioned cam path, for example also can suitably adopt following structure etc.: above-mentioned movable valve body has along coming and going the cylindrical portion that direction of action is extended, and this cylindrical portion is round the outer circumferential side configuration of above-mentioned live axle, axial intermediate portion in this cylindrical portion, be located at above-mentioned sliding contacting part on this live axle and be inserted in the above-mentioned cam path of inner peripheral surface upper shed of this cylindrical portion, constitute above-mentioned cam mechanism thus.

In fluid-filled vibration damping device of the present invention, above-mentioned cam mechanism also can comprise: be arranged on the camming surface on the either party in the live axle of the rotary driving force that is subjected to above-mentioned electric motor and the above-mentioned movable valve body, be arranged on that the opposing party in these live axles and the movable valve body goes up and with the sliding contacting part of this camming surface sliding contact, this camming surface is formed on either party's round direction of action one end face of this live axle and this movable valve body, and this sliding contacting part that is arranged on the opposing party of this live axle and this movable valve body is overlapping with butt state and this camming surface.

So also camming surface can be formed on the end face of the round direction of action of any in live axle and the movable valve body, make sliding contacting part overlapping, constitute cam mechanism with butt state and this camming surface.By adopting such camming surface and sliding contacting part,, just can realize the target cam mechanism by making movable valve body and live axle in the overlapping so extremely simple structure of the round direction of action of movable valve body at the cam mechanism that comes and goes the overlapping structure of direction of action.

In fluid-filled vibration damping device of the present invention, above-mentioned cam mechanism preferably includes: be arranged on the camming surface on the either party in the live axle of the rotary driving force that is subjected to above-mentioned electric motor and the above-mentioned movable valve body, be arranged on the sliding contacting part on the opposing party in these live axles and the movable valve body, come and go at this movable valve body of this camming surface at least one end of direction of action and be formed with the holding part of vertically expanding with the round direction of action of this movable valve body.

By be formed on and come and go the holding part of the direction expansion of direction of action quadrature like this in the part of camming surface, be positioned under the state of end in round direction of action at movable valve body, be positioned on the holding part by sliding contacting part, can bring into play snap action securely, more effectively obtain acting on the confining force of movable valve body.Therefore, can more stably realize keeping the connected state and the dissengaged positions of fluid flowing path by movable valve body.

In fluid-filled vibration damping device of the present invention, above-mentioned cam mechanism also can comprise: be arranged on the camming surface on the either party in the live axle of the rotary driving force that is subjected to above-mentioned electric motor and the above-mentioned movable valve body, be arranged on the sliding contacting part on the opposing party in these live axles and the movable valve body, and be provided with to this camming surface with the force application part of the direction application of force of this slip abutting part butt.

By being provided with such force application part, can prevent camming surface and sliding contacting part separately, can stablize and realize accurately the round action of the movable valve body that the slip of camming surface and sliding contacting part causes.

In addition, in having the above-mentioned fluid-filled vibration damping device that has force application part like that, above-mentioned force application part preferably is made of the helical spring of the outer circumferential face that is enclosed within above-mentioned movable valve body outward.Preferably, in above-mentioned movable valve body, be provided with towards above-mentioned live axle outstanding and and this live axle between constitute the valve stem of above-mentioned camming surface and above-mentioned sliding contacting part.And helical spring is enclosed within outward on this valve stem.

By adopting helical spring as force application part, can be by simple structure, the stable and movable valve body of yielding support is effectively realized by the stabilization of the round action of the movable valve body that cam mechanism caused easily and is improved precision.

In fluid-filled vibration damping device of the present invention, in above-mentioned movable valve body, preferably has the rotation limting mechanism, this rotation limting mechanism limits the rotation of movable valve body around its central axis by fastening, and this central axis extends along the round direction of action of above-mentioned movable valve body.

By being provided with the rotation limting mechanism that limits the rotation of movable valve body by fastening, can prevent to be passed on the movable valve body and to make movable valve body rotation at the rotary driving force that electric motor produces.Thus, for example, but highi degree of accuracy makes movable valve body come and go action, and can avoid reducing such problem owing to the friction between flexible membrane and the movable valve body makes the durability of flexible membrane.

In addition, have like this in the fluid-filled vibration damping device that rotates limting mechanism above-mentioned, on above-mentioned movable valve body, be provided with in the hollow of its round direction of action extension or solid valve stem, and being provided with respect to this valve stem is the guiding elements of interpolation state or overcoat state, is provided with the above-mentioned rotation limting mechanism of the above-mentioned movable valve body of restriction around the central axis rotation of this valve stem between this valve stem of this movable valve body and this guiding elements.

If adopt such structure as the rotation limting mechanism, the rotary driving force of electric motor just can be delivered on the movable valve body efficiently, can control the round action of movable valve body more accurately.

In fluid-filled vibration damping device of the present invention, also can above-mentioned compression chamber and above-mentioned balance cylinder be formed on across both sides by the partition member of above-mentioned second installation component supporting, and above-mentioned fluid flowing path comprises the first segment discharge orifice path and the second throttle orifice path that is formed on this partition member, this second throttle orifice path is formed on this partition member and is adjusted to than first segment discharge orifice path high frequency, and this second throttle orifice path switches to connected state and dissengaged positions by above-mentioned movable valve physical efficiency.

In having the fluid-filled vibration damping device of first, second throttle orifice path like this as the binodal discharge orifice structure of fluid flowing path, by the movable valve body that utilizes cam mechanism to come and go action switch be adjusted to high frequency more the connected state and the dissengaged positions of the second throttle orifice path, can take into account thus and bring into play effectively to the controlled frequency field of first segment discharge orifice path vibration vibration-isolating effect and to the vibration-isolating effect of the vibration of the controlled frequency field of the second throttle orifice path.

And, in the fluid-filled vibration damping device of the present invention that has partition member and throttle orifice path like this, preferably, the opening portion of the above-mentioned balance cylinder side of the above-mentioned second throttle orifice path is formed on the middle body of above-mentioned partition member, the opening portion of this balance cylinder's side of this second throttle orifice path and above-mentioned movable valve body dispose across above-mentioned flexible membrane is relative, and this movable valve body is not bonding with this flexible membrane, rotary driving force by the above-mentioned electric motor of above-mentioned cam mechanism is passed on this movable valve body, make this movable valve body come and go action, this movable valve body leaves and makes this second throttle orifice path become connected state from this flexible membrane thus, this movable valve body and this flexible membrane butt and this flexible membrane is pressed against on the opening portion of this balance cylinder's side of this second throttle orifice path make this second throttle orifice path become dissengaged positions.

Like this, the balance cylinder side opening portion of the second throttle orifice path and movable valve body clip flexible membrane and are positioned, the opening portion of balance cylinder's side of the second throttle orifice path is more advantageously realized the dissengaged positions of the second throttle orifice path by not leak fluid ground sealing of the movable valve body of pushing across flexible membrane thus.And movable valve body is not adhered to flexible membrane, and under the situation that the second throttle orifice path is communicated with, movable valve body separates from flexible membrane.Thus, the free length of flexible membrane can be obtained significantly, the hydraulic pressure absorption that resiliently deformable produced can be obtained effectively by flexible membrane.

Fluid-filled vibration damping device of the present invention also can be made of above-mentioned power-supply change-over mechanism at least one side of thread structure and worm and gear structure, the rotary driving force of this electric motor is delivered on this movable valve body as round driving force by at least one side in this thread structure and the worm gear structure.In such abideing by in the fluid-filled vibration damping device of structure of the present invention, the rotary driving force of electric motor is delivered on the movable valve body by the straight round driving of at least one side's conversion in thread structure and the worm and gear structure, fluid flowing path can be switched to connected state and dissengaged positions thus.Thus, utilize the rotary driving force of electric motor to realize the switching of vibrationproof characteristic.

And the rotary driving force that produces at electric motor is provided with thread structure and the worm gear structure that rotary driving force is transformed into round driving force on the transfer route of movable valve body transmission.Thus, the not "on" position that is not powered at electric motor is the engagement of the worm tooth by thread structure and worm gear structure also, and confining force acts on movable valve body.Therefore, in the not "on" position of electric motor, when the movable valve side was subjected to external force (for example, the fluid pressure in the compression chamber), movable valve body also was maintained at the specified action state, can stably obtain target vibrationproof characteristic.

And, can be not just can not make that effect has confining force on the movable valve body to the electric motor energising, therefore can realize suppressing the operation cost that power consumption brings reduction, reduce and switch on the heating that produced and improve durability.

In fluid-filled vibration damping device of the present invention, more preferably, have the rotation limting mechanism on above-mentioned movable valve body, this rotation limting mechanism limits the rotation of above-mentioned movable valve body around central axis by fastening, and this central axis extends along the round direction of action of above-mentioned movable valve body.

By being provided with such rotation limting mechanism, can prevent that rotary driving force that electric motor produces is passed on the movable valve body by being located at the thread structure on the driving force transfer route and the friction of worm gear structure etc., can prevent that movable valve body is driven in rotation.Thus, the stroke constant of round action of the movable valve body that rotary driving force caused of electric motor can be made, the switching controls of fluid flowing path can be realized accurately.

In fluid-filled vibration damping device of the present invention, also can be provided with the live axle that drives by above-mentioned electric motor rotation with screw section, and the threaded joints that is threaded with this screw section is formed on the above-mentioned movable valve body, comprises these screw sections and threaded joints and constitutes at least one side in above-mentioned thread structure and the above-mentioned worm and gear structure.

The threaded joints that constitutes thread structure and worm gear structure like this is formed on the movable valve body, can realizes fluid-filled vibration damping device of the present invention with fairly simple structure.

In fluid-filled vibration damping device of the present invention, also can be that above-mentioned compression chamber and above-mentioned balance cylinder are formed on the both sides across the partition member that is supported by above-mentioned second installation component, and above-mentioned fluid flowing path comprises the first segment discharge orifice path and the second throttle orifice path that is formed on this partition member, this second throttle orifice path is formed on this partition member and is adjusted to than first segment discharge orifice path high frequency, and this second throttle orifice path switches to connected state and dissengaged positions by above-mentioned movable valve physical efficiency.

In having the fluid-filled vibration damping device of first, second throttle orifice path like this as the binodal discharge orifice structure of fluid flowing path, by the movable valve body switching that utilizes cam mechanism, worm and gear structure to come and go action be adjusted to high frequency more the connected state and the dissengaged positions of the second throttle orifice path, can optionally obtain thus the controlled frequency field of first segment discharge orifice path vibration vibration-isolating effect and to the vibration-isolating effect of the vibration of the controlled frequency field of the second throttle orifice path, all can bring into play vibration-isolating effect effectively to these any vibrations.

Have partition member and first like this above-mentioned, in the fluid-filled vibration damping device of the present invention of the structure of the second throttle orifice path, the opening portion of the above-mentioned balance cylinder side of the above-mentioned second throttle orifice path is formed on the middle body of above-mentioned partition member, the opening portion of this balance cylinder's side of this second throttle orifice path and above-mentioned movable valve body dispose across above-mentioned flexible membrane is relative, and this movable valve body is not bonding with this flexible membrane, the rotary driving force of above-mentioned electric motor is passed on this movable valve body by at least one side in above-mentioned cam mechanism and the above-mentioned worm and gear structure, make this movable valve body come and go action, thereby make this movable valve body separately make this second throttle orifice path become connected state from this flexible membrane, this movable valve body and this flexible membrane butt and this flexible membrane is pressed against on the opening portion of this balance cylinder's side of this second throttle orifice path make this second throttle orifice path become dissengaged positions.

Like this, the balance cylinder side opening portion of the second throttle orifice path and movable valve body clip flexible membrane and are positioned, the opening portion of balance cylinder's side of the second throttle orifice path is more advantageously realized the dissengaged positions of the second throttle orifice path by not leak fluid ground sealing of the movable valve body of pushing across flexible membrane thus.And movable valve body is not adhered to flexible membrane, and under the situation that the second throttle orifice path is communicated with, movable valve body separates from flexible membrane.Thus, the free length of flexible membrane can be obtained significantly, the hydraulic pressure absorption that resiliently deformable produced can be obtained effectively by flexible membrane.

The present invention also provides a kind of electric actuator, and it is used for above-mentioned fluid-filled vibration damping device, by to electric motor energising, utilizes the rotary driving force of electric motor and makes output link come and go action.

Promptly, known in the past have by energising make the output link straight line come and go the electric actuator of action, for example, between between the member that constitutes the vibration transfer system and in the fluid-filled vibration damping device with these member vibrationproof bindings or vibrationproof supporting, be used as the actuator of switching vibrationproof characteristic etc.In addition, show such output link that makes at 2000-No. 161457 communiques of TOHKEMY and come and go the electric actuator of action.

Come and go in the electric actuator of action at such output link that makes, must control the position of output link sometimes accurately.For example, come in the fluid-filled vibration damping device of structure of the connected state of switch fluids stream and dissengaged positions in the round action of the output link that utilizes electric actuator, in order to realize the switching effect of vibrationproof characteristic effectively, be preferably in the positioning control of carrying out output link in the electric actuator accurately.

Therefore, as the means of the position of controlling output link, for example, adopted following method: utilize position sensors such as phototube and limit switch directly to detect the position of output link,, control the action of electric actuator based on this testing result in the past.

But, in having used the positioning control parts of such position transducer, can not avoid the complicated of the increase of part number and structure, and the maximization of device also is easy to become problem.And, by adopting the position transducer of high price, also might cause the increase of cost.

On the other hand, measure in advance or the prediction output link is coming and going the time that direction of action arrives the displacement end, control energising according to this time, also can implement to control the position of output link.

But, particularly under conditions such as power supply voltage generation error, adopt under the situations such as actuating force source of electric motor as output link, according to the electric power of supplying with electric motor, the displacement amount of the time per unit of output link produces difference, therefore extremely difficult highi degree of accuracy and stably control the position of the round direction of action of output link.

At this, the purpose of the problem that the present invention also will solve is to provide a kind of electric actuator of neotectonics, it can be applicable to above-mentioned fluid-filled vibration damping device preferably, just can control the position of the round direction of action of output link accurately with simple structure.

Promptly, electric actuator of the present invention, it has output link, this output link will be transformed into linear drives power by the rotary driving force of the electric motor of dc powered by power-supply change-over mechanism and be come and gone by straight line and drive, it is characterized in that, be provided with the switching part that the galvanic polarity of the above-mentioned power electric motors of subtend is switched, handover operation by this switching part, make the sense of rotation difference of this electric motor, the driving direction of above-mentioned output link be switched toward direction and compound to, be fed in first power supply line of this electric motor will yearning for the direct current that direction drives the polarity of this output link, be provided with first switch part, this first switch part has the displacement along with this output link, carry out first electrode and first brush of relative displacement with contact condition, this first brush is disengaged contact condition from this first electrode disengagement, this first power supply line is cut off, stipulate the shift end of this output link yearning direction thus, will to compound to the powered by direct current of the polarity that drives this output link to second power supply line of this electric motor, be provided with the second switch parts, these second switch parts have the displacement along with this output link, carry out second electrode and second brush of relative displacement with contact condition, this second brush is disengaged contact condition from this second electrode disengagement, this second power supply line is cut off, stipulate thus this output link to compound to shift end, and, when this first switch part is in off-position, these second switch parts are kept coupled condition, and when these second switch parts were in off-position, this first switch part was kept coupled condition.

Abideing by in the electric actuator of structure of the present invention like this, be located at the electrode in the power supply line and the contact condition and the contactless state of brush by switching, optionally cut off the powered by direct current of each side's polarity first, second power supply line, the shift end of regulation output link to electric motor.Thus, can stipulate the stroke of the round action of output link with simple construction of stable ground.

When output link was positioned at shift end, a side switch part was cut off, and the opposing party's switch part is kept coupled condition.Thus, by cutting off a switch part, make output link stop at shift end, and kept coupled condition, output link promptly can be fed to electric motor from a shift end to the direct current of the polarity of the distolateral driving of another displacement by another switch part.Therefore, in the round action of output link, can set displacement amount accurately, and can make actuating member promptly transfer to drive condition from halted state.

In electric actuator of the present invention, be preferably in above-mentioned first power supply line and be provided with first rectification part, in above-mentioned second power supply line, be provided with second rectification part, this first rectification part allows to yearn for direction and drives the direct current of polarity of above-mentioned output link to above-mentioned power electric motors, and stop to compound to the direct current of the polarity that drives this output link to power electric motors, this second rectification part allows to compound to the direct current of the polarity that drives this output link to power electric motors, and stop to yearn for the direct current of polarity that direction drives above-mentioned output link to above-mentioned power electric motors, comprise these first rectification parts and second rectification part and constitute above-mentioned switching part.

Utilize the rectified action of first, second such rectification part, can with simple structure realize yearning for direct current that direction drives the polarity of output link be fed to electric motor first power supply line, will be fed to second feeder circuit of electric motor to compound to the direct current of the polarity of driving output link.

In electric actuator of the present invention, preferably, above-mentioned powershift mechanism comprises power transfer member, be arranged on this power transfer member as above-mentioned first electrode of the side and above-mentioned second electrode with as the opposing party's above-mentioned first brush and the either party among above-mentioned these both sides of second brush, this first electrode and this second electrode are adapted in the direction of action corresponding with the round action of above-mentioned output link of this power transfer member and extend, and direction of action at this power transfer member, stagger mutually in the end of the end of this first electrode and this second electrode, and in the direction of action of this power transfer member, this first brush is arranged on identical position mutually with this second brush.

Like this, be installed on the power transfer member as a side first electrode and second electrode with as the opposing party's first brush and the either party among these both sides of second brush, first electrode and second electrode in their bearing of trend configuration mutually with staggering, and first brush and second brush are configured in mutual positions aligning at the bearing of trend of electrode, the coupled condition of the switch part that is made of electrode and brush and dissengaged positions are along with the action of power transfer member is switched thus, and output link stably comes and goes action with prescribed stroke.

Also can be in electric actuator of the present invention, be arranged on the above-mentioned output link as above-mentioned first electrode of the side and above-mentioned second electrode with as the opposing party's above-mentioned first brush and the either party among above-mentioned these both sides of second brush, and this first electrode and this second electrode are arranged in the round direction of action straight-line extension of this output link, stagger on the round direction of action of this output link mutually in the end of these first electrodes and second electrode.

