JPS60113833A - Mounting device of power unit - Google Patents

Abstract

PURPOSE:To enable a mounting device to display a low dynamic spring characteristic, high dynamic spring characteristic and a high damping characteristic under the same frequency, by providing the first and the second orifices in a separator member and enabling the third fluid chamber to be disconnected from a balancing chamber by a control signal from the outside. CONSTITUTION:The first orifice 50 of small sectional area and the second orifice 52 of large sectional area are provided in a separator plate 12 and a core member 32. Then the core member 32 provides in tis bottom part an actuator member 46 having a through hole 56, and the actuator member 46 is adapted to the core member 32 by a signal from a control device 38, enabling the third fluid chamber 16 to be disconnected from a balancing chamber 26. In this way, a high dynamic spring characteristic and a high damping characeristic can be displayed together with a low dynamic spring characteristic under the same frequency by confining non-compressible fluid in the third fluid chamber 16 so as to enable a dynamic spring constant to be increased as the whole mounting device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting device for a power unit, and particularly to a mounting device for mounting a power unit between a vehicle body and a power unit, which allows the spring characteristics and damping characteristics to be arbitrarily changed depending on the driving condition of the vehicle. The present invention relates to a mounting device.

Conventionally, when installing a power unit in which an engine and a transmission are integrated into a vehicle body, it is necessary to support the power unit, suppress the transmission of vibration input from the engine and vibration input from the road surface during driving, and A structure is adopted in which a mounting device for damping or preventing vibration is interposed between the power unit I- and the vehicle body.

Therefore, such a mounting device generally has vibration damping characteristics for suppressing vibrations of 5 to 30 H2 due to input from the road surface during driving and input from the power unit during idling, and vibration damping characteristics for suppressing vibrations of 5 to 30 H2 due to input from the power unit during idling. Vibration damping properties are required to dampen inputs of 301 (z or more), but the conventional two machining allowances have a mounting structure in which insulator rubber is interposed between the metal fittings. When a rubber material with good damping performance is used to achieve this effect, there is a problem in that the spring constant increases in the high frequency range, and therefore the vibration transmission force becomes large, making it impossible to obtain a good vibration isolation effect. On the other hand, if a rubber material with a small spring constant is used in order to enhance the vibration damping effect, the loss coefficient will be small, and therefore there will be a problem that lti and damping performance will be reduced.

In particular, during engine shake (resonance state of the engine mass-mount suspension system) while the vehicle is running, sudden starts,
In order to suppress the vibration or movement of the power uniso 1 during sudden torque fluctuations such as during sudden acceleration, it is desirable to use a mounting I function that has high damping and high spring characteristics.On the other hand, when idling or When driving at high speeds, etc., it is desirable to use a mounting I-function with low splash characteristics in order to reduce and increase the transmission rate of vibration input from the power uni-so I to the vehicle body, but conventional mounting devices However, it was not always possible to meet this demand.

On the other hand, elastic supports with a structure that utilizes the elasticity of rubber and fluid flow resistance, so-called fluid-filled mounts, have been proposed. At least one chamber (liquid chamber) and the other chamber (liquid chamber) are partitioned by a fixed partition plate, and an orifice of an appropriate diameter and length is provided in the partition plate, and through the orifice, A structure has been revealed in which a large loss coefficient can be exhibited in the low frequency range by flowing the liquid from one chamber to the other.

However, with such a structure, there is a problem that the liquid becomes difficult to flow through the orifice in response to vibrations in a high frequency range, and the liquid pressure inside the liquid chamber increases, which inevitably increases the dynamic spring constant. Therefore, it was not desirable as a mounting device for the above-mentioned power unit. However, if the amount of volume change during vibration is increased in an attempt to increase the loss coefficient in the low frequency range, the dynamic spring constant in the high frequency range will also increase at the same time.

