CN1932329A - Fluid-filled type vibration damping device - Google Patents
Fluid-filled type vibration damping device Download PDFInfo
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- CN1932329A CN1932329A CN 200610153842 CN200610153842A CN1932329A CN 1932329 A CN1932329 A CN 1932329A CN 200610153842 CN200610153842 CN 200610153842 CN 200610153842 A CN200610153842 A CN 200610153842A CN 1932329 A CN1932329 A CN 1932329A
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- receiving chamber
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Abstract
A fluid filled type vibration damping device includes: a main rubber elastic body elastically connecting first and second mounting members; a partition member supported by the second mounting member; a pressure-receiving chamber partially defined by the elastic body and having a non-compressible fluid sealed therein; an equilibrium chamber partially defined by a flexible film and having the non-compressible fluid therein. The chambers are formed to either side of the partition member and an orifice passage permits a fluid communication between the two chambers. A short-circuit passage is formed so that the pressure-receiving and equilibrium chambers are able to be short-circuited through the short-circuit passage. A valve is used for switching the short-circuit passage, and a metal spring is used for holding the valve in a closed state at a predetermined initial level of elastic deformation.
Description
Incorporated by reference
The Japanese patent application No.2006-052971 that respectively comprises the Japanese patent application No.2005-267427 that submits on September 14th, 2005 of specification, accompanying drawing and summary and submit on February 28th, 2006 quotes in full at this as a reference.
Technical field
The present invention relates to a kind of fluid filled type vibration damping device, this device is designed to produce effectiveness in vibration suppression according to the mobilization of the incompressible fluid that seals in it, and more specifically, relate to a kind of fluid filled type vibration damping device that is suitable for use as automobile engine bracket, body support, differential mechanism support etc.
Background technique
In the field that is used to be installed in the vibration damping equipment between the parts that constitute the vibration transfer system, proposed to utilize based on the mobilization of the incompressible fluid of the sealing wherein effectiveness in vibration suppression of resonance effect for example.A kind of known this device is a fluid filled type vibration damping device, and this device comprises: be connected to one first assembling set in two parts to be connected in the vibration damping mode; Be connected to another second assembling set in two parts; Elasticity connects the primary elastomeric elastomer of spaced first assembling set and second assembling set; Its wall section ground is made of the primary elastomeric elastomer and can produces the pressure receiving chamber of pressure surge during the vibration input; The balance cylinder that its wall is made of fexible film and volume is easy to change; And orifice passage, pressure receiving chamber and balance cylinder are interconnected by this orifice passage.For example, the fluid filled type vibration damping device of this type can be used for automobile engine bracket effectively.
In this fluid filled type vibration damping device, when importing big vibrational loading by first assembling set and second assembling set, vibration damping equipment sends noise and vibration sometimes.Particularly, the fluid filled type vibration damping device of stating structure is in the use having under the situation of travelling on ditch road surface or the slow piece as the automobile of engine support, and this noise of generation and vibration can be felt by the passenger in the vehicle.
During the input impact shock, occur this noise and vibration in the time of can not picking up the pace when the fluid by the orifice passage between pressure receiving chamber and the balance cylinder flows, thereby in the pressure receiving chamber, can produce of short duration high-caliber negative pressure.Be associated therewith, gas separates with fill fluid to form bubble, and this is the phenomenon that is known as cavitation.Bubble occurs keeping spherical steady state usually to growth phase from beginning most, but can deform and form little blast jet (microjet) at burst duration.This produces surge pressure, and this pressure propagation passes to vehicle body etc. then to first assembling set and second assembling set.This can cause noise mentioned above and vibration problem.
For head it off, U.S. Patent No. 4697793 has for example proposed a kind of structure that wherein forms slit in the rubber partitioned film that is separated the part supporting, and this divider separates pressure receiving chamber and balance cylinder.By this rubber partitioned film, when the pressure difference between pressure receiving chamber and balance cylinder raise above predetermined value, the rubber partitioned film was owing to resiliently deformable takes place in pressure difference, and pressure receiving chamber and balance cylinder are communicated with thereby divider is opened.This setting can be eliminated the pressure difference between pressure receiving chamber and the balance cylinder.
But for the structures that propose in the U.S. Patent No. 4697793, when not only producing negative pressure in the pressure receiving chamber but also when producing malleation therein, the slit in the rubber partitioned film is all opened with authorized pressure receiving chamber and balance cylinder and is communicated with by this slit.Therefore, any pressure difference between pressure receiving chamber and the balance cylinder can be flowed by the fluid by this slit and eliminate, and this makes and is difficult to guarantee that enough relative pressure fluctuations are arranged between pressure receiving chamber and the balance cylinder.As a result, becoming is difficult to guarantee enough fluid amount of flow of passing through orifice passage, causes the danger that is difficult to fully obtain required effectiveness in vibration suppression on orifice passage.
In order to solve this new problem, the claimant proposes to use the control valve unit that is made of rubber elastomer in Japanese unexamined patent communique (JP-A-2003-148548).Be provided with by this, when producing the negative pressure that is higher than predetermined negative pressure in the pressure receiving chamber, orifice passage can pass through the short-channel short circuit.
The fluid filled vibration damping equipment that the other research that the inventor carries out illustrates in the JP-A-2003-148548 can not be satisfactory in all instances.Particularly, the control valve unit in the JP-A-2003-148548 is made of relatively thinner rubber elastomer.Owing to repeat to open and close or owing to change in time, the rubber elasticity cognition of formation control valve unit deforms or worsens, even cause the negative pressure in the pressure receiving chamber to be lower than the danger that still no longer can keep short-channel to open when being scheduled to negative pressure under the closed state of fluid-tight.In addition, owing to repeat resiliently deformable, rubber elastomer itself can break.In addition, according to desirable characteristics, the resiliently deformable of the control valve unit that is made of rubber elastomer can not enough accurately revert to original shape.In addition, by utilizing the control valve unit of rubber elastomer, size and dimension changes easily, and this makes that be difficult under highi degree of accuracy with predetermined negative pressure is that threshold value is come maintaining valve device open and close.
