JP2918452B2 - Fluid-filled mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid-filled mounting device in which a predetermined vibration-proof effect is obtained by utilizing the flow action of a sealed fluid caused to flow through an orifice passage. The present invention relates to a fluid-filled mounting device capable of switching vibration isolation characteristics by adjusting a valve.

[0002]

2. Description of the Related Art Conventionally, as a type of a vibration-proof connecting member or a vibration-proof supporting member which is interposed between members constituting a vibration transmission system and suppresses transmission of vibration, it is disclosed in Japanese Patent Application Laid-Open No. Sho 60-104824. As described above, the first mounting bracket attached to one member to be vibration-isolated and connected to the second mounting bracket having a cylindrical peripheral wall attached to the other member to be vibration-isolated and connected. It is arranged on one opening side, the first mounting bracket and the second mounting bracket are connected by a main body rubber, and one side in the axial direction of the second mounting bracket is fluid-tightly closed by the main body rubber. On the other hand, the other side in the axial direction of the second mounting bracket is fluid-tightly closed with a flexible film, and a partition member is provided between the main rubber and the flexible film, thereby providing the second mounting member with a flexible member. Part of the wall is made of rubber body on both sides of the partition member A pressure receiving chamber in which internal pressure fluctuations are generated at the time of vibration input, and an equilibrium chamber in which a part of a wall portion is constituted by the flexible membrane and has a variable volume. A fluid-filled mounting device is known which has a structure in which a predetermined incompressible fluid is filled in each of the pressure receiving chambers and an orifice passage for communicating the pressure receiving chamber and the equilibrium chamber with each other. In such a fluid-filled mounting device, a vibration damping effect, which is difficult to obtain only with the rubber elastic body, can be easily obtained based on the resonance action of the fluid flowing through the orifice passage. It is suitably used as an engine mount for automobiles and the like.

[0003] In a mounting device such as an engine mount, a plurality of types of vibrations having different frequencies and amplitudes are generally input, and an anti-vibration effect is required for each of these vibrations. The frequency range in which the vibration damping effect based on the resonance action is effectively exhibited is narrow, and it is often difficult to sufficiently achieve the required vibration damping characteristics with a single orifice passage. Accordingly, Japanese Utility Model Laid-Open No. 4-1222841 and the like disclose a first orifice passage, a second orifice passage tuned to a higher frequency range than the first orifice passage, and a second orifice passage. Further, a third orifice passage tuned to a high frequency range is formed, and a rubber film that allows a predetermined amount of fluid to flow based on deformation is disposed in the third orifice passage. While restricting the amount of fluid flowing through the orifice passage of the rotary valve, the rotary valve is supported by a partition member so as to be rotatable around one axis substantially perpendicular to the axis of the second mounting bracket, and the valve of the rotary valve A second orifice passage and a third orifice passage are respectively opened on the slide surface, and these second orifices are turned by rotating the rotary valve. By selectively closing or blocking the orifice passage and the third orifice passage and selectively communicating one of the three orifice passages, the three orifice passages are selectively operated to switch the vibration isolation characteristics. An engine mount is disclosed.

In such an engine mount, the rotary shaft of the rotary valve projects through the partition member and the second mounting bracket so as to protrude outward from the mount in order to exert a rotational driving force on the rotary valve. The rotational driving force of the drive actuator is applied to the projecting tip of the rotating shaft. In general, a drive actuator has a simple structure,
Moreover, in the internal combustion engine, a linear actuator that generates a reciprocating driving force, such as a pneumatic diaphragm actuator, is preferably used because a pneumatic pressure source can be easily secured.

However, in order to rotationally drive the rotary valve by the linear type actuator, it is necessary to connect the output shaft of the actuator and the rotary shaft of the rotary valve via a link member for converting a reciprocating motion into a rotary motion. Yes, a link member must be attached to the rotary shaft of the rotary valve protruding outside the mount, and the output shaft of the actuator must be connected to the tip of the link member. In addition, it is inevitable that the rotary shaft of the rotary valve, the link member, and the output shaft of the actuator protrude greatly from the mount, and the swing area of the link member must be ensured. There was a problem that the installation space was required.

[0006]

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a rotary valve for adjusting a communication state by an orifice passage, a linear type actuator. It is an object of the present invention to provide a fluid-filled mounting device which is compact and has a small number of parts, which can be advantageously driven by the above method.

