JP3702909B2 - Liquid filled mount - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid-filled mount that is used, for example, as an engine mount of an automobile and uses the flow resistance of liquid in an orifice for vibration damping.
[0002]
[Prior art]
The anti-vibration mount for an automobile engine is not only insulated against continuous engine vibration transmission during idling or running, but also due to low-frequency, large-amplitude vibration when starting the engine and bouncing of the vehicle body during running. There is a demand for excellent damping properties for quickly damaging impact vibration. In order to realize such a function, there is typically a liquid sealed mount (liquid sealed vibration isolator) disclosed in Japanese Patent Application Laid-Open No. 59-117930.
[0003]
In this liquid-sealed mount, the restriction between the first fluid chamber and the second fluid chamber, which undergoes a volume change due to deformation of the elastic body due to vibration input, is large and the flow resistance is small. It communicates through a through hole, and the through hole can be opened and closed by a solenoid valve structure.
[0004]
In other words, when the engine is started, the through hole is closed with a solenoid valve so that the filled liquid flows between the two fluid chambers through the orifice, so that a large amplitude vibration due to cranking of the engine is quickly attenuated by the flow resistance. be able to. Further, by opening the through hole during idle operation, the movement of the sealed liquid between the fluid chambers is short-circuited and the dynamic spring constant is reduced, so that the transmission of idle vibration can be effectively absorbed and insulated. . Further, by closing the through-hole again while the vehicle is running, the change in hydraulic pressure in the first fluid chamber caused by the continuous input of high-frequency vibration with a small amplitude due to the high-speed rotation of the engine is reduced between the second fluid chamber and the second fluid chamber. Is absorbed by the vibrational motion of the movable partition plate interposed therebetween, and the dynamic spring constant is reduced, so that the transmission of the high-frequency small-amplitude vibration can be effectively absorbed and insulated, and the large-amplitude due to the shake during running etc. When vibration is input, the movable range of the movable partition plate is limited, so that the filled liquid flows between the fluid chambers through the orifice, and the shock resistance during traveling is quickly stopped by the flow resistance. be able to.
[0005]
[Problems to be solved by the invention]
In the conventional liquid-filled mount, a movable partition plate and a disk member for housing the movable partition plate are required, so that the number of parts increases and the shape thereof must be complicated. In addition, the valve part that opens and closes the through-hole forms a cylindrical surface that slides in the axial direction with the inner peripheral surface of this through-hole, and in order to perform its operation smoothly, the sliding part must be machined with high precision. I must. Therefore, there is a problem that the manufacturing cost becomes high.
[0006]
The present invention has been made under the circumstances as described above, and its technical problem is that it has excellent vibration insulation against continuous engine vibration input and excellent control against large amplitude vibration input. The object of the present invention is to provide a liquid-filled mount with vibration properties at low cost.
[0007]
[Means for Solving the Problems]
  As a means for effectively solving the technical problem described above, the liquid-sealed mount according to the present invention has a flow resistance on a partition plate that partitions the first liquid chamber on the elastic body side and the second liquid chamber on the diaphragm side. And a through hole having a flow resistance smaller than that of the orifice is formed by communicating the two liquid chambers with each other, and a coil spring is formed on the diaphragm at the outer peripheral edge of the second liquid chamber side of the through hole. The valve that is in close contact by the biasing force is integratedA sub-diaphragm is formed on the inner periphery of the valve portion, which faces the inner peripheral space of the through hole and is repeatedly deformed by a change in the hydraulic pressure of the first liquid chamber acting through the through hole. It is. In this configuration, more preferably, a fluid pressure actuator that opens and closes the valve portion with a drive diaphragm that operates against the urging force of the coil spring by applying fluid pressure is attached to the mount case. Further, as other means, an orifice for generating a flow resistance in a partition plate that partitions between the first liquid chamber on the elastic body side and the second liquid chamber on the diaphragm side, and a through-hole having a smaller flow resistance than the orifice are described above. Both the liquid chambers are formed in communication with each other, and a valve portion that is in close contact with the outer peripheral edge of the through hole on the second liquid chamber side of the through hole by a biasing force of a coil spring is formed integrally with the mount case. In addition, in the liquid-filled mount to which the fluid pressure actuator that opens and closes the valve portion with a drive diaphragm that operates against the urging force of the coil spring by applying fluid pressure, the drive diaphragm is connected to the mount case. The diaphragm and the drive diaphragm are substantially tapered so that the inner periphery is higher than the outer periphery fixed to the integral actuator case. Facing the atmosphere opening chamber of the lower edge of the air opening window which is opened in said actuator case the height is the upper surface substantially matching the outer peripheral portion between. Alternatively, the outer peripheral edges of each of the diaphragm and the drive diaphragm are vulcanized and bonded to an actuator case integrated with the mount case.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In a preferred embodiment of the present invention, a sub-diaphragm is formed on the inner periphery of the valve portion so as to face the inner peripheral space of the through hole. That is, when high-frequency small-amplitude vibration is input in the closed state of the through-hole by the valve portion, the change in the hydraulic pressure in the first liquid chamber corresponding to the vibration displacement is absorbed by repeated deformation of the sub-diaphragm. It is.