Summary of the invention
Therefore, a target of the present invention provides a kind of fluid filled type vibration damping device of novel structure, this device can be reliably and is accurately reduced the noise and the extent of vibration that produce during big vibrational loading in input, and enough fluid flow through orifice mouth passages are arranged during the vibration that still can guarantee simultaneously will to decay in input.
Above-mentioned and/or optional target of the present invention can be according at least one acquisition in the invention pattern hereinafter.Pattern hereinafter and/or the element that uses in each invention pattern can use with any possible optional combination.Should be understood that principle of the present invention is not limited to the combination of these patterns of the present invention and technical characteristics, but can recognize, perhaps can recognize according to the disclosure by those skilled in the art according to disclosed instruction of the present invention in whole specification and the accompanying drawing.
First pattern of the present invention provides a kind of fluid filled type vibration damping device, and this vibration damping equipment comprises: first assembling set; Second assembling set; Elasticity connects the primary elastomeric elastomer of first assembling set and second assembling set; Divider by the supporting of second assembling set; Its wall section ground is limited and is sealed with the pressure receiving chamber of incompressible fluid within it by the primary elastomeric elastomer; Its wall section ground is limited and is sealed with the balance cylinder of incompressible fluid within it by fexible film, described chamber is formed on the both sides of divider; Utilize divider to form and the permission orifice passage that fluid is communicated with between pressure receiving chamber and balance cylinder; Short-channel, this short-channel forms in divider, makes the pressure receiving chamber and the balance cylinder that are communicated with by orifice passage can pass through this short-channel by short circuit; Be used to valve that short-channel is switched between open mode and closed state; And the metal spring that is used for being in closed state with predetermined initial elasticity amount of deformation maintaining valve.
In the fluid filled type vibration damping device according to this schema construction, metal spring is as the pushing device that is in closed state with predetermined initial elasticity amount of deformation maintaining valve.Therefore, compare, can easily improve the size and dimension precision with the situation of wherein using rubber elastomer.By this setting, short-channel can be when producing negative pressure by cavitation or switches between open mode and closed state reliably and afterwards with having degree of precision, and simultaneously when not having cavitation (, when the force value in the pressure receiving chamber is higher than predetermined negative pressure value) can advantageously guarantee the damping behavior of expecting, and when cavitation occurring, can avoid noise and vibration.
By using metal spring, short-channel repeats to switch between open mode and closed state although metal spring repeats resiliently deformable, can easily not occur breaking or being out of shape, and can stably revert to its original shape.Therefore, can advantageously obtain extraordinary serviceability and operational reliability.
In addition, metal spring is decay not, and described decay can hinder the rapid operation of valve when using rubber elastomer.Therefore, can be implemented in the quick opening and closing of predetermined negative screw down valve.
Second pattern of the present invention provides a kind of fluid filled type vibration damping device according to first pattern, wherein valve and metal spring are made of the leaf spring of pressure receiving chamber one side that is arranged on divider, this leaf spring is stacked in and is pressed on the surface of divider with predetermined initial elasticity amount of deformation, thereby short-channel is covered by leaf spring to the opening of pressure receiving chamber.
In fluid filled type vibration damping device according to this schema construction, because leaf spring can form size and dimension and not have deviation, so can realize being pressed against the thrust magnitude of the valve on the opening that is positioned at pressure receiving chamber one side of short-channel accurately, and can realize the switching of short-channel between the connected sum closed condition accurately.
Three-mode of the present invention provides a kind of fluid filled type vibration damping device according to second pattern, and wherein the leaf spring outer periphery that are included in divider are fixed on this divider and the tongue piece that extends towards the center of this divider.
It is a kind of according to second or the fluid filled type vibration damping device of three-mode that four-mode of the present invention provides, and wherein leaf spring is by being supported between the outer periphery that are clipped in primary elastomeric elastomer and divider.
In the fluid filled type vibration damping device according to these schema constructions, leaf spring can utilize divider to be connected with main rubber body and support and do not need the supporting structure of special use.By this setting, can realize the less and easier advantage of assembling of parts.
It is a kind of according to second any one fluid filled type vibration damping device in the four-mode that the 5th pattern of the present invention provides, this device also comprises the leaf spring body of writing board shape, this leaf spring body has the U-shaped slit that passes its formation, so that the inside of this U-shaped slit is as leaf spring, and the outside of this U-shaped slit is with acting on the locating piece of locating the leaf spring body with respect to divider.
In fluid filled type vibration damping device according to this embodiment's structure, constitute leaf spring by a part of utilizing the leaf spring body, and be provided for locating piece with respect to divider location leaf spring body, can connect leaf spring and it stably is positioned on the precalculated position and does not rotate or move.Be provided with by this, can stably control the switching of short-channel between the connected sum closed state, and can obtain high reliability.In addition, by locating piece is provided, leaf spring can easily connect and be positioned at the precalculated position.Therefore, can realize extraordinary productivity by easier assembling.
A sixth aspect of the present invention provides a kind of fluid filled type vibration damping device according to the 5th pattern, wherein, on the surface that is positioned at pressure receiving chamber one side of divider, the leaf spring body extends on the whole length of divider along a direction perpendicular to axial direction, and the leaf spring body is sandwiched between divider and the primary elastomeric elastomer at its two end part.
In the fluid filled type vibration damping device according to this schema construction, the leaf spring body can not need special supporting structure by utilizing divider easily to be connected with main rubber body.Therefore, can obtain the advantage that parts are less and productivity improves.In this embodiment, especially, be clipped between divider and the primary elastomeric elastomer by two ends with the leaf spring body, can prevent advantageously that the leaf spring body from sliding along direction perpendicular to axial direction, thereby can advantageously keep initial coupled condition.