According to this structure,, can realize switching accurately according to the switch part of the displacement of output link by any of electrode and brush is located on the output link.Particularly, first, second electrode is adapted to the round direction of action straight-line extension at output link, and the end of these first electrodes and second electrode in the bearing of trend configuration mutually of these electrodes with staggering, be positioned under the state of shift end at output link thus, can realize the coupled condition of the either party in first switch part and the second switch parts and the opposing party's dissengaged positions effectively.

In electric actuator of the present invention, be preferably in from above-mentioned electric motor and be provided with at least one side thread structure and the worm gear structure, the rotary driving force of this electric motor is comprised at least one side that this thread structure and this worm gear are constructed as coming and going the above-mentioned power-supply change-over mechanism that driving force is delivered on this output link to the transfer route of above-mentioned output link transmission of drive force.

By such thread structure and worm gear structure are located at from electric motor on the driving force transfer route of output link, the rotary driving force of electric motor can be transformed into linear drives power and it is delivered on the output link, and engagement by the worm tooth in performance thread structure and the worm gear structure, not under the situation of electric motor energising, confining force is acted on the output link, stably output link is remained on the switching displacement state.Like this, just can not obtain the confining force of output link effectively to the electric motor energising, therefore when keeping the switching state of output link, do not need to power continuously problems such as the heating that can avoid being produced to the electric motor energising continuously, the increase of consumption electric power to electric motor.

On the other hand, fluid-filled vibration damping device of the present invention first installation component and second installation component link up by the main rubber elastomer, and be formed with the compression chamber of enclosing incompressible fluid with the part of this main rubber elastomer formation wall portion, enclose the balance cylinder of incompressible fluid with the part of flexible membrane formation wall portion, these compression chambers and balance cylinder are interconnected by fluid flowing path, it is characterized in that, utilize the round driving that constitutes the above-mentioned output link of each described electric actuator in the technological scheme 18～22 to switch the connected state and the dissengaged positions of above-mentioned fluid flowing path.

Like this, the valve member that switches as the connected state and the dissengaged positions of convection cell stream, by utilizing the output link of electric actuator of the present invention, can realize the switching controls of fluid flowing path accurately, can stably realize the switching of target vibrationproof characteristic.

Description of drawings

Fig. 1 is the sectional view of the engine for automobile supporting of first mode of execution of the present invention.

Fig. 2 is the sectional view of connected state of the second throttle orifice path of this engine mounting of expression

Fig. 3 is the unfolded drawing of inner peripheral surface of surrounding wall portion of the valve member that engine mounting adopted of expression first mode of execution.

Fig. 4 is 4-4 sectional views of Fig. 1.

Fig. 5 is the sectional view as the engine for automobile supporting of second mode of execution of the present invention.

Fig. 6 is the sectional view as the connected state of the second throttle orifice path of the engine mounting of representing second mode of execution

Fig. 7 is the unfolded drawing of inner peripheral surface of surrounding wall portion of the valve member of expression other modes that engine mounting of the present invention adopted.

Fig. 8 is that expression is a unfolded drawing of representing the inner peripheral surface of the surrounding wall portion of the valve member of other modes that engine mounting of the present invention adopted.

What Fig. 9 was expression as the engine mounting of the 3rd mode of execution of the present invention wants portion's enlarged view.

Figure 10 is the sectional view as the engine for automobile supporting of the 4th mode of execution of the present invention.

Figure 11 is the sectional view of connected state of the second throttle orifice path of the engine mounting of expression the 4th mode of execution

Figure 12 is 12-12 sectional views of Figure 11.

Figure 13 is the sectional view as the engine for automobile supporting of the 5th mode of execution of the present invention.

Figure 14 is the sectional view as the engine for automobile supporting of the 6th mode of execution of the present invention.

Figure 15 is the sectional view of the expression electric actuator that supporting is adopted as the engine for automobile of the 7th mode of execution of the present invention, is 15-15 the sectional view of Figure 17.

Figure 16 is positioned at 16-16 the sectional view of Figure 17 of the state of upper end as movable link in the electric actuator that is illustrated in the 7th mode of execution.

Figure 17 is 17-17 the sectional view of Figure 16.

Figure 18 is the illustraton of model of electric actuator that constitutes the engine mounting of the 7th mode of execution.

Figure 19 is illustrated in the illustraton of model that movable link in the electric actuator of the 7th mode of execution is positioned at the state of lower end.

Figure 20 is illustrated in the illustraton of model that movable link in the electric actuator of the 7th mode of execution is positioned at the state of upper end.

Figure 21 is the sectional view of engine mounting with electric actuator of the 7th mode of execution.

Figure 22 is illustrated in the engine mounting of the 7th mode of execution, the sectional view of the state that the second throttle orifice path is connected.

Figure 23 is the sectional view of expression as the engine mounting of another embodiment of the present invention.

Embodiment

In order to make the present invention clearer, with reference to the accompanying drawings embodiments of the present invention are elaborated below.

At first, be the mode of execution of the engine mounting 10 used of automobile shown in Fig. 1,2 as fluid-filled vibration damping device of the present invention.This engine mounting 10 has support body 11, accessory 12 is installed and as second of second installation component accessory 14 is installed as first of first installation component to have the structure that links up mutually by main rubber elastomer 16.And, first installs accessory 12 is installed on the power unit that the side's member that constitutes the vibration transfer system is not shown automobile, and second installs accessory 14 is installed in that to constitute vibration transfer the opposing party of system member be on the vehicle body of not shown automobile, and these dynamic components and vehicle body are linked up by vibrationproof by engine mounting 10 thus.

In more detail, first installs the member that accessory 12 is bulks of being formed by iron and aluminum alloy etc., and in the present embodiment, the circular block shape is formed at top, and the bottom forms, and diameter becomes big circular bulk gradually along with going towards the top.Be provided with outstanding upward construction bolt 18 integratedly in first upper end portion that accessory 12 is installed.

On the other hand, second installs accessory 14 has the thin large diameter general cylindrical shape shape of wall, for first the member of the high rigidity that accessory 12 similarly forms by iron and aluminum alloy etc. is installed.On the upper end portion, be provided with the stepped part 20 of inward flange shape, form along with extending diameter upward simultaneously and become big taper portion 22 gradually at interior all side ends of stepped part 20.And, be formed with in the upper end portion of taper portion 22 along with flange shape 24 of axis normal direction expansion.

This first installation accessory 12 and second is installed the opening portion side of accessory 14 separations in flange shape 24 side that is provided with the second installation accessory 14, is configured on the same central axis.And main rubber elastomer 16 is installed accessory 12 and second between first and is installed between the accessory 14, and the first installation accessory 12 and second is installed accessory 14 and is bonded mutually by main rubber elastomer 16.

Main rubber bullet injection body 16 is formed by the rubber bullet injection body of the roughly truncated cone shape with heavy wall, is formed with the major diameter recess 26 in the semi-spherical shape or the mortar shape of end face opening in the end of larger diameter side.And, the underpart of inserting and vulcanizing the bonding first installation accessory 12 in the smaller diameter side end of main rubber elastomer 16, and the upper end part that comprises taper portion 22 of the larger diameter side end outer circumferential face of main rubber elastomer 16 and the second installation accessory 14 is overlapping and sulfuration is bonded together.Thus, the first installation accessory 12 and second is installed accessory 14 and is linked up by main rubber elastomer 16 elasticity, and second opening portion that a side of accessory 14 is installed is not sealed to leak fluid by main rubber elastomer 16.As mentioned above, the main rubber elastomer 16 of present embodiment has the integrated vulcanizing formed article that the first installation accessory 12 and second is installed accessory 14 with forming as one.

And, form the caulking gum layer 28 of large diameter tubular below axially with thin-walled in the outer periphery portion of the larger diameter side end of main rubber elastomer 16.Sealing rubber layer 28 covers, is fixed on second and installs on the inner peripheral surface of accessory 14, goes up sealed rubber layer 28 and covers for roughly whole of the inner peripheral surface of the lower portion of the stepped part 20 of the second installation accessory 14.At the opening peripheral portion of major diameter recess 26, be formed with in position than the more inner all sides of caulking gum layer 28 along roughly with the step surface 30 of the ring-type of axis normal direction expansion.

Be equipped with barrier film 32 at second open part that the opposing party of accessory 14 is installed.Barrier film 32 is the rubber membrane of the thin large diameter roughly circular plate shape of wall, has sufficient slackness vertically at outer peripheral portion.The middle body of barrier film 32 is the central abutting part 34 of the thickness circular plate shape thicker than outer peripheral portion.And, form the bonding part 36 of toroidal in the outer periphery portion of barrier film 32.

Sulfuration is bonded with standing finish 38 on the bonding part 36 that is provided with barrier film 32.Standing finish 38 is members of the high rigidity that formed by iron etc., has large diameter roughly toroidal, is fixed in bonding part 36 to bury state underground.As mentioned above, the barrier film 32 of present embodiment has the integrated vulcanizing formed article of standing finish 38 with forming as one.

And the integrated vulcanizing shape product of barrier film 32 are installed on the integrated vulcanizing formed article of the main rubber elastomer 16 with the first installation accessory 12 and second installation accessory 14.That is, after second installation opening portions accessory 14 and main rubber elastomer 16 opposition sides insert barrier films 32, to second accessory 14 is installed and is applied undergauge processing, thus with the standing finish 38 nested open parts that are fixed in the second installation accessory 14.Thus, barrier film 32 is mounted to not leak fluid ground covering second the opposing party's of accessory 14 open part is installed.

Be installed to second at this barrier film 32 and install under the state of accessory 14,, between the axial opposing side of main rubber elastomer 16 and barrier film 32, be formed with and enclosed incompressibility with external isolation ground and flow fluid-filled regional 40 of woods in second interior all sides that accessory 14 is installed.In addition, do not limited especially, for example, can preferably adopt ethylene glycol (alkylene glycol), polyethyleneglycol, silicone oil and their mixed solution enclosing fluid-filled regional 40 incompressible fluid.In order to obtain the vibration-isolating effect based on the mobilization of fluid described later effectively, preferably adopting viscosity is the following low viscous flow body of 0.1Pas.

In fluid-filled regional 40, accommodate and dispose partition member 42, accessory 14 supportings are installed by second.Partition member 42 comprises partition member main body 44 and cover plate accessory 46.

Partition member main body 44 has the thick roughly circular plate shape of thickness, is formed by metals such as the synthetic resin of hard and aluminum alloys.The radially middle body of partition member main body 44 be formed with towards below the central recess 48 of circle of opening.The radially middle body of partition member main body 44 also form towards above the central protrusion 49 of outstanding minor diameter.

Outer periphery portion in partition member main body 44 is formed with first all grooves 50.First all groove 50 openings extend along circumferential in the outer periphery portion of partition member main body 44 continuously with the specific length less than a week on the outer circumferential face of partition member main body 44.Also the radially intermediate portion in partition member main body 44 is formed with groove 52.Groove 52 openings on the upper-end surface of partition member main body 44, central recess 48 and first all grooves 50 radially between with less than the specific length in a week along circumferentially extending continuously.In addition, an end of this groove 52 is by being communicated with central recess 48 along the path 54 with the extension of axis normal direction.

On the other hand, cover plate accessory 46 is for having the roughly metal member of circular plate shape.The outer peripheral portion of the cover plate accessory 46 of present embodiment is positioned at the axial top of middle body by step.Also the middle body at cover plate accessory 46 is formed with circular through hole 56.Through hole 56 is the corresponding holes of shape with the central protrusion 49 that is formed on partition member main body 44.

And, constitute the partition member 42 of present embodiment mutually by these partition member main bodys 44 and cover plate accessory 46.Promptly, cover plate accessory 46 overlaps the upper-end surface of partition member main body 44, and the outstanding central protrusion 49 that is located on the partition member main body 44 is embedded run through the through hole 56 that is formed on the cover plate accessory 46, cover plate accessory 46 is fixed on the partition member body 44 thus, constitutes partition member 42.

In this partition member 42, partition member main body 44 and cover plate accessory 46 are piled up mutually closely by middle body radially, and by separate location, predetermined distance ground vertically at outer peripheral portion.And,, be formed with between the opposing side of these partition member main bodys 44 and cover plate accessory 46 second all grooves 58 along extending circumferentially at partition member main body 44 and cover plate accessory 46 separated outer peripheral portions.This second all groove 58 is not indicated in the drawings, extends continuously along circumferential with the specific length less than a week.In addition, between the circumferential end of second all grooves 58, be provided with the not shown next door integrally formed, in the length that circumferentially second all grooves 58 is separated into less than a week with partition member main body 44.

Behind assembling partition member main body 44 and cover plate accessory 46, an end of an end of first all grooves 50 and second all grooves 58 is connected by the be connected window 60 of opening on the upper-end surface of partition member main body 44 each other in an end of first all grooves 50.Thus, form with less than the specific length in two weeks spiral helicine all grooves 62 by first all grooves 50 and second all groove 58 along extending circumferentially.

The partition member 42 that constitutes by partition member main body 44 and cover plate accessory 46 is accommodated and is configured in fluid-filled regional 40 like this.That is, before barrier film 32 was installed on the second installation accessory 14, partition member 42 embedded the second installation accessory 14 from the opening portion of a side opposite with the side that 16 sulfurations of main rubber elastomer are bonding.Afterwards, barrier film 32 embeds the second installation accessory 14 from this opening, to second accessory 14 is installed and is implemented undergauge processing such as all directions undergauges, partition member 42 and barrier film 32 nested being fixed on the second installation accessory 14 thus.

Under the setting of this partition member 42 and barrier film 32, the outer peripheral portion of the upper-end surface of partition member 42 is crimped on the stepped part 30 of main rubber elastomer 16, and the outer peripheral portion of the lower end surface of partition member 42 is crimped on the standing finish 38 by bonding part 36, respectively by not leak fluid ground sealing.The outer circumferential face of partition member 42 also is not piled up with the second installation accessory 14 on leak fluid ground by caulking gum layer 28.Thus, fluid-filled regional 40 are divided into two down in the axial direction across partition member 42, constitute the part of wall portion with main rubber elastomer 16 across a side of partition member 42, formation causes the compression chamber 64 of pressure oscillation by the resiliently deformable of main rubber elastomer 16, and, form the balance cylinder 66 that allows the volume distortion by the resiliently deformable of barrier film 32 constituting the part of wall portions with barrier film 32 across the opposite side of partition member 42.In addition, these compression chambers 64 and balance cylinder 66 are enclosed respectively the incompressible fluid of being enclosed in fluid-filled regional 40.

The outer circumferential side opening portion of all grooves 62 that is formed on the outer periphery portion of partition member 42 is installed leak fluid ground sealing of accessory 14 by second.One end of all grooves 62 is communicated with compression chamber 64 by the not shown connection window that is formed on the cover plate accessory 46, and the other end of all grooves 62 is communicated with balance cylinder 66 by the connection window 68 that is formed on the partition member main body 44.Thus, along circumferentially extending and utilizing all grooves 62 of partition member 42 to form as the first segment discharge orifice path 70 of the fluid flowing path that compression chamber 64 and balance cylinder 66 are interconnected with specific length.

In the present embodiment, the resonant frequency of the fluid that flows by first segment discharge orifice path 70 is adjusted to based on the resonance effect of this fluid and the low frequency region about the 10Hz that is equivalent to engine luggine etc. is brought into play effective vibration-isolating effect (high attenuating).

And, the opening portion that is formed on the groove 52 on the partition member 42 is covered by cover plate accessory 46, one end of groove 52 is communicated with compression chamber 64 by the not shown connection window that is formed on the cover plate accessory 46, and the other end of groove 52 is communicated with balance cylinder 66 by central recess 48.Thus, utilize the groove 52 of partition member 42 and central recess 48 to form as the second throttle orifice path 72 along the fluid flowing path that circumferentially extends and compression chamber 64 and balance cylinder 66 are interconnected with the length of regulation.

In the present embodiment, the resonant frequency of the fluid that flows by the second throttle orifice path 72 is adjusted to based on the resonance effect of this fluid and intermediate frequency or high-frequency region about the 20Hz～40Hz that is equivalent to engine luggine etc. is brought into play effective vibration-isolating effect (the low spring effect of moving).

In addition, throttle orifice path 70,72 adjustment, for example, consider each wall spring rigidity based on compression chamber 64 and balance cylinder 66, promptly based on make these each chambers 64,66 change each elastic deformation amount's of required corresponding main rubber elastomer 16 of pressure variety of unit volume and barrier film 32 etc. characteristic value, and can be by regulating throttle orifice path 70,72 path-length and passage sections are amassed and are carried out, in general, can throttle orifice path 70 will be passed through, the phase place of 72 pressure oscillations of transmitting change and the frequency that becomes resonant condition roughly as throttle orifice path 70,72 adjust frequency held.

Support body 11 with present embodiment of such structure is assembled on the accessory bracket 74.Accessory bracket 74 is members of the high rigidity that forms such as iron, has the nesting part 76 that is used to embed support body 11.Nesting part 76 has as a whole the round-ended cylinder shape is arranged, and has lip part 78 in the upper end portion.And the outer circumferential face of nesting part 76 waits the shank 80 that is fixed with ring-type by welding.Many places on this shank 80 on circumference are run through and are formed with not shown bolt hole, and by the same not shown fixed-use bolt in through bolt hole, shank 80 is fixed on the vehicle body by screw thread.

And support body 11 is embedded into the nesting part 76 of accessory bracket 74 from the upside opening portion, and the second installation accessory 14 is pressed into and is fixed in the nesting part 76, and support body 11 is fixed on the accessory bracket 74 by nested thus.In addition, in the present embodiment, be located at second flange shape 24 of upper end that accessory 14 is installed, second accessory 14 be installed and nesting part 76 carries out relative positioning thus from top and lip part 78 butts that are located at the upper end of nesting part 76.

At this, on accessory bracket 74, be equipped with actuator 82.Actuator 82 is configured in the below of support body 11, is positioned on the bottom wall portion of nesting part 76.In more detail, actuator 82 has electric motor 84.

Electric motor 84 is existing motor, has the rotating shaft 86 as live axle.And by switching on from being located at outside power supply unit 88, rotating force acts in the rotating shaft 86, and rotating shaft 86 is rotated driving around central axis.Particularly in the present embodiment, rotating shaft 86 is driven to direction rotation by switching on to electric motor 84.In addition, can adopt various known motors (motor) such as DC motor with separate excitation as electric motor 84.