[0009]
In addition, by providing the mount case with a fluid pressure actuator that incorporates a drive diaphragm that operates against the biasing force of the coil spring by applying a fluid pressure to the valve portion that opens and closes the through hole, the valve portion Can be opened and closed.
[0010]
That is, in this case, the valve portion formed in the diaphragm is normally in a state in which the through hole is closed by the urging force of the coil spring. Demonstrates vibration damping force due to flow resistance when circulating. For idle vibration input, the fluid pressure actuator forcibly separates the valve portion from the outer peripheral edge of the through hole against the biasing force of the coil spring, that is, by opening the through hole. In addition, it exhibits a vibration insulation effect due to a decrease in the dynamic spring constant. When the vehicle is driven at a high speed, the through hole is closed again, and the change in the hydraulic pressure in the first fluid chamber is applied to the expansion elasticity of the elastic body or the valve section in response to the input of high-frequency small-amplitude vibration due to engine vibration. Absorbed by repetitive deformation of the formed sub-diaphragm and exerts vibration insulation action due to a decrease in the dynamic spring constant. Similarly, the sealing liquid flows through the orifice by increasing the deformation amount of the elastic body to obtain a vibration damping force.
[0011]
When a sub-diaphragm for absorbing high-frequency small-amplitude vibration is formed in the valve portion, this sub-diaphragm is not connected to the first through the through-hole when a large load is input due to, for example, the above-described running shake. There is a concern that the liquid chamber may be damaged by receiving excessive liquid pressure from the liquid chamber. However, the force that presses the valve portion against the outer peripheral edge of the end on the second liquid chamber side of the through hole depends on the biasing force of the coil spring, so that the biasing force of the coil spring is appropriately set. If set, when the fluid pressure in the first fluid chamber exceeds a predetermined value, the valve portion opens the through hole against the biasing force of the coil spring, so that the sub-diaphragm can be prevented from being damaged. it can.
[0012]
Further, as described above, since the valve portion that opens and closes the through hole is operated by the drive diaphragm of this fluid pressure actuator, the drive diaphragm of this actuator is also formed integrally with the diaphragm of the mount together with the valve portion, so that the structure can be obtained. It can be simplified.
[0013]
In this case, the drive diaphragm of the fluid pressure actuator has a substantially tapered shape in which the inner peripheral portion is positioned higher than the outer peripheral portion fixed to the actuator case integrated with the mount case, and is provided in the atmosphere opening chamber between the diaphragm and the drive diaphragm. The height of the lower edge of the air opening window opened in the actuator case is substantially matched with the upper surface of the outer peripheral portion, thereby driving muddy water and sand that has entered the air opening chamber from the air opening window. Without being accumulated on the upper surface of the diaphragm, it is easily discharged to the outside. Further, the structure can be further simplified by integrally vulcanizing and bonding the outer peripheral edges of the diaphragm and the driving diaphragm integrated therewith to the actuator case connected to the mount case.
[0014]
【Example】
Several specific embodiments of the liquid filled mount according to the present invention will be described below together with the operation thereof with reference to the drawings.