The 7th pattern of the present invention provides a kind of fluid filled type vibration damping device according to first pattern, and wherein said valve comprises the one-way valve that is installed in the short-channel, and metal spring comprises the disc spring that is used for promoting towards closing direction valve that is connected on the divider.
In the fluid filled type vibration damping device according to this schema construction, the disc spring that has the spring performance more stable than leaf spring by use can be realized the opening and closing operation of more accurate valve as metal spring, and the better durability of metal spring.
It is a kind of according to any one fluid filled type vibration damping device in first to the 7th pattern that the 8th pattern of the present invention provides, and wherein short-channel forms from the center along its length of orifice passage and puts towards a lateral deviation of the opening that feeds the balance cylinder.
In fluid filled type vibration damping device according to this schema construction, the opening of short-channel is formed in the more part near balance cylinder's one side opening of orifice passage, and this expression opening is located at a side of fluid inflow orifice passage when producing negative pressure in the pressure receiving chamber.Therefore, can more advantageously produce owing to short-channel is opened and passed through this short-channel and flow from the balance cylinder to the fluid of pressure receiving chamber.Therefore, the negative pressure that produces in the pressure receiving chamber can be eliminated quickly, and can more advantageously reduce or eliminate because noise or the vibration that cavitation causes.
It is a kind of according to any one fluid filled type vibration damping device in first to the 8th pattern that the 9th pattern of the present invention provides, and wherein is provided with sealing material at least one of the opening of the lip-deep short-channel that is arranged in pressure receiving chamber one side of divider and folded valve by thereon.
In the fluid filled type vibration damping device according to this schema construction, by insert sealing material between the opposing side of short-channel opening and valve, the size error of divider or valve or assembly error can sealed material absorption.Therefore, the opening of short-channel can be remained on the closed state of fluid-tight more by valve, and can not have under the situation of cavitation (especially the negative pressure in the pressure receiving chamber is lower than under the situation of predetermined negative pressure) advantageously to obtain the damping behavior of expection.
Can know from the explanation of preamble and to see, in fluid filled type vibration damping device constructed according to the invention, comprise leaf spring by design at the control valve unit that is used for making short-channel between the open and close state, to switch, this short-channel makes pressure receiving chamber and balance cylinder's short circuit, can when the big vibrational loading of input, eliminate the significant negative pressure that in the pressure receiving chamber, produces as far as possible fast and reliably, and prevent in the pressure receiving chamber owing to big vibration and noise appear in gas separation.
Description of drawings
From hereinafter with reference to can being more clearly visible aforementioned and/or other target of the present invention, feature and advantage the accompanying drawing detailed description of preferred embodiments, the similar elements of same numeral indication in the accompanying drawings, and in the accompanying drawings:
Fig. 1 is that form is the vertical sectional view of the liquid filled type vibration damping device of automobile engine bracket along the line 1-1 of Fig. 2, and this vibration damping equipment has the structure according to first embodiment of the invention;
Fig. 2 is the cross sectional view of the engine support of Fig. 1 along the line 2-2 of Fig. 1;
Fig. 3 is the zoomed-in view of cross section of principle part of the engine support of Fig. 1;
Fig. 4 has according to the automobile engine bracket of the structure of the second embodiment of the invention vertical sectional view along the line 4-4 of Fig. 5;
Fig. 5 is the cross sectional view of the engine support of Fig. 4 along the line 5-5 of Fig. 4; And
Fig. 6 has the vertical sectional view of the automobile engine bracket of structure in accordance with another embodiment of the present invention.
Embodiment
See figures.1.and.2, the form of illustrating is the liquid filled type vibration damping device of automobile engine bracket 10, and this vibration damping equipment has the structure according to first embodiment of the invention.This engine support 10 comprises first assembling set 12 that is made of metal and second assembling set 14 that is made of metal, and elasticity connects the primary elastomeric elastomer 16 of this first and second assembling set 12,14.By first assembling set 12 being connected to the power unit (not shown) of automobile and second assembling set 14 being connected to the vehicle body (not shown), can be in the vibration damping mode at vehicle body upper support power unit.In the explanation hereinafter, Vertical direction typically refers to the Vertical direction in Fig. 1.
To be elaborated below, first assembling set 12 has inverted, as to be roughly truncated cone shape, and has the threaded section that is integrally formed into 18 that projects upwards from its large-diameter end.Be provided with screw hole 20 in this threaded section 18, thereby first assembling set 12 is fixedly attached to the power unit (not shown) by the assembling bolt that is screwed in this screw hole 20.Stopping part 22 along the outside flange-shape of giving prominence to of diametric(al) is formed on the outer circumferential face in the large-diameter end of first assembling set 12.
Second assembling set 14 has thin-walled, major diameter, is roughly the shape of pipe.Opening in the upper axial end of this second assembling set 14 is provided with tapered cross-section 24, and in axial direction launch gradually towards the outside this tapered cross-section.On the inner edge of this tapered cross-section 24, be integrally formed into the flange portion 26 that outwards stretches along diametric(al).On the lower axial end face of second assembling set 14, be integrally formed into vertically extend downwards pound limit part 28.
First assembling set 12 and second assembling set 14 are placed on the roughly the same central axis, and first assembling set separates above second assembling set vertically, and primary elastomeric elastomer 16 is placed between the opposing side of first assembling set 12 and second assembling set 14.The shape of this primary elastomeric elastomer 16 is roughly conical butt, and wherein the diameter of the outer circumferential face of tapered cylinder shape upwards reduces vertically gradually.First assembling set 12 of the small-diameter end portions of the primary elastomeric of downward direction insertion vertically elastomer 16 is in place by sulfuration adhesion, thereby the minor diameter end face of primary elastomeric elastomer 16 is folded on the lower surface of the stopping part 22 that leans against first assembling set 12, and by sulfuration adhesion thereon.Second assembling set 14 is positioned to the inner peripheral surface of its tapered cross-section 24 and folds on the outer circumferential face of the large-diameter end that leans against primary elastomeric elastomer 16, and by sulfuration adhesion thereon.That is, in this embodiment, primary elastomeric elastomer 16 is configured to the molded parts of integrated vulcanizing on the inner peripheral surface of the outer circumferential face of first assembling set 12 and second assembling set 14 of sulfuration adhesion respectively.The yielding rubber 30 that is integrally formed into primary elastomeric elastomer 16 is fixed on the stopping part 22 of first assembling set 12, thereby projects upwards vertically.
