JP2009185889A - Liquid-sealed vibration control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid-sealed vibration control device having simplified construction for selectively changing over a plurality of orifices. <P>SOLUTION: The liquid-sealed vibration control device comprises a change-over means 50 for changing over a communicated condition between a main liquid chamber 11A and a sub liquid chamber 11B. The change-over means 50 has a rotor 51 and an actuator device 60, and the rotor 51 has a connection flow path 52a. With the rotation of the rotor 51, the first orifice 21 is changed over between the communicated condition and a shut-off condition. The rotor 51 is inserted into a bottomed storage hole portion 45 formed sideways in a partition body 20 at its side corresponding to the side of the actuator device 60 so that an axial front end S of the rotor 51 is fitted to a fitting recessed portion 71 formed in the bottom of the storage hole portion 45 of the partition body 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid-filled vibration isolator, and more particularly to a liquid-filled vibration isolator capable of simplifying the structure while selectively switching a plurality of orifices.

  As a liquid-filled type vibration isolator, a liquid-filled chamber is divided into a main liquid chamber and a sub-liquid chamber, and the main liquid chamber and the sub-liquid chamber are connected to each other through an orifice. This type of liquid-filled vibration isolator is, for example, provided between an automobile engine and a vehicle body frame, and attenuates engine vibration by a fluid flow effect of liquid flowing between both liquid chambers via an orifice. To prevent transmission to the body frame.

In recent years, it has been proposed to provide a plurality of (for example, two) orifices having different cross-sectional areas and to selectively switch the orifices communicating with both liquid chambers by rotating the rotary valve with an actuator device. . According to this liquid-filled vibration isolator, vibrations in different frequency bands can be applied to each orifice by switching the orifices, so that vibrations can be reduced in a wide frequency band (Patent Document 1). ).
Japanese Patent Laid-Open No. 11-22778

  However, in the above-described conventional liquid-filled vibration isolator, the orifice is formed by a complicated path and a plurality of elastic films are arranged, so that the structure of the entire partition is complicated. There was a problem. For this reason, when the partition body is assembled in the liquid, air is likely to remain in the structure, and a process such as evacuation is separately required, resulting in an increase in manufacturing cost.

  The present invention has been made to solve the above-described problems, and provides a liquid-filled vibration isolator capable of simplifying the structure while selectively switching a plurality of orifices. It is an object.

In order to achieve this object, a liquid-filled vibration isolator according to claim 1 is:
A first fixture, a cylindrical second fixture, a vibration isolating base that connects the second fixture and the first fixture and is made of a rubber-like elastic body, and the second fixture. A diaphragm which is attached and forms a liquid enclosure chamber between the vibration isolating substrate, a partition body which partitions the liquid enclosure chamber into a main liquid chamber on the vibration isolating substrate side and a sub liquid chamber on the diaphragm side; A liquid comprising a first orifice and a second orifice that are formed in the partition and communicate with each other between the main liquid chamber and the sub liquid chamber, and switching means for switching the communication state between the main liquid chamber and the sub liquid chamber. In the enclosed vibration isolator,
The first orifice and the second orifice are formed in parallel to the partition as flow paths independent of each other,
The partition body includes a main body configured in a columnar shape, and a plate-like lid plate that is covered with an upper surface of the main body,
The first orifice includes a first groove channel formed by covering the lid plate with a first groove formed in a groove shape on the upper surface of the main body, and the first groove. A first linear flow path formed in a straight line through the main body portion toward the lower surface and communicated with the flow path;
The second orifice includes a second groove channel formed by covering the lid plate portion with a second groove formed in a groove shape on the upper surface of the main body, and the second groove. A second linear flow path formed in a straight line through the main body portion toward the lower surface and communicated with the flow path;
The partition includes a switching chamber interposed in the flow path of the first straight flow path in the first orifice,
The switching means includes a columnar rotor that is rotatably accommodated in the switching chamber, and an actuator device that applies a rotational driving force to the rotor, and the rotor moves the rotor from one peripheral side to the other. A connecting flow path formed linearly toward the peripheral side surface of
The rotation of the rotor causes the first linear flow channel to communicate with each other via the connection flow channel of the rotor, and the peripheral surface of the rotor blocks the first linear flow channel, thereby communicating the first orifice. And is configured to switch to a blocking state,
Opened on the actuator device side, a horizontally-bottomed bottomed receiving hole having the switching chamber is formed in the partition body,
The rotor is inserted into the accommodation hole from the side corresponding to the actuator device side, and the axial tip portion of the rotor is fitted into a fitting recess formed at the bottom of the accommodation hole of the partition body It is characterized by being. (Claim 1)

The liquid-filled vibration isolator according to claim 2 is the liquid-filled vibration isolator according to claim 1,
The axial tip of the rotor is formed in a partial spherical shape, and the fitting recess is formed in a partial spherical shape. (Claim 2).

The liquid-filled vibration isolator according to claim 3 is the liquid-filled vibration isolator according to claim 2,
A tip portion of the rotor in the axial direction is formed in a hemispherical shape.

The liquid-filled vibration isolator according to claim 4 is the liquid-filled vibration isolator according to any one of claims 1 to 3,
The rotor and the partition are made of different materials.

  According to the liquid-filled vibration isolator according to claim 1, the first orifice and the second orifice are formed in parallel with the partition body as the mutually independent flow paths while allowing the main liquid chamber and the sub liquid chamber to communicate with each other. And a switching means for switching the communication state between the main liquid chamber and the sub liquid chamber by the first orifice and the second orifice, so that when vibration is input, the communication between the two liquid chambers according to the input. By switching the state by the switching means, vibration in different frequency bands can be applied to the first orifice and / or the second orifice, and as a result, vibration can be reduced in a wide frequency band.

  In this case, according to the present invention, the switching means rotatably accommodates the rotor in the switching chamber interposed in the flow path of the first orifice and communicates only the flow path of the first orifice by the rotation of the rotor. It is the structure switched to a state and an interruption | blocking state. In other words, unlike the conventional product in which the two flow paths of the first orifice and the second orifice are switched by one rotor, it is not necessary to use a complicated route such as crossing these two orifices. The path of the orifice and the second orifice can be simplified.

  Therefore, it is possible to simplify the structure of the entire partition body and reduce the manufacturing cost, and to improve the air bleedability, air (air) remains in each flow path during assembly in liquid. This has the effect of suppressing the dynamic characteristics and improving the reliability.