[0015]
First, in the liquid-filled mount of the first embodiment shown in FIG. 1, the mount body 10 elastically connects the substantially cylindrical mount case 11 made of metal and the metal boss 12 arranged at the upper center thereof. An elastic body 13 made of an umbrella-shaped thick-walled elastomer and a diaphragm 14 made of a thin-walled sheet-shaped elastomer disposed on the lower side of the mount case 11 are provided. A partition plate 15 is fixed to partition the sealed space between the diaphragm 14 into a first liquid chamber A on the elastic body 13 side (upper side) and a second liquid chamber B on the diaphragm 14 side (lower side). The liquid chamber A and the second liquid chamber B are in communication with each other via an orifice C and a through hole D. A liquid (hereinafter referred to as an encapsulating liquid) is sealed in the sealed space including the first liquid chamber A, the second liquid chamber B, the orifice C, and the through hole D.
[0016]
The mount case 11 is an assembly in which a substantially cylindrical upper case member 111, an inner case member 112 disposed on the inner periphery of the upper case member 111, and a lower case member 113 are caulked together. Of these, the extension 113 a of the lower case member 113 is fixed to the vehicle body (not shown), and the boss 12 is fixed to the engine (not shown) via a bolt 121. The elastic body 13 is formed such that the outer diameter portion and the inner diameter portion are integrated with the inner case member 112 and the boss 12 of the mount case 11. A stopper 111 a extending to a position above the boss 12 so as to surround the upper portion of the elastic body 13 is formed on the upper case member 111 of the mount case 11, while the elastic body 13 is formed on the boss 12. A stopper plate 122 having a buffer body 123 made of an elastomer is formed on the outer peripheral portion located between the outer diameter portion (inner case member 112) and the stopper portion 111a. The relative displacement amount of the case 11 and the boss 12 is limited to prevent excessive compression deformation and tensile deformation of the elastic body 13 at the time of vibration input.
[0017]
The caulking portions of the case members 111 to 113 in the mount case 11 are disposed on the outer peripheral edge portion of the partition plate 15, the outer peripheral edge portion of the diaphragm 14 disposed on the lower side thereof, and further on the lower side thereof. The upper flange of the spring case 114 is clamped together. The inner case member 112 closely in contact with the upper surface of the outer peripheral edge portion of the partition plate 15 has an inverted U-shaped cross-sectional shape in which the inner peripheral portion 112a once extends upward and is further folded downward. The orifice C is defined by a line II-II in FIG. 1 between the inner peripheral portion 112a of the inner case member 112 on which a part of the elastic body 13 is wrapped and attached and the outer peripheral portion of the partition plate 15. As shown in FIG. 2 which has been cut, it extends in a C-shape that makes one round in the circumferential direction. One end of the orifice C in the circumferential direction is opened to the first liquid chamber A through a notch 112b formed in the inner periphery 112a of the inner case member 112, and the other end is a small hole 15a formed in the partition plate 15. To the second liquid chamber B.
[0018]
A cylindrical portion 151 that protrudes toward the second liquid chamber B (lower side) is formed at the center of the partition plate 15, and the through hole D is formed by the cylindrical portion 151. Since the orifice C is a narrow and narrow flow passage in the circumferential direction, a large flow resistance is generated when the sealed liquid flows through the orifice C, whereas the through hole D flows in comparison with the orifice C. Since the path length is sufficiently short and the cross section of the flow path is large, the flow resistance when the encapsulated liquid flows therethrough is small.
[0019]
A valve portion 141 made of an elastomer projecting annularly upward is integrally formed at the center portion of the diaphragm 14, and is opposed to a flange portion 152 formed at the lower end of the cylindrical portion 151 in the through hole D so as to be able to contact and separate. are doing. A coil spring 24 is interposed between the valve portion 141 reinforced by the metal ring 141a and the spring case 114 having an opening at the bottom center in a state where the coil spring 24 is appropriately compressed from its free length. 141 is in close contact with the flange 152 by the urging force of the coil spring 24. Further, an easily deformable sub-diaphragm 141b is formed on the inner periphery of the valve portion 141.
[0020]
According to the liquid-filled mount of the first embodiment, the valve portion 141 formed on the diaphragm 14 is normally pressed against the lower end flange portion 152 of the cylindrical portion 151 by the urging force of the coil spring 24, and the through hole D Is closed. For this reason, large-amplitude low-frequency vibration due to cranking at the time of engine start is input, and the volume of the first liquid chamber A changes as the elastic body 13 is repeatedly deformed between the mount case 11 and the boss 12. The through hole D is closed, so that the filled liquid flows between the first liquid chamber A and the second liquid chamber B through the orifice C and obtains a large damping force due to the flow resistance at that time. The cranking vibration is attenuated early.