In this integrated vulcanizing moulding part, the opening of the axial upside of second assembling set 14 forms fluid-tight by primary elastomeric elastomer 16, thereby formation is vertically to the inner recesses 32 of under shed.The thin rubber seal layer 34 that is integrally formed into primary elastomeric elastomer 16 by sulfuration adhesion on the inner peripheral surface of second assembling set 14, so that cover its whole substantially.In this embodiment, stepped part 36 is arranged on the axial intermediate portion of the rubber seal layer 34 on the inner peripheral surface that is fixed on second assembling set 14, the part that wherein is positioned at these stepped part 36 tops vertically is thicker, and it is thinner to be positioned at the part of these stepped part 36 belows vertically.
Be provided with barrier film 50 at the lower axial end opening of second assembling set 14 as fexible film.This barrier film 50 has the form of the thin rubber film of the dish type of being roughly, and can easily be out of shape thereby this barrier film is lax, and be roughly annular ring accessory 52 sulfuration adhesions on the circumferential edge of this barrier film.This ring accessory 52 inserts second assembling set 14 from lower ending opening, and is held in place in the mode of pounding the limit by being pounded limit part 28, so that barrier film 50 is fastened on second assembling set 14.Utilize this setting, the lower axial end opening of second assembling set 14 is covered by barrier film 50 fluid-tight ground, thereby form the fluid chamber 54 between the axial opposing side of the primary elastomeric elastomer 16 of two axial sides that cover second assembling set 14 respectively and barrier film 50, in this fluid chamber, be sealed with incompressible fluid.Incompressible fluid as being sealed in the fluid chamber 54 can make water, alkylene glycol, ployalkylene glycol, silicone oil or their mixture.For the resonance effect according to the fluid by orifice passage realizes effectiveness in vibration suppression effectively, preferably use viscosity to be 0.1Pas or lower low viscous flow body.
Roughly form and lead to its outer circumferential face around 3/4ths rectangular recess 62 that extend of the circumference of divider 56, the opening of this rectangular recess 62 by the sealing of second assembling set, 14 fluid-tight ground to form tunnel-shaped runner.The two ends of this tunnel-like runner connect pressure receiving chamber 58 and balance cylinder 60 respectively, thereby runner forms the orifice passage 64 that along the circumferential direction extends on the circumferential edge of divider 56, and pressure receiving chamber 58 and balance cylinder 60 are interconnected.By this setting, pressure receiving chamber 58 and balance cylinder 60 keep fluid to be communicated with by orifice passage 64 usually, and the fluid of filling can flow between pressure receiving chamber 58 and balance cylinder 60 by orifice passage 64.In this embodiment, by adjusting the length and the channel cross sectional area of orifice passage 64, response is corresponding to the input of the vibration in the low-frequency range of transmitter shake, and the resonance effect based on the fluid that is caused flowing through orifice passage 64 produces high-caliber decay behavior.
At the middle part along direction perpendicular to axial direction of divider 56, be integrally formed into the protuberance 65 that projects upwards vertically, and the external circumferential at this middle part partly is formed with the positioning salient 66 that projects upwards vertically.In this embodiment, divider 56 is formed by rigid resin, and protuberance 65 utilizes the formation such as running channel that form during molded.
The folded upper surfaces that lean against divider 56 of cover plate accessory 67 with elongated plate-shaped leaf spring body are on the surface on pressure receiving chamber 58 1 sides.In this embodiment, cover plate accessory 67 roughly passes folded leaning against on the upper surface of spacer member 56 on the whole length of a direction of its diameter on the edge of spacer member 56, and the end of two length directions of cover plate accessory is clipped between the upper surface of the step portion 36 of primary elastomeric elastomer 16 and divider 56 vertically, thereby this cover plate accessory is connected correct position securely.
Core at cover plate accessory 67 forms circular socket holes 68, and is pressed into this jack 68 from the outstanding protuberance 65 of the core of divider 56.The diameter of jack 68 is less than the diameter of protuberance 65, and this jack has a plurality of slits that extend radially outward from this jack, thereby when protuberance 65 when the axial direction of support is pressed into jack 68, shown in the dotted line in Fig. 3, the part that forms slit is inclined upwardly towards the center gradually.By this setting, prevent that advantageously protuberance 65 from separating with jack 68.
Place, end at the length direction of cover plate accessory 67 forms positioning hole 69, and the diameter of this positioning hole is less than jack 68.By inserting this positioning hole 69, can prevent that cover plate accessory 67 from rotating around jack 68 (protuberance 65) from divider 56 outstanding positioning salients 66.In this embodiment, this embodiment's locating piece comprises the positioning salient 66 that inserts positioning hole 69.Positioning hole 69 is positioned at hereinafter leaf spring 70 outsides with explanation along direction perpendicular to axial direction, and wherein included locating piece is positioned at the position with leaf spring 70 external discrete.
The part of cover plate accessory 67 has the rectangular slot that is generally U-shaped, and the part bending that wherein is positioned at U-shaped rectangular slot inside is with lifting in axial direction, thus the leaf spring 70 of formation present embodiment.This leaf spring 70 forms near the outer periphery of fluid chamber 54, and in this embodiment, forms particularly to be positioned at orifice passage 64 tops vertically.As shown in Figure 3, leaf spring 70 is arranged so that it along constituting the incline section 71 that extends obliquely perpendicular to the axial outside part that is positioned at of support, axially is positioned to make progress gradually along the axial and inside direction of support perpendicular to support with the edge.Leaf spring 70 also is arranged so that it along constituting cover plate part 72 perpendicular to the axial inner part that is positioned at of support, and this part tilts and axially is positioned to along the axial and inside direction of support downward gradually with the edge perpendicular to support.In this embodiment, valve and medal spring are integrally formed into by this leaf spring 70.Can understand from the preamble explanation, the leaf spring 70 in this embodiment constitutes tongue piece, and this tongue piece is being fixed to divider 56 along the outside perpendicular to axial direction, and extends internally along direction perpendicular to axial direction.