Further, according to the present invention, the first orifice includes a first groove channel and a first linear channel, and is plate-like in the first groove formed in the groove shape on the upper surface of the main body of the partition. The first groove channel is formed by covering the lid plate portion of the first groove and linearly penetrates the main body from the communicating portion with the first groove channel toward the lower surface. Therefore, when assembling in the liquid, the first concave groove channel and the first straight line are arranged by arranging the open surface side of the first concave groove (that is, the upper surface side of the main body) on the upper side. Air (air) can be reliably and easily discharged to the outside from both of the flow paths. As a result, dynamic characteristics and reliability can be improved, and air from each flow path can be improved. In order to remove air, it is not necessary to rotate the partition body (main body) in the liquid in a complicated manner. There is an advantage that can be.

  Furthermore, according to the present invention, as described above, the first groove channel is formed in a groove shape on the upper surface of the main body portion, thereby improving the air bleedability and reducing the space on the upper surface of the main body portion. Effective use (for example, extending in a circular shape or a spiral shape) can sufficiently secure the flow path length, and as a result, the dynamic characteristics can be improved.

  According to the present invention, similarly to the first orifice, the second orifice includes the second groove channel and the second straight channel, and these are the first groove channel and the first linear flow described above. Since the structure is the same as that of the road, there are effects that dynamic characteristics and reliability can be improved, and workability during air bleeding can be improved.

  Furthermore, according to the present invention, since the second groove channel is formed in a groove shape on the upper surface of the main body portion in the same manner as the first groove channel described above, while improving the air bleedability, By effectively using the space on the upper surface of the main body, there is an effect that the channel length can be sufficiently secured and the dynamic characteristics can be improved.

The rotor is inserted from a side corresponding to the actuator device into a horizontally-bottomed bottomed receiving hole formed in the partition body, and an axial tip portion of the rotor is inserted into the housing hole of the partition body. Since it fits into the fitting recess formed at the bottom of the part, the following effects can be achieved.
For example, in the structure in which the rotor is inserted into the partition body from the side opposite to the actuator device in the lateral direction, a through-hole penetrating in the lateral direction must be formed in the partition body, and the orifice is disposed avoiding the through-hole. There is a problem that the degree of freedom of design becomes low. On the other hand, according to the above configuration of the present invention, the partition body is formed with a side-bottomed receiving hole, and the outer side of the bottom of the receiving hole (opposite to the actuator device side). ), A cavity for accommodating the rotor is not formed, so that the above problems are not caused, and the degree of freedom in design can be increased.

According to the liquid filled type vibration damping device of the second aspect, in addition to the above-described operation by the configuration of the first aspect, the following operation can be achieved.
Since the front end portion in the axial direction of the rotor is formed in a partial spherical shape and the fitting concave portion is formed in a partial spherical shape, for example, the front end portion in the axial direction of the rotor is cylindrical, and the fitting concave portion has a diameter. Compared with a fitting structure with a fixed cross-sectional circular fitting hole, the contact area between the axial tip of the rotor and the fitting recess of the partition can be reduced, and the sliding area of both can be reduced. Can be reduced.
As a result, it is possible to reduce the sliding resistance between the axial end portion of the rotor and the fitting recess of the partition body, and the driving force of the actuator device can be reduced, and the actuator device can be miniaturized.

  According to the liquid-filled vibration isolator according to claim 3, in addition to the above-described operation according to the structure of claim 2, the axial tip of the rotor is formed in a hemispherical shape. It is possible to easily form the tip portion in the direction.

  According to the liquid filled type vibration damping device of the fourth aspect, the following effects can be obtained.

  In addition to the above action according to any one of the first to third aspects, it is possible to avoid the contact (collapsing) of the contact surface between the rotor and the partition.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a liquid-filled vibration isolator 100 according to an embodiment of the present invention.

  This liquid-filled vibration isolator 100 is a vibration isolator for supporting and fixing an automobile engine and reducing vibration transmitted from the engine to the vehicle body frame, and is attached to the engine side as shown in FIG. The first mounting bracket 1 to be mounted, the cylindrical second mounting bracket 2 to be mounted on the side of the vehicle body frame below the engine, and the vibration-proof base 3 that connects these and is made of a rubber-like elastic body are mainly provided. Yes.

  The first mounting bracket 1 is formed of an aluminum alloy or the like in a substantially columnar shape, and as shown in FIG. 1, a fastening hole 1a for fastening a mounting bolt on the engine side is recessed on the upper surface (upper side surface in FIG. 1). It is installed. A positioning projection 1b is provided on the side of the fastening hole 1a. Further, the lower part of the first mounting bracket 1 is formed so as to project in a flange shape in the outer diameter direction, and this projecting part is embedded in the vibration isolation base 3.

  The second mounting bracket 2 includes a cylindrical metal fitting 6 on which the vibration-proof base 3 is vulcanized and a bottom metal fitting 7 attached to the lower side of the cylindrical metal fitting 6. As shown in FIG. 1, the cylindrical metal fitting 6 is made of a steel material in a cylindrical shape having an opening that spreads upward, and the bottom metal fitting 7 is made of a steel material in a cup shape with an inclined bottom portion. In addition, the mounting bolt 5 and the positioning convex part 7a are protrudingly provided at the bottom part of the bottom metal fitting 7.

  As shown in FIG. 1, the anti-vibration base 3 is formed from a rubber-like elastic body in a substantially truncated cone shape, and is vulcanized between the lower surface side of the first mounting bracket 1 and the upper end opening of the cylindrical fitting 6. It is glued. Further, a rubber film 3a covering the inner peripheral surface of the cylindrical metal fitting 6 is connected to the lower end portion of the vibration isolating base 3, and an outer peripheral portion of a partition body 20 described later is in close contact with the rubber film 3a. .

  As shown in FIG. 1, the upper end portion (upper side in FIG. 1) of the vibration isolating base 3 is provided with a covering portion 3 b that covers the protruding portion of the first mounting bracket 1, and this covering portion 3 b is attached to the stabilizer fitting 8. By contacting, it is configured to obtain a stopper action at the time of large displacement. The stabilizer fitting 8 is caulked and fixed to the end of the cylindrical fitting 6. A cover member 13 made of a rubber-like elastic body is attached to the upper surface side of the stabilizer fitting 8.