[0021]
In addition, when continuous engine vibration in a high frequency range due to high-speed rotation of the engine while the vehicle is running is input, since this vibration has a small amplitude, the repeated change in the fluid pressure in the first fluid chamber A is caused by the through hole D. The fluid is absorbed by repeated displacement of the sub-diaphragm 141b on which the hydraulic pressure changes, so that the sealed liquid hardly circulates through the orifice C and the dynamic spring constant is kept low. The force transmitted through the sealing liquid between the boss 12 and the mount case 11 and the partition plate 15 when the vibration displacement is input is proportional to the pressure of the sealing liquid due to the volume change of the first liquid chamber A. For this reason, excellent vibration insulation against engine vibration is exhibited by absorbing the change in hydraulic pressure in the first fluid chamber A due to repeated deformation of the sub-diaphragm 141b. At this time, as the sub-diaphragm 141b is repeatedly displaced, the sealing liquid repeatedly moves through the through hole D in small increments, so that the through hole D generates appropriate attenuation different from the orifice C.
[0022]
In addition, when a large-amplitude vibration that causes a large fluid pressure change in the first fluid chamber A, such as an impact caused by a bouncing of a running vehicle body, exceeds the fluid pressure absorption capability due to repeated deformation of the sub-diaphragm 141b, is input. As the through hole D is closed, the sealed liquid flows between the first liquid chamber 1 and the second liquid chamber 2 through the orifice C as in the case of the cranking input described above. The flow resistance provides a good shock-absorbing property against impact input and suppresses the vibration in a short time.
[0023]
According to this liquid-sealed mount, the partition plate 15 that defines the first liquid chamber A and the second liquid chamber B is formed with a through hole D (cylindrical portion 151) by a single metal plate press-formed product. In addition, the orifice C is formed when the partition plate 15 and the inner case member 112 of the mount case 11 are caulked and assembled, and the valve portion 141 is also formed as a part of the diaphragm 14. In addition, since the small-amplitude high-frequency vibration is absorbed by the sub-diaphragm 141b formed in the valve portion 141 without using the conventional movable partition plate, the number of parts is small, the structure is simplified, and the cost is low. Can be produced. And since the valve part 141 consists of elastomer, the sealing performance in the obstruction | occlusion state of the through-hole D is good.
[0024]
In addition, when a vibration displacement of a large load due to an impact is input, if the hydraulic pressure in the first liquid chamber A is extremely increased due to the compression deformation of the elastic body 13 in the first half cycle, the sub diaphragm 141b 3A, the valve portion 141 is separated from the lower end flange portion 152 of the cylindrical portion 151 against the urging force of the coil spring 24, and the first liquid chamber A The fluid pressure is opened to the second fluid chamber B through the hole D. In the rebound process in which the first liquid chamber A is expanded with the restoring operation of the elastic body 13 in the next half cycle, the valve portion 141 again closes the through hole D by the urging force of the coil spring 24. As shown in FIG. 3B, the displacement of the sub-diaphragm 141b toward the through hole D due to the pressure difference between the negative pressure of the first liquid chamber A and the atmospheric pressure is It is regulated by contact with the lower end flange 152. For this reason, damage due to excessive deformation of the sub-diaphragm 141b at the time of input of the vibration displacement of the large load is prevented.
[0025]
According to an experiment conducted by the inventors, it has been found that the fluid pressure in the first fluid chamber A that rises due to an impact input such as a bouncing of the vehicle body is usually 1 to 1.5 atmospheres. Therefore, by setting the load of the coil spring 24 so that the valve opening pressure of the valve unit 141 becomes, for example, 1.5 to 2 atmospheres, the valve unit 141 is not opened by a normal impact input. Good attenuation by the orifice C is exhibited.