[0007]

In order to solve the problem, the present invention is characterized in that a first mounting bracket attached to one member connected in vibration isolation and a mounting bracket attached to the other member connected in vibration isolation. A second mounting bracket having a cylindrical peripheral wall is connected by a main body rubber, and one side of a cylindrical wall portion of the second mounting bracket is fluid-tightly closed by the main body rubber. The other side of the cylindrical wall portion of the second mounting member is fluid-tightly closed with a flexible film, and a partition member is disposed between the main rubber and the flexible film to sandwich the partition member. A pressure receiving chamber in which a predetermined incompressible fluid is sealed, a part of the wall is made of the main body rubber, and an internal pressure fluctuation is generated at the time of vibration input; An equilibrium chamber constituted by a flexible membrane and having a variable volume, At least one orifice passage communicating the pressure receiving chamber and the equilibrium chamber with each other is formed, and the rotary member is rotatably supported by the partition member about one axis substantially orthogonal to the axis of the second mounting bracket. At the same time, by opening at least one of the orifice passages on the valve slide surface of the rotary valve and communicating through a hollow portion inside the rotary valve, the communication state of the orifice passage by the rotary valve is reduced. In a fluid-filled mounting device adapted to be adjusted, a driving rod for exerting a driving force on the rotary valve is disposed so as to extend through the flexible membrane and into the equilibrium chamber, and has an inner tip thereof. It is inserted into the hollow portion of the rotary valve and locked at a position eccentric from the rotation center axis of the rotary valve. And by, exerts a reciprocating driving force of the rod axis direction outward tip portion of a drive rod lies in the so as to rotate the said rotary valve.

In one preferred embodiment of the present invention, the orifice passage includes a first orifice passage, a second orifice passage tuned to a higher frequency band than the first orifice passage, and While forming a third orifice passage tuned to a higher frequency range than the second orifice passage, respectively,
The third orifice passage is provided with a flow amount restricting member that is disposed so as to be displaceable or deformable by a predetermined amount and that allows a predetermined amount of fluid to flow based on the displacement or deformation. The third orifice passage is opened on the valve slide surface of the rotary valve, and the second orifice passage and the third orifice passage are selectively communicated with each other through a hollow portion of the rotary valve. A configuration may be employed.

Further, in another preferred aspect of the present invention, the rotary valve is provided at (a) both ends in the axial direction, is fitted to the partition member, and is supported rotatably around the axis. (B) extending in the axial direction with a predetermined circumferential width across the pair of cylindrical support cylinders, and connecting the pair of support cylinders to form a pair of the cylindrical support cylinders; The lightening portion is formed between the support cylinder portions, and the orifice passage is opened on the valve slide surface by being slid on a valve slide surface of the partition member by a rotation operation about an axis. An opening / closing part for adjusting the communication state; and (c) a hollow part in the supporting cylinder part and a lightening part in the opening / closing part, which are formed integrally with one of the support cylinder part and the opening / closing part. Is located A locking piece portion inward tip portion of the drive rod enters the recessed portions are engaged may be comprise formed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

First, FIGS. 1 and 2 show an engine mount for an automobile as an embodiment of the present invention.
The engine mount includes a first mounting bracket 1 mounted on one of the power unit side and the body side.
0 and a second mounting member 12 attached to one of them are elastically connected by a main body rubber 14, and are interposed between the power unit and the body, and the power unit is It is designed to support the body against vibration. At the time of mounting, when the power unit load is applied and the main rubber 14 is elastically deformed, the first mounting bracket 10 and the second mounting bracket 12 are relatively displaced by a predetermined amount in a direction approaching each other. Will be done.

More specifically, the first mounting member 10 has a generally inverted truncated conical shape as a whole. A mounting bolt 16 penetrates in the axial direction and protrudes outward and is fixed to a central portion of the first mounting bracket 10. The first mounting bracket 10 is fixed to the power unit by the mounting bolt 16. And the body side.

On the other hand, the second mounting member 12 includes an upper cylindrical member 18 and a lower cylindrical member 20 each having a cylindrical shape. The upper cylindrical member 18 has a mounting plate portion 22 that extends outward in the direction perpendicular to the axis at one opening peripheral edge of the axial direction, and a caulking metal 24 is welded to the inner peripheral edge of the lower surface of the mounting plate portion 22. ing. In addition, the lower cylindrical fitting 20 is provided with an outward step 26 on one side in the axial direction, and an inward step 28 on the other side in the axial direction. The portions are a large diameter portion 30 and a small diameter portion 32 over a predetermined length. And
The large-diameter portion 30 of the lower cylindrical member 20 is fixed by caulking by the caulking member 24 of the upper cylindrical member 18, so that the upper cylindrical member 18 and the lower cylindrical member 20 are overlapped and connected in the axial direction. Thereby, the second mounting member 12 having a cylindrical shape as a whole is configured.