Run through the pin 90 that is provided with as sliding contacting part in the rotating shaft 86 of electric motor 84.Pin 90 has the circular connecting rod shape of minor diameter, inserts radially to be applied in the circular port of the minor diameter in the rotating shaft 86, is fixed in the rotating shaft 86 by means such as bonding.In addition, pin 90 radially extensions in rotating shaft 86, its two end portions is projected into the radial outside of the outer circumferential face of rotating shaft 86.

On circuit, be provided with control gear 92 with electric motor 84 and power supply unit 88 electrical connections.Control gear 92 for example comprises the sensor (known velocity transducer etc.) of the travelling state that detects automobile etc., switches the mechanical type contact control gear that comes the rotation of control rotating shaft 86 and stop to electric motor 84 energisings or no electric circuit according to the testing result of this sensor.By this control gear 92, rotating shaft 86 is controlled so as to each half-twist.In addition, the energising and the cold control gear 92 that switch to electric motor 84 can adopt known in the past device, in this description will be omitted.

Electric motor 84 is installed on the support member 94.Support member 94 has the thick toroidal of thickness, in the present embodiment, is formed by the synthetic resin of hard.And, be provided with towards the abutting part 96 of outer circumferential side expansion in the upper end portion of support member 94, and the outer periphery portion of abutting part 96 is outstanding towards the top.

And, be formed with the tube portion 98 that keeps in the inner circumference edge portion of support member 94.Keep tube portion 98 to be the general cylindrical shape shape, extend towards the top from the inner circumference edge portion of support member 94.Keep tube portion 98 its radially the relative part of a direction be formed with a pair of engaging notch part 100,100 of opening in interior all sides and upper-end surface.This engaging notch part 100 is the groove shape that extends with specific length vertically, and circumferentially bi-side are expanded in parallel to each other in the present embodiment.

And electric motor 84 embeds the central hole of support member 94 and is fixed, and makes the rotating shaft 86 of electric motor 84 extend on the center line of the central hole of support member 94.Thus, rotating shaft 86 is positioned at the position that separates with all sides that keep tube portion 98.

The head portion of rotating shaft 86 covers the valve member 102 as movable valve body.Valve member 102 has the inverted round-ended cylinder shape that roughly has, and the valve stem of outstanding tube shape constitutes by the valve head of circular plate shape with towards the below, in the present embodiment, is formed and is realized lightweight by the synthetic resin of hard.Also be formed with and push lip part 104 towards outer circumferential side expansion in valve member 102 upper end portions.The lip part 104 of pushing of present embodiment is chamfered to be outer periphery portion and is roughly semi-spherical shape in the longitudinal section.

Also be formed with in the underpart of valve member 102 from the relative part of a direction radially to the side-prominent a pair of engaging protrusion 106,106 of periphery.Engaging protrusion 106 is roughly block projection, and circumferential both ends of the surface are parallel to each other.The circumferential width dimensions of snap fit tabs 106 be formed on the circumferential width dimensions that engages notch part 100 that keeps in the tube portion 98 about equally, and the axial dimension of engaging protrusion 106 is enough littler than the axial dimension that engages notch part 100.

At this, on valve member 102, be formed with cam path 108.Cam path 108 is formed on the intermediate portion of round direction of action described later (axially) in the surrounding wall portion of valve member 102 of tubular.Cam path 108 is opening grooves in interior all sides of the surrounding wall portion of valve member 102, is formed on continuously on the circumferential whole periphery.Cam path 108 is circumferentially periodically changing axial formation position shown in the unfolded drawing of Fig. 3.In addition, the camming surface of present embodiment is made of the upper and lower surface (width direction bi-side) of cam path 108.In being the valve member 102 that the round-ended cylinder shape is arranged, constitute the cylindrical portion of present embodiment by the surrounding wall portion of axially extended cylindrical shape.

More particularly, in cam path 108, be formed with a pair of upper end holding part 109 in the relative part of a direction radially, and be formed with lower end holding part 110 in the relative part of a radially direction of a radially direction quadrature that is positioned at this a pair of upper end holding part 109.Upper end holding part 109 and lower end holding part 110 are at the groove that circumferentially extends with specific length with the upper edge, plane of axis normal.The upper end holding part 109 axially be positioned at lower end holding part 110 above.

Between circumferentially adjacent upper end holding part 109 and lower end holding part 110, be formed with inclined lead part 111, the circumferential end of upper end holding part 109 and the circumferential end of lower end holding part 110 are connected with each other by inclined lead part 111, and the cam path 108 that extends in whole periphery is formed by these upper and lower end holding parts 109,110 and inclined lead part 111.In addition, as seen from the above description, in the present embodiment, upper end holding part 109 and lower end holding part 110 lay respectively at the upper and lower end parts of cam path 108.In the present embodiment, the attachment portion of upper end holding part 109, lower end holding part 110 and inclined lead part 111 does not have the smooth connection of broken line ground, and it is outstanding upward to bend to inclined lead part 111 slightly.

In a word, in the present embodiment, in radially relative position (circumferentially staggering 180 ° position), cam path 108 axially is being positioned at identical height.In Fig. 3, be recited as under the situation that 0 ° part is formed with upper end holding part 109, also be formed with upper end holding part 109, and be formed with lower end holding part 110 in the part of circumferentially stagger 90 ° (among Fig. 8 90 ° and 270 °) in 180 ° the part of circumferentially staggering.

And the valve member 102 with such cam path 108 is installed in the rotating shaft 86 of electric motor 84.That is, valve member 102 covers rotating shaft 86 from the top, and the surrounding wall portion of valve member 102 is positioned to separate with the outer circumferential side of rotating shaft 86 and turns up the soil round rotating shaft 86.

And the pin 90 that is installed in the rotating shaft 86 embeds in the cam path 108 that is formed on the valve member 102 slidably.Thus, the linking portion at rotating shaft 86 and valve member 102 is provided with the cam mechanism that is made of pin 90 and cam path 108.In addition, the radially relative part of cam path 108 is formed on axial identical position (highly), therefore radially inserts in the cam path 108 towards two side-prominent pins 90, and valve member 102 is not configured on the same central axis obliquely with respect to rotating shaft 86 thus.

In addition, in the present embodiment, for example, valve member 102 is divided into the upper portion of cam path 108 and comprises these two-part of lower portion of cam path 108, this upper portion and lower portion are superimposed vertically and clip pin 90 by upper portion and lower portion, to sell 90 and insert in the cam path 108, and the superimposed part of upper portion and lower portion is bonding by means such as ultrasonic wave built-up welding, valve member 102 is installed in the rotating shaft 86.

Rotating shaft 86 by electric motor 84 is positioned at all sides that keep tube portion 98, and the valve stem of valve member 102 is inserted and kept in the tube portion 98.At this, as shown in Figure 4, circumferentially keeping engaging notch part 100 position alignment in the tube portion 98 with being formed on the integrally formed engaging protrusion 106 in the underpart of valve member 102, each engaging protrusion 106 embedding respectively engages notch part 100.And by the circumferential snap action of engaging protrusion 106 and engaging notch part 100, valve member 102 circumferentially can not be rotated with respect to maintenance tube portion 98 by fastening.That is, in the present embodiment, the maintenance tube portion 98 that is configured in the valve stem of valve member 102 by overcoat constitutes guiding elements.Be held engaging notch part 100 fastenings of a portion 98 by the engaging protrusion 106 of valve member 102, the rotation limting mechanism around the rotation of central axis of formation control valve member 102 between the valve stem that keeps tube portion 98 and valve member 102.

At this,, be delivered on the valve member 102 because energising is transformed into round driving force at the rotary driving force that electric motor 84 produces by the cam mechanism that is made of pin 90 and cam path 108.And, by the energising of control to electric motor 84, can be with valve member 102 drive displacement to axial assigned position.Axial round action to valve member 102 describes below.

At first, be installed in pin 90 in the rotating shaft 86 of electric motor 84 under the state that is positioned on the upper end holding part 109 of cam path 108, valve member 102 is positioned at the lower end of driving direction.Under this state, be located at the engaging protrusion 106 and the lower axial end face butt that engages notch part 100 of the lower end of valve member 102.

Then, by switching on to electric motor 84 from power supply unit 88, the rotating shaft 86 of electric motor 84 is driven in rotation.At this, control by control gear 92 to the energising of electric motor 84, the rotating shaft 86 of electric motor 84 was circumferentially being rotated for 1/4 week at every turn thus.And rotating shaft 86 rotation is during 1/4 week, be arranged in pin 90 that the radially direction of rotating shaft 86 extends along cam path 108 in circumferential slip, be positioned on the lower end holding part 110 of cam path 108.At this, rotating shaft 86 can not be in axial displacement, therefore be fixed on pin 90 in the rotating shaft 86 with respect to valve member 102 when the axial lower direction relative displacement, valve member 102 is by to axial top drive displacement.

Particularly in the present embodiment, the fastening that the rotation of valve member 102 is stuck projection 106 and engaging notch part 100 stops, the rotation driving by rotating shaft 86 thus, and valve member 102 is drive displacement vertically rotatably not.

Then, to electric motor 84 energising, rotating shaft 86 was further rotated for 1/4 week from power supply unit 88, and pin 90, is positioned on the upper end holding part 109 of cam path 108 in circumferential displacement along cam path 108.Thus, valve member 102 quilts are to axial below drive displacement.

Like this, the rotary driving force that electric motor 84 produces is transformed into axial linear drives power by cam mechanism, and is delivered on the valve member 102.And by making the rotating shaft 86 that drives electric motor 84 at the each half-twist of a circumferential direction, valve member 102 is action up and down vertically.

The actuator 82 of structure embeds in the nesting part 76 of accessory bracket 74 like this, is fixed with the state on the bottom wall portion that is positioned in nesting part 76.Under the state that is installed on this accessory bracket 74, support body 11 is assembled on the accessory bracket 74, constitutes the engine mounting 10 of present embodiment thus.

In engine mounting 10, actuator 82 is positioned at the below of support body 11, valve member 102 with the central abutting part 34 of barrier film 32 the state of axially-spaced predetermined distance or be positioned at the state of the butt that is piled up barrier film 32 central abutting part 34 below.

In other words, actuator 82 is positioned at a side opposite with partition member 42 across barrier film 32, and the valve member 102 of actuator 82 is the mutually opposed of central recess 48 across the central abutting part 34 of barrier film 32 and with the opening portion of balance cylinder's 66 sides of the second throttle orifice path 72.

And valve member 102 is by by in axial drive displacement and with central abutting part 34 butts of barrier film 32 or separate the axial round action upper and lower displacement accordingly of central abutting part 34 and valve member 102.Thus, the central abutting part 34 of barrier film 32 is relatively approaching or separate with the central recess 48 of partition member 42 by valve member 102.

That is, when valve member 102 is positioned at the lower end in round direction of action, valve member 102 below separate with the central abutting part 34 of barrier film 32, central abutting part 34 is positioned at the position that the below with partition member 42 separates, central recess 48 is 66 openings in the balance cylinder.

On the other hand, when valve member 102 was positioned at the upper end in round direction of action, central abutting part 34 was pushed by valve member 102, is pressed in the lower surface of partition member 42, and the opening portion of central recess 48 is sealed by valve member 102 by means of central abutting part 34 thus.

As mentioned above, round action by control valve member 102, the opening portion that can be central recess 48 with the opening portion of balance cylinder's 66 sides of the second throttle orifice path 72 switches to connected state and closed state, switches the connected state and the dissengaged positions of the second throttle orifice path 72.In addition, from Fig. 2 also as can be known, in the present embodiment, valve member 102 and barrier film 32 are separated from each other with non-bonding way.

First of the formation support body 11 of the engine for automobile of structure supporting 10 accessory 12 is installed like this, is installed on the not shown power unit by construction bolt 18.And second installs accessory 14 is installed on the not shown vehicle body by means of accessory bracket 74.Thus, engine mounting 10 is between power unit and vehicle body, and power unit is supported by the vehicle body vibrationproof.

The engine for automobile supporting 10 of above-mentioned such structure is installed on the automobile, and when being transfused to the vibration of the low frequency regions such as engine luggine that become problem in motion, compression chamber 64 just produces bigger pressure oscillation.And, utilize between compression chamber 64 and the balance cylinder 66 difference of the relative pressure oscillation that produces to guarantee amount of flow effectively by the fluid of first segment discharge orifice path 70, based on the mobilizations such as resonance effect of this fluid, effective vibration-isolating effect (high attenuating) is brought into play in the vibration of low frequency regions such as engine luggine.

At this moment, as shown in Figure 1, valve member 102 is positioned at the upper end that comes and goes direction of action, is pressed against the balance cylinder 66 side opening portions of the second throttle orifice path 72 across the central abutting part 34 of barrier film 32.Thus, the opening portion of balance cylinder's 86 sides of the second throttle orifice path 72 is not closed to leak fluid, and the second throttle orifice path 72 becomes dissengaged positions.Therefore, hydraulic pressure by preventing fluid from flowing between compression chamber 64 and balance cylinder 66 by the second throttle orifice path 72 in the compression chamber 64 escapes in the balance cylinder 66, thereby take place effectively to flow, can obtain vibration-isolating effect effectively based on the mobilization of fluid by the fluid of first segment discharge orifice path 70.

Become the idling vibration of problem and become the intermediate frequency such as cavity resonance at a slow speed of problem or the vibration of high-frequency region in motion when stopping by input, compression chamber 64 causes the pressure oscillation of little amplitude.When importing this vibration, by the energising of control to electric motor 84, rotating shaft 86 is rotated action, and as shown in Figure 2, valve member 102 is driven and is displaced to lower axial end.

Thus, the opening portion of balance cylinder's 66 sides of the second throttle orifice path 72 switches to connected state, and compression chamber 64 and balance cylinder 66 are communicated with to get up by the second throttle orifice path 72 each other.And, utilize between compression chamber 64 and the balance cylinder 66 the poor of the relative pressure oscillation that produces, the amount of flow of the fluid by the second throttle orifice path 72 is effectively guaranteed, based on the mobilizations such as resonance effect of this fluid, vibration waits the vibration of intermediate frequency or high-frequency region to bring into play effective vibration-isolating effect (the low spring effect of moving) during to idle running.

In a word, in the fluid-filled vibration damping device of present embodiment, by the round action of valve member 102, the second throttle orifice path 72 is controlled so as to connected sum and cuts off, and switches the vibrationproof characteristic.In addition, in Fig. 1, Fig. 2,, represented the stroke of the round action of valve member 102 turgidly for understandable.The shape of meanwhile also having represented cam path 108 turgidly specifically, for example, has also been represented the axial level difference of upper end holding part 109 and lower end holding part 110, the angle of inclination of the inclined lead part 111 that accompanies therewith etc. turgidly.

At this, in the engine for automobile supporting 10 of present embodiment, be provided with the control gear 92 of control "on" position, and the linking portion in valve member 102 and rotating shaft 86 adopts the cam mechanism that the rotary driving force of rotating shaft 86 is transformed into the axial driving force of valve member 102, and valve member 102 rotates the general motor 84 of driving towards axial both sides drive displacement by making rotating shaft 86 in a circumferential direction thus.Therefore, adopt the electric motor 84 of fairly simple structure, can realize the switching controls of vibrationproof characteristic with valve member 102 in axial both sides drive displacement up and down.

Be positioned at pin 90 under the situation of cam path 108 top and bottom, pin 90 is maintained at axially by the width direction wall butt to cam path 108.Thus, valve member 102 is positioned at pin 90 under the situation of top and bottom of cam path 108, and in other words, valve member 102 is positioned under the state of top and bottom in round direction of action, be maintained at state of rest by rotating shaft 86, and be retained axially can not drive displacement.Utilize the maintenance effect of the engaging of such pin 90 and cam path 108, not to electric motor 84 energisings the time, but the axial position of maintaining valve member 102 can stably be kept the vibrationproof characteristic.

Particularly in the present embodiment, the top and bottom of cam path 108 face be formed with the holding part 109,110 of axis normal direction expansion.Thus, pin 90 is positioned on the holding part 109 upper and lower end holding parts 110 of upper end, can more effectively bring into play the maintenance effect of the engaging of pin 90 and cam path 108, realizes that more reliably valve member 102 is in the maintenance that comes and goes the direction of action upper and lower end.Therefore, more the displacement of stable maintenance by valve member 102 moves the vibrationproof characteristic of being switched.

And, owing to can not needing to bring confining force for valve member 102 to electric motor 84 energisings, thereby can suppress to keep the electric power that is consumed when the vibrationproof characteristic that is switched, and the heating that suppresses to keep "on" position continuously and produced, the reduction of the durability that can prevent generates heat is produced.

Particularly when valve member 102 is positioned at the upper end that comes and goes direction of action, for can obtain the structure of effective confining force easily with step mode not, therefore can keep the substantial dissengaged positions of the second throttle orifice path 72 reliably, when being equivalent to low-frequency vibrations such as engine luggine in input, can realize target vibrationproof performance.

And, give in snap action that form to utilize pin 80 and cam path 108 in the engine mounting 10 of the structure that valve member 102 brings confining force, with keep the situation of the dissengaged positions of the second throttle orifice path 72 and compare by keeping continuous "on" position, when valve member 102 is subjected to pressure in the compression chamber 64 by the second throttle orifice path 72, valve member 102 also can overcome this pressure and stably keep the target switching state, can realize the substantial dissengaged positions of the second throttle orifice path 72 more reliably.

In the present embodiment, the camming surface that constitutes cam mechanism is realized by cam path 108.Therefore, utilize the rotation of rotating shaft 86 to drive, pin 90 is circumferentially moving along cam path 108, and by the width direction two side walls butt of pin 90 with cam path 108, valve member 102 not only is subjected to axially power up, also is subjected to axially power down.Therefore, can more effectively realize valve member 102 drive displacement of both sides up and down.

And, be inserted into the structure in the cam path 108 of groove shape for pin 90, therefore the butt of the wall by pin 90 and cam path 108 can prevent valve member 102 with respect to rotating shaft 86 relative tilts, can prevent that maybe valve member 102 from deviating to axial top from rotating shaft 86.Therefore, can realize the stable action of actuator 82, but highi degree of accuracy and stably carry out the switching of vibrationproof characteristic.

For example, wait the situation of stroke of the driving direction of control valve member 102 to compare with adopting linear motor, the variation with to the corresponding drive displacement amount of fluctuation of the power supply voltage of electric motor 84 of valve member 102 can be suppressed to lessly, can realize the switching of vibrationproof characteristic more accurately.