[0026]
  FIG. 4 shows a second embodiment of the liquid-filled mount according to the present invention. In the liquid-sealed mount according to this embodiment, a negative pressure actuator 20 for opening and closing the valve portion 141 is integrally provided on the lower side of the mount body 10 to add an absorption function for idle vibration as will be described later. Is.Further, for the purpose of enhancing the effect of reducing the vibration transmissibility with respect to continuous engine vibration of high frequency and small amplitude, a sub diaphragm 141b similar to the first embodiment is formed on the inner periphery of the valve portion 141 in the second embodiment. It is a thing.
[0027]
  In the negative pressure actuator 20, a substantially cylindrical upper member 211, an inner member 212 disposed at the lower inner periphery thereof, and a cup-shaped lower member 213 disposed below the upper member 211 are caulked together. It has an assembled actuator case 21 and is movably disposed in the actuator case 21.Retainer 22 integrally provided with valve portion 141And a driving diaphragm 23 formed such that the outer peripheral edge and the inner peripheral part are integrated with the inner member 212 and the retainer 22, and is appropriately interposed between the retainer 22 and the lower member 213. And a coil spring 24. The upper flange of the upper member 211 of the actuator case 21 is caulked integrally with the caulking portion of the mount case 11 together with the outer peripheral edge portion of the partition plate 15 and the outer peripheral edge portion of the diaphragm 14, and is illustrated on the lower member 213. A nozzle 25 for introducing a negative pressure into a negative pressure chamber E between the drive diaphragm 23 and the lower member 213 from a non-negative pressure generation source (for example, intake pressure by a piston of an engine or a pump is used) It has been established.The diaphragm 14 and the drive diaphragm 23 in the negative pressure actuator 20 are continuously formed by an elastomer together with the valve portion 141, and the inner circumference of the retainer 22 embedded integrally with the drive diaphragm 23. The portion 22a extends into the outer peripheral portion of the valve portion 141.
[0028]
  That is, when the negative pressure actuator 20 applies a negative pressure to the negative pressure chamber E, the retainer 22 is displaced downward so as to reduce the negative pressure chamber E together with the drive diaphragm 23 while compressing the coil spring 24. When the negative pressure is released, the retainer 22 is displaced upward by the urging force of the coil spring 24. Formed on the diaphragm 14 of the mount body 10The valve part 141 isRetainer 22 in negative pressure actuator 20Provided integrally withTherefore, it is displaced up and down integrally with the retainer 22, contacts and separates from the outer peripheral edge 152 at the lower end of the cylindrical portion 151, and opens and closes the through hole D.
[0029]
Next, the operation of the liquid-sealed mount according to the second embodiment will be described. In a normal state where no negative pressure is introduced into the negative pressure chamber E of the negative pressure actuator 20, as in the first embodiment, The valve portion 141 is in close contact with the lower peripheral edge 152 by the urging force of the coil spring 24 and the through hole D is closed. Therefore, in this state, a large-amplitude low-frequency vibration due to cranking at the start of the engine is input, and the first liquid chamber A is changed as the elastic body 13 is repeatedly deformed between the mount case 11 and the boss 12. When the volume change is received, as described above, the filled liquid flows between the first liquid chamber A and the second liquid chamber B through the orifice C, and obtains a large damping force due to the flow resistance at that time. The cranking vibration is attenuated early.
[0030]
Further, when the engine is idling, by applying a negative pressure to the negative pressure chamber E of the negative pressure actuator 20, the valve portion 141 is separated downward from the lower peripheral edge 152 of the cylindrical portion 151 and the through hole D is opened. . When idle vibration is input in this state, the movement of the sealed liquid between the two liquid chambers A and B is short-circuited through the through hole D, and the flow resistance is reduced. Is effectively absorbed and the dynamic spring constant is reduced, so that it exhibits excellent vibration insulation against idle vibration.
[0031]
  Further, by releasing the negative pressure in the negative pressure chamber E during traveling of the vehicle, the valve portion 141 is brought into close contact with the lower peripheral edge 152 of the cylindrical portion 151 again, and the through hole D is closed. In this state, when a continuous engine vibration in a high frequency range due to the high speed rotation of the engine is input, the amplitude of the vibration is extremely small.This change in hydraulic pressure is absorbed by the repeated displacement of the sub-diaphragm 141b through the through hole D.Therefore, even though the through hole D is closed, the filled liquid hardly circulates through the orifice C, the dynamic spring constant is kept low, and excellent vibration insulation is exhibited. Also, a large amplitude vibration that causes a large fluid pressure change in the first fluid chamber A that exceeds the fluid pressure absorption capability due to the expanded elastic deformation of the elastic body 13, such as an impact caused by a bounding vehicle body during traveling, is input. Then, since the through hole D is closed, the sealed liquid flows between the first liquid chamber 1 and the second liquid chamber 2 through the orifice C as in the case of the cranking input described above. The flow resistance at the time obtains a good shock-absorbing property against the impact input and suppresses the vibration in a short time.