Comprise the sealing material that is roughly dish type and stick on the lower surface of cover plate part 72 that wherein the lower surface of rubber seal 74 is arranged to be abutted against divider 56 by the rubber seal 74 that elastomer forms.In addition, through hole 75 is formed in the cover plate part 72 passing the cover plate part along thickness direction, and retaining part 76 is integrally formed into rubber seal 74 by this through hole 75.Retaining part 76 forms from the upper surface of cover plate part 72 and projects upwards vertically, and has its diameter towards the diminishing shape that is roughly frustum of a cone of its outstanding far-end.Retaining part 76 is at the diameter of its outstanding far-end diameter less than through hole 75, and the diameter of its base portion is greater than the diameter of through hole 75.By this design, can retaining part 76 be pushed through hole 75 from the axial below of cover plate part 72, and in case retaining part 76 is pushed through hole 75, can prevent to pull out retaining part 76 backward by through hole 75, thereby prevent that the rubber seal 74 that is integrally formed into retaining part 76 from peeling off from cover plate part 72 from base portion side.
Can be clear that from Fig. 1, cover plate part 72 is pressed against on the divider 56 via rubber seal 74 under folded situation about leaning against on the divider 56, and thereby resiliently deformable cover plate parts 72 take place and become and be roughly parallel to the upper surface of divider 56 in leaf spring 70, thereby set up the predetermined initial elasticity amount of deformation of leaf spring 70.By cover plate accessory 67 (leaf spring 70) being connected to the upper surface of divider 56, cover plate part 72 is pressed against on the upper surface of divider 56 by the elastic force that is out of shape based on the initial elasticity of leaf spring 70.Utilize this elastic force, be pressed against on the upper surface of divider 56 to rubber seal 74 fluid-tight.
In divider 56, short circuit runner 77 forms short-channel.Short circuit runner 77 is circle hole shape passages, and an one opening leads to pressure receiving chamber 58 and another opening leads to the middle part of the length direction of orifice passage 64.Be provided with by this, the middle part of the length direction of pressure receiving chamber 58 and orifice passage 64 is communicated with by short circuit runner 77.In this embodiment, described short circuit runner forms the roof that is positioned near the rectangular recess 62 the opening of balance cylinder's 60 1 side opening mouth passages 64 along the axial penetration of support.The diameter of short circuit runner 77 is less than the diameter of rubber seal 74, and when rubber seal 74 is folded when leaning against on the divider 56, short circuit runner 77 and rubber seal 74 are positioned to roughly concentric.Thereby, under the initial elasticity amount of deformation of leaf spring 70, being pressed against by rubber seal 74 on the upper surface of divider 56, the opening of the short circuit runner 77 of pressure receiving chamber 58 1 sides is by the sealing of leaf spring 70 fluid-tight ground.
Therefore, by being installed in the engine support 10 in the automobile according to this embodiment, when along the direction of approximate vertical during by first assembling set 12 and second assembling set, 14 inputted vibrations, poor according to the relative pressure between consequent pressure receiving chamber 58 and the balance cylinder 60, fluid flows through the orifice passage 64 between two chambers 58,60.Particularly, in this embodiment, orifice passage 64 has tuned to for example low-frequency range of motor shake, and when input low frequency, big amplitude vibration, because rubber seal 74 is pressed against on the upper surface of divider 56 because of the elastic force of leaf spring 70, so short circuit runner 77 will be remained in the sealing state of fluid-tight by rubber seal 74.Therefore, can obtain effectively to flow, and can realize effectively resisting the effectiveness in vibration suppression of motor shake or other low frequency, big amplitude vibration according to the resonance effect of the fluid that flows by the fluid of orifice passage 64.
On the other hand, when engine support 10 stands big vibrational loading for example at vehicle roll or suddenly between deceleration period, in pressure receiving chamber 58, produce high negative pressure, cover plate part 72 since the negative pressure of pressure receiving chamber 58 be attracted and resiliently deformable take place with roughly along the upwards rising of axial direction of support.Therefore, being pressed against cover plate part 72 on the opening that is positioned at pressure receiving chamber 58 1 sides of short circuit runner 77 (being fixed on the rubber seal 74 on the lower surface of cover plate 72) removes from the opening that is positioned on pressure receiving chamber 58 1 sides of short circuit runner 77, thereby the opening that is positioned on pressure receiving chamber 58 1 sides of short circuit runner 77 is opened now, and fluid flows between pressure receiving chamber 58 and balance cylinder 60 by short circuit runner 77.As a result, the big negative pressure that produces in the pressure receiving chamber 58 is eliminated as quickly as possible, thereby prevents gas separation in the pressure receiving chamber 58 and ear-piercing noise and the vibration that is associated effectively.The predetermined negative pressure of threshold value of representing the opening and closing of cover plate part 72 is that the relative pressure between pressure receiving chamber 58 and the balance cylinder 60 is poor, but because vibration input is of short duration and balance cylinder 60 is held and is in barometric pressure substantially, so described predetermined negative pressure can be regarded as the force value of pressure receiving chamber 58 usually.Can be clear that from the preamble explanation, short circuit runner 77 is designed like this, promptly, when the absolute value of the negative pressure that produces in the pressure receiving chamber 58 during greater than described predetermined negative pressure (absolute value), the short circuit runner is in open mode, and as long as the absolute value of negative pressure or malleation less than the predetermined negative pressure in the pressure receiving chamber 58 (absolute value), the short circuit runner just is in closed state, and can determine predetermined negative pressure suitably according to desirable characteristics etc.In this embodiment, short circuit runner 77 is designed like this, that is, when pressure receiving chamber 58 with respect to the pressure difference of balance cylinder 60 and when therefore the absolute value of the negative pressure value in the pressure receiving chamber 58 is greater than predetermined value, the short circuit runner is in open mode.In addition, material that can be by revising leaf spring 70, size, shape etc. are established this predetermined negative pressure suitably, and the suitable grade with the rigidity of establishing leaf spring 70, the pressure that presses divider 56 etc. opens and closes so that this valve is depressed correctly in the predetermined negative of expection.