In the present embodiment, be formed with in the upper end portion of valve member 102 and push lip part 104 to outer circumferential side expansion.Thus, can guarantee that the area of upper-end surface of valve member 102 is bigger, can suppress the pressure of the per unit area that the central abutting part 34 of barrier film 32 is subjected to.And, be the flexure plane of circular arc shaped by making the outer circumferential face of pushing lip part 104, in the time of can preventing that valve member 102 from bringing the pressing force of barrier film 32, the pressing force concentration of local works, and can improve the endurance quality of barrier film 32.

Then, Fig. 5,6 shows the engine for automobile supporting 112 as second mode of execution of the present invention.This engine mounting 112 has actuator 114.In addition, in the following description, in the drawings identical reference character is put at member or the position identical in fact with above-mentioned first mode of execution, omitted explanation.

In more detail, actuator 114 also has valve member 116, and the lower end surface of valve member 116 is made of camming surface 118.Camming surface 118 comprises the relative a pair of upper end holding part 120 of a direction radially, relative with a radially direction of the opposite direction quadrature of these upper end holding parts 120 and be positioned at lower end holding part 122 below axial than upper end holding part 120.These upper end holding parts 120 and lower end holding parts 122 all be with the plane of axis normal direction expansion, extend in circumferential length with regulation.

And, couple together each other by inclined lead part 124 in circumferential adjacent upper end holding part 120 and lower end holding part 122, be formed in the camming surface 118 of whole full Zhou Yanshen by these upper end holding parts 120, lower end holding part 122 and inclined lead part 124.In addition, in the present embodiment, upper end holding part 120, lower end holding part 122 and inclined lead part 124 do not have the smooth connection of broken line ground in the attachment portion, and inclined lead part 124 is with respect to tilting with the axis normal direction, and expansion slightly agley.

In a word, the valve member 116 of present embodiment has the same shape of upper portion of upper end with the cam path 108 cut-out portion when having cut off the valve member 102 of above-mentioned first mode of execution.

The valve member 116 of Gou Zao present embodiment is installed in the rotating shaft 86 like this.That is, valve member 116 covers rotating shaft 86 from axial top, and the pin 90 that extends orthogonally with rotating shaft 86 is connected to camming surface 118 from the below.Thus, valve member 116 is by pin 90 supportings.

And, by to electric motor 84 energising, when making the each half-twist of rotating shaft 86, utilizing the effect of the cam mechanism that constitutes by camming surface 118 and pin 90, valve member 116 quilts are descended drive displacement in the axial direction.In addition, the valve member 116 of present embodiment similarly drives up and down with above-mentioned first mode of execution, omits detailed explanation at this.

The actuator 114 of such structure similarly is installed on the accessory bracket 74 with the actuator 82 of above-mentioned first mode of execution, and be provided in the below of support body 11, valve member 116 is piled up from the below with the central abutting part 34 of non-bonding way and barrier film 32.Be provided in the position of regulation in this wise by actuator 114, constitute the engine mounting 112 of present embodiment.In addition, in the present embodiment, similarly be positioned at least under the state of lower axial end at valve member 116 with above-mentioned first mode of execution, valve member 116 and central abutting part 34 are separately.Under such configuration status of actuator 114, the indirect butt by valve member 116 and partition member 42 can prevent that valve member 116 from deviating to axial top.

At this, in engine mounting 112 according to the structure of present embodiment, similarly utilize the driving up and down of valve member 116 with the engine mounting 10 of above-mentioned first mode of execution, the opening portion of balance cylinder's 66 sides of the open and close controlling second throttle orifice path 72, the vibrationproof characteristic is switched.Thus, under the situation of intermediate frequency that when input is equivalent to the low-frequency vibration of engine luggine and is equivalent to dally, vibrates or any of dither, also can bring into play effective vibration-isolating effect

In the engine mounting 112 of present embodiment, camming surface is made of the lower end surface of valve member 116, valve member 116 from the top bearing on the pin 90 that is fixed in the rotating shaft 86, the pin 50 with camming surface 118 butts, valve member 116 is assembled in the rotating shaft 86 thus.According to structure according to such present embodiment, can easily valve member 116 be installed in the rotating shaft 86, can realize boosting productivity.

More than, some embodiments of the present invention are illustrated, but these just illustrate, according to the concrete record of this mode of execution, the present invention can not be carried out any limited explanation.

For example, in above-mentioned first, second mode of execution, the support member 94 of valve member 102,116 stops with respect to the fastening that the second relative rotation that accessory 14 is installed is stuck projection 106 and engaging notch part 100, but such rotation limting mechanism is not the necessary formation of the present invention.Specifically, for example, have at movable valve body enough quality situation etc., make under such situation that movable valve body can not rotate by the friction between slip teat and the camming surface etc., also can omit the rotation limting mechanism.

And, in above-mentioned first, second mode of execution, the rotation limting mechanism is by being located at engaging protrusion 106 on the valve member 102,116, being located at the engaging notch part 100 that keeps in the tube portion 98 and constituting, for example, also can on movable valve body, be formed with the engaging notch part of opening at underpart and outer circumferential face, and, constitute the rotation limting mechanism by these fastenings that engage notch parts and engaging protrusion keeping tube portion side to form side-prominent engaging protrusion of inside week.The rotation limting mechanism of above-mentioned first, second mode of execution all is formed on the outer circumferential side of the valve stem of valve member 102,116, yet also can be with the interior all sides that keep being inserted in the tube portion into the valve stem of the valve member of hollow structure, form the fastening mechanism that constitutes by engaging protrusion and engaging notch part between the outer circumferential face of this maintenance tube portion and the inner peripheral surface of valve stem, form the rotation limting mechanism.In addition, in the time of will rotating limting mechanism be formed on the valve stem outer circumferential side of valve member 102,116 as above-mentioned first, second mode of execution, the valve stem of valve member 102,116 also can be solid construction.To keep inserting the valve stem of valve member 102,116 in the tube portion and will rotate limting mechanism and be formed in the valve stem all sides the time, maintenance tube portion also can be solid connecting rod shape.

In above-mentioned first, second mode of execution, cam path 108 and camming surface 118 are the structure of a pair of lower end holding part 110 that comprises diametrically opposed a pair of upper end holding part 109, make progress relative in the footpath with respect to the opposite direction quadrature of upper end holding part 109, rotating shaft 86 each half-twists of control electric motor 84, valve member 102,116 upper and lower displacements.But these cam paths 108 and camming surface 118 are examples of camming surface of the present invention, and the concrete shape of camming surface etc. should not explained by the structure of above-mentioned mode of execution record with limiting.

For example, also can with axis normal direction expansion and different separately radially relative two couples upper end holding part and the radially relative two pair lower end holding parts different with the opposite direction of these upper end holding parts circumferentially with uniformly-spaced and also upper end holding part and lower end holding part form circumferentially being adjacent to, and link adjacent upper end holding part and the lower end holding part constitutes camming surface by inclined lead part.And by 45 ° of the each rotations of the live axle that makes electric motor, movable valve body quilt is drive displacement up and down.In a word, the rotating amount of the rotating shaft of being controlled by control gear 92 86 does not limit especially, and the shape of camming surface suitably determines according to rotating amount of rotating shaft 86 etc.

And,, preferably shown in above-mentioned first, second mode of execution, form holding part like that, but holding part is not necessarily for the maintenance of the displacement state of realizing movable valve body effectively.Specifically, for example, as shown in Figure 7, in the unfolded drawing of the surrounding wall portion of valve member 126, cam path 128 is sinusoidal shape, also can be the top and bottom integrally bending that comprises cam path 128.In addition, cam path 128 also can not be the sinusoidal shape of one-period, also can be above sinusoidal shape of two cycles.

For example, as shown in Figure 8, in the unfolded drawing of the surrounding wall portion of valve member 130, also can adopt the cam path 132 that linearly extended a plurality of plane of inclination is connected continuously and form.At this moment, be connected with the plane of inclination in the top and bottom of cam path 132, as shown in Figure 8, interconnective plane of inclination is extended vertically and is clipped the both sides that straight line (double dot dash line among Fig. 8) by the apex portion of cam path 132 is arranged in circumferentially (Fig. 8, about).In addition, as mentioned above, the apex portion of cam path 132 (top and bottom) also can be formed with several.

Cam mechanism shown in above-mentioned first, second mode of execution just illustrates, and also can adopt other various known cam mechanisms (rotation motion being changed to straight-line mechanism by cam and follower).The concrete structure of following illustration cam mechanism.In addition, cam mechanism does not carry out limited explanation according to mode of execution and following illustrating.

Specifically, for example, also can adopt plane cam, the flat board that this plane cam is provided with on the live axle that is installed in electric motor and rotates around live axle, by make live axle and should the outer circumferential face of flat board between distance in circumferential variation, constitute camming surface by this dull and stereotyped outer circumferential face, by making the sliding contacting part that is located on the movable valve body with dull and stereotyped outer circumferential face butt and slide, make movable valve body with live axle roughly the direction of quadrature come and go action.

And, for example, also can adopt surface cam, this surface cam is provided with that angle of inclination with regulation is installed on the live axle of electric motor and the tilt flat plate that rotates by the rotary driving force that transmits electric motor, and make a face butt of the sliding contacting part that is located on the movable valve body and hang plate and slide, along with the rotation of the oblique flat board that tilts with respect to live axle, movable valve body is moved axially coming and going of live axle.

Camming surface also can not be located on the movable valve side.Specifically, for example, form the cam part of cylindrical shape and drum at the head portion of live axle, form the camming surface of given shape at the top end of cam part, or form cam path at the outer circumferential face of cam part, camming surface also can be located at drive shaft side thus.And when camming surface was located at drive shaft side, sliding contacting part was arranged on the movable valve side.Specifically, for example, be provided with and come and go pin that direction of action extends orthogonally etc. in round direction of action one end of movable valve body as sliding contacting part,, also can realize cam mechanism by making this sliding contacting part with camming surface that is formed on cam part or cam path butt and slide.And also can form the camming surface of given shape at the top end of live axle, and on the movable valve side and surface of contact live axle, form the camming surface that is embedded in the camming surface of live axle with specific angle of swing.As long as the entire contact surface by live axle and movable valve body forms camming surface and sliding contacting part like this, friction stress can be distributed to entire contact surface, can improve the durability of cam mechanism.

And, in above-mentioned first, second mode of execution, adopt rotating shaft 86 to rotate the motor of the structure that drives as electric motor 84 in a direction, and be provided with control gear 92 with formations such as mechanical contact control gear, by the energising of control gear 92 controls to electric motor 84, realize the round action of valve member 102,116, yet for example, also can adopt servomotor and stepper motor (being controlled so as to the electric motor that drives live axle with the angle of rotation rotation of stipulating one by one) etc. as electric motor.If adopt this servomotor etc., do not adopt mechanical contact control gear, just can control the rotating amount of electric motor, the activation point of movable valve body with the control gear pulse of outside, therefore can realize the miniaturization of control gear etc.

Particularly in the above-described 2nd embodiment, under the effect of the gravity that valve member 116 is subjected to, just can keep the butt state of camming surface 118 and pin 90, but also can come camming surface and sliding contacting part also can advantageously to realize the butt state of these camming surfaces and sliding contacting part by being provided with force application part on one's own initiative in the butt direction application of force.

Specifically, for example, compression helical spring is between between the opposing side of partition member 42 and central abutting part 34, utilize the reaction force of compression helical spring, promptly also can stably keep the butt state of camming surface 118 and pin 90 thus to valve member 116 application of forces in the below towards the direction of separating from partition member 42.For example, also can between electric motor 84 and valve member 116, set draft helical spring, utilize the elastic force of draft helical spring, to valve member 116 to the electric motor 84 side application of forces, camming surface 118 is pressed against on the pin 90 thus, stably keeps the butt state of these camming surfaces 118 and pin 90.

And as other object lessons that used such force application part, Fig. 9 shows the 3rd mode of execution of the present invention.The valve member 116 of present embodiment has the valve stem 133 of the valve head 131 and the drum of circular plate shape.Be with the compression helical spring 134 as force application part outside on the outer circumferential face of its valve stem 133, this helical spring 134 is provided between the axial opposing side of valve head 131 and engaging protrusion 106.In addition, helical spring 134 since resiliently deformable and can enlarged be enclosed within outward on the valve stem 133 so can cross engaging protrusion 106.The outside dimension of helical spring 134 is less than the internal diameter size of the maintenance tube portion 98 of support member 94, insert under the assembled state that keeps tube portion 98 in valve stem 133, helical spring 134 is provided in valve stem 133 and keeps radially between opposing side of tube portion 98 to be housed in the state that keeps in the tube portion 98

And, cover the spring retaining member 136 of the collar structure that is fixed with toroidal in the open-topped portion of the maintenance tube portion 98 of support member 94.This spring retaining member 136 is fixed in the tube portion 98 that keeps in its outer periphery portion with welding etc., and inside side protrudes flange shape circumferential portion towards the footpath at the open part that keeps tube portion 98 in it.In addition, the internal diameter size of spring retaining member 136 is a bit larger tham the outside dimension of the valve stem 133 of valve member 116, allows the axial displacement of valve member 116.

And, under the assembled state of valve member 116, helical spring 134 its axial ends (underpart among Fig. 9) and engaging protrusion 106 butts, and the other end be cap shape overcoat and be fixed on spring retaining member 136 butt ground maintenance on the outstanding tip portion that keeps tube portion 98.Thus, helical spring 134 is compressed between the engaging protrusion 106 of flange shape of remaining on spring retaining member 136 and valve member 116, and its result utilizes the elastic force of helical spring 134, valve member 116 quilts are to the electric motor 84 side application of forces, and the camming surface 118 of valve member 116 is pressed against on the pin 90.Thus, camming surface 118 and pin 90 more stably keep the butt state, also can improve the responsiveness of the on-off action of valve member 116 with respect to the Spin Control of electric motor 84.

In addition, in the present embodiment, spring retaining member 136 is assembled separately with respect to maintenance tube portion 98, compression keeps helical spring 134, but also can not use other such members, with the holding part and the maintenance tube portion 98 formation one of helical spring 134.

Engine mounting 10,112 shown in the above-mentioned mode of execution etc. is the object lesson of fluid-filled vibration damping device of the present invention, should not carry out determinate explanation to scope of the present invention according to the concrete structure of engine mounting shown in these mode of executions 10,112 etc.For example, the present invention is not only applicable to the fluid-filled vibration damping device of the illustrated so-called cup type of above-mentioned mode of execution, and be applicable to that the fluid-filled vibration damping device etc. of so-called cartridge type, the fluid-filled vibration damping device of this cartridge type have interior shaft component and outer barrel member links up each other by the main rubber elastomer and at the structure that is circumferentially with a plurality of fluid chamber that separate.

Then, Figure 10～12 show the engine for automobile supporting 210 as the 4th mode of execution of the present invention.This engine mounting 210 has actuator 282.In addition, in the following description, in the drawings identical reference character is put at member or the position identical with above-mentioned first～the 3rd mode of execution, omitted explanation.In more detail, actuator 282 has electric motor 284.

Electric motor 284 is existing motor, has the rotating shaft 286 as live axle.And by from being located at the energising of outside power supply unit 288, rotating force acts in the rotating shaft 286, and rotating shaft 286 is rotated driving around central axis.Particularly in the present embodiment, the sense of rotation of rotating shaft 286 changes according to the energising direction to electric motor 284.In addition, as electric motor 284, can adopt various known motors (motor) such as DC motor with separate excitation.

And, the outside thread member 290 as the screw section is installed in the rotating shaft 286 of electric motor 284.Outside thread member 290 is the members that are formed with the general cylindrical shape shape of worm tooth at outer circumferential face, and rotating shaft 286 is inserted on central axis with extending, fixes.And, along with the rotation of rotating shaft 286 drives, 290 rotations of outside thread member.

On circuit, be provided with control gear 292 with electric motor 284 and power supply unit 288 electrical connections.Control gear 292 for example comprise the travelling state that detects automobile etc. sensor (for example, known velocity transducer etc.) and, the mechanical contact control gear that the energising direction to electric motor 284 is changed according to the testing result of this sensor.Utilize this control gear 292, the sense of rotation of the rotating shaft 286 of electric motor 284 changes according to travelling state.Angle of rotation by detecting rotating shaft 286 and according to the energising of this testing result control, stop the rotation of rotating shaft 286 with the rotating amount of regulation to electric motor 284 to current"on"time of electric motor 284 etc.In addition, switch energising direction to electric motor 284, "on" position and the control gear 292 of "on" position can be by realizations such as various sensors such as known velocity transducer in the past and contact control gear are made up, in this description will be omitted.

Electric motor 284 is installed on the support member 294.Support member 294 has the thick toroidal of thickness, in the present embodiment, is formed by the synthetic resin of hard.And, be provided with towards the abutting part 296 of outer circumferential side expansion in the upper end portion of support member 294, and the outer periphery portion of abutting part 296 is outstanding upward.

And, be formed with the tube portion 298 that keeps in the inner circumference edge portion of support member 294.Keep tube portion 298 to be the general cylindrical shape shape, extend upward from the inner circumference edge portion of support member 294.Keep tube portion 298 its radially the relative part of a direction be formed with a pair of engaging notch part 300,300 of opening in interior all sides and upper-end surface.This engaging notch part 300 is length with regulation at axially extended groove shape, and circumferentially bi-side are expanded in parallel to each other in the present embodiment.

And electric motor 284 embeds, is fixed in the central hole of support member 294, makes the rotating shaft 286 of electric motor 284 extend on the center line of the central hole of support member 294.Thus, rotating shaft 286 is positioned at the position that separates with all sides that keep tube portion 298.

Cover the valve member 302 of the movable valve body of conduct at the head portion of rotating shaft 286.Valve member 302 has the inverted round-ended cylinder shape that roughly has, and in the present embodiment, owing to formed by metals such as iron and aluminum alloys, can realize improving durability.And, be formed with in the upper end portion of valve member 302 and push lip part 304 to the outer circumferential side expansion.The lip part 304 of pushing of present embodiment is chamfered to be outer periphery portion and is roughly semi-spherical shape in the longitudinal section.