The mounting plate 22 of the upper cylindrical fitting 18 has
The reinforcing plate metal fittings 34 are overlapped, and the bolt insertion holes 3 provided in the mounting plate portion 22 and the reinforcing plate metal fittings 34 are provided.
6, the second mounting bracket 12 is provided.
Can be attached to either the power unit side or the body side.

The first mounting member 10 is disposed at a predetermined distance from the opening of the upper cylindrical member 18 in the second mounting member 12, and the first mounting member 1
A main rubber 14 is interposed between the first mounting bracket 12 and the second mounting bracket 12. The main body rubber 14 has a thick, substantially tapered cylindrical shape, and the outer peripheral surface of the large-diameter end portion has the second mounting bracket 1.
In 2, the inner peripheral surface of the opening of the upper cylindrical fitting 18 and the inner peripheral surface of the small-diameter end portion are vulcanized and bonded to the outer peripheral surface of the first mounting fitting 10, respectively. In addition, thereby, the opening of the second mounting member 12 on the side of the upper cylindrical member 18 is covered and closed in a fluid-tight manner. An annular or cylindrical inter-ring 38 is provided at an axially intermediate portion of the main rubber 14 to adjust the spring characteristics.

A partition member 4 having a substantially circular block shape or a thick disk shape is provided inside the second mounting member 12.
0 and a disc-shaped sheet metal member 41 are accommodated and arranged so as to be overlapped with each other in the axial direction.
A diaphragm 42 as a flexible film made of a substantially disk-shaped thin rubber is provided in the opening on the side of the lower cylindrical fitting 20. Then, the partition member 40 is provided between the stepped portion 26 of the lower cylindrical fitting 20 and the caulking fitting 24 together with the sheet metal fitting 41 at the outward flange portion 44 formed at one axial end (upper end in the drawing). The diaphragm 42 is sandwiched and fixed to the second mounting member 12, and the diaphragm 42 is provided at the outer peripheral edge thereof with the step 28 of the lower cylindrical member 20 and the partition member 4.
0, and the second mounting bracket 12
The opening on the side of the lower cylinder fitting 20 is covered by the diaphragm 42 and is closed in a fluid-tight manner.

As a result, both axial openings of the second mounting member 12 are closed in a fluid-tight manner by the main rubber 14 and the diaphragm 42, and the main rubber 14 and the diaphragm 4 are closed.
The pressure receiving chamber 46 and the equilibrium chamber 48 in which a predetermined incompressible fluid is sealed are formed between the main rubber 14 and the diaphragm 42 by the partition member 40 between the two. In addition, as the fluid to be filled in the pressure receiving chamber 46 and the equilibrium chamber 48, water, alkylene glycol, polyalkylene glycol, silicone oil, or the like is used so that the vibration damping effect based on the resonance action of the fluid is effectively exhibited.
A low-viscosity fluid having a viscosity of 0.1 Pa · s or less is suitably used. Further, the fluid is injected and filled into the pressure receiving chamber 46 and the equilibrium chamber 48 by, for example, the diaphragm 42.
After injecting through the inner hole of the annular plate 50 vulcanized and bonded to the inner wall, the inner hole may be sealed with a blind rivet 52 or the like.

An umbrella bracket 54 having a substantially umbrella shape or a hat shape is disposed inside the pressure receiving chamber 46, and its upper bottom is fixed to the first mounting bracket 10 by a mounting bolt 16
Bolted to the head. When the mount is mounted, between the outer peripheral surface of the umbrella bracket 54 and the inner surface of the pressure receiving chamber 46, an annular constricted flow path in which fluid flow is generated based on displacement of the umbrella bracket 54 at the time of vibration input is formed. Based on the resonance effect of the fluid flowing through the constricted flow path, a low dynamic spring effect is exhibited when a vibration is input in a particularly high frequency range such as a medium to high-speed muffled sound. I have.