The present invention has been made against this background, and its purpose is to improve the damping performance and spring constant, which are the basic performances, in the fluid-filled mounting device as described above. It is designed so that it can be changed as appropriate depending on the driving condition of the vehicle, thereby making it possible to easily and effectively exhibit both the vibration damping characteristics in the low frequency range and the vibration damping characteristics in the high frequency range. The goal is to provide a structure that is

In order to achieve this object, the present invention provides an elastic body on one side of the partition member to define a pressure receiving chamber within the elastic body, and a pressure receiving chamber on the other side of the partition member. An equilibrium chamber is formed by an enclosure at least partially made of a flexible thin film, and the pressure receiving chamber and the equilibrium chamber are communicated through an orifice, while a predetermined incompressible fluid is supplied into the pressure receiving chamber and the equilibrium chamber. In the enclosed mounting device interposed between the vehicle body and the power unit, (a
) A first orifice with a small cross-sectional area and a second orifice with a large cross-sectional area are provided as the orifices;
A third liquid chamber is further provided in the elastic body, and the third liquid chamber is communicated with the equilibrium chamber, and (b) a position in which the pressure receiving chamber and the equilibrium chamber are in communication through at least the second orifice; an actuating member that can take two positions, a position in which the pressure receiving chamber and the equilibrium chamber are in communication only through the first orifice;
c) support means for retaining the actuating member in one of two communicating positions; and (d) energized by an external electrical input, the energization causing the actuating member to actuate; Electromagnetic means is provided which is positioned in the other communicating position against the holding action of the support means and which interrupts communication between the third liquid chamber and the equilibrium chamber.

Therefore, according to the configuration of the present invention, one of the two orifices that communicates the pressure receiving chamber and the equilibrium chamber (
2) is activated by the magnetization of the actuating part by electromagnetic means which is actuated by an external electrical input,
By closing or opening it, it became possible to create any flow resistance based on the flow of incompressible fluid between the pressure receiving chamber and the equilibrium chamber through the other (first) orifice. That is, by controlling the electromagnetic means according to the driving conditions of the vehicle, it is possible to achieve a mount function that can most effectively attenuate or isolate vibrations input in various driving conditions. This makes it possible to exhibit both vibration damping properties in the low frequency range and vibration isolation properties in the high frequency range.

In addition, according to the mounting structure of the present invention,
By blocking the communication to the equilibrium chamber, the incompressible fluid becomes trapped in a third liquid chamber provided in the elastic body,
This in turn contributes to an increase in the dynamic spring constant of the mounting as a whole, which allows for example 1
At a frequency of 5 Hz, it has become possible to realize a mounting function that can exhibit low dynamic spring characteristics, a linear spring constant, and high damping characteristics.

Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail based on the drawings.

First, FIGS. 1 and 2 show an embodiment of the mounting device of the present invention. In this case, 2 is a metal fitting, which is fixed so that the threaded part thereof penetrates the center of the flat plate 4 and protrudes outward.
The attachment to the engine side member has ports 1-6. This receptacle fitting 2 is attached to upper plays 1 to 10 provided at the end of a cylindrical rubber block 8 as an elastic body.
On the other hand, it is secured in a liquid-tight manner by caulking.

Further, the lower part of the rubber block 8 is fixed to one side of a partition plate 12 which is a partition member. Therefore, inside the rubber block 8, the upper part is attached to the metal fitting 2.
A pressure receiving chamber 14 defined by the plate 4 and the partition plate 12 at the bottom of C is formed approximately at the center thereof. Furthermore, within the rubber block 8, as shown in FIGS. 1 and 2, there are two arc-shaped sub-liquid chambers (third liquid chambers) 16 and 16 located outside the pressure-receiving chamber 14. It is provided. Then, an outer restraining ring 18 and an inner restraining ring 20 are buried so as to be located on the outer circumferential surface of the rubber block 8 and on the inner side of the inner surface of the sub-liquid chamber 16, respectively. It is designed to prevent deformation (bulge). Note that the upper plate 10, the partition plate 12, and the outer and inner restraining rings 18, 20 can be easily manufactured as an integral member by being vulcanized and bonded at the same time when the rubber block 8 is vulcanized and molded. It is.