And, be formed with in the underpart of valve member 302 from the relative part of a direction radially towards the side-prominent a pair of engaging protrusion 306,306 of periphery.Engaging protrusion 306 is roughly block projections, and circumferential both ends of the surface are parallel to each other.And, the circumferential width dimensions of engaging protrusion 306 be formed on the circumferential width dimensions that engages notch part 300 that keeps in the tube portion 298 about equally, and the axial dimension of engaging protrusion 306 is enough littler than the axial dimension that engages notch part 300.

At this, on valve member 302, be provided with internal thread part 308 as threaded joints.Internal thread part 308 utilizes and is the inverted surrounding wall portion formation that the valve member 302 of round-ended cylinder shape is roughly arranged, and side face is provided with worm tooth on whole total length within it.The worm tooth that constitutes internal thread part 308 for the corresponding structure of worm tooth of the outer circumferential face that is formed on the outside thread member 290 that is installed in the rotating shaft 286.

And the valve member 302 with such internal thread part 308 is installed in the rotating shaft 286 of electric motor 284.That is, valve member 302 covers rotating shaft 286 from the top, the surrounding wall portion of valve member 302 be positioned at the outer circumferential side of rotating shaft 286 dividually round the position of rotating shaft 286.In addition, in the present embodiment, the rotating shaft 286 of electric motor 284 is arranged in the round direction of action of aftermentioned valve member 302 and extends.

And, being installed in interior all sides that outside thread member 290 in the rotating shaft 286 inserts the surrounding wall portion of valve members 302, the worm tooth that is formed on the outer circumferential face of outside thread member 290 engages with the worm tooth of the internal thread part 308 of the inner peripheral surface that is formed on valve member 302.In other words, be installed in outside thread member 290 in the rotating shaft 286 is threaded into valve member 302 from lower opening internal thread part 308.Thus, valve member 302 is assembled in the rotating shaft 286, and is provided with the thread structure that is made of outside thread member 290 and internal thread part 308 at the linking portion of these rotating shafts 286 and valve member 302.

Rotating shaft 286 by electric motor 284 is positioned at all sides that keep tube portion 298, and valve member 302 inserts and keeps in the tube portion 298.At this, as shown in figure 12, the engaging protrusion 306 integrally formed in the underpart of valve member 302 aimed at circumferential position with the notch part 300 that engages that is formed on maintenance tube portion 298, and each engaging protrusion 306 embeds and respectively engages in the notch part 300.And, utilizing engaging protrusion 306 and the circumferential snap action that engages notch part 300, valve member 302 can not be with respect to keeping 298 rotations of tube portion circumferentially being held a portion 298 fastenings.By the fastening of such valve member 302 and maintenance tube portion 298, constitute the rotation limting mechanism of the valve member 302 of present embodiment.

At this, because energising produces rotary driving force at electric motor 284, the thread structure that constitutes by outside thread member 290 and internal thread part 308 is transformed into round driving force, is delivered on the valve member 302.And, by the sense of rotation of rotating shaft 286 of control electric motor 284, can be with valve member 302 in axial drive displacement to the position of regulation.Below the axial round action of valve member 302 is described.

At first, be installed in the underpart that outside thread member 290 in the rotating shaft 286 of electric motor 284 is positioned at the internal thread part 308 that is formed on valve member 302, that is, be positioned under the situation of lower ending opening portion of surrounding wall portion of valve member 302, valve member 302 is positioned at the upper end that comes and goes direction of action.In addition, be positioned under the state of the upper end of driving direction at such valve member 302, engaging protrusion 306 also is positioned at engaging notch part 300, can bring into play consequent snap action.

Then, from 288 pairs of electric motors of power supply unit 284 energising, when rotating shaft 286 rotated to a circumferential side, outside thread member 290 rotated relatively with respect to internal thread part 308, and outside thread member 290 is screwed into internal thread part 308.Thus, the valve member 302 that is formed with internal thread part 308 with respect to the rotating shaft 286 that outside thread member 290 is installed so that with respect to electric motor 284 in axially relative displacement downwards, move to the lower end that comes and goes direction of action.In addition, in the present embodiment, when valve member 302 is positioned at the direction of action end in the axial displacement driving, stop the energising to electric motor 284, valve member 302 keeps state of rest in the end of driving direction.

Particularly in the present embodiment, the fastening that the rotation of valve member 302 is stuck projection 306 and engaging notch part 300 stops, the rotary driving force that prevents rotating shaft 286 is thus transmitted by the friction between outside thread member 290 and the internal thread part 308 etc. makes valve member 302 rotations, can realize the axial drive displacement of valve member 302 effectively.

Then, by the control of control gear 292,, make rotating shaft 286 when circumferential counterrotating from 288 pairs of electric motors of power supply unit 284 energising, outside thread member 290 rotates relatively with respect to internal thread part 308, and outside thread member 290 rotates to the direction of deviating from respect to internal thread part 308.Thus, the valve member 302 that is formed with internal thread part 308 with respect to the rotating shaft 286 that outside thread member 290 is installed so that with respect to electric motor 284 above axially relative displacement is arrived, move to the upper end that comes and goes direction of action.In addition, in the present embodiment, by electric motor 284 oppositely being switched on rotating shaft 286 counter-rotatings.When valve member 302 moves to the upper end that comes and goes direction of action, stop to electric motor 284 energisings, valve member 302 remains on the upper end that comes and goes direction of action.

Like this, the thread structure of the linking portion of the rotary driving force that electric motor 284 produces by being located at rotating shaft 286 and valve member 302 is transformed into the driving force of axial straight line, is delivered on the valve member 302.And by the energising direction of switching controls to electronic horse 284, valve member 302 comes and goes action in the axial direction down.When valve member 302 is positioned at the end in round direction of action, stop to electric motor 284 energisings, the valve member 302 that comes and goes action is maintained at axial end portion.

The actuator 282 of structure embeds in the nesting part 276 of accessory bracket 274 like this, fixes with the state on the bottom wall portion that is positioned in nesting part 276.Under the state that is installed on this accessory bracket 274, support body 11 is assembled on the accessory bracket 74, constitutes the engine mounting 210 of present embodiment thus.

In engine mounting 210, actuator 282 is positioned at the below of support body 11, and valve member 302 at the axially-spaced predetermined distance, perhaps, is positioned at the below with the butt state that is piled up with respect to the central abutting part 34 of barrier film 32.

In other words, actuator 282 is positioned at a side opposite with partition member 42 across barrier film 32, and it is the relative position of central recess 48 that the valve member 302 of actuator 282 is positioned at the opening portion of balance cylinder's 66 sides of the second throttle orifice path 72 across the central abutting part 34 of barrier film 32.

And valve member 302 is in axial drive displacement, and with central abutting part 34 butts of barrier film 32 or separate, central abutting part 34 is according to the axial round action of valve member 302 and upper and lower displacement.Thus, the central abutting part 34 of barrier film 32 by valve member 302 with respect to the central recess 48 of separating structure material 42 relatively near or separately.

That is, when valve member 302 was positioned at the upper end that comes and goes direction of action, central abutting part 34 was pushed by valve member 302, is pulled to the lower surface of partition member 42, and the opening portion of central recess 48 is sealed by valve member 302 by means of central abutting part 34 thus.

On the other hand, when valve member 302 is positioned at the lower end in round direction of action, valve member 302 separates downwards with respect to the central abutting part 34 of barrier film 32, and central abutting part 34 is positioned at the position that the below with partition member 42 separates, and central recess 48 is 66 openings in the balance cylinder.

As mentioned above, round action by control valve member 302, the opening portion that can be central recess 48 with the opening portion of balance cylinder's 66 sides of the second throttle orifice path 72 switches to open state and closed state, and the second throttle orifice path 72 is switched into connected state and dissengaged positions.In addition, as shown in figure 11, in the present embodiment, valve member 302 and barrier film 32 are piled up with non-bonding way, can be separated from each other.

The formation support body 11 first installation accessories 12 of the engine for automobile of structure supporting 210 are installed on the not shown power unit by construction bolt 18 like this, and the second installation accessory 14 is installed on the not shown vehicle body by means of accessory bracket 74.Thus, engine mounting 210 is between power unit and vehicle body, and power unit is supported by the vehicle body vibrationproof.

The engine for automobile supporting 210 of as above such structure is installed on the automobile, when importing the vibration of the low frequency regions such as engine luggine that become problem in motion, produces bigger pressure oscillation at compression chamber 64.And, utilize between compression chamber 64 and the balance cylinder 86 the poor of the relative pressure oscillation that produces, guarantee effectively apart from the amount of flow of the fluid that passes through first segment discharge orifice path 70, based on the mobilizations such as resonance effect of this fluid, effective vibration-isolating effect (high attenuating) is brought into play in the vibration of low frequency regions such as engine luggine.

At this moment, as shown in figure 10, valve member 302 is positioned at the upper end that comes and goes direction of action, and the central abutting part 34 by barrier film 32 is by the balance cylinder 66 side opening portions that are pressed in the second throttle orifice path 72.Thus, the opening portion of balance cylinder's 66 sides of the second throttle orifice path 72 is by not leak fluid ground sealing, and the second throttle orifice path 72 is in dissengaged positions.Therefore, can prevent fluid from passing through the second throttle orifice path 72 and between compression chamber 64 and balance cylinder 66, flow, fluid pressure in the compression chamber 64 escapes into balance cylinder 66, the fluid that can produce efficiently by first segment discharge orifice path 70 flows, and can obtain the vibration-isolating effect based on the mobilization of fluid effectively.

Become the idling vibration of problem and become the intermediate frequency such as cavity resonance at a slow speed of problem or the vibration of high-frequency region in motion when stopping by input, compression chamber 64 causes the pressure oscillation of little amplitude.When importing this vibration, by the energising of control to electric motor 284, rotating shaft 286 is rotated action to a circumferential direction, and as shown in figure 11, valve member 302 quilts are to axial below drive displacement.

Thus, the opening portion of balance cylinder's 66 sides of the second throttle orifice path 72 switches to connected state, and compression chamber 64 and balance cylinder 66 are communicated with to get up by the second throttle orifice path 72 each other.And, utilize between compression chamber 84 and the balance cylinder 66 the poor of the relative pressure oscillation that produces, the amount of flow of the fluid by the second throttle orifice path 72 is effectively guaranteed, based on the mobilizations such as resonance effect of this fluid, vibration waits the vibration of intermediate frequency or high-frequency region to bring into play effective vibration-isolating effect (the low spring effect of moving) during to idle running.

In a word, in the fluid-filled vibration damping device of present embodiment, by the round action of valve member 302, the second throttle orifice path 72 is controlled so as to connected sum and cuts off, and switches the vibrationproof characteristic.In addition, in Figure 10, Figure 11,, represented the stroke of the round action of valve member 302 turgidly for understandable.The shape of meanwhile also having represented outside thread member 290 and internal thread part 308 turgidly specifically, for example, has also been represented the inclination of worm tooth of these screw sections 290,308 and size etc. turgidly.

At this, in the engine for automobile supporting 210 of present embodiment, be provided with the control gear 292 of control to electric motor 284 energisings, and the linking portion in valve member 302 and rotating shaft 286 adopts the thread structure that the rotary driving force of rotating shaft 286 is transformed into the axial driving force of valve member 302, and valve member 302 rotates general motor 284 quilts of driving towards axial both sides drive displacement by making rotating shaft 286 thus.Therefore, adopt the electric motor 284 of fairly simple structure, can make valve member 302 descend both sides to come and go displacement in the axial direction, can realize the switching controls of vibrationproof characteristic.

Not under the situation of electric motor 284 energisings, by the frictional force between screw member 290 and the internal thread part 308 and the engaging of worm tooth etc., valve member 302 remains at the not operating state that comes and goes the direction of action location.Utilize the engaging and the fricative maintenance effect of 290,308 of such screw sections, can be the time not to electric motor 284 energising the axial position of maintaining valve member 302, can stably keep the vibrationproof characteristic that is switched.

When particularly valve member 302 is positioned at the upper end that comes and goes direction of action, for obtain the structure of effective confining force easily with step mode not, can keep the substantial dissengaged positions of the second throttle orifice path 72 reliably, when importing low-frequency vibrations such as being equivalent to engine luggine, can realize target vibrationproof performance.

And, in the friction that utilizes 290,308 of screw sections and engaging and valve member 302 be subjected in the engine mounting 210 of structure of confining force, with keep the situation of the dissengaged positions of the second throttle orifice path 72 and compare by keeping continuous "on" position, when the pressure in the compression chamber 64 is delivered on the valve member 302 by the second throttle orifice path 72, valve member 302 is kept the target switching state with also overcoming this pressure stability, realizes the substantial dissengaged positions of the second throttle orifice path 72 more reliably.

And, do not need bring confining force just can for valve member 302 to electric motor 284 energisings, therefore the electric power that is consumed in the time of can suppressing to keep the vibrationproof characteristic that is switched, and the heating that suppresses to keep "on" position continuously and produced, can prevent that heat from causing the reduction of durability.

In the internal thread part 308 that forms by the central hole that outside thread member 290 screw threads that are fixed in the rotating shaft 286 is embedded utilize valve member 302, valve member 302 is installed in the rotating shaft 286, therefore can prevent the relative tilt of valve member 302 and rotating shaft 286 and axial disengagement etc.Therefore, can realize the stable action of valve member 302, highi degree of accuracy and stably carry out the vibrationproof characteristic.

For example, wait the situation of stroke of the driving direction of control valve member 302 to compare with adopting linear motor, the drive displacement amount of valve member 302 and the corresponding variation of fluctuation to the power supply voltage of electric motor 284 can be suppressed to lessly, can realize the switching of vibrationproof characteristic more accurately.

In the present embodiment, be formed with in the upper end portion of valve member 302 and push lip part 304 to outer circumferential side expansion.Thus, can guarantee that the area of upper-end surface of valve member 302 is bigger, can suppress the pressure of the per unit area that the central abutting part 34 of barrier film 32 is subjected to.And, be the flexure plane of circular arc shaped by the outer circumferential face of pushing lip part 304, in the time of can preventing that valve member 302 from bringing barrier film 32 pressing forces, the pressing force concentration of local works, and can improve the endurance quality of barrier film 32.

Then, Figure 13 shows the engine for automobile supporting 312 as the 5th mode of execution of the present invention.This engine mounting 312 has actuator 314.In addition, in the following description, in the drawings identical reference character is put at member or the position identical in fact with above-mentioned first mode of execution, omitted explanation.

In more detail, actuator 314 also has valve member 316.These valve member 316 integral body are the inverted round-ended cylinder shape that roughly has.The a part of internal diameter of the surrounding wall portion of valve member 316 on week diminishes, and by be formed with worm tooth on the inner peripheral surface of this small diameter portion, forms the gear part 318 as threaded joints.

On the other hand, in the rotating shaft 286 of electric motor 284, be fixed with outside thread member 290.The worm tooth of this outside thread member 290 is and the corresponding structure of worm tooth that is formed on the gear part 318 on the valve member 316.In addition, the outer monster of outside thread member 290 and the internal diameter of gear part 318 about equally, and less than the internal diameter of the part outside the gear part in the valve member 316 318.

The valve member 316 of Gou Zao present embodiment is installed in the rotating shaft 286 like this.That is, valve member 316 covers rotating shaft 286 from axial top, and the outside thread member 290 that is fixed in the rotating shaft 286 inserts in the central hole of valve member 316, and is threadedly connected on the gear part 318 that is formed on the valve member 316.Thus, the linking portion of rotating shaft 286 and valve member 316 is provided with the worm gear structure that is made of outside thread member 290 and gear part 318.

In addition, this so-called worm gear structure be comprise be installed in the rotating shaft 286 that rotary driving force is delivered to and outer circumferential face be formed with spiral helicine worm tooth worm gear (outside thread member 290) and with worm gear have at its perimeter butt and at the butt position in the structure of the threaded joints (gear part 318) of the worm tooth of worm gear engagement, utilize the rotation of worm gear, threaded joints is by linear drives.The concrete structure of such threaded joints does not limit especially, the valve member 316 of present embodiment also is its example, in addition, for example, also can be included in the plate portion of expanding with the axis normal direction by movable valve body, make this plate portion be connected to the central abutting part 34 of barrier film 32, and be provided with, the worm tooth of the worm tooth that is formed on this gear part and worm gear is meshed constitute the worm gear structure from the extended downwards tabular gear part of plate portion.

And,, make rotating shaft 286 rotations by to electric motor 284 energisings, the worm gear structure that utilization is made of being threaded of outside thread member 290 and gear part 318, valve member 316 is subjected to the driving force of straight line, and by the sense of rotation of control rotating shaft 286, valve member 316 comes and goes action in the axial direction down.And the valve member 316 of present embodiment is similarly driven up and down with the valve member 302 shown in above-mentioned first mode of execution, omits detailed explanation at this.

The actuator 314 of structure similarly is installed on the accessory bracket 274 with the actuator 282 of above-mentioned first mode of execution like this, and is provided in the below of support body 11, and valve member 316 is overlapped in the central abutting part 34 of barrier film 32 with non-bonding way from the below.Actuator 314 is provided in the position of regulation like this, constitutes the engine mounting 312 of present embodiment.In addition, in the present embodiment, similarly be positioned under the state of lower axial end at valve member 316 at least with above-mentioned first mode of execution, valve member 316 and central abutting part 34 are separately.Under the such configuration status of actuator 314, prevent that to the indirect butt of partition member 42 valve member 316 from deviating to axial top by valve member 316.

At this, engine mounting 312 and the engine mounting 210 of above-mentioned the 4th mode of execution of abideing by the structure of present embodiment similarly utilize the driving up and down of valve member 316, the opening portion of balance cylinder's 66 sides of the second throttle orifice path 72 is by open and close controlling, and the vibrationproof characteristic is switched.Thus, input be equivalent to engine luggine low frequency vibration and be equivalent to dally the intermediate frequency of time vibration or any situation of the vibration of high frequency is also brought into play effective vibration-isolating effect.

As mentioned above, also can be delivered to and be provided with the worm gear structure on the transfer route on the valve member 316 to replace thread structure at the rotary driving force of electric motor 284.The location of the valve member 316 when the round action of the valve member 316 when the situation that adopts such worm gear structure also all can realize energising with above-mentioned first mode of execution equally effectively and non-energising keeps.

Figure 14 shows the engine for automobile supporting 322 as the 6th mode of execution of the present invention.This engine mounting 322 has actuator 324.In addition, in the following description, in the drawings identical reference character is put at member or the position identical in fact with above-mentioned first mode of execution, omitted explanation.