Further, the partition member 40 for partitioning the pressure receiving chamber 46 and the equilibrium chamber 48 is provided with a valve mounting hole 58 having a circular cross section extending through the inside thereof in the direction perpendicular to the axis. A first orifice passage 62, a second orifice passage 64, and a third orifice passage 66, which each have a rotary valve 60 rotatably mounted around a central axis and which mutually communicate the pressure receiving chamber 46 and the balancing chamber 48. Are formed through the inside of the partition member 40. The openings on the equilibrium chamber 48 side in the second orifice passage 64 and the third orifice passage 66 are:
Each is opened on the valve slide surface of the valve mounting hole 58, and by rotating the rotary valve 60,
One of the second orifice passage 64 and the third orifice passage 66 is alternatively closed, and the other is communicated.

Specifically, as shown in FIGS. 3 to 7, inside the partition member 40, a circular recess 68 opening at the center of the upper surface and a bottom portion of the recess 68 are provided. A through hole 70 provided to allow the recess 68 to communicate with the valve mounting hole 58;
70 and approximately 2 in the circumferential direction around the recess 68 opening to the upper surface.
A circumferential groove 72 extending at a length of / 3 circumference, an arc-shaped opening hole 74 opening at a portion where the circumferential groove 72 is not provided, and a bottom portion of the opening hole 74 extending in a direction perpendicular to the axis to be a valve mounting hole 58. , A through hole 78 provided in one end of the circumferential groove 72 in the circumferential direction so as to penetrate in the axial direction, and a through hole 78 provided at a predetermined depth in the other end of the circumferential groove 72 in the circumferential direction. An axial hole 80 and a connection hole 82 extending substantially parallel to the valve mounting hole 58 and communicating the bottom of the axial hole 80 with the communication hole 76 are formed respectively. As shown in FIG. 8, the sheet metal fitting 41 superimposed on the upper surface of the partition member 40 is provided at a position corresponding to the recess 68 of the partition member 40.
One central hole 84 is formed, and
A through hole 86 is formed at a position corresponding to the opening hole 74. In addition, four positioning pins 88 projecting upward from the outer peripheral edge of the partition member 40, and insertion holes 90 are provided at corresponding positions of the sheet metal fitting 41, and the positioning holes 88 are provided. By inserting the pin 88 into the insertion hole 90, the partition member 40 and the metal plate 41 are aligned with each other.

Further, as shown in FIGS. 1 and 2, the recess 68 of the partition member 40 has a substantially disc-like shape in which a thick annular mounting portion 92 is integrally provided on the outer peripheral edge. A movable rubber film 94 as a flow-rate limiting member is accommodated and disposed, and the mounting portion 92 is divided into a partition member 40 and a sheet metal member 41.
The central portion is assembled in such a manner that elastic deformation of the central portion is allowed by being sandwiched between them.

That is, in the partition member 40 as described above, the peripheral groove 72 is covered with the metal plate 41 so that
A first orifice passage 62 that communicates the pressure receiving chamber 46 and the balance chamber 48 with each other through the communication hole 76 and the opening hole 74 by the peripheral groove 72, the through hole 78, the axial hole 80, and the connection hole 82. The opening orifice 74 and the communication hole 76 cooperate with each other to form a second orifice passage 64 for communicating the pressure receiving chamber 46 and the balance chamber 48 with each other. The third orifice passage 66 which connects the pressure receiving chamber 46 and the balancing chamber 48 to each other is formed in cooperation with the location 68, the through hole 70, and the central hole 84 of the sheet metal fitting 41. Then, the first orifice passage 62
Is based on the resonance effect of the fluid flowing through
The length and the cross-sectional area are set so that a high damping effect against low-frequency vibration such as a shake is exerted, while the second orifice passage 64 is idling based on the resonance action of the fluid flowing through the inside. The length and the cross-sectional area are set so that a low dynamic spring effect against medium frequency vibration such as vibration is exhibited.
The length 6 and the cross-sectional area 6 are set so that a low dynamic spring effect against high-frequency vibration such as a low-speed muffled sound is exhibited based on a resonance action of a fluid flowing through the inside. Further, in the third orifice passage 66, the fluid flow is allowed along with the elastic deformation of the movable rubber film 94, and the amount of fluid flow is restricted by the elastic force of the movable rubber film 94. Has become.