[0033]
  thisSecond embodimentAccording to the above, the diaphragm 14 in the mount body 10 and the drive diaphragm 23 in the negative pressure actuator 20 are integrally formed via the valve portion 141.Because there are partsAnd the number of processes is reduced.
[0034]
  The second embodiment shown in FIG.In the liquid-sealed mount, the air opening chamber F is provided between the diaphragm 14 and the driving diaphragm 23, whereby the driving diaphragm 23 can be smoothly moved by applying or releasing the negative pressure to the negative pressure chamber E of the negative pressure actuator 20. While permitting operation, pressure propagation between the second liquid chamber B and the negative pressure chamber E is insulated. However,As shown in FIG.According to the bent shape of the drive diaphragm 23, muddy water, sand, or the like that has entered the atmosphere release chamber F from the atmosphere release window (not shown) opened in the upper member 211 of the actuator case 21 is driven while the vehicle is traveling. There is a risk that the durability of the driving diaphragm 23 may be significantly reduced due to accumulation in the valley space 23S of the diaphragm 23.
[0035]
  Therefore, the liquid-filled mount according to the present inventionThird embodimentIsFIG.As shown, the driving diaphragm 23 of the negative pressure actuator 20 has a substantially tapered shape in which the inner peripheral portion 23a integrated with the retainer 22 is relatively high with respect to the outer peripheral portion 23b fixed to the actuator case 21. The lower end edge of the air opening window 21a established in the upper member 211 of the actuator case 21 is made to substantially coincide with the upper surface position of the outer peripheral portion 23b. According to this configuration, the atmosphere opening chamber F is opened from the atmosphere opening window 21a.InEven if muddy water, sand, or the like invades once, such foreign matter flows down on the slope by the drive diaphragm 23 and is easily discharged to the outside from the atmosphere opening window 21a, so that it does not accumulate on the drive diaphragm 23. .
[0036]
  FIG.Is a liquid-filled mount according to the present invention.Fourth embodimentA cross-sectional view showingFIG.FIG. 3 is a front view showing the negative pressure actuator portion separately. The liquid-filled mount includes an annular upper flange 211a in which the upper member 211 in the actuator case 21 is caulked on the mount case 11, an annular lower flange 211b in which the lower member 213 in the actuator case 21 is caulked, The upper flange 211a and the lower flange 211b are composed of a pair of bridging portions 211c that bridge the target position in the circumferential direction 180 °, and the outer peripheral edges of the diaphragm 14 in the mount body 10 and the driving diaphragm 23 in the negative pressure actuator 20 respectively. The upper flange 211a and the lower flange 211b are integrally vulcanized and bonded. The diaphragm 14 and the drive diaphragm 23 areFIG.Similarly to the third embodiment shown in FIG. 4, the valve portion 141 and the elastomer are formed continuously with each other.
[0037]
A thick-walled portion 143 made of an elastomer is protruded from the center of the lower surface of the retainer 22 embedded in the valve portion 141, that is, the portion opposite to the valve portion 141. The thick portion 143 closes the negative pressure introduction nozzle 25 when the drive diaphragm 23 and the valve portion 141 are displaced downward by a predetermined amount due to the introduction of the negative pressure into the negative pressure chamber E. While effectively preventing an excessive differential pressure from acting on the diaphragm 23, it functions as a buffer.
