JPH0712747Y2 - Cylindrical control mount - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention comprises a fluid chamber that communicates with each other through an orifice passage, and changes the viscosity of an encapsulated electrorheological fluid by a control voltage so that the inside of the orifice passage is changed. The present invention relates to a cylindrical control mount capable of changing the damping ratio of the.

2. Description of the Related Art As a cylindrical control mount of this type, for example, Japanese Patent Application No.
-217646 has been proposed.

That is, as shown in FIG. 5, the cylindrical control mount 1 includes an inner cylinder member 2, an outer cylinder member 3, and inner and outer cylinder members thereof.
And a support elastic body 4 interposed between the outer cylinder member 3 and the support elastic body 4. Chambers 5 and 5a are formed.

Then, between the outer cylinder member 3 and the support elastic body 4,
An annular orifice member 6 formed of an insulating member is inserted, and an orifice passage 6a formed in the orifice member 6 allows the fluid chambers 5 and 5a to communicate with each other, and these fluid chambers 5 and 5a and In the orifice passage 6a,
An electrorheological fluid whose viscosity is changed by the applied voltage is enclosed.

On the other hand, a pair of electrode plates 7 and 7a are mounted on the inner circumference of the orifice passage 6a in the radial direction, and by applying a control voltage to the electrode plates 7 and 7a, the fluid viscosity in the orifice passage 6a is reduced. It is changed so that the damping rate is adjusted.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the conventional cylindrical control mount 1, the orifice passage 6a is formed in the orifice structure 6 as described above, and the inner diameter side and the outer diameter side of the orifice passage 6a are formed. Since the electrode plates 7 and 7a are arranged on the inner peripheral surface, the wall portion of the orifice structure 6 is inevitably required at the portion to which the electrode plates 7 and 7a are attached. The cross-sectional area of is reduced.

The entire surface of the electrode plates 7, 7a is the orifice passage.
Since the orifice structure 6 is formed of an insulating member because it is mounted on the inside and the outside of 6a, a voltage leaks through the insulating member and the positive electrode side electrode plate of the electrode plates 7 and 7a. An electric field is generated between the earth electrode and the outer cylinder member or the inner cylinder member, and the input voltage cannot be effectively used.

Further, there is a problem that the dispersoid in the electrorheological fluid is attached to the surface of the orifice structure 6 formed of the insulating member, and the dispersoid reduces the insulation resistance between the electrode plates 7 and 7a.

Therefore, the present invention can secure a large cross-sectional area of the orifice passage, reduce the voltage leaked from the electrode member to the outside of the orifice passage as much as possible, and significantly reduce the adhesion of dispersoids. It is an object of the present invention to provide a cylindrical control mount.

Means for Solving the Problems In order to achieve the above object, the present invention provides an inner cylinder member attached to one of a vibrating body and a body to be vibrated, and an outer cylinder of the inner cylinder member. An outer cylinder member attached to the other of the vibrating body or the body to be excited, a support elastic body interposed between the inner cylinder member and the outer cylinder member, a main fluid chamber defined by the support elastic body, A sub-fluid chamber that is provided separately from the main fluid chamber and is separated by an elastic thin film, and an arc-shaped sub-fluid chamber that connects the main fluid chamber and the sub-fluid chamber and is arranged along the inner circumference of the outer tubular member. An orifice passage and an electrode orifice formed in the orifice passage and including an electrode member to which a control voltage is applied are provided, and the viscosity is changed in the main fluid chamber, the sub-fluid chamber, and the electrode orifice according to the applied voltage. Enclose the electrorheological fluid, In a cylindrical control mount in which an attenuation rate of a fluid moving in an orifice passage is variable according to a control voltage applied to the electrode orifice, the electrode member of the electrode orifice is the outer cylinder member and the support elastic member. First and second negative electrodes, which are arranged radially apart from the body with a predetermined gap, separate the two sides of the orifice passage in the radial direction by themselves, and to which the voltage of the ground electrode is applied respectively. A plate and a positive electrode plate to which a positive control voltage is applied are arranged by supporting an appropriate place between these first and second negative electrode plates via an insulating member.

Further, an insertion hole that connects the outside of the outer tubular member and the positive electrode plate is formed in one of the insulating members, and a connector for applying a voltage to the positive electrode plate is attached to the insertion hole. It is desirable to have a configuration.

Further, the insertion hole can be made to communicate with the inside of the orifice passage, and the insertion hole can be liquid-tightly stopped by the connector so that the insertion hole can be used as an injection port of an electrorheological fluid.