In more detail, actuator 324 has valve member 326.Valve member 326 has the inverted round-ended cylinder shape that roughly has, and forms in the outer periphery portion of last bottom wall portion and to push lip part 304 towards the outer circumferential side expansion.Be formed with in the underpart of the surrounding wall portion of valve member 326 towards the outstanding engaging protrusion 306 of foreign side radially.In the present embodiment, 3 places on girth are formed with engaging protrusion 306, are separately positioned on the position outside the circumferential gear part described later 328.

On valve member 326, be formed with gear part 328 as threaded joints.Gear part 828 utilizes the part of the surrounding wall portion in the valve member 326 to form, and circumferentially is being formed with worm tooth at outer circumferential face on the length in whole regulation.In the present embodiment, worm tooth formation is on the whole entire axial length of the surrounding wall portion of valve member 326.

On the other hand, rotating shaft 286 merchants of electric motor 284 are equipped with outside thread member 290.Outside thread member 290 similarly is the general cylindrical shape shape that is formed with worm tooth at outer circumferential face with above-mentioned first mode of execution, and rotating shaft 286 is inserted into and is fixed in the center hole.In addition, the worm tooth that outside thread member 290 has is corresponding with the worm tooth on being formed on gear part 328, is meshing with each other.

The electric motor 284 that outside thread member 290 is installed in the rotating shaft 286 embeds in the support member 330.This support member 330 has the through hole of the circle of extending vertically in eccentric position, and has outstanding upward holding part 332 at core.Holding part 332 has the roughly sectional shape of certain C word, at axial straight-line extension.A plurality of positions on holding part 332 on girth are formed with the engaging notch part 300 of opening in inner peripheral surface and upper-end surface.This engaging notch part 300 is and the shape that is formed on the engaging protrusion 306 on the valve member 326 corresponding shape roughly, in the present embodiment, is formed with this engaging notch part 300 at 3 positions corresponding with the formation position of engaging protrusion 306.

And electric motor 284 embeds in the through hole of support member 330, and the rotating shaft 286 that outside thread member 290 is installed is outstanding upward.Valve member 36 embeds interior all sides of holding part 332, and each engaging protrusion 306 is inserted and respectively engaged in the notch part 300, by the rotation limting mechanism of these engaging protrusion 306 with the chimeric formation present embodiment of engaging notch part 300.

At this, be formed on the worm tooth and the worm tooth engagement that is formed on the outside thread member 290 of the gear part 328 on the valve member 326, therefore from the outside to electric motor 284 energisings and outside thread member 290 when being driven in rotation, the valve member 326 with gear part 328 is by drive displacement up and down.In addition, the valve member 326 of present embodiment is similarly driven up and down with the valve member 302,316 shown in above-mentioned first, second mode of execution, omits detailed explanation at this.

The actuator 324 of such structure similarly is installed on the accessory bracket 74 with the actuator 282 of above-mentioned first mode of execution, and be provided in the below of support body 11, valve member 326 is piled up with the central abutting part 34 of non-bonding way from below and barrier film 32.Be provided in the position of regulation by actuator 324 in this wise, constitute the engine mounting 322 of present embodiment.In addition, in the present embodiment, similarly be positioned under the state of lower axial end at valve member 326 at least with above-mentioned the 5th mode of execution, valve member 326 and central abutting part 34 are separately.Under such state that sets of actuator 324, the butt indirectly by valve member 326 and partition member 42 prevents that valve member 326 from deviating to axial top.

Like this Gou Zao engine mounting 322 also can with above-mentioned second mode of execution similarly by worm gear structure the straight driving force of rotary driving force conversion with electric motor 284, act on the valve member 326.Therefore, carry out the switching of the connected state and the dissengaged positions of the second throttle orifice path 72 by valve member 326, the vibration of the little amplitude of medium-high frequency of vibration can both obtain effective vibration-isolating effect to the vibration of the low frequency large amplitude that is equivalent to engine luggine and when being equivalent to dally.

The the 4th～the 6th mode of execution of the present invention more than has been described, these just illustrate, and according to the concrete record of this mode of execution, the present invention can not carry out any limited explanation.

For example, in above-mentioned the 4th～the 6th mode of execution, also can utilize the worm tooth that is formed directly on the movable valve body to constitute thread structure and worm gear structure, for example, be delivered to indirectly on the movable valve body with gear train by the deceleration that comprises rack-and-pinion etc. by the round driving force of thread structure and worm gear structure institute conversion.In a word, be provided with thread structure or worm gear structure from electric motor to the transfer route of movable valve body transmission of drive force, the confining force of the movable valve body when can not switched on gets final product.

In above-mentioned the 4th～the 6th mode of execution, show and optionally be provided with thread structure and worm gear is constructed any, also can adopt having thread structure and worm gear to the transfer route of movable valve body transmission of drive force and construct the two structure from electric motor

For example, in above-mentioned the 4th～the 6th mode of execution, valve member 302,316,326 is stuck the fastening prevention of projection 306 and engaging notch part 300 with respect to the support member 294 and the second relative rotation that accessory 14 is installed, but such rotation limting mechanism is not the formation of necessity of the present invention, specifically, for example, movable valve body can not rotate under such situation around the center line that comes and goes the direction of action extension, also can omit the rotation limting mechanism.

And, in above-mentioned the 4th～the 6th mode of execution, the rotation limting mechanism is by the engaging protrusion 306 that is located at valve member 302,316,326 sides and be located at and keep the engaging notch part 300 of tube portion 298 or holding part 332 sides to constitute, for example, also can form the engaging notch part of opening on the movable valve side at underpart and outer circumferential face, and keep tube portion and holding part side to form side-prominent engaging protrusion of inside week, constitute the rotation limting mechanism by these fastenings that engage notch parts and engaging protrusion.

Engine mounting the 210,312, the 322nd shown in above-mentioned the 4th～the 6th the mode of execution, the example of fluid-filled vibration damping device of the present invention, should not carry out determinate explanation to scope of the present invention according to the concrete structure of the engine mounting of these mode of executions.Promptly, the present invention is not only applicable to the fluid-filled vibration damping device of the illustrated so-called cup type of above-mentioned mode of execution, for example, and be applicable to that the fluid-filled vibration damping device etc. of so-called cartridge type, the fluid-filled vibration damping device of this cartridge type have interior shaft component and outer barrel member links up mutually by the main rubber elastomer and at the structure that is circumferentially with a plurality of fluid chamber that separate.

Then, show as the employed electric actuator 410 of the fluid-filled vibration damping device of the 7th mode of execution of the present invention at Figure 15,16.In more detail, electric actuator 410 has electric motor 412.In addition, in the following description, so-called above-below direction unless otherwise specified, the round direction of action that is meant movable link 428 described later is the above-below direction among Figure 15.

Electric motor 412 is existing motor, has the rotating shaft 414 as live axle.And by supplying with direct current from power supply unit 416, rotating force acts in the rotating shaft 414, and rotating shaft 414 is rotated driving around central axis.Particularly in the present embodiment, the sense of rotation of rotating shaft 414 changes according to the energising direction to electric motor 412.In addition, can adopt various known motors (motor) such as DC motor with separate excitation as electric motor 412.Power supply unit 416 can adopt with various DC electrical source, ac power supply and with Ac and be transformed into the power supply unit that galvanic rectifier is combined, and for example, can suitably utilize storage battery loaded onto vehicle (battery) etc.

Outside thread member 418 as the screw section is installed in the rotating shaft 414 of electric motor 412.Outside thread member 418 is members that worm tooth forms the general cylindrical shape shape on the side face outside, is inserted into to be fixed in the rotating shaft 414 on central axis with extending.And along with the rotation of rotating shaft 414 drives, outside thread member 418 is rotated.

Electric motor 412 is installed on the support member 420.Support member 420 has the thick toroidal of thickness, in the present embodiment, is formed by the synthetic resin of hard.

And, be formed with the tube portion 424 that keeps in the inner circumference edge portion of support member 420.Keep tube portion 424 to be the general cylindrical shape shape, extend upward from the inner circumference edge portion of support member 420.Keeping in the tube portion 424, its radially the relative part of a direction be formed with a pair of engaging notch part 426,426 of opening in inner peripheral surface and upper-end surface.This engaging notch part 426 be have roughly certain circumferential width size and with specific length at axially extended groove shape, in the present embodiment, circumferentially bi-side are expanded in parallel to each other.

And electric motor 412 embeds and is fixed on the central hole of support member 420, makes the rotating shaft 414 of electric motor 412 extend on the center line of the central hole of support member 420.Thus, rotating shaft 414 is positioned at the position that separates with all sides that keep tube portion 424.

The head portion of rotating shaft 414 covers the movable link 428 as output link.Movable link 428 has the inverted round-ended cylinder shape that roughly has, and in the present embodiment, by being formed by metals such as iron and aluminum alloys, can realize improving the durability with respect to distortion and wearing and tearing.And, be formed with in the upper end portion of movable link 428 and push lip part 430 to the outer circumferential side expansion.The lip part 430 of pushing of present embodiment is chamfered to be outer periphery portion and is roughly semi-spherical shape in the longitudinal section.

And, be formed with in the underpart of movable link 428 from the relative part of a direction radially to the side-prominent a pair of engaging protrusion 432,432 of periphery.Engaging protrusion 432 is roughly block projections, and circumferential both ends of the surface are parallel to each other.And, the circumferential width dimensions of engaging protrusion 432 be formed on the circumferential width dimensions that engages notch part 426 that keeps in the tube portion 424 about equally, and the axial dimension of engaging protrusion 432 is enough littler than the axial dimension that engages notch part 426.

On movable link 428, be provided with internal thread part 434 as threaded joints.Internal thread part 434 utilizes and is the inverted surrounding wall portion formation that the movable link 428 of round-ended cylinder shape is roughly arranged, and is formed with worm tooth on the whole total length of side face within it.The worm tooth that constitutes internal thread part 434 for the outer circumferential face that is formed on the outside thread member 418 that is installed in the rotating shaft 414 on the corresponding structure of worm tooth.

And the movable link 428 with such internal thread part 434 is installed in the rotating shaft 414 of electric motor 412.That is, movable link 428 is positioned to cover rotating shaft 414 from the top, and the outer circumferential side that is positioned at the surrounding wall portion of movable link 428 and rotating shaft 414 is dividually round the position of rotating shaft 414.In addition, in the present embodiment, the rotating shaft 414 of electric motor 412 is arranged to extend along the round direction of action of movable link 428 described later.

And, be installed in outside thread member 418 in the rotating shaft 414 and insert interior all sides of the surrounding wall portion of movable links 428, the worm tooth that is formed on the internal thread part 434 on worm tooth and the inner peripheral surface that is formed on movable link 428 on the outer circumferential face of outside thread member 418 engages.In other words, be installed in outside thread member 418 in the rotating shaft 414 screws in movable link 428 from lower opening internal thread part 434.Thus, movable link 428 is assembled in the rotating shaft 414, and is provided with the thread structure that is made of outside thread member 418 and internal thread part 434 at the linking portion of these rotating shafts 414 and movable link 428.

Rotating shaft 414 by electric motor 412 is positioned at all sides that keep watching portion 424, and movable link 428 inserts and keeps in the tube portion 424.At this, as shown in figure 17, the engaging protrusion 432 that is integrally formed in the underpart of movable link 428 is circumferentially keeping engaging notch part 426 position alignment in the tube portion 424 with being formed on, and each engaging protrusion 432 embedding respectively engages in the notch part 426.And, utilizing engaging protrusion 432 and the circumferential snap action that engages notch part 426, movable link 428 can not rotate relatively circumferentially being held a portion 424 fastenings.By the fastening of such movable link 428 and maintenance tube portion 424, constitute the rotation limting mechanism of the movable link 428 of present embodiment.

At this, the thread structure that the rotary driving force utilization that produces at electric motor 412 owing to power is made of outside thread member 418 and internal thread part 434 is transformed into round driving force, acts on the movable link 428.And, by the sense of rotation of rotating shaft 414 of control electric motor 412, can be with movable link 428 in axial drive displacement to the position of regulation.Axial round action to movable link 428 describes below.

At first, be installed in the underpart that outside thread member 418 in the rotating shaft 414 of electric motor 412 is positioned at the internal thread part 434 that is formed on the movable link 428, that is, be positioned under the situation of lower ending opening portion of surrounding wall portion of movable link 428, movable link 428 is positioned at the upper end that comes and goes direction of action.In addition, be positioned under the state of the upper end of driving direction at such movable link 428, engaging protrusion 432 also is positioned at engaging notch part 426, can bring into play consequent snap action.

Then, from 416 pairs of electric motors of power supply unit 412 energising, when rotating shaft 414 rotated to a circumferential side, outside thread member 418 rotated relatively with respect to internal thread part 434, and outside thread member 418 is screwed into internal thread part 434.Thus, the movable link 428 that is formed with internal thread part 434 with respect to the rotating shaft 414 that outside thread member 418 is installed so that with respect to electric motor 412 in axially relative displacement downwards, move to the lower end that comes and goes direction of action.

Particularly in the present embodiment, the fastening that the rotation of movable link 428 is stuck projection 432 and engaging notch part 426 stops, the rotary driving force that prevents rotating shaft 414 thus makes movable link 428 rotations by the transmission such as friction between outside thread member 418 and the internal thread part 434, can realize the axial drive displacement of movable link 428 efficiently.

Then, by from 416 pairs of electric motors of power supply unit 412 energising, rotating shaft 414 is when circumferential counterrotating, and outside thread member 418 rotate relatively with respect to internal thread part 434, and outside thread member 418 is to the direction rotation of deviating from respect to internal thread part 434.Thus, the movable link 428 that is formed with internal thread part 434 above axially relative displacement is arrived, moves to the upper end that comes and goes direction of action with respect to the rotating shaft 414 that outside thread member 418 is installed and then electric motor 412.In addition, in the present embodiment, by electric motor 412 being connected with the electric current of antipolarity, rotating shaft 414 counter-rotatings.

Like this, the thread structure of the linking portion of the rotary driving force that produces at electric motor 412 by being arranged on rotating shaft 414 and movable link 428 is transformed into axial linear drives power, is delivered on the movable link 428.And, by switching energising direction, making the sense of rotation difference of rotating shaft 414 to electric motor 412, movable link 428 comes and goes action in the axial direction down.From as can be known above, in the present embodiment, constitute power-supply change-over mechanism with the straight round driving force of rotary driving force conversion of electric motor 412 by being located at thread structure between rotating shaft 414 and the movable link 428.

At this, on the electric actuator 410 of present embodiment, be provided with the control circuit 436 of the round action of control movable link 428.This control circuit 436 is arranged on from power supply unit 416 on the energising circuit of electric motor 412 energisings, also has power supply unit 438.

Power supply unit 438 is with from the polarity device for switching of power supply unit 416 to the direct current power of electric motor 412 power supplies, in the present embodiment, based on the testing result of the sensor 440 that is connected, controls the energising direction to electric motor 412.In addition, the sensor 440 of present embodiment is based on the sensor that the rotating speed of the speed of a motor vehicle and motor etc. detects the travelling state of automobile, can adopt the velocity transducer of known structure in the past etc.

Power supply unit 438 is connected with electric motor 412 with second power supply line 444 by first power supply line 442.And, in first power supply line 442, be provided with first switch 446, and in second power supply line 444, be provided with second switch 448 as the second switch parts as first switch part.In addition, in the present embodiment, power supply unit 438 has the galvanic not shown terminal of output from power supply unit 416 inputs, one side's terminal is connected with a side's of electric motor 412 power supply terminal, and the lead branch that is connected with the opposing party's terminal and be connected to first switch 446 and second switch 448 constitutes first power supply line 442 and second power supply line 444 thus.

Be equipped with the 1st diode 450 in first power supply line 442 as the 1st rectification part.By the rectified action of the 1st diode 450, first power supply line 442 allows from the energising of the direction of first switch, 446 side direction power supply units, 438 sides, and is prevented from from the energising of the direction of power supply unit 438 side direction first switch 446 sides.Thus, in first power supply line 442, only make movable link 428 downwards the direct current of the polarity of drive displacement supply to electric motor 412.

And, in second power supply line 444, be equipped with the 2nd diode 452 as second rectification part.By the rectified action of the 2nd diode 452, second power supply line 444 allows from the energising of the direction of power supply unit 438 side direction second switches 448 sides, and is prevented from from the energising of second switch 448 side direction power supply units 438 side directions.Thus, in second electric line 444, the direct current of the polarity of the drive displacement that only movable link 428 made progress supplies to electric motor 412.

In addition, as the 1st, 2 diodes 450,452, can adopt with silicon, germanium, selenium etc. is that material forms the diode (for example, p-n connects diode) with known rectified action, adopts silicon diode the best.

Utilize the galvanic polarity of power supply unit 438 controls from power supply unit 416 inputs, and be provided with the 1st, the 2nd diode 450,452 on first, second supply electric line 442,444, the direct current of having controlled polarity thus optionally supplies to electric motor 412 by the either party of power supply line 442,444.From as can be known above, in the present embodiment, constitute the switching part of switching to the galvanic polarity of electric motor 412 power supplies by power supply unit 438 and the 1st, the 2nd diode 450,452.

And by having the switching part of power supply unit 438 and the 1st, the 2nd diode 450,452, switching controls supplies to the galvanic polarity of electric motor 412, switches the driving direction of movable link 428.

Be located at that first switch 446 in first power supply line 442 comprises first electrode 454 and as the first contact accessory 456 of first brush.First electrode 454 is formed by the metallic material of electric conductivity, is the long plate shape of thin thickness, is connected by the terminal of lead with power supply unit 438.In the present embodiment, first electrode 454 is adhesively fixed on the inner peripheral surface that keeps tube portion 424, is adapted to along the direction of action of movable link 428 promptly to extend axially.

The first contact accessory 456 is formed by the metallic material of electric conductivity, is the connecting rod shape, is installed on the movable link 428.The first contact accessory 456 circumferentially is being provided in and first electrode, 454 corresponding positions under the state of the maintenance tube portion 424 that embeds movable link 428.And when movable link 428 was positioned at regional from the intermediate portion of direction of action to the upper end, the head portion of the first contact accessory 456 contacted with first electrode 454.

On the other hand, second switch 448 comprises second electrode 458 and as the second contact accessory 460 of second brush.Second electrode 458 is formed by the metallic material of electric conductivity, is the long plate shape of thin thickness, is connected by the terminal of lead with power supply unit 438.In the present embodiment, second electrode 458 is adhesively fixed on the inner peripheral surface that keeps tube portion 424, is adapted to along the direction of action of movable link 428 promptly to extend axially.