  The diaphragm 9 is formed from a rubber-like elastic body into a rubber film shape having a partial spherical shape. As shown in FIG. 1, the diaphragm 9 is attached to the second attachment fitting 2 (between the tubular fitting 6 and the bottom fitting 7). It is attached. As a result, a liquid sealing chamber 11 is formed between the upper surface side of the diaphragm 9 and the lower surface side of the vibration isolation base 3.

  The liquid enclosure 11 is filled with an antifreeze liquid (not shown) such as ethylene glycol. As shown in FIG. 1, the liquid enclosure chamber 11 is divided into a main liquid chamber 11A on the vibration isolator base 3 side (upper side in FIG. 1) and a sub liquid chamber on the diaphragm 9 side (lower side in FIG. 1) by a partition body 20 described later. It is partitioned into two rooms with 11B.

  The diaphragm 9 is vulcanized and bonded to a donut-shaped mounting plate 10 as viewed from above, and the mounting plate 10 is caulked and fixed between the cylindrical metal fitting 6 and the bottom metal fitting 7 as shown in FIG. Thus, the second mounting bracket 2 is attached.

  As shown in FIG. 1, the partition body 20 is formed in a substantially circular plate shape from a steel material, and is formed in a cylindrical shape from a resin material, and is formed on a top surface (upper side surface in FIG. 1) by the lid plate portion 30. And a main body portion 40 that is covered.

  Here, as shown in FIG. 1, the partition receiving step 3c is formed as a step over the entire circumference on the lower surface side of the vibration isolating base 3, and locks the upper end surface of the partition 20 (lid plate 30). To do. In the assembled state of the liquid-filled vibration isolator 100, the partition receiving part 3c is compressed and deformed, and the elastic restoring force of the partition receiving part 3c acts on the partition 20 as a holding force. Thereby, the partition 20 can be clamped and fixed firmly and stably.

  As shown in FIG. 1, the lower surface side of the partition body 20 (main body portion 40) is in contact with the upper surface of the sandwiching member 18, and the outer edge portion of the sandwiching member 18 is the second mounting bracket 2 (cylindrical bracket). 6 and the bottom metal fitting 7), the partition 20 can be firmly held between the clamping member 18 and the partition receiving step 3c of the vibration isolator base 3. As a result, even when a large amplitude or high frequency amplitude is input, chattering of each member can be suppressed, thereby avoiding the influence on the dynamic characteristics due to positional deviation or resonance of each member. Can do.

  As shown in FIG. 1, the partition body 20 is formed with two flow paths of a first orifice 21 and a second orifice 22 therein. The first orifice 21 and the second orifice 22 are orifice passages for communicating the main liquid chamber 11A and the sub liquid chamber 11B, and switching control by the switching device 50 is performed on the first orifice 21.

  In other words, the liquid-filled vibration isolator 100 sets the first orifice 21 in a communicating state at the time of idling (see FIG. 10), and uses the two flow paths of the first orifice 21 and the second orifice 22 to idle. While obtaining a low dynamic spring characteristic in the region, at the time of a shake, the liquid orifice resonance frequency is changed by using only the second orifice 22 as a flow path with the first orifice 21 in a shut-off state (see FIG. 12). High attenuation characteristics in the shake region are obtained.

  As described above, the switching device 50 is a mechanism for switching the communication state of the first orifice 21 (between the main liquid chamber 11A and the sub liquid chamber 11B). As shown in FIG. A rotor 51 disposed in the flow path, and an actuator device 60 that applies a rotational driving force to the rotor 51 and is positioned at a blocking position (see FIGS. 11 and 12). The detailed configuration of the switching device 50 will be described later.

  Next, with reference to FIG. 2, the lid plate portion 30 constituting the partition body 20 will be described. 2A is a top view of the lid plate portion 30, and FIG. 2B is a cross-sectional view of the lid plate portion 30 taken along the line IIb-IIb in FIG. 2A.

  The lid plate portion 30 is a member that constitutes the partition body 20 together with the main body portion 40 described later, and is disposed on the upper surface side of the main body portion 40 (see FIG. 1). As shown in FIGS. 2 (a) and 2 (b), the cover plate portion 30 is formed in a substantially disc shape having an axis O from a steel material, and is formed in a plate thickness direction (FIG. 2 (b) vertical direction). ) And a plurality of openings (the first opening 31 and the second opening 32) arranged in a distributed manner on the plate surface.

  The first opening 31 is an opening serving as an entrance of the first orifice 21 (see FIG. 1) on the main liquid chamber 11A side, and the second opening 32 is the second orifice 22 (see FIG. 1) on the main liquid chamber 11A side. (See below). As shown in FIG. 2A, the first opening 31 is formed in a circular shape when viewed from above, and the second opening 32 is formed in a long hole shape when viewed from above about the axis O. In addition, the opening area of the 1st opening part 31 is made smaller than the opening area of the 2nd opening part 32, as shown to Fig.2 (a).

  The first opening 31 and the second opening 32 are the start ends of the first groove 41 and the second groove 42 recessed in the upper surface of the main body 40 (the terminal ends in the clockwise direction when the main body 40 is viewed from above). , (See FIG. 3A)) (see FIGS. 10 and 12).

  The opening area of the first opening 31 is larger than the cross-sectional area of a first groove 41 (see FIG. 4) described later, and the opening area of the second opening 32 is the second groove 42 (described later). It is made larger than the cross-sectional area of FIG. Therefore, the flow path cross-sectional areas of the first orifice 21 and the second orifice 22 are determined by the cross-sectional areas of the first concave groove 41 and the second concave groove 42.

  Next, the main body 40 constituting the partition 20 will be described with reference to FIGS. 3 to 5. 3A is a top view of the main body 40, and FIG. 3B is a bottom view of the main body 40. As shown in FIG. 4A is a cross-sectional view of the main body 40 taken along line IVa-IVa in FIG. 3A, and FIG. 4B is a cross-sectional view of the main body 40 taken along line IVb-IVb in FIG. FIG. FIG. 5 is a cross-sectional view of the main body 40 taken along the line V-V in FIG.

  The main body 40 is a member that constitutes the partition body 20 together with the lid plate portion 30 described above, and the upper surface side is covered by the lid plate portion 30 (see FIG. 1). As shown in FIGS. 3 to 5, the main body 40 is formed in a cylindrical shape having an axis O from a resin material (PPA in the present embodiment), and has a plurality of concave grooves (first grooves) formed on the upper surface. 1 concave groove 41, second concave groove 42) and a plurality of through holes (first linear flow path 43, second linear flow path 44, storage chamber 45) formed therein.