A stepped portion of the opening of the bottomed cylindrical protective camp 22 is caulked to the peripheral edge of the partition plate 12, and this caulking action causes the peripheral edge of the diaphragm 24 as a flexible thin film to be crimped. is pressed against the partition plate 12, so that the partition slope 12 and the diaphragm 2
A liquid-tightly partitioned equilibrium chamber 26 with a variable volume is formed between the two. A takeaway bolt 28 is disposed approximately in the center of the protection camp 22, and the threaded portion of the protection camp 22 extends through the takeaway bolt 28. Therefore, the predetermined attachment on the vehicle body side is adapted to be attached to a member (not shown). Further, the through hole 30 of the protective cap 22 is a through hole for allowing air to circulate inside and outside the protective cap 22.

Furthermore, a recess is formed on the side of the partition plate 12 facing the equilibrium chamber 26, in which a core member 3 made of a magnetic material is inserted.
2 was inspected through JW34 made of non-magnetic material,
Fixed. Further, a coil 36 is arranged around the core member 32, and the core member 32 is excited by input to the coil 36 from an external power source. That is, the electrical input to the coil 36 is performed under the control of a control device 38, as shown in FIG.
For example, speed sensor, accelerator opening sensor, shift lever
It receives a signal from a position sensor, etc., uses its logic circuit to identify the running state of the vehicle, and based on this, a predetermined current (voltage) is turned on or off to the coil 36. .

Further, a cylindrical rubber sleeve 42 having an inwardly protruding wall portion is provided at its base so as to surround the electromagnetic means consisting of a core member 32 and a coil 36 disposed on the partition plate 12. It is arranged by fitting a fixed seat 44 into a fixed member, and a valve plate (operating member) 46 made of a magnetic material such as iron is fixed to the opening of the rubber sleeve 42. Note that the seat 44 and the valve plate I/46 can be vulcanized and bonded at the same time when the rubber sleeve 42 is vulcanized and molded. An intermediate chamber 48 surrounded by the rubber sleeve 42, the valve plate 46, and the partition plate 12
is formed within the equilibrium chamber 26.

The partition slope 1 is opened into this intermediate chamber 48.
A first orifice 50 having a small cross-sectional area and a second orifice 52 having a large cross-sectional area are provided further penetrating the core portion 32, Further, passages 54 are provided through the partition plate 12 to communicate the intermediate chamber 48 and the two sub-liquid chambers 16 formed in the rubber block 8, respectively.

Meanwhile, the first and second orifices 50 of the core member 32 are fixed to the rubber sleeve 42 as a support member.
A large through hole 56 is formed at a position corresponding to the opening of the first orifice 50 in the valve plate 46 held at a predetermined distance from the end face where the core member 32 is opened. When the valve plate 46 is magnetized by the excitation of the electromagnetic means consisting of the core member 36 and the core member 36, the opening of the second orifice 52 is closed by the surface of the valve plate 46, while the opening of the first orifice 50 is closed.
The opening] is not closed, so that the equilibrium chamber 26 and the pressure receiving chamber 14 are communicated through the first orifice 50 through the through hole 56. It is.

Note that, due to the magnetic attachment of the valve plate 46 to the core member 32, the intermediate chamber 48 is isolated from the equilibrium chamber 26 and the pressure receiving chamber 14, and is communicated only with the sub-liquid chamber 16 formed within the rubber block 8. It becomes a closed room.

In addition, the pressure receiving chamber 14 and the sub-liquid chamber 1 as a third liquid chamber are also provided.
6. Predetermined incompressible fluids such as water, polyalkylene glycol (such as polyethylene glycol), silicone oil, and low molecular weight polymers are sealed in the equilibrium chamber 26 and the intermediate chamber 48, respectively. When the valve plate 46 is not magnetically attached to the core member 32, fluid flows freely between the chambers through the first and second orifices 50, 52, the passages 54, and the through holes 56, respectively. I'm starting to get it.