Further, the openings of the second orifice passage 64 and the third orifice passage 66 on the equilibrium chamber 48 side are opened on the side surface and the upper surface of the valve slide surface of the valve mounting hole 58, respectively. Is selectively communicated with the equilibrium chamber 48 through the inside. Specifically, as shown in FIGS. 9 to 11, the rotary valve 60 includes a pair of cylindrical support tubular portions 96 provided at both ends in the axial direction.
The support cylinder portions 96, 96 are formed in the axial direction with a width of approximately 1/4 circumference in the circumferential direction so as to extend between them.
And an arcuate plate-shaped opening / closing portion 98 for connecting the two. In other words, such a rotary valve 60 has a cylindrical shape as a whole, and is cut off at a predetermined width in the circumferential direction at a central portion in the axial direction so as to open the internal space to the outer peripheral surface. The lightening portion 100 is formed on the outer peripheral surface. Also,
At the axially intermediate portion of the opening / closing portion 98, a disk-shaped locking piece 102 protruding into the lightening portion 100 is integrally formed, and the rotary valve 60 in the locking piece 102 is formed. A lock hole 104 is provided at a position eccentric by a predetermined amount from the rotation center axis of the lock pin 104, and a lock pin 105 (see FIGS. 1 and 2) is fixed to the lock hole 104. The locking piece 102 is connected to one of the support cylinders 9.
6 are connected to each other by a connection reinforcing portion 106. Furthermore, one of the support cylinder portions 96 has 1 /
A positioning protrusion 108 having a width of less than three turns and projecting outward in the axial direction is formed.

As shown in FIGS. 3 to 7, the valve mounting hole 58 of the partition member 40 in which the rotary valve 60 is incorporated has an axially central portion opened downward through an opening window 110, An abutting projection 112 which is communicated with the equilibrium chamber 48 and protrudes inward in the radial direction is provided on the inner peripheral surface at one end in the axial direction with a length of approximately 1/2 circumference in the circumferential direction. Have been. As shown in FIGS. 1 and 2, the circumferential end surfaces of the positioning projections 108 of the rotary valve 60 abut on the abutting protrusions 112, so that the rotating ends of the rotary valve 60 on both sides in the circumferential direction are provided. The opening of the third orifice passage 66 is closed by the opening / closing portion 98 at one of the rotation end positions, and the opening of the second orifice passage 64 is lightened. 100 and the opening window 110 communicate with the equilibrium chamber 48, and at the other rotation end position, the opening of the second orifice passage 64 is opened / closed 98
Thus, the opening of the third orifice passage 66 is communicated with the balance chamber 48 through the lightening portion 100 and the opening window 110. A C-shaped snap ring 114 is fitted to an axial end of the valve mounting hole 58 opposite to the side where the contact protrusion 112 is formed.
The rotary valve 60 is positioned in the axial direction.

Then, as described above, the second orifice passage 64 and the third orifice passage 66 are connected to the rotary valve 60.
When the low-frequency vibration is input, the second orifice passage 64 is shut off, and a high damping effect based on the resonance action of the fluid flowing through the first orifice passage 62 is obtained. When inputting medium frequency vibration,
The third orifice passage 66 is shut off to obtain a low dynamic spring effect based on the resonance action of the fluid flowing through the second orifice passage 64. Further, when high frequency vibration is input, the second orifice passage 64 is shut off. A low dynamic spring effect based on the resonance action of the fluid flowing through the third orifice passage 66 can be obtained, whereby various vibrations over a wide frequency range can be obtained by appropriately switching the mount anti-vibration characteristics. In any case, it is possible to obtain a good anti-vibration effect. Incidentally, when the second orifice passage 64 is shut off at the time of inputting low-frequency vibration,
Although the third orifice passage 66 is in communication, the amplitude of the low-frequency vibration is sufficiently larger than that of the high-frequency vibration, so that the amount of fluid flowing through the third orifice passage 66 is limited by the movable rubber film 94. As a result, the flow of the fluid through the first orifice passage 62 is effectively generated, and when the second orifice passage is communicated when the intermediate frequency vibration is input, the first orifice passage The passage 62 is also in communication with the first orifice passage 6.
2 has a sufficiently large fluid flow resistance than the second orifice passage 64, so that the fluid flows through the second orifice passage 64 effectively.

Here, a driving rod 116 is locked to the rotary valve 60, and a rotational driving force is exerted through the driving rod 116. Specifically, the drive rod 116 has a substantially straight rod shape, and is disposed so as to protrude into the equilibrium chamber 48 through the center portion of the diaphragm 42,
The inward end portion is inserted into the lightening portion 100 of the rotary valve 60 through the opening window 110 of the partition member 40, and protrudes from the engaging piece portion 102 with respect to the protruding end portion. The inserted locking pin 105 is inserted, and the protruding distal end is locked at a position in the locking piece 102 eccentric by a predetermined amount from the rotation center axis of the rotary valve 60. The outer end of the drive rod 116 is formed as an inverted cup-shaped coupling portion 118, and the diaphragm 42 is vulcanized and bonded to the outer peripheral surface of the coupling portion 118, thereby forming the coupling portion 118. A driving rod 116 penetrates the diaphragm 42 in a fluid-tight manner and is disposed so as to protrude outward.