  The first concave groove 41 is a concave groove for forming the first orifice 21 (first concave groove channel 21a) between the first concave groove 41 and the lid plate portion 30 described above, and the second concave groove 42 is the lid described above. It is a ditch | groove for forming the 2nd orifice 22 (2nd ditch | groove channel 22a) between the board parts 30. FIG.

  As shown in FIG. 3A, the first and second concave grooves 41 and 42 are arc-shaped around the axis O on the upper surface of the main body 40 (the front side surface in FIG. 3A). It is extended to. Further, as shown in FIGS. 4A and 4B, the first concave groove 41 is formed in a groove shape having a substantially semicircular cross section, and the second concave groove 42 is formed in a groove shape having a substantially rectangular cross section. ing.

  The first concave groove 41 extends in an arc shape having a smaller diameter than the second concave groove 42 (that is, located on the axis O side) in the top view shown in FIG. Therefore, the extended length of the first concave groove 41 is set to be shorter than the extended length of the second concave groove 42. Moreover, the cross-sectional area of the 1st ditch | groove 41 is made smaller than the cross-sectional area of the 2nd ditch | groove 42, as shown to Fig.4 (a) and FIG.4 (b).

  The partition body 20 is assembled by the lid plate portion 30 and the main body portion 40 (see FIG. 1), and the lid plate portion 30 is covered with the first concave groove 41 and the second concave groove 42, so that the first orifice 21 of the first orifice 21 is covered. A first groove channel 21a constituting a part and a second groove channel 22a constituting a part of the second orifice 22 are respectively formed (see FIGS. 10 and 12).

  The first straight flow path 43 is a flow path that forms the first orifice 21 together with the first concave groove flow path 21a described above, and the second straight flow path 44 is a second flow path together with the second concave groove flow path 22a described above. This is a flow path for forming the orifice 22 (see FIGS. 10 and 12).

  As shown in FIGS. 3A and 4A, the first straight channel 43 communicates with the end of the first concave groove 41 (the end in the counterclockwise direction in the top view of the main body 40). At the same time, the communication part with the first groove 41 (first groove groove 21a, see FIGS. 10 and 12) is formed as a flow path for communicating with the lower surface of the main body 40 (for example, the front side surface of FIG. 3). Has been.

  That is, the first straight channel 43 is formed as a through-hole that linearly penetrates the main body 40 along the axis O as shown in FIGS. 4 (a) and 4 (b). Further, the cross-sectional shape of the first straight channel 43 is a circle centered on the axis O as shown in FIGS. 3 and 5 (that is, a circle concentric with the outer shape of the main body 40 as shown in FIG. 3). ).

  As shown in FIGS. 4 and 5, a storage chamber 45 (switching chamber 46) serving as a bottomed storage hole is interposed in the flow path of the first straight flow path 43. The rotation of the rotor 51 (see FIGS. 9 and 11) stored in the storage chamber 45 (switching chamber 46) switches the first linear flow path 43 between a communication state and a blocking state. The detailed configuration of the storage chamber 45 and the rotor 51 will be described later.

  As shown in FIG. 3A, the second straight channel 44 communicates with the end of the second groove 42 (the end in the counterclockwise direction in the top view of the main body 40), and the second groove 42. (The second groove channel 22a, see FIGS. 10 and 12) is formed as a channel for communicating with the lower surface side of the main body 40 (for example, the front side surface of FIG. 3).

  That is, as shown in FIG. 4B, the second straight flow path 44 is formed as a through hole that penetrates the main body 40 along the axis O in a straight line. Further, as shown in FIGS. 3 and 5, the cross-sectional shape of the second straight flow path 44 is an oval shape that curves around the axis O (that is, as shown in FIG. The shape of the groove 42 is the same as the shape of the top view. In addition, the cross-sectional area of the 1st linear flow path 43 is made larger than the cross-sectional area of the 2nd linear flow path 44, as shown in FIGS.

  The storage chamber 45 is a space for storing a part of the components of the switching device 50 described later, and includes a switching chamber 46 and a drive chamber 47 as shown in FIGS. It opens to the device 60 side and is configured as a side-bottomed receiving hole. The axis L is orthogonal to the axis O as shown in FIGS.

  The switching chamber 46 is a space in which a rotor 51 (see FIGS. 6 and 8) described later is rotatably accommodated, and is interposed in the flow path of the first straight flow path 43 as shown in FIG. Yes.

  The drive chamber 47 is a space into which a drive shaft 61 of an actuator device 60 to be described later is inserted (see FIG. 1), and has a cross section having a constant cross-sectional area along the axis L as shown in FIGS. It is configured as a circular straight hole and is formed by opening one end side (left side in FIG. 4A) on the peripheral side surface of the main body 40. The drive chamber 47 communicates with the switching chamber 46 via a seal chamber 49 described later.

  As described above, the seal chamber 49 is a space for communicating the switching chamber 46 and the drive chamber 47, and has a cross section having a constant cross-sectional area along the axis L as shown in FIGS. 4 to 5. It is configured as a circular straight hole, with one end side (left side in FIG. 4 (a)) opened to the drive chamber 47 and the other end side (right side in FIG. 4 (a)) opened to the switching chamber 46. Yes.

  Here, as shown in FIGS. 4A and 5, the inner diameter of the seal chamber 49 is larger than the switching chamber 46 and smaller than the inner diameter of the drive chamber 47. Thus, an engagement surface 49a formed as a flat surface orthogonal to the axis L is disposed on the seal chamber 49 side.

  A circular ring member 70 is press-fitted into the seal chamber 49 from the actuator device 60 side (see also FIGS. 17A and 17B). One end surface of the ring member 70 abuts on the engagement surface 49a. A portion on the radially inner side of one end surface of the ring member 70 is a portion that functions as a restricting surface that contacts the rotor 51 and restricts the movement of the rotor 51 in the axis L direction. The other end surface of the ring member 70 is a part that is in close contact with a dust seal 90 described later and functions as a seal surface (see FIG. 9).

  Next, the clamping member 18 will be described with reference to FIG. Fig.7 (a) is a top view of the clamping member 18, FIG.7 (b) is sectional drawing of the clamping member 18 in the VIIb-VIIb line | wire of Fig.7 (a).