The second contact accessory 460 is formed by the metallic material of electric conductivity, is the connecting rod shape, is installed on the movable link 428.The second contact accessory 460 is provided in and second electrode, 458 corresponding positions under the state of the maintenance tube portion 424 that embeds movable link 428.And when movable link 428 was positioned at regional from the intermediate portion of direction of action to the lower end, the head portion of the second contact accessory 460 contacted with second electrode 458.

Like this first contact accessory 456 and the second contact accessory 460 are installed on the movable link 428 by the accessory 462 that is adhesively fixed.The accessory 462 that is adhesively fixed is lamellar accessories, is formed by conductive material.And, the accessory 462 that is adhesively fixed is and the corresponding twisted plate shape of the outer circumferential face shape of movable link 428, the outer circumferential face of face and movable link 428 is overlapping and be adhesively fixed, and the base end part of the first contact accessory 456 and the second contact accessory 460 the circumferentially spaced predetermined distance of movable link 428 be fixed on the another side.Thus, the first contact accessory 456 and the second contact accessory 460 are disposing dividually with the axis normal direction, and be side-prominent to periphery from the surrounding wall portion of movable link 428.In addition, in the present embodiment, the first contact accessory 456 and the second contact accessory 460 extend gradually along with going to outstanding tip side with having a down dip.

And the accessory 462 that is adhesively fixed is connected with another power supply terminal of electric motor 412 by lead, and the another terminal of power supply unit 438 is connected with another power supply terminal of electric motor 412 with second switch 448 by first switch 446.

At this, the first contact accessory 456 and the second contact accessory 460 are installed on the movable link 428, and therefore according to the axial round action of movable link 428, first electrode 454 and second electrode 458 are in axial relative displacement.

And in the present embodiment, shown in Figure 18～20, first electrode 454 disposes axially relative with second electrode 458 with staggering, and the head portion of the first contact accessory 456 and the second contact accessory 460 axially is being positioned at identical height.More particularly, the upper end part of first electrode 454 is positioned at axial upside than the upper end part of second electrode 458, and is positioned at axial downside at the end portion of second electrode 458 than the end portion of first electrode 454.In addition, in the present embodiment, first electrode 454 and second electrode 458 supporting axle to equal in length, ratio second electrode 458 of first electrode 454 axially is being identical length to the extended part of upside with the extended part of ratio first electrode 454 of second electrode 458 downwards.

Thus, switch being connected and cut-out of first switch 446 and second switch 448 according to the drive displacement of movable link 428.

Promptly, at movable link 428 under the state of the intermediate portion drive displacement of direction of action, as shown in figure 18, keep the head portion and first electrode, 454 state of contact of the first contact accessory 456, and keep the head portion and second electrode, 458 state of contact of the second contact accessory 460.In other words, movable link 428 when the intermediate portion drive displacement of direction of action, first, second contact accessory 456,460 and 454,458 sliding contacts of first, second electrode.Thus, first switch 446 and second switch 448 all are in coupled condition, and first power supply line 442 and second power supply line, 444 the two quilts are kept coupled condition.

Be positioned at movable link 428 under the state of lower end of direction of action, as shown in figure 19, the head portion of the first contact accessory 456 is positioned at the position of throwing off from first electrode 464 downwards.The contact condition of these first electrodes 454 and the first contact accessory 456 is disengaged.And, extending to the below of first electrode 454 by second electrode 458, second electrode 458 and the second contact accessory 460 are maintained in coupled condition.Thus, first switch 446 becomes dissengaged positions, and the head portion of the second contact accessory 460 is in the state with the end portion butt of second electrode 458, and second switch 448 is maintained in coupled condition.Therefore, first power supply line 442 that has first switch 446 on the line is cut off, and second power supply line 444 that has second switch 448 on the line is maintained in coupled condition.

On the other hand, be positioned at movable link 428 under the state of upper end of direction of action, as shown in figure 20, the head portion of the second contact accessory 460 is positioned at the position of throwing off upward from first electrode 464, and the contact condition of these second electrodes 458 and the second contact accessory 460 is disengaged.And, extending to the below of second electrode 458 by first electrode 454, first electrode 454 and the first contact accessory 456 are maintained in coupled condition.Thus, second switch 448 becomes dissengaged positions, and the head portion of the first contact accessory 456 is in the state with the upper end part butt of first electrode 454, and first switch 446 is maintained in coupled condition.Therefore, second power supply line 444 that has second switch 448 on the line is cut off, and first power supply line 442 that has first switch 446 on the line is maintained in coupled condition.

Particularly in the present embodiment, axial the staggering of first electrode 454 and second electrode 458 set enough greatly, be positioned at movable link 428 under the state of lower end of direction of action, second electrode 458 extends to the below of the contact segment of second electrode 458 and the second contact accessory 460, and be positioned at movable link 428 under the state of upper end of direction of action, the contact segment of first electrode, 454 to the first electrodes 454 and the first contact accessory 456 extends to the top.Thus, utilize the error of the displacement amount of the movable link 428 that inertial force etc. causes, the two becomes dissengaged positions can to prevent first, second switch 446,448 effectively.

At this, movable link 428 be positioned at the intermediate portion of direction of action and first switch 446 and second switch 448 the two be under the state of coupled condition, by any of first power supply line 442 and second feeder circuit 444 to electric motor 412 power supplies.Promptly, be equipped with the 1st diode 450 in first power supply line 442, the direct current that only drives the polarity of movable link 428 downwards supplies power to electric motor 412 by first for some circuit 442, and be equipped with the 2nd diode 452 in second power supply line 444, the direct current that only drives the polarity of movable link 428 downwards supplies power to electric motor 412 by second for some circuit 444.

Drive movable link 428 downwards and when arriving the lower end of direction of action, the contact condition of first electrode 454 and the first contact accessory 456 is disengaged and cuts off first switch 446.Thus, stop to power to electric motor 412, stop movable link 428 drive displacement downwards by first power supply line 442.

On the other hand, be positioned under the state of the lower end of direction of action at such movable link 428, be maintained in state of contact at second electrode 458 and the second contact accessory 460, the direct current of the polarity that movable link 428 is driven upward is by second power supply line 444, to electric motor 412 power supplies.

And the direct current of the polarity that movable link 428 is driven upward by power supply unit 438 is by 412 power supplies of 444 pairs of electric motors of second power supply line, and movable link 428 is moved driving towards upper position thus.

And, by 412 power supplies of 444 pairs of electric motors of second power supply line, electric motor 428 is by towards the top drive displacement, and when movable link 428 arrived the upper end of direction of action, the contact condition of second electrode 458 and the second contact accessory 460 was disengaged and cuts off second switch 448.Thus, stop by 412 power supplies of 444 pairs of electric motors of second power supply line, movable link 428 displacement drive upward is stopped.

Upward during drive displacement, first electrode 454 that has separated contacts with the first contact accessory 456 movable link 428 once more from the lower end of direction of action, and first switch 446 is connected.And, being positioned at movable link 428 under the state of upper end of direction of action, first electrode 454 and the first contact accessory 456 are maintained in coupled condition.Therefore, be positioned at movable link 428 under the state of upper end of direction of action, first switch 446 is maintained in coupled condition, can be by 412 power supplies of 442 pairs of electric motors of first power supply line.

And the direct current of the polarity that movable link 428 is driven downwards by power supply unit 438 is by 412 power supplies of 442 pairs of electric motors of first power supply line, and movable link 428 is moved driving by orientation down thus.

So, the electric actuator 410 of present embodiment is thought the stroke realization of purpose by the round action of movable link 428.Particularly, first, second electrode 454,458 contacts by the drive displacement of movable link 428 with the physical property of first, second contact accessory 456,460 and is automatically removed, movable link 428 is stopped, therefore can realize reliably that movable link 428 stops at assigned position, can control the displacement amount of movable link 428 accurately.

And, in the present embodiment, being positioned at movable link 428 under the state of direction of action end, any one in first switch 446 and the second switch 448 is in dissengaged positions, and another is in coupled condition.Therefore, during by power supply unit 438 reversed polarities, the linking route of a side of the switch by having the coupled condition of being maintained in, direct current (d.c.) promptly supplies to electric motor 412, and movable link 428 is towards opposite tip side action.Therefore, can both stably realize the stopping and beginning to drive of movable link 428 of drive end from halted state.

First, second contact accessory 456,460 is fixed on the movable link 428, drive displacement along with movable link 428, make first, second contact accessory 456,460 with respect to first, second electrode 454,458 displacements relatively, switch the drive end that is connected and cuts off regulation movable link 428 of the switch 446,448 that constitutes by these electrodes 454,458 and contact accessory 456,460 thus.Therefore, wait the situation of the drive end of regulation movable link 428 to compare with the sensor that adopts the position of detecting movable link 428, simple structure, the part number is few, and can stipulate the drive end of movable link 428 at an easy rate.

Be provided with the counterrotating rotation limting mechanism that prevents movable link 428 and keep tube portion 424 in the present embodiment around central axis.Thus, can prevent that movable link 428 from rotating along with the rotation of the rotating shaft 414 of electric motor 412, makes movable link 428 drive displacement efficiently.

The electric actuator 410 of such structure for example is used to, as the engine for automobile supporting 464 of fluid-filled vibration damping device.In the following description, identical reference character is put at member or the position identical in fact with above-mentioned first～the 6th mode of execution, omitted explanation.

At this, the electric actuator 410 of abideing by structure of the present invention embeds in the nesting part 76 of accessory bracket 74, is fixed with the state on the bottom wall portion that is positioned in nesting part 76.Under the state that is installed on this accessory bracket 74, support body 11 is assembled on the accessory bracket 74, constitutes the engine mounting 464 of present embodiment.In addition, shown in Figure 21,22, the support member 420 that constitutes electric actuator 410 is and accessory bracket 74 corresponding shapes, and the inner face of the outer circumferential face of support member 420, lower surface and accessory bracket 74 is adhesively fixed overlappingly.

In engine mounting 464, electric actuator 410 is positioned at the below of support body 11, movable link 428 with the central abutting part 34 of barrier film 32 below axially-spaced predetermined distance or the butt state that is piled up are positioned at.

In other words, electric actuator 410 is positioned at a side opposite with partition member 42 across barrier film 32, and it is the relative position of central recess 48 that the movable link 428 of electric actuator 410 is positioned at the opening portion of balance cylinder's 66 sides of the second throttle orifice path 72 across the central abutting part 34 of barrier film 32.

And movable link 428 is by by in axial drive displacement, and with central abutting part 34 butts of barrier film 32 or separate, central abutting part 34 is according to the axial round action of movable link 428 and upper and lower displacement.Thus, the central abutting part 34 of barrier film 32 is according to the drive displacement of movable link 428, with respect to the central recess 48 of partition member 42 relatively near or separately.

That is, when movable link 428 was positioned at the upper end in round direction of action, central abutting part 34 was pushed by movable link 428, is pressed on the lower surface of partition member 42, and the opening portion of central recess 48 is sealed by movable link 428 by means of central abutting part 34.

On the other hand, when movable link 428 is positioned at the lower end in round direction of action, movable link 428 below separate with the central abutting part 34 of barrier film 32, central abutting part 34 is positioned at the position that the below with partition member 42 separates, central recess 48 openings are in the balance cylinder 66.

As mentioned above, round action by control movable link 428, the opening portion of the central recess 48 of the opening portion of balance cylinder's 66 sides of the second throttle orifice path 72 can be switched to connected state and closed state, switch the connected state and the dissengaged positions of the second throttle orifice path 72.In addition, as can be seen from Figure 22, in the present embodiment, movable link 428 and barrier film 32 are overlapped with non-bonding way, can be separated from each other.From above-mentioned explanation as can be known, in the present embodiment, be made of as the movable valve body that acts on member movable link 428, output link and effect member are made of same member.

First of the formation support body 11 of the engine for automobile of structure supporting 464 accessory 12 is installed like this, is installed on the not shown power unit by construction bolt 18.And second installs accessory 14 is installed on the not shown vehicle body by means of accessory bracket 74.Thus, engine mounting 464 is between power unit and vehicle body, and power unit is supported by the vehicle body vibrationproof.

The engine for automobile of above-mentioned structure supporting 464 is installed on the automobile, and when being transfused to the vibration of low frequency region of the engine luggine that becomes problem in motion etc., compression chamber 64 just produces bigger pressure oscillation.And, utilize between compression chamber 64 and the balance cylinder 66 difference of the relative pressure oscillation that produces to guarantee amount of flow effectively by the fluid of first segment discharge orifice path 70, based on the mobilizations such as resonance effect of this fluid, effective vibration-isolating effect (high attenuating) is brought into play in the vibration of low frequency regions such as engine luggine.

At this moment, as shown in figure 21, movable link 428 is positioned at the upper end that comes and goes direction of action, is pressed against the balance cylinder 66 side opening portions of the second throttle orifice path 72 across the central abutting part 34 of barrier film 32.Thus, the opening portion of balance cylinder's 86 sides of the second throttle orifice path 72 is not closed to leak fluid, and the second throttle orifice path 72 becomes dissengaged positions.Therefore, prevent fluid between compression chamber 64 and balance cylinder 66, flowing and hydraulic pressure in the compression chamber 64 escapes in the balance cylinder 66 by the second throttle orifice path 72, take place effectively to flow, can obtain vibration-isolating effect effectively based on the mobilization of fluid by the fluid of first segment discharge orifice path 70.

Become the idling vibration of problem and become the intermediate frequency such as cavity resonance at a slow speed of problem or the vibration of high-frequency region in motion when stopping by input, compression chamber 64 causes the pressure oscillation of little amplitude.When importing this vibration, by the power supply to electric motor 412, rotating shaft 414 is to a circumferential direction spinning movement, and as shown in figure 22, movable link 428 quilts are to axial below drive displacement.

Thus, the opening portion of balance cylinder's 66 sides of the second throttle orifice path 72 switches to connected state, and by the second throttle orifice path 72, compression chamber 64 and balance cylinder 66 are connected each other.And, utilize between compression chamber 84 and the balance cylinder 66 the poor of the relative pressure oscillation that produces, the amount of flow of the fluid by the second throttle orifice path 72 is effectively guaranteed, based on the mobilizations such as resonance effect of this fluid, vibration waits the vibration of intermediate frequency or high-frequency region to bring into play effective vibration-isolating effect (the low spring effect of moving) during to idle running.

In a word, in the fluid-filled vibration damping device of present embodiment, by the round action of movable link 428, the second throttle orifice path 72 is controlled so as to connected sum and cuts off, and the vibrationproof characteristic is switched.In addition, in Figure 21, Figure 22,, represented the stroke of the round action of movable link 428 turgidly for understandable.The shape of meanwhile also having represented outside thread member 418 and internal thread part 434 turgidly specifically, for example, has also been represented the inclination of worm tooth of these outside thread members 418 and internal thread part 434 and size etc. turgidly.

In the engine for automobile supporting 464 of such structure of abideing by present embodiment, electric actuator 410 by adopting above-mentioned structure is as the driver part of movable link 428, the open and close controlling of the second throttle orifice path 72 can be realized accurately, the stable switching controls of vibrationproof characteristic can be carried out.

And the control circuit 436 of the round action of control movable link 428 is simple structure, therefore also can prevent the increase of part number and the increase of cost etc.

And, come and go driving force and be delivered to power-supply change-over mechanism on the movable link 428 as being transformed into axial straight line by the rotary driving force that produces to electric motor 412 power substations, by adopting thread structure, utilize the effect of being threaded (engaging power and friction between worm tooth) of outside thread member 418 and internal thread part 434, movable link 428 is subjected to confining force.Therefore, the state that the movable link 428 that is stopped in the energising to electric motor 412 is positioned at drive end also can remain on drive end with movable link 428, can keep the switching state as the second throttle orifice path 72 of purpose.

When particularly movable link 428 is positioned at the upper end that comes and goes direction of action, for obtain the structure of effective confining force easily with step mode not, therefore can keep the substantial dissengaged positions of the second throttle orifice path 72 reliably, when being equivalent to low-frequency vibrations such as engine luggine in input, can realize target vibrationproof performance.

And, utilizing friction between outside thread member 418 and the internal thread part 434 and engaging and movable link 428 is subjected in the engine mounting 464 of confining force, with keep continuous "on" position and keep the situation of the dissengaged positions of the second throttle orifice path 72 and compare, pressure in the compression chamber 64 is delivered to situation on the movable link 428 by the second throttle orifice path 72, movable link 428 also overcomes this pressure and stably keeps the target switching state, realizes the substantial dissengaged positions of the second throttle orifice path 72 more reliably.

And, can not need to bring confining force for movable link 428 to electric motor 412 energisings, can suppress to keep the electric power that is consumed when the vibrationproof characteristic that is switched, and the heating that suppresses to keep "on" position continuously and produced, the reduction of the durability that can prevent generates heat is produced.

The internal thread part 434 that forms by the central hole that outside thread member 418 screw threads that are fixed in the rotating shaft 414 is embedded utilize movable link 428, therefore movable link 428 is installed in the rotating shaft 414, can prevent the opposing inclined of movable link 428 and rotating shaft 414 and axial deviates from etc.Therefore, can realize the stable action of movable link 428, highi degree of accuracy and stably carry out the vibrationproof characteristic.

For example, wait the situation of the stroke of the driving direction of controlling movable link 428 to compare with adopting linear motor, the drive displacement amount of movable link 428 and the corresponding variation of fluctuation to the power supply voltage of electric motor 412 can be suppressed to lessly, can realize the switching of vibrationproof characteristic more accurately.

In the present embodiment, be formed with in the upper end portion of movable link 428 and push lip part 430 to outer circumferential side expansion.Thus, can guarantee that the area of upper-end surface of movable link 428 is bigger, can suppress the pressure of the per unit area that the central abutting part 34 of barrier film 32 is subjected to.And, be the flexure plane of circular arc shaped by the outer circumferential face of pushing lip part 430, in the time of can preventing that movable link 428 from bringing the pressing force of barrier film 32, the pressing force concentration of local works, and can improve the endurance quality of barrier film 32.

More than, the 7th mode of execution of the present invention is illustrated, this just illustrates, and according to the concrete record of this mode of execution, the present invention can not be carried out any limited explanation.