In the engine support 10 according to this embodiment structure, metal leaf spring 70 is used as valve, thereby compares as the situation of valve with rubber elastomer wherein etc., the size and dimension that can obtain to expect and have degree of precision and do not have deviation.Therefore, the opening and closing parameter (predetermined negative pressure) of the valve that changes according to the size and dimension of leaf spring 70 can be adjusted into predetermined value accurately.Make like this and can advantageously realize: in pressure receiving chamber 58, produce under the situation of negative pressure (its absolute value is less than the negative pressure of the absolute value of predetermined negative pressure), atmospheric pressure or malleation, realize effectiveness in vibration suppression by fluid flow function less than predetermined negative pressure; And, in pressure receiving chamber 58, produce surpassing under the situation of negative pressure (its absolute value is greater than the negative pressure of the absolute value of predetermined negative pressure) of predetermined negative pressure, the quick elimination by negative pressure reduces or abates the noise or vibrate.
In this embodiment, short circuit runner 77 is realized near the resiliently deformable that predetermined negative is depressed or the conversion between the opening and closing state can be passed through metal leaf spring 70 predetermined negative pressure.Therefore, compare with the situation of the resiliently deformable of rubber elastomer etc., can advantageously avoid occurring such situation, promptly distortion or the rotten initial value of the resiliently deformable of valve that makes owing to valve changes, thereby the negative pressure (predetermined negative pressure) that valve is opened or closed departs from its initial value.Therefore, can realize effectiveness in vibration suppression reliably, and reduce or eliminate cavitation so that reduce or abate the noise and vibrate based on fluid flow function.
Therefore, by using the leaf spring 70 that forms by the metallic material that does not have decay, can realize the opening and closing fast and accurately of valve.This makes can realize higher precision aspect following: when the negative pressure that produces pressure receiving chamber 58 in during greater than predetermined negative pressure, eliminate the noise and the vibration of cavitation generation; And, when (in pressure receiving chamber 58, producing) negative pressure during, realize effectiveness in vibration suppression based on the mobilization of the fluid that flows through orifice passage 64 less than predetermined negative pressure.
In addition, in this embodiment, by along on the whole length of direction of the diameter that passes divider 56 with cover plate accessory 67 folded leaning against on the divider 56, and between the lower surface of the upper surface of divider 56 and primary elastomeric elastomer 16, clamp two ends of cover plate accessory 67, thereby cover plate accessory 67 is connected leaf spring 70 on the main body of support.Be provided with by this, the cover plate accessory 67 with valve can easily be connected on the main body of support, and can obtain extraordinary productivity.
In this embodiment's engine support 10, by with the end clips of two length directions of cover plate accessory 67 between divider 56 and primary elastomeric elastomer 16, and the protuberance 65 that will be integrally formed into the middle part of divider 56 pushes the jack 68 at the middle part perpendicular to axial direction that is formed on cover plate accessory 67, make cover plate accessory 67 be connected to divider 56, thereby be connected to the main body of support.Therefore, can avoid occurring such problem, for example vibration or the misalignment that cause owing to suction of cover plate accessory 67 based on the negative pressure that produce in the pressure receiving chamber 58, thus can improve reliability.Particularly, by forming jack 68 and protuberance 65, can produce fastening force effectively by a spot of restraint location along middle part perpendicular to axial direction.
In addition, by being inserted near the positioning hole 69 that forms the end of length direction of cover plate accessory 67, can prevent effectively that cover plate accessory 67 from around protuberance 65 rotations, making reliability further improve from the outstanding positioning salients 66 of divider 56.
Next, Figure 4 and 5 illustrate automobile engine bracket 78 according to a second embodiment of the present invention.In the following description, structure is used the label indication identical with first embodiment with similar parts of first embodiment and part in accompanying drawing, and no longer describes in detail.
Particularly, the difference of this embodiment's engine support 78 and first embodiment's engine support 10 is to have the short circuit runner 82 that forms by the diameter middle part of divider 80.Engine support 78 also has the cover 84 as one-way valve that is used to make short circuit runner 82 to change between the opening and closing state, and this engine support uses disc spring 86 as the metal spring that is used for keeping cover 84 to be in the close position with the initial elasticity amount of deformation.
At length, this embodiment's short circuit runner 82 forms the diameter middle part by divider 80, thereby the pressure receiving chamber 58 and the balance cylinder 60 that form in the axial above and below of divider 80 respectively are interconnected.Short circuit runner 82 axially forms step portion 88 in the middle part at it, the part form of the composition that wherein is positioned at these step portion 88 tops vertically is the cover receiver portion 90 of major diameter circular hole, and the part form of the composition that is positioned at these step portion 88 belows vertically is the connection runner 92 of minor diameter circular hole.