  The clamping member 18 is a member for clamping the partition body 20 between the partition body receiving step portion 3c (see FIG. 1) and supports the lower surface side of the main body portion 40 (see FIG. 1). As shown in FIGS. 7 (a) and 7 (b), the sandwiching member 18 is formed in a substantially disc shape having an axis O from a steel material, and the thickness direction (the vertical direction in FIG. 7 (b)). And a plurality of openings (a first opening 18a and a second opening 18b) arranged in a distributed manner on the plate surface.

  The first opening 18a is an opening serving as an entrance / exit of the first orifice 21 (see FIG. 1) on the sub-liquid chamber 11B side, and the second opening 18b is the second orifice 22 (see FIG. 1) on the sub-liquid chamber 11B side. (See below). As shown in FIG. 7A, the first opening 18 has a circular shape in a top view centered on the axis O, and the second opening 18b has a long hole shape in a top view curved around the axis O, respectively. Is formed.

  Here, when the liquid-filled vibration isolator 100 is assembled, the second straight channel 44 (FIG. 3B and FIG. 4B) in which the second opening 18b of the clamping member 18 opens on the lower surface of the main body 40. The relative circumferential position of the clamping member 18 with respect to the main body 40 is positioned so as to overlap (refer to a matching position).

  Note that the opening area of the first opening 18a is larger than the cross-sectional area of the first straight channel 43 (see FIG. 3) described above, and the opening area of the second opening 18b is a second straight channel described later. 44 (see FIG. 3). Therefore, as described above, the flow path cross-sectional areas of the first orifice 21 and the second orifice 22 are determined by the cross-sectional areas of the first concave groove 41 and the second concave groove 42 (see FIG. 4).

  The actuator device 60 is a driving device for applying a rotational driving force to the rotor 51, and mainly includes a driving shaft 61, a pressing cylinder 62, and a case C as shown in FIGS. .

  The drive shaft 61 is formed of a steel material in a shaft shape, and is a shaft-shaped member for transmitting the rotational driving force of the electric motor to the rotor 51. The base side is connected to the electric motor housed in the case C. 9 to 12, the case C is disposed so as to protrude from the front to the front.

  An insertion plate portion 61 a is formed at the protruding end of the drive shaft 61. The insertion plate portion 61 a is formed in a plate shape by chamfering the peripheral side surfaces of the drive shaft 61 facing each other, and is inserted into an insertion recessed portion 53 a provided on the driven shaft 53 of the rotor 51. Interpolated (see FIG. 8). By this interpolation, the drive shaft 61 is connected to the rotor 51, and the rotational driving force of the electric motor can be transmitted to the rotor 51 (driven shaft 53) via the drive shaft 61.

  The pressing cylinder 62 is a member formed in a cylindrical shape from a resin material, and is disposed concentrically on the outer peripheral side of the drive shaft 61 with a space therebetween, and protrudes from the front side of the case C. As will be described later, the inside of the drive chamber 47 is hermetically sealed by the front end surface of the pressing cylinder 62 pressing the dust seal 90 (flange portion 93, see FIG. 9).

  The case C is a box-shaped member formed in a rectangular parallelepiped shape having a space inside from a resin material, and an electric motor, a control circuit thereof, and the like are stored in the internal space.

  In the case C, a regulating device (not shown) that regulates the rotation range of the drive shaft 61 is stored. This regulating device includes a connecting portion connected to the drive shaft 61 and a pair of fixing portions fixed to the case side, and the connecting portion moves in one direction as the drive shaft 61 rotates in the forward direction. Then, the rotation of the drive shaft 61 is restricted by the contact of the connecting portion against one of the pair of fixed portions. Similarly, when the connecting portion is moved in the other direction along with the rotation of the drive shaft 61 in the reverse direction, the connecting portion is brought into contact with the other of the pair of fixed portions, thereby driving the drive shaft 61. Rotation is regulated. As a result, the rotation range of the drive shaft 61 is restricted to 90 degrees.

  Thus, in this Embodiment, since it is the structure which provides a control apparatus in the actuator apparatus 60, compared with the case where a control part is provided in the main-body part 40 and the rotor 51, the structure of the partition 20 is simplified. be able to. Therefore, it is possible to improve the yield when the main body 40 and the rotor 51 are manufactured. In addition, since the shape is simplified, variation in dimensional accuracy can be suppressed and dynamic characteristics can be improved.

  Next, the rotor 51 that constitutes the switching device 50 will be described with reference to FIGS. 6 and 8. 8A is a top view of the rotor 51, and FIG. 8B is a cross-sectional view of the rotor 51 taken along the line XIIb-XIIb of FIG. 8A.

  The rotor 51 is a shaft-like member for switching the first orifice 21 (first linear flow path 43) between a communication state and a blocking state (see FIGS. 9 and 11), and a resin material (in the present embodiment, And a rotation main body 52 and a driven shaft 53. The rotor 51 may be made of an aluminum material. Further, if the rotor 51 and the main body 40 are made of different materials (for example, the rotor 51 is made of an aluminum material and the main body is made of another metal), it is possible to avoid contact (collapse) between the contact surfaces of the two.

  The rotary body 52 is a member that is rotatably accommodated in the switching chamber 46 (see FIGS. 4A and 5). As shown in FIGS. The cylindrical body having a circular cross section having an area is configured. The outer diameter dimension of the rotating body 52 (columnar body) is set to a dimension value slightly smaller than the inner diameter dimension of the switching chamber 46 (in this embodiment, a dimension value 0.4 mm smaller in diameter).

  Moreover, the rotation main body 52 is provided with the connection flow path 52a, as shown in FIG. This connection flow path 52a is formed to penetrate linearly from one peripheral side surface (FIG. 8 (b) upper side surface) to the other peripheral side surface (FIG. 8 (b) lower side surface) of the rotating body 52, It is configured as a straight hole with a circular cross section having a constant cross sectional area along the penetrating direction (vertical direction in FIG. 8B).

  The connection channel 52 a is set to have the same inner diameter as the inner diameter of the first linear channel 43, and the first linear channel 43 in a state where the rotating body 52 is accommodated in the switching chamber 46. (See FIG. 9). Further, the axis m of the connection channel 52a is orthogonal to the axis L of the rotating body 52, as shown in FIG.

  The rotor 51 communicates with the first straight flow path 43 through the connection flow path 52a by opening both ends of the connection flow path 52a in the first straight flow path 43 (see FIG. 9). It is rotated by 90 degrees from the rotation position, and the peripheral side surface of the rotation main body 52 (that is, the non-opening surface where the connection channel 52a is not opened) is positioned in the first linear channel 43, whereby the first linear flow The path 43 is blocked by the peripheral side surface of the rotary body 52 (see FIG. 11). Thereby, the 1st orifice 21 can be switched to a communication state and a interruption | blocking state (refer FIG.10 and FIG.12).