With the above configuration, in the cylindrical control mount of the present invention, the electrode member of the electrode orifice is composed of the first and second negative electrode plates and the positive electrode plate disposed between these negative electrode plates. Since both sides of the orifice passage in the radial direction are separated by the first and second negative electrode plates themselves, the cross-sectional area of the orifice passage can be set large without the need for the conventionally used orifice structure.

Since the positive electrode plate is arranged between the first and second negative electrode plates in the electrode member, the applied voltage output to the positive electrode plate is the first voltage on both sides of the positive electrode plate. The electric field can be generated only between the second negative electrode plate, that is, in the orifice passage, and the positive electrode plate is supported at an appropriate position, that is, partially supported by the insulating member.
The amount of voltage leakage can be reduced as much as possible.

Further, by adopting a configuration in which the connector is attached to the insertion hole formed in one of the insulating members, the connector attachment structure can be simplified.

Furthermore, by further connecting the insertion hole for attaching the connector to the inside of the orifice passage to serve as an injection port for the electrorheological fluid, the structure can be further simplified.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

That is, FIGS. 1 to 4 show a cylindrical control mount 10 showing an embodiment of the present invention, and the cylindrical control mount 10 will be described as an example when it is used as an engine mount of a vehicle.

The cylindrical control mount 10 includes an inner cylinder member 12 and an outer cylinder member 14 arranged so as to surround the outer side of the inner cylinder member 12,
One of the inner cylinder member 12 and the outer cylinder member 14 is attached to the power unit side (not shown) as a vibrating body, and the other is attached to the vehicle body side as a vibrating body.

A support elastic body 16 for supporting the load of the power unit is interposed between the inner cylinder member 12 and the outer cylinder member 14.

The inner peripheral portion of the support elastic body 16 is vulcanized and adhered to the outer periphery of the inner cylindrical member 12, and the outer peripheral portion of the support elastic body 16 is an annular member press-fitted into the inner peripheral portion of the outer cylindrical member 14. Liquid-tightly press-fitted and fixed in the inside of 18 via the lip portion 16a.

The lower part of the support elastic body 16 in the drawing is cut out,
A main fluid chamber 20 is formed between the inner periphery of the annular member 18 and
In addition, a sub-fluid chamber 24 is formed above the supporting elastic body 16 with the diaphragm 22 formed in a thin film shape having a space S as a partition wall.

A groove portion 16b is formed in the central portion of the outer periphery of the support elastic body 16, a subframe 26 having a U-shaped cross section is fitted and vulcanized and adhered to the groove portion 16b, and the subframe 26 is The main fluid chamber 20 and the sub-fluid chamber 24 are cut off and separated into two arc-shaped members in the left-right direction in FIG.

By the way, the annular member 18 and the sub-frame 26 are each formed of a metal plate, and the annular member 18 is used as a first negative electrode plate, and the sub-frame 26 is used as a second negative electrode plate. The space between the subframe 26 and the subframe 26 is configured as an orifice passage 28.

The annular member 18 and the sub-frame 26 are separated from each other by a predetermined distance so as to secure the cross-sectional area required for the orifice passage 28.

Here, a horseshoe-shaped positive electrode plate 30 in which the main fluid chamber 20 is cut off is disposed between the annular member 18 and the sub-frame 26, and both ends of the positive electrode plate 30 have the first insulation. Element
The positive electrode plate 30 is supported by the sub-frame 26 via the second insulating member 32 and the central portion of the positive electrode plate 30 is the third insulating member.
It is supported by the upper end of the annular member 18 in the figure via 36.

The orifice passage 28, the annular member 18 serving as the first and second negative electrode plates and the subframe 26, and the positive electrode plate 30 constitute an electrode orifice 35.

The size of the positive electrode plate 30 in the mount axis direction is smaller than that of the annular member 18 and the sub-frame 26, and both side portions of the positive electrode plate 30 have the orifice passages inside and outside the positive electrode plate 30. 28 are in communication with each other.

The first and second insulating members 32 and 34 are insulated washers 32a and 34a interposed between the sub-frame 26 and the positive electrode plate 30 and the insulating washers 32a and 34a penetrating the positive electrode plate 30. The insulating washers 32a, 34a and the insulating bushes 32b, 34b are inserted into the insulating bushes 32b, 34b, and metal screws 38, 40 through which the insulating bushes 32b, 34b penetrate are screwed into the sub-frame 26. It is fixed by being worn.

Therefore, the screws 38 and 40 are electrically short-circuited with the sub-frame 26 via the screwed portion, and further, the metal washers fitted to the heads of the screws 38 and 40 are used. Four
2, 44 are pressedly contacted with the inner periphery of the annular member 18, and the annular member 18 is provided via these screws 38, 40 and washers 42, 44.
And the subframe 26 are short-circuited.