Further, below the diaphragm 42 from which the drive rod 116 is projected, the drive rod 1
An actuator 120 that exerts a driving force on the actuator 16 is provided. Such an actuator 120 is a known pneumatic diaphragm type actuator, and as shown in FIG.
24, and plates 126, 126 mounted on both sides of the central portion of the rubber film 124 from both sides.
The output rod 128 is fixed to the
Is disposed so as to protrude upward from the housing 122 through one chamber partitioned by the rubber film 124, while a coil spring 130 is housed and disposed in the other chamber partitioned by the rubber film 124, Plate 126, 1
26, an urging force is applied to the output rod 128 in the projecting direction (upward in the figure), and the other chamber is connected to the pneumatic passage 132.
32, the output rod 1
28 is operated in the retracting direction (downward in the figure) against the urging force of the coil spring 130.

The actuator 120 is
At the opening of the lower cylindrical fitting 20, it is supported by a support fitting 134 which is disposed and fixed in a radial direction over the radial direction, and is fixedly attached to the second mounting fitting 12,
The distal end of the output rod 128 extends inward of the lower cylinder fitting 20, and the coupling portion 11 of the drive rod 116
8 and fixedly connected. As a result, when no negative pressure is applied to the actuator 120, as shown in FIGS.
The second orifice passage 64 is shut off and the third orifice passage 66 is communicated while the rotary valve 60 is positioned at one of the rotation ends with the second orifice 16 protruding into the equilibrium chamber 48. When a negative pressure is applied to the actuator 120, the drive rod 116 is driven in a direction of being pulled out (downward in the figure) from the equilibrium chamber 48, so that the rotary valve 60 rotates around the central axis (FIG. 1). The second orifice passage 64 is opened and the third orifice passage 66 is shut off.

That is, by controlling the connection / disconnection of the connection of the negative pressure source to the actuator 120, the rotary valve 60 is rotated and the second orifice passage 64 is rotated.
And the third orifice passage 66 can be selectively communicated / blocked, whereby the mount anti-vibration characteristics can be appropriately switched.

Therefore, in the engine mount having the above-described structure, the driving rod 116 which is reciprocally driven is used.
Is directly connected to the rotary valve 60, and the connecting portion of the drive rod 116 to the rotary valve 60 is eccentrically positioned by a predetermined amount from the rotation center axis of the rotary valve 60, and the drive rod 116 reciprocates. Since the driving force is directly applied to the rotary valve 60 as a rotational force, the driving rod 11
There is no need to separately prepare a link member or the like for converting the reciprocating motion of 6 into a rotary motion, so that the number of components can be reduced and the structure can be advantageously simplified.

Moreover, since the driving rod 116 is inserted into the balancing chamber 48 and further inserted into the lightening portion 100 of the rotary valve 60, the lightening portion 100 functioning as a fluid communication passage is provided. The driving rod 116 can be effectively used as a space for disposing the driving rod 116.
The amount of protrusion of the mount outside the mount can be minimized, and the operating area of the drive rod 116 only needs to secure a space to allow a slight reciprocation. The space can be advantageously reduced.

Further, since the amount of protrusion of the drive rod 116 to the outside of the mount is minimized, damage to the drive rod 116 at the time of manufacture, transportation, assembly, etc. of the mount can be advantageously prevented. obtain.

Furthermore, in the engine mount as described above, the actuator 120 for driving the drive rod 116 can be positioned and mounted on substantially the same axis as the mount, so that the actuator 120 can be easily mounted. There is also an advantage that it is easy to secure a space for disposing the engine mount including the actuator 120.

Further, the drive rod 116 is disposed through the diaphragm 42 and is vulcanized and bonded to the diaphragm 42 in a fluid-tight manner. The density and its durability are not impaired or reduced.

Further, in this embodiment, the support cylindrical portions 96 and 9 are provided at both ends in the axial direction while having a hollow cylindrical shape as a whole.
The adoption of the rotary valve 60 provided with 6 makes it possible to advantageously reduce the weight of the entire mount, and advantageously secure the support stability of the rotary valve 60 by the partition member 40.