  The driven shaft 53 is a portion to which the rotational driving force of the actuator device 60 is input, protrudes from one end surface side (left side in FIG. 8A) of the rotating body 52, and has a constant cross-sectional area along the axis L. It is comprised in the cylindrical body of a cross section with a circular shape. The outer diameter dimension of the driven shaft 53 (columnar body) is set to a smaller dimension value than the outer diameter dimension of the rotating body 52.

  As a result, as shown in FIG. 8, an engagement surface 52 b formed as a flat surface perpendicular to the axis L is disposed on one end surface side (left side in FIG. 8A) of the rotary body 52. . When the rotating main body 52 is accommodated in the switching chamber 46, the engagement surface 52 b of the rotating main body 52 is brought into contact with one end surface of the ring member 70, thereby moving the rotor 51 in the direction of the axis L. It is regulated (see FIGS. 9 and 11).

  Here, the driven shaft 53 includes an inserted recess 53a and an annular groove 53b. The inserted recess 53a is a portion into which an insertion plate portion 61a (see FIG. 6) formed on the drive shaft 61 of the actuator device 60 is inserted. As shown in FIG. A slit having a predetermined width extends from the left side surface (FIG. 8B) toward the rotary body 52, thereby forming a pair of opposing surfaces facing each other at a predetermined interval.

  An insertion plate portion 61a (see FIG. 6) formed on the drive shaft 61 is inserted into the inserted recess 53a, so that the drive shaft 61 and the driven shaft 53 generate the rotational driving force of the actuator device 60. It connects so that transmission to the rotation main body 52 is possible (refer FIG.9 and FIG.11).

  The inter-insertion recessed portion 53a has a pair of opposed surfaces formed in parallel to each other, and the pair of opposed surfaces is configured as a plane perpendicular to the axis m of the connection channel 52a described above. . Thereby, the directionality of the rotor 51 can be eliminated, and the workability during the assembly work can be improved.

  The annular groove 53b is a holding groove having a rectangular cross section for holding the O-ring R. As shown in FIG. 8, the annular groove 53b is an annular groove continuously recessed over the entire outer peripheral surface of the driven shaft 53. It is formed as a concave groove. In the present embodiment, the annular groove 53 b is disposed at two locations on the outer peripheral surface of the driven shaft 53. Here, the seal structure of the seal chamber 49 using the O-ring R will be described.

  The O-ring R is a seal member that is formed from a rubber-like elastic body as a wire ring having a circular wire cross section, and is attached (held) to the annular groove 53b of the driven shaft 53 as described above.

  As shown in FIG. 9, in the seal chamber 49, the O-ring R held in the annular groove 53b of the driven shaft 53 is pressed against the inner peripheral surface of the ring member 70 and crushed with a predetermined crushing allowance. The switching chamber 46 side and the driving chamber 47 (see FIG. 4A) side are partitioned in an airtight state, whereby the fluid in the switching chamber 46 is prevented from leaking to the driving chamber 47.

  The outer diameter dimension of the driven shaft 53 is set to a dimension value slightly smaller than the inner diameter dimension of the ring member 70. The difference between the inner and outer diameters is preferably set within a range of 0.3 mm to 0.5 mm. In this case, the compression allowance of the O-ring R is a value at which the outer diameter of the linear section is reduced by 15% to 25%. It is preferable to set to. Thereby, even if the dimensional tolerance is large, the rotor 51 can be smoothly rotated while ensuring the sealing performance. In the present embodiment, the difference between the inner and outer diameters is set to 0.4 mm, and the compression allowance is set to 20%.

  The rotor 51 is inserted into a horizontally-bottomed storage chamber 45 formed in the main body portion 40 of the partition body from the side corresponding to the actuator device 60 side, and the axial tip portion S of the rotor 51 is connected to the partition body. It fits into a fitting recess 71 formed in the bottom of the 20 storage chambers 45. The front end S in the axial direction of the rotor 51 is formed in a partial spherical shape. Specifically, the front end S in the axial direction of the rotor 51 is formed in a hemispherical shape. The center of the tip 51 of the rotor 51 in the axial direction (the center of the hemisphere) is located on the axis m of the connection flow path 52a. The center of the tip S may be located near the axis m or at a position separated from the axis m.

For example, in the structure in which the rotor 51 is inserted into the main body portion 40 of the partition body 20 from the side opposite to the actuator device 60 in the horizontal direction, a through hole penetrating in the horizontal direction must be formed in the main body portion 40 of the partition body 20. In other words, there is a problem that the degree of freedom in design becomes low, for example, the orifice has to be arranged avoiding the through hole.
On the other hand, according to the above-described configuration of the present invention, the partition body 20 is formed with the side-bottomed storage chamber 45, and the outer side of the bottom of the storage chamber 45 (opposite to the actuator device 60). Since the cavity for accommodating the rotor 51 is not formed on the side), the above-described problems are not caused, and the degree of freedom in design can be increased.

Further, since the tip end S in the axial direction of the rotor 51 is formed in a hemispherical shape, the contact area between the tip S in the axial direction of the rotor 51 and the fitting recess 71 of the partition member 20 can be reduced. The sliding area between the axial tip portion S of the rotor 51 and the fitting recess 71 of the partition 20 can be reduced.
As a result, the sliding resistance between the axial tip portion S of the rotor 51 and the fitting recess 71 of the partition member 20 can be reduced, the driving force of the actuator device 60 can be reduced, and the actuator device 60 can be made smaller. Can be

  Next, the dust seal 90 will be described with reference to FIGS.

  The dust seal 90 is a seal member for preventing foreign matter such as dust and moisture from entering the seal chamber 49 and the connecting portion between the drive shaft 61 and the rotor 51 from the outside. It has a substantially cylindrical shape and includes a cylindrical portion 91, an outer fitting portion 92, and a flange portion 93.

  The cylindrical portion 91 is configured in a cylindrical shape having a constant inner diameter and outer diameter along the axis L. The outer diameter of the cylinder portion 91 is set to a dimension value slightly smaller than the inner diameter of the pressing cylinder 62 of the actuator device 60. In addition, the inner diameter of the cylindrical portion 91 is set to a slightly larger dimension value than the outer diameter of the driven shaft 53 of the rotor 51.