On the other hand, the third insulating member 36 includes an insulating washer 36a interposed between the annular member 18 and the positive electrode plate 30, and an insulating bush 36b penetrating the annular member 18 and inserted into the insulating washer 36a.
Consists of these insulating washers 36a and insulating bushes 3
6b is a metal screw 4 which is penetrated by the insulating bush 36b.
6 is fixed by being screwed onto the positive electrode plate 30.

The first, second and third insulating members 32, 34 and 36 are
Each washer and bush are formed of an insulating material such as alumina porcelain.

The screw 46 is an opening 14 formed at the upper end of the outer cylinder member 14.
A washer 50 is attached to the insulating bush 36b from a, and a washer 50 to which a wiring 48 for controlling voltage output is connected is attached to the screw 46. The screw 46 is attached to the positive electrode plate 30. Is used as a connector for applying a voltage to the positive electrode plate 30 with the screwed portion of the screw 46.

The portion of the positive electrode plate 30 to which the screw 46 is screwed is double-folded to improve the strength of the screwed portion.

Further, the insertion hole 36c of the insulating bush 36b into which the screw 46 is inserted is penetrated into the orifice passage 28 inside the positive electrode plate 30, and the insertion hole 36c is liquid-tightly closed by the screw 46, With the screw 46 removed, the insertion hole 36
The orifice passage 28 is communicated with the outside of the outer tubular member 14 via c, and in this state, the insertion hole 36c is used as an inlet for the hydraulic fluid.

By the way, an electrorheological fluid is used as the working fluid injected from the insertion hole 36c, and the electrorheological fluid is sealed in the main fluid chamber 20, the sub fluid chamber 24 and the orifice passage 28.

The electrorheological fluid has a property that the viscosity is remarkably increased when a high electric field is applied, and in this embodiment, between the positive electrode plate 30 of the electrode orifice 35 and the annular member 18 and the subframe 26. When a high voltage is applied, the fluid viscosity in the orifice passage 28 is set to be high.

On the other hand, at the upper end of the outer cylinder member 14 in the figure, the opening 14
A cover 52 is attached to cover a, a high voltage transformer 54 and a transistor 56 are housed in the cover 52, and a 12V voltage supplied from a battery (not shown) is applied to the transistor 56,
By applying a high frequency through the high voltage transformer 54,
Secondary side of the high-voltage transformer 56 (screw 46 as a connector
High voltage is generated on the side).

Of course, by stopping the voltage drive by the high voltage transformer 56, the output of the high voltage is also stopped.

Further, the annular member 18 and the sub-frame 26 used as the first and second negative electrode plates are provided with an outer cylinder member mounted on the vehicle body side.
Ground voltage is applied from 14.

In the cylindrical control mount 10 of the present embodiment having the above configuration, when the inner cylinder member 12 and the outer cylinder member 14 are relatively moved by the vibration of the power unit, the support elastic body 16 is deformed accordingly. Then, the volume in the main fluid chamber 20 is changed, and the fluid (electrorheological fluid) in the main fluid chamber 20 is moved between the sub fluid chamber 24 and the orifice passage 28.

At this time, by making the fluid resonate in the orifice passage 28, the dynamic spring of the mount can be remarkably lowered, and normally, the lowered region of this dynamic spring is tuned to the idle vibration generation region. Is effectively reduced from being transmitted to the vehicle body.

By the way, in order to generate fluid resonance in the orifice passage 28, the lower the viscosity of the fluid is, the better, and the voltage application to the electrode orifice 35 is stopped.

On the other hand, when an engine shake occurs in which the power unit resonates with road surface vibration, it is desirable to block the inside of the orifice passage 28 for the purpose of restricting the swing of the power unit, and a high voltage is applied to the electrode orifice 35 to apply the orifice. The fluid viscosity in the passage 28 is set high.

By the way, when a voltage is applied to the electrode orifice 35, the annular member 18 and the sub-frame 26 as a negative electrode plate.
Are arranged on both sides of the positive electrode plate 30 and the positive electrode plate 30
Is partially supported via the first, second and third insulating members, so that the leak voltage can be greatly reduced.

Further, since the orifice passage 28 of the electrode orifice 35 is divided by the annular member 18 which is the negative electrode plate and the sub-frame 26 on both sides in the radial direction, the orifice structure body formed of an insulator as in the conventional case. Is not necessary, and the cross-sectional area of the orifice passage 28 can be set large.

Further, insulating members 32, 34, for supporting the positive electrode plate 30.
Since 36 is partially arranged and its surface area can be significantly reduced, the dispersed mass in the electrorheological fluid adhering to the surface of the insulator can be significantly reduced, and the decrease in insulation resistance can be significantly reduced. Can be suppressed.