For example, in the above-described embodiment, first, second electrode 454,458 is installed in and keeps in the tube portion 424, and first, second contact accessory 456,460 is installed on the movable link 428, along with the drive displacement of movable link 428, first, second contact accessory 456,460 is with respect to first, second electrode 454,458 relative displacements.But this is an example, for example, also can be installed on the outer circumferential face of movable link 428 by first, second electrode 454,458, and first, second contact accessory 456,460 is installed on the inner peripheral surface that keeps tube portion 424.

In the above-described embodiment, axially staggering mutually in end at first electrode 454 and second electrode 458, and the head portion of the first contact accessory 456 and the second contact accessory 460 is located at axially positions aligning mutually, for example, the axial end portion that also can be first electrode 454 and second electrode 458 is located at axially positions aligning mutually, the head portion of the first contact accessory 456 and the second contact accessory 460 is located at the position of axially staggering mutually, when movable link 428 is positioned at the end of direction of action, first, second switch 446, any of 448 becomes dissengaged positions, and another is maintained in coupled condition.

The either party of first, second electrode 454,458 and first, second contact accessory 456,460 must be installed on the movable link 428.For example, rotation according to rotating shaft 414 is rotated, comparing rotating member and output link as power transfer member that rotating speed is reduced with rotating shaft 414 by train of reduction gears etc. independently is provided with, outer circumferential face at this rotating member installs and fixes first, second brush, and is being equipped with first, second electrode that extends along the sense of rotation of rotating member with the corresponding position of the head portion of these first, second brushes.And, the first, the second brush is configured in circumferential identical position to the contact segment of electrode, and the sense of rotation that makes the end of first, second electrode the be located at rotating member position of staggering mutually.And rotating member rotates when a certain amount of, and either party that also can first, second switch part is in dissengaged positions, and the opposing party is maintained in coupled condition, and the displacement amount of output link is prescribed.

In addition, as seen from the above description, the relative displacement of first, second electrode and first, second brush may not be defined in the relative displacement of the driving direction of output link, for example, also can utilize the relative displacement of the straight line of the relative displacement that rotation produced around center line of the round action of output link, the direction different, switch the contact condition and the contactless state of electrode, brush with the round direction of action of output link.

In the above-described embodiment, the switching part that the galvanic polarity that is fed to electric motor 412 is switched comprises the 1st, the 2nd diode 450,452, switching part can comprise that also first, second diode 450,452, the first power supply lines 442 and second power supply line 444 supply to electric motor 412 with the direct current of mutual opposed polarity and get final product.Specifically, for example, according to the galvanic polarity that supplies to electric motor 412, the mechanical switch part of switching and first, second switch 446,448 that switch to dissengaged positions by the either party with first power supply line 442 and second power supply line 444 are provided with respectively, also can omit rectification parts such as diode.

In the above-described embodiment, an example as power-supply change-over mechanism, show and comprise outside thread member 418 that is installed in the rotating shaft 414 and the thread structure that is located at the internal thread part 434 of movable link 428, but power-supply change-over mechanism is not limited to such thread structure, for example, as power-supply change-over mechanism, also can adopt the worm gear structure.

More particularly, for example, in engine for automobile supporting 540 shown in Figure 23, on the outer circumferential face of the movable link 544 that constitutes electric actuator 542, by circumferentially being provided with worm tooth and formative gear portion 546 in whole specific length.In addition, in the following description,, omit explanation to identical reference character on the member identical in fact or the standard laid down by the ministries or commissions of the Central Government with above-mentioned mode of execution.

And the outside thread member 418 that is fixed in the rotating shaft 414 of electric motor 412 is threaded with gear part 546 on being located at movable link 544.Thus, comprise these outside thread members 418 and gear part 546 as the worm gear of power-supply change-over mechanism structure, during electric motor 412 energisings, the rotary driving force of rotating shaft 414 is delivered on the movable link 544 by the straight round driving force of worm gear tectonic transition.

Like this, construct by the worm gear that adopts the structure that outside thread member 418 is threaded with gear part 446 in the part of circumference, also can realize the rotary driving force of electric motor 412 is delivered to the power-supply change-over mechanism that output link is movable member 544 as linear drives power.

In the engine mounting 464 of above-mentioned mode of execution, movable valve body as the effect member of connected state that switches the second throttle orifice path 72 and dissengaged positions is made of the movable link 428 as output link that constitutes electric actuator 410, for example, also the connected state of switch fluids stream and the effect member and the output link of dissengaged positions independently can be provided with, this effect member is by bindings such as tooth bar etc. and output links, or it is directly fixing with output link, the round driving force that output link is subjected to is delivered on the effect member, thus, round driving along with output link, the effect member is come and gone to be driven, and can realize the switching controls of fluid passage effectively.

In addition, in electric actuator of the present invention, have straight line and come and go the output link that moves, for example, the connected sum of switch fluids stream cuts off, or the effect member that external force is acted on other members or position use not necessarily, installs after the effect member also can be provided with separately with output link.

Engine mounting 464 shown in the above-mentioned mode of execution is object lessons of fluid-filled vibration damping device of the present invention, according to the concrete structure of above-mentioned mode of execution record, the structure of fluid-filled type vibrationproof regulating device of the present invention can not be carried out determinate explanation.For example, the engine mounting 464 of above-mentioned mode of execution has the first segment discharge orifice path 70 and the second throttle orifice path 72, but the throttle orifice path also can be provided with more than three.For example, also can be provided with hydraulic pressure absorbing mechanism, this hydraulic pressure absorbing mechanism is formed by rubber elastomer, is provided with movable platen and movable film that compression chamber and balance cylinder are separated, by the micro displacement or the micro-strain of these movable platens and movable film, the fluid pressure of compression chamber is delivered to the balance cylinder.

Above-mentioned mode of execution show as to electric motor 412 power supply the power supply unit 416 of power supply part, electric actuator of the present invention also can set in advance the power supply part to power electric motors, preparing the power supply part different with electric actuator in addition, also can be the structure that electric actuator itself comprises power supply part.

The present invention may not only be applicable to the electric actuator that fluid-filled vibration damping device is used, also applicable to the electric actuator of the various uses of the round driving force that needs straight line.

The present invention may not only be applicable to engine mounting, for example, also goes for various fluid-filled type vibrationproof supportings, the employed various fluid-filled vibration damping devices of other purposes such as parts carry.

And the present invention may not only be applicable to the automobile fluid-filled vibration damping device, for example, also can suitably be applicable to the fluid-filled vibration damping device of train, the fluid-filled vibration damping device of the employed switch type of other various uses.

Other are not enumerated one by one, but the present invention is based on those skilled in the art's knowledge and can in the mode that has applied various changes, correction, improvement etc., be implemented, such mode of execution only otherwise break away from purport of the present invention is included in the scope of the present invention certainly.

Claims (23)

1. fluid-filled vibration damping device, wherein, first installation component and second installation component link up by the main rubber elastomer, and be formed with this main rubber elastomer and constitute the part of wall portion and enclose the compression chamber of incompressible fluid, constitute the part of wall portion and enclose the balance cylinder of incompressible fluid with flexible membrane, this compression chamber and balance cylinder are interconnected by fluid flowing path, this fluid-filled vibration damping device is characterised in that

Be provided with by coming and going the movable valve body that action switches to above-mentioned fluid flowing path connected state and dissengaged positions, adopt this movable valve body of electrical motor driven, and be provided with power-supply change-over mechanism from this electric motor to the transfer route of this movable valve body transmission of drive force, the rotary driving force of this electric motor is being delivered on this movable valve body as round driving force by this power-supply change-over mechanism.

2. fluid-filled vibration damping device according to claim 1 is characterized in that,

Above-mentioned electric motor produces the rotary driving force of a direction.

3. fluid-filled vibration damping device according to claim 1 and 2 is characterized in that,

Have the rotation limting mechanism on above-mentioned movable valve body, this rotation limting mechanism limits the rotation of above-mentioned movable valve body around its central axis by fastening, and this central axis extends along the round direction of action of above-mentioned movable valve body.

4. fluid-filled vibration damping device according to claim 1 is characterized in that,

Above-mentioned power-supply change-over mechanism is a cam mechanism.

5. fluid-filled vibration damping device according to claim 4 is characterized in that,

Above-mentioned cam mechanism comprises: be arranged on the camming surface on the either party in the live axle of the rotary driving force that is subjected to above-mentioned electric motor and the above-mentioned movable valve body, be arranged on that the opposing party in this live axle and the movable valve body goes up and with the sliding contacting part of this camming surface sliding contact, and this camming surface is formed by the cam path that the intermediate portion on the round direction of action of this movable valve body on the either party in this live axle of this electric motor and this movable valve body forms, and this sliding contacting part inserts in this cam path.

6. fluid-filled vibration damping device according to claim 5 is characterized in that,

Above-mentioned movable valve body has along coming and going the cylindrical portion that direction of action is extended, and this cylindrical portion is round the outer circumferential side configuration of above-mentioned live axle, axial intermediate portion in this cylindrical portion, be located at above-mentioned sliding contacting part on this live axle and be inserted in the above-mentioned cam path of inner peripheral surface upper shed of this cylindrical portion, constitute above-mentioned cam mechanism thus.

7. according to each described fluid-filled vibration damping device in the claim 4～6, it is characterized in that,

Above-mentioned cam mechanism comprises: be arranged on the camming surface on the either party in the live axle of the rotary driving force that is subjected to above-mentioned electric motor and the above-mentioned movable valve body, be arranged on that the opposing party in this live axle and the movable valve body goes up and with the sliding contacting part of this camming surface sliding contact, this camming surface is formed on either party's round direction of action one end face of this live axle and this movable valve body, and this sliding contacting part that is arranged on the opposing party of this live axle and this movable valve body is overlapping with butt state and this camming surface.

8. according to each described fluid-filled vibration damping device in the claim 4～6, it is characterized in that,

Above-mentioned cam mechanism comprises: be arranged on the camming surface on the either party in the live axle of the rotary driving force that is subjected to above-mentioned electric motor and the above-mentioned movable valve body, be arranged on the sliding contacting part on the opposing party in these live axles and the movable valve body, come and go at this movable valve body of this camming surface at least one end of direction of action and be formed with the holding part of vertically expanding with the round direction of action of this movable valve body.

9. according to each described fluid-filled vibration damping device in the claim 4～6, it is characterized in that,

Above-mentioned cam mechanism comprises: be arranged on the camming surface on the either party in the live axle of the rotary driving force that is subjected to above-mentioned electric motor and the above-mentioned movable valve body, be arranged on the sliding contacting part on the opposing party in this live axle and the movable valve body, and be provided with to this camming surface to the force application part of the direction application of force of this slip abutting part butt.

10. fluid-filled vibration damping device according to claim 9 is characterized in that,

Above-mentioned force application part is made of the helical spring on the outer circumferential face that is enclosed within above-mentioned movable valve body outward.

11. fluid-filled vibration damping device according to claim 9 is characterized in that,

On above-mentioned movable valve body, be provided with along the hollow of its round direction of action extension or solid valve stem, and being provided with respect to this valve stem is the guiding elements of interpolation state or overcoat state, is provided with the above-mentioned rotation limting mechanism of the above-mentioned movable valve body of restriction around the central axis rotation of this valve stem between this valve stem of this movable valve body and this guiding elements.

12. according to each described fluid-filled vibration damping device in the claim 4,6,10,11, it is characterized in that,

Above-mentioned compression chamber and above-mentioned balance cylinder are formed on the both sides across the partition member that is supported by above-mentioned second installation component, and above-mentioned fluid flowing path comprises the first segment discharge orifice path and the second throttle orifice path that is formed on this partition member, this second throttle orifice path is formed on this partition member and is adjusted to than first segment discharge orifice path high frequency, and this second throttle orifice path can switch to connected state and dissengaged positions by above-mentioned movable valve body.

13. fluid-filled vibration damping device according to claim 12 is characterized in that,

The opening portion of the above-mentioned balance cylinder side of the above-mentioned second throttle orifice path is formed on the middle body of above-mentioned partition member, the opening portion of this balance cylinder's side of this second throttle orifice path and above-mentioned movable valve body dispose across above-mentioned flexible membrane is relative, and this movable valve body is not bonding with this flexible membrane, rotary driving force by the above-mentioned electric motor of above-mentioned cam mechanism is passed on this movable valve body, this movable valve body comes and goes action, this movable valve body separately makes this second throttle orifice path become connected state from this flexible membrane thus, this movable valve body and this flexible membrane butt and this flexible membrane is pressed against on the opening portion of this balance cylinder's side of this second throttle orifice path make this second throttle orifice path become dissengaged positions.

14. fluid-filled vibration damping device according to claim 1 is characterized in that,

Above-mentioned power-supply change-over mechanism is made of at least one side of thread structure and worm gear structure, and the rotary driving force of this electric motor is delivered on this movable valve body as round driving force by at least one side in this thread structure and the worm and gear structure.

15. fluid-filled vibration damping device according to claim 14 is characterized in that,

Be provided with live axle with screw section by above-mentioned electrical motor driven rotation, and the threaded joints that is threaded with this screw section is formed on the above-mentioned movable valve body, comprises this screw section and threaded joints and constitutes at least one side of above-mentioned thread structure and above-mentioned worm gear structure.

16. according to claim 14 or 15 described fluid-filled vibration damping devices, it is characterized in that,

Above-mentioned compression chamber and above-mentioned balance cylinder are formed on the both sides across the partition member that is supported by above-mentioned second installation component, and above-mentioned fluid flowing path comprises the first segment discharge orifice path and the second throttle orifice path that is formed on this partition member, this second throttle orifice path is formed on this partition member and is adjusted to than first segment discharge orifice path high frequency, and this second throttle orifice path can switch to connected state and dissengaged positions by above-mentioned movable valve body.

17. fluid-filled vibration damping device according to claim 16 is characterized in that,

The opening portion of the above-mentioned balance cylinder side of the above-mentioned second throttle orifice path is formed on the middle body of above-mentioned partition member, the opening portion of this balance cylinder's side of this second throttle orifice path and above-mentioned movable valve body dispose across above-mentioned flexible membrane is relative, and this movable valve body is not bonding with this flexible membrane, by at least one side in above-mentioned thread structure and the worm and gear structure rotary driving force of above-mentioned electric motor is delivered on this movable valve body, this movable valve body comes and goes action, thereby make this movable valve body leave and make this second throttle orifice path become connected state from this flexible membrane, this movable valve body and this flexible membrane butt and this flexible membrane is pressed against on the opening portion of this balance cylinder's side of this second throttle orifice path make this second throttle orifice path become dissengaged positions.

18. an electric actuator, it has output link, and this output link will be transformed into linear drives power by the rotary driving force of the electric motor of dc powered by power-supply change-over mechanism and be come and gone by straight line and drive, it is characterized in that,

Be provided with the switching part that the galvanic polarity of the above-mentioned power electric motors of subtend is switched,, make the sense of rotation difference of this electric motor by the handover operation of this switching part, the driving direction of above-mentioned output link be switched toward direction and compound to,

Drive the powered by direct current of polarity of this output link to first power supply line of this electric motor will yearning for direction, be provided with first switch part, this first switch part has the displacement along with this output link, carry out first electrode and first brush of relative displacement with contact condition, this first brush is disengaged contact condition from this first electrode disengagement, this first power supply line is cut off, and stipulates the shift end of this output link yearning direction thus

Will to compound to the powered by direct current of the polarity that drives this output link to second power supply line of this electric motor, be provided with the second switch parts, these second switch parts have the displacement along with this output link, carry out second electrode and second brush of relative displacement with contact condition, this second brush is disengaged contact condition from this second electrode disengagement, this second power supply line is cut off, stipulate thus this output link to compound to shift end

And when this first switch part was in off-position, these second switch parts were kept coupled condition, and when these second switch parts were in off-position, this first switch part was kept coupled condition.

19. electric actuator according to claim 18 is characterized in that,

In above-mentioned first power supply line, be provided with first rectification part, in above-mentioned second power supply line, be provided with second rectification part, this first rectification part allows to yearn for direction and drives the direct current of polarity of above-mentioned output link to above-mentioned power electric motors, and stop to compound to the direct current of the polarity that drives this output link to this power electric motors, this second rectification part allows to compound to the direct current of the polarity that drives this output link to this power electric motors, and stop to yearn for the direct current of polarity that direction drives above-mentioned output link to this power electric motors, comprise these first rectification parts and second rectification part and constitute above-mentioned switching part.

20. according to claim 18 or 19 described electric actuators, it is characterized in that,

Above-mentioned powershift mechanism comprises power transfer member, be arranged on this power transfer member as above-mentioned first electrode of the side and above-mentioned second electrode with as the opposing party's above-mentioned first brush and the either party among above-mentioned these both sides of second brush, this first electrode and this second electrode are adapted to this power transfer member and extend with the corresponding direction of action of round action above-mentioned output link, and direction of action at this power transfer member, stagger mutually in the end of the end of this first electrode and this second electrode, and in the direction of action of this power transfer member, this first brush is arranged on identical position mutually with this second brush.

21. according to claim 18 or 19 described electric actuators, it is characterized in that,

Be arranged on the above-mentioned output link as above-mentioned first electrode of the side and above-mentioned second electrode with as the opposing party's above-mentioned first brush and the either party among above-mentioned these both sides of second brush, and this first electrode and this second electrode are arranged in the round direction of action straight-line extension of this output link, stagger on the round direction of action of this output link mutually in the end of these first electrodes and second electrode.

22. according to claim 18 or 19 described electric actuators, it is characterized in that,

Be provided with at least one side thread structure and the worm gear structure from above-mentioned electric motor to the transfer route of above-mentioned output link transmission of drive force, the rotary driving force of this electric motor is being comprised at least one side that this thread structure and this worm gear are constructed as coming and going the above-mentioned power-supply change-over mechanism that driving force is delivered on this output link.

23. fluid-filled vibration damping device, first installation component and second installation component of this fluid-filled vibration damping device link up by the main rubber elastomer, and be formed with this main rubber elastomer and constitute the part of wall portion and enclose the compression chamber of incompressible fluid, constitute the part of wall portion and enclose the balance cylinder of incompressible fluid with flexible membrane, these compression chambers and balance cylinder are interconnected by fluid flowing path, this fluid-filled vibration damping device is characterised in that

Utilize the round driving that constitutes the above-mentioned output link of each described electric actuator in the claim 18～22 to switch the connected state and the dissengaged positions of above-mentioned fluid flowing path.

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