Therefore, in the mounting device configured as described above, when the coil 36 is energized under the control of the control device 38 in accordance with the driving state of the vehicle, the core member 36
2 and the coil 36 become an electromagnet, and by its excitation,
The valve plate I.46 held by the rubber sleeve 42 is attracted against the holding action of the rubber sleeve 42 and is magnetically attached. In this magnetic state, the second orifice 52 is closed -1 by the valve plate 46, but the first orifice 50 is
Since the presence of the passage hole 56 maintains the open state, the communication between the pressure receiving chamber 14 and the equilibrium chamber 26 is only through the first orifice 50, and therefore there is no interference between the two. The flow of the compressible fluid takes place only through the first orifice 50. Therefore, by appropriately setting the diameter (cross-sectional area) and length of the first orifice 50, the excitation input can be controlled. Then, the incompressible fluid in the pressure receiving chamber 14 passes through the first orifice 50 to the equilibrium chamber 26.
A large viscous damping occurs due to the flow resistance caused when reaching the comb portion (8) which restrains the incompressible fluid.
, Z, act in parallel, and the amplification of the dynamic spring constant is either insufficient or achieved.

Therefore, in the structure of the above example, such a rubber part (
8) is further provided with an auxiliary liquid chamber 16, and this auxiliary liquid chamber 16 is provided with a rubber sleeve 42, a valve plate 46, and a partition plate 12 in a magnetically attached hearing device of the valve plate 46 as described above. The incompressible fluid in the sub-liquid chamber 16 communicates only with the closed space surrounded by , is in a confined state together with the fluid in the intermediate chamber 48, and since this fluid is incompressible, the constraint conditions of the rubber part (8) forming the sub-liquid chamber 16 and the valve plate 46 are Rubber sleeve 42 (
The constraint condition of the spring) will act as a spring,
Since the comb portion (8) is connected in parallel with the spring acting as a support, a high dynamic spring constant can be realized.

On the other hand, when the power supply to the coil 36 is cut off by the control device 38, the valve plate 4 which was magnetically attached to the core member 32
6 returns to its original state due to the restoring force (elasticity) of the rubber sleeve 42 (the state shown in FIG. 1), thereby opening the second orifice 5.
Since the blockage of the valve plate 1 by 46 in No. 2 is released, the pressure receiving chamber 14 and the equilibrium chamber 26 are in an open state in which they are communicated with each other through the second orifice 52 as well as the first orifice 50. The sub-liquid chamber 16 and the intermediate chamber 4
8, the pressure receiving chamber 14 and the equilibrium chamber 2 are communicated with each other through the through hole 56 of the valve plate 46 and the first and second orifices 50, 52.

In such a released state, the incompressible fluid in the pressure receiving chamber 14 and the sub-liquid chamber 16 smoothly follows the change in the rubber block 8 when external vibration is input.
The diaphragm 24, which forms the equilibrium chamber 26, is only slightly involved as a spring. In other words, the increase in the cross-sectional area of the orifice allows the fluid to move smoothly between the chambers, with almost no attenuation occurring at the orifice. Since almost no spring is generated, the spring of the rubber body of the rubber block 8 becomes the main component, and soft spring characteristics are realized, thereby achieving low dynamic spring and low damping characteristics.

As described above, the damping performance of the mounting device having such a structure is achieved by manipulating the cross-sectional area of the orifice by operating the electromagnetic means constituted by the core member 32 and the coil 36. Control can be achieved by establishing communication between the first orifice 50 only, or the first and second orifices 50 and 52. By appropriately reducing the cross-sectional area of the orifice, damping can be increased, and the spring constant can be adjusted by reducing the cross-sectional area of the orifice. By restricting the flow of water and keeping the liquid in the sub-liquid chamber 16 confined within the liquid chamber, it is effectively increased, and thereby the linear spring characteristic can be exhibited.

As described above, the dynamic spring and damping characteristics of the mounting device can be controlled by the operating state of the electromagnetic means consisting of the core member 32 and the coil 36, which is controlled by the external control device 38. The vibration constant and damping force of the mounting device can be changed arbitrarily depending on the operating conditions of the vehicle, such as during fluctuations, when idling, or when driving at high speeds, thereby providing the most suitable vibration countermeasure for various operating conditions. It became possible to obtain it.

Further, FIG. 3 shows another embodiment of the mounting device according to the present invention, which is structurally similar to the embodiment described above, so similar parts have the same reference numerals. The explanation will be omitted and the different parts will be described below.