By the way, of the insulating members 32, 34, 36, the third insulating member 36
By using the screw 46 for fixing the connector as a connector for applying a voltage to the positive electrode plate 30, the structure can be simplified and the number of parts can be reduced.

Also, an insulating bouche 36b to which the screw 46 is attached
Since the insertion hole 36c of the above communicates the outside of the outer tubular member 14 with the inside of the orifice passage 28 and the insertion hole 36c is used as an inlet for the electrorheological fluid, a structure for enclosing the electrorheological fluid is provided. Significantly simplified.

As described above, in the cylindrical control mount according to claim 1 of the present invention, the electrode member of the electrode orifice is
Conventionally, the first and second negative electrode plates and the positive electrode plate disposed between both the negative electrode plates are provided, and both sides in the radial direction of the orifice passage are separated by the first and second negative electrode plates themselves. Since the used orifice structure is not required and the cross-sectional area of the orifice passage can be set large, the degree of freedom in design can be greatly increased.

Since the positive electrode plate is arranged between the first and second negative electrode plates in the electrode member, the applied voltage output to the positive electrode plate is the first voltage on both sides of the positive electrode plate. The electric field can be generated only between the second negative electrode plate, that is, in the orifice passage, and the positive electrode plate is supported at an appropriate position, that is, partially supported by the insulating member.
It is possible to reduce the leak amount of the voltage as much as possible and prevent the loss of the output voltage as much as possible.

Further, according to the second aspect of the present invention, the connector mounting structure can be simplified and the number of parts can be increased by configuring the connector to be attached to the opening formed in one of the insulating members of the first aspect. Along with the reduction of, the cost can be reduced significantly.

Further, according to claim 3 of the present invention, the insertion hole for mounting the connector according to claim 2 is communicated with the orifice passage,
The use of the insertion hole as an injection port for the electrorheological fluid has an excellent effect that the structure can be further simplified.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG.
Fig. 3 is a sectional view taken along line II-II in Fig. 3, Fig. 3 is a sectional view taken along line III-III in Fig. 1, and Fig. 4 is an exploded perspective view showing an embodiment of the present invention.
FIG. 5 is a sectional view showing a conventional cylindrical control mount. 10 ... Cylindrical control mount, 12 ... Inner cylinder member, 14 ... Outer cylinder member, 16 ... Indicator elastic body, 18 ... Annular member (first negative electrode plate), 20 ... Main fluid chamber, 24 ...... Sub fluid chamber, 26 ...... Sub frame (second negative electrode plate), 28 ...... Orifice passage, 30
…… Positive electrode plate, 32,34,36 …… Insulation member, 36c …… Insertion hole, 35 …… Electrode orifice, 46 …… Bis (connector).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeki Sato 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (56) Reference JP-A 1-210637 (JP, A) JP-A 1-120452 (JP, A) Actual Kaihei 2-71142 (JP, U)

Claims (3)

[Scope of utility model registration request] 1. An inner cylinder member attached to one of a vibrating body and a vibrating body, and an outer body arranged so as to surround the outer side of the inner cylinder member and attached to the other of the vibrating body and the vibrated body. A tubular member, a support elastic body interposed between the inner tubular member and the outer tubular member, a main fluid chamber separated by the support elastic body, a main fluid chamber separated from the main fluid chamber, and an elastic thin film. The sub-fluid chambers that are separated from each other, the main fluid chamber and the sub-fluid chamber are communicated with each other, and the arc-shaped orifice passages are provided along the inner circumference of the outer tubular member and the orifice passages. An electrode rheology fluid whose viscosity is changed according to an applied voltage is enclosed in the main fluid chamber, the sub-fluid chamber and the electrode orifice, and is applied to the electrode orifice. Depending on the control voltage In a cylindrical control mount in which a damping rate of a fluid moving in a fis passage is variable, the electrode member of the electrode orifice is radially separated from the outer cylindrical member and the support elastic body with a predetermined distance. And the first and second negative electrode plates to which the voltage of the ground electrode is applied and which separates both sides of the orifice passage in the radial direction by itself, and between the first and second negative electrode plates. And a positive electrode plate to which a control voltage of a positive electrode is applied, the cylindrical control mount being disposed at an appropriate position supported by an insulating member. 2. An insertion hole for communicating the outside of the outer cylinder member with the positive electrode plate is formed in one of the insulating members, and a connector for applying a voltage to the positive electrode plate is inserted therein. The cylindrical control mount according to claim 1, wherein the cylindrical control mount is mounted in a hole. 3. The insertion hole is communicated with the inside of the orifice passage, and the insertion hole is liquid-tightly stopped by the connector.
The cylindrical control mount according to claim 2, wherein the opening is an inlet for an electrorheological fluid.