Cover plate accessory 94 folded leaning against on the upper surface of divider 80.Cover plate accessory 94 is the shapes that approach, be roughly flat board, and as first embodiment, is arranged to lean against on the whole length of divider 80 along a direction of passing diameter is roughly folded.Lean against on the upper surface of divider 80 by cover plate accessory 94 is folded, the upper axial end of short circuit runner 82 is covered by cover plate accessory 94.As shown in Figure 5, the difference of this embodiment's cover plate accessory 94 and first embodiment's cover plate accessory 67 is, lacks: the U-shaped slit, be positioned at its inner leaf spring 70 and be fixed on rubber seal 74 on the leaf spring 70.On the contrary, along the circumferential direction form a plurality of through holes 96 that are made of the minor diameter circular hole that penetrates the middle part vertically, wherein cover receiver portion 90 is communicated with pressure receiving chamber 58 via these through holes 96.Cover plate accessory 94 in this embodiment constitutes arcuate section 98 in its part of position towards the diameter center from through hole 96, the in axial direction downward convex curved of this arcuate section, and an endlap of disc spring hereinafter described 86 leans against on this arcuate section 98, thereby along direction location disc spring 86 perpendicular to axial direction.This embodiment's cover plate accessory 94 is fixedly connected to the main body of support as first embodiment, the end of two length direction is sandwiched between the upper-outer circumference of the step portion 36 of primary elastomeric elastomer 16 and divider 80.
Disc spring 86 is arranged in the cover receiver portion 90.Disc spring 88 is arranged between the lower surface of cover plate accessory 94 and the cover 84 so that cover 84 is pushed against on the upper opening that connects runner 92 with compressive state.Disc spring 86 is positioned at the part of the approximate centre of cover plate accessory 94, and wherein the upper axial end of disc spring 86 is folded leans against on the convex arcuate part 98 that is formed on cover plate accessory 94 centers, thereby along direction location disc spring 86 perpendicular to axial direction.The diameter of disc spring 86 is more much smaller than the diameter dimension of cover receiver portion 90, thereby disc spring 86 is separated with the internal circumferential wall of cover receiver portion 90.Because tubulose disc spring 86 keeps pressing spherical cover 84, thus cover 84 be sandwiched between the upper opening (step portion 88) of disc spring 86 and connection runner 92, thereby and be positioned in cover receiver portion 90 along core perpendicular to axial direction.
Here, by being installed in the engine support 78 in the automobile according to this embodiment, when along the direction of approximate vertical during by first assembling set 12 and second assembling set, 14 inputted vibrations, poor according to the relative pressure between consequent pressure receiving chamber 58 and the balance cylinder 60, fluid flows through the orifice passage 64 between two chambers 58,60.Particularly, in this embodiment, orifice passage 64 has tuned to for example low-frequency range of motor shake, and when input low frequency, big amplitude vibration, because cover 84 is pressed against on the upper opening that connects runner 92 by the elastic force of disc spring 86 from axial top, so short circuit runner 82 remains in the roughly sealing state of fluid-tight, thereby can obtain effectively to flow, and can realize effectively resisting the effectiveness in vibration suppression of motor shake or other low frequency, big amplitude vibration according to the resonance effect of the fluid that flows by the fluid of orifice passage 64.
On the other hand, when engine support 78 stands big vibrational loading for example at vehicle roll or suddenly between deceleration period, produce high negative pressure in pressure receiving chamber 58, cover 84 is owing to the negative pressure of pressure receiving chamber 58 is subjected to roughly the suction that axially makes progress along support.When acting on suction on the cover 84 owing to the negative pressure in the pressure receiving chamber 85 when surpassing the thrust of disc spring 86, cover 84 moves up vertically.Thereby cover 84 and the upper opening that is connected runner 92 (step portion 88) separate, thus short circuit runner 82 open now, and fluid is mobile between pressure receiving chamber 58 and balance cylinder 60 by short circuit runner 82.As a result, the big negative pressure that produces in the pressure receiving chamber 58 can be eliminated as quickly as possible, thereby prevents gas separation in the pressure receiving chamber 58 and ear-piercing noise and the vibration that is associated effectively.
Advantage and previously described first embodiment according to the engine support 78 of this embodiment structure are similar.In addition, in this embodiment, can set the value of predetermined negative pressure by disc spring 86.Therefore, compare with the situation of using rubber elastomer to set the value of predetermined negative pressure, and compare with the situation of utilizing leaf spring 70 to set the value of predetermined negative pressure, can realize that short circuit runner 82 depresses conversion between the open and close state in the predetermined negative of regulation with higher precision.
Although only in currently preferred embodiment of the present invention, describe the present invention in detail, it should be understood that the present invention is in no way limited to the details of illustrated embodiment, but can have other form for explanation.
For example, in first and second embodiments, make cover plate accessory 67,94 be connected to the main body of support between the step portion 36 by cover plate accessory 67,94 being clipped in primary elastomeric elastomer 16 and the upper-outer circumference of divider 56,80.But, always must not connect cover plate accessory 67,94 between primary elastomeric elastomer 16 and the divider 56 by cover plate accessory 67,94 is clipped in.Particularly, the cover plate accessory can be fastening by screw, bonding or alternate manner be fixed on the divider.
In addition, cover plate accessory 67,94 always must be not stacked along the whole diameter of divider 56,80; On the contrary, the cover plate accessory can be arranged to make on part of its folded upper surface that leans against divider 56,80, and fastening or bonding is fixed on this divider by screw as described above.On the other hand, the entire upper surface that the cover plate accessory can stacked covering divider.
Described rubber seal 74 always must and can not save in first embodiment.Although in first embodiment, rubber seal 74 is fixed on the cover plate part 72 of leaf spring 70, and is opposite, and rubber seal 74 can be fixed on the upper surface of divider, thus cover plate part 72 via rubber seal 74 near divider.
In first and second embodiments, engine support 10,78 has the single orifice structure that only has an orifice passage 64, this orifice passage be tuned to produce the opposing low frequency, big amplitude is vibrated for example effectiveness in vibration suppression of motor shake.But, the present invention also can be used on for example in such engine support: the engine support with diplopore mouth structure, this structure have be tuned to produce low frequency, big amplitude vibrate the effectiveness in vibration suppression of motor shake for example first orifice passage and be tuned to produce high frequency, small magnitude vibrates for example second orifice passage of the effectiveness in vibration suppression of idling vibration; Perhaps have be tuned to produce the engine support of a plurality of orifice passages of effectiveness in vibration suppression of the vibration of different frequency scope.When the present invention is used in the engine support of the structure with a plurality of orifice passages, can provide short circuit runner and valve for the single orifice passage that is selected from a plurality of orifice passages, or, perhaps provide short circuit runner and valve for whole orifice passages in several orifice passages each provides short circuit runner and valve.