First, in the mounting device shown in FIG. 3, the rubber block 8 is attached by vulcanization bonding directly to the plate 4 of the metal fitting, while the end of the rubber block 8 on the partition member side The lower part plays 1 to 5.
8 is vulcanized and bonded, and unlike the previous example, the rubber block 8 is not directly vulcanized and bonded to the partition member. This is based on the difference in the method of forming the pressure receiving chamber 14 and the sub-liquid chamber 16 formed in the rubber block 8. In the previous example, the engine mounting of the rubber block 8 was performed from the metal fitting 2 side to the pressure receiving chamber 14 and the sub-liquid chamber 16. In contrast to the structure in which the rubber block 8 is vulcanized and molded in a vulcanization mold in which a pin or member to form the sub-liquid chamber 16 is inserted, this embodiment , the partition member is attached by vulcanizing the rubber block 8 in a vulcanization mold with pins or members for forming the pressure receiving chamber 14 and the sub-liquid chamber 16 inserted from the side. This means that For this reason, the lower plate 58 fixed to the rubber block 8 is formed with corresponding openings 60 and 62 of a size corresponding to the pressure receiving chamber 14 and the sub-liquid chamber 16.

The partition member is composed of a plate 64 that is brought into contact with the opening 60 of the lower plate 58 from below so as to close it, and a core member 66, and the peripheral edge of the core +A66 is The protection cap 22 is held liquid-tight by the caulking action on the lower plate 58, and the attachment of the plate 64 and the core member 66 forms the pressure receiving chamber 14 within the rubber block 8, while the pressure-receiving chamber 14 is formed between the diaphragm 24 and , an equilibrium chamber 26 is formed. In addition, the plate 64 and the core member 6
A first orifice 50 with a small cross-sectional area and a second orifice 52 with a large cross-sectional area are respectively provided through the core member 66 in order to communicate the sub-liquid chamber 16 with the equilibrium chamber 26. The passage 5 has a large cross-sectional area that does not adversely affect the flow of fluid in the sub-liquid chamber 16.
4 is formed. Additionally, the coil 36 is positioned outside the first and second orifices 50.52.
It is inserted and arranged within the core member 66.

The valve plate 46, which is magnetically attracted to the electromagnetic means constituted by the core member 66 and the coil 36, is held liquid-tight at its peripheral edge by an annular rubber 68. The outer peripheral edge of the diaphragm 24 is pressed against and held by the core member 66 together with the peripheral edge of the diaphragm 24 by the caulking action of the protective camp 22 .

As a result, the core member 66 and the valve plate 46
With a predetermined gap formed between the valve plate 46 and the annular rubber 68, the valve plate 46 is held by the annular rubber 68.
In addition, the valve plate 46, the annular rubber 68, and the core member 66
An intermediate chamber 48 is formed, and through this intermediate chamber 48,
The pressure receiving chamber 14 and the sub-liquid chamber 16 are configured to communicate with the equilibrium chamber 26 through the first and second orifices 50 and 52, the passage 54, and the through hole 56.

Therefore, even if the mounting device has such a structure,
By causing the control device 38 to control the energization of the coil 3G according to the driving state of the vehicle detected by the sensor 40, the valve plate 46 is magnetically attached to or separated from the core member 66, and Such a valve plate 4
Due to the magnetization behavior of No. 6, as in the above embodiment, the liquid flows only through the first orifice 50, large viscous damping occurs due to liquid confinement in the sub-liquid chamber 16, and a high spring constant occurs, etc. can be realized appropriately.

Although two embodiments of the present invention have been described in detail above, the present invention is not to be construed as being limited only to these illustrative embodiments, and the present invention is not intended to be interpreted as being limited to these illustrative embodiments. Various changes, modifications, improvements, etc. can be made to the invention.

For example, in the previous example, the sub-liquid chamber 16 is
These two sub-liquid chambers 16 are composed of narrow arc-shaped portions with a predetermined length that are symmetrically provided within the chamber.
There is no problem even if it is integrally formed in the rubber block 8 so as to surround the pressure receiving chamber 14 (Also, instead of providing the inner restraining ring 20 on the side of the sub-liquid chamber 16, , it is also possible to arrange it on the inner surface of the rubber block 8 on the pressure receiving chamber 14 side.