  The outer fitting portion 92 is a portion that is fitted on the drive shaft 61 of the actuator device 60, and is formed so as to protrude toward the inner peripheral side at one end side of the cylindrical portion 91. Note that the inner diameter of the outer fitting portion 92 is set to a slightly larger dimension value than the outer diameter of the drive shaft 61 of the actuator device 60.

  The flange portion 93 is a portion that is held narrowly between the ring member 70 and the pressing cylinder 62 of the actuator device 60, and is formed to project outward in the radial direction on the other end side of the cylinder portion 91.

  The outer diameter of the flange portion 93 is set to a dimension value that is larger than the outer diameter of the pressing cylinder 62 of the actuator device 60 and smaller than the inner diameter of the drive chamber 47 (see FIG. 4A) of the main body portion 40. (See FIGS. 9 and 11).

  As a result, the actuator device 60 is fastened and fixed to the tubular fitting 6, and the flange portion 93 is pressed toward the ring member 70 at the front end surface of the pressing tube 62, and the flange portion 93 is compressed and deformed to a predetermined collapse allowance. Thus, foreign matter such as dust and moisture can be prevented from entering the seal chamber 49 and the connecting portion between the drive shaft 61 and the rotor 51 from the outside.

  FIG. 10 is a schematic view of the liquid-filled vibration isolator 100 schematically showing the communication state of the liquid chamber 11, and FIG. 9 is a partial enlarged cross-sectional view of the liquid-filled vibration isolator 100. These states correspond to the state in which the rotor 51 is in the communication position and the first orifice 21 is in communication. Therefore, the main liquid chamber 11 </ b> A and the sub liquid chamber 11 </ b> B are in communication with each other through the two flow paths of the first orifice 21 and the second orifice 22.

  In FIG. 10, a two-dot chain line indicated by reference symbol A indicates a flow path of a fluid flowing from the main liquid chamber 11A to the sub liquid chamber 11B via the second orifice 22, and a two-dot chain line indicated by reference symbol B A flow path of a fluid flowing from the main liquid chamber 11A to the sub liquid chamber 11B via the first orifice 21 is shown.

  FIG. 12 is a schematic view of the liquid-filled vibration isolator 100 schematically showing the communication state of the liquid chamber 11, and FIG. 11 is a partial enlarged cross-sectional view of the liquid-filled vibration isolator 100. The states shown in these correspond to the state where the rotor 51 is in the blocking position and the first orifice 21 is blocked.

  In FIG. 12, a two-dot chain line indicated by reference symbol A indicates a flow path of a fluid flowing from the main liquid chamber 11A to the sub liquid chamber 11B via the second orifice 22, and a two-dot chain line indicated by reference symbol B A flow path of a fluid flowing from the main liquid chamber 11A to the sub liquid chamber 11B via the first orifice 21 is shown. However, in FIG. 12, since the rotor 51 is in the blocking position and the first orifice 21 is blocked, the main liquid chamber 11A and the sub liquid chamber 11B are communicated only via the second orifice 22. .

  Thus, in the communication state shown in FIGS. 10 and 9, two flow paths of the first orifice 21 and the second orifice 22 are used, whereas in the shut-off state shown in FIGS. Since there is only one path of the second orifice 22 and the cross-sectional area and flow path length of the entire flow path are different, liquid column resonance in the communication state and the cutoff state can be generated in different frequency regions.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed.

  In the above embodiment, the tip 51 in the axial direction of the rotor 51 is formed in a partial spherical shape. Instead of this structure, as shown in FIGS. 13 to 18, the tip in the axial direction of the rotor 51 is used. The section S is formed in a circular cross section having a constant diameter, that is, a cylindrical shape, and is fitted in a fitting recess 71 having a constant cross section formed in the bottom of the storage chamber 45 of the partition body 20. Also good.

  That is, as shown in FIGS. 13 to 18, the rotor 51 is inserted into a laterally-bottomed storage chamber 45 formed in the main body portion 40 of the partition body from the side corresponding to the actuator device 60 side, The front end S in the axial direction 51 is fitted in a fitting recess 71 formed in the bottom of the storage chamber 45 of the partition body 20.

For example, in the structure in which the rotor 51 is inserted into the main body portion 40 of the partition body 20 from the side opposite to the actuator device 60 in the horizontal direction, a through hole penetrating in the horizontal direction must be formed in the main body portion 40 of the partition body 20. In other words, there is a problem that the degree of freedom in design becomes low, for example, the orifice has to be arranged avoiding the through hole.
On the other hand, according to the above-described configuration of the present invention, the partition body 20 is formed with the side-bottomed storage chamber 45, and the outer side of the bottom of the storage chamber 45 (opposite to the actuator device 60). Since the cavity for accommodating the rotor 51 is not formed on the side), the above-described problems are not caused, and the degree of freedom in design can be increased.

  The numerical values (for example, the quantity, size, angle, etc. of each component) given in the above embodiment are merely examples, and other numerical values can naturally be adopted. For example, in the above embodiment, the case where the difference between the outer diameter dimension of the driven shaft 53 and the inner diameter dimension of the seal chamber 49 is set within the range of 0.3 mm to 0.5 mm has been described. It is not limited, and values outside this range (for example, 0.1 mm to 0.3 mm) can be adopted.

  Moreover, the material raised in the said embodiment is an example, and it is naturally possible to employ | adopt another material. For example, you may comprise the main-body part 40 from aluminum die-casting.

  Control of the switching mechanism 50 (that is, switching of the rotational position of the rotor 51) can be performed based on the engine speed, but is not necessarily limited to this, and may be performed based on other states. Of course it is possible. Examples of other states include vehicle speed. That is, if the vehicle speed detected by the vehicle speed detection device is 0 km / h or less than a predetermined reference value, the rotor 51 is positioned at the communication position, and if the vehicle speed exceeds 0 km / h or a predetermined reference value, the rotor 51 May be switched so as to be positioned at the blocking position.

  In the embodiment described above, the case where the driven shaft 53 of the rotor 51 is provided with the annular grooves 53b at two locations, and the O-rings R having the configuration common to the two annular grooves 53b are respectively described. Thereby, even when one side is damaged, a sealing function can be secured. However, it is possible to provide the annular groove 53b at three or more locations.