[0038]
  The upper member 211 of the actuator case 21 has a pair of windows 211d and 211e located on both sides in the circumferential direction of the bridging portion 211c. The presence of the windows 211d and 211e causes the diaphragm 14 and the drive diaphragm 23 to be outside. The periphery can be baked (vulcanized and bonded) to the upper member 211 simultaneously with the molding. That is, when vulcanizing and molding a continuous molded body composed of the diaphragm 14, the valve portion 141, and the drive diaphragm 23 integrally with the upper member 211,FIG.As shown in FIG. 4, the upper mold 31 for molding the upper surface of the diaphragm 14 and the valve portion 141, the lower mold 32 for molding the lower surface of the drive diaphragm 23, and the circumferential direction for molding the lower surface of the diaphragm 14 and the upper surface of the drive diaphragm 23. A mold 30 including an intermediate mold 33 divided into two is used. Then, the upper member 211 and the retainer 22 are set in advance on the lower mold 32, and the intermediate mold 33 (33a, 33b) is caused to enter the upper member 211 from its window portions 211d, 211e so as to collide with each other. When the upper mold 31 and the lower mold 32 are clamped together, the outer peripheral edge faces the upper flange 211a and the lower flange 211b of the upper member 211 to form a continuous cavity 34.
[0039]
  Therefore, according to the liquid-filled mount of the fifth embodiment, the cost due to the diaphragm 14 in the mount body 10 and the drive diaphragm 23 in the negative pressure actuator 20 being integrally formed via the valve portion 141. In addition to the reduction effect, the actuator case 21Second and third embodimentsIn this case, the inner member 212 is not necessary.StructuralSimplification can reduce costs. Further, since the outer peripheral edge of the diaphragm 14 is vulcanized and bonded to the upper flange 211a of the upper member 211 of the actuator case 21, the caulking work with the mount case 11 and the partition plate 15 is facilitated, and the outer peripheral edge of the drive diaphragm 23 is achieved. Is vulcanized and bonded to the actuator case 21, the sealing performance of the negative pressure chamber E in the negative pressure actuator 20 is also improved, and the operation reliability is further enhanced.
[0040]
  In addition,Third embodiment of FIG.OrThe fourth embodiment of FIG.In the first orSecond embodimentSimilarly to the above, the sub-diaphragm 141b facing the inner peripheral space of the through hole D can be formed on the inner periphery of the valve portion 141 to improve the vibration insulation against continuous engine vibration in a high frequency range.
[0041]
【The invention's effect】
According to the liquid-filled mount of the present invention, the flow path of the filled liquid is switched by a solenoid valve as in the prior art, or compared with a structure that absorbs high-frequency small-amplitude vibration by a movable partition plate provided inside the partition plate. Since the structure is simplified, excellent vibration isolation performance can be realized at a low manufacturing cost, and durability can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of a liquid-filled mount according to the present invention.
FIG. 2 is a cross-sectional view taken along line II-II in FIG.
FIG. 3 is an operation explanatory diagram in the first embodiment.
FIG. 4 is a cross-sectional view showing a second embodiment of the liquid filled mount according to the present invention.
FIG. 5 is a cross-sectional view showing a third embodiment of the liquid filled mount according to the present invention.
FIG. 6 is a cross-sectional view showing a fourth embodiment of the liquid filled mount according to the present invention.
[Fig. 7]It is a front view which isolate | separates and shows the negative pressure actuator part in the said 4th Example from the mount main body.
[Fig. 8]It is explanatory drawing which shows the vulcanization molding process of the continuous molded object which consists of a diaphragm in the said 4th Example, a valve part, and a drive diaphragm.