Further, as shown in FIGS. 4 and 5, the core member 32
The guide pin 70 that guides the valve plate 4G, which is magnetically set to the electromagnetic means consisting of the coil 36 and the core part)! A
32, and the valve brake 1 and the core member 32 are installed vertically.
46 can be magnetized and detached under the guidance of the curved guide pin 70. Furthermore, the rubber sleeve 42 may have a shape other than the above-mentioned curved shape. Even if it has a straight cylindrical shape as shown in FIG. 4, there is no problem.

Furthermore, the formation of the first and second orifices 50, 52 only forms a communication passage 72 with a large cross-sectional area passing through the partition plate 12 and the core member 32, as shown in FIGS. 6 and 7. A first through hole 74 with a small cross-sectional area corresponding to the first orifice 50 is provided in the stop valve plate 46 at a position opposite to the communication passage 72, and by magnetic attachment,
By providing a plurality of second through holes 76 whose total cross-sectional area is the same as that of the end face of the core member 32, when the valve plate 46 is magnetically attached, the first through hole 7
4 to form a first orifice, while when the valve plate 46 is released from magnetization, a plurality of 20 through holes 7 are formed.
It is also possible to allow the incompressible fluid to flow freely at 6, so that large viscous damping does not occur.

In addition, as shown in FIGS. 8 and 9, the partition plate 1
If the through hole 78 provided in the valve plate 46 is provided eccentrically with respect to the communicating path 72 that passes through the valve plate 46 and the core member 32, the contact between the valve plate 46 and the core member 32 due to magnetic attraction The cross-sectional area of the passage becomes small at the overlapping portion of the communicating passage 72 and the through hole 78, and the first orifice is formed there. Furthermore, when the valve plate 46 having the through hole 78 is not magnetized, the communication path 72 and the through hole 78 become a second orifice, and the incompressible fluid between the pressure receiving chamber 14 and the equilibrium chamber 26 is free. distribution is allowed.

Furthermore, in FIG. 10, a groove 80 with a predetermined cross-sectional area is formed on the end surface of the core member 32 on the side where the valve plate 4G comes into contact, and through this groove 80,
When the valve plates 1 and 46 are magnetized, the communication passage 72 on the partition member side and the passage hole 78 on the valve plate 46 side are brought into communication in a small passage cross-sectional area, thereby forming a first orifice. On the other hand, even a structure in which the communication passage 72 and the through hole 78 having a large cross-sectional area function as a second orifice when the valve plate 46 is not magnetized may be adopted in the present invention. is possible.

In addition, a metal valve plate 4 made of a magnetic material is added to the electromagnet means made of the core member 32 and the coil 36.
6 is magnetically attached, in order to eliminate metal-to-metal contact and to enhance the sealing effect of the orifice, the valve plate 46 is attached as long as it does not adversely affect the magnetic operation of the valve plate 46. A buffer material made of a rubber polymer material or the like may be provided on at least one of the open surfaces of the plate 46 and the core member 32, and the -
An example is shown in FIG. That is, in FIG. 11, when the rubber sleeve 42 is vulcanized, a rubber layer 82 with a predetermined thickness is formed as a buffer +8Fi on the side of the valve plate 46 facing the core member 32.

In addition, in the upper structure, the electromagnetic means is energized (ON).
), the valve plate 46, which is the operating member, is connected to the core member 3.
2, but on the other hand, when the coil 36 is energized, the valve plate 46 is attached to the core member 32.
It is also possible to operate it so that it is separated from the For example, the valve plate 46 may be a permanent magnet.
On the other hand, the core member 32 may be given the opposite polarity by being energized.