It is sectional drawing of the liquid filled type vibration isolator in one embodiment of this invention. (A) is a top view of a cover board part, (b) is sectional drawing of the cover board part in the IIb-IIb line | wire of Fig.2 (a). (A) is a top view of a main-body part, (b) is a bottom view of a main-body part. (A) is sectional drawing of the main-body part in the IVa-IVa line | wire of Fig.3 (a), (b) is sectional drawing of the main-body part in the IVb-IVb line | wire of Fig.3 (a). It is sectional drawing of the main-body part in the VV line | wire of Fig.4 (a). It is a disassembled perspective view which shows a rotor etc. FIG. (a) is a top view of a clamping member, (b) is sectional drawing of the clamping member in the VIIb-VIIb line | wire of Fig.7 (a). (A) is a top view of a rotor, (b) is sectional drawing of the rotor in the XIIb-XIIb line | wire of Fig.8 (a). It is a partial expanded sectional view of a liquid enclosure type vibration isolator, and respond | corresponds to the state with which the 1st orifice was connected. It is a schematic diagram of the liquid filled type vibration isolator which shows the communication state of a liquid chamber, and respond | corresponds to the state where the 1st orifice was connected. It is a partial expanded sectional view of a liquid enclosure type vibration isolator, and respond | corresponds to the state by which the 1st orifice 21 was interrupted | blocked. It is a schematic diagram of the liquid filled type vibration isolator showing the communication state of the liquid chamber, and corresponds to the state where the first orifice 21 is shut off. It is a partial expanded sectional view of the liquid filling type vibration isolator of another embodiment, and respond | corresponds to the state with which the 1st orifice was connected. It is a partial expanded sectional view of the liquid enclosure type vibration isolator of another embodiment, and corresponds to the state where the 1st orifice was intercepted. It is a disassembled perspective view which shows the rotor etc. of another embodiment. It is a figure which shows another embodiment, (a) is a top view of a rotor, (b) is sectional drawing of the rotor in the XIIb-XIIb line | wire of Fig.12 (a). (A) is sectional drawing of a ring member, (b) is a front view of a ring member It is a figure which shows another embodiment, (a) is a figure of another embodiment corresponding to the cross section of the main-body part in the IVa-IVa line | wire of Fig.3 (a), (b) is a figure of Fig.3 (a). It is a figure of another embodiment corresponding to sectional drawing of the main-body part in the IVb-IVb line | wire.

Explanation of symbols

1 First mounting bracket (first mounting bracket)
1a Fastening hole 1b Positioning convex part 2 Second mounting bracket (second mounting tool)
3 Anti-vibration base 3a Rubber film 3b Covering portion 3c Partition body receiving step portion 5
Mounting bolt 6 Cylindrical bracket (part of second mounting tool)
7 Bottom bracket (part of second fixture)
7a
Positioning convex part 8 Stabilizer bracket 9 Diaphragm 10
Mounting plate 11 Liquid sealing chamber 11A Main liquid chamber 11B Sub liquid chamber 13
Cover member 18
Holding member 18a First opening 18b Second opening 20 Partition body 21 First orifice 21a First groove channel 22 Second orifice 22a Second groove channel 30 Cover plate portion 31 First opening 32 Second opening Portion 40 Main body 41 First groove 42 Second groove 43 First straight channel 44 Second straight channel 45 Housing hole (housing chamber)
46 switching chamber 47 drive chamber 49 seal chamber 49a engaging surface 50 switching device (switching means)
51 Rotor 52 Rotating body 52a Connection channel 52b Engagement surface 53 Driven shaft 53a Inserted recess 53b Annular groove 60 Actuator device 61 Drive shaft 61a Insertion plate 62 Press cylinder 70 Ring member 71 At the bottom of the receiving hole Formed fitting recess 90 Dust seal 91 Tube portion 92 Outer fitting portion 93 Flange portion 100 Liquid-filled vibration isolator O shaft center L shaft center m shaft center R O-ring S tip portion (tip portion in the axial direction of the rotor)
C case

Claims (4)

A first fixture, a cylindrical second fixture, a vibration isolating base that connects the second fixture and the first fixture and is made of a rubber-like elastic body, and the second fixture. A diaphragm which is attached and forms a liquid enclosure chamber between the vibration isolating substrate, a partition body which partitions the liquid enclosure chamber into a main liquid chamber on the vibration isolating substrate side and a sub liquid chamber on the diaphragm side; A liquid comprising a first orifice and a second orifice that are formed in the partition and communicate with each other between the main liquid chamber and the sub liquid chamber, and switching means for switching the communication state between the main liquid chamber and the sub liquid chamber. In the enclosed vibration isolator,
The first orifice and the second orifice are formed in parallel to the partition as flow paths independent of each other,
The partition body includes a main body configured in a columnar shape, and a plate-like lid plate that is covered with an upper surface of the main body,
The first orifice includes a first groove channel formed by covering the lid plate with a first groove formed in a groove shape on the upper surface of the main body, and the first groove. A first linear flow path formed in a straight line through the main body portion toward the lower surface and communicated with the flow path;
The second orifice includes a second groove channel formed by covering the lid plate portion with a second groove formed in a groove shape on the upper surface of the main body, and the second groove. A second linear flow path formed in a straight line through the main body portion toward the lower surface and communicated with the flow path;
The partition includes a switching chamber interposed in the flow path of the first straight flow path in the first orifice,
The switching means includes a columnar rotor that is rotatably accommodated in the switching chamber, and an actuator device that applies a rotational driving force to the rotor, and the rotor moves the rotor from one peripheral side to the other. A connecting flow path formed linearly toward the peripheral side surface of
The rotation of the rotor causes the first linear flow channel to communicate with each other via the connection flow channel of the rotor, and the peripheral surface of the rotor blocks the first linear flow channel, thereby communicating the first orifice. And is configured to switch to a blocking state,
Opened on the actuator device side, a horizontally-bottomed bottomed receiving hole having the switching chamber is formed in the partition body,
The rotor is inserted into the accommodation hole from the side corresponding to the actuator device side, and the axial tip portion of the rotor is fitted into a fitting recess formed at the bottom of the accommodation hole of the partition body Liquid-filled vibration isolator.   The liquid-filled vibration isolator according to claim 1, wherein an axial tip portion of the rotor is formed in a partial spherical shape, and the fitting concave portion is formed in a partial spherical shape.   The liquid-filled vibration isolator according to claim 2, wherein the axial tip portion of the rotor is formed in a hemispherical shape.   The liquid-filled vibration isolator according to claim 1, wherein the rotor and the partition are made of different materials.

Images