The shape of leaf spring 70 etc. always is not confined in embodiment in the literary composition specific open described.Particularly, although in first embodiment of preamble, incline section 71 forms obliquely and extends upward, and cover plate part 72 is positioned to separate above cover plate accessory 67 vertically, but leaf spring 70 always must not have this shape, and opposite, it can form feasible be positioned to basic and cover plate accessory 67 coplanes.
In first embodiment, there are the projection 65 be arranged on the divider 56 and positioning salient 66 jack 68 interior and the locating piece that engages of positioning hole 69 with being formed on cover plate accessory 67.But as shown in Figure 6, this locating piece is always unessential.As shown in Figure 6, the retaining part 76 that is integrally formed into rubber seal 74 can save.Engine support 100 shown in Fig. 6 has the structure roughly the same with first embodiment, and therefore uses same numeral in accompanying drawing, and not explanation in addition.
Should also be understood that those skilled in the art can carry out various changes, modification and improvement and can not break away from the spirit and scope of the present invention the present invention.
Claims (10)
1. a fluid filled type vibration damping device (10,78,100), this vibration damping equipment comprises:
First assembling set (12);
Second assembling set (14);
Elasticity connects the primary elastomeric elastomer (16) of first assembling set (12) and second assembling set (14);
Divider (56) by second assembling set (14) supporting;
Its wall section ground is limited and is sealed with the pressure receiving chamber (58) of incompressible fluid within it by primary elastomeric elastomer (16);
Its wall section ground limits and is sealed with the balance cylinder (60) of incompressible fluid within it by fexible film (50), and described chamber (58,60) are formed on the both sides of divider (56);
Utilize the orifice passage (64) that fluid is communicated with between divider (56) formation and authorized pressure receiving chamber (58) and balance cylinder (60);
Short-channel (77,82), this short-channel form in divider (56), and making can be by this short-channel (77,82) by short circuit by pressure receiving chamber (58) and balance cylinder (60) of orifice passage (64) connection;
Be provided for valve (70,84) that short-channel (77,82) is switched between open mode and closed state; And
Be provided for the metal spring (70,86) that under predetermined initial elasticity amount of deformation maintaining valve (70,84) is in closed state.
2. according to the fluid filled type vibration damping device (10 of claim 1,100), it is characterized in that, valve and metal spring are made of the leaf spring (70) of pressure receiving chamber one side that is arranged on divider (56), wherein, this leaf spring (70) is stacked and be pressed on the surface of divider (56) with predetermined initial elasticity amount of deformation, thereby short-channel (77) is covered by leaf spring (70) to the opening of pressure receiving chamber (58).
3. according to the fluid filled type vibration damping device (10,100) of claim 2, it is characterized in that the outer periphery that leaf spring (70) is included in divider (56) are fixed on the tongue piece that this divider (56) is gone up and extend towards the center of this divider (56).
4. according to the fluid filled type vibration damping device (10,100) of claim 2 or 3, it is characterized in that leaf spring (70) is by being supported between the outer periphery that are clipped in primary elastomeric elastomer (16) and divider (56).
5. according to the fluid filled type vibration damping device (10 of claim 2 or 3,100), it is characterized in that, this device also comprises the leaf spring body (67) of writing board shape, this leaf spring body has the U-shaped slit that passes its formation, so that the inside of this U-shaped slit is as leaf spring (70), and the outside of this U-shaped slit is with acting on the locating piece (66,69) of locating leaf spring body (67) with respect to divider (56).
6. according to the fluid filled type vibration damping device (10 of claim 5,100), it is characterized in that, on the surface that is positioned at pressure receiving chamber (58) one sides of divider (56), leaf spring body (67) extends on the whole length of divider along a direction perpendicular to axial direction, and the leaf spring body is sandwiched between divider (56) and the primary elastomeric elastomer (16) at its two end part.
7. according to the fluid filled type vibration damping device (78) of claim 1, it is characterized in that, valve (84) comprises the one-way valve that is installed in the short-channel (82), and metal spring comprises the disc spring (86) that is used for promoting towards closing direction this valve (84) that is connected on the divider (56).
8. according to the fluid filled type vibration damping device (10,78,100) of claim 1 or 2, it is characterized in that short-channel (77,82) forms from the center along its length of orifice passage (64) and puts towards a lateral deviation of the opening that feeds balance cylinder (60).
9. according to the fluid filled type vibration damping device (10 of claim 1 or 2,100), it is characterized in that, at the opening of the lip-deep short-channel (77) that is arranged in pressure receiving chamber one side of divider (56) and foldedly be provided with sealing material (74) on by the valve (70) on it at least one.
10. according to the fluid filled type vibration damping device (10 of claim 1 or 2,78,100), it is characterized in that, valve (70,84) pass through based on metal spring (70, the elastic force of predetermined initial elasticity amount of deformation 86) remains in closed state, and the absolute value of the negative pressure that produces when pressure receiving chamber (57) is greater than based on metal spring (70, during the absolute value of the predetermined negative pressure that elastic force 84) is determined, valve (70,84) is held and is in open mode, so that pressure receiving chamber (58) and balance cylinder (60) are communicated with by short-channel (77,82).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP267427/2005 | 2005-09-14 | ||
| JP2005267427 | 2005-09-14 | ||
| JP052971/2006 | 2006-02-28 |
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| CN1932329A true CN1932329A (en) | 2007-03-21 |
| CN100543338C CN100543338C (en) | 2009-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101538426A Active CN100543338C (en) | 2005-09-14 | 2006-09-13 | Fluid filled type vibration damping device |
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| CN (1) | CN100543338C (en) |
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