[Explanation of symbols]
10 Mount body
11 Mount case
111 Upper case member
111a Stopper part
112 Inner case member
112a Inner circumference
112b Notch
113 Lower case member
14 Spring case
12 Boss
121 volts
122 Stopper plate
123 Buffer
13 Elastic body
14 Diaphragm
141 Valve
141b  Sub diaphragm
143 Thick part
15 Partition plate
15a small hole
151 cylindrical part
152 Bottom buttock
20 Negative pressure actuator (fluid pressure actuator)
21 Actuator case
21aOpen window
211 Upper member
211a Upper flange
211b Lower flange
211c bridge
211d, 211e Window
212 Inner member
213 Lower member
22 Retainer
23 Drive diaphragm
23a Inner circumference
23b Outer periphery
24 Coil spring
25 nozzles
30 mold
31 Upper mold
32 Lower mold
33 Intermediate type
34 cavities
A First liquid chamber
B Second liquid chamber
C Orifice
D through hole
E Negative pressure chamber
F Air release room

Claims (4)

An elastic body (13) made of an elastomer provided integrally between the mount case (11) and the boss (12) and continuous in the circumferential direction;
A diaphragm (14) made of a sheet-like elastomer provided integrally with the mount case (11) on the opposite side to the elastic body (13);
A partition plate provided on the inner periphery of the mount case (11) for partitioning the first liquid chamber (A) on the elastic body (13) side and the second liquid chamber (B) on the diaphragm (14) side (15) and
With
In the partition plate (15), an orifice (C) for generating a flow resistance and a through hole (D) having a smaller flow resistance than the orifice (C) are formed so as to communicate the two liquid chambers (A, B) with each other. And
The diaphragm (14) is integrally provided with a valve portion (141) that is brought into close contact with the outer peripheral edge (152) of the end of the through hole (D) on the second liquid chamber (B) side by the urging force of the coil spring (24). Formed into
Repetitively deformed by the change in the hydraulic pressure of the first liquid chamber (A) acting through the through hole (D) on the inner circumference of the valve part (141), facing the inner circumferential space of the through hole (D). A liquid-sealed mount, characterized in that a sub-diaphragm (141b) is formed . In the description of claim 1,
A fluid pressure actuator (20) is mounted on the mount case (11) to open and close the valve portion (141) with a drive diaphragm (23) that operates against the biasing force of the coil spring (24) by applying fluid pressure. This is a liquid-filled mount. An elastic body (13) made of an elastomer provided integrally between the mount case (11) and the boss (12) and continuous in the circumferential direction;
A diaphragm (14) made of a sheet-like elastomer provided integrally with the mount case (11) on the opposite side to the elastic body (13);
A partition plate provided on the inner periphery of the mount case (11) for partitioning the first liquid chamber (A) on the elastic body (13) side and the second liquid chamber (B) on the diaphragm (14) side (15) and
With
In the partition plate (15), an orifice (C) for generating a flow resistance and a through hole (D) having a smaller flow resistance than the orifice (C) are formed so as to communicate the two liquid chambers (A, B) with each other. And
The diaphragm (14) is integrally provided with a valve portion (141) that is brought into close contact with the outer peripheral edge (152) of the end of the through hole (D) on the second liquid chamber (B) side by the urging force of the coil spring (24). Formed into
A fluid pressure actuator (20) is attached to the mount case (11) to open and close the valve portion (141) by a drive diaphragm (23) that operates against the urging force of the coil spring (24) by applying fluid pressure. And
The drive diaphragm (23) has a substantially tapered shape in which an inner peripheral portion (23a) is positioned higher than an outer peripheral portion (23b) fixed to an actuator case (21) integrated with the mount case (11), The height of the lower edge of the air release window (21a) opened in the actuator case (21) facing the air release chamber (F) between the diaphragm (14) and the drive diaphragm (23) is set to the outer peripheral portion (23b). A liquid-filled mount characterized by being substantially coincident with the upper surface of An elastic body (13) made of an elastomer provided integrally between the mount case (11) and the boss (12) and continuous in the circumferential direction;
A diaphragm (14) made of a sheet-like elastomer provided integrally with the mount case (11) on the opposite side to the elastic body (13);
A partition plate provided on the inner periphery of the mount case (11) for partitioning the first liquid chamber (A) on the elastic body (13) side and the second liquid chamber (B) on the diaphragm (14) side (15) and
With
In the partition plate (15), an orifice (C) for generating a flow resistance and a through hole (D) having a smaller flow resistance than the orifice (C) are formed so as to communicate the two liquid chambers (A, B) with each other. And
The diaphragm (14) is integrally provided with a valve portion (141) that is brought into close contact with the outer peripheral edge (152) of the end of the through hole (D) on the second liquid chamber (B) side by the urging force of the coil spring (24). Formed into
A fluid pressure actuator (20) is attached to the mount case (11) to open and close the valve portion (141) by a drive diaphragm (23) that operates against the urging force of the coil spring (24) by applying fluid pressure. ,
A liquid-sealed mount in which the outer peripheral edges of the diaphragm (14) and the drive diaphragm (23) integral with the diaphragm (14) are vulcanized and bonded to an actuator case (21) integral with the mount case (11) .

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