As described above, the present invention can be implemented in various forms, and there are various forms other than the above-mentioned examples.
Although it is not necessary to further exemplify them here, it goes without saying that all of these various embodiments are included within the scope of the present invention as long as they do not depart from the spirit of the present invention. By the way.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of a mounting device according to the present invention, FIG. 2 is a cross-sectional view taken along the line nn in FIG. 1, and FIG. FIG. 4 is a cross-sectional view of main parts showing another example of the structure of the peripheral portion of the partition plate and valve plate, and FIG. 5 is a bottom view of the portion shown in FIG. 4. 6 and 8 are main part sectional views showing other examples of the part shown in FIG. 4, respectively,
7 and 9 are bottom views of FIGS. 6 and 8, respectively, and FIGS. 10 and 11 are sectional views of essential parts showing still other different examples of the portion of FIG. 4, respectively. . 2: Retainer fitting 8: Rubber block 12: Partition plate 14: Pressure receiving chamber 16: Sub-liquid chamber (third liquid chamber) 18: Outer restraint ring 20: Inner restraint ring 22: Protective cap 24: Diaphragm 26: Equilibrium Chamber 32: Core member 36: Coil 38: Control device 40: Sensor 42: Rubber sleeve (support means) 46: Valve plate (actuating part) 48: Intermediate chamber 50: First orifice 52: Second orifice 54: Passage 56: Through hole 64 Nibrate 66: Core member 68: Annular rubber 70: Guide pin 72: Communication passage 82: Rubber layer Applicant Tokai Rubber Industries Co., Ltd. Figure 1

Claims (1)

[Claims] +11 An elastic body is provided on one side of the partition H to define a pressure receiving chamber within the elastic body, and at least a portion of the partition member H is made of a flexible thin film on the other side. An equilibrium chamber is formed with an enclosure, and the pressure receiving chamber and the equilibrium chamber are communicated through an orifice, and a predetermined incompressible fluid is sealed in the pressure receiving chamber and the equilibrium chamber, between the vehicle body and the power unit. In the mounting device interposed in the orifice, a first orifice with a small cross-sectional area and a second orifice with a large cross-sectional area are provided, and a third liquid chamber is further provided in the elastic body, The third liquid chamber is communicated with the equilibrium chamber, and at least a position in which the pressure receiving chamber and the equilibrium chamber are in communication through the second orifice, and a position in which the pressure receiving chamber and the equilibrium chamber are in communication only through the second orifice. an actuating member capable of assuming two positions; a supporting means for holding the actuating member in one of the two communicating positions; and a support means that is energized by an external electrical input and that the energizing causes the actuating member to be activated. electromagnetic means for actuating the member to position it in the other communicating position against the holding action of the support means and for interrupting communication between the third liquid chamber and the equilibrium chamber; Features a power unit mounting device. (2) The mounting device according to claim 1, wherein the electromagnetic means includes a core member provided on the side of the equilibrium chamber of the partition member and a coil arranged around the core member. (3) the support means is a cylindrical member made of an elastic material disposed around the electromagnetic means, and the actuating member is attached to an opening of the cylindrical member; An intermediate chamber surrounded by the actuating member, the cylindrical portion, and the partition member is formed, and a through hole communicating the intermediate chamber and the equilibrium chamber is formed in the actuating member. The mounting device according to scope 1 or 2. (4) The support means is an annular part (A) made of an elastic material attached to the peripheral edge of the actuating member and extending along the peripheral edge, and the outer peripheral edge of the annular member is in contact with the partition member. By being sealed, an intermediate chamber surrounded by the actuation member, the annular member, and the partition member is formed in the equilibrium chamber, and a through hole communicating the intermediate chamber and the equilibrium chamber is formed in the equilibrium chamber. A mounting device according to claim 1 or 2, which is formed on a member. (5) the third liquid chamber is communicated with the intermediate chamber;
5. The mounting device according to claim 3, further communicating with said equilibrium chamber via said intermediate chamber. (6) The first and second orifices are respectively provided separately in the partition member, and the second orifice is only opened and closed by the operation of the actuating member. The mounting device according to any one of items 1 to 5. (7) While the partition member has a communicating path corresponding to the second orifice, the entrance portion of the communicating path is narrowed by contact with the actuating member to form the first orifice. A mounting device according to any one of claims 1 to 5. (8) The mounting according to any one of claims 2 to 7, wherein a cushioning material layer of a predetermined thickness is formed on at least one of the facing surfaces of the core member and the operating member. Device.