Although the embodiment of the present invention has been described in detail, this is a literal example, and the present invention is not construed as being limited to such a specific example.

For example, the specific shapes of the first, second, and third orifice passages are not limited to those of the above-described embodiment, and the vibration isolating characteristics required for the mounting device and the structure of the mounting device are not limited. It is appropriately changed according to the size and the size.

Further, as shown in the example, the flow amount restricting member disposed in the third orifice passage is provided so as to be displaceable by a predetermined distance, in addition to the movable rubber film 94 which permits fluid flow based on elastic deformation. Then, it is also possible to adopt a movable plate structure or the like that allows fluid flow based on the displacement.

Further, the specific structure of the rotary valve is not limited to that of the above-described embodiment, but may be determined according to the position and size of the opening of the second orifice passage or the third orifice passage. It is appropriately changed, for example, while providing an opening and closing portion for opening and closing the second orifice passage and the third orifice passage on both sides in the axial direction,
It is also possible to provide a support cylinder part fitted and supported by the partition member at the center part in the axial direction.

Further, the drive rod 116 and the actuator 120 do not necessarily need to be disposed on the center axis of the mounting apparatus, and may be deviated from the center axis of the mounting apparatus in accordance with the structure of the mounting apparatus and the installation space. You may arrange.

As the actuator that exerts a reciprocating driving force on the driving rod 116, various well-known actuators such as a solenoid type actuator and an electromagnetic type actuator are used in addition to the pneumatic diaphragm type actuator as exemplified. obtain.

Further, in the above-described embodiment, two orifice passages of the three orifice passages are opened to the valve slide surface so that they can be selectively communicated with each other. Although one specific example to which the present invention is applied is shown, the present invention further includes a single orifice passage opening to the valve slide surface and two orifice passages, one of which is provided on the valve slide surface. A mount that is opened and has a structure in which one orifice passage is communicated / blocked by a rotary valve, and the opening area (flow passage cross-sectional area) and flow passage length of the orifice passage are changed. The present invention is similarly applicable to devices and the like.

In addition, in the above-described embodiment, a specific example in which the present invention is applied to an engine mount for an automobile is shown. However, the present invention is also applicable to a body mount, a member mount, and various types of mounting devices other than an automobile. Needless to say, the present invention is also applicable.

In addition, although not enumerated one by one, the present invention can be embodied in modes in which various changes, modifications, improvements, and the like are made based on the knowledge of those skilled in the art. It goes without saying that all of them are included in the scope of the present invention unless departing from the spirit of the present invention.

[0045]

As is apparent from the above description, in the fluid-filled mounting device having the structure according to the present invention, the drive rod is directly connected to a position eccentric by a predetermined amount from the rotation center axis of the rotary valve. As a result, the reciprocating drive force of the drive rod is directly applied to the rotary valve as a rotational force, so that a special link member or the like for converting the reciprocating motion of the drive rod into a rotational motion is provided. Is unnecessary, the number of parts can be reduced, and the structure can be advantageously simplified.

Further, such a drive rod is inserted and arranged in the hollow portion of the rotary valve, and the hollow portion functioning as a fluid communication passage is effectively used as a space for disposing the drive rod. Thus, the amount of protrusion of the mounting device to the outside of the mounting is suppressed, so that the mounting device can be made compact and the installation space thereof can be effectively reduced.

Further, according to the present invention, one orifice passage is opened to the valve slide surface, and the cross-sectional area and length of the orifice passage are changed by the rotary valve, or the orifice passage is communicated / blocked. In addition to the mounting device, two of the three orifice passages are opened to the valve slide surface, and the two orifice passages are selectively communicated by a rotary valve. Can be advantageously applied, whereby any of the above-mentioned effects such as simplification of the structure and reduction of the installation space can be advantageously achieved.

Further, in the fluid-filled mounting device having the structure according to the present invention, a support cylinder portion is provided at both ends in the axial direction, and an opening / closing portion for adjusting the communication state of the orifice passage is provided between the support cylinder portions. The rotary valve having the structure provided is suitably adopted, whereby the weight of the mounting device can be reduced and the operation stability of the rotary valve can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an automobile engine mount as one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a plan view showing a partition member used for the engine mount shown in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a sectional view taken along line VV in FIG. 3;

6 is a view taken in the direction of arrows VI-VI in FIG. 3;

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 3;

FIG. 8 is a plan view showing a metal plate used for the engine mount shown in FIG. 1;

FIG. 9 is a front view showing a rotary valve used in the engine mount shown in FIG. 1;

FIG. 10 is a sectional view taken along line XX in FIG. 9;

FIG. 11 is a view as viewed in the direction of arrows XI-XI in FIG. 9;

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 first mounting bracket 12 second mounting bracket 14 main body rubber 40 partition member 41 sheet metal fitting 42 diaphragm 46 pressure receiving chamber 48 balance chamber 58 valve mounting hole 60 rotary valve 62 first orifice passage 64 second orifice passage 66 first Three orifice passages 94 Movable rubber film 96 Support cylinder part 98 Opening / closing part 100 Lightening part 102 Locking piece 105 Locking pin 116 Drive rod 120 Actuator

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuya Suzuki 3600 Gezu, Kita-gaiyama, Komaki-shi, Aichi Prefecture Tokai Rubber Industries Co., Ltd. (56) References JP-A-6-129480 (JP, A) JP-A-3-89043 (JP, A) JP-A-60-104824 (JP, A) JP-A-5-40638 (JP, U) JP-A-4-1222841 (JP, U) (58) Fields investigated (Int) .Cl. ⁶ , DB name) F16F 13/00

Claims (3)

(57) [Claims] A first mounting bracket having a cylindrical peripheral wall mounted on a first member attached to one member connected to the vibration-proof connection and a second member connected to the other member connected to the vibration-proof connection by a main body rubber. One side of the cylindrical wall portion of the second mounting member is fluid-tightly closed by the body rubber while being connected, and the other side of the cylindrical wall portion of the second mounting member is covered with a flexible film. While closing fluid-tightly, a partition member is arranged between the main body rubber and the flexible membrane, and on both sides of the partition member,
A pressure receiving chamber in which a predetermined incompressible fluid is sealed, a part of the wall is formed of the main rubber, and an internal pressure fluctuation is generated at the time of vibration input, and a part of the wall is formed by the flexible membrane. The pressure chamber and the equilibrium chamber having a variable volume are defined, and at least one orifice passage communicating the pressure receiving chamber and the equilibrium chamber with each other is formed. While being rotatably supported about one axis substantially orthogonal to the axis of the mounting bracket, at least one of the orifice passages is opened on the valve slide surface of the rotary valve, and through the hollow portion inside the rotary valve. The fluid-filled mounting device, wherein the communication state of the orifice passage is adjusted by the rotary valve by allowing the rotor valve to communicate with the rotor. A driving rod for applying a driving force to the re-valve is provided so as to extend through the flexible membrane and extend into the equilibrium chamber, and an inner end thereof is inserted into a hollow portion of the rotary valve, thereby forming the rotary valve. By locking the valve at a position eccentric from the rotation center axis of the valve, a reciprocating driving force in the axial direction of the rod is exerted on the outer distal end of the driving rod to rotate the rotary valve. Fluid-filled mounting device. 2. As the orifice passage, a first orifice passage, a second orifice passage tuned to a higher frequency range than the first orifice passage, and a higher frequency than the second orifice passage. A third orifice passage tuned to the region, and a flow amount restricting member that is disposed so as to be displaceable or deformable by a predetermined amount and allows a flow of a predetermined amount of fluid based on the displacement or deformation. In the third orifice passage,
The second orifice passage and the third orifice passage are opened on the valve slide surface of the rotary valve, and the second orifice passage and the third orifice passage are selected through a hollow portion of the rotary valve. The fluid-filled mounting device according to claim 1, wherein the fluid-filled mounting device is configured to be in communication with each other. 3. A pair of cylindrical support cylinder portions provided at both ends in the axial direction, fitted to the partition member and supported so as to be rotatable around an axis, and a pair of the support valves. Extending in the axial direction with a predetermined width in the circumferential direction across the cylinders, connecting the pair of support cylinders to form the hollow portion between the pair of support cylinders, and An opening / closing unit that is slid on a valve slide surface of the partition member by the rotation operation of the partition member to adjust a communication state of the orifice passage opened on the valve slide surface; and the support cylinder unit and the open / close unit. , And is positioned at one of the hollow portion of the support cylinder portion and the lightening portion of the opening / closing portion, and the inner tip of the drive rod that enters the lightening portion is engaged. Locking piece to be stopped The fluid-filled mounting device according to claim 1, wherein the mounting device includes: